Title :
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
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;
Conference_Titel :
Networks, 2000. (ICON 2000). Proceedings. IEEE International Conference on
Print_ISBN :
0-7695-0777-8
DOI :
10.1109/ICON.2000.875824
