Message transmission method and apparatus, storage medium, and program product

Abstract

A message transmission method and apparatus, a storage medium, and a program product. The method comprises: sending a first message to a second node, wherein the first message comprises a first public message and / or a second public message, the first public message corresponds to all types of devices, the second public message corresponds to a target device, and the target device is a device of a target type or a device in a target device group.

Description

Message transmission methods, devices, storage media and program products

[0001] This disclosure claims priority to Chinese patent application No. 202510136843.2, filed on February 6, 2025, 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 message transmission method, apparatus, storage medium, and program product. Background Technology

[0003] In traditional communication systems, public messages can include various types of messages, such as master information blocks (MIBs), system information blocks (SIBs), and paging messages. The transmission of these messages requires significant transmission resources. Summary of the Invention

[0004] On one hand, a message transmission method is provided, comprising: sending a first message to a second node; the first message including a first common message and / or a second common message; wherein the first common message corresponds to all types of devices; the second common message corresponds to a target device, the target device being a device of a target type or a device in a target device group.

[0005] In another aspect, a message transmission method is provided, comprising: receiving a first message sent from a first node; the first message including a first common message and / or a second common message; wherein the first common message corresponds to all types of devices; the second common message corresponds to a target device, the target device being a device of a target type or a device in a target device group.

[0006] In another aspect, a message transmission device is provided, comprising: a sending unit; the sending unit is configured to send a first message to a second node; the first message includes a first common message and / or a second common message; wherein the first common message corresponds to all types of devices; the second common message corresponds to a target device, the target device being a device of a target type or a device in a target device group.

[0007] In another aspect, a message transmission device is provided, comprising: a receiving unit; the receiving unit being configured to receive a first message sent from a first node; the first message including a first common message and / or a second common message; wherein the first common message corresponds to all types of devices; the second common message corresponds to a target device, the target device being a device of a target type or a device in a target device group.

[0008] In another aspect, a communication device is provided, comprising: a memory and a processor; the memory and the processor are coupled; the memory is used to store a computer program; and the processor implements the above-described message transmission method when executing the computer program.

[0009] In another aspect, a computer-readable storage medium is provided, including a non-transitory computer-readable storage medium on which computer program instructions are stored, which, when executed by a processor, implement the above-described message transmission method.

[0010] In another aspect, a computer program product is provided, which includes computer program instructions that, when executed by a processor, implement the aforementioned message transmission method. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in this disclosure, the accompanying drawings used in some embodiments of this disclosure will be briefly described below. Obviously, the drawings described below are merely drawings of some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings.

[0012] Figure 1 is an architecture diagram of a communication system according to some embodiments.

[0013] Figure 2 is a flowchart of a message transmission method according to some embodiments.

[0014] Figure 3 is a schematic diagram of a first public message and a synchronization signal according to some embodiments.

[0015] Figure 4 is a schematic diagram of another first public message and synchronization signal according to some embodiments.

[0016] Figure 5 is a schematic diagram of another first public message and synchronization signal according to some embodiments.

[0017] Figure 6 is a schematic diagram of another first public message and synchronization signal according to some embodiments.

[0018] Figure 7 is a schematic diagram of another first public message and synchronization signal according to some embodiments.

[0019] Figure 8 is a schematic diagram of another first public message and synchronization signal according to some embodiments.

[0020] Figure 9 is a schematic diagram of determining RSRP according to some embodiments.

[0021] Figure 10 is a flowchart of another message transmission method according to some embodiments.

[0022] Figure 11 is a schematic diagram of a first public message and a second public message according to some embodiments.

[0023] Figure 12 is a schematic diagram of another first public message and a second public message according to some embodiments.

[0024] Figure 13 is a schematic diagram of another first public message and a second public message according to some embodiments.

[0025] Figure 14 is a flowchart of another message transmission method according to some embodiments.

[0026] Figure 15 is a block diagram of a communication device according to some embodiments.

[0027] Figure 16 is a block diagram of another communication device according to some embodiments.

[0028] Figure 17 is a block diagram of another communication device according to some embodiments. Detailed Implementation

[0029] The technical solutions of this disclosure will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0030] Unless the context otherwise requires, throughout the specification and claims, the term "comprise" and its other forms, such as the third-person singular "comprises" and the present participle "comprising," are interpreted as open-ended and encompassing, meaning "including, but not limited to." In the description of the specification, terms such as "one embodiment," "some embodiments," "exemplary embodiments," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0031] It should be noted that, in this disclosure, the words "exemplarily" or "for example" are used to indicate examples, illustrations, or explanations. Any embodiment or design described as "exemplarily" or "for example" in this disclosure should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the words "exemplarily" or "for example" is intended to present the relevant concepts in a specific manner.

[0032] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0033] In the description of this disclosure, unless otherwise stated, " / " means "or," for example, A / B can mean A or B. "And / or" in this document is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, and B alone. Furthermore, "at least one" means one or more, and "more than one" means two or more.

[0034] In this disclosure, suffixes such as “module,” “part,” or “unit” used to represent elements are used only for the purposes of this application and have no inherent meaning. Therefore, “module,” “part,” or “unit” can be used interchangeably.

[0035] In traditional communication systems, public messages include system messages and paging messages. System messages are periodically broadcast via the broadcast control channel (BCCH) to deliver basic network and cell configurations to all user equipment (UEs). System messages are divided into two categories: 1. Master Information Block (MIB), providing the most basic system information; 2. System Information Block (SIB), providing more detailed system configuration information. Paging messages, on the other hand, are used to notify specific UEs, carrying event commands (such as service requests, system updates, emergency information, etc.); they are dynamically sent via the paging control channel (PCCH) to save UE power consumption.

[0036] The MIB (Multi-Input Browser) is transmitted on the physical broadcast channel (PBCH) with a period of 20 milliseconds (ms), combined with a synchronization signal, on specific time and frequency resources. The transmission location is determined by the subcarrier spacing (SCS) and cell configuration. It includes the following configuration information:

[0037] (1) System Frequency Number (SFN): The system frame number of the current cell, used to synchronize the UE's frame structure. 10 bits, representing 0 to 1023;

[0038] (2) Carrier bandwidth portion (e.g., bandwidth part (BWP) configuration): Initial BWP configuration for the cell, including frequency location and size. Used to inform the UE of the initial downlink carrier bandwidth range;

[0039] (3) Subcarrier spacing (SCS): The initial SCS of the cell (15 / 30 / 60kHz, etc.) helps the UE determine the frequency domain distribution of physical resources.

[0040] (4) Synchronization signal block (SSB) configuration (SS / PBCH Block Configuration): Provides configuration information for the synchronization signal block (SSB), including the SSB period and offset. This helps the UE determine the time and frequency location of the synchronization signal block, thereby accurately decoding the PBCH.

[0041] (5) Number of antenna ports: The number of antenna ports in the cell. Helps the UE determine the parameters for channel demodulation.

[0042] (6) SS / PBCH signal strength information: including power control parameters related to cell selection, such as the measurement benchmark of SS-reference signal received power (RSRP). This helps the UE select the best cell in a multi-cell scenario.

[0043] (7) Cell-specific information: including the cell identifier (Cell ID).

[0044] (8) Modulation information: The modulation method of PBCH is quadrature phase shift keying (QPSK), and the MIB length is fixed at 24 bits.

[0045] For Paging-PDSCH (PCCH): there are two parameters: paging cycle and paging occasion. The UE listens for paging messages within a specific time interval according to the discontinuous reception (DRX) cycle. Each UE has a specific time window to listen for paging messages. The paging process is as follows: 1) The core network generates a paging request, including the UE identifier and paging reason; 2) The base station broadcasts the paging message through the PCCH; 3) The UE decodes the paging message to determine whether a response or action is required.

[0046] (1) Paging UE Identity: A unique identifier for the paged UE, including the following two types: 1) 5G-S-TMSI (5G SAE Temporary Mobile Subscriber Identity): A temporary identifier used to protect the UE's privacy. 2) IMSI (International Mobile Subscriber Identity): An international mobile subscriber identity, typically used less frequently in the network to protect user privacy. Function: To confirm to the paged UE that the message is addressed to them.

[0047] (2) Discontinuous reception (DRX) information: Specifies the UE's paging cycle and paging occasion. Purpose: Helps the UE save power in idle mode by listening for paging messages only within a specific time window.

[0048] (3) System message update indication: Indicates whether there are system message updates in the network and whether the UE needs to reacquire the latest system message (such as SIB1). Function: Ensures that the UE obtains the latest system information.

[0049] (4) Paging Cause: Specifies the reason for paging, such as: service request from the core network (e.g., telephone, data service), system message update, emergency alarm (e.g., earthquake or disaster information). Purpose: To help the UE determine the type of paging event.

[0050] (5) Emergency Information Notification: In special emergency situations, paging messages may contain instructions for emergency broadcast information.

[0051] Regarding the System Information Block (SIB) – Physical Downlink Shared Channel (PDSCH) (BCCH): This is information broadcast by the network to all UEs. SIB1 is the most important system information block, used for network access. Other SIBs (such as SIB2-SIBn) carry more specific information as needed. Transmission mechanisms: 1) SIB scheduling: SIB transmission is periodic; the UE receives relevant information according to the scheduling period configured by the network. 2) Dynamic system message updates: The network can instruct the UE to check for system message updates through paging. For example, Table 1 shows the information carried by the SIBs and their functions.

[0052] Table 1

[0053] In passive Internet of Things (A-IoT) communication, the reader-to-device (R2D) link uses OFDM-based on-off keying (OOK) modulation waveforms to transmit downlink signals, while the device-to-reader (D2R) link uses a single carrier (including single-tone or multiple single-tones) to transmit uplink signals. For the downlink / R2D link, one orthogonal frequency division multiplexing (OFDM) symbol duration (excluding the cyclic prefix (CP)) includes M OOK symbols (1≤M≤32).

[0054] Here, a passive Internet of Things (IoT) system may include a radio frequency identification (RFID) system, in which the reader sends paging messages through the physical layer or data link layer to wake up or activate the tag, or selectively communicate with a specific tag, or notify the tag to perform a specific task.

[0055] However, transmission resources are relatively scarce in passive IoT systems. Transmitting multiple common messages separately will consume a lot of transmission resources, such as time domain resources. Therefore, the following two aspects need to be considered for the transmission of downlink common messages:

[0056] 1) To ensure efficient operation, it is necessary to simplify the public message transmission process and design reasonable public configuration information. Here, the public message transmission process includes designing different types of public messages and different transmission channels according to different purposes. Here, the public configuration information includes general cell information, device-specific information, public message type, public message scheduling information, cell selection, cell access, and power control-related configuration parameter definitions, so as to avoid unnecessary signaling overhead and achieve efficient configuration.

[0057] 2) To achieve flexible management, multiple transmission methods are designed, including the transmission format of common messages (e.g., control + master information, pilot + master information) and periodic / non-periodic transmission timing. For example, the transmission timing of a common message can be associated with the transmission timing of synchronization signals or other common messages to reduce time-domain resource overhead.

[0058] To address this, this disclosure provides a message transmission method in which a first node can send a first message, including a first common message and / or a second common message, to a second node. Here, the first common message corresponds to all types of devices; the second common message corresponds to a target device, which is a device of a target type or a device within a target device group. The first message can transmit both the first common message corresponding to all types of devices and the second common message corresponding to the target device. In this way, different types of common messages can be carried within the first message, thereby saving transmission resources.

[0059] The message transmission method provided in this disclosure can be applied to systems with various communication standards. For example, the message transmission method provided in this disclosure can be applied to systems including, but not limited to, long-term evolution (LTE) systems, various versions based on LTE evolution, 5G systems, future mobile communication networks (such as 6G), or multiple converged communication systems. Furthermore, the message transmission method provided in this disclosure can also be applied to future-oriented communication systems.

