Abstract:
본 발명에서는 다중 안테나 적용 통신 시스템에서 부분 간섭 정렬에 있어서, 다수의 AP-STA 쌍이 존재하는 채널환경에서, 많은 수의 간섭원을 정렬시키기 위해 안테나의 수가 필요 이상으로 많이 필요하게 되는 경우, 실시간 간섭 채널 정보, 경로손실, 인접 채널 간섭(ACI) 등을 고려하여 간섭 정렬을 수행할 후보군을 결정하고, 후보군으로 선택되지 못한 노드들과 간섭 정렬을 수행하는 후보군으로 선택된 노드들에 대해 간섭을 최소화할 수 있는 대응되는 프리코딩을 수행하여 송수신함으로써 네트워크간 간섭 영향을 줄일 수 있도록 한다.
Abstract:
PURPOSE: A transceiving method of a second user in a recognition wireless network is provided to offer a stable communication service to second users located in an outer region of a cell. CONSTITUTION: A second transmitter determines transmission power in consideration of a sensing error after calculating output probability of a first transmitter(S304). When the second transmitter transmits(S306) a packet to a receiver of a second user with the determined transmission power, a second relay and a second receiver receive a packet(S308,S310). When demodulation of the receiver of the second user is successful(S316), the second transmitter broadcasts a reception success signal to the second relay(S318). When demodulation of the receiver of the second user is failed(S316), the second transmitter broadcasts a reception failure signal(S320) and the second relay retransmits a packet to the second receiver(S324). [Reference numerals] (210) Second transmitter; (220) Second receiver; (230) Second repeater; (AA) Packet transmission; (BB) ACK transmission; (CC,GG) Yes; (DD,FF) No; (EE) NACK transmission; (S302) First transmitter output calculation; (S304) Sensing error consideration power transmitter decision; (S308,S310) Packet receiver; (S312) Packet save; (S314) Demodulation; (S316) Demodulation success?; (S322) NACK received?; (S324) Repeat packet request