Communication method, device and equipment based on discrete narrowband frequency resources

Abstract

The present invention discloses a communication method, apparatus, device and storage medium based on discrete narrowband frequency resources. In the present invention, after the base station allocates resource blocks to each mobile terminal according to the signal processing capability, it sends scheduling configuration information to each mobile terminal to inform the mobile terminal of the resource blocks and target subcarrier intervals to be called. After that, the base station and the mobile terminal can query the resource mapping relationship according to the resource blocks and the target subcarrier intervals to determine the subcarrier set corresponding to the mobile terminal. The base station can then communicate with the mobile terminal according to the subcarrier set corresponding to each mobile terminal. The present invention can improve the utilization rate of narrowband frequency resources by pre-setting the subcarrier set corresponding to each resource block and subcarrier interval in the resource mapping relationship, and the base station and the mobile terminal determine the subcarrier set during communication by querying the resource mapping relationship, thereby improving the efficiency and reliability of information transmission.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of communications, and in particular to a communication method, apparatus, device and storage medium based on discrete narrowband frequency resources. Background Art

[0002] At present, in order to meet the communication needs of different industries, the communication industry has pre-allocated dedicated network working frequency bands for industries such as electricity, gas, civil air defense and water services. Dedicated network working frequency bands refer to the radio frequency ranges specially allocated to specific industries or professional users to ensure that radio communications between different industries do not interfere with each other. The working frequency bands of dedicated networks can vary depending on different industries and application scenarios.

[0003] However, the 4G and 5G communication technologies in the prior art generally use continuous bandwidth frequency resources with a large frequency band range during the communication process. Since the private network working frequency band is a number of scattered and discrete narrowband frequency resources with a 25kHz sub-band bandwidth, the subcarrier spacing used in the communication process of 4G and 5G communication technologies cannot divide the sub-band bandwidth of the private network working frequency band, that is, the subcarrier orthogonality between sub-bands cannot be guaranteed. In this case, the harmonic interference of subcarriers between adjacent or similar sub-bands will increase. In order to reduce this interference, it is necessary to increase the protection band or reduce the density of subcarriers, which will directly lead to a reduction in the utilization rate of spectrum resources, resulting in a reduction in efficiency and reliability during information transmission. Summary of the invention

[0004] The embodiments of the present invention provide a communication method, apparatus, device and storage medium based on discrete narrowband frequency resources. The embodiments of the present invention can make full use of sub-band frequency resources, improve the efficiency and reliability of information transmission, and solve the technical problem in the prior art that when using narrowband frequency resources for communication, the frequency resources cannot be fully utilized, resulting in low information transmission efficiency and poor reliability.

[0005] In a first aspect, an embodiment of the present invention provides a communication method based on discrete narrowband frequency resources, applicable to a base station, including:

[0006] After the mobile terminal accesses the network, determining the signal processing capability of each mobile terminal, where the signal processing capability is the capability of the mobile terminal to receive or transmit discrete frequency domain signals;

[0007] Determining the resource blocks called by each of the mobile terminals and the corresponding target subcarrier spacing according to the current network environment, communication service requirements and the signal processing capability;

[0008] Determine a subcarrier set called by each of the mobile terminals according to the resource block, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subcarrier set corresponding to each resource block under different subcarrier spacings;

[0009] Generate scheduling configuration information corresponding to each of the mobile terminals according to the resource blocks called by each of the mobile terminals and the target subcarrier spacing;

[0010] Sending corresponding scheduling configuration information to each of the mobile terminals, so that each of the mobile terminals determines the called subcarrier set by querying the resource mapping relationship;

[0011] Communicating with each of the mobile terminals according to a subcarrier set corresponding to each of the mobile terminals.

[0012] The resource mapping relationship includes a subband corresponding to each resource block and a subcarrier set corresponding to each subband under different subcarrier spacings. A subcarriers, where is a preset value corresponding to the subcarrier spacing, and the value of A is 20.

[0013] The frequency intervals of two adjacent sub-bands are all integer multiples of the sub-carrier interval, and the sub-carrier interval is any one of 1.25 kHz, 2.5 kHz and 5 kHz.

[0014] The frequency of the first subcarrier corresponding to each resource block is The method of determining is:

[0015]

[0016] in, the sequence number of the subband, is the number of subcarriers included in the subband, is the number of subcarriers included in the resource block.

[0017] Among them, the scheduling configuration information includes a first resource block called by an uplink shared channel of the mobile terminal or a second resource block called by a downlink shared channel, the subcarrier set corresponding to the first resource block is used for calling during uplink communication, and the subcarrier set corresponding to the second resource block is used for calling during downlink communication.

