Title :
A study of AF and EF services interaction
Author :
Yang, T. ; Chen, Z. ; Makrakis, D. ; Hafid, A.
Author_Institution :
Sch. of Inf. Technol. & Eng., Ottawa Univ., Ont., Canada
Abstract :
Assured forwarding (AF) service allows the Internet service provider (ISP) to offer different levels of forwarding assurances to IP packets received from a customer. However, in a basic AF service-capable network, it is not possible to guarantee low latency and low jitter to IP packets. To support the transport of video/audio traffic with acceptable delay and jitter, the AF service is not sufficient. To rectify this, the Internet Engineering Task Force (IETF) has proposed the expedited forwarding (EF) service for the support of latency and jitter sensitive traffic. We examine the possibility of using AF service-capable networks to support the EF service. The implication of a positive answer to this question is that it will be possible to use AF service-capable networks to provide low delay and low delay jitter guarantees to video/audio-like traffic. We also analyze the impact of the EF service traffic on AF and best-effort traffic
Keywords :
Internet; delays; jitter; packet switching; queueing theory; telecommunication traffic; transport protocols; AF service-capable network; AF traffic; EF service traffic; IP packets; ISP; Internet Engineering Task Force; Internet service provider; assured forwarding; best-effort traffic; expedited forwarding; jitter sensitive traffic; latency sensitive traffic; low delay; low delay jitter guarantees; priority queuing model; services interaction; video/audio traffic; weighted round robin; Bandwidth; Communication system traffic control; Delay; Information technology; Jitter; Protection; Telecommunication traffic; Throughput; Traffic control; Web and internet services;
Conference_Titel :
Information Networking, 2001. Proceedings. 15th International Conference on
Conference_Location :
Beppu City, Oita
Print_ISBN :
0-7695-0951-7
DOI :
10.1109/ICOIN.2001.905470
