Patent application number | Description | Published |
20090122754 | SYSTEM AND METHOD FOR ALLOCATING RESOURCES IN A COMMUNICATION SYSTEM - A method and system for allocating resources in a communication system are provided. The system includes a Base Station (BS) for allocating persistent resources included in a persistent resource area to one or more a Mobile Stations (MS) using the persistent resource area, for allocating an Identifier (ID) indicating an allocation order of the persistent resources to each of the one or more the MS using the persistent resource area, for transmitting resource allocation information including the ID and the number of slots included in the persistent resources to each of the one or more MSs using the persistent resource area, and for allocating dynamic resources to one or more MSs using a dynamic resource area, after the persistent resource allocation is completed for all of the one or more MSs using the persistent resource area. The persistent resource area includes successive persistent resources along a time axis and along a frequency axis. | 05-14-2009 |
20090135774 | APPARATUS AND METHOD FOR TRANSMITTING VOICE PACKET IN WIRELESS COMMUNICATION NETWORK - An apparatus and method for transmitting a voice packet in a wireless communication network are provided. The method includes generating voice data of a fixed length, which includes a voice packet having a length that is determined according to a rate of the voice packet, and a Forward Error Correction (FEC) code, and transmitting the generated voice data through a fixed resource. | 05-28-2009 |
20090147964 | APPARATUS AND METHOD FOR REMOVING AN ECHO SIGNAL IN A SIGNAL TRANSMISSION/RECEPTION APPARATUS OF A COMMUNICATION SYSTEM - A method and apparatus for removing an echo signal in a signal transmission/reception apparatus of a communication system are provided. A signal transmission/reception apparatus determines an echo channel impulse response using a reception signal, generates an echo signal removing coefficient using the echo channel impulse response, removes an echo signal from the reception signal using the echo signal removing coefficient, and transmits a signal in which the echo signal is removed. | 06-11-2009 |
20090149130 | APPARATUS AND METHOD FOR REMOVING AN ECHO SIGNAL IN A SIGANL TRANSMISSION/RECEPTION APPARATUS OF A COMMUNICATION SYSTEM - A method and apparatus for removing an echo signal in a signal transmission/reception apparatus of a communication system is provided. A signal transmission/reception apparatus estimates an input channel response using a training sequence, generates a first signal by removing the input channel response from a first reception signal, detects an echo channel impulse response using the first signal, detects an echo signal removing coefficient using the echo channel impulse response, generates a second signal in which an echo signal is removed by applying the echo signal removing coefficient to a second reception signal, and removes the second signal from a third signal, wherein the first signal is received prior to receiving the second signal and the second signal is received prior to receiving the third signal. | 06-11-2009 |
20090154418 | APPARATUS AND METHOD FOR DYNAMIC RESOURCE ALLOCATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for dynamic resource allocation in a wireless communication system are provided. A method of operating a Base Station (BS) includes configuring a bitmap to indicate whether radio resources are allocated to respective Access Terminals (ATs) according to resource scheduling, generating a resource allocation message including at least one of the configured bitmap, bit allocation information of the bitmap, and bit deallocation information of the bitmap, and transmitting the resource allocation message. | 06-18-2009 |
20090225714 | Apparatus and method for composing diversity subchannel in wireless communication system - An apparatus and a method for composing a subchannel in a wireless communication system are provided. The method includes performing a subband-based permutation on resources for composing a subchannel; selecting one or more subbands as resources for a band selection subchannel from the resources passing through the subband-based permutation; composing the band selection subchannel using at least one of the selected subbands; performing a resource allocation unit based permutation on resources not selected for the band selection subchannel; composing a resource allocation unit based diversity subchannel using subband remained in the selected subbands after the band selection subchannel is composed and at least one of the resource allocation units of the resources passing through the resource allocation unit based permutation; and composing a tone-based diversity subchannel by performing a tone-based permutation on resources remained after the resource allocation unit based diversity subchannel is composed. | 09-10-2009 |
