This project is supported by DARPA NMS Grant: 8922385. Abstract-This paper presents a cross-layer feedback control scheme for video communications over unstructured mobile networks for tactical operations. A peer-to-peer mobile ad-hoc network has been considered for the experimental testbed. Since ad-hoc networks can suffer greatly from heavy packet loss, in a multihop transmission we have cons...

Studies of mobile ad-hoc networks are often based on simulation and their underlying, necessarily simplified assumptions of physical reality. In order to analyse the practical problems we built our own hardware and software. The hardware consists of a core Motorola controller and different wired and wireless interfaces like a Bluetooth and a 433/868 MHz RF module. It allows therefore analysing ...

Ad hoc networks, where mobile nodes communicate via multihop wireless links, facilitate network connectivity without the aid of any pre-existing networking infrastructure. The intrinsic attributes of ad hoc networks, such as dynamic network topology, limited battery supply, constrained wireless bandwidth and quality, and large number of heterogeneous nodes, make network management significantly...

A directional routing approach for multihop ad-hoc networks, is presented which has been applied to two on-demand routing protocols: namely dynamic source routing (DSR) and ad-hoc on-demand distance vector routing (AODV). Both DSR-based and AODV-based directional routing protocols are designed to balance the tradeoff between co-channel interferences from nodes hops away and the total power cons...

Ad hoc networks are characterized by multihop wireless connectivity, frequently changing network topology and the need for efficient dynamic routing protocols plays an important role. We compare the performance of two prominent on-demand routing protocols for mobile ad hoc networks: Dynamic Source Routing (DSR), Ad Hoc On-demand distance Vector Routing (AODV). A detailed simulation model with M...

1 This work is partly supported by the German Ministry of Education and Research under IPonAir Project Abstract : This paper describes the system design and implementation of a testbed, running at TSystems in Darmstadt. In this testbed the interworking between mobile wireless ad hoc networks (MANETs) and infrastructure based networks, based on the IPv6 protocol is investigated. This means, acce...

The contribution of this paper, is the integration of network mobility (NEMO) and ad hoc networking (MANET) approaches in realized heterogeneous environment. The experimented prototype system applies existing Mobility support for IPv6 (MIPv6), NEMO, Ad hoc On-demand Distance Vector (AODV) routing protocol, and IEEE 802.11b Wireless LAN (WLAN) technologies to enable end-toend connectivity of a m...

Mobile ad-hoc networks consist of mobile nodes interconnected by multihop path that has no fixed network infrastructure support. Due to the limited bandwidth and resource, and also the frequent changes in topologies, ad-hoc network should consider these features for the provision of security. We present a secure routing protocol based on identity-based signcryption scheme. Since the proposed pr...

Content centric network (CCN) is conceived as a good candidate for a futuristic Internet paradigm due to its simple and robust communication mechanism. By directly applying the CCN paradigm in wireless multihop mobile ad hoc networks, we experience various kind of issues such as packet flooding, data redundancy, packet collisions, and retransmissions etc., due to the broadcast nature of the wir...

Mobile Ad Hoc Networks (MANETs) are collections of mobile nodes that can communicate with one another using multihop wireless links. MANETs are often deployed in the environments, where there is no fixed infrastructure and centralized management. The nodes of mobile ad hoc networks are susceptible to compromise. In such a scenario, designing an efficient, trustworthy and secure routing protocol...