Abstract:
The present invention relates to a method for forming a wireless backhaul link of a mobile station (MS) in a wireless communication system, comprising: a process for obtaining system information on an existing base station which transmits a first code and a new base station which transmits a second code; a process of reporting the system information on the new base station to the existing base station; and a process of receiving that the new base station discards the second code and uses the first code from the existing base station. The first code indicates that a corresponding base station has been installed already. The second code indicates that the corresponding base station has been newly installed. [Reference numerals] (410) Base station #1; (420) Base station #2; (511) Executing scan operation; (513) Executing Ncode; (515) New installation/power on; (517) Tcode transmission; (519) Ncode/Tcode detection; (521) SI detection for base station #1(410) and base station#2(420); (523) Random access code transmission; (525) Executing a network entry procedure; (527) Transmitting a new base station information report message; (529) Determining FLCP execution; (531) Transmitting an FLCP start code transmission request message; (533) FLCP start code transmission; (535) FLCP execution; (537) Wireless backhaul link formation; (539) T code disuse or N code usage notification of base station#2(420); (541) T code disuse or N code usage
Abstract:
통신 시스템에서 송신기는, 수신기로부터 다수개의 채널들에 대한 채널 품질 정보와, 상기 다수개의 채널들 중 임계값 이상의 채널 상태를 갖는 적어도 하나의 채널을 지시하는 채널 지시자 정보를 피드백 받고, 상기 채널 품질 정보에 상응하여 상기 수신기로 송신할 신호들을 부호화 및 변조화하고, 상기 채널 지시자 정보를 근거로 상기 다수개의 채널들 중 상기 임계값 이상의 채널 상태를 갖는 적어도 하나의 채널을 식별하고, 저밀도 패리티 검사(Low Density Parity Check: LDPC) 부호의 변수 노드에 대한 차수 분포를 기반으로, 상기 부호화 및 변조화된 신호들을 각각 해당 변수 노드의 차수에 따라 다수개의 그룹으로 분류하고, 상기 LDPC 부호의 검사 노드 및 변수 노드의 차수 분포와 상기 다수개의 그룹 별 신호들의 개수를 기반으로, 상기 적어도 하나의 채널 중 상기 다수개의 그룹의 신호들 각각을 송신하기 위해 사용할 채널을 결정하고, 상기 결정된 채널을 사용하여 상기 다수개의 그룹의 신호들 각각을 상기 수신기로 송신한다. LDPC 부호, 단일 부호, 분산 부호
Abstract:
PURPOSE: A synchronization acquisition method and apparatus thereof are provided to reduce interference between the terminals which receive services from an infrastructure of a neighbor area and a terminal in an environment where the infrastructure is not operated. CONSTITUTION: When a transmission unit(404) does not receive a preamble signal from a BS(base station), the BS transmits the first preamble signal to a synchronization point. A control unit(402) synchronizes with one or more neighbor terminals by using the first preamble signal. The control unit communicates with the one or more neighbor terminals. The first preamble signal implicitly indicates a result which the BS is collapsed. The first preamble signal is transmitted to a point which is the same as a preamble transmission point of the BS. [Reference numerals] (400) Reception unit; (402) Control unit; (404) Transmission unit; (406) Storage unit
Abstract:
PURPOSE: An uplink power control method and an apparatus thereof in a wireless communication system are provided to control uplink power between cells in a central control method. CONSTITUTION: A control unit(1000) determines an uplink power value by using received average interference. The control unit transmits an uplink signal to a downlink to a downlink base station. A receiving unit(1020) receives the amount of the average interference according to the control of the control unit. A memory(1030) stores the amount of the average interference according to the control of the control unit. A transmitting unit(1010) transmits the uplink signal to a first base station.
Abstract:
PURPOSE: An apparatus for supporting high speed mobile terminal in a distributed antenna system and a method thereof are provided to embody high data transmission rate while lowering power consumption. CONSTITUTION: A base station performs grouping for new terminal based on location speed information(1210). The base station calculates in-cell service end timing about the corresponding terminal or the terminal group. The base station calculates service handover timing about the next adjacent antenna node(1214). The base station acquires information for the terminal or the terminal group from a central controller or the previous adjacent antenna node(1216). The base station performs communication service(1218).
Abstract:
PURPOSE: A cell selection method and an apparatus thereof are provided to enable a terminal to select a serving cell in consideration of signal strength of a base station. CONSTITUTION: A MS(Mobile Station) receives a loading index about each base station(414). The base station measures RSSI(Received Signal Strength Indication) information about the base station(416). The MS selects the base station by using signal strength information(418). The MS connects the selected base station(420).
Abstract:
PURPOSE: A method and an apparatus for transmitting and receiving uplink signals in a wireless communication system are provided to successfully decode uplink signals of each mobile terminal using an orthogonal encoding code pilot. CONSTITUTION: An identifier used for a contention-based uplink channel is received from a base station. A contention-based uplink channel list is received from the base station. One is selected among uplink channels included in the received contention-based uplink channel list. The uplink signal transmitted to the base station is created. The uplink signal is transmitted to the base station using a selected uplink channel. The uplink signal comprises a control information symbol group.
Abstract:
PURPOSE: A hybrid automatic retransmission request operation method in a wireless mobile communications system is provided to flexibly execute a HARQ transmission operation by flexibly configurating a HARQ operation timing. CONSTITUTION: A transmitting end transmits data burst allocation information and DL data burst through a DL frequency band in the first DL sub-frame(300) of i-th frame. A receiving end transmits HARQ feedback through a UL frequency band in 5th UL sub-frame(310) of i-th frame. The retransmission of data burst according to the HARQ feedback is executed in the first DL sub-frame(320) of the i+1 frame with the transmitting end. The feedback for the retransmission is executed in the fifth DL sub-frame(330) of the (i+1)-th frame.
Abstract:
본 발명은 저밀도 패리티 검사 부호를 사용하는 통신 시스템에서 채널 인터리링/디인터리빙 장치 및 그 제어 방법에 관한 것으로서, 이러한 본 발명은 저밀도 패리티 검사(LDPC; Low Density Parity Check) 부호를 사용하는 통신 시스템에서, 정보 데이터 비트들이 입력되면, 상기 정보 데이터 비트들을 미리 설정되어 있는 부호화 방식으로 부호화하여 LDPC 부호어로 생성하고, 상기 LDPC 부호어를 미리 설정되어 있는 채널 인터리빙 규칙에 상응하게 인터리빙한 후, 상기 채널 인터리빙된 LDPC 부호어를 미리 설정되어 있는 변조 방식으로 변조하여 변조 심벌로 생성하는 것을 특징으로 한다. LDPC, 채널 인터리버, 변수 노드, 검사 노드, 채널 디인터리버, 변조 심벌
Abstract:
An apparatus and a method for configuring a sub channel in a cellular system based OFDMA are provided to obtain a high free degree which is a ratio of the first reuse coefficient to the second reuse coefficient. A method for configuring a sub channel in a cellular system based OFDMA includes a process of dividing the entire band by a resource unit. The method of configuring the sub channel performs common permutation by grouping the divided resource units. The method of configuring the sub channel comprises a process of dividing resources about the common permutation according to the first reuse coefficient. The first permutation and the second permutation are performed according to the first sub channel divided according to the first reuse coefficient to the second sub channel and the first reuse coefficient.