Patent application number | Description | Published |
20080205331 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SYSTEM INFORMATION IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving system information in a mobile communication system are provided, in which a System Frame Number (SFN) is transmitted as system information, and other system information, which excludes the SFN, is transmitted using resources different from resources used to transmit the SFN on a broadcast channel. | 08-28-2008 |
20080212464 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION IN A SINGLE CARRIER FDMA SYSTEM - Provided is a method and an apparatus for transmitting a large quantity of control information in a mobile communication system. When there is no uplink data to be transmitted, a UE spreads second control information, a quantity of which is less than or equal to a pre-defined threshold, by using a ZC sequence cyclic-shifted according to resource blocks, each of which indicates at least one time interval used for a transmission of the second control information. When there is uplink data to be transmitted, the UE performs TDM of the uplink data with third control information. When there is no uplink data to be transmitted and the quantity of control information exceeds a pre-defined threshold, or when the first control information includes various types of information, the UE spreads the first control information in a time domain by the orthogonal codes. | 09-04-2008 |
20080212532 | APPARATUS AND METHOD FOR ALLOCATING RESOURCES IN A SINGLE CARRIER-FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - An apparatus and method for allocating resources in an Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system are provided, in which a Node B determines on a cell basis whether to turn or off inter-subband hopping and whether to turn on or off mirroring for a resource unit for the UE on a frequency axis along which at least two subbands are defined, at set hopping times, selects a resource unit by selectively performing inter-subband hopping and mirroring on the resource unit for the UE according to the determination, and allocates the selected resource unit to the UE. | 09-04-2008 |
20080212555 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION TO RANDOMIZE INTER-CELL INTERFERENCE IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided, in which different cyclic shift values are generated for different SC-FDMA symbols in one of a slot and a subframe, a sequence allocated for CDM of control information is cyclically shifted by the cyclic shift values, and a control channel signal including the control information is combined with the cyclically shifted sequences on an SC-FDMA symbol basis and transmitted in the SC-FDMA symbols. | 09-04-2008 |
20080212556 | APPARATUS AND METHOD FOR ALLOCATING RESOURCES IN A SINGLE CARRIER-FREQUENCY DIVISION MULTIPLE ACCESS SYSTEM - An apparatus and method for allocating resources in an Single Carrier-Frequency Division Multiple Access (SC-FDMA) communication system are provided, in which a Node B performs inter-subband hopping on a resource unit for a User Equipment (UE) on a frequency axis along which at least two subbands are defined, at each predetermined hopping time, determines whether to turn on or off mirroring in a subband having the hopped resource unit on a cell basis at the each hopping time, selects a resource unit by selectively mirroring the hopped unit according to the determination, and allocates the selected resource unit to the UE. | 09-04-2008 |
20080225786 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING A CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting a control channel of a base station in a mobile communication system. A downlink control channel signal generator generates a downlink control channel signal to be transmitted to a User Equipment (UE). A control channel candidate processor calculates a control channel decoding attempt order according to a state of the downlink channel. A controller determines a control channel candidate to be used, according to the calculated decoding attempt order. A mapper maps the generated control channel signal to the determined control channel candidate. A transmission processor wirelessly transmits the mapped signal. | 09-18-2008 |
20080267122 | METHOD AND APPARATUS FOR MAPPING/DEMAPPING MODULATION SYMBOLS IN A MOBILE COMMUNICATION SYSTEM - A method for mapping wireless resources of reference symbols for channel state estimation and modulation symbols for user information transmission in a transmitter of an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system is disclosed. The mapping method includes channel-encoding and modulating a user information stream to be transmitted, and then generating a systematic symbol stream and a parity symbol stream; and preferentially arranging systematic modulation symbols in resource elements of a symbol including no reference symbol, and then arranging parity modulation symbols in remaining resource elements. | 10-30-2008 |
20080273479 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL CHANNELS BY RESTRICTING A SET OF THE CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a control channel in a base station for a wireless communication system. The base station transmits information including a number of channel elements constituting control channels, to a terminal; establishes a set of control channels that the terminal can receive, within the number of channel elements using an identifier (ID) of the terminal; and transmits control information to the terminal through a selected control channel among the control channels. The terminal is restricted to monitor only a proper number of control channels established without the need to monitor all control channels, thereby reducing reception complexity and avoiding unnecessary battery consumption. | 11-06-2008 |
20080273491 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN AN ORTHOGONAL FREQUENCY MULTIPLEXING SYSTEM - A method and apparatus for transmitting and receiving data in an Orthogonal Frequency Division Multiplexing (OFDM) system are provided, in which a Base Station (BS) generates a signal of a broadcast channel, determines whether the broadcast channel signal includes Reference Symbols (RSs) used for channel estimation, determines to apply a maximal puncturing pattern to a Resource Block that defines the broadcast channel, if the broadcast channel signal includes Rs, includes puncturing information about a downlink signal in the broadcast channel signal, maps the broadcast channel signal including the puncturing information to Resource Elements according to the maximal puncturing pattern, and transmits the mapped broadcast channel signal. | 11-06-2008 |
20080273516 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION TO RANDOMIZE INTER-CELL INTERFERENCE IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving control information in an SC-FDMA system are provided. Different orthogonal codes are generated for different slots each including a plurality of SC-FDMA symbols in a subframe. A control channel signal is generated by multiplying control symbols carrying control information by a sequence allocated for CDM of the control information. The control channel signal is multiplied by chips of the orthogonal codes on an SC-FDMA symbol basis and transmitted in the SC-FDMA symbols. | 11-06-2008 |
20080285529 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING PILOT SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting a pilot signal in a wireless communication system. A reference cell scrambling code or one of a plurality of additional cell scrambling codes is selected for each combination of one of a plurality of first scrambling codes (PSCs) applied to a first synchronization channel (P-SCH) and one of a plurality of second scrambling codes (SSCs) applied to a second synchronization channel (S-SCH). It is determined whether to transmit the pilot signal using the reference cell scrambling code or one of the plurality of additional cell scrambling codes. The reference cell scrambling code or the additional cell scrambling code is generated according to the determination. The pilot signal is transmitted using the generated reference cell scrambling code or the additional cell scrambling code. | 11-20-2008 |
20080293424 | METHOD AND APPARATUS FOR ALLOCATING ACKCH RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - A method for allocating physical resources to an Acknowledgement (ACK)/Negative Acknowledgement (NACK) signal channel representative of a response signal in a wireless communication system. The method includes grouping ACK/NACK signal channels corresponding to a plurality of resource blocks used for transmission of a data channel or a control channel into a plurality of groups so ACK/NACK signal channels having consecutive indexes do not belong to the same group; and allocating same frequency resources to ACK/NACK signal channels belonging to the same ACK/NACK signal channel group and allocating orthogonal sequences so ACK/NACK signal channels in each ACK/NACK signal channel group are distinguished in a code domain. | 11-27-2008 |
20080298497 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING UPLINK CHANNEL SOUNDING REFERENCE SIGNALS IN A WIRELESS COMMUNICATION SYSTEM - Provided is a method for transmitting an uplink Channel Sounding (CS) Reference Signal (RS) channel in a wireless communication system. The method includes transmitting symbols of the CS RS channel through an entire system band in a previously selected at least one of Long Blocks (LBs) constituting one time slot of a subframe; and transmitting symbols of control channels through a predetermined band in LBs remaining after symbols of the CS RS channel are applied in the time slot, by applying an orthogonal sequence determined according to the number of LBs to which symbols of the CS RS channel are applied. | 12-04-2008 |
20080304467 | CONTROL AND DATA SIGNALING IN SC-FDMA COMMUNICATION SYSTEMS - Apparatus and method for multiplexing control information bits and data information bits into sub-frame symbols depending on the location of symbols carrying a reference signal (RS), to provide an estimate for the channel medium and enable coherent demodulation for signals carrying information bits. The control information bits include ACK or NAK and/or channel CQI bits. The ACK/NAK bits are placed with priority in symbols around the symbols carrying the RS, to allow for improved accuracy of the channel estimate, followed by the CQI bits when both ACK/NAK and CQI bits exist. Moreover, the sub-frame resources required to achieve the desired reception reliability for the control information depend on the operating conditions and can varied to minimize the associated control overhead. | 12-11-2008 |
20080310360 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CHANNEL QUALITY INDICATOR IN COMMUNICATION SYSTEM - A method and apparatus for transmitting/receiving a Channel Quality Indicator (CQI) in a communication system are provided. It is determined whether there is any uplink data to transmit, when a CQI transmission time arrives according to a predetermined CQI transmission period. If there is uplink data to transmit, a part of the uplink data is punctured to insert the CQI therein, and the inserted CQI is multiplexed with the uplink data before transmission. It is determined whether there is any uplink data to receive from a terminal, when a CQI reception time arrives according to a predetermined CQI transmission period. If there is uplink data to receive, the uplink data is received from the terminal, and the received uplink data is demultiplexed to extract the CQI. | 12-18-2008 |
20080310535 | METHOD AND APPARATUS FOR SYMBOL TRANSMISSION IN AN OFDM MOBILE COMMUNICATION SYSTEM - A mapping method and an apparatus, which uniformly distribute bits included in transmission symbols to various resource blocks in mapping the transmission symbols to the resource blocks for transmission in an OFDMA mobile communication system. A sub-packet generator generates a sub-packet by selecting symbols from coded symbols including a first bit group and a second bit group, the first bit group having a different priority than the second bit group. A divider divides each bit group of the sub-packet into as many bit streams as previously allocated resource blocks. A resource block mapper maps the divided bit streams to the resource blocks, respectively, and outputs the bit streams for transmission. | 12-18-2008 |
20080311942 | METHOD AND APPARATUS FOR ALLOCATING AND ACQUIRING ACK/NACK RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A method for allocating resources for transmission of an uplink Acknowledgement (ACK)/Negative ACK (NACK) used for indicating success/failure in reception of downlink transmission data by a base station in a mobile communication system. The resource allocation method includes determining a mapping rule between control channel elements constituting a downlink control channel and resources for ACK/NACK transmission; transmitting, to at least one User Equipment (UE), control information used for indicating to acquire the determined mapping rule and resources for ACK/NACK transmission allocated using the mapping rule; transmitting a downlink data channel though a predetermined scheduling operation; and transmitting the downlink control channel to the UE. | 12-18-2008 |
