Companies Demo LTE MCPTT Interoperability with Narrowband Voice
Monday, November 13, 2017 | Comments

Prescom and StreamWIDE jointly demonstrated the interoperability of Long Term Evolution (LTE) mission-critical push-to-talk (MCPTT) networks with narrowband professional mobile radio (PMR) networks. PRESCOM, a provider of interconnection gateways for heterogeneous networks and high availability communications systems for control and command centers, and StreamWIDE, a provider of MCPTT application servers, joined efforts to showcase the interoperability of narrowband and broadband services.

The companies developed the first version of interconnection between their industrial systems, formulating a case study based on an operational scenario of a terrorist attack in a large railway station. Security forces, equipped with narrowband TETRAPOL terminals, are called onsite where they communicate with their authorities equipped with LTE MCPTT smartphones. The plan of action requires meticulous organization and execution by a specialized intervention group, who install tactical bubble narrowband Project 25 (P25) upon arrival. Their authorities, equipped with LTE MCPTT terminals, can listen to the communications group through the tactical bubble P25 and intervene if necessary.

Because of the significant size of the railway station, the station security teams also need to connect with appropriate personnel to be updated on the action. They have TETRA narrowband terminals, and with interconnection capabilities, are able to communicate with authorities using LTE MCPTT smartphones. Because the synchronization of operations with the different forces on-site is essential, the authorities ask the command center to interconnect all the participants in real time. The authorities create a single group, LTE MCPTT terrorist attack, including all authorities with smartphones and all deployed units with TETRAPOL, P25 and TETRA terminals.

The case study, based on StreamWIDE’s MCPTT solution and Prescom’s PMR LTE gateways, demonstrated the technical and operational interoperability of narrowband systems with broadband systems and its importance in critical situations. Audio between networks of different technologies remains of high quality (no perceptible degradation), where induced latency is low and compatible with operational requirements.

The firms carried out significant research and development (R&D) work to achieve the satisfactory results. This development is the first step in the creation of gateways with more valuable functions because it allows a smooth migration to the LTE MCPTT networks of the future.

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