Asynchronous channel reservation design with partial symbol alignment
First Claim
1. A method of wireless communication, comprising:
- performing, by a transmitter node, a listen before talk (LBT) procedure on a transmission channel shared by one or more synchronous or asynchronous network nodes;
transmitting, by the transmitter node, a fixed-length preamble in response to passing the LBT procedure;
transmitting, by the transmitter node, a dynamic length cyclic prefix after the preamble, wherein the dynamic length cyclic prefix includes a normal cyclic prefix plus a dynamic period; and
transmitting, by the transmitter node, a channel reservation message after the dynamic length cyclic prefix.
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Abstract
An asynchronous channel reservation design is disclosed having a partial symbol alignment. The transmitting node performs a listen before talk (LBT) procedure on a transmission channel shared by one or more transmission/reception points (TRPs). Upon detecting passing the LBT, a preamble is transmitted followed by a dynamic length cyclic prefix that includes the normal cyclic prefix plus an additional variable period. The transmitter then transmits the channel reservation message after the dynamic length cyclic prefix. On the detector side, once the preamble is detected, the detecting node assumes a normal cyclic prefix before attempting to detect and decode the channel reservation information in the message. Using a demodulation reference signal (DMRS) in the channel reservation message, the detecting node may detect the channel reservation message information from the shifted version of the detected message.
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Citations
14 Claims
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1. A method of wireless communication, comprising:
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performing, by a transmitter node, a listen before talk (LBT) procedure on a transmission channel shared by one or more synchronous or asynchronous network nodes; transmitting, by the transmitter node, a fixed-length preamble in response to passing the LBT procedure; transmitting, by the transmitter node, a dynamic length cyclic prefix after the preamble, wherein the dynamic length cyclic prefix includes a normal cyclic prefix plus a dynamic period; and transmitting, by the transmitter node, a channel reservation message after the dynamic length cyclic prefix. - View Dependent Claims (2, 3, 4, 5)
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6. A method of wireless communication, comprising:
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monitoring, by a network node, for a channel reservation fixed-length preamble from one or more neighboring transmitters; assuming, by the network node, a normal cyclic prefix after the channel reservation preamble in response to detection of the channel reservation preamble; decoding, by the network node, a signal over a symbol length after the normal cyclic prefix, wherein the decoding the signal is to decode a channel reservation message. - View Dependent Claims (7)
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8. An apparatus configured for wireless communication, the apparatus comprising:
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at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured; to perform, by a transmitter node, a listen before talk (LBT) procedure on a transmission channel shared by one or more synchronous or asynchronous network nodes; to transmit, by the transmitter node, a fixed-length preamble in response to passing the LBT procedure; to transmit, by the transmitter node, a dynamic length cyclic prefix after the preamble, wherein the dynamic length cyclic prefix includes a normal cyclic prefix plus a dynamic period; and to transmit, by the transmitter node, a channel reservation message after the dynamic length cyclic prefix. - View Dependent Claims (9, 10, 11, 12)
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13. An apparatus configured for wireless communication, the apparatus comprising:
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at least one processor; and a memory coupled to the at least one processor, wherein the at least one processor is configured; to monitor, by a network node, for a channel reservation fixed-length preamble from one or more neighboring transmitters; to assume, by the network node, a normal cyclic prefix after the channel reservation preamble in response to detection of the channel reservation preamble; to decode, by the network node, a signal over a symbol length after the normal cyclic prefix, wherein the program code executable by the computer for causing the computer to decode the signal is to decode a channel reservation message. - View Dependent Claims (14)
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Specification