If there is no RAR response from eNB/gNB will UE keep sending msg1 till preambleTransMax?

[sadanandk2]

@pradeep

When there is no msg2 response, UE can send 5 RACH attampts each seperated by a specific NAS timer. Each RACH attempt contains a cluster of MSG1 requests allowable by RACH parameters.

After the failure counter reaches 5, NAS layer will start T3402 and block that PLMN.

When does T3402 start?
At msg1 or msg3?
I think at msg3.
If it is, then t3402 may not come in to picture because we are failing at msg2?

If it is NAS timer, it may start even before msg1?

For LTE, when t3402 timer come into picture?

Hi Experts. For LTE, when t3402 timer come into picture?

I referred above topic. Someone it is given in attach accept. If UE not even attached to nw it has not received attach accept then howbit will get t3402?

@Ashish_Satasiya

From the network if back off indicator timer configure then UE will re for Rach else UE will check for second priority cell from initial search table.

Any literature explaining this?
If it is the case then some urgent action required for me. Please confirm.