Spatial inter-cell interference aware downlink coordination

1. A method of wireless communication by a first network device, comprising:

predicting spatial inter-cell downlink interference experienced by a UE; and

communicating with a second network device to reduce the spatial inter-cell downlink interference in a direction of the UE by protecting resources across selected resource sets.

2. The method of claim 1 , in which the first network device comprises a serving cell and the second network device comprises a potentially interfering neighbor cell, the method further comprising:

selecting, by the first network device, the UE for which the predicted inter-cell downlink interference exceeds a predetermined threshold; and

transmitting a request message to the second network device.

3. The method of claim 2 , in which the request message indicates beams that cause excessive interference.

4. The method of claim 2 , in which the request message indicates time/frequency resources to protect.

5. The method of claim 2 , in which the request message indicates an amount of resources to protect, the amount determined based on a traffic demand of the UE.

6. The method of claim 2 , in which the request message indicates an index of the selected resource sets within a predetermined list of resource sets.

7. The method of claim 2 , further comprising receiving a response message indicating acceptance of a proposal indicated by the request message.

8. The method of claim 2 , further comprising receiving a response message indicating an alternative proposal for a different set of resources.

9. The method of claim 2 , further comprising updating the request message in response to an updated prediction based on an updated UE location, updated channel conditions for the UE, and/or an updated traffic demand for the UE.

10. The method of claim 1 , in which the first network device comprises a neighbor cell and the second network device comprises a serving cell, the method further comprising:

receiving a request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

predicting based on the request message; and

transmitting a response message to the second network device.

11. The method of claim 10 , further comprising receiving updates from the second network device of the UE location, the UE interference tolerance threshold, and/or the resource demand for the UE.

12. The method of claim 1 , in which the first network device comprises a central node and the second network device comprises a serving cell, the method further comprising:

receiving a first request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

predicting based on the first request message;

transmitting a second request message to an aggressor neighbor cell requesting resource protection; and

transmitting a response message to the second network device indicating protected resources.

13. The method of claim 12 , further comprising updating the predicting based on an updated UE location, updated channel conditions for the UE, and/or an updated resource demand for the UE.

14. An apparatus for wireless communication by a first network device, comprising:

means for predicting spatial downlink inter-cell interference experienced by a UE; and

means for communicating with a second network device to reduce the spatial downlink inter-cell interference in a direction of the UE by protecting resources across selected resource sets.

15. The apparatus of claim 14 , in which the first network device comprises a serving cell and the second network device comprises a potentially interfering neighbor cell, the apparatus further comprising:

means for selecting, by the first network device, the UE for which the predicted spatial downlink inter-cell interference exceeds a predetermined threshold; and

means for transmitting a request message to the second network device.

16. The apparatus of claim 15 , further comprising means for receiving a response message indicating acceptance of a proposal indicated by the request message.

17. The apparatus of claim 15 , further comprising means for receiving a response message indicating an alternative proposal for a different set of resources.

18. The apparatus of claim 15 , further comprising means for updating the request message in response to an updated prediction based on an updated UE location, updated channel conditions for the UE, and/or an updated traffic demand for the UE.

19. The apparatus of claim 14 , in which the first network device comprises a neighbor cell and the second network device comprises a serving cell, the apparatus further comprising:

means for receiving a request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

means for predicting based on the request message; and

means for transmitting a response message to the second network device.

20. The apparatus of claim 19 , further comprising means for receiving updates from the second network device of the UE location, the UE interference tolerance threshold, and/or the resource demand for the UE.

21. The apparatus of claim 14 , in which the first network device comprises a central node and the second network device comprises a serving cell, the apparatus further comprising:

means for receiving a first request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

means for predicting based on the first request message;

means for transmitting a second request message to an aggressor neighbor cell requesting resource protection; and

means for transmitting a response message to the second network device indicating protected resources.

22. The apparatus of claim 21 , further comprising means for updating the predicting based on an updated UE location, updated channel conditions for the UE, and/or an updated resource demand for the UE.

23. A first network device, comprising:

a processor;

a memory coupled with the processor;

instructions stored in the memory and operable, when executed by the processor, to cause the first network device:

to predict spatial inter-cell downlink interference experienced by a UE, and

to communicate with a second network device to reduce the spatial inter-cell downlink interference in a direction of the UE by protecting resources across selected resource sets.

24. The first network device of claim 23 , in which the first network device comprises a serving cell and the second network device comprises a potentially interfering neighbor cell, the instructions further cause the first network device:

to select the UE for which the predicted inter-cell downlink interference exceeds a predetermined threshold; and

to transmit a request message to the second network device.

25. The first network device of claim 23 , in which the first network device comprises a neighbor cell and the second network device comprises a serving cell, the instructions further cause the first network device:

to receive a request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

to predict based on the request message; and

to transmit a response message to the second network device.

26. The first network device of claim 23 , in which the first network device comprises a central node and the second network device comprises a serving cell, the instructions further cause the first network device:

to receive a first request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

to predict based on the first request message;

to transmit a second request message to an aggressor neighbor cell requesting resource protection; and

to transmit a response message to the second network device indicating protected resources.

27. The first network device of claim 26 , in which the instructions further cause the first network device to update the predicting based on an updated UE location, updated channel conditions for the UE, and/or an updated resource demand for the UE.

28. A non-transitory computer-readable medium having program code recorded thereon, the program code executed by a processor of a first network device and comprising:

program code predict spatial inter-cell downlink interference experienced by a UE; and

program code to communicate with a second network device to reduce the spatial inter-cell downlink interference in a direction of the UE by protecting resources across selected resource sets.

29. The non-transitory computer-readable medium of claim 28 , in which the first network device comprises a neighbor cell and the second network device comprises a serving cell, the non-transitory computer-readable medium further comprising:

program code to receive a request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

program code to predict based on the request message; and

program code to transmit a response message to the second network device.

30. The non-transitory computer-readable medium of claim 28 , in which the first network device comprises a central node and the second network device comprises a serving cell, the non-transitory computer-readable medium further comprising:

program code to receive a first request message, from the second network device, indicating a location of the UE, a UE interference tolerance threshold, and/or a resource demand for the UE;

program code to predict based on the first request message;

program code to transmit a second request message to an aggressor neighbor cell requesting resource protection; and

program code to transmit a response message to the second network device indicating protected resources.