Preamble-based transmission method and apparatus, and terminal and network-side device

Abstract

The present application belongs to the technical field of communications. Disclosed are a preamble-based transmission method and apparatus, and a terminal and a network-side device. The preamble-based transmission method in the embodiments of the present application comprises: a transmitting end generating a preamble; and the transmitting end transmitting first information, wherein the first information comprises the preamble, the preamble comprises a start indicator part and a clock collection part, the start indicator part is used for indicating the start of reader-to-device (R2D) transmission, and the clock collection part is used for transmission synchronization.

Description

Preamble-based transmission method and device, terminal and network-side equipment

[0001] Cross-reference to Related Applications

[0002] This application claims priority to Chinese Patent Application No. 202411386904.2, filed on September 30, 2024, the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0003] The present application belongs to the field of communication technology, and specifically relates to a preamble-based transmission method, device, terminal and network-side equipment. BACKGROUND

[0004] With the development of communication technology, in an ambient power-enabled Internet of Things (AIoT) communication scenario, AIoT devices are characterized according to their energy storage capacity and ability to transmit radio frequency signals. In reader-to-device (R2D) transmission, when the reader is a terminal, the transmission reliability between the reader and the AIoT device is poor due to the inability to perform time synchronization between the reader and the AIoT device. SUMMARY

[0005] Embodiments of the present application provide a preamble-based transmission method, device, terminal and network-side equipment, which can solve the problem of poor transmission reliability between the reader and the AIoT device.

[0006] In a first aspect, a preamble-based transmission method is provided, comprising:

[0007] generating a preamble at a sending end;

[0008] sending first information at the sending end, the first information comprising the preamble;

[0009] wherein the preamble comprises a start indicator part and a clock acquisition part, the start indicator part being used to indicate the start of a reader-to-device (R2D) transmission, and the clock acquisition part being used for transmission synchronization.

[0010] In a second aspect, a preamble-based transmission method is provided, comprising:

[0011] receiving first information at a receiving end from a sending end, the first information comprising the preamble;

[0012] The preamble comprises a start indicator part and a clock acquisition part, the start indicator part is used for indicating a start of a reader-to-device (R2D) transmission, and the clock acquisition part is used for transmission synchronization.

[0013] In a third aspect, a preamble-based transmission apparatus is provided, comprising:

[0014] a processing module configured to generate a preamble;

[0015] a sending module configured to send first information, the first information comprising the preamble;

[0016] The preamble comprises a start indicator part and a clock acquisition part, the start indicator part is used for indicating a start of a reader-to-device (R2D) transmission, and the clock acquisition part is used for transmission synchronization.

[0017] In a fourth aspect, a preamble-based transmission apparatus is provided, comprising:

[0018] a receiving module configured to receive first information from a sending terminal, the first information comprising the preamble;

[0019] The preamble comprises a start indicator part and a clock acquisition part, the start indicator part is used for indicating a start of a reader-to-device (R2D) transmission, and the clock acquisition part is used for transmission synchronization.

[0020] In a fifth aspect, a preamble-based transmission apparatus is provided, the apparatus is configured to perform the steps of the method according to the first aspect, or implement the steps of the method according to the second aspect.

[0021] In a sixth aspect, a terminal is provided, comprising a processor and a memory, the memory stores programs or instructions executable on the processor, and the programs or instructions are executed by the processor to implement the steps of the method according to the first aspect.

[0022] In a seventh aspect, a terminal is provided, comprising a processor and a communication interface, wherein,

[0023] When the terminal is a sending terminal, the processor is configured to generate a preamble, and the communication interface is configured to send first information, the first information comprising the preamble; the preamble comprises a start indicator part and a clock acquisition part, the start indicator part is used for indicating a start of a reader-to-device (R2D) transmission, and the clock acquisition part is used for transmission synchronization.

[0024] When the terminal is a receiving terminal, the communication interface is configured to receive first information from a sending terminal, the first information comprising the preamble;

[0025] The preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate that the reader to device R2D transmission is started, and the clock acquisition part is used to transmit synchronization.

[0026] In an eighth aspect, a network-side device is provided, which includes a processor and a memory, the memory stores programs or instructions executable on the processor, and the programs or instructions are executed by the processor to implement the steps of the method according to the first aspect.

[0027] In a ninth aspect, a network-side device is provided, which includes a processor and a communication interface, the processor is configured to generate a preamble, and the communication interface is configured to send first information including the preamble, the preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate that the reader to device R2D transmission is started, and the clock acquisition part is used to transmit synchronization.

[0028] In a tenth aspect, a readable storage medium is provided, which stores programs or instructions, the programs or instructions are executed by a processor to implement the steps of the method according to the first aspect or the steps of the method according to the second aspect.

[0029] In an eleventh aspect, a wireless communication system is provided, which includes a sending-end device and a receiving-end device, the sending-end device is configured to implement the steps of the method according to the first aspect, and the receiving-end device is configured to implement the steps of the method according to the second aspect.

[0030] In a twelfth aspect, a chip is provided, which includes a processor and a communication interface, the communication interface is coupled to the processor, the processor is configured to run programs or instructions to implement the method according to the first aspect or the method according to the second aspect.

[0031] In a thirteenth aspect, a computer program / program product is provided, which is stored in a storage medium, and the computer program / program product is executed by at least one processor to implement the steps of the method according to the first aspect or the steps of the method according to the second aspect.

[0032] In the embodiments of the present application, the sending-end device generates a preamble, and the sending-end device sends first information including the preamble, the preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate that the reader to device R2D transmission is started, and the clock acquisition part is used to transmit synchronization. In this way, since the reader to device R2D transmission is started and transmission synchronization is performed through the preamble, the transmission reliability between the reader and the AIoT device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] FIG. 1 is a block diagram of a wireless communication system to which embodiments of the present application can be applied;

[0034] FIG. 2 is a flow diagram of a preamble-based transmission method according to an embodiment of the present application;

[0035] FIGS. 3A to 3E are diagrams of transmission scenarios in a preamble-based transmission method according to an embodiment of the present application;

[0036] FIGS. 4A to 4B are diagrams of transmission scenarios in a preamble-based transmission method according to an embodiment of the present application;

[0037] FIG. 5 is a diagram of a transmission scenario in a preamble-based transmission method according to an embodiment of the present application;

[0038] FIGS. 6A to 6B are diagrams of transmission scenarios in a preamble-based transmission method according to an embodiment of the present application;

[0039] FIGS. 7A to 7N are diagrams of transmission scenarios in a preamble-based transmission method according to an embodiment of the present application;

[0040] FIG. 8 is a flow diagram of another preamble-based transmission method according to an embodiment of the present application;

[0041] FIG. 9 is a block diagram of a preamble-based transmission apparatus according to an embodiment of the present application;

[0042] FIG. 10 is a block diagram of another preamble-based transmission apparatus according to an embodiment of the present application;

[0043] FIG. 11 is a block diagram of a communication device according to an embodiment of the present application;

[0044] FIG. 12 is a block diagram of a terminal according to an embodiment of the present application;

[0045] FIG. 13 is a block diagram of a network-side device according to an embodiment of the present application. DETAILED DESCRIPTION

[0046] The terms "first," "second," etc., used in this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first" and "second" are generally of the same class, not limited in number; for example, the first object can be one or more. Furthermore, "or" in this application indicates at least one of the connected objects. For example, the scope of protection for "A or B" covers at least three scenarios: Scenario 1: including A but not B; Scenario 2: including B but not A; Scenario 3: including both A and B. In addition, the terms "A and / or B," "at least one of A and B," and "at least one of A or B" also cover at least the above three scenarios. The character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0047] The term "instruction" in this application can be either a direct instruction (or explicit instruction) or an indirect instruction (or implicit instruction). A direct instruction can be understood as one in which the sender explicitly informs the receiver of specific information, the operation to be performed, or the requested result, etc., in the instruction sent. An indirect instruction can be understood as one in which the receiver determines the corresponding information based on the instruction sent by the sender, or makes a judgment and determines the operation to be performed or the requested result, etc., based on the judgment result.

[0048] It is worth noting that the technology described in the embodiments of the present application is not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA) or other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used in the above-mentioned systems and radio technologies, as well as in other systems and radio technologies. The following description describes a New Radio (NR) system for example purposes, and NR terminology is used in most of the following description, but these technologies can also be applied to systems other than NR systems, such as 6th Generation (6G) communication systems. th

[0049] ​FIG. 1 shows a block diagram of a wireless communication system to which embodiments of the present application can be applied. The wireless communication system includes a terminal 11 and a network-side device 12. The terminal 11 can be a terminal-side device such as a mobile phone, a Tablet Personal Computer, a Laptop Computer, a notebook computer, a Personal Digital Assistant (PDA), a palmtop computer, a netbook, an Ultra-mobile Personal Computer (UMPC), a Mobile Internet Device (MID), an Augmented Reality (AR) device, a Virtual Reality (VR) device, a robot, a wearable device, a flight vehicle, a Vehicle User Equipment (VUE), a shipboard device, a Pedestrian User Equipment (PUE), a smart home (a home device with a wireless communication function such as a refrigerator, a television, a washing machine, or furniture), a game console, a Personal Computer (PC), a kiosk, or a self-service machine. The wearable device includes a smart watch, a smart bracelet, a smart earphone, smart glasses, smart jewelry (a smart bracelet, a smart necklace, a smart ring, a smart necklace, a smart anklet, a smart necklace, etc.), a smart wristband, smart clothes, etc. The vehicle-mounted device can also be referred to as a vehicle-mounted terminal, a vehicle-mounted controller, a vehicle-mounted module, a vehicle-mounted component, a vehicle-mounted chip, or a vehicle-mounted unit, etc. It should be noted that the specific type of the terminal 11 is not limited in the embodiments of the present application. The network-side device 12 can include an access network device or a core network device. The access network device can also be referred to as a Radio Access Network (RAN) device, a radio access network function, or a radio access network unit. The access network device can include a base station, a Wireless Local Area Network (WLAN) Access Point (AP), or a Wireless Fidelity (WiFi) node, etc.The base station can be referred to as a Node B (NB), an evolved Node B (eNB), a next generation Node B (gNB), a New Radio Node B (NR Node B), an access point, a relay station (RBS), a serving base station (SBS), a base transceiver station (BTS), a radio base station, a radio transceiver, a basic service set (BSS), an extended service set (ESS), a home Node B (HNB), a home evolved Node B, a transmit / receive point (TRP), or some other suitable terminology in the art, so long as 5 30 the base station is capable of achieving the same technical effect, and the base station is not limited to a specific technical term. It should be noted that in the embodiments of the present application, only the base station in the NR system is taken as an example for introduction, and the specific type of the base station is not limited.

[0050] For the convenience of understanding, some contents related to the embodiments of the present application are described as follows:

[0051] I. Ambient IoT (AIoT).

[0052] Ambient IoT is a kind of IoT business. Among them, the AIoT device is powered by energy harvesting, and the AIoT device has no battery or has limited energy storage capability (for example, using a capacitor). The overall power consumption of such devices is low, including low-power signal reception and low-power signal transmission. Due to the low overall power consumption, the energy for communication can come from the environment, such as wind energy, kinetic energy, thermal energy, radio frequency (RF) signals, etc., which can also be called Ambient IoT devices or passive IoT devices or responder devices.

[0053] Ambient IoT devices can be classified based on energy sources, energy storage capabilities, passive or active transmission, etc., including various device types:

[0054] Passive Device, such as device 1. No energy storage, no independent signal generation / amplification capability, communicate through backscattering.

