Method for distributing and routing optimal services of multi-layer satellite network based on minimum time delay

A satellite network and minimization technology, applied in the field of satellite communications, can solve the problems of underutilization of multi-layer satellite network resources, satellite congestion, reduced network throughput and average end-to-end delay performance, etc., to solve path expansion and Path shrinkage problem, network throughput improvement, and the effect of avoiding network congestion problems

Active Publication Date: 2015-06-03
XIDIAN UNIV
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Problems solved by technology

[0005] However, the three routing methods proposed above do not make full use of the resources of the multi-layer satellite network, so that when the network services are unevenly distributed, some satellites will still be congested, thereby reducing the network throughput and average end-to-end delay performance.

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  • Method for distributing and routing optimal services of multi-layer satellite network based on minimum time delay
  • Method for distributing and routing optimal services of multi-layer satellite network based on minimum time delay
  • Method for distributing and routing optimal services of multi-layer satellite network based on minimum time delay

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Embodiment Construction

[0041] refer to figure 1 , the specific implementation steps of the present invention are as follows:

[0042] Step 1, determine the logical area number according to the initial satellite network topology, the node finds its neighbor nodes according to the geographical location information, and establishes and maintains its own neighbor node table.

[0043] refer to figure 2 , the specific steps of LEO satellite topology modeling are as follows:

[0044] (1a) Given a satellite network scenario: there are N in the network L =P L ×S L LEO satellites, where P L is the orbital number, S L is the number of satellites in each orbit; there are N M =P M ×S M mid-orbit satellites, P M and S M Respectively, the number of orbits in the mid-orbit satellite layer and the number of satellites in each orbit;

[0045] (1b) Define the logical area of ​​the earth according to the initial topology of the network, and the satellite virtual node numbers serving the logical area are al...

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Abstract

The invention discloses a method for distributing and routing optimal services of multi-layer satellite network based on minimum time delay, and aims to solve the problems of large end-to-end time delay, low handling capacity and insufficient utilization of network resource of a multi-layer satellite communication network routing method. The method comprises the following steps: determining a logic area, a virtual node number and a low-earth-orbit satellite routing list according to the initial network topology; periodically updating the node number and the routing list by a low earth orbit; updating a virtual satellite set and a member routing list according to the snapshot time sequence set by a medium earth orbit, and synchronously updating the number of an administrator by the low earth orbit; if the services arrive and the arrival rate of the current satellite area is less than the arrival rate threshold of the ground service supported by the area based on the minimum end-to-end time, transmitting the service in the low earth orbit, and otherwise, transferring the service to a high-level satellite to route, and finally sending a target node. With the adoption of the method, the performance of the multi-layer satellite communication network is improved; the method can be applied to the routing of the multi-layer satellite communication network.

Description

technical field [0001] The invention relates to the technical field of satellite communication, in particular to an optimal service distribution routing method based on minimum time delay, which can be used in a multi-layer satellite communication network. Background technique [0002] Compared with the single-layer satellite communication network, the multi-layer satellite communication network has attracted widespread attention in recent years because of its wide coverage, multicast capability, and high network capacity. Lack of communication infrastructure system. In addition, through the cooperation between multi-layer satellites, the robustness of the communication system is increased, so that the network can still guarantee the communication quality of network services in the case of certain links or satellite failures. [0003] However, due to the different movement speeds of multi-layer satellites, the satellite network topology changes frequently, link on-off switc...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/185H04L12/701
Inventor 盛敏周笛王玺钧张琰李建东史琰刘润滋汪宇
Owner XIDIAN UNIV
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