Abstract: A transmission method and apparatus are provided for use in a wireless communication system in which a cell includes a plurality of sub-cells. A Transmission Point (TP) in the wireless communication system includes a transmitter configured to transmit a signal to each of the plurality of sub-cells through a plurality of antennas; a receiver configured to receive uplink control information from a User Equipment (UE) located within at least one of the plurality of sub-cells; and a controller configured to determine a virtual matrix for each of the plurality of sub-cells, to select a precoding matrix according to the virtual matrices of the plurality of sub-cells, to determine a cooperative transmission mode or a normal transmission mode, based on the received uplink control information, and to control the transmitter to perform downlink transmission on a sub-cell basis through the virtual matrices of the sub-cells according to the determined transmission mode.

Abstract: A method and an apparatus for effectively determining a terminal which will transmit or receive packets in a packet-based wireless network are provided. The scheduling method of a base station of a wireless communication system includes determining a first status variable for an increment of whole network utility to data amount allocated to at least one terminal and a second status variable for an increment of the whole network utility to a scheduling chance allocated to the terminal, determining a scheduling metric based on the first and second status variables, and scheduling the at least one terminal based on the scheduling metric.

Abstract: A method for scheduling by a base station is provided. The method includes updating a first time that is required to complete ongoing data transmission with respect to terminals to which the base station is transmitting the data for a predetermined period, updating a second time that is delayed from a scheduled data transmission completion time with respect to the terminals whenever the data transmission is completed, determining priority values on the basis of the updated first time and the updated second time with respect to the terminals for the predetermined period, and performing the scheduling of the resources with respect to one or more of the terminals on the basis of the determined priority values for the predetermined period.

Abstract: A method and an apparatus for controlling coverage of a base station in a wireless communication system are provided. The method includes determining a coverage control target terminal among terminals within a service radius of the base station and increasing a coverage of the coverage control target terminal.

Abstract: The present invention relates to a method and apparatus for transmitting data in a wireless communication system for supporting multi-cells formed of a plurality of sub-cells. The method includes the steps of: connecting at least one virtual transmission port to each of the plurality of sub-cells; determining the transmission mode for a terminal on the basis of channel states between at least two of the plurality of sub-cells and the terminal; and transmitting data for each sub-cell to the terminal through at least one virtual transmission port connected to a corresponding sub-cell on the basis of the determined transmission mode.

Abstract: Methods and apparatus are provided for controlling interference by a TP in a wireless communication system. A first message, which includes channel quality information for the TP, is received from a terminal to which the TP provides a communication service. A second message, which includes received power information for a reference signal received from the terminal, is received from at least one neighbor TP. A data transmission rate is determined for the terminal based on the channel quality information and the received power information.

Abstract: A method and an apparatus select optimized Frequency Allocation (FA) in a mobile communication system that includes mobile base stations. A first control information is received from neighbor base stations. System capacities of the respective neighbor base stations are determined based on the first control information. The FA that maximizes a sum of the system capabilities of the respective neighbor base stations is selected. Therefore, the method has an advantage of securing maximum capacity by adaptively setting FA with consideration of radio environments of neighbor base stations during network entry of a new mobile base station or during an operation of a mobile base station.

Abstract: A method and apparatus are provided for determining channel quality in a wireless communication system. The method includes receiving Channel Quality Information (CQI) from a receiver; generating a channel quality reference value by correcting the received CQI using first resource use/nonuse information received from a scheduler that indicates whether an adjacent cell used resources at a previous time, and received signal power information measured in the adjacent cell; and determining a channel quality value at a current time using the generated channel quality reference value and second resource use/nonuse information received from the scheduler that indicates whether an adjacent cell uses resources at the current time.

Abstract: An apparatus and method perform Transmit Power Control and Dynamic Frequency Selection (TPC/DFS) during a movement of a Base Station (BS). A network environment around the mobile BS is modeled. Based on the modeling result, a TPC/DFS operation scheme that is most suitable to the mobile BS is selected.

Abstract: The present invention relates to a method and apparatus for transmitting data in a wireless communication system for supporting multi-cells formed of a plurality of sub-cells. The method includes the steps of: connecting at least one virtual transmission port to each of the plurality of sub-cells; determining the transmission mode for a terminal on the basis of channel states between at least two of the plurality of sub-cells and the terminal; and transmitting data for each sub-cell to the terminal through at least one virtual transmission port connected to a corresponding sub-cell on the basis of the determined transmission mode.

