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-band traffic including voice packets, fax packets, and data packets into a virtua l circuit (VC). This AAL2/SSCS packet voice system executes a dynamic call admission algorit hm that takes into account call type in deciding whether to admit a new call to the VC. In particular, this approach takes into account different bandwidth needs for d ifferent call types. The AAL2/SSCS packet voice system also performs bit or block dropping on voice packets to mitigate the effects of traffic congestion. The bit or block drop ping is done based on the packet queue fill value exceeding at least one queue threshold. Further, the AAL2/SSCS packet voice system also dynamically varies a queue threshold as a function of capacity.