ETSI TS 128 552 V15.5.0 (2020-01)

ETSI TS 128 552 V15.5.0 (2020-01)






TECHNICAL SPECIFICATION
5G;
Management and orchestration;
5G performance measurements
(3GPP TS 28.552 version 15.5.0 Release 15)

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3GPP TS 28.552 version 15.5.0 Release 15 1 ETSI TS 128 552 V15.5.0 (2020-01)



Reference
RTS/TSGS-0528552vf50
Keywords
5G
ETSI
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3GPP TS 28.552 version 15.5.0 Release 15 2 ETSI TS 128 552 V15.5.0 (2020-01)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The information
pertaining to these essential IPRs, if any, is publicly available for ETSI members and non-members, and can be found
in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in
respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web
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Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee
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Legal Notice
This Technical Specification (TS) has been produced by ETSI 3rd Generation Partnership Project (3GPP).
The present document may refer to technical specifications or reports using their 3GPP identities. These shall be
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Modal verbs terminology
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provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
ETSI

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3GPP TS 28.552 version 15.5.0 Release 15 3 ETSI TS 128 552 V15.5.0 (2020-01)
Contents
Intellectual Property Rights . 2
Legal Notice . 2
Modal verbs terminology . 2
Foreword . 6
1 Scope . 7
2 References . 7
3 Definitions, abbreviations and measurement family . 8
3.1 Definitions . 8
3.2 Abbreviations . 8
3.4 Measurement family . 8
4 Concepts and overview . 9
5 Performance measurements for 5G Network Functions . 9
5.1 Performance measurements for gNB . 9
5.1.1 Performance measurements valid for all gNB deployment scenarios . 9
5.1.1.1 Packet Delay . 9
5.1.1.1.1 Average delay DL air-interface . 9
5.1.1.2 Radio resource utilization . 9
5.1.1.2.1 DL Total PRB Usage . 9
5.1.1.2.2 UL Total PRB Usage . 10
5.1.1.2.3 Distribution of DL Total PRB Usage . 10
5.1.1.2.4 Distribution of UL Total PRB Usage . 11
5.1.1.3 UE throughput . 11
5.1.1.3.1 Average DL UE throughput in gNB . 11
5.1.1.3.2 Distribution of DL UE throughput in gNB . 12
5.1.1.3.3 Average UL UE throughput in gNB . 14
5.1.1.3.4 Distribution of UL UE throughput in gNB . 15
5.1.1.3.5 Percentage of unrestricted DL UE data volume in gNB . 16
5.1.1.3.6 Percentage of unrestricted UL UE data volume in gNB . 17
5.1.1.4 RRC connection number . 18
5.1.1.4.1 Mean number of RRC Connections . 18
5.1.1.4.2 Max number of RRC Connections . 18
5.1.2 Performance measurements valid only for non-split gNB deployment scenario . 19
5.1.3 Performance measurements valid for split gNB deployment scenario . 19
5.1.3.1 Packet Loss Rate . 19
5.1.3.1.1 UL PDCP SDU Loss Rate . 19
5.1.3.1.2 UL F1-U Packet Loss Rate . 19
5.1.3.1.3 DL F1-U Packet Loss Rate . 20
5.1.3.2 Packet Drop Rate . 20
5.1.3.2.1 DL PDCP SDU Drop rate in gNB-CU-UP . 20
5.1.3.2.2 DL Packet Drop Rate in gNB-DU . 21
5.1.3.3 Packet Delay . 21
5.1.3.3.1 Average delay DL in CU-UP . 21
5.1.3.3.2 Average delay on F1-U . 22
5.1.3.3.3 Average delay DL in gNB-DU . 22
5.1.3.4 IP Latency measurements . 23
5.1.3.4.1 General information . 23
5.1.3.4.2 IP Latency DL in gNB-DU . 23
5.1.3.5 UE Context Release . 23
5.1.3.5.1 UE Context Release Request (gNB-DU initiated) . 23
