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While several papers and standards promote ATMin combination with the ATM Adaptation Layer Type 2 (AAL2) as the basic switching and multiplexing technology for 3d generation mobile access networks, very few work addresses the issue of AALZ Call Admission Control (CAC). The hardship of AALZ CAC comes from the fact that AAL2, unlike ATM, supports variable packet size traffic. In addition, when applied in the cellular environment, the AALZ CAC needs to co-operate with the radio interface (RI) resource management. In this paper we develop and compare AAL2 CAC algorithms that operate on the AALZ traffc parameters currently considered by the ITU-T. Based on this comparison we find that one of these algorithms, employing the well-known Hoeffding inequality provides a reasonable trade-off between complexity and precision.

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