3GPP 24.501 v20.0.0 — the document's own text
9.11.3.86 Extended CAG information list
Taught in 4. Inside TS 24.501, the document at the centre (CT1 — the group that writes what your phone says, overview).
The purpose of the Extended CAG information list information element is to provide "CAG information list" or to delete the "CAG information list" at the UE.
The Extended CAG information list information element is coded as shown in figures 9.11.3.86.1, figure 9.11.3.86.2, figure 9.11.3.86.3, figure 9.11.3.86.4, figure 9.11.3.86.5 and table 9.11.3.86.1.
The Extended CAG information list is a type 6 information element, with a minimum length of 3 octets.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Extended CAG information list IEI | octet 1 | |||||||
| Length of Extended CAG information list contents | octet 2octet 3 | |||||||
| Entry 1 | octet 4*octet a* | |||||||
| Entry 2 | octet a+1*octet b* | |||||||
| … | octet b+1*octet g* | |||||||
| Entry n | octet g+1*octet h* |
Figure 9.11.3.86.1: Extended CAG information list information element
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Length of entry contents | octet q | |||||||
| octet q+1 | ||||||||
| MCC digit 2 | MCC digit 1 | octet q+2 | ||||||
| MNC digit 3 | MCC digit 3 | octet q+3 | ||||||
| MNC digit 2 | MNC digit 1 | octet q+4 | ||||||
| 0Spare | 0Spare | 0Spare | 0Spare | CAILI | LCI | 0Spare | CAGonly | octet q+5 |
| Length of CAG-ID without additional information list | octet (q+6)*octet (q+7)* | |||||||
| CAG-ID 1 | octet r* (see NOTE)octet (r+3)* | |||||||
| CAG-ID 2 | octet (r+4)*octet (r+7)* | |||||||
| … | octet (r+8)*octet (r+4*m-5)* | |||||||
| CAG-ID m | octet (r+4*m-4)*octet (r+4*m-1)* | |||||||
| CAG-ID with additional information list | octet t*(see NOTE)octet u* |
NOTE: The field is placed immediately after the last present preceding field.
Figure 9.11.3.86.2: Entry n
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Length of CAG-ID with additional information list contents | octet t | |||||||
| octet t+1 | ||||||||
| CAG-ID with additional information 1 | octet t+2octet v | |||||||
| CAG-ID with additional information 2 | octet (v+1)*octet (w)* | |||||||
| … | octet (w+1)*octet (x)* | |||||||
| CAG-ID with additional information o | octet (x+1)*octet u* |
Figure 9.11.3.86.3: CAG-ID with additional information list
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Length of CAG-ID with additional information contents | octet x+1 | |||||||
| octet x+2 | ||||||||
| CAG-ID | octet x+3octet x+6 | |||||||
| 0Spare | SVII | SVII | SVII | SVII | SVII | SVII | TVII | octet x+7 |
| Time validity information | octet (x+8)*octet (x+23)* |
NOTE: The field is placed immediately after the last present preceding field.