20090232071 | Apparatus and method for using guard band as data subcarrier in communication system supporting frequency overlay - A method and apparatus for using a guard band as a data subcarrier in a communication system supporting frequency overlay are provided. In a method of operating mobile station for using a guard band as a subcarrier for signal transmission in a communication system supporting frequency overlay, the method includes searching for a first center frequency located at a position corresponding to an integer multiple of a subcarrier spacing, after searching for the first center frequency, receiving information indicating the numbers n | 09-17-2009 |
20090232072 | Resource allocation apparatus and method in broadband wireless communication system - A resource allocation apparatus and method in a broadband wireless communication system are provided. A communication method of a base station includes allocating a resource region to a user by performing resource scheduling, determining a node ID corresponding to the allocated resource region according to a hybrid resource structure based on a triangle structure in which at least one branch is configured as tree branch, configuring resource allocation information including the determined node ID, and transmitting the configured resource allocation information to the user. | 09-17-2009 |
20090262691 | Resource allocation apparatus and method for reducing overhead in mobile communication system - A resource allocation for reducing overhead in a mobile communication system is provided. An operating method of a base station for changing a fixed resource allocation to reduce overhead in a mobile communication system includes calculating a total amount of resources allocated to a corresponding subframe in a period of a corresponding fixed allocation resource; when the total amount of the resources allocated to the corresponding subframe is greater than a threshold, temporarily canceling one or more corresponding fixed allocation resources to make the total amount of the resources allocated to the corresponding subframe less than or equal to the threshold; and reallocating the one or more canceled fixed allocation resources according to a corresponding rule. | 10-22-2009 |
20090265599 | APPARATUS AND METHOD FOR SUPPORTING SYNCHRONOUS HYBRID AUTOMATIC REPEAT REQUEST IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and a method for supporting an HARQ scheme in a wireless communication system are provided. In a method for operating a base station, whether a resource used for a system of a different standard and a resource used for one of an HARQ reply and an HARQ retransmission packet by a synchronous HARQ scheme collide with each other is estimated. A collision packet ID is allocated to an HARQ subburst corresponding to one of an HARQ reply and an HARQ retransmission packet estimated to collide, and an offset of the one of the HARQ reply and the HARQ retransmission packet is changed. A MAP message including at least one of the collision packet ID, and changed offset information is generated. The MAP message is transmitted. | 10-22-2009 |
20090323620 | APPARATUS AND METHOD FOR RELOCATING PERSISTENTLY ALLOCATED RESOURCE IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - Apparatuses of a base station and terminal in a wireless communication system and their operating methods are provided. An operating method of a base station in a broadband wireless communication system includes determining whether to relocate at least one persistently allocated resource, when it is determined to relocate the at least one persistently allocated resource, relocating the at least one persistently allocated resource, generating a resource relocation Information Element (IE) indicative of the resource relocation using an offset of a Resource Block (RB), and transmitting the resource relocation IE. | 12-31-2009 |
20090323626 | Resource allocation apparatus and method for reducing overhead in mobile communication system - An operating method of a base station for changing a fixed resource allocation to reduce overhead in a mobile communication system includes calculating a total amount of resources allocated to a corresponding subframe in a period of a corresponding fixed allocation resource; when the total amount of the resources allocated to the corresponding subframe is greater than a threshold, temporarily canceling one or more corresponding fixed allocation resources to make the total amount of the resources allocated to the corresponding subframe less than or equal to the threshold; and reallocating the one or more canceled fixed allocation resources according to a corresponding rule. | 12-31-2009 |
