Patent application number | Description | Published |
20090097447 | METHOD AND APPARATUS FOR ALLOCATING RESOURCES OF A CONTROL CHANNEL IN A MOBILE COMMUNICATION SYSTEM USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING - A method is provided for allocating resources of a control channel in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM). The method includes, when a time index and a frequency index of available Resource Elements (REs) are defined as l and k, respectively, dividing the available REs in a two-dimensional structure of (k, l); and time-first-allocating each RE to a plurality of RE groups while increasing the time index l for each frequency index k from an initial value up to a predetermined range. | 04-16-2009 |
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 |
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 |
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 |
20110243059 | APPARATUS AND METHOD FOR INTERLEAVING DATA IN A RELAY PHYSICAL DOWNLINK CONTROL CHANNEL (R-PDCCH) - A wireless network comprising a first base station operable to communicate with mobile stations and a plurality of relay stations for providing bi-directional communication between the first base station and a plurality of mobile stations. The first base station transmits a relay physical downlink control channel (R-PDCCH) in the downlink to the plurality of relay stations. The R-PDCCH comprises: i) a first search space comprising downlink (DL) grants associated with the plurality of relay stations; and ii) a second search space comprising uplink (UL) grants associated with the plurality of relay stations. | 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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
20130089067 | METHOD AND APPARATUS FOR OPERATING MULTI-BAND AND MULTI-CELL - Disclosed are a method and an apparatus for operating multi-band and multi-cell. An Enhanced Node B (eNB) transmits a synchronization channel and a broadcasting channel for narrow-band user equipments (UEs) through a first band narrower than a system band, the first band being located in a center band of the system band, and transmits a control channel for scheduling a data channel for a first narrow-band UE which is one of the narrow-band UEs through a second band equal to or wider than the first band, the second band not overlapping the first band within the system band. The first band is designed to be matched to a band where the synchronization channel and the broadcasting channel of a host cell using an entire system band are transmitted. | 04-11-2013 |
20130094442 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN WIRELESS COMMUNICATION SYSTEM - A User Equipment (UE) in a wireless communication system using a Coordinated Multi-Point transmission/reception (CoMP) scheme receives Downlink Control Information (DCI) including CoMP control information, determines a starting position of a data channel on wireless resources, based on starting position information of a data channel included in the CoMP control information and used in each of a plurality of cells, and receives data from the plurality of cells starting from the determined starting position. | 04-18-2013 |
20130107822 | SEARCH PROCESS FOR PHYSICAL DOWNLINK CONTROL CHANNELS IN A COMMUNICATION SYSTEM | 05-02-2013 |
20130107832 | FEEDBACK METHOD AND APPARATUS FOR COOPERATIVE MULTI-POINT COMMUNICATION IN COMMUNICATION SYSTEM | 05-02-2013 |
20130121249 | Method and apparatus for transmitting system information in a mobile communication system - A method and apparatus are provided for transmitting system information in a mobile communication system. The method includes configuring system information including first antenna configuration information and second antenna configuration information, and broadcasting the system information. The first antenna configuration information includes information about a number of antennas of a base station. | 05-16-2013 |
20130155974 | COMMUNICATION SUPPORT FOR LOW CAPABILITY DEVICES - Methods and apparatuses for transmitting and receiving signaling, by a User Equipment (UE) with reduced processing capabilities, to conserve power are provided. A method for transmitting from a network a Physical Downlink Shared CHannel (PDSCH) to a first User Equipment (UE) from a first class of UEs or to a second UE from a second class of UEs, includes transmitting a PDSCH to the first UE using a first bandwidth unit; and transmitting a PDSCH to the second UE using a second bandwidth unit, wherein the second bandwidth unit is smaller than the first bandwidth unit. | 06-20-2013 |
20130163569 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING REFERENCE SIGNAL TRANSMISSION INFORMATION IN CELLULAR RADIO COMMUNICATION SYSTEM USING COOPERATIVE MULTI-POINT SCHEME - An apparatus and method for transmitting/receiving reference signal transmission information in a cellular radio communication system using a Cooperative Multi-Point (CoMP) scheme is provided. In the reference signal transmission information transmission method, a Central Control Apparatus (CCA) transmits measurement set information related to a measurement set including at least one reference signal resource unit through which a reference signal is transmitted, and reference signal transmission timing information including information related to a timing at which the reference signal is transmitted to a User Equipment (UE), and transmits reference signal non-transmission timing information including information related to a timing at which the reference signal is not transmitted through the reference signal resource unit to the UE. | 06-27-2013 |
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 |
