2nd June 2010 at 04:02
#52787
KAMOLI
Guest
HI THERE,
RACH ERROR IS DUE TO RACH COLLISIONS AS;
The RACH channel is used to transmit the “CHANNEL REQUEST” message.
The channel is called “random” since the mobile chooses the call TS randomly.
This means that there is a risk of collision.
Collisions are resolved by retransmission after pseudo-random delays.