5.1.3 Performance measurements valid for split gNB deployment scenario

28.5523GPP5G performance measurementsManagement and orchestrationRelease 18TS

Tools: ARFCN - Frequency Conversion for 5G NR/LTE/UMTS/GSM

5.1.3.1 Packet Loss Rate

5.1.3.1.1 UL PDCP SDU Loss Rate

a) This measurement provides the fraction of PDCP SDU packets which are not successfully received at gNB-CU-UP. It is a measure of the UL packet loss including any packet losses in the air interface, in the gNB-CU and on the F1-U interface. Only user-plane traffic (DTCH) and only PDCP SDUs that have entered PDCP (and given a PDCP sequence number) are considered. The measurement is optionally split into subcounters per QoS level (mapped 5QI or QCI in NR option 3), and subcounters per supported S-NSSAI.

b) SI.

c) This measurement is obtained as: 1000000* Number of missing UL PDCP sequence numbers, representing packets that are not delivered to higher layers, of a data radio bearer, divided by Total number of UL PDCP sequence numbers (also including missing sequence numbers) of a bearer, starting from the sequence number of the first packet delivered by UE PDCP to gNB-CU-UP until the sequence number of the last packet. If transmission of a packet might continue in another cell, it shall not be included in this count. Separate counters are optionally maintained for mapped 5QI (or QCI for NR option 3) and per supported S-NSSAI.

d) Each measurement is an integer value representing the loss rate multiplied by 1E6. The number of measurements is equal to one. If the optional QoS and S-NSSAI level measurements are perfomed, the measurements are equal to the number of mapped 5QIs and the number of supported S-NSSAIs.

e) The measurement name has the form DRB.PacketLossRateUl and optionally DRB.PacketLossRateUl.QOS where QOS identifies the target quality of service class, and DRB.PacketLossRateUl.SNSSAI where SNSSAI identifies the S-NSSAI.

f) GNBCUUPFunction.

NRCellCU.

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). NRCellCU measurement applies only for 2-split deployment.

5.1.3.1.2 UL F1-U Packet Loss Rate

a) This measurement provides the fraction of PDCP SDU packets which are not successfully received at gNB-CU-UP. It is a measure of the UL packet loss on the F1-U interface. The measurement is optionally split into subcounters per QoS level (mapped 5QI or QCI in NR option 3) and subcounters per supported S-NSSAI.

b) SI

c) This measurement is obtained as: 1000000* Number of missing UL GTP sequence numbers (TS 29.281), representing packets that are not delivered to higher layers, of a data radio bearer, divided by Total number of UL GTP sequence numbers (also including missing sequence numbers) of a bearer, starting from the GTP sequence number of the first packet delivered by gNB-DU to gNB-CU-UP until the GTP sequence number of the last packet. Separate counters are optionally maintained for mapped 5QI (or QCI for option 3) and per supported S-NSSAI.

d) Each measurement is an integer value representing the loss rate multiplied by 1E6. The number of measurements is equal to one. If the optional QoS and S-NSSAI level measurement are perfomed, the measurements are equal to the number of mapped 5QIs and the number of supported S-NSSAIs.

e) The measurement name has the form DRB.F1UpacketLossRateUl and optionally DRB.F1UPacketLossRateUl.QOS where QOS identifies the target quality of service class, and DRB.F1UPacketLossRateUl.SNSSAI where SNSSAI identifies the S-NSSAI.

f) GNBCUUPFunction

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).

5.1.3.1.3 DL F1-U Packet Loss Rate

a) This measurement provides the fraction of PDCP SDU packets which are not successfully received at the gNB-DU). It is a measure of the DL packet loss on the F1-U interface. The measurement is optionally split into subcounters per QoS level (mapped 5QI or QCI in NR option 3), and subcounters per supported S-NSSAI.

b) SI

c) This measurement is obtained as: 1000000* Number of missing DL GTP sequence numbers (TS 29.281), representing packets that are not delivered to lower layers, of a data radio bearer, divided by Total number of UL GTP sequence numbers (also including missing sequence numbers) of a bearer, starting from the sequence number of the first packet delivered by gNB-CU-UP to gNB-DU until the GTP sequence number of the last packet. Separate counters are optionally maintained for mapped 5QI (or QCI for NR option 3) and per supported S-NSSAI.

d) Each measurement is an integer value representing the loss rate multiplied by 1E6. The number of measurements is equal to one. If the optional QoS and S-NSSAI level measurement are perfomed, the measurements are equal to the number of mapped 5QIs and the number of supported S-NSSAIs.

e) The measurement name has the form DRB.F1UpacketLossRateDl .and optionally DRB.F1UPacketLossRateDl.QOS where QOS identifies the target quality of service class, and DRB.F1UPacketLossRateDl.SNSSAI where SNSSAI identifies the S-NSSAI.

