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Team #1 Sai Gavva, Lavanya Gopal, Prachee Daithankar, Saman Samadian

Indoor Deployment of Distributed Antenna System (DAS) for Public Safety LTE. Team #1 Sai Gavva, Lavanya Gopal, Prachee Daithankar, Saman Samadian Faculty Advisor : Dr. Ken Baker Industry Advisor: Dr. Bob Johnk. A Better Network !. Public Safety needs: Next generation solution

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Team #1 Sai Gavva, Lavanya Gopal, Prachee Daithankar, Saman Samadian

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  1. Indoor Deployment of Distributed Antenna System (DAS) for Public Safety LTE Team #1 Sai Gavva, Lavanya Gopal, Prachee Daithankar, Saman Samadian Faculty Advisor : Dr. Ken Baker Industry Advisor: Dr. Bob Johnk

  2. A Better Network ! • Public Safety needs: • Next generation solution • Wireless communication network inside buildings with • Video streaming • Good quality audio • Messaging- SMS, MMS

  3. Prior to this capstone… • 2011: The FCC allocated • 758-768/788-798 MHz band • for a Public Safety network. • 2014: Aviat Networks completed LTE evaluation at PSCR’s test bed in Boulder, CO • NOVELTY: Indoor DAS fed by a small cell for PS networks

  4. What we’re about.. Research Problem: Obtaining an optimal solution for in-building coverage and network performance of public safety 700 MHz LTE signal with a DAS • Sub-problems: • In-building DAS connected to small cell • Discrete antennas connected to small cell • Outdoor Cell-on-Wheels (COW)

  5. #1: In-building DAS + small cell Phase I

  6. #1: In-building DAS + small cell Phase II Testing Installation

  7. #2: Discrete antennas + small cell • Deployment and data acquisition using JDSU kit • Test equipment(DLC1B40): • small cell • 2 commercial-off-the-shelf (COTS) antennas • Power feed: 5W

  8. #3: Outdoor Cell-on-Wheels (COW) • Deployment and data acquisition similar to #2 • Test Equipment: • Backhaul: Microwave link to Green Mountain site • Single-sector cellular panel antenna • Power feed: 40 W

  9. TESTS • Walk Tests – • Level 1B UDP Uplink • Level 1B UDP Downlink • Level 1B TCP Uplink • Level 1B TCP Downlink • Level 1 TCP Uplink • Level 1 TCP Downlink • Key Performance Indicators (KPI) DLC1B DLC 1

  10. RESULTS- DL Throughput

  11. RESULTS- UL Throughput

  12. RESULTS- UE Transmit Power

  13. RESULTS-CINR

  14. RESULTS- MIMO Rank

  15. RESULTS- Overview TCP Downlink for DLC Level 1

  16. CONCLUSION • Macrocell: Poor performance • COW: Mobility but outdoor + moderate performance • Discrete: Indoor + good performance • DAS: Indoor + best performance • Merits of In-building DAS with MIMO • High uplink/downlink throughput • Good signal strength & quality • Low power feed • Reduced multipath fading effect with MIMO

  17. FUTURE SCOPE • Future research possibilities • Multi-floor DAS design for Public Safety • Different Antenna technology, e.g. smart antenna • Economic Tradeoff

  18. CREDITS & THANKS • Dr. Ken Baker • Dr. Bob Johnk and PSCR team • Dr. David Reed Questions

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