[0055] Semi-passive Device, such as device 2a, also belongs to the big category of Passive Device. Has energy storage, no independent signal generation, i.e. communicate through backscattering. The stored energy can be used for amplification of the reflected signal.

[0056] Active Device, such as device 2b, has energy storage, has independent signal generation capability, i.e. contains active radio frequency components for transmission.

[0057] Different energy storage capability of devices also affects the transmission quality of the devices. Generally, devices with higher energy storage also mean higher receiving sensitivity or higher sending power, i.e. the reliability of the receiving or sending link can be better guaranteed.

[0058] II. AIOT service types.

[0059] The main service types are: inventory, command.

[0060] Inventory is the most basic and important service of AIoT, which is used to enable the AIoT server to learn about one or more known or unknown AIoT devices within the coverage of the reader through the 3rd Generation Partnership Project (3GPP) network.

[0061] After learning that the AIoT device is recognized by the network, the AIoT server can issue a command to the device through the 3GPP network.

[0062] Specifically, it includes:

[0063] Read: read information from a certain location in the storage of the AIoT device;

[0064] Write: write information to the storage of the AIoT device;

[0065] Kill: will no longer respond to any reader, the AIoT device can no longer be used.

[0066] The data transmission model of AIoT includes:

[0067] Device-originated (DO): DO devices typically send various data, requests or instructions, i.e. originated by the device itself;

[0068] Device-terminated (DT), DT devices typically receive instructions, data or requests from other devices or systems, i.e. terminated to the device;

[0069] Where DO data means that the data flow originates from an AIoT device (like a Radio Frequency Identification (RFID) tag). DT data means that the data flow is transmitted to an AIoT device.

[0070] For data flow originating from an AIoT device, i.e. DO data, it can be further classified as:

[0071] 1) DO autonomous (DO-A), i.e. the AIoT device autonomously initiates data transmission.

[0072] For example, connecting a large number of various sensors that collect and actively report information about the environment, devices and living beings when necessary.

[0073] 2) DO device-terminated triggered (DO-DTT), i.e. a reader device such as a base station triggers the AIoT device to initiate data transmission.

[0074] For example, asset identification, status reporting and tracking, which are DL triggered reporting, the reader collects data from the tag by triggering the inventory program. Since the AIoT device generates data and initiates data transmission, this service should be considered as a DO service initiated by the AIoT device triggered by a control command from the reader side.

[0075] Three, connection topology.

[0076] There are the following potential deployment scenarios:

[0077] Topology one, as shown in FIG. 2: Base Station (BS) Ambient IoT device (AIoT device).

[0078] AIoT BS and small base station co-site coexist. The BS sends R2D messages to the AIoT device, and the AIoT device backscatters, i.e. transmits D2R messages to the BS.

[0079] Topology two, as shown in FIG. 3: BS intermediate node Ambient IoT device.

[0080] AIoT BS and large base station co-site coexistence, indoor terminal (Equipment, UE) as an intermediate node. BS controls UE through air interface signaling, UE sends R2D message to AIoT device, AIoT device backscatters, that is, D2R message transmission to UE, and the response of AIoT device is transferred to BS by UE through air interface.

[0081] Due to self-interference and other problems, the base station BS, terminal UE, assisting node or intermediate node can be multiple base stations BS or UEs, respectively. For example, multiple Readers undertake the functions of receiving or transmitting, thereby supporting transceiver separation.

[0082] The preamble-based transmission method provided by the embodiments of the present application will be described in detail in combination with the accompanying drawings, some embodiments and application scenarios.

[0083] Referring to FIG. 2, the present application provides a preamble-based transmission method, as shown in FIG. 2, which includes:

[0084] Step 201, the sending end generates a preamble;

[0085] Step 202, the sending end sends first information, and the first information includes the preamble;

[0086] The preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate the start of reader-to-device R2D transmission, and the clock acquisition part is used for transmission synchronization.

[0087] In the embodiments of the present application, before physical channel transmission, the sending end can generate a preamble (Preamble) and send first information to assist the sending end and the receiving end to achieve synchronization and ensure the reliability of subsequent physical channel transmission.

[0088] Optionally, the above-mentioned sending end can be understood as a reader (such as UE reader or base station reader, etc.), and the above-mentioned receiving end can be understood as an AIoT device.

[0089] Optionally, the above-mentioned start indicator part can include any of the following:

[0090] On / Off mode, i.e. high / low level transmission;

[0091] Off mode, i.e. low level transmission.

[0092] The receiving end can determine the start point of the R2D transmission based on the start indicator part. In this way, the start point of the R2D transmission is provided by carrying the start indicator part in the preamble, thereby saving detection overhead.

[0093] Optionally, the clock acquisition part can be used to determine the duration of an On-Off Keying (OOK) chip, providing chip synchronization of at least subsequent channel transmission. The chip includes an on chip and an off chip, and the duration of the chip can be understood as the length of time that a chip occupies time domain resources, and can also be referred to as the length of the chip.

[0094] The embodiment of the application generates a preamble by a sending end; the sending end sends first information, and the first information includes the preamble; wherein the preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate the start of reader-to-device (R2D) transmission, and the clock acquisition part is used for transmission synchronization. In this way, since the start of the reader-to-device (R2D) transmission and transmission synchronization are determined by the preamble, the transmission reliability between the reader and the AIoT device is improved.

[0095] Optionally, in some embodiments, the first information satisfies at least one of the following:

[0096] The start position of the start indicator part is aligned with the boundary of an Orthogonal Frequency Division Multiplexing (OFDM) symbol or the boundary of a Cyclic Prefix (CP);

[0097] The end position of the start indicator part is aligned with the boundary of the OFDM symbol;

[0098] The start position of the clock acquisition part is aligned with the boundary of the OFDM symbol;

[0099] The end position of the clock acquisition part is aligned with the boundary of the OFDM symbol.

[0100] In the embodiment of the application, the relationship between the start indicator part and the OFDM symbol or the Cyclic Prefix (CP), and the relationship between the clock acquisition part and the OFDM symbol are defined, which facilitates protocol implementation and simplifies the difficulty of signal detection.

[0101] For example, in some embodiments, the starting position of the start indicator part is aligned with the boundary of an OFDM symbol or the boundary of a cyclic prefix (CP), and the ending position of the clock acquisition part is aligned with the boundary of an OFDM symbol.

[0102] For example, in some embodiments, the starting position of the start indicator part is aligned with the boundary of an OFDM symbol or the boundary of a cyclic prefix (CP), and the starting position of the clock acquisition part is aligned with the boundary of an OFDM symbol.

[0103] For example, in some embodiments, the ending position of the clock acquisition part is aligned with the boundary of an OFDM symbol, and the starting position of the start indicator part can not be aligned with the boundary of an OFDM symbol.

[0104] Optionally, the duration of each chip of the start indicator part can be set according to actual needs.

[0105] For example, in some embodiments, the total duration of off chips of the start indicator part is fixed, and the total duration of on chips of the start indicator part is variable; or the total duration of off chips in the start indicator part is fixed.

[0106] In the embodiments of the present application, the total duration of off chips in the start indicator part can be fixed in the case that the ending position of the clock acquisition part is aligned with the boundary of an OFDM symbol, and the starting position of the start indicator part is not aligned with the boundary of an OFDM symbol or a CP. The total duration of off chips of the start indicator part can be fixed in the case that the ending position of the clock acquisition part is aligned with the boundary of an OFDM symbol, and the starting position of the start indicator part is aligned with the boundary of an OFDM symbol or a CP, and the total duration of on chips of the start indicator part is variable.

[0107] Optionally, in some embodiments, the duration of one off chip in the start indicator part is determined based on at least one of the following:

[0108] the duration of an OFDM symbol;

[0109] the duration of a CP;

[0110] a first time, the first time being the duration of the clock acquisition part;

[0111] a second time, the second time being the duration of one or more chips or off chips in a CP.

[0112] For the first time, the duration of the clock acquisition part is different for different M, and the first time can be understood as the duration of the smallest clock acquisition part. M can be understood as a modulation parameter, or the modulation parameter of OOK, that is, the number of OOK chips included in one OFDM modulation symbol.

[0113] For the second time, the duration of the chip or off chip is different for different M, and the second time can be understood as the smallest chip or off chip. The second time can be understood or replaced as the duration of the chip or off chip in the CP part.

[0114] Optionally, the duration of one on chip in the start indicator part is determined based on at least one of the following:

[0115] The duration of the OFDM symbol;

[0116] The duration of the CP;

[0117] The duration of the off chip;

[0118] The duration of the off chip in the OFDM symbol where the on chip is located;

[0119] The duration of the preamble;

[0120] The first time, the first time is the duration of the clock acquisition part;

[0121] The total duration of the off chip in the start indicator part.

[0122] In the embodiments of the present application, the duration of the on chip and the off chip in the start indicator part is defined, so that the protocol is facilitated and the detection difficulty is reduced.

[0123] For example, in some embodiments, the start indicator part satisfies any of the following:

[0124] The duration of the last chip in the start indicator part is variable, and the duration of the target chip in the start indicator part except the last chip is fixed;

[0125] The duration of each chip in the start indicator part is fixed.

[0126] In the embodiments of the present application, the start indicator part further satisfies at least one of the following:

[0127] The duration of the first chip is not equal to the candidate chip duration of the channel PRDCH for the reader-to-device transmission;

[0128] The duration of the second chip is not equal to the candidate chip duration of the PRDCH;

[0129] The duration of the second chip is equal to the first value minus the duration of the first chip, and the first value is the sum of the duration of the OFDM symbol and the duration of the CP;

[0130] The duration of the second chip is an integer multiple of the duration of the first chip, or the duration of the first chip is an integer multiple of the duration of the second chip;

[0131] The ratio of the duration of the first chip to the duration of the second chip violates the coding rule of linear coding;

[0132] In the case that the duration of the last chip in the start indicator part is variable, the value of the last chip belongs to at least one of a first range and a second range;

[0133] The minimum value of the first range is the difference between the duration of the OFDM symbol and the duration of the first chip, and the maximum value of the first range is the sum of the duration of the OFDM symbol and the duration of the CP minus the duration of the first chip. The minimum value of the second range is the difference between the duration of the OFDM symbol and the second value, and the maximum value of the first range is the difference between the sum of the duration of the OFDM symbol and the duration of the CP and the second value, and the second value is the sum of the duration of the first chip and the duration of the second chip;

[0134] The first chip is an on chip in the target chip and the second chip is an off chip in the target chip in the case that the duration of the last chip in the start indicator part is variable, and the first chip is an on chip in the start indicator part and the second chip is an off chip in the start indicator part in the case that the duration of each chip in the start indicator part is fixed.

[0135] In the embodiments of the present application, the coding rule that is violated is X1:X2≠2:1 or X1:X2≠1:2, for example, X1:X2=3:1 or X1:X2=1:3. Wherein, X1 is the duration of the first chip, and X2 is the duration of the second chip.

[0136] Optionally, the duration of the first chip is not equal to the candidate chip duration of the PRDCH, which can be understood as the duration of the first chip is not equal to the candidate chip duration of any PRDCH; the duration of the second chip is not equal to the candidate chip duration of the PRDCH, which can be understood as the duration of the second chip is not equal to the candidate chip duration of any PRDCH.

[0137] Optionally, in some embodiments, in the case that the duration of the last chip in the start indicator part is variable, the duration of the second chip is equal to the first value minus the duration of the first chip.

[0138] It should be noted that, in the embodiments of the present application, the duration of the on chip and off chip of the start indicator part is defined, thereby facilitating the implementation of the protocol and reducing the detection difficulty.

