top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

What is size and content of RACH first message by UE to eNodeB.

0 votes
934 views

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?

posted Jun 27, 2014 by anonymous

Share this question
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

RA Preamble is a sequence not a message with fields (Check the Figure 5.7.1-1 of the 36.211) , consists of a cyclic prefix of length and a sequence part of length. The sequence length is 839 (139 for format 4).

The MAC layer sends to PHY the premable index, PRACH and target power. Based on that, PHY transmits the preamble sequence.

answer Jun 28, 2014 by anonymous
Similar Questions
+2 votes
LTE: How UE decides about when and where it needs to send RACH Request ?

Actually i am trying to learn RACH procedures and getting lots of hurdles to understand. I am posting my queries whatever is coming to my mind so that i will get the descriptive answers. I hope someone will help me here to learn it. Thanks in advance.

+3 votes
LTE: How Network knows exactly when the UE is going to transmit the RACH?

Actually i am trying to learn RACH procedures and getting lots of hurdles to understand. I am posting my queries whatever is coming to my mind so that i will get the descriptive answers. I hope someone will help me here to learn it. Thanks in advance.

+2 votes
LTE: How much resource is granted by eNodeB to transmit msg3 ?

Can someone please tell me "How much radio resource is granted on PUSCH" for msg3 (RRC Connection Request or RRC Connection Re-establishment Requet or RRC Connection Reconfiguration Complete).

+4 votes
In QXDM log, how to identify first RACH message which UE sends?

I am looking at information on which message to refer to first RACH message sent by UE when attaching to network

Which message should I refer to and filter to be applied? Any screenshot would be helpful.

...