面向時(shí)間同步業(yè)務(wù)的空間信息網(wǎng)絡(luò)拓?fù)渚酆蠄D模型

蔚保國; 鮑亞川; 魏海濤

doi:10.11999/JEIT170252

面向時(shí)間同步業(yè)務(wù)的空間信息網(wǎng)絡(luò)拓?fù)渚酆蠄D模型

doi: 10.11999/JEIT170252

基金項(xiàng)目:

國家自然科學(xué)基金(91638203)，國家重點(diǎn)研發(fā)計(jì)劃(2016YFB0502102)

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- 被引次數(shù): 0
出版歷程
- 收稿日期: 2017-03-29
- 修回日期: 2017-08-31
- 刊出日期: 2017-12-19

Time Synchronization Service Oriented Topology Aggregation Model of Space Information Network

Funds:

The National Natural Science Foundation of China (91638203), The National Key Research and Development Program (2016YFB0502102)

摘要

摘要: 空間信息網(wǎng)絡(luò)的發(fā)展呈現(xiàn)出節(jié)點(diǎn)異構(gòu)和功能多樣化趨勢，網(wǎng)絡(luò)節(jié)點(diǎn)間的時(shí)間同步是實(shí)現(xiàn)協(xié)同任務(wù)的重要技術(shù)基礎(chǔ)。論文對空間信息網(wǎng)絡(luò)的時(shí)間同步業(yè)務(wù)特性進(jìn)行了分析，并提出基于多跳中繼的時(shí)間同步誤差模型。針對非實(shí)時(shí)時(shí)間同步業(yè)務(wù)特點(diǎn)，提出了鐘差相對不變性概念，并基于此提出了面向時(shí)間同步業(yè)務(wù)的空間信息網(wǎng)絡(luò)拓?fù)渚酆蠄D模型。不同于面向通信業(yè)務(wù)的網(wǎng)絡(luò)拓?fù)淠Ｐ?，該模型的建立以?jié)點(diǎn)時(shí)鐘性能和時(shí)間比對鏈路性能為約束條件，反映了時(shí)間同步業(yè)務(wù)的特性和需求。針對該模型進(jìn)行了空間信息網(wǎng)絡(luò)時(shí)間同步仿真實(shí)驗(yàn)，實(shí)驗(yàn)結(jié)果表明基于該模型進(jìn)行多跳中繼時(shí)間同步，可以減少時(shí)間同步過程的路由篩選及建鏈次數(shù)，降低時(shí)間同步業(yè)務(wù)的鏈路資源消耗，同時(shí)可以達(dá)到更高的時(shí)間同步精度。
- 空間信息網(wǎng)絡(luò) /
- 時(shí)間同步 /
- 鐘差相對不變性 /
- 拓?fù)渚酆蠄D
Abstract: The trend of heterogeneous node and functional diversification is presented in the development of space information network. The synchronization of network nodes is the technical foundation of task coordination of network nodes. The characteristic of time synchronization service of space information network is analyzed in this paper and the error model of multi-hop relay time synchronization is given. The concept of clock offset relative invariance is proposed based on the characteristic of non-real-time time synchronization, and a novel space information network topology aggregation model is given for time synchronization service. Differing from normal communication-service-oriented network models, the constraint condition of the model establishment is the performance of node clock and the time synchronization link, and the characteristic and requirement of time synchronization service is concerned. Simulation of space information network time synchronization is made according to the model. In the process of multi-hop relay time synchronization based on the model, less routing and linking number is needed. The link resource consumption is reduced, and the time synchronization precision is improved.
- Space information network /
- Time synchronization /
- Relative invariance of clock offset /
- Topology aggregation

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