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Routing method for leo/geo double layer satellite network

A double-layer satellite network and routing technology, which is applied in the field of satellite communication, can solve the problems of small processing capacity coverage, large propagation delay, and small data transmission delay, so as to achieve easy access to the network, small transmission delay, and guaranteed The effect of throughput

Active Publication Date: 2019-04-02
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

[0003] In the satellite network architecture composed of low-orbit satellites and high-orbit satellites, low-orbit satellites have the characteristics of limited processing capacity, small coverage, and small ground data transmission delay; The advantage of large coverage, but also the disadvantage of large propagation delay

Method used

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  • Routing method for leo/geo double layer satellite network
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  • Routing method for leo/geo double layer satellite network

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Embodiment Construction

[0033] The present invention ensures the priority sending of high-level user data packets on the premise of the same service; and ensures the priority sending of high-level service data packets on the premise of the same level of users. The influence factor of hotspots in the geographical time domain is designed to guide the transfer of traffic to non-hotspot areas, realize the load balancing of traffic, reduce the pressure on satellites in hotspot areas, and improve the throughput of the network.

[0034] 1. Business classification and user level

[0035] The business is divided into three types: A, B, and C. Among them, A is a delay-sensitive service, such as a voice service; a B-bandwidth-sensitive service is a service that has a certain time tolerance but requires high throughput, such as a video image service ; Class C is the service of best effort transmission, such as mail service. Delay-sensitive services have higher requirements on packet end-to-end delay and delay j...

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Abstract

Routing strategy for LEO / GEO two-tier satellite network. The present invention improves the existing satellite network, and proposes a satellite network routing strategy aimed at the LEO / GEO double-layer satellite network, which has flow balance capability and can satisfy multi-service and multi-level users. Under the same business premise, high Priority sending of high-level user data packets; under the premise of users of the same level, priority transmission of high-level service data packets is guaranteed. The influence factor of hotspots in the geographical time domain is designed to guide the transfer of traffic to non-hotspot areas, realize the load balancing of traffic, reduce the pressure on satellites in hotspot areas, and improve the throughput of the network.

Description

technical field [0001] The invention relates to a routing method for LEO / GEO double-layer satellite network, which belongs to the technical field of satellite communication. Background technique [0002] With the recent development of satellite return channel and on-board processing technology, satellites are now able to provide two-way communication services with ground stations, and can provide coverage of a wide geographic area and interconnection of remote ground networks. However, limited spatial information resources and unstable satellite link connections make satellites underperform in the business of supporting high-quality QoS services. On the other hand, the satellite network has the characteristics of high dynamic topology and uneven distribution of ground users, and the network load is easy to be unbalanced. Some satellites will be congested and surrounding satellites will not be fully utilized, which increases the queuing delay and loss probability of data pack...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/721H04L12/803H04L12/851H04L12/927H04L47/80
CPCH04L45/123H04L47/125H04L47/24H04L47/805
Inventor 孙力娟季斌王汝传周剑韩崇肖甫郭剑
Owner NANJING UNIV OF POSTS & TELECOMM
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