Providing different service priority levels for different kinds of traffic is an important research area in the Internet.As compared with the existing best-effort(BE)service,recent researchers consider devising the be...Providing different service priority levels for different kinds of traffic is an important research area in the Internet.As compared with the existing best-effort(BE)service,recent researchers consider devising the belowbest-effort algorithm to realize a low priority service.The aim of below-best-effort service is to use the available bandwidth as much as possible in the premise of not interfering standard best-effort flows.With the best-effort transmission control protocol(TCP)transporting foreground traffic,below-best-effort service can transport background traffic which users do not urgently need to use.In this paper,we review the evolution of below-besteffort service and classify and compare these below-besteffort schemes.We also present some open problems in the research of below-best-effort service and point out the future work.展开更多
Quality of experience（QoE） has been one of the most important factors for service providers and operators to develop and deploy services. Previous works have shown that Weber-Fechner law（WFL） can be used to promot...Quality of experience（QoE） has been one of the most important factors for service providers and operators to develop and deploy services. Previous works have shown that Weber-Fechner law（WFL） can be used to promote the accuracy of best-effort（BE） services＇ QoE assessment. In this paper, based on WFL, we take a deep insight into the visual information of BE services and its role in WFL, especially in web browsing services, and propose an enhanced QoE assessment model for BE services by taking the visual information into account. Both images and texts visual information are extracted and combined to get the visual information for web pages. Finally, a subjective experiment is performed to validate performance of proposed QoE assessment model, which shows that it performs better than traditional WFL based model.展开更多
基金supported by the National Natural Science Foundation of China (Grant No.60502037)the Specialized Research Fund for the Doctoral Program of Higher Education of China (No.200800131019)+1 种基金Program for New Century Excellent Talents in University (No.NECT-07-0109)the National High Technology Research and Development Program of China (No.2007AA01Z206).
文摘Providing different service priority levels for different kinds of traffic is an important research area in the Internet.As compared with the existing best-effort(BE)service,recent researchers consider devising the belowbest-effort algorithm to realize a low priority service.The aim of below-best-effort service is to use the available bandwidth as much as possible in the premise of not interfering standard best-effort flows.With the best-effort transmission control protocol(TCP)transporting foreground traffic,below-best-effort service can transport background traffic which users do not urgently need to use.In this paper,we review the evolution of below-besteffort service and classify and compare these below-besteffort schemes.We also present some open problems in the research of below-best-effort service and point out the future work.
基金supported by the Beijing Municipal Science and Technology Commission Research Fund Project (D151100000115002 )the Ministry of Education. CMCC Research fund (MCM20130132)
文摘Quality of experience（QoE） has been one of the most important factors for service providers and operators to develop and deploy services. Previous works have shown that Weber-Fechner law（WFL） can be used to promote the accuracy of best-effort（BE） services＇ QoE assessment. In this paper, based on WFL, we take a deep insight into the visual information of BE services and its role in WFL, especially in web browsing services, and propose an enhanced QoE assessment model for BE services by taking the visual information into account. Both images and texts visual information are extracted and combined to get the visual information for web pages. Finally, a subjective experiment is performed to validate performance of proposed QoE assessment model, which shows that it performs better than traditional WFL based model.
