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Transcript of ALu seminar RX ACCH
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B11 MR1 Ed1.x / Ed2.xSeminar of GSM Network EngineeringRepeated ACCH
Jorge S. Silva, Philip Fawzy, Robin Brassac
March, 2010
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Agenda
1. Feature Overview
Introduction
Repeated DL FACCH
Repeated UL SACCH
Expected Gains and Limitations
2. Activation Strategy
Pre-requisites
Parameter settings
3. Feature Assessment
Theoretical gains
Impact of other features on performance
New Counter and Indicators
Monitoring method
FOA tests results
4. Conclusion
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1 Feature Overview
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1.1 Feature OverviewIntroduction
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Feature Overview
Introduction
Feature objectives
Close performance gap between AMR speech codecs and signaling channels
When AMR speech codecs were introduced, the same ACCH (Associated ControlChannels) as those used for legacy codecs were re-used:
SACCH (Slow Associated Control Channel), which is used for non-urgentprocedures (mainly for the transmission of the radio measurement dataneeded for handover decisions, power control, TA calculation),
FACCH (Fast Associated Control Channel), which is involved in delay
sensitive mechanisms such as handover. Therefore, in poor radio conditions, the more protected AMR speech codecs have
now better performance than the associated control channels and the end-user
who would have hang-up with legacy codec does not do so anymore.
Consequently, upon AMR activation in B9, we generally see CDR increase with
following causes:
Radio link failure
HO failure (timer expiry)
Enable operators to realize the full capacity gains that the lower modes of
the AMR can provide.
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Feature description
Repeated ACCH consists of two features:
Repeated Downlink FACCH (RDFACCH)
Repeated SACCH (RSACCH)
Required by several operators:
SFR, T-Mobile, Orange.
Feature Overview
Introduction
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Feature description
Standardized in 3GPP Release 6:
MS capability indicated by the Repeated ACCH flag in classmark 3 message (1 bit
field):
0 The mobile station does not support Repeated SACCH
1 The mobile station supports Repeated SACCH and Repeated DownlinkFACCH
Support mandatory for Release 6 MS,
Some pre-release 6 MS may have the Repeated ACCHflag at 1, in thiscase they shall support completely the feature (RDFACCH and RSACCH).
Activated on a per-call basis.
Feature Overview
Introduction
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1.2 Feature OverviewRepeated DL FACCH
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Feature Overview
Repeated DL FACCH
RDFACCH operation principles 3GPP standard
The feature was designed to be compatible with legacy MS for LAPDm
command frames.
Criteria to activate RDFACCH is implementation dependent.
The operations of RDFACCH are transparent to upper layers.
Involved protocol stacks (in blue):
3GPP TS 44.006LAPDm LAPDm
Physical Layer Physical Layer
Physical connection
BTS MS
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RDFACCH operation principles 3GPP standard
BTS side (LAPDm entity)
When RDFACCH is active, each LAPDm frame is repeated twice by BTSentity.
The duplicated LAPDm frame is inserted in a FACCH frame that starts
~40ms after the FACCH frame conveying the original one.
In case of TCH/FR a speech frame is inserted
The transmission of the copy has higher priority than any new signaling
message.
I.e. if a new LAPDm message is generated between the emission of a
previous LAPDm frame and its copy, its emission is delayed.
Feature Overview
Repeated DL FACCH
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RDFACCH operation principles 3GPP standard
Delay between original FACCH and its repetition
TCH/FR case: Original FACCH frame and copy spaced by 8 or 9 (in case they are separated by an
idle frame or a SACCH period) TDMA frames.OddEven
~40 ms
Half FACCH burst of the first transmission
Half FACCH burst of the repetition
Half TCH/FR burst
Half idle or SACCH burst
OddEven
~40 ms
Half FACCH burst of the first transmission
Half FACCH burst of the repetition
Half TCH/FR burst
Half FACCH burst of another signalling message
Half FACCH burst of the repetition of another signalling message
1 radio TS
Top: first half (before the training sequence),
Bottom: second half (after the training
sequence).
1 radio
TCH
Feature Overview
Repeated DL FACCH
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RDFACCH operation principles 3GPP standard
Delay between original FACCH and its repetition
TCH/HR case: Original FACCH frame and copy spaced by 8 or 9 (in case they are separated by a
SACCH period) TDMA frames.
OddEven
~40 ms
Half FACCH burst of the first transmission
Half FACCH burst of the repetition
Half TCH/HR burst
Feature Overview
Repeated DL FACCH
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RDFACCH operation principles 3GPP standard
MS side (Physical layer)
The MS shall, when receiving a downlink FACCH block, always attempt todecode it without combining with any previously received FACCH block.
If it is successfully decoded and an identical FACCH block was previously
received, the MS shall not send the LAPDm frame of the current FACCH
block to the LAPDm entity.
If it is successfully decoded and there was no such previously received
identical FACCH block, the LAPDm frame of the current FACCH block is sent
to the LAPDm entity.
If it is unsuccessfully decoded and the previous FACCH block received was
unsuccessfully decoded, a new decoding using the information from both
these FACCH blocks shall be performed. If this decoding is successful the
LAPDm frame produced by the new decoding is sent to the LAPDm entity.
Feature Overview
Repeated DL FACCH
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BTSPhysical LAPDm
OK
OK
Msg A
Msg A
OK
Msg B
Msg B
NOK
NOK
Msg C
Msg C
OK
NOK
OK
Msg D
Msg D
decoding
MS
Soft combining
Assumption: RDFACCHdynamically activated
Feature Overview
Repeated DL FACCH
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BTSPhysical LAPDm
NOK
Msg E
Msg E
NOK
NOK
Msg F
Msg F
NOK
decoding
MS
Soft combining
Feature Overview
Repeated DL FACCH
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RDFACCH operation principles ALU implementation
Only AMR calls are concerned with the feature
Criteria to dynamically activate RDFACCH: RDFACCH allowed for this call AND AMR DL codec requested is configured
threshold
Simple, Fast, autonomously managed by BTS
RDFACCH application dependent upon Codec Mode Adaptation behavior
Every 480 ms, the BTS checks the last Codec Mode Request (CMR) used and decides
whether RDFACCH shall be activate or not.
NB: Codec Mode Request (CMR) is sent every 2 speech frames (i.e. every 40 ms) in
UL by MS to TC. It is the input to the Codec Mode Adaptation in DL indeed, it
specifies the codec recommended in DL, based on standardized C/I computations. When RDFACCH is dynamically activated, T200 timers (T200_TF and
T200_TH) in the BTS are increased by 40 ms.
Feature Overview
Repeated DL FACCH
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RDFACCH dynamic activation in ALU implementation
Example with AMR-FR, 4-codec subset (AMR_FR_SUBSET) and
Codec mode 2 REP_DL_FACCH_THRES_AMR_FR < Codec mode 3
Codec
Mode 2 +
RDFACCH
CodecMode 3
Codec
Mode 4
Codec
Mode 3
Codec
Mode 2 +RDFACCH
CodecMode 1 +
RDFACCH
Codec
Mode 1 +
RDFACCH
AMR_FR
_THR
_3+AMR
_FR_
HYST
AMR_FR_TH
R_3
AMR_FR
_THR_
2+AMR_
FR_HYST
AMR_F
R_TH
R_2
AMR
_FR_TH
R_1+
AMR
_FR_HY
ST
AMR_FR
_THR
_1
RDFACCH active
RDFACCH inactive
AMR C/I
More robust
Better intrinsicvoice quality
Feature Overview
Repeated DL FACCH
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1.3 Feature OverviewRepeated SACCH
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Feature Overview
Repeated SACCH
RSACCH operation principles 3GPP standard
Applies only to SAPI 0 frames
SAPI 3 frames are already acknowledged
(SACCH frames with SAPI 3 frames are used to carry SMS while in dedicated mode).
Both DL and UL signaling links can be strengthened using repetition
mechanism
SACCH Repetition Order (SRO) field defined in L1 header of DL SACCH frames
SACCH Repetition Request (SRR) field defined in L1 header of UL SACCH frames
SRO and SRR are a 1 bit field coded as follow:
0: Repeated SACCH not required
1: Repeated SACCH required
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Repeated DL SACCH operation principles 3GPP standard
MS side
The MS shall first attempt to decode any DL SACCH block received withoutcombining with previously received SACCH.
If it is correctly decoded, the MS shall set the SRR to Not required in
the next UL SACCH block (which is not a repetition).
If it is incorrectly decoded, then:
The MS shall set the SRR to Required in the next UL SACCH block (which is not
a repetition).
It shall try decoding using soft combining with the previously received DL SACCH
block.
Feature Overview
Repeated DL SACCH 3GPP Standard
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Repeated DL SACCH operation principles 3GPP standard
BSS side
The BSS may, based on the value of the last correctly received SRR fromthe MS, and based on implementation-dependent criteria, repeat SACCH
block at the next SACCH period.
If a SAPI 3 frame was also scheduled to be sent at this next SACCH period,
the BSS may delay the sending of the SAPI 3 frame by one SACCH period inorder to make room for the repetition.
Feature Overview
Repeated DL SACCH 3GPP Standard
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Repeated UL SACCH operation principles 3GPP standard
BSS side
The BSS shall first attempt to decode any UL SACCH block received withoutcombining with previously received SACCH block.
If decoding fails, it may try decoding using soft combining with previous SACCH
block received.
The BSS may set the value of the SRO in any DL SACCH block based onimplementation-dependent criteria.
MS side
If in the last DL SACCH block, SRO was set to Required, the MS must
repeat this block in the next SACCH period.
Feature Overview
Repeated UL SACCH 3GPP Standard
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RSACCH operation principles ALU implementation
RDSACCH and RUSACCH are activated independently during a call.
