rn31584en10gla0 utran capacity
TRANSCRIPT
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UTRAN Capacity Measurements
RANKPI Training
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Agenda
•RAB resource allocation sequence
– Power resource measurements
– Code resource measurement
– WBTS resource measurement
– RNC DSP resource measurement
– Transmission resource measurement
•Further power measurements
•Feature measurement
•Cell availability
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Capacity Areas in UTRAN
Essential to monitor the available resources in UTRAN
– Capacity from initial dimensioning phase may no be sufficient anymore
– Marketing campaigns lead to higher resource utilization
Capacity bottlenecks impact the call setup success rates (CSSR)
– Mobile user perceives poor setup success rates directly
– Unsatisfied customers usually seek for better performance in someother network available (churn)
With current NSN measurements network capacity can bemonitored in a proactive mode
– Traffic increase can be seen from mid or long term graphs
– Capacity upgrades can be triggered taking into account existing leadtimes HW units, internal procedures like planning or implementation
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IuB
Air Interface WBTS HW Resources Transport
UL interference
DL transmisson power
DL Codes
FSP/ WSP capacity (N*) E1 capacity / AAL2
Capacity Areas in UTRAN
RLC/MAC
During call set-up [RRC, RAB] several resource areas are checked and
physical / logical resources allocated.
DSP processing
RNC
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Resource allocation at RRC/RAB setup
AC
CAC/AAL2
NBAP
1 – Radio
resources
4 – Iub resources, treated
in later LE
2 – WBTS
resources
RM
1a – Code
resources
3 – DMCU
allocation
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Resource allocation at RAB setup
Radio Link Reconfiguration Commit
AAL2SIG:ERQ
RAB Assignment Request
Facility
Call Proceeding
Setup
UE RNC MGWNode B
RRC Connection Establishment
Radio Link Reconfigure Prepare
Radio Link Reconfigure Ready
AAL2SIG:ERQ
AAL2SIG:ECF
FP: Downlink Sync
FP: Uplink Sync
AAL2SIG:ECF
Radio Bearer Setup
Radio Bearer Setup Complete
Authentication & Security mode
1 – AC, RM
3 – DMCU
2 – WBTS
resources
4 - BTS CAC4 – RNC CAC
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RU10 Counters & KPIs
• Capacity Areas in UTRAN
– Air interface UL / DL M1000
– Code Tree in Downlink M1000
– WBTS WSP-C (FSP) baseband processing power M5001
– Transport Measurements M550 / M800
– Feature trigger analysis M1000 – DSP Resources in RNC M609
• Supporting measurements for more details
– Traffic M1002 – L3 on IuB M1005
– L3 on Iu M1003
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The counters are dependent on the RNP parameters PrxTarget [dB] andPrxOffset [dB].
If PrxNoise autotuning is allowed, you should remember this wheninterpreting measurement results.
If PrxNoise autotuning is not allowed, PrxNoise counters’ values do not
change.
HSUPA (E-DCH) loading is affecting the update of Prx load measurements
UL Power Measurements
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Fractional load
[0..1]
Load curve in UL
PrxTotal [dBm]
PrxTarget [dB]
PrxTarget [dB]+
PrxOffset [dB]
1
Noise Rise
NR [dB]
PrxNoise[dBm]
UL Load Curve
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Autotuning algorithm
The auto-tuning algorithm adjusts
the PrxNoise value, thus moving thereference point of the UL load curve
and the relevant parameters defining
the thresholds for the UL Admission
Control (see RANPAR material for
more details).
This means that all the areas can be
shifted up and down and a certain
measured value of PrxTotal may
trigger different areas during the day.
Autotuning algorithm should be on in
order to combat UL power spikes in
the admission phase.
With default values
WCEL: PrxNoise= -104dBmRNC: PrxNoiseMaxTuneAbsolute= 20dB
thus, the maximum autotuned value is -84dBm
Fractional load[0..1]
0
Load curve in UL
PrxTotal [dBm]
PrxTarget [dB]
PrxTarget [dB]+PrxOffset [dB]
1
Noise Rise NR [dB]
PrxNoise[dBm]
PrxNoise +PrxNoiseMaxTuneAbsolute
PrxNoise -PrxNoiseMaxTuneAbsolute
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Prx Total measurements
NBAP: COMMON MEASUREMENT REPORT
PrxTotal, PtxTotal, PrxNonEDPCH, PtxNonHSPA
BTS reports total UL interference (RSSI) with 0.1dB resolution
and range [-112, ...,-50] dBm:RSSI_LEV _000: RSSI < -112.0 dBm
RSSI_LEV _001: -112.0 dBm <= RSSI < -111.9 dBm
RSSI_LEV _002: -111.9 dBm <= RSSI < -111.8 dBm
RSSI_LEV _619: -50.2 dBm <= RSSI < -50.1 dBm
RSSI_LEV _620: -50.1 dBm <= RSSI < -50.0 dBm
RSSI_LEV _621: -50.0 dBm <= RSSI
These are available through M1000C320-C341
The value in dBm can be derived by:
[-112.0+ (RSSI_LEV)/10] dBm
Value mapping according 3GPP TS 25.133
NBAP-PRIVATE: RADIO RESOURCE INDICATION
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The BTS reports PrxTotal of each cell to the CRNC periodically in NBAP-
c: RADIO RESOURCE INDICATION message.
When the RRM (Radio Resource Management) in the RNC receives it, the
relevant PrxTotal counters are updated according to the defined 5 UL load
areas. The counters are already averaged values presented in dBm.
PrxTotal measurements
Sample 1 : Unloaded
Sample 2&3 : Feasible load area 1
Sample 4 : Feasible load area 2
Sample 5 : Marginal load area
Sample 6 : Overload area
X = collected sample of PrxTotal measurement
x xx
xx
x
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PrxTotal measurements
Counter
ID Counter Incremented IF M1000C0 AVE_PRXTOT_CLASS_0 (Lrt<=UnloadedRT) AND (Lnrt<=UnloadedNRT) M1000C2 AVE_PRXTOT_CLASS_1 HSUPA disabled:
(PrxTotal<=PrxTarget –PrxOffset) AND ((Lrt>UnloadedRT) OR (Lnrt>UnloadedNRT)) HSUPA enabled: (PrxNonEDPCH<=PrxTarget –PrxOffset) AND ((Lrt>UnloadedRT) OR
(Lnrt>UnloadedNRT)) M1000C4 AVE_PRXTOT_CLASS_2
HSUPA disabled:
(PrxTotal>PrxTarget –PrxOffset) AND (PrxTotal<PrxTarget) AND ((Lrt>UnloadedRT)
OR (Lnrt>UnloadedNRT)) HSUPA enabled: (PrxNonEDPCH>PrxTarget –PrxOffset) AND (PrxNonEDPCH<PrxTarget) AND
((Lrt>UnloadedRT) OR (Lnrt>UnloadedNRT)) M1000C6 AVE_PRXTOT_CLASS_3 HSUPA disabled:
(PrxTotal>=PrxTarget) AND (PrxTotal<PrxTarget+PrxOffset) AND ((Lrt>UnloadedRT)
OR (Lnrt>UnloadedNRT)) HSUPA enabled: (PrxNonEDPCH>=PrxTarget) AND (PrxNonEDPCH<PrxTarget+PrxOffset) AND
((Lrt>UnloadedRT) OR (Lnrt>UnloadedNRT)) M1000C8 AVE_PRXTOT_CLASS_4 HSUPA disabled:
(PrxTotal>=PrxTarget+PrxOffset) AND ((Lrt>UnloadedRT) OR (Lnrt>UnloadedNRT)) HSUPA enabled: (PrxNonEDPCH>=PrxTarget+PrxOffset) AND ((Lrt>UnloadedRT) OR
(Lnrt>UnloadedNRT))
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PrxTotal measurements
• Based on the criteria above, the CLASS is selected and themeasurement result (received by every radio resourceindication, typically every 200 ms) is assigned to thecorresponding counter AVE PRXTOT CLASS X.
