SE19 review, 27 April 2000 - 1 TTPCom, Harris Systems Limited, Wavtrace Inc. REVIEW OF SE 19 RECOMMENDATIONS FOR COEXISTENCE IN 24 - 29 GHz - 2 Agenda:

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Presentation transcript:

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. REVIEW OF SE 19 RECOMMENDATIONS FOR COEXISTENCE IN GHz - 2 Agenda: Problems with technical report and recommendation discussed at last SE19 Progress since last meeting Interim meeting Possible conclusions on coexistence

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. 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

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. 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

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. 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

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. 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

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. SE19 INTERIM MEETING Objective - to agree new version of report on “The Coexistence of Two FWA Cells in the GHz band” Scheduled to be held at Reg.T.P., Mainz, Germany, May 2000 Will be based on new draft documents currently being prepared

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. 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

SE19 review, 27 April TTPCom, Harris Systems Limited, Wavtrace Inc. 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)