本文關(guān)鍵詞： 混合無線Mesh網(wǎng)絡(luò) 路由協(xié)議 能量感知 移動性感知 限制機制 能量均衡　出處：《吉林大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

【摘要】：混合無線Mesh網(wǎng)絡(luò)(Wireless Mesh Networks,WMN)因其具有更強的網(wǎng)絡(luò)連接性、更高的網(wǎng)絡(luò)可靠性和更大的覆蓋范圍,被認(rèn)為是無線寬帶接入Internet的一個理想解決方案。路由協(xié)議為網(wǎng)絡(luò)中節(jié)點通信提供有效選路依據(jù),其好壞直接影響著網(wǎng)絡(luò)吞吐量、丟包率等性能。因此,混合WMN路由研究對于提高網(wǎng)絡(luò)整體性能至關(guān)重要。現(xiàn)有的無線Mesh網(wǎng)絡(luò)路由研究主要集中在基礎(chǔ)設(shè)施Mesh網(wǎng)絡(luò)或客戶端Mesh網(wǎng)絡(luò)中,混合WMN路由研究報道相對較少。在混合WMN中,客戶端具有移動性和能量受限特性,會影響路徑的穩(wěn)定性和網(wǎng)絡(luò)的生存時間;客戶端的多跳通信導(dǎo)致通信鏈路多樣化,現(xiàn)有的基礎(chǔ)設(shè)施Mesh路由協(xié)議不再適用于混合WMN。因此設(shè)計一種綜合考慮網(wǎng)絡(luò)狀態(tài)及混合WMN節(jié)點特性的路由協(xié)議對未來寬帶無線通信的發(fā)展具有重要理論意義和應(yīng)用價值。本文針對現(xiàn)有的混合WMN路由協(xié)議未能綜合考慮網(wǎng)絡(luò)干擾、負(fù)載及Mesh客戶端的移動性和能量受限特性問題,提出了一種能量與移動性感知(Energy and Mobility Aware,EMA)路由協(xié)議。EMA路由協(xié)議在AODV協(xié)議基礎(chǔ)上,采用新提出的能量與移動性感知路由度量MEMA(Metric of Energy and Mobility Aware)作為選路標(biāo)準(zhǔn)。MEMA度量將通過跨層設(shè)計方法獲取的MAC層信道利用率、路由層路徑長度、應(yīng)用層的節(jié)點移動速度和剩余能量作為度量參數(shù),綜合考慮了網(wǎng)絡(luò)干擾、負(fù)載,并感知Mesh客戶端移動性和能量受限特性對網(wǎng)絡(luò)狀態(tài)的影響,從而選擇一條吞吐量高而穩(wěn)定的最優(yōu)路徑。同時針對客戶端轉(zhuǎn)發(fā)特性帶來的大量洪泛開銷設(shè)計一種限制轉(zhuǎn)發(fā)機制優(yōu)化EMA路由協(xié)議,有效的降低了開銷并節(jié)約能量。NS2仿真結(jié)果表明,EMA路由協(xié)議在吞吐量、丟包率、平均時延、網(wǎng)絡(luò)開銷和客戶端能量消耗等網(wǎng)絡(luò)性能方面均有明顯的改善。在上述研究基礎(chǔ)上,本文提出了一種區(qū)域能量與移動性感知(Regional Energy and Mobility Aware,REMA)路由協(xié)議,解決了現(xiàn)有混合WMN路由協(xié)議未考慮Mesh客戶端能量受限特性對網(wǎng)絡(luò)生存時間的影響問題,使所選路徑更穩(wěn)定。REMA協(xié)議主要從兩方面對MEMA度量進(jìn)行了改進(jìn):(1)采用平均集中度感知通信節(jié)點傳輸范圍內(nèi)的能量消耗強度及其離散程度,為網(wǎng)絡(luò)業(yè)務(wù)選擇剩余能量充足的區(qū)域,實現(xiàn)能量均衡并延長網(wǎng)絡(luò)生存時間;(2)采用平均離散度重新衡量移動速度對網(wǎng)絡(luò)的影響,增強路徑的穩(wěn)定性,降低了網(wǎng)絡(luò)開銷。REMA不僅更準(zhǔn)確的感知了客戶端能量受限和移動性對網(wǎng)絡(luò)狀態(tài)的影響,同時均衡網(wǎng)絡(luò)能量消耗并延長網(wǎng)絡(luò)生存時間。NS2仿真結(jié)果表明,REMA路由協(xié)議能夠顯著提高網(wǎng)絡(luò)性能,均衡網(wǎng)絡(luò)能量與負(fù)載,實現(xiàn)了延長網(wǎng)絡(luò)生存時間的目標(biāo)。本文的工作和研究成果為混合WMN能量與移動性感知路由協(xié)議研究提供了參考。
[Abstract]:Hybrid wireless Mesh networks Wireless Mesh Networks (WMNs) because of its greater network connectivity, higher network reliability and wider coverage, It is considered to be an ideal solution for wireless broadband access Internet. The routing protocol provides an effective routing basis for node communication in the network, which directly affects the network throughput, packet loss rate and other performance. The research of hybrid WMN routing is very important to improve the overall performance of the network. The existing wireless Mesh network routing research is mainly focused on the infrastructure Mesh network or client Mesh network, and the hybrid WMN routing research reports are relatively few. The mobility and energy limitation of the client will affect the stability of the path and the lifetime of the network, and the multi-hop communication of the client will lead to the diversification of communication links. The existing infrastructure Mesh routing protocol is no longer suitable for hybrid WMNs. Therefore, it is of great theoretical significance and application to design a routing protocol that takes into account the network state and the characteristics of hybrid WMN nodes for the future development of broadband wireless communication. Value. In view of the existing hybrid WMN routing protocols, the network interference is not considered synthetically. This paper proposes an energy and mobility aware energy and Mobility Aware EMA routing protocol based on the AODV protocol, which is based on the load and the mobility and energy limitation characteristics of the Mesh client. Using the new proposed energy and mobility aware routing metric (MEMA(Metric of Energy and Mobility Aware) as the routing standard, the channel utilization and routing layer path length of MAC layer will be obtained by cross-layer design. The node moving speed and residual energy of the application layer are used as the measurement parameters, considering the network interference and load, and perceiving the influence of the mobility and energy limitation of Mesh client on the network state. In order to select an optimal path with high throughput and stable throughput, a constrained forwarding mechanism is designed to optimize the EMA routing protocol for a large amount of flooding overhead caused by the client forwarding feature. The simulation results show that the performance of EMA routing protocol is significantly improved in terms of throughput, packet loss rate, average delay, network overhead and client energy consumption. In this paper, a regional Energy and Mobility hardware routing protocol is proposed, which solves the problem that the existing hybrid WMN routing protocols do not consider the influence of Mesh client energy limitation on the network lifetime. To make the selected path more stable. Rema protocol mainly improves the MEMA metric from two aspects: 1) using the average concentration to perceive the energy consumption intensity and its dispersion in the transmission range of the communication node, so as to select the region with sufficient residual energy for the network service. To achieve energy balance and prolong the network lifetime, the average dispersion is used to re-measure the impact of moving speed on the network and enhance the stability of the path. Reduced network overhead. REMA not only more accurately aware of the impact of client energy constraints and mobility on the network state, At the same time, balancing network energy consumption and prolonging network lifetime. NS2 simulation results show that the routing protocol can significantly improve network performance, balance network energy and load. The goal of prolonging the network lifetime is achieved. The work and research results in this paper provide a reference for the research of hybrid WMN energy and mobility aware routing protocols.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TN929.5

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本文編號：1495684