This paper mainly introduces the design and the function structure of VoIP Flow Monitoring system, providing a complete set of monitoring solution. Different with other system, in the process of design, the system foc...
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ISBN:
(纸本)9781622761234
This paper mainly introduces the design and the function structure of VoIP Flow Monitoring system, providing a complete set of monitoring solution. Different with other system, in the process of design, the system focuses on the web based flow analysis module, and illustrates the solution aiming at monitoring and controlling flow. With plenty of search conditions, the web module is flex and users can find out their interested information easily. Finally, with the data in the present network, the system will display how it works on providing information and controlling VoIP flow.
For the demand of analyzing network traffic flows from operators at present, this paper introduces a method of obtaining IP database based on BGP protocol and describes the details of the system deployment. Through an...
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ISBN:
(纸本)9781622761234
For the demand of analyzing network traffic flows from operators at present, this paper introduces a method of obtaining IP database based on BGP protocol and describes the details of the system deployment. Through analyzing the obtained data, it was found that the IP database obtained this way has a high accuracy. And furthermore it has an advantage that is not available in the traditional way based on APNIC + WHOIS--to analyze the transit traffic.
Real-time applications such as video and audio streaming popularly in the public network require the guarantee of Quality of Services(Qo S). But most of the current Qo S routing optimization algorithm such as Ant Colo...
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Real-time applications such as video and audio streaming popularly in the public network require the guarantee of Quality of Services(Qo S). But most of the current Qo S routing optimization algorithm such as Ant Colony Optimization suffered from scalability problem and local optimum problem and was used in the continuous space. So in this paper, Discrete-Mapping Chaotic Ant Swarm Optimization(DM-CASO) is introduced into the Qo S discrete routing area so as to improving Qo S routing performance in the network. This paper firstly establish the multi-constrained QoS routing model, then propose a new path update method in the discrete space through the introduction of discrete mapping, finally introduce the natural selection and mutation ideas to effectively jump out of the local optimum. The simulation results show that the proposed algorithm can solve the problem of finding the optimal path and achieve a better effect in the success rate of finding optimal path.
In this paper, a Best-M feedback scheme using Kalman filter is proposed to reduce the uplink feedback overhead in the presence of feedback delay. Best-M feedback scheme is an effective method to reduce the number of t...
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ISBN:
(纸本)9781618399267
In this paper, a Best-M feedback scheme using Kalman filter is proposed to reduce the uplink feedback overhead in the presence of feedback delay. Best-M feedback scheme is an effective method to reduce the number of the channel quality information (CQI) feedback. However, the CQI feedback after the conventional Best-M decision is inaccurate for base station (BS) scheduling due to the feedback delay and the time varying nature of the channel. A modified limited feedback scheme is proposed to use a Kalman filter to compensate for the performance degradation caused by the feedback delay in Best-M feedback scheme. In the proposed scheme, the user equipment (UE) exploits a Kalman filter to predict the signal to interference plus noise ratio (SINR). Then, the UE makes the Best-M decision based on this predicted SINR and sends the corresponding CQI back to the BS. The simulation results show that the Best-M feedback scheme using Kalman filter, which achieves the same feedback reduction as the conventional scheme, improves the system spectral efficiency.
To analyze model of Web services composition, firstly analyze and abstract dataflow and control construct in OWL-S process to build high level Petri net model, then describe Petri net in Poses++ language, at last simu...
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To analyze model of Web services composition, firstly analyze and abstract dataflow and control construct in OWL-S process to build high level Petri net model, then describe Petri net in Poses++ language, at last simulate Petri net with Poses++ to check data type and deadlock and calculate service performance. The experiment shows that this model analyzing method is able to accomplish type checking and deadlock and performance analyzing.
Existing Web services composition technology, lack of services selecting. A particle swarm optimization algorithm based on the multi-objective optimization strategies was provided to address quality of services to cho...
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Existing Web services composition technology, lack of services selecting. A particle swarm optimization algorithm based on the multi-objective optimization strategies was provided to address quality of services to choose the issue of global optimization. It is to transform Web services select the overall optimization problem with QoS into a multi-objective constrained optimization problem based on Qos, using multi-objective PSO intelligent theory, by a number of Qos parameters optimized at the same time, and ultimately produce a set of constraints to meet the Pareto optimal solution. The experimental results show the feasibility and efficiency of the algorithm.
In order to ensure the correctness and reliability of Web services composition based on OWL-S, verify the interaction protocol of Web services. It is provided that three lay architecture. Composition service based on ...
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In order to ensure the correctness and reliability of Web services composition based on OWL-S, verify the interaction protocol of Web services. It is provided that three lay architecture. Composition service based on OWL-S, GA model is the middle model and the Promela model is the verification model, SPIN as a model validator. The OWL-S composition Web services transform a top-down conversation protocol process into a GA model, use WAST tool into Promela model, the SPIN tool analysis and verification structure and performance of composition services. This method is flexibility and scalability which provide a solution for Web services composition model verification.
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