WO2022141400A1 - 一种侦听方法及装置 - Google Patents

一种侦听方法及装置 Download PDF

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Publication number
WO2022141400A1
WO2022141400A1 PCT/CN2020/142143 CN2020142143W WO2022141400A1 WO 2022141400 A1 WO2022141400 A1 WO 2022141400A1 CN 2020142143 W CN2020142143 W CN 2020142143W WO 2022141400 A1 WO2022141400 A1 WO 2022141400A1
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WO
WIPO (PCT)
Prior art keywords
resource
reader
listening
information
tag
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Ceased
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PCT/CN2020/142143
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English (en)
French (fr)
Inventor
鲁振伟
吴毅凌
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Filing date
Publication date
Application filed by Huawei Technologies Co Ltd filed Critical Huawei Technologies Co Ltd
Priority to PCT/CN2020/142143 priority Critical patent/WO2022141400A1/zh
Priority to CN202080108239.4A priority patent/CN116671209B/zh
Priority to EP20967739.2A priority patent/EP4258774A4/en
Publication of WO2022141400A1 publication Critical patent/WO2022141400A1/zh
Priority to US18/342,971 priority patent/US12481847B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
    • G06K7/10356—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers using a plurality of antennas, e.g. configurations including means to resolve interference between the plurality of antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/40—Resource management for direct mode communication, e.g. D2D or sidelink
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
    • G06K7/10366—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications
    • G06K7/10475—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves the interrogation device being adapted for miscellaneous applications arrangements to facilitate interaction with further interrogation devices, e.g. such that at least two interrogation devices may function and cooperate in a network of such devices
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0248—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal dependent on the time of the day, e.g. according to expected transmission activity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/145—Passive relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/541—Allocation or scheduling criteria for wireless resources based on quality criteria using the level of interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]

Definitions

  • the present application relates to the field of communication technologies, and in particular, to a communication method and device for interception.
  • Radio Frequency Identification (RFID) technology is a non-contact automatic identification technology.
  • a reader or reader powers the tag device by sending an excitation signal to a low-cost tag.
  • the tag receives the signaling sent by the reader, and sends signaling to the reader through a backscatter signal, as shown in Figure 1.
  • the reader can identify the identification of the tag, and read and write operations on the tag.
  • multiple readers use the same resources to communicate with multiple tags, it may cause strong interference between readers, thereby reducing communication performance.
  • the present application provides a communication method and device between a reader and a tag, which can avoid readers that interfere greatly with each other from communicating with the tag in the same resource, thereby improving the communication performance between the reader and the tag.
  • the present application provides a communication method, and the execution body of the method may be a reader or a chip applied in the reader.
  • the following description takes the execution subject being the reader as an example.
  • the reader 1 (first device) receives scheduling information (first information) from the first network device.
  • the scheduling information indicates the first resource for the reader 1 to send the first listening signal and the second resource for the reader 2 to send the second listening signal.
  • the reader sends a first listening signal on the first resource.
  • the reader 1 receives the second listening signal from the reader 2 (the second device) on the second resource.
  • the reader 1 determines the first interception result according to the second interception signal.
  • the reader 1 sends the first listening result on the third resource.
  • the reader receives the second information on the fourth resource.
  • the reader 1 determines the fifth resource that the reader 1 communicates with the tag according to the second information. Then, the reader 1 communicates with the tag on the fifth resource.
  • the network device schedules listening resources for the reader, so that the network device (or reader) can obtain the mutual influence of different readers, and then the network device (or reader) can determine the communication between the reader and the tag according to the mutual influence between the readers. resources and improve resource utilization efficiency.
  • the present application provides a communication method, and the execution body of the method may be a network device or a chip applied in the network device.
  • the following description takes the execution subject being a network device as an example.
  • the network device sends scheduling information (first information).
  • the scheduling information indicates the first resource for the reader 1 to send the first listening signal and the second resource for the reader 2 to send the second listening signal.
  • the network device receives the first interception result from the reader 1 (the first device) at the third resource; and receives the second interception result from the reader 2 (the second device) at the sixth resource.
  • the network device determines information (second information) indicating the fifth resource that the reader 1 communicates with the tag according to the first interception result and the second interception result.
  • the network device sends the second information to the reader 1 on the fourth resource.
  • the network device schedules listening resources for the reader, so that the network device (or reader) can obtain the mutual influence of different readers, and then the network device (or reader) can determine the communication between the reader and the tag according to the mutual influence between the readers. resources and improve resource utilization efficiency.
  • the present application provides a communication method, and the execution body of the method may be a reader or a chip applied in the reader.
  • the following description takes the execution subject being the reader as an example.
  • the reader 2 (the second device) receives the first information from the first network device, and the first information instructs the reader 1 to send the first resource of the first listening signal and the reader 2 to send the second resource of the second listening signal. resource.
  • the reader 2 sends a second listening signal on the second resource.
  • the reader 2 receives the first listening signal from the reader 1 (the first device) on the first resource.
  • the reader 2 determines the second interception result according to the first interception signal.
  • the reader 2 receives second information on the sixth resource, the second information indicating the fifth resource with which the reader 1 communicates with the tag.
  • the reader 2 determines the seventh resource that the reader 2 communicates with the tag according to the second listening result and the second information. And send information indicating the seventh resource. Reader 2 communicates with the tag on the seventh resource. The reader does not send the listening result, but sends information indicating the resource for communication between the reader and the tag, which is beneficial to reduce signaling overhead.
  • the present application provides a communication method, and the execution body of the method may be a reader, or a chip applied in the reader.
  • the following description takes the execution subject being the reader as an example.
  • the reader 2 receives first information from the first network device, where the first information indicates the first resource and the second resource.
  • the reader 2 receives the first listening signal and the second information from the reader 1 on the first resource, and the second information indicates the fifth resource that the reader 1 communicates with the tag.
  • the reader 2 determines the second interception result according to the first interception signal.
  • the reader 2 determines the seventh resource that the reader 2 communicates with the tag according to the second listening result and the second information.
  • the reader 2 sends a second listening signal and information indicating the seventh resource on the second resource. Reader 2 communicates with the tag on the seventh resource.
  • the reader sends the listening signal and the resource indicating the communication between the reader and the tag through one resource, which can reduce the delay.
  • the reader 1 sends the first listening result in the following manner.
  • the reader 1 sends the first listening result to the first network device or the reader 1 (the first device) sends the first listening result to the reader 2 (the second device).
  • the reader 1 sends the first interception result to the first network device
  • the reader 1 receives the second information from the first network device.
  • the network device can schedule resources for each reader to communicate with the tag, thereby improving the communication performance between the reader and the tag.
  • the reader 1 sends the first interception result to the reader 2
  • the reader 1 receives the second information from the reader 2, and the second information includes the second interception result of the reader 2.
  • the reader 1 determines the fifth resource according to the second interception result and the first interception result.
  • the reader sends the listening result to other readers.
  • the reader determines the resources to be occupied to communicate with the tag according to the pre-defined rules through the received listening results of other readers, which reduces the signaling overhead with the base station.
  • the resource (third resource) from which the reader 1 sends the first listening result is associated with the resource (the first resource) from which the reader 1 sends the listening signal.
  • the resource that the reader sends the listening result is associated with the resource (the first resource) from which the reader 1 sends the listening signal.
  • the resource (fourth resource) for the reader 1 to receive the second information is associated with the resource (the second resource) for the reader 1 to receive the second listening signal.
  • the resource for the reader to receive the second information has an associated relationship with the resource for receiving the listening signal before, which can save the overhead of the network device.
  • the interception result includes a measurement value of the second interception signal by the reader 1 .
  • the listening result includes the comparison result of the measurement value of the second listening signal by the reader 1 and the threshold.
  • the reader sends the measurement value, and the receiving side can obtain more information, which is helpful for the receiving side to determine the resources of the communication between the reader and the tag.
  • the reader sends the comparison result between the measured value and the threshold, which can save the overhead of sending the measured value.
  • the first resource, the second resource, the third resource, the fourth resource and the fifth resource are time domain resources.
  • the first information indicates at least one of the following parameters:
  • the starting position of the first resource set where the first resource set includes the first resource and the second resource
  • the index of the second resource in the first resource set is the index of the second resource in the first resource set.
  • the fifth resource belongs to the second resource set.
  • the second information indicates at least one of the following parameters:
  • the index of the fifth resource in the second resource set is the index of the fifth resource in the second resource set.
  • the listening signal is a reference signal.
  • the second information indicates the identification of one or more devices scheduled to communicate with the tag (identification of the reader).
  • Scheduled readers and unscheduled readers can know which reader is scheduled.
  • the unscheduled reader can determine whether to send the listening signal and the resources to send the listening signal in the subsequent listening process, without the need for the base station to schedule the resources for sending the listening signal, saving the signaling overhead of the base station and the reader and scheduling delays.
  • the first information is carried in at least one of the following signaling:
  • the second information is carried in at least one of the following signaling:
  • Unicast signaling multicast signaling and broadcast signaling. That is to say, the first information and the second information can be sent by unicast, multicast or broadcast. It can also be sent by any combination of unicast, multicast or broadcast.
  • the first listening result includes a measurement value of the second listening signal.
  • the fifth resource does not overlap with the seventh resource.
  • the fifth resource is the same as the seventh resource. According to the interaction between readers, determining whether to occupy the same resource can improve resource utilization.
  • a communication device in a fifth aspect, has a function of implementing the behavior in the method example of the first aspect.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus includes a transceiver unit configured to receive first information from a first network device, where the first information indicates the first resource and the second resource.
  • the transceiver unit is further configured to send the first listening signal on the first resource, and receive the second listening signal from the second device on the second resource.
  • the communication device further includes a processing unit configured to determine a first listening result according to the second listening signal.
  • the transceiver unit is further configured to send the first listening result on the third resource, and receive the second information on the fourth resource.
  • the processing unit is further configured to determine the fifth resource according to the second information.
  • the transceiver unit is further configured to communicate with the tag on the fifth resource.
  • a communication device in a sixth aspect, has a function of implementing the behavior in the method example of the second aspect above.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus includes a transceiver unit for sending first information, where the first information indicates a first resource and a second resource, the first resource is used for the first device to send the first listening signal, and the second resource for the second device to send the second listening signal.
  • the transceiver unit is further configured to receive the first monitoring result from the first device on the third resource, and receive the second monitoring result from the second device on the sixth resource.
  • the communication apparatus further includes a processing unit configured to determine second information according to the first interception result and the second interception result, where the second information indicates a fifth resource for communication between the first device and the tag.
  • the transceiver unit is further configured to send the second information to the first device on the fourth resource.
  • a communication device having the function of implementing the behavior in the method example of the third aspect.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus includes a transceiver unit configured to receive first information from a first network device, where the first information indicates the first resource and the second resource.
  • the transceiver unit is further configured to send the second listening signal on the second resource, and receive the first listening signal from the reader 1 (the first device) on the first resource.
  • the communication device further includes a processing unit configured to determine a second listening result according to the first listening signal.
  • the transceiver unit is further configured to receive second information on the sixth resource, where the second information indicates the fifth resource that the reader 1 communicates with the tag.
  • the processing unit is further configured to determine the seventh resource according to the second listening result and the second information.
  • the transceiver unit is further configured to send information indicating the seventh resource.
  • the transceiver unit is further configured to communicate with the tag on the seventh resource.
  • a communication device having the function of implementing the behavior in the method example of the fourth aspect.
  • the functions can be implemented by hardware, or can be implemented by hardware executing corresponding software.
  • the hardware or software includes one or more modules corresponding to the above functions.
  • the communication apparatus includes a transceiver unit configured to receive first information from a first network device, where the first information indicates the first resource and the second resource.
  • the transceiver unit is further configured to receive the first listening signal and the second information from the reader 1 on the first resource, where the second information indicates the fifth resource that the reader 1 communicates with the tag.
  • the communication device further includes a processing unit configured to determine a second listening result according to the first listening signal.
  • the processing unit is further configured to determine the seventh resource according to the second listening result and the second information.
  • the transceiver unit is further configured to send the second listening signal and information indicating the seventh resource on the second resource.
  • the transceiver unit is further configured to communicate with the tag on the seventh resource.
  • a communication device is provided, and the communication device may be the reader in the above method embodiments, or a chip provided in the reader.
  • the communication device includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface.
  • the processor executes the computer program or instructions, the reader is made to execute the method performed by the reader in the above method embodiments.
  • a communication apparatus is provided, and the communication apparatus may be the network device in the above method embodiment, or a chip provided in the network device.
  • the communication device includes a communication interface, a processor, and optionally, a memory.
  • the memory is used to store computer programs or instructions, and the processor is coupled to the memory and the communication interface, and when the processor executes the computer program or instructions, the communication apparatus executes the method performed by the network device in the above method embodiments.
  • a computer program product comprising: computer program code, which when executed, causes the method performed by the reader in the above aspects to be performed.
  • a twelfth aspect provides a computer program product, the computer program product comprising: computer program code, when the computer program code is executed, the method performed by the network device in the above aspects is performed.
  • the present application provides a chip system, where the chip system includes a processor for implementing the functions of the reader in the methods of the above aspects.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a chip system, where the chip system includes a processor for implementing the functions of the network device in the methods of the above aspects.
  • the chip system further includes a memory for storing program instructions and/or data.
  • the chip system may be composed of chips, or may include chips and other discrete devices.
  • the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method executed by the reader in the above aspects is implemented.
  • the present application provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed, the method performed by the network device in the above aspects is implemented.
  • the present application provides a communication system including a network device and a reader.
  • the network device implements the methods performed by the network device in the above aspects.
  • the reader implements the methods performed by the reader in the above aspects.
  • FIG. 1 is a schematic diagram of a possible communication between a reader and a tag in an embodiment of the application
  • FIG. 2 is a schematic diagram of a possible communication architecture in an embodiment of the present application.
  • FIG. 3 is a schematic diagram of the mutual interference of communication between two readers and tags according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of two readers communicating with tags through time division multiplexing according to an embodiment of the present application
  • FIG. 5 is a schematic diagram of two readers communicating with tags in the same time domain unit according to an embodiment of the present application
  • FIG. 6 is a schematic diagram of a listening method according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of another interception method according to an embodiment of the present application.
  • FIG. 8 is a schematic diagram of yet another interception method according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of yet another interception method according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of yet another interception method according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of still another interception method according to an embodiment of the present application.
  • FIG. 12 is a schematic diagram of still another interception method according to an embodiment of the present application.
  • FIG. 13 is a schematic diagram of still another interception method according to an embodiment of the present application.
  • FIG. 14 is a schematic diagram of still another interception method according to an embodiment of the present application.
  • 15 is a schematic diagram of still another interception method according to an embodiment of the present application.
  • FIG. 16 is a schematic diagram of still another interception method according to an embodiment of the present application.
  • FIG. 17 is a schematic diagram of still another interception method according to an embodiment of the present application.
  • FIG. 19 is a schematic diagram of a communication apparatus 1900 according to an embodiment of the present application.
  • FIG. 20 is a schematic diagram of a communication apparatus 2000 according to an embodiment of the present application.
  • a receives information from B A can directly receive the information sent by B to A. A can also receive the information sent by B through the intermediate device C. That is, B sends the information to C, and C sends the information to A.
  • Unicast refers to the point-to-point communication between the sender (such as a network device) and the receiver (such as a reader).
  • the destination of the information sent by the network device is one reader, but not other readers.
  • Multicast refers to one-to-many communication between a sender (such as a network device) and multiple receivers (such as readers). For example, information sent by a network device is destined for a plurality or group of readers.
  • Broadcast refers to the one-to-many communication between a sender (such as a network device) and all receivers (such as readers) currently belonging to the sender. For example, the destination of information sent by a network device currently belongs to all readers of the network device.
  • Time-frequency resources are divided into orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing Access, OFDM) or single carrier frequency division multiplexing access (Single Carrier–Frequency Division Multiplexing Access, SC-FDMA) in the time dimension ) symbols, and subcarriers in the frequency domain dimension, which form the time-frequency resource grid.
  • OFDM Orthogonal Frequency Division Multiplexing Access
  • SC-FDMA Single Carrier–Frequency Division Multiplexing Access
  • the smallest resource granularity in this grid is called a resource unit (Resource Element, RE), which represents a time-frequency grid point composed of a time-domain symbol in the time domain and a subcarrier in the frequency domain.
  • the subcarrier spacing is 15KHz, 30KHz, 60KHz, etc.
  • Physical resource block (Physical Resource Block, PRB) is the basic unit of frequency domain resource scheduling, a physical resource block fixedly contains 12 frequency domain subcarriers; time slot (slot) is one of the basic units of time domain resources, a time slot Generally, it contains 14 time-domain symbols, or a time slot generally contains 7 time-domain symbols.
  • a subframe is also one of the basic units of time domain resources and is fixed at 1 millisecond. For the subcarrier spacing of 15KHz, each subframe includes 14 time domain symbols.
  • the reference signal can be a sequence known to both the transceiver and the receiver.
  • the reference signal is used to demodulate data on the receiving side (such as a demodulation reference signal (Demodulation Reference Signal, DMRS), a cell reference signal (Cell-specific Reference Signal, CRS), etc.), or the receiving side performs measurement (such as a channel sounding reference signal ( Sounding Reference Signal, SRS), Channel State Information Reference Signal (Channel State Information Reference Signal, CSI-RS), etc.
  • DMRS demodulation Reference Signal
  • CRS Cell-specific Reference Signal
  • CSI-RS Channel State Information Reference Signal
  • Demodulation reference signal a signal that is inserted into the data channel or the control channel and transmitted together, and is mainly used at the receiving side to estimate the physical channel condition and then demodulate the transmission information.
  • Time domain resource unit may be one or more subframes, one or more time slots, or one or more time domain symbols.
  • a frequency domain resource unit may be one or more PRBs.
  • a frequency domain resource unit may also be one or more REs.
  • Resource unit It consists of a time-domain resource unit and a frequency-domain resource unit.
  • A indicates B, which can be explicit or implicit.
  • Implicit indication A indirectly indicates B, that is, A does not directly indicate the information of B, but indicates other information, but B can be determined through other information.
  • a network device can be an access network device, and an access network device can also be called a radio access network (RAN) device, which is a device that provides wireless communication functions for terminal devices.
