WO2024008001A1

WO2024008001A1 - Method and apparatus for determining number of devices, and electronic device

Info

Publication number: WO2024008001A1
Application number: PCT/CN2023/104942
Authority: WO
Inventors: 谭俊杰; 黄伟; 简荣灵
Original assignee: 维沃移动通信有限公司
Priority date: 2022-07-06
Filing date: 2023-06-30
Publication date: 2024-01-11
Also published as: CN117424681A

Abstract

The present application belongs to the technical field of communications. Disclosed are a method and apparatus for determining the number of devices, and an electronic device. The method for determining the number of devices in the embodiments of the present application comprises: a first node sending first information to backscatter communication (BSC) devices, wherein the first information is used for instructing the BSC devices to send first backscatter signals; and the first node determining the number of BSC devices on the basis of target information, wherein the target information comprises at least one piece of the following: a baseband IQ signal which is acquired on the basis of the first backscatter signals, second information which is sent by a third node, and third information which is sent by the third node, the second information being used for indicating the baseband IQ signal, the third information being used for indicating the number of BSC devices, and the number of BSC devices being obtained on the basis of the baseband IQ signal.

Description

Equipment quantity determination method, device and electronic equipment

Cross-references to related applications

This application claims priority from Chinese Patent Application No. 202210800747.X filed in China on July 6, 2022, the entire content of which is incorporated herein by reference.

Technical field

This application belongs to the field of communication technology, and specifically relates to a method, device and electronic equipment for determining the quantity of equipment.

Background technique

The Radio Frequency Identification (RFID) backscatter communication system is a backscatter communication system that identifies and reads data from the Backscatter Communication (BSC) devices within the coverage of the reader. In the RFID backscatter communication system, the reader can obtain the number of BSC devices within its coverage by performing an inventory process. The inventory process refers to the process of identifying BSC devices and reading data. The inventory process is relatively complex. Obtaining the number of BSC devices through the inventory process requires a lot of signaling and time overhead.

Contents of the invention

Embodiments of the present application provide a method, device, and electronic device for determining the number of devices, which can solve the problem in related technologies that obtaining the number of BSC devices requires a large amount of signaling and time overhead.

The first aspect provides a method for determining the quantity of equipment, including:

The first node sends first information to the backscatter communication BSC device, where the first information is used to instruct the BSC device to send a first backscatter signal;

The first node determines the number of BSC devices based on target information;

Wherein, the target information includes at least one of the following:

A baseband IQ signal obtained based on the first backscattered signal;

the second information sent by the third node;

The third information sent by the third node;

Wherein, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices, and the number of BSC devices is obtained based on the baseband IQ signal.

The second aspect provides a method for determining the quantity of equipment, including:

The third node acquires the baseband IQ signal based on the first backscattered signal sent by the BSC device;

The third node sends second information or third information to the first node, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices;

Wherein, the number of BSC devices is obtained based on the baseband IQ signal.

The third aspect provides a method for determining the quantity of equipment, including:

The BSC device receives the first information sent by the first node, where the first information is used to instruct the BSC device to send a first backscatter signal;

The BSC device sends the first backscattered signal, and the first backscattered signal is used to obtain the number of the BSC devices, where the number of BSC devices is obtained based on a baseband IQ signal, and the baseband IQ A signal is obtained based on said first backscattered signal.

In a fourth aspect, a device for determining the number of devices is provided. The first node includes the device for determining the number of devices. The device includes:

A first sending module, configured to send first information to the BSC device, where the first information is used to instruct the BSC device to send a first backscatter signal;

A determination module, configured to determine the number of BSC devices based on target information;

Wherein, the target information includes at least one of the following:

A baseband IQ signal obtained based on the first backscattered signal;

the second information sent by the third node;

The third information sent by the third node;

In a fifth aspect, a device for determining the quantity of equipment is provided. The third node includes the device for determining the quantity of equipment. The device includes:

An acquisition module, configured to acquire the baseband IQ signal based on the first backscatter signal sent by the backscatter communication BSC device;

A sending module, configured to send second information or third information to the first node, where the second information is In order to indicate the baseband IQ signal, the third information is used to indicate the number of the BSC equipment;

Wherein, the number of BSC devices is obtained based on the baseband IQ signal.

In the sixth aspect, a device for determining the quantity of equipment is provided. BSC equipment includes the device for determining the quantity of equipment. The device includes:

A first receiving module, configured to receive the first information sent by the first node, where the first information is used to instruct the BSC device to send a first backscatter signal;

A sending module, configured to send the first backscattered signal, the first backscattered signal being used to obtain the number of the BSC devices, wherein the number of BSC devices is obtained based on the baseband IQ signal, the baseband The IQ signal is obtained based on the first backscattered signal.

In a seventh aspect, an electronic device is provided. The electronic device includes a processor and a memory. The memory stores programs or instructions that can be run on the processor. The program or instructions are implemented when executed by the processor. The steps of the method described in the first aspect, or the steps of implementing the method described in the second aspect, or the steps of the method described in the third aspect.

In an eighth aspect, an electronic device is provided, including a processor and a communication interface, wherein the communication interface is used to: send first information to a BSC device, and the first information is used to instruct the BSC device to send a first Backscatter signal; the processor is configured to: determine the number of the BSC devices based on target information; wherein the target information includes at least one of the following: a baseband IQ signal acquired based on the first backscatter signal; The second information sent by the three nodes; the third information sent by the third node; wherein the second information is used to indicate the baseband IQ signal, the third information is used to indicate the number of the BSC equipment, the BSC equipment The quantity is obtained based on the baseband IQ signal. Alternatively, the processor is configured to: obtain the baseband IQ signal based on the first backscatter signal sent by the backscatter communication BSC device; the communication interface is configured to: send the second information or the third information to the first node, the The second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices; wherein the number of BSC devices is obtained based on the baseband IQ signal. Alternatively, the communication interface is used to: receive the first information sent by the first node, the first information is used to instruct the BSC device to send the first backscatter signal; the communication interface is also used to: send the A first backscattered signal, the first backscattered signal is used to obtain the number of the BSC devices, wherein the number of the BSC devices is obtained based on the baseband IQ signal, and the baseband IQ signal is based on the first backscattered signal. The scattering signal is obtained.

A ninth aspect provides a device quantity determination system, including: a first node and a BSC device. The first node can be used to perform the steps of the method described in the first aspect. The BSC device can be used to perform the steps of the method described in the first aspect. The steps of the method described in three aspects. Alternatively, a device quantity determination system is provided, including: a first node, a BSC device and a third node. The first node can be used to perform the steps of the method described in the first aspect, and the third node can be used to To perform the steps of the method described in the second aspect, the BSC device may be used to perform the steps of the method described in the third aspect.

In a tenth aspect, a readable storage medium is provided. Programs or instructions are stored on the readable storage medium. When the programs or instructions are executed by a processor, the steps of the method described in the first aspect are implemented, or the steps of the method are implemented as described in the first aspect. The steps of the method described in the second aspect, or the steps of implementing the method described in the third aspect.

In an eleventh aspect, a chip is provided. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the method described in the first aspect. method, or implement the method as described in the second aspect, or implement the method as described in the third aspect.

In a twelfth aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement as described in the first aspect The steps of the method, or the steps of the method described in the second aspect, or the steps of the method described in the third aspect.

In this embodiment of the present application, the first node sends the first information to the backscatter communication BSC device, and the first information is used to instruct the BSC device to send the first backscatter signal; the first node is based on the target information. Determine the number of the BSC devices; wherein the target information includes at least one of the following: a baseband IQ signal obtained based on the first backscatter signal; second information sent by a third node; Three pieces of information; wherein, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices, and the number of BSC devices is obtained based on the baseband IQ signal. In this way, determining the number of BSC devices based on the baseband IQ signal acquired from the first backscatter signal can reduce the signaling and time overhead required to obtain the number of BSC devices.

Description of the drawings

Figure 1 is a block diagram of a wireless communication system applicable to the embodiment of the present application;

Figure 2 is one of the structural schematic diagrams of a backscatter communication system provided by an embodiment of the present application;

Figure 3 is a schematic diagram of backscatter communication provided by an embodiment of the present application;

Figure 4 is the second structural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 5 is a third structural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 6a is one of the architectural schematic diagrams of a backscatter communication system provided by an embodiment of the present application;

Figure 6b is the second architectural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 6c is the third architectural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 6d is the fourth architectural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 6e is the fifth architectural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 6f is the sixth architectural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 6g is the seventh architectural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 6h is the eighth architectural schematic diagram of a backscatter communication system provided by an embodiment of the present application;

Figure 7 is one of the schematic diagrams of the inventory process in related technologies;

Figure 8 is the second schematic diagram of the inventory process in related technologies;

Figure 9 is one of the flow charts of a method for determining the number of devices provided by an embodiment of the present application;

Figure 10 is the second flow chart of a method for determining the number of devices provided by the embodiment of the present application;

Figure 11 is the third flow chart of a method for determining the number of devices provided by the embodiment of the present application;

Figure 12 is a schematic diagram of a probability value adjustment method provided by an embodiment of the present application;

Figure 13 is one of the structural diagrams of an equipment quantity determining device provided by an embodiment of the present application;

Figure 14 is the second structural diagram of a device quantity determination device provided by an embodiment of the present application;

Figure 15 is the third structural diagram of a device for determining the number of equipment provided by the embodiment of the present application;

Figure 16 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 17 is one of the structural schematic diagrams of an electronic device provided by an embodiment of the present application;

FIG. 18 is a second structural schematic diagram of an electronic device provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of them. Example. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art fall within the scope of protection of this application.

The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances so that the embodiments of the present application can be practiced in sequences other than those illustrated or described herein, and that "first" and "second" are distinguished objects It is usually one type, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects are in an "or" relationship.

It is worth pointing out that the technology described in the embodiments of this application is not limited to Long Term Evolution (LTE)/LTE Evolution (LTE-Advanced, LTE-A) systems, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of this application are often used interchangeably, and the described technology can be used not only for the above-mentioned systems and radio technologies, but also for other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in much of the following description, but these techniques can also be applied to applications other than NR system applications, such as 6th ^generation Generation, 6G) communication system.

Figure 1 shows a block diagram of a wireless communication system to which embodiments of the present application are applicable. The wireless communication system includes a terminal 11 and a network side device 12. The terminal 11 may be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer), or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, or a super mobile personal computer. (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (AR)/virtual reality (VR) equipment, robots, wearable devices (Wearable Device) , vehicle user equipment (Vehicle User Equipment, VUE), pedestrian terminal (Pedestrian User Equipment, PUE), intelligent Home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (PCs), teller machines or self-service machines and other terminal-side devices, wearable devices include: smart watches , smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that the embodiment of the present application does not limit the specific type of the terminal 11. The network side device 12 may include an access network device or a core network device, where the access network device may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function or a wireless access network unit. Access network equipment may include a base station, a Wireless Local Area Network (WLAN) access point or a WiFi node, etc. The base station may be called a Node B, an Evolved Node B (eNB), an access point, a base transceiver station ( Base Transceiver Station (BTS), radio base station, radio transceiver, Basic Service Set (BSS), Extended Service Set (ESS), home B-node, home evolved B-node, transmitting and receiving point ( Transmitting Receiving Point (TRP) or some other appropriate terminology in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that in the embodiment of this application, only in the NR system The base station is introduced as an example, and the specific type of base station is not limited. Core network equipment may include but is not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (PCF), Policy and Charging Rules Function (PCRF), Edge Application Service Discovery function (Edge Application Server Discovery Function, EASDF), Unified Data Management (UDM), Unified Data Repository (UDR), Home Subscriber Server (HSS), Centralized network configuration ( Centralized network configuration (CNC), Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that in the embodiment of this application, only the core network equipment in the NR system is used as an example for introduction, and the specific details of the core network equipment are not limited. type.

In order to better understand the embodiments of the present application, the following technical points are first introduced below.