[0139] Optionally, in some embodiments, the first information further includes a check bit, and the check bit is located at the last N bits of the target OFDM symbol.

[0140] In the embodiments of the present application, the value of N can be agreed by the protocol or configured by the network side device, for example, in some embodiments, N is 1 or 2. Since the check bit is added at the end of the target OFDM symbol, the AIoT device can correctly find the OFDM symbol boundary based on the start indicator part.

[0141] Optionally, the above-mentioned target OFDM can be understood as the first OFDM symbol after the start indicator part.

[0142] For example, in some embodiments, the end position of the start indicator part is aligned with the boundary of the OFDM symbol, and the check bit is added at the last N bits of the first OFDM symbol after the start indicator part.

[0143] Optionally, in some embodiments, the check bit satisfies at least one of the following:

[0144] The level of the chip generated by the check bit is the same as the level of the last N chips of the start indicator part;

[0145] The level of the last chip generated by the check bit is the same as the level of the first chip of the clock acquisition part, and the level of the last chip of the start indicator part is different from the level of the first chip of the clock acquisition part.

[0146] In the embodiments of the present application, a check bit can be added at the end of the first OFDM symbol after the start indicator part, which can ensure that the level of the added CP is the same as that of the last chip of the start indicator part, so that the duration of the last chip of the start indicator part is fixed and will not change due to the added CP. Alternatively, the last chip of the start indicator part and the first chip of the clock part do not appear extra pulses. The AIoT device can correctly find the OFDM symbol boundary through the start indicator part, that is, the end position of the start indicator part is the start position of the OFDM boundary.

[0147] Optionally, in some embodiments, the first information satisfies at least one of the following:

[0148] The start indicator part or the clock acquisition part carries reference chip information;

[0149] The clock acquisition part carries target indication information, and the target indication information is used to indicate second information.

[0150] The second information includes at least one of the following: chip duration of a target channel or a target signal or target information; modulation parameter of the target channel or the target signal or the target information.

[0151] It should be understood that in the embodiments of the present application, the target signal can be an OOK signal, the target channel can be a PRDCH or a PDRCH, and the target information can be understood as information carried by the target signal or the target channel, such as layer 1 control information or data information.

[0152] In the embodiments of the present application, the start indicator part or the clock acquisition part carries reference chip information, and the clock acquisition part carries target indication information. Assuming that the pattern or sequence of the reference chip information is fixed, and the modulation parameter M of the signal carrying the reference chip information is also fixed, the AIoT device can obtain the clock number of a reference chip according to the clock of the reference chip information, and thus obtain the duration of an OFDM symbol.

[0153] Optionally, in some embodiments, the signal used to carry the reference chip information contains at least three edges.

[0154] In the embodiments of the present application, the signal carrying the reference chip information contains at least three edges, i.e., the signal contains at least two chips, for the AIOT device to determine the clock number of the reference chip. The above-mentioned edges can be understood as the rising edge and the falling edge of a chip, for example, there is a rising edge from the off chip to the on chip, and a falling edge from the on chip to the off chip; or to say, the two ends of each chip correspond to a rising edge and a falling edge respectively.

[0155] Optionally, in some embodiments, the target indication information satisfies at least one of the following conditions:

[0156] The signal carrying the target indication information and the signal carrying the reference chip information use the same modulation parameter;

[0157] The signal carrying the target indication information uses a fixed modulation parameter, and the durations corresponding to different target indication information are different;

[0158] The pattern or sequence corresponding to the target indication information is fixed, and the durations corresponding to different target indication information are determined according to the indicated second information; or the pattern or sequence corresponding to the target indication information is determined according to the indicated second information;

[0159] The target indication information is used to indicate at least one of the second information of the reader-to-device transmission channel PRDCH and the second information of the device-to-reader transmission PDRCH;

[0160] The target indication information is used to indicate at least one of the second information of the layer 1 control information and the second information of the data information.

[0161] Optionally, in some embodiments, the signal carrying the target indication information and the signal carrying the reference chip information use the same modulation parameter, which simplifies the detection complexity of the UE. Of course, in some embodiments, the signal carrying the target indication information and the signal carrying the reference chip information can also be set to use different modulation parameters, to solve the problem of reducing the transmission (preamble or clock acquisition part) overhead.

[0162] Optionally, the modulation parameter of the signal carrying the target indication information is protocol predefined or indicated by the network side or the Reader side.

[0163] Optionally, the modulation parameter of the signal carrying the reference chip information is protocol predefined or indicated by the network side or the Reader side.

[0164] Optionally, in some embodiments, the pattern or sequence corresponding to the target indication information is fixed, i.e. different target indication information is modulated using the same pattern or sequence, and the duration of different target indication information is determined according to the indicated second information, for example, the duration of each chip of the signal carrying the target indication information is the same as the chip duration of the target signal or target channel or target information indicated by the target indication information, or the modulation parameter of the signal carrying the target indication information is the same as the modulation parameter of the target signal or target channel or target information.

[0165] Optionally, in some embodiments, the pattern or sequence corresponding to the target indication information is determined according to the chip duration of the indicated target signal or target channel or target information, or determined according to the modulation parameter of the indicated target signal or target channel or target information, i.e. different target indication information is modulated using different patterns or sequences.

[0166] Optionally, the duration of different target indication information is the same.

[0167] Optionally, the duration of each chip of the signal carrying the target indication information is the same as the chip duration of the target signal or target channel or target information indicated by the target indication information, or the modulation parameter of the signal carrying the target indication information is the same as the modulation parameter of the target signal or target channel or target information indicated by the target indication information.

[0168] Optionally, the pattern or sequence corresponding to the target indication information is determined according to the pattern or sequence obtained after encoding the chip duration of the indicated target signal or target channel or target information, or determined according to the pattern or sequence obtained after encoding the modulation parameter of the target signal or target channel or target information.

[0169] Optionally, the chip duration or modulation parameter M of the above-mentioned signal carrying layer 1 control information can include at least one of the chip duration or modulation parameter M of the signal carrying layer 1 control information of PRDCH and the chip duration or modulation parameter M of the signal carrying layer 1 control information of PDRCH. The chip duration or modulation parameter M of the above-mentioned signal carrying data information can include at least one of the chip duration or modulation parameter M of the signal carrying data information of PRDCH and the chip duration or modulation parameter M of the signal carrying data information of PDRCH.

[0170] Optionally, in some embodiments, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PDRCH are different.

[0171] Optionally, in some embodiments, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information and the chip duration or modulation parameter M of the signal carrying the data information are different.

[0172] In the embodiments of the present application, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PDRCH can be respectively indicated by one target indication information, for example, two first indication fields are included in the target indication information, and the two first indication fields respectively indicate the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PDRCH. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PDRCH are the same, the target indication information can include only one first indication field.

[0173] For example, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PDRCH can also be respectively indicated by carrying two target indication information. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PDRCH are the same, only one target indication information can be included.

[0174] Optionally, the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the data information of the PDRCH can be respectively indicated by one target indication information, for example, two second indication fields are included in the target indication information, and the two second indication fields respectively indicate the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the data information of the PDRCH. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the data information of the PDRCH are the same, the target indication information can include only one second indication field.

[0175] For example, the chip duration or modulation parameter M of the signal carrying the data information of PRDCH and the chip duration or modulation parameter M of the signal carrying the data information of PDRCH can also be indicated by carrying two target indication information respectively. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the data information of PRDCH and the chip duration or modulation parameter M of the signal carrying the data information of PDRCH are the same, only one target indication information can be contained.

[0176] The chip duration or modulation parameter M of the signal carrying the data information of PRDCH, the chip duration or modulation parameter M of the signal carrying the layer 1 control information of PRDCH can be indicated by one target indication information, for example, two second indication fields are contained in the target indication information, and the two second indication fields respectively indicate the chip duration or modulation parameter M of the signal carrying the data information of PRDCH and the chip duration or modulation parameter M of the signal carrying the layer 1 control information of PRDCH. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the data information of PRDCH and the chip duration or modulation parameter M of the signal carrying the layer 1 control information of PRDCH are the same, the target indication information can only contain one second indication field.

[0177] For example, the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH can also be indicated by carrying two target indication information respectively. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH and the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH are the same, only one target indication information can be contained. The chip duration or modulation parameter M of the signal carrying the data information of the PRDCH, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH, and the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH can be respectively indicated by one target indication information, for example, three second indication fields are contained in the target indication information, and the three second indication fields respectively indicate the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH, and the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH, and the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH are the same, the target indication information can only contain one second indication field.

[0178] For example, the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH, and the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH can also be indicated by carrying three target indication information respectively. In some embodiments, in the case that the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH, the chip duration or modulation parameter M of the signal carrying the Layer 1 control information of the PRDCH, and the chip duration or modulation parameter M of the signal carrying the data information of the PRDCH are the same, only one target indication information can be contained.

[0179] It should be understood that, for two target indication information, in the case that the two target indication information indicate different chip duration or modulation parameter M, then the two target indication information are considered as different target indication information. For example, one target indication information 1 indicates M = 1, and another target indication information 2 indicates M = 2, at this time, it is indicated that the target indication information 1 and the target indication information 2 are different target indication information.

[0180] In the embodiments of the present application, the duration of each chip is defined, thereby reducing the difficulty of protocol implementation.

[0181] Optionally, in some embodiments, the ratio of the on-chip and off-chip durations in the clock acquisition part violates the encoding rule of linear coding, thereby facilitating the differentiation from subsequent transmission. For example, the on-chip duration in the clock acquisition part is Y1, and the off-chip duration is Y2, Y1:Y2≠2:1, or Y1:Y2≠1:2, for example, Y1:Y2=3:1, or Y1:Y2=1:3. Alternatively, the on-chip duration in the clock acquisition part is not fixed, or the off-chip duration is not fixed, and there is at least one on-chip and off-chip duration ratio after it that violates the encoding rule of linear coding.

[0182] In order to better understand the present application, the following is described in detail through some examples.

[0183] The first information transmitted between the reader and the AIoT device satisfies at least one of the following:

[0184] a) the start position of the start indicator part is aligned with the boundary of the OFDM symbol or the CP boundary, and the end position of the clock-acquisition part is aligned with the boundary of the OFDM symbol;

[0185] b) the start position of the start indicator part is aligned with the boundary of the OFDM symbol or the CP boundary, and the start position of the clock-acquisition part is aligned with the boundary of the OFDM symbol;

[0186] c) the start position of the clock-acquisition part is aligned with the boundary of the OFDM symbol, and a check bit is added at the end of the first OFDM symbol after the start indicator part;

[0187] d) the end position of the clock-acquisition part is aligned with the boundary of the OFDM symbol, and the start part of the start indicator part can not be aligned with the OFDM symbol boundary or CP;

[0188] e) the start indicator part or clock acquisition part carries reference chip information, and / or the clock acquisition part carries target indication information.

[0189] For the case a) above, the total duration of off-chip in the start indicator part is fixed, and the total duration of on-chip is variable to ensure that the start position of the start indicator part is aligned with the boundary of OFDM symbol, or the start position of on-chip in the start indicator part is aligned with the boundary of OFDM symbol or CP boundary.

[0190] wherein the duration of one off-chip is X2, determined according to at least one of:

[0191] the duration of OFDM symbol T1;

[0192] the duration of CP T2;

[0193] a first time, which is the duration of the clock acquisition part;

[0194] a second time, which is the duration T3 of one or more chips or off-chip in the CP.

[0195] wherein the first time can be the minimum clock acquisition part duration.

