Patent ID: 8964614
Filing Date: 2015-02-24
Classification: H04L,H04W,Y02D

Abstract:
1. A method to manage idle mode operation of a communication device in a communication system comprising: receiving, by a node of the communication system from the communication device, a request to enter idle mode comprising a request to enable automatic renewal of an internet protocol (IP) address currently assigned to the communication device comprising a length of an IP address lease timer corresponding to the IP address currently allocated to the communication device and a length of an IP address update lease timer corresponding to the IP address; transmitting, to an IP address allocation unit which allocated the IP address to the communication device, the idle mode request; receiving, from the IP address allocation unit, an idle mode response comprising an IP lease update acknowledgement associated with the idle mode request; transmitting, to the communication device, the idle mode response; enabling, by the node of the communication system, automatic renewal of the IP address; configuring, by the node of the communication system, an idle mode timer corresponding to the IP address update lease timer, wherein the communication device enters idle mode after receiving the idle mode response and before the idle mode timer expires; and transmitting, by the node of the communication system to the IP address allocation unit, an IP lease update request corresponding to the IP address, when the idle mode timer expires and the communication device is in idle mode.