SPATIAL-DIVISION MULTIPLE ACCESS (SDMA) ACROSS MULTIPLE OPERATORS

• US 20180302796A1
• Filed: 10/18/2017
• Published: 10/18/2018
• Est. Priority Date: 04/12/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: ZHANG, Xiaoxia, YOO, Taesang, MALLIK, Siddhartha, KADOUS, Tamer, JAIN, Vikas, SADEK, Ahmed
• Granted Patent: US 10,433,179 B2
• Time in Patent Office: Days
• CPC Class Codes: H04B 7/0413 MIMO systems
• CPC Class Codes: H04B 7/0697 using spatial multiplexing
• CPC Class Codes: H04B 7/204 Multiple access
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0098 Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
• CPC Class Codes: H04L 67/566 Grouping or aggregating service requests, e.g. for unified processing
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 74/0875 with assigned priorities based access

Abstract

Wireless communications systems and methods related to SDMA operations across multiple network operating entities are provided. A first wireless communication device transmits a communication indicating a reservation for one or more spatial layers in a transmission opportunity (TXOP) of a shared spectrum. The shared spectrum is shared by a first network operating entity and a second network operating entity. The first wireless communication device is associated with the first network operating entity. The first wireless communication device communicates, with a second wireless communication device, data over the one or more spatial layers during the TXOP. The second wireless communication device is associated with the first network operating entity.

Claims

1. A method of wireless communication, comprising:

transmitting, by a first wireless communication device associated with a first network operating entity, a communication indicating a reservation for one or more spatial layers in a transmission opportunity (TXOP) of a shared spectrum, wherein the shared spectrum is shared by the first network operating entity and a second network operating entity; and

communicating, by the first wireless communication device with a second wireless communication device associated with the first network operating entity, data over the one or more spatial layers during the TXOP.

2. The method of claim 1, wherein the transmitting includes transmitting one or more reservation response (RRS) signals using one or more resources designated to the first wireless communication device, and wherein each of the one or more resources corresponds to one of the one or more spatial layers.

3. The method of claim 1, wherein the transmitting includes transmitting one or more reservation response (RRS) signals to indicate the one or more spatial layers reserved in the TXOP using a same resource as an RRS signal transmission of another wireless communication device associated with the first network operating entity.

4. The method of claim 1, wherein the transmitting includes transmitting one or more sounding reference signals (SRSs) using one or more resources designated to the first wireless communication device, wherein each of the one or more resources corresponds to one of the one or more spatial layers, and wherein each of the one or more SRSs provides spatial channel information for a corresponding spatial layer of the one or more spatial layers.

5. The method of claim 1, further comprising receiving, by the first wireless communication device from the second wireless communication device, a reservation request (RRQ) signal indicating a first schedule in the TXOP for the first wireless communication device, and wherein the transmitting is in response to the RRQ signal.

6. The method of claim 5, wherein the RRQ signal further indicates a second schedule in the TXOP for another wireless communication device associated with the first network operating entity, and wherein the transmitting includes transmitting a reservation response (RRS) signal including the first schedule and the second schedule.

7. The method of claim 1, wherein the transmitting includes transmitting a reservation request (RRQ) signal indicating a first schedule for communication with the second wireless communication device over the one or more spatial layers during the TXOP.

8. The method of claim 7, further comprising generating, by the first wireless communication device, the RRQ signal by:

encoding the first schedule based on a first search space; and

encoding a second schedule in the TXOP based on a second search space different from the first search space.

9. The method of claim 1, wherein the reservation further indicates a transmission link direction, and wherein the communicating the data includes communicating the data in the transmission link direction.

10. The method of claim 1, wherein the first network operating entity includes a number of supportable spatial layers including the one or more spatial layers, and wherein the reservation further indicates whether sharing of remaining unreserved supportable spatial layers is allowed.

11. The method of claim 1, further comprises receiving, by the first wireless communication device from the second wireless communication device, a first set of sounding reference signals (SRSs) corresponding to the one or more spatial layers, wherein the data is pre-coded based on at least the first set of SRSs.

12. The method of claim 11, further comprising detecting, by the first wireless communication device, a second set of SRSs from the second network operating entity corresponding to one or more other spatial layers, wherein the data is further pre-coded based on the second set of SRSs.

