Techniques for interference mitigation with muting via inter-cell coordination
Aspects described herein relate to interference mitigation for communication with muting via inter-cell coordination. In one example, a network entity such as a cell may identify a time or frequency resource allocated for communication with a user equipment (UE), and transmit, to a neighboring network entity, a muting message indicating that the time or frequency resource is occupied for communication. In another example, the network entity may receive, from a neighboring network entity, a muting message indicating that a time or frequency resource is occupied for communication. The network entity may further forgo scheduling of an uplink or downlink transmission to a UE on the indicated time or frequency resource. The network entity may further schedule data for uplink or downlink transmission with the UE on a different time or frequency resource.
1. A method of wireless communication at a network entity, comprising:
identifying a time or frequency resource allocated for communication with a user equipment (UE); and
transmitting, to a neighboring network entity, a muting message indicating that the time or frequency resource is occupied for communication;
wherein the muting message corresponds to a two-dimensional bitmap where a first value indicates a resource grid of time or frequency domain resources to be muted at the neighboring network entity, and a second value indicates a different resource grid of time or frequency domain resources available at the neighboring network entity, the muting message is transmitted per beam, and the muting message mutes at least one beam in a different network entity having an overlapping coverage area with the network entity.
2. The method of claim 1 , wherein the muting message triggers the neighboring network entity not to schedule an uplink or a downlink transmission using the time or frequency resource.
3. The method of claim 1 , wherein the muting message precludes uplink or downlink transmission in a time domain per at least one of an orthogonal frequency division multiplexing (OFDM) symbol, two or more OFDM symbols, a mini-slot, or a slot.
4. The method of claim 1 , wherein the muting message precludes uplink or downlink transmission in a frequency domain per resource block or group of resource blocks.
5. The method of claim 1 , wherein the muting message corresponding to the two-dimensional bitmap is transmitted per bandwidth part or a resource block range.
6. The method of claim 1 , wherein the muting message omits a beam identifier to trigger a muting of all beams.
7. The method of claim 1 , wherein the muting message indicates that the two-dimensional bitmap includes a periodic activation or deactivation pattern valid according to a defined periodicity.
8. The method of claim 1 , wherein the muting message indicates that the two-dimensional bitmap includes an aperiodic activation or deactivation pattern valid for a single instance.
9. The method of claim 1 , wherein the muting message is transmitted over an F1 interface, an Xn interface, an X2 interface, or an NG interface, and wherein the communication corresponds to ultra-reliable low-latency communication (URLLC).
10. A method of wireless communication at a network entity, comprising:
receiving, from a neighboring network entity, a muting message indicating that a time or frequency resource is occupied for communication;
forgoing scheduling of an uplink or downlink transmission to a user equipment (UE) on the indicated time or frequency resource; and
scheduling data for uplink or downlink transmission with the UE on a different time or frequency resource;
wherein the muting message corresponds to a two-dimensional bitmap where a first value indicates a resource grid of time or frequency domain resources to be muted at the neighboring network entity, and a second value indicates a different resource grid of time or frequency domain resources available at the neighboring network entity, the muting message is transmitted per beam, and the muting message mutes at least one beam in a different network entity having an overlapping coverage area with the network entity.
11. The method of claim 10 , wherein the muting message triggers the network entity not to schedule an uplink or a downlink transmission using the time or frequency resource.
12. The method of claim 10 , wherein the muting message precludes uplink or downlink transmission in a time domain per at least one of an orthogonal frequency division multiplexing (OFDM) symbol, two or more OFDM symbols, a mini-slot, or a slot.
13. The method of claim 10 , wherein the muting message precludes uplink or downlink transmission in a frequency domain per resource block or group of resource blocks.
14. The method of claim 10 , wherein the muting message corresponding to the two-dimensional bitmap is transmitted per bandwidth part or a resource block range.
15. The method of claim 10 , wherein the muting message omits a beam identifier to trigger a muting of all beams.
16. The method of claim 10 , wherein the muting message indicates that the two-dimensional bitmap includes a periodic activation or deactivation pattern valid according to a defined periodicity.
17. The method of claim 10 , wherein the muting message indicates that the two-dimensional bitmap includes an aperiodic activation or deactivation pattern valid for a single instance.
18. The method of claim 10 , wherein the muting message is transmitted over an F1 interface, an Xn interface, an X2 interface, or an NG interface, and wherein the communication corresponds to ultra-reliable low-latency communication (URLLC).
19. An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
at least one processor communicatively coupled with the transceiver and the memory, wherein the at least one processor is configured to: identify a time or frequency resource allocated for communication with a user equipment (UE); and
transmit, to a neighboring network entity, a muting message indicating that the time or frequency resource is occupied for communication;
wherein the muting message corresponds to a two-dimensional bitmap where a first value indicates a resource grid of time or frequency domain resources to be muted at the neighboring network entity, and a second value indicates a different resource grid of time or frequency domain resources available at the neighboring network entity, the muting message is transmitted per beam, and the muting message mutes at least one beam in a different network entity having an overlapping coverage area with the apparatus.
20. The apparatus of claim 19 , wherein the muting message triggers the neighboring network entity not to schedule an uplink or a downlink transmission using the time or frequency resource.
21. The apparatus of claim 19 , wherein the muting message precludes uplink or downlink transmission in a time domain per at least one of an orthogonal frequency division multiplexing (OFDM) symbol, two or more OFDM symbols, a mini-slot, or a slot.
22. An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
at least one processor communicatively coupled with the transceiver and the memory, wherein the at least one processor is configured to:
receive, from a neighboring network entity, a muting message indicating that a time or frequency resource is occupied for communication;
forgo scheduling of an uplink or downlink transmission to a user equipment (UE) on the indicated time or frequency resource; and
schedule data for uplink or downlink transmission with the UE on a different time or frequency resources;
wherein the muting message corresponds to a two-dimensional bitmap where a first value indicates a resource grid of time or frequency domain resources to be muted at the neighboring network entity, and a second value indicates a different resource grid of time or frequency domain resources available at the neighboring network entity, the muting message is transmitted per beam, and the muting message mutes at least one beam in a different network entity having an overlapping coverage area with the apparatus.
23. The apparatus of claim 22 , wherein the muting message triggers the neighboring network entity not to schedule an uplink or a downlink transmission using the time or frequency resource.
24. The apparatus of claim 22 , the muting message precludes uplink or downlink transmission in a time domain per at least one of an orthogonal frequency division multiplexing (OFDM) symbol, two or more OFDM symbols, a mini-slot, or a slot.