  • Access network equipment includes, but is not limited to, the next generation base station (generation nodeB, gNB), evolved node B (evolved node B, eNB), baseband unit (baseband unit, BBU) in 5G, transmitting and receiving points (transmitting and receiving), for example, but not limited to: point, TRP), transmitting point (transmitting point, TP), the base station in the future mobile communication system or the access point in the WiFi system, etc.
  • the access network device may also be a wireless controller, a centralized unit (centralized unit, CU), and/or a distributed unit (DU) in a cloud radio access network (cloud radio access network, CRAN) scenario, or a network
  • the device may be a relay station, a vehicle-mounted device, and a network device in a future evolved network.
  • Terminal equipment Terminal equipment may be referred to as terminal for short, also called user equipment (user equipment, UE), which is a device with wireless transceiver function. Terminal equipment can be deployed on land, including indoor or outdoor, handheld or vehicle; can also be deployed on water (such as ships, etc.); can also be deployed in the air (such as aircraft, drones, balloons and satellites, etc.).
  • the terminal equipment can be a mobile phone, a tablet computer, a computer with wireless transceiver function, virtual reality terminal equipment, augmented reality terminal equipment, wireless terminal equipment in industrial control, wireless terminal equipment in unmanned driving, and wireless terminal equipment in telemedicine.
  • Terminal devices can also be stationary or mobile.
  • a reader is a device that communicates with a tag, sends excitation signals to the tag, and/or sends/receives RFID signaling to/from the tag.
  • the reader can be a network device or a terminal device.
  • RFID It is a non-contact automatic identification technology. Its basic principle is to use the spatial coupling of radio frequency signals or the transmission characteristics of radar reflection to realize automatic identification of identified objects.
  • the reader communicates wirelessly with the RFID electronic tag through the antenna, and can read or write the tag identification code and memory data.
  • the tag receives the signal sent by the reader, and is used to drive the internal circuit for encoding, decoding, modulation, demodulation and other operations, and reflects the signal sent by the reader, and modulates the information to be transmitted on the reflected signal to send to the reader. signaling.
  • Tags can be classified as passive, active, semi-passive (or semi-active) tags.
  • Passive tags have no power supply, and internal processing and reflected signals depend on the excitation signal of the reader; active tags have internal power supply, and internal processing and reflected signals can be independent of the excitation signal of the reader; while semi-passive tags have internal power supply, internal The processing and reflection signals can utilize the power supply and the excitation signal of the reader.
  • the reader conducts RFID communication with the tags within the coverage area, obtains the identification (ID) of the tags, and learns which tags are within the coverage area (the tags are attached to the goods), which can be realized in the scenarios such as stores and warehouses. Counting (palletizing) the goods.
  • FIG. 2 it is a schematic diagram of a possible network architecture applicable to this embodiment of the application, including a network device 110 ; including a reader 120 , and the reader 120 includes readers 1 and 2 ; including a tag 130 , and the tag 130 includes the tag 1 and 2.
  • the communication of the reader 120 tag is divided into a forward link and a reverse link.
  • the link where the reader 120 sends data to the tag is the forward link; the link where the reader 120 receives data from the tag is the reverse link.
  • the reader 120 may be connected with the tag 130 in a wireless manner, and the reader 120 may be connected with the network device 110 in a wired or wireless manner.
  • the tag 120 may be in a fixed position or may be movable, which is not limited.
  • the network architecture shown in FIG. 2 may further include other network devices, such as wireless relay devices and wireless backhaul devices, which are not limited.
  • the number of network devices, readers and tags is not limited.
  • LTE Long Term Evolution
  • 5G fifth generation
  • future mobile communication systems etc.
  • the reader 1 performs RFID communication with the tag 1
  • the reader 2 performs RFID communication with the tag 2
  • the reader 1 and the reader 2 communicate with the tags 1 and 2 independently and without coordination. Reader 1 and Reader 2 send signals at the same time.
  • the distance between readers 1 and 2 is relatively close, and at the same time, it causes great interference to the other party, which affects normal RFID communication and reduces the coverage of the readers.
  • the network device coordinates RFID communications between multiple readers and tags
  • the readers conduct RFID communications with the tags is scheduled by the network device.
  • the network device schedules time division multiplexing between readers.
  • Figure 4 shows the results of the network device scheduling the reader.
  • the network device schedules reader 1 to perform RFID communication with the tag first, and then schedules reader 2 to perform RFID communication with the tag after that.
  • the network equipment schedules complete time division multiplexing between readers, which can avoid interference between readers, but some readers can send signals at the same time without causing interference, which will cause insufficient utilization of time domain resources. The communication efficiency between the reader and the tag is reduced.
  • the network device schedules readers to transmit at the same time (or the transmission times may overlap, etc.). As shown in Figure 5, the network device schedules reader 1 and reader 2 to transmit at the same time. In this case, the network device cannot accurately know which readers can send signals at the same time. Therefore, the network device may schedule a plurality of readers to send signals at the same time, which may cause greater mutual interference.
  • the resources may be resources such as time domain resources, frequency domain resources, code domain resources or air domain resources.
  • the resources can also be any combination of time-domain resources, frequency-domain resources, code-domain resources, or spatial-domain resources.
  • the resources are time-frequency resources, or the resources are time-frequency resources and code domain resources.
  • the network device in this application scenario may be the network device 110 in FIG. 2
  • the reader may be the reader 120 in FIG. 2
  • the tag may be the tag 130 in FIG. 2
  • Figure 6 shows a schematic diagram of the communication between the reader and the tag.
  • reader 1 may be the first device; reader 2 may be the second device.
  • the labels in Figure 6 are multiple.
  • Readers 1 and 2 communicating with tags generally means that readers 1 and 2 are communicating with different tags, respectively.
  • reader 1 communicates with tag 1; reader 2 communicates with tag 2.
  • the number of readers in FIG. 6 is not limited to two, and there may also be readers 3, 4, and so on.
  • the communication process may include:
  • S601 The network device sends first information to the reader.
  • the reader sends a sensing signal, and receives the sensing signals of other readers.
  • the reader determines the interception result according to the received interception signal.
  • the reader measures the listening signals sent by other readers, such as the reference signal received power (RSRP), the received signal strength indicator (RSSI), the signal-to-interference and noise ratio of the signal. (signal to interference plus noise ratio, SINR), etc.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • SINR signal-to-interference and noise ratio of the signal.
  • readers 1 and 2 measure each other's listening signals respectively, and obtain their own listening results.
  • the listening result may include the above-mentioned measurement value of the listening signal.
  • the listening result may also include the comparison result of the measured value and the threshold.
  • the listening result may also include a comparison result of multiple time-domain resource units, for example, indicated by a bitmap.
  • the network device sends the second information to the reader.
  • the second information indicates the communication resources of the reader and the tag.
  • S606 reader and tag communication.
  • the network device schedules listening resources for the reader, so that the network device can obtain the influence of different readers, and then the network device can determine the resources for communication between the reader and the tag according to the mutual influence between the readers, improving the resource utilization efficiency.
  • steps S601-S606 are further described.
  • the network device sends the first information to the reader 1 and the reader 2. That is, the reader receives the first information from the network device.
  • the first information indicates at least one of the following parameters:
  • the starting position of the first resource set where the first resource set includes the first resource and the second resource;
  • the first set of resources is the set of resources used by the reader to send listening signals.
  • the first information is used to schedule listening signals.
  • the first information indicates the first resource and the second resource. .
  • the first resource is used for the reader 1 to send the first listening signal
  • the second resource is used for the reader 2 to send the second listening signal.
  • the network device may send the first message to the readers (eg, readers 1 and 2) in a multicast or broadcast manner.
  • the network device may also send the first information to multiple readers (eg, readers 1 and 2) in a unicast manner.
  • the network device sends the first information to the reader respectively in a unicast manner.
  • the first information indicates the number of resource units in the listening resource set (first resource set), the starting position of the listening resource set, and the index of the resource unit that sends the listening signal of the reader in the listening resource set.
  • the first information sent by the base station to the reader 1 indicates the starting position of the listening resource set, a total of 3 unit (unit) listening resources are allocated (the number of resource units in the resource set is 3), and the Reader 1 allocates a resource unit with an index of 1 (the index of the resource unit of the reader for sending the listening signal in the listening resource set is 1).
  • the first information sent by the base station to the reader 2 indicates the starting position of the listening resource set, a total of 3 resource units are allocated, and the reader 2 is allocated a resource unit with an index of 2.
  • the first information sent by the base station to the reader 3 (not shown in FIG. 6 ) indicates the starting position of the listening resource set, a total of 3 resource units are allocated, and a resource with an index of 3 is allocated to the reader 3 .
  • the network device notifies the readers 1 to 3 of the starting position of the first resource set through the first information.
  • the first information indicates an offset between a time domain position where the first information is located and a start position of the first resource set.
  • the network device sends the first message in the kth time slot.
  • the network device informs the readers 1 to 3 through signaling that the starting position of the first resource set (the resource set for listening to the signal) is the k+4th time slot.
  • the offset between the time domain position where the first information is located and the starting position of the first resource set may be defined in a predefined manner.
  • the network device sends the first message in the kth time slot, and the predefined time slot k+3 is the starting position of the first resource set.
  • the readers 1 to 3 After the readers 1 to 3 receive the corresponding first information, they can know where the listening resources start according to the starting position of the listening resource set, and can know the position of each listening resource according to the total number of resource units in the listening resource set. (Assuming that the structure and size of each listening resource are fixed), the location of resources allocated to itself can be known according to the resource unit index, and then the locations of resources allocated to other readers can be known.
  • the reader 1 receives the first message to the reader 1, indicating the starting position of the listening resource set, and the number of units of the listening resource set is 3. And the resource unit whose index is 1 is the resource that the reader 1 sends the listening signal.
  • Reader 1 can obtain resource units with indexes 2 and 3, which are resources for other readers to send listening signals. Reader 1 measures the listening signals sent by other readers on resource units with indexes 2 and 3.
  • the network device sends the first information in a multicast/broadcast manner.
  • the first information indicates the starting position of the listening resource set, and the respective indexes of the resource units that send the listening signal of the multiple readers in the listening resource set.
  • the first information indicates the starting position of the listening resource set, the resource with index 1 is allocated to the listening signal sent by reader 1, the resource with index 2 is allocated to reader 2, and the resource with index 2 is allocated to reader 3 resource with index 3.
  • the reader After the reader receives the control information, it can know where the resource starts according to the starting position of the listening resource set, and can know the position of the resource allocated to itself and other readers according to the index of each resource unit.
  • the time domain relationship between the start position of the listening resource set (it is assumed to be the start position in the time domain) and the end position of the first information is fixed, for example, the first information ends at the nth time slot.
  • the listening resource set starts from the n+4th time slot.
  • the resource set fixedly includes 3 resource units, and each resource unit (or each resource) has a fixed size (for example, one time slot). Then, the starting position of the listening resource set, the number of resource units in the resource set, and the size of each resource unit need not be indicated by the content of the first information.
  • the resource index allocated by the reader 1 in the resource set is indicated.
  • the sizes of the first resource and the second resource are fixed values, such as being fixed to be one time slot, no additional indication is required.
  • the sizes of the first resource and the second resource may have multiple value sets, the sizes of the first resource and the second resource may be indicated by the first information.
  • the size of the first resource and the second resource may be 7 symbols, 1 slot or 2 slots.
  • the size of the first resource and the second resource may be indicated by the first information.
  • Table 1 shows the resources allocated by network devices to different readers.
  • time-frequency resources there are 3 units of time-domain resources in the time domain, and 2 units of frequency-domain resources in the frequency domain.
  • a time-domain resource unit and a frequency-domain resource unit constitute a resource unit, with a total of 6 units. resource unit.
  • the indices of 2 frequency domain resource units are indexed in ascending order of frequency, that is, the index of the frequency domain resource unit with low frequency is small; the three time domain resource units are indexed in ascending order of time domain position. It is assumed that the predefined relationship between the index of the resource unit and the time domain index and the frequency domain index is: the resource units are indexed according to the order from small to large in the frequency domain and then in the time domain, as shown in Table 2.
  • the first information sent by the network device to the reader 1 indicates the starting position of the listening time domain resources, a total of 3 time domain listening resource units are allocated, and 2 frequency domain resources are allocated.
  • the location of the unit, and the time-frequency resources with resource indices 1 and 6 are allocated to the reader 1 for sending listening signals.
  • the first information sent to the reader 2 indicates the starting position of the listening time-domain resources, a total of 3 time-domain listening resource units are allocated, the positions of the allocated 2 frequency-domain resource units, and to the reader 2 Time-frequency resources with resource index 2 and 3 are allocated for sending listening signals.
  • the first information sent to the reader 3 indicates the starting position of the listening time-domain resources, a total of 3 time-domain listening resource units are allocated, the positions of the allocated 2 frequency-domain resource units, and to the reader 2 Time-frequency resources with resource index 4 and 5 are allocated for sending listening signals.
  • each reader sends its own listening signal on its allocated time domain resources.
  • the reader 1 sends the first listening signal on the first resource (the resource unit whose time domain resource index is 1).
  • the reader 1 is taken as an example.
  • the reader 1 receives the listening signal (the second listening signal) from the reader 2, and determines the first listening result according to the second listening signal.
  • the first interception result includes the RSRP of the interception signal received by the reader 2 measured by the reader 1, and the like.
  • the reader sends the listening result to the network device.
  • readers 1 and 2 respectively send the listening results to the network device.
  • the reader 1 sends the first listening result on the third resource.
  • the reader sends the measurement value, and the receiving side can obtain more information, which is helpful for the receiving side to determine the resources for the communication between the reader and the tag.
  • the reader sends the comparison result between the measured value and the threshold, which can save the overhead of sending the listening result.
  • the network device sends the second information to the reader.
  • the second information indicates the communication resource (fifth resource) of the reader and the tag.
  • the network device determines the resources that each reader communicates with the tag according to the received listening results, and sends the determined resources to the readers respectively.
  • the network device determines the resources of each reader in order from high to low according to the listening results of each reader and the priority of each reader. For example, the reader with the highest priority allocates the first A resource, and then determine whether the reader with the second priority can allocate the same resource as the reader with the highest priority. If so, the reader with the second priority will also allocate the first resource.
  • the second reader allocates the second resource, and so on, and will not be repeated here.
  • the network device determines the resources of the communication between the reader 1 and the reader 2 and the tag according to the listening results of the reader 1 and the reader 2 . For example, the network device determines the time domain resource 1 in which the reader 1 communicates with the tag, and the time domain resource 2 in which the reader 2 communicates with the tag. The network device sends the second information indicating the time domain resource 1 to the reader 1 through the fourth resource. Correspondingly, the reader 1 receives the second information on the fourth resource. The network device sends the second information indicating the time domain resource 2 to the reader 2 . By receiving the listening result sent by the reader, the network device can schedule resources (fifth resources) for each reader to communicate with the tag, thereby improving the communication performance between the reader and the tag.
  • the second information indicates at least one of the following parameters:
  • the index of the resource that the reader communicates with the tag in the second resource set is the index of the resource that the reader communicates with the tag in the second resource set.
  • the fifth resource is the resource that the reader communicates with the tag.
  • the fifth resource belongs to the second resource set. There may be multiple indexes in the second resource set for the resources that the reader communicates with the tag. For example, the resource (the fifth resource) that the reader 1 communicates with the tag is at index 1 of the second resource set, and the resource that the reader 2 communicates with the tag is at the index 2 of the second resource set.
  • the network device sends the second information to each scheduled reader in a unicast manner.
  • the second information sent by the network device to the reader 1 indicates the starting position of the second resource set for communication between the reader and the tag, the second resource set includes 2 resource units, and is sent to the reader. 1
  • the resource unit of index 1 is allocated.
  • the second information sent by the base station to the reader 2 indicates the starting position of the second resource set for communication between the reader and the tag, the second resource set includes 2 resource units, and the reader 2 is assigned the resource of index 2 unit.
  • the second information sent by the base station to the reader 3 indicates the starting position of the second resource set for the communication between the reader and the tag, the second resource set includes 2 resource units, and the reader 3 is assigned the resource of index 2 unit.
  • the network device sends the second information to the reader by means of multicast or broadcast, indicating the communication resources between the reader and the tag. For example, the network device multicasts or broadcasts the second information to the readers 1 to 3, indicating the starting position of the second resource set for communication between the reader and the tag, the second resource set includes 2 resource units, and to the readers 1 is assigned the resource unit of index 1, and readers 2 and 3 are assigned the resource unit of index 2.
  • the time domain relationship between the start position of the second resource set and the end position of the second information is fixed. If the second information ends in the nth time slot, the second resource set starts from the n+4th time slot. Time slot starts.
  • the second resource set fixedly includes 2 resource units, and each resource unit (or each resource) has a fixed size (for example, both are 2s). Then, the second information indicates the resource index allocated in the second resource set to the scheduled reader, without indicating the starting position of the second resource set and the number of resource units included in the second resource set.
  • the reader determines a fifth resource according to the received second information, and uses the fifth resource to communicate with the tag.
  • the communication between the reader and the tag may be an inventory communication.
  • other operations on the tag by the reader such as reading and writing memory, may also be included.
  • the first information and the second information may be physical layer control information, such as downlink control information (DCI); the first information and the second information may be medium access control (medium access control, MAC) information, such as MAC Control element (control element, CE); the first information, the second information can be radio resource control (radio resource control, RRC) information, such as RRC dedicated or public signaling, or a field in a certain RRC dedicated or public signaling Wait.
  • the first information may be sent through one or more pieces of signaling. For example, the resource index allocated to the reader is notified by unicast (such as through DCI); and the starting position of the first resource set, the total number of resources, etc. can be notified by multicast or broadcast (such as through RRC public signaling).
  • the second information may also be sent via one or more signalings.
  • the resource index allocated to the reader to communicate with the tag is notified by unicast (such as through DCI); and the starting position of the second resource set, the total number of resources, etc. can be notified by multicast or broadcast ( e.g. via RRC common signaling). That is, the first information is carried in at least one of the following signaling: unicast signaling, multicast signaling, and broadcast signaling.
  • the second information is carried in at least one of the following signaling: unicast signaling, multicast signaling, and broadcast signaling.
