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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网络发生业务拥塞时，可能会由于丢包、时延和抖动而导致语音质量下降。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。由于诸如路由器之类的转发设备在执行语音通信之前进行资源预留，因此使用该方法可以保证高水平的语音质量。然而，这种方法存在可扩展性问题，因为路由器需要维护每个流的信息以进行资源预留。此外，网络中的所有路由器都应支持RSVP。还有一种方法称为端点准入控制。在该方法中，只有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。本文重点研究了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式来根据使用端点之间的探测探测分组来测量的网络拥塞状态来决定是否可以接纳呼叫。本研究实现了以下几个目标：1.基于端到端测量的接纳控制机制；2.替代路径环境下的接纳控制；3.基于端到端测量的网络接纳控制的网络设计；4.试用电话；5.VoIP质量管理系统；3.端到端网络路径的瓶颈带宽测量