Wireless communication method and communication device

Abstract

Provided are a wireless communication method and a communication device. The method comprises: a first device receives a first signal sent by a second device, wherein the first signal carries first information and second information, the first information is used for indicating a time-domain starting position for transmission from the second device to the first device, and the second information comprises data and / or control information, wherein the time unit (TU) length of the first information is different from the chip length of the second information, and / or the transmission waveform of the first information is different from that of the second information. In embodiments of the present application, the TU length of first information is different from the transmission chip length of second information, and / or the transmission waveform of the first information is different from that of the second information, such that a first device can distinguish the first information from the second information, thereby improving the success rate of transmitting a first signal.

Description

Method and communication device for wireless communication TECHNICAL FIELD

[0001] The present application relates to the field of communication technology, and more particularly, to a method and a communication device for wireless communication. BACKGROUND

[0002] In some scenarios, a first signal is introduced with first information and second information, where the first information is used to indicate a time domain starting position of a transmission from a second device to a first device, and the second information includes data and / or control information, which can be carried by a physical reader to device channel (PRDCH). For the first device, it can not be able to correctly receive the first information and the second information. Taking the first information as a start-indicator (SI) and the second information including data or control information as an example, the first device can not be able to accurately distinguish the first information and the second information in the first signal, resulting in a failure of the first signal reception.

[0003] SUMMARY

[0004] The present application provides a method and a communication device for wireless communication. The following introduces each aspect of the present application.

[0005] In a first aspect, a method for wireless communication is provided, comprising: receiving, by a first device, a first signal sent by a second device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of a transmission from the second device to the first device, and the second information including data and / or control information; wherein a time unit (TU) length of the first information is different from a chip length of the second information, and / or a transmission waveform of the first information is different from a transmission waveform of the second information.

[0006] In a second aspect, a method for wireless communication is provided, comprising: receiving, by a first device, a first signal sent by a second device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of a transmission from the second device to the first device, and the third information being used for time or frequency synchronization; wherein a level of the first information is different from a level of the third information, and / or a transmission waveform of the first information is different from a transmission waveform of the third information.

[0007] In a third aspect, a method of wireless communication is provided that includes a second device transmitting a first signal to a first device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of a transmission by the second device to the first device, and the second information being used to carry data and / or control information; wherein a transmission unit, TU, length of the first information is different from a chip length of the second information, and / or a waveform of the first information is different from a waveform of the second information.

[0008] In a fourth aspect, a method of wireless communication is provided that includes a second device transmitting a first signal to a first device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of a transmission by the second device to the first device, and the third information being used for time or frequency synchronization; wherein a level of the first information is different from a level of the third information, and / or a transmission waveform of the first information is different from a transmission waveform of the third information.

[0009] In a fifth aspect, a communication device is provided that is a first device, comprising a receiving unit configured to receive a first signal transmitted by a second device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of a transmission by the second device to the first device, and the second information including data and / or control information; wherein a time unit, TU, length of the first information is different from a chip length of the second information, and / or a transmission waveform of the first information is different from a transmission waveform of the second information.

[0010] In a sixth aspect, a communication device is provided that is a first device, comprising a receiving unit configured to receive a first signal transmitted by a second device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of a transmission by the second device to the first device, and the third information being used for time or frequency synchronization; wherein a level of the first information is different from a level of the third information, and / or a transmission waveform of the first information is different from a transmission waveform of the third information.

[0011] In a seventh aspect, a communication device is provided that is a second device, comprising a transmitting unit configured to transmit a first signal to a first device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of a transmission by the second device to the first device, and the second information being used to carry data and / or control information; wherein a transmission unit, TU, length of the first information is different from a chip length of the second information, and / or a waveform of the first information is different from a waveform of the second information.

[0012] In an eighth aspect, a communication device is provided, the communication device being a second device, comprising: a sending unit configured to send a first signal to a first device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of a transmission from the second device to the first device, and the second information being used for time or frequency synchronization; wherein a level of the first information is different from a level of the third information, and / or a transmission waveform of the first information is different from a transmission waveform of the third information.

[0013] In a ninth aspect, a communication device is provided, comprising a processor, a memory, and a communication interface, the memory being configured to store one or more computer programs, and the processor being configured to invoke the computer programs in the memory, so that the communication device performs some or all of the steps in the methods of the various aspects described above.

[0014] In a tenth aspect, the embodiments of the present application provide a communication system, which comprises the terminal device and / or the network device described above. In another possible design, the system can further comprise other devices interacting with the terminal device or the network device in the solutions provided by the embodiments of the present application.

[0015] In an eleventh aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program, and the computer program causes a communication device (for example, a terminal device or a network device) to perform some or all of the steps in the methods of the various aspects described above.

[0016] In a twelfth aspect, the embodiments of the present application provide a computer program product, which comprises a non-transitory computer readable storage medium storing a computer program, and the computer program is operable to cause a communication device (for example, a terminal device or a network device) to perform some or all of the steps in the methods of the various aspects described above. In some implementations, the computer program product can be a software installation package.

[0017] In a thirteenth aspect, the embodiments of the present application provide a chip, which comprises a memory and a processor, and the processor can invoke and run a computer program from the memory, to implement some or all of the steps described in the methods of the various aspects described above.

[0018] In the embodiments of the present application, the time unit (TU) length of the first information is different from the transmission chip length of the second information, and / or the transmission waveform of the first information is different from the transmission waveform of the second information, which helps the first device to distinguish the first information and the second information, so as to improve the success rate of transmitting the first signal. BRIEF DESCRIPTION OF DRAWINGS

[0019] FIG. 1 is a wireless communication system to which the embodiments of the present application are applied.

[0020] Figure 2 shows a possible structure of the energy harvesting module.

[0021] Figure 3 shows the principle of backscatter communication according to an embodiment of the application.

[0022] Figure 4 shows a circuit diagram of a terminal based on resistance load modulation technology.

[0023] Figures 5-6 are architecture diagrams of a low-power Internet of Things based on a cellular network to which embodiments of the application are applicable.

[0024] Figure 7 shows a schematic diagram of the signal structure in R2D transmission according to an embodiment of the application.

[0025] Figure 8 is a schematic diagram of Manchester coding.

[0026] Figure 9 is a schematic flowchart of a method of wireless communication according to an embodiment of the application.

[0027] Figures 10A, 10B and 10C are schematic diagrams of first and second parts of information according to an embodiment of the application.

[0028] Figures 11A, 11B and 11C are schematic diagrams of first and second parts of information according to another embodiment of the application.

[0029] Figures 12A, 12B and 12C are schematic diagrams of first and second parts of information according to another embodiment of the application.

[0030] Figures 13A, 13B and 13C are schematic diagrams of first and second parts of information according to another embodiment of the application.

[0031] Figure 14 is a schematic diagram of a transmission waveform of first information according to an embodiment of the application, taking the case of a low level as an example.

[0032] Figure 15 is a schematic diagram of a transmission waveform of first information according to an embodiment of the application, taking the case of a high level as an example.

[0033] Figures 16A and 16B are schematic diagrams of a circuit implementing a scheme for transmitting first information at a negative level or a positive level according to an embodiment of the application.

[0034] Figures 17 and 18 are schematic diagrams of transmission waveforms of first and third information according to an embodiment of the application.

[0035] Figures 19-24 are schematic diagrams of transmission waveforms of first information according to an embodiment of the application.

[0036] Figure 25 is a schematic diagram of a communication device according to an embodiment of the application.

[0037] FIG. 26 is a schematic diagram of a communication device according to an embodiment of the present application.

[0038] FIG. 27 is a schematic diagram of a communication device according to an embodiment of the present application.

[0039] FIG. 28 is a schematic diagram of a communication device according to an embodiment of the present application.

[0040] FIG. 29 is a schematic diagram of a communication device according to an embodiment of the present application. DETAILED DESCRIPTION

[0041] The technical solutions in the present application will be described below with reference to the accompanying drawings.

[0042] Ambient Internet of Things (A-IoT)

[0043] A-IoT communication adopts energy harvesting and backscattering communication technology. An A-IoT device refers to an IoT device that is driven by various environmental energies such as wireless radio frequency energy, light energy, solar energy, thermal energy, mechanical energy, and the like. Such a device can have no energy storage capability or can have very limited energy storage capability (such as using a capacitor with a capacity of tens of microfarads (uF)). Compared with a traditional internet of things (IoT) device, an A-IoT device has many advantages such as no conventional battery, no maintenance, small size, low complexity, low cost, long service life, and the like.

[0044] In an embodiment of the present application, an A-IoT device can also be referred to as a zero-power device.

[0045] An ambient internet of things can include a network device 110 and an A-IoT device 120, as shown in FIG. 1. The network device is used to send a wireless energy supply signal, a downlink communication signal to the A-IoT device, and receive a backscattering signal of the A-IoT device. A basic A-IoT device includes an energy harvesting module, a backscattering communication module, and a low-power computing module. In addition, the A-IoT device can also have a memory or a sensor for storing some basic information (such as an article identifier) or obtaining environmental temperature, environmental humidity, and the like.

[0046] It should be noted that FIG. 1 exemplarily shows one network device and one A-IoT device. Alternatively, the communication system 100 can include a plurality of network devices, and each network device can include other numbers of A-IoT devices within its coverage range, which is not limited in the embodiments of the present application.

[0047] In addition, in some implementations, the communication system 100 can further include a network controller, a mobile management entity, and other network entities, which are not limited herein.

[0048] It should be understood that the technical solutions of the embodiments of the present application can be applied to various communication systems, for example, a 5th generation (5G) system or new radio (NR), a long term evolution (LTE) system, an LTE frequency division duplex (FDD) system, an LTE time division duplex (TDD), a cellular Internet of Things (IoT), and the like. The technical solutions provided by the present application can also be applied to future communication systems, such as a 6th generation mobile communication system, and the like.

[0049] The A-IoT device in the embodiments of the present application can be a terminal device, which can also be referred to as a user equipment (UE), an access terminal, a user unit, a user station, a mobile station, a mobile station (MS), a mobile terminal (MT), a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent, or a user apparatus. The terminal device in the embodiments of the present application can be a device that provides voice and / or data connectivity for a user, and can be used to connect people, things, and machines, such as household appliances with wireless connection functions, sensors, electronic tags, and the like. The terminal in the embodiments of the present application can be a wireless terminal in a smart home, a wireless terminal in an IWSN, a wireless terminal in smart logistics and smart warehousing, a wireless terminal in self driving, a wireless terminal in remote medical surgery, a wireless terminal in a smart grid, a wireless terminal in transportation safety, a wireless terminal in a smart city, and the like.

[0050] The network device in the embodiments of the present application can be a device for communicating with a terminal device. If the terminal is an electronic tag, the network device can be a reader / writer (for example, a reader / writer based on radio frequency identification (RFID) technology) for reading and writing the electronic tag. The network device can also be an access network device or a radio access network device, for example, the network device can be a base station. The network device in the embodiments of the present application can refer to a radio access network (RAN) node (or device) for accessing a terminal device to a wireless network. The base station can broadly cover various names in the following or be replaced by the following names, such as: Node B (NodeB), evolved Node B (eNB), next generation Node B (gNB), relay station, access point, transmitting and receiving point (TRP), transmitting point (TP), master station MeNB, auxiliary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node, wireless node, access point (AP), transmission node, transceiver node, baseband unit (BBU), remote radio unit (RRU), active antenna unit (AAU), remote radio head (RRH), central unit (CU), distributed unit (DU), positioning node, etc. The base station can be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof. The base station can also refer to a communication module, modem, or chip for being arranged in the foregoing devices or apparatuses. The base station can also be a mobile switching center and a device for device-to-device (D2D), vehicle-to-everything (V2X), machine-to-machine (M2M) communication, a network side device in a 6G network, a device for a base station function in a future communication system, etc. The base station can support networks of the same or different access technologies. The embodiments of the present application do not limit the specific technology and specific device form adopted by the network device.

[0051] A base station can be fixed or mobile. For example, a helicopter or an unmanned aerial vehicle (UAV) can be configured to function as a mobile base station, and one or more cells can move according to the location of the mobile base station. In other examples, a helicopter or an unmanned aerial vehicle can be configured to function as a device that communicates with another base station.

[0052] In some deployments, the network device in the embodiments of the present application can refer to a CU or a DU, or the network device includes a CU and a DU. The gNB can also include an AAU.

[0053] The network device and the terminal device can be deployed on land, including indoors or outdoors, handheld or vehicle-mounted; can also be deployed on the water surface; and can also be deployed on aircraft, balloons and satellites in the air. The scenarios in which the network device and the terminal device are located are not limited in the embodiments of the present application.

[0054] It should be understood that all or part of the functions of the communication device in the present application can also be implemented by software functions running on hardware, or by virtualized functions instantiated on a platform (such as a cloud platform).

[0055] In some implementations, the terminal 120 can include an energy harvesting module 121 and a backscatter communication module 122. The energy harvesting module 121 and the backscatter communication module 122 will be described below in conjunction with FIGS. 2 to 4, and will not be described again here for brevity. In some cases, the terminal 120 can also include a low-power computing module 123. The low-power computing module 123 is configured to provide computing functions for the terminal, such as data processing and the like. In other cases, the terminal 120 can also include a sensor 124 configured to collect external information (such as ambient temperature, ambient humidity, and the like). In other cases, the terminal 120 can also include a memory 125 configured to store some information (such as external information collected by the above-mentioned sensor, or an article identifier, and the like).

