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An Adaptive Channel Allocation Method for Oversubscribed Leo Satellite System

A channel allocation and satellite system technology, applied in the transmission system, radio transmission system, wireless communication, etc., can solve the problems that the number of virtual channels cannot be adjusted, and the quality of service of the system cannot be obtained, so as to avoid new calls being blocked and small new calls The blocking rate and the effect of improving the quality of service

Active Publication Date: 2020-04-24
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0030] In order to solve the problem that in the TCRA-O strategy, the number of virtual channels cannot be adaptively adjusted according to the user status in the system, resulting in the inability to obtain the best system service quality, an adaptive oversubscription LEO satellite system is proposed channel allocation method

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  • An Adaptive Channel Allocation Method for Oversubscribed Leo Satellite System
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  • An Adaptive Channel Allocation Method for Oversubscribed Leo Satellite System

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Embodiment Construction

[0074] The specific implementation method of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0075] In the existing communication, the location distribution of user terminals and the traffic ratio of high-priority users are not considered. The influence of these two factors on the selection of the optimal number of virtual channels, as the user status changes in the system, inappropriate The setting of the number of virtual channels will lead to a high handover failure rate or an insignificant decrease in the new call blocking rate, which cannot achieve the expected performance of the TCRA-O strategy. In the present invention, an improvement is made on the existing adaptive TCRA-O strategy, and an adaptive overbooking LEO satellite system channel allocation method is proposed, which is referred to as the ATCR-O strategy.

[0076] Compared with the TCRA-O strategy, the ATCR-O strategy is mainly improved in the processing ...

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Abstract

The invention discloses an adaptive channel allocation method for an oversubscribed LEO satellite system, which belongs to the field of mobile communication; specifically, firstly, a mobility model of the LEO satellite system is established, and conditions for channel allocation strategies are set; for beam cell C i , initially set the total number of virtual channel occupancy S = 0; then, the call request for a high-priority user accesses the beam cell C i , judging whether the call request is a new call request or a switching call request, respectively performing adaptive oversubscription channel allocation processing for different requests, and deciding whether to access the new call request or the switching call request; finally, the beam cell C i Process the terminated call, and transfer the reservation request on any virtual channel to the available channel it occupies; the advantage is that it can ensure that the call drop rate of high-priority users is close to zero, and the acquisition is small The blocking rate of new calls improves the overall service quality of the system.

Description

technical field [0001] The invention belongs to the field of mobile communication, in particular to an adaptive method for allocating channels of an overbooked LEO satellite system. Background technique [0002] Due to geographical and economic factors, the terrestrial mobile communication system cannot achieve global reachability. In contrast, the satellite mobile communication system is not affected by geographical location and distance, and can provide global seamless coverage communication at any time; and the LEO satellite system uses low transmission power. , low transmission delay and efficient bandwidth utilization, etc., can provide high-quality real-time mobile communication services. [0003] As a typical LEO satellite system, the Iridium system has 6 orbital planes, each with 11 satellites, such as figure 1 As shown, the radiation range of any satellite on the earth's surface is a circular area, called the satellite footprint; for efficient frequency division mu...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/185H04W16/10H04W24/02H04W72/04
CPCH04B7/18539H04W16/10H04W24/02H04W72/52
Inventor 冉静郭佳妮刘元安胡鹤飞袁东明高锦春
Owner BEIJING UNIV OF POSTS & TELECOMM
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