TETRA Backhauling via Satellite: Improving Call Setup Times and Saving Bandwidth

Table 2

TETRA call setup times with ISI via satellite.

Call type	Ack./unack.	Call setup time s	Calling user permission to transmit s	Called user permission to receive s	Timer constraints
Individual	Unack.	0.771	0.771	1.101	—
Group call (scenario 1)	Unack.	0.840	0.840	1.115	—
	Ack.	0.840	1.500	1.775	—
Group call (scenarios 2 and 3)	Unack.	1.330	1.330	1.040	—
	Ack.	1.330	1.970	1.680	—
Group call (scenario 4)	Unack.	2.060	2.060	1.775	T302  s
	Ack.	2.060	2.720	2.435	T302  s