  • the first resource, the second resource, the third resource, the fourth domain resource, and the fifth resource are time domain resources.
  • the reader determines the resource to communicate with the tag by itself according to the listening result.
  • FIG. 7 is based on FIG. 6 . Differences from FIG. 6 are mainly described below.
  • S601-S603 before S704 are similar to S601-S603 in FIG. 6 . Refer to S601-S603 in FIG. 6 , which will not be repeated.
  • the reader sends the listening result.
  • FIG. 6 is that the reader sends the listening result to the base station.
  • the reader sends the listening result to other readers.
  • reader 1 sends the first listening result to reader 2 on the third resource.
  • the first interception result includes the RSRP of the interception signal received by the reader 2 measured by the reader 1, and the like.
  • reader 2 sends the second listening result of reader 2 to reader 1. That is, the reader 1 receives the second information from the reader 2, and the second information includes the second listening result of the reading 2.
  • S705 The reader determines the resource for communicating with the tag.
  • S606 Communicate with the tag. This step is similar to S606 in FIG. 6 and will not be repeated here.
  • the reader sends its own listening results to other readers to other readers, and receives the listening results sent by other readers.
  • the reader 1 sends the listening result of the reader 2 to the reader 2, and vice versa.
  • the reader determines the resources to be occupied to communicate with the tag according to the predefined rules according to the received listening results of other readers, avoiding signaling and scheduling overhead for communication with the base station.
  • the resource (third resource) that the reader sends the listening result may be associated with the resource (the first resource) that the reader sends the listening signal.
  • the network device allocates resources to send listening signals to 3 readers.
  • the network device allocates resource 1 for sending listening signals to reader 1, resource 2 for sending listening signals to reader 2, and resource 3 for sending listening signals to reader 3.
  • Resource A for which reader 1 sends a listening result, is associated with resource 1;
  • resource B for which reader 2 sends a listening result, is associated with resource 2;
  • resource C where reader 3 sends a listening result, is associated with resource 3.
  • the order in which the reader sends the listening result is the same as the order in which the reader sends the listening signal. Compared with Reader 2, Reader 1 sends the listening signal first and sends the listening result first.
  • the resource from which the reader sends the listening result may also be associated with the reader's number or identifier.
  • the resource for some readers to communicate with the tag has been determined in advance, and at this time, the reader may not send the listening result.
  • the number of readers sending the listening result and the number of readers sending the listening signal are different.
  • reader 1 does not send listening results.
  • Resource A to which reader 2 sends the listening result is associated with resource 2.
  • Resource B from which reader 3 sends the listening result is associated with resource 3.
  • the order of resource A, resource B and resource C in the time domain is that resource A is earlier than resource B, and resource B is earlier than resource C.
  • Reader 1 sends the listening result
  • Reader 1 sends the listening result on Resource A.
  • the reader 2 sends the listening result on the resource A, which can reduce the communication delay of the reader 2.
  • the starting position of the resource set (the third resource set) for the readers (eg, readers 1, 2 and 3) to send the listening result can be determined according to the ending position of the first resource set, such as one of the two There is an interval between them, for example, the end of the first resource set is in time slot n, and the starting position of the third resource set is in time slot n+4, the interval can be a predefined value, or through signaling (such as the first information) to instruct.
  • the association relationship between the third resource and the first resource is that the index of the third resource in the third resource set is associated with the first resource.
  • the reader 1 determines the starting position of the third resource set according to the above method, and then determines the third resource therein.
  • the interval there is an interval between the end of the first resource and the start position of the third resource.
  • the end of the first resource is at time slot n
  • the start position of the third resource is at time slot n+4
  • the interval can be A predefined value, or indicated by signaling (eg, the first information).
  • the resource (fourth resource) for the reader to receive the second information is associated with the resource (the second resource) for the reader to receive the second listening signal.
  • the resource for the reader to receive the second information has an associated relationship with the resource for receiving the listening signal before, which can save the overhead of the network device.
  • time domain resources it is further described how, in S705, the readers determine the resources to be occupied for communicating with the tag according to the predefined rules according to the received listening results of other readers.
  • the reader determines the time domain resource for communicating with the tag according to each listening result, and communicates with the tag through the time domain resource.
  • a possible way of determining the time domain resources may be to determine the time domain resources according to a predetermined priority.
  • the priority may be the index of the listening signal resource sent by the reader indicated in the first information (eg, the index of the first resource in the first resource set). The smaller the index value, the higher the priority, etc.
  • Each reader considers the time domain resource occupancy of readers with a higher priority than itself.
  • the priority is Reader 1 > Reader 2 > Reader 3.
  • the first time domain resource is pre-defined.
  • reader 2 it is known that reader 1 occupies the first time domain resource fixedly.
  • candidate resources for reader 2 are the first and second time domain resources.
  • the reader 2 determines whether it can occupy the same time domain resources for communicating with the tag as the reader 1 according to at least one of the interception result of the reader 1 and the received interception result of the reader 1 to the reader 2 .
  • the mutual interference between reader 1 and reader 2 is very small (for example, both are less than a threshold), then reader 2 also occupies the first time domain resource.
  • Reader 2 and Reader 1 cannot communicate with tags using the same time domain resources. Then the reader 2 occupies the second time domain resource to communicate with the tag. Similarly, for reader 3, its candidate resources are the first, second and third time domain resources. At this time, the reader 3 knows the time domain resources of the communication between the reader 1 and the tag. The reader 3 obtains the interference between the readings 1 and 2 according to at least one of the received listening results of the readings 1 and 2, and adopts the same method as the reader 2 to determine the time domain resources of the communication between the reader 2 and the tag. For example, reader 1 uses the first time domain resource, and reader 2 uses the second time domain resource.
  • the reader 3 determines the time domain resources of the reader 3 according to the listening results of the readers 1 and 2 and the time domain resources used by the readers 1 and 2. Alternatively, the reader 3 determines the time domain resource of the reader 3 according to the listening results sent by the reader 1 and the reader 2 to the reader 3, and the time domain resources used by the reader 1 and the reader 2. Or, the reader 3 determines according to its own listening results of readers 1 and 2, the listening results sent by reader 1 and reader 2 to reader 3, and the time domain resources used by reader 1 and reader 2. Reader 3's time domain resource. For example, the reader 3 determines that the mutual interference between the reader 3 and the reader 1 is large and cannot occupy the same resources; while the mutual interference between the reader 3 and the reader 2 is small, the same resources can be used.
  • the reader 3 determines to use the second time domain resource. If each time domain resource is limited to be used by at most 2 readers, the second time domain resource has reached the upper limit. Assuming that the reader 4 still needs to determine the resource to communicate with the tag, the reader 4 selects the first and third time domain resources. One of the domain resources. The reader determines the resources to be occupied to communicate with the tag according to the predefined rules through at least one of the received listening results of other readers and the listening results obtained by measuring other reading listening signals, which reduces the cost of communication with the base station. Inter-signaling overhead.
  • the starting position of the resource set (the second resource set) that the readers (eg, readers 1, 2 and 3) communicate with the tag can be determined according to the ending position of the third resource set, such as between the two There is an interval, for example, the end of the third resource set is in time slot n, and the starting position of the second resource set is in time slot n+4. instruct.
  • the reader does not send the listening result, determines the resource to communicate with the tag by itself according to the listening result, and indicates the determined resource to communicate with the tag to other readers.
  • FIG. 8 is based on FIGS. 6 and 7 . Differences from FIGS. 6 and 7 are mainly described below.
  • S601-S603 before S804 are similar to S601-S603 in FIG. 6 .
  • the reader 2 (the second device) receives the first information from the first network device, and the first information instructs the reader 1 to transmit the first resource of the first listening signal and the reader 2 to transmit the first information.
  • the second resource for the second listening signal.
  • the reader 2 sends a second listening signal on the second resource.
  • the reader 2 receives the first listening signal from the reader 1 (the first device) on the first resource.
  • S601-S603 in FIG. 6 which will not be repeated.
  • the reader 1 determines the resource to communicate with the tag.
  • the reader 1 determines the resource of the communication between the reader 1 and the tag according to the listening results of other readers. For example, the reader 1 determines the first interception result according to the second interception signal.
  • the reader 1 sends the second information to other readers.
  • the second information indicates the resource (fifth resource) with which the reader 1 communicates with the tag.
  • the reader 2 determines the resource to communicate with the tag.
  • the reader 2 determines the resources of the reader 2 to communicate with the tag according to the listening results of other readers and the resources that the reader 1 will occupy to communicate with the tag. For example, the reader 2 determines the second interception result according to the first interception signal.
  • the reader 2 receives the second information on the sixth resource.
  • the reader 2 determines the resource (seventh resource) through which the reader 2 communicates with the tag according to the second listening result and the second information.
  • Reader 2 sends information to other readers. This information indicates the seventh resource with which the reader 2 communicates with the tag.
  • S808 The reader 2 communicates with the tag on the seventh resource. This step is similar to S606 in FIG. 6 , see S606 in FIG. 6 , and details are not repeated here.
  • the reader does not send the listening result, but sends information indicating the resource for communication between the reader and the tag, which is beneficial to reduce signaling overhead.
  • the readers send the second information to other readers.
  • the second information indicates the time domain resource determined by the reader to communicate with the tag.
  • the resource for the reader to send the second information may be related to the resource for the reader to send the listening signal; the resource for the reader to send the second information may also be related to the number or identification of the reader.
  • the network device allocates three resources for sending listening signals to three readers (readers 1-3) respectively, and these three resources correspond to the resources for the readers 1-3 to send the second information respectively.
  • the network device allocates resource 1 for sending listening signals to reader 1, resource 2 for sending listening signals to reader 2, and resource 3 for sending listening signals to reader 3.
  • Resource A where reader 1 sends the second information
  • resource B where reader 2 sends second information
  • resource C where reader 3 sends second information
  • the time sequence in which the readers 1-3 send the second information may be the same as the sequence in which the readers 1-3 send the listening signals.
  • the resource for some readers to communicate with the tag has been predetermined, and at this time, the reader may not send the second information. Assume that resource 1 is earlier than resource 2 in time domain, and resource 2 is earlier than resource 3 in time domain. A possible way, reader 1 fixed resource 1 to communicate with the tag, other readers also know that reader 1 occupies resource 1. The reader 1 may not transmit the second information. Reader 2 and Reader 3 need to indicate their respective resources to communicate with the tag.
  • each reader sequentially determines the time domain resources for communicating with the tag in a predefined order, as shown below.
  • the reader 1 predefines the resource A and does not send the second information. For Reader 2, knowing that Reader 1 occupies Resource A, judge whether it can occupy the same Resource A as Reader 1 according to the listening result of Reader 1, and if so, determine that it will occupy Resource A. Otherwise, the reader 2 determines that it will occupy resource B to communicate with the tag. and send the second information to other readers, indicating that it will occupy resource B.
  • Reader 2 indicates to other readers that resource B will be occupied.
  • Reader 3 knowing that Reader 1 occupies resource A, according to the resource B indicated by Reader 2 and the results of its own listening to Reader 1 and Reader 2, determine whether it can occupy resource A, if not. , and then determine whether it can occupy resource B. If not, it will occupy resource C by itself. And indicate to other readers the resources that they will occupy. And so on for other readers.
  • resource A is pre-defined.
  • the candidate resources for reader 2 are resource A and resource B. According to the listening result, if the mutual interference between reader 1 and reader 2 is very small (for example, both are less than a threshold), then reader 2 also occupies resource A. If the mutual interference between Reader 1 and Reader 2 is large, Reader 2 and Reader 1 cannot communicate with the same resource and tag. Then the reader 2 occupies resource B to communicate with the tag. The reader 2 sends a second message, indicating that the reader 2 will occupy the resource B.
  • its candidate resources are resources A, B, and C. At this point, reader 3 knows the resources used by reader 1 and reader 2 to communicate with the tag. For example, Reader 1 uses Resource A and Reader 2 uses Resource B.
  • Reader 3 judges according to its own listening result of reader 1 that the interference with reader 1 is relatively large and cannot occupy the same resources, so reader 3 cannot occupy resource A.
  • the reader 3 receives the second information from the reader 2 and knows that the reader 2 will occupy the resource B.
  • Reader 3 judges according to its own listening result of reader 2, that the influence between reader 3 and reader 2 is small and can occupy the same resources. Therefore, the reader 3 determines to occupy the resource B, and sends the second information of the reader to indicate that it will occupy the resource B.
  • each resource is limited to be used by two readers at most, the usage of resource B has reached the upper limit. It is assumed that the reader 4 can choose between resources A and C if there are more readers 4 to determine which resources to communicate with the tag.
  • the starting position of the third resource set and the manner of determining the starting position of the second resource set are described with reference to FIG. 7 .
  • the reader sends the listening signal and information indicating the resource communicating with the tag in a time domain resource.
  • FIG. 9 is based on FIGS. 7 to 8 .
  • S601 Similar to S601 in FIG. 6 .
  • reader 1 and reader 2 receive first information from the first network device, where the first information indicates the first resource and the second resource. For details, refer to FIG. 6, which will not be repeated.
  • the reader 1 determines the resource to communicate with the tag.
  • the reader 1 determines the resources that the reader 1 communicates with the tag according to predefined rules.
  • the reader 1 sends the first listening signal and the second information of the reading 1 on the first resource, where the second information indicates the resource (the fifth resource) that the reader 1 communicates with the tag.
  • the reader 2 receives the first listening signal and the second information from the reader 1 on the first resource.
  • the reader 2 determines the resource to communicate with the tag.
  • the reader 2 determines the resources of the communication between the reader 2 and the tag according to the listening result of the reader 1 and the communication resources between the reader 1 and the tag. For example, the reader 2 determines the second interception result according to the first interception signal.
  • the reader 2 determines the seventh resource that the reader 2 communicates with the tag according to the second listening result and the second information.
  • S905 The reader 2 sends a second listening signal and information indicating the seventh resource on the second resource.
  • S606 Communicate with the tag. This step is similar to S606 in FIG. 6 and will not be repeated here.
  • the first listening result includes a measurement value of the second listening signal.
  • the measured value is greater than (or greater than or equal to, or less than, or less than or equal to) the first threshold, the fifth resource does not overlap the seventh resource. Otherwise, the fifth resource is the same as the seventh resource. According to the interaction between readers, determining whether to occupy the same resource can improve resource utilization.
  • the reader sends the listening signal and the resource indicating the communication between the reader and the tag through one resource, which can reduce the delay.
  • Figures 10-18 further illustrate Figures 6 to 9 by taking the resources as time domain resources as an example.
  • Figure 10 shows the communication process between the network device, the reader and the tag, taking the resource as the time domain resource as an example.
  • Figure 10 there is one network device and three readers. Figure 10 is divided into 5 stages.
  • Phase 1 The network device schedules the listening signal. That is, the network device sends the first information. This step is similar to S601.
  • Stage 2 The reader sends a listening signal. This step is similar to step S602.
  • Stage 3 The reader sends the listening result. This step is similar to S604. In Figure 10, the result sent by the reader in stage 3 is that readers 1, 2, and 3 send the listening results respectively.
  • Stage 4 The network device schedules the resources for the reader to communicate with the tag. In other words, the network device schedules the communication resources of the RFID. This step is similar to S605.
  • Stage 5 The reader communicates with the tag. This step is similar to S606.
  • reader 1 allocates time domain resources of index 1
  • readers 2 and 3 are allocated time domain resources of index 2.
  • readers 2 and 3 communicate with tags in the same time domain resource. For example, readers 2 and 3 use the time domain resource of index 2 for inventory.
  • FIG. 10 also shows a schematic diagram of the first resource set, a resource unit, the starting position of the first resource in the time domain, and the starting position of the second resource in the time domain.
  • the network device schedules the resources of reader 1, reader 2, reader 3 and tag communication at one time.
  • the network device can also schedule the resources of reader 1, reader 2, and reader 3 to communicate with tags at one time, as shown in Figure 11.
  • FIG. 11 is based on FIG. 10 .
  • Phases 1-4 of the first round in FIG. 11 refer to Phases 1-4 of FIG. 10 .
  • phase 4 of the first round of Figure 11 only schedules reader 1 to communicate with the tag.
  • the network device schedules listening resources, and can schedule readers that were not scheduled in the previous round, such as Reader 2 and Reader 3, and can also schedule new readers that did not participate in the previous round of listening. Reader, such as Reader 4, etc.
  • the network device determines that the interference between Reader 2 and Reader 3 is small according to the received listening result, and schedules Reader 2 and Reader 3 in the same time domain resources Communicate with tags.
  • FIG. 12 is based on FIG. 11 , and phases 1-5 of the first round in FIG. 12 refer to phases 1-5 of the first round of FIG. 10 .
  • the network device informs the readers participating in the listening which reader is scheduled to communicate with the tag, for example, the network device notifies reader 2 and reader 3, and reader 1 is scheduled to communicate with the tag .
  • the network device informs the readers participating in the listening which readers are not scheduled to communicate with the tag.
  • Network devices can be notified by multicast or unicast.
  • the unscheduled readers determine, according to the notification (eg, the second information) of the network device, the total number of time-domain resources for sending the listening signal in the next round and their corresponding time-domain resources for sending the listening signal.
  • Reader 2 and Reader 3 determine that Reader 2 and Reader 3 are not scheduled in the first round according to the notification of the network device.
  • Reader 2 and Reader 3 determine the time domain resources of Reader 2 and Reader 3 for the second round of listening according to a predefined rule.
  • the time domain resources of the second round of listening by the reader 2 and the reader 3 are associated with the time domain resources of the first round of network device scheduling for the reading of the reader 2 and the reader 3.
  • the order in which Reader 2 and Reader 3 send and listen in the second round is the same as that of Reader 2 and Reader 3 in the first round.
  • reader 2 sends a listening signal first, and reader 3 listens for the signal later.
  • Reader 2 and Reader 3 can also be reversed in the order of the second round of interception and the order of Reader 2 and Reader 3 in the first round, that is, the reader that intercepts first in the first round sends out interception after the second round. listen. Refer to FIG. 10 for stages 3-5 of the second round of listening in FIG. 12 , and details are not repeated here.
  • Fig. 13 is based on Fig. 12, in the second round of listening, there is no network device for scheduling, and a new reader 4 can also be added in the second stage to send a listening signal.
