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One of the most important issues in sensor enabled emergency applications is the QoS provisioning. Wireless LANs plays critical role in providing anywhere and anytime connectivity for many sensor enabled emergency applications. This paper addresses the issue of provisioning QoS over the wireless channel between the sensor enabled emergency application and the wireless access points (e.g., wireless...
In this paper, we present a framework that improves the reliability and reduce the power consumption of a wireless ad hoc network through the deployment of supplementary nodes called agents. Agents are stationary nodes that have less stringent power constraints than the battery-operated mobile nodes. Placed in a mesh-like formation, agents enhance the connectivity of an ad hoc network by reducing...
Quality-of-service in ad hoc networks is becoming more important with progress of the ad hoc networking research and development. In this paper, we proposed a new routing protocol named RSR for ad hoc networks. RSR is one type of redundant dispersity routing protocol. Through the judicious use of packet replication in RSR, the performance of network applications in ad hoc network is significantly...
To facilitate the multi-hop communications in mobile ad hoc networks, all the nodes in the networks need to cooperate and relay packets for other nodes. Unfortunately, there exist selfish nodes that may refuse to relay packets for others in order to save their own resources such as energy. Those non-cooperative behaviors will lower down the network performance significantly. Therefore, schemes need...
In a wireless sensor network, a sensor measures environmental data. It also relays data for other sensors. While sensing workload is the same among sensors, relaying workload differs. Sensors closer to the data sink carry more data traffic. This becomes more prominent as the network scales up. The drawback of this is that nodes in the network degrade unevenly and the network ages in a non-uniform...
When a service is offered by multiple servers in a mobile ad hoc network (MANETs), the manner in which clients and servers are paired together, referred to as service selection, is crucial to network performance. Good service selection groups clients with nearby servers, localizing communication, which in turn reduces inter-node interference and allows for multiple concurrent transmissions in different...
Mobile optical free space networks are an emerging architecture that can provide high speed connectivity between a ground-based backbone network and mobile users in challenging environments. In such a network traffic could be relayed by airborne or ground routers using wireless optical links. The variable nature of the wireless optical channel complicates support for real-time distributed applications...
A typical task in a wireless sensor network is that every sensor node senses its local environment and, upon request, sends the data of interest back to a base station. Based on this many-to-one communication pattern, we first propose a distributed N-to-1 multipath discovery protocol which distinguishes from other multipath routing protocols in that it is able to find multiple node-disjoint paths...
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