Patent application number | Description | Published |
20080205258 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING MAP INFORMATION IN A COMMUNICATION SYSTEM - A method and apparatus for transmitting and receiving MAP information in a communication system are provided. A base station acquires channel quality information of each mobile station, generates sub-MAPs using MAP information, to which at least one of a coding scheme, a modulation scheme and a repetition scheme is applied, separately for each mobile station according to the channel quality information, and transmits the generated sub-MAPs. A mobile station receives MAP information from the base station, detects a sub-MAP allocated to the mobile station from the received MAP information, and restores the detected sub-MAP to MAP information using at least one of a corresponding decoding scheme, demodulation scheme and repetition scheme corresponding to coding scheme, modulation scheme and repetition scheme applied in the base station, based on channel quality information of the mobile station. Accordingly, system overhead can be reduced. | 08-28-2008 |
20080205364 | METHOD AND SYSTEM FOR CONFIGURING A FRAME IN A COMMUNICATION SYSTEM - A method and system for configuring a frame in a communication system is provided. The method includes determining a number of frames for configuring one multi-frame, wherein the number is at least two, and configuring each of the determined number of frames, wherein the determined number of frames include a first frame and a second frame temporally discriminated from each other, each of the determined number of frames includes a downlink sub-frame and an uplink sub-frame, a downlink sub-frame of the first frame includes a first area for transmitting a reference signal used for an acquisition of synchronization between a base station and a mobile station, a second area including system information and common control information related to the multi-frame, a third area including modulation scheme information and allocation information of data bursts, a fourth area to which a downlink data burst is allocated in a diversity mode and a fifth area to which a downlink data burst is allocated in a band Adaptive Modulation and Coding (AMC) mode, and a downlink sub-frame of the second frame includes a sixth area including modulation scheme information and allocation information of data bursts, a seventh area to which a data burst is allocated in a diversity mode, and an eighth area to which a data burst is allocated in an AMC mode. | 08-28-2008 |
20080205369 | APPARATUS AND METHOD FOR POWER DISTRIBUTION BY FREQUENCY ALLOCATION IN MULTI-FREQUENCY ALLOCATION BROADBAND WIRELESS COMMUNICATION SYSTEM - An apparatus and method for power distribution by Frequency Allocation (FA) in a multi-band broadband wireless communication system are provided. The method includes detecting at least one of a loading value and a performance efficiency value by band, calculating a power distribution value by band using the detected value and calculating a power value by band using the calculated band power distribution value. The method and apparatus provide a scheme that can vary a power distribution of each band according to need and cope with subscriber capacity more flexibly when a plurality of diverse systems coexist. | 08-28-2008 |
20080212531 | METHOD AND SYSTEM FOR TRANSMITTING/RECEIVING SIGNAL IN A COMMUNICATION SYSTEM - A method and system for transmitting a signal in a communication system is disclosed, in which a BS transmits control information in a predetermined third zone of a frame, the frame being divided into a first and a second zones in frequency and the third zone being included in the first zone, and transmits a data burst in at least one of a fourth zone and the second zone, the fourth zone being a remaining zone of the first zone other than the third zone. | 09-04-2008 |
20080232312 | APPARATUS AND METHOD FOR TRANSMITTING UPLINK FEEDBACK DATA IN A BROADBAND WIRELESS MOBILE COMMUNICATION SYSTEM - An apparatus and a method for transmitting uplink feedback data in a broadband wireless mobile communication are provided. The method comprises dividing tiles used as a feedback channel into a preset number of groups, selecting one group among the preset number of groups using a downlink channel, selecting a number of tiles, the number of tiles being equal to a number of tiles required for feedback data transmission in the selected group, and mapping feedback data to each selected tile. Thereby, feedback information can be transmitted via a tile selected by a terminal based on a channel state without a process of allocating and reallocating an additional feedback channel, thus enhancing efficiency of uplink wireless resources. | 09-25-2008 |
20080310361 | APPARATUS AND METHOD FOR RETRANSMISSION IN A WIRELESS COMMUNICATION SYSTEM - An apparatus and method for retransmission in a wireless communication system. The method includes transmitting data to a Mobile Station (MS), identifying if there is an error in the transmitted data through a control message, if there occurs an error in the data, allocating resources for retransmitting data for erroneous data, transmitting information on the resources allocated for retransmission, to the MS, and retransmitting the data for the erroneous data to the MS. | 12-18-2008 |
20080317162 | SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM - A system and method for transmitting/receiving data in a communication system is provided. A transmitter is allocated resources using a circuit mode scheme, determines if there is actual data to be transmitted to a receiver, and transmits information representing that there is no actual data to be transmitted using the allocated resources when it is determined that there is no actual data to be transmitted. | 12-25-2008 |
20090022111 | APPARATUS AND METHOD FOR CIRCUIT MODE RESOURCE ALLOCATION IN BROADBAND WIRELESS ACCESS (BWA) SYSTEM - An apparatus and method for circuit mode resource allocation in a Broadband Wireless Access (BWA) system is disclosed. The method includes generating a first resource allocation message which comprises currently used slot bitmap information with respect to a circuit mode region in a frame; allocating resources to one or more terminals with respect to currently unused slots in the circuit mode region according to the currently used slot bitmap information; and generating a second resource allocation message which comprises information relating to the resource allocation. Thus, the effective circuit mode resource allocation can be achieved without holes in the circuit mode, while maintaining backward compatibility with the existing standards. | 01-22-2009 |
