owo203050 wcdma ran traffic kpi and relative counters ran11 issue1.00

WCDMA RAN Traffic KPI and Relative Counters

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Page0Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved.

Revision Record

1.00BSC6810V200R011

C00

RNCOWJ40

Course Version ISSUEProduct VersionProductCourse Code

NewMi Jia2009-07-24Guo Yang

New/UpdateApproverTimeDeveloper/Modifier

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Copyright © 2009 Huawei Technologies Co., Ltd. All rights reserved.





Foreword

Traffic KPI is one of the most important KPI in the UMTS

Network. For Huawei KPI system, traffic KPI includes the

following items:




Objectives

Upon completion of this course, you will be able to:

Describe the Huawei RNC Traffic KPI and Related Counters

Describe the Huawei Cell Traffic KPI and Related Counters

Describe the Huawei Cell Load KPI and Related Counters




Contents

1. RNC Traffic KPI and Related Counters

2. Cell Traffic KPI and Related Counters

3. Cell Load KPI and Related Counters




Contents


1.1 RNC Traffic KPI for AMR 12.2kbps Services

1.2 RNC Traffic KPI for Video Phone 64kbps Services

1.3 RNC Traffic KPI for PS R99 DL Throughput

1.4 RNC Traffic KPI for HSDPA DL Throughput

1.5 RNC Traffic KPI for HSUPA UL Throughput

1.6 RNC Traffic KPI for PS MBMS DL Throughput




AMR 12.2kbps Traffic (Erlang)

According to Huawei definition, the AMR 12.2kbps Traffic is

obtained from the following counters:

Number of UE connections allocated in downlink 12.2kbps

AMR RATE

VS.AMR.RB.DL.12.2

There are other counter to measure the AMR service traffic with different rate:

VS.AMR.RB.UL.4.75 VS.AMR.RB.DL.4.75








For all the above counters:

The measurement items provide the mean number of UEs that use the AMR speech services at different bit rates in both uplink and downlink directions in the RNC.

The RNC periodically takes a sample from the number of AMR speech UEs at each of the eight UL and DL bit rates. At the end of the measurement period, the RNC divides the accumulated number by the number of samples to obtain the mean number of AMR speech UEs at each rate.




Contents

1. RNC Traffic KPI for All Services and Related Counters










Video Phone 64kbps Traffic (Erlang)

According to Huawei definition, the Video Phone 64kbps Traffic

is obtained from the following counters:

Number of 64 kbit/s Conversational Service RBs in CS Domain

DL Directions

VS.RB.DLConvCS.64.RNC

VS.RB.DLConvCS.64.RNC

VS.RB.ULConvCS.64.RNC

The measurement items provide the mean number of 64 kbit/s conversational service RBs in the CS domain in the UL and DL directions.

The RNC periodically takes a sample from the number of 64 kbit/s conversational service RBs in the CS domain in the UL and DL directions. At the end of themeasurement period, the RNC divides the accumulated number of RBs at one bit rate by the number of samples to obtain the mean number of such RBs.




Contents











Traffic KPI for PS R99 DL Throughput (kbps)

According to Huawei definition, the PS R99 DL Throughput is


DL Traffic of R99 PS Domain in RNC

VS.R99PSLoad.DLThruput.RNC

VS.R99PSLoad.DLThruput.RNC

This measurement item provides the downlink traffic of all the R99 services in the PS domain within the RNC.

The RNC periodically takes a sample from the downlink traffic values of all the R99 services in the PS domain. At the end of the measurement period, the RNC divides the accumulated traffic values by the number of samples to obtain the mean downlink traffic of all the R99 services in the PS domain.The downlink traffic of all the R99 services in the PS domain refers to the traffic measured at the RLC layer. The data does not include the RLC head data.




Contents











Traffic KPI for HSDPA DL Throughput (kbps)

According to Huawei definition, the HSDPA DL Throughput is


DL Traffic of HSDPA PS Domain in RNC

VS.HSDPAPSLoad.DLThruput.RNC

VS.HSDPAPSLoad.DLThruput.RNC

This measurement item provides the downlink traffic of all the HSDPA services in the PS domain within the RNC.

