- This topic has 5 replies, 1 voice, and was last updated 10 years, 5 months ago by pix.
4th October 2010 at 08:38 #64523Si2/5Guest
I have a question what will happen if I define one cell to whom all naighour definitions are SI5 but without SI2 (cell is allowed for HO but no reselections). Now MS performs an HO to this cell and ends call there. Will it camp on this cell or based on stored SI2 will perform an immediate cellreselection back to strongest cell?4th October 2010 at 11:33 #64524pixGuest
Acall release, the MS camps on the current serving cell. So whether there was HO or not before, it doesn’t matter : the current cell is the serving cell.
Based on reselection parameters, the MS will decide to stay in that cell or not : the MS is only looking at the SI2 list from the current serving cell.
pix4th October 2010 at 12:00 #64525Si2/5Guest
But if this cell is in state Barred? After call released MS will perform cell reselection based on what list? SI2 received from current cell, SI2 stored from previous cell or SI5 received from current cell?4th October 2010 at 13:39 #64526pixGuest
ms will reselect a cell based on current serving SI2.
why didn’t you say the cell was barred in the first place ?4th October 2010 at 14:12 #64527Si2/5Guest
I didn’t say it because I haven’t thougth about it then yet 🙂 It’s all, at the moment, is only in my head, not in network.
Regading reselection – Does MS really needs to listen and store SI2 in dedicated mode? I allways thougth that SI5 for MS in dedicated mode is enougth and it’s starts to listen to SI2 only after call release.
Also in this situation MS must allready know where to reselect because after moving to idle state it’s must immediatelly reselect after receiving first SI containing info that Cell is barred. Please coorect me if I am wrong.
Maybe you can tell me GSM specs where I could find it?4th October 2010 at 19:11 #64528pixGuest
well, when the ms is in dedicated mode, it gets all the SI msg on the SACCH. At call release, it already knows what are the neighbours in dedicated mode (si5) and in idle mode (si2), and the fact that the cell is barred : all this was sent during the call, on the sacch.
Regarding the 3GPP… good luck 🙂
Look in series 4x
– for doc titles with “idle mode”
(there are 2 of them, one about “non access stratum”)
– for doc titles with “multiplexing”
– “link control”