5.1.3.5.2 Number of UE Context Release Requests (gNB-CU initiated) . 24
5.2 Performance measurements for AMF. 24
5.2.1 Registered subscribers measurement . 24
5.2.1.1 Mean number of registered subscribers. 24
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3GPP TS 28.552 version 15.5.0 Release 15 4 ETSI TS 128 552 V15.5.0 (2020-01)
5.2.1.2 Maximum number of registered subscribers . 24
5.2.2 Registration procedure related measurements . 25
5.2.2.1 Number of initial registration requests . 25
5.2.2.2 Number of successful initial registrations . 25
5.2.2.3 Number of mobility registration update requests . 26
5.2.2.4 Number of successful mobility registration updates . 26
5.2.2.5 Number of periodic registration update requests. 26
5.2.2.6 Number of successful periodic registration updates . 27
5.2.2.7 Number of emergency registration requests . 27
5.2.2.8 Number of successful emergency registrations . 27
5.3 Performance measurements for SMF . 28
5.3.1 Session Management . 28
5.3.1.1 Number of PDU sessions (Mean) . 28
5.3.1.2 Number of PDU sessions (Maximum) . 28
5.3.1.3 Number of PDU session creation requests . 28
5.3.1.4 Number of successful PDU session creations . 29
5.3.1.5 Number of failed PDU session creations . 29
5.4 Performance measurements for UPF . 30
5.4.1 N3 interface related measurements . 30
5.4.1.1 Number of incoming GTP data packets on the N3 interface, from (R)AN to UPF . 30
5.4.1.2 Number of outgoing GTP data packets of on the N3 interface, from UPF to (R)AN . 30
5.4.1.3 Number of octets of incoming GTP data packets on the N3 interface, from (R)AN to UPF . 30
5.4.1.4 Number of octets of outgoing GTP data packets on the N3 interface, from UPF to (R)AN . 31
5.4.2 N6 related measurements . 31
5.4.2.1 N6 incoming link usage . 31
5.4.2.2 N6 outgoing link usage . 31
5.5 Performance measurements for PCF . 32
5.5.1 AM policy association related measurements . 32
5.5.1.1 Number of AM policy association requests . 32
5.5.1.2 Number of successful AM policy associations . 32
5.5.2 SM policy association related measurements . 32
5.5.2.1 Number of SM policy association requests . 32
5.5.2.2 Number of successful SM policy associations . 33
5.6 Performance measurements for UDM . 33
5.6.1 Mean number of registered subscribers through UDM . 33
5.6.2 Maximum number of registered subscribers through UDM . 34
6 Measurements related to end-to-end 5G network and network slicing . 34
6.1 Void . 34
6.2 Virtualised resource usage measurement . 34
Annex A (informative): Use cases for performance measurements . 35
A.1 Monitoring of UL and DL user plane latency in NG-RAN . 35
A.2 Monitoring of UL and DL packet loss in NG-RAN . 35
A.3 Monitoring of DL packet drop in NG-RAN . 35
A.4 Monitoring of UL and DL user plane delay in NG-RAN. 35
A.5 Monitoring of UE Context Release Request (gNB-DU initiated) . 36
A.6 Monitoring of physical radio resource utilization . 36
A.7 Monitoring of RRC connection number . 36
A.8 Monitoring of UE Context Release . 36
A.9 Monitoring of UE Throughput in NG-RAN . 36
A.10 Monitoring of Unrestricted volume in NG-RAN . 37
A.11 N3 data volume related measurements . 37
A.12 N6 related measurements . 37
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3GPP TS 28.552 version 15.5.0 Release 15 5 ETSI TS 128 552 V15.5.0 (2020-01)
A.13 Registration related measurements . 37
A.14 PDU session establishment related measurements . 37
A.15 Policy association related measurements . 38
Annex B (informative): Change history . 39
History . 40