20130195041 | METHOD AND APPARATUS FOR SCHEDULING COMMUNICATION FOR LOW CAPABILITY DEVICES - Methods and apparatus are described for a User Equipment (UE) with reduced processing capabilities (e.g., Machine Type Communication (MTC) UE) to transmit and receive signaling are provided. The Downlink Control Information (DCI) formats scheduling a transmission of a Physical Uplink Shared CHannel (PUSCH) or a reception of a Physical Downlink Shared CHannel (PDSCH) are designed and have a smaller size than respective DCI formats for conventional UEs. DCI formats scheduling PUSCHs to or PDSCHs for a group of MTC UEs are also designed and can have a same size as DCI formats scheduling PUSCH or PDSCH for an individual MTC UE. | 08-01-2013 |
20130215819 | 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 is provided. The method includes generating resource block assignment information related to resource blocks allocated to the relay; transmitting resource information comprising the resource block assignment information; and transmitting a control channel according to the resource information. | 08-22-2013 |
20130294366 | REFERENCE SIGNALS AND COMMON SEARCH SPACE FOR ENHANCED CONTROL CHANNELS - Methods and apparatuses for a User Equipment (UE) to receive signaling of UE-common Downlink Control Information (DCI) in a set of Physical Resource Blocks (PRBs) over a Transmission Time Interval (TTI) are provided. The UE demodulates UE-common DCI using a Reference Signal (RS) that is scrambled by a UE-common scrambling sequence. The UE may assume that RS having a same precoding is transmitted in the set of PRBs over different TTIs. The UE may determine the scrambling sequence implicitly from an identity of a point transmitting the UE-common DCI or explicitly by higher layer signaling. The UE may determine the PRBs of UE-common DCI transmission by broadcast signaling or by higher layer signaling. | 11-07-2013 |
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 |
20130301492 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING FRAME CONFIGURATION INFORMATION IN TDD WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting Time Division Duplexing (TDD) configuration information by an evolved Node B (eNB) in a TDD wireless communication system are provided. The method includes determining a changed TDD configuration indicating a transmission direction of a plurality of sub-frames constituting a frame; generating a system information element including dynamic TDD configuration information indicating the changed TDD configuration; transmitting a system information block including the dynamic TDD configuration information; and sending a Media Access Control (MAC) message including information indicating whether a change in TDD configuration is activated. | 11-14-2013 |
20130336300 | MOBILE COMMUNICATION SYSTEM AND DATA TRANSMISSION METHOD THEREOF - A data transmission method and apparatus is provided for transmitting UL grant or ACK/NACK at flexible subframes in a Time Division Duplex (TDD) system. The data transmission method of a base station according to the present invention includes configuring subframes irrelevant to Hybrid Automatic Repeat reQuest (HARQ) process as flexible subframes; scheduling uplink transmission at the flexible subframes with uplink grant; receiving uplink data transmitted by a terminal at the flexible subframes as scheduled; and transmitting, when decoding the uplink data fails, HARQ acknowledgement/negative acknowledgement (ACK/NACK) or uplink grant to request retransmission of the uplink data. The data transmission method of the present invention is capable of utilizing flexible subframes for uplink transmission without influencing the uplink HARQ process associated with the downlink subframes configured as flexible subframes. | 12-19-2013 |
20130343333 | 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. | 12-26-2013 |
20140064214 | ADAPTING A NUMBER OF AGGREGATION LEVELS FOR CONTROL CHANNEL ELEMENTS - Methods and apparatus are described for a base station to transmit and for a User Equipment (UE) to detect a Physical Downlink Control CHannel (PDCCH) conveying a Downlink Control Information (DCI) format scheduling data reception or data transmission by the UE. The base station transmits a PDCCH and the UE decodes candidate PDCCHs using a number of Control Channel Elements (CCEs) from a first set of CCEs for a first DCI format and using a number of CCEs from a second set of CCEs for a second DCI format depending on a maximum code rate for the DCI format transmission or on a scheduling bandwidth. | 03-06-2014 |
20140071915 | MULTIPLEXING RESOURCE ELEMENT GROUPS FOR CONTROL CHANNEL ELEMENTS OF CONTROL CHANNELS - Methods and apparatus are described for forming Control Channel Elements (CCEs) from Resource Element Groups (REGs) that are located in one or more Physical Resource Block (PRB) pairs from a set of PRB pairs, for determining a first symbol in a Transmission Time Interval (TTI) for a Physical Downlink Shared Channel (PDSCH), and for determining whether the PDSCH includes all PRB pairs indicated by a respective PDCCH scheduling the PDSCH. | 03-13-2014 |
20140071935 | MULTIPLEXING RESOURCE ELEMENT GROUPS FOR CONTROL CHANNEL ELEMENTS OF CONTROL CHANNELS - Methods and apparatus are described for forming Control Channel Elements (CCEs) from Resource Element Groups (REGs) that are located in one or more Physical Resource Block (PRB) pairs from a set of PRB pairs, for determining a first symbol in a Transmission Time Interval (TTI) for a Physical Downlink Shared Channel (PDSCH), and for determining whether the PDSCH includes all PRB pairs indicated by a respective PDCCH scheduling the PDSCH. | 03-13-2014 |
