scholarly journals Dynamic Cognitive Self-Organized TDMA for Medium Access Control in Real-Time Vehicle to Vehicle Communications

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Mario Manzano ◽  
Felipe Espinosa ◽  
Ángel M. Bravo-Santos ◽  
Enrique Santiso ◽  
Ignacio Bravo ◽  
...  
Keyword(s):  
Access Control ◽  
Medium Access Control ◽  
Real Time ◽  
Transport Systems ◽  
Mobile Environment ◽  
Medium Access ◽  
Adaptation Capacity ◽  
Original Proposal ◽  
Comparison Results ◽  
Time Division

The emergence of intelligent transport systems has brought out a new set of requirements on wireless communication. To cope with these requirements, several proposals are currently under discussion. In this highly mobile environment, the design of a prompt, efficient, flexible, and reliable medium access control, able to cover the specific constraints of the named real-time communications applications, is still unsolved. This paper presents the original proposal integrating Non-Cooperative Cognitive Time Division Multiple Access (NCC-TDMA) based on Cognitive Radio (CR) techniques to obtain a mechanism which complies with the requirements of real-time communications. Though the proposed MAC uses a slotted channel, it can be adapted to operate on the physical layer of different standards. The authors’ analysis considers the IEEE WAVE and 802.11p as the standards of reference. The mechanism also offers other advantages, such as avoiding signalling and the adaptation capacity to channel conditions and interferences. The solution is applied to the problem of units merging a convoy. Comparison results between NCC-TDMA and Slotted-Aloha are included.

Time division multiple access scheduling strategies for emerging vehicular ad hoc network medium access control protocols: a survey

2019 ◽  
Vol 70 (4) ◽  
pp. 595-616 ◽  
Author(s):  
Abubakar Bello Tambawal ◽  
Rafidah Md. Noor ◽  
Rosli Salleh ◽  
Christopher Chembe ◽  
Mohammad Hossein Anisi ◽  
...  
Keyword(s):  
Access Control ◽  
Medium Access Control ◽  
Ad Hoc Network ◽  
Multiple Access ◽  
Ad Hoc ◽  
Time Division Multiple Access ◽  
Medium Access Control Protocols ◽  
Medium Access ◽  
Scheduling Strategies ◽  
Time Division

scholarly journals Detection and Prevention of De-authentication Attack in Real-time Scenario

2019 ◽  
Vol 8 (10) ◽  
pp. 3324-3330
Keyword(s):  
Access Control ◽  
Medium Access Control ◽  
Real Time ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Denial Of Service ◽  
Area Network ◽  
Security Threat ◽  
Dos Attack ◽  
Medium Access

Wireless Local Area Network (WLAN) is an infrastructure network in which nodes are connected to a centralized system to provide Internet access to mobile users by radio waves. But WLANs are vulnerable to Medium Access Control (MAC) layer Denial of Service (DoS) attacks due to the susceptibility of the management frames. An attacker can spoof the MAC address of the legitimate client and perform de-authentication attack to disconnect WLANs users from the access point. Many free tools are available in Kali Linux Operating System (OS) by which this attack can be performed and cause a security threat to WLAN users. The consequences of de-authentication DoS attack are frequent disconnection from Internet, traffic redirection, man-in-the-middle attack, and congestion. Despite enormous efforts in combating de-authentication DoS attack in the past decade, this attack is still a serious threat to the security of the cyber world. Medium Access Control Spoof Detection and Prevention (MAC SDP) DoS algorithm performs detection and prevention of de-authentication attack caused by spoofing MAC address. This algorithm is modified to make it more immune to the de-authentication attack and implemented in real-time scenario. The results show that the proposed technique increases the packet flow rate by 20.36%, reduces the packet loss by 95.71%, and reduces the down time and recovery time by 0.39 sec and 0.9 sec respectively as compared to MAC SDP DoS algorithm.

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