Device authorization method and apparatus, and device, medium and product

Abstract

The present application relates to the field of communications. Disclosed are a device authorization method and apparatus, and a device, a medium and a product. The method comprises: sending a D2R authorization, wherein the D2R authorization is used for scheduling an A-IoT device to send a PDRCH. In the method provided in the present application, a reader sends a D2R authorization to an A-IoT device to schedule PDRCH sending, such that the reader can schedule subsequent PDRCH sending on the basis of a detected PDRCH sending status of a current A-IoT device. For example, when an A-IoT device is sending a PDRCH, the end time of a current PDRCH is determined to select an appropriate time-domain resource and / or frequency-domain resource for subsequent PDRCH sending, and a D2R grant can be sent to a terminal device in advance, thereby improving resource utilization and reducing latency.

Description

Device authorization method, apparatus, device, medium and product TECHNICAL FIELD

[0001] The present application relates to the field of communication, in particular to a device authorization method, apparatus, device, medium and product. BACKGROUND

[0002] In an Ambient Power Enabled Internet of Things (A-IoT), devices are required to be scheduled by a reader to perform Device to Reader (D2R) transmission, but how to schedule D2R is a problem that has not been solved.

[0003] SUMMARY

[0004] Embodiments of the present application provide a device authorization method, apparatus, device, medium and product, and the technical solutions are as follows:

[0005] According to an aspect of the present application, a device authorization method is provided, the method is performed by a reader, and the method comprises:

[0006] sending a D2R authorization, the D2R authorization being used to schedule an A-IoT device to transmit a PDRCH.

[0007] According to an aspect of the present application, a device authorization method is provided, the method is performed by an A-IoT device, and the method comprises:

[0008] receiving a D2R authorization, the D2R authorization being used to schedule an A-IoT device to transmit a PDRCH.

[0009] According to an aspect of the present application, a device authorization apparatus is provided, and the apparatus comprises:

[0010] a sending module, configured to send a D2R authorization, the D2R authorization being used to schedule an A-IoT device to transmit a PDRCH.

[0011] According to an aspect of the present application, a device authorization apparatus is provided, and the apparatus comprises:

[0012] a receiving module, configured to receive a D2R authorization, the D2R authorization being used to schedule an A-IoT device to transmit a PDRCH.

[0013] According to an aspect of the present application, a communication device is provided, and the communication device comprises: a transceiver; the communication device is configured to perform a device authorization method.

[0014] According to an aspect of the present application, an A-IoT device is provided, the A-IoT device comprising: a transceiver; the A-IoT device is configured to perform a device authorization method.

[0015] According to an aspect of the present application, a communication device is provided, the communication device comprising: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement a device authorization method.

[0016] According to an aspect of the present application, a computer readable storage medium is provided, the computer readable storage medium storing at least one program, the at least one program being loaded and executed by a processor to implement a device authorization method.

[0017] According to an aspect of the present application, a computer program product or a computer program is provided, the computer program product or the computer program comprising computer instructions stored in a computer readable storage medium, the computer instructions being acquired by a processor from the computer readable storage medium, the processor executing the computer instructions to implement a device authorization method.

[0018] According to an aspect of the present application, a chip is provided, the chip comprising a programmable logic circuit and / or at least one program, the chip being configured to implement a device authorization method based on the programmable logic circuit and / or the at least one program.

[0019] The technical solutions provided by the embodiments of the present application have at least the following beneficial effects:

[0020] The reader sends a D2R authorization to the A-IoT device to schedule the sending of the PDRCH, so that the reader can schedule the sending of the next PDRCH based on the detected current PDRCH sending situation of the A-IoT device. For example, when the A-IoT device is sending the PDRCH, the end time of the current PDRCH is judged to select appropriate time domain resources and / or frequency domain resources for the next PDRCH sending, and the D2R authorization can be sent to the terminal device in advance, so as to improve the utilization rate of resources and reduce the time delay. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] FIG. 1 shows a schematic diagram of an environment energy internet of things system according to an example embodiment of the present application;

[0023] FIG. 2 shows a schematic diagram of radio frequency energy harvesting according to an example embodiment of the present application;

[0024] FIG. 3 shows a schematic diagram of backscatter communication according to an example embodiment of the present application;

[0025] FIG. 4 shows a schematic diagram of resistive load modulation according to an example embodiment of the present application;

[0026] FIG. 5 shows a schematic diagram of a topology according to an example embodiment of the present application;

[0027] FIG. 6 shows a schematic diagram of a topology according to an example embodiment of the present application;

[0028] FIG. 7 shows a flowchart of a device authorization method according to an example embodiment of the present application;

[0029] FIG. 8 shows a flowchart of a device authorization method according to an example embodiment of the present application;

[0030] FIG. 9 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0031] FIG. 10 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0032] FIG. 11 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0033] FIG. 12 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0034] FIG. 13 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0035] FIG. 14 shows a flowchart of a device authorization method according to an example embodiment of the present application;

[0036] FIG. 15 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0037] FIG. 16 shows a flowchart of a device authorization method according to an example embodiment of the present application;

[0038] FIG. 17 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0039] FIG. 18 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0040] FIG. 19 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0041] FIG. 20 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0042] FIG. 21 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0043] FIG. 22 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0044] FIG. 23 shows a schematic diagram of a device authorization method according to an example embodiment of the present application;

[0045] FIG. 24 shows a structural block diagram of a device authorization apparatus according to an example embodiment of the present application;

[0046] FIG. 25 shows a structural block diagram of a device authorization apparatus according to an example embodiment of the present application;

[0047] FIG. 26 shows a structural diagram of a communication device according to an example embodiment of the present application;

[0048] FIG. 27 shows a structural diagram of a communication device according to an example embodiment of the present application. DETAILED DESCRIPTION

[0049] For the purpose of making the objects, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application in conjunction with the drawings. The example embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following example embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0050] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting thereof. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or", as used herein, refer to and encompass any or all possible combinations of one or more of the associated listed items. It will be understood that, although the terms first, second, third, etc. can be used herein to describe various information, these terms are not intended to denote a temporal sequence. These terms are simply used to distinguish one piece of information from another. For example, a first piece of information can also be referred to as a second piece of information without departing from the scope of this disclosure. Similarly, a second piece of information can also be referred to as a first piece of information without departing from the scope of this disclosure. Depending on the context, the word "if' as used herein can be interpreted to mean "when" or "in response to determining" As used in this specification, the expression of a Boolean value is expressed as "0" for a "first meaning" and "1" for a "second meaning", without loss of generality, one skilled in the art will understand that the representative meaning can be reversed, i.e., "1" for a "first meaning" and "0" for a "second meaning".

[0051] The key technologies of Ambient Power Enabled Internet of Things (Ambient Power Enabled IoT) communication mainly include energy harvesting and back scattering communication technologies. Ambient Power Enabled Internet of Things can also be referred to as Ambient Internet of Things (Ambient IoT) or Passive Internet of Things (Passive IoT), abbreviated as AMP IoT or Ambient IoT or A-IoT. The terminal device using Ambient Power Enabled Internet of Things communication technology can be referred to as A-IoT device or AMP IoT device or Ambient IoT device.

[0052] The so-called A-IoT device refers to an IoT device that uses various ambient energy (such as wireless radio frequency energy, light energy, solar energy, thermal energy, kinetic energy, mechanical energy, etc.) to drive itself. The A-IoT device can have no energy storage capability, or can have very limited energy storage capability, such as using a capacitor with a capacity of tens of microfarads (μF). Compared with conventional IoT devices, the A-IoT device has many advantages such as no conventional battery, no maintenance, small size, low complexity and low cost, long service life, etc.

[0053] Figure 1 shows an ambient energy Internet of Things (A-IoT) system 100 according to an example embodiment of the present application, which includes a network device 110 and an A-IoT device 120. The network device 110 is configured to transmit wireless energizing signals and / or downlink communication signals to the A-IoT device 120, and to receive backscattered signals from the A-IoT device 120 and / or signals actively transmitted by the A-IoT device 120.

[0054] The network device 110 supports wireless communication functions, including but not limited to: a base station (BS), a node B (NB), an evolved node B (eNB), a next generation node B (gNB), a radio network controller (RNC), a base station controller (BSC), a base transceiver station (BTS), a home evolved node B or home node B (HNB), a baseband unit (BBU), a remote radio unit (RRU), a distributed unit (DU), a wireless relay node, a wireless backhaul node, a transmission point (TP), a transmission and reception point (TRP), an antenna panel, a router, etc.

[0055] In the present application, for the sake of description, the downlink transmission and uplink transmission are distinguished from the perspective of the A-IoT device 120. The signals transmitted by the A-IoT device 120 are referred to as uplink signals, and the data transmitted by the A-IoT device 120 are referred to as uplink data. The signals transmitted to the A-IoT device 120 are referred to as downlink signals, and the data transmitted to the A-IoT device 120 are referred to as downlink data. Furthermore, the uplink signals / uplink data can be actively transmitted by the A-IoT device 120, or backscattered by the A-IoT device 120 according to an external carrier.

[0056] The A-IoT device 120 includes an energy harvesting module 221. Optionally, in addition to the energy harvesting module 221, the A-IoT device 120 also includes one or more of a backscatter communication module 222, a low-power computing module 223, a sensor module 224, and a memory (not shown in the figure). It should be understood that the modules included in the A-IoT device 120 shown in FIG. 1 are only an example and are not limiting. For example, the energy harvesting module 221 can harvest environmental energy such as radio frequency energy, light energy, kinetic energy, mechanical energy, solar energy, radiation energy, etc., thereby providing energy for various modules of the A-IoT device 120. If the environmental energy harvested by the A-IoT device 120 is radio frequency energy, the signal used to provide the radio frequency energy can be referred to as an energy-providing signal.

[0057] In some embodiments, the harvesting of radio frequency energy is based on wireless radio frequency signals in the environment, that is, the energy-providing signal is a wireless radio frequency signal in the environment. The wireless radio frequency signal in the environment includes, for example, radio frequency signals of other communication systems, broadcast signals, etc. At this time, the energy harvesting of the A-IoT device 120 can be considered passive. The other communication systems refer to communication systems that do not include the A-IoT device. At this time, the energy-providing signal can use a physical layer technology supported by the other communication systems, for example, the energy-providing signal is an Orthogonal Frequency Division Multiplexing (OFDM) signal.

[0058] In some embodiments, the harvesting of radio frequency energy is based on in-band wireless radio frequency signals, that is, the energy-providing signal is an in-band wireless radio frequency signal. The in-band wireless radio frequency signal includes, for example, signals transmitted using time-frequency resources within a communication system that includes the A-IoT device. Such an energy-providing signal helps to ensure energy harvesting efficiency and reliability. At this time, the energy-providing signal can use a physical layer technology supported by the A-IoT device 120, for example, the energy-providing signal is a simple waveform obtained by simple modulation.

[0059] After the A-IoT device 120 obtains energy, it can receive signals from the network device 110 through a receiver, reflect signals to the network device 110 through the backscatter communication module 222, or transmit signals to the network device 110 through a transmitter (not shown in the figure). The data reflected or transmitted by the A-IoT device 120 can be data stored by itself (such as an identity or pre-written information, such as the production date, brand, and manufacturer of a product, etc.). The sensor module 224 can include various sensors, and the A-IoT device 120 can report data collected by the various sensors based on a low-power mechanism. The memory is used to store some basic information (such as an article identifier, etc.) or to obtain environmental temperature, environmental humidity, and other sensor data. Optionally, the sensor module 224 and the memory can be implemented as one module.

[0060] The A-IoT device 120 can employ a low-power computing module 223 to implement simple signal demodulation, decoding or encoding, modulation, and the like simple operation, and the hardware design can be very simple, so that the A-IoT device 120 has very low cost and very small size.

[0061] FIG. 2 shows a schematic diagram of radio frequency power harvesting by the energy harvesting module 221. Radio frequency power harvesting is based on the principle of electromagnetic induction, and uses a radio frequency module RF to perform electromagnetic induction and is connected with a capacitor C and a load resistor RL in parallel, to achieve the collection of spatial electromagnetic wave energy and obtain the energy required to drive the A-IoT device to work, such as: for driving a low-power demodulation module, a modulation module, a sensor, and a memory reading, etc. Based on this, the A-IoT device achieves the effect of not needing a traditional battery.

[0062] In backscatter communication, the backscatter signal can be modulated or not modulated. FIG. 3 shows a schematic diagram of modulated backscatter communication. The transmit (TX) module 211 of the network device 110 transmits a wireless signal carrier 231 using an amplifier (AMP) 212, and the A-IoT device 120 receives and modulates the wireless signal carrier 231, loads the information to be transmitted using the low-power computing module 223, and collects radio frequency energy using the energy harvesting module 221. The A-IoT device 120 radiates the modulated reflected signal 232 using the antenna 216, and this information transmission process is called backscatter communication. The receive (RX) module 213 of the network device 110 receives the modulated reflected signal 232 using a low-noise amplifier (LNA) 214. Backscatter and load modulation are inseparable. Load modulation adjusts and controls the circuit parameters of the oscillation loop of the A-IoT device 120 according to the beat of the data stream, so that the size and other parameters of the impedance of the A-IoT device 120 change, and the modulation process is completed.

[0063] The load modulation technology mainly includes resistance load modulation and capacitance load modulation. FIG. 4 shows a schematic diagram of resistance load modulation. In resistance load modulation, the load resistor R L The third resistor R3 is connected in parallel, and the switch S based on binary coding control is turned on or off, and the on-off of the third resistor R3 will cause the voltage on the circuit to change, and the load resistor R L The first capacitor C1 is connected in parallel, and the load resistor R LThe second resistor R2 is in series with the first resistor R1, and the first resistor R1 is in series with the first inductor L1. The first inductor L1 is coupled with the second inductor L2, and the second inductor L2 is in series with the second capacitor C2. In an example, ASK modulation can be implemented, i.e., the amplitude of the backscattering signal of the terminal device is adjusted to modulate and transmit the signal. Similarly, in the capacitor load modulation, the on-off of the capacitor can change the resonant frequency of the circuit to realize FSK modulation, i.e., the working frequency of the backscattering signal of the terminal device is adjusted to modulate and transmit the signal. It can be seen that the A-IoT device 120 can modulate the incoming signal by means of load modulation.

[0064] Therefore, the A-IoT device has the following advantages: (1) it does not actively transmit signals, and thus does not need a complex radio frequency link, such as a power amplifier (PA) and a radio frequency filter; (2) it does not need to actively generate high-frequency signals, and thus does not need a high-frequency crystal oscillator; and (3) by means of backscattering communication, the signal transmission does not consume its own energy.

[0065] The A-IoT device has many advantages, and thus can be widely applied in various industries, such as logistics, object identification, intelligent warehousing, smart agriculture, energy and power, industrial internet, smart wearable, smart home, smart control, environmental monitoring, positioning, and the like.

[0066] Specifically, from the perspective of energy sources and usage, the A-IoT device can be divided into the following three categories.

[0067] (1) Passive A-IoT device: Passive A-IoT device does not need to install a battery. When the passive A-IoT device approaches the network device (such as the reader of the RFID system), the passive A-IoT device is in the near field range formed by the antenna radiation of the network device. Therefore, the passive A-IoT device antenna generates an induced current through electromagnetic induction, and the induced current drives the low-power chip circuit of the passive A-IoT device. The work of demodulating the forward link signal (that is, the downlink, the link from the network device to the A-IoT device) and modulating the signal of the backward link (that is, the uplink, the link from the A-IoT device to the network device) is realized. For the backscatter link, the passive A-IoT device uses the backscatter communication mode for signal transmission. It can be seen that whether it is a forward link or a backward link, the passive A-IoT device does not need to install a battery to drive it, which is a truly A-IoT device. The passive A-IoT device does not need a battery, and the radio frequency circuit and the baseband circuit are very simple, for example, it does not need LNA, PA, crystal oscillator, analog to digital converter (ADC) and other devices, so it has many advantages such as small size, light weight, very cheap price and long service life.