1. About Backscatter Communication (BSC)

Backscatter communication means that backscatter communication equipment uses radio frequency signals from other devices or the environment to perform signal modulation to transmit its own information. As shown in Figure 2, backscatter communication equipment (BSC equipment) can be:

The BSC device in traditional RFID is generally a tag and belongs to the passive Internet of things (IoT) device (Passive-IoT);

Semi-passive tags have certain amplification capabilities for downlink reception or uplink reflection.

In addition, Tags with active sending capabilities (Active Tags), this type of terminal can send information to the reader (Reader) without relying on reflection of the incident signal.

As shown in Figure 3, it is a schematic diagram of the backscatter communication principle. PA is the power amplifier, LNA is the low noise amplifier, Clock is the clock module, Logic is the logic module, RF harvester is the radio frequency receiver, and Demod is the demodulator. A simple implementation method is that when the Tag needs to send '1', the Tag reflects the incident carrier signal, and when the Tag needs to send '0', it does not reflect.

Backscatter communication equipment controls the reflection coefficient Γ of the circuit by adjusting its internal impedance, thereby changing the amplitude, frequency, phase, etc. of the incident signal to achieve signal modulation. The reflection coefficient of the signal can be characterized as:

Among them, Z ₀ is the antenna characteristic impedance, and Z ₁ is the load impedance. Assuming that the incident signal is S _in (t), the output signal is Therefore, corresponding amplitude modulation, frequency modulation or phase modulation can be achieved by reasonably controlling the reflection coefficient. Typical backscatter communication architectures can be divided into single-base systems and dual-base systems.

1.1 About single base system

Figure 4 shows a single-base backscatter communication system, a typical representative of which is the traditional RFID system, which includes BSC equipment (such as Tag) and readers. The reader/writer includes a Radio Frequency (RF) radio frequency source and a BSC receiver. The RF radio frequency source is used to generate an excitation signal to power the BSC equipment and provide a carrier wave. The excitation signal is usually a continuous wave (Continuous Wave, CW). The BSC device modulates and backscatters CW. The BSC receiving end in the reader receives the backscattered signal and then demodulates the signal. Since the RF source and BSC receiver are in the same device, such as the reader/writer here, it is called a single-base backscatter communication system. In this system, since the excitation signal sent from the BSC equipment will undergo the signal attenuation of the round-trip signal, causing a double far-near effect, the signal energy attenuation is large, so the single-base system is generally used for short-distance backscatter communications, such as Traditional RFID applications.

1.2 Dual base system

As shown in Figure 5, unlike the single-base system, the RF radio frequency source and BSC receiver in the dual-base system are separated. Therefore, the bistatic system avoids the problem of large round-trip signal attenuation. In addition, the performance of the backscatter communication system can be further improved by properly placing the RF source.

2. About the backscatter communication system under cellular network

In cellular networks, backscatter communication systems can be divided into 8 architectures as shown in Table 1 and Figure 6a to Figure 6h, depending on the RF source, uplink, and downlink.

As shown in Table 1, in Architecture 1 shown in Figure 6a, the base station is the RF radio frequency source, and is also the downlink transmitter of the BSC device (ie, the control command sender) and the uplink receiver of the BSC device (ie, the BSC receiver). terminal), that is, the base station communicates directly with the BSC equipment at this time. This deployment architecture has high requirements on the receiving sensitivity of base stations and BSC equipment, but it is simple to deploy.

In Architecture 2 shown in Figure 6b, the base station is also an RF radio frequency source, but at this time there is a relay device (Relay), which is used to relay the uplink from the BSC device to the base station; Relay can also relay the base station to the BSC device. downlink.

In Architecture 3, User Equipment (UE) is used for RF radio frequency source and forwarding downlink and uplink from BSC equipment to the base station.

Architecture 3-1a shown in Figure 6c: the base station is an RF radio frequency source, and the base station directly transmits downlink data to the BSC device; in the uplink, the BSC device first sends the backscattered signal to the UE, and then the UE forwards it to the base station

Architecture 3-1b shown in Figure 6d: UE is the RF radio frequency source, and the base station directly transmits downlink data to the BSC device; in the uplink, the BSC device first sends the backscattered signal to the UE, and then the UE forwards it to the base station

Architecture 3-2a shown in Figure 6e: The base station is the RF radio frequency source. The base station first sends downlink data to the UE. Then the UE forwards it to the BSC device; in the uplink, the BSC device directly sends the backscattered signal to the base station.

Architecture 3-2b shown in Figure 6f: UE is the RF radio frequency source. The base station first sends downlink data to the UE, and then the UE forwards it to the BSC device; in the uplink, the BSC device directly sends backscattered signals to the base station.

Architecture 3-3a shown in Figure 6g: The base station is an RF radio frequency source. The base station first sends downlink data to the UE, and then the UE forwards it to the BSC device; in the uplink, the BSC device sends backscattered signals to the UE, and then the UE forwards to base station

Architecture 3-3b shown in Figure 6h: UE is the RF radio frequency source. The base station first sends downlink data to the UE, and then the UE forwards it to the BSC device; in the uplink, the BSC device sends backscattered signals to the UE, and then the UE forwards to base station

Table 1: Typical architecture of backscatter communication under cellular network

3. About RFID Tag inventory process

RFID is a traditional backscatter communication system. Its main design goal is to identify and read data from BSC devices (i.e. Tags) within the coverage of the reader. Since RFID was initially used in automated inventory of large quantities of goods, the process of tag identification and data reading is also called inventory.

Taking the Electronic Product Code (EPC) C1G2 RFID system defined by the International Organization for Standardization (ISO) 18000-6c as an example, Figure 7 shows a schematic diagram of the inventory process of a Tag. After the reader sends a query command (Query), the Tag responds (Reply). Taking Reply as RN16 as an example, the Tag generates a 16-bit random number and sends it to the reader. Then the reader/writer sends the sequence to the Tag through an Acknowledgment (ACK) command. After the Tag successfully verifies the RN16 in the ACK, it sends subsequent data (such as PC/XPC, EPC, etc.) to the reader/writer. If EPC is valid, use Queryrep or other command if epc is valid; if EPC is invalid, use Negative Acknowledgement (NAK) (NAK if EPC is invalid).

Obviously, there can be multiple or even a large number of Tags within the coverage area of the reader. If the inventory process of a single Tag is directly applied to the scenario of multiple Tags, there will be a problem due to multiple Tags sending backscatter signals at the same time. Signal conflicts and inability to decode. Therefore, in order to adapt to multiple tag scenarios, RFID systems usually have a contention access mechanism to manage conflicts. Similarly, taking the EPC C1G2 RFID system as an example, Figure 8 shows a schematic diagram of the inventory process combined with the competitive access mechanism. The specific process is as follows:

(1) The reader/writer sends a Select command to select the Tag that needs to be inventoried;

(2) The reader/writer sends a query (Query) command to start a round of inventory, and Query indicates a Q value;

(3) All Tags generate a random integer in the range [0, 2Q-1] as the initial value of the counter;

(4) Tag checks whether the counter is 0;

(5a) [If the counter of a Tag is 0] The Tag with a counter of 0 sends a reply (Reply), including a randomly generated 16-bit random number, recorded as RN16;

(6a) [If the reader successfully decodes RN16] the reader sends an ACK command, including the RN16 and the 2bits command field;

(7) Tag receives the ACK and checks whether the RN16 contained in the ACK is the previously sent RN16;

(8a) [If RN16 is correct] Verify that the correct Tag of RN16 sends the data that needs to be reported to the reader, such as PC, XPC, EPC or other data, and the Tag inventory is completed;

(8b) [If RN16 is wrong] The Tag that checks the RN16 error will set its own counter to the maximum value;

(6b) [If the reader fails to decode RN16] the reader sends a NAK command;

(9) If the Tag that received the NAK command sent a Reply in the previous adjacent sequence, its own counter is set to the maximum value;

(5b) [If the counter without Tag is 0] the reader sends a repeat query (QueryRep) command;

(10) The Tag that receives the QueryRep command will reduce its own counter by 1;

(11) [Optional] The reader can send an adjustment query (QueryAdjust) command to reconfigure a Q value;

(12) The Tag that has received the QueryAdjust command and has not completed the inventory will randomly select an integer in the range [0, 2Q-1] as the counter;

Repeat steps (4)-(12) until all Tags are counted.

It should be noted that in order to solve the conflict problem, completing an inventory of all Tags requires a lot of additional signaling and time overhead. For example, Tags need to wait for the counter to reach 0; before Tags send valid data, they need to repeatedly send RN16 until the RN16 Correctly and uniquely recognized by the reader.

4. How to obtain the number of Tags

4.1: Through the inventory process in 3 RFID Tag inventory processes, the information of all Tags within the coverage of the reader can be obtained, including quantity, PC/XPC/EPC, etc.

4.2: Statistics of channel time domain observation results in the RFID inventory process

As can be seen from the RFID Tag inventory process in 3, after the reader sends Query or QueryRep, there may be no Tag to send Reply (that is, the counters of all Tags are not 0), and only one Tag to send Reply (that is, there is only one Tag). The counter is 0), and more than one Tag sends Reply (that is, the counter of more than one Tag is 0). When more than one Tag sends Reply, their signals will conflict with each other, making the reader unable to decode. This is also the traditional inventory process. One of the reasons for inefficiency when reading a large number of tags.

However, based on the received signal strength RSS, the reader is able to distinguish between two situations: the channel is idle (no Tag sends Reply) and busy (at least one Tag sends Reply). After each Tag receives a Query or QueryRep, statistically speaking, the probability of sending a Reply containing RN16 is 2 ^-Q . Therefore, the reader/writer can fix the Q value, then count the number of times the channel is idle and busy after sending Query or QueryRep, and then estimate the total number of Tags according to the following equation:

in, is the estimated number of Tags, K ₁ and K ₂ are the number of idle and busy times respectively.

It should be noted that the choice of Q value is particularly important. When Q is too large or too small, the observations will be biased towards all idle or all busy, making the confidence of the estimation result very low.

In order to solve this problem, time can be divided into multiple longer periods of time, each period of time is called a step. In each step, the Q value is fixed, and the reader counts the number of times the channel is idle and busy after sending Query or QueryRep. If the confidence level of the observation result is low, the reader will adjust the Q value and continue the next observation until the observation result meets the requirements. Generally, the Q value can be set to increase as the number of steps increases.

The device quantity determination method, device and electronic device provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings through some embodiments and application scenarios.

Referring to Figure 9, Figure 9 is a flow chart of a method for determining the number of devices provided by an embodiment of the present application. As shown in Figure 9, the method for determining the number of devices includes the following steps:

Step 101: The first node sends first information to the backscatter communication BSC device, where the first information is used to instruct the BSC device to send a first backscatter signal.

Wherein, the first node may be a base station, a UE or a reader/writer. The reader may be a dedicated reader. The BSC device may be an RFID Tag, or a passive Internet of things (IoT) device, a semi-passive IoT device, or an active IoT device, etc.

Step 102: The first node determines the number of BSC devices based on target information;

Wherein, the target information includes at least one of the following:

A baseband IQ signal obtained based on the first backscattered signal;

the second information sent by the third node;

The third information sent by the third node;

In addition, the third node may be a base station, a UE, a relay or a reader/writer, and the reader/writer may be a dedicated reader/writer. The third node may obtain the baseband IQ signal based on the first backscattered signal sent by the backscatter communication BSC device, and send the second information to the first node; or, the third node may obtain the baseband IQ signal based on the baseband IQ signal. The number of BSC devices sends third information to the first node.

In addition, the third node can receive the first backscattered signal sent by the BSC device at the target signal frequency within the target period, and obtain the baseband IQ signal based on the first backscattered signal; further, the third node can receive the baseband IQ signal based on the first backscattered signal. The baseband IQ signals are clustered, and the number of BSC devices is determined based on the clustering results.

