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1. WO2017095277 - METHOD AND WIRELESS DEVICE

注意: このテキストは、OCR 処理によってテキスト化されたものです。法的な用途には PDF 版をご利用ください。

CLAIMS

What is claimed is:

1. A method (800), in a wireless device (50), wherein the wireless device (50) is configured with a plurality of channel-sensing resources, each channel-sensing resource being associated with at least one corresponding transmission resource, the method (800) comprising:

evaluating (810), in response to a determination that first data is ready to be

transmitted by the wireless device (50), whether one or more of the plurality of channel-sensing resources are occupied;

detecting (815) that at least one of the plurality of channel-sensing resources is not occupied;

transmitting (820) at least a part of the first data on at least one transmission resource associated with the at least one channel-sensing resource, based on said detecting;

receiving (830) a grant for a scheduled transmission at least partly overlapping with at least one of said plurality of channel-sensing resources, subsequently to said evaluating, detecting, and transmitting; and

transmitting (840) second data in accordance with the received grant.

2. The method (800) of claim 1, wherein evaluating (810) whether one or more of the plurality of channel-sensing resources are occupied comprises analyzing radio-frequency energy received in the one or more of the plurality of channel-sensing resources, and wherein said detecting (815) is based on said analyzing.

3. The method (800) of claim 2, wherein analyzing radio-frequency energy received in the one or more of the plurality of channel-sensing resources comprises comparing radio-frequency energy received in each channel-sensing resource to a predetermined threshold and detecting that at least one of plurality of channel-sensing resources is not occupied by determining that radio-frequency energy received in the at least one of the one or more of the frequency resources is less than the predetermined threshold.

4. The method (800) of claim 3, wherein analyzing radio-frequency energy received in the one or more of the plurality of channel-sensing resources comprises correlating a signal received in a first channel-sensing resource against a first predetermined reference signal, and wherein the method further comprises omitting received radio-frequency energy

corresponding to the first predetermined reference signal when comparing received radio-frequency energy for the first channel-sensing resource to the predetermined threshold.

5. The method (800) of claim 4, wherein analyzing radio-frequency energy received in the one or more of the plurality of channel-sensing resources comprises:

correlating a signal received in the first channel-sensing resource against each of one or more predetermined reference signals;

removing signal energy corresponding to one or more of the predetermined reference signals from the signal received in the first channel-sensing resource, based on the correlating, to obtain a residual signal; and

comparing the energy in the residual signal to the predetermined threshold;

wherein said detecting (815) is based on the comparing of the energy in the residual signal to the predetermined threshold.

6. The method (800) of any of claims 2-5, wherein analyzing radio-frequency energy received in the one or more of the plurality of channel-sensing resources comprises correlating a signal received in a channel-sensing resource against a second predetermined reference signal, wherein said detecting (815) comprises determining the absence of the second predetermined reference signal, based on said correlating.

7. The method (800) of any of claims 1-6, further comprising, prior to said evaluating (810), determining a duration of the channel-sensing resources based at least in part on received configuration information.

8. The method (800) of any of claims 1-7, further comprising determining a duration of the channel-sensing resources based at least in part on a result from a previous attempt to determine whether one or more other wireless devices were transmitting during an earlier transmission-time interval.

9. The method (800) of any of claim 1-8, further comprising determining a duration of the channel-sensing resources based at least in part on a type of data to be transmitted by the wireless device (50).

10. The method (800) of any of claims 1-9, further comprising determining a duration of the channel-sensing resources based at least in part on a timing advance parameter for the wireless device (50).

11. The method (800) of any of claims 1-10, wherein said evaluating (810) comprises analyzing radio-frequency energy received in a first one of the one or more channel-sensing resources during a first analysis period, having a first duration, and wherein the method further comprises:

analyzing radio-frequency energy received in a second one of the one or more

channel-sensing resources during a second analysis period overlapping the first analysis period and having a second duration; and

transmitting a part of the first data on a second transmission resource, corresponding to second one of the one or more channel-sensing resources, in response to determining, based on the analyzing of the radio-frequency energy received in the second one of the one or more channel-sensing resources, that the second one of the one or more channel-sensing resources is not occupied.

