Patent ID: 8879473

Claim:
A method for multi-site multi-user joint transmission, comprising: measuring, by a user terminal, a downlink channel originated from each base station; according to the measurement for the downlink channel, quantizing and obtaining, by the user terminal, per-site channel information for the each base station and additional inter-site channel information, said additional inter-site channel information being used for calculating joint channel information for multiple base stations; and feeding back, by the user terminal, the per-site channel information for the each base station and the additional inter-site channel information so that the base station performs scheduling to execute the multi-site multi-user joint transmission; wherein said per-site channel information comprises per-site channel direction information and per-site channel quality information; wherein said additional inter-site channel information comprises inter-site relative phase information, inter-site relative amplitude information and additional channel quality information; wherein said joint channel information comprises joint channel direction information and joint channel quality information; wherein the joint channel direction information for the multiple base stations is synthesized according to the per-site channel direction information, the inter-site relative phase information and the inter-site relative amplitude information for the multiple base stations.