[0060] For example, the above message transmission method can be applied to the communication system shown in FIG1. ​​As shown in FIG1, the communication system includes: a first node 101 and a second node 102.

[0061] Here, the first node 101 can be a network-side device such as a reader. The second node 102 can be a UE-side device such as a tag. It should be noted that UE-side devices such as tags can also be simply referred to as devices, and in this embodiment, "device" refers to the second node.

[0062] In some embodiments, the first node 101 may send a first message to the second node 102, including a first public message and / or a second public message. Here, the first public message corresponds to all types of devices; the second public message corresponds to a target device, which is a device of a target type or a device in a target device group. The first message can transmit both the first public message corresponding to all types of devices and the second public message corresponding to the target device. In this way, different types of public messages can be carried in the first message, thereby saving transmission resources.

[0063] It should be noted that Figure 1 is only an exemplary framework diagram. The number of communication devices included in Figure 1 and the names of each communication device are not limited. In addition to the communication devices shown in Figure 1, the communication system may also include other communication devices, such as relay nodes.

[0064] The application scenarios of the embodiments disclosed herein are not limited. The system architecture and business scenarios described in the embodiments of this disclosure are for the purpose of more clearly illustrating the technical solutions of the embodiments of this disclosure, and do not constitute a limitation on the technical solutions provided by the embodiments of this disclosure. As those skilled in the art will know, with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided by the embodiments of this disclosure are also applicable to similar technical problems.

[0065] The message transmission method provided by the embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0066] The message transmission method provided in this embodiment can be applied to the first node 101 in the communication system shown in FIG1. ​​FIG2 shows a flowchart of a message transmission method, which includes the following steps S201.

[0067] In S201, the first message is sent to the second node.

[0068] Here, the first message includes a first common message and / or a second common message. The first common message corresponds to all types of devices. The second common message corresponds to the target device, which is a device of the target type or a device in the target device group.

[0069] The first common message corresponds to all types of devices, meaning it applies to all devices, while the second common message corresponds to the target device, meaning it only applies to a specific device. Here, the target device is either a device of the target type or all devices within the target device. The first message can transmit both the first common message corresponding to all types of devices and the second common message corresponding to the target device. In this way, different types of common messages can be carried in the first message, thereby saving transmission resources.

[0070] Furthermore, by integrating the parameters corresponding to multiple public messages into a single first message, signaling overhead can be reduced, thereby improving transmission efficiency.

[0071] The first public message and the second public message will be described below.

[0072] I. First Public Message

[0073] In some embodiments, the first public message includes first configuration information, which includes at least one of the following: cell identifier, synchronization signal transmission configuration, first public message transmission configuration, first public message change indication, cell selection parameters, cell reselection parameters, information type of the second public message, time-domain resource configuration of the second public message, second public message change indication, target notification message, and access configuration parameters. Here, the first configuration information is A-IoT general configuration information, applicable to all second nodes.

[0074] 1.1 Cell ID, used to indicate the identification number of the cell where the device (i.e., the second node) is located or the identification number of the cell where the first public message transmission is located.

[0075] 1.2. The transmission configuration of the synchronization signal is used to indicate at least one of the following: the transmission period of the synchronization signal, the transmission duration, the transmission frequency position, the transmission bandwidth, the transmission chip duration, the total transmission time length corresponding to one synchronization signal, the total number of transmission chips corresponding to one synchronization signal, the synchronization sequence index, and the encoding or modulation method of the synchronization sequence.

[0076] In one possible implementation, the transmission configuration of the synchronization signal includes a time-domain resource configuration for the downlink synchronization signal; used to indicate at least one of the following: transmission period, transmission duration, transmission timing, time offset, maximum transmission duration, minimum transmission duration, M value, frequency position, number of chips within one original bit transmission duration, or synchronization sequence index. Here, the time offset is used to determine the starting position of the transmission period, transmission duration, or transmission timing. The unit of transmission duration includes OFDM symbols or chips.

[0077] 1.3. Transmission configuration of the first common message, which includes at least one of the following: the time interval between the first common message and the synchronization signal, the transmission period of the first common message, the transmission duration of the first common message, the transmission bandwidth of the first common message, the transmission frequency position of the first common message, the frequency offset of the first common message, the modulation method of the first common message, the M value of the first common message, and the transmission chip length of the first common message. Here, the device receives the first common message during the transmission timing of the first common message transmission period.

[0078] Furthermore, the first node may modify one or more configuration information pieces in the first configuration information set carried within the transmission time of the first public message transmission cycle. That is, the first node may send the modified first public message at a certain transmission time within the transmission cycle, and the parameter types included in the first configuration information of the modified first public message are different from those included in the first configuration information of the first public message before the modification.

[0079] Example 1, as shown in Figures 3(a) and (b), involves the first common message and the synchronization signal sharing the same transmission frequency and bandwidth, with the bandwidth being narrowband transmission, smaller than the downlink system transmission bandwidth. The first common message and the synchronization signal have the same transmission period, and there is a predefined time interval between their transmission timing or transmission start position. In Figure 3(a), the first common message uses frequency division multiplexing (FDM) transmission mode during its transmission duration, suitable for devices supporting downlink narrowband transmission to receive the first common message on the downlink narrowband corresponding to the detected synchronization signal. In Figure 3(b), the first common message uses both time division multiplexing (TDM) and frequency division multiplexing (FDM) transmission modes during its transmission duration, supporting the coexistence of multiple device types. This effectively prevents devices supporting downlink broadband transmission from receiving signals from multiple frequency positions simultaneously, thus reducing the risk of false detection.

[0080] Example 2, as shown in Figure 4, involves the first common message and the synchronization signal sharing the same transmission frequency and bandwidth, with the latter being wideband transmission. The transmission period of the first common message is longer than that of the synchronization signal, and there is a predefined time interval between the transmission timing / start position of the first common message and the synchronization signal. Here, the number of times the first common message is repeatedly transmitted is not less than 1 and not greater than the ratio of the transmission duration of the first common message to its total transmission time. The number of frequency domain resources / resource elements (REs) for the synchronization signal transmission is the same as the number of frequency domain resources / REs for the first common message transmission.

[0081] Example 3, as shown in Figure 5, has the same transmission frequency and bandwidth as the synchronization signal, and the transmission bandwidth is narrowband, less than the downlink system transmission bandwidth. The first common message and the synchronization signal have the same transmission period. A predefined time interval is included between the transmission timing / start position of the first common message and the synchronization signal. Here, the number of times the first common message is repeatedly transmitted is not less than 1 and not greater than the ratio of the first common message transmission duration to the total transmission time of the first common message. To ensure correct reception of the first common message, one or more synchronization signal transmissions with a time interval not greater than T precede the transmission of a first common message. Here, T is not less than the predefined time interval and not greater than the transmission period of the synchronization signal / first common message. Here, the number of frequency domain resources / REs transmitted by the synchronization signal is consistent with the number of frequency domain resources / REs transmitted by the first common message. This synchronization signal is transmitted using time division multiplexing (TDM) and frequency division multiplexing (FDM), supporting synchronization for various device types. Devices supporting downlink broadband transmission do not require general information configuration for the first common message; therefore, the first common message is transmitted using FDM, supporting devices with downlink narrowband transmission capabilities.

[0082] Example 4, as shown in Figure 6, shows that the transmission frequency and bandwidth of the first common message and the synchronization signal are consistent, and the transmission bandwidth is wideband transmission. The transmission periods of the first common message and the synchronization signal are the same. A predefined time interval is included between the transmission timing / start position of the first common message and the synchronization signal. Here, the number of times the first common message is repeatedly transmitted is not less than 1 and not greater than the ratio of the transmission duration of the first common message to the total transmission time of the first common message. To ensure correct reception of the first common message, one or more synchronization signal transmissions with a time interval not greater than T precede the transmission of a first common message. For example, T is not less than a predefined time interval and not greater than the transmission period of the synchronization signal / first common message. Here, the transmission frequency position of the first common message can be determined based on the sequence index of the synchronization signal. The synchronization signal is TDM transmission, which supports synchronization for various device types; devices supporting downlink wideband transmission do not require general information configuration for the first common message, so the first common message is FDM transmission, supporting devices with downlink narrowband transmission capabilities.

[0083] Example 5, as shown in Figure 7, has the same transmission frequency and bandwidth as the synchronization signal. Here, the number of frequency domain resources / REs for the synchronization signal transmission is the same as the number of frequency domain resources / REs for the first common message transmission. The first common message is not less than the transmission period of the synchronization signal, or the period of the first common message is an integer multiple of the period of the synchronization signal. A predefined time interval is included between the transmission timing / start position of the first common message and the synchronization signal. Here, the number of times the first common message is repeatedly transmitted is not less than 1 and not greater than the ratio of the duration of the first common message transmission to the total transmission time of the first common message. To ensure correct reception of the first common message, one or more synchronization signal transmissions with a time interval not greater than T precede the transmission of a first common message. Here, T is not less than the predefined time interval and not greater than the transmission period of the synchronization signal. The synchronization signal is transmitted using TDM and FDM, supporting synchronization for various device types. Devices supporting downlink broadband transmission do not require general information configuration for the first common message; therefore, the first common message is transmitted using FDM, supporting devices with downlink narrowband transmission capabilities.

[0084] Example 6, as shown in Figure 8, has the same transmission frequency and bandwidth as the synchronization signal, and the transmission bandwidth is wideband. The first common message is not less than the transmission period of the synchronization signal, or the period of the first common message is an integer multiple of the period of the synchronization signal. A predefined time interval is included between the transmission timing / start position of the first common message and the synchronization signal. Here, the number of times the first common message is repeatedly transmitted is not less than 1 and not greater than the ratio of the transmission duration of the first common message to the total transmission time of the first common message. To ensure correct reception of the first common message, one or more synchronization signal transmissions with a time interval not greater than T precede the transmission of a first common message. Here, T is not less than the predefined time interval and not greater than the transmission period of the synchronization signal. Here, the transmission frequency position of the first common message can be determined based on the sequence index of the synchronization signal.

[0085] 1.4. A first public message change indication, used to indicate at least one of the following: changing (also known as updating or switching) the first public message transmission configuration, the first public message change period, the transmission timing within the first public message change period, the frequency domain transmission resources of the first public message after the change, or changing the first configuration information of the first public message within the first period or the first transmission timing (i.e., one or more configuration information in the first configuration information carried by the first public message update within a specific period or a specific transmission timing). Here, the first period is a specific period or a predefined period, and the first transmission timing is a specific transmission timing or a predefined transmission timing. The specific period or the specific transmission timing includes at least one of the following: the next first public message transmission period, the next first public message transmission timing, the predefined first public message transmission period, and the predefined first public message transmission timing.

[0086] 1.5 Cell Selection Parameters: These parameters indicate the RSRP / Received Signal Strength Indicator (RSSI) / Reference Signal Received Quality (RSRQ) threshold / offset required for the device to perform cell selection. Here, RSRP is the linear average of the received power of the OOK high level on the frequency domain resources (corresponding to one or more REs) where the device receives the downlink synchronization signal, or the linear average received power of the OOK high level over one OFDM symbol duration or M chip durations. RSSI is the linear average of the total received power of the high and low levels of the OOK symbol on the frequency domain resources (corresponding to one or more REs) where the device receives the downlink synchronization signal, or the linear average of the total received power of the high and low levels of the OOK symbol over one OFDM symbol duration or M chip durations. RSRQ is the ratio between RSRP and RSSI.

[0087] It should be noted that, since the cell selection parameters are configured with a threshold for accessing the cell, although most devices can detect the synchronization signal, and the cell selection parameters configured in the first common message are applicable to all devices that want to access the cell, only some devices that meet the threshold setting conditions can actually access the cell.

