3GPP 24.501 v20.0.0 — the document's own text
9.11.4.36 N3QAI
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 N3QAI information element is to indicate a set of QoS parameters to be used by the UE for non-3GPP access network resource management behind the UE.
The N3QAI information element is a type 6 information element with a minimum length of 9 octets. The maximum length for the information element is 65538 octets.
The N3QAI information element is coded as shown in figure 9.11.4.36.1, figure 9.11.4.36.2, figure 9.11.4.36.3, figure 9.11.4.36.4, and table 9.11.4.36.1.
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| N3QAI IEI | octet 1 | |||||||
| Length of N3QAI contents | octet 2octet 3 | |||||||
| N3QAI 1 | octet 4octet u* | |||||||
| N3QAI 2 | octet (u+1)*octet v* | |||||||
| ... | octet (v+1)*octet w* | |||||||
| N3QAI n | octet (w+1)*octet x* |
Figure 9.11.4.36.1: N3QAI information element
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| Number of QFIs | octet 4 | |||||||
| List of QFIs | octet 5octet m | |||||||
| Number of N3QAI parameters | octet (m+1) | |||||||
| N3QAI parameters list | octet (m+2)octet u* |
Figure 9.11.4.36.2: N3QAI
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| N3QAI parameter 1 | octet (m+2)octet n* | |||||||
| N3QAI parameter 2 | octet (n+1)*octet o* | |||||||
| ... | octet (o+1)*octet p* | |||||||
| N3QAI parameter n | octet (p+1)*octet u* |
Figure 9.11.4.36.3: N3QAI parameters list
| 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | |
|---|---|---|---|---|---|---|---|---|
| N3QAI parameter identifier | octet (m+2) | |||||||
| Length of N3QAI parameter contents | octet (m+3) | |||||||
| N3QAI parameter contents | octet (m+4)octet n* |
Figure 9.11.4.36.4: N3QAI parameter
Table 9.11.4.36.1: N3QAI information element
| Number of QFIs (octet 4)The number of QFIs field contains the binary coding for the number of QFIs associated with the same N3QAI parameters. This field is encoded in bits 8 through 1 of octet 4 where bit 8 is he most significant and bit 1 is the least significant bit.List of QFIs (octet 5 to octet m)This field indicates QoS flow(s) associated with the same N3QAI parameters. This field contains QFI values encoded as below:Bits8 7 6 5 4 3 2 10 0 0 0 0 0 0 0 Reserved0 0 0 0 0 0 0 1 QFI 1 to0 0 1 1 1 1 1 1 QFI 63The other values are spare. If spare value is used, the UE shall ignore the value. |
|---|
| Number of N3QAI parameters (bits 8 to 1 of octet (m+1))The number of N3QAI parameters field contains the binary coding for the number of N3QAI parameters in the N3QAI parameters list field. The number of N3QAI parameters field is encoded in bits 8 through 1 of octet (m+1) where bit 8 is the most significant and bit 1 is the least significant bit. |
| N3QAI parameters list (octets (m+2) to q*)The N3QAI parameters list field contains a variable number of N3QAI parameters.Each N3QAI parameter included in the N3QAI parameters list is of variable length and consists of:- a N3QAI parameter identifier (1 octet); - the length of the N3QAI parameter contents (1 octet); and- the N3QAI parameter contents itself (variable number of octets).The N3QAI parameter identifier field is used to identify each parameter included in the N3QAI parameters list and it contains the hexadecimal coding of the parameter identifier. Bit 8 of the parameter identifier field contains the most significant bit and bit 1 contains the least significant bit. In this version of the protocol, the following parameter identifiers are specified:- 01H (5QI);- 02H (GFBR uplink);- 03H (GFBR downlink);- 04H (MFBR uplink);- 05H (MFBR downlink);- 06H (Averaging window);- 07H (Resource type);- 08H (Priority level);- 09H (Packet delay budget);- 0AH (Packet error rate);- 0BH (Maximum data burst volume);- 0CH (Maximum packet loss rate downlink);- 0DH (Maximum packet loss rate uplink);- 0EH (ARP); and- 0FH (Periodicity).If the N3QAI parameters list contains a N3QAI parameter identifier that is not supported by the receiving entity, the corresponding parameter shall be discarded.The length of N3QAI parameter contents field contains the binary coded representation of the length of the parameter contents field. The first bit in transmission order is the most significant bit.For the N3QAI parameter identifiers indicating "5QI", "GFBR uplink", "GFBR downlink", "MFBR uplink", "MFBR downlink", and "Averaging window", the format of the N3QAI parameter contents follows the table 9.11.4.12.1 of clause 9.11.4.12 of this specification.For the N3QAI parameter identifiers indicating "Resource type", "Priority level", "Packet delay budget", "Packet error rate", "Maximum data burst volume", "Maximum packet loss rate downlink", and "Maximum packet loss rate uplink", the format of the N3QAI parameter contents follows the table 9.3.1.1-2 of clause 9.3.1.1 of 3GPP TS 24.502 [18].When the N3QAI parameter identifier indicates "ARP", the N3QAI parameter contents field contains the binary representation of ARP that is one octet in length. The range of the ARP priority level is 1 to 15 with 1 as the highest priority as specified in clause 5.7.2.2 of 3GPP TS.23.501 [8].When the N3QAI parameter identifier indicates "Periodicity", the N3QAI parameter contents field contains the binary representation of the periodicity for the traffic with a unit of microsecond. (NOTE) |
| NOTE: The periodicity refers to the time interval between start of two data bursts for supporting consumer real time applications e.g. XR. |