3GPP 24.501 v20.0.0 — the document's own text
9.11.3.2A 5GS DRX parameters
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 5GS DRX parameters information element is to indicate that the UE wants to use DRX and for the network to indicate the DRX cycle value to be used at paging.
The 5GS DRX parameters is a type 4 information element with a length of 3 octets.
The 5GS DRX parameters information element is coded as shown in figure 9.11.3.2A.1 and table 9.11.3.2A.1.
The value part of a DRX parameter information element is coded as shown in table 9.11.3.2A.1.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| 5GS DRX parameters IEI | octet 1 | |||||||
| Length of 5GS DRX parameters contents | octet 2 | |||||||
| 0 | 0 | 0 | 0 | DRX value | ||||
| spare | octet 3 |
Figure 9.11.3.2A.1: 5GS DRX parameters information element
Table 9.11.3.2A.1: 5GS DRX parameters information element
| DRX value (bits 4 to 1 of octet 3)This field represents the DRX cycle parameter 'T' as defined in 3GPP TS 38.304 [28] or 3GPP TS 36.304 [25C]. | ||||
|---|---|---|---|---|
| Bits | ||||
| 4 | 3 | 2 | 1 | |
| 0 | 0 | 0 | 0 | DRX value not specified |
| 0 | 0 | 0 | 1 | DRX cycle parameter T = 32 |
| 0 | 0 | 1 | 0 | DRX cycle parameter T = 64 |
| 0 | 0 | 1 | 1 | DRX cycle parameter T = 128 |
| 0 | 1 | 0 | 0 | DRX cycle parameter T = 256 |
| All other values shall be interpreted as "DRX value not specified" by this version of the protocol.Bits 5 to 8 of octet 3 are spare and shall be coded as zero. | ||||