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WO2023231920A1 - Procédé et dispositif de communication de rétrodiffusion - Google Patents

Procédé et dispositif de communication de rétrodiffusion Download PDF

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Publication number
WO2023231920A1
WO2023231920A1 PCT/CN2023/096545 CN2023096545W WO2023231920A1 WO 2023231920 A1 WO2023231920 A1 WO 2023231920A1 CN 2023096545 W CN2023096545 W CN 2023096545W WO 2023231920 A1 WO2023231920 A1 WO 2023231920A1
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WO
WIPO (PCT)
Prior art keywords
feedback information
tag
signal
command
information
Prior art date
Application number
PCT/CN2023/096545
Other languages
English (en)
Chinese (zh)
Inventor
应祚龙
吴凯
李东儒
Original Assignee
维沃移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 维沃移动通信有限公司 filed Critical 维沃移动通信有限公司
Publication of WO2023231920A1 publication Critical patent/WO2023231920A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/40—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by components specially adapted for near-field transmission
    • H04B5/45—Transponders
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/22—Scatter propagation systems, e.g. ionospheric, tropospheric or meteor scatter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Definitions

  • This application belongs to the field of communication technology, and specifically relates to a backscattering communication method and equipment.
  • Backscatter communication is a backscatter communication device that uses radio frequency signals from other devices or the environment to perform signal modulation to transmit its own information.
  • Traditional backscatter communication systems only include readers and tags.
  • Backscatter communication may be supported in the 5th Generation New Radio (5G NR).
  • 5G NR 5th Generation New Radio
  • Embodiments of the present application provide a backscatter communication method and device, which can solve the problem that communication between devices cannot be achieved due to the introduction of backscatter communication in a communication system.
  • a backscatter communication method including: a first device sending a first signal to a tag; the first device receiving second feedback information, the second feedback information being generated by the second device based on the first Feedback information is sent, and the first feedback information is sent by the tag based on the first signal.
  • a backscatter communication method including: a tag receiving a first signal from a first device; and the tag sending first feedback information to a second device according to the first signal.
  • a backscatter communication method including: a second device receiving first feedback information from a tag, the first feedback information being sent by the tag based on a first signal sent by the first device ; The second device sends second feedback information to the first device according to the first feedback information.
  • a backscatter communication method including: a second device receiving a first signal from the first device; when the first signal contains a control command and/or an excitation carrier wave, the The second device listens from The first feedback information on the label.
  • a backscatter communication device applied to a first device, including: a sending module for sending a first signal to a tag; a receiving module for receiving second feedback information, the second feedback The information is sent by the second device based on the first feedback information, and the first feedback information is sent by the tag based on the first signal.
  • a backscatter communication device applied to a tag, including: a receiving module for receiving a first signal from a first device; and a sending module for sending a signal to a second device according to the first signal. The device sends the first feedback information.
  • a backscatter communication device applied to a second device, including: a receiving module configured to receive first feedback information from a tag, where the first feedback information is based on the first The first signal sent by the device is sent; the sending module is configured to send second feedback information to the first device according to the first feedback information.
  • a backscatter communication device applied to a second device, including: a receiving module, configured to receive a first signal from the first device; the receiving module is further configured to: In the case where a signal contains a control command and/or an excitation carrier, the first feedback information from the tag is monitored.
  • a communication device in a ninth aspect, includes a processor and a memory.
  • the memory stores a program 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 any one of the first aspect, the third aspect and the fourth aspect.
  • a communication device including a processor and a communication interface, wherein the processor or the communication interface is used to implement the method described in any one of the first aspect, the third aspect and the fourth aspect. Method steps.
  • a backscatter communication system including: a first device, a tag, and a second device.
  • the first device can be used to perform the steps of the method described in the first aspect.
  • the tag can be In performing the steps of the method as described in the second aspect, the second device may be used to perform the steps of the method as described in the third or fourth 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 implementation of any of the first aspect, the third aspect and the fourth aspect is implemented. A step of the method described.
  • a chip in a thirteenth aspect, 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 first aspect and the third aspect. The steps of the method described in any one of the aspects and the fourth 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 the first aspect, the The steps of the method described in any one of the third aspect and the fourth aspect.
  • the first device sends a first signal to the tag; the first device receives second feedback information, and the second feedback information is sent by the second device based on the first feedback information.
  • the feedback information is sent by the tag based on the first signal.
  • Figure 1 is a schematic diagram of a wireless communication system according to an embodiment of the present application.
  • Figure 2 is a schematic flow chart of a backscatter communication method according to an embodiment of the present application
  • Figure 3 is a schematic diagram of an application scenario of the backscatter communication method according to an embodiment of the present application.
  • Figure 4 is a schematic diagram of an application scenario of the backscatter communication method according to an embodiment of the present application.
