Vaught Hemingway Stadium Benchmark Test ATampT Crown Castle LLC Proprietary and Confidential Copyright 2012 Crown Castle LLC All Rights Reserved Vaught Hemingway Stadium Bleachers ID: 640071
Download Presentation The PPT/PDF document "University of Mississippi" is the property of its rightful owner. Permission is granted to download and print the materials on this web site for personal, non-commercial use only, and to display it on your personal computer provided you do not modify the materials and that you retain all copyright notices contained in the materials. By downloading content from our website, you accept the terms of this agreement.
Slide1
University of Mississippi
Vaught Hemingway StadiumBenchmark Test(AT&T)
Crown Castle LLC Proprietary and Confidential Copyright © 2012 Crown Castle LLC . All Rights Reserved.Slide2
Vaught Hemingway Stadium
BleachersAT&T UMTS PCSSlide3
Initial CW TestingInjected CW signal in each sector to collect data defining sectors coverageBased on the CW coverage, issues were identified due to antennas locations and the type of antennas used.
Removed all CSI panel antennas due to its poor pattern and performed azimuth and tilting chanages to the xcap antennasSlide4
The system has power limitation, and cannot support the necessary power to provide dominant server for each sector. If gain is added, the system can override at the full load.
To resolve the override issue, more RAUs need to be added to the system. One RAU per each sector. (at red arrows)
Poor antenna patens are used in the designMacro sites have higher coverage than DASThroughput is low even outside the stadiumCables with high loss are used between the RAU and antennas
ObservationsSlide5
Benchmark before (10/24/2012)Slide6
First Set of ChangesRemoving all CSI Panel Antennas that is causing sectors’ bleeding and higher SHO.Slide7
First Set of Changes-ContinueXCAP Azimuth and Tilting adjustmentsSlide8
Power, Gain and Attenuation AdjustmentsFirst Set of Changes-Continue
Stadium Zone/ SectorUMTS f1 (537) BTS output (DIN directly out of BTS)UMTS f2 (612) BTS output (DIN directly out of BTS)
CCI INTERNAL FIXED ATTENUATION (inside the box cannot be changed)
CCI internal insertion loss
CCI DL ATTN dial settings
CCI UL ATTN dial settings
f1 (537) (CCI TX OUT QMA PORT to DAS)
f2 (612) (CCI TX OUT QMA PORT to DAS)
Tx Cable Insertion Loss (CCI to Fusion Main Hubs)
Rx Cable Insertion Loss (CCI to Fusion Main Hubs)
Fusion DL Port Main Hub (f1-537)
Fusion DL Port Main Hub (f2-612)
DL Gain
UL Gain
DL Power expected at output of RAU (Before antenna & its cabling)
dbm
dbm
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm
dB
dB
dBm
1
37
41.4
20
22
0
0
5
0.6
-13.6
-13.4
-8.6
-12.8
7
12
-1.6
2
38.1
42.4
20
22
0
0
3.9
-0.4
-7.9
-7.9
-4
-8.3
2
12
-2
3
40.7
43.1
20
22
2
0
3.3
0.9
-7.3
-10.9
-4
-10
3
12
-1
4
37.7
41.6
20
22
0
0
4.3
0.4
-8
-8.4
-3.7
-8
3
7
-0.7
5
38.5
42.4
20
22
1
0
4.5
0.6
-7.8
-8.6
-3.3
-8
5
13
1.7
6
38.5
42.5
20
22
1
0
4.5
0.5
-8.5
-8.5
-4
-8
2
12
-2
7
37.9
41.55
20
22
0
0
4.1
0.45
-7.8
-8.45
-3.7
-8
1
12
-2.7
8
39
43.1
20
22
2
0
5
0.9
-13.2
-13.7
-8.2
-12.8
6
9
-2.2
9-1
37.1
49.77
20
22
0
8
4.9
0.23
-15.4
-15.23
-10.5
-15
0
0
-10.5
9-2
37.1
49.77
20
22
0
8
4.9
0.23
-15.4
-15.23
-10.5
-15
2
6
-8.5
10
36.8
43.4
20
22
0
2
5.2
0.6
-11.6
-11.9
-6.4
-11.3
4
7
-2.4Slide9
After 1
st Set of Changes
5 dB Additional Gain + Removing CSI Panel Antennas + XCAP Antenna Azimuth and Tilting Adjustments
SHO Improved by 50%Slide10
Second Set of ChangesRelocate CSI Panel Antennas to the middle of the sectors instead of the sectors edges, so we can take advantage of the antennas pattern. And close coverage gaps.
