Communication method, device and equipment of industrial wireless network, medium and program product

Abstract

The invention relates to a communication method and device of an industrial wireless network, equipment, a medium and a program product. The communication method of the industrial wireless network is applied to a management station in the industrial wireless network, and comprises the following steps: mapping downlink narrow-band data into first frequency domain data by adopting a first resource mapping mode, and mapping downlink broadband data into second frequency domain data by adopting a second resource mapping mode, a frequency domain resource scheduling unit corresponding to the first resource mapping mode is smaller than a frequency domain resource scheduling unit corresponding to the second resource mapping mode; obtaining a downlink time domain signal according to the first frequency domain data and the second frequency domain data; and broadcasting a downlink time domain signal to a narrowband terminal and a broadband terminal within the coverage range of the management station. By adopting the method, the communication flexibility of the industrial wireless network can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of industrial wireless networks, and particularly to a communication method, device, equipment, medium and program product for an industrial wireless network. Background Art

[0002] Industrial wireless technology has become a key enabling technology for industrial automation as it can help improve production efficiency, reduce costs, enhance security and intelligence. Wireless devices in the field of industrial wireless networks can generally be classified into management stations (MS) and terminal stations (TS) in terms of function, and the air interface is used to connect the management station and the terminal station.

[0003] Currently, the broadband wireless technology for industrial motion control networks must meet various stringent communication requirements for industrial automation, including ultra-high real-time, ultra-high reliability, ultra-high determinacy, ultra-high stability and network security, etc. While the narrowband wireless technology for industrial process control and sensing networks also has high requirements for reliability, stability and security, but has a greater relaxation in terms of real-time and determinacy compared with industrial motion control networks, and pays more attention to low cost and low power consumption. Therefore, narrowband low-speed wireless communication technologies such as BLE (BlueTooth Low Energy) and Lora (Long Range) have been applied to industrial wireless networks.

[0004] However, the current industrial wireless network has the problem of poor flexibility in the communication process. Summary of the Invention

[0005] The present application provides a communication method, device, equipment, medium and program product for an industrial wireless network, which can improve the communication flexibility of the industrial wireless network.

[0006] In a first aspect, the present application provides a communication method for an industrial wireless network, which is used for a management station in the industrial wireless network. The method includes:

[0007] Mapping downlink narrowband data into first frequency-domain data by using a first resource mapping method, and mapping downlink broadband data into second frequency-domain data by using a second resource mapping method, where the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method;

[0008] Obtaining a downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data;

[0009] Broadcasting the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0010] In one embodiment, the first resource mapping method uses sub - carriers as the frequency - domain resource scheduling unit, and the second resource mapping method uses resource blocks as the frequency - domain resource scheduling unit.

[0011] In one embodiment, the downlink narrow - band data includes broadcast frames, and the broadcast frames include access pilots and system broadcast information;

[0012] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrow - band frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrow - band frequency - domain resources in the narrow - band frequency band.

[0013] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each sub - carrier in the narrow - band frequency band. When any bit is set to a preset value, the bit is used to indicate that the sub - carrier corresponding to the bit is a narrow - band frequency - domain resource.

[0014] In one embodiment, the downlink narrow - band data includes downlink data frames, and the downlink data frames include downlink data pilots and downlink narrow - band service data;

[0015] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrow - band terminal corresponding to the downlink narrow - band service data.

[0016] In one embodiment, mapping the downlink narrow - band data to first - frequency - domain data by using the first resource mapping method includes:

[0017] Combining the downlink data pilot and the downlink narrow - band service data in the time domain and then mapping them onto one or more available sub - carriers in the narrow - band frequency band supported by the management station.

[0018] In one embodiment, when there are multiple available sub - carriers, guard sub - carriers are configured between adjacent sub - carriers among the sub - carriers.

[0019] In one embodiment, when the downlink narrow - band data includes broadcast frames, the method further includes:

[0020] Receiving access feedback information sent by a target narrow - band terminal. The access feedback information is sent by the target narrow - band terminal after receiving the broadcast frame, and the access feedback information is used to indicate the target sub - carriers selected by the target narrow - band terminal from the narrow - band frequency - domain resources, and the number of target sub - carriers is one or more;

[0021] Allocating sub - carrier resources for the target narrow - band terminal according to the access feedback information.

[0022] In one embodiment, allocating sub - carrier resources for the target narrow - band terminal according to the access feedback information includes:

[0023] Detect whether the target sub - carrier is currently occupied;

[0024] If the target sub - carrier is not occupied, allocate the target sub - carrier to the target narrow - band terminal, and update the broadcast frame to update the currently available narrow - band frequency - domain resources.

[0025] In one embodiment, after allocating the target sub - carrier to the target narrow - band terminal, the method further includes:

[0026] Receive the uplink time - domain signals sent by each narrow - band terminal in units of radio frames, where the radio frame corresponds to multiple sub - carriers, each sub - carrier includes the target sub - carrier, each narrow - band terminal includes the target narrow - band terminal, and each uplink time - domain signal has the same CP length;

[0027] Perform joint demodulation processing on each uplink time - domain signal to obtain the uplink narrow - band data corresponding to each uplink time - domain signal.

[0028] In one embodiment, performing joint demodulation processing on each uplink time - domain signal to obtain the uplink narrow - band data corresponding to each uplink time - domain signal includes:

[0029] Perform CP removal processing and FFT processing on each uplink time - domain signal to determine each sub - carrier;

[0030] For each sub - carrier, perform down - conversion processing and filtering processing on the sub - carrier to obtain single - carrier data, and perform base - band demodulation processing on the single - carrier data to obtain uplink narrow - band data.

[0031] In one embodiment, when the number of target sub - carriers is multiple, the access feedback information further includes the correspondence between the target narrow - band terminal and each target sub - carrier. After performing joint demodulation processing on each uplink time - domain signal, the method further includes:

[0032] Pool the uplink narrow - band data corresponding to each target sub - carrier to obtain a link - layer data packet.

[0033] In one embodiment, the uplink narrow - band data includes uplink data pilots and uplink narrow - band service data;

[0034] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrow - band terminal corresponding to the uplink narrow - band service data.

[0035] In a second aspect, the present application provides a communication method for an industrial wireless network, which is used for narrow - band terminals in the industrial wireless network. The method includes:

[0036] Receive the downlink time - domain signal broadcast by the management station in the industrial wireless network;

[0037] Among them, the downlink time-domain signal is obtained by the management station mapping downlink narrowband data into first frequency-domain data using a first resource mapping method, mapping downlink broadband data into second frequency-domain data using a second resource mapping method, and based on the first frequency-domain data and the second frequency-domain data. The frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0038] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0039] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0040] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0041] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0042] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data;

[0043] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0044] In one embodiment, when the downlink narrowband data includes a downlink data frame, the method further includes:

[0045] Performing demodulation processing on all received downlink time-domain signals in the current radio frame respectively to obtain the downlink narrowband data corresponding to each downlink time-domain signal.

[0046] In one embodiment, when the downlink narrowband data includes a broadcast frame, the method further includes:

[0047] Performing blind detection on the downlink time-domain signals broadcast by each management station using the locally generated access pilot. During the blind detection process, if successful synchronization is achieved with the access pilot included in the broadcast frame, the system broadcast information is parsed from the broadcast frame, and one or more target subcarriers are selected from the narrowband frequency-domain resources indicated by the system broadcast information;

[0048] Sending access feedback information to the management station based on the selected target subcarriers;

[0049] Among them, the access feedback information is used to indicate the target subcarriers selected by the narrowband terminal from the narrowband frequency domain resources.

[0050] In one embodiment, after sending the access feedback information to the management station based on the selected target subcarriers, the method further includes:

[0051] Obtaining an updated broadcast frame sent by the management station;

[0052] Determining that the management station allocates target subcarriers to the narrowband terminal according to the updated broadcast frame.

[0053] In one embodiment, the method further includes:

[0054] Sending an uplink time-domain signal to the management station in units of wireless frames on the target subcarriers;

[0055] Among them, the uplink time-domain signal is used for the management station to perform joint demodulation processing on the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals received on the wireless frame, to obtain uplink narrowband data corresponding to each uplink time-domain signal; the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals have the same CP length.

[0056] In one embodiment, the uplink narrowband data includes uplink data pilots and uplink narrowband service data;

[0057] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0058] In a third aspect, the present application provides a communication device for an industrial wireless network, which is used for a management station in the industrial wireless network. The device includes:

[0059] A mapping module, configured to map downlink narrowband data into first frequency-domain data by using a first resource mapping method, and map downlink broadband data into second frequency-domain data by using a second resource mapping method, where the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method;

[0060] An obtaining module, configured to obtain a downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data;

[0061] A broadcasting module, configured to broadcast the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0062] In a fourth aspect, the present application provides a communication device for an industrial wireless network, which is used for a narrowband terminal in the industrial wireless network. The device includes:

[0063] A receiving module, configured to receive a downlink time-domain signal broadcast by a management station in an industrial wireless network;

[0064] Wherein, the downlink time-domain signal is obtained by the management station mapping downlink narrowband data to first frequency-domain data using a first resource mapping method, mapping downlink broadband data to second frequency-domain data using a second resource mapping method, and based on the first frequency-domain data and the second frequency-domain data, and the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0065] In a fifth aspect, the present application provides a wireless device, including a memory, a transceiver, and a processor:

[0066] The memory is configured to store a computer program; the transceiver is configured to transmit and receive data under the control of the processor; the processor is configured to read the computer program in the memory and perform the following operations:

[0067] Map downlink narrowband data to first frequency-domain data using a first resource mapping method, and map downlink broadband data to second frequency-domain data using a second resource mapping method, and the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method;

[0068] Obtain a downlink time-domain signal based on the first frequency-domain data and the second frequency-domain data;

[0069] Control the transceiver to broadcast the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0070] In a sixth aspect, the present application provides a wireless device, including a memory, a transceiver, and a processor:

[0071] The memory is configured to store a computer program; the transceiver is configured to transmit and receive data under the control of the processor; the processor is configured to read the computer program in the memory and perform the following operations:

[0072] Control the transceiver to receive a downlink time-domain signal broadcast by a management station in an industrial wireless network;

[0073] Wherein, the downlink time-domain signal is obtained by the management station mapping downlink narrowband data to first frequency-domain data using a first resource mapping method, mapping downlink broadband data to second frequency-domain data using a second resource mapping method, and based on the first frequency-domain data and the second frequency-domain data, and the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0074] In a seventh aspect, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method described in the first aspect or the second aspect above are implemented.

