- This topic has 6 replies, 1 voice, and was last updated 12 years, 11 months ago by
paraHO.
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toofy
Guestwhat’s the logical canal used for the paging of the mobile for the second Call.(FCCH, FACCH or PCH)
ThksPix
GuestI don’t think there is paging, because the MS is in dedicated mode, the MSC already knows in which cell the MS is located. There is no need of a paging.
But I don’t know exactly how is established a second call. That’d be interesting to know. I would say that the MSC will simply send an alerting message on the FACCH or SACCH… (?)paraHO
Guesttoofy are you talking about the user switching between two separate calls to talk or a conference call between the user and two callers?
toofy
Guestit’s not a conf call, but a second call when the first call is already handled
paraHO
Guesttoofy, ok there are still the points:
– did MS dial both calls (outgoing)
– did MS dial one call (outgoing) and other call is incoming
– did MS receive both calls (incoming)I looked at Call Waiting (GSM0383) as MS needs notification that a call is there to know to answer it. Also Call Hold (GSM0383) would be relevant as you say no multiparty (conference call) in progress (GSM0384)
As dual call appear to be supplementary services there is a trade of information between HLR and VLR. As one call is already in progress it would appear the second call would be route through same Mast as the one currently handling call. There appear no PCH required as HLR and VLR know where MS user located.
What I have not found out yet is where additional assignment (GSM0408) is sent on FACCH or SACCH etc…
toofy
Guestthat’s my question paraHO:
where additional assignment (GSM0408) is sent on FACCH or SACCH etc…paraHO
Guesttoofy I need to be sure I understand what you say first. I maybe slow thinking but I get there in the end 🙂
I am looking for FACCH/SACCH etc and will reply as soon as possible. I think Pix know more than me, but i will try to find out..
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