13. The method of claim 12, further comprising:

obtaining, by the first wireless communication device, spatial layer information indicating supportable spatial layers of the second network operating entity, wherein the supportable spatial layers include the one or more spatial layers and the one or more other spatial layers;

detecting, by the first wireless communication device, another reservation for the TXOP from the second network operating entity reserving the one or more other spatial layers; and

determining, by the first wireless communication device, the one or more spatial layers for communication with the second wireless communication device in the TXOP based on at least the another reservation and the spatial layer information.

14. The method of claim 13, wherein the detecting the another reservation includes receiving one or more reservation response (RRS) signals indicating the one or more other spatial layers.

15. The method of claim 13, wherein the detecting the another reservation includes the receiving the second set of SRSs.

16. The method of claim 13, wherein the detecting the another reservation includes:

receiving a reservation request (RRQ) signal; and

determining, by applying blind decoding on the RRQ signal over one or more search spaces, that the one or more other spatial layers are reserved for at least one of a first scheduling period within the TXOP or a transmission link direction.

17. The method of claim 13, wherein the detecting the another reservation includes:

receiving a reservation response (RRS) signal; and

determining, by demodulating the RRS signal, that the one or more other spatial layers are reserved for at least one of a first scheduling period within the TXOP or a transmission link direction.

18. The method of claim 13, further comprising determining, by the first wireless communication device, that sharing of unreserved supportable spatial layers is allowed based on the another reservation.

19. The method of claim 13, further comprising determining, by the first wireless communication device, that the one or more other spatial layers are reserved for a first scheduling period within the TXOP based on the another reservation, wherein the communicating the data includes communicating the data in the first scheduling period.

20. The method of claim 13, further comprising determining, by the first wireless communication device, that the one or more other spatial layers are reserved for a transmission link direction based on the another reservation, wherein the communicating further includes communicating the data in the transmission link direction.

21. An apparatus comprising:

a transceiver configured to;

transmit a communication indicating a reservation for one or more spatial layers in a transmission opportunity (TXOP) of a shared spectrum, wherein the shared spectrum is shared by a first network operating entity and a second network operating entity, and wherein the apparatus is associated with the first network operating entity; and

communicate, with a second wireless communication device associated with the first network operating entity, data over the one or more spatial layers during the TXOP.

22. The apparatus of claim 21, wherein the transceiver is further configured to transmit the communication by transmitting one or more reservation response (RRS) signals using one or more resources designated to the apparatus, and wherein each of the one or more resources corresponds to one of the one or more spatial layers.

23. The apparatus of claim 21, wherein the transceiver is further configured to transmit the communication by transmitting one or more reservation response (RRS) signals to indicate the one or more spatial layers reserved in the TXOP using a same resource as an RRS signal transmission of another wireless communication device associated with the first network operating entity.

24. The apparatus of claim 21, wherein the transceiver is further configured to transmit the communication by transmitting one or more sounding reference signals (SRSs) using one or more resources designated to the apparatus, wherein each of the one or more resources corresponds to one of the one or more spatial layers, and wherein each of the one or more SRSs provides spatial channel information for a corresponding spatial layer of the one or more spatial layers.

25. The apparatus of claim 21, wherein the transceiver is further configured to receive, from the second wireless communication device, a reservation request (RRQ) signal indicating a first schedule in the TXOP for the apparatus, and wherein the communication is transmitted in response to the RRQ signal.

26. The apparatus of claim 25, wherein the RRQ signal further indicates a second schedule in the TXOP for another wireless communication device associated with the first network operating entity, and wherein the transceiver is further configured to transmit the communication by transmitting a reservation response (RRS) signal including the first schedule and the second schedule.

27. The apparatus of claim 21, wherein the transceiver is further configured to transmit the communication by transmitting a reservation request (RRQ) signal indicating a first schedule for communication with the second wireless communication device over the one or more spatial layers during the TXOP.

28. The apparatus of claim 27, further comprising a processor configured to generate the RRQ signal by:

encoding the first schedule based on a first search space; and

encoding a second schedule in the TXOP based on a second search space different from the first search space.