20090323628 | METHOD FOR TRANSMITTING AND RECEIVING MAP IN WIRELESS MOBILE COMMUNICATION SYSTEM AND SYSTEM THEREFOR - An apparatus and method for transmitting MAP by a base station in a wireless mobile communication system using a frame that includes a plurality of mini frames occupying a specific time period, each of the mini frames including a plurality of Resource Blocks (RBs) occupying a specific frequency band are provided. A number of RBs to be occupied by a data burst to be transmitted is determined. A first variable indicative of a number of mini frames to be occupied by the data burst is determined based on a resource amount corresponding to the number of RBs and an available resource amount of the mini frame. A second variable is determined based on the number of RBs and the first variable. MAP is transmitted that includes the first variable, the second variable, and information indicating RBs where a resource is allocated in a mini frame first located in a time domain among the mini frames to be occupied by the data burst. Each of the RBs where the resource is allocated represents an RB where one of packets segmented from the data burst is allocated. | 12-31-2009 |
20100002631 | APPARATUS AND METHOD FOR NOTIFYING CHANGE OF SYSTEM CONTROL INFORMATION IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for notifying a change of system control information in a wireless communication system are provided. The method includes, changing a Group Configuration Change Counter (GCCC) and upon change of a Secondary-Super Frame Header/Sub-Packet1 (S-SFH/SP1) whose transmission period is changeable within a range of one or more super frames, changing the GCCC and information representing the change of the common control message upon change of at least one common control message, and transmitting the GCCC and the information representing the change of the at least one common control message. | 01-07-2010 |
20100003996 | Apparatus and method for resource allocation for frequency overlay scheme in a broadband wireless communication system - A broadband wireless communication system supporting a frequency overlay scheme is provided. An operating method of a base station includes allocating relative addresses to Resource Blocks in at least one operating Frequency Assignment (FA) of a terminal according to an addressing scheme for the terminal; generating at least one resource indicator represented with the relative addresses; generating resource allocation information which comprises the at least one resource indicator; and transmitting the resource allocation information through a primary FA of the terminal. | 01-07-2010 |
20100005358 | APPARATUS AND METHOD FOR SUPPORTING HYBRID ARQ IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for supporting Hybrid Automatic Repeat reQuest (HARQ) in a broadband wireless communication system are provided. A method of performing HARQ by a Mobile Station (MS) in a wireless communication system includes receiving a control message including resource allocation information, decoding the control message, if the decoding is successful, determining whether a previous control message is lost, and if the previous control message is lost, transmitting one of a null signal and a specific indicator through a response channel. | 01-07-2010 |
20100040010 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING INFORMATION THROUGH FAST FEEDBACK CHANNEL IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmitting and receiving information through a fast feedback channel in a broadband wireless communications system are provided. The apparatus includes a generator for generating a quasi-orthogonal signal stream corresponding to a codeword to be fed back, a plurality of mappers for mapping the quasi-orthogonal signal stream to a plurality of bundles in the fast feedback channel by using different mapping patterns, and a transmitter for transmitting the quasi-orthogonal signal stream mapped to the plurality of bundles. | 02-18-2010 |
20100056067 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING FAST FEEDBACK INFORMATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for operating a fast feedback channel in a broadband wireless communication system are provided. The method includes generating and transmitting a feedback signal through a fast feedback channel of a first mode, determining to switch a mode of the fast feedback channel from the first mode to a second mode, transmitting a signal for requesting the mode switching of the fast feedback channel through the fast feedback channel, and generating and transmitting a feedback signal through a fast feedback channel of the second mode. | 03-04-2010 |
20100111062 | APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING SYSTEM INFORMATION IN A WIRELESS COMMUNICATION SYSTEM WITH HIERARCHICAL CELL STRUCTURE - An apparatus and method for transmitting/receiving system information in a wireless communication system with a hierarchical cell structure are provided. A method for transmitting system information in a micro Base Station (BS) in a wireless communication system in which at least one micro cell exists within a macro cell includes transmitting first system information to a Mobile Station (MS) communicating with a macro BS within a micro cell and an MS communicating with a micro BS within the micro cell, and transmitting second system information to the MS communicating with the micro BS within the micro cell. | 05-06-2010 |
