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Interference Analysis and Future Considerations for LTE and Government Systems

This report presents conclusions from the Working Group 5 regarding interference analysis between LTE and government systems, highlighting that sharing is not feasible for aeronautical mobile telemetry (AMT), small unmanned aerial systems (SUAS), and air combat training systems (ACTS). Significant separation distances, ranging from 285 to 415 kilometers, are necessary to mitigate interference, which may hinder LTE deployment in major commercial markets. The report identifies potential future analysis options, including time-based and geographic-based sharing methods, to address interference challenges.

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Interference Analysis and Future Considerations for LTE and Government Systems

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Presentation Transcript

  1. Working Group 5 Draft Report On Sub Working Group Conclusions

  2. WG 5 Approach • Performed interference analysis in both direction • Government systems to LTE • LTE to Government Systems • Determined separation distance for federal operations and LTE systems

  3. Sub Working Group Aeronautical Mobile Telemetry (AMT) Conclusions: • Sharing is not feasible between AMT and LTE • Range of separation distance requirements would severely limit LTE deployment in top 100 commercial markets • Changes to WG5 agreed assumptions may change the range of required protection distances and in turn may render different conclusions • Identified Possible Future Analysis

  4. Sub Working Group Small Unmanned Aerial Systems Conclusions: • Sharing does not appear feasible, based on the analysis result identifying large separation distance requirements • Industry view at this time is conclusion cannot be assessed due to insufficient Publicly Releasable Data • Analysis Focused on Protection Distances • UE to SUAS: beyond 300 KMs • SUAS to Base Stations: at least 285 KMs • Identified Possible Future Analysis

  5. Sub Working Group Air Combat Training Systems Conclusions: • Sharing would likely impose unacceptable operational or economic constraints on ACTS operators or wireless operators. • UE to ACTS: 325-375 KM distances • ACTS to Base Stations: 285-415 KM distances • Identified Possible Future Analysis, including some sharing techniques

  6. Sub Working Group Precision Guided Munitions/Other Airborne Systems Conclusions: • 8 Systems Identified • PGM, TactiLink, VORTEX, ROVER, DRAGOON, LITENING/Sniper: • Relocation to comparable spectrum • JTRS AMF: • Protection Zones at selected priority areas for entire band/elsewhere 1780-1850 MHz • TTNT (exc Navy): • Protect DOD priority sites for entire band 1755-1850 MHz

  7. Future Analysis Options Identified • Time-based & Geographic-based Sharing • Off-tuning of LTE Base Stations • Notching specific LTE channels at selected locations • Alternate interference threshold based on desired signal level desired • Possible effects of clutter/terrain • UE Antenna Height

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