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).

5.1.3.2 Packet Drop Rate

5.1.3.2.1 DL PDCP SDU Drop rate in gNB-CU-UP

a) This measurement provides the fraction of PDCP SDU packets which are dropped on the downlink, due to high traffic load, traffic management etc in the gNB-CU-UP. Only user-plane traffic (DTCH) is considered. A dropped packet is one whose context is removed from the gNB-CU-UP without any part of it having been transmitted on the F1-U or Xn-U or X2-U interface. The measurement is optionally split into subcounters per QoS level (mapped 5QI or QCI in NR option 3), and subcounters per supported S-NSSAI.

NOTE: this measurement may include packets that were supposed to be sent via the eUtran air interface if using NR split bearer option 3, 4 or 7.

b) SI.

c) This measurement is obtained as: 1000000*Number of DL packets, for which no part has been transmitted over the F1-U or Xn-U or X2-U interface, of a data radio bearer, that are discarded in the PDCP layer, divided by Number of DL packets for data radio bearers that has entered PDCP upper SAP. Separate counters are optionally maintained for mapped 5QI (or QCI for NR option 3) and per supported S-NSSAI.

d) Each measurement is an integer value representing the drop rate multiplied by 1E6. The number of measurements is equal to one. If the optional QoS and S-NSSAI level measurement are perfomed, the measurements are equal to the number of mapped 5QIs and the number of supported S-NSSAIs.

e) The measurement name has the form DRB.PdcpPacketDropRateDl and optionally DRB.PdcpPacketDropRateDl.QOS
where QOS identifies the target quality of service class, and DRB.PdcpPacketDropRateDl.SNSSAI where SNSSAI identifies the S-NSSAI.

f) GNBCUUPFunction.

NRCellCU.

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). NRCellCU measurement applies only for 2-split deployment.

5.1.3.2.2 DL Packet Drop Rate in gNB-DU

a) This measurement provides the fraction of RLC SDU packets which are dropped on the downlink, due to high traffic load, traffic management etc in the gNB-DU. Only user-plane traffic (DTCH) is considered. A dropped packet is one whose context is removed from the gNB-DU without any part of it having been transmitted on the air interface. The measurement is optionally split into subcounters per QoS level (mapped 5QI or QCI in NR option 3), and subcounters per supported S-NSSAI.

b) SI.

c) This measurement is obtained as: 1000000*Number of DL packets, for which no part has been transmitted over the air, of a data radio bearer, that are discarded in the gNB-DU divided by Number of DL packets for data radio bearers that were received from gNB-CU-UP. Separate counters are optionally maintained for mapped 5QI (or QCI for NR option 3) and per supported S-NSSAI.

e) The measurement name has the form DRB.RlcPacketDropRateDl and optionally DRB.RlcPacketDropRateDl.QOS
where QOS identifies the target quality of service class, and DRB.RlcPacketDropRateDl.SNSSAI where SNSSAI identifies the S-NSSAI.

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).

5.1.3.3 Packet delay

5.1.3.3.1 Average delay DL in CU-UP

a) This measurement provides the average (arithmetic mean) PDCP SDU delay on the downlink within the gNB-CU-UP, for all PDCP packets. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained as: sum of (time when sending a PDCP SDU to the gNB-DU at the egress PDCP layer on F1-U/Xn-U, minus time of arrival of the same packet at NG-U ingress IP termination) divided by total number of PDCP SDUs arriving at NG-U ingress IP termination. The measurement is performed per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI.

d) Each measurement is a real representing the mean delay in 0.1 millisecond. The number of measurements is equal to the number of PLMNs multiplied by the number of QoS levels or multiplied by the number of S-NSSAIs.
[Total No. of measurement instances] x [No. of filter values for all measurements] (DL and UL) ≤ 100.

e) The measurement name has the form DRB.PdcpSduDelayDl_Filter,
Where filter is a combination of PLMN ID and QoS level and S-NSSAI.
Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or QCI level, and SNSSAI represents S-NSSAI.

f) GNBCUUPFunction

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).

