WO2024007980A1

WO2024007980A1 - Method and apparatus for determining number of devices, and electronic device

Info

Publication number: WO2024007980A1
Application number: PCT/CN2023/104532
Authority: WO
Inventors: 谭俊杰; 黄伟; 姜大洁; 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: CN117411541A

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 acquiring a first number value of backscatter communication (BSC) devices, wherein the first number value is determined on the basis of first backscatter signals which are sent by the BSC devices; and the first node determining a second number value of the BSC devices, wherein the second number value is determined on the basis of second backscatter signals which are sent by the BSC devices, and configuration information of the second backscatter signals is determined on the basis of the first number value.

Description

Equipment quantity determination method, device and electronic equipment

Cross-references to related applications

This application claims priority to Chinese Patent Application No. 202210799335.9 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 BSC devices within the coverage of the reader. In the RFID backscatter communication system, the reader can obtain the number of backscatter communication (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.

In the first aspect, a method for determining the quantity of equipment is provided, which method includes:

The first node acquires a first quantity value of the backscatter communication BSC device, where the first quantity value is determined based on the first backscatter signal sent by the BSC device;

The first node determines a second quantitative value of the BSC device, wherein the second quantitative value is determined based on a second backscattered signal sent by the BSC device, and the configuration information of the second backscattered signal Determined based on the first quantity value.

In the second aspect, a method for determining the quantity of equipment is provided, which method includes:

The BSC device sends a first backscattered signal, the first backscattered signal being used to determine a first quantity value of the BSC device;

The BSC device sends a second backscattered signal, the second backscattered signal is used to determine a second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is based on the first A quantity value is determined.

In the third aspect, a method for determining the quantity of equipment is provided, which method includes:

The third node determines the sixth information or the seventh information based on the second backscattered signal sent by the BSC device. The configuration information of the two backscattered signals is determined based on a first quantitative value, and the first quantitative value is determined based on the first backscattered signal sent by the BSC device;

The third node sends the sixth information or seventh information to the first node;

Wherein, the sixth information is used to indicate the measurement result of the second backscatter signal, and the seventh information is used to indicate the second quantitative value of the BSC device.

In a fourth aspect, a device for determining the number of devices is provided, the device for determining the number of devices is applied to the first node, and the device includes:

An acquisition module, configured to acquire a first quantitative value of a backscatter communication BSC device, where the first quantitative value is determined based on the first backscatter signal sent by the BSC device;

Determining module, configured to determine a second quantitative value of the BSC device, wherein the second quantitative value is determined based on a second backscattered signal sent by the BSC device, and the configuration information of the second backscattered signal Determined based on the first quantity value.

In a fifth aspect, a device for determining the quantity of equipment is provided, the device for determining the quantity of equipment is applied to BSC equipment, and the device includes:

A first sending module, configured to send a first backscattered signal, where the first backscattered signal is used to determine the first quantitative value of the BSC device;

The second sending module is configured to send a second backscattered signal, the second backscattered signal is used to determine the second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is based on The first quantity value is determined.

In a sixth aspect, a device for determining the number of devices is provided, the device for determining the number of devices is applied to a third node, and the device includes:

The first determination module is configured to determine the sixth information or the seventh information based on the second backscattered signal sent by the BSC device. The configuration information of the second backscattered signal is determined based on the first quantitative value. The value is determined based on the first backscattered signal sent by the BSC device;

A first sending module, configured to send the sixth information or seventh information to the first node;

In a seventh aspect, a communication 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 processor is configured to obtain a first quantitative value of a backscatter communication BSC device, where the first quantitative value is sent based on the BSC device. The first backscattered signal is determined; the processor is further configured to determine a second quantitative value of the BSC device, wherein the second quantitative value is determined based on the second backscattered signal sent by the BSC device, The configuration of the second backscattered signal The setting information is determined based on the first quantity value. Alternatively, the communication interface is used to: send a first backscattered signal, the first backscattered signal is used to determine the first quantitative value of the BSC device; the communication interface is also used to: send a second backscattered signal. The second backscattered signal is used to determine a second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is determined based on the first quantitative value. Alternatively, the communication interface is configured to determine the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, the configuration information of the second backscattered signal is determined based on the first quantitative value, and the third A quantitative value is determined based on the first backscattered signal sent by the BSC device; the communication interface is also used to: send the sixth information or seventh information to the first node; wherein the sixth information is used to Indicates the measurement result of the second backscatter signal, and the seventh information is used to indicate the second quantitative value of the BSC device.

In a ninth aspect, a device quantity determination system is provided, including a BSC device, and at least one of a first node and a third node. The first node can be used to perform the steps of the method described in the first aspect. , the BSC device may be used to perform the steps of the method described in the second aspect, and the third node 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 obtains the first quantitative value of the backscattering communication BSC device, and the first quantitative value is determined based on the first backscattering signal sent by the BSC device; the first node determines The second quantity value of the BSC device, wherein the second quantity value is determined based on the second backscatter signal sent by the BSC device, and the configuration information of the second backscatter signal is based on the first quantity The value is determined. In this way, the first quantity value of the BSC device is determined by the first backscattered signal, and the second quantity value of the BSC device is determined by the second backscattered signal determined by the first quantity value, so that the BSC device can be passed twice. The sent backscattered signal determines the number of BSC devices, which 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 one of the structural diagrams of an equipment quantity determining device provided by an embodiment of the present application;

Figure 13 is the second structural diagram of a device for determining the number of equipment provided by an embodiment of the present application;

Figure 14 is the third structural diagram of a device for determining the number of equipment provided by the embodiment of the present application;

Figure 15 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

Figure 16 is one of the structural schematic diagrams of an electronic device provided by an embodiment of the present application;

FIG. 17 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, but not all of the embodiments. 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-mounted equipment (VUE), pedestrian terminal (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (PC), teller machines or self-service Terminal devices such as mobile phones, 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 device. access network unit. Access network equipment may include base stations, WLAN access points or WiFi nodes, etc. The base stations may be called Node B, Evolved Node B (eNB), Access Point, 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 Receiving Point (TRP) or the above 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 the base station in the NR system is used as an example for introduction. Define the specific type of base station. 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 storage function (Network Repository Function (NRF), Network Exposure Function (NEF), Local NEF (Local NEF, or L-NEF), Binding Support Function (BSF), 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 type of the core network equipment is not limited.

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 usually a tag and is a passive 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 (Power Amplifier), LNA is the low noise amplifier (Low Noise Amplifier), Clock is the clock module, Logic is the logic module, and RF harvester is the radio frequency receiver. , 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 (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 carrier 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 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 directly sends backscattered signals 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 EPC C1G2 RFID system defined by 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 the 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 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 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, containing 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, 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 one of the reasons why the traditional inventory process is inefficient when reading a large number of Tags.

However, based on the received signal strength (RSS), the reader can distinguish between idle (no Tag sends Reply) and busy (at least one Tag sends Reply) situations. 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 obtains a first quantitative value of the backscattering communication BSC device, where the first quantitative value is determined based on the first backscattering signal sent by the BSC device.

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.

In one implementation, the first node may determine the first quantitative value of the BSC device based on the signal quality of the first backscattered signal; the signal quality may include Reference Signal Received Power (RSRP), and/ Or, measurement quantities such as Reference Signal Received Quality (RSRQ).

Step 102: The first node determines a second quantitative value of the BSC device, wherein the second quantitative value is determined based on a second backscattered signal sent by the BSC device, and the second backscattered signal The configuration information is determined based on the first quantitative value.

In one implementation, the first node determines the second quantity value of the BSC device based on the second backscattered signal sent by the BSC device. The first quantitative value may also be called a reference value for the number of BSC devices, and the second quantitative value may also be called an estimated value for the number of BSC devices.

In one implementation, the first node receives the sixth information sent by the third node, and determines the second quantitative value of the BSC device based on the sixth information, where the sixth information is used to indicate the third 2. Measurement results of backscattered signals.

In one implementation, the first node receives the seventh information sent by the third node, and determines the second quantitative value of the BSC device based on the seventh information, where the seventh information is used to indicate the BSC device. The second quantitative value of the BSC device is determined based on the measurement result of the second backscattered signal.

It should be understood that determining the number of BSC devices may also be referred to as estimating the number of BSC devices. The first quantity value of the BSC equipment may also be called a first estimated value of the BSC equipment, or a reference value of the quantity of BSC equipment. The second quantity value of the BSC device may also be referred to as a second estimated value of the BSC device.