Taking the target information including the second information sent by the third node or the third information sent by the third node as an example, the third node can send the first information in the T ₁ ~ T ₂ + T ₁ + ΔT time after the end of sending the first information. Within, the first backscattered signal is received and measured at frequency _f1 . Among them, ΔT is an optional parameter, and ΔT can be used to indicate the maximum delay for the first backscattered signal of the BSC device to reach the third node. T ₁ is the target time interval, T ₂ is the total time for sending the first backscattered signal, and frequency f ₁ is the target signal frequency of the first backscattered signal.

In addition, the third node can obtain the configuration information of the first backscatter signal through at least one of the following: indication information sent by the first node; first information monitored, the first information is used to Instruct the BSC device to send the first backscatter signal; preset configuration.

In addition, the first node may indicate to the third node the auxiliary information required to determine the number of BSC devices through the eighth information. The auxiliary information may include: the average received power of the historical backscattered signals of the BSC devices; or the third node Default auxiliary information required for determining the first quantity value of the BSC device may be used.

It should be noted that the first node and the third node can be deployed on the same hardware device or on different hardware devices. For example, both the first node and the third node may be electronic devices, such as terminals or network-side devices.

In addition, the above-mentioned BSC device may be a BSC device participating in quantity estimation. should be understood, determined The number of BSC devices may also be referred to as estimating the number of BSC devices.

In addition, the first information can also be used to indicate the configuration information of the first backscattered signal; or the configuration information of the first backscattered signal is preconfigured on the BSC device; or the configuration information of the first backscattered signal can be part of Indicated by the first information, some are pre-configured on the BSC device; etc. This embodiment does not limit this.

In one implementation, the number of BSC devices is obtained based on a clustering result obtained by clustering the baseband IQ signal.

In one implementation, the first node determines the number of BSC devices based on target information, which may include: the first node acquires a baseband IQ signal based on the first backscatter signal sent by the BSC device; the first The node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering result. The first node acquires the baseband IQ signal based on the first backscattered signal sent by the BSC device, which may include: the first node acquires the multiple backscattered signals based on the first backscattered signal sent by the BSC device in multiple rounds of iterations. The baseband IQ signal in the round iteration process; the first node performs clustering processing based on the baseband IQ signal, and determines the number of the BSC devices based on the clustering result, which may include: the first node based on the multiple The baseband IQ signals in the iteration process are clustered, and the sum of the number of devices in the iteration process is determined based on the clustering results; wherein, the number of BSC devices in the iteration process is The sum of the number of devices.

It should be noted that during multiple rounds of iterations, when the clustering results are valid and the number of BSC devices is successfully estimated, the first node can send fourth information to indicate the BSC devices that have sent the first backscattering signal in the previous round of iterations. Remain silent during subsequent phases and do not participate in the rest of the iteration. In addition, after each round of iteration, the first node may re-determine and indicate the configuration information of the first backscattered signal.

In addition, the conditions that trigger the multi-round iteration process to stop iteration include any of the following:

The number of times the clustering results are invalid is greater than or equal to the first preset number of times;

The number of iterations is greater than or equal to the second preset number;

The total iteration time is greater than or equal to the preset time;

The first node receives the preset information.

In one implementation, the clustering result obtained by clustering the baseband IQ signal includes the number of categories K', and the number of BSC devices can be determined by the number of categories K' and the first backscattering The modulation order K of the signal is obtained. For example, the number of BSC devices N _est is:
N _est =log _K (K').

In one implementation, the process of obtaining the number of categories K' may include: constructing sample points: representing the baseband IQ signal as a two-dimensional data sample, and each set of baseband IQ signal record values (instantaneous sampling values) corresponds to one data sample point. ; Remove outliers, such as eliminating data that are too far from the mean; Smooth data, such as taking the average of data sample points at adjacent moments and merging them into one sample point; Obtain the number of categories K of all data sample points through density-based clustering methods '.

It should be noted that if the number of BSC devices is different, the state of the superimposed signal of the received first backscattered signal is different, and the number of categories K' corresponding to the baseband IQ signal is different. For N BSC devices, the modulation order is K, then the total number of states of the superimposed signal is K ^N , and the number of center points corresponding to the clustering result on the two-dimensional plane is K ^N , that is, the number of categories K' is K ^N . The data samples of the baseband IQ signal can be clustered to obtain the center points and the number of center points corresponding to different superimposed signal states.

It should be understood that the IQ signals are in-phase and quadrature signals. I is In-Phase (in-phase), Q is Quadrature (orthogonal). The method of obtaining the baseband IQ signal may include any of the following: sampling the bandpass signal corresponding to the first backscattered signal, performing digital signal processing on the sampling result to obtain the baseband IQ signal; converting the first backscattered signal The corresponding bandpass signal is frequency converted to baseband, and the frequency conversion result is sampled to obtain the baseband IQ signal.

In addition, the sending time of the first backscattered signal may be determined by the BSC device; or the sending time of the first backscattered signal may be determined based on any one of the following: the sixth information sent by the first node; The seventh message sent by the second node. For example, the time slot is used as the time unit for sending the first backscatter signal, and the BSC device can independently decide the start of each time slot; or, the first node sends the sixth information or the second node sends the seventh information to indicate that each time slot The beginning of a time slot.

It should be noted that in the related technology, in the RFID backscatter communication system, the reader can perform a complete inventory process to obtain the number of BSC devices (i.e. Tags) within its coverage; it can also use BSC devices to perform inventory The number of BSC devices is estimated based on the relationship between the dynamic behavior pattern of the transmitted backscattered signal in the process and the statistical value of the channel's time domain observation results. For the former, obtaining the number of BSC devices requires a complete inventory process. When the reader does not need to read other information about the Tag, such as cargo quantity estimation and other application scenarios, running the inventory process to obtain the number of BSC devices will generate unnecessary information. Order and time overhead. For the latter, because the reliability and confidence of the observation results are strictly It relies heavily on the dynamic behavior mode configuration (such as the size of the Q value) of the backscattered signal sent by the BSC device, so an exhaustive search method is needed to obtain the appropriate configuration, resulting in a multiple increase in overhead. At the same time, one observation corresponds to one transmission opportunity of the BSC device (for example, in RFID, the reader sends a Query or QueryRep command), which makes it take a long time to obtain the observation results and lacks the scalability to deal with a large number of BSC devices. Overall, there is still a lack of reliable and efficient BSC equipment quantity estimation methods in the related technology.

It should be understood that the equipment quantity determination method in the embodiment of the present application can be applied to the goods quantity estimation scenario, the BSC equipment is the goods to be estimated, and the quantity of the BSC equipment is the estimated goods quantity. Or the method for determining the number of devices can also be applied to other scenarios of estimating the number of devices, where the BSC device is the device to be estimated, and the number of BSC devices is the estimated number of devices.

The embodiment of this application proposes a device quantity determination method for estimating the number of BSC devices. The number of BSC devices can be inferred by analyzing the superimposed IQ signal generated when the BSC devices simultaneously send backscatter signals. Specifically, the configuration parameters of the BSC equipment and each node participating in the quantity estimation and their indication methods are defined, as well as the signal reception, measurement, processing and analysis methods. Compared with estimating the number of BSC devices through the inventory process, the embodiment of the present application can significantly reduce time overhead and improve estimation efficiency. At the same time, the embodiments of the present application realize dynamic configuration of parameters and iterative operation mode, and can maintain high scalability when dealing with different numbers of devices.

It should be noted that the method for determining the number of devices in the embodiments of this application can be applied to backscatter communication systems, including RFID, LTE, Narrow Band Internet of Things (NB-IoT), NR, electrical and electronic Institute of Electrical and Electronics Engineers (IEEE) 802.11 evolution system, etc.

In this embodiment of the present application, the first node sends the first information to the backscatter communication BSC device, and the first information is used to instruct the BSC device to send the first backscatter signal; the first node is based on the target information. Determine the number of the BSC devices; wherein the target information includes at least one of the following: a baseband IQ signal obtained based on the first backscatter signal; second information sent by a third node; Three pieces of information; wherein, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices, and the number of BSC devices is obtained based on the baseband IQ signal. In this way, determining the number of BSC devices based on the baseband IQ signal acquired from the first backscattered signal can reduce the signaling and time development required to obtain the number of BSC devices. pin.

Optionally, the first information is also used to indicate at least one of the following:

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

The above-mentioned relevant information of the BSC device may include identification information of the BSC device. For example, the relevant information of the BSC device may include a mask for matching content such as ID, EPC, PC/XPC, internal memory specific location content, sensor results, and the like. EPC is the Electronic Product Code (Eletronic Product Code), and PC/XPC is the Protocol Control/Extended Protocol Control (Protocol Control/Extended Protocol Control) information.

It should be understood that the relevant information of the BSC device may be used to indicate the BSC devices participating in the quantity estimation.

In an implementation manner, the BSC devices indicated by the relevant information of the BSC devices may be all BSC devices within the coverage of the first node.

In this embodiment, the first information indicates relevant information of the BSC device, so that the BSC devices participating in the quantity estimation can be indicated through the first information; the first information indicates synchronization information, so that the first information can be aligned through the synchronization information; A piece of information indicates the configuration information of the first backscattered signal, so that the configuration information of the first backscattered signal can be obtained through the first information.

Optionally, the configuration information of the first backscattered signal includes at least one of the following:

Signal power information;

transmitting a dynamic pattern of the first backscattered signal;

Send total time information;

Time appointment information;

Target signal frequency;

The data type for sending the first backscattered signal;

The modulation order for transmitting the first backscattered signal;

Target time interval, the target time interval is the time interval between the BSC device receiving information and sending the first backscatter signal.

The signal power information may be used to indicate the power of the BSC device to send the first backscattered signal. rate p1 or a power-related value such as level, impedance, reflection coefficient, etc. The dynamic pattern of transmitting the first backscattered signal may include a probability of transmitting the signal at a specified time or time slot, a time domain and/or frequency domain pattern of the transmitted signal. Take the dynamic mode including the probability of sending a signal at a specified time or time slot as an example. If the probability is expressed as p, before the start of the specified time or time slot, the BSC device will randomly generate a random number between 0 and 1. If the random number is number <p, then the signal is sent within the specified time or time slot. The total transmission time information may include the total time _T2 or the total number of time slots for the BSC device to transmit the first backscatter signal. The time agreement information may include the definition of the time slot, such as the time slot corresponding to the absolute time length for transmitting one symbol or bit, or the time slot corresponding to the transmission opportunity. The transmission opportunity may refer to transmitting a piece of data of the BSC device. The length may not be fixed until the end of the transmission is the end of the time slot. The transmission opportunity may be triggered by UE autonomous access or by the first node/second node sending additional signaling. The target signal frequency may be the frequency f ₁ at which the BSC device sends the first backscattered signal. The data type for sending the first backscatter signal may include random data that conforms to a specific pattern, and/or data intended to be reported by the BSC device, etc. The modulation order used to send the first backscattered signal may be the modulation order K used by the BSC device to send the first backscattered signal.

In one implementation, the target time interval may be the time interval T1 between the time when the BSC device receives the first information and the time when the first backscatter signal is sent.

Optionally, the synchronization information includes at least one of the following:

pilot signal;

leader sequence information;

System time information;

Delimiter information.

In one implementation, the preamble sequence information may include a preamble sequence. For example, the preamble sequence information may include a Barker sequence, a ZC sequence, or the like.

In one implementation, the system time information may include a system frame number (SFN), a time slot counter, or a time slot number, etc.

In one implementation, the delimiter information may include an end delimiter to facilitate the BSC device to align the end position of the first information.

Optionally, the first information indicates the configuration information of the first backscattered signal in a manner including:

Directly indicate, or indicate one set of multiple sets of configuration information;

and / or

Explicit instructions, or implicit instructions.

In one implementation, the first information may explicitly indicate the configuration information of the first backscattered signal; or the first information may implicitly indicate the configuration information of the first backscattered signal.

The explicit indication may be configuration information that directly indicates the first backscattered signal, and the implicit indication may be configuration information that indirectly indicates the first backscattered signal by indicating associated information.

In one implementation, the first information may directly indicate the configuration information of the first backscattered signal; or the first information may indicate one of multiple preset sets of configuration information as the configuration information of the first backscattered signal. .

