Geo positioning through LTE network

[Grigor]

Hi.

We have developed custom device based on nRF9160 and we are facing a some problems related with GPS fixing. Sometimes it takes hours to fix, even we are getting signal from more than 7 satellites. The solution for this issue, in my understanding, is to use A-GPS which should be released at the end of Q2.

https://devzone.nordicsemi.com/f/nordic-q-a/61326/nrf9160-gps-configurations-and-fixing-issues

As temporary solution for A-GPS and as a alternative solution in indoor environments we would like to use LTE geo positioning feature.

According to this discussion, we need to get some parameters of LTE connection

https://devzone.nordicsemi.com/f/nordic-q-a/44093/nrf9160-dk-geolocation-through-lte

Some of them we are getting by command %NBRGRSRP, but beside the parameters that we are getting by this command we need MCC, MNC, LAC and CID as well.

The command %XOPNAME returnes an error.

The questions are:

1. How I can get MCC, MNC, LAC and CID?

2. Is there any direct way to convert these parameters into Latitude and Longitude rather than to use https://locationapi.org/ API?

3. As a response to the command %NBRGRSRP, I'm getting these values "70,5780,36,346,5780,34" and for +CEREG: 5,"8757","08882910",7,,,"00011110","11100000".

According to the

https://locationapi.org/api#documentation

I filled  the request form

{
    "token": "xxxxxxxxxxx",
    "radio": "lte",
    "mcc": 295,
    "mnc": 05,
    "cells": [{
        "lac": 5,
        "cid": 143141136,
        "psc": 0
    }],
    "address": 1
}

But I got an error. What I filled wrongly?

Thanks.

[Heidi]

Hi!

The solution for this issue, in my understanding, is to use A-GPS which should be released at the end of Q2.

A-GPS has already been released both in the NCS v1.2 and the master branch. Check out the GPS sample in NCS, which uses the SUPL client library to enable assisted GPS. You can read more about the SUPL client library here.

Since you mentioned LTE geo-positioning feature was merely a temporary solution, I imagine you'll focus on adding A-GPS instead. I will answer your other questions if you want, just let me know! 

Best regards,

Heidi