• The corresponding PRXTOT_DENOM_X is incremented by 1.
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Prx Total measurement: Class 0
According to the criteria
above, selection of class 0 is
driven by load estimation, not
by power measurement.
Due to external and inter-cell
interference the measurementPrxTotal in Class 0 might
result to be higher than that in
the other load classes.
Class 0 is detected when own cell is considered unloaded (or very low load):
LRT UnloadedRT (2%) and LNRT UnloadedNRT (1%)
UnloadedRT and UnloadedNRT are RNC internal parameters
X = collected sample of PrxTotal measurement
U N L
O A D E D
A R E A
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Average R99 Prx KPI
dBmk DENOM PRXTOT
k DENOM PRXTOT k CLASS PRXTOT AVE
Classes All k
Classes All k
_
_
_ _
_ _ _ _ _
dBm)(inR99LoadULAvgRNC_101b
uses M1000C0 through C9, see also:
M1000C288 Maximum_Prx Total, M1000C229 Minimum_PrxTotal
This KPI may be used to identify sites which are experiencing:
high uplink traffic load
high background interference
high uplink intercell interference
problems with PrxTotal measurements
The KPI is meaningful only for cell level and on hour basis
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UL Noise Rise KPI
If autotuning algorithm is on (and RNC: PrxNoiseMaxTuneAbsolute parameter
value is set large enough to allow the variation of PrxNoise value), excludingPrxTotal in Class 0 (that is the PrxNoise) from the Ave PrxTotal KPI gives theUL Noise Rise
Load
Prx_total
100%
0 _ _ _ _ _
_ _ _ _ _
_
_ CLASS PRXTOT AVE
k DENOM PRXTOT
k DENOM PRXTOT k CLASS PRXTOT AVE
NR
Classes All k
Classes All k
Load NR
1
1
dB
Prx_noise
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Time in Class X KPI
The Time in class X KPI is the percentage of time the cell has been in class X .
This KPI can be used for:
Percentage of time in class 3-4: useful to identify cells which are approaching
the point at which there may be significant rejected capacity requests. This KPImay be use as a trigger for a capacity upgrade process (i.e. by additional carrier)
The KPI is meaningful only for cell level and on hour basis
%100 _ _
_ _
_
Classes All k
k DENOM PRXTOT
X DENOM PRXTOT
PrxTotal > PrxTarget – PrxOffset
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Cell Noise
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• In case own cell is considered unloaded (i.e. Lrt<UnloadedRT andLnrt<UnloadedNRT), the received PrxTotal value is used by the autotuningalgorithm to update the PrxNoise value.
• If HSUPA is enabled in the cell, the Watt value updated into AVE_PRXTOTcounters is the estimated Rel99 uplink power PrxNonEDPCH.
• AVE_PRX_NOISE counter is the average (over the measurement period)PrxNoise value used in UL admission control .
• It is updated in every radio resource indication period (typically 200ms). It gets theprevious value if cell load does not fulfill the unloaded conditions above. The realdBm value is obtained when divided by -100.
• PRX_NOISE_DENOM_1 counter is updated on every RRI (Radio Resource
Indication) message received.• It indicates interference when above ~ 100dBm
• The counter/KPI is meaningful only for cell level and on hour basis. Thecounter/KPI is dependent on auto tuning algorithm.
Average PrxNoise, counter and KPI
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Min and Max PrxNoise (M1000C12&13)
• MAX_PRX_NOISE_VALUE is updated if own cell is unloaded and thevalue of the counter is smaller than the current value of PrxNoise
• MIN_PRX_NOISE_VALUE is updated if own cell is unloaded and thevalue of the counter is bigger than the current value of PrxNoise.
• The real dBm value for both counters is obtained when divided by -100.
• The average amplitude of PrxNoise variation (or Average PrxNoise)can be useful to evaluate the nature of the interference, thusdiscriminate between continous/low variation interference andshort/high variation interference (e.g. when above ~5dB).
• The counter/KPI is meaningful only for cell level and on hour basis. Itis useful to detect UL power spikes.
• The counter/KPI is dependent on auto tuning algorithm.
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UL Cell Load estimations
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The received wideband channel interference power of the cell, PrxTotal,can be divided into following components:
• the received power caused by the UEs of the own cell, PrxOwn
•the received powers caused by the UEs of the surrounding cells,PrxOther
• and the system noise, PrxNoise (depending, for example, on theenvironment and the background noise)
Interference caused by own cell users can be further divided into RTand NRT components:
PrxTotal = PrxOwn + PrxOther + PrxNoise
PrxOwn = PrxRT + PrxNRT
RT and NRT received power
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RT and NRT Load Factor (1/2)
Interference caused by own cell RT users can be expressed as:
where Lrt represents the load factor of the own cell RT users.
Similarly, interference caused by own cell NRT users can be expressedas:
where Lnrt represents the load factor of the own cell NRT users.
Based on definitions, the value of Lrt (or Lnrt) is between [0&1], and Lrt+ Lnrt < 1.
PrxNRT = Lnrt * PrxTotal
PrxRT = Lrt * PrxTotal
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The values of load factors are estimates, not the direct measurements,
depending on the Eb/No, , and bit rate, R, of the active users.
RT and NRT Load Factor (2/2)
Usersactivenrt N
i
ii
nrt
R
W L
_ _ _
1 1
1
Usersactivert N
i
ii
rt
R
W L
_ _ _
1 1
1
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There are specific counters for Lrt and Lnrt for each CLASS (0 … 4).
