Improving coverage in a high frequency range
A wireless transmit receive unit (WTRU) may be configured to receive configuration information from a network regarding a set of spatial filters for the WTRU to use to communicate with the network. Each of the spatial filters may be associated a beam group and/or a measurement resource. The WTRU may further receive downlink control information (DCI) that indicates one or more time periods in which a portion of the set of configured spatial filters may be applicable. Based on the configuration information, the DCI, and/or a measurement, the WTRU may select a spatial filter from the portion of spatial filters to apply in the time period, and the WTRU may perform a communication task in the time period using the selected spatial filter.
1. A wireless transmit receive unit (WTRU), comprising:
a processor configured to:
receive configuration information from a network device, wherein the configuration information indicates an association between a set of spatial filters and a beam group;
receive downlink control information (DCI), wherein the DCI includes a beam group indication and indicates at least one time period to which the beam group indication is applicable;
select, based on at least the association indicated by the configuration information and the beam group indication included in the DCI, a spatial filter from the set of spatial filters to apply in the at least one time period; and
perform a transmission or reception in the at least one time period using the selected spatial filter.
2. The WTRU of claim 1 , wherein the processor is configured to select the spatial filter from the set of spatial filters further based on a measurement performed using a measurement resource associated with the spatial filter.
3. The WTRU of claim 1 , wherein the DCI is group-common DCI associated with a group of WTRUs.
4. The WTRU of claim 1 , wherein the configuration information associates the set of spatial filters with an identifier of the beam group, and wherein the beam group indication includes the identifier of the beam group.
5. The WTRU of claim 1 , wherein the processor is further configured to determine, based on the spatial filter selected for the at least one time period, a frequency resource to be used to perform the transmission or reception in the at least one time period.
6. The WTRU of claim 1 , wherein the at least one time period comprises a symbol, a time slot, or a subframe.
7. The WTRU of claim 1 , wherein the transmission performed using the selected spatial filter includes an uplink transmission scheduled by a configured grant.
8. The WTRU of claim 1 , wherein the set of spatial filters are associated with respective beams.
9. The WTRU of claim 1 , wherein the processor is configured to communicate with multiple transmission/reception points (TRPs), and wherein the beam group is associated with one of the multiple TRPs.
10. The WTRU of claim 1 , wherein the processor is further configured to transmit an indication of the selected spatial filter to the network device.
11. The WTRU of claim 10 wherein the indication is transmitted via uplink control information (UCI) or a media access control (MAC) control element (MAC CE).
12. A method implemented by a wireless transmit receive unit (WTRU), the method comprising:
receiving configuration information from a network device, wherein the configuration information indicates an association between a set of spatial filters and a beam group;
receiving downlink control information (DCI), wherein the DCI includes a beam group indication and indicates at least one time period to which the beam group indication is applicable;
selecting, based on at least the association indicated by the configuration information and the beam group indication included in the DCI, a spatial filter from the set of spatial filters to apply in the at least one time period; and
performing a transmission or reception in the at least one time period using the selected spatial filter.
13. The method of claim 12 , wherein the spatial filter is selected from the set of spatial filters further based on a measurement performed using a measurement resource associated with the spatial filter.
14. The method of claim 12 , wherein the configuration information associates the set of spatial filters with an identifier of the beam group, the DCI is group-common DCI associated with a group of WTRUs, and the beam group indication includes the identifier of the beam group.
15. The method of claim 12 , further comprising determining, based on the spatial filter selected for the at least one time period, a frequency resource to be used to perform the transmission or reception in the at least one time period.
16. The method of claim 12 , wherein the at least one time period comprises a symbol, a time slot, or a subframe.
17. The method of claim 12 , wherein the transmission performed using the selected spatial filter includes an uplink transmission scheduled by a configured grant.
18. The method of claim 12 , wherein the set of spatial filters is associated with respective beams.
19. The method of claim 12 , wherein the WTRU is configured to communicate with multiple transmission/reception points (TRPs), and wherein the beam group is associated with one of the multiple TRPs.
20. The method of claim 12 , further comprising transmitting an indication of the selected spatial filter to the network device via uplink control information (UCI) or a media access control (MAC) control element (MAC CE).