Mobility and Resource Management for Multimedia Mobile Computing

项目网址：http://www.ee.gatech.edu/research/labs/bwn/projects/nsf http://www.ee.cornell.edu/~haas/nsf.html在这份提案中，我们处理了多媒体移动计算中的两个核心问题，即移动性管理和连接准入。更具体地说，我们提出了这样的问题：基于微网络通信环境，如何在大规模访问的互联网(我们将网络的网络称为互联网)内有效地定位用户，以及如何在这样的环境中限制多媒体连接接纳，以保证对已经接受的连接的服务质量。我们的方法是基于用户移动性配置文件(UMP)的思想。当用户在互联网内漫游时，该系统不断收集有关用户的移动性和连接模式的信息。该信息用于预测活动用户的未来位置，从而减少了搜索空间，并因此减少了定位用户的成本。这是通过动态计算区位面积来实现的。在我们的方法中，位置区域是按移动设备定义的，当用户在不同的网络之间漫游时，使用UMP来计算位置区域。位置面积的计算是为了最小化用户的移动性管理成本。此外，嵌入在UMP中的用户未来位置的统计知识允许预测资源利用，从而降低资源短缺的概率。其结果是，多媒体连接可以在更严格的服务质量(Qos)保证下得到支持。为了达到保证服务质量的目的，我们使用了一个新的概念，称为影子团，它是用户在给定网络中当前位置的情况下，未来位置概率的表示。影子集团实际上是UMP的摘要，可以方便快捷地确定不同网络的未来资源需求S。在我们的研究中，我们将使用分析和模拟工具来解决以下问题：1.UMP信息上报和收集的最佳策略2.使用UMP来降低注册要求和用户定位成本3.将网络分组为寻呼组的方法，以降低移动寻呼成本，受制于时延约束4.使用UMP创建影子集团摘要5.使用影子集团概念来预测未来的网络资源利用率6.在连接接纳算法中使用影子集团概念显而易见，由于六个主题高度相关，密切的协作交互以及持续的信息和结果交换对于本项目的成功至关重要。为了估计我们工作的潜在影响，我们必须设想互联网服务和移动应用程序的未来使用情况。这些都是最近移动多媒体领域研究的主要内容。然而，在实现移动应用的广泛使用之前，需要解决如何管理如此大量用户的移动性和如何管理用于多媒体通信的资源的根本问题。我们的建议是朝着这个方向迈出的重要一步。

Project URL: http://www.ee.gatech.edu/research/labs/bwn/projects/nsf http://www.ee.cornell.edu/~haas/nsf.html In this proposal, we deal with two central issues in Multimedia Mobile Computing, namely Mobility Management and Connection Admission. More specifically, we ask the questions of how to efficiently locate users within massively accessed internet (we refer to a network of networks as an internet), based on the micro-networking communication environment and how to limit the multimedia connection admission in such an environment, as to guarantee quality of service to already accepted connections. Our approach is based on the idea of User Mobility Profile (UMP). As a user roams within an internet, the system continuously collects information on the users' mobility and connection patterns. This information is used to anticipate the future location of the active users, thus, reduces the search space and, consequently, the cost of locating the user. This is achieved through the dynamic calculation of location area. In our approach, the location area is defined per mobile and is calculated, using the UMP, ``on the fly,'' as the user roams between different networks. Calculation of the location area is done as to minimize the user's mobility management cost. Furthermore, the statistical knowledge of users' future positions embedded within the UMP allows prediction of resource utilization and, thus, reduces the probability of resource shortage. The result is that multimedia connections can be supported with a much stricter Quality-of-Service (QoS) guarantees. To achieve the goal of guaranteed QoS, we employ a new concept, called the Shadow Clique, which is the representation of the probability of user's future locations, given its current position in the network. The Shadow Clique is, in fact, a digest of the UMP and allows easy and fast determination of the future resource requirements in different network s. In our research we will address the following issues using both analytical and simulation tools: 1. The optimal strategy for UMP information reporting and collection 2. The use of the UMP for reducing the registration requirements and the user location costs 3. Methods for grouping the networks into paging groups, as to reduce the mobile paging costs, subject to delay constraints 4. The use of the UMP to create the Shadow Clique digest 5. The use of the Shadow Clique concept to predict the future network resource utilization 6. The use of the Shadow Clique concept in the Connection Admission algorithm It is obvious that as the six topics are highly related, a close collaborative interaction and continuous exchange of information and results is essential for the success of this project. To estimate the potential impact of our work, one must envisage the future use of the Internet services and the mobile applications. These are responsible for much of the recent research in the Mobile Multimedia field. However, before a wide-spread use of the mobile applications can be realized, the fundamental questions of how to manage the mobility of such large volume of users and how to manage the resources for multimedia communication need to be addressed. Our proposal is a significant step in this direction.