Group Communication System Enablers (GCSE)
The present document collects the requirements as relevant to improve the 3GPP system to support Group Communication for Public Safety and Critical Communication and other services.
For Public Safety and Critical Communication Services, US requirements as specified in NPSTC (Mission Critical Voice Requirements) [2], [3], [4], the TETRA + Critical Communications Association (TCCA) [8] and ITU [6], [7] inputs are taken as starting point.
Other regional requirements may also be reflected in the work. The requirements are worded in a way to easily accommodate future requirements from other regions or stakeholders.
Other services have corresponding regulatory and service justification.