HomeIoTMigrating from 2G/3G for IoT? Listed below are the 4 key components...

Migrating from 2G/3G for IoT? Listed below are the 4 key components to think about when selecting your improve path

In December 2022, Transforma Insights launched a White Paper ‘2G and 3G switch-off: what community evolution means for IoT’ in collaboration with Telia and Ericsson, which appears on the implications of 2G and 3G community switch-off for enterprise IoT deployments. The refarming of spectrum is nothing new, with nations comparable to Australia, Japan and the US having engaged in varied such challenge for a decade or extra. Nevertheless, the tempo of such actions is now accelerating, notably in Europe. The upshot is that increasingly enterprises are confronted with important choices about how to deal with the upcoming community switch-offs.

The White Paper examines a number of of the implications, together with the optimum approaches to migrating. On this article we think about one other query: what subsequent? As soon as enterprises have made the choice to improve from 2G/3G, how ought to they go about selecting a substitute. Transforma Insights identifies 4 key components that must be thought of: functionality, protection, longevity, and value.

Generations defined

Earlier than we get into the decision-making course of, it’s value reminding ourselves of the background. The primary analogue cellular networks appeared within the Nineteen Eighties, to be rapidly changed by the twond era GSM and CDMA networks within the Nineteen Nineties. The latter made way more environment friendly use of spectrum, have been safer and will ship (admittedly restricted) knowledge companies. If you happen to discover an analogy with the present means of 2G and 3G switch-off, that’s deliberate. What’s occurring now’s mirroring what occurred again within the Nineteen Nineties with 1G (though it actually wasn’t referred to as ‘1G’ on the time!), albeit the dimensions is now a lot greater.

The following evolution noticed the Third Technology Partnership Mission (3GPP), a grouping of requirements growth businesses, take cost of growing new mobile requirements. This took the shape firstly of a number of variants of 3G after which a single converged 4G expertise within the type of LTE, which was first launched in 2009.

The 2010s noticed the 3GPP focus some consideration on the IoT house, growing applied sciences to suit throughout the newly rising Low Energy Broad Space (LPWA) class. These are extra acceptable for IoT’s necessities, comparable to being optimised for low energy consumption. The ensuing developments consisted of a number of applied sciences, of which the principle two have been NB-IoT (also referred to as LTE Cat NB1/2) and LTE-M (also referred to as LTE Cat M1). The purpose with these two applied sciences was to commerce off decrease bandwidth and better latency in trade for cheaper gadgets with lengthy battery life.

In addition to LTE-M and NB-IoT, there have been additionally additional evolutions of LTE to offer various units of functionality a few of that are extra related to IoT, comparable to Cat 0 and Cat 1 bis.

The following mobile evolution noticed 5G networks launched in 2019. In 2022 a brand new variant of 5G was additionally added within the type of 5G Lowered Functionality (RedCap) which seeks to supply a toned-down model of 5G to supply a cheaper price level and longer battery life.


The capabilities of the completely different mobile connectivity applied sciences range considerably, which enterprises will inevitably wish to think about when selecting their improve path.

There are two fundamental classes of applied sciences throughout the mobile household. Some applied sciences are targeted on offering bandwidth (i.e. 4G and 5G), whereas others goal offering low-cost gadgets with lengthy battery life (such because the aforementioned LTE-M, NB-IoT, and to a lesser extent Cat 1 bis and 5G RedCap).

The highest performing applied sciences by way of downlink speeds are 5G NR (200 Mbit/s), LTE Cat 4 (150Mbit/s) and 5G RedCap (85Mbit/s). They’re usually, nonetheless, not one of the best for supporting lengthy battery life, that are NB-IoT and LTE-M. NB-IoT, as an illustration, might be anticipated to assist gadgets on battery energy for a number of years.

Typically, it’s LTE-M and NB-IoT which have capabilities most akin to 2G, and in a way more power-efficient method. Functions requiring excessive bandwidth (or low latency) might want to concentrate on 5G NR, and to a lesser extent 4G.


One other main consideration is which applied sciences can be found through which geographies. Not all are but obtainable in every market, and the place they’re they could have broadly various protection.

Most markets within the developed world have 4G networks with >95% inhabitants protection. These LTE networks largely assist the varied classes, together with Cat 1, Cat 1 bis and Cat 4. They will additionally assist LTE-M, though not each community operator has undertaken the required improve. In accordance with the GSM Suppliers Affiliation, there have been 57 LTE-M networks at mid-year 2022.

NB-IoT additionally requires a community improve. There have been 124 business launches of NB-IoT networks up to now. The presence of an NB-IoT or LTE-M community in a market is just not essentially an indicator of nationwide protection.

5G networks have been launched in round 70 nations as of mid-year 2022.


The main focus of the White Paper is on the challenges and alternatives related to upgrading from 2G and 3G networks, largely stimulated by community switch-offs. Due to this fact, it appears wise to think about the seemingly longevity of the choice applied sciences.

Essentially the most future-proof expertise is more likely to be the newest, though not at all times, as illustrated by the choice to change off 3G earlier than 2G in some nations. However, we are able to count on that 5G networks shall be round for the foreseeable future, actually nicely into the 2040s. Nevertheless, 5G is pricey, and there will not be actually any issues over the long-term longevity of 4G networks. No cellular community operators anyplace on the planet has but given any indication of, not to mention set a timetable for, switching off LTE networks. We count on them to be round for the following 20 years. Nevertheless, if that form of timescale is even too unsure, NB-IoT and LTE-M, shall be round for even longer, as a result of they’re supported as a part of the 5G normal.


The ultimate consideration is that of price. The choice to go for 5G New Radio (NR) shall be mitigated by the excessive unit prices at present, usually over US$ 100 per module. Clearly there shall be some use circumstances the place the ultra-high bandwidth and ultra-low latency shall be extremely worthwhile, however that in all probability received’t be the bulk. Comparable can be stated of 5G RedCap, which in its present iteration is probably going too costly for many customers, though we count on future expertise releases to refine it fairly significantly.

As a substitute for 2G, the obvious choices are NB-IoT and LTE-M, each of which have module costs someplace within the neighborhood of US$ 5 per unit, with NB-IoT the marginally cheaper of the 2. That’s comparable with the previous 2G value factors. The opposite different is LTE, which has the benefit of protection at present, as famous above. Right here prices might be as little as US$ 10 for Cat 1 bis, US$ 20 for Cat 1 and US$ 30 for Cat 4.

It additionally must be thought of how these costs may change over time. We count on each 5G NR and 5G RedCap to change into significantly cheaper over the following 5 years. With higher volumes of gadget gross sales we additionally count on LTE-M and NB-IoT to change into cheaper too.

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