[0068] (2) Semi-passive A-IoT device: The semi-passive A-IoT device itself does not install a conventional battery, but can use a radio frequency energy harvesting module to harvest radio wave energy, or use a solar energy / light energy / thermal energy / kinetic energy / mechanical energy harvesting module to harvest energy, and store the harvested energy in an energy storage unit (such as a capacitor). After the energy storage unit obtains energy, it can drive the low-power chip circuit of the semi-passive A-IoT device. The work of demodulating the forward link signal and modulating the signal of the backward link is realized. For the backscatter link, the semi-passive A-IoT device uses the backscatter communication mode for signal transmission. It can be seen that whether it is a forward link or a backward link, the semi-passive A-IoT device does not need to install a battery to drive it, although it uses the energy stored in the capacitor in the work, but the energy comes from the energy harvested by the energy harvesting module, so it is also a truly A-IoT device. The semi-passive A-IoT device inherits many advantages of the passive A-IoT device, so it has many advantages such as small size, light weight, very cheap price and long service life.

[0069] (3) Active A-IoT device: In some scenarios, active A-IoT devices can also be used, which can be built-in with a battery (conventional battery, such as dry battery, rechargeable lithium battery, etc.). The battery is used to drive the low-power chip circuit of the active A-IoT device. The work of demodulating the forward link signal and modulating the backward link signal is realized. For the backscatter link, the active A-IoT device uses the backscatter communication mode for signal transmission. Therefore, the zero power consumption of the active A-IoT device mainly reflects that the signal transmission of the backward link does not require the power of the device itself, but uses the backscatter mode. Although the active A-IoT device uses a battery, due to the use of ultra-low power communication technology, the power consumption is very low, so the working life of the battery can be greatly improved compared with the prior art. The active A-IoT device is powered by the built-in battery to increase the communication distance and improve the reliability of communication. Therefore, it can be applied in some scenarios with relatively high requirements for communication distance, reading delay, etc.

[0070] The A-IoT devices discussed in the related research project mainly include the following three types:

[0071] Device type 1: with a peak power consumption of several micro-watts (~1 μW), with energy storage capability, the initial sampling frequency offset (SFO) can reach 10 x ppm (Parts Per Million), without downlink amplifier and uplink amplifier, and performs uplink transmission through backscatter of external carrier wave.

[0072] Device type 2a: with a peak power consumption of less than or equal to several hundred micro-watts (≤a few hundred μW), with energy storage capability, the SFO can reach 10 x ppm, with downlink amplifier and / or uplink amplifier, and performs uplink transmission through backscatter of external carrier wave.

[0073] Device type 2b: with a peak power consumption of less than or equal to several hundred micro-watts, with energy storage capability, the SFO can reach 10 x ppm, with downlink amplifier and / or uplink amplifier, and performs uplink transmission through internal generation (Generated Internally), which can also be called active transmission based.

[0074] The cellular Internet of Things (IoT) is booming, and the 3rd Generation Partnership Project (3GPP) has standardized some IoT technologies, but there are still many IoT communication needs in various scenarios that have not been met, such as: severe communication environment (high temperature, extremely low temperature, high humidity, high pressure, high radiation or high speed movement, etc.), extremely small size terminal form requirement, extremely low cost, etc. Therefore, in order to cover these unmet IoT communication needs, ultra-low cost, extremely small size, battery-free / maintenance-free IoT in cellular networks is needed, and A-IoT can meet this demand.

[0075] Based on the discussion of A-IoT application scenarios in the 3GPP system architecture (SA), A-IoT can be used in at least four scenarios: 1. Object identification, such as logistics, production line product management, and supply chain management. 2. Environmental monitoring, such as temperature, humidity, and harmful gas monitoring in working and natural environments. 3. Positioning, such as indoor positioning, intelligent object search, and production line object positioning. 4. Intelligent control, such as intelligent control of various appliances in smart homes (turning on / off air conditioners, adjusting temperature) and intelligent control of various facilities in agricultural greenhouses (automatic irrigation, fertilization).

[0076] In the low-power IoT based on a cellular network, A-IoT devices can transmit and receive A-IoT control / data / signals from a reader, which can be a network device or an intermediate node (Intermediate Node), as shown in the topology structures of FIGS. 5 and 6. If the A-IoT device transmits A-IoT control / data / signals to the reader through backscattering, an external carrier needs to be provided for the A-IoT device, and the node providing the carrier can be the reader or another node other than the reader. In addition, the A-IoT device can also transmit A-IoT control / data / signals to the reader through active transmission.

[0077] In FIGS. 5 and 6, the transmission of A-IoT is based on network device scheduling. As shown in FIG. 5, the network device directly communicates with the A-IoT device in both directions, so the network device can directly send scheduling information to the A-IoT device. As shown in FIG. 6, the A-IoT device communicates with the network device through an intermediate node in both directions, so the network device first sends scheduling information to the intermediate node, and then the intermediate node sends the scheduling information to the A-IoT device.

[0078] The transmission from the reader to the A-IoT device is referred to as Reader to Device (R2D) transmission, or downlink transmission. The transmission from the device to the reader is referred to as Device to Reader (D2R) transmission, or uplink transmission.

[0079] FIG. 7 shows a flowchart of a device authorization method according to an example embodiment of the present application. The method is performed by a reader. The method comprises:

[0080] Step 210: transmitting a D2R grant, the D2R grant being used to schedule the A-IoT device to transmit a PDRCH (Physical Device to Reader Channel).

[0081] The D2R grant can also be referred to as control information. The D2R grant is used to schedule the A-IoT device to transmit a PDRCH, i.e., the D2R grant indicates at least time domain resources and / or frequency domain resources of the scheduled PDRCH, or it can also be understood that the D2R grant is used to indicate time domain resources and / or frequency domain resources of a next PDRCH to the A-IoT device.

[0082] In some embodiments, the A-IoT device transmits the PDRCH based on the D2R grant, or the A-IoT device transmits the PDRCH based on the time domain resources and / or the frequency domain resources indicated in the D2R grant, or the D2R grant is used to indicate time domain resources and / or frequency domain resources of multiple PDRCHs to the A-IoT device. For example, the A-IoT device transmits the PDRCH according to the D2R grant on the time-frequency resources (i.e., time domain resources and frequency domain resources) indicated by the D2R grant, wherein the PDRCH is transmitted between [T R2D_min , T R2D_max ], or if the time interval T R2D of the PDRCH is indicated in the D2R grant, the PDRCH is transmitted after T R2D , wherein T R2D ≥ T R2D_min . T R2D_min is the minimum time interval of the PDRCH, and T R2D_max is the maximum time interval of the PDRCH. Wherein the PDRCH is transmitted between [T R2D_min , T R2D_max ], means that the A-IoT device transmits the PDRCH after a first time interval after receiving the PDRCH, the first time interval is greater than the minimum time interval and less than the maximum time interval, or the first time interval is equal to the minimum time interval, or the first time interval is equal to the maximum time interval. The minimum time interval T R2D_min and the maximum time interval T R2D_maxIt can be agreed by the protocol, pre-configured by the reader, or indicated by the reader in the D2R authorization.

[0083] The reader includes a network device and / or an intermediate node. The network device can be the network device 110 shown in FIG. 1, or the network device shown in FIG. 5, or the network device shown in FIG. 6. The intermediate node includes at least one of a relay, an integrated access backhaul (IAB) node, a user equipment (UE), a repeater, and the like. The intermediate node can be the intermediate node shown in FIG. 6.

[0084] In summary, the method provided by the embodiments of the present application sends the D2R authorization to the A-IoT device to schedule the sending of the PDRCH, so that the reader can schedule the sending of the next PDRCH based on the detected current PDRCH sending situation of the A-IoT device. For example, when the A-IoT device is sending the PDRCH, the appropriate time domain resource and / or frequency domain resource for the next PDRCH sending is selected by judging the end time of the current PDRCH, and the D2R authorization can be sent to the terminal device in advance, thereby improving the utilization rate of resources and reducing the latency.

[0085] FIG. 8 shows a flowchart of a device authorization method provided by an example embodiment of the present application. The method is performed by an A-IoT device, and the method includes:

[0086] Step 310: receiving a D2R authorization, the D2R authorization being used to schedule the A-IoT device to send a PDRCH.

[0087] The D2R authorization can also be referred to as control information. The D2R authorization is used to schedule the A-IoT device to send the PDRCH, that is, the D2R authorization at least indicates the time domain resource and / or frequency domain resource of the scheduled PDRCH. It can also be understood that the D2R authorization is used to indicate the time domain resource and / or frequency domain resource of the next PDRCH to the A-IoT device, or the D2R authorization is used to indicate the time domain resource and / or frequency domain resource of multiple PDRCHs to the A-IoT device.

[0088] In some embodiments, the A-IoT device sends the PDRCH based on the D2R authorization; or, the A-IoT device sends the PDRCH based on the time domain resource and / or frequency domain resource indicated in the D2R authorization. For example, the A-IoT device sends the PDRCH on the time-frequency resource (i.e., the time domain resource and the frequency domain resource) indicated by the D2R authorization according to the D2R authorization, where the PDRCH is in [T R2D_min , T R2D_maxor if the time interval T of the PDRCH is indicated in the D2R authorization R2D , the PRDCH is sent after T R2D , where T R2D ≥ T R2D_min . T R2D_min is the minimum time interval of the PDRCH, and T R2D_max is the maximum time interval of the PDRCH. Where the PDRCH is sent between [T R2D_min , T R2D_max ] means that the A-IoT device sends the PDRCH again after a first time interval after receiving the PRDCH, and the first time interval is greater than the minimum time interval and less than the maximum time interval, or the first time interval is equal to the minimum time interval, or the first time interval is equal to the maximum time interval. The minimum time interval T R2D_min and the maximum time interval T R2D_max may be agreed upon by the protocol, pre-configured by the reader, or indicated by the reader in the D2R authorization.

[0089] Wherein the reader includes a network device and / or an intermediate node. The network device can be a network device 110 as shown in FIG. 1, or a network device as shown in FIG. 5, or a network device as shown in FIG. 6. The intermediate node includes at least one of the following: a relay, an integrated access backhaul (IAB) node, a user equipment (UE), a repeater, etc. The intermediate node can be an intermediate node as shown in FIG. 6.

[0090] In some embodiments, the A-IoT device sends the PDRCH based on the D2R authorization.

[0091] In summary, the method provided by the embodiments of the present application schedules the sending of the PDRCH by the D2R authorization sent by the reader to the A-IoT device, so that the reader can schedule the sending of the next PDRCH based on the detected current PDRCH sending situation of the A-IoT device. For example, when the A-IoT device is sending the PDRCH, the appropriate time domain resource and / or frequency domain resource for the next PDRCH sending is selected by judging the end time of the current PDRCH, and the D2R authorization can be sent to the terminal device in advance, thereby improving the utilization rate of resources and reducing the latency.

[0092] Next, the content of the D2R authorization is introduced.

[0093] In some embodiments, the D2R grant comprises at least one of first information and second information; the first information is used to indicate time domain resources and / or frequency domain resources of the PDRCH; and the second information is used to indicate D2R grant information other than the first information. Wherein, the second information used to indicate D2R grant information other than the first information can be understood as the second information used to indicate transmission parameters other than time domain resources and frequency domain resources, and the transmission parameters are used to indicate information transmission on the PDRCH. For example, the second information can include modulation and coding scheme, NDI, etc. of the PDRCH. It should be specially noted that the second information can not exist, and in this case, the PDRCH is transmitted according to the first information and a predefined or preconfigured transmission mode.

[0094] In some embodiments, the first information and the second information are transmitted in the form of physical signaling or MAC CE (Media Access Control Control Element); or, the first information is transmitted in the form of physical layer signaling, and the second information is transmitted in the form of MAC CE; or, the first information is transmitted in the form of physical layer signaling or MAC CE. The first information and the second information transmitted in the form of physical signaling or MAC CE can be understood as the D2R grant transmitted in the form of physical signaling or MAC CE.

[0095] In summary, the method provided by the embodiments of the present application shows the specific content of the D2R grant. The main purpose of the D2R grant is to schedule the transmission of the PDRCH, and therefore, the first information indicating the time domain resources and / or the frequency domain resources is carried in the D2R grant to reasonably schedule the transmission of the PDRCH, so as to improve the utilization rate of resources and reduce the latency. In addition, the D2R grant (the first information and / or the second information) is transmitted in the form of physical layer signaling or MAC CE, which can make the D2R grant be processed and responded faster in the A-IoT device, thereby improving the scheduling efficiency of the PDRCH.

[0096] In some embodiments, the D2R grant is carried in the PRDCH, and next, how the PRDCH carries the D2R grant (or the carrying manner of information in the PRDCH) is introduced.

[0097] In some embodiments, the D2R grant is carried in the PRDCH, and the PRDCH comprises a tail part and a non-tail part. The tail part is used to carry the first information and the second information, and the non-tail part is used to carry third information other than the D2R grant; or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information and the third information; or, the tail part is used to carry the first information, and the non-tail part is used to carry the third information; or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information.

[0098] In some embodiments, the tail portion of the PRDCH refers to the last m bits of the PRDCH, where m is determined by the size of the information carried by the tail portion; the non-tail portion of the PRDCH refers to the bits of the PRDCH other than the tail portion, where the size of the non-tail portion is determined by the size of the information carried by the non-tail portion. Optionally, the tail portion of the PRDCH includes an end symbol or does not include an end symbol. The non-tail portion of the PRDCH includes a preamble or does not include a preamble.

[0099] For example, the information carried by the PRDCH is shown in FIGS. 9-12.

[0100] In some embodiments, as shown in FIG. 9, when the D2R grant includes first information and second information, and the PRDCH carries the first information, the second information, and third information, the third information is carried in the non-tail portion, and the D2R grant (i.e., the first information and the second information) is carried in the tail portion. In some embodiments, as shown in FIG. 10, when the D2R grant includes first information and second information, and the PRDCH carries the first information, the second information, and third information, the second information and the third information are carried in the non-tail portion, and the first information is carried in the tail portion. In some embodiments, as shown in FIG. 11, when the D2R grant includes only the first information, and the PRDCH carries the first information and third information, the third information is carried in the non-tail portion, and the first information is carried in the tail portion. In some embodiments, as shown in FIG. 12, when the D2R grant includes first information and second information, and the PRDCH carries the first information and the second information, the second information is carried in the non-tail portion, and the first information is carried in the tail portion.

[0101] In some embodiments, the first information indicating the time domain resource and / or the frequency domain resource is placed in the tail portion, so that the reader can decide the time domain resource and / or the frequency domain resource scheduled to the A-IoT device as late as possible, to avoid the scheduled PDRCH from colliding with or interfering with the PDRCH being transmitted. For example, as shown in FIG. 13, when there is a PDRCH being transmitted on carrier 2, the reader sends a PRDCH including a D2R grant to the A-IoT device on carrier 1, where the D2R grant is used to schedule the A-IoT device to transmit a PDRCH on carrier 2. Since the end time of the PDRCH cannot be accurately estimated, when the D2R grant is sent, the PDRCH being transmitted on carrier 2 has not ended, which may result in failure of the PDRCH scheduling or affect the information of the PDRCH being transmitted. If the D2R grant or the first information in the D2R grant is placed in the tail portion of the PRDCH, the reader can decide how to schedule the PDRCH as late as possible based on the transmission of the PDRCH being transmitted on carrier 2, so as to reasonably schedule the PDRCH.

[0102] In some embodiments, the D2R grant is carried in the PRDCH, but in order to improve transmission efficiency, the PRDCH is usually sent in advance, but if the carrier scheduled by the PRDCH is in an occupied state (i.e., there is a PDRCH being transmitted in the carrier) after the PRDCH transmission ends, if the A-IoT device transmits the next PDRCH based on the D2R grant carried in the PRDCH, it may cause the transmission of the PDRCH being transmitted to fail (e.g., the reader has not obtained the data transmitted by the PDRCH being transmitted). Therefore, the following design can be used.

[0103] In the optional embodiment based on FIG. 7, as shown in FIG. 14, the method further includes step 221 or step 222.

[0104] Step 221: sending at least one reference chip after the PRDCH, the reference chip being used by the A-IoT device to determine a reference point of the PDRCH.

[0105] In some embodiments, the reference chip is used by the A-IoT device to determine a reference point of the PDRCH; or, the reference chip is used by the A-IoT device to determine a reference point of the PDRCH in the time domain; or, the reference chip is used by the A-IoT device to determine a time domain resource for transmitting the PDRCH; or, the last reference chip of the at least one reference chip is used by the A-IoT device to determine a reference point of the PDRCH; or, the last reference chip of the at least one reference chip is used by the A-IoT device to determine a reference point of the PDRCH in the time domain; or, the last reference chip of the at least one reference chip is used by the A-IoT device to determine a time domain resource for transmitting the PDRCH.

