Method and apparatus for feedback transmission in wireless communication system

摘要

A method and an apparatus for feedback transmission in a wireless communication system are provided. A terminal receives information about a short-term feedback period and a long-term feedback period from a base station, and then transmits to the base station short-term feedback information per short-term feedback period or long-term feedback information per long-term feedback period over a primary fast feedback channel (PFBSCH). The long-term feedback information contains an index of a subband subjected to channel measurement and a difference in measurement values that is a difference between a reference channel measurement value and a channel measurement value being measured.

主权项

1. A method of transmitting a feedback in a wireless communication system, the method comprising:
receiving information on a short-term feedback period and a long-term feedback period from a base station; and transmitting short-term feedback information by the short-term feedback period or long-term feedback information by the long-term feedback period to the base station on a primary fast feedback channel (PFBCH), wherein the long-term feedback information comprises an index of a subband which is a subject of channel measurement and a difference measurement value which is a difference between a reference channel measurement value and a measured channel measurement value, wherein the long-term feedback information is the index of the subband and an index indicating feedback information of a PFBCH encoding type 1 corresponding to the difference measurement value, wherein the index indicating the feedback information of the PFBCH encoding type 1 is an integer which is one of 1 to 55, wherein the difference measurement value is a difference value between a previously transmitted channel quality indicator (CQI) and a measured CQI; and wherein transmitting the short-term feedback information or the long-term feedback information comprises generating a feedback sequence based on the short-term feedback information or the long-term feedback information; mapping the generated feedback sequence to a feedback symbol by modulating and repeating the generated feedback sequence; and mapping the feedback symbol to subcarriers allocated to the feedback channel.