Communication method and apparatus

Abstract

A communication method and apparatus. The method comprises: receiving first information from a first apparatus, the first information being used for indicating a first threshold value and a first transmission power, or the first information being used for indicating a second threshold value, the second threshold value being determined on the basis of the first threshold value and the first transmission power, wherein the first threshold value is a minimum signal strength that can be measured by the first apparatus, and the first transmission power is a transmission power used by the first apparatus to send a signal to an Internet of Things (IoT) device; and on the basis of a first signal strength, a second signal strength, a first loss, and the first information, determining whether to send second information to the first apparatus. The method is applicable to a scenario in which a first apparatus and a second apparatus are co-located or non-co-located, and an IoT device can accurately determine whether to send second information.

Description

Communication method and apparatus

[0001] Cross-reference to related applications

[0002] This application claims priority to the Chinese Patent Application No. 202410841562.2, filed on June 26, 2024, and entitled “A communication method and apparatus”, the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the field of communication, and in particular, to a communication method and apparatus. BACKGROUND

[0004] With the increasing application of machine-type communication (MTC) and internet of things (IoT) communication, the number of IoT devices is growing day by day. Therefore, the industry is increasingly demanding the reduction of the cost and power consumption of IoT devices. Given the advantage of radio frequency identification (RFID) communication technology in low power consumption, ambient IoT (AIoT) has emerged.

[0005] Since IoT devices or AIoT devices may not have the ability to generate signals independently, and the signals sent by IoT devices or AIoT devices need to be detected by a reader, a source capable of providing a carrier wave (CW) or carrying a carrier wave is needed to provide a carrier for IoT devices or AIoT devices to carry their to-be-sent signals. This source can be referred to as an activator or a CW source / node.

[0006] The reader and the activator can be co-located or non-co-located. How IoT devices or AIoT devices judge whether the signal strength from the activator can bear the path loss of the IoT devices sending uplink signals to the reader, thereby reducing the missed transmission, multiple transmission or mis-transmission of the physical device-to-reader channel (PDRCH) from the device to the reader, becomes a technical problem to be solved. SUMMARY

[0007] Embodiments of the present application provide a communication method and apparatus to enable IoT devices or AIoT devices to accurately judge whether the signal strength from the activator can bear the path loss of the IoT devices sending uplink signals to the reader, thereby reducing the missed transmission, multiple transmission or mis-transmission of the PDRCH.

[0008] In a first aspect, a method for communication is provided. The method can be performed by an IoT device or a chip in the IoT device. The method comprises: receiving first information from a first apparatus, the first information being used to indicate a first threshold value and a first transmission power, or the first information being used to indicate a second threshold value determined according to the first threshold value and the first transmission power; wherein the first threshold value is a minimum signal strength that can be detected by the first apparatus, and the first transmission power is a transmission power used by the first apparatus to transmit a signal to an IoT device; determining whether to transmit second information to the first apparatus according to a first signal strength, a second signal strength, a first loss and the first information; wherein the first signal strength is a signal strength of a signal from the first apparatus detected by the IoT device; the second signal strength is a signal strength of a signal from a second apparatus detected by the IoT device; and the first loss is a backscattering loss of the IoT device.

[0009] The above method can be applied to a scenario where the first apparatus and the second apparatus are co-sited or non-co-sited, and the IoT device can accurately determine whether to transmit the second information, i.e., determine whether the signal strength of the signal from the second apparatus can bear the loss of the IoT device transmitting an uplink signal to the first apparatus, thereby improving the success rate of the first apparatus detecting the second information and reducing the occurrence of missed transmission, multiple transmission or false transmission of PDRCH.

[0010] In a possible design, the second threshold value is a sum of the first threshold value and the first transmission power.

[0011] In a possible design, the first information is used to indicate the first threshold value and the first transmission power; and when determining whether to transmit the second information to the first apparatus according to the first signal strength, the second signal strength, the first loss and the first information, if P L -(P t -P1)≥P s , the second information is transmitted to the first apparatus; and if P L -(P t -P1)<P s , it is determined that the second information is not transmitted to the first apparatus; wherein P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, and P s represents the first threshold value, and P t represents the first transmission power.

[0012] In a possible design, the first information is used to indicate the second threshold value; and when determining whether to transmit the second information to the first apparatus according to the first signal strength, the second signal strength, the first loss and the first information, if P L -(P t -P1)≥P s , the second information is transmitted to the first apparatus; and if P L -(P t -P1)<P s , it is determined that the second information is not transmitted to the first apparatus; wherein P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, and P s represents the second threshold value.L + P2≥ P k , sending the second information to the first apparatus; if P1+ P L + P2< P k , determining not to send the second information to the first apparatus; wherein P1represents the first signal strength, P L represents the first loss, P2represents the second signal strength, P k represents the second threshold value.

[0013] In one possible design, the IoT device does not have energy amplification capability.

[0014] In one possible design, the IoT device has energy amplification capability; in determining whether to send the second information to the first apparatus based on the first signal strength, the second signal strength, the first loss, and the first information, whether to send the second information to the first apparatus is determined based on the first signal strength, the second signal strength, the first loss, the first information, and an energy amplification value of the IoT device.

[0015] With the above design, how an IoT device with specific energy amplification capability determines whether to send the second information is considered.

[0016] In one possible design, the energy amplification value of the IoT device is an energy amplification parameter of the IoT device.

[0017] In one possible design, the energy amplification value of the IoT device is determined based on an energy amplification parameter of the IoT device, and an energy storage efficiency of the IoT device and a feedback time slot selected by the IoT device.

[0018] In one possible design, the first information is used to indicate the first threshold value and the first transmission power; in determining whether to send the second information to the first apparatus based on the first signal strength, the second signal strength, the first loss, the first information, and an energy amplification parameter of the IoT device, if P2+ P L + P a - (P t - P1) ≥ P s , the second information is sent to the first apparatus; if P2+ P L + P a - (P t - P1) < P s , it is determined not to send the second information to the first apparatus; wherein P1represents the first signal strength, P L represents the first loss, P2represents the second signal strength, P s represents the first threshold value, P t represents the first transmission power, P aan energy amplification value of the IoT device.

[0019] In a possible design, the first information is used to indicate the second threshold value; when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and an energy amplification parameter of the IoT device, if P1+P L +P a +P2≥P k , the second information is sent to the first device; if P1+P L +P a +P2 k , it is determined that the second information is not sent to the first device; where P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P k represents the second threshold value, and P a is an energy amplification value of the IoT device.

[0020] In a possible design, third information is received, the third information being used to indicate whether the first device and the second device are co-sited; when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information, if the third information is used to indicate that the first device and the second device are not co-sited, whether to send the second information to the first device is determined according to the first signal strength, the second signal strength, the first loss, and the first information.

[0021] With the above design, the first device can indicate, for the IoT device, whether the first device and the second device are co-sited, so that the IoT device selects a proper scheme to determine whether to send the second information.

[0022] In a possible design, fourth information from the first device is received, the fourth information being used to indicate a third threshold value; where the third threshold value is determined according to the first transmission power, a signal strength of a signal from the IoT device detected by the first device, and a type-related parameter of the IoT device; if the third information is used to indicate that the first device and the second device are co-sited, whether to send the second information to the first device is determined according to the first signal strength and the fourth information.

[0023] With the above design, the first device can indicate, for the IoT device, whether the first device and the second device are co-sited, so that the IoT device selects a proper scheme to determine whether to send the second information.

[0024] In a second aspect, the present application provides a communication method, which can be performed by a first device or a chip in the first device. For example, the first device is a reader / writer. The method comprises: sending first information, which is used to indicate a first threshold value and a first transmission power, or which is used to indicate a second threshold value determined according to the first threshold value and the first transmission power; wherein the first threshold value indicates a minimum signal strength that can be detected by the first device, and the first transmission power is a transmission power used by the first device to send a signal to an IoT device.

[0025] In a possible design, the second threshold value is a sum of the first threshold value and the first transmission power.

[0026] In a possible design, third information is sent, which is used to indicate whether the first device and a second device are co-located.

[0027] In a third aspect, the present application provides a communication method, which can be performed by an IoT device or a chip in the IoT device. The method comprises: receiving fourth information from a first device, the fourth information comprising a third threshold value determined according to a first transmission power, a signal strength of a signal from the IoT device detected by the first device, and a type-related parameter of the IoT device; the first transmission power is a transmission power used by the first device to send a signal to the IoT device; determining whether to send second information to the first device according to the first signal strength, a second signal strength, and the third threshold value; wherein the first signal strength is a signal strength of a signal from the first device detected by the IoT device; and the second signal strength is a signal strength of a signal from a second device detected by the IoT device.

[0028] The above method can be applied to scenarios where the first device and the second device are co-located or not co-located. Compared with comparing only the first signal strength with the third threshold value, the above method further compares the second signal strength with the first signal strength, so that the IoT device can accurately determine whether to send the second information, i.e., determine whether the signal strength of the signal from the second device can bear the uplink signal loss of the IoT device sending the uplink signal to the first device, thereby improving the success rate of the first device detecting the second information, and reducing the occurrence of missed transmission, multiple transmission, or false transmission of PDRCH.

[0029] In a possible design, when determining whether to send the second information according to the first signal strength, the second signal strength, and the third threshold value, if the first signal strength is greater than or equal to the third threshold value, and the second signal strength is greater than or equal to the first signal strength, the second information is sent to the first device; if the first signal strength is less than the third threshold value, or the second signal strength is less than the first signal strength, it is determined that the second information is not sent to the first device.

