Patent ID: 9144044
Filing Date: 2015-09-22
Classification: H04W

Abstract:
1. A method providing signal synchronization at a wireless terminal communicating with a radio access network, the method comprising: receiving, from the radio access network, a command to add a first carrier on a first frequency as a link for transmissions from the radio access network to the wireless terminal, wherein the command comprises a parameter having a first status or a second status; responsive to and after receiving the command to add the first carrier, determining if the first carrier can be synchronized using synchronization signals of a second carrier on a second frequency different than the first frequency, wherein the command to add the first carrier is different than the synchronization signals of the second carrier, and wherein the synchronization signals include at least one of Primary Synchronization Channel signals, Secondary Synchronization Channel signals, and/or Cell Specific Reference signals; if it is determined based on the first status that the first carrier can be synchronized using synchronization signals of the second carrier, synchronizing the first carrier using synchronization signals of the second carrier on the second frequency different than the first frequency; if it is determined based on the second status that the first carrier cannot be synchronized using synchronization signals of the second carrier, synchronizing the first carrier using synchronization signals of the first carrier; wherein the first status is defined by one of an absence of the parameter in the command and a presence of the parameter in the command, and wherein the second status is defined by the other of the absence of the parameter in the command and the presence of the parameter in the command.