Abstract:
PURPOSE: A relay method of a base station and a terminal is provided to execute a role of a relay station by setting a relay link between a base station and a neighbor base station. CONSTITUTION: When a backhaul link of a first base station is damaged, a downlink channel is scanned(S210). A second base station connected to the backhaul link is established(S220). A downlink parameter or an uplink parameter is acquired(S230). A ranging process is executed(S240). An operating parameter which is necessary for a relay link is comprised(S270). [Reference numerals] (S210) Scanning a downward link channel; (S220) Synchronizing with a base station connecting to a backhaul link; (S230) Acquiring a DL/UL parameter; (S240) Ranging; (S250) Certification, authorization, and password exchange; (S260) Re-registration; (S270) Operating parameter composition
Abstract:
PURPOSE: A terminal relay method is provided to offer smooth communication works by enabling a terminal to execute a base station or a relay station role. CONSTITUTION: A terminal reports the capability of the terminal for a relay station role to a base station(S410). The terminal reports the capability in an initial access process. The terminal executes the relay station role(S420~S450). A role of the relay station is determined by the base station. The terminal receives a relay setup request message from the base station. The terminal transmits the relay setup response message to the base station. [Reference numerals] (S410) Reporting the capability of a terminal; (S420) Executing a relay link setting; (S430) Concluding a relay link setting; (S440) Managing a relay link; (S450) Releasing a relay link
Abstract:
PURPOSE: An apparatus and method for feedback in a wireless mesh system are provided to reduce overheads by providing an HARQ(hybrid automatic repeat request) feedback channel for the wireless mesh system. CONSTITUTION: Data is received in a first sub frame. An HFBCH(HARQ feedback channel) is selected to transmit ACK/NACK(acknowledgement/not-acknowledgement) of the data in a second sub frame corresponding to the first sub frame. The ACK/NACK of the data is transmitted in the selected HFBCH. The HFBCH which can be transmitted from the second sub frame has a mapping relation with an LRU(logical resource unit) of the first sub frame. The first sub frame and the second sub frame are included in a frame which can transmit scheduling information and the data.
Abstract:
PURPOSE: A multicast transmission method and apparatus are provided to transmit the resource allocation information of a data burst to a plurality of terminals using a map information element. CONSTITUTION: A base station transmits the resource allocation information of a data burst using the map information element of a map(S202). After the base station transmits the resource allocation information of the data burst to a plurality of terminals using a broadcast allocation a-map, the base station transmits the data burst(S204). The base station transmits the resource allocation information of the data burst to the plurality of the terminal using the broadcast allocation a-map. The base station repeats the re-transmission process of the data burst according to the number of the re-transmission(S206~S216). [Reference numerals] (AA) 1st re-sending; (BB) 2nd re-sending; (CC) N-th re-sending; (S202) Broadcast allocation A-MAP(maximum re-sending number); (S204,S208,S212,S216) Data burst transmission; (S206,S210,S214) Broadcast allocation A-MAP
Abstract:
PURPOSE: A communication method in a wireless mesh network and an apparatus supporting the same are provided to increase the performance of a capacitor and improve a BER(bit error rate) of a link by minimizing MUI(multi-user interference) of a wireless mesh network based on OFDMA(orthogonal frequency-division multiple access). CONSTITUTION: The number of the other nodes is obtained(S750). A cost parameter is obtained based on BER, a capacitor, and the number of nodes(S760). A weight factor is applied to the cost parameter. The weighted link cost parameter is obtained(S770). A routing path is set up based on the minimum cost routing algorithm(S790). [Reference numerals] (S710) Measuring d_ij between nodes; (S730) SINR calculation on a receipt terminal; (S740) Link BER calculation; (S750) Measuring the number of neighboring node; (S760) Obtaining a cost parameter; (S770) Calculating weighted link cost; (S780) Determining cost between nodes?; (S790) Setting up an optimum routing path by using a Minimum cost routing algorithm
Abstract:
본 발명은 이동통신 시스템의 자동 재전송 요구를 이용한 데이터 송수신 방식에서의 중첩 문제 해결 방법에 관한 것이다. 본 발명은 데이터를 블록 단위로 분할한 뒤 윈도우 범위 내에 위치한 데이터 블록을 송출하여 ACK 또는 NACK를 수신하고, 송출하지 않은 데이터 블록에 대한 ACK가 수신되면 기송출된 데이터 블록에 대한 폐기를 요청하는 폐기 메시지를 생성하여 송출하는 데이터 전송 방법을 제공한다. 또한, 본 발명은 데이터 블록이 수신되면, 수신된 데이터 블록에 대한 ACK 또는 NACK를 생성하여 송출하고, 폐기 메시지가 수신되면 수신된 데이터 블록을 폐기하는 데이터 수신 방법을 제공한다. 본 발명에 따르면, 전송하려는 SDU 블록의 숫자가 ARQ_WINDOW_SIZE보다 많은 경우, 발생되는 BSN의 중첩 문제를 해결할 수 있으며, 기존의 리셋 과정에서 발생되던 자원 낭비 및 시간 지연의 문제점을 해결할 수 있다. ARQ, BSN, Discard, Window Start Advance, 폐기 메시지
Abstract:
지속 할당 정보 전송 방법에서, 기지국이 이동국에 할당한 지속 자원이 변경되는 경우에 변경 카운터의 값을 변경한다. 그리고 기지국은 변경된 지속 자원에 대한 지속 할당 정보와 변경된 변경 카운터를 전송한다. 지속 할당, 변경 카운터, 식별자, 맵, NACK
Abstract:
PURPOSE: An operational method which uses a default low duty operation in a femto cell system is provided to effectively transmit a default LDM(Low Duty operation Mode) pattern of a femto cell base station in a mobile wireless connection system supporting a femto cell. CONSTITUTION: A terminal transmits network join request information to a femto BS(Base Station)(S310). Corresponding to the network join request information, the femto BS to the terminal(S320). The femto BS enters a LDO(Low Drop Output) mode(S330). If the femto BS enters the LDO mode, the terminal receives operation mode notification information from the femto BS(S340). The terminal performs UL communication(S350).
Abstract:
PURPOSE: A transmitting method of a multicast broadcast service is provided to effectively and continuously manage an MBS in a mobile wireless connection system supporting the MBS. CONSTITUTION: MBS setting information including information about MBS MAP and information about MBS area, which MBS related information is allocated, is transmitted to a terminal(S100~S110). MBS data is transmitted to the terminal through MBS area. Information about the MBS area includes location information of the MBS area and a transmission parameter. MBS setting information change director directs whether the MBS setting information is converted from a first MBS setting information into a second MBS setting information.