Serving base station update in subsequent cell switch

Abstract

A first base station comprises one or more processors and memory storing instructions that, when executed by the one or more processors, cause the first base station to receive, from a second base station, a cell switch notification message, for a wireless device, comprising an identifier of a candidate cell. The instructions further cause the first base station to transmit, to a third base station, a second message to establish a connection, for the wireless device, between the first base station and the third base station. The second message comprises a first identifier identifying the wireless device within the first base station. The instructions further cause the first base station to receive, from the third base station, a third message, to establish the connection, comprising a fourth identifier identifying the wireless device within the third base station.