Patent ID: 8885583
Filing Date: 2014-11-11
Classification: H04W

Abstract:
1. A radio communication system comprising: a mobile station device configured to transmit, to a base station device, a random access preamble, wherein the mobile station device is further configured to receive, from the base station device, a random access response to the random access preamble, the received random access response including timing deviation information, and wherein the mobile station device is further configured to ignore the timing deviation information, in case that, in an uplink synchronous status, the timing deviation information included in the random access response corresponds to the random access preamble whose preamble identification (ID) is randomly selected by the mobile station device, wherein the timing deviation information does not include a Null value or an indication to ignore the timing deviation information; and to perform uplink timing alignment based on the timing deviation information, in case that, in an uplink asynchronous status, the timing deviation information included in the random access response corresponds to the random access preamble whose preamble identification (ID) is randomly selected by the mobile station device.