Hello Luca,
On Wed, 14 Jul 2010 10:04:05 +0200, "Luca Bertoncello" bertoncello@netzing.de wrote:
Wow! It works! And I can send SMS with the NE110 phones too! Maybe could it be a solution to set lctype to GSM_LCHAN_SDCCH if the phone tried to send an SMS?
Harald probably knows the details better, but the basic problem is that the phone does not tell you exactly what channels it needs when it sends the Channel Request, at least if NECI is set to 0 (new establishment causes are not supported). So the channel allocator allocates a TCH channel, to be able to handle everything (SMS and Voice).
One solution for this is to switch from Very Early Assignment to other assignment procedures. I think Holger and Harald have plans to support this.
However there also seems to be a different solution: You can set NECI to 1, this way the phone can tell you in more detail what it wants. I have not done extensive tests, but it seems that this could solve the problem without the need to change the code. You just have to set "neci 1" in the OpenBSC configuration file.
Best regards, Dieter
Am Wed, 14 Jul 2010 11:04:01 CEST schrieb "Dieter Spaar" spaar@mirider.augusta.de:
Hi, Dieter!
Harald probably knows the details better, but the basic problem is that the phone does not tell you exactly what channels it needs when it sends the Channel Request, at least if NECI is set to 0 (new establishment causes are not supported). So the channel allocator allocates a TCH channel, to be able to handle everything (SMS and Voice).
So the theory. Unfortunately (as always!) the practice is other... :D
One solution for this is to switch from Very Early Assignment to other assignment procedures. I think Holger and Harald have plans to support this.
Aha!
I did some tests, to know which Channel Requests are sent in the specific context, and I see that OpenBSC (with neci == 0!!) get 0xE5 or 0xE6 by calling and 0xE1 by SMS sending. Unfortunately, the mask is the same, and the function get_ctype_by_chreq can't decide what the phone says...
Maybe an "if(ra == 0XE1)" will help to correct the problem, but it is a VERY BAD solution...
However there also seems to be a different solution: You can set NECI to 1, this way the phone can tell you in more detail what it wants. I have not done extensive tests, but it seems that this could solve the problem without the need to change the code. You just have to set "neci 1" in the OpenBSC configuration file.
I try with neci 1 in my config!
Thanks a lot for the suggestion!
Am Wed, 14 Jul 2010 11:14:21 +0200 schrieb Luca Bertoncello bertoncello@netzing.de:
However there also seems to be a different solution: You can set NECI to 1, this way the phone can tell you in more detail what it wants. I have not done extensive tests, but it seems that this could solve the problem without the need to change the code. You just have to set "neci 1" in the OpenBSC configuration file.
I try with neci 1 in my config!
Hi, all!
I can confirm, that "neci 1" solve my problem! I can call and send SMS without any problem, from the NE110, too!
Thanks Dieter! Your suggestion was VERY good!
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Dieter Spaar -
Luca Bertoncello