WO2023137718A1 - 同步控制方法、终端设备、网络设备、芯片和存储介质 - Google Patents

同步控制方法、终端设备、网络设备、芯片和存储介质 Download PDF

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Publication number
WO2023137718A1
WO2023137718A1 PCT/CN2022/073276 CN2022073276W WO2023137718A1 WO 2023137718 A1 WO2023137718 A1 WO 2023137718A1 CN 2022073276 W CN2022073276 W CN 2022073276W WO 2023137718 A1 WO2023137718 A1 WO 2023137718A1
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WIPO (PCT)
Prior art keywords
signal
terminal device
uplink
sequence
information
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PCT/CN2022/073276
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English (en)
French (fr)
Inventor
左志松
崔胜江
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to EP22921159.4A priority Critical patent/EP4468647A4/en
Priority to CN202280088968.7A priority patent/CN118541946A/zh
Priority to PCT/CN2022/073276 priority patent/WO2023137718A1/zh
Publication of WO2023137718A1 publication Critical patent/WO2023137718A1/zh
Priority to US18/775,226 priority patent/US20240373376A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0035—Synchronisation arrangements detecting errors in frequency or phase
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/001—Synchronization between nodes

Definitions

  • the present application relates to the communication field, and more specifically, to a synchronization control method, terminal equipment, network equipment, chip, computer readable storage medium, computer program product, computer program and communication system.
  • timing accuracy of communication equipment directly affects the communication performance.
  • some terminal devices such as zero-power consumption terminals
  • have relatively simple clock circuits resulting in relatively large errors in timing and frequency. Need to consider how to improve timing accuracy.
  • embodiments of the present application provide a synchronization control method, terminal device, network device, chip, computer readable storage medium, computer program product, computer program and communication system, which can be used to solve the problem of timing adjustment.
  • This embodiment of the application provides a synchronization control method, including:
  • the terminal device receives the first downlink signal from the network device
  • the terminal device modulates the reflected signal of the first downlink signal to obtain a first uplink signal, and sends the first uplink signal to the network device; wherein, the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • This embodiment of the application provides a synchronization control method, including:
  • the network device sends a first downlink signal to the terminal device; wherein, the reflected signal of the first downlink signal is used for modulation to obtain a first uplink signal;
  • the network device receives a first uplink signal from the terminal device; wherein, the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • the embodiment of the present application also provides a terminal device, including:
  • a first receiving module configured to receive a first downlink signal from a network device
  • the first processing module is configured to modulate the reflected signal of the first downlink signal to obtain the first uplink signal
  • the first sending module is configured to send a first uplink signal to the network device; wherein, the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • the embodiment of the present application also provides a network device, including:
  • the second sending module is configured to send the first downlink signal to the terminal device; wherein, the reflected signal of the first downlink signal is used for modulation to obtain the first uplink signal;
  • the second receiving module is configured to receive a first uplink signal from a terminal device; wherein, the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • the embodiment of the present application also provides a terminal device, including: a processor and a memory, the memory is used to store a computer program, and the processor invokes and runs the computer program stored in the memory to execute the synchronization control method provided in any embodiment of the present application.
  • the embodiment of the present application also provides a network device, including: a processor and a memory, the memory is used to store a computer program, and the processor invokes and runs the computer program stored in the memory to execute the synchronization control method provided in any embodiment of the present application.
  • An embodiment of the present application also provides a chip, including: a processor, configured to invoke and run a computer program from a memory, so that a device equipped with the chip executes the synchronization control method provided in any embodiment of the present application.
  • An embodiment of the present application further provides a computer-readable storage medium for storing a computer program, wherein the computer program causes a computer to execute the synchronization control method provided in any embodiment of the present application.
  • An embodiment of the present application further provides a computer program product, including computer program instructions, wherein the computer program instructions cause a computer to execute the synchronization control method provided in any embodiment of the present application.
  • An embodiment of the present application further provides a computer program, which enables a computer to execute the synchronization control method provided in any embodiment of the present application.
  • An embodiment of the present application further provides a communication system, including a terminal device and a network device configured to execute the synchronization control method provided in any embodiment of the present application.
  • the terminal device performs uplink communication based on backscattering, wherein the reflected signal of the downlink signal sent by the network device is modulated to obtain an uplink signal carrying synchronization information, and the network device can obtain the timing error and/or frequency error of the terminal device based on the synchronization information. Therefore, the network device can correct or assist the terminal device to correct the timing and/or frequency error, improve the timing accuracy, and ensure that the terminal device and the network device send and receive information through accurate timing.
  • FIG. 1 is a schematic diagram of a communication system architecture according to an embodiment of the present application.
  • Fig. 2 is a schematic diagram of zero power consumption communication according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of backscatter communication according to an embodiment of the present application.
  • Fig. 4 is a schematic diagram of energy harvesting in an embodiment of the present application.
  • FIG. 5 is a schematic circuit diagram of resistive load modulation according to an embodiment of the present application.
  • FIG. 6A is a schematic diagram 1 of the error of the RC oscillator according to the embodiment of the present application.
  • FIG. 6B is a schematic diagram 2 of the error of the RC oscillator of the embodiment of the present application.
  • Fig. 7 is a schematic flowchart of a synchronization control method according to an embodiment of the present application.
  • Fig. 8 is a schematic flowchart of a synchronization control method according to another embodiment of the present application.
  • FIG. 9 is a schematic diagram of a scenario of a synchronization control method according to an embodiment of the present application.
  • FIG. 10 is a schematic diagram of a synchronization control method in Application Example 1 of the present application.
  • Fig. 11 is a schematic diagram of synchronization signal sequence modulation in an application example of the present application.
  • Fig. 12 is a schematic diagram of a synchronization control method in Application Example 2 of the present application.
  • Fig. 13 is a schematic structural block diagram of a terminal device according to an embodiment of the present application.
  • Fig. 14 is a schematic structural block diagram of a terminal device according to another embodiment of the present application.
  • Fig. 15 is a schematic structural block diagram of a network device according to an embodiment of the present application.
  • Fig. 16 is a schematic structural block diagram of a network device according to another embodiment of the present application.
  • Fig. 17 is a schematic block diagram of a communication device according to an embodiment of the present application.
  • Fig. 18 is a schematic block diagram of a chip according to an embodiment of the present application.
  • Fig. 19 is a schematic block diagram of a communication system according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Long term evolution
  • NR New Radio
  • NTN Non-Terrestrial Networks
  • UMTS Universal Mobile Telecommunications System
  • WLAN Wireless Local Area Networks
  • WiFi Wireless Fidelity
  • 5G 5th-Generation
  • the communication system in the embodiment of the present application may be applied to a carrier aggregation (Carrier Aggregation, CA) scenario, may also be applied to a dual connectivity (Dual Connectivity, DC) scenario, and may also be applied to an independent (Standalone, SA) network deployment scenario.
  • Carrier Aggregation, CA Carrier Aggregation
  • DC Dual Connectivity
  • SA independent network deployment scenario
  • 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 equipment, user terminal, terminal, wireless communication equipment, 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 equipment user terminal
  • terminal wireless communication equipment
  • user agent or user device wireless communication equipment
  • the terminal device can be a station (STAION, ST) in the WLAN, and can be 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 processing (Personal Digital Assistant, PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle device, a wearable device, a next-generation
  • STAION, ST in the WLAN
  • SIP Session Initiation Protocol
  • WLL Wireless Local Loop
  • PDA Personal Digital Assistant
  • the communication system is, for example, a terminal device in an NR network, or a terminal device in a public land mobile network (Public Land Mobile Network, PLMN) network that will evolve in the future.
  • 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 on airplanes, balloons, and satellites, etc.).
  • the terminal device may be a mobile phone (Mobile Phone), a tablet computer (Pad), a computer with wireless transceiver function, a virtual reality (Virtual Reality, VR) terminal device, an augmented reality (Augmented Reality, AR) terminal device, a wireless terminal device in industrial control (industrial control), a wireless terminal device in self driving, a wireless terminal device in remote medical (remote medical), a smart grid (smart g Rid), 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
  • AR Augmented Reality
  • wireless terminal device in industrial control industrial control
  • remote medical remote medical
  • smart grid smart grid
  • 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.
  • Wearable smart devices in a broad sense include full-featured, large-sized devices that do not rely on smartphones to achieve complete or partial functions, such as smart watches or smart glasses, etc., and only focus on a certain type of application function, and need to be used in conjunction with other devices such as smart phones, such as smart bracelets and smart jewelry for physical signs monitoring.
  • the network device may be a device for communicating with a mobile device such as an access network device.
  • the network device can 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 network device (gNB) in a vehicle-mounted device, a wearable device, and an NR network, or a future evolution Network equipment in the PLMN network, etc.
  • AP Access Point
  • BTS Base Transceiver Station
  • NodeB, NB base station
  • Evolutional Node B, eNB or eNodeB evolved base station
  • gNB network device
  • gNB network device
  • the network device may also be a core network device, such as a mobility management entity (Mobility Management Entity, MME), an access and mobility management function (Access and Mobility Management Function, AMF) and other network entities, which are not limited in this embodiment of the present application.
  • MME Mobility Management Entity
  • AMF Access and Mobility Management Function
  • 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 or a balloon station.
  • the satellite may be a low earth orbit (low earth orbit, LEO) satellite, a medium earth orbit (medium earth orbit, MEO) satellite, a geostationary earth orbit (geosynchronous earth orbit, GEO) satellite, a high elliptical orbit (High Elliptical Orbit, HEO) satellite, etc.
  • the network device may also be a base station installed on land, water, and 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.
  • the cell may be a cell corresponding to the network device (such as a base station), and the cell may belong to a macro base station or a base station corresponding to a small cell.
  • the small cells here may include: Metro cell, Micro cell, Pico cell, Femto cell to 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.
  • FIG. 1 schematically shows a wireless access system 1000 including one network device 1100 and two terminal devices 1200 .
  • the wireless communication system 1000 may include multiple network devices 1100, and the coverage of each network device 1100 may include other numbers of terminal devices.
  • 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 devices may include network devices and terminal devices with communication functions, and the network devices and terminal devices may be specific devices in the embodiments 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 may mean that A directly indicates B, for example, B can be obtained through A; it may also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it may also indicate that there is an association relationship between A and B.
  • 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, or configures and is configured.