The RNC periodically takes a sample from the downlink traffic values of all the HSDPA services in the PS domain. At the end of the measurement period, the RNC divides the accumulated traffic values by the number of samples to obtain the mean downlink traffic of all the HSDPA services in the PS domain.The downlink traffic of all the HSDPA services in the PS domain refers to the traffic measured at the RLC layer. The data does not include the RLC head data.




Contents











Traffic KPI for HSUPA UL Throughput (kbps)

According to Huawei definition, the HSUPA UL Throughput is


UL Traffic of HSUPA PS Domain in RNC

VS.HSUPAPSLoad.ULThruput.RNC

VS.HSUPAPSLoad.ULThruput.RNC

This measurement item provides the uplink traffic of all the HSUPA services in the PS domain within the RNC.

The RNC periodically takes a sample from the uplink traffic values of all the HSUPA services in the PS domain. At the end of the measurement period, the RNC divides the accumulated values by the number of samples to obtain the mean uplink traffic of all the HSUPA services in the PS domain.The uplink traffic of all the HSUPA services in the PS domain refers to the traffic obtained at the RLC layer. The data does not include the RLC head data.




Contents











Traffic KPI for PS MBMS DL Throughput (kbps)

According to Huawei definition, the HSUPA UL Throughput is


DL Traffic of MBMS PS Domain in RNC

VS.MBMSPSLoad.DLThruput.RNC

VS.MBMSPSLoad.DLThruput.RNC

This measurement item provides the downlink traffic of all the MBMS services in the PS domain within the RNC.

The RNC periodically takes a sample from the downlink traffic values of all the MBMS services in the PS domain. At the end of the measurement period, the RNC divides the accumulated traffic values by the number of samples to obtain the mean downlink traffic of all the MBMS services in the PS domain.The downlink traffic of all the MBMS services in the PS domain refers to the traffic measured at the RLC layer. The data does not include the RLC head data.




Contents







Contents


2.1 Cell Traffic KPI for Common Channels

2.2 Cell Traffic KPI for All Services

2.3 Cell Traffic KPI for HSDPA DL Throughput

2.4 Cell Traffic KPI for HSUPA UL Throughput




FACH Utility Ratio

According to Huawei definition, the FACH Utility Ratio is

calculated by the following formula:

Traffic Volume on IUB_FACH (Cell)

VS.MAC.CRNCIubBytesFACH.TX

CRNC_Iub FACH Bandwidth (Cell)

VS.CRNC.IUB.FACH.Bandwidth

dwidthB.FACH.BanVS.CRNC.IU*3600ACH.TxCIubBytesFVS.MAC.CRN Ratio Utility FACH =

The FACH Utility Ratio should be calculated based on one busy hour.

VS.MAC.CRNCIubBytesFACH.TX

This measurement item provides the number of DL MAC PDU bytes sent by the CRNC on the FACH FP over the Iub interface in a cell.

The measurement is triggered when the CRNC sends DL data on the FACH FP over the Iub interface.

VS.CRNC.IUB.FACH.Bandwidth

The measurement items provide the common channel bandwidth on the Iubinterface in a cell

The measurement is triggered when the CRNC sets up or deletes a common channel on the Iub interface.




RACH Utility Ratio

According to Huawei definition, the RACH Utility Ratio is


Traffic Volume on IUB_RACH (Cell)

VS.MAC.CRNCIubBytesRACH.Rx

CRNC_Iub RACH Bandwidth (Cell)

VS.CRNC.IUB.RACH.Bandwidth

dwidthB.RACH.BanVS.CRNC.IU*3600ACH.RxCIubBytesRVS.MAC.CRN Ratio Utility RACH =

The RACH Utility Ratio should be calculated based on one busy hour.

VS.MAC.CRNCIubBytesRACH.Rx

This measurement item provides the number of UL MAC PDU bytes sent by the CRNC on the RACH FP over the Iub interface in a cell.

The measurement is triggered when the CRNC sends UL data on the RACH FP over the Iub interface.

VS.CRNC.IUB.RACH.Bandwidth






PCH Utility Ratio

According to Huawei definition, the PCH Utility Ratio is


Traffic Volume on IUB_PCH (Cell)

VS.MAC.CRNCIubBytesPCH.Tx

CRNC_Iub PCH Bandwidth (Cell)

VS.CRNC.IUB.PCH.Bandwidth

dwidthB.RACH.BanVS.CRNC.IU*3600CH.TxCIubBytesPVS.MAC.CRN Ratio Utility PCH =

The PCH Utility Ratio should be calculated based on one busy hour.

