Efficiency of AAL2 for voice transport: simulation comparison with AAL1 and AAL5

We evaluate the efficiency of AAL2 for voice transport in ATM networks using a simulation approach. After highlighting some of the general characteristics of AAL2, we adopt as the QoS requirement a bound on the K/sup th/ percentile delay in the AAL transmitter. We then determine the maximum number of homogeneous voice sources of a given bit rate that can be supported on a given bandwidth without violating this QoS requirement for AAL1, AAL2 and AAL5. Comparisons with simple analytical approximations are also provided. We conclude that AAL2 can support approximately 5 times as many 8 kb/s voice users as either AAL1 or AAL5, but all AALs can support approximately the same number of 64 kb/s users.