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.

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.

Ip Header Compression in IEEE 802.11 Mac Layer

2013 ◽  
Vol 376 ◽  
pp. 476-480
Author(s):  
Mythili Boopathi ◽  
M.P. Vani
Keyword(s):  
Ieee 802.11 ◽  
Mac Layer ◽  
Medium Access ◽  
Header Compression ◽  
Ieee 802.11 Mac ◽  
802.11 Wlan ◽  
The Moment ◽  
802.11 Mac ◽  
Ip Packet ◽  
Control Layer

In many services and applications the payload of the IP packet is almost of the same size or even smaller than the header. Over the end-to-end connection, comprised of multiple hops, these protocol headers are extremely important but over just one link (hop-to-hop) these headers serve no useful purpose. It is necessary to compress those headers, to save the bandwidth and use the expensive resources efficiently. To address this, we present an IP Header Compression (IPHC) technique for header compression. IEEE 802.11 (WLAN) is a technology that will play an important role in the next generations of wireless networks. WLAN technology doesnt support header compression techniques as part of the Medium Access Control layer at the moment. Header compression techniques such as IP Header Compression (IPHC) can be used to reduce the overhead of the IP-based traffic. The proposed system describes implementation of IPv4 and TCP header compression using IPHC as part of IEEE 802.11 MAC layer.

FH-MAC

2011 ◽  
pp. 313-329
Author(s):  
Djamel Tandjaoui ◽  
Messaoud Doudou ◽  
Imed Romdhani
Keyword(s):  
Access Control ◽  
Medium Access Control ◽  
Ieee 802.11 ◽  
Wireless Mesh Networks ◽  
Control Method ◽  
Mesh Networks ◽  
Mac Protocol ◽  
Medium Access ◽  
Wireless Mesh ◽  
Channel Diversity

In this article, the authors propose a new hybrid MAC protocol named H-MAC for wireless mesh networks. This protocol combines CSMA and TDMA schemes according to the contention level. In addition, it exploits channel diversity and provides a medium access control method that ensures the QoS requirements. Using ns-2 simulator, we have implemented and compared H-MAC with other MAC protocol used in Wireless Network. The results showed that H-MAC performs better compared to Z-MAC, IEEE 802.11 and LCM-MAC.

FH-MAC

2009 ◽  
Vol 1 (4) ◽  
pp. 40-56
Author(s):  
Djamel Tandjaoui ◽  
Messaoud Doudou ◽  
Imed Romdhani
Keyword(s):  
Access Control ◽  
Medium Access Control ◽  
Ieee 802.11 ◽  
Wireless Mesh Networks ◽  
Control Method ◽  
Mesh Networks ◽  
Mac Protocol ◽  
Medium Access ◽  
Wireless Mesh ◽  
Channel Diversity

In this article, the authors propose a new hybrid MAC protocol named H-MAC for wireless mesh networks. This protocol combines CSMA and TDMA schemes according to the contention level. In addition, it exploits channel diversity and provides a medium access control method that ensures the QoS requirements. Using ns-2 simulator, we have implemented and compared H-MAC with other MAC protocol used in Wireless Network. The results showed that H-MAC performs better compared to Z-MAC, IEEE 802.11 and LCM-MAC.

scholarly journals Cooperative ARQ: A Medium Access Control (MAC) Layer Perspective

10.5772/9476 ◽  
2010 ◽  
Author(s):  
Jesus Alonso-Zarate ◽  
Elli Kartsakli ◽  
Luis Alonso ◽  
Christos Verikoukis
Keyword(s):  
Access Control ◽  
Medium Access Control ◽  
Mac Layer ◽  
Medium Access ◽  
Cooperative Arq
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