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Longer Range WiFi “HaLow” Networks Coming via the 900MHz Band

Tuesday, Jan 5th, 2016 (7:55 am) - Score 2,968

The Wi-Fi Alliance has officially launched its new WiFiHaLow” technology, which is based off the long-in-development IEEE 802.11ah standard and uses the 900MHz radio spectrum band in order to deliver a longer range and lower power network solution.

The obvious advantage of using a low frequency like 900MHz is that it can propagate more easily through walls and reach devices / computers that reside further away (i.e. at least double the range of 2.4GHz), all while requiring significantly less power than the usual 2.4GHz or 5GHz bands. In an outdoor environment it could even be boosted to cover a range of up to 1km.

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Naturally this makes it useful for the so-called Internet of Things (IoT), which may exist in a Smart Home or connected car environment where many different components need to communicate (M2M). Mind you there are already a number of other wireless technologies that can cater for this, albeit with some limitations.

Edgar Figueroa, Wi-Fi Alliance President, said:

Wi-Fi HaLow is well suited to meet the unique needs of the Smart Home, Smart City, and industrial markets because of its ability to operate using very low power, penetrate through walls, and operate at significantly longer ranges than Wi-Fi today.

Wi-Fi HaLow expands the unmatched versatility of Wi-Fi to enable applications from small, battery-operated wearable devices to large-scale industrial facility deployments – and everything in between.”

However Ofcom has already allocated 900MHz (880.1-914.9MHz / 925.1-959.9 MHz) for use by Mobile Network Operators (MNO), such as O2 and Vodafone, which leaves very little spectrum for the HaLow technology that would thus have to avoid causing interference for other services in the same band.

The above situation also limits how much spectrum is available for HaLow to use and that in turn means that the data speeds will be quite slow, starting at around 150Kbps (0.15Mbps if you prefer that in Megabits per second) and rising to perhaps 10-20Mbps.

The decision to use 900MHz also means that 802.11ah is not backwards compatible with existing kit and thus all of the needed hardware would have to be replaced in order to gain any benefit. Not to worry though because the alliance won’t begin to certify final HaLow hardware until 2018, although you might well see it incorporated into some products as part of a draft release before that date.

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Mark-Jackson
By Mark Jackson
Mark is a professional technology writer, IT consultant and computer engineer from Dorset (England), he also founded ISPreview in 1999 and enjoys analysing the latest telecoms and broadband developments. Find me on X (Twitter), Mastodon, Facebook, BlueSky, Threads.net and .
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