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A common characteristic of all popular multi-path routing algorithms in mobile ad-hoc networks, such as AOMDV, is that the end to end delay is reduced by utilization of parallel paths. The competition between the neighboring nodes for obtaining a common channel in those parallel paths is the reason for end to end delay increment. In fact, due to medium access mechanism in wireless networks, such as...
Trust establishment in wireless ad hoc networks is a challenge because of its unique characteristics. These include the lack of a central authority and the autonomous, dynamic nature of these networks which result in poor connectivity and routing failure. Security can be provided by a certificate based model but key management is a difficulty in wireless ad hoc networks. A key management scheme is...
Due to the high overhead characteristics of wireless mesh network, the call capacity of VoIP is dramatically degraded. In the paper, the Aggregation Aware Routing with Path Separation (AAR-PS) protocol has been proposed. The protocol are designed by combining and engineering several techniques: packet aggregation, multi-path routing and event-triggered rerouting. The experiment results reveal that...
Opportunistic networks represent one of the most interesting evolution of MANET paradigm. Generally speaking, opportunistic networks enable user communication in environments where disconnection and reconnection are likely and link performance is extremely non stationary. In this paper, we propose a routing protocol, based on the opportunistic routing paradigm, able to assure connectivity in ad hoc...
Delay-tolerant networks (DTN) have the capacity to interconnect devices in roomy regions unlike traditional networks. Based on common sense, the more similar the mobility pattern of nodes, the more stable their relative positions, which results in a connection between them with a longer duration In this paper, a novel routing scheme using the similarity degree of mobility pattern is proposed to optimize...
A vehicular network is a promising application of mobile ad hoc networks. In this paper, we introduce a near-optimal broadcast technique, called CB-S (Cell Broadcast for Streets), for vehicular networks. In this environment, the road network is fragmented into cells such that nodes in a cell can communicate with any node within a two cell distance. Each mobile node is equipped with a GPS (Global Positioning...
In this study, an improved cover angle-based broadcasting algorithms is proposed for mobile ad hoc networks (MANETs) to minimize redundancy, contention and collision known as broadcast storm problem in the literature. The propose technique uses only cover angle concept for rebroadcast decision without using neighbors knowledge informationpsilas or complex calculations. Through the analyses and extensive...
We study the behaviour of packet delays and inter-forwarding times in vehicular networks utilizing opportunistic communication protocols. Our results are obtained through an extensive simulation campaign employing realistic models of vehicular mobility and scenarios derived from real urban environments. We also explore the impact of different forwarding strategies and traffic types on the results...
In this paper, we outline a framework for achieving high data rate connectivity in a multi-hop vehicular network. The data streams are sent to the receiver on the highest data rate path from the source vehicles. The method does not rely upon a location service for obtaining position information. Moreover, as the source and the receivers move from one position to the other, the paths are recomputed...
A Mobile Ad Hoc Network (MANET) is a dynamic wireless network that can be formed without the need for any pre-existing infrastructure in which each node can act as a router. In MANET, the high mobility of mobile nodes is a major reason for link failures. In This paper we propose a novel weight-based approach for routing algorithm in mobile ad hoc networks, called weight-based AODV (WBAODV). The proposed...
Mobile ad hoc networks are a type of mobile network that functions without any fixed infrastructure. Routing protocols are vital for the proper functioning of ad hoc networks. In the present routing protocols, data is transmitted after choosing shortest path without any consideration of any particular node's traffic which raises the problem of delay of transmission and unbalanced energy consumption...
Routing is the main research issue in the development of wireless mesh networks (WMNs). Many of the routing approaches have been borrowed from mobile ad hoc networks (MANETs) to achieve routing solutions in WMNs but are not ideal or optimal and do not utilize the characteristics of WMNs to their benefits. In this paper, we propose an improved hierarchical AODV routing protocol (IH-AODV), which exhibits...
This paper presents evaluation and comparison of the CBR performance in different mobile scenarios generated by Random Waypoint (RW) model. To our knowledge, CBR performance in RW mobility is discussed. The impact of AODV and DSDV routing protocols on the CBR delay and drop rate performance is also discussed. Extensive simulation results and analysis showed that CBR has better performance over AODV...
The most important issue in ad hoc wireless networks is the energy. So there are a lot of research points go to the direction of energy constrained routing protocols in ad hoc wireless network. Where it is very important to examine the routing protocol to make sure it is increase the network life time. This paper introduces a brief overview about the work in this area. Also it proposes a new protocol...
In this paper, we propose a new routing protocol named micro sensor routing protocol (MSRP) in IPv6 wireless sensor network. MSRP is implemented in network layer and can simplify significantly routing mechanism. Also, we simplify the routing message and remove source and destination nodes' sequence numbers and reduce route request (RREQ) ID length. Route reply (RREP) is created only by the destination...
Routing in delay tolerant networks (DTNs) is a challenging problem in networking research. Existing DTN routing solutions have used many approaches to increase the success rate of message delivery, such as meeting probabilities between nodes, packet replication and flooding. One important feature of these protocols is using local connection information to find the ldquobestrdquo path with high likelihood...
Wireless mesh networks (WMN); have been attracting an increasingly intensive research over the last few years. WMNs consist of end clients and mesh routers, communicate wirelessly in a multi-hop fashion. The commonly used routing protocols depend on the hop-count metric to determine the preferred route between source and destination. Due to the unpredictable behavior of the wireless medium, the need...
Modern battlefields represent complex network scenarios that include different networking domains, which need to communicate. These domains include different military entities,such as various allies armies, forces of the same army, mobile objects, for example tanks, vehicles, soldiers, flying vehicles, etc., that need to communicate quickly and will minimum of overhead, in order to accomplish their...
In this paper, we propose a new routing protocol for ad hoc wireless networks, which is based on DSR (Dynamic Source Routing) on-demand routing protocol. Congestion is main reason for packet loss in mobile ad hoc networks. If the workload is distributed among the nodes in the system based on the delay of the paths, the average execution time can be minimized and the lifetime of the nodes can be maximized...
The high-level contribution of this paper is a simulation-based detailed performance comparison of three different classes of on-demand routing protocols for mobile ad hoc networks: stability-based routing, power-aware routing and load-balanced routing. We choose the flow-oriented routing protocol (FORP), min-max battery cost routing (MMBCR) and the traffic interference based load balancing routing...
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