[0056] The energy harvesting module 121 described above is configured to harvest energy. In some implementations, energy can be harvested through a wireless energy supply signal transmitted by the network device. The wireless energy supply signal can be a “radio frequency signal” transmitted by the network device, and therefore the energy harvesting module is also referred to as a “radio frequency energy harvesting module”.

[0057] Figure 2 shows a possible structure of the energy harvesting module. As shown in Figure 2, the energy harvesting module 121 can harvest the energy of the spatial electromagnetic wave of the radio frequency signal based on the principle of electromagnetic induction, and store the harvested energy in the capacitor C, i.e., the process of charging the capacitor C. When the charging process of the capacitor C is completed, the capacitor C can start discharging to provide energy for the terminal to work. For example, the discharging of the capacitor C can be used to drive the terminal to perform low-power demodulation on the data transmitted by the network device. For another example, the discharging of the capacitor C can be used to drive the terminal to modulate the data to be transmitted. For another example, the discharging of the capacitor C can be used to drive the sensor of the terminal to perform data acquisition. For another example, the discharging of the capacitor C can be used to drive the terminal to read the data in the memory 125, etc.

[0058] The above-mentioned backscattering communication module 122 is used for backscattering communication between the terminal and the network device. The principle of backscattering communication of the embodiments of the present application will be described below in conjunction with Figure 3. Referring to Figure 3, the terminal 120 receives the wireless signal transmitted by the network device 110, and modulates the wireless signal to load the information to be transmitted. Finally, the modulated signal is radiated from the antenna, and this information transmission process is called backscattering communication. The backscattering communication and the load modulation function are inseparable. The load modulation adjusts and controls the circuit parameters of the oscillation loop of the terminal according to the beat of the data stream, so that the size of the impedance and other parameters of the terminal change, thereby completing the modulation process. The load modulation technology mainly includes resistance load modulation and capacitance load modulation. In resistance load modulation, a resistance is connected in parallel with the load, and the resistance is turned on or off based on the control of the binary data stream, as shown in Figure 4 below. The on-off of the resistance will cause the change of the circuit voltage, so as to realize amplitude-shift keying (ASK) modulation, i.e., the modulation and transmission of the signal are realized by adjusting the amplitude of the backscattering signal of the terminal. Similarly, in capacitance load modulation, the on-off of the capacitance can realize the change of the circuit resonance frequency, and realize frequency-shift keying (FSK) modulation, i.e., the modulation and transmission of the signal are realized by adjusting the working frequency of the backscattering signal of the terminal.

[0059] In some implementations, other devices can also be provided on the transport (TX) path of the network device 110 for processing the signal to be transmitted, such as an amplifier (AMP) and the like. Other devices can also be provided on the receive (RX) path of the network device 110 for processing the received signal, such as a low noise amplifier (LNA) and the like.

[0060] In some implementations, terminal 120 may be equipped with an energy harvesting unit for harvesting energy from the wireless power supply signal sent by the network device. Of course, terminal 120 may also include a logic processing unit to perform corresponding calculation functions.

[0061] It should be noted that, whether it is network device 110 or terminal 120, Figure 3 only shows the connection structure of the signal processing circuit as an example. The processing circuit of network device 110 and / or terminal 120 may contain other components, and this application embodiment does not specifically limit this.

[0062] Typically, load modulation can be implemented using either resistive load modulation or capacitive load modulation. Figure 4 shows a circuit diagram of a terminal based on resistive load modulation technology. It should be noted that the circuit in Figure 4 implements load modulation in a manner similar to existing circuits for implementing load modulation. For simplicity, the functions of resistors R2 and R3, capacitors C1 and C2, and inductors L1 and L2 shown in Figure 4 will not be elaborated further.

[0063] In resistive load modulation, a resistor R can be connected in parallel with the load. L The switch S can be controlled based on binary data stream to achieve the resistor R. L The resistor R is switched on or off. L Switching the circuit on and off will cause changes in the circuit voltage, and the changes in the circuit voltage can control the amplitude of the backscattered signal of the terminal, thereby achieving modulation of the backscattered signal, that is, ASK modulation of the backscattered signal.

[0064] Similarly, in capacitive load modulation, the switching of the capacitor can be controlled based on the binary data stream to change the circuit resonant frequency, thereby changing the operating frequency of the backscattered signal to achieve FSK modulation.

[0065] As described above, the terminal can use load modulation to modulate the incoming signal (i.e., the signal sent by the network device), thereby realizing the backscatter communication process. Therefore, the terminal in backscatter communication typically has the following advantages.

[0066] One advantage is that since the terminal does not need to actively transmit signals, there is no need to construct a complex radio frequency (RF) path. For example, the RF path does not need to include power amplifiers (PAs) or RF filters, thus reducing the cost and size of the terminal.

[0067] The second advantage is that since the terminal does not need to actively generate high-frequency signals, it does not need a high-frequency crystal oscillator, thus reducing the cost and size of the terminal.

[0068] Advantage three, since the terminal can communicate with the network device by using backscattering technology, the terminal consumes less energy when communicating, and even does not need to consume its own energy.

[0069] Classification of A-IoT devices

[0070] In some scenarios, A-IoT devices can be classified into three categories based on their energy sources and the way energy is used: passive A-IoT devices, semi-passive A-IoT devices, and active A-IoT devices.

[0071] I. Passive A-IoT devices

[0072] A passive A-IoT device usually does not need to be equipped with a battery. When the A-IoT device is close to the network device, the A-IoT device is within the near field formed by the antenna radiation of the network device, at this time, the antenna of the A-IoT device can generate induced current through electromagnetic induction, and the induced current can power the A-IoT device to achieve demodulation of the received signal, and / or modulation, coding, and other work on the to-be-transmitted signal. In some implementations, the passive A-IoT device described above can be an electronic tag, and correspondingly, the network device can be a reader / writer of a radio frequency identification (RFID) system, for reading the content in the electronic tag and / or for changing the content in the electronic tag.

[0073] II. Semi-passive A-IoT devices

[0074] A semi-passive A-IoT device also does not install a conventional battery itself, but can use an energy harvesting module 121 to harvest wireless wave energy, and store the harvested energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can power the A-IoT device to achieve demodulation of the received signal, and / or modulation, coding, and other work on the to-be-transmitted signal.

[0075] III. Active A-IoT devices

[0076] An active A-IoT device can be equipped with a battery. The battery can power the A-IoT device to achieve demodulation of the received signal, and / or modulation, coding, and other work on the to-be-transmitted signal. However, when the A-IoT device communicates by using backscattering technology, the A-IoT device does not need to consume the energy of the battery. Therefore, for such an A-IoT device, "zero power consumption" mainly refers to the scenario in which the terminal communicates by using backscattering technology.

[0077] In some implementations, the active A-IoT device described above can be an electronic tag, and the network device can be an RFID reader, at this time, the built-in battery can supply power to the RFID chip in the A-IoT device to increase the read-write distance between the RFID reader and the electronic tag. On the other hand, the built-in battery can supply power to the RFID chip in the A-IoT device to shorten the read-write delay of the RFID reader to the electronic tag, which is conducive to improving the reliability of communication.

[0078] In other scenarios, A-IoT devices can be divided into the following three categories based on the transmitter type.

[0079] Device type 1: with peak power consumption of several micro-watts (~1 μW), with energy storage capability, initial sampling frequency offset (SFO) up to 10 X ppm(parts per million), without downlink amplifier and without uplink amplifier, uplink transmission through backscatter of carrier wave.

[0080] Device type 2a: with peak power consumption of less than or equal to several hundred micro-watts (≤a few hundred μW), with energy storage capability, initial sampling frequency offset (SFO) up to 10 X ppm(parts per million), with downlink amplifier and / or with uplink amplifier, uplink transmission through backscatter of carrier wave.

[0081] Device type 2b: with peak power consumption of less than or equal to several hundred micro-watts (μW), with energy storage capability, initial sampling frequency offset (SFO) up to 10 X ppm(parts per million), with downlink amplifier and / or with uplink amplifier, uplink transmission through internal generation (generated internally), which can also be referred to as based on active transmission.

[0082] Low-power Internet of Things based on cellular network

[0083] The cellular Internet of Things is booming, and 3GPP has standardized Internet of Things technologies such as narrow band Internet of Things (NB-IoT), machine type communication (MTC), reduced capability (RedCap), etc., but there are still many Internet of Things communication needs in various scenarios that cannot be met using existing technologies, for example: harsh communication environments (high temperature, extremely low temperature, high humidity, high pressure, high radiation, or high-speed movement, etc.), extremely small terminal form factor requirements, extremely low cost, etc.

[0084] Therefore, in order to cover these unmet Internet of Things communication needs, ultra-low cost, extremely small size, battery-free / maintenance-free Internet of Things are also needed in the cellular network, and the environmental Internet of Things can exactly meet this demand.

[0085] Based on the discussion of A-IoT application scenarios in 3GPP system architecture (SA) 1, A-IoT can be used in at least the following four scenarios:

[0086] · Object recognition, such as logistics, production line product management, and supply chain management.

[0087] · Environmental monitoring, such as temperature, humidity, and harmful gas monitoring of working and natural environments.

[0088] · Positioning, such as indoor positioning, intelligent lost item finding, and production line item positioning.

[0089] · Intelligent control, such as intelligent control of various appliances in smart homes (turning on / off air conditioners, adjusting temperature), and intelligent control of various facilities in agricultural greenhouses (automatic irrigation, fertilization).

[0090] In the low-power Internet of Things based on a cellular network, A-IoT devices can directly receive carriers, data, or signals from a base station and send or backscatter data or signals to the base station, as shown in FIG. 5 (referred to as the first topology). Alternatively, communication between A-IoT and the base station is implemented through an intermediate node, in which case the intermediate node sends carriers, data, or signals to the A-IoT device, and the A-IoT device sends or backscatters data or signals to the intermediate node, as shown in FIG. 6 (referred to as the second topology).

[0091] In some scenarios, the architecture shown in FIG. 5 and FIG. 6, the network devices can be collectively referred to as "readers", the A-IoT devices can be referred to as "devices", the transmission from the readers to the devices is referred to as reader-to-device (R2D) transmission, and the transmission from the devices to the readers is referred to as device-to-reader (D2R) transmission.

[0092] Signal structure in R2D transmission

[0093] In some implementations, the structure of the R2D transmission can include a preamble, data and / or control information, and a postamble, as shown in FIG. 7.

[0094] In some implementations, the preamble is used to indicate the time-domain starting position of the R2D transmission, and / or is used for the device (e.g., A-IoT device) to acquire time synchronization or frequency synchronization information. Continuing to refer to FIG. 7, the preamble can include an SI and a clock-acquisition part (CAP). It should be understood that the preamble part can also include other parts, which are not limited by the embodiments of the present application.

[0095] In some implementations, the SI is used to indicate the time-domain starting position of the R2D transmission.

[0096] In some implementations, the CAP is used for the device to acquire time synchronization or frequency synchronization, and / or is used to indicate the chip length or chip duration. Wherein, the frequency synchronization includes, for example, sampling frequency synchronization, carrier frequency synchronization.

[0097] In some implementations, the CAP can indicate the chip length of the starting part of a physical reader-to-device channel (PRDCH) after the CAP, and / or the starting point of the starting part. Hereinafter, unless otherwise specified, the chip length of the PRDCH at least contains the chip length of the starting part.

[0098] In some implementations, the chip lengths of different parts in the same PRDCH can be the same or different.

[0099] In some implementations, the data and / or control information described above can include data and / or control information transmitted by the reader to the device. In some implementations, the data and control information can be carried over the same channel. In some implementations, the data and control information can be carried over the PRDCH. For example, the control information can be carried over a portion of the information bits of the PRDCH, or the control information can be carried in the form of a media access control control element (MAC CE) along with the data over the PRDCH. For another example, the data can be carried over the PRDCH, and the control information can be transmitted before the channel carrying the data information. For another example, the data can be carried over the PRDCH, and the control information can be multiplexed in the channel carrying the data information. Of course, in some embodiments of the present application, the data information and the control information can be carried over different channels.

[0100] In some implementations, the control information and the data can use different cyclic redundancy check (CRC) codes. Of course, in some embodiments of the present application, the control information and the data can be processed with the same cyclic redundancy check code.

[0101] In some implementations, the end symbol described above can be used for one or more of the following: indicating the end of the PRDCH, synchronization, channel measurement, interference measurement. It should be understood that in some embodiments of the present application, the end symbol is optional information, i.e., the end symbol can or can not be included in the R2D transmission.

[0102] In some implementations, the R2D transmission can use Manchester encoding or Pulse-interval encoding (PIE). For Manchester encoding, as shown in FIG. 8, typically bit 0 -> {chip 1, chip 0}; bit 1 -> {chip 0, chip 1}. Here, 1 represents a high level and 0 represents a low level. In one implementation, a threshold value is used to determine the high level or the low level, e.g., if the detected value exceeds the threshold, it is a high level, and if the detected value is below the threshold, it is a low level.

[0103] In some scenarios, the first signal includes first information and second information, where the first information is used for the time domain starting position of the transmission from the second device to the first device, and the second information is used to carry data and / or control information. For the first device, it can not be able to correctly receive the first information and the second information. Taking the first information as SI and the second information including data or control information as an example, the first device can not be able to accurately distinguish the first information and the second information in the first signal, resulting in a failure of the first signal reception.

[0104] Therefore, to solve the above problems, the embodiment of the present application provides a method for wireless communication, in which the time unit TU length of the first information is different from the transmission chip length of the second information, and / or the transmission waveform of the first information is different from the transmission waveform of the second information, which helps the first device to distinguish the first information and the second information, so as to improve the success rate of transmitting the first signal. The method for wireless communication of the embodiment of the present application is described below in combination with FIG. 9. The method shown in FIG. 9 includes step S910.

