Patent application number | Description | Published |
20090262671 | APPARATUS AND METHOD FOR ALLOCATING UPLINK RESOURCES IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for allocating an uplink resource in a wireless communication system that uses a Half duplex-Frequency Division Duplex (H-FDD) scheme. The apparatus includes a controller and a message generator. The controller determines a resource allocation scheme enabling an F-FDD mobile station to allocate uplink bursts to a first group and a second group using one MAP message. The message generator generates a MAP message indicating the resource allocation scheme determined by the controller. | 10-22-2009 |
20090274227 | APPARATUSES AND METHODS FOR TRANSMISSION AND RECEPTION IN A CODEBOOK BASED CLOSED-LOOP (CL)-MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) SYSTEM - Apparatuses and methods for transmission and reception in a Closed-Loop (CL)-Multiple Input Multiple Output (MIMO) system are provided. A codebook generation method includes determining weight vectors v | 11-05-2009 |
20100014462 | METHOD AND APPARATUS FOR RECOGNIZING MULTICAST AND BROADCAST SERVICE REGION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for recognizing a Multicast and Broadcast Service (MBS) region in a broadband wireless communication system are provided. In the method, whether a next MBS MAP message transmission point of a first frame and an MBS data burst transmission point indicated by MBS burst assignment information of a second frame match with each other in a third frame is determined. When matching with each other in the third frame, a control message including information for determining a starting point of an MBS region is generated. The generated control message is transmitted during one of the first and second frames. | 01-21-2010 |
20110090884 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING SYSTEM INFORMATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmission/reception of system information in a broadband wireless communication system are provided. An operation of a Base Station (BS) in a broadband wireless communication system includes determining whether to apply a system configuration corresponding to a previous value of a Secondary-Super Frame Header (S-SFH) change count changed according to update of system information and, when applying the system configuration corresponding to the previous value of the S-SFH change count, setting a parameter representing the applied system configuration to a first value and, when applying a system configuration corresponding to a current value of the S-SFH change count, setting the parameter to a second value, and transmitting a Primary-Super Frame Header (P-SFH) including the S-SFH change count and the parameter set to the first value or the second value. | 04-21-2011 |
20110093757 | METHOD AND APPARATUS FOR HANDLING ERRORS IN A SYNCHRONOUS UL HARQ PROCESS - An apparatus and method for handling an error that may occur during a HARQ process are provided. The method includes determining that an UpLink (UL) HARQ burst has been transmitted on a first resource, determining if the UL HARQ burst has been received, determining if the first resource for UL HARQ burst transmission needs to be changed, and transmitting feedback information regarding receipt of the UL HARQ burst and whether the first resource needs to be changed. | 04-21-2011 |
20110110301 | APPARATUS AND METHOD FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for transmitting control information in a small base station of a wireless communication system are provided. In the method, when the small base station operates in a Low Duty operation Mode (LDM) in a superframe, a control signal including LDM operation information is generated. Only a subframe via which a preamble, a control signal including the LDM operation information, and a SuperFrame Header (SFH) are transmitted is transmitted during the superframe. When the small base station operates in a normal operation mode in a superframe, at least one of the control information and data is transmitted via at least one subframe of the superframe. | 05-12-2011 |
20110296270 | Apparatus and method for resource segmentation in wireless communication system - An apparatus and a method segment an allocated resource in data transmission in a wireless communication system. When a size of transmission data is large, the data information bit is distributed to one or more forward error correction (FEC) blocks with consideration of a size of the data information bit. A number of data tones is determined based on control information with respect to each of the one or more FEC blocks. The data information bit distributed to the one or more FEC blocks is mapped into a data tone with consideration of the number of data tones determined for each of the one or more FEC blocks. | 12-01-2011 |
