Cluster Optimization
Prepared by: Samsung
Course Name: SCFT Procedure
Course Objective
This module will enable participants to understand how to conduct Cluster Optimization Drive
Who should attend
RF / DT engineers, Riggers
Morning Session (10:30am to 1:30pm)
Lun
ch b
reak
Afternoon Session (2:30pm to 6pm)
Day 1
•XCAL Demonstration
• Hands on exercises
Good to know
Keep your mobile phone in the silent mode during the session
Need to sign attendance sheet at the start and end of each day
At the end of each training post test will be conducted
Stick to break timings
Your valuable feedback will be taken at the end to enhance training experience
For logistics support contact the co-ordinator
Agenda
Introduction
Cluster Optimization Test Entrance Criteria
High level process
Drive Route Selection
Test Procedure
Types of tests
Checklist for cluster optimization
Cluster System Acceptance Test
RF Design Validation
Handover Test
Retainability Test
Accessibility Test
VoLTE Quality
Introduction to Cluster Optimization
Cluster Optimization Test Entrance Criteria Cluster Definition Minimum of 20 to 30 eNB’s
Contiguous coverage
Can cross TA boundaries
Test entrance criteria At least 80% of the eNB’s in the
test cluster shall have passed SCFT and shall have compliance with EMF norms
SCFT and EMF compliance report for each eNB for the test cluster has to be verified
Any changes to the eNB physical configuration required for EMF compliance shall be updated in the cluster database
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Cluster Optimization High-level Process
Drive 1
• First cluster drive after 80 % of the sites pass SCFT & EMF
Optimization
• Post-analysis changes to network
Drive 2
• Second Drive Test result will be compared with the first Drive Test for worst areas by measuring entire signal environment after change in System Parameters and adjustments of Antenna
Drive Route Selection
UE should be served by all sectors of every eNB in the cluster
Include highways, major and minor roads in the cluster
Route should represent potential subscriber usage locations
Should not leave the designed coverage area for the cluster
First and second drive routes should remain identical
Conditions (e.g. UE position) should be identical between drives
Do not cross 40 kmph
SCFT + Cluster Drive Case
Suppose an eNB comes on-air after the rest of the cluster
For that site, SCFT & Cluster optimization drive test should be done till first tier neighbors for the site
Drive Route for late on-air site
B B
1. Drive route for Cluster when Site B is not on Air
2. Drive route for Sub Cluster after Site B is on Air
Test Procedure
Tests to be conducted
FTP Downlink Long Call
FTP Uplink Long Call
VoLTE Long Call
VoLTE Short Call 4 UE’s : 1 Master, 3 Slaves
FTP Downlink Long Call Ensure that OCNS is enabled for all eNBs in the cluster with 76% downlink load Ensure that the UE is successfully attached to the LTE network Select the appropriate UE and download the FTP DL Scenario from FMS Start the Autocall test. FTP download uses a single file with the highest possible compression and file size of 8GB. (Attach to detach - 60 min & 10 Sec Idle time) Ensure that the log files are being captured Start traversing around the pre-defined drive route at 30-40 Kmph, continuing the FTP download and reinitiating in case of call drop At the end of the drive route stop the logging and ensure that the log files are uploaded
FTP Uplink Long Call Ensure that OCNS is enabled for all eNBs in the cluster with 76% downlink load Ensure that the UE is successfully attached to the LTE network Select the appropriate UE and download the FTP UL Scenario from FMS Start the Autocall test. FTP UL uses a single file of highest possible compression and file size of 1GB. ( Attach to detach - 60 min & 10 Sec Idle time) Ensure that the log files are being captured Start traversing around the pre-defined drive route at 30-40 Kmph, continuing the FTP upload and reinitiating in case of call drop At the end of the drive route stop the logging and ensure that the log files are uploaded
VoLTE Long Call Ensure that OCNS is enabled for all eNBs in the cluster with 76% downlink load
Ensure that the UE is successfully attached to the LTE network and successfully registered for VoLTE service
Select the appropriate UE and download the VoLTE Long call Scenario from FMS
Start the Autocall test. Ensure that the log files are being captured
Start traversing around the pre-defined drive route at 30-40 Kmph, continuing the long call and reinitiating in case of call drop