[0105] In step S910, the second device transmits the first signal to the first device.

[0106] In some implementations, the first device can be the zero-power device or the A-IoT device described above. In other implementations, the second device can be the reader or the network device described above.

[0107] In some scenarios, the first device can be referred to as a "device", and the second device can be referred to as a "reader". Correspondingly, the transmission process of the first signal is also referred to as an R2D transmission process. The first signal is also referred to as an R2D signal.

[0108] In some implementations, the first signal carries the first information and the second information. The first information can be, for example, the SI described above. Correspondingly, the second information can be the data or the control information described above. Of course, in the embodiment of the present application, the first information and the second information can also be other information with the same or similar functions.

[0109] The TU length of the first information is different from the transmission chip length of the second information, and / or the transmission waveform of the first information is different from the transmission waveform of the second information. This is described below in combination with Embodiment 1 and Embodiment 2.

[0110] Embodiment 1: The transmission waveform of the first information is different from the transmission waveform of the second information.

[0111] Generally, the transmission waveform is affected by one or more of the following factors: the number of levels corresponding to the information, the change mode of different levels corresponding to the information, and the time length corresponding to different levels. The design mode of the waveform of the first information in the embodiment of the present application is described below in combination with Examples 1-4.

[0112] Example 1: The first information includes first part information and second part information, the transmission length of the first part information is different from the transmission length of the second part information, and the level of the first part information is different from the level of the second part information.

[0113] In some embodiments, the transmission length of the first part of information can be understood as a time duration of the first part of information, and / or the transmission length of the second part of information can be understood as a time duration of the second part of information.

[0114] Generally, the transmission waveform of the second information (e.g., the transmission waveform after being encoded in the Manchester mode) can include the first part of information and the second part of information with different levels, and the transmission length of the first part of information and the transmission length of the second part of information are the same. Therefore, in the embodiments of the present application, by setting the transmission length of the first part of information different from the transmission length of the second part of information, and the level of the first part of information different from the level of the second part of information, the transmission waveform of the first information can be distinguished from the transmission waveform of the second information, so as to improve the accuracy of the first device in distinguishing the first information and the second information.

[0115] In the embodiments of the present application, the transmission length of the first part of information and the transmission length of the second part of information are not limited. For example, the transmission length of the first part of information is greater than the transmission length of the second part of information. For another example, the transmission length of the first part of information is less than the transmission length of the second part of information. For another example, the transmission length of the first part of information is in a proportional relationship with the transmission length of the second part of information, which helps to reduce the complexity of the first device in receiving the first part of information and the second part of information.

[0116] In some embodiments, the proportional relationship includes one of the following: the transmission length of the second part of information is 1.5 times the transmission length of the first part of information; the transmission length of the second part of information is 2.5 times the transmission length of the first part of information; the transmission length of the second part of information is 3 times the transmission length of the first part of information; the transmission length of the first part of information is 1.5 times the transmission length of the second part of information; the transmission length of the first part of information is 2.5 times the transmission length of the second part of information; the transmission length of the first part of information is 3 times the transmission length of the second part of information.

[0117] Of course, the proportional relationship is not limited in the embodiments of the present application. In some embodiments, the proportional relationship can also be other proportional relationships except 1:1. For example, the transmission length of the second part of information is 4 times the transmission length of the first part of information. For another example, the transmission length of the second part of information is 4.3 times the transmission length of the first part of information.

[0118] In some embodiments, the first part of information is earlier than the second part of information in the time domain, the level of the first part of information is a low level, and the level of the second part of information is a high level. Compared with the energy supply signal based on the high level transmission, it is helpful for the first device to distinguish the functional signal from the first information based on the level of the first part of information.

[0119] It should be noted that, in order to form the low level of the first part of information, a high level signal should be transmitted before the first part of information, but this part of high level signal is not used for the identification of SI.

[0120] In some other embodiments, the first part of information is earlier than the second part of information in time domain, the level of the first part of information is high level, and the level of the second part of information is low level. Compared with the energy supply signal based on high level transmission, it is helpful for the first device to distinguish the function signal from the first information based on the transmission waveform of the first information.

[0121] It should be noted that, in order to form the high level of the first part of information, a low level should exist before the first part of information, but this part of low level is not used for the identification of SI.

[0122] Of course, in the embodiments of the present application, the level of the first part of information can be negative level, wherein the voltage of the negative level can be lower than or equal to the low level in the transmission of the second information, and the level of the second part of information can be positive level. Or the level of the first part of information can be positive level, wherein the positive level can be higher than or equal to the high level in the transmission of the second information, and the level of the second part of information can be negative level, which is not limited in the embodiments of the present application.

[0123] In order to facilitate understanding, the transmission waveform of the first information in the embodiments of the present application is introduced below in combination with FIG. 10A to FIG. 10C, taking the first information as SI, the first part of information as low level, and the second part of information as high level as an example. Referring to FIG. 10A, the transmission length of the second part of information is 1.5 times of the transmission length of the first part of information. Referring to FIG. 10B, the transmission length of the second part of information is 2.5 times of the transmission length of the first part of information. Referring to FIG. 10C, the transmission length of the second part of information is 3 times of the transmission length of the first part of information.

[0124] In order to facilitate understanding, the transmission waveform of the first information in the embodiments of the present application is introduced below in combination with FIG. 11A to FIG. 11C, taking the first information as SI, the first part of information as low level, and the second part of information as high level as an example. Referring to FIG. 11A, the transmission length of the first part of information is 1.5 times of the transmission length of the second part of information. Referring to FIG. 11B, the transmission length of the first part of information is 2.5 times of the transmission length of the second part of information. Referring to FIG. 11C, the transmission length of the first part of information is 3 times of the transmission length of the second part of information.

[0125] The transmission waveform of the first information in the embodiments of the present application is introduced below with the first information being SI, and the first part of information being high level and the second part of information being low level as an example. Referring to FIG. 12A, the transmission length of the second part of information is 1.5 times the transmission length of the first part of information. Referring to FIG. 12B, the transmission length of the second part of information is 2.5 times the transmission length of the first part of information. Referring to FIG. 12C, the transmission length of the second part of information is 3 times the transmission length of the first part of information.

[0126] The transmission waveform of the first information in the embodiments of the present application is introduced below with the first information being SI, and the first part of information being high level and the second part of information being low level as an example. Referring to FIG. 13A, the transmission length of the first part of information is 1.5 times the transmission length of the second part of information. Referring to FIG. 13B, the transmission length of the first part of information is 2.5 times the transmission length of the second part of information. Referring to FIG. 13C, the transmission length of the first part of information is 3 times the transmission length of the second part of information.

[0127] As introduced above, the first information can be roughly divided into two transmission modes. In mode 1, the first part of information can be transmitted in low level, and the second part of information can be transmitted in high level. In mode 2, the first part of information can be transmitted in high level, and the second part of information can be transmitted in low level. In some implementation modes, the first device can be pre-defined or pre-configured with the transmission mode of the first information to be preferentially detected, for example, the first device can determine to detect the first information according to mode 1 based on pre-defined information or pre-configured information. For another example, the first device can determine to detect the first information according to mode 2 based on pre-defined information or pre-configured information.

[0128] In another implementation mode, the first device can determine the transmission mode of the first information based on whether the energy supply signal can be detected. For example, if the first device can detect the energy supply signal, the transmission mode of the first information is mode 1, and accordingly, the first device can detect the first information based on mode 1. For another example, if the first device cannot detect the energy supply signal, the transmission mode of the first information is mode 2, and accordingly, the first device can detect the first information based on mode 2.

[0129] That is to say, the transmission mode of the first information can be determined based on whether the energy supply signal exists in the environment. For example, if the energy supply signal exists in the environment, the transmission mode of the first information is mode 1. For another example, if the energy supply signal does not exist in the environment, the transmission mode of the first information is mode 2.

[0130] Example 2: The levels of the first information include a plurality of levels, and each level in the plurality of levels is different.

[0131] Generally, the transmission waveform of the second information (e.g., the transmission waveform after being encoded in the Manchester manner) can include a first part of information transmitted at a high level and a second part of information transmitted at a low level, and the transmission length of the first part of information and the transmission length of the second part of information are the same. Therefore, in the embodiment of the present application, by setting the levels of the first information to include a plurality of mutually different levels, the transmission waveform of the first information is different from the transmission waveform of the second information, so as to improve the accuracy of the first device in distinguishing the first information and the second information.

[0132] In some implementations, the values of the plurality of levels gradually increase in the direction of increasing time, or in other words, the values of the plurality of levels gradually increase in the direction of increasing time. In the embodiment of the present application, the increasing manner of the values of the plurality of levels is not limited. For example, the values of the plurality of levels increase in the direction of increasing time. This will be introduced below in conjunction with FIG. 14. For another example, the values of the plurality of levels can increase in different changing amounts in the direction of increasing time.

[0133] In some implementations, the values of the plurality of levels gradually decrease in the direction of increasing time, or in other words, the values of the plurality of levels gradually decrease in the direction of increasing time. In the embodiment of the present application, the decreasing manner of the values of the plurality of levels is not limited. For example, the values of the plurality of levels decrease in the direction of increasing time. This will be introduced below in conjunction with FIG. 15. For another example, the values of the plurality of levels can decrease in different changing amounts in the direction of increasing time.

[0134] In some implementations, a first level in the plurality of levels can not be used for identification of the first information; and / or the first level is a reference level for identifying other levels, wherein the time domain position corresponding to the first level is earlier than the time domain positions corresponding to the other levels, and the other levels are levels in the plurality of levels other than the first level, for example, the first level can be the first level in FIG. 14 or FIG. 15. That is, the level in the plurality of levels corresponding to the earliest time domain position is the first level, and accordingly, the information corresponding to the first level is not used for identification of the first information, and the first level can be used as a reference level for identifying other levels.

[0135] As described above, the first level is not used for identification of the first information, and therefore, the transmission length corresponding to the first level is not limited. At this time, the second device can send the second level from the beginning of the time domain unit (e.g., time domain symbol), wherein the second level is a level in the plurality of levels adjacent to the first level in the time domain position. That is, the TU of the first information can ignore the transmission length of the first level, or in other words, the TU length of the first information can be the sum of the transmission lengths corresponding to the levels in the plurality of levels other than the first level.

[0136] In some embodiments, the first level can be the minimum value of the plurality of levels. For example, the first level can be a level corresponding to no transmission of information, in which case the first level is approximately 0, which helps the first device to distinguish the first information from the energizing signal transmitted at a high level. In other embodiments, the first level can be the maximum value of the plurality of levels. For example, the first level can be a high level corresponding to the energizing signal.

[0137] In the embodiments of the present application, the transmission length corresponding to each level of the plurality of levels is not limited. In some embodiments, the transmission length corresponding to each level of the plurality of levels is the same, that is, the transmission length of the information transmitted at each level of the plurality of levels is the same. In other embodiments, the transmission length corresponding to each level of the plurality of levels is different, that is, the transmission length of the information transmitted at each level of the plurality of levels is different.

[0138] In addition, in the embodiments of the present application, the number of the plurality of levels is not limited. In some embodiments, the number of the plurality of levels can be a positive integer greater than or equal to 3. For example, the number of the plurality of levels can be 3. For example, the number of the plurality of levels can be 4. For example, the number of the plurality of levels can be 5.

[0139] For ease of understanding, the first information in the embodiments of the present application is described below with reference to FIG. 14, taking the first level as a low level as an example. Referring to FIG. 14, it is assumed that the first information is SI, and accordingly, SI is transmitted at three levels in ascending order, in which the second level is obtained by increasing a variable 1 based on the first level, and the third level is obtained by increasing the variable 1 based on the second level. The variable 1 can be predefined, preconfigured, or configured by a network device.

[0140] In some embodiments, the first level is not used for identification of SI, and the first level can be used as a reference level for identification of the second level and the third level. Referring to FIG. 14, the first level can be a level corresponding to no transmission of information, in which case the first level is approximately 0, which helps the first device to distinguish the first information from the energizing signal transmitted at a high level.

[0141] In some embodiments, the transmission length corresponding to the first level is not limited. However, the transmission length corresponding to the second level and the transmission length corresponding to the third level can include one or more TUs. It should be understood that in the embodiments of the present application, the transmission length corresponding to a level can be understood as the transmission length of the information transmitted at the level.

[0142] In some embodiments, the reader can transmit part of the first information at the second level from the beginning of one OFDM symbol.

[0143] In the following, the first information in the embodiments of the present application is described by taking the first level as a high level as an example in combination with FIG. 15. Referring to FIG. 15, it is assumed that the first information is SI, and accordingly, the SI is transmitted at three levels in turn decreasing, in which the second level is obtained by decreasing a variable 2 based on the first level, and the third level is obtained by decreasing the variable 2 based on the second level. The variable 2 can be predefined, preconfigured or configured by a network device.

[0144] In some embodiments, the first level is not used for identification of the SI, and the first level can be used as a reference level for identification of the second level and the third level. Referring to FIG. 15, the first level can be, for example, a level corresponding to no transmission of information, and in this case, the value of the first level is close to 0, which is helpful for the first device to distinguish the first information and the energizing signal transmitted at a high level.

[0145] In some embodiments, the transmission length corresponding to the first level is not limited. The transmission length corresponding to the second level and the transmission length corresponding to the third level can include one or more TUs. It should be understood that in the embodiments of the present application, the transmission length corresponding to a level can be understood as the transmission length of the information transmitted at the level.

[0146] In some embodiments, the reader can transmit part of the first information at the second level from the beginning of one OFDM symbol.