  • the listening signal in each round is limited, for example, three at most. And more readers need to communicate with the tag, for example, 5 readers need to communicate with the tag. The numbers of the five readers are respectively 1 to 5, that is, reader 1 to reader 5.
  • the network device allocates listening time domain resources for readers 1 to 3. But in the first round, the network device only schedules reader 1 to communicate with the tag.
  • the number of the reader is associated with the priority of the listening process scheduled by the network device, for example, a reader with a smaller number has a higher priority than a reader with a larger number.
  • readers 2 to 5 all need to listen. However, compared with reader 5, reader 2 to reader 4 have higher priority, so in stage 2 of the second round, reader 2 to reader 4 send listening signals.
  • FIG. 14 shows how to perform interception and subsequent communication when the length of time domain resources for each communication between the reader and the tag is not fixed.
  • FIG. 14 is based on FIG. 12 .
  • phase 6 is introduced, where the reader notifies the network device that the communication with the tag is over. In this case, it is up to the reader to determine when the communication with the tag ends. For example, after the reader 1 searches the tags for one or more times and finds that there is no new tag to report the tag identification, the reader 1 determines that the communication with the tag is over, and notifies the network device reader 1 that the communication with the tag is over.
  • the network device schedules one reader at a time to communicate with the tag. For the first time, the network device schedules reader 1 to communicate with the tag. The second time the network device dispatches the reader 2 to communicate with the tag.
  • FIG. 15 is based on FIG. 14 .
  • the first-round stages 1-6 of FIG. 15 are similar to those of FIG. 14 , and will not be described again.
  • the second round of listening process of Figure 15 has complete stages 1-6.
  • the network device schedules readers 2 and 3 to start communicating with the tag at the same time. After the readers 2 and 3 complete the communication with the tags, they send information to the base station to notify the network equipment that the communication ends.
  • FIG. 16 is based on FIG. 15 .
  • Phases 1-6 of the first round of FIG. 16 are similar to those of FIG. 14 and FIG. 15 and will not be described again.
  • Phase 1A in the second round differs from Phase 1 of FIG. 15 .
  • the network device indicates the starting location of the first set of resources.
  • reader 1 is scheduled to communicate with the tag, and readers 1-3 all send listening signals.
  • Readers 2, 3 are not scheduled in the first round.
  • the size of the time domain resource unit for reading and sending the listening signal is the same as that in the first round.
  • readers 2, 3 obtain the following information; readers 1-3 send listening signals, and reader 1 is scheduled to communicate with the tag.
  • the reader 2-3 knows that the second round of reading 2-3 needs to send a listening signal.
  • the resource for sending the listening signal is determined according to the respective priorities of the readers 2-3. For example, if the reader 2 is higher than the reader 3, the reader 2 occupies the first resource in the first resource set to send the listening signal; the reader 3 occupies the second resource in the first resource set to send the listening signal.
  • Other processes are similar to those in FIG. 15 and will not be repeated here.
  • Deleting stage 4 in Figure 10 to Figure 16 is a schematic diagram for explaining the communication process in Figure 7 (the reader determines the resources to communicate with the tag according to the listening result).
  • stages 1, 2, 3, and 5 are one round of listening process.
  • the first round of listening process includes stages 1, 2, 3, and 5
  • the second round of listening process includes stages 1, 2, 3, and 5.
  • the first round of listening process includes stages 1, 2, 3, and 5; the second round of listening process includes stages 2, 3, and 5.
  • the first round of listening process includes stages 1, 2, 3, and 5; the second round of listening process includes stages 2, 3, and 5.
  • the first round of the listening process includes the first stages 1, 2, 3, 5, and 6, and also includes the second stages 5 and 6.
  • the reader sends the listening result to other readers.
  • the reader determines the resource to communicate with the tag according to the listening result, reference may be made to the description of FIG. 7 .
  • FIG. 17 is a schematic diagram of the communication between the network device, the reader and the tag in the time domain under the situation shown in FIG. 8 .
  • Phase 3 is where the reader indicates the resource to communicate with the tag.
  • readers 1-3 in turn send other readers information indicating the resources they communicate with the tag.
  • reader information indicating the resources they communicate with the tag.
  • FIG. 18 is a schematic diagram of the communication between the network device, the reader and the tag in the time domain under the situation shown in FIG. 9 .
  • Phase 1 of FIG. 18 is similar to Phase 1 of FIG. 17
  • Phase 3 of FIG. 18 is similar to Phase 4 of FIG. 17 , and details are not described again.
  • the Phase 2 reader of Figure 18 transmits a listening signal on a time domain resource and indicates the resource to communicate with the tag.
  • reader 1 sends a listening signal on a time domain resource and information indicating the communication resource between reader 1 and the tag; then, reader 2 sends a listening signal on a time domain resource and instructs reader 2 to communicate with the tag.
  • the time domain resource for sending one listening signal includes A time domain symbols, A>1.
  • the listening signal can be carried using the following format.
  • the first k symbols among the A time-domain symbols are used to transmit the listening signal.
  • One symbol carries one sequence, and the transmission mode of a single symbol can refer to the transmission mode of the Physical Sidelink Feedback Channel (PSFCH) in Section 8.3.4 of 3GPP TS38.211 v16.2.0.
  • the next m symbols are guard symbols (GAP).
  • a time domain resource for sending a listening signal includes 5 time domain symbols, the first 4 symbols are used for transmitting the listening signal, and the last symbol is used as a protection symbol.
  • Format 2 In each of the first k symbols in the A time domain symbols, some RE positions on the frequency domain resources carry a sequence, and the remaining RE positions can be set to transmit all 0-bit information or random bit information, etc.
  • the following m symbols are protected symbols.
  • the time domain resource for sending a listening signal includes a time slot, a time slot has 14 symbols, the first 13 symbols, and one RE in every 4 REs in the frequency domain of a symbol is for listening. signal, the RE frequency domain position of the listening signal on each symbol is the same. There is 1 symbol at the end as a protection symbol.
  • Format 3 The partial symbol bearing sequence of the first k symbols in the A time domain symbols.
  • the sequence may occupy all frequency domain resources allocated in the symbol, or may only occupy part of REs.
  • the REs that do not carry the listening signal in the A symbols can be used to transmit information, and can also be used to transmit all 0-bit information or random bit information.
  • PSSCH Physical Sidelink Shared Channel
  • the following m symbols are protection symbols.
  • the listening signal can be sent repeatedly. Taking format 2 as an example, the listening signal is repeatedly sent once.
  • the time domain resource for transmitting the listening signal includes two time slots, and among the two time slots, the second time slot is a repetition of the first time slot.
  • the listening signal is repeated once in both time slots, but only with GAP in the second time slot.
  • formats 1-3 can also be used to send.
  • the reader's listening results can be sent in the following formats:
  • Format 4 is similar to Format 2, the difference from Format 2 is:
  • REs that do not carry sequences in symbols that are not GAPs do not transmit all 0-bit information or random bit information, but carry useful data.
  • the useful data is the listening result (for coding, modulation, resource mapping, etc., please refer to Section 8.3.2 of 3GPP TS38.211 v16.2.0 and Section 8.3 of TS38.212 v16.2.0 Physical Sidelink Control Channel (Physical Sidelink Control Channel) CHannel, PSCCH) transmission mode);
  • the listening signal in format 2 is in format 4 as DMRS.
  • Format 5 is similar to Format 3, the difference from Format 3 is:
  • REs that do not carry sequences in symbols that are not GAPs do not transmit all 0-bit information or random bit information, but carry useful data.
  • the useful data is the listening result (for coding, modulation, resource mapping, etc., please refer to Section 8.3.1 of 3GPP TS38.211 v16.2.0 and Section 8.2 of TS38.212 v16.2.0 Physical Sidelink Shared Control Channel CHannel, PSSCH) transmission mode);
  • the listening signal in format 3 is in format 5 as DMRS.
  • Formats 6 and 7 may be used for the reader in Figure 18 to send the listening signal and resource information indicating communication with the tag.
  • Format 6 is similar to format 4, and format 7 is similar to format 5, except that the DMRS in format 6 and format 7 also serve as listening signals.
  • Useful data is information indicating the resource communicated with the tag.
  • the first information may be sent by a message or message.
  • the first information may also be sent through multiple signaling or messages. For example, multiple fields of the first information may be sent through multiple signaling.
  • the second information is similar and will not be repeated here.
  • FIG. 19 and FIG. 20 are schematic structural diagrams of possible communication apparatuses provided by embodiments of the present application. These communication apparatuses can implement the functions of the terminal equipment or the network equipment in the above method embodiments, and thus can also achieve the beneficial effects of the above method embodiments.
  • the communication device may be the network device 110 shown in FIG. 2 , the reader 120 shown in FIG. 2 , or a unit (such as a chip) applied to the reader or the network device. ).
  • the communication device 1900 includes a processing unit 1901 , a transceiver unit 1902 and a storage unit 1903 .
  • the communication apparatus 900 may be used to implement the functions of the terminal device or the network device in the method embodiments shown in FIG. 6 to FIG. 16 .
  • the storage unit 1903 stores programs executed by the processing unit 1901 .
  • the transceiver unit 1902 is used for transmitting and receiving signals.
  • the processing unit 1901 is configured to process the signals sent and received by the transceiver unit 1902 and control the transceiver unit 1902 to send and receive signals.
  • the transceiver unit 1902 is used to receive the first information from the first network device, the first information indicating the first resource and the second resource.
  • the transceiver unit 1902 is further configured to send the first listening signal on the first resource, and receive the second listening signal from the second device on the second resource.
  • the processing unit 1901 is configured to determine a first monitoring result according to the second monitoring signal.
  • the transceiver unit 1902 is further configured to send the first listening result on the third resource, and receive the second information on the fourth resource.
  • the processing unit 1901 is further configured to determine the fifth resource according to the second information.
  • the transceiver unit 1902 is configured to communicate with the tag on the fifth resource.
  • the processing unit 1901 is further configured to control the transceiver unit 1902 to communicate with the tag and to transmit and receive signals on the fifth resource.
  • the transceiver unit 1902 is used to send the first information, the first information indicates the first resource and the second resource, and the first resource is used for The first device sends the first listening signal, and the second resource is used for the second device to send the second listening signal.
  • the transceiver unit 1902 is further configured to receive the first monitoring result from the first device on the third resource, and receive the second monitoring result from the second device on the sixth resource.
  • the processing unit 1901 is configured to determine second information according to the first interception result and the second interception result, where the second information indicates a fifth resource for communication between the first device and the tag.
  • the transceiver unit 1902 is further configured to send the second information to the first device on the fourth resource.
  • the processing unit 1901 is also used to control the transceiver unit 1902 and transmit and receive the above-mentioned signals.
  • the transceiver unit 1902 is used to receive the first information from the first network device, the first information indicating the first resource and the second resource.
  • the transceiver unit 1902 is further configured to send a second listening signal on the second resource.
  • the transceiver unit 1902 is further configured to receive the first listening signal from the reader 1 on the first resource.
  • the processing unit 1901 is configured to determine the second monitoring result according to the first monitoring signal.
  • the transceiver unit 1902 is further configured to receive second information on the sixth resource, where the second information indicates the fifth resource through which the reader 1 communicates with the tag.
  • the processing unit 1901 determines the seventh resource to communicate with the tag according to the second listening result and the second information.
  • the transceiver unit 1902 is further configured to send information indicating the seventh resource, and communicate with the tag on the seventh resource.
  • the transceiver unit 1902 is used to receive the first information from the first network device, the first information indicating the first resource and the second resource.
  • the transceiver unit 1902 is further configured to send the first listening signal on the first resource.
  • the transceiver unit 1902 is further configured to receive the first listening signal and the second information from the reader 1 on the first resource, where the second information indicates the fifth resource that the reader 1 communicates with the tag.
  • the processing unit 1901 is configured to determine the second monitoring result according to the first monitoring signal.
  • the processing unit 1901 is further configured to determine the seventh resource to communicate with the tag according to the second listening result and the second information.
  • the transceiver unit 1902 is further configured to send a second listening signal and information indicating the seventh resource on the second resource.
  • the transceiver unit 1902 is further configured to communicate with the tag on the seventh resource.
  • transceiver unit 901 For a more detailed description of the foregoing transceiver unit 901 and the processing unit 902, reference may be made to the relevant descriptions in the foregoing method embodiments, which are not described herein again.
  • the communication apparatus 2000 includes a processor 2002 , a transceiver 2003 , a memory 2001 and a bus 2004 .
  • the transceiver 2003, the processor 2002 and the memory 2001 are connected to each other through a bus 2004; the bus 2004 may be a PCI bus or an EISA bus.
  • the bus can be divided into an address bus, a data bus, a control bus, and the like. For ease of presentation, only one thick line is shown in FIG. 20, but it does not mean that there is only one bus or one type of bus.
  • the memory 2001 stores programs executed by the processor 2002 .
  • the transceiver 2003 is used to transmit and receive signals.
  • the processor 2002 is used for processing signals sent and received by the transceiver 2003 and controlling the transceiver 2003 to send and receive signals.
  • the transceiver 2003 is configured to send information (first information) of the resource instructing the reader to send the listening signal, and receive the listening information sent by the reader. As a result, information (second information) indicating the resource that the reader communicates with the tag is transmitted, and the like.
  • the processor 2002 is configured to determine the resources of the reader to communicate with the tag according to the received listening result of the reader. For details, refer to the embodiments in FIGS. 6-16 , which will not be repeated.
  • the processor 2002 is used to perform the function of the above-mentioned processing unit 1901
  • the transceiver 2003 is used to perform the function of the above-mentioned transceiving unit 1902
  • the memory 2001 is used to perform the function of the above-mentioned storage unit 1903 .
  • the terminal device chip When the above communication device is a chip applied to a terminal device, the terminal device chip implements the functions of the terminal device in the above method embodiments.
  • the terminal device chip receives information from other modules in the terminal device (such as a radio frequency module or an antenna), and the information is sent by the network device to the terminal device; or, the terminal device chip sends information to other modules in the terminal device (such as a radio frequency module or an antenna). antenna) to send information, the information is sent by the terminal equipment to the network equipment.
  • the network device chip When the above communication device is a chip applied to a network device, the network device chip implements the functions of the network device in the above method embodiments.
  • the network device chip receives information from other modules in the network device (such as a radio frequency module or an antenna), and the information is sent by the terminal device to the network device; or, the network device chip sends information to other modules in the network device (such as a radio frequency module or an antenna). antenna) to send information, the information is sent by the network equipment to the terminal equipment.
  • processor in the embodiments of the present application may be a central processing unit (central processing unit, CPU), and may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), application-specific integrated circuits (application specific integrated circuit, ASIC), field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof.
  • CPU central processing unit
  • DSP digital signal processors
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or any conventional processor.
  • the method steps in the embodiments of the present application may be implemented in a hardware manner, or may be implemented in a manner in which a processor executes software instructions.
  • Software instructions can be composed of corresponding software modules, and software modules can be stored in random access memory (RAM), flash memory, read-only memory (ROM), programmable read-only memory (programmable ROM) , PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrically erasable programmable read-only memory (electrically EPROM, EEPROM), registers, hard disks, removable hard disks, CD-ROMs or known in the art in any other form of storage medium.
  • An exemplary storage medium is coupled to the processor, such that the processor can read information from, and write information to, the storage medium.
  • the storage medium can also be an integral part of the processor.
  • the processor and storage medium may reside in an ASIC.
  • the ASIC may be located in the access network equipment or in the terminal equipment.
  • the processor and the storage medium may also exist in the access network device or the terminal device as discrete components.
  • the computer program product includes one or more computer programs or instructions.
  • the computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer program or instructions may be stored in or transmitted over a computer-readable storage medium.
  • the computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server that integrates one or more available media.
  • the usable media can be magnetic media, such as floppy disks, hard disks, magnetic tapes; optical media, such as DVD; and semiconductor media, such as solid state disks (SSD).
  • “at least one” means one or more, and “plurality” means two or more.
  • “And/or”, which describes the relationship of the associated objects, indicates that there can be three kinds of relationships, for example, A and/or B, it can indicate that A exists alone, A and B exist at the same time, and B exists alone, where A, B can be singular or plural.
  • the character "/” generally indicates that the contextual objects are in an “or” relationship. .

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Abstract

一种侦听的通信方法及装置，用以解决不同阅读器（120）使用相同的资源与标签（130）通信时相互干扰的问题。网络设备（110）向阅读器（120）调度阅读器（120）的侦听资源。阅读器（120）根据调度的侦听资源，发送侦听信号，并侦听其他阅读器（120）的侦听信号，获得侦听结果。阅读器（120）发送侦听结果。阅读器（120）接收信息，用于确定与标签（130）通信的资源。阅读器（120）使用通信资源与标签（130）通信。通过网络设备（110）调度侦听资源，可以提高阅读器（120）与标签（130）的通信效率。

Description

一种侦听方法及装置 技术领域
本申请涉及通信技术领域，尤其涉及一种侦听的通信方法及装置.
