8.15 Bearer Quality of Service (Bearer QoS)
29.2743GPP3GPP Evolved Packet System (EPS)Evolved General Packet Radio Service (GPRS) Tunnelling Protocol for Control plane (GTPv2-C)Release 18Stage 3TS
Bearer Quality of Service (Bearer QoS) is transferred via GTP tunnels. The sending entity copies the value part of the Bearer l QoS into the Value field of the Bearer QoS IE.
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Bits |
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Octets |
8 |
7 |
6 |
5 |
4 |
3 |
2 |
1 |
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1 |
Type = 80 (decimal) |
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2-3 |
Length = n |
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4 |
Spare |
Instance |
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5 |
Spare |
PCI |
PL |
Spare |
PVI |
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6 |
Label (QCI) |
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7 to 11 |
Maximum bit rate for uplink |
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12 to 16 |
Maximum bit rate for downlink |
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17 to 21 |
Guaranteed bit rate for uplink |
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22 to 26 |
Guaranteed bit rate for downlink |
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27 to (n+4) |
These octet(s) is/are present only if explicitly specified |
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Figure 8.15-1: Bearer Quality of Service (Bearer QoS)
Octet 5 represents the Allocation/Retention Priority (ARP) parameter. The meaning and value range of the parameters within the ARP are defined in 3GPP TS 29.212 [29]. The bits within the ARP octet are:
– Bit 1 – PVI (Pre-emption Vulnerability): See 3GPP TS 29.212[29], clause 5.3.47 Pre-emption-Vulnerability AVP.
– Bit 2 – spare
– Bits 3 to 6 – PL (Priority Level): See 3GPP TS 29.212[29], clause 5.3.45 Priority-Level AVP. PL encodes each priority level defined for the Priority-Level AVP as the binary value of the priority level.
– Bit 7 – PCI (Pre-emption Capability): See 3GPP TS 29.212[29], clause 5.3.46 Pre-emption-Capability AVP.
– Bit 8 – spare.
Octet 6 contains the "QCI" value, as specified in 3GPP TS 23.203 [48].
The UL/DL MBR and GBR fields are encoded as kilobits per second (1 kbps = 1000 bps) in binary value. The UL/DL MBR and GBR fields may require converting values in bits per second to kilobits per second when the UL/DL MBR and GBR values are received from an interface other than GTPv2 interface. If such conversions result in fractions, then the value of UL/DL MBR and GBR fields shall be rounded upwards. For non-GBR bearers, both the UL/DL MBR and GBR should be set to zero. The range of QCI, Maximum bit rate for uplink, Maximum bit rate for downlink, Guaranteed bit rate for uplink and Guaranteed bit rate for downlink are specified in 3GPP TS 36.413 [10].
NOTE: The encoding in 3GPP TS 24.301 [23] and 3GPP TS 36.413 [10] is different from the encoding within this specification.