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Public-Safety Broadband/FirstNet


News

AT&T FirstNet highlights new EPTT features, future promise of MCPTT

AT&T FirstNet highlights new EPTT features, future promise of MCPTT

  • Written by Donny Jackson
  • 28th March 2019

COLLEGE STATION, TEXAS—Push-to-talk services over the FirstNet system being built by AT&T already are being leveraged and more use cases are developing as the offering rapidly evolves toward a mission-critical-push-to-talk (MCPTT)-compliant solution during the next few years, according to an AT&T FirstNet official.

AT&T’s existing enhanced push-to-talk (EPTT) product—a carrier-integrated product provided by Kodiak, which is owned by Motorola Solutions—is being used for non-mission-critical voice today and as a complement to LMR-based solutions, according to Steve Devine, lead manager for strategy and policy for AT&T FirstNet. When MCPTT-compliant offerings are fully implemented, the capabilities could prove to be transformative to public safety, he said.

“If you look at the potential for people in the field with some of the solutions that are highlighted in the standard—and I’m not saying that AT&T is going to provide them—but if you read the standard and you see what’s in there, it will take your breath away, if you’re familiar with how push to talk works today,” Devine said yesterday during a session at the Winter Institute conducted at the Disaster City facility on the Texas A&M campus.

As an example, Devine noted that LMR systems allow priority to be provided to a particular user and for talk groups to be established, but it is often done on a static basis. With MCPTT, such features can be implemented dynamically and in near real time—for instance, the ability to have a firefighter get floor control in a talk group when his/her blood-pressure or pulse levels meet a certain threshold, he said.

“But, with great power comes great responsibility,” Devine said, stressing the importance of management and administration of MCPTT’s future capabilities.

“The ability for push to talk to interface with other elements associated with that user are the kind of things that have to be managed but—if they are—they can reap great benefit for the users going forward.”

Devine outlined some of the new capabilities included in AT&T’s EPTT Release 9.0 offering, including a new user client interface that is designed to be more intuitive to users who are accustomed to using LMR systems. The

“The new client has a drop-down menu with six zones and slider that goes across 16 channels, so it gets you up to 96 talk groups,” Devine said. “From this mask, you can make a private call, and I can make a dynamic group call—ad hoc—by adding people to it from the screen.”

AT&T officials have stated that the company hopes to begin offering MCPTT to FirstNet users during the latter half of this year. Devine displayed a roadmap slide indicating that MCPTT network testing is scheduled to begin in the third quarter of this year and that MCPTT with LTE-Broadcast and direct-mode capabilities are slated to be delivered by next March.

Under its contract with the FirstNet Authority, AT&T is required to have at least two providers of MCPTT-compliant solutions, Devine said. Last year, AT&T conducted a procurement to select a second MCPTT vendor. Devine said that vendor has been chosen but has not been announced.

Three MCPTT-standard features—emergency services, user check and user disable/enable—are part of the new EPTT offering, as well as eight other features that are not part of the MCPTT standard approved by the 3GPP standards body that oversees LTE technology, according to Devine.

Many in public safety have been wary of vendors providing non-standardized features to otherwise standardized products, because it can create interoperability issues and result in a lack of vendor flexibility. Devine said that AT&T understands the situation and is committed to ensuring that such history is not repeated with MCPTT.

“While [these features]  may not be in the standard proper, it’s our responsibility to make sure that it is interoperable and compatible across system operators in a manner that would have a degree of compatibility consistent with the standard,” Devine said. “We need to hold the compatibility bar high and make sure that we’re not creating an island here.

“Most of us in the process are aware of the gaps and some of those things there. Our people are very cognizant that that product is out there and—when there’s only a single service provider—that’s a lot easier to look at. At the point when we have that second provider, it’s going to be more important for those non-standardized elements to be compatible, and we’re going to have to hold their feet to the fire—for both parties—to make sure that those things work in a manner that the user would expect, which is compatible and interoperable.”

Some of the most popular use cases for EPTT today is to replace LMR portable devices for employees that can use a non-mission-critical voice solution that can be integrated with the existing LMR system, so existing talk groups are not disturbed, according to Devine. In addition, some mission-critical LMR users are identifying areas where LTE provides better coverage—particularly in many in-building scenarios—and using EPTT as a complementary alternative, he said.

“It’s an exciting time—the most exciting time I can remember,” he said. “There’s a lot of work to do, and—to harness some of the potential for first responders that’s inherent in some of these things—it’s going to take some management, some oversight, and it’s going to take being able to identify where this is applicable, where I can use it for push-to-talk today, where I still need to keep my LMR solution, and how I manage those things going forward. And everybody’s scenario will be different.

“We’re seeing places where school-bus and facilities-management users are starting to use puah-to-talk solutions—preferably carrier-integrated push-to-talk solutions—to meet some of their needs going forward. The idea of buying a $4,000 or $5,000 radio for some of those users … The capabilities today are allowing them to think outside of the box and do things differently for some of those users, as necessary and as authorized to meet the agencies’ needs going forward.”

Fidel Liberal, coordinator of the Mission Critical Open Platform (MPOP), echoed this sentiment, noting that many rail and transit agencies in Europe have indicated that plan to replace their LMR systems with MCPTT solutions.

Liberal said it is important that providers to follow the 3GPP standards for MCPTT, but he stressed that simply following the standard does not guarantee interoperability. With this in mind, testing actual performance of solutions is critical, he said.

Although there are still many challenges that need to be addressed for MCPTT—most notably, in the area of direct-mode communications—Liberal said he is pleased with the progress to date.

“I do think that things are going faster than originally thought,” Liberal said. “As we go over the standard, we see that most of the pieces are already in place.”

Devine agreed.

“This process is moving fast, and we’ve got to make sure that public safety’s input is involved, … so we don’t make changes that aren’t supporting the responders going forward,” Devine said. “Things are moving much faster. We used to have 10 years to decide what we wanted our LMR system to do. Those days are gone. We’ve got to be more aggressive identifying the user needs.”

 

Tags: homepage-featured-4 Applications Broadband Push-to-X Companies Coverage/Interference Critical Infrastructure Enterprise Federal Government/Military Funding In-Building Incident Command/Situational Awareness Interoperability Land Mobile Radio Long Term Evolution (LTE) News NTIA/FirstNet Policy Public Safety Public-Safety Broadband/FirstNet Regional Coordination Software Standards State & Local Government Subscriber Devices System Design System Operation Test & Measurement Tracking, Monitoring & Control Wireless Networks News

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