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This paper presents a new MAC (Medium Access Control) spoofing detection algorithm in IEEE 802.11 networks. The proposed algorithm utilizes PLCP (Physical Layer Convergence Protocol) header of IEEE 802.11 frames to differentiate an attacker station from a genuine station. PLCP header of IEEE 802.11 frames maybe change for each frame. It depends on transmission rate adaptation algorithm which is designed...
Coping with collisions is one of the biggest challenges in the design of MAC algorithms for wireless networks. Recent advances in MIMO communications have provided the possibility of simple detection of colliding packets. In this paper, we introduce a new MIMO/MPR-aware cross-layer MAC/PHY design that is capable of combating collisions through the use of a multiple packet reception technique. Analytical...
A smart radio algorithm to supplement the adaptive frequency hopping (AFH) scheme used by Bluetooth devices is developed and studied. The investigation focuses on the media access control (MAC) layer of the Bluetooth. Collision detection, and Bluetooth channel hopping information are used to detect when an IEEE 802.11 wireless access point (AP) is operating and the AP's radio frequency (RF) channel...
This paper proposes a novel backoff algorithm to enhance the distributed coordination function (DCF) function in IEEE 802.11 based wireless networks. The proposed algorithm, known as pause count backoff (PCB) algorithm, observes the number of backoff counter pauses during the channel access contention and sets the appropriate contention window, based on the estimated results. We evaluate the performance...
Wireless network coding has the potential to enhance the capacity of wireless mesh networks (WMNs). However, most of the work considering the practical deployment of network coding in WMNs considers only IEEE 802.11 based medium access control (MAC) layers. The recent emergence of sophisticated MAC standards supporting WMNs (e.g. IEEE 802.16) make it necessary to view the deployment issues for network...
This paper proposes a fast forward medium access control protocol (FFMAC) for quality-of-service (QoS) guarantee in multihop IEEE 802.11s wireless mesh networks with multiple channels. To the best of our knowledge, the proposed protocol is the first one which considers the multihop and multichannel issues simultaneously. It provides higher priority for real-time applications, while remaining the distributed...
In this paper, we address the issue of transmission power control (TPC) in wireless ad hoc networks. Power control plays an important role in energy saving and network performance enhancement. However, the existing TPC schemes either face the problem of hidden and exposed terminal or have additional hardware requirements. We propose a novel distributed power control protocol, called Receiver Initiated...
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