VS.MAC.CRNCIubBytesPCH.Tx

This measurement item provides the number of DL MAC PDU bytes received by the CRNC on the PCH FP over the Iub interface. These bytes include paging data transport blocks and paging indication (PI) data.

The measurement is triggered when the CRNC sends DL data on the PCH FP over the Iub interface.

VS.CRNC.IUB.PCH.Bandwidth






Contents









Cell CS Service Traffic Volume

Measurement value for different CS services on Iub interface

UL CS Conversational Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesCSConv.Rx

UL CS Streaming Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesCSStr.Rx

DL CS Conversational Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesCSConv.Tx

DL CS Streaming Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesCSStr.Tx

VS.MAC.SRNCIubBytesCSConv.Rx

This measurement item provides the number of UL MAC PDU bytes sent by the SRNC to the MAC-d on the CS conversational service bearer (DCH FP) over the Iubinterface in a cell.

The measurement is triggered when the SRNC sends UL data on the CS conversational service bearer DCH FP over the Iub interface in a cell.

VS.MAC.SRNCIubBytesCSStr.Rx

This measurement item provides the number of UL MAC PDU bytes sent by the SRNC to the MAC-d on the CS streaming service bearer (DCH FP) over the Iubinterface in a cell.

The measurement is triggered when the SRNC sends UL data on the CS streaming service bearer DCH FP over the Iub interface.

VS.MAC.SRNCIubBytesCSConv.Tx

This measurement item provides the number of DL MAC PDU bytes sent by the SRNC on the CS conversational service bearer DCH FP over the Iub interface in a cell.

The measurement is triggered when the SRNC sends DL data on the CS conversational service bearer DCH FP over the Iub interface.

VS.MAC.SRNCIubBytesCSStr.Tx

This measurement item provides the number of DL MAC PDU bytes sent by the SRNC on the CS streaming service bearer DCH FP over the Iub interface in a cell.

The measurement is triggered when the SRNC sends DL data on the CS streaming service bearer DCH FP over the Iub interface in a cell.




Measurement value for different PS services on Iub interface

UL PS Streaming Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesPSStr.Rx

UL PS Interactive Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesPSInt.Rx

UL PS Background Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesPSBkg.Rx

Cell PS Service Traffic Volume

VS.MAC.SRNCIubBytesPSStr.Rx

This measurement item provides the number of UL MAC PDU bytes sent by the SRNC to the MAC-d on the PS streaming service bearer (DCH FP) over the Iubinterface in a cell.

The measurement is triggered when the SRNC sends UL data on the PS streaming service bearer DCH FP over the Iub interface in a cell.

VS.MAC.SRNCIubBytesPSInt.Rx

This measurement item provides the number of UL MAC PDU bytes sent by the SRNC to the MAC-d on the PS interactive service bearer (DCH FP) over the Iubinterface in a cell.

The measurement is triggered when the SRNC sends UL data on the PS interactive service bearer DCH FP over the Iub interface in a cell.

VS.MAC.SRNCIubBytesPSBkg.Rx

This measurement item provides the number of UL MAC PDU bytes sent by the SRNC to the MAC-d on the PS background service bearer (DCH FP) over the Iubinterface in a cell.

The measurement is triggered when the SRNC sends UL data on the PS background service bearer DCH FP over the Iub interface in a cell.




Cell PS Service Traffic Volume

Measurement value for different PS services on Iub interface

DL PS Streaming Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesPSStr.Tx

DL PS Interactive Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesPSInt.Tx

DL PS Background Traffic Volume on Iub Interface (Cell)

VS.MAC.SRNCIubBytesPSBkg.Tx

VS.MAC.SRNCIubBytesPSStr.Tx

This measurement item provides the number of DL MAC PDU bytes sent by the SRNC on the PS streaming service bearer DCH FP over the Iub interface in a cell.

The measurement is triggered when the SRNC sends DL data on the PS streaming service bearer DCH FP over the Iub interface in a cell.

