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With the popularization of Internet and formation of wireless technologies provide significant impact on Internet and Communication Technologies. These technologies have support of one of famous technique known as Adhoc Network. Adhoc Networks are assortment of mobile nodes connected by wireless links and also receiving attention in the scientific community. In adhoc networks, routes may be disconnected...
The web caching business has significantly changed over the recent years. The percentage of content that is suitable for caching has constantly decreased, e.g. due to unfavorable content formats like Flash or varying URLs due to usage of CDNs. While this of course has a negative impact on the effectiveness of caching, also other parts of the equation have changed: Transmission cost has dropped significantly,...
Energy costs for data centers are a significant part of the overall expenses for their operation. With a reduction of these and associated costs, huge savings can be achieved. This paper describes a way to reduce the energy costs for data centers. The general idea behind our solution is very simple. Instead of routing the information required for any service interaction to and from the data center...
Recently, scaling problems faced by today's Internet are attracting more and more attentions. It is commonly recognized that separating IP address into identifier and locator is an effective way to solve the problem. How to map identity onto locator is a critical challenge for the locator/ID separation network. We present a resolution of mapping service based on one-hop DHT to resolve a locator for...
A mobility management scheme for an all-IP Wireless Metropolitan Area Network (WMAN) is developed in this paper. The proposed scheme is topology-independent and user-independent, in the sense that it does not assume any mobility pattern, delay constraint, or network topology. The key idea is to use a topology-learning algorithm that enables to perform localized mobility management, by efficiently...
Recent years, the mobile ad hoc networks (MANETs) research community has been very active. Thus, it is of growing importance to build distributed network applications on top of MANETs. DHT is known as a popular technique to build efficient distributed applications in the Internet. However, in MANETs, DHT needs to consider network traffics, moving of nodes and energy efficiency more carefully than...
The NEMO basic support protocol is a home agent based technique (derived from mobile IPv6) that permits the mobility of a network of IPv6 devices to be supported through the use of a dedicated mobile router. This NEMO mobile router accepts connections from IPv6 nodes and transparently manages any IP mobility on their behalf, which means that as well as individual hosts, a NEMO mobile router can also...
In this paper, we propose a banyan-tree topology for the railway wireless mesh network (WMN), which could normally stretch up to hundreds and thousands kilometer along the railway. Theoretical analysis and numerical studies show that the proposed banyan-tree topology is appropriate for the implementation of multi-hop WMN along the railway with improved network robust, and is feasible to deploy because...
Nowadays, inter-domain routing for MANETs draws increasing attention because of military and vehicular applications. The challenges in wireless, mobile inter-domain routing include dynamic network topology, intermittent connectivity, and routing protocol heterogeneity. The existing Border Gateway Protocol (BGP) is the de facto inter-domain routing protocol for the Internet. But BGP is not applicable...
Routing, the act of moving information across an Internet work from a source to a destination is one of the major issues in computer network literature. When it comes to mobile ad hoc network, the complexity increases due to various characteristics like dynamic topology, absence of centralized authority, time varying QoS requirements etc. The biggest challenge in this kind of networks is to find a...
With the increasing demand of ubiquitous computing, the interconnection of mobile ad hoc networks (MANETs) to Internet is also getting attractive, which is so-called hybrid or connected MANET. In MANET paradigm, routing is a challenging task due to mobility and the resulting inherent dynamic network topology. In many applications, multipath routing scheme is favorable than single-path routing due...
In this paper, we introduce and evaluate ScaleMesh, a scalable miniaturized dual-radio wireless mesh testbed based on IEEE 802.11b/g technology- ScaleMesh can emulate large-scale mesh networks within a miniaturized experimentation area by adaptively shrinking the transmission range of mesh nodes by means of variable signal attenuators. To this end, we derive a theoretical formula for approximating...
In complex networked systems, such as the Internet, power grids, and communication networks, the loadings of the network nodes may cause a network collapse. To prevent the ensuing economic and quality of service related losses, we need to understand the mechanisms of how local and global loadings cause network wide effects in complex networked systems. In this paper we will study this issue by MCMC...
The airborne network (AN) is a constellation of networked aircrafts flying in periodic orbits. AN is an enabling technology for network centric warfare for the military, autonomous air traffic control for commercial aviation and for providing Internet access over a broad urban area. AN is a highly dynamic environment and presents challenges that have not been addressed in traditional wire-line or...
In the last period a dynamic and accentuated development of the embedded systems takes place. More and more embedded systems can be found. The connection of the embedded systems in networks became a necessity. The connection can be with or without physical wires. The ad-hoc networks are a special category of wireless networks. In their classical form they do not have an infrastructure, all the nodes...
This paper describes a study on beam switching scheme applicable to the cognitive radio communication, from the viewpoint of the efficient use of radio frequency resource, as a function of the response time of Web browsing. The beam switching is time division scheme of the assigned frequency bandwidth among one wireless link and another links. Regarding the radio network, we consider three types of...
Both Peer-To-Peer (P2P) and mobile ad-hoc networks (MANETs) aim to provide seamless connectivity and services in a dynamic and decentralised environment. These two technologies, if unified, may be able to realise MANETs as a viable commercial technology and will enable the development of widespread distributed applications for MANETs. The push towards wireless ubiquitous computing means that service...
To integrate mobile ad hoc networks with the fixed Internet, it is important for mobile nodes to obtain the information of available gateways. To achieve this purpose, gateways periodically flood advertisements to all the nodes or nodes send solicitations on demand. These two approaches are so-called the proactive and the reactive gateway discovery. The hybrid gateway discovery combines these two...
In this paper we report on a multimedia communication software with a distributed architecture and its applications. It is a simple, ready-to-use scheme for distributed presenting, recording and streaming multimedia content over unicast or multicast networks. Dedicated end-to-end bandwidth management optimizes its network resource consumption. Additionally we report on group communications schemes...
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