[0196] the duration of one on-chip is X1, determined according to at least one of:

[0197] the duration of OFDM symbol;

[0198] the duration of CP;

[0199] the duration of off-chip;

[0200] the duration of off-chip in the OFDM symbol where the on-chip is located;

[0201] the duration of the preamble;

[0202] a first time, which is the duration of the clock acquisition part;

[0203] the total duration of off-chip in the start indicator part.

[0204] Example 1: Let the subcarrier spacing be 15 kHz, the duration of one OFDM symbol T1 = 2048*T s ≈ 4.69us, then the duration of one off chip X2 = T1 + T2 - clock acquisition part duration, T s ≈ 4.69us, then the duration of one off chip X2 = T1 + T2 - clock acquisition part duration, T s represents the sampling period, i.e. the sampling time of the OFDM symbol with FFT size of 2048 points in LTE.

[0205] Assume that the pattern of clock-acquisition is the same for different M, but the duration is different, the duration of clock-acquisition part is minimum when M = 24. As shown in Figure 3A, the start indicator part includes 2 chips (on-off), the clock-acquisition part includes 4 chips (on-off-on-off), then the minimum clock acquisition part duration = T1 / 24*4 ≈ 11.12us, the duration of one off chip X2 = T1 + T2 - minimum clock acquisition part duration = 60.24us. Or as shown in Figure 3B, the clock-acquisition part includes 5 chips (on-off-on-off-off), then the minimum clock acquisition part duration = T1 / 24*5 ≈ 13.89us, the duration of one off chip X2 = T1 + T2 - minimum clock acquisition part duration = 57.49us.

[0206] The duration of one on chip X1 can be varied to ensure that the start position of the start indicator part is aligned with the boundary of the OFDM symbol, or the start position of the on chip of the start indicator part is aligned with the boundary of the OFDM symbol / CP boundary. X1 is equal to the duration of the OFDM symbol minus the duration of the off chip in the OFDM symbol where the on chip is located, or X1 is equal to the duration of the OFDM symbol plus the duration of the CP minus the duration of the off chip in the OFDM symbol where the on chip is located, or X1 is equal to the duration of the preamble minus the duration of the clock acquisition part minus the total duration of the off chip in the start indicator part.

[0207] If the last 2 chips of the clock-acquisition part are on-off respectively, due to the decrease of the duration of one chip as M increases, it is possible that the added CP is not all off, but the pattern of "on-off". Considering that the AIoT device can tolerate the duration deviation of the start indicator part detection, therefore, the duration of the ideal off chip can be obtained according to the CP duration, for example, the AIoT device can still correctly detect the start indicator according to the duration of the ideal off chip 60.24us. Or, the duration of each chip in the CP can be determined according to the actual added CP, so as to calculate the duration of the off chip in the start indicator part, at this time the duration of one off chip X2 = T1 + T3-clock acquisition part duration, T3 is the duration of the off chip in the CP. With the same assumptions as above, the duration of one off chip X2 = T1 + T3-minimum clock acquisition part duration = 58.34us, as shown in FIG. 3C.

[0208] If the start indicator part contains more than 2 chips, for example on-off-on-off (as shown in FIG. 3D and FIG. 3E), the duration of one off chip in the start indicator is calculated the same as the corresponding embodiment in FIG. 3A and FIG. 3B above, and the duration of one on chip in the start indicator is variable to ensure that the start position of the on chip in the start indicator is aligned with the boundary of OFDM symbol / CP boundary, if the added CP of the OFDM symbol where the on chip is located is on, then aligned with the CP boundary of OFDM, X1 = the duration of OFDM symbol plus the duration of CP minus the duration of off chip in the OFDM symbol where the on chip is located; if the added CP is off, then aligned with the boundary of OFDM symbol, X1 = the duration of OFDM symbol minus the duration of off chip in the OFDM symbol where the on chip is located.

[0209] For the case b) above, the duration of the last chip in the start indicator part is variable (due to CP), and the duration of the rest of chips is fixed.

[0210] where the fixed duration of each on chip in the start indicator part is X1, the fixed duration of each off chip is X2, and the duration of the last chip with variable duration is X3, and at least one of the following is satisfied:

[0211] X1 is not equal to any candidate chip duration of PRDCH;

[0212] X2 is not equal to any candidate chip duration of PRDCH;

[0213] X2 = (T1 + T2 - X1);

[0214] X2 is an integer multiple of X1 or X1 is an integer multiple of X2;

[0215] The duration ratio of X1 and X2 violates the encoding rule of linear coding (e.g., Manchester), for example, X1 : X2 = 3 : 1, or X1 : X2 = 1 : 3;

[0216] X3 is in the range of (T1 + T2 - X1) to (T1 - X1);

[0217] X3 is in the range of (T1 - X1 - X2) to (T1 + T2 - X1 - X2).

[0218] wherein T1, T2 and T3 can refer to the definitions of the above embodiments, which are not repeated here.

[0219] Example two: assuming that the AIoT device can identify the CP position and the OFDM symbol boundary through the start indicator part, at least containing a rising or falling edge, such as 2 on-chip and one off-chip, so that the device can count the clock number of the chip to obtain the clock number of an OFDM symbol and the OFDM boundary.

[0220] Let the subcarrier spacing be 15 kHz, the duration of an OFDM symbol T1, and the duration of the CP T2, as shown in the following FIG. 4A, the start indicator part includes 4 chips (on-off-on-off), and the start position of the clock acquisition part is aligned with the OFDM symbol boundary. The start position of the first on-chip is aligned with the boundary of the OFDM symbol. Let the fixed duration of each on-chip be X1, the fixed duration of each off-chip be X2, and the duration of the last off-chip of the variable duration be X3, then the total duration of an adjacent fixed on-chip and a fixed off-chip is X1+X2=T1+T2.

[0221] Optionally, the duration of X1 is not equal to the duration of any subsequent chip of the PRDCH.

[0222] Optionally, X2 is an integer multiple of X1 or X1 is an integer multiple of X2, and the durations of X1 and X2 violate the coding rules of linear coding (such as Manchester). For example, X1:X2=3:1 or X1:X2=1:3, which can make the design of the start indicator part distinguishable from the subsequent PRDCH, so that the device will not misidentify the PRDCH as the start indicator part. Due to the CP change caused by the clock acquisition part or the PRDCH, X3 will float in the range of (T1+T2-X1) to (T1-X1) due to the added CP. The AIoT device can obtain the clock number of an OFDM symbol and the OFDM boundary by counting the clock number of the fixed duration chip, and correctly remove the CP of the OFDM symbol where the clock acquisition part is located.

[0223] As shown in Fig. 4B, the start indicator part includes 3 chips (on-off-on), and the start position of the clock-acquisition part is aligned with the OFDM symbol boundary, and the start position of the first on chip is aligned with the OFDM symbol boundary. At this time, the start indicator part is within one OFDM symbol, and the duration of the last on chip of the variable duration X3 is within the range of (T1-X1-X2) to (T1+T2-X1-X2) (CP variation due to the clock acquisition part or PRDCH).

[0224] For the above case c), the check bit satisfies at least one of the following:

[0225] The level of the last chip of the start indicator part is the same as the level of the chip generated by the check bit (CP occupies one chip) ;

[0226] The level of the last two chips of the start indicator part is the same as the level of the chip generated by the check bit (CP occupies more than one chip) ;

[0227] The level of the last chip of the start indicator part and the level of the first chip of the clock acquisition part are different, and the level of the last chip generated by the check bit is the same as the level of the first chip of the clock acquisition part (CP occupies more than one chip) ; At this time, the level of the chip before the last chip generated by the check bit is also the same as the level of the last chip of the start indicator part.

[0228] Optionally, the start position of the start indicator part is aligned with the OFDM symbol boundary or the CP boundary;

[0229] Optionally, the duration of each chip in the start indicator part is fixed, the fixed duration of each on chip is X1, the fixed duration of each off chip is X2, and at least one of the following is satisfied:

[0230] X1 is not equal to the candidate chip duration of any PRDCH;

[0231] X2 is not equal to the candidate chip duration of any PRDCH;

[0232] X2 is an integer multiple of X1 or X1 is an integer multiple of X2;

[0233] The duration ratio of X1 and X2 violates the linear coding.

[0234] Example three: as shown in FIG. 5, a check bit is added at the end of the first OFDM symbol after the start indicator part, which can ensure that the level of the added CP is the same as that of the last chip of the start indicator part, so that the duration of the last chip of the start indicator part is fixed and will not change due to the added CP. Alternatively, so that no extra pulse appears between the last chip of the start indicator part and the first chip of the clock part. The AIoT device can correctly find the OFDM symbol boundary through the start indicator part, i.e., the end position of the start indicator part is the starting position of the OFDM boundary.

[0235] For the above case d), the end position of the clock-acquisition part aligns with the boundary of the OFDM symbol, and the start of the start indicator part can not align with the OFDM symbol boundary or CP.

[0236] The duration of an off chip in the start indicator part is fixed, and the duration of an off chip in the start indicator part is X2, which is determined according to at least one of the following:

[0237] The duration T1 of the OFDM symbol;

[0238] The duration T2 of the CP;

[0239] A first time, the first time being the duration of the clock-acquisition part;

[0240] A second time, the second time being the duration of one or more chips or off chips in the CP, i.e., T3.

[0241] The duration of an on chip in the start indicator part is X1, which is determined according to at least one of the following:

[0242] The duration T1 of the OFDM symbol;

[0243] The duration T2 of the CP;

[0244] The duration of the off-chip is X2.

[0245] Optionally, the duration of the on-chip in the start indicator part is fixed.

[0246] Example four: As shown in Fig. 6A and Fig. 6B, the same as example one is that the duration of the off-chip in the start indicator part is fixed, and the way of determining the duration of the off-chip is the same. The difference from example one is that it is not necessary to ensure the start position of the start indicator part to be aligned with the boundary of the OFDM symbol or the start position of the on-chip in the start indicator part to be aligned with the boundary of the OFDM symbol or the CP boundary, i.e. the start position of the start indicator part can not be aligned with the boundary of the OFDM symbol. In this case, it is easier to realize that the duration of the on-chip X1 is fixed, but X1 needs to satisfy X1≤T1+T2-X2, so as to avoid extra pulses due to the CP between the on-chip and the off-chip of the start indicator. Since the Reader needs to align the boundary of the OFDM symbol when sending the signal, the Reader can send any signal based on the remaining part of the start OFDM symbol where the start indicator is located. Similarly, when the duration of the CP exceeds one chip duration, the duration of X1 and X2 can have a certain range of error.

[0247] For the above case e), the target indication information can include the chip duration of the target signal or the target channel or the target information, the modulation parameter M of the target signal or the target channel or the target information. For example, M represents that the duration of M chips is equal to the duration of one OFDM symbol.

[0248] Optionally, in some embodiments, the signal for carrying the reference chip information contains at least three edges.

[0249] The modulation parameter M of the signal for carrying the reference chip information and the modulation parameter M of the signal for carrying the target indication information can be the same or different (i.e. the duration of each chip of the signal for carrying the reference chip information and the signal for carrying the target indication information can be the same or different), for example, the signal for carrying the reference chip information and the signal for carrying the target indication information are both modulated with M=1, or the signal for carrying the reference chip information is modulated with M1=1 and the signal for carrying the target indication information is modulated with M2=4.

[0250] Optionally, the modulation parameter M1 of the signal for carrying the reference chip information is predefined and the modulation parameter M2 of the signal for carrying the target indication information is predefined.

[0251] Optionally, the signal for carrying the target indication information uses a fixed modulation parameter, and different target indication information corresponds to different durations.

[0252] Optionally, the pattern or sequence corresponding to the target indication information is determined according to the indicated second information, and different target indication information is modulated using different patterns or sequences.

