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A reputation system for MANETs is described that attempts to deduce nodal trustworthiness (forwarding behaviour) from observed end-to-end path performance. The trustworthiness deduction algorithm produces interval estimates and works well if node misbehaviour is not selective with respect to traversing paths. Nodal reputation levels are next calculated in the spirit of generous tit-for-tat so as to...
Monitoring systems using Wireless Body Area Networks (WBANs) are becoming more and more popular and widely used to respond to the increasing demand in real time healthcare applications. When operating in group, the WBANed people could form an ad-hoc network remotely monitored via Internet, help each other to relay their data and thus prolong their lifetime. In fact, if a BAN coordinator reaches critical...
Wireless sensor networks (WSNs) usually work under harsh environment, so high packet loss rate is induced by the unreliable and error-prone wireless links. To cope with the problem, a competition and cooperation based reliable forwarding protocol (CCRF) is proposed. In CCRF, the characteristic of dense deployment of sensor nodes and broadcast feature of the wireless channel in WSN are utilized. Specifically,...
The schemes detecting and mitigating routing misbehavior in other wireless networks are not suitable for Wireless Mesh Network (WMN), whereas the researchers do not pay much attention to WMN's routing misbehavior. We present a new scheme for WMN in this paper. Differing from existing schemes, mobile client nodes do not add new functions, whereas mesh routers detect and mitigate routing misbehavior...
The use of small portables and mobile devices has made MANETs (mobile ad hoc networks) very popular. A MANET is a network composed by a group of mobile nodes without any fixed device or a central coordination. They work in an open net and their collaboration is the sole means to allow communications and the survival of the MANET itself. A critical issue is to assess the behaviour of the nodes that...
In wireless ad hoc networks, autonomous nodes are reluctant to forward others' packets because of the nodes' limited energy. However, such selfishness and noncooperation deteriorate both the system efficiency and nodes' performances. Moreover, the distributed nodes with only local information may not know the cooperation point, even if they are willing to cooperate. Hence, it is crucial to design...
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