[0088] Example 7, as shown in Figure 9, involves a device determining the RSRP within the transmission bandwidth based on the average power of the high-level signal over a predefined duration. For example, Here, N is the number of OOK symbols corresponding to a high level within a predefined duration, and P... i Let be the power of the i-th high level. Here, the predefined duration is an integer multiple of the OFDM symbol duration (including or excluding CP), or an integer multiple of the duration of M chips, or an integer multiple of the sum of the duration of M chips and the CP duration, or the total duration of the synchronization signal transmission. Here, the predefined duration is not greater than the total duration of the synchronization signal transmission, the duration of the synchronization signal transmission, or the period of the synchronization signal transmission.

[0089] 1.6 Cell reselection parameters, used to indicate the minimum / maximum / threshold / offset of RSRP / RSSI / RSRQ required for the device to perform cell reselection (including mobile-based RSRP / RSSI / RSRQ measurements). The device performs a cell reselection operation in response to a first event. Here, the first event includes at least one of the following: within a first predefined time period, the RSRP / RSSI / RSRQ of the cell in which the device is located is below the minimum value; within a second predefined time period, the RSRP / RSSI / RSRQ of neighboring cells in the cell in which the device is located is above the maximum value; the number of device connections in the cell in which the device is located reaches the upper limit; or the device is not allocated corresponding time or frequency domain resources in the cell in which it is located. Here, the cell reselection operation includes at least one of the following: the device detects the synchronization signal of the current cell and / or neighboring cells; reselects a cell based on the RSRP / RSSI / RSRQ values ​​corresponding to cells in the cell list; performs cell handover; or receives a first common message at a specific frequency location. The difference between the RSRP / RSSI / RSRQ of neighboring cells (excluding the current cell) and the current cell in the cell list is not less than the offset value.

[0090] Here, the first predefined duration is not less than 160ms or one or more synchronization signal cycle durations; here, the second predefined duration is not less than the first predefined duration or one or more synchronization signal cycle durations. Here, if the duration for which the RSRP / RSSI / RSRQ of the cell where the device is located is below the minimum value is less than the first predefined duration, the device stops measurement and continues to camp or maintain the connection with the current cell; here, if the duration for which the RSRP / RSSI / RSRQ of a neighboring cell of the cell where the device is located is above the maximum value is less than the second predefined duration, the device stops measurement in that neighboring cell, continues to camp or maintain the connection with the current cell, and starts measurement in other neighboring cells.

[0091] 1.7 The information type of the second public message, used to indicate at least one of the following: whether there is a transmission opportunity for the second public message or a physical device to reader channel (PDRCH) transmission opportunity within the transmission period of the first public message; whether there is a transmission opportunity for the second public message or a PDRCH transmission opportunity after the end position of the first public message transmission; the target device group information carried by the second public message; the information type carried by the second public message. That is, whether a second public message will be transmitted after the current first public message.

[0092] Here, the information type includes at least one of the following: system information (SI), paging messages, information indicating cell access or random access, or device-specific data. The information type can also be understood as the parameter type in the first configuration information or the second configuration information.

[0093] For example, when a device initially accesses a cell, it must first receive a first public message, and then receive a related second public message (only the target device can receive the second public message). The first public message indicates the type of information carried by the second public message, making it easier for the device to identify the second public message (e.g., a target device group identifier).

[0094] 1.8. Time-domain resource configuration of the second common message; used to indicate at least one of the following: transmission period, transmission duration, transmission timing, time offset, maximum transmission duration, and minimum transmission duration of the second common message. Here, the time offset is used to determine the starting position of the transmission period, transmission duration, or transmission timing. The unit of transmission duration includes OFDM symbols or chips. The device receives the second common message within the transmission timing of the second common message's transmission period. The first node may modify one or more configuration information in the second configuration information of the second common message carried within the transmission timing of the second common message's transmission period.

[0095] 1.9 Second public message change indication, used to indicate at least one of the following: changing the transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, or changing the second configuration information of the second public message within the second period or the second transmission timing.

[0096] Here, the second period is a specific period or a predefined period, and the second transmission timing is a specific transmission timing or a predefined transmission timing. The specific period or specific transmission timing includes at least one of the following: the next first public message transmission period, the next first public message transmission timing, the predefined first public message transmission period, or the predefined first public message transmission timing.

[0097] 1.10 Target notification messages, such as emergency message notifications, are used to broadcast emergency alarms, including natural disasters such as fires, snowstorms, earthquakes and tsunamis, or changes in the working environment within the community such as air pressure, pressure values, temperature, movement speed, and location changes.

[0098] 1.11. Access configuration parameters, used to indicate at least one of the following: scheduling information for the device to send message 1 (Msg1) and / or message 3 (Msg3); scheduling information for the device to receive message 2 (Msg2) and / or message 4 (Msg4); time-domain resources for initiating access; and time window for waiting for access response. Here, the access process is an access process initiated by the device. The time-domain resources for initiating access include at least one of the following: the start position of the time window used to transmit Msg1 or the pilot sequence; the duration of the time window; the end position of the time window; and the time window index.

[0099] II. Second Public Message

[0100] In some embodiments, the second public message includes second configuration information, which includes at least one of the following: target device type, target device group identifier, transmission bandwidth configuration, wake-up information, response event type corresponding to the wake-up information, change indication of the first public message, transmission configuration of the second public message, change indication of the second public message, allocated time domain resource configuration, power control parameters, or target notification message.

[0101] 2.1 Target Device Type: This indicates the device type that can receive the second common message. Here, device types are classified according to power consumption level or the bandwidth of the second common message transmission that can be supported, including two or three device types.

[0102] 2.2 Target device group identifier or target device identifier, used to indicate one or more devices that can receive the second common message. Here, multiple devices in the same device group satisfy at least one of the following: the downlink transmission mode (e.g., FDM or TDM) is the same; they have the same transmission resources (frequency domain or time domain transmission resources) for the second common message; they have the same modulation scheme; they have the same frequency offset (also known as frequency shift parameter R); the bit state or bit value of the target position corresponding to the target device group identifier in the second common message is the same (i.e., the bit state or value of the corresponding device ID / random sequence (RN) sequence / electronic product code (EPC) is the same at a specific position); they have the same intermediate node (or intermediate UE); the uplink transmission mode is different; the uplink transmission resources (e.g., frequency domain or time domain transmission resources with different PDRCHs) are different.

[0103] Here, the specific positions of the device ID / RN sequence / EPC corresponding to the device include the first n consecutive bit positions, the last n consecutive bit positions, the first n even bit positions, the last n even bit positions, the first n odd bit positions, and the last n odd bit positions. The modulo operation between each device ID and the device group ID in a group of devices yields the same value. For example, a device group ID is configured in the second public message. Devices whose IDs in the same device group have specific bit positions equal to the device group ID are grouped together. For example, a 4-bit device group ID: 0010. Therefore, devices with the same 16-bit device serial number (high four bits being 0010) belong to the same device group: 0010 xxxx xxxx xxxx.

[0104] The uplink transmission mode includes at least one of the following: uplink and downlink transmission are time-division multiplexing, uplink and downlink transmission are frequency-division multiplexing, uplink transmissions are time-division multiplexing, uplink transmissions are frequency-division multiplexing, and uplink transmissions are code-division multiplexing.

[0105] The uplink transmission resources include at least one of the following: uplink transmission pilot sequence, uplink transmission time domain location, Msg1 / Msg3 transmission time window, Msg2 / Msg4 reception time window, uplink transmission frequency shift coefficient, and uplink transmission frequency domain resources.

[0106] It should be noted that multiple devices in the same device group can default to using the same channel for transmitting paging messages and receiving downlink data, thereby reducing frequent device switching and lowering energy consumption.

[0107] 2.3 Transmission bandwidth configuration, used to indicate the transmission frequency position and transmission bandwidth of the target device. For example, indicating that the downlink transmission bandwidth of the target device is consistent with the transmission frequency position and / or transmission bandwidth of the associated synchronization signal; indicating the transmission bandwidth and transmission frequency position of the target device. For example, indicating the uplink transmission frequency position and / or transmission bandwidth of the target device, where the transmission frequency position is determined according to the frequency shift parameter R and the center frequency position, or the frequency offset between the transmission frequency position and the center frequency position is determined according to the frequency shift parameter R.

[0108] 2.4 Wake-up information, used to wake up the target device to execute response event types; the response event types include at least one of the following: wake-up information response operation, operation to start random access procedure, operation to send first random access message, operation to receive second random access message, enter cell reselection mode, enter cell handover decision mode, enter cell handover mode, enter inventory mode, enter read / write mode, enter authentication mode, enter backscatter transmission mode, enter positioning mode, start backscatter-based positioning signal transmission operation, and feedback device identification operation.

[0109] In other words, the wake-up message is used to wake up the target device to perform a specific operation, which is an operation that responds to an event. Here, the target device includes at least one of the following: a device of a certain device type, a device with a device ID, or a group of devices with a device group ID. The first random access message can be Msg1 / Msg3, and the second random access message can be Msg0 / Msg2.

[0110] 2.5. The response event type corresponding to the wake-up message is used to indicate one or more operations in a specific operation.

[0111] In one possible implementation, when the response event type is used to indicate the initiation of a backscatter-based positioning signal transmission operation, the second public message includes transmission frequency offset information (Δf or R) or phase offset information (Δp) of the backscatter-based positioning signal.

[0112] Alternatively, if the response event type indicates at least one of the following operations: initiating a random access procedure, entering inventory mode, entering read-write mode, entering authentication mode, sending a first random access message, or receiving a second random access message, the second common message includes a downlink transmission resource allocation indication (i.e., a downlink transmission time resource and / or frequency domain resource allocation indication). The access procedure is a device-initiated access procedure. The time domain resources for initiating access include at least one of the following: the start position of the time window for transmitting Msg1 or the pilot sequence, the duration of the time window, the end position of the time window, and the time window index.

[0113] Alternatively, where the response event type is used to indicate the operation of initiating a random access procedure, the second common message includes access configuration parameters. These access configuration parameters include at least one of the following: scheduling information sent by the device to Msg1 and / or Msg3; scheduling information received by the device to Msg2 and / or Msg4; time-domain resources for initiating access; and a time window for waiting for an access response.

[0114] Alternatively, in cases where the response event type is used to indicate the operation of sending the first random access message or the operation of feedback device identification, the second common message includes an uplink transmission resource allocation indication (i.e., an uplink transmission time resource and / or frequency domain resource allocation indication).

[0115] Alternatively, if the response event type indicates at least one of entering cell reselection mode, cell handover decision mode, or cell handover mode, the second public message includes cell reselection parameters (i.e., the dynamic threshold / offset values ​​of RSRP / RSSI / RSRQ required for cell reselection). The dynamic threshold / offset value is used to determine whether to select a neighboring cell for access; here, the difference between the RSRP / RSSI / RSRQ values ​​of the neighboring cell and the current cell is not less than the dynamic offset. For example, after receiving the response event type indication, the target device initiates an RSRP / RSSI / RSRQ measurement operation based on the synchronization signal.

[0116] Here, the resource allocation indication includes at least one of the following: transport block size (TBS) indication, TBS indication field width, first TBS indication, second TBS indication, coding scheme, coding rate, and modulation scheme. The first TBS indication is used to indicate that the device blindly detects a physical downlink shared channel (PDSCH) carrying at least one target TBS. The first TBS indication (also known as the small TBS, i.e., a TBS less than Z) is used by the device to blindly detect a PRDCH carrying one or more specific TBSs, where the specific TBS does not exceed Z or the PRDCH of the specific TBS does not include cyclic redundancy check (CRC) information, where Z is not greater than 24. The second TBS can also be called the large TBS, i.e., a TBS greater than or equal to Z. The TBS indication field is used to indicate TBSs greater than Z.