At the same time as Radio Resource Indication message is received in theRNC, and PrxTotal value is inside CLASS X range, not only AVE PRXTOTCLASS X is updated, but also AVE_LRT_CLASS_X andAVE_LNRT_CLASS_X counters are updated (with the estimated LRT andLNRT values).
Counter values are alreadyaveraged and real % value isobtained when the counter valueis divided by 100.
LRT_DENOM_X and
LNRT_DENOM_X areincremented by 1 at the sametime as PRXTOT_DENOM_X isupdated, when Radio ResourceIndication message arrives.
Useful also to detect hanging
load.
Uplink Lrt & Lnrt estimation
X = collected sample of PrxTotal measurement
U N L O
A D E D
A R E A
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DL Power Measurements
HSDPA traffic is affecting updating of Ptx measurements
HSDPA power allocation method is affecting updating of Ptx load
counters as well
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Ptx Total measurements
• BTS reports total DL transmitted power, PtxTotal, periodically (every
200ms, if load is changing), in every Radio Resource Indication message
(at least once per 10 RRI).
• BTS reports PtxTotal as percentage value, the ratio between the total
transmitted power and the maximum transmission power. In the RNC
however, the unit of PtxTotal is 0.01*dBm.• BTS reports PtxNonHSDPA – power used for all services other than
HSDPA
PrxTotal, PtxTotal, PrxNonEDPCH, PtxNonHSPA
NBAP: COMMON MEASUREMENT REPORTNBAP-PRIVATE: RADIO RESOURCE INDICATION
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PtxTotal measurements
Ptx CCHs
The BTS reports PtxTotal of each cell to the CRNC periodically in NBAP-c: RADIORESOURCE INDICATION message / 3GPP NBAP: COMMONMEASUREMENTREPORT.
When the RRM (Radio Resource Management) in the RNC receives it, the relevantPtxTotal counters are updated according to the defined 5 DL load areas. The realdBm value is obtained when divided by -100.
Sample 1 : Unloaded
Sample 2 : Feasible load area 1
Sample 3 : Feasible load area 2
Sample 4 : Marginal load area
Sample 5 : Overload area
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HSDPA power allocation affects reporting of Ptxpower
HSDPADynamicResource-
Allocation
RNC sends the
PtxMaxHSDPA to BTS
BTS allocates the
available DL power
dynamically to
HSDPA until
PtxMaxHSDPA
Disabled
BTS allocates the
available DL power dynamically to
HSDPA until Cell max
DL power
Enabled
RNC schedules NRT DCH
according to HSDPApriority
RNC schedules NRT
DCH using dynamicNRT scheduling
HSDPA (Static)
Resource Allocation
HSDPA dynamic
Resource Allocation
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Depending
• a) HSDPA is enabled or not• b) if enabled, which power allocation method is used (static RAS05/05.1]/dynamic)
Rel99
Power
Rel5
Power
Max power
Node-B Tx power
A
Ptx_off set_HSDPA
PtxnonHSDPA
PtxNC
Ptx_target_HSDPA
B
PtxTotal
Ptx_target
C
PtxMaxHSDPA
Max power -0.8 dB margin
Max power
Node-B Tx power
A
Ptx_off set_HSDPA
PtxnonHSDPA
PtxNC
Ptx_target_HSDPA
B
PtxTotal
Ptx_target
C
PtxMaxHSDPA
Max power -0.8 dB margin
Max power
Node-B Tx power
A
Ptx_offset_HSDPA
PtxnonHSDPA
PtxNC
Ptx_target_HSDPA
B
Ptxtotal
Ptx_target
C
Ptx_offset
PtxMaxHSDPA
Max power -0.8 dB margin
Max power
Node-B Tx power
A
Ptx_offset_HSDPA
PtxnonHSDPA
PtxNC
Ptx_target_HSDPA
B
Ptxtotal
Ptx_target
C
Ptx_offset
PtxMaxHSDPA
Max power -0.8 dB margin
Static Resource allocation
HSDPA priority =1
Static Resource allocation
HSDPA priority = 2
HSDPA power allocation affects reporting of Ptxcell power
Dynamic power allocation (RU10)
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Dynamic power allocation (RU10)
BTS allocates all unused DL power up to the max cell power, if needed
• All the power available after DCH traffic, HSUPA control channels andcommon channels can be used for HSDPA
PtxMax is the cellmaximum outputpower defined by
the managementparameter PtxCellMax and theBTS capability(MaxDLPowerCapability)
PtxNC
PtxNRT
PtxHSDPA
PtxMax
PtxNonHSPA
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Dynamic NRT DCH scheduling
With no active HSDPA users:
1) NRT DCH scheduling to the
PtxTarget+PtxOffset &RT DCHadmission to PtxTarget
With active HSDPA users:
2) NRT DCH scheduling toPtxTargetPS
3) RT DCH admission to PtxTarget HSDPA activeNo HSDPA users No HSDPA users
PtxTarget
+PtxOffset
PtxMax
PtxTargetPS
PtxNC
PtxNRT
PtxHSDPA
1
2
3
PtxNonHSPA
PtxTotal
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HSPA power and Ptx_Target_PS counters
• Minimum, maximum and average value of HSPA power can be followed up by:
• M1000C236 MIN_HSPA_DL_POWER [dBm]
• M1000C237 MAX_HSPA_DL_POWER [dBm]
• M1000C238 AVE_HSPA_DL_POWER [dBm]
• M1000C239 HSPA_DL_POWER_SAMPLES (The number of samples for the
target threshold HSPA power measurement)
• Minimum, maximum and average value of Ptx_Target_PS can be followed up by:
• M1000C232 MIN_PTX_TARGET_PS [dBm]
• M1000C233 MAX_PTX_TARGET_PS [dBm]
• M1000C234 AVE_PTX_TARGET_PS [dBm]
• M1000C235 PTX_TARGET_PS_DENOM (The number of samples for the
target threshold PtxTargetPS measurement)
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PtxTotal measurements
Class Counter Incremented IF M1000C14 AVE_PTXTOT_CLASS_0 No calls allocated in the cell.
