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The possibility of connecting vehicles to fixed IP networks through roadside units (RSUs) or even access gateways is seen as a very interesting alternative to fully infrastructure-less VANETs. However, getting access to those fixed networks must be controlled and only authorized users should be able to use those RSUs or gateways. However, that authentication process incurs in a not-negligible delay...
A challenge in the convergence of heterogeneous networks is how to combine the ubiquitous resources and provide the diversified individual services. By this, the vision of adaptive and context-aware service provision becomes possible and offers new opportunities for pervasive computing. In this paper, we describe an approach that addresses the convergence of wireless personal area and wide area networks...
A Mobile Ad hoc Network (MANET) is made up of mobile nodes that communicate through wireless connections, without any existing infrastructure or central administrator. Topology of the network is not fixed. Hence, routing in dynamic network is a new challenge. Nature-inspired algorithms (swarm intelligence) such as Ant Colony Optimization algorithms have shown to be a good method for expanding routing...
Geographic routing protocols allow stateless routing by taking advantage of the location information of mobile nodes and thus are highly scalable. Location service provides the location information of mobile destinations to source nodes so that location-based routing can be applied. Location service in mobile ad hoc networks is challenging because of the absence of any central intelligence in the...
A mobile device in a MANET must be allocated a free address before it may participate in unicast communication. Current solutions have different drawbacks. This paper proposes a novel address auto-configuration that works with global connected MANET. The proposed scheme may be applied to large scale MANETs with low complexity and low communication overhead. It supports frequent network partitioning...
This paper proposes a communication model which utilizes Anycast technology to perform the seamless communication between Ad Hoc network and IPv6 network. This model creates a new kind of IPv6 address auto-configuration scheme which does not needs detection of address duplication. In addition, in this model when a mobile node switches between different sub-nets it does not need to register its care-of...
Topology control aims to provide more spatial reuse and power conservation while keeping network's connectivity. However just a few number of efforts focused on the issue of topology control with mobility. Some of topology control algorithms (e.g. CEC) try to provide more energy conservation by sleeping the redundant nodes. This paper presents a sleep-based topology control algorithm, which is in...
This paper presents a new protocol for the formation and maintenance of a backbone from the nodes of an ad hoc network where all the nodes are mobile. The new protocol is defined and its performance evaluated with respect to metrics such as its size, that favors scalability, its connectivity in time, which allows protocols to run efficiently, robustness and route length. Via ns2-based simulation experiments...
In mobile ad hoc networks (MANETs), location-based routing protocols can offer significant performance improvement over topology-based routing protocols by using location information to make forwarding decisions. Location service provides the location information of mobile destinations to source nodes so that location-based routing can be applied. Secure location service in MANETs is challenging because...
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...
Maintaining user connectivity over heterogeneous wireless networks will be a necessity with the wide spread of wireless networks and limited network coverage. In, we propose a super node system architecture based on the concept of delay tolerant networks (DTN) to overcome roaming user intermittent connection over interconnected heterogeneous wireless networks. Mobile ad hoc network plays a key role...
The challenging problem in geocasting is distributing the packets to all the nodes within the geocast region with high probability. Sending packets to a node in the geocast region cannot guarantee delivery to all nodes in the region. It is because there may be some islands in which nodes are not connected each other within the region while they may reach through outside the region. Some geocast algorithms...
Several gateway selection schemes have been proposed that select gateway nodes based on single QoS metric, for instance link availability, link capacity etc. or multiple non-QoS metrics, such as the combination of gateway node speed, residual energy, and number of hops, for mobile ad hoc networks (MANETs). Each scheme just focuses to improve only single network performance such as network throughput,...
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...
Mobile ad-hoc networks, such as tactical networks, are frequently implemented using multiple subnets, or tiers, so that nodes in one tier can communicate to nodes in another tier only through gateways that can communicate in two of the tiers. The selection of the gateway nodes affects the robustness and performance of the connected subnets. This paper presents an algorithm for selecting gateways in...
The integration cellular networks, wireless local area networks (WLANs), and the new paradigm of mobile ad hoc networks (MANETs) is the trend for next generation mobile networks. And the multi-hop routing mechanism is an open and challenge issue in this area. In this paper, a multi-hop routing mechanism with fuzzy estimation of links for heterogeneous wireless networks (HWNs) is proposed. The mechanism...
Wireless ad hoc networks are connected to the fixed Internet by means of Internet gateways. Whenever a node within the ad hoc network wishes to communicate with a host in the Internet, it selects a default Internet gateway to relay its traffic from the ad hoc network to the Internet. In this paper, we formulate the problem of selecting the best Internet gateway as a mixed integer linear program minimizing...
With the gradual perfectness of IPv6 and the appearance of various kinds of the wireless applications based on Ad Hoc networks, the issues of how to expand the mobility of Ad Hoc networks and how to achieve the communication between Ad Hoc networks and the next generation networks where IPv6 plays a significant part have attracted more and more attentions. This paper proposes a communication model...
This paper analyzes the data access pattern to the gateway cache for the better design of direction-based query scheduling scheme, based on the real-life trajectory data. After defining an advanced route information service in which each vehicle requests the data items associated with all links along the route in the vehicular telematics network, experiments are conducted to investigate the queue...
In wireless communication, Mobile Ad Hoc NETwork (MANET) is a set of mobile nodes that are dynamically and randomly located in such a manner that the wireless link among nodes are often changing due to MANET dynamic features. In this MANET environment, if a device wants to connect to Internet, it must establish a communication with an Internet Gateway. The network performance between mobile nodes...
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