b12 fsm reduction of transmitted pddcb ed01 rel
TRANSCRIPT
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
1/46
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT CONFIDENTIAL SOLELY FOR AUTHORIZED PERSONS HAVING A NEED TO KNOW PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCBFeature introduction Strategy & Monitoring
Raluca IOVANAS
MGR TIPS/ Network Engineering & Assurance (NEA)
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
2/46
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT CONFIDENTIAL SOLELY FOR AUTHORIZED PERSONS HAVING A NEED TO KNOW PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
PUBLICATION INFORMATION
Author
Raluca IOVANAS
Reference documentation
Reduction of transmitted PDDCB MEMO 211175
Publication history
September 2012 ED 01
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
3/46
3
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
CONTENTS
1 | FEATURE DESCRIPTION
2 | FEATURE ACTIVATION STRATEGY
4 | PERFORMANCE EVALUATION
5 | RESTRICTIONS / OTHER ISSUES
6 | CONCLUSION
3 | TEST STRATEGY
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
4/46
4
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
CONTENTS
1 | FEATURE DESCRIPTION
2 | FEATURE ACTIVATION STRATEGY
3 | TEST STRATEGY
4 | PERFORMANCE EVALUATION
5 | RESTRICTIONS / OTHER ISSUES
6 | CONCLUSION
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
5/46
5
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
1.1 | INTRODUCTION
1 | Reduction of transmitted PDDCB DESCRIPTION
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
6/46
6
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCB
TECHNICAL DESCRIPTION
The Reduction of transmitted PDDCB is an optional feature and it wasrequested by CMCC in order to reduce the interference in the network
According to 3GPP, the transmission of Packet Downlink Dummy ControlBlock is not mandatory
When there is no RLC/MAC data or control block to transmit, but thenetwork decides to transmit on downlink, it will transmit RLC/MAC controlblocks containing PDDCB message
However, from the total number of PDDCB messages sent , only a smallpercentage contains useful information the rest of them have no content
Therefore, the goal of this feature is to remove the RLC/MAC control blocks
which contain a PDDCB message without carrying useful information
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
7/46
7
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCB
TECHNICAL DESCRIPTION
Packet Downlink Dummy Control Block (PDDCB) message is sent on thePDCHs by the network to the mobile station as a fill message with:
optional parameters - PAGE_MODE and PERSISTENCE_LEVEL
no content
However, the PERSISTENCE_LEVEL is not sent by ALU BSS ( it is alwaysset to 0)
The PAGE_MODE parameter is only useful in case of paging reorganization
(reconfiguration of paging channel), which is related to PCCCH
Today, PCCCH is not used/activated, therefore there is no need to sendPDDCB with paging reorganization
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
8/46
8
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCB
TECHNICAL DESCRIPTION
According to 3GPP, it is not required to transmit PDDCB messagescontinuously on active PDCH when no other PDU is to be sent
The network will send the PDDCB messages, needed by the MS, in the
following two cases:
USF signaling
MS-BSS synchronization for PR mode B
For MS- BSS synchronization, the network will ensure that each MS with anactive TBF in uplink or downlink receives at least one valid radio blocktransmitted with a coding scheme and a modulation that can be decoded by
that MS every 360 millisecond interval
PR mode B - the network will use the same P0 value for all the MS with aTBF established on the same PDCH, therefore the dynamic power reductionvalue shall be calculated relative to this P0 value
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
9/46
9
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCB
TECHNICAL DESCRIPTION
P0 - is a constant power reduction relative to BCCH level
If downlink power control is used, in PR mode B, this valid radio block sentat every 360 milliseconds shall contain a usable PR field and does notnecessarily have to be addressed to any particular MS
This PR field is set according to the dynamic power reduction valuescomputed by RLC/MAC depending on the radio link conditions reported bythe MS
However, PDDCBs, like all RLC/MAC control blocks, do not contain a PR fieldand are sent at BCCH power
Hence, PDDCBs are sent for PR mode B synchronization, without a PR field,at BCCH power
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
10/46
10
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCB
TECHNICAL DESCRIPTIONExpected gains
Gains expected in CMCC network
From the trace collected from Nanjing/Shanghai/Jinhua, the percentage ofuseless PDDCB messages is a little bit less than 48% of all downlink frames sent
However, from the total number of PDDCB messages sent , only a smallpercentage (3.5%) contains useful information and cannot be removed
Hence, the activation of Reduction of transmitted PDDCB feature is expected tobring a PDDCB reduction of approximately 45% of all DL frames sent
* Note that a change in some BSS parameter may modify the PDDCB ratio,independently of this improvement
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
11/46
11
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCB
TECHNICAL DESCRIPTIONExpected gains
Gain estimation for any other traffic model
The BSS sends PDDCB messages when no data or other control message has tobe sent
We can assume that the proportion of useless PDDCBs roughly corresponds to aproportion of time during which a PDCH carries TBF which are all in delayed DL
TBF mode, except for the polling messages used to keep the TBF alive
In this case, for each TBF the MFS sends a DL dummy LLC everyT_DELAYED_DL_TBF_POL (default=200ms), the remaining are PDDCBs
For the case of one PDCH per MS in average (for example, 3 MSs per PDCH and3 PDCHs per MS) there would be on each PDCH one DL LLC PDU every 200ms,which means 10% of radio blocks
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
12/46
12
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Reduction of transmitted PDDCB
TECHNICAL DESCRIPTIONExpected gains
The remaining 90% of radio blocks are carrying PDDCB messages, if all MS are
in TBF DL delayed state
If MSs are in average delayed state 50% of time (this can happen with bursty
traffic such as IM), then with this particular PDCH allocation and TBF multiplexing,
the transmission of PDDCB messages roughly takes 45% of radio blocks (50% x
90%)
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
13/46
13
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
CONTENTS
1 | FEATURE DESCRIPTION
2 | FEATURE ACTIVATION STRATEGY
3 | TEST STRATEGY
4 | PERFORMANCE EVALUATION
5 | RESTRICTIONS / OTHER ISSUES
6 | CONCLUSION
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
14/46
14
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
2.1 | reduction of transmitted PDDCB activation
2 | FEATURE ACTIVATION STRATEGY
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
15/46
15
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
FEATURE ACTIVATION STRATEGY
Reduction of transmitted PDDCB Activation The activation of this feature is provided at cell level from OMC-R
The feature can be activated through the EN_RED_PDDCB parameter which is
sent to the MFS EN_RED_PDDCB = 0 or 1 ( 0 disabled , 1 enabled )
Feature optionality
The Reduction of transmitted PDDCB feature is optional for the network(TRX
quantity controlled) The optionality management will be done in two ways:
All the logical TRXs of the cell where the feature is activated will be counted
Minimum between the number of TRXs configured for PS and the number of
EGPRS-capable TRE of the cell where the feature is activated will be counted Feature availability
This feature is available starting with B12.2 Ed.1 release in TDM only
reduction of transmitted PDDCB will be allowed in IP transport later on
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
16/46
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
17/46
17
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Interaction with TRX Dynamic Power Save
The principle of this feature is to switch-off the PA (power amplifier) bias of agiven TRX when there is nothing to transmit over the air
The feature is activated as soon as one radio timeslot is not transmitting and itis independent of the type of traffic: voice, packet, or signaling
Therefore, the activation of Reduction of transmitted PDDCB feature isexpected to increase the efficiency of the TRX Dynamic power save feature
FEATURE ACTIVATION STRATEGY
Interaction with other features
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
18/46
18
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Interaction with GPRS UL Power Control
The MS measures the DL power received either on PDCH or on BCCH dependingon the system parameter PC_MEAS_CHAN
The MS uses this measurement for UL power control
If the BSS does not transmit PDDCB when no data has to be sent, then therewill be few measurements to rely on and it may disturb UL power control
Therefore, if Reduction of transmitted PDDCB feature is activated, it would bebetter that the MS relied on the BCCH level to make measurement
Consequently, the PC_MEAS_CHAN parameter has to be set so that the MStakes the measurement on BCCH (PC_MEAS_CHAN = 0)
FEATURE ACTIVATION STRATEGY
Interaction with other features
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
19/46
19
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Interaction with GPRS DL Power Control
When packet downlink power control is activated, PC_MEAS_CHAN in BSC andMFS shall be set to 0 (downlink measurements for power control shall be madeon BCCH)
Fortunately, this rule is coherent with the requirement for UL power control and
PDDCB reduction
Interaction with measurements at MS side
Together with other measurement of signal quality, the MS reports the varianceof the received signal level (SIGN_VAR parameter)
The absence or rarity of PDDCB may make this measurement meaningless, but
because this value is not anymore used by ALU BSS no problem is raised
FEATURE ACTIVATION STRATEGY
Interaction with other features
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
20/46
20
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Interaction with GCH statistical multiplexing
In TDM mode, the MAC layer is located in the MFS
The PDDCB are transferred on Abis and Ater interfaces
Not sending the useless PDDCB may diminish the load of the GCH layer
Activating the feature will bring no gain in term of GCH allocation request
Nevertheless, in case of GCH congestion, the available throughput will be better
used (only useful radio blocks)
Today the PDDCB are transmitted in a compressed mode between MFS and BTS(padding bits are inserted by the BTS), hence the PDDCB dont consume muchbandwidth
FEATURE ACTIVATION STRATEGY
Interaction with other features
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
21/46
21
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
2.3 | HW Support
2 | FEATURE ACTIVATION STRATEGY
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
22/46
22
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
FEATURE ACTIVATION STRATEGY
HW SupportThe following is required by product management for hardwaresupport:
BTS: SUMP, SUMA, SUMX, A9100 (Evolium standard)*, A9110-E (M5M)*
A9110 (M4M) does not support this feature
TRE: G4*, G5 TRE (TWIN)* and G6 TRE(MC-TRE and MC-RRH)*
TREs older than G4 do not support this feature
BSC generation: G2, Evolution BSC (MxBSC) with TPV1/ TPV3
TC: not impacted
O&M: OMC-R*, POLO*, NPO*
MFS: Evolution MFS (MxMFS)* - GP2 and GP3
* The feature is supported on the NE with software impacts
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
23/46
23
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
2.4 | NEW PARAMETERS
2 | FEATURE ACTIVATION STRATEGY
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
24/46
24
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
FEATURE ACTIVATION STRATEGY
NEW PARAMETERS
Parameter
NameDefinition
Sub-
System
Instan
ce
Category/OMC-R
access
TypeRange/Default
value
EN_RED_PDDCBEnables/disables the reduction of useless
PDDCB in a cell MFS CellSite (CAE)/Changeable Flag
0 or 1 / 0(disabled)
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
25/46
25
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
CONTENTS
1 | FEATURE DESCRIPTION
2 | FEATURE ACTIVATION STRATEGY
3 | TEST STRATEGY
4 | PERFORMANCE EVALUATION
5 | RESTRICTIONS / OTHER ISSUES
6 | CONCLUSION
7 | APPENDIX A: XXXX
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
26/46
26
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
3.1 | REMOVAL OF USELESS PDDCB TEST STRATEGY
3 | TEST STRATEGY
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
27/46
27
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
OVERVIEW The goal of the feature is to reduce the interference in the network by removing
the RLC/MAC control blocks which contain a PDDCB message without carryinguseful information
The following selected KPIs are verified before and after the feature activation QoS KPIs:
CS
Voice Quality distribution
Delta MOS RxLev, RxQual
Call Drop due to interference, Call Drop Radio
PS
TBF establishment success rate
GPRS/ EDGE throughput
GCH_Erlang_Total
GPRS_GPU_Ater_cong_time
No possible degradations caused by this feature are expected
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
28/46
28
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
REQUIREMENTS
Two categories of tests are required:
Statistical and unitary tests have to be performed
QoS follow up - at least 1 week for the reference period and 1 week forobservation
Voice Quality evaluation through drive tests
Required tools:
NPO or AnaQoS (if NPO is not available) to follow up the QoS KPIs
DT tool chain including VQ support to asses the VQ scores before and after feature
activation (e.g. QVoice from ASCOM, VQ tool from SwissQual, Nemo from Anite) Deutrip
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
29/46
29
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
PREREQUISITES
2 BTSs (at least 3/4 cells) for the pilot area
PS uplink and downlink power control to be activated in the pilot area
RMS measurements have to be activated when starting the reference period
Reference & verification tests made with same parameter setting
Pilot area selection:
Dense urban area with high level of interference due to a low frequency reuse factorshould be chosen
High PS traffic load (UL and DL)
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
30/46
30
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
PLANNING SUMMARY
Test Category Test Type Trial PeriodNeeded
resources
Statistical
Non Regression1 week reference
+ 1 week
observation
1 RNE/NEA expert
for QoS follow-up+ analysis/
troubleshootingImprovement
after reduction oftransmitted
PDDCB activation
1 week reference+ 1 week
observation
Unitary Drive tests 3 Days2 Drive testengineers
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
31/46
31
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
STATISTICAL TESTS MAIN KPIs PS KPIs are the main ones impacted by the feature and should be monitored
This feature may also have impact on voice quality, therefore some CS KPIs willbe monitored
Main KPIs include the following categories:
GPRS Establishment phase - GPRS_GPU_TBF_establishment_request,
GPRS_GPU_TBF_establishment_success_rate
Data throughput - GCH_Erlang_Total, GPRS throughput, EDGE throughput
Data Transfer - GPRS_DL / UL_TBF_drop_rate
GCH Congestion - GPRS_GPU_Ater_cong_time
RMS indicators - Average RxQuality, Average RxLevel, RMS_DL_Power_avg,RMS_DL_Power_avg_per_RxLevel, RMS_DL_Power_avg_per_RxQuality
Voice quality - Delta MOS
Call Drop Call_Drop_DL_Interference, Call_Drop_Radio
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
32/46
32
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
UNITARY TESTS Stationary tests -Voice quality assessment in medium radio conditions
Mobility tests - Voice quality assessment with 2 MSs (medium radio condition)moving around in the selected area
Reference test (for both stationary and mobility tests) - reduction of transmitted PDDCBfeature disabled in all the cells
Observation test (for both stationary and mobility tests) - reduction of transmitted
PDDCB feature enabled in all the cells
Expected outcome:
Comparison of average MOS, RxLev, RxQual values with and without this feature activated
Comparison of VQ scores before and after feature activation
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
33/46
33
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
UNITARY TESTS PS end-user performance tests are performed in two situations
Stationary and mobility tests in good and medium radio conditions
Reference test - reduction of transmitted PDDCB feature disabled in all the cells
Observation test - reduction of transmitted PDDCB feature enabled in all the cells
Requirements:
Gb trace available
FTP server inside the PLMN with access rights
SIM cards
BTS locations (Google Earth), with cells orientations
Expected outcome:
Comparison of the reactivity/accessibility of the network(GPRS/EDGE) to PS requests before andafter the feature activation
Comparison of the download throughput, success rate and duration
Comparison of DL average power before and after feature activation
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
34/46
34
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
TEST STRATEGY
UNITARY TESTSDescription Number of samples TechnologyStationary tests
FTP DL 3 Mbytes 10 FTP transfers EDGE
FTP UL 1 Mbytes 10 FTP transfers EDGE
FTP DL 1 Mbytes 10 FTP transfers GPRS
FTP UL 500 Kbytes 10 FTP transfers GPRS
Ping 32 bytes pause 5s 100 iterations EDGE
Ping 32 bytes pause 5s 100 iterations GPRS
Ping 1460 bytes pause 0s 100 iterations EDGEPing 1460 bytes pause 5s 100 iterations EDGE
WEB/WAP 20 iterations GPRS
WEB/WAP 20 iterations EDGE
Mobility tests
FTP DL 1 Mbytes 10 FTP transfers EDGE
FTP UL 1 Mbytes 10 FTP transfers EDGE
FTP DL 500 Kbytes 10 FTP transfers GPRS
FTP DL 500 Kbytes 10 FTP transfers GPRS
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
35/46
35
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
CONTENTS
1 | FEATURE DESCRIPTION
2 | FEATURE ACTIVATION STRATEGY
3 | TEST STRATEGY
4 | PERFORMANCE EVALUATION
5 | RESTRICTIONS / OTHER ISSUES
6 | CONCLUSION
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
36/46
36
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
4.1 | NEW COUNTERS
4 | PERFORMANCE EVALUATION
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
37/46
37
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
PERFORMANCE EVALUATION
NEW COUNTERS
Counternumber
Mnemonic Definition / Trigger(s)Measured
object
P51 NB_USEFUL_PDDCB_SCHEDULED
Number of useful PDDCB scheduled / Whenever a useful PDDCBis scheduled, this counter is increased. It corresponds to:- USF signalling to MS- PR_MODE_B synchronization
Cell
P52 NB_USELESS_PDDCB_SCHEDULED
Number of useless PDDCB scheduled / Whenever a uselessPDDCB is scheduled, this counter is increased. It corresponds toPDDCB not counted in P51 and it includes next UL blocksignalling to BTS
Cell
These new counters are incremented whether the feature is activated or not in thecell
They might be useful for the customers who would like to experiment this feature
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
38/46
38
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
4.2 | NEW INDICATORS
4 | PERFORMANCE EVALUATION
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
39/46
39
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
PERFORMANCE EVALUATION
NEW INDICATORS
NPO indicatorref name
NPO Long Name NPOFormula
Description
GTRPAUFDN GPRS_Useful_PDDCB_Scheduled P51 Number of useful PDDCB scheduled
GTRPAUSDN GPRS_Useless_PDDCB_Scheduled P52 Number of useless PDDCB scheduled
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
40/46
40
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
CONTENTS
1 | FEATURE DESCRIPTION
2 | FEATURE ACTIVATION STRATEGY
3 | TEST STRATEGY
4 | PERFORMANCE EVALUATION
5 | RESTRICTIONS / OTHER ISSUES
6 | CONCLUSION
i i / O h
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
41/46
41
COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Restrictions / Other Issues
A degradation of QoS has been observed in Telecom load when Reduction oftransmitted PDDCB is activated on GP3 (issue is not observed on GP2)
Consequently, the feature is opened for lab only on GP3 until QoS issue is
clarified
CONTENTS
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
42/46
42COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
CONTENTS
1 | FEATURE DESCRIPTION
2 | FEATURE ACTIVATION STRATEGY
3 | TEST STRATEGY
4 | PERFORMANCE EVALUATION
5 | RESTRICTIONS / OTHER ISSUES
6 | CONCLUSION
C l i
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
43/46
43COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Conclusion
The Reduction of transmitted PDDCB is an optional feature and it wasrequested by CMCC in order to reduce the interference in the network
When there is no RLC/MAC data or control block to transmit, but thenetwork decides to transmit on downlink, it will transmit RLC/MACcontrol blocks containing a PDDCB message
According to 3GPP, the continuous transmission of Packet DownlinkDummy Control Block is not mandatory
However, from the total number of PDDCB messages sent , only a smallpercentage contains useful information the rest of them have no
content
Hence, the goal of this feature is to remove the RLC/MAC control blockswhich contain a PDDCB message without carrying useful information
C l i
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
44/46
44COPYRIGHT 2011 ALCATEL-LUCENT. ALL RIGHTS RESERVED.
ALCATEL-LUCENT INTERNAL PROPRIETARY USE PURSUANT TO COMPANY INSTRUCTION
Conclusion
The activation of Reduction of transmitted PDDCB feature in CMCC isexpected to bring a PDDCB reduction of approximately 45% of all DLframes sent
Nevertheless, the feature can still be used in any other traffic model,different than the CMCC conditions
Its efficiency might be different, depending on the given trafficconditions
There are specific indicators which an operator interested in this featurewill have to use before the introduction, in order to assess its efficiency
in the network
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
45/46
-
8/11/2019 B12 FSM Reduction of Transmitted PDDCB ED01 Rel
46/46