CN117241343A

CN117241343A - Access method, device, terminal and network side equipment for backscatter communication

Info

Publication number: CN117241343A
Application number: CN202210631119.3A
Authority: CN
Inventors: 李东儒; 吴凯
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2023-12-15
Also published as: WO2023236826A1

Abstract

The application discloses an access method, a device, a terminal and network side equipment of back scattering communication, belonging to the field of mobile communication. The method comprises the steps that a first device monitors first back scattering information sent by a second device, wherein the first back scattering information is sent by the second device based on a first command, and the first command is sent by a third device; the first device sends a second command to the second device according to the monitoring condition; wherein the first command is different from the second command.

Description

Access method, device, terminal and network side equipment for backscatter communication

Technical Field

The application belongs to the technical field of wireless communication, and particularly relates to an access method, an access device, a terminal and network side equipment for backscatter communication.

Background

In a backscatter (BackScatter Communication, BSC) communication system, a backscatter communication device may transmit information using signal modulation from radio frequency signals in other devices or environments. The backscatter communication device may be an internet of things (Internet of Things, ioT) device such as a Tag device (Tag), and a Reader in the system may trigger backscatter of the Tag device by interacting directly with the Tag device and by activating a carrier wave.

In the backscatter communication system, a communication scenario involving a third party device may also be included, where the third party device may act as a relay device between the reader and the tag device, and although the third party device may in some scenarios assist in the transmission between the reader and the tag device, it also increases the complexity of the communication process.

Disclosure of Invention

The embodiment of the application provides a method, a device, a terminal and network side equipment for accessing back scattering communication, which can solve the problems of increased complexity and communication delay of a communication flow and reduced communication efficiency in a back scattering communication scene participated by third party equipment.

In a first aspect, an access method for backscatter communications is provided, applied to a first device, the method comprising:

the method comprises the steps that a first device monitors first back scattering information sent by a second device, wherein the first back scattering information is sent by the second device based on a first command, and the first command is sent by a third device;

the first device sends a second command to the second device according to the monitoring condition;

wherein the first command is different from the second command.

In a second aspect, there is provided an access device for backscatter communications, comprising:

a first execution module for listening to first backscatter information sent by a second device, the first backscatter information being sent by the second device based on a first command, the first command being sent by a third device;

the first transmission module is used for sending a second command to the second equipment according to the monitoring condition;

wherein the first command is different from the second command.

In a third aspect, an access method for backscatter communications is provided, applied to a third device, the method comprising:

the third device receives the first feedback information and/or the second feedback information from the first device;

wherein the first feedback information is related to first back-scattered information of the second device, the second feedback information is related to first back-scattered information and/or second back-scattered information of the second device, the first back-scattered information is triggered by a first command, the first command is sent by the third device, the second back-scattered information is triggered by a second command, the second command is sent by the second device, the first command is different from the second command, and the first back-scattered information is different from the second back-scattered information.

In a fourth aspect, there is provided an access device for backscatter communications, comprising:

the second transmission module receives the first feedback information and/or the second feedback information from the first equipment;

the second execution module acquires a query result of the second device according to the first feedback information and/or the second feedback information;

In a fifth aspect, there is provided a terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method as described in the first aspect.

In a sixth aspect, a terminal is provided, including a processor and a communication interface, where the processor is configured to monitor, by a first device, first backscatter information sent by a second device, where the first backscatter information is sent by the second device based on a first command, and the communication interface is configured to send, according to a monitoring situation, a second command to the second device.

In a seventh aspect, a network side device is provided, comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the method according to the third aspect.

In an eighth aspect, a network side device is provided, which includes a processor and a communication interface, where the processor is configured to obtain a challenge result of the second device according to the first feedback information and/or the second feedback information, and the communication interface is configured to receive the first feedback information and/or the second feedback information from the first device.

In a ninth aspect, there is provided an access system for backscatter communications, comprising: a first device operable to perform the steps of the access method of backscatter communications as described in the first aspect, a second device operable to perform the steps of the access method of backscatter communications as described in the third aspect, and a third device.

In a tenth aspect, there is provided a readable storage medium having stored thereon a program or instructions which when executed by a processor, performs the steps of the method according to the first aspect, or performs the steps of the method according to the third aspect.

In an eleventh aspect, there is provided a chip comprising a processor and a communication interface coupled to the processor, the processor being for running a program or instructions to implement the method according to the first aspect or to implement the method according to the third aspect.

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

In the embodiment of the application, the first device sends the second command to the second device according to the monitoring condition of the first back scattering information, wherein the first back scattering information is triggered by the first command and the first command is sent by the third device, so that the first device assists the third device in sending part of the command, thereby reducing the feedback process to the third device, reducing the time delay and the complexity of the flow of the three-party back scattering communication, and being beneficial to improving the communication efficiency.

Drawings

Fig. 1 is a schematic diagram of a wireless communication system to which embodiments of the present application are applicable;

fig. 2 is a flow chart of an access method of backscatter communication according to an embodiment of the present application;

fig. 3 is a flow chart of another access method for backscatter communications according to an embodiment of the present application;

fig. 4 is a flow chart of another access method for backscatter communications according to an embodiment of the present application;

fig. 5 is a flow chart of another access method for backscatter communications according to an embodiment of the present application;

fig. 6 is a flow chart of another access method for backscatter communications according to an embodiment of the present application;

fig. 7 is a signaling flow diagram of an access method for backscatter communication according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of an access device for backscatter communications according to an embodiment of the present application;

fig. 9 is a flow chart of another access method for backscatter communications according to an embodiment of the present application;

fig. 10 is a schematic structural diagram of another access device for backscatter communications according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of a communication device according to an embodiment of the present application;

Fig. 12 is a schematic structural diagram of a terminal implementing an embodiment of the present application;

fig. 13 is a schematic structural diagram of a network side device for implementing an embodiment of the present application.

Detailed Description

The technical solutions of the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the application, fall within the scope of protection of the application.

The terms first, second and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or otherwise described herein, and that the "first" and "second" distinguishing between objects generally are not limited in number to the extent that the first object may, for example, be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/" generally means a relationship in which the associated object is an "or" before and after.

