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Today's Internet is a massive, distributed network which continues to grow in size as globalization takes major role in everyone's life. The problem is complicated by the fact that one cannot rely on the cooperation of individual servers and routers to aid in the collection of network traffic measurements vital for these tasks. Packet Forwarding Priority can have a significant impact on the performance...
Numerous studies based on complex measurement platforms have been carried out for over ten years now in order to discover the Internet topology on domain level. It turns out that this topology exhibits certain invariant properties such as a distribution of node degree. This distribution follows a power law. Moreover, the revealed topology is hierarchical. The hierarchy is caused by commercial contracts...
This paper discusses the QoS topology control problem with consideration of power control and rate adaptation in wireless mesh networks. Our task is to construct a routing forest (a set of trees rooted from the gateway nodes), configure the transmission power of each node, such that the constructed network topology can meet the delivery threshold for all nodes and the system throughput is maximized...
Wavelength Routed Photonic Networks (WRPNs) with a fully distributed control plane promise to satisfy the increasing infrastructure needs of upper layer clients regarding automatic, on-demand guaranteed services. In this highly dynamic scenario, lightpath provisioning based on classic Routing and Wavelength Assignment (RWA) approaches is inappropriate, mainly due to poor network resource utilization...
Core networks are increasingly supporting overlay networks on top of an IP-WDM network. As network reliability is a growing concern, a major challenge in the survivable layered network design is the crosslayer survivable mapping problem that deals with QoS parameters such as availability, lightpath length, and many others. This work directly studies this problem and proposes matrix formulations of...
To meet topology changes causing by the growing web application dynamically,and with Agent of the high degree of flexibility, collaboration, autonomy, and self-adaptive characteristics, this paper discusses a self-adaptive interaction strategy based on Multi-Agents in hierarchy and analyzes an abstract model in which Multi-Agents are divided into the main Agents and sub-Agents in different layers...
Many-to-many multicast can be widely used in computer and communication networks supporting various continuous multi-media applications. This paper assumes each user is both a source and a receiver as well as a terminal in many-to-many multicasting. Under this assumption a many-to-many multicast tree appears as a terminal Steiner tree (TeST). This paper uses a heuristic idea of under a fixed TeST...
With services provided by mobile operators enriching and demands on quality of service increasing, to provide better services and make full use of the underlying network has become an urgent task. To solve these problems, the overlay network is proposed, it can make a virtual network on the basis of different physical networks. In this paper we make a discussion on the QoS framework of IMS overlay...
Wireless mesh networks (WMNs) are comprised of nodes with multiple radio interfaces and provide broadband residential internet access or connectivity to temporal events. Our goal is to simplify the network deployment of such a mesh network, and towards that we are presenting procedures for automatic configuration and optimisation of the network. We first present an architecture framework that supports...
The unifying network architecture has contributed to a wave of work on layered network evolution. The undertaking of this paper is twofold: This paper's first-of-its-kind examination of the problems of logical link mapping and traffic flow routing unveils that backhaul traffic, a flow loop that occurs at any lower link layer below the traffic layer except its own, could happen in the traffic flow...
Introducing Peer-to-Peer (P2P) technology into IP Multimedia Subsystem (IMS) is hard but important, especially to the streaming media service. Based on the strength analysis of IMS and P2P, three solutions with the features of signaling centralized and media distributed are compared, and eventually the solution of managing P2P via application server is selected. For the purpose of reusing the public...
IEEE 802.15.4 is the emerging next generation wireless standard designed for low-rate wireless personal area networks (LR-WPAN), which suit wireless sensor networks applications. It attempts to provide a low cost, low power and short range wireless networking. The QoS is more challenging in heterogeneous wireless sensors networks, where a diverse mixture of sensors for monitoring temperature, pressure,...
System capacity is an important factor that affects the performance of WiMAX system where the amount of data that can be delivered to the end user is determined based on the system capacity and users QoS requirements. This scenario is even more complex when multi-hop relays are introduced into the network whereas the user access capacity decreases with the increase of hop number. In order to maintain...
An established Intelligent Power Management (IPM) strategy for a Wireless Sensor Network (WSN) is based on the principal that redundant nodes can be hibernated to conserve their energy. Due to the hibernation, sensed data from the node will be unavailable, which essentially means that the WSN will be blind in the vicinity of the hibernating node. Numerous strategies have been proposed to maintain...
Most of the Quality of Service (QoS) routing mechanisms involve periodic exchange of global state information which causes communication overheads. Therefore, localised routing is the method to avoid this problem. The network in this technique is inferred by the source nodes using statistics which are collected locally. The main aim of this paper is to present new localised algorithm to avoid some...
The interest for providing services with performance guarantees across different connected networks has given new technical solutions allowing the computation of constrained inter-domain paths. Thus, the present paper treats the problem of computing inter-domain paths subject to multiple constraints. We study here existing algorithms for inter-domain computations, and describe new approach approximating...
The paper proposes a preliminary design of cross-layer quality of service applied to congestion control in future Internet. This is an alternative solution to QoS-aware routing, whenever the infrastructure operator cannot add new resources, and/or when re-routing is not possible. Dedicated software, running in each node, collects a list of local parameters such as available transfer rate and one-way...
The current work deals with the problem of resource management in P2P networks. The topological properties of the overlay network are critical factors that dominate the performance of P2P networks. The inverse Kautz digraph is a good topology to construct the overlay network. We discuss an efficient DHT-based overlay network (MREIK) with Byzantine fault tolerance. MREIK based on many rings which embeds...
To reduce influence of node failure and achieve high reliability in communications, research on node protection algorithm is needed. In this paper, we first provide an overview of current research of redundant tree algorithm (RT). Then we propose a new algorithm called single node protection algorithm (SNP) based on previous redundant tree algorithm, which is used to achieve recovery form single node...
Localized Quality of Service (QoS) routing has been recently proposed for supporting the requirements of multimedia applications and satisfying QoS constraints. Localized algorithms avoid the problems associated with the maintenance of global network state by using statistics of flow blocking probabilities. Using local information for routing avoids the overheads of global information with other nodes...
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