WO2024082967A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2024082967A1
WO2024082967A1 PCT/CN2023/123230 CN2023123230W WO2024082967A1 WO 2024082967 A1 WO2024082967 A1 WO 2024082967A1 CN 2023123230 W CN2023123230 W CN 2023123230W WO 2024082967 A1 WO2024082967 A1 WO 2024082967A1
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WO
WIPO (PCT)
Prior art keywords
information
value
time slot
query
antenna
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PCT/CN2023/123230
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English (en)
Chinese (zh)
Inventor
陈冬明
蒋金弟
李少华
陈雍珏
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华为技术有限公司
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Publication of WO2024082967A1 publication Critical patent/WO2024082967A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K17/00—Methods or arrangements for effecting co-operative working between equipments covered by two or more of main groups G06K1/00 - G06K15/00, e.g. automatic card files incorporating conveying and reading operations
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/77—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for interrogation

Definitions

  • the present application relates to the field of communication technology, and in particular to a communication method and device.
  • Radio frequency identification (RFID) technology is a contactless automatic identification technology.
  • RFID systems usually include readers and tags.
  • the reader can send a selection signal to select one or more tags for inventory.
  • the reader can also send a query signal to the tag to initiate an inventory cycle.
  • the query signaling may include a slot-count parameter (Q) value.
  • An inventory cycle may include 2 Q slots.
  • the reader may determine whether there is a tag in each slot. When the tag receives the query signaling, it may generate a random number belonging to [0, 2 Q -1] as a slot counter based on the Q value. Each time a query repetition (QueryRep) signaling is received, the slot counter is reduced by 1. When the slot counter is equal to 0, the tag may send a random number. If the reader successfully receives the random number sent by the tag, the reader may send a confirmation message to the tag. When the reader finishes the inventory of a tag, it may also send a query repetition signaling to trigger the inventory of the next tag.
  • SQLRep query repetition
  • readers usually support multiple antennas, and different antennas can use time division multiplexing to inventory tags.
  • time division multiplexing to inventory tags.
  • the present application provides a communication method and device, which can reduce the antenna idling delay of a reader during an inventory process, achieve rapid switching of the antenna, reduce the inventory time of the reader for tags, and improve the inventory rate.
  • an embodiment of the present application provides a communication method, which can be applied to a second device, and the method may include: sending a query signaling through a first antenna; if the first information from the first device is not detected in 2 Q time slots, switching to the second antenna to send a query signaling; wherein the query signaling is used to indicate a first time slot counting parameter Q value, the first Q value is 0, and the Q value is used to detect the first device.
  • the second device (such as a reader) sets the first Q value to 0, that is, the second device sets an inventory cycle to 1 time slot. If there is a first device to be inventoried (such as a tag) within the coverage of the first antenna, the second device will receive the first information sent by the first device in the 1 time slot. If there is no first device to be inventoried within the coverage of the first antenna, the second device will not receive the first information sent by the first device in the 1 time slot, so that it can quickly detect whether there is a first device to be inventoried within the coverage of the first antenna.
  • a first device to be inventoried such as a tag
  • the second device can directly switch to the second antenna, thereby reducing the idling delay of the first antenna, reducing invalid inventory time, and reducing the inventory time of the second device for the first device, so as to achieve rapid inventory of the first device and improve inventory efficiency.
  • the collision probability is set to 0; wherein the collision probability is the collision probability between one or more first devices.
  • the query signaling is switched to the second antenna.
  • the second device can also set the collision probability to 0 when the first information is not detected in 2 Q time slots, to indicate that there is no first device to be inventoried within the coverage of the first antenna, and then the second device can switch to the second antenna for inventory, thereby realizing switching between antennas.
  • a query adjustment signaling is sent; wherein, the at least two conflicting first information are at least two first information detected in the same time slot; the query adjustment signaling includes a second Q value, and the second Q value is greater than the first Q value.
  • the second device detects at least two conflicting first information in 2 Q time slots, it can indicate that there are multiple first devices to be inventoried within the coverage of the first antenna.
  • the second device can adjust the Q value to the second Q value, thereby reducing the probability that different first devices determine the same initial value of the time slot counter according to the second Q value, thereby reducing the collision between the first devices, thereby Rapidly inventory a large number of first devices to improve the success rate of the inventory of the first devices.
  • 1 ⁇ i ⁇ 2Q for the i-th time slot, where 1 ⁇ i ⁇ 2Q ; if at least two conflicting first information are detected in the i-th time slot, the collision probability is adjusted once; if at least two conflicting first information are not detected in the i-th time slot, the collision probability is not adjusted.
  • 1 ⁇ i ⁇ 2Q can also be described as i traversing 1 to 2Q .
  • the second device when it detects at least two conflicting first information in 2 Q time slots, it may adjust the collision probability to indicate that there is a first device to be inventoried within the coverage of the first antenna.
  • a confirmation message is sent to the first device associated with the first information; if the second information from the first device associated with the first information is not successfully detected, a query adjustment signaling is sent; wherein the query adjustment signaling includes a second Q value, and the second Q value is greater than the first Q value.
  • the second device may indicate that there are multiple first devices to be inventoried within the coverage of the first antenna.
  • the second device may adjust the Q value to the second Q value, thereby reducing the probability that different first devices have the same initial value of the time slot counter determined according to the second Q value, reducing collisions between first devices, thereby quickly inventorying a large number of first devices and improving the success rate of the inventory of first devices.
  • the collision probability is adjusted once; if the first information without conflict is detected in the i-th time slot, and the second information from the first device associated with the first information is successfully detected, the collision probability is not adjusted.
  • 1 ⁇ i ⁇ 2 Q can also be described as i traversing 1 to 2 Q .
  • the second device may also adjust the collision probability when failing to successfully detect the second information from the first device associated with the first information to indicate that there is a first device to be inventoried within the coverage of the first antenna.
  • the collision probability is not 0, it may indicate that there is a first device to be inventoried within the coverage range of the first antenna, and then the second device can adjust the Q value to the second Q value, thereby reducing the probability that different first devices have the same initial value of the time slot counter determined according to the second Q value, reducing collisions between first devices, thereby quickly inventorying a large number of first devices and improving the inventory success rate of the first devices.
  • the second Q value is determined according to the collision probability.
  • the second device can determine the second Q value according to the collision probability so that the second Q value matches the number of first devices to be inventoried within the coverage of the first antenna as much as possible, thereby improving the success rate of the first device inventory.
  • an embodiment of the present application provides a communication method, which can be applied to a first device, and the method may include: receiving query information from a second device; wherein; the query information includes a first time slot counting parameter Q value, and the first Q value is 0; based on the first Q value, determining the initial value of the time slot counter; when the value of the time slot counter is updated to 0, sending the first information to the second device.
  • the second device (such as a reader) sets the first Q value to 0, that is, the second device sets an inventory cycle to 1 time slot. If there is a first device to be inventoried (such as a tag) within the coverage of the first antenna, the second device will receive the first information sent by the first device in the 1 time slot. If there is no first device to be inventoried within the coverage of the first antenna, the second device will not receive the first information sent by the first device in the 1 time slot, so that it can quickly detect whether there is a first device to be inventoried within the coverage of the first antenna.