In one implementation, the above-mentioned BSC device may be a BSC device participating in quantity estimation.

In addition, the sending time of the second backscattered signal may be determined by the BSC device; or the sending time of the second backscattered signal may be determined based on any one of the following: the eighth information sent by the first node; The ninth message sent by the second node. For example, the time slot is used as the time unit for sending the second backscatter signal, and the BSC device can independently decide the start of each time slot; or, the first node sends the eighth information or the second node sends the ninth 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 can be applied to a goods quantity estimation scenario, the BSC equipment is the goods to be estimated, and the second quantity value 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 second quantity value of the BSC device is the estimated number of devices.

Optionally, before the first node obtains the first quantitative value of the BSC device, the method further includes:

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

It should be noted that 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 of the first backscattered signal The information may be partly indicated by the first information, and partly pre-configured on the BSC device; etc. This embodiment does not limit this.

In this embodiment, the first node sends the first information to the BSC device, instructing the BSC device to send the first backscattered signal, so that the first backscattered signal of the BSC device can be determined. The first quantitative value determines the configuration information of the second backscattered signal, and further determines the second quantitative value of the BSC device through the second backscattered signal.

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 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. .

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:

Send duration;

Signal power information;

first signal frequency;

The first time interval is the time interval between the BSC device receiving information and sending the first backscattered signal.

The transmission duration T ₁ may be used to indicate the duration for which the BSC device sends the first backscatter signal. The signal power information may be used to instruct the BSC device to send the power p ₁ of the first backscattered signal or power-related information, such as level, impedance, reflection coefficient, etc. The first signal frequency f ₁ may be used to indicate the frequency at which the BSC device sends the first backscattered signal. The first time interval T ₂ may be used to indicate the time interval during which the BSC device receives the first information and sends the first backscattered signal.

It should be noted that the first information may indicate some or all of the transmission duration, signal power information, first signal frequency and first time interval. For example, the first information may indicate part of the transmission duration, signal power information, first signal frequency, and first time interval, and other information other than this part is preconfigured or configured by default on the BSC device.

Optionally, the first backscattered signal is sent based on a first excitation signal, which is sent by the first node or the second node; and/or

The second backscattered signal is transmitted based on a second excitation signal transmitted by the first node or the second node.

Wherein, the above-mentioned first excitation signal may be a first continuous carrier wave CW. The first node may send the first excitation signal to the BSC device; or the first node may send second information to the second node, instructing the second node to send the first excitation signal to the BSC device; or the second node may monitor the first The information acquires the relevant configuration for sending the first excitation signal, and sends the first excitation signal to the BSC device.

It should be noted that the second node may be a base station, a UE, a relay or a reader/writer, and the reader/writer may be a dedicated reader/writer. In addition, the BSC device may use the first 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 first excitation signal and the node that sends the first information (ie, the control command) may be the same node, or they may be different nodes.

The above-mentioned second excitation signal may be a second continuous carrier wave CW. The first node may send a second excitation signal to the BSC device; or the first node may send information to the second node, instructing the second node to send a second excitation signal to the BSC device; or the second node may monitor the fifth information acquisition Send the relevant configuration of the second excitation signal, and send the second excitation signal to the BSC device.

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

Optionally, before the first node obtains the first quantitative value of the backscatter communication BSC device, the method further includes:

The first node sends second information to the second node, and the second information is used to instruct the second node to send the first 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 implementation, the first node sends second information to the second node, instructing the second node to send the first excitation signal to the BSC device. In this way, the node that provides the first excitation signal and The node that sends the first information (that is, the control command) is a different node, thereby realizing the separation of the node that provides the excitation signal and the node that sends the control command.

Optionally, the first excitation signal is sent by the second node based on the first information heard, and/or the second excitation signal is sent by the second node based on the fifth information heard.

In this way, the second node monitors the first information to obtain the relevant configuration for sending the first excitation signal, sends the first excitation signal to the BSC device, and the BSC device sends the first backscattering signal based on the first excitation signal; the second node monitors the fifth The information acquires the relevant configuration for sending the second excitation signal, sends the second excitation signal to the BSC device, and the BSC device sends the second backscattering signal based on the second excitation signal.

Optionally, the first node obtains the first quantitative value of the BSC device, including:

The first node receives the first backscattered signal sent by the BSC device and measures the signal quality of the first backscattered signal;

The first node determines a first quantity value of the BSC device based on the signal quality of the first backscattered signal.

The signal quality may include measurement quantities such as RSRP and/or RSRQ. For example, the signal quality may include received power. Assuming 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 first number of BSC devices may be determined. Value: N _ref =P ₁ /P _avg .

In this implementation, the first node receives the first backscattered signal sent by the BSC device and measures the signal quality of the first backscattered signal. The first node is based on the first backscattered signal. The signal quality of the backscattered signal determines the first quantitative value of the BSC device. In this way, the first node measures the signal quality of the first backscattered signal and determines the first quantitative value of the BSC device, thereby determining the BSC device. the second quantitative value.

Optionally, the first node obtains the first quantitative value of the backscatter communication BSC device, including:

The first node receives the third information sent by the third node, and obtains the first quantitative value of the BSC device based on the third information, where the third information is used to indicate the signal quality of the first backscattered signal. ;or

The first node receives fourth information sent by the third node, where the fourth information is used to indicate the first quantitative value of the BSC device.

Wherein, 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 determine third information or fourth information based on the first backscattered signal sent by the BSC device. The third node may receive the first backscattered signal sent by the BSC device and measure the signal quality of the first backscattered signal, and the third node may receive a signal based on the first backscattered signal. Quality determines the third or fourth information.

In one implementation, the third node receives and measures the signal quality of the first backscattered signal at frequency f ₁ within the time period T ₂ to T ₂ +T ₁ +ΔT after the first information is sent. 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 ₂ is the first time interval, T ₁ is the transmission duration of the first backscattered signal, and frequency f ₁ is the first signal frequency of the first backscattered signal.

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.

It should be noted that the third node may receive the first backscattered signal sent by the BSC device and measure the signal quality of the first backscattered signal. The third node may feed back the signal quality of the first backscattered signal to the first node through the third information, and the first node determines the first quantitative value of the BSC device based on the signal quality of the first backscattered signal fed back by the third node; Alternatively, the third node may determine the first quantitative value of the BSC device based on the signal quality of the first backscattered signal, and feed back the first quantitative value of the BSC device to the first node through fourth information.

In addition, the third node may 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; and preset configuration. The preset configuration may be a pre-agreed default configuration.

In addition, before the first node receives the fourth information sent by the third node, the first node may indicate to the third node through the tenth information the auxiliary information required to determine the first quantitative value of the BSC device, and the auxiliary information may Including: the average received power of the backscattered signal of the BSC device in historical records; or the third node can use default auxiliary information required to determine the first quantity value of the BSC device.

Optionally, after the first node obtains the first quantitative value of the BSC device, the method further includes:

The first node sends fifth information to the BSC device, where the fifth information is used to indicate to the BSC device The second backscattered signal is transmitted.

Wherein, the first node may determine the configuration information of the second backscattered signal according to the first quantity value of the BSC device, and send the fifth information to the BSC device.

In this embodiment, the first node sends fifth information to the BSC device, instructing the BSC device to send the second backscatter signal, so that the second backscatter signal of the BSC device can be determined. quantity value.

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

Synchronization information;

Configuration information of the second backscattered signal.

It should be noted that the fifth information may explicitly indicate the configuration information of the second backscattered signal; or the fifth information may implicitly indicate the configuration information of the second backscattered signal. For example, the fifth information may indicate one set of the preset plurality of sets of configuration information as the configuration information of the second backscattered signal.

In this embodiment, the fifth information indicates synchronization information, so that the fifth information can be aligned through the synchronization information; the fifth information indicates the configuration information of the second backscattered signal, so that the second backscattered signal can be obtained through the fifth information configuration information.

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

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

Time appointment information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

The second time interval is the time interval between the BSC device receiving information and sending the second backscattered signal.