20090003473 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING COMMON CONTROL CHANNELS IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving a common control channel in an Orthogonal Frequency Division Multiplexing (OFDM) mobile communication system. In the transmission apparatus, when a plurality of bursts are transmitted during a Transmission Time Interval (TTI) of the common control channel, an Inverse Fast Fourier Transform (IFFT) mapper generates bursts that are shifted in a frequency domain by applying a predetermined cyclic shift offset between the bursts, and maps the generated bursts in a resource block. A transmission unit transmits the bursts to a receiver. In the reception apparatus, a reception unit receives a burst, and a combining unit combines the received burst with a burst stored in a buffer. A decoder decodes each of the combined bursts, and upon a successful decoding, detects a TTI start timing of the common control channel from the successfully decoded burst. | 01-01-2009 |
20090003486 | APPARATUS AND METHOD FOR MAPPING SYMBOLS TO RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for mapping coded data symbols to resources in a mobile communication system. An S/P converter converts a serial signal including user data or control information into a plurality of parallel signals. A DFT unit performs Discrete Fourier Transform (DFT) on the parallel signals output from the S/P converter. A controller controls the DFT unit so that among the signals output from the S/P converter, a control channel is mapped in the maximum available resources to which the control channel can be mapped, among the resources included in a resource block, and data symbols are mapped to the remaining resources, except for the maximum available resources to which the control channel can be mapped. A subcarrier mapper allocates the signals output from the DFT unit to subcarriers. An RF processor converts a signal output from the subcarrier mapper into a radio signal. | 01-01-2009 |
20090010240 | PARTITIONING OF FREQUENCY RESOURCES FOR TRANSMISSION OF CONTROL SIGNALS AND DATA SIGNALS IN SC-FDMA COMMUNICATION SYSTEMS - A method for the partitioning frequency resources used in the transmission of control signals and data signals by user equipments in a communication system. The control signals and data signals are for periodic transmission and dynamic transmission. Also provided is an apparatus and method for user equipments to determine the first frequency unit available for the transmission of dynamic control signals, such as acknowledgement signals associated respective reception of data signals configured through a scheduling assignment by a serving Node B. The utilization of the operating bandwidth is maximized by avoiding fragmentation and facilitates the achievement of reception reliability targets particularly for control signals. | 01-08-2009 |
20090022135 | APPARATUS AND METHOD FOR TRANSMITTING OF CHANNEL QUALITY INDICATOR AND ACKNOWLEDGEMENT SIGNALS IN SC-FDMA COMMUNICATION SYSTEMS - A method and apparatus for multiplexing positive or negative acknowledgement signals (ACK or NACK, respectively) and channel quality indication (CQI) signals from a user equipment (UE) to a serving base station (Node B) during a CQI transmission time interval (TTI) in a single-carrier frequency division multiple access (SC-FDMA) communication system. The UE does not have simultaneous data transmission. The multiplexing of acknowledgement signals is implicitly achieved by the UE applying different orthogonal covers on the reference signal (RS) symbols transmitted in the CQI TTI, depending on whether the UE sends ACK or NACK. At the Node B receiver, the detection of ACK or NACK is based on the accumulated RS energy, after removing each of the possible orthogonal covers applied at the UE transmitter. For robust system performance, absence of ACK/NACK and NACK are mapped onto the same orthogonal cover. | 01-22-2009 |
20090034465 | METHOD AND SYSTEM FOR DIMENSIONING SCHEDULING ASSIGNMENTS IN A COMMUNICATION SYSTEM - A system and method for performing Scheduling Assignments (SAs) for User Equipments (UEs) at a base station of a communication system by accounting for the different operating conditions UEs may experience or for the different data rates or data packet sizes UEs may require. This reduces a total size of SAs by introducing compact SAs, in addition to full SAs. For compact SAs, the range for the resource allocation or for the spectral efficiency of the signal transmission is restricted or some fields that exist in the full SA are eliminated without adversely impacting scheduling flexibility or system throughput. By reducing the total size of SAs through the use of compact SAs, the corresponding control signaling overhead is reduced, which improves system throughput, improves scheduling flexibility, or improves coverage. | 02-05-2009 |
20090034505 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DIFFERENT SIGNAL TYPES IN COMMUNICATION SYSTEMS - A method and apparatus for multiplexing a reference signal from a User Equipment (UE), not having any other signal transmission in the respective Transmission Time Interval (TTI), with a reference signal from another UE also having data transmission in the respective TTI, or with the control signal and reference signal from another UE transmitted in the respective TTI. The multiplexed reference signal from the UE not having any other signal transmission in the respective TTI can serve as a sounding reference signal to enable the serving base station to apply link adaptation to a subsequent signal transmitted by the UE or it can serve as a reference signal conveying state information, such as resource request or service request. | 02-05-2009 |
20090041139 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING UPLINK CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting/receiving pilot symbols for demodulation of control channel information in the uplink of a wireless communication system are provided. When an Evolved Node B (ENB) expects to receive both the Channel Quality Information (CQI) and the Acknowledgement (ACK)/Negative ACK (NACK) from a User Equipment (UE) in a certain subframe, if the UE transmits only the CQI channel, the ENB is prevented to detect the nonexistent ACK/NACK information from the CQI channel, thereby avoiding false alarm. | 02-12-2009 |
20090046646 | APPARATUS AND METHOD FOR ALLOCATING CODE RESOURCES TO UPLINK ACK/NACK CHANNELS IN A CELLULAR WIRELESS COMMUNICATION SYSTEM - A method and apparatus are provided for allocating code resources to ACK/NACK channel indexes, when UEs need ACK/NACK transmission in a wireless communication system in which a predetermined number of orthogonal cover Walsh codes is selected from among available orthogonal cover Walsh codes, at least one subset is formed, having the selected orthogonal cover Walsh codes arranged in an ascending order of cross interference, subsets are selected for use in first and second slots of a subframe, and the orthogonal cover Walsh codes of the subset selected for each slot and ZC sequence cyclic shift values are allocated to the ACK/NACK channel indexes. | 02-19-2009 |
20090060004 | SEQUENCE HOPPING IN SC-FDMA COMMUNICATION SYSTEMS - A method and apparatus are provided for the selection of sequences used for the transmission of signals from user equipments in a cellular communication system. The sequences can be selected either through planning or through pseudo-random hopping among a set of sequences. With planning, the serving Node B signals the sequence assignment for each cell, which remains invariable in time. With pseudo-random sequence hopping, which has the same pattern in all cells, the serving Node B signals the initial sequence, from a set of sequences, which can be different among cells. The signals can be transmitted either through a data channel or through a control channel. The initial sequence used in the control (or data) channel is signaled by the serving Node B. The initial sequence used in the data (or control) channel is selected to be the sequence in a set of sequences with number equal to a shift value relative to the first sequence as signaled by the serving Node B for the control (or data) channel. | 03-05-2009 |
20090097457 | REPEATING TRANSMISSIONS OF SIGNALS IN COMMUNICATION SYSTEMS - Methods and apparatuses for a User Equipment (UE) to transmit an acknowledgement signal over multiple Transmission Time Intervals (TTIs). The acknowledgement signal is in response to a data packet reception and is transmitted in a different resource in each of the multiple TTIs, if the data packet reception is through a scheduling assignment, or is transmitted in the same resource in each of the multiple TTIs, if the data packet reception is periodic. The UE transmitting an acknowledgement signal over multiple TTIs should not transmit additional acknowledgement signals in subsequent TTIs before the initial acknowledgement signal transmission is completed. The UE should also not transmit data signals or other control signals in the same or subsequent TTIs before completing transmission of an acknowledgement signal over multiple TTIs. | 04-16-2009 |
20090100300 | METHOD AND APPARATUS FOR INTERLEAVING DATA IN A MOBILE COMMUNICATION SYSTEM - An interleaving method to which time-first-mapping is applied for a plurality of channel-coded and rate-matched code blocks considering a modulation scheme in a mobile communication system is provided. The interleaving method includes determining sizes of a horizontal area and a vertical area of an interleaver memory, selecting a defined number of adjacent coded symbols in a same code block according to a modulation scheme, generating modulation groups in a vertical direction, sequentially writing the modulation groups in the horizontal area on a row-by-row basis, and sequentially reading the symbols written in the interleaver memory on a column-by-column basis. | 04-16-2009 |
20090232101 | CONTROL AND DATA MULTIPLEXING IN COMMUNICATION SYSTEMS - Apparatus and method for a base station to assign to a user equipment (UE) communicating with the base station a number of coded control information symbols being transmitted with coded data information symbols during the same transmission time interval by the UE. The method includes assigning, by the base station, an offset to the UE, assigning, by the base station, a Modulation and Coding Scheme for data information (data MCS) to the UE, transmitting the offset to the UE, and transmitting the data MCS to the UE, wherein the number of coded control information symbols assigned to the UE for transmission of control information is determined based on the data MCS and the offset. | 09-17-2009 |
20090245209 | APPARATUS AND METHOD FOR ALLOCATING OVSF CODES AND I/Q CHANNELS FOR REDUCING PEAK-TO-AVERAGE POWER RATIO IN TRANSMITTING DATA VIA ENHANCED UP-LINK DEDICATED CHANNELS IN WCDMA SYSTEMS - An apparatus and method in which an Enhanced Uplink Dedicated transport CHannel (EUDCH) is used in a Wideband Code Division Multiple Access (WCDMA) system is provided. In a User Equipment (UE), when physical channels for transmitting EUDCH data are transmitted in addition to existing physical channels, a Peak-to-Average Power Ratio (PAPR) of an uplink transport signal increases. The increase in PAPR depends upon Orthogonal Variable Spreading Factor (OVSF) codes allocated to the corresponding physical channels and In-phase/Quadrature-phase (I/Q) channels. Therefore, the apparatus and method allocate optimum OVSF codes and I/Q channels to EUDCH-related physical channels in order to minimize an increase in PAPR due to EUDCH. | 10-01-2009 |
20090245412 | Method and Apparatus for Multiplexing Data and Control Information in Wireless Communication Systems Based on Frequency Division Multiple Access - An apparatus for transmitting data in a frequency division multiple access based communication system is disclosed. The apparatus includes a symbol block generator for generating a symbol block in a predetermined symbol block period within one TTI when control information to be transmitted exists in the TTI, an FFT unit for performing FFT on the symbol block, and an IFFT unit for performing IFFT on signals output from the FFT unit and then transmitting the signals. The symbol block includes the control information and data to be transmitted. The TTI includes multiple symbol block periods. | 10-01-2009 |
20090316756 | APPARATUS AND METHOD FOR TRANSMISSION OF SOUNDING REFERENCE SIGNAL IN UPLINK WIRELESS COMMUNICATION SYSTEMS WITH MULTIPLE ANTENNAS AND SOUNDING REFERENCE SIGNAL HOPPING - A sounding reference signal transmission method which is efficient in an uplink wireless telecommunications system using a multiple antenna technique and sounding reference signal hopping. A terminal using the multiple antenna technique is equipped with a plurality of antennas, and a base station receives the sounding reference signal transmitted from these antennas and estimates the uplink channel state of each antenna. Moreover, the sounding reference signal performs frequency hopping so that the base station determines the channel condition for the entire bandwidth to which data is transmitted in the uplink system. The sounding reference signal is transmitted through an antenna pattern in which the sounding reference signal can be transmitted through the entire data transmission bandwidth of the uplink system for each antenna of the terminal without additional overhead in this environment. | 12-24-2009 |
