WO2023231920A1 - 反向散射通信方法及设备 - Google Patents

反向散射通信方法及设备 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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WIPO (PCT)
Prior art keywords
feedback information
tag
signal
command
information
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PCT/CN2023/096545
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English (en)
French (fr)
Inventor
应祚龙
吴凯
李东儒
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Vivo Mobile Communication Co Ltd
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Vivo Mobile Communication Co Ltd
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Publication of WO2023231920A1 publication Critical patent/WO2023231920A1/zh
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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

本申请实施例公开了一种反向散射通信方法及设备，属于通信技术领域，本申请实施例的反向散射通信方法包括：第一设备向标签发送第一信号；所述第一设备接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。

Description

反向散射通信方法及设备
交叉引用
本发明要求在2022年06月01日提交中国专利局、申请号为202210618827.3、发明名称为“反向散射通信方法及设备”的中国专利申请的优先权，该申请的全部内容通过引用结合在本发明中。
技术领域
本申请属于通信技术领域，具体涉及一种反向散射通信方法及设备。
背景技术
反向散射通信是反向散射通信设备利用其它设备或者环境中的射频信号进行信号调制来传输自己信息，传统的反向散射通信系统中仅包含读写器(reader)和标签(tag)。在第五代新空口(5th Generation New Radio，5G NR)中可能支持反向散射通信，然而，在支持反向散射通信后，如何实现设备之间的通信是相关技术中亟需解决的技术问题。
发明内容
本申请实施例提供一种反向散射通信方法及设备，能够解决因在通信系统中引入反向散射通信后，无法实现设备之间的通信的问题。
第一方面，提供了一种反向散射通信方法，包括：第一设备向标签发送第一信号；所述第一设备接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。
第二方面，提供了一种反向散射通信方法，包括：标签接收来自于第一设备的第一信号；所述标签根据所述第一信号向第二设备发送第一反馈信息。
第三方面，提供了一种反向散射通信方法，包括：第二设备接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的；所述第二设备根据所述第一反馈信息，向第一设备发送第二反馈信息。
第四方面，提供了一种反向散射通信方法，包括：第二设备接收来自于第一设备的第一信号；在所述第一信号包含控制命令和/或激励载波的情况下，所述第二设备监听来自 于标签的第一反馈信息。
第五方面，提供了一种反向散射通信装置，应用于第一设备，包括：发送模块，用于向标签发送第一信号；接收模块，用于接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。
第六方面，提供了一种反向散射通信装置，应用于标签，包括：接收模块，用于接收来自于第一设备的第一信号；发送模块，用于根据所述第一信号向第二设备发送第一反馈信息。
第七方面，提供了一种反向散射通信装置，应用于第二设备，包括：接收模块，用于接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的；发送模块，用于根据所述第一反馈信息，向第一设备发送第二反馈信息。
第八方面，提供了一种反向散射通信装置，应用于第二设备，包括：接收模块，用于接收来自于第一设备的第一信号；所述接收模块，还用于在所述第一信号包含控制命令和/或激励载波的情况下，监听来自于标签的第一反馈信息。
第九方面，提供了一种通信设备，该通信设备包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如第一方面，第三方面和第四方面任一项所述的方法的步骤。
第十方面，提供了一种通信设备，包括处理器及通信接口，其中，所述处理器或所述通信接口用于实现如第一方面，第三方面和第四方面任一项所述的方法的步骤。
第十一方面，提供了一种反向散射通信系统，包括：第一设备、标签以及第二设备，所述第一设备可用于执行如第一方面所述的方法的步骤，所述标签可用于执行如第二方面所述的方法的步骤，所述第二设备可用于执行如第三方面或第四方面所述的方法的步骤。
第十二方面，提供了一种可读存储介质，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如第一方面，第三方面和第四方面任一项所述的方法的步骤。
第十三方面，提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现如第一方面，第三方面和第四方面任一项所述的方法的步骤。
第十四方面，提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述计算机程序/程序产品被至少一个处理器执行以实现如第一方面，第三方面和第四方面任一项所述的方法的步骤。
在本申请实施例中，第一设备向标签发送第一信号；所述第一设备接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
附图说明
图1是根据本申请实施例的无线通信系统的示意图；
图2是根据本申请实施例的反向散射通信方法的示意性流程图；
图3是根据本申请实施例的反向散射通信方法的应用场景示意图；
图4是根据本申请实施例的反向散射通信方法的应用场景示意图；
图5是根据本申请实施例的反向散射通信方法的示意性流程图；
