WO2023004583A1 - Procédé de communication sans fil et dispositif terminal - Google Patents

Procédé de communication sans fil et dispositif terminal Download PDF

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Publication number
WO2023004583A1
WO2023004583A1 PCT/CN2021/108659 CN2021108659W WO2023004583A1 WO 2023004583 A1 WO2023004583 A1 WO 2023004583A1 CN 2021108659 W CN2021108659 W CN 2021108659W WO 2023004583 A1 WO2023004583 A1 WO 2023004583A1
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WIPO (PCT)
Prior art keywords
time
frequency resource
terminal device
backscatter signal
resource set
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PCT/CN2021/108659
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English (en)
Chinese (zh)
Inventor
崔胜江
徐伟杰
左志松
贺传峰
张治�
Original Assignee
Oppo广东移动通信有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by Oppo广东移动通信有限公司 filed Critical Oppo广东移动通信有限公司
Priority to PCT/CN2021/108659 priority Critical patent/WO2023004583A1/fr
Priority to CN202180097234.0A priority patent/CN117203639A/zh
Publication of WO2023004583A1 publication Critical patent/WO2023004583A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication

Definitions

  • the embodiments of the present application relate to the communication field, and more specifically, relate to a wireless communication method and a terminal device.
  • zero-power terminals In zero-power communication, zero-power terminals need to collect radio waves sent by network nodes to obtain energy before driving themselves to work. How zero-power terminals perform initial transmission and retransmission is an urgent problem to be solved.
  • Embodiments of the present application provide a wireless communication method and a terminal device.
  • a zero-power consumption terminal can determine an uplink channel and/or time-frequency resource set for initial transmission and retransmission, thereby improving the backscatter transmission performance of the terminal device.
  • a wireless communication method includes:
  • the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times, and/or, the terminal device determines a time-frequency resource set for transmitting the target backscatter signal multiple times.
  • a second aspect provides a terminal device configured to execute the method in the first aspect above.
  • the terminal device includes a functional module for executing the method in the first aspect above.
  • a terminal device including a processor and a memory.
  • the memory is used to store a computer program
  • the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect above.
  • an apparatus for implementing the method in the first aspect above.
  • the device includes: a processor, configured to invoke and run a computer program from a memory, so that a device installed with the device executes the method in the first aspect above.
  • a fifth aspect provides a computer-readable storage medium for storing a computer program, and the computer program causes a computer to execute the method in the first aspect above.
  • a computer program product including computer program instructions, the computer program instructions causing a computer to execute the method in the first aspect above.
  • a computer program which, when running on a computer, causes the computer to execute the method in the first aspect above.
  • the terminal device determines the uplink channel used to transmit the target backscatter signal multiple times, and/or the terminal device determines the time-frequency resource set used to transmit the target backscatter signal multiple times, so that the terminal device can improve Excellent backscatter transmission performance, reducing the probability of conflicts with other terminal devices in multiple transmissions.
  • FIG. 1 is a schematic diagram of a communication system architecture applied in an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a zero-power communication provided by the present application.
  • Fig. 3 is a schematic diagram of backscatter communication provided by the present application.
  • Fig. 4 is a schematic diagram of energy harvesting provided by the present application.
  • Fig. 5 is a schematic circuit diagram of a resistive load modulation provided in the present application.
  • Fig. 6 is a schematic flowchart of a wireless communication method provided according to an embodiment of the present application.
  • Fig. 7 is a schematic diagram of an uplink channel pair during FSK modulation provided according to an embodiment of the present application.
  • Fig. 8 is a schematic diagram of a BSCH used for initial transmission and retransmission of a backscatter signal according to an embodiment of the present application.
  • FIG. 9 is a schematic diagram of another BSCH used for initial transmission and retransmission of a backscatter signal according to an embodiment of the present application.
  • Fig. 10 is a schematic diagram of a set of time-frequency resources used for initial transmission and retransmission of backscattered signals according to an embodiment of the present application.
  • FIG. 11 is a schematic diagram of another set of time-frequency resources used for initial transmission and retransmission of backscattered signals according to an embodiment of the present application.
  • Fig. 12 is a schematic diagram of a set of time-frequency resources provided according to an embodiment of the present application.
  • Fig. 13 is a schematic diagram of another set of time-frequency resources provided according to an embodiment of the present application.
  • Fig. 14 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • Fig. 15 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • Fig. 16 is a schematic block diagram of a device provided according to an embodiment of the present application.
  • Fig. 17 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • the technical solution of the embodiment of the present application can be applied to various communication systems, such as: Global System of Mobile communication (Global System of Mobile communication, GSM) system, code division multiple access (Code Division Multiple Access, CDMA) system, broadband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, General Packet Radio Service (GPRS), Long Term Evolution (LTE) system, Advanced long term evolution (LTE-A) system , New Radio (NR) system, evolution system of NR system, LTE (LTE-based access to unlicensed spectrum, LTE-U) system on unlicensed spectrum, NR (NR-based access to unlicensed spectrum) on unlicensed spectrum unlicensed spectrum (NR-U) system, Non-Terrestrial Networks (NTN) system, Universal Mobile Telecommunications System (UMTS), Wireless Local Area Networks (WLAN), Wireless Fidelity (Wireless Fidelity, WiFi), fifth-generation communication (5th-Generation, 5G) system or other communication systems, etc.
  • GSM Global System of Mobile
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V Vehicle to Vehicle
  • V2X Vehicle to everything
  • the communication system in the embodiment of the present application can be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, can also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and can also be applied to an independent (Standalone, SA ) meshing scene.
  • Carrier Aggregation, CA Carrier Aggregation
  • DC Dual Connectivity
  • SA independent meshing scene
  • the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, where the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to a licensed spectrum, Wherein, the licensed spectrum can also be regarded as a non-shared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (User Equipment, UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.
  • user equipment User Equipment, UE
  • access terminal user unit
  • user station mobile station
  • mobile station mobile station
  • remote station remote terminal
  • mobile device user terminal
  • terminal wireless communication device
  • wireless communication device user agent or user device
  • the terminal device can be a station (STATION, ST) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA) devices, handheld devices with wireless communication functions, computing devices or other processing devices connected to wireless modems, vehicle-mounted devices, wearable devices, next-generation communication systems such as terminal devices in NR networks, or future Terminal equipment in the evolved public land mobile network (Public Land Mobile Network, PLMN) network, etc.
  • PLMN Public Land Mobile Network
  • the terminal device can be deployed on land, including indoor or outdoor, handheld, wearable or vehicle-mounted; it can also be deployed on water (such as ships, etc.); it can also be deployed in the air (such as aircraft, balloons and satellites) superior).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with a wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal Equipment, wireless terminal equipment in industrial control, wireless terminal equipment in self driving, wireless terminal equipment in remote medical, wireless terminal equipment in smart grid , wireless terminal equipment in transportation safety, wireless terminal equipment in smart city, or wireless terminal equipment in smart home.
  • a virtual reality (Virtual Reality, VR) terminal device an augmented reality (Augmented Reality, AR) terminal Equipment
  • wireless terminal equipment in industrial control wireless terminal equipment in self driving
  • wireless terminal equipment in remote medical wireless terminal equipment in smart grid
  • wireless terminal equipment in transportation safety wireless terminal equipment in smart city, or wireless terminal equipment in smart home.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be called wearable smart devices, which is a general term for the application of wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also achieve powerful functions through software support, data interaction, and cloud interaction.
