Patent ID: 9713148
Date: 2017-07-18
CPC Classifications: H04L,H04W

Claim:
1. A communication system comprising: a base station device and a communication terminal device configured to communicate with each other in a first cell configured on a first carrier and a second cell configured on a second carrier different from said first carrier, said second carrier is associated with said first carrier, said first carrier and said second carrier belong to a same frequency band, said second carrier is synchronized with the first carrier in time and frequency to such an extent that the communication terminal device does not need separate synchronization processes for communication on both of the first and second carriers, an associated carrier, being said first carrier, is associated with said second carrier, and said base station, using said associated carrier, notifies said communication terminal device of carrier information being information regarding said second carrier, the carrier information being information required for the communication terminal device to transmit and receive on the second carrier, and upon said notification of said carrier information from said base station using said associated carrier, said communication terminal device recognizes that said second carrier is activated or deactivated.