[0147] Example 3: The TU length of the first information is a first length, and the first length is different from the chip length of the second information.

[0148] In some embodiments, the TU length of the first information can correspond to one or more chip lengths of the first information, or in other words, the TU of the first information can include one or more chips.

[0149] Generally, the transmission waveform of the second information can include first part information transmitted at a high level and second part information transmitted at a low level, and the transmission length of the first part information and the transmission length of the second part information are the same. Therefore, in the embodiments of the present application, by setting the TU length of the first information as a first length different from the chip length of the second information, the transmission waveform of the first information is different from the transmission waveform of the second information, so as to improve the accuracy of the first device in distinguishing the first information and the second information.

[0150] In some embodiments, the first length being different from the chip length of the second information can include that a difference between the first length and the chip length of the second information is greater than a first threshold, which helps to improve the distinction between the TU of the first information and the chip length of the second information, so as to facilitate the first device to distinguish the first information from the second information.

[0151] In the embodiments of the present application, the first threshold can be predefined, preconfigured or configured by a network device.

[0152] In some embodiments, the level of the first information is one of the following: a negative level; a positive level; a high level; and a low level.

[0153] In the embodiments of the present application, the implementation of the scheme of transmitting the first information at the negative level or the positive level is not limited. A possible implementation circuit is introduced below in combination with FIG. 16A and FIG. 16B.

[0154] Referring to FIG. 16A, when the first information is transmitted at the negative level, it can be understood that the first information is a negative voltage baseband signal, which can be detected by a circuit similar to that shown in FIG. 16A. In the circuit shown in FIG. 16A, when the input is a negative voltage, the diode is turned on, and the output end generates a current, and vice versa, the output end has no current.

[0155] Referring to FIG. 16B, when the first information is transmitted at the positive level, it can be understood that the first information is a positive voltage baseband signal, which can be detected by a circuit similar to that shown in FIG. 16B. The difference between the circuit shown in FIG. 16B and the circuit shown in FIG. 16A is that the diode is positive. In the circuit shown in FIG. 16B, when the input is a positive voltage, the diode is turned on, and the output end generates a current, and vice versa, the output end has no current.

[0156] In some embodiments, the first signal includes third information for time or frequency synchronization, wherein the third information can be the CAP introduced above, and of course, in the embodiments of the present application, the third information can also be other information having the same or similar functions. Accordingly, in order for the first device to distinguish the first information from the third information, the level of transmitting the first information and the level of transmitting the third information can be different. For example, the first information is transmitted at the negative level, and the third information is transmitted at the high level. For another example, the first information is transmitted at the positive level, and the third information is transmitted at the low level. This is introduced below in combination with FIG. 17 and FIG. 18.

[0157] In some embodiments, the minimum value of the number of chips of the second information that can be transmitted in one time domain unit (for example, a time domain symbol) is determined based on whether the rising edge or the falling edge corresponding to the first information is the same or not and the CP type corresponding to the first information, wherein the CP type includes a normal CP and an extended CP.

[0158] In some embodiments, the first value corresponding to the minimum value contains an even number, and the second value corresponding to the minimum value contains an odd number.

[0159] Generally, the CP is to copy the signal at the tail of the time domain unit where the first signal is transmitted to the head. In some scenarios, the rising edge or the falling edge corresponding to the copied signal can be different from the rising edge or the falling edge at the head of the original signal. In this case, the device can identify the error rising edge or the error falling edge possibly generated by the CP, and thus remove the error rising edge or the error falling edge. Therefore, in the embodiments of the present application, if the error rising edge or the error falling edge possibly generated by the CP is removed by the device (i.e., the first device), the first value can be used. Conversely, if the error rising edge or the error falling edge possibly generated by the CP is not removed by the device, the second value can be used. In this case, since the second value corresponding to the minimum value contains an odd number, the second device needs to add one chip in the encoding process (the encoding process is usually based on an even number of chips), and the added chip can be the same as the original rising edge or the original falling edge at the head of the signal. In this case, when the added chip is copied to the head of the signal, the device will no longer identify the error rising edge or the error falling edge generated by the CP.

[0160] For ease of understanding, Table 1 shows the value mode of the minimum value in the embodiments of the present application. Referring to Table 1, the minimum value is denoted as M min . If the subcarrier spacing is 15 kHz, the value of the first M min is 2, and the value of the second M min is 3. If the subcarrier spacing is 30 kHz, the value of the first M min is 1, and the value of the second M min is 1. If the subcarrier spacing is 60 kHz, the value of the first M min is 1, and the value of the second M min is 1.

[0161] Table 1

[0162] In the embodiments of the present application, the value of the minimum value can be predefined, preconfigured, or configured by a network device.

[0163] For ease of understanding, the transmission waveform of the first information in the embodiments of the present application is introduced below in combination with FIG. 17 to FIG. 20. Referring to FIG. 17, it is assumed that the first information is SI, and the third information is CAP, where the SI is transmitted in a negative level, and the TU length of the SI is a first length. Correspondingly, the third information includes four chips, and the first chip (i.e., the chip adjacent to the first information in the time domain) of the four chips is in a high level, the second chip is in a low level, the third chip is in a high level, and the fourth chip is in a low level.

[0164] Referring to Figure 18, assume the first information is SI and the third information is CAP, where SI is transmitted at a positive level and the TU length of SI is the first length. Accordingly, the third information includes 4 chips, and the first chip (i.e., the chip adjacent to the first information in the time domain) is low, the second chip is high, the third chip is low, and the fourth chip is high.

[0165] Referring to Figure 19, assuming the first information is SI, SI can be a transmission length of... The low level, and the minimum number of PRDCH chips M contained in an OFDM symbol. min It should be less than a specific value to ensure that the maximum chip length of the PRDCH is less than a certain value. A specific length. For example, This can represent the length of an OFDM symbol including the CP at a subcarrier spacing of 15 kHz, where M min The values ​​are shown in Table 1. Among them, when the rising or falling edge error that CP may generate is removed by the device, the first M method can be used. min The method of obtaining the value is as follows; otherwise, the second method, M, can be used. min Value retrieval method.

[0166] In this embodiment, the transmission waveform of the first information is suitable for scenarios where a power supply signal is transmitted at a high level. Furthermore, since the first length of SI differs from the chip length of the second information, the first device can avoid misidentifying PRDCH as SI. Moreover, the difference between the transmission waveforms of the first and second information helps improve the detection performance of SI.

[0167] Referring to Figure 20, assume the first information is SI, and SI can be of length . The high level, while the minimum number of PRDCH chips M contained in an OFDM symbol. min It should be less than a specific value to ensure that the maximum chip length of the PRDCH is less than a certain value. A specific range. For example, This can represent the length of an OFDM symbol including the CP at a subcarrier spacing of 15 kHz. In this case, M min The values ​​are shown in Table 1. Among them, when the rising or falling edge error that CP may generate is removed by the device, the first M method can be used. min The method of obtaining the value is as follows; otherwise, the second method, M, can be used. min Value retrieval method.

[0168] In this embodiment, since the first length of SI is different from the chip length of the second information, the first device can avoid misidentifying PRDCH as SI. Furthermore, the different transmission waveforms of the first and second information help improve the detection performance of SI.

[0169] Example 4: The TU of the first information contains multiple chips, and the chip length of one or more of the chips is different from the chip length of the second information.

[0170] Typically, the transmission waveform of the second information may include a first part of information transmitted at a high level and a second part of information transmitted at a low level, and the transmission length of the first part of information and the transmission length of the second part of information are the same. Therefore, in this embodiment, by setting one or more chip lengths corresponding to the first information to be different from the chip length of the second information, the transmission waveform of the second information can be distinguished, thereby improving the accuracy of the first device in distinguishing between the first information and the second information.

[0171] In some implementations, the chip length of one or more chips among the multiple chips is different from the chip length of the second information. This may include a difference between the chip length of one or more chips and the chip length of the second information that is greater than a second threshold. This helps to improve the distinction between the chip length of one or more chips corresponding to the first information and the chip length of the second information, so that the first device can distinguish between the first information and the second information.

[0172] In this embodiment of the application, the second threshold may be predefined, preconfigured, or configured by the network device.

[0173] In some implementations, two adjacent chips in the time domain correspond to different voltage levels, and two chips separated by one chip in the time domain correspond to the same voltage level. For example, the voltage levels of the multiple chips include both high and low levels. Accordingly, any two adjacent chips in the time domain can correspond to high and low voltage levels, respectively, and two chips separated by one chip in the time domain can both correspond to either low or high voltage levels. This will be explained below with reference to Figures 21 to 24.

[0174] In this embodiment, the voltage levels corresponding to the multiple chips are not limited. For example, the voltage levels corresponding to the multiple chips may include positive and negative voltage levels. As another example, the voltage levels corresponding to the multiple chips may include positive and low voltage levels. Yet another example, the voltage levels corresponding to the multiple chips may include negative and high voltage levels.

[0175] In some implementations, the earliest chip in the time domain corresponding to multiple chips can be a low-level chip; that is, the multiple chips corresponding to the first information can begin with a low-level chip. This low-level-starting first information is applicable to scenarios where there is a power supply signal transmitted at a high level. Accordingly, the first device can distinguish between the first information and the power supply signal based on the low level at the beginning of the first information, thereby improving the accuracy of the first device in identifying the first information. Of course, in the embodiments of this application, the earliest chip in the time domain corresponding to multiple chips can be a high-level chip; that is, the multiple chips corresponding to the first information can begin with a high-level chip.

[0176] In some implementations, the maximum number of chips of the second information that can be transmitted within a time-domain unit (e.g., a time-domain symbol) can be expressed as M. max The second information can be determined based on one or more of the following: a predefined method, a pre-configured method, or a network device configuration. Typically, the number of chips of second information that can be transmitted within a time-domain unit is inversely proportional to the chip length transmitted within that time-domain unit. Therefore, in this embodiment, the chip length of the second information can be limited by designing a maximum value for the number of chips to avoid the chip length of the second information being too small. The value of this maximum value can be found in the following description.

[0177] For ease of understanding, the transmission waveform of the first information in the embodiments of this application is described below with reference to Figures 21 to 24. Referring to Figure 21, assuming the first information is SI, SI can be a length starting with a low level. The information includes, and the first information may include two chips. Additionally, the maximum number of chips M of the second information contained within a single OFDM symbol is... max It should be less than a specific value to ensure that the maximum chip length of the second information is greater than a certain value. For example, The value of TU can be TU / 2. The value of TU can be selected according to the following text in conjunction with Table 2 or Table 3 to ensure the detection performance of SI.

[0178] Referring to Figure 22, assuming the first information is SI, SI can be a length starting with a low level. The information includes, and the first information may include four chips. Additionally, the maximum number of chips M of the second information contained within a single OFDM symbol is... max It should be less than a specific value to ensure that the maximum chip length of the second information is greater than a certain value. For example, The value of TU can be TU / 4. The value of TU can be selected according to the following text in conjunction with Table 2 or Table 3 to ensure the detection performance of SI.

[0179] Referring to Figure 23, assuming the first information is SI, SI can be a length starting from a high level. The information includes, and the first information may include two chips. Additionally, the maximum number of chips M of the second information contained within a single OFDM symbol is... max It should be less than a specific value to ensure that the maximum chip length of the second information is greater than a certain value. For example, The value of TU can be TU / 2. The value of TU can be selected according to the following text in conjunction with Table 2 or Table 3 to ensure the detection performance of SI.

[0180] Referring to Figure 24, assuming the first information is SI, SI can be a length starting from a high level. The information includes, and the first information may include four chips. Additionally, the maximum number of chips M of the second information contained within a single OFDM symbol is... max It should be less than a specific value to ensure that the maximum chip length of the second information is greater than a certain value. For example, The value of TU can be TU / 4. The value of TU can be selected according to the following text in conjunction with Table 2 or Table 3 to ensure the detection performance of SI.

[0181] Example 2: The TU length of the first information is different from the transmission chip length of the second information.

[0182] In this embodiment, the TU length of the first information is not limited. In some implementations, the TU length of the first information may be equal to the chip length of the first information. In other implementations, the TU length of the first information may be equal to the total length of the multiple chips corresponding to the first information.

[0183] In this embodiment of the application, by setting the TU length of the first information to be different from the length of the transmission chip of the second information, the first device can distinguish between the first information and the second information, thereby improving the success rate of the first device in detecting the first information.

[0184] In some scenarios, the solution described above in conjunction with Example 3 of Embodiment 1 can also be understood as an example of Embodiment 2. For further details, please refer to the description of Example 3. For the sake of brevity, further elaboration will not be provided here.

[0185] In some scenarios, in order to improve the success rate of the first device in detecting the first information, the transmission power of the first information is greater than that of the second information.

[0186] In the embodiments of this application, the above-described scheme regarding transmission power can be used in conjunction with any of the embodiments described above. In some implementations, the above-described scheme regarding transmission power can be used in conjunction with Example 2. For example, referring to Figure 17, when the first information is transmitted at a negative level, in order to improve the success rate of the first device detecting the first information, the transmission power of the first information can be greater than the transmission power of the second information. Of course, in the embodiments of this application, the above-described scheme regarding transmission power can be used in conjunction with Example 1, or the above-described scheme regarding transmission power can be used in conjunction with Example 3, or the above-described scheme regarding transmission power can be used in conjunction with Example 4. Alternatively, the above-described scheme regarding transmission power can be used in conjunction with Example 2.

[0187] In some scenarios, first information and third information are introduced for the first signal. The first information is used to indicate the start time position transmitted from the second device to the first device, and the third information is used for time or frequency synchronization. The first device may not be able to correctly receive the first and third information. For example, if the first information is SI and the third information is CAP, the first device may not be able to accurately distinguish between the first and third information in the first signal, leading to the failure to receive the first signal.

