本文選題：異構(gòu)無線網(wǎng)絡(luò)　切入點(diǎn)：接入選擇　出處：《浙江大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：在未來的通信系統(tǒng)中,多種無線接入技術(shù)共存。不同接入網(wǎng)絡(luò)的技術(shù)特點(diǎn)不同,沒有任何一種無線接入技術(shù)可以在帶寬、時(shí)延、移動(dòng)性支持能力、覆蓋范圍等方面滿足用戶的全部需求,異構(gòu)無線網(wǎng)絡(luò)的融合成為必然。為了能夠充分利用網(wǎng)絡(luò)資源,實(shí)現(xiàn)終端在異構(gòu)無線網(wǎng)絡(luò)環(huán)境下的無縫漫游,必須采用高性能的垂直切換方案。在垂直切換過程中,網(wǎng)絡(luò)的接入選擇十分關(guān)鍵。本文以此為切入點(diǎn)進(jìn)行研究。 本文首先介紹了異構(gòu)無線網(wǎng)絡(luò)下的移動(dòng)性管理技術(shù)和垂直切換技術(shù),總結(jié)了常見的網(wǎng)絡(luò)接入選擇策略和算法。針對傳統(tǒng)模糊邏輯選網(wǎng)算法切換時(shí)延大的缺點(diǎn),論文提出了一種基于低復(fù)雜度模糊邏輯的異構(gòu)無線網(wǎng)絡(luò)接入選擇算法。該算法采用粗糙集對傳統(tǒng)模糊邏輯選網(wǎng)算法進(jìn)行優(yōu)化,篩選出對選網(wǎng)結(jié)果影響大的核心輸入?yún)⒘俊７抡娼Y(jié)果表明,該算法可以在保證選網(wǎng)準(zhǔn)確率條件下,大幅降低切換時(shí)延。 針對多用戶多網(wǎng)絡(luò)選網(wǎng)場景,本文提出了一種基于匹配博弈的選網(wǎng)策略。分別定義了用戶與網(wǎng)絡(luò)的效用函數(shù)和匹配窗口,并在此基礎(chǔ)上提出了基于匹配博弈的選網(wǎng)方法,該選網(wǎng)方法能夠兼顧用戶與網(wǎng)絡(luò)的效用。仿真結(jié)果表明,基于匹配博弈的選網(wǎng)策略具有較低的阻塞率和較高的選網(wǎng)效率。
[Abstract]:In future communication systems, many wireless access technologies coexist. Different access networks have different technical characteristics. No wireless access technology can support bandwidth, delay and mobility. In order to make full use of network resources and realize terminal seamless roaming in heterogeneous wireless network environment, the integration of heterogeneous wireless network becomes inevitable. It is necessary to adopt a high performance vertical handoff scheme. In the process of vertical handoff, the network access selection is very important. This paper first introduces mobility management technology and vertical handoff technology in heterogeneous wireless networks, summarizes common network access selection strategies and algorithms. This paper presents an access selection algorithm for heterogeneous wireless networks based on low complexity fuzzy logic, which uses rough set to optimize the traditional fuzzy logic network selection algorithm. The core input parameters which have a great influence on the network selection results are selected. The simulation results show that the proposed algorithm can greatly reduce the handoff delay under the condition of ensuring the accuracy of the network selection. In this paper, a network selection strategy based on matching game is proposed for multi-user and multi-network network selection scenarios. The utility function and matching window of user and network are defined, and a network selection method based on matching game is proposed. The simulation results show that the network selection strategy based on matching game has lower blocking rate and higher network efficiency.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN92

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本文編號：1633655