CN112311422B

CN112311422B - Signal transmission method and device

Info

Publication number: CN112311422B
Application number: CN201910690757.0A
Authority: CN
Inventors: 邵华; 黄煌; 颜矛; 高宽栋
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2022-04-12
Anticipated expiration: 2039-07-29
Also published as: WO2021017702A1; CN112311422A

Abstract

The embodiment of the application provides a signal transmission method and a signal transmission device, wherein the method comprises the following steps: transmitting N first signals to the tag device; and receiving an indication of a second signal from the receiving device, the second signal being a signal transmitted by the tag device to the receiving device, the N first signals including the one first signal to which the second signal corresponds. Illustratively, the first signal is a reference signal or a synchronization signal, and the second signal is a random access preamble. By adopting the method and the device provided by the application, the N first signals are sent to the label equipment, so that when the label equipment completes charging, the second signal corresponding to the first signal in the N received first signals is sent to the sending equipment through the receiving equipment, the sending equipment can determine the charging time of the label equipment according to the indication of the second signal, seamless butt joint with the label equipment can be realized in the subsequent communication process with the label equipment, data can be transmitted to the label equipment in time, and the resource utilization rate of the system is improved.

Description

Signal transmission method and device

Technical Field

The present application relates to the field of wireless communication technologies, and in particular, to a signal transmission method and apparatus.

Background

Backscattering communication (backscattering communication) is a passive Radio Frequency Identification (RFID) communication technology with extremely low power consumption and low cost, and is suitable for internet of things (IoT) and other scenes sensitive to power consumption. In the backscatter communication technology, three nodes may be included: a transmitting device, a tag device and a receiving device. The transmitting device may transmit the excitation signal. After receiving the excitation signal, the tag device modulates data to be transmitted onto the excitation signal to obtain a reflection signal, and transmits the reflection signal to the receiving device.

Disclosure of Invention

The embodiment of the application provides a signal transmission method and a signal transmission device, which are used for determining the charging time required by label equipment.

In a first aspect, a signal transmission method is provided, including: transmitting N first signals to the tag device; wherein N is a positive integer; receiving an indication of a second signal from a receiving device, the second signal corresponding to one first signal, the N first signals including the one first signal to which the second signal corresponds. The second signal is a signal transmitted by the tag device to the receiving device.

By the method, the N first signals are sent to the label device, so that the label device sends the second signal corresponding to the first signal in the N received first signals to the sending device through the receiving device when the label device completes charging, the sending device can determine the charging time required by the label device according to the indication of the second signal, seamless connection with the label device can be achieved in the subsequent communication process with the label device, data are transmitted to the label device when the label device completes charging, the resource utilization rate of a system is improved, and the reliability of communication is guaranteed.

In one possible design, the method further includes: and sending configuration information to the tag device, wherein the configuration information is used for indicating the corresponding relation between the N first signals and the M second signals, and M is a positive integer.

As can be seen from the above, in the embodiment of the present application, the corresponding relationship between the N first signals and the M second signals is indicated through the configuration information, so that the receiving device and the tag device use the corresponding relationship to indicate the second signals corresponding to the first signals, and thus the first signals received when the tag device completes charging can be determined, and thus the charging time required by the tag device can be determined.

In one possible design, the configuration information is used to indicate a correspondence between the N first signals and the M second signals, and includes: for one of the N first signals, the configuration information is used to indicate at least one of:

the signal identification of the second signal corresponding to the first signal; a time domain resource for transmitting a second signal corresponding to the one first signal; a frequency domain resource for transmitting a second signal corresponding to the one first signal; and, the sequence parameter of the second signal corresponding to said one first signal.

As can be seen from the above, in the embodiment of the present application, there are multiple implementation manners for the correspondence between the N first signals and the M second signals, and one or more implementation manners may be selected according to actual situations, so as to improve robustness and implementation flexibility of the system.

In one possible design, the second signal corresponds to a first signal, including: the one first signal is a signal transmitted over time unit n and the second signal is a signal transmitted over time unit n + k, where n is an integer and k is an integer greater than or equal to 0. By the method, the incidence relation between the first signal and the second signal is established in the sending time sequence, and the signaling overhead can be reduced.

In one possible design, the value of k is a preconfigured value or a value that is signaled to the tag device.

In one possible design, the first signal is a reference signal or a synchronization signal.

In one possible design, the second signal is a random access preamble.

As can be seen from the above, in the embodiment of the present application, the charging time required by the tag device is determined by multiplexing the transmission of the random access preamble, so as to avoid excessive modification of the protocol.

In one possible design, the method further includes: and determining the charging time of the tag device according to the second signal and the corresponding relation between the second signal and the first signal.

As can be seen from the above, in the embodiment of the present application, the charging time of the tag device is determined according to the first signal corresponding to the second signal, which is simple to implement, and the charging time can be determined according to the granularity of each tag device, thereby overcoming the problem that in the prior art, only a uniform charging duration method can be adopted, which results in that part of tag devices cannot be charged within the uniform charging duration, or charging is completed in advance within the uniform charging duration, and thus resources are wasted.

In a second aspect, an apparatus is provided, which may be a sending device, an apparatus in a sending device, or an apparatus capable of being used with a sending device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the first aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a communication module. Illustratively, the tag device includes a communication module for transmitting N first signals to the tag device; wherein N is a positive integer; receiving an indication of a second signal from a receiving device, the second signal corresponding to one first signal, the N first signals including the one first signal to which the second signal corresponds.

And the processing module is used for determining the charging time of the tag equipment according to the indication of the second signal. The second signal is a signal transmitted by the tag device to the receiving device.

The processing module and other methods executed by the communication module may refer to the description in the first aspect, and are not described herein again.

In a third aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the first aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the first aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

a processor for transmitting N first signals to the tag device using the communication interface; wherein N is a positive integer; receiving an indication of a second signal from a receiving device, the second signal corresponding to one first signal, the N first signals including the one first signal to which the second signal corresponds. The second signal is a signal transmitted by the tag device to the receiving device.

Other methods performed by the processor may refer to the description in the first aspect, and are not described herein.

In a fourth aspect, a signal transmission method is provided, including: receiving a first signal from a transmitting device; determining a second signal from the first signal, the second signal corresponding to the first signal; and transmitting the second signal to a receiving device.

In one possible design, the method further includes:

receiving configuration information from the sending device, where N, M is a positive integer, the N first signals include the first signals, and the M second signals include the second signals, and the configuration information is used to indicate a correspondence relationship between the N first signals and the M second signals.

In one possible design, the configuration information is used to indicate a correspondence between N first signals and M second signals, and includes:

for one of the N first signals, the configuration information is used to indicate at least one of:

the signal identification of the second signal corresponding to the first signal; a time domain resource for transmitting a second signal corresponding to the one first signal; a frequency domain resource for transmitting a second signal corresponding to the one first signal; and, a sequence parameter of a second signal corresponding to said any first signal.

In one possible design, the second signal corresponds to the first signal, including: the first signal is a signal transmitted over a time unit n and the second signal is a signal transmitted over a time unit n + k, where n is an integer and k is an integer greater than or equal to 0.

In one possible design, the second signal is a random access preamble.

In a fifth aspect, an apparatus is provided, which may be a label device, an apparatus in a label device, or an apparatus capable of matching with a label device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the fourth aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a communication module. Illustratively, the apparatus includes a communication module to receive a first signal from a transmitting device.

A processing module to determine a second signal from the first signal, the second signal corresponding to the first signal.

And the communication module is used for sending the second signal to receiving equipment.

The processing module and other methods executed by the communication module may refer to the description in the fourth aspect, and are not described herein again.

In a sixth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the fourth aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the fourth aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

a processor for receiving a first signal from a transmitting device using a communication interface; determining a second signal from the first signal, the second signal corresponding to the first signal; and transmitting the second signal to a receiving device.

Other methods performed by the processor may refer to the description in the fourth aspect, and are not described herein.

In a seventh aspect, an embodiment of the present application provides a signal transmission method, including: receiving a second signal from the tag device; an indication of the second signal, the second signal corresponding to one of the first signals, is transmitted to a transmitting device. The one first signal is a first signal transmitted by the transmitting device to the tag device.

Through the method, the receiving device determines one first signal corresponding to the second signal according to the second signal, so that the charging of the tag device is determined to be completed according to the one first signal. The receiving device may enable the sending device to determine, according to the indication of the second signal, that the tag device receives one first signal corresponding to the second signal by sending the indication of the second signal to the sending device, so that the sending device determines the charging time required by the tag device.

In one possible design, the second signal is a random access preamble.

In an eighth aspect, an apparatus is provided, which may be a receiving device, an apparatus in a receiving device, or an apparatus capable of being used with a receiving device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the seventh aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a communication module. Illustratively, the tag device includes a communication module for receiving a second signal from the tag device;

a processing module to determine an indication of a second signal, the second signal corresponding to a first signal, the first signal being a first signal transmitted by the transmitting device to the tag device.

A communication module to send an indication of the second signal to a sending device.

The processing module and other methods performed by the communication module may refer to the description in the seventh aspect, and are not described herein again.

In a ninth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the seventh aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the seventh aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

a processor for receiving a second signal from the tag device using the communication interface; an indication to transmit the second signal to a transmitting device, the second signal corresponding to one first signal, the one first signal being a first signal of N first signals transmitted by the transmitting device to the tag device, N being a positive integer.

Other methods performed by the processor may refer to the description in the seventh aspect, and are not described herein.