20100002674 | Method for configuring gain factors for uplink service in radio telecommunication system - A method for configuring gain factors in a WCDMA telecommunication system is provided in which the gain factor for defining power required for normal reception of uplink data in an environment supporting an uplink service over an E-DCH can be configured using minimal signaling information. First gain factors for first TFs corresponding to a part of a TF set including a plurality of TFs available for an uplink service are received. One of the first TFs is determined as a reference TF for a second TF other than the first TFs in the TF set. Then, a second gain factor for the second TF is calculated using the first gain factor for the determined reference TF. The second gain factor is used for transmitting or receiving uplink data. | 01-07-2010 |
20100039970 | METHOD AND APPARATUS FOR SUPPORTING MULTIPLE REFERENCE SIGNALS IN OFDMA COMMUNICATION SYSTEMS - Methods and apparatuses are described for a Node B to transmit Reference Signals (RS) from multiple antennas to enable User Equipments (UEs) to perform demodulation of received information signals and to estimate Channel Quality Indication (CQI) metrics. To minimize overhead and enable backward compatible operation with legacy systems, RS from a first set of Node B antennas are transmitted in every transmission time interval and substantially over the whole operating BandWidth (BW). RS from a second set of Node B antennas serving for CQI estimation are periodically transmitted, substantially over the whole operating BW, with transmission period informed to UEs through broadcast signaling by the Node B and starting transmission sub-frame determined from the identity of the cell served by the Node B. RS from the second set of antennas, and new RS from the first set of antennas, serving for demodulation of information signals have substantially the same BW as the information signals which can be smaller than the operating BW. | 02-18-2010 |
20100074205 | TRANSMISSION OF SOUNDING REFERENCE SIGNALS IN TDD COMMUNICATION SYSTEMS - A method and apparatus for transmitting and receiving a Sounding Reference Signal (SRS) to a network in a communication system. A bandwidth allocated by the network to transmissions of one or more random access channels is determined. An SRS bandwidth configuration is reconfigured by setting a maximum bandwidth value of the SRS bandwidth configuration to a value that avoids overlapping the bandwidth allocated to transmissions of the one or more random access channels. The SRS is transmitted in accordance with a bandwidth from the reconfigured SRS bandwidth configuration. Information regarding the SRS bandwidth configuration is provided to a User Equipment (UE) by the network. | 03-25-2010 |
20100080187 | APPARATUS AND METHOD FOR SUPPORTING TRANSMISSION OF SOUNDING REFERENCE SIGNALS FROM MULTIPLE ANTENNAS - Methods and apparatuses, through the use of a Downlink Control Indication (DCI) format or through higher layer signaling, for dynamic activation and deactivation of Sounding Reference Signal (SRS) transmissions from User Equipments (UEs) in an UL Component Carrier (CC) with configured SRS transmissions, the dynamic configuration of SRS transmissions parameters, the dynamic activation and configuration of SRS transmissions in an UL CC without previously configured SRS transmissions for a reference UE, and the configuration of SRS transmissions from multiple UE transmitter antennas. | 04-01-2010 |
20100103899 | Method and apparatus for signaling user equipment status information for uplink packet transmission in a soft handover region - A method and apparatus are provided for transmitting user equipment (UE) status information in communication with one serving Node B and at least one non-serving Node B in a mobile communication system. The method and apparatus comprise generating transport channel data including UE status information; transmitting the transport channel data to the serving Node B and the at least one non-serving Node B, receiving a response signal for the transport channel data from the serving Node B, and retransmitting the transport channel data if the response signal received from the serving Node B is a non-acknowledge (NACK) signal, and ending the retransmission of the transport channel data if the response signal received from the serving Node B is an acknowledge (ACK) signal. | 04-29-2010 |
20100135237 | TRANSMISSION OF SCHEDULING ASSIGNMENTS IN MULTIPLE OPERATING BANDWIDTHS - Methods and apparatuses are described for the transmission of Scheduling Assignments (SAs) from a base station to User Equipments (UEs) for data reception in the downlink or data transmission in the uplink of a communication system consisting of multiple Component Carriers (CCs). The SAs are separately coded and transmitted using elementary units (Control Channel Elements or CCEs). Locations of CCEs determine whether an SA is intended for a first CC or for a second CC. Further, the location of CCEs for an SA intended for a first CC is used to determine locations of CCEs for an SA intended for a second CC. | 06-03-2010 |
20100195575 | TRANSMITTING UPLINK CONTROL INFORMATION OVER A DATA CHANNEL OR OVER A CONTROL CHANNEL - Methods and apparatus are described for a User Equipment (UE) to concurrently transmit Uplink Control Information (UCI) and data information to a Node B. The Node B can configure the UE whether to transmit UCI together with data information in a Physical Uplink Shared CHannel (PUSCH) or, separate from data information, in a Physical Uplink Control CHannel (PUCCH). The UE may also determine whether to transmit UCI together with data information in the PUSCH or, separate from data information, in the PUCCH based on criteria involving either a ratio of PUSCH resources for UCI transmission over the total PUSCH resources, a Modulation and Coding Scheme (MCS) for the data information, an absolute power difference between PUCCH and PUSCH transmissions, whether the PUSCH transmission uses frequency hopping, or whether spatial multiplexing is used for the data transmission. | 08-05-2010 |
20100195604 | CONTROL SIGNALING FOR TRANSMISSIONS OVER CONTIGUOUS AND NON-CONTIGUOUS FREQUENCY BANDS - Methods and apparatus are provided for constructing scheduling assignments for transmission, by a User Equipment (UE), of data signals over a single contiguous bandwidth and multiple non-contiguous clusters of contiguous bandwidth. The scheduling assignments for each transmission structure are designed to always result into the same maximum number of decoding operations the UE needs to perform to receive the scheduling assignments. The data signal transmission over the single contiguous bandwidth can be with or without frequency hopping and the data signal transmission over the multiple non-contiguous clusters of contiguous bandwidth may always be without frequency hopping. | 08-05-2010 |
20100195607 | PHYSICAL CHANNEL COMMUNICATION METHOD FOR RANDOM ACCESS IN WIRELESS COMMUNICATION SYSTEM - A physical channel communication method and apparatus for random access in a cellular communication system including a plurality of relay nodes and user equipments using the same system information is provided. The physical channel communication method for random access in a wireless communication system according to the present invention includes receiving, by at least two relay nodes connected to a base station, system information containing a Physical Random Access CHannel (PRACH) region allocation information for identifying user equipments attached to the relay nodes; receiving PRACHs for random accesses transmitted by the user equipments; and transmitting the PRACHs to the base station on relay node-specific resource regions according to the PRACH region allocation information. | 08-05-2010 |
20100208679 | TRANSMISSION OF ACKNOWLEDGEMENT SIGNALS - Methods are described for a Node B to transmit and for a User Equipment (UE) to receive ACKnowledgement (ACK) information associated with the use of Hybrid Automatic Repeat reQuest (HARQ), also known as HARQ-ACK signaling, in a communication system that includes multiple downlink component carriers or multiple uplink component carriers. An HARQ-ACK signal to a UE is in response to a data packet transmission from the UE and may consist of 2 information bits when the UE has 2 or more transmitter antennas. The HARQ-ACK signal is always located in the same downlink component carrier as the scheduling assignment resulting to the data packet transmission from the UE. | 08-19-2010 |
20100232285 | METHOD AND APPARATUS FOR ALLOCATING BACKHAUL TRANSMISSION RESOURCE IN WIRELESS COMMUNICATION SYSTEM BASED ON RELAY - In a relay based wireless communication system, a method for transmitting an uplink backhaul of a relay node includes obtaining scheduling information for an uplink backhaul sub-frame through a downlink backhaul control channel from a base station, and performing a rate matching and mapping of data by regarding at least one predefined symbol as a blank symbol. The predefined symbol is located at a front part or a rear part of the scheduled uplink backhaul sub-frame. The transmitting method further includes performing a multiplexing of the uplink backhaul sub-frame, and transmitting the multiplexed uplink backhaul sub-frame. This method can eliminate an overlap of transmission and reception timing in a relay node due to an RF transmission/reception switching time delay. Also, the method can make better use of wireless backhaul resources and minimize an influence on conventional systems by offering the compatibility with conventional uplink and downlink sub-frame structures. | 09-16-2010 |
20100246463 | UPLINK TRANSMISSION POWER CONTROL IN MULTI-CARRIER COMMUNICATION SYSTEMS - In a communication system wherein a User Equipment (UE) transmits at least two data channels in at least two respective component carriers, a method and apparatus for reducing a transmission power allocated to each of the least two data channels relative to each of a respective nominal transmission power, when a total nominal transmission power for the at least two data channels exceeds a predetermined value are provided. The method includes reducing a transmission power of the first data channel by a first amount; and reducing a transmission power of the second data channel by a second amount, wherein the first amount and the second amount have different values. | 09-30-2010 |
20100260156 | Apparatus and method for transmitting system information block in a broadband wireless communication system - An operation method of the femto BS includes configuring a subframe set including at least two types of subframes among subframes having predefined different structures, and, if a duration of a subframe carrying the subframe set arrives, transmitting one of the subframes included in the subframe set according to predefined order. The subframes having the predefined different structures include a first type subframe including a synchronization signal and a Master Information Block (MIB), a second type subframe including the synchronization signal, a third type subframe including the synchronization signal and system information, a fourth type subframe including the synchronization signal, the MIB, and the system information, and a fifth type subframe including the system information. | 10-14-2010 |
20100278109 | MULTIPLEXING LARGE PAYLOADS OF CONTROL INFORMATION FROM USER EQUIPMENTS - Disclosed is multiplexing transmissions of Uplink Control Information (UCI) signals having variable payloads from User Equipments (UEs). The UCI transmission uses a first format type if its size is less than or equal to a predetermined values and it uses a second format type if its size is greater than a predetermined value. When the first format type is used the UE multiplexing is through a first method while when the second format type is used the UE multiplexing is through a second method which is different than the first method. The structure of the second format type is the same as the structure used for the transmission of data information by UEs. The UEs can also be grouped and UCI transmission can be triggered through the reception of control signaling addressing a group of UEs and indicating UCI transmission by a sub-group of UEs in the group of UEs. | 11-04-2010 |
20100318871 | APPARATUS AND METHOD FOR RESOURCE ALLOCATION INFORMATION TRANSMISSION IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for resource allocation information transmission is provided. The method includes determining a search space for use in a second frequency band using resource allocation information of a first process detected in a first frequency band, detecting resource allocation information using the search space in the second frequency band, and when failing to decode received data according to the resource allocation information detected in the second frequency band, re-detecting resource allocation information of the first process in the second frequency band in a first time interval using the search space without detecting the resource allocation information of the first process in the first frequency band. | 12-16-2010 |
