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REVIEW OF SE 19 RECOMMENDATIONS FOR COEXISTENCE IN 24 - 29 GHz - 2

REVIEW OF SE 19 RECOMMENDATIONS FOR COEXISTENCE IN 24 - 29 GHz - 2. Agenda: Problems with technical report and recommendation discussed at last SE19 Progress since last meeting Interim meeting Possible conclusions on coexistence. PROBLEMS WITH SE19 REPORT METHODOLOGY. GUARD BANDS

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REVIEW OF SE 19 RECOMMENDATIONS FOR COEXISTENCE IN 24 - 29 GHz - 2

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  1. REVIEW OF SE 19 RECOMMENDATIONS FOR COEXISTENCE IN 24 - 29 GHz - 2 Agenda: • Problems with technical report and recommendation discussed at last SE19 • Progress since last meeting • Interim meeting • Possible conclusions on coexistence

  2. PROBLEMS WITH SE19 REPORT METHODOLOGY GUARD BANDS • ISOP analysis incorrect • wrong geometry • inappropriate measure - depends on operator market strategy • gives average not worst case probability • TS-TS analysis incorrect - very pessimistic • Two channel guard band might be needed, for FDD or TDD systems, depending on interference criterion (1% ISOP) • But ISOP not a very useful criterion

  3. PROBLEMS WITH SE19 REPORT METHODOLOGY COORDINATION DISTANCE • ISOP analysis of uplink interference incorrect, and optimistic • TS - TS interference analysis questionable • TDD CS - CS analysis ignores power control, therefore pessimistic • Coordination distance of 33 km between service area boundaries appears reasonable conclusion

  4. PROBLEMS WITH SE19 REPORT GENERAL • No simple criteria without severely constraining technology choice, and potentially wasting spectrum through large guard bands • Areas affcted by adjacent block interference are small, and easily predictable using cell planning system

  5. PROGRESS SINCE LAST SE19 MEETING • TS - TS analysis complete • This relevant for coexistence between TDD systems, and between TDD and FDD systems • Requires Monte-Carlo approach to quantify • Shown not to be a limiting issue on either guard bands or coordination distances

  6. SE19 INTERIM MEETING • Objective - to agree new version of report on “The Coexistence of Two FWA Cells in the 24.5 - 29.5 GHz band” • Scheduled to be held at Reg.T.P., Mainz, Germany, 15 - 16 May 2000 • Will be based on new draft documents currently being prepared

  7. POSSIBLE CONCLUSIONS ON COEXISTENCE - 1 GUARD BANDS • Impossible to guarantee coexistence between any system types with reasonable guard band • Areas where interference might occur highly predictable given knowledge of system deployment • Operator could use “internal” guard band (but lose capacity) or deal with potential interference through cell planning tool • Regulator may allocate “comfort” guard bands but will not guarantee no interference

  8. POSSIBLE CONCLUSIONS ON COEXISTENCE - 2 COORDINATION DISTANCE • 33 km between service area boundaries appears to be adequate • Smaller separation may actually be adequate because of terrain screening (Aegis report)

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