Delay-throughput comparison of single and multi-channel slotted ALOHA networks

In networks where stations are equally likely to transmit to one another, simple slotted ALOHA is not an appropriate form of multiple access protocol as messages meant for different stations can collide in the common channel. In this paper the performance of a single channel slotted ALOHA network is compared to that of a CDMA ALOHA network where each station is assigned a different spreading code with which to receive messages, and thus effectively possesses its own private 'virtual channel'.