  • a typical zero-power device is a radio frequency identification (Radio Frequency Identification, RFID) device, which is a technology that uses radio coupling at the transceiver end to realize non-contact automatic transmission and identification of label information. This includes short-distance inductive coupling and long-distance electromagnetic coupling.
  • RFID tags are also called "radio frequency tags" or “electronic tags”.
  • the types of electronic tags can be divided into active electronic tags, passive electronic tags and semi-passive electronic tags.
  • Active electronic tags also known as active electronic tags, refer to the energy provided by the built-in battery of the electronic tag. Different from the passive radio frequency activation method, the tag can actively send information in the set frequency band.
  • Passive electronic tags also known as passive electronic tags, do not support built-in batteries.
  • the electronic tag antenna in the near field formed by the radiation of the reader antenna generates an induced current through electromagnetic induction, and the induced current drives the chip circuit of the electronic tag.
  • 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 passive electronic tags such as small size, light weight, low price, and long service life.
  • the built-in battery only provides power for few circuits in the chip when there is no reader access.
  • the most basic RFID system is composed of electronic tags (TAG) and readers (Reader/Writer) two parts.
  • the electronic tag is composed of coupling components and chips, and each electronic tag has a unique electronic code, which is placed on the measured target to achieve the purpose of marking the target object.
  • the reader 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.
  • the electronic tag 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 decodes it to identify the electronic tag.
  • RFID is a typical zero-power communication.
  • This type of zero-power communication key technology includes energy harvesting, backscatter communication, and low-power computing.
  • 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 radio waves in space (the radio waves emitted by the reader are shown in Figure 2), which is used to drive the low-power computing module of the zero-power terminal and realize 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.
  • Zero-power communication Communication based on zero-power devices, referred to as zero-power communication, includes the following key technologies:
  • a zero-power device such as the backscatter tag in Figure 3 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 supplied with energy, and the incoming wave signal is modulated and backscattered.
  • 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 encoding, or differential encoding. 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
  • Miller encoding Miller encoding
  • differential encoding Miller encoding
  • passive IoT devices With the increase of 5G industry applications, there will be more and more types and application scenarios of connected objects in the Internet of Things, 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 key technology of cellular IoT, enriching the types and quantities of 5G network link terminals, and truly realizing the Internet of Everything.
  • passive IoT devices can be applied to cellular IoT based on existing zero-power consumption devices.
  • Subcarrier modulation refers to first modulating the signal on carrier 1, and then modulating another carrier 2 with a higher frequency based on the modulation result.
  • Subcarrier modulation is a modulation method often used in RFID systems.
  • the zero-power consumption terminals in the above-mentioned related technologies need to provide energy supply signals through network equipment (such as base stations, RFID readers, etc.) or other sources, so that the zero-power consumption terminals can obtain energy to drive circuits.
  • the clock is also provided in the zero power termination circuit. Considering the cost and power consumption, the clock circuit part of zero power consumption often adopts the simplified circuit of RC oscillator. The timing, frequency, phase and other errors of this circuit are relatively large.
  • FIG. 6A and FIG. 6B show schematic diagrams of timing signal errors of zero-power consumption terminals based on actual tests. The specific data are as follows:
  • the present application proposes to further control the error of the reflected signal through the network. Otherwise, the timing error and its accumulated value will cause the system to fail to communicate normally. At the same time, since the frequency of the signal reflected by the terminal is different from the frequency of the continuous wave supplied with energy, there is a lack of reference signal calibration.
  • Fig. 7 is a schematic flowchart of a synchronization control method according to an embodiment of the present application. The method can optionally be applied to the system shown in Fig. 1, but is not limited thereto. The method includes:
  • the terminal device receives a first downlink signal from the network device
  • the terminal device modulates the reflected signal of the first downlink signal to obtain a first uplink signal, and sends the first uplink signal to the network device; wherein, the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • FIG. 8 shows a schematic flowchart of a synchronization control method according to another embodiment of the present application. The method is also optionally applicable to the system shown in FIG. 1 , but is not limited thereto. The method includes:
  • the network device sends a first downlink signal to the terminal device; wherein, the reflected signal of the first downlink signal is used for modulation to obtain a first uplink signal;
  • the network device receives a first uplink signal from the terminal device; wherein the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • the terminal device performs uplink communication based on backscattering, wherein the reflected signal of the downlink signal sent by the network device is modulated to obtain an uplink signal carrying synchronization information, and the network device can obtain the timing error and/or frequency error of the terminal device based on the synchronization information. Therefore, the network device can correct or assist the terminal device to correct the timing and/or frequency error, improve the timing accuracy, and ensure that the terminal device and the network device send and receive information through accurate timing.
  • spectrum resources can be saved.
  • the terminal device may include a terminal based on backscatter communication, such as a zero-power terminal, a semi-active terminal, and the like.
  • the network device may include an energy supply node and a receiving base station for zero-power communication, and may also include a network device used in other communication systems to assist terminals in timing deviation correction.
  • this embodiment of the present application supports a scheme in which the energy supply node and the receiving base station are separated or integrated.
  • the network device may include a single device, which not only serves as an energy supply node to provide energy to the terminal device, but also serves as a receiving base station to receive an uplink signal sent by the terminal device.
  • the network device may also include multiple devices, including functional nodes and receiving base stations that are independent of each other.
  • a coordination link interface is set between the functional node and the receiving base station.
  • the first downlink signal sent by the network device may be used for power supply and information transmission.
  • the first downlink signal may include an energy supply signal and a signal used for information transmission; wherein, the signal used for information transmission may be specifically used to transmit downlink information to the terminal device based on service requirements, so as to trigger the terminal device to use backscatter technology to transmit uplink information, therefore, it may also be called a trigger signal.
  • the first downlink signal may also include a signal used for power supply and information transmission at the same time.
  • the function signal issued by the network device and the signal used for information transmission may be two signals or the same signal.
  • the two signals may not be sent at the same frequency point, or may be sent at the same frequency point.
  • the foregoing energy supply signal may be continuously or intermittently sent by a network device (such as a base station or an energy supply node, etc.) in a downlink frequency band.
  • the energy supply signal may be a continuous wave (Continuous wave, CW), such as a sine wave.
  • the terminal device receives the first downlink signal, performs energy collection and demodulates the trigger signal. After the terminal device obtains energy, it can perform functions such as signal reception, signal transmission, and measurement. In the embodiment of the present application, the terminal device modulates synchronization information in the reflected signal of the first downlink signal, so that the network device can estimate the timing error and/or frequency error of the terminal device.
  • the synchronization information may include a synchronization signal sequence carried in the first uplink signal, and may also be understood as information such as timing and frequency of the terminal device obtained based on the synchronization signal sequence.
  • the terminal device modulating the reflected signal of the first downlink signal may include: the terminal device modulating the reflected signal based on a synchronization signal sequence. That is, the first uplink signal is obtained by modulating the reflected signal based on the synchronization signal sequence.
  • the terminal may adopt modulation methods such as amplitude modulation (ASK), frequency modulation (FSK) or phase modulation (PSK), that is, the first uplink signal is obtained by modulating the synchronization signal sequence onto the reflected signal based on the amplitude modulation method, frequency modulation method or phase modulation method.
  • the terminal device modulating the reflected signal based on the synchronization signal sequence includes: the terminal device modulating the synchronization signal sequence onto the reflected signal based on an amplitude modulation manner, a frequency modulation manner or a phase modulation manner.
  • the aforementioned synchronization signal sequence may be a sequence with a high degree of time-domain autocorrelation.
  • the synchronization signal sequence may include a pseudo-noise (Pseudo-Noise, PN) sequence, a discrete Fourier transform (Discrete Fourier Transform, DFT) sequence or a constant amplitude zero autocorrelation (Constant Amplitude Zero Auto Correlation, CAZAC) sequence, etc.
  • the PN sequence may also be called a pseudo-random (Pseudo-Random) sequence.
  • the PN sequence may include an M sequence or a Gold sequence, etc.
  • the first uplink signal is also obtained by modulating the reflected signal based on the uplink information.
  • the terminal device modulating the reflected signal of the first downlink signal may further include: the terminal device modulating the reflected signal based on the uplink information.
  • the first uplink signal is obtained by modulating the uplink information onto the reflected signal that has been modulated based on the synchronization signal sequence based on subcarrier modulation. That is to say, the synchronization signal sequence may be modulated on the reflected signal first, and then the uplink information may be directly modulated on the synchronization signal sequence.
  • the terminal device modulating the reflected signal based on the uplink information includes: the terminal device modulating the uplink information onto the reflected signal that has been modulated based on the synchronization signal sequence based on subcarrier modulation.
  • uplink information and synchronization information may also be modulated on the reflected signal in a time division multiplexing manner. That is, the uplink information is multiplexed with the synchronization signal sequence in a time-division manner.
  • the uplink information includes at least one of the following information:
  • Uplink data (such as business data);
  • Uplink feedback control information used to indicate whether the downlink data in the first downlink signal is successfully received
  • Identification information of the terminal device (such as a terminal ID to identify the terminal device to access the network).
  • the first downlink signal and the first uplink signal use the same frequency point.
  • this optional method it is allowed to use the same uplink and downlink frequency points, and solve the uplink and downlink interference problem through different sending nodes and receiving nodes, so that uplink and downlink spectrum resources can be better utilized.
  • the network device may correct the timing of the uplink signal based on the synchronization information.
  • the timing error and/or frequency error of the terminal device obtained based on the synchronization information may be used by the network device to adjust the timing and/or frequency of the first uplink signal.
  • the above method further includes: the network device performs timing adjustment and/or frequency adjustment on the first uplink signal based on the timing error and/or frequency error of the terminal device.
  • the network device may feed back a timing and/or frequency adjustment command to the terminal device, and the terminal device performs timing correction by itself based on the adjustment command. That is, the above method also includes:
  • the network device sends a second downlink signal to the terminal device
  • the second downlink signal includes an adjustment command determined based on the timing error and/or frequency error of the terminal device, and the adjustment command is used for the terminal device to perform timing adjustment and/or frequency adjustment on the reflected signal of the second downlink signal to obtain the second uplink signal.