VS.MAC.SRNCIubBytesPSInt.Tx

This measurement item provides the number of DL MAC PDU bytes sent by the

SRNC on the PS interactive service bearer DCH FP over the Iub interface in a cell.

The measurement is triggered when the SRNC sends DL data on the PS interactive

service bearer DCH FP over the Iub interface in a cell.

VS.MAC.SRNCIubBytesPSBkg.Tx

This measurement item provides the number of bytes of the DL MAC PDU sent by

the SRNC on the PS background service bearer DCH FP over the Iub interface in a

cell.

The measurement is triggered when the SRNC sends DL data on the PS

background service bearer DCH FP over the Iub interface in a cell.




Cell AMR Service Traffic

Mean Number of AMR Speech UEs at Different UL and DL Bit Rates

(Cell)

VS.AMR.Ctrl.UL4.75 VS.AMR.Ctrl.DL4.75








For all the above conters:

The measurement items provide the mean number of UEs that use the AMR speech service at different UL and DL bit rates in the cell.

The RNC periodically takes a sample from the number of UEs that use the AMR speech service at the eight different UL and DL rates in the cell. At the end of the measurement period, the RNC divides the accumulated number by the number of samples to obtain the mean number of UEs that use the AMR speech service at each bit rate.




Cell PS Service Traffic

Mean Number of R99 PS Service RBs at Different UL and DL Bit Rates (Cell)

VS.RB.ULStrPS.DifferentServiceRate1

VS.RB.DLStrPS.DifferentServiceRate1

VS.RB.ULInterPS.DifferentServiceRate2

VS.RB.DLInterPS.DifferentServiceRate2

VS.RB.ULBkgPS.DifferentServiceRate2

VS.RB.DLBkgPS.DifferentServiceRate2

Where “DifferentServiceRate1” means the rates are: 8, 16, 32, 64, 128, 144, 256,

256384 (kbps)

Where “DifferentServiceRate2” means the rates are: 8, 16, 32, 64, 128, 144, 256,

384 (kbps)

The measurement items provide the mean number of PS streaming/interactive/background service R99 RBs at the different bit rates in a cell, that is, the mean number of R99 RBsobtained at the sampling points in the cell in the measurement period.

The RNC periodically takes a sample from the number of PS streaming service RBs at different bit rates. At the end of the measurement period, the RNC divides the accumulated number of PS streaming service RBs at different bit rates by the number of samples to obtain the mean number of the PS streaming service RBs. In this case, the RNC measures the item in the specified cell.

DifferentServiceRates1 are 8, 16, 32, 64, 128, 144, 256,256384, DifferentServiceRates2

are 8, 16, 32, 64, 128, 144, 256,384. For example:

VS.RB.ULStrPS.8 : Mean number of PS streaming service RBs at the UL rate of 8 kbit/s

VS.RB.DLStrPS.8 : Mean number of PS streaming service RBs at the DL rate of 8 kbit/s

VS.RB.ULStrPS.256384 : Mean number of PS streaming service RBs at the DL rate of (256,384] kbit/s

VS.RB.ULInterPS.384 : Mean number of PS interactive service RBs at the UL rate of 384 kbit/s

VS.RB.DLInterPS.384 : Mean number of PS interactive service RBs at the DL rate of 384 kbit/s

VS.RB.ULBkgPS.384 : Mean number of PS background service RBs at the UL rate of 384 kbit/s

VS.RB.DLBkgPS.384 : Mean number of PS background service RBs at the DL rate of 384 kbit/s

Etc.




Contents









HSDPA RLC Traffic Volume (MBytes)

According to Huawei definition, the HSDPA RLC Traffic Volume

is calculated by the following formula:

Number of Transmitted Downlink Bytes in MAC-d Flow (Cell)

VS.HSDPA.MeanChThroughput.TotalBytes

1024*1024lBytesghput.TotaeanChThrouVS.HSDPA.MlMBytesghput.TotaeanChThrouVS.HSDPA.M =

VS.HSDPA.MeanChThroughput.TotalBytes

This measurement item provides the number of bytes in the transmitted downlink data in the MAC-d flow in a cell.