Optionally, the first node determines the number of BSC devices based on target information, including:

The first node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering result.

In one embodiment, determining the number of BSC devices based on the clustering results includes: determining the number of BSC devices based on the clustering results when it is determined that the clustering results are valid; wherein, the clustering The conditions for the result to be valid include at least one of the following: the clustering result is a positive integer exponential power of the modulation order corresponding to the first backscattering signal; the category center point of the clustering result satisfies preset characteristics; The characteristics of the baseband IQ signal do not match the noise characteristics.

Wherein, the conditions for the clustering result to be valid include at least one of the following: the clustering result is the positive integer exponential power of the modulation order corresponding to the first backscattering signal; the category center point of the clustering result Meet the preset characteristics; the characteristics of the baseband IQ signal do not match the noise characteristics.

In addition, the clustering result may include the number of categories. For example, when the BSC device adopts second-order modulation, and the number of categories after clustering satisfies 2 ⁿ , the clustering result can be considered valid, and n is any positive integer. The category center point of the clustering result satisfies the preset characteristics. The preset characteristics may be non-pathological characteristics. The pathological characteristics may include: any connection line between the center points on the two-dimensional plane cannot form a regular polygon, the nearest neighbor or the farthest. The distance between two center points is less than or greater than the agreed threshold, etc. The characteristics of the baseband IQ signal do not match the noise characteristics. The noise characteristics may be that the measured average power of the baseband IQ signal is close to the noise power, or the variance of all data samples is close to the noise power.

In one implementation, determining the number of BSC devices based on clustering results includes: The number of BSC devices is determined based on the clustering result and the modulation order corresponding to the first backscattered signal.

In this implementation, the first node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering result. In this way, the baseband IQ obtained through the first backscattered signal The clustering result of the signal determines the number of BSC devices, thereby reducing the signaling and time overhead required to obtain the number of BSC devices.

Optionally, after the first node determines the number of BSC devices based on target information, the method further includes:

The first node sends fourth information to the BSC device, where the fourth information is used to indicate that the BSC device that has sent the first backscatter signal will no longer send backscatter signals.

In this implementation, the first node sends fourth information to the BSC device, and the fourth information is used to indicate that the BSC device that has sent the first backscatter signal will no longer send backscatter signals, so that It can prevent BSC equipment that has completed quantity estimation from participating in the quantity estimation process again, and can estimate the quantity of BSC equipment more accurately.

Optionally, the configuration information of the first backscattered signal is determined based on the reference number of the BSC device.

In this embodiment, the configuration information of the first backscattered signal is determined based on the reference number of the BSC device, so that the first backscattered signal determined by the reference number of the BSC device can be determined. Quantity value can reduce the signaling and time overhead required to obtain the number of BSC devices.

Optionally, the reference number of BSC devices is determined based on at least one of the following:

Historical information of the BSC device stored by the first node or the third node;

The measurement result of the second backscattered signal sent by the BSC device.

Among them, the measurement results can also be called measurement information. The measurement results may include received signal strength RSS, a reference number for estimating the number of BSC devices based on the received signal strength RSS. The RSS may include measurement quantities related to received signal power such as Reference Signal Received Power (RSRP) and/or Reference Signal Received Quality (RSRQ). For example, the BSC device may be instructed to send the second backscattered signal with specified power, time, frequency and other parameters.

For example, the measurement results may include signal quality. Assume that the received power corresponding to the measured signal quality of the first backscattered signal is P ₁ and the historical average received power of BSC devices is P _avg . The reference number of BSC devices can be determined as :N _ref =P ₁ /P _avg .

In this embodiment, the reference number of the BSC device is determined through the historical information of the BSC device stored by the first node or the third node, so that the reference number of the BSC device can be determined relatively quickly; through the The measurement result of the second backscattered signal sent by the BSC device determines the reference number of the BSC device, so that the number of BSC devices can be determined through the backscattered signals sent twice by the BSC device, which can reduce the need to obtain the number of BSC devices. signaling and time overhead.

Optionally, the first backscattered signal is sent based on an excitation signal, the excitation signal being sent by the first node or the second node.

Wherein, the above excitation signal may be a continuous carrier wave CW. The first node may send an excitation signal to the BSC device; or the first node may send fifth information to the second node, instructing the second node to send an excitation signal to the BSC device; or the second node may listen to the first information to obtain the sending excitation. Related configuration of signals, sending excitation signals to BSC equipment.

In this way, the BSC device can use the excitation signal sent by the first node or the second node to send the first backscattered signal according to the configuration information of the first backscattered signal. Therefore, the node that provides the excitation signal and the node that sends the first information (ie, the control command) can be the same node, or they can be different nodes.

Optionally, the excitation signal is sent by the second node based on the fifth information sent by the first node, or the excitation signal is sent by the second node based on the first information monitored, and the The fifth information is used to instruct the second node to send the excitation signal to the BSC device.

It should be noted that the first node and the second node can be deployed on the same hardware device or on different hardware devices. For example, both the first node and the second node may be electronic devices, such as terminals or network-side devices.

In this embodiment, the second node monitors the first information to obtain the relevant configuration for sending the excitation signal, sends the excitation signal to the BSC device, and the BSC device sends the first backscattering signal based on the excitation signal; or, the first node sends the excitation signal to the BSC device. The second node sends fifth information to instruct the second node to send the excitation signal to the BSC device, and the second node sends the excitation signal to the BSC device. The nodes that provide excitation signals and the nodes that send control commands are now separated.

Optionally, the information received by the BSC device is transmitted through at least one of the following signaling:

Target control command, radio resource control (Radio Resource Control, RRC), medium access control (Medium Access Control, MAC) control element (Control Element, CE), downlink control information (Downlink Control Information, DCI), side link control Information (Sidelink Control Information, SCI), physical frame preamble (preamble);

The signaling is carried through at least one of the following:

Target wireless signal waveform, Physical Downlink Shared Channel (PDSCH), Physical Downlink Control Channel (PDCCH), Physical Sidelink Control Channel (PSCCH), Physical Sidelink Shared channel (Physical Sidelink Shared Channel, PSSCH), physical frame.

The information received by the BSC device may include one or more of first information, fourth information, sixth information, and seventh information.

In addition, the target control command may be a dedicated control command. The target wireless signal waveform may be a dedicated wireless signal waveform, for example, a pulse width encoding (Pulse Interval Encoding, PIE) encoded amplitude shift keying (ASK) modulated signal.

Optionally, the interaction information between the first node, the second node and the third node is transmitted through at least one of the following signaling:

RRC, MAC CE, DCI, Uplink Control Information (UCI), SCI;

The signaling is carried through at least one of the following:

PDSCH, Physical Uplink Shared Channel (PUSCH), PDCCH, Physical Uplink Control Channel (PUCCH), PSCCH, PSSCH.

The interactive information between the first node, the second node and the third node may include one or more of second information, third information, fifth information and eighth information.

Referring to Figure 10, Figure 10 is a flow chart of a method for determining the number of devices provided by an embodiment of the present application. As shown in Figure 10, the method for determining the number of devices includes the following steps:

Step 201: The third node obtains the baseband IQ based on the first backscattered signal sent by the BSC device. Signal;

Step 202: The third node sends second information or third information to the first node, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices;

Wherein, the number of BSC devices is obtained based on the baseband IQ signal.

Optionally, before the third node sends the second information or the third information to the first node, the method further includes:

The third node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering result.

Optionally, determining the number of BSC devices based on clustering results includes:

The number of BSC devices is determined based on the clustering result and the modulation order corresponding to the first backscattered signal.

If the clustering result is determined to be valid, determine the number of BSC devices based on the clustering result;

Wherein, the conditions for the clustering result to be valid include at least one of the following:

The clustering result is the positive integer exponential power of the modulation order corresponding to the first backscattered signal;

The category center point of the clustering result satisfies the preset characteristics;

The characteristics of the baseband IQ signal do not match the characteristics of the noise.

Optionally, the third node acquires the baseband IQ signal based on the first backscattered signal sent by the BSC device, including:

The third node receives the first backscattered signal sent by the BSC device on the target signal frequency within the target period;

The third node acquires a baseband IQ signal based on the first backscattered signal.

Optionally, the target period is determined based on the total transmission time information of the first backscatter signal; or

The target period is determined based on the total sending time information of the first backscattered signal and a target time interval. The target time interval is the time between the BSC device receiving the information and sending the first backscattered signal. interval, the first information is used to instruct the BSC device to send the A backscattered signal.

Optionally, the acquisition method of the baseband IQ signal includes any of the following:

Sampling the bandpass signal corresponding to the first backscattered signal, and performing digital signal processing on the sampling result to obtain a baseband IQ signal;

The bandpass signal corresponding to the first backscattered signal is frequency-converted to baseband, and the frequency conversion result is sampled to obtain the baseband IQ signal.

Optionally, before the third node acquires the baseband IQ signal based on the first backscattered signal sent by the BSC device, the method further includes:

The third node obtains the configuration information of the first backscattered signal, and receives the first backscattered signal sent by the BSC device based on the configuration information of the first backscattered signal.

Optionally, the third node obtains the configuration information of the first backscattered signal through at least one of the following:

Instruction information sent by the first node;

The first information monitored, the first information is used to instruct the BSC device to send the first backscatter signal;

Default configuration.

The third node acquires the baseband IQ signal in the multi-round iteration process based on the first backscatter signal sent by the BSC device in the multi-round iteration process;

The third node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering results, including:

The third node performs clustering processing based on the baseband IQ signals in the multi-round iteration process, and determines the sum of the number of devices in the multi-round iteration process based on the clustering results;

Wherein, the number of BSC devices is the sum of the number of devices in the multiple iteration processes.

Optionally, the conditions that trigger the multi-round iteration process to stop iteration include any of the following:

The number of iterations is greater than or equal to the second preset number;

The total iteration time is greater than or equal to the preset time;

The third node receives the preset information.

It should be noted that this embodiment is an implementation of the third node corresponding to the embodiment shown in Figure 9. For its specific implementation, please refer to the relevant description of the embodiment shown in Figure 9. To avoid repeated description, No further details will be given in this embodiment. In this way, determining the number of BSC devices based on the baseband IQ signal acquired from the first backscatter signal can reduce the signaling and time overhead required to obtain the number of BSC devices.

Referring to Figure 11, Figure 11 is a flow chart of a method for determining the number of devices provided by an embodiment of the present application. As shown in Figure 11, the method for determining the number of devices includes the following steps:

Step 301: The BSC device receives the first information sent by the first node, where the first information is used to instruct the BSC device to send a first backscatter signal;

Step 302: The BSC device sends the first backscattered signal, and the first backscattered signal is used to obtain the number of the BSC devices, where the number of BSC devices is obtained based on the baseband IQ signal, so The baseband IQ signal is obtained based on the first backscattered signal.

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Signal power information;

transmitting a dynamic pattern of the first backscattered signal;

Send total time information;

Target signal frequency;

The data type for sending the first backscattered signal;

The modulation order for transmitting the first backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

Optionally, after the BSC device sends the first backscatter signal, the method further includes:

The BSC device receives the fourth information sent by the first node, and the fourth information is used to indicate that the BSC device that has sent the first backscatter signal will no longer send the backscatter signal.

Optionally, the sending time of the first backscattered signal is determined by the BSC device;

Or the sending time of the first backscattered signal is determined based on any of the following:

The sixth information sent by the first node;

The seventh message sent by the second node.

It should be noted that this embodiment is an implementation of the BSC device corresponding to the embodiment shown in Figure 9. For its specific implementation, please refer to the relevant description of the embodiment shown in Figure 9. To avoid repeated explanation, this embodiment The embodiments will not be described again. In this way, determining the number of BSC devices based on the baseband IQ signal acquired from the first backscatter signal can reduce the signaling and time overhead required to obtain the number of BSC devices.