20110305214 | APPARATUS AND METHOD FOR CAPABILITY NEGOTIATION FOR HYBRID AUTOMATIC REPEAT REQUEST PARAMETER IN BROADBAND WIRELESS COMMUNICATION SYSTEM - A technique for supporting newly defined Hybrid Automatic Repeat reQuest (HARQ) categories without an occurrence of an interpretation error when using a legacy Mobile Station (MS) and a legacy Base Station (BS) in a broadband wireless communication system is provided. A method of transmitting a capability negotiation message includes determining an HARQ parameter set to be allocated, setting a value of a second field for informing whether to indicate an HARQ parameter set which corresponds to an index greater than a maximum value that can be indicated by using a first field for indicating an index of the HARQ parameter set, and transmitting the capability negotiation message including the second field. | 12-15-2011 |
20110310761 | APPARATUS AND METHOD FOR TRANSMITTING BROADCAST CHANNEL IN BROADBAND WIRELESS ACCESS SYSTEM - To transmit and receive system information of a base station in a broadband wireless access system, operations of the base station include determining transmission periodicities of a plurality of system information subpackets periodically transmitted in a periodicity of two or more superframes, determining transmission offsets of the subpackets based on the transmission periodicities using a predefined rule for determining a transmission periodicity and a transmission offset, and transmitting the subpackets respectively according to the transmission periodicities and the transmission offsets. | 12-22-2011 |
20120327900 | APPARATUS AND METHOD FOR PROVIDING PREAMBLE INFORMATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for providing preamble information in a wireless communication system are provided. The method of a Base Station (BS) of a first system for providing neighbor BS information of a second system in a communication environment covering the first system and the second system together includes generating a message comprising information indicating a superframe boundary of a neighbor BS of the second system, and transmitting the message comprising the information indicating the superframe boundary to a Mobile Station (MS). | 12-27-2012 |
20130045690 | APPARATUS AND METHOD FOR SUPPORTING MULTI-ANTENNA TRANSMISSION IN BEAMFORMED WIRELESS COMMUNICATION SYSTEM - An apparatus and method for supporting diversity in a beamformed wireless communication system. A method for transmitting a signal in a transmit end includes determining Receive (Rx) beamforming capability information of a receive end, receiving channel information on at least one Transmit (Tx) beam pattern from the receive end, determining at least one Tx beam pattern for transmitting a signal to the receive end, in consideration of Rx beamforming support information of the receive end and the channel information on the at least one Tx beam pattern, and transmitting a signal to the receive end using the at least one Tx beam pattern for transmitting the signal to the receive end. | 02-21-2013 |
20130072243 | METHOD AND APPARATUS FOR BEAM ALLOCATION IN WIRELESS COMMUNICATION SYSTEM - A beam allocation method of a Base Station (BS) in a wireless communication system is provided. The method includes transmitting a reference signal to a Mobile Station (MS) using a plurality of downlink transmit (Tx) beams, receiving information of a plurality of candidate downlink Tx beams determined by the MS in response to the received reference signal, selecting at least one downlink Tx beam from the plurality of candidate downlink Tx beams according to a predefined rule, generating control information for burst transmission, comprising the selected at least one downlink Tx beam information, transmitting the control information to the MS using the selected at least one downlink Tx beam, and transmitting a data burst based on Tx beam information included in the control information. | 03-21-2013 |
20130072247 | APPARATUS AND METHOD FOR OPERATING MULTIPLE BEAMFORMING TRANSCEIVER IN WIRELESS COMMUNICATION SYSTEM - A method for operating a base station in a wireless communication system in order to support a plurality of propagation characteristics is provided. The method includes allocating resource periods for respective propagation characteristics, transmitting system information including information on the propagation characteristics, transmitting a reference signal with the propagation characteristic corresponding to the relevant resource period through at least one of the resource periods, and receiving feedback information determining channel qualities for all of the propagation characteristics. | 03-21-2013 |
20130172002 | BEAMFORMING METHOD AND APPARATUS FOR ACQUIRING TRANSMISSION BEAM DIVERSITY IN A WIRELESS COMMUNICATION SYSTEM - A data transmission method for a base station to acquire transmission beam diversity in a wireless communication system is provided. The data transmission method includes selecting at least two transmission beams to be used for data transmission from among multiple transmission beams corresponding to transmission beam information, if receiving the transmission beam information regarding the multiple transmission beams from a terminal, and transmitting data encoded with a predetermined orthogonalization code to the terminal via the selected at least two transmission beams. | 07-04-2013 |