20100322174 | METHOD AND APPARATUS FOR A MOBILE SELECTION BASED INITIAL ACCESS SCHEME IN A MULTICARRIER SYSTEM - A method and apparatus for initial access of a mobile device in multi-carrier system. A base station transmits initial access resource information about the entire system band to the mobile device through a specific carrier to which the mobile device tries initial access. The mobile device determines an uplink initial access band by using received initial access resource information. The base station enables initial access through a predefined downlink response band. | 12-23-2010 |
20100323744 | METHOD AND APPARATUS FOR CONTROLLING UPLINK TRANSMISSION POWER IN WIRELESS COMMUNICATION SYSTEM - A method and system are provided for controlling uplink transmission power in a wireless communication system. At least one of a plurality of downlink carriers and a plurality of uplink carriers are aggregated, and the plurality of downlink carriers and the plurality of uplink carriers are mapped between a User Equipment (UE) and a network in the wireless communication system. A message relating to uplink carrier transmission power is received at the UE from the network via a downlink carrier. Uplink transmission power of one or more uplink carriers is controlled in accordance with the message and aggregation and mapping of at least one of the downlink carrier and the one or more uplink carriers. | 12-23-2010 |
20110038302 | METHOD AND APPARATUS FOR TRANSMITTING REFERENCE SIGNALS IN COMMUNICATION SYSTEMS - Methods and apparatus are described for a Relay Node (RN) that is transparent to User Equipments to transmit, together with a base station (Node B), Reference Signals (RS) to UEs, to receive RS from UEs, to perform transmissions of Transport Blocks (TBs) to the Node B or to UEs and receptions of TBs from the Node B or from UEs, where the transmissions of TBs from the RN are for retransmissions associated with a Hybrid Automatic Repeat reQuest (HARQ) process for the same TBs, and enabling the Node B to obtain control information signaled from UEs while signaling from the RN interferers with that signaling of control information. | 02-17-2011 |
20110038303 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CONTROL CHANNEL - A method and apparatus for transmitting/receiving control channels through a wireless backhaul in an OFDM-based communication system including relay nodes is provided. A method for transmitting a control channel includes arranging control resources for at least one receiver; sorting the control resources and null resources in a control channel region; rearranging the control resources to be distributed and the null resources to be adjacent to the distributed control resources; and mapping the control resources and null resources to the control channel region. | 02-17-2011 |
20110044391 | METHOD AND APPARATUS FOR CONFIGURING CONTROL CHANNEL IN OFDM SYSTEM - A control channel configuration method and apparatus is provided for supporting Inter-Cell Interference Coordination (ICIC) in an OFDM-based communication system. The control channel configuration method includes determining a Resource Block (RB) to be used for configuring control channels; configuring the control channels by mapping the control channels in a data channel region within the RB; and transmitting the configured control channels, wherein configuring the control channels includes mapping the control channels in units of Resource Element Groups (REGs) formed by binding one or more Resource Elements (REs) in a time domain-preferred allocation manner within the same RB. | 02-24-2011 |
20110075624 | EXTENDING PHYSICAL DOWNLINK CONTROL CHANNELS - Methods and apparatus for transmitting and receiving Downlink Control Information (DCI) in a single cell in order to support communication over multiple cells. The DCI is conveyed by DCI formats transmitted through Physical Downlink Control CHannels (PDCCHs) in a UE-Common Search Space (UE-CSS) and in a UE-Dedicated Search Space (UE-DSS). A distinct UE-DSS is defined in the single cell for each of the multiple cells. Each distinct UE-DSS has the same structure as a conventional UE-DSS and a location that is determined by the same parameters as the location of the conventional UE-DSS and by the respective cell identity (Cell_ID). | 03-31-2011 |
20110085483 | METHODS FOR POWER HEADROOM REPORTING, RESOURCE ALLOCATION, AND POWER CONTROL - A method and apparatus for power headroom reporting are provided. The power headroom reporting method for a mobile terminal may include determining whether a Physical Uplink Shared Channel (PUSCH) transmission and a Physical Uplink Control Channel (PUCCH) transmission are allowed to occur in a same subframe; determining whether an event for requesting power headroom reporting is generated; and reporting a first power headroom and a second power headroom to a base station. | 04-14-2011 |
20110085506 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING MULTI-USER CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM WITH MULTIPLE ANTENNAS - Provided are a method and apparatus for transmitting and receiving multi-user control channels through a data channel region in a wireless communication system using multiple antennas. Further provided is a definition of a new search space for control channel candidates. In the transmitting method, a base station forms control channels for a plurality of user equipment each of which is composed of at least one resource block, performs a mapping for the control channels by dividing a space of the same transmission region in a data channel region of a sub-frame, and then multiplexes the control channels with data channels in the data channel region of the sub-frame and to transmit the multiplexed control channels. | 04-14-2011 |
20110128919 | DEVICE AND METHOD FOR SELECTING TRANSCEIVER IN MOBILE COMMUNICATION SYSTEM - A device and method for selecting one of a plurality of transceivers in a mobile terminal are provided. The method includes receiving information about the plurality of transceivers, receiving information about at least one transceiver being used, and transmitting a transceiver switching message. By selectively choosing the transceivers in the mobile terminal, radio resources of a mobile communication system can be more optimally used. | 06-02-2011 |
20110164489 | APPARATUS AND METHOD FOR ENHANCING FEATURES OF UPLINK REFERENCE SIGNALS - Methods and apparatuses for configuring and transmitting Reference Signals (RS) accompanying data signals from User Equipments (UEs), such that Sounding Reference Signals (SRS) are transmitted from some UEs over a part of a possible transmission bandwidth, with or without the use of SRS bandwidth hopping. | 07-07-2011 |
20110165906 | RESOURCE INDEXING FOR ACKNOWLEDGEMENT SIGNALS IN RESPONSE TO RECEPTIONS OF MULTIPLE ASSIGNMENTS - User Equipment (UE) transmits an acknowledgement signal in response to the reception of multiple Scheduling Assignments (SAs) transmitted by a base station. The SAs consist of Information Elements (IEs) including a Transmission Power Control (TPC) IE providing adjustments for the transmission power of the acknowledgement signal. The TPC IE in a first SA of the multiple SAs is used to provide the previous adjustments and the TPC IEs in the remaining of the multiple SAs are used to provide an indication of the resource used for the transmission of the acknowledgment signal. | 07-07-2011 |
20110170533 | METHOD AND APPARATUS FOR MULTIPLEXING DATA AND CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEMS BASED ON FREQUENCY DIVISION MULTIPLE ACCESS - An apparatus for transmitting data in a frequency division multiple access based communication system is disclosed. The apparatus includes a symbol block generator for generating a symbol block in a predetermined symbol block period within one TTI when control information to be transmitted exists in the TTI, an FFT unit for performing FFT on the symbol block, and an IFFT unit for performing IFFT on signals output from the FFT unit and then transmitting the signals. The symbol block includes the control information and data to be transmitted. The TTI includes multiple symbol block periods. | 07-14-2011 |
20110200137 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING CHANNEL STATE INFORMATION REFERENCE SYMBOL IN RELAY NETWORK SYSTEM - An apparatus and method for transmitting/receiving a Channel State Information-Reference Symbol (CSI-RS) in a relay network system are provided. The method for transmitting a CSI-RS in a relay network system includes selecting a subframe to transmit a CSI-RS, from DownLink (DL) subframes, transmitting, to a receive end, identifying information indicating that a CSI-RS is transmitted at the selected subframe, and transmitting a CSI-RS at the selected subframe. | 08-18-2011 |
20110206089 | APPLICATION OF SEQUENCE HOPPING AND ORTHOGONAL COVERING CODES TO UPLINK REFERENCE SIGNALS - Methods and apparatuses are provided to enable User Equipments (UEs) to apply Orthogonal Covering Codes (OCC) to the transmission of Reference Signals (RS) generated from Constant Amplitude Zero Auto-Correlation (CAZAC) sequences, to enable hopping of these sequences in a communication system in conjunction with enabling the application of OCC, and to differentiate the application of sequence hopping between transmissions in data channels and transmissions in control channels. | 08-25-2011 |
20110243008 | COMPONENT CARRIER ACTIVATION METHOD AND APPARATUS IN A CELLULAR COMMUNICATION SYSTEM - A method and apparatus for activating a deactivated Component Carrier in a cellular communication system supporting carrier aggregation. The method includes receiving, from a Base Station (BS), UpLink (UL) scheduling information for a UL CC in a deactivated state; determining whether a DownLink (DL) CC associated with the UL CC is activated; and activating the DL CC, when the DL CC is not activated. | 10-06-2011 |
20110243039 | INDEXING RESOURCES FOR TRANSMISSION OF ACKNOWLEDGEMENT SIGNALS IN MULTI-CELL TDD COMMUNICATION SYSTEMS - Methods and apparatus are described for a User Equipment (UE) to determine a set of resources available for transmitting an acknowledgement signal in an UpLink (UL) Component Carrier (CC) in response to reception of multiple DownLink (DL) Scheduling Assignments (SAs) transmitted from a base station with each DL SA being associated with a respective DL CC. The UL CC and a first DL CC establish a communication link when the UE is configured for communication over a single UL CC and a single DL CC. | 10-06-2011 |
20110249582 | CHANNEL STATE INFORMATION REQUEST/FEEDBACK METHOD AND APPARATUS - A Channel State Information (CSI) request/feedback method and apparatus for a wireless communication system supporting carrier aggregation or bandwidth extension are provided. A base station sets a CSI request field of an Uplink (UL) grant for scheduling UL transmission on a UL Component Carrier (CC) corresponding to a Downlink (DL) CC of which CSI is requested, to a request value. The UL grant is transmitted to a terminal. | 10-13-2011 |
20110249633 | METHOD OF TRANSMITTING AND RECEIVING CONTROL INFORMATION BASED ON SPATIAL-MULTIPLEXING GAIN - A control information transmission and reception method based on a spatial-multiplexing gain, are provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined. | 10-13-2011 |
20110261767 | METHOD AND APPARATUS FOR ALLOCATING A CONTROL CHANNEL RESOURCE OF A RELAY NODE IN A BACKHAUL SUBFRAME - A method and apparatus for allocating control channels of a relay within a backhaul subframe in a wireless communication system is provided. The method for allocating control channel resources includes grouping relays according to channel conditions; transmitting resource group information on the same resource group allocated to use the same transmission mode for the relays belonging to the same relay group; transmitting a control channel message to the relays according to the allocated resource; and transmitting data to the relays according to the control channel message. | 10-27-2011 |
20110261769 | METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE OF CONTROL CHANNELS IN OFDM-BASED HIERARCHICAL CELLULAR SYSTEM - A method and apparatus for controlling inter-cell interference of control channels of hierarchical cells in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM) are provided. The inter-cell interference control method of a base station in a hierarchical cellular system based on Orthogonal Frequency Division Multiplexing (OFDM) includes transmitting a broadcast channel, including information on an available bandwidth that is a part of an entire bandwidth, to a terminal, transmitting a control channel including data channel allocation information for the entire bandwidth to the terminal, and transmitting a data channel, as informed by the data channel allocation information, to the terminal. The inter-cell interference control method and apparatus support cooperative transmission of hierarchical cells while maintaining both backward compatibility and forward compatibility. | 10-27-2011 |
