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    Change of scrambling parameter

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    • afzal_m
      afzal_m iotcreators.com team last edited by afzal_m

      We finally have some new dates for the upgrade on our radio network.
      After this upgrade you’ll need to change some config parameters on your devices to match the new RAN version:

      AT+NCONFIG=CR_0354_0338_SCRAMBLING,TRUE
      AT+NCONFIG=CR_0859_SI_AVOID,TRUE

      Or (new syntax)

      AT+NCONFIG=“CR_0354_0338_SCRAMBLING”,“TRUE”
      AT+NCONFIG=“CR_0859_SI_AVOID”,“TRUE”

      The network change schedule is based on 3 regions:

      North = 16 April
      Mid = 17 April
      South = 18 April

      We will share a detailed map next week!

      1 Reply Last reply Reply Quote 0
      • A
        Andre Rodenburg last edited by

        Cool, what does the scrambling parameter do?

        afzal_m 1 Reply Last reply Reply Quote 0
        • afzal_m
          afzal_m iotcreators.com team last edited by

          Hi all! We have decided to not to divide the change in 3 regions and 3 nights.
          Change will be done during the night of tuesday 17 april to wednesday 18 april.

          A 1 Reply Last reply Reply Quote 0
          • A
            Andre Rodenburg @afzal_m last edited by

            @afzal_m

            Will the new manual be ready before tuesday?
            Btw, why did you decide to implement the new scrambling feature?

            Good luck!

            afzal_m 1 Reply Last reply Reply Quote 1
            • afzal_m
              afzal_m iotcreators.com team @Andre Rodenburg last edited by afzal_m

              @andre-rodenburg

              You can find more details regarding CR 354 and CR 338 here:

              https://portal.3gpp.org/ChangeRequests.aspx?q=1&versionId=52094&release=189

              1 Reply Last reply Reply Quote 1
              • afzal_m
                afzal_m iotcreators.com team @Andre Rodenburg last edited by afzal_m

                @andre-rodenburg said in Change of scrambling parameter:

                @afzal_m

                Will the new manual be ready before tuesday?
                Btw, why did you decide to implement the new scrambling feature?

                Good luck!

                Hey Andre,

                It is necessary for the next generations nb-iot chipsets. Later on, it will not be possible to switch scrambling off anymore.

                1 Reply Last reply Reply Quote 1
                • afzal_m
                  afzal_m iotcreators.com team last edited by

                  Another explanation:

                  https://www.ericsson.com/research-blog/robust-scrambling-nb-iot-broadcast-channels/

                  1 Reply Last reply Reply Quote 0
                  • R
                    Ruadhan last edited by

                    I’ve updated the scrambling parameter but now I get +CSQ: 99,99. Is the network already done upgrading?

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                    • afzal_m
                      afzal_m iotcreators.com team last edited by

                      Not all cells are updated yet. Apologies.

                      Just talked to my colleagues from our radio network team. It will take 3 hours from now before all cells will be updated

                      1 Reply Last reply Reply Quote 2
                      • afzal_m
                        afzal_m iotcreators.com team last edited by

                        All cells updated!

                        1 Reply Last reply Reply Quote 1
                        • R
                          Ruadhan last edited by

                          Hi, just to inform you guys, on the SARA-N11 the following is happening:

                          First apply the new scrambling parameters:

                          AT+NCONFIG=“CR_0354_0338_SCRAMBLING”,“TRUE”
                          AT+NCONFIG=“CR_0859_SI_AVOID”,“TRUE”

                          After that the APN is cleared, so you’ll have to re-apply it:

                          AT+CFUN=0
                          AT+NCDP=“172.16.14.22”
                          AT+CGDCONT=1,“IP”,“oceanconnect.t-mobile.nl”
                          AT+CFUN=1
                          AT+COPS=1,2,“20416”

                          After this, I got my device working again, check with (needs to be something else than 99,99):

                          AT+CSQ

                          I hope this helps!

                          1 Reply Last reply Reply Quote 1
                          • R
                            Ruadhan last edited by

                            Also note if you’re using the Sodaq_nbIOT library for Arduino, you’ll have to change the Sodaq_nbIOT.cpp manually. (Hopefully SODAQ will update them soon.)

                            From these values on row 80:

                            const uint8_t nConfigCount = 6;
                            static NameValuePair nConfig[nConfigCount] = {
                            { “AUTOCONNECT”, “FALSE” },
                            { “CR_0354_0338_SCRAMBLING”, “FALSE” },
                            { “CR_0859_SI_AVOID”, “FALSE” },
                            { “COMBINE_ATTACH” , “FALSE” },
                            { “CELL_RESELECTION” , “FALSE” },
                            { “ENABLE_BIP” , “FALSE” },
                            };

                            To these:

                            const uint8_t nConfigCount = 6;
                            static NameValuePair nConfig[nConfigCount] = {
                            { “AUTOCONNECT”, “FALSE” },
                            { “CR_0354_0338_SCRAMBLING”, “TRUE” },
                            { “CR_0859_SI_AVOID”, “TRUE” },
                            { “COMBINE_ATTACH” , “FALSE” },
                            { “CELL_RESELECTION” , “FALSE” },
                            { “ENABLE_BIP” , “FALSE” },
                            };

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