When data is transmitted in an HSDPA cell, the RNC measures the total number of bytes in the transmitted downlink data at the RLC layer for the MAC-d flow in the cell. The RLC header overheand and the retransfer data are excluded.




HSDPA RLC Throughput (Mbps)

According to Huawei definition, the HSDPA RLC Traffic Volume


Where SP means Sampling Period of the counter, the unit is

minute

60*SP*1024*10248*lBytesghput.TotaeanChThrouVS.HSDPA.MlMBpsghput.TotaeanChThrouVS.HSDPA.M =




HSDPA Mean UE

According to Huawei definition, the HSDPA Mean UE is

calculated by the following counter:

Mean Number of HSDPA UEs in a Cell

VS.HSDPA.UE.Mean.Cell

VS.HSDPA.UE.Mean.Cell

This measurement item provides the mean number of HSDPA UEs in a serving cell. The value of this unit is lower than or equal to that of the VS.CellDCHUEsmeasurement.

The RNC periodically takes a sample from the number of HSDPA UEs in the cell. At the end of the measurement period, the RNC divides the accumulated number of UEs by the number of samples to obtain the mean number of HSDPA UEs in the measurement period.




Contents









HSUPA RLC Traffic Volume (MBytes)

According to Huawei definition, the HSUPA RLC Traffic Volume


Number of Bytes in Received Uplink Data at the RLC Layer of

Mac-d flow (Cell)

VS.HSUPA.MeanChThroughput.TotalBytes

1024*1024lBytesghput.TotaeanChThrouVS.HSUPA.MlMBytesghput.TotaeanChThrouVS.HSUPA.M =

VS.HSUPA.MeanChThroughput.TotalBytes

This measurement item provides the total number of bytes in the received uplink data at the RLC layer for all the MAC-d flows in a cell.

When data is received in an HSUPA active cell, the RNC measures the total number of bytes in the received uplink data at the RLC layer for the MAC-d flow in the cell. The RLC header overhead and the retransfer data are excluded.




HSUPA RLC Throughput (Kbps)

According to Huawei definition, the HSUPA RLC Traffic Volume


Where SP means Sampling Period of the counter, the unit is

minute

60*SP*10248*lBytesghput.TotaeanChThrouVS.HSUPA.M.Throughputbps.MeanChVS.HSUPA.K =




HSUPA Mean UE

According to Huawei definition, the HSUPA Mean UE is

calculated by the following counter:

Mean Number of HSUPA in a cell

VS.HSUPA.UE.Mean.Cell

VS.HSUPA.UE.Mean.Cell

This measurement item provides the mean number of HSUPA UEs in a cell, which is measured in E-DCH active set. The measurement does not contain the HSUPA UEsunder the DRNC.

The RNC periodically takes a sample from the number of HSUPA UEs in the cell. At the end of the measurement period, the RNC divides the accumulated number of UEs by the number of samples to obtain the mean number of HSUPA UEs in the measurement period.




Contents







Contents


3.1 Cell Load KPI for Power

3.2 Cell Load KPI for Channel Element

3.3 Cell Load KPI for DL OVSF Code




Cell UL Power Load (UL Interference)

According to Huawei definition, the Cell UL Power Load is calculated by the

following counter:

Mean RTWP of a cell

VS.MeanRTWP : mean value of all RTWPs reported in a certain period

Maximum RTWP of a cell

VS.MaxRTWP : maximum value of all RTWPs reported in a certain period

Minimum RTWP of a cell

VS.MinRTWP : minimum value of all RTWPs reported in a certain period

Where PN is the thermal noise which is around -106dBm

10P-RTWP N

10

11 oadUL_Power_L −=

RTWP (Received Total Wideband Power) analysis is used to evaluate the uplink interference and loading status. If actual loading of the network is empty, then the RTWP is the thermal noise plus the noise figure of the NodeB. With the access of more users in the network, RTWP increases accordingly.

The basic principles are:

RTWP at busy hour(BH) in one day should not exceed 1dB over the target loading of the network.

If HSUPA service is not activated, then 50% target loading is suggested, otherwise 75% uplink target loading should be used.

Since RTWP would be also influenced by the external interference, the RTWP result is just for reference, cannot be used for the reason of expansion directly.

