There’s a fragmented choice of wireless technologies for low power, wide area IoT

Bob Emmerson, freelance writer and IoT industry observer

The telecom industry is good at generating confusion, says freelance IoT and communications writer, Bob Emmerson. LTE Cat-1 services are being launched in the States but not NB-IoT (LTE Cat NB1 is the official term), which only arrives in 2018.

However, NB-IoT is recognised as the international standard for Internet of Things (IoT) networks and it is being rolled out in Europe. So much for a global standard. Do you wait and miss out?

Maybe it’s time to check out the alternative mature technologies like Nwave, Ingenu, Sigfox, Weightless, and the LoRa Alliance. But — and it’s a very big ‘but’ — you should also look under the NB-IoT hood and evaluate the trade-offs.

I’ve been writing about cellular networks from the very beginning and it’s abundantly clear that LTE (long-term evolution to 4G) is a great technology. A brand-new network core and air interface technologies provide a groundbreaking combination of efficiency and flexibility. The efficient use of spectrum lowers costs and enables a combination of high-speed, low-latency transmission with cost-effective, low bit rate services.

However, since I wrote those words the IoT exploded and it was clear that the legacy low bit rate service of 50Mbps was over-engineered. Data rates measured in a couple of hundreds of kbps are more than adequate for most IoT applications.

Right now, Cat-1 is still the technology of choice for new IoT deployments, but a 10Mbps downlink isn’t needed. Cat-0, an IoT standard from 3GPP was promoted for a while but now it’s dead, as is Cat-M1. That was just part of the cellular IoT alphabet soup.

NB-IoT, when it arrives, will offer low complexity, low power consumption and long range. Key characteristics include 180kHz bandwidth and uplink and downlink data rates of about 200kbps with half-duplex operation. However, it seems that low complexity, which is needed to bring down module / device costs, has been achieved via trade-offs. To put it bluntly, they had to be made: it wasn’t possible to simply scale down the overall performance.

One such trade-off is the fact that by design (found in 3GPP Specification TR45.820) NB-IoT is planned to only acknowledge 50% of messages serviced by the wireless technology. This is due to limited downlink capacity. If they acknowledge more, it will hit their capacity much harder than they’ve designed for. Without 100% acknowledgement the technology isn’t suitable for use in many use cases.

Another trade-off is delays caused by the buffering of messages and data in what is called transmit packet aggregation. The 3GPP capacity specifications rely on bundling periodic reports into a single larger transmission, which cellular technology needs in order to handle communication transactions efficiently.

I’m a writer, not a communications expert, but it is clear that Cat-1 and NB-IoT are a retroactive response to a relatively new market requirement. The guys behind Sigfox, LoRa and other LPWAN solutions saw it coming and designed brand new technologies from the bottom up.

That said, there isn’t going to be a killer technology, one that captures the market. And despite the limitations, NB-IoT is backed by the combined resources of connectivity ecosystems such as those of Nokia, Telit and Vodafone.

The author of this blog is freelance IoT and communications writer and observer, Bob Emmerson

Comment on this article below or via Twitter: @IoTNow_ OR @jcIoTnow

RECENT ARTICLES

QualSights unveils product consumption intelligence platform

Posted on: December 5, 2022

QualSights, the insights company in the United States, this week has announced the launch of Product Consumption Intelligence, a platform to passively measure human behavior in-home.

Read more

Daikin acquires Venstar, controls and energy management system provider

Posted on: December 5, 2022

Daikin Comfort Technologies North America, Inc. has acquired Venstar, Inc., a prominent controls and energy management systems provider whose technology and indoor comfort solutions are used in millions of residences and light commercial applications across the United States, Canada and Mexico.

Read more
FEATURED IoT STORIES

The IoT Adoption Boom – Everything You Need to Know

Posted on: September 28, 2022

In an age when we seem to go through technology boom after technology boom, it’s hard to imagine one sticking out. However, IoT adoption, or the Internet of Things adoption, is leading the charge to dominate the next decade’s discussion around business IT. Below, we’ll discuss the current boom, what’s driving it, where it’s going,

Read more

9 IoT applications that will change everything

Posted on: September 1, 2021

Whether you are a future-minded CEO, tech-driven CEO or IT leader, you’ve come across the term IoT before. It’s often used alongside superlatives regarding how it will revolutionize the way you work, play, and live. But is it just another buzzword, or is it the as-promised technological holy grail? The truth is that Internet of

Read more

Which IoT Platform 2021? IoT Now Enterprise Buyers’ Guide

Posted on: August 30, 2021

There are several different parts in a complete IoT solution, all of which must work together to get the result needed, write IoT Now Enterprise Buyers’ Guide – Which IoT Platform 2021? authors Robin Duke-Woolley, the CEO and Bill Ingle, a senior analyst, at Beecham Research. Figure 1 shows these parts and, although not all

Read more

CAT-M1 vs NB-IoT – examining the real differences

Posted on: June 21, 2021

As industry players look to provide the next generation of IoT connectivity, two different standards have emerged under release 13 of 3GPP – CAT-M1 and NB-IoT.

Read more

IoT and home automation: What does the future hold?

Posted on: June 10, 2020

Once a dream, home automation using iot is slowly but steadily becoming a part of daily lives around the world. In fact, it is believed that the global market for smart home automation will reach $40 billion by 2020.

Read more

5 challenges still facing the Internet of Things

Posted on: June 3, 2020

The Internet of Things (IoT) has quickly become a huge part of how people live, communicate and do business. All around the world, web-enabled devices are turning our world into a more switched-on place to live.

Read more

What is IoT?

Posted on: July 7, 2019

What is IoT Data as a new oil IoT connectivity What is IoT video So what’s IoT? The phrase ‘Internet of Things’ (IoT) is officially everywhere. It constantly shows up in my Google news feed, the weekend tech supplements are waxing lyrical about it and the volume of marketing emails I receive advertising ‘smart, connected

Read more