背景技术
射频识别(Radio Frequency Identification，RFID)技术，是一种非接触式的自动识别技术。阅读器(reader)或读写器通过向低成本的标签(tag)发送激励信号为标签设备进行供电。标签接收阅读器发送的信令，并通过反射(backscatter)信号向阅读器发送信令，如图1所示。通过这种方式阅读器可以识别标签的标识，以及对标签进行读写等操作。多个阅读器使用相同的资源分别与多个标签通信时，有可能导致阅读器之间的强干扰，进而降低通信性能。
发明内容
本申请提供了一种阅读器与标签的通信方法及装置，能够避免互相干扰较大的阅读器在相同的资源与标签通信，进而提高阅读器与标签的通信性能。
第一方面，本申请提供一种通信方法，该方法的执行主体可以是阅读器，也可以是应用于阅读器中的芯片。下面以执行主体是阅读器为例进行描述。阅读器1(第一设备)接收来自于第一网络设备的调度信息(第一信息)。调度信息指示了阅读器1发第一侦听信号的第一资源和阅读器2发第二侦听信号的第二资源。阅读器在第一资源上发第一侦听信号。阅读器1在第二资源上接收来自于阅读器2(第二设备)的第二侦听信号。阅读器1根据第二侦听信号，确定第一侦听结果。阅读器1在第三资源上发送第一侦听结果。阅读器在第四资源上接收第二信息。阅读器1根据第二信息，确定阅读器1与标签通信的第五资源。然后，阅读器1在第五资源上与标签通信。网络设备为阅读器调度侦听资源，使得网络设备(或阅读器)获得不同阅读器相互间的影响，进而网络设备(或阅读器)可以根据阅读器间的相互间影响确定阅读器和标签通信的资源，提升资源利用效率。
第二方面，本申请提供一种通信方法，该方法的执行主体可以是网络设备也可以是应用于网络设备中的芯片。下面以执行主体是网络设备为例进行描述。网络设备发送调度信息(第一信息)。调度信息指示了阅读器1发第一侦听信号的第一资源和阅读器2发第二侦听信号的第二资源。网络设备在第三资源接收来自于阅读器1(第一设备)的第一侦听结果；在第六资源接收来自于阅读器2(第二设备)的第二侦听结果。网络设备根据第一侦听结果和第二侦听结果，确定指示阅读器1与标签通信的第五资源的信息(第二信息)。网络设备在第四资源上向阅读器1发送第二信息。网络设备为阅读器调度侦听资源，使得网络设备(或阅读器)获得不同阅读器相互间的影响，进而网络设备(或阅读器)可以根据阅读器间的相互间影响确定阅读器和标签通信的资源，提升资源利用效率。
第三方面，本申请提供一种通信方法，该方法的执行主体可以是阅读器，也可以是应用于阅读器中的芯片。下面以执行主体是阅读器为例进行描述。阅读器2(第二设备)接收来自于第一网络设备的第一信息，第一信息指示阅读器1发第一侦听信号的第一资源和阅读器2发第二侦听信号的第二资源。阅读器2在第二资源上发送第二侦听信号。阅读器2在第一资源上接收来自于阅读器1(第一设备)的第一侦听信号。阅读器2根据第一侦听信号，确定第二侦听结果。阅读器2在第六资源上接收第二信息，该第二信息指示阅读器1与标签通信的第五资源。阅读器2根据第二侦听结果和第二信息，确定阅读器2与标签通信的第七资源。并发送指示第七资源的信息。阅读器2在第七资源上与标签通信。阅读器不发送侦听结果，而发送指示该阅读器与标签通信的资源的信息，有利于降低信令开销。
第四方面，本申请提供一种通信方法，该方法的执行主体可以是阅读器，也可以是应用于阅读器中的芯片。下面以执行主体是阅读器为例进行描述。阅读器2接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。阅读器2在第一资源上接收来自于阅读器1的第一侦听信号和第二信息，该第二信息指示阅读器1与标签通信的第五资源。阅读器2根据第一侦听信号，确定第二侦听结果。阅读器2根据第二侦听结果和第二信息，确定阅读器2与标签通信的第七资源。阅读器2在第二资源上发送第二侦听信号和指示第七资源的信息。阅读器2在第七资源上与标签通信。阅读器将侦听信号和指示阅读器与标签通信的资源通过一个资源发送，可以降低时延。
在第一方面至第四方面，一个可能的设计中，阅读器1以如下的方式发送第一侦听结果。
阅读器1向第一网络设备发送第一侦听结果或者阅读器1(第一设备)向所述阅读器2(第二设备)发送第一侦听结果。在阅读器1向第一网络设备发送第一侦听结果的情况下，阅读器1接收来自于第一网络设备的第二信息。网络设备通过接收阅读器发送的侦听结果，网络设备可以调度各个阅读器与标签通信的资源，提高阅读器与标签通信的性能。在阅读器1向阅读器2发送第一侦听结果的情况下，阅读器1接收来自于阅读器2的第二信息，第二信息包括阅读器2的第二侦听结果。阅读器1根据第二侦听结果和第一侦听结果，确定所述第五资源。阅读器将侦听结果发送给其它阅读器。阅读器通过接收到的其它阅读器的侦听结果，根据预定义规则确定各自要占用的与标签通信的资源，降低了与基站之间信令开销。
在第一方面至第四方面，一个可能的设计中，阅读器1发第一侦听结果的资源(第三资源)关联于阅读器1发侦听信号的资源(第一资源)。阅读器发送侦听结果的资源与之前发送侦听信号的资源之间有关联关系，可以节省了网络设备的开销。
在第一方面至第四方面，一个可能的设计中，阅读器1收第二信息的资源(第四资源)关联于阅读器1收第二侦听信号的资源(第二资源)。阅读器收第二信息的资源与之前接收侦听信号的资源之间有关联关系，可以节省了网络设备的开销。
在第一方面至第四方面，一个可能的设计中，侦听结果包括阅读器1对第二侦听信号的测量值。或者，侦听结果包括阅读器1对第二侦听信号的测量值与门限的比较结果。阅读器发送测量值，接收侧可以获得更多信息，有利于接收侧确定阅读器与标签通信的资源。阅读器发送测量值与门限的比较结果，可以节省发送测量值的开销。
在第一方面至第四方面，一个可能的设计中，第一资源，第二资源，第三资源，第四资源和第五资源为时域资源。
在第一方面至第四方面，一个可能的设计中，第一信息指示如下参数的至少一个：
第一资源集合的起始位置，第一资源集合包括第一资源和所述第二资源，
第一资源集合包括的资源单元的数目，
第一资源在第一资源集合的索引，
第二资源在第一资源集合的索引。
在第一方面至第四方面，一个可能的设计中，第五资源属于第二资源集合。所述第二信息指示如下参数的至少一个：
所述第二资源集合的起始位置，
所述第二资源集合包括的资源单元的数目，
所述第五资源在第二资源集合中的索引。
在第一方面至第四方面，一个可能的设计中，侦听信号是参考信号。
在第一方面和第二方面，一个可能的设计中，第二信息指示一个或多个被调度的与标签通信的设备的标识(阅读器的标识)。被调度的阅读器和未被调度的阅读器可以知道哪个阅读器被调度。未被调度的阅读器可以在随后的侦听过程确定是否发送侦听信号，以及发送侦听信号的资源，而不需要基站调度发送侦听信号的资源，节省了基站与阅读器的信令开销和调度的时延。
在第一方面至第四方面，一个可能的设计中，第一信息承载在以下至少一个信令中：
单播信令，多播信令和广播信令。
第二信息承载在以下至少一个信令中：
单播信令，多播信令和广播信令。也就是说，第一信息，第二信息可以通过单播，多播或广播的方式发送。也可以通过单播，多播或广播的任意组合的方式发送。
在第四方面，在一个可能的设计中，第一侦听结果包括对所述第二侦听信号的测量值。当该测量值大于等于第一阈值时，第五资源与所述第七资源不重叠。当该测量值小于第一阈值时，第五资源与所述第七资源相同。根据阅读器之间的相互影响，确定是否占用相同的资源可以提升资源利用率。
第五方面，提供一种通信装置，该通信装置具有实现上述第一方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述通信装置包括收发单元，用于接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。收发单元还用于在第一资源上发送第一侦听信号，在第二资源上接收来自于第二设备的第二侦听信号。所述通信装置还包括处理单元，用于根据所述 第二侦听信号，确定第一侦听结果。收发单元还用于在第三资源上发送第一侦听结果，在第四资源上接收第二信息。处理单元还用于根据第二信息，确定第五资源。收发单元还用于在所述第五资源上与标签通信。这些单元可以执行上述第一方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第六方面，提供一种通信装置，所述通信装置具有实现上述第二方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述通信装置包括收发单元，发送第一信息，第一信息指示第一资源和第二资源，第一资源用于第一设备发送第一侦听信号，第二资源用于第二设备发送第二侦听信号。收发单元还用于在第三资源接收来自于第一设备的第一侦听结果，在第六资源接收来自于第二设备的第二侦听结果。所述通信装置还包括处理单元，用于根据所述第一侦听结果和所述第二侦听结果，确定第二信息，第二信息指示第一设备与标签通信的第五资源。收发单元还用于在第四资源上向所述第一设备发送第二信息。这些单元可以执行上述第二方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第七方面，提供一种通信装置，该通信装置具有实现上述第三方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述通信装置包括收发单元，用于接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。收发单元还用于在第二资源上发送第二侦听信号，在第一资源上接收来自于阅读器1(第一设备)的第一侦听信号。该通信装置还包括处理单元，用于根据第一侦听信号，确定第二侦听结果。收发单元还用于在第六资源上接收第二信息，该第二信息指示阅读器1与标签通信的第五资源。处理单元还用于根据第二侦听结果和第二信息，确定第七资源。收发单元还用于发送指示第七资源的信息。收发单元还用于在第七资源上与标签通信。这些单元可以执行上述第三方面方法示例中的相应功能，具体参见方法示例中的详细描述，此处不做赘述。
第八方面，提供一种通信装置，该通信装置具有实现上述第四方面的方法实例中行为的功能。所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的模块。在一个可能的设计中，所述通信装置包括收发单元，用于接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。收发单元还用于在第一资源上接收来自于阅读器1的第一侦听信号和第二信息，该第二信息指示阅读器1与标签通信的第五资源。该通信装置还包括处理单元，用于根据第一侦听信号，确定第二侦听结果。处理单元还用于根据第二侦听结果和第二信息，确定第七资源。收发单元还用于在第二资源上发送第二侦听信号和指示第七资源的信息。收发单元还用于在第七资源上与标签通信。
第九方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的阅读器，或者为设置在阅读器中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使阅读器执行上述方法实施例中由阅读器所执行的方法。
第十方面，提供了一种通信装置，该通信装置可以为上述方法实施例中的网络设备，或者为设置在网络设备中的芯片。该通信装置包括通信接口以及处理器，可选的，还包括存储器。其中，该存储器用于存储计算机程序或指令，处理器与存储器、通信接口耦合，当处理器执行所述计算机程序或指令时，使通信装置执行上述方法实施例中由网络设备所执行的方法。
第十一方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码并运行时，使得上述各方面中由阅读器执行的方法被执行。
第十二方面，提供了一种计算机程序产品，所述计算机程序产品包括：计算机程序代码，当所述计算机程序代码被运行时，使得上述各方面中由网络设备执行的方法被执行。
第十三方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于实现上述各方面的方法中阅读器的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十四方面，本申请提供了一种芯片系统，该芯片系统包括处理器，用于实现上述各方面的方法中网络设备的功能。在一种可能的设计中，所述芯片系统还包括存储器，用于保存程序指令和/或数据。该芯片系统，可以由芯片构成，也可以包括芯片和其他分立器件。
第十五方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述各方面中由阅读器执行的方法。
第十六方面，本申请提供了一种计算机可读存储介质，该计算机可读存储介质存储有计算机程序，当该计算机程序被运行时，实现上述各方面中由网络设备执行的方法。
第十七方面，本申请提供了一种通信系统，该通信系统包括网络设备和阅读器。网络设备实现上述各方面中由网络设备执行的方法。阅读器实现上述各方面中由阅读器执行的方法。
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图1为本申请实施例中一种可能的阅读器与标签通信的示意图；
图2为本申请实施例中一种可能的通信架构示意图；
图3为本申请实施例两个阅读器与标签通信互相干扰的示意图；
图4为本申请实施例两个阅读器通过时分复用与标签通信的示意图；
图5为本申请实施例两个阅读器在同样的时域单元与标签通信的示意图；
图6为本申请实施例一种侦听方法的示意图；
图7为本申请实施例另一种侦听方法的示意图；
图8为本申请实施例又一种侦听方法的示意图；
图9为本申请实施例又一种侦听方法的示意图；
图10为本申请实施例又一种侦听方法的示意图；
图11为本申请实施例又一种侦听方法的示意图；
图12为本申请实施例又一种侦听方法的示意图；
图13为本申请实施例又一种侦听方法的示意图；
图14为本申请实施例又一种侦听方法的示意图；
图15为本申请实施例又一种侦听方法的示意图；
图16为本申请实施例又一种侦听方法的示意图；
图17为本申请实施例又一种侦听方法的示意图；
图18为本申请实施例又一种侦听方法的示意图；
图19为本申请实施例通信装置1900的示意图；
图20为本申请实施例通信装置2000的示意图。
具体实施方式
为了便于理解，示例地给出了部分与本申请相关概念的说明以供参考。如下所示：
A接收来自于B的信息：A可以直接接收B发送给A的信息。A也可以通过中间设备C接收B发送的信息。也就是说，B将信息发给了C，C将该信息发给A。
单播：指发送端(如网络设备)到接收端(如阅读器)之间点到点的通信。例如，网络设备发送的信息的目的地为某一个阅读器，而非其它阅读器。
多播：或组播，指发送端(如网络设备)到多个接收端(如阅读器)之间一对多的通信。例如，网络设备发送的信息的目的地为多个或一组阅读器。
广播：指发送端(如网络设备)与当前属于该发送端的所有接收端(如阅读器)之间的一对多的通信。例如，网络设备发送的信息的目的地当前属于该网络设备的所有阅读器。
时频资源：时频资源被划分成时间维度上的正交频分复用(Orthogonal Frequency Division Multiplexing Access，OFDM)或单载波频分复用多址(Single Carrier–Frequency Division Multiplexing Access，SC-FDMA)符号，和频率域维度上的子载波，它们组成了时频资源网格。在该网格中最小的资源粒度称为一个资源单位(Resource Element，RE)，表示时间域上的一个时域符号和频率域上的一个子载波组成的时频格点。子载波间隔为15KHz，30KHz，60KHz等。物理资源块(Physical Resource Block，PRB)为频域资源调度的基本单位，一个物理资源块中固定包含12个频域子载波；时隙(slot)为时域资源基本单位之一，一个时隙一般包含14个时域符号，或者一个时隙一般包含7个时域符号。子帧也为时域资源基本单位之一，固定为1毫秒。对于15KHz的子载波间隔， 每1子帧中包含14个时域符号。
参考信号：参考信号可以是收发方都已知的序列。参考信号用于接收侧解调数据(如解调参考信号(Demodulation Reference Signal，DMRS)、小区参考信号(Cell-specific Reference Signal,CRS)等)，或者接收侧进行测量(如信道探测参考信号(Sounding Reference Signal，SRS)、信道状态信息参考信号(Channel State Information Reference Signal,CSI-RS)等。
解调参考信号：插入在数据信道或控制信道中一起传输的信号，主要用于接收侧对物理信道状况进行估计，进而对传输信息进行解调。
时域资源单元：一个时域资源单元可以是一个或多个子帧，可以是一个或多个时隙，也可以是一个或多个时域符号。
频域资源单元：一个频域资源单元可以是一个或多个PRB。一个频域资源单元也可以是一个或多个RE。
资源单元：由一个时域资源单元和一个频域资源单元组成。
指示：A指示B，可以是显式指示，也是可以是隐式指示。
显式指示：A对B进行直接指示，即A直接指示出B的信息。
隐式指示：A对B进行间接指示，即A并未直接指示出B的信息，而是指示的其它信息，但通过其它信息可以确定出B。
反射：也被称为背向散射，或者反向散射(backscatter)
网络设备:网络设备可以是接入网设备，接入网设备也可以称为无线接入网(radio access network，RAN)设备，是一种为终端设备提供无线通信功能的设备。接入网设备例如包括但不限于：5G中的下一代基站(generation nodeB，gNB)、演进型节点B(evolved node B，eNB)、基带单元(baseband unit，BBU)、收发点(transmitting and receiving point，TRP)、发射点(transmitting point，TP)、未来移动通信系统中的基站或WiFi系统中的接入点等。接入网设备还可以是云无线接入网络(cloud radio access network，CRAN)场景下的无线控制器、集中单元(centralized unit，CU)，和/或分布单元(distributed unit,DU)，或者网络设备可以为中继站、车载设备以及未来演进的网络中的网络设备等。终端设备：终端设备可以简称为终端，也称为用户设备(user equipment，UE)，是一种具有无线收发功能的设备。终端设备可以部署在陆地上，包括室内或室外、手持或车载；也可以部署在水面上(如轮船等)；还可以部署在空中(例如飞机、无人机、气球和卫星上等)。所述终端设备可以是手机、平板电脑、带无线收发功能的电脑、虚拟现实终端设备、增强现实终端设备、工业控制中的无线终端设备、无人驾驶中的无线终端设备、远程医疗中的无线终端设备、智能电网中的无线终端设备、运输安全中的无线终端设备、智慧城市中的无线终端设备、智慧家庭中的无线终端设备。终端设备也可以是固定的或者移动的。