图6是根据本申请实施例的反向散射通信方法的示意性流程图；
图7是根据本申请实施例的反向散射通信方法的示意性流程图；
图8是根据本申请实施例的反向散射通信方法的示意性流程图；
图9是根据本申请实施例的反向散射通信方法的示意性流程图；
图10是根据本申请实施例的反向散射通信装置的结构示意图；
图11是根据本申请实施例的反向散射通信装置的结构示意图；
图12是根据本申请实施例的反向散射通信装置的结构示意图；
图13是根据本申请实施例的反向散射通信装置的结构示意图；
图14是根据本申请实施例的通信设备的结构示意图；
图15是根据本申请实施例的终端的结构示意图；
图16是根据本申请实施例的网络侧设备的结构示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本申请保护的范围。
本申请的说明书和权利要求书中的术语“第一”、“第二”等是用于区别类似的对象，而不用于描述特定的顺序或先后次序。应该理解这样使用的术语在适当情况下可以互换，以便本申请的实施例能够以除了在这里图示或描述的那些以外的顺序实施，且“第一”、“第二”所区别的对象通常为一类，并不限定对象的个数，例如第一对象可以是一个，也可以是多个。此外，说明书以及权利要求中“和/或”表示所连接对象的至少其中之一，字符“/”一般表示前后关联对象是一种“或”的关系。
值得指出的是，本申请实施例所描述的技术不限于长期演进型(Long Term Evolution，LTE)/LTE的演进(LTE-Advanced，LTE-A)系统，还可用于其他无线通信系统，诸如码分多址(Code Division Multiple Access，CDMA)、时分多址(Time Division Multiple Access，TDMA)、频分多址(Frequency Division Multiple Access，FDMA)、正交频分多址(Orthogonal  Frequency Division Multiple Access，OFDMA)、单载波频分多址(Single-carrier Frequency Division Multiple Access，SC-FDMA)和其他系统。本申请实施例中的术语“系统”和“网络”常被可互换地使用，所描述的技术既可用于以上提及的系统和无线电技术，也可用于其他系统和无线电技术。以下描述出于示例目的描述了新空口(New Radio，NR)系统，并且在以下大部分描述中使用NR术语，但是这些技术也可应用于NR系统应用以外的应用，如第6代(6th Generation，6G)通信系统。
图1示出本申请实施例可应用的一种无线通信系统的框图。无线通信系统包括终端11和网络侧设备12。其中，终端11可以是手机、平板电脑(Tablet Personal Computer)、膝上型电脑(Laptop Computer)或称为笔记本电脑、个人数字助理(Personal Digital Assistant，PDA)、掌上电脑、上网本、超级移动个人计算机(ultra-mobile personal computer，UMPC)、移动上网装置(Mobile Internet Device，MID)、增强现实(augmented reality，AR)/虚拟现实(virtual reality，VR)设备、机器人、可穿戴式设备(Wearable Device)、车载设备(Vehicle User Equipment，VUE)、行人终端(Pedestrian User Equipment，PUE)、智能家居(具有无线通信功能的家居设备，如冰箱、电视、洗衣机或者家具等)、游戏机、个人计算机(personal computer，PC)、柜员机或者自助机等终端侧设备，可穿戴式设备包括：智能手表、智能手环、智能耳机、智能眼镜、智能首饰(智能手镯、智能手链、智能戒指、智能项链、智能脚镯、智能脚链等)、智能腕带、智能服装等。需要说明的是，在本申请实施例并不限定终端11的具体类型。网络侧设备12可以包括接入网设备或核心网设备，其中，接入网设备也可以称为无线接入网设备、无线接入网(Radio Access Network，RAN)、无线接入网功能或无线接入网单元。接入网设备可以包括基站、无线局域网(Wireless Local Area Network，WLAN)接入点或WiFi节点等，基站可被称为节点B、演进节点B(evolved Node B，eNB)、接入点、基收发机站(Base Transceiver Station，BTS)、无线电基站、无线电收发机、基本服务集(Basic Service Set，BSS)、扩展服务集(Extended Service Set，ESS)、家用B节点、家用演进型B节点、发送接收点(Transmitting Receiving Point，TRP)或所述领域中其他某个合适的术语，只要达到相同的技术效果，所述基站不限于特定技术词汇，需要说明的是，在本申请实施例中仅以NR系统中的基站为例进行介绍，并不限定基站的具体类型。
下面结合附图，通过一些实施例及其应用场景对本申请实施例提供的反向散射通信方法进行详细地说明。
如图2所示，本申请实施例提供一种反向散射通信方法200，该方法可以由第一设备执行，换言之，该方法可以由安装在第一设备的软件或硬件来执行，该方法包括如下步骤。
S202：第一设备向标签(tag)发送第一信号。
在一个实施例中，第一设备是网络侧设备；相应地，第二设备可以是终端，典型的应用场景如图2所示。
在一个实施例中，第一设备是终端；相应地，第二设备可以是网络侧设备，典型的应 用场景如图3所示。
可选地，所述第一信号包括以下至少一项：激励载波信号，控制命令，下行参考信号，同步信号。
可选地，所述控制命令可以包括以下至少一项：选择类型命令，查询类型命令，接入命令；其中，所述选择类型命令包括以下至少一项：选择命令(一个具体的选择命令)，盘点命令，排序命令；所述查询类型命令包括以下至少一项：查询命令(一个具体的查询命令)，调节查询命令，重复查询命令；所述接入命令包括以下至少一项：随机请求命令，读取命令，写入命令，销毁命令，锁定命令，访问命令，安全相关接入命令，文件管理相关接入命令。
选择类型(Select)命令是必备的，由于标签有多种属性，基于用户设定的标准和策略，使用选择类型命令，改变某些属性和标志就人为选择或圈定了一个特定的标签群，可以只对它们进行盘点识别或存取操作，这样有利于减少冲突和重复识别，加快识别速度。
查询类型命令用于开始一次盘点，查询命令用于启动一轮盘点，并决定哪些标记参与该轮盘点；调节查询命令用于将标签原来接收时刻(Slot)的数目进行调整；重复查询命令用于减少标签Slot的数字。