It should be noted that the techniques described in the embodiments of the present application are not limited to long term evolution (Long Term Evolution, LTE)/LTE evolution (LTE-Advanced, LTE-a) systems, but may also be used in other wireless communication systems, such as code division multiple access (Code Division Multiple Access, CDMA), time division multiple access (Time Division Multiple Access, TDMA), frequency division multiple access (Frequency Division Multiple Access, FDMA), orthogonal frequency division multiple access (Orthogonal Frequency Division Multiple Access, OFDMA), single carrier frequency division multiple access (Single-carrier FrequencyDivision Multiple Access, SC-FDMA), and other systems. The terms "system" and "network" in embodiments of the application are often used interchangeably, and the techniques described may be used for both the above-mentioned systems and radio technologies, as well as other systems and radio technologies. The following description describes a new air interface (NR) system for purposes of illustrationAnd NR terminology is used in much of the description below, these techniques are also applicable to applications other than NR system applications, such as generation 6 (6 ^th Generation, 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which an embodiment of the present application is applicable. The wireless communication system comprises a first device 11, a third device 12 and a second device 13. The first Device may be a terminal 11, and the terminal 11 may be a mobile phone, a tablet (Tablet Personal Computer), a Laptop (Laptop Computer) or a terminal-side Device called a notebook, a personal digital assistant (Personal Digital Assistant, PDA), a palm Computer, a netbook, an ultra-mobile personal Computer (usb-mobile personal Computer, UMPC), a mobile internet Device (Mobile Internet Device, MID), an augmented reality (augmented reality, AR)/Virtual Reality (VR) Device, a robot, a Wearable Device (weather Device), a vehicle-mounted Device (VUE), a pedestrian terminal (PUE), a smart home (home Device with a wireless communication function, such as a refrigerator, a television, a washing machine, or furniture), a game machine, a personal Computer (personal Computer, PC), a teller machine, or a self-service machine, and the Wearable Device includes: intelligent wrist-watch, intelligent bracelet, intelligent earphone, intelligent glasses, intelligent ornament (intelligent bracelet, intelligent ring, intelligent necklace, intelligent anklet, intelligent foot chain etc.), intelligent wrist strap, intelligent clothing etc.. It should be noted that the specific type of the terminal 11 is not limited in the embodiment of the present application. The third device may be a network side device, a reader/writer, etc., and the network side device 12 may include an access network device or a core network device, where the access network device 12 may also be referred to as a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or a radio access network element. Access network device 12 may include a base station, which may be referred to as a node B, an evolved node B (eNB), an access point, a base transceiver station (Base Transceiver Station, BTS), a radio base station, a radio transceiver, a basic service set (Basic Service Set, BSS), an extended service set (Extended Service Set, ESS), a home node B, a home evolved node B, a transmitting/receiving point (TransmittingReceivingPoint, TRP), or some other suitable terminology in the art, a WLAN access point, a WiFi node, etc., and is not limited to a particular technical vocabulary so long as the same technical effect is achieved, and it should be noted that in the embodiment of the present application, only a base station in an NR system is described as an example, and the specific type of the base station is not limited. The core network device may include, but is not limited to, at least one of: a core network node, a core network function, a mobility management entity (Mobility Management Entity, MME), an access mobility management function (Access and Mobility Management Function, AMF), a session management function (Session Management Function, SMF), a user plane function (User Plane Function, UPF), a policy control function (Policy Control Function, PCF), a policy and charging rules function (Policy and Charging Rules Function, PCRF), an edge application service discovery function (EdgeApplicationServerDiscoveryFunction, EASDF), unified data management (Unified Data Management, UDM), unified data repository (Unified Data Repository, UDR), a home subscriber server (Home Subscriber Server, HSS), a centralized network configuration (Centralized network configuration, CNC), a network storage function (Network Repository Function, NRF), a network opening function (NetworkExposureFunction, NEF), a local NEF (LocalNEF, or L-NEF), a binding support function (Binding Support Function, BSF), an application function (Application Function, AF), and the like. It should be noted that, in the embodiment of the present application, only the core network device in the NR system is described as an example, and the specific type of the core network device is not limited. The third device 13 may be a backscatter communication device, such as a passive internet of things device or a tag device.

The method, the device, the terminal and the network side equipment for accessing the backscatter communication provided by the embodiment of the application are described in detail below through some embodiments and application scenes thereof with reference to the accompanying drawings.

As shown in fig. 2, an embodiment of the present application provides an access method of backscatter communication, where the main implementation body of the method is a first device in a backscatter communication system, in other words, the method may be implemented by software or hardware installed in the first device.

Backscattering (backscattering) refers to a back-scattering communication device that transmits information using signal modulation from radio frequency signals in other devices or environments. A backscatter communications device, which may be:

a Passive Tag (Tag) device belonging to a Passive internet of things (Internet of Things, ioT) device (Passive-IoT);

semi-passive (semi-passive) tags, the downstream receiving or upstream reflecting of such tags has a certain amplifying capability;

tag (active Tag) with active transmission capability, such tags can send information to a reader (reader) independent of back-scattering of the incoming signal.

For simplicity, in the following embodiments, the backscatter communication devices are illustrated with tags as examples.

Conventional RFID technology (Radio Frequency Identification, RFID) designs require a reader to send a Query (Query) followed by a Tag response (Reply) in the inventory mode, which generates a 16-bit random sequence (RN 16) to the reader. The reader then sends the sequence to the Tag via an Acknowledgement (ACK) instruction, and the Tag sends the relevant data to the reader.

In at least one alternative embodiment of the present application, backscatter communications may be understood as transmission of a backscatter channel or signal, where the backscatter channel or signal transmission includes: (1) an excitation carrier, (2) a control command, and (3) backscatter information. Specific:

(1) Exciting the carrier wave; in one embodiment, the excitation carrier may be sent to the tag by the network side device or may be sent to the tag by the terminal.

(2) Control commands (command), for example: selecting commands, querying commands, repeating querying commands, replying commands, reading commands, writing commands, random requesting commands, etc.; in one embodiment, the control command may be sent to the tag by the network side device, or may be sent to the tag by the terminal.

Optionally, the control command may include at least one of: selecting a type command, checking the type command and accessing the command; wherein the select type command includes at least one of: select command (a specific select command), inventory command, sort command; the inventory type command includes at least one of: query commands (one specific query command), adjust query commands, repeat query commands; the access command includes at least one of: a random request command, a read command, a write command, a destroy command, a lock command, an access command, a security related access command, a file management related access command.

