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Multi-hop over-the-air reprogramming is essential for remote installation of software patches and upgrades in wireless sensor networks (WSNs). Several recent coding-based reprogramming protocols have been proposed to enable efficient code dissemination in high packet loss environments. An accurate and formal analysis of the performance of these protocols, however, has not been studied sufficiently...
Over-the-air reprogramming is a key service in wireless sensor networks. The service can disseminate a new code image to every sensor node in the network. For security reasons, every code image must be authenticated to prevent an attacker from installing its code to the network. In this paper, an authentication method named Hierarchical Hash Tree (HHT) is proposed to reduce the overheads of Sreluge,...
Multi-hop over-the-air reprogramming is essential for the remote installation of software patches and upgrades in wireless sensor networks (WSNs). Recently, coding-based reprogramming protocols are proposed to address efficient code dissemination in environments with high packet loss rate. The problem of analyzing the performance of these protocols, however, has not been explored in the literature...
Wireless multimedia sensor networks (WMSNs) are expected to find wide applicability in target tracking in the near future. This paper proposes a dynamic capacity multi-path routing protocol (DCM), based on improved Ford-Fulkerson algorithm, to solve the problem of data transmission from anchor nodes to base station (BS). By adjusting the parameter of flow capacity in max-flow model, a multi-path routing...
In this paper, we report on our experiment with the deployment of a virtual machine, Netquest, which evaluates protocols written in a declarative language, over iMote devices. Netquest offers a new programming model for sensor networks with a high level of abstraction. Protocols and applications can be written in a simple rule-based language, which allows concise and application centric programming...
To connect wireless sensor networks and WiMAX accessing system, a system is proposed in this paper. It is composed of two parts. The first part is used to establish a P2P network of multiple wireless sensor networks (WSNs) named as ??WSN Peer Group (WPG)??. This part is implemented by using JXTA platform. In the WPG, sensor informations can be shared peer to peer by sensor networks. The second part...
The energy consumed by topology maintenance could be higher than that in the initialization stage and the cost will increase steadily with the turns of maintenance process. Therefore, when design a self-organization protocol for WSN, not only initialization cost should be considered but also the maintenance cost in the whole lifetime. Moreover, to reduce the footprint on system resource, the maintenance...
Energy efficiency is a key problem of wireless sensor networks. Though we already have many self-organization protocols which can build energy-saving structures, the energy cost of maintenance also must be concerned. We found that organized network structure has great impact on the energy cost in the maintenance stage and the overall energy efficiency. In this paper, we classify the self-organization...
An important feature of the difference between wireless sensor networks and traditional wireless networks is that energy of sensor node is limited. Therefore, how to design energy efficient sensor network system has been the focus of the study in related fields. Now there are many self-organization protocols in wireless sensor networks, but most only take the initial energy consumption into account...
Network reprogramming is a crucial service in wireless sensor networks (WSNs) that relies on epidemic strategy for spreading software updates by just having a local view of the networks. Securing the process of network reprogramming is essential in some certain WSNs applications, state-of-the-art secure network reprogramming protocols for WSNs aim for the efficient source authentication and integrity...
Existing secure network reprogramming protocols for wireless sensor networks (WSNs) target the efficient authentication of code packets, but none of them provide the verification of control packets which are vulnerable to Denial of Service (DoS) attacks. In this paper, we propose the secure and DoS-resistant network reprogramming scheme based on CPK (Combined Public Key) that can verify control packets...
Cross-layer design has been proposed as a promising paradigm to tackle various problems of wireless communication systems. Recent research has led to a variety of protocols that rely on intensive interaction between different layers of the classical layered OSI protocol architecture. These protocols involve different layers and introduce new ideas how layers shall communicate and interact. In existing...
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