12. The method (800) of claim 11, wherein the first and second durations differ.

13. The method (800) of any of claims 1-12, wherein said transmitting (820) at least a part of the first data on at least one transmission resource associated with the at least one channel-sensing resource comprises transmitting (870) in a first transmission resource during a first part of the first transmission resource, and wherein the method further comprises:

ceasing (875) transmission in the first transmission resource a pre-determined interval after the first part of the first transmission resource begins;

analyzing (880) radio-frequency energy received in the first transmission resource during an interruption interval that begins after said ceasing; and selectively resuming transmission or refraining from transmitting (885) in the first transmission resource during a third part of the first transmission resource, based on the analyzing of radio-frequency received in the first transmission resource during the interruption interval.

14. The method (800) of claim 13, further comprising determining that radio-frequency energy for the first transmission resource during the interruption interval exceeds a

predetermined threshold and, in response to said determining, refraining from transmitting in the first transmission resource during the third part of the transmission resource.

15. The method (800) of claim 13, wherein said analyzing of the radio-frequency received in the first transmission resource during the interruption interval indicates the presence of clear-to-send signal from another wireless device, and wherein the method comprises resuming transmission in the first transmission resource during the third part of the transmission resource, based on said indication.

16. A method (900), in a wireless device (50), comprising:

transmitting (902) a reference signal in one or more transmission resources for an initial period of a pre-scheduled transmission-time interval; and transmitting (904) data in the one or more transmission resources for a second period of the pre-scheduled transmission-time interval, following the initial period.

17. The method (900) of claim 16, further comprising transmitting the reference signal using a first antenna configuration and transmitting the data using a second antenna configuration, the second antenna configuration differing from the first antenna configuration.

18. The method (900) of claim 17, wherein the first antenna configuration is a broadcast configuration and the second antenna configuration is a beam-formed transmission.

19. The method (900) of claim 17, wherein the second antenna configuration is a precoded multiple-input multiple-output, MIMO, configuration and the first antenna configuration is a non-precoded configuration.

20. The method (900) of any of claims 16-19, further comprising selecting the reference signal from one of a set of predetermined reference signals.

21. A method (1000), in a wireless device (50), comprising:

receiving (1002), in a first part of a pre-scheduled transmission-time interval, a first signal from a second wireless device;

transmitting (1004), in a second part of the pre-scheduled transmission-time interval, a clear-to-send indicator, in response to said receiving; and

receiving (1006) a second signal from the second wireless device in a third part of the pre-scheduled transmission-time interval, the third part of the pre-scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.

22. A method (1100), in a wireless device (50), comprising:

detecting (1102) a collision in a first part of a pre-scheduled transmission -time

interval; and

transmitting (1104) a not-cl ear-to- send indicator in a second part of the pre-scheduled transmission-time indicator, in response to said detecting, so as to prevent transmissions from one or more other wireless devices in a third part of the pre-scheduled transmission-time interval, the third part of the pre-scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.

23. A wireless device (50), comprising:

transceiver circuitry (56) configured to send and receive transmissions; and processing circuitry (60) configured to control the transceiver circuitry (56) and

configured with a plurality of channel-sensing resources, each channel-sensing resource being associated with one or more corresponding transmission resources, wherein the processing circuitry (60) is configured to:

evaluate, in response to a determination that first data is ready to be transmitted by the wireless device (50), whether one or more of the plurality of channel-sensing resources are occupied;

detect that at least one of the plurality of channel-sensing resources is not occupied;

transmit at least a part of the first data on at least one transmission resource associated with the at least one channel-sensing resource, in response to said detecting;

receive a grant for a scheduled transmission at least partly overlapping with at least one of the plurality of channel-sensing resources, subsequently to said evaluating, detecting, and transmitting ; and

transmit second data in accordance with the received grant.

24. The wireless device (50) of claim 23, wherein the processing circuitry (60) is configured to evaluate whether one or more of the plurality of channel-sensing resources are occupied by analyzing radio-frequency energy received in the one or more of the plurality of channel-sensing resources.

25. The wireless device (50) of claim 24, wherein the processing circuitry (60) is configured to compare radio-frequency energy received in each of the one or more of the plurality of channel-sensing resources to a predetermined threshold and determine that at least one of the one or more channel-sensing resources is not occupied by determining that received radio-frequency energy in the at least one of the channel-sensing resources is less than the predetermined threshold.

26. The wireless device (50) of claim 25, wherein the processing circuitry (60) is configured to:

correlate a signal received in a first channel-sensing resource against a first

predetermined reference signal; and

omit received radio-frequency energy corresponding to the first predetermined

reference signal when comparing radio-frequency energy received in the first channel-sensing resource to the predetermined threshold.

