Patent ID: 8625405
Filing Date: 2014-01-07
Classification: H04L,H04W

Abstract:
1. A method for use in a wireless device, the method comprising: a) receiving at least one radio resource control (RRC) message from a base station, said at least one RRC message causing in said wireless device: b) receiving a control command configured to cause transmission of a random access preamble on random access resources in said second carrier group; c) receiving a random access response comprising a long time alignment value for said second carrier group and a preamble identifier; and d) transmitting one or more of said sounding reference signals on said carrier after adjusting uplink transmission timing of said second carrier group based on said long time alignment value, said wireless device configured to not transmit any of said sounding reference signals on said carrier until said wireless device receives said random access response comprising said long time alignment value and an uplink grant.