RE: How to use GPS directly after LTE?

Hakon — Thu, 09 Jul 2020 14:31:06 GMT

Yes, I believe you can use the +CSCON command.

RE: How to use GPS directly after LTE?

anicare-tero — Thu, 09 Jul 2020 10:46:23 GMT

Is there any notification when the device is released from RRC idle that could be used as a trigger to start GPS?

RE: How to use GPS directly after LTE?

Hakon — Wed, 08 Jul 2020 16:47:25 GMT

Hello,

[quote user=""]Is there any way we can reduce this time?[/quote]

Other than reducing the active time, I don't think there is.

[quote user=""]Are there any drawbacks to a very short PSM active time?[/quote]

Aside from being reachable for a smaller amount of time by mobile terminating services, I am not aware of any drawbacks. You could in theory have a PSM active time of 0 if the network allows it.

[quote user=""]One alternative solution we have brainstormed is to set the modem to only GPS mode, and then changing it back to LTE+GPS after fix.[/quote]

If you want to instantly go from using LTE to using GPS, this is probably the way to do it. One thing to keep in mind is that reconnecting can be quite time consuming, so it is not ideal if you are sending data often. You should consider using the XBANDLOCK command if you're going with this option, to reduce the amount of time it takes to reconnect.

[quote user=""]And the GPS would be able to start searching immediately after entering?[/quote]

With eDRX there is a similar issue, which is the paging time window. This is also a parameter that can be set by the application, but it might also be restricted by the network.

[quote user=""]
What is the standard way of doing GPS search immediately after sending data over LTE?[/quote]

I'm not sure there is a standard way, you will need to go with whatever way suits your application.