  • Figure 5 is a schematic flow chart of a backscatter communication method according to an embodiment of the present application.
  • Figure 6 is a schematic flow chart of a backscatter communication method according to an embodiment of the present application.
  • Figure 7 is a schematic flow chart of a backscatter communication method according to an embodiment of the present application.
  • Figure 8 is a schematic flow chart of a backscatter communication method according to an embodiment of the present application.
  • Figure 9 is a schematic flow chart of a backscatter communication method according to an embodiment of the present application.
  • Figure 10 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • Figure 11 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • Figure 12 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • Figure 13 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • Figure 14 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • Figure 15 is a schematic structural diagram of a terminal according to an embodiment of the present application.
  • Figure 16 is a schematic structural diagram of a network side device according to an embodiment of the present application.
  • 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.
  • the first object can be one or multiple.
  • “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.
  • LTE Long Term Evolution
  • LTE-Advanced, LTE-A Long Term Evolution
  • CDMA Code Division Multiple Access
  • TDMA Time Division Multiple Access
  • FDMA Frequency Division Multiple Access
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single-carrier Frequency Division Multiple Access
  • NR New Radio
  • FIG. 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 can 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 handheld computer, a netbook, or a super mobile personal computer.
  • Tablet Personal Computer Tablet Personal Computer
  • laptop computer laptop computer
  • PDA Personal Digital Assistant
  • PDA Personal Digital Assistant
  • UMPC ultra-mobile personal computer
  • UMPC mobile Internet device
  • MID mobile Internet device
  • augmented reality augmented reality, AR
  • VR virtual reality
  • robots wearable devices
  • Vehicle user equipment VUE
  • pedestrian terminal pedestrian terminal
  • PUE pedestrian terminal
  • smart home home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.
  • game consoles personal computers (personal computer, PC), teller machine or self-service machine and other terminal-side devices.
  • Wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart anklets) bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc.
  • the network side equipment 12 may include access network equipment or core network equipment, where the access network equipment may also be called wireless access network equipment, radio access network (Radio Access Network, RAN), radio access network function or wireless access network unit.
  • Access network equipment can include base stations, Wireless Local Area Network (WLAN) access points or WiFi nodes, etc.
  • the base station can be called Node B, evolved Node B (eNB), access point, base station, etc.
  • BTS Base Transceiver Station
  • BSS Basic Service Set
  • ESS Extended Service Set
  • home B-node home evolved B-node
  • TRP Transmitting Receiving Point
  • 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 taken as an example for introduction, and the specific type of base station is not limited.
  • the embodiment of the present application provides a backscatter communication method 200.
  • the method can be executed by the first device.
  • the method can be executed by software or hardware installed on the first device.
  • the method includes follow the steps below.
  • S202 The first device sends the first signal to the tag.
  • the first device is a network-side device; accordingly, the second device may be a terminal.
  • a typical application scenario is shown in Figure 2.
  • the first device is a terminal; accordingly, the second device may be a network side device.
  • the first device is a terminal; accordingly, the second device may be a network side device.
  • the first signal includes at least one of the following: an excitation carrier signal, a control command, a downlink reference signal, and a synchronization signal.
  • control command may include at least one of the following: selection type command, query type command, access command; wherein the selection type command includes at least one of the following: selection command (a specific selection command), Inventory command, sorting command; the query type command includes at least one of the following: query command (a specific query command), adjustment query command, repeat query command; the access command includes at least one of the following: random request command, Read command, write command, destroy command, lock command, access command, security-related access command, file management-related access command.
  • the Select type (Select) command is necessary. Since tags have multiple attributes, based on the standards and strategies set by the user, using the Select type command to change certain attributes and flags artificially selects or delimits a specific tag group. You can only perform inventory identification or access operations on them, which will help reduce conflicts and repeated identification and speed up identification.
  • the query type command is used to start an inventory.
  • the query command is used to start a round of inventory and determine which tags participate in the round of inventory.
  • the adjustment query command is used to adjust the number of original receiving times (Slots) of the tags.
  • the repeat query command is used to Reduce the number of label slots.
  • the random request (Req_RN) command requires the tag to generate a random number; the read command is used to read data from a certain location in the tag's storage; the write command is used to write data to the tag's storage.
  • the destroy command can leak privacy and the tag can no longer be used; the lock command is used to prevent the tag from being written to, preventing the data from being arbitrarily modified; the access command is used to make the tag open when the tag has a password ( Open) state is converted to the Secure state; security-related access commands are used to ensure tag security; file management-related access commands can be used to manage files within the tag.
  • the first signal includes a query type command, which is used to trigger the query process of M tags; wherein the random numbers generated by the M tags satisfy the query type command.
  • the query condition; the random numbers generated by the M tags are used by the M tags to send the first feedback information, and M is an integer greater than 0.