[0075] In an eighth aspect, the present application provides a computer program product, including a computer program. When the computer program is executed by a processor, the steps of the method described in the first aspect or the second aspect above are implemented.

[0076] For the above communication method, device, equipment, medium and program product of the industrial wireless network, the management station in the industrial wireless network maps the downlink narrowband data into first frequency-domain data by using a first resource mapping method, and maps the downlink broadband data into second frequency-domain data by using a second resource mapping method. The frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method. The management station obtains the downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data, and then the management station broadcasts the downlink time-domain signal to the narrowband terminals and broadband terminals within the coverage range of the management station. In this way, the industrial wireless network in the embodiment of the present application can support both broadband services, such as services with high real-time and high reliability requirements in industrial motion control networks, and narrowband services, such as services with low speed and low power consumption requirements in industrial process control and sensing networks. That is, the embodiment of the present application can not only meet the requirements of field-level motion control service needs, but also be compatible with low-speed communication services, making the communication of the industrial wireless network more flexible and improving the communication flexibility of the industrial wireless network. BRIEF DESCRIPTION OF THE DRAWINGS

[0077] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments of the present application or related technologies. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0078] Figure 1 It is a schematic diagram of a network topology in an industrial wireless network;

[0079] Figure 2 It is a schematic flowchart of the communication method of the industrial wireless network in an embodiment;

[0080] Figure 3 It is a schematic flowchart of the signal processing of the management station in the downlink direction in another embodiment;

[0081] Figure 4 It is a schematic flowchart of the signal processing of the narrowband terminal in the downlink direction in another embodiment;

[0082] Figure 5 Schematic diagram of the signal processing flow of narrowband terminals in the uplink direction in another embodiment;

[0083] Figure 6 Schematic diagram of the process for the management station to obtain uplink narrowband data in another embodiment;

[0084] Figure 7 Schematic diagram of the signal processing flow of the management station in the uplink direction in another embodiment;

[0085] Figure 8 Schematic diagram of an exemplary frequency-domain resource allocation in another embodiment;

[0086] Figure 9 Schematic diagram of an exemplary time-domain resource allocation in another embodiment;

[0087] Figure 10 Structural block diagram of a communication device in an industrial wireless network in one embodiment;

[0088] Figure 11 Structural block diagram of a communication device in an industrial wireless network in another embodiment;

[0089] Figure 12 Internal structure diagram of a computer device in one embodiment. Detailed implementation manners

[0090] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0091] Industrial wireless technology has become a key enabling technology for industrial automation because it can help improve production efficiency, reduce costs, enhance safety and intelligence. Wireless devices in the field of industrial wireless networks can generally be classified into management stations (Management Station, MS) and terminal stations (Terminal Station, TS) in terms of function, and the air interface is used for connection between the management station and the terminal station.

[0092] At present, the broadband wireless technology for industrial motion control networks must meet various stringent communication requirements of industrial automation, including ultra-high real-time, ultra-high reliability, ultra-high determinacy, ultra-high stability, and network security requirements. While the narrowband wireless technology for industrial process control and sensing networks also has high requirements for reliability, stability, and security, it has a greater relaxation in terms of real-time and determinacy compared to industrial motion control networks and pays more attention to low cost and low power consumption. Therefore, narrowband low-speed wireless communication technologies such as BLE (BlueTooth Low Energy) and Lora (Long Range) have been applied to industrial wireless networks.

[0093] However, the inventors of this application have found through research that the current narrowband wireless technology for industrial process control and sensing networks, due to design limitations in various aspects, cannot support higher-rate data transmission and motion control services with higher real-time and higher determinacy requirements.

[0094] For the current broadband wireless technology used in industrial motion control networks, due to the parameter set design, the smallest resource scheduling unit in the frequency domain is 1 PRB (Physical Resource Block), that is, 12 subcarriers. From the perspective of the management station, if at least 1 PRB is allocated to the terminal of a process control or sensing service (hereinafter simply referred to as a low-speed service), there will be a great waste of bandwidth resources, and the number of terminals that an industrial wireless network with a certain total bandwidth can support within a unit scheduling period will be relatively small, far lower than that of a narrowband system with the same total bandwidth.

[0095] Therefore, whether it is an industrial motion control network or an industrial process control and sensing network, the current industrial wireless network has a problem of poor flexibility in the communication process.

[0096] In view of this, the embodiments of this application provide a communication method, device, equipment, medium, and program product for an industrial wireless network, which can improve the communication flexibility of the industrial wireless network.

[0097] The communication method for the industrial wireless network provided by the embodiments of this application can be applied to Figure 1 the implementation environment shown. Among them, a wired cable is used to connect between the controller and the management station, and the controller and the management station can perform wired communication. Industrial devices (such as Figure 1 industrial device 1 to industrial device n shown, where n is a positive integer greater than 1) and the corresponding terminal stations (such as Figure 1 terminal station 1 to terminal station n shown) are connected by wired cables, and the industrial devices and the terminal stations can perform wired communication. The management station and the terminal stations perform wireless communication through the air interface.

[0098] The resource reallocation method provided by the embodiments of this application can be applied to Figure 1 the implementation environment shown. Among them, a wired network or a wireless network is used to connect between the controller and the management station, and the controller and the management station can communicate with each other. Industrial devices (such as Figure 1 Industrial Device 1 to Industrial Device n shown, where n is a positive integer greater than 1) and the corresponding terminal stations (such as Figure 1 Terminal Station 1 to Terminal Station n shown) are connected by a wired network or a wireless network, and the industrial device and the terminal station can communicate with each other. Wireless communication is performed between the management station and the terminal station through the air interface.

[0099] Next, in combination with the accompanying drawings in the embodiments of this application, the technical solutions in the embodiments of this application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0100] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0101] Next, in combination with the accompanying drawings in the embodiments of this application, the technical solutions in the embodiments of this application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0102] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

[0103] In an exemplary embodiment, as shown in Figure 2 a communication method for an industrial wireless network is provided, and this method is described by taking the industrial wireless network shown in Figure 1 as an example. The communication method of this industrial wireless network includes the following steps 201 to step 203:

[0104] Step 201, the management station maps the downlink narrowband data into first frequency-domain data by using a first resource mapping method, and maps the downlink broadband data into second frequency-domain data by using a second resource mapping method.

[0105] Downlink narrowband data may include broadcast frames, where the broadcast frames are at least used to indicate narrowband frequency-domain resources in the narrowband frequency band of the industrial wireless network for narrowband terminals to access the management station. The content of the broadcast frames will be introduced in the following embodiments. The downlink narrowband data may also include downlink data frames. The downlink data frames may be service data transmitted between the management station and the narrowband terminals after the narrowband terminals access the management station, etc. The content of the downlink data frames will be introduced in the following embodiments, and no specific limitation is imposed on the content included in the downlink narrowband data herein.

[0106] Downlink broadband data may include data frames, or similar to the downlink narrowband data, the downlink broadband data may also include broadcast frames, etc. No specific limitation is imposed on the content included in the downlink broadband data herein.

[0107] In the embodiments of this application, the management station can perform broadband resource scheduling and narrowband resource scheduling simultaneously in the frequency domain, that is, the industrial wireless network has both a broadband mode and a narrowband mode. Exemplarily, in the broadband mode, the management station performs resource scheduling with a resource block (RB) as the smallest frequency-domain resource scheduling unit, and the frequency-domain positions of the scheduled multiple resource blocks can be continuous or discrete; in the narrowband mode, the management station performs resource scheduling with a subcarrier as the smallest frequency-domain resource scheduling unit, and the frequency-domain positions of the scheduled multiple subcarriers can be continuous or discrete.

[0108] Based on these two modes, the management station maps the downlink narrowband data to first frequency-domain data using a first resource mapping method, and maps the downlink broadband data to second frequency-domain data using a second resource mapping method, where the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method. This can avoid the problem of bandwidth resource waste caused by scheduling narrowband terminals with the frequency-domain resource scheduling unit (such as a resource block) corresponding to the second resource mapping method. Exemplarily, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0109] Taking the first resource mapping method as an example, when the management station maps the downlink narrowband data to the first frequency-domain data, one modulation symbol can be mapped on one subcarrier. Optionally, to improve transmission reliability, the modulation symbol can also be replicated and mapped onto multiple subcarriers for resource mapping.

[0110] Step 202, the management station obtains a downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data.

[0111] The management station performs OFDM (Orthogonal Frequency Division Multiplexing) signal generation processing on the first frequency-domain data and the second frequency-domain data that have completed frequency-domain mapping, to obtain a downlink time-domain signal.

[0112] Exemplarily, the management station performs processing such as IFFT (Inverse Fast Fourier Transform) and CP (Cyclic Prefix) addition on the first frequency-domain data and the second frequency-domain data, to obtain a downlink time-domain signal.

[0113] Step 203: The management station broadcasts the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0114] As an implementation manner, the management station has multiple antenna ports, the frequency-domain mapping methods on the multiple antenna ports are the same, the signals on each antenna port are the same, and the management station can broadcast the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station through the multiple antenna ports.

[0115] The narrowband terminals and broadband terminals can receive the downlink time-domain signal broadcast by the management station. Taking the narrowband terminal as an example, when the downlink narrowband data includes a broadcast frame, the narrowband terminal can determine narrowband frequency-domain resources based on the downlink time-domain signal to access the management station; when the downlink narrowband data includes a downlink data frame, service transmission between the management station and the narrowband terminal is implemented.