  • the above method also includes:
  • the terminal device receives a second downlink signal from the network device; wherein, the second downlink signal includes an adjustment command determined based on a timing error and/or a frequency error of the terminal device;
  • the terminal device modulates the reflected signal of the second downlink signal, and adjusts the timing and/or frequency of the reflected signal based on the adjustment command to obtain the second uplink signal, and sends the second uplink signal to the network device.
  • the process of modulating the reflected signal of the second uplink signal may be implemented by referring to the technical details of modulating the reflected signal of the first uplink signal above, and details are not described here.
  • the network device when the network device issues a downlink signal, it carries an adjustment command, and the adjustment command can be determined based on the latest obtained terminal timing error and/or frequency error.
  • the processing of the reflected signal of the downlink signal by the terminal device includes timing correction and modulation of the reflected signal to carry synchronization information (optionally also carry other uplink information), so as to obtain the transmitted uplink signal.
  • the uplink signal can enable the network device to obtain new error information and perform synchronization control on subsequent signals. In this way, a closed-loop control timing error is realized, and error diffusion can be prevented.
  • the synchronization control method includes the following steps:
  • the terminal device receives the energy supply signal sent by the network device, and demodulates the trigger signal
  • the terminal equipment is based on the synchronization information of the energy supply signal reflection modulation; the network equipment measures the synchronization information, and corrects the timing and frequency errors of the terminal equipment.
  • the terminal device may modulate the synchronous signal sequence onto the reflected signal by means of amplitude modulation, frequency modulation, phase modulation, and the like.
  • Fig. 11 shows a schematic diagram of modulating the synchronization signal sequence onto the reflected signal by way of amplitude modulation.
  • the modulated synchronization signal sequence has a high time-domain autocorrelation characteristic, for example, a PN sequence, a DFT sequence, or a CAZAC sequence is used.
  • the PN sequence may be a pseudo-random sequence such as an M sequence or a Gold sequence.
  • x(n) (x(n+7)+x(n+3)+x(n)) mod2;
  • n is a time domain position number
  • x(n) is a value corresponding to the time domain position in the synchronization sequence.
  • the binary M-sequence obtained based on this polynomial can be modulated onto a continuous wave energy supply signal (an M-sequence polynomial using other parameters is not excluded).
  • the signal reflected by the terminal device may further modulate other information.
  • Other information is directly reflectively modulated on top of the sync signal.
  • the signal reflected by the terminal device may further carry other information.
  • Other information is multiplexed with the modulated synchronization signal in a time-division manner.
  • the above additional information may include:
  • Uplink data of the terminal to report the uplink data
  • Terminal uplink feedback control to report whether the downlink data is successfully received
  • the terminal ID is reported to identify the terminal accessing the network.
  • the terminal device may use the same frequency point on the downlink channel and the uplink reflection channel.
  • the synchronous control method includes the following steps:
  • the terminal device receives the energy supply signal sent by the network device, and demodulates the trigger signal
  • the terminal device reflects the modulated synchronization information based on the energy supply signal; the network device measures the synchronization information, issues a timing/frequency adjustment command, and corrects the timing and frequency errors of the terminal device; the terminal further reflects the signal based on the timing/frequency adjustment command.
  • the downlink signal sent by the network device can also modulate the timing/frequency adjustment command, that is, the timing/frequency adjustment command can be carried by each downlink signal sent to help the terminal device adjust timing.
  • the uplink signal sent by the terminal equipment is based on the updated timing/frequency adjustment command, and the synchronization information is modulated on the reflected signal. In this way, a closed-loop control is formed to prevent error diffusion.
  • the terminal device may modulate the synchronization signal sequence onto the reflected signal by means of amplitude modulation, frequency modulation, phase modulation, and the like.
  • the modulated synchronization signal sequence has a high time-domain autocorrelation characteristic, for example, a PN sequence, a DFT sequence, or a CAZAC sequence is used.
  • the PN sequence may be a pseudo-random sequence such as an M sequence or a Gold sequence.
  • the signal reflected by the terminal device may further modulate other information.
  • Other information is directly reflectively modulated on top of the sync signal.
  • the signal reflected by the terminal device may further carry other information.
  • Other information is multiplexed with the modulated synchronization signal in a time-division manner.
  • the above additional information may include:
  • Uplink data of the terminal to report the uplink data
  • Terminal uplink feedback control to report whether the downlink data is successfully received
  • the terminal ID is reported to identify the terminal accessing the network.
  • the terminal device may use the same frequency point on the downlink channel and the uplink reflection channel.
  • the network device can correct or assist the terminal device to correct timing and/or frequency errors, improve timing accuracy, and ensure that the terminal device and the network device send and receive information at accurate timing.
  • the uplink reflection and the uplink synchronization reference signal are integrated, spectrum resources can be saved.
  • this embodiment of the present application further provides a terminal device 100, referring to FIG. 13 , which includes:
  • the first receiving module 110 is configured to receive a first downlink signal from a network device
  • the first processing module 120 is configured to modulate the reflected signal of the first downlink signal to obtain the first uplink signal;
  • the first sending module 130 is configured to send a first uplink signal to the network device; wherein, the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • the first processing module 120 may include:
  • the synchronization signal modulation unit 121 is configured to modulate the reflected signal based on the synchronization signal sequence.
  • the synchronization signal modulation unit 121 is specifically configured to:
  • the synchronization signal sequence is modulated onto the reflected signal based on an amplitude modulation method, a frequency modulation method or a phase modulation method.
  • the synchronization signal sequence includes a PN sequence, a DFT sequence or a CAZAC sequence.
  • the PN sequence includes an M sequence or a Gold sequence.
  • the first processing module 120 may include:
  • the uplink information modulation unit 122 is configured to modulate the reflected signal based on the uplink information.
  • the uplink information modulation unit 122 is specifically configured to:
  • the uplink information is modulated onto the reflected signal that has been modulated based on the synchronization signal sequence.
  • the uplink information and synchronization information are modulated on the reflected signal in a time-division multiplexing manner.
  • the uplink information includes at least one of the following information:
  • Uplink feedback control information used to indicate whether the downlink data in the first downlink signal is successfully received
  • the timing error and/or frequency error of the terminal device is used by the network device to adjust the timing and/or frequency of the first uplink signal.
  • the first receiving module 110 is further configured to: receive a second downlink signal from the network device; wherein the second downlink signal includes an adjustment command determined based on the timing error and/or frequency error of the terminal device;
  • the first processing module 120 is further configured to: modulate the reflected signal of the second downlink signal, and adjust the timing and/or frequency of the reflected signal based on the adjustment command to obtain the second uplink signal;
  • the first sending module 130 is further configured to: send the second uplink signal to the network device.
  • the first downlink signal and the first uplink signal use the same frequency point.
  • the terminal device 100 in the embodiment of the present application can realize the corresponding functions of the terminal device in the foregoing method embodiments.
  • each module (submodule, unit, or component, etc.) in the terminal device 100 refers to the corresponding description in the above method embodiment, and details are not repeated here.
  • the functions described by each module (submodule, unit or component, etc.) in the terminal device 100 in the embodiment of the present application may be realized by different modules (submodules, units or components, etc.), or may be realized by the same module (submodule, unit or component, etc.).
  • the communication module in the embodiment of the present application may be implemented by a transceiver of the device, and part or all of the other modules may be implemented by a processor of the device.
  • Fig. 15 is a schematic block diagram of a network device 200 according to an embodiment of the present application.
  • the network device 200 may include:
  • the second sending module 210 is configured to send the first downlink signal to the terminal device; wherein, the reflected signal of the first downlink signal is used for modulation to obtain the first uplink signal;
  • the second receiving module 220 is configured to receive a first uplink signal from a terminal device; wherein, the first uplink signal is modulated by the terminal device to carry synchronization information, and the synchronization information is used to obtain a timing error and/or a frequency error of the terminal device.
  • the first uplink signal is obtained by modulating the reflected signal based on the synchronization signal sequence.
  • the first uplink signal is obtained by modulating the synchronization signal sequence onto the reflected signal based on an amplitude modulation manner, a frequency modulation manner or a phase modulation manner.
  • the synchronization signal sequence includes a PN sequence, a DFT sequence or a CAZAC sequence.
  • the PN sequence includes an M sequence or a Gold sequence.
  • the first uplink signal is obtained by modulating the reflected signal based on the uplink information.
  • the first uplink signal is obtained by modulating the uplink information onto the reflected signal that has been modulated based on the synchronization signal sequence based on subcarrier modulation.
  • the uplink information and synchronization information are modulated on the reflected signal in a time-division multiplexing manner.
  • the uplink information includes at least one of the following information:
  • Uplink feedback control information used to indicate whether the downlink data in the first downlink signal is successfully received
  • the network device 200 further includes:
  • the second processing module 230 is configured to perform timing adjustment and/or frequency adjustment on the first uplink signal based on the timing error and/or frequency error of the terminal device.
  • the second sending module 210 is further configured to: send a second downlink signal to the terminal device;
  • the second downlink signal includes an adjustment command determined based on the timing error and/or frequency error of the terminal device, and the adjustment command is used for the terminal device to perform timing adjustment and/or frequency adjustment on the reflected signal of the second downlink signal to obtain the second uplink signal.
  • the first downlink signal and the first uplink signal use the same frequency point.
  • the network device 200 in the embodiment of the present application can implement the corresponding functions of the network device in the foregoing method embodiments.
  • each module (submodule, unit or component, etc.) in the network device 200 refers to the corresponding description in the above method embodiment, and details are not repeated here.
  • the functions described by the various modules (submodules, units or components, etc.) in the network device 200 of the embodiment of the application can be realized by different modules (submodules, units or components, etc.), or can be realized by the same module (submodule, unit or component, etc.), all of which can realize the corresponding functions in the embodiments of the application.
  • the communication module in the embodiment of the present application may be implemented by a transceiver of the device, and part or all of the other modules may be implemented by a processor of the device.
  • Fig. 17 is a schematic structural diagram of a communication device 600 according to an embodiment of the application, wherein the communication device 600 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the application.
  • the communication device 600 may further include a memory 620 .
  • the processor 610 can invoke and run a computer program from the memory 620, so as to implement the method in the embodiment of the present application.
  • the memory 620 may be an independent device independent of the processor 610 , or may be integrated in the processor 610 .
  • the communication device 600 may further include a transceiver 630, and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, to send information or data to other devices, or to receive information or data sent by other devices.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include antennas, and the number of antennas may be one or more.