  • the first device queries M tags, and the first device issues a query type command (i.e., the first signal) for these M tags, in which the random numbers generated by the M tags (for example, 0, 1, ..., M-1) meets the query conditions of the first device, M is an integer greater than 0; these M tags perform backscattering in order according to the size (or small and large) of the random numbers generated by themselves, for example, sending the first feedback Signal etc.
  • a query type command i.e., the first signal
  • the tag can generate a random number and report it to the first device (such as a base station).
  • the base station then sends a random number confirmation command to the tag, and the tag backscatters signals in sequence according to the size of the random number.
  • the tag receives the random number confirmation command as the first reference time, the difference between the backscattering time and the first reference time is the first waiting time, and the difference between the first waiting time and the random number generated by the tag is The size is positively correlated (or anti-correlated), such as a proportional relationship. In this way, the smaller the generated random number, the shorter the waiting time of the label, that is, backscattering is performed first; the larger the generated random number, the longer the waiting time of the label. , that is, backscattering.
  • This embodiment can avoid the situation where the second device cannot detect the first feedback information of any tag due to multiple tags sending the first feedback information at the same time, which is conducive to improving the reception quality of the first feedback information and improving backscatter. Communication system performance.
  • the first device receives second feedback information, the second feedback information is sent by the second device based on the first feedback information, and the first feedback information is sent by the tag based on the first signal.
  • the first device may start to monitor the second feedback information, where the second feedback information is sent by the second device based on the first feedback information sent by the tag.
  • the first signal includes a control command
  • the first device receiving the second feedback information includes: the first device receiving the second feedback information at one of the following times:
  • N is a positive integer.
  • the first device receiving the second feedback information includes: the first device receiving the second feedback information according to the size of the random number generated by the tag.
  • the tag can generate a random number and report it to the first device, and the first device then sends a random number confirmation command to the tag, and the tag backscatters signals in sequence according to the size of the random number.
  • the first device is able to know the size of the random number generated by each tag.
  • the first device uses the time when it sends the random number confirmation command as the second reference time.
  • the difference between the time when the second feedback information is received and the second reference time is The value is the second waiting time.
  • the second waiting time is positively related (or inversely related) to the size of the random number generated by the tag. If it is directly proportional, in this way, the first device first receives the second feedback corresponding to the tag with a small random number. information; and then receive the second feedback information corresponding to the label with a large random number.
  • the second device can aggregate the first feedback information of multiple tags and then generate a piece of second feedback information. In this way, the first device can only receive one piece of second feedback information.
  • the method of the embodiment shown in Figure 2 further includes: triggering the access process when the second feedback information contains electronic product code information of the tag, and the electronic product code information includes, for example, a product code. (Product Code, PC), Electronic Product Code (Electronic Product Code, EPC), etc.
  • the access process is triggered, such as sending a random request (Req_RN). Order.
  • a first device sends a first signal to a tag; the first device receives second feedback information, and the second feedback information is sent by the second device based on the first feedback information. , the first feedback information is sent by the tag based on the first signal.
  • the embodiments of the present application enable backscatter communication to be supported in the communication system and communication between devices, thereby improving the performance of the backscatter communication system.
  • the embodiment of this application is applicable to the scenario of communication between terminal-assisted tags and network-side equipment (such as NR Node B, gNB).
  • the network-side equipment can trigger tag inventory through excitation carrier signals and control commands.
  • the tag sends feedback information to the terminal, and the terminal sends the feedback information of one or more tags to the network side device to complete a complete inventory process, thereby realizing communication in the backscatter communication system supported by 5G NR.
  • the backscatter communication method according to the embodiment of the present application is described in detail above with reference to FIG. 2 .
  • a backscatter communication method according to another embodiment of the present application will be described in detail below with reference to FIG. 5 . It can be understood that the description from the label side is the same as or corresponds to the description from the first device side in the method shown in FIG. 2. To avoid duplication, the relevant description is appropriately omitted.
  • FIG. 5 is a schematic flow chart of the implementation of the backscatter communication method according to the embodiment of the present application, which can be applied to tags. As shown in Figure 5, the method 500 includes the following steps.
  • S502 The tag receives the first signal from the first device.
  • S504 The tag sends first feedback information to the second device according to the first signal.
  • the first device is a network-side device; accordingly, the second device may be a terminal.
  • a typical application scenario is shown in Figure 2.
  • the first device is a terminal; accordingly, the second device may be a network-side device.
  • a typical application scenario is shown in Figure 3.
  • a tag receives a first signal from a first device; the tag sends first feedback information to a second device according to the first signal.
  • the embodiments of the present application enable backscatter communication to be supported in the communication system and communication between devices, thereby improving the performance of the backscatter communication system.
  • the method further includes: if the first signal is an excitation carrier signal, charging the tag according to the excitation carrier signal; wherein the tag does not send the first Feedback.