M1000C16 AVE_PTXTOT_CLASS_1 No HSDPA users in cell:
((PtxPrimaryCCPCH + PtxPrimaryCPICH) < PtxTotal) AND (PtxTotal < (PtxTarget-PtxOffset)) AND
“Cell not empty”
At least one HSDPA user in cell and static resource allocation in use: ((PtxPrimaryCCPCH + PtxPrimaryCPICH) < PtxNonHSPA) AND
(PtxNonHSPA < (PtxTargetHSDPA-PtxOffsetHSDPA))
At least one HSDPA user in cell and dynamic resource allocation in use: ((PtxPrimaryCCPCH + PtxPrimaryCPICH) < PtxNonHSPA) AND (PtxNonHSPA < (PtxTargetPS-
PtxOffset))
M1000C18 AVE_PTXTOT_CLASS_2 No HSDPA users in cell: (PtxTotal >= (PtxTarget-PtxOffset)) AND (PtxTotal < PtxTarget) AND
“Cell not empty” At least one HSDPA user in cell and static resource allocation in use:
(PtxNonHSPA >= (PtxTargetHSDPA-PtxOffsetHSDPA)) AND (PtxNonHSPA < PtxTargetHSDPA)
At least one HSDPA user in cell and dynamic resource allocation in use: (PtxNonHSPA >= (PtxTargetPS-PtxOffset)) AND (PtxNonHSPA < PtxTargetPS)
M1000C20 AVE_PTXTOT_CLASS_3 No HSDPA users in cell: (PtxTotal >= (PtxTarget)) AND (PtxTotal < PtxTarget+PtxOffset) AND “Cell not empty”
At least one HSDPA user in cell and static resource allocation in use:
(PtxNonHSPA >= PtxTargetHSDPA) AND (PtxNonHSPA < PtxTargetHSDPA+PtxOffsetHSDPA)At least one HSDPA user in cell and dynamic resource allocation in use:
(PtxNonHSPA >= PtxTargetPS) AND (PtxNonHSPA < PtxTargetPS+PtxOffset)
M1000C22 AVE_PTXTOT_CLASS_4 No HSDPA users in cell: PtxTotal > (PtxTarget+PtxOffset)
At least one HSDPA user in cell and static resource allocation in use:
(PtxNonHSPA>=(PtxTargetHSDPA+PtxOffsetHSDPA))At least one HSDPA user in cell and dynamic resource allocation in use:
(PtxNonHSPA>=(PtxTargetPS+PtxOffset))
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PtxTotal measurements
• Based on the these criteria above, the CLASS is selected
and the measurement result (received by every radioresource indication, typically every 200 ms) is assigned tothe corresponding counter AVE PTXTOT CLASS X.
• The corresponding PTXTOT_DENOM_X is incrementedby 1.
Average R99 Ptx KPI
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Average R99 Ptx KPI
The Average R99Ptx KPI is the average R99 downlink transmitted power.
This KPI may be used to identify sites which are experiencing:
need for WPA expansion
need for carriers expansion
high DL path loss/ interference (check AC failures)
distant traffic
Note that DL Power is linked to user mobility.
The KPI is meaningful only for cell level and on hour basis
dBmk DENOM PTXTOT
k DENOM PTXTOT k CLASS PTXTOT AVE
Classes All k
Classes All k
_
_
_ _ *100
_ _ _ _ _
RNC_102b
Average done in Watt!
uses M1000C14 through C23, see also:
M1000C230 Maximum_PtxTotal, M1000C231 Minimim_PtxTotal
A DL i ll
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Average DL power in a cell
Important indication for available DL power for Rel99 and HSPA
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Downlink Cell Power Online Monitoring
Measurement: Cell Resource M1000
N i t t RU10 t
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New important RU10 counters
• M1000C342-C352 for Transmitted Carrier Power in absolute units,
classification depends on cell size setting via PRACHDelayRange
Ti i Cl X KPI
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Time in Class X KPI
The Time in class X KPI is the percentage of time the cell has been in class X
.
This KPI can be used to measure the percentage of time in class 3-4, to detectcell overload problems.
It has to be reminded that Class 0 means power for DL common channels, andit has an impact on the KPI.
Nevertheless, Class 0 is not triggered if BTS is not active.
The KPI is meaningful only for cell level and on hour basis
%100 _ _
_ _
_
Classes All k
k DENOM PTXTOT
X DENOM PTXTOT
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Code Tree
Code occ panc in a cell (ma min)
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Code occupancy in a cell (max, min)
% max
min
Example from Rel99 only network
Downlink Spreading Code availability
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Downlink Spreading Code availability
DL spreading codes are used to separate user data in a cell
The code pool can run out of codes depending on:
• Rel99 services allocated
• HSDPA allocation (NxSF16 codes out of 15 max, 5 min)
Resource blocking is more combinatory rather than numeric.
Code Measurements on WCEL level
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Code Measurements on WCEL level
Following DL spreading code measurements are performed:
Code occupancy
– Ave, Min, Max usage
Code blocking – No codes available SF4, 8, 16, 32, 64, 128, 256
– Successful code allocations
Number of code requests – SF4, 8, 16, 32, 64, 128, 256
HSDPA code usage – Duration of allocation 5, 6, 7, 8, 9. 10, 11, 12, 13, 14, 15 codes of SF 16
– 1 second interval sampling
HSDPA code downgrades – Triggered by RT call request
– Triggered by NRT call request
M1000C72, M1000C74, M1000C75
M1000C76-M1000C82
M1000C83
M1000C259-M1000C265
M1000C248-M1000C258
M1000C266
M1000C267
No codes available for SF 8 & SF 16
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No codes available for SF 8 & SF 16
No Codes available SF 8, SF 16
0
20
40
60
80
100
120
140
160
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
time (hour)
n u m b
e r
no codes SF 16no codes SF 8
Measurement: Cell Resource M1000
one day data
Code Tree usage no codes available SF x
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Code Tree usage – no codes available SF x
0
200
400
600
800
1000
1200
1400
1600
1800
0 1 . 0 4 .
0 8
0 0 : 0 0
0 1 . 0 4 .
0 8
0 2 : 0 0
0 1 . 0 4 .
0 8
0 4 : 0 0
0 1 . 0 4 .
0 8
0 6 : 0 0
0 1 . 0 4 .
0 8
0 8 : 0 0
0 1 . 0 4 .
0 8
1 0 : 0 0
0 1 . 0 4 .
0 8
1 2 : 0 0
0 1 . 0 4 .
0 8
1 4 : 0 0
0 1 . 0 4 .
0 8
1 6 : 0 0
0 1 . 0 4 .
0 8
1 8 : 0 0
0 1 . 0 4 .
0 8
2 0 : 0 0
0 1 . 0 4 .
0 8
2 2 : 0 0
0 2 . 0 4 .
0 8
0 0 : 0 0
0 2 . 0 4 .
0 8
0 2 : 0 0
0 2 . 0 4 .
0 8
0 4 : 0 0
0 2 . 0 4 .
0 8
0 6 : 0 0
0 2 . 0 4 .
0 8
0 8 : 0 0
0 2 . 0 4 .
0 8
1 0 : 0 0
0 2 . 0 4 .
0 8
1 2 : 0 0
0 2 . 0 4 .
0 8
1 4 : 0 0
0 2 . 0 4 .
0 8
1 6 : 0 0
0 2 . 0 4 .
0 8
1 8 : 0 0
0 2 . 0 4 .
0 8
2 0 : 0 0
0 2 . 0 4 .
0 8
2 2 : 0 0
0 3 . 0 4 .
0 8
0 0 : 0 0
0 3 . 0 4 .
