Implementing distributed applications in mobile ad-hoc networks is a challenge because of low bandwidth, small transmission range, unpredictable topology changes and the need to conserve energy in low powered devices. This paper presents a distributed auction system using a large scale adhoc network as its sole communication platform. The auction system is built on top of a basic middleware ser...

The functioning of an ad hoc network is based on the supportive contributions of all of its members. Nodes behave as routers and take part in route discovery and maintenance. In this paper, a forwarding protocol is presented that stimulates node cooperation to improve the throughput of the network. The incentive mechanism is provided through a micropayment protocol that deals with the cooperati...

Some ad hoc protocols allow the discovery and/or storage of multiple routes to the same destination node. The selection of the path to utilize is commonly based on the criterion of the minimum number of hops. However, other strategies could be more appropriate to improve the network performance. In this sense, this paper proposes the criterion based on the estimation of the Mean Residual Path L...

This document investigates the joint spatial correlation property of the shadowing process for peer-to-peer radio links (mobile-to-mobile) in urban environments. A sum-of-sinusoids (SOS) based simulation model is proposed to generate the joint correlation shadowing process for system level simulations involving mobile multihop relay/ad-hoc networks. Purpose For approval and submission to IEEE 8...

An ad hoc network is a collection of wireless mobile nodes that form a network without existing infrastructure or centralized administration. Nodes in the network cooperate to forward packets for each other, to allow mobile nodes not within direct wireless transmission range of each other to communicate. Ad hoc networks were initially studied for military applications more than 20 years ago, an...

The goal of the GecGo middleware is to provide all the services required by self-organizing distributed applications running on multihop ad-hoc networks. Because of the frequent as well as unreliable and anonymous communication between accidental neighbors observed in these networks, applications have to adapt continuously to changes in the mobile environment and the middleware offers the requi...

In this paper we explore the hypothesis of an “ad hoc horizon” for wireless multihop networks. This horizon is defined in terms of number of nodes and number of hops beyond which TCP based network services are not useful anymore. We show that with IEEE 802.11 this horizon is as narrow as 2 to 3 hops and approximately 15 nodes. Our results are obtained through simulations by choosing optimal set...

Shared channel, multihop wireless ad hoc network has some unique characteristics that make the fair scheduling in such environment challenging. In this paper we propose a new QoS-aware fair queueing model for ad hoc networks. Our proposed algorithm ensures a distributed coordination of fair channel access while maximize the throughput using spatial reuse of bandwidth. We consider the presence o...

We propose a complete design for a scope limited, multihop broadcast middleware, which is adapted to the variability of the ad-hoc environment and works in unlimited ad-hoc networks such as a crowd in a city, or car passengers in a busy highway system. We address practical problems posed by: the impossibility to set the TTL correctly at all times, the poor performance of multiple access protoco...