介绍了iDEN(integrated Digital Enhanced Network)专网的VSELP语音压缩编码、M-16QAM调制等关键技术特点以及集群调度、数据传输等主要功能,并结合现代物流信息系统的实际需求特性,进行基于iDEN专网的现代物流信息系统总体架构与系统...介绍了iDEN(integrated Digital Enhanced Network)专网的VSELP语音压缩编码、M-16QAM调制等关键技术特点以及集群调度、数据传输等主要功能,并结合现代物流信息系统的实际需求特性,进行基于iDEN专网的现代物流信息系统总体架构与系统功能设计,进而对各子系统具体功能做出详细分解。综合运用基于iDEN的车辆定位、图像监控等技术实现各子系统的主要功能。最后对iDEN专网在深圳市现代物流子系统中的应用情况进行了介绍。展开更多
In recent years there has been a fast grow of various electronic services.Each service requires specif-ic credentials for authenticating and authorizing user ac-cess or specific subset of user's personal informati...In recent years there has been a fast grow of various electronic services.Each service requires specif-ic credentials for authenticating and authorizing user ac-cess or specific subset of user's personal information for transactions the service offers.Such a situation causes problems with remembering multiple,service-specific authentication data,with controlling user's personal data spread across different services-problems with managing user's identities.This paper is an overview on Identity Management(IdM).It introduces basic terms connected with IdM,shows current and emerging appli-cation areas,enumerates the most important IdM activi-ties,describes the most representative identity manage-ment specifications and frameworks and at the end,it points out important problems in identity management which need to be addressed in the near future.展开更多
文摘介绍了iDEN(integrated Digital Enhanced Network)专网的VSELP语音压缩编码、M-16QAM调制等关键技术特点以及集群调度、数据传输等主要功能,并结合现代物流信息系统的实际需求特性,进行基于iDEN专网的现代物流信息系统总体架构与系统功能设计,进而对各子系统具体功能做出详细分解。综合运用基于iDEN的车辆定位、图像监控等技术实现各子系统的主要功能。最后对iDEN专网在深圳市现代物流子系统中的应用情况进行了介绍。
文摘In recent years there has been a fast grow of various electronic services.Each service requires specif-ic credentials for authenticating and authorizing user ac-cess or specific subset of user's personal information for transactions the service offers.Such a situation causes problems with remembering multiple,service-specific authentication data,with controlling user's personal data spread across different services-problems with managing user's identities.This paper is an overview on Identity Management(IdM).It introduces basic terms connected with IdM,shows current and emerging appli-cation areas,enumerates the most important IdM activi-ties,describes the most representative identity manage-ment specifications and frameworks and at the end,it points out important problems in identity management which need to be addressed in the near future.
文摘集群通信系统诞生于20世纪70年代，最早的集群通信是模拟系统，数字集群技术于20世纪90年代中期在全球范围内兴起，90年代末期在中国出现数字集群网络。信息产业部于2000年12月28日发布了我国《数字集群移动通信系统体制》（SJ T11228-2000）标准，这是一项电子行业推荐性的部颁标准，在该标准中确定了TETRA系统和iDEN系统两种体制。其中iDEN（Integrated digital enhanced network）是美国标准，代表厂商是摩托罗拉，主要适用于共用集群通信网。