RDSACCH dynamic activation:
Disabled at call start
Activated when
RSACCH allowed for this call AND BS Radio Link Counter (RLC) configured threshold
RadioLink_Rep_DL_SACCH
OR
at least Rep_DL_SACCH_Thres SACCH frames with SRR = 1 were received in the
sliding window Rep_DL_SACCH_WS
While the feature is activated, all DL SACCH frames with SAPI = 0 are repeated once,independently of DL SACCHs being well decode or not at MS
Feature Overview
Repeated DL SACCH ALU Implementation
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RSACCH operation principles ALU implementation
RDSACCH dynamic activation:
Deactivated when
BS Radio link Counter configured threshold (RadioLink_Rep_DL_SACCH) ]
And
less than Rep_DL_SACCH_Thres SACCH frames with SRR = 1 were received in the
sliding window Rep_DL_SACCH_WS
Feature Overview
Repeated DL SACCH ALU Implementation
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RSACCH operation principles ALU implementation
RUSACCH dynamic activation (1/2):
Disabled at call start
Activated when:
At least Rep_UL_SACCH_Thres incorrect SACCH frames before combining, were
received in the sliding window Rep_UL_SACCH_WS
While the feature is activated at BTS side and SRO field in DL SACCH is equal to one andwell decoded at the MS, MS repeats previous UL SACCH frame with SAPI = 0,
independently of previous UL SACCHs being well decoded or not at BTS.
BTS must set SRO to one in each DL SACCH as long as feature is activated, so that MS isordered to repeat UL SACCH frames once.
However if SRO was not well decoded, the MS action will be mobile supplier dependent as
this is not standardized.
Feature Overview
Repeated UL SACCH ALU Implementation
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RSACCH operation principles ALU implementation
RUSACCH dynamic activation (2/2):
Deactivated when
Less than Rep_UL_SACCH_Thres incorrect SACCH frames before combining, were
received in the sliding window Rep_UL_SACCH_WS
Feature Overview
Repeated UL SACCH ALU Implementation
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RSACCH operation principles illustrations
Next slides show several graphical examples of RSACCH activation
1. Degradation in DL and RDSACCH dynamic activation based on SRR
2. Degradation in UL and RUSACCH dynamic activation based on bad frames indications
(BFI) and SRO
Assumptions
All SACCH frames are with SAPI = 0
Rep_DL_SACCH_WS = 10, Rep_DL_SACCH_Thres = 3
Rep_UL_SACCH_WS = 10, Rep_UL_SACCH_Thres = 3
Feature Overview
Repeated SACCH Illustrations
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Feature Overview
Repeated DL SACCH Illustrations
SRR count BFI count
NOK
#2, SRR = 0#2, SRO = 0
#1, SRR = 0#1, SRO = 0
#3, SRR = 1#3, SRO = 0
#4, SRR = 0#4, SRO = 0
#5, SRR = 1#5, SRO = 0
#6, SRR = 1#6, SRO = 0
#7, SRO = 0 #7, SRR = 0
#8, SRR = 1#8, SRO = 0
Call startBTS MS
#8 repeated, SRO = 0 #9, SRR = 1
#9, SRO = 0 #10, SRR = 1
OKOK0/1 0/1N/A
OK0/2 NOK0/2N/A
NOK0/3 OK1/3
Frame notdecoded! SRRvalue of last
correct frame istaken OK0/4 NOK1/4N/A
OK1/5 NOK1/5N/A
OK2/6 OK1/6N/A
OK2/7 1/7 NOKN/A
OK3/8 NOK1/8
RDSACCH
dynamicallyactivated N/A
OK4/9 1/9 NOKN/A
OK5/10 1/10 OKN/A
Result of first decodingattempt BS side Result of first decodingattempt MS side
Because last DLSACCH frame
not decoded
Count of SRR = 1 in lastRep_DL_SACCH_WS frames
Assumption:
Rep_DL_SACCH_WS = 10
Rep_DL_SACCH_Thres = 3
Count of bad frames in lastRep_UL_SACCH_WS frames
Assumption:
Rep_UL_SACCH_WS = 10Rep_UL_SACCH_Thres = 3
As UL Framewas not
decoded, soft
combining istried
Incrementedbecause SRR = 1
Incrementedbecause SRR = 1
NOK
According to spec, MSshall try soft combining
with previous Frame ifcurrent Frame is not
decoded
NOK
NOK
NOK
NOK
OK
Possibility tohave good
decoding due to
repetition ofmessage andsoft combining
Result after softcombining, if applicable
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Feature Overview
Repeated UL SACCH Illustrations
NOK
#2, SRR = 0#2, SRO = 0
#1, SRR = 0#1, SRO = 0
#3, SRR = 1#3, SRO = 0
#4, SRR = 0#4, SRO = 0
#5, SRR = 0#5, SRO = 0
#6, SRR = 0#6, SRO = 0
#7, SRO = 1 #7, SRR = 0
#7 repeated, SRR = 0#8, SRO = 1
BTS MS
#9, SRO = 1 #8, SRR = 1
#10, SRO = 1 #8 repeated, SRR = 1
OKOK0/1 0/1N/A
OK0/2 NOK0/2N/A
NOK0/3 OK1/3
Frame notdecoded, SRRvalue of last
correct frame istaken
OK0/4 OK1/4N/A
NOK0/5 OK2/5
NOK0/6 OK3/6NOK
NOK0/7 4/7 OKNOK
NOK0/8 NOK5/8
RUSACCHdynamicallyactivated
OK
NOK0/9 6/9 OKNOK
NOK1/10 7/10 OKOK
SRR = 1 becauseUL SACCHframe is
repeated
Because last DLSACCH frame was
not decodedNOK
SRR count BFI count
As UL Framewas not
decoded, soft
combining istried
SRO = 1,requesting the
UL framesrepetition
NOK
NOK
Possibility tohave good
decoding due to
repetition ofmessage andsoft combining
Possibility tohave good
decoding due to
repetition ofmessage andsoft combining
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1.4 Feature OverviewLimitations
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Feature Overview
Limitations
Theoretical limitations of the feature
No Repeated UL FACCH has been defined.
Consequently, during multi-block HOs, the response from the MS to the BTS
cannot be repeated and therefore, for these HOs the signaling link (in UL)
has the same performances than legacy FACCH.
The feature is fully available (RDFACCH + RSACCH) on Release 6 MS only.
But RDFACCH can also be enabled for command frames for all MS.
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Feature Overview
Multi-Block Handovers Limitation
Multi-block Handovers
Length of LAPDm messages is fixed:
23 bytes for FACCH, with 20 bytes of payload
21 bytes for SACCH, with 18 bytes of payload
Some messages can exceed this limit in some cases. This is typically the
case of intercell HO commands from TCH with legacy codec to AMR TCH.
UL ACK is needed for the first block
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2 Activation Strategy
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2.1 Activation StrategyPre-requisites
A i i S
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Activation Strategy
Pre-requisites
AMR is activated in multi codec configuration using subset codecs containing codecs
more robust than signaling codecs.
Significant AMR calls penetration, which can be checked by the indicator;
RTCH_assign_AMR_penetration_rate.
Significant penetration of Repeated ACCH capable MS Checked through the new
indicator; RxACCH_MS_Penetration_Rate.
AMR Codec Subset and Codec Adaption thresholds should be optimized for area of
feature activation Checked through the RMS report ; ALC_MONO_RMS_AMR
Repeated ACCH feature is not supported by BSC G2.
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2.2 Activation StrategyParameter Settings
Activation Strategy
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{0,1,...,8}3/
3
{0, 1}2/0
{0, 1, 2}1/0
Range/
Default
value
3
0
2
Recommended
ValueParameter Name Definition Instance
EN_REP_DL_FACCHEnables repeated downlink FACCH for
AMR callsCell
REP_DL_FACCH_LEGACY_SUPPORT
Legacy support for repeated downlinkFACCH for AMR calls
Remarks:
1. This parameter is relevant only ifrepeated downlink FACCH is enabled
(EN_REP_DL_FACCH parameter)
2. This parameter concerns only theLAPDm command frames.
Cell
REP_DL_FACCH_THRES_AMR_FR
Repeated DL FACCH activationthreshold for AMR FR. Dynamicactivation is done as long as codec
mode request CMR threshold.
Cell
1 0: disabled; 1: enabled for LAPDm command frames; 2: enabled for LAPDm command frames and also for response frames
2 0: repeated DL FACCH enabled only for AMR MS with repeated ACCH Capability bit = 1; 1: repeated DL FACCH enabled for allAMR MS
3 0: off; 1: 4,75 kbs; 2: 5,15 kbs ; 3: 5,90 kbs; 4: 6,70 kbs; 5: 7,40 kbs; 6: 7,95 kbs; 7: 10,2 kbs; 8: 12,2 kbs
New parameters
Activation Strategy
Parameter settings
Activation Strategy
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{0,...,127}/10
{0,1}/0
{0, 1, 2}2/1
{0,1,...,5}1/3
Range/ Default
valueParameter Name Definition
Instan
ce
Recommended
value
REP_DL_FACCH_THRES_AMR_HR
Repeated DL FACCH activationthreshold for AMR HR. Dynamic
activation is done as long as codecmode request CMR threshold.
Cell 3
REP_DL_FACCH_THRES_AMR_WB
Repeated DL FACCH activationthreshold for AMR WB. Dynamicactivation is done as long as codecmode request CMR threshold.
Cell NA
EN_REP_SACCH
Enables repeated SACCH for SAPI 0frames in case of AMR calls (for mobilestation having indicated the support ofthe feature).