The measurement is triggered at point A as shown in figure, when the RNC receives from the NodeB a COMMON MEASUREMENT REPORT message about the RTWP of a cell and obtains the RTWP of the cell. In this case, the RNC measures the items in this cell.




Cell Total DL Power Load

According to Huawei definition, the Cell Total DL Power Load is calculated by

the following formula:

Mean TCP of a cell

VS.MeanTCP : mean value of all TCP s reported in a certain period

Maximum TCP of a cell

VS.MaxTCP : maximum value of all TCPs reported in a certain period

Minimum TCP of a cell

VS.MinTCP : minimum value of all TCPs reported in a certain period

l_TCP_Total_CelConfiguredTCP tioUtility_RaTotal_TCP_ =

TCP is used to assess the downlink power consumption, which represents the downlink loading status. Evaluation of TCP power is helpful to avoid the congestion due to the insufficient power in downlink.

The basic principles for the TCP utilization are:

1. The mean R99 TCP Utility Ratio should not exceed 70%

2. No service failure is caused by the insufficient TCP power.

If 1) is not met, then more carrier or more sites are suggested, if 2) is not met, then more research are needed together with the actual traffic model.

The measurement is triggered at point A as shown in the figure, when the RNC obtains the TCP of a cell after receiving from the NodeB a COMMON MEASUREMENT REPORT message containing the TCP values of the cell. In this case, the RNC measures the items in this cell.




Cell Non-HSPA DL Power Load

According to Huawei definition, the Cell Non-HSPA DL Power Load is


Mean non-HSPA TCP of a cell

VS.MeanTCP.NonHS : mean value of all non-HSPA TCPs reported in a certain period

Maximum non-HSPA TCP of a cell,

VS.MaxTCP.NonHS : maximum value of all non-HSPA TCPs reported in a certain

period

Minimum non-HSPA TCP of a cell

VS.MinTCP.NonHS : minimum value of all non-HSPA TCPs reported in a certain

period

l_TCP_Total_CelConfiguredTCP.NonHS _RatioCP_UtilityNon_HSPA_T =

The basic principles for the TCP utilization are:

1. The mean R99 TCP Utility Ratio should not exceed 70%

2. No service failure is caused by the insufficient TCP power.

If 1) is not met, then more carrier or more sites are suggested, if 2) is not met, then more research are needed together with the actual traffic model.

The measurement is triggered at point A as shown in the figure, when the RNC obtains the non-HSPA TCP of a cell after it receives from the NodeB a COMMON MEASUREMENT REPORT message containing the non-HSPA TCP values of the cell. In this case, the RNC measures the items in this cell.




Cell HSDPA DL Power Load

According to Huawei definition, the Cell HSDPA DL Power Load

is calculated by the following counters:

Mean HSDPA-required power of an HSDPA cell

VS.HSDPA.MeanRequiredPwr : mean value of all HSDPA-required power

reported in a certain period

Maximum HSDPA-required power of an HSDPA cell

VS.HSDPA.MaxRequiredPwr : maximum value of all HSDAP-required

power reported in a certain period

Minimum HSDPA-required power of an HSDPA cell

VS.HSDPA.MinRequiredPwr : minimum value of all HSDPA-required

power reported in a certain period

The measurement is triggered at point A as shown in the figure, when the RNC obtains the HSDPA-required power of an HSDPA cell after it receives from the NodeB a COMMON MEASUREMENT REPORT message containing the values of the cell. In this case, the RNC measures the items in this cell.




Contents








Cell Channel Element Load

According to Huawei definition, the Cell Channel Element Load

is calculated by the following counter:

Mean CE Usages (Cell) :

UL_Mean_Used_CE_Number = VS.LC.ULCreditUsed.CELL / 2

DL_Mean_Used_CE_Number = VS.LC.DLCreditUsed.CELL

Note: CE resource are shared by all the cells in one NodeB

ber_UL_CE_NumConfigureder_in_BHed_CE_NumbUL_Mean_Us (NodeB) ity_RatioUL_CE_Util =

ber_DL_CE_NumConfigureder_in_BHed_CE_NumbDL_Mean_Us (NodeB) ity_RatioDL_CE_Util =

CE is the baseband resources for services in NodeB. CE utilization ratio represents the base band resources consumption status of the NodeB. If the CE utilization ratio exceeds one specified threshold of the total CE, that means CE resources are going to be the limitation factor of the network. CE expansion is needed in this case.