[0030] Fourthly, this application provides a communication device, comprising: a transceiver unit and a processing unit, wherein the transceiver unit is configured to receive first information from a first device, the first information indicating a first threshold value and a first transmission power, or the first information indicating a second threshold value, the second threshold value being determined based on the first threshold value and the first transmission power; wherein the first threshold value is the minimum signal strength that the first device can detect, and the first transmission power is the transmission power used by the first device to transmit signals to an Internet of Things (IoT) device; the processing unit is configured to determine whether to transmit second information to the first device based on the first signal strength, the second signal strength, a first loss, and the first information; wherein the first signal strength is the signal strength of the signal detected by the IoT device from the first device; the second signal strength is the signal strength of the signal detected by the IoT device from a second device; and the first loss is the backscattering loss of the IoT device.

[0031] In one possible design, the second threshold value is the sum of the first threshold value and the first transmission power.

[0032] In one possible design, the first information is used to indicate the first threshold value and the first transmission power; the processing unit is configured to, when determining whether to send second information to the first device based on the first signal strength, the second signal strength, the first loss, and the first information, if P2+P L -(P t -P1)≥P s Send the second information to the first device; if P2+P L -(P t -P1)<P s It is determined that the second information will not be sent to the first device; where P1 represents the first signal strength, P L P represents the first loss, P2 represents the second signal strength, and P... s This represents the first threshold value, P. t This indicates the first transmission power.

[0033] In one possible design, the first information is used to indicate the second threshold value; the processing unit is configured to, when determining whether to send the second information to the first device based on the first signal strength, the second signal strength, the first loss, and the first information, if P1+P L +P2≥P k Send the second information to the first device; if P1+P L +P2<P k It is determined that the second information will not be sent to the first device; where P1 represents the first signal strength, P LP2+P1 represents the first threshold value, and P2+P1+P represents the first sending power. k P2+P1 represents the first threshold value, and P2+P1+P represents the first sending power.

[0034] In a possible design, the IoT device does not have the energy amplification capability.

[0035] In a possible design, the IoT device has the energy amplification capability; the processing unit is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and the energy amplification value of the IoT device, when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information.

[0036] In a possible design, the energy amplification value of the IoT device is determined according to the energy amplification parameter of the IoT device, and the energy storage efficiency of the IoT device and the feedback time slot selected by the IoT device.

[0037] In a possible design, the first information is used to indicate the first threshold value and the first sending power; the processing unit is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and the energy amplification parameter of the IoT device, when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information. L +P a -(P t -P1)≥P s , the second information is sent to the first device; if P2+P L +P a -(P t -P1)<P s , it is determined that the second information is not sent to the first device; wherein P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P s represents the first threshold value, P t represents the first sending power, and P a is the energy amplification value of the IoT device.

[0038] In a possible design, the first information is used to indicate the second threshold value; the processing unit is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and the energy amplification parameter of the IoT device, when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information. L +P a +P2≥P k , the second information is sent to the first device; if P1+P L +P a +P2<Pk determining not to send the second information to the first device; wherein P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P k represents the second threshold value, P a is an energy amplification value of the IoT device.

[0039] In one possible design, the transceiving unit is configured to receive third information, the third information being used to indicate whether the first device and the second device are co-located; and the processing unit is configured to, when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information, determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information if the third information is used to indicate that the first device and the second device are not co-located.

[0040] In one possible design, the transceiving unit is configured to receive fourth information from the first device, the fourth information being used to indicate a third threshold value; wherein the third threshold value is determined according to the first transmission power, a signal strength of a signal from the IoT device detected by the first device, and a type-related parameter of the IoT device; and the processing unit is configured to, when determining whether to send the second information to the first device according to the first signal strength and the fourth information, determine whether to send the second information to the first device according to the first signal strength and the fourth information if the third information is used to indicate that the first device and the second device are co-located.

[0041] In a fifth aspect, a communication apparatus is provided, which comprises a transceiving unit and a processing unit, wherein the processing unit is configured to invoke the transceiving unit to perform: sending first information, the first information being used to indicate a first threshold value and a first transmission power, or the first information being used to indicate a second threshold value, the second threshold value being determined according to the first threshold value and the first transmission power; wherein the first threshold value indicates a minimum signal strength that can be detected by the first device, and the first transmission power is a transmission power used by the first device to send a signal to an IoT device.

[0042] In one possible design, the second threshold value is a sum of the first threshold value and the first transmission power.

[0043] In one possible design, the transceiving unit is configured to send third information, the third information being used to indicate whether the first device and the second device are co-located.

[0044] In a sixth aspect, the present application provides a communication apparatus, comprising: a transceiver and a processing unit, wherein the transceiver is configured to receive fourth information from a first apparatus, the fourth information comprising a third threshold value determined according to a first transmission power, a signal strength of a signal from a first apparatus detected by an IoT device, and a type-related parameter of the IoT device; the first transmission power is a transmission power used by the first apparatus to transmit a signal to the IoT device; the processing unit is configured to determine whether to transmit second information to the first apparatus according to the first signal strength, a second signal strength, and the third threshold value; wherein the first signal strength is a signal strength of a signal from the first apparatus detected by the IoT device; the second signal strength is a signal strength of a signal from a second apparatus detected by the IoT device.

[0045] In a possible design, when determining whether to transmit the second information according to the first signal strength, the second signal strength, and the third threshold value, the processing unit is configured to transmit the second information to the first apparatus if the first signal strength is greater than or equal to the third threshold value, and the second signal strength is greater than or equal to the first signal strength; and determine not to transmit the second information to the first apparatus if the first signal strength is less than the third threshold value, or the second signal strength is less than the first signal strength.

[0046] In a seventh aspect, the present application provides a communication device, comprising at least one processing element, wherein at least one storage element is configured to store programs and data, and the at least one processing element is configured to read and execute the programs and data stored in the storage element, so that the method in any of the aspects of the present application is implemented.

[0047] In a possible design, the communication device further comprises the at least one storage element.

[0048] In an eighth aspect, the present application provides a communication apparatus, comprising: at least one processor; and the at least one processor is configured to enable the communication apparatus to implement the method in any of the aspects of the present application.

[0049] In a possible design, the communication apparatus comprises an interface circuit configured to provide input and / or output of programs or instructions for the at least one processor; and the at least one processor is configured to execute the programs or instructions to enable the communication apparatus to implement the method in any of the aspects of the present application.

[0050] In a possible design, the communication apparatus comprises the at least one memory configured to store the programs or instructions.

[0051] The communication apparatus in the fourth aspect to the eighth aspect can be the first apparatus or the second apparatus, or a module or unit (for example, a chip, or a chip system, or a circuit) in the first apparatus corresponding to the method / operation / step / action described in any one of the first aspect or the third aspect, or a module or unit (for example, a chip, or a chip system, or a circuit) in the second apparatus corresponding to the method / operation / step / action described in any one of the second aspect, or an apparatus that can be used with the first apparatus or the second apparatus.

[0052] In a ninth aspect, the present application provides a computer storage medium, which stores a software program, and the software program, when read and executed by one or more processors, can implement the method described in any one of the aspects.

[0053] In a tenth aspect, the present application also provides a computer program, which, when running on a computer, causes the computer to perform the method described in any one of the aspects.

[0054] In an eleventh aspect, the present application provides a computer program product containing instructions, which, when running on a computer, causes the computer to perform the method described in any one of the aspects.

[0055] In a twelfth aspect, the present application provides a chip system, which includes at least one chip and a memory, and the at least one chip is configured to read and execute a program stored in the memory to implement the method described in any one of the aspects.

[0056] On the basis of the implementation provided in the aspects, the present application can be further combined to provide more implementations. BRIEF DESCRIPTION OF DRAWINGS

[0057] FIG. 1 is a schematic diagram of an architecture of a wireless communication system;

[0058] FIG. 2 is a schematic diagram of an architecture of a backscatter communication system;

[0059] FIGS. 3A to 3D are schematic diagrams of topological relationships of a backscatter communication system, respectively;

[0060] FIG. 4A is a schematic diagram of signaling interaction between an IoT device and a reader in a random access procedure;

[0061] FIG. 4B is a schematic diagram for a scenario in which only one IoT device transmits a random number in one time slot;

[0062] FIG. 4C is a schematic diagram for a scenario in which multiple IoT devices transmit random numbers in one time slot;

[0063] FIG. 5 is a signaling structure diagram;

[0064] FIG. 6A is a diagram of a scenario 1 co-sited reader and excitation source;

[0065] FIG. 6B is a diagram of a scenario 2 non-co-sited reader and excitation source;

[0066] FIG. 7 is a flow diagram of a communication method according to an embodiment of the present application;

[0067] FIG. 8 is a flow diagram of another communication method according to an embodiment of the present application;

[0068] FIG. 9 is a flow diagram of yet another communication method according to an embodiment of the present application;

[0069] FIG. 10 is a structure diagram of a communication apparatus according to an embodiment of the present application;

[0070] FIG. 11 is a structure diagram of another communication apparatus according to an embodiment of the present application. DETAILED DESCRIPTION

[0071] The specific implementation manners of the present application will be described below in conjunction with the drawings in the embodiments of the present application. However, the implementation manners of the present application can also include combinations of these embodiments without departing from the spirit or scope of the present application, such as using other embodiments and making structural changes. Therefore, the detailed description of the following embodiments should not be interpreted in a limiting sense. The terms used in the embodiment part of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application.

[0072] The embodiments of the present application can be applied to various communication systems, such as a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a worldwide interoperability for microwave access (WIMAX) communication system, a 5G system or a new radio (NR), or a future communication system or other similar communication system, or an ultra wide band (UWB) system, or a wireless fidelity (WiFi) system.

