09_RN31589EN20GLA0_RCPM

1 © Nokia Siemens Networks RN31589EN20GLA0

RANKPI Training

Radio Connection Performance MeasurementsM1016, M1017, M1018, M1024 - M1027


Measurements on radio connection level

• M 1016 OLPC & DL Radio Link Power• M 1017 RLC AM • M 1018 UEQ• Pre-aggregated RCPM measurements M1024-M1027


Radio Connection Performance Measurements (RCPM)

This feature provides basic handling of the Radio Connection performance Measurements (RCPM).The RCPM includes the RCPM RLC, UEQ and OLPC measurements. RCPM measures quality of radio connection and throughput between UE and RNC for both Uplink and Downlink connections.RCPM can be used for monitoring, reporting and optimisation purpose

RCPM measurement area is optional. RCPM measurements M1016-M1018 are under same option.

ReporterDB

RNC

NEMU

NetAct

Meas. ManData Storing

UMAPM Core

Reporting SuiteOptimizer

Planning Tool

Conf.DBMeas. Man.

Plan download/upload.

RNW CM

RNWDB

OLPCRLC

Common Statistics

L3 Telecom

RAC

Green arrows: starting and stopping measurementsBlue arrows shows data storing, monitoring and analysing


Radio Connection Performance Measurement

RCPM consists of three measurement types that can be separately activated

• M1017 RCPM RLC – Radio Link Control Measurements– Performance of Downlink radio connections using AM RLC

• M1016 RCPM OLPC – Outer loop Power Control Measurements – Performance of Uplink radio connections – DCH-specific BLER, BER and

Eb/No – Performance of downlink Radio Link transmission power

• M1018 RCPM UEQ – UE Quality Measurements – Performance of Downlink radio connections using UM or TM RLC – DL

BLER


M1016 Outer Loop Power Control and Radio Link Measurements


• RCPM OLPC measurement provides information on uplink radio

• connection quality and on downlink radio link power. It is based

• on information available for the OLPC and NBAP entities of the RNC.

• The RL transmission power calculation can be used for network optimisation purpose

• The measurement is carried out in the serving RNC (SRNC).

RCPM M1016


Uplink radio connection quality

• DCH-specific Eb/No, BER and BLER values are derived from OLPC algorithm

• Number of received transport blocks with CRC OK/NOK• Number of times that the connection quality is estimated to be bad,

ideal or too good.Downlink Radio Link power• Radio link transmission power values is obtained

from the dedicated measurement report message received from the BTS. The measurement result is associated with the service (RAB) and transport channel (DCH) carried on the radio link

• The average, variance and outage percentage of the transmission power is calculated for different traffic classes, bit rates and error targets.

• The Tx power of one radio link is obtained from 3GPP NBAP; Dedicated measurement report/Nokia NBAP; Radio link measurement report messages sent by UE

RCPM M1016


Supported Connection types:

RCPM M1016


RCPM M1016 Counters supported (example results from NTN)


AMR 12.2kbps call – DL radio link power analysis


PS 64 kbps – DL radio link power analysis


M1017 Acknowledged Mode Radio Link Control Measurements


Measurement M1017 RCPM RLC

M1017 Measurements inside RNC


Protocol Layer in 3GPP

source: 3GPP TS 25301-440

Control Plane User Plane

M1017Measurements

• Measurement provides information about RLC performance

• Supported for Acknowledge Mode (AM) traffic

• User Plane data is measured


Measurements M1017 in NSN RNC

PDCP Buffer Occupancy

DL RLC SDU transfer from PDCP to RLC

• DL RLC transmission buffer occupancy• DL RLC discards due to max. re-transmissions/time

• DL RLC PDU transfer from RLC to MAC incl. retrans.