20140086113 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL CHANNEL IN DYNAMIC TIME DIVISION DUPLEX SYSTEM - A method and system for transmitting and receiving a control channel in a dynamic Time Division Duplex (TDD) system. Upon receiving a control signal DCI for a first Hybrid Automatic Retransmission Request (HARQ) process from a Node B, a User Equipment (UE) determines whether TDD configuration is changed in a radio frame to which the DCI is to be applied. If the TDD configuration is changed, the UE determines from the DCI whether retransmission for the first HARQ process is required. If the retransmission required, the UE interprets some bits of a Modulation and Coding Scheme (MCS) field in the DCI as a target HARQ process index for the first HARQ process. As a result, the most is made of available UL data channel resources, contributing to an increase in the capacity of the dynamic TDD system and a reduction in packet delays of the UE. | 03-27-2014 |
20140086127 | METHOD AND APPARATUS FOR USING A PLURALITY OF CELLS IN COMMUNICATION SYSTEM - Methods and apparatus for using a plurality of cells by an evolved NodeB (eNB) in a communication system are provided. A first eNB, which manages a first cell and is providing a communication service to a User Equipment (UE) located in the first cell, determines to provide the communication service to the UE together with a second cell of a second eNB, which neighbors the UE. A cell addition request message, making a request for aggregation of the first cell and the second cell, is transmitted to the second eNB to provide the communication service. When a cell addition response message, accepting the request for aggregation of the first cell and the second cell, is received from the second eNB, a cell activation request message, making a request for activation of the second cell, is transmitted to the second eNB. | 03-27-2014 |
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 |
20140161094 | METHOD AND APPARATUS FOR TRANSMITTING DOWNLINK HYBRID AUTOMATIC REPEAT REQUEST INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus and for transmitting downlink Hybrid Automatic Repeat request (HARQ) information in a wireless communication system are provided. In the method, at least one Physical Resource Block (PRB) for transmitting a Physical HARQ Indicator Channel (PHICH) signal is set among all PRBs forming an available frequency band. A PHICH resource is determined within the set at least one PRB. A PHICH signal is transmitted using the determined PHICH resource. | 06-12-2014 |
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 |
20140286176 | APPARATUS AND METHOD FOR RADIO LINK MONITORING IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for radio link monitoring in a wireless communication system are provided, in which a transmission point communicating with a network where a Base Station (BS) and at least one Remote Radio Head (RRH) coexist within a cell receives Reference Signal Configuration Information (RSCI) from the network to which the transmission point belongs, receives RSs of at least one RS type indicated by the received RSCI from the BS and the at least one RRH that coexist within the cell, and performs radio link monitoring using the received RSs of the at least one RS type. | 09-25-2014 |
20140286263 | 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. | 09-25-2014 |
20140307597 | METHOD AND APPARATUS FOR CONTROLLING TRANSCEIVING OF PHYSICAL CHANNELS IN TIME DIVISION DUPLEX COMMUNICATION SYSTEM - Disclosed are a method and an apparatus for controlling the transceiving of physical channels in a time division duplex (TDD) communication system. The method comprises: a step of determining whether a point of time of HARQ ACK/NACK transmission in component carrier #1 and a point of time of the transmission of another signal in component carrier #2 coupled with the component carrier #1 are overlapped with each other; and a step of preferentially transmitting or receiving a HARQ ACK/NACK signal when the points of time of transmission are overlapped with each other. Thus, the method and the apparatus of the present invention may prevent transceiving error or transmission delay of data or a control channel. | 10-16-2014 |
20140321396 | CHANNEL STATE INFORMATION REQUEST/FEEDBACK METHOD AND APPARATUS - Methods and apparatuses are provided for Channel State Information (CSI) feedback. An Uplink (UL) grant is received from a Node B. Information included in the UL grant is identified. If the information is mapped to at least one DownLink (DL) Component Carrier (CC) based on configuration information relating to at least one set including the at least one DL CC, at least one CSI corresponding to the at least one DL CC is generated. The generated at least one CSI is transmitted to the Node B. | 10-30-2014 |
20140341089 | Interference measurement method and apparatus for controlling inter-cell interference in wireless communication system - The present disclosure relates to an interference measurement method and apparatus for controlling inter-cell interference in a Time Division Duplex (TDD) radio communication system and, in particular, to a technology for a base station to configure a radio frame capable of controlling interference with adjacent base stations and to measure interference based on the radio frame configured as such. In an embodiment of the present disclosure, the first base station sends the second base station the first radio frame configuration information and the second radio frame configuration information including a subset of uplink subframes of the first radio frame configuration. The second base station configures the intersection of uplink subframes of the first and second radio frame configurations into the first interference measurement subframe set and difference of the sets of the subframes of the respective first and second radio frame configurations into the second interference measurement subframe set. The second base station measures uplink interference signals of the neighbor cell during the first interference measurement subframe set and the downlink interference signal of the neighbor cell during the second interference measurement set and transmits the measurement result to the first base station. Through this method, the base station is capable of predicting uplink coverage of the neighbor cell during the first interference measurement subframe set and the downlink coverage of the neighbor cell during the second interference measurement subframe set for controlling inter-cell interference. | 11-20-2014 |
