VoIP performance on differentiated services enabled network

Author

Muppala, Jogesh K. ; Bancherdvanich, Terdsak ; Tyagi, Anurag

Author_Institution

Dept. of Comput. Sci., Hong Kong Univ. of Sci. & Technol., China

fYear

2000

fDate

2000

Firstpage

419

Lastpage

423

Abstract

We study the performance of voice over Internet protocol (VoIP) traffic aggregates over differentiated services (Diffserv) enabled network using expedited forwarding (EF) per hop behavior (PHB). We compare the delay and jitter performance of the VoIP traffic generated by different standard voice codec algorithms, both under Diffserv with EF PHB and with best-effort service. Both homogenous and heterogenous voice traffic aggregates are considered. Our results show that the use of EF yields very good performance improvement for voice traffic compared to best-effort. The improvement is greatest for high coding rate algorithms like G.711 than lower coding rate algorithms like G.723.1. For heterogenous traffic aggregates, the traffic from higher bit rate codecs obtains a better performance compared to lower bit rate codecs

Keywords

Internet telephony; delays; jitter; performance evaluation; speech codecs; telecommunication traffic; Diffserv; G.711; G.723.1; VoIP performance; VoIP traffic; best-effort service; delay performance; differentiated services enabled network; expedited forwarding per hop behavior; heterogenous voice traffic; high coding rate algorithms; homogenous voice traffic; jitter performance; standard voice codec algorithms; voice over Internet protocol; Aggregates; Bit rate; Codecs; Diffserv networks; Internet telephony; Jitter; Round robin; Telecommunication traffic; Traffic control; Web and internet services;

fLanguage

English

Publisher

ieee

Conference_Titel

Networks, 2000. (ICON 2000). Proceedings. IEEE International Conference on

Print_ISBN

0-7695-0777-8

Type

conf

DOI

10.1109/ICON.2000.875824

Filename

875824