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End-tn-End Measurement-Based Admission control

基于端到端测量的准入控制

基本信息

批准号：
14350199
负责人：
MASE Kenichi
金额：
$ 9.47万
依托单位：
Niigata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2005
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14350199/
关键词：
VoIP Admission Control Internet Measurement QoS MOS SIP Voice Quality MoS VolP

项目摘要

When the traffic congestion occurs in VoIP network, voice quality may be degraded due to packet loss, delay and jitter. Admission control is required to limit the number of on-going VoIP sessions to maintain voice transmission quality. To this aim, a signaling protocol such as RSVP (Resource reservation Protocol) can be used. High level quality of voice quality is guaranteed with this method, since the forwarding devices such as the router make resource reservation before performing voice communication. However, this method suffers from scalability problems, because routers need to maintain per flow information for resource reservation. Moreover, all routers in the network should support RSVP. There is another method called end point admission control. In this method, only source and destination nodes are in charge of admission control and intermediate routers has no special functions for admission control, leading to higher scalability. This research focuses on end-to-end measurement-based admission control and quality of services management methods. The proposed method employs a way to make a decision of whether a call can be admitted or not depending on the network congestion state that is measured using probing probe packets between end points. This research has achieved several goals as listed below.1.Mechanisms for end-to-end measurement-based admission control.2.Admission control with alternate path environment.3.Network design for networks with end-to-end measurement-based admission control.4.Trial implementation of phone5.VoIP quality management systemBottleneck bandwidth measurement for an end-to-end network path

当VoIP网络中出现业务拥塞时，由于分组丢失、延迟和抖动，语音质量可能会下降。需要准入控制来限制正在进行的VoIP会话的数量，以保持语音传输质量。为此，可以使用诸如RSVP（资源预留协议）的信令协议。由于诸如路由器的转发设备在执行语音通信之前进行资源预留，因此利用该方法保证了语音质量的高水平质量。然而，这种方法具有可扩展性的问题，因为路由器需要维护每个流的资源预留信息。此外，网络中的所有路由器都应该支持RSVP。还有另一种方法称为端点准入控制。该方法只由源节点和目的节点负责接纳控制，中间路由器没有专门的接纳控制功能，具有较高的可扩展性。本文主要研究基于端到端测量的接纳控制和服务质量管理方法。所提出的方法采用一种方法来决定是否可以接纳呼叫或不取决于网络拥塞状态，使用端点之间的探测探测包测量。本文的主要研究内容如下：1.基于端到端测量的接纳控制机制; 2.基于替代路径环境的接纳控制; 3.基于端到端测量的接纳控制网络设计; 4. VoIP质量管理系统; 5.端到端网络路径瓶颈带宽测量