[0117] Here, the downlink modulation method is OOK modulation, and one OFDM symbol includes M OOK symbols. The candidate M values ​​corresponding to the OOK modulation method include at least one from the set of M values ​​{1, 2, 4, 6, 8, 12, 16, 24, 32}. When the downlink sampling rate is 1.92MHz, under the condition of subcarrier spacing SCS = 15kHz, the total number of sampling points corresponding to one OFDM symbol is 128, and the number of sampling points per chip corresponding to each M value in the set of M values ​​is {128, 64, 32, 21 or 22, 16, 10 or 11, 8, 5 or 6, 4}. Due to the sampling frequency offset caused by the device hardware, the number of sampling points will have a deviation of 0-10%. That is, when M = 12, the number of sampling points of one chip on the device side may be 9, 10, 11 or 12. The device is prone to confusing M = 12 and M = 16. The same problem occurs between M = 6 and 8, and M = 24 and 32. To avoid the problem of the device being unable to accurately determine the M-value configuration due to the approximate chip lengths corresponding to different downlink M-value configurations, the candidate M-values ​​for downlink SIP, CAP, and corresponding data transmission are non-contiguous M-values ​​in the M-value set. For example, at least one of {1, 2, 4, 8, 16, 24} or {1, 2, 4, 8, 16, 32} or {1, 2, 4, 6, 12, 24} or {1, 2, 4, 6, 12, 32} or {1, 2, 4, 6, 8, 12, 24} or {1, 2, 4, 6, 8, 12, 32} or {1, 2, 4, 6, 8, 16, 24} or {1, 2, 4, 6, 8, 16, 32}.

[0118] The M value indicates the number of OOK symbols within one OFDM symbol duration in the downlink, or the number of OOK symbols that can be carried on the downlink transmission frequency domain resources. Here, the M value is selected from a set of candidate M values; for example, the element values ​​in the M value set are a subset of {1, 2, 4, 6, 8, 12, 16, 24, 32}. The design of the M value set needs to consider the following: if the chip lengths corresponding to adjacent element values ​​in the downlink candidate M values ​​are approximately equal or have small differences, such as under SCS = 15kHz conditions, the chip lengths corresponding to M = 12 and M = 16 are 5.56µs and 4.17µs respectively, and the downlink sampling rate offset is 10... 5At ppm, the chip length offset corresponding to M=12 can reach ±0.56µs, which will obviously cause the device to misjudge M=12 as M=16 based on the chip length. Therefore, the set of M values ​​should avoid combinations such as M values ​​6 and 8, M values ​​12 and 16, and M values ​​24 and 32. For example, the set of M values ​​is {1, 2, 4, 6, 12, 24}, {1, 2, 4, 8, 12, 24}, {1, 2, 4, 6, 16, 24}, {1, 2, 4, 6, 12, 32}, {1, 2, 4, 8, 16, 24}, {1, 2, 4, 6, 16, 32}, {1, 2, 4, 8, 12, 32}, {1, 2, 4, 8, 16 ... At least one of {4, 6, 8, 12, 24}, {1, 2, 4, 6, 8, 12, 24}, {1, 2, 4, 6, 8, 16, 24}, {1, 2, 4, 6, 8, 12, 32}, {1, 2, 4, 6, 8, 16, 24}, {1, 2, 4, 6, 8, 16, 32}, {1, 2, 4, 6, 8, 12, 32}, {1, 2, 4, 6, 8, 16, 32}.

[0119] 2.6 First Public Message Change Instruction, the first public message change instruction is used to instruct at least one of the following:

[0120] The transmission configuration of the first public message, the change period of the first public message, the transmission timing within the change period of the first public message, the frequency transmission resources of the first public message after the change, and the first configuration information of the first public message within the first period or the first transmission timing are changed.

[0121] Here, the first period is a specific period or a predefined period, and the first transmission timing is a specific transmission timing or a predefined transmission timing. A specific period or a specific transmission timing includes at least one of the following: the next first common message transmission period, the next first common message transmission timing, a predefined first common message transmission period, and a predefined first common message transmission timing. The update of one or more configuration information includes at least one of the following configuration information: time-domain resource configuration, frequency-domain resource configuration, modulation scheme, response event type, and related parameter configuration.

[0122] 2.7 Second Common Message Transmission Configuration: The transmission configuration of the second common message includes at least one of the following:

[0123] The time interval between the second public message and the synchronization signal that is closest (i.e., associated / closest) in the time domain;

[0124] The time interval between the first public message and the second public message that is the most recent first public message in the time domain;

[0125] The frequency interval between the first public message or synchronization signal that is the closest in the time domain to the second public message;

[0126] The transmission cycle of the second public message;

[0127] The frequency offset of the second common message (also known as the transmission frequency shift parameter);

[0128] The modulation method of the second public message;

[0129] The M value of the second public message;

[0130] The chip length of the second public message.

[0131] Here, the device receives the second public message during the transmission period of the second public message transmission cycle. For example, the first node may change one or more configuration information in the second configuration information set carried during the transmission period of the second public message transmission cycle.

[0132] 2.8 Second Public Message Change Instruction, the second public message change instruction is used to indicate at least one of the following: change the transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, or change the second configuration information of the second public message within the second period or the second transmission timing.

[0133] Here, the second period is a specific period or a predefined period, and the second transmission timing is a specific transmission timing or a predefined transmission timing. The specific period or specific transmission timing includes at least one of the following: the next second public message transmission period, the next second public message transmission timing, the predefined second public message transmission period, and the predefined second public message transmission timing.

[0134] The change period of the first public message / second public message is an integer multiple of the transmission period of the first public message / second public message, or not less than the transmission period of the first public message / second public message, wherein the change period of the first public message / second public message is not greater than 640ms or 1s.

[0135] 2.9. The allocated time-domain resource configuration indicates the time resources allocated to the target device in Time Division Multiple Access (TDMA) mode. For example, time resources are time windows, which consist of a continuous minimum time unit, each with an identification number (ID). A device determines its allocated time window based on a modulo operation with an offset, or devices in a group may use their configured time windows as a common time window. One or more devices receive Msg2 within the common time window. Based on the received Msg2 from the current device, the device determines the identification number corresponding to the time window in which Msg2 is located. The device uses the time window corresponding to the identification number in subsequent time resource configuration periods as uplink transmission time resources.

[0136] 2.10 Power control parameters, which indicate any of the following: the power ratio per unit resource between the preamble of the second common message and the target information; the target information being control information or data information; the data information including the second configuration information; the power ratio per unit resource between the second common message and the most recent synchronization signal or the first common message in the time domain; and the transmit power range of the synchronization signal, the first common message, or the second common message.

[0137] Here, a unit resource includes at least one of the following: a time-domain resource within the signal transmission bandwidth, a time length corresponding to a predefined number of OFDM symbols, a time length corresponding to a predefined number of chips, and a predefined number of resource particles. For example, the number of predefined OFDM symbols and the number of predefined chips are integers not less than 1. For example, the time length corresponding to the number of predefined OFDM symbols and the number of predefined chips is not greater than the total transmission time of the second common message. For example, the number of predefined resource particles is not less than 1 and is not greater than the total number of resource particles corresponding to at least one of the transmission frequency-domain resources of the second common message, the first common message, and the synchronization signal. For example, the power ratio per unit resource is between -16dB and 16dB.

[0138] The power ratio per unit resource is the average energy per resource particle (EPRE), defined as the ratio of the average transmit power of a high-level signal in the time domain to the power of the frequency domain resource. Here, the time domain resource includes the number of high-level signals or the number of chips corresponding to high-level signals. The frequency domain resource includes the total number of frequency-domain REs divided by M, or the average number of REs per chip. For example, For example, N is the total number of chips corresponding to the statistical high level, M is the number of chips transmitted in one OFDM symbol, and E i N represents the total energy in the time domain of a chip corresponding to a high-level signal received by the device. RE This refers to the total number of REs used for transmitting signals or allocated to the downlink transmission frequency domain resources of the device.

[0139] 2.11 Target notification messages, such as emergency message notifications, are used to broadcast emergency alarms, including natural disasters such as fires, snowstorms, earthquakes and tsunamis, or changes in the working environment within the community such as air pressure, pressure values, temperature, movement speed, and location changes.

[0140] In some embodiments, as shown in FIG2 and FIG10, the method provided by the present disclosure further includes S1001 and S1002.

[0141] In S1001, a second message is received from the second node.

[0142] Here, the second message is used to indicate the required configuration parameters.

[0143] The device can report a second message, which is used to indicate the configuration parameters required by the device. In this way, when the first node sends the first public message or the second public message, it can determine the parameter types in the first configuration information or the second configuration information according to the configuration parameters required by the device.

[0144] In S1002, a modified first public message or a modified second public message is sent based on the second message.

[0145] Here, the modified first public message or the modified second public message includes the required configuration parameters.

[0146] The first node can modify the parameter types in the first or second configuration information based on the configuration parameters required by the second node. In this way, when the first node sends a first or second common message to the second node, it can send the modified first or second common message, thereby transmitting the device's required configuration parameters to the second node.

[0147] The following will describe the transmission methods of the first public message and the second public message.

[0148] In some embodiments, the first public message is transmitted on a dedicated public channel, and the second public message is transmitted on the PRDCH.

[0149] Here, the dedicated public channel includes at least one of the following: physical layer (MAC) broadcast channel, transmission frequency domain resources corresponding to physical layer synchronization signals, and minimum frequency allocation resources of the physical layer based on frequency division multiplexing.

[0150] The PRDCH includes at least one of the following: downlink preamble, downlink tail sync, downlink control information, downlink data information, and downlink CRC; the PRDCH is mapped to the media access control (MAC) layer or physical layer (MAC) data channel, or the PRDCH is mapped to the paging channel. The device periodically performs blind detection and receives the PRDCH carrying the second common message according to the transmission configuration information of the second common message.

[0151] In one possible implementation, the time interval between the transmission timing of the first public message and the nearest synchronization signal in the time domain is a first preset time length, and the first preset time length corresponds to different parameters in the first configuration information.

[0152] For example, when the first public message carries cell selection parameters, the time interval / transmission period between the transmission timing of the first public message and the most recently detected synchronization signal (i.e., the synchronization signal most recent in the time domain to the transmission timing of the first public message) is T1 (i.e., the aforementioned first preset time length). When the first public message carries at least one of cell access and power control parameters, the time interval / transmission period between the transmission timing of the first public message and the most recently detected synchronization signal is T2. When the first public message carries at least one of cell reselection and cell handover parameters, the time interval / transmission period between the transmission timing of the first public message and the most recently detected synchronization signal is T3. When the first public message carries neighbor cell information, the time interval / transmission period between the transmission timing of the first public message and the most recently detected synchronization signal is T4. When the first public message carries at least one of downlink transmission frequency offset or uplink transmission frequency shift parameters, the time interval / transmission period between the transmission timing of the first public message and the most recently detected synchronization signal is T5. When the first public message carries emergency alarm information, the time interval / transmission period between the transmission timing of the first public message and the most recently detected synchronization signal is T6. T6 is not less than T5, T5 is not less than T4, T4 is not less than T3, T3 is not less than T2, and T2 is not less than T1. Here, when one or more of the above types are carried in the first common message, they are arranged in descending order of priority according to the transmission period of each parameter type from smallest to largest.

[0153] In another possible implementation, the control portion of the first public message indicates the type of information carried by the first public message. Here, the information type includes at least one of the following: system information (SI) (e.g., cell identifier), paging message (e.g., wake-up message), information indicating cell access or random access (e.g., cell selection parameters), and device-specific data information.

[0154] In some embodiments, the first public message and the second public message have different formats; the first public message is transmitted according to a first format, and the second public message is transmitted according to a second format. The M value of the first public message and / or the second public message includes a predefined value or is selected from a specific set.

[0155] The first format includes at least one of the following: a synchronization sequence, a start indication portion of the first common message, a clock calibration portion of the first common message, control information of the first common message, data information of the first common message, CRC information of the first common message, and an end character portion of the first common message; the data information of the first common message includes first configuration information.