[0073] Figure 1 shows a possible, non-limiting, schematic illustration of a system. As shown in Figure 1, the communication system 1000 includes a wireless access network 100 and a core network 200, and optionally, the communication system 1000 can also include an Internet 300. The wireless access network 100 can include at least one wireless access network device (e.g., 110a and 110b in Figure 1) and at least one terminal (e.g., 120a-120j in Figure 1). The terminal is connected to the wireless access network device in a wireless manner, and the wireless access network device is connected to the core network in a wireless or wired manner. The core network device and the wireless access network device can be independent and different physical devices, or the functions of the core network device and the logical functions of the wireless access network device can be integrated on the same physical device, or a physical device can integrate the functions of part of the core network device and part of the wireless access network device. The terminals can be connected to each other in a wired or wireless manner, and the wireless access network devices can be connected to each other in a wired or wireless manner. Figure 1 is only a schematic diagram, and the communication system can also include other network devices, such as wireless relay devices and wireless backhaul devices, which are not shown in Figure 1.

[0074] The wireless access network device can be a base station, an evolved NodeB (eNodeB), a transmission reception point (TRP), a next generation NodeB (gNB) in a 5G mobile communication system, a base station in a future mobile communication system, or an access node in a WiFi system, etc. The wireless access network device can also be an open RAN (O-RAN or ORAN), or a cloud radio access network (CRAN). The wireless access network device can also be a communication system that integrates two or more of the above systems. The wireless access network device can be a macro base station (e.g., 110a in Figure 1), a micro base station or an indoor station (e.g., 110b in Figure 1), a relay node or a donor node, etc.

[0075] In addition, the wireless access network device can also be a module or unit that completes the function of the base station part, for example, can be a central unit (CU), a distributed unit (DU), a CU-control plane (CP), a CU-user plane (UP), or a radio unit (RU), etc. In different systems, the CU (or CU-CP and CU-UP), DU or RU can also have different names, but those skilled in the art can understand their meanings. For example, in the ORAN system, the CU can also be referred to as O-CU (open CU), the DU can also be referred to as O-DU, the CU-CP can also be referred to as O-CU-CP, the CU-UP can also be referred to as O-CU-UP, and the RU can also be referred to as O-RU. For the convenience of description, the CU, CU-CP, CU-UP, DU and RU are taken as examples for description in this application. Any one of the CU (or CU-CP, CU-UP), DU and RU in this application can be implemented by a software module, a hardware module, or a combination of a software module and a hardware module.

[0076] Embodiments of the present application do not limit the specific technology and specific device form adopted by the wireless access network device. For the convenience of description, the wireless access network device will be referred to as the access network device in the following description. It can be understood that the access network device can be referred to as a communication apparatus. For example, the access network device can be understood as an apparatus with access network device function. For example, the apparatus with access network device function can be an access network device; or part of the elements in the access network device, such as a CU, a DU, etc. It can also be an apparatus capable of supporting the access network device to implement the function, such as a chip system, a hardware circuit, a software module, or a hardware circuit plus a software module, which can be installed in the access network device or can be used with the access network device. In the embodiments of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0077] The terminal can also be referred to as a terminal device, a user equipment (UE), a mobile station, a mobile terminal, etc. The terminal can be widely applied to various scenarios, such as device-to-device (D2D), vehicle to everything (V2X) communication, MTC, IoT, virtual reality, augmented reality, industrial control, autonomous driving, remote medical treatment, smart power grid, smart furniture, smart office, smart wear, smart transportation, smart city, etc. The terminal can be a mobile phone, a tablet computer, a computer with wireless transceiver function, a wearable device, a vehicle, a drone, a helicopter, an airplane, a ship, a robot, a mechanical arm, a smart home device, etc.

[0078] Embodiments of the present application do not limit the specific technology and specific device form adopted by the terminal. It can be understood that the terminal can be referred to as a communication device. For example, the terminal can be understood as a device with terminal function. For example, the device with terminal function can be a terminal; or can be a device capable of supporting the terminal to implement the function, such as a chip system, a hardware circuit, a software module, or a hardware circuit plus a software module, which can be installed in the terminal or can be used in matching with the terminal.

[0079] It can be understood that the terminal in the present application can be a device with backscatter function, such as an IoT device or an environmental IoT device. In the present application, the IoT device and the environmental IoT device can be replaced with each other. For example, the IoT device can also be referred to as a tag, or an environmental IoT tag, or a terminal in an environmental IoT scenario, or a tag in an environmental IoT scenario. Alternatively, the IoT device can be a terminal supporting RFID technology.

[0080] As shown in FIG. 2, the backscatter-based communication system can include an excitation end 201, a sending end 202, and a receiving end 203.

[0081] In the communication system, the excitation end 201 can send an excitation signal, which can be a single-tone signal (i.e., a continuous sine wave) or a multi-tone signal (i.e., a signal with a certain bandwidth). The excitation signal can be a radio frequency signal. The excitation signal can or can not carry data to be sent to the receiving end 203. The excitation signal sent by the excitation end 201 is a signal known to the sending end 202.

[0082] After receiving the excitation signal, the sending end 202 can modulate the data to be sent onto the excitation signal, thereby obtaining a backscatter signal, and send the backscatter signal to the receiving end 203.

[0083] In embodiments of the present application, the excitation end can be a device, or a unit, a module or a chip (system) inside the device, and the sending end and the receiving end are the same. The external form of the excitation end, the sending end and the receiving end can be various, which are not limited in embodiments of the present application. For example, the excitation end 201 is an excitation source or a source / node for supplying a carrier wave. The sending end 202 can be an environmental IoT device or an IoT device. The receiving end 203 can be a reader / writer, an access network device, a terminal, etc.

[0084] For ease of description, the communication system shown in FIG. 2 is referred to as a backscatter communication system in the following embodiments of the present application. It should be noted that FIG. 2 is only an example. In a possible implementation, the excitation end and the receiving end can also be integrated into the same physical entity, which will not be described herein.

[0085] The following takes the application of the backscatter communication system to the environmental IoT scenario as an example to illustrate in detail the communication system to which the scheme provided by the embodiments of the present application is applicable.

[0086] FIG. 3A is a schematic diagram of the topology structure of a first communication system in the environmental IoT scenario according to an embodiment of the present application. As shown in FIG. 3A, the communication system can include an access network device and an environmental IoT device. For ease of description, the communication system shown in FIG. 3A is referred to as topology structure 1 in the embodiments of the present application. When the backscatter communication system is applied to the topology structure 1, the environmental IoT device in the topology structure 1 can act as a sending end, the access network device in the topology structure 1 can act as a receiving end, and the access network device shown in the topology structure 1 or a device not shown in the topology structure 1 that can provide an excitation signal for the environmental IoT device can act as an excitation end.

[0087] FIG. 3B is a schematic diagram of the topology structure of a second communication system in the environmental IoT scenario according to an embodiment of the present application. As shown in FIG. 3B, the communication system can include an access network device, an intermediate node, and an environmental IoT device. The intermediate node can be a relay, an IAB node, a terminal, a new terminal, a repeater, or a CPE, which is not specifically limited in the embodiments of the present application. The access network device and the intermediate node can communicate through a Uu interface. For ease of description, the communication system shown in FIG. 3B is referred to as topology structure 2 in the embodiments of the present application. When the backscatter communication system is applied to the topology structure 2, the environmental IoT device in the topology structure 2 can act as a sending end, the intermediate node in the topology structure 2 can act as a receiving end, a device not shown in the topology structure 2 that can provide an excitation signal for the environmental IoT device can act as an excitation end, or the intermediate node itself can act as an excitation end. The present application takes the intermediate node as an example, which can be replaced by a terminal.

[0088] FIG. 3C is a schematic diagram of a topology of a third communication system in an ambient IoT scenario according to an embodiment of the present application. As shown in the schematic diagram of FIG. 3C(a) or the schematic diagram of FIG. 3C(b), the communication system can include an access network device, an assisting node and an ambient IoT device. The assisting node can also be referred to as an intermediate node. The schematic diagram of FIG. 3C(a) shows an uplink communication scenario, and the schematic diagram of FIG. 3C(b) shows a downlink communication scenario. The access network device and the assisting node can communicate with each other through a Uu interface. For ease of description, the communication system shown in the schematic diagram of FIG. 3C(a) and the communication system shown in the schematic diagram of FIG. 3C(b) are referred to as topology 3 in the embodiments of the present application. When the backscatter communication system is applied to the topology 3, the ambient IoT device in the topology 3 can act as a transmitting end, the access network device in the topology 3 can act as a receiving end, other devices not shown in the topology 3 that can provide an excitation signal for the IoT device can act as an excitation end, or the intermediate node can act as the excitation end.

[0089] FIG. 3D is a schematic diagram of a topology of a fourth communication system in an ambient IoT scenario according to an embodiment of the present application. As shown in FIG. 3D, the communication system can include a terminal and an ambient IoT device. For ease of description, the communication system shown in FIG. 3D is referred to as topology 4 in the embodiments of the present application. When the backscatter communication system is applied to the topology 4, the ambient IoT device in the topology 4 can act as a transmitting end, the terminal in the topology 4 can act as a receiving end, a device not shown in the topology 4 that can provide an excitation signal for the IoT device can act as an excitation end, or the terminal can act as the excitation end.

[0090] In the topologies 1 to 4 described above, the direction of a link in each topology can be unidirectional or bidirectional, which is not specifically limited in the embodiments of the present application. The number of nodes (or devices) in each topology can be one or more. FIGs. 3A to 3D only show an example in which the number of each type of node in the corresponding topology is one, which does not limit the number of nodes in the topology.

[0091] In the above topology 1-topology 4, the excitation end can be located in the topology or not in the topology. The excitation end can be integrated with the receiving end, or can be non-integrated with the receiving end. When the excitation end is integrated with the receiving end, the excitation end and the receiving end can be the same node or come from the same node. When the excitation end is non-integrated with the receiving end, the excitation end and the receiving end can not be the same node or come from different nodes. When the excitation end is not in the topology, the excitation end can be very close to the environmental IoT device. For example, the receiving end is a reader / writer, and the excitation end is an excitation source. The excitation source and the reader / writer can be co-sited or co-noded, that is, the excitation source is integrated with the reader / writer, or the excitation source and the reader / writer can be non-co-sited or non-co-noded, that is, the excitation source is non-integrated with the reader / writer.

