Abstract:
적어도 두 개의 주파수 대역을 사용하는 다중 홉 릴레이 방식의 셀룰러 네크워크에서 다중링크를 지원하기 위한 장치 및 방법에 관한 것으로서, 부프레임의 제 1 주파수 대역은, 단말 또는 중계국이 기지국의 통신을 수행하기 위한 링크의 부프레임을 구성하는 과정과, 상기 부프레임의 제 2 주파수 대역은, 상기 기지국 또는 중계국이 단말의 통신을 수행하기 위한 링크의 부프레임을 구성하는 과정을 포함하여, 부프레임 내의 다중 링크간의 간섭 회피와 자원 활용의 유연성, 단말의 핸드오프 및 셀 검색의 용이성 및 선진 기술의 적용의 용이성과 중계기의 동작 전환 갭 오버헤드의 감소 등의 이점이 있다. 다중 홉, 릴레이, 두 개의 주파수 대역, 프레임 구조, 부프레임 구조
Abstract:
본 발명은 다중 홉 릴레이 방식을 사용하는 광대역 무선 접속 통신 시스템에서 레인징 메시지 중계 장치 및 방법에 관한 것이다. 구체적으로는 레인징 메시지 중계 장치('중계국'이라고도 한다)가 단말기로부터 수신한 레인징 요청 메시지를 일정한 방법으로 처리한 중계 레인징 요청 메시지를 서빙기지국으로 요청하며 상기 서빙기지국은 수신한 상기 중계 레인징 요청 메시지를 처리하여 중계 레인징 응답 메시지를 중계국으로 전송하고 이를 수신한 중계국이 자신이 처리한 정보와 서빙기지국으로부터 수신한 중계 레인징 응답 메시지를 조합한 레인징 응답 메세지를 생성하여 단말로 전송하는 레인징 메시지 중계 장치 및 방법에 관한 것이다. 중계국, 레인징 요청 메시지, 레인징 응답 메시지, 서빙 기지국, 다중 홉 릴레이
Abstract:
A method for supporting FBSS(Fast Base Station Switching) in a multi-FA(Frequency Allocation) wireless communication system is provided to offer services to MSs(Mobile Stations) seamlessly by supporting FBSS in a wireless communication system which uses a plurality of FAs. A first BS(Base Station), which operates two FAs, transmits neighbor BS information to an MS through FA 1 having BSID 1(305). The MS executes scanning, based on the neighbor BS information(307). Then, if the MS transmits a diversity set update request message to request the first BS to update a diversity set(309), the first BS exchanges FBSS-associated backbone information with neighbor BSs(311). Then the first BS transmits a diversity set update response message to the MS(313). Receiving the diversity set update response message, the MS transmits a diversity set update indication message to the first BS through FA 1(315). Using a CQI(Channel Quality Indicator) channel allocated through FA 1, the MS monitors the FAs contained in the diversity set. As a result, if it is judged that switching to one of the FAs is required, the MS transmits a switch indication message to the first BS through the CQI channel(319). In this case, the switch indication message contains the BSID information of a new FA. On the assumption that the new FA is the second BS's FA 1 having BSID 3, the first BS informs the second BS that the MS will execute switching to FA 1 having BSID 3(321).
Abstract:
An apparatus and a method for negotiating a frame offset between a base station and a relay station in a multi-hop relay broadband wireless access communication system are provided to allow a base station and a relay station to share a frame offset so that the base station can transfer a particular broadcast message to the relay station, and the relay station can transmit data to a terminal at an accurate time. A base station receives a connection request from a relay station(301). When the initial connection of the relay station is detected, the base station determines a frame offset to be allocated to the connected relay station with reference to a frame offset of relay stations managed by the base station(303). The base station generates a connection response message including the determined frame offset information(305) and transmits a connection response message including the frame offset information to the relay station(307).
