`
`PCT/SG2019/050582
`
`CLAIMS
`
`Whatis claimedis:
`
`1. A terminal comprising:
`
`a receiver, which in operation, receives one or more discovery reference signal (DRS)
`
`transmitted by a base station within a channel occupancy time (COT)starting at a possible
`
`starting position that is not aligned with half a slot boundary; and
`
`circuitry, which in operation, determines frame timing in response to receiving the one or
`
`more DRS.
`
`2. The terminal of claim 1, wherein more than one possible starting positions per half a slot are
`
`determined for a subcarrier spacing (SCS).
`
`3. The terminal of claim 1, wherein the numberof possible starting positions per half a slot
`
`varies for different SCSs.
`
`4. The terminal of claim 3, wherein the numberof possible starting positions per half a slot for a
`
`smaller SCS is greater than that for a larger SCS.
`
`5. The terminal of claim 1, wherein each of the one or more DRS includesa first signaling for
`
`indicating a synchronization signal block (SSB) index and a secondsignaling for indicating a
`
`timing offset.
`
`6. The terminal of claim 1, wherein each of the one or more DRSincludesa signaling for
`
`indicating a candidate SSB position index.
`
`7. The terminal of claim 1, wherein each of the one or more DRSincludes a signaling for
`
`indicating a starting position index (SPD.
`
`25
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`
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`WO 2020/176035
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`PCT/SG2019/050582
`
`8. The terminal of claim 1, wherein a time domain position of the one or more DRSis selected
`
`from one or more additional candidate positions corresponding to the possible starting position.
`
`9. The terminal of claim 8, wherein a starting index for the one or more additional candidate
`
`positions corresponding to the possible starting position is an integer multiple of X, where X isa
`
`maximum number of the one or more DRStransmitted within a DRS transmission window.
`
`10. A base station, comprising:
`
`circuitry, which in operation, generates one or more discovery reference signal (DRS):
`
`and
`
`a transmitter, which in operation, transmits the one or more DRSto a terminal within a
`
`channel occupancy time (COT)starting at a possible starting location that is not aligned with half
`
`a slot boundary.
`
`11. The basestation of claim 10, wherein the numberof possible starting positions per half a slot
`
`for a smaller synchronization signal block (SSB) subcarrier spacing (SCS) is greater than that for
`
`a larger SSB SCS.
`
`12. The base station of claim 10, wherein the transmitter transmits a reservation signal till a next
`
`half a slot boundary prior to the transmission of the one or more DRS.
`
`13. A communication method comprising:
`
`obtaining, at a base station, a channel occupancy time (COT)starting at a possible
`
`starting position that is not aligned with half a slot boundary;
`
`generating, at the base station, one or more discovery reference signal (DRS) at a
`
`beginning of the COT; and
`
`transmitting, from the base station, the one or more DRSto a terminal.
`
`14. The communication method according to claim 13, comprising:
`
`receiving, at a terminal, the one or more DRStransmitted by the base station; and
`
`determining, at the terminal, frame timing in response to receiving the one or more DRS.
`
`26
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`
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`WO 2020/176035
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`PCT/SG2019/050582
`
`15. The communication method according to claim 13, comprising:
`
`selecting, at the base station, a time domain position of the one or more DRS from one or
`
`more additional candidate positions corresponding to the possible starting position.
`
`27
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`
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