Performance Analysis of Multi-Channel Slotted ALOHA Protocol Based on Power Capture and Backoff

To extend the theoretical analysis in multi-channel slotted ALOHA protocol based on power capture and backoff, some important performance measures including access success ratio, throughput and delay performance were analyzed. The protocol performance is dependent on channel load, power capture radio, the number of channels and the number of terminals. By the numerical simulation, the parameter influence on the system performance was analyzed. It is shown that smaller power capture radio lead to larger throughput, shorter delay and higher access success ratio; the larger number of channels also results in larger throughput, shorter delay and higher access success ratio. The impact of the number of terminals on throughput and access success ratio is small, and for smaller the number of terminals, delay is longer. The relative error between the theoretical results and the simulation ones was less than 2%.