5.1.3.3.2 Average delay DL on F1-U

a) This measurement provides the average (arithmetic mean) GTP packet delay DL on the F1-U interface. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained as: the time when receiving a GTP packet from the gNB-DU at the egress GTP termination, minus time when sending the same packet to gNB-DU at the GTP ingress termination, minus feedback delay time in gNB-DU, obtained result is divided by two.. The measurement is performed per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI.

e) The measurement name has the form DRB.PdcpF1DelayDl_Filter,
Where filter is a combination of PLMN ID and QoS level and S-NSSAI.
Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or QCI level, and SNSSAI represents S-NSSAI.

f) GNBCUUPFunction

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).

NOTE : The NR RAN container (DL USER DATA/ DL DATA DELIVERY STATUS) carried in the GTP-U packet over the F1-U interface is used for the measurement.

5.1.3.3.3 Average delay DL in gNB-DU

a) This measurement provides the average (arithmetic mean) RLC SDU delay on the downlink within the gNB-DU, for initial transmission of all RLC packets. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained as: sum of (time when the last part of an RLC SDU was scheduled and sent to the MAC layer for transmission over the air, minus time of arrival of the same packet at the RLC ingress F1-U termination) divided by total number of RLC SDUs arriving at the RLC ingress F1-U termination. If the RLC SDU needs retransmission (for Acknowledged Mode) the delay will still include only one contribution (the original one) to this measurement. The measurement is performed per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI.

e) The measurement name has the form DRB.RlcSduDelayDl,
Where filter is a combination of PLMN ID and QoS level and S-NSSAI.
Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or QCI level, and SNSSAI represents S-NSSAI.

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).

5.1.3.3.4 Distribution of delay DL in CU-UP

a) This measurement provides the distribution of PDCP SDU delay on the downlink within the gNB-CU-UP, for all PDCP packets. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained by 1) calculating the DL delay within the gNB-CU-UP for a PDCP SDU packet by: the time when sending a PDCP SDU to the gNB-DU at the egress PDCP layer on F1-U/Xn-U, minus time of arrival of the same packet at NG-U ingress IP termination; and 2) incrementing the corresponding bin with the delay range where the result of 1) falls into by 1 for the counters. The measurement is performed per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI.

d) Each measurement is an integer representing the number of PDCP SDU packets measured with the delay within the range of the bin. The number of measurements is equal to the number of PLMNs multiplied by the number of QoS levels or multiplied by the number of S-NSSAIs.
[Total No. of measurement instances] x [No. of filter values for all measurements] (DL and UL) ≤ 100.

e) DRB.PdcpSduDelayDlDist.Bin_Filter, where Bin indicates a delay range which is vendor specific;
Where filter is a combination of PLMN ID and QoS level and S-NSSAI.
Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or QCI level, and SNSSAI represents S-NSSAI.

f) GNBCUUPFunction

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).

5.1.3.3.5 Distribution of delay DL on F1-U

a) This measurement provides the distribution of GTP packet delay DL on the F1-U interface. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained by 1) calculating the DL delay on F1-U for a GTP packet by: the time when receiving a GTP packet delivery status message from the gNB-DU at the egress GTP termination, minus time when sending the same packet to gNB-DU at the GTP ingress termination, minus feedback delay time in gNB-DU, obtained result is divided by two; and 2) incrementing the corresponding bin with the delay range where the result of 1) falls into by 1 for the counters. The measurement is performed per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI.

d) Each measurement is an integer representing the number of GTP packets measured with the delay within the range of the bin. The number of measurements is equal to the number of PLMNs multiplied by the number of QoS levels or multiplied by the number of S-NSSAIs.
[Total No. of measurement instances] x [No. of filter values for all measurements] (DL and UL) ≤ 100.

e) DRB.GtpF1DelayDlDist.Bin_Filter, where Bin indicates a delay range which is vendor specific;
Where filter is a combination of PLMN ID and QoS level and S-NSSAI.
Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or QCI level, and SNSSAI represents S-NSSAI.

f) GNBCUUPFunction

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).

