Systems and Methods of Performing a Listen-Before-Talk (LBT) Radio Protocol

Patent metadata

Field	Value
Publication number	US-2016381707-A1
Application number	US-201514902918-A
Country	US
Kind code	A1
Filing date	Nov 20, 2015
Priority date	Jan 30, 2015
Publication date	Dec 29, 2016
Grant date	—

Abstract

Systems and methods of performing a listen-before-talk (LBT) radio protocol in a communication system are provided. In one exemplary embodiment, a method ( 600 ) by a radio component ( 403, 503 ) of a wireless device ( 400, 500 ) may include receiving ( 601 ), by the radio component, from a baseband component ( 401, 501 ) of the wireless device, transmit data during a transmit-time interval associated with a synchronous wireless communication system. Further, the method may include, detecting ( 603 ), by the radio component, that a medium associated with an asynchronous communication system is available. Also, in response to detecting, the method may include, transmitting ( 605 ), by the radio component, the transmit data on the medium during the transmit-time interval.

First claim

1 - 23 . (canceled)

24 . A method by a radio component of a wireless device for performing a listen-before-talk radio protocol in a communication system, the method comprising:
receiving, by the radio component and from a baseband component of the wireless device, transmit data during a transmit-time interval associated with a synchronous wireless communication system; detecting, by the radio component, that a medium associated with an asynchronous communication system is available; and in response to the detecting, the radio component transmitting the transmit data on the medium during the transmit-time interval.

25 . The method of claim 24 , wherein receiving the transmit data includes:
receiving, by the radio component and from the baseband component, a first indication associated with enabling a channel-sensing mechanism of the radio component; in response to the first indication, enabling the channel-sensing mechanism; wherein the detecting that the medium is available includes:
receiving, from the channel-sensing mechanism, a second indication that the medium associated with the asynchronous communication system is available; and
in response to the second indication, sending, to a transmitter of the radio component, a third indication to transmit the transmit data on the medium during the transmit-time interval.

26 . The method of claim 25 , wherein a time from receiving the first indication to sending the third indication is less than the transit time interval.

27 . The method of claim 25 , wherein a time from receiving the second indication to sending the third indication is no more than about fifteen microseconds (15 μs).

28 . The method of claim 25 , wherein a time from receiving the second indication to sending the third indication is in a range from about one microsecond (1 μs) to about fifteen microseconds (15 μs).

29 . The method of claim 25 , wherein the detecting that the medium is available further includes:
in response to the second indication, sending, to a power amplifier of the radio component, a fourth indication to enable the power amplifier.

30 . The method of claim 24 , further comprising:
receiving, from the baseband component, a fifth indication associated with enabling a channel-sensing mechanism of the radio component; in response to the fifth indication, enabling the channel-sensing mechanism; receiving, from the baseband component, a sixth indication that the medium associated with the asynchronous communication system is available; and in response to the sixth indication, determining to refrain from transmitting the transmit data.

31 . The method of claim 24 , wherein the transmitting the transmit data on the medium during the transmit-time interval includes transmitting, by a transmitter of the radio component, the transmit data on the medium during the transmit-time interval.

32 . The method of claim 24 , wherein the transmitting the transmit data on the medium during the transmit-time interval includes enabling a power amplifier of the radio component.

33 . The method of claim 24 , wherein the synchronous wireless communication system is associated with the long-term evolution (LTE) standard.

34 . The method of claim 24 , wherein the asynchronous wireless communication system is associated with the 802.11 standard.

35 . The method of claim 24 , wherein the transmit-time interval is one millisecond (1 ms).

36 . The method of claim 24 , wherein the wireless device supports licensed-assisted access, long-term evolution (LAA-LTE) operation.

37 . The method of claim 24 , wherein the medium is associated with unlicensed frequency bands.

38 . The method of claim 24 , wherein the medium is associated with at least one of a 2.4 gigahertz (2.4 GHz) band and a 5.1 gigahertz (5.1 GHz) band.

39 . A wireless device for performing a listen-before-talk radio protocol in a communication system, the wireless device comprising:
a baseband component; a radio component operationally coupled to the baseband component, wherein the radio component is configured to:
receive, from the baseband component, transmit data during a transmit-time interval associated with a synchronous wireless communication system;
detect that a medium associated with an asynchronous communication system is available; and
in response to detecting, transmit the transmit data on the medium during the transmit-time interval.

40 . The wireless device of claim 39 , wherein:
the radio component further includes a power amplifier; the radio component is further configured to in response to detecting, enable the power amplifier.

41 . The wireless device of claim 39 , wherein the radio component further includes:
a channel-sensing mechanism; a transmitter operationally coupled to the baseband component; and a control circuit operationally coupled to the baseband component, the channel-sensing mechanism and the transmitter, wherein the control circuit is configured to:
receive, from the baseband component, a first indication associated with enabling the channel-sensing mechanism;
in response to the first indication, enable the channel-sensing mechanism;
receive, from the channel-sensing mechanism, a second indication that the medium is available;
in response to the second indication, send, to the transmitter, a third indication to transmit data on the medium.

42 . The wireless device of claim 41 , wherein:
the radio component is further configured to include a power amplifier; the control circuit is further configured to, in response to the second indication, send, to the power amplifier, a fourth indication to enable the power amplifier.

43 . The wireless device of claim 39 :
wherein the radio component further includes a channel-sensing mechanism; wherein the control circuit is further configured to:
receive, from the baseband component, a fifth indication associated with enabling the channel-sensing mechanism of the radio component;
in response to the fifth indication, enable the channel-sensing mechanism;
receive, from the baseband component, a sixth indication that the medium associated with the asynchronous communication system is available;
in response to the sixth indication, determine to refrain from transmitting the transmit data.

Assignees

• ERICSSON TELEFON AB L M (publ)

Inventors

• Figueiredo Daniel
• Andersson Håkan
• Biswas Ashim
• Fröberg Olsson Jonas
• Singh Damanjit

Classifications

• H04W74/0808 Primary

  using carrier sensing, e.g. carrier sense multiple access [CSMA] · CPC title

• H04W56/001 Primary

  Synchronization between nodes · CPC title

• H04W74/0816 Primary

  with collision avoidance · CPC title

• H04W16/14

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W72/0446

  Resources in time domain, e.g. slots or frames · CPC title