Teletraffic implications of a generic ATM wireless access protocol

This paper examines the performance and efficiency of a generic ATM access protocol, which combines the principles of leaky bucket, max-min fairness and demand assigned multiple access (DAMA), to manage the transmission of ATM cells from wireless terminals/handsets to base stations. The paper proposes a new over the peak ABR service which allows transmission over the agreed ATM peak cell rate (PCR) to better utilize the radio channel. Based on traces of real bursty traffic, we demonstrate by simulation the benefit gained by implementing this new service. By simulation we evaluate the optimal wastage due to queuing and by a simple analytical model the optimal wastage due to errors. We provide the means to support optimal adaptive setting of the code rate and of the signal strength. We demonstrate that even for certain realistic SNR conditions the wastage due to errors can be very high because of retransmission.