20110268062 | RESOURCE MAPPING METHOD AND APPARATUS OF OFDM SYSTEM - A method and apparatus for allocating resource between uplink ACK/NACK channel and downlink control channel supporting spatial multiplexing in an OFDM-based wireless communication system which configures uplink ACK/NAK channel implicitly using reference signals for discriminating among resource allocation spaces and physical channel resource. The method is capable of multiplexing the uplink ACK/NACK channel associated with the control channel extended by spatial multiplexing into the uplink ACK/NACK channel resource which does not support spatial multiplexing. | 11-03-2011 |
20110268204 | MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATION SYSTEM OF SUPPORTING SEVERAL REPORTING MODES - A plurality of reporting modes used to report feedback information is provided. A transmitter and a receiver generate and share feedback information based on a corresponding reporting mode. | 11-03-2011 |
20110310781 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING UPLINK DATA IN MOBILE COMMUNICATION SYSTEM - A method for transmitting uplink data using multiple carriers by a User Equipment (UE) in a mobile communication system is provided. The method includes determining a first maximum transmission power indicating a maximum transmission power for each carrier and a second maximum transmission power indicating a maximum transmission power for all carriers based on information for setting transmission power, received from an evolved Node B (eNB), determining a minimum value from among a required transmission power and the first maximum transmission power as an uplink transmission power, for each carrier, scaling the determined uplink transmission powers so that a sum of the uplink transmission powers is less than or equal to the second maximum transmission power, and transmitting the uplink data based on the scaled uplink transmission powers. | 12-22-2011 |
20110310829 | METHOD AND APPARATUS FOR GROUPING CONTROL CHANNEL RESOURCE IN MOBILE COMMUNICATION SYSTEM - A method for grouping a control channel resource in an Orthogonal Frequency Division Multiplexing based mobile communication system for adjusting inter-cell interference and an apparatus performing the same are disclosed. Inter-cell inference used between cells or base stations is controlled or distributed to secure reception of a control channel in a heterogeneous system, and interference may be efficiently controlled through coordination of resource groups by cells. The method and apparatus are equally applicable when resources of backhaul transmission channel of a relay cell in a cell are grouped. | 12-22-2011 |
20110310987 | UPLINK POWER CONTROL METHOD FOR MOBILE COMMUNICATION SYSTEM - A per-layer and per-antenna uplink power control method for MIMO transmission of PUSCH in a Long Term Evolution-Advanced (LTE-A) system is provided. A transmit power for a plurality of transmit antennas is calculated based on a power control parameter received in a downlink. Uplink data is transmitted through the plurality of transmit antennas by applying the transmit power to each of a plurality of codewords. | 12-22-2011 |
20110317649 | PARTITIONING OF FREQUENCY RESOURCES FOR TRANSMISSION OF CONTROL SIGNALS AND DATA SIGNALS IN SC-FDMA COMMUNICATION SYSTEMS - A method for the partitioning frequency resources used in the transmission of control signals and data signals by user equipments in a communication system. The control signals and data signals are for periodic transmission and dynamic transmission. Also provided is an apparatus and method for user equipments to determine the first frequency unit available for the transmission of dynamic control signals, such as acknowledgement signals associated respective reception of data signals configured through a scheduling assignment by a serving Node B. The utilization of the operating bandwidth is maximized by avoiding fragmentation and facilitates the achievement of reception reliability targets particularly for control signals. | 12-29-2011 |
20110319068 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING CSI IN CELLULAR COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - A Channel Status Information (CSI) transmission method and apparatus of a terminal are provided for use in a wireless communication system. In the wireless communication system supporting carrier aggregation, the terminal transmits the CSIs of component carriers without conflict of their transmission time points, resulting in an improvement of system performance. In a case where the transmission time points are determined to overlap unavoidably, the terminal transmits the CSI as compressed. | 12-29-2011 |
20120014333 | INTER-CELL INTERFERENCE COORDINATION METHOD AND APPARATUS FOR AN OFDM-BASED HETEROGENEOUS CELLULAR SYSTEM - An inter-cell interference coordination method and apparatus is provided for a heterogeneous network system based on Orthogonal Frequency Division Multiplexing (OFMD) communication. The inter-cell interference coordination method and apparatus exchanges two different types of inter-cell interference coordination messages between base stations to adaptively use the frequency division and time division schemes, thereby coordinating inter-cell interference of control channels transmitted randomly in distributed manner. | 01-19-2012 |
20120033587 | TRANSMISSION OF UPLINK CONTROL SIGNALS IN A COMMUNICATION SYSTEM - A method and apparatus of a User Equipment (UE) to simultaneously transmit information of a first type and information of a second type over a number of transmission symbols, the information of the first type and the information of the second type being respectively associated with a first Orthogonal Cover Code (OCC) and a second OCC, wherein a length of each OCC is equal to the number of transmission symbols. The method includes multiplying, at each transmission symbol, the information of the first type with a respective element of the first OCC to obtain a first output; multiplying, at each transmission symbol, the information of the second type with a respective element of the second OCC to obtain a second output; summing the first output and the second output to obtain a combined output; and transmitting the combined output. | 02-09-2012 |
20120040683 | APPARATUS AND METHODS OF ENHANCERS FOR LOW POWER NODES IN WIRELESS COMMUNICATION - An apparatus and method of communicating with a first plurality of nodes and a second plurality of nodes in wireless communication systems are provided. The apparatus includes a communication unit for receiving node information from the first plurality of nodes, and a controller for generating joint resource information based on the node information received from the first plurality of nodes, wherein the communication unit sends the joint resource information to the second plurality of nodes. | 02-16-2012 |
20120044901 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN A MOBILE COMMUNICATION SYSTEM SUPPORTING UPLINK PACKET DATA SERVICE - A method and apparatus for transmitting and receiving downlink control information in a mobile communication system supporting an uplink packet data service are provided. To transmit packet data in an HARQ mobile communication system, a second transceiver receives an RG as rate control information from a first transceiver. The second transceiver sets the allowed maximum data rate of an HARQ process to which the RG is applied to the allowed maximum data rate of an HARQ process previous to the HARQ process, if the RG indicates hold. The second transceiver transmits packet data within the set allowed maximum data rate to the first transceiver. | 02-23-2012 |
20120057523 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING BACKHAUL SUBFRAME CHANNEL IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method for transmitting a backhaul sub frame channel of a base station in a wireless communication system. The method for transmitting a backhaul sub frame channel according to one embodiment of the present invention comprises: creating a downlink relay control channel by coding downlink relay control information that is transmitted to a relay; allocating the created downlink relay control channel to a first slot of a semi-static resource region that is allocated to the relay; and transmitting, to the relay, a backhaul sub frame to which the channel is allocated. Compared to existing control channel transmission techniques, the present invention can minimize overheads. Moreover, the present invention also reduces control channel resources required during retransmission and for the transmission of multiple backhaul subframes. | 03-08-2012 |
20120063405 | METHOD FOR ALLOCATING RESOURCE IN LTE SYSTEM - The present invention relates to a fractional RB (Resource Block) allocation method which enables resource allocation in a unit smaller than RB to improve the capacity of VoIP (Voice over Internet Protocol) in an LTE (Long Term Evolution) system. That is, the present invention introduces a resource arrangement method which allows different users to share the same resource, without even using an SDMA, and a method for informing the fractional RB allocation and how to use the same. A method for introducing multiplexation into an RB and changing the RE arrangement is proposed to support the downlink fractional RB allocation. A method for changing the RE arrangement is also proposed to support the uplink fractional RB allocation. According to the present invention, to provide a consistent service with a small amount of traffic generated as in the VoIP, resources of a smaller amount than a single RB can be used for a terminal with a good channel state. In the present invention, the occupancy of resources for the terminals of an excellent channel state is reduced so that the capacity of the VoIP can be improved. | 03-15-2012 |
20120088514 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION FOR INTER-CELL COOPERATIVE TRANSMISSION IN WIRELESS COMMUNICATION CELLULAR SYSTEM - A method for transmitting feedback information for cooperative transmission in a wireless communication cellular system comprises: receiving information on cells that can be cooperatively transmitted from a base station; determining cells that prefer the cooperative transmission among the cells that can be cooperatively transmitted; generating feedback information, which includes a preference cell indicator representing preferred cells and non-preferred cells for the cooperative transmission among the cells that can be cooperatively transmitted, precoding matrix information for the respective cell that can be cooperatively transmitted, phase information representing a phase correction value of each of the preferred cells for the cooperative transmission, and a channel quality indicator; and transmitting the feedback information through a control channel or a data channel. Accordingly, the present invention provides a method and apparatus for transmitting and receiving a report of implicative feedback information on code books that can be designed for the gain improvement of a high-level inter-cell cooperative transmission. | 04-12-2012 |
20120099546 | METHOD AND APPARATUS FOR ALLOCATING AND SIGNALING ACK/NACK RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - Methods and apparatus are provided for receiving a physical downlink control channel in a wireless communication system. The physical downlink control channel is received. The physical downlink control channel is decoded. A scheduling type is determined using scheduling type information in the physical downlink control channel. Scheduling information is determined for a data channel according to the scheduling type. | 04-26-2012 |
20120106407 | GENERATION OF HARQ-ACK INFORMATION AND POWER CONTROL OF HARQ-ACK SIGNALS IN TDD SYSTEMS WITH DOWNLINK OF CARRIER AGGREGATION - Methods and apparatus are provided for a User Equipment (UE) configured to have multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system so as to determine a power of an acknowledgement signal that the UE transmits in a control channel and to determine a number of acknowledgement information bits that the UE multiplexes with data information bits in a data channel. A transmission power of the control signal is determined based on DL Assignment Index (DAI) Information Elements (IEs) in DL Scheduling Assignments (SAs) that the UE detects through multiple transmission time intervals and through the multiple configured DL cells. The number of acknowledgement information bits in the data channel is determined based on a DAI IE of an UpLink (UL) SA associated with the transmission of the data channel. | 05-03-2012 |
20120106408 | METHOD AND APPARATUS FOR CODING OF HARQ-ACK TRANSMISSION IN TDD SYSTEMS WITH DOWNLINK CARRIER AGGREGATION - Methods and apparatus are provided for a User Equipment (UE) configured with multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system to determine the coding method for acknowledgement information bits as a function of their number, to apply bundling to the acknowledgement information bits when their number exceeds a first predetermined value, and to partition the acknowledgement information bits, possibly together with other control information bits, into two separate codewords when their total number exceeds a second predetermined value. | 05-03-2012 |