[0018] The communicating with each of the mobile terminals according to the subcarrier set corresponding to each of the mobile terminals includes:

[0019] determining communication data corresponding to each of the mobile terminals;

[0020] Writing the communication data corresponding to each of the mobile terminals into the subcarrier set corresponding to the mobile terminal, and clearing the data of the subcarrier set outside the resource mapping relationship;

[0021] An OFDM symbol is generated according to the subcarrier set in which the communication data is written and the subcarrier set in which the data is cleared, and a time slot signal composed of the OFDM symbol is sent to the mobile terminal.

[0022] In a second aspect, an embodiment of the present invention provides a communication method based on discrete narrowband frequency resources, applicable to a mobile terminal, including:

[0023] Receiving scheduling configuration information sent by a base station, wherein the scheduling configuration information includes a resource block called by the mobile terminal and a corresponding target subcarrier spacing;

[0024] Determine a resource block and a corresponding target subcarrier spacing in the scheduling configuration information, and determine a corresponding subcarrier set according to the resource block, the target subcarrier spacing, and a preset resource mapping relationship, wherein the resource mapping relationship includes a subcarrier set corresponding to each resource block under different subcarrier spacings;

[0025] Communicate with the base station according to the corresponding subcarrier set.

[0026] The communicating with the base station according to the corresponding subcarrier set includes:

[0027] Receiving a time slot signal, and extracting an OFDM symbol in the time slot signal, wherein the time slot signal is composed of a plurality of the OFDM symbols;

[0028] Parse a first subcarrier set in the OFDM symbol, determine a target subcarrier set in the first subcarrier set according to the corresponding subcarrier set, extract communication data from the target subcarrier set, and write the communication data into the target subcarrier set by the base station.

[0029] In a third aspect, an embodiment of the present invention provides a communication device based on discrete narrowband frequency resources, applicable to a base station, including:

[0030] An information determination module, used to determine the signal processing capability of each mobile terminal after the mobile terminal joins the network, wherein the signal processing capability is the capability of the mobile terminal to receive or transmit discrete frequency domain signals;

[0031] A resource block determination module, used to determine the resource block called by each of the mobile terminals and the corresponding target subcarrier spacing according to the current network environment, communication service requirements and the signal processing capability;

[0032] A first subcarrier determination module, configured to determine a subcarrier set called by each of the mobile terminals according to the resource block, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subcarrier set corresponding to each resource block under different subcarrier spacings;

[0033] An information generating module, configured to generate scheduling configuration information corresponding to each of the mobile terminals according to the resource blocks called by each of the mobile terminals and the target subcarrier spacing;

[0034] An information sending module, used for sending corresponding scheduling configuration information to each of the mobile terminals, so that each of the mobile terminals determines the called subcarrier set by querying the resource mapping relationship;

[0035] The first communication module is used to communicate with each of the mobile terminals according to a subcarrier set corresponding to each of the mobile terminals.

[0036] In a fourth aspect, an embodiment of the present invention provides a communication device based on discrete narrowband frequency resources, applicable to a mobile terminal, including:

[0037] An information receiving module, configured to receive scheduling configuration information sent by a base station, wherein the scheduling configuration information includes a resource block called by the mobile terminal and a corresponding target subcarrier spacing;

[0038] A second subcarrier determination module is used to determine the resource block and the corresponding target subcarrier spacing in the scheduling configuration information, and determine the corresponding subcarrier set according to the resource block, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subcarrier set corresponding to each resource block under different subcarrier spacings;

[0039] The second communication module is used to communicate with the base station according to the corresponding subcarrier set.

[0040] In a fifth aspect, an embodiment of the present invention provides a communication device based on discrete narrowband frequency resources, wherein the communication device based on discrete narrowband frequency resources includes a processor and a memory;

[0041] The memory is used to store a computer program and transmit the computer program to the processor;

[0042] The processor is configured to execute the communication method based on discrete narrowband frequency resources as described in the first aspect and the second aspect according to the instructions in the computer program.

[0043] In a sixth aspect, an embodiment of the present invention provides a storage medium storing computer executable instructions, which, when executed by a computer processor, are used to execute the communication method based on discrete narrowband frequency resources as described in the first aspect and the second aspect.

