些无线链路标准 200 802.11n 54 80211ag 802.11a, g point-to-point 5-11 802.11b 4G: LTWE WIMAX 4 3G:UMTS/CDMA-HSPDA,CDMA2000-1XEVDO 180215 384 2.5G: UMTS/CDMA CDMA2000 056 2G: S-95 CDMA GSM Indoor Outdoor Mid-range Long-range 10-30m 50-200m outdoor outdoor 200m-4Km 5Km -20 Km Wireless. Mobile Networks 6-7Wireless, Mobile Networks 6-7 一些无线链路标准 Indoor 10-30m Outdoor 50-200m Mid-range outdoor 200m – 4 Km Long-range outdoor 5Km – 20 Km .056 .384 1 4 5-11 54 2G: IS-95, CDMA, GSM 2.5G: UMTS/WCDMA, CDMA2000 802.15 802.11b 802.11a,g 3G: UMTS/WCDMA-HSPDA, CDMA2000-1xEVDO 4G: LTWE WIMAX 802.11a,g point-to-point 200 802.11n Data rate (Mbps)