  • a first device to be inventoried such as a tag
  • the second device can directly switch to the second antenna, thereby reducing the idling delay of the first antenna, reducing invalid inventory time, and reducing the inventory time of the second device for the first device, so as to achieve rapid inventory of the first device and improve inventory efficiency.
  • a query adjustment signaling is received from a second device, wherein the query adjustment signaling includes a second Q value, and the second Q value is greater than the first Q value; and based on the second Q value, an initial value of the time slot counter is updated.
  • the second device can adjust the Q value to the second Q value, thereby reducing the probability that different first devices have the same initial value of the time slot counter determined according to the second Q value, reducing collisions between first devices, thereby quickly inventorying a large number of first devices and improving the success rate of the inventory of first devices.
  • an embodiment of the present application provides a communication device, which can be applied to the second device in the first aspect or a possible design of the first aspect to implement the function performed by the second device.
  • the communication device can be a second device, or a chip or system on chip of the second device, etc.
  • the communication device can execute the function performed by the second device through hardware, or execute the corresponding software implementation through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver module and a processing module.
  • the transceiver module is used to send query signaling through the first antenna; wherein the query signaling is used to indicate the first time slot count parameter Q value, ... A Q value is 0, and the Q value is used to detect the first device; the transceiver module is also used to switch to the second antenna to send the query signaling if the processing module fails to detect the first information from the first device in 2 Q time slots.
  • the processing module is further used to set the collision probability to 0 if the first information is not detected in 2 Q time slots; wherein the collision probability is the collision probability between one or more first devices.
  • the transceiver module is specifically configured to switch to the second antenna to send the query signaling if the collision probability is 0.
  • the transceiver module is also used to send a query adjustment signaling if the processing module detects at least two conflicting first information in 2 Q time slots; wherein the at least two conflicting first information are at least two first information detected in the same time slot; and the query adjustment signaling includes a second Q value, and the second Q value is greater than the first Q value.
  • the processing module is further configured to adjust the collision probability once if at least two conflicting first information are detected in the i-th time slot; the processing module is further configured to not adjust the collision probability if at least two conflicting first information are not detected in the i-th time slot.
  • 1 ⁇ i ⁇ 2 Q can also be described as i traversing from 1 to 2 Q .
  • the transceiver module is also used to send confirmation information to the first device associated with the first information if there is no conflict between the first information detected by the processing module in 2 Q time slots; the transceiver module is also used to send query adjustment signaling if the processing module fails to successfully detect the second information from the first device associated with the first information; wherein the query adjustment signaling includes a second Q value, and the second Q value is greater than the first Q value.
  • the processing module is further configured to adjust the collision probability once if the first information without conflict is detected in the i-th time slot, but the second information from the first device associated with the first information is not successfully detected; the processing module is further configured to not adjust the collision probability if the first information without conflict is detected in the i-th time slot, and the second information from the first device associated with the first information is successfully detected.
  • 1 ⁇ i ⁇ 2 Q can also be described as i traversing 1 to 2 Q .
  • the transceiver module is also used to send a query adjustment signaling if the collision probability is not 0 when the processing module detects the first information in 2 Q time slots.
  • the processing module is further used to determine a second Q value based on the collision probability.
  • modules involved in the third aspect or the possible design of the third aspect can perform the corresponding functions in the method example of the first aspect mentioned above.
  • the beneficial effects can also refer to the relevant description of the first aspect mentioned above, which will not be repeated here.
  • an embodiment of the present application provides a communication device, which can be applied to the first device in the second aspect or the possible design of the second aspect to implement the function performed by the first device.
  • the communication device can be the first device, or it can be a chip or system on chip of the first device, etc.
  • the communication device can perform the function performed by the first device through hardware, or it can perform the corresponding software implementation through hardware.
  • the hardware or software includes one or more modules corresponding to the above functions. For example, a transceiver module and a processing module.
  • the transceiver module is used to receive query information from the second device; wherein the query information includes a first time slot counting parameter Q value, and the first Q value is 0; the processing module is used to determine the initial value of the time slot counter according to the first Q value; the transceiver module is also used to send the first information to the second device when the value of the time slot counter is updated to 0.
  • the transceiver module is also used to receive query adjustment signaling from a second device; wherein the query adjustment signaling includes a second Q value, and the second Q value is greater than the first Q value; the processing module is also used to update the initial value of the time slot counter according to the second Q value.
  • modules involved in the fourth aspect or the possible design of the fourth aspect can perform the corresponding functions in the method example of the second aspect mentioned above.
  • the beneficial effects can also refer to the relevant description of the second aspect mentioned above, which will not be repeated here.
  • an embodiment of the present application provides a communication device, which includes one or more processors; one or more processors are used to run computer programs or instructions, and when the one or more processors execute the computer instructions or instructions, the communication device executes the communication method described in any one of the first aspect to the second aspect.
  • the communication device further includes one or more memories, the one or more memories are coupled to one or more processors, and the one or more memories are used to store the above-mentioned computer programs or instructions.
  • the memory is located outside the communication device. In another possible implementation, the memory is located inside the communication device.
  • the processor and the memory may also be integrated into one device, that is, the processor and the memory may also be integrated together.
  • the communication device further includes a transceiver, and the transceiver is used to receive information and/or send information.
  • the communication device also includes one or more communication interfaces, the one or more communication interfaces are coupled to the one or more processors, and the one or more communication interfaces are used to communicate with other modules outside the communication device.
  • an embodiment of the present application provides a communication device, which includes an input/output interface and a logic circuit; the input/output interface is used to input and/or output information; the logic circuit is used to execute the communication method described in any one of the first to second aspects, and process and/or generate information based on the information.
  • an embodiment of the present application provides a computer-readable storage medium, which stores computer instructions or programs.
  • the computer instructions or programs are run on a computer, the communication method described in any one of the first to second aspects is executed.
  • an embodiment of the present application provides a computer program product comprising computer instructions, which, when executed on a computer, enables the communication method described in any one of the first to second aspects to be executed.
  • an embodiment of the present application provides a computer program, which, when executed on a computer, enables the communication method described in any one of the first to second aspects to be executed.
  • the technical effects brought about by any design method in the fifth to ninth aspects can refer to the technical effects brought about by any design method in the first to second aspects mentioned above.
  • an embodiment of the present application provides a communication system, which may include the second device as described in the third aspect and the first device as described in the fourth aspect.
  • FIG1 is a schematic diagram of a communication principle of an RFID system provided in an embodiment of the present application.
  • FIG2 is a flow chart of a reader/writer providing an embodiment of the present application for selecting, inventorying, and accessing tags;
  • FIG3 is a schematic diagram of a reader-writer communication principle provided in an embodiment of the present application.
  • FIG4 is a schematic diagram of a multi-door entry and exit scenario provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of a communication system provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of a communication system provided in an embodiment of the present application.
  • FIG7 is a schematic diagram of a communication system provided in an embodiment of the present application.
  • FIG8 is an interaction diagram of a communication system provided in an embodiment of the present application.
  • FIG9 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application.
  • FIG10 is a flow chart of a communication method provided in an embodiment of the present application.
  • FIG11 is a flow chart of a communication method provided in an embodiment of the present application.
  • FIG12 is a flow chart of a communication method provided in an embodiment of the present application.
  • FIG13 is a schematic diagram of a link timing provided in an embodiment of the present application.
