Beam management for repeaters
Apparatuses and methods for beam management for repeaters. A method for a network-controlled repeater (NCR) includes receiving, by an NCR mobile termination (NCR-MT) entity, first information for a list of spatial domain filters for an access link of an NCR forwarding (NCR-Fwd) entity, second information for a set of spatial relations corresponding to reference signals (RS) for transmission or reception on a control link (C-link) of the NCR-MT entity, and third information indicating an uplink (UL) or downlink (DL) direction for each time domain resource. The method further includes determining an UL time domain resource, a first spatial domain filter, and a second spatial domain filter based on the second information. The method further includes receiving, by the NCR-Fwd entity, a radio frequency (RF) signal on the access link using the first spatial domain filter and transmitting the RF signal on a backhaul link using the second spatial domain filter.
1. A method for a network-controlled repeater (NCR), the method comprising:
receiving, by an NCR mobile termination (NCR-MT) entity:
first information for a list of spatial domain filters for an access link of an NCR forwarding (NCR-Fwd) entity corresponding to a list of time domain resources,
second information for a set of spatial relations corresponding to reference signals (RSs) for transmission or reception on a control link (C-link) of the NCR-MT entity, and
third information indicating an uplink (UL) direction or a downlink (DL) direction for each time domain resource from the list of time domain resources;
determining, by the NCR-MT entity:
an UL time domain resource from the list of time domain resources based on the third information,
a first spatial domain filter from the list of spatial domain filters, and
a second spatial domain filter based on the second information;
receiving, by the NCR-Fwd entity, a radio frequency (RF) signal on the access link using the first spatial domain filter over the UL time domain resource;
amplifying, by the NCR-Fwd entity, the RF signal; and
transmitting, by the NCR-Fwd entity, the RF signal on a backhaul link of the NCR-Fwd entity using the second spatial domain filter over the UL time domain resource.
2. The method of claim 1 , further comprising:
determining, by the NCR-MT entity:
a DL time domain resource from the list of time domain resources based on the third information,
a third spatial domain filter, from the list of spatial domain filters, and
a fourth spatial domain filter based on the second information;
receiving, by the NCR-Fwd entity, an RF signal on the backhaul link using the fourth spatial domain filter over the DL time domain resource;
amplifying, by the NCR-Fwd entity, the RF signal; and
transmitting, by the NCR-Fwd entity, the RF signal on the access link using the third spatial domain filter over the DL time domain resource.
3. The method of claim 1 , wherein:
the first information includes a list of indexes from a set of indexes,
the list of spatial domain filters is from a set of spatial domain filters that the NCR-Fwd entity supports on the access link,
the set of spatial domain filters has a one-to-one mapping with the set of indexes, and
the set of spatial domain filters and the set of indexes are received from an operation and management (OAM) entity.
4. The method of claim 1 , wherein:
the first information indicates:
a first list of indexes for the list of time domain resources, and
a second list of indexes for the list of spatial domain filters for the access link, indexes in the first list have a one-to-one mapping with indexes in the second list, the first list includes an index for the UL time domain resource, and the second list includes an index for the first spatial domain filter.
5. The method of claim 1 , wherein:
the first information indicates:
a subcarrier spacing (SCS) for time domain resources within the list of time domain resources, and
parameters for the time domain resources, and
the parameters include:
an index of a starting slot,
an index of a starting symbol within the starting slot, and
a number of symbols.
6. The method of claim 1 , further comprising:
determining a time duration for application of a spatial domain filter for the access link, wherein the reception of the first information is in a symbol or slot that is before the UL time domain resource by at least the time duration.
7. The method of claim 1 , wherein:
the second spatial domain filter corresponds to a second spatial relation from the set of spatial relations for the C-link,
when the set of spatial relations for the C-link includes one spatial relation, the second spatial relation is the same as the one spatial relation, and
when the set of spatial relations for the C-link includes more than one spatial relation, the second spatial relation is one of:
a spatial relation, from the set of spatial relations, indicated for transmission by the NCR-MT entity on the C-link over the UL time resource,
a spatial relation, from the set of spatial relations, indicated for transmission by the NCR-Fwd entity on the backhaul link, or
a reference spatial relation from the set of spatial relations.
8. A network-controlled repeater (NCR) comprising:
a transceiver of an NCR mobile termination (NCR-MT) entity configured to receive:
first information for a list of spatial domain filters for an access link of an NCR forwarding (NCR-Fwd) entity corresponding to a list of time domain resources,
second information for a set of spatial relations corresponding to reference signals (RSs) for transmission or reception on a control link (C-link) of the NCR-MT entity, and
third information indicating an uplink (UL) direction or a downlink (DL) direction for each time domain resource from the list of time domain resources;
a processor of the NCR-MT entity, operably coupled to the transceiver of the NCR-MT entity, the processor of the NCR-MT entity configured to determine:
an UL time domain resource from the list of time domain resources based on the third information,
a first spatial domain filter from the list of spatial domain filters, and
a second spatial domain filter based on the second information; and
a transceiver of the NCR-Fwd entity, operably coupled to the processor of the NCR-MT entity, the transceiver of the NCR-Fwd entity configured to:
receive a radio frequency (RF) signal on the access link using the first spatial domain filter over the UL time domain resource;
amplify the RF signal; and
transmit the RF signal on a backhaul link of the NCR-Fwd entity using the second spatial domain filter over the UL time domain resource.
