Is Wi-Fi 6 An Important Aspect of The Future of IoT
That may not come as a surprise considering how many advancements have been combined to create radio technology, four of which stand out. The first was.
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Key takeaways
- That may not come as a surprise considering how many advancements have been combined to create radio technology, four of which stand out.
- The new version’s main features are throughput and spectral efficiency enhancements, which permit more network connections while maintaining good service.
- Nordic Semiconductor, a pioneer in developing and producing all three wireless technologies, aspires to lead that revolution.
Wi-Fi has a troubled past. That may not come as a surprise considering how many advancements have been combined to create radio technology, four of which stand out. The first was Hawaii’s creation of a groundbreaking packet-radio network in the 1970s. ALOHAnet linked seven campuses on four different islands so they could all speak with one another via a centralized computer on Oahu.
Second, the Industrial, Scientific, and Medical (ISM) usage of the 2.4-GHz spectrum (among other allocations) was codified by the Federal Communication Commission (FCC) of the United States in 1985. The action prompted businesses to consider how to utilize this brand-new radio resource.
Then, in the 1990s, researchers in radioastronomy from Australia’s Commonwealth Scientific and Industrial Research Organization (CSIRO) devised a solution to the multipath issues that plagued indoor, high-throughput radio communications. The discovery provided the framework for wireless local-area networks (WLANs) and opened the door to the widespread use of Wi-Fi.
The physical-layer (PHY) and media-access-control (MAC) specifications for a WLAN protocol known as IEEE 802.11 were subsequently defined by an Institute of Electrical and Electronic Engineers (IEEE) standards committee. The intended use was “wireless Ethernet,” which used RF technology to connect computers in a way that wired networking had previously not been possible.
The initial iteration of the Wi-Fi specification, IEEE 802.11-1997, was created by the committee and released in June 1997. Then, in 1999, the standard was amended to include the technology that forms the foundation of most of today’s Wi-Fi systems. To make the technology more widely available, the Wi-Fi Alliance was established.
Challenges in Power and Deployment #
The Internet of Things is now the fifth significant event that is impacting the development of Wi-Fi. The word was created in 1999 by Kevin Ashton, a business leader promoting RFID, and was still two years away from being formally approved when the first Wi-Fi standard was established. Today, wireless technology is used to link billions of devices (or “things”) to the established internet.
Bluetooth Low Energy (BLE), Thread, Zigbee, and other protocols carry the weight for short-range IoT networks. The cellular IoT’s LTE-M/NB-IoT and LoRaWAN are proving to be viable solutions for wide-area networks (WANs) for the IoT. Now, what about Wi-Fi? It would seem to be the ideal choice for wireless networks that require more range than what the short-range, low-power protocols can deliver, but not the kilometers-plus range of the WAN technologies. However, a deeper look reveals that Wi-Fi has several significant limitations for IoT applications.
The first problem is power consumption. The primary purpose of Wi-Fi is high throughput, which uses battery power. IoT wireless solutions, in contrast, often work to reduce on-air time in order to maximize battery life and decrease maintenance. Lower throughput is the trade-off, although, for sensors and actuators that only sometimes provide small quantities of data, this is seldom a problem.
In dense deployment circumstances, Wi-Fi has problems. Many of us are used to seeing inconsistent service when using public hotspots in crowded malls and libraries. Although it is bothersome, customers can usually afford to put up with it. Different situations arise in industrial networks with a large number of sensors.
IoT-ready Architecture #
A new Wi-Fi version, officially known as IEEE 802.11ax and marketed as Wi-Fi 6, claims to overcome the issues that have prevented the technology from being widely used for the Internet of Things. Wi-Fi 6, which the Wi-Fi Alliance approved earlier this year, was created expressly to satisfy the needs of dense installations in both public and industrial settings. The new version’s main features are throughput and spectral efficiency enhancements, which permit more network connections while maintaining good service. The new version offers a number of improvements.
For instance, devices can consume less than one channel of bandwidth when using the new orthogonal frequency-division, multiple-access (OFDMA) feature, sharing the bandwidth with other devices on the network to enhance capacity. Additionally, these technical developments allow for quicker reactions from and to linked equipment. Wi-Fi 6 can easily handle huge sensor networks made up of hundreds of devices, whereas earlier versions of Wi-Fi failed to do so.
A significant technological improvement for applications in the smart home and business is also brought by Wi-Fi 6. The advancement, known as “target wake time” (TWT), represents a major improvement over the power-saving measures used by earlier Wi-Fi versions.
Client devices and access point bargain wake-up timings when utilizing TWT technology (APS). Therefore, maintaining the wireless connection does not need the clients to be awake. Large groupings of client requests can therefore be combined by an AP into fewer triggered transmit chances. The advantages include improved channel access that is free of conflict and considerable power reductions for client devices of up to 80% in similar applications. IoT devices with lengthy battery lives are, therefore, more useful.
Wi-Fi 6 uses Wi-Fi Protected Access (WPA) 3 to boost security (although this was rolled out separately to Wi-Fi 6). Instead of the Pre-Shared Key technique used by earlier WPA2 security, WPA3 employs the Simultaneous Authentication of Equals (SAE) protocol. SAE stops some brute-force attacks that may be used against routers using PSK.
The ability of IoT devices to connect directly to the cloud through routers without the need for extra data subscriptions is another significant benefit of Wi-Fi 6. Furthermore, novel use cases like wireless security cameras and high-quality video doorbells are made possible by the technology’s increased throughput compared to conventional short-range wireless alternatives. A wearable device that streams music can use the extra throughput to supplement Bluetooth when transferring big volumes of data.
Internet for Smart Homes #
The Connectivity Standards Alliance supports Wi-Fi 6 as a core component of the smart home because it aims to make it easier to connect devices utilizing various wireless protocols. In addition to Ethernet and Thread, Matter, the alliance’s unifying IP-based connection protocol, is intended to operate across Wi-Fi 6 (and earlier versions) (and for ease of commissioning, BLE).
“Border routers” will be widely used as part of the CSA effort. Such gadgets are not novel ideas. Vendors, however, were compelled to create their own solutions up to this point. The item is a particular kind of router that connects nearby networks utilizing additional physical layers from an IEEE 802.15.4 network (such as Wi-Fi). In order to make Internet Protocol (IP)-based communication more practical for both suppliers and customers, border routers might be routinely included in products like smart speakers and lighting fixtures.
Products for industrial Wi-Fi 6 are just now starting to become available. But in a few years, short-range wireless, Wi-Fi 6, and cellular IoT will complement one another to provide the large, resilient, and low-latency networks required for the IoT to fulfill its potential. Nordic Semiconductor, a pioneer in developing and producing all three wireless technologies, aspires to lead that revolution.
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