阅读器：阅读器是与标签进行通信的设备，向标签发送激励信号，和/或向标签发送/从标签接收RFID信令。阅读器可以是网络设备，也可以是终端设备。
RFID：是一种非接触式的自动识别技术，其基本原理是利用射频信号的空间耦合或雷达反射的传输特性，实现对被识别物体的自动识别。阅读器通过天线与RFID电子标签进行无线通信，可以实现对标签识别码和内存数据的读出或写入操作。标签接收阅读器发送的信号，用于驱动内部的电路进行编码、解码、调制、解调等操作处理，并反射阅读器发送的信号，将要传输的信息调制在反射信号上，以向阅读器发送信令。标签可以分为无源、有源、半无源(或半有源)标签。无源标签无电源，内部处理及反射信号依赖阅读器的激励信号；有源标签内部有电源，内部处理及反射信号可以不依赖于阅读器的激励信号；而半无源标签内部有电源，内部处理及反射信号可以利用电源和阅读器的激励信号。
盘存：阅读器与覆盖范围内的标签进行RFID通信，获取标签的标识(Identificat ion，ID)，获知覆盖范围内有哪些标签(标签附着在货物上)，进而可以实现在商店、仓库等场景下对于货物进行清点(盘货)。
如图2所示，为本申请实施例适用的一种可能的网络架构示意图，包括网络设备110；包括阅读器120，阅读器120包括阅读器1和2；包括标签130，标签130包括标签1和2。阅读器120标签的通信分为前向链路和反向链路。阅读器120向标签发数据的链路是前向链路；阅读器120从标签接收数据的链路是反向链路。
阅读器120可通过无线的方式与标签130相连，阅读器120可通过有线或无线的方式与网络设备110相连。
需要说明的是，在图2所示的网络架构中，标签120可以是固定位置的，也可以是可移动的，不作限定。图2所示的网络架构中，还可包括其它网络设备，比如无线中继设备和无线回传设备等，不作限定。图2所示的架构中，对网络设备、阅读器和标签的数量不作限定。
本申请实施例中的技术方案，可应用于各种通信系统。比如，长期演进(long term evolution，LTE)系统、第五代(5th generation，5G)移动通信系统以及未来的移动通信系统等。
如图3所示，阅读器1与标签1进行RFID通信，阅读器2与标签2进行RFID通信。阅读器1和阅读器2之间各自独立与标签1，2分别通信，且无协同。阅读器1和阅读器2同时发送信号。阅读器1和2距离较近，同时发送给对方造成较大干扰，影响正常RFID通信，降低阅读器的覆盖范围。
当网络设备协调多个阅读器与标签之间的RFID通信时，阅读器何时与标签进行RFID通信由网络设备调度。如图4所示，为避免阅读器之间的干扰，网络设备调度阅读器之间时分复用。图4给出了网络设备调度阅读器的结果。在图4中，网络设备调度阅读器1先和标签进行RFID通信，然后调度阅读器2在此之后与标签进行RFID通信。网络设备调度阅读器间完全时分复用，能避免阅读器之间的干扰，但是某些阅读器之间可以同时发送信号而不会造成干扰的，这就会造成时域资源利用的不充分，降低了阅读器与标签之间的通信效率。
为更充分利用时域资源，网络设备调度阅读器之间同时发送(或者发送时间可重叠等)。如图5所示，网络设备调度阅读器1和阅读器2同时发送。在这种情况下， 网络设备不能准确知道哪些阅读器之间可以同时发送信号，故网络设备调度同时发送的多个阅读器间有可能会造成相互间较大的干扰。
在以下的实施例中，资源可以是时域资源，频域资源，码域资源或空域资源等资源。资源也可以是时域资源，频域资源，码域资源或空域资源之间的任意组合。例如，资源是时频资源，或资源是时频资源和码域资源。
基于图2提供的网络架构，下面对阅读器与标签的通信场景进行描述。该应用场景中的网络设备可为图2中的网络设备110，阅读器可为图2中的阅读器120，标签可为图2中的标签130。图6给出了阅读器与标签通信的示意图。在图6中，阅读器1可为第一设备；阅读器2可为第二设备。图6中的标签为多个。阅读器1和2与标签通信通常表示阅读器1和2分别与不同的标签通信。例如，阅读器1与标签1通信；阅读器2与标签2通信。图6中的阅读器也不限于2个，还可有阅读器3、4等。如图6所示，通信过程可包括：
S601:网络设备向阅读器发送第一信息。
S602：阅读器发侦听(sensing)信号，并且接收其他阅读器的侦听信号。
S603：阅读器根据接收的侦听信号，确定侦听结果。阅读器对其它阅读器发送的侦听信号进行测量，如可以测量该信号的参考信号接收功率(reference signal received power，RSRP)、接收信号强度指示(received signal strength indicator，RSSI)，信干噪比(signal to interference plus noise ratio，SINR)等。例如，阅读器1和2分别测量对方的侦听信号，并得到各自的侦听结果。侦听结果可以包括上述侦听信号的测量值。侦听结果也可以包括测量值与门限的比较结果。如测量值大于(或大于等于，或小于，或小于等于)预设门限值，则比较结果置为1(或0)，否则置为0(或1)。侦听结果也可以包括多个时域资源单元的比较结果，例如通过位图(bitmap)的方式指示。
S604：阅读器发送侦听结果。
S605：网络设备给阅读器发送第二信息。第二信息指示阅读器和标签的通信资源。
S606：阅读器和标签通信。
网络设备为阅读器调度侦听资源，使得网络设备获得不同阅读器相互间的影响，进而网络设备可以根据阅读器间的相互间影响确定阅读器和标签通信的资源，提升资源利用效率。
以下，对步骤S601-S606做进一步说明。
在图6中的S601中，网络设备向阅读器1，阅读器2发送第一信息。即，阅读器接收来自于网络设备的第一信息。
一种可能的方式，第一信息指示如下参数的至少一个：
第一资源集合的起始位置，第一资源集合包括第一资源和所述第二资源；
第一资源集合中包括的资源单元的数目；
第一资源在第一资源集合的索引；
第二资源在第一资源集合的索引。第一资源集合是阅读器用于发送侦听信号的资 源集合。
第一信息用于调度侦听信号。第一信息指示第一资源和第二资源。。第一资源用于阅读器1发送第一侦听信号，第二资源用于阅读器2发送第二侦听信号。
网络设备可以通过组播或广播的方式，向阅读器(如阅读器1，2)发送第一消息。网络设备也可以通过单播的方式，向多个阅读器(如阅读器1，2)分别发送第一信息。
在一种可能的方式中，网络设备通过单播的方式，向阅读器分别发送第一信息。第一信息指示侦听资源集合(第一资源集合)中资源单元的数目，侦听资源集合的起始位置，该阅读器的发送侦听信号的资源单元在侦听资源集合中的索引。例如，基站给阅读器1发送的第一信息，指示了侦听资源集合的起始位置、一共分配了3个单元(unit)侦听资源(资源集合中资源单元的数目为3)，以及给阅读器1分配了索引为1的资源单元(阅读器的发送侦听信号的资源单元在侦听资源集合中的索引为1)。基站给阅读器2发送的第一信息，指示了侦听资源集合的起始位置、一共分配了3个资源单元，以及给阅读器2分配了索引为2的资源单元。基站给阅读器3发送的第一信息(图6中没有画出)，指示了侦听资源集合的起始位置、一共分配了3个资源单元，以及给阅读器3分配索引为3的资源。
以资源为时域资源为例。例如，网络设备通过第一信息通知阅读器1～3第一资源集合的起始位置。例如，该第一信息指示第一信息所在时域位置和第一资源集合起始位置之间的偏移量。以一个时域资源单元为时隙(slot)为例，网络设备在第k个时隙发第一消息。网络设备通过信令通知阅读器1～3第一资源集合(侦听信号的资源集合)的起始位置是第k+4时隙。可选地，可以通过预定义的方式定义第一信息所在的时域位置和第一资源集合起始位置之间的偏移量。例如，网络设备在第k个时隙发第一消息，预定义k+3时隙是第一资源集合的起始位置。
阅读器1～3接收到相应的第一信息后，根据侦听资源集合的起始位置可以知道侦听资源从哪里开始，根据侦听资源集合中资源单元的总数可以知道各个侦听资源的位置(假设每个侦听资源的结构、大小等固定)，根据资源单元索引可以知道分配给自己的资源的位置，进而可以知道分配给其它阅读器的资源的位置。以阅读器1为例，阅读器1收到给阅读器1的第一消息，指示出侦听资源集合的起始位置，和侦听资源集合的单元数目为3。且索引为1的资源单元是阅读器1发送侦听信号的资源。阅读器1可以得到，索引为2,3的资源单元是其他阅读器发侦听信号的资源。阅读器1在索引为2,3的资源单元上测量其他阅读器发的侦听信号。
在一种可能的方式中，网络设备通过组播/广播的方式，发送第一信息。第一信息指示侦听资源集合的起始位置，多个阅读器的发送侦听信号的资源单元在侦听资源集合中各自的索引。例如，第一信息指示了侦听资源集合的起始位置，给阅读器1发送的侦听信号分配了索引为1的资源，给阅读器2分配了索引为2的资源，给阅读器3分配了索引为3的资源。阅读器接收到该控制信息后，根据侦听资源集合的起始位置可以知道资源从哪里开始，根据各个资源单元索引可以知道分配给自己的以及分配给其它阅读器的资源的位置。
一种可能的方式中，侦听资源集合的起始位置(假设为时域起始位置)与第一信息结束位置之间的时域关系是固定的，如第一信息结束于第n时隙，则侦听资源集合 从第n+4时隙开始。资源集合中固定包括3个资源单元，每个资源单元(或每个资源)大小固定(如均为1个时隙)。则侦听资源集合的起始位置、资源集合中资源单元的数目和每个资源单元的大小，不需要通过第一信息的内容来指示。发送给阅读器1的第一信息中，指示阅读器1在资源集合中分配的资源索引。在第一资源和第二资源的大小为固定值的情况下，如固定为1个时隙，则无需额外指示。但如第一资源和第二资源的大小可以有多种取值集合，则可以通过第一信息指示第一资源和第二资源的大小。例如，第一资源和第二资源大小可以为7符号，1个时隙或2个时隙。通过第一信息可以指示第一资源和第二资源大小。
以资源为时域资源为例，表1给出了网络设备给不同的阅读器分配的资源。
表1阅读器分配的侦听时域资源
时域索引 阅读器
1 1
2 2
3 3
以资源为时频资源为例，时域有3个单元的时域资源，频域有2个单元的频域资源，一个时域资源单元和一个频域资源单元构成一个资源单元，一共有6个资源单元。在一个示例中，2个频域资源单元的索引按频率从小到大索引，即频率低的频域资源单元的索引小；3个时域资源单元按时域位置从小到大索引。假设资源单元的索引与时域索引和频域索引的预定义关系为：按照先频域后时域从小到大的顺序对资源单元进行索引，如表2所示。
表2阅读器分配的侦听时频资源
资源索引 时域索引 频域索引 阅读器
1 1 1 1
2 1 2 2
3 2 1 2
4 2 2 3
5 3 1 3
6 3 2 1
以单播方式为例，网络设备给阅读器1发送的第一信息，指示了侦听时域资源的起始位置、一共分配了3个时域侦听资源单元，分配的2个频域资源单元的位置，以及给阅读器1分配了资源索引为1，6的时频资源用于发侦听信号。给阅读器2发送的第一信息，指示了侦听时域资源的起始位置、一共分配了3个时域侦听资源单元，分配的2个频域资源单元的位置，以及给阅读器2分配了资源索引为2，3时频资源用于发侦听信号。给阅读器3发送的第一信息，指示了侦听时域资源的起始位置、一共分配了3个时域侦听资源单元，分配的2个频域资源单元的位置，以及给阅读器2分配了资源索引为4，5时频资源用于发侦听信号。
在S602中，以表1为例，各阅读器在各自分配的时域资源上分别发送各自的侦听 信号。例如，阅读器1在第一资源(时域资源索引为1的资源单元)上发送第一侦听信号。
在S603中，以阅读器1为例。阅读器1接收来自于阅读器2的侦听信号(第二侦听信号)，根据第二侦听信号，确定第一侦听结果。例如，第一侦听结果包括阅读器1测量的收到的阅读器2的侦听信号的RSRP等。
在S604中，阅读器向网络设备发送侦听结果。在图6中，阅读器1和2分别向网络设备发送侦听结果。例如，阅读器1在第三资源上发送第一侦听结果。阅读器发送测量值，接收侧可以获得较多信息，有利于接收侧确定阅读器与标签通信的资源。阅读器发送测量值与门限的比较结果，可以节省发送侦听结果的开销。
在S605中，网络设备给阅读器发送第二信息。第二信息指示阅读器和标签的通信资源(第五资源)。例如，网络设备根据收到的侦听结果，确定各个阅读器与标签通信的资源，并把确定的资源分别发给阅读器。一种可能的方式，网络设备根据各阅读器的侦听结果，以及各阅读器的优先级，按照从高到低的顺序，依次确定各阅读器的资源，如优先级最高的阅读器分配第一个资源，然后判断优先级第二的阅读器是否可以和优先级最高的阅读器分配相同资源，如可以则优先级第二的阅读器也分配第一个资源，如不可以则优先级第二的阅读器分配第二个资源，以下以此类推，不再赘述。另一种可能的方式，网络设备遍历各种资源分配的方式，从中选出占用资源总数最少的方式，作为最终资源分配的结果。在图6中，网络设备根据阅读器1和阅读器2的侦听结果，确定阅读器1和阅读器2和标签的通信的资源。例如，网络设备确定阅读器1和标签通信的时域资源1，阅读器2和标签通信的时域资源2。网络设备将指示时域资源1的第二信息通过第四资源发给阅读器1。相应地，阅读器1在第四资源上接收第二信息。网络设备将指示时域资源2的第二信息发给阅读器2。网络设备通过接收阅读器发送的侦听结果，网络设备可以调度各个阅读器与标签通信的资源(第五资源)，提高阅读器与标签通信的性能。
在一个示例中，第二信息指示如下参数的至少一个：
第二资源集合的起始位置，
第二资源集合包括的资源单元的数目，
阅读器与标签通信的资源在第二资源集合的索引。
第五资源是阅读器和标签通信的资源。第五资源属于第二资源集合。阅读器与标签通信的资源在第二资源集合的索引可以为多个。比如阅读器1与标签通信的资源(第五资源)在第二资源集合的索引1，阅读器2与标签通信的资源在第二资源集合的索引2。
在一个示例中，网络设备通过单播的方式，对各个被调度的阅读器分别发送第二信息。一种可能的方式，网络设备给阅读器1发送的第二信息，指示了阅读器与标签的通信的第二资源集合的起始位置、第二资源集合包括2个资源单元，以及给阅读器1分配了索引1的资源单元。基站给阅读器2发送的第二信息，指示了阅读器与标签的通信的第二资源集合的起始位置、第二资源集合包括2个资源单元，以及给阅读器2分配了索引2的资源单元。基站给阅读器3发送的第二信息，指示了阅读器与标签的通信的第二资源集合的起始位置、第二资源集合包括2个资源单元，以及给阅读器 3分配了索引2的资源单元。
在一个示例中，网络设备通过组播或广播的方式，向阅读器发送第二信息，指示阅读器与标签的通信资源。例如，网络设备给阅读器1～3组播或广播了第二信息，指示阅读器与标签的通信的第二资源集合的起始位置、第二资源集合包括2个资源单元，以及给阅读器1分配了索引1的资源单元，给阅读器2和3分配了索引2的资源单元。
在一个示例中，第二资源集合的起始位置与第二信息结束位置之间的时域关系是固定的，如第二信息结束于第n时隙，则第二资源集合从第n+4时隙开始。第二资源集合中固定包括2个资源单元，每个资源单元(或每个资源)大小固定(如均为2s)。则第二信息指示给调度的阅读器在第二资源集合中分配的资源索引，无需指示第二资源集合的起始位置和第二资源集合包括的资源单元的数目。
在S606，阅读器(例如阅读器1)根据收到的第二信息，确定第五资源，使用第五资源和标签通信。阅读器和标签的通信可以是盘存(inventory)通信。可选地，可能还包括阅读器对标签的其它操作，如读写内存等。
第一信息，第二信息可以为物理层控制信息，如下行控制信息(downlink control information,DCI)；第一信息，第二信息可以为媒体接入控制(medium access control，MAC)信息，如MAC控制单元(control element,CE)；第一信息，第二信息可以为无线资源控制(radio resource control，RRC)信息，如RRC专用或公共信令，或某个RRC专用或公共信令中的字段等。第一信息可以通过一条或多条信令发送。例如，对分配给阅读器的资源索引通过单播的方式来通知(如通过DCI)；而第一资源集合的起始位置、资源总数等可以通过组播或广播的方式通知(如通过RRC公共信令)。第二信息也可以通过一条或多条信令发送。例如，对分配给阅读器的与标签通信的资源索引通过单播的方式来通知(如通过DCI)；而第二资源集合的起始位置、资源总数等可以通过组播或广播的方式通知(如通过RRC公共信令)。也就是说，第一信息承载在以下至少一个信令中：单播信令，多播信令和广播信令。第二信息承载在以下至少一个信令中：单播信令，多播信令和广播信令。
在一个示例中，第一资源，第二资源，第三资源，第四域资源，第五资源为时域资源。
在一种可能的方式中，阅读器根据侦听结果自己确定与标签通信的资源。如图7所示，图7基于图6。以下主要描述与图6的不同之处。
S704之前的S601-S603和图6的S601-S603类似。参见图6的S601-S603,不再赘述。
S704：阅读器发送侦听结果。与图6不同在于，图6是阅读器向基站发送侦听结果。在图7中，阅读器向其他阅读器发送侦听结果。例如，阅读器1在第三资源上向阅读器2发送第一侦听结果。第一侦听结果包括阅读器1测量的收到的阅读器2的侦听信号的RSRP等。同理，阅读器2向阅读器1发送阅读器2的第二侦听结果。也就是说，阅读器1接收来自于阅读器2的第二信息，该第二信息包括阅读2的第二侦听结果。
S705：阅读器确定与标签通信的资源。
S606：与标签通信。此步骤与图6的S606类似，不再赘述。
以下对S704，和S705做进一步说明。
在S704中，阅读器将自己对其它阅读器的侦听结果发送给其它阅读器，并接收其它阅读器发送的侦听结果。如图7所示，阅读器1把对阅读器2的侦听结果发给阅读器2，反之亦然。阅读器通过接收到的其它阅读器的侦听结果，根据预定义规则确定各自要占用的与标签通信的资源，避免了与基站之间通信的信令及调度开销。