5.1.3.3.6 Distribution of delay DL in gNB-DU

a) This measurement provides the distribution of RLC SDU delay on the downlink within the gNB-DU, for initial transmission of all RLC packets. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained by 1) calculating the delay on the downlink within the gNB-DU for a RLC SDU packet by: the time when the last part of an RLC SDU was scheduled and sent to the MAC layer for transmission over the air, minus time of arrival of the same packet at the RLC ingress F1-U termination; and 2) incrementing the corresponding bin with the delay range where the result of 1) falls into by 1 for the counters. The measurement is performed per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI. If the RLC SDU needs retransmission (for Acknowledged Mode) the delay will still include only one contribution (the original one) to this measurement.

d) Each measurement is an integer representing the number of RLC SDU packets measured with the delay within the range of the bin. The number of measurements is equal to the number of PLMNs multiplied by the number of QoS levels or multiplied by the number of S-NSSAIs.
[Total No. of measurement instances] x [No. of filter values for all measurements] (DL and UL) ≤ 100.

e) DRB.RlcSduDelayDlDist.Bin_Filter, where Bin indicates a delay range which is vendor specific;
Where filter is a combination of PLMN ID and QoS level and S-NSSAI.
Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or QCI level, and SNSSAI represents S-NSSAI.

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).

5.1.3.4 IP Latency measurements

5.1.3.4.1 General information

This clause defines the DL latency in gNB-DU. DL latency measurements for CU-UP and F1-U are not defined.

5.1.3.4.2 Average IP Latency DL in gNB-DU

a) This measurement provides the average IP Latency in DL (arithmetic mean) within the gNB-DU, when there is no other prior data to be transmitted to the same UE in the gNB-DU. The measurement is optionally split into subcounters per QoS level and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained as: sum of (time when the first piece of an RLC SDU transmitted on the air interface, minus time of arrival of the same packet at the RLC ingress F1-U termination, for IP packets arriving when there is no other prior data to be transmitted to the same UE in the gNB-DU) divided by total number of RLC SDUs arriving at the RLC ingress F1-U termination when there is no other prior data to be transmitted to the same UE in the gNB-DU. Separate counters are optionally maintained for each mapped 5QI (or QCI for option 3) and for each S-NSSAI.

d) Each measurement is a real representing the average latency in 0.1 millisecond. The number of measurements is equal to one. If the optional QoS level subcounters and S-NSSAI subcounters are measurement is performed, the number of measurements is equal to the sum of number of supported mapped 5QIs and the number of S-NSSAIs.

e) The measurement name has the form DRB.RlcSduLatencyDl,
optionally DRB.RlcSduLatencyDl.QOS where QOS identifies the target quality of service class, and
optionally DRB.RlcSduLatencyDl.SNSSAI, where SNSSAI identifies the S-NSSAI.

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).

5.1.3.4.3 Distribution of IP Latency DL in gNB-DU

a) This measurement provides the distribution of IP Latency in DL within the gNB-DU, when there is no other prior data to be transmitted to the same UE in the gNB-DU. The measurement is split into subcounters per QoS level and subcounters per S-NSSAI.

b) DER (n=1)

c) This measurement is obtained by 1) calculating the latency on the downlink within the gNB-DU for a RLC SDU packet by: time when the first piece of an RLC SDU transmitted on the air interface, minus time of arrival of the same packet at the RLC ingress F1-U termination, for IP packets arriving when there is no other prior data to be transmitted to the same UE in the gNB-DU; and 2) incrementing the corresponding bin with the latency range where the result of 1) falls into by 1 for the subcounters per QoS level (mapped 5QI or QCI in NR option 3) and subcunters per S-NSSAI.

d) Each measurement is an integer representing the number of RLC SDU packets measured with the latency within the range of the bin.

e) DRB.RlcSduLatencyDlDist.bin.QOS, where QOS identifies the target quality of service class, and Bin indicates a latency range which is vendor specific;
DRB.RlcSduLatencyDlDist.bin.SNSSAI, where SNSSAI identifies the S-NSSAI, and Bin indicates a latency range which is vendor specifics.

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).

