Communication method and apparatus, and storage medium

Abstract

The present disclosure relates to the technical field of communications, and provides a communication method and apparatus, and a storage medium. In the method, an ambient Internet of Things device may acquire first information, and on the basis of the first information, receive a first message transmitted by a physical reader-to-device channel (PRDCH), wherein the first information is used for indicating at least one transmission resource for PRDCH transmission. By means of the method of the present disclosure, an ambient Internet of Things device can be instructed to receive a corresponding first message during PRDCH transmission.

Description

Communication methods, devices and storage media

[0001] This disclosure claims priority to Chinese Patent Application No. 202510119663.3, filed on January 24, 2025, entitled "Communication Method, Apparatus and Storage Medium", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This disclosure relates to the field of communication technology, and in particular to a communication method, apparatus and storage medium. Background Technology

[0003] Ambient Internet of Things (A-IoT) devices are low-power, low-complexity, and low-cost Internet of Things (IoT) devices.

[0004] In related technologies, environmental IoT devices need to obtain resource information that sent the PRDCH information when receiving PRDCH information. Due to the low power consumption and limited communication capabilities of A-IoT devices, there is an urgent need to provide a method for instructing A-IoT devices to receive the corresponding PRDCH information. Summary of the Invention

[0005] This disclosure provides a communication method, apparatus, and storage medium, which solves the technical problem of A-IoT devices receiving corresponding PRDCH information.

[0006] In a first aspect, embodiments of this disclosure provide a communication method applied to an environmental Internet of Things (IoT) device, the method comprising:

[0007] Obtain first information;

[0008] Based on the first information, receive the first message transmitted from the physical layer reader to the device channel PRDCH;

[0009] The first information is used to indicate at least one transmission resource for PRDCH transmission.

[0010] Secondly, embodiments of this disclosure provide a communication method applied to a reader / writer, the method comprising:

[0011] Send the first message to the environmental IoT device;

[0012] The first message is transmitted via at least one transport resource bearer transmitted through the physical layer reader indicated by the first information to the device channel PRDCH.

[0013] Thirdly, embodiments of this disclosure provide a communication device for use in environmental Internet of Things (IoT) devices, the device comprising:

[0014] The acquisition unit is used to acquire the first information;

[0015] The receiving unit is configured to receive the first message transmitted from the physical layer reader to the device channel PRDCH according to the first information;

[0016] The first information is used to indicate at least one transmission resource for PRDCH transmission.

[0017] Fourthly, embodiments of this disclosure provide a communication device for use in environmental Internet of Things (IoT) devices, including a memory, a transceiver, and a processor:

[0018] Memory is used to store computer programs; transceiver is used to send and receive data under the control of the processor; processor is used to read the computer programs from memory and perform the following operations:

[0019] Obtain first information;

[0020] Based on the first information, receive the first message transmitted from the physical layer reader to the device channel PRDCH;

[0021] The first information is used to indicate at least one transmission resource for PRDCH transmission.

[0022] Fifthly, embodiments of this disclosure provide a communication device applied to a reader / writer, the device comprising:

[0023] The sending unit is used to send the first message to the environmental IoT device;

[0024] The first message is transmitted via at least one transport resource bearer transmitted through the physical layer reader indicated by the first information to the device channel PRDCH.

[0025] Sixthly, embodiments of this disclosure provide a communication device applied to a reader / writer, including a memory, a transceiver, and a processor:

[0026] Memory is used to store computer programs; transceiver is used to send and receive data under the control of the processor; processor is used to read the computer programs from memory and perform the following operations:

[0027] Send the first message to the environmental IoT device;

[0028] The first message is transmitted via at least one transport resource bearer transmitted through the physical layer reader indicated by the first information to the device channel PRDCH.

[0029] In a seventh aspect, embodiments of this disclosure provide a non-transitory readable storage medium storing a computer program for causing a processor to perform the method provided in any of the first aspects, or the method provided in any of the second aspects.

[0030] Eighthly, embodiments of this disclosure provide a communication device that stores a computer program for causing a processor to perform the method provided in any of the first aspects, or the method provided in any of the second aspects.

[0031] In this embodiment of the disclosure, an environmental IoT device can receive a first message based on first information. The first information indicates at least one transmission resource for a PRDCH transmission. In the above process, the first information can instruct the environmental IoT device to receive the corresponding first message during the reception of a PRDCH transmission message, and indicates the timing relationship between at least one first PRDCH transmission, its corresponding PDRCH transmission, and the next PRDCH transmission. Thus, the environmental IoT device can determine and receive the first message corresponding to it, improving communication accuracy.

[0032] It should be understood that the description in the foregoing summary section is not intended to limit the key or essential features of the embodiments of this disclosure, nor is it intended to restrict the scope of this disclosure. Other features of this disclosure will become readily apparent from the following description. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this disclosure or related technologies, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 is a flowchart of the four-step random access process in related technologies;

[0035] Figure 2 is a flowchart of the two-step random access process in related technologies;

[0036] Figure 3A is a schematic diagram of an application scenario provided by an embodiment of this disclosure;

[0037] Figure 3B is a schematic diagram of the second application scenario provided by the embodiments of this disclosure;

[0038] Figure 3C is a schematic diagram of the third application scenario provided by the embodiments of this disclosure;

[0039] Figure 4 is a flowchart of a communication method provided in an embodiment of this disclosure;

[0040] Figure 5 is a flowchart of the communication method provided in an embodiment of this disclosure;

[0041] Figure 6A is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0042] Figure 6B is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0043] Figure 6C is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0044] Figure 6D is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0045] Figure 7A is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0046] Figure 7B is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0047] Figure 8A is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0048] Figure 8B is a schematic diagram of the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure;

[0049] Figure 9 is a schematic diagram of the communication device provided in an embodiment of this disclosure;

[0050] Figure 10 is a second structural schematic diagram of the communication device provided in an embodiment of this disclosure;

[0051] Figure 11 is a schematic diagram of the structure of the communication device provided in an embodiment of this disclosure;

[0052] Figure 12 is a schematic diagram of the structure of the communication device provided in the embodiment of this disclosure. Detailed Implementation

[0053] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0054] To facilitate a clear description of the technical solutions in the embodiments of this disclosure, some terms and technologies involved in the embodiments of this disclosure will be briefly introduced below:

[0055] 1. A-IoT devices (also known as environmental IoT devices)

[0056] A-IoT devices have little or no energy storage capacity and can obtain energy from environmental sources such as wind, light, pressure, and wireless signals. They are characterized by low power consumption, low cost, and low complexity.

[0057] The 3rd generation partnership project (3GPP) categorizes A-IoT devices into three types based on power consumption and performance:

[0058] Type 1: This type of A-IoT device has a peak power consumption of approximately 1μW, energy storage capabilities, and an initial sampling frequency offset (SFO) as high as 10X ppm. It lacks signal amplification capabilities in both reader-to-device (R2D) signal reception and device-to-reader (D2R) signal transmission. The device's uplink transmission achieves D2R signal (i.e., uplink signal) transmission by backscattering an externally provided carrier signal.

[0059] Type 2: This type of A-IoT device has a peak power consumption of ≤ several hundred μW, energy storage capabilities, and an initial SFO of up to 10X ppm; it also has signal amplification capabilities during R2D signal reception and / or D2R signal transmission. The device's uplink transmission achieves D2R signal (i.e., uplink signal) transmission by backscattering an externally provided carrier signal.

[0060] Type 3: This type of A-IoT device has a peak power consumption of ≤ several hundred μW, energy storage capabilities, and an initial SFO of up to 10X ppm; it also has signal amplification capabilities during R2D signal reception and / or D2R signal transmission. Uplink transmission is achieved by generating D2R signals internally within the device.

[0061] 2. Backscatter communication

[0062] A backscatter communication system consists of an excitation signal source and a signal reflection device. It typically comprises a reader and a reflective tag. The reader generates a radio frequency (RF) signal (the excitation signal), and the reflective tag is a device that reflects the excitation signal. The reader sends the RF signal to the reflective tag; this signal reaches the antenna surface of the tag and forms a reflected echo, i.e., the backscatter signal. By changing the load impedance of the tag's antenna, information is modulated into the backscatter signal. Specifically, when the reflection coefficient is configured as the first reflection coefficient, the energy of the RF signal is completely absorbed by the tag's antenna; when configured as the second reflection coefficient, the RF signal is completely reflected by the tag's antenna; and when configured as the third reflection coefficient, the energy of the RF signal is partially absorbed and partially reflected.

[0063] 3. Random access and resource configuration

[0064] In New Radio (NR) systems, the base station assigns a unique identifier to user equipment (UE) through a random access procedure, and also identifies which UEs are initiating random access. The random access procedure can be divided into the following two categories:

[0065] (1) 4-step random access process

[0066] As shown in Figure 1, the four-step random access process includes the following steps: ① The UE sends a preamble sequence, i.e., message (Msg)1, to the base station on the Physical Random Access Channel (PRACH); ② The UE receives a random access response (RAR) message, i.e., Msg2, from the base station on the Physical Downlink Control Channel (PDCCH) / Physical Downlink Shared Channel (PDSCH); ③ The UE sends message 3, i.e., Msg3, to the base station on the Physical Uplink Shared Channel (PUSCH); ④ The UE receives a contention resolution message, i.e., Msg4, from the base station on the PDSCH channel.

[0067] Before initiating the random access procedure, the UE obtains parameter information such as the set of synchronization signal (SS) / physical broadcast channel (PBCH) block (SSB) indices, physical layer time and frequency resources, random access preamble sequence format, and random access preamble sequence set through system broadcast messages. Based on the obtained parameter information, the UE generates a random access preamble sequence and initiates random access on the corresponding physical layer random access time and frequency resources.

[0068] The base station detects the Physical Random Access Channel (PRACH). If the base station detects a preamble sequence, it sends a corresponding RAR message on the PDCCH / PDSCH. After sending the random access preamble sequence, the UE checks for RAR messages sent on the downlink PDCCH / PDSCH within a RAR time window. If a corresponding RAR message is detected, it indicates that the random access preamble sequence sent by the UE was detected by the base station. This RAR message also contains the UE's uplink timing advance adjustment amount. Based on this adjustment amount, the UE can obtain uplink synchronization and then send an uplink scheduling request (SR) message for subsequent data transmission.

[0069] (2) Two-step random access process

[0070] As shown in Figure 2, the two-step random access process includes the following steps: ① The UE sends message 1, which contains uplink data in addition to the random access preamble sequence; ② The base station sends message 2, which contains the random access preamble identifier and timing advance command (TAC), as well as the UE identifier (ID) or cell-radio network temporary identifier (C-RNTI) used for contention resolution.