Figure 9.11.3.86.4: CAG-ID with additional information
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Number of time periods | octet (x+8) | |||||||
| Time period 1 | octet (x+9)octet (x+24) | |||||||
| Time period 2 | octet (x+25)*octet (x+40)* | |||||||
| ... | octet (x+41)*octet (x-8+o*16)* | |||||||
| Time period o | octet (x-7+o*16)octet (x+8+o*16)* = octet u* |
Figure 9.11.3.86.5: Time validity infomation
Table 9.11.3.86.1: Extended CAG information list information element
| Value part of the Extended CAG information list information element (octet 4 to h)The value part of the Extended CAG information list information element consists of one or more entries.Entry n:Length of entry contents (octet q and q+1)MCC, Mobile country code (octet q+2 and bits 1 to 4 octet q+3)The MCC field is coded as in ITU-T Recommendation E.212 [42], annex A. | |
|---|---|
| MNC, Mobile network code (bits 5 to 8 of octet q+3 and octet q+4)The coding of this field is the responsibility of each administration, but BCD coding shall be used. The MNC shall consist of 2 or 3 digits. If a network operator decides to use only two digits in the MNC, bits 5 to 8 of octet q+2 shall be coded as "1111". | |
| The MCC and MNC digits are coded as octets 6 to 8 of the Temporary mobile group identity IE in figure 10.5.154 of 3GPP TS 24.008 [12]. | |
| Indication that the UE is only allowed to access 5GS via CAG cells (CAGonly) (bit 1 of octet q+5) | |
| Bit | |
| 1 | |
| 0 | "Indication that the UE is only allowed to access 5GS via CAG cells" is not set (i.e. the UE is allowed to access 5GS via non-CAG cells) |
| 1 | "Indication that the UE is only allowed to access 5GS via CAG cells" is set (i.e. the UE is not allowed to access 5GS via non-CAG cells) |
| Length of CAG-ID without additional information list indicator (LCI) (bit 3 of octet q+5) | |
| Bit | |
| 3 | |
| 0 | Length of CAG-ID without additional information list field is absent |
| 1 | Length of CAG-ID without additional information list field is present |
| If the UE does not support enhanced CAG information, the LCI bit shall be set to "Length of CAG-ID without additional information list field is absent". | |
| CAG-ID with additional information list indicator (CAILI) (bit 4 of octet q+5) | |
| Bit | |
| 4 | |
| 0 | CAG-ID with additional information list field is absent |
| 1 | CAG-ID with additional information list field is present |
| If the UE does not support enhanced CAG information or the LCI bit is set to "Length of CAG-ID without additional information list field is absent", the CAILI bit shall be set to "CAG-ID with additional information list field is absent". | |
| Length of CAG-ID without additional information list (octet q+6 to octet q+7) | |
| This field indicates length of CAG-ID fields in octet r to octet (r+4*m-1). | |
| CAG-ID m (octet r+4*m-4 to octet r+4*m-1)This field contains the 32 bit CAG-ID which is not associated with additional information. The coding of the CAG-ID is defined as the CAG-Identifier in 3GPP TS 23.003 [4]. See NOTE 4. | |
| If the length of entry contents field indicates a length bigger than indicated in figure 9.11.3.86.1, receiving entity shall ignore any superfluous octets located at the end of the entry contents. | |
| CAG-ID (octet x+3 to octet x+6)This field contains the 32 bit CAG-ID which is associated with additional information. The additional information is indicated in remaining fields of figure 9.11.3.86.4. The coding of the CAG-ID is defined as the CAG-Identifier in 3GPP TS 23.003 [4]. | |
| Time validity information indicator (TVII) (bit 1 of octet x+7) | |
| Bit | |
| 1 | |
| 0 | Time validity information field is absent |
| 1 | Time validity information field is present |
| Spare validity information indicator (SVII) | |
| 0 | Spare validity information is absent |
| 1 | Spare validity information is present |
| The SVII bit indicates presence of a validity information not specified in the present version of the present document. See NOTE 5. | |
| If the SVII bit is set to "Spare validity information is present", the receiving entity shall ignore the CAG-ID with additional information field. | |
| Time period (octet x+25 to octet x+40) | |
| The time period field is coded as the route selection descriptor component value field for "time window type" specified in 3GPP TS 24.526 [19] table 5.2.1. | |
| If the length of CAG-ID with additional information contents field indicates a length bigger than indicated in figure 9.11.3.86.4, receiving entity shall ignore any superfluous octets located at the end of the CAG-ID with additional information contents. | |
| NOTE 1: The length of extended CAG information list contents field shall be 0 if no subscription data for CAG information list exists. | |
| NOTE 2: The length of entry contents field shall be 4 if there is no allowed CAG-ID for the PLMN. | |
| NOTE 3: For a given PLMN ID, there shall be up to one entry field containing the MCC value and the MNC value of the PLMN ID. | |
| NOTE 4: CAG-ID field containing a CAG-ID which is not associated with additional information, can be provided regardless whether the LCI bit is set to "Length of CAG-ID without additional information list field is absent" or "Length of CAG-ID without additional information list field is present". | |
| NOTE 5: In a future version of the present document, semantic of this bit can be changed to indicate presence or absence of an additional validity information. |