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Mobile Ad-hoc Networks (MANETs) are susceptible to both insider and outsider attacks more than wired and base station-based wireless networks. This is because of the lack of a well-defined defense perimeter in MANETs, preventing the use of defenses including firewalls or intrusion detection systems. This lack of perimeter calls for implementation of security in a distributed, collaborative manner...
Unlike wired networks, random packet loss due to bit errors is not negligible in wireless networks. These networks have mobility as another challenge. This causes significant performance degradation of TCP. Different Variants of TCP exist; some have no mechanism to differentiate random losses on the wireless link from congestion and therefore treat all random losses as an indication of congestion...
This paper introduces a novel mobility-aware routing protocol (MARP) for mobile, cognitive ad-hoc networks. Traditional routing protocols trigger the routing updates after the nodes detect the route failure. Even if the link condition is getting worse which means the link is likely to break in the future, the nodes will still transmit the packets along the current path. MARP uses cognitive techniques...
Based on the relations of the QoS parameters in wireless ad hoc networks, we proposed a new route found mechanism. The new mechanism calculate the length of the routing, the throughput require of the data transmit as bandwidth, and by the most of the bandwidth require to resource reservation to meet the QoS. Simulation result shows that it can meet the QoS require if the network allow.
Traditional routing protocols designed for multihop wireless networks, e.g., the mobile ad hoc network (MANET), select a route with the smallest hop count. The end-to-end throughput in the route may not be the maximum when the network has multiple link data rates, as a small hop number implies a large geographic distance (linkdistance) for each hop. Due to the radio signal attenuation, this results...
Based on the analysis of the node selfishness and the drawback of min-hop selection method as the unique routing selection criteria in ad hoc networks, a non-intrusive multi-metric ad hoc routing protocol-NIMR is presented. By computing and storing the node fame, NIMR greatly attenuates the influence of node selfishness; By crossing-design between MAC layer and network layer, we employ a non-intrusive...
This paper proposes the design of a scalable and reliable QoS architecture for mobile ad-hoc networks, which consists of i) a multi-path routing protocol, ii) a call admission control (CAC) scheme and iii) a congestion control mechanism. The multi-path routing protocol utilizes erasure code techniques for producing replicated fragments for each packet, to enhance reliability. Important fragments can...
Wireless multi-hop network is a kind of multi-hop broadband distributed wireless network with high capacity and high transmission rate. One of the major problems of wireless networks is the capacity reduction due to the interference among multiple simultaneous transmissions. In order to effectively minimize the effect of interference, this paper presents a new routing metric called WLQM which considers...
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