Understanding the dynamic traffic and usage characteristics of data services in cellular networks is important for optimising network resources and improving user experience.Recent studies have illustrated traffic cha...Understanding the dynamic traffic and usage characteristics of data services in cellular networks is important for optimising network resources and improving user experience.Recent studies have illustrated traffic characteristics from specific perspectives,such as user behaviour,device type,and applications.In this paper,we present the results of our study from a different perspective,namely service providers,to reveal the traffic characteristics of cellular data networks.Our study is based on traffic data collected over a five-day period from a leading mobile operator's core network in China.We propose a Zipf-like model to characterise the distributions of the traffic volume,subscribers,and requests among service providers.Nine distinct diurnal traffic patterns of service providers are identified by formulating and solving a time series clustering problem.Our work differs from previous related works in that we perform measurements on a large quantity of data covering 2.2 billion traffic records,and we first explore the traffic patterns of thousands of service providers.Results of our study present mobile Internet participants with a better understanding of the traffic and usage characteristics of service providers,which play a critical role in the mobile Internet era.展开更多
The Qvod case in 2016, in which the Chinese video-sharing site Qvod was convicted of the crime of disseminating pornographic materials for profits, provoked heated debates regarding the criminal responsibility of inte...The Qvod case in 2016, in which the Chinese video-sharing site Qvod was convicted of the crime of disseminating pornographic materials for profits, provoked heated debates regarding the criminal responsibility of internet service providers （ISPs） in China. Using the Qvod case as an example, this paper first discusses the definition and the legal obligations of ISPs, and argues that we should decide the criminal responsibility of ISPs according to their functions and the content of their services. This paper further analyzes four major issues associated with the criminal responsibility of ISPs, including accomplice responsibility, accessory with neutral conduct, perpetrator by action or omission and ideal concurrence （Idealkonkurrenz）.展开更多
基金supported by the National Natural Science Foundation of China under Grant No.61072061the 111 Project of China under Grant No.B08004the Fundamental Research Funds for the Central Universities under Grant No.2013RC0114
文摘Understanding the dynamic traffic and usage characteristics of data services in cellular networks is important for optimising network resources and improving user experience.Recent studies have illustrated traffic characteristics from specific perspectives,such as user behaviour,device type,and applications.In this paper,we present the results of our study from a different perspective,namely service providers,to reveal the traffic characteristics of cellular data networks.Our study is based on traffic data collected over a five-day period from a leading mobile operator's core network in China.We propose a Zipf-like model to characterise the distributions of the traffic volume,subscribers,and requests among service providers.Nine distinct diurnal traffic patterns of service providers are identified by formulating and solving a time series clustering problem.Our work differs from previous related works in that we perform measurements on a large quantity of data covering 2.2 billion traffic records,and we first explore the traffic patterns of thousands of service providers.Results of our study present mobile Internet participants with a better understanding of the traffic and usage characteristics of service providers,which play a critical role in the mobile Internet era.
文摘The Qvod case in 2016, in which the Chinese video-sharing site Qvod was convicted of the crime of disseminating pornographic materials for profits, provoked heated debates regarding the criminal responsibility of internet service providers （ISPs） in China. Using the Qvod case as an example, this paper first discusses the definition and the legal obligations of ISPs, and argues that we should decide the criminal responsibility of ISPs according to their functions and the content of their services. This paper further analyzes four major issues associated with the criminal responsibility of ISPs, including accomplice responsibility, accessory with neutral conduct, perpetrator by action or omission and ideal concurrence （Idealkonkurrenz）.
