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In Wireless Mesh Networks (WMNs), supporting Quality of Service (QoS) to enable a rich portfolio of applications/real-time multimedia applications is foreseen to be vital for the success of next generation networking technologies. However, today's cutting edge standards are not perfectly equipped to cater to this task. These standards come with an inherent complexity and suffer from innate problems...
Cognitive Radio is often promoted to be a promising solution for the spectrum scarcity problem. Hence, a lot of research activities in both the civilian and the military world focus on introducing cognitive radio technology into modern networks. Besides the obvious changes in the radio architecture (sensing capability, cognitive engine), this combination of technologies also poses new challenges to...
Quality of Service (QoS) in Network-on-Chip (NoC) become an important research area. Lately, increasing demands on availability, performance and reliability of Network on Chip connectivity are driving to offer Network connections with QoS guarantees efficiency. However, until now there is no standard method of the Quality of Service (QoS) measurement and less techniques have been used to provide its...
To ensure the performance of Multi-Constrained Path (MCP) problem with respect to Quality of Service (QoS) requirements is NP-complete problem. The algorithm has to find the complete path from source to destination satisfying more than one constraint. This research aims to improve the performance of existing algorithm by assigning the appropriate priority to each link weight component. We use two...
Mobile Ad Hoc Networks have been deployed in a wide spectrum of domain ranging from military battlefields, natural disaster and manmade disaster management, conference, home networking, patient monitoring, remote landscape monitoring to name a few. MANET being an infrastructureless network with its inherent features like self-configuration, self-organizing and self-administration, it has been focus...
Merging IP routing and mobile communication poses many challenges especially for a dynamic, heterogeneous networking environment such as a Naval Task Force. In this paper, we present an effort to design, develop, test and demonstrate an interoperable coalition interface for a Naval Task Force for the four-nation Coalition Networks for Secure Information Sharing (CoNSIS) project. A field experimentation...
Network throughput and bandwidth overprovisioning do not provide equal quality of service for all applications. Time characteristics of the network must also be taken in mind when deploying applications which are sensitive to delay and jitter, e.g. VoIP. By means of changing the path of traffic significant improvement of the time-variable can be achieved. In this paper we propose a methodology for...
The fundamental challenges in wireless multihop networks design are the problems of routing and hidden stations. Defining mesh networking, IEEE 802.11s amendment addresses both issues. It includes a routing protocol and novel deterministic channel access method, called MCCA, complementing random access traditional in IEEE 802.11 networks. The routing framework architecture allows extending or even...
The dynamic and shared nature of wireless medium imposes an adverse barrier to supporting QoS for video streaming applications in wireless networks. In this paper, we investigate a case study of video streaming in a wireless mesh network to obtain important observations on the factors which impact video quality in multihop wireless mesh networks. Based on our analysis of the case study, we propose...
Finding a path that satisfies multiple Quality-of-Service (QoS) requirements is vital to the deployment of current emerged services. However, existing QoS routing algorithms are not very efficient and effective at finding such path. Moreover, few works focus on two or more QoS constraints. In this paper, we propose an effective fully polynomial approximation scheme (FPAS) for multiconstrainted path...
The most widely used standard for wireless networks is the IEEE 802.11. In 802.11, dense deployment of Access Points (APs) is needed to meet customers' demands. The installation of multiple access points is expensive and not convenient because of Ethernet wiring from access points to backhaul network access modem, hub, etc. Wireless mesh network (WMN) is an emerging technology; presented mainly as...
Secure routing protocol attracts much more attention in mobile ad hoc networks for the purposes of secure data transmission. But the improvement of security often sacrifices the delivery rate or other QoS. We propose a secure routing protocol by integrating multipath routing and secret sharing, meanwhile, select efficient and secure multiple disjoint routes by integrating multiple metrics including...
This paper presents a dynamic self-organizing design for a server cluster that supports multiple services with different priorities. Our system dynamically allocates jobs to servers in a server cluster, while maintaining certain QoS objectives for each service. A "Local leader" is dynamically set up for each service, and it controls the membership of its service, and thus the cluster size...
There is an increasing acceptance for Wireless Mesh Networks (WMN) as the potential `last-mile' access technology running media-rich applications with stringent quality of service (QoS) requirements. As WMNs are envisioned to provide high bandwidth broadband services to a large community of users, the Internet Gateway which acts as a central point of attachment for the mesh routers is likely to be...
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