A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system con...A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system confirm low optical loss and environmental stabilities.展开更多
The planning of wireless communication networks in underdeveloped countries is studied for landline telephone, fixed broadband wireless access and PLMN systems via investigation and discussion of the LDC networks＇ ch...The planning of wireless communication networks in underdeveloped countries is studied for landline telephone, fixed broadband wireless access and PLMN systems via investigation and discussion of the LDC networks＇ characteristic, technology selection, deployment consideration, network configuring, civil work evaluation and investment estimation. An example is embedded all through providing a general展开更多
The multiple access fashion is a new resolution for the star-type local area network (LAN) access control and star-type optical fibre LAN. Arguments about this network are discussed, and the results are introduced.
在互联网时代的宏观背景下,需要了解基于IP无线接入网(IP Radio Access Network,IPRAN)的主要作用。在本地网组网技术模式研究中,可以利用分组传输的数据值,通过设备实现基站业务回传和专线业务综合接入。IPRAN有极高的便捷性和兼容性,5...在互联网时代的宏观背景下,需要了解基于IP无线接入网(IP Radio Access Network,IPRAN)的主要作用。在本地网组网技术模式研究中,可以利用分组传输的数据值,通过设备实现基站业务回传和专线业务综合接入。IPRAN有极高的便捷性和兼容性,5G综合业务接入网IPRAN是未来的重要发展趋势,具有高品质、多点化服务特征。在承载需求上,从长期演进(Long Term Evolution,LTE)角度出发,依托区域骨干网对IPRAN组网各设备的构建和组网需求进行分析,实现综合业务接入网IPRAN的本地网组网技术模式的规划完善。展开更多
为了增强煤矿井下安全生产、抢险救灾的能力和提高管理效率,基于数字矿山综合无线局域网络系统设计了煤矿井下无线导航系统。通过利用井下接入点设备(Access Point,AP)的基本服务集识别码和导航设备接收到的信号强度指示进行导航系统内...为了增强煤矿井下安全生产、抢险救灾的能力和提高管理效率,基于数字矿山综合无线局域网络系统设计了煤矿井下无线导航系统。通过利用井下接入点设备(Access Point,AP)的基本服务集识别码和导航设备接收到的信号强度指示进行导航系统内人员与设备的定位。利用嵌入式地理信息系统eSuperMap开发平台和WinCE嵌入式操作系统,在定位的基础上实现对煤矿井下作业人员和流动设备的导航。开发了电子地图操作、信息查询、路径分析、导航等功能,并在Pocket PC 2003模拟器上进行了模拟演示,表明了该系统的可行性。这些工作为煤矿井下无线导航系统的进一步开发打下了重要技术基础。展开更多
This paper presents an overview of a new very high throughput millimeterwave WLAN system operating at 45 GHz band. We begin by reviewing standards process of IEEE 802.11aj(45GHz). Then the frequency spectrum allocatio...This paper presents an overview of a new very high throughput millimeterwave WLAN system operating at 45 GHz band. We begin by reviewing standards process of IEEE 802.11aj(45GHz). Then the frequency spectrum allocation at 45 GHz band is introduced. Next, the channel measurement and mod-eling is given. Specifically, the millimeter-wave MIMO for physical layer enhancement is given in detail.展开更多
Wireless Network rapid development and use present more high security request for constantly extensivenetwork system. By analyzing existing wireless LAN safety measure at this paper proposes and realizes overall infor...Wireless Network rapid development and use present more high security request for constantly extensivenetwork system. By analyzing existing wireless LAN safety measure at this paper proposes and realizes overall infor-mation safe protection solution ,strengthens the security of the communication data in the wireless LAN greatly.展开更多
基金This research is supported by a grant from FUTABA DENSHI foundation.
文摘A high-speed and economical optical local access network system is proposed where bi-directional polarization multiplexing is applied to a bi-directional transmission. Experimental results using a prototype system confirm low optical loss and environmental stabilities.
文摘The planning of wireless communication networks in underdeveloped countries is studied for landline telephone, fixed broadband wireless access and PLMN systems via investigation and discussion of the LDC networks＇ characteristic, technology selection, deployment consideration, network configuring, civil work evaluation and investment estimation. An example is embedded all through providing a general
文摘The multiple access fashion is a new resolution for the star-type local area network (LAN) access control and star-type optical fibre LAN. Arguments about this network are discussed, and the results are introduced.
文摘在互联网时代的宏观背景下,需要了解基于IP无线接入网(IP Radio Access Network,IPRAN)的主要作用。在本地网组网技术模式研究中,可以利用分组传输的数据值,通过设备实现基站业务回传和专线业务综合接入。IPRAN有极高的便捷性和兼容性,5G综合业务接入网IPRAN是未来的重要发展趋势,具有高品质、多点化服务特征。在承载需求上,从长期演进(Long Term Evolution,LTE)角度出发,依托区域骨干网对IPRAN组网各设备的构建和组网需求进行分析,实现综合业务接入网IPRAN的本地网组网技术模式的规划完善。
文摘为了增强煤矿井下安全生产、抢险救灾的能力和提高管理效率,基于数字矿山综合无线局域网络系统设计了煤矿井下无线导航系统。通过利用井下接入点设备(Access Point,AP)的基本服务集识别码和导航设备接收到的信号强度指示进行导航系统内人员与设备的定位。利用嵌入式地理信息系统eSuperMap开发平台和WinCE嵌入式操作系统,在定位的基础上实现对煤矿井下作业人员和流动设备的导航。开发了电子地图操作、信息查询、路径分析、导航等功能,并在Pocket PC 2003模拟器上进行了模拟演示,表明了该系统的可行性。这些工作为煤矿井下无线导航系统的进一步开发打下了重要技术基础。
基金supported in part by National Key Basic Research Program of China (973 Program) under Grant No. 2013CB329002National Natural Science Foundation of China under Grant No. 61132003the Natural Science Foundation of Jiangsu Province of China under Grants BK2011019 and BK20130631
文摘This paper presents an overview of a new very high throughput millimeterwave WLAN system operating at 45 GHz band. We begin by reviewing standards process of IEEE 802.11aj(45GHz). Then the frequency spectrum allocation at 45 GHz band is introduced. Next, the channel measurement and mod-eling is given. Specifically, the millimeter-wave MIMO for physical layer enhancement is given in detail.
文摘Wireless Network rapid development and use present more high security request for constantly extensivenetwork system. By analyzing existing wireless LAN safety measure at this paper proposes and realizes overall infor-mation safe protection solution ,strengthens the security of the communication data in the wireless LAN greatly.
