Patent ID: 8671206
Filing Date: 2014-03-11
Classification: H04L,H04W

Abstract:
1. A communication system comprising: a central session management server having at least one non-transitory memory and at least one processor; a first communication device having at least one non-transitory memory and at least one processor; and a first survivability server having at least one non-transitory memory and at least one processor; the first communication device sending an initial message to the central session management server to be authenticated by the central session management server, the initial message comprising account information for a user associated with the first communication device and current location information of the first communication device; the central session management server authenticating the first communication device by evaluating the account information and assigning the first survivability server to the first communication device based on the current location information provided in the initial message; the central session management server sending a response message to the first communication device in response to the initial message, the response message comprising information to effect an assignment of the first survivability server to the first communication device; and the first communication device sending at least one registration message to at least one of the central session management server and the first survivability server to register with at least one of the central session management server and the first survivability server such that communications utilizing a service hosted by the central session management server is usable by the first communication device via the first survivability server if the central session management server is unable to provide the service; and a second survivability server, the first survivability server being responsible for providing survivability service in a first area and the second survivability server being responsible for providing survivability service in a second area, the first area being comprised of a location identified by the current location information of the initial message and wherein the first communication device is a mobile communication device; and the first communication device being reassigned to the second survivability server by the central session management server after the first communication device is moved such that the first communication device is positioned in a location within the second area.