  • FIG14 is a schematic diagram of the composition of a communication device provided in an embodiment of the present application.
  • FIG15 is a structural diagram of a communication device provided in an embodiment of the present application.
  • Radio frequency identification (RFID) technology It is a contactless automatic recognition technology, or described as a technology that performs contactless two-way data communication via radio frequency. It is mainly used for identity recognition, and can also be used to read and write user data. RFID systems usually include readers and tags.
  • RFID technology was derived due to the development and progress of radar technology.
  • Harry Stockman's "communication using reflected power” laid the theoretical foundation for RFID technology.
  • RFID technology belongs to the field of automatic identification and data capture (AIDC) in information technology, and is formulated by the International Organization for Standardization (ISO) and the International Electrotechnical Commission (IEC). RFID standardization work can be traced back to the 1980s.
  • ISO International Organization for Standardization
  • IEC International Electrotechnical Commission
  • Reader/Writer A device with reading and writing functions, for example, a handheld or fixed device that reads or writes tag information. Alternatively, it can also be understood as a device that communicates with a tag.
  • Tag It can also be called an electronic tag or an RFID tag. From the tag properties, it can be divided into passive tags, semi-active tags, and active tags according to whether it needs to have its own battery.
  • passive tags there is no battery inside, and the energy for their operation can be provided by the reader. That is, the reader can emit energy to stimulate the tag, and the tag reflects the excitation energy and carries information at the same time, which is then received and demodulated by the reader.
  • part of the energy of the continuous wave (CW) sent by the reader can be used for internal processing such as encoding and decoding, modulation and demodulation of the tag.
  • the continuous wave can also be used as a carrier to carry the uplink information of the tag.
  • Passive tags can also be called passive Internet of Things devices (passive IOT). Based on this working mode, the cost of passive tags can be made lower and the working life is longer.
  • a battery may be included inside, and internal processing such as encoding, decoding, modulation and demodulation may be powered by the battery, but the continuous wave of the reader is still required as a carrier.
  • Active tags may include batteries inside. Active tags can use their own batteries to actively transmit information. They are relatively expensive and their working life is limited by the battery capacity and frequency of use.
  • the device with both transmitting and receiving capabilities is an integrated design, which can generate a signal waveform in the reader, transmit the signal through the antenna, and propagate the signal through the air interface to reach the tag.
  • the tag collects energy based on the received signal. If the power is greater than the excitation threshold, the tag will be excited, sense the signal and backscatter the signal to the reader, which receives the signal to complete the communication between the reader and the tag.
  • the reading and writing distance of low frequency (LF) RFID is less than 0.1 meters
  • the reading distance of high frequency (HF) RFID is 0.1 to 0.2 meters
  • the reading distance of ultra high frequency (UHF) RFID is less than 15 meters (such as passive tags).
  • the reader can perform operations such as selection, inventory, and access on tags.
  • the selection operation is used to select one or a group of tags for inventory and access.
  • the inventory operation can be understood as the process of the reader identifying the tag.
  • the access operation can be understood as the process of the reader interacting with the tag.
  • the tag needs to be identified by the reader before access.
  • FIG2 the process of selecting, inventorying, and accessing tags by a reader/writer may be shown in FIG2.
  • the process includes the following steps:
  • Step 201 The reader sends a select signaling.
  • the reader can select one or more tags based on one or more values in the tag memory, and tags that meet the selection conditions are selected to enter the inventory state.
  • Step 201 is an optional step. For example, when the tags to be inventoried are all the tags stored in the current tag memory, step 201 may not be performed.
  • Step 202 The reader sends a query signal.
  • the query signaling sent by the reader can be used to initiate an inventory cycle.
  • query signaling can notify the tag of the inventory rate, encoding method and slot count parameter (slot-count parameter, Q) value.
  • the Q value refers to a parameter used by the reader to adjust the probability of a tag responding.
  • An inventory cycle can include 2 Q time slots, and the reader can determine whether there is a tag in each time slot.
  • the inventory access can be performed in a time-division multiplexing manner, that is, after the reader finishes the inventory access to one tag, it starts the inventory access to the next tag.
  • the following steps are described using the inventory access to one tag as an example.
  • Step 203 The tag sends a random number (RN) to the reader.
  • RN random number
  • the random number may be a 16-bit random number (RN16).
  • the tag when it receives the query signaling, it can generate a random number belonging to [0, 2 Q -1] as a time slot counter according to the Q value.
  • the tag can send a 16-bit random number to the reader as a handshake message. If the value of the time slot counter is not 0, the tag does not need to send any response message to the reader.
  • the tag can also reduce the slot counter by 1 each time it receives a query repeat (QueryRep) signaling.
  • queryRep query repeat
  • the tag sends RN16 to the reader.
  • the tag may also adjust the initial value of the time slot counter according to the Q value in the query adjustment signaling when receiving the query adjustment signaling including the Q value.
  • Step 204 The reader sends an acknowledgment (ACK) message to the tag.
  • ACK acknowledgment
  • the reader can send confirmation information to the tag, and the confirmation information can include the random number sent by the tag to the reader.
  • step 205 After the tag receives the confirmation information carrying the random number sent by itself within the specified time, the following step 205 can be executed.
  • Step 205 The tag sends the electronic product code (EPC) information to the reader.
  • EPC electronic product code
  • the tag When the tag receives the confirmation information sent by the reader, it means that the reader and the tag have successfully handshaked.
  • the tag can report the EPC information to the reader and the tag enters the confirmation state.
  • Step 206 The reader sends a random number request command to the tag.
  • the random number request command may be used to request the tag to re-report a new random number.
  • the reader When the reader receives the EPC information sent by the tag, it may send a random number request command to the tag, and the random number request command may include RN16 reported by the tag.
  • Step 207 The tag sends a 16-bit random number handle to the reader.
  • the tag After the tag receives the request random number command, if the RN16 included in the request random number command is the same as the RN16 of the tag itself, the tag can generate and store a new 16-bit random number handle, and send it to the reader, entering the open state or the safe state or the accessed state. If the RN16 included in the request random number command is different from the RN16 of the tag itself, the tag does not need to respond to the request random number command.
  • Step 208 The reader sends an access command to the tag.
  • the reader When the reader receives the 16-bit random number handle sent by the tag, it can carry it in the access command and send it to the tag.
  • Step 209 The tag responds to the access command.
  • the tag When receiving an access command, the tag may verify the 16-bit random number handle in the access command. If they match, the tag may respond to the access command. If they do not match, the tag may not respond to the access command.
  • the reader When the reader finishes taking inventory of a tag, it can also send a query repeat signaling to trigger the inventory of the next tag.
  • the reader can usually support multiple antennas (such as 4 to 8 antennas). Since the reader chip has only a single channel for transceiver link, different antennas (or antenna ports) use time division multiplexing (or time division scheduling), which results in a longer inventory time for the reader.
  • multiple antennas such as 4 to 8 antennas. Since the reader chip has only a single channel for transceiver link, different antennas (or antenna ports) use time division multiplexing (or time division scheduling), which results in a longer inventory time for the reader.
  • each antenna of the reader/writer takes inventory of tags, if there are no tags to be inventoried within the coverage of the current antenna, the antenna will idle.
