AGPS_THINGY91

[Hoang]

Dear

I am testing AGPS with my THINGY91 

SIMCARD: TELIA /Norway 

I got the output report:

** Boor[1B][1;1H[1B][2JNew AGPS data requested, contacting SUPL server, flags 59
Established LTE link
ip 6cb1:fc0:: (c00fb16c) port 7276
Starting SUPL session

ULP encoding length: 38
Bytes sent: 38
Bytes received: 34
ULP ossDecode success, choice 3
SUPL server responded using version 2.0.4
SUPL response received
ULP encoding length: 57
Bytes sent: 57
Bytes received: 708
ULP ossDecode more input 4
Bytes received: 1416
ULP ossDecode more input 4
Bytes received: 2124
ULP ossDecode more input 4
Bytes received: 2832
ULP ossDecode more input 4
Bytes received: 2994
ULP ossDecode success, choice 5
Injected AGPS data, flags: 1, size: 16
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 2, size: 72
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
Injected AGPS data, flags: 3, size: 32
No integrity data available
Injected AGPS data, flags: 4, size: 8
Injected AGPS data, flags: 6, size: 144
No location data available
Injected AGPS data, flags: 7, size: 16
MCC location info injected, MCC: 242
	Lat: 6407964 Lon: 715361
	Unc semiminor: 127
	Unc semimajor: 117
	Confidence: 85
	Orientation: 0
SUPL POS received
read again
read again
read again
read error: -1
ULP ossDecode fail 5
SUPL error: 1
ULP encoding length: 34
Sending SUPL message failed, bytes_sent: -1
SUPL session internal resources released
SUPL session finished
Done

Could you tell me what is the problem? Telia SIMCard?

Thanks, 

BR

Hoang Nguyen

[Hoang]

Dear Håkon Alseth

Another thing, 

MCC location info injected, MCC: 242
	Lat: 6407964 Lon: 715361
	Unc semiminor: 127
	Unc semimajor: 117
	Confidence: 85
	Orientation: 0

The position is determined from MCCMNC: 

    Lat: 6407964 Lon: 715361 

How can we find the position from these values? 

Is it how AGPS can: Indoors location acquisition? 

Thanks, 

Mvh

Hoang Nguyen

[Håkon Alseth]

Hoang said:

Lat: 6407964 Lon: 715361 

Its a generic lookup based on the MCC (country code).

 

Hoang said:

Is it how AGPS can: Indoors location acquisition? 

AGPS will help you get ephemeris and almanac, which will help in terms of time to first fix, but it will not help if there is no GPS signal to receive. Getting acq. indoors is the same with AGPS as without. 

 

Could you tell me what is the problem? Telia SIMCard?

 Do you get those errors every time you boot? I tried with an older sim I have here, but cannot seem to replicate this behavior.

 

Kind regards,

Håkon

[Hoang]

Håkon Alseth said:

Its a generic lookup based on the MCC (country code).

How can I convert them (Lat: 6407964 Lon: 715361 ) to the values which can use in https://www.google.com/maps to find my position

Håkon Alseth said:

Do you get those errors every time you boot? I tried with an older sim I have here, but cannot seem to replicate this behavior.

I used Telia SIMcard for all my applications with the old_version of ncs_1.0.0 (joakim), and it worked well. 

With the AGPS, I updated new ncs and new Modem FW, but it couldnt work with Telia SIMCard

I changed to Telenor SIMcard, it worked now. 

Thanks 

MVH

Hoang Nguyen

[Håkon Alseth]

Hi Hoang,

 

It fails to find your specific cell tower, then falls back to a generic location according to the country code (MCC). The data is printed in a non-intuitive way, and I will report this internally.

 

Kind regards,

Håkon

[Hoang]

Thanks so much, Håkon Alseth

I spent a long time to find the meaning of this "non-intuitive" data.............

MVH

Hoang Nguyen

[Håkon Alseth]

Hi Hoang,

 

Hoang said:

I spent a long time to find the meaning of this "non-intuitive" data.............

I am very sorry to hear this. My apologies for the inconvenience, I will make sure that we stop printing magic numbers in this way!

When it prints "No location data available" it will default to a defined area for your MCC. The default location it injects will still help wrt. the time to first fix.

 

Kind regards,

Håkon

[Hoang]

Hi Håkon Alseth

The first time, i thought these parameters are extracted from: location api https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_link_monitor%2FUG%2Flink_monitor%2Flm_locationapi.html

as nRF Connect -LTE Link  Monitor