ts_125331v120300p

3GPP TS 25.331 version 12.3.0 Release 12
589
ETSI TS 125 331 V12.3.0 (2014-10)
1> store this IE in the IE "UE positioning GPS UTC model" in variable UE_POSITIONING_GPS_DATA.
8.6.7.19.4 UE positioning Ciphering info
The UE shall:
1> if deciphering information is received from higher layers for deciphering of GPS assistance data broadcast on
system information:
2> store the current key in IE "Current deciphering key" in variable UE_POSITIONING_GPS_DATA;
2> store the next key in IE "Next deciphering key" in variable UE_POSITIONING_GPS_DATA;
2> store the ciphering key flag in UE_POSITIONING_GPS_DATA.
1> if deciphering information is received from higher layers for deciphering of GANSS assistance data broadcast on
system information:
2> store the current key in IE "Current deciphering key" in variable UE_POSITIONING_GANSS_DATA;
2> store the next key in IE "Next deciphering key" in variable UE_POSITIONING_GANSS_DATA;
2> store the ciphering key flag in UE_POSITIONING_GANSS_DATA.
1> if deciphering information is received from higher layers for deciphering of OTDOA assistance data broadcast
on system information:
2> store the current key in IE "Current deciphering key" in variable
UE_POSITIONING_OTDOA_DATA_UE_BASED;
2> store the next key in IE "Next deciphering key" in variable
UE_POSITIONING_OTDOA_DATA_UE_BASED;
2> store the ciphering key flag in UE_POSITIONING_OTDOA_DATA_UE_BASED.
1> if the IE "GPS Data ciphering info" is included in System Information Block type 15:
2> select one of the two deciphering keys received and stored it in UE_POSITIONING_GPS_DATA according
to the following:
3> if the value of the received IE "Ciphering Key Flag" is the same as the value of the IE "Ciphering Key
Flag" stored in the variable UE_POSITIONING_GPS_DATA:
4> select the current deciphering key.
3> if the value of the received IE "Ciphering Key Flag" is different from the value of the IE "Ciphering Key
Flag" stored in the variable UE_POSITIONING_GPS_DATA:
4> select the next deciphering key.
2> store the received IE in the variable UE_POSITIONING_GPS_DATA;
2> use the selected deciphering key to decipher the broadcast UE positioning GPS information contained within
the System Information Block types 15.1, 15.2 and 15.3.
1> if the IE "GANSS Data ciphering info" is included in System Information Block type 15.8:
2> select one of the two deciphering keys received and stored it in UE_POSITIONING_GANSS_DATA
according to the following:
3> if the value of the received IE "Ciphering Key Flag" is the same as the value of the IE "Ciphering Key
Flag" stored in the variable UE_POSITIONING_GANSS_DATA:
4> select the current deciphering key.
3> if the value of the received IE "Ciphering Key Flag" is different from the value of the IE "Ciphering Key
Flag" stored in the variable UE_POSITIONING_GANSS_DATA:
ETSI