Method, Device and System for Implementing Optimized Inter-RAT Handover
AssigneeHuawei Technologies Co., Ltd.
InventorsYanglai Shuai, Hai Liu, Wenruo Zhu, Longgui Huang
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Abstract
A method, device and system for implementing optimized inter-RAT handover are disclosed. In the method, a user equipment or a source network decides to prepare for a handover to a target network. A corresponding target network ID is obtained from a configured mapping between cell IDs and target IDs according to a received cell ID. Target network bearers are set up after determining an access node of the target network. The user equipment is connected to the target network after handover preparation is complete.
Claims12
A method for implementing handover, the method comprising:
- receiving a connecting request at a mobility management entity (MME) of a target network, the connecting request transmitted from a source network and being related to a user equipment (UE);
- generating, by the MME of the target network, an indication in response to the connecting request, wherein the indication is used to indicate a serving gateway (SGW) of the target network that when a user plane bearer in the target network with respect to the UE is not established the SGW of the target network buffers received downlink data without triggering a paging process with respect to the UE;
- and
- transmitting, by the MME of the target network, the indication to the SGW of the target network.
An apparatus for implementing handover, the apparatus comprising:
- a receiver, configured to receive a connecting request transmitted from a source network, wherein the connecting request is related to a user equipment (UE);
- a processor, configured to generate an indication in response to the connecting request, wherein the indication is used to indicate a serving gateway (SGW) of a target network that when a user plane bearer in the target network with respect to the UE is not established the SGW of the target network buffers received downlink data without triggering a paging process with respect to the UE;
- and
- a transmitter, configured to transmit the indication to the SGW of the target network.
A communication system for implementing handover, comprising a mobility management entity (MME) of a target network, wherein the MME is coupled to a serving gateway (SGW) of the target network in a communicating way and wherein the MME of the target network is configured to:
- receive a connecting request transmitted from a source network, wherein the connecting request relates to a user equipment (UE) to the source network;
- generate an indication in response to the connecting request, wherein the indication is used to indicate the SGW of the target network that when a user plane bearer in the target network with respect to the UE is not established the SGW of the target network buffers received downlink data without triggering a paging process with respect to the UE;
- and
- transmit the indication to the SGW of the target network.
Dependencies are inferred from the claim text.