接入命令(Access)中，随机请求(Req_RN)命令要求标签产生一个随机数；读取命令用于从标签的存储中的某个位置读取资料；写入命令用于写入资料到标签的存储中；销毁命令可以隐私的泄漏，标签无法再使用；锁定命令用于标签不能再进行写入的动作，防止资料被任意的串改；访问命令用于当标签拥有密码时候让标签从开启(Open)的状态转成保护(Secure)状态；安全相关接入命令用于保障标签安全；文件管理相关接入命令可以用于对标签内文件进行管理。
在一个实施例中，所述第一信号包括查询类型命令，所述查询类型命令用于触发M个所述标签的查询流程；其中，所述M个标签产生的随机数满足所述查询类型命令的查询条件；所述M个标签产生的随机数用于所述M个标签发送所述第一反馈信息，M为大于0的整数。
该实施例例如，第一设备查询M个标签，第一设备为这M个标签下发一个查询类型命令(即第一信号)，其中，M个标签产生的随机数(例如，0,1,…,M-1)满足第一设备的查询条件，M为大于0的整数；这M个标签根据自身生成的随机数的大小(或小大)顺序进行反向散射，例如，发送第一反馈信号等。
该实施例中，标签可以生成随机数并报告给第一设备(如基站)，基站再发送随机数确认命令给标签，标签根据随机数的大小，按顺序反向散射信号。具体例如，标签以接收到随机数确认命令的时刻为第一参考时刻，反向散射时刻与第一参考时刻之间的差值为第一等待时长，第一等待时长与标签生成的随机数的大小正相关(或反相关)，如成正比例关系，这样，生成的随机数越小的标签的等待时长越短，即先进行反向散射；生成的随机数越大的标签的等待时长越长，即后进行反向散射。
该实施例可以避免由于多个标签同时发送第一反馈信息，而造成的第二设备无法检测出任何标签的第一反馈信息的情况，有利于提升第一反馈信息的接收质量，提升反向散射通信系统的性能。
S204：所述第一设备接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。
该实施例中，第一设备在发送完第一信号后，则可以开始监听第二反馈信息，其中，第二反馈信息由第二设备基于标签发送的第一反馈信息发送。
可选地，所述第一信号包括控制命令，所述第一设备接收第二反馈信息包括：所述第一设备在如下之一的时刻接收所述第二反馈信息：
1)发送N个所述控制命令之后，N为正整数。
2)发送特定的控制命令(如查询命令)之后。
3)发送所述控制命令特定时间间隔之后。
可选地，所述第一设备接收第二反馈信息包括：所述第一设备根据所述标签生成的随机数的大小，接收所述第二反馈信息。
该例子中，标签可以生成随机数并报告给第一设备，第一设备再发送随机数确认命令给标签，标签根据随机数的大小，按顺序反向散射信号。第一设备是能够获知每个标签生成的随机数的大小的，第一设备以发送随机数确认命令的时刻为第二参考时刻，第二反馈信息的接收时刻与第二参考时刻之间的差值为第二等待时长，第二等待时长与标签生成的随机数的大小正相关(或反相关)，如成正比例关系，这样，第一设备先接收到随机数小的标签对应的第二反馈信息；后接收到随机数大的标签对应的第二反馈信息。
在其他的实施例中，第二设备可以汇总多个标签的第一反馈信息，进而生成一条第二反馈信息，这样，第一设备可以仅接收一条第二反馈信息。
可选地，图2所示的实施例的方法还包括：在所述第二反馈信息包含所述标签的电子产品码信息的情况下，触发接入流程，该电子产品码信息例如包括产品码(Product Code，PC)，电子产品码(Electronic Product Code，EPC)等。
该实施例中，在第一设备收到第二设备的第二反馈信息后，在第二反馈信息包含标签的电子产品码信息的情况下，触发接入流程，如，发送随机请求(Req_RN)命令。
本申请实施例提供的反向散射通信方法，第一设备向标签发送第一信号；所述第一设备接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
本申请实施例适用于终端辅助标签与网络侧设备(如NR节点(NR Node B，gNB))之间通信的场景中，具体地，网络侧设备可以通过激励载波信号和控制命令触发标签盘点，标签将反馈信息发送至终端，终端将一个或多个标签的反馈信息发送至网络侧设备，完成一次完整的盘点流程，从而实现5G NR支持的反向散射通信系统的通信。
以上结合图2详细描述了根据本申请实施例的反向散射通信方法。下面将结合图5详细描述根据本申请另一实施例的反向散射通信方法。可以理解的是，从标签侧的描述与图2所示的方法中的第一设备侧的描述相同或相对应，为避免重复，适当省略相关描述。
图5是本申请实施例的反向散射通信方法实现流程示意图，可以应用在标签。如图5所示，该方法500包括如下步骤。
S502：标签接收来自于第一设备的第一信号。
S504：所述标签根据所述第一信号向第二设备发送第一反馈信息。
在一个实施例中，第一设备是网络侧设备；相应地，第二设备可以是终端，典型的应用场景如图2所示。
在一个实施例中，第一设备是终端；相应地，第二设备可以是网络侧设备，典型的应用场景如图3所示。
本申请实施例提供的反向散射通信方法，标签接收来自于第一设备的第一信号；所述标签根据所述第一信号向第二设备发送第一反馈信息。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
可选地，作为一个实施例，所述方法还包括：若所述第一信号为激励载波信号，则所述标签根据所述激励载波信号进行充电；其中，所述标签不发送所述第一反馈信息。
该实施例中，在第一信号包括激励载波的情况下，标签只进行充电，而不发送第一反馈信息。
可选地，作为一个实施例，在所述第一信号包括控制命令和/或随机请求命令的情况下，所述第一反馈信息包含以下至少一项：所述标签的标识信息，所述标签的电子产品码信息，句柄信息。
可选地，所述标签的标识信息包括所述标签生成的随机数，例如，标签的标识信息可以是代表标签身份的16-比特(bit)的随机数。
可选地，所述标签根据所述第一信号向第二设备发送第一反馈信息包括：所述标签根据所述第一信号以及所述随机数，向第二设备发送第一反馈信息。
该实施例中，标签的标识信息可以由标签产生16-bit的随机数确定，此处假设tag1、tag2、…、tagM分别对应的随机数为0、1、…、M-1，标签按照随机数的大小顺序或小大顺序进行反向散射，即发送第一反馈信息。
该实施例例如，标签可以生成随机数并报告给第一设备(如基站)，基站再发送随机数确认命令给标签，标签根据随机数的大小，按顺序反向散射信号。具体地，标签以接收到随机数确认命令的时刻为第一参考时刻，第一反馈信息的发送时刻与第一参考时刻之间的差值为第一等待时长，第一等待时长与标签生成的随机数的大小正相关(或反相关)，如成正比例关系，这样，生成的随机数越小的标签的等待时长越短，即先发出第一反馈信息；生成的随机数越大的标签的等待时长越长，即后发出第一反馈信息。
可选地，作为一个实施例，不同类型的所述标签和/或同一类型下不同的所述标签， 在相同的时刻和/或载频下发送所述第一反馈信息。
该实施例中，不同类型的标签例如包括：生鲜类tag(定义为tag0)、家具类tag(定义为tag1)、办公用品类tag(定义tag2)等等。同一类型下不同的标签例如包括：家具类tag下的床(定义tag1-0)、书桌(定义tag1-1)、衣柜(定义tag1-2)等等。
