Patent application number | Description | Published |
20080240310 | METHOD FOR ESTIMATING AND COMPENSATING FREQUENCY OFFSET AND FREQUENCY OFFSET ESTIMATION MODULE - A method for estimating frequency offset is provided. First, a baseband signal with a preamble featuring quasi-periodic property is received. Next, the quasi-periodic property of the preamble of the received baseband signal is reconstructed by interpolation. Next, a frequency offset angle is estimated by using the reconstructed baseband signal. The accuracy of estimating frequency offset is increased because of better reconstructed quasi-periodic property of the preamble. | 10-02-2008 |
20090016464 | Method of and Generator for Generating Preamble Sequences in Communication Systems - A method forms a preamble sequence in a wireless communication system. The method comprises determining a value K related to a time-domain characteristic of the wireless communication system so that a time-domain preamble sequence includes a number of K waveforms similar in shape to one another having a linear phase shift, identifying a first preamble sequence for a first band, the first preamble sequence having a first length not dividable by K, identifying at least one second preamble sequence each for a second band, the at least one second preamble sequence having at least one second length, identifying the length of a third preamble sequence, the length of the third preamble sequence equal to a sum of the first length and the at least one second length, determining whether the time-domain characteristic is maintained when the one or more of the at least one second preamble sequence is concatenated with the first preamble sequence, modifying one or more of the at least one second preamble sequence if the time-domain characteristic is not maintained when concatenated, and forming the third preamble sequence by concatenating the first preamble sequence and the at least one second preamble sequence having one or more second preamble sequence modified. | 01-15-2009 |
20110014915 | METHOD FOR MOBILE COMMUNICATION AND SYSTEM THEREOF - A method for mobile communication and a system thereof are provided. The system for mobile communication includes a main base station and a plurality of sub-communication devices. The sub-communication device is one of a sub-base station and a user equipment. The sub-base stations and the user equipments are located in the macrocell of the main base station. The method includes the following steps. First, locations of the sub-communication devices are obtained. Then, the sub-communication devices are grouped based on the locations of the sub-communication devices. And, an allocation of resource blocks is obtained according to the grouping results. The sub-communication devices receive the allocation of resource blocks for control signaling and data transmission. And, the usage of same resource blocks are enabled by the sub-base station allocated in the same resource blocks in response to receipt of the allocation. | 01-20-2011 |
20110103269 | WIRELESS COMMUNICATION SYSTEM AND RELAY STATION AND WIRELESS COMMUNICATION DEVICE THEREOF - A wireless communication system and a relay station and a wireless communication device thereof are provided. The wireless communication system includes at least a base station, at least a relay station, and at least a wireless communication device. The relay station is wirelessly connected to the base station. The wireless communication device is wirelessly connected to the relay station. At least two uplinks of the wireless communication system are inband or on the same carrier, and at least two downlinks of the wireless communication system are outband or on different carriers. | 05-05-2011 |
20110158168 | SIGNAL INTERFERENCE HANDLING METHOD AND SYSTEM AND APPARATUS USING THE SAME - A signal interference handling method adapted to a cellular system, and a system and an apparatuses using the same are provided, where the cellar system includes a macro/micro cell base station (MBS), a home base station (HBS), and a MBS-served mobile station (m-MS), and the signal interference handling method includes steps. The m-MS detects whether there is mutual interference. The m-MS sends an interference mitigation (IM) request to the HBS if there is mutual interference. The HBS enters a low duty mode (LDM) after the HBS receives the IM request. | 06-30-2011 |
20110159882 | PILOT SELECTION METHOD, WIRELESS COMMUNICATION SYSTEM AND BASE STATION THEREOF - A pilot selection method adapted for selecting rank-2 pilot patterns for a macrocell advanced base station (ABS), a femtocell ABS and a non-macrocell and non-femtocell ABS is proposed along with a wireless communication system and a base station thereof. Different rank-2 pilot pattern is selected for a femtocell ABS from its overlay macrocell ABS and non-macrocell and non-femtocell ABS rank-2 pilot patterns. Another pilot selection method for selecting a rank-1 pilot pattern for a femtocell ABS co-located with at least a macrocell ABS is also proposed. Different rank-1 pilot pattern is selected for a femtocell ABS from its overlay macrocell ABSs using rank-1 and/or rank-2 pilot patterns, where some of the macrocell ABSs can use rank-2 pilot patterns and the rest of the macrocell ABSs just use rank-1 pilot patterns. Also, different rank-1 pilot pattern is selected for the femtocell ABS from its neighboring femtocell ABSs using rank-1 pilot patterns. | 06-30-2011 |
