Wi-Fi technology standard short sleep
The recent development of Wi-Fi technology can be said to be both bail-out and seizure. What is more difficult is that in the pursuit of transmission rate alone, only IEEE 802.11ac Wave can be expected in 2016, and the new standard 11ax succeeding 11ac has It may not be until 2019, even if you are happy to watch it, every time the new rate standard is not finalized for 2 years, the drafting standard will start first, and it will have to be a topic until 2017. Similarly, the high-speed transmission method based on 60 GHz is IEEE 802.11ad (commonly known as WiGig). Since the integration into the Wi-Fi Alliance in 2013, the official certification service has been postponed and has not been launched in 2014 and 2015, even It is difficult to get a warm response when it is launched in 2016, and the new standard IEEE 802.11ay (rate increased to 20 Gbps to 40 Gbps) is expected to be finalized in 2017. The current industry and market concerns are not high. Another bail-out is that the Wi-Fi Aware standard was introduced in early 2015. After the certification of six companies in the middle of 2015, no new chips and devices have been certified, indicating the implementation of Wi-Fi Aware technology and applications. Not as expected. The Wi-Fi HaLow proposed in 2016 is only the exact name of the original IEEE 802.11ah, and there is still little actual progress. Despite the bail-outs of official standards and certification implementations, unofficial Wi-Fi technology developments have been successful, such as the University of Washington study proposed passive Wi-Fi, the rate dropped to 11Mbps, which is only equivalent to the 1999 Wi-Fi rate ( IEEE 802.11b standard), but the power consumption is only one ten thousandth of the current, and there is still a transmission distance of 30 meters, which is very suitable for home Internet of Things applications. Another study from the Massachusetts Institute of Technology, its Computer Science and Artificial Intelligence Laboratory (CSAIL) proposed to provide Wi-Fi security protection by location, the current Wi-Fi security protection is mostly achieved through password or identity authentication, and A new technology called Chronos attempts to provide protection by recognizing the angle and distance of Wi-Fi devices. The study was conducted in two apartments and a coffee shop. The former had a test accuracy of 94% and the latter 94%. It is very special to provide security protection by positioning. More specifically, the positioning method is different. In the past, more than three or more Wi-Fi access points (APs) were used to measure the distance energy intensity. Way to explore the location of Wi-Fi devices, but Chronos is a time-of-flight (TIme-of-flight) method, only one AP can be positioned, and the accuracy is 20 times higher than the past, can provide The number of positions is very different. If the security protection of the azimuth identification is feasible, the end user can save the memory Wi-Fi password, and the encryption and decryption calculation of the Wi-Fi transmission can be omitted, and a higher substantial data transmission amount can be obtained in the same time. In addition, the University of Washington, also earlier research, proposed Wi-Fi wireless charging technology, through the AP can provide operating power to 18-meter, 25-meter temperature sensors, cameras, and data transmission, There is no battery in the device, and the device receives the power transmitted by the Wi-Fi AP for immediate reception and immediate consumption. Another capture of the experiment was the ability to charge Ni-MH batteries and lithium polymer button batteries up to 25 meters away. Looking at the above, due to the implementation of the new Wi-Fi standard is not as expected, the development of more advanced technical standards is still pending, so the Wi-Fi commercial market has not clearly promoted the direction in the short term. Fortunately, academic research has opened up a number of long-term exploration and advancement directions, and the long-term development of Wi-Fi technology is still worth looking forward to. You can try to imagine that the future Wi-Fi adopts tens of meters of wireless charging, and the power consumption is only one ten thousandth of the past. In addition, the azimuth angle is used for security identification, so the convenience for the end user will be The situation is very different. It is worth noting that the trend of information technology and social cloud development is also affecting the use of Wi-Fi. OpenSignal proposes Crowd Sourcing, which allows the masses to spontaneously upload free Wi-Fi hotspots (HotSpot). SSID, password, so you can use the mobile phone to check the map, you can know that there is free Wi-Fi nearby, so you can provide the convenience of Wi-Fi application without the essence of electronic engineering technology, and derive Wi-Fi. The new look of sociology.
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