[0116] The industrial wireless network in the embodiments of the present application can support both broadband services, such as services with requirements of high real-time and high reliability in industrial motion control networks, and narrowband services, such as services with requirements of low speed and low power consumption in industrial process control and sensing networks. That is, the embodiments of the present application can not only meet the requirements of field-level motion control service, but also be compatible with low-speed communication services, making the communication of the industrial wireless network more flexible and improving the communication flexibility of the industrial wireless network.

[0117] In one embodiment, based on Figure 2 the embodiments shown below, an exemplary introduction is given to the possible contents of the downlink narrowband data.

[0118] In a possible implementation manner, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information.

[0119] In the embodiments of the present application, the access pilot is determined according to the identity identifier of the management station. For example, the identity identifier of the management station is initialized in sequence to obtain the access pilot, and the length of the access pilot is preset by the protocol, and this length is adhered to end to end. The access pilot can be used for narrowband terminals to perform time-frequency synchronization and channel estimation.

[0120] The system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information.

[0121] Among them, for the center frequency point, it can be represented by a bit sequence of a preset length. For example, the center frequency point is represented by 14 bits. Among the 14 bits, 2 bits are used to represent the frequency band identifier, and 12 bits are used to represent M subcarriers. For example, 5.1 GHz is frequency band 1, 5.8 GHz is frequency band 2. When the subcarrier spacing is 78.125 kHz, the center frequency point 5.81875 GHz is represented as 10010010110000.

[0122] For the resource indication information, the resource indication information is used to indicate the narrowband frequency domain resources in the narrowband frequency band. Optionally, each subcarrier in the narrowband frequency band can be numbered, for example, numbered from 0 to Nscs - 1, where Nscs is the number of each subcarrier, and then the numbers of the available subcarriers are carried in the resource indication information.

[0123] Optionally, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band respectively. In the case where any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency domain resource. Continuing the above example, each subcarrier in the narrowband frequency band is numbered, for example, numbered from 0 to Nscs - 1. Then, a bitmap with a length of log2 (Nscs) can be used to represent the available subcarriers in the narrowband frequency band. If the corresponding bit position in the bitmap is set to a preset value (for example, 1), it means that the subcarrier corresponding to the bit is available.

[0124] In the embodiments of the present application, the broadcast frame can be sent using any one or more subcarriers within the bandwidth of the industrial wireless network except for the subcarriers already used in the broadband mode, and the broadcast frames on multiple subcarriers are the same.

[0125] In the case where the downlink narrowband data includes a broadcast frame, the narrowband terminal does not know the subcarrier where the broadcast frame is located and the identity identifier of the management station before accessing the management station. Therefore, the narrowband terminal needs to perform blind detection first when attempting to access the management station.

[0126] Exemplarily, the narrowband terminal locally generates access pilots corresponding to the identity identifiers of different management stations, blindly detects the downlink time-domain signals broadcast by each management station using these locally generated access pilots, traverses the signals on all subcarriers using the locally generated access pilots and performs correlation matching to obtain the time-frequency synchronization with the access pilots sent by the corresponding management station. During the blind detection process, if successful synchronization is achieved with the access pilot included in a certain broadcast frame, the system broadcast information is parsed from the broadcast frame, and one or more target subcarriers are selected from the narrowband frequency-domain resources indicated by the system broadcast information.

[0127] The narrowband terminal sends access feedback information to the management station based on the selected target subcarriers. The access feedback information is used to indicate the target subcarriers selected by the narrowband terminal from the narrowband frequency-domain resources, and the number of target subcarriers is one or more.

[0128] The management station receives the access feedback information sent by the target narrowband terminal, and the management station allocates subcarrier resources for the target narrowband terminal according to the access feedback information.

[0129] Exemplarily, the management station can detect whether the target subcarriers selected by the narrowband terminal are currently occupied; if the target subcarriers are not occupied, the target subcarriers are allocated to the target narrowband terminal, and the broadcast frame is updated to update the currently available narrowband frequency-domain resources.

[0130] The narrowband terminal can then obtain the updated broadcast frame sent by the management station, and determine the target subcarriers allocated by the management station for the narrowband terminal according to the updated broadcast frame.

[0131] For example, the management station sets the bit corresponding to the target subcarrier to 0 in the bitmap to indicate that it is occupied, and refreshes the resource indication information in the broadcast frame when broadcasting the next frame. Communication with the narrowband terminal starts on the target subcarrier in the next frame. Optionally, the subcarrier number corresponding to the target subcarrier can be configured as the identity identifier of the narrowband terminal.

[0132] If the target subcarriers selected by the narrowband terminal are occupied by other narrowband terminals, exemplarily, the management station will not perform subsequent communication with this narrowband terminal. If this narrowband terminal does not receive a response from the management station after a set time, it may need to continue listening to the broadcast frame. If it is found that the target subcarriers it applied to use before in the broadcast frame have become occupied, it can re-select subcarriers from the unoccupied subcarriers and re-apply to the management station for access.

[0133] In the embodiments of the present application, the number of target subcarriers selected by the narrowband terminal can be one or more. When the number of target subcarriers is more than one, the access feedback information further includes the correspondence between the narrowband terminal and each target subcarrier. Exemplarily, the access feedback information includes the correspondence between the subcarrier numbers of multiple target subcarriers and the identity identifier of the narrowband terminal, so as to facilitate the aggregation and correspondence of end-to-end service data content. This part of the content will be introduced in the following embodiments.

[0134] In the embodiments of the present application, the broadcast frame and the access feedback information can uniformly use the modulation method and coding rate pre-specified by the protocol, such as QPSK (Quadrature Phase Shift Keying) 1 / 2. This modulation method will be continuously used until the management station issues modulation information for adjustment. After that, the management station will issue the modulation method and packet size of the uplink and downlink data packets to be scheduled on each subcarrier through the downlink data frame.

[0135] The above embodiments introduce the case where the downlink narrowband data includes a broadcast frame. In another possible implementation, the downlink narrowband data includes a downlink data frame.

[0136] The downlink data frame includes downlink data pilots and downlink narrowband service data.

[0137] Among them, the downlink data pilots are generated by sequences with good cross-correlation, and can be ZC (Zadoff-Chu) sequences, PN (Pseudo-Noise) sequences, Gold (optimized version of PN) sequences, etc.

[0138] Exemplarily, the downlink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data. For example, the downlink data pilots are obtained by initializing the sequence with the identity identifier of the management station and the identity identifier of the narrowband terminal. The length of the downlink data pilots is also preset by the protocol, and the end-to-end system follows this length. The downlink data pilots can be used by the narrowband terminal for time-frequency synchronization and channel estimation.

[0139] In the embodiments of the present application, when mapping the downlink narrowband data to the first frequency-domain data using the first resource mapping method, the management station combines the downlink data pilots and the downlink narrowband service data in the time domain and then maps them onto one or more available subcarriers in the narrowband frequency band supported by the management station. Optionally, when there are multiple available subcarriers, guard subcarriers are configured between adjacent subcarriers. That is, when the management station performs subcarrier scheduling, in order to ensure communication performance, one or more subcarriers can be reserved between two adjacent scheduled subcarriers as guard subcarriers to reduce the impact of inter-carrier interference.

[0140] If the management station communicates with multiple narrowband terminals simultaneously, the management station generates multiple groups of downlink data pilots according to the combinations of the identity identifiers of different management stations and the identity identifiers of narrowband terminals. After combining with the downlink narrowband service data on multiple subcarriers in the time domain, they are respectively scheduled to the corresponding subcarrier frequencies.

[0141] See Figure 3 , Figure 3 Figure [0000310] is a schematic diagram of the signal processing flow of the management station for narrowband services in an exemplary downlink direction ( Figure 3 the bit-level processing flow of the downlink narrowband service data included in the downlink data pilot is not shown).

[0142] The access pilot and the downlink data pilot are obtained by initializing the sequence with the corresponding base sequences (the access pilot corresponds to the identity identifier of the management station, and the downlink data pilot corresponds to the identity identifiers of the management station and the narrowband terminal). Exemplarily, after the base sequence undergoes constellation mapping digital modulation, it forms BPSK (Binary Phase Shift Keying) or QPSK symbols. When performing resource mapping, one modulation symbol is mapped to each subcarrier. That is, if the number of pilot symbols is N, then N OFDM symbols are required for mapping to be completed.

[0143] In the narrowband mode, the bit-level processing of data from adding check bits to constellation mapping of digital modulation can be the same as that in the broadband mode. For example, taking the system broadcast information included in the broadcast frame as an example, see Figure 3 , after the information bits corresponding to the system broadcast information are generated, through adding check bits, channel coding, rate matching, scrambling, and constellation mapping, modulation symbols are formed, and then multi-stream replication is performed with the modulation symbols corresponding to the access pilot. Multi-stream replication means replicating the modulation symbols multiple times so that they can be mapped to multiple carriers in the resource mapping stage, and then resource mapping is performed. The bit-level processing of the downlink narrowband service data included in the downlink data pilot ( Figure 3 not shown) is similar to that of the system broadcast information.

[0144] Of course, in the narrowband mode, the bit-level processing of data can also adopt more simple and more suitable coding and decoding technologies for smaller data block lengths to reduce the transmission and reception processing complexity of narrowband terminals, which is not limited here.

[0145] In the embodiments of this application, in the narrowband mode, when mapping pilots (access pilots and downlink data pilots) and data (system broadcast information and downlink narrowband service data) to resources, one modulation symbol is mapped to each subcarrier. For a wireless frame, the number of symbols remaining for data transmission in this frame is obtained by subtracting the number of pilot symbols and the number of guard symbols from the total number of OFDM symbols in this frame.

[0146] The following gives an exemplary introduction to the processing procedure of narrowband terminals for narrowband services in the downlink direction.

[0147] When the downlink narrowband data includes downlink data frames, the narrowband terminal demodulates all the downlink time-domain signals received in the current radio frame respectively to obtain the downlink narrowband data corresponding to each downlink time-domain signal.

[0148] See Figure 4 , Figure 4 which is a schematic diagram of the signal reception and processing flow of narrowband terminals for narrowband services in the downlink direction by way of example.

