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Analytical Study of the Distance Change on IEEE 802.11ah Standard using Markov Chain Model

Perdana Doan, Sakhrul Amirah Amaliah, Erfianto Bayu, Marwan Abdul Aziz

International Journal of Electronics and Telecommunications

2023

Vol. 69, No. 4

745--749

This research proposed a model of Enhanced Distributed Channel Access (EDCA) scheme which is one of the techniques used in reducing collision and usually prioritized due to its contention window to determine the impact of distance change on the IEEE 802.11 ah standard. The proposed model was analyzed using the Markov Chain approach to determine the effect of distance change on collisions levels while the numerical were simulated using MATLAB. Moreover, the Markov chain solution was used to evaluate parameters such as throughput, energy consumption, and delay. The results showed the increment in RAW slot duration and the distance change for each station can reduce the performance on the standard and the scenario when the RAW slot duration was changed by 50 ms performed better than 100 ms and 250 ms.

The probabilities of the transitions between the interlocking directorates’ states based on Markov chains

Siudak Dariusz

Organizacja i Zarządzanie : kwartalnik naukowy

2019

nr 4

103--120

The article analyzes the process of changes in the interlocking directorates network using Markov chains. The probabilities of company transitions between three specific states of networking, i.e. isolation, networking outside the largest component, and networking inside the largest component, were estimated. In addition, the average probabilities of transitions between states in the next 6 quarter periods, constant probabilities of transitions independent of the initial state of the process, and the expected time of return of the chain to individual states were estimated. Regardless of the initial state of networking of the enterprise, the highest probability was obtained for the process to be found in the state of connection with the largest component.