Listen-before-talk mechanism
First Claim
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1. A method for wireless communication, comprising:
- determining, at a first wireless node, that a channel is busy due to a second wireless node based at least in part on a clear channel assessment (CCA) procedure performed on the channel, the first wireless node associated with a first operator;
decoding, at the first wireless node, a header of a message transmitted by the second wireless node, the header comprising an indication of the second wireless node being associated with the first operator;
exchanging radio frame configuration information with the second wireless node via a wireless wide area network (WWAN) communication channel, the radio frame configuration information comprising a timing synchronization field for time aligning a first message associated with the first wireless node and a second message transmitted from the second wireless node and a CCA configuration field for synchronizing the CCA procedure at the first wireless node with a CCA procedure at the second wireless node such that the CCA procedure at the first wireless node is in alignment with the CCA procedure at the second wireless node; and
transmitting the first message on the channel busy due to the second wireless node during a subframe based at least in part on the indication, the first message time aligned in the subframe with the second message.
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Abstract
Methods, systems, devices, and apparatuses are described for a listen-before-talk (LBT) mechanism. A wireless node, e.g., a base station, may determine that a channel is available based on completing a clear channel assessment (CCA) procedure. The wireless node may be associated with a first operator. The wireless node may transmit a first message on the channel in a subframe based on the CCA procedure. The first message may include a header portion that precedes a data portion. The first message may be time aligned with a second message transmitted from a second wireless node that is associated with the first operator.
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Citations
26 Claims
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1. A method for wireless communication, comprising:
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determining, at a first wireless node, that a channel is busy due to a second wireless node based at least in part on a clear channel assessment (CCA) procedure performed on the channel, the first wireless node associated with a first operator; decoding, at the first wireless node, a header of a message transmitted by the second wireless node, the header comprising an indication of the second wireless node being associated with the first operator; exchanging radio frame configuration information with the second wireless node via a wireless wide area network (WWAN) communication channel, the radio frame configuration information comprising a timing synchronization field for time aligning a first message associated with the first wireless node and a second message transmitted from the second wireless node and a CCA configuration field for synchronizing the CCA procedure at the first wireless node with a CCA procedure at the second wireless node such that the CCA procedure at the first wireless node is in alignment with the CCA procedure at the second wireless node; and transmitting the first message on the channel busy due to the second wireless node during a subframe based at least in part on the indication, the first message time aligned in the subframe with the second message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for wireless communication, 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; determine, at a first wireless node, that a channel is busy due to a second wireless node based at least in part on a clear channel assessment (CCA) procedure performed on the channel, the first wireless node associated with a first operator; decode, at the first wireless node, a header of a message transmitted by the second wireless node, the header comprising an indication of the second wireless node being associated with the first operator; exchange radio frame configuration information with the second wireless node via a wireless wide area network (WWAN) communication channel, the radio frame configuration information comprising a timing synchronization field for time aligning a first message associated with the first wireless node and a second message transmitted from the second wireless node and a CCA configuration field for synchronizing the CCA procedure at the first wireless node with a CCA procedure at the second wireless node such that the CCA procedure at the first wireless node is in alignment with the CCA procedure at the second wireless node; and transmit the first message on the channel busy due to the second wireless node during a subframe based at least in part on the indication, the first message time aligned in the subframe with the second message. - View Dependent Claims (22, 23, 24)
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25. An apparatus for wireless communication, comprising:
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means for determining, at a first wireless node, that a channel is busy due to a second wireless node based at least in part on a clear channel assessment (CCA) procedure performed on the channel, the first wireless node associated with a first operator; means for decoding, at the first wireless node, a header of a message transmitted by the second wireless node, the header comprising an indication of the second wireless node being associated with the first operator; means for exchanging radio frame configuration information with the second wireless node via a wireless wide area network (WWAN) communication channel, the radio frame configuration information comprising a timing synchronization field for time aligning a first message associated with the first wireless node and a second message transmitted from the second wireless node and a CCA configuration field for synchronizing the CCA procedure at the first wireless node with a CCA procedure at the second wireless node such that the CCA procedure at the first wireless node is in alignment with the CCA procedure at the second wireless node; and means for transmitting the first message on the channel busy due to the second wireless node during a subframe based at least in part on the indication, the first message time aligned in the subframe with the second message.
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26. A non-transitory computer-readable medium storing computer-executable code for wireless communication, the code executable by a processor to:
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determine, at a first wireless node, that a channel is busy due to a second wireless node based at least in part on a clear channel assessment (CCA) procedure performed on the channel, the first wireless node associated with a first operator; decode, at the first wireless node, a header of a message transmitted by the second wireless node, the header comprising an indication of the second wireless node being associated with the first operator; exchange radio frame configuration information with the second wireless node via a wireless wide area network (WWAN) communication channel, the radio frame configuration information comprising a timing synchronization field for time aligning a first message associated with the first wireless node and a second message transmitted from the second wireless node and a CCA configuration field for synchronizing the CCA procedure at the first wireless node with a CCA procedure at the second wireless node such that the CCA procedure at the first wireless node is in alignment with the CCA procedure at the second wireless node; and transmit the first message on the channel busy due to the second wireless node during a subframe based at least in part on the indication, the first message time aligned in the subframe with the second message.
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Specification