Cell 1
RADIOLINK_REP_DL_SACCH
Repeated DL SACCH activationthreshold for UL RLT (Radio LinkTimer) counter. Dynamic activation istriggered in the BTS when the UL RLTcounter is inferior or equal to thatthreshold.
Cell10
For RLT of 24
1 0: off; 1: 4,75 kbs; 2: 5,15 kbs ; 3: 5,90 kbs; 4: 6,70 kbs; 5: 7,40 kbs
2 0: off; 1: 6,60 kbs; 2: 8,85 kbs ; 3: 12,65 kbs
New parameters
Activation Strategy
Parameter settings
Activation Strategy
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1 If the customer has customized parameter L_RXQUAL_xL_P (where x is U or D) in
the previous release, then the new parameter L_RXQUAL_xL_P_AMR_RXACCH
must be updated in the CDE table with THAT customized value.
To take benefit from the feature repeated ACCH, Alcatel-Lucent recommends:
L_RXQUAL_UL_P_AMR_RXACCH L_RXQUAL_UL_P
AND
L_RXQUAL_DL_P_AMR_RXACCH L_RXQUAL_DL_P.
Parameter Name Definition InstanceRange/
Default value
Recommended
values
L_RXQUAL_UL_P_AMR_RXACCH1
Lower uplink quality threshold for
power control for AMR calls withactivated Repeated DL FACCH andRepeated SACCH.
Cell {0,...,7}/3
Equal to
L_RXQUAL_UL_P
or slightly higher
L_RXQUAL_DL_P_AMR_RXACCH1
Lower downlink quality thresholdfor power control for AMR callswith activated Repeated DL FACCHand Repeated SACCH.
Cell {0,...,7}/3
Equal to
L_RXQUAL_UL_P
or slightly higher
New parameters
Activation Strategy
Parameter settings
Activation Strategy
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Modified parameters
Parameter Name Definition changes InstanceRange/
Default value
Recommended
value
RADIOLINK_TIMEOUT_BS_AMR
Counter threshold to detect a radio link
failure on the uplink path for calls using anAMR codec and for which Repeated SACCHand/or Repeated DL FACCH are notactivated.
Cell {1,...,255}/18 32
RADIOLINK_TIMEOUT_BS1
Updated the definition: this timer can alsobe used for AMR calls (NB or WB) for whichRepeated SACCH and Repeated DL FACCHare activated
Cell {1,...,255}/18 NA
RADIOLINK_TIMEOUT_AMR1Initial value of MS counter for radio linksupervision, when an AMR codec is usedand for which call Repeated SACCH and/orRepeated DL FACCH are not activated.
Cell {4,...,64}/16 32
RADIOLINK_TIMEOUT1 (BSC)This also applies toRADIOLINK_TIMEOUT1 (MFS)
Updated the definition: this timer can alsobe used for AMR calls (NB or WB) for whichRepeated SACCH and Repeated DL FACCHare activated
Cell {4,...,64}/16 NA
1 HMI name for RADIOLINK_TIMEOUT_BS is RADIOLINK_FAILURE_THRES
HMI name for RADIOLINK_TIMEOUT_BS_AMR is RADIOLINK_FAILURE_THRES_AMR
Coding rule for RADIOLINK_TIMEOUT and RADIOLINK_TIMEOUT_AMR is as follows:step size = 4 Samfr, coded from 0 to 15 (0 == 4 Samfr, 1 == 8 Samfr ... 15 == 64 Samfr)
Activation Strategy
Parameter settings
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3 Feature Assessment
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3.1 Feature AssessmentImpact of other features on performance
Feature Assessment
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RSACCH and RadioLink Supervision
RadioLink supervision
When a SACCH block is received a first decoding is performed without
combining
1) If it is correct RLC is incremented by 2
2) If it fails new decoding performed using soft combining with previous SACCH
block
a) if it is correct RLC is incremented by 2
b) if it fails RLC is decremented by 1
Feature Assessment
Impact of other features on performance
Feature Overview
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RSACCH and RadioLink Supervision
Interaction with RadioLink Timeout
For an AMR call, when both RDFACCH and RSACCH are activated the legacy
RadioLink Timeout is used i.e. the following parameters:
RADIOLINK_TIMEOUT
RADIOLINK_TIMEOUT_BS
Differentiated RadioLink Timeout for AMR (RADIOLINK_TIMEOUT_AMR andRADIOLINK_TIMEOUT_BS_AMR) will be used in the following conditions:
AMR calls placed by MS not supporting Repeated ACCH
AMR calls placed by any MS if at least one of the two features is not allowed
(RDFACCH or RSACCH).
Repeated SACCH & Radio Link Supervision
R6 MS will be using RxACCH for AMR calls
Pre-Rel6 MS will be using DRLT for AMR calls
Activating both features will improve the performance of all AMR calls
R6 MS will be using RxACCH for AMR calls
Pre-Rel6 MS will be using DRLT for AMR calls
Activating both features will improve the performance of all AMR calls
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3.2 Feature AssessmentNew Counter and Indicators
Feature Assessment
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New Counters
Telecom Counters
Counterrefname LongName Definition
Measuredobject Domain Type
MC990 NB_MS_REPEATED_ACCH_Capable Number of calls for which the mobile stationssupporting the repeated ACCH capability TRX Quality ofservice 110
MC991 NB_Calls_RFACCH_ActivatedNumber of calls for which repeated DL FACCH is
activated by the BSCTRX
Quality of
service110
MC992 NB_Calls_RSACCH_ActivatedNumber of calls for which repeated SACCH (DL
or UL) is activated by the BSC
TRXQuality of
service
110
MC993 NB_AMR_TCH_DROP_RLF_TRX
Number of AMR TCH (NB or WB AMR) for which
Repeated SACCH is not activated, dropped inTCH established phase due to radio link failure
(radio link timeout or Lapdm timer expiry), per
TRX.
TRXQuality of
service
110
MC994NB_AMR_TCH_DROP_RLF_TRX_
RSACCH
Number of AMR TCH (NB or WB AMR) for whichRepeated SACCH is activated, dropped in TCH
established phase due to radio link failure
(radio link timeout or Lapdm timer expiry), per
TRX. This counter takes into account TCH in
traffic.
TRX
Quality of
service110
Feature Assessment
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New Counters
Counterrefname LongName Definition
Measuredobject Domain Type
MC995NB_AMR_TCH_DROP_OUT_HO_
TRX
Number of TCH using AMR codecs (NB or WB)
but with Repeated FACCH not activated,dropped during the execution of any TCH
outgoing handover, per TRX. This counter takes
into account handovers from TCH in traffic.
TRXQuality of
service110
MC996NB_AMR_TCH_DROP_OUT_HO_
TRX_RFACCH
Number of TCH using AMR codecs (NB or WB)
and with Repeated FACCH activated, droppedduring the execution of any TCH outgoing
handover, per TRX. This counter takes intoaccount handovers from TCH in traffic or in
signaling mode.
TRXQuality of
service110
Telecom Counters
Feature Assessment
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New Counters (type 10 & 15)
Counterrefname LongName Definition
Measuredobject Domain Type
S09 NB_FRAMES_NOT_REPEATED
Indicates the number of SAPI 0 frames that were
not repeated.This counter corresponds to the CNT_I_TX field
of the 48.058 PHYSICAL CONTEXT CONFIRM
message.
(SDCCH
observations)QoS 101
S16 NB_FRAMES_REPEATED
Indicates the number of SAPI 0 frames that were
repeated at least once.This counter corresponds to the CNT_I_RETX
field of the 48.058 PHYSICAL CONTEXT CONFIRMmessage.
(SDCCH
observations)QoS 101
T08 NB_FRAMES_NOT_REPEATED
Indicates the number of SAPI 0 frames that were
not repeated.
This counter corresponds to the CNT_I_TX fieldof the 48.058 PHYSICAL CONTEXT CONFIRM
message.
(TCH
observations)QoS 151
T15 NB_FRAMES_REPEATED
Indicates the number of SAPI 0 frames that wererepeated at least once.
This counter corresponds to the CNT_I_RETX
field of the 48.058 PHYSICAL CONTEXT CONFIRM
message.
(TCH
observations)QoS 151
1Type 10 is SDCCH observation; type 15 is TCH observation
Telecom Counters
Feature Assessment
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BTS
Cell
MS
TC MSC
Abis
AterMUX-CS
A
BSC
CHANNEL
ACTIVATION or MODE
MODIFY messages
CONNECTION FAILURE
INDICATION
or
ERROR INDICATION messages
MC990 & MC991 & MC992
MC993 & MC994
Number of calls for whichthe mobile stationssupporting the repeatedACCH capability
Number of calls for whichrepeated DL FACCH isallowed by the BSC
Number of calls for whichrepeated SACCH (DL or UL) isallowed by the BSC
Number of AMR TCH (NB or
WB AMR) for whichRepeated SACCH is not
activated, dropped in TCHestablished phase due to
radio link failure (radio linktimeout or Lapdm timer
expiry), per TRX.
Number of AMR TCH (NB or WBAMR) for which Repeated SACCH is
activated, dropped in TCHestablished phase due to radio
link failure (radio link timeout orLapdm timer expiry), per TRX.This counter takes into account
TCH in traffic.
Number of TCH using AMR codecs (NB or WB) but withRepeated FACCH not activated, dropped during theexecution of any TCH outgoing handover, per TRX.
This counter takes into account handovers from TCHin traffic.
MC995 & MC996
Number of TCH using AMR codecs (NBor WB) and with Repeated FACCH
activated, dropped during theexecution of any TCH outgoinghandover, per TRX. This counter
takes into account handovers fromTCH in traffic or in signaling mode.