The signal power information may be used to instruct the BSC device to send the power p ₂ of the second backscattered signal or a power-related value, such as level, impedance, reflection coefficient, etc. The dynamic pattern of transmitting the second 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 T ₄ or the total number of time slots for the BSC device to transmit the second 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 second signal frequency may be the frequency f ₂ at which the BSC device transmits the second backscattered signal. The data type used to send the second backscatter signal may include a specified sequence, random data conforming to a specific pattern, and/or BSC Data reported by the device intention, etc. The second time interval may be a time interval T ₅ during which the BSC device receives the fifth information and sends the second backscattered signal.

It should be noted that the fifth information may indicate signal power information, a dynamic mode for transmitting the second backscattered signal, total transmission time information, time appointment information, second signal frequency, data type for transmitting the second backscattered signal, Transmitting a modulation order of the second backscattered signal, part or all of the second time interval. For example, the fifth information may indicate part of the above information, and other information other than this part is preconfigured or configured by default on the BSC device.

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 or the fifth information.

Optionally, the second quantitative value is obtained based on the measurement result of the second backscatter signal, and the measurement result includes at least one of the following:

Instantaneous value of signal quality;

Statistical value of signal quality;

There is temporal information of the backscattered signal;

There is no time information for the backscattered signal;

Baseband IQ signal.

Wherein, the instantaneous value of the signal quality of the second backscattered signal can be measured and recorded to obtain the instantaneous value of the signal quality. The statistical value of the signal quality of the second backscattered signal can be measured and recorded to obtain the statistical value of the signal quality. The statistical value can include at least one of the following: average value, sliding average value, maximum value, minimum value, etc. The time information of the existence of the backscattered signal may include at least one of the following: a time stamp of the existence of the backscattered signal; an absolute length of time that the backscattered signal exists; the number of time slots in which the backscattered signal exists; the backscattered signal The total time it exists; where the presence of backscattered signals can also be called a busy channel. The time information when the backscatter signal does not exist may include the time stamp when the backscatter signal does not exist; the absolute length of time when the backscatter signal does not exist; the number of time slots when the backscatter signal does not exist; the time when the backscatter signal does not exist; The proportion of the total time; the absence of backscattered signals can also be called the channel idle. The IQ signal is an in-phase or quadrature signal, I represents in-phase (ie In-Phase), and Q represents quadrature (ie Quadrature). The acquisition method of the baseband IQ signal may include any of the following: sampling and recording the bandpass signal, obtaining the baseband IQ signal through digital signal processing; downconverting the bandpass signal to baseband, sampling and recording the baseband IQ signal.

In one implementation, the second quantity value of the BSC device is:

Among them, K ₁ is the number of time slots when the channel is busy, K ₂ is the number of time slots when the channel is idle, and p _a represents the probability of each BSC device sending a signal in each time slot or transmission opportunity.

Optionally, whether the backscatter signal exists is determined based on a comparison result of the instantaneous value or statistical value of the signal quality with a preset threshold.

The preset threshold may be auxiliary information required to determine the second quantitative value of the BSC device. The preset threshold can be obtained in any of the following ways: directly obtained through historical records; inserting an additional stage at any time position in the frame of this cycle for threshold estimation; and obtaining the threshold at any time outside this cycle.

Optionally, the first node determines the second quantitative value of the BSC device, including:

The first node receives the second backscattered signal sent by the BSC device, and measures the second backscattered signal to obtain a measurement result;

The first node determines a second quantity of the BSC device based on the measurement of the second backscattered signal.

The first node receives sixth information sent by the third node, and determines a second quantitative value of the BSC device based on the sixth information, where the sixth information is used to indicate the second backscattered signal. measurement results; or

The first node receives seventh information sent by the third node, the seventh information is used to indicate a second quantitative value of the BSC device, and the second quantitative value of the BSC device is based on the second backscattered signal. The measurement results are confirmed.

Wherein, the third node may determine sixth information based on the second backscattered signal sent by the BSC device, and the first node determines the second quantitative value of the BSC device based on the sixth information. The third node may determine sixth information or seventh information based on the second backscattered signal sent by the BSC device. The third node may receive the second backscattered signal sent by the BSC device, measure the second backscattered signal, and obtain a measurement result of the second backscattered signal. The third node may feed back the measurement result of the second backscatter signal to the first node, and the first node determines the third node of the BSC device based on the measurement result of the second backscatter signal fed back by the third node. Two quantitative values; alternatively, the third node may determine the second quantitative value of the BSC device based on the measurement result of the second backscatter signal, and feed back the second quantitative value of the BSC device to the first node.

In one implementation, the third node receives and measures the second response within the time period T ₅ ~T ₅ +T ₄ +ΔT after the end of sending the fifth information, or within a specified number of time slots starting from T ₅ scattering signal. Among them, △T is an optional parameter, corresponding to the maximum delay for the backscattered signal of the BSC equipment to reach the third node. T ₅ is the second time interval, and T ₄ is the total time for the BSC device to send the second backscatter signal.

In addition, the third node may obtain the configuration information of the second backscatter signal through at least one of the following: indication information sent by the first node; fifth information monitored; and preset configuration. The preset configuration may be a pre-agreed default configuration.

In addition, before the first node receives the seventh information sent by the third node, the first node may pass the eleventh The information indicates to the third node the auxiliary information required to determine the second quantity value of the BSC device. The auxiliary information may include: the average received power of the historically recorded backscattered signal of the BSC device; or the third node may adopt a default value for Auxiliary information required to determine the second quantity value of the BSC device.

Optionally, the method of indicating the configuration information of the first backscattered signal through the first information, and/or the method of indicating the configuration information of the second backscattered signal through the fifth information includes:

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

and / or

Explicit instructions, or implicit instructions.

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

In one implementation, the fifth information may directly indicate the configuration information of the second backscattered signal; or the fifth information may indicate one of a plurality of preset sets of configuration information as the configuration information of the second backscattered signal. .

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), media 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 side link Shared channel (Physical SideLink Shared Channel, PSSCH), physical frame.

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.

In one implementation, the first information, fifth information, eighth information and ninth information may be included in at least one signaling such as dedicated control command, RRC signaling, MAC CE, DCI, SCI, physical frame preamble, etc., It can be carried by at least one of dedicated wireless signal waveforms (such as PIE-encoded ASK modulated signals), PDSCH, PDCCH, PSCCH, PSSCH, and physical frames.

In an implementation manner, the second information, the third information, the fourth information, the sixth information, the seventh information, the tenth information, and the eleventh information may be included in RRC signaling, MAC CE, DCI, UCI, SCI At least one kind of signaling can be carried by at least one of PDSCH, PUSCH, PDCCH, PUCCH, PSCCH and PSSCH.

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 BSC device sends a first backscattered signal, and the first backscattered signal is used to determine the first quantitative value of the BSC device;

Step 202: The BSC device sends a second backscattered signal, the second backscattered signal is used to determine a second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is based on The first quantity value is determined.

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

The BSC device receives the first information sent by the first node, and the first information is used to instruct the BSC device to send the first backscatter signal.

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Send duration;

Signal power information;

first signal frequency;

The second backscattered signal is transmitted based on a second excitation signal, which is transmitted by the first node or the second node.

Optionally, before the BSC device sends the second backscatter signal, the method further includes:

The BSC device receives fifth information sent by the first node, and the fifth information is used to instruct the BSC device to send the second backscatter signal.

Synchronization information;

Configuration information of the second backscattered signal.

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

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

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

The eighth message sent by the first node;

The ninth 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, the first quantity value of the BSC device is determined by the first backscattered signal, and the second quantity value of the BSC device is determined by the second backscattered signal determined by the first quantity value, so that the BSC device can be passed twice. The sent backscattered signal determines the number of BSC devices, which 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 third node determines the sixth information or the seventh information based on the second backscattered signal sent by the BSC device. The configuration information of the second backscattered signal is determined based on the first quantitative value. Determined based on the first backscattered signal sent by the BSC device;

Step 302: The third node sends the sixth information or seventh information to the first node;

Optionally, the third node determines the sixth information or the seventh information based on the second backscattered signal sent by the BSC device. Before the information, the method also includes:

The third node determines third information or fourth information based on the first backscattered signal sent by the BSC device;

The third node sends the third information or fourth information to the first node;

Wherein, the third information is used to indicate the signal quality of the first backscattered signal, and the fourth information is used to indicate the first quantitative value of the BSC device.

Optionally, the third node determines the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, including:

The third node receives the second backscattered signal sent by the BSC device, and measures the measurement result of the second backscattered signal;

The third node determines sixth information or seventh information based on the measurement result of the second backscatter signal.