The selection (Select) type command is necessary, because the tags have various attributes, based on the criteria and strategies set by the user, a specific tag group is manually selected or delineated by changing certain attributes and marks by using the selection type command, and only inventory identification or access operation can be performed on the tag group, so that collision reduction and repeated identification are facilitated, and the identification speed is increased.

The inventory type command is used to start an inventory. For example, the query command is used to initiate a round of inventory and determine which tags are involved in the round of inventory; the adjustment inquiry command is used for adjusting the number of the original receiving moments (Slot) of the tags; the repeat query command is used to reduce the number of tags Slot.

In an Access command, a random request (req_rn) command requires the tag to generate a random number; the read command is used for reading data from a certain position in the storage of the tag; the write command is used for writing data into the storage of the tag; the destroying command can prevent privacy leakage, and the tag can not be used any more; the locking command is used for preventing the label from writing any more, so that the data is prevented from being changed by any strings; the access command is used for enabling the tag to be transferred from an Open (Open) state to a protected (Secure) state when the tag has a password; the security related access command is used for guaranteeing the security of the tag; the file management related access command may be used to manage files within the tag.

(3) Backscatter information, such as: tag identification information (such as a 16-bit random number temporarily representing Tag identity in the query process), electronic product code information, tag status information and the like. In one embodiment, the backscatter channel or signal may be transmitted by the tag to the terminal, or the tag may be transmitted by backscatter to the network side device.

The information transmission between the challenger or reader and the Tag (Tag) in the embodiment of the application comprises:

a. selection (Select) operation: the reader-writer selects the tag group for subsequent counting or cryptographically challenging the tag group for subsequent authentication. The select operation includes a select command (select) and a Challenge command (Challenge).

b. Inventory (Inventory) operation: the reader/writer identifies the tag. The reader/writer starts the inventory by transmitting a query command in one of four sessions. One or more tags may reply. The reader detects a single tag reply and requests a Product Code (PC), an optional XPC word, an electronic Product Code (ElectronicProductCode, EPC), and CRC-16 from the tag. A roulette point is only running in one session at a time. Inventory contains a plurality of commands, of which very important commands are query-related commands, such as query commands, repeat query commands, etc.

c. Access (Access) operation: the reader/writer performs the process of transacting (reading, writing, verifying or otherwise participating) with a single tag. The reader/writer individually recognizes and uniquely identifies the tag prior to access. The access includes a plurality of commands.

Specifically, the first command or the second command mentioned in the embodiment of the present application may specifically include: command (command) between reader and Tag (Tag) is shown in table 1.

TABLE 1

The respective states of the Tag (Tag) are shown in table 2.

TABLE 2

The access method of the backscatter communication of the embodiment of the application comprises the following steps.

S110, the first device listens for first back-scattered information sent by the second device, the first back-scattered information being sent by the second device based on the first command.

It should be understood that the backscatter communication system may include a network side device 12, a terminal 11, and a backscatter communication device 13 as shown in fig. 1, where the network side device 12 may specifically be a base station (gNB) or the like, and the backscatter communication device may be a Tag device (Tag).

The embodiment of the application can send the first Command and the second Command to the back-scattering communication equipment respectively by the network side equipment and the terminal when the back-scattering communication equipment is operated by shunting the Command (Command) sent to the back-scattering communication equipment. The certain operation may be a challenge operation to the backscatter communication device, i.e. the first command and the second command are for instructing the second device to perform a challenge operation, and the first command and the second command are different.

The first device is one of a network side device and a terminal, the third device is the other of the network side device and the terminal, the second device is a back scattering communication device, the third device can send a first command to the second device, and the first device can send a second command to the second device.

In one embodiment, the first device is a terminal, and the third device is a network-side device.

In another embodiment, the first device is a network side device, and the third device is a terminal.

For simplicity, in the following embodiments, the first device is taken as a terminal, and the third device is taken as a network side device for illustration.

In one embodiment, a first command is sent by the third device to the second device to initiate an inventory or challenge procedure for the second device.

In one embodiment, the first command includes at least one of:

selection commands may include, for example, select, challenge, sort (sort);

inventory commands may include, for example, query, queryAdjust, queryRep;

the Access commands may include, for example, req_rn, read, write, lock, kill, access, blockWrite, blockErase, blockPermalock, authentication, readBuffer, secureComm, authComm, keyUpdate, untreacable, fileOpen, fileList, filePrivilege, fileSetup, and tagprivile.

It should be noted that, the specific command of the first command may be shown in the above table 1, which is not described herein.

The second device may send first backscatter information in a backscatter manner according to the first command.

In one embodiment, the first backscatter information includes at least one of:

identification information of the second device, for example a 16-bit random number (RN 16) representing the identity of the tag;

electronic product code information of the second device, such as PC and EPC;

handle information (handle) of the second device.

And the first equipment monitors the first back scattering information sent by the second equipment. The first device's first back-scatter information listening occasion to the second device may be a default state of the first device, or listening may be started when the back-scatter system is determined to be in the inventory phase, or listening may be started when the second device is determined to perform a challenge operation.

S120, the first device sends a second command to the second device according to the monitoring condition. Wherein the first command is different from the second command.

The monitoring condition of the first device to the first backscatter information of the second device may include whether the first backscatter information of the second device is successfully received, whether the content obtained from the first backscatter information is correctly parsed, and also may include a condition that the current reader/writer does not want to reply to the first backscatter information, which is not limited herein.

The first device sends a second command to the second device according to the listening situation, and in one embodiment, the second command may include at least one of the following:

selecting a command;

counting commands;

an access command.

In one embodiment, the second command may also be used to indicate successful or unsuccessful reception of the first backscatter information. In the case that the first device successfully receives the first backscatter information of the second device, the second command transmitted by the first device to the second device may include an acknowledgement message (ACK) indicating successful reception. In the event that the first device does not successfully receive the first backscatter information of the second device or the current reader/writer does not want to reply to the first backscatter information, the second command sent by the first device to the second device may include a non-acknowledgement command (NAK). The use of NAKs is specifically described in Table 1.

It should be understood that, the first device may not successfully receive the first backscatter information of the second device, or may incorrectly receive the first backscatter information, which may be caused by collision of a plurality of second devices, so that a plurality of first backscatter information are simultaneously transmitted, which is not limited herein.

