本文關(guān)鍵詞： 移動透明計(jì)算 智能終端 無線局域網(wǎng) 組播技術(shù) 分組機(jī)制　出處：《中南大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：移動透明計(jì)算作為透明計(jì)算與移動互聯(lián)網(wǎng)的結(jié)合體,有很大的市場潛力和良好的發(fā)展前景。移動透明計(jì)算智能終端是適用于透明計(jì)算系統(tǒng)的客戶端的一種手持設(shè)備,智能終端以透明網(wǎng)絡(luò)操作系統(tǒng)為核心,通過無線網(wǎng)絡(luò)從透明服務(wù)器上流式加載實(shí)例操作系統(tǒng)、應(yīng)用程序以及用戶數(shù)據(jù)等信息。由于受到無線網(wǎng)絡(luò)帶寬的限制,移動智能終端加載實(shí)例操作系統(tǒng)等數(shù)據(jù)資源時(shí)耗時(shí)較長(即用戶平均等待時(shí)間較長),用戶體驗(yàn)性能差。鑒于組播技術(shù)的高效傳輸策略,如果把無線網(wǎng)絡(luò)組播引入到移動透明計(jì)算環(huán)境中,就可以縮短用戶平均等待時(shí)間,改善用戶體驗(yàn)性能。 本文主要是面向移動透明計(jì)算的無線網(wǎng)絡(luò)組播技術(shù)的研究,針對于移動透明環(huán)境特性,提出了無線局域網(wǎng)組播分組機(jī)制。該機(jī)制主要分為兩個(gè)層次：第一層是基于資源種類分組機(jī)制,根據(jù)用戶申請資源的種類將用戶分到不同的資源組；第二層是在第一層的基礎(chǔ)上,基于速率分組機(jī)制,在每一個(gè)資源組內(nèi),根據(jù)用戶速率進(jìn)一步劃分子組,降低用戶平均等待時(shí)間。另外,本文還提出了基于組播分組機(jī)制的兩個(gè)算法：一個(gè)是基于動態(tài)規(guī)劃的速率子組劃分算法,在資源組內(nèi)按照速率劃分子組時(shí)調(diào)用動態(tài)子組分組算法,可以快速找到最優(yōu)分組方案；另一個(gè)是子組發(fā)送順序排序算法,根據(jù)該算法找到使得用戶平均等待時(shí)間最小化的子組發(fā)送的排序方案。 本文對面向透明計(jì)算組播分組機(jī)制、動態(tài)子組分組算法以及子組排序算法進(jìn)行了性能分析與實(shí)例驗(yàn)證,通過與現(xiàn)用單播機(jī)制對比表明,本文提出的分組機(jī)制和算法有效地縮短了用戶平均等待時(shí)間,改善了用戶體驗(yàn)性能。圖12幅,表10個(gè),參考文獻(xiàn)61篇。
[Abstract]:Mobile transparent computing is a combination of transparent computing and mobile Internet. Mobile transparent computing intelligent terminal is a kind of handheld device suitable for the client of transparent computing system. The core of the intelligent terminal is transparent network operating system. Loading instance operating system, application program and user data from transparent server through wireless network. Due to the limitation of wireless network bandwidth. The mobile intelligent terminal takes a long time to load data resources such as instance operating system (that is, the average waiting time of users is longer and the performance of user experience is poor.) in view of the efficient transmission strategy of multicast technology. If the wireless network multicast is introduced into the mobile transparent computing environment, the average waiting time of the user can be shortened and the performance of the user experience can be improved. This paper mainly focuses on the research of wireless network multicast technology for mobile transparent computing, aiming at the characteristics of mobile transparent environment. This paper proposes a multicast packet mechanism for WLAN, which is divided into two levels: the first layer is based on the grouping mechanism of resource types, which divides users into different resource groups according to the types of resources requested by users; The second layer is based on the first layer, based on the rate grouping mechanism, in each resource group, according to the user rate to further divide sub-groups, reduce the average waiting time of users. This paper also proposes two algorithms based on multicast grouping mechanism: one is the rate subgroup partition algorithm based on dynamic programming, which calls the dynamic subgroup grouping algorithm when the resource group is divided into sub-groups according to the rate. The optimal grouping scheme can be found quickly. The other is a subgroup sending order sorting algorithm, according to which we can find a sort scheme that minimizes the average waiting time of the user. In this paper, we analyze the performance of transparent computing multicast packet mechanism, dynamic subgroup grouping algorithm and sub-group sorting algorithm. The grouping mechanism and algorithm proposed in this paper can effectively shorten the average waiting time of users and improve the performance of user experience.
【學(xué)位授予單位】：中南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN925.93;TP393.03

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本文編號：1478164