[0188] Therefore, in view of the above problems, another embodiment of this application provides a wireless communication method, in which the level of the first information and the level of the third information are set to be different, and / or the transmission waveform of the first information and the transmission waveform of the third information are different, which helps the first device to distinguish the first information and the third information, thereby improving the success rate of transmitting the first signal.

[0189] In some implementations, the voltage levels of the first and third information are different. This can be understood as follows: in the time domain, the first and third information are adjacent, and the first information precedes the third information. Therefore, the voltage level of the end portion of the first information is different from the voltage level of the beginning portion of the third information. Of course, in the embodiments of this application, the difference in voltage levels between the first and third information can be understood as assuming that the first information is transmitted at a certain voltage level, and the voltage level of the first information is different from the voltage level of the beginning portion of the third information.

[0190] In some implementations, the time-adjacent levels of the first and third information satisfy one of the following: the level of the first information is high and the level of the third information is low; the level of the first information is low and the level of the third information is high; the first information is negative and the level of the third information is high; the first information is positive and the level of the third information is low (for example, see Figure 18).

[0191] Taking a high-level signal corresponding to the first piece of information and a low-level signal corresponding to the third piece of information as an example, in some implementations, the first piece of information ends with a high level and the third piece of information begins with a low level. In other words, the end portion of the first piece of information has a high level, and the beginning portion of the third piece of information has a low level. For example, as shown in Figure 21 or Figure 22, the latest chip in the time domain of the first piece of information is transmitted with a high level, and the earliest chip in the time domain of the third piece of information is transmitted with a low level.

[0192] Taking the first information level as low and the third information level as high as an example, in some implementations, the first information ends with a low level and the third information begins with a high level. In other words, the level of the information at the end of the first information is low, and the level of the information at the beginning of the third information is high. For example, as shown in Figure 23 or Figure 24, the latest chip in the time domain of the first information is transmitted with a low level, and the earliest chip in the time domain of the third information is transmitted with a high level.

[0193] Taking the first information as a negative level and the third information as a high level as an example, in some implementations, the first information ends with a negative level and the third information begins with a high level. In other words, the level of the information at the end of the first information is negative, and the level of the information at the beginning of the third information is high. For example, as shown in Figure 17, the first information is transmitted with a negative level in the time domain, and the earliest chip in the third information is transmitted with a high level in the time domain.

[0194] Taking the first information as a positive level and the third information as a low level as an example, in some implementations, the first information ends with a positive level and the third information begins with a low level. In other words, the level of the information at the end of the first information is positive, and the level of the information at the beginning of the third information is low. For example, as shown in Figure 18, the first information is transmitted at a positive level in the time domain, and the earliest chip in the third information is transmitted at a negative level in the time domain.

[0195] In some implementations, the transmission waveforms of the first information and the third information are different. This may include the first information having a TU length of a first length, and the first length being different from the chip length of the third information. For example, the difference between the first length and the chip length of the third information is greater than a third threshold, which helps to improve the distinction between the TU of the first information and the chip length of the third information, so that the first device can distinguish between the first information and the third information.

[0196] In this embodiment, the third threshold can be predefined, preconfigured, or configured by the network device. Furthermore, in this embodiment, the level of the first information is not limited. In some implementations, the level of the first information is one of the following: negative level; positive level; high level; low level.

[0197] For example, referring to Figure 17, assume the first information is SI and the third information is CAP, where SI is transmitted at a negative level and the TU length of SI is the first length. Accordingly, the third information includes 4 chips, and the first chip (i.e., the chip adjacent to the first information in the time domain) is high, the second chip is low, the third chip is high, and the fourth chip is low.

[0198] Referring to Figure 18, assume the first information is SI and the third information is CAP, where SI is transmitted at a positive level and the TU length of SI is the first length. Accordingly, the third information includes 4 chips, and the first chip (i.e., the chip adjacent to the first information in the time domain) is low, the second chip is high, the third chip is low, and the fourth chip is high.

[0199] In some implementations, the TU of the first information contains multiple chips, and the chip length of one or more of these chips differs from the chip length of the third information. For example, if the difference between the chip length of one or more of these chips and the chip length of the third information is greater than a fourth threshold, this helps to improve the distinction between the chip length of the one or more chips corresponding to the first information and the chip length of the third information, so that the first device can distinguish between the first information and the third information.

[0200] In this embodiment of the application, the fourth threshold may be predefined, preconfigured, or configured by the network device.

[0201] In some implementations, two adjacent chips in the time domain correspond to different voltage levels, and two chips separated by one chip in the time domain correspond to the same voltage level. For example, the voltage levels of the multiple chips include both high and low levels. Accordingly, any two adjacent chips in the time domain can correspond to high and low voltage levels, respectively, and two chips separated by one chip in the time domain can both correspond to either low or high voltage levels. For further details, please refer to Figures 23 or 24.

[0202] The first information in the embodiments of this application has been introduced above. The following describes how the TU length of the first information in the embodiments of this application is determined.

[0203] Value selection method 1: The TU length of the first information is determined based on the length of the time domain unit corresponding to the subcarrier interval corresponding to the first information, the CP type, the inclusion relationship between the time domain unit corresponding to the subcarrier interval corresponding to the first information and the CP, and the maximum value of the number of chips of the second information transmitted in a time domain unit.

[0204] In this embodiment, the TU length of the first information is determined based on the length of the time-domain unit corresponding to the subcarrier interval corresponding to the first information, the CP type, the inclusion relationship between the time-domain unit corresponding to the subcarrier interval corresponding to the first information and the CP, and the maximum value of the number of chips transmitting the second information within a time-domain unit, which helps to simplify the complexity of detecting the first information.

[0205] In implementation 1-1, if the time-domain unit corresponding to the subcarrier interval does not include the length of the CP, the TU length L of the first information TU Through formula L TU =L / M max Where L represents the length of the time-domain unit excluding CP, and M max This represents the maximum number of chips of the second information that can be transmitted within a time-domain unit.

[0206] Taking the time-domain unit as the OFDM symbol as an example, the above formula can be expressed as: TU = L / M max Where L is the length of the OFDM symbol excluding the CP when the subcarrier spacing is 30kHz, 15kHz, or 60kHz, and M... max The TU is the maximum number of chips of second information that can be transmitted within a predefined OFDM symbol. This parameter can be related to the subcarrier spacing. Correspondingly, TU can be expressed as 2048k·2. ―μ ·T c / M max T c =1 / (Δf) max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, μ=0,1 or 2, which are subcarrier spacing indices, corresponding to subcarrier spacing of 15kHz, 30kHz or 60kHz respectively.

[0207] In some implementations, L can represent the time-domain unit length (excluding the time-domain length of the CP) corresponding to a subcarrier spacing of 60kHz. The time-domain unit can be, for example, an OFDM symbol, corresponding to μ = 2. Because the time-domain unit length is shortest in this case, and the time-domain unit lengths corresponding to subcarrier spacings of 15kHz and 30kHz are integer multiples of the 60kHz subcarrier spacing, the TU length of the first information determined based on L may be well applicable to all possible subcarrier spacings.

[0208] In some implementations, L can represent the time-domain unit length (excluding the time-domain length of the CP) corresponding to a subcarrier spacing of 30kHz. The time-domain unit can be, for example, an OFDM symbol, corresponding to μ = 1. In some scenarios, the carrier containing the second information may not support a 60kHz subcarrier spacing. Even if it does, the OFDM symbol length for a 30kHz subcarrier spacing may fall between 15kHz and 60kHz subcarrier spacing. A longer TU length helps improve the detection performance of the second information. Therefore, the TU length of the first information determined based on L may achieve a better balance between detection performance and applicability.

[0209] In some implementations, the time-domain unit length (excluding the time-domain length of the CP) can be represented when the subcarrier spacing is 30kHz. The time-domain unit can be, for example, an OFDM symbol, corresponding to μ = 0. Determining the TU length of the first information based on this L helps to maximize the TU length, thereby improving the detection performance of the first information.

[0210] In implementation methods 1-2, if the time-domain unit corresponding to the subcarrier interval includes the length of the CP, the TU length L of the first information TU Through formula L TU =L CP / M max , where L CP M represents the length of the time-domain unit containing the regular CP. max This represents the maximum number of chips of the second information that can be transmitted within a time-domain unit.

[0211] Taking the time-domain unit as the OFDM symbol as an example, the above formula can be expressed as: TU = L CP / M max L CP M represents the length of the shortest OFDM symbol including the conventional CP when the subcarrier spacing is 30kHz, 15kHz, or 60kHz. max This is the maximum number of chips of the second information that can be transmitted within a predefined OFDM symbol. Correspondingly, TU can be expressed as (2048+144)·k·2. ―μ ·T c / M max , among which, T c =1 / (Δf) max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, μ=0, 1 or 2 represent the subcarrier spacing index, corresponding to a subcarrier spacing of 15kHz, 30kHz or 60kHz respectively.

[0212] In some implementations, the TU length corresponding to the first information transmitted based on extended CP is the same as the TU length corresponding to the first information transmitted based on regular CP, which helps to simplify the complexity of detecting the first information when it is transmitted based on extended CP. In other implementations, the TU length of the first information is determined based on the time domain length of regular CP and the time domain length of extended CP. For example, the first information can be defined as being between (2048+144)·k·2 ―μ ·T c / M max and (2048+512)·k·2 ―μ ·T c / M max The values ​​between, where M max T represents the maximum number of chips of the second information that can be transmitted within a time-domain unit. c =1 / (Δf) max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, μ represents the subcarrier spacing index.

[0213] In this embodiment, the two values ​​are the TU length calculated in the scenario with a regular CP and the TU length calculated in the scenario with an extended CP. By setting the TU length to be within this range, the TU length calculated in the scenario with a regular CP can be made close to the TU length calculated in the scenario with an extended CP. Since the detection accuracy of the first information does not need to be too high, this setting method can simplify the complexity of detecting the first information.

[0214] Value retrieval method 2: TU length L of the first information TU Through formula L TU =A·k·T c , among which, T c =1(Δf max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, and A can take the value of 64, 68.5, or 70.

[0215] In this embodiment, the TU length of the first information is determined in a way that is independent of the subcarrier spacing, which makes it more applicable to all carrier configurations.

[0216] In some implementations, the maximum number of chips transmitting second information within a time-domain unit is determined based on whether the CP type corresponding to the first information and the rising or falling edge corresponding to the first information are the same.

[0217] In some implementations, the first possible value for the maximum value includes even numbers, and the second possible value for the maximum value includes odd numbers. This will be explained below with reference to Tables 2 and 3.

[0218] Typically, the CP (Concurrent Phase) is constructed by copying the signal at the end of the time-domain unit transmitting the first signal to the beginning. In some scenarios, the rising or falling edge of the copied signal may differ from the rising or falling edge at the beginning of the original signal. In this case, the device will identify the erroneous rising or falling edge that the CP may generate and remove it. Therefore, in this embodiment, if the erroneous rising or falling edge that the CP may generate is removed by the device (i.e., the first device), the first value can be used. Conversely, if the erroneous rising or falling edge that the CP may generate is not removed by the device, the second value can be used. In this case, since the second value corresponding to the maximum value contains an odd number, the second device needs to add a chip during the encoding process (the encoding process is usually based on an even number of chips). The added chip can be the same as the rising or falling edge at the beginning of the original signal. In this case, when the added chip is copied to the beginning of the signal, the device will no longer identify the erroneous rising or falling edge generated by the CP.

[0219] Typically, M max The value of M and the subcarrier spacing determine the minimum length of the second information chip. A smaller chip length results in a higher data rate for the second information, but may lead to a decrease in detection performance. Therefore, to achieve a better balance between the data rate and detection reliability of the second information, M can be defined according to Table 2 or 3 for different subcarrier spacings. max The former value better guarantees the transmission rate of the second information, while the latter better guarantees the detection performance of the second information. Specifically, when the device removes any erroneous rising or falling edges that might be generated by the CP, the first value (M) can be used. max The value of M can be determined in one way; otherwise, the second method can be used. max The way to obtain the value.

[0220] As shown in Table 2, the maximum value is represented by M. max If the subcarrier spacing is 15kHz, then the first type M... max The value of M is 8, the second type. max The value is 7. If the subcarrier spacing is 30kHz, then the first type M... max The value of M is 4, the second type. maxThe value is 5. If the subcarrier spacing is 60kHz, then the first type M... max The value of M is 2, the second type max The value of is 3.

[0221] Table 2

[0222] As shown in Table 3, the maximum value is represented by M. max If the subcarrier spacing is 15kHz, then the first type M... max The value of M is 4, the second type. max The value is 5. If the subcarrier spacing is 30kHz, then the first type M... max The value of M is 2, the second type max The value is 3. If the subcarrier spacing is 60kHz, then the first type M... max The value of M is 1, the second type. max The value of is 1.

[0223] Table 3

[0224] The method embodiments of this application have been described in detail above with reference to Figures 1 to 24. The apparatus embodiments of this application will be described in detail below with reference to Figures 25 to 29. It should be understood that the descriptions of the method embodiments correspond to the descriptions of the apparatus embodiments; therefore, any parts not described in detail can be referred to the preceding method embodiments.

[0225] Figure 25 is a schematic diagram of a communication device according to an embodiment of this application. The communication device 2500 shown in Figure 25 is a first device, and the communication device 2500 includes: a receiving unit 2510.