  • the communication device 600 may be the network device of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application.
  • the communication device 600 may implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application. For the sake of brevity, details are not repeated here.
  • the communication device 600 may be the terminal device of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the terminal device in the methods of the embodiment of the present application.
  • the communication device 600 may implement the corresponding processes implemented by the terminal device in the methods of the embodiment of the present application. For the sake of brevity, details are not repeated here.
  • Fig. 18 is a schematic structural diagram of a chip 700 according to an embodiment of the present application, wherein the chip 700 includes a processor 710, and the processor 710 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the chip 700 may further include a memory 720 .
  • the processor 710 can invoke and run a computer program from the memory 720, so as to implement the method in the embodiment of the present application.
  • the memory 720 may be an independent device independent of the processor 710 , or may be integrated in the processor 710 .
  • the chip 700 may also include an input interface 730 .
  • the processor 710 may control the input interface 730 to communicate with other devices or chips, specifically, may obtain information or data sent by other devices or chips.
  • the chip 700 may also include an output interface 740 .
  • the processor 710 can control the output interface 740 to communicate with other devices or chips, specifically, can output information or data to other devices or chips.
  • the chip can be applied to the network device in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application.
  • the chip can implement the corresponding processes implemented by the network device in the methods of the embodiment of the present application.
  • the chip can be applied to the terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the terminal device in the methods of the embodiments of the present application.
  • the chip can implement the corresponding processes implemented by the terminal device in the methods of the embodiments of the present application.
  • the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.
  • the processor mentioned above may be a general-purpose processor, a digital signal processor (DSP), an off-the-shelf programmable gate array (FPGA), an application specific integrated circuit (ASIC), or other programmable logic devices, transistor logic devices, discrete hardware components, and the like.
  • DSP digital signal processor
  • FPGA off-the-shelf programmable gate array
  • ASIC application specific integrated circuit
  • the general-purpose processor mentioned above may be a microprocessor or any conventional processor or the like.
  • the aforementioned memories may be volatile memories or nonvolatile memories, or may include both volatile and nonvolatile memories.
  • the non-volatile memory may be read-only 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) or flash memory.
  • the volatile memory may be random access memory (RAM).
  • the memory in the embodiment of the present application can also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, 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) and so on. 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.
  • FIG. 19 is a schematic block diagram of a communication system 800 according to an embodiment of the present application.
  • the communication system 800 includes a terminal device 810 and a network device 820 .
  • the terminal device 810 can be used to realize the corresponding functions realized by the terminal device in the methods of various embodiments of the present application
  • the network device 820 can be used to realize the corresponding functions realized by the network device in the methods of various embodiments of the present application.
  • details are not repeated here.
  • all or part of them may be implemented by software, hardware, firmware or any combination thereof.
  • software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
  • the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
  • the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable device.
  • the computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from one website site, computer, server or data center to another website site, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (such as infrared, wireless, microwave, etc.) means.
  • the computer-readable storage medium may be any available medium that can be accessed by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
  • the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium (for example, a solid state disk (SSD)).
  • sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means two or more, unless otherwise specifically defined.

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Abstract

本申请涉及一种同步控制方法、终端设备、网络设备、芯片、计算机可读存储介质、计算机程序产品、计算机程序和通信系统，该方法包括：终端设备接收来自网络设备的第一下行信号；终端设备对第一下行信号的反射信号进行调制，得到第一上行信号，向网络设备发送第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。利用本申请实施例能够提高定时准确性。

Description

同步控制方法、终端设备、网络设备、芯片和存储介质 技术领域
本申请涉及通信领域，并且更具体地，涉及一种同步控制方法、终端设备、网络设备、芯片、计算机可读存储介质、计算机程序产品、计算机程序和通信系统。
背景技术
通信设备的定时准确性直接影响着通信性能。然而，受限于成本和功耗等原因，一些终端设备(例如零功耗终端)的时钟电路较为简单，导致定时、频率等误差都比较大。需要考虑如何提高定时准确性。
发明内容
有鉴于此，本申请实施例提供一种同步控制方法、终端设备、网络设备、芯片、计算机可读存储介质、计算机程序产品、计算机程序和通信系统，可用于解决定时调整问题。
本申请实施例提供一种同步控制方法，包括：
终端设备接收来自网络设备的第一下行信号；