20130064316 | METHOD OF AND GENERATOR FOR GENERATING PREAMBLE SEQUENCES IN COMMUNICATION SYSTEMS - A method forms a preamble sequence in a wireless communication system. The method comprises determining a value K related to a time-domain characteristic of the wireless communication system so that a time-domain preamble sequence includes a number of K waveforms similar in shape to one another having a linear phase shift, identifying a first preamble sequence for a first band, the first preamble sequence having a first length not dividable by K, identifying at least one second preamble sequence each for a second band, the at least one second preamble sequence having at least one second length, identifying the length of a third preamble sequence, the length of the third preamble sequence equal to a sum of the first length and the at least one second length, determining whether the time-domain characteristic is maintained when the one or more of the at least one second preamble sequence is concatenated with the first preamble sequence, modifying one or more of the at least one second preamble sequence if the time-domain characteristic is not maintained when concatenated, and forming the third preamble sequence by concatenating the first preamble sequence and the at least one second preamble sequence having one or more second preamble sequence modified. | 03-14-2013 |
Patent application number | Description | Published |
20100322332 | Systems and Methods for Code Sequence Extension Over Transmission in Wireless Communication Environments - A transmitter for transmitting signals to a receiver is provided. The transmitter generates a padded code sequence comprising a plurality of symbols. The padded sequence is generated by padding the first symbol to the end of a code sequence. The padding method can be applied to Zadoff-Chu code, generalized chirp like code, CAZAC sequence to acquire extra code property, e.g. orthogonal in terms of differential detection. The padded code sequence can be allocated on sub-carriers of an OFDM symbol in frequency domain in increasing or decreasing order to resist linear phase shift due to time domain delay. If multiple OFDM symbols are used, the padded code sequence may be divided into multiple sections and each section may be padded in the same padding manner. Latter on, the transmitter transmits the padded code sequence to a receiver via an air interface. Upon receiving the padded code sequence via the air interface, the receiver may detect the padded sequence according to its structure, e.g. differential detection. | 12-23-2010 |
20110026498 | Data Communication Method, Wireless Communication System, and Base Station - The invention provides a wireless communication system. In one embodiment, the wireless communication system comprises a base station and user equipment. The base station transmits data to user equipment via a plurality of the component carriers comprising a series of data transmission cycles, interleaves starting time of a plurality of active periods of the component carriers in each data transmission cycle in an order, and sends control data to the user equipment via the component carriers during the active periods of the component carriers. The user equipment receives the control data via the component carriers during the active periods of the component carriers. | 02-03-2011 |
20110045858 | Systems and Methods for Network Entry Management - Systems and methods for network entry management are provided. The system includes a base station and a mobile station. The base station broadcasts synchronization channels (SCH) on multiple carriers, where the SCH may be hierarchical synchronization channel composed of primary synchronization channel (P-SCH) and secondary synchronization channel (S-SCH) which are used for timing, frequency synchronization, cell identification, etc. The carriers include at least a first carrier including at least one P-SCH and do not include a S-SCH. The mobile station scans the first carrier, and checks whether a P-SCH is broadcasted on the first carrier. If a P-SCH is broadcasted on the first carrier, the mobile station checks whether an S-SCH is broadcasted on the first carrier. If no S-SCH is broadcasted on the first carrier, the mobile station scans for a second carrier broadcasted by the base station. | 02-24-2011 |