Alternatively, the first device may send the first backscatter information to a third device. And the third device successfully acquires the back scattering information of the second device according to the feedback information, so that the second device is checked or accessed, and further subsequent read-write operation can be performed on the second device.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by monitoring first backscatter information sent by a second device, where the first backscatter information is sent by the second device based on a first command, and then sending a second command to the second device according to a monitoring situation, a third device triggers, through the first command, a challenge operation on the second device, and the second device performs a subsequent challenge operation, and by the first device, the third device is assisted to send a part of the command, so that a feedback process to the third device is reduced, time delay and complexity of a flow of three-way backscatter communication are reduced, and communication efficiency is advantageously improved.

Based on the above embodiment, optionally, as shown in fig. 3, after step S120, the method further includes:

s130, the first device monitors second back scattering information sent by the second device, the second back scattering information is triggered by the second command, and the first back scattering information is different from the second back scattering information.

After the first device sends the second command to the second device, in an embodiment, if the second command indicates that the first backscatter information is not successfully received, the second device reverts to the Arbitrate state, so as to wait for receiving the first command sent by the third device again.

In another embodiment, if the second command indicates that the first backscatter information is successfully received, the second device may send second backscatter information by backscatter according to the received second command, where in one embodiment, the second backscatter information includes at least one of:

identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

Based on the first command and the second command, the content of the first backscatter information and the second backscatter information sent by the second device are different, and in one embodiment, the first backscatter information may include identification information of the second device, and the second backscatter information may include electronic product code information of the second device, where, for simplicity, the first backscatter information includes RN16 corresponding to the second device, and the second backscatter information includes PC or EPC corresponding to the second device is illustrated in the following embodiments.

It will be appreciated that the second device transmits the first and second backscatter information in a backscatter manner, for which purpose it is necessary to transmit to the second device a corresponding stimulus carrier, which may be transmitted by the first device or the third device, depending on the particular setting.

In one embodiment, the first device and the third device may each transmit a corresponding excitation carrier, and at this time, the first device and the third device may transmit the corresponding excitation carrier to the second device after transmitting the corresponding command to the second device.

The third device transmits a third excitation carrier CW3 after transmitting the first command to the second device, the third excitation carrier CW3 being used by the second device to backscatter the first backscatter information. In order to ensure that no collision with the first command occurs, the third device transmits the first command and the third excitation carrier CW3 needs to be such that no overlap occurs.

After step S120, the first device transmits a first excitation carrier CW1 for back-scattering the second back-scattering information, the first excitation carrier CW1 being used for back-scattering the second back-scattering information by the second device. To ensure that no collision with a second command occurs, the second command is not overlapped with the first excitation carrier in time domain.

In another embodiment, the excitation carrier may be transmitted by only one of the first device or the third device, which is exemplified by the fact that the excitation carrier may be transmitted by only the network-side device, i.e., the third device.

The third device transmits a third excitation carrier CW3 after transmitting the first command to the second device, the third excitation carrier CW3 being used by the second device to backscatter the first backscatter information.

The second backscatter information of the second device may be backscattered in accordance with a second excitation carrier CW2, which is emitted by the third device, i.e. the third device transmits the second excitation carrier CW2 after step S120.

The third device transmitting a second excitation carrier to the second device needs to meet at least one of:

in a first time interval T1 from the end time of a time unit where the third device sends the first command, the third device sends a second excitation carrier CW2 to the second device, and the time unit can be millisecond or time slot;

after the third device transmits a second time interval T2 from the end time of the time unit where the first command is located, the third device transmits a second excitation carrier CW2 to the second device;

Wherein the second time interval is less than or equal to the first time interval, i.e. the third device may send the second excitation carrier CW2 after T2 and before T1 from the end time of the time unit in which the first command is located.

It should be appreciated that the second and third excitation carriers CW2 and CW3 transmitted by the third device may be the same excitation carrier, or may be different intensities or time lengths of excitation carriers depending on the requirements of the second device to transmit the first and second backscatter information, and are not specifically limited herein.

Likewise, the second and third excitation carriers CW2, CW3 may be the same or different from the first excitation carrier CW1 transmitted by the first device.

According to the technical scheme of the embodiment, the first command sent by the third device is monitored, then the first back scattering information of the second device is monitored, and the second back scattering information of the second device is monitored after the second command is sent, so that the feedback process to the third device can be reduced, the time delay and the complexity of the flow of three-party back scattering communication are reduced, and the communication efficiency is improved.

Based on the above embodiment, optionally, as shown in fig. 4, before step S110, the method further includes:

s100, the first device monitors the first command sent by the third device.

The first device can monitor the first command sent by the third device, so that the content of the first back scattering information triggered by the first command can be prejudged, and the correctness of the first back scattering information and the like can be conveniently determined.

Based on the above embodiment, optionally, feedback information reported by the first device to the third device may be determined according to first backscatter information and/or second backscatter information of the second device.

In one embodiment, as shown in fig. 5, after step S130, the method further includes:

s140, the first device sends second feedback information to the third device, where the second feedback information is related to the first backscatter information and/or the second backscatter information.

If the first device successfully receives the second backscatter information, the second feedback information may include content in the second backscatter information, such as electronic product code information of the second device;

If the first device does not successfully receive the second backscatter information, the second feedback information may include an indication that the second device did not successfully receive the second backscatter information;

in another embodiment, after step S110, the method further comprises:

the first device sends first feedback information to the third device, the first feedback information being related to the first backscatter information.

The first device may send first feedback information to the third device directly according to the first backscatter information of the second device, and decide whether to execute the subsequent step according to the actual requirement after sending the first feedback information.

According to the technical scheme of the embodiment, after the inquiry operation of the second device is completed, the first feedback information and/or the second feedback information is sent to the third device, so that the feedback process to the third device can be reduced, the time delay and the complexity of the flow of three-party back scattering communication are reduced, and the communication efficiency is improved.

Based on the foregoing embodiment, optionally, as shown in fig. 6, in an implementation manner, the third device may sequentially send a first command to N second devices, where the first command is used to sequentially trigger a challenge operation for the second devices, and the first device performs a subsequent challenge operation for the N second devices, and after obtaining the challenge results of the N second devices, the subsequent challenge operation is uniformly reported to the third device.

If the second command sent by the first device to the second device indicates that the second device successfully receives the first backscatter information of the second device in step S120, after step S120, the first device needs to execute step S130 to monitor the second backscatter information sent by the second device.