[0106] In some embodiments, the reader sends at least one reference chip based on a carrier state, the carrier state being used to indicate an occupation state of a frequency domain resource indicated in the D2R grant. Alternatively, the reference chip is continuously sent in the case that the frequency domain resource indicated in the D2R grant is occupied; the reference chip is stopped in the case that the frequency domain resource indicated in the D2R grant is idle. Or, the reference chip is sent in the case that the reader estimates that the frequency domain resource indicated in the D2R grant is occupied; the reference chip is stopped in the case that the reader estimates that the frequency domain resource indicated in the D2R grant will be idle.

[0107] In some embodiments, the A-IoT device transmits the PDRCH on the time-frequency resource (i.e., the time domain resource and the frequency domain resource) indicated by the D2R grant according to the D2R grant, wherein the PDRCH is transmitted between [T R2D_min , T R2D_max ], or if the time interval T R2DThen in T R2D Then send PRDCH, where T R2D ≥T R2D_min T R2D_min T is the shortest time interval for PDRCH. R2D_max This represents the longest time interval of PDRCH. Specifically, PDRCH occurs within [T...] R2D_min T R2D_max Sending between [time intervals] means that the A-IoT device sends the PDRCH after the reference chip, with the first time interval being greater than the shortest time interval and less than the longest time interval, or the first time interval being equal to the shortest time interval, or the first time interval being equal to the longest time interval. In T R2D The subsequent transmission of PRDCH refers to the A-IoT device sending the PRDCH after the reference chip at interval T. R2D Then send PDRCH. Where T R2D_min T R2D_max and T R2D The reference point is determined based on the reference chip.

[0108] Step 222: Send at least one reference chip after the end symbol of PRDCH (Postamble).

[0109] The terminator is used to indicate the end of PRDCH; or, the terminator is used to indicate the end of PRDCH.

[0110] In some embodiments, at least one reference chip is a repetition of the terminator, or a waveform different from the terminator.

[0111] Detailed information about the reference chip can be found in step 221 above and will not be repeated here.

[0112] In summary, the method provided by the embodiments of the present application transmits at least one reference chip after the PRDCH or the end symbol, so that the A-IoT device determines the reference point of the next PDRCH according to the last reference chip in the at least one reference chip, thereby avoiding collision in the case that the PRDCH ends but the previous PDRCH (or the PDRCH being transmitted) has not ended. As shown in FIG. 15, after the transmission of the PRDHC 10 containing the D2R grant ends, there is a PDRCH 11 being transmitted on the carrier 2 scheduled by the PRDHC 10. If the A-IoT device takes the end position of the PRDCH as the reference point, the PDRCH transmitted by the A-IoT device may collide with the PDRCH 11 being transmitted on the carrier 2. Therefore, the reader transmits at least one reference chip 13 after the PRDCH or the end symbol 12 of the PRDHC after transmitting the PRDCH. The number of the at least one reference chip can be determined based on the estimated end of the PDRCH 11 being transmitted by the network device. The at least one reference chip 13 indicates the reference point 14 of the PDRCH scheduled by the A-IoT device to the A-IoT device. The reference point 14 can be earlier than the end point 15 of the PDRCH 11 being transmitted in the time domain, can be equal to the end point 15, or can be later than the end point 15, which depends on the number determination manner of the reference chip adopted by the reader and the clock accuracy of the A-IoT device. In this way, the collision or transmission failure of the PDRCH can be avoided, and the utilization of resources can be improved.

[0113] In the optional embodiment based on FIG. 8, as shown in FIG. 16, the method further includes step 321 or step 322.

[0114] Step 321: receiving at least one reference chip located after the PRDCH, the reference chip being used to determine the reference point of the PDRCH.

[0115] In some embodiments, the reference chip is used by the A-IoT device to determine the reference point of the PDRCH; or, the reference chip is used by the A-IoT device to determine the reference point of the PDRCH in the time domain; or, the reference chip is used by the A-IoT device to determine the time domain resource for transmitting the PDRCH; or, the last reference chip in the at least one reference chip is used by the A-IoT device to determine the reference point of the PDRCH; or, the last reference chip in the at least one reference chip is used by the A-IoT device to determine the reference point of the PDRCH in the time domain; or, the last reference chip in the at least one reference chip is used by the A-IoT device to determine the time domain resource for transmitting the PDRCH.

[0116] In some embodiments, the A-IoT device transmits the PDRCH on the time-frequency resource (i.e., the time domain resource and the frequency domain resource) indicated by the D2R grant according to the D2R grant, wherein the PDRCH is transmitted in the time domain resource [T R2D_min, T R2D_max is transmitted, or if the time interval T R2D of the PDRCH is indicated in the D2R grant, the PRDCH is transmitted after T R2D , where T R2D ≥ T R2D_min . T R2D_min is the minimum time interval of the PDRCH, and T R2D_max is the maximum time interval of the PDRCH. Where the PRDCH is transmitted between [T R2D_min , T R2D_max ] means that the A-IoT device transmits the PDRCH after a first time interval from the reference chip, the first time interval being greater than the minimum time interval and less than the maximum time interval, or the first time interval being equal to the minimum time interval, or the first time interval being equal to the maximum time interval. The PRDCH is transmitted after T R2D means that the A-IoT device transmits the PDRCH after T R2D from the reference chip. Where T R2D_min , T R2D_max and T R2D are reference points determined according to the reference chip.

[0117] In some embodiments, the A-IoT device determines the reference point of the PDRCH according to at least one reference chip.

[0118] Step 322: receiving at least one reference chip located after the end symbol of the PRDCH.

[0119] Where the end symbol is used to indicate the end of the PRDCH; or, the end symbol is used to indicate the end of the PRDCH.

[0120] In some embodiments, the at least one reference chip is a repetition of the end symbol, or a waveform different from the end symbol.

[0121] The detailed information of the reference chip can refer to the content shown in step 321 above, which will not be repeated here.

[0122] In summary, the method provided by the embodiments of the present application transmits at least one reference chip after the PRDCH or the end symbol, so that the A-IoT device determines the reference point of the next PDRCH according to the last reference chip in the at least one reference chip, thereby avoiding collision in the case that the PRDCH ends but the previous PDRCH (or the PDRCH being transmitted) has not ended. As shown in FIG. 15, after the transmission of the PRDHC 10 containing the D2R grant ends, there is a PDRCH 11 being transmitted on the carrier 2 scheduled by the PRDHC 10. If the A-IoT device takes the end position of the PRDCH as the reference point, collision may occur between the PDRCH transmitted by the A-IoT device and the PDRCH 11 being transmitted on the carrier 2. Therefore, the reader transmits at least one reference chip 13 after the PRDCH or the end symbol 12 of the PRDHC after transmitting the PRDCH. The number of the at least one reference chip can be determined based on the estimated end of the PDRCH 11 being transmitted by the network device. The at least one reference chip 13 indicates the reference point 14 of the PDRCH scheduled by the A-IoT device to the A-IoT device. The reference point 14 can be earlier than the end point 15 of the PDRCH 11 being transmitted in the time domain, can be equal to the end point 15, or can be later than the end point 15, depending on the number determination method of the reference chip adopted by the reader and the clock accuracy of the A-IoT device. This method can avoid PDRCH transmission collision or transmission failure while improving the utilization of resources.

[0123] In some embodiments, the PRDCH needs to perform the processing procedures of adding CRC, code block segmentation, channel coding, rate matching, code block concatenation, scrambling, modulation, layer mapping, etc. before transmission. The above processing procedures can be the same or different for the D2R grant carried in the PRDCH and the third information other than the D2R grant. Next, the processing procedures of the PRDCH including at least two of the first information, the second information and the third information are shown from various aspects.

[0124] 1. Adding CRC.

[0125] CRC is a channel coding technique for generating a short fixed number of check codes according to data, mainly used to detect or check possible errors after data transmission or storage.

[0126] In some embodiments, the third information in the PRDCH, except the D2R grant, adds CRC alone, the first information and the second information add CRC together; or, the third information and the second information add CRC together, the first information adds CRC alone; or, the third information adds CRC alone, the first information adds CRC alone; or, the second information adds CRC alone, the first information adds CRC alone; or, the third information adds CRC alone, the first information and the second information do not add CRC; or, the third information and the second information add CRC together, the first information does not add CRC; or, the third information adds CRC alone, the first information does not add CRC; or, the second information adds CRC alone, the first information does not add CRC; or, at least one of the first information, the second information and the third information does not add CRC; or, at least two of the first information, the second information and the third information add CRC together.

[0127] Wherein, the first information and the second information add CRC together, which can also be understood as the D2R grant adds CRC alone. In the case that the D2R grant includes the first information, the third information and the first information add CRC together, which can be understood as the D2R grant and the third information add CRC together. In the case that the D2R grant includes the first information and the second information, the first information, the second information and the third information add CRC together, which can be understood as the D2R grant and the third information add CRC together. The first information and the second information do not add CRC, which can be understood as the D2R grant does not add CRC.

[0128] That is, in the case where the PRDCH includes the first information, the second information, and the third information, the third information is added with CRC alone, and the first information and the second information are added with CRC in common; or, the third information and the second information are added with CRC in common, and the first information is added with CRC alone; or, the third information is added with CRC alone, and the first information and the second information are not added with CRC; or, the third information and the second information are added with CRC in common, and the first information is not added with CRC; or, the first information, the second information, and the third information are not added with CRC; or, the first information, the second information, and the third information are added with CRC in common; or, the third information is not added with CRC, and the first information and the second information are added with CRC in common; or, the third information and the second information are not added with CRC, and the first information is added with CRC alone; or, the third information is not added with CRC, and the first information is added with CRC alone; or, the second information is not added with CRC, and the first information is added with CRC alone. In the case where the PRDCH includes the first information and the third information, the third information is added with CRC alone, and the first information is added with CRC alone; or, the third information is added with CRC alone, and the first information is not added with CRC; or, the third information is not added with CRC, and the first information is added with CRC alone; or, the first information and the third information are not added with CRC; or, the first information and the third information are added with CRC in common. In the case where the PRDCH includes the first information and the second information, the second information is added with CRC alone, and the first information is added with CRC alone; or, the second information is added with CRC alone, and the first information is not added with CRC; or, the second information is not added with CRC, and the first information is added with CRC alone; or, the first information and the second information are not added with CRC; or, the first information and the second information are added with CRC in common.

[0129] The CRC check code generated when the CRC is added is different according to different data participating in the calculation, that is, the above content is equivalent to that the third information separately adds a first CRC, the first information and the second information jointly add a second CRC; or, the third information and the second information jointly add a third CRC, the first information separately adds a fourth CRC; or, the third information separately adds a first CRC, the first information separately adds a fourth CRC; or, the second information separately adds a fifth CRC, the first information separately adds a fourth CRC; or, the third information separately adds a first CRC, the first information and the second information do not add CRC; or, the third information and the second information jointly add a third CRC, the first information does not add CRC; or, the third information separately adds a first CRC, the first information does not add CRC; or, the second information separately adds a fifth CRC, the first information does not add CRC; or, the third information does not add CRC, the first information and the second information jointly add a second CRC; or, the third information and the second information do not add CRC, the first information separately adds a fourth CRC; or, the third information does not add CRC, the first information separately adds a fourth CRC; or, the second information does not add CRC, the first information separately adds a fourth CRC; or, the PRDCH includes at least one of the first information, the second information and the third information, and the PRDCH does not add CRC; or, at least two of the first information, the second information and the third information jointly add CRC, such as that the first information and the second information jointly add a second CRC, or the first information and the third information jointly add a sixth CRC, or the first information, the second information and the third information jointly add a seventh CRC.

[0130] In summary, the method provided by the embodiments of the present application adds a separate CRC or does not add CRC to the D2R authorization or the first information in the D2R authorization, can support the reader to add CRC to the second information and / or the third information first, enables the reader to determine the D2R authorization or the first information as late as possible, that is, to determine the time domain resource and / or the frequency domain resource of the scheduled PDRCH as late as possible, and can avoid collision of the scheduled PDRCH with the PDRCH being transmitted or interference on the PDRCH being transmitted. Meanwhile, the addition of the CRC can also improve the reliability of the PRDCH transmission.

[0131] 2. Channel coding.

[0132] Channel coding refers to error detection and correction coding of a digital signal to be transmitted in a channel by adding additional redundant bits to information bits. Channel coding can enhance the ability of data to resist various interference when transmitted in a channel.

[0133] In some embodiments, the channel coding includes first channel coding and second channel coding. The third information in the PRDCH except the D2R grant performs the first channel coding alone, and the first information and the second information perform the second channel coding together; or, the third information and the second information perform the first channel coding together, and the first information performs the second channel coding alone; or, the third information performs the first channel coding alone, and the first information performs the second channel coding alone; or, the second information performs the first channel coding alone, and the first information performs the second channel coding alone.

[0134] The first channel coding and the second channel coding adopt the same or different encoding mode and encoding parameter in the encoding. For example, the first channel coding and the second channel coding both adopt LDPC (Low Density Parity Check) coding with a code rate of 0.4; or, the first channel coding adopts LDPC coding with a code rate of 0.8, and the second channel coding adopts LDPC coding with a code rate of 0.4; or, the first channel coding adopts LDPC coding, and the second channel coding adopts Polar coding.

[0135] In some embodiments, the channel coding further includes third channel coding. The third information in the PRDCH except the D2R grant performs the third channel coding alone, and the first information and the second information do not perform the third channel coding; or, the third information and the second information perform the third channel coding together, and the first information does not perform the third channel coding; or, the third information performs the third channel coding alone, and the first information does not perform the third channel coding; or, the second information performs the third channel coding alone, and the first information does not perform the third channel coding; or, the third information does not perform the third channel coding, and the first information and the second information perform the third channel coding together; or, the third information and the second information do not perform the third channel coding, and the first information performs the third channel coding alone; or, the third information does not perform the third channel coding, and the first information performs the third channel coding alone; or, the second information does not perform the third channel coding, and the first information performs the third channel coding alone; or, at least one of the first information, the second information and the third information does not perform the third channel coding; or, at least two of the first information, the second information and the third information perform the third channel coding together.

[0136] The first information and the second information perform the second channel coding together, which can be referred to as the D2R grant performing the second channel coding alone. The first information and the second information do not perform the third channel coding, which can be referred to as the D2R grant not performing the third channel coding.

[0137] The above-mentioned one information performing the channel coding alone means that the channel coding is performed only on the information in the channel coding; and the two information performing the channel coding together means that the two information are spliced and then the channel coding is performed.

[0138] It should be noted that the first channel encoding, the second channel encoding and the third channel encoding all belong to channel encoding, but the corresponding encoding mode and encoding parameter can be the same or different.

[0139] In summary, the method provided by the embodiments of the present application supports performing channel encoding on the D2R grant or the first information in the D2R grant alone or not performing channel encoding, so that the reader determines the time domain resource and / or the frequency domain resource of the scheduled PDRCH as late as possible, thereby avoiding collision of the scheduled PDRCH with the PDRCH being transmitted or interference on the PDRCH being transmitted. Meanwhile, the use of channel encoding can improve the reliability of PRDCH transmission.

[0140] 3. The number of repetitions.

[0141] The repeated transmission of the PRDCH includes information block level repeated transmission and bit level repeated transmission. The information block level repeated transmission can also be referred to as information block repetition, block level repetition, and the bit level repeated transmission can also be referred to as bit repetition, bit level repetition.

[0142] The number of repetitions of the information block repetition refers to R_block times of repetitions of all the transmitted information bit blocks after adding CRC (if CRC is used) received from the higher layer and / or the physical layer. In other words, the number of repetitions of the information block repetition refers to the number of times of repeated transmission of each information bit block (and its CRC), which can be denoted as R_block. In addition, the number of repetitions of the information block repetition refers to the number of times of repeated transmission of all the information bit blocks (and their CRC).

[0143] The number of repetitions of the bit repetition refers to R_bit times of repetitions of each bit after adding CRC (if CRC is used) and performing or not performing forward error correction (FEC) encoding. In other words, the number of repetitions of the bit repetition refers to the number of repetitions of each bit (and its CRC) received from the higher layer and / or the physical layer. In addition, the number of repetitions of the bit repetition refers to the number of repetitions of each bit (and its CRC) received from the higher layer and / or the physical layer and the redundancy bits generated after the forward error correction encoding. Generally, if one or more bits add CRC, redundancy bits will be generated according to the one or more bits and their CRC in the process of forward error correction encoding.