5.1.3.5 UE Context Release

5.1.3.5.1 UE Context Release Request (gNB-DU initiated)

a) This measurement provides the number of UE CONTEXT Release initiated by gNB-DU for each release cause.

b) SI

c) Transmission of an UE CONTEXT RELEASE REQUEST message initiated by gNB-DU. Each release request is to be added to the relevant cause measurement. This measurement is also counted to the SSB beam which the UE connects to when the UE CONTEXT RELEASE REQUEST message is transmitted. The possible causes are defined in 38.473 [6]. The sum of all supported per causes measurements shall equal the total number of UE CONTEXT Release initiated by gNB-DU. In case only a subset of per cause measurements is supported, a sum subcounter will be provided first.

d) Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.

e) The measurement name has the form UECNTX.RelReq.Cause
where Cause identifies the release cause.

f) NRCellDU
Beamg) Valid for packet switched traffic

h) 5GS

i) One usage of this performance measurements is to support MDA.

5.1.3.5.2 Number of UE Context Release Requests (gNB-CU initiated)

a) This measurement provides the number of UE CONTEXT RELEASE initiated by gNB-CU for each release cause.

b) SI

c) Transmission of an UE CONTEXT RELEASE COMMAND message initiated by gNB-CU. Each release request is to be added to the relevant cause measurement. This measurement is also counted to the SSB beam which the UE connected to when the UE CONTEXT RELEASE COMMAND message is transmitted. The possible causes are defined in 38.473 [6]. The sum of all supported per causes measurements shall equal the total number of UE CONTEXT Release initiated by gNB-CU. In case only a subset of per cause measurements is supported, a sum subcounter will be provided first.

d) Each measurement is an integer value. The number of measurements is equal to the number of causes plus a possible sum value identified by the .sum suffix.

e) The measurement name has the form UECNTX.RelCmd.Cause where Cause identifies the release cause.

f) NRCellCU
Beam

g) Valid for packet switched traffic

h) 5GS

i) One usage of this performance measurements is to support MDA.

5.1.3.6 PDCP data volume measurements

5.1.3.6.1 PDCP PDU data volume Measurement

5.1.3.6.1.1 DL PDCP PDU Data Volume

This measurement provides the Data Volume (amount of PDCP PDU bits) in the downlink delivered from GNB-CU to GNB-DU. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI.

b) CC.

c) This measurement is obtained by counting the number of DL PDCP PDU bits sent to GNB-DU. The measurement is performed per configured PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI.

The measurements of DL Cell PDCP PDU Data Volume in Dual-Connectivity scenarios is not included.

d) Each measurement is an integer value representing the number of bits measured in Mbits (1MBits=1000*1000 bits). The number of measurements is equal to the number of PLMNs multiplied by the number of QoS levels or multiplied by the number of supported S-NSSAIs.
[Total no. of measurement instances] x [no. of filter values for all measurements] (DL and UL) ≤ 100.

e) The measurement name has the form QosFlow.PdcpPduVolumeDL_Filter.

f) GNBCUUPFunction.

NRCellCU.

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). NRCellCU measurement applies only for 2-split deployment.

5.1.3.6.1.2 UL PDCP PDU Data Volume

a) This measurement provides the Data Volume (amount of PDCP PDU bits) in the uplink delievered from GNB-DU to GNB-CU. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI. The unit is Mbit (1MBits=1000*1000 bits).

b) CC

c) This measurement is obtained by counting the number of bits entering the GNB-CU. The measurement is performed at the PDCP PDU level. The measurement is performed per configured PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI.

The measurements of UL Cell PDCP PDU Data Volume in Dual-Connectivity scenarios is not included.

d) Each measurement is an integer value representing the number of bits measured in Mbits. The number of measurements is equal to the number of PLMNs multiplied by the number of QoS levels or multiplied by the number of supported S-NSSAIs.
[Total no. of measurement instances] x [no. of filter values for all measurements] (DL and UL) ≤ 100.

e) The measurement name has the form QosFlow.PdcpPduVolumeUl_Filter.

f) GNBCUUPFunction.

NRCellCU.

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). NRCellCU measurement applies only for 2-split deployment.

5.1.3.6.2 PDCP SDU data volume Measurement

5.1.3.6.2.1 DL PDCP SDU Data Volume

This measurement provides the Data Volume (amount of PDCP SDU bits) in the downlink delivered to PDCP layer. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI.

The unit is Mbit.

b) CC

c) This measurement is obtained by counting the number of bits entering the NG-RAN PDCP layer. The measurement is performed at the PDCP SDU level. The measurement is performed per configured PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI.

e) The measurement name has the form QosFlow.PdcpSduVolumeDl_Filter.

f) GNBCUUPFunction.

