DIFF Subgroup
H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
Introduced: January 2018
Full Title
Services specially adapted for wireless communication networks; Facilities therefor > Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
No child classifications to compare. This is a leaf node in both IPC and CPC.