20120113812 | RESOURCE MANAGEMENT SYSTEM AND METHOD FOR INTER-CELL INTERFERENCE COORDINATION IN WIRELESS COMMUNICATION SYSTEM - A resource management system and method for inter-cell interference coordination and channel information feedback in a mobile communication system are provided. The resource management method includes transmitting an Almost Blank Subframe (ABS) set from a first base station to a second base station, transmitting a reference resource configuration set for channel measurement and a Radio Link Monitor/Radio Resource Measurement (RLM/RRM) for radio resource measurement from the second base station to a terminal, and scheduling, at the second base station, the terminal in a subframe selected from the ABS set. | 05-10-2012 |
20120113920 | RESOURCE ALLOCATION METHOD AND APPARATUS FOR WIRELESS COMMUNICATION SYSTEM - A resource allocation method of a base station in a wireless communication system based on a radio frame including a plurality of subframes including at least one first-type subframe and at least one second-type subframe is provided. The method includes generating first-type downlink control information including resource allocation information on the first-type subframe, generating second-type downlink control information including resource allocation information on the second-type subframe, and transmitting the first-type subframe including the first-type downlink control information and the second-type downlink control information, wherein the second-type subframe is transmitted with a lower transmit power than the transmit power of the first-type subframe. | 05-10-2012 |
20120127878 | ANTENNA ALLOCATION APPARATUS AND METHOD FOR CELLULAR MOBILE COMMUNICATION SYSTEM - A method and apparatus for selecting and allocating antennas efficiently are provided. The method includes transmitting, to a User Equipment (UE), information indicating a configuration of a plurality of Channel Status Information Reference Signals (CSI-RSs) through UE specific signaling during an initial access attempt with the UE; receiving, from the UE, CSI-RS measurement results indicating configured CSI-RSs; transmitting CSI-RSs corresponding to a set of available distributed ports (D-ports) based on received signal strength information included in results of the CSI-RS measurement; and determining a CSI-RS of a selected D-port set for use in communications based on feedback information received from the UE. | 05-24-2012 |
20120128095 | APPARATUS AND METHOD FOR MAPPING SYMBOLS TO RESOURCES IN A MOBILE COMMUNICATION SYSTEM - A method for transmitting data information and control information by a transmitter in a communication system is provided. The method includes identifying an amount of resources to be used for control channel transmission within a predetermined maximum amount of resources available for control channel transmission among total resources of a subframe; mapping control information onto the identified amount of resources to be used for the control channel transmission; mapping data information onto all remaining resources of the subframe, other than the identified resources used for the control channel transmission among the total resources; and transmitting information related to the amount of resources to be used for the control channel transmission, through a predetermined control channel; and transmitting the mapped control information, and the mapped data information. | 05-24-2012 |
20120129566 | UPLINK TRANSMISSION POWER CONTROL METHOD AND APPARATUS FOR A DISTRIBUTED ANTENNA MOBILE COMMUNICATION SYSTEM - An uplink power control method and apparatus of a terminal in a mobile communication system are provided. The method includes receiving, by the terminal, a location parameter corresponding to at least one antenna selected among a plurality of antennas distributed in a service area of a base station, each of the plurality of antennas being connected to the base station; and calculating uplink power based on the location parameter. | 05-24-2012 |
20120147766 | CHANNEL STATUS INFORMATION FEEDBACK METHOD AND APPARATUS FOR A DISTRIBUTED ANTENNA MOBILE COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving channel status information in a mobile communication system including a distributed antenna system. The channel status information feedback method of the present invention includes transmitting, to a base station, received signal strengths of reference signals transmitted through at least one of antennas distributed in a service area of the base station and transmitting, to a base station, channel status information corresponding to at least one antenna selected by the base station. | 06-14-2012 |
20120163365 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DIFFERENT SIGNAL TYPES IN COMMUNICATION SYSTEMS - A method and apparatus for multiplexing a reference signal from a User Equipment (UE), not having any other signal transmission in the respective Transmission Time Interval (TTI), with a reference signal from another UE also having data transmission in the respective TTI, or with the control signal and reference signal from another UE transmitted in the respective TTI. The multiplexed reference signal from the UE not having any other signal transmission in the respective TTI can serve as a sounding reference signal to enable the serving base station to apply link adaptation to a subsequent signal transmitted by the UE or it can serve as a reference signal conveying state information, such as resource request or service request. | 06-28-2012 |
20120176926 | SECONDARY CARRIER ACTIVATION/DEACTIVATION METHOD AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - A secondary carrier activation/deactivation method for activating/deactivating secondary carriers in addition to a primary carrier is provided for a mobile communication system supporting carrier aggregation. The method includes identifying, when a secondary carrier control message is received from a base station, carriers to be activated are deactivated, determining, when the message includes a secondary carrier activation command, whether a first time point has arrived, and executing, when the first time point arrives, predetermined first operations. The present invention is advantageous to avoid malfunctions in communication system supporting carrier aggregation by defining UE operations to be taken in SCell activation and deactivation. | 07-12-2012 |
20120176956 | COMMUNICATION SYSTEM WITH RELAYS AND COMMUNICATION THEREIN VIA MULTI-CARRIERS - A system and method is for transmitting multi-carriers in a wireless communication system with a relay are provided. The method includes configuring each of downlink carriers that form the multi-carriers as at least one general sub-frame and at lest one backhaul sub-frame; determining one of the downlink carriers that has a maximum number of backhaul sub-frames, as a primary carrier, and other downlink carriers as sub-carriers; and altering a backhaul sub-frame into a general sub-carrier in the sub-carrier, in response to a general sub-frame of the primary carrier. | 07-12-2012 |
20120176967 | RANDOM ACCESS METHOD AND APPARATUS OF UE IN MOBILE COMMUNICATION SYSTEM - A method and an apparatus for performing random access and uplink transmission of a User Equipment (UE) supporting Carrier Aggregation (CA) are provided. The method includes determining whether a Scheduling Request (SR) is pending, determining, when the SR is pending, whether an uplink transmission resource is available in a current Transmission Time Interval (TTI), determining, when the uplink transmission resource is not available, whether a Physical Uplink Control Channel (PUCCH) resource is configured for transmission of the SR, and initiating, when the PUCCH resource is not configured, a random access process in a primary cell. The random access method and apparatus of the present invention is advantageous to reduce the waste of transmission resources. | 07-12-2012 |
20120176979 | UPLINK TRANSMISSION POWER CONFIGURATION METHOD AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM - A method and an apparatus for configuring uplink transmission power and apparatus in a mobile communication system supporting downlink and uplink carrier aggregation are provided. The method includes determining a per-terminal maximum transmission power and per-serving cell maximum transmission powers based on ΔT | 07-12-2012 |
20120176989 | CONTROL SIGNALING FOR TRANSMISSION OVER CONTIGUOUS AND NON-CONTIGUOUS FREQUENCY BANDS - Methods and apparatus are provided for constructing scheduling assignments for transmission, by a User Equipment (UE), of data signals over a single contiguous bandwidth and multiple non-contiguous clusters of contiguous bandwidth. The scheduling assignments for each transmission structure are designed to always result into the same maximum number of decoding operations the UE needs to perform to receive the scheduling assignments. The data signal transmission over the single contiguous bandwidth can be with or without frequency hopping and the data signal transmission over the multiple non-contiguous clusters of contiguous bandwidth may always be without frequency hopping. | 07-12-2012 |
20120188936 | METHOD AND DEVICE FOR SENDING AND RECEIVING A REFERENCE SIGNAL - The present invention relates to a method for sending and receiving a reference signal for a backhaul subframe in a wireless communication system in which a relay is present and also to a device therefor, constituted in such a way that common reference signals for a plurality of receiving devices and reference signals dedicated to separate receiving devices are allocated dispersed in a subframe, and the common reference signals and the dedicated reference signals are generated and are sent and received via the subframe. The present invention can improve the channel estimation performance for subframes in a wireless communication system. In this way, communications efficiency in wireless communication systems can be improved. | 07-26-2012 |
20120188977 | METHOD AND APPARATUS FOR TRANSMITTING SYNCHRONIZATION SIGNALS IN AN OFDM BASED CELLULAR COMMUNICATIONS SYSTEM - Provided is a method and apparatus for transmitting a synchronization signal for cell search in an Orthogonal Frequency Division Multiplexing (OFDM) communications system. The method includes acquiring Primary Synchronization CHannel (P-SCH) sequence and Secondary Synchronization CHannel (S-SCH) sequence; mapping the P-SCH sequence and the S-SCH sequence onto subcarriers; generating OFDM symbols including the P-SCH sequence and the S-SCH sequence mapped onto subcarriers; and transmitting the OFDM symbols, wherein a frame comprising a plurality of OFDM symbols, a part of the plurality of OFDM symbols in the frame is used for transmitting Synchronization CHannel (SCH) comprising P-SCH and S-SCH, and wherein the P-SCH and the S-SCH are mapped to adjacent OFDM symbols and the S-SCH is mapped to subcarriers with a predetermined interval in a frequency domain within an OFDM symbol. | 07-26-2012 |
20120195271 | METHOD AND DEVICE FOR GENERATING REFERENCE SIGNAL IN CELLULAR MOBILE COMMUNICATION SYSTEM - Methods and apparatus are provided for transmitting and receiving reference signals through distributed antennas deployed within a service area of a base station in a mobile communication system. First control information, including at least two scrambling factor combinations, is received at a terminal from the base station. Second control information, indicating one of the at least two scrambling factor combinations, is received at the terminal from the base station. The one of the at least two scrambling factor combinations is selected based on the second control information. An initial value of a demodulation reference signal sequence is calculated using the selected scrambling factor combination. The demodulation reference signal sequence is received using the initial value. | 08-02-2012 |
20120202544 | METHOD AND APPARATUS FOR SETTING THE INITIAL TRANSMISSION POWER OF A TERMINAL IN A CELLULAR WIRELESS COMMUNICATION SYSTEM THAT SUPPORTS CARRIER AGGREGATION - The present invention relates to a method and apparatus for setting the transmission power of a terminal in a wireless communication system. Particularly, the initial transmission power by means of which the terminal transmits a signal via an uplink non-anchor carrier is determined by reflecting the transmission power by means of which the terminal has most recently transmitted a signal via an uplink anchor carrier and by reflecting the difference between channel environments of the uplink anchor carrier and the uplink non-anchor carrier, in a wireless communication system using a broadband formed by carrier aggregation. Consequently, the initial transmission power of the terminal is set as accurately as possible in the uplink non-anchor carrier, thereby preventing signal transmission delay and improving the reliability of received signals. | 08-09-2012 |
20120207052 | CONTROL AND DATA MULTIPLEXING IN COMMUNICATION SYSTEMS - Methods and apparatus are provided for a base station to assign to a UE communicating with the base station a number of coded control information symbols being transmitted with coded data information symbols during a transmission time interval by the UE. At least one offset value is assigned to the UE. A size of data is assigned to the UE. The base station transmits information regarding the at least one offset value to the UE. The base station transmits information regarding the size of data to the UE. The number of coded control information symbols assigned to the UE for transmission of control information is determined based on the size of data and the at least one offset value. The control information includes at least one of CQI, ACK/NAK, PMI, and RI. | 08-16-2012 |
