A Method for Reducing Handover Delay in Satellite Communication System

A satellite communication system and time delay technology, applied in the field of satellite communication, can solve problems such as large beam coverage, limited on-board resources, extended signal transmission time, etc., to achieve the effect of reducing time delay and reducing ping-pong effect

CN105357725BActive Publication Date: 2018-08-14CHONGQING UNIV OF POSTS & TELECOMM
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2018-08-14

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Abstract

The invention relates to a method for reducing satellite communication system switching delay, in particular to a switching method for spot beams in the same gateway station of a geostationary orbit satellite. In the method, a switching position area is acquired by using the position information of a mobile terminal of a satellite communication system and combining historical measurement information; the possibly-spanned switching position area is pre-judged according to a navigation path; a velocity vector of the current mobile terminal is acquired by combining a digital map, if the time when the mobile terminal travels to the switching position area from the current position is less than a certain threshold value, pre-switching is completed and finally, switching confirmation is carried out through measurement. Through the adoption of the method, the satellite beam switching delay can be reduced greatly, and in addition, the switching ping-pong effect can be reduced.
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Description

technical field

[0001] The invention belongs to the technical field of satellite communication, and relates to a method for reducing the switching time delay of a satellite communication system, in particular to a method for switching midpoint beams of the same gateway station of a geosynchronous orbit satellite. Background technique

[0002] With the rapid development of highways and high-speed railways, and the popularity of aircraft, the current mobile terminals have the characteristics of wide distribution, fast moving speed, and strong regularity of moving paths. However, it is difficult for the current wireless mobile communication system to meet the relevant performance requirements. Therefore, Using the mobile satellite communication system to provide communication services for high-speed mobile terminals has the advantages of large beam coverage, fast construction speed, saving ground resources, and easy broadcasting and multiple access communications. Mobile satell...

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Embodiment Construction

[0032] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0033] figure 1 It is a switching flow chart in the present invention, as shown in the figure, the method of the present invention includes the following steps: Step 1: Obtain the switching location area; Step 2: Plan the navigation path; Step 3: Determine the mobile terminal speed vector; Step 4: Switch judgment.

[0034] like image 3 Shown is a schematic diagram of the composition of the GMR-1 system. The system consists of geosynchronous orbit satellites, satellite control centers, a series of gateway stations and a large number of user terminals. A gateway station includes one or more gateway transceiver subsystems, one or more gateway station controllers, and multiple mobile switching centers. A gateway station controls one or several beams. When the user moves to the edge of the beam, if the current beam cannot meet the communica...