终端设备对第一下行信号的反射信号进行调制，得到第一上行信号，向网络设备发送第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
本申请实施例提供一种同步控制方法，包括：
网络设备向终端设备发送第一下行信号；其中，第一下行信号的反射信号用于调制得到第一上行信号；
网络设备接收来自终端设备的第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
本申请实施例还提供一种终端设备，包括：
第一接收模块，用于接收来自网络设备的第一下行信号；
第一处理模块，用于对第一下行信号的反射信号进行调制，得到第一上行信号；
第一发送模块，用于向网络设备发送第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
本申请实施例还提供一种网络设备，包括：
第二发送模块，用于向终端设备发送第一下行信号；其中，第一下行信号的反射信号用于调制得到第一上行信号；
第二接收模块，用于接收来自终端设备的第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
本申请实施例还提供一种终端设备，包括：处理器和存储器，存储器用于存储计算机程序，处理器调用并运行存储器中存储的计算机程序，执行本申请任一实施例提供的同步控制方法。
本申请实施例还提供一种网络设备，包括：处理器和存储器，存储器用于存储计算机程序，处理器调用并运行存储器中存储的计算机程序，执行本申请任一实施例提供的同步控制方法。
本申请实施例还提供一种芯片，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有芯片的设备执行本申请任一实施例提供的同步控制方法。
本申请实施例还提供一种计算机可读存储介质，用于存储计算机程序，其中，计算机程序使得计算机执行本申请任一实施例提供的同步控制方法。
本申请实施例还提供一种计算机程序产品，包括计算机程序指令，其中，计算机程序指令使得计算机执行本申请任一实施例提供的同步控制方法。
本申请实施例还提供一种计算机程序，计算机程序使得计算机执行本申请任一实施例提供的同步控制方法。
本申请实施例还提供一种通信系统，包括用于执行本申请任一实施例提供的同步控制方法的终端设备和网络设备。
根据本申请实施例的技术方案，终端设备基于反向散射的方式进行上行通信，其中，对网络设备发送的下行信号的反射信号进行调制，得到携带同步信息的上行信号，网络设备可以基于该同步信息获得终端设备的定时误差和/或频率误差。因此，网络设备可以纠偏或协助终端设备纠偏定时和/或频率误差，提高定时准确性，保证终端设备和网络设备通过准确的定时收发信息。
附图说明
图1是本申请实施例的通信系统架构的示意图。
图2是本申请实施例的零功耗通信的原理图。
图3是本申请实施例的反向散射通信的原理图。
图4是本申请实施例的能量采集的原理图。
图5是本申请实施例的电阻负载调制的电路原理图。
图6A是本申请实施例的RC振荡器的误差的示意图一。
图6B是本申请实施例的RC振荡器的误差的示意图二。
图7是根据本申请一实施例的同步控制方法的示意性流程图。
图8是根据本申请另一实施例的同步控制方法的示意性流程图。
图9是本申请实施例的同步控制方法的场景示意图。
图10是本申请应用示例一中同步控制方法的示意图。
图11是本申请应用示例中同步信号序列调制的示意图。
图12是本申请应用示例二中同步控制方法的示意图。
图13是本申请一实施例的终端设备的示意性结构框图。
图14是本申请另一实施例的终端设备的示意性结构框图。
图15是本申请一实施例的网络设备的示意性结构框图。
图16是本申请另一实施例的网络设备的示意性结构框图。
图17是本申请实施例的通信设备示意性框图。
图18是本申请实施例的芯片的示意性框图。
图19是本申请实施例的通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行描述。
本申请实施例的技术方案可以应用于各种通信系统，例如：全球移动通讯(Global System of Mobile communication，GSM)系统、码分多址(Code Division Multiple Access，CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access，WCDMA)系统、通用分组无线业务(General Packet Radio Service，GPRS)、长期演进(Long Term Evolution，LTE)系统、先进的长期演进(Advanced long term evolution，LTE-A)系统、新无线(New Radio，NR)系统、NR系统的演进系统、免授权频谱上的LTE(LTE-based access to unlicensed spectrum，LTE-U)系统、免授权频谱上的NR(NR-based access to unlicensed spectrum，NR-U)系统、非地面通信网络(Non-Terrestrial Networks，NTN)系统、通用移动通信系统(Universal Mobile Telecommunication System，UMTS)、无 线局域网(Wireless Local Area Networks，WLAN)、无线保真(Wireless Fidelity，WiFi)、第五代通信(5th-Generation，5G)系统或其他通信系统等。
通常来说，传统的通信系统支持的连接数有限，也易于实现，然而，随着通信技术的发展，移动通信系统将不仅支持传统的通信，还将支持例如，设备到设备(Device to Device，D2D)通信，机器到机器(Machine to Machine，M2M)通信，机器类型通信(Machine Type Communication，MTC)，车辆间(Vehicle toVehicle，V2V)通信，或车联网(Vehicle to everything，V2X)通信等，本申请实施例也可以应用于这些通信系统。
可选地，本申请实施例中的通信系统可以应用于载波聚合(Carrier Aggregation，CA)场景，也可以应用于双连接(Dual Connectivity，DC)场景，还可以应用于独立(Standalone，SA)布网场景。
本申请实施例结合网络设备和终端设备描述了各个实施例，其中，终端设备也可以称为用户设备(User Equipment，UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
终端设备可以是WLAN中的站点(STAION，ST)，可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol，SIP)电话、无线本地环路(Wireless Local Loop，WLL)站、个人数字处理(Personal Digital Assistant，PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、下一代通信系统例如NR网络中的终端设备，或者未来演进的公共陆地移动网络(Public Land Mobile Network，PLMN)网络中的终端设备等。
在本申请实施例中，终端设备可以部署在陆地上，包括室内或室外、手持、穿戴或车载；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、气球和卫星上等)。
在本申请实施例中，终端设备可以是手机(Mobile Phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality，VR)终端设备、增强现实(Augmented Reality，AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或智慧家庭(smart home)中的无线终端设备等。
作为示例而非限定，在本申请实施例中，该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备，是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称，如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上，或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备，更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能，例如：智能手表或智能眼镜等，以及只专注于某一类应用功能，需要和其它设备如智能手机配合使用，如各类进行体征监测的智能手环、智能首饰等。
在本申请实施例中，网络设备可以是用于与移动设备通信的设备例如接入网设备。网络设备可以是WLAN中的接入点(Access Point，AP)，GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB，NB)，还可以是LTE中的演进型基站(Evolutional Node B，eNB或eNodeB)，或者中继站或接入点，或者车载设备、可穿戴设备以及NR网络中的网络设备(gNB)或者未来演进的PLMN 网络中的网络设备等。
网络设备还可以是核心网设备，例如移动性管理实体(Mobility Management Entity，MME)、接入与移动性管理功能(Access and Mobility Management Function，AMF)等其他网络实体，本申请实施例对此不作限定。
作为示例而非限定，在本申请实施例中，网络设备可以具有移动特性，例如网络设备可以为移动的设备。可选地，网络设备可以为卫星、气球站。例如，卫星可以为低地球轨道(low earth orbit，LEO)卫星、中地球轨道(medium earth orbit，MEO)卫星、地球同步轨道(geostationary earth orbit，GEO)卫星、高椭圆轨道(High Elliptical Orbit，HEO)卫星等。可选地，网络设备还可以为设置在陆地、水域等位置的基站。
在本申请实施例中，网络设备可以为小区提供服务，终端设备通过该小区使用的传输资源(例如，频域资源，或者说，频谱资源)与网络设备进行通信，该小区可以是网络设备(例如基站)对应的小区，小区可以属于宏基站，也可以属于小小区(Small cell)对应的基站，这里的小小区可以包括：城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等，这些小小区具有覆盖范围小、发射功率低的特点，适用于提供高速率的数据传输服务。
图1示意性地示出了包括一个网络设备1100和两个终端设备1200的无线接入系统1000。可选地，该无线通信系统1000可以包括多个网络设备1100，并且每个网络设备1100的覆盖范围内可以包括其它数量的终端设备。
应理解，本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统为例，通信设备可包括具有通信功能的网络设备和终端设备，网络设备和终端设备可以为本申请实施例中的具体设备。
应理解，本文中术语“系统”和“网络”在本文中常可互换使用。本文中术语“和/或”用来描述关联对象的关联关系，例如表示前后关联对象可存在三种关系，举例说明，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这三种情况。本文中字符“/”一般表示前后关联对象是“或”的关系。
应理解，在本申请的实施例中提到的“指示”可以是直接指示，也可以是间接指示，还可以是表示具有关联关系。举例说明，A指示B，可以表示A直接指示B，例如B可以通过A获取；也可以表示A间接指示B，例如A指示C，B可以通过C获取；还可以表示A和B之间具有关联关系。
在本申请实施例的描述中，术语“对应”可表示两者之间具有直接对应或间接对应的关系，也可以表示两者之间具有关联关系，也可以是指示与被指示、配置与被配置等关系。
为便于理解本申请实施例的技术方案，以下对本申请实施例的相关技术进行说明，以下相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合，其均属于本申请实施例的保护范围。
(一)基于零功耗设备的通信
近年来，零功耗设备的应用越来越广泛。一种典型的零功耗设备是射频识别(Radio Frequency Identification，RFID)设备，它是利用收发端无线电耦合的方式，实现无接触的标签信息自动传输与识别的技术。这包括了近距离的电感耦合和远距离的电磁耦合。RFID标签又称为“射频标签”或“电子标签”。根据供电方式的不同来划分的电子标签的类型，可以分为有源电子标签，无源电子标签和半无源电子标签。有源电子标签，又称为主动式电子标签，是指电子标签内置电池提供工作的能量。不同于被动射频的激活方式，标签可主动在设定频段发送信息。无源电子标签，又称为被动式电子标签，其不支持内装电池。无源电子标签接近读写器时，处于读写器天线辐射形成的近场范围 内的电子标签天线通过电磁感应产生感应电流，感应电流驱动电子标签芯片电路。芯片电路通过电子标签天线将存储在标签中的标识信息发送给读写器。半主动式电子标签继承了无源电子标签体积小、重量轻、价格低、使用寿命长的优点，内置的电池在没有读写器访问的时候，只为芯片内很少的电路提供电源，只有在读写器访问时，内置电池向RFID芯片供电，以增加标签的读写距离，提高通信的可靠性。