可选地，作为一个实施例，所述标签发送所述第一反馈信息的复用模式至少包含以下一项：时分复用(Time Division Multiplexing，TDM)复用模式，频分复用(Frequency Division Multiplexing，FDM)复用模式。
可选地，作为一个实施例，在TDM复用模式下，不同类型的所述标签和/或同一类型下不同的所述标签，按照第一时间间隔分别发送所述第一反馈信息；在FDM复用模式下，不同类型的所述标签和/或同一类型下不同的所述标签，按照第一频域间隔分别发送所述第一反馈信息。
图6是本申请实施例的反向散射通信方法实现流程示意图，可以应用在第二设备。如图6所示，该方法600包括如下步骤。
S602：第二设备接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的。
S604：所述第二设备根据所述第一反馈信息，向第一设备发送第二反馈信息。
本申请实施例提供的反向散射通信方法，第二设备接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的；所述第二设备根据所述第一反馈信息，向第一设备发送第二反馈信息。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
可选地，作为一个实施例，在所述第一反馈信息包含所述标签的相关信息的情况下，所述第二反馈信息至少包含所述第一反馈信息，和/或，在所述第一反馈信息不包含所述标签的相关信息的情况下，所述第二反馈信息包含如下至少之一：用于请求重传所述第一信号的信息、填充消息，所述填充消息用于指示所述第一反馈信息不包含所述标签的相关信息；其中，所述标签的相关信息包括所述标签的标识信息或电子产品码信息。
该实施例例如，在第一反馈信息包含标签的标识信息或电子产品码信息的情况下，第二反馈信息至少包含第一反馈信息。在第一反馈信息中没有标签的相关信息的情况下，第二反馈信息至少包含第一信号请求重传信息、填充消息中的一项。其中，填充消息的解释如下：假设tag2的标识没收到，则第二反馈信息中对应的位置为填充比特，例如全0，网络侧设备基于这个全是0的填充比特，也就可以知道tag2没有反射信号，即tag2没有发送第一反馈信息，网络侧设备可以重新向tag2发送第一信号。
可选地，作为一个实施例，所述第二反馈信息是根据一个所述标签的第一反馈信息生成的；或者，所述第二反馈信息是根据多个所述标签的第一反馈信息生成的。
该实施中，第二设备可以反馈一个标签的第一反馈信息，也可以将多个标签的第一反馈信息整合后一起反馈。
可选地，作为一个实施例，所述第二设备接收来自于标签的第一反馈信息包括：所述第二设备根据所述标签生成的随机数的大小，接收来自于所述标签的第一反馈信息。
该例子中，标签可以生成随机数并报告给第一设备，第一设备再发送随机数确认命令给标签，标签根据随机数的大小，按顺序反向散射信号。第二设备是能够获知每个标签生成的随机数的大小以及每个标签随机数确认命令的接收时刻，第二设备以随机数确认命令的接收时刻为第三参考时刻，第一反馈信息的接收时刻与第三参考时刻之间的差值为第三等待时长，第三等待时长与标签生成的随机数的大小正相关(或反相关)，如成正比例关系，这样，第二设备先接收到随机数越小的标签对应的第一反馈信息；后接收到随机数越大的标签对应的第一反馈信息。
图7是本申请实施例的反向散射通信方法实现流程示意图，可以应用在第二设备。如图7所示，该方法700包括如下步骤。
S702：第二设备接收来自于第一设备的第一信号。
S704：在所述第一信号包含控制命令和/或激励载波的情况下，所述第二设备监听来自于标签的第一反馈信息。
在一个实施例中，第一设备是网络侧设备；相应地，第二设备可以是终端，典型的应用场景如图2所示。
在一个实施例中，第一设备是终端；相应地，第二设备可以是网络侧设备，典型的应用场景如图3所示。
该实施例中，第一设备可以向标签发送第一信号，相应地，第二设备也可以接收到第一信号。在第二设备接收到第一信号，第一信号为控制命令和/或激励载波的情况下，第二设备知道标签需要基于第一信号发送第一反馈信息，因此，第二设备开始监听来自于标签的第一反馈信息。
本申请实施例提供的反向散射通信方法，第二设备接收来自于第一设备的第一信号；在所述第一信号包含控制命令和/或激励载波的情况下，所述第二设备监听来自于标签的第一反馈信息。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
可选地，作为一个实施例，所述第二设备监听来自于标签的第一反馈信息包括：在接收所述第一信号特定时间间隔之后，监听来自于标签的第一反馈信息。
以上实施例中介绍了第一信号，第一反馈信息以及第二反馈信息，以下将对这些信息的进行介绍。
选择：读取器为后续清点选择标记填充或以加密方式质询标记填充以进行后续身份验证的过程。Select包括Select和Challenge命令(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)
盘点：读取器识别标签的过程。读取器通过在四个会话中的一个会话中传输查询命令 来开始一轮清点。一个或多个标记可能会应答。读取器检测到单个标签回复，并从标签请求PC、可选XPC字、EPC和CRC-16。一次只能在一个会话中进行一轮盘点操作。资源清册包含多个命令(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-16from the Tag.An inventory round operates in one and only one session at a time.Inventory comprises multiple commands)
访问：读取器处理(读、写、验证或以其他方式处理)单个标记的过程。读取器在访问之前单独识别并唯一识别标签。Access包含多个命令。(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)。
第一设备如读取器(Reader)操作的指令如下：







为详细说明本申请实施例提供的反向散射通信方法，以下将结合几个具体的实施例进行说明。
实施例一
如图8所示，图8左侧图中，第一设备为gNB，第二设备为UE，右侧图中第一设备为UE，第二设备为gNB，本实施例针对图8(左图)所示流程展开描述。
假设本次盘点3个tag，分别为tag1，tag2和tag3，包括以下流程。
查询流程，包括如下步骤：
步骤1：网络侧设备(gNB)发送第一信号，即查询命令(如Query，QueryAdjust,QueryRep)到tag1、tag2、tag3。