[0092] The reader / writer can be a handheld or fixed device for reading information of an IoT device. The reader / writer can be used for the IoT device to access the network. Optionally, the reader / writer can also be used to write information to the IoT device. In this application, the form of the reader / writer is not limited, which can be a base station, a terminal, a relay node, or an integrated access and backhaul (IAB) node. For example, when the reader / writer is a terminal, the communication between the reader / writer and the IoT device can be regarded as transmission between terminals. For another example, when the reader / writer is a base station, the communication between the reader / writer and the IoT device is a universal user to network interface (Uu) interface, that is, the reader / writer and the IoT device perform air interface communication. The IoT device can be located within the coverage range provided by the reader / writer.

[0093] The excitation source is a source capable of providing a carrier or carrying a carrier, which is used to provide a carrier for the IoT device or the environmental IoT device to carry the to-be-sent signal.

[0094] Depending on the storage capability, the environmental IoT device shown in the above topology 1-topology 4 can be divided into the following three categories:

[0095] The first type of device: can or cannot store energy (or store), and has no independent signal generation and amplification function when performing backscattering transmission. This type of device can also be referred to as device A, and can also be referred to as a passive IoT device.

[0096] The second type of device: can store energy, and has no independent signal generation function when performing backscattering transmission, but can amplify the backscattering signal using the stored energy. This type of device can also be referred to as device B.

[0097] In this application, amplification can be understood as power amplification. That is, the strength of the to-be-sent signal can be power amplified, or the strength of the detected signal can be power amplified.

[0098] The third type of device: the device that can store energy and has independent signal generation function. This type of device can generate active radio frequency (RF) signals for data transmission. This type of device can also be referred to as device C, and can also be referred to as active IoT device.

[0099] The network architecture and service scenarios described in the embodiments of the application are used to more clearly illustrate the technical solutions of the embodiments of the application, and do not constitute a limitation on the technical solutions provided by the embodiments of the application. Those skilled in the art can know that, with the evolution of network architecture and the emergence of new service scenarios, the technical solutions provided by the embodiments of the application are also applicable to similar technical problems.

[0100] As shown in FIG. 4A, the signaling interaction between the IoT device and the reader in the random access process is shown. The Select message, the Query message and the Query rep message are sent to multiple IoT devices, which can be understood as groupcast messages. The Select message can also be referred to as a paging message, which can be used to page one or more IoT devices. The Query message and the Query rep message are used to inform the boundary of a time slot. The Query message can include a Q value. The Q value represents the total number of query time slots. The Ack message and the access message are sent to a single IoT device, which can be understood as unicast messages. The Ack message can also be replaced by a conflict resolution message or a contention resolution message, etc. The Ack message can be included in the message sent by the reader to the IoT device in the random access process, which is used to solve the access conflict between multiple IoT devices in the random access process. For example, the Ack message can carry the unique identifier of the IoT device, which is used to specify the IoT device that successfully accesses.

[0101] Exemplarily, the reader can broadcast a Select message, the IoT device receiving the Select message can select a query slot number according to the Q value, that is, select a time slot, and count from the received query message, and update the counter every time a re-query message is received subsequently, when the selected query slot number is reached, the IoT device sends a random number to the reader, for example, the random number is a random number 16 (RN16).

[0102] In FIG. 4A, it is assumed that the reader is a UE, and the query slot number selected by the IoT device is 1. The UE broadcasts a Select message, and the IoT device receiving the Select message can select a query slot number of 1, and after receiving the query message, sends an RN16 to the reader. The UE receives the RN16 and sends an ACK to the IoT device. The ACK includes the identification of the IoT device. Since the ACK includes the identification of the IoT device, the IoT device sends an electronic product code (EPC) of the IoT device to the reader. After receiving the EPC, the reader can send an access message to the IoT device, and the IoT device successfully accesses, in addition, other multi-round signaling interactions can also be performed, which are not shown in FIG. 4A. The UE can also send a re-query message to notify the start of the time slot with a time slot number of 2. It can also be understood that the time slot with a time slot number of 1 ends.

[0103] As shown in FIG. 4B, for a scenario in which only one IoT device sends a random number in a time slot. The reader sends a select message, and after T4, a query message is sent, T4 being the time delay between the select message and the query message. The IoT device receives and interprets the query message, and after T1, a random number (for example, RN16) is sent, wherein T1 is the time delay of the IoT device interpreting the query message to sending the random number, which can be understood as the interpretation delay of the IoT device. The reader receives and interprets the random number, and after T2, an acknowledgment message (for example, ACK) is sent, wherein T2 is the time delay of the reader interpreting the random number (for example, RN16) to sending the acknowledgment message, which can be understood as the interpretation delay of the reader. Further, the IoT device receives and interprets the acknowledgment message, and after T1, an uplink signal is sent. The uplink signal here includes but is not limited to one or more of an EPC, a 16-bit cyclic redundancy check (CRC) check (Packet CRC). The reader receives and interprets the uplink data, and after T2, a re-query message is sent.

[0104] In one example, the time length of one time slot can be the time length of transmitting the query message or the re-query message + T1 + the time length of transmitting the random number + T2 + the time length of transmitting the confirmation message + T1 + the time length of transmitting the uplink data + T2.

[0105] In another example, the time length of one time slot can be the time length of transmitting the query message or the re-query message + T1 + the time length of transmitting the random number + T2.

[0106] As shown in FIG. 4C, the scenario of transmitting the random number by multiple IoT devices in one time slot. Since multiple IoT devices transmit the random number (e.g., RN16) in the same time slot, the reader-writer cannot accurately identify, and then the reader-writer directly transmits the re-query message. After the reader-writer transmits the re-query message, if no IoT device transmits the random number is detected, the re-query message is transmitted again after T1 and T3. T3 is the waiting time length of the reader-writer.

[0107] As shown in FIG. 5, the signaling structure schematic diagram, wherein (a) and (b) in FIG. 5 are two possible implementation manners. The delimiter can be understood as the preamble signal, the clock calibration represents the clock calibration, the DL Command represents the downlink signaling. The calibration symbol represents the calibration symbol. For example, the reader-writer transmits the signal to the IoT device by using the structure of (a) or (b) described above, the IoT device can take the signal strength of the detected delimiter as the signal strength of the signal from the reader-writer detected by the IoT device, or the IoT device can take the average of the signal strength of the detected delimiter and the detected clock calibration as the signal strength of the signal from the reader-writer detected by the IoT device.

[0108] From the above, since the IoT device (e.g., the first type of device or the second type of device) has no independent signal generation capability, and in order to make the uplink signal transmitted by the IoT device be detected by the reader-writer, the IoT device needs to rely on the excitation source to provide the carrier carrying the uplink signal. Further, based on the distribution of the reader-writer and the excitation source, it can be divided into two scenarios of co-sited or non-co-sited reader-writer and excitation source, in the two different scenarios, how to realize that the uplink signal transmitted by the IoT device is detected by the reader-writer, or how to judge whether the signal strength from the excitation source can bear the road loss to the reader-writer, is a problem worth paying attention to.

[0109] As shown in FIG. 6A and FIG. 6B, the scenario 1 and the scenario 2 are respectively explained:

[0110] For convenience of description, in FIG. 6A and FIG. 6B, the link corresponding to the signal transmitted by the excitation source to the IoT device is recorded as link 1, and the signal strength of the signal transmitted by the excitation source to the IoT device detected by the IoT device can also be recorded as the signal strength of link 1. The link corresponding to the signal transmitted by the IoT device to the reader is recorded as link 2. The link corresponding to the signal transmitted by the reader to the IoT device is recorded as link 3. The signal strength of the signal transmitted by the reader to the IoT device detected by the IoT device can also be recorded as the signal strength of link 3.

[0111] Scenario 1: The reader and the excitation source are co-located, as shown in FIG. 6A.

[0112] Scenario 2: The reader and the excitation source are not co-located, as shown in FIG. 6B.

[0113] In FIG. 6B, (a), (b), and (c) correspond to two different sub-scenarios under scenario 2, respectively. In (a) of FIG. 6B, the distance between the reader and the IoT device is greater than the distance between the excitation source and the IoT device. In (b) of FIG. 6B, the distance between the reader and the IoT device is less than the distance between the excitation source and the IoT device. In (c) of FIG. 6B, the distance between the reader and the IoT device can also be equal to the distance between the excitation source and the IoT device, and the reader and the excitation source are not co-located.

[0114] For the above scenarios 1 and 2, a possible solution is proposed for the IoT device to determine whether the uplink signal to be transmitted can be successfully detected by the reader. For convenience of description, the solution is recorded as solution X, and solution X is specifically: the reader provides a threshold value for the IoT device, the IoT device detects the signal strength of link 3, and if the signal strength is greater than the threshold value, the IoT device transmits an uplink signal to the reader, otherwise, the IoT device does not transmit an uplink signal to the reader. The transmitted uplink signal can also be understood as the uplink signal to be transmitted.

[0115] The threshold value can be determined according to one or more of the following parameters: the transmission power of the excitation source, the minimum signal strength that can be detected by the reader, and the type-related parameters of the IoT device. The transmission power of the excitation source refers to the power of the excitation signal transmitted by the excitation end. The type-related parameters of the IoT device can also be replaced by the backscattering loss of the IoT device and / or the power amplification parameters of the IoT device. Alternatively, it can also be understood that the type-related parameters of the IoT device include the backscattering loss of the IoT device and / or the power amplification parameters of the IoT device. In this application, the minimum signal strength that can be detected can also be understood as a target received power value or detection sensitivity. The excitation source and the excitation end can be interchangeable.

