It is wise for fixed operators to make use of broadband wireless access technologies,such as IEEE802.16d,to develop mobile access based on their existing fixed broadband IP networks.Mobile operators have to evolve the...It is wise for fixed operators to make use of broadband wireless access technologies,such as IEEE802.16d,to develop mobile access based on their existing fixed broadband IP networks.Mobile operators have to evolve their networks from 2G to 3G for making full use of their current resources. However,the AII-IP core network will be a general trend since broadband wireless access adopts the connectionless statistical packet multiplexing technology.Based on the introduction of IEEE802.16d,High Speed Downlink Packet Access (HSDPA) and CDMA2000 1x EV-DV technologies,this paper discusses the development trend of broadband wireless access technologies, and concludes that 3G's packet access technologies are the same as IEEE802.16d/e,and AII-IP is the goal.It emphasizes that Chinese TD-SCDMA should develop toward connectionless statistical packet multiplexing as early as possible.展开更多
针对农业现场偏远分散、要素复杂、受气候约束操作和管理困难等特点,提出基于3G无线通信技术的智能农业远程监控与管理设计方案;该方案利用3G无线通信技术搭建远程农业监控网络,系统采用分布式结构,每个管理区域均以PLC为核心设计3G采...针对农业现场偏远分散、要素复杂、受气候约束操作和管理困难等特点,提出基于3G无线通信技术的智能农业远程监控与管理设计方案;该方案利用3G无线通信技术搭建远程农业监控网络,系统采用分布式结构,每个管理区域均以PLC为核心设计3G采集控制器,数据连接至3G运营商,并架设APN(Access Point Name)专线与监控中心通信,通过运行智能监控软件实现对农业现场的无线远程监控与管理;实践表明,该系统克服了以往农业监控中的弊端,架设了为企业、管理部门、经销商获取农业生产情况的崭新平台,提高了现代农业管理效率。展开更多
文摘It is wise for fixed operators to make use of broadband wireless access technologies,such as IEEE802.16d,to develop mobile access based on their existing fixed broadband IP networks.Mobile operators have to evolve their networks from 2G to 3G for making full use of their current resources. However,the AII-IP core network will be a general trend since broadband wireless access adopts the connectionless statistical packet multiplexing technology.Based on the introduction of IEEE802.16d,High Speed Downlink Packet Access (HSDPA) and CDMA2000 1x EV-DV technologies,this paper discusses the development trend of broadband wireless access technologies, and concludes that 3G's packet access technologies are the same as IEEE802.16d/e,and AII-IP is the goal.It emphasizes that Chinese TD-SCDMA should develop toward connectionless statistical packet multiplexing as early as possible.
文摘针对农业现场偏远分散、要素复杂、受气候约束操作和管理困难等特点,提出基于3G无线通信技术的智能农业远程监控与管理设计方案;该方案利用3G无线通信技术搭建远程农业监控网络,系统采用分布式结构,每个管理区域均以PLC为核心设计3G采集控制器,数据连接至3G运营商,并架设APN(Access Point Name)专线与监控中心通信,通过运行智能监控软件实现对农业现场的无线远程监控与管理;实践表明,该系统克服了以往农业监控中的弊端,架设了为企业、管理部门、经销商获取农业生产情况的崭新平台,提高了现代农业管理效率。