[0156] Here, the start indication portion of the first public message includes a first start indication portion, the sequence of which is different from that of the start indication portion of the data transmitted on the PRDCH, and / or the first start indication portion is different from the transmission M value corresponding to the PRDCH.

[0157] If the synchronization signal associated with the first common message (i.e., the synchronization signal closest to the first common message in the time domain) and the first preset time length are used to determine the transmission start position of the first common message, then the first common message does not include the SIP of the first common message and the clock acquisition part (CAP) of the first common message. And / or, the start indication part and the clock acquisition part of the first common message are used to determine the scheduling information of the first common message;

[0158] Here, the first preset time length is the time length corresponding to the first configuration information; the scheduling information of the first public message includes at least one of the following: the TBS of the first public message, transmission bandwidth, transmission time length, encoding method, modulation method, M value, subcarrier spacing, chip length, coding rate, and cell identifier.

[0159] In one possible implementation, the start indication portion of the first common message is used to determine the transmission start position of the first common message, the cell identifier of the first common message, or the change indication of the first common message. The chip length or M value of the subsequent transmission portion of the first common message, or the change indication of the first common message, can be determined based on the clock calibration portion of the first common message.

[0160] Here, when the SIP of the first public message is used to determine the change indication of the first public message, the SIP of the first public message used to indicate a change in the first public message and the SIP or CAP of the first public message used to indicate that the first public message has not changed correspond to different sequences, transmission durations, or chip lengths. The CAP of the first public message uses different M values ​​to indicate whether the first public message has been changed or not.

[0161] In another possible implementation, the control information and data information of the first common message satisfy at least one of the following: the same encoding method, the same modulation method, the same coding rate, and the same M value. The control portion of the first common message is used to indicate the scheduling information of the data portion of the first common message and / or the information type carried by the first common message.

[0162] In another possible implementation, the bit length of the CRC information is determined according to the information type of the first configuration information in the first public message.

[0163] In another possible implementation, the tail synchronization code portion of the first public message is related to the information carried by the synchronization signal; the information carried by the synchronization signal includes at least one of the following: frequency position and sequence index. For example, if the frequency position of the synchronization signal is located at the nth frequency position in the A-IoT downlink frequency band, then the nth tail synchronization code among the candidate unsynchronized codes is selected. For example, if the sequence index of the synchronization signal is n, then the nth tail synchronization code among the candidate tail synchronization codes is selected.

[0164] The second format includes at least one of the following: a synchronization sequence, a start indication portion of the second common message, a clock calibration portion of the second common message, control information of the second common message, data information of the second common message, CRC information of the second common message, and an end character portion of the second common message; the data information of the second common message includes second configuration information.

[0165] In one possible implementation, the timing of the transmission of the synchronization signal corresponding to the second common message or the first common message is used to determine the starting position of the clock calibration section of the second common message.

[0166] For example, as shown in FIG11, the device can determine the start position of the CAP of the second public message based on the transmission timing (i.e., the transmission end time) of the first public message and a predefined time interval, thereby enabling more accurate reception of the second public message.

[0167] In another possible implementation, the start indication portion of the second common message includes a second start indication portion, which has a different sequence and / or a different corresponding M value than the start indication portion of the data transmitted on the PRDCH. Here, if the transmission timings of the first and second common messages do not overlap, the sequences corresponding to the first and second start indication portions of the first common message are the same, or the second start indication portion is a part of the sequence corresponding to the first start indication portion. For example, the transmission duration of the first start indication portion is not less than the transmission duration of the second start indication portion.

[0168] In another possible implementation, the second common message control section is used to indicate at least one of the following: modulation scheme, encoding scheme and encoding rate, TBS, and information type carried by the data portion of the second common message. For example, the information type includes at least one of system information (SI), paging message, information indicating cell access or random access, and device-specific data information.

[0169] In another possible implementation, when the first common message and the second common message are transmitted at the same frequency location, the transmission sequence or transmission duration of the start indication portion of the first common message and the start indication portion of the second common message are different; or, when the first common message and the second common message are transmitted at the same frequency location, the transmission sequence or transmission duration of the end symbol portion of the first common message and the end symbol portion of the second common message are different; or, when the first common message and the second common message are transmitted at the same frequency location, the transmission duration of the first common message and the transmission duration of the second common message are different.

[0170] For example, as shown in Figure 12, the transmission duration of the first public message (i.e., the total transmission duration of the message) is different from that of the second public message.

[0171] In another possible implementation, the start indication portion of the second public message is used to determine the transmission start position of the second public message, or the cell identifier of the second public message, or the change indication of the second public message; or, the clock calibration portion of the second public message is used to determine the chip length or M value of the information after the clock calibration portion of the second public message, or the change indication of the second public message.

[0172] The device can determine the start position or message identifier of the second common message, or the change indication of the first common message, or the change indication of the second common message, based on the start indication portion of the second common message. Alternatively, it can determine the chip length or M value of the subsequent transmission portion of the clock calibration portion of the second common message, or the change indication of the first common message, or the change indication of the second common message, based on the clock calibration portion of the second common message. The SIP of the second common message used to indicate a change in the first / second common message and the SIP / CAP of the second common message used to indicate no change in the first / second common message correspond to different sequences, transmission durations, or chip lengths. The CAP of the second common message uses different M values ​​to indicate whether the second common message has been changed.

[0173] For example, as shown in Figure 13, the starting position of the second public message can be determined based on the preamble of the second public message, thereby enabling better reception of the second public message.

[0174] The message transmission method provided in this disclosure can be applied to the second node 102 in the communication system shown in FIG1. ​​FIG14 shows a schematic flowchart of another message transmission method, which includes the following S1401.

[0175] In S1401, the first message sent from the first node is received.

[0176] Here, the first message includes a first public message and / or a second public message; wherein, the first public message corresponds to all types of devices; the second public message corresponds to the target device, which is a device of the target type or a device in the target device group.

[0177] The first common message corresponds to all types of devices, meaning it applies to all devices, while the second common message corresponds to a specific target device, meaning it only applies to a specific device. The target device can be a device of the target type or all devices within the target device. The first message can transmit both the first common message corresponding to all types of devices and the second common message corresponding to the target device. In this way, different types of common messages can be carried within the first message, thereby saving transmission resources.

[0178] It should be noted that the descriptions of the first public message and the second public message can be found in the description of the first node side, and will not be repeated here in the embodiments of this disclosure.

[0179] It is understood that, in order to achieve the above-mentioned functions, the message transmission device includes hardware structures and / or software modules corresponding to the execution of each function. Those skilled in the art should readily recognize that, based on the algorithmic steps of the examples described in conjunction with the embodiments of this disclosure, this disclosure can be implemented in hardware or a combination of hardware and computer software. Whether a function is executed in hardware or by computer software driving hardware depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this disclosure.

[0180] This disclosure embodiment can divide the message transmission device into functional modules according to the above method embodiment. For example, each function can be divided into a separate functional module, or two or more functions can be integrated into one functional module. The integrated module can be implemented in hardware or software. It should be noted that the module division in this disclosure embodiment is illustrative and only represents one logical functional division. In actual implementation, there may be other division methods. The following description uses the example of dividing each functional module according to each function.

[0181] Figure 15 is a schematic diagram of a communication device provided in an embodiment of this disclosure. The communication device can execute the message transmission method provided in the above-described method embodiment. As shown in Figure 15, the communication device includes: a sending unit 1501;

[0182] The sending unit 1501 is used to send a first message to the second node; the first message includes a first public message and / or a second public message; wherein, the first public message corresponds to all types of devices; the second public message corresponds to a target device, and the target device is a device of a target type or a device in a target device group.

[0183] In one possible implementation, the first public message includes first configuration information, which includes at least one of the following:

[0184] Cell identifier, synchronization signal transmission configuration, first public message transmission configuration, first public message change indication, cell selection parameters, cell reselection parameters, information type of the second public message, time domain resource configuration of the second public message, second public message change indication, target notification message, access configuration parameters.

[0185] In one possible implementation, the transmission configuration of the first public message includes at least one of the following:

[0186] The time interval between the first common message and the synchronization signal, the transmission period of the first common message, the transmission duration of the first common message, the transmission bandwidth of the first common message, the transmission frequency position of the first common message, the frequency offset of the first common message, the modulation method of the first common message, the M value of the first common message, and the transmission chip length of the first common message.

[0187] In one possible implementation, the change indication of the first public message is used to indicate at least one of the following:

[0188] The transmission configuration of the first public message, the change period of the first public message, the transmission timing within the change period of the first public message, the frequency domain transmission resources of the first public message after the change, and the first configuration information of the first public message within the first period or the first transmission timing are changed.

[0189] And / or, the change indication of the second public message is used to indicate at least one of the following:

[0190] The transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, and the second configuration information of the second public message within the second period or the second transmission timing are changed.

[0191] In one possible implementation, the information type of the second public message is used to indicate at least one of the following:

[0192] Does the transmission period of the second public message or the transmission opportunity of the physical device to the reader channel PDRCH exist within the transmission period of the first public message?

[0193] Does the transmission timing of the second public message or the PDRCH transmission timing occur after the end position of the first public message transmission?

[0194] The second public message carries the target device group information;

[0195] The type of information carried by the second public message.

[0196] In one possible implementation, the transmission mode of the first common message includes time division multiplexing and frequency division multiplexing; or, the transmission mode of the first common message includes frequency division multiplexing; or, in the case of multiple device types coexisting, the first common message adopts the frequency division multiplexing transmission mode, and the synchronization signal associated with the first common message adopts the time division multiplexing and frequency division multiplexing transmission modes.

[0197] In one possible implementation, the second public message includes second configuration information, which includes at least one of the following:

[0198] The target device type, the target device group identifier, the transmission bandwidth configuration, the wake-up information, the response event type corresponding to the wake-up information, the change indication of the first public message, the transmission configuration of the second public message, the change indication of the second public message, the allocated time domain resource configuration, the power control parameters, and the target notification message.

[0199] In one possible implementation, multiple devices in the same device group satisfy at least one of the following:

[0200] The downlink transmissions have the same transmission mode, the same transmission resources for the same second common message, the same modulation scheme, the same frequency offset, the same bit state or bit value of the target location corresponding to the target device group identifier in the second common message, and the same intermediate node. The uplink transmissions have different transmission modes and different transmission resources.

[0201] In one possible implementation, the transmission bandwidth configuration is used to indicate the transmission frequency location and transmission bandwidth of the target device.

[0202] In one possible implementation, the wake-up information is used to wake up the target device to execute a response event type; the response event type includes at least one of the following:

[0203] The operation includes: wake-up information response, initiating random access procedure, sending the first random access message, receiving the second random access message, entering cell reselection mode, entering cell handover decision mode, entering cell handover mode, entering inventory mode, entering read / write mode, entering authentication mode, entering backscatter transmission mode, entering positioning mode, initiating backscatter-based positioning signal transmission, and feedback device identification.

[0204] In one possible implementation, when the response event type is used to indicate the initiation of the backscatter-based positioning signal transmission operation, the second public message includes transmission frequency offset information or phase offset information of the backscatter-based positioning signal.

[0205] Alternatively, if the response event type is used to indicate at least one of the following: the operation of initiating the random access procedure, the operation of entering the inventory mode, the operation of entering the read-write mode, the operation of entering the authentication mode, the operation of sending the first random access message, and the operation of receiving the second random access message, the second common message includes a resource allocation indication for downlink transmission.

[0206] Alternatively, if the response event type is used to indicate the operation of initiating the random access procedure, the second public message includes access configuration parameters;

[0207] Alternatively, if the response event type is used to indicate the operation of sending the first random access message and the operation of the feedback device identification, the second common message includes an uplink transmission resource allocation indication;

[0208] Alternatively, if the response event type is used to indicate at least one of the cell reselection mode, the cell handover decision mode, and the cell handover mode, the second public message includes cell reselection parameters.

