COLLISION AVOIDANCE SCHEME FOR WIRELESS COMMUNICATIONS OVER UNLICENSED SPECTRUM
First Claim
1. A method for wireless communications, comprising:
- performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum;
transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available; and
receiving, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal.
1 Assignment
0 Petitions
Accused Products
Abstract
Methods and apparatuses are described in which an unlicensed spectrum is used for Long Term Evolution (LTE) communications. A first method includes performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum, transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available, and receiving, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal. A second method includes transmitting an RTS signal in an unlicensed spectrum or a V-RTS signal in a licensed spectrum, addressed to a set of UEs, and transmitting a CTS-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal.
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Citations
75 Claims
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1. A method for wireless communications, comprising:
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performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum; transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available; and receiving, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for wireless communications, comprising:
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means for performing clear channel assessment (CCA) to determine availability of an unlicensed spectrum; means for transmitting a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available; and means for receiving, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28)
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23. An apparatus for wireless communications, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to; perform clear channel assessment (CCA) to determine availability of an unlicensed spectrum; transmit a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available; and receive, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal.
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29. A computer program product for communications by a wireless communications apparatus in a wireless communications system, the computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to cause the wireless communications apparatus to:
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perform clear channel assessment (CCA) to determine availability of an unlicensed spectrum; transmit a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available; and receive, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal.
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30. A method for wireless communications, comprising:
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receiving, at a user equipment (UE), a request-to-send (RTS) signal transmitted to a set of UEs over an unlicensed spectrum; and transmitting, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal in response to the RTS signal. - View Dependent Claims (31, 32, 33, 34, 35, 36, 37, 38)
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39. An apparatus for wireless communications, comprising:
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means for receiving, at a user equipment (UE), a request-to-send (RTS) signal transmitted to a set of UEs over an unlicensed spectrum; and means for transmitting, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal in response to the RTS signal. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47)
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48. An apparatus for wireless communications, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to; receive, at a user equipment (UE), a request-to-send (RTS) signal transmitted to a set of UEs over an unlicensed spectrum; and transmit, in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal in response to the RTS signal. - View Dependent Claims (49, 50, 51, 52)
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53. A computer program product for communications by a user equipment (UE) in a wireless communications system, the computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to cause the UE to:
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perform clear channel assessment (CCA) to determine availability of an unlicensed spectrum; transmit a request-to-send (RTS) signal to a set of user equipments (UEs) using the unlicensed spectrum when a determination is made that the unlicensed spectrum is available; and receive in the unlicensed spectrum, a common clear-to-send (CTS) signal and an individual CTS signal from one or more of the UEs in response to the RTS signal.
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54. A method for wireless communications, comprising:
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transmitting a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) signal in a licensed spectrum, addressed to a set of user equipments (UEs); and transmitting a clear-to-send (CTS)-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal. - View Dependent Claims (55, 56, 57, 58)
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59. An apparatus for wireless communications, comprising:
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means for transmitting a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) signal in a licensed spectrum, addressed to a set of user equipments (UEs); and means for transmitting a clear-to-send (CTS)-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal. - View Dependent Claims (60, 61, 62, 63)
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64. An apparatus for wireless communications, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to; transmit a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) signal in a licensed spectrum, addressed to a set of user equipments (UEs); and transmit a clear-to-send (CTS)-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal. - View Dependent Claims (65, 66, 67)
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68. A computer program product for communications by a wireless communications apparatus in a wireless communications system, the computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to cause the wireless communications apparatus to:
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transmit a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) signal in a licensed spectrum, addressed to a set of user equipments (UEs); and transmit a clear-to-send (CTS)-to-self signal in the unlicensed spectrum along with the transmission of the V-RTS signal.
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69. A method for wireless communications, comprising:
receiving, at a user equipment (UE), a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) in a licensed spectrum, the RTS signal or the V-RTS signal being addressed to a set of UEs. - View Dependent Claims (70, 71, 72)
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73. An apparatus for wireless communications, comprising:
means for receiving, at a user equipment (UE), a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) in a licensed spectrum, the RTS signal or the V-RTS signal being addressed to a set of UEs.
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74. An apparatus for wireless communications, comprising:
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a processor; memory in electronic communication with the processor; and instructions stored in the memory, the instructions being executable by the processor to; receive, at a user equipment (UE), a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) in a licensed spectrum, the RTS signal or the V-RTS signal being addressed to a set of UEs.
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75. A computer program product for communications by a UE in a wireless communications system, the computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to cause the UE to:
receive a request-to-send (RTS) signal in an unlicensed spectrum or a virtual RTS (V-RTS) in a licensed spectrum, the RTS signal or the V-RTS signal being addressed to a set of UEs.
Specification