[0144] In some embodiments, the third information in the PRDCH in addition to the D2R grant adopts a first repetition number, the first information and the second information adopt a second repetition number; or, the third information and the second information adopt the first repetition number, the first information adopts the second repetition number; or, the third information adopts the first repetition number, the first information adopts the second repetition number; or, the second information adopts the first repetition number, the first information adopts the second repetition number.

[0145] In some embodiments, the first information and the second information adopt the second repetition number, which can be referred to as the D2R grant adopting the second repetition number. In addition, the first repetition number and the second repetition number correspond to the same or different repetition manners. The first repetition number and the second repetition number correspond to the same or different repetition numbers. Generally, in order to simplify the processing, the first repetition number and the second repetition number correspond to the same repetition manner, such as the first repetition number and the second repetition number both corresponding to the information block level repetition transmission, or the first repetition number and the second repetition number both corresponding to the bit level repetition transmission. In some embodiments, the first information, the second information and the third information adopt different repetition numbers, such as the first information adopting a repetition number 1, the second information adopting a repetition number 2, and the third information adopting a repetition number 3, which are not limited in the embodiments of the present application.

[0146] For example, as shown in FIG. 17, in the case of the information block level repetition transmission, the third information and the CRC thereof are one information block (denoted as information block a1), and the D2R grant (i.e. the first information and the second information) and the CRC thereof are another information block (denoted as information block a2). In FIG. 17, the repetition number of the information block a1 in the PRDCH is 2 (i.e. the first repetition number is 2), and the repetition number of the information block a2 is also 2 (i.e. the second repetition number is also 2), and at this time, the first repetition number is equal to the second repetition number. FIG. 18 also shows the scenario of the information block level repetition transmission, the third information and the second information and the CRC thereof are one information block (denoted as information block a3), and the first information is another information block (denoted as information block a4). In FIG. 18, the repetition number of the information block a3 in the PRDCH is 1 (i.e. the first repetition number is 1), and the repetition number of the information block a4 is 2 (i.e. the second repetition number is 2), and at this time, the first repetition number is different from the second repetition number.

[0147] In summary, the method provided by the embodiments of the present application supports the same repetition number or different repetition numbers for the D2R grant or the first information in the D2R grant and other information, so that the reader can determine the repetition number based on the importance of at least one of the first information, the second information and the third information and the current channel state, and in the case of poor channel state, the repetition number can be increased to improve the possibility of complete reception of the information, thereby improving the reliability of the PRDCH transmission.

[0148] In some embodiments, the second information comprises at least one of: a TBS (Transport Block Size) of the PDRCH; a duration of the PDRCH; a number of repetitions of the PDRCH; an NDI (New Data Indicator) for indicating whether the PDRCH is retransmitted; a preamble length of the PDRCH; an identity of the A-IoT device.

[0149] The TBS of the PDRCH is used to indicate the size of a transport block (TB) in the PDRCH, where the transport block refers to a payload transferred between a MAC layer and a physical layer. The TBS of the PDRCH can also be referred to as the number of bits of the PDRCH, or the number of bits of the information carried by the PDRCH, or the number of bits indication of the PDRCH. For example, the TBS of the PDRCH is indicated as 320 bits. The duration of the PDRCH is used to schedule the transmission time of the PDRCH, which can be understood as the transmission time from the beginning to the end of the PDRCH. For example, the duration of the PDRCH can be expressed as an absolute time, such as an absolute time expressed in ms (milliseconds); or the duration of the PDRCH can also be expressed as the number of time domain resources, where the unit of the time domain resource is predefined, such as defining the length of one time domain resource corresponding to one OFDM symbol, or defining the length of one time domain resource corresponding to at least one PRDCH chip. Here, the length of the PRDCH chip is defined based on the length of the PRDCH chip rather than the length of the PRDHC chip, because the clock accuracy of the A-IoT device is usually not high, while the clock accuracy of the reader is higher, and the length of the PRDHC chip sent by the reader is more accurate and more reliable than the length of the PDRCH chip sent by the A-IoT device. Alternatively, the duration of the PDRCH can also be referred to as the duration of the PDRCH. The number of repetitions of the PDRCH refers to the number of repetitions of the transport block in the PDRCH, or the number of repetitions of the information carried by the PDRCH, or the number of repetitions of the data block carried by the PDRCH, or the number of repetitions of the information block carried by the PDRCH. The TBS, the duration, and the number of repetitions are related to each other. The TBS is proportional to the transmission time of the PDRCH, the number of repetitions is proportional to the transmission time of the PDRCH, and the duration is the expected (or scheduled) transmission time of the PDRCH. The NDI is used to indicate whether the PDRCH is retransmitted, or in other words, the NDI is used to indicate whether the PDRCH scheduled this time carries new data. The retransmission of the PDRCH refers to the retransmission of the data transmitted by the PDRCH last time. For example, the NDI can be 1 bit in the D2R grant, and whether the PDRCH is retransmitted is indicated by the bit value of the bit. The identifier of the A-IoT device can be used to scramble the CRC of the D2R grant, or the CRC of the first information in the D2R grant, or the CRC of the second information in the D2R grant.

[0150] In some embodiments, the D2R grant or the second information indicates the PDRCH retransmission by the NDI, in order to simplify the receiving and detecting procedure of the A-IoT device, it can be agreed that the NDI is located at the beginning of the D2R grant; or, the NDI is located at the beginning of the second information. For example, in the case that the NDI is indicated by n bits (which can be referred to as a bit field including n bits), the beginning of the D2R grant is the first n bits in the D2R grant; or, the beginning of the D2R grant refers to the beginning part of the D2R grant, and the beginning part of the D2R grant is a pre-agreed m bits, m is greater than n; or, the beginning of the second information refers to the first n bits in the second information; or, the beginning of the second information refers to the beginning part of the second information, and the beginning part of the second information is a pre-agreed m bits. Both n and m are positive integers.

[0151] In summary, the method provided by the embodiments of the present application further includes the second information indicating other D2R grant information in the D2R grant, such as the number of repetitions, the duration, the NDI and other information related to the transmission of the PDRCH, which is set by the reader, thereby simplifying the sending procedure of the PDRCH for the A-IoT device.

[0152] In some embodiments, in addition to the first information indicating the time domain resource and / or the frequency domain resource, the D2R grant further includes the second information for indicating other D2R grant information. The second information can be used to indicate the duration, the TBS, the number of repetitions and the like in the PDRCH. However, the duration, the TBS, the number of repetitions and the like can also be determined by the A-IoT device, and in this case, there are the following several determination modes of the PDRCH.

[0153] The first determination mode: the reader indicates the TBS and the number of repetitions; the second determination mode: the reader indicates the duration, the A-IoT device indicates the TBS, and the number of repetitions is determined based on the duration and the TBS; the third determination mode: the reader indicates the TBS and the duration, and the number of repetitions is determined based on the TBS and the duration.

[0154] Next, the above several determination modes of the PDRCH are introduced.

[0155] The first determination mode: the reader indicates the TBS and the number of repetitions.

[0156] In the optional embodiment based on FIG. 7, the second information includes the TBS of the PDRCH and / or the number of repetitions of the PDRCH, that is, the D2R grant includes the TBS of the PDRCH and / or the number of repetitions of the PDRCH. The reader stops sending the carrier for backscattering before the A-IoT device stops sending the PDRCH. Or, the reader stops the A-IoT device from sending the PDRCH by stopping sending the carrier for backscattering.

[0157] wherein the second information includes a bit field for indicating the TBS and a bit field for indicating the repetition number.

[0158] In some embodiments, the second information includes the TBS of the PDRCH and / or the repetition number of the PDRCH, which can be referred to as the D2R grant including the TBS of the PDRCH and / or the repetition number of the PDRCH. The second information includes a bit field for indicating the TBS and a bit field for indicating the repetition number, which can be referred to as the D2R grant including a bit field for indicating the TBS and a bit field for indicating the repetition number.

[0159] In the case that the second information includes the TBS of the PDRCH and / or the repetition number of the PDRCH, the repetition manner adopted by the PDRCH can be the information block level repetition transmission as shown above or the bit level repetition transmission as shown above.

[0160] In some embodiments, the reader stops transmitting the carrier for backscattering in the case that the first condition is met. In other words, the reader stops the A-IoT device transmitting the PDRCH by stopping transmitting the carrier for backscattering in the case that the first condition is met.

[0161] Optionally, the first condition includes at least one of the following: the reader decodes the complete and correct information from the PDRCH; the reader indicates a new D2R grant; the current time is the expected end time of the PDRCH, which is determined based on the TBS and / or the repetition number.

[0162] For example, the PDRCH repeatedly transmits multiple times of D2R data in a manner of information block repetition. In the case that the reader receives and parses one information block to obtain complete and correct D2R data, the reader can actively stop transmitting the carrier for backscattering to stop the A-IoT device from transmitting the PDRCH this time, and the reader retransmits the carrier for backscattering to the A-IoT device only when the reader needs to schedule the A-IoT device to transmit the PDRCH again. Or, the reader stops transmitting the carrier for backscattering to indicate the A-IoT device to stop transmitting the PDRCH when the reader needs to indicate a new D2R grant, and the reader transmits the PRDCH containing the new D2R grant to the A-IoT device and retransmits the carrier for backscattering to the A-IoT device after the second time of stopping the carrier transmission. Or, the reader calculates the expected end time of the PDRCH, and stops transmitting the carrier for backscattering to the A-IoT device when the expected end time is reached. The first condition can also be a combination of the above conditions, such as stopping transmitting the carrier for backscattering to the A-IoT device when both the complete and correct information is decoded from the PDRCH and the reader indicates a new D2R grant; or stopping transmitting the carrier for backscattering to the A-IoT device when both the complete and correct information is decoded from the PDRCH and the current time is the expected end time of the PDRCH; or stopping transmitting the carrier for backscattering to the A-IoT device when both the reader indicates a new D2R grant and the current time is the expected end time of the PDRCH; or stopping transmitting the carrier for backscattering to the A-IoT device when all of the complete and correct information is decoded from the PDRCH, the reader indicates a new D2R grant, and the current time is the expected end time of the PDRCH.

[0163] In the optional embodiment based on FIG. 8, the second information includes the TBS of the PDRCH and / or the number of repetitions of the PDRCH. The A-IoT device stops transmitting the PDRCH when the carrier for backscattering is not detected. For example, the A-IoT device stops backscattering when the carrier is not detected during backscattering, and transmits the channel PDRCH based on the next D2R grant when received.

[0164] In some embodiments, the carrier for backscattering is stopped by the reader when the first condition is met.

[0165] In summary, the method provided by the embodiments of the present application can reduce the complexity of the A-IoT device in implementing PDRCH transmission by indicating the TBS and the number of repetitions by the reader. In addition, since the clock accuracy of the A-IoT device is not high, the reader can stop the transmission of the PDRCH by stopping the transmission of the carrier for backscattering, which enables the reader to end the transmission of the PDRCH in advance in the case of receiving complete information, reduces the amount of information transmitted repeatedly by the PDRCH, and saves the overhead of the A-IoT device and the reader. In addition, the first condition for the reader to stop the transmission of the carrier is also shown, which improves the reliability of the method.

[0166] The second determination method: the reader indicates the duration, the A-IoT device indicates the TBS, and the number of repetitions is determined based on the duration and the TBS.

[0167] In some embodiments, the second information includes the duration of the PDRCH, and the TBS of the PDRCH and / or the number of repetitions of the PDRCH are determined by the A-IoT device based on the duration.

[0168] In some embodiments, the second information includes the duration of the PDRCH, which can be referred to as a D2R grant including the duration of the PDRCH.

[0169] In some embodiments, the TBS of the PDRCH and / or the number of repetitions of the PDRCH are determined by the A-IoT device based on the duration in the second information. The A-IoT device will first determine the TBS based on the D2R data to be transmitted, and indicate the determined TBS in the PDRCH. Since the clock accuracy of the A-IoT device is low, the actual transmission time of the A-IoT device may be different for the same size of transmission block. Therefore, the A-IoT device repeatedly transmits the D2R data (which can also be referred to as a database, a transmission block, etc.) according to the duration of the current PDRCH and the duration indicated by the second information during the transmission process, so as to determine the number of repetitions of the PDRCH.

[0170] In some embodiments, the A-IoT device indicates the TBS at the beginning of the PDRCH. The beginning of the PDRCH refers to the beginning part of the PDRCH. The beginning part of the PDRCH is a predetermined m-bit, and the bit field (at least one bit) corresponding to the TBS belongs to the m-bit. Optionally, the beginning part of the PDRCH includes a preamble, or the beginning part of the PDRCH does not include a preamble.

[0171] For example, as shown in FIG. 19, at the beginning of the PDRCH, there is a bit field indicating the TBS after the preamble. After the A-IoT device transmits the preamble, the TBS bit field, and 1 D2R data, if the duration of the PDRCH has not been reached, the D2R data can be transmitted once more. The information contained in the repeatedly transmitted D2R data is the same as that contained in the first transmitted D2R data. If the duration of the PDRCH has not been reached after the first repeated transmission of the D2R data, the D2R data can be repeatedly transmitted again until the duration of the PDRCH is met. In this case, the repeated transmission can only be repeated for the D2R data, or the repeated transmission can be repeated for the D2R data and the control information (such as the TBS bit field, etc.). In addition, the end condition of the repeated transmission can be that the currently transmitted PDRCH has met the duration of the PDRCH; or, the remaining time of the PDRCH is not enough to repeat the D2R data once, etc. The embodiments of the present application do not limit this.

[0172] In the repeated transmission shown in FIG. 19, the repeated transmission is a block-level repeated transmission, but the PDRCH can also use a bit-level repeated transmission when transmitting. In the case of using a bit-level repeated transmission for the PDRCH, the A-IoT device still determines the TBS and indicates it at the beginning of the PDRCH. After determining the number of repetitions based on the TBS and the duration, the PDRCH is transmitted.

[0173] In summary, the method provided by the embodiments of the present application indicates the duration by the reader, and the A-IoT device determines the TBS and the number of repetitions, which improves the flexibility of the A-IoT device in processing the number of repetitions to a certain extent.

[0174] Determination mode three: the reader indicates the TBS and the duration, and the number of repetitions is determined based on the TBS and the duration.

[0175] In some embodiments, the second information includes the TBS of the PDRCH and the duration of the PDRCH, and the number of repetitions of the PDRCH is determined by the A-IoT device based on the TBS of the PDRCH and the duration of the PDRCH.

[0176] In some embodiments, the second information includes the TBS of the PDRCH and the duration of the PDRCH, which can be referred to as the D2R grant including the TBS of the PDRCH and the duration of the PDRCH. Optionally, there is a bit field for indicating the TBS and a bit field for indicating the duration in the second information, which can also be referred to as the bit field for indicating the TBS and the bit field for indicating the duration in the D2R grant.

[0177] For example, as shown in FIG. 20, after the A-IoT device sends a preamble and a PDRCH data block, the duration of the PDRCH has not been reached, so the A-IoT device selects to repeatedly send the PDRCH data block, and so on. Until the duration of the PDRCH is reached, at the moment when the duration of the PDRCH is reached, the A-IoT device immediately stops sending the PDRCH data block (even if the PDRCH data block has not been completely sent). The PDRCH data block includes at least one of the following: D2R data; D2R control information; and CRC.

[0178] In summary, the method provided by the embodiments of the present application indicates the TBS and the duration by the reader, and the A-IoT device determines the number of repetitions during PDRCH transmission, so that the A-IoT device can flexibly handle the number of repetitions according to the real-time transmission time (since the clock accuracy of the A-IoT device is low, even if the TBS is agreed, the transmission time of each data block of the transmission can also be different). Moreover, the A-IoT device no longer determines and indicates the TBS to the reader, thereby saving the overhead of the A-IoT device and reducing the complexity of the A-IoT device.

[0179] In addition, the determination manner of the TBS, the number of repetitions, and the duration when the PDRCH is retransmitted is also shown.

[0180] In some embodiments, the reader can trigger the A-IoT device to retransmit the PDRCH sent before by sending a D2R grant. In order to reduce the amount of data cached by the device, after the A-IoT device receives the D2R grant including the retransmission indication, the A-IoT device can re-encode and send the transmission block sent last time. The redundancy version (RV) of the retransmission code block can be the same as the last time. For example, there can be an NDI bit field in the D2R grant, which is used to trigger the A-IoT device to perform PDRCH retransmission. The bit field can be located at the beginning of the D2R grant to simplify the detection of the A-IoT device. The NDI field can be 1 bit, if it is 1, it means no retransmission (i.e., initial transmission), if it is 0, it means retransmission (it can also be the opposite, i.e., 1 means retransmission, and 0 means no retransmission); or if the value of the NDI in the current D2R grant is the same as the value of the NDI in the last D2R grant, retransmission is triggered, otherwise, initial transmission is triggered.