In a tenth aspect, an embodiment of the present application provides a signal transmission method, including: transmitting N first signals to the tag device; n is a positive integer; receiving a charge time indication from a receiving device; the charging time indication is used for indicating the charging time required by the label equipment; and determining the charging time required by the tag device according to the charging time indication.

By the method, the N first signals are sent to the label device, so that the charging time indication can be obtained from the receiving device when the label device completes charging, the sending device can determine the charging time required by the label device according to the charging time indication, seamless butt joint with the label device can be achieved in the subsequent communication process with the label device, data are transmitted to the label device when the label device completes charging, the resource utilization rate of a system is improved, and the reliability of communication is guaranteed.

In one possible design, before receiving the indication of the first signal from the receiving device, the method further includes:

and sending capability query information to the tag device, wherein the capability query information is used for requesting the indication of the first signal.

In an eleventh aspect, an apparatus is provided, which may be a sending device, an apparatus in a sending device, or an apparatus capable of being used with a sending device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the tenth aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a communication module. Illustratively, the tag device includes a communication module for transmitting N first signals to the tag device; n is a positive integer; receiving a charge time indication from a receiving device; the charge time indication indicates a charge time required for the tag device.

And the processing module is used for determining the charging time required by the label equipment according to the charging time indication.

The processing module and other methods executed by the communication module may refer to the description in the tenth aspect, and are not described herein again.

In a twelfth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the tenth aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the tenth aspect. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

a processor for transmitting N first signals to the tag device using the communication interface; n is a positive integer; receiving a charge time indication from a receiving device; the charging time indication is used for indicating the charging time required by the label equipment; and determining the charging time required by the tag device according to the charging time indication.

Other methods performed by the processor may refer to the description in the tenth aspect, and are not described herein.

In a thirteenth aspect, an embodiment of the present application provides a signal transmission method, including: receiving a first signal from a transmitting device; determining an indication of the first signal according to the first signal, wherein the indication of the first signal is used for indicating a first signal received by a tag device in N first signals, and N is a positive integer; an indication of the first signal is transmitted to a receiving device.

In a fourteenth aspect, an apparatus is provided, which may be a label device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the thirteenth aspect, where the module may be a hardware circuit, a software circuit, or a combination of a hardware circuit and a software circuit. In one design, the apparatus may include a processing module and a communication module.

Illustratively, a communication module for receiving a first signal from a transmitting device;

and the processing module is used for determining the indication of the first signal according to the first signal, the indication of the first signal is used for indicating the first signal received by the tag device in N first signals, and N is a positive integer.

A communication module to send an indication of the first signal to a receiving device.

The processing module and other methods performed by the communication module may refer to descriptions in the thirteenth aspect, and are not described herein again.

In a fifteenth aspect, an embodiment of the present application provides an apparatus, which includes a processor, and is configured to implement the method described in the thirteenth aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the thirteenth aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

a processor for receiving a first signal from a transmitting device using a communication interface; determining an indication of the first signal according to the first signal, wherein the indication of the first signal is used for indicating a first signal received by a tag device in N first signals, and N is a positive integer; an indication of the first signal is transmitted to a receiving device.

Other methods performed by the processor may refer to the description in the thirteenth aspect, and are not described herein.

In a sixteenth aspect, an embodiment of the present application provides a signal transmission method, including: receiving an indication of a first signal from a tag device; determining a charging time required for the tag device according to the indication of the first signal; transmitting a charge time indication to a transmitting device; the charge time indication indicates a charge time required for the tag device.

By the above method, after the receiving device determines the charging time required by the tag device according to the indication of the first signal, the receiving device transmits the charging time indication to the transmitting device, so that the transmitting device can accurately determine the charging time required by the tag device according to the charging time indication.

In a seventeenth aspect, an apparatus is provided, which may be a receiving device, an apparatus in a receiving device, or an apparatus capable of being used with a receiving device. In one design, the apparatus may include a module corresponding to one or more of the methods/operations/steps/actions described in the sixteenth aspect, where the module may be implemented by hardware circuit, software, or a combination of hardware circuit and software. In one design, the apparatus may include a processing module and a communication module. Illustratively, the tag device includes a communication module to receive an indication of a first signal from the tag device; transmitting a charge time indication to a transmitting device; the charge time indication indicates a charge time required for the tag device.

And the processing module is used for determining the charging time required by the label equipment according to the indication of the first signal.

The processing module and other methods executed by the communication module may refer to the descriptions in the sixteenth aspect, and are not described herein again.

In an eighteenth aspect, embodiments of the present application provide an apparatus, which includes a processor, and is configured to implement the method described in the sixteenth aspect. The apparatus may also include a memory to store instructions and data. The memory is coupled to the processor, and the processor, when executing the instructions stored in the memory, may implement the method described in the seventh aspect above. The apparatus may also include a communication interface for the apparatus to communicate with other devices, such as a transceiver, circuit, bus, module, or other type of communication interface, which may be network devices. In one possible arrangement, the apparatus comprises:

a memory for storing program instructions;

a processor to receive, using the communication interface, an indication of a first signal from a tag device; determining a charging time required for the tag device according to the indication of the first signal; transmitting a charge time indication to a transmitting device; the charge time indication indicates a charge time required for the tag device.

Other methods performed by the processor may refer to the description in the sixteenth aspect, and are not described herein.

In a nineteenth aspect, an embodiment of the present application provides a signal transmission method, including: transmitting N first signals to the tag device; sending end indication information to the label equipment, wherein the end indication information is used for indicating that all the N first signals are sent; receiving a timing time from receiving equipment, and determining the charging time required by the label equipment according to the timing time; alternatively, the charging time required for the tag device is received from the receiving device.

By the method, the N first signals and the ending indication information are sent to the label device, so that the timing duration from the receiving device or the charging time required by the label device can be received when the label device completes charging, the time for completing charging of the label device can be accurately determined in the subsequent communication process with the label device, seamless connection with the label device is realized, data are transmitted to the label device when the label device completes charging, the resource utilization rate of a system is improved, and the reliability of communication is guaranteed.

The present application also provides a communication apparatus having a function of implementing the transmitting device in the method provided by the nineteenth aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or units corresponding to the above functions.

In one possible implementation, the communication device includes: a processor configured to support the communication apparatus to perform a corresponding function of the transmitting device in the above-illustrated communication method. The communication device may also include a memory, which may be coupled to the processor, that retains program instructions and data necessary for the communication device. Optionally, the communication apparatus further comprises a communication interface for supporting communication between the communication apparatus and a tag device, a receiving device, or the like.

In one possible implementation, the communication device comprises corresponding functional units, each for implementing the steps in the above method. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a possible implementation manner, the structure of the communication device includes a processing unit and a transceiver unit, and these units may perform corresponding functions in the foregoing method example, which is specifically referred to the detailed description in the method example, and are not described herein again.

In a twentieth aspect, an embodiment of the present application provides a signal transmission method, including: after receiving the first signal, starting a timer; if the ending indication information is received, closing the timer, and determining the timing duration recorded by the timer, wherein the ending indication information is used for indicating that all the N first signals are sent; sending the timing duration to receiving equipment, or determining the charging time required by the label equipment according to the timing duration; and sending the timing duration or the charging time required by the label equipment to receiving equipment.

The present application also provides a communication device having a function of implementing the tag device in the method provided by the twentieth aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or units corresponding to the above functions.

In one possible implementation, the communication device includes: a processor configured to support the communication apparatus to perform the corresponding functions of the tag device in the above-illustrated communication method. The communication device may also include a memory, which may be coupled to the processor, that retains program instructions and data necessary for the communication device. Optionally, the communication apparatus further comprises a communication interface for supporting communication between the communication apparatus and a sending device, a receiving device, or the like.

In a possible implementation form, the communication device comprises corresponding functional units, each for implementing the steps in the method of the above twentieth aspect. The functions may be implemented by hardware, or by hardware executing corresponding software. The hardware or software includes one or more units corresponding to the above functions.

In a possible implementation manner, the structure of the communication device includes a processing unit and a transceiver unit, and these units may perform corresponding functions in the method example of the twentieth aspect, for specific reference, detailed descriptions in the method example are given, and details are not described herein.

In a twenty-first aspect, an embodiment of the present application provides a signal transmission method, including: receiving a timing duration from the label equipment or charging time required by the label equipment; and sending the timing duration to sending equipment, or determining the charging time required by the label equipment according to the timing duration, and sending the charging time required by the label equipment to the sending equipment.

The present application also provides a communication apparatus having a function of implementing the receiving device in the method provided by the twenty-first aspect. The function can be realized by hardware, and can also be realized by executing corresponding software by hardware. The hardware or software includes one or more units or units corresponding to the above functions.

In one possible implementation, the communication device includes: a processor configured to support the communication apparatus to perform a corresponding function of the receiving device in the above-illustrated communication method. The communication device may also include a memory, which may be coupled to the processor, that retains program instructions and data necessary for the communication device. Optionally, the communication apparatus further comprises a communication interface for supporting communication between the communication apparatus and the tag device, the transmitting device, or the like.

In a twenty-second aspect, embodiments of the present application provide a computer-readable storage medium having computer-readable instructions stored thereon, which, when read and executed by a computer, cause the computer to perform the method of any one of the above possible designs.

In a twenty-third aspect, the embodiments of the present application provide a computer program product, which when read and executed by a computer, causes the computer to perform the method of any one of the above possible designs.

In a twenty-fourth aspect, an embodiment of the present application provides a chip, where the chip is connected to a memory, and is configured to read and execute a software program stored in the memory, so as to implement the method in any one of the above possible designs.