[0071] In Long Term Evolution (LTE) and NR, the configuration of PRACH time-domain resources is determined by looking up a predefined configuration table. For each configuration index, the table defines the period, system frame number, subframe / slot number, start symbol index within a slot, and the number of random access occasions (ROs). There are 256 configurable indices, notified by 8 bits of signaling in System Information Block (SIB) 1. The number of different RACH frequency-domain resources used for frequency division multiplexing on the same time-domain resources is 1, 2, 4, or 8, and this value is notified by 2 bits of signaling in SIB 1.

[0072] 4. Tags (which can be understood as a form of presentation for environmental IoT devices)

[0073] Tags, also known as electronic tags, smart tags, radio frequency tags, transponders, or data carriers, typically consist of coupling elements and chips. Each tag has a unique identifier, such as an electronic code. In some scenarios, tags can be attached to objects to identify them.

[0074] 5. Reader / writer

[0075] A reader, also known as a reading device, scanner, read head, communicator, or reader, is typically used to read (and sometimes write) tag information. Readers can be handheld or stationary devices.

[0076] 6. Other terms

[0077] In this disclosure, the term "and / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0078] In this disclosure, the term "at least one" refers to one or more items, and "more than one" refers to two or more items. Other quantifiers are similar. For example, at least one of a, b, or c can be represented as: a, b, c, ab, ac, bc, or abc, where a, b, and c can be a single item or multiple items.

[0079] The terms "first," "second," etc., used in the embodiments of this disclosure are for illustrative purposes and to distinguish the objects being described. They do not indicate any order or limit on the number of objects in the embodiments of this disclosure, and cannot constitute any limitation on the embodiments of this disclosure. For example, the use of terms such as "first random access signal" and "second random access signal" is only to distinguish different random access signals, and does not indicate any difference in the size, priority, or importance of the two random access signals.

[0080] Figure 3A is a schematic diagram of an application scenario provided by an embodiment of this disclosure. As shown in Figure 3A, it includes a reader / writer and an environmental IoT device. The reader / writer can send environmental IoT data or signals to the environmental IoT device; the environmental IoT device receives the environmental IoT data and signals sent by the reader / writer and sends a corresponding response signal; the reader / writer can receive the response signal sent by the environmental IoT device.

[0081] Figure 3B is a schematic diagram of the second application scenario provided by the embodiments of this disclosure. As shown in Figure 3B, it includes a network device, a reader / writer, and an environmental IoT device. The reader / writer can send environmental IoT device data or signals to the environmental IoT device; the environmental IoT device receives the environmental IoT device data or signals sent by the reader / writer and sends a corresponding response signal; the reader / writer can receive the response signal sent by the environmental IoT device; the network device and the reader / writer can communicate with each other.

[0082] Figure 3C is a schematic diagram of the third application scenario provided by the embodiments of this disclosure. As shown in Figure 3C, it includes a terminal device and an environmental IoT device. The terminal device can send environmental IoT data or signals to the environmental IoT device; the environmental IoT device can receive the environmental IoT data or signals sent by the terminal device and send a corresponding response signal; the terminal device can receive the response signal sent by the environmental IoT device.

[0083] It should be noted that the above application scenarios and the number of devices in each application scenario are merely examples. For instance, the number of environmental IoT devices can also be other values. This disclosure does not limit the application scenarios or the number of devices in each application scenario.

[0084] The technical solutions provided in this disclosure can be applied to a variety of systems. For example, applicable systems may include LTE systems, LTE frequency division duplex (FDD) systems, LTE time division duplex (TDD) systems, long term evolution advanced (LTE-A) systems, universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) systems, 5G NR systems and their evolved communication systems, and 6G (sixth generation mobile communication technology) systems. These systems may include terminals and network equipment. The systems may also include a core network component, such as evolved packet core (EPC) and 5G core network (5GC).

[0085] The network device involved in this disclosure can be a base station, which may include multiple cells providing services to the UE. Depending on the application, the base station may also be called an access point, or a device in the access network that communicates with the wireless UE through one or more sectors on the air interface, or other names. The network device can be used to exchange received air frames with Internet Protocol (IP) packets, acting as a router between the wireless UE and the rest of the access network, where the rest of the access network may include an Internet Protocol (IP) communication network. The network device can also coordinate the attribute management of the air interface. For example, the network device involved in this disclosure can be an evolved Node B (eNB or e-NodeB) in an LTE system, a 5G base station (gNB) in a 5G network architecture (next generation system), or a home evolved node B (HeNB), relay node, femto, pico, network testing equipment, etc., and is not limited in this disclosure. In some network architectures, network devices may include centralized unit (CU) nodes and distributed unit (DU) nodes, which may also be geographically separated.

[0086] The UE involved in the embodiments of this disclosure can be a device that provides voice and / or data connectivity to a user, a handheld device with wireless connectivity, or other processing devices connected to a wireless modem. The UE can also be referred to as a terminal. A wireless terminal can be a USB storage device, other personal computer memory devices, and a dongle. It can also communicate with one or more core networks (CNs) via a radio access network (RAN). A wireless terminal can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a computer with a mobile terminal. For example, it can be a portable, pocket-sized, handheld, computer-embedded, or vehicle-mounted mobile device that exchanges voice and / or data with the radio access network. Examples include personal communication service (PCS) phones, cordless phones, session initiated protocol (SIP) phones, wireless local loop (WLL) stations, personal digital assistants (PDAs), personal computers, tablets, machine-type communication (MTC) terminals, and other devices. Wireless terminals may also be referred to as systems, subscriber units, subscriber stations, mobile stations, mobile devices, remote stations, access points, remote terminals, access terminals, user terminals, user agents, user devices, and wireless access devices and routers / modems that meet the limitations of this definition, but are not limited in the embodiments disclosed herein.

[0087] In the embodiments disclosed herein, terms such as "message," "signal," "signaling," and "information" can be used interchangeably.

[0088] When environmental IoT devices need to transmit data, the reader first needs to obtain the device ID of the environmental IoT device through random access. Random access is initiated by the base station or terminal device. The environmental IoT device initiates random access on the resources used for random access through a contention mechanism of time slot ALOHA (a wireless communication protocol), for example, Msg1. For the environmental IoT device that successfully competes for Msg1, the base station sends a response message via Msg2. After receiving the response message from Msg2, the environmental IoT device performs Msg3 transmission on the subsequent Msg3 resource, thus completing the random access process.

[0089] Unlike LTE and NR random access technologies, environmental IoT devices have limited communication capabilities due to their low power consumption. For example, during the random access process initiated by an environmental IoT device, after sending a random access message (Msg1) to the reading device, the environmental IoT device needs to obtain the PRDCH channel information where it receives the random access response (Msg2) message sent by the reading device. Alternatively, the environmental IoT device needs to obtain the transmission resource information of the PRDCH carrying the scheduling information of PRDCH and / or PDRCH. This ensures that the A-IoT device can accurately receive the random access response (Msg2) message or accurately schedule the PRDCH and / or PDRCH.

[0090] This disclosure provides a communication method, apparatus, and storage medium. The method of this disclosure can instruct an environmental IoT device to receive a corresponding Msg2 message or a message transmitted via PRDCH during random access. The method and apparatus are based on the same concept, and since the principles by which the method and apparatus solve the problem are similar, their implementations can be referred to interchangeably; repeated details will not be repeated.

[0091] Figure 4 is a flowchart of a communication method provided in an embodiment of this disclosure. As shown in Figure 4, the method includes:

[0092] S401, Obtain first information.

[0093] The first information is used to indicate at least one transmission resource for the Physical Reader To Device Channel (PRDCH) transmission.

[0094] For example, the first information can be obtained by the environmental IoT device from the reader, that is, the environmental IoT device receives the first information sent by the reader.

[0095] S402. Receive the first message transmitted by PRDCH according to the first information.

[0096] It should be noted that the execution entity of this embodiment can be an environmental IoT device or a communication device installed in the environmental IoT device. The communication device can be implemented by software or by a combination of software and hardware. The environmental IoT device described in this embodiment can also be replaced by an A-IoT device.

[0097] In one possible implementation, the first message includes at least one of the following: a response message corresponding to the second message; a message for scheduling the third message; and a message for triggering the fourth message.

[0098] The second message is at least one of the following: Msg1 message of the random access procedure, or random access message, or message transmitted by the environmental IoT device from the physical layer device to the reader channel (PDRCH).

[0099] The third message is Msg3 of the random access procedure, or at least one of the messages transmitted in the PDRCH;

[0100] The fourth message is the PDRCH transmission message sent by the environmental IoT device.

[0101] For example, the second message is Msg1, the first message can be Msg2, the third message can be Msg3, and the fourth message can be a PDRCH transmission message sent by the IoT device in the subsequent environment.

[0102] In one possible implementation, receiving a first message based on first information includes: determining a first transmission resource from at least one transmission resource indicated by the first information, and receiving the first message on the first transmission resource; or, receiving the first message on the transmission resource indicated by the first information.

[0103] For example, an environmental IoT device can sequentially detect the transmission resources of at least one PRDCH transmission message. When the detection determines that the transmission resource of the PRDCH transmission message is the transmission resource corresponding to the environmental IoT device for receiving the first message, the device receives the first message on the transmission resource of the PRDCH transmission message.

[0104] For example, the first information may indicate a transmission resource, and on the transmission resource indicated by the first information, the environmental IoT device receives the first message; the first information may also indicate multiple transmission resources, each transmission resource corresponding to an environmental IoT device, and the environmental IoT device that receives the first information needs to determine the transmission resource corresponding to itself from the multiple transmission resources, and at this time the environmental IoT device can receive the first message based on the determined transmission resource.

[0105] In one possible implementation, the method further includes: obtaining first association information; then determining a first transmission resource from at least one transmission resource indicated by the first information, including: determining the first transmission resource from at least one transmission resource indicated by the first information based on the first association information.

[0106] For example, an environmental IoT device can determine a first transmission resource for receiving a first message from the transmission resources of at least one PRDCH transmission message, based on at least one of the indication information, identification information, or first association information corresponding to the transmission resource of at least one PRDCH transmission message. In this way, the environmental IoT device can receive the first message corresponding to the environmental IoT device on the first transmission resource.

[0107] In one possible implementation, the first information and / or the first associated information is obtained by at least one of the following methods: paging message; fifth message transmitted via PRDCH; or, a protocol preset method.

[0108] For example, when the first information and / or the first associated information is obtained through a paging message, the environmental IoT device can receive a paging message sent by a reader / writer, the paging message including the first information and / or the first associated information.

[0109] For example, when the first information and / or the first associated information is obtained through the fifth message transmitted via PRDCH, the environmental IoT device can receive the fifth message transmitted via PRDCH sent by the reader / writer. The fifth message transmitted via PRDCH includes the first information and / or the first associated information. The message transmitted via PRDCH can be information carried by PRDCH in control information and / or data information, or it can be information transmitted in the preamble associated with PRDCH.

