Performance analysis of the IEEE 802.15.7 CSMA/CA algorithm based on Discrete Time Markov Chain (DTMC)

IEEE 802.15.7 is introduced to standardize the visible light communication system for connecting devices via visible light spectrum. A slotted CSMA/CA MAC protocol defined in the standard to coordinate channel access for numbers of the optical wireless devices. In this paper, we proposed a simple Discrete Time Markov Chain (DTMC) model for modeling the behavior of the Contention Access Period (CAP) of the IEEE 802.15.7 to acquire valuable insights and inner workings of the protocol. The throughput and packet delivery reliability of the Contention Access Period (CAP) of the IEEE 802.15.7 are analyzed. Ns-2 simulations are used to verify the accuracy of the proposed model. The results between the proposed model and ns-2 simulation are closely matched with about 4 percent accuracy. Thus, verify the accuracy of the proposed model.