Information feedback method for coordinated multipoint communication

摘要

Coordinated multipoint communication is a technology for improving cell-edge performance for users in a cell-type mobile communication system. In order to enable a coordinated multipoint transmission/reception operation, a user equipment report of a local environment is required to select both coordinated communication modes and communication partners in evolved Node B (eNB) base stations. According to the present invention, a method is described for feeding back information from User Equipment (UE) to a serving base station to enable a coordinated multi-point transmission/reception operation. The information reported through the feedback is classified into two categories corresponding to received signal intensity information and received signal timing information. The UE may select one or both types of information from between the categories to provide feedback. In embodiments of the present invention, various overhead-reducing reporting formats are described.

主权项

1. A feedback method of a terminal for supporting coordinated multipoint processing in a mobile communication system, the method comprising:
generating a measurement report message including delay information of a first signal received from a candidate transmission point and power allocation information for the candidate transmission point determined based on information on a received signal power corresponding to the first signal; transmitting the measurement report message to a serving transmission point; and receiving a second signal transmitted by a cooperative transmission point selected among the serving transmission point and the candidate transmission point, based on the measurement report message, wherein the delay information comprises information on whether a delay per the received first signal from the candidate transmission point is greater than a threshold value, wherein the threshold value is determined based on a cyclic prefix of the serving transmission point, wherein the delay corresponding to the selected cooperative transmission point is less than the threshold value, wherein the power allocation information is quantized based on information on a received signal power corresponding to the serving transmission point, and wherein a boosting value of the quantized power allocation information is determined based on a transmission power of the serving transmission point.