Priority management for new radio-spectrum sharing (NR-SS)

• US 10,123,358 B2
• Filed: 06/02/2017
• Issued: 11/06/2018
• Est. Priority Date: 12/22/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Fakoorian, Seyed Ali Akbar, Zhang, Xiaoxia, Yoo, Taesang, Montojo, Juan
• Primary Examiner(s): Taylor, Nathan
• Application Number:
  US15/612,435
• Publication Number:
  US 20180184463A1
• Time in Patent Office: 522 Days
• Field of Search: 455454, 455450
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 74/0875 with assigned priorities based access

Abstract

Wireless communications systems and methods related to managing dynamic priority-based spectrum access are provided. A first wireless communication device transmits dynamic priority information for accessing a shared spectrum in a transmission opportunity (TXOP). The shared spectrum is shared by a plurality of network operating entities. The first wireless communication device is associated with a first network operating entity of a plurality of network operating entities. The dynamic priority information indicates an access priority of the first network operating entity among the plurality of network operating entities in the TXOP. The first wireless communication device communicates with a second wireless communication device associated with the first network operating entity in the TXOP based on the dynamic priority information.

Claims

1. A method of wireless communication, comprising:

transmitting, by a first wireless communication device associated with a first network operating entity of a plurality of network operating entities, dynamic priority information for accessing a shared spectrum in a transmission opportunity (TXOP), wherein the shared spectrum is shared by the plurality of network operating entities, wherein the dynamic priority information indicates an access priority of the first network operating entity among the plurality of network operating entities in the TXOP, and wherein the TXOP includes a plurality of priority-based channel sensing periods and a transmission period; and

communicating, by the first wireless communication device, with a second wireless communication device associated with the first network operating entity during a first channel sensing period of the plurality of priority-based channel sensing periods in the TXOP corresponding to the access priority of the first network operating entity based on the dynamic priority information, a reservation for the shared spectrum in the transmission period of the TXOP.

2. The method of claim 1, wherein the TXOP further includes an acquisition period, and wherein the dynamic priority information is transmitted during the acquisition period.

3. The method of claim 1, wherein the communicating includes transmitting, by the first wireless communication device to the second wireless communication device during the first channel sensing period of the plurality of priority-based channel sensing periods corresponding to the access priority of the first network operating entity, the reservation for the shared spectrum in the transmission period.

4. The method of claim 1, wherein the dynamic priority information further indicates at least one of a duration of the TXOP, a number of the plurality of priority-based channel sensing periods in the TXOP, or a duration of each of the plurality of priority-based channel sensing periods.

5. The method of claim 1, wherein the transmitting the dynamic priority information includes transmitting a cyclically-shifted preamble sequence based on the access priority of the first network operating entity.

6. The method of claim 5, wherein the cyclically-shifted preamble sequence is a Zaddoff-Chu (ZC) root sequence cyclically shifted by a cyclic shift value associated with the access priority of the first network operating entity.

7. The method of claim 5, wherein the cyclically-shifted preamble sequence is a Zaddoff-Chu (ZC) root sequence cyclically shifted by a cyclic shift value associated with the first network operating entity and time-shifted by a timing offset associated with the access priority of the first network operating entity.

8. A method of wireless communication, comprising:

receiving, by a first wireless communication device from a second wireless communication device, dynamic priority information for accessing a shared spectrum in a transmission opportunity (TXOP), wherein the shared spectrum is shared by a plurality of network operating entities, wherein the first wireless communication device and the second wireless communication device are associated with a first network operating entity of the plurality of network operating entities, wherein the dynamic priority information indicates an access priority of the first network operating entity among the plurality of network operating entities in the TXOP, and wherein the TXOP includes a plurality of priority-based channel sensing periods and a transmission period; and

communicating, by the first wireless communication device, with the second wireless communication device during a first channel sensing period of the plurality of priority-based channel sensing periods in the TXOP corresponding to the access priority of the first network operating entity based on the dynamic priority information, a reservation for the shared spectrum in the transmission period of the TXOP.

9. The method of claim 8, wherein the TXOP further includes an acquisition period, and wherein the dynamic priority information is received in the acquisition period.

10. The method of claim 8, wherein the communicating includes receiving, from the second wireless communication device during the first channel sensing period of the plurality of priority-based channel sensing periods corresponding to the access priority of the first network operating entity, the reservation for the shared spectrum in the transmission period.

11. The method of claim 8, wherein the dynamic priority information further indicates at least one of a duration of the TXOP, a number of the plurality of priority-based channel sensing periods in the TXOP, or a duration of each of the plurality of priority-based channel sensing period.

12. The method of claim 8, wherein the receiving the dynamic priority information includes receiving a preamble signal carrying a cyclically-shifted preamble sequence indicating the access priority of the first network operating entity in the TXOP.

13. The method of claim 12, wherein the cyclically-shifted preamble sequence is a Zadoff-Chu (ZC) sequence.

14. The method of claim 13, further comprising:

determining, by the first wireless communication device, a cross-correlation signal between the preamble signal and a ZC root sequence; and

identifying, by the first wireless communication device, the access priority of the first network operating entity based on energy detection over a plurality of search windows within the cross-correlation signal, wherein the plurality of search windows are positioned based on a plurality of cyclic shifts corresponding to access priorities in the TXOP.

