Telecom Requirements for Time and Frequency ... - GPS.gov

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Excerpts from:Deutsche TelekomTime/Phase Synchronization Requirementsfor LTE-Advanced Wireless Systems includingCoMPDeutsche Telekom at WSTS 2011Helmut Imlau, Heinz Droste
CoMP introduction (1/2)CoMP = Coordinated Multi-Point Transmission and Reception, with two categories:(1) Coherent Joint Processing (JP), aka “Network MIMO” and(2) Coordinated Scheduling (CS).CoMP - Joint Processing Transmission and/or reception from/togeographically separated antennas.Traffic and control data transferbetween eNB via X2 interface (logicalinterface).eNBSectorsSiteUser terminalSee Figure:Idea of JP is communication between oneuser terminaland several eNB sectors at the same time.eNBX2eNB10.05.2011– LTE-A Time and phase sync requirements –Deutsche Telekom at WSTS 201129
Page 1 and 2: Telecom Requirements for Timeand Fr
Page 3 and 4: Excerpts from WSTS• The NIST-ATIS
Page 5 and 6: Telecom Receivers are GenerallyStat
Page 7 and 8: Packet-Based Networks• The physic
Page 9 and 10: Timing Technology: Phase• Alignme
Page 11 and 12: GPS/GNSS meets Stratum 1 Requiremen
Page 13 and 14: Time Synchronization via PTP• The
Page 15 and 16: Current Frequency Sync Requirements
Page 17 and 18: Requirements from ITU-T Q13/15Curre
Page 19 and 20: Excerpts from:Mobile standards & sy
Page 21 and 22: Mobile applications andSynchronizat
Page 23 and 24: CDMA 2000 SynchronizationRequiremen
Page 25 and 26: WCDMA Base Station TX Frequency Err
Page 27: LTE-TDD Phase SynchronizationRequir
Page 31 and 32: CoMP-JP time/phase synchronization
Page 33 and 34: SummaryTo operate CoMP Joint Proces
Page 35 and 36: Sync from GNSS at ~100 ns• At a f

Telecom Requirements for Time and Frequency ... - GPS.gov

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