An efficient distributed, dynamic traffic control in a frequency hopping CDMA system

A decentralized traffic congestion control algorithm for a frequency hopping code-division multiple-access (FH-CDMA) communication system is proposed. It utilizes one of the unique characteristics of a frequency hopping communication: each user can monitor and estimate the traffic in the channel by receiver table(s). This characteristic, in conjunction with a previous study of retransmission strategy and multiple block transmissions with error detection in a FH-CDMA system, enables individual users to adjust their packet transmission rates depending on their current status and the traffic condition in the channel. The proposed algorithm shows that the system does not suffer from channel saturation in bursty heavy traffic arrivals, thus maintaining the maximum throughput of the system. Significantly reduced retransmission delay, is obtained by allowing immediate retransmissions after repeat requests