3GPP 24.501 v20.0.0 — the document's own text
9.11.3.12A Additional information requested
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 Additional information requested information element is to enable the UE to request ciphering keys for deciphering of ciphered broadcast assistance data.
The Additional information requested information element is coded as shown in figure 9.11.3.12A.1 and table 9.11.3.12A.1.
The Additional information requested is a type 4 information element with a length of 3 octets.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Additional information requested IEI | octet 1 | |||||||
| Length of additional information requested contents | octet 2 | |||||||
| 0 | 0 | 0 | 0 | 0 | 0 | 0 | CipherKey | octet 3 |
| Spare |
Figure 9.11.3.12A.1: Additional information requested information element
Table 9.11.3.12A.1: Additional information requested information element
| Ciphering keys for ciphered broadcast assistance data (CipherKey) (octet 3, bit 1) | ||||
|---|---|---|---|---|
| Bit | ||||
| 1 | ||||
| 0 | ciphering keys for ciphered broadcast assistance data not requested | |||
| 1 | ciphering keys for ciphered broadcast assistance data requested | |||
| Bits 8 to 2 of octet 3 are spare and shall be coded as zero. |