[0226] The receiving unit 2510 is used to receive a first signal sent by the second device. The first signal carries first information and second information. The first information is used to indicate the time-domain start position of the transmission from the second device to the first device. The second information includes data and / or control information. The time unit TU length of the first information is different from the chip length of the second information, and / or the transmission waveform of the first information is different from the transmission waveform of the second information.

[0227] In some implementations, the first information includes a first part of information and a second part of information, wherein the transmission length of the first part of information and the transmission length of the second part of information are proportional, and the voltage levels of the first part of information and the second part of information are different.

[0228] In some implementations, the proportional relationship includes one of the following: the transmission length of the second part of the information is 1.5 times the transmission length of the first part of the information; the transmission length of the second part of the information is 2.5 times the transmission length of the first part of the information; the transmission length of the second part of the information is 3 times the transmission length of the first part of the information; the transmission length of the first part of the information is 1.5 times the transmission length of the second part of the information; the transmission length of the first part of the information is 2.5 times the transmission length of the second part of the information; and the transmission length of the first part of the information is 3 times the transmission length of the second part of the information.

[0229] In some implementations, the first part of the information is earlier than the second part of the information in the time domain, the level of the first part of the information is low, and the level of the second part of the information is high.

[0230] In some implementations, the first part of the information is earlier than the second part of the information in the time domain, the level of the first part of the information is high, and the level of the second part of the information is low.

[0231] In some implementations, the level of the first information includes multiple levels, each of which is different.

[0232] In some implementations, the values ​​of the multiple levels increase in the direction of time increase; or the values ​​of the multiple levels decrease in the direction of time increase.

[0233] In some implementations, the first level among the plurality of levels is not used for the identification of the first information; and / or the first level is a reference level for identifying other levels, wherein the time domain position corresponding to the first level is earlier than the time domain position corresponding to the other levels, and the other levels are levels other than the first level among the plurality of levels.

[0234] In some implementations, the TU length of the first information is a first length, and the difference between the first length and the chip length is greater than a first threshold.

[0235] In some implementations, the level of the first information is one of the following: negative level; positive level; high level; low level.

[0236] In some implementations, the first signal includes third information for time or frequency synchronization, wherein the first information is transmitted at a negative level and the third information is transmitted at a high level; or the first information is transmitted at a positive level and the third information is transmitted at a low level.

[0237] In some implementations, the minimum number of chips of the second information that can be transmitted within a time-domain unit is determined based on whether the cyclic prefix (CP) type corresponding to the first information is the same as the rising or falling edge of the first information. The CP type includes regular CP and extended CP.

[0238] In some implementations, the first value corresponding to the minimum value is an even number, and the second value corresponding to the minimum value is an odd number.

[0239] In some implementations, the TU of the first information contains multiple chips, and the difference between the chip length of one or more of the multiple chips and the chip length of the second information is greater than a second threshold.

[0240] In some implementations, two adjacent chips in the time domain have different voltage levels, and two chips separated by one chip in the time domain have the same voltage level.

[0241] In some implementations, the transmission power of the first information is greater than the transmission power of the second information.

[0242] In some implementations, the TU length of the first information is determined based on the length of the time-domain unit corresponding to the subcarrier interval corresponding to the first information, the CP type, the inclusion relationship between the time-domain unit corresponding to the subcarrier interval corresponding to the first information and the CP, and the maximum value of the number of chips transmitting the second information within a time-domain unit.

[0243] In some implementations, if the time-domain unit corresponding to the subcarrier interval does not include the length of the CP, the TU length L of the first information is... TU Through formula L TU =L / M max Where L represents the length of the time-domain unit excluding CP, and M max This represents the maximum number of chips of the second information that can be transmitted within a time-domain unit.

[0244] In some implementations, if the time-domain unit corresponding to the subcarrier interval includes the length of the CP, the TU length L of the first information is... TU Through formula L TU =L CP / M max , where L CP M represents the length of the time-domain unit containing the regular CP. max This represents the maximum number of chips of the second information that can be transmitted within a time-domain unit.

[0245] In some implementations, the TU length corresponding to the first information when transmitted based on extended CP is the same as the TU length corresponding to the first information when transmitted based on regular CP.

[0246] In some implementations, the TU length of the first information is determined based on the time-domain length of the conventional CP and the time-domain length of the extended CP.

[0247] In some implementations, the TU length of the first information is (2048+144)·k·2 ―μ ·T c / M max and (2048+512)·k·2 ―μ ·T c / M max The values ​​between, where M max T represents the maximum number of chips of the second information that can be transmitted within a time-domain unit. c =1 / (Δf) max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, μ represents the subcarrier spacing index.

[0248] In some implementations, the TU length L of the first information TU Through formula L TU =A·k·T c , among which, T c =1 / (Δf) max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, and A can take the value of 64, 68.5, or 70.

[0249] In some implementations, the maximum number of chips transmitting the second information within a time-domain unit is determined based on whether the CP type corresponding to the first information and the rising or falling edge corresponding to the first information are the same.

[0250] In some implementations, the first possible value corresponding to the maximum value includes even numbers, and the second possible value corresponding to the maximum value includes odd numbers.

[0251] Figure 26 is a schematic diagram of a communication device according to an embodiment of this application. The communication device 2600 shown in Figure 26 is a first device, and the communication device 2600 includes: a receiving unit 2610.

[0252] The receiving unit 2610 is used to receive a first signal sent by the second device. The first signal carries first information and third information. The first information is used to indicate the time-domain start position of the transmission from the second device to the first device, and the third information is used for time or frequency synchronization. The level of the first information is different from the level of the third information, and / or the transmission waveform of the first information is different from the transmission waveform of the third information.

[0253] In some implementations, the time-adjacent levels of the first and third information pieces satisfy one of the following: the level corresponding to the first information is high and the level corresponding to the third information is low; the level corresponding to the first information is low and the level corresponding to the third information is high; the level corresponding to the first information is negative and the level corresponding to the third information is high; or the level corresponding to the first information is positive and the level corresponding to the third information is low.

[0254] In some implementations, the TU length of the first information is a first length, and the difference between the first length and the chip length of the third information is greater than a third threshold.

[0255] In some implementations, the level of the first information is one of the following: negative level; positive level; high level; low level.

[0256] In some implementations, the TU of the first information contains multiple chips, and the difference between the chip length of one or more of the multiple chips and the chip length of the third information is greater than a fourth threshold.

[0257] In some implementations, two adjacent chips in the time domain have different voltage levels, and two chips separated by one chip in the time domain have the same voltage level.

[0258] Figure 27 is a schematic diagram of a communication device according to an embodiment of this application. The communication device 2700 shown in Figure 27 is a second device, and the communication device 2700 includes: a transmitting unit 2710.

[0259] The transmitting unit 2710 is used to transmit a first signal to a first device. The first signal carries first information and second information. The first information is used to indicate the time-domain start position of the transmission from the second device to the first device. The second information is used to carry data and / or control information. The transmission unit TU length of the first information is different from the chip length of the second information, and / or the waveform of the first information is different from the waveform of the second information.

[0260] In some implementations, the first information includes a first part of information and a second part of information, wherein the transmission length of the first part of information and the transmission length of the second part of information are proportional, and the voltage levels of the first part of information and the second part of information are different.

[0261] In some implementations, the proportional relationship includes one of the following: the transmission length of the second part of the information is 1.5 times the transmission length of the first part of the information; the transmission length of the second part of the information is 2.5 times the transmission length of the first part of the information; the transmission length of the second part of the information is 3 times the transmission length of the first part of the information; the transmission length of the first part of the information is 1.5 times the transmission length of the second part of the information; the transmission length of the first part of the information is 2.5 times the transmission length of the second part of the information; and the transmission length of the first part of the information is 3 times the transmission length of the second part of the information.

[0262] In some implementations, the first part of the information is earlier than the second part of the information in the time domain, the level of the first part of the information is low, and the level of the second part of the information is high.

[0263] In some implementations, the first part of the information is earlier than the second part of the information in the time domain, the level of the first part of the information is high, and the level of the second part of the information is low.

[0264] In some implementations, the level of the first information includes multiple levels, each of which is different.

[0265] In some implementations, the values ​​of the multiple levels increase in the direction of time increase; or the values ​​of the multiple levels decrease in the direction of time increase.

[0266] In some implementations, the first level among the plurality of levels is not used for the identification of the first information; and / or the first level is a reference level for identifying other levels, wherein the time domain position corresponding to the first level is earlier than the time domain position corresponding to the other levels, and the other levels are levels other than the first level among the plurality of levels.

[0267] In some implementations, the TU length of the first information is a first length, and the difference between the first length and the chip length is greater than a first threshold.

[0268] In some implementations, the level of the first information is one of the following: negative level; positive level; high level; low level.

[0269] In some implementations, the first signal includes third information for time or frequency synchronization, wherein the first information is transmitted at a negative level and the third information is transmitted at a high level; or the first information is transmitted at a positive level and the third information is transmitted at a low level.

[0270] In some implementations, the minimum number of chips of the second information that can be transmitted within a time-domain unit is determined based on whether the cyclic prefix (CP) type corresponding to the first information is the same as the rising or falling edge of the first information. The CP type includes regular CP and extended CP.

[0271] In some implementations, the first value corresponding to the minimum value is an even number, and the second value corresponding to the minimum value is an odd number.

[0272] In some implementations, the TU of the first information contains multiple chips, and the difference between the chip length of one or more of the multiple chips and the chip length of the second information is greater than a second threshold.

[0273] In some implementations, two adjacent chips in the time domain have different voltage levels, and two chips separated by one chip in the time domain have the same voltage level.

[0274] In some implementations, the transmission power of the first information is greater than the transmission power of the second information.

[0275] In some implementations, the TU length of the first information is determined based on the length of the time-domain unit corresponding to the subcarrier interval corresponding to the first information, the CP type, the inclusion relationship between the time-domain unit corresponding to the subcarrier interval corresponding to the first information and the CP, and the maximum value of the number of chips transmitting the second information within a time-domain unit.

[0276] In some implementations, if the time-domain unit corresponding to the subcarrier interval does not include the length of the CP, the TU length L of the first information is... TU Through formula L TU =L / M max Where L represents the length of the time-domain unit excluding CP, and M max This represents the maximum number of chips of the second information that can be transmitted within a time-domain unit.

[0277] In some implementations, if the time-domain unit corresponding to the subcarrier interval includes the length of the CP, the TU length L of the first information is... TU Through formula L TU =L CP / M max , where L CPM represents the length of the time-domain unit containing the regular CP. max This represents the maximum number of chips of the second information that can be transmitted within a time-domain unit.

[0278] In some implementations, the TU length corresponding to the first information when transmitted based on extended CP is the same as the TU length corresponding to the first information when transmitted based on regular CP.

[0279] In some implementations, the TU length of the first information is determined based on the time-domain length of the conventional CP and the time-domain length of the extended CP.

[0280] In some implementations, the TU length of the first information is (2048+144)·k·2 ―μ ·T c / M max and (2048+512)·k·2 ―μ ·T c / M max The values ​​between, where M max T represents the maximum number of chips of the second information that can be transmitted within a time-domain unit. c =1 / (Δf) max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, μ represents the subcarrier spacing index.

[0281] In some implementations, the TU length L of the first information TU Through formula L TU =A·k·T c , among which, T c =1 / (Δf) max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, and A can take the value of 64, 68.5, or 70.

[0282] In some implementations, the maximum number of chips transmitting the second information within a time-domain unit is determined based on whether the CP type corresponding to the first information and the rising or falling edge corresponding to the first information are the same.

[0283] In some implementations, the first possible value corresponding to the maximum value includes even numbers, and the second possible value corresponding to the maximum value includes odd numbers.

[0284] Figure 28 is a schematic diagram of a communication device according to an embodiment of this application. The communication device 2800 shown in Figure 28 is a second device, and the communication device 2800 includes: a transmitting unit 2810.

[0285] The transmitting unit 2810 is used to transmit a first signal to a first device. The first signal carries first information and third information. The first information is used to indicate the time-domain start position of the transmission from the second device to the first device. The second information is used for time or frequency synchronization. The level of the first information is different from the level of the third information, and / or the transmission waveform of the first information is different from the transmission waveform of the third information.

[0286] In some implementations, the time-adjacent levels of the first and third information pieces satisfy one of the following: the level corresponding to the first information is high and the level corresponding to the third information is low; the level corresponding to the first information is low and the level corresponding to the third information is high; the level corresponding to the first information is negative and the level corresponding to the third information is high; or the level corresponding to the first information is positive and the level corresponding to the third information is low.

[0287] In some implementations, the TU length of the first information is a first length, and the difference between the first length and the chip length of the third information is greater than a third threshold.

[0288] In some implementations, the level of the first information is one of the following: negative level; positive level; high level; low level.

[0289] In some implementations, the TU of the first information contains multiple chips, and the difference between the chip length of one or more of the multiple chips and the chip length of the third information is greater than a fourth threshold.

[0290] In some implementations, two adjacent chips in the time domain have different voltage levels, and two chips separated by one chip in the time domain have the same voltage level.

[0291] Figure 29 is a schematic structural diagram of a communication device according to an embodiment of this application. The dashed lines in Figure 29 indicate that the unit or module is optional. This device 2900 can be used to implement the methods described in the above method embodiments. Device 2900 can be a chip, a terminal device, or a network device.

[0292] Apparatus 2900 may include one or more processors 2910. The processor 2910 may support apparatus 2900 in implementing the methods described in the preceding method embodiments. The processor 2910 may be a general-purpose processor or a special-purpose processor. For example, the processor may be a central processing unit (CPU). Alternatively, the processor may be other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor.