  • Generalized wearable smart devices include full-featured, large-sized, complete or partial functions without relying on smart phones, such as smart watches or smart glasses, etc., and only focus on a certain type of application functions, and need to cooperate with other devices such as smart phones Use, such as various smart bracelets and smart jewelry for physical sign monitoring.
  • the network device may be a device for communicating with the mobile device, and the network device may be an access point (Access Point, AP) in WLAN, a base station (Base Transceiver Station, BTS) in GSM or CDMA , or a base station (NodeB, NB) in WCDMA, or an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and an NR network A network device or a base station (gNB) in a network device or a network device in a future evolved PLMN network or a network device in an NTN network.
  • AP Access Point
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • Evolutional Node B, eNB or eNodeB evolved base station
  • LTE Long Term Evolution
  • eNB evolved base station
  • gNB base station
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network equipment may be a satellite, balloon station.
  • the satellite can be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geosynchronous earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite. ) Satellite etc.
  • the network device may also be a base station installed on land, in water, or other locations.
  • the network device may provide services for a cell, and the terminal device communicates with the network device through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell, and the cell may be a network device ( For example, a cell corresponding to a base station), the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell), and the small cell here may include: a metro cell (Metro cell), a micro cell (Micro cell), a pico cell ( Pico cell), Femto cell, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the transmission resources for example, frequency domain resources, or spectrum resources
  • the cell may be a network device (
  • the cell may belong to a macro base station, or may belong to a base station corresponding to a small cell (Small cell)
  • the small cell here may include: a metro cell (Metro cell), a micro cell (Micro
  • the communication system 100 may include a network device 110, and the network device 110 may be a device for communicating with a terminal device 120 (or called a communication terminal, terminal).
  • the network device 110 can provide communication coverage for a specific geographical area, and can communicate with terminal devices located in the coverage area.
  • FIG. 1 exemplarily shows one network device and two terminal devices.
  • the communication system 100 may include multiple network devices and each network device may include other numbers of terminal devices within the coverage area. This embodiment of the present application does not limit it.
  • the communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
  • a device with a communication function in the network/system in the embodiment of the present application may be referred to as a communication device.
  • the communication equipment may include a network equipment 110 and a terminal equipment 120 with communication functions.
  • the network equipment 110 and the terminal equipment 120 may be the specific equipment described above, and will not be repeated here.
  • the communication device may also include other devices in the communication system 100, such as network controllers, mobility management entities and other network entities, which are not limited in this embodiment of the present application.
  • the "indication" mentioned in the embodiments of the present application may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
  • the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is indicated, configuration and is configuration etc.
  • predefined or “preconfigured” can be realized by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices).
  • devices for example, including terminal devices and network devices.
  • pre-defined may refer to defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.
  • RFID tags are also called “radio frequency tags” or “electronic tags”.
  • RFID tags are also called “radio frequency tags” or “electronic tags”.
  • active electronic tags also known as active electronic tags, means that the energy of the electronic tags is provided by the battery.
  • the battery, memory and antenna together constitute an active electronic tag, which is different from the passive radio frequency activation method. Set the frequency band to send information.
  • Passive electronic tags also known as passive electronic tags, do not support built-in batteries.
  • the tags When passive electronic tags are close to the reader, the tags are in the near-field range formed by the radiation of the reader antenna.
  • the electronic tag antenna generates an induced current through electromagnetic induction. , the induced current drives the chip circuit of the electronic label.
  • the chip circuit sends the identification information stored in the tag to the reader through the electronic tag antenna.
  • Semi-active electronic tags inherit the advantages of small size, light weight, low price and long service life of passive electronic tags.
  • the built-in battery supplies power to the RFID chip to increase the reading and writing distance of the tag and improve the reliability of communication.
  • RFID is a wireless communication technology.
  • the most basic RFID system is composed of two parts: electronic tags (TAG) and readers (Reader/Writer).
  • Electronic tag It is composed of coupling components and chips. Each electronic tag has a unique electronic code, which is placed on the measured target to achieve the purpose of marking the target object.
  • Reader It can not only read the information on the electronic tag, but also write the information on the electronic tag, and at the same time provide the electronic tag with the energy required for communication. as shown in picture 2. After the electronic tag enters the electromagnetic field, it receives the radio frequency signal sent by the reader.
  • the passive electronic tag or passive electronic tag uses the energy obtained by the electromagnetic field generated in the space to transmit the information stored in the electronic tag.
  • the reader reads the information and performs Decode to identify the electronic tag.
  • a typical zero-power communication system includes a reader and a zero-power terminal.
  • the reader emits radio waves to provide energy to zero-power terminals.
  • the energy harvesting module installed in the zero-power terminal can collect the energy carried by the radio wave in the space (the radio wave emitted by the reader is shown in Figure 2), which is used to drive the low-power computing module and the zero-power terminal Enables backscatter communication.
  • the zero-power consumption terminal After the zero-power consumption terminal obtains energy, it can receive the control command of the reader and send data to the reader based on the backscattering method based on the control signaling.
  • the sent data may come from the data stored by the zero-power terminal itself (such as an identity or pre-written information, such as the production date, brand, manufacturer, etc. of the commodity).
  • the zero-power terminal can also be loaded with various sensors, so as to report the data collected by various sensors based on the zero-power mechanism.
  • the zero-power device receives the carrier signal sent by the backscatter reader, and collects energy through the RF energy harvesting module. Furthermore, the low power consumption processing module (logic processing module in FIG. 3 ) is functioned to modulate the incoming wave signal and perform backscattering.
  • the terminal does not actively transmit signals, and realizes backscatter communication by modulating the incoming wave signal
  • the terminal does not rely on traditional active power amplifier transmitters, and uses low-power computing units at the same time, which greatly reduces hardware complexity;
  • the RF module is used to realize the collection of space electromagnetic wave energy through electromagnetic induction, and then realize the drive of the load circuit (low power consumption calculation, sensor, etc.), which can realize battery-free.
  • Load modulation is a method often used by electronic tags to transmit data to readers. Load modulation adjusts the electrical parameters of the electronic tag oscillation circuit according to the beat of the data flow, so that the size and phase of the electronic tag impedance change accordingly, thus completing the modulation process.
  • load modulation techniques There are mainly two types of load modulation techniques: resistive load modulation and capacitive load modulation.
  • resistive load modulation a resistor is connected in parallel with the load, which is called a load modulation resistor.
  • the resistor is turned on and off according to the clock of the data flow, and the on-off of the switch S is controlled by binary data code.
  • the circuit schematic diagram of resistive load modulation is shown in Fig. 5.
  • a capacitor is connected in parallel to the load, replacing the load modulating resistor in Figure 5 controlled by a binary data code.
  • RFID systems typically use one of the following encoding methods: reverse non-return-to-zero (NRZ) encoding, Manchester encoding, unipolar return-to-zero (Unipolar RZ) encoding, differential biphase (DBP) encoding, Miller coding and differential coding. In layman's terms, it is to use different pulse signals to represent 0 and 1.
  • NRZ reverse non-return-to-zero
  • Manchester encoding Manchester encoding
  • unipolar return-to-zero (Unipolar RZ) encoding unipolar return-to-zero
  • DBP differential biphase
  • the radio waves used for power supply can be low frequency, medium frequency, high frequency, etc.
