Am Di 2. Dezember 2008 schrieb Dieter Spaar: > Hello Stefan, > > Stefan Schmidt wrote: > > To follow up on the #1024 traces. I fear you are still not able to reproduce the > > re-camping? > > > > No, I cannot reproduce it here. It seems that it requires a special GSM > net situation. > > From the PCO2 logs you made, it look like this without applying the > AT%SLEEP=2 workaround (Thank you for allowing to post this trace > overview). All times are relative, CID is the cell ID: > > 00:06:04:667 MMR_REG_CNF received: LAC: 0020, CID: DACC > 00:09:37:249 MMR_REG_CNF received: LAC: 0020, CID: DAB8 > 00:11:45:560 MMR_REG_CNF received: LAC: 0020, CID: 00CA > 00:12:41:293 MMR_REG_CNF received: LAC: 0020, CID: C834 > 00:14:24:681 MMR_REG_CNF received: LAC: 0020, CID: DACC > 00:14:48:234 MMR_REG_CNF received: LAC: 0020, CID: DAB8 > 00:15:23:502 MMR_REG_CNF received: LAC: 0020, CID: 00C0 > 00:16:22:414 MMR_REG_CNF received: LAC: 0020, CID: DACC > 00:16:49:465 MMR_REG_CNF received: LAC: 0020, CID: 00CA > > It seems that you have at least five cells for your network around > which can be received with a similar level. [ Hey, I think I have > buy more BS-11 base stations and install all of them to get > something similar here ;-) ] > > On a first look the cell re-selections are done because > the GSM modem has decided that a different cell is better > than the current one. I would say that this is not necessarily > a wrong behavior of the GSM modem.
Please check C1/C2 threshold levels. Usually this *is* an erratic behaviour of GSM. > > The situation is similar with the AT%SLEEP=2 workaround applied: > > 00:03:44:457 MMR_REG_CNF received: LAC: 0020, CID: DAB8 > 00:03:58:336 MMR_REG_CNF received: LAC: 0020, CID: 00CA > 00:04:32:477 MMR_REG_CNF received: LAC: 0020, CID: DACC > > (The trace is shorter so there are not that many cell re-selections). So we see the same unpleasant behaviour here as well :-( Seems sleep=2 won't stop it. Is this really an active complete cell reselect? Could you check if there's GSM TX activity each time we see "MMR_REG_CNF received:" please. cheers jOERG
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