The CE utilization ratio should not exceed 70% due to HUAWEI’s experiences.

CE is called NodeB credit on the RNC side and called Channel Element on the NodeB side. It is used to measure the channel demodulation capability of NodeBs.

For each data rate and service, the number of UL credits is equal to the number of UL CEsmultiplied by 2. This is because the RESOURCE STATUS INDICATION message over the Iubinterface supports only integers. For example, a UL 32 kbit/s PS service consumes 1.5 CEs. Then, the number of corresponding UL credits consumed is 3, an integer, which can be carried in the RESOURCE STATUS INDICATION message.




Related Counter

Mean UL credit usage (cell)

VS.LC.ULCreditUsed.CELL

Mean DL credit usage (cell)

VS.LC.DLCreditUsed.CELL

There are several counters which can show the Credit utilization:

VS.LC.ULCreditUsed.CELLMean : UL credit usage (cell)

VS.LC.ULCreditUsed.CELL.MaxMaximum : UL credit usage (cell)

VS.LC.ULCreditUsed.CELL.MinMinimum : UL credit usage (cell)

VS.LC.DLCreditUsed.CELLMean : DL credit usage (cell)

VS.LC.DLCreditUsed.CELL.MaxMaximum : DL credit usage (cell)

VS.LC.DLCreditUsed.CELL.MinMinimum : DL credit usage (cell)

The measurement items provide the mean, maximum, and minimum credit usages in a cell.

The RNC periodically takes samples from the UL credit usage and DL credit usage in the cell. At the end of the measurement period, the RNC calculates the maximum and minimum usages of CE resources, and divides the accumulated usages by the number of samples to obtain the mean usage of both UL and DL CE resources in the measurement period.




Contents








Cell DL OVSF Code Load

According to Huawei definition, the Cell DL OVSF Code Load is


Mean Number of Occupied Codes (Cell)

VS.RAB.SFOccupy

Note:

The code number is normalized to SF = 256

The occupied codes are the codes occupied by the common channel, R99 user,

and HS-DSCH

deailable_CoMax_R99_Avn_BHsed_Code_iR99_Mean_U iotility_RatR99_Code_U =

Codes here are the OVSF codes for both R99 and HSPA services. If the codes utilization ratio exceeds one specified threshold of the total available OVSF codes, that means codes resources are going to be the limitation factor of the network.

The basic principles for the codes utilization are:

1. The codes utilization for R99 services should not exceed 70%.

2. No congestion due to codes in busy hour of the cell.

If 1）is not met, the codes allocation between R99 services and HSDPA services can be adjusted firstly according to the service distribution. If it is still not OK, then more carriers and sites are suggested If 2) is not met for a period of time, the adjustment suggestion is the same to 1).

VS.RAB.SFOccupy

The measurement items provide the mean number and the maximum number of occupied codes in a cell. The occupied codes are the codes occupied by the common channel, R99 user, and HS-DSCH. The code number is normalized to SF = 256, that is, converted to the code number when SF = 256. The way of the normalization to SF = 256 is to multiply the number when SF = k by 256/k.

Max_R99_Available_Code= 256 - Common channels(8 SF=256) - HSPDSCH (5 SF=16)*16 –HsScchCodeNum ( 4 SF=128) * 2 – EAGCHCodeNum( 0 SF=256)–ERGCHEHICHCodeNum(0 SF=128) * 2

R99_Mean_Used_Code_in_BH = VS.RAB.SFOccupy - Common channels(8 SF=256) -HSPDSCH (5 SF=16)*16 – HsScchCodeNum ( 4 SF=128) * 2 – EAGCHCodeNum( 0 SF=256) – ERGCHEHICHCodeNum(0 SF=128) * 2




Summary

In this course, we learn the Huawei Traffic KPI and Counter

System, including:

RNC Traffic KPI and Related Counters

Cell Traffic KPI and Related Counters

Cell Load KPI and Related Counters



Thank youwww.huawei.com

owo203050 wcdma ran traffic kpi and relative counters ran11 issue1.00

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important kpi

huawei cell load kpi

traffic erlangz