Telecom Counters
Feature Assessment
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Specific new basic indicators
Telecom Indicators
NPOindicatorrefname LongName NPO
FormulaNPO B11 Description
GSDRACN MS_REPEATED_ACCH_Capable MC990
Counts the number of calls of mobile stations
supporting the repeated ACCH capability. Ittakes into account both Normal assignment
and incoming HO and DR.
GSDRFACN Call_RFACCH_BSC Activated MC991
Counts the number of calls for which repeated
DL FACCH is activated by the BSC. In this
context activation means that repetition is
allowed by the BSC yet for frames to be
repeated it is only dependent on BTS. It takesinto account both Normal assignment and
incoming HO and DR.
GSDRSACN Call_RSACCH_BSC_Activated MC992
Counts the number of calls for which repeated
SACCH (DL or UL) is activated by the BSC. In
this context activation means that repetition
is allowed by the BSC yet for frames to be
repeated it is only dependent on BTS. It takesinto account both Normal assignment and
incoming HO and DR.
Feature Assessment
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Specific new basic indicators
Counts the number of AMR TCH (NB or WB
AMR) for which Repeated SACCH is activated
by the BSC, dropped in TCH established phasedue to radio link failure (radio link timeout or
Lapdm timer expiry), per TRX. This counter
takes into account TCH in traffic.MC994AMR_TCH_DROP_RSACCH_ActivatedGTCRSACN
Counts the number of TCH using AMR codecs
(NB or WB) but with Repeated FACCH not
activated, dropped during the execution of
any TCH outgoing handover, per TRX. Thiscounter takes into account handovers from
TCH in traffic.MC995
AMR_TCH_DROP_OUT_HO_No_RFACCH
_ActivatedGTCNRFACN
NPOindicatorrefname LongName NPO
FormulaNPO B11 Description
GTCNRSACN AMR_TCH_DROP_No_RSACCH_Activated MC993
Counts the number of AMR TCH (NB or WB
AMR) for which Repeated SACCH is notactivated by the BSC, dropped in TCH
established phase due to radio link failure
(radio link timeout or Lapdm timer expiry),
per TRX.
Telecom Indicators
Feature Assessment
T l I di
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Specific new basic indicators
Counts the number of TCH using AMR codecs
(NB or WB) and with Repeated FACCHactivated, dropped during the execution of
any TCH outgoing handover, per TRX. This
counter takes into account handovers from
TCH in traffic or in signaling mode.MC996
AMR_TCH_DROP_OUT_HO_RFACCH_Act
ivatedGTCRFACN
NPOindicatorrefname LongName NPO
FormulaNPO B11 Description
Telecom Indicators
Feature Assessment
T l I di t
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Penetration rate for the mobile stations,already in call state, with RDFACCH BSC
activated
MC991/(MC703+MC15a+
MC15b)
RDFACCH_BSC_Activated_MS_Penet
ration_RateGSDRFACPR
Penetration rate for the mobile stations,
already in call state, with RSACCH BSC
activated.
MC992/
(MC703+MC15a+
MC15b)
RSACCH_BSC_Activated_MS_Penetra
tion_RateGSDRSACPR
Represents the ratio of AMR calls with R6
Mobile stations, that are capable and allowedby the BSC of supporting both RSACCH and
RDFACCH with respect to the whole population
of considered calls that are at least capable
and allowed by the BSC to support RDFACCHMC992 / MC991
RxACCH_R6_MS_capable_Calls_Rati
oGSDRACR6MSCO
Represents the ratio of AMR calls with Pre-R6
Mobile stations, that are capable and allowed
by the BSC of supporting RDFACCH with respectto the whole population of considered calls
that are at least capable and allowed by the
BSC to support RDFACCH
(MC991-MC992)
/ MC991
RDFACCH_Active_PreR6_MS_capabl
e_Calls_RatioGSDRFAPR6MSCO
NPOindicatorrefname LongName NPO
FormulaNPO B11 Description
GSDRACCPR RxACCH_MS_Penetration_Rate
MC990 /(MC703
+ MC15a +
MC15b)
Penetration rate for the mobile stations,
already in call state, supporting the repeated
ACCH capability
Specific new computed indicators
Telecom Indicators
Feature Assessment
T l I di t
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Ratio of AMR with RDFACCH not allowed HOdrops compared to total HO drops
(MC995) / ( MC621+ MC995 + MC996)AMR_NoRDFACCH_Call_drop_HO_ratioGSDNRFACCDHO
Ratio of AMR with RDFACCH allowed HO
drops compared to total HO drops
(MC996) / ( MC621
+ MC995 + MC996)AMR_RDFACCH_Call_drop_HO_ratioGSDRFACCDHO
Ratio of Non AMR radio drops compared to
total radio drops
MC736 / (MC736 +
MC993 + MC994)NonAMR_Call_drop_radio_ratioGQSNACDRO
Ratio of Non AMR HO drops compared to
total HO drops
MC621 / (MC621 +
MC995 + MC996)NonAMR_Call_drop_HO_ratioGQSNACDHO
Ratio of AMR without RSACCH allowed callsradio drops compared to total radio drops
(MC993) / (MC736+ MC993 + MC994)AMR_NoRSACCH_Call_drop_radio_ratioGSDNRSACCDRO
Ratio of AMR with RSACCH allowed calls
radio drops compared to total radio drops
(MC994) / (MC736
+ MC993 + MC994)AMR_RSACCH_Call_drop_radio_ratioGSDRSACCDRO
NPOindicatorrefname LongName NPO
FormulaNPO B11 Description
Specific new computed indicators
Telecom Indicators
Feature Assessment
Telecom Indicators
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Rate of non AMR calls failed due to
Radio with respect to non AMR Normal
assignment requests (including requests
that might fail during the period of TCHassignment to TCH phase).
MC736 / (MC702a +MC702b + MC702c)NonAMR_NA_Call_radio_fail_rateGQSNANARFR
Rate of AMR calls failed due to HO with
respect to AMR Normal assignment
requests (including requests that might
fail during the period of TCH assignmentto TCH phase).
(MC995+MC996) /
(MC704a + MC704b +MC931)AMR_NA_Call_HO_fail_rateGQSANAHOFR
Rate of non AMR calls failed due to HOwith respect to non AMR Normal
assignment requests (including requests
that might fail during the period of TCH
assignment to TCH phase).
MC621 / (MC702a +
MC702b + MC702c)NonAMR_NA_Call_HO_fail_rateGQSNANAHOFR
Rate of AMR calls failed due to Radio
with respect to AMR Normal assignmentrequests (including requests that might
fail during the period of TCH assignment
to TCH phase).
(MC993+MC994) /
(MC704a + MC704b +
MC931AMR_NA_Call_radio_fail_rateGQSANARFR
NPOindicatorrefname LongName NPO
FormulaNPO B11 Description
Specific new computed indicators
Telecom Indicators
Feature Assessment
Telecom Indicators
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Rate of AMR with RDFACCH allowed calls
failed due to HO with respect to BSCactivated RDFACCH AMR Normal
assignment, incoming HO and DR requests
(including requests that might fail duringthe period of TCH assignment to TCH
phase).MC996 / MC991AMR_RDFACCH_Call_HO_fail_rateGSDRACCAFDR
Rate of AMR with RSACCH allowed calls
failed due to Radio with respect to allowedRSACCH AMR Normal assignment, incoming
HO and DR requests (including requests that
might fail during the period of TCH
assignment to TCH phase).MC994 / MC992AMR_RSACCH_Call_radio_fail_rateGSDRACCASDR
NPOindicatorrefname LongName NPO
FormulaNPO B11 Description
Specific new computed indicators
Telecom Indicators
Feature Assessment
Telecom Indicators
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The formula only takes into account SV3. Its update to
considered also SV5. (mc701d+mc932) / mc140aRTCH_assign_AMR_penetration_rateGTMMSAMR
NPOindicatorrefname LongName NPO Modification
Specific computed indicators modified
Old counters MC736 or MC621 were modified dueto introduction of new drop counters, MC993,
MC994, MC995 and MC996.
This caused formula modifications on several old
indicators like Call_drop_rate orRTCH_drop_HO_rate. For details on extension of
indicators affected see slides of PM counters
Telecom Indicators
Feature Assessment
Telecom Indicators
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Report dedicated to the feature Repeated ACCH.
Please refer to feature test plan for other NPO reports that can be interesting to
monitor the feature behavior
Split of call drop HO for AMR and NonAMR callsAlc_drop_HO_AMR_and_NonAMR
Split of call drop radio for AMR and NonAMR
callsAlc_drop_radio_AMR_and_NonAMR
AMR HO drop with and without FACCH.Alc_AMR_and_SACCH
Calls with RFACCH or RSACCH allowed.Alc_ACCH_allowed
AMR radio drop with and without SACCH.Alc_AMR_and_FACCH
NPO report name Views in the report Description of the views
Alc_Mono_Repeated_ACCH
Alc_ACCH_MS Mobiles with RACCH capable and penetrationrate.
