A n ad hoc wireless network is composed of mobile hosts without any wired infrastructure support. In mobile ad hoc networks, unicast and multicast routing protocols are faced with the challenge of producing multihop routes because of limited radio propagation range. In addilion, routing protocols must manage mobilily and be bandwidth and power efficient. The On-Demand Multicast Routing Protocol...

An ad hoc network is a multihop wireless communication network supporting mobile users without any existing infrastructure. To become commercially successful, the technology must allow networks to support many users. A complication is that addressing and routing in ad hoc networks does not scale up as easily as in the Internet. By introducing hierarchical addresses to ad hoc networks, we can ef...

This paper analyzes voice transmission capacity on ad hoc networks by performing simulations related to delay and jitter. We evaluate the influence of QoS provision and mobility on the number of voice transmitting sources. Results show that the maximum number of voice transmissions can be increased when medium access time is reduced by means of a service differentiation mechanism applied to the...

This paper describes an algorithm that achieves delay and throughput decoupling in distributed fair scheduling in multihop ad-hoc wireless networks. The solution allows to support both low-bandwidth, low-delay and high-bandwidth, high delay applications in a single framework, without wasting much bandwidth to realize the low-delay requirement. We demonstrate the effectiveness of our algorithm i...

In this paper we have proposed a secure routing protocol based on AODV for multihop ad hoc networks. Our protocol is unique in the sense that it is capable of finding a secure end-to-end route free of any malicious entity, thus resisting an internal attack within the network either in the form of compromised or disloyal nodes. We propose to find a secure and efficient route to a destination bas...

Congestion control is a key problem in mobile ad-hoc networks. The standard TCP congestion control mechanism is not able to handle the special properties of a shared wireless multihop channel well. In particular the frequent changes of the network topology and the shared nature of the wireless channel pose significant challenges. Many approaches have been proposed to overcome these difficulties...

This paper investigates on the problem of combining routing scheme and physical layer security in multihop wireless networks with cooperative diversity. We propose an ad-hoc natured hop-by-hop best secure relay selection in a multihop network with several relays and an eavesdropper at each hop which provides a safe routing scheme to transmit confidential message from transmitter to legitimate r...

Abstract— Multicast-based data communication is an efficient communication scheme especially in multihop ad hoc networks where the MAC layer is based on one-hop broadcast from one source to multiple receivers. In this paper, we address the problem of resource allocation for a set of homogeneous multicast sessions over multihop wireless networks. We propose an iterative algorithm that achieves t...

Ad-hoc localization in multihop setups is a vital component of numerous sensor network applications. Although considerable e ort has been invested in the development of multihop localization protocols, to the best of our knowledge the sensitivity of localization to its di erent parameters (network density, measurement error and beacon density) that are usually known prior to deployment has not ...

Cooperation among users in a multihop wireless network adds diversity to the system and thus it allows us to reduce the overall transmit power. However, cooperation requires signaling among users and this reduces the overall rate gain. In this work, we provide the optimal coding strategy for meshed wireless networks, where more links are active simultaneously, assuming as optimality criterion t...