Communication system, communication terminal device, and base station device

Abstract

Provided is a high-speed communication system with high reliability and low latency, etc., under New Radio (NR). A communication system includes a communication terminal device, and a base station device configured to perform radio communication with the communication terminal device. The communication terminal device is configured to duplicate a packet and transmit the duplicated packets with carrier aggregation. The base station device is configured to transmit, to the communication terminal device, packet duplication control on packet duplication and secondary cell control on a secondary cell to be used for the carrier aggregation. The communication terminal device is configured to perform the packet duplication control and the secondary cell control based on priorities defined between the packet duplication control and the secondary cell control.

1 . A communication system, comprising:
 a communication terminal device; and   a base station device configured to perform radio communication with the communication terminal device,   wherein the communication terminal device is configured to duplicate a packet and transmit the duplicated packets with carrier aggregation or dual connectivity,   the base station device is configured to transmit, to the communication terminal device, a request for reconfiguring RRC connection, and   the communication terminal device is configured to receive the request for reconfiguring the RRC connection, switch a transmission method of the duplicated packets between the carrier aggregation and the dual connectivity, based on the request, and transmit the duplicated packets according to the transmission method.   
     
     
         2 . A communication terminal device configured to perform radio communication with a base station device,
 wherein the communication terminal device is configured to duplicate a packet and transmit the duplicated packets with carrier aggregation or dual connectivity, and   the communication terminal device is configured to receive, from the base station device, a request for reconfiguring RRC connection, switch a transmission method of the duplicated packets between the carrier aggregation and the dual connectivity, based on the request, and transmit the duplicated packets according to the transmission method.   
     
     
         3 . A base station device configured to perform radio communication with a communication terminal device,
 wherein the communication terminal device is configured to duplicate a packet and transmit the duplicated packets with carrier aggregation or dual connectivity,   the base station device is configured to transmit, to the communication terminal device, a request for reconfiguring RRC connection, and   the communication terminal device is configured to switch a transmission method of the duplicated packets between the carrier aggregation and the dual connectivity, based on the request, and transmit the duplicated packets according to the transmission method.