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Adaptive distance vector routing algorithm (ADV) is a distance vector routing algorithm that exhibits some on-demand characteristics by varying the frequency and the size of the routing updates in response to the network load and mobility conditions. Using simulations we show that ADV outperforms AODV especially in high mobility cases by giving significantly higher (50% or more) peak throughput's...
In a mobile ad-hoc network (MANET), node mobility has a significant impact on the performance of routing protocols. Most of the previous research has been focused on entity mobility models, i.e., movements of the mobile nodes are independent of each other. In this paper, we investigate the impact of swarming behavior of mobile nodes, as observed in many mobile networks, on the performance of MANET...
At present mobile devices are prevalent with end users and continuous media streaming services in mobile ad-hoc networks (MANETs) support popular applications. One of the requirements for applications that stream isochronous media is that the network link has to be continuously available. In this study, we introduce two group-server scheduling schemes to improve link continuity: static group-server...
This paper investigates multi join queries in ad hoc wireless networks. A two-phase query optimization method is presented, which optimizes a query with two phases. First, it optimizes middle result of a query and produces optimal join sequence, which makes account of transmission data minimum. Second, the join tree from first phase is separated into several sub queries and distributed to the corresponding...
Abstract-Recently, popularity of multimedia content sharing among the Internet users and development of wireless mobile devices have promoted a trend of deploying Peer-to-Peer (P2P) networks over mobile ad hoc networks (MANETs) for mobile content distribution. However, due to limited radio transmission range, sporadic node densities and power limitations, MANETs may become intermittently connected...
Several protocols have been proposed to improve data accessibility in MANETs. Some of these proposals have adopted the cooperative caching scheme, allowing multiple mobile hosts within a neighborhood to cache and share data items in their local caches. Cross-layer optimization has not been fully exploited to further improve the performance of cooperative caching in these proposals. In this paper,...
In this paper, we present a solution of dynamic Ad-Hoc gateway to meet the urgent needs of interconnecting MANET to Internet. Comparing with the common fixed gateways, we integrate AODV with Mobile IP, eliminate the broadcast of Mobile IP by carrying the information in existing AODV messages so improve the performance remarkably. In this paper, we give the system's architecture design and its functional...
This paper we presented the design objectives and technical challenges for effective MAC protocols in MANET. Complex environments in ad hoc networks require a joint control of physical (PHY) and medium access control (MAC) layers resources in order to optimize performance. We discuss the benefits of cross-layer frame and give a multichannel MAC approach.
In this paper, we modify OLSR for MANET nodes to achieve full connection to Internet through multiple mobile gateways. We present a proactive mobile IP approach using Hello message and TC message to maintain the MANET nodes movement. The mobile gateway multiple metrics selection algorithm can select the best one among the active multiple mobile gateways. The simulation result shows that our approach...
Packet scheduling has been a very popular paradigm to ensure maximum throughput and bounded delay access for packet flows. This work proposes packet scheduling approach to QOS provisioning in multihop wireless networks. Our scheduling mechanism achieves fair and maximum allocation of the shared wireless channel bandwidth for MANET's that consist of General nodes and Backbone nodes. Backbone nodes...
Reactive routing protocol (such as DSR) is preferred in Ad Hoc networks. In DSR protocol, the relay node would search its cache for an alternate route to the destination to salvage packets when link failed and would abandon the packets if not found. This paper introduced a novel routing algorithm based on the downstream nodes' information called DSR-DI. If the alternate route to destination was not...
The prediction of performance in Manet (mobile ad-hoc network) used to improve the technology development. The proposed analysis used how to design a network according to the applications of mobile adhoc network experiments with different workloads. This paper shows the variations of any parameter must affect the performance of mobile adhoc network. The average end-to-end delay, throughput and average...
Service discovery is an essential protocol in mobile ad-hoc networks as it is used to search for available services. It is becoming an important issue because of node mobility and requirements of low number of messages. This paper proposes a service discovery scheme which combines cooperative service information spreading of adjacent nodes and the higher degree-based search protocol in mobile ad-hoc...
Vehicles equipped with wireless communication devices are poised to deliver vital services in the form of safety alerts, traffic congestion probing and on-road commercial applications. The selection of the most realistic and the most easy-to-implement mobility model is very crucial for the validity and feasibility of research. It is described several mobility models that represent mobile nodes whose...
Mobile adhoc networks (MANETs) are good candidate for peer-to-peer (P2P) overlay architectures. In both, nodes work independently and are distributed in nature. P2P overlays are mostly built over traditional underlying IP network like Internet. There are two flavors of it; unstructured P2P such as Gnutella and structured P2P such as Chord. In this paper, we explain and evaluate Gnutella and Chord...
Inter-domain routing for MANETs (mobile ad hoc networks) draws increasing attention because of military and vehicular applications. The existing border gateway protocol (BGP) is the de facto inter-domain routing protocol for the Internet. But BGP is not applicable to MANETs because the BGP design is based on a static Internet which does not support dynamic discovery of members, and cannot scale to...
In framework for integrating Internet and MANET, because the equipments in the networks are fixed, there is no need to consider the problem of energy. In MANET (mobile ad hoc network), the energy of the mobile nodes will affect the life time and the performance of the network, so it must consider the load and energy of a node. This paper proposes a new routing method called Load balancing and asymmetrical...
This paper describes a cooperative MANET protocol dedicated to intelligent transportation systems and its new experiment results in mobile scenarios. The protocol is named CIVIC (Communication Inter Veacutehicule Intelligente et Coopeacuterative). It is an auto-configuration inter-vehicle communication protocol, which supports ad-hoc and infrastructure networks, contains reactive and proactive routing...
Clustering is a vital technique widely used in MANETS. The clustering technique guarantees performance by increasing the stability and throughput of the network. The clustering technique divides the network into group of mobile nodes as clusters. A clustering protocol is proposed that employs a powerful analytical hierarchy process methodology, a mathematical model to compute relative weights for...
The present work focuses on emulation and validation of protocol stacks for MANETs (mobile ad-hoc networks) that must support multimedia applications in a tactical environment. We considered a network consisting of some tens of mobile nodes, with randomly variable speeds in the order of some tens of km/h. Nodes are deployed on a scenario of a few km2 and have a radio range of some hundreds of meters...
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