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An optical buffering architecture based-on traffic load selection was put forward for optical packet switching networks in the paper. For improving the limited fiber delay lines utilization, the segment shared buffering mechanism be used to configure the output fiber delay lines and the output/feedback shared buffer module configuration using degenerate model. When the traffic load is larger than...
In recent years, China P2P streaming industry, represented by PPlive and PPstream, has been having rapid progress, with the consumer scaled up and enhancement of the financial gain. The development brought the enormous consumption of network bandwidth. P2P streaming traffic identification provides the reliable basis on solving the overspend problem of the network bandwidth. This paper firstly introduces...
Different dynamic routing and wavelength assignment algorithms for WDM optical networks are described in this paper. A new dynamic algorithm based on the layered graph model and called Multi-object Optimal Algorithm (MOA) is proposed. A distinguished feature of MOA algorithm is that it employs more accurate network information than the existing algorithms on the availability of both the number of...
Admission control and routing are two key mechanisms for advanced Quality of Service (QoS) and Traffic engineering (TE) support in the data networks. However, traditional QoS and TE solutions usually focus exclusively on routing to achieve network resource usage optimization, while often neglect to give adequate attention to admission control. To provide a more comprehensive solution, a novel approach...
As the bi-directional failure notification may cause signaling burst conflict in a short time, a mechanism named single-node failure notification (SNFN) based on RSVP-TE (resource reservation protocol - traffic engineering) is proposed. SNFN implemented by extending the RSVP-TE protocol rules the node issuing the notification signaling call according to ordered numbers, no matter up-stream or downstream...
The network coding paradigm enables better resource utilization and improves throughput in communication networks, thus, employing network coding in all-optical multicast networks will facilitate the future development of effective optical networks. However, some properties of optical networks, such as limited buffering and weak logic operation capabilities, restrict the application of network coding...
In this paper, we propose a method to save energy consumption for the rejoin procedure of ZigBee networks. By skipping the active scan process, a rejoining node and its neighbors are able to save a large amount of energy. In addition, the rejoining node chooses the suitable potential parent by reserving and utilizing original neighbor table. This method is capable of reducing the number of rejoin...
Owing to the heterogeneity and high degree of connectivity of various networks, there likely exist multiple available paths between a source and a destination. To be able to simultaneously and efficiently use such parallel paths, it is essential to facilitate high quality network services at high speeds. So, traffic splitting, having a significant impact on quality of services (QoS), is an important...
A novel two end-nodes initiating restoration scheme for optical networks is proposed to further reduce the restoration time, which focuses on the defect resulted by only single end-node initiating restoration in the most of current restoration schemes. Under the proposed scheme using pre-computed route, the fault indication messages trigger the source and the destination respectively, and then initiates...
In enterprises and residential networks, there are always multiple classes of traffic sharing the limited access bandwidth, and multiple token buckets are used to guarantee the usage of every class. At the same time, network managers hope to utilize the idle resource, in case of the bandwidth for some classes is redundant, for higher classes, as well as lower classes. A bi-direction adjustable multi-class...
The continuous growth in both commercial and public network traffic with various quality-of-service (QoS) requirements is calling for better service than the Internet's best effort mechanism. One of the challenging issues is to predict the overall behavior of aggregate network traffic. While network traffic characterization has been studied extensively due to its importance in network scheduling and...
We have undertaken a thorough measurement and modeling study of IPTV CDN traffic. We have collected and analyzed network-layer IPTV CDN traffic measurements and, based on the characteristics of IPTV CDN traffic, a traffic model has been developed and verified with NS-2 simulation. Our simulation results indicate that the proposed traffic model complies well with the real IPTV CDN traffic. We detail...
The future network will support global roaming seamless and service provider portability. An identifier locator (ID/Loc) separation solution can achieve such a goal. Nevertheless, this ID/Loc separation scheme implies the need of adding a mapping system to store and maintain the binding between locators and identifiers. And this approach may introduce large signaling of the location update and the...
In order to plan the network construction reasonable and ensure the quality of network service, it is important to measure the Link-bandwidth utilization and get the flow information. One of the methods to monitor network efficiently is based on flow-conservation, and the problem of searching a solution for this method could be deduced to solving weak vertex cover problem, which has been proved NP-hard...
Anycast is a new service of IPv6. How to guarantee its quality of service(QoS) has become an important subject. An anycast QoS routing algorithm supporting traffic engineering(ART) in multi-protocol label switching(MPLS) networks is proposed. In order to select a QoS path for client's bandwidth request, information regarding the source-destination pairs is used to reduce the interference between current...
Based on grey theory, a combined wavelet-GM (1,1) forecasting model is proposed. The random properties of some non-stationary time series can be reduced by wavelet decomposition into many series according to different scales. Decomposed time series are predicted with GM (1,1) model to obtain forecasted results of the original time series. Experiments on network traffic show that the combined model...
Stochastic fairness queuing scheduling scheme resolved the connection level fairness problem and are widely used in traditional network, however, with rapid development of P2P services in Internet, this classical algorithms failed in maintaining fairness among hosts. In this paper we proposed an improved SFQ algorithm: Dual Class SFQ to ensure the fairness among hosts using different type of services...
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