Patent ID: 9143537
Filing Date: 2015-09-22
Classification: H04L,H04W

Abstract:
1. A communication device configured to communicate with an IMS network, the communication device comprising: a communication interface configured to exchange data with the IMS network; and a communication processor configured to transfer a Session Initiation Protocol (SIP) register request to the IMS network to register the communication device with the IMS network, wherein registration of the communication device is valid for a registration duration; the communication processor is configured to generate a SIP request for initiating a session in the IMS network, and to determine whether extension of the registration duration is requested within the communication device based on criteria, wherein the criteria include a percentage of registration time remaining, an amount of registration time remaining, and a history of call activities; the communication processor is configured to format a header of the SIP request with registration information that requests the extension of the registration duration for the communication device, and to transmit the SIP request to the IMS network.