16.4 Enhancement of performance assurance for 5G networks including network slicing

21.9163GPPRelease 16Release descriptionTS

810031

Enhancement of performance assurance for 5G networks including network slicing

5G_SLICE_ePA

S5

SP-190247

Xiaowei Sun (China Mobile)

Summary based on the input provided by Intel in SP-200849.

The performance assurance feature has been enhanced with respect to both management services and 5G performance data (including performance measurements and KPIs) in Rel-16.

The threshold monitoring service has been defined for performance assurance in Rel-16. It enables the instant threshold monitoring for cumulative counters, and granularity period-based monitoring for the non-cumulative counters, as specified in TS 28.550 [1]. The instant threshold monitoring for cumulative counters supports to send the threshold crossing notification whenever the (interim) measurement value reaches the threshold within the monitoring granularity period. The threshold monitoring service is configurable by adopting the NRM (Network Resource Model) based solution (See ThresholdMonitor IOC in TS 28.622 [2]) in connection with provisioning related operations (including CreateMOI, ModifyMOIAttributes, DeleteMOI, etc) defined in TS 28.532 [3].

The performance data streaming service has been enhanced to support streaming information management, including adding and deleting streaming information by producer, and getting the streaming information by consumer, see TS 28.550 [1] and TS 28.532 [3]. The streaming information management enables the streaming of performance when there are changes on the measurement jobs, including creation of a new measurement, termination of a measurement job and change of the measurements collected in a measurement job.

The new or enhanced 5G performance measurements are defined for NG-RAN and 5GC in Rel-16 in TS 28.552 [4], covering the aspects described in the following table.

NF

Measurements categories

gNB

Packet delay (interface, node, E2E), packet loss, packet drop, IP latency, radio resource utilization, UE IP throughput, RRC connection, PDU Session Management, Handovers, UE measurement report, Transport Blocks (TB), DRB setup management, QoS flow management, UE Context management, PDCP data volume, DC connectivity, channel quality, RACH, beam.

AMF

Registration, service requests

SMF

PDU session management, QoS flow management

UPF

N3, N6, N4 and N9 interfaces, E2E delay

PCF

AM, SM and UE policy association

UDM

Registered subscribers

N3IWF

PDU session management, QoS flow management via untrusted non-3GPP access

NEF

Application triggering, PFD management

NRF

Service registration, service update, service discovery

The performance measurements for ng-eNB have been also defined in TS 32.425 [5] in Rel-16, with the focus on E-UTRA-NR Dual Connectivity.

The 5G KPIs are enhanced or newly defined in TS 28.554 [6] in Rel-16, for the aspects of QoS flow / DRB retainability, DRB accessibility, NG-RAN handover success rate, NG-RAN UE throughput, PDU session establishment success rate, PDU session establishment time, inter-gNB handover Execution time, registration update numbers and success rate, UL/DL delay in NG-RAN nodes and interfaces, integrated UL/DL delay in NG-RAN, and e2e UL/DL delay.

References

List of related CRs: select "TSG Status = Approved" in:
https://portal.3gpp.org/ChangeRequests.aspx?q=1&workitem=810031

[1] TS 28.550: Management and orchestration; Performance assurance

[2] TS 28.622: Telecommunication management; Generic Network Resource Model (NRM) Integration Reference Point (IRP); Information Service (IS)

[3] TS 28.532: Management and orchestration; Generic management services

[4] TS 28.552: Management and orchestration; 5G performance measurements

[5] TS 32.425: Telecommunication management; Performance Management (PM); Performance measurements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN);

[6] TS 28.554: Management and orchestration; 5G end to end Key Performance Indicators (KPI)