Patent ID: 9699744
Date: 2017-07-04
CPC Classifications: H04J,H04L,H04W

Claim:
1. A radio terminal comprising: at least one processor configured to aggregate a first cell group with a second cell group, wherein the first cell group includes a first cell on which a first Physical Uplink Control Channel (PUCCH) is transmitted and the second cell group includes a second cell on which a second PUCCH is transmitted; a first timer associated with the first cell group, wherein the first timer is used to control whether uplink transmission of the radio terminal in at least one of serving cells of the first cell group is synchronized; and a second timer associated with the second cell group, wherein the second timer is used to control whether uplink transmission of the radio terminal in at least one of serving cells of the second cell group is synchronized, wherein expiry of the first timer associated with the first cell group does not affect the operation of the second cell group.