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The essence of spectrum allocation is to find an appropriate distribution of spectrum bands among users so that they can coexist. Thus, spectrum allocation can avoid interference that caused by two interference SUs using the same channel. Different spectrum allocation can lead to different network topologies and consequently have effect on the network connectivity. The aim of this paper is twofold:...
The applying of QPSO-FISH algorithm in the wireless senor network are mainly studied in this paper. Wireless sensor network is an energy-constrain network, coverage efficiency and power consumption are two important performance indicators. Maximizing the network coverage and minimizing the number of working nodes are network optimization goals. Establish an optimal model for coverage in wireless sensor...
CSCW in design maybe work in mobile ad hoc network and security of routing protocol in MANET is one key factor. The routing protocol for MANET uses cryptographic technology to heighten its security, which makes it possible to use formal method. Considered the property of routing protocol for MANET, the drawback of BAN logic is analyzed and the security is described based on improved BAN logic. The...
With the fast advance of wireless chip-set and portable devices, mobile ad-hoc network (MANET) is becoming a novel wireless computing environment that can embrace grid computing by utilizing the non-trivial computing capabilities of each node to solve time-critical or resource-critical problems. But a few issues such as intermittent network connectivity, node's heterogeneity and resource constraints,...
Strand space is often used to analyze the secure protocols. However, the protocol consistency conditions defined by strand space do not satisfy the characteristics of ad hoc routing protocol. Based on the characteristics of ad hoc mobile network, the thesis re-defines the consistency conditions for the normal operation of the protocol and at the same time adds intermediator credibility condition,...
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