共查询到20条相似文献,搜索用时 46 毫秒
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本文对目前国际上小范围无线通信的主要成果作了介绍,并对以无线局域网(WLAN,Wireless Local Area Network)为典型应用的IEEE802.11x,蓝牙(BT、Bluetooth)SIG制定的小范围无线应用标准“蓝牙系统”、HomeRF、HIPERLAN2等作了分析比较。 相似文献
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WLAN的标准与技术发展 总被引:8,自引:1,他引:7
文章从IEEE802.11X、HiperLAN、HomeRF、蓝牙等方面介绍了无线局域网标准,并对无线局域网的安全问题进行了重点讨论,最后介绍了中国在无线局域网领域的标准化情况。 相似文献
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阐述了无线局域网的四种互联方式:网桥连接型、基站接入型、HUB接入型及无中心结构,对802.11标准、蓝牙、HomeRF和IrDA四种无线局域网的协议标准进行了分析,揭示了无线局域网的安全隐患,对无线局域网的优势和劣势进行了细致的分析。 相似文献
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文章首先介绍了新一代无线/射频测试设备及测试方法,最后对为该设备开发的符合蓝牙技术和IEEE802.11无线局域网标准的测试程序做了阐述。 相似文献
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目前无线局域网技术已经迅速发展成为计算机网络中一个至关重要的组成部分,因而采用何种无线局域网技术标准就显得尤为重要。本文着重介绍几种WLAN技术标准,包括802.11系列,HomeRF,HiperLAN2以及蓝牙技术,并且分析了各自的优劣。 相似文献
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无线局域网标准的最新发展 总被引:4,自引:0,他引:4
目前,曾经火爆一时的无线通信并不一帆风顺,蓝牙、3G都不同程度受到了挫折,或者是比预期发展得缓慢或者是商用时间被迫推迟。只有无线局域网技术一枝独秀。最早的无线局域网主要用在仓库和工厂里,而现在却安装在办公室、住宅,甚至是公共场所。人们熟知的无线局域网的标准是IEEE802.11b(也称作Wi-Fi或无线以太网),现在,IEEE又制定了新的802.11a和802.11g标准,希望能够提高传输速率以便可以和铜线甚至光纤抗衡。但是IEEE的802.11系列的802.11b、802.11a、802.11g这三个标准都存在着安全问题。IEEE将推出一些补充的标准来解… 相似文献
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The next three years will see the introduction of packet data offerings on GSM. There will also be the emergence of new radio coding schemes to bring data rates up to 50 kbit/s. The introduction of 3rd Generation networks bringing the capability to deliver 500 kbit/s to the wide area will also be seen. For higher data rates closer to that of fixed networks (500 kbit/s to 16 Mbit/s), cordless technologies such as Bluetooth, DECT or HIPERLAN are evolving. Applications are currently limited to home or corporate use but with the right development these technologies could become suitable alternatives to the cellular network where very high data rates are needed. Additionally, the market for wireless systems offering a direct replacement to fixed wired access is exploding. Systems offering anything from 64 kbit/s to 50 Mbit/s are available and offer new entrants the potential to rapidly and economically establish direct access to their customers. Will this be the take-up of wireless data at last? This paper explores the scenarios that these technologies bring to the marketplace and how they will be making a difference. Wireless access has finally come of age. 相似文献
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C W Blanchard 《BT Technology Journal》2001,19(3):67-75
This paper describes the security features incorporated into the third generation (3G) mobile system developed in 3GPP, specifically the enhancements to the shared secret symmetric authentication scheme as used in GSM. The proposed security architecture for the Internet multimedia subsystem (IMS) based on and built upon Internet applications, services and protocols, is then described. Finally, the paper describes some early work by 3GPP to integrate public key security mechanisms into 3G, while maintaining the global reach and call set-up performance, that mobile users now take for granted. 相似文献