WF on LTE-NR DC with UL coexistence 3GPP TSG RAN WG1 meeting #90 R1- 1714953 Prague, Czech Republic, 21 – 25 August, 2017 Agenda item: 6.1.6 WF on LTE-NR DC with UL coexistence Huawei, HiSilicon, Deutsche Telekom, China Unicom, China Telecom

Background Operators whose request is included in the frequency range The band combination NR-LTE uplink sharing have been agreed in RAN4 （R4-1704411） Frequency ranges for NR Operators whose request is included in the frequency range 1710-1785MHz (UL)/3.3-4.2 GHz*(DL&UL) (1800MHz) China Telecom, China Unicom, CMCC, Deutsche Telekom 832-862MHz (UL)/3.3-4.2 GHz*(DL&UL) (800MHz) Orange, Telefonica, Etisalat, Deutsche Telekom 880-915MHz (UL)/3.3-4.2 GHz*(DL&UL) (900MHz) CMCC 703-748MHz (UL)/3.3-4.2 GHz* (DL&UL) (700MHz) Orange, Telefonica, Etisalat *: The exact frequency range around 3.5GHz may be revised during R15 NR WI Note: The LTE-NR dual connectivity UE RF requirements with the same frequency ranges can be reused as the starting point for the above NR paired band.

Background NSA deployment scenarios R1-1711817 WF on LTE/NR DC deployment scenarios to extend NR UL coverage Orange, Deutsche Telekom, Ericsson, China Unicom, OPPO, Huawei, China Telecom, Nokia, ZTE Scenario #1 : DC LTE @ Low Frequency (LF) + NR @ 3.5G Concept: LTE PUSCH/PUCCH LF, NR PUCCH 3.5G, NR PUSCH 3.5G configurable Scenario #2: DC LTE@LF + NR@3.5G + NR@LF SUL with UL sharing NR and LTE are collocated Concept: LTE band uses LTE/NR UL sharing Note: this scenario is potentially beneficial for reducing latency Scenario #3: DC LTE@LF1 + NR@ multiple bands (e.g. LF2 and 3.5G) Concept: NR CA from 3.5G to LF2 Agreements: RAN1 should consider the following scenarios as listed in R1-1711817 in the future Rel-15 work especially in terms of UL coverage Scenario 1 Scenario 2 where UL sharing is from network perspective FFS where UL sharing from UE perspective Aim to conclude in the next meeting; if no consensus, consider sending an LS to RANP for clarification Scenario 3

LTE/NR Dual Connectivity with UL Sharing Scenario #2 assumes a single LTE carrier in a single LTE band RAN1 agreed to support scenario #2 from network perspective, in order to provide better coverage (and latency) for the UL of NR UEs. In a realistic deployment there is just one CN, i.e. for option 3 the CN is the EPC. Therefore, no standalone NR UE can operate in that network. Thus the only NR UE that can operate NR UL in 1.8 GHz is a LTE-NR DC UE, thus this UE also operates the LTE UL in 1.8 GHz. Conclusion: in scenario #2 with a single LTE carrier in a single LTE band, support of UL sharing from network perspective means that a UE has to be capable of simultaneous operation of LTE UL and NR UL on the shared UL frequency.

Multiple LTE bands for LTE-NR DC with UL sharing Scenario #2 may be extended to multiple LTE carriers in a multiple LTE bands UE Configuration #1 UE Configuration #2 NR DL/UL NR DL/UL 3.5GHz LTE DL LTE DL 1.8GHz LTE 20MHz NR UL LTE UL LTE DL LTE DL 0.8 GHz LTE 10MHz LTE UL NR UL Conclusion: in scenario #2 with multiple LTE bands and LTE CA + LTE/NR DC, support of UL sharing from network perspective can be achieved even if UEs are not capable of simultaneous operation of LTE UL and NR UL on the shared UL frequency.

Proposal Conclusion or Observation #1 In LTE/NR DC deployment scenario #2 of R1-1711817 with a single LTE carrier in a single LTE band, support of UL sharing from network perspective with LTE Pcell means that a UE has to be capable of simultaneous operation of LTE UL and NR UL on the shared UL frequency, e.g. sharing in a TDM manner It is RAN4 decision which band combination(s) are supported. Conclusion or Observation #2 In LTE/NR DC deployment scenario #2 of R1-1711817 with multiple LTE carriers and LTE DL CA + LTE/NR DC, support of UL sharing from network perspective can be achieved with even if UEs that are not capable of simultaneous operation of LTE UL and NR UL on the shared UL frequency, if multiple shared UL carriers are available from network perspective.