阅读器发侦听结果的资源(第三资源)可以关联于阅读器发送侦听信号的资源(第一资源)。例如，网络设备为3个阅读器分配了发送侦听信号的资源。网络设备为阅读器1分配了发侦听信号的资源1，为阅读器2分配了发侦听信号的资源2，为阅读器3分配发侦听信号的资源3。阅读器1发侦听结果的资源A关联于资源1；阅读器2发侦听结果的资源B关联于资源2；阅读器3发侦听结果的资源C关联于资源3。例如，阅读器发侦听结果的顺序和阅读器发送侦听信号的顺序相同。和阅读器2比，阅读器1先发的侦听信号，先发侦听结果。阅读器发侦听结果的资源也可以关联于阅读器的编号或标识。
一种可能的方式，某些阅读器与标签通信的资源已经预先被确定，此时，该阅读器可以不发送侦听结果。此时，发侦听结果的阅读器数量和发侦听信号的阅读器数量不同。例如，阅读器1不发送侦听结果。阅读器2发侦听结果的资源A关联于资源2。阅读器3发侦听结果的资源B关联于资源3。假设资源A，资源B和资源C在时域上的先后顺序为资源A早于资源B，资源B早于资源C。当阅读器1发侦听结果时，阅读器1在资源A发侦听结果。当阅读器1不发侦听结果时，阅读器2在资源A发侦听结果可以减少阅读器2的通信时延。
阅读器发送侦听结果的资源与之前发送侦听信号的资源之间有关联关系，根据此关联关系可以确定阅读器发送侦听结果的资源，节省了网络设备的开销。
在一个示例中，阅读器(如阅读器1，2和3)发送侦听结果的资源集合(第三资源集合)的起始位置，可以根据第一资源集合的结束位置确定，如二者之间有一个间隔，如第一资源集合的结束于时隙n，第三资源集合的起始位置在时隙n+4，该间隔可以为预定义值，或者通过信令(如第一信息)进行指示。第三资源与第一资源的关联关系为，第三资源在第三资源集合中的索引关联于第一资源。阅读器1根据上述方式，确定第三资源集合的起始位置，进而在其中确定第三资源。
在一个示例中，第一资源结束到第三资源起始位置之间有一个间隔，如第一资源结束于时隙n，第三资源的起始位置在时隙n+4，该间隔可以为预定义值，或者通过信令(如第一信息)进行指示。
同理，阅读器收第二信息的资源(第四资源)关联于阅读器收第二侦听信号的资源(第二资源)。阅读器收第二信息的资源与之前接收侦听信号的资源之间有关联关系，可以节省了网络设备的开销。
在一个示例中，以时域资源为例，进一步描述S705中，阅读器通过接收到的其它阅读器的侦听结果，如何根据预定义规则确定各自要占用的与标签通信的资源。阅读器根据各侦听结果自己确定与标签通信的时域资源，并通过该时域资源与标签通信。一种可能的确定时域资源的方式，可以按照预先确定的优先级确定时域资源。例如， 优先级可以为第一信息中指示的阅读器发送侦听信号资源的索引(如第一资源在第一资源集合的索引)。索引值越小，优先级越高等。每个阅读器考虑优先级比自己高的阅读器的时域资源占用情况，例如，有三个阅读器，优先级为阅读器1>阅读器2>阅读器3。对于阅读器1来说，预定义占用第一时域资源。对于阅读器2，知道阅读器1固定占用第一时域资源。阅读器2的候选资源为第一和第二时域资源。阅读器2根据对阅读器1的侦听结果以及收到的阅读器1对阅读器2的侦听结果中的至少一个，判断是否可以和阅读器1占用相同的与标签通信的时域资源。例如，根据侦听结果，阅读器1和阅读器2之间的相互干扰都很小(例如都小于一个门限)，则阅读器2也占用第一时域资源。如果阅读器1和阅读器2之间的相互干扰大，阅读器2和阅读器1不能用同样的时域资源和标签通信。则阅读器2占用第二时域资源和标签通信。同理，对于阅读器3，其候选资源为第一，第二和第三时域资源。此时，阅读器3已知阅读器1与标签通信的时域资源。阅读器3根据收到的阅读1和2的侦听结果中的至少一个，得到阅读1和2之间的干扰，采用和阅读器2相同的方法确定阅读器2与标签通信的时域资源。例如，阅读器1使用第一时域资源，阅读器2使用第二时域资源。阅读器3根据自己对阅读器1,2的侦听结果，以及阅读器1和阅读器2使用的时域资源，确定阅读器3的时域资源。或者，阅读器3根据阅读器1,阅读器2发给阅读器3的侦听结果，以及阅读器1和阅读器2使用的时域资源，确定阅读器3的时域资源。或者，阅读器3根据自己对阅读器1,2的侦听结果，阅读器1,阅读器2发给阅读器3的侦听结果，以及阅读器1和阅读器2使用的时域资源，确定阅读器3的时域资源。例如，阅读器3确定阅读器3和阅读器1的相互干扰大，不能占用相同的资源；而阅读器3和阅读器2的相互干扰小，可以使用同样的资源。则阅读器3确定使用第二时域资源。如果限定每个时域资源最多被2个阅读器使用，则第二时域资源已经达到上限，假设还有阅读器4需要确定与标签通信的资源，则阅读器4选择第一和第三时域资源中的一个。阅读器通过接收到的其它阅读器的侦听结果和对其他阅读侦听信号测量得到的侦听结果中的至少一个，根据预定义规则确定要占用的与标签通信的资源，降低了与基站之间信令开销。
在一个示例中，阅读器(如阅读器1，2和3)与标签通信的资源集合(第二资源集合)的起始位置，可以根据第三资源集合的结束位置确定，如二者之间有一个间隔，如第三资源集合的结束于时隙n，第二资源集合的起始位置在时隙n+4，该间隔可以为预定义值，或者通过信令(如第一信息)进行指示。
在一个示例中，阅读器不发送侦听结果，根据侦听结果自己确定与标签通信的资源，并向其他阅读器指示确定的与标签通信的资源。如图8所示，图8基于图6和图7。以下主要描述与图6和图7的不同之处。
S804之前的S601-S603和图6的S601-S603类似。例如，在S601-S603中，阅读器2(第二设备)接收来自于第一网络设备的第一信息，第一信息指示阅读器1发第一侦听信号的第一资源和阅读器2发第二侦听信号的第二资源。阅读器2在第二资源上发送第二侦听信号。阅读器2在第一资源上接收来自于阅读器1(第一设备)的第一侦听信号。详细内容参见图6的S601-S603,不再赘述。
S804：阅读器1确定与标签通信的资源。阅读器1根据对其它阅读器的侦听结果， 确定阅读器1与标签通信的资源。例如，阅读器1根据第二侦听信号，确定第一侦听结果。
S805：阅读器1向其他阅读器发送第二信息。第二信息指示阅读器1与标签通信的资源(第五资源)。
S806：阅读器2确定与标签通信的资源。阅读器2根据对其它阅读器的侦听结果，以及阅读器1将要占用的与标签通信资源，确定阅读器2与标签通信的资源。例如，阅读器2根据第一侦听信号，确定第二侦听结果。阅读器2在第六资源上接收第二信息。阅读器2根据第二侦听结果和第二信息，确定阅读器2与标签通信的资源(第七资源)。
S807：阅读器2向其他阅读器发送信息。该信息指示阅读器2与标签通信的第七资源。
S808：阅读器2与标签在第七资源上通信。此步骤与图6的S606类似，参见图6的S606，不再赘述。
阅读器不发送侦听结果，而发送指示该阅读器与标签通信的资源的信息，有利于降低信令开销。
以下以时域资源为例，对S804～S807做进一步说明。
阅读器向其他的阅读器发送第二信息。第二信息指示该阅读器确定的与标签通信的时域资源。阅读器发第二信息的资源可以关联于阅读器发送侦听信号的资源；阅读器发第二信息的资源也可以关联于阅读器的编号或标识。比如，网络设备为3个阅读器(阅读器1～3)分别分配了发送侦听信号的3个资源，这3个资源分别对应阅读器1～3发送第二信息的资源。网络设备为阅读器1分配了发侦听信号的资源1，为阅读器2分配了发侦听信号的资源2，为阅读器3分配发侦听信号的资源3。阅读器1发第二信息的资源A关联于资源1；阅读器2发第二信息的资源B关联于资源2；阅读器3发第二信息的资源C关联于资源3。例如，阅读器1～3发送第二信息在时间上的先后顺序可以与阅读器1～3发送侦听信号的先后顺序相同。
一种可能的方式，某些阅读器与标签通信的资源已经预先被确定，此时，该阅读器可以不发送第二信息。假设，资源1在时域早于资源2，资源2在时域早于资源3。一种可能的方式，阅读器1固定资源1与标签通信,其他阅读器也知道阅读器1占用资源1。阅读器1可以不发送第二信息。阅读器2和阅读器3需要指示他们各自与标签通信占用的资源。
一种可能的方式，按照预定义的顺序各阅读器依次确定与标签通信的时域资源，如下所示。
通过预定义方式，阅读器1预定义占用资源A，不发第二信息。对于阅读器2来说，知道阅读器1占用资源A，根据自己对阅读器1的侦听结果判断，是否可以和阅读器1占用相同的资源A，如可以则确定自己将要占用资源A。否则，阅读器2确定自己将要占用资源B与标签通信。并向其它阅读器发第二信息，指示自己将要占用资源B。
假设阅读器2向其它阅读器指示将要占用资源B。对于阅读器3来说，知道阅读器1占用资源A，根据阅读器2指示的资源B，以及自己对阅读器1和阅读器2的侦听结 果，判断自己是否可以占用资源A，如不可以，再判断自己是否可以占用资源B，如不可以，则自己占用资源C。并向其它阅读器指示自己将要占用的资源。对其它阅读器依次类推。
在一个示例中，对于阅读器1，预定义占用资源A。对于阅读器2，阅读器2的候选资源为资源A和资源B。根据侦听结果，阅读器1和阅读器2之间的相互干扰都很小(例如都小于一个门限)，则阅读器2也占用资源A。如果阅读器1和阅读器2之间的相互干扰大，阅读器2和阅读器1不能用同样的资源和标签通信。则阅读器2占用资源B和标签通信。阅读器2发第二信息，指示阅读器2将要占用资源B。同理，对于阅读器3，其候选资源为资源A，B，C。此时，阅读器3已知阅读器1和阅读器2使用的与标签通信的资源。例如，阅读器1使用资源A，阅读器2使用资源B。阅读器3根据自己对阅读器1的侦听结果判断，和阅读器1之间的干扰较大，不能占用相同资源，故阅读器3不能占用资源A。阅读器3接收到阅读器2的第二信息，知道阅读器2要占用资源B。阅读器3根据自己对阅读器2的侦听结果判断，和阅读器2之间的影响较小，可以占用相同资源。故阅读器3确定要占用资源B，并发送阅读器的第二信息，用于指示自己将要占用资源B。可选地，如限定每个资源最多被2个阅读器使用，则资源B的使用已经达到上限。假定如果还有阅读器4要确定与标签通信的资源，则阅读器4可以在资源A和C中进行选择。
第三资源集合的起始位置，和第二资源集合的起始位置的确定方式，参见图7描述。
在一个可能的方式中，阅读器将侦听信号和指示与标签通信的资源的信息在一个时域资源发送。如图9所示，图9基于图7～图8。
S601：和图6的S601类似。例如，阅读器1，阅读器2接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。详细内容参见图6,不再赘述。
S902：阅读器1确定与标签通信的资源。阅读器1根据预定义的规则，确定阅读器1与标签通信的资源。
S903：阅读器1在第一资源上发送第一侦听信号和阅读1的第二信息，该第二信息指示阅读器1与标签通信的资源(第五资源)。阅读器2在第一资源上接收来自于阅读器1的第一侦听信号和第二信息。
S904：阅读器2确定与标签通信的资源。阅读器2根据对阅读器1的侦听结果，以及阅读器1与标签通信资源，确定阅读器2与标签通信的资源。例如，阅读器2根据第一侦听信号，确定第二侦听结果。阅读器2根据第二侦听结果和第二信息，确定阅读器2与标签通信的第七资源。
S905：阅读器2在第二资源上发送第二侦听信号和指示第七资源的信息。
S606：与标签通信。此步骤与图6的S606类似，不再赘述。
在一个可能的设计中，第一侦听结果包括对所述第二侦听信号的测量值。当该测量值大于(或大于等于，或小于，或小于等于)第一阈值时，第五资源与所述第七资源不重叠。否则，第五资源与所述第七资源相同。根据阅读器之间的相互影响，确定是否占用相同的资源可以提升资源利用率。
阅读器将侦听信号和指示阅读器与标签通信的资源通过一个资源发送，可以降低 时延。
图10-18以资源为时域资源为例，对图6～图9做进一步说明。
图10给出了以资源为时域资源为例，网络设备，阅读器和标签的通信过程。
图10中有一个网络设备，3个阅读器。图10分为5个阶段。
阶段1.网络设备调度侦听信号。即网络设备发第一信息。该步骤与S601类似。
阶段2.阅读器发送侦听信号。该步骤和步骤S602类似。
阶段3.阅读器发送侦听结果。该步骤和S604类似。图10中阶段3的阅读器发送结果是阅读器1,2,3分别发送侦听结果。
阶段4.网络设备调度阅读器与标签通信的资源。换言之，网络设备调度RFID的通信资源。该步骤和S605类似。
阶段5.阅读器与标签通信。该步骤和S606类似。
在图10-18，定义一轮侦听过程，在一轮侦听过程中有一个阶段2。
如图10所示，在阶段5，假设阅读器1分配的是索引1的时域资源，给阅读器2和3分配了索引2的时域资源。，阅读器2和3在同样的时域资源和标签通信。例如，阅读器2和3使用索引2的时域资源进行盘存。
图10也给出了第一资源集合，一个资源单元，第一资源时域起始位置，第二资源时域起始位置的示意图。
图10中网络设备一次调度了阅读器1,阅读器2,阅读器3和标签通信的资源。网络设备也可以一次调度阅读器1,阅读器2,阅读器3中一部分的阅读器和标签通信的资源，如图11所示。图11基于图10。图11中第一轮的阶段1-4参见图10的阶段1-4。但图11第一轮的阶段4只调度了阅读器1与标签通信。
在第二轮的侦听过程中，网络设备调度侦听资源，可以调度上一轮未被调度的阅读器，如阅读器2和阅读器3，也可以调度未参与上一轮侦听的新阅读器，如阅读器4等。在图11的第二轮侦听中，网络设备根据收到的侦听结果，确定阅读器2与阅读器3之间的干扰小，在同样的时域资源调度了阅读器2、阅读器3和标签通信。
图12基于图11，图12中第一轮的阶段1-5参见图10的第一轮的阶段1-5。图12中的第一轮阶段4，网络设备通知参与侦听的阅读器中哪个阅读器被调度与标签通信，例如，网络设备通知阅读器2和阅读器3，阅读器1被调度与标签通信。可选地，网络设备通知参与侦听的阅读器哪个阅读器未被调度与标签通信。网络设备可以通过组播或单播的方式通知。未被调度的阅读器根据网络设备的通知(例如，第二信息)，确定下一轮发送侦听信号的时域资源总数以及自己对应的发送侦听信号的时域资源等。例如，在第二轮的侦听中，阅读器2和阅读器3根据网络设备的通知，确定阅读器2和阅读器3在第一轮未被调度。阅读器2和阅读器3根据预定义的规则，确定阅读器2和阅读器3第二轮侦听的时域资源。一种方式是阅读器2和阅读器3第二轮侦听的时域资源和第一轮网络设备调度阅读器2和阅读器3侦听的时域资源关联。例如，阅读器2和阅读器3第二轮发侦听的顺序和第一轮阅读器2和阅读器3的顺序相同。如 图2所示，在第二轮侦听,阅读器2先发侦听信号，阅读器3后侦听信号。阅读器2和阅读器3第二轮发侦听的顺序和第一轮阅读器2和阅读器3的顺序也可以相反，即第一轮先发侦听的阅读器在第二轮后发侦听。图12中第二轮侦听的阶段3-5参见图10，不再赘述。
图13基于图12，在第二轮的侦听没有网络设备进行调度，新的阅读器4还可以在第二阶段加入，发送侦听信号。在图13中，由于每轮发送(或调度发送)侦听信号的时域资源总数有限，比如最多三个。而有更多的阅读器需要与标签通信，例如有5个阅读器需要与标签通信。5个阅读器的编号分别1～5，也就是阅读器1～阅读器5。第一轮，网络设备为阅读器1～阅读器3分配了侦听时域资源。但在第一轮，网络设备只调度了阅读器1与标签通信。假设阅读器的编号与网络设备调度的侦听过程的优先级关联，例如编号小的阅读器优先级比编号大的阅读器高。在第二轮，阅读器2～阅读器5都有侦听的需求。但相对于阅读器5，阅读器2～阅读器4,优先级更高，所以在第二轮的阶段2，阅读器2～阅读器4发侦听信号。
以上示例，每次阅读器和标签通信的时域资源长度固定。图14给出了每次阅读器和标签通信的时域资源长度不固定时，如何进行侦听及其后续的通信。图14基于图12。在图14中，引入了阶段6，在阶段6，阅读器通知网络设备与标签通信结束。在这种情况下，何时与标签的通信结束由阅读器自己确定。如阅读器1经过1次或多次对标签的查询流程后，发现已经没有新的标签上报标签标识了，阅读器1确定与标签的通信结束，并通知网络设备阅读器1与标签通信结束。网络设备一次调度一个阅读器与标签通信。第一次，网络设备调度阅读器1与标签通信。第二次网络设备调度阅读器2与标签通信。
图15基于图14，图15第一轮阶段1-6和图14类似，不再赘述。但图15的第二轮侦听过程有完整的阶段1-6。在第二轮的侦听过程，网络设备调度阅读器2和3在同样的时刻开始与标签通信。阅读器2和3与标签通信完成后，向基站发送信息，通知网络设备通信结束。
图16基于图15，图16第一轮阶段1-6和图14、图15类似，不再赘述。在第二轮的阶段1A和图15的阶段1有区别。在阶段1A，网络设备指示第一资源集合的起始位置。在第一轮阅读器1被调度与标签通信，阅读器1-3都发了侦听信号。阅读器2，3在第一轮没有被调度。在第二轮，阅读发送侦听信号的时域资源单元大小和第一轮一样。在第一轮，阅读器2，3获得如下信息；阅读器1-3发侦听信号，且阅读器1被调度与标签通信。根据上述信息，阅读器2-3可知第二轮阅读2-3需要发侦听信号。根据阅读器2-3各自的优先级确定发送侦听信号的资源。例如，阅读器2高于阅读器3，则阅读器2占用第一资源集合的中第一个资源发侦听信号；阅读器3占用第一资源集合的中第二个资源发侦听信号。其他的过程与图15类似，不再赘述。
将图10-图16中的阶段4(网络设备调度阅读器与标签通信的资源)删掉，就是用于说明图7通信过程(阅读器根据侦听结果自己确定与标签通信的资源)的示意图。如图10所示，删掉阶段4后，阶段1,2,3,5是一轮侦听过程。如图11所示，删掉阶段4后，第一轮侦听过程包括阶段1,2,3,5第二轮侦听过程包括阶段1,2,3,5。如图 12所示，删掉阶段4后，第一轮侦听过程包括阶段1,2,3,5；第二轮侦听过程包括阶段2,3,5。如图12所示，删掉阶段4后，第一轮侦听过程包括阶段1,2,3,5；第二轮侦听过程包括阶段2,3,5。如图14所示，删掉阶段4后，第一轮侦听过程包括第一阶段1,2,3,5，6，还包括第二次的阶段5，6。和图10-图14不同，在这种情况下，在阶段3中，阅读器向其它阅读器发侦听结果。关于阅读器如何根据侦听结果确定与标签通信的资源，可以参见图7的描述。
图17是在图8所示的情况下，网络设备，阅读器和标签的通信在时域的示意图。
与图10相比，图17的阶段1，2和图10的阶段1,2类似，图17的阶段4和图10的阶段5类似，不再赘述。图17和图10主要区别在于阶段3，在图17，阶段3是阅读器指示与标签通信的资源。例如，阅读器1-3依次向其他阅读器发送指示自己与标签通信的资源的信息。其他细节，请参见图6-16的描述，不再赘述。
