Do you wanna know whether your boyfriend likes play computer games? Let me share you a tip, you can check his computer is network cable connection or not. Because boys have high requirements on network speed and delay when playing games, and most of the current home WiFi can’t do this even if the broadband network speed is fast enough, so boys who often play games tend to choose wired access to broadband to ensure a stable and fast network environment.
This also reflects the problems of WiFi connection: high latency and instability, which are more obvious in the case of multiple users at the same time, but this situation will be greatly improved with the arrival of WiFi 6. This is because WiFi 5, which is used by most people, uses OFDM technology, while WiFi 6 uses OFDMA technology. The difference between the two techniques can be graphically illustrated:
On a road that CAN accommodate only one car, OFDMA can simultaneously transmit multiple terminals in parallel, eliminating queues and congestion, IMPROVING EFFICIENCY AND reducing latency. OFDMA divides the wireless channel into multiple subchannels in the frequency domain, so that multiple users can simultaneously transmit data in parallel in each time period, which improves the efficiency and reduces the delay of queuing.
WIFI 6 has been a hit since its launch, as people demand more and more wireless home networks. More than 2 billion Wi-Fi 6 terminals were shipped by the end of 2021, accounting for more than 50% of all Wi-Fi terminal shipments, and that number will grow to 5.2 billion by 2025, according to analyst firm IDC.
Although Wi-Fi 6 has focused on user experience in high-density scenarios, new applications have emerged in recent years that require higher throughput and latency, such as ultra-high-definition videos such as 4K and 8K videos, remote working, online video conferencing, and VR/AR games. Tech giants see these problems too, and Wi-Fi 7, which offers extreme speed, high capacity and low latency, is riding the wave. Let’s take Qualcomm’s Wi-Fi 7 as an example and talk about what Wi-Fi 7 has improved.
Wi-fi 7: All for Low Latency
1. Higher Bandwidth
Again, take roads. Wi-fi 6 mainly supports the 2.4ghz and 5ghz bands, but the 2.4ghz road has been shared by early Wi-Fi and other wireless technologies such as Bluetooth, so it becomes very congested. Roads at 5GHz are wider and less crowded than at 2.4ghz, which translates into faster speeds and more capacity. Wi-fi 7 even supports the 6GHz band on top of these two bands, expanding the width of a single channel from Wi-Fi 6′s 160MHz to 320MHz (which can carry more things at a time). At that point, Wi-Fi 7 will have a peak transmission rate of over 40Gbps, four times higher than Wi-Fi 6E.
2. Multi-link Access
Before Wi-Fi 7, users could only use the one road that best suited their needs, but Qualcomm’s Wi-Fi 7 solution pushes the limits of Wi-Fi even further: in the future, all three bands will be able to work simultaneously, minimizing congestion. In addition, based on the multi-link function, users can connect through multiple channels, taking advantage of this to avoid congestion. For example, if there is traffic on one of the channels, the device can use the other channel, resulting in lower latency. Meanwhile, depending on the availability of different regions, the multi-link can use either two channels in the 5GHz band or a combination of two channels in the 5GHz and 6GHz bands.
3. Aggregate Channel
As mentioned above, the Wi-Fi 7 bandwidth has been increased to 320MHz (vehicle width). For the 5GHz band, there is no continuous 320MHz band, so only the 6GHz region can support this continuous mode. With the high-bandwidth simultaneous multi-link function, two frequency bands can be aggregated at the same time to collect the throughput of the two channels, that is, two 160MHz signals can be combined to form a 320MHz effective channel (extended width). In this way, a country like ours, which has not yet allocated the 6GHz spectrum, can also provide a wide enough effective channel to achieve extremely high throughput in congested conditions.
4. 4K QAM
The highest order modulation of Wi-Fi 6 is 1024-QAM, while Wi-Fi 7 can reach 4K QAM. In this way, the peak rate can be increased to increase the throughput and data capacity, and the final speed can reach 30Gbps, which is three times the speed of the current 9.6Gbps WiFi 6.
In short, Wi-Fi 7 is designed to provide extremely high speed, high capacity, and low latency data transmission by increasing the number of available lanes, the width of each vehicle transporting data, and the width of the traveling lane.
Wi-fi 7 Clears the Way for High-speed Multi-connected IoT
In the author’s opinion, the core of the new Wi-Fi 7 technology is not only to improve the peak rate of a single device, but also to pay more attention to the high-rate concurrent transmission under the use of multi-user (multi-lane access) scenarios, which is undoubtedly in line with the upcoming Internet of Things era. Next, the author will talk about the most beneficial iot scenarios:
1. Industrial Internet of Things
One of the biggest bottlenecks of iot technology in manufacturing is bandwidth. The more data that can be communicated at once, the faster and more efficient the Iiot will be. In the case of quality assurance monitoring in the Industrial Internet of Things, network speed is critical to the success of real-time applications. With the help of the high-speed Iiot network, real-time alerts can be sent in time for a faster response to problems such as unexpected machine failures and other disruptions, greatly improving the productivity and efficiency of manufacturing enterprises and reducing unnecessary costs.
2. Edge Computing
With people’s demand for fast response of intelligent machines and data security of the Internet of Things is getting higher and higher, cloud computing will tend to be marginalized in the future. Edge computing simply refers to computing on the user side, which requires not only high computing power on the user side, but also high enough data transmission speed on the user side.
3. Immersive AR/VR
Immersive VR needs to make corresponding fast response according to the real-time actions of the players, which requires very high low delay of the network. If you’re always giving players a one-beat slow response, then immersion is a sham. Wi-fi 7 is expected to solve this problem and accelerate the adoption of immersive AR/VR.
4. Smart security
With the development of intelligent security, the picture transmitted by intelligent cameras is becoming more and more high-definition, which means that the dynamic data transmitted is getting larger and larger, and the requirements for bandwidth and network speed are also getting higher and higher. On a LAN, WIFI 7 is probably the best option.
At the End
Wi-fi 7 is good, but at present, countries show different attitudes on whether to allow WiFi access in the 6GHz (5925-7125mhz) band as unlicensed band. The country has yet to give a clear policy on 6GHz, but even when only the 5GHz band is available, Wi-Fi 7 can still provide a maximum transmission rate of 4.3Gbps, while Wi-Fi 6 only supports a peak download speed of 3Gbps when the 6GHz band is available. Therefore, it is expected that Wi-Fi 7 will play an increasingly important role in high-speed Lans in the future, helping more and more smart devices avoid getting caught by the cable.
Post time: Sep-16-2022