作为一种无线通信技术，最基本的RFID系统是由电子标签(TAG)和读写器(Reader/Writer)两部分构成。其中，电子标签由耦合组件及芯片构成，每个电子标签都有独特的电子编码，放在被测目标上以达到标记目标物体的目的。读写器不仅能够读取电子标签上的信息，而且还能够写入电子标签上的信息，同时为电子标签提供通信所需要的能量。电子标签进入电磁场后，接收读写器发出的射频信号，无源电子标签或者被动电子标签利用空间中产生的电磁场得到的能量，将电子标签存储的信息传送出去，读写器读取信息并且进行解码，从而识别电子标签。
RFID是一种典型的零功耗通信。这类零功耗通信关键技术，包括了能量采集、反向散射通信以及低功耗计算。如图2所示，一个典型的零功耗通信系统包括读写器和零功耗终端。读写器发射无线电波，用于向零功耗终端提供能量。安装在零功耗终端的能量采集模块可以采集空间中的无线电波携带的能量(图2中所示为读写器发射的无线电波)，用于驱动零功耗终端的低功耗计算模块和实现反向散射通信。零功耗终端获得能量后，可以接收读写器的控制命令并基于控制信令基于后向散射的方式向读写器发送数据。所发送的数据可以来自于零功耗终端自身存储的数据(如身份标识或预先写入的信息，如商品的生产日期、品牌、生产厂家等)。零功耗终端也可以加载各类传感器，从而基于零功耗机制将各类传感器采集的数据上报。
基于零功耗设备的通信，简称零功耗通信，包括以下关键技术：
1、反向散射通信(Back Scattering)
如图3所示，零功耗设备例如图3中的反向散射标签，接收反向散射读写器发送的载波信号，通过RF能量采集模块采集能量。进而对低功耗处理模块(图3中的逻辑处理模块)进行供能，对来波信号进行调制，并进行反向散射。
主要特征如下：
(1)终端不主动发射信号，通过调制来波信号实现反向散射通信；
(2)终端不依赖传统的有源功放发射机，同时使用低功耗计算单元，极大降低硬件复杂度；
(3)结合能量采集可实现免电池通信。
2、能量采集(RF Power Harvesting)
如图4所示，利用RF模块通过电磁感应实现对空间电磁波能量的采集，进而实现对负载电路的驱动(低功耗运算、传感器等)，可以实现免电池。
3、负载调制
负载调制是电子标签经常使用的向读写器传输数据的方法。负载调制通过对电子标签振荡回路的电参数按照数据流的节拍进行调节，使电子标签阻抗的大小和相位随之改变，从而完成调制的过程。负载调制技术主要有电阻负载调制和电容负载调制两种方式。在电阻负载调制中，负载并联一个电阻，称为负载调制电阻，该电阻按数据流的时钟接通和断开，开关S的通断由二进制数据编码控制。电阻负载调制的电路原理图如图5所示。
在电容负载调制中，负载并联一个电容，取代了图5中由二进制数据编码控制的负载调制电阻。
4、编码
电子标签传输的数据，可以用不同形式的代码来表示二进制的“1”和“0”。无线射频识别系统通常使用下列编码方法中的一种：反向不归零(NRZ)编码、曼彻斯特(Manchester)编码、单极性归零(Unipolar RZ)编码、差动双相(DBP)编码、米勒(Miller)编码利差动编码。通俗的说，就是用不同的脉冲信号表示0和1。
(二)蜂窝无源物联网
随着5G行业应用增加，物联网中连接物的种类和应用场景越来越多，对通信终端的价格和功耗也将有更高要求。免电池、低成本的无源物联网设备的应用成为蜂窝物联网的关键技术，充实5G网络链接终端类型和数量，真正实现万物互联。其中无源物联网设备可以基于现有的零功耗设备，运用于蜂窝物联网。
(三)副载波调制
副载波调制是指首先把信号调制在载波1上，基于调制结果再去调制另外一个频率更高的载波2。副载波调制是RFID系统经常采用的一种调制方式。
上述相关技术中的零功耗终端需要通过网络设备(例如基站、RFID读写器等)或其他来源提供供能信号，使零功耗终端获得能量驱动电路。在零功耗终端电路中也提供时钟。考虑到成本和功耗原因，零功耗的时钟电路部分往往采用RC振荡器的简化电路。这种电路的定时、频率、相位等误差都比较大。图6A和图6B示出了基于实际测试的零功耗终端定时信号误差的示意图。具体数据如下：
采样周期 2e-8(s)
比特数 176
采样时间 (9460-739)*2e-8＝1.7442e-4
每比特的时间 1.7442e-4/176＝9.9102e-7(s)
每比特的理论时间 10us
误差 8.98‰
可以看到，RC振荡器的误差约在0.89％。
尽管采用微控制器的零功耗设备能够进一步修正误差，但还是要远高于晶体振荡器电路的误差。
为了解决上述问题，本申请提出通过网络进一步控制反射信号的误差。否则，定时误差及其累计值会导致系统无法正常通信。同时，由于终端反射的信号频率和供能的连续波频率不同，因此缺乏参考信号校准。
本申请实施例提供的方案，主要用于解决上述问题中的至少一个。
为了能够更加详尽地了解本发明实施例的特点与技术内容，下面结合附图对本发明实施例的实现进行详细阐述，所附附图仅供参考说明之用，并非用来限定本发明实施例。
图7是根据本申请一实施例的同步控制方法的示意性流程图。该方法可选地可以应用于图1所示的系统，但并不仅限于此。该方法包括：
S110，终端设备接收来自网络设备的第一下行信号；
S120，终端设备对第一下行信号的反射信号进行调制，得到第一上行信号，向网络设备发送第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
与上述方法相应地，网络设备发送第一下行信号并接收第一上行信号。具体地，图8示出了根据本申请另一实施例的同步控制方法的示意性流程图。该方法同样可选地可以应用于图1所示的系统，但不仅限于此。该方法包括：
S210，网络设备向终端设备发送第一下行信号；其中，第一下行信号的反射信号用于调制得到第一上行信号；
S220，网络设备接收来自终端设备的第一上行信号；其中，第一上行信号由终端设 备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
根据上述方法，终端设备基于反向散射的方式进行上行通信，其中，对网络设备发送的下行信号的反射信号进行调制，得到携带同步信息的上行信号，网络设备可以基于该同步信息获得终端设备的定时误差和/或频率误差。因此，网络设备可以纠偏或协助终端设备纠偏定时和/或频率误差，提高定时准确性，保证终端设备和网络设备通过准确的定时收发信息。同时，由于上行反射与上行同步参考信号一体化，因此，可以节约频谱资源。
可选地，在本申请的实施例中，终端设备可以包括零功耗终端、半主动终端等基于反向散射通信的终端。
可选地，在本申请的实施例中，网络设备可以包括零功耗通信的供能节点和接收基站，也可以包括其他通信系统中用于协助终端定时纠偏的网络设备。
可选地，本申请实施例支持供能节点和接收基站分开或一体的方案。
示例性地，网络设备可以包括单个设备，该设备既作为供能节点向终端设备提供能量，又作为接收基站，接收终端设备发送的上行信号。
示例性地，网络设备也可以包括多个设备，其中包括互相独立的功能节点和接收基站。可选地，在功能节点和接收基站分开的场景中，功能节点和接收基站之间设置有协调链路接口。
可选地，在本申请的实施例中，网络设备发送的第一下行信号，可以用于供能和信息传输。
示例性地，第一下行信号可以包括供能信号和用于信息传输的信号；其中，用于信息传输的信号具体可以用于基于业务需求向终端设备传输下行信息，以触发终端设备采用反向散射技术传输上行信息，因此，也可以称为触发信号。或者，第一下行信号也可以包括同时用于供能和信息传输的一个信号。换句话说，网络设备下发的功能信号和用于信息传输的信号，可以是两个信号，也可以是同一个信号。
可选地，如果第一下行信号包括供能信号和用于信息传输的信号，则这两个信号可以不在同一个频点发送，也可以在同一个频点发送。
可选地，上述供能信号可以是网络设备(例如基站或供能节点等)在下行频段持续或间歇性地发送的。供能信号可以是连续波(Continuous wave，CW)，例如正弦波。
相应地，如图9所示，终端设备接收第一下行信号，进行能量采集以及解调触发信号。终端设备获得能量之后，可以进行相应的信号接收、信号发射以及测量等功能。在本申请的实施例中，终端设备在第一下行信号的反射信号中调制同步信息，使得网络设备可以估计终端设备的定时误差和/或频率误差。
可选地，在本申请的实施例中，同步信息可以包括第一上行信号中承载的同步信号序列，也可以理解为基于同步信号序列得到的终端设备的定时、频率等信息。
可选地，在上述步骤S120中，终端设备对第一下行信号的反射信号进行调制，可以包括：终端设备基于同步信号序列对反射信号进行调制。即第一上行信号是基于同步信号序列对反射信号进行调制后得到的。
可选地，终端可以采用幅度调制(ASK)、频率调制(FSK)或相位调制(PSK)等调制方式，即第一上行信号是基于幅度调制方式、频率调制方式或相位调制方式将同步信号序列调制到反射信号上得到的。具体地，终端设备基于同步信号序列对反射信号进行调制，包括：终端设备基于幅度调制方式、频率调制方式或相位调制方式将同步信号序列调制到反射信号上。
可选地，上述同步信号序列可以是具有高度的时域自相关特性的序列。例如，同步信号序列可以包括伪噪声(Pseudo-Noise，PN)序列、离散傅里叶变换(Discrete Fourier  Transform，DFT)序列或恒定幅度零自相关(Constant Amplitude Zero Auto Correlation，CAZAC)序列等。其中，PN序列也可以称为伪随机(Pseudo-Random)序列。
可选地，PN序列可以包括M序列或Gold序列等。
可选地，第一上行信号中还可以调制其他信息，例如与业务或传输控制相关的上行信息。即第一上行信号还基于上行信息对反射信号进行调制后得到。具体地，终端设备对第一下行信号的反射信号进行调制，还可以包括：终端设备基于上行信息对反射信号进行调制。
可选地，第一上行信号是基于副载波调制的方式，将上行信息调制到已基于同步信号序列进行调制的反射信号上得到的。也就是说，可以先将同步信号序列调制在反射信号之上，再将上行信息直接调制在同步信号序列之上。具体地，终端设备基于上行信息对反射信号进行调制，包括：终端设备基于副载波调制的方式，将上行信息调制到已基于同步信号序列进行调制的反射信号上。
可选地，上行信息与同步信息也可以以时分复用的方式调制在反射信号上。即上行信息以时分的方式和同步信号序列复用。
可选地，上行信息包括以下信息中的至少一个：
上行数据(例如业务数据)；
用于指示第一下行信号中的下行数据是否成功接收的上行反馈控制信息；
终端设备的标识信息(例如终端ID，以识别该终端设备接入网络)。
可选地，第一下行信号与第一上行信号采用相同的频点。
根据该可选方式，允许采用同样的上下行频点，通过不同的发送节点和接收节点解决上下行的干扰问题，这样可以较好地利用上下行的频谱资源。
可选地，网络设备可以基于上述同步信息对上行信号进行定时纠偏。具体地，基于同步信息获得的终端设备的定时误差和/或频率误差，可以用于网络设备对第一上行信号进行定时调整和/或频率调整。相应地，上述方法还包括：网络设备基于终端设备的定时误差和/或频率误差，对第一上行信号进行定时调整和/或频率调整。
可选地，网络设备可以向终端设备反馈定时和/或频率的调整命令，由终端设备基于该调整命令自行进行定时纠偏。即上述方法还包括：
网络设备向终端设备发送第二下行信号；
其中，第二下行信号包含基于终端设备的定时误差和/或频率误差确定的调整命令，调整命令用于终端设备对第二下行信号的反射信号进行定时调整和/或频率调整，得到第二上行信号。
相应地，对于终端设备而言，上述方法还包括：
终端设备接收来自网络设备的第二下行信号；其中，第二下行信号包含基于终端设备的定时误差和/或频率误差确定的调整命令；
终端设备对第二下行信号的反射信号进行调制，并基于调整命令对反射信号进行定时调整和/或频率调整，得到第二上行信号，向网络设备发送第二上行信号。
可选地，对第二上行信号的反射信号进行调制的过程，可以参考上述对第一上行信号的反射信号进行调制的技术细节实现，在此不进行赘述。
也就是说，网络设备下发下行信号时，携带调整命令，该调整命令基于可以基于最新获得的终端定时误差和/或频率误差确定。终端设备对下行信号的反射信号进行的处理包括对反射信号进行定时纠偏和调制携带同步信息(可选地还携带其他上行信息)，从而得到发送的上行信号，该上行信号可以使网络设备获得新的误差信息，对后续信号进行同步控制。如此，实现了闭环控制定时误差，可以防止误差扩散。
下面通过两个具体的应用示例描述本申请实施例的具体设置和实现方式。
应用示例一
如图10所示，本应用示例中，同步控制方法包括以下步骤：
终端设备接收网络设备发送的供能信号，并解调触发信号；
终端设备基于供能信号反射调制的同步信息；网络设备测量同步信息，纠偏终端设备的定时和频率误差。
