Device, Network, and Method for Communications with Carrier Sensing and Coexistence
AssigneeFuturewei Technologies, Inc.
InventorsJialing Liu, Fei Teng, Zhiyi Zhou, Weimin Xiao
Life of this patent
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Abstract
A network and method for wireless communications are provided. A first network element in the network may transmit a first reservation signal to reserve a channel. The first reservation signal may at least partially overlap a second reservation signal transmitted by a second network element for channel reservation. The first network element and the second network element share the same channel. The first network element may also perform interference cancellation to cancel the second reservation signal transmitted by the second network element for carrier sensing.
Claims20
A method for wireless communications, comprising:
- sensing, by a second network element, a first reservation signal transmitted by a first network element in a sensing region of a frame communicated over a carrier, wherein the first network element and the second network element share the carrier;
- performing, by the second network element, interference cancellation on sensed signals of the second network element to remove the first reservation signal from the sensed signals, thereby generating a residual sensed signal;
- and
- transmitting, by the second network element, a second reservation signal in the sensing region of the frame when a power level of the residual sensed signal is less than a threshold.
A second network element comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
- sense a first reservation signal transmitted by a first network element in a sensing region of a frame communicated over a carrier;
- perform interference cancellation on sensed signals of the second network element to remove the first reservation signal from the sensed signals, thereby generating a residual sensed signal;
- and
- transmit a second reservation signal in the sensing region of the frame when a power level of the residual sensed signal is less than a threshold.
A method for wireless communications, comprising:
- sensing, by a first network element, a first set of frequency subcarriers of a carrier in a sensing region of a frame;
- determining, by the first network element, that the carrier is unoccupied when a power level of sensed signals in the first set of frequency subcarriers is greater than a threshold;
- and
- transmitting, by the first network element, a first reservation signal over the first set of frequency subcarriers of the carrier in the sensing region, wherein the first reservation signal at least partially overlaps a second reservation signal in the time domain, the second reservation signal being transmitted by a second network element over a second set of frequency subcarriers of the carrier orthogonal to the first set of frequency subcarriers, and the first network element being within a listening distance of the second network element.
A first network element comprising:
- a processor;
- and
- a non-transitory computer readable storage medium storing programming for execution by the processor, the programming including instructions to:
- sense a first set of frequency subcarriers of a carrier in a sensing region of a frame;
- determine that the carrier is unoccupied when a power level of sensed signals in the first set of frequency subcarriers is greater than a threshold;
- and
- transmit a first reservation signal over the first set of frequency subcarriers of the carrier in the sensing region of the frame, wherein the first reservation signal at least partially overlaps a second reservation signal in the time domain, the second reservation signal being transmitted by a second network element over a second set of frequency subcarriers of the carrier orthogonal to the first set of frequency subcarriers, and the first network element being within a listening distance of the second network element.
Dependencies are inferred from the claim text.