If the second command sent by the first device to the second device indicates that the second device does not successfully receive the first backscatter information of the second device in step S120, in one embodiment, as shown in fig. 6, after step S120, the first device may perform step S100 to monitor the first command sent by the third device. In another embodiment, after step S120, the first device may also continue to perform step S130 until the time interval for listening for the second backscatter information passes, and then perform step S100.

The step S140 includes:

s141, under the condition that the first equipment monitors first back scattering information and/or second back scattering information sent by N pieces of second equipment, the first equipment sends second feedback information to third equipment; wherein N is a positive integer, and the second feedback information is related to the first backscatter information and/or the second backscatter information corresponding to the N second devices.

It should be understood that the N second devices may be all or part of the second devices in the backscatter system, or may be all or part of the second devices corresponding to the first device, and for simplicity, the N second devices corresponding to the first device are exemplified in the following embodiments.

It should be appreciated that the time interval at which the third device transmits adjacent first commands to the N second devices is greater than or equal to the third time interval T3.

The first device may send the second feedback information in a fourth time interval T4 from the end time of the time unit where the first command in the N second devices is sent by the third device. Wherein the fourth time interval is related to the third time interval, e.g., the fourth time interval is greater than or equal to N times the third time interval.

Accordingly, the third device may also monitor the second feedback information during the fourth time interval.

The third device can successfully acquire the inquiry results of the N second devices according to the received first feedback information and/or second feedback information, so that the N second devices are accessed, and subsequent read-write operations can be further performed on the N second devices.

As shown in fig. 7, an embodiment of the present application provides a specific implementation of an access method for backscatter communication, where the method is divided into three stages: a selection phase A1, an inventory phase A2 and an access phase A3.

A1. The third device sends a selection command to a device group comprising N second devices, causing the device group to enter the A2 phase.

A2.1. A challenge operation is first initiated by the third device gNB to the second device Tag1, i.e. a first command is sent to Tag1, and after the end of said first command transmission, an excitation carrier CW1 is sent to for Tag1 to feed back the first backscatter information.

A2.2.tag1 feeds back first backscatter information, e.g. RN16, to be received by the first device UE. Note that, the first device may successfully receive RN16 of Tag1, or may not successfully receive RN16 of Tag1.

A2.3. After the first device successfully receives the RN16 of Tag1, the terminal sends an acknowledgement command ACK, i.e. a second command, to Tag1.

A2.4. The third device transmits the second excitation carrier CW2 after T2 and before T1 from the end time of the time unit in which the first command is located.

A2.5.Tag1 feeds back second backscatter information, e.g., tag 1's electronic product code, that is received by the first device. It should be appreciated that the first device may or may not successfully receive the second backscatter information fed back by Tag1.

Repeating a 2.1-2.5 for each Tag in the N second devices, the first device is then able to obtain the challenge result for each Tag in the N network-initiated challenge operations. It should be understood that the challenge result of the Tag collected by the terminal may include 0 or more challenge results of the Tag. Depending on whether the first and/or second backscatter information of the Tag was successfully received.

As shown in fig. 7, the first device does not successfully receive the first backscatter information of Tag2, at this time, the second command sent by the first device to Tag2 may be NAK, and Tag2 will not trigger any feedback after receiving the second command, but returns to the arbit state.

A2.6. After collecting the inquiry results (including successful reception and unsuccessful reception) of the N second devices, the terminal may package the inquiry results through the Uu air interface to send the inquiry results to the third device, that is, send the second feedback information.

In addition, for the challenge result of each second device, all or part of the information of the Tag challenge result may be included. For example, the first device only needs to include the electronic product code of the second device in the second feedback information, so that the information such as RN16 may not be included. In addition, if the first device does not successfully receive the challenge result of the second device, the first device may not include the challenge result of the second device in the second feedback information, or record that the challenge result of the second device is NULL (NULL), so as to inform the third device that the challenge result of the Tag is not successfully received.

A3. The third device can successfully acquire the electronic product code of the second device according to the second feedback information of the second device, so that the second device is further subjected to read-write operation.

In one embodiment, after entering the access phase, the first device does not send the second command to the second device any more, but instead, the third device is given all the relevant commands, e.g. random access commands, etc. Therefore, when the terminal receives the inquiry result of the second device, the terminal needs to send the related inquiry result of the second device to the third device for processing.

According to the technical scheme of the embodiment, after the first back scattering information and/or the second back scattering information of the N second devices are monitored, the query results of the N second devices are unified and summarized, and then the second feedback information is sent to the third device, so that the feedback process to the third device can be reduced, the time delay and the complexity of the flow of three-party back scattering communication are reduced, and the communication efficiency is improved.

According to the access method for the backscatter communication provided by the embodiment of the application, the execution main body can be an access device for the backscatter communication. In the embodiment of the present application, an access method for performing backscatter communication by using an access device for backscatter communication is taken as an example, and the access device for backscatter communication provided by the embodiment of the present application is described.

As shown in fig. 8, the access device for backscatter communication includes a first execution module 701 and a first transmission module 702.

The first execution module 701 is configured to monitor first backscatter information sent by a second device, where the first backscatter information is sent by the second device based on a first command, and the first command is sent by a third device; the first transmission module 702 is configured to send a second command to a second device according to a listening situation; wherein the first command is different from the second command.

Optionally, the first device is one of a network side device and a terminal, the third device is the other of the network side device and the terminal, and the second device is a backscatter communication device.

Optionally, the first command or the second command includes at least one of:

selecting a command;

counting commands;

an access command.

Optionally, the second command is used for responding to the listening situation of the first backscatter information.

Optionally, the first backscatter information includes at least one of:

identification information of the second device;

electronic product code information of the second device;

Handle information of the second device.

Optionally, the second backscatter information includes at least one of:

identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

As can be seen from the technical solutions of the foregoing embodiments, in the embodiments of the present application, by monitoring first backscatter information sent by a second device, where the first backscatter information is sent by the second device based on a first command, and then sending a second command to the second device according to a monitoring situation, a third device triggers, through the first command, a challenge operation on the second device, and the second device performs a subsequent challenge operation, thereby reducing a feedback process to the third device, reducing latency and complexity of a flow of three-way backscatter communication, and being beneficial to improving communication efficiency.

