What is 802.11ax? How does it compare to 802.11ac? Here we will share some fast Q&A to tell you what the 802.11ax is.
Questions and Answers to Learn about the 802.11ax WiFi
- Q: 802.11ax – what is it?
Well, you’ve heard of 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac wave 1, and 802.11ac wave 2…
In any case, 802.11ax is the next wireless communications standard in the IEEE’s long-standing series of 802.11 standards, which form the basis for the technology we generally just call Wi-Fi.
Like 802.11ac, the new 802.11ax is backward compatible with previous Wi-Fi generations. However, it’s the first standard that focuses not only on faster speed but also on Wi-Fi efficiency, or network capacity, especially in crowded air space. This means 802.11ax allows for faster real-world speed than previous standards. 50 different gadgets all demanding a slice of the internet pie shouldn’t be a problem at all, even if they’re using a large amount of data. That said, on paper, 802.11ax can be four times faster than 802.11ac. Also, an 802.11ax router helps existing pre-802.11ax Wi-Fi devices have faster speed thanks to its ability to manage traffic diversity and overcome the density of overlapping networks.
- Q: Standards?
The IEEE standards, put simply, are agreed-upon sets of technological capabilities and features that all devices that want to call themselves, say, 802.11ac, have to have. It’s to make sure that a phone from Samsung works just as well with a Wi-Fi access point made by Aruba as it does with a router made by D-Link or Cisco. If it’s 802.11-whatever-certified, it’ll work with everything else certified for that standard.
- Q: Ready for some techy specs?
802.11ax works on the 2.4GHz and 5GHz bands, and it introduces OFDMA (which stands for the catchy Orthogonal Frequency-Division Multiple Access). This basically helps to reduce the amount of interference from other nearby WiFi networks, by using finer channels.
- Q: But new wireless tech gets invented like every day.
It certainly does, and the IEEE has a heck of a time keeping up with it. The standards process is a rigorous one, and it’s necessarily time-consuming. The newest official standard is 802.11ac, which was published in 2013. Before that, 802.11n went official in 2007.
- Q: So 802.11ax isn’t fully cooked, is what you’re saying.
Correct. It’s a work in progress, but it’s got a lot of exciting new capabilities – 802.11ac broadened the multi-antenna capabilities (MIMO, or multiple input, multiple output) introduced in 802.11n, but 802.11ax will be able to subdivide signals even further, using a technology called MIMO-OFDM.
- Q: What’ll MIMO-OFDM do?
Broadly, increase throughput – second-wave 802.11ac technology advertises potential gigabit speeds, although that’s unlikely to be reachable in practice, but 802.11ax’s goal is to deliver as much as five times the capability.
- Q: Is that the big point of 802.11ax, then? A simple speed upgrade?
Not exactly. 802.11ax is particularly aimed at high-density Wi-Fi deployments, improving not only speed, but the ability of connections to stay active even when interfered with heavily. If you’ve been to a technology convention or trade show lately, you’ll know that the existing co-existence features built into Wi-Fi aren’t really sufficient to particularly dense environments.
- Q: It’s an efficiency thing, then.
Yeah, largely. In essence, it offers a more sophisticated system for routing bits of messages where they need to go.
- Q: Sounds good –802.11ax coming?
Not so fast – the IEEE probably won’t drop the final certification on 802.11ax until about 2019, and it’s far from clear when certified hardware is going to start coming out. To be fair, hardware has been released before formal certification as far back as 802.11n, but that’s not necessarily something to rely on, at least for business users.
- 802.11ax vs. 802.11ac: What’s the difference?
Difference between 802.11ac and 802.11ax
|BANDS||5 GHz||2.4 GHz and 5 GHz|
|CHANNEL BANDWIDTH||20 MHz, 40 MHz, 80 MHz, 80+80 MHz & 160 MHz||20 MHz, 40 MHz, 80 MHz, 80+80 MHz & 160 MHz|
|FFT SIZES||64, 128, 256, 512||256, 512, 1024, 2048|
|SUBCARRIER SPACING||312.5 kHz||78.125 kHz|
|OFDM SYMBOL DURATION||3.2 us + 0.8/0.4 us CP||12.8 us + 0.8/1.6/3.2 us CP|
|DATA RATES||433 Mbps (80 MHz, 1 SS)
6933 Mbps (160 MHz, 8 SS)
|600.4 Mbps (80 MHz, 1 SS)
9607.8 Mbps (160 MHz, 8 SS)
- 802.11ax timeline: When will 802.11ax devices and routers come to the UK?
Qualcomm has just launched the first two 802.11ax compatible chips – the IPQ8074, designed for use in routers, and the QCA6290 designed for use in connected devices such as phones and tablets. However, even though these chips are now a reality, there is no estimated arrival date for the first 802.11ax routers and devices.
Hardware standardisation should be done by summer 2017 according to Qualcomm, so the first 802.11ax routers could be released in the UK and worldwide as early as second half of 2017. Otherwise, 2018 is a safe bet.
802.11ax will also be coming to the automotive industry soon, so you can expect to see cars with 802.11ax networking capabilities in the next year or so.
Qualcomm says the IPQ8074 is a highly-integrated all-in-one platform designed for access points, gateways and routers. The 14nm chip integrates an 11ax radio, MAC and baseband, and a quad-core 64-bit A53 CPU as well as a dual-core network accelerator. It uses a 12×12 Wi-Fi configuration (8×8 on the 5GHz band and 4×4 on the 2.4GHz band) and supports MU-MIMO for uplink. As a result, it can deliver up to 4.8 Gbps while maintaining fast connections over a larger coverage area than any 802.11ac chip.
The chip also features Qualcomm’s Wi-Fi Self-Organizing Network (SON) which simplifies installation and optimizes traffic.
On the client side, Qualcomm says the QCA6290 SoC can offer up to a 4x increase in throughput speed in a crowded network. It supports 2×2 MU-MIMO and can realize the full benefits of the 8×8 MU-MIMO thanks to its 8×8 sounding mechanism. The chip can combine 2.4GHz and 5GHz bands using its Dual Band Simultaneous (DBS) feature to deliver up to 1.8 Gbps Wi-Fi speed. Compared with 802.11ac, the chip can reduce power consumption by two thirds.
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