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Route discovery and maintenance in Mobile Ad-hoc Network (MANET) is a problem of long standing interest. In ad-hoc networks the Ad-hoc on demand Distance Vector (AODV) protocol assumes that discovered route is optimal and transmits data on it for the entire data session, whereas due to dynamic topology nodes change position dynamically, the optimum route may change. Thus, node mobility may give rise...
Routing path restitution approach to control and tolerate the congestion in routing models for mobile ad hoc networks is proposed in this paper. Packet loss in network routing is primarily due to link failure and congestion. The majority of present congestion control solutions do not possess the ability to distinguish between packet loss due to link failure and packet loss due to congestion. Here...
With the rapid growth of wireless technologies and increasing number of mobile digital devices, mobility has been an important element on the Internet. NEMO Basic Support, designed by the Internet Engineering Task Force (IETF) to provide network mobility, is not efficient to offer low latency handoff in the case of nested mobile networks because it produces a long transfer delay and excessively large...
OSPF is one of the routing protocols which is the most widely used in internet and intranet today. The link-state algorithm in OSPF is based on the thought of local optimization, but in certain cases, routing algorithms based on local optimization might lead to a disadvantage which will remarkably depress global performances. A self-adaptive method based on the genetic algorithm is proposed, which...
Delivering desired QoS to the applications is one of the most important challenges in next generation networks. Designing efficient queue management in midway nodes leads to improvement in NGN efficiency. This paper presents fair Efficient active Queue Management (EQM) mechanism for congestion avoidance and control in next generation networks. Proposed AQM mechanism uses instantaneous queue length...
In DTNs, due to the unique characteristic of frequent partitioning, multicasting is a considerably different and challenging problem. Moreover, the single data multicast is different from multiple data multicast. In this paper, The mathematics model of multiple data multicast for DTNs is established, and the ant colony optimization algorithm introduce to solve the multiple data multicast problem....
In this paper, we propose a new intersection-based geographical routing protocol, called delay tolerant routing protocol (DTRP) that adapts to the changes in the local topology within city environments. DTRP is based on an effective selection of road intersections through which a packet must pass to reach the gateway to the Internet. The selection, in such delay tolerant VANETs, is made in a way that...
With the provisioning of interworked heterogeneous wireless networks and the growing popularity of smart mobile devices, ubiquitous service and data access is showing a demanding growth. As a result, scenarios of group mobility evolved with the increasing trend where a number of commuters on a transportation carriage would access such services. Making this scenario further complex, there was also...
One or more mobile nodes with mobile router(s) form a mobile network. Mobile router acts as the single point of attachment to the internet. As the configuration of mobile network changes, mobile router keeps track of its registered mobile nodes. Presently, a scheme has been designed for group registration of mobile nodes under a single home agent. In this paper, a communication scheme is proposed...
Underwater networks have attracted significant attention over the last few years. They can be used in scenarios like environmental monitoring and mine countermeasure but may also be part of modern marine warfare. A prominent example is Anti Submarine Warfare (ASW) with multistatic sonars. These networks may be sparse with potentially long distances between single nodes such that direct communication...
In our previous works, we defined a novel routing metric for organization-aware multihop wireless networks. We demonstrated that our proposed routing protocol with this new metric provides the much needed survivability and efficiency in battlefield environments when keeping the cross-organization data transfer at a low level. In this paper, we take one step further and propose ORION, a framework for...
In sparse mobile networks, nodes are connected at discrete periods of time. This disconnection may last for long periods in suburban and rural areas. In addition, mobile nodes are energy and buffer sensitive, such as in mobile sensor networks. The limited power and storage resources, combined with the intermittent connection have created a challenging environment for inter-node networking. This type...
At present most of the WSNs routing protocol only have a single research objective. The overall network performance lacks of multi-objective inspection and evaluation. The basic task of multi-objective routing is to find a route in the network which has sufficient resources to optimize some network parameters and satisfy multiple constrains. A multi-objective model, constrained of bandwidth, is put...
Among the route optimization schemes in NEtwork MObility (NEMO), the prefix delegation-based schemes perform better than other schemes. Since the prefix delegation-based schemes are designed for communication between a mobile network and a wired network, they lack evaluation for the case of intra mobile network communication involving MIPv6 incapable hosts in a mobile network. We evaluate prefix delegation-based...
Delay Tolerant Networks are with intermittent connectivity, high latency and without end-to-end paths from the source to the destination. Message delivering in these networks is characterized by store-and-forward. So the sequence of message delivering and discarding is important to the performance of routing algorithms. However, there is little effort concentrating on buffer management optimization,...
An adhoc network is a collection of mobile nodes connected by a wireless link, where each node acts as a router. In order to facilitate the communication within the network, a routing protocol is needed. Due to bandwidth constraint and dynamic topology of the mobile adhoc networks supporting quality of service (QoS) is challenging task. The aim of this work is to present QoS enabled routing protocol...
For several reasons, such as redundancy and independence of ISP, a end-site would connect to more than one ISP. The major challenge of multihoming is to maintain connection survivability when network outage happens and the multihomed site looses physical connection to one of the ISPs. Several solutions had been studied by the Internet Engineering Task Force (IETF) multi6 working group (WG), however...
Reducing delay is a key issue for nested Network Mobility (NEMO). When handover bursts out, the process of the Care-of Address (CoA) generation and the duplicate-address detection is much more time-consuming than other processes. In this paper, by utilizing the access router tree model and the Hash method, we propose a novel scheme for CoA configuration and a corresponding handover algorithm, to reduce...
In this paper, we study the problem of gateway selection for throughput optimization in multi-radio multi-channel wireless mesh networks. In contrast to the various methodologies in the literature, we explicitly model the delay overhead that is incurred during channel switching, and consider this delay issue in the design of our mechanisms. From our best knowledge, it is the first time to take account...
The study of the multicast routing protocol of multi-constrained is important for the development of the high performance network. The aims are the multi-constrained network model and the definition of the formula of every constrained characteristic measurement. However, it is a NP-complete problem. In order to gain the approximative solution, many heuristic algorithms have been designed by filling...
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