IP Library › Granted Patent US 12,302,124

Granted Patent B2

US 12,302,124 · App. 18/056,621 · Granted May 13, 2025

Beam direction selection for high pathloss mode operations

Inventors: Junyi Li (Fairless Hills, PA); Juergen Cezanne (Ocean Township, NJ); Vasanthan Raghavan (West Windsor Township, NJ)

Assignee: QUALCOMM Incorporated

H04W16/28

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Quick Facts

Patent No.: US 12,302,124
App. No.: 18/056,621
Granted: May 13, 2025
Kind: B2

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Abstract

Methods, systems, and devices for wireless communications are described. The described techniques enable a first wireless device (e.g., an integrated access and backhaul (IAB) node in an TAB system) or a network entity (e.g., a centralized unit (CU) in the TAB system) to select a set of wireless devices for communication. The first wireless device, the CU, or both may select the set of wireless devices for communication based on a pathloss mode of the first wireless device, whether an angular separation between a group of nodes (e.g., one or more of the set of wireless devices) is less than an angular separation threshold, or both. The first wireless device may communicate with the set of wireless devices with one or more communications beams. For example, the device may communicate with multiple wireless devices using a single communication beam if the angular separation between the multiple devices is relatively low.

Claims (149)

1. An apparatus for wireless communications at a first wireless device, comprising:

one or more memories; and

one or more processors coupled to the one or more memories and configured to cause the first wireless device to:

send a candidate list of communication candidates based at least in part on a pathloss mode for the first wireless device, wherein the communication candidates comprise at least two wireless devices selected based at least in part on an angular separation with reference to the first wireless device that supports communication via a common communication beam;

receive an indication to communicate with a subset of wireless devices included in the candidate list based at least in part on the candidate list; and

communicate with the subset of wireless devices via the common communication beam based at least in part on the receipt of the indication to communicate with the subset of wireless devices.

2. The apparatus of claim 1 , wherein the pathloss mode comprises a high pathloss mode, and wherein the communication candidates are selected based at least in part on the pathloss mode that is the high pathloss mode.

3. The apparatus of claim 2 , wherein the angular separation is less than a threshold angular separation associated with the high pathloss mode, and wherein the one or more processors are further configured to cause the first wireless device to:

receive an indication of the threshold angular separation associated with the high pathloss mode.

4. The apparatus of claim 1 , wherein the one or more processors are further configured to cause the first wireless device to:

measure an angle of arrival, an angle of departure, or both, for communications with each wireless device of the at least two wireless devices; and

determine the angular separation for the at least two wireless devices based at least in part on the angle of arrival, or the angle of departure, or both.

5. The apparatus of claim 1 , wherein the one or more processors are is further configured to cause the first wireless device to:

receive power measurements for the communication candidates, wherein the communication candidates are selected based at least in part on the power measurements for the communication candidates.

6. The apparatus of claim 1 , wherein the one or more processors are is further configured to cause the first wireless device to:

report a set of spatial separation metrics that indicates which wireless devices of the communication candidates support communication with the first wireless device via a same communication beam.

7. The apparatus of claim 1 , wherein the one or more processors are further configured to cause the first wireless device to:

report an indication of one or more groups of wireless devices of the communication candidates, wherein each group of the one or more groups of wireless devices comprises a plurality of wireless devices that supports communication with the first wireless device via a same communication beam.

8. The apparatus of claim 1 , wherein the pathloss mode comprises a high pathloss mode, and wherein the one or more processors are further configured to cause the first wireless device to:

select, based at least in part on a deactivation of the high pathloss mode, an updated set of wireless devices as communication candidates based at least in part on each wireless device of the updated set of wireless devices having an angular separation with each other wireless device of the updated set of wireless devices with reference to the first wireless device that is greater than a threshold angular separation associated with the high pathloss mode; and

send an indication of an updated candidate list that comprises the updated set of wireless devices.

