OPPORTUNISTIC ASYNCHRONOUS OPERATION FOR COORDINATED NR-SS

• US 20180139782A1
• Filed: 11/09/2017
• Published: 05/17/2018
• Est. Priority Date: 11/11/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sadek, Ahmed, Damnjanovic, Aleksandar, Xue, Yisheng, Fan, Michael Mingxi
• Granted Patent: US 10,687,358 B2
• Time in Patent Office: Days
• CPC Class Codes: H04L 12/413 with random access, e.g. carrier-sense multiple-access with collision detection [CSMA-CD]
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 74/0816 with collision avoidance

Abstract

An opportunistic asynchronous operation for coordinated new radio (NR) shared spectrum (NR-SS) operations is discussed. In a wireless network having at least one contention-based shared channel in which communications are configured having one or more control intervals time division multiplexed with one or more data intervals for transmission opportunities, a base station receives data for communication at a time during a current data interval on a contention-based shared channel. The base station will review its received signals on the contention-based shared channel during the previous control interval located immediately prior to the current data interval. If none of the received signals indicate a contention-resolution of the contention-based shared channel, the base station may begin an attempted transmission by performing an abbreviated clear channel assessment (CCA). If the CCA is detected as clear, the data may be transmitted.

Claims

1. A method of wireless communication in a wireless network having at least one contention-based shared channel in which communications are configured having one or more control intervals time division multiplexed with one or more data intervals for transmission opportunities, the method comprising:

receiving, at a base station, data for communication, wherein the data is received at a time during a current data interval on a contention-based shared channel;

reviewing received signals on the contention-based shared channel during a previous control interval located immediately prior to the current data interval;

in response to none of the received signals indicating a contention-resolution of the contention-based shared channel, performing an abbreviated clear channel assessment (CCA); and

transmitting the data in response to a successful completion of the abbreviated CCA.

2. The method of claim 1, wherein the transmitting the data includes transmitting the data until an end of the current data interval.

3. The method of claim 2, wherein the transmitting the data begins at a next transmit time interval (TTI).

4. The method of claim 1, wherein the base station is operated by a network operator having a higher priority to the contention-based shared channel than one or more base stations operated by another network operator.

5. The method of claim 4, further including:

performing, by the base station, a full CCA at a beginning of a next data interval; and

continuing transmission of the data in response to success of the full CCA.

6. The method of claim 1,

wherein the base station is operated by a network operator having a lower priority to the contention-based shared channel than one or more base stations operated by another network operator, and

wherein the transmitting the data begins at a next slot boundary of the transmission opportunity.

7. An apparatus configured for wireless communication in a wireless network having at least one contention-based shared channel in which communications are configured having one or more control intervals time division multiplexed with one or more data intervals for transmission opportunities, comprising:

means for receiving, at a base station, data for communication, wherein the data is received at a time during a current data interval on a contention-based shared channel;

means for reviewing received signals on the contention-based shared channel during a previous control interval located immediately prior to the current data interval;

means, executable in response to none of the received signals indicating a contention-resolution of the contention-based shared channel, for performing an abbreviated clear channel assessment (CCA); and

means for transmitting the data in response to a successful completion of the abbreviated CCA.

8. The apparatus of claim 7, wherein the means for transmitting the data includes means for transmitting the data until an end of the current data interval.

9. The apparatus of claim 8, wherein the means for transmitting the data begins at a next transmit time interval (TTI).

10. The apparatus of claim 7, wherein the base station is operated by a network operator having a higher priority to the contention-based shared channel than one or more base stations operated by another network operator.

11. The apparatus of claim 10, further including:

means for performing, by the base station, a full CCA at a beginning of a next data interval; and

means for continuing transmission of the data in response to success of the full CCA.

12. The apparatus of claim 7,

wherein the base station is operated by a network operator having a lower priority to the contention-based shared channel than one or more base stations operated by another network operator, and

wherein transmission of the data begins at a next slot boundary of the transmission opportunity.

13. A non-transitory computer-readable medium having program code recorded thereon in a wireless network having at least one contention-based shared channel in which communications are configured having one or more control intervals time division multiplexed with one or more data intervals for transmission opportunities, the program code comprising:

program code executable by a computer for causing the computer to receive, at a base station, data for communication, wherein the data is received at a time during a current data interval on a contention-based shared channel;

program code executable by the computer for causing the computer to review received signals on the contention-based shared channel during a previous control interval located immediately prior to the current data interval;

program code, executable by the computer in response to none of the received signals indicating a contention-resolution of the contention-based shared channel, for causing the computer to perform an abbreviated clear channel assessment (CCA); and

program code executable by the computer for causing the computer to transmit the data in response to a successful completion of the abbreviated CCA.

14. The non-transitory computer-readable medium of claim 13, wherein the program code executable by the computer for causing the computer to transmit the data includes program code executable by the computer for causing the computer to transmit the data until an end of the current data interval.

15. The non-transitory computer-readable medium of claim 14, wherein the program code executable by the computer for causing the computer to transmit the data begins at a next transmit time interval (TTI).

16. The non-transitory computer-readable medium of claim 13, wherein the base station is operated by a network operator having a higher priority to the contention-based shared channel than one or more base stations operated by another network operator.

17. The non-transitory computer-readable medium of claim 16, further including:

program code executable by the computer for causing the computer to perform, by the base station, a full CCA at a beginning of a next data interval; and

program code executable by the computer for causing the computer to continue transmission of the data in response to success of the full CCA.

18. The non-transitory computer-readable medium of claim 13,

wherein the base station is operated by a network operator having a lower priority to the contention-based shared channel than one or more base stations operated by another network operator, and

wherein transmission of the data begins at a next slot boundary of the transmission opportunity.

19. An apparatus configured for wireless communication in a wireless network having at least one contention-based shared channel in which communications are configured having one or more control intervals time division multiplexed with one or more data intervals for transmission opportunities, the apparatus comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured;

to receive, at a base station, data for communication, wherein the data is received at a time during a current data interval on a contention-based shared channel;

to review received signals on the contention-based shared channel during a previous control interval located immediately prior to the current data interval;

to perform, in response to none of the received signals indicating a contention-resolution of the contention-based shared channel, an abbreviated clear channel assessment (CCA); and

to transmit the data in response to a successful completion of the abbreviated CCA.

20. The non-transitory computer-readable medium of claim 19, wherein the configuration of the at least one processor to transmit the data includes configuration to transmit the data until an end of the current data interval.

21. The non-transitory computer-readable medium of claim 20, wherein the configuration of the at least one processor to transmit the data begins at a next transmit time interval (TTI).

22. The non-transitory computer-readable medium of claim 19, wherein the base station is operated by a network operator having a higher priority to the contention-based shared channel than one or more base stations operated by another network operator.

23. The apparatus of claim 22, further including configuration of the at least one processor:

to perform, by the base station, a full CCA at a beginning of a next data interval; and

to continue transmission of the data in response to success of the full CCA.

24. The non-transitory computer-readable medium of claim 19,

wherein the base station is operated by a network operator having a lower priority to the contention-based shared channel than one or more base stations operated by another network operator, and

wherein transmission of the data begins at a next slot boundary of the transmission opportunity.