[0110] In one possible implementation, the first association information includes at least one of the following: the association between the transmission resources of the PRDCH where the first message is located and the transmission resources of at least one second message; the association between the transmission resources of the PRDCH where the first message is located and environmental IoT devices; the association between the transmission resources of the PRDCH where the first message is located and a group of environmental IoT devices; or, the association between the transmission resources of the PRDCH where the first message is located and the channel where the trigger message is located or the signal associated with the channel where the trigger message is located.

[0111] In one possible implementation, the trigger message includes at least one of the following: a paging message; or, the channel on which the trigger message is located contains channel information of the PRDCH received by the environmental IoT device.

[0112] For example, the association between the transport resources of the PRDCH containing the first message and the transport resources of at least one second message may include at least one of the following:

[0113] The relationship between the ordering of the transmission resources of the PRDCH containing the first message and the time-domain transmission resources of at least one second message; the relationship between the ordering of the transmission resources of the PRDCH containing the first message and the frequency-domain transmission resources of at least one second message; and the relationship between the ordering of the transmission resources of the PRDCH containing the first message and the code-domain transmission resources of at least one second message.

[0114] For example, there is a one-to-one correspondence between the transmission resources of the PRDCH containing the first message and the transmission resources of at least one second message, or there is a one-to-many relationship between the transmission resources of the PRDCH containing the first message and the transmission resources of at least one second message.

[0115] For example, the association between the transmission resources of the PRDCH where the first message is located and the environmental IoT device may include at least one of the following: the association between the transmission resources of the PRDCH where the first message is located and the identification information of the environmental IoT device; the association between the transmission resources of the PRDCH where the first message is located and the relevant information of the identification information of the environmental IoT device.

[0116] For example, an environmental IoT device can obtain the resource information corresponding to the Msg2 message through a specific operation 1 based on the device identifier. The device identifier can be a randomly generated identifier for the environmental IoT device, or it can be a unique identifier specific to the device.

[0117] For example, the association between the transmission resources of the PRDCH where the first message is located and the environmental IoT device group may include at least one of the following: the association between the transmission resources of the PRDCH where the first message is located and the identification information of the environmental IoT device group; the association between the transmission resources of the PRDCH where the first message is located and the relevant information of the identification information of the environmental IoT device group.

[0118] For example, the association between the transmission resources of the PRDCH where the first message is located and the channel where the trigger message is located or the signal associated with the channel where the trigger message is located may include at least one of the following: the association between the transmission resources of the PRDCH where the first message is located and the identification information of the channel where the trigger message is located; the association between the transmission resources of the PRDCH where the first message is located and the identification information of the signal associated with the channel where the trigger message is located.

[0119] For example, there is a one-to-one correspondence between the transmission resources of the PRDCH where the first message is located and the identification information of at least one paging message, or there is a one-to-many relationship between the transmission resources of the PRDCH where the first message is located and the identification information of at least one paging message.

[0120] In one possible implementation, the first information is used to indicate at least one of the following: time-domain resource information of at least one PRDCH transmission; frequency-domain resource information of at least one PRDCH transmission; or code-domain resource information of at least one PRDCH transmission.

[0121] In one possible implementation, the time-domain resource information of at least one PRDCH transmission includes at least one of the following: the start time of at least one PRDCH transmission; a first time offset between the start time of at least one PRDCH transmission and a first reference time; a second time offset between the start time of the first PRDCH transmission and a second reference time; a third time offset between the end time of at least one PRDCH transmission and the first reference time; the duration of at least one PRDCH transmission; the total transmission duration of at least one PRDCH transmission; the end time of at least one PRDCH transmission; the end time of the last PRDCH transmission in at least one PRDCH transmission; the time interval between two adjacent PRDCH transmissions; the number of messages in at least one PRDCH transmission; or, transmission waveform-related information of at least one PRDCH transmission.

[0122] For example, the start time of at least one PRDCH transmission can be a specific time point or a list of times, or it can be a period and its offset value, etc.

[0123] For example, the duration of at least one PRDCH transmission, the total transmission duration of at least one PRDCH transmission, and the time interval can be absolute time, such as milliseconds, seconds, time slots, or Transmission Time Interval (TTI). It can also be the information length or transmission length of the first message, and the unit can be: chip, information bit, Orthogonal Frequency Division Multiplexing (OFDM) symbol, coded bit or chip, transport block size, or it can be indicated by an end marker, such as a postamble.

[0124] In one possible implementation, the first reference time includes at least one of the following: a common reference time for at least one PRDCH transmission; or, a dedicated reference time for a PRDCH transmission. The second reference time includes at least one of the following: a common reference time for at least one PRDCH transmission; or, a dedicated reference time for a PRDCH transmission.

[0125] In one possible implementation, the common reference time for at least one PRDCH transmission includes at least one of the following: the start time of the transmission of the sixth message of the PRDCH transmission; the end time of the transmission of the sixth message of the PRDCH transmission; the start time of the transmission of the paging message; the end time of the transmission of the paging message; the start time of the first time domain resource corresponding to the second message; or, the end time of the last time domain resource corresponding to the second message; wherein the sixth message is used to trigger random access or is a scheduling message carrying a third message.

[0126] It should be noted that "sixth" and "fifth" in the sixth and fifth messages transmitted by PRDCH are not message numbers, nor do they indicate which message is being transmitted by PRDCH. They are only used to distinguish the messages transmitted by PRDCH. The sixth and fifth messages may be the same message or they may be different messages.

[0127] For example, the first messages corresponding to the second messages that are multiplexed in the same time domain (e.g., frequency division and / or code division) have a common reference time.

[0128] In one possible implementation, the dedicated reference time includes at least one of the following: the start time of transmission of a message transmitted on one or a specific PRDCH preceding the seventh message transmitted on the first PRDCH; the end time of transmission of a message transmitted on one or a specific PRDCH preceding the seventh message transmitted on the first PRDCH; the start time of the time domain resource for transmitting the second message; the end time of the time domain resource for transmitting the second message; the start time of transmission of the first PDRCH where the second message is transmitted; the end time of transmission of the first PDRCH where the second message is transmitted; the end time of transmission of the eighth message transmitted on the second PRDCH; or, the end time of transmission of the eighth message transmitted on the second PRDCH; wherein the first PRDCH is the channel carrying the first message, and the first PDRCH is the channel carrying the second message.

[0129] For example, the start or end time of a message in a PRDCH transmission preceding the seventh message of the first PRDCH transmission, where the first PRDCH transmission is not the first PRDCH transmission among at least one PRDCH transmissions. The start or end time of a message in a specific PRDCH transmission preceding the seventh message of the first PRDCH transmission, where the first PRDCH transmission is any one of at least one PRDCH transmissions.

[0130] For example, when at least one PRDCH transmission is used to transmit at least one seventh message, in the at least one PRDCH transmission, the first PRDCH transmission is used to transmit the first message. The at least one seventh message includes the first message.

[0131] For example, the second PRDCH transmission is a transmission preceding the first PRDCH. The eighth message is the transmission information for the first PDRCH where the second message is located.

[0132] For example, the first message corresponding to the second message in different time domains can have a dedicated reference time.

[0133] When at least one first PRDCH transmission exists in the same time period, the relationship between at least one first PRDCH transmission and the first threshold and the second threshold can also be defined.

[0134] In one possible implementation, the first time offset satisfies at least one of the following conditions: the first time offset corresponding to a preset PRDCH transmission in at least one PRDCH transmission is greater than or equal to a first threshold; or, the first time offset corresponding to the first PRDCH transmission in at least one PRDCH transmission is greater than or equal to the first threshold; or, the first time offset corresponding to the last PRDCH transmission in at least one PRDCH transmission is greater than or equal to the first threshold; or, the first time offset corresponding to at least one PRDCH transmission is greater than or equal to the first threshold; wherein, the first threshold is the minimum time interval between a PDRCH transmission and its corresponding PRDCH transmission.

[0135] In one possible implementation, the second time offset satisfies the following condition: the second time offset is greater than or equal to a first threshold; wherein the first threshold is the minimum time interval between a PDRCH transmission and the corresponding PDRCH transmission.

[0136] In one possible implementation, the third time offset satisfies at least one of the following conditions: the third time offset corresponding to the preset PRDCH transmission in at least one PRDCH transmission is less than or equal to the second threshold; or, the third time offset corresponding to the first PRDCH transmission in at least one PRDCH transmission is less than or equal to the second threshold; or, the third time offset corresponding to the last PRDCH transmission in at least one PRDCH transmission is less than or equal to the second threshold; or, the third time offset corresponding to at least one PRDCH transmission is less than or equal to the second threshold; wherein, the second threshold is the maximum time interval between the PDRCH transmission and the corresponding PRDCH transmission.

[0137] For example, the preset PRDCH transmission in at least one PRDCH transmission can be any one of the at least one PRDCH transmissions.

[0138] In one possible implementation, the frequency domain resource information of at least one PRDCH transmission includes at least one of the following: the start position of the frequency domain resource of at least one PRDCH transmission; the number of frequency domain resources or channels of at least one PRDCH transmission; the end position of the frequency domain resource of at least one PRDCH transmission; the center frequency corresponding to the frequency domain resource of at least one PRDCH transmission; the start frequency corresponding to the frequency domain resource of at least one PRDCH transmission; the end frequency corresponding to the frequency domain resource of at least one PRDCH transmission; the identifier of the frequency domain resource of at least one PRDCH transmission; the identifier of the channel of the frequency domain resource of at least one PRDCH transmission; the index value of the frequency domain resource of at least one PRDCH transmission; the index value of the channel of the frequency domain resource of at least one PRDCH transmission; the offset value between the frequency domain resource of at least one PRDCH transmission and the reference frequency of a specific channel; the offset value between the frequency domain resource of at least one PRDCH transmission and the reference frequency of a specific signal; the frequency shift factor of at least one PRDCH transmission; or, relevant parameters of the transmission bandwidth of at least one PRDCH transmission.

[0139] For example, the transmission bandwidth related parameters of at least one PRDCH transmission can be at least one frequency factor, or the channel bandwidth related parameters of at least one PRDCH transmission message, etc.

[0140] In one possible implementation, a particular channel includes at least one of the following: a first PDRCH; a second PRDCH; or a third PRDCH, wherein the third PRDCH is used to carry paging messages.

[0141] For example, if the paging message and the eighth message are the same message, the second PRDCH and the third PRDCH can be the same PRDCH.

[0142] In one possible implementation, the reference frequency point of a specific channel includes at least one of the following: a center frequency point; a starting frequency point; or a termination frequency point.

[0143] For example, the reference frequency of a specific channel can be the center frequency of the first PRDCH, or the starting frequency of the first PRDCH, or the ending frequency of the first PRDCH.

[0144] In one possible implementation, the reference frequency of a specific signal includes at least one of the following: the frequency of the carrier waveform; the frequency of the preamble associated with the PRDCH; or the frequency of the preamble associated with the PDRCH.

