Patent ID: 8583134

Claim:
A method for adaptive coordinated transmission in a wireless communication system, wherein the wireless communication system comprises more than one receiver and more than one transmitter for performing coordinated transmission, one of the more than one transmitter is set as a serving transmitter, and others of the more than one transmitter are set as cooperating transmitters, the method comprising: receiving, by a cooperating transmitter, a cooperation request sent by the serving transmitter, determining, by the cooperating transmitter, a cooperation mode based on measured signal parameters of the more than one receiver after receiving the cooperation request sent by the serving transmitter, and providing, by the cooperating transmitter, the cooperation mode to the serving transmitter; generating, by each transmitter, data stream corresponding to the more than one receiver according to the cooperation mode determined, and transmitting the data stream to each of the more than one receiver; wherein determining a cooperation mode comprises calculating, by each of the cooperating transmitters, signal to interference ratio (SIR) and signal to noise ratio (SNR) according to the measured signal parameters, and selecting the cooperation mode according to a relationship between the SIR calculated and a SIR threshold and according to a relationship between the SNR calculated and a SNR threshold; wherein selecting the cooperation mode according to the relationship between the SIR calculated and the SIR threshold and according to the relationship between the SNR calculated and the SNR threshold comprises when the SIR calculated is smaller than the SIR threshold and the SNR calculated is larger than a first SNR threshold, selecting a dynamic fractional frequency reuse (FFR) mode, when the SIR calculated is not smaller than the SIR threshold and the SNR calculated is not smaller than a second SNR threshold, selecting a multi-user multi-eNB spatial multiplexing mode, wherein a partial data stream from each transmitter to the receiver is different from each other in the multi-user multi-eNB spatial multiplexing mode, and otherwise, selecting a single-user multi-eNB spatial multiplexing mode or a multi-user multi-eNB macro diversity mode, wherein a partial data stream from each transmitter to the receiver is set to be the same in the multi-user multi-eNB macro diversity mode.