多層衛(wèi)星網(wǎng)絡(luò)QoS路由協(xié)議研究
發(fā)布時間：2018-08-28 07:52
【摘要】：衛(wèi)星通信技術(shù)作為當今世上最先進的通信技術(shù)之一,其覆蓋面積大、通信距離遠等優(yōu)點使其在各個領(lǐng)域發(fā)揮著舉足輕重的地位。衛(wèi)星技術(shù)的不斷發(fā)展以及新興應(yīng)用的出現(xiàn)最終導(dǎo)致了多層衛(wèi)星網(wǎng)絡(luò)結(jié)構(gòu)逐漸取代單層衛(wèi)星網(wǎng)絡(luò)結(jié)構(gòu),并相繼帶來一些網(wǎng)絡(luò)中需要研究的新的問題。其中由于多層衛(wèi)星網(wǎng)絡(luò)結(jié)構(gòu)不規(guī)則,連接復(fù)雜,星間鏈路有間歇性通斷,網(wǎng)絡(luò)拓撲動態(tài)變化頻繁等特點,多層衛(wèi)星網(wǎng)絡(luò)路由協(xié)議的研究問題受到很多研究者的青睞。由于空間信息網(wǎng)絡(luò)要求有一定的Qo S保證,衛(wèi)星網(wǎng)絡(luò)作為其核心網(wǎng)絡(luò),必不可少要研究它的Qo S路由協(xié)議。因此本論文主要針對多層衛(wèi)星網(wǎng)絡(luò)的Qo S路由協(xié)議進行研究。本文首先分析了課題背景以及研究的意義,著重分析在衛(wèi)星移動通信中研究多層網(wǎng)絡(luò)Qo S路由協(xié)議的重要性及衛(wèi)星網(wǎng)絡(luò)路由協(xié)議的國內(nèi)外研究現(xiàn)狀,發(fā)現(xiàn)當下多層網(wǎng)絡(luò)的路由算法研究屬于衛(wèi)星通信的熱點問題,尤其是很多業(yè)務(wù)分類的Qo S路由算法的研究相對較少。針對這種現(xiàn)象,本文首先研究移動用戶位置管理策略確保移動用戶位置可知,為后文路由算法研究奠定基礎(chǔ)。其次針對當前GEO/LEO雙層衛(wèi)星網(wǎng)絡(luò)中連接關(guān)系頻繁變化造成鏈路頻繁切換;以往網(wǎng)絡(luò)的分層管理中,一顆GEO衛(wèi)星與所有與其可視的LEO衛(wèi)星之間都有鏈路,連接關(guān)系較為復(fù)雜;解決網(wǎng)絡(luò)擁塞的重路由方法的開銷較大等問題,本文提出一種基于族首管理的GEO/LEO雙層衛(wèi)星網(wǎng)絡(luò)Qo S路由策略。該策略提出一種MSAP算法,充分利用算法的可離線計算的屬性,使用該算法提前計算備選路徑,實現(xiàn)負載均衡,緩解網(wǎng)絡(luò)中的擁塞。然后針對MEO/LEO雙層網(wǎng)絡(luò)中拓撲更新頻繁且規(guī)律差;解決網(wǎng)絡(luò)擁塞、保證業(yè)務(wù)傳輸帶寬的重路由方法的開銷較大;不能充分利用多層網(wǎng)絡(luò)的優(yōu)勢互補來提高不同業(yè)務(wù)的Qo S滿意度等問題,本文提出一種基于蜂群位置優(yōu)化的MEO/LEO雙層衛(wèi)星網(wǎng)絡(luò)Qo S路由策略,該策略提出一種改進的BMDP算法,即M-BMDP算法,有效緩解網(wǎng)絡(luò)擁塞問題,且更好的為不同類型業(yè)務(wù)提供Qo S服務(wù),時延、丟包率特性都有很好的改善,且解決了重路由的延遲問題,降低了重路由開銷。最后考慮地面接入業(yè)務(wù)對網(wǎng)絡(luò)業(yè)務(wù)傳輸?shù)挠绊?在MEO/LEO雙層網(wǎng)絡(luò)中研究一種基于流量預(yù)測的MEO/LEO雙層衛(wèi)星網(wǎng)絡(luò)Qo S路由策略,通過神經(jīng)網(wǎng)絡(luò)預(yù)測地面接入業(yè)務(wù)流量模型,避免網(wǎng)絡(luò)中由于地面流量接入可能引起的擁塞問題,減少了星間傳輸業(yè)務(wù)的丟包率。
[Abstract]:As one of the most advanced communication technologies in the world, satellite communication technology plays an important role in various fields because of its large coverage area and long communication distance. With the development of satellite technology and the emergence of new applications, the multi-layer satellite network structure is gradually replacing the single-layer satellite network structure, and some new problems need to be studied in the network. Due to the irregular structure of multi-layer satellite network, complex connection, intermittent intersatellite links, frequent dynamic changes of network topology, and so on, the research of multi-layer satellite network routing protocol is favored by many researchers. As the space information network requires certain Qo S guarantee, satellite network as its core network, it is necessary to study its Qo S routing protocol. Therefore, this thesis mainly focuses on the Qo S routing protocol of multi-layer satellite networks. In this paper, the background and significance of the research are analyzed firstly, and the importance of studying Qo S routing protocol in satellite mobile communication and the current research status of satellite network routing protocol at home and abroad are analyzed. It is found that the current research on routing algorithms in multilayer networks is a hot issue in satellite communication, especially in many traffic classification Qo S routing algorithms. In view of this phenomenon, this paper first studies the mobile user location management strategy to ensure the mobile user location knowable, which lays the foundation for the future research of routing algorithm. Secondly, link switching is caused by the frequent change of connection relationship in the current GEO/LEO double-layer satellite network. In the previous hierarchical management of the network, there is a link between a GEO satellite and all its visible LEO satellites, so the connection relationship is more complex. To solve the problem that the rerouting method of network congestion is expensive, this paper proposes a Qo S routing strategy for GEO/LEO double-layer satellite networks based on clan head management. This strategy proposes a MSAP algorithm, which makes full use of the off-line computable properties of the algorithm, calculates alternative paths ahead of time, realizes load balancing and alleviates congestion in the network. Then aiming at the frequent and irregular topology update in MEO/LEO double-layer network, the rerouting method, which solves the network congestion and guarantees the traffic bandwidth, has a large overhead. It is not possible to make full use of the complementary advantages of multi-layer networks to improve the Qo S satisfaction of different services. In this paper, a Qo S routing strategy based on hive location optimization for MEO/LEO double-layer satellite networks is proposed, and an improved BMDP algorithm is proposed. That is, M-BMDP algorithm can effectively alleviate the network congestion problem, and better provide Qo S services for different types of services. The characteristics of delay and packet loss rate are all improved, and the delay problem of rerouting is solved and the rerouting overhead is reduced. Finally, considering the influence of terrestrial access service on network traffic transmission, a MEO/LEO double-layer satellite network Qo S routing strategy based on traffic prediction is studied in MEO/LEO bilevel network, and the traffic model of ground access service is predicted by neural network. In order to avoid the congestion problem caused by ground traffic access in the network, the packet loss rate of inter-satellite transmission services is reduced.