The following describes the method for determining the number of devices in the embodiment of the present application through six specific embodiments:

The following six embodiments are described using two architectures as examples, including a single-base system architecture (for example, the first node, the second node, and the third node are deployed on the same reader/writer) and a decoupled cellular network architecture. (For example, the first node, the second node and the third node are deployed on different devices), and can also be expanded to dual-base system architecture and other cellular network architectures.

Example 1:

In this embodiment, the method for determining the number of devices is applied to a single-base system architecture, and in this embodiment, the first node, the second node and the third node are the same device. The three nodes are reader-writers as an example for description. In addition, this embodiment considers that the reader-writer has stored historical information about the number of BSC devices and the reference value of the number of BSC devices is known. The specific process of this embodiment is as follows:

(1) The reader determines the parameters of the backscattered signal sent by the BSC device;

(1a) The parameters include at least one of the following:

The power p ₁ of the backscattered signal sent by the BSC device or a value related to the power, such as level, impedance, reflection coefficient, etc.;

The dynamic pattern of the backscattered signal transmitted by the BSC device, such as the probability of transmitting the signal at a specified time or time slot, the time domain and/or frequency domain pattern of the transmitted signal;

The total time T ₂ or the total number of time slots for the BSC device to send backscatter signals;

The definition of a time slot, such as a time slot corresponding to the absolute length of time to transmit a symbol or bit, or a time slot corresponding to a transmission opportunity;

The frequency f ₁ at which the BSC device sends backscattered signals;

The time interval T ₁ between the BSC device receiving the command and sending the backscatter signal;

The data type of the backscatter signal sent by the BSC device, such as random data that conforms to a specific pattern, data intended to be reported by the BSC device, etc.;

The BSC device sends the modulation order K of the backscattered signal.

(1b) An example method of determining said parameters is as follows:

For frequency, frequency f ₁ can be the frequency of the excitation signal (such as CW); or it can be different from the frequency of the excitation signal;

For power, p ₁ can be selected as a value that is much larger than the channel noise power corresponding to the frequency (denoted as N ₀ ), for example, let p ₁ =N ₀ +3dB;

For the dynamic mode, define T ₂ or all time slots as one step. The probability that the BSC device sends a backscattered signal within one step is _pa . You can choose _pa ＜＜N _max /N _ref . Among them, N _max is the maximum value supported by the reader and writer that can correctly estimate the number of devices from the baseband IQ signal. Its reference value is N _max =log _K (K _max ), and K _max is the reason why the reader can correctly cluster. The maximum number of categories of two-dimensional data samples constructed from the baseband IQ signal, N _ref is the reference value for the number of BSC devices, where "<<" indicates that it is much less than;

For time slots, the definition of a time slot can be the absolute length of time to transmit a symbol or bit, such as the time required to send 1 bit using On-Off Keying (OOK) modulation; or a transmission opportunity, such as sending a temporary Identification (such as RN16), PC/XPC/EPC and other data packages;

For the total number of time slots, you can take any value, and you can take the maximum value within the maximum acceptable delay range of the reader and writer, which will not be expanded here;

The time interval depends on the BSC equipment capability and is not limited here;

For the data type, depending on whether the data reported by the BSC device needs to be collected at the same time, you can choose Choose to let the BSC device send random data that conforms to a specific pattern (i.e., meaningless data); or, let the BSC device send data intended to be reported;

For the modulation order K, the default is 2nd order modulation (such as OOK modulation), and it can also be other modulation orders, which are not limited here.

(2) The reader/writer sends a command to select and instruct the BSC device to send backscattered signals;

Among them, the BSC device defaults to all BSC devices within the coverage of the reader;

Optionally, the command indicates the matching field and/or matching condition. The BSC device that receives the command will match its own information with the matching field according to the given matching condition. The BSC device that matches successfully will continue to participate in the remaining process;

Optionally, the command instructs the BSC device to send part or all of the configuration of the backscatter signal, that is, the parameters described in step (1a);

Optionally, if the command indicates only part of the configuration or no configuration is indicated, the BSC device adopts the agreed default configuration;

Optionally, the command indicates synchronization information such as preamble sequence, system time information, end delimiter, etc.

(3) The reader/writer sends an excitation signal, such as an excitation signal, to the BSC device.

(4) The BSC device uses the excitation signal in step (3) to send a backscatter signal according to the parameters in step (1a);

Among them, the BSC device can independently determine the start of each time slot; or the reader stops sending the excitation signal before the start of each time slot, sends a command to the BSC device to indicate the start of the time slot, and the BSC device sends an interval of T ₁ Backscattered signal.

(5) The reader/writer receives and measures the backscattered signal to obtain measurement information;

Among them, the reader/writer receiving and measuring the backscattered signal may include:

Sampling and recording the bandpass signal, and obtaining the baseband IQ signal through digital signal processing; or, downconverting the bandpass signal to baseband, sampling and recording the baseband IQ signal;

Optionally, if the frequency f ₁ is the same as the frequency of the excitation signal, the original bandpass signal, and/or the bandpass signal after sampling, and/or the baseband IQ signal before sampling, and/or the baseband IQ signal after sampling can be Interference cancellation is performed to eliminate the interference caused by the excitation signal.

(6) The reader/writer uses the parameters described in step (1a) and the measurement information obtained in step (5), Estimate the number of BSC equipment;

Specifically include:

(6a) Construct sample points: Represent the baseband IQ signal as a two-dimensional data sample, and each set of baseband IQ signal record values (instantaneous sampling values) corresponds to a data sample point;

(6b) Optionally, remove outliers, such as removing data that is too far from the mean;

(6c) Optionally, smooth the data, such as taking the average of data sample points at adjacent moments and merging them into one sample point;

(6d) Obtain the number of categories of all data sample points through density-based clustering method;

(6e) Determine whether the clustering result is legal. If the clustering result is illegal, the BSC device quantity estimation process will fail. Otherwise, continue to step (6f). Among them, the conditions for determining that the clustering result is illegal include at least one of the following:

The first item: The number of categories obtained through step (6d) is not the result of the positive integer power of the modulation order K of the second backscattering signal. For example, when the BSC equipment adopts 2-order modulation, the number of categories after clustering needs to satisfy 2 ⁿ , where n is any positive integer;

The second item: The clustered category center points show ill-posed characteristics, such as any connection of the center points on the two-dimensional plane cannot form a regular polygon, the distance between the nearest or farthest two center points is less than or greater than the agreed threshold, etc. ;

The third item: The measurement information obtained through step (5) only contains noise. For example, the average power of the baseband IQ signal measured through step (5) is close to the noise power, and the variance of all data samples is close to the noise power.

(6f) Obtain the number of BSC devices N _est according to the number of categories K' obtained from the clustering obtained in step (6d) and the modulation order K of the backscattered signal:
N _est =log _K (K')

(7) Optionally, repeat iterative steps (1)-(6) until the conditions are met to stop iteration;

When the clustering result is legal and the number of BSC devices is successfully estimated, the reader sends a command to instruct the BSC devices that have sent backscatter signals in the previous iteration to remain silent in subsequent stages and no longer participate in the remaining process;

The condition for stopping the iteration may be that the number of triggers of the third condition in step (6e) reaches the agreed threshold, that is, the measurement information obtained through step (5) only contains noise reaches the agreed number of times. threshold; or, the number of iterations reaches the agreed threshold; or, the total iteration time reaches the agreed threshold, etc.;

After the iteration stops, the estimated number of all BSC devices is the sum of the estimated BSC device values obtained in each iteration.

Optionally, after each round of iteration, the reader/writer re-determines and indicates the parameters described in step (1a);

For example, reselect _pa so that _pa <<N _max /N' _ref , where N' _ref =N _ref -N _est .

(8) In the above steps, the information or commands sent by the reader to the BSC device can be included in at least one signaling such as dedicated control commands, RRC signaling, MAC CE, DCI, SCI, physical frame preamble, etc., and can be dedicated Wireless signal waveforms (such as PIE-encoded ASK modulated signals), PDSCH, PDCCH, PSCCH, PSSCH, and physical frames are carried in at least one way.

Example 2:

In this embodiment, the method for determining the number of devices is applied to a single-base system architecture, and in this embodiment, the first node, the second node and the third node are the same device. The three nodes are readers and writers as an example to expand the description. In addition, this embodiment considers the reference value of the number of BSC devices unknown to the reader and writer. The specific process of this embodiment is as follows:

Most of the processes in this embodiment are the same as those in Embodiment 1. To avoid redundancy, only the different steps are shown. The different steps are as follows:

Step (1b), modify the description of the third item in step (1b) about the dynamic mode to: for the dynamic mode, define T ₂ or all time slots as one step, and the probability that the BSC device sends the backscatter signal in one step is p _a , you can choose any value in (0, 1) as the default value of p _a , such as 0.5;

Step (7), modify step (7) to: repeat and iteratively execute steps (1)-(6) until the conditions are met to stop iteration;

The condition for stopping the iteration may be that the number of triggers of the third condition in step (6e) reaches an agreed threshold; or the number of iterations reaches an agreed threshold; or the total iteration time reaches an agreed threshold, etc.;

After the iteration stops, the estimated number of all BSC devices is the sum of the estimated BSC device values obtained in each iteration;

After each iteration, the reader re-determines and indicates p _a , as shown in Figure 12, a possible The adjustment method of p _a is as follows:

If the clustering result is illegal and the third condition in step (6e) does not hold, that is, the first case, let p _a = βp _a , where β is a scaling value less than 1 and greater than 0;

If the clustering result is legal and the number of categories is less than the agreed threshold, or the clustering result is illegal and the third condition in step (6e) is true, that is the second case, let p _a =min(αp _a ,1) , where α is a scaling value greater than 1, min(·,·) means taking the smaller of the two values in parentheses;

For the third case except the first and second cases, keep p _a unchanged;

Optionally, the average result of multiple iterations can be used to adjust p _a , which will not be described here.

Example 3:

In this embodiment, the method for determining the number of devices is applied to the cellular system architecture, and in this embodiment, the first node, the second node and the third node are different devices, with the first node being a base station and the second node being The UE and the third node are relays as an example for description. In addition, this embodiment considers that the base station has stored historical information about the number of BSC devices and the reference value of the number of BSC devices is known. The specific process of this embodiment is as follows:

(1) The base station determines the parameters for the backscattered signal sent by the BSC equipment;

(1a) The parameters include at least one of the following:

The frequency f ₁ at which the BSC device sends backscattered signals;

The BSC device sends the modulation order K of the backscattered signal.

(1b) An example method of determining said parameters is as follows:

For frequency, the frequency f ₁ can be the frequency of the excitation signal; or it can be different from the frequency of the excitation signal;

For the dynamic mode, define T ₂ or all time slots as one step. The probability that the BSC device sends a backscattered signal within one step is _pa . You can choose _pa ＜＜N _max /N _ref . Among them, N _max is the maximum value supported by the base station that can correctly estimate the number of devices from the baseband IQ signal. Its reference value is N _max =log _K (K _max ). K _max is the base station that can correctly cluster the number of devices constructed from the baseband IQ signal. The maximum number of categories of two-dimensional data samples, where "<<" indicates that it is much smaller than;

For time slots, the definition of a time slot can be the absolute length of time to transmit a symbol or bit, such as the time required to send 1 bit using OOK modulation; or a transmission opportunity, such as sending a temporary identifier (such as RN16), PC/XPC/ EPC and other data packages;

The total number of time slots can be any value, and the maximum value can be taken within the maximum acceptable delay range of the base station, which will not be expanded here;

Regarding the data type, depending on whether the data reported by the BSC device needs to be collected at the same time, you can choose to let the BSC device send random data that conforms to a specific pattern (i.e., meaningless data); or, let the BSC device send data intended to be reported;

(2) The base station sends a command to select and instruct the BSC device to send backscattered signals;

Among them, the BSC device selects all BSC devices within the base station coverage by default;

Optionally, if the command indicates only part of the configuration, or no configuration is indicated, the BSC device adopts the agreed default configuration;

Optionally, the command indicates synchronization information such as preamble sequence, system time information, end delimiter wait.

(3) The UE listens to the command described in step 2 or the base station instructs the UE to send an excitation signal, such as an excitation signal, to the BSC device.