9. The apparatus of claim 1 , wherein the one or more processors are further configured to cause the first wireless device to:

receive an indication of a maximum quantity of communication candidates to report; and

select the communication candidates based at least in part on the maximum quantity of communication candidates to report.

10. The apparatus of claim 1 , further comprising:

an antenna configured to send the candidate list.

11. An apparatus for wireless communications at a network entity, comprising:

one or more memories; and

one or more processors coupled to the one or more memories and configured to cause the network entity to:

receive a candidate list of communication candidates for a first wireless device, wherein the communication candidates comprise a set of wireless devices; and

send an indication of a subset of the set of wireless devices for communication with the first wireless device, wherein the subset is selected based at least in part on a pathloss mode for the first wireless device and based at least in part on the subset of the set of wireless devices having an angular separation with reference to the first wireless device that supports communication with the first wireless device via a common communication beam.

12. The apparatus of claim 11 , wherein the pathloss mode comprises a high pathloss mode and the subset of the set of wireless devices is selected based at least in part on that the pathloss mode is the high pathloss mode, and wherein the one or more processors are further configured to cause the network entity to:

send an indication of a threshold angular separation associated with the high pathloss mode, wherein the angular separation is less than the threshold angular separation associated with the high pathloss mode.

13. The apparatus of claim 11 , wherein the one or more processors are further configured to cause the network entity to:

receive a set of spatial separation metrics that indicates which wireless devices of the set of wireless devices support communication with the first wireless device via a same communication beam, wherein the subset of the set of wireless devices is further based at least in part on the set of spatial separation metrics.

14. The apparatus of claim 11 , wherein the one or more processors are further configured to cause the network entity to:

receive an indication of one or more groups of wireless devices of the set of wireless devices, wherein each group of the one or more groups of wireless devices comprises a plurality of wireless devices that supports communication with the first wireless device via a same communication beam, and wherein the subset of the set of wireless devices is selected based at least in part on the one or more groups of wireless devices.

15. The apparatus of claim 11 , wherein the one or more processors are further configured to cause the network entity to:

receive a set of power measurements for the set of wireless devices, wherein the subset of the set of wireless devices is selected based at least in part on the set of power measurements.

16. The apparatus of claim 11 , wherein the one or more processors are further configured to cause the network entity to:

select the subset of the set of wireless devices such that a quantity of communication beams for the first wireless device to communicate with the subset of the set of wireless devices is less than or equal to a maximum quantity of supported communication beams for the first wireless device.

17. The apparatus of claim 11 , wherein the one or more processors are further configured to cause the network entity to:

send an indication of a maximum quantity of communication candidates to report, wherein the candidate list is based at least in part on the maximum quantity of communication candidates to report.

18. The apparatus of claim 11 , further comprising:

an antenna configured to receive the candidate list.

19. An apparatus for wireless communications at a first wireless device, comprising:

one or more memories; and

one or more processors coupled to the one or more memories and configured to cause the first wireless device to:

receive a list of one or more criteria to select communication candidates for a pathloss mode for the first wireless device;

send an indication of a set of wireless devices selected as communication candidates and angular separation information for the set of wireless devices, the set of wireless devices selected as communication candidates based at least in part on the list of one or more criteria; and

communicate with a subset of the set of wireless devices based at least in part on an indication of the subset received in response to the indication of the set of wireless devices and the angular separation information.

20. The apparatus of claim 19 , wherein the angular separation information for a wireless device of the set of wireless devices indicates an angular separation of the wireless device with reference to the first wireless device.

21. The apparatus of claim 19 , wherein the one or more processors are further configured to cause the first wireless device to:

perform measurements for the set of wireless devices based at least in part on the list of one or more criteria, wherein the set of wireless devices, the angular separation information, or both, is selected based at least in part on the measurements.

22. The apparatus of claim 19 , wherein the list of one or more criteria indicates a threshold angular separation, and wherein the one or more processors are further configured to cause the first wireless device to:

determine that a group of wireless devices has an angular separation with reference to the first wireless device that is below the threshold angular separation, wherein the group of wireless devices is in the set of wireless devices based at least in part on the angular separation that is below the threshold angular separation.

