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While there has been many studies on the efficient design of p-cycles focusing on optimizing their spare capacity efficiency, few of them consider such a design under the wavelength continuity assumption, i.e., no wavelength converter at any node. Consequently, few authors look at the routing and wavelength assignment in the context of p-cycles, where p-cycles have to be assigned the same wavelength...
Powerline Communications (PLC) is a favorable communication technique for many smart grid applications such as AMI and powerline health monitoring. With the existing powerline infrastructure, PLC provides both communication security and ubiquitousness. However, long-distance communication is very challenging in PLC due to its frequency-dependent channel and noise characteristics. To provide reliable...
In this paper, Service Boundary Line approximation method is proposed to improve the accuracy of aggregated link state information in transport networks that conduct hierarchical QoS routing. This method selects the main link state information in the network and transports the data to the external networks together with the aggregation information, reducing information distortion caused from the loss...
The paper presents the comparative study and analysis of buffering in Goback2 network. The performance at the destination node by applying different buffering capacities at the routers is demonstrated. The results using NS2 simulator are produced. It can be concluded that the selection of appropriate type of buffering helps in controlling the congestion and the packet drops at the link node.
This paper proposes a simple path diversity algorithm (SPDA) for Interdomain routing. The SPDA uses source routing to find an alternate path from a source to a destination, and allows flexible division of traffic over the best and alternate path. The SPDA comprises three steps. First, the BGP protocol is extended to allow the BGP routing table to save the multiple paths for any destination. Second,...
KNXnet/IP system allows integration of different KNX networks through an IP network, used as fast backbone. Integration is realised by a particular device called KNXnet/IP Router. Due to the very limited transmission speeds foreseen for the KNX networks, the KNXnet/IP router may represent a bottleneck in routing telegrams coming from the IP network whose destination is a KNX device located in the...
Real-time applications such as multimedia streaming and video conferencing have quite stringent Quality of Service (QoS) requirements from the network, because they are more sensitive to available bandwidth and loss rate than non real-time traffic. To provide scalable and simple Quality of Service (QoS) mechanism for multicast services, Probe-Based Multicast Admission Control (PBMAC) scheme was proposed...
Admission control plays an important role in providing Quality of Service (QoS) guarantees for wireless mesh networks (WMNs). Multipath routing can improve network performance in reliability and load balancing. However, when the multipath routing are adopted in 802.11-based WMNs, the transmission with bandwidth assurance is facing rigorous challenges. In this paper, a novel joint design of multipath...
Cooperation among mobile nodes during establishment of a cellular connection can improve the performance of the network by lowering the transmission power and increasing throughput of the end nodes. Multipath routing is one way for such cooperation by using multiple parallel paths between source and destination nodes, where the main data stream is split into streams of lower data rates and routed...
While multiple access links enhance the availability and utilization of multicast service nodes, the resource allocation balancing needs to be performed on a link basis, which is usually not considered in most overlay multicast routing algorithms. To accurately represent the bandwidth consumption of each overlay node, we need not only a multihomed proxy model to describe the overlay multicast routing...
Network Coding is a new field that aims at, notably increasing the throughput in a network. ROCX [1] is an algorithm that makes routing with the awareness of network coding. However, its major limitation is that it does not take into account the bandwidth limitation and the interference impact. If the interference is not considered in a wireless network, a flow requiring a certain bandwidth might...
Traditional multicast routing algorithms such as shortest path tree (SPT) and Steiner tree (MST) do not consider the wireless broadcast advantage or the underlying channel assignments in a multi-channel multi-radio (MCMR) wireless mesh network (WMN). We propose multicast routing algorithms that take into account the above factors in order to minimize the amount of network bandwidth consumed by a routing...
Typical wireless multimedia sensor networks are composed of many randomly deployed nodes which can retrieve information from the monitored field and relay packets following a hop-by-hop communication model. The transmission of packets from source nodes to the destination may flow across multiple paths, each one comprised of a number of intermediate nodes. The simple existence of a sensing unit in...
Optical Transport Network (OTN) is a standard approach to offering transport support to a variety of existing service technologies, e.g., ESCON, HDTV, GE, etc. Multiple service technologies can be concurrently multiplexed onto one common transport network, which offers hierarchical transmission rate wrappers physically supported by Wavelength Division Multiplexing (WDM) lambda channels. Algorithms...
Traditional IP multicast technology establishes and maintains a tree for each multicast group, and this leads to a serious state scalability problem when large numbers of multicast groups exist in a network. As a novel scheme to address this scalability problem, aggregated multicast forces multiple groups which have identical or similar trees to use one deliver tree. Given the number of multicast...
In the paper the mathematical model of traffic management in the MPLS-TE DiffServ network is proposed. This model describes the processes of routing and distribution channel resource. In article the method of two-level traffic management in the MPLS-TE DiffServ network is offered to improve the scalability of the solutions on the basis of interactions prediction.
This work presents a study of RTP multiplexing schemes, which are compared with the normal use of RTP, in terms of ITU R-factor quality estimator. The bandwidth saving of the different schemes is studied, and some tests with VoIP traffic are carried out in order to compare R-factor using three different router buffer policies. Network delays are added using an adequate statistical distribution. The...
We investigate link-state advertising in multi-domain networks with dynamic traffic. A novel triggering scheme is proposed to monitor a subset of domain links, and thereby achieve a balance between salability and accuracy.
We consider, for the first time, the problem of flexible/open wavelength assignment and propose an optimal as well as heuristic solution. Simulation results validate our solution to within 15% of the theoretical spectral limit.
We analyze the blocking performance of spectrum efficient super-channels in dynamic flexible grid networks. Results demonstrate that increased spectral efficiency and flexible super-channel assignment do translate into network efficiency gains.
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