[0116] In combination with the above scenario 1, since the reader and the excitation source are co-located, the reader can learn the transmission power of the excitation source, and thus can provide a more reasonable threshold value. The transmission power of the excitation source can be the same as or have a certain difference from the transmission power of the reader when the reader transmits a signal to the IoT device. Both the transmission power of the excitation source and the transmission power of the reader when the reader transmits a signal to the IoT device can be learned in advance. Therefore, the accuracy of the IoT device in determining whether the transmitted uplink signal can be successfully detected by the reader is high by using the above scheme.

[0117] In combination with the above scenario 2, since the reader and the excitation source are not co-located, the reader cannot learn the transmission power of the excitation source, and thus cannot provide a more reasonable threshold value, or in other words, the threshold value provided by the reader at this time can not be accurate. Therefore, the accuracy of the IoT device in determining whether the transmitted uplink signal can be successfully detected by the reader is low by using the above scheme, and the situation of missing transmission, multiple transmission or false transmission of PDRCH can occur.

[0118] For example, in combination with (a) in FIG. 6B, it is assumed that the IoT device obtains the signal strength of link 3, and the signal strength is less than the threshold value. Based on the related rules in the above scheme X, the IoT device does not transmit an uplink signal to the reader at this time, but since the distance between the reader and the IoT device is less than the distance between the excitation source and the IoT device, that is, the excitation source is relatively close to the IoT device, the signal strength of link 1 can possibly bear the path loss of the IoT device transmitting an uplink signal to the reader. That is, when the signal strength of link 3 is less than the threshold value, if the IoT device transmits an uplink signal to the reader, the uplink signal can also be successfully detected by the reader. However, based on the related rules in the above scheme X, the IoT device does not transmit an uplink signal to the reader, and thus causes missing transmission of PDRCH.

[0119] For another example, in combination with (b) in FIG. 6B, it is assumed that the IoT device obtains the signal strength of link 3, and the signal strength is greater than the threshold value. Based on the related rules in the above scheme X, the IoT device transmits an uplink signal to the reader at this time, but since the distance between the reader and the IoT device is less than the distance between the excitation source and the IoT device, that is, the excitation source is relatively far from the IoT device, the signal strength of link 1 can possibly not bear the path loss of the IoT device transmitting an uplink signal to the reader. That is, when the signal strength of link 3 is greater than the threshold value, if the IoT device transmits an uplink signal to the reader, the uplink signal can not be successfully detected by the reader, and thus causes multiple transmission or false transmission of PDRCH.

[0120] It can be known from the above discussion that the above scheme X is not applicable to scenario 2 and has certain limitations, and the situation of missing transmission, multiple transmission or false transmission of PDRCH can occur.

[0121] Based on this, the embodiment of the present application provides a communication method as shown in FIG. 7, FIG. 8 and FIG. 9, to realize that the IoT device accurately judges whether the signal strength from the excitation source can bear the road loss of the IoT device sending uplink signal to the reader, and effectively reduces the occurrence of the situation of missing transmission, multiple transmission or mis-transmission of PDRCH.

[0122] It can be understood that the following embodiments are described with the first device, the second device, and the IoT device as the execution subject.

[0123] The first device can be a reader, or a device with the function of the reader, or part of the elements in the reader, etc. The reader can be an access network device or a terminal, etc. The first device can also be a device capable of supporting the reader to realize the function, such as a chip system, a hardware circuit, a software module, or a hardware circuit plus a software module, which can be installed in the reader or can be used with the reader. In the embodiment of the present application, the chip system can be composed of a chip, or can include a chip and other discrete devices.

[0124] The second device can be an excitation source, or a device with the function of the excitation source, or part of the elements in the excitation source, etc. The excitation source can also be called an excitation node, an excitation end, a source / node of a carrier supply, etc. The second device can also be a device capable of supporting the excitation source to realize the function, such as a chip system, a hardware circuit, a software module, or a hardware circuit plus a software module, which can be installed in the excitation source or can be used with the excitation source.

[0125] The IoT device can also be called an environmental IoT device. The IoT device can also be understood as a device with the function of the IoT device. The IoT device can also be a device capable of supporting the IoT device to realize the function, such as a chip system, a hardware circuit, a software module, or a hardware circuit plus a software module, which can be installed in the terminal or can be used with the IoT device.

[0126] The method shown in FIG. 7 below can be applied to the scenario that the reader and the excitation source are co-located, and can also be applied to the scenario that the reader and the excitation source are not co-located, i.e. the above-mentioned scenario 1 and scenario 2. That is, the first device and the second device can be co-located or not co-located. When the first device and the second device are co-located, the first device and the second device can be two independent devices, or can be one device, which is not limited in the present application.

[0127] As shown in FIG. 7, the present application provides a communication method. The method comprises:

[0128] Step 700: The first device sends first information. Correspondingly, the IoT device receives the first information from the first device.

[0129] Exemplarily, the first information can be carried by a message sent by the first device to the IoT device, for example, the message can be a selected message or a paging message or a query message, etc., which are not limited in the present application. For another example, the first information can be a broadcast message.

[0130] Exemplarily, the first information can include two possible implementation manners:

[0131] Possible implementation manner 1: the first information is used to indicate the first threshold value and the first sending power. Exemplarily, the first information includes the first threshold value and the first sending power. With the above possible implementation manner 1, the first device can indicate the first threshold value and the first sending power through the first information. Further, the IoT device receiving the first information can save the first threshold value and the first sending power.

[0132] Possible implementation manner 2: the first information is used to indicate the second threshold value, and the second threshold value is determined according to the first threshold value and the first sending power. Exemplarily, the second threshold value can be the sum of the first threshold value and the first sending power. Wherein, the second threshold value is determined according to the first threshold value and the first sending power, which can also be replaced by the second threshold value being the sum of the first threshold value and the first sending power. With the above possible implementation manner 2, the first device can indicate the second threshold value through the first information, and further, the IoT device receiving the first information can save the second threshold value, compared with the possible implementation manner 1 needing to save two parameters, the possible implementation manner 2 only needs to save one parameter.

[0133] In the present application, according to can also be understood as based on.

[0134] For the above possible implementation manners 1 and 2, the first threshold value is the minimum signal strength that can be detected by the first device, and the first threshold value can also be understood as a detection threshold value, or a detection sensitivity, or a target received signal strength, or a target received power. The first sending power is the sending power used by the first device to send a signal to the IoT device. The first sending power can also be called the first transmission power, or the sending power of the PRDCH channel.

[0135] Step 710: the IoT device determines whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss and the first information.

[0136] Exemplarily, the second information can be carried by a message sent by the IoT device to the first device, for example, the message is a feedback message for a selected message, etc., which are not limited in the present application. Exemplarily, the second information can be a message sent by the IoT device to the first device, for example, the message is a feedback message for a selected message, etc., which are not limited in the present application.

[0137] The first signal strength is a signal strength of a signal from the first device detected by the IoT device. For example, the IoT device detects a signal strength of a corresponding signal for the first information or a message carrying the first information as the first signal strength. Alternatively, the first signal strength is a signal strength of a delimiter associated with the first information, or an average of a signal strength of a delimiter associated with the first information and a signal strength of a clock calibration associated with the first information.

[0138] The second signal strength is a signal strength of a signal from the second device detected by the IoT device. For example, the IoT device detects a signal strength of the excitation signal as the second signal strength.

[0139] The first loss is a backscatter loss of the IoT device. The backscatter loss can also be referred to as a reflection loss. For example, the first loss is a fixed value related to a capability or a type of the IoT device. The first loss can be a negative value.

[0140] For example, in combination with FIG. 6A or FIG. 6B, the first signal strength is a signal strength of a signal from the first device detected by the IoT device, i.e., the first signal strength is a signal strength of the link 3. The second signal strength is a signal strength of a signal from the second device detected by the IoT device, i.e., the second signal strength is a signal strength of the link 1.

[0141] The following describes how the IoT device determines whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information in combination with Example 1 and Example 2.

[0142] Example 1: in combination with the possible implementation manner 1 of the first information, the first information is used to indicate the first threshold value and the first transmission power. When determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information,

[0143] If P2+P L -(P t -P1)≥P s , the IoT device sends the second information to the first device.

[0144] If P2+P L -(P t -P1)<P s , the IoT device determines not to send the second information to the first device. The IoT device determining not to send the second information to the first device can also be understood as that the IoT device ignores the selected message.

[0145] In this application, “greater than or equal to” and “greater than” can be replaced with each other, and “less than or equal to” and “less than” can be replaced with each other.

[0146] wherein P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P s represents the first threshold value, P t represents the first transmission power.

[0147] It should be noted that the P1 mentioned above can be obtained by the IoT device detecting the signal strength of the signal from the first device. The P2 mentioned above can be obtained by the IoT device detecting the signal strength of the signal from the second device. The P L mentioned above can be saved in the local memory of the IoT device and is a fixed value. The P t mentioned above and the P s mentioned above can be obtained by the IoT device through the first information. Therefore, the IoT device can make a judgment according to the above-mentioned parameters, and determine whether to send the second information to the first device according to the judgment result, that is, determine whether the uplink signal sent by the IoT device can be successfully detected by the reader.

[0148] Example 2: in combination with the possible implementation manner 2 of the first information mentioned above, the first information is used to indicate the second threshold value, when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss and the first information,

[0149] If P1+P L +P2≥P k , the IoT device sends the second information to the first device.

[0150] If P1+P L +P2 k , the IoT device determines not to send the second information to the first device. The IoT device determining not to send the second information to the first device can also be understood as the IoT device ignoring the selected message.

[0151] wherein P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P k represents the second threshold value.