[0145] In one possible implementation, the code domain resource information transmitted by at least one PRDCH includes at least one of the following: a codeword sequence corresponding to at least one PRDCH transmission; or, codeword sequence related information corresponding to at least one PRDCH transmission.

[0146] For example, the code field resource information of at least one PRDCH transmission message can be the sequence code of at least one PRDCH transmission message, the index code of at least one PRDCH transmission message, etc.

[0147] In this embodiment, the environmental IoT device can acquire first information and receive a first message based on the first information. The first information is used to indicate at least one transmission resource for PRDCH transmission. Further, the environmental IoT device can also determine a first transmission resource from the at least one transmission resource indicated by the first information based on first association information, and receive the first message on the first transmission resource. In the above process, during the reception of the PRDCH transmission message, the first information instructs the environmental IoT device to receive the corresponding first message and indicates the timing relationship between at least one first PRDCH transmission, the PDRCH transmission, and the next PRDCH transmission. Thus, the environmental IoT device can determine the first message corresponding to the environmental IoT device and receive the first message, improving the accuracy of communication.

[0148] Based on any of the above embodiments, and in conjunction with Figure 5, the process of interaction between the environmental IoT device and the reader / writer will be explained.

[0149] Figure 5 is a flowchart of a communication method provided in an embodiment of this disclosure. As shown in Figure 5, the method includes:

[0150] S501, Environmental IoT devices acquire first information.

[0151] Optionally, environmental IoT devices can also acquire primary association information.

[0152] The first information and / or the first associated information can be sent by the reader to the environmental IoT device, or it can be obtained through a preset protocol.

[0153] The reader can send first information and / or first association information to environmental IoT devices via paging messages or PRDCH-transmitted messages.

[0154] S502, the reader sends the first message to the environmental IoT device.

[0155] In other words, the IoT device receives the first message sent by the reader / writer.

[0156] The first message is transmitted via at least one transport resource bearer transmitted through the PRDCH indicated by the first information.

[0157] It should be noted that the process of S502 can be found in S401, and will not be repeated here.

[0158] In this embodiment of the disclosure, the environmental IoT device acquires first information and receives a first message sent by the reader / writer based on the first information. During the above process, the IoT device is instructed to receive the corresponding first message while receiving a message transmitted via PRDCH, and the timing relationship between at least one first PRDCH transmission, a PDRCH transmission, and the next PRDCH transmission is indicated. In this way, the environmental IoT device can determine the first message corresponding to the IoT device and receive the first message, improving the accuracy of communication.

[0159] Based on any of the above embodiments, and in conjunction with Figures 6A-6D, the process of obtaining the first message (Embodiment 1) corresponding to the IoT device in the first information acquisition environment will be described.

[0160] The environmental IoT device receives first information and, based on the first information, receives a first message. The first information is carried through at least one method, such as a paging message or a message transmitted via PRDCH. The first information can also be obtained through a predefined protocol method.

[0161] Environmental IoT devices receive paging messages and / or messages transmitted via PRDCH to obtain first information, including at least one of the following:

[0162] Scenario 1: Paging message, which can be used as a query signal, includes the first information.

[0163] Case 2: The message transmitted by PRDCH carrying the first information can also be used as a query signal.

[0164] The paging message and the PRDCH message carrying the first information are different PRDCH messages. Alternatively, the paging message and the PRDCH message carrying the first information can be the same PRDCH message.

[0165] The first information includes at least one of the following: time-domain resource information of at least one PRDCH transmission; frequency-domain resource information of at least one PRDCH transmission; or code-domain resource information of at least one PRDCH transmission.

[0166] For example, the message transmitted by PRDCH can be information carried in the control information and / or data information of PRDCH, or it can be information transmitted in the preamble associated with PRDCH.

[0167] Figure 6A is a schematic diagram illustrating the determination of transmission resources for at least one PRDCH transmission message according to an embodiment of this disclosure. As shown in Figure 6A, the time-domain resource information of at least one PRDCH transmission message includes, but is not limited to, at least one of the following:

[0168] Case 1: The time offset between the start time of the PRDCH transmission phase or the start time of the first PRDCH transmission and the common reference time; the end identifier of at least one PRDCH transmission message; the time interval between two adjacent PRDCH transmissions.

[0169] Case 2: The time offset between the start time of the PRDCH transmission phase or the start time of the first PRDCH transmission and the common reference time; the duration of at least one PRDCH transmission; the time interval between two adjacent PRDCH transmissions.

[0170] Case 3: The time offset between the start time of the PRDCH transmission phase or the start time of the first PRDCH transmission and the common reference time; the total transmission duration of at least one PRDCH transmission.

[0171] Case 4: The time offset between the start time of the PRDCH transmission phase or the start time of the first PRDCH transmission and the common reference time; the number of at least one PRDCH transmission messages; the duration of at least one PRDCH transmission / the end marker of at least one PRDCH transmission message.

[0172] Case 5: The time offset between the start time of the PRDCH transmission phase or the start time of the first PRDCH transmission and the common reference time; the number of at least one PRDCH transmission messages; the duration of at least one PRDCH transmission / the end marker of at least one PRDCH transmission message; the time interval between two adjacent PRDCH transmissions.

[0173] Case 6: The time offset between the start time of the PRDCH transmission phase or the start time of the first PRDCH transmission and the common reference time; the duration of at least one PRDCH transmission / the end marker of at least one PRDCH transmission message; a list of time intervals between different PRDCH transmissions in the PRDCH transmission phase.

[0174] Case 7: The time offset between the start time of the PRDCH transmission phase or the start time of the first PRDCH transmission and the common reference time; the number of at least one PRDCH transmission message.

[0175] For example, the time interval between two adjacent PRDCH transmissions can be the time interval between the end time of a PRDCH transmission and the start time of the next PRDCH transmission, or the time interval between the start time of a PRDCH transmission and the start time of the next PRDCH transmission.

[0176] For example, the total transmission duration of at least one PRDCH transmission can be explicitly configured or implicitly configured. For instance, if an environmental IoT device does not detect a PRDCH transmission message within a preset duration after the PRDCH transmission message reception ends, it considers the PRDCH transmission message phase to have ended.

[0177] For example, the number of messages transmitted by at least one PRDCH may be the same as or different from the number of the second messages.

[0178] For example, in the list of time intervals between different PRDCH transmissions in the PRDCH transmission phase, each time interval can be configured independently.

[0179] The time offset must satisfy at least one of the following: The first time offset corresponding to a preset PRDCH transmission in at least one PRDCH transmission is greater than or equal to a first threshold; or, the first time offset corresponding to the first PRDCH transmission in at least one PRDCH transmission is greater than or equal to the first threshold; or, the first time offset corresponding to the last PRDCH transmission in at least one PRDCH transmission is greater than or equal to the first threshold; or, the first time offset corresponding to at least one PRDCH transmission is greater than or equal to the first threshold; the third time offset corresponding to a preset PRDCH transmission in at least one PRDCH transmission is less than or equal to a second threshold; or, the third time offset corresponding to the first PRDCH transmission in at least one PRDCH transmission is less than or equal to the second threshold; or, the third time offset corresponding to the last PRDCH transmission in at least one PRDCH transmission is less than or equal to the second threshold; or, the third time offset corresponding to at least one PRDCH transmission is less than or equal to the second threshold; wherein, the first threshold is the minimum time interval between a PRDCH transmission and the next PRDCH transmission; the third time offset is the time offset between the end time of the PRDCH transmission and the reference time; and the second threshold is the maximum time interval between a PRDCH transmission and the next PRDCH transmission.

[0180] The frequency domain resource information of at least one PRDCH transmission includes at least one of the following: the index value K1 of the frequency domain resource of at least one PRDCH transmission; the channel index value K2 of the frequency domain resource of at least one PRDCH transmission; the offset value between the frequency domain resource of at least one PRDCH transmission and the reference frequency point of a specific channel; the frequency shift factor K3 of at least one PRDCH transmission; the center frequency point F1 corresponding to the frequency domain resource of at least one PRDCH transmission; and the transmission channel bandwidth BW#1 of at least one PRDCH transmission.

[0181] The reference frequency point may include at least one of the following: the center frequency point of the first PRDCH; the start frequency point of the first PRDCH; the end frequency point of the first PRDCH; the center frequency point of the second PRDCH; the start frequency point of the second PRDCH; the end frequency point of the second PRDCH; the center frequency point of the third PRDCH; the start frequency point of the third PRDCH; the end frequency point of the third PRDCH; or a frequency point predefined by the protocol.

[0182] For example, the offset between the frequency domain resources transmitted by at least one PRDCH and the reference frequency of a specific channel can also be an identifier or index value in a predefined list of protocols.

[0183] The code field resource information of at least one PRDCH transmission includes at least one of the following: a sequence contained in the preamble of at least one PRDCH transmission message; a sequence number contained in the preamble of at least one PRDCH transmission message; and an index value contained in the preamble of at least one PRDCH transmission message.

[0184] For example, the preamble associated with the PRDCH carrying different code field information can come from different IoT device groups in different environments, different readers, different base stations, or different messages that trigger the transmission of Msg1 in the PRDCH. The code field sequence can be one or a combination of Gold sequence, ZC sequence, or M sequence.

[0185] For example, PRDCH transmission messages carrying different code field information can come from different IoT device groups in different environments, different readers, different base stations, or different PRDCH transmission messages that trigger the transmission of Msg1, etc. The code field sequence can be one or a combination of Gold sequence, ZC sequence, or M sequence, etc.

[0186] Figure 6B is a second schematic diagram illustrating the determination of transmission resources for at least one PRDCH transmission message according to an embodiment of this disclosure. As shown in Figure 6B, assuming the at least one PRDCH transmission message is Msg2 and the second message is Msg1, the environmental IoT device can obtain the time-domain position of sending the Msg2 message corresponding to Msg1 based on a reference time and a time offset relative to the reference time. The reference time can be the end position of the message that triggers the transmission of Msg1 (Option 3 in Figure 6B), the end position of the time-domain resources used for Msg1 transmission (Option 2 in Figure 6B), or the end position of the Msg1 message sent by the environmental IoT device (Option 1 in Figure 6B). The specific reference point can be predefined by the protocol or indicated by a paging message and / or a PRDCH transmission message carrying first information.

[0187] The common time offset of the Msg2 message relative to the reference time can also be a specific identifier or index value in the protocol's pre-configured time offset list.

[0188] Environmental IoT devices receive Msg2 messages in the corresponding frequency domain based on the frequency domain information of the Msg2 message, including at least one of the following situations:

[0189] Case 1: The frequency domain resources where the Msg2 message resides are the same as those of the paging message and / or the PRDCH message carrying the first information.

[0190] Scenario 2: For environmental IoT device 1, the frequency range for receiving Msg2 is the same as the frequency range for receiving paging messages. For environmental IoT devices 2a and 2b, the center frequency of the Msg2 signal is the same as the center frequency of the paging message or a previously received PRDCH transmission message. The channel of the Msg2 signal is the same as the channel of the paging message or a previously received PRDCH transmission message.

