1. An apparatus comprising:at least one processor;
memory storing a program of instructions;
wherein the memory storing the program of instructions is configured to, with the at least one processor, cause the apparatus to at least:
at a master base station belonging to a wireless communication network comprising the master base station and a secondary cell group comprising at least one secondary base station, configure one or more secondary cell group bearers for a secondary base station, wherein configuring the secondary cell group bearer comprises configuring an inactivity timer for the secondary cell group, and wherein the inactivity timer is configured to indicate that, if no activity has occurred on the secondary cell group bearer during pendency of the inactivity timer, the secondary cell group bearer is to be released; and
signal the configuration to the secondary base station.