  • the radio waves used for power supply can be sine waves, square waves, triangle waves, pulses, rectangular waves, etc.;
  • it can be a continuous wave or a non-continuous wave (that is, a certain time interruption is allowed);
  • the power supply may be a signal specified in the 3rd Generation Partnership Project (3GPP) standard.
  • 3GPP 3rd Generation Partnership Project
  • Sounding reference signal Sounding Reference Signal
  • PUSCH Physical Uplink Shared Channel
  • PRACH Physical Random Access Channel
  • PUCCH Physical Uplink Control Channel
  • PUCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • PBCH Physical Broadcast Channel
  • From the energy supply signal carrier it can be a base station, smart phone, smart gateway, etc.;
  • the radio waves used for power supply can be low frequency, medium frequency, high frequency, etc.
  • the radio waves used for power supply can be sine waves, square waves, triangle waves, pulses, rectangular waves, etc.;
  • it can be a continuous wave or a non-continuous wave (that is, a certain time interruption is allowed)
  • the trigger signal may be a certain signal specified in the 3GPP standard. For example, SRS, PUSCH, PRACH, PUCCH, PDCCH, PDSCH, PBCH, etc.; it may also be a new signal.
  • passive IoT devices With the increase of 5G industry applications, there are more and more types and application scenarios of connected objects, and there will be higher requirements for the price and power consumption of communication terminals.
  • the application of battery-free and low-cost passive IoT devices has become a The key technology for networking, enriching the types and quantities of 5G network link terminals, and truly realizing the Internet of Everything.
  • passive IoT devices can be based on existing zero-power devices, such as RFID technology, and extended on this basis to apply to cellular IoT.
  • zero-power terminals can be divided into the following types:
  • the zero-power terminal does not need a built-in battery.
  • the zero-power terminal When the zero-power terminal is close to a network device (such as a reader of an RFID system), the zero-power terminal is within the near-field range formed by the antenna radiation of the network device. Therefore, the antenna of the zero-power terminal generates an induced current through electromagnetic induction, and the induced current drives the low-power chip circuit of the zero-power terminal. Realize the demodulation of the forward link signal and the signal modulation of the backward link. For the backscatter link, the zero-power terminal uses the backscatter implementation to transmit signals.
  • the passive zero-power terminal does not need a built-in battery to drive it, whether it is a forward link or a reverse link, and is a real zero-power terminal.
  • Passive zero-power terminals do not require batteries, and the RF circuit and baseband circuit are very simple, such as low-noise amplifier (LNA), power amplifier (PA), crystal oscillator, and analog-to-digital converter (Analog-to-Digital Converter, ADC). And other devices, so it has many advantages such as small size, light weight, very cheap price, and long service life.
  • LNA low-noise amplifier
  • PA power amplifier
  • ADC analog-to-digital converter
  • the semi-passive zero-power terminal itself does not install a conventional battery, but it can use the RF energy harvesting module to collect radio wave energy, and store the collected energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can drive the low-power chip circuit of the zero-power terminal. Realize the demodulation of the forward link signal and the signal modulation of the backward link. For the backscatter link, the zero-power terminal uses the backscatter implementation to transmit signals.
  • the semi-passive zero-power terminal does not need a built-in battery to drive either the forward link or the reverse link.
  • the energy stored in the capacitor is used in the work, the energy comes from the radio collected by the energy harvesting module. Energy, so it is also a true zero-power terminal.
  • Semi-passive zero-power terminals inherit many advantages of passive zero-power terminals, so they have many advantages such as small size, light weight, very cheap price, and long service life.
  • the zero-power consumption terminal used in some scenarios can also be an active zero-power consumption terminal, and this type of terminal can have a built-in battery.
  • the battery is used to drive the low-power chip circuit of the zero-power terminal. Realize the demodulation of the forward link signal and the signal modulation of the backward link. But for the backscatter link, the zero-power terminal uses the backscatter implementation to transmit the signal. Therefore, the zero power consumption of this type of terminal is mainly reflected in the fact that the signal transmission of the reverse link does not require the power of the terminal itself, but uses backscattering.
  • Active zero-power consumption terminal built-in battery powers the RFID chip to increase the reading and writing distance of the tag and improve the reliability of communication. Therefore, it can be applied in some scenarios that require relatively high communication distance and read delay.
  • RFID anti-collision algorithm is mainly based on Tridiagonal Matrices (TDMA) algorithm, which can be divided into ALOHA anti-collision algorithm and binary search algorithm.
  • TDMA Tridiagonal Matrices
  • the anti-collision algorithm can make the throughput rate of the system and the utilization rate of the channel higher, require fewer time slots, and have higher data accuracy.
  • zero-power terminals In zero-power communication, zero-power terminals need to collect radio waves sent by network nodes to obtain energy before driving themselves to work. With the development of the industry, the number of devices connected to the network will increase sharply, and the number of zero-power devices applied in the cellular system will also be huge. Therefore, in the case of zero-power communication in the cellular network, the probability of collision will be higher.
  • the existing anti-collision mechanism cannot fully match the business requirements. It is necessary to introduce a new anti-collision solution mechanism in the zero-power communication of the cellular network.
  • this application proposes a zero-power terminal initial transmission and retransmission scheme.
  • the zero-power terminal can determine the uplink channel and/or time-frequency resource set for initial transmission and retransmission, thereby improving the performance of the terminal device. Backscatter transmission performance.
  • FIG. 6 is a schematic flowchart of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG. 6, the wireless communication method 200 may include at least part of the following content:
  • the terminal device determines an uplink channel used for multiple transmissions of target backscatter signals, and/or the terminal device determines a set of time-frequency resources used for multiple times of transmission of target backscatter signals.
  • multiple transmissions may refer to an initial transmission and at least one retransmission.
  • the terminal device is a device that does not actively transmit signals and uses signals sent by network devices or other devices to carry information, for example, a zero-power consumption terminal.
  • the embodiments of the present application can be applied to a cellular Internet of Things system, such as a cellular passive Internet of Things system, or can also be applied to other scenarios where a terminal device sends information to a network device through zero-power communication or battery-free communication. Not limited to this.
  • the zero-power communication method may include the backscatter communication method, or may also include other methods introduced in the standard evolution for the zero-power terminal to communicate.
  • the terminal device communicates with the Communication between network devices is taken as an example for illustration, but the present application is not limited thereto.
  • the capability collection module of the terminal device may support broadband reception, that is, the terminal device may receive wireless signals within a relatively wide bandwidth range and perform energy collection. In this way, when the network device transmits a downlink signal within the bandwidth supported by the terminal device, the terminal device can collect energy to obtain energy, and activate the internal chip circuit of the terminal device based on the obtained energy to enter the "activated" state.
  • the terminal device after the terminal device enters the "active" state, it can receive the downlink signal (or forward link signal) sent by the network device.
  • the channel bandwidth for data communication of the terminal device is usually limited, for example, the channel The bandwidth is 200KHz.
  • the terminal device needs to determine the target downlink channel for receiving the downlink signal, so as to receive the downlink signal sent by the network device and obtain the downlink information sent by the network device.
  • zero-power devices are not powered by batteries
  • base stations or dedicated energy supply nodes or other intelligent terminal devices need to provide energy supply signals for zero-power devices to obtain energy for corresponding communication processes. Since the energy of the energy supply signal will increase and attenuate with the distance, when different zero-power consumption devices receive the energy supply signal, the signal strength of the energy supply signal is different, which will also cause different zero-power consumption devices to perform energy collection. The time is different. In particular, there is a type of zero-power terminal. Because the strength of the received energy supply signal is very low, it takes a long time to communicate. For this type of zero-power terminal, a collision will have a greater impact .