9. The NCR of claim 8 , wherein:
the processor of the NCR-MT entity is further configured to determine:
a DL time domain resource from the list of time domain resources based on the third information,
a third spatial domain filter, from the list of spatial domain filters, and
a fourth spatial domain filter based on the second information; and
the transceiver of the NCR-Fwd entity is further configured to:
receive an RF signal on the backhaul link using the fourth spatial domain filter over the DL time domain resource;
amplify the RF signal; and
transmit the RF signal on the access link using the third spatial domain filter over the DL time domain resource.
10. The NCR of claim 8 , wherein:
the first information includes a list of indexes from a set of indexes,
the list of spatial domain filters is from a set of spatial domain filters that the NCR-Fwd entity supports on the access link,
the set of spatial domain filters has a one-to-one mapping with the set of indexes, and
the set of spatial domain filters and the set of indexes are received from an operation and management (OAM) entity.
11. The NCR of claim 8 , wherein:
the first information indicates:
a first list of indexes for the list of time domain resources, and
a second list of indexes for the list of spatial domain filters for the access link, indexes in the first list have a one-to-one mapping with indexes in the second list, the first list includes an index for the UL time domain resource, and the second list includes an index for the first spatial domain filter.
12. The NCR of claim 8 , wherein:
the first information indicates:
a subcarrier spacing (SCS) for time domain resources within the list of time domain resources, and
parameters for the time domain resources, and
the parameters include:
an index of a starting slot,
an index of a starting symbol within the starting slot, and
a number of symbols.
13. The NCR of claim 8 , wherein:
the processor of the NCR-MT entity is further configured to determine a time duration for application of a spatial domain filter for the access link, and
the transceiver of the NCR-MT entity is further configured to receive the first information in a symbol or slot that is before the UL time domain resource by at least the time duration.
14. NCR of claim 8 , wherein:
the second spatial domain filter corresponds to a second spatial relation from the set of spatial relations for the C-link,
when the set of spatial relations for the C-link includes one spatial relation, the second spatial relation is the same as the one spatial relation, and
when the set of spatial relations for the C-link includes more than one spatial relation, the second spatial relation is one of:
a spatial relation, from the set of spatial relations, indicated for transmission by the NCR-MT entity on the C-link over the UL time resource,
a spatial relation, from the set of spatial relations, indicated for transmission by the NCR-Fwd entity on the backhaul link, or
a reference spatial relation from the set of spatial relations.
15. A base station comprising:
a transceiver configured to transmit to a network-controlled repeater mobile termination (NCR-MT) entity:
first information for a list of spatial domain filters for an access link of a network-controlled repeater forwarding (NCR-Fwd) entity corresponding to a list of time domain resources,
second information for a set of spatial relations corresponding to reference signals (RSs) for transmission or reception on a control link (C-link) of the NCR-MT entity,
third information indicating an uplink (UL) direction or a downlink (DL) direction for each time domain resource from the list of time domain resources;
a processor operably connected to the transceiver, the processor configured to determine:
an UL time domain resource from the list of time domain resources based on the third information, and
a first spatial domain filter based on the second information; and
the transceiver is further configured to receive a radio frequency (RF) signal on a backhaul link from the NCR-Fwd entity using the first spatial domain filter over the UL time domain resource.
16. The base station of claim 15 , wherein:
the processor is further configured to determine:
a DL time domain resource from the list of time domain resources based on the third information, and
a second spatial domain filter based on the second information; and
the transceiver is further configured to transmit an RF signal on the backhaul link using the second spatial domain filter over the DL time domain resource.
17. The base station of claim 15 , wherein:
the first information includes a list of indexes, from a set of indexes, for the list of spatial domain filters,
the list of spatial domain filters is from a set of spatial domain filters that the NCR-Fwd entity supports on the access link,
the set of spatial domain filters has a one-to-one mapping with the set of indexes, and
the set of spatial domain filters and the set of indexes are received from an operation and management (OAM) entity.
18. The base station of claim 15 , wherein:
the first information indicates:
a first list of indexes for the list of time domain resources,
a second list of indexes for the list of spatial domain filters for the access link,
a subcarrier spacing (SCS) for time domain resources within the list of time domain resources, and
parameters for the time domain resources, wherein the parameters include:
an index of a starting slot,
an index of a starting symbol within the starting slot, and
a number of symbols,
indexes in the first list have a one-to-one mapping with indexes in the second list,
the first list includes an index for the UL time domain resource,
the second list includes an index for the first spatial domain filter.
19. The base station of claim 15 , wherein:
the processor is further configured to determine a time duration for application of a spatial domain filter for the access link, and
the transceiver is further configured to transmit the first information in a symbol or slot that is before the UL time domain resource by at least the time duration.
20. The base station of claim 15 , wherein:
the first spatial domain filter corresponds to a second spatial relation from the set of spatial relations for the C-link,
when the set of spatial relations for the C-link includes one spatial relation, the second spatial relation is the same as the one spatial relation, and
when the set of spatial relations for the C-link includes more than one spatial relation, the second spatial relation is one of:
a spatial relation, from the set of spatial relations, indicated for reception by the NCR-MT entity on the C-link over the UL time resource,
a spatial relation, from the set of spatial relations, indicated for reception by the NCR-Fwd entity on the backhaul link, or
a reference spatial relation from the set of spatial relations.