Optionally, the third node determines third information or fourth information 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 and measures the signal quality of the first backscattered signal;

The third node determines third information or fourth information based on the signal quality of the first backscattered signal.

Optionally, the third node obtains the configuration information of the second backscattered signal and/or 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 fifth information monitored;

Default configuration.

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, the first quantity value of the BSC device is determined by the first backscattered signal, and the second quantity value of the BSC device is determined by the second backscattered signal determined by the first quantity value, so that the BSC device can be passed twice. The sent backscattered signal determines the number of BSC devices, which can reduce the signaling and time overhead required to obtain the number of BSC devices.

The method for determining the number of devices in the embodiment of this application is described below through four specific embodiments:

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 description takes the three nodes as readers and writers as an example. 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 first backscattered signal;

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

Optionally, the command indicates a matching field and/or a matching condition, and the BSC device that receives the command performs the processing according to the matching field and/or Or match its own information with matching conditions, and the successfully matched BSC device 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 first backscatter signal, such as duration T ₁ , power p ₁ , time interval T ₂ and frequency f ₁ ;

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.

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

(3) The BSC device participating in the quantity estimation (hereinafter referred to as BSC device by default in this embodiment without causing ambiguity), after the completion of sending the command in step (1), after the interval T ₂ , on the frequency f ₁ The excitation signal in step (2) is used to send the first backscattered signal with power p ₁ for a duration of T ₁ .

(4) The reader/writer measures the signal quality of the first backscattered signal and determines the quantity reference value N _ref of the BSC equipment;

One determination method: Assume that the received power corresponding to the measured signal quality of the first backscattered signal is P ₁ , and the average received power of the BSC device recorded historically by the reader is P _avg , it can be determined: N _ref =P ₁ /P _avg ;

If f ₁ has the same frequency as the excitation signal, the interference from the excitation signal can be considered to remove the interference from the excitation signal. For example, let P ₁ =P ₁ -P ₀ , where P ₀ is the interference power caused by the excitation signal, and the interference For the method of obtaining power P ₀ , please refer to step (9b).

(5) The reader/writer determines the configuration of the BSC device to send the second backscattered signal based on N _ref ;

(5a) The configuration of the second backscattered signal includes but is not limited to:

The power p ₂ of the second 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 second 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 ₄ or the total number of time slots for the BSC device to send the second backscattered signal;

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 ₂ at which the BSC device sends the second backscattered signal;

The time interval T ₅ between the BSC device receiving information and sending the second backscattered signal;

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

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

(5b) An example method of obtaining the configuration of the second backscattered signal is as follows:

For frequency f ₂ , frequency f ₂ can adopt the frequency of the excitation signal; or it can be the same as f ₁ ; or it can adopt other frequencies that are different from the frequencies of f ₁ and the excitation signal;

For the power p ₂ of the second backscattered signal, p ₂ can be selected as a value that is much larger than the channel noise power (denoted as N ₀ ) corresponding to the frequency f ₂ , for example, let p ₂ =N ₀ +3dB;

For the dynamic mode of the second backscattered signal, one design goal is to make the probability of busy and idle channels basically the same, that is make Among them, p _a represents each BSC device in each The probability of transmitting a signal in a time slot or transmission opportunity;

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; it can also be a transmission opportunity, such as BSC The device sends a temporary identification (such as RN16), PC/XPC/EPC and other data packets;

The total number of time slots for sending the second backscattered signal can be any value, and the maximum value can be taken within the maximum acceptable delay range of the reader and writer, which will not be expanded here;

For the time interval T ₅ for sending the second backscatter signal, reference can be made to the value of T ₂ ;

For the data type to send the second backscatter signal, one way to determine is: when the total time for the acceptable quantity estimate is short, you can choose to let the BSC device send a specific sequence of a specified length or random data that conforms to a specific pattern; vice versa; , when the total acceptable quantity estimation time is long and the BSC device has data that needs to be reported, you can choose to let the BSC device send the data intended to be reported; for the rest of the cases, you can choose arbitrarily;

As for the modulation order K for transmitting the second backscattered signal, the default is 2nd order modulation (such as OOK modulation), and it can also be other modulation orders, which are not limited here.

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

This command indicates part or all of the configuration described in step (5a);

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

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

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

(8) After the command sending in step (6) is completed, the BSC device uses the excitation signal in step (7) to send the second backscattering signal according to the configuration in (5a);

Among them, the BSC device can independently determine the start of each time slot; or, the reader sends a command to the BSC device to indicate the start of the time slot before the start of each time slot, and the BSC device sends an interval of T ₅ after receiving the command. Second backscattered signal.

(9) The reader receives and measures the second backscattered signal, and determines the estimated number of BSC devices N _est ;

One way to determine the BSC equipment quantity estimate N _{est is} as follows:

Record the average power of the received signal on each time slot, and compare it with the preset threshold. If it is greater than the preset threshold, the time slot is recorded as busy, otherwise it is idle; the number of busy and idle time slots on the channel is recorded as K ₁ and K ₂ ;

If the frequency f ₂ is different from the frequency of the excitation signal, the preset threshold can be selected as the channel noise power N ₀ ; if the frequency f ₂ is the same as the frequency of the excitation signal, the preset threshold can be selected as the channel noise power N ₀ and The sum of self-interference power P ₀ ;

Among them, N ₀ and P ₀ are auxiliary information, which can be directly obtained through historical records and other means; or, insert additional stage estimates N ₀ and P ₀ at any time position in the frame of this cycle; or, outside this cycle Estimate N ₀ and P ₀ at any time;

The method to obtain the self-interference power P ₀ is as follows:

Method 1: The reader does not send an excitation signal, measures the received signal power, and obtains the channel noise power N ₀ ; then sends an excitation signal and instructs the BSC device not to transmit a signal, measures the received signal power, and obtains the channel noise power and self-interference The sum of interference powers N ₀ +P ₀ ; the self-interference power P ₀ can be obtained by subtracting the two values;

Method 2: The reader sends an excitation signal and instructs the BSC device not to send a signal, measures the received signal power, and obtains the sum of channel noise power and self-interference power N ₀ +P ₀ ;

The estimated number of BSC equipment N _est can be:

(10) 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 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. 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 first backscattered signal;

Among them, the BSC equipment defaults to all BSC equipment within the coverage of the base station;

Optionally, the command indicates a matching field and/or matching condition. The BSC device that receives the command will match its own information based on the matching field and/or matching condition. The BSC device that matches successfully will continue to participate in the remaining processes;

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

(2) The UE listens to the command in step (1) and sends an excitation signal, such as CW, to the BSC device, or receives an instruction from the base station to send an excitation signal to the BSC device;

(3) After the BSC device participating in the quantity estimation (hereinafter referred to as the BSC device by default in this embodiment without causing ambiguity) completes the sending of the command in step (1), after the interval T ₂ , at the frequency f ₁ , using the excitation signal in step (2) to send the first backscattered signal with power p ₁ for a duration of T ₁ ;

(4) Optionally, the UE indicates to the relay part or all of the configuration of the first backscattered signal in step (1); or, the relay listens to the command in step (1) and/or in step (2) instructions to obtain relevant configurations; or, the relay adopts the agreed configuration.

(5) The relay measures the signal quality of the first 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:

method 1:

The relay feeds back the signal quality of the first backscattered signal to the base station;

Assuming that the received power corresponding to the measured signal quality is P ₁ and the average received power of the BSC equipment recorded historically by the base station is P _avg , it can be determined that N _ref =P ₁ /P _avg ;

In particular, if f ₁ has the same frequency as the excitation signal, the interference from the excitation signal can be considered to remove the interference from the excitation signal. For example, let P ₁ =P ₁ -P ₀ , where P ₀ is the interference caused by the excitation signal. Power, interference power P ₀ can be obtained by referring to step (11);

Method 2:

Assuming that the received power corresponding to the measured signal quality of the first backscattered signal is P ₁ and the average received power of the BSC equipment obtained from the relay history is P _avg , it can be determined: N _ref =P ₁ /P _avg ;

The relay feeds back N _ref to the base station;

In particular, if f ₁ has the same frequency as the excitation signal, the interference from the excitation signal can be considered to remove the interference from the excitation signal. For example, let P ₁ =P ₁ -P ₀ , where P ₀ is the interference caused by the excitation signal. power;

In particular, if the relay does not have the auxiliary information required for determining the reference value N _ref , such as P _avg , P ₀ , the base station can indicate the auxiliary information to the relay.