At the end of the drive route stop the logging and ensure that the log files are uploaded
VoLTE Short Call Ensure that OCNS is enabled for all eNBs in the cluster with 76% downlink load Ensure that the UE is successfully attached to the LTE network and successfully registered for VoLTE service Select the appropriate UE and download the VoLTE Short call Scenario from FMS Start the Autocall test. Ensure that the log files are being captured Start traversing around the pre-defined drive route at 30-40 Kmph, continuing the short calls At the end of the drive route stop the logging and ensure that the log files are uploaded
Checklist for Cluster Optimization
Items Parameter Action
Test Call FTP Test Call Upload & Download Before starting drive test make a test call
Ping Google server Ping from command prompt Before starting drive test try ping test
OCNS Loading Loading effect 76% in the downlink Before starting drive test
Site Coverage Analysis of RSRP,SINR plot, PCI plot Optimization suggestions will be given after
post processing of 1st drive test
Sector Overshooting
1. Analysis based on each sector coverage area and handover till adjacent cluster boundary 2.SCFT report should be considered for reference
Optimization suggestions should be given and which will be implemented after 1st drive test in Cluster optimization
Coverage overlapping
Analysis based on each sector coverage area using PCI plot of serving cell
Optimization suggestions should be given to reduce coverage overlapping and which will be implemented in after 1st drive test in Cluster optimization
Accessibility Attach success rate, RACH success rate, Tracking area update success rate
KPI analysis w.r.t benchmark and optimization after 1st drive test
Quality check
Analysis for weak DL & UL throughput areas. Analysis based on interference, overlapping, Handoff issues, SINR, hardware issues etc
Optimization suggestion should be given to improve weak throughput areas
Mobility/Retainability Handoff, call drop Specific issues for Handoff, call drops should
be analyzed and optimized accordingly
Worst Area Analysis for the worst area for Throughput, SINR, Low coverage etc
Optimization suggestion should be given to improve worst areas
Cluster System Acceptance Tests
Cluster System Acceptance Tests
RF Design Validation
Handover
Retainability
Accessibility
VoLTE Quality
Index KPI Type of Call Target Value No. of UE's
1 RSRP Coverage per
Morphology Downlink data long >95% 1
2 No. of Overlapping Server
within 5dB, < 3 Servers Downlink data long > 90% 1
3 No. of Overlapping Server
within 5dB, < 2 Servers Downlink data long > 60% 1
4 DL Throughput > 2Mbps Downlink data long > 95% 1
5 Average DL Throughput Downlink data long > 14.5M 1
6 UL Throughput > 256kbps Uplink data long > 95% 1
7 Average UL Throughput
(Mbps) Uplink data long > 2.5M 1
[JR1]Samsung modified table as per test case agreement between RJIL & Samsung
RF Design Validation Tests
Following test cases shall be conducted & will be mandatory for pass/fail criteria
RSRP by Morphology
Parameter Morphology Criteria
RSRP
Dense Urban > -107dBm for 95% of
samples
Medium Urban > -110dBm for 95% of
samples
SubUrban > -113dBm for 95% of
samples
Rural > -116dBm for 95% of
samples
Handover Test
Index KPI Type of Call Target Value No. of UE's
11 Handover Success Rate
Downlink data
long + Uplink data
long + VoLTE long
> 98% 3
12
Handover Interruption
Time
< 50ms + UE Switching
Time
Downlink data
long + Uplink data
long + VoLTE long
> 95% 3
Following test cases shall be conducted & will be mandatory for pass/fail criteria
Retainability Test
Index KPI Type of Call Target Value No. of UE's
13 Call Drop Rate*
Downlink data
long + Uplink data
long + VoLTE long
TBD 3
Following test cases shall be conducted & will be mandatory for pass/fail criteria c
Accessibility Test
Index KPI Type of Call Target Value No. of UE's
14 RACH Success Rate VoLTE Short* TBD 1
15 Attach Success Rate VoLTE Short* TBD 1
16 Detach Success Rate VoLTE Short* TBD 1
17 VoLTE Attach Time < 3.5
sec VoLTE Short* TBD 1
Following test cases shall be conducted & will be mandatory for pass/fail criteria
VoLTE Quality Test
Index KPI Type of Call Target Value No. of UE's
19 RTP Packet Loss and
Discard Rate VoLTE Long* TBD 1
20 e2e one way delay <
100ms VoLTE Long* TBD 1
21 Packet Delay Variation
(Jitter) < 40ms VoLTE Long* TBD 1
Following test cases shall be conducted & will be mandatory for pass/fail criteria
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