Retransmission optimization in CDMA random access networks

A one-persistent steady state retransmission scheme for packet collision in CDMA random access networks is analyzed. Instead of having the conventional analysis of a composite packet arrival model, the paper investigates and analyzes the new traffic and retransmission traffic of packet arrivals in CDMA systems independently, with two separate models. During the retransmission cycle, unlike in conventional packetized CDMA systems, we assume that the arrival of retransmission traffic is not Poisson distributed. A one-persistent steady state traffic distribution in retransmission provides a more realistic measure with improvements in the system throughput and delay. The paper presents the mathematical analysis and some simulation results for the proposed system. The results and analysis are useful for optimizing the network capacity of CDMA random access networks.