(6) The base station determines the configuration of the BSC device to send the second backscattered signal according to the reference value N _ref ;

(6a) This configuration is the same as the configuration in step (5a) of Embodiment 1, and will not be described again here;

(6b) An example method of obtaining the configuration of the second backscattered signal is as follows:

For frequency f ₂ , frequency f ₂ can adopt the frequency of the excitation signal; or it can be the same as f ₁ ; or it can adopt other frequencies that are different from the frequencies of f ₂ and the excitation signal;

For the dynamic mode of the second backscattered signal, one design goal is to make the probability of busy and idle channels basically the same, that is make Among them, p _a represents the probability that each BSC device sends a backscattered signal in each time slot or transmission opportunity;

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; it can also be a transmission opportunity, such as a BSC device sending a temporary identifier (such as RN16), PC /XPC/EPC and other data packages;

The total number of time slots for sending the second backscattered signal 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;

(7) The base station sends a command to instruct the BSC equipment to send the second backscatter signal;

Wherein, the command indicates part or all of the configuration described in (6a);

(8) The UE listens to the command described in step (7) to send an excitation signal to the BSC device, such as CW, or the base station instructs the UE to send an excitation signal to the BSC device;

(9) After sending the command in step (7), the BSC device uses the excitation signal in step (8) to send the second backscattering signal according to the configuration in (6a);

Among them, the BSC device can independently determine the start of each time slot, or the UE sends a command to the BSC device to indicate the start of the time slot before the start of each time slot. The BSC device waits for T ₅ after receiving the command. Send backscattered signals;

(10) Optionally, the UE indicates part or all of the configuration described in step (6a) to the relay; or, the relay listens to the command described in step (7) to obtain the relevant configuration; or, the relay adopts the agreed configuration;

(11) The relay receives and measures the second backscattered signal, and the base station and the relay cooperate to determine the estimated number of BSC equipment N _est ;

the first method:

The relay records the power average of the received signal on each time slot;

The relay feeds back the power average to the base station;

The base station compares the power average of each time slot with the preset threshold. If it is greater than the preset threshold, the time slot is recorded as busy, otherwise it is idle; the number of busy and idle time slots on the channel is recorded as K ₁ and K respectively. ₂ ;

If the frequency f ₂ is different from the frequency of the excitation signal, the preset threshold can be selected as the channel noise power N ₀ ; if the frequency f ₂ is the same as the frequency of the excitation signal, the preset threshold can be selected as the channel noise power N ₀ and The sum of the excitation signal interference power P ₀ ;

The method of obtaining channel noise power N ₀ and self-interference power P ₀ is as follows:

Method 1: The base station does not send an excitation signal, and the relay measures the received signal power to obtain the channel noise power N ₀ ; then the base station sends an excitation signal and instructs the BSC device not to transmit a signal, and the relay measures the received signal power to obtain the channel noise power N ₀ and The sum of the excitation signal interference powers N ₀ +P ₀ ; the excitation signal interference power P ₀ can be obtained by subtracting the two values;

Method 2: The base station sends an excitation signal and instructs the BSC equipment not to send signals. The relay measures the received signal power and obtains the sum of channel noise power and excitation signal interference power N ₀ +P ₀ ;

The base station calculates N _est :

The second method:

The relay records the power average of the received signal on each time slot;

The relay compares the power average of each time slot with the preset threshold. If it is greater than the preset threshold, the time slot is recorded as busy, otherwise it is idle; the number of busy and idle time slots on the channel is recorded as K ₁ and K respectively. ₂ ;

If the frequency f ₂ is different from the frequency of the excitation signal, the preset threshold can be selected as the channel noise power; if the frequency f ₂ is the same as the frequency of the excitation signal, the preset threshold can be selected as the channel noise power and the excitation signal interference power. Sum;

The method of obtaining channel noise power N ₀ and self-interference power P ₀ can refer to the first method; or, the base station indicates to the relay;

Relay calculation BSC equipment number estimate N _est :

The relay feeds back the estimated number of BSC devices N _est to the base station.

(12) 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.

(13) 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 3:

Embodiment 1 and 2 illustrate the process of designing the second backscatter signal based on the method of counting the number of idle/busy time slots. Differently, this embodiment considers designing the second backscattered signal based on the method of analyzing the baseband IQ signal. 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 description takes the three nodes as readers and writers as an example. The specific process of this embodiment is as follows:

(1) to (4): In this embodiment, steps (1) to (4) are the same as steps (1) to (4) in Embodiment 1, and will not be described again.

(5) The reader/writer determines the configuration of the BSC device to send the second backscattered signal according to the number reference value N _ref of the BSC device;

(5a) The configuration of the second backscattered signal includes at least one of the following:

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

The time interval T ₅ during which the BSC device waits to send the second backscattered signal after the end of the seventh message;

The data type of the second 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 second backscattered signal.

For the power p ₂ of the second backscattered signal, p ₂ 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 ₂ =N ₀ +3dB;

For the dynamic mode of the second backscattered signal, define T ₄ or all time slots as one step, the probability that the BSC device sends the backscattered signal within one step is _pa , _{and pa} ＜＜N _max /N _ref can be selected. 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;

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;

Regarding the data type for sending the second backscatter signal, 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;

Optionally, the command instructs the BSC device to send part or all of the configuration of the second backscatter signal, that is, the configuration in step (5a);

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

(8) The BSC device uses the excitation signal in step (7) to send the second backscattered signal according to the configuration in step (5a);

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 and sends a command to the BSC device to indicate the start of the time slot. The BSC device sends the signal at an interval of T ₅ Backscattered signal.

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

The process of the reader/writer receiving and measuring the second backscattered signal includes:

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;

In particular, if the frequency f ₂ is the same as the frequency of the excitation signal, it is necessary to conduct 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. Interference cancellation eliminates interference caused by excitation signals.

(10) The reader/writer estimates the number of BSC devices based on the configuration described in step (5a) and the measurement information obtained in step (9):

The process for estimating the number of BSC equipment includes:

(10a) 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;

(10b) Optionally, remove outliers, such as removing data that is too far from the mean;

(10c) Optionally, smooth the data, such as taking the average of data sample points at adjacent moments and merging them into one sample point;

(10d) Obtain the number of categories of all data sample points through density-based clustering method;

(10e) Determine whether the clustering result is legal. If the clustering result is illegal, the BSC device quantity estimation process will fail this time. Otherwise, continue to step (10f). Among them, the conditions for determining that the clustering result is illegal include at least one of the following:

The number of categories obtained through step (10d) is not the result of the positive integer power of the modulation order K used to send the second backscatter signal. For example, when the BSC device adopts 2-order modulation, the number of categories after clustering needs to satisfy 2 ⁿ , where n is any positive integer;

The clustered category center points show morbid 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 measurement information obtained through step (9) only contains noise. For example, the average power of the baseband IQ signal measured through step (9) is close to the noise power, and the variance of all data samples is close to the noise power.

(10f) According to the number of categories K' obtained by clustering obtained in step (10d) and the modulation order K of sending the second backscatter signal, the number of BSC devices N _{est is} obtained:
N _est =log _K (K').

(11) Optionally, repeat iterative steps (5)-(10) 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 times the measurement information obtained in step (9) only contains noise 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 number of BSC devices obtained in each iteration;

Optionally, after each round of iteration, the reader/writer re-determines and indicates the configuration described in step (5a);

For example, reselect _pa so that _pa <<N _max /N' _ref , where N' _ref =N _ref -N _est . Among them, "<<" indicates that it is much smaller than.

(12) 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 4:

This embodiment is similar to Embodiment 3. The method for determining the number of devices applied to the single-base system architecture in Embodiment 3 is extended to the cellular system architecture. In this embodiment, the first node, the second node and the third node For different devices, the first node is the base station, the second node is the UE, and the third node is the relay. The specific process of this embodiment is as follows:

(1) to (5): In this embodiment, steps (1) to (5) are the same as steps (1) to (5) in Embodiment 2, and will not be described again.

