US Patent No. 10,798,762

METHOD FOR ESTABLISHING TUNNEL BETWEEN LOCAL GATEWAYS, AND GATEWAY


Patent No. 10,798,762
Issue Date October 06, 2020
Title Method For Establishing Tunnel Between Local Gateways, And Gateway
Inventorship Yixu Xu, Shanghai (CN)
Han Zhou, Shanghai (CN)
Jin Zhang, Shanghai (CN)
Zhongping Chen, Shanghai (CN)
Assignee Huawei Technologies Co., Ltd., Shenzhen (CN)

Claim of US Patent No. 10,798,762

1. A method, comprising:determining, by a remote gateway (RGW), that a user equipment (UE) is handed over from a source-local gateway (S-LGW) to a target-local gateway (T-LGW), the S-LGW having forwarded first packets of a first local service between the UE and an application server providing the first local service to the UE via the S-LGW;
sending, by the RGW to the S-LGW, a first request message, the first request message:
comprising a user plane identifier of the T-LGW and an identifier of a tunnel;
requesting establishment of the tunnel between the S-LGW and the T-LGW; and
instructing the S-LGW to forward second packets of the first local service to the T-LGW using the tunnel; and
sending, by the RGW to the T-LGW, a second request message, the second request message:
comprising a user plane identifier of the S-LGW and the identifier of the tunnel;
requesting establishment of the tunnel between the S-LGW and the T-LGW; and
instructing the T-LGW to forward third packets of the first local service to the S-LGW using the tunnel.