面向移动透明计算的无线局域网组播技术研究

发布时间：2018-01-31 04:14

本文关键词： 移动透明计算智能终端无线局域网组播技术分组机制　出处：《中南大学》2014年硕士论文　论文类型：学位论文

【摘要】：移动透明计算作为透明计算与移动互联网的结合体,有很大的市场潜力和良好的发展前景。移动透明计算智能终端是适用于透明计算系统的客户端的一种手持设备,智能终端以透明网络操作系统为核心,通过无线网络从透明服务器上流式加载实例操作系统、应用程序以及用户数据等信息。由于受到无线网络带宽的限制,移动智能终端加载实例操作系统等数据资源时耗时较长(即用户平均等待时间较长),用户体验性能差。鉴于组播技术的高效传输策略,如果把无线网络组播引入到移动透明计算环境中,就可以缩短用户平均等待时间,改善用户体验性能。本文主要是面向移动透明计算的无线网络组播技术的研究,针对于移动透明环境特性,提出了无线局域网组播分组机制。该机制主要分为两个层次：第一层是基于资源种类分组机制,根据用户申请资源的种类将用户分到不同的资源组；第二层是在第一层的基础上,基于速率分组机制,在每一个资源组内,根据用户速率进一步划分子组,降低用户平均等待时间。另外,本文还提出了基于组播分组机制的两个算法：一个是基于动态规划的速率子组划分算法,在资源组内按照速率划分子组时调用动态子组分组算法,可以快速找到最优分组方案；另一个是子组发送顺序排序算法,根据该算法找到使得用户平均等待时间最小化的子组发送的排序方案。本文对面向透明计算组播分组机制、动态子组分组算法以及子组排序算法进行了性能分析与实例验证,通过与现用单播机制对比表明,本文提出的分组机制和算法有效地缩短了用户平均等待时间,改善了用户体验性能。图12幅,表10个,参考文献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.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN925.93;TP393.03

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