These are interesting times for suppliers in the narrowband two-way radio market. Their traditional customers are increasingly looking to see how they can access the multitude of data applications readily available to consumers via cellular broadband and Wi-Fi networks. How do they enable this while still providing all the benefits that private two-way radio networks provide?
Ross Spearman, the new chief technology officer of professional mobile radio (PMR) vendor Tait Communications, certainly has a view on this as he has spent much of his professional life with Ericsson, the largest supplier of cellular infrastructure to the mobile phone industry.
Speaking to Wireless earlier this year, he observed: ‘What was interesting for me coming from a 3G and 4G cellular communications background was that I came into the PMR world with a “why not just use LTE for everything” mindset.
He adds that he has heard a lot of ‘either/or’ discussions when it comes to the two technologies, but to him this does not seem to be a sensible argument. ‘It would be better to use a combination of both,’ he asserts, pointing to the example of a New Zealand utility Tait is working with that has deployed both Digital Mobile Radio (DMR) and LTE base stations to both augment coverage and to be able to run data applications.
‘Seamless roaming is a really nice application for keeping people connected and it keeps users off the mobile network, as that’s what costs the business money. You use it when necessary, but it is not always required. So both user management and resilience is addressed. It is quite an elegant solution that we have evolved further over the last year since it was first launched.’
‘Take an emergency room in a hospital; that tends to be quite well shielded, so you might not get cellular or PMR coverage, but it is likely they will have Wi-Fi, so there is no reason why your radio shouldn’t switch over to Wi-Fi.’
He adds that there are several different ways of automatically selecting the best bearer network depending on whose infrastructure, network and radios are involved. ‘You can either do it at the start of the call by looking at the signal strength, quality and so on. Or you can look at a pre-set policy and decide which way to go.
‘And it is not just about the wireless side,’ he points out. ‘It is also about leveraging the value of the interface of the smartphone to access pictures, maps and other data applications, so you can really make use of that capability. If you look at Transport for London, since 2007 they have had GPRS for data running on the buses. The difference now is that you can provide that service to a user walking down the street, whereas before you needed several devices to do that – and now you can combine all that with a PMR system.’
But police now have two devices – a smartphone and a two-way radio. The question is how the radio with its big battery pack and 5W output can best be integrated with the smartphone. Perhaps all that is required is a PTT lapel mic with UnifyVoice capability, which could be the interface for everything – not just the radio.
‘You could embed a very small set of phrases into the microphone, like “I want to run a numberplate check”, and the application would convert the speech to text then transmit that over the LTE or LMR network. The requisite data base takes the request, sorts it out, and sends back an answer either as text or speech without the need to involve a dispatcher,’ he says.
‘All of this is about meeting the user experience and providing the right form factor for the role,’ interjects Cain. ‘Some users will still need the traditional brick-style radio for IP67 protection reasons, for example. But others won’t need that, so we might see a real explosion in form factors coming down the line.’
‘So, the end users that have relied on those 2G networks are trying to re-align themselves. What they want is security of supply for a long time and a lot of the devices they have installed have only been out there for five years, so having to replace them all with a different connectivity IoT device is way out of whack for what they need.
‘The last thing they want is to have to replace all their wireless devices out in the field every five-year regulatory period. The other key driver for utilities and power companies is to reduce the outage penalties. By meeting the outage restoration targets they can save millions by just investing in a few thousand IoT devices,’ says Bishop.
‘No, we are not going to build an LTE base station and go into competition against Ericsson or Nokia, but we still expect to look after the same people we always have. Now it is more about what you put at the ends of the radio system, than the radio system itself.’
Cain adds that the closer Tait is to its end users the better it is for them and the company’s resellers. The point being that Tait has the expertise and critical communications know-how from working closely with those end users for years. Mobile operators and some of their key vendors lack this knowledge and this is where the likes of Tait can help.
‘I took a look internally when I arrived at Tait and the majority of our R&D spend is on software development, so adapting to this new world is not such a change as you might think for a PMR vendor. The difference is that we are writing code that end users interact with. It may only have been a couple of lines on a radio display before, but now we are writing code for smartphones that makes the apps work.
‘So, that is different,’ he acknowledges, ‘and that is why we are working closely with police and utility companies to make sure we tailor our solutions closely to what they need. There are many different roles within the police. For example, a covert officer might want to have a PTT app open, but he wants it to look like he is on Facebook, so nobody knows what he is up to.’
Cain adds: ‘Yes, our core competency is hardware, but it is really about understanding how something is going to be used by the end users. We have to create something that really makes them safer and work better, so that’s why we work closely with them.’
‘They have no patience for doing things the old way,’ he says. ‘Take something like that voice to text app I mentioned earlier. A recent graduate will just go on line, grab some software and set up a demo, and ask: is this what you mean?’
How about the sales channel and the resellers: are they keeping up with this change? Cain says the company has to strike a careful balance, as a lot of Tait’s customers are not looking to jump straight into the next technological innovation all the time.
‘Change is good,’ he asserts, ‘but resellers help to moderate the pace of change by telling us what end users are ready for. But our end mission is to deliver the communications that they need and can use.’
‘But they are also building services and apps around our products,’ says Cain. ‘We have no monopoly on good ideas as we have seen in the UK and other markets and that is heartening to see, so I think our reseller community is on board with this new world.’