• DL RLC PDU transfer success

UL RLC PDU transfer from MAC to RLC

UL RLC SDU transfer from RLC to RLC


Measurements M1017 in NSN RNC

Net Throughput

Net Throughput (without re-transmissions) for INTERACTIVE or BACKGROUND class traffic using DCH.

secondsation Period_dur

MEAS_TIMERLC_AM_DL_ M1017C29_DL_NET_TPRLC_AM_PDU M1017C15RNC_611a DCHs NRT R99 all

secondsation Period_dur

MEAS_TIMERLC_AM_DL_ M1017C29_DL_NET_TPRLC_AM_PDU M1017C15RNC_613a DCSHs-HS NRT all

Rel99 DCH:

HSDPA:

The formula is the same as above but the reporting system can make a difference between HS-DSCH and R99 DCH NRT throughput


RLC throughput for DCH and HS-DSCH

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201916420

3840004294967295

Average of c15

dwObj2 RealIntervalStartTime

dwObj3


RLC Retransmission Distribution

When the RLC AM connection is modified or released The number of downlink RLC AM PDUs which have been successfully delivered to the UE without retransmissions. : M1017C44 RLC_RETRANS_DISTR_CLASS_0

The number of downlink RLC AM PDUs which have been successfully delivered to the UE with one retransmission: M1017C45 RLC_RETRANS_DISTR_CLASS_1

The number of downlink RLC AM PDUs which have been successfully delivered to the UE with two retransmission: M1017C46 RLC_RETRANS_DISTR_CLASS_2

The number of downlink RLC AM PDUs which have been successfully delivered to the UE with three retransmission: M1017C47 RLC_RETRANS_DISTR_CLASS_3

The number of downlink RLC AM PDUs which have been successfully delivered to the UE with four retransmission: M1017C48 RLC_RETRANS_DISTR_CLASS_4

The number of downlink RLC AM PDUs which have been successfully delivered to the UE with five or more retransmission: M1017C49 RLC_RETRANS_DISTR_CLASS_5


RLC retransmission distribution [%]

90%

91%

92%

93%

94%

95%

96%

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100%

6400

038

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4294

9672

9564

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3840

0042

9496

7295

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9496

7295

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9496

7295

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4294

9672

9564

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9496

7295

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4294

9672

9564

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3840

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9496

7295

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038

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4294

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9564

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3840

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9496

7295

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4294

9672

9564

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3840

0042

9496

7295

28-Apr 29-Apr 30-Apr 01-May 02-May 03-May 04-May 05-May 06-May 07-May 08-May 09-May 10-May 11-May

Sum of c49Sum of c48Sum of c47Sum of c46Sum of c45Sum of c44

RealIntervalStartTime dwObj3

Data


M1018 Unacknowledged Mode / Transparent Mode Radio Link Control Measurements


UE Quality Measurements (UEQ)

Provides information about downlink radio connections qualityFor RLC Unacknowledged (UM) and Transparent Mode (TM)• CS Voice• CS Transparent (H.324m video call “UDI”)• CS non- Transparent Data (Streaming)• PS RT Data (Streaming)Measurement Quantity is downlink BLERMeasurement object is • WCEL and• Connection TypeThe recommended maximum number of cells to be measured per RNC is 600 (OMS load stays in acceptable range)


UE Quality Measurements

3GPP TS25.331 defines “Reporting Event 5A” for DL DCH quality reporting

• Obtained average BLER value is only the average of the reported BLER values, those who exceeded the threshold, not the real experienced average BLER value of the measured connection type.