[0191] Case 3: If the center frequency of the frequency domain resource containing the Msg2 message is offset by fc_offset from the center frequency fc#1 of the same frequency domain resource as the paging message and / or the PRDCH message carrying the first information, then the environmental IoT device receives the Msg2 message on a frequency or channel with a center frequency of fc#1+fc_offset. As shown in Figure 6C, Figure 6C is a schematic diagram (3) illustrating the determination of transmission resources for at least one PRDCH message according to an embodiment of this disclosure.

[0192] Case 4: The frequency domain resource where the Msg2 message resides is a frequency point / band / channel identified or indexed as K1. For example, if the protocol defines N transmission channels or frequency bands, and the corresponding transmission channel or frequency band bandwidth is BW, then the environmental IoT device finds the frequency domain resource of Msg2 based on the identifier or index K1. As shown in Figure 6D, Figure 6D is a schematic diagram four illustrating the determination of the transmission resources of at least one PRDCH transmission message provided by an embodiment of this disclosure.

[0193] Case 5: The frequency shift factor K3 corresponds to the Msg2 message. The environmental IoT device adjusts the frequency of receiving Msg2 according to the frequency shift factor K3 to an integer multiple of K3 or 1 / K3.

[0194] The process of "receiving the first message based on the first information" is explained below.

[0195] The chip length of the paging message and / or the PRDCH message carrying the first information is chip#1, and its signal frequency is 1 / chip#1. Based on the frequency shift factor K3 corresponding to the Msg2 message, the signal frequency of the Msg2 message is determined to be K3 / chip#1. Environmental IoT devices detect the corresponding Msg2 message based on the code field information, including at least one of the following:

[0196] Scenario 1: When an environmental IoT device receives Msg2 in the aforementioned time domain resources, if it detects the codeword sequence carried by the corresponding Msg2, it will receive the corresponding Msg2 message.

[0197] Scenario 2: When receiving Msg2 using the aforementioned time-domain resources, the environmental IoT device determines the codeword sequence carried by Msg2 based on the sequence number or index value in the predefined codeword sequence set of the protocol. By detecting the codeword sequence carried by Msg2, the corresponding Msg2 message is received.

[0198] Scenario 3: When the environmental IoT device receives Msg2 in the aforementioned time-domain resources, it performs sequence information detection on at least one of the preamble, control information, and data information, such as correlation detection. If the detection result meets a specific threshold or is consistent with the sequence information sent by the environmental IoT device, then the Msg2 message is the Msg2 message corresponding to the environmental IoT device.

[0199] The communication method provided in this disclosure allows environmental IoT devices to receive a first message on corresponding transmission resources (time domain / frequency domain / code domain) based on first information, thereby improving communication accuracy.

[0200] Based on any of the above embodiments, and in conjunction with Figures 7A and 7B, the process of determining the starting position of at least one PDRCH transmission message based on the first information will be described.

[0201] The process of environmental IoT devices receiving paging messages and / or messages transmitted by PRDCH to obtain first information can be referred to any of the above embodiments and will not be repeated here.

[0202] Figure 7A is a schematic diagram five illustrating the determination of transmission resources for at least one PRDCH transmission message according to an embodiment of this disclosure. As shown in Figure 7A, when the reference time is a dedicated reference time, the dedicated reference time of each IoT device in the environment is the same, and the time-domain resource information of at least one PRDCH transmission message may include at least one of the following:

[0203] Case 1: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time.

[0204] Case 2: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; the duration of at least one PRDCH transmission.

[0205] Case 3: A list of offset values ​​between the start time and a specific reference time of at least one PRDCH transmission; and an end identifier for at least one PRDCH transmission message.

[0206] Case 4: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; the number of messages transmitted by at least one PRDCH transmission.

[0207] Case 5: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; a common time offset value between at least one PRDCH transmission and a specific reference time; the duration of at least one PRDCH transmission / the end identifier of at least one PRDCH transmission message.

[0208] Figure 7B is a schematic diagram six illustrating the determination of transmission resources for at least one PRDCH transmission message according to an embodiment of this disclosure. As shown in Figure 7B, when the reference time is a dedicated reference time, the dedicated reference time of each IoT device in the environment is different, and the time-domain resource information for at least one PRDCH transmission message may include at least one of the following:

[0209] Case 1: A list of offset values ​​between the start time and a specific reference time of at least one PRDCH transmission; an end identifier of at least one PRDCH transmission message; and the time interval between two adjacent PRDCH transmissions.

[0210] Case 2: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; the duration of at least one PRDCH transmission; and the time interval between two adjacent PRDCH transmissions.

[0211] Case 3: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; the total transmission duration of at least one PRDCH transmission.

[0212] Case 4: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; the total transmission duration of at least one PRDCH transmission; the duration of at least one PRDCH transmission; and the time interval between two adjacent PRDCH transmissions.

[0213] Case 5: A list of offset values ​​between the start time and a specific reference time of at least one PRDCH transmission; the number of at least one PRDCH transmission messages; the duration of at least one PRDCH transmission / the end marker of at least one PRDCH transmission message.

[0214] Case 6: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; the duration of at least one PRDCH transmission / the end identifier of at least one PRDCH transmission message; the time interval between two adjacent PRDCH transmissions.

[0215] Case 7: A list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference time; the duration of at least one PRDCH transmission / the end identifier of at least one PRDCH transmission message; a list of offset values ​​between the start time of at least one PRDCH transmission and a specific reference point.

[0216] For example, the list of offset values ​​{offset_msg2_i} between the start time of at least one PRDCH transmission and a specific reference time is shown below:

[0217] Index#1: offset_msg2#1

[0218] Index#2: offset_msg2#2

[0219] ...

[0220] Here, a specific reference time can be a public reference point or a dedicated reference time for environmental IoT devices.

[0221] For example, a list of offset values ​​{offset_msg2_i} between the start time of at least one PRDCH transmission and a specific reference time. The specific reference time is a reference point specific to the PRDCH transmission.

[0222] For example, the end position of the corresponding PDRCH transmission, or the end position of a specific time-frequency code resource used for PDRCH transmission, or the end or start position of the previous PDRCH transmission.

[0223] The frequency domain resource information and code domain resource information of at least one PDRCH transmission are described in any of the above embodiments, and will not be repeated here.

[0224] Environmental IoT devices can determine the transmission resources for at least one PRDCH transmission based on first information. Taking time-domain resource information and frequency-domain resource information as examples, determining the transmission resources for at least one PRDCH transmission message can include at least one of the following situations:

[0225] Case 1: A list of offset values ​​{offset_msg2_i} between the start time of at least one PRDCH transmission and a specific reference time, as shown below:

[0226] Index#1: offset_msg2#1 (time offset #1)

[0227] Index#2: offset_msg2#2 (time offset #2),

[0228] ...

[0229] If a specific reference point can be a common reference point, then the starting position of at least one PRDCH transmission is: common reference time + offset_msg2#i.

[0230] If a specific reference point is the dedicated reference time corresponding to a PRDCH transmission, then the starting position of at least one PRDCH transmission is: the dedicated reference time #i+offset_msg2#i corresponding to the PRDCH transmission.

[0231] Case 2: The time offset of the first PRDCH transmission from a specific reference time is offset_msg2_1, the interval between two adjacent PRDCH transmissions is Msg2_gap, and the duration of Msg2 is duration_msg2. Then, the starting position of the i-th PRDCH transmission is: offset_msg2_1 + (i-1)*(Msg2_gap + duration_msg2). Here, the time interval between two adjacent PRDCH transmissions is the time interval between the end time of one PRDCH transmission and the start time of the next PRDCH transmission. The starting position of the i-th PRDCH transmission can also be: offset_msg2_1 + (i-1)*(Msg2_gap). Here, the time interval between two adjacent PRDCH transmissions is the time interval between the start time of one PRDCH transmission and the start time of the next PRDCH transmission.

[0232] Scenario 3: The common time offset between the PRDCH transmission and a specific reference time is offset_msg2, and the total transmission duration of at least one PRDCH transmission is duration_msg2. Then, all IoT devices in the environment sending the second message will listen at the common time offset value offset_msg2 of the specific reference time until the listening duration is duration_msg2. The specific reference time can also be a common reference time.

[0233] Case 4: The list of offset values ​​between the start time and a specific reference time of at least one PRDCH transmission is {offset_msg2_i}, and the list of durations of at least one PRDCH transmission is {duration_msg2_i}. The specific reference time is the dedicated reference time corresponding to the PRDCH transmission. For example, the end position of the corresponding PDRCH transmission, or the end position of a specific time-frequency code resource used for the PDRCH transmission, or the end or start position of the previous PRDCH transmission.

[0234] The communication method provided in this disclosure allows an environmental IoT device to determine the starting position of PDRCH transmission based on first information, thereby receiving the first message at the starting position of PDRCH transmission. This improves the accuracy of communication.

[0235] Based on any of the above embodiments, and in conjunction with Figures 8A and 8B, the process of receiving the first message based on the first information and the first associated information will be described.

[0236] The first associated information is used by environmental IoT devices to obtain the corresponding first message based on the information list in the first information.

[0237] Figure 8A is a schematic diagram seven illustrating the transmission resources for determining at least one PRDCH transmission message according to an embodiment of this disclosure. Taking the list of offset values ​​{offset_msg2_i} between the start time and a specific reference time of the Msg2 message as an example, the environmental IoT devices correspond one-to-one with the index numbers of the time-frequency resources used to transmit Msg1. The IoT device receiving the first message includes at least one of the following situations:

[0238] Scenario 1: The IoT device calculates its resource index based on at least one of the following: device information (e.g., device ID or PN16 random code), the number of time / frequency / code domain resources {M, N, K}, and the sorting method of the time / frequency / code resources (codepoint). For example, index = mod(Device ID ({M, N, K}@Codepoint). This allows performing modulo operations on the values ​​corresponding to the device's own information and the number of time / frequency / code domain resources, for example:

[0239] Codepoint#1:index=mod(Device ID ,M*N*K)

[0240] Here, Codepoint#1 represents the sequential arrangement of code, frequency, and time domains. For example, {M,N,K}={4,3,2}, and the index of the time-frequency code domain resources is shown in Figure 7A.

[0241] Codepoint#2: index=mod(Device ID M).

[0242] Codepoint#2 represents the time-domain sorting. The Device ID can be a randomly generated ID or the device number of the IoT device itself. For example, the Device ID could be RN16.

[0243] The index is determined using the two methods described above, and the first information is determined based on the index. This allows the reception of the first message corresponding to the IoT device in the environment on the appropriate transmission resources.

[0244] Scenario 2: If the environmental IoT device can start timing, the environmental IoT device can start listening and receive the corresponding Msg2 when the time offset value of Msg2 corresponding to the corresponding index is reached.