20100113036 | Apparatus and method for operating small cell in wireless communication system - A Handover apparatus and method of a Mobile Station (MS) in a wireless communication system in which at least one small cell resides in a macro cell includes, when entering a neighboring small cell, checking a movement speed of the MS. The method also includes determining whether to hand over to the small cell by taking into account the movement speed of the MS. When it is determined not to hand over to the small cell, that MS transmits small cell penetration information to a macro Base Station (BS); allocates a macro only resource from the macro BS; and communicates with the macro BS in the small cell using the macro only resource allocated from the macro BS. | 05-06-2010 |
20100174961 | Apparatus and method for allocating ACK/NACK channel in wireless communication system - An apparatus is capable of allocating an ACK/NACK channel in a wireless communication system. The apparatus performs a method for allocating the ACK/NACK channel at a base station that includes generating ACK/NACK channel allocation information of a packet transmitted to a terminal; inserting the ACK/NACK channel allocation information into the packet using a padding area indicative of a size difference of data carried by the packet and an Automatic Repeat Request (ARQ) block; and transmitting the packet comprising the inserted ACK/NACK channel allocation information to a terminal to service. | 07-08-2010 |
20100189040 | APPARATUS AND METHOD FOR TRANSMITTING INFORMATION VIA UPLINK CONTROL CHANNEL IN OFDMA COMMUNICATION SYSTEM - An apparatus is capable of transmitting information via an uplink control channel in an Orthogonal Frequency Division Multiple Access (OFDMA) communication system. Uplink control information is encoded to obtain a predetermined bit string. A signal sequence corresponding to the predetermined bit string is generated. The signal sequence is cyclic-shifted according to a predetermined rule. The cyclic-shifted signal sequence is controlled according to a subframe length. Therefore, reception performance deterioration of an uplink control channel allocated to an irregular subframe can be minimized. | 07-29-2010 |
20100316008 | METHOD AND APPARATUS FOR RESOURCE ALLOCATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for resource allocation according to a persistent allocation scheme in a wireless communication system is disclosed. A base station generates a resource allocation Information Element (IE) including an allocation period for persistent allocation and resource allocation information indicating a persistent resource, loads the IE on a map message, and then transmits the map message to a mobile station. The number of ACIDs indicating the number of HARQ channels used for an HARQ operation is calculated based on the maximum retransmission delay for the HARQ operation and the allocation period acquired from the resource allocation IE. Therefore, the present invention minimizes the map overhead for resource allocation according to the persistent allocation scheme. | 12-16-2010 |
20100317389 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING GROUP RESOURCE DEALLOCATION INFORMATION IN A COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving group resource deallocation information in a communication system are provided. The method in a base station includes transmitting group resource deallocation information, which includes information indicating a group including a plurality of Mobile Stations (MSs) receiving the group resource deallocation information, and information indicating whether a resource is allocated to each of the MSs. | 12-16-2010 |
20110069654 | APPARATUS AND METHOD FOR MULTI-HOP RELAY COMMUNICATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and operating method of a Relay Station (RS) and a Base Station (BS) controller for a multi-hop relay communication in a broadband wireless communication system is provided. The method of the RS includes, when receiving at least one traffic Media Access Control (MAC) Protocol Data Unit (PDU) from a Mobile Station (MS) accessing the RS, extracting a Layer-3 (L3) packet from the at least one traffic MAC PDU, generating a relay MAC PDU including the L3 packet, and transmitting the MAC PDU to the BS through an RS Service Flow (SF) which supports Quality of Service (QoS) required by an MS SF carrying the L3 packet. | 03-24-2011 |