[0149] When the narrowband terminal performs blind search for network before the access management station, it performs blind search on each possible frequency point to obtain the time-frequency synchronization with the access pilot. The frequency point at which the time-frequency synchronization is obtained at this time is the frequency point to be down-converted. The narrowband terminal performs down-conversion on all subcarriers as a whole. The subcarriers carry the downlink time-domain signals, and then BPF (Band-Pass Filter) and ADC (Analog-to-Digital Converter) processing are performed.

[0150] Next, the narrowband terminal continues to perform down-conversion processing on the subcarriers that have not been down-converted to 0 frequency in each subcarrier respectively according to the center frequency point obtained from the broadcast frame and the subcarrier numbers obtained from the access feedback information. After the down-conversion processing, LPF (Low-Pass Filter) processing and baseband demodulation processing are performed, so as to demodulate the downlink narrowband data.

[0151] In the embodiments of the present application, when the narrowband terminal performs baseband processing, it is similar to the processing of broadband signals. First, CP removal processing is performed, and then constellation demapping processing and the like are performed. Different from the processing of broadband signals, the narrowband terminal needs to wait until all OFDM symbols of the current radio frame are collected (for example, all OFDM symbols carrying access pilots, OFDM symbols carrying system broadcast information, OFDM symbols carrying downlink data pilots, OFDM symbols carrying downlink narrowband service data) before subsequent processing can be performed. That is, in the time domain, the entire radio frame is used as a time-domain resource scheduling unit.

[0152] The above embodiments take narrowband services as an example and briefly introduce the downlink communication process. The following gives an exemplary introduction to the uplink communication process.

[0153] Narrowband terminal access management station. After the management station allocates target subcarriers to the narrowband terminal, the narrowband terminal can send an uplink time-domain signal to the management station in units of wireless frames on the target subcarriers. Among them, the uplink time-domain signal is used for the management station to perform joint demodulation processing on the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals received on the wireless frame, so as to obtain uplink narrowband data corresponding to each uplink time-domain signal. The uplink time-domain signal has the same CP length as the uplink time-domain signals sent by other narrowband terminals. The process of the management station demodulating and processing to obtain each uplink narrowband data will be introduced in the following embodiments.

[0154] In the embodiments of the present application, the uplink narrowband data may include uplink data pilots and uplink narrowband service data. Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data. The length of the uplink data pilots can be preset by the protocol and is adhered to end-to-end. It should be noted that in the embodiments of the present application, the lengths of various pilots used in the narrowband mode can be flexibly set during implementation and are not specifically limited here.

[0155] See Figure 5 , Figure 5 FIG. is a schematic diagram of the signal transmission processing flow of the narrowband terminal for narrowband services in the exemplary uplink direction.

[0156] In the uplink direction, the narrowband terminal will send uplink data pilots and uplink narrowband service data on the subcarrier resources. Please combine Figure 5 , for the uplink narrowband service data, after generating information bits, the addition of parity bits, channel coding, and constellation mapping can be the same as in the broadband mode.

[0157] Among them, rate matching is to extend and fill zeros at the end of the bit stream after encoding the information bits to ensure that all the redundant OFDM symbols after modulation are fully occupied; multi-stream replication is to replicate the uplink narrowband service data multiple times and map it to multiple carriers during the resource mapping stage.

[0158] The uplink data pilots generate corresponding group base sequences according to the combination of the identity identifier of the management station and the identity identifier of the narrowband terminal, generate the uplink data pilots, and after resource mapping and framing with the corresponding uplink narrowband service data, each stream respectively generates a baseband waveform through shaping filtering. The same CP length is added in each OFDM symbol period according to the broadband mode, so as to ensure that the OFDM symbols of the narrowband have the same symbol length as the OFDM symbols of the broadband, and the start of each symbol is aligned. The narrowband terminal then performs a series of subsequent RF (Radio Frequency) processing and tunes to the corresponding subcarrier frequency points. After the management station receives it, it can uniformly perform CP removal processing, IFFT operation, etc.

[0159] In the embodiments of the present application, the narrowband terminal has the RF transmission function of the narrowband waveform, meets the requirements of indicators such as frequency error accuracy and out-of-band energy suppression. To improve the transmission performance, the narrowband terminal can also be configured with a radio frequency switching protection time. Similarly, the management station can also be configured with a radio frequency switching protection time.

[0160] In the embodiments of the present application, the narrowband terminal can also support frequency hopping in the frequency domain or time-domain repeated transmission to improve reliability. The hopping pattern and the number of time-domain repetitions can be broadcast through the system broadcast information included in the broadcast frame.

[0161] See Figure 6 , after the narrowband terminal sends the uplink time-domain signal to the management station in units of wireless frames on the target subcarrier, the communication method of the industrial wireless network in the embodiments of the present application further includes Figure 6 the steps 601 to 602 shown in

[0162] Step 601, the management station receives the uplink time-domain signals sent by each narrowband terminal in units of wireless frames.

[0163] Among them, the wireless frame corresponds to multiple subcarriers, each subcarrier includes the target subcarrier, each narrowband terminal includes the target narrowband terminal, and each uplink time-domain signal has the same CP length.

[0164] Step 602, the management station performs joint demodulation processing on each uplink time-domain signal to obtain the uplink narrowband data corresponding to each uplink time-domain signal.

[0165] In a possible implementation manner of step 602, the management station can perform CP removal processing and FFT (Fast Fourier Transform) processing on each uplink time-domain signal to determine each subcarrier, that is, remove the CP from each uplink time-domain signal and transform it to the frequency domain through FFT processing. Then, for each subcarrier, the management station performs down-conversion processing and filtering processing on the subcarrier, extracts the single-carrier data, and performs baseband demodulation processing on the single-carrier data to obtain the uplink narrowband data.

[0166] See Figure 7 , Figure 7 is a schematic diagram of the signal reception and processing flow of the management station for narrowband services in the uplink direction as an example.

[0167] For narrowband services, when the management station receives uplink signals, after removing the cyclic prefix (CP) and performing fast Fourier transform (FFT) on all received uplink time-domain signals to transform them into the frequency domain, the subcarriers of each data are down-converted to frequency 0. Then, a low-pass filter is used to extract the single-carrier data to reduce the impact of adjacent subcarriers on its performance. After extracting all the subcarriers of this OFDM symbol in sequence, the extraction of the single-carrier data of the next OFDM symbol is carried out. Similar to the receiving and processing process in the downlink direction, after the management station has collected all the pilot symbols or data symbols on each subcarrier, subsequent baseband demodulation processing can be started.

[0168] In the embodiments of the present application, when the number of target subcarriers is multiple, the access feedback information further includes the correspondence between the target narrowband terminal and each target subcarrier. After the management station performs joint demodulation processing on each uplink time-domain signal, it can also perform aggregation processing on the uplink narrowband data corresponding to each target subcarrier to obtain a link layer data packet. That is, the information demodulated from different subcarriers of the same narrowband terminal needs to be aggregated together to form a complete link layer data packet.

[0169] In the above embodiments, the frame structures of the broadcast frame, uplink data frame, downlink data frame, and access feedback information can be flexibly set during implementation, and specific limitations are not made here.

[0170] In the above embodiments, the subcarrier resources within the bandwidth can be divided into a wideband area and a narrowband area using the current OFDM system architecture. The wideband area can perform resource scheduling in units of resource blocks and time slots, and the narrowband area performs resource scheduling in units of subcarriers and frames. Multiple carriers can be used for communication with the same narrowband terminal, and no architectural changes are required for both the management station and the terminal side. The transmitter of the narrowband terminal only needs to use the same bit and symbol-level processing as the management station, with the same parameter set, and add CP to the time-domain waveform to simulate the OFDM symbol structure; the receiver of the narrowband terminal is a multi-carrier receiver. Thus, without the need for two sets of network protocols, it can support both wideband services, such as services with high real-time and high reliability requirements in industrial motion control networks, and narrowband services, such as services with low speed and low power consumption requirements in industrial process control and sensing networks. The narrowband terminal does not need to support a complex OFDM system and can access the industrial wireless network at a very low cost, providing high-performance and diverse wireless bearers for industrial digitalization and intelligence, and fusing the wideband OFDM system and the narrowband FDM (Frequency Division Multiplexing) system at the physical layer waveform with relatively low difficulty.

[0171] In one embodiment, a communication method for an industrial wireless network is provided, which is used for a narrowband terminal in the industrial wireless network. The method includes:

[0172] Receive the downlink time-domain signal broadcast by the management station in the industrial wireless network;

[0173] Among them, the downlink time-domain signal is obtained by the management station mapping the downlink narrowband data into the first frequency-domain data using the first resource mapping method, mapping the downlink broadband data into the second frequency-domain data using the second resource mapping method, and the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0174] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0175] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0176] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0177] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0178] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data;

[0179] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0180] In one embodiment, when the downlink narrowband data includes a downlink data frame, the method further includes:

[0181] Demodulate each received downlink time-domain signal in the current wireless frame to obtain the downlink narrowband data corresponding to each downlink time-domain signal.

[0182] In one embodiment, when the downlink narrowband data includes a broadcast frame, the method further includes:

[0183] Perform blind detection on the downlink time-domain signals broadcast by each management station using the locally generated access pilot. During the blind detection process, if successful synchronization is achieved with the access pilot included in the broadcast frame, parse the system broadcast information from the broadcast frame, and select one or more target subcarriers from the narrowband frequency-domain resources indicated by the system broadcast information;

[0184] Send access feedback information to the management station based on the selected target subcarriers;

[0185] Among them, the access feedback information is used to indicate the target subcarriers selected by the narrowband terminal from the narrowband frequency domain resources.

[0186] In one embodiment, after sending the access feedback information to the management station based on the selected target subcarriers, the method further includes:

[0187] Obtain the updated broadcast frame sent by the management station;

[0188] Determine that the management station allocates target subcarriers for the narrowband terminal according to the updated broadcast frame.