20120069873 | Broadcasting System and Multi-Carrier Communication System - The invention provides a broadcasting system. In one embodiment, the broadcasting system comprises a transceiver and a processor. The transceiver carries out signal transmission via at least one fully configured carrier and at least one partially configured carrier. The processor controls the transceiver to broadcast a first preamble set via the at least one fully configured carrier, and controls the transceiver to broadcast a secondary preamble set via the at least one partially configured carrier, wherein the first preamble set comprises a primary preamble and at least one secondary preamble, and the second preamble set comprises no primary preamble and at least one secondary preamble. | 03-22-2012 |
20120100851 | Apparatuses, Systems, and Methods for Inbound Handover Enhancement - A wireless communications device with a wireless module and a controller module is provided. The wireless module performs wireless transmission and reception to and from a service network comprising at least two first home base stations having the same physical cell identity (PCI) or physical scrambling code (PSC), a plurality of second home base stations neighboring the first home base stations, and a macro base station. The controller module receives a message from the macro base station via the wireless module, requests the wireless module to detect a plurality of PCIs or PSCs respectively corresponding to the first home base stations and the second home base stations in response to the message, and transmits to the macro base station via the wireless module the detected PCIs or PSCs, prior to being handed over to the one of the first home base stations from the macro base station. | 04-26-2012 |
20120294262 | SYSTEMS AND METHODS FOR NETWORK ENTRY MANAGEMENT - A method for network entry management for use in a base station. The method includes steps of broadcasting multiple carriers, wherein the carriers are classified into fully configured carriers and partially configured carriers, the fully configured carrier includes at least one primary synchronization channel (P-SCH) and at least one secondary synchronization channel (S-SCH), and the partially configured carrier includes at least one P-SCH and does not include the S-SCH. | 11-22-2012 |
20120294263 | SYSTEMS AND METHODS FOR NETWORK ENTRY MANAGEMENT - A system for network entry management, including a mobile station scanning a first carrier within multiple carriers, checking whether a primary synchronization channel (P-SCH) is within the first carrier, and if a P-SCH is broadcasted on the first carrier, retrieving recommended information in the P-SCH, selecting a second carrier within the carriers based on the recommended information, and scanning the second carrier. A related method is also disclosed. | 11-22-2012 |
20130294378 | SYSTEMS AND METHODS FOR CODE SEQUENCE EXTENSION OVER TRANSMISSION IN WIRELESS COMMUNICATION ENVIRONMENTS - A transmitter for transmitting signals to a receiver is provided. The transmitter generates a padded code sequence including a plurality of symbols with the last symbol being a duplication of the first symbol, and transmit the padded code sequence with the symbols therein respectively corresponding to a plurality of first sub-carriers to the receiver via an air interface using a first antenna in a time period. Also, the transmitter duplicates the padded code sequence and transmits the duplicated padded code sequence with the symbols therein respectively corresponding to a plurality of second sub-carriers to the receiver via the air interface using a second antenna in the time period. | 11-07-2013 |
Patent application number | Description | Published |
20090016371 | METHOD FOR CONSTRUCTING FRAME STRUCTURES - A method of constructing a frame structure for data transmission, the method comprising generating a first section comprising data configured in a first format compatible with a first communication system, generating a second section following the first section, the second section comprising data configured in a second format compatible with a second communication system, wherein the second format is different from the first format, generating at least one non-data section containing information describing an aspect of data in at least one of the first section and the second section, and combining the first section, the second section and the at least one non-data section to form the frame structure. | 01-15-2009 |
20090077431 | DEVICES AND METHODS FOR BIT-LEVEL CODING AND DECODING OF TURBO CODES - A bit-level turbo code encoder is provided. The bit-level turbo code encoder is configured to receive a first input data sequence and generate a first output data sequence. The bit-level turbo code encoder includes a first non-binary convolutional code encoder, a bit-level interleaver, and a second non-binary convolutional code encoder. The first non-binary convolutional code encoder is configured to process the first input data sequence and generate a second output data sequence. The bit-level interleaver is configured to receive the first input data sequence as a first sequence and interleave the first sequence at bit level to generate a fourth sequence. The second non-binary convolutional code encoder is coupled with the bit-level interleaver and configured to receive the fourth sequence and process the fourth sequence to generate a third output data sequence. | 03-19-2009 |
