Re: [Openlte-discuss] decoding SIB1
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Re: [Openlte-discuss] decoding SIB1
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From: Ben W. <bwo...@gm...> - 2013-04-08 21:55:24
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Victor, It is not always guaranteed to be format 1A. It could also be format 1C. However, I have not seen any recordings using 1C. Hope this helps, Ben On Apr 7, 2013 2:00 PM, <vma...@te...> wrote: > > Ben, > > One more question along this lines, will the DCI for the SIB1 always be of > format 1A? > > Thanks, > > -Victor > > > El Ju 04/04/13 19:24, vma...@te... escribió: > > > Ben, > > > > > > Yes, that makes sense. > > > > > > What I am seeing is that the SIB 1 for the signal I am processing with > OpenLTE is encoded with DCI format1A. Since it is not flagged as having > format 0 and none of the other SIBs are being decoded, I do not see any of > the other messages. > > > > > > Thanks again, > > > > > > -Victor > > > > > > > > > El Ju 04/04/13 19:04, Ben Wojtowicz <bwo...@gm...> escribió: > > > Victor, > > > Yes, the gnuradio app will try to decode DCIs in all subframes until all > SIBs that are broadcast are decoded. The octave code should have the same > prints, but it will only try to decode DCIs until SIB1 is decoded. > > > > > > Hope this helps, > > > > > > Ben > > > On Apr 2, 2013 4:04 PM, <vma...@te...> wrote: > > > > > > Hi Ben, > > > > > > I just noticed that the file scanner gnuradio app outputs the following > lines: > > > > > > DCI 1C FOUND L = 4, 1 > > > > > > ERROR: DCI 1A flagged as DCI 0 > > > > > > DCI 1C FOUND L = 4, 1 > > > > > > DCI 1C FOUND L = 8, 0 > > > > > > DCI 1C FOUND L = 4, 3 > > > > > > DCI 1C FOUND L = 8, 0 > > > > > > DCI 1C FOUND L = 8, 0 > > > > > > but none of this shows up with OpenLTE. > > > > > > Is this because of the file scanner's capability to decode more SIBs? > > > > > > Thanks, > > > > > > -Victor > > > > > > El Lu 04/03/13 03:10, Ben Wojtowicz <bwo...@gm...> escribió: > > > > > > Victor, > > > > > > Sorry for the delay, but I just tried decoding the data you provided > with the file scanner (V00.08.00) and it decoded. Here is the decoded > output: > > > > > > DL LTE Channel found [0]: > > > > > > MIB Decoded: > > > > > > Frequency Offset = -1.53 > > > > > > System Frame Number = 255 > > > > > > Physical Cell ID = 145 > > > > > > Number of TX Antennas = 2 > > > > > > Bandwidth = 10MHz > > > > > > PHICH Duration = Normal > > > > > > PHICH Resource = 1 > > > > > > SIB1 Decoded: > > > > > > PLMN Identity List: > > > > > > 311-480, Verizon, not reserved for operator use > > > > > > Tracking Area Code = 18432 > > > > > > Cell Identity = 18523906 > > > > > > Cell Barred = Not Barred > > > > > > Intra Frequency Reselection = Allowed > > > > > > CSG Indication = FALSE > > > > > > Q Rx Lev Min = -120dBm > > > > > > Q Rx Lev Min Offset = 8dB > > > > > > P Max = 23dBm > > > > > > Frequency Band = 13 > > > > > > SI Window Length = 20ms > > > > > > Scheduling Info List: > > > > > > SI Periodicity = 16 frames > > > > > > SI Window Starts at N_subframe = 0, SFN mod 16 = 0 > > > > > > SIB Type = 2 > > > > > > SIB Type = 3 > > > > > > SI Periodicity = 64 frames > > > > > > SI Window Starts at N_subframe = 0, SFN mod 64 = 2 > > > > > > SIB Type = 4 > > > > > > SIB Type = 8 > > > > > > Duplexing Mode = FDD > > > > > > SI Value Tag = 19 > > > > > > SIB4 Decoded: > > > > > > List of intra-frequency neighboring cells: > > > > > > Physical Cell ID = 64 > > > > > > Q Offset Range = 3dB > > > > > > SIB8 Decoded: > > > > > > Search Window Size = 10 > > > > > > Pre Registration = Not Allowed > > > > > > Band Class List: > > > > > > Band Class = 0 > > > > > > Cell Reselection Priority = 2 > > > > > > Threshold X High = 16 > > > > > > Threshold X Low = 14 > > > > > > Neighbor Cell List: > > > > > > Band Class = 0 > > > > > > Neighbor Cells Per Frequency List > > > > > > ARFCN = > 630 > > > > > > Phys Cell ID List > > > > > > 216 > > > > > > 48 > > > > > > 384 > > > > > > 40 > > > > > > 376 > > > > > > 212 > > > > > > T Reselection = 5s > > > > > > T-Reselection Scale Factor Medium = 0.25 > > > > > > T-Reselection Scale Factor High = 0.25 > > > > > > DCI 1C FOUND L = 4, 1 > > > > > > ERROR: DCI 1A flagged as DCI 0 > > > > > > PAGING MESSAGE RECEIVED: > 01000000000000111001110001000000111000101001111010100000 > > > > > > DCI 1C FOUND L = 4, 1 > > > > > > DCI 1C FOUND L = 8, 0 > > > > > > DCI 1C FOUND L = 4, 3 > > > > > > DCI 1C FOUND L = 8, 0 > > > > > > PAGING MESSAGE RECEIVED: > 01000000000000111001110011000000001100110001110001100000 > > > > > > DCI 1C FOUND L = 8, 0 > > > > > > PAGING MESSAGE RECEIVED: > 01000000000000111000110011000000111011111101110100110000 > > > > > > SIB2 Decoded: > > > > > > Number of RACH Preambles = 56 > > > > > > Power Ramping Step = 6dB > > > > > > Preamble init target RX power = -104dBm > > > > > > Preamble TX Max = 3 > > > > > > RA Response Window Size = 5 Subframes > > > > > > MAC Contention Resolution Timer = 64 Subframes > > > > > > Max num HARQ TX for Message 3 = 3 > > > > > > Modification Period Coeff = 2 > > > > > > Default Paging Cycle = 128 Frames > > > > > > Modification Period = 256 Frames > > > > > > nB = 128 Frames > > > > > > Root Sequence Index = 1 > > > > > > PRACH Config Index = 4 > > > > > > Preamble Format = 0, RACH SFN = Any, RACH Subframe Number = 4 > > > > > > High Speed Flag = Unrestricted Set > > > > > > Ncs Configuration = 9 > > > > > > PRACH Freq Offset = 2 > > > > > > Reference Signal Power = 18dBm > > > > > > Pb = 1 > > > > > > Nsb = 1 > > > > > > Hopping Mode = Inter Subframe > > > > > > PUSCH Nrb Hopping Offset = 4 > > > > > > 64QAM = Not Allowed > > > > > > Group Hopping = Enabled > > > > > > Group Assignment PUSCH = 0 > > > > > > Sequence Hopping = Disabled > > > > > > Cyclic Shift = 0 > > > > > > Delta PUCCH Shift = 2 > > > > > > N_rb_cqi = 1 > > > > > > N_cs_an = 0 > > > > > > N1 PUCCH AN = 6 > > > > > > SRS Bandwidth Config = 0 > > > > > > SRS Subframe Config = 0 > > > > > > Simultaneous AN and SRS = True > > > > > > SRS Max Up PTS = False > > > > > > P0 Nominal PUSCH = -82dBm > > > > > > Alpha = 0.8 > > > > > > P0 Nominal PUCCH = -114dBm > > > > > > Delta F PUCCH Format 1 = 0dB > > > > > > Delta F PUCCH Format 1B = 3dB > > > > > > Delta F PUCCH Format 2 = 0dB > > > > > > Delta F PUCCH Format 2A = 0dB > > > > > > Delta F PUCCH Format 2B = 0dB > > > > > > Delta Preamble Message 3 = 0dB > > > > > > UL CP Length = Normal > > > > > > T300 = 400ms > > > > > > T301 = 1500ms > > > > > > T310 = 1000ms > > > > > > N310 = 1 > > > > > > T311 = 5000ms > > > > > > N311 = 1 > > > > > > UL ARFCN = 23230 > > > > > > UL Bandwidth = 10MHz > > > > > > Additional Spectrum Emission = 1 > > > > > > Time Alignment Timer = 2560 Subframes > > > > > > I'll see if I can dig into what is wrong with the octave code and update > it. > > > > > > Thanks, > > > > > > Ben > > > > > > On Wed, Feb 20, 2013 at 9:27 AM, <vma...