scholarly journals An Insight of Backoff Algorithms in Wireless Networks

2019 ◽  
Vol 9 (1) ◽  
pp. 2043-2049
Keyword(s):  
Collision Avoidance ◽  
Ieee 802.11 ◽  
Network Performance ◽  
Sudden Change ◽  
Window Size ◽  
Common Channel ◽  
Mac Layer ◽  
Packet Collision ◽  
Ieee 802.11 Mac ◽  
802.11 Mac

The IEEE 802.11 MAC is liable for the scheme of channel accessing. It decides the performance of the WLAN and DCF is the central strategy. Stations that need to get to the divert may partake in a disseminated manner by means of CSMA/CA in the MAC layer. Packet collision can’t be totally avoided because of the nodes which are in scattered manner. MAC layer uses a BEB scheme for CA (collision avoidance).. Nodes are experiencing a collision in common channel in IEEE 802.11 and must have to backoff for a arbitrary time and selected consistently from CW. The contention window is maintained dynamically by BO algorithms. Network performance is decreased due to a sudden change in window size. Different existing algorithms for backoff and comparision among the algorithms are shown in the manuscript.

scholarly journals The Performance Evaluation of an IEEE 802.11 Network Containing Misbehavior Nodes under Different Backoff Algorithms

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Trong-Minh Hoang ◽  
Van-Kien Bui ◽  
Thanh-Tra Nguyen
Keyword(s):  
Access Control ◽  
Medium Access Control ◽  
Ieee 802.11 ◽  
Analytical Model ◽  
Network Performance ◽  
Mac Layer ◽  
Medium Access ◽  
Ieee 802.11 Mac ◽  
802.11 Mac ◽  
Throughput And Delay

Security of any wireless network is always an important issue due to its serious impacts on network performance. Practically, the IEEE 802.11 medium access control can be violated by several native or smart attacks that result in downgrading network performance. In recent years, there are several studies using analytical model to analyze medium access control (MAC) layer misbehavior issue to explore this problem but they have focused on binary exponential backoff only. Moreover, a practical condition such as the freezing backoff issue is not included in the previous models. Hence, this paper presents a novel analytical model of the IEEE 802.11 MAC to thoroughly understand impacts of misbehaving node on network throughput and delay parameters. Particularly, the model can express detailed backoff algorithms so that the evaluation of the network performance under some typical attacks through numerical simulation results would be easy.

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