20130178219 | METHOD AND APPARATUS FOR PROVIDING COMMUNICATION SERVICE TO MOBILE STATION BY MULTIPLE BASE STATIONS IN COOPERATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for providing a service to a Mobile Station (MS) by a plurality of Base Stations (BSs) operating in cooperation in a wireless communication system are provided. The method includes configuring, by a master BS, a first cooperative cell including at least one slave BS, sending a resource request message for requesting resource allocation to the at least one slave BS included in the first cooperative cell, receiving, from each of the at least one slave BS, a resource request response message including resource approval control results for the resource allocation request, changing member BSs constituting the first cooperative cell based on the resource request response message, and allocating resources to an MS that is served in the first cooperative cell. | 07-11-2013 |
20130201938 | METHOD AND APPARATUS FOR ALLOCATING UPLINK RESOURCES IN BEAMFORMING-BASED WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for requesting Uplink (UL) resource allocation in a beamforming-based wireless communication system are provided. A Mobile Station (MS) acquires UL beam pair information indicating a best MS transmit beam and a best Base Station (BS) receive beam for UL transmission, determines a best BS transmit beam for Downlink (DL) reception, selects a Bandwidth Request (BR) code and a BR channel from available BR codes and a designated BR transmit resource, wherein at least one of the BR code and the BR channel is mapped to at least one of the best BS receive beam and the best BS transmit beam, and transmits the selected BR code to a BS over the selected BR channel. The BS allocates a UL resource for transmission of a BR message and UL data considering the best BS receive beam. | 08-08-2013 |
20130215941 | BUFFER MANAGEMENT DEVICE AND METHOD FOR HYBRID AUTOMATIC REPEAT REQUESTS IN A WIRELESS COMMUNICATION SYSTEM - Effective management of a Hybrid-Automatic Repeat reQuest (HARQ) buffer in a wireless communication system is provided. A receiving terminal includes a first memory for storing Log Likelihood Ratio (LLR) values of at least one data block comprised in a received HARQ burst in a first memory, a channel decoder for decoding the at least one data block by using the LLR values, an error detection unit for detecting whether there are errors in the decoded at least one data block, and a second memory for storing at least one error-free data block in a decoded state among the data blocks in a second memory. | 08-22-2013 |
20130260772 | MULTI-TIER CLUSTERING APPARATUS IN WIRELESS COMMUNICATION SYSTEM AND METHOD THEREOF - An apparatus and a method for configuring and managing/controlling a cluster, which is a set of Base Stations (BSs) for transmitting signals cooperatively, are provided. The method includes broadcasting cluster set information indicating information about a plurality of clusters including a serving BS to a User Equipment (UE), receiving a report of information about Received Signal Strength Indicators (RSSIs) of control signals transmitted from BSs included in the plurality of clusters from the UE, and assigning any one of the plurality of clusters to a cluster for servicing the UE based on the information about the RSSIs of the control signals. | 10-03-2013 |
20130301454 | COMMUNICATION METHOD AND APPARATUS USING ANALOG AND DIGITAL HYBRID BEAMFORMING - A communication method and apparatus using analog and digital hybrid beamforming are provided. The method includes receiving a first message including a measurement and selection condition for hybrid beamforming from a Base Station (BS), measuring channels of a plurality of BS transmission beams, selecting at least one BS transmission beam based on channel measurements, transmitting report information about the selected at least one BS transmission beam to the BS, receiving from the BS a second message, estimating an effective channel matrix for the selected final BS transmission beam according to the measurement and report condition, determining feedback information for digital beamforming of the BS based on the effective channel matrix, transmitting the determined feedback information to the BS, and receiving a data burst from the BS according to a Multiple Input Multiple Output (MIMO) mode and/or a configuration scheduled based on the feedback information. | 11-14-2013 |
