Method and apparatus for providing service in a multi-ran comminucation system

摘要

To address the need for more resource efficient methods of providing service in multi-RAN communication systems (600), various embodiments are described for informing a cross-paging RAN that a targeted remote unit (601) is not accepting a service request, for informing a serving RAN that the targeted remote unit is accepting the service request, and for informing an IMS (IP Multimedia Subsystem) network (611) that the targeted remote unit is moving from the serving RAN to the cross-paging RAN (or simply moving to another RAN without being cross-paged). Thus, embodiments such as those described herein can enable multi-RAN communication systems to more quickly release unneeded resources, to reduce the amount of unnecessary paging, and to minimize cross-paging when an IMS core network is available to deliver voice over IP (VoIP) calls.