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Study on QoS Guarantee Mechanisms in Next Generation Networks

下一代网络QoS保障机制研究

基本信息

批准号：
11305030
负责人：
MIYAHARA Hideo
金额：
$ 5.31万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A).
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11305030/
关键词：
Multimedia Video transfer QoS guarantee Resource allocation MPEG システム資源

项目摘要

1 QoS mapping method among different system levelsWe investigate QoS mapping method among application-level QoS, network-level QoS and end-system-level QoS, considering the fact that deliverable or understandable QoS parameters differ among those system entities. Through experimentation on actual video data and systems, we show relationship among CPU resource (CPU cycles) required to encode/decode video data and network resource (bandwidth) required to transfer coded data in real-time fashion.2 Mechanisms to provide QoS in each system entityWe consider how each system entity, i.e. server, client and network, guarantee QoS to real-time video application. It is shown that employing real-time OS in end-systems and bandwidth reservation-based protocol in networks is effective to provide high-quality and real-time video transfer. We also propose the method on how end-systems communicate with each other to obtain information necessary for the resource allocation.3 QoS guarantees based on integrated resource allocation schemeIn allocating resources to real-time video transfer, we should consider availability of system resources on each entity. We propose the integrated resource allocation scheme which achieves the high-quality video transfer with limited resource while maximizing user's utility, which is represented as relation between benefit obtained through allocated resources and cost paid for them.4 Implementation and evaluation of proposed schemeWe implement and evaluate the integrated resource allocation scheme to allocate both of network and server CPU resources to clients in an integrated manner. We clarify some implementation issues and propose the solutions for them. Through experimentation on video transfer, we show that we can achieve efficient resource allocation in compliance with the system environment and provide high-quality video to users.

考虑到可交付或可理解的QoS参数在这些系统实体之间存在差异，我们研究了应用级QoS、网络级QoS和系统端级QoS之间的QoS映射方法。通过对实际视频数据和系统的实验，我们展示了编码/解码视频数据所需的CPU资源（CPU周期）与实时传输编码数据所需的网络资源（带宽）之间的关系在每个系统实体中提供QoS的机制我们考虑每个系统实体，即服务器，客户端和网络如何保证实时视频应用的QoS。研究表明，在终端系统中采用实时操作系统，在网络中采用基于带宽预留的协议，可以有效地提供高质量的实时视频传输。我们还提出了终端系统如何相互通信以获取资源分配所需信息的方法基于集成资源分配方案的QoS保证在分配实时视频传输资源时，要考虑每个实体上系统资源的可用性。我们提出了以有限的资源实现高质量视频传输，同时最大化用户效用的综合资源分配方案，用户效用表现为资源分配所获得的收益与为资源分配所付出的成本之间的关系方案的实现和评估我们实现和评估集成资源分配方案，将网络和服务器CPU资源以集成的方式分配给客户端。阐明了实施过程中存在的一些问题，并提出了相应的解决方案。通过对视频传输的实验表明，该方法可以在符合系统环境的情况下实现高效的资源分配，并为用户提供高质量的视频。