Patent ID: 9232544
Filing Date: 2016-01-05
CPC Classification: H04W

Claim Text:
1. A method implemented by a serving gateway node (SGW), the SGW operative to support a control-plane tunnel to a mobility management entity (MME), a control plane tunnel to a packet data network gateway node (PGW), and one or more user plane tunnels to the PGW, wherein the SGW is operative to cause a user equipment (UE) to enter an ECM-IDLE state or an ECM-CONNECTED state, the method comprising: starting a timer upon receiving a Create Session Request message from the MME or upon transmitting a Session Request Response message to the MME; causing the UE to enter the ECM-IDLE state if the timer expires prior to the SGW receiving a Modify Bearer Request message; and if a Modify Bearer Request message is received after the timer has been started and before the timer expires: