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3G OPTIMIZATION GUIDELINES
3G OPTIMIZATION OVERVIEW
Network
Optimization
Capacity
Management
Netact OSSPerformance Monitoring
NETWORK OPTIMIZATION
OBJECTIVE
Poor Coverage
Optimum Area
Pilot Pollution
Poor Coverage
COVERAGE & DOMINANCEDrive Test
Measurement
Drive Test
Measurement
Coverage area optimization
Coverage area optimization
Dominance area optimization
Dominance area optimization
Complete Measurement
Analysis
Complete Measurement
Analysis
Best server’s CPICH RSCP> -95 dBm
Best server’s Ec/No > -10 dB
Yes
No
Yes
No
Coverage problem area
Dominance area optimization
Dominance area optimization
Dominance problem
area (High best
server Ec/No)
4th Best server’s Ec/No < 6 dB (ref to Best
server)
No
Yes
A
B
C
Dominance problem
area (Low best
server Ec/No)
BLOCK A� Task
� To identify area where RSCP is less than –95 dBm and to optimize the coverage of that affected area
� Reason
� Area where RSCP is less than –95 dBm and poor Ec/No value would be consider coverage problematic area or has poor coverage
� This would lead to call set up failure, HO failure, drop call and degradation to the PS throughput
� Items required for analysis
� RSCP and Ec/No plots for best server on map
� Plot of RSCP vs Ec/No to have quick understanding of the problem
� Measurement log files
� Solution
� Up-tilting, panning and height of antenna changes
� Increase CPICH power
� Antenna type changing to a higher gain
� Check missing neighbors
� Use NetAct to check coverage prediction by changing the inputs of the site
� Use the MapInfo/UMTS tool for antenna tilting to estimate coverage improvement (optional)
BLOCK B
� Tasks
� To identify area which RSCP > -95 dBm but Ec/No < -10 dB and to optimize the affected area
� Reasons
� In this area problems are more on the dominance and pilot pollution
� This would lead to call set up failure, HO failure, drop call and degradation to the PS throughput
� Items required for analysis
� Plots of Ec/No and RSCP for best server on map
� Plots of Ec/No of each scrambling in the affected area
� Plots RSCP vs Ec/No
� Measurement log files
� Solution
� Down-tilting, panning and antenna height changes
� Increase CPICH of serving cell, decrease CPICH of interfering cells
� Check for missing neighbors
� Check co-scrambling code
� Change antenna type to lower gain
BLOCK C� Task
� To identify the 4th best server is < 6dB to the reference of best server
and optimize the area
� Reasons
� To meet the KPI
� Too many best servers would cause unnecessary HO
� Wasting resources (hardware channels, Iub capacity etc)
� Item required for analysis
� Measurement log file
� Solution
� Down-tilting, panning and antenna height changed
� Increase CPICH of serving cell, decrease CPICH of interfering cells
� Use MapInfo/UMTS to generate the percentage
� Antenna type change to lower gain
CAPACITY MANAGEMENT
BLOCKING POINTS IN 3G
NETWORK
NODE B LOADING: UL/DL
LOADING (1)
[ ]dBmkDENOMPRXTOT
kDENOMPRXTOTkCLASSPRXTOTAVE
dBm) (in Load UL AverageRNC_101b
ClassesAllk
ClassesAllk
∑
∑
=
=
×
==
_
_
__
_____
[ ]dBmkDENOMPTXTOT
kDENOMPTXTOTkCLASSPTXTOTAVE
dBm) (in Load DL Average RNC_102b
ClassesAllk
ClassesAllk
∑
∑
=
=
×
=
_
_
__
_____
� Depends on the
dimensioning, typically,
UL Load = 50% & DL
Load = 65%.
� Counters & KPIs that
needs to be monitored.
NODE B LOADING: UL/DL
LOADING (2)
Call Setup Failure due to Radio
Interface resource shortage would
be triggered in RRC and RAB call
setup failure cause “AC”
� Counters that will be
triggered if there is a
limitation on the Node
B load/Power.
� Solutions:
� Upgrade WPA from
20W to 40W
� Parameter Tuning.
� Feature such as Dynamic Power Allocation
NODE B CAPACITY: CHANNEL
ELEMENT (1)WSPC 1 WSPC 2
DL UL DL UL
1 1
2 2
3 3
4 4
5 8 9 10 11 8 8 8 8 5
6 12 13 14 15 9 9 9 9 6
7 16 10 10 10 10 7
8 1 1 1 1 11 11 11 11 8
9 1 1 1 1 12 12 12 12 9 1 2 3 4 1 1 1 1
10 1 1 1 1 16 16 16 16 10 5 6 7 2 2 2 2
11 1 1 1 1 14 14 14 14 11 3 3 3 3
12 2 2 2 2 15 15 15 15 12 4 4 4 4
13 2 2 2 2 16 16 16 16 13 5 5 5 5
14 2 2 2 2 1 1 1 1 14 6 6 6 6
15 2 2 2 2 2 2 2 2 15 7 7 7 7
16 16
Common channels (for 3 carriers)
HSDPA 5 codes
HSDPA associated DCH
(16 users, 16 kbps DL, 128 kbps UL)
384 / 64 kbps DCH users (2 users)
Example baseband configurationwith 2 WSPC cards
Associated dedicated channels arerequired for HSDPA users: 16 kbps DL for uplink power control and SRB and 64…384 kbps UL channel for TCP ACK’s and uplink user data and SRB
HSDPA and associated DCHs effectively balance the baseband UL/DL resource consumption even if the traffic is DL oriented.
NODE B CAPACITY: CHANNEL
ELEMENT (2)� Counters/KPI that
needs to be monitored
in case of lack of CEs
� Solutions:
� Upgrade WSPC or
add more CEs.
� Parameter tuning.
CHANNELIZATION CODES (1)Code Occupancy Monitoring
Code Blocking Monitoring
[ ] %_CAPACITYDENOM_CODE
ITYCODE_CAPACRNC_113a 100×=
∑∑
Average Occupancy Formula
CHANNELIZATION CODES (2)� Call Setup Failure due to
Channelisation Code congestion
would be triggered in RRC and
RAB call setup failure cause “BTS”
� Possible Solution: The code tree is per cell per carrier.
1) If available, go for a 2nd Carrier
2) Add more sites (Macrosite, Microcell Site or In-building
Site).
IuB INTERFACE(1)
In RAS06, the new ATM Interface measurement (M532) gives indication of the ATM interface traffic load by reporting the traffic volumes and the bandwidth available for a specific interface. The measurement can also be used to detect interfaces that are congested and cause traffic loss. Congestion can be detected by following the number of ATM cells going in and coming out from the interface.
AAL2 connections are allocated and released by ATM Resource Management which will check AAL2 reservation using CAC. M550 measurement reports RNC CAC resource usage for Iub AAL2 user plane traffic downlink
IuB INTERFACE(1)Call Setup Failure due
to Radio Interface
resource shortage
would be triggered in
RRC and RAB call
setup failure cause
“Transmission”
RNCWBTSIuB
1E1 = 2Mbps
2E1 = 4Mbps
5 (PS384) users = 1920 Kbps
If 1 E1 = 1920/2000 = 96% IuB Util.
PERFORMANCE MONITORING
OSS KPI PERFORMANCE
MONITORING
• CELL AVAILABILITY
• RRC SET-UP & ACCESS COMPLETE RATIO
• VOICE, VIDEO & PS RAB SET-UP SUCCESS & DROP RATE
• INTER SYSTEM HANDOVER SUCCESS RATE
• SOFT HANDOVER SUCCESS RATE
• SOFT HANDOVER OVERHEAD
CELL AVAILABILITY
Alarm in the cell
start
stop
RNC_183c (Cell Avail)=
100*(cellres.avail_wcell_in_wo_state) /
(cellres.avail_wcell_exists_in_rnw_db)
RNC_727a (CellAvail, excl BLU)=
100*(cellres.avail_wcell_in_wo_state) /
(cellres.avail_wcell_exists_in_rnw_db -
cellres.avail_wcell_blocked_by_user)
RRC SETUP & ACCESS
COMPLETE RATIO� RNC_94e (RRC SACR, NW) = 100*(servlev.rrc_conn_acc_comp +
servlev.rrc_con_setup_comp_directed) / (servlev.rrc_conn_stp_att +
servlev.rrc_conn_setup_comp_aft_dir - servlev.rrc_conn_stp_rej_emerg_call))
� Typical Value >99.00%
VOICE, VIDEO & PS RAB SET-UP
SUCCESS RATE
FAILURE BREAKDOWN
RAB SETUP Fail AC PS Inter
RAB SETUP Fail RNC PS Inter
RAB SETUP Fail Frozen BTS PS Inter
RAB SETUP Fail Frozen Iub PS Inter
RAB ACC Fail UE PS Inter
RAB ACC Fail RNC PS Inter
RAB SETUP Fail AC PS Backg
RAB SETUP Fail RNC PS Backg
RAB SETUP Fail Frozen BTS PS Backg
RAB SETUP Fail Frozen Iub PS Backg
RAB ACC Fail UE PS Backg
RAB ACC Fail RNC PS Backg
FAILURE BREAKDOWN
RAB SETUP Fail AC
RAB SETUP Fail BTS
RAB SETUP Fail Transport
RAB SETUP Fail RNC
RAB SETUP Fail Frozen BTS
RAB ACC Fail UE
RAB ACC Fail RNC
FAILURE BREAKDOWN
RAB SETUP Fail AC
RAB SETUP Fail BTS
RAB SETUP Fail Transport
RAB SETUP Fail RNC
RAB SETUP Fail Frozen BTS
RAB ACC Fail UE
RAB ACC Fail RNC
•PS Data RAB Setup Success Rate
(M1001C120 RAB Acc Comp PS
Inter+M1001C121 RAB Acc Comp PS Background)/(M1001C71 RAB Setup Att PS
Inter+M1001C72 RAB Setup Att PS Backg-
M1001C113 RAB Setup Fail Anchor PS
Back)*100%
�Typical Value >99.00%
•Video RAB Setup Success Rate
(M1001C116 RAB Acc
Comp/M1001C67 RAN Setup Att)*100%
�Typical Value >99.00%
•Voice RAB Setup Success Rate
(M1001C115 RAB Access Comp /M1001C66 RAB Setup
Attempts)*100%
�Typical Value >99.00%
VOICE, VIDEO & PS RAB DROP
CALL RATE
PS DATA FAILURE BREAKDOWNRAB Act Fail Iu PS Inter
Act Fail Radio PS Inter
RAB Act Fail BTS PS Inter
RAB Act Fail Iur PS Inter
RAB Act Fail Integ Chk PS Inter
RAB Act Fail RNC PS Inter
RAB Act Fail UE PS Inter
RAB Act Fail Iu PS Backg
RAB Act Fail Radio PS Backg
RAB Act Fail BTS PS Backg
RAB Act Fail Iur PS Backg
RAB Act Fail Integ Chk PS Backg
RAB Act Fail RNC PS Backg
RAB Act Fail UE PS Back
•PS Data RAB Drop Ratio(M1001C185 RAB Act Fail Iu PS Inter+M1001C186 RAB Act Fail Radio PS Inter+M1001C187 RAB Act Fail BTS PS Inter+M1001C188 RAB Act Fail Iur PS Inter+M1001C190 RAB Act Fail RNC PS Inter+M1001C191 RAB Act Fail Iu PS Backg+M1001C192 RAB Act Fail Radio PS Backg+M1001C193 RAB Act Fail BTS PS
Backg+M1001C194 RAB Act Fail Iur PS Backg+M1001C196 RAB Act Fail RNC PS Backg)/(M1001C141 RAB Act Comp PS Inter+M1001C142 RAB Act Comp PS Backg+M100171 RAB Act Rel SRNC Reloc PS Inter+M1001C172 RAB Act Rel SRNC Reloc PS Backg+M1001C185 RAB Act Fail Iu PS Inter+M1001C186 RAB Act Fail Radio PS Inter+M1001C187 RAB Act Fail BTS PS Inter+M1001C188 RAB Act Fail Iur
PS Inter+M1001C190 RAB Act Fail RNC PS Inter+M1001C191 RAB Act Fail Iu PS Backg+M1001C192 RAB Act Fail Radio PS Backg+M1001C193 RAB Act Fail BTS PS Backg+M1001C194 RAB Act Fail Iur PS Backg+M1001C196 RAB Act Fail RNC PS Backg+M1001C397 RAB Act Fail UE PS Inter+M1001C398 RAB Act Fail UE PS Back)*100%
Typical Value <1.00%
VIDEO FAILURE BREAKDOWNRAB Act Fail Iu
RAB Act Fail Radio
RAB Act Fail BTS
RAB Act Fail Iur
RAB Act Fail Integ Chk
RAB Act Fail RNC
RAB Act Fail UE
•Video RAB Drop Ratio(M1001C155 RAB Act Fail Iu+M1001C156 RAB Act Fail Radio+M1001C157 RAB Act Fail BTS+M1001C158 RAB Act Fail Iur+M1001C159 RAB Act Fail IntegChk+M1001C160 RAB Act Fail RNC+M1001C393 RAB Act Fail UE)/(M1001C37 RAB Act Comp+M1001C151 RAB Act Rel to SRNC Reloc+M1001C152 RAB Act Rel to Pre-Emp+M1001C155 RAB Act Fail Iu+M1001C156 RAB Act Fail Radio+M1001C157 RAB
Act Fail BTS+M1001C158 RAB Act Fail Iur+M1001C160 RAB Act Fail RNC+M1001C393 RAB Act Fail UE)*100%
Typical Value <1.00%
VOICE FAILURE BREAKDOWNRAB Act Fail Iu
RAB Act Fail Radio
RAB Act Fail BTS
RAB Act Fail Iur
RAB Act Fail Integ Chk
RAB Act Fail RNC
RAB Act Fail UE
•Voice RAB Drop Ratio(M1001C145 RAB Act Fail Iu+M1001C146 RAB Act Fail Radio+M1001C147 RAB Act Fail BTS+M1001C148 RAB Act Fail Iur+M1001C149 RAB Act Fail IntegChk+M1001C150 RAB Act Fail RNC+M1001C392 RAB Act Fail UE)/(M1001C136
RAB Act Comp+M1001C143 RAB Act Rel to SRNC Reloc+M1001C144 RAB Act Rel to Pre-Emp+M1001C145 RAB Act Fail Iu+M1001C146 RAB Act Fail Radio+M1001C147 RAB Act Fail BTS+M1001C148 RAB Act Fail Iur+M1001C149 RAB Act Fail Integ Chk+M1001C150 RAB Act Fail RNC+M1001C392 RAB Act Fail
UE)*100%
Typical Value <1.00%
ISHO RT, ISHO NRT, SOFT HOSR &
SHO OVERHEAD
•Soft Handover Overhead((M1007C0 One Cell in AS RT+M1007C1 Two Cells in AS RT+M1007C2 Three Cells in AS RT+M1007C19 One Cell in AS NRT+M1007C20 Two Cells in AS NRT+M1007C21 Three Cells in AS NRT)/((M1007C0 One Cell in AS RT+M1007C19
One Cell in AS NRT)/1+(M1007C1 Two Cells in AS RT+M1007C20 Two Cells in AS NRT)/2+(M1007C2 Three Cells in AS RT+M1007C21 Three Cells in AS NRT)/3)-1)*100%
TYPICAL VALUE <40%
•Soft Handover Success Rate(M1007C15 Succ ASU on SHO RT+M1007C32 Succ ASU on SHO NRT)/(M1007C10 Cell Add Req on SHO RT+M1007C11 Cell Del Req on SHO RT+M1007C12 Cell Rep Req on SHO RT+ M1007C27 Cell Add Req on SHO NRT+M1007C28 Cell Del Req on
SHO NRT+M1007C29 Cell Rep Req on SHO NRT)*100%
TYPICAL VALUE <98%
•ISHO NRT SR100 * sum( SUCC_IS_HHO_UL_DCH_Q_NRT + SUCC_IS_HHO_UE_TRX_PWR_NRT + SUCC_IS_HHO_DL_DPCH_PWR_NRT
+ SUCC_IS_HHO_CPICH_RSCP_NRT + SUCC_IS_HHO_CPICH_ECNO_NRT + SUCC_IS_HHO_IM_IMS_NRT + SUCC_IS_HHO_EMERG_CALL
+ SUCC_IS_HHO_LB_PRX_TOT_NRT + SUCC_IS_HHO_LB_PTX_TOT_NRT + SUCC_IS_HHO_LB_RES_LIM_NRT + SUCC_IS_HHO_LB_RSVR_SC_NRT + SUCC_IS_HHO_SB_NRT)
----------------------------------------sum( IS_HHO_ATT_UL_DCH_Q_NRT + IS_HHO_ATT_UE_TRX_PWR_NRT + IS_HHO_ATT_DPCH_PWR_NRT + IS_HHO_ATT_CPICH_RSCP_NRT
+ IS_HHO_ATT_CPICH_ECNO_NRT + IS_HHO_ATT_IM_IMS_NRT + IS_HHO_ATT_EMERG_CALL + IS_HHO_ATT_LB_PRX_TOT_NRT + IS_HHO_ATT_LB_PTX_TOT_NRT
+ IS_HHO_ATT_LB_RES_LIM_NRT + IS_HHO_ATT_LB_RSVR_SC_NRT + IS_HHO_ATT_SB_NRT )
TYPICAL VALUE > 95%
•ISHO RT SR100 * sum( SUCC_IS_HHO_UL_DCH_Q_RT + SUCC_IS_HHO_UE_TRX_PWR_RT + SUCC_IS_HHO_DL_DPCH_PWR_RT
+ SUCC_IS_HHO_CPICH_RSCP_RT + SUCC_IS_HHO_CPICH_ECNO_RT + SUCC_IS_HHO_IM_IMS_RT + SUCC_IS_HHO_EMERG_CALL
+ SUCC_IS_HHO_LB_PRX_TOT_RT + SUCC_IS_HHO_LB_PTX_TOT_RT + SUCC_IS_HHO_LB_RES_LIM_RT + SUCC_IS_HHO_LB_RSVR_SC_RT + SUCC_IS_HHO_SB_RT)
----------------------------------------sum( IS_HHO_ATT_UL_DCH_Q_RT + IS_HHO_ATT_UE_TRX_PWR_RT + IS_HHO_ATT_DPCH_PWR_RT + IS_HHO_ATT_CPICH_RSCP_RT
+ IS_HHO_ATT_CPICH_ECNO_RT + IS_HHO_ATT_IM_IMS_RT + IS_HHO_ATT_EMERG_CALL + IS_HHO_ATT_LB_PRX_TOT_RT + IS_HHO_ATT_LB_PTX_TOT_RT
+ IS_HHO_ATT_LB_RES_LIM_RT + IS_HHO_ATT_LB_RSVR_SC_RT + IS_HHO_ATT_SB_RT )
TYPICAL VALUE > 98%
Common Call Performance
Issues
Check scanner data and look for missing neighbours.
Check the cabling in antenna line.
A good usable neighbour is
present within cells
coverage area, can
cause DL interference if
it is not in the active set.
Swapped sectors in
WBTS.
Missing neighbour Dropped call/SHO failure
Find interfering cell from Scanner results. Adjust
antenna bearing and down tilt or lower the
antenna height (too much tilt will break the
dominance). Add interfering cell to the
neighbour of the serving cell.
Bad CPICH Ec/Io (<-12 dB)
level although CPICH
RSCP level is good.
High site in the
neighbourhood may
cause interference.
Pilot PollutionCall set-up failure & Call
drop
Use buildings and other environmental structures to
isolate cell(s) coverage. Down tilt antennas to
make cells dominant and limit effects of
interfering cell(s). Check antenna bearing. Add
a site.
No main server in the area, too
many cells with weak
CPICH level. CPICH
EcNo is usually very bad
even the RSCP is good
e.q. RSCP –80…-90
dBm but EcNo about –10
dB
Poor dominance area.Call set-up failure & Call
drop
Check Antenna line installation (antenna position and
quality, cable length and quality). Check that
CPICH powers are balanced between the
studied cells. Check presence of shadowing
obstacles. Add a site to the area.
If problem is poor coverage,
this means poor RSCP
(<-95 dBm) thus also the
EcNo degrades very
rapidly (< -12 dB) when
the coverage border is
reached.
Poor coverage area Call set-up failure & Call
drop
Possible solutionsDescriptionProblemBehaviour
Common Call Performance
Issues
Use smaller value N312 (2, recommendation is
4).Use call set-up time optimisation feature
Dynamic setting of “ActivationTimeOffset”
(possible in RAN1.5.2 ED2) enables 200 to
500ms reduction for set up delay.
The value of Parameter N312
is too high: maximum
number of “in sync”
indications received from
L1 during the
establishment of a
physical channel
Long time interval for
sync between
RNC and BTS
before
connection
Long call set-up time
Set parameters so that reselection process will start
earlier: Qqualmin, Sintrasearch and Qhyst2 as
per latest recommendation
RRC connection set-up
complete message not
heard by BTS.
Bad RRC connection
set-up success
rate due to slow
Ue cell
reselection
Cell set-up failure
Check the antenna installation as the last alternative
in high PrxNoise case.
The PrxTotal level is
significantly higher than
expected in no/low load
conditions.
High Prxtotal due to
Installation
problems
Call set-up failure & Call
drop
In case of MHA is used in BTS check MHA and
cables loss parameters, otherwise PrxTotal
value will be too high. (If MHA parameter is set
to ON, Cable loss parameter is used, Cable
loss = Real MHA gain = Feeder loss
parameter)
The PrxTotal level is
significantly higher than
expected in no/low load
conditions.
High PrxTotal due to
wrong MHA
settings
Call set-up failure & Call
drop
Try to figure the possible area/direction of the
interference by checking PrxTotal level on
neighbouring cells. Alternatively use spectrum
analyser & directive antenna to locate
interferer. Inform operator/regulator about the
found conditions.
The PrxTotal level is
significantly higher than
expected in no/low load
conditions.
High PrxTotal due to
UL External
interference
Call set-up failure & Call
drop
Possible solutionsDescriptionProblemBehaviour
Common Call Performance
Issues
Delete unnecessary neighbours. Improve
dominance.
In SHO area the number of
combined neighbouring cells
become more than 31. HO list
is created using RNC algorithm
in the final stage some of the
neighbours will randomly be
removed.
Too many neighboursDropped call/SHO failure
Use cell individual offset (positive value) parameter
to balance the DL and UL coverage.
The call drops due to too rapid
CPICH coverage degradation
for Cell A, and therefore there
is not enough time for SHO.
Round the corner
effect
Dropped call
Use cell individual offset (positive value) parameter
to balance the DL and UL coverage.
Cell with lower CPICH power
than the surrounding is having
“too good” UL performance, as
this cells’ UL cannot be used
efficiently due to SHO is
decided upon DL (CPICH
Ec/No).
DL CPICH coverage <
UL coverage
Dropped call
Use cell individual offset (negative value) parameter
to balance the DL and UL coverage.
As the UE Tx power is not
enough for target cell
synchronisation, the SHO fails
which will cause call drop later.
Cell suffering from UL
interference = DL
(CPICH) coverage
much bigger than UL
coverage
Dropped call
Possible solutionsDescriptionProblemBehaviour
NetAct OSS
CM OPERATIONS MANAGER
� CM Operations Manager is for uploading managed objects, exporting actual configurations, import & export radio network plans, prepare & delete plans, pre-activate & activate planned configurations to network.