Telecom Indicators
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3.3 Feature AssessmentMonitoring Method
Feature Assessment
Monitoring Method
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Planning Overview
Test Category Test Type Trial Period
Statistical Non Regression Two Weeks
Optimization Four Weeks
Unitary SACCH Five Days
FACCH Five Days
One RNE resource is required for generic Statistical and Unitary Tests
Monitoring Method
Feature Assessment
Monitoring Method
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g
0W945.11AMR_START_MODE_FR
{12.2 Kbps, 10.2 Kbps,
7.4 Kbps, 4.75 Kbps}W945.1{12.2 Kbps}AMR_FR_SUBSET
26W945.122AMR_HR_THR3
26W945.116AMR_HR_THR2
20W945.110AMR_HR_THR1
22W945.116AMR_FR_THR3
Value aftermodification
Date ofmodification
InitialsettingParameter Name
AMR subset is changed to multi codec configuration to reproduce AMR signaling imbalance
impact due to difference of the redundancy level
AMR codec adaption thresholds are coming from best practice experience
The pilot area is to be frozen during the tests. No network extension to be done neither anylogical parameter change different than those requested by the tests
If AMR is not activated or in mono codec configuration, AMR must be adjustedto multi codec configuration as per the following TMO AMR parameters
adjustment example:
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Statistical Tests
Feature Assessment
Non Regression Tests
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Test Description
The following QoS KPIs will be monitored for the pilot area during reference and activation
period:
Call Drop: Call_drop_rate, Call_drop_radio_rate, Call_drop_HO_rate and AMR/Non AMR call failure
rates
Call Setup: Call_setup_success_rate
Traffic: RTCH_full_duration_avg, RTCH_GSM_Erlang_total and RTCH_DCS_Erlang_total
HO: Success rate, Reversion Old Channel Rate, Rate of HO failure, Rate of HO failure due to Radio
and Handover Efficiency
RMS: Noisy calls causes split and call quality statistics
Feature Assessment
Optimization Tests
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Test Description (1/5)
Pilot area is divided into three cell zones as follows:
Cell zone A is preferably with bad HO KPIs Call drops due to HO and HO success rates
Cell Zone B is preferably with bad CDR KPIs Call drops due to Radio
Cell Zone C is preferably with non optimal radio conditions at cell boarders Coverage gaps in
RMS reports
For more information about the cell zone division criterion please click here
TMO Essen Pilot Example
Feature Assessment
Optimization Tests
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Test Description (2/5)
Change the parameters REP_DL_FACCH_THRES_AMR_YY1,
RADIOLINK_REP_DL_SACCH, and L_RXQUAL_XX_P_AMR_RXACCH 2 per each
cell zone as per following planning
1Where YY is FR or HR and XX is UL or DL
2Only applicable if we can change the parameters L_RXQUAL_XL_P due to recommended rules:
L_RXQUAL_UL_P_AMR_RXACCH > U_RXQUAL_UL_P (mandatory rule)
L_RXQUAL_UL_P_AMR_RXACCH >= L_RXQUAL_UL_P (recommended rule)
L_RXQUAL_xL_P > U_RXQUAL_xL_P (mandatory rule)
Feature Assessment
Optimization Tests
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Test Description (3/5)
3
All BSC75
3
All Pilot
Feature is deactivated, AMR is in
multi-codec configuration
REP_DL_FACCH_THRE
S_AMR_YY
Cell Zone A
10
All BSC
185
10
All Pilot
RADIOLINK_REP_DL_S
ACCH
Cell Zone B
1.9 or 3.4 **
All BSC
41.1
3
All Pilot
L_RXQUAL_XX_P_AMR
_RXACCH
Cell Zone C
Configuration RACCH Final *RACCH Tuning2RACCH Tuning1RACCH DefaultReference
* More information about choosing optimized parameter setting available in optimization test section
** If L_RXQUAL_XX_P=2.9 L_RXQUAL_XX_P_AMR_RXACCH = 3.4
If L_RXQUAL_XX_P=1.1 L_RXQUAL_XX_P_AMR_RXACCH = 1.9
Feature Assessment
Optimization Tests
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Test Description (4/5)
On the 5th week, after deducing the optimized range for each parameter, use the
optimized range of all parameters on the whole pilot area to monitor the effects of
FACCH, SACCH and PC parameters changes combined.
Pilot Area will be divided into two cell zones on week 49:
Cell Zone D: using optimized RxACCH parameters with legacy radio link counter
Cell Zone E: using optimized RxACCH parameters with AMR differentiated radio linkcounter
3232Cell Zone E
2424Cell Zone D
RADIOLINK_TIMEOUT_AMRRADIOLINK_TIMEOUT_BS_A
MRCell Zone
Parameter
TMO EssenPilot
Example
Feature Assessment
Optimization Tests
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Test Description (5/5)
After each stage, the following indicators are observed to deduce optimized parameters values:
Call Drop: [Call_drop_rate, Call_drop_radio_rate, and Call_drop_HO_rate] and AMR/Non AMR call
failure rates
Call Setup: Call_setup_success_rate
Traffic: RTCH_full_duration_avg, RTCH_GSM_Erlang_total and RTCH_DCS_Erlang_total
HO: Success rate, Reversion Old Channel Rate, Rate of HO failure, Rate of HO failure due to
Radio, Handover Efficiency, AMR_TCH_OUT_HO_No_RFACCH_Activated and
AMR_TCH_OUT_HO_RFACCH_Activated
RMS: Noisy calls causes split and call quality statistics
The penetration of RxACCH capable Mobiles is correlated also with theobserved improvements
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Unitary Tests
Feature Assessment
SACCH Unitary Tests
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Test Description
Lock the MS on the frequency of the cell under test
Drive test to record voice quality, RxQual and RxLev at cell border locked each time on
codec AMR-FR, AMR-HR and WB-AMR if available
Perform this test using Release 6 Mobile Station and repeat it to legacy Mobile station
Compare the results before and after feature activation
B: Radio link failurewithout RxACCH
C: Radio link failure with
RxACCH
A: Start measurement(all cases)
Drive test routeCell coveragewith RxACCH
Cell coverage
without RxACCH
BTS
Feature Assessment
FACCH Unitary Tests
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Test Description
Drive test to record voice quality, RxQual, RxLev and HO procedure while crossing the
boarders of the two cells under tests locked each time on codec AMR-FR, AMR-HR and
WB-AMR if available to perform at least 15 HOs
Perform this test before feature activation with optimized AMR RLT thresholds and then
after RxACCH activation
Perform this test using Release 6 Mobile Station and repeat it with legacy Mobile Station
Compare the results before and after feature activation for both releases
Drive test route
Cell coveragewith RxACCH
Cell coverage
without RxACCH
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3.4 Feature AssessmentFOA Test Results
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Statistical Tests Results
Statistical Test Results
RxACCH Capable MS Penetration
B11 Indicators Only
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As the RxACCH capable MS penetration is around 10%, it is not expected to see anoticeable improvement as not all those 10% might be in bad radio conditions during
calls
RDFACCH activation penetration rate dropped from ~85% to ~ 10% starting from the second tuningphase due to disabling the feature for legacy MS due to observing unexpected behavior with thefeature
Penetration Weekly
0.00%
20.00%
40.00%
60.00%
80.00%
100.00%
Time
%
RxACCH_MS_Penetration_Rate 0.00% 9.98% 10.36% 10.93% 10.97% 10.38%
RDFACCH_BSC_Activated_MS_Penetration_
Rate
0.00% 0.00% 85.71% 85.98% 10.97% 10.38%
RSACCH_BSC_Activated_MS_Penetration_R
ate
0.00% 0.00% 10.36% 10.83% 10.97% 10.38%
Mono Codec Multi Codec RACCH Default RACCH
Tuning1
RACCH
Tuning2 RACCH Final
Statistical Test Results
Radio Measurement Statistics
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AMR FR DL Codec Distribution
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
1.20%
1.25%
1.30%
1.35%
1.40%
1.45%
1.50%
1.55%
DL 4.75 FR Frame Distribution 0.12% 1.12% 1.10% 1.04% 1.11% 1.06%
DL 7.4 FR Frame Distribution 0.29% 2.11% 1.21% 1.14% 1.22% 1.16%
DL 10.2 FR Frame Distribution 0.00% 1.71% 1.75% 1.66% 1.76% 1.65%
DL 12.2 FR Frame Distribution 99.54% 94.88% 95.94% 96.15% 95.91% 96.13%
RMS_Call_noisy_DL_rate 1.33% 1.46% 1.46% 1.52% 1.47% 1.44%
Mono Codec Multi Codec RACCH Default RACCH Tuning1 RACCH Tuning2 RACCH Final
AMR FR UL Codec Distribution
00.00%
20.00%
40.00%
60.00%
80.00%
100.00%
120.00%
0.00%
0.50%
1.00%1.50%
2.00%
2.50%
3.00%
3.50%
4.00%
UL 4.75 FR Frame Distribution 0.00% 0.52% 0.49% 0.49% 0.50% 0.50%
UL 7.4 FR Frame Distribution 0.00% 1.39% 1.07% 1.03% 1.08% 1.08%
UL 10.2 FR Frame Distribution 0.00% 1.69% 1.53% 1.47% 1.61% 1.56%
UL 12.2 FR Frame Distribution 100.00% 96.39% 96.90% 97.01% 96.81% 96.86%
RMS_Call_noisy_UL_rate 2.46% 3.17% 3.17% 3.27% 3.38% 3.34%
Mono Codec Mu lt i Codec RACCH Default RACCH Tuning1 RACCH Tuning2 RACCH Final
AMR 12.2 kbps Codec isdominating codec, morerobust codec are not oftenused
Feature impact isexpected to be minimal
as calls are in good radioconditions and using AMR12.2 kbps most of thetime
Statistical Test Results
Non Regression Test
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Non Regression Statistics
0.00%
0.50%
1.00%
1.50%
2.00%
Observation Week
%
HO_Inc_BSC_fail_rate 1.31% 1.30% 1.22%
HO_Inc_BSC_unsuccess_rate 1.55% 1.54% 1.46%
HO_Out_BSC_drop_rate 0.13% 0.13% 0.11%
HO_Out_BSC_prep_fail_rate 0.28% 0.26% 0.28%
HO_Out_BSC_ROC_rate 1.18% 1.17% 1.10%
Call_drop_rate 0.84% 0.89% 0.86%
Call_drop_radio_rate 0.65% 0.69% 0.69%
Mono Codec Multi Codec RACCH Default
Up on activating AMR Multi-Codec, no impact was observed on HO and call drop KPIs
Very slight fluctuations, with a small MS penetration supporting feature, which is using 12.2 Codec most ofthe time (good radio conditions)
Feature brought No Regression on the Pilot
Optimization Test Results
Cell Zone A Optimization of REP_DL_FACCH_THRES_AMR_XR
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HO Statistics
0.00%
0.20%
0.40%
0.60%
0.80%
1.00%
1.20%
1.40%
1.60%
1.80%
2.00%
Time
HO_Inc_BSC_fail_rate 1.55% 1.60% 1.39% 1.40% 1.55%
HO_Inc_BSC_unsuccess_rate 1.67% 1.76% 1.54% 1.55% 1.69%
HO_Out_BSC_drop_rate 0.17% 0.18% 0.15% 0.14% 0.18%
HO_Out_BSC_prep_fail_rate 0.16% 0.16% 0.16% 0.15% 0.16%
HO_Out_BSC_ROC_rate 1.38% 1.40% 1.26% 1.24% 1.39%
Mono Codec Multi Codec RACCH Default RACCH Tuning1 RACCH Tuning2
HO Call Drops
0.00%
0.05%
0.10%
0.15%
0.20%
0.25%
0.30%
0.35%
0.40%
0.45%
Observation Week
NonAMR_NA_Call_HO_fail_rate 0 0.34% 0.26% 0.23% 0.27%
AMR_NA_Call_HO_fail_rate 0 0.38% 0.22% 0.22% 0.26%
AMR_RDFACCH_Call_HO_fail_rate 0 0.00% 0.08% 0.08% 0.08%
Mono Codec Multi Codec RACCH Default RACCH Tuning1 RACCH Tuning2
AMR HO Failurewith RDFACCHsupport as wellgeneric HO failures
did not enhancesignificantly whilemoving theparameter from 3to 5 or 7
Increasing theprobability atwhich theRDFACCH isactivated (using 5or 7) didnt showsignificantimpact.