Increase sectors 6 & 7 gain from 5 to 7 dBLower sectors 2, 3, 4 &5 gain from 5 to 3 dBSlide11
After 2
nd
set of changes to sectors 5, 6 & 77 dB Additional Gain
3 dB Additional Gain
Note that the SHO degraded from 33% to 41% as a side effect of fixing converge holes resulted from the fist set of changes on 10/31 due splitters loss. The coverage holes were fixed by adjusting the sectors gain.Slide12
After 2
nd set of changes to sectors 2, 3 & 4
Note the degradation to the SHO in the area covered by sectors 2, 3 & 4 due the gain adjustment from 5 to 3 dB.
The gain should be reversed back to 5 dB or higher.
Also similar antenna additions and changes to sectors 5, 6, &7 should be applied to sectors 2, 3, & 4Slide13
Coverage after optimization-11/1/2012
Note the improvement in coverage of sectors 5,6 & 7
Coverage of sectors 2,3 & 4 still needs further workSlide14
Coverage+PSC
after optimization-11/1/2012
Notice the dominance of each sector except for few spots where it need to be addressed by increasing the antennas ERIP in these areas. Suggested solution is to add more RAUSlide15
EcIo
after optimization-11/1/2012Slide16
EcIo+PSC
after optimization-11/1/2012Slide17
Dominant PSC after optimization-11/1/2012Slide18
Tx
Power after optimization-11/1/2012Slide19
DL Throughput after optimization-11/1/2012
DL Throughput kbpsSlide20
Current outdoor DL Throughput from macro sites
DL Throughput kbps
While DAS is turned offSlide21
Current outdoor SHO in macro sites
While DAS is turned offSlide22
Vaught Hemingway Stadium
Lower Level Suites AT&T UMTS PCSSlide23
Recommendation!There are 2 options to reduce the SHO in this area and create dominant server:
Using directional antennas instead of the Omni antennasIf Omni antenna is kept, it should at least be moved inward away from sectors 4 & 5 to reduce overlap. This overlap is degrading sectors 4 & 5 performanceSlide24
Coverage – Lower level suites
No optimization has been doneSlide25
EcIo
– Lower level suites
No optimization has been doneSlide26
SHO – Lower level suites
No optimization has been doneSlide27
DL Throughput – Lower level suites
DL Throughput kbps
No optimization has been doneSlide28
Vaught Hemingway Stadium
Upper Level SuitesAT&T UMTS PCSSlide29
Coverage – Upper level suites
No optimization has been doneSlide30
EcIo
– Upper level suites
No optimization has been doneSlide31
Tx
Power – Upper level suites
No optimization has been doneSlide32
DL Throughput – Upper level suites
DL Throughput kbps
No optimization has been doneSlide33
Vaught Hemingway Stadium
Under BleachersAT&T UMTS PCSSlide34
Action Required – Relocate antennas to concrete beams that run across concourse areas. Locate antennas on beams such that they face or run with flow of pedestrian traffic. Establish back to back antenna points for better sector definition. Back to back antenna example
Recommendations for the Under-bleachers areaSlide35
Coverage – Under-bleachers area
No optimization has been doneSlide36
EcIo
– Under-bleachers area
No optimization has been doneSlide37
Tx
Power – Under-bleachers area
No optimization has been doneSlide38
DL
Throught – Under-bleachers area
DL Throughput kbps
No optimization has been doneSlide39
Next StepsFinish optimization of sectors 2, 3, 4, 5, 8, 9 and 10.
Deploy two installation crew. The first crew to implement the changes and the second crew to work with the optimization team during the testing.CW injection is needed it to verify the coverage area of newly added antennas and adjust the overlap areas.Antennas cannot be moved far from the RAU due to the power limitation of the RAU. When re-locating the antennas the RAU should be moved with the antennas.Add RAU to each sector to resolve the power limitation issuesReplace all “142” high-loss cables with ½” plenum cables between the RAU and antennasVerify power levels at the input of each antennas to match the design levels and adjust power accordingly.Once all sectors are optimized a final walk test needs to be completed