A single-multicast mixed-service packet scheduling method for space-borne cicq-structured switches under geo-channel environment

Abstract

The invention discloses a GEO satellite-borne CICQ structure switch single-multicast mixed service packet scheduling algorithm, which belongs to the technical field of satellite network and high-performance packet switching. The purpose of the present invention is to alleviate the problem of multicast HOL Blocking in the grouping scheduling of CICQ switch in the input-output scheduling algorithm, and at the same time compensate the grouping that needs to be retransmitted due to the transmission failure caused by the GEO channel problem. In the input scheduling, on the premise of making the CICQ switch work as work-conserving as possible, the goal is to alleviate the blocking of the multicast queue head group to the secondary group. In single-multicast packet arbitration, the number of times the packet is retransmitted in the channel is considered as the primary factor. In the output scheduling, the goal is to alleviate the blockage of the sub-packet by the cross-buffer corresponding to the head of the multicast queue. The invention fully considers the characteristics and requirements of the GEO satellite network, and has good practical application value.

Description

technical field [0001] The invention belongs to the technical field of satellite network and high-performance packet switching. Background technique [0002] Satellite communication technology has gradually attracted attention and has been widely applied in practice. The position of satellite communication network in the entire communication network is becoming more and more important. In order to improve the performance of satellite network, on-board switching technology is one of the key contents of future research. Different from the terrestrial network, multicast occupies a relatively high proportion in the GEO satellite network business, and the on-board switching technology of single-multicast mixed service packet scheduling is the key technology of the satellite network. [0003] At present, the scheduling algorithm in the spaceborne CICQ switching structure mainly considers the analysis and modeling of the services arriving at the input port of the satellite switch,...

AI Technical Summary

Problems solved by technology

However, the proportion of multicast services in the GEO satellite network is relatively high, and the network environment is complex. In the CICQ switch scheduling, the bit error rate of the channel corresponding to the output port of the switch is high and changes dynamically. Therefore, it is necessary to provide a CICQ structure that considers the satellite network Single-Multicast Mixed Service Packet Scheduling Algorithm Based on Channel Characteristics

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