[0293] The apparatus 2900 may also include one or more memories 2920. The memories 2920 store a program that can be executed by the processor 2910, causing the processor 2910 to perform the methods described in the preceding method embodiments. The memories 2920 may be independent of the processor 2910 or integrated within the processor 2910.

[0294] The device 2900 may also include a transceiver 2930. The processor 2910 can communicate with other devices or chips via the transceiver 2930. For example, the processor 2910 can send and receive data with other devices or chips via the transceiver 2930.

[0295] This application also provides a computer-readable storage medium for storing a program. This computer-readable storage medium can be applied to a terminal or network device provided in this application, and the program causes a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0296] This application also provides a computer program product. The computer program product includes a program. The computer program product can be applied to a terminal or network device provided in this application embodiment, and the program causes a computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0297] This application also provides a computer program. This computer program can be applied to the terminal or network device provided in this application, and the computer program causes the computer to execute the methods performed by the terminal or network device in various embodiments of this application.

[0298] It should be understood that the terms "system" and "network" in this application can be used interchangeably. Furthermore, the terminology used in this application is only for explaining specific embodiments of the application and is not intended to limit the application. The terms "first," "second," "third," and "fourth," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish different objects, not to describe a specific order. In addition, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0299] In the embodiments of this application, the term "instruction" can be a direct instruction, an indirect instruction, or an indication of a relationship. For example, A instructing B can mean that A directly instructs B, such as B being able to obtain information through A; it can also mean that A indirectly instructs B, such as A instructing C, so B can obtain information through C; or it can mean that there is a relationship between A and B.

[0300] In the embodiments of this application, "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0301] In the embodiments of this application, the term "correspondence" can indicate a direct or indirect correspondence between two things, or an association between two things, or a relationship such as instruction and being instructed, configuration and being configured.

[0302] In this application embodiment, "predefined" or "preconfigured" can be implemented by pre-storing corresponding codes, tables, or other means that can be used to indicate relevant information in the device (e.g., including terminal devices and network devices). This application does not limit the specific implementation method. For example, predefined can refer to what is defined in the protocol.

[0303] In this application embodiment, the "protocol" may refer to a standard protocol in the field of communication, such as the LTE protocol, the NR protocol, and related protocols applied to future communication systems. This application does not limit this.

[0304] In the embodiments of this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0305] In the various embodiments of this application, the order of the above-mentioned processes does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0306] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0307] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0308] In addition, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0309] In the above embodiments, implementation can be achieved entirely or partially through software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented entirely or partially 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 a computer, all or part of the processes or functions described in the embodiments of this application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that a computer can read or a data storage device such as a server or data center that integrates one or more available media. The available media may be magnetic media (e.g., floppy disks, hard disks, magnetic tapes), optical media (e.g., digital video discs, DVDs) or semiconductor media (e.g., solid-state disks, SSDs), etc.