27. The wireless device (50) of claim 26, wherein the processing circuitry (60) is configured to:

correlate a signal received in the first channel-sensing resource against each of one or more predetermined reference signals;

remove signal energy corresponding to one or more of the predetermined reference signals from the received signal, based on the correlating, to obtain a residual signal;

compare the energy in the residual signal to the predetermined threshold; and transmit in the first channel-sensing resource based on the comparing of the energy in the residual signal to the predetermined threshold.

28. The wireless device (50) of any of claims 23-27, wherein the processing circuitry (60) is configured to:

correlate a signal received in a second channel-sensing resource against a second predetermined reference signal; and

transmit in the second channel-sensing resource in response to determining the

absence of the second predetermined reference signal, based on said correlation.

29. The wireless device (50) of any of claims 23-28, wherein the processing circuitry (60) is configured to, prior to said analyzing, determine a duration of the channel-sensing resources based at least in part on received configuration information.

30. The wireless device (50) of any of claims 23-29, wherein the processing circuitry (60) is configured to determine a duration of the channel-sensing resources based at least in part on a result from a previous attempt to determine whether one or more other wireless devices were transmitting during an earlier transmission-time interval.

31. The wireless device (50) of any of claims 23-30, wherein the processing circuitry (60) is configured to determine a duration of the channel-sensing resources based at least in part on a type of data to be transmitted by the wireless device (50).

32. The wireless device (50) of any of claims 23-31, wherein the processing circuitry (60) is configured to determine a duration of the channel sensing resources based at least in part on a timing advance parameter for the wireless device (50).

33. The wireless device (50) of any of claims 23-32, wherein the processing circuitry (60) is configured to perform said evaluating by analyzing radio-frequency energy received in the first one of the one or more channel-sensing resources during a first analysis period, having a first duration, and wherein the processing circuitry (60) is further configured to:

analyze radio-frequency energy received in a second one of the one or more channel- sensing resources during a second analysis period overlapping the first analysis period and having a second duration; and

transmit a part of the first data on a second transmission resource, corresponding to the second one of the one or more channel-sensing resources, in response to

determining, based on the analyzing of the radio-frequency energy received in the second one of the one or more channel-sensing resources, that the second one of the one or more channel-sensing resources is not occupied.

34. The wireless device (50) of claim 33, wherein the first and second durations differ.

35. A wireless device (50), comprising:

transceiver circuitry (56) configured to send and receive transmissions; and processing circuitry (60) configured via the transceiver circuitry (56) to:

transmit a reference signal in one or more frequency resources for an initial period of a pre-scheduled transmission-time interval; and

transmit data in a second period of the pre-scheduled transmission-time

interval, following the initial period.

36. The wireless device (50) of claim 35, wherein the processing circuitry (56) is configured to transmit the reference signal using a first antenna configuration and transmit the data using a second antenna configuration, the second antenna configuration differing from the first antenna configuration.

37. The wireless device (50) of claim 36, wherein the first antenna configuration is a broadcast configuration and the second antenna configuration is a beam-formed transmission.

38. The wireless device (50) of claim 37, wherein the second antenna configuration is a precoded multiple-input multiple-output, MIMO, configuration and the first antenna configuration is a non-precoded configuration.

39. The wireless device (50) of any of claims 35-38, wherein the processing circuitry (60) is configured to select the reference signal from one of a set of predetermined reference signals.

40. A wireless device (50, 30), comprising:

transceiver circuitry (56, 36) configured to send and receive transmissions; and processing circuitry (60, 40) configured via the transceiver circuitry (56, 36) to:

receive, in a first part of a pre-scheduled transmission-time interval, a first signal from a second wireless device;

transmit, in a second part of the pre-scheduled transmission-time interval, a clear-to-send indicator, in response to said receiving; and

receive a second signal from the second wireless device in a third part of the pre-scheduled transmission-time interval, the third part of the pre- scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.

41. A wireless device (50, 30), comprising:

transceiver circuitry (56, 36) configured to send and receive transmissions; and processing circuitry (60, 40) configured via the transceiver circuitry (56, 36) to:

detect a collision in a first part of a pre-scheduled transmission-time interval; and

transmit a not-clear-to-send indicator in a second part of the pre-scheduled transmission-time indicator, in response to said detecting, so as to prevent transmissions from one or more other wireless devices in a third part of the pre-scheduled transmission-time interval, the third part of the pre-scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.

