Enhanced channel reservation for co-existence on a shared communication medium

• US 10,219,300 B2
• Filed: 08/18/2016
• Issued: 02/26/2019
• Est. Priority Date: 08/19/2015
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Gorokhov, Alexei, Gaal, Peter, Valliappan, Nachiappan, Patel, Chirag, Sadek, Ahmed, Banister, Brian, Luo, Tao, Kadous, Tamer
• Primary Examiner(s): Masur, Paul H
• Application Number:
  US15/240,476
• Publication Number:
  US 20170055291A1
• Time in Patent Office: 922 Days
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/005 of common pilots, i.e. pilots destined for multiple users or terminals
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 74/002 Transmission of channel access control information
• CPC Class Codes: H04W 74/0816 with collision avoidance
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

Techniques for reservation coordination on a shared communication medium are disclosed. An access point, for example, may contend for access to a communication medium, and transmit a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the communication medium for a transmission opportunity (TXOP) duration based on the contending. The access point may then transmit, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

Claims

1. A wireless communication method, comprising:

contending for access to a shared wireless communication medium;

transmitting, on the shared wireless communication medium, a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the shared wireless communication medium for a transmission opportunity (TXOP) duration based on the contending; and

transmitting, on the shared wireless communication medium, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

2. The method of claim 1, wherein the reservation coordination signal comprises an operator identifier signature that identifies an operator associated with the reserved TXOP duration.

3. The method of claim 2, wherein the transmitting of the reservation coordination signal comprises broadcasting a Public Land Mobile Network Identifier (PLMN ID) corresponding to the operator associated with the reserved TXOP duration.

4. The method of claim 2, wherein the transmitting of the reservation coordination signal comprises broadcasting a Channel State Information Reference Signal (CSI-RS) that is scrambled with a Public Land Mobile Network Identifier (PLMN ID) corresponding to the operator associated with the reserved TXOP duration.

5. The method of claim 1, wherein the reservation coordination signal comprises a duration timer that indicates a remaining duration of the reserved TXOP duration.

6. The method of claim 1, wherein the reservation coordination signal comprises a reuse indicator identifying a resource reuse scheme.

7. The method of claim 6, wherein the reuse indicator comprises one or more hard reuse bits that identify whether intra-operator reuse is acceptable for the reserved TXOP duration.

8. The method of claim 6, wherein the reuse indicator comprises one or more soft reuse bits that identify one or more conditions under which intra-operator reuse is acceptable for the reserved TXOP duration.

9. The method of claim 1, wherein the reservation coordination signal is transmitted in a control region of one or more subframes of a Time Division Duplexing (TDD) frame structure.

10. The method of claim 1, wherein:

the first RAT comprises Wi-Fi technology; and

the second RAT comprises Long Term Evolution (LTE) technology.

11. An apparatus for wireless communication, comprising:

at least one processor;

at least one memory coupled to the at least one processor, the at least one processor and the at least one memory being configured to contend for access to a shared wireless communication medium; and

at least one transceiver configured to;

transmit, on the shared wireless communication medium, a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the shared wireless communication medium for a transmission opportunity (TXOP) duration based on the contending, and

transmit, on the shared wireless communication medium, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

12. The apparatus of claim 11, wherein the reservation coordination signal comprises an operator identifier signature that identifies an operator associated with the reserved TXOP duration.

13. The apparatus of claim 12, wherein the at least one transceiver is configured to transmit the reservation coordination signal by broadcasting a Public Land Mobile Network Identifier (PLMN ID) corresponding to the operator associated with the reserved TXOP duration.

14. The apparatus of claim 12, wherein the at least one transceiver is configured to transmit the reservation coordination signal by broadcasting a Channel State Information Reference Signal (CSI-RS) that is scrambled with a Public Land Mobile Network Identifier (PLMN ID) corresponding to the operator associated with the reserved TXOP duration.

15. The apparatus of claim 11, wherein the reservation coordination signal comprises a duration timer that indicates a remaining duration of the reserved TXOP duration.

16. The apparatus of claim 11, wherein the reservation coordination signal comprises a reuse indicator identifying a resource reuse scheme.

17. The apparatus of claim 16, wherein the reuse indicator comprises one or more hard reuse bits that identify whether intra-operator reuse is acceptable for the reserved TXOP duration.

18. The apparatus of claim 16, wherein the reuse indicator comprises one or more soft reuse bits that identify one or more conditions under which intra-operator reuse is acceptable for the reserved TXOP duration.

19. The apparatus of claim 11, wherein the at least one transceiver is configured to transmit the reservation coordination signal in a control region of one or more subframes of a Time Division Duplexing (TDD) frame structure.

20. The apparatus of claim 11, wherein:

the first RAT comprises Wi-Fi technology; and

the second RAT comprises Long Term Evolution (LTE) technology.

21. An apparatus for wireless communication, comprising:

means for contending for access to a shared wireless communication medium;

means for transmitting, on the shared wireless communication medium, a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the shared wireless communication medium for a transmission opportunity (TXOP) duration based on the contending; and

means for transmitting, on the shared wireless communication medium, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

22. The apparatus of claim 21, wherein the reservation coordination signal comprises an operator identifier signature that identifies an operator associated with the reserved TXOP duration.

23. The apparatus of claim 22, wherein the means for transmitting the reservation coordination signal comprises:

means for broadcasting a Public Land Mobile Network Identifier (PLMN ID) corresponding to the operator associated with the reserved TXOP duration, or

means for broadcasting a Channel State Information Reference Signal (CSI-RS) that is scrambled with a PLMN ID corresponding to the operator associated with the reserved TXOP duration.

24. The apparatus of claim 21, wherein the reservation coordination signal comprises a duration timer that indicates a remaining duration of the reserved TXOP duration.

25. The apparatus of claim 21, wherein the reservation coordination signal comprises a reuse indicator identifying a resource reuse scheme.

26. A non-transitory computer-readable medium comprising code, which, when executed by a processor, causes the processor to perform operations for wireless communication, the non-transitory computer-readable medium comprising:

code for contending for access to a shared wireless communication medium;

code for transmitting, on the shared wireless communication medium, a channel reservation message in accordance with a first Radio Access Technology (RAT) to reserve the shared wireless communication medium for a transmission opportunity (TXOP) duration based on the contending; and

code for transmitting, on the shared wireless communication medium, during the reserved TXOP duration, a reservation coordination signal in accordance with a second RAT to convey reservation coordination information associated with the reserved TXOP duration.

27. The non-transitory computer-readable medium of claim 26, wherein the reservation coordination signal comprises an operator identifier signature that identifies an operator associated with the reserved TXOP duration.

28. The non-transitory computer-readable medium of claim 27, wherein the code for transmitting the reservation coordination signal comprises:

code for broadcasting a Public Land Mobile Network Identifier (PLMN ID) corresponding to the operator associated with the reserved TXOP duration, or

code for broadcasting a Channel State Information Reference Signal (CSI-RS) that is scrambled with a PLMN ID corresponding to the operator associated with the reserved TXOP duration.

29. The non-transitory computer-readable medium of claim 26, wherein the reservation coordination signal comprises a duration timer that indicates a remaining duration of the reserved TXOP duration.

30. The non-transitory computer-readable medium of claim 26, wherein the reservation coordination signal comprises a reuse indicator identifying a resource reuse scheme.