Samsung Announces 3GPP-Based LMR-to-LTE Interworking Function
Friday, August 27, 2021 | Comments

Samsung announced that it expects to release a Third Generation Partnership Project (3GPP) standards based interworking function that enables interoperability between public-safety LTE networks and legacy LMR networks by the end of the year.

The initial release of the interworking function will support the Project 25 (P25) Console Subsystem Interface (CSSI), Inter-RF Subsystem Interface (ISSI) and the Digital Fixed Station Interface (DFSI), said Timothy Paul, senior manager of sales, network business, Samsung Electronics America. A version that supports TETRA and Digital Mobile radio (DMR) radios is expected next year, he added.

The interworking function meets all of the key performance indicators (KPIs) outlined in the 3GPP standards for mission-critical push-to-talk (MCPTT) and meets the reliability requirements for mission-critical voice on the radio side, Paul said.

Paul said that the solution is software based and connects to an agency’s data center. The radios and LTE devices are then connected via an IP tunnel. If there are multiple agencies responding to an incident, each agency can connect to the interworking function using their own IP tunnel connected to their data center.

Another major advantage of the interworking function is its support for multimedia broadcast multicast services (MBMS), which allows an organization to send video and data one link to multiple responders at once instead of sending links individually to each responders. This helps agencies use bandwidth judiciously, Paul said.

Samsung plans to do several pilots and proof of concepts with critical organizations, Paul said. Those pilots will likely begin sometime in the first or second quarter of next year, he said.

Read more about the new solution a blog written by Paul here.

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