步骤2：tag1、tag2、tag3产生16-bit的随机数(此处假设tag1、tag2、tag3分别对应的随机数为0、1、2)，tag按照随机数的顺序进行反向散射，即第一反馈信息，见图8中的RN161，RN162和RN163。
步骤3：终端接收第一反馈信息，将一个或多个tag反馈信息通过uu空口反馈到网络侧设备，即第二反馈信息，见图8中的RN16列表(1，2，3)。此处需要说明的是，终端可能由于通信链路差或者tag冲突等原因收不到第一反馈信息，则第二反馈信息需要包含该情况。
步骤4：网络侧设备正确接收到第二反馈信息时，通过确认命令(ACK/NACK)告知tag，见图8中的ACK/NACK列表。
步骤5：Tag收到ACK后，反馈电子产品码(PC/EPC)信息，由终端接收，见图8中的PC/EPC1和PC/EPC3。同理，终端可能接收到也可能未接收到该电子产品码(PC/EPC)信息，终端将一个或多个电子产品码(PC/EPC)信息反馈到网络侧设备。若Tag收到NACK，则重复第2-3步。
接入流程，包括如下步骤：
步骤6：网络侧设备发送随机请求(Req_RN)命令来触发tag1、tag2、tag3的流程，见图8中的Req_RN列表。
步骤7：Tag将句柄信息(handle)作为反馈信息发送至终端。
步骤8：终端将一个或多个句柄信息反馈到网络侧设备，见图8中的handle列表(1，3)。
步骤9：网络侧设备向标签发送命令列表。
盘点单个tag流程与图8类似，具体的流程如图9所示。
该实施例中，查询流程中的命令包括Query，QueryAdjust，QueryRep，ACK或NACK等；接入流程中的命令包括随机请求(Req_RN)命令，读取命令，写入命令，销毁命令，锁定命令以及其他可选命令；标签状态包括开启，保护或销毁等。
实施例二
网络侧设备盘点tag的时候可能会根据tag的类型展开盘点，具体地，网络侧设备盘点仓库tag，其中不同类型tag指的是生鲜类tag(定义为tag0)、家具类tag(定义为tag1)、办公用品类tag(定义tag2)，同一类型tag指的是在家具类tag下包含床(定义tag1-0)、书桌(定义tag1-1)、衣柜(定义tag1-2)。本次盘点流程若盘点同一类型tag，即家具类tag，则tag1-0、tag1-1、tag1-2可以同一时刻或同一载频下一起反馈；或者，采用TDM、FDM复用模式反馈，盘点不同类型tag同理。
实施例三
终端接收的第一反馈信息后分成两种情况：
情况一：有tag信息反馈，UE相当于中继，第二反馈要包含第一反馈信息的所有内容，UE可以一次只反馈一个tag的信息，也可以在接收到多个tag的反馈信息后进行整合，然后一起打包发送给基站。
情况二：无tag信息反馈，即UE未收到tag反馈或信息错误的情况下，UE可以将该情况告诉gNB，请求gNB重新发起一次命令流程，或者，也可以包含填充信息，例如tag2的标识没收到，对应的位置填充比特，例如全0，网络看到这个全0也就知道tag2没有反射信号，在这种情况下不一定是重传，也许就没有tag目前的随机数是2，所以本身也没有tag进行反向散射传输。
图10是根据本申请实施例的反向散射通信装置的结构示意图，该反向散射通信装置应用于第一设备，第一设备可以是终端或网络侧设备。如图10所示，装置1000包括如下模块。
发送模块1002，用于向标签发送第一信号。
接收模块1004，用于接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。
本申请实施例中，第一设备向标签发送第一信号；所述第一设备接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
可选地，作为一个实施例，所述第一信号包括查询类型命令，所述查询类型命令用于触发M个所述标签的查询流程；其中，所述M个标签产生的随机数满足所述查询类型命令的查询条件；所述M个标签产生的随机数用于所述M个标签发送所述第一反馈信息，M为大于0的整数。
可选地，作为一个实施例，所述第一信号包括控制命令，所述接收模块1004，用于在如下之一的时刻接收所述第二反馈信息：1)发送N个所述控制命令之后，N为正整数；2)发送特定的控制命令之后；3)发送所述控制命令特定时间间隔之后。
可选地，作为一个实施例，所述接收模块1004，用于根据所述标签生成的随机数的大小，接收所述第二反馈信息。
可选地，作为一个实施例，所述发送模块1002，还用于在所述第二反馈信息包含所述标签的电子产品码信息的情况下，触发接入流程。
根据本申请实施例的装置1000可以参照对应本申请实施例的方法200的流程，并且，该装置1000中的各个单元/模块和上述其他操作和/或功能分别为了实现方法200中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图11是根据本申请实施例的反向散射通信装置的结构示意图，该反向散射通信装置应用于标签，如图11所示，装置1100包括如下模块。
接收模块1102，用于接收来自于第一设备的第一信号。
发送模块1104，用于根据所述第一信号向第二设备发送第一反馈信息。
本申请实施例中，标签接收来自于第一设备的第一信号；所述标签根据所述第一信号向第二设备发送第一反馈信息。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
可选地，作为一个实施例，还包括：处理模块，用于若所述第一信号为激励载波信号，则根据所述激励载波信号进行充电；其中，所述发送模块不发送所述第一反馈信息。
可选地，作为一个实施例，在所述第一信号包括控制命令和/或随机请求命令的情况下，所述第一反馈信息包含以下至少一项：所述标签的标识信息，所述标签的电子产品码信息，句柄信息。
可选地，作为一个实施例，所述标签的标识信息包括所述标签生成的随机数。
可选地，作为一个实施例，所述发送模块1104，用于根据所述第一信号以及所述随机数，向第二设备发送第一反馈信息。
可选地，作为一个实施例，不同类型的所述标签和/或同一类型下不同的所述标签，在相同的时刻和/或载频下发送所述第一反馈信息。
可选地，作为一个实施例，所述发送模块发送所述第一反馈信息的复用模式至少包含以下一项：TDM复用模式，FDM复用模式。
可选地，作为一个实施例，在TDM复用模式下，不同类型的所述标签和/或同一类型下不同的所述标签，按照第一时间间隔分别发送所述第一反馈信息；在FDM复用模式下， 不同类型的所述标签和/或同一类型下不同的所述标签，按照第一频域间隔分别发送所述第一反馈信息。
根据本申请实施例的装置1100可以参照对应本申请实施例的方法500的流程，并且，该装置1100中的各个单元/模块和上述其他操作和/或功能分别为了实现方法500中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图12是根据本申请实施例的反向散射通信装置的结构示意图，该反向散射通信装置应用于第二设备，第二设备可以是终端或网络侧设备。如图12所示，装置1200包括如下模块。