In a twenty-fifth aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, and is configured to implement the method in any one of the above possible designs. The chip system may be formed by a chip, and may also include a chip and other discrete devices.

Sixteenth, the present application provides a system, which includes the apparatus provided in the second aspect, the apparatus provided in the fifth aspect, and the apparatus provided in the eighth aspect, or includes the apparatus provided in the third aspect, the apparatus provided in the sixth aspect, and the apparatus provided in the ninth aspect, or includes the apparatus provided in the eleventh aspect, the apparatus provided in the fourteenth aspect, and the apparatus provided in the seventeenth aspect, or includes the apparatus provided in the twelfth aspect, the apparatus provided in the fifteenth aspect, and the apparatus provided in the eighteenth aspect, or includes the apparatus provided in the nineteenth aspect, the apparatus provided in the twentieth aspect, and the apparatus provided in the twentieth aspect.

Drawings

Fig. 1 shows a schematic diagram of a communication system suitable for use in the method provided by the embodiments of the present application;

fig. 2 is a schematic flow chart of a signal transmission method according to an embodiment of the present application;

fig. 3 is a schematic diagram of signal transmission according to an embodiment of the present application;

fig. 4 is a schematic diagram of a time-frequency resource provided in an embodiment of the present application;

fig. 5 is a schematic diagram of signal transmission according to an embodiment of the present application;

fig. 6 is a schematic diagram of signal transmission according to an embodiment of the present application;

fig. 7 is a schematic diagram of signal transmission according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a communication device according to an embodiment of the present application.

Detailed Description

The embodiments of the present application will be described in detail below with reference to the drawings attached hereto.

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, both A and B, and B alone, where A, B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least part" may be all or part, for example, "at least part B of a" may represent all B of a, and may also represent part B of a. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b and c can be single or multiple. "A belongs to B" may indicate that A is a subset of B, or may indicate that A has the same content as B. "a includes B" may indicate that B is a subset of a, may also indicate that a has the same content as B, or "a includes B" may indicate that a includes B and other content, or may indicate that only B is included in a.

In the embodiment of the present application, for a technical feature, the technical features in the technical feature are distinguished by "first", "second", "third", "a", "B", "C", and "D", and the like, and the technical features described in "first", "second", "third", "a", "B", "C", and "D" are not in a sequential order or a size order.

The technical scheme provided by the embodiment of the application can be applied to wireless communication among communication devices. The communication device may include a network device, a terminal device, and a tag device. Wireless communication between communication devices may include, but is not limited to: wireless communication between a network device and a terminal device, wireless communication between a network device and a network device, wireless communication between a terminal device and a terminal device, wireless communication between a terminal device and a tag device, and wireless communication between a tag device and a network device. In the embodiments of the present application, the term "wireless communication" may also be simply referred to as "communication", and the term "communication" may also be described as "data transmission", "signal transmission", "information transmission", or "transmission", or the like. In embodiments of the present application, the transmission may comprise sending or receiving. For example, the transmission may be an uplink transmission, for example, the terminal device may send a signal to the network device; the transmission may also be downlink transmission, for example, the network device may send a signal to the terminal device. In the embodiments of the present application, the wireless communication between the communication devices may be described as: the transmitting end transmits a signal to the receiving end, and the receiving end receives the signal from the transmitting end.

The embodiment of the application can be applied to various mobile communication systems, such as: a New Radio (NR) system, a Long Term Evolution (LTE) system, an advanced long term evolution (LTE-a) system, a Universal Mobile Telecommunications System (UMTS), an evolved Long Term Evolution (LTE) system, a future communication system, and other communication systems, and in particular, is not limited herein. The NR system may also be referred to as a fifth generation (5G) mobile communication system.

When the backscatter communication technology is applied to a mobile communication system, such as a 5G system, the transmitting device may be a terminal device, the tag device may be a radio frequency identification module in the terminal device, or may be an independent radio frequency identification chip, and the receiving device may be a network device.

The tag device is a passive device, and data modulation and signal transmission can be performed through the obtained electric energy only by converting the received signal into the electric energy. When the backscatter communication technology is applied to a mobile communication system, how a sending device charges a tag device is an urgent problem to be solved.

For the convenience of understanding the embodiments of the present application, a communication system applicable to the embodiments of the present application will be first described in detail by taking the communication system shown in fig. 1 as an example. Fig. 1 shows a schematic diagram of a communication system suitable for the method provided by the embodiment of the present application. As shown in fig. 1, the communication system includes a transmitting device 101, a tag device 102, and a receiving device 103. It should be noted that fig. 1 is only an example, and in another possible implementation manner, the sending device and the tag device may also be integrated into the same physical entity, which is not described herein again.

It should be noted that, in the communication system shown in fig. 1, the transmitting device 101 may directly transmit a signal to the tag device 102, but in the backscatter communication technology, the tag device 102 may not directly transmit a signal to the transmitting device 101. If the tag device 102 needs to transmit a signal to the transmitting device 101, the signal may be transmitted to the receiving device 103, and then forwarded to the transmitting device 101 by the receiving device 103. The transmitting device 101 and the receiving device 103 may transmit signals to each other.

In fig. 1, the tag device 102 is a passive device or a semi-active device (e.g., baseband active but rf passive), and for this purpose, the tag device 102 needs to perform a charging process before sending a signal. Specifically, the tag device 102 needs to convert a part or all of the received signal into electric energy, so as to realize charging. After obtaining power through the received signal, the tag device 102 may drive its own circuit to communicate. In one possible implementation, the tag device charging time is a fixed duration. When the backscatter communication technology is applied to a mobile communication system, the network coverage of the backscatter communication technology combined with the mobile communication system is wider, and thus one transmitting device may correspond to a plurality of tag devices, and each tag device is located at a different distance from the transmitting device. The greater the distance between the tag device and the transmitting device, the weaker the energy of the signal received by the tag device, and therefore the lower the charging efficiency of the tag device. If the distance between the label equipment and the sending equipment is too large according to the fixed charging time, the label equipment can not be effectively charged; when the distance between the tag device and the transmitting device is too small, the tag device charging time becomes excessive. That is, a fixed charging time cannot be effectively used for the backscatter communication in the mobile communication system. Therefore, when the backscatter communication technology is applied to a mobile communication system, how to determine the charging time required by the tag device for effectively charging the tag device is an urgent problem to be solved.

It should be noted that other names may also exist for the sending device 101, such as an exciter, a helper (helper), an interrogator (interrogator), a reader, a User Equipment (UE), and the like, and for convenience of description, the sending device is generally referred to as a sending device in this embodiment. Accordingly, the tag device 102 may also have other names, such as a reflector, a tag (tag), a reflector (backscatter device), a passive device (passive device), a semi-active device (semi-active device), a signal scattering device (active signal device), a Radio Frequency Identification (RFID) tag (tag), etc., which are collectively referred to as a tag device in the present embodiment for convenience of description. Other names may also exist for the receiving device 103, such as receiver, access point, base station, etc., which are collectively referred to as receiving device in this embodiment for convenience of description.

When the backscatter communication is applied to a mobile communication system, such as 5G, the transmitting device 101 may be a mobile phone (mobile phone), a tablet computer (Pad), a computer with a wireless transceiving function, a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless terminal in self driving (self driving), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transportation safety (transportation safety), a wireless terminal in city (smart city), a wireless terminal in smart home (smart home), and the like. The receiving device 103 may be a wireless access device or a base station, such as an evolved Node B (eNB), a gbb in 5G, a Radio Network Controller (RNC) or a Node B (NB), a Base Station Controller (BSC), a Base Transceiver Station (BTS), a home base station (e.g., home evolved Node B or home Node B, HNB), a Base Band Unit (BBU), an Access Point (AP) in a wireless fidelity (WiFi) system, a wireless relay Node, a wireless backhaul Node, and the like.

The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and as a person of ordinary skill in the art knows that along with the evolution of the network architecture and the appearance of a new service scenario, the technical solution provided in the embodiment of the present application is also applicable to similar technical problems.

Fig. 2 is a schematic flow chart of a signal transmission method according to an embodiment of the present application. In the flow shown in fig. 2, an execution main body for sending the first signal is taken as a sending device, an execution main body for sending the second signal is taken as a tag device, and an execution main body for receiving the second signal is taken as a receiving device for example to describe, and other cases may refer to the description here, and are not described again here. Referring to fig. 2, the method includes:

step 201: the transmitting device transmits the N first signals to the tag device.

Wherein N is a positive integer. The first signal may be a reference signal, a synchronization signal, or another signal transmitted by the transmitting device, such as a broadcast signal, which is not limited in this embodiment of the application.

In the embodiment of the present application, the positive integer may be an integer of 1, 2, 3, or more, and the embodiment of the present application is not limited.

Step 202: the tag device receives a first signal from the transmitting device.

The tag device may receive N1 first signals of the N first signals it transmits from the transmitting device, where N1 is a positive integer less than or equal to N, e.g., N1 is 1, 2, or other positive integer. The received first signal in step 202 may be one of the N1 first signals.

Step 203: and the tag equipment determines a second signal according to the received first signal and sends the second signal to the receiving equipment.

The second signal corresponds to the first signal. The second signal may be a random access preamble, a reference signal, a control channel, or other signals, which is not limited in this embodiment.

Step 204: the receiving device receives a second signal from the tag device.

Step 205: the receiving device sends an indication of the second signal to the sending device.

Optionally, the indication of the second signal is used to indicate the second signal sent by the tag device to a receiving device. The second signal corresponds to one first signal, which is a first signal among N first signals transmitted from the transmitting device to the tag device.