  • an uplink (uplink, UL) channel is a channel used for backscatter communication by a zero-power terminal.
  • the number of uplink channels used in zero-power communication is related to the specific modulation method. If amplitude shift keying (Amplitude Shift Keying, ASK) or phase shift keying (phase-shift keying, PSK) modulation is used, the uplink channel only needs to occupy one channel. However, if the frequency-shift keying (FSK) modulation method is used, the terminal may generate backscattered signals at two frequency positions, and the two frequency positions are related to the backscattered signals sent by the network for the terminal The channel occupied by the downlink signal is symmetrical.
  • the uplink channel is two symmetrical channels (Channel, CH), and we call it a group or a pair of uplink channels (Channel, CH) at this time, as shown in FIG. 7 .
  • the terminal device determines the uplink channel used to transmit the target backscatter signal multiple times from the preset M uplink channels used for backscatter communication, M is a positive integer, and M ⁇ 2 .
  • the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times from the M uplink channels according to a first preset rule.
  • the first preset rule includes but is not limited to one of the following:
  • the order of the frequency of the uplink channel from low to high the order of the frequency of the uplink channel from high to low, and the corresponding relationship between the uplink channel and the number of transmissions.
  • the terminal device determines that the uplink channel with the lowest frequency among the M uplink channels is used to initially transmit the target backscatter signal, And based on the sequence of frequencies of the uplink channels from low to high, sequentially select uplink channels for retransmitting the target backscatter signal.
  • the terminal device determines that the uplink channel with the highest frequency among the M uplink channels is used to initially transmit the target backscatter signal , and based on the order of the frequencies of the uplink channels from high to low, sequentially select uplink channels for retransmitting the target backscatter signal.
  • the terminal device determines an uplink channel for transmitting the target backscatter signal multiple times based on the correspondence.
  • multiple terminal devices use a same uplink channel among the M uplink channels as an uplink channel for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the multiple terminal devices respectively use different time-frequency resource sets on the same uplink channel among the M uplink channels as the time-frequency resource sets for initially transmitting the backscatter signal.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is pre-configured or agreed by the agreement, or, among the M uplink channels, the target backscatter signal is used
  • the uplink channel of the initial transmission is indicated by the network device.
  • the uplink channel may be called a back scattering channel (Back Scattering Channel, BSCH).
  • BSCH Back Scattering Channel
  • the BSCH whose channel ID is i among the M BSCHs is used for the i-th transmission of the backscattered signal.
  • BSCH 1 can be used as the first retransmission channel.
  • Backscatter communication is performed on BSCH 1; if a collision still occurs, or the base station cannot decode correctly, the backscatter signal needs to be sent again.
  • BSCH 2 can be used as the second retransmission channel.
  • BSCH 2 The retransmission of the second backscatter signal is carried out on the BSCH, and so on, as shown in Figure 8.
  • Figure 8 is an example of the transmission of the backscatter signal on a BSCH.
  • BSCH 0, BSCH 1, etc. are a group of symmetrical channels, and the related descriptions are similar, so I won’t repeat them here.
  • the uplink channel whose channel identifier is i+k among the M uplink channels is used for the i-th transmission of the target backscatter signal, and i is an integer , k is a positive integer, and i ⁇ 0, i+k ⁇ M-1;
  • the uplink channel whose channel identifier is k among the M uplink channels is used for the initial transmission of the target backscatter signal;
  • the uplink channel whose channel identifier is i+k among the M uplink channels is used for the ith retransmission of the target backscatter signal.
  • multiple terminal devices use different uplink channels among the M uplink channels as uplink channels for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is indicated by the network device; or, the initial transmission of the target backscatter signal among the M uplink channels
  • the uploaded uplink channel is determined for the terminal device.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is determined by the terminal device as a result of taking a modulo on M according to some bits in the identifier of the terminal device; or ,
  • the uplink channel used for the initial transmission of the target backscatter signal is determined by the terminal device according to the signal strength of the received power supply signal and/or trigger signal; or,
  • the uplink channel used for the initial transmission of the target backscatter signal is determined by the terminal device according to the charging time of itself.
  • the uplink channel identified as j among the M uplink channels is used for the ith transmission of the target backscatter signal, and the uplink channel identified as j+t among the M uplink channels
  • the channel is used for the i+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i ⁇ 0, 0 ⁇ j+t ⁇ M-1.
  • FIG. 9 is an example of backscattered signal transmission on an uplink channel. If FSK modulation is used and the terminal does not perform filtering processing, then BSCH 0, BSCH 1, etc. are a set of symmetrical uplink channels .
  • the zero-power terminal performs the initial transmission of the backscatter signal on BSCH 1. When a collision occurs or the base station fails to decode and needs to be retransmitted, the first retransmission of the backscatter signal is performed on BSCH 3. If there is another collision or When the base station fails to decode and needs to retransmit again, the zero-power terminal will perform the second retransmission of the backscattered signal on BSCH 5.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is an uplink channel with an average usage rate lower than the first threshold, or, the M The uplink channel used for the initial transmission of the target backscatter signal among the uplink channels is an uplink channel among at least one uplink channel used for the edge user among the M uplink channels.
  • an uplink channel among the M uplink channels allows at least one transmission of the target backscatter signal.
  • the maximum number of transmissions supported by each of the M uplink channels is pre-configured or agreed by the protocol, or, the maximum number of transmissions supported by each of the M uplink channels is configured by the network device of.
  • the terminal device can perform the initial transmission and the first retransmission on BSCH 0, and the second and third retransmission on BSCH 1.
  • each of the M uplink channels allows multiple transmissions of the target backscatter signal, it is allowed to superimpose the anti-collision processing algorithm on each of the uplink channels.
  • each uplink channel is based on dynamic ALOHA, or anti-collision algorithms such as time slot ALOHA.
  • different uplink channels among the M uplink channels are overlapped using an anti-collision processing algorithm.
  • the anti-collision processing algorithm used by the uplink channel among the M uplink channels is indicated by the network device, or, the anti-collision processing algorithm used by the uplink channel among the M uplink channels is pre-configured or As stipulated in the agreement, or, the anti-collision processing algorithm used by the uplink channel among the M uplink channels is a fixed anti-collision algorithm.
  • the terminal device when the target backscatter signal needs to be retransmitted after using the uplink channel with the largest channel ID among the M uplink channels, the terminal device continues to use the uplink channel with the largest channel ID among the M uplink channels.
  • the uplink channel retransmits the target backscatter signal. That is, after using the preset uplink channel with the largest channel identifier, if a collision still occurs or the base station fails to decode and needs to retransmit again, and there is no other channel with a larger identifier to switch to, continue to use the uplink channel with the largest identifier. channel.
  • the bandwidth of each uplink channel in the M uplink channels is equal; or,
  • the bandwidths of each uplink channel in the M uplink channels are not equal; or,
  • Part of the uplink channels in the M uplink channels have different bandwidths.
  • the bandwidth of the uplink channel used for the Pth transmission of the target backscatter signal is less than or equal to the bandwidth of the uplink channel used for the Qth transmission of the target backscatter signal, where P and Q is a positive integer, and P>Q.