B11
Indicators
Only
REP_DL_FACCH_THRES_AMR_FR= 3 5 7
REP_DL_FACCH_THRES_AMR_FR= 3 5 7
Optimization Test Results
Cell Zone A Optimization of REP_DL_FACCH_THRES_AMR_XR
Legacy SupportDisabled
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Transmission problems existence during tuning phase increased call drop rates
Observation of the feature indicators showed that some MSs legacy as current assumption- might not bewell impacted during enabling DL FACCH all the time. In graph, it can be seen that call drop is lessimpacted during second tuning phase due to legacy support deactivation
It is recommended to use the REP_DL_FACCH_THRES_AMR_FR= 3 (or the second robust codecequivalent value in the AMR subset) as a good compromise for activating DL FACCH
Moreover as per the current assumptions REP_DL_FACCH_LEGACY_SUPPORT must be disabled to avoidlegacy MSs misbehavior with RDFACCH
Radio Call Drop Rates
0.00%
0.50%
1.00%
1.50%
2.00%
2.50%
3.00%
Observation Week
%
Call_drop_rate 0.90% 0.92% 0.91% 1.29% 1.02%
NonAMR_NA_Call_radio_fail_rate 0.00% 2.01% 2.27% 2.18% 2.77%
AMR_NA_Call_radio_fail_rate 0.00% 0.60% 0.51% 1.04% 0.52%
AMR_RSACCH_Call_radio_fail_rate 0 0.00% 0.17% 0.14% 0.15%
Mono Codec Multi Codec RACCH Default RACCH Tuning1 RACCH Tuning2
REP_DL_FACCH_THRES_AMR_FR= 3 5 7
B11
Indica
torsOnly
Optimization Test Results
Cell Zone B Optimization of RADIOLINK_REP_DL_SACCH
Radio Call Drop Rates
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It is clear that increasing RADIOLINK_REP_DL_SACCH improves the Radio CDR, however the gain
from increasing the parameter to 18 cannot be quantified or compared to RxACCH default activationperiod due to the transmission problem and sites failure during tuning phases
It is seen that the value 5 tuning 1 degrades AMR radio drops when compared to the value 18tuning
Radio Call Drop Rates
0.00%
0.50%
1.00%
1.50%
2.00%
2.50%
3.00%
Observation Week
%
NonAMR_NA_Call_radio_fail_rate 0.00% 2.47% 2.23% 2.15% 2.48%
AMR_NA_Call_radio_fail_rate 0.00% 0.81% 0.62% 0.69% 0.66%
AMR_RSACCH_Call_radio_fail_rate 0 0.00% 0.18% 0.21% 0.22%
Call_drop_rate 0.86% 0.95% 0.94% 1.08% 1.03%
Mono Codec Multi Codec RACCH Default RACCH Tuning1 RACCH Tuning2
REP_DL_FACCH_THRES_AMR_FR= 10 5 18
B11
Ind
icatorsOnly
It is recommended to use the values 10 for a good compromise for activating RSACCH and
unnecessary measurement reports repetition and delayFor RLT of 24, the RADIOLINK_REP_DL_SACCH value can be fine tuned up to 15 to adapt to the
network and customer requirements. Above than 15 if RLT value is higher than 24
Optimization Test Results
Cell Zone C Optimization of L_RXQUAL_XX_P_AMR_RXACCH
HO Call Drops
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0.00%
0.05%
0.10%
0.15%
0.20%
0.25%
Observation Week
%
NonAMR_NA_Call_HO_fail_rate 0 0.18% 0.23% 0.16% 0.18%
AMR_NA_Call_HO_fail_rate 0 0.14% 0.12% 0.10% 0.16%
AMR_RDFACCH_Call_HO_fail_rate 0 0.00% 0.05% 0.04% 0.03%
Mono Codec Multi Codec RACCH Default RACCH Tuning1 RACCH Tuning2Changing the
L_RXQUAL_XX_P_AMR_RXACCH from 3 to 1.1kept the same HOdrops, Yet this is not
totally true as uponusing 1.1 transmissionfailures occurred.
HO Statistics
0.00%
2.00%
4.00%
6.00%
8.00%
10.00%
12.00%
Observation Week
%
HO_Inc_BSC_fail_rate 0.92% 0.84% 0.77% 0.59% 0.87%
HO_Inc_BSC_unsuccess_rate 1.29% 0.99% 0.99% 11.20% 1.18%
HO_Out_BSC_drop_rate 0.11% 0.09% 0.07% 0.07% 0.11%
HO_Out_BSC_prep_fail_rate 0.35% 0.21% 0.24% 9.14% 0.28%
HO_Out_BSC_ROC_rate 0.82% 0.75% 0.70% 0.58% 0.77%
Mono Codec Mult i Codec RACCH Default RACCH Tuning1 RACCH Tuning2
L_RXQUAL_XX_P_AMR_RXACCH= 3 1.1 4
L_RXQUAL_XX_P_AMR_RXACCH= 3 1.1 4
Optimization Test Results
Cell Zone C Optimization of L_RXQUAL_XX_P_AMR_RXACCH
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During changes ofL_RXQUAL_XX_P_AMR_RXACCH from 3 to 1.1 is observed enhances of the radiodrops, but no improves on the radio drops for AMR with RSACCH support
During changes ofL_RXQUAL_XX_P_AMR_RXACCH from 3 to 4 degrades is observed that radio dropsslightly increase, specifically the radio drops for AMR with RSACCH support
The impact of PC parameters tuning cannot be uncorrelated with the transmission problem occurred atthe same time
Radio Call Drop Rates
0.00%
0.50%
1.00%
1.50%
2.00%
Observation Week
%
NonAMR_NA_Call_radio_fail_rate 0.00% 1.75% 1.41% 1.07% 1.20%
AMR_NA_Call_radio_fail_rate 0.00% 0.51% 0.34% 0.36% 0.44%
AMR_RSACCH_Call_radio_fail_rate 0 0.00% 0.11% 0.11% 0.17%
Call_drop_rate 0.68% 0.66% 0.56% 0.52% 0.64%
Mono Codec Multi Codec RACCH Default RACCH Tuning1 RACCH Tuning2
L_RXQUAL_XX_P_AMR_RXACCH= 3 1.1 4
B11
IndicatorsOnly
According to trial the appropriate RxACCH PC parameter to be used is the same as legacy PC parameter.Apparently theres some margin to increasing RxACCH PC parameter more than legacy parameter without
observe impact.
Combining ALU recommendation L_RXQUAL_xL_P_AMR_RXACCH >=L_RXQUAL_xL_P and TMOrecommendation, we will use the following rules:
If L_RXQUAL_XX_P=2.9 L_RXQUAL_XX_P_AMR_RXACCH = 3.4
If L_RXQUAL_XX_P=1.1 L_RXQUAL_XX_P_AMR_RXACCH = 1.9
Optimization Test Results Final optimized values
Radio Call Drop Rates
RxACCH + LRLT --> Radio Call Drop RatesCell Zone D
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AMR multi codec introductionbrought no impact onLRLT+RxACCH cell zone.