(4) The BSC device uses the excitation signal in step (3) to send backscattered signals according to the parameters in step (1a).

Among them, the BSC device can independently determine the start of each time slot, or the UE stops sending the excitation signal before the start of each time slot; the base station or the UE sends a command to the BSC device to indicate the start of the time slot, and the BSC device sends the signal at an interval T1 Backscattered signal.

(5) Optionally, the UE instructs the relay to relay some or all of the parameters described in step (1a); or, the relay listens to the command described in step (2) to obtain relevant configurations; or, the relay adopts the agreed configuration.

(6) The relay receives and measures the backscattered signal;

Among them, the relay receives and measures the backscattered signal including:

Sampling and recording the bandpass signal, and obtaining the baseband IQ signal through digital signal processing;

Or, downconvert the bandpass signal to baseband, sample and record the baseband IQ signal;

(7) Base stations and relays collaborate to estimate the number of BSC equipment;

The number of BSC equipment can be estimated through the following two example methods:

the first method:

The relay feeds back the baseband IQ signal described in step (6) to the base station;

The base station estimates the number of BSC devices based on the parameters described in step (1a) and the baseband IQ signal fed back by the relay. The specific method is the same as steps (6a)-(6f) of Embodiment 1, which will not be described again here.

The second method:

The relay estimates the number of BSC devices based on the parameters described in step (1a) and the baseband IQ signal described in step (6). The specific method is the same as steps (6a)-(6f) of Embodiment 1, which will not be described again here;

The relay feeds back the estimated number of BSC devices to the base station;

Wherein, the parameters described in step (1a) can be obtained by the relay monitoring the command described in step (2); or, the base station sends a command to instruct the relay; or, uses an agreed command; or, through the above three methods More than one of them is obtained jointly.

(8) Optionally, repeat iterative steps (1)-(7) until the conditions are met to stop iteration;

(8a) When the clustering result is legal and the number of BSC devices is successfully estimated, the base station sends a command to instruct the BSC devices that have sent backscatter signals in the previous iteration to remain silent in subsequent stages and no longer participate in the remaining process;

(8b) The condition for stopping the iteration may be that the number of triggers of the third condition in step (6e) in Embodiment 1 reaches an agreed threshold; or the number of iterations reaches an agreed threshold; or the total iteration time reaches an agreed threshold, etc. ;

(8c) After the iteration stops, the estimated number of all BSC devices is the sum of the estimated BSC device values obtained in each round of iteration;

(8d) Optionally, after each round of iteration, the base station re-determines and indicates the parameters described in step (1a);

(9) In the above steps, the information or commands sent by the base station to the BSC equipment can be included in at least one signaling such as dedicated control commands, RRC signaling, MAC CE, DCI, SCI, physical frame preamble, etc., and can be included in dedicated wireless signals. Waveforms (such as PIE-encoded ASK modulated signals), PDSCH, PDCCH, PSCCH, PSSCH, and physical frames are carried in at least one way.

(10) In the above steps, the information or commands exchanged between the base station, UE and relay can be included in at least one signaling such as RRC signaling, MAC CE, DCI, UCI, SCI, etc., and can be included in PDSCH, PUSCH, PDCCH , PUCCH, PSCCH and PSSCH are carried in at least one way.

Example 4:

In this embodiment, the method for determining the number of devices is applied to the cellular system architecture, and in this embodiment, the first node, the second node and the third node are different devices, with the first node being a base station and the second node being The UE and the third node are relays as an example for description. In addition, this embodiment considers the reference value of the number of BSC devices unknown to the base station.

Most of the processes in this embodiment are the same as those in Embodiment 3. To avoid redundancy, only the different steps are shown. The different steps are as follows:

Step (1b), the third item of step (1b) is the same as the third item of step (1b) in Embodiment 2.

Step (8), modify step (8) to:

Repeat iterative execution steps (1)-(7) until the conditions are met to stop iteration;

(8b)-(8d) are the same as (8b)-(8d) in Embodiment 3, and will not be described again here.

Example 5:

In this embodiment, the method for determining the number of devices is applied to a single-base system architecture, and in this embodiment, the first node, the second node and the third node are the same device. The three nodes are readers and writers as an example to describe. In addition, this embodiment considers the reference value of the number of BSC devices unknown to the reader and writer, and estimates the reference value of the number of BSC devices through the signal quality of the received backscattered signal. The specific process of this embodiment is as follows:

(1) The reader/writer sends a command to select and instruct the BSC device to send the second backscattered signal;

Optionally, the command instructs the BSC device to send part or all of the configuration of the second backscatter signal, such as duration T ₄ , power p ₂ , time interval T ₅ and frequency f ₂ ;

(2) The reader/writer sends an excitation signal, such as an excitation signal, to the BSC device;

(3) After the command sending in step (1) is completed, the BSC device uses the excitation signal in step (2) to send the second backscattering signal at frequency f ₂ with power p ₂ after an interval T ₅ , and the duration is _T4 ;

(4) The reader/writer measures the signal quality of the second backscattered signal and determines the reference value N _ref for the number of BSC devices;

One method: Assume that the received power corresponding to the signal quality measurement value is P ₁ , and the average received power of BSC devices recorded historically by the reader is P _avg , then the reference value for the number of BSC devices: N _ref =P ₁ /P _avg ;

Alternatively, if f ₂ is the same frequency as the excitation signal, interference from the excitation signal can be considered, for example, let P ₁ =P ₁ -P ₀ , where P ₀ is the interference power caused by the excitation signal.

(5) to (12): In this embodiment, steps (5) to (12) are the same as steps (1) to (8) in Embodiment 1, and will not be described again.

Example 6:

In this embodiment, the method for determining the number of devices is applied to the cellular system architecture, and in this embodiment, the first node, the second node and the third node are different devices, with the first node being a base station and the second node being The UE and the third node are relays as an example for description. In addition, this embodiment considers the reference value of the number of BSC devices unknown to the base station, and estimates the reference value of the number of BSC devices through the signal strength RSS of the received backscattered signal. The specific process of this embodiment is as follows:

(1) The base station sends a command to select and instruct the BSC device to send the second backscattered signal;

(2) The UE listens to the command in step (1) to send an excitation signal to the BSC device, or the base station instructs the UE to send an excitation signal to the BSC device. The excitation signal may be an excitation signal;

(4) Optionally, the UE instructs the relay to relay part or all of the configuration described in step (1); or, relay Monitor the command described in step (1) and obtain relevant configurations; or, the relay adopts the agreed configuration;

(5) The relay measures the signal quality of the second backscattered signal, and the base station and the relay cooperate to determine the reference value N _ref for the number of BSC devices;

The reference value N _ref for the number of BSC equipment can be determined through the following two example methods:

the first method:

The relay feeds back signal quality measurements to the base station;

Assume that the received power corresponding to the signal quality measurement value is P ₁ and the average received power of BSC equipment recorded historically by the base station is P _avg , then the reference value for the number of BSC equipment is: N _ref =P ₁ /P _avg ;

The second method:

Assume that the received power corresponding to the signal quality measurement value is P ₁ , and the average received power of BSC equipment obtained from the relay history is P _avg , then the reference value for the number of BSC equipment: N _ref =P ₁ /P _avg

The relay feeds back N _ref to the base station;

Optionally, if the relay does not store the auxiliary information required to determine the reference value for the number of BSC devices, such as P _avg and P ₀ , the base station can indicate the auxiliary information to the relay.

(6) to (15): In this embodiment, steps (6) to (15) are the same as steps (1) to (10) in Embodiment 3, and will not be described again.

Please refer to Figure 13. Figure 13 is a structural diagram of a device quantity determining device provided by an embodiment of the present application. The first node includes the device quantity determining device. As shown in Figure 13, the device quantity determining device 400 includes:

The first sending module 401 is configured to send first information to the BSC device, where the first information is used to instruct the BSC device to send a first backscatter signal;

Determining module 402, configured to determine the number of BSC devices based on target information;

Wherein, the target information includes at least one of the following:

A baseband IQ signal obtained based on the first backscattered signal;

the second information sent by the third node;

The third information sent by the third node;

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Signal power information;

transmitting a dynamic pattern of the first backscattered signal;

Send total time information;

Time appointment information;

Target signal frequency;

The data type for sending the first backscattered signal;

The modulation order for transmitting the first backscattered signal;

Target time interval, the target time interval is the time interval between the BSC device receiving information and sending the first backscattered signal.

pilot signal;

leader sequence information;

System time information;

Delimiter information.

and / or

Explicit instructions, or implicit instructions.

Optionally, the determining module is specifically used to:

Perform clustering processing based on the baseband IQ signal, and determine the BSC device based on the clustering result. quantity of equipment.

Optionally, the device also includes:

The second sending module is configured to send fourth information to the BSC device, where the fourth information is used to indicate that the BSC device that has sent the first backscatter signal will no longer send backscatter signals.

Target control command, radio resource control RRC, media access control MAC control element CE, downlink control information DCI, side link control information SCI, physical frame preamble;

The signaling is carried through at least one of the following:

Target wireless signal waveform, physical downlink shared channel PDSCH, physical downlink control channel PDCCH, physical secondary link control channel PSCCH, physical secondary link shared channel PSSCH, physical frame.

RRC, MAC CE, DCI, uplink control information UCI, SCI;

The signaling is carried through at least one of the following:

PDSCH, physical uplink shared channel PUSCH, PDCCH, physical uplink control channel PUCCH, PSCCH, PSSCH.

In the device quantity determination device in the embodiment of the present application, the first sending module sends the first information to the BSC device, and the first information is used to instruct the BSC device to send the first backscattering signal; determine The module determines the number of BSC devices based on target information; wherein the target information includes at least one of the following: a baseband IQ signal obtained based on the first backscatter signal; second information sent by a third node; third The third information sent by the node; wherein the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices, and the number of BSC devices is obtained based on the baseband IQ signal. In this way, determining the number of BSC devices based on the baseband IQ signal acquired from the first backscatter signal can reduce the signaling and time overhead required to obtain the number of BSC devices.

The device quantity determining device in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or may be a component in the electronic device, such as an integrated circuit or chip. The electronic device may be a terminal or other devices other than the terminal. For example, terminals may include but are not limited to the types of terminals 11 listed above, and other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., which are not specifically limited in the embodiment of this application.

The equipment quantity determination device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 9 and achieve the same technical effect. To avoid duplication, the details will not be described here.

Please refer to Figure 14. Figure 14 is a structural diagram of a device quantity determination device provided by an embodiment of the present application. The third node includes the device quantity determination device. As shown in Figure 14, the device quantity determination device 500 includes:

The acquisition module 501 is used to acquire the baseband IQ signal based on the first backscatter signal sent by the backscatter communication BSC device;

A sending module 502, configured to send second information or third information to the first node, where the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of BSC devices;

Wherein, the number of BSC devices is obtained based on the baseband IQ signal.

Optionally, the device also includes:

A determination module, configured to perform clustering processing based on the baseband IQ signal, and determine the number of BSC devices based on the clustering result.

Optionally, the determining module is specifically used to:

Clustering processing is performed based on the baseband IQ signal, and the number of BSC devices is determined based on the clustering result and the modulation order corresponding to the first backscattered signal.

Optionally, the determining module is specifically used to:

Perform clustering processing based on the baseband IQ signal, and if the clustering result is determined to be valid, determine the number of BSC devices based on the clustering result;

Optionally, the acquisition module is specifically used to:

Receive the first backscattered signal sent by the BSC device at the target signal frequency within the target period;

A baseband IQ signal is obtained based on the first backscattered signal.

The target period is determined based on the total sending time information of the first backscattered signal and a target time interval. The target time interval is the time between the BSC device receiving the information and sending the first backscattered signal. interval, the first information is used to instruct the BSC device to send the first backscatter signal.

Optionally, the device also includes:

A receiving module, configured to obtain the configuration information of the first backscattered signal, and receive the first backscattered signal sent by the BSC device based on the configuration information of the first backscattered signal.

