Recently,Quality of Experience(QoE)has been introduced as a subjective measure of a user’s experience of communication services.QoE was expected to take the place of traditional Quality of Service(QoS)measure in that...Recently,Quality of Experience(QoE)has been introduced as a subjective measure of a user’s experience of communication services.QoE was expected to take the place of traditional Quality of Service(QoS)measure in that QoE may express a direct and accurate user experience.In this paper,we propose a QoE management scheme which is based on a user’s simple feedback.We explain the proposed QoE management steps and the dominant reason extraction algorithm to determine the quality-falling instance.We also present a QoE prediction method that will provide an optimal quality management scheme in communication services.Experiments on multimedia streaming service prove the efficiency of the dominant factor extraction algorithm,and the experiment using the QoE prediction method present a very high accuracy.The QoE management scheme proposed in this paper can be generally adapted to any communication services,to increase the efficiency and effectiveness of quality management systems.展开更多
This paper proposes a novel session setup mechanism in IMS(IP Multimedia Subsystem) by introducing the functional entity termed VSS(Visitor Subscriber Server) which is used to provide registration and location managem...This paper proposes a novel session setup mechanism in IMS(IP Multimedia Subsystem) by introducing the functional entity termed VSS(Visitor Subscriber Server) which is used to provide registration and location management.The new mechanism aims at improving session setup procedure by a betterment of location management in IMS.Through the use of two-tier subscriber information database constituted by the HSS(Home Subscriber Server) and the VSS, the new mechanism seperates the registration procedure and location management from the S-CSCF(Serving-Call'Session Control Function), and makes them be handled by the VSS.At the same time, the new mechanism updates the signaling procedure of registration and session setup.With VSS based location management, the cost of registeration and session setup procedure as well as the delay of session setup procedure become lower.The cost and delay functions of the new session setup mechanism as well as the cost function of new registeration are deduced.Then, simulations and analysis verify that the performance of this new mechanism gets the benefit in cost and time.展开更多
Organizations implement an information security program for the protection of their information assets. The success of such a program depends primarily on the effective implementation and execution of associated infor...Organizations implement an information security program for the protection of their information assets. The success of such a program depends primarily on the effective implementation and execution of associated information security policies and controls. These policies and controls depend directly upon the resultant behavior and actions of end-users. Hence, end-users play a critical role in the effective implementation and running of an information security program in any organization. However, end-users are often unable to navigate and comprehend the various policies, controls and associated issues. Support to end-users is therefore a vital element, but is often neglected by present information security management systems. In the service industry, support to customers is established as an important determinant of customer perceived service quality. This paper applies the same philosophy to provide support to end-users, who are the customers of the Information Security Service.展开更多
The paper takes embedded Web server as control core, realizes the multi sensor data and control interface dynamic transmission combine with CGI technology., The user remote access to the embedded Web server by Interne...The paper takes embedded Web server as control core, realizes the multi sensor data and control interface dynamic transmission combine with CGI technology., The user remote access to the embedded Web server by Internet, realize the monitoring of greenhouse environment paramelers and control by Web browser user. The system ensures accurate detection and real-time control of the greenhouse environmen! factor, that can provide a suitable environment for the growth of greenhouse crops.展开更多
基金supported by the Ministry of Knowledge Economy (MKE), Korea, under the Convergence Information Technology Research Center (CITRC) support program, under Grant No. NIPA-2012-H0401-12-1002supervised by the National IT Industry Promotion Agency (NIPA)
文摘Recently,Quality of Experience(QoE)has been introduced as a subjective measure of a user’s experience of communication services.QoE was expected to take the place of traditional Quality of Service(QoS)measure in that QoE may express a direct and accurate user experience.In this paper,we propose a QoE management scheme which is based on a user’s simple feedback.We explain the proposed QoE management steps and the dominant reason extraction algorithm to determine the quality-falling instance.We also present a QoE prediction method that will provide an optimal quality management scheme in communication services.Experiments on multimedia streaming service prove the efficiency of the dominant factor extraction algorithm,and the experiment using the QoE prediction method present a very high accuracy.The QoE management scheme proposed in this paper can be generally adapted to any communication services,to increase the efficiency and effectiveness of quality management systems.
基金National Science Fund for Distin-guished Young Scholars (No. 60525110)National 973 Program (No. 2007CB307100, 2007CB307103)+1 种基金Program for New Century Excellent Talents in University (No.NCET-04-0111)Development Fund Project for Electronic and Information Industry (Mobile Service and Application System Based on 3G)
文摘This paper proposes a novel session setup mechanism in IMS(IP Multimedia Subsystem) by introducing the functional entity termed VSS(Visitor Subscriber Server) which is used to provide registration and location management.The new mechanism aims at improving session setup procedure by a betterment of location management in IMS.Through the use of two-tier subscriber information database constituted by the HSS(Home Subscriber Server) and the VSS, the new mechanism seperates the registration procedure and location management from the S-CSCF(Serving-Call'Session Control Function), and makes them be handled by the VSS.At the same time, the new mechanism updates the signaling procedure of registration and session setup.With VSS based location management, the cost of registeration and session setup procedure as well as the delay of session setup procedure become lower.The cost and delay functions of the new session setup mechanism as well as the cost function of new registeration are deduced.Then, simulations and analysis verify that the performance of this new mechanism gets the benefit in cost and time.
文摘Organizations implement an information security program for the protection of their information assets. The success of such a program depends primarily on the effective implementation and execution of associated information security policies and controls. These policies and controls depend directly upon the resultant behavior and actions of end-users. Hence, end-users play a critical role in the effective implementation and running of an information security program in any organization. However, end-users are often unable to navigate and comprehend the various policies, controls and associated issues. Support to end-users is therefore a vital element, but is often neglected by present information security management systems. In the service industry, support to customers is established as an important determinant of customer perceived service quality. This paper applies the same philosophy to provide support to end-users, who are the customers of the Information Security Service.
文摘The paper takes embedded Web server as control core, realizes the multi sensor data and control interface dynamic transmission combine with CGI technology., The user remote access to the embedded Web server by Internet, realize the monitoring of greenhouse environment paramelers and control by Web browser user. The system ensures accurate detection and real-time control of the greenhouse environmen! factor, that can provide a suitable environment for the growth of greenhouse crops.