[0152] It should be noted that the P1 mentioned above can be obtained by the IoT device detecting the signal strength of the signal from the first device. The P2 mentioned above can be obtained by the IoT device detecting the signal strength of the signal from the second device. The P L mentioned above can be saved in the local memory of the IoT device and is a fixed value. The P kThe IoT device can obtain the first information. Thus, the IoT device can determine whether to send the second information to the first device according to the above parameters, and determine whether the uplink signal sent by the IoT device can be successfully detected by the reader according to the determination result.

[0153] For example, if the IoT device does not have the energy amplification capability, the IoT device can determine whether to send the second information to the first device according to the above example 1 or example 2. The IoT device without the energy amplification capability can also be described as the IoT device being the first type of device, or the IoT device not having the power amplification (or power amplifier) capability. If the IoT device has the energy amplification capability, the IoT device can also determine whether to send the second information to the first device according to the above example 1 or example 2.

[0154] In addition, in a possible implementation, if the IoT device has the energy amplification capability, the IoT device can also determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and the energy amplification value of the IoT device. In this application, the energy amplification value can also be understood as the power amplification value, and the energy amplification parameter can also be understood as the power amplification parameter.

[0155] In a possible implementation, the energy amplification value of the IoT device is the energy amplification parameter of the IoT device. The parameter is a fixed value. The parameter is a parameter depending on the type or capability of the IoT device.

[0156] In a possible implementation, the energy amplification value of the IoT device is determined according to the energy amplification parameter of the IoT device, the energy storage efficiency of the IoT device, and the feedback time slot selected by the IoT device.

[0157] The energy amplification parameter of the IoT device can be a fixed value, representing the maximum energy that the IoT device can use when performing energy amplification using the stored energy, for example, the energy amplification parameter of the IoT device is denoted as E0.

[0158] The feedback time slot selected by the IoT device can also be understood as the time slot determined by the IoT device for feedback. According to the energy storage efficiency of the IoT device, the feedback time slot selected by the IoT device, and the time length of a time slot, the energy that the IoT device can store can be determined, for example, the energy that the IoT device can store is denoted as E1. For example, the energy that the IoT device can store is the product of the energy storage efficiency of the IoT device, the feedback time slot selected by the IoT device, and the time length of a time slot.

[0159] The possible calculation of the time length of a time slot can refer to the above related content. Among them, the energy storage efficiency of the IoT device and the time length of a time slot are generally fixed values, so the larger the sequence number of the feedback time slot selected by the IoT device, the more energy the IoT device can store.

[0160] Further, the energy amplification value of the IoT device is the smaller one of the energy amplification parameter of the IoT device and the energy that the IoT device can store. For example, P a is the energy amplification parameter of the IoT device, if E1>E0, P a =E0, if E1≤E0, P a =E1.

[0161] The following will specifically illustrate how the IoT device determines whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information and the energy amplification value of the IoT device, in combination with Examples 3 and 4.

[0162] Example 3: in combination with the possible implementation manner 1 of the above first information, the first information is used to indicate the first threshold value and the first transmission power. When determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information and the energy amplification value of the IoT device,

[0163] if P2+P L +P a -(P t -P1)≥P s , the IoT device sends the second information to the first device.

[0164] if P2+P L +P a -(P t -P1)<P s , the IoT device determines not to send the second information to the first device.

[0165] Among them, P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P s represents the first threshold value, P t represents the first transmission power, and P a is the energy amplification value of the IoT device.

[0166] Example 4: in combination with the possible implementation manner 2 of the above first information, the first information is used to indicate the second threshold value, when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information and the energy amplification value of the IoT device,

[0167] if P1+P L +Pa + P2≥ P k the IoT device sends the second information to the first device;

[0168] if P1+ P L + P a + P2< P k the IoT device determines not to send the second information to the first device.

[0169] wherein P1represents the first signal strength, P L represents the first loss, P2represents the second signal strength, P k represents the second threshold value, P a is an energy amplification value of the IoT device.

[0170] In addition, in combination with the above-mentioned example 3 and example 4, P L + P a may also be referred to as a loss value of the IoT device, or a loss value of the second type of device. If the loss value is a positive value, it means that P a is greater than P L . If the loss value is a negative value, it means that P a is less than P L . If the loss value is zero, it means that P a is equal to P L .

[0171] In summary, the method provided by the above-mentioned embodiment shown in FIG. 7 can be applied to scenarios where the first device and the second device are co-located or not co-located. The IoT device can accurately determine whether to send the second information, that is, determine whether the signal strength of the signal from the second device can bear the loss of the IoT device sending the uplink signal to the first device, thereby improving the success rate of the first device detecting the second information, and reducing the occurrence of missed transmission, multiple transmission or false transmission PDRCH.

[0172] The method shown in the following FIG. 8 can be applied to scenarios where the reader and the excitation source are co-located, and also to scenarios where the reader and the excitation source are not co-located, that is, the above-mentioned scenario 1 and scenario 2. That is, the first device and the second device can be co-located or not co-located. When the first device and the second device are co-located, the first device and the second device can be two independent devices, or can be one device, which is not limited by the present application.

[0173] As shown in FIG. 8, the present application provides a communication method. The method comprises:

[0174] Step 800: The first device sends third information, the third information being used to indicate whether the first device and the second device are co-located. Correspondingly, the IoT device receives the third information from the first device. If the third information is used to indicate that the first device and the second device are not co-located, step 810A is performed. If the third information is used to indicate that the first device and the second device are co-located, step 810B is performed.

[0175] Exemplarily, the third information can be carried by a message sent by the first device to the IoT device, for example, the message can be a selection message or a paging message or a query message, etc., which are not limited in the present application. For another example, the third information can be a broadcast message. For example, the third information can occupy 1 bit.

[0176] Step 810A: If the third information is used to indicate that the first device and the second device are not co-located, the IoT device determines whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss and the first information.

[0177] In a possible implementation, before step 810A is performed, the IoT device can further receive the first information from the first device, and the related content of the first information can refer to the related description in step 700 described above. The third information and the first information can be carried by the same message or by different messages, which are not limited in the present application.

[0178] Step 810A can refer to the related content in step 710 described above, which will not be repeated here.

[0179] Step 810B: If the third information is used to indicate that the first device and the second device are co-located, the IoT device determines whether to send the second information to the first device according to the first signal strength and a third threshold value. The third threshold value is determined according to the first transmission power, the signal strength of the signal from the IoT device detected by the first device, and a parameter related to the type of the IoT device.

[0180] In a possible implementation, before step 810B is performed, the IoT device can further receive fourth information from the first device, the fourth information being used to indicate the third threshold value. The third information and the fourth information can be carried by the same message or by different messages, which are not limited in the present application.

[0181] The IoT device determines whether to send the second information to the first device according to the first signal strength and the third threshold value, which can refer to the related description in the above scheme X, and the third threshold value can be the same as the threshold value in scheme X.

[0182] Exemplarily, if the IoT device determines that the first signal strength is greater than the third threshold value, the IoT device sends the second information to the first device. If the IoT device determines that the first signal strength is less than or equal to the third threshold value, the IoT device does not send the second information to the first device.

[0183] As an optional implementation, the first device can determine whether to send the third information, or in other words, the first device can determine whether to carry the third information in the message sent to the IoT device.

[0184] Further, in a possible implementation, if the first device sends the third information, that is, the first device performs the above step 800, the IoT device can determine whether to send the second information to the first device based on the above step 810A or step 810B.

[0185] In another possible implementation, if the first device does not send the third information, but the first device sends the first information, the IoT device determines that the first device and the second device are not co-located, and then determines whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss and the first information. That is, the first information implicitly indicates that the first device and the second device are not co-located.

[0186] In yet another possible implementation, if the first device does not send the third information, but the first device sends the fourth information, the IoT device determines that the first device and the second device are co-located, and then determines whether to send the second information to the first device according to the first signal strength and the third threshold value. That is, the fourth information implicitly indicates that the first device and the second device are co-located.

[0187] In summary, the method provided by the above embodiment shown in FIG. 8 can be applied to scenarios in which the first device and the second device are co-located or not co-located. The first device can indicate to the IoT device whether the first device and the second device are co-located, so that the IoT device selects a suitable scheme to determine whether to send the second information, that is, to determine whether the signal strength of the signal from the second device can bear the loss of the IoT device sending uplink signals to the first device, thereby improving the success rate of the first device detecting the second information, and reducing the occurrence of missed transmission, multiple transmission or false transmission of PDRCH.

[0188] The method shown in FIG. 9 below can be applied to scenarios in which the reader and the excitation source are co-located, and can also be applied to scenarios in which the reader and the excitation source are not co-located, that is, the above scenario 1 and scenario 2. That is, the first device and the second device can be co-located or not co-located. When the first device and the second device are co-located, the first device and the second device can be two independent devices, or can be one device, which is not limited in the present application.

[0189] As shown in FIG. 9, the present application provides a communication method. The method comprises:

[0190] Step 900: The first device sends fourth information, the fourth information comprising a third threshold value. The third threshold value is determined according to a first transmission power, a signal strength of a signal from the IoT device detected by the first device, and a parameter related to the type of the IoT device. The first transmission power is a transmission power used by the first device when transmitting a signal to the IoT device.

[0191] Exemplarily, the fourth information can be carried by a message sent by the first device to the IoT device, for example, the message can be a selection message or a paging message or a query message, etc., which is not limited in the present application. For another example, the fourth information can be a broadcast message.

[0192] The third threshold value can be the same as the threshold value in scheme X, and the related content in scheme X can be referred to.

[0193] Step 910: The IoT device determines whether to send second information to the first device according to the first signal strength, the second signal strength, and the third threshold value. The first signal strength is the signal strength of the signal from the first device detected by the IoT device; the second signal strength is the signal strength of the signal from the second device detected by the IoT device.

