Patent ID: 8149786
Filing Date: 2012-04-03
Classification: H04W

Abstract:
1. In a wireless system comprising a plurality of base stations, at least one network gateway, at least one traffic agent and a mobile subscriber terminal currently communicating with a first base stations out of said plurality of base stations communicating with a first network gateway and wherein said first network gateway conveys Internet Protocol (IP) traffic received from said mobile subscriber terminal to the at least one traffic agent and to convey IP traffic received along a packetized network towards said mobile subscriber terminal, a method to enable continuing a communication session that is currently carried by said mobile subscriber terminal through said first base station, through using a second base station out of said plurality of base stations, and comprising: during a communication session held with the mobile subscriber terminal, selecting an IP datagram out of a plurality of IP datagrams being part of said communication session and received at said first network gateway, to be a first IP datagram; prior to establishing a connection between said mobile subscriber terminal and said second base station, backing up a plurality of IP datagrams that were received at said first network gateway after that first IP datagram had been received thereat, and wherein said plurality of IP datagrams are addressed to the mobile subscriber terminal; and upon establishing a connection between said mobile subscriber terminal and said second base station, forwarding the IP datagrams that were backed up during the backup step to the mobile subscriber terminal, and forwarding all further IP datagrams addressed to said mobile subscriber terminal and received at the first network gateway after establishing the connection between the mobile subscriber terminal and the second base station, to the mobile subscriber terminal through said second base station.