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View Full Version : Question PRACH size in LTE



Mdaf
2016-06-21, 07:18 AM
Hi,
If we assume that we have disabled group B preambles (large size) and a UE has really big message to be sent, what will happen? Does it mean that the UE will distribute his PRACH on more PRACH RBs?

wolverine
2016-06-21, 04:43 PM
It might have to, but by this stage the PRACH is not used anymore. Message 3 is sent using the PUSCH. The eNodeB provides a default uplink grant for this message. If it is not enough, the UE will indicate so in its BSR and get scheduled again in the next TTI.