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IEEE 802.11 proposed a number of standards and each one had a specific goal. They can be configured in infrastructure mode or ad hoc mode. In the study of infrastructure mode, the focus was on 802.11 b/g co-existence along with other single mode operations to analyze the throughput and traffic drop through simulation. In the study of ad hoc mode, the focus was to analyze the behavior of ad hoc networks...
In this paper, we propose a protocol for identifying node-disjoint paths in an ad hoc network. The core of a protocol is a scheme that forwards copies of a route request at an intermediate node. We propose schemes that are slotted and utilize the cross-layer properties of an ad hoc network. There can be a trade-off between the overheads incurred during the route discovery and the probability of identifying...
Wireless mesh networks (WMNs) are a type of radio-based network systems which require minimal configuration and infrastructure. One of the factors that influence the performance of WMNs is the underlying routing protocol used. Here, we propose one such routing protocol, called M-OLSR, which is a variant of OLSR, a traditional link-state protocol developed to meet the requirements of mobile adhoc networks...
Multimedia data communication in mobile ad hoc networks involves link un-stability and link-failures. So the existing design of routing protocols failed to achieve a stable QOS. In this paper, we developed an ant colony-based routing protocol for multimedia communications in mobile ad hoc networks. The routing protocol first establishes multiple paths between the source and destination of a data session...
In this paper, we purpose a new routing protocol based on applications of hierarchical routing protocols, named as ldquoMulti-Level Cluster-based Hierarchical Protocolrdquo (MLCP) for large-scale mobile ad hoc networks. Our approach organizes nodes into different levels of clusters. MLCP maintains a hierarchical topology, where elected cluster-heads at lower level do not participate to next cluster-head...
The performance of routing protocols in mobile ad hoc network (MANET) always attracts many attentions. As many previous works have shown, routing performance is greatly dependent to the availability and stability of wireless links. Although there are some studies reported to evaluate the performance of routing protocols in MANET, little work is done for the system overall performance, which is generally...
This paper proposes a neighborhood route diffusion (NRD) mechanism in which certain selected entries from a node's routing table are selectively diffused to its neighbor nodes. When done efficiently, this selective route diffusion can create a temporary envelope of emergency route information to a destination around all nodes that are actively forwarding packets to that specific destination. When...
One of the most important challenges in mobile ad hoc networks is to use an efficient and dynamic routing protocol, as the nodes can move randomly, which requires the routing protocol to respond quickly to the network topology change. In this paper, a new hybrid routing protocol, based on a reactive AODV routing, is introduced. It follows the proactive approach for some special nodes in some interval...
The next generation mobile communication systems will be based on Infrastructure wireless LAN technologies like cellular and ad hoc networks. Such hybrid networks benefit the extension of infrastructure network coverage using Ad Hoc connectivity apart from offering the ad hoc nodes access to the resources of the Wired/Infrastructure networks. In most of the integration strategies Mobile IP is integrated...
Mobile ad hoc networks are networks without fixed infrastructure. The mobile nodes perform both as a host and as a router by forwarding packets to other nodes. Because of the nature of ad hoc networks, there are special demands for ad hoc routing protocols and the performance of these routing protocols is an important issue. This paper presents a simulation based comparative performance analysis of...
The performance of AODV protocol of MANET at the rate of 4G is studied. A network frame is introduced, the network model is set up, and simulations are run in NS2. After analysis the results show that AODV is suitable for the network of low moving speed at the rate of 4G, but not suitable for the network with too high speed. The work has some value in the integration of MANETs and 4G mobile communication...
There are some papers on secure or anonymous routing protocol in mobile ad-hoc networks. However, due to their original design goal, most of them are vulnerable to attacks and inefficient. In fact, providing security and anonymity are critical in wireless ad hoc networks. In this paper, we present an efficient secure anonymous routing protocol for clustered mobile ad-hoc networks, which not only solves...
With the increasing interest in the application of wireless ad hoc networks, the demand for providing QoS in such applications also grows. Particularly, in sensor and actor networks, providing certain delay bounds is crucial for the actors as they perform their actions based on the received data from sensors. The usefulness of the content from sensors is based on its timeliness. In this paper, we...
In mobile communication environments, traditional routing protocols designed for static wireless sensor networks may fail to deliver data timely. The aim of this work is to identify improvements that can be obtained considering mobility and to recognize its research challenges. We briefly describe different levels of mobility in wireless sensor networks (WSNs) and highlight the efficiency of routing...
Trends in fourth generation (4G) wireless networks are clearly identified by the full-IP concept where all traffic (data, control, voice and video services,etc.) will be transported in IP packets. Many proposals are being made to enhance IP with the functionalities necessary to manage the mobility of nodes, so that networks can provide global seamless roaming between heterogeneous wireless and wired...
We study the problem of secure routing in wireless sensor networks where the sensors and the sink can move during the execution of remote monitoring applications and communication is not necessarily directed towards the sink. We present a new routing protocol that builds upon a collection of mechanisms so that the integrity and confidentiality of the information reported to the controlling authorities...
An ad hoc network is a group of mobile wireless nodes that cooperatively form a network among themselves without any fixed infrastructure. Most of these devices run on lithium-ion rechargeable batteries. These batteries have a lifetime of few hours of active lifetime. To improve this crucial factor, researcher tried to optimized power consumption in every aspect of mobile devices. Power consumption...
This paper proposes the performance evaluation and comparison of the main topology-based routing protocols commonly used in wireless ad hoc networks: DSDV, OLSR, AODV and DSR in a different environment such as wireless mesh network. It provides an overview of available solutions based on detailed simulation study. The performance comparison is done with regard to the network size, network load and...
In this paper an efficient on demand QoS based routing protocol is developed which considers end to end application requirement and energy efficiency together with the route discovery mechanism of DSR to set up QoS route. The proposed QoS aware protocol works as per the user request for a route. If a request comes for QoS route, based on some application requirement (available bandwidth, transmission...
An ad hoc network is an infrastructure less network formed by a collection of wireless mobile nodes that operate as hosts as well as routers in the network. Thus a dynamic and efficient routing protocol is central to the design of ad hoc networks. In this paper we compare the performance of ad hoc routing protocols like DSDV, AODV and DSR under scalable and mobile conditions. We also analyze the results...
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