Patent ID: 8743787
Filing Date: 2014-06-03
Classification: H04L,H04W

Abstract:
1. A method, in a wireless transceiver of a radio access terminal, of reducing interference in a wireless communication system that supports uplink carrier aggregation, the method comprising: transmitting sounding reference signals (SRS) on an uplink primary component carrier to a base station; and receiving an activation command corresponding to an uplink secondary component carrier (SCC) from the base station; determining whether the wireless transceiver has valid timing information for the uplink SCC, wherein valid timing information for the uplink SCC indicates that the uplink SCC is uplink synchronized to the base station; and, in response to said determining, and wherein the wireless transceiver has been provided with configuration data by the base station indicating the SRS should be transmitted, enabling transmission of the SRS on the uplink SCC, if the uplink SCC is synchronized, and otherwise prohibiting transmission of the SRS on the uplink SCC until the uplink SCC is uplink synchronized.