Handover switching method of user terminal under single-hop mode in satellite communication system

A satellite communication system and handover technology, which is applied in the field of user terminal handover, can solve problems that are rarely involved and have not been discovered, and achieve the effect of small changes and few changes

Inactive Publication Date: 2010-10-27
PEKING UNIV
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Problems solved by technology

It can be seen from the patents listed above that at present, most of the considerations for satellite system switching are how to judge whether to switch, and how to control the switching time, but little is involved in the specific switching operation and process, especially for those with single-hop communication. There is currently no relevant research on how the capable satellite system completes the operation of the on-board switching system involved in the handover

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  • Handover switching method of user terminal under single-hop mode in satellite communication system
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  • Handover switching method of user terminal under single-hop mode in satellite communication system

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[0027] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0028] The following embodiments use the existing terrestrial communication network, add on-board processing management control branch and corresponding interface on the basis of the existing communication protocol, and control the handover in the case of single-hop communication. The following embodiments are based on the 3G compatible system (specifically based on the 3GPP / UMTS Release 4 reference model [3rd GPP Technical Specification Group Services and Systems Aspects: Network architecture, Release 4, 3GPP TS23.002V4.8.0, 2003-06]) Implementation is described as an example.

[0029] In the satellite communication system o...

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Abstract

The invention discloses a handover switching method of a user terminal under a single-hop mode in a satellite communication system, belonging to the technical field of satellite communication. The method of the invention comprises the following steps: (a) a wireless network controller of a user terminal sends a single-hop resource reconfiguration message to a satellite routing controller and simultaneously starts a double-hop switching process required by signaling; (b) the satellite routing controller judges whether single-hop resources are available or not, wherein if the single-hop resources are available, the wireless network controller indicates the satellite routing controller to execute single-hop resource reallocation and indicates the user terminal to carry out physical channel reconfiguration, and if no single-hop resources are allocated, the wireless network controller indicates the satellite routing controller to release current single-hop resources and indicates the terminal to carry out physical channel reconfiguration according to a double-hop link physical channel message; (c) the satellite routing controller informs the satellite to execute operation; and (d) the wireless network controller completes the ground network operation required by handover switching of the user terminal. The invention can be used for satellite mobile communication.

Description

technical field [0001] The invention belongs to the technical field of satellite communication, and relates to a user terminal handover method in a single-hop mode in a synchronous orbit satellite communication system. Background technique [0002] Many existing communication systems provide both terrestrial cellular and satellite communications. The typical application of satellite communication between terminals is the double-hop mode, that is, two signaling paths: one is from the initial terminal to the ground station through the satellite, and the other is from the ground station to the destination terminal through the satellite. The double-hop mode in the GEO satellite communication system will cause an end-to-end delay of 540ms, which is relatively long for voice communication. In addition to the double-hop satellite communication system, there are also satellite communication systems that support single-hop communication. This mode can reduce delay and halve voice de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/10H04W84/06
Inventor 吴建军王坤高振兴杜建成郭建程宇新
Owner PEKING UNIV
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