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Cell switching method and device

A cell switching and cell technology, applied in the field of communication, can solve problems such as long response time, switching failure, cell switching scheme cannot be directly applied to satellite scenarios, etc.

Active Publication Date: 2020-12-01
HUAWEI TECH CO LTD
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Problems solved by technology

[0004] However, since the propagation delay of NGEO satellites is usually a few milliseconds to tens of milliseconds, and the cell switching scheme of the prior art usually requires a long response time (greater than the propagation delay of NGEO satellites), if the prior art The cell handover scheme is applied to the satellite scene, and the response time will lead to handover failure, that is, the cell handover scheme in the prior art cannot be directly applied to the satellite scene

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Embodiment Construction

[0094] This application provides a cell switching method. The method of this application can be applied in the 5G system, and can also be applied in the long term evolution (long term evolution, LTE). The 5G system is also called a new wireless communication system and a new access technology (newradio, NR) or next generation mobile communication system.

[0095] figure 1 It is a schematic diagram of a typical network architecture of a satellite communication system, such as figure 1 As shown, the satellite communication system 200 includes a terminal device 201 , a satellite base station 202 , a ground station 203 and a core network 204 . The core network 204 mainly includes a user plane function (UPF) unit 205, a mobility management function (access and mobility management function, AMF) unit 206, a session management function (session management function, SMF) unit 207 and a data network (data network , DN) 208. The terminal device 201 communicates with the satellite bas...

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Abstract

The embodiment of the invention provides a cell switching method and device. A first network device of a first cell acquires user information of a terminal device, so the first network equipment can determine the switching information according to the user information and the operation information of the first network equipment, after the first network device sends an RRC message containing the switching information to the terminal device, the terminal equipment can carry out continuous N times of cell switching according to the switching information; in the N times of cell switching, the first network device can configure the switching conditions of subsequent N times of switching in advance at one time only by acquiring the user information once, so that the signaling flow and overhead of the network can be reduced, the response time of switching can be reduced, and the method and the device are suitable for network switching in a satellite scene.

Description

technical field [0001] The present application relates to communication technologies, and in particular to a cell handover method and device. Background technique [0002] Satellite communication has the advantages of wide coverage, flexible networking, convenient deployment and no geographical restrictions, which makes satellite communication more developed. In the satellite communication scenario, due to the high-speed movement of non-geostationary earth (NGEO) satellites, the user equipment (UE) in the connected state needs to switch between different satellite cells frequently to ensure business continuity. [0003] In the prior art, since the 5th generation mobile network (the 5th generation, 5G) is in the initial stage of development, there is only a cell handover solution between the UE and the ground next-generation base station in the 5G technology. Specifically, when the UE detects that the UE is in the current When the signal quality of the cell is poor, the UE ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/08
CPCH04W36/0016H04W36/08H04W36/0055H04W36/249H04W36/00838H04W36/14H04W36/362H04W84/06
Inventor 汪宇李榕孟贤乔云飞
Owner HUAWEI TECH CO LTD
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