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3GPP TS 28.552 version 15.5.0 Release 15 6 ETSI TS 128 552 V15.5.0 (2020-01)
Foreword
This Technical Specification has been produced by the 3rd Generation Partnership Project (3GPP).
The contents of the present document are subject to continuing work within the TSG and may change following formal
TSG approval. Should the TSG modify the contents of the present document, it will be re-released by the TSG with an
identifying change of release date and an increase in version number as follows:
Version x.y.z
where:
x the first digit:
1 presented to TSG for information;
2 presented to TSG for approval;
3 or greater indicates TSG approved document under change control.
y the second digit is incremented for all changes of substance, i.e. technical enhancements, corrections,
updates, etc.
z the third digit is incremented when editorial only changes have been incorporated in the document.
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3GPP TS 28.552 version 15.5.0 Release 15 7 ETSI TS 128 552 V15.5.0 (2020-01)
1 Scope
This document specifies the performance measurements for 5G networks including network slicing. Performance
measurements for NG-RAN (clause 5.1) as well as for 5GC (clause 5.2 to 5.6) are defined in this document. Related
KPIs are defined to those measurements in TS 28.554 [8].
The performance measurements for NG-RAN applies also to NR option 3 in many cases, but not to the RRC connection
related measurements which are handled by E-UTRAN for NR option 3 (those are measured according to TS 32.425 [9]
and related KPIs in TS 32.451 [10]).
The performance measurements are defined based on the measurement template as described in TS 32.404 [3].
2 References
The following documents contain provisions which, through reference in this text, constitute provisions of the present
document.
- References are either specific (identified by date of publication, edition number, version number, etc.) or
non-specific.
- For a specific reference, subsequent revisions do not apply.
- For a non-specific reference, the latest version applies. In the case of a reference to a 3GPP document (including
a GSM document), a non-specific reference implicitly refers to the latest version of that document in the same
Release as the present document.
[1] 3GPP TR 21.905: "Vocabulary for 3GPP Specifications".
[2] 3GPP TS 32.401: "Telecommunication management; Performance Management (PM); Concept
and requirements".
[3] 3GPP TS 32.404: "Performance Management (PM); Performance measurements - Definitions and
template".
[4] 3GPP TS 23.501: "System Architecture for the 5G System".
[5] IETF RFC 5136: "Defining Network Capacity".
[6] 3GPP TS 38.473: "NG-RAN; F1 Application Protocol (F1AP)".
[7] 3GPP TS 23.502: "Procedures for the 5G System".
[8] 3GPP TS 28.554: “Management and orchestration; 5G end to end Key Performance Indicators
(KPI)”.
[9] 3GPP TS 32.425: “Performance Management (PM); Performance measurements for Evolved
Universal Terrestrial Radio Access Network (E-UTRAN)”
[10] 3GPP TS 32.451: "Key Performance Indicators (KPI) for Evolved Universal Terrestrial Radio
Access Network (E-UTRAN); Requirements”