Based on the above embodiment, optionally, the first transmission module 702 is further configured to listen for the first command sent by the third device.

Optionally, the first transmission module 702 is further configured to monitor second backscatter information sent by the second device, where the second backscatter information is triggered by the second command, and the first backscatter information is different from the second backscatter information.

Optionally, the first transmission module 702 is further configured to send a first excitation carrier, where the first excitation carrier is used for the second device to backscatter the second backscatter information.

Optionally, the second command does not overlap with the first excitation carrier in time domain.

Optionally, the second backscatter information is backscattered from the second excited carrier, wherein the second excited carrier is emitted by the third device.

Based on the above embodiment, optionally, the first transmission module 702 is further configured to send first feedback information to the third device, where the first feedback information is related to the first backscatter information.

Optionally, the first transmission module 702 is further configured to send second feedback information to the third device, where the second feedback information is related to the first backscatter information and/or the second backscatter information.

Based on the above embodiment, optionally, the first transmission module 702 is configured to send second feedback information to a third device in a case of listening to the first backscatter information and/or the second backscatter information sent by the N second devices; wherein N is a positive integer, and the second feedback information is related to the first backscatter information and/or the second backscatter information corresponding to the N second devices.

The access device for backscatter communication in the embodiment of the present application may be an electronic device, for example, an electronic device with an operating system, or may be a component in an electronic device, for example, an integrated circuit or a chip. The electronic device may be a terminal, or may be other devices than a terminal. By way of example, terminals may include, but are not limited to, the types of terminals 11 listed above, other devices may be servers, network attached storage (Network Attached Storage, NAS), etc., and embodiments of the application are not specifically limited.

As shown in fig. 9, an embodiment of the present application provides an access method of backscatter communication, where the implementation subject of the method is a third device in a backscatter communication system, in other words, the method may be implemented by software or hardware installed in the third device. The method comprises the following steps:

s810, the third device receives first feedback information and/or second feedback information from the first device;

Optionally, the first command includes at least one of the following commands:

selecting a command;

inquiring a type command;

an access command.

Optionally, before step S810, the method further includes:

the third device sends a first command to a second device, the first command being used to trigger the second device to send the first backscatter information.

Optionally, after sending the first command to the second device, the method further comprises:

the third device transmits a second excitation carrier to the second device, the second excitation carrier being used to cause the second device to transmit second backscatter information.

Optionally, the third device sends a second excitation carrier to the second device that satisfies at least one of:

in a first time interval from the end time of the time unit where the third device sends the first command, the third device sends a second excitation carrier wave to the second device;

after the third device transmits a second time interval from the end time of the time unit where the first command is located, the third device transmits a second excitation carrier to the second device;

wherein the second time interval is less than or equal to the first time interval.

Optionally, the first backscatter information or the second backscatter information comprises at least one of:

identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

Optionally, the third device sends a first command to the second device, including:

the third device sends first commands to N second devices;

the time interval of the adjacent first commands is larger than or equal to the third time interval, and N is a positive integer.

Optionally, the second feedback information is related to the first backscatter information and/or the second backscatter information of the N second devices.

Step S810 may implement the method embodiments shown in fig. 2-5, and obtain the same technical effects, and the repetition of the description is omitted here.

According to the technical scheme of the embodiment, the first command is sent to the second device, the first feedback information and/or the second feedback information are received from the first device, the command in the inquiry operation process of the second device is split and sent by the third device and the second device respectively, the third device triggers the inquiry operation of the second device through the first command, the second device executes subsequent inquiry operation, and the received inquiry results of the N second devices are summarized uniformly and then sent to the third device, so that the feedback process to the third device can be reduced, the time delay and the complexity of the flow of three-way backscatter communication are reduced, and the communication efficiency is improved.

As shown in fig. 10, the access device for backscatter communication includes: a second transmission module 901 and a second execution module 902.

The second transmission module 901 receives first feedback information and/or second feedback information from the first device; the second execution module 902 is configured to obtain a challenge result of the second device according to the first feedback information and/or the second feedback information; wherein the first feedback information is related to first back-scattered information of the second device, the second feedback information is related to first back-scattered information and/or second back-scattered information of the second device, the first back-scattered information is triggered by a first command, the first command is sent by the third device, the second back-scattered information is triggered by a second command, the second command is sent by the second device, the first command is different from the second command, and the first back-scattered information is different from the second back-scattered information.

Optionally, the first command includes at least one of the following commands:

selecting a command;

counting commands;

an access command.

Optionally, the second transmission module 901 is further configured to send a first command to a second device, where the first command is used to trigger the second device to send the first backscatter information.

the third device transmits a second excitation carrier to the second device, the second excitation carrier being used to cause the second device to backscatter the first backscatter information.

Optionally, transmitting a second excitation carrier to the second device satisfies at least one of:

transmitting a second excitation carrier wave to the second equipment in a first time interval from the end time of the time unit where the first command is transmitted;

transmitting a second excitation carrier to the second device after a second time interval from the end time of the time unit in which the first command is transmitted;

Identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

Optionally, the second transmission module 901 is configured to send the first command to N second devices;

According to the technical scheme of the embodiment, the first command is sent to the second device, the first feedback information and/or the second feedback information are received from the first device, the command in the inquiry operation process of the second device is shunted and sent by the access device of the backscatter communication and the second device respectively, the access device of the backscatter communication triggers the inquiry operation of the second device through the first command, the second device executes the subsequent inquiry operation, and the received inquiry results of the N second devices are summarized uniformly and then sent to the access device of the backscatter communication, so that the feedback process to the third device can be reduced, the time delay and the complexity of the three-party backscatter communication are reduced, and the communication efficiency is improved.

The access device for backscatter communication provided by the embodiment of the present application can implement each process implemented by the method embodiment of fig. 9, and achieve the same technical effects, and in order to avoid repetition, the description is omitted here.

Optionally, as shown in fig. 11, the embodiment of the present application further provides a communication device 1000, including a processor 1001 and a memory 1002, where the memory 1002 stores a program or instructions that can be executed on the processor 1001, for example, when the communication device 1000 is a terminal, the program or instructions implement the steps of the foregoing embodiment of the access method of backscatter communication when executed by the processor 1001, and achieve the same technical effects. When the communication device 1000 is a network side device, the program or the instruction implements the steps of the above-mentioned access method embodiment of the backscatter communication when executed by the processor 1001, and the same technical effects can be achieved, so that repetition is avoided, and no further description is given here.