• The threshold based measurement does not even directly give the ratio between experienced BLERs under and over the threshold

Implementation in Nokia RAN is modified “Reporting Event 5A “ to cover the full picture:• RNC commands UE to set-up downlink BLER measurement when UM/TM connection is in

CELL_DCH• Periodical reporting from UE; low frequency (default reporting interval = 16000 ms)

3GPP: Event triggered if DL Quality is below predefined threshold


UE Quality MeasurementsProcedure

Measurement activation in RNC OMSRNC commands UE to set-up downlink BLER measurementPeriodical reporting from UE

RRC: Measurement Control

RRC: Measurement Report


Amount of Reporting = InfinityTransfer Mode = UM RLCMeasured Quantity = TrCH for BLER reportingDL TrCH Identity

Range : 4, 6, 8, 12, 16, 20, 24, 28, 32, 64 secDefault: 16 sec


Measurement activationin RNC OMS

RNC: UE QualityRepInterv


Reported value Measured quantity value Unit

BLER_LOG _00 Transport channel BLER = 0 -

BLER_LOG _01 - < Log10(Transport channel BLER) < ‑4.03 -

BLER_LOG _02 -4.03 Log10(Transport channel BLER) < ‑3.965 -

BLER_LOG _03 -3.965 Log10(Transport channel BLER) < ‑3.9 -

… … …

BLER_LOG _61 -0.195 Log10(Transport channel BLER) < -0.13 -

BLER_LOG _62 -0.13 Log10(Transport channel BLER) < -0.065 -

BLER_LOG _63 -0.065 Log10(Transport channel BLER) 0 -

UE Quality MeasurementsValue mapping as defined in TS25.133

UE reports up to N Quality values; depending on number N of established DCHs


UE Quality MeasurementsRNC calculates DL BLER counters

NueQual

BLERAveBLER

NueQual

ii

1

AveBLER: average BLER value for the measured object type calculated from BLER values reported by UEs• NueQual: Total number of received quality reports from UEs

• SquarSumBLER: Sum of squared BLER values . Calculated as:

NueQual

iiSumBLERERSquarSumBL

1

2


UE Quality Measurements

CountersM1018C0 Average BLER from Quality Measurements

The average block error rate for the downlink radio connection, measured by using the UE Quality Measurement.

M1018C1 Received Quality reports from UEsThe number of received quality reports from UEs.

M1018C2 Sum of squared UEQ BLER valuesSum of squared BLER values.


Pre-aggregation of RCPM data in RNC (optional feature RAN 1188)


Pre-aggregation of RCPM data in RNC: Overview

• The feature provides new measurements to increase usability of RCPM

• Details not needed for day-to-day monitoring are removed

• The operator can use the pre-aggregated RCPM data to full extent also for basic network measuring (Network wide reports for: RNC - UE data amounts).

• The new measurements can be operated for all RNCs simultaneously

• It offers a centralized administration from NetAct


Pre-aggregation of RCPM data in RNC: Implementation• Measurements on RNC level

– M1025 RCPM OLPC RNC– M1027 RCPM RLC RNC

(The following object levels are filtered out compared to the raw RCPM measurements: WBTS/WCEL+MCC/MNC, RB DL/UL bitrate, SDU error ratio)

• Measurements on Cell level– M1024 RCPM OLPC WCEL– M1026 RCPM RLC WCEL

(The following object levels are filtered out compared to the raw RCPM measurements: traffic handling priority, RAB DL/UL max. bitrate, RB DL/UL bitrate, SDU error ratio)


Pre-aggregation of RCPM data in RNC: Interdependencies between features• The feature licenses for basic (raw) RCPM and pre-aggregated RCPM

measurements needs to be activated• The existing raw RCPM measurements for M1016 and M1017 and their

contents are not changed and can be operated as before, but with restrictions to a maximum cell count of 600 cells. M1018 can still be used for all cells

• If raw RCPM measurements and pre-aggregated RCPM measurements shall be activated simultaneously, they can be measured only for "active set filter" parameter equal to “all connections (active set size >=1)”.

• If pre-aggregated RCPM measurements on cell level are started from NetAct, the measurements are activated always for all cells controlled by the selected RNCs.

• Eventually existing different configurations for pre-aggregated RCPM measurements made by RNC Element Manager are overwritten by the NetAct configuration


Thank You !

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09_RN31589EN20GLA0_RCPM