Methods and apparatus for cross link interference mitigation
The present disclosure relates to methods and devices for wireless communication including an apparatus, e.g., a user equipment (UE) and/or base station. In one aspect, the apparatus may configure a frame structure including a plurality of slots in a subframe, the plurality of slots including at least one of one or more downlink slots, one or more uplink slots, or one or more flexible slots, each of the one or more flexible slots including multiple subband resources. The apparatus may also signal configuration information of the frame structure including the plurality of slots. Additionally, the apparatus may communicate data via the frame structure including the plurality of slots.
1. An apparatus for wireless communication at a base station, comprising:
memory; and
at least one processor coupled to the memory and configured to:
configure a frame structure including a plurality of slots in a subframe, the plurality of slots including at least one of one or more downlink slots, one or more uplink slots, or one or more flexible slots, each of the one or more flexible slots including multiple subband resources;
signal configuration information of the frame structure including the plurality of slots; and
communicate data via the frame structure including the plurality of slots, wherein the data includes at least one downlink signal or downlink channel or at least one uplink signal or uplink channel, the at least one downlink signal or at least one uplink signal including a signal bandwidth, and wherein the at least one processor is further configured to:
determine a bandwidth difference between the signal bandwidth and the multiple subband resources; and
cancel the at least one downlink signal or drop the at least one uplink signal when the bandwidth difference is greater than a bandwidth threshold.
2. The apparatus of claim 1 , wherein the multiple subband resources include at least one of one or more flexible subband resources, one or more uplink subband resources, or one or more downlink subband resources.
3. The apparatus of claim 2 , wherein the at least one of the one or more flexible subband resources, the one or more uplink subband resources, or the one or more downlink subband resources are configurable.
4. The apparatus of claim 2 , wherein each of the one or more flexible subband resources includes at least one uplink subband resource or at least one downlink subband resource.
5. The apparatus of claim 1 , wherein the bandwidth difference is greater than the bandwidth threshold when the at least one downlink signal or the at least one uplink signal is at least partially outside a direction of the multiple subband resources.
6. The apparatus of claim 1 , wherein the at least one processor is further configured to:
map the at least one downlink signal or at least one uplink signal to a direction of the multiple subband resources.
7. The apparatus of claim 1 , wherein the at least one downlink signal is a channel state information reference signal (CSI-RS), tracking reference signal (TRS), or synchronization signal and the at least one uplink signal is a sounding reference signal (SRS).
8. The apparatus of claim 1 , wherein the at least one processor is further configured to:
determine whether a portion of the multiple subband resources is utilized to communicate the data.
9. The apparatus of claim 1 , wherein the at least one processor is further configured to:
receive a measurement of the multiple subband resources from a user equipment (UE).
10. The apparatus of claim 1 , wherein to signal the configuration information, the at least one processor is configured to signal the configuration information of the frame structure including the plurality of slots to another base station, the plurality of slots including the one or more flexible slots with the multiple subband resources.
11. The apparatus of claim 1 , wherein a cell-specific reference symbol (CRS) is communicated via the multiple subband resources of the frame structure.
12. The apparatus of claim 11 , wherein the at least one processor is further configured to:
stop transmission of the CRS via the multiple subband resources.
13. The apparatus of claim 11 , wherein the at least one processor is further configured to:
rate match or puncture a signal in the multiple subband resources based on the CRS.
14. The apparatus of claim 1 , wherein the at least one processor is further configured to:
adjust a beam direction including the data or adjusting a transmission configuration indication (TCI) state of the data based on interference.
15. The apparatus of claim 1 , wherein the multiple subband resources are frequency division multiplexing (FDM) resources and the frame structure is a frequency division duplex (FDD) frame structure.
16. The apparatus of claim 1 , further comprising a transceiver coupled to the at least one processor.
17. A method of wireless communication at a base station, comprising:
configuring a frame structure including a plurality of slots in a subframe, the plurality of slots including at least one of one or more downlink slots, one or more uplink slots, or one or more flexible slots, each of the one or more flexible slots including multiple subband resources;
signaling configuration information of the frame structure including the plurality of slots; and
communicating data via the frame structure including the plurality of slots, wherein the data includes at least one downlink signal or downlink channel or at least one uplink signal or uplink channel, the at least one downlink signal or at least one uplink signal including a signal bandwidth, and wherein the method further comprises:
determining a bandwidth difference between the signal bandwidth and the multiple subband resources; and
canceling the at least one downlink signal or dropping the at least one uplink signal when the bandwidth difference is greater than a bandwidth threshold.
18. An apparatus for wireless communication at a user equipment (UE), comprising:
memory; and
at least one processor coupled to the memory and configured to:
receive configuration information of a frame structure including a plurality of slots in a subframe, the plurality of slots including at least one of one or more downlink slots, one or more uplink slots, or one or more flexible slots, each of the one or more flexible slots including multiple subband resources; and
communicate data via the frame structure including the plurality of slots, wherein the data includes at least one downlink signal or downlink channel or at least one uplink signal or uplink channel, the at least one downlink signal or at least one uplink signal including a signal bandwidth, wherein the signal bandwidth and the multiple subband resources include a bandwidth difference, and wherein the at least one processor is further configured to:
drop the at least one downlink signal or cancel the at least one uplink signal when the bandwidth difference is greater than a bandwidth threshold.
19. The apparatus of claim 18 , wherein the multiple subband resources include at least one of one or more flexible subband resources, one or more uplink subband resources, or one or more downlink subband resources.
20. The apparatus of claim 19 , wherein the at least one of the one or more flexible subband resources, the one or more uplink subband resources, or the one or more downlink subband resources are configurable.
21. The apparatus of claim 19 , wherein each of the one or more flexible subband resources include at least one uplink subband resource or at least one downlink subband resource.
22. The apparatus of claim 18 , wherein the bandwidth difference is greater than the bandwidth threshold when the at least one downlink signal or the at least one uplink signal is at least partially outside a direction of the multiple subband resources.
23. The apparatus of claim 18 , wherein the at least one downlink signal is a channel state information reference signal (CSI-RS), tracking reference signal (TRS), or synchronization signal and the at least one uplink signal is a sounding reference signal (SRS).
24. The apparatus of claim 18 , wherein the at least one processor is further configured to:
transmit a measurement of the multiple subband resources to a base station; and
further comprising a transceiver coupled to the at least one processor.
25. A method of wireless communication at a user equipment (UE), comprising:
receiving configuration information of a frame structure including a plurality of slots in a subframe, the plurality of slots including at least one of one or more downlink slots, one or more uplink slots, or one or more flexible slots, each of the one or more flexible slots including multiple subband resources; and
communicating data via the frame structure including the plurality of slots, wherein the data includes at least one downlink signal or downlink channel or at least one uplink signal or uplink channel, the at least one downlink signal or at least one uplink signal including a signal bandwidth, wherein the signal bandwidth and the multiple subband resources include a bandwidth difference, and wherein the method further comprises:
dropping the at least one downlink signal or canceling the at least one uplink signal when the bandwidth difference is greater than a bandwidth threshold.