0 8
0 2 : 0 0
0 3 . 0 4 .
0 8
0 4 : 0 0
0 3 . 0 4 .
0 8
0 6 : 0 0
0 3 . 0 4 .
0 8
0 8 : 0 0
0 3 . 0 4 .
0 8
1 0 : 0 0
0 3 . 0 4 .
0 8
1 2 : 0 0
0 3 . 0 4 .
0 8
1 4 : 0 0
0 3 . 0 4 .
0 8
1 6 : 0 0
0 3 . 0 4 .
0 8
1 8 : 0 0
0 3 . 0 4 .
0 8
2 0 : 0 0
0 3 . 0 4 .
0 8
2 2 : 0 0
No Code SF4 No Code SF8 No Code SF16 No Code SF32
No Code SF64 No Code SF128 No Code SF256
Feature on Feature off Feature on
Throughput Based Optimisation of Packet Scheduler Algorithms feature
RRM Feature impact
Code Tree Occupancy KPI
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Code Tree Occupancy KPI
A single downlink scrambling code supports an OVSF (Orthogonal Variable SpreadingFactor) code tree containing 508 codes, based upon spreading factors from 4 to 256.
The Average Code Tree Occupancy KPI provides an indication of the percentage of codes which are either used or blocked by used codes.
Both counters are updated every 20 s.
The KPI is meaningful only for cell level and on hour basis
Counters for Min and Max Code Tree Occupancy already in percentage.
Max code occupancy can be used to detect busy hour.
% _CAPACITY DENOM_CODE
ITY CODE_CAPAC RNC_113a
Code Blocking KPI
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Code Blocking KPI
There are counters triggered when no codes of SF X (X=4,8,… 256) areavailable.
There is a counter incremented when the code is successfully allocated
The KPI is meaningful only for cell level and on hour basis
%100
_ _ _
_ _ _ _
_ _ _
256
4
256
4
x
x
SFx AVAILABLE CODES NO
ALLOTREE CODE SUCC NBR
SFx AVAILABLE CODES NO
Duration of SF 16 codes allocated for HSDPA
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Duration of SF 16 codes allocated for HSDPA
The following counters are available to analyze code capacity allocations for
HSDPA
M1000C248 Duration of HSDPA 5 Codes Reservation
M1000C249 Duration of HSDPA 6 Codes Reservation
M1000C250 Duration of HSDPA 7 Codes Reservation
M1000C251 Duration of HSDPA 8 Codes Reservation
M1000C252 Duration of HSDPA 9 Codes Reservation
M1000C253 Duration of HSDPA 10 Codes Reservation
M1000C254 Duration of HSDPA 11 Codes Reservation
M1000C255 Duration of HSDPA 12 Codes Reservation
M1000C256 Duration of HSDPA 13 Codes Reservation
M1000C257 Duration of HSDPA 14 Codes Reservation
M1000C258 Duration of HSDPA 15 Codes Reservation
1 second sampling interval
NBAP: Physical Shared channel reconfiguration
NBAP: Physical Shared channel reconfiguration Resp
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WBTS Baseband Resources
Counters
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Counters
M5001 WBTS Baseband processing
M1005 L3 on IuB
M1005C0 : RL_STP_ATT_FOR_FIRST_RL
M1005C5 : RL_STP_SUCC_FOR_FIRST_RL
M1005C179: SETUP_FAIL_FIRST_RL_MISC
_CE MAX_AVAIL M5001C0
_CE MIN_AVAIL M5001C1
CE AVE_AVAIL_ M5001C2
E_DL MAX_USED_C M5001C3
CE_UL MAX_USED_ M5001C4
E_DL MIN_USED_C M5001C5
CE_UL MIN_USED_ M5001C6
E_DL AVG_USED_C M5001C7
E_UL AVG_USED_C M5001C8
WBTS BB Capacity (Absolute # of CE) avg values
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WBTS BB Capacity (Absolute # of CE) avg values
Measurement: M5001 WBTS HW Resources
WBTS BB Capacity (Absolute # of CE) max values
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WBTS BB Capacity (Absolute # of CE) max values
Measurement: M5001 WBTS HW Resources
WBTS BB Capacity (Traffic Mix Analysis)
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WBTS BB Capacity (Traffic Mix Analysis)
Measurement: M1000 WBTS HW Resources
Analyzing the service traffic mix which is supported by WBTS Base Band
Radio Link Setup fail due to WBTS BB Resources
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Radio Link Setup fail due to WBTS BB Resources
Processing power limitation starts here
Please note: NSN Nokia WBTS maps WSP shortage to failure cause “MISC”
L3 IuB measurements indicate resource blocking in WBTS baseband
M1005 Layer 3 on IuB interface
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Measuring DSP resources in RNC
DSP Processing Resources in RNC
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DSP Processing Resources in RNC
Like WBTS, RNC allocates DSP resources to support calls.
DMCU-0
DMPG-1
DMPG-2
DMPG-0
DSP-0
DSP-7
DMPG-3
RNC Block Diagram
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RNC Block Diagram
CentralizedSPRM sw
Distributed
SPRM sw
not present in RNC2600
DSP Resource Measurements in RU10
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DSP Resource Measurements in RU10
The M613 measurements are no longer available in RU10
release• The M613 table is replaced with tables :
– M609 DSP Service Statistics Measurement and
– M615 DSP Resource Utilisation Measurements
• Additionally there are two new tables : – M612 DSP State Change Measurements and
– M617 DSP Load Measurements
M609Service Type
M615DSP Pool
M617DMPG level
M609 DSP Service Statistics Measurement
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M609 DSP Service Statistics Measurement
The DSP service statistics measurement provides information
on the resource allocation for each DSP service type• This measurement can be used, for example, to evaluate the
number of simultaneous HSDPA users in RNC level
The object of the measurement is one of the DSP service
names presented in table in the next slide (i.e. DSP reservationstatistics are shown for each service type separately)
M609 DSP Service Statistics Measurement
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M609 DSP Service Statistics MeasurementService name Description
AMR Real time speech service.
CCH Common channel service.
HSCCH HSDPA common channel service.
ALLHSDPA Sum of all HSDPA services. Includes both HSDPA NRT and HSDPA RT. HSUPA call does not update counters for this object even if it usesHSDPA in downlink.
HSDPA_NR HSDPA NRT service. HSUPA call does not update counters for this object even if it uses HSDPA in downlink.
HSDPA_RT HSDPA RT service. HSUPA call does not update counters for this object even if it uses HSDPA in downlink.
HS_16_H HSDPA 16 kbps uplink return channel, high HS-DSCH peak rate.
HS_16_L HSDPA 16 kbps uplink return channel, low HS-DSCH peak rate.
HS_64_H HSDPA 64 kbps uplink return channel, high HS-DSCH peak rate.
