Channel allocation method for low-orbit satellite communication system

Abstract

The invention relates to a channel allocation method for a low-orbit satellite communication system. By combining a self-adaptive channel reservation strategy with an enhanced queuing strategy, channel allocation schemes are dynamically adjusted according to different channel occupancy rates. The method comprises the following steps: carrying out pre-allocation to enable the number of fixed channels of satellite beam cells to be same, and dividing the channels in each satellite beam cell into common channels and preservation channels; sending a resource request to a satellite control center by virtue of a terminal; judging whether the common channels are idle by virtue of the low-orbit satellite communication system after resource request arrives; and if yes, determining different channel allocation schemes according to the occupancy rate of the common channels, and carrying out channel allocation. By combining the self-adaptive channel reservation strategy with the enhanced queuing strategy, the channel resources are adequately utilized, and requirements of different users are furthest met, so that the integral service quality of the system is in a relatively high level under the condition that a small part of low priority businesses are inevitably sacrificed.

Description

technical field [0001] The invention relates to a satellite communication technology, in particular to a channel allocation method of a low-orbit satellite communication system. Background technique [0002] Satellite communication is widely used in fields where the ground communication system is difficult to cover or the construction cost is too high due to its advantages such as wide coverage, unaffected by geographical conditions, high reliability, and strong invulnerability. Compared with the medium and high orbit satellite communication system, the Low Earth Orbit (LEO) communication system has small link delay, low path loss, and is convenient for miniaturization of terminal equipment. At the same time, the development of spot beam and frequency multiplexing technology also provides It provides technical support and is considered to be the most promising satellite communication system. However, low-orbit satellites move fast and users switch frequently. An unreasonabl...

AI Technical Summary

Problems solved by technology

For the channel reservation strategy, the fixed channel reservation strategy is likely to cause a high new call blocking rate; although the dynamic channel reservation scheme can protect the switching call while avoiding an excessively high new call blocking rate, most of the existing research The scheme is relatively simple, and the overall service quality of the system needs to be improved

Images