Select CM Operations Manager under
Configuration Categories
CM EDITOR
� CM Editor is used to view actual radio network configuration, create, modify & delete plans, create templates, create managed objects, edit & mass edit parameter values of managed objects.
CM ANALYSER
� CM Analyser can be used to perform checks or discrepancies on actual or planned radio network parameters to ensure parametersare defined according to consistency rules
REPORTING SUITES
� Reporting Suites provide ready-made reports for analyzing the performance of the network. The reports are based on collected PM data and Nokia-defined KPIs and provide information on traffic, mobility, resources, signaling, security, subscriber, quality, charging, and Quality of Service.
REPORTING SUITES
1
2
3
� Select needed RAN report
Sample RAN report
Reporting Suites Sample
R
A
N
R
E
P
O
R
T
S
REPORT BUILDER
� Report Builder is a reporting tool for post-processing & visualization of data. It is used to for customized reporting & has been designed for creating and running a wide range of various reports on the performance data. The results are presented in graphical & excelformat.
Reports are represented in both
excel file and graphical views.
Report Builder Output
APPLICATION LAUNCHER
RNW MEASUREMENT MANAGEMENT
� It means that measurement is activated
RNW ONLINE MONITORING
� RNW Online
Monitoring is used
to view Cell Load
� Click Start to view counters
on a cell
CALL FLOW
AMR MOCMS BTS CS_CNRNC
RRC:RRC CONNECTION REQUEST
NBAP:RADIO LINK SETUP REQUEST
NBAP:RADIO LINK SETUP RESPONSE
RRC:RRC CONNECTION SETUP
NBAP:SYNCHRONIZATION INDICATION
RRC:CONNECTION SETUP COMPLETE
RRC:INITIAL DIRECT TRANSFER (CM Service Request)
RANAP:INITIAL UE MESSAGE(CM Service Request)
RANAP:RAB ASSIGNMENT REQUEST
Call established
L1 synchronisation
AAL2SIG: ERQ
AAL2SIG: ECF
RANAP: DIRECT TRANSFER
(CM Service Accept)RRC: DOWNLINK DIRECT TRANSFER (CM Service Accept)
RRC: UPLINK DIRECT TRANSFER (Setup)RANAP: DIRECT TRANSFER
(Setup)
RANAP: DIRECT TRANSFER(Call Proceeding)
RRC: DOWNLINK DIRECT TRANSFER (Call Proceeding)
NBAP:RADIO LINK RECONFIGURATION PREPARE
NBAP:RADIO LINK RECONFIGURATION READY
AAL2SIG: ERQ
AAL2SIG: ECFAAL2SIG: ERQ
AAL2SIG: ECF
NBAP:RADIO LINK RECONFIGURATION COMMIT
RRC: RADIO BEARER SETUP
RRC: RADIO BEARER SETUP COMPLETERANAP:RAB ASSIGNMENT RESPONSE
RANAP: DIRECT TRANSFER
(Alerting)RRC: DOWNLINK DIRECT TRANSFER (Alerting)
RRC: UPLINK DIRECT TRANSFER (Connect)RANAP: DIRECT TRANSFER
(Connect)
(Connect Acknowledge)RRC: DOWNLINK DIRECT TRANSFER (Connect Acknowledge)RANAP: DIRECT TRANSFER
AMR MTCMS BTS CS_CNRNC
RRC:RRC CONNECTION REQUEST
NBAP:RADIO LINK SETUP REQUEST
NBAP:RADIO LINK SETUP RESPONSE
RRC:RRC CONNECTION SETUP
NBAP:SYNCHRONIZATION INDICATION
RRC:CONNECTION SETUP COMPLETE
RRC:INITIAL DIRECT TRANSFER (Paging response)
