NODE-SPECIFIC MEDIUM RESERVATION FOR SPECTRUM SHARING

• US 20180249380A1
• Filed: 01/30/2018
• Published: 08/30/2018
• Est. Priority Date: 02/27/2017
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Xiaoxia, Kadous, Tamer, Yoo, Taesang
• Granted Patent: US 10,477,437 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/12 using signalling between network elements
• CPC Class Codes: H04W 28/26 Resource reservation
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 74/0875 with assigned priorities based access
• CPC Class Codes: H04W 8/24 Transfer of terminal data

Abstract

Wireless communications systems and methods related to sharing a spectrum using node-specific medium reservation signals are provided. A first wireless communication device a first configuration designated to the first wireless communication device. The first configuration indicates at least one waveform for representing reservation information. The first wireless communication device transmits a reservation signal to reserve a transmission opportunity (TXOP) in a shared spectrum. The reservation signal includes a first waveform representing corresponding first reservation information based on the first configuration. The first waveform is associated with a root sequence and a cyclic-shift value. The first reservation information indicates a transmit power level of the reservation signal. The first reservation information indicates an interference tolerance level of the first wireless communication device. The first reservation information indicates a reserved duration within the TXOP.

Claims

1. A method of wireless communication, comprising:

obtaining, by a first wireless communication device, a first configuration designated to the first wireless communication device, wherein the first configuration indicates at least one waveform for representing reservation information; and

transmitting, by the first wireless communication device, a reservation signal to reserve a transmission opportunity (TXOP) in a shared spectrum, wherein the reservation signal includes a first waveform representing corresponding first reservation information based on the first configuration.

2. The method of claim 1, wherein the first waveform is associated with a root sequence and a cyclic-shift value.

3. The method of claim 1, wherein the first reservation information indicates at least one of a transmit power level of the reservation signal, an interference tolerance level of the first wireless communication device, or a first resource allocated to the first wireless communication device, and wherein the transmitting the reservation signal includes transmitting the reservation signal using the first resource when the first reservation information indicates the first resource.

4. The method of claim 1, further comprising:

communicating, by the first wireless communication device with a second wireless communication device, a reservation request (RRQ) signal, wherein the reservation signal is a reservation response (RRS) signal transmitted in response to the RRQ signal, wherein the shared spectrum is shared by a first network operating entity and a second network operating entity, and wherein the first wireless communication device and the second wireless communication device are associated with the first network operating entity; and

communicating, by the first wireless communication device with the second wireless communication device over the shared spectrum, data during the TXOP.

5. The method of claim 4, wherein the first reservation information indicates a reserved duration within the TXOP, and wherein the communicating the data includes communicating the data during the reserved duration within the TXOP.

6. The method of claim 4, further comprising:

obtaining, by the first wireless communication device, a second configuration designated to a third wireless communication device associated with the first network operating entity;

transmitting, by the first wireless communication device, another RRQ signal in another TXOP for communication with the third wireless communication device; and

monitoring, by the first wireless communication device, for an RRS signal from the third wireless communication device according to the second configuration.

7. The method of claim 6, further comprising refraining, by the first wireless communication device, from communicating with the third wireless communication device over the shared spectrum during the another TXOP when there is no RRS signal detected from the third wireless communication device based on an energy threshold comparison.

8. The method of claim 1, wherein the first wireless communication device is associated with a first priority, and wherein the method further comprises:

obtaining, by the first wireless communication device, a second configuration designated to a second wireless communication device associated with a second priority higher than the first priority;

obtaining, by the first wireless communication device, a third configuration designated to a third wireless communication device associated with the second priority;

monitoring, by the first wireless communication device, for an RRS signal from the second wireless communication device reserving another TXOP in the shared spectrum according to the second configuration; and

monitoring, by the first wireless communication device, for an RRS signal from the third wireless communication device reserving the another TXOP in the shared spectrum according to the third configuration.

9. The method of claim 8, wherein the second configuration indicates a second waveform and a second resource, wherein the third configuration indicates a third waveform and a third resource, and wherein at least one of:

the second resource is different from the third resource;

or

the second waveform is different from the third waveform.

10. The method of claim 9, wherein the second waveform represents second reservation information, wherein the third waveform represents third reservation information, and wherein the method further comprises:

determining, by the first wireless communication device, that a first RRS energy of the RRS signal from the second wireless communication device reserving another TXOP is greater than a second RRS energy of the RRS signal from the third wireless communication device reserving the another TXOP; and

determining, by the first wireless communication device, whether to yield access to the shared spectrum during the another TXOP or transmit data in the shared spectrum during the another TXOP based on at least one of the first RRS energy or the second reservation information.

11. An apparatus comprising:

a processor configured to obtain a first configuration designated to the apparatus, wherein the first configuration indicates at least one waveform for representing reservation information; and

a transceiver configured to transmit a reservation signal to reserve a transmission opportunity (TXOP) in a shared spectrum, wherein the reservation signal includes a first waveform representing corresponding first reservation information based on the first configuration.

12. The apparatus of claim 11, wherein the first waveform is associated with a root sequence and a cyclic-shift value.

13. The apparatus of claim 11, wherein the first reservation information indicates at least one of a transmit power level of the reservation signal, an interference tolerance level of the apparatus, or a first resource allocated to the apparatus, and wherein the transceiver is further configured to transmit the reservation signal by transmitting the reservation signal using the first resource when the first reservation information indicates the first resource.

14. The apparatus of claim 11, wherein the transceiver is further configured to:

communicate, with a second wireless communication device, a reservation request (RRQ) signal, wherein the reservation signal is a reservation response (RRS) signal transmitted in response to the RRQ signal, wherein the shared spectrum is shared by a first network operating entity and a second network operating entity, and wherein the apparatus and the second wireless communication device are associated with the first network operating entity; and

communicate, with the second wireless communication device over the shared spectrum, data during the TXOP.

