移动数据分流(Mobile Data Offloading)是近年来一个比较新的研究热点。为了解决用户日益增长的移动数据需求给蜂窝网络运营商造成的流量负载和网络拥塞等问题,移动数据分流被提出来,即将蜂窝网络的数据分流到无处不在的用户间本地机会...移动数据分流(Mobile Data Offloading)是近年来一个比较新的研究热点。为了解决用户日益增长的移动数据需求给蜂窝网络运营商造成的流量负载和网络拥塞等问题,移动数据分流被提出来,即将蜂窝网络的数据分流到无处不在的用户间本地机会通信。其基本思想是通过蜂窝网络分发数据对象到一部分订阅用户(称为种子用户),再由种子用户通过本地机会通信(如Bluetooth、WiFi Direct、DSRC、Device-to-Device in LTE等)或基于WiFi AP辅助的方式传送给其他订阅的用户。首先从总体上概述了当前对数据分流研究的背景、意义和具体的研究进展。然后针对当前国内外学术界对这方面的研究内容和趋势,按照形式和技术路线对数据分流的方案进行了归类,并对各种类型的分流方案进行了综述。最后结合现实环境进行总结。展开更多
Location privacy has been a serious concern for mobile users who use location-based services provided by third-party providers via mobile networks. Recently, there have been tremendous efforts on developing new anonym...Location privacy has been a serious concern for mobile users who use location-based services provided by third-party providers via mobile networks. Recently, there have been tremendous efforts on developing new anonymity or obfuscation techniques to protect location privacy of mobile users. Though effective in certain scenarios, these existing techniques usually assume that a user has a constant privacy requirement along spatial and/or temporal dimensions, which may be not true in real-life scenarios. In this paper, we introduce a new location privacy problem： Location-aware Location Privacy Protection （L2P2） problem, where users can define dynamic and diverse privacy requirements for different locations. The goal of the L2P2 problem is to find the smallest cloaking area for each location request so that diverse privacy requirements over spatial and/or temporal dimensions are satisfied for each user. In this paper, we formalize two versions of the L2P2 problem, and propose several efficient heuristics to provide such location-aware location privacy protection for mobile users. Through extensive simulations over large synthetic and real-life datasets, we confirm the effectiveness and efficiency of the proposed L2P2 algorithms.展开更多
The concept on integrated intelligent network is presented through combining intelligent networks with fixed networks,mobile netwlrks and IP netwlrks.The solution to GPRS prepaid services is provided,and the key techn...The concept on integrated intelligent network is presented through combining intelligent networks with fixed networks,mobile netwlrks and IP netwlrks.The solution to GPRS prepaid services is provided,and the key technology on this solution is studied.Finally,the executive process of GPRS prepaid service is shown by and instance.展开更多
文摘移动数据分流(Mobile Data Offloading)是近年来一个比较新的研究热点。为了解决用户日益增长的移动数据需求给蜂窝网络运营商造成的流量负载和网络拥塞等问题,移动数据分流被提出来,即将蜂窝网络的数据分流到无处不在的用户间本地机会通信。其基本思想是通过蜂窝网络分发数据对象到一部分订阅用户(称为种子用户),再由种子用户通过本地机会通信(如Bluetooth、WiFi Direct、DSRC、Device-to-Device in LTE等)或基于WiFi AP辅助的方式传送给其他订阅的用户。首先从总体上概述了当前对数据分流研究的背景、意义和具体的研究进展。然后针对当前国内外学术界对这方面的研究内容和趋势,按照形式和技术路线对数据分流的方案进行了归类,并对各种类型的分流方案进行了综述。最后结合现实环境进行总结。
基金supported by the National Natural Science Foundation of China (Nos.61370192,61432015,61428203,and 61572347)the US National Science Foundation (Nos.CNS-1319915 and CNS-1343355)
文摘Location privacy has been a serious concern for mobile users who use location-based services provided by third-party providers via mobile networks. Recently, there have been tremendous efforts on developing new anonymity or obfuscation techniques to protect location privacy of mobile users. Though effective in certain scenarios, these existing techniques usually assume that a user has a constant privacy requirement along spatial and/or temporal dimensions, which may be not true in real-life scenarios. In this paper, we introduce a new location privacy problem： Location-aware Location Privacy Protection （L2P2） problem, where users can define dynamic and diverse privacy requirements for different locations. The goal of the L2P2 problem is to find the smallest cloaking area for each location request so that diverse privacy requirements over spatial and/or temporal dimensions are satisfied for each user. In this paper, we formalize two versions of the L2P2 problem, and propose several efficient heuristics to provide such location-aware location privacy protection for mobile users. Through extensive simulations over large synthetic and real-life datasets, we confirm the effectiveness and efficiency of the proposed L2P2 algorithms.
文摘The concept on integrated intelligent network is presented through combining intelligent networks with fixed networks,mobile netwlrks and IP netwlrks.The solution to GPRS prepaid services is provided,and the key technology on this solution is studied.Finally,the executive process of GPRS prepaid service is shown by and instance.