[0194] The first signal strength and the second signal strength can refer to the related content in the above step 700.

[0195] When determining whether to send the second information according to the first signal strength, the second signal strength, and the third threshold value, the following two cases can be specifically as follows:

[0196] Case 1: If the first signal strength is greater than or equal to the third threshold value, and the second signal strength is greater than or equal to the first signal strength, the IoT device sends the second information to the first device.

[0197] If the first signal strength is greater than or equal to the third threshold value, and the second signal strength is greater than or equal to the first signal strength, the IoT device sends the second information to the first device, which can be replaced by that if the first signal strength is greater than or equal to the third threshold value, and the difference between the second signal strength and the first signal strength is greater than or equal to a preset value, the IoT device sends the second information to the first device, wherein the preset value can be 0, or determined according to the type of the IoT device. For example, if the type of the IoT device is the first type of device, the preset value is 0. For example, if the type of the IoT device is the second type of device, the preset value can be less than 0, for example, a negative energy amplification parameter of the IoT device.

[0198] Case 2: If the first signal strength is less than the third threshold value, or the second signal strength is less than the first signal strength, the IoT device determines not to send the second information to the first device.

[0199] If the first signal strength is less than the third threshold value, or the second signal strength is less than the first signal strength, the IoT device determines not to send the second information to the first device, which can also be replaced by: if the first signal strength is less than the third threshold value, or the difference between the second signal strength and the first signal strength is less than a preset value, the IoT device determines not to send the second information to the first device. The preset value can refer to the related content in case 1 described above.

[0200] In summary, the method provided by the embodiment shown in FIG. 9 can be applied to the scenario that the first device and the second device are co-sited or non-co-sited. Compared with only comparing the first signal strength with the third threshold value, the embodiment shown in FIG. 9 also compares the second signal strength with the first signal strength, so that the IoT device can accurately determine whether to send the second information, that is, determine whether the signal strength of the signal from the second device can bear the road loss of the IoT device sending the uplink signal to the first device, thereby improving the success rate of the first device detecting the second information, and reducing the occurrence of the situation of missing transmission, multiple transmission or false transmission PDRCH. It can be understood that, by using the method provided by the embodiment shown in FIG. 9, the IoT device can not need to judge whether the first device and the second device are co-sited or non-co-sited, but directly judge whether the IoT device is located in the coverage range provided by the first device by comparing the first signal strength with the third threshold value and comparing the second signal strength with the first signal strength, so as to determine whether the second information can be sent. If the first signal strength is greater than or equal to the third threshold value, and the second signal strength is greater than or equal to the first signal strength, the IoT device is located in the coverage range provided by the first device, therefore, the IoT device can send the second information to the first device. If the first signal strength is less than the third threshold value, or the second signal strength is less than the first signal strength, the IoT device is not located in the coverage range provided by the first device, therefore, the IoT device determines not to send the second information to the first device.

[0201] It can be understood that, in order to implement the functions in the above embodiments, each communication device (such as an IoT device or a first device or a second device, etc.) includes a hardware structure and / or a software module for performing each function. Those skilled in the art should easily realize that, in combination with the units and method steps of each example described in the embodiments disclosed in the present application, the present application can be realized in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software driven hardware depends on the specific application scenario and design constraints of the technical solution.

[0202] FIG. 10 and FIG. 11 are structural diagrams of possible communication apparatuses provided by embodiments of the present application. The communication apparatuses can be used to implement the functions of the various communication apparatuses in the above method embodiments, and thus can also achieve the beneficial effects possessed by the above method embodiments.

[0203] As shown in FIG. 10, the communication apparatus 1000 includes a processing unit 1010 and a transceiver unit 1020.

[0204] When the communication apparatus 1000 is used to implement the functions of the IoT device in the above method embodiments, the processing unit 1010 is configured to:

[0205] The transceiver unit 1020 is configured to receive first information from a first apparatus, the first information being used to indicate a first threshold value and a first transmission power, or the first information being used to indicate a second threshold value determined according to the first threshold value and the first transmission power; wherein the first threshold value is a minimum signal strength that can be detected by the first apparatus, and the first transmission power is a transmission power used by the first apparatus to transmit a signal to an Internet of Things (IoT) device; and the processing unit 1010 is configured to determine whether to transmit second information to the first apparatus according to a first signal strength, a second signal strength, a first loss and the first information; wherein the first signal strength is a signal strength of a signal from the first apparatus detected by the IoT device, the second signal strength is a signal strength of a signal from a second apparatus detected by the IoT device, and the first loss is a backscattering loss of the IoT device.

[0206] In a possible design, the second threshold value is a sum of the first threshold value and the first transmission power.

[0207] In a possible design, the first information is used to indicate the first threshold value and the first transmission power; and when determining whether to transmit the second information to the first apparatus according to the first signal strength, the second signal strength, the first loss and the first information, the processing unit 1010 is configured to: if P1+P L -(P t -P1)≥P s , transmit the second information to the first apparatus; or if P1+P L -(P t -P1)<P s , determine not to transmit the second information to the first apparatus; wherein P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, and P s represents the first threshold value, and P t represents the first transmission power.

[0208] In a possible design, the first information is used to indicate the second threshold value; and the processing unit 1010 is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information, and send the second information to the first device if P1+P L +P2≥P k , and determine not to send the second information to the first device if P1+P L +P2 k ; where P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, and P k represents the second threshold value.

[0209] In a possible design, the IoT device does not have the energy amplification capability.

[0210] In a possible design, the IoT device has the energy amplification capability; and the processing unit 1010 is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and an energy amplification value of the IoT device, when determining whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information.

[0211] In a possible design, the energy amplification value of the IoT device is determined according to an energy amplification parameter of the IoT device, and a storage energy efficiency of the IoT device and a feedback time slot selected by the IoT device.

[0212] In a possible design, the first information is used to indicate the first threshold value and the first transmission power; and the processing unit 1010 is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and an energy amplification parameter of the IoT device, and send the second information to the first device if P2+P L +P a -(P t -P1)≥P s , and determine not to send the second information to the first device if P2+P L +P a -(P t -P1)<P s ; where P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P s represents the first threshold value, P t represents the first transmission power, and P a is the energy amplification value of the IoT device.

[0213] In a possible design, the first information is used to indicate the second threshold value; the processing unit 1010 is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, the first information, and the energy amplification parameter of the IoT device, and send the second information to the first device if P1+P L +P a +P2≥P k , and determine not to send the second information to the first device if P1+P L +P a +P2<P k ; where P1 represents the first signal strength, P L represents the first loss, P2 represents the second signal strength, P k represents the second threshold value, and P a is the energy amplification value of the IoT device.

[0214] In a possible design, the transceiver 1020 is configured to receive third information, where the third information is used to indicate whether the first device and the second device are co-located; and the processing unit 1010 is configured to determine whether to send the second information to the first device according to the first signal strength, the second signal strength, the first loss, and the first information, if the third information is used to indicate that the first device and the second device are not co-located.

[0215] In a possible design, the transceiver 1020 is configured to receive fourth information from the first device, where the fourth information is used to indicate a third threshold value; the third threshold value is determined according to the first transmission power, a signal strength of a signal from the IoT device detected by the first device, and a type-related parameter of the IoT device; and the processing unit 1010 is configured to determine whether to send the second information to the first device according to the first signal strength and the fourth information, if the third information is used to indicate that the first device and the second device are co-located.

[0216] When the communication device 1000 is configured to implement the functions of the first device in the method embodiments described above, the following applies:

[0217] The processing unit 1010 invokes the transceiver unit 1020 to perform: sending first information, the first information being used to indicate a first threshold value and a first transmission power, or the first information being used to indicate a second threshold value, the second threshold value being determined according to the first threshold value and the first transmission power; wherein the first threshold value indicates a minimum signal strength that can be detected by the first device, and the first transmission power is a transmission power used by the first device to send a signal to the IoT device.

[0218] In a possible design, the second threshold value is a sum of the first threshold value and the first transmission power.

[0219] In a possible design, the transceiver unit 1020 is configured to send third information, the third information being used to indicate whether the first device and the second device are co-located.

[0220] When the communication device 1000 is used to implement the function of the IoT device in the method embodiments, the processing unit 1010 is configured to perform the following steps.

[0221] The transceiver unit 1020 is configured to receive fourth information from the first device, the fourth information including a third threshold value, the third threshold value being determined according to a first transmission power, a signal strength of a signal from the first device detected by the IoT device, and a type-related parameter of the IoT device; the first transmission power being a transmission power used by the first device to send a signal to the IoT device; and the processing unit 1010 is configured to determine, according to the first signal strength, the second signal strength, and the third threshold value, whether to send second information to the first device; wherein the first signal strength is a signal strength of a signal from the first device detected by the IoT device; and the second signal strength is a signal strength of a signal from the second device detected by the IoT device.

[0222] In a possible design, the processing unit 1010 is configured to, when determining whether to send the second information according to the first signal strength, the second signal strength, and the third threshold value, send the second information to the first device if the first signal strength is greater than or equal to the third threshold value, and the second signal strength is greater than or equal to the first signal strength; and determine not to send the second information to the first device if the first signal strength is less than the third threshold value, or the second signal strength is less than the first signal strength.

[0223] The processing unit 1010 and the transceiver unit 1020 are described in more detail above, and thus details are not repeated here.

[0224] As shown in FIG. 11, the communication apparatus 1100 includes a processor 1110. Optionally, the communication apparatus 1100 can further include an interface circuit 1120. The processor 1110 and the interface circuit 1120 are coupled with each other. It can be understood that the interface circuit 1120 can be a transceiver or an input / output interface. Optionally, the communication apparatus 1100 can further include a memory 1130, used to store instructions executed by the processor 1110 or input data required by the processor 1110 to execute instructions or data generated after the processor 1110 executes instructions.

