Coordinated communication method using multiple terminals

摘要

A method including receiving a signal from a terminal; measuring channel state information (CSI); comparing the CSI to determine whether to decode the received signal; and if it is determined to decode the received signal, removing noise by decoding the received signal, and then performing decode and forward (DAF) in which the signal is re-encoded, and if it is determined not to decode the received signal, performing amplify and forward (AAF) in which the received signal is amplified. The CSI may be at least one of a frame error rate (FER), a bit error rate (BER), a signal to noise ratio (SNR), and a signal to interference plus noise ratio (SINR). Accordingly, a time delay consumed for channel decoding in hybrid DAF coordinated communication is decreased, data transmission and resource usage is more effectively achieved in coordinated communication using multiple terminals, and unnecessary power consumption is decreased.

主权项

1. A method of performing coordinated communication by a relay station, the method comprising:
receiving a signal from a terminal, wherein the signal is encoded into a low density parity check (LDPC) code; measuring channel state information (CSI) indicating a state of a channel which receives the signal; comparing the CSI with a predetermined threshold to determine whether to decode the received signal; when it is determined to decode the received signal, removing noise by decoding the received signal, and then performing decode and forward (DAF) in which the signal is re-encoded and transmitted to a base station, and when it is determined not to decode the received signal, performing amplify and forward (AAF) in which the received signal is amplified and forwarded to the base station, wherein an interference canceller is operated when the signal is amplified and forwarded to the base station; and determining a frame error rate (FER), a bit error rate (BER), a signal to noise ratio (SNR), and a signal to interference plus noise ratio (SINR), wherein the FER is determined according to the SNR, and compared with an FER table of the LDPC code, and wherein the CSI is at least one of the FER, the BER, the SNR, and the SINR.