[0253] Optionally, the durations of different target indication information are the same, for example, the duration of the target indication information 1 indicating the modulation parameter M=1 of the target channel / signal / information is the same as the duration of the target indication information 2 indicating the modulation parameter M=2 of the target channel / signal / information.

[0254] Optionally, the duration of each chip of the signal for carrying the target indication information is the same as the chip duration of the target signal or target channel or target information indicated by the target indication information, or the modulation parameter of the signal for carrying the target indication information is the same as the modulation parameter of the target signal or target channel or target information indicated by the target indication information.

[0255] Optionally, the target indication information is used to indicate at least one of the second information of the reader-to-device transmission channel PRDCH and the second information of the device-to-reader transmission PDRCH;

[0256] The target indication information is used to indicate at least one of the second information of the layer 1 control information and the second information of the data information.

[0257] Example five: the start indicator part or the clock acquisition part carries the reference chip information, and the clock acquisition part carries the target indication information of the target signal or the target channel or the target information. Assuming that the pattern / sequence of the signal used to carry the reference chip information is fixed, the second information of the signal used to carry the reference chip information is also fixed, and the AIoT device can obtain the clock number of a reference chip according to the clock of the reference chip information.

[0258] As shown in FIG. 7A and 7B, one possible implementation is that the pattern / sequence of the signal carrying the target indication information of the target signal or target channel or target information is fixed, for example, off-on-off-on, so the duration of different target indication information is different, the AIoT device obtains the second information, for example, the chip duration, by counting the number of clocks of the target indication information, according to the number of clocks of the target indication information and the number of chips contained in the target indication information, and the number of clocks of a reference chip, that is, the duration of the chip indicated by the indication information. The signal carrying the reference chip information contains at least three edges, that is, the signal contains at least two chips, in the above implementation, the signal contains three chips, for example, on-off-on, and the level of the last chip of the signal carrying the reference chip information is different from that of the first chip of the signal carrying the target indication information, and another possible implementation is that the signal contains two chips, for example, on-off, and the level of the last chip of the signal carrying the reference chip information is different from that of the first chip of the signal carrying the target indication information, then the signal carrying the reference chip information and the signal carrying the target indication information can be as shown in FIG. 7C and 7D. The number of chips of the signal carrying the reference chip information in the above example of FIG. 7C and 7D is 2 or 3, which is also applicable to other quantities. The signal design of the reference chip information of other embodiments in the present application can refer to the above design, which will not be described hereinafter. As shown in FIG. 7E and 7F, another possible implementation is that the pattern / sequence of the target indication information is determined according to the indicated content, the pattern / sequence can be predefined, for example, off-on-off for M=1, off-on-off-on-off-on for M=2, off-on-off-on-off-on-off-on-off-on-off-on for M=4, and the duration of the target indication information is the same, then the AIoT device determines the clock by the reference chip information, and detects the pattern / sequence of the target indication information in the duration of the target indication information, so as to obtain the indicated content (for example, modulation M). The AIoT device can determine the number of clocks of the OFDM symbol and the CP according to the reference chip information, then the duration of each chip indicated is (the number of clocks of the OFDM symbol+the number of clocks of the CP)÷M, or =the number of clocks of the OFDM symbol÷M.

[0259] For example, as shown in FIGS. 7G and 7H, the indicated content (e.g., modulation M) can be encoded, the pattern / sequence of the target indication information is determined, and the overhead of the target indication information is saved, for example, encoded into a 4-bit binary sequence, M=1 corresponds to the sequence 0001, M=2 corresponds to the sequence 0010, and M=4 corresponds to the sequence 0100. Alternatively, considering that the first chip of the target indication information is different from the chip before the first chip of the target indication information, the different information can be better distinguished, so a reserved bit can be added in front of the encoded 4-bit binary sequence, the reserved bit is not used for indication of the target indication information, and is used for distinguishing from the previous information. The target indication information is x0001, x0010, x0100, x can be a fixed value (if the previous chip is fixed), or is the opposite value according to the previous chip. Assuming that the signal used to carry the reference chip information contains two chips, for example, on-off, and the last chip of the signal used to carry the reference chip information is different from the level of the first chip of the signal used to carry the target indication information, the signal used to carry the reference chip information and the signal used to carry the target indication information are updated as shown in FIGS. 7I and 7J. The number of chips of the signal used to carry the reference chip information shown in the above examples is 2 or 3, and is also applicable to other numbers.

[0260] As shown in FIGS. 7K and 7L, the indicated content can also be encoded according to the supportable candidate M, and the overhead of the target indication information can be further saved. For example, the supportable candidate M is 1, 2, 4, 6, 8, 12, 16, and 24, and a 3-bit binary sequence can be used for indication, M=1 corresponds to the sequence 001, M=2 corresponds to the sequence 010, M=4 corresponds to the sequence 011, M=6 corresponds to the sequence 100, and the like. Considering that the first chip of the target indication information is different from the chip before the first chip of the target indication information, a reserved bit can also be added for distinguishing, and the indication information of M is x001, x010, x011, and x100.

[0261] As shown in FIGS. 7M and 7N, the modulation mode of OOK is used to modulate the binary sequence of the encoded target indication information, and the modulation parameters M of the signal used to carry the target indication information and the modulation parameters M of the signal used to carry the reference chip information can be the same or different, for example, the signal used to carry the reference chip information and the signal used to carry the target indication information are both modulated with M = 1, or the signal used to carry the reference chip information is modulated with M = 1 and the signal used to carry the target indication information is modulated with M = 4 (M indication overhead can be saved).

[0262] If the clock of the clock is determined by the AIoT device in the start indicator part, only the target indication information needs to be included in the clock acquisition part of the preamble, which is used to determine the M of the subsequent transmission of the AIoT device.

[0263] Referring to FIG. 8, the application also provides a preamble-based transmission method, comprising:

[0264] Step 801, the receiving end receives the first information from the sending end, and the first information includes the preamble;

[0265] The preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate the R2D transmission start of the reader to the device, and the clock acquisition part is used for transmission synchronization.

[0266] Optionally, the first information satisfies at least one of the following:

[0267] The start position of the start indicator part is aligned with the boundary of the OFDM symbol or the boundary of the CP;

[0268] The end position of the start indicator part is aligned with the boundary of the OFDM symbol;

[0269] The start position of the clock acquisition part is aligned with the boundary of the OFDM symbol;

[0270] The end position of the clock acquisition part is aligned with the boundary of the OFDM symbol.

[0271] Optionally, the total duration of the off chip of the start indicator part is fixed, and the total duration of the on chip is variable;

[0272] Alternatively, the total duration of the off chip in the start indicator part is fixed.

[0273] Optionally, a duration of one off chip in the start indicator portion is determined based on at least one of:

[0274] a duration of an OFDM symbol;

[0275] a duration of a CP;

[0276] a first time, the first time being a duration of the clock acquisition portion;

[0277] a second time, the second time being a duration of one or more chips or off chips in the CP.

[0278] Optionally, a duration of one on chip in the start indicator portion is determined based on at least one of:

[0279] a duration of an OFDM symbol;

[0280] a duration of a CP;

[0281] a duration of off chips;

[0282] a duration of off chips in an OFDM symbol in which the on chip is located;

[0283] a duration of the preamble;

[0284] a first time, the first time being a duration of the clock acquisition portion;

[0285] a total duration of off chips in the start indicator portion.

[0286] Optionally, the start indicator portion satisfies any one of:

[0287] a duration of a last chip in the start indicator portion is variable and a duration of a target chip other than the last chip in the start indicator portion is fixed;

[0288] a duration of each chip in the start indicator portion is fixed.

[0289] Optionally, the start indicator portion further satisfies at least one of:

[0290] a duration of a first chip is not equal to a candidate chip duration of a channel PRDCH for a reader-to-device transmission;

[0291] a duration of a second chip is not equal to a candidate chip duration of the PRDCH;

[0292] The duration of the second chip is equal to the first value minus the duration of the first chip, the first value being the sum of the duration of the OFDM symbol and the duration of the CP;

[0293] The duration of the second chip is an integer multiple of the duration of the first chip, or the duration of the first chip is an integer multiple of the duration of the second chip;

[0294] The ratio of the duration of the first chip and the duration of the second chip violates the coding rule of the linear coding;

[0295] In the case that the duration of the last chip in the start indicator part is variable, the value of the last chip belongs to at least one of the first range and the second range;

[0296] The minimum value of the first range is the difference between the duration of the OFDM symbol and the duration of the first chip, and the maximum value of the first range is the sum of the duration of the OFDM symbol and the duration of the CP minus the duration of the first chip. The minimum value of the second range is the difference between the duration of the OFDM symbol and the second value, and the maximum value of the first range is the difference between the sum of the duration of the OFDM symbol and the duration of the CP and the second value, the second value being the sum of the duration of the first chip and the duration of the second chip;

[0297] The first chip is the on chip in the target chip and the second chip is the off chip in the target chip in the case that the duration of the last chip in the start indicator part is variable, and the first chip is the on chip in the start indicator part and the second chip is the off chip in the start indicator part in the case that the duration of each chip in the start indicator part is fixed.

[0298] Optionally, the first information further comprises a check bit, and the check bit is located at the last N bits of the target OFDM symbol.

[0299] Optionally, the check bit satisfies at least one of the following conditions:

[0300] The level of the chip generated by the check bit is the same as the level of the last N chips of the start indicator part;

[0301] The level of the last chip generated by the check bit is the same as the level of the first chip of the clock acquisition part, and the level of the last chip of the start indicator part is different from the level of the first chip of the clock acquisition part.

[0302] Optionally, the first information satisfies at least one of the following:

[0303] The start indicator part or the clock acquisition part carries reference chip information;

[0304] The clock acquisition part carries target indication information, and the target indication information is used to indicate second information;

[0305] The second information includes at least one of the following: chip duration of a target channel or a target signal or target information; modulation parameter of the target channel or the target signal or the target information.

[0306] Optionally, the signal used to carry the reference chip information contains at least three edges.

[0307] Optionally, the target indication information satisfies at least one of the following:

[0308] The signal used to carry the target indication information and the signal used to carry the reference chip information use the same modulation parameter;

[0309] The signal used to carry the target indication information uses a fixed modulation parameter, and different target indication information corresponds to different time durations;

[0310] The pattern or sequence corresponding to the target indication information is fixed, and different target indication information corresponds to different time durations according to the indicated second information; or the pattern or sequence corresponding to the target indication information is determined according to the indicated second information;

[0311] The target indication information is used to indicate at least one of the following: second information of a PRDCH (Reader-to-Device Channel) and second information of a PDRCH (Device-to-Reader Channel);

[0312] The target indication information is used to indicate at least one of the following: second information of layer 1 control information and second information of data information.

[0313] Optionally, the second information of the PRDCH and the second information of the PDRCH are different.

[0314] Optionally, the second information of the layer 1 control information and the second information of the data information are different.

[0315] Optionally, the reference chip information carried by the clock acquisition part is used to determine second information of subsequent layer 1 control information.

[0316] Or, the target indication information is used to determine second information of subsequent data information.

[0317] Optionally, there is at least one on chip and off chip duration ratio in the clock collection part, which violates the encoding rule of linear coding.

[0318] The execution subject of the preamble-based transmission method provided in the embodiments of the present application can be a preamble-based transmission device. In the embodiments of the present application, the preamble-based transmission method is executed by the preamble-based transmission device, and the preamble-based transmission device provided in the embodiments of the present application is described by way of example.

