Learning automata-based virtual backoff algorithm for efficient medium access in vehicular ad hoc networks

2013 ◽  
Vol 59 (10) ◽  
pp. 968-975 ◽  
Author(s):  
P. Venkata Krishna ◽  
Sudip Misra ◽  
V. Saritha ◽  
Harshit Agarwal ◽  
Naveen Chilamkurti
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Learning Automata ◽  
Medium Access ◽  
Backoff Algorithm ◽  
Hoc Networks

scholarly journals Review of MAC Protocols for Vehicular Ad Hoc Networks

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6709
Author(s):  
Mengyuan Ma ◽  
Kai Liu ◽  
Xiling Luo ◽  
Tao Zhang ◽  
Feng Liu
Keyword(s):  
Ad Hoc Networks ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Single Channel ◽  
Hierarchical Structures ◽  
Mac Protocols ◽  
Medium Access ◽  
Design And Optimization ◽  
Advantages And Disadvantages ◽  
Hoc Networks

Vehicular ad hoc networks (VANETs) need to support the timely end-to-end transmissions of safety and non-safety messages. Medium access control (MAC) protocols can ensure fair and efficient sharing of channel resources among multiple vehicles for VANETs, which can provide timely packet transmissions and significantly improve road safety. In this paper, we review the standards of some countries for VANETs. Then, we divide the MAC protocols proposed for VANETs into single-channel MAC protocols and multi-channel MAC protocols according to the number of physical occupied spectrum resources. Both are further discussed based on their hierarchical structures, i.e., distributed and centralized structures. General design and optimization mechanisms of these commonly used MAC protocols for VANETs are reviewed. From the viewpoint of 7 aspects, we compare the advantages and disadvantages of these typical MAC protocols. Finally, we discuss the open issues to improve the MAC performance and future work on MAC design for VANETs.

ABCR-STC: An Improved Adaptive Backoff Algorithm for MAC Protocol in Ad Hoc Networks

2010 ◽  
Vol 40-41 ◽  
pp. 462-468 ◽  
Author(s):  
Xiao Yun Chen ◽  
Sha Liu ◽  
Long Jie Li
Keyword(s):  
Ad Hoc Networks ◽  
Ad Hoc Network ◽  
Ad Hoc ◽  
Mac Protocol ◽  
Network Environment ◽  
Medium Access ◽  
Backoff Algorithm ◽  
Access Protocols ◽  
Medium Access Protocols ◽  
Hoc Networks

The performance of backoff algorithm plays an important role in designing efficient Medium Access Protocols for Ad hoc networks. In this paper, we propose three backoff algorithms for Ad hoc networks. The first algorithm aims at higher fairness, and the second aims at stronger adaptivity. Then, we combine the first two algorithms to propose an optimized backoff algorithm. We use NS2 to simulate Ad hoc network environment to evaluate the performance of our improved backoff algorithms. The results show that our algorithms exhibit a significant improvement in throughput and fairness with the existing BEB and AASC algorithm.

scholarly journals Medium access control in vehicular ad hoc networks

2009 ◽  
Vol 11 (7) ◽  
pp. 796-812 ◽  
Author(s):  
Supeng Leng ◽  
Huirong Fu ◽  
Qing Wang ◽  
Yan Zhang
Keyword(s):  
Access Control ◽  
Ad Hoc Networks ◽  
Medium Access Control ◽  
Vehicular Ad Hoc Networks ◽  
Ad Hoc ◽  
Medium Access ◽  
Hoc Networks

scholarly journals Optimized Adaptive Back off Algorithm for Static and Mobile Wireless Ad hoc Networks

2020 ◽  
Vol 8 (5) ◽  
pp. 998-1002
Keyword(s):  
Ad Hoc Networks ◽  
Wireless Ad Hoc Networks ◽  
Ad Hoc ◽  
Delivery Ratio ◽  
Mobile Nodes ◽  
Medium Access ◽  
Mobile Wireless ◽  
Backoff Algorithm ◽  
Hoc Networks ◽  
Packet Drop

In wireless ad hoc networks with stationary and portable nodules situation, planning a backoff procedure is decisive to evade impact and to increase the act of nodules. Majority of the Medium Access Control (MAC) etiquettes intended for ad hoc networks take up stationary nodules situation. In this paper, an Optimized Adaptive Backoff Algorithm (OABA) is proposed for static and mobile wireless ad hoc networks. In this algorithm, during the back off stage, the type of node is determined as static or mobile. For mobile nodes, their residence time is determined in addition to their priority. Then optimized adaptive backoff algorithm is applied, by checking the type of node. Simulation results have shown that OABA achieves higher delivery ratio with minimized delay, packet drop and energy consumption.

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