29. The apparatus of claim 21, wherein the reservation further indicates a transmission link direction, and wherein the transceiver is further configured to communicate the data by communicating the data in the transmission link direction.

30. The apparatus of claim 21, wherein the first network operating entity includes a number of supportable spatial layers including the one or more spatial layers, and wherein the reservation further indicates whether sharing of remaining unreserved supportable spatial layers is allowed.

31. The apparatus of claim 21, wherein the transceiver is further configured to receive, from the second wireless communication device, a first set of sounding reference signals (SRSs) corresponding to the one or more spatial layers, and wherein the data is pre-coded based on at least the first set of SRSs.

32. The apparatus of claim 31, further comprising a processor configured to detect a second set of SRSs from the second network operating entity corresponding to one or more other spatial layers, wherein the data is further pre-coded based on the second set of SRSs.

33. The apparatus of claim 32, further comprising a processor configured to:

obtain spatial layer information indicating supportable spatial layers of the second network operating entity, wherein the supportable spatial layers include the one or more spatial layers and the one or more other spatial layers;

detect another reservation for the TXOP from the second network operating entity reserving the one or more other spatial layers; and

determine the one or more spatial layers for communication with the second wireless communication device in the TXOP based on at least the another reservation and the spatial layer information.

34. The apparatus of claim 33, wherein the processor is further configured to detect the another reservation by receiving one or more reservation response (RRS) signals indicating the one or more other spatial layers.

35. The apparatus of claim 33, wherein the processor is further configured to detect the another reservation by receiving the second set of SRSs.

36. The apparatus of claim 33, wherein the processor is further configured to detect the another reservation by:

receiving a reservation request (RRQ) signal; and

determining, by applying blind decoding on the RRQ signal over one or more search spaces, that the one or more other spatial layers are reserved for at least one of a first scheduling period within the TXOP or a transmission link direction.

37. The apparatus of claim 33, wherein the processor is further configured to detect the another reservation by:

receiving a reservation response (RRS) signal; and

determining, by demodulating the RRS signal, that the one or more other spatial layers are reserved for at least one of a first scheduling period within the TXOP or a transmission link direction.

38. The apparatus of claim 33, wherein the processor is further configured to determine that sharing of unreserved supportable spatial layers is allowed based on the another reservation.

39. The apparatus of claim 33, wherein the processor is further configured to determine that the one or more other spatial layers are reserved for a first scheduling period within the TXOP based on the another reservation, and wherein the communicating the data includes communicating the data in the first scheduling period.

40. The apparatus of claim 33, wherein the processor is further configured to determine that the one or more other spatial layers are reserved for a transmission link direction based on the another reservation, and wherein the communicating further includes communicating the data in the transmission link direction.

41. A computer-readable medium having program code recorded thereon, the program code comprising:

code for causing a first wireless communication device associated with a first network operating entity to transmit a communication indicating a reservation for one or more spatial layers in a transmission opportunity (TXOP) of a shared spectrum, wherein the shared spectrum is shared by the first network operating entity and a second network operating entity; and

code for causing the first wireless communication device to communicate, with a second wireless communication device associated with the first network operating entity, data over the one or more spatial layers during the TXOP.

42. The computer-readable medium of claim 41, wherein the code for causing the first wireless communication device to transmit the communication is further configured to transmit one or more reservation response (RRS) signals using one or more resources designated to the first wireless communication device, and wherein each of the one or more resources corresponds to one of the one or more spatial layers.

43. The computer-readable medium of claim 41, wherein the code for causing the first wireless communication device to transmit the communication is further configured to transmit one or more reservation response (RRS) signals to indicate the one or more spatial layers reserved in the TXOP using a same resource as an RRS signal transmission of another wireless communication device associated with the first network operating entity.

44. The computer-readable medium of claim 41, wherein the code for causing the first wireless communication device to transmit the communication is further configured to transmit one or more sounding reference signals (SRSs) using one or more resources designated to the first wireless communication device, wherein each of the one or more resources corresponds to one of the one or more spatial layers, and wherein each of the one or more SRSs provides spatial channel information for a corresponding spatial layer of the one or more spatial layers.