The embodiment of the application also provides a terminal, which comprises a processor and a communication interface, wherein the processor is used for monitoring the first back scattering information sent by the second equipment, and the communication interface is used for sending a second command to the second equipment according to the monitoring condition. The terminal embodiment corresponds to the terminal-side method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the terminal embodiment, and the same technical effects can be achieved. Specifically, fig. 12 is a schematic diagram of a hardware structure of a terminal for implementing an embodiment of the present application.

The terminal 1100 includes, but is not limited to: at least part of the components of the radio frequency unit 1101, the network module 1102, the audio output unit 1103, the input unit 1104, the sensor 1105, the display unit 1106, the user input unit 1107, the interface unit 1108, the memory 1109, and the processor 1110, etc.

Those skilled in the art will appreciate that the terminal 1100 may further include a power source (e.g., a battery) for powering the various components, and that the power source may be logically coupled to the processor 1110 by a power management system so as to perform functions such as managing charging, discharging, and power consumption by the power management system. The terminal structure shown in fig. 12 does not constitute a limitation of the terminal, and the terminal may include more or less components than shown, or may combine certain components, or may be arranged in different components, which will not be described in detail herein.

It should be appreciated that in embodiments of the present application, the input unit 1104 may include a graphics processing unit (Graphics Processing Unit, GPU) 11041 and a microphone 11042, the graphics processor 11041 processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The display unit 1106 may include a display panel 11061, and the display panel 11061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 1107 includes at least one of a touch panel 11071 and other input devices 11072. The touch panel 11071 is also referred to as a touch screen. The touch panel 11071 may include two parts, a touch detection device and a touch controller. Other input devices 11072 may include, but are not limited to, a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and so forth, which are not described in detail herein.

In the embodiment of the present application, after receiving downlink data from the network side device, the radio frequency unit 1101 may transmit the downlink data to the processor 1110 for processing; in addition, the radio frequency unit 1101 may send uplink data to the network side device. Typically, the radio frequency unit 1101 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

Memory 1109 may be used to store software programs or instructions and various data. The memory 1109 may mainly include a first memory area storing programs or instructions and a second memory area storing data, wherein the first memory area may store an operating system, application programs or instructions (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like. Further, the memory 1109 may include volatile memory or nonvolatile memory, or the memory 1109 may include both volatile and nonvolatile memory. The non-volatile memory may be a Read-only memory (ROM), a programmable Read-only memory (ProgrammableROM, PROM), an erasable programmable Read-only memory (ErasablePROM, EPROM), an electrically erasable programmable Read-only memory (ElectricallyEPROM, EEPROM), or a flash memory, among others. The volatile memory may be random access memory (Random Access Memory, RAM), static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (ddr SDRAM), enhanced SDRAM (Enhanced SDRAM), synchronous DRAM (SLDRAM), and Direct RAM (DRRAM). Memory 1109 in embodiments of the present application includes, but is not limited to, these and any other suitable types of memory.

Processor 1110 may include one or more processing units; optionally, the processor 1110 integrates an application processor that primarily processes operations involving an operating system, user interface, application programs, and the like, and a modem processor that primarily processes wireless communication signals, such as a baseband processor. It will be appreciated that the modem processor described above may not be integrated into the processor 1110.

Wherein the processor 1110 is configured to monitor first backscatter information sent by a second device, where the first backscatter information is sent by the second device based on a first command, where the first command is sent by a third device;

a radio frequency unit 1101, configured to send a second command to the second device according to the listening situation; wherein the first command is different from the second command.

Optionally, the first command or the second command includes at least one of:

selecting a command;

inquiring a type command;

An access command.

Optionally, the first backscatter information includes at least one of:

identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

Optionally, the second backscatter information includes at least one of:

identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

The embodiment of the application reduces the feedback process to the third equipment, reduces the time delay and the complexity of the flow of the three-party back scattering communication, and is beneficial to improving the communication efficiency.

Based on the above embodiment, optionally, the radio frequency unit 1101 is further configured to listen for the first command sent by the third device.

Optionally, the radio frequency unit 1101 is further configured to monitor second backscatter information sent by the second device, where the second backscatter information is triggered by the second command, and the first backscatter information is different from the second backscatter information.

Optionally, the radio frequency unit 1101 is further configured to send a first excitation carrier, where the first excitation carrier is used for the second device to backscatter the second backscatter information.

The embodiment of the application can reduce the feedback process to the third equipment, reduce the time delay and the complexity of the flow of the three-party back scattering communication, and is beneficial to improving the communication efficiency.

Based on the above embodiment, optionally, the radio frequency unit 1101 is further configured to send first feedback information to the third device, where the first feedback information is related to the first backscatter information.

Optionally, the radio frequency unit 1101 is further configured to send second feedback information to the third device, where the second feedback information is related to the first backscatter information and/or the second backscatter information.

Based on the above embodiment, optionally, the radio frequency unit 1101 is configured to send second feedback information to a third device in a case of listening to the first backscatter information and/or the second backscatter information sent by the N second devices; wherein N is a positive integer, and the second feedback information is related to the first backscatter information and/or the second backscatter information corresponding to the N second devices.

The embodiment of the application also provides a network side device which comprises a processor and a communication interface, wherein the processor is used for acquiring the inquiry result of the second device according to the first feedback information and/or the second feedback information, and the communication interface is used for receiving the first feedback information and/or the second feedback information from the first device. The network side device embodiment corresponds to the network side device method embodiment, and each implementation process and implementation manner of the method embodiment can be applied to the network side device embodiment, and the same technical effects can be achieved.

Specifically, the embodiment of the application also provides network side equipment. As shown in fig. 13, the network side device 1200 includes: an antenna 121, a radio frequency device 122, a baseband device 123, a processor 124, and a memory 125. The antenna 121 is connected to a radio frequency device 122. In the uplink direction, the radio frequency device 122 receives information via the antenna 121, and transmits the received information to the baseband device 123 for processing. In the downlink direction, the baseband device 123 processes information to be transmitted, and transmits the processed information to the radio frequency device 122, and the radio frequency device 122 processes the received information and transmits the processed information through the antenna 121.

The method performed by the network side device in the above embodiment may be implemented in the baseband apparatus 123, where the baseband apparatus 123 includes a baseband processor.