[0044] As described above, the embodiments of the present invention provide a communication method, apparatus, device and storage medium based on discrete narrowband frequency resources. In the embodiments of the present invention, a resource mapping relationship is jointly maintained in a base station and a mobile terminal. After the base station allocates a resource block to each mobile terminal according to the signal processing capability, the base station sends scheduling configuration information to each mobile terminal to inform the mobile terminal of the resource block and the target subcarrier spacing called. After that, the base station and the mobile terminal can query the resource mapping relationship according to the resource block and the target subcarrier spacing to determine the subcarrier set corresponding to the mobile terminal. Subsequently, the base station can communicate with the mobile terminal according to the subcarrier set corresponding to each mobile terminal. In the embodiments of the present invention, by pre-setting the subcarrier set corresponding to each resource block and the subcarrier spacing in the resource mapping relationship, the base station and the mobile terminal determine the subcarrier set during communication by querying the resource mapping relationship, which can improve the utilization rate of narrowband frequency resources, thereby improving the efficiency and reliability of information transmission, and solving the technical problem that when using narrowband frequency resources for communication in the prior art, the frequency resources cannot be fully utilized, resulting in low information transmission efficiency and poor reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Schematic diagram of subcarrier spacing in the prior art.

[0046] Figure 2 A schematic flow chart of a communication method based on discrete narrowband frequency resources provided by an embodiment of the present invention.

[0047] Figure 3 A schematic diagram of a subcarrier spacing provided in an embodiment of the present invention.

[0048] Figure 4 A schematic diagram of an OFDM resource grid provided by an embodiment of the present invention.

[0049] Figure 5 A schematic flow chart of another communication method based on discrete narrowband frequency resources provided by an embodiment of the present invention.

[0050] Figure 6 A schematic structural diagram of a communication device based on discrete narrowband frequency resources provided by an embodiment of the present invention.

[0051] Figure 7 A schematic structural diagram of another communication device based on discrete narrowband frequency resources provided by an embodiment of the present invention.

[0052] Figure 8 A schematic structural diagram of a communication device based on discrete narrowband frequency resources provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0053] The following description and accompanying drawings fully illustrate the specific embodiments of the present application so that those skilled in the art can practice them. The examples represent possible variations only. Unless explicitly required, separate components and functions are optional, and the order of operation can vary. The parts and features of some embodiments may be included in or replace the parts and features of other embodiments. The scope of the embodiments of the present application includes the entire scope of the claims, and all available equivalents of the claims. In this article, each embodiment may be represented individually or generally by the term "invention", which is only for convenience, and if more than one invention is disclosed in fact, it is not intended to automatically limit the scope of the application to any single invention or inventive concept. In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, without requiring or implying any actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method or device including a series of elements includes not only those elements, but also other elements that are not explicitly listed. The various embodiments are described in a progressive manner herein, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. As for the structures, products, etc. disclosed in the embodiments, since they correspond to the parts disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the method part.

[0054] At present, the communication industry has allocated a dedicated network operating frequency band for industries such as electricity, gas, civil air defense and water, which is the 223~235MHz band, referred to as the 230MHz band. The characteristic of this band is that it is composed of a number of sporadic and discrete narrowband frequency resources. In the bandwidth range of the 223~235MHz band, the bandwidth of each frequency sub-band is 25kHz, and a total of 480 sub-bands are included. The available frequency resources are shown in Table 1.

[0055] Table 1

[0056]

[0057] Since the existing 4G and 5G communication standards are generally applicable to continuous and large bandwidth resources, but not to sporadic and discrete narrowband frequency resources, it is necessary to set technical specifications corresponding to the working frequency band of the private network. At present, the technical routes for the 230MHz frequency band include LTE-G230 technical specifications and IoT-G230 technical specifications. Among them, LTE-G230MHz technology is derived from the standard TD-LTE technology and supports broadband and narrowband integrated services; IoT-G230MHz technology is derived from NB-IoT technology and supports narrowband Internet of Things technology. LTE-G230 technology uses OFDM signals with a subcarrier spacing of 2kHz, while IoT-G230 technology uses OFDM signals with a subcarrier spacing of 3.75kHz.

[0058] However, whether the subcarrier spacing is 2kHz or 3.75kHz, the subband bandwidth of 230MHz cannot be divided evenly into 25kHz, resulting in the frequency difference between subcarriers in adjacent or close subbands not being able to maintain an integer multiple of the subcarrier spacing, thereby destroying the orthogonality between OFDM subcarriers. For example, Figure 1 As shown, Figure 1 is a schematic diagram of subcarrier spacing in the prior art, Figure 1 When the subcarrier frequency interval within a subband is 2kHz, the subcarrier frequency interval between subbands is 3kHz; when the subcarrier frequency interval within a subband is 3.75kHz, the subcarrier frequency interval between subbands is 6.25kHz. When the subcarrier frequency interval between subbands and the subcarrier frequency interval within a subband cannot maintain an integer multiple relationship, it will affect the subcarrier orthogonality between subbands. If the subcarrier orthogonality between subbands cannot be guaranteed, the harmonic interference of subcarriers between adjacent or adjacent subbands will increase, thereby affecting the signal quality and thus the signal reception quality. In order to reduce this interference, it is necessary to increase the guard band or reduce the density of subcarriers, which will directly lead to a reduction in spectrum efficiency, resulting in a reduction in efficiency and reliability during information transmission.