[0209] The resource allocation indication includes at least one of the following: Transport Block (TBS) indication, TBS indication field bit width, first TBS indication, second TBS indication, encoding method, encoding code rate, and modulation method; the first TBS indication is used to indicate that the device blindly detects a PRDCH carrying at least one target TBS.

[0210] In one possible implementation, the change indication of the first public message is used to indicate at least one of the following:

[0211] The transmission configuration of the first public message, the change period of the first public message, the transmission timing within the change period of the first public message, the frequency transmission resources of the first public message after the change, and the first configuration information of the first public message within the first period or the first transmission timing are changed.

[0212] And / or, the change indication of the second public message is used to indicate at least one of the following:

[0213] The transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, and the second configuration information of the second public message within the second period or the second transmission timing are changed.

[0214] In one possible implementation, the transmission configuration of the second public message includes at least one of the following:

[0215] The time interval between the second public message and the most recent synchronization signal in the time domain;

[0216] The time interval between the second public message and the first public message that is the most recent in the time domain;

[0217] The frequency interval between the first public message or synchronization signal that is closest to the second public message in the time domain;

[0218] The transmission period of the second public message;

[0219] Frequency offset of the second public message;

[0220] The modulation scheme of the second public message;

[0221] The M value of the second public message;

[0222] The chip length of the second public message.

[0223] In one possible implementation, the power control parameters are used to indicate any of the following:

[0224] The power ratio per unit resource between the preamble of the second public message and the target information;

[0225] The target information is control information or data information; the data information includes the second configuration information.

[0226] The power ratio per unit resource between the second common message and the nearest synchronization signal in the time domain or the first common message;

[0227] The transmission power range of the synchronization signal, the first common message, or the second common message.

[0228] In one possible implementation, the unit resource includes at least one of the following:

[0229] Time-domain resources within the signal transmission bandwidth, time length corresponding to the number of predefined orthogonal frequency division multiplexing (OFDM) symbols, time length corresponding to the number of predefined chips, and number of predefined resource particles.

[0230] Wherein, the time length corresponding to the number of predefined OFDM symbols and the number of predefined chips is not greater than the transmission duration of the second common message; the number of predefined particles is not greater than the total number of resource particles corresponding to at least one of the transmission frequency domain resources of the second common message, the first common message, and the synchronization signal.

[0231] In one possible implementation, the power ratio per unit resource is the average energy per resource particle, which is the ratio of the average transmit power of the high level of the signal on the time-domain resource to the frequency-domain resource.

[0232] In one possible implementation, the device further includes a receiving unit 1502; the receiving unit 1502 is configured to receive a second message sent from the second node, the second message indicating required configuration parameters;

[0233] The sending unit 1501 is further configured to send a modified first public message or a modified second public message based on the second message, wherein the modified first public message or the modified second public message includes the configuration parameters of the requirement.

[0234] In one possible implementation, the first public message is transmitted on a dedicated public channel, and the second public message is transmitted on a PRDCH; the dedicated public channel includes at least one of the following: a physical layer broadcast channel, transmission frequency domain resources corresponding to physical layer synchronization signals, and minimum frequency allocation resources of the physical layer based on frequency division multiplexing.

[0235] In one possible implementation, the time interval between the transmission timing of the first public message and the nearest synchronization signal in the time domain is a first preset time length, and the first preset time lengths are different for different parameters in the first configuration information.

[0236] In one possible implementation, the PRDCH includes at least one of the following: downlink preamble, downlink tail sync, downlink control information, downlink data information, and downlink cyclic redundancy check (CRC); the PRDCH is mapped to the Media Access Control (MAC) layer data channel, or the PRDCH is mapped to the paging channel.

[0237] In one possible implementation, the first public message is transmitted in a first format, and the second public message is transmitted in a second format.

[0238] In one possible implementation, the first format includes at least one of the following: a synchronization sequence, a start indication portion of the first common message, a clock calibration portion of the first common message, control information of the first common message, data information of the first common message, CRC information of the first common message, and an end marker portion of the first common message; the data information of the first common message includes first configuration information;

[0239] The second format includes at least one of the following: a synchronization sequence, a start indication portion of the second common message, a clock calibration portion of the second common message, control information of the second common message, data information of the second common message, CRC information of the second common message, and an end character portion of the second common message; the data information of the second common message includes second configuration information.

[0240] In one possible implementation, the start indication portion of the first public message includes a first start indication portion, the sequence of which differs from the start indication portion of the data transmitted on the PRDCH, and / or the first start indication portion differs from the transmission M value corresponding to the PRDCH.

[0241] In one possible implementation, the synchronization signal associated with the first public message and the first preset time length are used to determine the transmission start position of the first public message;

[0242] And / or, the start indication portion of the first common message and the clock calibration portion of the first common message are used to determine the scheduling information of the first common message;

[0243] Wherein, the first preset time length is the time length corresponding to the first configuration information; the scheduling information of the first public message includes at least one of the following:

[0244] The first public message includes TBS, transmission bandwidth, transmission time length, encoding method, modulation method, M value, subcarrier spacing, chip length, encoding code rate, and cell identifier.

[0245] In one possible implementation, the start indication portion of the first public message is used to determine the transmission start position of the first public message, the cell identifier of the first public message, or the change indication of the first public message.

[0246] Alternatively, the clock calibration portion of the first public message may be used to determine the chip length or M value of the information following the clock calibration portion in the first public message, or a change indication of the first public message.

[0247] In one possible implementation, the control information and data information of the first public message satisfy at least one of the following: the same encoding method, the same modulation method, the same encoding code rate, and the same M value.

[0248] In one possible implementation, the control information of the first public message is used to indicate the information type of the first public message, and / or the scheduling information of the data information carried by the first public message.

[0249] In one possible implementation, the bit length of the CRC information is determined based on the information type of the first configuration information in the first public message.

[0250] In one possible implementation, the tail synchronization code portion of the first public message is related to the information carried by the synchronization signal; the information carried by the synchronization signal includes at least one of the following: frequency position, sequence index.

[0251] In one possible implementation, the synchronization signal corresponding to the second common message or the transmission timing of the first common message is used to determine the starting position of the clock calibration portion of the second common message.

[0252] In one possible implementation, the start indication portion of the second public message includes a second start indication portion, which has a different sequence and / or a different corresponding M value from the start indication portion of the data transmitted on the PRDCH.

[0253] In one possible implementation, the control portion of the second public message is used to indicate at least one of the following: the modulation method, encoding method, encoding rate, TBS, and information type of the data information.

[0254] In one possible implementation, when the first public message and the second public message are transmitted at the same frequency, the transmission sequence or transmission duration of the start indication portion of the first public message and the start indication portion of the second public message are different.

[0255] Alternatively, when the first public message and the second public message are transmitted at the same frequency, the transmission sequence or transmission duration of the end-of-message portion of the first public message and the end-of-message portion of the second public message are different.

[0256] Alternatively, if the first public message and the second public message are transmitted at the same frequency, the transmission duration of the first public message and the transmission duration of the second public message are different.

[0257] In one possible implementation, the start indication portion of the second public message is used to determine the transmission start position of the second public message, the cell identifier of the second public message, or the change indication of the second public message;

[0258] Alternatively, the clock calibration portion of the second public message may be used to determine the chip length or M value of the information following the clock calibration portion in the second public message, or a change indication of the second public message.

[0259] Figure 16 is a schematic diagram of another communication device provided in an embodiment of this disclosure. The communication device can execute the message transmission method provided in the above method embodiments. As shown in Figure 16, the communication device includes: a receiving unit 1601;

[0260] The receiving unit 1601 is configured to receive a first message sent from a first node; the first message includes a first public message and / or a second public message; wherein the first public message corresponds to all types of devices; the second public message corresponds to a target device, and the target device is a device of a target type or a device in a target device group.

[0261] In one possible implementation, the first public message includes first configuration information, which includes at least one of the following:

[0262] Cell identifier, synchronization signal transmission configuration, first public message transmission configuration, first public message change indication, cell selection parameters, cell reselection parameters, information type of the second public message, time domain resource configuration of the second public message, second public message change indication, target notification message, access configuration parameters.

[0263] In one possible implementation, the transmission configuration of the first public message includes at least one of the following:

[0264] The time interval between the first common message and the synchronization signal, the transmission period of the first common message, the transmission duration of the first common message, the transmission bandwidth of the first common message, the transmission frequency position of the first common message, the frequency offset of the first common message, the modulation method of the first common message, the M value of the first common message, and the transmission chip length of the first common message.

[0265] In one possible implementation, the change indication of the first public message is used to indicate at least one of the following:

[0266] The transmission configuration of the first public message, the change period of the first public message, the transmission timing within the change period of the first public message, the frequency domain transmission resources of the first public message after the change, and the first configuration information of the first public message within the first period or the first transmission timing are changed.

[0267] And / or, the change indication of the second public message is used to indicate at least one of the following:

[0268] The transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, and the second configuration information of the second public message within the second period or the second transmission timing are changed.

[0269] In one possible implementation, the information type of the second public message is used to indicate at least one of the following:

[0270] Does the transmission period of the second public message or the transmission opportunity of the physical device to the reader channel PDRCH exist within the transmission period of the first public message?

[0271] Does the transmission timing of the second public message or the PDRCH transmission timing occur after the end position of the first public message transmission?

[0272] The second public message carries the target device group information;

[0273] The type of information carried by the second public message.

[0274] In one possible implementation, the transmission mode of the first common message includes time division multiplexing and frequency division multiplexing; or, the transmission mode of the first common message includes frequency division multiplexing; or, in the case of multiple device types coexisting, the first common message adopts the frequency division multiplexing transmission mode, and the synchronization signal associated with the first common message adopts the time division multiplexing and frequency division multiplexing transmission modes.

[0275] In one possible implementation, the second public message includes second configuration information, which includes at least one of the following:

[0276] The target device type, the target device group identifier, the transmission bandwidth configuration, the wake-up information, the response event type corresponding to the wake-up information, the change indication of the first public message, the transmission configuration of the second public message, the change indication of the second public message, the allocated time domain resource configuration, the power control parameters, and the target notification message.

[0277] In one possible implementation, multiple devices in the same device group satisfy at least one of the following:

[0278] The downlink transmissions have the same transmission mode, the same transmission resources for the same second common message, the same modulation scheme, the same frequency offset, the same bit state or bit value of the target location corresponding to the target device group identifier in the second common message, and the same intermediate node. The uplink transmissions have different transmission modes and different transmission resources.

[0279] In one possible implementation, the transmission bandwidth configuration is used to indicate the transmission frequency location and transmission bandwidth of the target device.

[0280] In one possible implementation, the wake-up information is used to wake up the target device to execute a response event type; the response event type includes at least one of the following:

[0281] The operation includes: wake-up information response, initiating random access procedure, sending the first random access message, receiving the second random access message, entering cell reselection mode, entering cell handover decision mode, entering cell handover mode, entering inventory mode, entering read / write mode, entering authentication mode, entering backscatter transmission mode, entering positioning mode, initiating backscatter-based positioning signal transmission, and feedback device identification.

[0282] In one possible implementation, when the response event type is used to indicate the initiation of the backscatter-based positioning signal transmission operation, the second public message includes transmission frequency offset information or phase offset information of the backscatter-based positioning signal.

[0283] Alternatively, if the response event type is used to indicate at least one of the following: the operation of initiating the random access procedure, the operation of entering the inventory mode, the operation of entering the read-write mode, the operation of entering the authentication mode, the operation of sending the first random access message, and the operation of receiving the second random access message, the second common message includes a resource allocation indication for downlink transmission.

[0284] Alternatively, if the response event type is used to indicate the operation of initiating the random access procedure, the second public message includes access configuration parameters;

[0285] Alternatively, if the response event type is used to indicate the operation of sending the first random access message and the operation of the feedback device identification, the second common message includes an uplink transmission resource allocation indication;

[0286] Alternatively, if the response event type is used to indicate at least one of the cell reselection mode, the cell handover decision mode, and the cell handover mode, the second public message includes cell reselection parameters.