20130308569 | COORDINATED COMMUNICATION IN COMMUNICATION SYSTEM - A method of supporting communication of a terminal in a first base station of a beamforming system is provided. The method includes determining an uplink control channel through which both the first base station and at least one second base station are able to receive signals, through cooperation with the at least one second base station, the first base station and the at least one second base station belonging to a cloud cell, and transmitting to the terminal information on the determined uplink control channel and frame information to establish relationships with the base stations included in the cloud cell for each transmit frame of a signal to be transmitted to the terminal from the base stations. | 11-21-2013 |
20130343303 | COMMUNICATION METHOD AND APPARATUS USING BEAMFORMING IN A WIRELESS COMMUNICATION SYSTEM - A communication method and an apparatus using beamforming in a wireless communication system are provided. The communication method includes determining a candidate user set including one or more Mobile Stations (MSs), for Multiple User-Multiple Input Multiple Output (MU-MIMO) transmission, transmitting beam information indicating best Base Station (BS) transmission beams of the MSs of the candidate user set to the MSs of the candidate user set, receiving Precoding Matrix Index (PMI) information indicating a PMI to be used for baseband precoding from each of the MSs of the candidate user set, the PMI information being determined based on the beam information, and transmitting a signal precoded based on the PMI information to at least one MS. | 12-26-2013 |
20140126449 | APPARATUS AND METHOD FOR TRANSMITTING SIGNAL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for transmitting control information in a small base station of a wireless communication system are provided. In the method, when the small base station operates in a Low Duty operation Mode (LDM) in a superframe, a control signal including LDM operation information is generated. Only a subframe via which a preamble, a control signal including the LDM operation information, and a SuperFrame Header (SFH) are transmitted is transmitted during the superframe. When the small base station operates in a normal operation mode in a superframe, at least one of the control information and data is transmitted via at least one subframe of the superframe. | 05-08-2014 |
20140146863 | APPARATUS AND METHOD FOR BEAMFORMING GAIN DIFFERENCE COMPENSATION ACCORDING TO CHANGE OF TRANSMITTING AND RECEIVING BEAM PATTERN IN BEAMFORMING BASED WIRELESS COMMUNICATION SYSTEM - A method of operating a Mobile Station (MS) in a wireless communication system using beamforming includes receiving a reference signal over a plurality of downlink transmit (Tx) beams, measuring channel quality information of the received reference signal, and generating effective channel quality information by compensating for beamforming gain compensation information according to the channel quality information. | 05-29-2014 |
20140177687 | MODULATION METHOD AND APPARATUS WITH CONSIDERATION OF ADAPTIVE HYBRID AUTOMATIC REPEAT REQUEST IN WIRELESS COMMUNICATION SYSTEM - A modulation method and an apparatus with consideration of adaptive Hybrid Automatic Repeat reQuest (HARQ) in a wireless communication system are provided. The method of a transmission end supporting a hybrid modulation technique in which different types of modulation schemes are mixed, information of a channel state with a reception end is collected. A modulation order of a first type of a modulation scheme and a modulation order of a second type of a modulation scheme are determined. The modulation order of a first type of a modulation scheme and a modulation order of a second type of a modulation scheme form the hybrid modulation technique. | 06-26-2014 |
20140177756 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING SIGNAL IN COMMUNICATION SYSTEM - A method for transmitting a signal by a signal transmission apparatus in a communication system is provided. The method includes detecting a parameter related to a Quadrature Amplitude Modulation (QAM) scheme and a parameter related to a Frequency Shift Keying (FSK) scheme based on channel quality and an interference component, and modulating information bits using a modulation scheme based on the QAM scheme and the FSK scheme which uses the parameter related to the QAM scheme and the parameter related to the FSK scheme. | 06-26-2014 |
20140328266 | METHOD AND APPARATUS FOR MEASURING AND FEEDING BACK CHANNEL INFORMATION IN COMMUNICATION SYSTEM USING BEAM FORMING - A method of feeding back channel information by a receiver in a communication system beam forming is provided. The method includes determining an optimum reception beam using intensities of reference signals received through transmission beams of a base station for a first period through a first path for mapping analog beams of an input signal, and determining an optimum transmission beam of the transmission beams using intensities of reference signals received through the optimum reception beam for a second period through a second path for mapping analog beams of the input signal, and transmitting channel information measured by using a reference signal received through the optimum transmission beam and the optical reception beam to a transmitter. | 11-06-2014 |