Patent ID: 9148825
Filing Date: 2015-09-29
Classification: H04W

Abstract:
1. A method comprising: performing a handover for a mobile device between a first radio access technology network and a second radio access technology network, wherein the first radio access technology network has a tracking area, and wherein the second radio access technology network has a routing area; activating idle mode signaling reduction in the mobile device, wherein activating the idle mode signaling reduction in the mobile device including activating (i) a first timer for the first radio access technology network, and (ii) a second timer for the second radio access technology network; in response to either one of the first timer and the second timer expiring, sending a tracking area update or a routing area update to a first base station, wherein the first base station is in the first radio access technology network or the second radio access technology network; and subsequent to the first timer or the second timer expiring, resetting the first timer while the second timer maintains a set offset from the first timer, wherein the tracking area update indicates that the mobile device has performed a handover to the first radio access technology network, and wherein the routing area update indicates that the mobile device has performed a handover to the second radio access technology network.