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Communications Technology Laboratory

Public Safety Communications Research Division

Analysis and Simulation of Migration of PTT Services to 4G LTE

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Analysis and Simulation of Migration of PTT Services to 4G LTE_On-Demand Session
Analysis and Simulation of Migration of PTT Services to 4G LTE_On-Demand Session
The performance of Mission-Critical Push-To-Talk (MCPTT) in future public safety networks based on LTE and 5G will be a key driver of operational success and safety. MCPTT is being implemented by many vendors and tested at interoperability events such as the ETSI Plugtest events, but large-scale experimentation with real equipment is often limited by factors such as equipment availability and field testing costs. For these reasons, a high-fidelity simulation model of MCPTT for the popular ns-3 discrete-event network simulation framework has been initiated by NIST Wireless Networks Division and further developed in this PSIAP-funded project. We will describe specifically how the off-network MCPTT simulation models from NIST have been extended to model on-network MCPTT operation over a simulated LTE radio access network and core, and how these models can be used in large-scale simulation experiments such as have been authored by NIST. Key performance indicators (KPIs) such as access time latency and mouth-to-ear latency are supported by performance traces from the simulation models, and the models will allow researchers to explore issues such as scheduling policies and robustness to intermittent links in a controlled, reproducible simulation environment. Simulation tests and documentation are also published as part of the open-source software dissemination of the models.

Speakers

  • Sumit Roy, University of Washington
  • Thomas Henderson, University of Washington

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Created May 19, 2020, Updated October 27, 2020