According to the Wi-Fi Alliance, the organization responsible for certifying Wi-Fi standards , the IEEE 802.11b standard (Wi-Fi 7) is still under development . According to the article “Current Status and Directions of IEEE 802.11be, the Future Wi-Fi 7” , published in the magazine/newspaper “IEEE Access”, in 2019 the development of the new Wi-Fi standard started with the Task Group BE (TGbe) , but that the Working Group 802.11 (Working Group 802.11, translated) provided information on the main innovations of the technology.
The biggest changes in Wi-Fi 7 include the 2-fold increase in bandwidth used and the increase in the number of spatial streams. These and other enhancements have brought the new standard to data transfer of up to 40 Gbps.
IEEE 802.11b and (Wi-Fi 7) standard
With the completion of Wi-Fi 6 development in May 2018, the 802.11 Working Group began to develop new features for bands between 1 and 7.12 GHz . A year later, in March 2019, it was defined that the new Wi-Fi standard would be called IEEE 802.11be or Wi-Fi 7. The plan is for the final version of Wi-Fi 7 to be introduced in early 2024. Improvements that Wi-Fi 7 should bring are: 320 MHz channels, 4K-QAM, OFDMA and multi-link technology enhancements.
320 MHz channels
Wi-Fi 7 will double the bandwidth over the 6GHz frequency where multiple channels are available. So far, it is known that 320 MHz channels will be used and the use of two 160 MHz channels together not adjacent to the 80 + 80 MHz channels of 11ac. In addition, the technology will allow 240/160 + 80 MHz channels.
With each increase that occurs in the constellation, the gain is smaller and smaller. Even though implementing 256-QAM in 802.ac (Wi-Fi 5) we achieved a 33% gain compared to 64-QAM in 802.11n (Wi-Fi 4), Wi-Fi 6 (802.ax) ), with the 1024-QAM, achieved a 25% gain. At the same time, in addition to increasingly decreasing gain, the 4096-QAM exhibits a signal-to-noise ratio (SNR) of approximately 40 dB. In other words, to have a good signal transmission on Wi-Fi 7 it will be necessary to use Wi-Fi Access Points and Routers very close to client devices (cell phones, notebooks, tablets).
In the IEEE 802.11b standard (Wi-Fi 7) OFDMA uses the same scaling approach as in 11ax. However, now there will be a new degree of freedom. With the new technology, it will be possible to assign multiple RUs to one STA.
With 11be, MU-MIMO will have a total of 16 SSs in all programmed STAs, doubling the throughput.
Qualcomm is already developing chips for Wi-Fi 7
In July 2021, it was reported that Qualcomm, Broadcom and MediaTek are already developing chips with the next standard, Wi-Fi 7. According to Qualcomm, network speed will be doubled compared to Wi-Fi 6. In addition , the new standard will be able to combine multiple frequency spectra and provide superior quality.
MediaTek to Feature Wi-Fi 7 at CES 2022
During a developer meeting held a few weeks ago, MediaTek’s vice president of product marketing James Chen spoke about the benefits of the new technology, especially for gamers who will suffer from less latency, as well as expounding the company’s planning on the development of this new technology.
It is known that during CES 2022, the Taiwanese company should present a type of project that simulates the new technology, but for now there is no specific date for the official launch of Wi-Fi 7. The company guaranteed that the development is yet to is “too early”. The idea is that this will begin to be implemented around the second quarter of 2022. But that depends on the Wi-Fi Alliance, the non-profit organization responsible for the wireless standard.
Regarding CES 2022, it is worth remembering that it is the largest technology fair in the world, which will take place between January 5th and 8th in Las Vegas (United States), returning to be held in person after the blockages caused by the pandemic.