[0245] Figure 8B is a schematic diagram illustrating the determination of transmission resources for at least one PRDCH transmission message according to an embodiment of this disclosure. Taking the list of offset values ​​{offset_msg2_i} between the start time of the Msg2 message and a specific reference time as an example, the environmental IoT device determines the index number of the time-frequency resources used for transmitting Msg1 in a one-to-many relationship, that is, one Msg2 corresponds to multiple time-frequency resources used for transmitting Msg1. The environmental IoT device receives the first message in at least one of the following situations:

[0246] Scenario 1: The IoT device calculates the resource index based on at least one of the following: device information (e.g., device ID or PN16 random code), the number of time / frequency / code domain resources {M, N, K}, and the sorting method of the time / frequency / code resources (codepoint). It then transmits the packet parameter P of the time / frequency resources for Msg1. For example, index = mod(Device ID In addition, devices are grouped, for example: {M, N, K, P}@Codepoint).

[0247] Codepoint#1:index=mod(Device ID ,P)+mod(Device ID ,M*N*K)

[0248] Codepoint#2: index=mod(Device ID ,P)+mod(Device ID M)

[0249] The Device ID can be a randomly generated ID or a device number that is unique to the IoT device itself. For example, the Device ID could be RN16.

[0250] The index is determined using the two methods described above, and the first information is determined based on the index. This allows the reception of the first message corresponding to the IoT device in the environment on the appropriate transmission resources.

[0251] Scenario 2: If the environmental IoT device can start timing, the environmental IoT device can start listening and receive the corresponding Msg2 when the time offset value of Msg2 corresponding to the corresponding index is reached.

[0252] Based on any of the above embodiments, the process of receiving the first message based on the first information and the first associated information (Embodiment 4) will be described below.

[0253] Environmental IoT devices receive a first message based on first information and first associated information. The first information and / or first associated information are carried through at least one method, such as a paging message or a message transmitted via PRDCH. The first information can also be obtained through a predefined protocol. The first information can be found in any of the above embodiments and will not be repeated here.

[0254] The first association information is used by environmental IoT devices to obtain the corresponding Msg2 information based on the information list in the first information. The resource information of the Msg2 message in the first information has a second association relationship with the device ID-related information. Taking the list of offset values ​​{offset_msg2_i} between the time-domain start time of the Msg2 message and a specific reference point as an example, the process of determining the first information includes at least one of the following:

[0255] Scenario 1: A list of time offset values ​​for Msg2 corresponding to device ID information. The IoT device in the environment determines the first information according to specific operation 1. This includes the index of the device ID determined by specific operation 1 and the corresponding list of time offset values ​​for Msg2 (the index of the device ID determined by specific operation 1 may differ from the index determined by the IoT device). For example, specific operation 1 is mod(Device ID, P), where P is the number of Msg2 messages in the Msg2 stage, or the number of devices that Msg2 can carry.

[0256] The environmental IoT device obtains the starting position of the corresponding Msg2 message based on the index determined by specific operation 1.

[0257] Scenario 2: The environmental IoT device performs a specific operation 1. For example, it performs a modulo operation on the grouping parameters and the device ID to obtain value#1. If value#1 equals the preset value or the value indicated by R2D, the environmental IoT device can perform Msg2 listening at a specific Msg2 time-frequency resource location.

[0258] The communication method provided in this disclosure allows an environmental IoT device to determine the corresponding transmission resource among at least one transmission resource in the PDRCH transmission indicated by the first association information. This enables the device to receive the first message on the transmission resource corresponding to its environmental IoT device, thus improving communication accuracy.

[0259] Based on the same technical concept, this disclosure also provides a communication device. This communication device can realize the functions of the environmental IoT devices described in the foregoing embodiments.

[0260] Figure 9 is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure. The communication device is applied to an environmental Internet of Things (IoT) device. As shown in Figure 9, the communication device 900 may include an acquisition unit 901 and a receiving unit 902.

[0261] Acquisition unit 901 is used to acquire first information;

[0262] The receiving unit 902 is configured to receive a first message transmitted from the physical layer reader to the device channel PRDCH according to the first information;

[0263] The first information is used to indicate at least one transmission resource for PRDCH transmission.

[0264] Figure 10 is a second schematic diagram of the structure of a communication device provided in an embodiment of this disclosure. The communication device is applied to a reader / writer. As shown in Figure 10, the communication device 1000 may include: a transmitting unit 1001.

[0265] The sending unit 1001 is used to send a first message to an environmental IoT device;

[0266] The first message is transmitted via at least one transport resource bearer transmitted through the physical layer reader indicated by the first information to the device channel PRDCH.

[0267] It should be noted that the division of units in the embodiments of this disclosure is illustrative and only represents one logical functional division. In actual implementation, other division methods may be used. Furthermore, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated units described above can be implemented in hardware or as software functional units.

[0268] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a processor-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the related technology, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute all or part of the steps of the methods provided in the various embodiments of this disclosure.

[0269] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented by the method embodiment executed by the reader and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described again here.

[0270] Figure 11 is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure. As shown in Figure 11, the communication device may include: a memory 1120 for storing computer programs; a transceiver 1100 for sending and receiving data under the control of a processor 1110; and a processor 1110 for reading the computer program stored in the memory 1120 and performing the following operations:

[0271] Obtain first information;

[0272] Based on the first information, receive the first message transmitted from the physical layer reader to the device channel PRDCH;

[0273] The first information is used to indicate at least one transmission resource for PRDCH transmission.

[0274] In one implementation, the first message includes at least one of the following:

[0275] The response message corresponding to the second message;

[0276] Messages used to schedule third messages;

[0277] The message used to trigger the fourth message;

[0278] The second message is at least one of the following: Msg1 of the random access procedure, or a random access message, or a message transmitted from the physical layer device to the reader channel (PDRCH) sent by the environmental IoT device; the third message is at least one of the following: Msg3 of the random access procedure, or a message transmitted via PDRCH; and the fourth message is a message transmitted via PDRCH sent by the environmental IoT device.

[0279] In one embodiment, the processor 1110 is configured to receive a first message based on first information, including:

[0280] Determine a first transmission resource from at least one transmission resource indicated by the first information, and receive a first message on the first transmission resource; or,

[0281] Receive the first message on the transmission resource indicated by the first information.

[0282] In one embodiment, the processor 1110 is further configured to:

[0283] Obtain the first related information;

[0284] Processor 1110 is configured to determine a first transmission resource from at least one transmission resource indicated by first information, including:

[0285] Based on the first association information, a first transmission resource is determined from at least one transmission resource indicated by the first information.

[0286] In one implementation, the first associated information includes at least one of the following:

[0287] The association between the transmission resources of the PRDCH containing the first message and the transmission resources of at least one second message;

[0288] The relationship between the transmission resources of the PRDCH where the first message is located and the environmental IoT devices;

[0289] The relationship between the transmission resources of the PRDCH where the first message is located and the group of IoT devices in the environment; or...

[0290] The association between the transmission resources of the PRDCH where the first message is located and the channel where the trigger message is located or the signal associated with the channel where the trigger message is located.

[0291] In one implementation, the trigger message includes at least one of the following:

[0292] Paging message; or,

[0293] The channel on which the trigger message is located contains the channel information of the PRDCH received by the environmental IoT device.

[0294] In one implementation, the first information and / or the first associated information are obtained through at least one of the following methods:

[0295] Paging messages;

[0296] The fifth message transmitted via PRDCH; or,

[0297] Protocol default method.

[0298] In one implementation, the first information is used to indicate at least one of the following:

[0299] At least one time-domain resource information transmitted via PRDCH;

[0300] At least one frequency domain resource information transmitted via PRDCH; or,

[0301] At least one code field resource information transmitted via PRDCH.

[0302] In one implementation, the time-domain resource information transmitted by at least one PRDCH includes at least one of the following:

[0303] The start time of at least one PRDCH transmission;

[0304] The first time offset between the start time of at least one PRDCH transmission and the first reference time;

[0305] The second time offset between the start time of the first PRDCH transmission and the second reference time;

[0306] A third time offset between the end time of at least one PRDCH transmission and the first reference time;

[0307] The duration of at least one PRDCH transmission;

[0308] The total transmission duration of at least one PRDCH transmission;

[0309] The end time of at least one PRDCH transmission;

[0310] The end time of the last PRDCH transmission in at least one PRDCH transmission;

[0311] The time interval between two adjacent PRDCH transmissions;

[0312] The number of messages transmitted by at least one PRDCH; or,

[0313] Transmission waveform information for at least one PRDCH transmission.

[0314] In one implementation, the first reference time and / or the second reference time includes at least one of the following:

[0315] At least one common reference time for PRDCH transmission; or,

[0316] A dedicated reference time for PRDCH transmission.

[0317] In one implementation, the common reference time for at least one PRDCH transmission includes at least one of the following: the transmission start time of the sixth message of the PRDCH transmission;

[0318] The end time of the transmission of the sixth message in the PRDCH transmission;

[0319] The start time of paging message transmission;

[0320] The end time of paging message transmission;

[0321] The start time of the first time-domain resource corresponding to the second message; or, the end time of the last time-domain resource corresponding to the second message;

[0322] The sixth message is used to trigger random access or is a scheduling message carrying the third message.

[0323] In one implementation, the dedicated reference time includes at least one of the following:

[0324] The start time of transmission of a message in a specific PRDCH transmission preceding the seventh message of the first PRDCH transmission;

[0325] The end time of the transmission of a message in a specific PRDCH transmission preceding the transmission of the seventh message in the first PRDCH transmission.

[0326] The start time of sending the second message in the time domain;

[0327] The end time of the time domain resource for sending the second message;

[0328] The start time of the transmission of the first PDRCH at which the second message is sent;

[0329] The moment when the transmission of the first PDRCH ends, at which the second message is sent;

[0330] The end time of the transmission of the eighth message in the second PRDCH transmission; or,

[0331] The end time of transmission of the eighth message of the second PRDCH transmission;

[0332] Wherein, the first PRDCH is the channel carrying the first message, and the first PDRCH is the channel carrying the second message.

[0333] In one implementation, the first time offset satisfies at least one of the following conditions:

[0334] In at least one PRDCH transmission, the first time offset corresponding to the preset PRDCH transmission is greater than or equal to the first threshold; or, in at least one PRDCH transmission, the first time offset corresponding to the first PRDCH transmission is greater than or equal to the first threshold; or, in at least one PRDCH transmission, the first time offset corresponding to the last PRDCH transmission is greater than or equal to the first threshold; or, in at least one PRDCH transmission, the first time offset corresponding to all of them is greater than or equal to the first threshold.

[0335] The first threshold is the minimum time interval between a PDRCH transmission and its corresponding PRDCH transmission.

