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Crown Castle LLC Proprietary and Confidential Copyright © 2012 Crown Castle LLC. All Rights Reserved.

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Presentation on theme: "Crown Castle LLC Proprietary and Confidential Copyright © 2012 Crown Castle LLC. All Rights Reserved."— Presentation transcript:

1 Crown Castle LLC Proprietary and Confidential Copyright © 2012 Crown Castle LLC. All Rights Reserved.

2 Vaught Hemingway Stadium Bleachers AT&T UMTS PCS

3 Initial CW Testing Injected CW signal in each sector to collect data defining sectors coverage Based 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 antennas

4 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 design Macro sites have higher coverage than DAS Throughput is low even outside the stadium Cables with high loss are used between the RAU and antennas Observations

5 Benchmark before (10/24/2012)

6 First Set of Changes Removing all CSI Panel Antennas that is causing sectors’ bleeding and higher SHO.

7 First Set of Changes-Continue XCAP Azimuth and Tilting adjustments

8 Power, Gain and Attenuation Adjustments First Set of Changes-Continue Stadium Zone/ Sector UMTS 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 GainUL Gain DL Power expected at output of RAU (Before antenna & its cabling) dbm dB dBm dB dBm

9 After 1 st Set of Changes 5 dB Additional Gain + Removing CSI Panel Antennas + XCAP Antenna Azimuth and Tilting Adjustments SHO Improved by 50%

10 Second Set of Changes -Relocate 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 dB -Lower sectors 2, 3, 4 &5 gain from 5 to 3 dB

11 After 2 nd set of changes to sectors 5, 6 & 7 7 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.

12 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, & 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, & 4

13 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 work

14 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 RAU

15 EcIo after optimization-11/1/2012

16 EcIo+PSC after optimization-11/1/2012

17 Dominant PSC after optimization-11/1/2012

18 Tx Power after optimization-11/1/2012

19 DL Throughput after optimization-11/1/2012 DL Throughput kbps

20 Current outdoor DL Throughput from macro sites DL Throughput kbps While DAS is turned off

21 Current outdoor SHO in macro sites While DAS is turned off

22 Vaught Hemingway Stadium Lower Level Suites AT&T UMTS PCS

23 Recommendation! There are 2 options to reduce the SHO in this area and create dominant server: 1.Using directional antennas instead of the Omni antennas 2.If 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 performance

24 Coverage – Lower level suites No optimization has been done

25 EcIo – Lower level suites No optimization has been done

26 SHO – Lower level suites No optimization has been done

27 DL Throughput – Lower level suites DL Throughput kbps No optimization has been done

28 Vaught Hemingway Stadium Upper Level Suites AT&T UMTS PCS

29 Coverage – Upper level suites No optimization has been done

30 EcIo – Upper level suites No optimization has been done

31 Tx Power – Upper level suites No optimization has been done

32 DL Throughput – Upper level suites DL Throughput kbps No optimization has been done

33 Vaught Hemingway Stadium Under Bleachers AT&T UMTS PCS

34 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 area

35 Coverage – Under-bleachers area No optimization has been done

36 EcIo – Under-bleachers area No optimization has been done

37 Tx Power – Under-bleachers area No optimization has been done

38 DL Throught – Under-bleachers area DL Throughput kbps No optimization has been done

39 Next Steps Finish 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 issues Replace all “142” high-loss cables with ½” plenum cables between the RAU and antennas Verify 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


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