We consider the problem of adjusting the transmit powers of nodes in a multihop wireless network (also called an ad hoc network) to create a desired topology. We formulate it as a constrained optimization problem with two constraints connectivity and biconnectivity, and one optimization objective maximum power used. We present two centralized algorithms for use in static networks, and prove the...

We consider the problem of adjusting the trans mit powers of nodes in a multihop wireless network also called an ad hoc network to create a desired topology We formulate it as a constrained optimization problem with two constraints connectivity and biconnectivity and one op timization objective maximum power used We present two centralized algorithms for use in static networks and prove their o...

Barrage relays networks (BRNs) are mobile ad hoc networks based on an autonomous cooperative communication scheme that eliminates the need for link-based coordination between nodes (e.g., collision avoidance and routing). BRNs are therefore based on a physical layer resource that is not a single link, but a region of cooperative, multi-hop transport fabric. Simultaneous unicast flows in BRNs ca...

AbstrucfThis paper describes a new protocol for the establishment of multihop ad hoc networks based on Bluetooth devices. The proposed solution is specification compatible, and achieves the following desirable properties, only a few of which are available in previous solutions. The protocol is executed at each node with no prior knowledge of the network topology, thus being fully distributed. T...

Due to the limited energy supplies of nodes, in many applications like wireless sensor networks energy-efficiency is crucial for extending the lifetime of these networks. We study the routing problem for multihop wireless ad hoc networks based on cooperative transmission. The source node wants to transmit messages to a single destination. Other nodes in the network may operate as relay nodes. I...

In this article, we present a novel theoretical framework suitable for analytical performance evaluation of a family of multihop broadcast protocols. The framework allows to derive several average performance metrics, including reliability, latency, and efficiency, and it is targeted to Vehicular Ad-hoc NETworks (VANETs) applications based on an underlying IEEE 802.11 protocol. It builds on the...

Abstract— The topology of wireless multihop ad hoc networks can be controlled by varying the transmission power of each node. We propose a simple distributed algorithm where each node makes local decisions about its transmission power and these local decisions collectively guarantee global connectivity. Specifically, based on the directional information, a node grows it transmission power until...

Wireless ad-hoc networks (MANETs) are autonomous, self-configuring and adaptive networks. Their ability to adapt themselves to dynamic, random and rapidly changing multihop topologies is given by a multihop routing protocol. In this paper, we describe experiments made with a real MANET consisting of 18 nodes implementing the OLSR routing protocol operating over radio with IEEE 802.11 hardware. ...

In a wireless sensor network, sensor nodes are deployed in an ad hoc fashion and they deliver data packets using multihop transmission. However, transmission failures occur frequently in the multihop transmission over wireless media. Thus, a loss recovery mechanism is required to provide end-to-end reliability. In addition, because the sensor nodes are very small devices and have insufficient r...

– We consider the problem of throughput modeling of multi-hop wireless networks with cellular overlay using simple forwarding strategies in the upstream. Considering the effect of shadowing and distance loss, we derive a closed-form formula for the probability density function of power and interference at each receiver and compare the numerical and simulation results for different path loss par...