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US 12,513,673 B2Granted
Backscatter communication method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsHuang Huang, Hua Shao, Mao Yan
Life of this patent
Estimating the term…
Abstract
A backscatter communication method and apparatus provides operation including: receiving a first excitation signal from a first device; determining a first resource based on a candidate resource; and sending a backscattered signal of the first excitation signal to a second device based on the first resource. This can reduce a probability of selecting a same resource as another device to some extent, so that a conflict is reduced, and an access success rate of a backscatter device can be improved.
Claims18
A backscatter communication method, comprising:
- receiving a first excitation signal from a first device;
- determining a first resource based on a candidate resource;
- wherein the first resource is a frequency domain resource, wherein:
- the candidate resource is a frequency domain resource;
- the first resource is determined based on a first offset step and a first factor, wherein the first offset step is a frequency offset step, and the frequency offset step is greater than or equal to bandwidth of the first excitation signal, and wherein determining the first resource comprises multiplying the first offset step and the first factor;
- and
- the determining of the first resource based on the candidate resource includes:
- selecting the first resource from candidate resources;
- wherein, when the first factor for determining the first resource is a default value or a preset value, the candidate resources comprise candidate offset steps, the selecting the first resource from candidate resources comprises selecting one of the candidate offset steps as the first offset step according to a rule that is configured to enable different scatter devices to select different offset steps;
- wherein, when the first offset step for determining the first resource is a default value or a preset value, the candidate resources comprise candidate factors, the selecting the first resource from candidate resources comprises selecting one of the candidate factors as the first factor according to a rule that is configured to enable different scatter devices to select different factors;
- wherein when the candidate resources comprise candidate offset steps and candidate factors, the selecting the first resource from candidate resources comprises at least one of:
- (i) selecting one of the candidate factors as the first factor according to a rule that is configured to enable different scatter devices to select different factors or (ii) selecting one of the candidate offset steps as the first offset step according to the rule that is configured to enable different scatter devices to select different offset steps;
- and
- sending a backscattered signal of the first excitation signal to a second device based on the first resource.
11 more elements
A backscatter communication method, comprising:
- receiving a backscattered signal that is of a first excitation signal and that is sent by a third device based on a first resource, wherein the first resource is determined based on a candidate resource, wherein the first resource is a frequency domain resource, wherein:
- the candidate resource is a frequency domain resource;
- the first resource is determined based on a first offset step and a first factor, wherein the first offset step is a frequency offset step, and the frequency offset step is greater than or equal to bandwidth of the first excitation signal, and wherein determining the first resource comprises multiplying the first offset step and the first factor;
- and
- the determination of the first resource based on the candidate resource includes:
- selecting the first resource from candidate resources, where each one of the candidate resources is determined based on an offset step and a factor;
- wherein, when the first factor for determining the first resource is a default value or a preset value, the candidate resources comprise candidate offset steps, the selecting the first resource from candidate resources comprises selecting one of the candidate offset steps as the first offset step according to a rule that is configured to enable different scatter devices to select different offset steps;
- wherein, when the first offset step for determining the first resource is a default value or a preset value, the candidate resources comprise candidate factors, the selecting the first resource from candidate resources comprises selecting one of the candidate factors as the first factor according to a rule that is configured to enable different scatter devices to select different factors;
- and
- wherein when the candidate resources comprise candidate offset steps and candidate factors, the selecting the first resource from candidate resources comprises at least one of:
- (i) selecting one of the candidate factors as the first factor according to a rule that is configured to enable different scatter devices to select different factors or (ii) selecting one of the candidate offset steps as the first offset according to the rule that is configured to enable different scatter devices to select different offset steps.
8 more elements
An apparatus for performing backscatter communication, the apparatus comprising a processor at least configured to:
- receive a first excitation signal from a first device;
- determine a first resource based on a candidate resource;
- wherein the first resource is a frequency domain resource, wherein:
- the candidate resource is a frequency domain resource;
- the first resource is determined based on a first offset step and a first factor, wherein the first offset step is a frequency offset step, and the frequency offset step is greater than or equal to bandwidth of the first excitation signal, and wherein determination of the first resource comprises multiplication of the first offset step and the first factor;
- and
- the determination of the first resource based on the candidate resource includes:
- selection the first resource from candidate resources;
- wherein, when the first factor for determination of the first resource is a default value or a preset value, the candidate resources comprise candidate offset steps, the selection of the first resource from candidate resources comprises selection of one of the candidate offset steps as the first offset step according to a rule that is configured to enable different scatter devices to select different offset steps;
- wherein, when the first offset step for determination of the first resource is a default value or a preset value, the candidate resources comprise candidate factors, the selection of the first resource from candidate resources comprises selection of one of the candidate factors as the first factor according to a rule that is configured to enable different scatter devices to select different factors;
- wherein when the candidate resources comprise candidate offset steps and candidate factors, the selection of the first resource from candidate resources comprises at least one of:
- (i) selection of one of the candidate factors as the first factor according to a rule that is configured to enable different scatter devices to select different factors or (ii) selection of one of the candidate offset steps as the first offset step according to the rule that is configured to enable different scatter devices to select different offset steps;
- and
- send a backscattered signal of the first excitation signal to a second device based on the first resource.
11 more elements
Dependencies are inferred from the claim text.