[0319] The preamble-based transmission device provided in the embodiments of the present application can be a communication device or a component in the communication device, for example, a chip. The communication device can be a terminal, a network side device, a server or the like. For example, the terminal can include, but is not limited to, the types of the terminal 11 listed above, the network side device can include, but is not limited to, the types of the network side device 12 listed above, and the embodiments of the present application are not limited in this regard.

[0320] The preamble-based transmission device includes a receiving module, a sending module and a processing module. The receiving module, the sending module and the processing module can be implemented by software or by hardware. When implemented by hardware, the processing module can be implemented by a processor, for example, a general processor, a special-purpose processor, a central processing unit (CPU), a microprocessor, a digital signal processor (DSP), an artificial intelligent (AI) processor, a graphics processing unit (GPU), an application specific integrated circuit (ASIC), a network processor (NP), a field programmable gate array (FPGA) or other programmable logic devices, a gate circuit, a transistor, a discrete hardware component or the like. The receiving module and the sending module can be implemented by a communication interface, which can include one or more of a transceiver, a pin, a circuit, a bus, a radio frequency unit and the like.

[0321] Specifically, referring to FIG. 9, when the preamble-based transmission device is a terminal or a component in the terminal, the preamble-based transmission device 900 includes:

[0322] The processing module 901 is configured to generate a preamble.

[0323] The sending module 902 is configured to send first information, wherein the first information comprises the preamble.

[0324] The preamble comprises a start indicator part and a clock acquisition part, the start indicator part is used to indicate a start of a R2D transmission of the reader to the device, and the clock acquisition part is used to transmit synchronization.

[0325] Optionally, the first information satisfies at least one of the following conditions:

[0326] The start position of the start indicator part is aligned with a boundary of an OFDM symbol or a boundary of a CP.

[0327] The end position of the start indicator part is aligned with a boundary of the OFDM symbol.

[0328] The start position of the clock acquisition part is aligned with a boundary of the OFDM symbol.

[0329] The end position of the clock acquisition part is aligned with a boundary of the OFDM symbol.

[0330] Optionally, a total duration of off chips in the start indicator part is fixed, and a total duration of on chips in the start indicator part is variable.

[0331] Alternatively, a total duration of off chips in the start indicator part is fixed.

[0332] Optionally, a duration of one off chip in the start indicator part is determined based on at least one of the following conditions:

[0333] A duration of the OFDM symbol;

[0334] A duration of the CP;

[0335] A first time, the first time being a duration of the clock acquisition part;

[0336] A second time, the second time being a duration of one or more chips or off chips in the CP.

[0337] Optionally, a duration of one on chip in the start indicator part is determined based on at least one of the following conditions:

[0338] A duration of the OFDM symbol;

[0339] A duration of the CP;

[0340] A duration of the off chip;

[0341] a duration of off-chip in the OFDM symbol in which the chip is located;

[0342] a duration of the preamble;

[0343] a first time, the first time being a duration of the clock acquisition part;

[0344] a total duration of off-chip in the start indicator part.

[0345] Optionally, the start indicator part satisfies any one of the following:

[0346] a duration of a last chip in the start indicator part is variable, and a duration of a target chip other than the last chip in the start indicator part is fixed;

[0347] a duration of each chip in the start indicator part is fixed.

[0348] Optionally, the start indicator part further satisfies at least one of the following:

[0349] a duration of the first chip is not equal to a candidate chip duration of a channel PRDCH for the reader-to-device transmission;

[0350] a duration of the second chip is not equal to a candidate chip duration of the PRDCH;

[0351] a duration of the second chip is equal to a first value minus a duration of the first chip, the first value being a sum of a duration of the OFDM symbol and a duration of the CP;

[0352] a duration of the second chip is an integer multiple of a duration of the first chip, or a duration of the first chip is an integer multiple of a duration of the second chip;

[0353] a ratio of a duration of the first chip to a duration of the second chip violates a coding rule of linear coding;

[0354] in a case where a duration of a last chip in the start indicator part is variable, a value of the last chip belongs to at least one of a first range and a second range;

[0355] The minimum value of the first range is the difference between the duration of the OFDM symbol and the duration of the first chip, and the maximum value of the first range is the sum of the duration of the OFDM symbol and the duration of the CP minus the duration of the first chip; the minimum value of the second range is the difference between the duration of the OFDM symbol and the second value, and the maximum value of the first range is the sum of the duration of the OFDM symbol and the duration of the CP minus the second value, the second value being the sum of the duration of the first chip and the duration of the second chip;

[0356] The duration of the last chip in the start indicator part is variable, the first chip is an on chip in the target chip, and the second chip is an off chip in the target chip; when the duration of each chip in the start indicator part is fixed, the first chip is an on chip in the start indicator part, and the second chip is an off chip in the start indicator part.

[0357] Optionally, the first information further comprises a check bit, and the check bit is located at the last N bits of the target OFDM symbol.

[0358] Optionally, the check bit satisfies at least one of the following:

[0359] The level of the chip generated by the check bit is the same as the level of the last N chips of the start indicator part;

[0360] The level of the last chip generated by the check bit is the same as the level of the first chip of the clock collection part, and the level of the last chip of the start indicator part is different from the level of the first chip of the clock collection part.

[0361] Optionally, the first information satisfies at least one of the following:

[0362] The start indicator part or the clock collection part carries reference chip information;

[0363] The clock collection part carries target indication information, and the target indication information is used to indicate second information;

[0364] The second information comprises at least one of the following: the chip duration of the target channel or the target signal or the target information; and the modulation parameter of the target channel or the target signal or the target information.

[0365] Optionally, the signal used to carry the reference chip information contains at least three edges.

[0366] Optionally, the target indication information satisfies at least one of the following:

[0367] The signal for carrying the target indication information and the signal for carrying the reference chip information use the same modulation parameter;

[0368] The signal for carrying the target indication information uses a fixed modulation parameter, and different target indication information corresponds to different time durations;

[0369] The pattern or sequence corresponding to the target indication information is fixed, and the time duration corresponding to different target indication information is determined according to the indicated second information; or the pattern or sequence corresponding to the target indication information is determined according to the indicated second information;

[0370] The target indication information is used to indicate at least one of the second information of the reader-to-device transmission channel PRDCH and the second information of the device-to-reader transmission PDRCH;

[0371] The target indication information is used to indicate at least one of the second information of the layer 1 control information and the second information of the data information.

[0372] Optionally, the second information of the PRDCH and the second information of the PDRCH are different.

[0373] Optionally, the second information of the layer 1 control information and the second information of the data information are different.

[0374] Optionally, the reference chip information carried by the clock acquisition part is used to determine the second information of the subsequent layer 1 control information.

[0375] Or, the target indication information is used to determine the second information of the subsequent data information.

[0376] Referring to FIG. 10, when the preamble-based transmission apparatus is a network-side device or a component in the network-side device, the preamble-based transmission apparatus 1000 comprises:

[0377] A receiving module 1001, configured to receive first information from a sending end, the first information comprising the preamble;

[0378] The preamble comprises a start indicator part and a clock acquisition part, the start indicator part being used to indicate a reader-to-device R2D transmission start, and the clock acquisition part being used for transmission synchronization.

[0379] Optionally, the first information satisfies at least one of the following:

[0380] A start position of the start indicator part is aligned with a boundary of an orthogonal frequency division multiplexing, OFDM, symbol or a boundary of a cyclic prefix, CP;

[0381] An end position of the start indicator part is aligned with a boundary of the OFDM symbol;

[0382] A start position of the clock acquisition part is aligned with a boundary of the OFDM symbol;

[0383] An end position of the clock acquisition part is aligned with a boundary of the OFDM symbol.

[0384] Optionally, a total duration of off chips in the start indicator part is fixed, and a total duration of on chips in the start indicator part is variable.

[0385] Alternatively, a total duration of off chips in the start indicator part is fixed.

[0386] Optionally, a duration of one off chip in the start indicator part is determined based on at least one of:

[0387] a duration of the OFDM symbol;

[0388] a duration of the CP;

[0389] a first time, the first time being a duration of the clock acquisition part;

[0390] a second time, the second time being a duration of one or more chips or off chips in the CP.

[0391] Optionally, a duration of one on chip in the start indicator part is determined based on at least one of:

[0392] a duration of the OFDM symbol;

[0393] a duration of the CP;

[0394] a duration of the off chip;

[0395] a duration of the off chip in the OFDM symbol where the on chip is located;

[0396] a duration of the preamble;

[0397] a first time, the first time being a duration of the clock acquisition part;

[0398] a total duration of off chips in the start indicator part.

[0399] Optionally, the start indicator portion satisfies any one of the following:

[0400] The duration of the last chip in the start indicator portion is variable, and the duration of the target chip other than the last chip in the start indicator portion is fixed;

[0401] The duration of each chip in the start indicator portion is fixed.

[0402] Optionally, the start indicator portion further satisfies at least one of the following:

[0403] The duration of the first chip is not equal to the candidate chip duration of the channel PRDCH transmitted from the reader to the device;

[0404] The duration of the second chip is not equal to the candidate chip duration of the PRDCH;

[0405] The duration of the second chip is equal to the first value minus the duration of the first chip, and the first value is the sum of the duration of the OFDM symbol and the duration of the CP;

[0406] The duration of the second chip is an integer multiple of the duration of the first chip, or the duration of the first chip is an integer multiple of the duration of the second chip;

[0407] The ratio of the duration of the first chip and the duration of the second chip violates the coding rule of linear coding;

[0408] In the case where the duration of the last chip in the start indicator portion is variable, the value of the last chip belongs to at least one of the first range and the second range;

[0409] Wherein, the minimum value of the first range is the difference between the duration of the OFDM symbol and the duration of the first chip, and the maximum value of the first range is the sum of the duration of the OFDM symbol and the duration of the CP minus the duration of the first chip; The minimum value of the second range is the difference between the duration of the OFDM symbol and the second value, and the maximum value of the first range is the difference between the sum of the duration of the OFDM symbol and the duration of the CP and the second value, and the second value is the sum of the duration of the first chip and the duration of the second chip;

[0410] In a case where the duration of the last chip in the start indicator part is variable, the first chip is an on chip in the target chip and the second chip is an off chip in the target chip; in a case where the duration of each chip in the start indicator part is fixed, the first chip is an on chip in the start indicator part and the second chip is an off chip in the start indicator part.

[0411] Optionally, the first information further comprises a check bit, and the check bit is located at the last N bits of the target OFDM symbol.

[0412] Optionally, the check bit satisfies at least one of the following:

[0413] The level of the last chip generated by the check bit is the same as the level of the first chip of the clock acquisition part, and the level of the last chip of the start indicator part is different from the level of the first chip of the clock acquisition part.

[0414] The level of the last chip generated by the check bit is the same as the level of the first chip of the clock acquisition part, and the level of the last chip of the start indicator part is different from the level of the first chip of the clock acquisition part.

[0415] Optionally, the first information satisfies at least one of the following:

[0416] The start indicator part or the clock acquisition part carries reference chip information;

[0417] The clock acquisition part carries target indication information, and the target indication information is used to indicate second information.

[0418] The second information comprises at least one of the following: chip duration of a target channel or a target signal or target information; modulation parameter of a target channel or a target signal or target information.

[0419] Optionally, a signal used to carry the reference chip information comprises at least three edges.

[0420] Optionally, the target indication information satisfies at least one of the following:

[0421] The signal used to carry the target indication information and the signal used to carry the reference chip information use the same modulation parameter;

[0422] The signal used to carry the target indication information uses a fixed modulation parameter, and different target indication information corresponds to different durations;

[0423] The pattern or sequence corresponding to the target indication information is fixed, and the duration corresponding to different target indication information is determined according to the indicated second information; or the pattern or sequence corresponding to the target indication information is determined according to the indicated second information.

