【摘要】：多層衛(wèi)星網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)具有明顯的時(shí)變特征,難以提供持續(xù)且穩(wěn)定的端到端路徑,導(dǎo)致高效路由問題面臨著巨大的挑戰(zhàn).將衛(wèi)星網(wǎng)絡(luò)設(shè)計(jì)為封閉的體系結(jié)構(gòu),采用強(qiáng)管理或調(diào)度式控制策略會(huì)導(dǎo)致其無法自由、高效地實(shí)現(xiàn)與其它系統(tǒng)的協(xié)同組網(wǎng).基于IP的網(wǎng)絡(luò)體系結(jié)構(gòu)在應(yīng)用于多層衛(wèi)星網(wǎng)絡(luò)時(shí)又存在路由效率不高的問題.基于命名數(shù)據(jù)網(wǎng)絡(luò)NDN(Named Data Networking)體系結(jié)構(gòu),提出一種多層衛(wèi)星網(wǎng)絡(luò)分布式路由方法——SNDN(Satellite Named Data Networking).根據(jù)鏈路切換的周期性和可預(yù)知性,以時(shí)變圖為建模工具,設(shè)計(jì)一個(gè)能自適應(yīng)稠密和稀疏場景的路由算法來動(dòng)態(tài)地計(jì)算時(shí)間相關(guān)的最快路徑并附加為源路由信息,充分利用命名數(shù)據(jù)網(wǎng)絡(luò)數(shù)據(jù)驅(qū)動(dòng)的通信模式、數(shù)據(jù)包級(jí)的安全特性和逐跳轉(zhuǎn)發(fā)的特點(diǎn),由節(jié)點(diǎn)在包轉(zhuǎn)發(fā)的過程中動(dòng)態(tài)地完成轉(zhuǎn)發(fā)表(FIB,Forwarding Information Base)和請(qǐng)求狀態(tài)表(PIT,Pending Interest Table)的構(gòu)建.可為面向未來空、天、地一體化協(xié)同組網(wǎng)的多層衛(wèi)星網(wǎng)絡(luò)路由研究提供一種新的思路.通過仿真實(shí)驗(yàn)及對(duì)比分析,驗(yàn)證了SNDN在路由效率和多播性能方面的優(yōu)勢.
[Abstract]:The topology of multilayer satellite networks has obvious time-varying characteristics, and it is difficult to provide continuous and stable end-to-end paths, which leads to great challenges for efficient routing problems. The satellite network is designed as a closed system structure, and the strong management or scheduling control strategy will lead to its freedom and efficient implementation of cooperative networking with other systems. IP-based network architecture has the problem of low routing efficiency when it is applied to multi-layer satellite networks. Based on the NDN (Named Data Networking) architecture of named data network, a distributed routing method for multi-layer satellite network is proposed: SNDN (Satellite Named Data Networking). According to the periodicity and predictability of link switching, using time-varying graph as a modeling tool, a routing algorithm is designed to dynamically calculate the time-dependent fastest path and attach it as source routing information. Taking full advantage of the data driven communication mode of named data network, the security characteristics of data packet level and the characteristics of jump forward, the node dynamically completes the construction of forwarding Information Base) and request pending Interest Table) in the process of packet forwarding. It can provide a new way for the research of multi-layer satellite network routing in the future. The advantages of SNDN in routing efficiency and multicast performance are verified by simulation and comparative analysis.
【作者單位】： 武漢大學(xué)計(jì)算機(jī)學(xué)院;地球空間信息技術(shù)協(xié)同創(chuàng)新中心;武漢大學(xué)測繪學(xué)院;
【基金】：國家自然科學(xué)基金(No.61373040,No.61572370)
【分類號(hào)】：TN927.2

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