NRCellCU.

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). NRCellCU measurement applies only for 2-split deployment.

5.1.3.6.2.2 UL PDCP SDU Data Volume

a) This measurement provides the Data Volume (amount of PDCP SDU bits) in the uplink delivered from PDCP layer to SDAP layer or UPF. The measurement is calculated per PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI.
The unit is Mbit.

b) CC.

c) This measurement is obtained by counting the number of bits leaving the NG-RAN PDCP layer. The measurement is performed at the PDCP SDU level. The measurement is performed per configured PLMN ID and per QoS level (mapped 5QI or QCI in NR option 3) and per supported S-NSSAI.

e) The measurement name has the form QosFlow.PdcpSduVolumeUL_Filter.

f) GNBCUUPFunction.

NRCellCU.

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). NRCellCU measurement applies only for 2-split deployment.

5.1.3.6.2.3 DL PDCP SDU Data Volume per interface

a) This measurement provides the Data Volume (amount of PDCP SDU bits) in the downlink delivered from GNB-CU-UP to GNB-DU (F1-U interface), to external gNB-CU-UP (Xn-U interface) and to external eNB (X2-U interface). The measurement is calculated per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI and per PLMN ID, and reported per Interface (F1-U, Xn-U, X2-U).

b) CC

c) This measurement is obtained by counting the number of DL PDCP SDU bits sent to GNB-DU (F1-U interface), sent to external gNB-CU-UP (Xn-U interface) and sent to external eNB (X2-U interface). The measurement is performed in GNB-CU-UP per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI and per PLMN ID, and reported per interface (F1-U, Xn-U, X2-U).

d) Each measurement is an integer value representing the number of bits measured in Mbits (1MBits=1000*1000 bits). The number of measurements is equal to the number of QoS levels per interface plus the number of S-NSSAIs per interface plus the number of PLMN ID.

e) The measurement names have the form DRB.F1uPdcpSduVolumeDL_Filter.

Where filter is a combination of PLMN ID and QoS level and S-NSSAI. (F1-U interface measurements) (Xn-U interface measurements)

Where filter is a combination of PLMN ID and QoS level. (X2-U interface measurements)

Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or the QCI level, and SNSSAI represents S-NSSAI.:

f) EP_F1U (F1-U interface), EP_XnU (Xn-U interface), EP_X2U (X2-U interface).

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) and in the energy efficency (EE) area.

5.1.3.6.2.4 UL PDCP SDU Data Volume per interface

a) This measurement provides the Data Volume (amount of PDCP SDU bits) in the uplink delivered to GNB-CU-UP from GNB-DU (F1-U interface), from external gNB-CU-UP (Xn-U interface) and from external eNB (X2-U interface). The measurement is calculated per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI and per PLMN ID, and reported per Interface (F1-U, Xn-U, X2-U).

b) CC.

c) This measurement is obtained by counting the number of UL PDCP SDU bits entering the GNB-CU-UP from GNB-DU (F1-U interface), from external gNB-CU-UP (Xn-U interface) and from external eNB (X2-U interface). The measurement is performed in GNB-CU-UP per QoS level (mapped 5QI or QCI in NR option 3) and per S-NSSAI and per PLMN ID, and reported per Interface (F1-U, Xn-U, X2-U).

e) The measurement names have the form DRB.F1uPdcpSduVolumeUL_Filter.

Where filter is a combination of PLMN ID and QoS level and S-NSSAI. (F1-U interface measurements) (Xn-U interface measurements)

Where filter is a combination of PLMN ID and QoS level. (X2-U interface measurements)

Where PLMN ID represents the PLMN ID, QoS representes the mapped 5QI or the QCI level, and SNSSAI represents S-NSSAI.:

f) EP_F1U (F1-U interface), EP_XnU (Xn-U interface), EP_X2U (X2-U interface).

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) and in the energy efficency (EE) area.