RANAP:INITIAL UE MESSAGE(Paging response)
RANAP:RAB ASSIGNMENT REQUEST
Call established
L1 synchronisation
AAL2SIG: ERQ
AAL2SIG: ECF
RRC: DOWNLINK DIRECT TRANSFER (Setup)
RRC: UPLINK DIRECT TRANSFER (Call confirmed)
RANAP: DIRECT TRANSFER
(Setup)
RANAP: DIRECT TRANSFER(Call confirmed)
NBAP:RADIO LINK RECONFIGURATION PREPARE
NBAP:RADIO LINK RECONFIGURATION READY
AAL2SIG: ERQ
AAL2SIG: ECF
AAL2SIG: ERQ
AAL2SIG: ECF
NBAP:RADIO LINK RECONFIGURATION COMMIT
RRC: RADIO BEARER SETUP
RRC: RADIO BEARER SETUP COMPLETE
RANAP:RAB ASSIGNMENT RESPONSE
RANAP: DIRECT TRANSFER(Alerting)
RRC: UPLINK DIRECT TRANSFER (Alerting)
RRC: DOWNLINK DIRECT TRANSFER (Connect)RANAP: DIRECT TRANSFER
(Connect)
(Connect Acknowledge)
RRC: UPLINK DIRECT TRANSFER (Connect Acknowledge)
RANAP: DIRECT TRANSFER
RANAP:PAGINGRRC:PAGING TYPE 1
PS DATAMS BTS PS_CNRNC
RRC:RRC CONNECTION REQUEST
NBAP:RADIO LINK SETUP REQUEST
NBAP:RADIO LINK SETUP RESPONSE
RRC:RRC CONNECTION SETUP
NBAP:SYNCHRONIZATION INDICATION
RRC:CONNECTION SETUP COMPLETE
RRC:INITIAL DIRECT TRANSFER (Attach Request)
RANAP:INITIAL UE MESSAGE(Attach Request)
RANAP:RAB ASSIGNMENT REQUEST
Uplink and downlink data transfer
L1 synchronisation
AAL2SIG: ERQ
AAL2SIG: ECF
RANAP: DIRECT TRANSFER
(Attach Accept)RRC: DOWNLINK DIRECT TRANSFER (Attach Accept)
RRC: UPLINK DIRECT TRANSFER (SM:Activate PDP Context request)
RANAP: DIRECT TRANSFER
(SM: Activate PDP Context request)
RANAP: DIRECT TRANSFER(SM: Activate PDP Context accept)
RRC: DOWNLINK DIRECT TRANSFER (SM: Activate PDP Context Accept)
NBAP:RADIO LINK RECONFIGURATION PREPARE
NBAP:RADIO LINK RECONFIGURATION READY
AAL2SIG: ERQ
AAL2SIG: ECF
NBAP:RADIO LINK RECONFIGURATION COMMIT
RRC: RADIO BEARER SETUP
RRC: RADIO BEARER SETUP COMPLETE
RANAP:RAB ASSIGNMENT RESPONSE
RRC: TRANSPORT CHANNEL RECONFIGURATION
RRC: MEASUREMENT REPORT
RRC: TRANSPORT CHANNEL RECONFIGURATION COMPLETE
RRC: DOWNLINK DIRECT TRANSFER (Attach Complete)
RANAP: DIRECT TRANSFER(Attach Complete)
SHO
UE BTS RNC
Handover tresholds fulfilled (MEHO)- Event 1A is triggered
RRC: Active Set Update Request
RRC: Measurement Report
NBAP: Radio Link Addition Response
NBAP: Radio Link Addition Request
RRC: Active Set Update Complete
UE BTS RNC
Handover tresholds fulfilled (MEHO)- Event 1B is triggered
RRC: Active Set Update Request
RRC Measurement Report
RRC: Active Set Update Complete
NBAP: Radio Link Deletion Request
NBAP: Radio Link Deletion Response
EVENT 1a EVENT 1b
SHOEVENT 1c
UE BTS RNC
Handover tresholds fulfilled (MEHO)- Event 1C is triggered
RRC: Active Set Update Request
RRC: Measurement Report
NBAP:Radio Link Addition Response
NBAP: Radio Link Addition Request
RRC: Active Set Update Complete
NBAP: Radio Link Deletion Request
NBAP: Radio Link Deletion Response
ISHO (VOICE 3G -> 2G)
ISHO (PS 3G -> 2G)
THANK YOU