接收模块1202，用于接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的。
发送模块1204，用于根据所述第一反馈信息，向第一设备发送第二反馈信息。
本申请实施例中，第二设备接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的；所述第二设备根据所述第一反馈信息，向第一设备发送第二反馈信息。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
可选地，作为一个实施例，在所述第一反馈信息包含所述标签的相关信息的情况下，所述第二反馈信息至少包含所述第一反馈信息，和/或，在所述第一反馈信息不包含所述标签的相关信息的情况下，所述第二反馈信息包含如下至少之一：用于请求重传所述第一信号的信息、填充消息，所述填充消息用于指示所述第一反馈信息不包含所述标签的相关信息；其中，所述标签的相关信息包括所述标签的标识信息或电子产品码信息。
根据本申请实施例的装置1200可以参照对应本申请实施例的方法600的流程，并且，该装置1200中的各个单元/模块和上述其他操作和/或功能分别为了实现方法600中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
图13是根据本申请实施例的反向散射通信装置的结构示意图，该反向散射通信装置应用于第二设备，该第二设备可以是终端或网络侧设备。如图13所示，装置1300包括如下模块。
接收模块1302，用于接收来自于第一设备的第一信号。
所述接收模块1302，还用于在所述第一信号包含控制命令和/或激励载波的情况下，监听来自于标签的第一反馈信息。
本申请实施例中，第二设备接收来自于第一设备的第一信号；在所述第一信号包含控制命令和/或激励载波的情况下，所述第二设备监听来自于标签的第一反馈信息。本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
可选地，作为一个实施例，所述接收模块1302，用于在接收所述第一信号特定时间间隔之后，监听来自于标签的第一反馈信息。
根据本申请实施例的装置1300可以参照对应本申请实施例的方法700的流程，并且，该装置1300中的各个单元/模块和上述其他操作和/或功能分别为了实现方法700中的相应流程，并且能够达到相同或等同的技术效果，为了简洁，在此不再赘述。
本申请实施例中的装置可以是电子设备，例如具有操作系统的电子设备，也可以是电子设备中的部件，例如集成电路或芯片。该电子设备可以是终端，也可以为除终端之外的其他设备。示例性的，终端可以包括但不限于上述所列举的终端11的类型，其他设备可以为服务器、网络附属存储器(Network Attached Storage，NAS)等，本申请实施例不作具体限定。
可选的，如图14所示，本申请实施例还提供一种通信设备1400，包括处理器1401和存储器1402，存储器1402上存储有可在所述处理器1401上运行的程序或指令，例如，该通信设备1400为终端时，该程序或指令被处理器1401执行时实现上述反向散射通信方法实施例的各个步骤，且能达到相同的技术效果。该通信设备1400为网络侧设备时，该程序或指令被处理器1401执行时实现上述反向散射通信方法实施例的各个步骤，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供一种终端，包括处理器和通信接口，所述处理器或所述通信接口用于实现如图2，图6或图7所述的方法的步骤。该终端实施例与上述终端侧方法实施例对应，上述方法实施例的各个实施过程和实现方式均可适用于该终端实施例中，且能达到相同的技术效果。具体地，图15为实现本申请实施例的一种终端的硬件结构示意图。
该终端1500包括但不限于：射频单元1501、网络模块1502、音频输出单元1503、输入单元1504、传感器1505、显示单元1506、用户输入单元1507、接口单元1508、存储器1509以及处理器1510等中的至少部分部件。
本领域技术人员可以理解，终端1500还可以包括给各个部件供电的电源(比如电池)，电源可以通过电源管理系统与处理器1510逻辑相连，从而通过电源管理系统实现管理充电、放电、以及功耗管理等功能。图15中示出的终端结构并不构成对终端的限定，终端可以包括比图示更多或更少的部件，或者组合某些部件，或者不同的部件布置，在此不再赘述。
应理解的是，本申请实施例中，输入单元1504可以包括图形处理单元(Graphics Processing Unit，GPU)15041和麦克风15042，GPU15041对在视频捕获模式或图像捕获模式中由图像捕获装置(如摄像头)获得的静态图片或视频的图像数据进行处理。显示单元1506可包括显示面板15061，可以采用液晶显示器、有机发光二极管等形式来配置显示面板15061。用户输入单元1507包括触控面板15071以及其他输入设备15072中的至少一种。触控面板15071，也称为触摸屏。触控面板15071可包括触摸检测装置和触摸控制器两个部分。其他输入设备15072可以包括但不限于物理键盘、功能键(比如音量控制按键、开关按键等)、轨迹球、鼠标、操作杆，在此不再赘述。
本申请实施例中，射频单元1501接收来自网络侧设备的下行数据后，可以传输给处 理器1510进行处理；另外，射频单元1501可以向网络侧设备发送上行数据。通常，射频单元1501包括但不限于天线、放大器、收发信机、耦合器、低噪声放大器、双工器等。
存储器1509可用于存储软件程序或指令以及各种数据。存储器1509可主要包括存储程序或指令的第一存储区和存储数据的第二存储区，其中，第一存储区可存储操作系统、至少一个功能所需的应用程序或指令(比如声音播放功能、图像播放功能等)等。此外，存储器1509可以包括易失性存储器或非易失性存储器，或者，存储器1509可以包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDRSDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(Synch link DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DRRAM)。本申请实施例中的存储器1509包括但不限于这些和任意其它适合类型的存储器。
处理器1510可包括一个或多个处理单元；可选的，处理器1510集成应用处理器和调制解调处理器，其中，应用处理器主要处理涉及操作系统、用户界面和应用程序等的操作，调制解调处理器主要处理无线通信信号，如基带处理器。可以理解的是，上述调制解调处理器也可以不集成到处理器1510中。
其中，射频单元1501或处理器1510可以用于实现如图2，图6或图7所述的方法的步骤。