[0189] In one embodiment, the method further includes:

[0190] Send an uplink time-domain signal to the management station in units of wireless frames on the target subcarriers;

[0191] Among them, the uplink time-domain signal is used for the management station to perform joint demodulation processing on the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals received on the wireless frame, and obtain the uplink narrowband data corresponding to each uplink time-domain signal; the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals have the same CP length.

[0192] In one embodiment, the uplink narrowband data includes uplink data pilots and uplink narrowband service data;

[0193] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0194] Regarding the implementation manners and beneficial effects of the communication method for the industrial wireless network of the narrowband terminal, reference can be made to the relevant descriptions in the above embodiments of the communication method for the industrial wireless network of the management station, which will not be elaborated here.

[0195] Hereinafter, through examples, the resource allocation in the communication method of the industrial wireless network according to the embodiments of the present application will be introduced exemplarily.

[0196] Example 1:

[0197] See Figure 8 , Figure 8 which is a schematic diagram of an exemplary frequency domain resource allocation.

[0198] In an industrial wireless system with a certain bandwidth, k broadband resources are allocated, each broadband consists of Nk RBs, and each RB corresponds to a certain number of subcarriers. For example, Figure 8Among them, N1 RB resources are allocated to the wideband TS#1, and Nk RB resources are allocated to the wideband TS#k (#1 and #k are the identity identifiers of the wideband TS). Figure 8 The Fc_WB (Wide band) shown is the center frequency of the wideband frequency band.

[0199] Outside the wideband resources, q narrowband subcarrier resources are also allocated, which are respectively allocated to the narrowband broadcast frame and m narrowband TSs. Figure 8 The Fc_NB (Narrow band)#1 shown is the center frequency of the subcarrier with subcarrier number #1, and so on. Figure 8 It can be seen that some narrowband TSs are allocated 1 subcarrier (such as narrowband TS#1, #1 is the identity identifier of the narrowband TS), some narrowband TSs are allocated 2 subcarriers (such as narrowband TS#2), and more can also be allocated according to the data bandwidth requirements, etc. There is one subcarrier interval between subcarriers as a guard subcarrier to avoid inter-carrier interference, or continuous use without interval can also be selected.

[0200] Example 2:

[0201] See Figure 9 , Figure 9 which is an exemplary time-domain resource allocation schematic diagram. Figure 9 The 1 wireless frame (1 ms) shown contains 8 time slots, each time slot is 125 us, and the subcarrier spacing (Subcarrier Spacing, SCS) is 78.125 kHz.

[0202] Figure 9 It shows the wideband frame structure and narrowband frame structure under a certain parameter set. The narrowband frame structure is time-aligned with the downlink and uplink frames of the wideband frame structure. The downlink and uplink of the wideband frame structure are each divided into 4 time slots, and each time slot has 9 OFDM symbols. The narrowband frame structure does not divide time slots, and the entire downlink or uplink frame is used as a scheduling unit.

[0203] Among them, Figure 9The DTCH (Downlink Transport Channel) shown is the downlink transport channel, the UTCH (Uplink Transport Channel) is the uplink transport channel, the DSS (Downlink Synchronization Signal) is the downlink synchronization signal, the DRS (Downlink Reference Signa) is the downlink reference signal, the USS (UplinkSynchronization Signal) is the uplink synchronization signal, and the URS (Uplink Reference Signa) is the uplink reference signal. A-Pilot (Access-Pilot) is the access pilot, and the DBCH (Downlink Broadcasting Channel) is the downlink broadcast channel, carrying system broadcast information; UL Data-Pilot (Uplink Data Pilot) is the uplink data pilot, DLData-Pilot (Downlink Data Pilot) is the downlink data pilot, the NB-UTCH is used to carry uplink narrowband service data, and the NB-DTCH is used to carry downlink narrowband service data.

[0204] It should be understood that although the steps in the flowcharts involved in the above-described embodiments are shown in sequence according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless there is a clear description in this article, the execution of these steps has no strict order limitation, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-described embodiments may include multiple steps or multiple stages. These steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be executed alternately or in turn with at least a part of other steps or steps or stages in other steps.

[0205] Based on the same inventive concept, the embodiments of the present application also provide a communication device for an industrial wireless network for implementing the communication method of the industrial wireless network involved above. The implementation solutions provided by this device to solve problems are similar to the implementation solutions described in the above method. Therefore, the specific limitations in one or more embodiments of the communication device for an industrial wireless network provided below can refer to the limitations on the communication method of the industrial wireless network in the above text, and will not be repeated here.

[0206] In an exemplary embodiment, as Figure 10 shown, a communication device for an industrial wireless network is provided for a management station in the industrial wireless network. The device includes:

[0207] The mapping module 1001 is configured to map the downlink narrowband data into first frequency-domain data by using a first resource mapping manner, and map the downlink broadband data into second frequency-domain data by using a second resource mapping manner. The frequency-domain resource scheduling unit corresponding to the first resource mapping manner is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping manner.

[0208] The obtaining module 1002 is configured to obtain a downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data.

[0209] The broadcasting module 1003 is configured to broadcast the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0210] In one embodiment, the first resource mapping manner uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping manner uses a resource block as the frequency-domain resource scheduling unit.

[0211] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information.

[0212] Wherein, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0213] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band respectively. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0214] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data.

[0215] Wherein, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0216] In one embodiment, the mapping module 1001 is specifically configured to map the downlink data pilot and the downlink narrowband service data onto one or more available subcarriers in the narrowband frequency band supported by the management station after combining them in the time domain.

[0217] In one embodiment, when there are multiple available subcarriers, guard subcarriers are configured between adjacent subcarriers among the subcarriers.

[0218] In one embodiment, when the downlink narrowband data includes a broadcast frame, the device further includes:

[0219] A first receiving module, configured to receive access feedback information sent by a target narrowband terminal, where the access feedback information is sent by the target narrowband terminal after receiving a broadcast frame, and the access feedback information is used to indicate target subcarriers selected by the target narrowband terminal from narrowband frequency domain resources, and the number of target subcarriers is one or more;

[0220] An allocation module, configured to allocate subcarrier resources to the target narrowband terminal according to the access feedback information.

[0221] In one embodiment, the allocation module is specifically configured to detect whether the target subcarriers are currently occupied; if the target subcarriers are not occupied, allocate the target subcarriers to the target narrowband terminal, and update the broadcast frame to update the currently available narrowband frequency domain resources.

[0222] In one embodiment, the apparatus further includes:

[0223] A second receiving module, configured to receive uplink time domain signals sent by each narrowband terminal in units of radio frames after the allocation module allocates the target subcarriers to the target narrowband terminal, where a radio frame corresponds to multiple subcarriers, each subcarrier includes the target subcarriers, each narrowband terminal includes the target narrowband terminal, and each uplink time domain signal has the same CP length;

[0224] A demodulation processing module, configured to perform joint demodulation processing on each uplink time domain signal to obtain uplink narrowband data corresponding to each uplink time domain signal.

[0225] In one embodiment, the demodulation processing module is specifically configured to perform CP removal processing and FFT processing on each uplink time domain signal to determine each subcarrier; for each subcarrier, perform down-conversion processing and filtering processing on the subcarrier to obtain single-carrier data, and perform baseband demodulation processing on the single-carrier data to obtain uplink narrowband data.

[0226] In one embodiment, when the number of target subcarriers is multiple, the access feedback information further includes the correspondence between the target narrowband terminal and each target subcarrier, and the apparatus further includes:

[0227] An aggregation processing module, configured to perform aggregation processing on the uplink narrowband data corresponding to each target subcarrier after the demodulation processing module performs joint demodulation processing on each uplink time domain signal to obtain a link layer data packet.

[0228] In one embodiment, the uplink narrowband data includes uplink data pilots and uplink narrowband service data;

[0229] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0230] It should be noted here that the communication device of the industrial wireless network provided in the embodiments of the present application can implement all the method steps implemented by the communication method embodiments of the industrial wireless network for the management station, and can achieve the same technical effects. Therefore, the same parts and beneficial effects as those in the method embodiments will not be specifically described in this embodiment. Each module in the communication device of the above industrial wireless network can be implemented in whole or in part by software, hardware, and their combinations. The above-mentioned modules can be embedded in the processor in the management station in the form of hardware or independent of the processor, or stored in the memory in the management station in the form of software, so as to facilitate the processor to call and execute the operations corresponding to the above-mentioned modules.

[0231] In an exemplary embodiment, as Figure 11 shown, a communication device for an industrial wireless network is provided for narrowband terminals in the industrial wireless network. The device includes:

[0232] A receiving module 1101, configured to receive a downlink time-domain signal broadcast by a management station in the industrial wireless network;

[0233] Among them, the downlink time-domain signal is obtained by the management station mapping downlink narrowband data into first frequency-domain data using a first resource mapping method, mapping downlink broadband data into second frequency-domain data using a second resource mapping method, and based on the first frequency-domain data and the second frequency-domain data. The frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0234] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0235] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0236] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0237] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0238] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data;

[0239] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0240] In one embodiment, when the downlink narrowband data includes a downlink data frame, the device further includes:

[0241] A demodulation processing module, configured to perform demodulation processing on all received downlink time-domain signals in the current wireless frame respectively, to obtain downlink narrowband data corresponding to each downlink time-domain signal.

[0242] In one embodiment, when the downlink narrowband data includes a broadcast frame, the device further includes:

[0243] A blind detection module, configured to perform blind detection on the downlink time-domain signals broadcast by each management station by using the access pilot generated locally. During the blind detection process, if successful synchronization is achieved with the access pilot included in the broadcast frame, system broadcast information is parsed from the broadcast frame, and one or more target subcarriers are selected from the narrowband frequency-domain resources indicated by the system broadcast information;

[0244] A first transmission module, configured to transmit access feedback information to the management station based on the selected target subcarriers;

[0245] Among them, the access feedback information is used to indicate the target subcarriers selected by the narrowband terminal from the narrowband frequency-domain resources.

[0246] In one embodiment, the device further includes:

[0247] An acquisition module, configured to acquire the updated broadcast frame sent by the management station after the first transmission module transmits the access feedback information to the management station based on the selected target subcarriers;

[0248] A determination module, configured to determine the target subcarriers allocated by the management station for the narrowband terminal according to the updated broadcast frame.

