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Delay Tolerant Networks (DTNs) are intermittently connected mobile networks, in which a fully connected path from source to destination does not exist. Therefore in these networks, message delivery relies on opportunistic routing where nodes use store-carry-and-forward paradigm to route the messages. However, effective forwarding based on a limited knowledge of contact behavior of nodes is challenging...
In urban vehicular network, existing routing protocols using beacon message scheme and P2P (peer to peer) density discovery scheme can hardly make a good performance as well as keep a high feasibility. This paper proposes an IGOR (improved geography and overlay routing) in urban vehicular environment. In IGOR, RSUs (road side units) are introduced to support the road density discovery. A passive neighbor...
The topological properties of mobile P2P Ad Hoc networks are critical factors that dominate the performance of these networks. The node degree and diameter of these networks are most important parameters which measure the autonomy, efficiency, robustness and load balancing of these networks. In order to improve the four features for these networks, researchers have proposed many practical systems...
Mobile ad hoc network and peer-to-peer networks are most advancing and emerging research areas in the recent years. Both of these networks are based on the same phenomenon like self-configuration and self-organization. Although, peer-to-peer network was firstly designed for wired network but now a days it may be deployed over mobile ad hoc network. When P2P networks are deployed over ad hoc network,...
The work presents a decentralized protocol that allows self-organization of autonomous wireless devices in mobile mesh networks. In the resulting infrastructure the routing and information services are provided in a peer-to- peer fashion. Both services are performed through multi- hop radio transmissions among participant nodes with no fixed infrastructure required and avoiding to use broadcast of...
Recent researches of network structure are moving to high-level networks because there are already many research results of low-level network. Especially, current network services has been changed to the multimedia service using multicast routing such as IPTV (Internet Protocol Television) service. Then the same as the existing multicast services to multiple users at once placed to transmit the purpose...
In this paper, the problems facing designers of peer-to-peer instant messaging protocols, specifically those intended to run over mobile ad-hoc networks, are discussed. In particular, the challenges of identity management and presence dissemination are addressed, with an efficient and user-friendly protocol described that solves them. As a side effect, a form of social network mining is offered that...
A mobile ad-hoc network (MANET) is a peer-to-peer wireless network where nodes can communicate with each other without the use of infrastructure such as access points or base stations. Nodes can join and leave the network at anytime and are free to move randomly and organize themselves arbitrarily. Due to this nature of MANET, it is possible that there could be some malicious and selfish nodes that...
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...
A Mobile Ad hoc NETwork (MANET) is composed of a set of wireless mobile devices that are able to communicate with each other in a peer-to-peer mode. In recent years video streaming over MANETs has drawn significant attention due to the popularity of high-speed IEEE 802.11 standard series. However, it is still a challenging task for channel variation and bandwidth limitation and fluctuation. In this...
A mobile ad hoc network (MANET) is composed of a set of wireless mobile devices that are able to communicate with each other in a peer-to-peer mode. In recent years video streaming over MANETs has drawn significant attention due to the popularity of high-speed IEEE 802.11 standard series. However, it is still a challenging task for channel variation and bandwidth limitation and fluctuation. In this...
Support of P2P communities in mobile environments is a challenging task. To this purpose numerous algorithms have been recently proposed to speed up resource search throughout the network. Among these, structured DHT approaches seem very promising since they allow for a successful resource search by keeping complexity low. One of these techniques denoted as Georoy, was recently proposed with the aim...
This paper introduces P2P communication across a VANET and seeks to establish under what conditions (mobility, network size, wireless channel) data streaming is feasible. Routing of streamed services over multiple hops and multiple paths may result in significant packet losses, resulting in unacceptable quality of service. This paper examines the impact of differing traffic densities and different...
Peer-to-peer networks are rather well-studied and currently there are numerous systems based on peer-to-peer principles running on the Internet. On the other hand peer-to-peer networks for mobile ad-hoc networks have attracted attention only in the recent years. In this paper, we propose a novel peer-to-peer file sharing system particularly designed for mobile ad-hoc networks. The proposed system,...
Mobile ad hoc network is a special peer-to-peer network with a wide range of application that has no infrastructure, multi-hop, self-organizing, dynamically reconfiguration and mobile. People are now paying more and more attention to the using of ad hoc network in the emergence area such as battlefield and disaster rescue. The research on its energy and security are one of the most important aspects...
Peer-to-peer file sharing applications are increasingly popular and they enable users to share various files with high scalability. However, in intermittently connected mobile network environment, existing file sharing systems are hindered by the lack of node stable connectivity and constant network topology change. We propose a social network based file sharing system in mobile P2P networks. It takes...
Mobile ad-hoc networks (MANETs) are adaptive and self-organizing, and as a consequence, securing such networks is non-trivial. Most security schemes suggested for MANETs tend to build upon some fundamental assumptions regarding the trustworthiness of the participating hosts and the underlying networking system. If MANET is to achieve the same level of acceptance as traditional wired and wireless network...
Peer to Peer (P2P) as well as mobile ad hoc networks (MANETs) follows the same idea of creating a network without the help of central entities. Both networks are faced with the same fundamental challenge - routing. Distributed Hash Tables (DHTs) have recently proven to be a novel and efficient way for locating objects. Routing protocols of MANETs can potentially benefit from the combination with DHTs...
Mobile ad hoc networks (MANETs) are self-organizing and adaptive, and securing such networks is non-trivial. Most security schemes suggested for MANETs tend to build upon some fundamental assumptions regarding the trustworthiness of the participating hosts and the underlying networking systems without presenting any definite scheme for trust establishment. If MANET is to achieve the same level of...
Peer-to-peer (P2P) networks and mobile ad-hoc networks (MANET) share many similarities. However, building a P2P overlay network directly on top of a MANET can lead to poor performance unless specific cross-layer optimization is adopted. We propose a novel solution comprised of a MANET routing protocol, a middleware and an inter-layer communication mechanism which facilitates P2P application development...
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