23. The apparatus of claim 19 , wherein the list of one or more criteria indicates a quantity of wireless devices in the set of wireless devices, and wherein the one or more processors are further configured to cause the first wireless device to:

select the set of wireless devices based at least in part on the quantity indicated by the list of one or more criteria.

24. The apparatus of claim 19 , further comprising:

an antenna configured to receive the list of one or more criteria.

25. An apparatus for wireless communications at a network entity, comprising:

one or more memories; and

one or more processors coupled to the one or more memories and configured to cause the network entity to:

send a list of one or more criteria to select communication candidates for a first wireless device, the list of one or more criteria based at least in part on a pathloss mode of the first wireless device;

receive, based at least in part on the list of one or more criteria, an indication of a set of wireless devices selected as communication candidates for the first wireless device and angular separation information for the set of wireless devices; and

send an indication of a subset of the set of wireless devices selected based at least in part on the pathloss mode for the first wireless device and the angular separation information for the set of wireless devices.

26. The apparatus of claim 25 , wherein the angular separation information for a wireless device of the set of wireless devices indicates an angular separation of the wireless device with reference to the first wireless device.

27. The apparatus of claim 25 , wherein the one or more processors are further configured to cause the network entity to:

determine, based at least in part on the angular separation information, that the subset of the set of wireless devices has an angular separation less than a threshold angular separation associated with the pathloss mode, wherein the subset of the set of wireless devices is selected based at least in part on the determination.

28. The apparatus of claim 25 , wherein the one or more processors are further configured to cause the network entity to:

determine, based at least in part on the angular separation information and the pathloss mode, that the subset of the set of wireless devices has an angular separation with reference to the first wireless device that supports communication via a common communication beam, wherein the subset of the set of wireless devices is selected based at least in part on the determination.

29. The apparatus of claim 25 , wherein the one or more processors are further configured to cause the network entity to:

receive beamwidth information for the set of wireless devices, wherein the subset of the set of wireless devices is selected based at least in part on the beamwidth information.

30. The apparatus of claim 25 , further comprising:

an antenna configured to send the list of one or more criteria.

31. A method for wireless communication at a first wireless device, comprising:

sending a candidate list of communication candidates based at least in part on a pathloss mode for the first wireless device, the communication candidates comprising at least two wireless devices selected based at least in part on having an angular separation with reference to the first wireless device that supports communication via a common communication beam;

receiving an indication to communicate with a subset of wireless devices included in the candidate list based at least in part on sending the candidate list; and

communicating with the subset of wireless devices via the common communication beam based at least in part on receiving the indication to communicate with the subset of wireless devices.

32. The method of claim 31 , wherein the pathloss mode comprises a high pathloss mode, and wherein the communication candidates are selected based at least in part on the pathloss mode being the high pathloss mode.

33. The method of claim 31 , wherein the angular separation is less than a threshold angular separation associated with the high pathloss mode, and wherein the method further comprises:

receiving an indication of the threshold angular separation associated with the high pathloss mode.

34. The method of claim 31 , further comprising:

measuring an angle of arrival, an angle of departure, or both, for communications with each wireless device of the at least two wireless devices; and

determining the angular separation for the at least two wireless devices based at least in part on the angle of arrival, or the angle of departure, or both.

35. The method of claim 31 , further comprising:

receiving power measurements for the communication candidates, wherein the communication candidates are selected based at least in part on the power measurements for the communication candidates.

36. The method of claim 31 , further comprising:

reporting a set of spatial separation metrics indicating which wireless devices of the communication candidates support communication with the first wireless device via a same communication beam.

37. The method of claim 31 , further comprising:

reporting an indication of one or more groups of wireless devices of the communication candidates, wherein each group of the one or more groups of wireless devices comprises a plurality of wireless devices that supports communication with the first wireless device via a same communication beam.