HS_64_L HSDPA 64 kbps uplink return channel, low HS-DSCH peak rate.
HS_128_H HSDPA 128 kbps uplink return channel, high HS-DSCH peak rate.
HS_128_L HSDPA 128 kbps uplink return channel, low HS-DSCH peak rate.
HS_384_H HSDPA 384 kbps uplink return channel, high HS-DSCH peak rate.
HS_384_L HSDPA 384 kbps uplink return channel, low HS-DSCH peak rate.
HSPASWI HSUPA and HSDPA service used temporarily during channel type switching. Includes both NRT and RT.
ALLHSUPA Sum of all HSUPA services. Includes both HSUPA NRT and HSUPA RT.
HSUPA_NR HSUPA NRT service
HSUPA_RT HSUPA RT service
IPIUAMR IP based Iu interface real time speech service.
IPIURTCS IP based Iu interface real time circuit switched data service.
NRTPSR99 Rel99 non real time packet switched data service. Does not include HSDPA uplink return channel.
RTCSDATA Real time circuit switched data service.
RTHSDPA HSDPA real time packet switched data service. HSUPA call does not update counters for this object even if it uses HSDPA in downlink.
RTHSPASW Real-time HSUPA and HSDPA service used temporarily during channel type switching.
RTPSR99 Rel99 real time packed switched data service. Does not include HSDPA uplink return channel.
SL Signalling link service.
M609 DSP Service Statistics Measurement
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M609 DSP Service Statistics Measurement
M609C0 DSP_SERVICE_CURR_RES_ALLOC
• The current number of resources allocated for a specific DSP service type
• Counter incremented at the end of the measurement period
M609C1 DSP_SERVICE_PEAK_RES_ALLOC
• The peak number of resources allocated for a specific DSP service type
• Counter incremented at the end of the measurement period with the peak value
M609C2 DSP_SERVICE_SUCC_RES_ALLOC
• The total cumulative number of the resources allocated for a specific DSP servicetype
• Counter is updated when the DSP resource is successfully allocated
M609C3 DSP_SERVICE_FAIL_RES_ALLOC
• The number of DSP resource allocation failures
• Counter is updated when the DSP resource allocation failsM609C4 DSP_SERVICE_FAIL_RES_MODIFY
• The number of DSP resource modification failures
• Counter is updated when the DSP resource modification fails
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AAL2 Transport Resources
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Time /sec
traffic rate [cells/sec.]
Configured PCR of VCC
VCC load estimated by CAC
Shared HSDPA AAL2 allocation size
= sampled values
1 23
Real traffic load of ATM VCC
AAL2 Path Related Counters (M550)
Each sample for the total reserved capacity (blue line in figure) is summed together for the whole measurementperiod. The result is show in counters:
• SUM_RESERVED_CELL_RATE (M550C1)
• NBR_SAMPLES (M550C7)
The same is done for the shared HSDPA allocation size (grey line in figure) and the related counter is:
• SHARED_HSDPA_AAL2_ALLOCATION (M550C16)
1
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Time /sec
traffic rate [cells/sec.]
Configured PCR of VCC
VCC load estimated by CAC
Shared HSDPA AAL2 allocation size
= sampled values
1 23
Real traffic load of ATM VCC
The peak and minimum sampled values for measurement period update the following counters:
MIN_RESERVED_CELL_RATE (M550C2)
MAX_RESERVED_CELL_RATE (M550C3)
2
AAL2 Path Related Counters (M550)
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Time /sec
traffic rate [cells/sec.]
Configured PCR of VCC
VCC load estimated by CAC
Shared HSDPA AAL2 allocation size
= sampled values
1 23
Real traffic load of ATM VCC
The peak cell rate of AAL2 path is given as a reference in counter:
AAL2_PATH_GUAR_CELL_RATE (M550C0)
3
AAL2 Path Related Counters (M550)
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M550 Examples
M550 – CAC AAL2 Path Measurements
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M550 CAC AAL2 Path Measurements2 VCs with 8250 cells per second per VC on 1 IMA group
max
min
M550 measurement to track allocation of AAL2 bandwidth in a VC c
M550 Path CAC (1 IMA Group, 2 VCs)
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( p, )
Measurement: M550 User Plane CAC Path
Reserved Bandwidth
Free Bandwidth
Configured Bandwidth
M550 CAC Path Measurements (IuR interface, 1VC)
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( , )
M550 AAL2 Path CAC Resource Measurements
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M550 Counters (AAL2 Connections allocation) :
• M550C4 SUM_AAL2_CONNECTIONS
• M550C5 MIN_AAL2_CONNECTIONS
• M550C6 MAX_AAL2_CONNECTIONS
• M550C11 SUM_AAL2_CONNECTIONS_HSDPA
• M550C12 MIN_AAL2_CONNECTION_HSDPA• M550C13 MAX_AAL2_CONNECTIONS_HSDPA
• M550C7 NBR_SAMPLES (per measurement interval)
Numer of Channel Ids required
on IuB interface for specific service
Service Type NBR of CIds
RRC 1
AMR, Video call,
NRT Packet Call
(Rel99)
2
HSDPA,
HSPA call
3
M550 – CAC AAL2 Path Measurements (Channel Ids)
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2 VCs on 1 IMA group
Less than 248 Channel Identifiers used in each VC
(Rel99 call needs 2 CIds, HSDPA call needs 3 CIds on IuB interface)
M550 measurement to track allocation of AAL2 Channel Ids in a VC
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M1000 power counters not directly related tocapacity
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In Uplink:
• load estimation, Lrt&Lnrt, allows better understanding of the loadingstatus of a cell than power measurements since there’s no dependencyon PrxNoise level
• load measurements are more appropriate for Busy Hours detection
In Downlink:
• power measurements provide proper indication of cell load
• however, PtxRT&NRT measurements allow distinction of RT and NRTtraffic
• both power measurements might be used for Busy Hours detection
DL Radio Link Power Measurements, RT & NRT
Ptx RT & Ptx NRT calculation
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BTS periodically (typically every 500ms) reports the transmittedpower, P tx_average , per every radio link by using a dedicated NBAP-d /RADIO LINK MEASUREMENT REPORT-message.
RNC (AC/PS) is able to identify to service (RT or NRT, or multi) thePtx_average values belongs.