(6a) This configuration is the same as the configuration in step (5a) of Embodiment 3, and will not be described again here;

For the dynamic mode of the second backscattered signal, define T ₄ or all time slots as one step, the probability that the BSC device sends the backscattered signal within one step is _pa , _{and pa} ＜＜N _max /N _ref can be selected. 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;

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

Optionally, this command instructs the BSC device to send part or all of the configuration of the second backscatter signal, that is, the configuration described in step (6a);

Optionally, the command implicitly or explicitly indicates the interval T ₅ for the UE to send the excitation signal. The interval T ₅ refers to the time interval between sending the excitation signal and sending the command in step (1).

(8) The UE listens to the command in step (7) to send an excitation signal, such as CW, to the BSC device, or the base station instructs the UE to send an excitation signal to the BSC device.

(9) The BSC device uses the excitation signal in step (8) to send the second backscattered signal according to the configuration in step (6a);

Among them, the BSC equipment can independently determine the start of each time slot; or the UE stops sending the excitation signal before the start of each time slot, and the base station or UE sends a command to the BSC equipment to indicate the start of the time slot. The BSC equipment interval is T ₅ Send backscattered signals.

(10) Optionally, the UE indicates part or all of the configuration in (6a) to the relay; or the relay listens to the command in step (7) to obtain the relevant configuration; or the relay adopts the agreed configuration.

(11) The relay receives and measures the second backscattered signal, including:

(12) The base station and relay cooperate 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 (11) to the base station;

The base station estimates the number of BSC devices based on the configuration described in step (6a) and the baseband IQ signal fed back by the relay. The specific method is the same as steps (10a)-(10f) of Embodiment 3, which will not be described again here.

The second method:

The relay estimates the number of BSC devices based on the configuration described in step (6a) and the baseband IQ signal described in step (11). The specific method is the same as steps (10a)-(10f) of Embodiment 3, which will not be described again here.

The relay feeds back an estimate of the number of BSC devices to the base station; wherein, the configuration described in step (6a) can be obtained by the relay listening to the command described in step (7); or, the base station sends a command to instruct the relay; or, uses an agreed command. ; Or, obtained through a combination of more than one of the above three methods.

(13) Optionally, repeat iterative steps (6)-(12) until the conditions are met to stop iteration;

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;

The condition for stopping iteration is the same as the condition for stopping iteration in Embodiment 3, which may be that the number of times the measurement information obtained through step (9) in Embodiment 3 only contains noise reaches an agreed threshold; or the number of iterations reaches an agreed threshold; or , the total iteration time reaches the agreed threshold, etc.;

Optionally, after each round of iteration, the base station re-determines and indicates the configuration described in step (6a);

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

(14) 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 Waveform (such as PIE encoded ASK modulated signal), PDSCH, PDCCH, PSCCH, PSSCH, physical frame is carried in at least one way

(15) 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.

Please refer to Figure 12. Figure 12 is a structural diagram of a device quantity determination device provided by an embodiment of the present application. The device quantity determination device is applied to the first node. As shown in Figure 12, the device quantity determination device 400 includes:

Obtaining module 401 is used to obtain the first quantitative value of the backscattering communication BSC device, the first quantitative value is determined based on the first backscattering signal sent by the BSC device;

Determining module 402, configured to determine a second quantitative value of the BSC device, wherein the second quantitative value is determined based on a second backscattered signal sent by the BSC device, and the configuration of the second backscattered signal Information is determined based on said first quantity value.

Optionally, the device also includes:

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

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Send duration;

Signal power information;

first signal frequency;

Optionally, the device also includes:

The second sending module is configured to send second information to the second node, where the second information is used to instruct the second node to send the first excitation signal to the BSC device.

Optionally, the acquisition module is specifically used to:

Receive the first backscattered signal sent by the BSC device, and measure the signal quality of the first backscattered signal;

A first quantity value of the BSC device is determined based on the signal quality of the first backscattered signal.

Optionally, the acquisition module is specifically used to:

Receive third information sent by a third node, and obtain a first quantitative value of the BSC device based on the third information, where the third information is used to indicate the signal quality of the first backscattered signal; or

Receive fourth information sent by the third node, where the fourth information is used to indicate the first quantitative value of the BSC device.

Optionally, the device also includes:

A third sending module is configured to send fifth information to the BSC device, where the fifth information is used to instruct the BSC device to send the second backscatter signal.

Synchronization information;

Configuration information of the second backscattered signal.

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

Time appointment information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

Instantaneous value of signal quality;

Statistical value of signal quality;

There is temporal information of the backscattered signal;

There is no time information for the backscattered signal;

Baseband IQ signal.

Optionally, the determining module is specifically used to:

Receive the second backscattered signal sent by the BSC device, measure the second backscattered signal, and obtain a measurement result;

A second quantity value of the BSC device is determined based on the measurement of the second backscattered signal.

Optionally, the determining module is specifically used to:

Receive sixth information sent by a third node, and determine a second quantitative value of the BSC device based on the sixth information, the sixth information being used to indicate the measurement result of the second backscatter signal; or

Receive seventh information sent by the third node, where the seventh information is used to indicate a second quantitative value of the BSC device, and the second quantitative value of the BSC device is determined based on the measurement result of the second backscatter signal.

and / or

Explicit instructions, or implicit instructions.

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 acquisition module obtains the first quantity value of the backscatter communication BSC device, and the first quantity value is determined based on the first backscatter signal sent by the BSC device; the determination module determines The second quantity value of the BSC device, wherein the second quantity value is determined based on the second backscatter signal sent by the BSC device, and the configuration information of the second backscatter signal is based on the first quantity The value is determined. In this way, the first quantity value of the BSC device is determined by the first backscattered signal, and the second quantity value of the BSC device is determined by the second backscattered signal determined by the first quantity value, so that the BSC device can be passed twice. The sent backscattered signal determines the number of BSC devices, which 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 13. Figure 13 is a structural diagram of a device quantity determination device provided by an embodiment of the present application. The device quantity determination device is applied to BSC equipment. As shown in Figure 13, the device quantity determination device 500 includes:

The first sending module 501 is used to send a first backscattered signal, the first backscattered signal is used to determine the first quantitative value of the BSC device;

The second sending module 502 is used to send a second backscattered signal, the second backscattered signal is used to determine the second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal Determined based on the first quantity value.

Optionally, the device also includes:

A first receiving module, configured to receive the first information sent by the first node, where the first information is used to indicate that the BSC The device transmits the first backscattered signal.

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Send duration;

Signal power information;

first signal frequency;

Optionally, the device also includes:

The second receiving module is configured to receive fifth information sent by the first node, where the fifth information is used to instruct the BSC device to send the second backscatter signal.

Synchronization information;

Configuration information of the second backscattered signal.

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

The eighth message sent by the first node;

The ninth message sent by the second node.

In the device quantity determination device in the embodiment of the present application, the first sending module sends a first backscattered signal, and the first backscattered signal is used to determine the first quantity value of the BSC device; the second sending module sends the first Two backscattered signals, the second backscattered signal is used to determine a second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is determined based on the first quantitative value. In this way, the first quantity value of the BSC device is determined by the first backscattered signal, and the second quantity value of the BSC device is determined by the second backscattered signal determined by the first quantity value, so that the BSC device can be passed twice. The sent backscattered signal determines the number of BSC devices, which 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 14. Figure 14 is a structural diagram of a device quantity determination device provided by an embodiment of the present application. The device quantity determination device is applied to the third node. As shown in Figure 14, the device quantity determination device 600 includes:

The first determination module 601 is configured to determine the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, the configuration information of the second backscattered signal is determined based on the first quantitative value, the first The quantity value is determined based on the first backscattered signal sent by the BSC device;

The first sending module 602 is used to send the sixth information or seventh information to the first node;

Optionally, the device also includes:

a second determination module, configured to determine third information or fourth information based on the first backscattered signal sent by the BSC device;

a second sending module, configured to send the third information or the fourth information to the first node;

Optionally, the first determination module is specifically used to:

Receive the second backscattered signal sent by the BSC device, and measure the measurement result of the second backscattered signal;

The sixth information or the seventh information is determined based on the measurement result of the second backscattered signal.

Optionally, the second determination module is specifically used to:

The third information or the fourth information is determined based on the signal quality of the first backscattered signal.

Instruction information sent by the first node;

The first information monitored;

The fifth information monitored;

Default configuration.