20110092232 | APPARATUS AND METHOD FOR ELIMINATING INTER CELL INTERFERENCE IN MULTIPLE INPUT MULTIPLE OUTPUT WIRELESS COMMUNICATION SYSTEM - Provided is a device and a method for eliminating inter-cell interference in Multiple Input Multiple Output (MIMO) wireless communication system. The method for operating a user equipment for eliminating the inter-cell interference includes determining one or more optimum bands among bands not requested to be restricted from a neighboring cell, determining at least one of band and Precoding Matrix Index (PMI) to be requested to be restricted to the neighboring cell among the determined one or more optimum bands, and feeding back at least one of the band and PMI to be requested to be restricted to the neighboring cell to a serving base station. | 04-21-2011 |
20110103307 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING REFERENCE SIGNAL FOR POSITIONING IN WIRELESS COMMUNICATION SYSTEM - A method and apparatus for transmitting/receiving a reference signal for positioning in a wireless communication system are provided. In the method, a BS locates a PA preamble in a second frame among frames constituting each of multiple superframes, locates a SA preamble in first symbols of first and third frames among the frames constituting each of the multiple superframes, determines multiple consecutive first superframes belonging to an LBS zone from among the multiple superframes, includes a reference signal for LBS in a first symbol of a first subframe of a last frame among frames constituting each of the first superframes, includes data in a first symbol of a first subframe of a last frame among frames constituting each of second superframes that correspond to the multiple superframes excluding the first superframes when the data is to be transmitted, and communicates with an MS by using the first and second superframes. | 05-05-2011 |
20110116462 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING REFERENCE LOCATION SIGNAL IN MOBILE COMMUNICATION SYSTEM - A method and an apparatus for transmitting/receiving a reference signal in a mobile communication system are provided. The method of a base station includes determining a cell identifier of a plurality of segments included in the base station, determining a resource allocated to the plurality of segments using the cell identifier in a preconfigured Location Based Service (LBS) zone, and transmitting a reference location beacon signal via the determined resource. The plurality of segments is allocated the same resource, and transmits the same signal. Therefore, accuracy of location estimation may be guaranteed. | 05-19-2011 |
20110150108 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING RESOURCE ALLOCATION INFORMATION IN A COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving resource allocation information in a communication system are provided, in which a Base Station (BS) transmits resource allocation information including a folding bitmap and a Zone Flag (ZF). The folding bitmap provides zone configuration information about zones included in a subframe and the ZF indicates whether a last zone of the zones is allocated as a first service zone or a second service zone. The first service zone carries data for a first service, the second service zone carries data for a second service, and each of the first and second services zones includes at least one resource unit. | 06-23-2011 |
20110158192 | APPARATUS AND METHOD FOR EFFICIENTLY OPERATING FAST FEEDBACK CHANNEL IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method for efficiently operating a fast feedback channel in a wireless communication system are provided. A method for operating a feedback channel in a Base Station (BS) of a wireless communication system includes identifying feedback information types of one or more feedback channels intended to be deallocated among a plurality of existing allocated feedback channels for a Mobile Station (MS), activating a bit corresponding to the identified feedback information type in a ‘deallocation bitmap’ field within a DownLink (DL) control signal, and transmitting the DL control signal to the MS. Among the feedback information types of the plurality of existing allocated feedback channels, the feedback information type having the smallest value corresponds to the highest priority bit among bits within the ‘deallocation bitmap’ field. | 06-30-2011 |
20110161778 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING DATA IN RESOURCE ALLOCATION IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for transmitting and receiving data in resource reallocation in a wireless communication system are provided. The method includes transmitting control information for the uplink resource reallocation to a corresponding terminal, according to the uplink resource reallocation, receiving an uplink packet from the corresponding terminal and determining whether the corresponding terminal receives the control information, and when the corresponding terminal does not receive the control information, informing the corresponding terminal of the determination result by transmitting a NULL signal over a feedback channel for previous uplink resource allocation. Thus, the resource utilization of the system can be raised by preventing repeated data retransmission until a next resource reallocation period. | 06-30-2011 |