[0336] In one implementation, the third time offset satisfies at least one of the following conditions:

[0337] In at least one PRDCH transmission, the third time offset corresponding to the preset PRDCH transmission is less than or equal to the second threshold; or, in at least one PRDCH transmission, the third time offset corresponding to the first PRDCH transmission is less than or equal to the second threshold; or, in at least one PRDCH transmission, the third time offset corresponding to the last PRDCH transmission is less than or equal to the second threshold; or, in at least one PRDCH transmission, the third time offset corresponding to all of them is less than or equal to the second threshold.

[0338] The second threshold is the maximum time interval between a PDRCH transmission and its corresponding PRDCH transmission.

[0339] In one implementation, the frequency domain resource information transmitted by at least one PRDCH includes at least one of the following:

[0340] The starting position of at least one frequency domain resource transmitted by a PRDCH;

[0341] The number of frequency domain resources or channels transmitted by at least one PRDCH;

[0342] The termination position of at least one frequency domain resource transmitted by a PRDCH;

[0343] The center frequency point corresponding to at least one frequency domain resource transmitted by a PRDCH;

[0344] The starting frequency point corresponding to at least one frequency domain resource transmitted by a PRDCH;

[0345] The termination frequency corresponding to at least one frequency domain resource transmitted by a PRDCH;

[0346] An identifier for at least one frequency domain resource transmitted via PRDCH;

[0347] The identifier of the channel for at least one frequency domain resource transmitted by a PRDCH;

[0348] The index value of at least one frequency domain resource transmitted by a PRDCH;

[0349] The index value of the channel of at least one frequency domain resource transmitted by a PRDCH;

[0350] The offset between the frequency domain resources of at least one PRDCH transmission and the reference frequency of a specific channel;

[0351] The offset between the frequency domain resources of at least one PRDCH transmission and the reference frequency of a specific signal;

[0352] At least one frequency shift factor for PRDCH transmission; or,

[0353] Relevant parameters regarding the transmission bandwidth of at least one PRDCH transmission.

[0354] In one implementation, a particular channel includes at least one of the following:

[0355] First PDRCH;

[0356] Second PRDCH; or,

[0357] The third PRDCH is used to carry paging messages.

[0358] In one implementation, the reference frequency of a specific channel includes at least one of the following:

[0359] Center frequency;

[0360] Starting frequency point; or,

[0361] Termination frequency.

[0362] In one implementation, the reference frequency point of a specific signal includes:

[0363] The frequency point of the carrier waveform;

[0364] The frequency of the preamble associated with PRDCH; or...

[0365] The frequency of the preamble associated with PDRCH.

[0366] In one implementation, the code field resource information transmitted by at least one PRDCH includes at least one of the following:

[0367] At least one PRDCH transmits the corresponding codeword sequence; or,

[0368] At least one PRDCH transmits information related to the corresponding codeword sequence.

[0369] In Figure 11, the bus architecture may include any number of interconnected buses and bridges, linking various circuits represented by one or more processors (represented by a processor) and memories (represented by memory). The bus architecture may also link various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides the interface. The transceiver may be multiple elements, including a transmitter and a receiver, providing a unit for communicating with various other devices over transmission media, including wireless channels, wired channels, optical fibers, etc. The processor is responsible for managing the bus architecture and general processing, and the memory may store data used by the processor 1110 during operation.

[0370] The processor 1110 can be a central processing unit (CPU), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or a complex programmable logic device (CPLD). The processor can also adopt a multi-core architecture.

[0371] The processor 1110 executes any of the methods provided in the embodiments of this disclosure by calling a computer program stored in memory, according to the obtained executable instructions. The processor 1110 and the memory 1120 may also be physically separated.

[0372] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented by the method embodiment executed by the above-mentioned environmental IoT device, and can achieve the same technical effect. Therefore, the parts that are the same as those in the method embodiment and the beneficial effects will not be described again here.

[0373] Figure 12 is a schematic diagram of the structure of a communication device provided in an embodiment of this disclosure. As shown in Figure 12, the communication device may include: a memory 1220 for storing computer programs; a transceiver 1200 for sending and receiving data under the control of a processor 1210; and a processor 1210 for reading the computer program stored in the memory 1220 and performing the following operations:

[0374] Send the first message to the environmental IoT device;

[0375] The first message is transmitted via at least one transport resource bearer transmitted through the physical layer reader indicated by the first information to the device channel PRDCH.

[0376] In one implementation, the first message includes at least one of the following:

[0377] The response message corresponding to the second message;

[0378] Messages used to schedule third messages;

[0379] The message used to trigger the fourth message;

[0380] The second message is at least one of the following: Msg1 of the random access procedure, or a random access message, or a message transmitted from the physical layer device to the reader channel (PDRCH) sent by the environmental IoT device; the third message is at least one of the following: Msg3 of the random access procedure, or a message transmitted via PDRCH; and the fourth message is a message transmitted via PDRCH sent by the environmental IoT device.

[0381] In one embodiment, the processor 1210 is further configured to:

[0382] Send the first association information to the environmental IoT device.

[0383] In one implementation, the first associated information includes at least one of the following:

[0384] The association between the transmission resources of the PRDCH containing the first message and the transmission resources of at least one second message;

[0385] The relationship between the transmission resources of the PRDCH where the first message is located and the environmental IoT devices;

[0386] The relationship between the transmission resources of the PRDCH where the first message is located and the group of IoT devices in the environment; or...

[0387] The association between the transmission resources of the PRDCH where the first message is located and the channel where the trigger message is located or the signal associated with the channel where the trigger message is located.

[0388] In one implementation, the trigger message includes at least one of the following:

[0389] Paging message; or,

[0390] The channel on which the trigger message is located contains the channel information of the PRDCH received by the environmental IoT device.

[0391] In one implementation, the first information and / or the first associated information are sent in at least one of the following ways:

[0392] Paging messages;

[0393] The fifth message transmitted via PDRCH; or,

[0394] Protocol default method.

[0395] In one implementation, the first information is used to indicate at least one of the following:

[0396] At least one time-domain resource information transmitted via PRDCH;

[0397] At least one frequency domain resource information transmitted via PRDCH; or,

[0398] At least one code field resource information transmitted via PRDCH.

[0399] In one implementation, the time-domain resource information transmitted by at least one PRDCH includes at least one of the following:

[0400] The start time of at least one PRDCH transmission;

[0401] The first time offset between the start time of at least one PRDCH transmission and the first reference time;

[0402] The second time-domain offset between the start time of the first PRDCH transmission and the second reference time;

[0403] A third time offset between the end time of at least one PRDCH transmission and the first reference time;

[0404] The duration of continuous reception of at least one PRDCH transmission;

[0405] The total transmission duration of at least one PRDCH transmission;

[0406] The end time of at least one PRDCH transmission;

[0407] The end time of the last PRDCH transmission in at least one PRDCH transmission;

[0408] The time interval between two adjacent PRDCH transmission messages;

[0409] The number of messages transmitted by at least one PRDCH; or,

[0410] At least one PRDCH transmission message with transmission waveform information.

[0411] In one implementation, the first reference time and / or the second reference time includes at least one of the following:

[0412] At least one common reference time for PRDCH transmission; or,

[0413] A dedicated reference time for PRDCH transmission.

[0414] In one implementation, the common reference time for at least one PRDCH transmission includes at least one of the following:

[0415] The start time of the transmission of the sixth message in the PRDCH transmission;

[0416] The end time of the transmission of the sixth message in the PRDCH transmission;

[0417] The start time of paging message transmission;

[0418] The end time of paging message transmission;

[0419] The start time of the first time-domain resource corresponding to the second message; or,

[0420] The end time of the last time domain resource corresponding to the second message;

[0421] The sixth message is used to trigger random access or is a scheduling message carrying the third message.

[0422] In one implementation, the dedicated reference time includes at least one of the following:

[0423] The start time of transmission of a message in a specific PRDCH transmission preceding the seventh message of the first PRDCH transmission;

[0424] The end time of the transmission of a message in a specific PRDCH transmission preceding the transmission of the seventh message in the first PRDCH transmission.

[0425] The start time of sending the second message in the time domain;

[0426] The end time of the time domain resource for sending the second message;

[0427] The start time of the transmission of the first PDRCH at which the second message is sent;

[0428] The moment when the transmission of the first PDRCH ends, at which the second message is sent;

[0429] The end time of the transmission of the eighth message in the second PRDCH transmission; or,

[0430] The end time of transmission of the eighth message of the second PRDCH transmission;

[0431] Wherein, the first PRDCH is the channel carrying the first message, and the first PDRCH is the channel carrying the second message.

[0432] In one implementation, the first time offset satisfies at least one of the following conditions:

[0433] In at least one PRDCH transmission, the first time offset corresponding to the preset PRDCH transmission is greater than or equal to the first threshold; or, in at least one PRDCH transmission, the first time offset corresponding to the first PRDCH transmission is greater than or equal to the first threshold; or, in at least one PRDCH transmission, the first time offset corresponding to the last PRDCH transmission is greater than or equal to the first threshold; or, in at least one PRDCH transmission, the first time offset corresponding to all of them is greater than or equal to the first threshold.

[0434] The first threshold is the minimum time interval between a PDRCH transmission and its corresponding PRDCH transmission.

[0435] In one implementation, the third time offset satisfies at least one of the following conditions:

[0436] In at least one PRDCH transmission, the third time offset corresponding to the preset PRDCH transmission is less than or equal to the second threshold; or, in at least one PRDCH transmission, the third time offset corresponding to the first PRDCH transmission is less than or equal to the second threshold; or, in at least one PRDCH transmission, the third time offset corresponding to the last PRDCH transmission is less than or equal to the second threshold; or, in at least one PRDCH transmission, the third time offset corresponding to all of them is less than or equal to the second threshold.

[0437] The second threshold is the maximum time interval between a PDRCH transmission and its corresponding PRDCH transmission.

[0438] In one implementation, the frequency domain resource information transmitted by at least one PRDCH includes at least one of the following:

[0439] The starting position of at least one frequency domain resource transmitted by a PRDCH;

[0440] The amount of frequency domain resources or the number of channels transmitted by at least one PRDCH;

[0441] The termination position of at least one frequency domain resource transmitted by a PRDCH;

[0442] The center frequency point corresponding to at least one frequency domain resource transmitted by a PRDCH;

[0443] The starting frequency point corresponding to at least one frequency domain resource transmitted by a PRDCH;

[0444] The termination frequency corresponding to at least one frequency domain resource transmitted by a PRDCH;

[0445] An identifier for at least one frequency domain resource transmitted via PRDCH;

[0446] The identifier of the channel for at least one frequency domain resource transmitted by a PRDCH;

[0447] The index value of at least one frequency domain resource transmitted by a PRDCH;

[0448] The index value of the channel of at least one frequency domain resource transmitted by a PRDCH;

[0449] The offset between the frequency domain resources of at least one PRDCH transmission and the reference frequency of a specific channel;

[0450] The offset between the frequency domain resources of at least one PRDCH transmission and the reference frequency of a specific signal;

[0451] At least one frequency shift factor for PRDCH transmission; or,

[0452] Relevant parameters regarding the transmission bandwidth of at least one PRDCH transmission.