  • an embodiment of the present application provides a communication method, in which the second device sends a query signaling through a first antenna. If the first information from the first device is not detected in 2 Q time slots, the second device switches to the second antenna to send a query signaling; wherein the query signaling is used to indicate the first time slot counting parameter Q value, the first Q value is a smaller value such as 0 or 1 or 2, and the Q value is used to detect the first device.
  • the second device since one inventory cycle is 2 Q time slots, the second device (such as a reader) sets the first Q value to a smaller value such as 0, 1 or 2, that is, the second device can set one inventory cycle to 1 time slot or fewer time slots. If there is a first device (such as a tag) to be inventoried within the coverage of the first antenna, the second device will receive the first information sent by the first device in the 1 or fewer time slots. If there is no first device to be inventoried within the coverage of the first antenna, the second device will not receive the first information sent by the first device in the 1 or fewer time slots, so that it can quickly detect whether there is a first device to be inventoried within the coverage of the first antenna.
  • a first device such as a tag
  • the second device can directly switch to the second antenna, thereby reducing the idling delay of the first antenna, reducing invalid inventory time, and reducing the inventory time of the second device for the first device, so as to achieve a fast inventory of the first device and improve the inventory efficiency.
  • the communication method provided in the embodiment of the present application can be used in any communication system, and the communication system can be a third generation partnership project (Third Generation Partnership Project).
  • the present invention relates to a fifth generation partnership project (3GPP) communication system, such as an RFID system, a long term evolution (LTE) system, a fifth generation (5G) mobile communication system, a new radio (NR) communication system, and a vehicle to everything (V2X) system.
  • 3GPP fifth generation partnership project
  • LTE long term evolution
  • 5G fifth generation
  • NR new radio
  • V2X vehicle to everything
  • LTE and 5G are hybrid networks, or a non-terrestrial network (NTN) system, a device-to-device (D2D) communication system, a machine-to-machine (M2M) communication system, an Internet of Things (IoT), a near field communication (NFC) system, a microwave communication (uWave) system, and other next generation communication systems, such as 6G and future 3GPP-defined passive Internet of Things and other future communication systems, and can also be a non-3GPP communication system, such as a wireless local area network (WLAN), etc., without limitation.
  • NTN non-terrestrial network
  • D2D device-to-device
  • M2M machine-to-machine
  • IoT Internet of Things
  • NFC near field communication
  • uWave microwave communication
  • non-3GPP communication system such as a wireless local area network (WLAN), etc., without limitation.
  • the communication method provided in the embodiments of the present application can be applied to RFID scenarios, X-IoT (X can be passive, semi-passive Internet of Things, etc.), warehousing, logistics, manufacturing, retail, asset management, checkpoints or production lines, etc., without limitation.
  • X-IoT X can be passive, semi-passive Internet of Things, etc.
  • warehousing logistics, manufacturing, retail, asset management, checkpoints or production lines, etc., without limitation.
  • FIG5 is a schematic diagram of a communication system provided in an embodiment of the present application. As shown in FIG5 , the communication system may include one or more first devices and one or more second devices.
  • the first device may be a device that communicates with a device having a read/write function (i.e., a second device).
  • the energy and/or carrier required for the first device to work may be provided by the second device.
  • the first device may communicate with the second device via the carrier provided by the second device.
  • the first device may be a tag, or a terminal device capable of implementing a tag function, or the first device may be a module or chip capable of implementing a tag function, etc., without limitation.
  • the second device may be a device with read/write functions, and may be a handheld or fixed device that reads or writes information of the first device.
  • the second device may include multiple antennas, and the second device may transmit, excite, and demodulate RFID tag signals (or described as excitation signals, RFID signals) through each antenna to implement inventory of the first device.
  • the second device may also dynamically adjust the Q value to improve the inventory success rate of the first device while ensuring that the idle delay of the antenna of the second device is small.
  • the second device may be a reader/writer, or a terminal device capable of reading and writing, or a network device capable of reading and writing.
  • the second device may be a module or chip capable of reading and writing, etc., without limitation.
  • the first device may be located within the coverage provided by the second device.
  • the communication between the first device and the second device may be regarded as communication between terminal devices.
  • the communication between the first device and the second device may be regarded as air interface communication, that is, the first device and the second device communicate through the Uu interface.
  • the reader/writer can be an integrated architecture as shown in (a) of Figure 6, or a wireless transceiver separation architecture as shown in (b) of Figure 6, or a wired transceiver separation architecture as shown in (c) of Figure 6, without limitation.
  • the reader/writer may include a helper and a receiver.
  • the helper can communicate downlink with the first device (such as a tag), and can communicate uplink and downlink with the receiver through an air interface or a wired connection.
  • the receiver can manage the helper, and can also receive the signal reflected by the first device, or be described as receiving the uplink signal sent by the first device.
  • the helper can send an excitation signal to the first device within its coverage range according to the signaling sent by the receiver.
  • the helper may also be called an excitation source, an exciter, an excitation node, etc., without limitation.
  • the assistant may be a terminal device, or a base station or a small station. There is only downlink between the assistant and the first device, and uplink and downlink data transmission between the assistant and the receiver, which may be through an air interface or a wired connection.
  • the receiver can perform downlink communication with the assistant, such as the receiver can send downlink control signaling to the assistant; the assistant can send an excitation signal to the tag according to the downlink control signaling, and the tag can send an uplink signal to the receiver according to the excitation signal, thereby realizing communication with the receiver.
  • the assistant can send an excitation signal to the tag according to the downlink control signaling
  • the tag can send an uplink signal to the receiver according to the excitation signal, thereby realizing communication with the receiver.
  • the terminal equipment can be a device with wireless transceiver function or a chip or chip system that can be set in the device.
  • the terminal equipment can also be called user equipment (UE) or terminal (terminal) or mobile station (MS) or mobile terminal (MT), etc.
  • UE user equipment
  • terminal terminal
  • MS mobile station
  • MT mobile terminal
  • the terminal equipment can be a handheld device with wireless connection function, a vehicle-mounted device, etc., such as a mobile phone, a tablet computer, a notebook, a PDA or a computer with wireless transceiver function.
  • the terminal equipment can also be a mobile Internet device (MID), a wearable device, a virtual reality (VR) terminal, an augmented reality (AR) terminal, a wireless terminal in industrial control (industrial control), a wireless Wireless terminals used in self-driving, remote medical surgery, smart grids, transportation safety, smart cities, smart homes, vehicle-mounted terminals, vehicles with vehicle-to-vehicle (V2V) communication capabilities, smart connected vehicles, drones with UAV to UAV (U2U) communication capabilities, etc. are not restricted.
  • MID mobile Internet device
  • VR virtual reality
  • AR augmented reality
  • WLAN wireless Wireless terminals used in self-driving, remote medical surgery, smart grids, transportation safety, smart cities, smart homes, vehicle-mounted terminals, vehicles with vehicle-to-vehicle (V2V) communication capabilities, smart connected vehicles, drones with UAV to UAV (U2U) communication capabilities, etc.
  • the network equipment can be any equipment deployed in the access network that can communicate wirelessly with the terminal equipment, and is mainly used to implement wireless physical control functions, resource scheduling and wireless resource management, wireless access control, and mobility management.
  • the network equipment can be a device that supports wired access or a device that supports wireless access.
