At the press conference, the Wi Fi Alliance announced a new term to distinguish the upcoming device, Wi Fi 6e, that supports Wi Fi 6 on the 6GHz band. However, the group noted that the 6GHz band is not yet available for Wi Fi because it is still waiting for approval from regulators around the world. Recently, FCC chairman Ajit Pai expressed his intention to make the 6GHz band available for Wi Fi, so this may mean it will soon be approved in the United States.

Phil Solis, director of research at IDC, said the use of Wi Fi in the 6GHz band is likely to increase rapidly because of its huge potential.

Once approved by regulators, smartphones and consumer access points are expected to be the first devices to adopt the technology, followed by business access points. Wifi-6e is especially suitable for Wi Fi and augmented reality. It will also help solve the problem of insufficient Wi Fi spectrum by providing a continuous spectrum block that can accommodate 14 additional 80 MHz channels and 7 additional 160 MHz channels.

Although higher spectrum can provide faster speed and larger capacity, it is smaller in scope and easier to be blocked by obstacles. Therefore, the 6GHz band is unlikely to replace the existing Wi Fi band. Of course, you can only see the real benefits of Wi Fi 6e when it’s really available, and now, it’s not known when that will happen.

Industry cry out: opening 6GHz band to WiFi

Simultaneous interpreting of apple, Broadcom, CISCO, Microsoft and other American technology giants issued a joint statement in October 2019, responding to the proposal of the FCC to solicit the use of 6GHz technologies for WiFi and other technologies. The joint statement pointed out that, as mobile communication bands have low, medium and high frequency bands, they meet different transmission needs, WiFi As one of the most popular wireless networking technologies in the world, it needs 6GHz and other higher frequency bands to support the use of large bandwidth and low delay transmission. It is hoped that the FCC can open up as soon as possible. It is also called on the FCC to promote the same frequency band internationally to provide WiFi equipment.

Who is the first to benefit from adding new frequency bands to the Wi Fi alliance

FCC should be based on three principles, including protection of existing users, appropriate specification and innovation, etc., and open 6GHz to WiFi and other devices. Since April 2019, a series of tests have been carried out to prove that the signals of existing users can be protected from interference by introducing automatic frequency control, ultra-low power and other mechanisms.

The popularity of WiFi has led to a significant growth in the number of networking devices. Under this trend, the existing 2.4-2.4835ghz and 5.725-5.850ghz frequency band resources may not be enough. In order to ensure the unlicensed frequency band resources, FCC issued a consultation document unlicensed use of the 6GHz band in October 2018, inviting all walks of life to focus on 5.925-7.125ghz, a total of 1200MHz Some suggestions and opinions are put forward.

At present, in some parts of the United States, there are a variety of existing services in this band, including fixed point-to-point service of police and fire communication return network, broadcast auxiliary service of TV station transmitting remote content, cable TV relay service and fixed satellite service. In order to protect the existing users, the FCC also proposes the power level division and automatic frequency control mechanism of the license free device, so that the existing services will not be disturbed under the condition of sharing the spectrum resources.

In addition to the large factories mentioned above, the companies that support the opening of 6GHz band for unlicensed use include Intel, WiFi alliance, CTIA, NCTA, etc. all of them are in favor of opening 6GHz band, but they have different views on the management rules and mechanisms.

For example, the WiFi alliance believes that WiFi is playing an increasingly important role in providing broadband connection services, and the demand for spectrum resources is also increasingly urgent. Therefore, it is hoped that the FCC can complete the 6GHz specification for unlicensed applications as soon as possible. However, for the automatic frequency control mechanism, WiFi The alliance believes that it is too strict to enforce the coordination of spectrum utilization through automatic frequency control mechanism. At the same time, it may take many years to develop and certify a commercial automatic frequency control system, which will hinder the development of WiFi ecosystem.

The American Wireless Industry Association (RCA) is opposed to the proposal that all frequency bands on 6GHz, regardless of the power level or location of their devices, should be controlled through an automatic frequency control mechanism to ensure that existing services are not interfered with. The National Association of cable and Telecommunications believes that the 6 GHz unlicensed frequency band should be limited to indoor use of low-power devices, and should not be coordinated through an automatic frequency control mechanism.

Those who oppose the 6GHz liberalization as unlicensed use can be divided into two types: existing users and mobile communication operators. In the existing users, such as the fixed wireless communication Union (FWCC) and the United States Public Utility Technology Association (UTC), the mobile communication industry such as Verizon, at & T, Ericsson, etc.

According to the fixed radio union of the United States, no matter the power level of the equipment, it will cause interference to the existing fixed service receivers. If the FCC decides to open, all unlicensed devices must be managed by automatic frequency control mechanism.

According to the American Public Utility Technology Association, public utilities and other key infrastructure enterprises have already used the 6 GHz frequency band to provide services such as power grid operation and remote monitoring of distribution lines. These services require high reliability and low delay. If the license free use is opened, the existing services will be at risk.

For example, Ericsson and Nokia, the major telecommunication equipment manufacturers, believe that the United States lacks medium frequency which can cover a wide range of 5g. Therefore, it is suggested that FCC reconsider the use of 6GHz in order to make more flexible use of spectrum resources and accelerate the development of 5g in the United States.

According to the statistics, whether or not the broadband and broadband wireless devices will be widely used by all sectors of the world will be reviewed again according to the requirements of the mic in 2020.

In addition to the FCC, the European Communication Commission of the European Conference on postal and Telecommunications Management (CEPT) also completed the research on providing RLAN and other devices sharing and compatibility in the 5925-6425mhz frequency band in May 2019. In addition to the use of unlicensed frequency bands, China also proposed at the Asia Pacific Telecommunications Organization (APT) meeting held in August 2019 that 5925-7125mhz should be used as one of the frequency bands for future mobile broadband services.

In addition, the purpose of the 6GHz band has not been determined, but the WiFi alliance has recently incorporated the 6GHz band into the next generation WiFi Standard Specification, known as 802.11be, and aims to complete the standard formulation by 2023. The WiFi alliance believes that 802.11be will mainly provide the extremely high transmission and low delay communication advantages above 30gbps, and is expected to more effectively support 8K image transmission, cloud computing and remote office application services. No matter whether the 6GHz band will be used as unlicensed or mobile communication in the future, under the premise of global coordination.

Editor in charge: CT

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