Opportunistic reclaiming of resources in new radio-spectrum sharing (NR-SS)

• US 10,356,626 B2
• Filed: 06/28/2017
• Issued: 07/16/2019
• Est. Priority Date: 12/06/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Montojo, Juan, Yoo, Taesang, Zhang, Xiaoxia, Damnjanovic, Aleksandar, Mallik, Siddhartha
• Primary Examiner(s): Figueroa, Marisol
• Application Number:
  US15/636,372
• Publication Number:
  US 20180160313A1
• Time in Patent Office: 748 Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/56 based on priority criteria
• CPC Class Codes: H04W 74/006 in the downlink, i.e. towards the terminal
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• 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 reclaiming of resources in a shared frequency spectrum shared by multiple operators are provided. A first wireless communication device associated with a first operator of a plurality of operators identifies a transmission opportunity in a shared frequency spectrum shared by the plurality of operators, wherein the first operator has priority among the plurality of operators for accessing the shared frequency spectrum in the transmission opportunity. The first wireless communication device communicates with a second wireless communication device associated with the first operator, in the transmission opportunity without a prior reservation of the transmission opportunity.

Claims

1. A method of wireless communication, comprising:

identifying, by a first wireless communication device associated with a first operator of a plurality of operators, a transmission opportunity in a shared frequency spectrum shared by the plurality of operators, wherein the first operator has priority among the plurality of operators for accessing the shared frequency spectrum in the transmission opportunity and the transmission opportunity is not reserved by the first wireless communication device during a reservation indication slot of the transmission opportunity;

determining, by the first wireless communication device, that the transmission opportunity is reclaimable after the reservation indication slot; and

communicating, by the first wireless communication device, with a second wireless communication device associated with the first operator, in the transmission opportunity without a reservation of the transmission opportunity by the first wireless communication.

2. The method of claim 1, wherein the determining comprises:

monitoring for a reservation for the transmission opportunity from a lower priority operator; and

determining that the transmission opportunity is not reserved by the lower priority operator based on the monitoring.

3. The method of claim 1, wherein the determining comprises:

monitoring for a transmission in the transmission opportunity; and

determining that there is no transmission in the transmission opportunity based on the monitoring.

4. The method of claim 1, wherein the determining comprises:

detecting a transmission from a third wireless communication device associated with the first operator in the transmission opportunity; and

determining that the transmission from the third wireless communication device has a signal strength that is less than a predetermined threshold.

5. The method of claim 1, wherein the determining comprises:

detecting that a transmission from a third wireless communication device associated with the first operator in a first portion of the transmission opportunity has completed, wherein the communicating with the second wireless communication device is in a second portion of the transmission opportunity following the first portion.

6. The method of claim 5, wherein the detecting is based on at least one of a signal energy detection or a packet detection.

7. The method of claim 5, wherein the communicating with the second wireless communication device includes transmitting, in a third portion of the transmission opportunity, a reservation request signal to reserve the shared frequency spectrum in the second portion of the transmission opportunity.

8. The method of claim 7, wherein the communicating with the second wireless communication device further includes receiving, from the second wireless communication device in the third portion of the transmission opportunity, a reservation response signal in response to the reservation request signal.

9. The method of claim 8, wherein the third portion of the transmission opportunity is designated for a reservation signal transmission from a subset of wireless communication devices of the first operator including the first wireless communication device.

10. The method of claim 1, further comprising:

detecting, by the first wireless communication device in a first portion of another transmission opportunity, that a transmission from a second operator of the plurality of operators has completed, wherein the second operator has a higher priority than the first operator for accessing the shared frequency spectrum in the another transmission opportunity; and

communicating, by the first wireless communication device, with a third wireless communication device associated with the first operator in a second portion of the another transmission opportunity following the first portion.

11. The method of claim 10, wherein the first operator has a second highest priority among the plurality of operators for accessing the shared frequency spectrum in the another transmission opportunity.

12. An apparatus comprising:

a processor configured to identify a transmission opportunity in a shared frequency spectrum shared by a plurality of operators, wherein the apparatus is associated with a first operator of a plurality of operators, and wherein the first operator has priority among the plurality of operators for accessing the shared frequency spectrum in the transmission opportunity and the transmission opportunity is not reserved by the apparatus during a reservation indication slot of the transmission opportunity;

the processor further configured to determine that the transmission opportunity is reclaimable after the reservation indication slot; and

a transceiver configured to communicate with a second wireless communication device associated with the first operator, in the transmission opportunity without a reservation of the transmission opportunity by the apparatus.

13. The apparatus of claim 12, wherein the processor is further configured to determine that the transmission opportunity is reclaimable for the communicating by:

monitoring for a reservation for the transmission opportunity from a lower priority operator; and

determining that the transmission opportunity is not reserved by the lower priority operator based on the monitoring.

14. The apparatus of claim 12, wherein the processor is further configured to determine that the transmission opportunity is reclaimable for the communicating by:

monitoring for a transmission in the transmission opportunity; and

determining that there is no transmission in the transmission opportunity based on the monitoring.

