PDA

View Full Version : Question DCCH & DTCH


cocoloco
2012-05-10, 06:46 PM
Dear experts,

What is the difference between DCCH & DTCH channels? Do they correspond to DCH channels for RRC and RAB in Cell-DCH state?
I'll appreciate your heelp.
firstmaxim
2012-05-11, 04:04 AM
Dear experts,

What is the difference between DCCH & DTCH channels? Do they correspond to DCH channels for RRC and RAB in Cell-DCH state?
I'll appreciate your heelp.

DCCH carries the L3 signaling info, DTCH carries the user traffic. They both can be mapped onto the same DCH, provided they are of identical QoS. If the QoS of DCCH and DTCH differ, then they will be mapped on two different DCH transport channels.