Patent ID: 7940779
Filing Date: 2011-05-10
Classification: H04L,H04M,H04W

Abstract:
1. A method for providing communication services to at least one mobile terminal in a communication network comprising a plurality of home agents, wherein said at least one mobile terminal uses at least one address to be served by a home agent identified within said plurality and said services are provided to said at least one mobile terminal within working sessions, comprising the steps of: providing, in said communication network, an authentication, authorization and accounting platform; selecting through said authentication, authorization and accounting platform, while said at least one mobile terminal is served by a first home agent in said plurality, a second home agent for serving said at least one mobile terminal; reallocating the supply of said services to said at least one mobile terminal from said first home agent to said second home agent, wherein the reallocating comprises sending from said authentication, authorization and accounting platform to said at least one mobile terminal through said first home agent configuration information for configuring said at least one mobile terminal for accessing said services through said second home agent; reallocating the supply of said communication services to said at least one mobile terminal from a first home agent to a second home agent of said plurality ensuring the survival of on-going application sessions; pointing out through a status function the fact that said address used by said at least one mobile terminal for communications with said first home agent is configured to be used to start new communications and/or only for ending the existing communications to ensure the survival of said current application sessions; assigning to said status function at least one value selected from the group of: a first value identifying that said address can be used to start new communications, a second value identifying that said address can be used only for existing communications, and a third value identifying that said address cannot be used either for new communications or for existing communications; when said status function has said first value, assigning to said at least one mobile terminal a new address for communicating with said second home agent, thereby switching said status function from said first value to said second value; and switching said status function from said second value to said third value when said at least one mobile terminal has ended all communications previously activated depending on the address used for communications with said first home agent.