GuoguoGan 发表于 2013-9-22 16:49
802点什么什么的怎么分的啊
主要的IEEE 802.11标准: IEEE 802.11a - 54 Mbit/s, 5 GHzstandard (1999, shipping products in 2001) IEEE 802.11b - Enhancements to802.11 to support 5.5 and 11 Mbit/s (1999) IEEE 802.11d - International(country-to-country) roaming extensions (2001) IEEE 802.11e - Enhancements: QoS, including packet bursting (2005) ,以支持语音、视频等多媒体传输。 IEEE802.11f:改善802.11的移动切换机制,为用户提供二层漫游功能。 IEEE 802.11g - 54 Mbit/s, 2.4 GHzstandard (backwards compatible with b) (2003) IEEE 802.11h - Spectrum Managed802.11a (5 GHz) for European compatibility (2004) IEEE 802.11i - Enhanced security(2004),对WLAN鉴权和加密的安全性进行了增强,采用802.1x认证协议、AES加密、改进密钥分布架构。 IEEE 802.11j - Extensions for Japan(2004) IEEE 802.11k - Radio resourcemeasurement enhancements (2008) IEEE 802.11n - Higher throughputimprovements using MIMO (multiple input, multiple output antennas) (November2009) IEEE 802.11p - WAVE - WirelessAccess for the Vehicular Environment (such as ambulances and passenger cars)(working - 2009?) IEEE 802.11r - Fast roaming Working"Task Group r" - (2008) ,加强漫游的性能,以实现基于无线数据和无线语音的快速漫游。 IEEE 802.11s - Mesh Networking,Extended Service Set (ESS) (working - Jul. 2010?) ,使802.11实现网状网(MESH)应用。 IEEE 802.11T - Wireless PerformancePrediction (WPP) - test methods and metrics Recommendation (2008) IEEE 802.11y - 3650-3700 MHzOperation in the U.S. (2008) |