Patent ID: 9203590
Filing Date: 2015-12-01
Classification: H04L,H04W

Abstract:
1. A method of adjusting an estimated signal to interference plus noise ratio (SINR) in an outer-loop link adaptation (LA) process, comprising: receiving a channel state information (CSI) report from a user equipment; estimating an SINR based on the CSI report and an outer-loop adjustment; selecting a modulation and coding scheme (MCS) for transmission of a data packet based on the estimated SINR and a target error rate, wherein the selected MCS may be normal, conservative or aggressive; monitoring an outcome of the transmission; if the transmission has failed and the selected MCS is normal or conservative, reducing the outer-loop adjustment by a downward step; if the transmission has failed and the selected MCS is aggressive, selectively reducing the outer-loop adjustment by the downward step in dependence on an accumulated aggressive adjustment; if the transmission is successful and the selected MCS is normal or aggressive, increasing the outer-loop adjustment by an upward step; and if the transmission is successful and the selected MCS is conservative, selectively increasing the outer-loop adjustment by the upward step in dependence on an accumulated conservative adjustment.