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In this paper we investigate the search path when building a wireless mesh network under extended ad-hoc network, and we propose a search method that can reduce power consumption. The route search part and the node part - which can be a mobile PC or a mobile phone, etc. -are combined in the proposed method. Moreover, we aim at improving the efficiency of the communication between nodes under the extended...
The following topics are dealt with: user behavior; intention aware computing; Internet LAN based RFID; intrusion detection system; document analysis; Web service; search engine; machine learning; neural network; collaborative communication; virtualized server; collaborative learning; video summary; computer simulation; fingerprint image matching; data analysis; Bayesian network; text visualization;...
Routing delivery is one of the key techniques in mobile ad hoc network, which involves many aspects such as topology update, routing exchange and so on. In this paper, we firstly apply routing tree to describe the complete topology of ad hoc network, and then store the information of routing tree into every node's routing table. Sparse routing tree, as a pruned tree, is used to exchange topology information,...
The recent interest in Wireless Sensor Networks has led to a number of clustering algorithms that use the limited energy available at sensors more efficiently. In this article, we present a heritable clustering algorithm based on HEED for low energy wireless sensor network. It brings in appointment mechanism to reduce the cluster head reelect overhead efficiently. In the cluster, TDMA communication...
Wireless Sensor Networks(WSN) is a hot spot of the research of wireless networks currently, the key of achieving efficient transmission business is to control node energy and improve the network lifetime in wireless sensor networks. The paper first uses Boolean sensing model based on Poisson point process to identify the function of the rate of coverage and the node density in unit area, and then...
Based on the analysis of the existing utility-based forwarding mechanisms, for the inefficient forwarding of history encounter time based forwarding mechanism in the initial phase of the node movement, a Random and Encounter Time Based algorithm named RET is proposed in this paper. RET divides the nodes moving into two phases-random forwarding phase (initial phase) and utility-based forwarding phase...
The proposed model in this paper is the intrusion detection techniques for mobile ad-hoc networks, which use collaborative efforts of nodes in a neighborhood to detect a malicious node in that neighborhood. The technique is designed for detection of malicious nodes in a neighborhood of nodes in which each pair of nodes in the neighborhood are within radio range of each other. Such a neighborhood of...
Mobile ad hoc networks are becoming an important concept of modern communication technologies and services. It provides some advantages to this communication world such as self-organizing and decentralization. In this paper, we are going to design a cluster-based multi source multicast routing protocol with new cluster head election, path construction and maintenance techniques. The main objective...
Ultra-Wide Band (UWB) wireless communication is a promising spread-spectrum technology with features of low cost, low power and high time resolution has potentially important applications in wireless ad hoc networks. This paper presents a novel quality of service (QoS) routing scheme for wireless multimedia ad hoc networks. Besides applying neighbor detection method in route discovery procedure, the...
Even though Intrusion Detection Systems (IDS) are in wide-spread use, the question of how to efficiently initiate responses to detected attacks has been discussed far less often, especially in highly dynamic scenarios such as tactical MANETs. Despite being flexible and robust in their ability to self-organize, these MANETS are distinctly more susceptible to attacks than their wired counterparts. Especially...
The majority of routing protocols for wireless sensor networks attempt to obtain optimal or shortest paths that lead to target resources. It is energy inefficient to search and establish those paths. CZQueen, a Small World-based resource query mechanism, is presented to reduce energy overhead of resource queries in large-scale and location-free sensor networks. Based on the Small World Model, CZQueen...
In this paper, we present a novel rateless code which outperforms LT-code, since it is adapted for network coding. To reduce the delay incurred at the intermediate nodes because of decoding and re-encoding, we design and analyze a novel degree distribution which we call Switched Distribution. This distribution increases the delivery ratio at the decoder even when few encoded symbols are received....
Contention-based forwarding (CBF) has proven to achieve a good performance in routing in mobile and vehicular ad hoc networks. CBF's main advantage is that it does not require the knowledge about the local neighborhood, eliminating, therefore, the periodic beacon exchange that causes degradation in the network performance, especially when the density of the neighborhood is high. On the other hand,...
Video streaming over wireless connections remains a challenge today: even when data link and transport layer protocols are tuned to avoid retransmissions and thus reduce the delay and the used bandwidth, the impact on the perceived video quality of imperfect and band-limited radio channels is not negligible. This phenomenon is even more pronounced in multi-hop ad-hoc networks, where the received video...
To enable the evolving trend of ubiquitous computing and multi-service support of next generation ad hoc and sensor networks this paper proposes a new concept of static and dynamic application-based heterogeneity and introduces STEPS; a mathematically-based distributed multi-rate storage and data management mechanism that dynamically responds to the stochastic temporal networks' disconnectivity pattern...
The border region monitoring task can be achieved using surveillance wireless sensor networks. The network detects trespassers and inform the sink node. There are many mobility models proposed for users within an ad hoc network. On the other hand, the behavior of trespassers are generally different than mobile users and does not follow a random pattern. Observations from previous security related...
Cooperative communications achieve tremendous improvements in system performance. Meanwhile, it tends to change the conventional access and transmission schemes in wireless networks. Thus, CoopMAC is proposed and analyzed for fully connected WLANs. It improves the performance of the network dramatically by enabling additional collaboration from other nodes. However, how does it work in multi-hop Ad...
MCN-MR (Multi-hop Cellular Network - Mobile Relay) has been proposed as a promising technology for future Beyond 3G and 4G systems due to its foreseen capacity to increase transmission rates and provide homogeneous quality of service levels in the service area. To this aim, mobile nodes are required to cooperate in the relaying of information of other nodes. As a result, selfish nodes refusing to...
A managed wireless mesh for infrastructure-level, stable regional mesh network has been studied. NerveNet, which we have been proposing, is a concept of future regional platform network that covers local regions and provides various context-aware services with the shared use of sensors and actuators. The managed wireless mesh developed for materializing NerveNet features auto-configuration of multiple,...
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