WF on DL LBT Scheme for DRS

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Presentation transcript:

WF on DL LBT Scheme for DRS 3GPP TSG-RAN WG1 Meeting #81 Fukuoka, Japan, 25th-29th May 2015 AI 6.2.4.3 Document for: Decision R1-15xxxx WF on DL LBT Scheme for DRS Huawei, HiSilicon, NEC

Proposal 1 LBT without random backoff is used for DL transmission burst containing DRS without PDSCH within the DMTC A single CCA idle slot allows the start of the DRS transmission Transmission of reservation signal between the CCA idle slot and the transmission of DRS is possible Note: eNB may check multiple CCA slots before finding one idle slot A defer period is included when applicable Further discuss the length of the CCA slot, the length of the defer period, and the energy detection threshold, or their possible ranges The ECCA counter used for LBT category 4 for the PDSCH is frozen during DL transmission burst containing DRS without PDSCH

Proposal 2 Agree on Alt2 for DRS transmissions: Subject to LBT, allow the DRS to be transmitted in at least one of different time positions within the configured DMTC More than one candidate time position can be configured within the configured DMTC