  • the terminal device uses the switched uplink channel to transmit the target backscatter signal after the first time domain offset. This reduces the probability of collisions.
  • the first time domain offset is preconfigured or agreed upon by the protocol; or, the first time domain offset is configured by the network device; or, the first time domain offset is configured by the network device A time domain offset randomly selected from the S time domain offsets, where S is a positive integer; or, in the case where the network device is configured with S time domain offsets, the first time domain offset is the first time domain offset for the terminal device according to Some bits in the identifier of the terminal device are determined by the result of modulo S, where S is a positive integer.
  • each of the M uplink channels is continuous in the frequency domain, or, each of the M uplink channels is not continuous in the frequency domain.
  • the terminal device when the signal strength of the terminal device is lower than a preset threshold, or the charging time of the terminal device is higher than a preset threshold, it is determined that the terminal device is an edge device.
  • the terminal device determines a set of time-frequency resources for transmitting the target backscatter signal multiple times from preset N time-frequency resource sets used for backscatter communication, where N is a positive integer, And N ⁇ 2.
  • the N time-frequency resource sets are preset time-frequency resource sets on at least one uplink channel for backscatter communication.
  • the numbers of time-frequency resource sets on different uplink channels in the at least one uplink channel are the same, or the numbers of time-frequency resource sets on different uplink channels in the at least one uplink channel are different.
  • multiple terminal devices use a same time-frequency resource set in the N time-frequency resource sets as a time-frequency resource set for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is pre-configured or agreed by the agreement, or, the N time-frequency resource sets are used for The initially transmitted time-frequency resource set of the target backscatter signal is indicated by the network device.
  • the time-frequency resource set whose time-frequency resource set index is i in the N time-frequency resource sets is used for the i-th transmission of the target backscatter signal, i is an integer, and 0 ⁇ i ⁇ N-1;
  • the time-frequency resource set whose time-frequency resource set index is i in the N time-frequency resource sets is used for the initial transmission of the target backscatter signal; when i ⁇ 1, the N The time-frequency resource set whose time-frequency resource set index is i in the time-frequency resource set is used for the ith retransmission of the target backscatter signal.
  • time-frequency resource set 1 can be used as the time-frequency resource set for the first retransmission, and reverse Scatter communication; if a collision still occurs, or the base station cannot decode correctly, the backscatter signal needs to be sent again.
  • time-frequency resource set 2 can be used as the time-frequency resource set for the second retransmission.
  • the second retransmission of the backscattered signal is performed on the time-frequency resource set, and so on, as shown in FIG. 10 (here, the time-frequency resource set is divided into equal parts as an example).
  • the time-frequency resource set whose time-frequency resource set index is i+k in the N time-frequency resource sets is used for the target backscatter signal i transmission, i is an integer, k is a positive integer, and i ⁇ 0, i+k ⁇ N-1;
  • the time-frequency resource set whose time-frequency resource set index is k in the N time-frequency resource sets is used for the initial transmission of the target backscatter signal; when i ⁇ 1, the N The time-frequency resource set whose time-frequency resource set index is i+k in the time-frequency resource set is used for the ith retransmission of the target backscattered signal.
  • multiple terminal devices use different time-frequency resource sets in the N time-frequency resource sets as time-frequency resource sets for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is indicated by the network device; or, the N time-frequency resource set used for the target The set of time-frequency resources for initial transmission of the backscattered signal is determined for the terminal device.
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is the result of taking a modulus of N by the terminal device according to some bits in the identifier of the terminal device determined; or,
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal device according to the signal strength of the received power supply signal and/or trigger signal; or,
  • the time-frequency resource set used for the initial transmission of the target backscatter signal is determined by the terminal device according to the length of its own charging time.
  • the time-frequency resource set whose time-frequency resource set index is j in the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, and in the N time-frequency resource sets
  • the time-frequency resource set whose index is j+t is used for the i+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i ⁇ 0, 0 ⁇ j+t ⁇ N-1.
  • FIG. 11 is an example of equal division of a time-frequency resource set used for backscatter signal transmission.
  • the zero-power device performs the initial transmission of the backscatter signal on the time-frequency resource set 0.
  • the first retransmission of the backscatter signal is performed on the time-frequency resource set 3.
  • the zero-power device will perform the second retransmission of the backscattered signal on the time-frequency resource set 5.
  • the average usage rate of the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is lower than the second threshold or, the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is at least one time-frequency resource set used for edge users in the N time-frequency resource sets A set of time-frequency resources in the resource set.
  • the time-frequency resource set in the N time-frequency resource sets allows at least one transmission of the target backscatter signal.
  • the maximum number of transmissions supported by each time-frequency resource set in the N time-frequency resource sets is pre-configured or agreed by the agreement, or, each time-frequency resource set in the N time-frequency resource sets supports The maximum number of transfers configured for the network device.
  • each time-frequency resource set in the N time-frequency resource sets allows multiple transmissions of the target backscatter signal, it is allowed to superimpose on each time-frequency resource set Anti-collision processing algorithm.
  • different time-frequency resource sets in the N time-frequency resource sets are overlapped using an anti-collision processing algorithm.
  • the anti-collision processing algorithm used by the time-frequency resource set in the N time-frequency resource sets is indicated by the network device, or, the time-frequency resource set in the N time-frequency resource sets uses
  • the anti-collision processing algorithm is pre-configured or stipulated in the protocol, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is a fixed anti-collision algorithm.
  • the terminal device when the target backscatter signal needs to be retransmitted after using the time-frequency resource set with the largest time-frequency resource set index among the N time-frequency resource sets, the terminal device continues to use the N time-frequency resource sets The time-frequency resource set with the largest time-frequency resource set index among the time-frequency resource sets retransmits the target backscatter signal.
  • the resources occupied by each time-frequency resource set in the N time-frequency resource sets are equally divided; or,
  • the resources occupied by each time-frequency resource set in the N time-frequency resource sets are not equally divided.
  • the resources occupied by the time-frequency resource set with index p are smaller than the time-frequency resource set with index q. resources occupied by the frequency resource set, where p and q are positive integers, and p>q.
  • the resources occupied by the time-frequency resource sets in the N time-frequency resource sets vary with The index increases and gradually decreases. For example, any i>j has resources occupied by time-frequency resource set j ⁇ resources occupied by time-frequency resource set i.
  • the resources occupied by the time-frequency resource sets in the N time-frequency resource sets vary with The index increases and decreases stepwise.
  • the terminal device transmits the target backscatter signal using the switched time-frequency resource set after the second time domain offset. scattered signal.
  • the second time domain offset is preconfigured or agreed upon by the protocol; or, the second time domain offset is configured by the network device; or, the second time domain offset is configured by the network device A time domain offset randomly selected from the S time domain offsets, S is a positive integer; or, in the case where the network device is configured with S time domain offsets, the second time domain offset is the terminal device according to Some bits in the identifier of the terminal device are determined by the result of modulo S, where S is a positive integer.
  • each time-frequency resource set in the N time-frequency resource sets is continuous in the frequency domain, or, each time-frequency resource set in the N time-frequency resource sets is not continuous in the frequency domain.
  • the terminal device after transmitting the target backscatter signal for the R time, performs the R+1th transmission of the target backscatter signal after the third time domain offset, where R is a positive integer.
