Self-adaptive over-booked LEO satellite system channel distribution method

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

Active Publication Date: 2017-06-13
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 s

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  • Self-adaptive over-booked LEO satellite system channel distribution method
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  • Self-adaptive over-booked LEO satellite system channel distribution method

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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 a self-adaptive over-booked LEO satellite system channel distribution method, and belongs to the field of mobile communication. The self-adaptive over-booked LEO satellite system channel distribution method specifically comprises the steps of firstly building a mobile model of an LEO satellite system and setting a condition for a channel distribution strategy; aiming at a beam cell Ci, initially setting the total occupation number of virtual channels S to be equal to zero; then aiming at a call request of a user with high priority, accessing the beam cell Ci and judging whether the call request is a new calling request or a switched call request, and aiming at different requests, performing self-adaptive over-booked channel distribution processing respectively and determining whether to access the new call request or the switched call request; and finally, processing the ended call by the beam cell Ci and transferring a preserved request at any virtual channel to the occupied available channel. The self-adaptive over-booked LEO satellite system channel distribution method has the advantages of obtaining a relatively low new call blocking rate and improving the service quality of the whole system under the condition of ensuring that the switching call drop rate of the user with high priority is close to zero.

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...

Claims

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Application Information

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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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