Instruction information sent by the first node;

Default configuration.

Optionally, the acquisition module is specifically used to:

Obtain the baseband IQ signal in the multi-round iteration process based on the first backscatter signal sent by the BSC device in the multi-round iteration process;

The determination module is specifically used for:

Perform clustering processing based on the baseband IQ signals in the multi-round iteration process, and determine the sum of the number of devices in the multi-round iteration process based on the clustering results;

The number of iterations is greater than or equal to the second preset number;

The total iteration time is greater than or equal to the preset time;

The third node receives the preset information.

In the device quantity determination device in the embodiment of the present application, the acquisition module acquires the baseband IQ signal based on the first backscatter signal sent by the backscatter communication BSC device; the sending module sends the second information or the third information to the first node, The second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices; wherein the number of BSC devices is obtained based on the baseband IQ signal. In this way, determining the number of BSC devices based on the baseband IQ signal acquired from the first backscatter signal can reduce the signaling and time overhead required to obtain the number of BSC devices.

The equipment quantity determination device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 10 and achieve the same technical effect. To avoid duplication, the details will not be described here.

Please refer to Figure 15. Figure 15 is a structural diagram of a device quantity determination device provided by an embodiment of the present application. The BSC device includes the device quantity determination device. As shown in Figure 15, the device quantity determination device 600 includes:

The first receiving module 601 is used to receive the first information sent by the first node, the first information Used to instruct the BSC device to send the first backscatter signal;

Sending module 602, configured to send the first backscattered signal, the first backscattered signal is used to obtain the number of the BSC devices, wherein the number of BSC devices is obtained based on the baseband IQ signal, the A baseband IQ signal is obtained based on the first backscattered signal.

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Signal power information;

transmitting a dynamic pattern of the first backscattered signal;

Send total time information;

Target signal frequency;

The data type for sending the first backscattered signal;

The modulation order for transmitting the first backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

Optionally, the device also includes:

The second receiving module is configured to receive fourth information sent by the first node, where the fourth information is used to indicate that the BSC device that has sent the first backscatter signal will no longer send backscatter signals.

The sixth information sent by the first node;

The seventh message sent by the second node.

In the device quantity determination device in the embodiment of the present application, the first receiving module receives the first information sent by the first node, and the first information is used to instruct the BSC device to send the first backscattering signal; the sending module sends the A first backscattered signal, the first backscattered signal is used to obtain the number of the BSC devices, wherein the number of the BSC devices is obtained based on the baseband IQ signal, and the baseband IQ signal is based on the first backscattered signal. The scattering signal is obtained. In this way, determining the number of BSC devices based on the baseband IQ signal acquired from the first backscatter signal can reduce the signaling and time overhead required to obtain the number of BSC devices.

The equipment quantity determination device provided by the embodiment of the present application can implement each process implemented by the method embodiment in Figure 11 and achieve the same technical effect. To avoid duplication, the details will not be described here.

Optionally, as shown in Figure 16, this embodiment of the present application also provides a communication device 700, which includes a processor 701 and a memory 702. The memory 702 stores programs or instructions that can be run on the processor 701, such as , when the communication device 700 is the first node, when the program or instruction is executed by the processor 701, each step of the above embodiment of the method for determining the number of devices applied to the first node is implemented, and the same technical effect can be achieved. When the communication device 700 is a BSC device, when the program or instruction is executed by the processor 701, each step of the above embodiment of the device quantity determination method applied to the BSC device is implemented, and the same technical effect can be achieved. When the communication device 700 is a third node, when the program or instruction is executed by the processor 701, each step of the above embodiment of the method for determining the number of devices applied to the third node is implemented, and the same technical effect can be achieved.

An embodiment of the present application also provides an electronic device, including a processor and a communication interface, wherein the communication interface is used to: send first information to the BSC device, and the first information is used to instruct the BSC device to send the first Backscatter signal; the processor is configured to: determine the number of the BSC devices based on target information; wherein the target information includes at least one of the following: a baseband IQ signal acquired based on the first backscatter signal; The second information sent by the third node; the third information sent by the third node; wherein, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate indicates the number of BSC devices, which is obtained based on the baseband IQ signal. Alternatively, the processor is configured to: obtain the baseband IQ signal based on the first backscatter signal sent by the backscatter communication BSC device; the communication interface is configured to: send the second information or the third information to the first node, the The second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices; wherein the number of BSC devices is obtained based on the baseband IQ signal. Alternatively, the communication interface is used to: receive the first information sent by the first node, the first information is used to instruct the BSC device to send the first backscatter signal; the communication interface is also used to: send the A first backscattered signal, the first backscattered signal is used to obtain the number of the BSC devices, wherein the number of the BSC devices is obtained based on the baseband IQ signal, and the baseband IQ signal is based on the first backscattered signal. The scattering signal is obtained. This electronic device embodiment corresponds to the above-mentioned device quantity determination method embodiment. Each implementation process and implementation manner of the above-mentioned device quantity determination method embodiment can be applied to this electronic device embodiment, and can achieve the same technical effect.

The above-mentioned electronic device may be a terminal, a server, or a network-side device.

Specifically, FIG. 17 is a schematic diagram of the hardware structure of an electronic device that implements an embodiment of the present application.

The electronic device may be a terminal. The electronic device 800 includes but is not limited to: radio frequency unit 801, network module 802, audio output unit 803, input unit 804, sensor 805, display unit 806, user input unit 807, interface unit 808, memory 809, processor 810, etc. at least some parts of it.

Those skilled in the art can understand that the electronic device 800 may also include a power supply (such as a battery) that supplies power to various components. The power supply may be logically connected to the processor 810 through a power management system, thereby managing charging, discharging, and function through the power management system. Consumption management and other functions. The terminal structure shown in FIG. 17 does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown in the figure, or some components may be combined or arranged differently, which will not be described again here.

It should be understood that in the embodiment of the present application, the input unit 804 may include a graphics processing unit (GPU) 8041 and a microphone 8042. The graphics processor 8041 is responsible for the image capture device (GPU) in the video capture mode or the image capture mode. Process the image data of still pictures or videos obtained by cameras (such as cameras). The display unit 806 may include a display panel 8061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 807 includes a touch panel 8071 and at least one of other input devices 8072 . touch panel 8 071, also known as touch screen. The touch panel 8071 may include two parts: a touch detection device and a touch controller. Other input devices 8072 may include but are not limited to physical keyboards, function keys (such as volume control keys, switch keys, etc.), trackballs, mice, and joysticks, which will not be described again here.

In this embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 801 can transmit it to the processor 810 for processing; in addition, the radio frequency unit 801 can send uplink data to the network side device. Generally, the radio frequency unit 801 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.

Memory 809 may be used to store software programs or instructions as well as various data. The memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required for at least one function (such as a sound playback function, Image playback function, etc.) etc. Additionally, memory 809 may include volatile memory or non-volatile memory, or memory 809 may include both volatile and non-volatile memory. Among them, non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electrically removable memory. Erase programmable read-only memory (Electrically EPROM, EEPROM) or flash memory. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (Synch link DRAM) , SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DRRAM). Memory 809 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

The processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor and a modem processor, where the application processor mainly handles operations related to the operating system, user interface, application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the above modem processor may not be integrated into the processor 810.

Wherein, when the electronic device is the first node:

The radio frequency unit 801 is configured to: send first information to the BSC device, where the first information is used to indicate The BSC device sends a first backscattered signal;

The processor 810 is configured to: determine the number of BSC devices based on target information;

Wherein, the target information includes at least one of the following:

A baseband IQ signal obtained based on the first backscattered signal;

the second information sent by the third node;

The third information sent by the third node;

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Signal power information;

transmitting a dynamic pattern of the first backscattered signal;

Send total time information;

Time appointment information;

Target signal frequency;

The data type for sending the first backscattered signal;

The modulation order for transmitting the first backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

and / or

Explicit instructions, or implicit instructions.

Optionally, the processor 810 is further configured to: perform clustering processing based on the baseband IQ signal, and determine the number of BSC devices based on the clustering result.

Optionally, the radio frequency unit 801 is also configured to send fourth information to the BSC device, where the fourth information is used to indicate that the BSC device that has sent the first backscatter signal no longer sends backscatter signals.

The signaling is carried through at least one of the following:

RRC, MAC CE, DCI, uplink control information UCI, SCI;

The signaling is carried through at least one of the following:

Wherein, when the electronic device is the third node:

The processor 810 is configured to: obtain the baseband IQ signal based on the first backscatter signal sent by the backscatter communication BSC device;

The radio frequency unit 801 is configured to: send second information or third information to the first node, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices;

Wherein, the number of BSC devices is obtained based on the baseband IQ signal.

Optionally, the processor 810 is further configured to determine the number of BSC devices based on the clustering result and the modulation order corresponding to the first backscattered signal.

Optionally, processor 810 is also used to:

Optionally, the radio frequency unit 801 is also configured to: receive the first backscattered signal sent by the BSC device at the target signal frequency within the target period;

The processor 810 is further configured to: obtain a baseband IQ signal based on the first backscattered signal.

Instruction information sent by the first node;

Default configuration.

Optionally, the processor 810 is further configured to: obtain the baseband IQ signal in the multiple rounds of iterations based on the first backscattered signal sent by the BSC device in the multiple rounds of iterations;

The processor 810 is also configured to: perform clustering processing based on the baseband IQ signals in the multiple rounds of iterations, and determine the sum of the number of devices in the multiple rounds of iterations based on the clustering results;

The number of iterations is greater than or equal to the second preset number;

The total iteration time is greater than or equal to the preset time;

The third node receives the preset information.

This electronic equipment embodiment corresponds to the above-mentioned device quantity determination method embodiment. Each implementation process and implementation manner of the above-mentioned device quantity determination method embodiment can be applied to this electronic device embodiment, and can achieve the same technical effect.

An embodiment of the present application also provides an electronic device. The electronic device may be a network side device. As shown in Figure 18, the electronic device 900 includes: an antenna 901, a radio frequency device 902, a baseband device 903, Processor 904 and memory 905. Antenna 901 is connected to radio frequency device 902. In the uplink direction, the radio frequency device 902 receives information through the antenna 901 and sends the received information to the baseband device 903 for processing. In the downlink direction, the baseband device 903 processes the information to be sent and sends it to the radio frequency device 902. The radio frequency device 902 processes the received information and then sends it out through the antenna 901.

The method performed by the electronic device in the above embodiment can be implemented in the baseband device 903, which includes a baseband processor.

The baseband device 903 may include, for example, at least one baseband board on which multiple chips are disposed, as shown in FIG. Program to perform the network device operations shown in the above method embodiments.

The electronic device may also include a network interface 906, which is, for example, a Common Public Radio Interface (CPRI).

Specifically, the electronic device 900 according to the embodiment of the present invention also includes: instructions or programs stored in the memory 905 and executable on the processor 904. The processor 904 calls the instructions or programs in the memory 905 to execute FIG. 14, FIG. 15 or Figure 16 shows the execution method of each module and achieves the same technical effect. To avoid repetition, it will not be described again here.

Embodiments of the present application also provide a readable storage medium. Programs or instructions are stored on the readable storage medium. When the program or instructions are executed by a processor, each process of the above device quantity determination method embodiment is implemented, and can achieve The same technical effects are not repeated here to avoid repetition.

Wherein, the processor is the processor in the terminal described in the above embodiment. The readable storage medium includes computer readable storage media, such as computer read-only memory ROM, random access memory RAM, magnetic disk or optical disk, etc.

An embodiment of the present application further provides a chip. The chip includes a processor and a communication interface. The communication interface is coupled to the processor. The processor is used to run programs or instructions to implement the above embodiment of the method for determining the number of devices. Each process can achieve the same technical effect. To avoid repetition, we will not go into details here.

It should be understood that the chips mentioned in the embodiments of this application may also be called system-on-chip, system-on-a-chip, system-on-chip or system-on-chip, etc.