[0249] In one embodiment, the device further includes:

[0250] A second transmission module, configured to transmit an uplink time-domain signal to the management station in units of wireless frames on the target subcarriers;

[0251] Among them, the uplink time-domain signal is used for the management station to perform joint demodulation processing on the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals received on the wireless frame, to obtain uplink narrowband data corresponding to each uplink time-domain signal; the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals have the same CP length.

[0252] In one embodiment, the uplink narrowband data includes an uplink data pilot and uplink narrowband service data;

[0253] Among them, the uplink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0254] It should be noted here that the communication device of the industrial wireless network provided in the embodiment of the present application can implement all the method steps implemented by the above-mentioned communication method embodiment of the industrial wireless network for narrowband terminals, and can achieve the same technical effects. The same parts and beneficial effects as those in the method embodiment will not be specifically described herein. Each module in the above-mentioned communication device of the industrial wireless network can be implemented in whole or in part by software, hardware, and their combination. The above-mentioned modules can be embedded in or independent of the processor in the narrowband terminal in the form of hardware, or stored in the memory in the narrowband terminal in the form of software, so as to facilitate the processor to call and execute the operations corresponding to the above-mentioned modules.

[0255] In an exemplary embodiment, a computer device is provided. The computer device is a wireless device in an industrial wireless network. The computer device can be a management station or a narrowband terminal, and its internal structure diagram can be as Figure 12 shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, abbreviated as I / O), and a communication interface. Among them, the processor, the memory, and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store time synchronization data. The input / output interface of the computer device is used to exchange information between the processor and external devices. The communication interface of the computer device is used to communicate with external terminals through a network connection. When the computer program is executed by the processor, it implements a communication method for an industrial wireless network.

[0256] Those skilled in the art can understand that Figure 12 the structure shown in

[0257] In an exemplary embodiment, a computer device is provided. The computer device may be a management station in an industrial wireless network and includes a memory, a transceiver, and a processor. The memory is used to store computer programs; the transceiver is used to transmit and receive data under the control of the processor; the processor is used to read the computer programs in the memory and perform the following operations:

[0258] Map the downlink narrowband data to first frequency-domain data using a first resource mapping method, and map the downlink broadband data to second frequency-domain data using a second resource mapping method. The frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method;

[0259] Obtain the downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data;

[0260] Control the transceiver to broadcast the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0261] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0262] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0263] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0264] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0265] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data;

[0266] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0267] In one embodiment, when the processor executes the computer program, the following steps are specifically implemented:

[0268] Combine the downlink data pilot and the downlink narrowband service data in the time domain and map them onto one or more available subcarriers in the narrowband frequency band supported by the management station.

[0269] In one embodiment, when there are multiple available subcarriers, guard subcarriers are configured between adjacent subcarriers in each subcarrier.

[0270] In one embodiment, when the downlink narrowband data includes a broadcast frame, the following steps are further implemented when the processor executes the computer program:

[0271] Control the transceiver to receive the access feedback information sent by the target narrowband terminal. The access feedback information is sent by the target narrowband terminal after receiving the broadcast frame, and is used to indicate the target subcarriers selected by the target narrowband terminal from the narrowband frequency domain resources. The number of target subcarriers is one or more;

[0272] Allocate subcarrier resources to the target narrowband terminal according to the access feedback information.

[0273] In one embodiment, the following steps are specifically implemented when the processor executes the computer program:

[0274] Detect whether the target subcarrier is currently occupied;

[0275] If the target subcarrier is not occupied, allocate the target subcarrier to the target narrowband terminal and update the broadcast frame to update the currently available narrowband frequency domain resources.

[0276] In one embodiment, after allocating the target subcarrier to the target narrowband terminal, the following steps are further implemented when the processor executes the computer program:

[0277] Control the transceiver to receive the uplink time-domain signals sent by each narrowband terminal in units of radio frames. Wherein, the radio frame corresponds to multiple subcarriers, each subcarrier includes the target subcarrier, each narrowband terminal includes the target narrowband terminal, and each uplink time-domain signal has the same CP length;

[0278] Perform joint demodulation processing on each uplink time-domain signal to obtain the uplink narrowband data corresponding to each uplink time-domain signal.

[0279] In one embodiment, the following steps are specifically implemented when the processor executes the computer program:

[0280] Perform CP removal processing and FFT processing on each uplink time-domain signal to determine each subcarrier;

[0281] For each subcarrier, perform down-conversion processing and filtering processing on the subcarrier to obtain single-carrier data, and perform baseband demodulation processing on the single-carrier data to obtain uplink narrowband data.

[0282] In one embodiment, when the number of target subcarriers is multiple, the access feedback information further includes the correspondence between the target narrowband terminal and each target subcarrier. After jointly demodulating each uplink time-domain signal, when the processor executes the computer program, the following steps are further implemented:

[0283] Pool the uplink narrowband data corresponding to each target subcarrier to obtain a link layer data packet.

[0284] In one embodiment, the uplink narrowband data includes uplink data pilots and uplink narrowband service data;

[0285] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0286] In an exemplary embodiment, a computer device is provided. The computer device may be a narrowband terminal in an industrial wireless network, including a memory, a transceiver, and a processor. The memory is used to store a computer program; the transceiver is used to transmit and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations:

[0287] Control the transceiver to receive the downlink time-domain signal broadcast by the management station in the industrial wireless network;

[0288] Among them, the downlink time-domain signal is obtained by the management station mapping the downlink narrowband data into first frequency-domain data using a first resource mapping method, mapping the downlink broadband data into second frequency-domain data using a second resource mapping method, and the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0289] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0290] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0291] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0292] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0293] In one embodiment, the downlink narrowband data includes downlink data frames, and the downlink data frames include downlink data pilots and downlink narrowband service data;

[0294] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0295] In one embodiment, when the downlink narrowband data includes downlink data frames, the processor further implements the following steps when executing the computer program:

[0296] Demodulate each of the received downlink time-domain signals in the current radio frame to obtain the downlink narrowband data corresponding to each downlink time-domain signal.

[0297] In one embodiment, when the downlink narrowband data includes broadcast frames, the processor further implements the following steps when executing the computer program:

[0298] Blindly detect the downlink time-domain signals broadcast by each management station using the locally generated access pilot. During the blind detection process, if successful synchronization is achieved with the access pilot included in the broadcast frame, parse the system broadcast information from the broadcast frame, and select one or more target subcarriers from the narrowband frequency-domain resources indicated by the system broadcast information;

[0299] Control the transceiver to send access feedback information to the management station based on the selected target subcarriers;

[0300] Among them, the access feedback information is used to indicate the target subcarriers selected by the narrowband terminal from the narrowband frequency-domain resources.

[0301] In one embodiment, after sending the access feedback information to the management station based on the selected target subcarriers, the processor further implements the following steps when executing the computer program:

[0302] Obtain the updated broadcast frame sent by the management station;

[0303] Determine the target subcarriers allocated by the management station for the narrowband terminal according to the updated broadcast frame.

[0304] In one embodiment, the processor further implements the following steps when executing the computer program:

[0305] Control the transceiver to send an uplink time-domain signal to the management station in units of radio frames on the target subcarriers;

[0306] Among them, the uplink time-domain signal is used for the management station to perform joint demodulation processing on the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals received on the radio frame to obtain the uplink narrowband data corresponding to each uplink time-domain signal; the uplink time-domain signal has the same CP length as the uplink time-domain signals sent by other narrowband terminals.

[0307] In one embodiment, the uplink narrowband data includes uplink data pilots and uplink narrowband service data;

[0308] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0309] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0310] Map the downlink narrowband data to first frequency-domain data by using a first resource mapping method, and map the downlink broadband data to second frequency-domain data by using a second resource mapping method. The frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method;

[0311] Obtain a downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data;

[0312] Broadcast the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0313] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0314] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0315] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0316] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0317] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes downlink data pilots and downlink narrowband service data;

[0318] Among them, the downlink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0319] In one embodiment, when the computer program is executed by a processor, the following steps are specifically implemented:

[0320] The downlink data pilot and the downlink narrowband service data are combined in the time domain and then mapped onto one or more available subcarriers in the narrowband frequency band supported by the management station.

[0321] In one embodiment, when there are multiple available subcarriers, guard subcarriers are configured between adjacent subcarriers among the subcarriers.

[0322] In one embodiment, when the downlink narrowband data includes a broadcast frame, when the computer program is executed by a processor, the following steps are further implemented:

[0323] Receiving access feedback information sent by a target narrowband terminal, where the access feedback information is sent by the target narrowband terminal after receiving the broadcast frame, and the access feedback information is used to indicate the target subcarriers selected by the target narrowband terminal from the narrowband frequency domain resources, and the number of target subcarriers is one or more;

[0324] Allocating subcarrier resources to the target narrowband terminal according to the access feedback information.

[0325] In one embodiment, when the computer program is executed by a processor, the following steps are specifically implemented:

[0326] Detecting whether the target subcarrier is currently occupied;

[0327] If the target subcarrier is not occupied, allocating the target subcarrier to the target narrowband terminal and updating the broadcast frame to update the currently available narrowband frequency domain resources.

[0328] In one embodiment, after allocating the target subcarrier to the target narrowband terminal, when the computer program is executed by a processor, the following steps are further implemented:

[0329] Receiving the uplink time-domain signals sent by each narrowband terminal in units of radio frames, where each radio frame corresponds to multiple subcarriers, each subcarrier includes the target subcarrier, each narrowband terminal includes the target narrowband terminal, and each uplink time-domain signal has the same CP length;

[0330] Performing joint demodulation processing on each uplink time-domain signal to obtain the uplink narrowband data corresponding to each uplink time-domain signal.

[0331] In one embodiment, when the computer program is executed by a processor, the following steps are specifically implemented:

[0332] Performing CP removal processing and FFT processing on each uplink time-domain signal to determine each subcarrier;

[0333] For each subcarrier, performing down-conversion processing and filtering processing on the subcarrier to obtain single-carrier data, and performing baseband demodulation processing on the single-carrier data to obtain the uplink narrowband data.