20090100309 | METHODS AND DEVICES FOR ENCODING DATA IN COMMUNICATION SYSTEMS - Methods and apparatuses for encoding data in a wireless communication system including receiving an information sequence, and encoding the received information sequence to generate three subblocks of sequences. A first subblock of the three subblocks is the information sequence, a second subblock of the three subblocks is an encoded sequence, and a third subblock of the three subblocks is an interleaved and encoded sequence. The method further includes permuting the three subblocks of encoded sequences separately by subblock permutation, and continuously mapping the three subblocks into a circular buffer, the circular buffer including a first part, a second part, and a third part. Further, the method includes bit-selecting bits from the circular buffer, in a circular order corresponding to the first part, the second part, and the third part, to generate a first redundancy version and a second redundancy version, wherein bit-selection for a first redundancy version of the plurality of redundancy versions begins at a first position in the circular buffer, bit-selection for each successive redundancy version of the plurality of redundancy versions begins after a last position in the circular buffer corresponding to a previous redundancy version, and wherein, when a complete codeword is selected, bit-selection is offset from the first position by a fixed number of bits X. Finally, the method includes transmitting at least one redundancy version of the plurality of redundancy versions to at least one receiving device. | 04-16-2009 |
20090323838 | WIRELESS COMMUNICATION SYSTEMS AND METHODS USING REFERENCE SIGNALS - A method used in a wireless communication apparatus based on reference signals is provided. The method may include obtaining a plurality of pilot rules and obtaining radio channel information of a radio channel between the wireless communication apparatus and another wireless communication apparatus. The wireless communication apparatus may be in an area including at least one cell and using one or more data streams. Further, the method may include selecting applicable pilot rules from the plurality of pilot rules based on the radio channel information, creating at least one pilot structure to be used in the radio channel; and using the created at least one pilot structure to transmit data over the radio channel. | 12-31-2009 |
20100037115 | SYSTEM AND METHOD FOR DATA TRANSMISSION - A method for a receiver to receive data from a transmitter, the receiver including a plurality of buffers to support data retransmission by the transmitter. The method includes: receiving a data packet from the transmitter; determining whether or not at least a predetermined number of buffers are in use; and notifying the transmitter if it is determined that at least the predetermined number of buffers are in use. | 02-11-2010 |
20100174962 | SYSTEMS AND METHODS FOR DATA TRANSMISSION - A method for a receiver to provide a plurality of feedbacks to a transmitter, the plurality of feedbacks for use by the transmitter to determine data retransmission. The method includes: mapping the plurality of feedbacks to a sequence of symbols; and transmitting the sequence of symbols to the transmitter. | 07-08-2010 |
20110161771 | METHOD AND APPARATUS FOR PROVIDING RESOURCE UNIT BASED DATA BLOCK PARTITION - A method of providing resource unit based data block partitioning may include determining, for a bit stream to be encoded in a coding scheme including an upper layer coding and a physical layer coding, whether upper layer coding is enabled. The method may further include, in response to the upper layer coding being enabled, partitioning the bit stream into one or more blocks for forward error correction coding. The one or more blocks may have a block size determined based on a size of a resource unit. The resource unit size may correspond to one or more units predefined in the physical layer for the resource allocation. A corresponding apparatus is also provided. | 06-30-2011 |
20110195733 | Apparatus and Method for Resource Allocation in Wireless Communications - A method for a base station to allocate resources to a mobile station, the resources being included in one or more subbands each including a plurality of resource units, the method including: allocating a part of a first one of the subbands to the mobile station, the part including one or more resource units in the first one of the subbands; and indicating to the mobile station the allocated part of the first one of the subbands by indicating a resource allocation pattern corresponding to the allocated part of the first one of the subbands. | 08-11-2011 |