  • the network equipment can be an access network (AN)/radio access network (RAN) device, which is composed of multiple AN/RAN nodes.
  • the AN/RAN node may be: a base station (nodeB, NB), a macro base station, a micro base station, a relay station, an enhanced base station (enhance nodeB, eNB), a next-generation base station (NR nodeB, gNB), a radio network controller (radio network controller, RNC), a base station controller (base station controller, BSC), a base transceiver station (base transceiver station, BTS), a home base station (for example, a home evolved nodeB, a home base station (home nodeB, HNB)), a base band unit (base band unit, BBU), an access point (access point, AP), or a wireless fidelity AP (wireless fidelity AP, Wi-Fi AP), a transmission reception point (transmission reception point, TRP), a transmission point (transmission point, TP), a wireless relay node or a wireless backhaul node in an integrated access and backhaul (IAB) (i.e.
  • the network device may also be a centralized unit (CU)/distributed unit (DU) architecture.
  • the network device may include a CU, or a DU, or a CU and a DU.
  • the network device including the CU and the DU may separate the protocol layer of the eNB in the LTE, 5G, and even future 6G communication systems, with the functions of some protocol layers being centrally controlled by the CU, and the functions of the remaining part or all of the protocol layers being distributed in the DU, which is centrally controlled by the CU.
  • the DU may be split at the physical layer into a DU and a radio unit (RU).
  • the interface between the DU and the RU may be a common public radio interface (CPRI) interface, an enhanced common public radio interface (eCPRI) interface, or a fronthaul interface in an open radio access network (O-RAN or ORAN).
  • CPRI common public radio interface
  • eCPRI enhanced common public radio interface
  • O-RAN open radio access network
  • the base station may be a micro BS, which may communicate with the tag through a Uu interface.
  • the terminal device may communicate with the tag through a sidelink (SL).
  • the base station may be an IAB node, which may communicate with a macro BS through a Uu interface, and communicate with the tag through a Uu interface.
  • the communication between the first device and the second device can also support a separate architecture.
  • the terminal device and the base station can perform uplink communication or downlink communication.
  • the base station 1 can provide a carrier signal for the tag, and the base station 1 and the tag can perform uplink communication, and the tag and the terminal device can perform downlink communication.
  • the terminal device can provide a carrier signal for the tag, and the base station 1 and the tag can perform downlink communication, and the tag and the terminal device can perform uplink communication.
  • the terminal device can provide a carrier signal for the tag, and the base station 1 and the tag can perform uplink communication, and the tag and the terminal device can perform downlink communication.
  • the base station 1 can provide a carrier signal for the tag, and the base station 1 and the tag can perform downlink communication, and the tag and the terminal device can perform uplink communication.
  • a base station that can communicate with both a tag and a terminal device can be referred to as a co-station of the tag and the terminal device (such as base station 1).
  • a base station that can only communicate with a tag or a base station that can only communicate with a terminal device can be referred to as a different station of the tag and the terminal device (such as base station 2).
  • the first device and the second device of the embodiment of the present application can be one or more chips, or a system on chip (SOC), etc.
  • FIG. 5 is only an exemplary figure, and the number of devices included therein is not limited.
  • the communication system may also include other devices.
  • the names of the various devices and the names of the various links in FIG. 5 are not limited.
  • the various devices and the various links may also be named with other names without limitation.
  • each first device and second device can adopt the composition structure shown in Figure 9, or include the components shown in Figure 9.
  • Figure 9 is a schematic diagram of the composition of a communication device 900 provided in an embodiment of the present application.
  • the communication device 900 may be a first device or a chip or system on chip in the first device; or a second device or a chip or system on chip in the second device.
  • the communication device 900 includes a processor 901 , a transceiver 902 and a communication line 903 .
  • the communication device 900 may also include a memory 904.
  • the processor 901, the memory 904 and the transceiver 902 may be connected via a communication line 903.
  • the processor 901 is a central processing unit (CPU), a general-purpose processor, a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof.
  • the processor 901 may also be other devices with processing functions, such as circuits, devices, or software modules, without limitation.
  • the transceiver 902 is used to communicate with other devices or other communication networks.
  • the other communication networks may be Ethernet, radio access network (RAN), wireless local area networks (WLAN), etc.
  • the transceiver 902 may be a module, a circuit, a transceiver or any device capable of achieving communication.
  • the communication line 903 is used to transmit information between the components included in the communication device 900.
  • the memory 904 is used to store instructions, where the instructions may be computer programs.
  • the memory 904 can be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, or a random access memory (RAM) or other types of dynamic storage devices that can store information and/or instructions, or an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.), magnetic disk storage media or other magnetic storage devices, etc., without limitation.
  • ROM read-only memory
  • RAM random access memory
  • EEPROM electrically erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • CD-ROM compact disc read-only memory
  • optical disc storage including compressed optical disc, laser disc, optical disc, digital versatile disc, Blu-ray disc, etc.
  • magnetic disk storage media or other magnetic storage devices etc.
  • the memory 904 can exist independently of the processor 901, or can be integrated with the processor 901.
  • the memory 904 can be used to store instructions or program codes or some data, etc.
  • the memory 904 can be located in the communication device 900, or can be located outside the communication device 900, without limitation.
  • the processor 901 is used to execute the instructions stored in the memory 904 to implement the communication method provided in the following embodiments of the present application.
  • the processor 901 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 9 .
  • the communication device 900 includes multiple processors.
  • the processor 901 in FIG. 9 it may also include a processor 907 .
  • the communication device 900 further includes an output device 905 and an input device 906.
  • the input device 906 is a device such as a keyboard, a mouse, a microphone or a joystick
  • the output device 905 is a device such as a display screen and a speaker.
  • the communication device 900 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system, or a device having a similar structure as shown in FIG9.
  • the composition structure shown in FIG9 does not constitute a limitation on the communication device.
  • the communication device may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.
  • the chip system may be composed of a chip, or may include a chip and other discrete devices.
  • the communication method provided in the embodiment of the present application is described with reference to Figure 10 below, wherein the first device may be any first device in the communication system shown in Figures 5 to 8, and the second device may be any second device in the communication system shown in Figures 5 to 8.
  • the first device and the second device described in the following embodiments may both have the components shown in Figure 9.
  • the processing performed by a single execution subject (first device or second device) shown in the embodiment of the present application may also be divided into executions by multiple execution subjects, and these execution subjects may be logically and/or physically separated without restriction.
  • FIG10 is a communication method provided in an embodiment of the present application. As shown in FIG10 , the method may include:
  • Step 1001 The second device sends a query signaling via the first antenna.
  • the query signaling may be used to indicate a first Q value, the first Q value may be 0, and the Q value may be used to detect (or be described as querying) the first device.
  • the first Q value may be 1 or 2 or other smaller values.
  • the first Q value is described as 0 as an example.
  • the description of the first Q value being 1 or 2 or other smaller values may refer to the relevant description of the first Q value being 0, and no further details are given.
  • the Q value can be used by the first device that receives the Q value to generate a random number belonging to [0, 2 Q -1] as the initial value of the time slot counter according to the Q value.
  • the first device can send the first information to the second device.
  • the second device uses a round-robin algorithm to determine the first antenna from multiple antennas of the second device, or the second device uses other algorithms (such as a timed round-robin algorithm, a weighted scheduling algorithm, etc.) to determine the first antenna from multiple antennas of the second device, or the second device randomly selects one antenna from multiple antennas of the second device as the first antenna, without restriction.