Abstract: A method and apparatus are provided for determining channel quality in a wireless communication system. The method includes receiving Channel Quality Information (CQI) from a receiver; generating a channel quality reference value by correcting the received CQI using first resource use/nonuse information received from a scheduler that indicates whether an adjacent cell used resources at a previous time, and received signal power information measured in the adjacent cell; and determining a channel quality value at a current time using the generated channel quality reference value and second resource use/nonuse information received from the scheduler that indicates whether an adjacent cell uses resources at the current time.

Abstract: Methods and apparatus are provided for controlling interference by a TP in a wireless communication system. A first message, which includes channel quality information for the TP, is received from a terminal to which the TP provides a communication service. A second message, which includes received power information for a reference signal received from the terminal, is received from at least one neighbor TP. A data transmission rate is determined for the terminal based on the channel quality information and the received power information.

Abstract: An apparatus and method for power control of a mobile BS of variable backbone capacity. The method includes determining a link state and capacity of a backbone of the BS, and determining a link state and service capacity between the BS and a mobile communication terminal. The method also includes, if the capacity of the backbone is less than the service capacity, setting the backbone capacity similar to the service capacity by lowering a transmit power of the BS by a predefined value.

Abstract: A method and an apparatus for FA switching in a wireless communication system are provided. The apparatus includes a base station for broadcasting a neighbor list, which includes a base station identifier, an FA identifier, and a preamble index corresponding to a first FA, and neighbor base station information, to mobile stations that the base station provides a service for, one of, unicasting a scanning indication message for the first FA to each of the mobile stations and broadcasting the scanning indication message to the mobile stations, for temporarily switching a second FA, which is being currently used, to the first FA, for transmitting a preamble signal corresponding to the first FA to the mobile stations by using the FA identifier and the preamble index during a preset scanning time interval, and for switching the second FA to the first FA according to a scanning result received from the mobile stations in response to the scanning indication message.

Abstract: A transmission method and apparatus are provided for use in a wireless communication system in which a cell includes a plurality of sub-cells. A Transmission Point (TP) in the wireless communication system includes a transmitter configured to transmit a signal to each of the plurality of sub-cells through a plurality of antennas; a receiver configured to receive uplink control information from a User Equipment (UE) located within at least one of the plurality of sub-cells; and a controller configured to determine a virtual matrix for each of the plurality of sub-cells, to select a precoding matrix according to the virtual matrices of the plurality of sub-cells, to determine a cooperative transmission mode or a normal transmission mode, based on the received uplink control information, and to control the transmitter to perform downlink transmission on a sub-cell basis through the virtual matrices of the sub-cells according to the determined transmission mode.

Abstract: An apparatus and method for controlling an inter-cluster interference in a multi cell network are provided. The method includes collecting cluster information in order to cluster base stations into at least one cluster; clustering the base stations into at least one cluster by using at least one of a dynamic clustering method and a hierarchical clustering method, based on the cluster information, determining a cluster boundary base station, which satisfies a predetermined condition, among base stations in a cluster, and controlling the inter-cluster interference.

Abstract: An apparatus and method provide load balancing in a multi-cell wireless access system. The method includes determining a change value of a TX power, determining a handover candidate set including at least one MS to be handed over, calculating expected gains after TX power control for each MS classification, and determining whether to control the TX power based on the expected gains. The change value is zero or a positive real number.

Abstract: An apparatus and method perform Transmit Power Control and Dynamic Frequency Selection (TPC/DFS) during a movement of a Base Station (BS). A network environment around the mobile BS is modeled. Based on the modeling result, a TPC/DFS operation scheme that is most suitable to the mobile BS is selected.

Abstract: An apparatus and method for power control of a mobile BS of variable backbone capacity. The method includes determining a link state and capacity of a backbone of the BS, and determining a link state and service capacity between the BS and a mobile communication terminal. The method also includes, if the capacity of the backbone is less than the service capacity, setting the backbone capacity similar to the service capacity by lowering a transmit power of the BS by a predefined value.

Abstract: A method and an apparatus select optimized Frequency Allocation (FA) in a mobile communication system that includes mobile base stations. A first control information is received from neighbor base stations. System capacities of the respective neighbor base stations are determined based on the first control information. The FA that maximizes a sum of the system capabilities of the respective neighbor base stations is selected. Therefore, the method has an advantage of securing maximum capacity by adaptively setting FA with consideration of radio environments of neighbor base stations during network entry of a new mobile base station or during an operation of a mobile base station.