20120207130 | METHOD AND APPARATUS OF HANDLING USER EQUIPMENT CATEGORY IN WIRELESS COMMUNICATION SYSTEM - A User Equipment (UE) category handling method and an apparatus for handling late version UE category attached to an early release version network in a Long Term Evolution (LTE) system are provided. A communication method includes transmitting a terminal capability report message including multiple terminal categories, receiving a Radio Resource Control (RRC) connection reconfiguration message including a terminal category to be used by the terminal according to serving base station of the terminal, and communicating with the network using the terminal category received from the network. The UE category handling method and apparatus of the present invention allows the UE to report a network-adaptive UE category, thereby avoiding soft buffer problem caused by version information mismatch and facilitating communication with the network without malfunctioning. | 08-16-2012 |
20120213157 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING SYSTEM INFORMATION IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus are provided for transmitting and receiving System Information (SI) in a mobile communication system. The method for receiving the SI by a User Equipment (UE) includes receiving, by the UE, at a fixedly scheduled sub-frame of a predetermined radio frame within a Primary Broadcast CHannel (P-BCH) transmission period, the SI including first partial bits of a System Frame Number (SFN), the first partial bits indicating a repeated value; and acquiring, by the UE, second partial bits of the SFN in the predetermined radio frame by decoding the P-BCH, the second partial bits indicating a different value. | 08-23-2012 |
20120213170 | MOBILE COMMUNICATION SYSTEM AND CHANNEL TRANSMISSION/RECEPTION METHOD THEREOF - A method and an apparatus for transmitting Hybrid Automatic Repeat reQuest (HARQ) Acknowledgement/Negative Acknowledgement (ACK/NACK) are provided. The HARQ ACK/NACK transmission method includes receiving a Physical Downlink Shared Channel (PDSCH) in a subframe of a first cell, identifying an ACK subframe for transmitting HARQ ACK/NACK corresponding to the PDSCH, and transmitting the HARQ ACK/NACK in the identified ACK subframe of a second cell. | 08-23-2012 |
20120214538 | USER EQUIPMENT AND POWER CONTROL METHOD FOR RANDOM ACCESS - An improved power control method and apparatus of a mobile terminal is provided for facilitating random access procedure in a mobile communication system based on a distributed antenna system. A method includes receiving, by the terminal, system information from a base station, the system information including transmit power information for transmitting a random access preamble; calculating a transmit power using the transmit power information; and transmitting the random access preamble using with the calculated transmit power. | 08-23-2012 |
20120230285 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL CHANNELS BY RESTRICTING A SET OF THE CONTROL CHANNELS IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus are provided for transmitting control information in a base station for a wireless communication system. The method includes transmitting, to a terminal, information associated with a number of Orthogonal Frequency Division Multiplexing (OFDM) symbols carrying control channels; determining a set of control channel candidates based on an IDentifier (ID) of the terminal; selecting at least one control channel candidate from among the set of control channel candidates; and transmitting the control information to the terminal through the selected at least one control channel candidate. Each control channel candidate included in the set of control channel candidates consists of one, two, four, or eight control channel elements (CCEs) existing in the OFDM symbols. | 09-13-2012 |
20120250625 | METHOD AND DEVICE FOR INDICATING WHETHER TERMINAL CARRIER AGGREGATION HAS BEEN ACTIVATED IN A CELLULAR WIRELESS COMMUNICATION SYSTEM - A method and device deactivate carrier aggregation and execute single carrier operation in a terminal, in a wireless communication system in which broadband is achieved by means of carrier aggregation. More specifically, in a terminal which is running a plurality of carriers, unnecessary power consumption in the terminal is prevented and additional screening events are minimized by defining physical layer signaling so as to make the terminal rapidly convert to running a single carrier. | 10-04-2012 |
20120257554 | METHOD AND APPARATUS FOR DEFINING TRANSCEIVING TIMING OF A PHYSICAL CHANNEL IN A TDD COMMUNICATION SYSTEM WHICH SUPPORTS CROSS-CARRIER SCHEDULING - The present invention relates to a method for defining, in a TDD wireless communication system in which broadband is configured by means of carrier aggregation, transceiving timing for a data channel and a control channel when cross-carrier scheduling is implemented. | 10-11-2012 |
20120269103 | APPARATUS AND METHOD FOR TRANSMITTING ACKNOWLEDGEMENT INFORMATION IN A TDD COMMUNICATION SYSTEM - Methods and apparatus are described for a User Equipment (UE) configured with multiple cells in the downlink of a time division duplex communication system to transmit HARQ-ACK information in a Physical Uplink Shared CHannel (PUSCH), to map HARQ-ACK bits transmitted in a PUSCH to information regarding correct or incorrect detections of data transport blocks in different cells and different transmission time intervals, and to provide a same understanding with an intended reception point of the information represented by HARQ-ACK bits the UE transmits in a PUSCH. | 10-25-2012 |
20120269160 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL INFORMATION TO RANDOMIZE INTER-CELL INTERFERENCE IN A MOBILE COMMUNICATION SYSTEM - Methods and apparatus are provided for transmitting control information in an SC-FDMA system. A UE generates a random cyclic shift value based on an SC-FDMA symbol index and a slot index. The UE cyclically shifts a sequence by the random cyclic shift value. The UE multiplies a control channel signal, including the control information, by the cyclically shifted sequence on an SC-FDMA symbol basis. The UE transmits the multiplied control channel signal in an SC-FDMA symbol to a Node B. | 10-25-2012 |
20120276895 | INITIAL ACCESS METHOD AND APPARATUS OF USER EQUIPMENT USING POWER REDUCTION REQUEST IN HETEROGENEOUS NETWORK - An initial access method of a user equipment (UE) and an apparatus performing the same are provided. The initial access method of a user equipment attempting access a macro cell base station in a network with which the macro cell base station and at least one Femto cell base station share, includes: receiving a cell ID from the macro cell base station or the Femto cell base station; transmitting an interference control request message to the Femto call base station when the received cell ID is a Femto cell ID; and receiving a macro cell ID provided from the macro cell base station when an interference control response message is received from the Femto cell base station to attempt an initial access. When a macro UE near to a Femto cell base station attempts to access a macro cell, it searches an ID of the macro cell through interference control from the Femto call base station to achieve initial access. | 11-01-2012 |
20120281604 | TRANSMISSION OF SOUNDING REFERENCE SIGNALS FROM A USER EQUIPMENT IN RESPONSE TO MULTIPLE REQUESTS - Methods and apparatus are provided for a User Equipment (UE) to transmit a Sounding Reference Signal (SRS). A first Downlink Control Information (DCI) format with an aperiodic SRS request field indicating aperiodic SRS transmission with first values for aperiodic SRS transmission parameters, is received. A second DCI format with an aperiodic SRS request field indicating aperiodic SRS transmission with second values for the aperiodic SRS transmission parameters, is received. The first values for the aperiodic SRS transmission parameters are compared with the second values for the aperiodic SRS transmission parameters. An aperiodic SRS is transmitted when the first values are identical to the second values. Transmission of the aperiodic SRS is suspended when the first values are not identical to the second values. | 11-08-2012 |
20120307819 | METHOD AND APPARATUS FOR INTERLEAVING DATA IN A MOBILE COMMUNICATION SYSTEM - An interleaving method to which time-first-mapping is applied in a mobile communication system is provided. The interleaving method includes writing coded bits into an interleaver on a row-by-row basis, and reading the coded bits written in the interleaver on a column-by-column basis, wherein the coded bits are written by groups having a size according to a modulation order | 12-06-2012 |
20120320846 | EXTENSION OF PHYSICAL DOWNLINK CONTROL SIGNALING IN A COMMUNICATION SYSTEM - Methods and apparatus are provided for a User Equipment (UE) to receive over a first set of resources a Physical Downlink Control CHannel (PDCCH) of a first type including Control Channel Elements (CCEs) of a first type, to receive over a second set of resources a PDCCH of a second type including CCEs of a second type, and to determine a resource for transmitting an acknowledgement signal in response to detecting the PDCCH of the first type or in response to detecting the PDCCH of the second type. | 12-20-2012 |
20120320863 | WIRELESS COMMUNICATION SYSTEM AND METHOD FOR RETRANSMISSION PROCESS THEREOF - The objective of the present invention is to control the HARQ process for two codewords assigned to each UE in downlink of the LTE-A system efficiently. In the proposed method, particularly when one of the two codewords is decoded successfully but the other is not in the HARQ process, the UE can be scheduled for both the retransmission and initial transmission by means of the control signal of PDCCH or ACK/NACK information of PHICHs. The proposed method is capable of reducing resource amount necessary for the control signal transmission without increasing the PDCCH decoding complexity of the UE. | 12-20-2012 |
20130114487 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DOWNLINK CONTROL INFORMATION IN A MOBILE COMMUNICATION SYSTEM SUPPORTING UPLINK PACKET DATA SERVICE - A method and apparatus for transmitting and receiving downlink control information in a mobile communication system supporting an uplink packet data service are provided. To transmit packet data in an HARQ mobile communication system, a second transceiver receives an RG as rate control information from a first transceiver. The second transceiver sets the allowed maximum data rate of an HARQ process to which the RG is applied to the allowed maximum data rate of an HARQ process previous to the HARQ process, if the RG indicates hold. The second transceiver transmits packet data within the set allowed maximum data rate to the first transceiver. | 05-09-2013 |
20130178220 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DOWNLINK DATA CHANNEL SIGNAL TRANSMISSION INFORMATION IN CELLULAR RADIO COMMUNICATION SYSTEM USING COOPERATIVE MULTI-POINT SCHEME - An apparatus and a method for transmitting/receiving downlink data channel signal transmission information in a cellular radio communication system using a Cooperative Multi-Point (COMP) scheme are provided. In the downlink data channel signal transmission information transmission method, a Base Station (BS) transmits downlink data channel signal transmission information including information related to Resource Elements (REs) scheduled for a downlink data channel signal transmission to a User Equipment (UE), and transmits downlink data channel signal non-transmission information including information related to REs through which a downlink data channel signal is not transmitted among the REs scheduled for the downlink data channel signal transmission to the UE. | 07-11-2013 |
20130182594 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING REFERENCE SIGNAL - An apparatus and a method for generation of channel state information in a wireless communication system are provided. The method includes transmitting, by an evolved Node B (eNB), a first reference signal to a plurality of User Equipments (UEs), receiving channel state information generated based on the first reference signal from the plurality of UEs, selecting candidate UEs to which wireless resources are to be allocated and transmitting second reference signals to the selected candidate UEs, receiving channel state information generated based on the second reference signals from the candidate UEs, and selecting final UEs, to which wireless resources are to be allocated, from the candidate UEs based on the channel state information generated based on the second reference signals, and transmitting control information for data reception to the selected final UEs. | 07-18-2013 |
