TECHNIQUES FOR CONTENDING FOR ACCESS TO A RADIO FREQUENCY SPECTRUM BAND USING A COORDINATED LISTEN BEFORE TALK PROCEDURE

• US 20180103472A1
• Filed: 04/12/2017
• Published: 04/12/2018
• Est. Priority Date: 10/12/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Xiaoxia, Montojo, Juan, Yoo, Taesang, Mallik, Siddhartha, Damnjanovic, Aleksandar, Fan, Michael Mingxi
• Granted Patent: US 10,536,944 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 5/0055 Physical resource allocation for ACK/NACK for physical mapping arrangements in ARQ protocols H04L1/1861
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• 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 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/56 based on priority criteria
• 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

Techniques are described for wireless communication at a wireless device. One method includes identifying a priority of the wireless device for a transmission interval of a radio frequency spectrum band shared by a plurality of network operating entities; identifying an absence of a predetermined transmission type in each of a number of clear channel assessment (CCA) slots of the transmission interval, in which each of the number of CCA slots is associated with a higher priority than the identified priority of the wireless device; and communicating over the radio frequency spectrum band based at least in part on the identified absence of the predetermined transmission type in each of the number of CCA slots associated with the higher priority than the priority of the wireless device.

Claims

1. A method for wireless communication at a wireless device, comprising:

identifying a priority of the wireless device for a transmission interval of a radio frequency spectrum band shared by a plurality of network operating entities;

identifying an absence of a predetermined transmission type in each of a number of clear channel assessment (CCA) slots of the transmission interval, each of the number of CCA slots associated with a higher priority than the identified priority of the wireless device; and

communicating over the radio frequency spectrum band based at least in part on the identified absence of the predetermined transmission type in each of the number of CCA slots associated with the higher priority than the priority of the wireless device.

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

transmitting a preamble over the radio frequency spectrum band, the preamble transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device; and

transmitting or receiving data over the radio frequency spectrum band during the transmission interval.

3. The method of claim 2, further comprising:

signaling a length of the transmission interval in the preamble.

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

transmitting a reservation message over the radio frequency spectrum band, the reservation message transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device;

detecting, in the CCA slot, an acknowledgement message transmitted over the radio frequency spectrum band in response to the reservation message; and

transmitting or receiving data over the radio frequency spectrum band, during the transmission interval, based at least in part on the detecting of the acknowledgement message.

5. The method of claim 4, wherein the reservation message comprises a Request to Send (RTS) message and the acknowledgement message comprises a Clear to Send (CTS) message.

6. The method of claim 1, wherein the predetermined transmission type comprises at least one of:

a preamble, a reservation message, a Request to Send (RTS) message, an acknowledgement message, a Clear to Send (CTS) message, or a combination thereof.

7. The method of claim 1, wherein the transmission interval is a first transmission interval, the method further comprising:

identifying a second priority of the wireless device for a second transmission interval of the radio frequency spectrum band, the second priority different from the priority of the wireless device for the first transmission interval.

8. The method of claim 1, further comprising:

monitoring the radio frequency spectrum band during each of the number of CCA slots.

9. An apparatus for wireless communication at a wireless device, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

identify a priority of the wireless device for a transmission interval of a radio frequency spectrum band shared by a plurality of network operating entities;

identify an absence of a predetermined transmission type in each of a number of clear channel assessment (CCA) slots of the transmission interval, each of the number of CCA slots associated with a higher priority than the identified priority of the wireless device; and

communicate over the radio frequency spectrum band based at least in part on the identified absence of the predetermined transmission type in each of the number of CCA slots associated with the higher priority than the priority of the wireless device.

10. The apparatus of claim 9, wherein the instructions to cause the apparatus to communicate comprise instructions to cause the apparatus to:

transmit a preamble over the radio frequency spectrum band, the preamble transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device; and

transmit or receive data over the radio frequency spectrum band during the transmission interval.

11. The apparatus of claim 10, wherein the instructions, when executed by the processor, cause the apparatus to:

signal a length of the transmission interval in the preamble.

12. The apparatus of claim 9, wherein the instructions to cause the apparatus to communicate comprise instructions to cause the apparatus to:

transmit a reservation message over the radio frequency spectrum band, the reservation message transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device;

detect, in the CCA slot, an acknowledgement message transmitted over the radio frequency spectrum band in response to the reservation message; and

transmit or receive data over the radio frequency spectrum band, during the transmission interval, based at least in part on the detecting of the acknowledgement message.

13. The apparatus of claim 12, wherein the reservation message comprises a Request to Send (RTS) message and the acknowledgement message comprises a Clear to Send (CTS) message.