20110173518 | APPARATUS AND METHOD FOR DETERMINING RELIABIILTY OF DECODED DATA IN COMMUNICATION SYSTEM - A method and apparatus for determining the reliability of decoded data in a communication system. The method includes calculating a total sum of absolute values corresponding to Log Likelihood Ratio (LLR) values of received data, generating a first value obtained by multiplying the total sum of the absolute values by a predetermined threshold value, performing iterative decoding with respect to the LLR values of the received data, generating a survived path metric value having a maximum value among all path metric values as a decoded result and generating decoded data, comparing the first value with the survived path metric value, and determining whether the decoded data has suitable reliability according to the compared result. | 07-14-2011 |
20110182346 | APPARATUS AND METHOD FOR ESTIMATING NOISE AND INTERFERENCE POWER IN COMMUNICATION SYSTEM - An apparatus and a method for estimating a Noise and Interference (NI) power in a communication system are provided. The method includes, calculating average values of impulse responses according to ranging codes, through use of a ranging signal sequence received through a resource allocated to a ranging channel, arranging the average values of the impulse responses according to ranging codes in order of the highest value to the lowest value, and multiplying a ranging code, which corresponds to an impulse response having an (x+1) | 07-28-2011 |
20110223942 | APPARATUS AND METHOD FOR MULTIPLE PAGINGS IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for operating a paging control in a broadband wireless communication system are provided. The method includes receiving paging information used to determine a location of a paging listening interval in an idle mode, determining whether multiple pagings are applied, using a maximum paging number field contained in the paging information, determining locations of a plurality of paging listening intervals in a paging cycle using a paging spacing value and an initial paging offset contained in the paging information, and determining whether the terminal is paged in each of the paging listening intervals. | 09-15-2011 |
20110223949 | APPARATUS AND METHOD FOR MITIGATING INTER-CELL INTERFERENCE IN MULTIPLE ANTENNA SYSTEM - An apparatus and method for mitigating inter-cell interference in a Multiple Input Multiple Output (MIMO) system are provided. The method includes allocating a serving band for providing service to at least one Mobile Station (MS) through scheduling, receiving at least one request set for at least one neighboring cell, from at least one MS, updating the at least one request set considering a serving band of each MS, and transmitting the updated at least one request set to the at least one neighboring cell. The request set includes at least one piece of information among a band and Precoding Matrix Index (PMI) for making a use restriction request to a neighboring cell that exerts interference on an MS. | 09-15-2011 |
20110305158 | METHOD AND APPARATUS FOR TRANSMITTING/RECEIVING MULTICAST RESOURCE ALLOCATION INFORMATION IN COMMUNICATION SYSTEM - A method and an apparatus for transmitting and receiving multicast resource allocation information in a communication system are provided. In the communication system, a base station transmits the multicast resource allocation information to a mobile station, wherein the multicast resource allocation information includes a Group IDentifier (ID) of a group which should receive multicast resource allocation information on multicast resources through which a multicast data burst is to be transmitted, a Resource Index indicating a location and a size of allocated multicast resources, and a Long Transmission Time Interval Indicator (Long_TTI_Indicator) indicating a number of Advanced Air Interface (AAI) subframes spanned by the allocated multicast resources. | 12-15-2011 |
20120009945 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING LOCATION BASED SERVICE RESOURCE ALLOCATION INFORMATION IN A MOBILE COMMUNICATION SYSTEM - A method, an Advanced Base Station (ABS) and an Advanced Mobile Station (AMS) for transmitting Location Based Service (LBS) resource allocation information by an ABS in a mobile communication system are provided. The ABS transmits LBS resource allocation information including LBS zone configuration information representing an LBS zone transmission period. The LBS zone configuration information includes at least one of first information indicating that LBS zone transmission is switched off, second information indicating that the LBS zone transmission period corresponds to a first number of super frames, third information indicating that the LBS zone transmission period corresponds to a second number of super frames, and fourth information indicating that the LBS zone transmission period corresponds to a third number of super frames. | 01-12-2012 |