本申请实施例实现了在通信系统中支持反向散射通信，并实现了设备之间的通信，便于提升反向散射通信系统的性能。
本申请实施例提供的终端1500还可以实现上述反向散射通信方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供一种网络侧设备，包括处理器和通信接口，所述处理器或所述通信接口用于实现如图2，图6或图7所述的方法的步骤。。该网络侧设备实施例与上述网络侧设备方法实施例对应，上述方法实施例的各个实施过程和实现方式均可适用于该网络侧设备实施例中，且能达到相同的技术效果。
具体地，本申请实施例还提供了一种网络侧设备。如图16所示，该网络侧设备1600包括：天线161、射频装置162、基带装置163、处理器164和存储器165。天线161与射频装置162连接。在上行方向上，射频装置162通过天线161接收信息，将接收的信息发送给基带装置163进行处理。在下行方向上，基带装置163对要发送的信息进行处理，并发送给射频装置162，射频装置162对收到的信息进行处理后经过天线161发送出去。
以上实施例中网络侧设备执行的方法可以在基带装置163中实现，该基带装置163包括基带处理器。
基带装置163例如可以包括至少一个基带板，该基带板上设置有多个芯片，如图16所示，其中一个芯片例如为基带处理器，通过总线接口与存储器165连接，以调用存储器165中的程序，执行以上方法实施例中所示的网络设备操作。
该网络侧设备还可以包括网络接口166，该接口例如为通用公共无线接口(common public radio interface，CPRI)。
具体地，本发明实施例的网络侧设备1600还包括：存储在存储器165上并可在处理器164上运行的指令或程序，处理器164调用存储器165中的指令或程序执行图10，图12或图13所示各模块执行的方法，并达到相同的技术效果，为避免重复，故不在此赘述。
本申请实施例还提供一种可读存储介质，所述可读存储介质上存储有程序或指令，该程序或指令被处理器执行时实现上述反向散射通信方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
其中，所述处理器为上述实施例中所述的终端中的处理器。所述可读存储介质，包括计算机可读存储介质，如计算机只读存储器ROM、随机存取存储器RAM、磁碟或者光盘等。
本申请实施例另提供了一种芯片，所述芯片包括处理器和通信接口，所述通信接口和所述处理器耦合，所述处理器用于运行程序或指令，实现上述反向散射通信方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
本申请实施例另提供了一种计算机程序/程序产品，所述计算机程序/程序产品被存储在存储介质中，所述计算机程序/程序产品被至少一个处理器执行以实现上述反向散射通信方法实施例的各个过程，且能达到相同的技术效果，为避免重复，这里不再赘述。
本申请实施例还提供了一种反向散射通信系统，包括：第一设备、标签以及第二设备，所述第一设备可用于执行如图2所述的方法的步骤，所述标签可用于执行如图5所述的方法的步骤，所述第二设备可用于执行如图6或图7所述的方法的步骤。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。此外，需要指出的是，本申请实施方式中的方法和装置的范围不限按示出或讨论的顺序来执行功能，还可包括根据所涉及的功能按基本同时的方式或按相反的顺序来执行功能，例如，可以按不同于所描述的次序来执行所描述的方法，并且还可以添加、省去、或组合各种步骤。另外， 参照某些示例所描述的特征可在其他示例中被组合。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以计算机软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本申请各个实施例所述的方法。
上面结合附图对本申请的实施例进行了描述，但是本申请并不局限于上述的具体实施方式，上述的具体实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本申请的启示下，在不脱离本申请宗旨和权利要求所保护的范围情况下，还可做出很多形式，均属于本申请的保护之内。

Claims (39)

  1. 一种反向散射通信方法，其中，包括：
    第一设备向标签发送第一信号；
    所述第一设备接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。
  2. 根据权利要求1所述的方法，其中，所述第一信号包括以下至少一项：激励载波信号，控制命令，下行参考信号，同步信号。
  3. 根据权利要求2所述的方法，其中，所述控制命令包括以下至少一项：选择类型命令，查询类型命令，接入命令；
    其中，所述选择类型命令包括以下至少一项：选择命令，盘点命令，排序命令；
    所述查询类型命令包括以下至少一项：查询命令，调节查询命令，重复查询命令；
    所述接入命令包括以下至少一项：随机请求命令，读取命令，写入命令，销毁命令，锁定命令，访问命令，安全相关接入命令，文件管理相关接入命令。
  4. 根据权利要求1所述的方法，其中，所述第一信号包括查询类型命令，所述查询类型命令用于触发M个所述标签的查询流程；
    其中，所述M个标签产生的随机数满足所述查询类型命令的查询条件；所述M个标签产生的随机数用于所述M个标签发送所述第一反馈信息，M为大于0的整数。
  5. 根据权利要求1所述的方法，其中，所述第一信号包括控制命令，所述第一设备接收第二反馈信息包括：所述第一设备在如下之一的时刻接收所述第二反馈信息：
    发送N个所述控制命令之后，N为正整数；
    发送特定的控制命令之后；
    发送所述控制命令特定时间间隔之后。
  6. 根据权利要求1所述的方法，其中，所述第一设备接收第二反馈信息包括：
    所述第一设备根据所述标签生成的随机数的大小，接收所述第二反馈信息。
  7. 根据权利要求1所述的方法，其中，所述方法还包括：
    在所述第二反馈信息包含所述标签的电子产品码信息的情况下，触发接入流程。
  8. 根据权利要求1所述的方法，其中，
    所述第一设备为网络侧设备，所述第二设备为终端；或者，
    所述第一设备为终端，所述第二设备为网络侧设备。
  9. 一种反向散射通信方法，其中，包括：
    标签接收来自于第一设备的第一信号；
    所述标签根据所述第一信号向第二设备发送第一反馈信息。
  10. 根据权利要求9所述的方法，其中，在所述第一信号包括控制命令和/或随机请求命令的情况下，所述第一反馈信息包含以下至少一项：
    所述标签的标识信息，所述标签的电子产品码信息，句柄信息。
  11. 根据权利要求10所述的方法，其中，所述标签的标识信息包括所述标签生成的随机数。