Ptx_RT & Ptx_NRT calculation
NBAP-D: DEDICATED MEASUREMENTREPORT
PtxAverage
Value mapping for DL code power measurements
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Value mapping according 3GPP TS 25.133
CRNC-CC-IDs-InformationItem-RL-
MeasurementsReport
- extension flag: 0
- preamble: 0
- cRNC-CommunicationContextID: 1462
- length (in bits): 01
- padding: 0000
- contents: 05 B6
reported-RL-Information-RL-Meas-Rep
- length (in bits): 00000
Reported-RL-InformationItem-RL-Meas-Rep- extension flag: 0
- preamble: 00
- rL-ID: 1
- contents (in bits): 00001
measurement-1-Avail-Ind
- extension flag: 0
- choice index: 0
measurement-Available
- extension flag: 0
- average-DL-TransmittedPower: 50
NetHawk IuB log
New important RU10 counters
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• M1000C353-C362 for Transmitted Code Power in absolute units,classification depends on cell size setting via PRACHDelayRange
Classification example: Code power
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Counter # Counter name/Class PRACHDelayRangesetting (5 km range):
PRACHDelayRang
e setting (10 kmrange):
PRACHDelayRange
setting (20 kmrange):
PRACHDelayRange
setting (60 kmrange):
PRACHDelayRange
setting (180 kmrange):
M1000C353 TX_CODE_PWR_CLASS_
0
0<=TxCdPwr<5dBm 0<=TxCdPwr<5 0<=TxCdPwr<5 0<=TxCdPwr<5 0<=TxCdPwr<6
M1000C354 TX_CODE_PWR_CLASS_ 1
5<=TxCdPwr<10dBm 5<=TxCdPwr<10 5<=TxCdPwr<10 5<=TxCdPwr<10 6<=TxCdPwr<12
M1000C355 TX_CODE_PWR_CLASS_ 2
10<=TxCdPwr<15dBm 10<=TxCdPwr<15 10<=TxCdPwr<15 10<=TxCdPwr<15 12<=TxCdPwr<17
M1000C356 TX_CODE_PWR_CLASS_ 3
15<=TxCdPwr<19dBm 15<=TxCdPwr<19 15<=TxCdPwr<20 15<=TxCdPwr<20 17<=TxCdPwr<22
M1000C357 TX_CODE_PWR_CLASS_ 4
19<=TxCdPwr<23dBm 19<=TxCdPwr<23 20<=TxCdPwr<24 20<=TxCdPwr<25 22<=TxCdPwr<27
M1000C358 TX_CODE_PWR_CLASS_ 5
23<=TxCdPwr<27dBm 23<=TxCdPwr<27 24<=TxCdPwr<28 25<=TxCdPwr<30 27<=TxCdPwr<32
M1000C359 TX_CODE_PWR_CLASS_ 6
27<=TxCdPwr<30dBm 27<=TxCdPwr<31 28<=TxCdPwr<32 30<=TxCdPwr<34 32<=TxCdPwr<36
M1000C360 TX_CODE_PWR_CLASS_ 7
30<=TxCdPwr<33dBm 31<=TxCdPwr<35 32<=TxCdPwr<36 34<=TxCdPwr<38 36<=TxCdPwr<40
M1000C361 TX_CODE_PWR_CLASS_ 8
33<=TxCdPwr<36dBm 35<=TxCdPwr<38 36<=TxCdPwr<40 38<=TxCdPwr<42 40<=TxCdPwr<44
M1000C362 TX_CODE_PWR_CLASS_ 9
36<=TxCdPwr 38<=TxCdPwr 40<=TxCdPwr 42<=TxCdPwr 44<=TxCdPwr
Ptx RT & Ptx NRT measurements
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Ptx_RT & Ptx_NRT measurements
The counter for specific CLASS is updated at the same time as AVE PTXTOT
CLASS X counter i.e. when Radio Resource Indication message arrivesWhen the PtxTotal value is inside CLASS X range, the AVE_PTXRT_CLASS_X and AVE_PTXNRT_CLASS_X counters are updated with the estimated PTX RTand NRT values
This counter is a sum over a measurement period divided by a denominator, andit is an average value.
Real dBm value is obtained when divided by 100
Ptx CCHs
PTXRT_DENOM_X and
PTXNRT_DENOM_X are
incremented by 1 at the same time
as PTXTOT_DENOM_X is updated,
when Radio Resource Indication
message arrives.
The KPI is meaningful only for celllevel and on hour basis
Average DL Power for RT and NRT KPIs
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dBm
i
i
4
0OM_iPTX_RT_DEN
4
0OM_iPTX_RT_DEN _CLASS_iAVE_PTX_RT
_RT AVE_DL_PTX
dBm
i
i
4
0 NOM_iPTX_NRT_DE
4
0 NOM_iPTX_NRT_DET_CLASS_iAVE_PTX_NR
_NRT AVE_DL_PTX
The KPI is meaningful only for cell level and on hour basis
Average done in Watt!
Average done in Watt!
Load Based AMR Codec Mode Selection M1000
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Load Based AMR Codec Mode Selection M1000
Threee different Load thresholds monitored by RNC on 10s intervals : Tx Power (e.g. Non Controllable Tx
Power) usage, DL Channelisation Code usage and Iub transmission capacity
Parameters below define 3 thresholds (under load, target load and over load) which are also used to
increment different counters as on next slide:
WCEL: AMRUnderTxNC, AMRUnderSC, AMRUnderTransmission
WCEL: AMRTargetTxNC, AMRTargetSC, AMRTargetTransmission
WCEL: AMROverTxNC, AMROverSC, AMROverTransmission
Load
Maximum load
Overload threshold
Target threshold
Underload threshold
If at least one load indicator exceeds its
own overload threshold, then the AMRcodec mode set {12.2, 7.95, 5.9, 4.75} is
downgraded to the mode set {5.9, 4.75}
If at least one load indicator exceeds its
own overload threshold, then the AMRcodec mode set {12.2, 7.95, 5.9, 4.75} is
downgraded to the mode set {5.9, 4.75}
If no load indicator exceeds the underload
threshold, then the AMR codec mode set
{5.9, 4.75} is upgraded to the mode set
{12.2, 7.95, 5.9, 4.75}
If no load indicator exceeds the underload
threshold, then the AMR codec mode set
{5.9, 4.75} is upgraded to the mode set
{12.2, 7.95, 5.9, 4.75}
New calls use low codec modesNew calls use low codec modes
New calls use high codec modesNew calls use high codec modes
Counters for Load Based AMR Codec Mode Selection
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Load
Maximum load
Overload threshold
Target threshold
Underload threshold
M1000C289 AMR_TXPOW_LOAD_BELOW_TARGETThe number of times when (TxPower) < (target load threshold, AMRTargetTxNC)
M1000C290 AMR_TXPOW_LOAD_OVER_TARGETThe number of times when (TxPower) >= (target load threshold, AMRTargetTxNC)
M1000C291 AMR_TXPOW_LOAD_OVERLOADThe number of times when (TxPower) >= (over load threshold, AMROverTxNC)
M1000C288AMR_TXPOW_LOAD_UNDERLOADThe number of times when (TxPower) < (under load threshold, AMRUnderTxNC)
• Same set of counters exists for Code and transmission resources:
• Code: M1000C292-295
• Transmission: M1000C296-299
• M1002C561-C562 count LC proposals to use lower codec on
SF128/256
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Measuring Radio Resource Management Features
Load Based AMR Codec Mode Selection M1002
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• M1002C563-567 provide measurements for up/downgrade successes and
failures
• Triggered only in the cell that triggered the changeUE Node B RNC
NBAP: RL Reconfiguration Prepare