其中，终端设备可以通过幅度调制、频率调制、相位调制等方式将同步信号序列调制到反射的信号上。图11示出了通过幅度调制的方式将同步信号序列调制到反射信号上的示意图。
可选地，所调制的同步信号序列具有高度的时域自相关特性，例如采用PN序列、DFT序列或者CAZAC序列等。其中，PN序列为可以为M序列、Gold序列等伪随机序列。
以M序列为例，一个特定别的M序列生成多项式为：
x(n)＝(x(n+7)+x(n+3)+x(n))mod2；
其中，n为时域位置编号，x(n)为同步序列中对应该时域位置上的数值。基于该多项式获得的二进制M序列可以调制到连续波的供能信号上(不排除使用其他参数的M序列多项式)。
可选地，终端设备所反射的信号还可以进一步调制其他信息。其他信息直接反射调制在同步信号之上。
可选地，终端设备所反射的信号还可以进一步携带其他信息。其他信息以时分的方式和调制的同步信号复用。
上述其他信息可以包括：
终端的上行数据，以上报上行数据；
终端上行反馈控制，以上报下行的数据是否成功接收；
终端ID上报，以识别终端接入网络。
可选地，终端设备在下行信道和上行反射信道可以采用相同的频点。
应用示例二
本应用示例中，同步控制方法包括以下步骤：
终端设备接收网络设备发送的供能信号，并解调触发信号；
终端设备基于供能信号反射调制的同步信息；网络设备测量同步信息，下发定时/频率调整命令，纠偏终端设备的定时和频率误差；终端基于定时/频率调整命令进一步反射信号。
可选地，如图12所示，网络设备所发送的下行信号例如供能信号还可以调制定时/频率调整命令，即定时/频率调整命令可以由每次发送的下行信号携带，以帮助终端设备调整定时。终端设备发送的上行信号基于更新的定时/频率调整命，调制同步信息在反射信号上。如此，形成闭环控制，防止误差扩散。
可选地，终端设备可以通过幅度调制、频率调制、相位调制等方式将同步信号序列调制到反射的信号上。
可选地，所调制的同步信号序列具有高度的时域自相关特性，例如采用PN序列、DFT序列或者CAZAC序列等。其中，PN序列为可以为M序列、Gold序列等伪随机序列。
可选地，终端设备所反射的信号还可以进一步调制其他信息。其他信息直接反射调制在同步信号之上。
可选地，终端设备所反射的信号还可以进一步携带其他信息。其他信息以时分的方式和调制的同步信号复用。
上述其他信息可以包括：
终端的上行数据，以上报上行数据；
终端上行反馈控制，以上报下行的数据是否成功接收；
终端ID上报，以识别终端接入网络。
可选地，终端设备在下行信道和上行反射信道可以采用相同的频点。
以上通过多个实施例从不同角度描述了本申请实施例的具体设置和实现方式。利用上述至少一个实施例，网络设备可以纠偏或协助终端设备纠偏定时和/或频率误差，提高定时准确性，保证终端设备和网络设备通过准确的定时收发信息。同时，由于上行反射与上行同步参考信号一体化，因此，可以节约频谱资源。
与上述至少一个实施例的处理方法相对应地，本申请实施例还提供一种终端设备100，参考图13，其包括：
第一接收模块110，用于接收来自网络设备的第一下行信号；
第一处理模块120，用于对第一下行信号的反射信号进行调制，得到第一上行信号；
第一发送模块130，用于向网络设备发送第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
可选地，如图14所示，第一处理模块120可以包括：
同步信号调制单元121，用于基于同步信号序列对反射信号进行调制。
可选地，同步信号调制单元121具体用于：
基于幅度调制方式、频率调制方式或相位调制方式将同步信号序列调制到反射信号上。
可选地，同步信号序列包括PN序列、DFT序列或CAZAC序列。
可选地，PN序列包括M序列或Gold序列。
可选地，如图14所示，第一处理模块120可以包括：
上行信息调制单元122，用于基于上行信息对反射信号进行调制。
可选地，上行信息调制单元122具体用于：
基于副载波调制的方式，将上行信息调制到已基于同步信号序列进行调制的反射信号上。
可选地，上行信息与同步信息以时分复用的方式调制在反射信号上。
可选地，上行信息包括以下信息中的至少一个：
上行数据；
用于指示第一下行信号中的下行数据是否成功接收的上行反馈控制信息；
终端设备的标识信息。
可选地，终端设备的定时误差和/或频率误差用于网络设备对第一上行信号进行定时调整和/或频率调整。
可选地，第一接收模块110还用于：接收来自网络设备的第二下行信号；其中，第二下行信号包含基于终端设备的定时误差和/或频率误差确定的调整命令；
第一处理模块120还用于：对第二下行信号的反射信号进行调制，并基于调整命令对反射信号进行定时调整和/或频率调整，得到第二上行信号；
第一发送模块130还用于：向网络设备发送第二上行信号。
可选地，第一下行信号与第一上行信号采用相同的频点。
本申请实施例的终端设备100能够实现前述的方法实施例中的终端设备的对应功能，该终端设备100中的各个模块(子模块、单元或组件等)对应的流程、功能、实现方式以及有益效果，可参见上述方法实施例中的对应描述，此处不进行赘述。需要说明，关于本申请实施例的终端设备100中的各个模块(子模块、单元或组件等)所描述的功 能，可以由不同的模块(子模块、单元或组件等)实现，也可以由同一个模块(子模块、单元或组件等)实现，举例来说，第一发送模块与第一接收模块可以是不同的模块，也可以是同一个模块，均能够实现其在本申请实施例中的相应功能。此外，本申请实施例中的通信模块，可通过设备的收发机实现，其余各模块中的部分或全部可通过设备的处理器实现。
图15是根据本申请一实施例的网络设备200的示意性框图。该网络设备200可以包括：
第二发送模块210，用于向终端设备发送第一下行信号；其中，第一下行信号的反射信号用于调制得到第一上行信号；
第二接收模块220，用于接收来自终端设备的第一上行信号；其中，第一上行信号由终端设备调制携带同步信息，同步信息用于获得终端设备的定时误差和/或频率误差。
可选地，第一上行信号是基于同步信号序列对反射信号进行调制后得到的。
可选地，第一上行信号是基于幅度调制方式、频率调制方式或相位调制方式将同步信号序列调制到反射信号上得到的。
可选地，同步信号序列包括PN序列、DFT序列或CAZAC序列。
可选地，PN序列包括M序列或Gold序列。
可选地，第一上行信号是基于上行信息对反射信号进行调制后得到的。
可选地，第一上行信号是基于副载波调制的方式，将上行信息调制到已基于同步信号序列进行调制的反射信号上得到的。
可选地，上行信息与同步信息以时分复用的方式调制在反射信号上。
可选地，上行信息包括以下信息中的至少一个：
上行数据；
用于指示第一下行信号中的下行数据是否成功接收的上行反馈控制信息；
终端设备的标识信息。
可选地，如图16所示，网络设备200还包括：
第二处理模块230，用于基于终端设备的定时误差和/或频率误差，对第一上行信号进行定时调整和/或频率调整。
可选地，第二发送模块210还用于：向终端设备发送第二下行信号；
其中，第二下行信号包含基于终端设备的定时误差和/或频率误差确定的调整命令，调整命令用于终端设备对第二下行信号的反射信号进行定时调整和/或频率调整，得到第二上行信号。
可选地，第一下行信号与第一上行信号采用相同的频点。
本申请实施例的网络设备200能够实现前述的方法实施例中的网络设备的对应功能。该网络设备200中的各个模块(子模块、单元或组件等)对应的流程、功能、实现方式以及有益效果，可参见上述方法实施例中的对应描述，在此不再赘述。需要说明，关于申请实施例的网络设备200中的各个模块(子模块、单元或组件等)所描述的功能，可以由不同的模块(子模块、单元或组件等)实现，也可以由同一个模块(子模块、单元或组件等)实现，均能够实现其在本申请实施例中的相应功能。此外，本申请实施例中的通信模块，可通过设备的收发机实现，其余各模块中的部分或全部可通过设备的处理器实现。
图17是根据本申请实施例的通信设备600示意性结构图，其中通信设备600包括处理器610，处理器610可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，通信设备600还可以包括存储器620。其中，处理器610可以从存储器620 中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器620可以是独立于处理器610的一个单独的器件，也可以集成在处理器610中。
可选地，通信设备600还可以包括收发器630，处理器610可以控制该收发器630与其他设备进行通信，具体地，可以向其他设备发送信息或数据，或接收其他设备发送的信息或数据。
其中，收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线，天线的数量可以为一个或多个。
可选地，该通信设备600可为本申请实施例的网络设备，并且该通信设备600可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该通信设备600可为本申请实施例的终端设备，并且该通信设备600可以实现本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
图18是根据本申请实施例的芯片700的示意性结构图，其中芯片700包括处理器710，处理器710可以从存储器中调用并运行计算机程序，以实现本申请实施例中的方法。
可选地，芯片700还可以包括存储器720。其中，处理器710可以从存储器720中调用并运行计算机程序，以实现本申请实施例中的方法。
其中，存储器720可以是独立于处理器710的一个单独的器件，也可以集成在处理器710中。
可选地，该芯片700还可以包括输入接口730。其中，处理器710可以控制该输入接口730与其他设备或芯片进行通信，具体地，可以获取其他设备或芯片发送的信息或数据。
可选地，该芯片700还可以包括输出接口740。其中，处理器710可以控制该输出接口740与其他设备或芯片进行通信，具体地，可以向其他设备或芯片输出信息或数据。
可选地，该芯片可应用于本申请实施例中的网络设备，并且该芯片可以实现本申请实施例的各个方法中由网络设备实现的相应流程，为了简洁，在此不再赘述。
可选地，该芯片可应用于本申请实施例中的终端设备，并且该芯片可以实现本申请实施例的各个方法中由终端设备实现的相应流程，为了简洁，在此不再赘述。
应理解，本申请实施例提到的芯片还可以称为系统级芯片，系统芯片，芯片系统或片上系统芯片等。
上述提及的处理器可以是通用处理器、数字信号处理器(digital signal processor，DSP)、现成可编程门阵列(field programmable gate array，FPGA)、专用集成电路(application specific integrated circuit，ASIC)或者其他可编程逻辑器件、晶体管逻辑器件、分立硬件组件等。其中，上述提到的通用处理器可以是微处理器或者也可以是任何常规的处理器等。
上述提及的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(read-only memory，ROM)、可编程只读存储器(programmable ROM，PROM)、可擦除可编程只读存储器(erasable PROM，EPROM)、电可擦除可编程只读存储器(electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(random access memory，RAM)。
应理解，上述存储器为示例性但不是限制性说明，例如，本申请实施例中的存储器还可以是静态随机存取存储器(static RAM，SRAM)、动态随机存取存储器(dynamic RAM，DRAM)、同步动态随机存取存储器(synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM，DDR SDRAM)、增强 型同步动态随机存取存储器(enhanced SDRAM，ESDRAM)、同步连接动态随机存取存储器(synch link DRAM，SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)等等。也就是说，本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图19是根据本申请实施例的通信系统800的示意性框图，该通信系统800包括终端设备810和网络设备820。
其中，该终端设备810可以用于实现本申请各个实施例的方法中由终端设备实现的相应的功能，以及该网络设备820可以用于实现本申请各个实施例的方法中由网络设备实现的相应的功能。为了简洁，在此不再赘述。