[0334] In one embodiment, when the number of target subcarriers is multiple, the access feedback information further includes the correspondence between the target narrowband terminal and each target subcarrier. After performing joint demodulation processing on each uplink time-domain signal, when the computer program is executed by the processor, the following steps are further implemented:

[0335] Pool the uplink narrowband data corresponding to each target subcarrier to obtain a link layer data packet.

[0336] In one embodiment, the uplink narrowband data includes uplink data pilots and uplink narrowband service data;

[0337] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0338] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by the processor, the following steps are implemented:

[0339] Receive the downlink time-domain signal broadcast by the management station in the industrial wireless network;

[0340] Among them, the downlink time-domain signal is obtained by the management station mapping the downlink narrowband data into the first frequency-domain data using the first resource mapping method, mapping the downlink broadband data into the second frequency-domain data using the second resource mapping method, and the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0341] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0342] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0343] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0344] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0345] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes downlink data pilots and downlink narrowband service data;

[0346] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0347] In one embodiment, when the downlink narrowband data includes a downlink data frame, the computer program further implements the following steps when executed by a processor:

[0348] Demodulate all the received downlink time-domain signals in the current wireless frame respectively to obtain the downlink narrowband data corresponding to each downlink time-domain signal.

[0349] In one embodiment, when the downlink narrowband data includes a broadcast frame, the computer program further implements the following steps when executed by a processor:

[0350] Use the locally generated access pilot to perform blind detection on the downlink time-domain signals broadcast by each management station. During the blind detection process, if successful synchronization is achieved with the access pilot included in the broadcast frame, parse the system broadcast information from the broadcast frame, and select one or more target subcarriers from the narrowband frequency-domain resources indicated by the system broadcast information;

[0351] Send access feedback information to the management station based on the selected target subcarriers;

[0352] Among them, the access feedback information is used to indicate the target subcarriers selected by the narrowband terminal from the narrowband frequency-domain resources.

[0353] In one embodiment, after sending the access feedback information to the management station based on the selected target subcarriers, the computer program further implements the following steps when executed by a processor:

[0354] Obtain the updated broadcast frame sent by the management station;

[0355] Determine the target subcarriers allocated by the management station for the narrowband terminal according to the updated broadcast frame.

[0356] In one embodiment, the computer program further implements the following steps when executed by a processor:

[0357] Send an uplink time-domain signal to the management station in units of wireless frames on the target subcarriers;

[0358] Among them, the uplink time-domain signal is used for the management station to perform joint demodulation processing on the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals received on the wireless frame to obtain the uplink narrowband data corresponding to each uplink time-domain signal; the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals have the same CP length.

[0359] In one embodiment, the uplink narrowband data includes an uplink data pilot and uplink narrowband service data;

[0360] Among them, the uplink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0361] In one embodiment, a computer program product is provided, including a computer program, which when executed by a processor implements the following steps:

[0362] Map the downlink narrowband data into first frequency-domain data by using a first resource mapping method, and map the downlink broadband data into second frequency-domain data by using a second resource mapping method, where the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method;

[0363] Obtain a downlink time-domain signal according to the first frequency-domain data and the second frequency-domain data;

[0364] Broadcast the downlink time-domain signal to narrowband terminals and broadband terminals within the coverage range of the management station.

[0365] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0366] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0367] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0368] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0369] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data;

[0370] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0371] In one embodiment, when the computer program is executed by a processor, it specifically implements the following steps:

[0372] After combining the downlink data pilot and the downlink narrowband service data in the time domain, map them onto one or more available subcarriers in the narrowband frequency band supported by the management station.

[0373] In one embodiment, when there are multiple available subcarriers, guard subcarriers are configured between adjacent subcarriers in each subcarrier.

[0374] In one embodiment, when the downlink narrowband data includes a broadcast frame, the computer program, when executed by a processor, further implements the following steps:

[0375] Receiving access feedback information sent by a target narrowband terminal, where the access feedback information is sent by the target narrowband terminal after receiving the broadcast frame, and the access feedback information is used to indicate the target subcarriers selected by the target narrowband terminal from the narrowband frequency domain resources, and the number of target subcarriers is one or more;

[0376] Allocating subcarrier resources to the target narrowband terminal according to the access feedback information.

[0377] In one embodiment, when the computer program is executed by a processor, the following steps are specifically implemented:

[0378] Detecting whether the target subcarrier is currently occupied;

[0379] If the target subcarrier is not occupied, allocating the target subcarrier to the target narrowband terminal and updating the broadcast frame to update the currently available narrowband frequency domain resources.

[0380] In one embodiment, after allocating the target subcarrier to the target narrowband terminal, the computer program, when executed by a processor, further implements the following steps:

[0381] Receiving uplink time-domain signals sent by each narrowband terminal in units of radio frames, where the radio frame corresponds to multiple subcarriers, each subcarrier includes the target subcarrier, each narrowband terminal includes the target narrowband terminal, and each uplink time-domain signal has the same CP length;

[0382] Performing joint demodulation processing on each uplink time-domain signal to obtain uplink narrowband data corresponding to each uplink time-domain signal.

[0383] In one embodiment, when the computer program is executed by a processor, the following steps are specifically implemented:

[0384] Performing CP removal processing and FFT processing on each uplink time-domain signal to determine each subcarrier;

[0385] For each subcarrier, performing down-conversion processing and filtering processing on the subcarrier to obtain single-carrier data, and performing baseband demodulation processing on the single-carrier data to obtain uplink narrowband data.

[0386] In one embodiment, when the number of target subcarriers is multiple, the access feedback information further includes the correspondence between the target narrowband terminal and each target subcarrier. After jointly demodulating each uplink time-domain signal, when the computer program is executed by a processor, the following steps are further implemented:

[0387] Pool the uplink narrowband data corresponding to each target subcarrier to obtain a link layer data packet.

[0388] In one embodiment, the uplink narrowband data includes uplink data pilots and uplink narrowband service data;

[0389] Among them, the uplink data pilots are determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0390] In one embodiment, a computer program product is provided, including a computer program, which when executed by a processor implements the following steps:

[0391] Receive the downlink time-domain signal broadcast by the management station in the industrial wireless network;

[0392] Among them, the downlink time-domain signal is obtained by the management station mapping the downlink narrowband data into the first frequency-domain data using the first resource mapping method and mapping the downlink broadband data into the second frequency-domain data using the second resource mapping method, and the frequency-domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency-domain resource scheduling unit corresponding to the second resource mapping method.

[0393] In one embodiment, the first resource mapping method uses a subcarrier as the frequency-domain resource scheduling unit, and the second resource mapping method uses a resource block as the frequency-domain resource scheduling unit.

[0394] In one embodiment, the downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information;

[0395] Among them, the access pilot is determined according to the identity identifier of the management station; the system broadcast information includes the center frequency point of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency-domain resources in the narrowband frequency band.

[0396] In one embodiment, the resource indication information includes a bitmap, and each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band. When any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is a narrowband frequency-domain resource.

[0397] In one embodiment, the downlink narrowband data includes a downlink data frame, and the downlink data frame includes downlink data pilots and downlink narrowband service data;

[0398] Among them, the downlink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the downlink narrowband service data.

[0399] In one embodiment, when the downlink narrowband data includes a downlink data frame, the computer program further implements the following steps when executed by a processor:

[0400] Demodulate all the received downlink time-domain signals in the current radio frame respectively to obtain the downlink narrowband data corresponding to each downlink time-domain signal.

[0401] In one embodiment, when the downlink narrowband data includes a broadcast frame, the computer program further implements the following steps when executed by a processor:

[0402] Blindly detect the downlink time-domain signals broadcast by each management station by using the locally generated access pilot. During the blind detection process, if successful synchronization is achieved with the access pilot included in the broadcast frame, parse the system broadcast information from the broadcast frame, and select one or more target subcarriers from the narrowband frequency-domain resources indicated by the system broadcast information;

[0403] Send access feedback information to the management station based on the selected target subcarriers;

[0404] Among them, the access feedback information is used to indicate the target subcarriers selected by the narrowband terminal from the narrowband frequency-domain resources.

[0405] In one embodiment, after sending the access feedback information to the management station based on the selected target subcarriers, the computer program further implements the following steps when executed by a processor:

[0406] Obtain the updated broadcast frame sent by the management station;

[0407] Determine the target subcarriers allocated by the management station for the narrowband terminal according to the updated broadcast frame.

[0408] In one embodiment, the computer program further implements the following steps when executed by a processor:

[0409] Send an uplink time-domain signal to the management station in units of radio frames on the target subcarriers;

[0410] Among them, the uplink time-domain signal is used for the management station to perform joint demodulation processing on the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals received on the radio frame to obtain the uplink narrowband data corresponding to each uplink time-domain signal; the uplink time-domain signal and the uplink time-domain signals sent by other narrowband terminals have the same CP length.

[0411] In one embodiment, the uplink narrowband data includes an uplink data pilot and uplink narrowband service data;

[0412] Among them, the uplink data pilot is determined according to the identity identifier of the management station and the identity identifier of the narrowband terminal corresponding to the uplink narrowband service data.

[0413] Those of ordinary skill in the art can understand that all or part of the processes in the methods of the above embodiments can be completed by instructing relevant hardware through a computer program. The computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above methods. Among them, any reference to a memory, database, or other medium used in the embodiments provided in this application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc. The databases involved in the embodiments provided in this application can include at least one of relational databases and non-relational databases. Non-relational databases can include distributed databases based on blockchain, etc., and are not limited thereto. The processors involved in the embodiments provided in this application can be general-purpose processors, central processors, graphics processors, digital signal processors, programmable logic devices, data processing logics based on quantum computing, artificial intelligence (AI) processors, etc., and are not limited thereto.

[0414] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this application.