38. The method of claim 31 , wherein the pathloss mode comprises a high pathloss mode, and the method further comprising:

selecting, based at least in part on deactivating the high pathloss mode, an updated set of wireless devices as communication candidates based at least in part on each wireless device of the updated set of wireless devices having an angular separation with each other wireless device of the updated set of wireless devices with reference to the first wireless device that is greater than a threshold angular separation associated with the high pathloss mode; and

sending an indication of an updated candidate list comprising the updated set of wireless devices.

39. The method of claim 31 , further comprising:

receiving an indication of a maximum quantity of communication candidates to report; and

selecting the communication candidates based at least in part on the maximum quantity of communication candidates to report.

40. A method for wireless communications at a network entity, comprising:

receiving a candidate list of communication candidates for a first wireless device, the communication candidates comprising a set of wireless devices; and

sending an indication of a subset of the set of wireless devices for communication with the first wireless device, the subset selected based at least in part on a pathloss mode for the first wireless device and based at least in part on the subset of the set of wireless devices having an angular separation with reference to the first wireless device that supports communication with the first wireless device via a common communication beam.

41. The method of claim 40 , wherein the pathloss mode comprises a high pathloss mode and the subset of the set of wireless devices is selected based at least in part on the pathloss mode being the high pathloss mode, and the method further comprising:

sending an indication of a threshold angular separation associated with the high pathloss mode, wherein the angular separation is less than the threshold angular separation associated with the high pathloss mode.

42. The method of claim 40 , further comprising:

receiving a set of spatial separation metrics indicating which wireless devices of the set of wireless devices support communication with the first wireless device via a same communication beam, wherein the subset of the set of wireless devices is further based at least in part on the set of spatial separation metrics.

43. The method of claim 40 , further comprising:

receiving an indication of one or more groups of wireless devices of the set of wireless devices, wherein each group of the one or more groups of wireless devices comprises a plurality of wireless devices that supports communication with the first wireless device via a same communication beam, and wherein the subset of the set of wireless devices is selected based at least in part on the one or more groups of wireless devices.

44. The method of claim 40 , the method further comprising:

receiving a set of power measurements for the set of wireless devices wherein the subset of the set of wireless devices is selected based at least in part on the set of power measurements.

45. The method of claim 40 , further comprising:

selecting the subset of the set of wireless devices such that a quantity of communication beams for the first wireless device to communicate with the subset of the set of wireless devices is less than or equal to a maximum quantity of supported communication beams for the first wireless device.

46. The method of claim 40 , further comprising:

sending an indication of a maximum quantity of communication candidates to report, wherein the candidate list is based at least in part on the maximum quantity of communication candidates to report.

47. A method for wireless communications at a first wireless device, comprising:

receiving a list of one or more criteria for selecting communication candidates for a pathloss mode for the first wireless device;

sending an indication of a set of wireless devices selected as communication candidates and angular separation information for the set of wireless devices, the set of wireless devices selected as communication candidates based at least in part on the list of one or more criteria; and

communicating with a subset of the set of wireless devices based at least in part on an indication of the subset received in response to sending the indication of the set of wireless devices and the angular separation information.

48. The method of claim 47 , wherein the angular separation information for a wireless device of the set of wireless devices indicates an angular separation of the wireless device with reference to the first wireless device.

49. The method of claim 47 , further comprising:

performing measurements for the set of wireless devices based at least in part on the list of one or more criteria, wherein the set of wireless devices, the angular separation information, or both, is selected based at least in part on the measurements.

50. The method of claim 47 , wherein the list of one or more criteria indicates a threshold angular separation, and the method further comprising:

determining that a group of wireless devices has an angular separation with reference to the first wireless device that is below the threshold angular separation, wherein the group of wireless devices is included in the set of wireless devices based at least in part on the angular separation being below the threshold angular separation.