[0059] In summary, in the prior art, when using narrowband frequency resources for communication, there is a technical problem that the frequency resources cannot be fully utilized, resulting in low information transmission efficiency and poor reliability.

[0060] In order to solve the above technical problems, an embodiment of the present invention provides a communication method based on discrete narrowband frequency resources, such as Figure 2 As shown, Figure 2 A flow chart of a communication method based on discrete narrowband frequency resources provided by an embodiment of the present invention is provided. The communication method based on discrete narrowband frequency resources provided by an embodiment of the present invention is applicable to a base station, including:

[0061] Step 101: After a mobile terminal accesses the network, the signal processing capability of each mobile terminal is determined. The signal processing capability is the capability of the mobile terminal to receive or transmit discrete frequency domain signals.

[0062] In this embodiment, when a mobile terminal located within the signal coverage of the base station accesses the wireless network established by the base station, the base station needs to determine the signal processing capability of each mobile terminal, wherein the signal processing capability is the capability of the mobile terminal to receive or transmit discrete frequency domain signals, and according to the signal processing capability of the mobile terminal, it can be determined whether the frequency resource that the mobile terminal can schedule is a single resource block or a collection of multiple resource blocks. By determining the signal processing capability of each mobile terminal, the base station can subsequently determine whether one resource block or multiple resource blocks can be scheduled for a specific mobile terminal.

[0063] Step 102: Determine the resource blocks used by each mobile terminal and the corresponding target subcarrier spacing according to the current network environment, communication service requirements and signal processing capabilities.

[0064] After determining the signal processing capability of the mobile terminal, the base station needs to determine the resource block (RB) called by each mobile terminal and the target subcarrier spacing corresponding to each mobile terminal, where the resource block is the basic unit for resource scheduling and allocation in the wireless communication system. It enables the system to flexibly manage and allocate wireless resources to different users and services through division in the frequency domain and time domain. Specifically, the base station first needs to analyze the current network environment (such as frequency band, coverage, multipath propagation, etc.) and communication service requirements (such as URLLC, eMBB, etc.) to determine the candidate subcarrier spacing. Exemplarily, when the base station determines that the frequency band of the current network is a private network working frequency band, the candidate subcarrier spacing needs to be able to divide the subband bandwidth 25kHz, for example, the candidate subcarrier spacing can be 2.5kHz or 5kHz, etc. Afterwards, the base station needs to determine the target subcarrier spacing when communicating with each mobile terminal based on factors such as the candidate subcarrier spacing and the subcarrier spacing supported by the mobile terminal. Finally, the base station needs to allocate resource blocks to each mobile terminal for communication based on the target subcarrier spacing when communicating with each mobile terminal and the signal processing capability of each mobile terminal. It should be noted that the resource blocks allocated to each mobile terminal include resource blocks that can be called by the mobile terminal downlink shared channel PDSCH and resource blocks that can be called by the physical uplink shared channel PUSCH.

[0065] Step 103: Determine the subcarrier set called by each mobile terminal according to the resource block, the target subcarrier spacing and the preset resource mapping relationship, wherein the resource mapping relationship includes the subcarrier set corresponding to each resource block at different subcarrier spacings.

[0066] After determining the resource blocks that each mobile terminal can call and the corresponding target subcarrier spacing, the base station needs to further determine the subcarrier set called by each mobile terminal based on the preset resource mapping relationship, where the resource mapping relationship includes the subcarrier set corresponding to each resource block at different subcarrier spacings. The resource mapping relationship needs to be set by the user in advance and saved in the base station and mobile terminal. After the base station determines the target subcarrier spacing when communicating with each mobile terminal and the resource blocks called by each mobile terminal, it can determine the corresponding subcarrier set based on the resource mapping relationship.

[0067] Based on the above embodiment, the resource mapping relationship includes a subband corresponding to each resource block under different subcarrier spacings, and a subcarrier set corresponding to each subband, and each subband corresponds to A subcarriers, where is a preset value corresponding to the subcarrier spacing, and the value of A is 20.