[0181] In some embodiments, the D2R grant for triggering D2R retransmission can be sent separately in the form of control information, i.e., not sent together with R2D data. The D2R grant can only include time-frequency resources and NDI, add CRC, and the device ID is used to scramble the CRC of the D2R grant; or only include the device ID, time-frequency resources and NDI, and add CRC.

[0182] Specifically, the reader can trigger the device to retransmit in the following ways:

[0183] • If the NDI bit field in the D2R grant indicates retransmission, and the number of repetitions is not included in the D2R grant, the device will re-encode the TB transmitted last time after receiving the retransmission indication, and then transmit the code blocks once, i.e., without repetition.

[0184] • If the NDI bit field in the D2R grant indicates retransmission, and the number of repetitions is included in the D2R grant, the device will re-encode the TB transmitted last time after receiving the retransmission indication, and then transmit the code blocks for the indicated number of repetitions.

[0185] That is, in the case where the D2R grant indicates retransmission, the number of repetitions can be indicated independently, and the retransmission supports a different number of repetitions from the initial transmission.

[0186] In some embodiments, the information in the D2R grant can be split based on the different parts of the PRDCH, which can be processed differently when transmitted, so there are different combinations of transmission methods for the D2R grant. Next, several transmission methods for the D2R grant (not all combinations, only selected parts are shown) are introduced.

[0187] The information in the D2R grant is not split, and the D2R grant is processed separately.

[0188] In some embodiments, the D2R grant is transmitted in the form of physical layer signaling or MAC layer signaling, and the D2R grant is transmitted at the end of the PRDCH, as shown in FIG. 21. The advantage of this method is that since the D2R grant is at the end of the PRDCH, the reader can decide the time-frequency resources scheduled to the device as late as possible, so that the end time of the ongoing PDRCH can be more accurately determined, and appropriate time-frequency resources can be selected for the transmission of the new PDRCH.

[0189] In some embodiments, if the PRDCH is channel encoded, the information bits in the D2R grant should be separately channel encoded and separately added with CRC, so that the D2R grant does not need to be generated before the PRDCH is transmitted. If the PRDCH is not channel encoded, the D2R grant can be jointly added with CRC with the R2D data and / or control information.

[0190] In some embodiments, if the PRDCH adopts information block level repetition transmission, where the information block level repetition number refers to the repetition of R_block times of all the transmitted information bit blocks received from the higher layer and / or physical layer after adding CRC (if CRC is used), then the D2R grant can add CRC separately and implement information block level repetition transmission separately, as shown in FIG. 22, where both the “R2D data and / or control information + CRC” and the “D2R grant + CRC” are repeated twice, and it is specially noted that the repetition numbers of the two parts can be different, which will not be described here in detail.

[0191] In some embodiments, if the PRDCH adopts bit level repetition transmission, where the bit level repetition number refers to the repetition of R_bit times of each bit after adding CRC (if CRC is used) and with or without forward error correction coding, then the repetition number of the bits in the D2R grant can be different from other information (such as R2D data and / or control information) in the PRDCH.

[0192] In some embodiments, this mode can be implemented in combination with at least one of the above steps 221, 222, 321 and 322, that is, at least one reference chip is sent after the PRDCH sent in the case of “not splitting the information in the D2R grant, the D2R grant is processed separately”, to achieve the purpose of sending the D2R grant to the A-IoT device in advance without affecting the PDRCH being sent.

[0193] Splitting the information in the D2R grant, the first information is processed separately.

[0194] In this embodiment, the D2R grant can be divided into first information and second information, where the first information is used to indicate the time-frequency resource, such as the frequency position of the PDRCH, or the T R2D and the frequency position of the PRDCH, and the second information is used to indicate other D2R grant information, and the specific content of the second information is not limited here. The first information is sent at the end of the PRDCH in the form of physical layer signaling or MAC layer signaling.

[0195] In some embodiments, if the PRDCH adopts channel coding, then the first information should be separately channel coded or not channel coded, and CRC can be added separately, so that the first part does not need to be determined before sending the PRDCH.

[0196] In some embodiments, if PRDCH adopts information block level repetition transmission, the number of information block level repetitions refers to R_block repetitions of all blocks of transmitted information bits received from the higher layer and / or physical layer after adding CRC (if CRC is used). The first information can be repeated at the block level alone, as shown in FIG. 23. It is specifically pointed out that the number of repetitions of the first information can be different from “R2D data and / or control information + second information in D2R grant + CRC”. In addition, the first information can be added with or without CRC, which is not described here in detail.

[0197] In some embodiments, if PRDCH adopts bit level repetition transmission, the number of bit level repetitions refers to R_bit repetitions of each bit after adding CRC (if CRC is used) and with or without forward error correction coding. The number of repetitions of the bits of the first information in the D2R grant can be different from other information in the PRDCH (such as R2D data and / or control information + second information in D2R grant).

[0198] In some embodiments, this mode can be implemented in combination with at least one of the above steps 221, step 222, step 321 and step 322, that is, at least one reference chip is sent after the PRDCH sent in the case of “splitting the information in the D2R grant, the first information is processed alone”, to achieve the purpose of sending the D2R grant to the A-IoT device in advance without affecting the PDRCH being sent.

[0199] It is pointed out that the above several processing modes can be implemented in combination.

[0200] The above-mentioned “1. Add CRC” and “2. Channel coding” processing procedures can be implemented in combination.

[0201] In the case that the third information is added with CRC alone and the first information and the second information are added with CRC together, the third information performs the first channel coding alone, and the first information and the second information perform the second channel coding together; or, in the case that the third information is added with CRC alone and the first information and the second information are added with CRC together, the third information performs the third channel coding alone, and the first information and the second information do not perform the third channel coding; or, in the case that the third information is added with CRC alone and the first information and the second information are added with CRC together, the third information does not perform the third channel coding, and the first information and the second information perform the third channel coding together; or, in the case that the third information and the second information are added with CRC together and the first information is added with CRC alone, the third information and the second information perform the first channel coding together, and the first information performs the second channel coding alone; or, in the case that the third information and the second information are added with CRC together and the first information is added with CRC alone, the third information and the second information perform the third channel coding together, and the first information does not perform the third channel coding; or, in the case that the third information and the second information are added with CRC together and the first information is added with CRC alone, the third information and the second information do not perform the third channel coding, and the first information performs the third channel coding alone; or, in the case that the third information is added with CRC alone and the first information is added with CRC alone, the third information performs the first channel coding alone, and the first information performs the second channel coding alone; or, in the case that the third information is added with CRC alone and the first information is added with CRC alone, the third information performs the third channel coding alone, and the first information does not perform the third channel coding; or, in the case that the third information is added with CRC alone and the first information is added with CRC alone, the third information does not perform the third channel coding, and the first information performs the third channel coding alone; or, in the case that the second information is added with CRC alone and the first information is added with CRC alone, the second information performs the first channel coding alone, and the first information performs the second channel coding alone; or, in the case that the second information is added with CRC alone and the first information is added with CRC alone, the second information performs the third channel coding alone, and the first information does not perform the third channel coding; or, in the case that the second information is added with CRC alone and the first information is added with CRC alone, the second information does not perform the third channel coding, and the first information performs the third channel coding alone; or, in the case that the third information is added with CRC alone and the first information and the second information are not added with CRC, the third information performs the first channel coding alone, and the first information and the second information perform the second channel coding together; or, in the case that the third information is added with CRC alone and the first information and the second information are not added with CRC, the third information performs the third channel coding alone, and the first information and the second information do not perform the third channel coding; or, in the case that the third information is added with CRC alone and the first information and the second information are not added with CRC, the third information does not perform the third channel coding, and the first information and the second information perform the third channel coding together;or, in the case where the third information and the second information add CRC together and the first information does not add CRC, the third information and the second information perform the first channel coding together and the first information performs the second channel coding alone; or, in the case where the third information and the second information add CRC together and the first information does not add CRC, the third information and the second information perform the third channel coding together and the first information does not perform the third channel coding; or, in the case where the third information and the second information add CRC together and the first information does not add CRC, the third information and the second information do not perform the third channel coding and the first information performs the third channel coding alone; or, in the case where the third information adds CRC alone and the first information does not add CRC, the third information performs the first channel coding alone and the first information performs the second channel coding alone; or, in the case where the third information adds CRC alone and the first information does not add CRC, the third information performs the third channel coding alone and the first information does not perform the third channel coding; or, in the case where the third information adds CRC alone and the first information does not add CRC, the third information does not perform the third channel coding and the first information performs the third channel coding alone; or, in the case where the second information adds CRC alone and the first information does not add CRC, the second information performs the first channel coding alone and the first information performs the second channel coding alone; or, in the case where the second information adds CRC alone and the first information does not add CRC, the second information performs the third channel coding alone and the first information does not perform the third channel coding; or, in the case where the second information adds CRC alone and the first information does not add CRC, the second information does not perform the third channel coding and the first information performs the third channel coding alone; or, in the case where the first information, the second information and the third information do not add CRC, the first information, the second information and the third information perform the third channel coding together; or, in the case where the first information, the second information and the third information do not add CRC, the first information, the second information and the third information do not perform the third channel coding; or, in the case where the first information and the third information do not add CRC, the first information and the third information perform the third channel coding together; or, in the case where the first information and the third information do not add CRC, the first information and the third information do not perform the third channel coding; or, in the case where the first information, the second information and the third information add CRC together, the first information, the second information and the third information perform the third channel coding together; or, in the case where the first information, the second information and the third information add CRC together, the first information, the second information and the third information do not perform the third channel coding; or, in the case where the first information and the third information add CRC together, the first information and the third information perform the third channel coding together; or, in the case where the first information and the third information add CRC together, the first information and the third information do not perform the third channel coding.

[0202] The above-mentioned processes of "1. Adding CRC" and "3. Repetition number" can be implemented in combination.

[0203] In the case that the third information is added with CRC alone and the first information and the second information are added with CRC together, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or, in the case that the third information is added with CRC alone and the first information and the second information are added with CRC together, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or, in the case that the third information is added with CRC alone and the first information and the second information are added with CRC together, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or, in the case that the third information and the second information are added with CRC together and the first information is added with CRC alone, the third information and the second information adopt the first repetition number, and the first information adopts the second repetition number; or, in the case that the third information and the second information are added with CRC together and the first information is added with CRC alone, the third information and the second information adopt the first repetition number, and the first information adopts the second repetition number; or, in the case that the third information and the second information are added with CRC together and the first information is added with CRC alone, the third information and the second information adopt the first repetition number, and the first information adopts the second repetition number; or, in the case that the third information is added with CRC alone, the first information is added with CRC alone, the third information adopts the first repetition number, and the first information adopts the second repetition number; or, in the case that the third information is added with CRC alone, the first information is added with CRC alone, the third information adopts the first repetition number, and the first information adopts the second repetition number; or, in the case that the third information is added with CRC alone, the first information is added with CRC alone, the third information adopts the first repetition number, and the first information adopts the second repetition number; or, in the case that the second information is added with CRC alone, the first information is added with CRC alone, the second information adopts the first repetition number, and the first information adopts the second repetition number; or, in the case that the second information is added with CRC alone, the first information is added with CRC alone, the second information adopts the first repetition number, and the first information adopts the second repetition number; or, in the case that the second information is added with CRC alone, the first information is added with CRC alone, the second information adopts the first repetition number, and the first information adopts the second repetition number; or, in the case that the third information is added with CRC alone, the first information and the second information are not added with CRC, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or, in the case that the third information is added with CRC alone, the first information and the second information are not added with CRC, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or, in the case that the third information is added with CRC alone, the first information and the second information are not added with CRC, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number.or, in the case where the third information and the second information are added with CRC and the first information is not added with CRC, the third information and the second information adopt the first repetition number and the first information adopts the second repetition number; or, in the case where the third information and the second information are added with CRC and the first information is not added with CRC, the third information and the second information adopt the first repetition number and the first information adopts the second repetition number; or, in the case where the third information and the second information are added with CRC and the first information is not added with CRC, the third information and the second information adopt the first repetition number and the first information adopts the second repetition number; or, in the case where the third information is added with CRC and the first information is not added with CRC, the third information adopts the first repetition number and the first information adopts the second repetition number; or, in the case where the third information is added with CRC and the first information is not added with CRC, the third information adopts the first repetition number and the first information adopts the second repetition number; or, in the case where the third information is added with CRC and the first information is not added with CRC, the third information adopts the first repetition number and the first information adopts the second repetition number; or, in the case where the second information is added with CRC and the first information is not added with CRC, the second information adopts the first repetition number and the first information adopts the second repetition number; or, in the case where the second information is added with CRC and the first information is not added with CRC, the second information adopts the first repetition number and the first information adopts the second repetition number; or, in the case where the second information is added with CRC and the first information is not added with CRC, the second information adopts the first repetition number and the first information adopts the second repetition number; or, in the case where the first information, the second information and the third information are not added with CRC, the first information, the second information and the third information adopt the same repetition number; or, in the case where the first information and the third information are not added with CRC, the first information and the third information adopt the same repetition number; or, in the case where the first information, the second information and the third information are added with CRC, the first information, the second information and the third information adopt the same repetition number; or, in the case where the first information and the third information are added with CRC, the first information and the third information adopt the same repetition number.

[0204] The above-mentioned processes of "2. Channel coding" and "3. Repetition number" can be implemented in combination.

[0205] In a case where the third information is separately subjected to the first channel coding, the first information and the second information are commonly subjected to the second channel coding, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or in a case where the third information is separately subjected to the third channel coding, the first information and the second information are not subjected to the third channel coding, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or in a case where the third information is not subjected to the third channel coding, the first information and the second information are commonly subjected to the third channel coding, the third information adopts the first repetition number, and the first information and the second information adopt the second repetition number; or in a case where the third information and the second information are commonly subjected to the first channel coding, the first information is separately subjected to the second channel coding, the third information and the second information adopt the first repetition number, and the first information adopts the second repetition number; or in a case where the third information and the second information are commonly subjected to the third channel coding, the first information is not subjected to the third channel coding, the third information and the second information adopt the first repetition number, and the first information adopts the second repetition number; or in a case where the third information and the second information are not subjected to the third channel coding, the first information is separately subjected to the third channel coding, the third information and the second information adopt the first repetition number, and the first information adopts the second repetition number; or in a case where the third information is separately subjected to the first channel coding, the first information is separately subjected to the second channel coding, the third information adopts the first repetition number, and the first information adopts the second repetition number; or in a case where the third information is separately subjected to the third channel coding, the first information is not subjected to the third channel coding, the third information adopts the first repetition number, and the first information adopts the second repetition number; or in a case where the third information is not subjected to the third channel coding, the first information is separately subjected to the third channel coding, the third information adopts the first repetition number, and the first information adopts the second repetition number; or in a case where the second information is separately subjected to the first channel coding, the first information is separately subjected to the second channel coding, the second information adopts the first repetition number, and the first information adopts the second repetition number; or in a case where the second information is separately subjected to the third channel coding, the first information is not subjected to the third channel coding, the second information adopts the first repetition number, and the first information adopts the second repetition number; or in a case where the second information is not subjected to the third channel coding, the first information is separately subjected to the third channel coding, the second information adopts the first repetition number, and the first information adopts the second repetition number; or in a case where the first information, the second information, and the third information are commonly subjected to the third channel coding, the first information, the second information, and the third information adopt the same repetition number; or in a case where the first information, the second information, and the third information are not subjected to the third channel coding, the first information, the second information, and the third information adopt the same repetition number; or in a case where the first information and the third information are commonly subjected to the third channel coding, the first information and the third information adopt the same repetition number;Or, in a case where the first information and the third information do not perform the third channel coding, the first information and the third information adopt the same repetition number.

[0206] The above-described processes of "1. adding CRC", "2. channel coding", and "3. repetition number" can be implemented in combination.