The device quantity determination device and the first determination module in the embodiment of the present application are configured to determine the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, and the configuration information of the second backscattered signal is based on The first quantitative value is determined based on the first backscattered signal sent by the BSC device; the first sending module is used to send the sixth information or seventh information to the first node; wherein , the sixth information is used to indicate the measurement result of the second backscatter signal, and the seventh information is used to indicate the second quantitative value of the BSC device. In this way, the first quantity value of the BSC device is determined by the first backscattered signal, and the second quantity value of the BSC device is determined by the second backscattered signal determined by the first quantity value, so that the BSC device can be passed twice. The sent backscattered signal determines the number of BSC devices, which 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 15, 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 processor is used to Obtain the first quantity value of the backscatter communication BSC device, the first quantity value is determined based on the first backscatter signal sent by the BSC device; the processor is also used to determine the second quantity of the BSC device value, wherein the second quantitative value is determined based on the second backscattered signal sent by the BSC device, and the configuration information of the second backscattered signal is determined based on the first quantitative value. Alternatively, the communication interface is used to: send a first backscattered signal, the first backscattered signal is used to determine the first quantitative value of the BSC device; the communication interface is also used to: send a second backscattered signal. The second backscattered signal is used to determine a second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is determined based on the first quantitative value. Alternatively, the communication interface is configured to determine the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, the configuration information of the second backscattered signal is determined based on the first quantitative value, and the third A quantitative value is determined based on the first backscattered signal sent by the BSC device; the communication interface is also used to: send the sixth information or seventh information to the first node; wherein the sixth information is used to Indicates the measurement result of the second backscatter signal, and the seventh information is used to indicate the second quantitative value of the BSC device. 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.

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

Specifically, FIG. 16 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. 16 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 (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 processor 810 is configured to: obtain a first quantitative value of the backscatter communication BSC device, where the first quantitative value is determined based on the first backscatter signal sent by the BSC device;

The processor 810 is further configured to: determine a second quantity value of the BSC device, wherein the second quantity value is determined based on a second backscattered signal sent by the BSC device, and the second backscattered signal is Configuration information is determined based on the first quantity value.

Optionally, the radio frequency unit 801 is configured to send first information to the BSC device, where the first information is used to instruct the BSC device to send the first backscatter signal.

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Send duration;

Signal power information;

first signal frequency;

A first time interval, the first time interval is when the BSC device receives information and sends the first reverse scatter The time interval between transmitted signals.

Optionally, the radio frequency unit 801 is also configured to send second information to the second node, where the second information is used to instruct the second node to send the first excitation signal to the BSC device.

Optionally, the radio frequency unit 801 is also configured to: receive the first backscattered signal sent by the BSC device, and measure the signal quality of the first backscattered signal;

Optionally, the radio frequency unit 801 is also configured to: receive the third information sent by the third node, and the processor 810 is further configured to: obtain the first quantitative value of the BSC device based on the third information, the third information is used to: indicating the signal quality of the first backscattered signal; or

The radio frequency unit 801 is also configured to receive fourth information sent by the third node, where the fourth information is used to indicate the first quantitative value of the BSC device.

Optionally, the radio frequency unit 801 is further configured to send fifth information to the BSC device, where the fifth information is used to instruct the BSC device to send the second backscatter signal.

Synchronization information;

Configuration information of the second backscattered signal.

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

Time appointment information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

Instantaneous value of signal quality;

Statistical value of signal quality;

There is temporal information of the backscattered signal;

There is no time information for the backscattered signal;

Baseband IQ signal.

Optionally, the radio frequency unit 801 is also configured to: receive the second backscattered signal sent by the BSC device, and the processor 810 is further configured to: measure the second backscattered signal to obtain a measurement result;

The processor 810 is further configured to determine a second quantity value of the BSC device based on the measurement result of the second backscatter signal.

Optionally, the radio frequency unit 801 is further configured to: receive sixth information sent by the third node, and the processor 810 is further configured to: determine a second quantitative value of the BSC device based on the sixth information, the sixth information A measurement result indicating the second backscattered signal; or

The radio frequency unit 801 is also configured to receive seventh information sent by the third node, where the seventh information is used to indicate a second quantitative value of the BSC device, and the second quantitative value of the BSC device is based on the second backscatter. The measurement result of the signal is determined.

and / or

Explicit instructions, or implicit instructions.

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 equipment is a BSC equipment:

The radio frequency unit 801 is configured to: send a first backscattered signal, where the first backscattered signal is used to determine a first quantitative value of the BSC device;

The radio frequency unit 801 is also configured to: send a second backscattered signal, the second backscattered signal is used to determine the second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is based on The first quantity value is determined.

Optionally, the radio frequency unit 801 is also configured to: receive first information sent by the first node, where the first information is used to instruct the BSC device to send the first backscatter signal.

Relevant information of the BSC equipment;

Synchronization information;

Configuration information of the first backscattered signal.

Send duration;

Signal power information;

first signal frequency;

Optionally, the radio frequency unit 801 is further configured to: receive fifth information sent by the first node, where the fifth information is used to instruct the BSC device to send the second backscatter signal.

Synchronization information;

Configuration information of the second backscattered signal.

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

pilot signal;

leader sequence information;

System time information;

Delimiter information.

The eighth message sent by the first node;

The ninth message sent by the second node.

Wherein, when the electronic device is the third node:

The radio frequency unit 801 is configured to: determine the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, the configuration information of the second backscattered signal is determined based on a first quantitative value, the first quantitative value Determined based on the first backscattered signal sent by the BSC device;

The radio frequency unit 801 is also used to: send the sixth information or the seventh information to the first node;

Optionally, the processor 810 is configured to: determine the third information or the fourth information based on the first backscattered signal sent by the BSC device;

The radio frequency unit 801 is also used to: send the third information or the fourth information to the first node;

Optionally, the radio frequency unit 801 is also configured to: receive the second backscattered signal sent by the BSC device, and measure the measurement result of the second backscattered signal;

The processor 810 is further configured to determine sixth information or seventh information based on the measurement result of the second backscatter signal.

Optionally, the radio frequency unit 801 is also configured to: receive the first backscattered signal sent by the BSC device, and the processor 810 is further configured to: measure the signal quality of the first backscattered signal;

The processor 810 is further configured to determine third information or fourth information based on the signal quality of the first backscattered signal.

Instruction information sent by the first node;

The first information monitored;

The fifth information monitored;

Default configuration.

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 17, the electronic device 900 includes: an antenna 901, a radio frequency device 902, a baseband device 903, a processor 904 and a 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, such as 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. 12, FIG. 13 or Figure 14 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, and 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 duplication, it will not be described again here.

The embodiment of the present application also provides a device quantity determination system, which includes a BSC device and at least one of a first node and a third node. The first node can be used to perform the above-mentioned method applied to the first node. The steps of the method for determining the number of devices, the BSC device may be used to perform the steps of the method for determining the number of devices applied to the BSC device, and the third node may be used to perform the steps of the method applied to the third node as described above. Steps in the Quantity Determination Method.

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, the technical solution of the present application can be embodied in the form of a computer software product that is essentially or contributes to the existing technology. The computer software product is stored in a storage medium (such as ROM/RAM, disk , CD), including several instructions to cause a terminal (which can be a mobile phone, computer, server, air conditioner, or 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 acquires a first quantity value of the backscatter communication BSC device, where the first quantity value is determined based on the first backscatter signal sent by the BSC device;

The first node determines a second quantitative value of the BSC device, wherein the second quantitative value is determined based on a second backscattered signal sent by the BSC device, and the configuration information of the second backscattered signal Determined based on the first quantity value.
The method according to claim 1, wherein before the first node obtains the first quantitative value of the BSC device, the method further includes:

The first node sends first information to the BSC device, where the first information is used to instruct the BSC device to send the first backscatter signal.
The method according to claim 2, 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 3, wherein the configuration information of the first backscattered signal includes at least one of the following:

Send duration;

Signal power information;

first signal frequency;

The first time interval is the time interval between the BSC device receiving information and sending the first backscattered signal.
The method of claim 1, wherein the first backscattered signal is transmitted based on a first excitation signal transmitted for the first node or the second node; and/or

The second backscattered signal is transmitted based on a second excitation signal transmitted by the first node or the second node.
The method according to claim 5, wherein before the first node obtains the first quantity value of the backscatter communication BSC device, the method further includes:

The first node sends second information to the second node, and the second information is used to instruct the second node to send the first excitation signal to the BSC device.
The method according to claim 5, wherein the first excitation signal is sent by the second node based on the first information monitored, and/or the second excitation signal is transmitted by the second node based on the fifth information monitored. Message sent.
The method according to claim 1, wherein the first node obtains the first quantitative value of the BSC device, including:

The first node receives the first backscattered signal sent by the BSC device and measures the signal quality of the first backscattered signal;

The first node determines a first quantity value of the BSC device based on the signal quality of the first backscattered signal.
The method according to claim 1, wherein the first node obtains the first quantitative value of the backscatter communication BSC device, including:

The first node receives the third information sent by the third node, and obtains the first quantitative value of the BSC device based on the third information, where the third information is used to indicate the signal quality of the first backscattered signal. ;or

The first node receives fourth information sent by the third node, where the fourth information is used to indicate the first quantitative value of the BSC device.
The method according to claim 1, wherein after the first node obtains the first quantitative value of the BSC device, the method further includes:

The first node sends fifth information to the BSC device, where the fifth information is used to instruct the BSC device to send the second backscatter signal.
The method according to claim 10, wherein the fifth information is also used to indicate at least one of the following:

Synchronization information;

Configuration information of the second backscattered signal.
The method according to claim 11, wherein the configuration information of the second backscattered signal includes at least one of the following:

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

Time appointment information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

The second time interval is the time interval between the BSC device receiving information and sending the second backscattered signal.
The method according to claim 3 or 11, wherein the synchronization information includes at least one of the following:

pilot signal;

leader sequence information;

System time information;

Delimiter information.
The method of claim 1, wherein the second quantity value is obtained based on a measurement result of the second backscattered signal, the measurement result comprising at least one of the following:

Instantaneous value of signal quality;

Statistical value of signal quality;

There is temporal information of the backscattered signal;

There is no time information for the backscattered signal;

Baseband IQ signal.
The method of claim 14, wherein whether the backscatter signal exists is determined based on a comparison of an instantaneous value or a statistical value of the signal quality with a preset threshold.
The method according to claim 1, wherein the first node determines the second quantitative value of the BSC device, including:

The first node receives the second backscattered signal sent by the BSC device, and measures the second backscattered signal to obtain a measurement result;

The first node determines a second quantity of the BSC device based on the measurement of the second backscattered signal.
The method according to claim 1, wherein the first node determines the second quantitative value of the BSC device, including:

The first node receives sixth information sent by the third node, and determines a second quantitative value of the BSC device based on the sixth information, where the sixth information is used to indicate the second backscattered signal. measurement results; or

The first node receives seventh information sent by the third node, the seventh information is used to indicate a second quantitative value of the BSC device, and the second quantitative value of the BSC device is based on the second backscattered signal. The measurement results are confirmed.
The method according to claim 3 or 11, wherein the configuration information of the first backscattered signal is indicated by first information, and/or the configuration information of the second backscattered signal is indicated by fifth information. Methods of configuring information include:

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

and / or

Explicit instructions, or implicit instructions.
The method according to any one of claims 1 to 12 and 14 to 17, 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 to 12, 14 to 17, 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 BSC device sends a first backscattered signal, the first backscattered signal being used to determine a first quantity value of the BSC device;

The BSC device sends a second backscattered signal, the second backscattered signal is used to determine a second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is based on the first A quantity value is determined.
The method according to claim 21, wherein before the BSC device sends the first backscatter signal, the method further includes:

The BSC device receives the first information sent by the first node, and the first information is used to instruct the BSC device to send the first backscatter signal.
The method according to claim 22, 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 of claim 23, wherein the configuration information of the first backscattered signal includes at least one of the following:

Send duration;

Signal power information;

first signal frequency;

The first time interval is the time interval between the BSC device receiving information and sending the first backscattered signal.
The method of claim 21, wherein the first backscattered signal is transmitted based on a first excitation signal, the first excitation signal being transmitted by the first node or the second node; and/or

The second backscattered signal is transmitted based on a second excitation signal, which is transmitted by the first node or the second node.
The method according to claim 21, wherein before the BSC device sends the second backscatter signal, the method further includes:

The BSC device receives fifth information sent by the first node, and the fifth information is used to instruct the BSC device to send the second backscatter signal.
The method according to claim 26, wherein the fifth information is also used to indicate at least one of the following:

Synchronization information;

Configuration information of the second backscattered signal.
The method of claim 27, wherein the configuration information of the second backscattered signal includes as At least one of the following:

Signal power information;

transmitting a dynamic pattern of a second backscattered signal;

Send total time information;

second signal frequency;

The data type for sending the second backscattered signal;

The modulation order for transmitting the second backscattered signal;

The second time interval is the time interval between the BSC device receiving information and sending the second backscattered signal.
The method according to claim 23 or 27, wherein the synchronization information includes at least one of the following:

pilot signal;

leader sequence information;

System time information;

Delimiter information.
The method of claim 21, wherein the transmission time of the second backscattered signal is determined by the BSC device;

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

The eighth message sent by the first node;

The ninth message sent by the second node.
A method for determining the quantity of equipment, including:

The third node determines the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, the configuration information of the second backscattered signal is determined based on the first quantitative value, the first quantitative value is based on the The first backscattered signal sent by the BSC device is determined;

The third node sends the sixth information or seventh information to the first node;

Wherein, the sixth information is used to indicate the measurement result of the second backscatter signal, and the seventh information is used to indicate the second quantitative value of the BSC device.
The method according to claim 31, wherein before the third node determines the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, the method further includes:

The third node determines third information or fourth information based on the first backscattered signal sent by the BSC device;

The third node sends the third information or fourth information to the first node;

Wherein, the third information is used to indicate the signal quality of the first backscattered signal, and the fourth information is used to indicate the first quantitative value of the BSC device.
The method according to claim 31, wherein the third node determines the sixth information or the seventh information based on the second backscattered signal sent by the BSC device, including:

The third node receives the second backscatter signal sent by the BSC device, and measures the second backscatter signal. Measurement results of radio signals;

The third node determines sixth information or seventh information based on the measurement result of the second backscatter signal.
The method of claim 31, wherein the third node determines third information or fourth information 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 and measures the signal quality of the first backscattered signal;

The third node determines third information or fourth information based on the signal quality of the first backscattered signal.
The method according to claim 31, wherein the third node obtains the configuration information of the second backscattered signal and/or 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 fifth information monitored;

Default configuration.
A device for determining the number of devices, the device for determining the number of devices is applied to a first node, and the device includes:

An acquisition module, configured to acquire a first quantitative value of a backscatter communication BSC device, where the first quantitative value is determined based on the first backscatter signal sent by the BSC device;

Determining module, configured to determine a second quantitative value of the BSC device, wherein the second quantitative value is determined based on a second backscattered signal sent by the BSC device, and the configuration information of the second backscattered signal Determined based on the first quantity value.
A device for determining the quantity of equipment, the device for determining the quantity of equipment is applied to BSC equipment, and the device includes:

A first sending module, configured to send a first backscattered signal, where the first backscattered signal is used to determine the first quantitative value of the BSC device;

The second sending module is configured to send a second backscattered signal, the second backscattered signal is used to determine the second quantitative value of the BSC device, wherein the configuration information of the second backscattered signal is based on The first quantity value is determined.
A device for determining the number of devices, the device for determining the number of devices is applied to a third node, and the device includes:

The first determination module is configured to determine the sixth information or the seventh information based on the second backscattered signal sent by the BSC device. The configuration information of the second backscattered signal is determined based on the first quantitative value. The value is determined based on the first backscattered signal sent by the BSC device;

A first sending module, configured to send the sixth information or seventh information to the first node;

Wherein, the sixth information is used to indicate the measurement result of the second backscatter signal, and the seventh information is used to indicate the second quantitative value of the BSC device.
An electronic device, including a processor and a memory, the memory stores programs or instructions that can be run on the processor, and when the programs or instructions are executed by the processor, any one of claims 1 to 20 is implemented. The steps of the method for determining the number of devices; or, when the program or instructions are executed by the processor, the steps of the method are implemented as claimed in the claims. The steps of the method for determining the number of equipment according to any one of claims 21 to 30; 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 31 to 35 are implemented.
A readable storage medium that stores programs or instructions that, when executed by a processor, implement the steps of the device quantity determination method according to any one of claims 1 to 20, or The steps of implementing the method for determining the number of devices according to any one of claims 21 to 30, or the steps of implementing the method for determining the number of devices according to any one of claims 31 to 35.