[0068] In this embodiment, the user needs to set in advance in the resource mapping relationship a subband corresponding to each resource block and a subcarrier set corresponding to each subband under different subcarrier spacings, where different subbands can be distinguished by assigning serial numbers to the subbands. For example, it is necessary to set a subband corresponding to each resource block and a subcarrier set corresponding to each subband under a subcarrier spacing of 5kHz. It can be understood that different subbands correspond to different subcarrier sets. In addition, in this embodiment, each subband corresponds to A subcarriers, where is a preset value corresponding to the subcarrier spacing, and the preset value needs to be set by the user in advance. In addition, the value of A is 20. When the value of A is 20, Among the 20 subcarriers, the one located at the center The subcarriers are available, and the remaining subcarriers on both sides are used as guard intervals to prevent the power leakage of the subband from affecting the adjacent subbands. It can be understood that, while ensuring the adjacent channel leakage ratio ACLR index, a resource block can also correspond to more subcarrier sets of different numbers. The configuration of more subcarrier sets is conducive to improving spectrum efficiency and data throughput.

[0069] In the private network working frequency band, the total span of the 223~235MHz frequency band is 12MHz. The total number of subcarriers included in the configuration is: Therefore, the FFT (Fast Fourier Transform) size of OFDM (Orthogonal Frequency Division Multiplexing) signals is chosen to be slightly larger than The Nth power of 2, that is .

[0070] Based on the above subcarrier configuration, we can continue to deduce and determine the OFDM frame (composed of multiple subcarrier sets). Assume that the time domain signal is As the basic unit, The length of an OFDM frame is , i.e. 40 milliseconds. An OFDM frame consists of 5 consecutive subframes, and the length of the subframe is , i.e. 8 milliseconds. One subframe consists of Continuous time slots, 1 time slot contains OFDM symbols, that is, the OFDM symbol length (excluding the cyclic prefix CP) is , the cyclic prefix CP length corresponding to each OFDM symbol is defined by Table 2.

[0071] Table 2

[0072]

[0073] After determining the OFDM frame structure, the physical resources of the physical layer can be further specified according to the OFDM frame structure. Specifically, an OFDM symbol contains Sampling point, corresponding to after time-frequency transformation Subcarrier, subcarrier and OFDM symbol are two dimensions that can determine a resource element (RE). In an OFDM symbol, A continuous RE forms a resource block (RB). Due to the discrete distribution of subband carriers, RBs are not continuous, so the subbands and subcarrier sets corresponding to each RB are also not continuous.

[0074] In one embodiment, the frequency intervals of two adjacent subbands are integer multiples of the subcarrier interval. Since the subband bandwidth of the private network working frequency band is 25kHz, the subcarrier interval in the resource mapping relationship of this embodiment can be any one of 1.25kHz, 2.5kHz and 5kHz, where 1.25kHz, 2.5kHz and 5kHz can divide the subband bandwidth 25kHz. By ensuring that the frequency intervals of two adjacent subbands are integer multiples of the subcarrier interval, the mutual orthogonality between different subbands is ensured, so as to achieve the purpose of rationally utilizing spectrum resources and ensuring reliable transmission. Figure 3 As shown, Figure 3A schematic diagram of the subcarrier spacing provided for an embodiment of the present invention, when the subcarrier spacing is 2.5kHz, the frequency spacing of adjacent subbands is 2.5kHz, and when the subcarrier spacing is 5kHz, the frequency spacing of adjacent subbands is 5kHz, thereby satisfying the mutual orthogonality between different subbands.

[0075] In addition, when When the value of is 0, the subcarrier spacing is 1.25kHz; when When the value of is 1, the subcarrier spacing is 2.5kHz; when When the value of is 2, the subcarrier spacing is 5kHz. Table 3 is a subcarrier configuration table under different subcarrier spacings.

[0076] Table 3

[0077]

[0078] in is the subcarrier spacing.

[0079] The subband and subcarrier sets corresponding to each RB in the resource mapping relationship are shown in Table 4.

[0080] Table 4

[0081]

[0082] The frequency of the first subcarrier corresponding to each resource block The method of determining is:

[0083]

[0084] in, The subband number, is the number of subcarriers included in the subband, is the number of subcarriers included in the resource block. Figure 4 As shown, for The subcarrier configuration of a subband resource SB20 (25kHz) has 20 subcarriers, and the corresponding subcarrier number of a resource block RB0 is 12.

