When the mobile network becomes faster and faster, and the operators launch large traffic packages, the Wi Fi (wireless local area network), which once liberated people from the wired network, seems to be becoming more and more vulnerable. Will Wi Fi disappear in 5g or even 6G era?
Recently, the international Wi Fi Alliance (WFA) announced on its official website that it has recently introduced a new wi-fi6e term to distinguish wi-fi6 devices that can operate at 6GHz. The Wi Fi Alliance said it was ready to enter 6GHz as soon as possible, and members of the alliance are expected to show the wi-fi6e prototype device for the first time on the ces2020. However, to use the 6GHz band, Wi Fi still needs to wait for the approval of global regulators.
In China, through China Unicoms 5g network access and Huaweis wi-fi6 technology deployment, Shenzhen Metro Futian hub has already become the first wi-fi6 subway station in China in the middle of this year.
Will Wi Fi disappear seems to be no problem for the time being. The theoretical maximum speed of the next generation of Wi Fi can reach 9.6Gbps, and the chip, terminal and router of wi-fi6 have been launched one after another.
What is wi-fi6?
5g is the pronoun of high-speed rate of mobile network, wi-fi6 is the pronoun of high-speed rate of wireless local area network, with iteration every 4 to 5 years.
Mobile communication and Wi Fi are on a par with each other, one in the main room and the other in the main room. They want to dominate each others territory, but they also want to complete each other from time to time. Xia Xu, vice chairman of 3gppsaa1, said in an interview with surging news (www.thepaper. CN) that 5g package needs traffic fee, while Wi Fi has a natural free advantage.
In 1997, IEEE developed the first WLAN standard 802.11, and the data transmission rate was only 2Mbps at that time. After more than 20 years of development, Wi Fi technology is constantly updated, with 802.11n, 802.11ac and 802.11ax. In the second half of 2018, in order to make it easier for users to understand the intergenerational relationship of the technology, the international Wi Fi Alliance (WFA) renamed 802.11ax as wi-fi6, correspondingly, 802.11ac as wi-fi5, 802.11n as wi-fi4.
2019 is known as the first commercial year of wi-fi6. Compared with the ubiquitous wi-fi5 in the market, the data transmission speed of wi-fi6 has increased by 40%, at 1201mbps. However, theoretically, the network speed of wi-fi6 is much faster than 1201mbps, with a maximum of 9.6Gbps. The network delay is reduced from 30ms to 20ms, which can support ar / VR.
In addition, according to the white paper on wi-fi6 and 5g technology and application scenarios released by Huawei in August this year, as the next generation of Wi Fi, wi-fi6 can save more than 30% of terminal power consumption, which can meet the requirements of Internet terminals for low power consumption.
At present, Samsung Galaxy S10 series and iPhone 11 series support wi-fi6. Cisco, ASUS and other manufacturers have launched enterprise class wi-fi6 wireless network products to the market, and home class wi-fi6 router has also begun to be introduced to the market.
The working frequency band of wi-fi6 is 2.4GHz + 5GHz. At present, the price of Router Supporting wi-fi6 is more than 1000 yuan, and wi-fi6 can be started only when your mobile phone or computer also supports it. Most mobile phones and smart homes do not support this standard. Xia Xu told the surging news reporter.
Wi-fi6 complements 5g
The enterprises in the Wi Fi industry chain are similar to 5g, but 5g must be driven by operators, so it seems that operators are not so active in the development of wi-fi6, but they are already in the layout. An operator insider told surging journalists that as early as the second half of 2018, China Telecom had organized wi-fi6 technology test, and the future home gateway and all room Wi Fi of China Telecom had taken wi-fi6 into account. In addition, wi-fi6 fully considers high-speed communication scenario, high-capacity terminal access scenario, Internet of things application scenario, communication security and other factors when formulating the standard. In the appropriate scenario, wi-fi6 can be used not only for personal communication, but also for Internet of things, industrial Internet and other applications.
In December 2019, the wireless broadband Alliance (WBA), which pays more attention to the practical application and experience of Wi Fi, announced that it had completed the experiment of transmitting large-scale files such as 4K video with wi-fi6 in an aerospace factory in the UK. In the test process, wi-fi6 technology uses 80MHz channel to generate 700mbps speed, while applications such as video call and video stream achieve low latency results under 6ms. In the view of industry insiders, in the factory environment or Internet of things scenario, wi-fi6 can compete with 5g.
In terms of the coverage of indoor distributed data services, 5g and Wi Fi have some competitive relations, but on the whole, 5g and Wi Fi are complementary relations without too much contradiction. For 5g, in addition to data, the more important business is to make phone calls. Dr. Ouyang ye, vice president and CTO of AsiaInfo Technology (China) Co., Ltd. (01675. HK), told surging news reporters that in foreign countries, when there is technology to make calls, you can switch from mobile network to Wi Fi, but this technology has not been promoted in China.
In Xia Xus view, wi-fi6 is a useful supplement to 5g in the Internet of things.
5g networks are deployed on higher C-band (4-8ghz radio band) and millimeter band. This means that 5g signal is weaker than 4Gs through the wall capability. From this point of view, using WiFi 6 to make up for the coverage of 5g signal indoors will be a very good complementary scheme. Xia Xu further explained to the surging news reporter that the ultimate goal of 5g is the interconnection of all things. From the data point of view, the largest connection of 5g is about 1 million / km2, but in the center of some cities, such a number of connections may not be able to connect all devices. At this time, wi-fi6 can be a useful supplement.
According to surging journalists, 5gs core network is gradually moving towards fixed migration and integration, and wi-fi6 will also be connected to 5gs core network. In the 5g standard defined by 3GPP, 5g core network supports the access of non 3GPP access network such as Wi Fi, which means that in the future, when users move indoors and outdoors, they can always enjoy the high-speed rate and realize the switch between the senseless Wi Fi and 5g network. According to a report from Huawei, the current shipment volume of Wi Fi chips is more than 1 billion pieces per year, of which smart phones account for almost half. The enterprise chips supporting 11n (wi-fi4) are expected to completely withdraw from the stage of history in 2019. Huawei forecasts that with the maturity of wi-fi6 chip and the growing popularity of supporting wi-fi6 terminals, wi-fi6 will become the mainstream of the market. By 2023, it is expected that 90% of the enterprise wireless networks will choose wi-fi6. Source: surging news editor: Wang Fengzhi, nt2541
According to surging journalists, 5gs core network is gradually moving towards fixed migration and integration, and wi-fi6 will also be connected to 5gs core network. In the 5g standard defined by 3GPP, 5g core network supports the access of non 3GPP access network such as Wi Fi, which means that in the future, when users move indoors and outdoors, they can always enjoy the high-speed rate and realize the switch between the senseless Wi Fi and 5g network.
According to a report from Huawei, the current shipment volume of Wi Fi chips is more than 1 billion pieces per year, of which smart phones account for almost half. The enterprise chips supporting 11n (wi-fi4) are expected to completely withdraw from the stage of history in 2019.
Huawei forecasts that with the maturity of wi-fi6 chip and the growing popularity of supporting wi-fi6 terminals, wi-fi6 will become the mainstream of the market. By 2023, it is expected that 90% of the enterprise wireless networks will choose wi-fi6.