P25 LMR & LTE: Better Together with Standards Based Interworking
John Lambrou (Distinguished Member of the Technical Staff, Motorola Solutions)
Stephen Nichols (Executive Director, Project 25 Technology Interest Group)
Location: Critical Comms Spotlight Theater
Date: Thursday, March 20
Time: 12:45 pm - 1:05 pm
Track: Critical Comms Spotlight
Topics: Broadband, Interoperability, LMR, P25
Format: Expo Theater
Vault Recording: TBD
Project 25 has over 3600 LMR systems on the air today offering PTT communications to First Responders nationwide. As Broadband LTE systems continue to evolve many question what type of Standards based Mission Critical PTT Interworking will be available between the two technologies.
A Newly released study of Interworking between LMR and LTE has just been published. The “Study of Interworking between P25 LMR and 3GPP (MCPTT) Mission Critical Services” report from The Alliance for Telecommunications Industry Solutions (ATIS) and the TIA TR-8.8 subcommittee (responsible for P25 Standards) was published by ATIS/TIA March 14, 2025.
The Editor of this new document will present an overview and highlights including scenarios and considerations for the use of a 3GPP Release 15 Inter Working Function (IWF) to enable interoperability of standardized voice and data services between a 3GPP Mission Critical system and a TIA-based LMR system. The TIA-based LMR systems included are: P25/TIA-102 Trunking; P25/TIA-102 Conventional; TIA-603 Analog Conventional FM.
Takeaway
• What Standard Services are common between LMR and LTE?
• How can P25 Standard Interfaces best be used to create interworking with LTE Broadband Systems and devices?
• What is the future view for the evolution of interworking between LMR and LTE technologies