20120033589 | APPARATUS AND METHOD FOR CO-EXISTENCE BETWEEN DIFFERENT RADIO ACCESS TECHNOLOGIES - Apparatuses and methods are provided for co-existence between different first and second radio access technologies (RATs). The apparatus is configured or caused to perform operations, which the method may include. The operations may include selecting parameter(s) of a frame structure of the first RAT so as to facilitate its co-existence with the second RAT. These parameters may include a given length of a cyclic prefix of subframe(s) of the first frame structure, or the types of subframes of which the first frame structure is composed. The operations may additionally or alternatively include selecting, for the first RAT, the uplink and/or downlink duration(s) and/or transmit transition gap therebetween so as to satisfy a number of conditions that may define co-existence between the first and second RATs. Further, the operations may additionally or alternatively include structuring cyclic prefixes of the frame structures of the first RAT to reduce network search complexity. | 02-09-2012 |
Patent application number | Description | Published |
20110310838 | Method for Reference Signal Pattern Allocation and Related Communication Device - A method for reference signal pattern allocation for a eNodeB in a wireless communication system is disclosed. The method comprises allocating a plurality of physical resource blocks (PRBs) to at least one mobile device; and mapping a plurality of reference signal patterns to the PRBs according to a mapping rule. | 12-22-2011 |
20120039405 | Method of Designing Reference Signal Pattern And Related Communication Device - A method of designing a reference signal pattern for a network in a wireless communication system is disclosed. The method comprises transmitting a plurality of cell-specific reference signal (CRSs) in a subframe, the subframe comprising a plurality of resource elements that are divided in time across a plurality of subcarriers to form a plurality of orthogonal frequency division multiplexed (OFDM) symbols, each of the plurality of resource element occupying a predetermined amount of time on a respective one of the plurality of subcarriers. wherein, a first set of the plurality of CRSs is allocated to a first set of the plurality resource elements on a first symbol and a second symbol over a third subcarrier, a sixth subcarrier, a ninth subcarrier and a twelfth subcarrier. | 02-16-2012 |
20120063305 | PRIORITIZED RANDOM ACCESS METHOD - Prioritized random access methods are proposed. According to an embodiment, random access attempts are classified into the priority levels according to delay requirements, and adedicated random access opportunities are reserved for different priority levels. A congestion detecting mechanism is introduced for such dedicated ranging (random access) opportunities. When congestion is detected by the base station, parameters or configurations of random access can be dynamically or temporarily modified through random access response message. Furthermore, a prioritized contention resolution is introduced to guarantee a high priority access is processed earlier than a low priority access. According to another embodiment, another prioritized contention resolution is introduced to reduce the impact of random access of a low priority M2M device upon H2H traffic. | 03-15-2012 |
Patent application number | Description | Published |
20130107801 | DIRECT COMMUNICATION METHOD AND DIRECT COMMUNICATION DEVICE AND COORDINATOR DEVICE USING THE SAME | 05-02-2013 |
20130163649 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN A WIRELESS COMMUNICATION SYSTEM - The present invention discloses a transmission method and apparatus for a wireless communication system. The data transmission apparatus includes an encoder capable of encoding input data to generate first coded bits and second coded bits; a channel interleaver capable of interleaving said first coded bits and said second coded bits, to generate first interleaved coded bits and second interleaved coded bits; a partially swap unit capable of partially swapping said first interleaved coded bits to generate partially swapped first interleaved coded bits, and combining said partially swapped said first interleaved coded bits and said second interleaved coded bits to generate processed bits; a modulator capable of mapping said processed bits to modulation symbols in a predetermined modulation scheme; and a transmitter capable of transmitting the modulation symbols. Related methods are also disclosed. | 06-27-2013 |
20130170446 | METHOD AND APPARATUS FOR BROADCAST ASSISTANCE IN DIRECT COMMUNICATION SYSTEM - A method for broadcast assistance in a direct communication system and an apparatus using the same are disclosed. The proposed method includes the following steps. A coordinator receives a broadcast assistance request message from a plurality of broadcast devices. The coordinator transmits a broadcast assistance confirmation signal to the broadcast devices and broadcasts a resource indication signal including a resource allocation. The broadcast devices respectively broadcasts an information message to at least one listening device according to the resource allocation acquired from listening to the resource indication signal, and the at least one listening device listens to one of the information messages having a category of interest according to the resource allocation acquired from listening to the resource indication signal. | 07-04-2013 |
