Knowledge-based connection admission method and apparatus for providing efficient multiplexing of data and speech over aal2

Abstract

A knowledge-based connection admission method is disclosed for efficient multiplexing of data and speech over AAL . The method uses a knowledge-based technique to decide when and what type of data traffic will be multiplexed with speech traffic in ATM Adaptation Layer (AAL ) environment. The knowledge-based connection technique supports low bit rate and delay sensitive applications such as mobile telephony in an ATM environment by maximizing the use of available bandwidth. The method includes monitoring ATM cells for a AAL connection, determining whether the ATM cells contain unused bytes and multiplexing data traffic with speech traffic on the AAL connection when the data meets a predetermined set of requirements. The method determines whether the data traffic requires a bandwidth that exceeds a bandwidth provided by the unused bytes and multiplexes the data traffic with the speech traffic when the bandwidth required by the data traffic does not exceeds the bandwidth provided by the unused bytes and prevents the multiplexing of the data traffic with the speech traffic when the bandwidth required by the data traffic exceeds the bandwidth provided by the unused bytes. The unused bytes represent silence periods during speech traffic. System observations are gathered and processed with prior knowledge about the system. Based upon the processing, whether the data traffic is suitable for multiplexing with speech traffic is determined and the data is multiplexed with the speech traffic when the data traffic is determined to be suitable for multiplexing with speech traffic in the unused bytes of the speech ATM cells.