發(fā)布時間：2018-01-31 04:14

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

【摘要】：移動透明計算作為透明計算與移動互聯(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。移動透明計算智能終端是適用于透明計算系統(tǒng)的客戶端的一種手持設備,智能終端以透明網(wǎng)絡操作系統(tǒng)為核心,通過無線網(wǎng)絡從透明服務器上流式加載實例操作系統(tǒng)、應用程序以及用戶數(shù)據(jù)等信息。由于受到無線網(wǎng)絡帶寬的限制,移動智能終端加載實例操作系統(tǒng)等數(shù)據(jù)資源時耗時較長(即用戶平均等待時間較長),用戶體驗性能差。鑒于組播技術(shù)的高效傳輸策略,如果把無線網(wǎng)絡組播引入到移動透明計算環(huán)境中,就可以縮短用戶平均等待時間,改善用戶體驗性能。 本文主要是面向移動透明計算的無線網(wǎng)絡組播技術(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)組播分組機制。該機制主要分為兩個層次：第一層是基于資源種類分組機制,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上,基于速率分組機制,在每一個資源組內(nèi),根據(jù)用戶速率進一步劃分子組,降低用戶平均等待時間。另外,本文還提出了基于組播分組機制的兩個算法：一個是基于動態(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間最小化的子組發(fā)送的排序方案。 本文對面向透明計算組播分組機制、動態(tài)子組分組算法以及子組排序算法進行了性能分析與實例驗證,通過與現(xiàn)用單播機制對比表明,本文提出的分組機制和算法有效地縮短了用戶平均等待時間,改善了用戶體驗性能。圖12幅,表10個,參考文獻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.
【學位授予單位】：中南大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TN925.93;TP393.03

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本文編號：1478164