However for DRLT+RxACCH slightCDR degradation is noticed
For LRLT cell zone a slight CDRgain is seen (enhancement of6.5% with respect to multi codecreference)
For DLRLT cell zone CDR came toinitial mono codec value,recovering the slight degradationupon using multi codecs (CDRenhancement of 10.3% withrespect to multi codecreference)
0.00%
0.50%
1.00%
1.50%
2.00%
2.50%
Observation Week
%
NonAMR_NA_Call_radio_fail_rate 0.00% 1.99% 2.14% 1.78%
AMR_NA_Call_rad io_fail_rate 0.00% 0.62% 0.49% 0.51%
AMR_RSACCH_Call_ radio_fai l_rate 0 0.00% 0.16% 0.20%
Call_drop_rate 0.92% 0.91% 0.87% 0.85%
Mono Codec Multi Codec RACCH Default RACCH Final
DRLT + RxACCH --> Radio Call Drop Rates
0.00%
0.50%
1.00%
1.50%
2.00%
2.50%
Observation Week
%
NonAMR_NA_Call_radio_fail_rate 0.00% 2.32% 2.11% 1.68%
AMR_NA_Call_radio_fail_ rate 0.00% 0.72% 0.55% 0.48%
AMR_RSACCH_Call_radio_fail_rate 0 0.00% 0.16% 0.19%
Call_drop_rate 0.78% 0.87% 0.86% 0.78%
Mono Codec Multi Codec RACCH Default RACCH Final
B11
IndicatorsO
nly
B11
Indicators
Only
Cell Zone E
Optimization Test Results Final optimized values
HO Call Drop Rates
LRLT+RxACCH --> HO Call Drop Rates
B11 Indicators Only
Cell Zone D
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Is observed a slight improvementfor the AMR HO fail rates withfeature introduction on bothareas
RxACCH capable MS HO drops arestable
RDFACCH capable MS HO dropsslightly enhanced from 0.06% to0.05% for LRLT cell zone andfrom 0.08% to 0.05% for DRLT
0.00%
0.05%
0.10%
0.15%
0.20%
0.25%
0.30%
0.35%
0.40%
Observation Week
%
NonAMR_NA_Call_HO_fail_rate 0 0.34% 0.27% 0.28%
AMR_NA_Call_HO_fail_rate 0 0.34% 0.21% 0.23%
AMR_RDFACCH_Cal l_HO_fail_ rate 0 0.00% 0.08% 0.05%
Mono Codec Multi Codec RACCH Default RACCH Final
DRLT+RxACCH --> HO Call Drop Rates
0.00%
0.05%
0.10%
0.15%
0.20%
0.25%
0.30%
Observation Wee k
%
NonAMR_NA_Call_HO_fail_rate 0 0.19% 0.23% 0.24%
AMR_NA_Cal l_H O_fail_rate 0 0.26% 0.16% 0.20%
AMR_RDFACCH_ Cal l_HO_ fail_rate 0 0.00% 0.06% 0.05%
Mono Codec Multi Codec RACCH Default RACCH Final
Cell Zone E
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Unitary Tests Results
INTRODUCTION
RSACCH Voice Quality Measurements
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Objective: Investigate whats the Voice Quality on the edge of a cell borderand if differences are observed when Repeated SACCH is activated.
Investigate if RSACCH feature can extend the cells edge.
Tests were performed in BSC Essen_1H
MS-Fix calls configuration was used during all the trial
Measurements has consisted on several passages of the same path, starting
the call locked in a cell from a point under good radio conditions up to the
edge of the cell where the call drops 2 different cells were tested in two different RLT tuned areas
Legacy RLT zone Cell Oberhausen-18_3a (CI 30268, BCCH 23)
Differentiated RLT zone Cell Essen-Centrum-9_3 (CI 32571, BCCH 98)
VQ indicator (MOS) was assessed using an ALU internal tool, denominated
Opera
Radio traces (Nemo Outdoor) were done in parallel
MEASUREMENT CONFIGURATION
VQ and Unitary RSACCH Measurements
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Equipment:
MSFix calls configuration
N85 (MS#1) and N95 (MS#2 Not for VQ propose, just for radio traces )
Opera client (SW version 2.4.2) and Opera Server
Laptop with Nemo Outdoor and GPS
PLMN: TMO, BSC Essen_1H
Type of tests:
Mobility test on 2 different cells, in different RLT configurations
Legacy RLT conf (RLT AMR = legacy RLT = 24)
Differentiated RLT conf (RLT AMR = 32)
Each path is repeated 4 times
Sample
Speech sample has a duration of 6.7s with gap of 2.6s between samples
Speech sample is in English language containing male and female voices Test_SAMPLE.wav
MEASUREMENT CONFIGURATION
VQ and Unitary RSACCH Measurements
M bil E i fi i
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Mobile Equipment configuration
1 MS (Nokia N85 MS#1) connected to Opera Client
1 MS (Nokia N95 MS#2) just for air traces
1 Opera Client equipment
1 Opera Server equipment
1 Nemo PC with GPS
USB cable (AT commands, traces)
Audio cable
Nemo PC
MS#1
MS#2
BSC
MSC TC
Opera ClientBS
GPS
Opera Server
Fix line
GEOGRAPHICAL TESTS LOCALIZATION
VQ and Unitary RSACCH Measurements
C ll Ob h 18 3 (CI 30268 BCCH 23) L RLT
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Cell Oberhausen-18_3a (CI 30268, BCCH 23) Legacy RLT area
The path shown in the picture was performed 4 times, for RSACCH feature
enabled, disabled, UL and DL Total of 16 passages
Path representationfor the cell
measured in LegacyRLT area Path
distance 2.4km
Path representationfor the cell
measured in LegacyRLT area Path
distance 2.4km
GEOGRAPHICAL TESTS LOCALIZATION
VQ and Unitary RSACCH Measurements
C ll E C t 9 3 (CI 32571 BCCH 98) Diff ti t d RLT
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Cell Essen-Centrum-9_3 (CI 32571, BCCH 98) Differentiated RLT area
The path shown in the picture was performed 4 times, for RSACCH feature
enabled, disabled, UL and DL - Total of 16 passages
Path representationfor the cellmeasured in
Differentiated RLTarea Path distance
1.3km
Path representationfor the cellmeasured in
Differentiated RLTarea Path distance
1.3km
RESULTS INTRODUCTION
Voice Quality Measurements Results - VQ and Unitary RSACCH Measurements
It was realized a set of tests in 2 different cells In each cell was done
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It was realized a set of tests in 2 different cells In each cell was donemeasurements in DL and UL, also with feature RSACCH enabled and disabled
2 different cells were tested in two different RLT tuned areas
Legacy RLT zone Cell Oberhausen-18_3a (CI 30268, BCCH 23)
Differentiated RLT zone Cell Essen-Centrum-9_3 (CI 32571, BCCH 98)
For each combination, feature enabled/disabled, RLT legacy/differentiated
and UL/DL it was repeated 4 passages
The methodology consists in lock the mobile into the desired cell under goodradio conditions and then moves into the edge of the cell until the call drops
The objective is to observe if feature RSACCH can extended the radius of a cell
maintaining acceptable Voice Quality
During trial the tests for RFACCH were skipped, because it wasnt possible to
find a good spot (HO fail or call drop) to test this feature in practical time
Here is shown time Evolution Graphs (RxLev, RxQual and MOS) in mobility
TIME EVOLUTION GRAPHS
Voice Quality Measurements Results VQ and Unitary RSACCH Measurements
RSACCH Disabled (DL Legacy RLT) VQ samples are recorded in Opera Client
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RSACCH Disabled (DL, Legacy RLT) VQ samples are recorded in Opera Client
Time Evolution Graph - VQ1, DL RSACCH OFF, Legacy RLT
-2
-1
0
1
2
3
4
5
6
7
9:47
:58.93
2
9:48
:08.25
6
9:48
:17.57
8
9:48
:26.90
4
9:48
:36.22
4
9:48
:45.55
0
9:48
:54.87
4
9:49
:04.198
9:49
:13.52
0
9:49
:22.81
0
9:49
:32.
168
9:49
:41.492
9:49
:50.81
6
9:50
:00.
138
9:50
:09.
464
9:50
:18.78
8
9:50
:28.
110
9:50
:37.
430
9:50
:46.76
0
9:50
:55.98
2
9:51
:05.