15. The apparatus of claim 14, wherein the first reservation information indicates a reserved duration within the TXOP, and wherein the transceiver is further configured to communicate the data by communicating the data during the reserved duration within the TXOP.

16. The apparatus of claim 14, wherein the transceiver is further configured to transmit another RRQ signal in another TXOP for communication with a third wireless communication device, and wherein the processor is further configured to:

obtain a second configuration designated to the third wireless communication device associated with the first network operating entity; and

monitor for an RRS signal from the third wireless communication device according to the second configuration.

17. The apparatus of claim 16, wherein the processor is further configured to refrain from communicating with the third wireless communication device over the shared spectrum during the another TXOP when there is no RRS signal detected from the third wireless communication device based on an energy threshold comparison.

18. The apparatus of claim 11, wherein the apparatus is associated with a first priority, and wherein the processor is further configured to:

obtain a second configuration designated to a second wireless communication device associated with a second priority higher than the first priority;

obtain a third configuration designated to a third wireless communication device associated with the second priority;

monitor for an RRS signal from the second wireless communication device reserving another TXOP in the shared spectrum according to the second configuration; and

monitor for an RRS signal from the third wireless communication device reserving the another TXOP in the shared spectrum according to the third configuration.

19. The apparatus of claim 18, wherein the second configuration indicates a second waveform and a second resource, wherein the third configuration indicates a third waveform and a third resource, and wherein at least one of:

the second resource is different from the third resource;

or

the second waveform is different from the third waveform.

20. The apparatus of claim 19, wherein the second waveform represents second reservation information, wherein the third waveform represents third reservation information, and wherein the processor is further configured to:

determine that a first RRS energy of the RRS signal from the second wireless communication device reserving another TXOP is greater than a second RRS energy of the RRS signal from the third wireless communication device reserving the another TXOP; and

determine whether to yield access to the shared spectrum during the another TXOP or transmit data during the another TXOP based on at least one of the first RRS energy or the second reservation information.

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

code for causing a first wireless communication device to obtain a first configuration designated to the first wireless communication device, wherein the first configuration indicates at least one waveform for representing reservation information; and

code for causing the first wireless communication device to transmit a reservation signal to reserve a transmission opportunity (TXOP) in a shared spectrum, wherein the reservation signal includes a first waveform representing corresponding first reservation information based on the first configuration.

22. The computer-readable medium of claim 21, wherein the first waveform is associated with a root sequence and a cyclic-shift value.

23. The computer-readable medium of claim 21, wherein the first reservation information indicates at least one a transmit power level of the reservation signal, an interference tolerance level of the first wireless communication device, or a first resource allocated to the first wireless communication device, and wherein the code for causing the first wireless communication device to transmit the reservation signal is further configured to transmit the reservation signal using the first resource when the first reservation information indicates the first resource.

24. The computer-readable medium of claim 21, further comprising:

code for causing the first wireless communication device to communicate, with a second wireless communication device, a reservation request (RRQ) signal, wherein the reservation signal is a reservation response (RRS) signal transmitted in response to the RRQ signal, wherein the shared spectrum is shared by a first network operating entity and a second network operating entity, and wherein the first wireless communication device and the second wireless communication device are associated with the first network operating entity; and

code for causing the first wireless communication device to communicate, with the second wireless communication device over the shared spectrum, data during the TXOP.

25. The computer-readable medium of claim 24, wherein the first reservation information indicates a reserved duration within the TXOP, and wherein the code for causing the first wireless communication device to communicate the data is further configured to communicate the data during the reserved duration within the TXOP.

26. The computer-readable medium of claim 24, further comprising:

code for causing the first wireless communication device to obtain a second configuration designated to a third wireless communication device associated with the first network operating entity;

code for causing the first wireless communication device to transmit another RRQ signal in another TXOP for communication with the third wireless communication device; and

code for causing the first wireless communication device to monitor for an RRS signal from the third wireless communication device according to the second configuration.

27. The computer-readable medium of claim 26, further comprising code for causing the first wireless communication device to refrain from communicating with the third wireless communication device over the shared spectrum during the another TXOP when there is no RRS signal detected from the third wireless communication device based on an energy threshold comparison.

28. The computer-readable medium of claim 21, wherein the first wireless communication device is associated with a first priority, and wherein the computer-readable medium further comprises:

code for causing the first wireless communication device to obtain a second configuration designated to a second wireless communication device associated with a second priority higher than the first priority;

code for causing the first wireless communication device to obtain a third configuration designated to a third wireless communication device associated with the second priority;

code for causing the first wireless communication device to monitor for an RRS signal from the second wireless communication device reserving another TXOP in the shared spectrum according to the second configuration; and

code for causing the first wireless communication device to monitor for an RRS signal from the third wireless communication device reserving the another TXOP in the shared spectrum according to the third configuration.

29. The computer-readable medium of claim 28, wherein the second configuration indicates a second waveform and a second resource, wherein the third configuration indicates a third waveform and a third resource, and wherein at least one of:

the second resource is different from the third resource;

or

the second waveform is different from the third waveform.

30. The computer-readable medium of claim 29, wherein the second waveform represents second reservation information, wherein the third waveform represents third reservation information, and wherein the computer-readable medium further comprises:

code for causing the first wireless communication device to determine that a first RRS energy of the RRS signal from the second wireless communication device reserving another TXOP is greater than a second RRS energy of the RRS signal from the third wireless communication device reserving the another TXOP; and

code for causing the first wireless communication device to determine whether to yield access to the shared spectrum during the another TXOP or transmit data during the another TXOP based on at least one of the first RRS energy or the second reservation information.