51. The method of claim 47 , wherein the list of one or more criteria indicates a quantity of wireless devices to include in the set of wireless devices, and the method further comprising:

selecting the set of wireless devices based at least in part on the quantity indicated by the list of one or more criteria.

52. A method for wireless communications at a network entity, comprising:

sending a list of one or more criteria for selecting communication candidates for a first wireless device, the list of one or more criteria based at least in part on a pathloss mode of the first wireless device;

receiving, based at least in part on sending the list of one or more criteria, an indication of a set of wireless devices selected as communication candidates for the first wireless device and angular separation information for the set of wireless devices; and

sending an indication of a subset of the set of wireless devices selected based at least in part on the pathloss mode for the first wireless device and the angular separation information for the set of wireless devices.

53. The method of claim 52 , wherein the angular separation information for a wireless device of the set of wireless devices indicates an angular separation of the wireless device with reference to the first wireless device.

54. The method of claim 52 , further comprising:

determining, based at least in part on the angular separation information, that the subset of the set of wireless devices has an angular separation less than a threshold angular separation associated with the pathloss mode, wherein the subset of the set of wireless devices is selected based at least in part on the determination.

55. The method of claim 52 , further comprising:

determining, based at least in part on the angular separation information and the pathloss mode, that the subset of the set of wireless devices has an angular separation with reference to the first wireless device that supports communication via a common communication beam, wherein the subset of the set of wireless devices is selected based at least in part on the determination.

56. The method of claim 52 , further comprising:

receiving beamwidth information for the set of wireless devices, wherein the subset of the set of wireless devices is selected based at least in part on the beamwidth information.

57. A non-transitory computer-readable medium storing code for wireless communications at a first wireless device, the code comprising instructions executable by one or more processors to cause the first wireless device to:

send a candidate list of communication candidates based at least in part on a pathloss mode for the first wireless device, the communication candidates comprising at least two wireless devices selected based at least in part on having an angular separation with reference to the first wireless device that supports communication via a common communication beam;

receive an indication to communicate with a subset of wireless devices included in the candidate list based at least in part on sending the candidate list; and

communicate with the subset of wireless devices via the common communication beam based at least in part on receiving the indication to communicate with the subset of wireless devices.

58. A non-transitory computer-readable medium storing code for wireless communications at a network entity, the code comprising instructions executable by one or more processors to cause the network entity to:

receive a candidate list of communication candidates for a first wireless device, the communication candidates comprising a set of wireless devices; and

send an indication of a subset of the set of wireless devices for communication with the first wireless device, the subset selected based at least in part on a pathloss mode for the first wireless device and based at least in part on the subset of the set of wireless devices having an angular separation with reference to the first wireless device that supports communication with the first wireless device via a common communication beam.

59. A non-transitory computer-readable medium storing code for wireless communications at a first wireless device, the code comprising instructions executable by one or more processors to cause the first wireless device to:

receive a list of one or more criteria for selecting communication candidates for a pathloss mode for the first wireless device;

communicate with a subset of the set of wireless devices based at least in part on an indication of the subset received in response to transmitting the indication of the set of wireless devices and the angular separation information.

60. A non-transitory computer-readable medium storing code for wireless communications at a network entity, the code comprising instructions executable by one or more processors to cause the network entity to:

send a list of one or more criteria for selecting communication candidates for a first wireless device, the list of one or more criteria based at least in part on a pathloss mode of the first wireless device;

receive, based at least in part on sending the list of one or more criteria, an indication of a set of wireless devices selected as communication candidates for the first wireless device and angular separation information for the set of wireless devices; and

Assignments (1)

ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 18, 2022

From: LI, JUNYI; CEZANNE, JUERGEN; RAGHAVAN, VASANTHAN

To: QUALCOMM INCORPORATED

Reel/Frame 061822/0567 →

Continuity (3)

Continuation 16806825 · Mar 2, 2020

Provisional Application 62835414 · Apr 17, 2019

Related Publication 20230085790A1 · Mar 23, 2023

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