Performance Evaluation of a Hybrid Medium Access Control Protocol for Machine-to-Machine Networks

A hybrid medium access control protocol is discussed that combines slotted-ALOHA and time division multiple access technique. Here, the network operates on frame-by-frame basis where each frame contains a contention and a reservation part. The performance of the network is measured in terms of three parameters: throughput, average packet delay and reservation ratio. The objective of this paper is to find duration of contention period (CP) in a frame at which the performance of the network is maximum. To achieve this, an optimization problem is identified and a method, which uses MATLAB, is discussed to solve this problem. Moreover, the variation of parameters with data traffic is presented and the obtained results are compared with a related work already done, and our results show an average deterioration of 32.49% in throughput, improvement of 84.02% in average packet delay and, improvement of 86% in reservation ratio.