CHANNEL SENSING FOR INDEPENDENT LINKS

• US 20180054382A1
• Filed: 07/25/2017
• Published: 02/22/2018
• Est. Priority Date: 08/22/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Luo, Tao, Montojo, Juan, Kadous, Tamer, Li, Junyi, Zhang, Xiaoxia, Sun, Jing, Yoo, Taesang, Mallik, Siddhartha
• Granted Patent: US 10,587,497 B2
• Time in Patent Office: Days
• CPC Class Codes: H03M 13/09 Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
• CPC Class Codes: H04B 17/24 with feedback of measurements to the transmitter
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 7/022 Site diversity; Macro-diversity using two or more spaced independent antennas H04B7/04
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0691 using subgroups of transmit antennas
• CPC Class Codes: H04B 7/216 Code division or spread-spectrum multiple access [CDMA, SSMA]
• CPC Class Codes: H04L 1/1854 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 12/1827 Network arrangements for conference optimisation or adaptation
• CPC Class Codes: H04L 12/185 with management of multicast group membership
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 41/0668 by dynamic selection of recovery network elements, e.g. replacement by the most appropriate element after failure
• CPC Class Codes: H04L 45/16 Multipoint routing
• CPC Class Codes: H04L 5/003 Arrangements for allocating sub-channels of the transmission path
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/04 Arrangements for maintaining operational condition
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 48/08 : Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 52/146 : Uplink power control
• CPC Class Codes: H04W 52/16 : Deriving transmission power values from another channel
• CPC Class Codes: H04W 52/241 : taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/243 : taking into account interferences
• CPC Class Codes: H04W 52/346 : distributing total power among users or channels
• CPC Class Codes: H04W 52/386 : centralized, e.g. when the radio network controller or equivalent takes part in the power control
• CPC Class Codes: H04W 52/42 : in systems with time, space, frequency or polarisation diversity
• CPC Class Codes: H04W 52/50 : at the moment of starting communication in a multiple access environment
• CPC Class Codes: H04W 52/54 : Signalisation aspects of the TPC commands, e.g. frame structure
• CPC Class Codes: H04W 52/56 : Detection of errors of TPC bits
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/12 : Wireless traffic scheduling
• CPC Class Codes: H04W 72/20 : Control channels or signalling for resource management
• CPC Class Codes: H04W 72/21 : in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 72/53 : based on regulatory allocation policies
• CPC Class Codes: H04W 72/54 : based on quality criteria
• CPC Class Codes: H04W 76/19 : Connection re-establishment
• CPC Class Codes: H04W 76/22 : Manipulation of transport tunnels
• CPC Class Codes: H04W 92/20 : between access points

Abstract

Various aspects of the disclosure relate to channel sensing for independent links. In some aspects, the independent links may involve a first device (e.g., a user equipment) communicating via different independent links with different devices (e.g., transmit receive points (TRPs) or sets of TRPs). For example, the first device may communicate with a second device (e.g., a first TRP) via a first link and communicate with a third device (e.g., a second TRP) via a second link. In some scenarios, first channel sensing information may be obtained for the first link and second channel sensing information may be obtained for the second link. In some aspects, a decision of whether to transmit via one or more of the links may be based on the channel sensing on one or more of the links. In some cases, the links may be grouped together as a channel sensing group.

Claims

1. A method of communication for an apparatus, comprising:

obtaining first sensing information for a first wireless communication link;

obtaining second sensing information for a second wireless communication link; and

determining whether to transmit on the first wireless communication link based on the first sensing information and the second sensing information.

2. The method of claim 1, wherein:

the first wireless communication link and the second wireless communication link are members of a channel sensing group.

3. The method of claim 2, wherein:

a common set of channel sensing parameters is used for sensing by all member of the channel sensing group.

4. The method of claim 1, further comprising:

communicating first transport blocks via the first wireless communication link if the determination is to transmit,

wherein the first transport blocks are processed independently of second transport blocks communicated via the second wireless communication link.

5. The method of claim 4, wherein error processing of the first transport blocks is independent of error processing of the second transport blocks.

6. The method of claim 4, wherein cyclic redundancy check (CRC) processing of the first transport blocks is independent of CRC processing of the second transport blocks.

7. The method of claim 4, wherein:

the communication of the first transport blocks is via a first beam; and

the communication of the second transport blocks is via a second beam.

8. The method of claim 1, wherein:

the apparatus is a user equipment;

the obtaining of the first sensing information comprises sensing using a first beam associated with the first wireless communication link; and

the obtaining of the second sensing information comprises sensing using a second beam associated with the second wireless communication link.

9. The method of claim 8, further comprising:

determining whether to transmit on the second wireless communication link based on the first sensing information and the second sensing information.

10. The method of claim 8, further comprising:

communicating on the first wireless communication link using a first radio frequency (RF) chain of the apparatus; and

communicating on the second wireless communication link using a second RF chain of the apparatus.

11. The method of claim 8, further comprising:

communicating on the first wireless communication link using a first antenna sub-array of the apparatus; and

communicating on the second wireless communication link using a second antenna sub-array of the apparatus.

12. The method of claim 8, wherein the sensing comprises a listen before talk operation.

13. The method of claim 1, wherein:

the apparatus is a transmit receive point;

the obtaining of the first sensing information comprises sensing using a first beam associated with the first wireless communication link; and

the obtaining of the second sensing information comprises receiving the second sensing information from another apparatus that is configured to sense using a second beam associated with the second wireless communication link.