The baseband apparatus 123 may, for example, include at least one baseband board, where a plurality of chips are disposed, as shown in fig. 13, where one chip, for example, a baseband processor, is connected to the memory 125 through a bus interface, so as to invoke a program in the memory 125 to perform the network device operation shown in the above method embodiment.

The network-side device may also include a network interface 126, such as a common public radio interface (common public radio interface, CPRI).

Specifically, the network side device 1200 of the embodiment of the present application further includes: instructions or programs stored in the memory 125 and executable on the processor 124, the processor 124 invokes the instructions or programs in the memory 125 to perform the methods performed by the modules shown in fig. 9 and achieve the same technical effects, and are not repeated here.

The embodiment of the application also provides a readable storage medium, on which a program or an instruction is stored, which when executed by a processor, implements each process of the above-mentioned access method embodiment of backscatter communication, and can achieve the same technical effects, and in order to avoid repetition, the description is omitted here.

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

The embodiment of the application further provides a chip, the chip comprises a processor and a communication interface, the communication interface is coupled with the processor, the processor is used for running a program or instructions, the processes of the above-mentioned access method embodiment of the backscatter communication are realized, the same technical effects can be achieved, and the repetition is avoided, and the description is omitted here.

It should be understood that the chips referred to in the embodiments of the present application may also be referred to as system-on-chip chips, or the like.

The embodiments of the present application further provide a computer program/program product stored in a storage medium, where the computer program/program product is executed by at least one processor to implement the respective processes of the above-mentioned access method embodiments of backscatter communications, and achieve the same technical effects, and are not repeated herein.

The embodiment of the application also provides an access system for back scattering communication, which comprises: a first device operable to perform the steps of the access method for backscatter communication as described above, a second device operable to perform the steps of the access method for backscatter communication as described above, and a third device.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element. Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of the present application is not limited to performing the functions in the order shown or discussed, but may also include performing the functions in a substantially simultaneous manner or in an opposite order depending on the functions involved, e.g., the described methods 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.

From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art in the form of a computer software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present application.

The embodiments of the present application have been described above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and many forms may be made by those having ordinary skill in the art without departing from the spirit of the present application and the scope of the claims, which are to be protected by the present application.

Claims

1. An access method for backscatter communications, comprising:

wherein the first command is different from the second command.

2. The method of claim 1, wherein prior to sending the second command to the second device, the method further comprises:

the first device listens for the first command sent by the third device.

3. The method of claim 1, wherein after the first device listens for the first backscatter information transmitted by the second device, the method further comprises:

4. The method of claim 1, wherein after sending the second command to the second device, the method further comprises:

The first device listens for second backscatter information transmitted by the second device, the second backscatter information triggered by the second command, the first backscatter information being different from the second backscatter information.

5. The method of claim 4, wherein after the first device listens for the second backscatter information transmitted by the second device, the method further comprises:

the first device sends second feedback information to the third device, the second feedback information being related to the first backscatter information and/or the second backscatter information.

6. The method of claim 5, wherein the first device sending second feedback information to the third device comprises:

the first equipment sends second feedback information to the third equipment under the condition that the first equipment monitors first back scattering information and/or second back scattering information sent by N pieces of second equipment; wherein N is a positive integer, and the second feedback information is related to the first backscatter information and/or the second backscatter information corresponding to the N second devices.

7. The method of claim 1, wherein the first command or the second command comprises at least one of:

selecting a command;

counting commands;

an access command.

8. The method of claim 1, wherein the second command is for responding to a listening situation of the first backscatter information.

9. The method of claim 1, wherein the first backscatter information comprises at least one of:

identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

10. The method of claim 4, wherein the second backscatter information comprises at least one of:

identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

11. The method of claim 4, wherein prior to monitoring the second backscatter information transmitted by the second device, the method further comprises:

the first device transmits a first excitation carrier for the second device to transmit the second backscatter information.

12. The method of claim 11, wherein the second command is not temporally overlapped with the first excitation carrier.

13. The method of claim 5, wherein the second backscatter information is backscattered from a second excitation carrier, wherein the second excitation carrier is emitted by the third device.

14. The method of claim 1, wherein the first device is one of a network-side device and a terminal, the third device is the other of the network-side device and the terminal, and the second device is a backscatter communication device.

15. An access device for backscatter communications, comprising:

wherein, the first command is different from the second command.

16. An access method for backscatter communications, comprising:

wherein the first feedback information is related to first back-scattered information of a second device, the second feedback information is related to first back-scattered information and/or second back-scattered information of the second device, the first back-scattered information is triggered by a first command, the first command is sent by the third device, the second back-scattered information is triggered by a second command, the second command is sent by the second device, the first command is different from the second command, and the first back-scattered information is different from the second back-scattered information.

17. The method of claim 16, wherein prior to receiving the first feedback information and/or the second feedback information from the first device, the method further comprises:

the third device sends the first command to the second device, where the first command is used to trigger the second device to send the first backscatter information.

18. The method of claim 16, wherein the first command comprises at least one of the following commands:

selecting a command;

Counting commands;

an access command.

19. The method of claim 17, wherein after sending the first command to the second device, the method further comprises:

the third device transmits a second excitation carrier to the second device, the second excitation carrier being used by the second device to transmit the second backscatter information.

20. The method of claim 19, wherein the third device transmits a second stimulus carrier to the second device that satisfies at least one of:

21. The method of claim 20, wherein the first backscatter information or the second backscatter information comprises at least one of:

Identification information of the second device;

electronic product code information of the second device;

handle information of the second device.

22. The method of claim 17, wherein the third device sending the first command to the second device comprises:

the third device sends the first command to N second devices;

23. The method of claim 22, wherein the second feedback information relates to first and/or second backscatter information of the N second devices.

24. An access device for backscatter communications, comprising:

25. A terminal comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, performs the steps of the access method of backscatter communications of any one of claims 1 to 14.

26. A network side device comprising a processor and a memory storing a program or instructions executable on the processor, which when executed by the processor, implement the steps of the access method of backscatter communications of any one of claims 16 to 23.

27. A readable storage medium, characterized in that the readable storage medium has stored thereon a program or instructions which, when executed by a processor, implement the access method of backscatter communication according to any one of claims 1-14 or the steps of the access method of backscatter communication according to any one of claims 16 to 23.