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Vadim Yanitskiy axilirator at gmail.comHi,
> While transmitting the classmark or any message from mobile on
> SDCCH during a call, does it transmit on the frequency we get
> after converting the ARFCN or is there a slight variation ?
I don't get this, what do you mean by 'converting the ARFCN'?
There are two (as I know) possible types of call assignment:
- Early Assignment, when the network allocates TCH/F or TCH/H
right after getting RACH-request from a mobile phone. The
frequency (or a set of them) is indicated in the Immediate
Assignment message.
- Late Assignment, when the network allocates an SDCCH channel
first, where a mobile phone indicates a connection reason
(Paging Response or Service Request) and also indicates the
classmark. Then the network eventually sends the Assignment
Command message, where just like in Immediate Assignment a
new channel data (both FDMA and TDMA) are described.
BTW: please choose a proper subject for this thread and
don't interfere with the existing one because they are unrelated.
With best regards,
Vadim Yanitskiy.
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