  • a round-robin algorithm to determine the first antenna from multiple antennas of the second device
  • other algorithms such as a timed round-robin algorithm, a weighted scheduling algorithm, etc.
  • the second device before the second device sends the query signaling through the first antenna, it sends the selection signaling through the first antenna to select one or more first devices, and the first devices meeting the selection conditions are selected to enter the inventory waiting state.
  • the second device may receive first indication information, select a first antenna from multiple antennas based on the first indication information, and send the selection signaling through the first antenna.
  • the first indication information may be used to instruct the second device to initiate an inventory of the first device.
  • the network device sends the first indication information to the second device.
  • Step 1002 If the second device does not detect the first information from the first device in 2 Q time slots, the second device switches to the second antenna to send a query signaling.
  • the first information may indicate a 16-bit random number, or the first information may be described as RN16 or RN16 information, etc., without limitation.
  • the second device After the second device sends the query signaling through the first antenna, it can detect in each of the 2 Q time slots whether the first information sent by the first device is received.
  • the second device sends a query repetition signaling to trigger the second device to detect the first information in each time slot of 2 Q time slots.
  • the query repetition signaling may also trigger the first device to reduce the value of the time slot counter by 1.
  • the second device can send a query repetition signaling to trigger the second device to detect whether the first information exists in the second time slot among 2 Q time slots, and then send a query repetition signaling to trigger the second device to detect whether the first information sent by the first device exists in the third time slot among 2 Q time slots, ... and then send a query repetition signaling to trigger the second device to detect whether the first information exists in the second Q time slot among the 2 Q time slots.
  • the second device detects whether the first information exists in each time slot of 2 Q time slots based on a round-robin algorithm.
  • the second device may detect whether the first information exists in the i-th time slot of 2 Q time slots, and determine whether the i-th time slot is the last time slot of the 2 Q time slots. If yes, the detection of the 2 Q time slots is completed. If not, the query repetition signaling is sent to detect whether the first information exists in the next time slot.
  • 1 ⁇ i ⁇ 2 Q or described as i traversing 1 to 2 Q .
  • the second device can directly switch to the second antenna for inventory.
  • the description of the process of the second device taking inventory of the first device through the second antenna can refer to the description of the process of the second device taking inventory of the first device through the first antenna, and will not be repeated.
  • the second device sets the collision probability to 0.
  • the second device switches to the second antenna to send the query signaling.
  • the collision probability may be a collision probability between one or more first devices.
  • the second device sets the first Q value to a smaller value such as 0, 1, or 2, that is, the second device sets one inventory cycle to 1 time slot or less time slots. If there is a first device to be inventoried within the coverage of the first antenna, the second device will receive the first information sent by the first device in the 1 or less time slots, such as If there is no first device to be inventoried within the coverage of the first antenna, the second device will not receive the first information sent by the first device in the one or fewer time slots, so that it can quickly detect whether there is a first device to be inventoried within the coverage of the first antenna.
  • the second device can directly switch to the second antenna, thereby reducing the idling delay of the first antenna, reducing the invalid inventory time, reducing the inventory time of the second device for the first device, realizing a fast inventory of the first device, and improving the inventory efficiency.
  • the Q value in the query signaling when each antenna of the second device starts the inventory, if the Q value in the query signaling is set to a large value, the probability that different first devices have the same initial value of the time slot counter determined according to the Q value will be reduced, that is, the collision between the first devices will be reduced, and the second device can quickly inventory a large number of first devices, thereby improving the success rate of the inventory of the first devices.
  • the idling delay of the antenna can be large. If the Q value in the query signaling is set to a small value, the idling delay of the antenna can be reduced, thereby achieving rapid switching of the antenna.
  • the probability that different first devices have the same initial value of the time slot counter determined according to the Q value will be increased, that is, the collision between the first devices will increase, thereby reducing the success rate of the inventory of the first device.
  • the initial Q value can be set to a larger value (for example, the Q value is 4, and can also be adjusted according to the number of first devices).
  • the Q value is adaptively adjusted during the inventory process, and finally the Q value converges to 0, completing the inventory of the current antenna, and then switching to other antennas for inventory, so as to achieve a relative balance between the inventory success rate and the inventory time.
  • the second device needs to go through [2 Q , 2 Q+ 2 Q-1 +...+2 0 ] inventory time slots to switch to the next antenna.
  • the idling time of a single antenna takes tens to hundreds of millimeter, and the idling delay of multiple antennas may reach hundreds of milliseconds.
  • the inconsistency of the remaining idle antennas of the second device due to the first device entering the antenna coverage range may easily lead to unstable inventory results.
  • the initial Q value may be set to a smaller value (for example, the Q value may be set to 0, or the Q value may be set to 1 or 2, etc., without limitation) to achieve rapid switching of antennas when the first device is not within the coverage of the antenna of the second device.
  • the Q value may be increased to achieve an inventory of the first device.
  • the idling delay of the single antenna can be reduced to one to five milliseconds, and when the initial Q value is set to 1 or 2, the idling delay of the single antenna can be reduced to five to twelve milliseconds.
  • the second device may increase the Q value by referring to the method shown in FIG. 12 below to implement an inventory of the first device.
  • FIG12 is a flow chart of a communication method provided in an embodiment of the present application.
  • the second device may adjust the Q value by the method shown in the following step 1203, or may adjust the Q value by the method shown in the following steps 1204 to 1206:
  • Step 1201 The second device communicates with the first antenna to send a query signaling; correspondingly, the first device receives the query signaling sent by the second device.
  • the query information may include a first Q value, and the first Q value may be 0.
  • Step 1202 The first device sends first information to the second device.
  • the first device may generate a random number belonging to [0, 2 Q -1] as the initial value of the time slot counter according to the first Q value, and when the value of the time slot counter is updated to 0, send the first information to the second device.
  • the second device after the second device sends the query signaling through the first antenna, it can also send a query repetition signaling through the first antenna to trigger the first device to reduce the value of the time slot counter by 1.
  • the first device sends the first information to the second device.
  • the description of the first information can refer to the description of the first information in the above-mentioned Figure 10, and will not be repeated here.
  • Step 1203 If the second device detects at least two conflicting first information in 2 Q time slots, the second device sends a query adjustment signaling.
  • the at least two conflicting first information may be at least two first information detected in the same time slot; the query adjustment signaling may include a second Q value, and the second Q value may be greater than the first Q value.
  • the second device detects at least two conflicting first information in 2 Q time slots, it may indicate that there are multiple first devices to be inventoried within the coverage of the first antenna.
  • the second device can adjust the Q value to the second Q value, thereby reducing the probability that different first devices have the same initial value of the time slot counter determined according to the second Q value, reducing collisions between first devices, thereby quickly inventorying a large number of first devices and improving the inventory success rate of the first devices.
  • the second device after the second device sends the query signaling through the first antenna, it can detect whether there are at least two conflicting first information in each time slot of 2 Q time slots.
  • the second device sends a query repetition signaling to trigger the second device to detect the first information in each time slot of 2 Q time slots.