  • the third time domain offset is preconfigured or agreed upon by the protocol; or, the third time domain offset is configured by the network device; or, the third time domain offset is configured by the network device A time domain offset randomly selected from the S time domain offsets, S is a positive integer; or, in the case where the network device is configured with S time domain offsets, the third time domain offset is the terminal device according to Some bits in the identifier of the terminal device are determined by the result of modulo S, where S is a positive integer.
  • the time-frequency resource set may be as shown in FIG. 12 and FIG. 13 .
  • FIG. 12 and FIG. 13 are only examples, and do not limit the number and size of time-frequency resource sets.
  • the terminal device determines the uplink channel for transmitting the target backscatter signal multiple times, and/or the terminal device determines the time-frequency resource set for transmitting the target backscatter signal multiple times, so that It can improve the backscatter transmission performance of the terminal equipment and reduce the probability of collision with other terminal equipment in multiple transmissions.
  • Fig. 14 shows a schematic block diagram of a terminal device 300 according to an embodiment of the present application.
  • the terminal device 300 includes: a processing unit 310, wherein,
  • the processing unit 310 is configured to determine an uplink channel for multiple transmissions of target backscatter signals, and/or, the processing unit 310 is configured to determine a set of time-frequency resources for multiple transmissions of target backscatter signals.
  • the processing unit 310 is specifically used for:
  • the uplink channel used to transmit the target backscatter signal multiple times is determined from M preset uplink channels used for backscatter communication, M is a positive integer, and M ⁇ 2.
  • the processing unit 310 is specifically used for:
  • an uplink channel used to transmit the target backscatter signal multiple times is determined from the M uplink channels.
  • the first preset rule includes one of the following:
  • the order of the frequency of the uplink channel from low to high the order of the frequency of the uplink channel from high to low, and the corresponding relationship between the uplink channel and the number of transmissions.
  • multiple terminal devices use a same uplink channel among the M uplink channels as an uplink channel for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the multiple terminal devices respectively use different time-frequency resource sets on the same uplink channel among the M uplink channels as the time-frequency resource sets for initially transmitting the backscatter signal.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is pre-configured or agreed by the agreement, or, among the M uplink channels, the target backscatter signal is used
  • the uplink channel of the initial transmission is indicated by the network device.
  • the uplink channel identified as i among the M uplink channels is used for the ith transmission of the target backscatter signal, i is an integer, and 0 ⁇ i ⁇ M-1;
  • the uplink channel whose channel ID is i among the M uplink channels is used for the initial transmission of the target backscatter signal; when i ⁇ 1, the channel ID among the M uplink channels is i
  • the uplink channel is used for the ith retransmission of the target backscatter signal.
  • the uplink channel whose channel identifier is i+k among the M uplink channels is used for the i-th transmission of the target backscatter signal, and i is an integer , k is a positive integer, and i ⁇ 0, i+k ⁇ M-1;
  • the uplink channel whose channel identifier is k among the M uplink channels is used for the initial transmission of the target backscatter signal;
  • the uplink channel whose channel identifier is i+k among the M uplink channels is used for the ith retransmission of the target backscatter signal.
  • multiple terminal devices use different uplink channels among the M uplink channels as uplink channels for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is indicated by the network device; or, the initial transmission of the target backscatter signal among the M uplink channels
  • the uploaded uplink channel is determined for the terminal device.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is determined by the terminal device as a result of taking a modulo on M according to some bits in the identifier of the terminal device; or , among the M uplink channels, the uplink channel used for the initial transmission of the target backscatter signal is determined by the terminal device according to the signal strength of the received energy supply signal and/or trigger signal; or, the M uplink channels
  • the uplink channel used for the initial transmission of the target backscatter signal is determined by the terminal device according to the charging time of itself.
  • the uplink channel whose channel identifier is j among the M uplink channels is used for the ith transmission of the target backscatter signal, and the channel identifier among the M uplink channels is the uplink channel of j+t
  • the channel is used for the i+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i ⁇ 0, 0 ⁇ j+t ⁇ M-1.
  • the uplink channel used for the initial transmission of the target backscatter signal among the M uplink channels is an uplink channel whose average usage rate is lower than the first threshold
  • the uplink channel used for initial transmission of the target backscatter signal among the M uplink channels is an uplink channel among at least one uplink channel used for edge users among the M uplink channels.
  • an uplink channel among the M uplink channels allows at least one transmission of the target backscatter signal.
  • the maximum number of transmissions supported by each of the M uplink channels is pre-configured or agreed by the protocol, or, the maximum number of transmissions supported by each of the M uplink channels is configured by the network device of.
  • each of the M uplink channels allows multiple transmissions of the target backscatter signal, it is allowed to superimpose the anti-collision processing algorithm on each of the uplink channels.
  • different uplink channels among the M uplink channels are overlapped using an anti-collision processing algorithm.
  • the anti-collision processing algorithm used by the uplink channel among the M uplink channels is indicated by the network device, or, the anti-collision processing algorithm used by the uplink channel among the M uplink channels is pre-configured or As stipulated in the agreement, or, the anti-collision processing algorithm used by the uplink channel among the M uplink channels is a fixed anti-collision algorithm.
  • the terminal device 300 further includes: a communication unit 320, wherein,
  • the communication unit 320 is configured to continue to use the uplink channel with the largest channel ID among the M uplink channels to retransmit Send the target backscatter signal.
  • the bandwidth of each uplink channel in the M uplink channels is equal; or,
  • the bandwidths of each uplink channel in the M uplink channels are not equal; or,
  • Part of the uplink channels in the M uplink channels have different bandwidths.
  • the bandwidth of the uplink channel used for the Pth transmission of the target backscatter signal is less than or equal to the bandwidth of the uplink channel used for the Qth transmission of the target backscatter signal, where P and Q is a positive integer, and P>Q.
  • the terminal device 300 further includes: a communication unit 320, wherein,
  • the communication unit is configured to use the switched uplink channel to transmit the target backscatter signal after the first time domain offset.
  • the first time domain offset is preconfigured or agreed upon by the protocol; or, the first time domain offset is configured by the network device; or, the first time domain offset is configured by the network device A time domain offset randomly selected from the S time domain offsets, where S is a positive integer; or, in the case where the network device is configured with S time domain offsets, the first time domain offset is the first time domain offset for the terminal device according to Some bits in the identifier of the terminal device are determined by the result of modulo S, where S is a positive integer.
  • each of the M uplink channels is continuous in the frequency domain, or, each of the M uplink channels is not continuous in the frequency domain.
  • the processing unit 310 is specifically used for:
  • a set of time-frequency resources used to transmit the target backscatter signal multiple times is determined from preset N time-frequency resource sets used for backscatter communication, where N is a positive integer and N ⁇ 2.
  • the N time-frequency resource sets are preset time-frequency resource sets on at least one uplink channel for backscatter communication.
  • the numbers of time-frequency resource sets on different uplink channels in the at least one uplink channel are the same, or the numbers of time-frequency resource sets on different uplink channels in the at least one uplink channel are different.
  • multiple terminal devices use a same time-frequency resource set in the N time-frequency resource sets as a time-frequency resource set for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is pre-configured or agreed by the agreement, or, the N time-frequency resource sets are used for The initially transmitted time-frequency resource set of the target backscatter signal is indicated by the network device.