404
9:51
:14.72
6
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ2, DL RSACCH OFF, Legacy RLT
0
1
2
3
4
5
6
7
10:00:30.2
06
10:00:39.5
30
10:00:
48.852
10:00:58.1
78
10:01:07.5
00
10:01:16.8
24
10:01:26.1
44
10:01:35.4
70
10:01:44.7
92
10:01:54.1
12
10:02:03.4
42
10:02:
12.766
10:02:22.0
90
10:02:31.4
12
10:02:
40.738
10:02:50.0
48
10:02:59.3
78
10:03:08.7
02
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ3, DL RSACCH OFF, Legacy RLT
-2
-1
0
1
2
3
4
5
6
7
10:12:31
.384
10:12:
40.710
10:12:50
.032
10:12:59
.356
10:13:08
.680
10:13:
18.004
10:13:27
.328
10:13:36
.652
10:13:
45.972
10:13:55
.300
10:14:04
.620
10:14:13
.946
10:14:23
.270
10:14:32
.594
10:14:41
.912
10:14:51
.232
10:15:00
.562
10:15:
19.104
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avgRxLev avg
Time Evolution Graph - VQ4, DL RSACCH OFF, Legacy RLT
0
1
2
3
4
5
6
7
10:26:59
.396
10:27:08
.720
10:27:
18.046
10:27:27
.368
10:27:36
.692
10:27:
46.016
10:27:55
.340
10:28:04
.662
10:28:
13.988
10:28:23
.312
10:28:32
.634
10:28:
41.958
10:28:51
.282
10:29:00
.606
10:29:09
.926
10:29:
19.252
10:29:28
.574
10:29:37
.898
10:29:
47.216
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Consistent results for the 4passages:
MOS decrease with DLRxQual decrease in the edgeof the tested cell
TIME EVOLUTION GRAPHS
Voice Quality Measurements Results VQ and Unitary RSACCH Measurements
RSACCH Enabled (DL Legacy RLT) VQ samples are recorded in Opera Client
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RSACCH Enabled (DL, Legacy RLT) VQ samples are recorded in Opera Client
Time Evolution Graph - VQ1, DL RSACCH ON, Legacy RLT
0
1
2
3
4
5
6
7
21:18:2
6.64
2
21:18:3
5.96
6
21:18:4
5.29
0
21:18:5
4.61
4
21:19:0
3.93
4
21:19:1
3.26
0
21:19:2
2.58
4
21:19:3
1.90
6
21:19:4
1.23
2
21:19:5
0.55
6
21:19:5
9.87
8
21:20:0
9.20
0
21:20:1
8.52
4
21:20:2
7.85
0
21:20:3
7.172
21:20:4
6.490
21:20:5
5.82
0
21:21:0
5.14
4
21:21:1
4.466
21:21:2
3.79
2
21:21:3
3.110
21:21:4
2.436
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ2, DL RSACCH ON, Legacy RLT
0
1
2
3
4
5
6
7
21:37:
14.064
21:37:
23.390
21:37:
32.716
21:37:
42.040
21:37:
51.362
21:38:
00.682
21:38:
10.008
21:38:
19.334
21:38:
28.656
21:38:
37.978
21:38:
47.302
21:38:
56.628
21:39:
05.950
21:39:
15.276
21:39:
24.600
21:39:
33.922
21:39:
43.246
21:39:
52.570
21:40:
01.894
21:40:
11.144
21:40:
20.540
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ3, DL RSACCH ON, Legacy RLT
-2
-1
0
1
2
3
4
5
6
7
21:48:52
.058
21:49:01
.382
21:49:
10.702
21:49:20
.030
21:49:29
.352
21:49:38
.678
21:49:
47.100
21:49:57
.324
21:50:06
.648
21:50:
15.972
21:50:25
.296
21:50:34
.618
21:50:
43.942
21:50:53
.266
21:51:02
.590
21:51:11
.914
21:51:21
.238
21:51:30
.560
21:51:39
.884
21:51:49
.206
21:51:58
.520
21:52:07
.824
21:52:
17.178
21:52:26
.342
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ4, DL RSACCH ON, Legacy RLT
-2
-1
0
1
2
3
4
5
6
7
22:01:48
.182
22:01:57
.506
22:02:06
.828
22:02:
16.154
22:02:25
.478
22:02:34
.802
22:02:
44.124
22:02:53
.448
22:03:02
.772
22:03:
12.096
22:03:21
.418
22:03:30
.744
22:03:
40.068
22:03:
49.392
22:03:58
.714
22:04:08
.036
22:04:17
.360
22:04:26
.684
22:04:36
.008
22:04:45
.332
22:04:54
.656
22:05:03
.980
22:05:
13.304
22:05:22
.628
22:05:31
.944
22:05:
41.260
22:05:50
.562
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Similar results through thisdata when the feature isenabled
TIME EVOLUTION GRAPHS
Voice Quality Measurements Results VQ and Unitary RSACCH Measurements
RSACCH Disabled (UL Legacy RLT) VQ samples are recorded in Opera
-
7/22/2019 ALu seminar RX ACCH
93/129
93 | Repeated ACCH All Rights Reserved Alcatel-Lucent 2009
RSACCH Disabled (UL, Legacy RLT) VQ samples are recorded in Opera
Server Time Evolution Graph - VQ1, UL RSACCH OFF, Legacy RLT
0
1
2
3
4
5
6
7
11:34:57
.590
11:35:06
.914
11:35:
16.238
11:35:25
.560
11:35:34
.884
11:35:
44.208
11:35:53
.532
11:36:02
.854
11:36:
12.178
11:36:21
.502
11:36:30
.820
11:36:
40.150
11:36:
49.474
11:37:
17.444
11:37:26
.766
11:37:36
.088
11:37:
45.414
11:38:04
.060
11:38:
13.386
11:38:22
.708
11:38:32
.032
11:38:
41.356
11:38:50
.676
11:39:00
.004
-120
-100
-80
-60
-40
-20
0
MOSRxQ avg
RxLev avg
Time Evolution Graph - VQ2, UL RSACCH OFF, Legacy RLT
0
1
2
3
4
5
6
7
11:55:
12.260
11:55:21
.584
11:55:30
.906
11:55:
40.230
11:55:
49.554
11:55:58
.876
11:56:08
.202
11:56:
17.524
11:56:26
.848
11:56:36
.172
11:56:
45.488
11:56:54
.818
11:57:04
.142
11:57:
13.466
11:57:22
.790
11:57:32
.114
11:57:
41.436
11:57:50
.760
11:58:00
.084
11:58:09
.408
11:58:
18.730
11:58:28
.054
11:58:37
.378
11:58:
46.702
11:58:56
.026
11:59:05
.350
11:59:
14.674
11:59:23
.992
11:59:33
.320
11:59:
42.644
11:59:51
.968
-120
-100
-80
-60
-40
-20
0
MOSRxQ avg
RxLev avg
Time Evolution Graph - VQ3, UL RSACCH OFF, Legacy RLT
0
1
2
3
4
5
6
7
12:08:
11.444
12:08:20
.770
12:08:30
.094
12:08:39
.418
12:08:
48.742
12:08:58
.064
12:09:07
.386
12:09:
16.712
12:09:26
.036
12:09:35
.358
12:09:54
.006
12:10:03
.328
12:10:
12.654
12:10:21
.976
12:10:31
.300
12:10:
49.946
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ4, UL RSACCH OFF, Legacy RLT
0
1
2
3
4
5
6
7
12:18:
47.356
12:18:56
.680
12:19:06
.004
12:19:
15.328
12:19:24
.650
12:19:33
.974
12:19:52
.620
12:20:01
.944
12:20:
11.268
12:20:20
.592
12:20:39
.240
12:20:
48.564
12:20:57
.888
12:21:25
.858
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
MOS is stable during UL tests,because UL is still good whileDL is already dropping thecall Imbalanced cell
TIME EVOLUTION GRAPHS
Voice Quality Measurements Results VQ and Unitary RSACCH Measurements
RSACCH Enabled (UL Legacy RLT) VQ samples are recorded in Opera
-
7/22/2019 ALu seminar RX ACCH
94/129
94 | Repeated ACCH All Rights Reserved Alcatel-Lucent 2009
RSACCH Enabled (UL, Legacy RLT) VQ samples are recorded in Opera
Server Time Evolution Graph - VQ1, UL RSACCH ON, Legacy RLT
0
1
2
3
4
5
6
7
21:47:53
.456
21:48:02
.780
21:48:
12.104
21:48:21
.492
21:48:
40.138
21:48:
49.462
21:48:58
.784
21:49:08
.108
21:49:
17.430
21:49:36
.080
21:49:
45.402
21:49:54
.726
21:50:04
.050
21:50:22
.698
21:50:32
.018
21:50:
41.344
21:50:50
.666
-120
-100
-80
-60
-40
-20
0
MOSRxQ avg
RxLev avg
Time Evolution Graph - VQ2, UL RSACCH ON, Legacy RLT
0
1
2
3
4
5
6
7
21:58:
47.778
21:58:57
.100
21:59:06
.424
21:59:
15.748
21:59:25
.072
21:59:34
.396
21:59:
43.718
21:59:53
.042
22:00:02
.366
22:00:
11.690
22:00:21
.012
22:00:39
.660
22:00:
48.982
22:00:58
.306
22:01:07
.628
22:01:16
.954
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ3, UL RSACCH ON, Legacy RLT
0
1
2
3
4
5
6
7
22:09:21
.292
22:09:30
.616
22:09:
49.260
22:09:58
.586
22:10:07
.910
22:10:
17.234
22:10:26
.556
22:10:35
.876
22:10:
45.204
22:10:54
.528
22:11:03
.850
22:11:22
.498
22:11:31
.822
22:11:41
.142
22:11:50
.470
22:11:59
.786
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ4, UL RSACCH ON, Legacy RLT
0
1
2
3
4
5
6
7
22:20:00
.454
22:20:09
.778
22:20:
19.104
22:20:37
.750
22:20:
47.076
22:20:56
.398
22:21:05
.722
22:21:15
.046
22:21:24
.368
22:21:33
.692
22:21:43
.014
22:21:52
.340
22:22:01
.664
22:22:
10.986
22:22:20
.310
22:22:29
.634
22:22:38
.794
-120
-100
-80
-60
-40
-20
0
MOS
RxQ avg
RxLev avg
The UL tests dont bringadditional information about
feature behaviour becauseUL remains good all the timeduring each passage
TIME EVOLUTION GRAPHS
Voice Quality Measurements Results VQ and Unitary RSACCH Measurements
RSACCH Disabled (DL, Differentiated RLT) VQ samples are recorded in Opera
-
7/22/2019 ALu seminar RX ACCH
95/129
95 | Repeated ACCH All Rights Reserved Alcatel-Lucent 2009
RSACCH Disabled (DL, Differentiated RLT) VQ samples are recorded in OperaClient
Time Evolution Graph - VQ1, DL RSACCH OFF, Differentiated RLT
0
1
2
3
4
5
6
7
10:43:50.364 10:43:59.624 10:44:18.284
-91
-90
-89
-88
-87
-86
-85
-84
-83
-82
-81
-80
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ2, D L RSACCH OFF, Differentiated RLT
0
1
2
3
4
5
6
7
1 0: 57 :2 4. 84 4 1 0: 57 :3 4. 16 8 1 0: 57 :4 3. 49 0 1 0: 57 :5 2. 80 6 1 0: 58 :0 2. 12 6 1 0: 58 :1 1. 40 6
-96
-94
-92
-90
-88
-86
-84
-82
-80
-78
-76
MOS
RxQ avg
RxLev avg
Time Evolution Graph - VQ3, DL RSACCH OFF, Differentiated RLT
-2
-1
0
1
2
3
4
5