Embodiments of the present application further provide a computer program/program product. The computer program/program product is stored in a storage medium. The computer program/program product is executed by at least one processor to implement the above device quantity determination method. Each process can achieve the same technical effect. To avoid repetition, it will not be described again here.

Embodiments of the present application also provide a device quantity determination system, including: a first node, a BSC device, and a third node. The first node may be used to perform the device quantity determination method applied to the first node as described above. The BSC device may be configured to perform the above-mentioned steps of the device quantity determination method applied to the BSC device, and the third node may be configured to perform the above-described steps of the device quantity determination method applied to the third node.

Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented with electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each specific application, but such implementations should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, devices and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be described again here.

In the embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the units is only a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, and the indirect coupling or communication connection of the devices or units may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or they may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional unit in each embodiment of the present application can be integrated into one processing unit, Each unit may exist physically alone, or two or more units may be integrated into one unit.

If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of this application. The aforementioned storage media include: U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by controlling relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. The program can be stored in a computer-readable storage medium. During execution, the process may include the processes of the embodiments of each of the above methods. Wherein, the storage medium can be a magnetic disk, an optical disk, a read-only memory (Read-Only Memory, ROM) or a random access memory (Random Access Memory, RAM), etc.

It should be noted that, in this document, the terms "comprising", "comprises" or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article or device that includes a series of elements not only includes those elements, It also includes other elements not expressly listed or inherent in the process, method, article or apparatus. Without further limitation, an element defined by the statement "comprises a..." does not exclude the presence of additional identical elements in a process, method, article or apparatus that includes that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions may be performed, for example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus the necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is better. implementation. Based on this understanding, this application The essence of the technical solution or the part that contributes to the existing technology can be embodied in the form of a computer software product. The computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes a number of instructions. It is used to cause a terminal (which can be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to execute the methods described in various embodiments of this application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings. However, the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Inspired by this application, many forms can be made without departing from the purpose of this application and the scope protected by the claims, all of which fall within the protection of this application.

Claims

A method for determining the quantity of equipment, including:

The first node sends first information to the backscatter communication BSC device, where the first information is used to instruct the BSC device to send a first backscatter signal;

The first node determines the number of BSC devices based on target information;

Wherein, the target information includes at least one of the following:

A baseband IQ signal obtained based on the first backscattered signal;

the second information sent by the third node;

The third information sent by the third node;

Wherein, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices, and the number of BSC devices is obtained based on the baseband IQ signal.
The method according to claim 1, wherein the first information is also used to indicate at least one of the following:

Related information of the BSC device, synchronization information, and configuration information of the first backscattered signal.
The method according to claim 2, wherein the configuration information of the first backscattered signal includes at least one of the following:

Signal power information;

transmitting a dynamic pattern of the first backscattered signal;

Send total time information;

Time appointment information;

Target signal frequency;

The data type for sending the first backscattered signal;

The modulation order for transmitting the first backscattered signal;

Target time interval, the target time interval is the time interval between the BSC device receiving information and sending the first backscatter signal.
The method according to claim 2, wherein the synchronization information includes at least one of the following:

pilot signal;

leader sequence information;

System time information;

Delimiter information.
The method according to claim 2, wherein the manner in which the first information indicates the configuration information of the first backscattered signal includes:

Directly indicate, or indicate one set of multiple sets of configuration information; and/or,

Explicit instructions, or implicit instructions.
The method of claim 1, wherein the first node determines the number of BSC devices based on target information, including:

The first node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering result.
The method of claim 1, wherein after the first node determines the number of BSC devices based on target information, the method further includes:

The first node sends fourth information to the BSC device, where the fourth information is used to indicate that the BSC device that has sent the first backscatter signal no longer sends backscatter signals.
The method of claim 2, wherein the configuration information of the first backscattered signal is determined based on a reference number of the BSC device.
The method of claim 8, wherein the reference number of BSC devices is determined based on at least one of the following:

Historical information of the BSC device stored by the first node or the third node;

The measurement result of the second backscattered signal sent by the BSC device.
The method of claim 1, wherein the first backscattered signal is transmitted based on an excitation signal transmitted for the first node or the second node.
The method according to claim 10, wherein the excitation signal is sent by the second node based on the fifth information sent by the first node, or the excitation signal is sent by the second node based on the monitored The first information is sent, and the fifth information is used to instruct the second node to send the excitation signal to the BSC device.
The method according to any one of claims 1-11, wherein the information received by the BSC device is transmitted through at least one of the following signaling:

Target control command, radio resource control RRC, media access control MAC control element CE, downlink control information DCI, side link control information SCI, physical frame preamble;

The signaling is carried through at least one of the following:

Target wireless signal waveform, physical downlink shared channel PDSCH, physical downlink control channel PDCCH, physical secondary link control channel PSCCH, physical secondary link shared channel PSSCH, physical frame.
The method according to any one of claims 1-11, wherein the interaction information between the first node, the second node and the third node is transmitted through at least one of the following signaling:

RRC, MAC CE, DCI, uplink control information UCI, SCI;

The signaling is carried through at least one of the following:

PDSCH, physical uplink shared channel PUSCH, PDCCH, physical uplink control channel PUCCH, PSCCH, PSSCH.
A method for determining the quantity of equipment, including:

The third node acquires the baseband IQ signal based on the first backscattered signal sent by the BSC device;

The third node sends second information or third information to the first node, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices;

Wherein, the number of BSC devices is obtained based on the baseband IQ signal.
The method according to claim 14, wherein before the third node sends the second information or the third information to the first node, the method further includes:

The third node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering result.
The method of claim 15, wherein determining the number of BSC devices based on clustering results includes:

The number of BSC devices is determined based on the clustering result and the modulation order corresponding to the first backscattered signal.
The method of claim 15, wherein determining the number of BSC devices based on clustering results includes:

If the clustering result is determined to be valid, determine the number of BSC devices based on the clustering result;

Wherein, the conditions for the clustering results to be valid include at least one of the following:

The clustering result is the positive integer exponential power of the modulation order corresponding to the first backscattered signal;

The category center point of the clustering result satisfies the preset characteristics;

The characteristics of the baseband IQ signal do not match the characteristics of the noise.
The method of claim 14, wherein the third node acquires the baseband IQ signal based on the first backscattered signal sent by the BSC device, including:

The third node receives the first backscattered signal sent by the BSC device on the target signal frequency within the target period;

The third node acquires a baseband IQ signal based on the first backscattered signal.
The method of claim 18, wherein the target period is determined based on total transmission time information of the first backscattered signal; or

The target period is determined based on the total sending time information of the first backscattered signal and a target time interval. The target time interval is the time between the BSC device receiving the information and sending the first backscattered signal. interval.
The method according to claim 14, wherein the acquisition method of the baseband IQ signal includes any one of the following:

Sampling the bandpass signal corresponding to the first backscattered signal, and performing digital signal processing on the sampling result to obtain a baseband IQ signal;

The bandpass signal corresponding to the first backscattered signal is frequency-converted to baseband, and the frequency conversion result is sampled to obtain the baseband IQ signal.
The method of claim 14, wherein before the third node acquires the baseband IQ signal based on the first backscattered signal sent by the BSC device, the method further includes:

The third node obtains the configuration information of the first backscattered signal, and receives the first backscattered signal sent by the BSC device based on the configuration information of the first backscattered signal.
The method according to claim 21, wherein the third node obtains the configuration information of the first backscattered signal through at least one of the following:

Instruction information sent by the first node;

The first information monitored, the first information is used to instruct the BSC device to send the first backscatter signal;

Default configuration.
The method according to claim 15, wherein the third node transmits data based on the BSC device. The first backscattered signal is sent to obtain the baseband IQ signal, including:

The third node acquires the baseband IQ signal in the multi-round iteration process based on the first backscatter signal sent by the BSC device in the multi-round iteration process;

The third node performs clustering processing based on the baseband IQ signal, and determines the number of BSC devices based on the clustering results, including:

The third node performs clustering processing based on the baseband IQ signals in the multi-round iteration process, and determines the sum of the number of devices in the multi-round iteration process based on the clustering results;

Wherein, the number of BSC devices is the sum of the number of devices in the multiple iteration processes.
The method according to claim 23, wherein the conditions that trigger the multi-round iteration process to stop iteration include any one of the following:

The number of times the clustering results are invalid is greater than or equal to the first preset number of times;

The number of iterations is greater than or equal to the second preset number;

The total iteration time is greater than or equal to the preset time;

The third node receives the preset information.
A method for determining the quantity of equipment, including:

The BSC device receives the first information sent by the first node, where the first information is used to instruct the BSC device to send a first backscatter signal;

The BSC device sends the first backscattered signal, and the first backscattered signal is used to obtain the number of the BSC devices, wherein the number of the BSC devices is obtained based on a baseband IQ signal, and the baseband IQ A signal is obtained based on said first backscattered signal.
The method according to claim 25, wherein the first information is also used to indicate at least one of the following:

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.
The method according to claim 26, wherein the configuration information of the first backscattered signal includes at least one of the following:

Signal power information;

transmitting a dynamic pattern of the first backscattered signal;

Send total time information;

Target signal frequency;

The data type for sending the first backscattered signal;

The modulation order for transmitting the first backscattered signal;

Target time interval, the target time interval is the time interval between the BSC device receiving information and sending the first backscatter signal.
The method according to claim 26, wherein the synchronization information includes at least one of the following:

pilot signal;

leader sequence information;

System time information;

Delimiter information.
The method according to claim 25, wherein after the BSC device sends the first backscatter signal, the method further includes:

The BSC device receives the fourth information sent by the first node, and the fourth information is used to indicate that the BSC device that has sent the first backscatter signal will no longer send the backscatter signal.
The method of claim 25, wherein the transmission time of the first backscattered signal is determined by the BSC device;

Or the sending time of the first backscattered signal is determined based on any of the following:

The sixth information sent by the first node;

The seventh message sent by the second node.
A device for determining the quantity of equipment. The first node includes the device for determining the quantity of equipment. The device includes:

A first sending module, configured to send first information to the BSC device, where the first information is used to instruct the BSC device to send a first backscatter signal;

A determination module, configured to determine the number of BSC devices based on target information;

Wherein, the target information includes at least one of the following:

A baseband IQ signal obtained based on the first backscattered signal;

the second information sent by the third node;

The third information sent by the third node;

Wherein, the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of the BSC devices, and the number of BSC devices is obtained based on the baseband IQ signal.
A device for determining the quantity of equipment. The third node includes the device for determining the quantity of equipment. The device includes:

An acquisition module, configured to acquire the baseband IQ signal based on the first backscatter signal sent by the backscatter communication BSC device;

A sending module, configured to send second information or third information to the first node, where the second information is used to indicate the baseband IQ signal, and the third information is used to indicate the number of BSC devices;

Wherein, the number of BSC devices is obtained based on the baseband IQ signal.
A device for determining the quantity of equipment. BSC equipment includes the device for determining the quantity of equipment. The device includes:

A first receiving module, configured to receive the first information sent by the first node, where the first information is used to instruct the BSC device to send a first backscatter signal;

A sending module, configured to send the first backscattered signal, the first backscattered signal being used to obtain the number of the BSC devices, wherein the number of BSC devices is obtained based on the baseband IQ signal, the baseband The IQ signal is obtained based on the first backscattered signal.
An electronic device, including a processor and a memory, the memory stores a program or instructions that can be run on the processor, wherein when the program or instructions are executed by the processor, any of claims 1 to 13 is implemented. The steps of the method for determining the number of equipment according to one of the claims; or, when the program or instruction is executed by the processor, the steps of the method for determining the number of equipment according to any one of claims 14 to 24 are implemented; or, When the program or instructions are executed by the processor, the steps of the device quantity determining method according to any one of claims 25 to 30 are implemented.
A readable storage medium on which a program or instructions are stored, wherein when the program or instructions are executed by a processor, the steps of the method for determining the number of devices according to any one of claims 1 to 13 are implemented. , or implement the steps of the equipment quantity determination method as described in any one of claims 14 to 24, or implement the steps of the equipment quantity determination method as described in any one of claims 25 to 30.