20090069026 | Apparatus and method for estimating carrier to interference and noise ratio in a mobile communication system based on fractional frequency reuse - An apparatus and method for estimating a carrier to interference and noise ratio (CINR) in a mobile communication system based on a fractional frequency reuse are provided. The method includes receiving a report on CINR information on a common zone from a mobile station (MS) allocated a restricted zone, calculating a received signal power value using a CINR value and an interference level value for the common zone of the MS, and estimating a CINR value for a restricted zone using the received signal power value of the MS and an interference level for the restricted zone. | 03-12-2009 |
20090069043 | Method and apparatus for controlling transmission power in mobile communication system based on fractional frequency reuse - A method and apparatus for controlling a transmission (Tx) power in a mobile communication system based on fractional frequency reuse are provided. In a method of operating a base station (BS) for controlling the Tx power in the mobile communication system, the method includes receiving from neighboring BSs received signal strength indication (RSSI) information for one or more restricted band allocated, calculating backoff values of the Tx power for the restricted bands by using the RSSI information, and determining the Tx power for each restricted band by using a difference between the backoff value of the Tx power for the restricted band and a maximum Tx power. Accordingly, resources can be further effectively used. | 03-12-2009 |
20090103569 | SYSTEM AND METHOD FOR TRANSMITTING/RECEIVING SIGNAL IN A COMMUNICATION SYSTEM - A system and method for transmitting/receiving a signal in a communication system are provided, in which a transmitter determines to change a transmission time of a superframe header, when a structure of a superframe is changed, determines the transmission time of the superframe header according to a result of the determination to change the transmission time of the superframe header, transmits information about the determined transmission time to a receiver, and transmits the superframe header at the determined transmission time. | 04-23-2009 |
20090111376 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA IN A COMMUNICATION SYSTEM - An apparatus and method for transmitting and receiving data in a communication system are provided. In the method, a BS selects a repeater group from among a plurality of repeater groups, for use in transmitting first data to an MS and transmits the first data to the MS according to the number of repeaters of the selected repeater group. The first data is different from data transmitted by the repeaters of the selected repeater group. | 04-30-2009 |
20090113273 | APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING DATA RESTORATION INFORMATION IN A COMMUNICATION SYSTEM - An apparatus and method for transmitting data restoration information in a communication system are provided, in which a BS transmits first data in a first zone of a frame, transmits second data in a second zone of the frame, transmits first data restoration information for restoring the first data in the first zone, and transmits second data restoration information for restoring the second data in the second zone. The first data comprises the same data as data transmitted simultaneously by at least one repeater and the second data comprises data that is different from data transmitted by the at least one repeater. | 04-30-2009 |
20090135779 | APPARATUS AND METHOD FOR CIRCUIT MODE RESOURCE ALLOCATION IN A BROADBAND WIRELESS COMMUNICATION SYSTEM - A broadband wireless communication system using a fixed allocation scheme is provided. The system includes a controller for configuring change report information to report occurrences of resource release or change when resources are released or changed in a fixed allocation region, a generator for generating a fixed allocation Information Element (IE) including the change report information and history information regarding the resource release or change, and a transmitter for transmitting the fixed allocation IE. | 05-28-2009 |
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 |
20090296622 | APPARATUS AND METHOD FOR ALLOCATING FREQUENCY RESOURCES IN A FREQUENCY OVERLAY SYSTEM - A method for allocating frequency resources by a Base Station (BS) in a frequency overlay system is provided. The method includes grouping at least one Mobile Station (MS) capable of using the same Frequency Allocation (FA), according to zones, multicasting zone information indicating a frequency resource available for each zone to at least one MS belonging to a corresponding zone, unicasting resource allocation information indicating an allocated frequency resource to at least one MS to which the frequency resource is allocated, among the grouped MSs, and communicating with the at least one MS using the allocated frequency resource indicated by the resource allocation information, within the frequency resource indicated by the zone information. | 12-03-2009 |
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 |
20110119385 | APPARATUS FOR RESOURCE ALLOCATION IN A FREQUENCY OVERLAY SYSTEM AND A METHOD THEREOF - A resource allocation method and apparatus for a frequency overlay system that is capable of reducing the overhead of the resource allocation information transmitted by the base station is provided. A frequency overlay system of the present invention includes a base station which transmits resource allocation information including an address type selected among multiple address types designating addresses for transmission resource in different patterns and an address value indicating a resource region allocated according to the selected address type and at least one mobile station which receives the resource allocation information and receives data through the resource region identified with reference to the resource type and address value indicated by the resource allocation information; and a resource allocation method of the present invention includes transmitting, at a base station, resource allocation information including an address type selected among multiple address types designating addresses for transmission resource in different patterns and an address value indicating a resource region allocated according to the selected address type, and receiving, at a mobile station, data through the resource region identified with reference to the resource type and address value indicated by the resource allocation information. | 05-19-2011 |