Patent ID: 8942275
Filing Date: 2015-01-27
Classification: H04B,H04L

Abstract:
1. A method for use in a user equipment in a telecommunication system, the user equipment configured for multi-antenna transmissions, the method comprising: receiving, in a downlink channel, pre-coding vector information indicating a pre-coding vector for uplink transmission; determining whether the pre-coding vector indicated by the received pre-coding vector information is reliable or unreliable; applying the pre-coding vector indicated by the received pre-coding vector information for uplink transmission only if the pre-coding vector is determined to be reliable; applying a second pre-coding vector when the pre-coding vector indicated by the received pre-coding vector information is determined to be unreliable, wherein the second pre-determined pre-coding vector is the most recently received pre-coding vector that has been judged as being reliable.