Patent ID: 9461718
Filing Date: 2016-10-04
CPC Classification: H04B,H04L

Claim Text:
1. A method for transmitting channel quality information from a user equipment in a wireless communication system that supports coordinated multiple point transmission and reception (CoMP), the method comprising: receiving CoMP configuration information from a serving transmission point, wherein the CoMP configuration information indicates which transmission point is a data transmission point or a beam avoidance point among a plurality of transmission points belonging to a first CoMP set comprising one or more data transmission points and one or more beam avoidance points; receiving first downlink signals from the one or more data transmission points belonging to the first CoMP set and second downlink signals from the one or more beam avoidance points; generating first channel quality information by calculating combined estimation SINR (Signal to Interference and Noise Ratio) per downlink subband among N downlink subbands, wherein the combined estimation SINR per downlink subband is calculated by regarding the first downlink signals as effective signals, the second downlink signals as interference signals and received signals from cells other than the plurality of transmission points belonging to the first CoMP set as noise signals; selecting M downlink subbands (N>M>l, M, N are integers) among N downlink subbands according to the first channel quality information; and transmitting second channel quality information of each transmission point belonging to the first CoMP set on the M downlink subbands to the serving transmission point respectively, wherein the second channel quality information is calculated by using measurement strengths of the first or second downlink signal received from each transmission point belonging to the first CoMP set on the M downlink subbands and the noise signals, the noise signals only including received signals from cells other than the plurality of transmission points belonging to the first CoMP set.