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    Limited Data Rate after to many messages on aday?

    Network & Coverage
    nb-iot limitations data rate signal
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    • T
      Timo Siekmann last edited by Aleksandra Klinkner

      Re: Maximum number of messages per day

      Hello, I figured out in a former topic [504], that the number of total daily messages schould not be higher then 120? What happenend if the number of daily messages overshoot this number? Is there any type of limitations in the datarate? Because I have tremendous shifts in my datarate and ping times.

      Best Regards Timo

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      • afzal_m
        afzal_m iotcreators.com team last edited by

        Hi Timo. It depends. Where did you get your simcard? If you got it from iotcreators.com then, yes, there is a guideline of 120 messages per day max.

        However, currently there are no technical limitations and no financial implications.

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          Timo Siekmann @afzal_m last edited by

          @afzal_m Thanks for the quick answer, I got these sim cards at 1nce. Should be the same with Telekom?

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          • afzal_m
            afzal_m iotcreators.com team last edited by

            Yes, but so far it is just a recommendation. On radio network layer nothing happens if you exceed it.

            But I don’t know what happens on a higher layer with 1NCE simcards. Sorry 😞

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            • Uta
              Uta iotcreators.com team last edited by

              I’m in contact with a colleague and will post an answer hopefully tomorrow latest.

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                Timo Siekmann @Uta last edited by

                @Uta Thank you that’s really kind. Maybe the images of different ping delays would help you? I use the BG96 Board in combination with a Raspberry Pi. Most of the time it works as expected, but sometimes a get tremendous delays.
                I tried, to ping some different serves with no success.

                I attached two graphics, one of a normal ping and one of a “really slow” Ping.

                PING_CELL_425_1nce_normal_latency.jpg
                PING_CELL_425_1nce_high_latency.jpg

                Best Regards Timo.

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                • Uta
                  Uta iotcreators.com team last edited by

                  Hi Timo, as @afzal_m mentioned nothing will happen on radio network layer. While using a 1NCE SIM simply the prepaid data volume will be consumed and you might need to top up soon - depending on message size of course.
                  Please review §7.8 in the 1NCE T&C for proper use of their SIM and possible impact/consequences.

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                  • Uta
                    Uta iotcreators.com team @Timo Siekmann last edited by

                    @Timo-Siekmann are these tests from exact the same location?

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                    • Uta
                      Uta iotcreators.com team @Uta last edited by

                      we experience this kind of behavior sometimes under poor network condition (weak signal). what CE-level did your module show?

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                        Timo Siekmann @Uta last edited by

                        @Uta It depend on the Location of my devices, it shifts between CE0 (i.e. RSRP -100 dBm) and CE2 (i.e. over -125 dBm).

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                          Timo Siekmann @Uta last edited by

                          @Uta Yes the issue occurred at the same location. But it occurs non-periodic.

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                            Timo Siekmann last edited by

                            @Uta Hello Uta do you have any news for me?

                            Best Regards Timo

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                            • R
                              Ronan Lacroix iotcreators.com team last edited by

                              Hi Timo,

                              Those strong delays are most probably a consequence of the weak network signal strength at your test location.

                              In CE-Level 2, the device has to repeat the same signal over the radio interface multiple times (up to 2048 repetitions in downlink, and 128 repetitions in uplink!) in order to enhance the link budget and ensure a successful signal transmission.
                              This has a direct impact on both the data throughput and the communication latency, which you see reflected in the Ping RTT.

                              This can be solved by improving the signal quality, for instance by changing the location of the device or by using a better antenna.

                              Best regards,

                              Ronan

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                              • S
                                Stefan de Lange @Timo Siekmann last edited by

                                @Timo-Siekmann Hi Timo, just to let you know, I have seen latency up to 30 seconds in extremely poor conditions (RSRP < -130 dBm). So what you are seeing is expected at those low RSRP levels. If you were to plot this on a graph you would see a correlation between ping and RSRP (and EC level).

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                                  Timo Siekmann @Ronan Lacroix last edited by

                                  @Ronan-Lacroix Ronan Thanks for your quick response. I tried different location as well with no impact to the irregular signal disorders. They also occur at good channel conditions (e.g RSRP= -90 dBm). I totally understand that the latency is going up with a weaker channel condition. But what I have concern about, that it also occur with good channel condition.

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                                    Timo Siekmann @Stefan de Lange last edited by

                                    @Stefan-de-Lange Thank you Stefan, but I have the same issues with good channel conditions. My other devices with other MNO Sim Cards works without any trouble.

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                                    • S
                                      Stefan de Lange @Timo Siekmann last edited by

                                      @Timo-Siekmann I suggest you enable debug information on the module. There are several commands like AT+CEREG, AT+CSCON that can help you determine what’s happening at the radio access level (they may be called different on your module). If you have a module that supports L1, L2, L3 logging via a PC tool that will be even more helpful. You may also plot the current to see where the transmit peaks are to determine if the radio’s behavior is correct.

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                                      • T
                                        Timo Siekmann @Stefan de Lange last edited by

                                        @Stefan-de-Lange Hi Stefan, I tried the commands (AT+CEREG, AT+CSCON ). The output of AT+CEREG was 0,5, regarding the Quectel docs I think 5 could be “Registered, roaming”, should be ok. My other device with vodafone SIM Card gives the same feedback.

                                        The output of AT+CEREG was “ERROR”, maybe the Quectel BG96 doesn’t support this command. Because it isn’t in the docs of it.

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                                        • S
                                          Stefan de Lange @Timo Siekmann last edited by

                                          @Timo-Siekmann said in Limited Data Rate after to many messages on aday?:

                                          Quectel BG96

                                          Hi, please try:

                                          AT+QCSCON=1
                                          AT+CEREG=4

                                          I highly suggest to plot the current too.

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