The indication of the second signal may also directly or indirectly indicate a required charging time of the tag device, as will be described in more detail later.

Step 206: the transmitting device receives an indication of the second signal from the receiving device.

Through the above method, when receiving the first signal, the tag device may send a second signal corresponding to the first signal to the receiving device, and the receiving device may determine, according to the second signal, one first signal corresponding to the second signal, so as to determine that the charging of the tag device is completed according to the one first signal. The receiving device may enable the sending device to determine, according to the indication of the second signal, one first signal corresponding to the second signal received by the tag device by sending the indication of the second signal to the sending device, so as to determine the charging time required by the tag device.

Optionally, in another possible implementation manner, the

steps

205 and 206 may be replaced by: the receiving device indicates to the transmitting device the charging time required for the tag device (step 205 '), and the transmitting device receives from the receiving device an indication to determine the charging time required for the tag device (step 206'). Wherein, the charging time required by the tag device can be further described as: the charging time required by the label device, the charging time of the label device, or the charging time of the label device, etc., which are not limited in the embodiments of the present application.

As shown in fig. 3, the transmitting device may transmit N first signals for a first duration. The first duration may be determined by the sending device, may be configured by the receiving device for the sending device through signaling, or may be predefined (i.e., known to the sending device, the tag device, and the receiving device). Each of the N first signals may correspond to a signal index value, and each of the N first signals may include its corresponding signal index value therein. If the length of the first duration is determined by the sending device or configured for the sending device by the receiving device through signaling, the sending device may indicate the length of the first duration to the tag device through the signaling, or the receiving device may indicate the length of the first duration to the tag device through the sending device in a signaling manner.

The value of N may be determined by the sending device, may be configured for the sending device by the receiving device through signaling, or may be predefined. If the value of N is determined by the sending device or configured for the sending device by the receiving device through signaling, the sending device may indicate the value of N to the tag device through signaling, or the receiving device may indicate the value of N to the tag device through the sending device in a signaling manner.

In this embodiment of the present application, the signaling may be one or a combination of multiple types of system messages, broadcast messages, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) Control Elements (CEs), or physical layer control signaling, which is not limited in this embodiment.

The transmitting device may transmit the first signal at a first cycle for a first duration. Alternatively, the sending device may send the first signal in a non-periodic manner within the first duration.

When the sending device sends the first signal according to the first period, the length of the first period may be determined by the sending device, may also be configured for the sending device by the receiving device through signaling, or may be predefined, which is not limited in this embodiment of the present application. Each cycle includes at least one time unit. If the length of the first period is determined by the sending device or configured for the sending device by the receiving device through signaling, the sending device may indicate the length of the first period to the tag device through signaling, or the receiving device may indicate the length of the first period to the tag device through the sending device in a signaling manner.

In this embodiment, a unit of one time unit may be second, millisecond, microsecond, or the like, or may be a common time unit such as a symbol, a subframe, a slot, a micro-slot, a half-frame, a radio frame, or the like, which is not limited in this embodiment. For example, one time unit may be 10 milliseconds, 5 milliseconds, 1 millisecond, 0.5 milliseconds, one subframe, 2 subframes, one slot, and the like.

When the sending device sends the first signal according to the first cycle, an offset value of a time unit in which the first signal is located in one cycle may be determined by the sending device, may also be configured by the receiving device for the sending device through signaling, or may be predefined, which is not limited in this embodiment of the present application. The transmitting device may signal the offset value to the tag device, or the receiving device may signal the offset value to the tag device through the transmitting device. When the offset value is determined by the sending device or configured for the sending device by the receiving device through signaling, the sending device may indicate the offset value to the tag device through signaling, or the receiving device may indicate the offset value to the tag device through the sending device in a signaling manner. The offset value may be at least one time unit. The unit of the time unit corresponding to the offset value and the unit of the time unit corresponding to the first period may be the same or different, and the embodiment of the present application is not limited. For example, a first cycle includes M1 slots, the offset value is M2 slots, M1 is a positive integer, and M2 is an integer with a value ranging from 0 to M1-1; for another example, a first period includes a slot, the offset value has a size of M3 symbols, M3 is an integer having a value ranging from 0 to M4-1, and M4 indicates the number of symbols (e.g., 7 or 14) included in a slot. These examples should not be construed as limiting the scope of the embodiments herein. Optionally, the offset value may be 0.

In this embodiment, before the sending device sends the first signal, the tag device is in a sleep state or a low power consumption state, and at this time, the tag device can only receive the signal, cannot send the signal or can only send a small amount of necessary signals. When the transmitting device transmits the first signal, the tag device may be charged with the received first signal.

In another possible implementation manner, in the process that the sending device sends the N first signals, the sending device may also send at least one third signal to the tag device, where the third signal is dedicated to charging the tag device. And when the tag device receives the third signal, the electromagnetic wave of the third signal is converted into electric energy to be charged.

The third signal may be a monophonic signal, i.e., a continuous sine wave signal, or may also be a polyphonic signal, i.e., a signal with a specified bandwidth, and the third signal may also be other types of signals, which is not limited in this embodiment.

It should be noted that, the tag device converts electromagnetic waves into electric energy for charging by using electromagnetic wave energy, and for a specific charging process, reference may be made to descriptions in the prior art, and details of the embodiment of the present application are not described again. In the process that the sending device sends the N first signals, if the tag device completes charging, the tag device may record information such as a signal index value or a signal identifier of the received first signal, a receiving time of the received first signal, and the like when charging is completed. In practical applications, according to a requirement for charging accuracy or other requirements, the first signal in the method may also be replaced by a second first signal, a first signal with received energy exceeding a threshold, and the like, and the embodiment of the present application is not limited. When the tag device completes charging, the tag device can be in an activated state, and can receive signals and send signals.

The transmitting device may transmit the third signal or may not transmit the third signal, which is not limited in the embodiment of the present application. In the case where the transmitting apparatus transmits the third signal, the transmitting apparatus may transmit the third signal at the second cycle. Alternatively, the transmitting device may also transmit the third signal in a non-periodic manner.

When the sending device sends the third signal according to the second period, the length of the second period may be determined by the sending device, or may be configured for the sending device by the receiving device through signaling, or may be predefined, which is not limited in this embodiment of the present application. When the length of the second period is determined by the sending device or configured for the sending device by the receiving device through signaling, the sending device may indicate the length of the second period to the tag device through the signaling, or the receiving device may indicate the length of the second period to the tag device through the sending device in a signaling manner.

When the sending device sends the third signal according to the second period, the offset value of the time unit in which the first signal is located in one second period may be determined by the sending device, may also be configured by the receiving device for the sending device through signaling, or may be predefined, which is not limited in this embodiment of the present application. The transmitting device may signal the offset value to the tag device, or the receiving device may signal the offset value to the tag device through the transmitting device. When the offset value is determined by the sending device or configured for the sending device by the receiving device through signaling, the sending device may indicate the offset value to the tag device through signaling, or the receiving device may indicate the offset value to the tag device through the sending device in a signaling manner. The offset value may be at least one time unit. The unit of the time unit corresponding to the offset value and the unit of the time unit corresponding to the second period may be the same or different, and the embodiment of the present application is not limited. For example, one second cycle includes M5 slots, the offset value is M6 slots, M5 is a positive integer, and M6 is an integer with a value ranging from 0 to M5-1; for another example, one second period includes one slot, the offset value is M7 symbols, M7 is an integer ranging from 0 to M4-1, and M4 indicates the number of symbols (e.g., 7 or 14) included in one slot. These examples should not be construed as limiting the scope of the embodiments herein. Optionally, the offset value may be 0.

In the process of sending the third signal by the sending device, if the tag device completes charging, the tag device may record information such as a transmission time of a third signal before the received first signal and a transmission time of a third signal before the received first signal when charging is completed. In practical application, according to the requirement on charging accuracy or other requirements, the first signal in the method can be replaced by a second first signal, a first signal with received energy exceeding a threshold value, and the like; and/or the previous third signal in the method may also be replaced by the next third signal or other third signals, and the embodiments of the present application are not limited. When the tag device completes charging, the tag device can be in an activated state, and can receive signals and send signals. The alternative method can be applied to the corresponding method in the embodiments of the present application.

Optionally, in this embodiment of the application, there may be no association between the third signal and the first signal, and at this time, the sending device sends the first signal and the third signal respectively.

Alternatively, there may be an association between the third signal and the first signal, for example, there may be an association between the third signal and the transmission time of the first signal. In one possible implementation, the first signal and the third signal have a fixed time offset therebetween, and the fixed time offset is a preset value. In this case, after the transmission time of the first signal is determined, the transmission time of the third signal associated with the first signal may be determined. In another possible implementation, a positive integer number (e.g., 2, 3, or more) of third signals are evenly distributed between the transmission times of every two first signals.

In this embodiment of the application, when the tag device completes charging, after receiving the first signal, the second signal may be determined in multiple ways, which is described in detail below. Optionally, in practical applications, according to a requirement for charging accuracy or other requirements, the first signal in the method may also be replaced by a second first signal, a first signal with received energy exceeding a threshold, and the like, and the embodiment of the present application is not limited.

In an embodiment one, after a sending device sends N first signals, configuration information may be sent to the tag device, where the configuration information is used to indicate a correspondence relationship between the N first signals and M second signals; or before the sending device sends the N first signals, sending configuration information to the tag device in a previous communication process with the tag device, where the configuration information is used to indicate a correspondence between the N first signals and the M second signals. Optionally, the corresponding relationship may be determined by the sending device and thus indicated to the tag device; or the tag device may be determined by the receiving device and indicated by the sending device, which is not limited in the embodiment of the present application. Wherein M is a positive integer. Alternatively, the sending device may not send the configuration information, and at this time, the correspondence between the N first signals and the M second signals is preconfigured.

