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Resilient Packet Ring (RPR) is the metropolitan area network (MAN) architecture of based on optimization of packet service, its ring fabric is the part of register insert ring. Register insert ring has the characteristics of time-division multiplexing and space-division multiplexing, and the schedule of ring fabric is simple. It is suitable for fabric of switch. The article uses register insert ring...
The wide prospects of application of Underwater Acoustic Sensor Networks (UASNs), promoting the technology of UASNs. Network topological structure makes a strong impact on the throughput, power consumption and stability of network, wherefore it is important to optimize topological structure of network for UASNs. The underwater acoustic channel is characterized by limited bandwidth, lower communication...
Future Internet, Inherent Network Management (INM) and business aspects such as OPEX/CAPEX are topics of vivid research activity for quite some time. This paper focuses on the combination of the three areas, showing what is expected from recent Future Internet activities based on experience in the 4WARD project founded by the European Union. We briefly introduce the notion of INM and the related de-sign...
In this work, we present simulation results of SOAs optical bandwidth widening. Results are based on SOA model associated to an optimization algorithm in order to design the spectrally selective filter. A widening of 60% is achieved.
This paper presents a wide-band Yagi-Uda antenna with X-shape driven dipoles and parasitic elements using differential evolution algorithm (DE). In the optimization process, a method of moments code, NEC code simulates the antenna designs generated by DE. In order to illustrate the capabilities of the method, a nine-element Yagi-Uda antenna is given. The measured and simulated impedance bandwidth...
In this paper we propose the optimization of sparse matrix-vector multiplication (SpMV) with CUDA based on matrix bandwidth/profile reduction techniques. Computational time required to access dense vector is decoupled from SpMV computation. By reducing the matrix profile, the time required to access dense vector is reduced by 17% (for SP) and 24% (for DP). Reduced matrix bandwidth enables column index...
This paper considers a hybrid hierarchical P2P overlay network structure that consists of both super and normal peers. The media streaming architecture is built upon a tree-structured network of super peers and the tree construction process has a significant impact on the overall system performance. We build network cost models and formulate a specific type of problem to maximize the minimum node...
IP multicast often has great scalability problem with the router to keep forwarding state for every multicast tree passing through it. An aggregated multicast technology were proposed by Jun-Hong Cui and others in order to solve this problem, which enables the multicast groups that can be integrated to share one distribution tree so that the multicast state can be reduced efficiently. But this is...
The design of telecommunication network concerns the selection of arcs in a graph with involved cost as low as possible, but satisfies constraints such as point-to-point demands routed across the network, arc capacity, hop constraints and so on. Such a design must allocate enough flows and diverse routing paths through the network to ensure that feasible information flows continue to exist, even when...
The diverse types of service beared on the large-scale IP network makes bandwidth allocation a research focus. This paper proposes a dynamic and fine-grained bandwidth allocation method which is suitable for large-scale network. We extends Norros' Fractional Brownian Motion (FBM) model to make it fit for the allocation of service bandwidth in IP network. Through identifying and analyzing different...
With the presentation of more reliable groupcast proposal for IEEE802.11 WLAN, the QoS of video transmission based on groupcast (multicast / broadcast) is improved. To adapt the network load and bandwidth dynamic change in WLAN environment, we design a flexible optimization mechanism that integrates video steam priority character with more reliable groupcast technology. Simulation validates it is...
A novel 3-way rectangular power divider is proposed which is a modified version of the Bagley power divider. The method of least squares is developed for its design and optimization, which determines the line section lengths and widths. The design specifications are made on the desired values of scattering parameters, which tend to minimize the input reflection coefficient and realize the desired...
QoS-aware network planning becomes increasingly important for network operators and ISP alike as the number and heterogeneity of applications supported by networks continue to increase. We have proposed an architecture and methodology to support QoS-aware route planning for IPTV networks. The route planning problem was formulated as a residual bandwidth optimization problem and solved using GA-VNS...
Several small to moderate ultra-wideband antenna arrays with impressive performances have been created by directly optimizing the element spacings using the covariance matrix adaption evolutionary strategy. Because of the capabilities of CMA-ES, these problems with large parameter sets (e.g. 49 parameters for a 50 element array) are able to be successfully tackled to produce fruitful designs. Even...
Grid networks take advantage of the resources available by many computers connected within the network to solve large-scale computational problems. To achieve a scalable and reliable Grid network system, the workload needs to be efficiently distributed among the computing resources accessible on the network. Therefore, a distributed and scalable load-balancing scheme for Grid Networks is proposed...
The problem how to improve the quality of server(QoS) of the heterogeneous network must be studied and solved, for long round trip times (RTTs), not negligible packet error rates (PER), and downlink-uplink asymmetry, etc. Posing new challenges to the QoS given by transmission control protocol (TCP). the paper proposes a Diff-selective(diff-sel) policy, which can solve the problem by selecting different...
IF amplifier is the key component part between analog module and digital module in laser radar system. IF amplifier performance affects directly the signal to noise ratio, image quality and detection range of imaging laser radar system. In this paper, we design and develop IF amplifier. Also, we do the optimal analysis basing on the electronic tracking devices-the-loop simulation platform (ETDLSP)...
In this paper, the design of a new-style instrumentation amplifier based on chopper-stabilized technology is reported. It consists of a low power operational amplifier with TCMC structure, modulating and demodulating circuits with two switches and low-pass filter module which could reduce flicker noise of instrumentation amplifier effectively. By analysis and optimization of the parasitic effects...
In this paper, the optimized routing or relay selection is discussed for the Cooperative Communication wireless networks. The whole network system performance or Quality of Service (QoS) can not be achieved without the optimal selection of the relay nodes. For this paper, the network performance is analyzed for m number of relays for n number of source nodes. The simulation results are measured by...
A computational is a wide-area computing environment for cross-domain resource sharing and service integration. Most clouds generally emphasize sharing resources and services on demand, the scheduling strategy based on selecting resource that are near and owns more bandwidth available has better characteristics. The notion of game theory is proposed in this paper, which can be used as the criteria...
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