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Soft-switching of resonant dc-dc converters is used to enable high switching-frequencies and miniaturization of filter components. These converters are typically modeled using a first-harmonic approximation. This results in generalization of the operating modes, by only using the first harmonic of the converter. In this paper a phase-shift controlled series-resonant converter is analyzed per operating...
While the throughput demand for a backbone router keeps increasing constantly, both routing and switching of packets are facing tough challenges for running faster. Currently, the prefix tries based routing algorithms are playing a key role in building high performance routing systems. We proposed in this article a routing architecture for scaling the throughput of a trie-based routing system, which...
OSI is an open access system interconnection reference model, is a very good agreement defined protocol specifications. OSI model has seven layers; each layer can have several sub-layers. According to the comparison of OSI and TCP/IP, and research based on the OSI model implementation models and protocols of the Internet, and the OSI model of data transmission between the layers.
This paper describes the behavior of a monolithic DC-DC buck converter's active switch during its on-to-off commutation, under de presence of parasitic inductances due to package pins and bond wires. The parasitic inductances inbuilt in the power supply path cause a voltage spike when commuting the converter current from the active (high side) switch to the passive (low side) switch. This study is...
Researching on use of new real-time connection-oriented services like streaming technologies and mission-critical transaction-oriented services and more reliable network become inevitable trends presently. MPLS is a next generation backbone architecture, it can speed up packet forwarding to destination by label switching. However, if there exists no backup LSP when the primary LSP fails, MPLS frames...
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...
Network-on-chip mapping and the configuration of the communication parameters are critical process of the NoC design. They significantly influence the performance, area and power of the NoCs. We take the NoC mapping problem and the design of the communication parameters both into account. First, we formalize the problem of NoC mapping. Then we propose an analytical delay model based on wormhole switching...
In contrast to a typical pyramid information system, resources and services in a networked information system are often distributed, published, accessed and updated by multiple service providers. The networked information systems need to support the logistical aspects of business processes at hand. How to invoke these services to satisfy the users' requirement? A lot of research work has been done...
There are some disadvantage in traditional "special line" networking, IP network, frame relay and the ATM network. A VPN networking project which based on MPLS is put forward in order to solve the problem. Then analyze the realization of MPLS VPN. The simulation principle, simulation process and simulation scenes are introduced by OPNET, get the results that MPLS VPN has lower delay and...
Video-streaming can now be offered on third-generation (3G) mobile networks. Most research efforts have focused on video download. This paper presents a detailed study of challenges faced for successfully deploying applications requiring life video upload. Both subjective and objective qualities as well as the effects of mobility are analyzed on real 3G networks. Consequently, video profiles are identified...
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