scholarly journals The Effect of Multiple Access Categories on the MAC Layer Performance of IEEE 802.11p

2020 ◽  
Author(s):  
Geeth P. Wijesiri ◽  
Jussi Haapola ◽  
Tharaka Samarasinghe
Keyword(s):  
Multiple Access ◽  
Ieee 802.11P ◽  
Mac Layer

scholarly journals An Efficient Source Location Privacy Protection Algorithm Based on Circular Trap for Wireless Sensor Networks

Symmetry ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 632 ◽  
Author(s):  
Yiting Wang ◽  
Liang Liu ◽  
Wenzhao Gao
Keyword(s):  
Multiple Access ◽  
Location Privacy ◽  
Source Location ◽  
Wireless Sensor ◽  
Cross Layer ◽  
Data Loss ◽  
Mac Layer ◽  
Source Location Privacy ◽  
Location Privacy Protection ◽  
Time Division

With the aim of addressing the problem of high overhead and unstable performance of the existing Source Location Privacy (SLP) protection algorithms, this paper proposes an efficient algorithm based on Circular Trap (CT) which integrates the routing layer and MAC layer protocol to provide SLP protection for WSNs. This algorithm allocates time slots for each node in the network by using Time Division Multiple Access (TDMA) technology, so that data loss caused by channel collisions can be avoided. At the same time, a circular trap route is formed to induce an attacker to first detect the packets from the nodes on the circular route, thereby moving away from the real route and protecting the SLP. The experimental results demonstrate that the CT algorithm can prevent the attacker from tracking the source location by 20% to 50% compared to the existing cross-layer SLP-aware algorithm.

scholarly journals Energy Efficiency TDMA/CSMA Hybrid Protocol with Power Control for WSN

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Xin Yang ◽  
Ling Wang ◽  
Jian Xie ◽  
Zhaolin Zhang
Keyword(s):  
Energy Efficiency ◽  
Power Control ◽  
Multiple Access ◽  
Carrier Sense Multiple Access ◽  
Mac Layer ◽  
Medium Access ◽  
Practical Applications ◽  
Control Scheme ◽  
Time Division ◽  
The Internet Of Things

Wireless sensors network (WSN) is widely used in the Internet of Things at present. However, limited energy source is a critical problem in the improvement and practical applications of WSN, so it is necessary to improve the energy efficiency. As another important evaluation criterion of transmission performance, throughput should be improved too. To mitigate both of the problems at the same time, by taking the advantages of Time Division Multiple Access (TDMA) and Carrier Sense Multiple Access (CSMA) at the medium access control (MAC) layer of WSN, we propose a hybrid TDMA/CSMA MAC layer protocol. Meanwhile, we design a novel power control scheme to further reduce the energy consumption and optimize the transmission slots. The simulation results demonstrate that the proposed protocol significantly improves the throughput and energy efficiency.

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