14. The apparatus of claim 9, wherein the predetermined transmission type comprises at least one of:

a preamble, a reservation message, a Request to Send (RTS) message, an acknowledgement message, a Clear to Send (CTS) message, or a combination thereof.

15. The apparatus of claim 9, wherein the transmission interval is a first transmission interval, the instructions, when executed by the processor, further causing the apparatus to:

identify a second priority of the wireless device for a second transmission interval of the radio frequency spectrum band, the second priority different from the priority of the wireless device for the first transmission interval.

16. The apparatus of claim 9, wherein the instructions, when executed by the processor, cause the apparatus to:

monitor the radio frequency spectrum band during each of the number of CCA slots.

17. An apparatus for wireless communication at a wireless device, comprising:

means for identifying a priority of the wireless device for a transmission interval of a radio frequency spectrum band shared by a plurality of network operating entities;

means for identifying an absence of a predetermined transmission type in each of a number of clear channel assessment (CCA) slots of the transmission interval, each of the number of CCA slots associated with a higher priority than the identified priority of the wireless device; and

means for communicating over the radio frequency spectrum band based at least in part on the identified absence of the predetermined transmission type in each of the number of CCA slots associated with the higher priority than the priority of the wireless device.

18. The apparatus of claim 17, wherein the means for communicating comprises:

means for transmitting a preamble over the radio frequency spectrum band, the preamble transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device; and

means for transmitting or receiving data over the radio frequency spectrum band during the transmission interval.

19. The apparatus of claim 18, further comprising:

means for signaling a length of the transmission interval in the preamble.

20. The apparatus of claim 17, wherein the means for communicating comprises:

means for transmitting a reservation message over the radio frequency spectrum band, the reservation message transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device;

means for detecting, in the CCA slot, an acknowledgement message transmitted over the radio frequency spectrum band in response to the reservation message; and

means for transmitting or receiving data over the radio frequency spectrum band, during the transmission interval, based at least in part on the detecting of the acknowledgement message.

21. The apparatus of claim 20, wherein the reservation message comprises a Request to Send (RTS) message and the acknowledgement message comprises a Clear to Send (CTS) message.

22. The apparatus of claim 17, wherein the predetermined transmission type comprises at least one of:

a preamble, a reservation message, a Request to Send (RTS) message, an acknowledgement message, a Clear to Send (CTS) message, or a combination thereof.

23. The apparatus of claim 17, wherein the transmission interval is a first transmission interval, the apparatus further comprising:

means for identifying a second priority of the wireless device for a second transmission interval of the radio frequency spectrum band, the second priority different from the priority of the wireless device for the first transmission interval.

24. The apparatus of claim 17, further comprising:

means for monitoring the radio frequency spectrum band during each of a number of CCA slots.

25. A non-transitory computer-readable medium storing code for wireless communication at a wireless device, the code comprising instructions executable to:

identify a priority of the wireless device for a transmission interval of a radio frequency spectrum band shared by a plurality of network operating entities;

identify an absence of a predetermined transmission type in each of a number of clear channel assessment (CCA) slots of the transmission interval, each of the number of CCA slots associated with a higher priority than the identified priority of the wireless device; and

communicate over the radio frequency spectrum band based at least in part on the identified absence of the predetermined transmission type in each of the number of CCA slots associated with the higher priority than the priority of the wireless device.

26. The non-transitory computer-readable medium of claim 25, wherein when the instructions are executed to communicate, the instructions are further executable to:

transmit a preamble over the radio frequency spectrum band, the preamble transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device; and

transmit or receive data over the radio frequency spectrum band during the transmission interval.

27. The non-transitory computer readable medium of claim 26, wherein the instructions are further executable to:

signal a length of the transmission interval in the preamble.

28. The non-transitory computer readable medium of claim 25, wherein when the instructions are executed to communicate, the instructions are further executable to:

transmit a reservation message over the radio frequency spectrum band, the reservation message transmitted in a CCA slot of the transmission interval, the CCA slot associated with the priority of the wireless device;

detect, in the CCA slot, an acknowledgement message transmitted over the radio frequency spectrum band in response to the reservation message; and

transmit or receive data over the radio frequency spectrum band, during the transmission interval, based at least in part on the detecting of the acknowledgement message.

29. The non-transitory computer readable medium of claim 28, wherein the reservation message comprises a Request to Send (RTS) message and the acknowledgement message comprises a Clear to Send (CTS) message.

30. The non-transitory computer readable medium of claim 25, wherein, the transmission interval is a first transmission interval, and wherein the instruction are further executable to:

identify a second priority of the wireless device for a second transmission interval of the radio frequency spectrum band, the second priority different from the priority of the wireless device for the first transmission interval.