COMMUNICATION SYSTEM, COMMUNICATION METHOD, RADIO TERMINAL, RADIO RELAY DEVICE, AND CONTROL DEVICE

摘要

A technique is disclosed, according to which it is possible to efficiently use network resources, to reduce the burden on a control device, and to control the communication between radio terminals by the control device when a transmitting side radio terminal and a receiving side radio terminal are connected to the same radio relay device. According to this technique, when a transmitting side UE1 and a receiving side UE2 are connected to the same E-Node B 103, the transmitting side UE1 divides a transmission packet addressed to UE2 into a first packet to be transmitted via a route not passing through ACGW 105 and a second packet to be transmitted via a route passing through ACGW 105, and the packets are transmitted to E-Node B 103. E-Node B 103 transmits the first packet to UE2 and also transmits the second packet to ACGW 105. ACGW 105 receives the second packet and transmits it to E-Node B 103. E-Node B 103 receives the second packet transmitted from ACGW 105 and transmits it to UE2. UE2 receives the first packet and the second packet and synthesizes them to restore the initial packet.