[0415] The above embodiments merely represent several implementation manners of the present application. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all fall within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A communication method for an industrial wireless network, characterized in that: For use in a management station in an industrial wireless network, the method comprises: A first resource mapping method is used to map downlink narrowband data into first frequency domain data, and a second resource mapping method is used to map downlink broadband data into second frequency domain data, wherein a frequency domain resource scheduling unit corresponding to the first resource mapping method is smaller than a frequency domain resource scheduling unit corresponding to the second resource mapping method; Obtain a downlink time domain signal according to the first frequency domain data and the second frequency domain data; The downlink time domain signal is broadcast to narrowband terminals and broadband terminals within the coverage of the management station.

2. The method according to claim 1, characterized in that The first resource mapping method uses subcarriers as frequency domain resource scheduling units, and the second resource mapping method uses resource blocks as frequency domain resource scheduling units.

3. The method according to claim 2, characterized in that The downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information; The access pilot is determined according to the identity of the management station; the system broadcast information includes the central frequency of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency domain resources in the narrowband frequency band.

4. The method according to claim 3, characterized in that The resource indication information includes a bitmap, each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band, and when any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is the narrowband frequency domain resource.

5. The method according to claim 2, characterized in that: The downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data; The downlink data pilot is determined according to the identity of the management station and the identity of the narrowband terminal corresponding to the downlink narrowband service data.

6. The method according to claim 5, characterized in that The adopting a first resource mapping mode to map the downlink narrowband data to first frequency domain data includes: The downlink data pilot and the downlink narrowband service data are mapped onto one or more available subcarriers in the narrowband frequency band supported by the management station after being combined in the time domain.

7. The method according to claim 6, characterized in that In the case where there are multiple available subcarriers, a guard subcarrier is configured between adjacent subcarriers in each of the subcarriers.

8. The method according to claim 3 or 4, characterized in that: In the case where the downlink narrowband data includes the broadcast frame, the method further includes: receiving access feedback information sent by a target narrowband terminal, where the access feedback information is sent by the target narrowband terminal after receiving the broadcast frame, and the access feedback information is used to indicate a target subcarrier selected by the target narrowband terminal from the narrowband frequency domain resources, where the number of the target subcarriers is one or more; Subcarrier resources are allocated to the target narrowband terminal according to the access feedback information.

9. The method according to claim 8, characterized in that The allocating subcarrier resources to the target narrowband terminal according to the access feedback information includes: Detecting whether the target subcarrier is currently occupied; If the target subcarrier is not occupied, the target subcarrier is allocated to the target narrowband terminal, and the broadcast frame is updated to update the currently available narrowband frequency domain resources.

10. The method according to claim 9, characterized in that After allocating the target subcarrier to the target narrowband terminal, the method further includes: Receiving an uplink time domain signal sent by each narrowband terminal in units of a radio frame, wherein the radio frame corresponds to a plurality of subcarriers, each of the subcarriers includes the target subcarrier, each of the narrowband terminals includes the target narrowband terminal, and each of the uplink time domain signals has the same CP length; Joint demodulation processing is performed on each of the uplink time domain signals to obtain uplink narrowband data corresponding to each of the uplink time domain signals.

11. The method according to claim 10, characterized in that The performing joint demodulation processing on each of the uplink time domain signals to obtain uplink narrowband data corresponding to each of the uplink time domain signals includes: Performing CP removal and FFT processing on each of the uplink time domain signals to determine each of the subcarriers; For each of the subcarriers, down-conversion processing and filtering processing are performed on the subcarrier to obtain single-carrier data, and baseband demodulation processing is performed on the single-carrier data to obtain the uplink narrowband data.

12. The method according to claim 10, characterized in that In the case where the number of the target subcarriers is multiple, the access feedback information further includes a correspondence between the target narrowband terminal and each of the target subcarriers, and after the joint demodulation processing is performed on each of the uplink time domain signals, the method further includes: The uplink narrowband data corresponding to each of the target subcarriers are aggregated and processed to obtain a link layer data packet.

13. The method according to claim 10, characterized in that The uplink narrowband data includes uplink data pilot and uplink narrowband service data; The uplink data pilot is determined according to the identity of the management station and the identity of the narrowband terminal corresponding to the uplink narrowband service data.

14. A communication method for an industrial wireless network, characterized in that: For use in a narrowband terminal in an industrial wireless network, the method comprises: Receiving a downlink time domain signal broadcasted by a management station in the industrial wireless network; Among them, the downlink time domain signal is obtained by the management station using a first resource mapping method to map downlink narrowband data into first frequency domain data, and using a second resource mapping method to map downlink broadband data into second frequency domain data, and based on the first frequency domain data and the second frequency domain data. The frequency domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency domain resource scheduling unit corresponding to the second resource mapping method.

15. The method according to claim 14, characterized in that The first resource mapping method uses subcarriers as frequency domain resource scheduling units, and the second resource mapping method uses resource blocks as frequency domain resource scheduling units.

16. The method according to claim 15, characterized in that The downlink narrowband data includes a broadcast frame, and the broadcast frame includes an access pilot and system broadcast information; The access pilot is determined according to the identity of the management station; the system broadcast information includes the central frequency of the narrowband frequency band supported by the management station and resource indication information, and the resource indication information is used to indicate the narrowband frequency domain resources in the narrowband frequency band.

17. The method according to claim 16, characterized in that The resource indication information includes a bitmap, each bit in the bitmap corresponds to each subcarrier in the narrowband frequency band, and when any bit is set to a preset value, the bit is used to indicate that the subcarrier corresponding to the bit is the narrowband frequency domain resource.

18. The method according to claim 15, characterized in that The downlink narrowband data includes a downlink data frame, and the downlink data frame includes a downlink data pilot and downlink narrowband service data; The downlink data pilot is determined according to the identity of the management station and the identity of the narrowband terminal corresponding to the downlink narrowband service data.

19. The method according to claim 18, characterized in that In the case where the downlink narrowband data includes the downlink data frame, the method further includes: All downlink time domain signals received in the current wireless frame are demodulated respectively to obtain downlink narrowband data corresponding to each of the downlink time domain signals.

20. The method according to claim 16 or 17, characterized in that In the case where the downlink narrowband data includes the broadcast frame, the method further includes: Using the locally generated access pilot, blind detection is performed on the downlink time domain signal broadcast by each management station. During the blind detection process, if synchronization with the access pilot included in the broadcast frame is successful, the system broadcast information is parsed from the broadcast frame, and one or more target subcarriers are selected from the narrowband frequency domain resources indicated by the system broadcast information; Sending access feedback information to the management station based on the selected target subcarrier; The access feedback information is used to indicate the target subcarrier selected by the narrowband terminal from the narrowband frequency domain resources.

21. The method according to claim 20, characterized in that After sending access feedback information to the management station based on the selected target subcarrier, the method further includes: Obtaining an updated broadcast frame sent by the management station; The management station determines, according to the updated broadcast frame, to allocate the target subcarrier to the narrowband terminal.

22. The method according to claim 21, characterized in that The method further comprises: Sending an uplink time domain signal to the management station in units of radio frames on the target subcarrier; Among them, the uplink time domain signal is used by the management station to jointly demodulate the uplink time domain signal and the uplink time domain signals sent by other narrowband terminals received on the wireless frame to obtain uplink narrowband data corresponding to each of the uplink time domain signals; the uplink time domain signal and the uplink time domain signals sent by the other narrowband terminals have the same CP length.

23. The method according to claim 22, characterized in that The uplink narrowband data includes uplink data pilot and uplink narrowband service data; The uplink data pilot is determined according to the identity of the management station and the identity of the narrowband terminal corresponding to the uplink narrowband service data.

24. A communication device for an industrial wireless network, characterized in that: Used as a management station in an industrial wireless network, the device comprises: A mapping module, configured to map downlink narrowband data to first frequency domain data using a first resource mapping method, and map downlink broadband data to second frequency domain data using a second resource mapping method, wherein a frequency domain resource scheduling unit corresponding to the first resource mapping method is smaller than a frequency domain resource scheduling unit corresponding to the second resource mapping method; An acquisition module, configured to obtain a downlink time domain signal according to the first frequency domain data and the second frequency domain data; The broadcast module is used to broadcast the downlink time domain signal to narrowband terminals and broadband terminals within the coverage of the management station.

25. A communication device for an industrial wireless network, characterized in that: A narrowband terminal for an industrial wireless network, the device comprising: A receiving module, used for receiving a downlink time domain signal broadcasted by a management station in the industrial wireless network; Among them, the downlink time domain signal is obtained by the management station using a first resource mapping method to map downlink narrowband data into first frequency domain data, and using a second resource mapping method to map downlink broadband data into second frequency domain data, and based on the first frequency domain data and the second frequency domain data. The frequency domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency domain resource scheduling unit corresponding to the second resource mapping method.

26. A wireless device, characterized in that: Including memory, transceiver, processor: The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: A first resource mapping method is used to map downlink narrowband data into first frequency domain data, and a second resource mapping method is used to map downlink broadband data into second frequency domain data, wherein a frequency domain resource scheduling unit corresponding to the first resource mapping method is smaller than a frequency domain resource scheduling unit corresponding to the second resource mapping method; Obtain a downlink time domain signal according to the first frequency domain data and the second frequency domain data; The transceiver is controlled to broadcast the downlink time domain signal to narrowband terminals and broadband terminals within the coverage of the management station.

27. A wireless device, characterized in that: Including memory, transceiver, processor: The memory is used to store a computer program; the transceiver is used to send and receive data under the control of the processor; the processor is used to read the computer program in the memory and perform the following operations: Controlling the transceiver to receive a downlink time domain signal broadcast by a management station in an industrial wireless network; Among them, the downlink time domain signal is obtained by the management station using a first resource mapping method to map downlink narrowband data into first frequency domain data, and using a second resource mapping method to map downlink broadband data into second frequency domain data, and based on the first frequency domain data and the second frequency domain data. The frequency domain resource scheduling unit corresponding to the first resource mapping method is smaller than the frequency domain resource scheduling unit corresponding to the second resource mapping method.

28. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 23 are implemented.

29. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 23 are implemented.

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