15. The apparatus of claim 12, wherein the processor is further configured to determine that the transmission opportunity is reclaimable for the communicating by:

detecting a transmission from a third wireless communication device associated with the first operator in the transmission opportunity; and

determining that the transmission from the third wireless communication device has a signal strength that is less than a predetermined threshold.

16. The apparatus of claim 12, wherein the processor is further configured to determine that the transmission opportunity is reclaimable for the communicating by detecting that a transmission from a third wireless communication device associated with the first operator in a first portion of the transmission opportunity has completed, and wherein the communicating with the second wireless communication device is in a second portion of the transmission opportunity following the first portion.

17. The apparatus of claim 16, wherein the processor is further configured to detect that the transmission from the third wireless communication device associated with the first operator in the first portion of the transmission opportunity has completed based on at least one of a signal energy detection or a packet detection.

18. The apparatus of claim 16, wherein the transceiver is further configured to communicate with the second wireless communication device by transmitting, in a third portion of the transmission opportunity, a reservation request signal to reserve the shared frequency spectrum in the second portion of the transmission opportunity.

19. The apparatus of claim 18, wherein the transceiver is further configured to communicate with the second wireless communication device by receiving, from the second wireless communication device in the third portion of the transmission opportunity, a reservation response signal in response to the reservation request signal.

20. The apparatus of claim 19, wherein the third portion of the transmission opportunity is designated for a reservation signal transmission from a subset of wireless communication devices of the first operator including the apparatus.

21. The apparatus of claim 12, wherein the processor is further configured to detect, in a first portion of another transmission opportunity, that a transmission from a second operator of the plurality of operators has completed, wherein the second operator has a higher priority than the first operator for accessing the shared frequency spectrum in the another transmission opportunity, and wherein the transceiver is further configured to communicate with a third wireless communication device associated with the first operator in a second portion of the another transmission opportunity following the first portion.

22. The apparatus of claim 21, wherein the first operator has a second highest priority among the plurality of operators for accessing the shared frequency spectrum in the another transmission opportunity.

23. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

code for causing a first wireless communication device associated with a first operator of a plurality of operators to identify a transmission opportunity in a shared frequency spectrum shared by the plurality of operators, wherein the first operator has priority among the plurality of operators for accessing the shared frequency spectrum in the transmission opportunity and the transmission opportunity is not reserved by the first wireless communication device during a reservation indication slot of the transmission opportunity;

code for causing the first wireless communication device to determine that the transmission opportunity is reclaimable after the reservation indication slot; and

code for causing the first wireless communication device to communicate with a second wireless communication device associated with the first operator, in the transmission opportunity without a reservation of the transmission opportunity by the first wireless communication device.

24. The non-transitory computer-readable medium of claim 23, wherein the code for causing the first wireless communication device to determine that the transmission opportunity is reclaimable for the communicating is further configured to:

monitor for a reservation for the transmission opportunity from a lower priority operator; and

determine that the transmission opportunity is not reserved by the lower priority operator based on the monitoring.

25. The non-transitory computer-readable medium of claim 23, wherein the code for causing the first wireless communication device to determine that the transmission opportunity is reclaimable for the communicating is further configured to:

monitor for a transmission in the transmission opportunity; and

determine that there is no transmission in the transmission opportunity based on the monitoring.

26. The non-transitory computer-readable medium of claim 23, wherein the code for causing the first wireless communication device to determine that the transmission opportunity is reclaimable for the communicating is further configured to:

detect a transmission from a third wireless communication device associated with the first operator in the transmission opportunity; and

determine that the transmission from the third wireless communication device has a signal strength that is less than a predetermined threshold.

27. The non-transitory computer-readable medium of claim 23, wherein the code for causing the first wireless communication device to determine that the transmission opportunity is reclaimable for the communicating is further configured to detect that a transmission from a third wireless communication device associated with the first operator in a first portion of the transmission opportunity has completed, wherein the communicating with the second wireless communication device is in a second portion of the transmission opportunity following the first portion.

28. The non-transitory computer-readable medium of claim 27, wherein the code for communicating with the second wireless communication device is further configured to transmit, in a third portion of the transmission opportunity, a reservation request signal to reserve the shared frequency spectrum in the second portion of the transmission opportunity.

29. The non-transitory computer-readable medium of claim 28, wherein the code for communicating with the second wireless communication device is further configured to receive, from the second wireless communication device in the third portion of the transmission opportunity, a reservation response signal in response to the reservation request signal.

30. The non-transitory computer-readable medium of claim 23, further comprising:

code for causing the first wireless communication device to detect, in a first portion of another transmission opportunity, that a transmission from a second operator of the plurality of operators has completed, wherein the second operator has a higher priority than the first operator for accessing the shared frequency spectrum in the another transmission opportunity; and

code for causing the first wireless communication device to communicate with a third wireless communication device associated with the first operator in a second portion of the another transmission opportunity following the first portion.