[0453] In one implementation, a particular channel includes at least one of the following:

[0454] First PDRCH;

[0455] Second PRDCH; or,

[0456] The third PRDCH is used to carry transmission resource information.

[0457] In one implementation, the reference frequency of a specific channel includes at least one of the following:

[0458] Center frequency;

[0459] Starting frequency point; or,

[0460] Termination frequency.

[0461] In one implementation, the reference frequency point of a specific signal includes:

[0462] The frequency point of the carrier waveform;

[0463] The frequency of the preamble associated with PRDCH; or...

[0464] The frequency of the preamble associated with PDRCH.

[0465] In one implementation, the code field resource information transmitted by at least one PRDCH includes at least one of the following:

[0466] At least one PRDCH transmits the corresponding codeword sequence; or,

[0467] At least one PRDCH transmits information related to the corresponding codeword sequence.

[0468] The bus architecture in Figure 12 is similar to or the same as that in Figure 11, so it will not be described again here.

[0469] The processor 1210 can be a CPU, ASIC, FPGA or complex programmable logic device CPLD, and the processor can also adopt a multi-core architecture.

[0470] The processor 1210 executes any of the methods provided in the embodiments of this disclosure by calling a computer program stored in memory, according to the obtained executable instructions. The processor 1210 and the memory 1220 may also be physically separated.

[0471] It should be noted that the apparatus provided in this embodiment can implement all the method steps implemented by the method embodiment executed by the reader and can achieve the same technical effect. Therefore, the parts and beneficial effects that are the same as those in the method embodiment will not be described again here.

[0472] This disclosure also provides a processor-readable storage medium storing a computer program for causing a processor to perform all the method steps described in the above method embodiments.

[0473] Non-transiently readable storage media can be any available medium or data storage device that the processor can access, including but not limited to magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)).

[0474] This disclosure also provides a computer program product, including a computer program that, when executed by a processor, implements any of the methods described in the above embodiments.

[0475] Processor-readable storage media can be any available medium or data storage device that the processor can access, including but not limited to magnetic storage (e.g., floppy disks, hard disks, magnetic tapes, magneto-optical disks (MOs), etc.), optical storage (e.g., CDs, DVDs, BDs, HVDs, etc.), and semiconductor storage (e.g., ROMs, EPROMs, EEPROMs, non-volatile memory (NAND flash), solid-state drives (SSDs)).

[0476] Those skilled in the art will understand that embodiments of this disclosure can be provided as methods, systems, or computer program products. Therefore, this disclosure can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this disclosure can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0477] This disclosure is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this disclosure. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer-executable instructions. These computer-executable instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in one or more flowchart illustrations and / or one or more block diagrams.

[0478] These processor-executable instructions may also be stored in a processor-readable memory that can instruct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the processor-readable memory produce an article of manufacture including instruction means that implement the functions specified in one or more flowcharts and / or one or more block diagrams.

[0479] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A communication method, wherein, The method is applied to an environmental Internet of Things device, and the method comprises: obtaining first information; receiving a first message of a physical layer reader-to-device channel (PRDCH) transmission according to the first information; wherein the first information is used for indicating at least one transmission resource of the PRDCH transmission.

2. The method of claim 1, wherein, The first message comprises at least one of the following: a response message corresponding to a second message; a message used for scheduling a third message; a message used for triggering a fourth message; wherein the second message is at least one of a message Msg1 of a random access procedure, a random access message, or a message of a physical layer device-to-reader channel (PDRCH) transmission sent by the environmental Internet of Things device; the third message is at least one of a message Msg3 of the random access procedure or a message of the PDRCH transmission; and the fourth message is a message of the PDRCH transmission sent by the environmental Internet of Things device.

3. The method of claim 1, wherein, The receiving of the first message according to the first information comprises: determining a first transmission resource from the at least one transmission resource indicated by the first information, and receiving the first message on the first transmission resource; or receiving the first message on the transmission resource indicated by the first information.

4. The method according to any one of claims 1 to 3, wherein, The first information and / or first associated information are obtained by at least one of the following ways: a paging message; a fifth message of the PRDCH transmission; or a protocol preset manner.

5. The method according to any one of claims 1 to 4, wherein, The first information is used for indicating at least one of the following: time domain resource information of the at least one PRDCH transmission; frequency domain resource information of the at least one PRDCH transmission; or code domain resource information of the at least one PRDCH transmission.

6. The method of claim 5, wherein, The time domain resource information of the at least one PRDCH transmission comprises at least one of the following: a starting time of the at least one PRDCH transmission; a first time offset between a starting time of the at least one PRDCH transmission and a first reference time; a second time offset between a starting time of a first PRDCH transmission and a second reference time; a third time offset between an ending time of the at least one PRDCH transmission and the first reference time; a duration of the at least one PRDCH transmission; a total transmission duration of the at least one PRDCH transmission; an ending time of the at least one PRDCH transmission; an ending time of a last PRDCH transmission in the at least one PRDCH transmission; a time interval between two adjacent PRDCH transmissions; or a number of messages of the at least one PRDCH transmission; or transmission waveform related information of the at least one PRDCH transmission.

7. The method of claim 6, wherein, The first reference time and / or the second reference time comprises at least one of the following: a common reference time of the at least one PRDCH transmission; or a dedicated reference time of the PRDCH transmission.

8. The method of claim 7, wherein, The common reference time of the at least one PRDCH transmission comprises at least one of the following: a transmission starting time of a sixth message of the PRDCH transmission; a transmission ending time of the sixth message of the PRDCH transmission; a transmission starting time of a paging message; a transmission ending time of the paging message; a start moment of a first time domain resource corresponding to the second message; or an end moment of a last time domain resource corresponding to the second message; The sixth message is used for triggering random access or scheduling a third message.

9. A communication method, wherein, The method is applied to a reader, and the method comprises the following steps: sending a first message to an environmental Internet of Things device; The first message is carried by at least one transmission resource of a physical layer reader-to-device channel (PRDCH) transmission indicated by first information.

10. The method of claim 9, wherein, The first message comprises at least one of the following: a response message corresponding to a second message; a message used for scheduling a third message; a message used for triggering a fourth message; The second message is at least one of a message Msg1 of a random access process, a random access message or a message of a physical layer device-to-reader channel (PDRCH) transmission sent by the environmental Internet of Things device; the third message is at least one of a Msg3 of the random access process or a message of the PDRCH transmission; and the fourth message is a message of the PDRCH transmission sent by the environmental Internet of Things device.

11. The method of claim 9, wherein, The first message is sent to the environmental Internet of Things device, comprising the following steps: sending the first message on a first transmission resource in the at least one transmission resource indicated by the first information; or sending the first message on the transmission resource indicated by the first information.

12. The method according to any one of claims 9 to 11, wherein, The method further comprises the following steps: sending a paging message to the environmental Internet of Things device, wherein the paging message comprises the first information and / or first association information; and / or sending a fifth message of the PDRCH transmission to the environmental Internet of Things device, wherein the fifth message of the PDRCH transmission comprises the first information and / or first association information.

13. The method according to any one of claims 9 to 12, wherein, The first information is used for indicating at least one of the following: time domain resource information of the at least one PDRCH transmission; frequency domain resource information of the at least one PDRCH transmission; or code domain resource information of the at least one PDRCH transmission.

14. A communications device, wherein, The method is applied to an environmental Internet of Things device, comprising the following steps: an acquisition unit, configured to acquire first information; a receiving unit, configured to receive a first message of a physical layer reader-to-device channel (PRDCH) transmission according to the first information; The first information is used for indicating at least one transmission resource of the PRDCH transmission.

15. A communications device, wherein, The method is applied to an environmental Internet of Things device, comprising a memory, a transceiver and a processor: The memory is used for storing a computer program; The transceiver is used for transceiving data under the control of the processor; The processor is used for reading the computer program in the memory and performing the following operations: an acquisition unit, configured to acquire first information; a receiving unit, configured to receive a first message of a physical layer reader-to-device channel (PRDCH) transmission according to the first information; The first information is used for indicating at least one transmission resource of the PRDCH transmission.

16. The apparatus of claim 15, wherein, The first message comprises at least one of the following: a response message corresponding to a second message; a message used for scheduling a third message; a message used for triggering a fourth message; The second message is at least one of a message Msg1 of a random access procedure, a random access message, or a message of a physical layer device-to-reader channel (PDRCH) transmission sent by the environmental IoT device; the third message is at least one of a message Msg3 of the random access procedure or a message of the PDRCH transmission; and the fourth message is a message of the PDRCH transmission sent by the environmental IoT device.

17. The apparatus of claim 15, wherein, The processor is configured to receive the first message according to the first information, including: determining a first transmission resource from the at least one transmission resource indicated by the first information, and receiving the first message on the first transmission resource; or receiving the first message on the transmission resource indicated by the first information.

18. The apparatus of any of claims 15-17, wherein, The first information is used to indicate at least one of: time domain resource information of the at least one PRDCH transmission; frequency domain resource information of the at least one PRDCH transmission; or code domain resource information of the at least one PRDCH transmission.

19. The apparatus of any of claims 15-18, wherein, The first information is used to indicate at least one of: time domain resource information of the at least one PRDCH transmission; frequency domain resource information of the at least one PRDCH transmission; or code domain resource information of the at least one PRDCH transmission.

20. The apparatus of claim 19, wherein, The time domain resource information of the at least one PRDCH transmission includes at least one of: a start time of the at least one PRDCH transmission; a first time offset between the start time of the at least one PRDCH transmission and a first reference time; a second time offset between the start time of a first PRDCH transmission and a second reference time; a third time offset between an end time of the at least one PRDCH transmission and the first reference time; a duration of the at least one PRDCH transmission; a total transmission duration of the at least one PRDCH transmission; the end time of the at least one PRDCH transmission; the end time of a last PRDCH transmission of the at least one PRDCH transmission; a time interval between two adjacent PRDCH transmissions; a number of the at least one PRDCH transmission; or transmission waveform related information of the at least one PRDCH transmission.

21. A communications device, wherein, Applied to a reader, including: a sending unit configured to send a first message to an environmental IoT device; The first message is sent through at least one transmission resource of a physical layer reader-to-device channel (PRDCH) transmission indicated by first information.

22. A communications device, wherein, Applied to a reader, including a memory, a transceiver, and a processor: a memory configured to store a computer program; a transceiver configured to transceive data under control of the processor; and a processor configured to read the computer program in the memory and perform the following operations: sending a first message to an environmental IoT device; The first message is sent through at least one transmission resource of a physical layer reader-to-device channel (PRDCH) transmission indicated by first information.

23. A non-transitory readable storage medium, wherein, The non-transitory readable storage medium stores a computer program for causing the processor to execute the method of any one of claims 1 to 8, or the method of any one of claims 9 to 13.

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