Techniques for transmitting patterns of signal transmissions or reference signals over an unlicensed radio frequency spectrum band

• US 10,285,069 B2
• Filed: 12/11/2017
• Issued: 05/07/2019
• Est. Priority Date: 04/10/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Zhang, Xiaoxia, Luo, Tao, Wang, Jun
• Primary Examiner(s): Khirodhar, Maharishi V
• Application Number:
  US15/837,216
• Publication Number:
  US 20180109958A1
• Time in Patent Office: 512 Days
• CPC Class Codes: H04L 27/0006 Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio for spectrum sharing between different networks H04W16/14
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0023 Time-frequency-space
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0094 Indication of how sub-channels of the path are allocated
• 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 68/005 Transmission of information for alerting of incoming communication
• CPC Class Codes: H04W 72/1263 Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
• CPC Class Codes: H04W 72/30 Resource management for broadcast services
• CPC Class Codes: H04W 74/04 Scheduled access hybrid access H04W74/02
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

Techniques are described for wireless communication. A first method may include determining a pattern of signal transmissions for transmitting instances of a signal in a time period of an unlicensed radio frequency spectrum band; determining whether the unlicensed radio frequency spectrum band is unavailable to transmit at least one instance of the signal; and changing, in response to determining the unlicensed radio frequency spectrum band is unavailable to transmit an instance of the signal, the pattern of signal transmissions for the time period. A second method may include identifying at least one reference signal pattern from a plurality of reference signal patterns based at least in part on whether a plurality of transmission time intervals are bundled; and signaling the identified at least one reference signal pattern to a device.

Claims

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

monitoring a window of a plurality of frames during a time period of an unlicensed radio frequency spectrum band for transmission of a paging instance to the wireless communication device;

determining the paging instance failed to transmit during a first frame of the window of the unlicensed radio frequency spectrum band due to unavailability of the unlicensed radio frequency spectrum band; and

monitoring a second frame of the window in the time period of the unlicensed radio frequency spectrum band for transmission of the paging instance based at least in part on the determining the paging instance failed to transmit.

2. The method of claim 1, further comprising:

monitoring the window of the plurality of frames for transmission of paging instances of other devices; and

acquiring paging information for the wireless communication device based at least in part on a second paging instance that is not associated with the wireless communication device.

3. The method of claim 2, further comprising:

monitoring a sub-window within the window of the plurality of frames for transmission of the paging instance before monitoring the window of the plurality of frames for transmission of paging instances of other devices.

4. The method of claim 1, further comprising:

determining that the paging instance failed to transmit to the wireless communication device during a first set of scheduled paging instances of the window associated with the wireless communication device;

monitoring a second set of scheduled paging instances of the window associated with a second device based at least in part on determining that the paging instance failed to transmit to the wireless communication device during the first set of scheduled paging instances; and

acquiring paging information for the wireless communication device based at least in part on receiving a second paging instance associated with the second device during the second set of scheduled paging instances.

5. The method of claim 1, wherein the determining comprises:

determining the paging instance failed to transmit during the first frame based at least in part on a blind detection of a channel usage beacon signal (CUBS) for the first frame.

6. The method of claim 5, further comprising:

monitoring each frame in the time period, until determining at least one paging instance has been transmitted.

7. The method of claim 1, further comprising:

monitoring each frame in the window of the plurality of frames, until determining the paging instance has been transmitted.

8. The method of claim 1, further comprising:

monitoring each frame in the window of the plurality of frames, until determining the paging instance will not be transmitted.

9. The method of claim 1, further comprising:

detecting transmission of the paging instance in a clear channel assessment (CCA)-exempt transmission (CET) in the time period.

10. The method of claim 1, further comprising:

detecting transmission of the paging instance in a listen-before-talk (LBT) frame in the time period.

11. The method of claim 1, wherein transmission of the paging instance during the second frame is based at least in part on a change in a pattern of signal transmissions for the time period.

12. An apparatus for wireless communication by a wireless communication device, comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and executable by the processor to cause the apparatus to;

monitor a window of a plurality of frames during a time period of an unlicensed radio frequency spectrum band for transmission of a paging instance to the wireless communication device;

determine the paging instance failed to transmit during a first frame of the window of the unlicensed radio frequency spectrum band due to unavailability of the unlicensed radio frequency spectrum band; and

monitor a second frame of the window in the time period of the unlicensed radio frequency spectrum band for transmission of the paging instance based at least in part on the determining the paging instance failed to transmit.

13. The apparatus of claim 12, wherein the instructions are further executable by the processor to cause the apparatus to:

monitor the window of the plurality of frames for transmission of paging instances of other devices; and

acquire paging information for the wireless communication device based at least in part on a second paging instance that is not associated with the wireless communication device.

14. The apparatus of claim 13, wherein the instructions are further executable by the processor to cause the apparatus to:

monitor a sub-window within the window of the plurality of frames for transmission of the paging instance before monitoring the window of the plurality of frames for transmission of paging instances of other devices.

15. The apparatus of claim 12, wherein the instructions are further executable by the processor to cause the apparatus to:

determine that the paging instance failed to transmit to the wireless communication device during a first set of scheduled paging instances of the window associated with the wireless communication device;

monitor a second set of scheduled paging instances of the window associated with a second device based at least in part on determining that the paging instance failed to transmit to the wireless communication device during the first set of scheduled paging instances; and

acquire paging information for the wireless communication device based at least in part on receiving a second paging instance associated with the second device during the second set of scheduled paging instances.