[0207] In the case where the third information is separately added with CRC and the first and second information are commonly added with CRC, the third information is separately subjected to the first channel coding and uses the first repetition number, the first and second information are commonly subjected to the second channel coding and use the second repetition number; or, in the case where the third information is separately added with CRC and the first and second information are commonly added with CRC, the third information is separately subjected to the third channel coding and uses the first repetition number, the first and second information are not subjected to the third channel coding but use the second repetition number; or, in the case where the third information is separately added with CRC and the first and second information are commonly added with CRC, the third information is not subjected to the third channel coding but uses the first repetition number, the first and second information are commonly subjected to the third channel coding and use the second repetition number; or, in the case where the third and second information are commonly added with CRC and the first information is separately added with CRC, the third and second information are commonly subjected to the first channel coding and use the first repetition number, the first information is separately subjected to the second channel coding and uses the second repetition number; or, in the case where the third and second information are commonly added with CRC and the first information is separately added with CRC, the third and second information are commonly subjected to the third channel coding and use the first repetition number, the first information is not subjected to the third channel coding but uses the second repetition number; or, in the case where the third and second information are commonly added with CRC and the first information is separately added with CRC, the third and second information are not subjected to the third channel coding but use the first repetition number, the first information is separately subjected to the third channel coding and uses the second repetition number; or, in the case where the third information is separately added with CRC and the first information is separately added with CRC, the third information is separately subjected to the first channel coding and uses the first repetition number, the first information is separately subjected to the second channel coding and uses the second repetition number; or, in the case where the third information is separately added with CRC and the first information is separately added with CRC, the third information is separately subjected to the third channel coding and uses the first repetition number, the first information is not subjected to the third channel coding but uses the second repetition number; or, in the case where the third information is separately added with CRC and the first information is separately added with CRC, the third information is not subjected to the third channel coding but uses the first repetition number, the first information is separately subjected to the third channel coding and uses the second repetition number; or, in the case where the second information is separately added with CRC and the first information is separately added with CRC, the second information is separately subjected to the first channel coding and uses the first repetition number, the first information is separately subjected to the second channel coding and uses the second repetition number; or, in the case where the second information is separately added with CRC and the first information is separately added with CRC, the second information is separately subjected to the third channel coding and uses the first repetition number, the first information is not subjected to the third channel coding but uses the second repetition number; or, in the case where the second information is separately added with CRC and the first information is separately added with CRC, the second information is not subjected to the third channel coding but uses the first repetition number, the first information is separately subjected to the third channel coding and uses the second repetition number.or, in the case that the third information is separately added with CRC and the first information and the second information are not added with CRC, the third information is separately subjected to the first channel coding and the first repetition number is used, the first information and the second information are commonly subjected to the second channel coding and the second repetition number is used; or, in the case that the third information is separately added with CRC and the first information and the second information are not added with CRC, the third information is separately subjected to the third channel coding and the first repetition number is used, the first information and the second information are not subjected to the third channel coding but the second repetition number is used; or, in the case that the third information is separately added with CRC and the first information and the second information are not added with CRC, the third information is not subjected to the third channel coding but the first repetition number is used, the first information and the second information are commonly subjected to the third channel coding and the second repetition number is used; or, in the case that the third information and the second information are commonly added with CRC and the first information is not added with CRC, the third information and the second information are commonly subjected to the first channel coding and the first repetition number is used, the first information is separately subjected to the second channel coding and the second repetition number is used; or, in the case that the third information and the second information are commonly added with CRC and the first information is not added with CRC, the third information and the second information are commonly subjected to the third channel coding and the first repetition number is used, the first information is not subjected to the third channel coding but the second repetition number is used; or, in the case that the third information and the second information are commonly added with CRC and the first information is not added with CRC, the third information and the second information are not subjected to the third channel coding but the first repetition number is used, the first information is separately subjected to the third channel coding and the second repetition number is used; or, in the case that the third information is separately added with CRC and the first information is not added with CRC, the third information is separately subjected to the first channel coding and the first repetition number is used, the first information is separately subjected to the second channel coding and the second repetition number is used; or, in the case that the third information is separately added with CRC and the first information is not added with CRC, the third information is separately subjected to the third channel coding and the first repetition number is used, the first information is not subjected to the third channel coding but the second repetition number is used; or, in the case that the third information is separately added with CRC and the first information is not added with CRC, the third information is not subjected to the third channel coding but the first repetition number is used, the first information is separately subjected to the third channel coding and the second repetition number is used; or, in the case that the second information is separately added with CRC and the first information is not added with CRC, the second information is separately subjected to the first channel coding and the first repetition number is used, the first information is separately subjected to the second channel coding and the second repetition number is used; or, in the case that the second information is separately added with CRC and the first information is not added with CRC, the second information is separately subjected to the third channel coding and the first repetition number is used, the first information is not subjected to the third channel coding but the second repetition number is used; or, in the case that the second information is separately added with CRC and the first information is not added with CRC, the second information is not subjected to the third channel coding but the first repetition number is used, the first information is separately subjected to the third channel coding and the second repetition number is used.or, in the case that the first information, the second information, and the third information are not added with CRC, the first information, the second information, and the third information are collectively subjected to the third channel coding and adopt the same repetition number; or, in the case that the first information, the second information, and the third information are not added with CRC, the first information, the second information, and the third information are not subjected to the third channel coding but adopt the same repetition number; or, in the case that the first information and the third information are not added with CRC, the first information and the third information are collectively subjected to the third channel coding and adopt the same repetition number; or, in the case that the first information and the third information are not added with CRC, the first information and the third information are not subjected to the third channel coding but adopt the same repetition number; or, in the case that the first information, the second information, and the third information are collectively added with CRC, the first information, the second information, and the third information are collectively subjected to the third channel coding and adopt the same repetition number; or, in the case that the first information, the second information, and the third information are collectively added with CRC, the first information, the second information, and the third information are not subjected to the third channel coding but adopt the same repetition number; or, in the case that the first information and the third information are collectively added with CRC, the first information and the third information are collectively subjected to the third channel coding and adopt the same repetition number; or, in the case that the first information and the third information are collectively added with CRC, the first information and the third information are not subjected to the third channel coding but adopt the same repetition number.

[0208] It should be noted that the above-mentioned processing methods and the information carrying methods in the PRDCH can be combined. Here, a combination of a processing method and different carrying methods is shown. In the case that the end part of the PRDCH is used to carry the first information and the second information, and the non-end part is used to carry the third information, the third information is added with CRC alone, and the first information and the second information are added with CRC together; or, in the case that the end part of the PRDCH is used to carry the first information and the second information, and the non-end part is used to carry the third information, the third information is added with CRC alone, and the first information and the second information are not added with CRC; or, in the case that the end part of the PRDCH is used to carry the first information and the second information, and the non-end part is used to carry the third information, the first information, the second information and the third information are added with CRC together; or, in the case that the end part of the PRDCH is used to carry the first information and the second information, and the non-end part is used to carry the third information, the first information, the second information and the third information are not added with CRC; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information and the second information, the third information and the second information are added with CRC together, and the first information is added with CRC alone; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information and the second information, the third information and the second information are added with CRC together, and the first information is not added with CRC; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information and the second information, the first information, the second information and the third information are added with CRC together; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information and the second information, the first information, the second information and the third information are not added with CRC; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information, the third information is added with CRC alone, and the first information is added with CRC alone; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information, the third information is not added with CRC, and the first information is added with CRC alone; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information, the first information and the third information are added with CRC together; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the third information, the first information and the third information are not added with CRC; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the second information, the second information is added with CRC alone, and the first information is added with CRC alone; or, in the case that the end part of the PRDCH is used to carry the first information, and the non-end part is used to carry the second information, the second information is not added with CRC, and the first information is added with CRC alone;or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the first information and the second information jointly add CRC; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the first information and the second information do not add CRC; or, in the case that the end part of the PRDCH is used to carry the first information and the second information and the non-end part is used to carry the third information, the third information is separately subjected to the first channel coding and the first information and the second information are jointly subjected to the second channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the second information and the non-end part is used to carry the third information, the third information is separately subjected to the third channel coding and the first information and the second information are not subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the second information and the non-end part is used to carry the third information, the first information, the second information and the third information are jointly subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the second information and the non-end part is used to carry the third information, the first information, the second information and the third information are not subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information and the second information, the third information and the second information are jointly subjected to the first channel coding and the first information is separately subjected to the second channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information and the second information, the third information and the second information are jointly subjected to the third channel coding and the first information is not subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information and the second information, the first information, the second information and the third information are jointly subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information and the second information, the first information, the second information and the third information are not subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information, the third information is separately subjected to the first channel coding and the first information is separately subjected to the second channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information, the third information is not subjected to the third channel coding and the first information is separately subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information, the first information and the third information are jointly subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information, the first information and the third information are not subjected to the third channel coding;Or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the second information is separately subjected to the first channel coding and the first information is separately subjected to the second channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the second information is not subjected to the third channel coding and the first information is separately subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the first information and the second information are jointly subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the first information and the second information are not subjected to the third channel coding; or, in the case that the end part of the PRDCH is used to carry the first information and the second information and the non-end part is used to carry the third information, the third information adopts the first repetition number and the first information and the second information adopt the second repetition number; or, in the case that the end part of the PRDCH is used to carry the first information and the second information and the non-end part is used to carry the third information, the first information, the second information and the third information adopt the same repetition number; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information and the second information, the third information and the second information adopt the first repetition number and the first information adopts the second repetition number; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information and the second information, the first information, the second information and the third information adopt the same repetition number; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information, the third information adopts the first repetition number and the first information adopts the second repetition number; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the third information, the first information and the third information adopt the same repetition number; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the second information adopts the first repetition number and the first information adopts the second repetition number; or, in the case that the end part of the PRDCH is used to carry the first information and the non-end part is used to carry the second information, the first information and the second information adopt the same repetition number.

[0209] It should be noted that only one processing mode combined with different carrying modes is shown here, but in fact, two processing modes combined with different carrying modes, three processing modes combined with different carrying modes are also possible, which are enumerated one by one here, but the protection scope of the present application is not limited thereto.

[0210] FIG. 24 shows a structural block diagram of a device authorization apparatus according to an example embodiment of the present application. The apparatus can be implemented as a reader or a part of a reader by software or hardware or a combination of both, and the apparatus comprises:

[0211] The sending module 410 is configured to send a D2R authorization, and the D2R authorization is used to schedule the A-IoT device to send a PDRCH (Physical Device to Reader Channel). For details, please refer to the above step 210, which will not be repeated here.

[0212] In summary, the apparatus provided by the embodiments of the present application sends a D2R authorization from the reader to the A-IoT device to schedule the sending of the PDRCH, so that the reader can schedule the sending of the next PDRCH based on the detected current PDRCH sending situation of the A-IoT device. For example, when the A-IoT device is sending the PDRCH, the appropriate time domain resource and / or frequency domain resource for the next PDRCH sending is selected by judging the end time of the current PDRCH, and the D2R authorization can be sent to the terminal device in advance, so as to improve the utilization rate of resources and reduce the latency.

[0213] FIG. 25 shows a structural block diagram of a device authorization apparatus according to an example embodiment of the present application. The apparatus can be implemented as an A-IoT device or a part of an A-IoT device by software or hardware or a combination of both, and the apparatus comprises:

[0214] The receiving module 510 is configured to receive a D2R authorization, and the D2R authorization is used to schedule the A-IoT device to send a PDRCH. For details, please refer to the above step 310, which will not be repeated here.

[0215] In summary, the apparatus provided by the embodiments of the present application sends a D2R authorization from the reader to the A-IoT device to schedule the sending of the PDRCH, so that the reader can schedule the sending of the next PDRCH based on the detected current PDRCH sending situation of the A-IoT device. For example, when the A-IoT device is sending the PDRCH, the appropriate time domain resource and / or frequency domain resource for the next PDRCH sending is selected by judging the end time of the current PDRCH, and the D2R authorization can be sent to the terminal device in advance, so as to improve the utilization rate of resources and reduce the latency.

[0216] Next, the content of the D2R authorization is introduced.

[0217] In some embodiments, the D2R grant includes at least one of first information and second information; the first information is used to indicate time domain resources and / or frequency domain resources of the PDRCH; and the second information is used to indicate D2R grant information other than the first information.

[0218] In some embodiments, the first information and the second information are sent in the form of physical signaling or a MAC CE; or, the first information is sent in the form of physical layer signaling, and the second information is sent in the form of a MAC CE; or, the first information is sent in the form of physical layer signaling or a MAC CE. The first information and the second information being sent in the form of physical signaling or a MAC CE can be understood as the D2R grant being sent in the form of physical signaling or a MAC CE.

[0219] In summary, the device provided by the embodiments of the present application shows the specific content of the D2R grant. The main purpose of the D2R grant is to schedule the transmission of the PDRCH, and therefore, the first information indicating the time domain resources and / or the frequency domain resources is carried in the D2R grant to reasonably schedule the transmission of the PDRCH, so as to improve the utilization of resources and reduce the latency. In addition, the D2R grant (the first information and / or the second information) is sent in the form of physical layer signaling or a MAC CE, which can make the D2R grant be processed and responded faster in the A-IoT device, thereby improving the scheduling efficiency of the PDRCH.

[0220] In some embodiments, the D2R grant is carried in the PRDCH, and next, how the PRDCH carries the D2R grant (or the carrying manner of the information in the PRDCH) is introduced accordingly.

[0221] In some embodiments, the D2R grant is carried in the PRDCH, and the PRDCH includes a tail part and a non-tail part. The tail part is used to carry the first information and the second information, and the non-tail part is used to carry third information other than the D2R grant; or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information and the third information; or, the tail part is used to carry the first information, and the non-tail part is used to carry the third information; or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information.

[0222] In the first information indicating time domain resources and / or frequency domain resources is placed in the end part, the reader can determine the time domain resources and / or frequency domain resources scheduled for the A-IoT device as late as possible to avoid collision or interference with the PDRCH being transmitted. For example, as shown in FIG. 13, in the case where there is a PDRCH being transmitted on carrier 2, the reader sends a PRDCH containing a D2R grant to the A-IoT device on carrier 1, the D2R grant is used to schedule the A-IoT device to send a PDRCH on carrier 2. Since the end time of the PDRCH cannot be accurately estimated, at the end of the D2R grant, the PDRCH being transmitted on carrier 2 has not ended, which may result in failure of the PDRCH scheduling or affect the information of the PDRCH being transmitted. If the D2R grant or the first information in the D2R grant is placed in the end part of the PRDCH, the reader can determine how to schedule the PDRCH as late as possible based on the transmission of the PDRCH being transmitted on carrier 2, thereby achieving reasonable scheduling of the PDRCH.

[0223] In some embodiments, the D2R grant is carried in the PRDCH and sent, but in order to improve transmission efficiency, the PRDCH is usually sent in advance. If the carrier scheduled by the PRDCH is in an occupied state (i.e., there is a PDRCH being transmitted in the carrier) after the PRDCH is sent, if the A-IoT device performs the next PDRCH transmission based on the D2R grant carried in the PRDCH, the transmission of the PDRCH being transmitted may fail (e.g., the reader has not obtained the data transmitted by the PDRCH being transmitted). Therefore, the following design can be used.

[0224] In the optional embodiment based on FIG. 24, the sending module 410 is further configured to send at least one reference chip after the PRDCH, and the reference chip is used by the A-IoT device to determine a reference point of the PDRCH. For details, please refer to step 221 described above, which will not be repeated here.

[0225] In the optional embodiment based on FIG. 24, the sending module 410 is further configured to send at least one reference chip after the end symbol of the PRDCH (Postamble). For details, please refer to step 222 described above, which will not be repeated here.

[0226] In summary, the device provided by the embodiments of the present application transmits at least one reference chip after the PRDCH or the end symbol, so that the A-IoT device determines the reference point of the next PDRCH according to the last reference chip in the at least one reference chip, thereby avoiding collision in the case that the PRDCH ends but the previous PDRCH (or the PDRCH being transmitted) has not ended. As shown in FIG. 15, after the transmission of the PRDHC 10 containing the D2R grant ends, there is a PDRCH 11 being transmitted on the carrier 2 scheduled by the PRDHC 10. If the A-IoT device takes the end position of the PRDCH as the reference point, collision may occur between the PDRCH transmitted by the A-IoT device and the PDRCH 11 being transmitted on the carrier 2. Therefore, the reader transmits at least one reference chip 13 after the PRDCH or the end symbol 12 of the PRDHC after transmitting the PRDCH. The number of the at least one reference chip can be determined based on the estimated end of the PDRCH 11 being transmitted by the network device. The at least one reference chip 13 indicates the reference point 14 of the PDRCH scheduled by the A-IoT device to the A-IoT device. The reference point 14 can be earlier than the end point 15 of the PDRCH 11 being transmitted in the time domain, can be equal to the end point 15, or can be later than the end point 15, depending on the number determination method of the reference chip adopted by the reader and the clock accuracy of the A-IoT device. This method can avoid PDRCH transmission collision or transmission failure while improving the utilization rate of resources.