42. A computer program product comprising program instructions (66) for a processor (60) in a wireless device (50) configured with a plurality of channel-sensing resources, each channel-sensing resource being associated with one or more corresponding transmission resources, wherein said program instructions are configured so as to cause the wireless device (50), when the program instructions are executed by the processor (60), to:

evaluate, in response to a determination that first data is ready to be transmitted by the wireless device (50), whether one or more of the plurality of channel-sensing resources are occupied;

detect that at least one of the plurality of channel-sensing resources is not occupied; transmit at least a part of the first data on at least one transmission resource associated with the at least one channel-sensing resource, in response to said detecting; receive a grant for a scheduled transmission at least partly overlapping with at least one of the plurality of channel-sensing resources, subsequently to said evaluating, detecting, and transmitting ; and

transmit second data in accordance with the received grant.

43. A computer program product comprising program instructions (66) for a processor (60) in a wireless device (50), wherein said program instructions are configured so as to cause the wireless device (50), when the program instructions are executed by the processor (60), to: transmit a reference signal in one or more frequency resources for an initial period of a pre-scheduled transmission-time interval; and

transmit data in a second period of the pre-scheduled transmission-time interval, following the initial period.

44. A computer program product comprising program instructions (66, 46) for a processor (60, 40) in a wireless device (50, 30), wherein said program instructions are configured so as to cause the wireless device (50, 30), when the program instructions are executed by the processor (60, 40), to:

receive, in a first part of a pre-scheduled transmission-time interval, a first signal from a second wireless device;

transmit, in a second part of the pre-scheduled transmission-time interval, a clear-to- send indicator, in response to said receiving; and

receive a second signal from the second wireless device in a third part of the pre- scheduled transmission-time interval, the third part of the pre-scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.

45. A computer program product comprising program instructions (66, 46) for a processor (60, 40) in a wireless device (50, 30), wherein said program instructions are configured so as to cause the wireless device (50, 30), when the program instructions are executed by the processor (60, 40), to:

detect a collision in a first part of a pre-scheduled transmission-time interval; and transmit a not-clear-to-send indicator in a second part of the pre-scheduled

transmission-time indicator, in response to said detecting, so as to prevent transmissions from one or more other wireless devices in a third part of the pre-scheduled transmission-time interval, the third part of the pre-scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.

46. A non-transitory computer-readable medium (64, 44) comprising, stored thereupon, the computer program product of any of embodiments 45-48.

47. A wireless device (50) configured with a plurality of channel-sensing resources, each channel-sensing resource being associated with one or more corresponding transmission resources, the wireless device (50) comprising:

an evaluating module (1302) for evaluating, in response to a determination that first data is ready to be transmitted by the wireless device (50), whether one or more of the plurality of channel-sensing resources are occupied and for detecting that at least one of the plurality of channel-sensing resources is not occupied;

a listen-before-talk transmission module (1304) for transmitting at least a part of the first data on at least one transmission resource associated with the at least one channel-sensing resource, in response to said detecting;

a receiving module (1306) for receiving a grant for a scheduled transmission at least partly overlapping with at least one of the plurality of channel-sensing resources, subsequently to said evaluating, determining, and transmitting; and a scheduled transmission module (1308) for transmitting second data in accordance with the received grant.

48. A wireless device (50), comprising:

a transmitting module (1402) for transmitting a reference signal in one or more

frequency resources for an initial period of a pre-scheduled transmission-time interval; and

the transmitting module (1402) for transmitting data in a second period of the pre- scheduled transmission-time interval, following the initial period.

49. A wireless device (50, 30), comprising:

a receiving module (1502, 1702) for receiving, in a first part of a pre-scheduled transmission-time interval, a first signal from a second wireless device; a transmitting module (1504, 1704) for transmitting, in a second part of the pre- scheduled transmission-time interval, a clear-to-send indicator, in response to said receiving; and

the receiving module (! 506, 1706) for receiving a second signal from the second wireless device in a third part of the pre-scheduled transmission-time interval, the third part of the pre-scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.

50. A wireless device (50, 30), comprising:

a detecting module (1602, 1802) for detecting a collision in a first part of a pre- scheduled transmission-time interval; and

a transmitting module (1604, 1804) for transmitting a not-clear-to-send indicator in a second part of the pre-scheduled transmission-time indicator, in response to said detecting, so as to prevent transmissions from one or more other wireless devices in a third part of the pre-scheduled transmission-time interval, the third part of the pre-scheduled transmission-time interval following the second part of the pre-scheduled transmission-time interval.