It should be noted that, in the embodiment of the present application, one first signal may correspond to only one second signal, one first signal may also correspond to a plurality of second signals, and of course, a plurality of first signals may also correspond to one second signal.

In one implementation manner, the correspondence between the N first signals and the M second signals includes a signal identifier of a second signal corresponding to any one of the N first signals. For example, the correspondence relationship between the N first signals and the M second signals may be as shown in table 1-1.

It should be noted that the identifier of the second signal may specifically be an index value of the second signal.

TABLE 1-1

In table 1-1, one first signal may correspond to one second signal, or may correspond to a plurality of second signals. For example, the 1 st first signal corresponds to one second signal; the 2 nd first signal corresponds to two second signals, and other cases are not described again.

For another example, the plurality of first signals may correspond to one second signal, for example, N is 4, and M is 2, where the correspondence relationship between the N first signals and the M second signals may be as shown in table 1-2.

Tables 1 to 2

In tables 1-2, two first signals correspond to one second signal. Of course, tables 1-2 are only examples, and other situations exist, and are not described herein again.

In the embodiments of the present application, the index value of the first signal in the corresponding relationship between the first signal and the second signal can also be described as an identifier of the first signal, which can also be replaced by a combination of one or more of the following other parameters of the first signal: time domain resource information of the first signal, frequency domain resource information of the first signal, and signal generation parameters of the first signal, etc.

In this implementation manner, the tag device may determine, according to the received first signal, an identifier of the corresponding second signal, so as to send the second signal corresponding to the identifier. For example, when the second signal is a random access preamble, the tag device may determine, according to the first signal, a random access preamble identifier corresponding to the first signal, and send the random access preamble corresponding to the random access preamble identifier to the receiving device. The receiving device receives the second signal, and may determine the first signal received by the tag device according to the correspondence between the first signal and the second signal.

In a possible implementation manner, the correspondence between the N first signals and the M second signals includes a time domain resource or a time domain resource identifier of a second signal corresponding to any one of the N first signals. In this implementation, the first signal does not directly correspond to the second signal, but corresponds to a time domain resource for transmitting the second signal, and the specific content of the second signal transmitted in the time domain resource may not be limited.

For example, as shown in fig. 4, the time-frequency resource includes P time units in the time domain, and includes Q frequency units in the frequency domain, where P and Q are integers greater than 0. The tag device may transmit the second signal in one time-frequency unit, where one time-frequency unit includes 1 time unit and 1 frequency-domain unit.

The time unit may refer to a symbol (e.g., an Orthogonal Frequency Division Multiplexing (OFDM) symbol), a subframe, a slot, and the like. The frequency domain unit may refer to a subcarrier, a Resource Block (RB), a Resource Block Group (RBG), and the like.

For example, the correspondence relationship between the N first signals and the M second signals may be as shown in table 2-1.

TABLE 2-1

It should be noted that, in table 2-1, one first signal may correspond to one time domain resource, or may correspond to multiple time domain resources. For example, the 1 st first signal corresponds to a time domain resource, i.e. time unit 1; the nth first signal corresponds to two time domain resources, i.e., time unit P-1 and time unit P, which are not described again in other cases.

For another example, the plurality of first signals may correspond to one time domain resource, for example, N is 4, and M is 2, where the time domain resource corresponding relationship between the N first signals and the M second signals may be as shown in table 2-2.

Tables 2 to 2

In table 2-2, two first signals correspond to the time domain resource of one second signal. Of course, tables 2-2 are only examples, and other situations exist, and are not described herein again.

In this implementation, the tag device may determine, according to the received first signal, a time domain resource for transmitting the second signal. The tag device may transmit the second signal through the time domain resource. The receiving device receives the second signal, and may determine the first signal received by the tag device according to a correspondence between time domain resources of the first signal and the second signal.

In a possible implementation manner, the correspondence between the N first signals and the M second signals includes frequency domain resources or frequency domain resource identifiers of second signals corresponding to any one of the N first signals. In this implementation, the first signal does not directly correspond to the second signal, but corresponds to a frequency domain resource that transmits the second signal.

For example, the correspondence relationship between the N first signals and the M second signals may be as shown in table 3-1.

TABLE 3-1

It should be noted that, in table 3-1, one first signal may correspond to one frequency domain resource, or may correspond to multiple frequency domain resources. For example, the 1 st first signal corresponds to two frequency domain resources, namely, frequency domain unit and frequency domain unit 2; the nth first signal corresponds to a frequency domain resource, i.e., frequency domain resource Q, which is not described again in other cases.

For another example, the plurality of first signals may correspond to one frequency domain resource, for example, N is 4, and M is 2, where the frequency domain resource correspondence relationship between the N first signals and the M second signals may be as shown in table 3-2.

TABLE 3-2

In table 3-2, two first signals correspond to the frequency domain resources of one second signal. Of course, table 3-2 is only an example, and other situations exist, and are not described herein again.

In this implementation, the tag device may determine, according to the received first signal, a frequency domain resource for transmitting the second signal. The tag device may transmit the second signal through the frequency domain resource. The receiving device receives the second signal, and may determine the first signal received by the tag device according to a correspondence between the frequency domain resources of the first signal and the second signal.

In a possible implementation manner, the correspondence between the N first signals and the M second signals includes a time-frequency resource or a time-frequency resource identifier of a second signal corresponding to any one of the N first signals. In this implementation, the first signal corresponds to a time-frequency resource that transmits the second signal.

Illustratively, the correspondence indicated by the configuration information may be as shown in table 4-1.

TABLE 4-1

For another example, the plurality of first signals may correspond to one time-frequency resource, for example, N is 4, and M is 2, where the time-frequency resource corresponding relationship between the N first signals and the M second signals may be as shown in table 4-2.

TABLE 4-2

In table 4-2, two first signals correspond to the time-frequency resource of one second signal. Of course, table 4-2 is only an example, and other situations exist, and are not described herein again.

In this implementation manner, the tag device may determine, according to the received first signal, a time-frequency resource for transmitting the second signal, and send the second signal through the time-frequency resource. The receiving device receives the second signal, and may determine the first signal received by the tag device according to a correspondence between the time-frequency resources of the first signal and the second signal.

In a possible implementation manner, the correspondence between the N first signals and the M second signals includes sequence parameters or identifiers of the sequence parameters of the second signals corresponding to any one of the N first signals. Wherein the sequence parameters of the second signal may be used to generate the second signal. For example, the sequence of the second signal may be generated by cyclic shifting using a root sequence of a reference ZC (Zadoff-Chu), and the sequence parameter of the second signal may be a root and/or a cyclic shift value corresponding to the second signal. For another example, the sequence of the second signal may be a pseudo-random sequence, and the sequence parameter of the second signal may be an initial value of the pseudo-random sequence, and other cases are not illustrated one by one.

For example, the correspondence relationship between the N first signals and the M second signals may be as shown in table 5-1.

TABLE 5-1

For another example, the plurality of first signals may correspond to one time-frequency resource, for example, N is 4, and M is 2, where the time-frequency resource corresponding relationship between the N first signals and the M second signals may be as shown in table 5-2.

TABLE 5-2

In table 5-2, two first signals correspond to the sequence parameters of one second signal. Of course, table 5-2 is only an example, and other situations exist, and are not described herein again.

In this implementation, the tag device may determine, according to the received first signal, a sequence parameter of a corresponding second signal, and transmit the second signal generated by the sequence parameter. The receiving device receives the second signal, and may determine the first signal received by the tag device according to a correspondence between sequence parameters of the first signal and the second signal.

Of course, the above is only an example, the correspondence relationship between the N first signals and the M second signals may also be other contents, for example, a combination of at least two of the following items may be indicated:

the signal identification of a second signal corresponding to any one first signal;

transmitting a time domain resource of a second signal corresponding to any one of the first signals;

transmitting a frequency domain resource of a second signal corresponding to any one of the first signals;

transmitting a time-frequency resource of a second signal corresponding to any one first signal;

and the sequence parameter of the second signal corresponding to any one first signal.

When the correspondence includes a plurality of items, reference may be made to the foregoing description, which is not repeated herein.

In conjunction with the foregoing description, in step 205, after the receiving device receives the second signal, an indication of the second signal that may be transmitted to the transmitting device; alternatively, as in step 205', after the receiving device receives the second signal, the transmitting device may be indicated the required charging time for the tag device. By this method, the charging time required by the tag device can be directly or indirectly indicated.

The indication of the second signal may indirectly indicate the charging time required by the tag device, for example, the indication of the second signal may be a signal index value of a first signal received by the tag device, or a receiving time of the first signal, or a signal index value of a last third signal before the first signal, a second signal identifier sent by the tag device to the receiving device, a time domain resource identifier of the second signal, a frequency domain resource identifier of the second signal, a time frequency resource identifier of the second signal, a sequence parameter identifier of the second signal, and the like. When the indication of the second signal indirectly indicates the charging time of the tag device, the receiving device may determine the charging time required by the tag device, or may not determine the charging time required by the tag device, and at this time, the transmitting device needs to determine the charging time of the tag device according to the indication of the second signal.

