Call-level and packet-level performance modeling in cellular CDMA networks

We present a queueing analytical model to evaluate call-level and packet-level performances for uplink transmission of data calls in a voice/data cellular CDMA network. In the call-level, call admission control (CAC) is used to ensure that the cell is not overloaded and also to prioritize the handoff calls over the new calls. We assume finite queueing at the mobile to buffer the data packets for uplink transmission. The transmission rates for data calls can be adjusted to accommodate more voice and/or data calls while satisfying a minimum signal-to-interference (SIR)/rate requirement for voice/data calls. Call-level performance measures (i.e., new call blocking and handoff call dropping probabilities) for both voice and data calls and packet-level performance measures (i.e., queue throughput, packet dropping probability and delay) specifically for data calls can be obtained from our model. Impacts of the call-level parameter settings on the packet-level performance measures are investigated and typical numerical results are presented.