Title :
Efficiency of packet voice with deterministic delay
Author :
Baldi, Mario ; Risso, Fulvia
Author_Institution :
Politecnico di Torino, Italy
fDate :
5/1/2000 12:00:00 AM
Abstract :
Packet switching is appealing for carrying real-time traffic because it can benefit from (possibly variable bit rate) compression schemes and statistical multiplexing to more efficiently exploit network resources. This work explores the efficiency of IP telephony in terms of the volume of voice traffic carried with deterministically guaranteed quality related to the amount of network resources used. An IP network carrying compressed voice is compared to circuit switching carrying PCM (64 kb/s) encoded voice, and some design choices affecting IP telephony efficiency are discussed
Keywords :
Internet telephony; circuit switching; data compression; delays; packet switching; pulse code modulation; speech codecs; speech coding; telecommunication congestion control; telecommunication traffic; transport protocols; voice communication; 64 kbit/s; IP network; IP telephony; PCM encoded voice; call admission control; circuit switching; codecs; compressed voice; deterministic delay; deterministically guaranteed quality; network resources; packet switching; packet voice efficiency; real-time traffic; statistical multiplexing; variable bit rate compression; voice traffic; Communication system traffic control; Delay; Diffserv networks; Packet switching; Phase change materials; Protocols; Resource management; Switching circuits; Telecommunication traffic; Telephony;
Journal_Title :
Communications Magazine, IEEE