When the charging time required by the tag device is directly indicated, the receiving device may determine, according to the second signal, a first signal received by the tag device or a third signal received by the tag device for completing charging, so that the charging time of the tag device may be determined according to the first signal or the third signal. Wherein the time granularity of the indicated charging time may be: milliseconds, microseconds, symbols (e.g., OFDM symbols), time slots, etc., which are not limited in this embodiment.

In a first possible implementation manner, the receiving device may use, as a starting time of charging the tag device, a sending time of a first signal sent by a first sending device in the N first signals. And when the receiving equipment receives the second signal, the sending time of the first signal corresponding to the second signal is used as the charging finishing time of the tag equipment. And the receiving equipment determines the charging time required by the label equipment according to the time length from the starting time of charging the label equipment to the finishing time of finishing charging the label equipment.

For example, the transmitting device starts to transmit a first signal of the N first signals from a first time, the transmitting time of the first signal corresponding to the second signal received by the receiving device is a second time, and the charging time required by the tag device is a time duration between the first time and the second time.

In a second possible implementation manner, when the sending device sends the third signal, the receiving device may use a sending time of the first third signal sent by the sending device as a starting time for charging the tag device. And when the receiving equipment receives the second signal, the sending time of the first signal corresponding to the second signal is used as the charging finishing time of the tag equipment. The receiving device may determine the charging time required by the tag device according to a time period from a starting time of charging the tag device to an ending time of completing charging the tag device.

In a third possible implementation manner, the receiving device may use a transmission time of the first third signal transmitted by the transmitting device as a starting time for charging the tag device. And when the receiving equipment receives the second signal, taking the sending time of the last third signal before the first signal corresponding to the second signal as the end time of charging completion of the tag equipment. In this implementation, when the receiving device determines the first signal corresponding to the second signal, the receiving device may determine the transmission time of the first signal. The receiving device can thus determine the last third signal transmitted by the transmitting device before the transmission instant of the first signal. The receiving device may determine a time period from a start time of charging the tag device to an end time of completing charging of the tag device as a required charging time of the tag device.

It should be noted that the starting time of charging the tag device may also be a predefined time, or a time of configuring the receiving device or the sending device, which is not limited in this embodiment of the application and is not described herein again. When the time is the time configured by the receiving device, the receiving device may configure the time for the sending device through signaling, or configure the time for the tag device through the sending device. When the time is the time configured by the sending device, the sending device may indicate the time to the receiving device through signaling, and indicate the time to the tag device through signaling.

Accordingly, in step 206, the transmitting device may determine the charging time required by the tag device according to the indication of the second signal. Alternatively, in step 206', the transmitting device may receive the charging time required by the tag device.

When the receiving device directly indicates the charging time required by the tag device to the transmitting device, the transmitting device may directly determine the charging time required by the tag device.

When the receiving device indirectly indicates the charging time required by the tag device to the transmitting device through the indication of the second signal, the transmitting device may determine the charging time required by the tag device according to information such as a signal index value of the first signal indicated by the indication of the second signal, or a receiving time of the first signal, or a signal index value of a last third signal before the first signal. The method for determining the charging time required by the tag device by the sending device may be the same as the method for determining the charging time required by the tag device by the receiving device, and is not described herein again.

After the sending device determines the charging time required by the label device, before the next communication with the label device, the label device can be charged according to the charging time, so that the communication efficiency between the sending device and the label device can be improved, and the situation that the label device is fixedly charged for a long time due to the fact that the charging time required by the label device is not determined is avoided. After charging is completed, the transmitting device and/or the receiving device can communicate with the tag device without waiting for a long time for the tag device to complete charging.

In the second embodiment, in this embodiment of the application, the sending device may also configure a timing relationship between transmission of the first signal and transmission of the second signal, instead of sending the configuration information to indicate a correspondence relationship between the first signal and the second signal. The timing relationship may be predefined, may be indicated by the sending device for the tag device and the receiving device through signaling (for example, the sending device indicates for the tag device during the previous data transmission), and may also be indicated by the receiving device for the tag device through the sending device (for example, the receiving device indicates for the tag device during the previous data transmission).

For example, as shown in fig. 5, for one first signal of the N first signals, the time domain resource of the sending device sending the one first signal corresponds to a time unit N, the tag device receives the one first signal in the time unit N, the tag device may send a second signal in the time unit N + k, and the receiving device receives the second signal in the time unit N + k. N is an integer, k is an integer greater than or equal to 0, a value of k may be a preconfigured value, or a value of k may also be a value configured for the tag device by the sending device through signaling (the sending device may also indicate the value to the receiving device through signaling), or a value configured for the tag device by the receiving device through the sending device.

It should be noted that a time unit may correspond to at least one time-frequency resource, each time-frequency resource may occupy the same or different subcarriers or bandwidth portions in the frequency domain in the same time unit, and may occupy the same or different sub-time units in the time domain, where the same time unit includes one or more sub-time units, for example, a time slot includes multiple symbols. Fig. 5 illustrates an example where one time unit corresponds to 4 time-frequency resources, and other cases are not described again. Referring to fig. 5, the tag device specifically sends the second signal in which time-frequency resource in time unit n + k, which is not limited in this embodiment of the application, and the tag device may arbitrarily select one time-frequency resource from 4 time-frequency resources included in time unit n + k to send the second signal, and may also determine the time-frequency resource for sending the second signal in other manners, which is not described herein again.

When the sending device configures a value of k to the tag device, the value may be sent through a corresponding first signal or may be sent through an independent message, which is not limited in this embodiment of the present application.

In this embodiment, the receiving device may receive an indication of the second signal transmitted to the transmitting device or a charging time required by the tag device after receiving the second signal.

When the receiving device directly indicates the charging time required by the tag device to the transmitting device, the receiving device may use a starting time of a time unit occupied by a first signal, which is first sent by the transmitting device, in the N first signals as a starting time of charging of the tag device. When the receiving device receives the second signal, the first signal received by the tag device after charging is determined according to the time unit for receiving the second signal, so that the ending time or the starting time of the time unit occupied by the first signal can be used as the ending time of charging completion of the tag device, and the charging time required by the tag device can be determined.

For example, the receiving device receives the second signal from the time unit m, and thus the receiving device may determine that one first signal corresponding to the second signal is sent by the sending device in the time unit m-k, and if the starting time unit that the sending device sends the N first signals is the time unit h, the receiving device may determine a time duration between the starting time of the time unit h and the ending time of the time unit m-k as the charging time required by the tag device.

Of course, the above is only an example, and there may be other implementation manners as well, for example, when the sending device sends the third signal, the sending time of the first third signal sent by the sending device may also be used as the starting time of the charging of the tag device; alternatively, the starting time of charging the tag device may also be a predefined time, or a time configured by the transmitting device or the receiving device, etc.

Correspondingly, there may also be other implementation manners at the end time of charging the tag device, for example, when the sending device sends the third signal, the sending time of the last third signal before the first signal corresponding to the second signal may also be used as the end time of completing charging the tag device, and other cases are not described again.

In another possible implementation, when the charging time required by the tag device is indirectly indicated by the indication of the second signal, the indication of the second signal may be a signal index value of the first signal, or a receiving time of the first signal, or a signal index value of a last third signal before the first signal, and the like. When the indication of the second signal indirectly indicates the charging time of the tag device, the receiving device may not need to determine the charging time of the tag device, and at this time, the transmitting device needs to determine the charging time required by the tag device according to the indication of the second signal. How the sending device determines the charging time specifically may refer to the description in the method for determining the charging time by the receiving device, and details are not repeated here.

Correspondingly, after the sending device determines the charging time of the tag device according to the indication of the second signal and before the next communication with the tag device, the sending device can send the first signal or the third signal with the corresponding duration according to the charging time to charge the tag device, so that the communication efficiency between the sending device and the tag device can be improved, and the situation that the tag device waits for a long time to complete charging due to the fact that the charging time of the tag device is not determined is avoided.

In the foregoing embodiment, after the tag device completes charging, the transmitting device notifies whether the transmitting device completes charging through the indication of the second signal or through the indication of the charging time required by the tag device. In another possible implementation, after the tag device completes charging, it may also directly indicate to the receiving device which first signal is received, as will be described in detail below.

Fig. 6 is a schematic flow chart of a signal transmission method according to an embodiment of the present application. In the flow shown in fig. 6, an execution main body for sending the first signal is taken as a sending device, an execution main body for sending the second signal is taken as a tag device, and an execution main body for sending the indication of the second signal is taken as a receiving device for example to describe, and other cases may refer to the description here, and are not described again here.

Referring to fig. 6, the method includes:

step 601: the transmitting device transmits the N first signals to the tag device.

Optionally, in this embodiment of the application, in a process that the sending device sends the N first signals, the sending device may further send at least one third signal to the tag device, where the third signal is dedicated to charging the tag device. For specific contents of the first signal and the third signal, and a relationship between the third signal and the first signal, etc., reference may be made to corresponding descriptions in the flow illustrated in fig. 2, which are not repeated herein.

Step 602: the tag device receives a first signal from the transmitting device.

Step 603: the tag device sends an indication of the first signal to a receiving device.

The indication of the first signal is to indicate a first signal received by the tag device among the N first signals. It should be noted that the first signal is a first signal received from the N first signals after the tag device completes charging. In practical applications, the first signal in the method may also be replaced by a second first signal, a first signal with received energy exceeding a threshold value, and the like according to requirements on charging accuracy or other aspects, and the embodiment of the present application is not limited.

The indication of the first signal may be a signal index value of the first signal, or may be time information of receiving the first signal, and the embodiment of the present application is not limited thereto. Wherein the signal index value of the first signal may be carried by the first signal itself.