  12. 根据权利要求11所述的方法，其中，所述标签根据所述第一信号向第二设备发送第一反馈信息包括：
    所述标签根据所述第一信号以及所述随机数，向第二设备发送第一反馈信息。
  13. 根据权利要求9所述的方法，其中，不同类型的所述标签和/或同一类型下不同的所述标签，在相同的时刻和/或载频下发送所述第一反馈信息。
  14. 根据权利要求9所述的方法，其中，所述标签发送所述第一反馈信息的复用模式至少包含以下一项：时分复用TDM复用模式，频分复用FDM复用模式。
  15. 根据权利要求14所述的方法，其中，
    在TDM复用模式下，不同类型的所述标签和/或同一类型下不同的所述标签，按照第一时间间隔分别发送所述第一反馈信息；
    在FDM复用模式下，不同类型的所述标签和/或同一类型下不同的所述标签，按照第一频域间隔分别发送所述第一反馈信息。
  16. 一种反向散射通信方法，其中，包括：
    第二设备接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的；
    所述第二设备根据所述第一反馈信息，向第一设备发送第二反馈信息。
  17. 根据权利要求16所述的方法，其中，
    在所述第一反馈信息包含所述标签的相关信息的情况下，所述第二反馈信息至少包含所述第一反馈信息；和/或
    在所述第一反馈信息不包含所述标签的相关信息的情况下，所述第二反馈信息包含如下至少之一：用于请求重传所述第一信号的信息、填充消息，所述填充消息用于指示所述第一反馈信息不包含所述标签的相关信息；
    其中，所述标签的相关信息包括所述标签的标识信息或电子产品码信息。
  18. 根据权利要求16所述的方法，其中，
    所述第二反馈信息是根据一个所述标签的第一反馈信息生成的；或者，
    所述第二反馈信息是根据多个所述标签的第一反馈信息生成的。
  19. 根据权利要求16所述的方法，其中，所述第二设备接收来自于标签的第一反馈信息包括：
    所述第二设备根据所述标签生成的随机数的大小，接收来自于所述标签的第一反馈信息。
  20. 一种反向散射通信方法，其中，包括：
    第二设备接收来自于第一设备的第一信号；
    在所述第一信号包含控制命令和/或激励载波的情况下，所述第二设备监听来自于标 签的第一反馈信息。
  21. 根据权利要求20所述的方法，其中，所述第二设备监听来自于标签的第一反馈信息包括：在接收所述第一信号特定时间间隔之后，监听来自于标签的第一反馈信息。
  22. 一种反向散射通信装置，应用于第一设备，其中，包括：
    发送模块，用于向标签发送第一信号；
    接收模块，用于接收第二反馈信息，所述第二反馈信息是第二设备基于第一反馈信息发送的，所述第一反馈信息是所述标签基于所述第一信号发送的。
  23. 根据权利要求22所述的装置，其中，所述第一信号包括查询类型命令，所述查询类型命令用于触发M个所述标签的查询流程；
    其中，所述M个标签产生的随机数满足所述查询类型命令的查询条件；所述M个标签产生的随机数用于所述M个标签发送所述第一反馈信息，M为大于0的整数。
  24. 根据权利要求22所述的装置，其中，所述第一信号包括控制命令，所述接收模块，用于在如下之一的时刻接收所述第二反馈信息：
    发送N个所述控制命令之后，N为正整数；
    发送特定的控制命令之后；
    发送所述控制命令特定时间间隔之后。
  25. 根据权利要求22所述的装置，其中，所述接收模块，用于根据所述标签生成的随机数的大小，接收所述第二反馈信息。
  26. 根据权利要求22所述的装置，其中，所述发送模块，还用于在所述第二反馈信息包含所述标签的电子产品码信息的情况下，触发接入流程。
  27. 一种反向散射通信装置，应用于标签，其中，包括：
    接收模块，用于接收来自于第一设备的第一信号；
    发送模块，用于根据所述第一信号向第二设备发送第一反馈信息。
  28. 根据权利要求27所述的装置，其中，在所述第一信号包括控制命令和/或随机请求命令的情况下，所述第一反馈信息包含以下至少一项：
    所述标签的标识信息，所述标签的电子产品码信息，句柄信息。
  29. 根据权利要求28所述的装置，其中，所述标签的标识信息包括所述标签生成的随机数。
  30. 根据权利要求29所述的装置，其中，所述发送模块，用于根据所述第一信号以及所述随机数，向第二设备发送第一反馈信息。
  31. 根据权利要求27所述的装置，其中，不同类型的所述标签和/或同一类型下不同的所述标签，在相同的时刻和/或载频下发送所述第一反馈信息。
  32. 根据权利要求27所述的标签，其中，所述发送模块发送所述第一反馈信息的复用模式至少包含以下一项：TDM复用模式，FDM复用模式。
  33. 根据权利要求32所述的装置，其中，
    在TDM复用模式下，不同类型的所述标签和/或同一类型下不同的所述标签，按照第一时间间隔分别发送所述第一反馈信息；
    在FDM复用模式下，不同类型的所述标签和/或同一类型下不同的所述标签，按照第一频域间隔分别发送所述第一反馈信息。
  34. 一种反向散射通信装置，应用于第二设备，其中，包括：
    接收模块，用于接收来自于标签的第一反馈信息，所述第一反馈信息是所述标签基于第一设备发送的第一信号发送的；
    发送模块，用于根据所述第一反馈信息，向第一设备发送第二反馈信息。
  35. 根据权利要求34所述的装置，其中，
    在所述第一反馈信息包含所述标签的相关信息的情况下，所述第二反馈信息至少包含所述第一反馈信息；和/或
    在所述第一反馈信息不包含所述标签的相关信息的情况下，所述第二反馈信息包含如下至少之一：用于请求重传所述第一信号的信息、填充消息，所述填充消息用于指示所述第一反馈信息不包含所述标签的相关信息；
    其中，所述标签的相关信息包括所述标签的标识信息或电子产品码信息。
  36. 一种反向散射通信装置，应用于第二设备，其中，包括：
    接收模块，用于接收来自于第一设备的第一信号；
    所述接收模块，还用于在所述第一信号包含控制命令和/或激励载波的情况下，监听来自于标签的第一反馈信息。
  37. 根据权利要求36所述的装置，其中，所述接收模块，用于在接收所述第一信号特定时间间隔之后，监听来自于标签的第一反馈信息。
  38. 一种通信设备，其中，包括处理器和存储器，所述存储器存储可在所述处理器上运行的程序或指令，所述程序或指令被所述处理器执行时实现如权利要求1至8任一项所述的方法的步骤，或者实现如权利要求16至21任一项所述的方法的步骤。
  39. 一种可读存储介质，其中，所述可读存储介质上存储程序或指令，所述程序或指令被处理器执行时实现如权利要求1至8任一项所述的方法的步骤，或者实现如权利要求16至21任一项所述的方法的步骤。
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