Patent ID: 10064108

Abstract:
In a handover procedure between cells under different radio base stations (eNB), “RRC diversity” is implemented while considering conditions in a PDCP layer and an RLC layer. A handover method of the invention includes the steps of: causing a radio base station (eNB #1) to transmit to a radio base station (eNB #10), information necessary for generating PDCP-PDU and RLC-PDU; causing the radio base station (eNB #10) to transmit to the radio base station (eNB), “HO ack” including “HO command”; and causing each of the radio base station (eNB #1) and the radio base station (eNB #10) to generate the RLC-PDU including the PDCP-PDU containing the “HO command” based on the information and to transmit the RLC-PDU to a mobile station (UE).