[srslte-users] Recieving further SIB messages

[Enes ÜNAL]

Hello Ismail,

I just tried to get some logs, but I think it's almost impossible since my
CPU is not a good one and intensive logging lead the UE to not catching any
SIB1 message.

Let me help you to understand the issue with something else,

In SIB1, I see SIB2, SIB3, SIB5 messages are broadcasting with
periodicities rf16, rf32, rf32 and the SI window size is read as 40.

By that, I added some more `case`s to the switch in rrc::sib_search, to get
SIB3, SIB4 and SIB5.

There is no problem with SIB3, and since there is no SIB4 message currently
broadcasting from E-UTRAN; I'm switching SIB5 message retrieval case.  For
that, I'm calling mac_interface_rrc::bcch_start_rx with si_win_start
[=sib_start_tti(tti, 32, 0)], and si_win_len [=si_window_length in SIB1].

Examples

********************************************************
tti: 6490, period: 32, siwinst: 6720, siwinlen: 40
********************************************************
tti: 7055, period: 32, siwinst: 7360, siwinlen: 40
********************************************************
tti: 7142, period: 32, siwinst: 7360, siwinlen: 40
********************************************************
tti: 7166, period: 32, siwinst: 7360, siwinlen: 40
********************************************************

Also I tried to decode the messages retrieved by rrc::write_pdu_bcch_dlsch
with compiled asn's. For that at the start of this method I added just a
couple of lines to get the data.

FILE *f = fopen(fname, "w");
fwrite(pdu->buffer, 1, pdu->N_bytes, f);

I'm attaching some of these files to this mail. As I decoded, I cannot see
any SIB5 messages in these recorded raw data. I've used the procedure
explained in the following link:
http://sdr-x.github.io/LTE-SIB-decoding-by-asn1c/

I tried this with 8 different frequencies and ~30 different physical cell
ids. Could not get just one SIB5 message.

The first thing I want to know if you can get any SIB4, SIB5 etc. messages
before?

The second one I want to ask about is what is the system requirements to
run the UE flawlessly?

Thank you for your interest and support,
Best,
Enes.

2016-05-25 19:59 GMT+03:00 Ismael Gomez <
ismael.gomez at softwareradiosystems.com>:

> Hi Enes,
>
> your approach is correct. Can you provide the logs of your execution? Set
> the log level to info for all layers in the ue.conf file.
>
> thanks
>
> On Wed, 25 May 2016 at 08:49 Enes ÜNAL <aenesunal at gmail.com> wrote:
>
>> Hello,
>>
>> First I should thank for all of the great work done by SRS.
>>
>> I'm SDR hobbyist student and currently experimenting srsUE. When I went
>> into deep, and read about the LTE standard specs, learnt that other System
>> Information Broadcast Messages is also broadcasting from the real LTE
>> networks. Then I decided to get some of it. As I see, SIB1 and SIB2 are
>> currently being read by srsUE RRC.
>>
>> From there, I could get the SchedulingInfoList from SIB1 message. And saw
>> that eNB is set to broadcast SIB2, SIB3, SIB5, etc. Then with some
>> additions, I tried to get other SIB messages. This work lead me to
>> successfully get SIB3 messages with the same window with SIB2. However when
>> I try to get SIB5 message, even if I
>> called mac_interface_rrc::bcch_start_rx with correct windows start and
>> length; there is no SIB5 message type is retrieved.
>>
>> Did anyone try it before, or it's not tested? Should I go deep into
>> liblte_rrc?
>>
>> Thank you,
>> Best,
>> Enes.
>> _______________________________________________
>> srslte-users mailing list
>> srslte-users at lists.softwareradiosystems.com
>> http://www.softwareradiosystems.com/mailman/listinfo/srslte-users
>>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20160526/fd0783c4/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: xd8.bin
Type: application/octet-stream
Size: 37 bytes
Desc: not available
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20160526/fd0783c4/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: xf0.bin
Type: application/octet-stream
Size: 37 bytes
Desc: not available
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20160526/fd0783c4/attachment-0001.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: xe9.bin
Type: application/octet-stream
Size: 37 bytes
Desc: not available
URL: <https://lists.srsran.com/pipermail/srsran-users/attachments/20160526/fd0783c4/attachment-0002.bin>