图18是在图9所示的情况下，网络设备，阅读器和标签的通信在时域示意图。图18的阶段1和图17的阶段1类似，图18的阶段3和图17的阶段4类似，不再赘述。图18的阶段2阅读器在一个时域资源上发送侦听信号和指示与标签通信的资源。如图18，阅读器1在一个时域资源上发送侦听信号和指示阅读器1与标签通信资源的信息；然后，阅读器2在一个时域资源上发送侦听信号和指示阅读器2与标签通信的资源的信息；最后，阅读器3在一个时域资源上发送侦听信号和指示阅读器3与标签通信的资源的信息。
其他细节，请参见图6-16的描述，不再赘述。
对以上实施例，在一个示例中，发送一个侦听信号的时域资源包括A个时域符号，A>1。可以使用如下的格式承载侦听信号。
格式1：A个时域符号中前k个符号用于传输侦听信号。一个符号承载一个序列，单个符号的传输方式可参考3GPP TS38.211 v16.2.0的8.3.4节物理侧行反馈信道(Physical Sidelink Feedback Channel，PSFCH)的传输方式。随后的m个符号为保护符号(GAP)。保护符号不传输任何内容，可以用于收发转换，避免由于阅读器间定时不一致带来的干扰(k+m＝A)。例如，发送一个侦听信号的时域资源包括5个时域符号，前4个符号用于传输侦听信号，最后1个符号作为保护符号。
格式2：A个时域符号中前k个符号的每个符号内，频域资源上某些RE位置承载一个序列，其余RE位置可以设置为传输全0比特信息或传输随机比特信息等。格式2的传输方式可参考3GPP TS38.211 v16.2.0的8.4.1.3节物理侧行控制信道(Physical Sidelink Control CHannel，PSCCH)DMRS的传输方式。随后的m个符号为保护符号。一种可能的方式，发送一个侦听信号的时域资源包括一个时隙，一个时隙有14个符号，前13个符号，一个符号频域上每4个RE中有1个RE为侦听信号，每符号上侦听信号的RE频域位置相同。最后有1个符号作为保护符号。
格式3：A个时域符号中前k个符号的部分符号承载序列。序列可以占满该符号内分配的所有频域资源，也可以仅占用部分RE。A个符号中没有承载侦听信号的RE可以 用于传输信息，也可用于传输全0比特信息或传输随机比特信息等。格式3的传输方式可参考3GPP TS38.211 v16.2.0的8.4.1.1节物理侧行共享信道(Physical Sidelink Shared Channel，PSSCH)DMRS的传输方式。同格式1,2一样，后面m个符号是保护符号。如A＝14，前13个符号中第一个和最后一个符号上有侦听信号，频域每3个RE中有一个RE为侦听信号，第14个符号作为保护符号。
为提升可靠性，侦听信号可以重复发送。以格式2为例，重复发送一次侦听信号。此时，发送侦听信号的时域资源包括两个时隙，在这两个时隙中，第二个时隙是第一个时隙的重复。可选地，在这两个时隙中，侦听信号被重复发送了一次，但只在第2个时隙有GAP。
对于阅读器发送通信结束的信息，同样可以使用格式1-3来发送。
可以使用如下的格式发送阅读器的侦听结果：
格式4：格式4类似于格式2，与格式2的区别在于：
1)不是GAP的符号中不承载序列的RE不是传输全0比特信息或传输随机比特信息，而是承载有用数据。例如，有用数据是侦听结果(编码、调制、资源映射等方式可以参考3GPP TS38.211 v16.2.0的8.3.2节和TS38.212 v16.2.0的8.3节物理侧行控制信道(Physical Sidelink Control CHannel，PSCCH)的传输方式)；
2)格式2中的侦听信号在格式4中作为DMRS。
格式5：格式5类似于格式3，与格式3的区别在于：
1)不是GAP的符号中不承载序列的RE不是传输全0比特信息或传输随机比特信息，而是承载有用数据。例如，有用数据是侦听结果(编码、调制、资源映射等方式可以参考3GPP TS38.211 v16.2.0的8.3.1节和TS38.212 v16.2.0的8.2节物理侧行控制信道(Physical Sidelink Shared CHannel，PSSCH)的传输方式)；
2)格式3中的侦听信号在格式5中作为DMRS。
对于图18中的阅读器发送侦听信号和指示与标签通信的资源信息，可以使用格式6和7来发送。格式6类似于格式4，格式7类似于格式5，区别在于，格式6和格式7中的DMRS同时还作为侦听信号。有用数据是指示与标签通信的资源的信息。
第一信息可以通过一个信息或消息发送。第一信息也可以通过多个信令或消息发送。例如第一信息的多个字段可以通过多个信令发送。第二信息类似，不再赘述。
以上实施例描述，如图6-18的描述的特征，如没有特殊的说明，可以互相引用。
图19和图20为本申请的实施例提供的可能的通信装置的结构示意图。这些通信装置可以实现上述方法实施例中终端设备或网络设备的功能，因此也能实现上述方法实施例所具备的有益效果。在本申请实施例中，该通信装置可以是如图2所示的网络设备110，也可以是如图2所示的阅读器120，还可以是应用于阅读器或网络设备的单元(如芯片)。
如图19所示，通信装置1900包括处理单元1901，收发单元1902和存储单元1903。通信装置900可用于实现上述图6-图16所示的方法实施例中终端设备或网络设备的功能。存储单元1903存储处理单元1901执行的程序。收发单元1902用于收发信号。处理单元1901用于处理收发单元1902收发的信号以及控制收发单元1902收发信号。
当通信装置1900用于实现图6-16所述方法实施例中阅读器的功能时，收发单元 1902用于接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。收发单元1902还用于在第一资源上发送第一侦听信号，在第二资源上接收来自于第二设备的第二侦听信号。处理单元1901用于根据所述第二侦听信号，确定第一侦听结果。收发单元1902还用于在第三资源上发送所述第一侦听结果，在第四资源上接收第二信息。处理单元1901还用于根据第二信息，确定第五资源。收发单元1902用于在所述第五资源上与标签通信。处理单元1901还用于控制收发单元1902在第五资源上与标签通信以及收发信号。
当通信装置1900用于实现图6-16所述方法实施例中网络设备的功能时：收发单元1902用于发送第一信息，第一信息指示第一资源和第二资源，第一资源用于第一设备发送第一侦听信号，第二资源用于第二设备发送第二侦听信号。收发单元1902还用于在第三资源接收来自于第一设备的第一侦听结果，在第六资源接收来自于第二设备的第二侦听结果。处理单元1901用于根据所述第一侦听结果和所述第二侦听结果，确定第二信息，第二信息指示第一设备与标签通信的第五资源。收发单元1902还用于在第四资源上向所述第一设备发送第二信息。处理单元1901还用于控制收发单元1902以及收发上述信号。
当通信装置1900用于实现图6-16所述方法实施例中阅读器的功能时，收发单元1902用于接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。收发单元1902还用于在第二资源上发送第二侦听信号。收发单元1902还用于在在第一资源上接收来自于阅读器1的第一侦听信号。处理单元1901用于根据第一侦听信号，确定第二侦听结果。收发单元1902还用于在第六资源上接收第二信息，该第二信息指示阅读器1与标签通信的第五资源。处理单元1901在根据第二侦听结果和第二信息，确定与标签通信的第七资源。收发单元1902还用于发送指示第七资源的信息，并在第七资源上与标签通信。
当通信装置1900用于实现图6-16所述方法实施例中阅读器的功能时，收发单元1902用于接收来自于第一网络设备的第一信息，第一信息指示第一资源和第二资源。收发单元1902还用于在第一资源上发送第一侦听信号。收发单元1902还用于在第一资源上接收来自于阅读器1的第一侦听信号和第二信息，该第二信息指示阅读器1与标签通信的第五资源。处理单元1901用于根据第一侦听信号，确定第二侦听结果。处理单元1901还用于根据第二侦听结果和第二信息，确定与标签通信的第七资源。收发单元1902还用于在第二资源上发送第二侦听信号和指示第七资源的信息。收发单元1902还用于在第七资源上与标签通信。
关于上述收发单元901和处理单元902更详细的描述，可参考上述方法实施例中的相关描述，在此不再说明。
如图20所示，通信装置2000包括处理器2002、收发器2003、存储器2001以及总线2004。其中，收发器2003、处理器2002以及存储器2001通过总线2004相互连接；总线2004可以是PCI总线或EISA总线等。所述总线可以分为地址总线、数据总线、控制总线等。为便于表示，图20中仅用一条粗线表示，但并不表示仅有一根总线或一种类型的总线。存储器2001存储处理器2002执行的程序。收发器2003用于收发 信号。处理器2002用于处理收发器2003收发的信号以及控制收发器2003收发信号。
当通信装置2000是在图6-图16方法实施例中的网络设备时，收发器2003用于发送指示阅读器发送侦听信号的资源的信息(第一信息)，接收阅读器发送的侦听结果，以及发送指示阅读器与标签通信的资源的信息(第二信息)等。处理器2002用于根据收到的阅读器的侦听结果，确定阅读器与标签通信的资源等。具体参见图6-16的实施例，不再赘述。实际上，处理器2002用于执行上述处理单元1901的功能、收发器2003用于执行上述收发单元1902的功能、存储器2001用于执行上述存储单元1903的功能。
当上述通信装置为应用于终端设备的芯片时，该终端设备芯片实现上述方法实施例中终端设备的功能。该终端设备芯片从终端设备中的其它模块(如射频模块或天线)接收信息，该信息是网络设备发送给终端设备的；或者，该终端设备芯片向终端设备中的其它模块(如射频模块或天线)发送信息，该信息是终端设备发送给网络设备的。
当上述通信装置为应用于网络设备的芯片时，该网络设备芯片实现上述方法实施例中网络设备的功能。该网络设备芯片从网络设备中的其它模块(如射频模块或天线)接收信息，该信息是终端设备发送给网络设备的；或者，该网络设备芯片向网络设备中的其它模块(如射频模块或天线)发送信息，该信息是网络设备发送给终端设备的。
可以理解的是，本申请的实施例中的处理器可以是中央处理单元(central processing unit，CPU)，还可以是其它通用处理器、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件、晶体管逻辑器件，硬件部件或者其任意组合。通用处理器可以是微处理器，也可以是任何常规的处理器。
本申请的实施例中的方法步骤可以通过硬件的方式来实现，也可以由处理器执行软件指令的方式来实现。软件指令可以由相应的软件模块组成，软件模块可以被存放于随机存取存储器(random access memory，RAM)、闪存、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)、寄存器、硬盘、移动硬盘、CD-ROM或者本领域熟知的任何其它形式的存储介质中。一种示例性的存储介质耦合至处理器，从而使处理器能够从该存储介质读取信息，且可向该存储介质写入信息。当然，存储介质也可以是处理器的组成部分。处理器和存储介质可以位于ASIC中。另外，该ASIC可以位于接入网设备或终端设备中。当然，处理器和存储介质也可以作为分立组件存在于接入网设备或终端设备中。
在上述实施例中，可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时，可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机程序或指令。在计算机上加载和执行所述计算机程序或指令时，全部或部分地执行本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其它可编程装置。所述计算机程序或指令可以存储在计算机可读存储介质中，或者通过所述计算机可读存储介质进行传输。所述计算机可读存储介质可以是计算机能够存取的任何可用介质或者是集成一个或多 个可用介质的服务器等数据存储设备。所述可用介质可以是磁性介质，例如，软盘、硬盘、磁带；也可以是光介质，例如，DVD；还可以是半导体介质，例如，固态硬盘(solid state disk，SSD)。
在本申请的各个实施例中，如果没有特殊说明以及逻辑冲突，不同的实施例之间的术语和/或描述具有一致性、且可以相互引用，不同的实施例中的技术特征根据其内在的逻辑关系可以组合形成新的实施例。
本申请中，“至少一个”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B的情况，其中A,B可以是单数或者复数。在本申请的文字描述中，字符“/”，一般表示前后关联对象是一种“或”的关系。.
可以理解的是，在本申请的实施例中涉及的各种数字编号仅为描述方便进行的区分，并不用来限制本申请的实施例的范围。上述各过程的序号的大小并不意味着执行顺序的先后，各过程的执行顺序应以其功能和内在逻辑确定。

Claims (26)

  1. 一种在第一设备执行的侦听方法，其特征在于，包括：
    接收来自于第一网络设备的第一信息，所述第一信息指示第一资源和第二资源；
    在第一资源上发送第一侦听信号；
    在第二资源上接收来自于第二设备的第二侦听信号；
    根据所述第二侦听信号，确定第一侦听结果；
    在第三资源上发送所述第一侦听结果；
    在第四资源上接收第二信息；
    根据所述第二信息，确定第五资源；
    在所述第五资源上与标签通信。
  2. 根据权利要求1所述的方法，所述发送第一侦听结果，包括：
    向所述第一网络设备发送所述第一侦听结果；
    所述接收第二信息，包括：
    接收来自于所述第一网络设备的所述第二信息，所述第二信息指示第五资源。
  3. 根据权利要求1或2所述的方法，所述第三资源关联于所述第一资源。
  4. 根据权利要求1-3任意一项所述的方法，所述第一侦听结果包括所述第二侦听信号的测量值，或所述第二侦听信号的测量值与门限的比较结果。
  5. 根据权利要求1-4任意一项所述的方法，所述第一信息指示第一资源和第二资源，包括：
    所述第一信息指示如下参数的至少一个：
    第一资源集合的起始位置，所述第一资源集合包括第一资源和所述第二资源，
    所述第一资源集合包括的资源单元的数目，
    所述第一资源在所述第一资源集合的索引，
    所述第二资源在所述第一资源集合的索引。
  6. 根据权利要求1-5任意一项所述的方法，所述第五资源属于第二资源集合，
    所述第二信息指示如下参数的至少一个：
    所述第二资源集合的起始位置，
    所述第二资源集合包括的资源单元的数目，
    所述第五资源在所述第二资源集合中的索引。
  7. 根据权利要求1,3-5任意一项所述的方法，所述发送第一侦听结果，包括：
    向所述第二设备发送所述第一侦听结果；
    所述接收第二信息，包括：
    接收来自于所述第二设备的所述第二信息，所述第二信息包括所述第二设备的第二侦听结果。
  8. 根据权利要求7所述的方法，根据所述第二信息，确定第五资源，包括：
    根据所述第二侦听结果和所述第一侦听结果，确定所述第五资源。
  9. 根据权利要求1-8任意一项所述的方法，所述侦听信号是参考信号。
  10. 根据权利要求1-9任意一项所述的方法，所述第二信息指示一个或多个被调度的与标签通信的设备的标识。
  11. 根据权利要求1-10任意一项所述的方法，所述第一信息承载在以下至少一个信令中：
    单播信令，多播信令和广播信令。
  12. 一种在第一网络设备执行的侦听方法，其特征在于，包括：
    发送第一信息，所述第一信息指示第一资源和第二资源，所述第一资源用于第一设备发送第一侦听信号，所述第二资源用于第二设备发送第二侦听信号；
    在第三资源接收来自于所述第一设备的第一侦听结果；
    在第六资源接收来自于所述第二设备的第二侦听结果；
    根据所述第一侦听结果和所述第二侦听结果，确定第二信息，所述第二信息指示所述第一设备与标签通信的第五资源；
    在第四资源上向所述第一设备发送第二信息。
  13. 根据权利要求12所述的方法，所述第一信息指示第一资源和第二资源，包括：
    所述第一信息指示如下参数的至少一个：
    第一资源集合的起始位置，所述第一资源集合包括第一资源和所述第二资源，
    所述第一资源集合包括的资源单元的数目，
    所述第一资源在所述第一资源集合的索引，
    所述第二资源在所述第一资源集合的索引。
  14. 根据权利要求12或13所述的方法，所述第五资源属于第二资源集合，
    所述第二信息指示如下参数的至少一个：
    所述第二资源集合的起始位置，
    所述第二资源集合包括的资源单元的数目，
    所述第五资源在所述第二资源集合中的索引。
  15. 根据权利要求12-14任意一项所述的方法，所述侦听信号是参考信号。
  16. 根据权利要求12-15任意一项所述的方法，所述第二信息指示一个或多个被调度的与标签通信的设备的标识。
  17. 根据权利要求12-16任意一项所述的方法，所述第一信息承载在以下至少一个信令中：
    单播信令，多播信令和广播信令。
  18. 一种通信装置，包括：用于执行如权利要求1-11任一项所述的方法的单元。
  19. 一种通信装置，包括处理器，所述处理器与存储器耦合，所述存储器存储指令，当所述指令被所述处理器执行时，使得第一设备执行权利要求1-11任一项所述的方法。
  20. 根据权利要求19所述的通信装置，所述通信装置是所述第一设备，所述通信装置还包括收发器。
  21. 根据权利要求19所述的通信装置，所述通信装置是所述第一设备中的通信装置。
  22. 根据权利要求19-21任意一项所述的通信装置，所述通信装置还包括所述存储器。
  23. 一种计算机可读存储介质，其特征在于，所述存储介质中存储软件程序，所述软件程序被执行时，权利要求1-11中任一项所述的方法被执行。
  24. 一种通信装置，包括：用于执行如权利要求12-17任一项所述的方法的单元。
  25. 一种通信装置，包括处理器和存储器，所述存储器存储指令，当所述指令被所述处理器执行时，使得网络设备执行权利要求12-17任一项所述的方法。
  26. 一种计算机可读存储介质，其特征在于，所述存储介质中存储软件程序，所述软件程序被执行时，权利要求12-17中任一项所述的方法被执行。
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