Lowest Power Communication Protocol

RE: Lowest Power Communication Protocol

Carl Richard — Thu, 17 Dec 2020 11:30:41 GMT

Hi again!

Apologies for late reply. The nRF9160 should be able to properly enter sleep while polling a socket, so I belive that's not a bad option.

Best regards,
Carl Richard

RE: Lowest Power Communication Protocol

rytabb — Fri, 11 Dec 2020 02:26:11 GMT

Hi Carl,

One more follow up if you don't mind. Hologram allows you to send raw TCP or UDP messages to any port on a connected device. They made this feature as kind of a workaround/alternative to setting up a full, private APN.

I know you aren't an expert on Hologram, but their specific technology aside, would having the device in eDRX simply listen to a port for incoming data be a good option here?

RE: Lowest Power Communication Protocol

Carl Richard — Fri, 04 Dec 2020 08:25:11 GMT

My pleasure!

Best regards,
Carl Richard

RE: Lowest Power Communication Protocol

rytabb — Thu, 03 Dec 2020 17:19:29 GMT

Thanks very much for your help, Carl.

RE: Lowest Power Communication Protocol

Carl Richard — Thu, 03 Dec 2020 10:02:37 GMT

Hi again!

I'm not very familiar with Hologram and their SMS messaging protocols, but from what I see when I read about them the SMS via Hologram Cloud requires the establishment of a TCP/IP link. This can be quite demanding when it comes to power consumption. Hence, I believe the circuit-switched SMS is the way to go.

On the note of circuit-switched SMS: We support SMS over SGs (service gateways), i.e. LTE way of implementing "circuit switched" services for SMS. Our default configuration is to attempt registration using combined procedures, i.e. by default we make an attempt to do registration also to SMS over SGs. SMS should work with our device, given that Hologram has SMS service activated in local LTE network that is providing the radio interface for Hologram(roaming agreements between Hologram and local LTE carrier).

I'm not exactly sure how the above applies to Hologram, but I recommend that you send an inquiry to them regarding this.

Best regards,
Carl Richard

RE: Lowest Power Communication Protocol

rytabb — Mon, 30 Nov 2020 20:54:34 GMT

Hi Carl,

I actually have a follow up question if you don't mind.

I am looking at using a Hologram SIM for this project, and they offer two different SMS messaging protocols.

One is circuit-switched SMS (old school, requires a dedicated number for the device) and SMS via Hologram Cloud, which is sent over data. Are either of these options, to your knowledge, fine?

My goal is to allow the network to tell the device that there is a message when it cycles, rather than having the device connect and check as I mentioned previously.

Thanks again for your help.

-Ryan

RE: Lowest Power Communication Protocol

Carl Richard — Mon, 30 Nov 2020 09:07:04 GMT

Hi again!

Then it's very understandable. Best of luck with the project!

Best regards,
Carl Richard

RE: Lowest Power Communication Protocol

rytabb — Fri, 27 Nov 2020 17:29:36 GMT

Hi Carl,

Thanks for the reply. Having latency under 5 minutes is very important and that is why we went with those settings. Glad to know SMS is the way to go. I appreciate your help.

-Ryan

RE: Lowest Power Communication Protocol

Carl Richard — Fri, 27 Nov 2020 14:39:08 GMT

Hi, Rytabb!

I do believe SMS would be the most efficient option for your case. Could I also ask, what are you latency requirements? If you don't expect the signal more often than every few months it could be a good idea to consider a longer eDRX interval, as waking up every 2.7 minutes can be quite power demanding.

Best regards,
Carl Richard