Method for determining multi-user channel quality in mobile communication system, and user terminal and base station therefor

摘要

Provided are a method for determining multi-user channel quality in a mobile communication system, a user terminal and a base station of the present invention. The method includes: in each user terminal, calculating the MU CQIs based on a first feedback template notified from a base station that has control over the user terminal or a second feedback template set by the user terminal and feeding the MU CQIs back to the base station. In the first feedback template or the second feedback template, a feedback ratio of MU CQIs for a plurality of hypothetical interference numbers k are defined, k being an integer larger than 0 and smaller than a maximum number of users schedulable by the base station. According to the present invention, it is possible to improve the accuracy in multi-user MIMO scheduling.

主权项

1. A method for determining multi-user channel quality (MU CQIs) in a mobile communication system, the method comprising the steps of:
in each user terminal, calculating the MU CQIs based on a first feedback template notified from a base station that has control over the user terminal or a second feedback template set by the user terminal and feeding the MU CQIs back to the base station, wherein in the first feedback template or the second feedback template used in calculation of the MU CQIs, a plurality of hypothetical interference numbers k and a feedback ratio of MU CQIs for the plurality of hypothetical interference numbers k are defined, k being an integer larger than 0 and smaller than a maximum number of users schedulable by the base station, the user terminal calculates the MU CQIs based on the second feedback template set by the user terminal and feeds the MU CQIs back to the base station, and the base station uses MU CQIs fed back from one or more user terminals as a basis to perform multi-user multiple-input multiple-output scheduling, and selects the first feedback template for the user terminal.