20120040695 | METHOD AND APPARATUS FOR PROVIDING LOCATION BASED SERVICE IN WIRELESS COMMUNICATION SYSTEM - A method and an apparatus for providing a location based service in a wireless communication system are provided. A method of a Base Station (BS) for a Location Based Service (LBS) in a wireless communication system includes allocating identifiers to a plurality of transmission devices in a service coverage area of the BS, generating a Reference Signal (RS) including the identifier of the corresponding transmission device and an identifier of the BS with respect to each of the transmission devices, and transmitting the RS generated for each of the transmission devices, to a Mobile Station (MS) via the corresponding transmission device. | 02-16-2012 |
20120063378 | METHOD, APPARATUS AND SYSTEM FOR PROVIDING MULTICAST SERVICE IN A COMMUNICATION SYSTEM - Methods for providing a multicast service by a Base Station (BS) and a Mobile Station (MS) in a communication system, and a BS and an MS for performing the methods, are provided. The method for providing a multicast service by a BS in a communication system includes providing a multicast service to an MS using a multicast group IDentifier (ID) used to uniquely identify a multicast service in a network, and a Flow ID (FID) used along with the multicast group ID to uniquely identify a multicast flow in the network. | 03-15-2012 |
20120087447 | APPARATUS AND METHOD FOR ESTIMATING HIGH SPEED FREQUENCY OFFSET IN WIRELESS COMMUNICATION SYSTEM - An apparatus and method estimate a high speed frequency offset in a wireless communication system. The apparatus includes a correlator, an accumulator, a phase calculator, and a frequency offset coupler. The correlator performs a first correlation and a second correlation based on a first reference signal and a second reference signal. The accumulator accumulates results of the correlations. The phase calculator calculates a first phase and a second phase from the accumulated first correlation value and the accumulated second correlation value. The frequency offset coupler determines whether a frequency offset deviates from a frequency offset estimate range based on a difference between the first phase and the second phase, and compensates the frequency offset according to the determination result. The apparatus can estimate a frequency offset within an error allowable range under an environment where a terminal moves at high speed. | 04-12-2012 |
20120176913 | APPARATUS AND METHOD FOR FREQUENCY OFFSET ESTIMATION FOR HIGH SPEED IN BROADBAND WIRELESS ACCESS SYSTEM - An apparatus and method estimate frequency offset for high speed in a wireless access system. An operation of a Base Station (BS) includes performing feedback channel detection for a terminal classified as a low speed mode, and, if the feedback channel detection fails continuously by the predefined number of times, and a frequency offset estimation result using a pilot signal exceeds a threshold value, classifying the terminal as a high speed mode. | 07-12-2012 |
20120207253 | METHOD AND APPARATUS FOR PERFORMING CHANNEL ESTIMATION IN A WIRELESS COMMUNICATION SYSTEM - A method and apparatus for performing channel estimation in a wireless communication system, in which a channel estimate of each pilot tone included in adjacent first and second resource allocation blocks is calculated. Channel estimates of first pilot tones are detected, which have a predetermined subcarrier spacing or less from the second resource allocation block, channel estimates of second pilot tones are detected; and which have a predetermined subcarrier spacing or less from the first resource allocation block. The channel estimates of the first and second pilot tones are updated, and channel estimation is then performed using the updated channel estimates. | 08-16-2012 |
20120207254 | APPARATUS AND METHOD FOR MMSE CHANNEL ESTIMATION IN CONSIDERATION OF OFFSET COMPENSATION IN WIRELESS COMMUNICATION SYSTEM - A channel estimation method of a channel estimation apparatus in a wireless communication system is provided. The method includes predefining a plurality of weight tables about at least one of a speed and a Carrier to Interference-and-Noise Ratio (CINR) using a correlation value considering offset compensation; selecting a weight table to be used for channel estimation based on at least one of the estimated speed and the CINR, from the plurality of weight tables; and multiplying a pilot channel estimation value and the selected weight table, and performing data channel estimation. | 08-16-2012 |
