Circuit Emulation Over IP Networks

نویسندگان

  • Raffaele Noro
  • Maher Hamdi
  • Jean-Pierre Hubaux
چکیده

The best-e ort service o ered by the Internet is not suitable for a large variety of multimedia applications, which require strict guarantees on losses and end-to-end delay. We design functionalities and mechanisms for RTP in order to provide a transport service with the properties of circuit switched networks and with the possibility of transporting both constant and variable rate streams. We consider a source that generates structured data units, which are collected in RTP packets. These packets are forwarded to an IP network and reach the receiver with a stochastic delay. An extra delay is computed (on a per-packet basis) and added at the receiver to have delay equalization. The data units in the packet are then delivered to the application at a rate speci ed in the RTP header. The total delay is a session parameter and can be adjusted by exchanging RTCP messages. The dimensioning of the receiver bu er is the rst problem to be solved. The bu er space results in a function of the network delay bounds and the maximum RTP packet size. This information can be conveyed from the source to the receiver through RTCP messages. The timing of the data delivery process and the source clock recovery are also required functionalities. They are both implemented by means of an extension to the RTP header. We developed a method for source clock recovery that removes the network induced jitter by processing the clock indications contained in some RTP header. The recovered clock is then used in combination with other information contained in the packets to control the delivery process. Simulations prove that the circuit emulation service can be implemented on top of the RTP with satisfactory performance.

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Circuit Emulation over IP Networks

Executive Summary Circuit emulation over IP networks is becoming increasingly important for service providers who want to offer new service opportunities to subscribers and cut operational costs on their existing offerings. However, there are both technical and administrative challenges to overcome before service providers can embrace circuit emulation. The primary technical challenges are cloc...

متن کامل

Circuit Emulation over Packet Switched Networks (CESoP) - White Paper

.......................................................................................................................... 2 Carrying TDM Services over a Packet Network .............................................................. 2 An Evolutionary Approach ........................................................................................... 3 Standards .....................................

متن کامل

Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Circuit Emulation Service over MPLS (CEM) Encapsulation

This document describes a historical method for encapsulating Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Path signals for transport across packet-switched networks (PSNs). The PSNs explicitly supported by this document include MPLS and IP. Note that RFC 4842 describes the standards-track protocol for this functionality, and new implementations must use RFC 4842 rather...

متن کامل

Evaluation of Novel Synchronization Algorithms for Circuit Emulation Adapters

Packet switching technologies such as Gigabit Ethernet or IP over WDM are gradually replacing the traditional telephony (PDH/SDH) networks due to their ability to transport data traffic at very high rates. Connecting UMTS/GSM base stations over Metropolitan Gigabit Ethernets has a great potential of cost savings. In our scenario telephony base stations are connected to the core PDH network thro...

متن کامل

RFC 5143 SONET / SDH Circuit Emulation over MPLS February 2008

This document describes a historical method for encapsulating Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Path signals for transport across packet-switched networks (PSNs). The PSNs explicitly supported by this document include MPLS and IP. Note that RFC 4842 describes the standards-track protocol for this functionality, and new implementations must use RFC 4842 rather...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 1999