[0227] In the optional embodiment based on FIG. 25, the receiving module 510 is further configured to receive at least one reference chip after the PRDCH, and the reference chip is used to determine the reference point of the PDRCH. For details, please refer to the above step 321, which will not be repeated here.

[0228] In the optional embodiment based on FIG. 25, the receiving module 510 is further configured to receive at least one reference chip after the end symbol of the PRDCH. For details, please refer to the above step 322, which will not be repeated here.

[0229] In summary, the device provided by the embodiments of the present application transmits at least one reference chip after the PRDCH or the end symbol, so that the A-IoT device determines the reference point of the next PDRCH according to the last reference chip in the at least one reference chip, thereby avoiding collision in the case that the PRDCH ends but the previous PDRCH (or the PDRCH being transmitted) has not ended. As shown in FIG. 15, after the transmission of the PRDHC 10 containing the D2R grant ends, there is a PDRCH 11 being transmitted on the carrier 2 scheduled by the PRDHC 10. If the A-IoT device takes the end position of the PRDCH as the reference point, collision may occur between the PDRCH transmitted by the A-IoT device and the PDRCH 11 being transmitted on the carrier 2. Therefore, the reader transmits at least one reference chip 13 after the PRDCH or the end symbol 12 of the PRDHC after transmitting the PRDCH. The number of the at least one reference chip can be determined based on the estimated end of the PDRCH 11 being transmitted. The at least one reference chip 13 indicates the reference point 14 of the PDRCH scheduled by the A-IoT device to the A-IoT device. The reference point 14 can be earlier than the end point 15 of the PDRCH 11 being transmitted in the time domain, can be equal to the end point 15, or can be later than the end point 15, depending on the number determination method of the reference chip adopted by the reader and the clock accuracy of the A-IoT device. In this way, the collision of the PDRCH transmission or the transmission failure can be avoided, and the utilization rate of the resources can be improved.

[0230] In some embodiments, the PRDCH needs to perform the processing procedures of adding CRC, code block segmentation, channel coding, rate matching, code block concatenation, scrambling, modulation, layer mapping, etc. before transmission. The above processing procedures can be the same or different for the D2R grant carried in the PRDCH and the third information other than the D2R grant. Next, the processing procedures of the PRDCH including at least two of the first information, the second information and the third information are shown from various aspects.

[0231] 1. Adding CRC.

[0232] CRC is a channel coding technology for generating a short fixed number of check codes according to data, mainly used to detect or check possible errors after data transmission or storage.

[0233] In some embodiments, the third information in the PRDCH, except for the D2R grant, is separately added with CRC, the first information and the second information are jointly added with CRC; or, the third information and the second information are jointly added with CRC, the first information is separately added with CRC; or, the third information is separately added with CRC, the first information is separately added with CRC; or, the second information is separately added with CRC, the first information is separately added with CRC; or, the third information is separately added with CRC, the first information and the second information are not added with CRC; or, the third information and the second information are jointly added with CRC, the first information is not added with CRC; or, the third information is separately added with CRC, the first information is not added with CRC; or, the second information is separately added with CRC, the first information is not added with CRC; or, at least one of the first information, the second information and the third information is not added with CRC; or, at least two of the first information, the second information and the third information are jointly added with CRC.

[0234] In summary, the device provided by the embodiments of the present application adds a separate CRC or does not add a CRC to the D2R grant or the first information in the D2R grant, can support the reader to add a CRC to the second information and / or the third information first, so that the reader can determine the D2R grant or the first information as late as possible, that is, determine the time domain resource and / or the frequency domain resource of the scheduled PDRCH as late as possible, which can avoid the collision of the scheduled PDRCH with the PDRCH being transmitted or the interference to the PDRCH being transmitted. At the same time, the addition of the CRC can also improve the reliability of the PRDCH transmission.

[0235] 2. Channel coding.

[0236] Channel coding refers to the error correction coding of a digital signal to be transmitted in a channel by adding additional redundant bits to information bits. Through channel coding, the ability of data to resist various interference during transmission in a channel can be enhanced.

[0237] In some embodiments, the channel coding includes first channel coding and second channel coding. The third information in the PRDCH, except for the D2R grant, is separately performed with the first channel coding, the first information and the second information are jointly performed with the second channel coding; or, the third information and the second information are jointly performed with the first channel coding, the first information is separately performed with the second channel coding; or, the third information is separately performed with the first channel coding, the first information is separately performed with the second channel coding; or, the second information is separately performed with the first channel coding, the first information is separately performed with the second channel coding.

[0238] In some embodiments, the channel coding further comprises a third channel coding. The third information in the PRDCH other than the D2R grant is separately subjected to the third channel coding, the first information and the second information are not subjected to the third channel coding; or, the third information and the second information are jointly subjected to the third channel coding, the first information is not subjected to the third channel coding; or, the third information is separately subjected to the third channel coding, the first information is not subjected to the third channel coding; or, the second information is separately subjected to the third channel coding, the first information is not subjected to the third channel coding; or, the third information is not subjected to the third channel coding, the first information and the second information are jointly subjected to the third channel coding; or, the third information and the second information are not subjected to the third channel coding, the first information is separately subjected to the third channel coding; or, the third information is not subjected to the third channel coding, the first information is separately subjected to the third channel coding; or, the second information is not subjected to the third channel coding, the first information is separately subjected to the third channel coding; or, at least one of the first information, the second information and the third information is not subjected to the third channel coding; or, at least two of the first information, the second information and the third information are jointly subjected to the third channel coding.

[0239] In summary, the apparatus provided by the embodiments of the present application supports separately performing channel coding on the D2R grant or the first information in the D2R grant or not performing channel coding, so that the reader determines the time domain resource and / or the frequency domain resource of the scheduled PDRCH as late as possible, thereby avoiding collision of the scheduled PDRCH with the PDRCH being transmitted or causing interference to the PDRCH being transmitted. Meanwhile, using channel coding can improve the reliability of PRDCH transmission.

[0240] 3. The number of repetitions.

[0241] The repeated transmission of the PRDCH comprises information block level repeated transmission and bit level repeated transmission. The information block level repeated transmission can also be referred to as information block repetition, block level repetition, and the bit level repeated transmission can also be referred to as bit repetition, bit level repetition.

[0242] In some embodiments, the third information in the PRDCH other than the D2R grant adopts a first number of repetitions, the first information and the second information adopt a second number of repetitions; or, the third information and the second information adopt the first number of repetitions, the first information adopts the second number of repetitions; or, the third information adopts the first number of repetitions, the first information adopts the second number of repetitions; or, the second information adopts the first number of repetitions, the first information adopts the second number of repetitions.

[0243] In summary, the device provided by the embodiments of the present application supports the same repetition number or different repetition numbers of the first information in the D2R grant or the first information and other information in the D2R grant, so that the reader can determine the repetition number based on the importance of at least one of the first information, the second information and the third information and the current channel state, and in the case of poor channel state, the repetition number can be increased to improve the possibility of complete reception of information, thereby improving the reliability of PRDCH transmission.

[0244] In some embodiments, the second information includes at least one of the following: a TBS (Transport Block Size) of the PDRCH; a duration of the PDRCH; a repetition number of the PDRCH; an NDI (New Data indicator) used to indicate whether the PDRCH is retransmitted; a preamble length of the PDRCH; and an identifier of the A-IoT device.

[0245] In some embodiments, the D2R grant or the second information indicates the PDRCH retransmission through the NDI, in order to simplify the receiving and detecting process of the A-IoT device, it can be agreed that the NDI is located at the beginning of the D2R grant; or the NDI is located at the beginning of the second information. For example, in the case where the NDI uses n bits (which can be referred to as a bit field including n bits) for indication, the beginning of the D2R grant is the first n bits in the D2R grant; or the beginning of the D2R grant refers to the beginning part of the D2R grant, and the beginning part of the D2R grant is a pre-agreed m bits, where m is greater than n; or the beginning of the second information refers to the first n bits in the second information; or the beginning of the second information refers to the beginning part of the second information, and the beginning part of the second information is a pre-agreed m bits. Both n and m are positive integers.

[0246] In summary, the device provided by the embodiments of the present application further includes the second information indicating other D2R grant information, such as repetition number, duration, NDI and other information related to the transmission of the PDRCH, which is set by the reader, thereby simplifying the sending process of the PDRCH for the A-IoT device.

[0247] In some embodiments, in addition to the first information indicating the time domain resource and / or the frequency domain resource in the D2R grant, the D2R grant further includes second information used to indicate other D2R grant information. The second information can be used to indicate the duration, TBS, repetition number and the like in the PDRCH. However, the above-mentioned duration, TBS, repetition number and the like can also be determined by the A-IoT device, and in this case, there are the following several determination modes of the PDRCH.

[0248] Determination mode one: the reader indicates the TBS and the number of repetitions; determination mode two: the reader indicates the duration, the A-IoT device indicates the TBS, and the number of repetitions is determined based on the duration and the TBS; determination mode three: the reader indicates the TBS and the duration, and the number of repetitions is determined based on the TBS and the duration.

[0249] Next, the determination modes of the above PDRCHs are introduced.

[0250] Determination mode one: the reader indicates the TBS and the number of repetitions.

[0251] In the optional embodiment based on FIG. 7, the second information includes the TBS of the PDRCH and / or the number of repetitions of the PDRCH, that is, the D2R grant includes the TBS of the PDRCH and / or the number of repetitions of the PDRCH. The sending module 410 is further configured to stop sending the carrier for backscattering before the A-IoT device stops sending the PDRCH. Alternatively, the reader stops the A-IoT device from sending the PDRCH by stopping sending the carrier for backscattering.

[0252] In some embodiments, the sending module 410 is further configured to stop sending the carrier for backscattering when the first condition is met. Alternatively, the reader stops the A-IoT device from sending the PDRCH by stopping sending the carrier for backscattering when the first condition is met.

[0253] Optionally, the first condition includes at least one of the following: the reader decodes complete and correct information from the PDRCH; the reader will indicate a new D2R grant; the current time is the expected end time of the PDRCH, and the expected end time is determined based on the TBS and / or the number of repetitions.

[0254] In some embodiments, the second information includes the TBS of the PDRCH and / or the number of repetitions of the PDRCH. The receiving module 510 is further configured to stop sending the PDRCH when the carrier for backscattering is not detected. For example, when the A-IoT device does not detect the carrier during backscattering, the backscattering is stopped until the next D2R grant is received, and then the PDRCH is sent based on the D2R grant.

[0255] In some embodiments, the carrier for backscattering is stopped when the reader detects that the first condition is met.

[0256] In conclusion, the device provided by the embodiments of the present application can reduce the complexity of the A-IoT device in implementing PDRCH transmission by indicating the TBS and the number of repetitions by the reader. In addition, since the clock accuracy of the A-IoT device is not high, the reader can stop the transmission of the PDRCH by stopping the transmission of the carrier for backscattering, which enables the reader to end the transmission of the PDRCH in advance in the case of receiving complete information, reduces the amount of information of the repeated transmission of the PDRCH, and saves the overhead of the A-IoT device and the reader. In addition, the first condition for the reader to stop the transmission of the carrier is also shown, which improves the reliability of the method.

[0257] The second determination method: the reader indicates the duration, the A-IoT device indicates the TBS, and the number of repetitions is determined based on the duration and the TBS.

[0258] In some embodiments, the second information includes the duration of the PDRCH, and the TBS of the PDRCH and / or the number of repetitions of the PDRCH is determined by the A-IoT device based on the duration.

[0259] In conclusion, the device provided by the embodiments of the present application can reduce the complexity of the A-IoT device in implementing PDRCH transmission by indicating the TBS and the number of repetitions by the reader. In addition, since the clock accuracy of the A-IoT device is not high, the reader can stop the transmission of the PDRCH by stopping the transmission of the carrier for backscattering, which enables the reader to end the transmission of the PDRCH in advance in the case of receiving complete information, reduces the amount of information of the repeated transmission of the PDRCH, and saves the overhead of the A-IoT device and the reader. In addition, the first condition for the reader to stop the transmission of the carrier is also shown, which improves the reliability of the method.

[0260] The third determination method: the reader indicates the TBS and the duration, and the number of repetitions is determined based on the TBS and the duration.

[0261] In some embodiments, the second information includes the TBS of the PDRCH and the duration of the PDRCH, and the number of repetitions of the PDRCH is determined by the A-IoT device based on the TBS of the PDRCH and the duration of the PDRCH.

[0262] In conclusion, the device provided by the embodiments of the present application can reduce the complexity of the A-IoT device in implementing PDRCH transmission by indicating the TBS and the number of repetitions by the reader. In addition, since the clock accuracy of the A-IoT device is not high, the reader can stop the transmission of the PDRCH by stopping the transmission of the carrier for backscattering, which enables the reader to end the transmission of the PDRCH in advance in the case of receiving complete information, reduces the amount of information of the repeated transmission of the PDRCH, and saves the overhead of the A-IoT device and the reader. In addition, the first condition for the reader to stop the transmission of the carrier is also shown, which improves the reliability of the method.

[0263] It should be noted that the apparatus provided by the above embodiments is only used as an example to illustrate the division of the above functional modules when implementing the functions thereof. In actual applications, the above functions can be completed by different functional modules according to the needs, that is, the internal structure of the communication device is divided into different functional modules to complete all or part of the above-described functions. In addition, the apparatus and method embodiments provided by the above embodiments belong to the same concept.

[0264] FIG. 26 shows a structural schematic diagram of a communication device 600 provided by an example embodiment of the present application, which includes at least one of a receiver 601, a transmitter 602, a processor 603, a memory 604, and a bus (not shown in the figure). The communication device 600 is used to execute part or all of the steps performed by the reader described above. The receiver 601 is used to implement the receiving function, and the transmitter 602 is used to implement the sending function.

[0265] Optionally, the receiver 601 and the transmitter 602 can be implemented as a communication component, which can be a communication chip. The communication component can be referred to as a transceiver. Optionally, the receiver 601 and the transmitter 602 can be implemented as a wireless communication component and / or a wired communication component. Optionally, the wireless communication component includes a wireless communication chip and / or a radio frequency antenna. Optionally, the wired communication component includes a wired communication chip and / or a wired interface.

[0266] The processor 603 includes one or more processing cores. The processor 603 executes various functional applications and information processing by running software programs and modules. The memory 604 can be used to store computer programs executed by the processor 603. The processor 603 is used to execute the computer programs to implement each step in the above method embodiments.

[0267] In some embodiments, the memory 604 can be connected to the processor 603, the receiver 601, and the transmitter 602.

[0268] In addition, the memory 604 can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof, including but not limited to: a magnetic or optical disk, an EEPROM (Electrically-Erasable Programmable Read Only Memory), an EPROM (Erasable Programmable Read Only Memory), an SRAM (Static Random Access Memory), a ROM (Read-Only Memory), a magnetic storage, a flash memory, a PROM (Programmable Read-Only Memory).

[0269] In some embodiments, the receiver 601 receives signals / data independently, or the processor 603 controls the receiver 601 to receive signals / data, or the processor 603 requests the receiver 601 to receive signals / data, or the processor 603 cooperates with the receiver 601 to receive signals / data.

[0270] In some embodiments, the transmitter 602 transmits signals / data independently, or the processor 603 controls the transmitter 602 to transmit signals / data, or the processor 603 requests the transmitter 602 to transmit signals / data, or the processor 603 cooperates with the transmitter 602 to transmit signals / data.

[0271] For details not described in the present embodiment, reference can be made to the above embodiments, which will not be repeated here.

[0272] FIG. 27 shows a structural schematic diagram of a communication device 700 according to an example embodiment of the present application, which includes at least one of a receiver 710, a transmitter 720, a processor 730, a memory 740, and a bus (not shown in the figure). The communication device 700 can be used to perform some or all of the steps performed by the A-IoT device.

[0273] The receiver 710 is configured to implement a receiving function, and the transmitter 720 is configured to implement a transmitting function.

[0274] In some embodiments, the receiver 710 and the transmitter 720 can be implemented as one communication component, which can be a communication chip, and the communication component can be referred to as a transceiver. For example, the receiver 710 and the transmitter 720 are implemented as one wireless communication component. Optionally, the wireless communication component includes a wireless communication chip and / or a radio frequency antenna (not shown in the figure).

