IEEE 802.11af, also referred to as White-Fi and Super Wi-Fi, [1] [2] is a wireless computer networking standard in the 802.11 family, that allows wireless local area network (WLAN) operation in TV white space spectrum in the VHF and UHF bands between 54 and 790 MHz. [3] The standard was approved in February 2014. [4] Cognitive radio technology is used to transmit on unused portions of TV ...

IEEE 802.11af，又稱為White WiFi、Super WiFi [1] ，是802.11家族的一項無線網路標準，由IEEE標準協會制定。 該標準透過電視 白頻段 來傳播無線網路訊號，同時使用該頻段作為訊號傳播的無線訊號標準尚有 IEEE 802.22 [ 2 ] 。

2021年9月11日 · IEEE 802.11af is a wireless networking standard that is designed for low-power, long-range wireless local area network (WLAN) operation for smart homes and IoT devices. It operates in the TV white space (TVWS) frequency range, employing unused TV spectrum at frequencies between 54 to 790 MHz for short periods of time. 802.11af utilizes cognitive radio techniques to provide an indoor range of a ...

2024年10月21日 · 但它也同时存在了无法广泛部署的特定原因。我们今天就来了解一下802.11af。 01、802.11af的频段和覆盖范围. 802.11af所使用的频谱是非常有趣的，它是在电视空白频谱（TVWS：TV white space）频率范围内工作，这也是它的学名TVHT的由来。什么意思呢？

802.11af-2013 - IEEE Standard for Information technology - Telecommunications and information exchange between systems - Local and metropolitan area networks - Specific requirements - Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications Amendment 5: Television White Spaces (TVWS) Operation.

802.11af 的物理层. 802.11af 中的物理 (phy) 层基于正交频分复用 (ofdm)。802.11af 增强了 802.11 wlan phy 以支持在 vhf 和 uhf 频段的 tv 白色空间 (tvws) 频谱中的操作。它引入了一种新的电视超高吞吐量 (tvht) phy，以适应 tvws 频谱中可用的窄电视频道。 除了 ofdm，802.11af 还使用 ...

IEEE 802.11AF ARCHITECTURE In this section we introduce the entities that form an 802.11af network and present the non-regulatory specific roles these elements execute. Geolocation Database — The primary ele-ment, and what mainly differentiates the IEEE 802.11af operation from other 802.11 standards, is the geolocation database (GDB). The GDB is

This 802.11af tutorial covers White-Fi basics, 802.11af features, physical layer and benefits of White-Fi technology. Introduction. The frequency spectrum has been allocated for two types of services viz. licensed and unlicensed. Day by day use of wireless spectrum is becoming more and more due to advancement of wireless technologies and standards.

802.11af 所使用的无线类比电视白频段实际频率需参照各国实际释出频段为准。 美国：使用由FCC规范的VHF、UHF频段， 54Mhz - 698Mhz [8]; 欧洲：使用由ETSI规范的 490Mhz - 790Mhz [8]; 中华民国：交通部目前已收回并腾空无线类比电视频段，但目前均保留或用于行动通讯，并未有已知的 802.11af 可用频段 [9] 。

802.11ah标准的目标应用场景包括传感器和智能抄表，传感器和智能抄表回传链路，WiFi覆盖扩展。 802.11af—— White-Fi. IEEE 802.11af (White-Fi)和IEEE 802.11ah(HaLow)均使用先前授权的频谱，并且不会干扰2.4 GHz和5 GHz频带中的传统Wi-Fi信号，也不会干扰2G和3G蜂窝网络。部分 …