  • the tag when the first signal includes an excitation carrier, the tag only charges without sending the first feedback information.
  • the first feedback information includes at least one of the following: identification information of the tag, the tag Electronic product code information and handle information.
  • the identification information of the tag includes a random number generated by the tag.
  • the identification information of the tag may be a 16-bit random number representing the identity of the tag.
  • the tag sending the first feedback information to the second device according to the first signal includes: the tag sending the first feedback information to the second device according to the first signal and the random number.
  • the identification information of the tag can be determined by a 16-bit random number generated by the tag. It is assumed here that the random numbers corresponding to tag1, tag2,..., tagM are 0, 1,..., M-1, and the tags are randomly The numbers are backscattered in order of size or small and large, that is, the first feedback information is sent.
  • the tag can generate a random number and report it to the first device (such as a base station).
  • the base station then sends a random number confirmation command to the tag, and the tag backscatters signals in sequence according to the size of the random number.
  • the tag takes the time when the random number confirmation command is received as the first reference time, the difference between the sending time of the first feedback information and the first reference time is the first waiting time, and the first waiting time is equal to the time generated by the tag.
  • the size of the random number is positively correlated (or anti-correlated), such as a direct proportional relationship.
  • the first feedback information is sent at the same time and/or carrier frequency.
  • tags include, for example: fresh food tags (defined as tag0), furniture tags (defined as tag1), office supplies tags (defined as tag2), and so on.
  • tags under the same type include, for example: bed (defined as tag1-0), desk (defined as tag1-1), wardrobe (defined as tag1-2), etc. under the furniture category tag.
  • the multiplexing mode in which the tag sends the first feedback information includes at least one of the following: Time Division Multiplexing (TDM) multiplexing mode, Frequency Division Multiplexing (Frequency Division) Multiplexing, FDM) multiplexing mode.
  • TDM Time Division Multiplexing
  • FDM Frequency Division Multiplexing
  • the tags of different types and/or different tags of the same type send the first feedback information respectively according to the first time interval; in FDM In the multiplexing mode, the tags of different types and/or the different tags of the same type send the first feedback information respectively according to the first frequency domain interval.
  • FIG. 6 is a schematic flowchart of the implementation of the backscatter communication method according to the embodiment of the present application, which can be applied to the second device. As shown in Figure 6, the method 600 includes the following steps.
  • the second device receives first feedback information from the tag, where the first feedback information is sent by the tag based on the first signal sent by the first device.
  • S604 The second device sends second feedback information to the first device according to the first feedback information.
  • the second device receives first feedback information from the tag, and the first feedback information is sent by the tag based on the first signal sent by the first device; The second device sends second feedback information to the first device according to the first feedback information.
  • the embodiments of the present application enable backscatter communication to be supported in the communication system and communication between devices, thereby improving the performance of the backscatter communication system.
  • the second feedback information at least includes the first feedback information, and/or, in the case where the feedback information does not include information related to the tag, the second feedback information includes at least one of the following: information for requesting retransmission of the first signal, a filling message, and the filling message is used to indicate The first feedback information does not include information related to the tag; wherein the information related to the tag includes identification information or electronic product code information of the tag.
  • the second feedback information when the first feedback information includes identification information of a tag or electronic product code information, the second feedback information at least includes the first feedback information.
  • the second feedback information includes at least one of the first signal request retransmission information and the filling message.
  • the explanation of the padding message is as follows: assuming that the tag2 identifier is not received, the corresponding position in the second feedback information is the padding bit, for example, all 0s. Based on the padding bits which are all 0, the network side device can know that tag2 has not The reflected signal means that tag2 does not send the first feedback information, and the network side device can re-send the first signal to tag2.
  • the second feedback information is generated based on the first feedback information of one tag; or, the second feedback information is generated based on the first feedback information of multiple tags. of.
  • the second device can feed back the first feedback information of one tag, or can integrate the first feedback information of multiple tags and feed them back together.
  • the second device receiving the first feedback information from the tag includes: the second device receiving the first feedback information from the tag according to the size of the random number generated by the tag. Feedback.
  • the tag can generate a random number and report it to the first device, and the first device then sends a random number confirmation command to the tag, and the tag backscatters signals in sequence according to the size of the random number.
  • the second device is able to learn the size of the random number generated by each tag and the reception time of the random number confirmation command of each tag.
  • the second device uses the reception time of the random number confirmation command as the third reference time, and the reception time of the first feedback information
  • the difference between the time and the third reference time is the third waiting time.
  • the third waiting time is positively related (or inversely related) to the size of the random number generated by the tag. If it is directly proportional, in this way, the second device receives it first.
  • the first feedback information corresponding to the label with the smaller random number is received; and the first feedback information corresponding to the label with the larger random number is received later.