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3GPP TS 28.552 version 15.5.0 Release 15 8 ETSI TS 128 552 V15.5.0 (2020-01)
3 Definitions, abbreviations and measurement family
3.1 Definitions
For the purposes of the present document, the terms and definitions given in 3GPP TR 21.905 [1] and the following
apply. A term defined in the present document takes precedence over the definition of the same term, if any, in 3GPP
TR 21.905 [1].
IP Latency: the time it takes to transfer a first/initial packet in a data burst from one point to another.
Mapped 5QI: In case when a single 5QI is assigned to the DRB, the mapped 5QI refers to the 5QI that is used for a
DRB within the gNB.
NOTE 1: In this case the mapped 5QI is used for separating certain measurements per QoS class.
NOTE 2: Individual QoS flows into a common 5QI is specified in TS 38.473 [6].
Packet Delay: the time it takes to transfer any packet from one point to another.
Packet Drop Rate: share of packets that were not sent to the target due to congestion or traffic management and should
be seen as a part of the packet loss rate.
Packet Loss Rate: share of packets that could not be received by the target including packets droped, packets lost in
transmission and packets received in wrong format.
3.2 Abbreviations
For the purposes of the present document, the abbreviations given in 3GPP TR 21.905 [1], 3GPP TS 23.501 [4] and the
following apply. An abbreviation defined in the present document takes precedence over the definition of the same
abbreviation, if any, in 3GPP TR 21.905 [1] and 3GPP TS 23.501 [4].
kbit kilobit (1000 bits)
NG-RAN Next Generation Radio Access Network
NSI Network Slice Instance
3.4 Measurement family
The measurement names defined in the present document are all beginning with a prefix containing the measurement
family name. This family name identifies all measurements which relate to a given functionality and it may be used for
measurement administration.
The list of families currently used in the present document is as follows:
- DRB (measurements related to Data Radio Bearer)
- RRC (measurements related to Radio Resource Control)
- UECNTX (measurements related to UE Context)
- RRU (measurements related to Radio Resource Utilization)
- RM (measurements related to Registration Management)
- SM (measurements related to Session Management)
- GTP (measurements related to GTP Management)
- IP (measurements related to IP Management)
- PA (measurements related to Policy Association)
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3GPP TS 28.552 version 15.5.0 Release 15 9 ETSI TS 128 552 V15.5.0 (2020-01)
4 Concepts and overview

5 Performance measurements for 5G Network
Functions
5.1 Performance measurements for gNB
5.1.1 Performance measurements valid for all gNB deployment scenarios
5.1.1.1 Packet Delay
5.1.1.1.1 Average delay DL air-interface
a) This measurement provides the average (arithmetic mean) time it takes to get a reponse back on a HARQ
transmission in the downlink direction. The measurement is optionally split into subcounters per QoS level
(mapped 5QI or QCI in NR option 3).
b) DER (n=1)
c) This measurement is obtained as: sum of (time when the last part of an RLC SDU packet was received by the UE
according to received HARQ feedback information for UM mode or time when the last part of an RLC SDU
packet was received by the UE according to received RLC ACK for AM mode, minus time when corresponding
RLC SDUs arriving at MAC lower SAP) divided by total number of RLC SDUs transmitted to UE successfully.
Separate counters are optionally maintained for each mapped 5QI (or QCI for option 3).
d) Each measurement is an integer representing the mean delay in microseconds. The number of measurements is
equal to one. If the optional QoS level measurement is perfomed, the number of measurements is equal to the
number of mapped 5QIs.
e) The measurement name has the form DRB.AirIfDelayDl or optionally DRB. AirIfDelayDl.QOS, where QOS
identifies the target quality of service class.
f) NRCellDU
g) Valid for packet switched traffic
h) 5GS
i) One usage of this measurement is for performance assurance within integrity area (user plane connection
quality).
5.1.1.2 Radio resource utilization
5.1.1.2.1 DL Total PRB Usage
a) This measurement provides the total usage (in percentage) of physical resource blocks (PRBs) on the downlink
for any purpose.
b) SI
M1(T) 
c) This measurement is obtained as: M (T) = ∗100 , where M (T ) is the DL total PRB usage, which
 
P(T)
 
is percentage of PRBs used, averaged during time period T with value range: 0-100%; M1(T ) is a count of
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3GPP TS 28.552 version 15.5.0 Release 15 10 ETSI TS 128 552 V15.5.0 (2020-01)
full physical resource blocks and all PRBs used for DL traffic transmission shall be included; P(T ) is total
number of PRBs available for DL traffic transmission during time period T ; and T is the time period during
which the measurement is performed.
d) A single integer value from 0 to 100.
e) RRU.PrbTotDl, which indicates the DL PRB Usage for all traffic
f) NRCellDU
g) Valid for packet switched traffic
h) 5GS
i) One usage of this measurement is for monitoring the load of the radio physical layer.
5.1.1.2.2 UL Total PRB Usage
a) This measurement provides the total usage (in perc
...