  • the time-frequency resource set whose time-frequency resource set index is i in the N time-frequency resource sets is used for the i-th transmission of the target backscatter signal, i is an integer, and 0 ⁇ i ⁇ N-1;
  • the time-frequency resource set whose time-frequency resource set index is i in the N time-frequency resource sets is used for the initial transmission of the target backscatter signal; when i ⁇ 1, the N The time-frequency resource set whose time-frequency resource set index is i in the time-frequency resource set is used for the ith retransmission of the target backscatter signal.
  • the time-frequency resource set whose time-frequency resource set index is i+k in the N time-frequency resource sets is used for the target backscatter signal i transmission, i is an integer, k is a positive integer, and i ⁇ 0, i+k ⁇ N-1;
  • the time-frequency resource set whose time-frequency resource set index is k in the N time-frequency resource sets is used for the initial transmission of the target backscatter signal; when i ⁇ 1, the N The time-frequency resource set whose time-frequency resource set index is i+k in the time-frequency resource set is used for the ith retransmission of the target backscattered signal.
  • multiple terminal devices use different time-frequency resource sets in the N time-frequency resource sets as time-frequency resource sets for initially transmitting the backscatter signal, and the multiple terminal devices include the terminal device.
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is indicated by the network device; or, the N time-frequency resource set used for the target The set of time-frequency resources for initial transmission of the backscattered signal is determined for the terminal device.
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is the result of taking a modulus of N by the terminal device according to some bits in the identifier of the terminal device determined; or,
  • the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is determined by the terminal device according to the signal strength of the received power supply signal and/or trigger signal; or,
  • the time-frequency resource set used for the initial transmission of the target backscatter signal is determined by the terminal device according to the length of its own charging time.
  • the time-frequency resource set whose time-frequency resource set index is j in the N time-frequency resource sets is used for the ith transmission of the target backscatter signal, and in the N time-frequency resource sets
  • the time-frequency resource set whose index is j+t is used for the i+1th transmission of the target backscatter signal, i is an integer, t is a positive integer, and i ⁇ 0, 0 ⁇ j+t ⁇ N-1.
  • the average usage rate of the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is lower than the second threshold or, the time-frequency resource set used for the initial transmission of the target backscatter signal in the N time-frequency resource sets is at least one time-frequency resource set used for edge users in the N time-frequency resource sets A set of time-frequency resources in the resource set.
  • the time-frequency resource set in the N time-frequency resource sets allows at least one transmission of the target backscatter signal.
  • the maximum number of transmissions supported by each time-frequency resource set in the N time-frequency resource sets is pre-configured or agreed by the agreement, or, each time-frequency resource set in the N time-frequency resource sets supports The maximum number of transfers configured for the network device.
  • each time-frequency resource set in the N time-frequency resource sets allows multiple transmissions of the target backscatter signal, it is allowed to superimpose on each time-frequency resource set Anti-collision processing algorithm.
  • different time-frequency resource sets in the N time-frequency resource sets are overlapped using an anti-collision processing algorithm.
  • the anti-collision processing algorithm used by the time-frequency resource set in the N time-frequency resource sets is indicated by the network device, or, the time-frequency resource set in the N time-frequency resource sets uses
  • the anti-collision processing algorithm is pre-configured or stipulated in the protocol, or the anti-collision processing algorithm used by the time-frequency resource sets in the N time-frequency resource sets is a fixed anti-collision algorithm.
  • the terminal device 300 further includes: a communication unit 320, wherein,
  • the communication unit 320 is configured to continue using the N time-frequency resources The time-frequency resource set with the largest time-frequency resource set index in the set retransmits the target backscatter signal.
  • the resources occupied by each time-frequency resource set in the N time-frequency resource sets are equally divided; or,
  • the resources occupied by each time-frequency resource set in the N time-frequency resource sets are not equally divided.
  • the resources occupied by the time-frequency resource set with index p are smaller than the time-frequency resource set with index q. resources occupied by the frequency resource set, where p and q are positive integers, and p>q; or,
  • the resources occupied by each time-frequency resource set in the N time-frequency resource sets are not equally divided, the resources occupied by the time-frequency resource sets in the N time-frequency resource sets gradually increase as the index increases. Decrease, or, resources occupied by the time-frequency resource sets in the N time-frequency resource sets decrease stepwise as the index increases.
  • the terminal device 300 further includes: a communication unit 320, wherein,
  • the communication unit 320 is configured to use the switched time-frequency resource set to transmit the target backscatter signal after the second time domain offset.
  • the second time domain offset is preconfigured or agreed upon by the protocol; or, the second time domain offset is configured by the network device; or, the second time domain offset is configured by the network device A time domain offset randomly selected from the S time domain offsets, S is a positive integer; or, in the case where the network device is configured with S time domain offsets, the second time domain offset is the terminal device according to Some bits in the identifier of the terminal device are determined by the result of modulo S, where S is a positive integer.
  • each time-frequency resource set in the N time-frequency resource sets is continuous in the frequency domain, or, each time-frequency resource set in the N time-frequency resource sets is not continuous in the frequency domain.
  • the terminal device 300 further includes: a communication unit 320, wherein,
  • the communication unit 320 After transmitting the target backscatter signal for the R time, the communication unit 320 is configured to perform the R+1th transmission of the target backscatter signal after the third time domain offset, where R is a positive integer.
  • the third time domain offset is preconfigured or agreed upon by the protocol; or, the third time domain offset is configured by the network device; or, the third time domain offset is configured by the network device A time domain offset randomly selected from the S time domain offsets, S is a positive integer; or, in the case where the network device is configured with S time domain offsets, the third time domain offset is the terminal device according to Some bits in the identifier of the terminal device are determined by the result of modulo S, where S is a positive integer.
  • the above-mentioned communication unit may be a communication interface or a transceiver, or an input-output interface of a communication chip or a system-on-chip.
  • the aforementioned processing unit may be one or more processors.
  • terminal device 300 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 300 are to realize the For the sake of brevity, the corresponding process of the terminal device in the shown wireless communication method 200 is not repeated here.
  • Fig. 15 is a schematic structural diagram of a communication device 400 provided by an embodiment of the present application.
  • the communication device 400 shown in FIG. 15 includes a processor 410, and the processor 410 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the communication device 400 may further include a memory 420 .
  • the processor 410 can invoke and run a computer program from the memory 420, so as to implement the method in the embodiment of the present application.
  • the memory 420 may be an independent device independent of the processor 410 , or may be integrated in the processor 410 .
  • the communication device 400 may further include a transceiver 430, and the processor 410 may control the transceiver 430 to communicate with other devices, specifically, to send information or data to other devices, or Receive messages or data from other devices.
  • the transceiver 430 may include a transmitter and a receiver.
  • the transceiver 430 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 400 may specifically be the network device of the embodiment of the present application, and the communication device 400 may implement the corresponding processes implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.
  • the communication device 400 may specifically be the terminal device in the embodiment of the present application, and the communication device 400 may implement the corresponding processes implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, the Let me repeat.
  • Fig. 16 is a schematic structural diagram of a device according to an embodiment of the present application.
  • the apparatus 500 shown in FIG. 16 includes a processor 510, and the processor 510 can call and run a computer program from a memory, so as to implement the method in the embodiment of the present application.
  • the device 500 may further include a memory 520 .
  • the processor 510 can invoke and run a computer program from the memory 520, so as to implement the method in the embodiment of the present application.
  • the memory 520 may be an independent device independent of the processor 510 , or may be integrated in the processor 510 .
  • the device 500 may further include an input interface 530 .