  • FIG. 7 is a schematic flowchart of the implementation of the backscatter communication method according to the embodiment of the present application, which can be applied to the second device. As shown in Figure 7, the method 700 includes the following steps.
  • S702 The second device receives the first signal from the first device.
  • the first device is a network-side device; accordingly, the second device may be a terminal.
  • a typical application scenario is shown in Figure 2.
  • the first device is a terminal; accordingly, the second device may be a network-side device.
  • a typical application scenario is shown in Figure 3.
  • the first device can send the first signal to the tag, and accordingly, the second device can also receive the first signal.
  • the second device receives the first signal, and the first signal is a control command and/or an excitation carrier
  • the second device knows that the tag needs to send the first feedback information based on the first signal. Therefore, the second device starts to listen to the signal from the second device.
  • the first feedback message of the label can be used to send the first signal to the tag.
  • the second device receives the first signal from the first device; when the first signal contains a control command and/or an excitation carrier, the second device listens The first feedback message from the label.
  • the embodiments of the present application enable backscatter communication to be supported in the communication system and communication between devices, thereby improving the performance of the backscatter communication system.
  • the second device monitoring the first feedback information from the tag includes: monitoring the first feedback information from the tag after receiving the first signal at a specific time interval.
  • the first signal, the first feedback information and the second feedback information are introduced in the above embodiments, and these information will be introduced below.
  • Select The process by which a reader selects a token population for subsequent inventory or cryptographically challenges a token population for subsequent authentication.
  • Select includes the Select and Challenge commands (Select: The process by which an Interrogator selects a Tag population for subsequent inventory or cryptographically challenges a Tag population for subsequent authentication.Select comprises the Select and Challenge commands)
  • Inventory The process by which a reader identifies a tag. The reader transmits query commands in one of four sessions Let’s start a round of counting. One or more tags may respond. The reader detects a single tag reply and requests the PC, optional XPC word, EPC and CRC-16 from the tag. Only one round of inventory operations can be performed in one session at a time. Inventory: The process by which an Interrogator identifies Tags. An Interrogator begins an inventory round by transmitting a Query command in one of four sessions. One or more Tags may reply. The Interrogator detects a single Tag reply and requests the PC, optional XPC word(s), EPC, and CRC-16 from the Tag. An inventory round operates in one and only one session at a time. Inventory comprises multiple commands)
  • Access The process by which a reader processes (reads, writes, verifies, or otherwise processes) a single token. The reader individually identifies and uniquely identifies the tag before accessing it. Access contains several commands.
  • Access The process by which an Interrogator transacts with (reads, writes, authenticates, or otherwise engages with) an individual Tag. An Interrogator singulates and uniquely identifies a Tag prior to access. Access comprises multiple commands).
  • the instructions for the operation of the first device such as Reader are as follows:
  • the first device is gNB and the second device is UE.
  • the first device is UE and the second device is gNB.
  • This embodiment is directed to Figure 8 (left figure). ) to expand the description of the process shown.
  • this inventory includes three tags, namely tag 1 , tag 2 and tag 3 , including the following process.
  • the query process includes the following steps:
  • Step 1 The network side device (gNB) sends the first signal, that is, the query command (such as Query, QueryAdjust, QueryRep) to tag1, tag2, and tag3.
  • the query command such as Query, QueryAdjust, QueryRep
  • Step 2 tag1, tag2, and tag3 generate 16-bit random numbers (assuming here that the random numbers corresponding to tag1, tag2, and tag3 are 0, 1, and 2 respectively), and tags are backscattered in the order of the random numbers, that is, the A feedback information, see RN16 1 , RN16 2 and RN16 3 in Figure 8 .
  • Step 3 The terminal receives the first feedback information and feeds back one or more tag feedback information to the network side device through the uu air interface, that is, the second feedback information, see the RN16 list (1, 2, 3) in Figure 8. It should be noted here that the terminal may not receive the first feedback information due to poor communication links or tag conflicts, and the second feedback information needs to include this situation.
  • Step 4 When the network side device correctly receives the second feedback information, it notifies the tag through the confirmation command (ACK/NACK), see the ACK/NACK list in Figure 8.
  • Step 5 After the Tag receives the ACK, it feeds back the electronic product code (PC/EPC) information, which is received by the terminal. See PC/EPC 1 and PC/EPC 3 in Figure 8. Similarly, the terminal may or may not receive the electronic product code (PC/EPC) information, and the terminal feeds back one or more electronic product code (PC/EPC) information to the network side device. If Tag receives NACK, repeat steps 2-3.
  • PC/EPC electronic product code
  • the access process includes the following steps:
  • Step 6 The network side device sends a random request (Req_RN) command to trigger the process of tag1, tag2, and tag3. See the Req_RN list in Figure 8.
  • Req_RN random request
  • Step 7 Tag sends the handle information (handle) to the terminal as feedback information.
