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A critical challenge for mobile ad hoc networks is the design of efficient routing protocols that are able to provide high bandwidth utilization and desired fairness in mobile wireless environment without any fixed communication establishments. While extensive efforts have already been devoted to providing optimization based, distributed congestion elusion schemes for efficient bandwidth utilization...
The growth of laptops, personal digital assistant (PDA) and 802.11/Wi-Fi wireless networking have made mobile ad-hoc network (MANET) a popular research topic recently. Due to the flexible deployment nature and the lack of fixed infrastructure, MANETs suffer from varieties of security attacks. In this paper, we propose the misleading routing attack (MIRA), which is different from the well known gray/black...
Disruption-tolerant networks (DTNs) have gained great attractions recently by addressing intermittent network connectivity suffered due to short radio transmission range, high node mobility, sporadic node densities, etc. Data communication across DTN is achieved over store-carry-forward (SCF) paradigm by exploiting temporary wireless links and connections opportunistically arising from mobility nature...
A Mobile Ad hoc Network (MANETs) is a group of wireless mobile terminals, which cooperate together by routing packets to each other on a temporary network. MANETs are attracting attention for their potential use in several fields such as collaborative computing and communications in indoor and outdoor environments. Considering mobility of the terminals, routing is a key process for operation of MANETs...
This research aims to improve the quality of MPEG-4 video transmission over MANET using cross layer paradigm that transfer the MPEG-4 video priority information from application to medium access control (MAC) layer. This information is used by proposed adopting dynamic mapping algorithm (ADMA) along with other information as access category (AC) congestion from MAC and hop count to destination from...
This paper will present an enhanced Dynamic Source Routing (DSR) routing protocol where it utilizes the IPv6 Flow Label to provide Quality-of-Service (QoS) to the real time applications in IPv6 wireless ad hoc networks. Conventional DSR routing protocol is enhanced to induce better QoS in dynamic nature ad hoc networks. Internet Engineering Task Force (IETF) presented Flow Label with 20 bits in the...
Node movement feature of Vehicular ad hoc network (VANET) closely resembles with that of mobile ad hoc network (MANET) but its high speed mobility and unpredictable movement characteristics are the key contrasting feature from that of MANET. The similarity nature suggests that the prevailing routing protocol of MANET is very much applicable to VANET. However, on the same line, the dissimilarity characteristics...
Because of the popularity of smart mobile devices with the capabilities to capture location information by using global positioning system (GPS), numerous novel geographical applications and services have been introduced. Among these applications, geocast service has recently gained a lot of attractions, since it has great potential to achieve multicast-like geo-applications such as location-based...
Nowadays, a new paradigm is emerging: the challenging integration of Peer-to-Peer into mobile Ad hoc networks (MANETs). In this context, this paper proposes a new distributed lookup protocol for mobile P2P networks. Its main objective is to reduce the overhead traffic and the lookup delay. Simulation results indicate that the proposed scheme has an improved performance in comparison with the popularly...
Supporting high mobility is essential to mobile ad hoc networks in a wide range of emerging applications such as vehicular networks. Communication links of an established communication path that extends between source and destination nodes are often broken under a high mobility environment. Although a new communication route can be established when a break in the communication path occurs, repeatedly...
To face QoS constraints of multimedia applications, many researches focus on improving the standard MANET routing protocols. Nevertheless, only few works relating to the comparison of enhanced heuristics are available. In those literature, the comparison parameters are measured through simulations performed mainly under unrealistic conditions. In this paper, we compare BER-based enhancements of AODV...
Broadcasting is an inevitable operation of route discovery in Mobile Adhoc Network (MANET). Though the broadcast by flooding is simple but inefficient and results in redundant message relays. This in turn over use limited network resources like channel bandwidth and node energy. The alleviated broadcasting with energy saving technique is necessary for the efficient route discovery and to improve network...
With the great development of multimedia applications, providing QoS guarantee for Ad Hoc networks is very important. This paper researches on cross layer QoS model in mobile Ad Hoc network, and proposes a cross layer QoS design model for mobile Ad Hoc networks. Based on considering path end-to- end communication delay, path usable degree (PUD), hops and throughput ratio, the required bandwidth of...
Mobile Ad hoc Networks (MANET) are wireless networks consisting of a collection of mobile nodes with no fixed infrastructure. Energy is a limiting factor in the successful deployment of ad hoc networks since nodes are expected to have little potential for recharging their batteries. Communication in ad hoc networks necessarily drains the batteries of the participating nodes, and eventually results...
In this paper, an improved hybrid location-based Ad hoc routing protocol (IHLAR) has been proposed. This hybrid approach combines geographic routing with topology-based routing protocol. It overcomes the major problems of reactive routing and the end-to-end delay is reduced by this algorithm. In addition, the path length performance of geographic routing is also improved. Simulation results show that...
Looking for usable gateway is a process, which brings the biggest overhead, in MANET accessing Internet. For controlling the routing overhead effectively, a gateway discovery method for MANET accessing Internet based on overhead control, which is according to the similar between ant searching path and mobile node searching gateway, is proposed in this paper. By simulating the pheromone's update process...
This paper proposes a cross-layer adaptive cooperative MAC protocol (CAC-MAC) based on IEEE 802.11 DCF, which forms a complete Application-MAC-PHY layer framework. The main feature of CAC-MAC protocol is an adaptive selection of data transmission scheme according to packet length and instantaneous wireless channel conditions. Simulation results show that the novel protocol significantly improves the...
A mobile ad hoc network (MANET) is a set of wireless mobile nodes that can communicate with each other without using any fixed infrastructure. It is also necessary for MANET devices to communicate in a seamless manner. There are multiple routing protocols that have been developed for MANETs. There is a need to support real time and multimedia applications in MANETs as they gain popularity. MANETs...
A Mobile Ad hoc Network (MANETs) is a group of wireless mobile terminals, which cooperate together by routing packets to each other on a temporary network. MANETs are attracting attention for their potential use in several fields such as collaborative computing and communications in indoor areas. Considering mobility of the terminals, routing is a key process for operation of MANETs. In this paper,...
Mobile Ad hoc network (MANET) is a multi-hops wireless network without fixed infrastructure. Now how to evaluate network survivability performance is the key work of the research of MNAET. According to the requirement of the survivability of MANET, a more comprehensive hierarchical model for quantitative evaluation of survivability is proposed. The model was constructed based on continuous time Markov...
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