[0225] When the communication apparatus 1100 is used to implement the method embodiments described above, the processor 1110 is configured to implement the functions of the processing unit 1010 described above, and the interface circuit 1120 is configured to implement the functions of the transceiver unit 1020 described above.

[0226] It can be understood that the processor in the embodiments of the present application can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field programmable gate arrays (FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. The general-purpose processor can be a microprocessor or any conventional processor.

[0227] In the present application, another example of providing an apparatus is provided, the notification apparatus includes at least one processor and at least one memory, the at least one processor and the at least one memory are coupled, the at least one memory is used to store instructions, when the instructions are executed by the at least one processor, the communication apparatus executes the method in the embodiments described above. Taking the communication apparatus including one processor and one memory as an example, as shown in FIG. 11, the communication apparatus 1100 includes one processor 1110 and one memory 1130. The processor 1110 and the memory 1130 are coupled, and the memory 1130 stores instructions, when the instructions stored in the memory 1130 are executed by the processor 1110, the communication apparatus 1100 executes the method executed by each communication apparatus in the embodiments described above.

[0228] The method steps in the embodiments of the present application can be implemented in hardware or in software instructions executable by a processor. The software instructions can be composed of corresponding software modules, which can be stored in a random access memory, a flash memory, a read-only memory, a programmable read-only memory, an erasable programmable read-only memory, an electrically erasable programmable read-only memory, a register, a hard disk, a mobile hard disk, a CD-ROM, or any other form of storage medium well known in the art. An exemplary storage medium is coupled to the processor, so that the processor can read information from and write information to the storage medium. The storage medium can also be an integral part of the processor. The processor and the storage medium can be located in an ASIC. In addition, the ASIC can be located in the IoT device or the first device described above. The processor and the storage medium can also exist as discrete components in the IoT device or the first device.

[0229] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented by software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When loaded and executed by a computer, all or part of the processes or functions of the embodiments are performed. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user equipment, or other programmable apparatus. The computer program or instructions can be stored in a computer-readable storage medium or transferred from one computer-readable storage medium to another, for example, the computer program or instructions can be transferred from one website, computer, server, or data center to another via wired or wireless means. The computer-readable storage medium can be any available medium accessible by a computer or a data storage device such as a server, data center, etc. integrated with one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, a magnetic tape; an optical medium, such as a digital video disc; or a semiconductor medium, such as a solid-state disk. The computer-readable storage medium can be a volatile or non-volatile storage medium, or can include both volatile and non-volatile storage media.

[0230] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be referred to each other if there is no special description and logical conflict. The technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0231] In the present application, "at least one" means one or more, "multiple" means two or more. The "and / or" describes the relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent: A exists alone, A and B exist together, B exists alone, where A, B can be singular or plural. In the text description of the present application, the character " / ", generally indicates that the associated objects before and after are in an "or" relationship; in the formula of the present application, the character " / ", indicates that the associated objects before and after are in a "division" relationship. "Including at least one of A, B and C" can mean: including A; including B; including C; including A and B; including A and C; including B and C; including A, B and C.

[0232] It can be understood that various numerical numbers involved in the embodiments of the present application are only distinguished for the convenience of description, and are not used to limit the scope of the embodiments of the present application. The size of the serial number of the above processes does not mean the order of execution, and the execution order of the processes should be determined according to its function and inherent logic.

Claims

1. A communication method, characterized in that, The method includes: The system receives first information from a first device, the first information indicating a first threshold value and a first transmission power, or the first information indicating a second threshold value, the second threshold value being determined based on the first threshold value and the first transmission power; wherein the first threshold value is the minimum signal strength that the first device can detect, and the first transmission power is the transmission power used by the first device to send signals to IoT devices; Whether to send second information to the first device is determined based on the first signal strength, the second signal strength, the first loss, and the first information; wherein, the first signal strength is the signal strength of the signal detected by the IoT device from the first device; the second signal strength is the signal strength of the signal detected by the IoT device from the second device; and the first loss is the backscattering loss of the IoT device.

2. The method as described in claim 1, characterized in that, The second threshold value is the sum of the first threshold value and the first transmission power.

3. The method as described in claim 1, characterized in that, The first information is used to indicate the first threshold value and the first transmission power; Determining whether to send second information to the first device based on the first signal strength, the second signal strength, the first loss, and the first information includes: If P2+P L -(P t -P1)≥P s , and send the second information to the first device; If P2+P L -(P t -P1)<P s Therefore, it is determined not to send the second information to the first device; Where P1 represents the first signal strength, P L P1 represents the first loss, P2 represents the second signal strength, and P... s P represents the first threshold value. t This represents the first transmission power.

4. The method as described in claim 1 or 2, characterized in that, The first information is used to indicate the second threshold value; Determining whether to send second information to the first device based on the first signal strength, the second signal strength, the first loss, and the first information includes: If P1+P L +P2≥P k , and send the second information to the first device; If P1+P L +P2<P k Therefore, it is determined not to send the second information to the first device; Where P1 represents the first signal strength, P L P1 represents the first loss, P2 represents the second signal strength, and P... k This represents the second threshold value.

5. The method as described in claim 3 or 4, characterized in that, The IoT device does not have the ability to amplify energy.

6. The method as described in claim 1 or 2, characterized in that, The IoT device has the ability to amplify energy. Determining whether to send second information to the first device based on the first signal strength, the second signal strength, the first loss, and the first information includes: Whether to send the second information to the first device is determined based on the first signal strength, the second signal strength, the first loss, the first information, and the power amplification value of the IoT device.

7. The method as described in claim 6, characterized in that, The energy amplification value of the IoT device is determined based on the energy amplification parameters of the IoT device, the energy storage efficiency of the IoT device, and the selected feedback time slot of the IoT device.

8. The method as described in claim 6 or 7, characterized in that, The first information is used to indicate the first threshold value and the first transmission power; Determining whether to send second information to the first device based on the first signal strength, the second signal strength, the first loss, the first information, and the power amplification parameters of the IoT device includes: If P2+P L +P a -(P t -P1)≥P s , and send the second information to the first device; If P2+P L +P a -(P t -P1)<P s Therefore, it is determined not to send the second information to the first device; Where P1 represents the first signal strength, P L P1 represents the first loss, P2 represents the second signal strength, and P... s P represents the first threshold value. t P represents the first transmission power. a This is the energy amplification value of the IoT device.

9. The method as described in claim 6 or 7, characterized in that, The first information is used to indicate the second threshold value; Determining whether to send second information to the first device based on the first signal strength, the second signal strength, the first loss, the first information, and the power amplification parameters of the IoT device, including... If P1+P L +P a +P2≥P k , and send the second information to the first device; If P1+P L +P a +P2<P k Therefore, it is determined not to send the second information to the first device; Where P1 represents the first signal strength, P L P1 represents the first loss, P2 represents the second signal strength, and P... k P represents the second threshold value. a This is the energy amplification value of the IoT device.

10. The method according to any one of claims 1-9, characterized in that, The method further includes: Receive third information, the third information being used to indicate whether the first device and the second device share a site address; Determining whether to send second information to the first device based on the first signal strength, the second signal strength, the first loss, and the first information includes: If the third information is used to indicate that the first device and the second device are not co-located, it is determined whether to send the second information to the first device based on the first signal strength, the second signal strength, the first loss, and the first information.

11. The method as described in claim 10, characterized in that, The method further includes: The system receives fourth information from the first device, the fourth information indicating a third threshold value; wherein the third threshold value is determined based on the first transmission power, the signal strength of the signal detected by the first device from the IoT device, and parameters related to the type of the IoT device; If the third information is used to indicate that the first device and the second device share a common site, the system determines whether to send the second information to the first device based on the first signal strength and the fourth information.

12. A communication method, characterized in that, The method includes: Sending first information, the first information being used to indicate a first threshold value and a first transmission power, or the first information being used to indicate a second threshold value, the second threshold value being determined based on the first threshold value and the first transmission power; wherein, the first threshold value indicates the minimum signal strength that the first device can detect, and the first transmission power is the transmission power used by the first device to send signals to the IoT device.

13. The method as described in claim 12, characterized in that, The second threshold value is the sum of the first threshold value and the first transmission power.

14. The method as described in claim 12 or 13, characterized in that, Send a third message, which is used to indicate whether the first device and the second device share a site.

15. A communication method, characterized in that, The method includes: The system receives fourth information from the first device, the fourth information including a third threshold value, the third threshold value being determined based on a first transmission power, the signal strength of the signal detected by the first device from the IoT device, and parameters related to the type of the IoT device; the first transmission power is the transmission power used by the first device to send a signal to the IoT device; Whether to send second information to the first device is determined based on the first signal strength, the second signal strength, and the third threshold value; wherein, the first signal strength is the signal strength detected by the IoT device from the first device; and the second signal strength is the signal strength detected by the IoT device from the second device.

16. The method as described in claim 15, characterized in that, Determining whether to send the second information based on the first signal strength, the second signal strength, and the third threshold value includes: If the first signal strength is greater than or equal to the third threshold value, and the second signal strength is greater than or equal to the first signal strength, the second information is sent to the first device; If the first signal strength is less than the third threshold, or the second signal strength is less than the first signal strength, it is determined that the second information will not be sent to the first device.

17. A communication device, characterized in that, Includes units or modules for performing the method as described in any one of claims 1 to 16.

18. A communication device, characterized in that, The communication device includes at least one processor; the at least one processor is configured to perform the method as described in any one of claims 1 to 16.

19. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a program that, when run on the device, causes the device to perform the method as described in any one of claims 1 to 16.

20. A computer program product, characterized in that, The computer program product includes a program or instructions that, when executed by a device, cause the device to perform the method as described in any one of claims 1 to 16.

Images