BRM/UER proposes AMR bit rate change
ALCAP:ERQ
NBAP: RL Reconfiguration Ready
ALCAP:ECF
NBAP: Radio Link Reconfiguration Commit
[DCH] RRC: Transport Channel Reconfiguration
Complete
MGW
[DCH] RRC: Transport Channel Reconfiguration
Rate Control
Rate Control ACK
M1002 counters
triggered here
Tracking RRM Features
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Counters per RRM Feature available to check the performance
• Radio Bearer downgrades
– due to Throughput based Optimisation feature
– due to Pre-Emption
• Radio Bearer releases – due to Throughput based Optimisation feature
– due to Pre-Emption
• Overload Control – Transport Format Combination Control (TFCC)
• Dynamic Link Optmisation (DyLO)
Radio Bearer downgrade causes
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RB downgrade causes
0
50
100
150
200
250
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23
time (hours on 23.01.2008)
n u
m b e r
DyLO TFCC Pre-Emp_BTS_BB
Matching RL setup failure rate
Radio Bearer downgrade / release (Counters)
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M1000C150 Radio Bearer downgrade by Pre-Empt ion due to AAL2 congestion
M1000C151 Radio Bearer downgrade by Pre-Emption due to WBTS congestion
M1000C152 Radio Bearer downgrade by Pre-Empt ion due to Interference congestion
M1000C153 Radio Bearer downgrade by Pre-Empt ion due to Spreading Code congestion
M1000C142 Radio Bearer downgrade by Enhanced Overload Cont rol using TFCsubset
M1000C154 Radio Bearer downgrade by Enhanced Overload Control using RL reconfigurations
M1000C162 Radio Bearer release by Pre-Empt ion due to AAL2 congestion
M1000C163 Radio Bearer release by Pre-Empt ion due to WBTS congestionM1000C164 Radio Bearer release by Pre-Empt ion due to Interference congestion
M1000C165 Radio Bearer release by Pre-Empt ion due to Spreading Code congestion
UTRAN Capacity Resource constraints
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The following UTRAN capacity resource constraints can trigger specific features tocope with overload
• Downlink power
• Uplink interference
• Downlink spreading code
• BTS HW (WSP)
• Iub AAL2 transmission
Priority based Scheduling and overload control feature counters:M1000C145 Radio Bearer dow ngrade by PBS due to AAL2 congest ion
M1000C146 Radio Bearer donw grade by PBS due to WBTS congest ion
M1000C147 Radio Bearer dow ngrade by PBS due to interference congestion
M1000C148 Radio Bearer dow ngrade by PBS due to Spreading Code congestion
M1000C142 Radio Bearer downgrade by Enhanced Overload Cont rol using TFCsubset
M1000C154 Radio Bearer dow ngrade by Enhanced Overload Control using RL reconfigurations
M1000C157 Radio Bearer release by PBS due t o AAL2 congest ion
M1000C158 Radio Bearer release by PBS due t o WBTS congest ion
M1000C159 Radio Bearer release by PBS due t o Interference congest ion
M1000C160 Radio Bearer release by PBS due t o Spreading Code congestion
Modification of user bitrates with RL Reconfiguration
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NBAP: Radio Link Reconfiguration Prepare
NBAP: Radio Link Reconfiguration Ready
NBAP: Radio Link Reconfiguration Commit
AAL2 resource change req
AAL2 resource change resp
RRC: Radio Bearer Reconfiguration
RRC: Radio Bearer Reconfiguration Complete
DCH downgrade
AAL2 CAC
M1005C133 RL RECONF SYNCH FOR DCH MOD DUE TO DYN LINK OPT ON SRNC
M1005C142 RL RECONF SYNCH FOR DCH MOD ON SRNC DUE TO CM
M1005C153 RL RECONF PREP SYNCH FOR DCH DEL DUE TO PRIORITY BASED SCHEDULING
M1005C154 RL RECONF PREP SYNCH FOR DCH DELETION DUE TO PRE-EMPTIONM1005C156 RL RECONF PREP SYNCH FOR DCH DEL DUE ENHANCED OVERLOAD CONTROL
M1005C158 RL RECONF PREP SYNCH FOR DCH MOD DUE PBSDOWNGRADINGM1005C159 RL RECONF PREP SYNCH FOR DCH MOD DUE PRE-EMPTION DOWNGRADING
M1005C239 RL RECONF PREP SYNCH FOR DCH MOD DUE THROUGHPUT BASED OPTIMISATION
M1005C240 RL RECONF PREP SYNCH FOR DCH DEL DUE THROUGHPUT BASED OPTIMISATION
Feature trigger
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Cell Availability
Cell Availability
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M1000C178 AVAILABILITY WCELL IN WORKING STATE
• # of samples when WCELL is in WO State. Counter M1000C180 is always updated along with this counter
• Counter is updated with the value 1 once in approx. 5 seconds when the WCELL is in WO State
M1000C180 AVAILABILITY WCELL EXIST IN RNW DATABASE
• # of samples when WCELL is configured in the database. This counter is used as a denominator for cell availability calculation
• Counter is updated with the value 1 one in approx. 5 seconds when the WCELL is configured in the radio network database
It is important to make sure that cells within the cluster are in normalworking order. Missing cells may have negative impact to the analysisprocess and optimisation decisions
Prior to RAS51, Cell availability counters was based on monitoring theCode tree. From RAS51 onwards, the Cell Availability counters are basedon availability of the WCELs under a Controlling RNC.
RNC_183c Cell Availability KPI counts Cell availability from user point of
view
DB RNW IN EXIST WCELL AVAIL sum
STATE WO IN WCELL AVAIL sumty AvailabiliCell
_ _ _ _ _
_ _ _ _ *100 _
Cell Availability
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There is also Optional Cell availability KPI (RAN5.1), which counts Cell Availability from network point of view. Situation where WCELL is blockedby User are excluded from the formula.
RNC_727a Cell Availability, excluding blocked by user state (BLU) KPICounts Cell availability from network point of view
USER BY BLOCKEDWCELL AVAIL DB RNW IN EXIST WCELL AVAIL sum
STATE WO IN WCELL AVAIL sum
_ _ _ _ _ _ _ _ _
_ _ _ _ *100U_statecluding_BLability_exCell_Avail
M1000C179 AVAILABILITY WCELL BLOCKED BY USER
• # of samples when WCELL is BLU State. Counter M1000C180 is always updated along with this counter
• Counter is updated with the value 1 once in approx. 5 seconds when the WCELL is in BLU state
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Thank You !