Optionally, before the tag device sends the indication of the first signal to the receiving device, capability query information sent by the sending device may also be received, where the capability query information is used to request the indication of the first signal. And when the tag equipment receives the capability query information, the tag equipment sends an indication of the first signal to the receiving equipment.

Step 604: the receiving device receives an indication of the first signal from the tag device and sends a charge time indication to the transmitting device.

The charge time indication indicates a charge time required for the tag device.

Optionally, in this embodiment of the application, the charging time indication may directly indicate the charging time required by the tag device, for example, the charging time indication may be a specific value of the charging time, and a unit of the charging time indication may be a second, a millisecond, a time slot, a subframe, a frame, and the like, which is not limited in this embodiment of the application. In this case, the receiving device may determine the charging time through various methods.

In a first possible implementation manner, the receiving device may use, as a starting time of charging the tag device, a sending time of a first signal sent by a first sending device in the N first signals. And when the receiving equipment receives the indication of the first signal, the sending time of the indicated first signal is used as the finish time of the charging completion of the tag equipment. The receiving equipment determines the charging time required by the label equipment according to the time length from the starting time of charging of the label equipment to the finishing time of charging of the label equipment.

In a second possible implementation manner, when the sending device sends the third signal, the receiving device may use a sending time of the first third signal sent by the sending device as a starting time for charging the tag device. And when the receiving equipment receives the indication of the first signal, the sending time of the indicated first signal is used as the finish time of the charging completion of the tag equipment. Finally, the receiving device may determine a time period from a start time of charging the tag device to an end time of completing charging of the tag device as a charging time required by the tag device.

In a third possible implementation manner, the receiving device may use a transmission time of the first third signal transmitted by the transmitting device as a starting time for charging the tag device. And when the receiving equipment receives the indication of the first signal, taking the sending time of the last third signal before the indicated first signal as the finishing time of the charging of the tag equipment. The receiving device may determine a time period from a start time of charging the tag device to an end time of completing charging of the tag device as a charging time required by the tag device.

It should be noted that the starting time of charging the tag device may also be a predefined time, or a time when the receiving device is configured as the sending device, or a time when the sending device indicates the tag device and the receiving device, which is not limited in this embodiment of the application and is not described herein again. When the starting time is the time when the receiving device is configured as the sending device, the receiving device may also configure the starting time to the tag device through the sending device.

Optionally, in this embodiment of the application, the charging time indication may also indirectly indicate the charging time of the tag device, for example, the charging time indication may be a signal index value of the first signal, or a receiving time of the first signal, or a signal index value of a last third signal before the first signal, or the like. When the charging time indication indirectly indicates the charging time of the tag device, the receiving device may not need to determine the charging time of the tag device, and at this time, the transmitting device needs to determine the charging time required by the tag device according to the charging time indication. The method for determining the charging time of the tag device by the sending device may be the same as that of the receiving device, and is not described herein again.

Accordingly, the transmitting device may determine the charging time of the tag device based on the charging time indication. After the transmitting device determines the charging time of the tag device, before the next communication with the tag device, the transmitting device may transmit the first signal or the third signal of the corresponding duration according to the charging time to charge the tag device, so that the communication efficiency between the transmitting device and the tag device may be improved.

In another possible implementation, the transmitting device may also determine the charging time of the tag device in the following manner.

Step 701: the transmitting device transmits the N first signals to the tag device.

Optionally, in this embodiment of the application, in a process that the sending device sends the N first signals, the sending device may further send at least one third signal to the tag device, where the third signal is dedicated to charging the tag device. For specific contents of the first signal and the third signal, and a relationship between the third signal and the first signal, reference may be made to corresponding descriptions in the flow illustrated in fig. 2, which are not repeated herein.

Step 702: and the sending equipment sends ending indication information to the tag equipment, wherein the ending indication information is used for indicating that all the N first signals are sent completely.

Step 703: and after the tag device receives the first signal, starting a timer.

The initial value of the timer is 0. The first signal is a first signal received from the N first signals after the tag device is charged.

Step 704: and if the label equipment receives the ending indication information, closing the timer and determining the timing duration recorded by the timer.

The timing duration is the duration from receiving the first signal when the tag device is charged to receiving the end indication information.

Optionally, step 705: the sending equipment sends charging time query information to the tag equipment, and the charging time query information is used for requesting charging time required by the tag equipment.

Optionally, the tag device determines the charging time required by the tag device according to the timing duration.

Step 706: and the tag equipment sends the timing duration or the charging time required by the tag equipment to the receiving equipment.

The transmission in this step may also be replaced by an indication.

Optionally, when the sending device sends the charging time query information, the tag device may send the timing duration or the charging time required by the tag device after receiving the charging time query information.

Step 707: and the receiving equipment sends the timing duration or the charging time required by the label equipment to the sending equipment.

The transmission in this step may also be replaced by an indication.

And when the tag equipment sends the timing duration to the receiving equipment, the receiving equipment sends the timing duration or the charging time required by the tag equipment to the sending equipment. At this time, the charging time required by the tag device is determined by the receiving device according to the timing duration.

When the tag device transmits the charging time required by the tag device to the receiving device, the receiving device transmits the charging time required by the tag device to the transmitting device.

When the tag device sends the timing duration to the receiving device and the receiving device sends the charging time required by the tag device to the sending device, the receiving device may determine the charging time according to the timing duration. For example, the receiving device may determine a total time length between a starting time of charging the tag device and a sending time of the end indication information, and determine a difference obtained by subtracting the timing time length from the total time length as the charging time. The determination method may also be applied to a tag device to determine its required charging time.

The starting time of charging the tag device may be a sending time of a first signal sent by a first of the N first signals, or a sending time of a third signal sent by the first signal, or may also be a predefined time, or a time configured by the receiving device, which is not limited in this embodiment of the application.

Step 708: and the sending equipment receives the timing duration and determines the charging time required by the label equipment according to the timing duration.

Alternatively, the transmitting device receives the charging time required for the tag device.

The method for determining the charging time required by the tag device by the sending device according to the timing length may be the same as the method for determining the charging time by the receiving device according to the timing length, and is not described herein again.

Further, optionally, in step 706, the tag device may also send a signal index value of the first signal that is first received by the tag device after the charging is completed, or a receiving time of the first signal. In practical applications, the first signal in the method may also be replaced by a second first signal, a first signal with received energy exceeding a threshold value, and the like according to requirements on charging accuracy or other aspects, and the embodiment of the present application is not limited.

At this time, in step 707, the receiving device may also determine the charging time of the tag device according to the signal index value of the first signal or the receiving time of the first signal. Specifically, how to determine, reference may be made to a method for determining, by the receiving device, the charging time of the tag device in the flow shown in fig. 2, which is not described herein again.

Accordingly, in step 708, the transmitting device may also determine the charging time of the tag device according to the signal index value of the first signal or the receiving time of the first signal. Specifically, how to determine, reference may be made to a method for determining, by the receiving device, the charging time of the tag device in the flow shown in fig. 2, which is not described herein again.

Further, optionally, in step 706, the tag device may also send a signal index value of a last third signal before the first received first signal after the tag device completes charging, or a reception time of the third signal. In practical applications, the first signal in the method may also be replaced by a second first signal, a first signal with received energy exceeding a threshold value, and the like according to requirements on charging accuracy or other aspects, and the embodiment of the present application is not limited.

At this time, in step 707, the receiving device may also determine the charging time of the tag device according to the signal index value of the third signal or the receiving time of the third signal. Specifically, how to determine, reference may be made to a method for determining, by the receiving device, the charging time of the tag device in the flow shown in fig. 2, which is not described herein again.

Accordingly, in step 708, the transmitting device may also determine the charging time of the tag device according to the signal index value of the third signal or the receiving time of the third signal. Specifically, how to determine, reference may be made to a method for determining, by the receiving device, the charging time of the tag device in the flow shown in fig. 2, which is not described herein again.

In the embodiments provided in the present application, the methods provided in the embodiments of the present application are introduced from the perspective of interaction among the sending device, the tag device, and the receiving device, respectively. In order to implement the functions in the method provided by the embodiment of the present application, the sending device, the tag device, and the receiving device may include a hardware structure and/or a software module, and the functions are implemented in the form of a hardware structure, a software module, or a hardware structure and a software module. Whether any of the above-described functions is implemented as a hardware structure, a software module, or a hardware structure plus a software module depends upon the particular application and design constraints imposed on the technical solution.

Similar to the above concept, as shown in fig. 8, an apparatus 800 is further provided in the present embodiment to implement the functions of the sending device or the tag device or the receiving device in the above method. The device may be a software module or a system-on-a-chip, for example. In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices. The apparatus 800 may include: a processing module 801 and a communication module 802.

The division of the modules in the embodiment of the present application is schematic, and is only a logic function division, and there may be another division manner in actual implementation. In addition, functional modules in the embodiments of the present application may be integrated into one processor, may exist alone physically, or two or more modules are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode.

Illustratively, when the apparatus 800 implements the function of the transmitting device in the flow shown in fig. 2, the communication module 802 is configured to transmit N first signals to the tag device; wherein N is a positive integer; receiving an indication of a second signal from a receiving device, the second signal being a signal transmitted by the tag device to the receiving device, the second signal corresponding to one of the first signals, the N first signals including the one of the first signals to which the second signal corresponds.

A processing module 801, configured to determine a charging time of the tag device according to the indication of the second signal.

Other methods executed by the processing module 801 and the communication module 802 may refer to descriptions in the method flow shown in fig. 2, and are not described herein again.