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN927.2
[Abstract]:As one of the most advanced communication technologies in the world, satellite communication technology plays an important role in various fields because of its large coverage area and long communication distance. With the development of satellite technology and the emergence of new applications, the multi-layer satellite network structure is gradually replacing the single-layer satellite network structure, and some new problems need to be studied in the network. Due to the irregular structure of multi-layer satellite network, complex connection, intermittent intersatellite links, frequent dynamic changes of network topology, and so on, the research of multi-layer satellite network routing protocol is favored by many researchers. As the space information network requires certain Qo S guarantee, satellite network as its core network, it is necessary to study its Qo S routing protocol. Therefore, this thesis mainly focuses on the Qo S routing protocol of multi-layer satellite networks. In this paper, the background and significance of the research are analyzed firstly, and the importance of studying Qo S routing protocol in satellite mobile communication and the current research status of satellite network routing protocol at home and abroad are analyzed. It is found that the current research on routing algorithms in multilayer networks is a hot issue in satellite communication, especially in many traffic classification Qo S routing algorithms. In view of this phenomenon, this paper first studies the mobile user location management strategy to ensure the mobile user location knowable, which lays the foundation for the future research of routing algorithm. Secondly, link switching is caused by the frequent change of connection relationship in the current GEO/LEO double-layer satellite network. In the previous hierarchical management of the network, there is a link between a GEO satellite and all its visible LEO satellites, so the connection relationship is more complex. To solve the problem that the rerouting method of network congestion is expensive, this paper proposes a Qo S routing strategy for GEO/LEO double-layer satellite networks based on clan head management. This strategy proposes a MSAP algorithm, which makes full use of the off-line computable properties of the algorithm, calculates alternative paths ahead of time, realizes load balancing and alleviates congestion in the network. Then aiming at the frequent and irregular topology update in MEO/LEO double-layer network, the rerouting method, which solves the network congestion and guarantees the traffic bandwidth, has a large overhead. It is not possible to make full use of the complementary advantages of multi-layer networks to improve the Qo S satisfaction of different services. In this paper, a Qo S routing strategy based on hive location optimization for MEO/LEO double-layer satellite networks is proposed, and an improved BMDP algorithm is proposed. That is, M-BMDP algorithm can effectively alleviate the network congestion problem, and better provide Qo S services for different types of services. The characteristics of delay and packet loss rate are all improved, and the delay problem of rerouting is solved and the rerouting overhead is reduced. Finally, considering the influence of terrestrial access service on network traffic transmission, a MEO/LEO double-layer satellite network Qo S routing strategy based on traffic prediction is studied in MEO/LEO bilevel network, and the traffic model of ground access service is predicted by neural network. In order to avoid the congestion problem caused by ground traffic access in the network, the packet loss rate of inter-satellite transmission services is reduced.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN927.2
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1 毛騰躍;徐正全;朱容波;侯睿;;下一代衛(wèi)星網(wǎng)絡(luò)發(fā)展研究[J];電信科學(xué);2012年06期
2 杜宗n，
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