Transmission timing for repeaters
Apparatuses and methods for transmission timing for repeaters. A method for operating a network-controlled repeater (NCR) includes receiving, by an NCR mobile termination (NCR-MT) entity on an NCR control link, information for a timing value for an NCR forwarding (NCR-Fwd) entity. The method further includes determining, by the NCR, a timing adjustment for an NCR access link based on the timing value and a reference signal (RS). The method further includes receiving, by the NCR-Fwd entity on the NCR access link, a radio frequency (RF) signal based on the timing adjustment.
1. A method for a network-controlled repeater (NCR), the method comprising:
receiving, by an NCR mobile termination (NCR-MT) entity on an NCR control link, information for a timing value for an NCR forwarding (NCR-Fwd) entity;
determining, by the NCR, a timing adjustment for an NCR access link based on the timing value and a reference signal (RS); and
receiving, by the NCR-Fwd entity on the NCR access link, a radio frequency (RF) signal based on the timing adjustment.
2. The method of claim 1 , wherein the timing value is a timing offset value or a timing window.
3. The method of claim 1 , wherein:
determining the timing adjustment further comprises determining, by the NCR, an aggregated timing adjustment value based on the timing value and a previous timing value, and
receiving the RF signal further comprises receiving, by the NCR-Fwd entity on the NCR access link, the RF signal based on the aggregated timing adjustment value.
4. The method of claim 1 , further comprising:
receiving, by the NCR on the NCR control link, information for a configuration for the RS;
receiving, by the NCR on the NCR control link or on an NCR forward link, the RS based on the configuration; and
determining, based on the RS, a start of a frame for receptions by the NCR-MT entity.
5. The method of claim 1 , wherein:
receiving the information for the timing value further comprises receiving, by the NCR-MT entity on the NCR control link, information from a base station for a set of timing values; and
the method further comprises determining, by the NCR, the timing value from the set of timing values.
6. The method of claim 1 , further comprising:
transmitting, by the NCR-Fwd entity on the NCR access link, a timing advance command that provides the timing value to a user equipment (UE); and
receiving, by the NCR-Fwd entity on the NCR access link, a transmission from the UE based on the timing adjustment.
7. The method of claim 1 , further comprising:
determining by the NCR:
measurement values based on a sounding reference signal (SRS) included in the RF signal; and
based on the measurement values, a spatial domain filter from a set of spatial domain filters that the NCR-Fwd entity supports on the NCR access link; and
receiving, by the NCR-Fwd entity on the NCR access link, a transmission from a user equipment (UE) based on the spatial domain filter.
8. A network-controlled repeater (NCR) comprising:
a transceiver of an NCR mobile termination (NCR-MT) entity configured to receive, on an NCR control link, information for a timing value for an NCR forwarding (NCR-Fwd) entity;
a processor of the NCR operably coupled to the transceiver of the NCR-MT entity, the processor of the NCR configured to determine a timing adjustment for an NCR access link based on the timing value and a reference signal (RS); and
a transceiver of the NCR-Fwd entity operably coupled to the processor of the NCR, the transceiver of the NCR-Fwd entity configured to receive, on the NCR access link, a radio frequency (RF) signal based on the timing adjustment.
9. The NCR of claim 8 , wherein:
the transceiver of the NCR-MT entity is further configured to receive the timing value as a timing offset value or a timing window; and
the processor is further configured to determine the timing value as the timing offset value or the timing window.
10. The NCR of claim 8 , wherein:
the processor is further configured to determine an aggregated timing adjustment value based on the timing value and a previous timing value, and
the transceiver of the NCR-Fwd entity is further configured to receive the RF signal based on the aggregated timing adjustment value.
11. The NCR of claim 8 , wherein:
the transceiver of the NCR-MT entity is further configured to receive:
information for a configuration for the RS, and
the RS based on the configuration; and
the processor is further configured to determine, based on the RS, a start of a frame for receptions by the NCR-MT entity.
12. The NCR of claim 8 , wherein:
the transceiver of the NCR-MT entity is further configured to receive information from a base station for a set of timing values; and
the processor is further configured to determine the timing value from the set of timing values.
13. The NCR of claim 8 , wherein the transceiver of the NCR-Fwd entity is further configured to:
transmit a timing advance command that provides the timing value to a user equipment (UE); and
receive a transmission from the UE based on the timing adjustment.
14. The NCR of claim 8 , wherein:
the processor is further configured to determine:
measurement values based on a sounding reference signal (SRS) included in the RF signal; and
based on the measurement values, a spatial domain filter from a set of spatial domain filters that the NCR-Fwd entity supports on the NCR access link; and
the transceiver of the NCR-Fwd entity is further configured to receive a transmission from a user equipment (UE) based on the spatial domain filter.
15. A base station comprising:
a processor configured to determine a timing value for a user equipment (UE) based on a timing adjustment for the UE in a cell; and
a transceiver operably coupled to the processor, the transceiver configured to transmit, to a network-controlled repeater mobile termination (NCR-MT) entity on a network-controlled repeater (NCR) control link, information indicating the timing value for the UE.
16. The base station of claim 15 , wherein the timing value is a timing offset value or a timing window.
17. The base station of claim 15 , wherein:
the processor is further configured to determine, based on a last timing value and a previous timing value, the timing value as an aggregated timing adjustment value, and
the transceiver is further configured to transmit, to the NCR-MT entity, the information indicating the timing value as the aggregated timing adjustment value.
18. The base station of claim 15 , wherein the transceiver is further configured to transmit to the NCR-MT entity:
information for a configuration of reference signal (RS) associated with a downlink (DL) reference transmit timing, and
the RS based on the configuration.
19. The base station of claim 15 , wherein:
the processor is further configured to determine a set of timing values; and
the transceiver is further configured to transmit, to the NCR-MT entity, the information indicating the set of timing values.
20. The base station of claim 15 , wherein the transceiver is further configured to transmit, to the NCR-MT entity, information for a configuration of a sounding reference signal (SRS).