Title :
Compressed voice in integrated services frame relay networks: voice synchronization
Author :
Ansari, Rukhsana ; Kaye, A. Roger
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada
Abstract :
The simplicity of the frame relay (FR) protocol, designed primarily for data communications, makes it difficult to apply existing voice synchronization algorithms requiring network layer (OSI layer 3) processing for voice transmission. The paper presents a novel adaptive playout algorithm, designed to absorb network delay jitter by adaptive variation of the holding time of voice packets at the playout buffer. The algorithm requires no common time-reference between sender and receiver or special processing in the FR switches and has been optimized to operate in a mixed voice-data FR environment characterized by bursty interLAN Ethernet traffic. It meets the quality of service (QoS) requirements of conversational voice applications. Performance evaluation of the playout algorithm includes quantitative simulation results as well as qualitative subjective tests using speech coders
Keywords :
LAN interconnection; data communication; data compression; delays; frame relay; jitter; open systems; protocols; speech coding; synchronisation; voice communication; OSI layer 3; adaptive playout algorithm; bursty interLAN Ethernet traffic; compressed voice; conversational voice applications; data communications; holding time; integrated services frame relay networks; network delay jitter; network layer processing; performance evaluation; playout buffer; protocol; quality of service; voice packets; voice synchronization; Algorithm design and analysis; Data communication; Delay effects; Frame relay; Intserv networks; Jitter; Open systems; Protocols; Quality of service; Switches;
Conference_Titel :
Electrical and Computer Engineering, 1995. Canadian Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-2766-7
DOI :
10.1109/CCECE.1995.526616
