How many symbols are present in RACH sequence and what about its length?
I think it is 839 sequences (Zadoff-Chu sequence), and duration is .9 ms.
In the process of random access resource selection preambles are selected from group A and B with certain criteria.
Now my question is why we have to use this two sets instead of one set of 64 preambles?
What is size and content of RACH first message (Random Access Preamble transmission) by UE to eNodeB.
Also if someone can explain the fields and sizes?
Why there is no mapping for RACH transport channel to any logical channel? Why RACH is terminated in MAC?