Location Information length in the terminal reponse of PROVIDE LOCAL INFORMATION

Question

why the length of Location Information is different? when I ask location info using PROVIDE LOCAL INFORMATION, the length of Location Information is 7 sometimes, and it is 9 sometimes. like this:

//Terminal Response

8014000015810301260002028281030106130764F01010D9286C; SW=910B

//Terminal Response

8014000017810301260002028281030106130964F010A05D3C49006D; SW=9000

can anyone tell me which spec to check?

Answer 1

ETSI TS 102 223 defines the Provide Local Information components. It mentions that the location information portion will be "Access technology specific" in section 8.19.

If we look at 3GPP TS 31.111 we see again in section 8.19 that location information could have length "09", "07", "05", "00". The note describe under which circumstances the different lengths are found.

Note 1 
The Extended Cell Identity Value is not available in GERAN. When in GERAN, 
this field shall not be present and the length field shall be set to ‘07’.

I believe when you are executing the provide local information query, you could at times be in a GSM, EDGE, UMTS or LTE zones and for each access technology the information is different.

Kind Regards,