@te...> wrote: > > > > > > Ben, > > > > > > I double checked, the collect is actually 1 sec worth of data. > > > > > > Best, > > > > > > -Victor > > > > > > El Mi 20/02/13 02:47, vma...@te... escribió: > > > > > > > > > > > > > > Ben, > > > > > > > > > > > > > > You can find the LTE data collect here: > > > > > > > http://dl.dropbox.com/u/105689861/LTE.mat > > > > > > > > > > > > > > It is 100 ms worth of data sampled at 30.72 MHz. > > > > > > > > > > > > > > I will try scanning it with gnuradio soon. > > > > > > > > > > > > > > Best, > > > > > > > > > > > > > > -Victor > > > > > > > > > > > > > > > > > > > > > El Lu 18/02/13 02:14, Ben Wojtowicz escribió: > > > > > > > Victor, > > > > > > > > > > > > > > The file scan gnuradio app is part of openLTE. You can follow the > build instructions in the README file and then run it using > LTE_fdd_dl_file_scan.py. > > > > > > > > > > > > > > For the upload, you could try a site like dropbox. > > > > > > > > > > > > > > Ben > > > > > > > > > > > > > > On Thu, Feb 14, 2013 at 10:31 AM, <vma...@te...> wrote: > > > > > > > > > > > > > > Ben, > > > > > > > > > > > > > > No, I have not used the scan gnuradio app. Do you know where I can > find it? > > > > > > > > > > > > > > Also, is there a place where I can upload the file? It is 463 MB. > > > > > > > > > > > > > > Regards, > > > > > > > > > > > > > > -Victor > > > > > > > > > > > > > > El Mi 13/02/13 18:47, Ben Wojtowicz escribió: > > > > > > > > > > > > > > Victor,Im not sure if I have ever tried decoding with a PCFICH of 3, > so there may be a bug. Also, have you tried running the file scan gnuradio > app with this data? The octave code hasn't been kept up to date with all > of the new changes to the gnuradio apps. If you dont mind, could you post > the data file you are using? > > > > > > > > > > > > > > Thanks, > > > > > > > BenOn Feb 13, 2013 7:59 AM, <vma...@te...> wrote: > > > > > > > > > > > > > > Hello, I have collected some over the air data and used the OpenLTE > scripts to try to decode the SIB1. > > > > > > > However, it seems that the script only decodes the PCFICH correctly > since I obtain a value of 3 and that it breaks somewhere along the way > before decoding the SIB1. The following is the output that I get after > running OpenLTE on the collected data: > > > > > > > > > > > > > > Found PSS-1 in 26 (71.493915)Found SSS-48, 0 index is 196423, cell_id > is 145Found BCH, N_ant = 2, N_rb_dl = 50, phich_duration = normal, > phich_resource = 1, sfn = 854ERROR: SIB1 PDCCH NOT FOUND > > > > > > > > > > > > > > Does anybody have any ideas as to why I cannot decode the SIB1? > > > > > > > Best regards, > > > > > > > -Victor > > > > > > > > > > > > > > > ------------------------------------------------------------------------------ > > > > > > > > > > > > > > Free Next-Gen Firewall Hardware Offer > > > > > > > Buy your Sophos next-gen firewall before the end March 2013 > > > > > > > and get the hardware for free! Learn more. > > > > > > > http://p.sf.net/sfu/sophos-d2d-feb > > > > > > > > > > > > > > _______________________________________________ > > > > > > > Openlte-discuss mailing list > > > > > > > Ope...@li... > > > > > > > https://lists.sourceforge.net/lists/listinfo/openlte-discuss > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > |
