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Hi Lorenz,

one of the reasons for the unexpected behavior you described could be the fact that your device performs a periodic Tracking Area Update (TAU). You can read about it here and here (click on 3GPP Connectivity --> Power Saving Features --> Tracking Area Updates.

I’m not an expert on this, but it seems to me that TAU is active on your module, but please double-check. Look here for more details.

TAU timer on most of NB-IoT networks in DT footprint lays between min. 1 h - 310 h. If this value was changed by you to 0, our network will automatically change it back to the minimum value of 1 hr.
You have a possibility of adjusting this value/extending the timer, as our network supports a dynamic TAU, meaning it will accept the value proposed by your UE as long as it fits into the 1-310 h window.

Dear all,

from December 6th, 2020 on, our IoT Forum will only be reachable via direct URL forum.iotcreators.com.

The former URL iotbytelekom.com, which was used to redirect you to the forum, will be phased out.
If you have any questions, let us know. Simply start a discussion in the forum or contact hello@iotcreators.com.

Thanks!

Hi Karl,
our network department is investigating this issue. We’ll get back at you asap.

@Christian Hi Christian, thanks for bearing with us. We indeed had some delay in the delivery, however based on current planning we should be able to activate it by the end of this month. We’ll be able to confirm it in the following weeks.

Currently, data packet buffering works only in combination with PSM, in the nearest future it should also work with eDRX. So once you activated this feature on your module, packets will be buffered automatically.

Hi Thomas,
sorry for late response. Please check our latest version of the Solution Guidelines, we have extended it with the information you inquired about.

BR, Aleksandra

Hi Thomas,
it seems we have some delay of the rollout of the eDRX in Germany due to technology upgrade and therefore this feature will unfortunately not be supported nationwide before 06/2020. We can however support you in your testing before the nationwide rollout, as we provide (paid) testing services in our lab in Bonn. Would that be an option for you?
BR, Aleksandra

Hi Thomas,
I believe your question relates mainly to German market. Unfortunately, the rollout plan has been adjusted meanwhile. Based on current planning, the rollout of eDRX in Germany is expected for the end of Q1/2020.

Release announcement: Activation of NB-IoT network features

Dear IoT Community,

please note that we will soon be activating new features, as well as will update the configuration of already available features in the NB-IoT network. With the transition, you’ll be able to manage your NB-IoT devices even more flexibly and efficiently. The activation is currently planned for beginning of November and will affect our networks in Austria, Czech Republic, Germany and the Netherlands.

The changes at a glance:
• Switch to dynamic Power Saving Mode (PSM) - the network will now accept the values suggested by devices
• Switch to dynamic (long-periodic) Tracking Area Update (TAU/LP-TAU) - the network will now accept the values suggested by devices
• Introduction of Data Packet Buffering - the network will buffer up to 10 data packets for the sleeping devices in the PSM

More information can be found in the attached document: Feature Release Communication

If you already use PSM and / or TAU / LP-TAU, then please note that your devices may behave differently than usual after activating the network functions. We recommend checking the settings on your devices.

If you have questions, don’t hesitate to ask in our IoT Forum!