Abstract:
본 발명은 가변 부호화율을 가지는 블록 저밀도 패리티 검사(LDPC, Low Density Parity Check) 부호화 방법에 있어서, 소정 개수의 부호화율에 대하여 소정 개수의 LDPC 부호를 설계하고, 상기 소정 개수의 LDPC 부호의 정보 노드 차수를 비교하여 절단 패턴을 생성하는 과정과, 상기 절단 패턴을 사용하여 상기 소정 개수의 LDPC 부호의 검사 노드 차수를 일치시키는 과정과, 상기 일치된 검사 노드의 차수가 산출되면, 상기 일치된 검사 노드 차수에 상응하게 소정 개수의 천공 패턴을 생성하는 과정과, 상기 생성된 천공 패턴 각각에 대해 미리 주어지는 제1조건을 만족하는지 확인하는 과정과, 상기 소정 개수의 천공 패턴 중 상기 제1조건을 만족하는 천공 패턴을 상기 가변 부호화율의 천공 패턴으로 결정하는 과정을 포함한다. 가변 부호화율, 모 패리티 검사 행렬, 자 패리티 검사 행렬, 천공 방식, 절단 방식, 단축 방식, 블록 LDPC 부호
Abstract:
An apparatus and a method for scanning in a broadband wireless access communication system using multi-hop relay are provided to provides the same service and function between an MSS(Mobile Subscriber Station) and a BS(Base Station), reduce a difference between systems that may be caused by dual signaling between an RS(Relay Station) and the MSS and between the RS and the BS, and match synchronization of a system operation. A message processing unit(811) processes a scan request message received from an MSS. A message generating unit(813) generates a scan response message corresponding to a scan command message including a scanning guide from a BS. An interface module(821) transmits the message from the message generating unit via an antenna. The scanning guide is one of a terminal scan refusal, a terminal scan instruction, and a terminal scan notification. If the scanning guide is the terminal scan instruction, a scan command message including information about a scan schedule and a scan result report required for the MSS is received. If the scanning guide is the terminal scan refusal, a scan section is set as zero and a scan response message is transmitted to the MSS. A control unit(819) provides the message processing unit with a control message received from the MSS or the BS. In addition, the control unit receives a message which is supposed to be transmitted to the MSS or the BS, and then transmits the message to the interface module.
Abstract:
A device for supplying a relay service in a multi-hop relay type broadband wireless access communication system and a method are provided to offer synchronized synchronous channels and services to a terminal and relay stations by using consecutive two frames, thereby easily performing a cell searching process for synchronization and handover in accordance with mobility of the terminal. A subframe for terminal link with a base station and a subframe for terminal link with a relay station are configured during the first section(701) of a subframe(700) in the ith frame. A subframe for 1-hop relay station link with a base station, a subframe for odd-numbered hop relay station link with an even-numbered hop relay station, and a subframe for terminal link with an end hop relay station are configured during the second section(703) of the subframe(700) of the ith frame. A subframe for terminal link with the base station and a subframe for terminal link with the relay station are configured during the first section(411) of a subframe(410) of the (i+1)th frame. A subframe for terminal link with the base station and a subframe for odd-numbered hop relay station link with the even-numbered hop relay station are configured during the second section(413) of the subframe(410) of the (i+1)th frame.
Abstract:
An apparatus and a method for generating a synchronization channel for a RS in a wireless communication system are provided to generate a synchronization channel for the RS by using a sequence value of a synchronization channel and a sequence value of a common mask transmitted from a BS(Base Station) to each MS, thereby lowering complexity in generating the synchronization channel by enabling a downlink synchronization channel transmitted from the BS to the each MS to be separated from the synchronization channel for the RS. A method for generating a synchronization channel for a RS(Relay Station) in a wireless communication system using a multi-hop relay method comprises the following steps of: checking a sequence of a synchronization channel for an MS(Mobile Station) and a predetermined length of a preset sequence(a common mask)(701,703); and generating a sequence of a synchronization channel for the RS by performing XOR operation for the sequence of the synchronization channel for the MS and the predetermined length of the sequence(705).
Abstract:
A periodic ranging system in a sleep mode of a communication system and a method are provided to support periodic ranging operation of an MS(Mobile Station) operated in a sleep mode, thereby offering reliable communication as realizing minimum power consumption and ensuring backward compatibility. A base station checks whether a periodic ranging period comes(611). If so, the base station carries out periodic ranging operation with a corresponding MS(613), and decides whether a time for completing the periodic ranging operation comes(615). If so, the base station transmits an RNG(Ranging)-RSP(Response) message including a next periodic ranging IE(Information Element) to the MS(617). The base station completes the periodic ranging operation with the MS(619).
Abstract:
An apparatus and a method for supporting optimized network reentry procedures in a multi-hop relay BWA(Broadband Wireless Access) communication system are provided to execute optimized network reentry procedures between an RS(Relay Station) and an MS(Mobile Station) by defining the signaling between the RS and a BS(Base Station) in providing MS information to the RS when the MS executes handover. An RS receives an HO(HandOver)-notify message, which indicates the handover of an MS, from a BS(711). The RS executes optimized network reentry procedures with the MS by using information contained in the received HO-notify message(713). While executing the optimized network reentry procedures, the RS judges whether additional MS information is necessary in executing the optimized network reentry procedures(715). If it is judged that additional MS information is necessary, the RS transmits an MS information request message to the BS in order to request additional MS information(717). Then, the RS confirms whether an MS information response message is received from the BS(719).