[0085] Step 104: Generate scheduling configuration information corresponding to each mobile terminal according to the resource blocks called by each mobile terminal and the target subcarrier spacing.

[0086] After determining the resource blocks and target subcarrier spacing called by each mobile terminal, the scheduling configuration information corresponding to each mobile terminal can be generated according to the resource blocks called by each mobile terminal and the target subcarrier spacing corresponding to each mobile terminal, so as to send the scheduling configuration information to each mobile terminal in the future, thereby informing each mobile terminal of the resource blocks that can be called in the subsequent communication process. In one embodiment, the scheduling configuration information includes the first resource block called by the uplink shared channel PUSCH of the mobile terminal, or the second resource block called by the downlink shared channel PDSCH. The subcarrier set corresponding to the first resource block is used for calling in uplink communication, and the subcarrier set corresponding to the second resource block is used for calling in downlink communication. It can be understood that the base station needs to generate two scheduling configuration information corresponding to each mobile terminal, and the two scheduling configuration information respectively include the first resource block called by the uplink shared channel PUSCH and the second resource block called by the downlink shared channel PDSCH. The corresponding two scheduling configuration information need to be sent to each mobile terminal in the future, so that the subsequent mobile terminal can communicate uplink and downlink with the base station.

[0087] Step 105: Send corresponding scheduling configuration information to each mobile terminal, so that each mobile terminal determines the invoked subcarrier set by querying the resource mapping relationship.

[0088] After generating the scheduling configuration information, the base station can send the corresponding scheduling configuration information to each mobile terminal through the physical downlink control channel PDCCH or high-level signaling containing configuration authorization information. After receiving the scheduling configuration information, each mobile terminal can determine the resource blocks that can be called and the target subcarrier spacing according to the scheduling configuration information. After that, the mobile terminal can further determine the subcarrier set corresponding to the resource blocks that can be called under the target subcarrier spacing by querying the resource mapping relationship.

[0089] Step 106: Communicate with each mobile terminal according to the subcarrier set corresponding to each mobile terminal.

[0090] After determining the subcarrier set corresponding to each mobile terminal, the base station can further determine the communication data to be transmitted to each mobile terminal according to the service requirements, write the communication data to be transmitted into the subcarrier set corresponding to the mobile terminal to generate a subcarrier signal, and after generating an OFDM signal according to the subcarrier signal, communicate with the mobile terminal through the OFDM signal. In one embodiment, communicating with each mobile terminal according to the subcarrier set corresponding to each mobile terminal includes:

[0091] Step 1061: Determine the communication data corresponding to each mobile terminal.

[0092] In one embodiment, when the base station communicates with the mobile terminal, it first needs to determine the communication data that needs to be transmitted to each mobile terminal according to the service requirements.

[0093] Step 1062: write the communication data corresponding to each mobile terminal into the subcarrier set corresponding to the mobile terminal, and clear the data of the subcarrier set outside the resource mapping relationship.

[0094] After determining the communication data that needs to be transmitted to each mobile terminal, the base station needs to further write the communication data into the subcarrier set corresponding to the mobile terminal, and clear the data of the subcarrier set not included in the resource mapping relationship in the 223~235MHz frequency band. Specifically, when writing the communication data into the subcarrier set, the communication data needs to be modulated first, and the data is mapped to a point on the complex plane according to the selected modulation method to form a modulation symbol, and the modulated symbol is allocated to the subcarrier set corresponding to the mobile terminal.

[0095] Step 1063: Generate OFDM symbols according to the subcarrier set in which the communication data is written and the subcarrier set in which the data is cleared, and send a time slot signal composed of the OFDM symbols to the mobile terminal.

[0096] After writing the communication data into the corresponding subcarrier set and clearing the data of other subcarrier sets, the time slot signal can be further generated according to the subcarrier set in which the communication data is written and the subcarrier set in which the data is cleared in the 223~235MHz frequency band. Specifically, when generating the time slot signal, the subcarrier set can be subjected to an inverse fast Fourier transform, so that the subcarrier signal in the frequency domain is transformed to the time domain through IFFT to form an OFDM symbol. After obtaining the OFDM symbol, a guard interval is added between the OFDM symbols, and then multiple OFDM symbols (including the guard interval) are assembled into a time slot signal in sequence. Finally, the base station can send the time slot signal to the mobile terminal. After receiving the time slot signal, the mobile terminal decodes the communication data carried by the corresponding subcarrier set from the time slot signal according to the subcarrier set corresponding to itself, and performs corresponding actions according to the communication data.

