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Follow the link http://july.fixedreference.org/en/20040724/wikip
edia/Time_division_multiple_access
Posted by HamidAliKhan
Random Access Channel (RACH): A slotted Aloha
channel to request access to the network .
In the GSM system, the synchronisation of the
mobile phones is achieved by sending timing
offset commands from the base station which
instructs the mobile phone to transmit earlier or
later.For this reason, an entire timeslot has to
be dedicated to mobiles attempting to contact
the network (known as the RACH in GSM).
For details:
http://july.fixedreference.org/en/20040724/wikip
edia/Time_division_multiple_access
Posted by sagitraz
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