Deterministic and event triggered MAC protocol for industrial wireless networks

2013 ◽  
Author(s):  
Z. Iqbal ◽  
M. Gidlund ◽  
J. Akerberg
Keyword(s):  
Wireless Networks ◽  
Mac Protocol ◽  
Industrial Wireless Networks ◽  
Event Triggered

scholarly journals Design and Modeling of Self-Adapting MAC (SaMAC) Protocol with Inconstant Contention Loss Probabilities

2018 ◽  
Vol 2018 ◽  
pp. 1-25
Author(s):  
Ante Kristić ◽  
Julije Ožegović ◽  
Ivan Kedžo
Keyword(s):  
Wireless Networks ◽  
Mac Protocol ◽  
Markov Chain Model ◽  
Loss Probability ◽  
Chain Model ◽  
Industrial Wireless Networks ◽  
802.11 Dcf ◽  
Loss Probabilities ◽  
Congested Networks ◽  
A Chain

Networks based on IEEE 802.11 standard are one of the main options for deployment in industrial environment. Degradation of throughput in congested networks and short-term unfairness are well-known drawbacks of 802.11 DCF and similar MAC protocols. Those shortcomings represent significant limitation in forecasted growth of wireless usage. This is especially important in industrial wireless networks (IWN) where the scalability of wireless MAC is one of the main requirements. In this paper, a novel self-adapting MAC protocol (SaMAC) is defined and mathematically modeled. SaMAC employs constrained countdown freezing enhanced with shifted window mechanism. As a result, the protocol outperforms 802.11 DCF standard as well as shifted contention window (SCW) and constrained countdown freezing (CPCF) protocols in achieved throughput, fairness, and jitter, while keeping simple implementation. Despite protocol’s simple design, it is shown that its mathematical model is extremely complex. For proposed protocol, the assumption of constant contention loss probability, which is normally used for modeling of MAC schemes, does not hold. In the presented multidimensional Markov chain model, a unique iterative method for determining contention loss probability is developed as well as a method for throughput calculation based on such a chain. Accuracy of the presented model is verified in several network scenarios. Considering the performance of the proposed protocol, authors believe that it could be of benefit to deploy it in heavily loaded wireless networks with timing constraints, such as IWNs.

scholarly journals A Real-Time, Distributed, Directional TDMA MAC Protocol for QoS-aware Communication in Multi-hop Wireless Networks

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Shivam Garg ◽  
Venu Sri Sushma Kuchipudi ◽  
Elizabeth Serena Bentley ◽  
Sunil Kumar
Keyword(s):  
Wireless Networks ◽  
Real Time ◽  
Mac Protocol ◽  
Tdma Mac

Efficient and Reliable MPEG-4 Multicast MAC Protocol for Wireless Networks

2015 ◽  
Vol 64 (3) ◽  
pp. 1026-1035 ◽  
Author(s):  
Muhammad Khalil Afzal ◽  
Byung-Seo Kim ◽  
Sung Won Kim
Keyword(s):  
Wireless Networks ◽  
Mac Protocol
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