Hi,
In the LTE Technical report - 3GPP TR 25.912 V8.0.0 (2008-12),
It has been mentioned that the 'Average delay due to RACH
scheduling period' is 5ms and the 'RACH Preamble' is 1ms.

But, how is the value of 5ms and 1ms arrived ? What are
the other configurations for arriving at this value ?

Also,
Can anyone also provide me a LTE specific forum link
that discusses about LTE queries and standards ?

Thx in advans,
Karthik Balaguru