Patent ID: 8977227
Filing Date: 2015-03-10
Classification: H04W

Abstract:
1. A method of handling signaling in a congested core network for a mobile device, the method comprising: initiating, by the mobile device, a request message to the network; receiving, by the mobile device, a back-off timer and an EMM (EPS Mobility Management) cause value in a reject message due to the congested core network; initiating, by the mobile device, a first service request procedure for an emergency bearer service when the back-off timer is running on the mobile device; and not deactivating, by the mobile device, non-emergency Evolved Packet System (EPS) context and keeping the non-emergency EPS context during the first service request procedure for the emergency bearer service, wherein the non-emergency EPS context corresponds to user plane radio bearers which was not established, locally or with signaling.