Abstract
Presents a discrete Markov chain based analytic framework for the study of DS-CDMA with slotted ALOHA (DS-CDMA-S-ALOHA) random access protocols. The key feature of the work is that it distinguishes between the two stages in the transmission process, namely the access stage and the reception stage, which characterize the random access and the random errors associated with DS-CDMA-S-ALOHA respectively. Two DS-CDMA-S-ALOHA protocols are presented and analyzed. The performance of the protocols and the effects of the design parameters are evaluated numerically and compared with a bandwidth equivalent multi-channel slotted ALOHA system. The results show that with proper design, the DS-CDMA-S-ALOHA protocols can double the throughput with respect to that of a bandwidth equivalent multi-channel slotted ALOHA system.
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