Illustratively, when the apparatus 800 implements the functionality of the tag device in the process illustrated in fig. 2, the communication module 802 is configured to receive a first signal from a transmitting device.

A processing module 801, configured to determine a second signal according to the first signal, where the second signal corresponds to the first signal.

A communication module 802, configured to send the second signal to a receiving device.

Illustratively, when the apparatus 800 implements the function of the receiving device in the flow shown in fig. 2, the communication module 802 is configured to receive a second signal from the tag device.

A processing module 801, configured to determine an indication of a second signal, where the second signal corresponds to a first signal, and the first signal is a first signal sent by the sending device to the tag device.

A communication module 802 configured to send an indication of the second signal to a sending device.

The apparatus 800 may also implement the functions of the sending device, the tag device, and the receiving device in the flows shown in fig. 6 or fig. 7, which may specifically refer to the descriptions in the method flows shown in fig. 6 or fig. 7, and are not described herein again.

As shown in fig. 9, which is a device 900 provided in the embodiment of the present application, the device shown in fig. 9 may be implemented as a hardware circuit of the device shown in fig. 8. The communication apparatus may be adapted to the flowcharts shown in fig. 2 to 7, and perform the functions of the transmitting device or the tag device or the receiving device in the above method embodiments. For convenience of explanation, fig. 9 shows only the main components of the communication apparatus.

The apparatus 900 shown in fig. 9 includes at least one processor 920, configured to implement the functions of the transmitting device or the tag device or the receiving device in the method provided in the embodiment of the present application.

The apparatus 900 may also include at least one memory 930 for storing program instructions and/or data. A memory 930 is coupled to the processor 920. The coupling in the embodiments of the present application is an indirect coupling or a communication connection between devices, units or modules, and may be an electrical, mechanical or other form for information interaction between the devices, units or modules. The processor 920 may operate in conjunction with the memory 930. Processor 920 may execute program instructions stored in memory 930. At least one of the at least one memory may be included in the processor.

Apparatus 900 may also include a communication interface 910 for communicating with other devices over a transmission medium such that the apparatus used in apparatus 900 may communicate with other devices. In embodiments of the present application, the communication interface may be a transceiver, circuit, bus, module, or other type of communication interface. In the embodiments of the present application, the transceiver may be a stand-alone receiver, a stand-alone transmitter, a transceiver with integrated transceiving function, or an interface circuit. The processor 920 transmits and receives data using the communication interface 910, and is configured to implement the method performed by the transmitting device or the tag device or the receiving device in the embodiments corresponding to fig. 2 to 7.

Illustratively, when the apparatus 900 implements the function of the transmitting device in the flow shown in fig. 2, the communication interface 910 is configured to transmit N first signals to the tag device; wherein N is a positive integer; receiving an indication of a second signal from a receiving device, the second signal being a signal transmitted by the tag device to the receiving device, the second signal corresponding to one of the first signals, the N first signals including the one of the first signals to which the second signal corresponds.

A processor 920 configured to determine a charging time of the tag device according to the indication of the second signal.

Other methods performed by the processor 920 and the communication interface 910 may refer to the description in the method flow shown in fig. 2, and are not described here again.

Illustratively, when the apparatus 900 implements the functionality of the tag device in the process illustrated in fig. 2, the communication interface 910 is configured to receive a first signal from a transmitting device.

A processor 920 configured to determine a second signal according to the first signal, where the second signal corresponds to the first signal.

A communication interface 910, configured to send the second signal to a receiving device.

Illustratively, when the apparatus 900 implements the functionality of the receiving device in the process shown in fig. 2, the communication interface 910 is configured to receive a second signal from the tag device.

A processor 920 configured to determine an indication of a second signal, the second signal corresponding to a first signal, the first signal being a first signal transmitted by the transmitting device to the tag device.

A communication interface 910 for sending an indication of the second signal to a sending device.

For example, the apparatus 900 may also implement the functions of the sending device, the tag device, and the receiving device in the flows shown in fig. 6 or fig. 7, which may specifically refer to the descriptions in the method flows shown in fig. 6 or fig. 7, and are not described again here.

The specific connection medium among the communication interface 910, the processor 920 and the memory 930 is not limited in the embodiments of the present application. In the embodiment of the present application, the memory 930, the processor 920, and the communication interface 910 are connected by a bus 940 in fig. 9, the bus is represented by a thick line in fig. 9, and the connection manner between other components is merely illustrative and is not limited thereto. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 9, but this does not indicate only one bus or one type of bus.

It should be noted that, in the embodiments of the present application, the processor may be a general processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component, and may implement or execute the methods, steps, and logic blocks disclosed in the embodiments of the present application. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor.

In the embodiment of the present application, the memory may be a nonvolatile memory, such as a Hard Disk Drive (HDD) or a solid-state drive (SSD), and may also be a volatile memory, for example, a random-access memory (RAM). The memory is any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited to such. The memory in the embodiments of the present application may also be circuitry or any other device capable of performing a storage function for storing program instructions and/or data.

The method provided by the embodiment of the present application may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus. The computer instructions may be stored on a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., an SSD), among others.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

In the embodiments of the present application, the embodiments may refer to each other, for example, methods and/or terms between the embodiments of the method may refer to each other, for example, functions and/or terms between the embodiments of the apparatus and the embodiments of the method may refer to each other, without logical contradiction.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A signal transmission method, comprising:

the method comprises the steps that a sending device sends N first signals to a tag device, wherein N is a positive integer;

the transmitting device receiving an indication of a second signal from a receiving device, the indication of the second signal directly or indirectly indicating a charging time required by the tag device, the second signal being a signal transmitted by the tag device to the receiving device, the second signal corresponding to one first signal, the N first signals including the one first signal to which the second signal corresponds; the first signal corresponding to the second signal is received after the tag device is charged;

and the sending equipment determines the charging time of the label equipment according to the corresponding relation between the second signal and the first signal.

2. The method of claim 1, further comprising:

and the sending equipment sends configuration information to the tag equipment, wherein the configuration information is used for indicating the corresponding relation between the N first signals and the M second signals, and M is a positive integer.

3. The method of claim 2, wherein the configuration information is used to indicate a correspondence relationship between the N first signals and the M second signals, and comprises:

4. A method according to any of claims 1-3, wherein the second signal corresponds to a first signal comprising:

the one first signal is a signal transmitted over time unit n and the second signal is a signal transmitted over time unit n + k, where n is an integer and k is an integer greater than or equal to 0.

5. The method of claim 4, wherein the value of k is a preconfigured value or a value signaled to the tag device.

6. A method according to any one of claims 1 to 3, wherein the first signal is a reference signal or a synchronization signal.

7. A method according to any one of claims 1 to 3, wherein the second signal is a random access preamble.

8. A signal transmission method, comprising:

the tag device receives a first signal from the transmitting device; the first signal is received after the tag device finishes charging;

the tag device determines a second signal according to the first signal, wherein the second signal corresponds to the first signal; the corresponding relation between the second signal and the first signal is used for determining the charging time required by the label equipment;

and the tag device sends the second signal to a receiving device.

9. The method of claim 8, further comprising:

the tag device receives configuration information from the transmitting device, where the configuration information is used to indicate a correspondence relationship between N first signals and M second signals, where N, M is a positive integer, the N first signals include the first signals, and the M second signals include the second signals.

10. The method of claim 9, wherein the configuration information is used to indicate a correspondence relationship between N first signals and M second signals, and comprises:

11. The method of any of claims 9-10, wherein the second signal corresponds to the first signal, comprising:

the first signal is a signal transmitted over a time unit n and the second signal is a signal transmitted over a time unit n + k, where n is an integer and k is an integer greater than or equal to 0.

12. The method of claim 11, wherein the value of k is a preconfigured value or a value signaled to the tag device.

13. The method according to any of claims 9 to 10, wherein the first signal is a reference signal or a synchronization signal.

14. The method of any of claims 9 to 10, wherein the second signal is a random access preamble.

15. A signal transmission method, comprising:

the receiving device receives a second signal from the tag device;

the receiving device sends an indication of the second signal to a sending device, the indication of the second signal directly or indirectly indicates the charging time required by the tag device, the second signal corresponds to a first signal, the first signal is the first signal sent by the sending device to the tag device, and the correspondence between the second signal and the first signal is used for determining the charging time required by the tag device; and the first signal corresponding to the second signal is received after the tag equipment is charged.

16. The method of claim 15, wherein the first signal is a reference signal or a synchronization signal.

17. The method of claim 15 or 16, wherein the second signal is a random access preamble.

18. A signal transmission arrangement for carrying out the method according to any one of claims 1 to 7.

19. A communications device comprising a processor and a memory, the memory coupled to the processor, the processor configured to perform the method of any of claims 1 to 7.

20. A signal transmission arrangement for carrying out the method according to any one of claims 8 to 14.

21. A communications device comprising a processor and a memory, the memory coupled to the processor, the processor configured to perform the method of any of claims 8 to 14.

22. A signal transmission arrangement for carrying out the method according to any one of claims 15 to 17.

23. A communications device comprising a processor and a memory, the memory coupled to the processor, the processor configured to perform the method of any of claims 15 to 17.

24. A communication system comprising the signal transmission apparatus of claim 18 or the communication apparatus of claim 19, the signal transmission apparatus of claim 20 or the communication apparatus of claim 21, and the signal transmission apparatus of claim 22 or the communication apparatus of claim 23.

25. A computer-readable storage medium, characterized by comprising a program or instructions, which when executed by a computer, performs the method of any one of claims 1 to 17.