Today, with the emerging development of the Internet of Things industry, people have derived various wireless communication standards for different Internet of Things application requirements. Wi-Fi, as a familiar "life partner" around us, from mobile phones in our pockets to PCs at work and office, from film and television media to intelligent Internet of Things, WiFi affects all aspects of our lives, then, how is Wi-Fi Among many communication technologies, Wi-Fi has become the darling of the public. What are the advantages of Wi-Fi in the future?
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1. Wi-Fi wireless technology "successful"
Unified protocol standard
First of all, with Wi-Fi Alliance as the technology guide, continuous version updates and unified Wi-Fi protocol standards enable Wi-Fi devices to be used normally in different countries around the world.
Wi-Fi, as a data interaction method of wireless transmission, has been far more popular in the world than other wireless communication technologies. Choosing a device with Wi-Fi means smooth communication based on Wi-Fi's extensive communication. Enjoy freedom and experience convenience.
High speed
Secondly, the high-speed transmission rate of Wi-Fi makes people choose Wi-Fi as wireless communication without hesitation when experiencing high-bit-stream application scenarios such as games, shopping, and film and television.
communication distance
In addition, long communication distance is also an advantage of Wi-Fi in the field of communication. In terms of radiation distance, the radiation distance of WiFi networking can reach about 50-300 meters. In certain usage scenarios, such as shopping malls, stations and other public places , no need to use cables, reducing deployment and expansion costs.
Information exchange
From the perspective of information interaction, Wi-Fi, with its excellent communication rate and popularity, enables people to easily enter the public network and access wireless resources in the network with the help of a router gateway when using Wi-Fi wireless local area technology. , This phenomenon has already made WiFi a way of "Wireless Ethernet" to access the Internet, and even makes people ignore that WiFi itself is a wireless local area communication technology.
Wi-Fi can be said to be "successful and famous" today, but the Wi-Fi Alliance is not satisfied with the current situation. In the future, with the development of the intelligent Internet of Things, Wi-Fi needs to do more, that is, to create low-cost and low-power consumption application performance and the pursuit of higher transmission rates.
2. Wi-Fi Halow—Sprint low power consumption, long-distance, high-speed IoT requirements
Although, compared with other short-distance IoT connection technologies, Wi-Fi has the advantages of faster transmission rate, direct access to the Internet, and low latency, but its power consumption and cost are also higher, which also This limits the application of Wi-Fi technology in the broader IoT market.
Therefore, the Wi-Fi Alliance released a physical layer and media access control layer protocol for wireless local area network for the Internet of Things market, which is a new type of WLAN system that can operate in the license-free frequency band below 1GHz (750MHz-930MHz) Standard, namely IEEE 802.11ah, this technology is also known as Wi-Fi Halow.
Since Wi-Fi Halow can operate in a frequency band lower than 1GHz, this also enables it to maintain a relatively high rate and achieve a longer-distance, lower-power connection, which can meet many requirements for transmission rate, distance, and power consumption. The needs of the Internet of Things market with higher requirements.
1 The transmission rate is up to 86.7M
In terms of transmission rate, Wi-Fi Halow provides a data transmission rate of up to 86.7M in the sub 1GHz frequency band, compared to Sigfox, LoRaWAN, Zigbee, Z-Wave, BluetoothLow Energy, NB-Iot and other dedicated frequency shift keys Competing IoT technologies such as FSK (FSK) radio systems are orders of magnitude higher.
2 The transmission distance exceeds 1 km
In terms of transmission distance, Wi-Fi Halow can also exceed 1 km, second only to long-distance wireless LAN technologies such as Sigfox and LoRaWAN.
3 Excellent low power consumption performance
In terms of power consumption, one of the key design criteria for Wi-Fi HaLow technology is low power consumption, allowing IoT devices to operate for years on battery power. The new MAC functionality enables devices in Wi-Fi HaLow networks to save energy, reduce congestion, and increase capacity and device density.
4 The comprehensive cost is further reduced
In terms of cost, Wi-Fi HaLow, like other Wi-Fi standards, natively supports IP networks, simplifies access to the Internet and cloud-based applications, and does not require additional expensive infrastructure compared to other IoT connectivity technologies Facilities, such as hubs, repeaters or gateways, etc., the overall cost can be further reduced.
3. Wi-Fi6—Create broadband, multi-channel, multi-user high-speed experience
The difference between Wi-Fi 6 and previous generations of Wi-Fi
Although the speed provided by the Wi-Fi version (Wi-Fi5 Wi-Fi4) can basically meet our daily use, have we ever imagined that when you need to download a 1.2G file online, you need to wait for the time It only takes 1 second. When you are in shopping malls, stations, concerts and other places where many people gather, there will be no lag when using public Wi-Fi. Now Wi-Fi6 is here.
Wi-Fi6 is based on the 802.11ax protocol, supports 2.4G and 5G frequency bands, supports a maximum bandwidth of 160Mhz, supports a maximum of 8 input and output channels, and has a theoretical maximum communication rate of 9.6Gps (1.2G/s). Then Wi-Fi6 How many "6"s are there?
1. Support OFDMA Orthogonal Frequency Division Multiple Access
Support OFDMA Orthogonal Frequency Division Multiple Access. The previous generations of WIFI have always used OFDM (Orthogonal Frequency Division Multiplexing Technology). When multiple devices are connected to the router, there will be a sequence. Regardless of the size of the packet, the entire channel will be occupied. After the transmission is completed, the next user can use the channel.
Comparison between OFDM technology and OFDMA technology
OFDMA divides the wireless channel into multiple sub-channels (sub-carriers) in the frequency domain to form time-frequency resource blocks, and user data is carried on each resource block instead of occupying the entire channel, thus realizing each time period Multiple users in the network transmit in parallel at the same time, no longer need to wait in line and compete with each other, which improves efficiency and reduces the delay in waiting in line.
2. MU-MIMO technology
MU-MIMO multi-user, multiple input and output technology, this technology cannot be reflected on a single network device, but an application on multiple devices connected to the network, MU-MIMO technology will significantly improve the entire multi-user Internet experience, without Worry about the bottleneck of data uplink and downlink.
Effective Wi-Fi coverage when transmitting over long distances or with multiple obstacles
3. Support TWT target wake-up
Support TWT target wake-up, save more power and network resources, learn from the 802.11ah (Wi-Fi HaLow) standard, let the equipment using the network stand by without being connected to the network, make the network smoother, and let our terminal equipment ( Such as mobile phones, laptops) save more power.
Coloring Mechanism Display
Nowadays, the advent of the Wi-Fi 6 wireless communication standard has increased the data transmission rate to the 10G level. Obviously, the 10G-level telecommunications bandwidth has not yet been popularized. In the fierce competition of network speed, wireless transmission is compared with Wired finally ushered in a long-lost victory! As the speed of wireless network becomes faster, people's way of life will also change accordingly.
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