METHOD FOR CALL ADMISSION IN PACKET VOICE SYSTEM USING STATISTICAL MULTIPLEXING AND DYNAMIC VOICE ENCODING

摘要

An AAL2/SSCS packet voice system multiplexes various forms of voice-bandtraffic including voice packets, fax packets, and data packets into a virtual circuit (VC).This AAL2/SSCS packet voice system executes a dynamic call admission algorithm thattakes into account call type in deciding whether to admit a new call to the VC. Inparticular, this approach takes into account different bandwidth needs for different calltypes. The AAL2/SSCS packet voice system also performs bit or block dropping on voicepackets to mitigate the effects of traffic congestion. The bit or block dropping is donebased on the packet queue fill value exceeding at least one queue threshold. Further, theAAL2/SSCS packet voice system also dynamically varies a queue threshold as a functionof capacity.