Abstract:
그룹 기반 통신 기법을 이용한 기지국과 단말들 사이의 통신 방법이 개시된다. 본 발명은 고정된 위치에 설치된 복수의 단말들을 복수의 그룹들로 그룹화하고, 복수의 그룹들 각각에게 고유한 상향 링크 자원을 할당함으로써, UL-MAP 오버헤드를 감소시키고 데이터 전송을 위한 자원을 최대로 활용하는 기술을 제공한다.
Abstract:
단말의채널상태또는이동성에따라협력멀티포인트송/수신또는단일포인트송/수신중 어느하나가적용된다. 채널상태의변화가클수록협력멀티포인트송/수신에따른이득은감소하는반면, 피드백오버헤드는증가하므로, 단일포인트송/수신이선호되며, 채널상태의변화가작은경우, 협력멀티포인트송/수신이선호될수 있다. 또한, 단일포인트송/수신을위한마진타임및 협력멀티포인트송/수신을위한마진타임은단말의이동성에따라적절히조절될수 있다.
Abstract:
PURPOSE: A multi-point cooperation method which considers delay in wireless communication system is provided to remove the interference between a UL cooperative domain and a non-cooperative domain by scheduling uplink cooperative terminals having similar delay property in the uplink cooperation. CONSTITUTION: UL(UpLink) cooperative terminals(520,522) transmits UL cooperative data to a serving BS(Base Station)(510) and a cooperative BS(530). The serving BS receives delay property of the UL cooperative terminals, and schedules the UL cooperative terminals. The UL cooperative terminals adopt a frame structure. A non-cooperative terminals(542) adopt a frame structure. The non-cooperative terminals transmit frame structure-adopted UL cooperative data to the cooperative BS.
Abstract:
PURPOSE: A communication system for adaptively applying single point transceiving or multi point transceiving is provided to adaptively select one of cooperative multi transceiving or single point transceiving to a target terminal based on a channel state or mobility of the target terminal. CONSTITUTION: A determining unit(1330) determines at least one of margin time for single point transceiving or a margin time for cooperative multi point transceiving based on information related to a channel state of a target terminal. A processing unit(1340) performs at least one of the single point transceiving or the cooperative multi point transceiving. The processing unit performs the transceiving in consideration of margin time for the single point transceiving and margin time for the multi point transceiving.
Abstract:
PURPOSE: A dynamic grant request apparatus and a method thereof in a communication network which supports object communication are provided to perform a dynamic grant request in consideration of object communication devices. CONSTITUTION: A base station(400) allocates a contention-based grant request resource to object communication devices(420)(S600). The object communication devices transmit a message which requests grant for uplink transmission to the base station(S610). The base station transmits grant for data transmission to the object communication devices(S620). The object communication device transmits data to be transmitted to the base station(S630). [Reference numerals] (400) Base station; (420) Object communication device; (S600) Allocating a contention-based grant request resource; (S610) Grant request message; (S620) Grant allocation; (S630) Data transmission
Abstract:
PURPOSE: A random access performing method in a communication network and a method thereof are provided to rapidly recognize collision time between fixed communication devices. CONSTITUTION: A terminal transmits a scheduled message to a base station(S430). The terminal opens the operation of a contention solution timer(S440). The base station transmits contention solution message to the terminal(S460). The terminal stops the contention solution timer in case the contention solution message is successfully received(S470, S480).