METHOD AND DEVICES FOR SIGNALING TRANSMISSION IN UNLICENSED BAND

• US 20170265082A1
• Filed: 09/29/2014
• Published: 09/14/2017
• Est. Priority Date: 09/29/2014
• Status: Active Grant

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: JIANG, Lei, LIU, Hongmei, WANG, Gang, JIANG, Chuangxin, SUN, Zhennian
• Granted Patent: US 10,945,134 B2
• Time in Patent Office: Days
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]

Abstract

Embodiments of the present invention provide method and devices for signaling transmission in unlicensed band. The method comprising determining a signal transmission pattern, which defines time and frequency resources for transmitting at least one signal in a first frequency band; signaling, via a second frequency band, the signal transmission pattern to a first device; and transmitting the at least one signal via the first frequency band, to the first device, according to the signal transmission pattern; wherein a transmission of one of the at least one signal is skipped if time and frequency resource for the transmission defined by the signal transmission pattern is detected as busy. Corresponding methods and devices for receiving a signal which is transmitted using above method are also disclosed.

Claims

1-36. -36. (canceled)

37. A method for signal transmission in a wireless communication network, comprising:

determining a signal transmission pattern, which defines time and frequency resources for transmitting at least one signal in a first frequency band;

signaling, via a second frequency band, the signal transmission pattern to a first device; and

transmitting the at least one signal via the first frequency band to the first device, according to the signal transmission pattern, and skipping a transmission of one of the at least one signal if time and frequency resource for the transmission defined by the signal transmission pattern is detected as busy.

38. A method of claim 37, further comprising:

performing channel detection in the first frequency band before transmitting each of the at least one signal, and

determining whether to skip a transmission of one of the at least one signal based on the channel detection results.

39. A method of claim 37, wherein the at least one signal includes at least one of a reference signal, a synchronization signal, and a control signaling.

40. A method of claim 37, wherein the time and frequency resource for the transmission of the one of the at least one signal is detected as busy when received signal power on the same frequency resource is above a threshold, the threshold is configurable, determined based on a receiver sensitivity, or fixed.

41. A method of claim 37, wherein the first frequency band is an unlicensed frequency band and the second frequency band is a licensed frequency band.

42. A method of claim 37, wherein the first frequency band and/or the second frequency band comprise(s) multiple carriers, and at least one carrier in the first frequency band and at least one carrier in the second frequency band are configured for the first device as carrier aggregation or dual connectivity.

43. A method of claim 37, wherein determining a signal transmission pattern and signaling the signal transmission pattern to the first device are performed by a second device, while transmitting the at least one signal via the first frequency band to the first device is performed by a third device different from the second device.

44. A method for signal reception in a wireless communication network, comprising:

receiving, via a second frequency band, a configuration signaling indicating a signal transmission pattern to be used in a first frequency band, wherein the signal transmission pattern defines time and frequency resources for transmitting at least one signal; and

receiving the at least one signal via the first frequency band, according to the signal transmission pattern.

45. A method of claim 44, wherein the at least one signal includes at least one of a reference signal, a synchronization signal, and a control signaling.

46. A method of claim 44, wherein the first frequency band is an unlicensed frequency band and the second frequency band is a licensed frequency band.

47. A method of claim 44, wherein the first frequency band and/or the second frequency band comprise(s) multiple carriers, and at least one carrier in the first frequency band and at least one carrier in the second frequency band are configured for a device as carrier aggregation or dual connectivity.

48. A method of claim 44, wherein the configuration signaling is received from a first apparatus, while the at least one signal is received from a second apparatus different from the first apparatus.

49. A device for signal transmission in a wireless communication network, comprising:

a determination unit, configured for determining a signal transmission pattern, which defines time and frequency resources for transmitting at least one signal in a first frequency band;

a first transmission unit, configured for signaling, via a second frequency band, the signal transmission pattern to a first device; and

a second transmission unit, configured for transmitting the at least one signal via the first frequency band, to the first device, according to the signal transmission pattern, and skipping a transmission of one of the at least one signal if time frequency resource for the transmission defined by the signal transmission pattern is detected as busy.

50. A device of claim 49, wherein the device further comprising:

a channel detection unit, configured for performing channel detection in the first frequency band before transmitting each of the at least one signal, and

the second transmission unit is further configured for determining whether to skip a transmission of one of the at least one signal based on the channel detection results.

51. A device of claim 49, wherein the at least one signal includes at least one of a reference signal, a synchronization signal, and a control signaling.

52. A device of claim 49, wherein the time and frequency resource for the transmission of the one of the at least one signal is detected as busy when received signal power on the same frequency resource is above a threshold, the threshold is configurable, determined based on a receiver sensitivity, or fixed.

53. A device of claim 49, wherein the first frequency band is an unlicensed frequency band and the second frequency band is a licensed frequency band.

54. A device of claim 49, wherein the first frequency band and/or the second frequency band comprise(s) multiple carriers, and at least one carrier in the first frequency band and at least one carrier in the second frequency band are configured for the first device as carrier aggregation or dual connectivity.

55. A device of claim 49, wherein the device is implemented in a distributed way in multiple apparatus, with the determination unit and the first transmission unit implemented in a first apparatus and the second transmission unit implemented in a second apparatus separated from the first apparatus.

56. A device for signal reception in a wireless communication network, comprising:

a first receiving unit, configured for receiving via a second frequency band a configuration signaling indicating a signal transmission pattern to be used in a first frequency band, wherein the signal transmission pattern defines time and frequency resources for transmitting at least one signal; and

a second receiving unit, configured for receiving the at least one signal via the first frequency band, according to the signal transmission pattern.

57. A device of claim 56, wherein the at least one signal includes at least one of a reference signal, a synchronization signal, and a control signaling.

58. A device of claim 56, wherein the first frequency band is an unlicensed frequency band and the second frequency band is a licensed frequency band.

59. A device of claim 56, wherein the first frequency band and/or the second frequency band comprise(s) multiple carriers, and at least one carrier in the first frequency band and at least one carrier in the second frequency band are configured for the device as carrier aggregation or dual connectivity.