[0424] The target indication information is used for indicating at least one of second information of a reader-to-device transmission channel PRDCH and second information of a device-to-reader transmission PDRCH.

[0425] The target indication information is used for indicating at least one of second information of layer 1 control information and second information of data information.

[0426] Optionally, the second information of the PRDCH and the second information of the PDRCH are different.

[0427] Optionally, the second information of the layer 1 control information and the second information of the data information are different.

[0428] Optionally, the reference chip information carried by the clock acquisition part is used for determining second information of subsequent layer 1 control information.

[0429] Or, the target indication information is used for determining second information of subsequent data information.

[0430] Optionally, a ratio of at least one on chip and off chip duration in the clock acquisition part violates an encoding rule of linear coding.

[0431] The preamble-based transmission device provided by the embodiments of the present application can realize each process of the method embodiments of FIGS. 2 to 8 and achieve the same technical effects. To avoid repetition, details are not described here.

[0432] As shown in FIG. 10, the embodiments of the present application further provide a communication device 1000, which comprises a processor 1001 and a memory 1002, and the memory 1002 stores programs or instructions executable on the processor 1001. When the programs or instructions are executed by the processor 1001, each step of the above preamble-based transmission method embodiments is implemented, and the same technical effects can be achieved. To avoid repetition, details are not described here.

[0433] The embodiment of the present application further provides a terminal comprising a processor and a communication interface, wherein the communication interface is coupled with the processor, and the processor is configured to run programs or instructions to implement the steps in the method embodiment shown in FIG. 2 or FIG. 8. The terminal embodiment corresponds to the terminal-side method embodiment described above, and each implementation process and implementation manner of the method embodiment described above can be applied to the terminal embodiment and achieve the same technical effects. The terminal can be the preamble-based transmission apparatus shown in FIG. 9 or FIG. 10. Specifically, FIG. 12 is a schematic diagram of the hardware structure of a terminal for implementing the embodiment of the present application.

[0434] The terminal 1200 includes, but is not limited to, at least part of components such as a radio frequency unit 1201, a network module 1202, an audio output unit 1203, an input unit 1204, a sensor 1205, a display unit 1206, a user input unit 1207, an interface unit 1208, a memory 1209, and a processor 1210.

[0435] Those skilled in the art can understand that the terminal 1200 can further include a power supply (such as a battery) for supplying power to each component, and the power supply can be logically connected with the processor 1210 through a power management system, so as to realize functions such as management of charging, discharging, and power consumption management through the power management system. The terminal structure shown in FIG. 12 does not constitute a limitation on the terminal, and the terminal can include more or fewer components than those shown, or combine certain components, or have a different arrangement of components, which will not be described here.

[0436] It should be understood that in the embodiment of the present application, the input unit 1204 can include a graphics processor 12041 and a microphone 12042, and the graphics processor 12041 processes image data of a still picture or a video obtained by an image capture device (such as a camera) in a video capture mode or an image capture mode. The display unit 1206 can include a display panel 12061, which can be configured in the form of a liquid crystal display, an organic light-emitting diode, etc. The user input unit 1207 includes at least one of a touch panel 12071 and other input devices 12072. The touch panel 12071 is also called a touch screen. The touch panel 12071 can include two parts of a touch detection device and a touch controller. The other input devices 12072 can include, but are not limited to, a physical keyboard, function keys (such as volume control keys, on-off keys, etc.), a trackball, a mouse, a joystick, etc., which will not be described here.

[0437] In the embodiment of the present application, the radio frequency unit 1201 can transmit downlink data from a network side device to the processor 1210 for processing, and can send uplink data to the network side device. Generally, the radio frequency unit 1201 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0438] The memory 1209 can be used to store software programs or instructions and various data. The memory 1209 can mainly include a first storage area storing programs or instructions and a second storage area storing data, wherein the first storage area can store an operating system, application programs or instructions required by at least one function (such as a sound playing function, an image playing function, etc.), and the like. In addition, the memory 1209 can include a volatile memory or a non-volatile memory. The non-volatile memory can be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically EPROM (EEPROM), or a flash memory. The volatile memory can be a Random Access Memory (RAM), a Static RAM (SRAM), a Dynamic RAM (DRAM), a Synchronous DRAM (SDRAM), a Double Data Rate SDRAM (DDR SDRAM), an Enhanced SDRAM (ESDRAM), a Synch link DRAM (SLDRAM), and a Direct Rambus RAM (DRRAM). The memory 1209 in the embodiments of the present application includes but is not limited to these and any other suitable types of memory.

[0439] The processor 1210 can include one or more processing units; optionally, the processor 1210 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to an operating system, a user interface, and an application program, and the modem processor mainly processes wireless communication signals, such as a baseband processor. It can be understood that the above-mentioned modem processor can also not be integrated into the processor 1210.

[0440] In the case that the terminal is a sending end, the processor 1210 is configured to generate a preamble; the radio frequency unit 1201 is configured to send first information, the first information including the preamble; wherein the preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate a reader-to-device (R2D) transmission start, and the clock acquisition part is used for transmission synchronization.

[0441] In a case that the terminal is a receiving terminal, the radio frequency unit 1201 is configured to receive first information from a sending terminal, and the first information comprises the preamble;

[0442] The preamble comprises a start indicator part and a clock acquisition part, the start indicator part is configured to indicate a start of a R2D transmission of the reader to the device, and the clock acquisition part is configured to transmit synchronization.

[0443] It can be understood that the implementation process of each implementation manner mentioned in the embodiment can refer to the related description of the above method embodiment, and achieve the same or corresponding technical effect. To avoid repetition, it will not be described here.

[0444] The embodiment of the application further provides a network side device, comprising a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run programs or instructions, and the steps of the method embodiment shown in FIG. 2 are realized. The network side device embodiment corresponds to the above-mentioned network side device method embodiment, and each implementation process and implementation manner of the above-mentioned method embodiment can be applied to the network side device embodiment, and the same technical effect can be achieved.

[0445] Specifically, the embodiment of the application further provides a network side device, which can be the preamble-based transmission apparatus shown in FIG. 9. As shown in FIG. 13, the network side device 1300 comprises an antenna 1301, a radio frequency device 1302, a baseband device 1303, a processor 1304 and a memory 1305. The antenna 1301 is connected with the radio frequency device 1302. In the uplink direction, the radio frequency device 1302 receives information through the antenna 1301, and sends the received information to the baseband device 1303 for processing. In the downlink direction, the baseband device 1303 processes the information to be sent, and sends it to the radio frequency device 1302. The radio frequency device 1302 processes the received information and sends it out through the antenna 1301.

[0446] The method performed by the network side device in the above embodiment can be implemented in the baseband device 1303, which comprises a baseband processor.

[0447] The baseband device 1303 may, for example, comprise at least one baseband board, and a plurality of chips are arranged on the baseband board, as shown in FIG. 13. One of the chips is, for example, a baseband processor, which is connected with the memory 1305 through a bus interface to call programs in the memory 1305 and perform the operations of the network side device shown in the above method embodiment.

[0448] The network side device can further comprise a network interface 1306, which is, for example, a common public radio interface (CPRI).

[0449] Specifically, the network side device 1300 in the embodiments of the present application further includes instructions or programs stored on the memory 1305 and executable on the processor 1304, the processor 1304 invokes the instructions or programs in the memory 1305 to perform the method performed by each module shown in FIG. 9 and achieve the same technical effects. To avoid repetition, details are not described herein.

[0450] The embodiments of the present application also provide a readable storage medium, the readable storage medium stores programs or instructions, the programs or instructions are executed by a processor to implement each process of the preamble-based transmission method embodiments described above, and the same technical effects can be achieved. To avoid repetition, details are not described herein.

[0451] The processor is the processor in the terminal described in the above embodiments. The readable storage medium includes a computer readable storage medium, such as a computer readable only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, etc. In some examples, the readable storage medium can be a non-transitory readable storage medium.

[0452] The embodiments of the present application further provide a chip, the chip includes a processor and a communication interface, the communication interface and the processor are coupled, the processor is used to run programs or instructions to implement each process of the preamble-based transmission method embodiments described above, and the same technical effects can be achieved. To avoid repetition, details are not described herein.

[0453] It should be understood that the chip mentioned in the embodiments of the present application can also be referred to as a system chip, a system chip, a chip system or a system on chip, etc.

[0454] The embodiments of the present application further provide a computer program / program product, the computer program / program product includes computer instructions, the computer program / program product is executed by at least one processor to implement each process of the preamble-based transmission method embodiments described above, and the same technical effects can be achieved. To avoid repetition, details are not described herein.

[0455] The embodiments of the present application further provide a wireless communication system, including: a sending end device and a receiving end device, the sending end device can be used to execute the steps of the preamble-based transmission method on the sending end side as described above, and the receiving end device can be used to execute the steps of the preamble-based transmission method on the receiving end side as described above.

[0456] It should be noted that, in the present document, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises a", "comprising", or the like does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element. Furthermore, it is to be understood that the methods and apparatuses of the present application can be carried out by specific hardware, by software, or by a combination of hardware and software. It is therefore, contemplated to this patent to cover any and all modifications, variations, or equivalents that fall within the scope of the present application. Accordingly, where a concept can have been illustrated in only one of the exemplary embodiments, various aspects of the concept can be modified and / or combined to produce a variety of other embodiments that are not specifically illustrated. Thus, for purposes of describing particular embodiments, reference has been made to orientations. However, it is to be understood that the teachings of this patent are not limited in their application to any one of the mentioned orientations, but are applicable to any assembly having the features currently described or hereinafter ascertained.

[0457] From the above description of the embodiments, it is apparent that the method of the above embodiments can be realized by means of a computer software product and general hardware platform, of course, it can also be realized by hardware. The computer software product is stored in a storage medium (such as ROM, RAM, magnetic disc, optical disc, etc.), and includes a plurality of instructions for making the terminal or network side device execute the method described in each embodiment of the present application.

[0458] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, and the above specific embodiments are only illustrative, but not restrictive. Those skilled in the art can make many forms of embodiments under the inspiration of the present application without departing from the scope of the present application and the protection scope of the claims, and these embodiments all belong to the protection scope of the present application.

Claims

1. A preamble-based transmission method, comprising: generating, by a transmitter, a preamble; transmitting, by the transmitter, first information, the first information comprising the preamble; wherein the preamble comprises a start indicator part and a clock acquisition part, the start indicator part is used to indicate a reader-to-device (R2D) transmission start, and the clock acquisition part is used for transmission synchronization.

2. The method of claim 1, wherein, The first information satisfies at least one of the following: a start position of the start indicator part is aligned with a boundary of an orthogonal frequency division multiplexing (OFDM) symbol or a boundary of a cyclic prefix (CP) ; an end position of the start indicator part is aligned with a boundary of an OFDM symbol; a start position of the clock acquisition part is aligned with a boundary of an OFDM symbol; an end position of the clock acquisition part is aligned with a boundary of an OFDM symbol.

3. The method of claim 1 or 2, wherein, a total duration of off-chips in the start indicator part is fixed, and a total duration of on-chips in the start indicator part is variable; alternatively, a total duration of off-chips in the start indicator part is fixed.

4. The method of claim 3, wherein, a duration of an off-chip in the start indicator part is determined based on at least one of the following: a duration of an OFDM symbol; a duration of a CP; a first time, the first time being a duration of the clock acquisition part; a second time, the second time being a duration of one or more chips or off-chips in a CP.

