UMTS network surveillance

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4 thoughts on “UMTS network surveillance”

  1. Hello!

     

    I’m trying to use UC864E network surveillance capabilites in UMTS band and I have two questions.

     

    1. Firstly, I switch modem to UMTS band and perform network survey:

     

    at
    OK
    at+cops=1,2,"00000",2
    OK
    at#csurv

    Network survey started …

    uarfcn: 10762 rxLev: -91 mcc: 250 mnc: 01 scr code: 128 cellId: 23678473 lac: 27
    03 cellStatus: CELL_LOW_LEVEL

    uarfcn: 10687 rxLev: -85 mcc: 250 mnc: 02 scr code: 5712 cellId: 23671097 lac: 3
    601 cellStatus: CELL_SUITABLE

    uarfcn: 10788 rxLev: -89 mcc: 250 mnc: 99 scr code: 1888 cellId: 15467688 lac: 3
    3602 cellStatus: CELL_SUITABLE

    Network survey ended

    OK

     

    Everything is OK here. Next, I’d like to look through every PLMN (usign #moni, #rfsts etc.):

     

    at+cops=1,2,"25001",2
    OK
    at+cops?
    +COPS: 1,2,"25099",2

    OK
    at#moni=0
    OK
    at#moni
    #MONI: BEE LINE PSC:118 RSCP:-90 LAC:8342 Id:0EC04A8 EcIo:-13.5 UARFCN:10788 PWR:-77dbm DRX:64 SCR:1888

    OK
    at+cops=1,2,"25002",2
    OK
    at+cops?
    +COPS: 1,2,"25099",2

    OK
    at#moni
    #MONI: BEE LINE PSC:118 RSCP:-89 LAC:8342 Id:0EC04A8 EcIo:-10.5 UARFCN:10788 PWR:-79dbm DRX:64 SCR:1888

     

     at+cops command doesn’t take effect. What should I do to select PLMN?

    2. Is is possible to obtain cell IDs of neighbour cells?

    at#csurv command seems to report info about nearest cell (selecting by RX level).

    at#moni allows to obtain some information:

     

    at#moni=2
    OK
    at#moni
    #MONI: PSC:14 RSCP:-91 EcIo:-0.0 UARFCN:10788 SCR:224
    #MONI: PSC:117 RSCP:-95 EcIo:-0.0 UARFCN:10788 SCR:1872
    #MONI: PSC:262 RSCP:-106 EcIo:-0.0 UARFCN:10788 SCR:4192

    OK
     

    but it is not contain cell IDs.

     

    1. Hi Anton,

       

      1. what is the return of AT+COPS=? ? Are other network available to select?

       

      2. maybe a solution would be to select GSM network and read cellids from there.

       

  2. Hi Anton,

     

    1. what is the return of AT+COPS=? ? Are other network available to select?

    2. maybe a solution would be to select GSM network and read cellids from there.

    1. AT+COPS=? returns following:

    at+cops=?
    +COPS: (1,"BEE LINE","BeeLine","25099",0),(1,"BEE LINE","BeeLine","25099",2),(1,"MTS-RUS","MTS-RUS","25001",0),(2,"MegaFon","MegaFon","25002",2),(1,"MegaFon","MegaFon","25002",0),(1,"MTS-RUS","MTS-RUS","25001",2),(1,"ECC","ECC","25020",0),(1,"","","25037",0),,(0-4),(0-2)

    OK

    2. Unfortunately, cell IDs of UMTS BSs are differs from IDs of GSM BSs.

     

    1. They are different, but if you want to use them for location finding purposes are still useful.

      I see in WCDMA only serving cell ID can be found.

       

      For operators selections, try to de-register first, check, register on the new operator, check – allow some time for actions to complete, check with AT+CREG.