  • Step 8 The terminal feeds back one or more handle information to the network side device, see handle list (1, 3) in Figure 8.
  • Step 9 The network side device sends the command list to the tag.
  • the commands in the query process include Query, QueryAdjust, QueryRep, ACK or NACK, etc.; the commands in the access process include random request (Req_RN) command, read command, write command, destroy command, lock command and Other optional commands; label status includes open, protect or destroy, etc.
  • the inventory may be carried out according to the type of tag.
  • the network side device takes inventory of warehouse tags.
  • Different types of tags refer to fresh food tags (defined as tag0) and furniture tags (defined as tag1). ), office supplies tag (define tag2), the same type of tag refers to the furniture tag including bed (definition tag1-0), desk (definition tag1-1), and wardrobe (definition tag1-2).
  • tag1-0 fresh food tags
  • tag1 furniture tags
  • wardrobe definition tag1-2
  • the first feedback information received by the terminal is divided into two situations:
  • Scenario 1 There is tag information feedback, and the UE acts as a relay.
  • the second feedback must include all the contents of the first feedback information.
  • the UE can only feed back one tag information at a time, or it can perform the feedback after receiving feedback information from multiple tags. Integrate and then package them together and send them to the base station.
  • Scenario 2 No tag information feedback, that is, when the UE does not receive tag feedback or the information is wrong, the UE can tell gNB the situation and request gNB to re-initiate a command process, or it can also include filling information, such as the tag2 identifier. If not received, the corresponding position is filled with bits, such as all 0s. When the network sees all 0s, it knows that tag2 has no reflected signal. In this case, it is not necessarily a retransmission. Maybe there is no tag. The current random number is 2, so There is no tag itself for backscatter transmission.
  • FIG 10 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • the backscatter communication device is applied to a first device.
  • the first device may be a terminal or a network side device.
  • the device 1000 includes the following modules.
  • the sending module 1002 is used to send the first signal to the tag.
  • the receiving module 1004 is configured to receive second feedback information, the second feedback information is sent by the second device based on the first feedback information, and the first feedback information is sent by the tag based on the first signal.
  • the first device sends a first signal to the tag; the first device receives second feedback information, and the second feedback information is sent by the second device based on the first feedback information. Information is sent by the tag based on the first signal.
  • the first signal includes a query type command
  • the query type command is used to trigger the query process of M tags; wherein the random numbers generated by the M tags satisfy the The query condition of the query type command; the random numbers generated by the M tags are used by the M tags to send the first feedback information, and M is an integer greater than 0.
  • the first signal includes a control command
  • the receiving module 1004 is configured to receive the second feedback information at one of the following times: 1) after sending N control commands , N is a positive integer; 2) after sending a specific control command; 3) after sending the control command at a specific time interval.
  • the receiving module 1004 is configured to receive the second feedback information according to the size of the random number generated by the tag.
  • the sending module 1002 is also configured to trigger the access process when the second feedback information contains the electronic product code information of the tag.
  • the device 1000 according to the embodiment of the present application can refer to the process of the method 200 corresponding to the embodiment of the present application, and each unit/module in the device 1000 and the above-mentioned other operations and/or functions are respectively to implement the corresponding process in the method 200, And can achieve the same or equivalent technical effects. For the sake of simplicity, they will not be described again here.
  • FIG 11 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • the backscatter communication device is applied to tags.
  • the device 1100 includes the following modules.
  • the receiving module 1102 is used to receive the first signal from the first device.
  • the sending module 1104 is configured to send first feedback information to the second device according to the first signal.
  • the tag receives a first signal from the first device; the tag sends first feedback information to the second device according to the first signal.
  • the embodiments of the present application enable backscatter communication to be supported in the communication system and communication between devices, thereby improving the performance of the backscatter communication system.
  • it also includes: a processing module, configured to perform charging according to the excitation carrier signal if the first signal is an excitation carrier signal; wherein the sending module does not send the first Feedback.
  • a processing module configured to perform charging according to the excitation carrier signal if the first signal is an excitation carrier signal; wherein the sending module does not send the first Feedback.
  • the first feedback information includes at least one of the following: identification information of the tag, the tag Electronic product code information and handle information.
  • the identification information of the tag includes a random number generated by the tag.
  • the sending module 1104 is configured to send the first feedback information to the second device according to the first signal and the random number.
  • the tags of different types and/or different tags of the same type send the first feedback information at the same time and/or carrier frequency.
  • the multiplexing mode in which the sending module sends the first feedback information includes at least one of the following: TDM multiplexing mode, FDM multiplexing mode.
  • the tags of different types and/or different tags of the same type send the first feedback information respectively according to the first time interval; in FDM In reuse mode, the tags of different types and/or different tags of the same type send the first feedback information respectively according to the first frequency domain interval.