[0097] As described above, the embodiment of the present invention provides a communication method based on discrete narrowband frequency resources. In the embodiment of the present invention, a resource mapping relationship is jointly maintained in a base station and a mobile terminal. After the base station allocates a resource block to each mobile terminal according to the signal processing capability, the base station sends scheduling configuration information to each mobile terminal to inform the mobile terminal of the resource block and the target subcarrier spacing called. After that, the base station and the mobile terminal can query the resource mapping relationship according to the resource block and the target subcarrier spacing to determine the subcarrier set corresponding to the mobile terminal. Subsequently, the base station can communicate with the mobile terminal according to the subcarrier set corresponding to each mobile terminal. In the embodiment of the present invention, by pre-setting the subcarrier set corresponding to each resource block and the subcarrier spacing in the resource mapping relationship, the base station and the mobile terminal determine the subcarrier set during communication by querying the resource mapping relationship, so as to improve the utilization rate of narrowband frequency resources, thereby improving the efficiency and reliability of information transmission, and solving the technical problem that when using narrowband frequency resources for communication in the prior art, the frequency resources cannot be fully utilized, resulting in low information transmission efficiency and poor reliability. In addition, in the present application, a subcarrier spacing that can divide the subband bandwidth is also set in the resource mapping relationship, and the frequency spacing between two adjacent subbands is an integer multiple of the subcarrier spacing, thereby ensuring that the subcarrier signals of all subbands are mutually orthogonal, eliminating the interference problem between adjacent subbands caused by the independent generation of waveform signals by each subband.

[0098] The embodiment of the present invention also provides another communication method based on discrete narrowband frequency resources, such as Figure 5 As shown, Figure 5 A flow chart of another communication method based on discrete narrowband frequency resources provided by an embodiment of the present invention, Figure 5 The communication method based on discrete narrowband frequency resources is applicable to a mobile terminal, and includes:

[0099] Step 201: Receive scheduling configuration information sent by a base station, where the scheduling configuration information includes resource blocks called by a mobile terminal and corresponding target subcarrier spacing.

[0100] In this embodiment, the mobile terminal needs to receive the scheduling configuration information sent by the base station in real time, wherein the scheduling configuration information includes the resource blocks called when the mobile terminal communicates with the base station and the target subcarrier spacing when the mobile terminal communicates with the base station. It can be understood that the scheduling configuration information includes the first resource block called by the uplink shared channel PUSCH of the mobile terminal, or the second resource block called by the downlink shared channel PDSCH. The specific process of the base station generating the scheduling configuration information can refer to the process of generating the scheduling configuration information in the above embodiment, and will not be repeated in this embodiment.

[0101] Step 202: determine the resource blocks and the corresponding target subcarrier spacing in the scheduling configuration information, and determine the corresponding subcarrier set according to the resource blocks, the target subcarrier spacing and the preset resource mapping relationship. The resource mapping relationship includes a subcarrier set corresponding to each resource block at different subcarrier spacings.

[0102] After receiving the scheduling configuration information, the mobile terminal parses the scheduling configuration information to determine the resource blocks and the corresponding target subcarrier intervals included in the scheduling configuration information. After parsing the resource blocks and the target subcarrier intervals, the corresponding subcarrier set is determined in the pre-set resource mapping relationship, so as to subsequently communicate with the base station according to the corresponding subcarrier set. The mobile terminal is pre-set by the user and stored locally in the mobile terminal, and the resource mapping relationship stored in each mobile terminal is the same as the resource mapping relationship stored in the base station, and the resource mapping relationship includes a subcarrier set corresponding to each resource block at different subcarrier intervals. It can be understood that when the resource mapping relationship needs to be updated, the resource mapping relationship in the base station and all mobile terminals needs to be updated.

[0103] Step 203: Communicate with the base station according to the corresponding subcarrier set.

[0104] After determining the corresponding subcarrier set, the mobile terminal can communicate with the base station according to the corresponding subcarrier set, where the subcarrier set includes the subcarrier set used when the uplink shared channel PUSCH of the mobile terminal communicates with the base station, or the subcarrier set used when the downlink shared channel PDSCH communicates with the base station.

[0105] Based on the above embodiment, in step 203, communicating with the base station according to the corresponding subcarrier set includes:

[0106] Step 2031: Receive a time slot signal and extract an OFDM symbol from the time slot signal, where the time slot signal is composed of multiple OFDM symbols.

[0107] In this embodiment, when the mobile terminal receives data sent by the base station, it needs to receive the time slot signal sent by the base station in real time. Since the time slot signal is composed of multiple OFDM symbols, after receiving the time slot signal sent by the base station, the mobile terminal first needs to parse the OFDM symbol from the time slot signal. The specific process of parsing the OFDM symbol from the time slot signal can refer to the prior art, which will not be repeated in this embodiment.