  • the processor 510 can control the input interface 530 to communicate with other devices or chips, specifically, can obtain information or data sent by other devices or chips.
  • the device 500 may further include an output interface 540 .
  • the processor 510 can control the output interface 540 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the device can be applied to the network device in the embodiments of the present application, and the device can implement the corresponding processes implemented by the network device in the methods of the embodiments of the present application. For the sake of brevity, details are not repeated here.
  • the device can be applied to the terminal device in the embodiment of the present application, and the device can implement the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, details are not repeated here.
  • the device mentioned in the embodiment of the present application may also be a chip.
  • it may be a system-on-a-chip, a system-on-a-chip, a system-on-a-chip, or a system-on-a-chip.
  • FIG. 17 is a schematic block diagram of a communication system 600 provided by an embodiment of the present application. As shown in FIG. 17 , the communication system 600 includes a terminal device 610 and a network device 620 .
  • the terminal device 610 can be used to realize the corresponding functions realized by the terminal device in the above method
  • the network device 620 can be used to realize the corresponding functions realized by the network device in the above method, for the sake of brevity, no longer repeat.
  • the processor in the embodiment of the present application may be an integrated circuit chip, which has a signal processing capability.
  • each step of the above-mentioned method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in the form of software.
  • the above-mentioned processor can be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application-specific integrated circuit (Application Specific Integrated Circuit, ASIC), an off-the-shelf programmable gate array (Field Programmable Gate Array, FPGA) or other available Program logic devices, discrete gate or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, and the like.
  • the steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register.
  • the storage medium is located in the memory, and the processor reads the information in the memory, and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiments of the present application may be a volatile memory or a nonvolatile memory, or may include both volatile and nonvolatile memories.
  • the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash.
  • the volatile memory can be Random Access Memory (RAM), which acts as external cache memory.
  • RAM Static Random Access Memory
  • SRAM Static Random Access Memory
  • DRAM Dynamic Random Access Memory
  • Synchronous Dynamic Random Access Memory Synchronous Dynamic Random Access Memory
  • SDRAM double data rate synchronous dynamic random access memory
  • Double Data Rate SDRAM, DDR SDRAM enhanced synchronous dynamic random access memory
  • Enhanced SDRAM, ESDRAM synchronous connection dynamic random access memory
  • Synchlink DRAM, SLDRAM Direct Memory Bus Random Access Memory
  • Direct Rambus RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be a static random access memory (static RAM, SRAM), a dynamic random access memory (dynamic RAM, DRAM), Synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection Dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is, the memory in the embodiments of the present application is intended to include, but not be limited to, these and any other suitable types of memory.
  • the embodiment of the present application also provides a computer-readable storage medium for storing computer programs.
  • the computer-readable storage medium can be applied to the network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the network device in each method of the embodiment of the present application. For the sake of brevity, I won't repeat them here.
  • the computer-readable storage medium can be applied to the terminal device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding process implemented by the terminal device in each method of the embodiment of the present application. For the sake of brevity, I won't repeat them here.
  • the embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the network device in the various methods of the embodiments of the present application. For brevity, This will not be repeated here.
  • the computer program product can be applied to the terminal device in the embodiments of the present application, and the computer program instructions cause the computer to execute the corresponding processes implemented by the terminal device in the methods of the embodiments of the present application.
  • the computer program instructions cause the computer to execute the corresponding processes implemented by the terminal device in the methods of the embodiments of the present application.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the network device in the embodiment of the present application, and when the computer program is run on the computer, the computer executes the corresponding process implemented by the network device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.
  • the computer program can be applied to the terminal device in the embodiment of the present application.
  • the computer program executes the corresponding process implemented by the terminal device in each method of the embodiment of the present application, For the sake of brevity, details are not repeated here.
  • the disclosed systems, devices and methods may be implemented in other ways.
  • the device embodiments described above are only illustrative.
  • the division of the units is only a logical function division. In actual implementation, there may be other division methods.
  • multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to realize the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
  • the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disc and other media that can store program codes. .

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Abstract

La présente invention concerne un procédé de communication sans fil et un dispositif terminal. Un terminal zéro consommation d'énergie peut déterminer un canal de liaison montante et/ou un ensemble de ressources temps-fréquence pour une transmission initiale et une retransmission, ce qui permet d'améliorer les performances de transmission de rétrodiffusion du dispositif terminal. Le procédé de communication sans fil comprend les étapes dans lesquelles : un dispositif terminal détermine un canal de liaison montante, qui est utilisé pour de multiples instances de transmission d'un signal de rétrodiffusion cible, et/ou, le dispositif terminal détermine un ensemble de ressources temps-fréquence, qui est utilisé pour de multiples instances de transmission du signal de rétrodiffusion cible (S210).
PCT/CN2021/108659 2021-07-27 2021-07-27 Procédé de communication sans fil et dispositif terminal WO2023004583A1 (fr)

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PCT/CN2021/108659 WO2023004583A1 (fr) 2021-07-27 2021-07-27 Procédé de communication sans fil et dispositif terminal
CN202180097234.0A CN117203639A (zh) 2021-07-27 2021-07-27 无线通信的方法和终端设备

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CN101772073A (zh) * 2009-01-05 2010-07-07 中兴通讯股份有限公司 基于时分双工系统的混合自动重传请求的实现方法和装置
CN103514464A (zh) * 2013-09-27 2014-01-15 中国电子科技集团公司第七研究所 一种基于多信道的rfid多标签读写识别方法及装置
CN1843002B (zh) * 2003-08-26 2016-05-11 皇家飞利浦电子股份有限公司 点到多点传输
CN105743621A (zh) * 2016-02-02 2016-07-06 北京邮电大学 基于极化码的harq信号发送、接收方法及装置
US20180032768A1 (en) * 2016-07-29 2018-02-01 University Of Massachusetts Systems and methods for asymmetric backscatter communications
WO2021064979A1 (fr) * 2019-10-04 2021-04-08 日本電信電話株式会社 Dispositif de commande, système de communication sans fil et procédé et programme de commande de communication.
WO2021137554A1 (fr) * 2019-12-30 2021-07-08 삼성전자 주식회사 Procédé et appareil de transmission ou de réception de canal de données et de commande de liaison montante dans un système de communication sans fil

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1843002B (zh) * 2003-08-26 2016-05-11 皇家飞利浦电子股份有限公司 点到多点传输
CN101772073A (zh) * 2009-01-05 2010-07-07 中兴通讯股份有限公司 基于时分双工系统的混合自动重传请求的实现方法和装置
CN103514464A (zh) * 2013-09-27 2014-01-15 中国电子科技集团公司第七研究所 一种基于多信道的rfid多标签读写识别方法及装置
CN105743621A (zh) * 2016-02-02 2016-07-06 北京邮电大学 基于极化码的harq信号发送、接收方法及装置
US20180032768A1 (en) * 2016-07-29 2018-02-01 University Of Massachusetts Systems and methods for asymmetric backscatter communications
WO2021064979A1 (fr) * 2019-10-04 2021-04-08 日本電信電話株式会社 Dispositif de commande, système de communication sans fil et procédé et programme de commande de communication.
WO2021137554A1 (fr) * 2019-12-30 2021-07-08 삼성전자 주식회사 Procédé et appareil de transmission ou de réception de canal de données et de commande de liaison montante dans un système de communication sans fil

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