  • the device 1100 according to the embodiment of the present application can refer to the process corresponding to the method 500 of the embodiment of the present application, and each unit/module in the device 1100 and the above-mentioned other operations and/or functions are respectively to implement the corresponding process in the method 500, And can achieve the same or equivalent technical effects. For the sake of simplicity, they will not be described again here.
  • FIG 12 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • the backscatter communication device is applied to a second device.
  • the second device may be a terminal or a network side device.
  • the device 1200 includes the following modules.
  • the receiving module 1202 is configured to receive first feedback information from the tag, where the first feedback information is sent by the tag based on the first signal sent by the first device.
  • the sending module 1204 is configured to send second feedback information to the first device according to the first feedback information.
  • the second device receives the first feedback information from the tag, and the first feedback information is sent by the tag based on the first signal sent by the first device; the second device receives the first feedback information based on the first signal sent by the first device; Feedback information: sending second feedback information to the first device.
  • the second feedback information at least includes the first feedback information, and/or, in the case where the feedback information does not include information related to the tag, the second feedback information includes at least one of the following: information for requesting retransmission of the first signal, a filling message, and the filling message is used to indicate The first feedback information does not include information related to the tag; wherein the information related to the tag includes identification information or electronic product code information of the tag.
  • the device 1200 can refer to the process corresponding to the method 600 of the embodiment of the present application, and each unit/module in the device 1200 and the above-mentioned other operations and/or functions are respectively to implement the corresponding process in the method 600, And can achieve the same or equivalent technical effects. For the sake of simplicity, they will not be described again here.
  • FIG 13 is a schematic structural diagram of a backscatter communication device according to an embodiment of the present application.
  • the backscatter communication device is applied to a second device.
  • the second device may be a terminal or a network side device.
  • the device 1300 includes the following modules.
  • the receiving module 1302 is used to receive the first signal from the first device.
  • the receiving module 1302 is also configured to monitor the first feedback information from the tag when the first signal contains a control command and/or an excitation carrier.
  • the second device receives the first signal from the first device; when the first signal contains a control command and/or an excitation carrier, the second device monitors the first signal from the tag. Feedback.
  • the embodiments of the present application enable backscatter communication to be supported in the communication system and communication between devices, thereby improving the performance of the backscatter communication system.
  • the receiving module 1302 is configured to monitor the first feedback information from the tag after receiving the first signal at a specific time interval.
  • the device 1300 according to the embodiment of the present application can refer to the process corresponding to the method 700 of the embodiment of the present application, and each unit/module in the device 1300 and the above-mentioned other operations and/or functions are respectively to implement the corresponding process in the method 700, And can achieve the same or equivalent technical effects. For the sake of simplicity, they will not be described again here.
  • the 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.
  • 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.
  • NAS Network Attached Storage
  • this embodiment of the present application also provides a communication device 1400, which includes a processor 1401 and a memory 1402.
  • the memory 1402 stores programs or instructions that can be run on the processor 1401, such as , when the communication device 1400 is a terminal, when the program or instruction is executed by the processor 1401, each step of the above backscatter communication method embodiment is implemented, and the same technical effect can be achieved.
  • the communication device 1400 is a network-side device, when the program or instruction is executed by the processor 1401, each step of the above backscatter communication method embodiment is implemented, and the same technical effect can be achieved. To avoid duplication, the details are not repeated here.
  • An embodiment of the present application also provides a terminal, including a processor and a communication interface.
  • the processor or the communication interface is used to implement the steps of the method described in Figure 2, Figure 6 or Figure 7.
  • This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment.
  • Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect.
  • FIG. 15 is a schematic diagram of the hardware structure of a terminal that implements an embodiment of the present application.
  • the terminal 1500 includes but is not limited to: a radio frequency unit 1501, a network module 1502, an audio output unit 1503, an input unit 1504, a sensor 1505, a display unit 1506, a user input unit 1507, an interface unit 1508, a memory 1509, a processor 1510, etc. At least some parts.
  • the terminal 1500 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 1510 through a power management system, thereby managing charging, discharging, and power consumption through the power management system. Management and other functions.
  • the terminal structure shown in FIG. 15 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.
  • the input unit 1504 may include a graphics processing unit (GPU) 15041 and a microphone 15042.
  • the GPU 15041 is used for recording data by an image capture device (such as a camera) in the video capture mode or the image capture mode.
  • the image data obtained from still pictures or videos is processed.
  • the display unit 1506 may include a display panel 15061, which may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like.
  • the user input unit 1507 includes a touch panel 15071 and at least one of other input devices 15072 .
  • Touch panel 15071 also known as touch screen.
  • the touch panel 15071 may include two parts: a touch detection device and a touch controller.
  • Other input devices 15072 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.
  • the radio frequency unit 1501 after receiving the downlink data from the network side device, the radio frequency unit 1501 can transmit it to the processing unit 1501.