5. The method of claim 3, wherein, a duration of an on-chip in the start indicator part is determined based on at least one of the following: a duration of an OFDM symbol; a duration of a CP; a duration of an off-chip; a duration of an off-chip in an OFDM symbol where the on-chip is located; a duration of the preamble; a first time, the first time being a duration of the clock acquisition part; a total duration of off-chips in the start indicator part.

6. The method of claim 1 or 2, wherein, The start indicator part satisfies any one of the following: a duration of a last chip in the start indicator part is variable, and a duration of a target chip in the start indicator part other than the last chip is fixed; a duration of each chip in the start indicator part is fixed.

7. The method of claim 6, wherein, The start indicator part further satisfies at least one of the following: a duration of a first chip is not equal to a candidate chip duration of a PRDCH of a R2D channel; a duration of a second chip is not equal to a candidate chip duration of the PRDCH; a duration of the second chip is equal to a first value minus a duration of the first chip, the first value being a sum of a duration of an OFDM symbol and a duration of a CP; a duration of the second chip is an integer multiple of a duration of the first chip, or a duration of the first chip is an integer multiple of a duration of the second chip; a ratio of a duration of the first chip to a duration of the second chip violates a coding rule of a linear code. In a case that the duration of the last chip in the start indicator part is variable, the value of the last chip belongs to at least one of a first range and a second range; wherein the minimum value of the first range is the difference between the duration of the OFDM symbol and the duration of the first chip, and the maximum value of the first range is the sum of the duration of the OFDM symbol and the duration of the CP minus the duration of the first chip; the minimum value of the second range is the difference between the duration of the OFDM symbol and a second value, and the maximum value of the first range is the difference between the sum of the duration of the OFDM symbol and the duration of the CP and the second value, the second value being the sum of the duration of the first chip and the duration of the second chip; wherein, in a case that the duration of the last chip in the start indicator part is variable, the first chip is an on chip in the target chip and the second chip is an off chip in the target chip; in a case that the duration of each chip in the start indicator part is fixed, the first chip is an on chip in the start indicator part and the second chip is an off chip in the start indicator part.

8. The method of claim 1, 2, 6, or 7, wherein, The first information further comprises a check bit, and the check bit is located at the last N bits of the target OFDM symbol.

9. The method of claim 8, wherein, The check bit satisfies at least one of the following conditions: the level of the chip generated by the check bit is the same as the level of the last N chips of the start indicator part; the level of the last chip generated by the check bit is the same as the level of the first chip of the clock acquisition part, and the level of the last chip of the start indicator part is different from the level of the first chip of the clock acquisition part.

10. The method according to any one of claims 1 to 9, wherein, The first information satisfies at least one of the following conditions: the start indicator part or the clock acquisition part carries reference chip information; the clock acquisition part carries target indication information, and the target indication information is used to indicate second information; wherein the second information comprises at least one of the following: chip duration of a target channel or a target signal or target information; modulation parameter of a target channel or a target signal or target information.

11. The method of claim 10, wherein, The signal used to carry the reference chip information comprises at least three edges.

12. The method of claim 10, wherein, The target indication information satisfies at least one of the following conditions: the signal used to carry the target indication information and the signal used to carry the reference chip information use the same modulation parameter; the signal used to carry the target indication information uses a fixed modulation parameter, and different target indication information corresponds to different durations; the pattern or sequence corresponding to the target indication information is fixed, and different target indication information corresponds to different durations according to the indicated second information; or the pattern or sequence corresponding to the target indication information is determined according to the indicated second information; The target indication information is used to indicate at least one of second information of a reader-to-device transmission channel (PRDCH) and second information carried by a device-to-reader transmission (PDRCH); The target indication information is used to indicate at least one of second information of layer 1 control information and second information of data information.

13. The method of claim 12, wherein, The second information of the PRDCH and the second information of the PDRCH are different.

14. The method of claim 12, wherein, The second information of the layer 1 control information and the second information of the data information are different.

15. The method of claim 12, wherein, The reference chip information carried by the clock acquisition part is used to determine the second information of subsequent layer 1 control information. Alternatively, the target indication information is used to determine the second information of subsequent data information.

16. The method according to any one of claims 1 to 14, wherein, At least one ratio of a duration of on chip to a duration of off chip in the clock acquisition part violates a coding rule of linear coding.

17. A preamble-based transmission method, comprising: a receiving end receiving first information from a sending end, the first information comprising the preamble; wherein the preamble comprises a start indicator part and a clock acquisition part, the start indicator part being used to indicate a start of a reader-to-device (R2D) transmission, and the clock acquisition part being used to transmit synchronization.

18. The method of claim 17, wherein, The first information satisfies at least one of the following: a start position of the start indicator part is aligned with a boundary of an orthogonal frequency division multiplexing (OFDM) symbol or a boundary of a cyclic prefix (CP); an end position of the start indicator part is aligned with a boundary of the OFDM symbol; a start position of the clock acquisition part is aligned with a boundary of the OFDM symbol; an end position of the clock acquisition part is aligned with a boundary of the OFDM symbol.

19. The method of claim 17 or 18, wherein, A total duration of off chip in the start indicator part is fixed. A total duration of off chip in the start indicator part is fixed.

20. The method of claim 19, wherein, A duration of one off chip in the start indicator part is determined based on at least one of the following: a duration of the OFDM symbol; a duration of the CP; a first time, the first time being a duration of the clock acquisition part; a second time, the second time being a duration of one or more chips or off chips in the CP.

21. The method of claim 19, wherein, A duration of one on chip in the start indicator part is determined based on at least one of the following: a duration of the OFDM symbol; a duration of the CP; a duration of off chip; a duration of off chip in the OFDM symbol in which the on chip is located; a duration of the preamble; a first time, the first time being a duration of the clock acquisition part; a total duration of off chip in the start indicator part.

22. The method of claim 17 or 18, wherein, The start indicator part satisfies any one of the following: a duration of a last chip in the start indicator part is variable, and a duration of a target chip other than the last chip in the start indicator part is fixed. The duration of each chip in the start indicator part is fixed.

23. The method of claim 22, wherein, The start indicator part further satisfies at least one of the following: The duration of the first chip is not equal to the candidate chip duration of the channel PRDCH transmitted from the reader to the device; The duration of the second chip is not equal to the candidate chip duration of the PRDCH; The duration of the second chip is equal to the first value minus the duration of the first chip, and the first value is the sum of the duration of the OFDM symbol and the duration of the CP; The duration of the second chip is an integer multiple of the duration of the first chip, or the duration of the first chip is an integer multiple of the duration of the second chip; The ratio of the duration of the first chip to the duration of the second chip violates the coding rule of linear coding; In the case that the duration of the last chip in the start indicator part is variable, the value of the last chip belongs to at least one of the first range and the second range; The minimum value of the first range is the difference between the duration of the OFDM symbol and the duration of the first chip, and the maximum value of the first range is the sum of the duration of the OFDM symbol and the duration of the CP minus the duration of the first chip; the minimum value of the second range is the difference between the duration of the OFDM symbol and the second value, and the maximum value of the first range is the difference between the sum of the duration of the OFDM symbol and the duration of the CP and the second value, and the second value is the sum of the duration of the first chip and the duration of the second chip; In the case that the duration of the last chip in the start indicator part is variable, the first chip is the on chip in the target chip, and the second chip is the off chip in the target chip; in the case that the duration of each chip in the start indicator part is fixed, the first chip is the on chip in the start indicator part, and the second chip is the off chip in the start indicator part.

24. The method of claim 17, 18, 22, or 23, wherein, The first information further includes a check bit, and the check bit is located at the last N bits of the target OFDM symbol.

25. The method of claim 24, wherein, The check bit satisfies at least one of the following: The level of the chip generated by the check bit is the same as the level of the last N chips of the start indicator part; The level of the last chip generated by the check bit is the same as the level of the first chip of the clock acquisition part, and the level of the last chip of the start indicator part is different from the level of the first chip of the clock acquisition part.

26. The method of any one of claims 17 to 25, wherein, The first information satisfies at least one of the following: The start indicator part or the clock acquisition part carries reference chip information; The clock acquisition part carries target indication information, and the target indication information is used to indicate the second information; The second information includes at least one of the following: a chip duration of the target channel or target signal or target information; and a modulation parameter of the target channel or target signal or target information.

27. The method of claim 26, wherein, The signal used to carry the reference chip information includes at least three edges.

28. The method of claim 27, wherein, The target indication information satisfies at least one of the following: The signal used to carry the target indication information and the signal used to carry the reference chip information use the same modulation parameter; The signal used to carry the target indication information uses a fixed modulation parameter, and different target indication information corresponds to different durations; The pattern or sequence corresponding to the target indication information is fixed, and the duration corresponding to different target indication information is determined according to the indicated second information; or the pattern or sequence corresponding to the target indication information is determined according to the indicated second information; The target indication information is used to indicate at least one of the following: second information of a reader-to-device transmission channel PRDCH and second information of a device-to-reader transmission PDRCH; The target indication information is used to indicate at least one of the following: second information of layer 1 control information and second information of data information.

29. The method of claim 28, wherein, The second information of the PRDCH and the second information of the PDRCH are different.

30. The method of claim 28, wherein, The second information of the layer 1 control information and the second information of the data information are different.

31. The method of claim 28, wherein, The reference chip information carried by the clock acquisition part is used to determine the second information of the subsequent layer 1 control information; Or, the target indication information is used to determine the second information of the subsequent data information.

32. The method of any one of claims 17 to 31, wherein, At least one ratio of the duration of on chip and off chip in the clock acquisition part violates the encoding rule of linear coding.

33. A preamble-based transmission apparatus, comprising: a processing module configured to generate a preamble; a sending module configured to send first information, the first information including the preamble; The preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate the start of a reader-to-device R2D transmission, and the clock acquisition part is used for transmission synchronization.

34. The apparatus of claim 33, wherein, The first information satisfies at least one of the following: The start position of the start indicator part is aligned with the boundary of an orthogonal frequency division multiplexing OFDM symbol or the boundary of a cyclic prefix CP; The end position of the start indicator part is aligned with the boundary of an OFDM symbol; The start position of the clock acquisition part is aligned with the boundary of an OFDM symbol; The end position of the clock acquisition part is aligned with the boundary of an OFDM symbol.

35. A preamble-based transmission apparatus, comprising: a receiving module configured to receive first information from a sending end, the first information including a preamble; The preamble includes a start indicator part and a clock acquisition part, the start indicator part is used to indicate the start of a reader-to-device R2D transmission, and the clock acquisition part is used for transmission synchronization.

36. The apparatus of claim 35, wherein, The first information satisfies at least one of the following: The start position of the start indicator part is aligned with the boundary of an orthogonal frequency division multiplexing OFDM symbol or the boundary of a cyclic prefix CP; an end position of the start indicator part is aligned with a boundary of an OFDM symbol; a start position of the clock acquisition part is aligned with a boundary of an OFDM symbol; an end position of the clock acquisition part is aligned with a boundary of an OFDM symbol.

37. A terminal comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implement the steps of the preamble-based transmission method according to any one of claims 1 to 32.

38. A network-side device comprising a processor and a memory, the memory storing programs or instructions executable on the processor, the programs or instructions, when executed by the processor, implement the steps of the preamble-based transmission method according to any one of claims 1 to 16.

39. A readable storage medium, the readable storage medium storing programs or instructions, the programs or instructions, when executed by a processor, implement the steps of the preamble-based transmission method according to any one of claims 1 to 32.

40. A computer program product comprising computer instructions, the computer instructions, when executed by a processor, implement the steps of the preamble-based transmission method according to any one of claims 1 to 32.

Images