20140348144 | TERMINAL SIGNAL TRANSMISSION TIMING RANDOMISATION METHOD AND DEVICE IN WIRELESS COMMUNICATION SYSTEM - The present disclosure relates to a terminal signal transmission timing randomisation method and device in a wireless communication system, and the terminal signal transmission method in a wireless communication system of the present disclosure comprises the steps of: receiving, from a base station, setting information for randomising transmission timing with respect to a signal transmitted by a terminal; determining the transmission timing for the signal in accordance with the setting information; and transmitting the signal to the base station in accordance with the determined transmission timing. | 11-27-2014 |
20140376482 | METHOD AND DEVICE FOR TRANSMITTING SOUNDING REFERENCE SIGNAL IN COOPERATIVE COMMUNICATION SYSTEM - Disclosed is a method and device for transmitting a sounding reference signal (SRS) in a cooperative communication system. The method comprises the steps of: receiving, from a macro base station, SRS resource information indicating transmission resources of an SRS to be transmitted by a user equipment (UE); transmitting the SRS and uplink data on the basis of a UE-specific SRS subframe configuration included in the SRS resource information when the SRS resource information includes information on the UE-specific SRS subframe configuration; and transmitting the SRS and the uplink data on the basis of a pre-stored cell-specific SRS subframe configuration when the SRS resource information does not include the information on the UE-specific SRS subframe configuration. When a destination of the SRS to be transmitted by the UE is selected as a base station related to the macro base station, the SRS resource information includes information on the UE-specific SRS subframe configuration of the base station selected as the destination of the SRS. | 12-25-2014 |
20150016291 | METHOD AND APPARATUS FOR MEASURING MU-MIMO INTERFERENCE IN MOBILE COMMUNICATION SYSTEM - One or more embodiments discloses a method of measuring interference by an evolved NodeB and an eNB device. The method includes configuring one or more first type interference measurement resources in a User Equipment (UE). The method also includes transmitting signals for a plurality of UEs within a cell range of the eNB to the one or more first type interference measurement resources. The method also includes receiving channel status information generated in accordance with a signal received in the one or more first type interference measurement resources. | 01-15-2015 |
20150023231 | METHOD AND APPARATUS FOR TRANSCEIVING CHANNEL RELATED TO TERMINAL THAT SUPPORTS HALF DUPLEX TRANSMISSION IN MOBILE COMMUNICATION SYSTEM - Disclosed are a method and an apparatus for transceiving a channel related to a terminal that supports half duplex transmission in a mobile communication system. The terminal receives scheduling information on multi-carriers having different TDD configurations from a base station, determines whether to receive a downlink channel for a plurality of different subframes of each multi-carrier including at least one special subframe, and transceives a channel to/from the base station depending on whether the downlink channel is received or not. | 01-22-2015 |
20150043673 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING FEEDBACK INFORMATION IN MOBILE COMMUNICATION SYSTEM BASED ON 2 DIMENSIONAL MASSIVE MIMO - A feedback information transmission/reception method for use in a mobile communication system is provided. The feedback information transmission method includes receiving configuration information on at least two reference signals and feedback configuration information for use in generating feedback information based on the at least two reference signals from a base station, receiving the at least two reference signals from the base station, measuring the at least two reference signals received, generating the feedback information based on the measurement result according to the feedback configuration information, and transmitting the feedback information to the base station. | 02-12-2015 |
20150085802 | EXTENSION OF PHYSICAL DOWNLINK CONTROL SIGNALING IN A COMMUNICATION SYSTEM - Methods and apparatus are provided for the transmission of physical downlink control signaling. In one method, a User Equipment (UE) receives information associated with a physical resource block (PRB) for enhanced physical downlink control channel (EPDCCH) from a base station. Based on either first information received on physical control format indicator channel (PCFICH) or second information received on higher layer signaling, the UE determines a starting orthogonal frequency division multiple (OFDM) symbol on which EPDCCH transmission starts. The UE receives control information on the EPDDCH based on the information associated with the PRB and the determined starting OFDM symbol. | 03-26-2015 |