Performance evaluating of small data transmissions in generalized multichannel slotted ALOHA systems

This paper presents an iterative contending-user estimation method to analyze the normalized throughput, the packet-dropping probability, the average access delay, and the variance of the access delay for finite-population slotted ALOHA system supporting multiple access-class traffic. We demonstrate the way to extend the model to accurately predict the access delay of small data transmissions in OFDMA system which is used in LTE or WiMAX systems adopting immediate-first-transmission and delayed-first-transmission protocol.