[0287] The resource allocation indication includes at least one of the following: Transport Block (TBS) indication, TBS indication field bit width, first TBS indication, second TBS indication, encoding method, encoding code rate, and modulation method; the first TBS indication is used to indicate that the device blindly detects a PRDCH carrying at least one target TBS.

[0288] In one possible implementation, the change indication of the first public message is used to indicate at least one of the following:

[0289] The transmission configuration of the first public message, the change period of the first public message, the transmission timing within the change period of the first public message, the frequency transmission resources of the first public message after the change, and the first configuration information of the first public message within the first period or the first transmission timing are changed.

[0290] And / or, the change indication of the second public message is used to indicate at least one of the following:

[0291] The transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, and the second configuration information of the second public message within the second period or the second transmission timing are changed.

[0292] In one possible implementation, the transmission configuration of the second public message includes at least one of the following:

[0293] The time interval between the second public message and the most recent synchronization signal in the time domain;

[0294] The time interval between the second public message and the first public message that is the most recent in the time domain;

[0295] The frequency interval between the first public message or synchronization signal that is closest to the second public message in the time domain;

[0296] The transmission period of the second public message;

[0297] Frequency offset of the second public message;

[0298] The modulation scheme of the second public message;

[0299] The M value of the second public message;

[0300] The chip length of the second public message.

[0301] In one possible implementation, the power control parameters are used to indicate any of the following:

[0302] The power ratio per unit resource between the preamble of the second public message and the target information;

[0303] The target information is control information or data information; the data information includes the second configuration information.

[0304] The power ratio per unit resource between the second common message and the nearest synchronization signal in the time domain or the first common message;

[0305] The transmission power range of the synchronization signal, the first common message, or the second common message.

[0306] In one possible implementation, the unit resource includes at least one of the following:

[0307] Time-domain resources within the signal transmission bandwidth, time length corresponding to the number of predefined orthogonal frequency division multiplexing (OFDM) symbols, time length corresponding to the number of predefined chips, and number of predefined resource particles.

[0308] Wherein, the time length corresponding to the number of predefined OFDM symbols and the number of predefined chips is not greater than the transmission duration of the second common message; the number of predefined particles is not greater than the total number of resource particles corresponding to at least one of the transmission frequency domain resources of the second common message, the first common message, and the synchronization signal.

[0309] In one possible implementation, the power ratio per unit resource is the average energy per resource particle, which is the ratio of the average transmit power of the high level of the signal on the time-domain resource to the frequency-domain resource.

[0310] In one possible implementation, the device further includes a sending unit 1602; a receiving unit 1601 is configured to receive a second message sent from the second node, the second message indicating required configuration parameters;

[0311] The sending unit 1602 is further configured to send a modified first public message or a modified second public message based on the second message, wherein the modified first public message or the modified second public message includes the configuration parameters of the requirement.

[0312] In one possible implementation, the first public message is transmitted on a dedicated public channel, and the second public message is transmitted on a PRDCH; the dedicated public channel includes at least one of the following: a physical layer broadcast channel, transmission frequency domain resources corresponding to physical layer synchronization signals, and minimum frequency allocation resources of the physical layer based on frequency division multiplexing.

[0313] In one possible implementation, the time interval between the transmission timing of the first public message and the nearest synchronization signal in the time domain is a first preset time length, and the first preset time lengths are different for different parameters in the first configuration information.

[0314] In one possible implementation, the PRDCH includes at least one of the following: downlink preamble, downlink tail sync, downlink control information, downlink data information, and downlink cyclic redundancy check (CRC); the PRDCH is mapped to the Media Access Control (MAC) layer data channel, or the PRDCH is mapped to the paging channel.

[0315] In one possible implementation, the first public message is transmitted in a first format, and the second public message is transmitted in a second format.

[0316] In one possible implementation, the first format includes at least one of the following: a synchronization sequence, a start indication portion of the first common message, a clock calibration portion of the first common message, control information of the first common message, data information of the first common message, CRC information of the first common message, and an end marker portion of the first common message; the data information of the first common message includes first configuration information;

[0317] The second format includes at least one of the following: a synchronization sequence, a start indication portion of the second common message, a clock calibration portion of the second common message, control information of the second common message, data information of the second common message, CRC information of the second common message, and an end character portion of the second common message; the data information of the second common message includes second configuration information.

[0318] In one possible implementation, the start indication portion of the first public message includes a first start indication portion, the sequence of which differs from the start indication portion of the data transmitted on the PRDCH, and / or the first start indication portion differs from the transmission M value corresponding to the PRDCH.

[0319] In one possible implementation, the synchronization signal associated with the first public message and the first preset time length are used to determine the transmission start position of the first public message;

[0320] And / or, the start indication portion of the first common message and the clock calibration portion of the first common message are used to determine the scheduling information of the first common message;

[0321] Wherein, the first preset time length is the time length corresponding to the first configuration information; the scheduling information of the first public message includes at least one of the following:

[0322] The first public message includes TBS, transmission bandwidth, transmission time length, encoding method, modulation method, M value, subcarrier spacing, chip length, encoding code rate, and cell identifier.

[0323] In one possible implementation, the start indication portion of the first public message is used to determine the transmission start position of the first public message, the cell identifier of the first public message, or the change indication of the first public message.

[0324] Alternatively, the clock calibration portion of the first public message may be used to determine the chip length or M value of the information following the clock calibration portion in the first public message, or a change indication of the first public message.

[0325] In one possible implementation, the control information and data information of the first public message satisfy at least one of the following: the same encoding method, the same modulation method, the same encoding code rate, and the same M value.

[0326] In one possible implementation, the control information of the first public message is used to indicate the information type of the first public message, and / or the scheduling information of the data information carried by the first public message.

[0327] In one possible implementation, the bit length of the CRC information is determined based on the information type of the first configuration information in the first public message.

[0328] In one possible implementation, the tail synchronization code portion of the first public message is related to the information carried by the synchronization signal; the information carried by the synchronization signal includes at least one of the following: frequency position, sequence index.

[0329] In one possible implementation, the synchronization signal corresponding to the second common message or the transmission timing of the first common message is used to determine the starting position of the clock calibration portion of the second common message.

[0330] In one possible implementation, the start indication portion of the second public message includes a second start indication portion, which has a different sequence and / or a different corresponding M value from the start indication portion of the data transmitted on the PRDCH.

[0331] In one possible implementation, the control portion of the second public message is used to indicate at least one of the following: the modulation method, encoding method, encoding rate, TBS, and information type of the data information.

[0332] In one possible implementation, when the first public message and the second public message are transmitted at the same frequency, the transmission sequence or transmission duration of the start indication portion of the first public message and the start indication portion of the second public message are different.

[0333] Alternatively, when the first public message and the second public message are transmitted at the same frequency, the transmission sequence or transmission duration of the end-of-message portion of the first public message and the end-of-message portion of the second public message are different.

[0334] Alternatively, if the first public message and the second public message are transmitted at the same frequency, the transmission duration of the first public message and the transmission duration of the second public message are different.

[0335] In one possible implementation, the start indication portion of the second public message is used to determine the transmission start position of the second public message, the cell identifier of the second public message, or the change indication of the second public message;

[0336] Alternatively, the clock calibration portion of the second public message may be used to determine the chip length or M value of the information following the clock calibration portion in the second public message, or a change indication of the second public message.

[0337] In the case of implementing the functions of the integrated modules described above in hardware, this disclosure provides another possible structure for the communication device involved in the above embodiments. As shown in FIG17, the communication device 170 includes: a processor 1702 and a bus 1704. Optionally, the communication device may further include a memory 1701; optionally, the communication device may further include a communication interface 1703.

[0338] Processor 1702 may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1702 may be a central processing unit, a general-purpose processor, a digital signal processor, an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, transistor logic devices, hardware components, or any combination thereof. It may implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with embodiments of this disclosure. Processor 1702 may also be a combination of computing functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0339] The communication interface 1703 is used to connect to other devices via a communication network. This communication network can be Ethernet, wireless access network, wireless local area network (WLAN), etc.

[0340] The memory 1701 may be a read-only memory (ROM) or other type of static storage device capable of storing static information and instructions, random access memory (RAM) or other type of dynamic storage device capable of storing information and instructions, or electrically erasable programmable read-only memory (EEPROM), disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but is not limited thereto.

[0341] As one possible implementation, the memory 1701 can exist independently of the processor 1702. The memory 1701 can be connected to the processor 1702 via a bus 1704 and is used to store instructions or program code. When the processor 1702 calls and executes the instructions or program code stored in the memory 1701, it can implement the message transmission method provided in the embodiments of this disclosure.

[0342] In another possible implementation, the memory 1701 can also be integrated with the processor 1702.

[0343] Bus 1704 can be an extended industry standard architecture (EISA) bus, etc. Bus 1704 can be divided into address bus, data bus, control bus, etc. For ease of illustration, only one thick line is used to represent it in Figure 17, but this does not mean that there is only one bus or one type of bus.

[0344] Some embodiments of this disclosure provide a computer-readable storage medium (e.g., a non-transitory computer-readable storage medium) storing computer program instructions that, when executed on a computer, cause the computer to perform the message transmission method as described in any of the above embodiments.

[0345] Exemplary examples show that the aforementioned computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard disks, floppy disks, or magnetic tapes), optical discs (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., erasable programmable read-only memory (EPROMs), cards, sticks, or key drives, etc.). The various computer-readable storage media described in this disclosure may represent one or more devices for storing information and / or other machine-readable storage media. The term "machine-readable storage media" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and / or carrying instructions and / or data.

[0346] This disclosure provides a computer program product containing instructions that, when run on a computer, cause the computer to execute the message transmission method described in any of the above embodiments. The above descriptions are merely specific implementations of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions within the technical scope disclosed in this disclosure should be covered within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A message transmission method, wherein, Applied to the first node, the method includes: Send a first message to the second node; the first message includes a first public message and / or a second public message; wherein the first public message corresponds to all types of devices; the second public message corresponds to a target device, the target device being a device of the target type or a device in a target device group.

2. The method according to claim 1, wherein, The first public message includes first configuration information, which includes at least one of the following: Cell identifier, synchronization signal transmission configuration, first public message transmission configuration, first public message change indication, cell selection parameters, cell reselection parameters, information type of the second public message, time domain resource configuration of the second public message, second public message change indication, target notification message, access configuration parameters.

3. The method according to claim 2, wherein, The transmission configuration of the first public message includes at least one of the following: The time interval between the first common message and the synchronization signal, the transmission period of the first common message, the transmission duration of the first common message, the transmission bandwidth of the first common message, the transmission frequency position of the first common message, the frequency offset of the first common message, the modulation method of the first common message, the M value of the first common message, and the transmission chip length of the first common message.

4. The method according to claim 2, wherein, The change indication in the first public message is used to indicate at least one of the following: The transmission configuration of the first public message, the change period of the first public message, the transmission timing within the change period of the first public message, the frequency domain transmission resources of the first public message after the change, and the first configuration information of the first public message within the first period or the first transmission timing are changed. And / or, the change indication of the second public message is used to indicate at least one of the following: The transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, and the second configuration information of the second public message within the second period or the second transmission timing are changed.

5. The method according to claim 2, wherein, The information type of the second public message is used to indicate at least one of the following: Does the transmission period of the second public message or the transmission opportunity of the physical device to the reader channel PDRCH exist within the transmission period of the first public message? Does the transmission timing of the second public message or the PDRCH transmission timing occur after the end position of the first public message transmission? The second public message carries the target device group information; The type of information carried by the second public message.