5.1.3.7 Handovers measurements

5.1.3.7.1 Intra-gNB handovers

5.1.3.7.1.1 Number of requested legacy handover preparations

a) This measurement provides the number of outgoing intra-gNB legacy handover preparations requested by the source NRCellCU for split gNB deployment.

b) CC.

c) For split gNB deployment the measurement is triggered and stepped by 1 when gNB-CUCP is sending UE CONTEXT MODIFICATION REQUEST message (see TS 38.473 [6]) to gNB-DU to initiate an intra-gNB legacy handover.

d) A single integer value.

e) MM.HoPrepIntraReq.

f) NRCellCU.

g) Valid for packet switched traffic.

h) 5GS.

i) One usage of this performance measurement is for performance assurance.

5.1.3.7.1.2 Number of successful legacy handover preparations

a) This measurement provides the number of successful intra-gNB legacy handover preparations received by the source NRCellCU, for split gNB deployment.

b) CC

c) For split gNB deployment the measurement is triggered and stepped by 1 when gNB-CUCP receives UE CONTEXT MODIFICATION RESPONSE message (see TS 38.473 [6]) from gNB-DU to initiate a successful intra-gNB legacy handover.

d) A single integer value.

e) MM.HoPrepIntraSucc.

f) NRCellCU.

g) Valid for packet switched traffic.

h) 5GS.

i) One usage of this performance measurement is for performance assurance.

5.1.3.7.1.3 Number of requested conditional handover preparations

a) This measurement provides the number of outgoing intra-gNB conditional handover preparations requested by the source NRCellCU for a split gNB deployment.

b) CC.

d) A single integer value.

e) MM.ChoPrepIntraReq

f) NRCellCU

g) Valid for packet switched traffic.

h) 5GS

i) One usage of this performance measurement is for performance assurance.

5.1.3.7.1.4 Number of successful conditional handover preparations

a) This measurement provides the number of successful intra-gNB conditional handover preparations received by the source NRCellCU, for a split gNB deployment.

b) CC

d) A single integer value.

e) MM.ChoPrepIntraSucc

f) NRCellCU

g) Valid for packet switched traffic.

h) 5GS

i) One usage of this performance measurement is for performance assurance.

5.1.3.7.1.5 Number of requested DAPS handover preparations

a) This measurement provides the number of outgoing intra-gNB DAPS handover preparations requested by the source NRCellCU for a split gNB deployment.

b) CC.

d) A single integer value.

e) MM.DapsHoPrepIntraReq

f) NRCellCU

g) Valid for packet switched traffic.

h) 5GS

i) One usage of this performance measurement is for performance assurance.

5.1.3.7.1.6 Number of successful DAPS handover preparations

a) This measurement provides the number of successful intra-gNB DAPS handover preparations received by the source NRCellCU, for a split gNB deployment.

b) CC

d) A single integer value.

e) MM.DapsHoPrepIntraSucc

f) NRCellCU

g) Valid for packet switched traffic.

h) 5GS

i) One usage of this performance measurement is for performance assurance.

5.1.3.7.1.7 Number of UEs for which conditional handover preparations are requested

a) This measurement provides the number of UEs for which outgoing intra-gNB conditional handover preparations are requested by the source NRCellCU for a split gNB deployment.

b) CC.

c) For split gNB deployment the measurement is triggered and stepped by 1 when gNB-CUCP is sending a UE CONTEXT MODIFICATION REQUEST message (see TS 38.473 [6] clause 8.3.4) to gNB-DU to request resources for an intra-gNB conditional handover. The counter is incremented by 1 for each UE, even if UE CONTEXT MODIFICATION REQUEST messages were sent for several cells.

d) A single integer value.

e) MM.ChoPrepIntraReqUes

f) NRCellCU

g) Valid for packet switched traffic.

h) 5GS

i) One usage of this performance measurement is for performance assurance.

5.1.3.7.1.8 Number of UEs for which conditional handover preparations are successful

a) This measurement provides the number of UEs for which intra-gNB conditional handover preparations received by the source NRCellCU are successful, for a split gNB deployment.

b) CC

c) For split gNB deployment the measurement is triggered and stepped by 1 when gNB-CUCP receives a UE CONTEXT MODIFICATION RESPONSE message (see TS 38.473 [6] clause 8.3.4) from gNB-DU to initiate a successful intra-gNB conditional handover. The counter is incremented by 1 for each UE, even if UE CONTEXT MODIFICATION RESPONSE messages were received for several cells.

d) A single integer value.

e) MM.ChoPrepIntraSuccUes

f) NRCellCU

g) Valid for packet switched traffic.

h) 5GS

i) One usage of this performance measurement is for performance assurance.