15. The method of claim 13, further comprising:

determining, by the first wireless communication device, a cross-correlation signal between the preamble signal and a ZC root sequence; and

identifying, by the first wireless communication device, the access priority of the first network operating entity based on energy detection over a plurality of sub-windows of a search window within the cross-correlation signal, wherein the search window is positioned based on a cyclic shift associated with the first network operating entity, and wherein the plurality of sub-windows corresponds to access priorities in the TXOP.

16. An apparatus comprising:

a transceiver configured to;

transmit dynamic priority information for accessing a shared spectrum in a transmission opportunity (TXOP), wherein the shared spectrum is shared by a plurality of network operating entities, wherein the apparatus is associated with a first network operating entity of the plurality of network operating entities, wherein the dynamic priority information indicates an access priority of the first network operating entity among the plurality of network operating entities in the TXOP, and wherein the TXOP includes a plurality of priority-based channel sensing periods and a transmission period; and

communicate with a wireless communication device associated with the first network operating entity during a first channel sensing period of the plurality of priority-based channel sensing periods in the TXOP corresponding to the access priority of the first network operating entity based on the dynamic priority information, a reservation for the shared spectrum in the transmission period of the TXOP.

17. The apparatus of claim 16, wherein the TXOP further includes an acquisition period and wherein the dynamic priority information is transmitted during the acquisition period.

18. The apparatus of claim 16, wherein the transceiver is further configured to communicate the reservation with the wireless communication device by transmitting, to the wireless communication device during the first channel sensing period of the plurality of priority-based channel sensing periods corresponding to the access priority of the first network operating entity, the reservation for the shared spectrum in the transmission period.

19. The apparatus of claim 16, wherein the dynamic priority information further indicates at least one of a duration of the TXOP, a number of the plurality of priority-based channel sensing periods in the TXOP, or a duration of each of the plurality of priority-based channel sensing periods.

20. The apparatus of claim 16, wherein the transceiver is further configured to transmit the dynamic priority information by transmitting a cyclically-shifted preamble sequence based on the access priority of the first network operating entity.

21. The apparatus of claim 20, wherein the cyclically-shifted preamble sequence is a Zaddoff-Chu (ZC) root sequence cyclically shifted by a cyclic shift value associated with the access priority of the first network operating entity.

22. The apparatus of claim 20, wherein the cyclically-shifted preamble sequence is a Zaddoff-Chu (ZC) root sequence cyclically shifted by a cyclic shift value associated with the first network operating entity and time-shifted by a timing offset associated with the access priority of the first network operating entity.

23. An apparatus comprising:

a transceiver configured to;

receive, from a wireless communication device, dynamic priority information for accessing a shared spectrum in a transmission opportunity (TXOP), wherein the shared spectrum is shared by a plurality of network operating entities, wherein the apparatus and the wireless communication device are associated with a first network operating entity of the plurality of network operating entities, wherein the dynamic priority information indicates an access priority of the first network operating entity among the plurality of network operating entities in the TXOP, and wherein the TXOP includes a plurality of priority-based channel sensing periods and a transmission period; and

communicate with the wireless communication device during a first channel sensing period of the plurality of priority-based channel sensing periods in the TXOP corresponding to the access priority of the first network operating entity based on the dynamic priority information, a reservation for the shared spectrum in the transmission period of the TXOP.

24. The apparatus of claim 23, wherein the TXOP includes an acquisition period, and wherein the dynamic priority information is received in the acquisition period.

25. The apparatus of claim 23, wherein the transceiver is further configured to communicate the reservation with the wireless communication device by receiving, from the wireless communication device during the first channel sensing period of the plurality of priority-based channel sensing periods corresponding to the access priority of the first network operating entity, the reservation for the shared spectrum in the transmission period.

26. The apparatus of claim 23, wherein the dynamic priority information further indicates at least one of a duration of the TXOP, a number of the plurality of priority-based channel sensing periods in the TXOP, or a duration of each of the plurality of priority-based channel sensing period.

27. The apparatus of claim 23, wherein the transceiver is further configured to receive the dynamic priority information by receiving a preamble signal carrying a cyclically-shifted preamble sequence indicating the access priority of the first network operating entity in the TXOP.

28. The apparatus of claim 27, wherein the cyclically-shifted preamble sequence is a Zadoff-Chu (ZC) sequence.

29. The apparatus of claim 28, further comprising a processor configured to:

determine a cross-correlation signal between the preamble signal and a ZC root sequence; and

identify the access priority of the first network operating entity based on energy detection over a plurality of search windows within the cross-correlation signal, wherein the plurality of search windows are positioned based on a plurality of cyclic shifts corresponding to access priorities in the TXOP.

30. The apparatus of claim 28, further comprising a processor configured to:

determine a cross-correlation signal between the preamble signal and a ZC root sequence; and

identify the access priority of the first network operating entity based on energy detection over a plurality of sub-windows of a search window within the cross-correlation signal, wherein the search window is positioned based on a cyclic shift associated with the first network operating entity, and wherein the plurality of sub-windows corresponds to access priorities in the TXOP.