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In this paper, a throughput-driven design technique is proposed, in which a suspicious timing error prediction circuit is inserted to monitor the signal transitions at some selected check points. Unlike previous works where timing errors are detected after their occurrence, the proposed method tries to use the real intermediate signal transitions for timing error prediction. The check point selection...
With the rapid growth of the Internet, deploying energy-efficient networking technology is an urgent matter. In particular, wireless LAN (WLAN), which is widely used due to its ease of deployment and low cost of installation, is also required to be energy efficient. For this purpose, R & D activities for Radio-On-Demand-Networks (ROD) have been proposed. In ROD networks, access points (APs) have...
Multihop wireless networks (MWNs) can dynamically extend the coverage area of wireless local area networks (LANs). Communication performance of MWNs that use a single channel decreases due to interference between nodes occurring when frames are being relayed. In this paper, we proposed an autonomous dynamic transmission scheduling scheme for MWNs that is based on the behavior of neighbor nodes. In...
Routing is a key factor in the design of modern communication networks, especially in wireless ad-hoc networks (WANs). In WANs, both selfish and malicious nodes are the misbehaving nodes and are significant routing and security problems. The proposed mechanism presents a trust model to detect selfish and malicious nodes to avoid these nodes becoming routing nodes. In addition, the proposed paper provides...
Congestion in Wireless Sensor Networks (WSN) can be a severe problem, as it causes a plethora of malfunctions such as packet loss, lower throughput, energy inefficiency, and short lifetime. As a result, the performance of the whole network is subject to undesirable change; an issue that renders congestion control an issue of uttermost importance for such networks. As far as data-collection applications...
In this paper, we propose a novel TCP congestion control algorithm, named TCP SPC, which improves upon the performance of TCP Reno in wireless networks. TCP SPC exploits statistic process control (SPC) methods that have been used effectively in a variety of monitoring and control applications other than TCP. A TCP SPC sender uses RTT statistics to judge the network status, whereby the congestion window...
In this paper, we present two loop free alternative path (LFAP) computation algorithms for the seamless soft handoff (SHO) architecture proposed in [5] and its performance for tactical wireless mobile ad hoc networks. The proposed handoff architecture consists of several key components such as LFAP computation module, link quality prediction module, and link monitoring module. The key idea of the...
We present a novel MAC scheme for solving the QoS parameter adjustment problem in IEEE 802.11e EDCA. The default values of the QoS parameters in EDCA, contention window (CW), arbitration Interframe Space (IFS) etc only yield good performance for few scenarios. We first propose a simple adaptation scheme, called a-EDCA, where the access point adapts the CWs based on the network conditions. The main...
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