Orange Business Services（简称Orange）于Gartner亚太区网络服务供应商魔力象限（Magic Quadrant）报告内，位列领导者象限。该报告指亚太区市场“正朝向连接以外的领域逐步前进，大部分供应商提供一系列代管服务，包括广域网管理及...Orange Business Services（简称Orange）于Gartner亚太区网络服务供应商魔力象限（Magic Quadrant）报告内，位列领导者象限。该报告指亚太区市场“正朝向连接以外的领域逐步前进，大部分供应商提供一系列代管服务，包括广域网管理及优化、IP电话、网络安全及视频会议。大部份代管服务相对较新，但由于网络技术发展，因此在功能和效能上正迅速改善，将有助带动需求。”展开更多
Technology Business Research（TBR）的研究报告显示：2007年阿尔卡特朗讯的服务业务在关键市场领域中所占的市场份额位列第二。
阿尔卡特朗讯的目标是成为通信行业最大的全球网络服务供应商，因为客户需要像他们这样兼具IT经验和网...Technology Business Research（TBR）的研究报告显示：2007年阿尔卡特朗讯的服务业务在关键市场领域中所占的市场份额位列第二。
阿尔卡特朗讯的目标是成为通信行业最大的全球网络服务供应商，因为客户需要像他们这样兼具IT经验和网络技术的‘网络集成商’。展开更多
For most current Web Service access control methods, Web Service providers create a series of access control roles based on specified attributes. Only by meeting all the roles can a subject obtain the access to necess...For most current Web Service access control methods, Web Service providers create a series of access control roles based on specified attributes. Only by meeting all the roles can a subject obtain the access to necessary operations and resources. However, because of the dynamic and open traits of Web Services, it is difficult for Web Service providers to work out an access control policy with moderate intensity and to realize a satisfactory balance between protecting the security of resources and maintaining the service reachable rate. To provide a solution to the above problem, this paper proposed a trust compensation access control method based on the Attribute-Based Access Control model. Our main contributions include a formal description of the access control method, a method to calculate the attribute trust degree based on time decay, and the trust compensation value of the attribute trust degree, as well as a new Service Oriented Architecture （SOA） architecture and its procedures based on a detailed trust compensation access control method.展开更多
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
文摘Orange Business Services（简称Orange）于Gartner亚太区网络服务供应商魔力象限（Magic Quadrant）报告内，位列领导者象限。该报告指亚太区市场“正朝向连接以外的领域逐步前进，大部分供应商提供一系列代管服务，包括广域网管理及优化、IP电话、网络安全及视频会议。大部份代管服务相对较新，但由于网络技术发展，因此在功能和效能上正迅速改善，将有助带动需求。”
文摘For most current Web Service access control methods, Web Service providers create a series of access control roles based on specified attributes. Only by meeting all the roles can a subject obtain the access to necessary operations and resources. However, because of the dynamic and open traits of Web Services, it is difficult for Web Service providers to work out an access control policy with moderate intensity and to realize a satisfactory balance between protecting the security of resources and maintaining the service reachable rate. To provide a solution to the above problem, this paper proposed a trust compensation access control method based on the Attribute-Based Access Control model. Our main contributions include a formal description of the access control method, a method to calculate the attribute trust degree based on time decay, and the trust compensation value of the attribute trust degree, as well as a new Service Oriented Architecture （SOA） architecture and its procedures based on a detailed trust compensation access control method.
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.