20130173396 | BROADCAST DEVICE, ASSISTING DEVICE, COORDINATING DEVICE, METHOD FOR CHARGING ASSISTING BROADCAST SERVICE AND CHARGING SERVER USING THE SAME, METHOD FOR COLLABORATIVE DIRECT COMMUNICATION AND COLLABORATIVE DIRECT COMMUNICATION SYSTEM USING THE SAME - A collaborative direct communication system including a broadcast device, at least one coordinating device and at least one assisting device is provided. The broadcast device is configured for transmitting an assistance transmission request based on a broadcast content which is to be transmitted. The at least one coordinating device is configured for transmitting a confirm signal to the broadcast device and broadcasting an assistance command in response to the assistance transmission request. The at least one assisting device is configured for providing an assisting broadcast service of transmitting the broadcast content in response to the assistance command. After the broadcast device receives the confirm signal, the broadcast device and the at least one assisting device broadcast the broadcast content. Furthermore, a collaborative direct communication method adapted to the coordinating device of the foregoing collaborative direct communication system is also provided. | 07-04-2013 |
20130286963 | RESOURCE MANAGEMENT METHOD AND APPARATUSES FOR DEVICE TO DEVICE COMMUNICATIONS - The present disclosure proposes a method for device to device communication and apparatuses using the same. More particularly, the present disclosure proposes a method and apparatuses to manage device to device (D2D) network resources based on maintain a user equipment (UE) network topology. The proposal includes a equipment (UE) requesting an authorization from the network for D2D communication in a licensed frequency spectrum, the UE would then receive through a control node or through another non-mobile UE the authorization which includes an identification (ID) information which allows the UE to engage in D2D communication in the license spectrum even when the UE is outside the range of the serving base station. | 10-31-2013 |
20130288645 | RESOURCE MANAGEMENT METHOD AND APPARATUSES FOR DEVICE TO DEVICE COMMUNICATIONS - The present disclosure proposes a method and apparatuses for geographical zone based radio resource management. The geographical zone based radio resource management method adapted for a control node would receive from a user equipment a request to communicate in a Device to Device (D2D) mode of communication. The control node would validate the user equipment according to a geographical zone in which the user equipment is located in response to the request of the user equipment to communicate in the D2D mode, wherein the geographical zone is formed by at least three control nodes. The control node would then notify the user equipment whether the user equipment may communicate in the D2D mode after the user equipment is authorized. | 10-31-2013 |
20140016504 | METHOD AND DEVICE FOR PROXIMITY-BASED COMMUNICATION - Methods and devices for communication in a wireless network are provided. One or more discovery devices transmits a request message for information to one or more target devices and receives an information related to the one or more target devices, so as to establish a communication link between at least a pair of discovery devices and target devices. A discovery period can be designated by the wireless network, and the discovery device can transmit to a server the request message and an information related to the one or more discovery devices prior to the discovery period. The target device can also transmit to the server the information related to the target device prior to the discovery period. | 01-16-2014 |
20150078297 | METHOD OF RESOURCE ALLOCATION FOR DEVICE TO DEVICE COMMUNICATION, USER EQUIPMENT USING THE SAME AND BASE STATION USING THE SAME - The present disclosure is directed to a method of resource allocation for device to device (D2D) communication, a user equipment using the same method, and a base station using the same method. In one of the exemplary embodiments, the disclosure would include a UE receiving a group of wireless signals, the UE determining from the group of wireless signals a first signal that has the highest power, the UE transmitting a second signal comprising the first signal that has the highest power to a base station, and the UE receiving a D2D resource allocation from the base station based on the second signal in response to transmitting the second signal. The first signal detected with the highest power may belong to a synchronous head. | 03-19-2015 |