[0310] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

A method of wireless communication, comprising: The method comprises the following steps: A first device receives a first signal sent by a second device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of transmission of the second device to the first device, and the second information including data and / or control information; The time unit (TU) length of the first information is different from the chip length of the second information, and / or the transmission waveform of the first information is different from the transmission waveform of the second information. The method of claim 1, wherein The first information includes first part information and second part information, the transmission length of the first part information and the transmission length of the second part information being in a proportional relationship, and the level of the first part information being different from the level of the second part information. The method of claim 2, wherein The proportional relationship includes one of the following: The transmission length of the second part information is 1.5 times the transmission length of the first part information; The transmission length of the second part information is 2.5 times the transmission length of the first part information; The transmission length of the second part information is 3 times the transmission length of the first part information; The transmission length of the first part information is 1.5 times the transmission length of the second part information; The transmission length of the first part information is 2.5 times the transmission length of the second part information; The transmission length of the first part information is 3 times the transmission length of the second part information. The method as claimed in claim 2 or 3, characterized in that The first part information is earlier than the second part information in the time domain, the level of the first part information is a low level, and the level of the second part information is a high level. The method as claimed in claim 2 or 3, characterized in that The first part information is earlier than the second part information in the time domain, the level of the first part information is a high level, and the level of the second part information is a low level. The method of claim 1, wherein The level of the first information includes a plurality of levels, each level in the plurality of levels being different. The method of claim 6, wherein The value of the plurality of levels increases in the direction of increasing time; or the value of the plurality of levels decreases in the direction of increasing time. The method as claimed in claim 6 or 7, characterized in that A first level in the plurality of levels is not used for identification of the first information; and / or the first level is a reference level for identifying other levels, The time domain position corresponding to the first level is earlier than the time domain position corresponding to the other levels, and the other levels are levels other than the first level in the plurality of levels. The method of claim 1, wherein The TU length of the first information is a first length, and the difference between the first length and the chip length is greater than a first threshold. The method of claim 9, wherein The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. The method of claim 9 or 10, wherein The first signal includes third information for time or frequency synchronization, the first information is transmitted at a negative level, and the third information is transmitted at a high level; or The first information is transmitted at a positive level, and the third information is transmitted at a low level. The method according to any one of claims 9-11, characterized in that The minimum value of the number of chips of the second information that can be transmitted in one time domain unit is determined based on whether the cyclic prefix (CP) type corresponding to the first information and the rising edge or the falling edge corresponding to the first information are the same, and the CP type includes a normal CP and an extended CP. The method of claim 12, wherein The first value corresponding to the minimum value is an even number, and the second value corresponding to the minimum value is an odd number. The method of claim 1, wherein The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the second information is greater than a second threshold. The method of claim 14, wherein Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. The method according to any one of claims 1 to 15, characterized in that The transmission power of the first information is greater than the transmission power of the second information. The method according to any one of claims 1 to 16, characterized in that The TU length of the first information is determined based on a length of a time domain unit corresponding to a subcarrier spacing corresponding to the first information, a CP type, an inclusion relationship between the time domain unit corresponding to the subcarrier spacing corresponding to the first information and a CP, and a maximum number of chips of the second information transmitted in one time domain unit. The method of claim 17, wherein If the time domain unit corresponding to the subcarrier spacing does not contain the length of the CP, the TU length L of the first information TU By the formula L TU = L / M max where L represents the length of the time domain unit excluding the CP, and M max The maximum number of chips of the second information that can be transmitted in one time domain unit. The method of claim 17, wherein If the time domain unit corresponding to the subcarrier spacing contains a CP of length, the TU length L of the first information TU By formula L TU = L CP / M max , wherein L CP represents the length of a time domain unit containing a normal CP, and M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit. The method of claim 17, wherein The TU length corresponding to the first information when the first information is transmitted based on an extended CP is the same as the TU length corresponding to the first information when the first information is transmitted based on a normal CP. The method according to any one of claims 1 to 14, characterized in that The TU length of the first information is determined based on a time domain length of the normal CP and a time domain length of the extended CP. The method of claim 21, wherein The TU length of the first information is a value between (2048+144)k2 and (2048+512)k2 -μ ·T c / M max and (2048+512)k2 ―μ ·T c / M max , wherein M max represents a maximum value of the number of chips of the second information that can be transmitted within one time domain unit, T c =1 / (Δf max N f ), Δf max =480*10 3 Hz, N f =4096, and k=64, wherein μ represents a subcarrier spacing index. The method according to any one of claims 1 to 16, characterized in that TU length L of the first information TU By formula L TU = A k T c , wherein T c = 1 / (Δf max N f ), Δf max = 480 10 3 Hz, N f = 4096, k = 64, A takes one of 64, 68.5, 70. The method of any one of claims 17-23, wherein The maximum number of chips of the second information transmitted in one time domain unit is determined based on whether the CP type corresponding to the first information and the rising edge or the falling edge corresponding to the first information are the same. The method of claim 24, wherein The first value corresponding to the maximum value includes an even number, and the second value corresponding to the maximum value includes an odd number. A method of wireless communication, comprising: It includes: A first device receives a first signal transmitted by a second device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of transmission of the second device to the first device, and the third information being used for time or frequency synchronization. The level of the first information is different from the level of the third information, and / or the transmission waveform of the first information is different from the transmission waveform of the third information. The method of claim 26 wherein The levels corresponding to the first information and the third information adjacent in time domain satisfy one of the following: The level corresponding to the first information is a high level, and the level corresponding to the third information is a low level. The level corresponding to the first information is a low level, and the level corresponding to the third information is a high level. The level corresponding to the first information is a negative level, and the level corresponding to the third information is a high level. The level corresponding to the first information is a positive level, and the level corresponding to the third information is a low level. The method of claim 26 wherein The TU length of the first information is a first length, and a difference between the first length and a chip length of the third information is greater than a third threshold. The method of claim 28 wherein The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. The method of claim 26, wherein The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the third information is greater than a fourth threshold. The method of claim 30, wherein Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. A method of wireless communication, comprising: It includes: The second device sends a first signal to the first device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of a transmission from the second device to the first device, and the second information being used to carry data and / or control information. The transmission unit (TU) length of the first information is different from the chip length of the second information, and / or the waveform of the first information is different from the waveform of the second information. The method of claim 32, wherein The first information includes first part information and second part information, the transmission length of the first part information and the transmission length of the second part information being in a proportional relationship, and the level of the first part information being different from the level of the second part information. The method of claim 33, wherein The proportional relationship includes one of the following: The transmission length of the second part information is 1.5 times the transmission length of the first part information. The transmission length of the second part information is 2.5 times the transmission length of the first part information. The transmission length of the second part information is 3 times the transmission length of the first part information. The transmission length of the first part information is 1.5 times the transmission length of the second part information. The transmission length of the first part information is 2.5 times the transmission length of the second part information. The transmission length of the first part information is 3 times the transmission length of the second part information. The method of claim 33 or 34, wherein The first part information is earlier than the second part information in the time domain, the level of the first part information is a low level, and the level of the second part information is a high level. The method of claim 33 or 34, wherein The first part information is earlier than the second part information in the time domain, the level of the first part information is a high level, and the level of the second part information is a low level. The method of claim 32, wherein The level of the first information includes a plurality of levels, each level in the plurality of levels being different. The method of claim 37, wherein The values of the plurality of levels increase in the direction of increasing time; or the values of the plurality of levels decrease in the direction of increasing time. The method of claim 37 or 38, wherein A first level in the plurality of levels is not used for identification of the first information; and / or the first level is a reference level for identifying other levels, The time domain position corresponding to the first level is earlier than the time domain positions corresponding to the other levels, the other levels being levels in the plurality of levels other than the first level. The method of claim 32, wherein The TU length of the first information is a first length, and the difference between the first length and the chip length is greater than a first threshold. The method of claim 40, wherein The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. The method of claim 40 or 41, wherein The first signal includes third information for time or frequency synchronization, the first information being transmitted at a negative level, and the third information being transmitted at a high level; or The first information is transmitted at a positive level, and the third information is transmitted at a low level. The method of any one of claims 40-42, wherein The minimum value of the number of chips of the second information that can be transmitted within one time domain unit is determined based on whether the cyclic prefix (CP) type corresponding to the first information and the rising edge or the falling edge corresponding to the first information are the same, the CP type including a normal CP and an extended CP. The method of claim 43, wherein The first value corresponding to the minimum value is an even number, and the second value corresponding to the minimum value is an odd number. The method of claim 32, wherein The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the second information is greater than a second threshold. The method of claim 45, wherein Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. The method of any one of claims 32-46, wherein The transmission power of the first information is greater than the transmission power of the second information. The method of any one of claims 32-47, wherein The TU length of the first information is determined based on a length of a time domain unit corresponding to a subcarrier spacing of the first information, a CP type, an inclusion relationship between the time domain unit corresponding to the subcarrier spacing of the first information and the CP, and a maximum number of chips of the second information transmitted in one time domain unit. The method of claim 48, wherein If the time domain unit corresponding to the subcarrier spacing does not contain the length of the CP, the TU length L of the first information TU By the formula L TU = L / M max , wherein L represents the length of the time domain unit excluding the CP, and M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit. The method of claim 48, wherein If the time domain unit corresponding to the subcarrier spacing contains a CP of length, the TU length L of the first information TU By formula L TU = L CP / M max , wherein L CP represents the length of a time domain unit containing a normal CP, and M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit. The method of claim 48, wherein The TU length of the first information based on extended CP transmission is the same as the TU length of the first information based on normal CP transmission. The method of any one of claims 32-45, wherein The TU length of the first information is determined based on a time domain length of the normal CP and a time domain length of the extended CP. The method of claim 52 wherein The TU length of the first information is (2048+144)k2 ―μ ·T c / M max and (2048+512)k2 ―μ ·T c / M max , wherein M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit, T c =1 / (Δf max ·N f ), Δf max =480*10 3 Hz, N f =4096, and k=64, and μ represents a subcarrier spacing index. The method of any one of claims 32-47, wherein TU length L of the first information TU By formula L TU = A k T c , wherein T c = 1 / (Δf max N f ), Δf max = 480 10 3 Hz, N f = 4096, k = 64, A takes one of 64, 68.5, 70. The method of any one of claims 48-54, wherein The maximum number of chips of the second information transmitted in one time domain unit is determined based on whether the CP type corresponding to the first information and a rising edge or a falling edge corresponding to the first information are the same. The method of claim 55, wherein The first value corresponding to the maximum value includes an even number, and the second value corresponding to the maximum value includes an odd number. A method of wireless communication, comprising: The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the second information is greater than a second threshold. Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. The communication device is a first device, comprising: The method of claim 57, wherein The second device transmits a first signal to the first device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of transmission of the second device to the first device, and the second information being used for time or frequency synchronization. The level of the first information is different from the level of the third information, and / or the transmission waveform of the first information is different from the transmission waveform of the third information. The levels corresponding to the first information and the third information adjacent in time domain satisfy one of the following: The level corresponding to the first information is a high level, and the level corresponding to the third information is a low level. The level corresponding to the first information is a low level, and the level corresponding to the third information is a high level. The method of claim 57, wherein The level corresponding to the first information is a negative level, and the level corresponding to the third information is a high level. The method of claim 59, wherein The level corresponding to the first information is a positive level, and the level corresponding to the third information is a low level. The method of claim 57, wherein The TU length of the first information is a first length, and a difference between the first length and a chip length of the third information is greater than a third threshold. The method of claim 61, wherein The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. A communication device characterized by comprising: The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the second information is greater than a second threshold. Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. The communication device is a first device, comprising: The receiving unit is configured to receive a first signal transmitted by a second device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of a transmission from the second device to the first device, and the second information including data and / or control information. The time unit (TU) length of the first information is different from the chip length of the second information, and / or the transmission waveform of the first information is different from the transmission waveform of the second information. The communication device of claim 63, wherein The first information includes first part information and second part information, the transmission length of the first part information and the transmission length of the second part information are in a proportional relationship, and the level of the first part information is different from the level of the second part information. The communication device of claim 64, wherein The proportional relationship includes one of the following: The transmission length of the second part information is 1.5 times the transmission length of the first part information. The transmission length of the second part information is 2.5 times the transmission length of the first part information. The transmission length of the second part information is 3 times the transmission length of the first part information. The transmission length of the first part information is 1.5 times the transmission length of the second part information. The transmission length of the first part information is 2.5 times the transmission length of the second part information. The transmission length of the first part information is 3 times the transmission length of the second part information. The communication device of claim 64 or 65, wherein The first part information is earlier than the second part information in the time domain, the level of the first part information is a low level, and the level of the second part information is a high level. The communication device of claim 64 or 65, wherein The first part information is earlier than the second part information in the time domain, the level of the first part information is a high level, and the level of the second part information is a low level. The communication device of claim 63, wherein The level of the first information includes a plurality of levels, and each level in the plurality of levels is different. The communication device of claim 68, wherein The value of the plurality of levels increases in the direction of increasing time, or the value of the plurality of levels decreases in the direction of increasing time. The communication device of claim 68 or 69, wherein A first level in the plurality of levels is not used for identification of the first information, and / or the first level is a reference level for identifying other levels. The time domain position corresponding to the first level is earlier than the time domain position corresponding to the other levels, and the other levels are levels other than the first level in the plurality of levels. The communication device of claim 63, wherein The TU length of the first information is a first length, and the difference between the first length and the chip length is greater than a first threshold. The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. The communication device of claim 71, wherein The first signal includes third information for time or frequency synchronization, the first information is transmitted at a negative level, and the third information is transmitted at a high level; or The communication device of claim 71 or 72, wherein The first information is transmitted at a positive level, and the third information is transmitted at a low level. The minimum value of the number of chips of the second information that can be transmitted in one time domain unit is determined based on whether the cyclic prefix (CP) type corresponding to the first information and the rising edge or the falling edge corresponding to the first information are the same, and the CP type includes a normal CP and an extended CP. The communication device of any of claims 71-73, wherein The first value corresponding to the minimum value is an even number, and the second value corresponding to the minimum value is an odd number. The communication device of claim 74, wherein ​ The communication device of claim 63, wherein The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the second information is greater than a second threshold. The communication device of claim 76, wherein Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. The communication device of any of claims 63-77, wherein The transmission power of the first information is greater than the transmission power of the second information. The communication device of any of claims 63-78, wherein The TU length of the first information is determined based on a length of a time domain unit corresponding to a subcarrier spacing corresponding to the first information, a CP type, an inclusion relationship between the time domain unit corresponding to the subcarrier spacing corresponding to the first information and the CP, and a maximum number of chips in one time domain unit in which the second information is transmitted. The communication device of claim 79, wherein If the time domain unit corresponding to the subcarrier spacing does not contain the length of the CP, the TU length L of the first information TU By the formula L TU = L / M max , wherein L represents the length of the time domain unit excluding the CP, and M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit. The communication device of claim 79, wherein If the time domain unit corresponding to the subcarrier spacing contains a CP of length, the TU length L of the first information TU By formula L TU = L CP / M max , wherein L CP represents the length of a time domain unit containing a normal CP, and M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit. The communication device of claim 79, wherein The TU length corresponding to the first information based on extended CP transmission is the same as the TU length corresponding to the first information based on normal CP transmission. The communication device of any of claims 63-76, wherein The TU length of the first information is determined based on a time domain length of the normal CP and a time domain length of the extended CP. The communication device of claim 83, wherein The TU length of the first information is (2048+144)k2 ―μ ·T c / M max and (2048+512)k2 ―μ ·T c / M max , wherein M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit, T c =1 / (Δf max N f ), Δf max =480*10 3 Hz, N f =4096, k=64, and μ represents a subcarrier spacing index. The communication device of any of claims 63-78, wherein TU length L of the first information TU By formula L TU = A k T c , wherein T c = 1 / (Δf max N f ), Δf max = 480 10 3 Hz, N f = 4096, k = 64, A takes one of 64, 68.5, 70. The communication device of any of claims 79-85, wherein The maximum number of chips in one time domain unit in which the second information is transmitted is determined based on whether the CP type corresponding to the first information and a rising edge or a falling edge corresponding to the first information are the same. The communication device of claim 86, wherein A first value corresponding to the maximum value includes an even number, and a second value corresponding to the maximum value includes an odd number. A communication device characterized by comprising: The communication device is a first device, and includes: A receiving unit, configured to receive a first signal transmitted by a second device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of transmission of the second device to the first device, and the third information being used for time or frequency synchronization. The level of the first information is different from the level of the third information, and / or the transmission waveform of the first information is different from the transmission waveform of the third information. The communication device of claim 88, wherein The levels corresponding to the first information and the third information adjacent in time domain satisfy one of the following: The level corresponding to the first information is a high level, and the level corresponding to the third information is a low level. The level corresponding to the first information is a low level, and the level corresponding to the third information is a high level. The level corresponding to the first information is a negative level, and the level corresponding to the third information is a high level. The level corresponding to the first information is a positive level, and the level corresponding to the third information is a low level. The communication device of claim 88, wherein The TU length of the first information is a first length, and a difference between the first length and a chip length of the third information is greater than a third threshold. The communication device of claim 90, wherein The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. The communication device of claim 88, wherein The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the third information is greater than a fourth threshold. The communication device of claim 92, wherein Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. A communication device characterized by comprising: The communication device is a second device, and includes: The sending unit is configured to send a first signal to the first device, the first signal carrying first information and second information, the first information being used to indicate a time domain starting position of transmission of the second device to the first device, and the second information being used to carry data and / or control information. The transmission unit (TU) length of the first information is different from the chip length of the second information, and / or the waveform of the first information is different from the waveform of the second information. The communication device of claim 94, wherein The first information includes first part information and second part information, the transmission length of the first part information and the transmission length of the second part information are in a proportional relationship, and the level of the first part information is different from the level of the second part information. The communication device of claim 95, wherein The proportional relationship includes one of the following: The transmission length of the second part information is 1.5 times the transmission length of the first part information. The transmission length of the second part information is 2.5 times the transmission length of the first part information. The transmission length of the second part information is 3 times the transmission length of the first part information. The transmission length of the first part information is 1.5 times the transmission length of the second part information. The transmission length of the first part information is 2.5 times the transmission length of the second part information. The transmission length of the first part information is 3 times the transmission length of the second part information. The communication device of claim 95 or 96, wherein The first part information is earlier than the second part information in the time domain, the level of the first part information is a low level, and the level of the second part information is a high level. The communication device of claim 95 or 96, wherein The first part information is earlier than the second part information in the time domain, the level of the first part information is a high level, and the level of the second part information is a low level. The communication device of claim 94, wherein The level of the first information includes a plurality of levels, each level in the plurality of levels is different. The communication device of claim 99, wherein The value of the plurality of levels increases in the direction of time increase; or the value of the plurality of levels decreases in the direction of time increase. The communication device of claim 99 or 100, wherein A first level in the plurality of levels is not used for identification of the first information; and / or the first level is a reference level for identifying other levels, The time domain position corresponding to the first level is earlier than the time domain position corresponding to the other levels, and the other levels are levels in the plurality of levels except the first level. The communication device of claim 94, wherein The TU length of the first information is a first length, and the difference between the first length and the chip length is greater than a first threshold. The communication device of claim 102, wherein The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. The communication device of claim 102 or 103, wherein The first signal includes third information for time or frequency synchronization, the first information is transmitted at a negative level, and the third information is transmitted at a high level; or The first information is transmitted at a positive level, and the third information is transmitted at a low level. The communication device of any of claims 102-104, wherein The minimum value of the number of chips of the second information that can be transmitted within one time domain unit is determined based on whether the cyclic prefix (CP) type corresponding to the first information and the rising edge or the falling edge corresponding to the first information are the same, and the CP type includes a normal CP and an extended CP. The communication device of claim 105, wherein The first value corresponding to the minimum value is an even number, and the second value corresponding to the minimum value is an odd number. The communication device of claim 106, wherein The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the second information is greater than a second threshold. The communication device of claim 107, wherein Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. The communication device of any of claims 94-108, wherein The transmission power of the first information is greater than the transmission power of the second information. The communication device of any of claims 94-109, wherein The TU length of the first information is determined based on a length of a time domain unit corresponding to a subcarrier spacing of the first information, a CP type, an inclusion relationship between the time domain unit corresponding to the subcarrier spacing of the first information and the CP, and a maximum number of chips of the second information transmitted in one time domain unit. The communication device of claim 110, wherein If the time domain unit corresponding to the subcarrier spacing does not contain the length of the CP, the TU length L of the first information TU By the formula L TU = L / M max , wherein L represents the length of the time domain unit excluding the CP, and M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit. The communication device of claim 110, wherein If the time domain unit corresponding to the subcarrier spacing contains a CP of length, the TU length L of the first information TU By formula L TU = L CP / M max , wherein L CP represents the length of a time domain unit containing a normal CP, and M max represents the maximum value of the number of chips of the second information that can be transmitted within one time domain unit. The communication device of claim 110, wherein The TU length of the first information based on extended CP transmission is the same as the TU length of the first information based on normal CP transmission. The communication device of any of claims 94-107, wherein The TU length of the first information is determined based on a time domain length of the normal CP and a time domain length of the extended CP. The communication device of claim 114, wherein The TU length of the first information is a value between (2048+144)k2 and (2048+512)k2 ―μ ·T c / M max and (2048+512)k2 ―μ ·T c / M max , wherein M max represents a maximum value of the number of chips of the second information that can be transmitted within one time domain unit, T c =1 / (Δf max N f ), Δf max =480*10 3 Hz, N f =4096, k=64, and μ represents a subcarrier spacing index. The communication device of any of claims 94-109, wherein TU length L of the first information TU By formula L TU =A·k·T c , wherein T c =1 / (Δf max ·N f ), Δf max =480·10 3 Hz, N f =4096, k=64, A takes one of 64, 68.5, 70. The communication device of any of claims 110-116, wherein The maximum number of chips of the second information transmitted in one time domain unit is determined based on whether the CP type corresponding to the first information and a rising edge or a falling edge corresponding to the first information are the same. The communication device of claim 117, wherein The first value corresponding to the maximum value includes an even number, and the second value corresponding to the maximum value includes an odd number. A communication device characterized by comprising: The communication device is a second device, comprising: a sending unit configured to send a first signal to a first device, the first signal carrying first information and third information, the first information being used to indicate a time domain starting position of transmission of the second device to the first device, and the second information being used for time or frequency synchronization; wherein a level of the first information is different from a level of the third information, and / or a transmission waveform of the first information is different from a transmission waveform of the third information. The communication device of claim 119, wherein The levels corresponding to the first information and the third information adjacent in time domain satisfy one of the following: The level corresponding to the first information is a high level, and the level corresponding to the third information is a low level. The level corresponding to the first information is a low level, and the level corresponding to the third information is a high level. The level corresponding to the first information is a negative level, and the level corresponding to the third information is a high level. The level corresponding to the first information is a positive level, and the level corresponding to the third information is a low level. The communication device of claim 119, wherein The TU length of the first information is a first length, and a difference between the first length and a chip length of the third information is greater than a third threshold. The communication device of claim 121, wherein The level of the first information is one of the following: a negative level; a positive level; a high level; and a low level. The communication device of claim 119, wherein The first information includes a plurality of chips in a TU, and a difference between a chip length of one or more chips in the plurality of chips and a chip length of the third information is greater than a fourth threshold. The communication device of claim 123, wherein Two chips adjacent in time domain in the plurality of chips correspond to different levels, and two chips spaced by one chip in time domain in the plurality of chips correspond to the same level. A communication device characterized by comprising: A communication device comprising a transceiver, a memory for storing a program, and a processor for invoking the program in the memory and controlling the transceiver to receive or send signals, so as to make the communication device perform the method according to any one of claims 1-62. An apparatus, characterized in that A device comprising a processor for invoking a program from a memory, so as to make the device perform the method according to any one of claims 1-62. A chip characterized by A device comprising a processor for invoking a program from a memory, so that the device performs the method according to any one of claims 1-62. A computer-readable storage medium, characterized by, A computer program product having stored thereon a program which causes a computer to perform the method according to any one of claims 1-62. A computer program product, characterized in that A computer program product having stored thereon a program which causes a computer to perform the method according to any one of claims 1-62. A computer program, characterized in that The computer program product causes a computer to perform the method according to any one of claims 1-62.

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