Patent ID: 8699317
Filing Date: 2014-04-15
Classification: H04L,H04W

Abstract:
1. A method for use in a wireless device, the method comprising: a) receiving from a base station at least one radio resource control message comprising configuration parameters of: b) transmitting first uplink signals in said second carrier group employing a first additional carrier as a timing reference carrier, said first additional carrier being an activated carrier in said second carrier group; c) changing autonomously said timing reference carrier to a second additional carrier in said second carrier group in response to deactivation or release of said first additional carrier and when at least one additional carrier in said second carrier group is active; d) transmitting second uplink signals in said second carrier group employing said second additional carrier as said timing reference carrier; e) receiving a time alignment command comprising a time adjustment value and an index identifying one of said first carrier group or said second carrier group; and f) applying said time adjustment value to third uplink signals transmitted on every activated uplink carriers in the carrier group identified by said index.