14. The method of claim 13, further comprising:

outputting the first sensing information for transmission to the other apparatus.

15. An apparatus for communication, comprising:

a memory; and

a processor coupled to the memory, wherein the processor and the memory are configured to;

obtain first sensing information for a first wireless communication link;

obtain second sensing information for a second wireless communication link; and

determine whether to transmit on the first wireless communication link based on the first sensing information and the second sensing information.

16. The apparatus of claim 15, wherein:

the first wireless communication link and the second wireless communication link are members of a channel sensing group.

17. The apparatus of claim 16, wherein:

a common set of channel sensing parameters is used for sensing by all member of the channel sensing group.

18. The apparatus of claim 15, wherein the processor and the memory are further configured to:

determine whether to transmit on the second wireless communication link based on the first sensing information and the second sensing information.

19. The apparatus of claim 15, wherein:

the processor and the memory are further configured to communicate first transport blocks via the first wireless communication link if the determination is to transmit; and

the first transport blocks are processed independently of second transport blocks communicated via the second wireless communication link.

20. The apparatus of claim 15, wherein the processor and the memory are further configured to:

output the first sensing information for transmission to the other apparatus.

21. An apparatus for communication, comprising:

means for obtaining first sensing information for a first wireless communication link;

means for obtaining second sensing information for a second wireless communication link; and

means for determining whether to transmit on the first wireless communication link based on the first sensing information and the second sensing information.

22. The apparatus of claim 21, further comprising:

means for determining whether to transmit on the second wireless communication link based on the first sensing information and the second sensing information.

23. The apparatus of claim 21, further comprising:

means for outputting the first sensing information for transmission to another apparatus.

24. A non-transitory computer-readable medium storing computer-executable code, including code to:

obtain first sensing information for a first wireless communication link;

obtain second sensing information for a second wireless communication link; and

determine whether to transmit on the first wireless communication link based on the first sensing information and the second sensing information.

25. A method of communication for an apparatus, comprising:

obtaining first sensing information for a first wireless communication link;

determining whether to transmit on the first wireless communication link based on the first sensing information;

obtaining second sensing information for a second wireless communication link; and

determining whether to transmit on the second wireless communication link based on the second sensing information, wherein the determination of whether to transmit on the second wireless communication link is independent of the determination of whether to transmit on the first wireless communication link.

26. The method of claim 25, wherein:

the obtaining of the first sensing information comprises a first channel sensing operation; and

the obtaining of the second sensing information comprises a second channel sensing operation, wherein the second channel sensing operation is independent of the first channel sensing operation.

27. The method of claim 26, wherein:

the first channel sensing operation uses a first beam; and

the second channel sensing operation uses a second beam.

28. The method of claim 25, further comprising:

communicating first transport blocks via the first wireless communication link if the determination of whether to transmit on the first wireless communication link is to transmit;

communicating second transport blocks via the second wireless communication link if the determination of whether to transmit on the second wireless communication link is to transmit; and

processing the first transport blocks independently of the second transport blocks.

29. The method of claim 28, wherein the processing comprises error processing.

30. The method of claim 28, wherein the processing comprises cyclic redundancy check (CRC) processing.

31. The method of claim 28, wherein:

the communication via the first wireless communication link uses a first radio frequency (RF) chain of the apparatus; and

the communication via the second wireless communication link uses a second RF chain of the apparatus.

32. The method of claim 28, wherein:

the communication via the first wireless communication link uses a first antenna sub-array of the apparatus; and

the communication via the second wireless communication link uses a second antenna sub-array of the apparatus.

33. An apparatus for communication, comprising:

a memory; and

a processor coupled to the memory, wherein the processor and the memory are configured to;

obtain first sensing information for a first wireless communication link;

determine whether to transmit on the first wireless communication link based on the first sensing information;

obtain second sensing information for a second wireless communication link; and

determine whether to transmit on the second wireless communication link based on the second sensing information, wherein the determination of whether to transmit on the second wireless communication link is independent of the determination of whether to transmit on the first wireless communication link.

34. The apparatus of claim 33, wherein the processor and the memory are further configured to:

communicate first transport blocks via the first wireless communication link if the determination of whether to transmit on the first wireless communication link is to transmit;

communicate second transport blocks via the second wireless communication link if the determination of whether to transmit on the second wireless communication link is to transmit; and

process the first transport blocks independently of the second transport blocks.

35. An apparatus for communication, comprising:

means for obtaining first sensing information for a first wireless communication link;

means for determining whether to transmit on the first wireless communication link based on the first sensing information;

means for obtaining second sensing information for a second wireless communication link; and

means for determining whether to transmit on the second wireless communication link based on the second sensing information, wherein the determination of whether to transmit on the second wireless communication link is independent of the determination of whether to transmit on the first wireless communication link.

36. The apparatus of claim 35, further comprising:

means for communicating configured to communicate first transport blocks via the first wireless communication link if the determination of whether to transmit on the first wireless communication link is to transmit, and further configured to communicate second transport blocks via the second wireless communication link if the determination of whether to transmit on the second wireless communication link is to transmit; and

means for processing the first transport blocks independently of the second transport blocks.

37. A non-transitory computer-readable medium storing computer-executable code, including code to:

obtain first sensing information for a first wireless communication link;

determine whether to transmit on the first wireless communication link based on the first sensing information;

obtain second sensing information for a second wireless communication link; and

determine whether to transmit on the second wireless communication link based on the second sensing information, wherein the determination of whether to transmit on the second wireless communication link is independent of the determination of whether to transmit on the first wireless communication link.