  • the second device may send a query repetition signaling to trigger the second device to detect whether there are at least two conflicting first information in the second time slot among the 2 Q time slots, and then send a query repetition signaling to trigger the second device to detect whether there are at least two conflicting first information in the third time slot among the 2 Q time slots, ... and then send a query repetition signaling to trigger the second device to detect whether there are at least two conflicting first information in the second Q time slot among the 2 Q time slots.
  • the second device detects whether there are at least two conflicting first information in each time slot of 2 Q time slots based on a round-robin algorithm.
  • the second device may detect whether there are at least two conflicting first information in the i-th time slot of 2 Q time slots, and determine whether the i-th time slot is the last time slot of the 2 Q time slots, if yes, complete the detection of the 2 Q time slots, if no, send query repetition signaling to detect whether there are at least two conflicting first information in the next time slot.
  • 1 ⁇ i ⁇ 2 Q the number of conflicting first information in the next time slot.
  • the second device may adjust the collision probability once; for each time slot in which at least two conflicting first information can be detected, the second device may not adjust the collision probability.
  • the second device determines whether to adjust the collision probability in each of the 2 Q time slots based on a round-robin algorithm.
  • the second device may detect whether there are at least two conflicting first information in the i-th time slot of 2 Q time slots, and if so, adjust the collision probability once, and if not, do not adjust the collision probability.
  • the second device may also determine whether the i-th time slot is the last time slot of the 2 Q time slots, and if so, complete the detection of the 2 Q time slots, and if not, send a query repetition signaling to detect whether there are at least two conflicting first information in the next time slot.
  • 1 ⁇ i ⁇ 2 Q It can also be described as i traversing 1 to 2 Q .
  • the second device determines the collision probability according to the amount of conflicting first information.
  • the collision probability when the number of first devices within the coverage of the first antenna is constant, the more conflicting first information detected by the second device, the greater the collision probability, and the fewer conflicting first information detected by the second device, the smaller the collision probability.
  • the second device when the second device detects the first information in 2 Q time slots, if the collision probability is not 0, it indicates that there is a first device to be inventoried within the coverage of the first antenna, and the second device can send a query adjustment signaling through the first antenna to inventory the first device to be inventoried.
  • the second device determines a second Q value according to the collision probability.
  • Step 1204 If there is no conflict between the first information detected by the second device in the 2 Q time slots, the second device sends confirmation information to the first device associated with the first information.
  • the confirmation information sent by the second device to the first device associated with the first information may include the RN16.
  • Step 1205 The first device that receives the confirmation information sends second information to the second device.
  • the second information may include EPC information.
  • Step 1206 If the second device fails to successfully detect the second information from the first device associated with the first information, the second device sends Query adjustment signaling.
  • the query adjustment signaling may include a second Q value, and the second Q value is greater than the first Q value.
  • the second device failing to successfully detect the second information from the first device associated with the first information may include: the second device failing to detect the second information from the first device associated with the first information, or the second device detecting the second information from the first device associated with the first information but failing to demodulate the second information.
  • the second device fails to successfully detect the second information from the first device associated with the first information, it may indicate that there is a first device to be inventoried within the coverage of the first antenna.
  • the second device can adjust the Q value to the second Q value, thereby reducing the probability that different first devices have the same initial value of the time slot counter determined according to the second Q value, reducing collisions between first devices, thereby quickly inventorying a large number of first devices and improving the inventory success rate of the first devices.
  • the second device may adjust the collision probability once. If the second device successfully detects the second information sent by the first device associated with the first information, the collision probability does not need to be adjusted.
  • the second device determines whether to adjust the collision probability in each time slot in which the first information without conflict can be detected based on a round-robin algorithm.
  • the second device can adjust the collision probability once. If the second device successfully detects the second information sent by the first device associated with the first information, the collision probability does not need to be adjusted.
  • the second device can also determine whether the i-th time slot is the last time slot of 2 Q time slots. If so, the detection of 2 Q time slots is completed. If not, a query repetition signaling is sent to detect the first information in the next time slot. Wherein, 1 ⁇ i ⁇ 2 Q.
  • the second device may determine the collision probability according to the amount of undetected second information.
  • the collision probability when the number of first information detected by the second device within the coverage range of the first antenna is certain, the more second information the second device fails to detect successfully, the greater the collision probability, and the fewer second information the second device fails to detect successfully, the smaller the collision probability.
  • the second device when the second device detects the first information and the second information in 2 Q time slots, if the collision probability is not 0, it indicates that there is a first device to be inventoried within the coverage of the first antenna, and the second device can send a query adjustment signaling through the first antenna to inventory the first device to be inventoried.
  • the second device determines a second Q value according to the collision probability.
  • Step 1207 The first device sends the first information to the second device according to the second Q value in the query adjustment signaling.
  • the first device may update the initial value of the time slot counter according to the second Q value, and send the first information to the second device when the value of the time slot counter is updated to 0.
  • the second device can send a random number request command to the first device, and the first device sends a 16-bit random number handle to the second device, and then the second device can access the first device by sending an access command to the first device.
  • the second device can set the collision probability to 0, and then switch to the second antenna to implement inventory of the first device.
  • the second device and a single first device may communicate with each other with reference to the link timing shown in (a) of FIG. 13.
  • the second device and multiple first devices may communicate with each other with reference to the link timing shown in (b) of FIG. 13.
  • T1 may represent the time from the second device transmitting a signal to the first device responding
  • T2 may represent the time from the first device responding to the second device transmitting a signal
  • T3 may represent the waiting time of the second device after T1 until it transmits the next signal
  • T4 may represent the minimum time interval between signals transmitted by the second device.
  • the second device When the second device sends a query signaling carrying the first Q value through the first antenna, if the second device does not detect the first information within T1, the second device may consider that there is no first device to be inventoried within the coverage of the first antenna, and the second device may directly switch to the second antenna for inventory. If the second device detects the first information within T1, the second device may normally inventory the first device with reference to the method shown in FIG. 12 above.
  • each time the second device switches the antenna it can preferentially send the query with a Q value of 0.
  • the query command is used to quickly detect whether there is a first device to be inventoried within the coverage of the antenna of the second device. If there is no first device to be inventoried, the second device can directly switch to the next antenna for inventory. If there is a first device to be inventoried, the second device can normally inventory the first device. If a collision occurs with the first device, the second device can also increase the Q value to reduce the collision between the first devices and implement the inventory of the first device.
  • the first possible implementation method when the second device takes inventory of the first device, the first possible implementation method may be adopted to set the initial Q value to a larger value, and the Q value may be adaptively adjusted during the inventory process, and the Q value may eventually converge to 0, thereby reducing the probability of collision between first devices, quickly taking inventory of a large number of first devices, and improving the success rate of the inventory of first devices.
  • the second possible implementation method may also be adopted to set the initial Q value to a smaller value, and quickly detect whether there is a first device to be inventoried within the coverage of the first antenna. If there is no first device to be inventoried, directly switch to the second antenna, reduce the idling delay of the first antenna, and improve the inventory efficiency. If there is a first device to be inventoried, the Q value may be increased to reduce the probability of collision between first devices, implement the inventory of the first device, and improve the success rate of the inventory.
  • the second device further includes a first switch, and when the first switch is in an on state, the second device uses the first possible implementation method to inventory the first device, and when the first switch is in an off state, the second device uses the second possible implementation method to inventory the first device.
