Transmission timing in full-duplex systems
Apparatuses and methods for transmission timing in full-duplex systems. A method for receiving a downlink (DL) signal or channel associated with a reception timing procedure includes receiving first information for a receive timing adjustment value and second information for a condition. The method further includes determining a DL reference timing and whether the condition is valid for reception in a slot. The method further includes receiving the DL signal or channel in the slot based on the receive timing adjustment value and the DL reference timing when the condition is valid and the DL reference timing when the condition is not valid.
1 . A method for receiving a downlink (DL) signal or channel associated with a reception timing procedure, the method comprising:
receiving:
first information for a receive timing adjustment value, and
second information for a condition;
determining:
a DL reference timing, and
whether the condition is valid for reception in a slot; and
receiving the DL signal or channel in the slot based on:
the receive timing adjustment value and the DL reference timing when the condition is valid, and
the DL reference timing when the condition is not valid.
2 . The method of claim 1 , wherein the first information is associated with an index value to determine the receive timing adjustment value.
3 . The method of claim 1 , wherein the first information is received using a downlink control information (DCI) information field or a media access control-channel element (MAC CE).
4 . The method of claim 1 , wherein:
the condition is based on one of:
a slot or symbol number,
a slot or symbol type, or
a DL signal or channel format; and
the condition is valid when:
the slot or symbol number is indicated for simultaneous transmission and reception during a same time-domain resource on a cell,
the slot or symbol number is not indicated for simultaneous transmission and reception during a same time-domain resource on the cell,
the slot or symbol type is one of a DL type, a flexible (F) type, or an uplink (UL) type,
the slot or symbol type is one of subband full duplex (SBFD) or non-SBFD, or
a format of the DL signal or channel is one of a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS), a phase tracking reference signal (PTRS) a physical broadcast channel (PBCH), a primary synchronization signal (PSS), or a secondary synchronization signal (SSS).
5 . The method of claim 1 , further comprising:
identifying a validity period that is associated with the first information; and
using the receive timing adjustment value when a reception timing is within the validity period.
6 . The method of claim 1 , further comprising:
receiving a configuration for the DL reference timing,
wherein determining the DL reference timing further comprises determining the DL reference timing based on the configuration.
7 . The method of claim 1 , wherein the first information is included in a time domain resource allocation (TDRA) table which is signaled via a radio resource control (RRC) information field.
8 . A user equipment (UE) comprising:
a transceiver configured to receive:
first information for a receive timing adjustment value, and
second information for a condition; and
a processor operably coupled to the transceiver, the processor configured to determine:
a downlink (DL) reference timing, and
whether the condition is valid for reception in a slot;
wherein the transceiver is further configured to receive a DL signal or channel in the slot based on:
the receive timing adjustment value and the DL reference timing when the condition is valid, and
the DL reference timing when the condition is not valid.
9 . The UE of claim 8 , wherein the first information is associated with an index value to determine the receive timing adjustment value.
10 . The UE of claim 8 , wherein the first information is received using a downlink control information (DCI) information field or a media access control-channel element (MAC CE).
11 . The UE of claim 8 , wherein:
the condition is based on one of:
a slot or symbol number,
a slot or symbol type, or
a DL signal or channel format; and
the condition is valid when:
the slot or symbol number is indicated for simultaneous transmission and reception during a same time-domain resource on a cell,
the slot or symbol number is not indicated for simultaneous transmission and reception during a same time-domain resource on the cell,
the slot or symbol type is one of a DL type, a flexible (F) type, or an uplink (UL) type,
the slot or symbol type is one of subband full duplex (SBFD) or non-SBFD, or
a format of the DL signal or channel is one of a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS), a phase tracking reference signal (PTRS) a physical broadcast channel (PBCH), a primary synchronization signal (PSS), or a secondary synchronization signal (SSS).
12 . The UE of claim 8 , wherein the processor is further configured to:
identify a validity period that is associated with the first information; and
use the receive timing adjustment value when a reception timing is within the validity period.
13 . The UE of claim 8 , wherein:
the transceiver is further configured to receive a configuration for the DL reference timing, and
the processor is further configured to determine the DL reference timing based on the configuration.
14 . The UE of claim 8 , wherein the first information is included in a time domain resource allocation (TDRA) table which is signaled via a radio resource control (RRC) information field.
15 . A base station (BS) comprising:
a processor; and
a transceiver operably coupled to the processor, the transceiver configured to transmit:
first information for a receive timing adjustment value,
second information for a condition, and
a downlink (DL) signal or channel in a slot for reception based on:
the receive timing adjustment value and a DL reference timing when the condition is valid, and
the DL reference timing when the condition is not valid.
16 . The BS of claim 15 , wherein the first information is associated with an index value to determine the receive timing adjustment value.
17 . The BS of claim 15 , wherein the first information is transmitted using a downlink control information (DCI) information field or a media access control-channel element (MAC CE).
18 . The BS of claim 15 , wherein:
the condition is based on one of:
a slot or symbol number,
a slot or symbol type, or
a DL signal or channel format; and
the condition is valid when:
the slot or symbol number is indicated for simultaneous transmission and reception during a same time-domain resource on a cell,
the slot or symbol number is not indicated for simultaneous transmission and reception during a same time-domain resource on the cell,
the slot or symbol type is one of a DL type, a flexible (F) type, or an uplink (UL) type,
the slot or symbol type is one of subband full duplex (SBFD) or non-SBFD, or
a format of the DL signal or channel is one of a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a demodulation reference signal (DMRS), a channel state information-reference signal (CSI-RS), a phase tracking reference signal (PTRS) a physical broadcast channel (PBCH), a primary synchronization signal (PSS), or a secondary synchronization signal (SSS).
19 . The BS of claim 15 , wherein a validity period, associated with the first information, indicates to use the receive timing adjustment value when a reception timing is within the validity period.
20 . The BS of claim 15 , wherein the transceiver is further configured to transmit a configuration that indicates the DL reference timing.