6. The method according to claim 2, wherein, The transmission mode of the first common message includes time division multiplexing and frequency division multiplexing; or, the transmission mode of the first common message includes frequency division multiplexing; or, in the case of multiple device types coexisting, the first common message adopts the frequency division multiplexing transmission mode, and the synchronization signal associated with the first common message adopts the time division multiplexing and frequency division multiplexing transmission modes.

7. The method according to claim 1, wherein, The second public message includes second configuration information, which includes at least one of the following: The target device type, the target device group identifier, the transmission bandwidth configuration, the wake-up information, the response event type corresponding to the wake-up information, the change indication of the first public message, the transmission configuration of the second public message, the change indication of the second public message, the allocated time domain resource configuration, the power control parameters, and the target notification message.

8. The method according to claim 7, wherein, Multiple devices in the same equipment group meet at least one of the following criteria: The downlink transmissions have the same transmission mode, the same transmission resources for the same second common message, the same modulation scheme, the same frequency offset, the same bit state or bit value of the target location corresponding to the target device group identifier in the second common message, and the same intermediate node. The uplink transmissions have different transmission modes and different transmission resources.

9. The method according to claim 7, wherein, The transmission bandwidth configuration is used to indicate the transmission frequency location and transmission bandwidth of the target device.

10. The method according to claim 7, wherein, The wake-up information is used to wake up the target device to execute a response event type; the response event type includes at least one of the following: The operation includes: wake-up information response, initiating random access procedure, sending the first random access message, receiving the second random access message, entering cell reselection mode, entering cell handover decision mode, entering cell handover mode, entering inventory mode, entering read / write mode, entering authentication mode, entering backscatter transmission mode, entering positioning mode, initiating backscatter-based positioning signal transmission, and feedback device identification.

11. The method according to claim 10, wherein, When the response event type is used to indicate the initiation of the backscatter-based positioning signal transmission operation, the second common message includes transmission frequency offset information or phase offset information of the backscatter-based positioning signal. Alternatively, if the response event type is used to indicate at least one of the following: the operation of initiating the random access procedure, the operation of entering the inventory mode, the operation of entering the read-write mode, the operation of entering the authentication mode, the operation of sending the first random access message, and the operation of receiving the second random access message, the second common message includes a resource allocation indication for downlink transmission. Alternatively, if the response event type is used to indicate the operation of initiating the random access procedure, the second public message includes access configuration parameters; Alternatively, if the response event type is used to indicate the operation of sending the first random access message and the operation of the feedback device identification, the second common message includes an uplink transmission resource allocation indication; Alternatively, if the response event type is used to indicate at least one of the cell reselection mode, the cell handover decision mode, and the cell handover mode, the second public message includes cell reselection parameters. The resource allocation indication includes at least one of the following: Transport Block (TBS) indication, TBS indication field bit width, first TBS indication, second TBS indication, encoding method, encoding code rate, and modulation method; the first TBS indication is used to indicate that the device blindly detects a PRDCH carrying at least one target TBS.

12. The method according to claim 7, wherein, The change indication in the first public message is used to indicate at least one of the following: The transmission configuration of the first public message, the change period of the first public message, the transmission timing within the change period of the first public message, the frequency transmission resources of the first public message after the change, and the first configuration information of the first public message within the first period or the first transmission timing are changed. And / or, the change indication of the second public message is used to indicate at least one of the following: The transmission configuration of the second public message, the change period of the second public message, the transmission timing within the change period of the second public message, the frequency transmission resources of the second public message after the change, and the second configuration information of the second public message within the second period or the second transmission timing are changed.

13. The method according to claim 7, wherein, The transmission configuration of the second public message includes at least one of the following: The time interval between the second public message and the most recent synchronization signal in the time domain; The time interval between the second public message and the first public message that is the most recent in the time domain; The frequency interval between the first public message or synchronization signal that is closest to the second public message in the time domain; The transmission period of the second public message; Frequency offset of the second public message; The modulation scheme of the second public message; The M value of the second public message; The chip length of the second public message.

14. The method according to claim 7, wherein, The power control parameters are used to indicate any of the following: The power ratio per unit resource between the preamble of the second public message and the target information; The target information is control information or data information; the data information includes the second configuration information. The power ratio per unit resource between the second common message and the nearest synchronization signal in the time domain or the first common message; The transmission power range of the synchronization signal, the first common message, or the second common message.

15. The method according to claim 14, wherein, The unit resource includes at least one of the following: Time-domain resources within the signal transmission bandwidth, time length corresponding to the number of predefined orthogonal frequency division multiplexing (OFDM) symbols, time length corresponding to the number of predefined chips, and number of predefined resource particles. Wherein, the time length corresponding to the number of predefined OFDM symbols and the number of predefined chips is not greater than the transmission duration of the second common message; the number of predefined particles is not greater than the total number of resource particles corresponding to at least one of the transmission frequency domain resources of the second common message, the first common message, and the synchronization signal.

16. The method of claim 14, wherein, The power ratio per unit resource is the average energy per resource particle, which is the ratio of the average transmit power of the high level of the signal in the time domain resource to the power of the frequency domain resource.

17. The method according to claim 1, wherein, The method further includes: Receive a second message sent from the second node, the second message being used to indicate the required configuration parameters; Based on the second message, a modified first public message or a modified second public message is sent, wherein the modified first public message or the modified second public message includes the configuration parameters of the requirement.

18. The method according to claim 1, wherein, The first public message is transmitted on a dedicated public channel, and the second public message is transmitted on a PRDCH; the dedicated public channel includes at least one of the following: a physical layer broadcast channel, transmission frequency domain resources corresponding to physical layer synchronization signals, and minimum frequency allocation resources of the physical layer based on frequency division multiplexing.

19. The method according to claim 2, wherein, The time interval between the transmission timing of the first public message and the nearest synchronization signal in the time domain is a first preset time length, and the first preset time lengths are different for different parameters in the first configuration information.

20. The method according to claim 18, wherein, The PRDCH includes at least one of the following: downlink preamble, downlink tail sync, downlink control information, downlink data information, and downlink cyclic redundancy check (CRC); the PRDCH is mapped to the Media Access Control (MAC) layer data channel, or the PRDCH is mapped to the paging channel.

21. The method according to claim 1, wherein, The first public message is transmitted in a first format, and the second public message is transmitted in a second format.

22. The method according to claim 21, wherein, The first format includes at least one of the following: a synchronization sequence, a start indication portion of the first common message, a clock calibration portion of the first common message, control information of the first common message, data information of the first common message, CRC information of the first common message, and an end character portion of the first common message; the data information of the first common message includes first configuration information; The second format includes at least one of the following: a synchronization sequence, a start indication portion of the second common message, a clock calibration portion of the second common message, control information of the second common message, data information of the second common message, CRC information of the second common message, and an end character portion of the second common message; the data information of the second common message includes second configuration information.

23. The method according to claim 22, wherein, The start indication portion of the first public message includes a first start indication portion, the sequence of which is different from that of the start indication portion of the data transmitted on the PRDCH, and / or the first start indication portion is different from the transmission M value corresponding to the PRDCH.

24. The method according to claim 22, wherein, The synchronization signal associated with the first public message and the first preset time length are used to determine the transmission start position of the first public message; And / or, the start indication portion of the first common message and the clock calibration portion of the first common message are used to determine the scheduling information of the first common message; Wherein, the first preset time length is the time length corresponding to the first configuration information; the scheduling information of the first public message includes at least one of the following: The first public message includes TBS, transmission bandwidth, transmission time length, encoding method, modulation method, M value, subcarrier spacing, chip length, encoding code rate, and cell identifier.

25. The method according to claim 22, wherein, The start indication portion of the first public message is used to determine the transmission start position of the first public message, the cell identifier of the first public message, or the change indication of the first public message; Alternatively, the clock calibration portion of the first public message may be used to determine the chip length or M value of the information following the clock calibration portion in the first public message, or a change indication of the first public message.

26. The method according to claim 22, wherein, The control information and data information of the first public message satisfy at least one of the following: the same encoding method, the same modulation method, the same encoding code rate, and the same M value.

27. The method according to claim 22, wherein, The control information of the first public message is used to indicate the information type of the first public message, and / or the scheduling information of the data information carried by the first public message.

28. The method according to claim 22, wherein, The bit length of the CRC information is determined according to the information type of the first configuration information in the first public message.

29. The method according to claim 22, wherein, The tail synchronization code portion of the first public message is related to the information carried by the synchronization signal; the information carried by the synchronization signal includes at least one of the following: frequency position, sequence index.

30. The method according to claim 22, wherein, The synchronization signal corresponding to the second common message or the transmission timing of the first common message is used to determine the starting position of the clock calibration section of the second common message.

31. The method according to claim 22, wherein, The start indication portion of the second public message includes a second start indication portion, which has a different sequence and / or a different M value than the start indication portion of the data transmitted on the PRDCH.

32. The method according to claim 22, wherein, The control portion of the second public message is used to indicate at least one of the following: the modulation method, encoding method, encoding rate, TBS, and information type of the data information.

33. The method according to claim 22, wherein, When the first public message and the second public message are transmitted at the same frequency, the transmission sequence or transmission duration of the start indication portion of the first public message and the start indication portion of the second public message are different. Alternatively, when the first public message and the second public message are transmitted at the same frequency, the transmission sequence or transmission duration of the end-of-message portion of the first public message and the end-of-message portion of the second public message are different. Alternatively, if the first public message and the second public message are transmitted at the same frequency, the transmission duration of the first public message and the transmission duration of the second public message are different.

34. The method according to claim 22, wherein, The start indication portion of the second public message is used to determine the transmission start position of the second public message, the cell identifier of the second public message, or the change indication of the second public message; Alternatively, the clock calibration portion of the second public message may be used to determine the chip length or M value of the information following the clock calibration portion in the second public message, or a change indication of the second public message.

35. A message transmission method, wherein, Applied to the second node, the method includes: Receive a first message sent from a first node; the first message includes a first public message and / or a second public message; wherein the first public message corresponds to all types of devices; the second public message corresponds to a target device, the target device being a device of a target type or a device in a target device group.

36. The method according to claim 35, wherein, The first public message includes first configuration information, which includes at least one of the following: Cell identifier, synchronization signal transmission configuration, first public message transmission configuration, first public message change indication, cell selection parameters, cell reselection parameters, information type of the second public message, time domain resource configuration of the second public message, second public message change indication, target notification message, access configuration parameters.

37. The method of claim 35, wherein, The second public message includes second configuration information, which includes at least one of the following: The target type, the target device group identifier, the transmission bandwidth configuration, the wake-up information, the response event type corresponding to the wake-up information, the change indication of the first public message, the transmission configuration of the second public message, the change indication of the second public message, the allocated time domain resource configuration, the power control parameters, and the target notification message.

38. The method according to claim 35, wherein, The first public message is transmitted in a first format, and the second public message is transmitted in a second format.

39. The method according to claim 38, wherein, The first format includes at least one of the following: a synchronization sequence, a start indication portion of the first common message, a clock calibration portion of the first common message, control information of the first common message, data information of the first common message, CRC information of the first common message, and an end character portion of the first common message; the data information of the first common message includes first configuration information; The second format includes at least one of the following: a synchronization sequence, a start indication portion of the second common message, a clock calibration portion of the second common message, control information of the second common message, data information of the second common message, CRC information of the second common message, and an end character portion of the second common message; the data information of the second common message includes second configuration information.

40. A communication device, wherein, include: Memory and processor; Memory and processor are coupled; The memory is used to store instructions that can be executed by the processor; When the processor executes the instructions, it performs the method as described in any one of claims 1-39.

41. A computer-readable storage medium, wherein, The computer-readable storage medium includes a non-transitory computer-readable storage medium on which computer instructions are stored, which, when executed on a computer, cause the computer to perform the method as described in any one of claims 1-39.

42. A computer program product, wherein, The computer program product includes computing technology program instructions that, when executed by a processor, implement the method as described in any one of claims 1-39.

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