  • the second device uses the second possible implementation method to inventory the first device, and when the first switch is in an off state, the second device uses the first possible implementation method to inventory the first device, without limitation.
  • the execution subject may execute some or all of the steps in the embodiments of the present application, and these steps or operations are only examples, and the embodiments of the present application may also execute other operations or variations of various operations.
  • the various steps may be executed in different orders presented in the embodiments of the present application, and it is possible that not all operations in the embodiments of the present application need to be executed.
  • each device includes a hardware structure and/or software module corresponding to each function.
  • the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.
  • the embodiment of the present application can divide the functional modules of each device according to the above method example.
  • each functional module can be divided according to each function, or two or more functions can be integrated into one processing module.
  • the above integrated module can be implemented in the form of hardware or in the form of software functional modules. It should be noted that the division of modules in the embodiment of the present application is schematic and is only a logical function division. There may be other division methods in actual implementation.
  • Figure 14 shows a communication device 140, which can execute the actions performed by the first device in Figures 10 to 13 above, or execute the actions performed by the second device in Figures 10 to 13 above, without limitation.
  • the communication device 140 may include a transceiver module 1401 and a processing module 1402.
  • the communication device 140 may be a software module, a hardware circuit, or a software module plus a hardware circuit, or may be a chip applied to a communication device or other combined devices, components, etc. having the functions of the above-mentioned communication device.
  • the transceiver module 1401 may be a transceiver, and the transceiver may include an interface circuit, a pin, or an antenna and a radio frequency circuit, etc.
  • the processing module 1402 may be a processor (or a processing circuit), such as a baseband processor, and the baseband processor may include one or more CPUs.
  • the transceiver module 1401 may be a radio frequency unit; the processing module 1402 may be a processor (or a processing circuit), such as a baseband processor.
  • the transceiver module 1401 may be an input and output interface of a chip (such as a baseband chip); the processing module 1402 may be a processor (or a processing circuit) of the chip system, and may include one or more central processing units.
  • transceiver module 1401 in the embodiment of the present application can be implemented by a transceiver or a transceiver-related circuit component;
  • processing module 1402 can be implemented by a processor or a processor-related circuit component (or, referred to as a processing circuit).
  • the transceiver module 1401 can be used to perform all transceiver operations performed by the communication device in the embodiments shown in Figures 10 to 13, and/or to support other processes of the technology described in this document;
  • the processing module 1402 can be used to perform all operations except the transceiver operations performed by the communication device in the embodiments shown in Figures 10 to 13, and/or to support other processes of the technology described in this document.
  • the transceiver module 1401 in FIG14 may be replaced by a transceiver, which may integrate the functions of the transceiver module 1401; the processing module 1402 may be replaced by a processor, which may integrate the functions of the processing module 1402. Furthermore, the communication device 140 shown in FIG14 may also include a memory.
  • the communication device 140 involved in the embodiment of the present application may also be the communication device 150 shown in FIG15 , wherein the processor may be a logic circuit 1501 and the transceiver may be an interface circuit 1502. Further, the communication device 150 shown in FIG15 may also include a memory 1503.
  • the embodiments of the present application also provide a computer program product, which can implement the functions of any of the above method embodiments when executed by a computer.
  • the embodiments of the present application also provide a computer program, which can implement the functions of any of the above method embodiments when executed by a computer.
  • the embodiment of the present application also provides a computer-readable storage medium. All or part of the processes in the above method embodiments can be completed by a computer program to instruct the relevant hardware, and the program can be stored in the above computer-readable storage medium. When the program is executed, it can include the processes of the above method embodiments.
  • the computer-readable storage medium can be an internal storage unit of the terminal (including the data sending end and/or the data receiving end) of any of the above embodiments, such as the hard disk or memory of the terminal.
  • the above computer-readable storage medium can also be an external storage device of the above terminal, such as a plug-in hard disk equipped on the above terminal, a smart memory card (smart media card, SMC), a secure digital (secure digital, SD) card, a flash card (flash card), etc. Further, the above computer-readable storage medium can also include both the internal storage unit of the above terminal and an external storage device.
  • the above computer-readable storage medium is used to store the above computer program and other programs and data required by the above terminal.
  • the above computer-readable storage medium can also be used to temporarily store data that has been output or is to be output.
  • At least one (item) means one or more, “more than one” means two or more, “at least two (items)” means two or three and more than three, and "and/or” is used to describe the association relationship of associated objects, indicating that three relationships may exist.
  • a and/or B can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural.
  • the character “/” generally indicates that the objects associated before and after are in an “or” relationship.
  • At least one of the following items” or similar expressions refers to any combination of these items, including any combination of single items or plural items.
  • At least one of a, b or c can mean: a, b, c, "a and b", “a and c", “b and c", or "a and b and c", where a, b, c can be single or multiple.
  • the disclosed devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another device, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may be one physical unit or multiple physical units, that is, they may be located in one place or distributed in multiple different places. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.
  • the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a readable storage medium.
  • the technical solution of the embodiment of the present application is essentially or all or part of the technical solution. It can be embodied in the form of a software product, which is stored in a storage medium and includes a number of instructions for enabling a device (which may be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application.
  • the aforementioned storage medium includes: U disk, mobile hard disk, ROM, RAM, disk or optical disk and other media that can store program codes.

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  • Engineering & Computer Science (AREA)
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  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Theoretical Computer Science (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Vision & Pattern Recognition (AREA)
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Abstract

La présente demande se rapporte au domaine technique des communications. L'invention concerne un procédé et un appareil de communication, qui peuvent réduire le retard de ralenti d'antenne d'un dispositif de lecture-écriture, de telle sorte que le temps nécessaire au dispositif de lecture-écriture pour inventorier des étiquettes est raccourci, et le taux d'inventaire est augmenté pendant un processus d'inventaire. Le procédé peut consister à : envoyer une signalisation d'interrogation au moyen d'une première antenne ; et si des premières informations provenant d'un premier dispositif ne sont pas détectées dans 2Q intervalles, commuter vers une seconde antenne pour envoyer la signalisation d'interrogation, la signalisation d'interrogation étant utilisée pour indiquer une première valeur de paramètre de comptage d'intervalles (Q), la première valeur Q valant 0, et la valeur Q étant utilisée pour tester le premier dispositif.
PCT/CN2023/123230 2022-10-21 2023-10-07 Procédé et appareil de communication WO2024082967A1 (fr)

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CN202211296381.3A CN117917670A (zh) 2022-10-21 2022-10-21 通信方法及装置
CN202211296381.3 2022-10-21

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103039036A (zh) * 2011-08-09 2013-04-10 华为技术有限公司 用户数量计算方法及系统
CN105224970A (zh) * 2015-10-09 2016-01-06 上海电机学院 一种rfid防碰撞方法
CN108052855A (zh) * 2018-01-08 2018-05-18 广西大学 适用于rfid系统的新型q值防碰撞算法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103039036A (zh) * 2011-08-09 2013-04-10 华为技术有限公司 用户数量计算方法及系统
CN105224970A (zh) * 2015-10-09 2016-01-06 上海电机学院 一种rfid防碰撞方法
CN108052855A (zh) * 2018-01-08 2018-05-18 广西大学 适用于rfid系统的新型q值防碰撞算法

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