Patent ID: 8861475
Filing Date: 2014-10-14
Classification: H04W

Abstract:
1. A method implemented by a target gateway in a target Radio Access Network (RAN) of delivering data packets for a session to a mobile station during inter-RAT (Radio Access Technology) handover, the method comprising: receiving one or more forwarded packets for the session from a source gateway in a source RAN; receiving a first empty Generic Routing Encapsulation (GRE) packet from the source gateway, a header of said first empty GRE packet including a first sequence number indicating the end of the forwarded packets for the session; sending the forwarded packets to the mobile station; receiving one or more direct packets for the session from a network gateway, said direct packets sequentially ordered relative to the forwarded packets; and sending the direct packets to the mobile station after receiving the first empty GRE packet.