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We develop distributed algorithms to allocate resources in multi-hop wireless networks so as to minimize the total cost. In order to observe the fundamental duplexing constraint, we first devise a spectrum allocation scheme that divides the whole spectrum into multiple sub-bands and activates conflict- free links on each sub-band. We show that the minimum number of required sub-bands grows asymptotically...
The following topics are dealt with: VLSI; OFDM; embedded systems; filters; MIMO; cellular and integrated systems; media processing; Internet; image processing; network routing; QoS and resource allocation; network management; channel modelling and equalization; ad hoc networks; communication signal processing; WSN; channel estimation; WLAN and WWAN; coding and detection; security; UWB; cognitive...
In wireless sensor networks where nodes operate on limited battery energy, some other unique characteristics make these nodes impossible to be replaced or recharged, so the efficient utilization of the energy is very important. There are many papers proposed in order to reduce energy consumption, but at the same time another problem emerged, i.e., for each node with limited energy the cumulative load...
The ability to provide reliable in-network storage while balancing the energy consumption of individual sensors is a primary concern when deploying a sensor network. The main concern with data-centric storage in sensor networks is the ability to provide reliable and load balanced storage. Energy and wireless range constraints make centralized approaches for storage impractical, and in-network data-centric...
One of the key design goals in the design of wireless sensor networks is the efficient utilization of scarce resources such as bandwidth and energy supply. Data aggregation is a powerful technique to reduce the volume of traffic carried by the network. Data aggregation reduces congesting, saves bandwidth, saves energy and improves the lifetime of the network. In this paper we study the integrated...
Wireless Sensor Networks (WSNs) monitors changes in the operational environment and collaborate to actuate distributed tasks in dynamic uncertain and hostile environments. The biggest constraint of these networks is short life time. In this context, various schemes have been presented in order to improve the life time of these networks and to overcome the energy constraint. This paper presents a new...
The following topics are dealt with: ad hoc network routing; wireless sensor network security; medium access control; scheduling; resource sharing; MIMO; diversity; power control.
The following topics are dealt with: autonomous decentralized systems; service composition; service collaboration; testing and online validation; transportation; sensor and ad hoc networks; assurance and fault-tolerance; agent systems and networking; resource abstraction and management; security, safety, and trust; automotive telematics; multimedia content and service provisioning; context-awareness;...
In this paper, we study multi-hop wireless networks with general interference models, and describe a practical randomized routing-scheduling-congestion-control mechanism that is guaranteed to fully utilize the network capacity, and achieve fair allocation of the resources. Using the framework described in this paper, low complexity distributed algorithms can be developed for a large class of interference...
Existing hierarchical routing algorithms for wireless sensor networks (WSNs) mainly focus on distributing energy load among all nodes. They pay little attention to quality of services (QoS) support in WSNs. In this paper, we developed an algorithm, local-centralized adaptive clustering algorithm (LAC), which concerns not only energy consumption but also the reliability and the steadiness of the wireless...
A wireless sensor network is constrained by computation capability, memory space, communication bandwidth, and above all, energy supply. When a critical event triggers a surge of data generated by the sensors, congestion may occur as data packets converge toward a sink. Congestion causes energy waste, throughput reduction, and information loss. However, the important problem of congestion avoidance...
This work develops a resource management strategy for a wireless sensor network of bearings-only sensors. Specifically, the resource manager determines which nodes actively sense and communicate during each snapshot in order to achieve a tolerable level of geolocalization accuracy while attempting to maximize the effective lifetime of the network. Unlike other methods that use the total energy consumed...
The following topics are dealt with: flow control; flow analysis; system architecture; network systems; distributed multimedia 3D applications; Internet; pervasive computing; mobile computing; embedded systems; protocols; routing; search; allocation; verification; access control; work flow; P2P; QoS; VOIP; ontologies; data mining; IPv6; ad hoc networks; and sensor networks
Multihop message routing is a well studied and widely documented area of research in wireless sensor networks (WSN), where the dynamic and lossy nature of the wireless medium and severe resource constraints pose major challenges. The vast majority of related research focuses on reliable and power-efficient transfer of small amounts of data, such as low frequency sensor readings or event detections...
The following topics were dealt with: local computer networks; peer-to-peer; QoS; wireless sensor networks; radio networks; storage; distribution; traffic characterisation; network routing; optical networks; services; traffic control; power efficiency; wireless local area networks; network security; ad hoc networks; multicast networks; network management; DiffServ; mobile networks; resource allocation;...
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