  • the processor 1510 performs processing; in addition, the radio frequency unit 1501 can send uplink data to the network side device.
  • the radio frequency unit 1501 includes, but is not limited to, an antenna, amplifier, transceiver, coupler, low noise amplifier, duplexer, etc.
  • Memory 1509 may be used to store software programs or instructions as well as various data.
  • the memory 1509 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.
  • memory 1509 may include volatile memory or nonvolatile memory, or memory 1509 may include both volatile and nonvolatile memory.
  • 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.
  • 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).
  • RAM Random Access Memory
  • SRAM static random access memory
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory Synchronous DRAM, SDRAM
  • Double data rate synchronous dynamic random access memory Double Data Rate SDRAM, DDRSDRAM
  • Enhanced SDRAM, ESDRAM synchronous link dynamic random access memory
  • Synch link DRAM synchronous link dynamic random access memory
  • SLDRAM direct memory bus random access memory
  • the processor 1510 may include one or more processing units; optionally, the processor 1510 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 1510.
  • radio frequency unit 1501 or the processor 1510 can be used to implement the steps of the method described in Figure 2, Figure 6 or Figure 7.
  • the embodiments of the present application enable backscatter communication to be supported in the communication system and communication between devices, thereby improving the performance of the backscatter communication system.
  • the terminal 1500 provided by the embodiment of the present application can also implement each process of the above-mentioned backscatter communication method embodiment, and can achieve the same technical effect. To avoid duplication, the details will not be described here.
  • An embodiment of the present application also provides a network side device, including a processor and a communication interface.
  • the processor or the communication interface is used to implement the steps of the method described in Figure 2, Figure 6 or Figure 7. .
  • This network-side device embodiment corresponds to the above-mentioned network-side device method embodiment.
  • Each implementation process and implementation manner of the above-mentioned method embodiment can be applied to this network-side device embodiment, and can achieve the same technical effect.
  • the embodiment of the present application also provides a network side device.
  • the network side device 1600 includes: an antenna 161 , a radio frequency device 162 , a baseband device 163 , a processor 164 and a memory 165 .
  • the antenna 161 is connected to the radio frequency device 162 .
  • the radio frequency device 162 receives information through the antenna 161 and sends the received information to the baseband device 163 for processing.
  • the baseband device 163 processes the information to be sent and sends it to the radio frequency device 162.
  • the radio frequency device 162 processes the received information and then sends it out through the antenna 161.
  • the method performed by the network side device in the above embodiment can be implemented in the baseband device 163, which includes a baseband processor.
  • the baseband device 163 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 network side device may also include a network interface 166, which is, for example, a common public radio interface (CPRI).
  • a network interface 166 which is, for example, a common public radio interface (CPRI).
  • CPRI common public radio interface
  • the network side device 1600 in this embodiment of the present invention also includes: instructions or programs stored in the memory 165 and executable on the processor 164.
  • the processor 164 calls the instructions or programs in the memory 165 to execute Figures 10 and 12 Or the method of executing each module shown in Figure 13, and achieve the same technical effect. To avoid repetition, it will not be described in detail here.
  • Embodiments of the present application also provide a readable storage medium.
  • Programs or instructions are stored on the readable storage medium.
  • the program or instructions are executed by a processor, each process of the above backscatter communication method embodiment is implemented, and can To achieve the same technical effect, to avoid repetition, we will not repeat them here.
  • 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 backscatter communication method.
  • Each process in the example can achieve the same technical effect. To avoid repetition, we will not repeat it here.
  • 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 backscatter communication method.
  • Each process of the embodiment can achieve the same technical effect, so to avoid repetition, it will not be described again here.
  • An embodiment of the present application also provides a backscatter communication system, including: a first device, a tag, and a second device.
  • the first device can be used to perform the steps of the method as shown in Figure 2.
  • the tag can be used to To perform the steps of the method as shown in Figure 5, the second device may be used to perform the steps of the method as shown in Figure 6 or Figure 7.
  • 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.
  • 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.

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Abstract

Des modes de réalisation de la présente demande se rapportent au domaine technique des communications et divulguent un procédé et un dispositif de communication de rétrodiffusion. Le procédé de communication de rétrodiffusion des modes de réalisation de la présente demande comprend les étapes suivantes : un premier dispositif envoie un premier signal à une étiquette ; le premier dispositif reçoit des deuxièmes informations de rétroaction, les deuxièmes informations de rétroaction étant envoyées par un deuxième dispositif sur la base de premières informations de rétroaction, et les premières informations de rétroaction étant envoyées par l'étiquette sur la base du premier signal.
PCT/CN2023/096545 2022-06-01 2023-05-26 Procédé et dispositif de communication de rétrodiffusion WO2023231920A1 (fr)

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