20130195045 | REPORTING OF MULTIPLE PROCESSES FOR APERIODIC CHANNEL STATE INFORMATION - A method and an apparatus for transmitting Channel State Information (CSI) having a reporting mode and being transmitted from a User Equipment (UE) over a PUSCH transmission in an Uplink (UL) cell associated with a Downlink (DL) cell in response to the UE receiving a Downlink Control Information (DCI) format that includes a CSI request field indicating CSI transmission corresponding to one of CSI process sets associated with measurements of respective reference signals are provided. The method includes obtaining, from the CSI request field, an indication of a CSI process set for a CSI transmission; and transmitting the CSI for the CSI process set indicated by the CSI request field, wherein the CSI request field includes 2 bits of a first CSI process set having a first set of interpretations. | 08-01-2013 |
20130294389 | METHOD OF TRANSMITTING AND RECEIVING CONTROL INFORMATION BASED ON SPATIAL-MULTIPLEXING GAIN - A control information transmission and reception method based on a spatial-multiplexing gain, are provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined | 11-07-2013 |
20130315180 | GENERATION OF HARQ-ACK INFORMATION AND POWER CONTROL OF HARQ-ACK SIGNALS IN TDD SYSTEMS WITH DOWNLINK OF CARRIER AGGREGATION - Methods and apparatus are provided for a User Equipment (UE) configured to have multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system so as to determine a power of an acknowledgement signal that the UE transmits in a control channel and to determine a number of acknowledgement information bits that the UE multiplexes with data information bits in a data channel. A transmission power of the control signal is determined based on DL Assignment Index (DAI) Information Elements (IEs) in DL Scheduling Assignments (SAs) that the UE detects through multiple transmission time intervals and through the multiple configured DL cells. The number of acknowledgement information bits in the data channel is determined based on a DAI IE of an UpLink (UL) SA associated with the transmission of the data channel. | 11-28-2013 |
20130346827 | METHOD AND APPARATUS FOR INTERLEAVING DATA IN A MOBILE COMMUNICATION SYSTEM - An interleaving method in a mobile communication system is provided. The interleaving method includes encoding a plurality of bits to output encoded bits in a sequence, interleaving the encoded bits based on a modulation order to generate interleaved encoded bits comprising consecutive bits having a size based on the modulation order, the consecutive bits corresponding to consecutive bits of the encoded bits, scrambling the interleaved encoded bits with a scrambling code to generate scrambled bits, and modulating the scrambled bits based on the modulation order to output at least one symbol. | 12-26-2013 |
20140064208 | METHOD, APPARATUS, AND SYSTEM FOR TRANSMITTING AND RECEIVING INFORMATION OF AN UNCODED CHANNEL IN AN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM - A method apparatus and system for efficiently transmitting and receiving channels are provided in a wireless communication system based on Orthogonal Frequency Division Multiplexing (OFDM). A multiplexing scheme differs according to a channel when a transmitter transmits a packet data channel, a common control channel and a control channel designated for a particular user. Uncoded 1-bit information is broadly dispersed in frequency and time domains using multiplexing technology for maximizing diversity gain in a channel for transmitting information of at least one bit to a particular user like an acknowledgement (ACK) channel. The transmitter converts a sequence obtained by multiplexing multiple bits to be transmitted to a plurality of users to parallel signals, and broadly disperses the parallel signals in the time and frequency domains. When the uncoded 1-bit information is transmitted, reception reliability is improved because channel coding and transmission are efficiently performed using a small amount of resources. | 03-06-2014 |
20140092788 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN MOBILE COMMUNICATION SYSTEM - A data transceiving method of a terminal in a mobile communication system is provided. The data transceiving method includes receiving a Time Division Duplex (TDD) configuration modification message including TDD configuration modification time information from a base station, modifying a TDD configuration based on the TDD configuration modification time information, transmitting, to the base station, at least one of a data channel and a response channel by taking into consideration a transmission period between the data channel and the response channel. and the transmission period is determined for mapping first subframes for transmitting at least one of a data channel and a response channel before the TDD configuration modification, onto second subframes for transmitting at least one of a data channel and a response channel after the TDD configuration modification. | 04-03-2014 |
20140105049 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING CHANNEL STATE INFORMATION OF DOWNLINK CHANNEL IN MOBILE COMMUNICATION SYSTEM - A method for sending a Channel State Information (CSI) report for a Downlink (DL) channel by a User Equipment (UE) in a mobile communication system is provided. The method includes obtaining, from an evolved Node B (eNB), CSI report setting information including information about a transmission cycle and a transmission time for a CSI report, and Discontinuous Reception (DRX) setting information including information about an active time period in which signal transmission/reception is available in a DRX mode, determining whether the UE operates in the DRX mode, and if the UE is determined to operate in the DRX mode, adjusting the transmission time taking into account the CSI report setting information and the active time period, and sending the CSI report at the adjusted transmission time. | 04-17-2014 |
20140133343 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION FOR INTER-CELL COOPERATIVE TRANSMISSION IN WIRELESS COMMUNICATION CELLULAR SYSTEM - A method for transmitting feedback information for collaborative transmission in a cellular radio communication system is provided. The method includes receiving, from the base station, collaborative cell information indicating a plurality of collaborative cells, determining at least two preferred collaborative cells among the plurality of collaborative cells, generating feedback information including cell indicators for discriminating between the at least two preferred collaborative cells and the other cell, precoding matrix indicators for the at least two preferred collaborative cells, and channel quality indicators, and transmitting the feedback information via one of a control channel and a data channel. | 05-15-2014 |
20140140298 | METHOD FOR ALLOCATING RESOURCE IN LTE SYSTEM - A fractional Resource Block (RB) allocation method which enables resource allocation in a unit smaller than RB to improve the capacity of Voice over Internet Protocol (VoIP) in a Long Term Evolution (LTE) system is provided. The method includes generating modulation symbols streams by performing channel coding and modulation on transport blocks corresponding to first and second data to be transmitted to respective users, multiplexing the modulation symbols stream alternately in unit of two continuous modulation symbols, and transmitting the multiplexed modulation symbol stream as mapped to corresponding resource. A resource arrangement method allows different users to share the same resource without using a Space Domain Multiple Access (SDMA) and indicates fractional RB allocation. | 05-22-2014 |
20140211744 | SECONDARY CARRIER ACTIVATION/DEACTIVATION METHOD AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - A method for activating/deactivating secondary carriers of a User Equipment (UE) in a mobile communication system supporting carrier aggregation is provided. The method comprises, receiving a control message including an activation/deactivation Control Element (CE) in a first sub-frame from a Base station, identifying an activation command or a deactivation command of at least one secondary carrier based on the control message, determining whether a current sub-frame is a second sub-frame or not, performing at least one first operation for the at least one secondary carrier in a second sub-frame, and performing, when the activation/deactivation CE indicates deactivation of the at least one secondary carrier, at least one second operation for the at least one secondary carrier no later than the second sub-frame. | 07-31-2014 |
20140211745 | APPARATUS AND METHOD FOR RESOURCE ALLOCATION INFORMATION TRANSMISSION IN MOBILE COMMUNICATION SYSTEM - An apparatus and method for resource allocation information transmission is provided. The method includes determining a search space for use in a second frequency band using resource allocation information of a first process detected in a first frequency band, detecting resource allocation information using the search space in the second frequency band, and when failing to decode received data according to the resource allocation information detected in the second frequency band, re-detecting resource allocation information of the first process in the second frequency band in a first time interval using the search space without detecting the resource allocation information of the first process in the first frequency band. | 07-31-2014 |
20140247800 | METHOD AND DEVICE FOR MONITORING FREQUENCY DOMAIN-BASED WIRELESS LINK IN WIRELESS COMMUNICATION SYSTEM - The present disclosure relates to a technique for radio link monitoring in a wireless communication system, and to operation procedures of the base station and user equipment and a method for radio link quality evaluation on the basis of the technique. In the method, the user equipment divides the downlink channel bandwidth into multiple frequency ranges, measures channel states for each frequency range, and evaluates the radio link quality based on channel state measurement results. Thereafter, the user equipment sends frequency range quality information to the base station, which may then utilize the same for downlink resource allocation. Hence, it is possible to solve the problem of the existing scheme wherein the user equipment enters the physical layer problem detection state or the radio link failure state although a frequency range usable for service provisioning is present within the downlink channel bandwidth. | 09-04-2014 |
20140286208 | GENERATION OF HARQ-ACK INFORMATION AND POWER CONTROL OF HARQ-ACK SIGNALS IN TDD SYSTEMS WITH DOWNLINK OF CARRIER AGGREGATION - Methods and apparatus are provided for a User Equipment (UE) configured to have multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system so as to determine a power of an acknowledgement signal that the UE transmits in a control channel and to determine a number of acknowledgement information bits that the UE multiplexes with data information bits in a data channel. A transmission power of the control signal is determined based on DL Assignment Index (DAI) Information Elements (IEs) in DL Scheduling Assignments (SAs) that the UE detects through multiple transmission time intervals and through the multiple configured DL cells. The number of acknowledgement information bits in the data channel is determined based on a DAI IE of an UpLink (UL) SA associated with the transmission of the data channel. | 09-25-2014 |
20140307670 | RANDOM ACCESS METHOD AND APPARATUS OF UE IN MOBILE COMMUNICATION SYSTEM - A method and an apparatus for performing random access and uplink transmission of a User Equipment (UE) supporting Carrier Aggregation (CA) are provided. The method includes determining whether a Scheduling Request (SR) is pending, determining, when the SR is pending, whether an uplink transmission resource is available in a current Transmission Time Interval (TTI), determining, when the uplink transmission resource is not available, whether a Physical Uplink Control Channel (PUCCH) resource is configured for transmission of the SR, and initiating, when the PUCCH resource is not configured, a random access process in a primary cell. The random access method and apparatus of the present invention is advantageous to reduce the waste of transmission resources. | 10-16-2014 |
20140328284 | SECONDARY CARRIER ACTIVATION/DEACTIVATION METHOD AND APPARATUS FOR MOBILE COMMUNICATION SYSTEM SUPPORTING CARRIER AGGREGATION - A method for activating/deactivating secondary carriers of a User Equipment (UE) in a mobile communication system supporting carrier aggregation is provided. The method comprises, receiving a control message including an activation/deactivation Control Element (CE) in a first sub-frame from a Base station, identifying an activation command or a deactivation command of at least one secondary carrier based on the control message, determining whether a current sub-frame is a second sub-frame or not, performing at least one first operation for the at least one secondary carrier in a second sub-frame, and performing, when the activation/deactivation CE indicates deactivation of the at least one secondary carrier, at least one second operation for the at least one secondary carrier no later than the second sub-frame. | 11-06-2014 |