20120207257 | METHOD AND APPARATUS FOR OFFSET ESTIMATION IN MOBILE COMMUNICATION SYSTEM - A method and an apparatus for estimating an offset are provided. The method includes determining one of a frequency offset and a timing offset to be estimated first for pilot symbols detected from a received signal, estimating one of the frequency offset and the timing offset for the pilot symbols according to the determination, compensating for an offset of the pilot symbols based on the estimated offset, and estimating remaining one of the frequency offset and the timing offset which is not estimated for the offset compensated pilot symbols. | 08-16-2012 |
20120210197 | APPARATUS AND METHOD FOR DECODING IN COMMUNICATION SYSTEM - An apparatus and a method for decoding bits of a received signal in a communication system are provided. The method includes determining path metrics of respective states in a trellis corresponding to the received signal, selecting a start state in the trellis for a traceback in a last window of the trellis, repeating the traceback at least twice within the last window, and when the repeating of the traceback is completed, determining the decoded bits of the received signal using a survived path of a last traceback. | 08-16-2012 |
20120275422 | APPARATUS AND METHOD FOR DYNAMIC RESOURCE ALLOCATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for dynamic resource allocation in a wireless communication system are provided. A method of operating a Base Station (BS) includes configuring a bitmap to indicate whether radio resources are allocated to respective Access Terminals (ATs) according to resource scheduling, generating a resource allocation message including the configured bitmap and at least one of bit allocation information of the bitmap and bit deallocation information of the bitmap, and transmitting the resource allocation message. | 11-01-2012 |
20130094469 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING INFORMATION THROUGH FAST FEEDBACK CHANNEL IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for transmitting information through a fast feedback channel in a wireless communications system are provided. The apparatus includes a plurality of mappers for mapping a sequence, corresponding to an index to be fed back, to a first set of resource blocks in a fast feedback channel by using a first mapping pattern and to a second set of resource blocks in the fast feedback channel by using a second mapping pattern, and a transmitter for transmitting the sequence mapped to a plurality of sets of resource blocks, wherein the sequence is mapped to each of the plurality of sets of resource blocks, and wherein each element of the sequence is mapped to each resource block. | 04-18-2013 |
20140120937 | APPARATUS AND METHOD FOR MITIGATING INTER-CELL INTERFERENCE IN MULTIPLE ANTENNA SYSTEM - A method for operating a Base Station (BS) in a wireless communication system is provided. The method comprises of receiving at least one request set for at least one neighboring cell, from at least one Mobile Station (MS), updating the at least one request set based at least in part on a serving band of each MS, and transmitting the updated at least one request set to the at least one neighboring cell, wherein the request set comprises a band and a Precoding Matrix Index (PMI) for making a use restriction or recommendation request to a neighboring cell. | 05-01-2014 |
20140221024 | APPARATUS AND METHOD FOR MULTIPLE PAGINGS IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for operating a paging control in a broadband wireless communication system are provided. The method includes receiving paging information used to determine a location of a paging listening interval in an idle mode, determining whether multiple pagings are applied, using a maximum paging number field contained in the paging information, determining locations of a plurality of paging listening intervals in a paging cycle using a paging spacing value and an initial paging offset contained in the paging information, and determining whether the terminal is paged in each of the paging listening intervals. | 08-07-2014 |
20140286271 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING FAST FEEDBACK INFORMATION IN BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for operating a fast feedback channel in a broadband wireless communication system are provided. The method includes generating and transmitting a feedback signal through a fast feedback channel of a first mode, determining to switch a mode of the fast feedback channel from the first mode to a second mode, transmitting a signal for requesting the mode switching of the fast feedback channel through the fast feedback channel, and generating and transmitting a feedback signal through a fast feedback channel of the second mode. | 09-25-2014 |