Re: [Openbts-discuss] Signal Strength

[Harvind S. <ha...@ra...>]

Hi Andrea,

There’s no uplink signal strength b/c there’s no active uplink signal.   You have to have an active transaction (voice call, GPRS session, SMS, registration, etc.) so the uplink signal is being transmitted.

Harvind Samra
Founder, CTO
Range Networks


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On Feb 27, 2016, at 6:23 AM, Andrea Iuliano <pau...@ho...<mailto:pau...@ho...>> wrote:


Hello everyone,

I am developing for a first time a simple application with OpenBTS (v5.0).

Now I am able to retrieve the list of devices with the 'tmsis' command, where I can find the IMSI/IMEI list. I wish to get the associated uplink signal strength for each device. Does anyone knows how can I do this?

I tryied two different ways.

1) the command 'chans': that returns an empty table

2) the "JSONEventsClient" app: that returns a lot of useful stuffs. Here seems that I can find what I am looking for, but every times the IMSI field has "no-MMUser" as value.

Here it is a sample log for both instructions:

OpenBTS> tmsis

IMSI     TMSI     IMEI            AUTH CREATED ACCESSED TMSI_ASSIGNED

2*****       -       3******                     2           107s          107s               0


OpenBTS> chans

CN TN chan transaction Signal SNR FER TA  TXPWR RXLEV_DL BER_DL Time IMSI

      type id          dB         pct sym dBm   dBm      pct


...:~/dev/openbts/apps$ ./JSONEventsClient

{

        "data" : {

                "burst" : {

                        "RSSI" : -27.5841,

                        "RSSP" : 0.415901,

                        "actualMSPower" : 5,

                        "actualMSTimingAdvance" : 2,

                        "timingError" : -0.312181

                },

                "channel" : {

                        "ARFCN" : 51,

                        "IMSI" : "no-MMUser",

                        "carrierNumber" : 0,

                        "timeslotNumber" : 0,

                        "typeAndOffset" : "SDCCH/4-0",

                        "uplinkFrameErrorRate" : 0

                },

                "reports" : {

                        "neighboringCells" : [],

                        "servingCell" : {

                                "RXLEVEL_FULL_dBm" : -48,

                                "RXLEVEL_SUB_dBm" : -48,

                                "RXQUALITY_FULL_BER" : 0,

                                "RXQUALITY_SUB_BER" : 0

                        }

                }

        },

        "name" : "PhysicalStatus",

        "timestamp" : "588507094",

        "version" : "0.1"

}


Thank you,

Andrea

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