45. The computer-readable medium of claim 41, further comprising code for causing the first wireless communication device to receive, from the second wireless communication device, a reservation request (RRQ) signal indicating a first schedule in the TXOP for the first wireless communication device, wherein the code for causing the first wireless communication device to transmit the communication is further configured to the transmit the communication is in response to the RRQ signal.

46. The computer-readable medium of claim 45, wherein the RRQ signal further indicates a second schedule in the TXOP for another wireless communication device associated with the first network operating entity, and wherein the code for causing the first wireless communication device to transmit the communication is further configured to transmit a reservation response (RRS) signal including the first schedule and the second schedule.

47. The computer-readable medium of claim 41, wherein the code for causing the first wireless communication device to transmit the communication is further configured to transmit a reservation request (RRQ) signal indicating a first schedule for communication with the second wireless communication device over the one or more spatial layers during the TXOP.

48. The computer-readable medium of claim 47, further comprising code for causing the first wireless communication device to generate the RRQ signal by:

encoding the first schedule based on a first search space; and

encoding a second schedule in the TXOP based on a second search space different from the first search space.

49. The computer-readable medium of claim 41, wherein the reservation further indicates a transmission link direction, and wherein the code for causing the first wireless communication device to communicate the data is further configured to communicate the data in the transmission link direction.

50. The computer-readable medium of claim 41, wherein the first network operating entity includes a number of supportable spatial layers including the one or more spatial layers, and wherein the reservation further indicates whether sharing of remaining unreserved supportable spatial layers is allowed.

51. The computer-readable medium of claim 41, further comprises code for causing the first wireless communication device to receive, from the second wireless communication device, a first set of sounding reference signals (SRSs) corresponding to the one or more spatial layers, wherein the data is pre-coded based on at least the first set of SRSs.

52. The computer-readable medium of claim 51, further comprising code for causing the first wireless communication device to detect a second set of SRSs from the second network operating entity corresponding to one or more other spatial layers, wherein the data is further pre-coded based on the second set of SRSs.

53. The computer-readable medium of claim 52, further comprising:

code for causing the first wireless communication device to obtain spatial layer information indicating supportable spatial layers of the second network operating entity, wherein the supportable spatial layers include the one or more spatial layers and the one or more other spatial layers;

code for causing the first wireless communication device to detect another reservation for the TXOP from the second network operating entity reserving the one or more other spatial layers; and

code for causing the first wireless communication device to determine the one or more spatial layers for communication with the second wireless communication device in the TXOP based on at least the another reservation and the spatial layer information.

54. The computer-readable medium of claim 53, wherein the code for causing the first wireless communication device to detect the another reservation is further configured to receive one or more reservation response (RRS) signals indicating the one or more other spatial layers.

55. The computer-readable medium of claim 53, wherein the code for causing the first wireless communication device to detect the another reservation is further configured to receive the second set of SRSs.

56. The computer-readable medium of claim 53, wherein the code for causing the first wireless communication device to detect the another reservation is further configured to:

receive a reservation request (RRQ) signal; and

determine, by applying blind decoding on the RRQ signal over one or more search spaces, that the one or more other spatial layers are reserved for at least one of a first scheduling period within the TXOP or a transmission link direction.

57. The computer-readable medium of claim 53, wherein the code for causing the first wireless communication device to detect the another reservation is further configured to:

receive a reservation response (RRS) signal; and

determine, by demodulating the RRS signal, that the one or more other spatial layers are reserved for at least one of a first scheduling period within the TXOP or a transmission link direction.

58. The computer-readable medium of claim 53, further comprising code for causing the first wireless communication device to determine that sharing of unreserved supportable spatial layers is allowed based on the another reservation.

59. The computer-readable medium of claim 53, further comprising code for causing the first wireless communication device to determine that the one or more other spatial layers are reserved for a first scheduling period within the TXOP based on the another reservation, wherein the code for causing the first wireless communication device to communicate the data is further configured to communicate the data in the first scheduling period.

60. The computer-readable medium of claim 53, further comprising code for causing the first wireless communication device to determine that the one or more other spatial layers are reserved for a transmission link direction based on the another reservation, wherein the communicating further includes communicating the data in the transmission link direction.