4.2.6 EFHPPLMN (Higher Priority PLMN search period)

31.1023GPPCharacteristics of the Universal Subscriber Identity Module (USIM) applicationRelease 17TS

This EF contains the interval of time between searches for a higher priority PLMN (see 3GPP TS 23.122 [31]).

Identifier: ‘6F31’

Structure: transparent

Mandatory

SFI: ’12’

File size: 1 byte

Update activity: low

Access Conditions:

READ PIN

UPDATE ADM

DEACTIVATE ADM

ACTIVATE ADM

Bytes

Description

M/O

Length

1

Time interval

M

1 byte

‑ Time interval.

Contents:

the time interval between two searches.

Coding:

For UEs not using any of the following at the time of starting the timer: NB-IoT, GERAN EC-GSM-IoT and Category M1 of E-UTRAN enhanced-MTC as specified in 3GPP TS 36.306 [85], the time interval is coded in integer multiples of n minutes. The range is from n minutes to a maximum value. The encoding is:

‑ ’00’: No higher priority PLMN search attempts;

‑ ’01’: n minutes;

‑ ’02’: 2n minutes;

‑ : :

‑ ‘YZ’: (16Y+Z)n minutes (maximum value).

For UEs using any of the following at the time of starting the timer: NB-IoT, GERAN EC-GSM-IoT and Category M1 of E-UTRAN enhanced-MTC as specified in 3GPP TS 36.306 [85], the time interval is coded as follows. The range is from n hours to a maximum value. The encoding is:

‑ ’00’: No higher priority PLMN search attempts;

‑ ’01’: n hours (2 hours);

‑ ’02’ to ’28’: 2n hours (i.e. range from 4 hours to 80 hours with step of 2 hours);

‑ ’29’ to ’50’: 4n-80 hours (i.e. range from 84 hours to 240 hours with step of 4 hours).

– All other values shall be interpreted by the ME as a default period.

For specification of the integer timer interval n, the maximum value and the default period refer to 3GPP TS 23.122 [31].

NOTE 1: Care should be taken in the configuration of this EF, as the value stored can be interpreted in different ways depending on the type of device and radio technology used by the device.

NOTE 2: If EFMCHPPLMN is configured as per clause 4.4.11.20, the time interval between two searches for a higher priority PLMN (see 3GPP TS 23.122 [31]) is calculated by multiplying the time interval configured in EFHPPLMN and the multiplier coefficient configured in EFMCHPPLMN.