Opportunistic asynchronous operation for coordinated NR-SS

• US 10,687,358 B2
• Filed: 11/09/2017
• Issued: 06/16/2020
• 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
• Primary Examiner(s): Hsu, Alpus
• Application Number:
  US15/808,222
• Publication Number:
  US 20180139782A1
• Time in Patent Office: 950 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 with tranmission opportunities having one or more control intervals configured to accomodate contention-based reservation, the one or more control intervals being time division multiplexed with one or more data intervals for data transmission, 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 received on the contention-based shared channel during a previous period between the time and a beginning of a previous control interval located immediately prior to the current data interval to deterine whether reservation signals are detected, wherein the resercation signals indicate the contention-based reservation during the previous period;

in response to none of the reservation signals being detected on the contention-based shared channel, performing an abbreviated clear channel assessment (CCA) within the current data interval; and

transmitting the data in a shortened date interval 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 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.

6. The method of claim 1, further including:

initiating a reservation procedure by tranmitting a reservation signal on the contention-based shared channel in response to the successul completion of the avreviated CCA, wherein the transmitting the data is in response to success of the reservation procedure.

7. An apparatus configured for wireless communication in a wireless network having at least one contention-based shared channel in which communications are configured with tranmission opportunitites having one or more control intervals configured to accommodate contention-based reservation, the one or more control intervals being time division multiplexed with one or more data intervals for transmission, 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 received on the contention-based shared channel during a previous period between the time and a beginning of a previous control interval located immediately prior to the current data interval to determine whether reservation signals are detected, wherein the reservation signals indicate the contention-based reservation during the previous period;

means, executable in response to none of the reservation signals being detected on the contention-based shared channel, for performing an abbreviated clear channel assessment (CCA) within the current date interval; and

means for transmitting the data in a shortened data interval 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 includes means for tranmitting the data beginning 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 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 means for tranmitting the data including means for transmitting the data beginning at a next slot boundary of the transmission opportunity.

12. The apparatus of claim 7, further including:

means for initiating a reservation procedure by tranmitting a reservation signal on the contention-based shared channel in response to the successful completion of the avvreviated CCA, wherein the transmitting the data is in response to success of the reservation procedure.

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 with transmission opportunities having one or more control intervals configured to accommodate contention-based reservation, the one or more control intervals being time division multiplexed with one or more data intervals for data transmission, 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 receied on the contention-based shared channel during a previous period between the time and a beginning of a previous control interval located immediately prior to the current data interval to determine whether reservation signals are detected, wherein the reseration signals indicate the contention-based reservation during the previous period;

program code, executable by the computer in response to none of the reservation signals being detected on the contention-based shared channel, for causing the computer to perform an abbreviated clear channel assessment (CCA) within the current date interval; and

program code executable by the computer for causing the computer to transmit the data in a shortened data interval 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 inclufes program code executable by the computer for causing the computer to tranmsit the data beginning 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 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 the program code executable by the computer for causing the computer to tranmit the date includes program code executable by the computer for cauing the computer to transmit the data beginning at a next slot boundary of the transmission opportunity.

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

program code executable by the computer for causing the computer to initiate a reservation procedure by transmitting a reservation signal on the contention-based shared channel in response to the successful completion of the avvreviated CCA, wherein the transmitting the data is in response to success of the reservation procedure.

19. An apparatus configured for wireless communication in a wireless network having at least one contention-based shared channel in which communications are configured with tranmission opportunitied having one or more control intervals configured to accommodte contention-based reservation, the one or more control intervals being time divdion multiplexed with one or more dat interals for data transmission, 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 period between the time and a beginning of a previous control interval located immediately prior to the current data interval to determine whether reservation signals are detected, wherein the reservation signals indicate the contention-based reservation during the previous period;

to perform, in response to none of the reservation signals being detected on the contention-based shared channel, an abbreviated clear channel assessment (CCA) within the current data interval; and

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

20. The apparatus 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 apparatus of claim 20, wherein the configuration of the at least one processor to transmit the data includes configuration to transmit the data beginning at a next transmit time interval (TTI).

22. The apparatus 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 appratus 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 the configuration of the at least one processor to transmit the data includes configuration to transmit the data beginning at a next slot boundary of the transmission opportunity.

24. The apparatus of claim 19, wherein the at least one processor is further configured to initiate a reservation procedure by transmitting a reservation signal on the contention-based shared channel in response to the successful completionof the abbreviated CCA, wherein the transmitting the data is in response to success of the reservation procedure.