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。该计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行该计算机程序指令时，全部或部分地产生按照本申请实施例的流程或功能。该计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。该计算机指令可以存储在计算机可读存储介质中，或者从一个计算机可读存储介质向另一个计算机可读存储介质传输，例如，该计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(Digital Subscriber Line，DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。该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包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。该可用介质可以是磁性介质，(例如，软盘、硬盘、磁带)、光介质(例如，DVD)、或者半导体介质(例如固态硬盘Solid State Disk(SSD))等。
应理解，在本申请的各种实施例中，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，而不应对本申请实施例的实施过程构成任何限定。
所属技术领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或隐含地包括至少一个该特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
以上仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以该权利要求的保护范围为准。

Claims (55)

  1. 一种同步控制方法，包括：
    终端设备接收来自网络设备的第一下行信号；
    所述终端设备对所述第一下行信号的反射信号进行调制，得到第一上行信号，向所述网络设备发送所述第一上行信号；其中，所述第一上行信号由所述终端设备调制携带同步信息，所述同步信息用于获得所述终端设备的定时误差和/或频率误差。
  2. 根据权利要求1所述的方法，其中，所述终端设备对所述第一下行信号的反射信号进行调制，包括：
    所述终端设备基于同步信号序列对所述反射信号进行调制。
  3. 根据权利要求2所述的方法，其中，所述终端设备基于同步信号序列对所述反射信号进行调制，包括：
    所述终端设备基于幅度调制方式、频率调制方式或相位调制方式将所述同步信号序列调制到所述反射信号上。
  4. 根据权利要求2或3所述的方法，其中，所述同步信号序列包括伪噪声PN序列、离散傅里叶变换DFT序列或恒定幅度零自相关CAZAC序列。
  5. 根据权利要求4所述的方法，其中，所述PN序列包括M序列或Gold序列。
  6. 根据权利要求1-5中任一项所述的方法，其中，所述终端设备对所述第一下行信号的反射信号进行调制，包括：
    所述终端设备基于上行信息对所述反射信号进行调制。
  7. 根据权利要求6所述的方法，其中，所述终端设备基于上行信息对所述反射信号进行调制，包括：
    所述终端设备基于副载波调制的方式，将所述上行信息调制到已基于同步信号序列进行调制的反射信号上。
  8. 根据权利要求6所述的方法，其中，所述上行信息与所述同步信息以时分复用的方式调制在所述反射信号上。
  9. 根据权利要求6-8中任一项所述的方法，其中，所述上行信息包括以下信息中的至少一个：
    上行数据；
    用于指示所述第一下行信号中的下行数据是否成功接收的上行反馈控制信息；
    所述终端设备的标识信息。
  10. 根据权利要求1-9中任一项所述的方法，其中，所述终端设备的定时误差和/或频率误差用于所述网络设备对所述第一上行信号进行定时调整和/或频率调整。
  11. 根据权利要求1-9中任一项所述的方法，其中，所述方法还包括：
    所述终端设备接收来自所述网络设备的第二下行信号；其中，所述第二下行信号包含基于所述终端设备的定时误差和/或频率误差确定的调整命令；
    所述终端设备对所述第二下行信号的反射信号进行调制，并基于所述调整命令对所述反射信号进行定时调整和/或频率调整，得到第二上行信号，向所述网络设备发送所述第二上行信号。
  12. 根据权利要求1-11中任一项所述的方法，其中，所述第一下行信号与所述第一上行信号采用相同的频点。
  13. 一种同步控制方法，包括：
    网络设备向终端设备发送第一下行信号；其中，所述第一下行信号的反射信号用于调制得到第一上行信号；
    所述网络设备接收来自所述终端设备的所述第一上行信号；其中，所述第一上行信号由所述终端设备调制携带同步信息，所述同步信息用于获得所述终端设备的定时误差和/或频率误差。
  14. 根据权利要求13所述的方法，其中，所述第一上行信号是基于同步信号序列对所述反射信号进行调制后得到的。
  15. 根据权利要求14所述的方法，其中，所述第一上行信号是基于幅度调制方式、频率调制方式或相位调制方式将所述同步信号序列调制到所述反射信号上得到的。
  16. 根据权利要求14或15所述的方法，其中，所述同步信号序列包括PN序列、DFT序列或CAZAC序列。
  17. 根据权利要求16所述的方法，其中，所述PN序列包括M序列或Gold序列。
  18. 根据权利要求13-17中任一项所述的方法，其中，所述第一上行信号是基于上行信息对所述反射信号进行调制后得到的。
  19. 根据权利要求18所述的方法，其中，所述第一上行信号是基于副载波调制的方式，将所述上行信息调制到已基于同步信号序列进行调制的反射信号上得到的。
  20. 根据权利要求18所述的方法，其中，所述上行信息与所述同步信息以时分复用的方式调制在所述反射信号上。
  21. 根据权利要求18-20中任一项所述的方法，其中，所述上行信息包括以下信息中的至少一个：
    上行数据；
    用于指示所述第一下行信号中的下行数据是否成功接收的上行反馈控制信息；
    所述终端设备的标识信息。
  22. 根据权利要求13-21中任一项所述的方法，其中，所述方法还包括：
    所述网络设备基于所述终端设备的定时误差和/或频率误差，对所述第一上行信号进行定时调整和/或频率调整。
  23. 根据权利要求13-21中任一项所述的方法，其中，所述方法还包括：
    所述网络设备向所述终端设备发送第二下行信号；
    其中，所述第二下行信号包含基于所述终端设备的定时误差和/或频率误差确定的调整命令，所述调整命令用于所述终端设备对所述第二下行信号的反射信号进行定时调整和/或频率调整，得到第二上行信号。
  24. 根据权利要求13-23中任一项所述的方法，其中，所述第一下行信号与所述第一上行信号采用相同的频点。
  25. 一种终端设备，包括：
    第一接收模块，用于接收来自网络设备的第一下行信号；
    第一处理模块，用于对所述第一下行信号的反射信号进行调制，得到第一上行信号；
    第一发送模块，用于向所述网络设备发送所述第一上行信号；其中，所述第一上行信号由所述终端设备调制携带同步信息，所述同步信息用于获得所述终端设备的定时误差和/或频率误差。
  26. 根据权利要求25所述的终端设备，其中，所述第一处理模块包括：
    同步信号调制单元，用于基于同步信号序列对所述反射信号进行调制。
  27. 根据权利要求26所述的终端设备，其中，所述同步信号调制单元具体用于：
    基于幅度调制方式、频率调制方式或相位调制方式将所述同步信号序列调制到所述反射信号上。
  28. 根据权利要求26或27所述的终端设备，其中，所述同步信号序列包括PN序列、DFT序列或CAZAC序列。
  29. 根据权利要求28所述的终端设备，其中，所述PN序列包括M序列或Gold序列。
  30. 根据权利要求25-29中任一项所述的终端设备，其中，所述第一处理模块包括：
    上行信息调制单元，用于基于上行信息对所述反射信号进行调制。
  31. 根据权利要求30所述的终端设备，其中，所述上行信息调制单元具体用于：
    基于副载波调制的方式，将所述上行信息调制到已基于同步信号序列进行调制的反射信号上。
  32. 根据权利要求30所述的终端设备，其中，所述上行信息与所述同步信息以时分复用的方式调制在所述反射信号上。
  33. 根据权利要求30-32中任一项所述的终端设备，其中，所述上行信息包括以下信息中的至少一个：
    上行数据；
    用于指示所述第一下行信号中的下行数据是否成功接收的上行反馈控制信息；
    所述终端设备的标识信息。
  34. 根据权利要求25-33中任一项所述的终端设备，其中，所述终端设备的定时误差和/或频率误差用于所述网络设备对所述第一上行信号进行定时调整和/或频率调整。
  35. 根据权利要求25-33中任一项所述的终端设备，其中，
    所述第一接收模块还用于：接收来自所述网络设备的第二下行信号；其中，所述第二下行信号包含基于所述终端设备的定时误差和/或频率误差确定的调整命令；
    所述第一处理模块还用于：对所述第二下行信号的反射信号进行调制，并基于所述调整命令对所述反射信号进行定时调整和/或频率调整，得到第二上行信号；
    所述第一发送模块还用于：向所述网络设备发送所述第二上行信号。
  36. 根据权利要求25-35中任一项所述的终端设备，其中，所述第一下行信号与所述第一上行信号采用相同的频点。
  37. 一种网络设备，包括：
    第二发送模块，用于向终端设备发送第一下行信号；其中，所述第一下行信号的反射信号用于调制得到第一上行信号；
    第二接收模块，用于接收来自所述终端设备的所述第一上行信号；其中，所述第一上行信号由所述终端设备调制携带同步信息，所述同步信息用于获得所述终端设备的定时误差和/或频率误差。
  38. 根据权利要求37所述的网络设备，其中，所述第一上行信号是基于同步信号序列对所述反射信号进行调制后得到的。
  39. 根据权利要求38所述的网络设备，其中，所述第一上行信号是基于幅度调制方式、频率调制方式或相位调制方式将所述同步信号序列调制到所述反射信号上得到的。
  40. 根据权利要求38或39所述的网络设备，其中，所述同步信号序列包括PN序列、DFT序列或CAZAC序列。
  41. 根据权利要求40所述的网络设备，其中，所述PN序列包括M序列或Gold序列。
  42. 根据权利要求37-41中任一项所述的网络设备，其中，所述第一上行信号是基于上行信息对所述反射信号进行调制后得到的。
  43. 根据权利要求42所述的网络设备，其中，所述第一上行信号是基于副载波调制的方式，将所述上行信息调制到已基于同步信号序列进行调制的反射信号上得到的。
  44. 根据权利要求42所述的网络设备，其中，所述上行信息与所述同步信息以时分复用的方式调制在所述反射信号上。
  45. 根据权利要求42-44中任一项所述的网络设备，其中，所述上行信息包括以下信息中的至少一个：
    上行数据；
    用于指示所述第一下行信号中的下行数据是否成功接收的上行反馈控制信息；
    所述终端设备的标识信息。
  46. 根据权利要求37-45中任一项所述的网络设备，其中，所述网络设备还包括：
    第二处理模块，用于基于所述终端设备的定时误差和/或频率误差，对所述第一上行信号进行定时调整和/或频率调整。
  47. 根据权利要求37-45中任一项所述的网络设备，其中，所述第二发送模块还用于：向所述终端设备发送第二下行信号；
    其中，所述第二下行信号包含基于所述终端设备的定时误差和/或频率误差确定的调整命令，所述调整命令用于所述终端设备对所述第二下行信号的反射信号进行定时调整和/或频率调整，得到第二上行信号。
  48. 根据权利要求37-47中任一项所述的网络设备，其中，所述第一下行信号与所述第一上行信号采用相同的频点。
  49. 一种终端设备，包括：处理器和存储器，所述存储器用于存储计算机程序，所述处理器调用并运行所述存储器中存储的计算机程序，执行如权利要求1至12中任一项所述的方法的步骤。
  50. 一种网络设备，包括：处理器和存储器，所述存储器用于存储计算机程序，所述处理器调用并运行所述存储器中存储的计算机程序，执行如权利要求13至24中任一项所述的方法的步骤。
  51. 一种芯片，包括：
    处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行如权利要求1至24中任一项所述的方法的步骤。
  52. 一种计算机可读存储介质，用于存储计算机程序，其中，
    所述计算机程序使得计算机执行如权利要求1至24中任一项所述的方法的步骤。
  53. 一种计算机程序产品，包括计算机程序指令，其中，
    所述计算机程序指令使得计算机执行如权利要求1至24中任一项所述的方法的步骤。
  54. 一种计算机程序，所述计算机程序使得计算机执行如权利要求1至24中任一项所述的方法的步骤。
  55. 一种通信系统，包括：
    终端设备，用于执行如权利要求1至12中任一项所述的方法；
    网络设备，用于执行如权利要求13至24中任一项所述的方法。
PCT/CN2022/073276 2022-01-21 2022-01-21 同步控制方法、终端设备、网络设备、芯片和存储介质 Ceased WO2023137718A1 (zh)

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