[0275] In some embodiments, the receiver 710 can be configured to implement the functions and steps in the above-described embodiments. Optionally, the receiver 710 can be implemented as a first receiver 713 and a second receiver 715. Optionally, the first receiver 713 and the second receiver 715 are two independent receivers, i.e., the receiver 710 includes two independent first receiver 713 and second receiver 715. Optionally, the receiver 710 is implemented as a combined receiver of the first receiver 713 and the second receiver 715.

[0276] In some embodiments, the first receiver 713 is implemented as a wake-up receiver (WUR), which can also be referred to as a low power WUR (LP-WUR), an ultra low power WUR (ULP-WUR), a low power receiver, an ultra low power receiver, a zero power receiver, a secondary receiver, etc.

[0277] In some embodiments, the second receiver 715 is implemented as a main receiver or a legacy receiver.

[0278] In some embodiments, the transmitter 720 can be configured to implement the functions and steps in the above-described embodiments. Optionally, the transmitter 720 can be implemented as a first transmitter 723 and / or a second transmitter 725. Optionally, the first transmitter 723 and the second transmitter 725 are two independent transmitters, i.e., the transmitter 720 includes two independent first transmitter 723 and second transmitter 725. Optionally, the transmitter 720 is implemented as a combined transmitter of the first transmitter 723 and the second transmitter 725.

[0279] In some embodiments, the first transmitter 723 is implemented as a backscatter transmitter, and the second transmitter 725 is implemented as a main transmitter.

[0280] In some embodiments, the processor 730 and the receiver 710 can be implemented as one module, or the processor 730 can be implemented as a part of the receiver 710.

[0281] The processor 730 includes one or more processing cores, and the processor 730 performs various functional applications and information processing by running software programs and modules.

[0282] The memory 740 can be configured to store computer programs executed by the processor 730, and the processor 730 is configured to execute the computer programs to implement various steps in the above-described method embodiments.

[0283] In some embodiments, the memory 740 can be connected to the processor 730 and the receiver 710, the transmitter 720. In addition, the memory 740 can be implemented by any type of volatile or nonvolatile storage devices or a combination thereof, including but not limited to a disk or a optical disk, an EEPROM, an EPROM, a SRAM, a ROM, a magnetic memory, a flash memory, a PROM.

[0284] In some embodiments, the receiver 710 independently receives signals / data, or the processor 730 controls the receiver 710 to receive signals / data, or the processor 730 requests the receiver 710 to receive signals / data, or the processor 730 cooperates with the receiver 710 to receive signals / data.

[0285] In some embodiments, the transmitter 720 independently transmits signals / data, or the processor 730 controls the transmitter 720 to transmit signals / data, or the processor 730 requests the transmitter 720 to transmit signals / data, or the processor 730 cooperates with the transmitter 720 to transmit signals / data.

[0286] For details not described in the present embodiment, refer to the above embodiments, which will not be repeated here.

[0287] In an example embodiment of the present application, a chip is also provided, which includes programmable logic circuit and / or program instructions, and when the chip is running on a communication device, is used to implement the device authorization method provided by each method embodiment.

[0288] In an example embodiment of the present application, a computer readable storage medium is also provided, which stores at least one program, and the at least one program is loaded and executed by a processor to implement the device authorization method provided by each method embodiment.

[0289] In an example embodiment of the present application, a computer program product is also provided, which includes computer instructions stored in a computer readable storage medium, and a processor acquires the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to implement the device authorization method provided by each method embodiment.

[0290] In an example embodiment of the present application, a computer program is also provided, which includes computer instructions stored in a computer readable storage medium, and a processor acquires the computer instructions from the computer readable storage medium, and the processor executes the computer instructions to implement the device authorization method provided by each method embodiment.

[0291] Those skilled in the art can understand that all or part of the steps of the above-mentioned embodiments can be completed by hardware, or can be instructed by programs to complete the related hardware, and the programs can be stored in a computer readable storage medium. The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0292] The above are only optional embodiments of the present application and are not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device authorization method, characterized by, The method is performed by a reader, the method comprising: sending a device-to-reader (D2R) grant, the D2R grant being used to schedule a physical device-to-reader (PDR) channel (PDRCH) transmission by an A-IoT device.

2. The method of claim 1, wherein, The D2R grant comprises at least one of first information and second information; the first information is used to indicate time domain resource and / or frequency domain resource of the PDRCH; the second information is used to indicate D2R grant information other than the first information.

3. The method of claim 2, wherein, The second information comprises at least one of: transport block size (TBS) of the PDRCH; duration of the PDRCH; number of repetitions of the PDRCH; new data indicator (NDI) used to indicate whether to retransmit the PDRCH; and identity of the A-IoT device.

4. The method according to claim 2 or 3, characterized in that, The D2R grant is carried in a physical reader-to-device (PRD) channel (PRDCH) transmission, the PRDCH comprising a tail part and a non-tail part; the tail part is used to carry the first information and the second information, and the non-tail part is used to carry third information other than the D2R grant; Or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information and the third information; Or, the tail part is used to carry the first information, and the non-tail part is used to carry the third information; Or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information.

5. The method according to any one of claims 2 to 4, characterized in that, The third information other than the D2R grant in the PRDCH performs first channel coding alone, and the first information and the second information perform second channel coding together; or, the third information and the second information perform the first channel coding together, and the first information performs the second channel coding alone; or, the third information performs the first channel coding alone, and the first information performs the second channel coding alone; or, the second information performs the first channel coding alone, and the first information performs the second channel coding alone.

6. The method according to any one of claims 2 to 4, characterized in that, The third information other than the D2R grant in the PRDCH performs third channel coding alone, and the first information and the second information do not perform the third channel coding; or, the third information and the second information perform the third channel coding together, and the first information does not perform the third channel coding; or, the third information performs the third channel coding alone, and the first information does not perform the third channel coding; or, the second information performs the third channel coding alone, and the first information does not perform the third channel coding; or, at least one of the first information, the second information and the third information does not perform the third channel coding; or, at least two of the first information, the second information and the third information perform the third channel coding together.

7. The method according to any one of claims 2 to 6, characterized in that, The third information in the PRDCH except the D2R grant separately adds a cyclic redundancy check (CRC), the first information and the second information jointly add a CRC; or, the third information and the second information jointly add a CRC, the first information separately adds a CRC; or, the third information separately adds a CRC, the first information separately adds a CRC; or, the second information separately adds a CRC, the first information separately adds a CRC; or, the third information separately adds a CRC, the first information and the second information do not add a CRC; or, the third information and the second information jointly add a CRC, the first information does not add a CRC; or, the third information separately adds a CRC, the first information does not add a CRC; or, the second information separately adds a CRC, the first information does not add a CRC; or, at least one of the first information, the second information and the third information does not add a CRC; or, at least two of the first information, the second information and the third information jointly add a CRC.

8. The method according to any one of claims 2 to 7, characterized in that, The third information in the PRDCH except the D2R grant adopts a first repetition number, the first information and the second information adopt a second repetition number; or, the third information and the second information adopt the first repetition number, the first information adopts the second repetition number; or, the third information adopts the first repetition number, the first information adopts the second repetition number; or, the second information adopts the first repetition number, the first information adopts the second repetition number.

9. The method according to any one of claims 2 to 8, characterized in that, The first information and the second information are transmitted in the form of physical layer signaling or a medium access control control element (MAC CE); or, the first information is transmitted in the form of physical layer signaling, and the second information is transmitted in the form of a MAC CE.

10. The method according to any one of claims 1 to 9, characterized in that, The method further comprises: transmitting at least one reference chip after the PRDCH, the reference chip being used by the A-IoT device to determine a reference point of the PDRCH; or, transmitting the at least one reference chip after an end symbol of the PRDCH.

11. The method according to any one of claims 3 to 10, characterized in that, The second information comprises a TBS of the PDRCH and / or a repetition number of the PDRCH, and the method further comprises: stopping transmitting a carrier for backscattering before the A-IoT device stops transmitting the PDRCH.

12. The method of claim 11, wherein, The stopping of transmitting the carrier for backscattering before the A-IoT device stops transmitting the PDRCH comprises: stopping transmitting the carrier for backscattering in a case where a first condition is met.

13. The method of claim 12, wherein, The first condition comprises at least one of: the reader decoding complete and correct information from the PDRCH; the reader indicating a new D2R grant; a current time being a predicted end time of the PDRCH, the predicted end time being determined based on the TBS and / or the repetition number.

14. The method according to any one of claims 3 to 10, characterized in that, The second information includes a duration of the PDRCH, and a TBS of the PDRCH and / or a repetition number of the PDRCH are determined by the A-IoT device based on the duration.

15. The method according to any one of claims 3 to 10, characterized in that, The second information includes a TBS of the PDRCH and a duration of the PDRCH, and a repetition number of the PDRCH is determined by the A-IoT device based on the TBS of the PDRCH and the duration of the PDRCH.

16. The method of any one of claims 3 to 15, wherein, The NDI is located at the beginning of the D2R grant; or, the NDI is located at the beginning of the second information.

17. The method of any one of claims 3 to 16, wherein, In a case where the NDI is a first bit value, the NDI is used to indicate retransmission of the PDRCH; in a case where the NDI is a second bit value, the NDI is used to indicate non-retransmission of the PDRCH. Or, in a case where the NDI of the current transmission is the same as the NDI of the last transmission, it indicates retransmission of the PDRCH; in a case where the NDI of the current transmission is different from the NDI of the last transmission, it indicates non-retransmission of the PDRCH.

18. A device authorization method, comprising: The method is performed by an A-IoT device, and the method includes: receiving a device-to-reader (D2R) grant, the D2R grant being used to schedule the A-IoT device to transmit a physical device-to-reader channel (PDRCH).

19. The method of claim 18, wherein, The D2R grant includes at least one of first information and second information; the first information is used to indicate time domain resources and / or frequency domain resources of the PDRCH; and the second information is used to indicate D2R grant information other than the first information.

20. The method of claim 19, wherein, The second information includes at least one of a transport block size (TBS) of the PDRCH, a duration of the PDRCH, a repetition number of the PDRCH, a new data indicator (NDI) used to indicate whether to retransmit the PDRCH, and an identity of the A-IoT device.

21. The method according to claim 19 or 20, characterized in that, The D2R grant is carried in a physical reader-to-device channel (PRDCH) and transmitted, the PRDCH includes a tail part and a non-tail part; the tail part is used to carry the first information and the second information, and the non-tail part is used to carry third information other than the D2R grant; Or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information and the third information; Or, the tail part is used to carry the first information, and the non-tail part is used to carry the third information; Or, the tail part is used to carry the first information, and the non-tail part is used to carry the second information.

22. The method of any one of claims 19 to 21, wherein, The third information other than the D2R grant in the PRDCH performs first channel coding alone, the first information and the second information perform second channel coding alone; or, the third information and the second information perform the first channel coding alone, and the first information performs the second channel coding alone; or, the third information performs the first channel coding alone, and the first information performs the second channel coding alone; or, the second information performs the first channel coding alone, and the first information performs the second channel coding alone.

23. The method of any one of claims 19 to 21, wherein, The third information in the PRDCH except the D2R grant performs third channel coding alone, the first information and the second information do not perform the third channel coding; or, the third information and the second information perform the third channel coding alone, the first information does not perform the third channel coding; or, the third information performs the third channel coding alone, the first information does not perform the third channel coding; or, the second information performs the third channel coding alone, the first information does not perform the third channel coding; or, at least one of the first information, the second information and the third information does not perform the third channel coding; or, at least two of the first information, the second information and the third information perform the third channel coding together.

24. The method of any one of claims 19 to 23, wherein, The third information in the PRDCH except the D2R grant adds cyclic redundancy check (CRC) alone, the first information and the second information add CRC alone; or, the third information and the second information add CRC alone, the first information adds CRC alone; or, the third information adds CRC alone, the first information adds CRC alone; or, the second information adds CRC alone, the first information adds CRC alone; or, the third information adds CRC alone, the first information and the second information do not add CRC; or, the third information and the second information add CRC alone, the first information does not add CRC; or, the third information adds CRC alone, the first information does not add CRC; or, the second information adds CRC alone, the first information does not add CRC; or, at least one of the first information, the second information and the third information does not add CRC; or, at least two of the first information, the second information and the third information add CRC together.

25. The method of any one of claims 19 to 24, wherein, The third information in the PRDCH except the D2R grant adopts a first repetition number, the first information and the second information adopt a second repetition number; or, the third information and the second information adopt the first repetition number, the first information adopts the second repetition number; or, the third information adopts the first repetition number, the first information adopts the second repetition number; or, the second information adopts the first repetition number, the first information adopts the second repetition number.

26. The method of any one of claims 19 to 25, wherein, The first information and the second information are sent in the form of physical layer signaling or medium access control control element (MAC CE); or, the first information is sent in the form of physical layer signaling, the second information is sent in the form of MAC CE.

27. The method of any one of claims 18 to 26, wherein, The method further comprises: receiving at least one reference chip after the PRDCH, the reference chip being used to determine a reference point of the PRDCH; or, receiving the at least one reference chip after an end symbol of the PRDCH.

28. The method of any one of claims 20 to 27, wherein, The second information includes a TBS of the PDRCH and / or a repetition number of the PDRCH, and the method further includes: stopping sending the PDRCH in a case where the carrier for backscattering is not detected.

29. The method of claim 28, wherein, The carrier for backscattering is stopped from being sent in a case where the reader detects that a first condition is met.

30. The method of claim 29, wherein, The first condition includes at least one of: the reader decodes complete and correct information from the PDRCH; the reader indicates a new D2R grant; a current time is a predicted end time of the PDRCH, the predicted end time being determined based on the TBS and / or the repetition number.

31. The method of any one of claims 20 to 27, wherein, The second information includes a duration of the PDRCH, and the method further includes: determining the TBS of the PDRCH and / or the repetition number of the PDRCH based on the duration.

32. The method of any one of claims 20 to 27, wherein, The second information includes a TBS of the PDRCH and a duration of the PDRCH, and the method further includes: determining the repetition number of the PDRCH based on the TBS of the PDRCH and the duration of the PDRCH.

33. The method of any one of claims 20 to 32, wherein, The NDI is located at the beginning of the D2R grant; or, the NDI is located at the beginning of the second information.

34. The method of any one of claims 20 to 33, wherein, In a case where the NDI is a first bit value, the NDI is used to indicate retransmission of the PDRCH; in a case where the NDI is a second bit value, the NDI is used to indicate non-retransmission of the PDRCH; or, in a case where the NDI of the current transmission is the same as the NDI of the last transmission, it indicates retransmission of the PDRCH; in a case where the NDI of the current transmission is different from the NDI of the last transmission, it indicates non-retransmission of the PDRCH.

35. An apparatus for device authorization, the apparatus comprising: The apparatus includes: A sending module configured to send a device-to-reader (D2R) grant, the D2R grant being used to schedule an A-IoT device to send a physical device-to-reader (PDR) channel (PDRCH).

36. An apparatus for device authorization, the apparatus comprising: The apparatus includes: A receiving module configured to receive a device-to-reader (D2R) grant, the D2R grant being used to schedule an A-IoT device to send a physical device-to-reader (PDR) channel (PDRCH).

37. A communications device, characterized by The communication device includes: a transceiver; the communication device is configured to perform the device grant method according to any one of claims 1 to 17.

38. An ambient energy Internet of Things (A-IoT) device, comprising: The A-IoT device includes: a transceiver; the A-IoT device is configured to perform the device grant method according to any one of claims 18 to 34.

39. A communications device, characterized by The communication device includes: a processor; a transceiver connected to the processor; a memory for storing executable instructions of the processor; wherein the processor is configured to load and execute the executable instructions to implement the device grant method according to any one of claims 18 to 34.

40. A computer-readable storage medium, comprising: The computer readable storage medium stores at least one program, and the at least one program is loaded and executed by a processor to implement the device grant method according to any one of claims 1 to 34.

41. A computer program product or computer program, characterised in that, The computer program product or the computer program comprises computer instructions stored in a computer readable storage medium, and a processor acquires the computer instructions from the computer readable storage medium, and executes the computer instructions to implement the device authorization method according to any one of claims 1 to 34.

42. A chip, comprising: The chip comprises programmable logic circuit and / or at least one program, and the chip is used to implement the device authorization method according to any one of claims 1 to 34 based on the programmable logic circuit and / or the at least one program.

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