[0108] Step 2032: parse the first subcarrier set in the OFDM symbol, determine the target subcarrier set in the first subcarrier set according to the corresponding subcarrier set, extract communication data from the target subcarrier set, and write the communication data into the target subcarrier set by the base station.

[0109] After parsing the OFDM symbol from the time slot signal, the mobile terminal needs to further parse out the first subcarrier set in the OFDM symbol, and filter the parsed first subcarrier set to obtain the target subcarrier set. Specifically, when filtering the first subcarrier set, the mobile terminal first needs to determine the subcarrier set range used in the communication system. The subcarrier set range can be obtained through system configuration or signaling information, or the subcarrier set range of the communication system can be determined according to the subcarrier set included in the resource mapping relationship, wherein the communication system includes a base station and a mobile terminal communicating with the base station. The mobile terminal can selectively retain the signal components on these subcarrier sets based on the known subcarrier set range in the communication system, and filter out the subcarrier sets outside the communication system. The retained subcarrier set is the second subcarrier set. After screening out the second subcarrier set, the mobile terminal determines the target subcarrier set in the second subcarrier set according to the frequency band corresponding to its own subcarrier set, and demodulates and decodes the subcarrier signals corresponding to the target subcarrier set to restore the original data information, thereby obtaining the communication data written by the base station, and then executing corresponding actions according to the communication data.

[0110] As described above, the embodiment of the present invention provides a communication method based on discrete narrowband frequency resources. The embodiment of the present invention jointly maintains a resource mapping relationship in the base station and the mobile terminal. The mobile terminal can determine the corresponding subcarrier set by querying the resource mapping relationship according to the resource block allocated by the base station and the target subcarrier interval. The mobile terminal can then communicate with the base station according to the corresponding subcarrier set. The embodiment of the present invention pre-sets the resource mapping relationship and pre-sets the subcarrier set corresponding to each resource block and subcarrier interval in the resource mapping relationship. This can improve the utilization rate of narrowband frequency resources, improve the efficiency and reliability of information transmission, and solve the technical problem of low information transmission efficiency and poor reliability in the prior art when using narrowband frequency resources for communication. In addition, compared with the traditional solution of performing independent signal processing on each subband, the embodiment of the present invention can reduce the amount of calculation and the complexity of calculation, and improve the calculation efficiency.

[0111] An embodiment of the present invention provides a communication device based on discrete narrowband frequency resources, such as Figure 6 As shown, Figure 6 A schematic diagram of the structure of a communication device based on discrete narrowband frequency resources provided by an embodiment of the present invention, Figure 6 The communication device based on discrete narrowband frequency resources is suitable for a base station, and includes:

[0112] The information determination module 301 is used to determine the signal processing capability of each mobile terminal after the mobile terminal joins the network, where the signal processing capability is the capability of the mobile terminal to receive or transmit discrete frequency domain signals;

[0113] The resource block determination module 302 is used to determine the resource block called by each mobile terminal and the corresponding target subcarrier spacing according to the current network environment, communication service requirements and signal processing capabilities;

[0114] A first subcarrier determination module 303 is used to determine a subcarrier set called by each mobile terminal according to a resource block, a target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subcarrier set corresponding to each resource block under different subcarrier spacings;

[0115] The information generating module 304 is used to generate scheduling configuration information corresponding to each mobile terminal according to the resource blocks and target subcarrier spacing called by each mobile terminal;

[0116] The information sending module 305 is used to send corresponding scheduling configuration information to each mobile terminal, so that each mobile terminal determines the called subcarrier set by querying the resource mapping relationship;

[0117] The first communication module 306 is configured to communicate with each mobile terminal according to a subcarrier set corresponding to each mobile terminal.

[0118] Based on the above embodiment, the resource mapping relationship includes a subband corresponding to each resource block under different subcarrier spacings, and a subcarrier set corresponding to each subband, and each subband corresponds to A subcarriers, where is a preset value corresponding to the subcarrier spacing, and the value of A is 20.

[0119] Based on the above embodiment, the frequency intervals of two adjacent sub-bands are all integer multiples of the sub-carrier interval, and the sub-carrier interval is any one of 1.25 kHz, 2.5 kHz and 5 kHz.

[0120] Based on the above embodiment, the frequency of the first subcarrier corresponding to each resource block The method of determining is:

[0121]

[0122] in, The subband number, is the number of subcarriers included in the subband, is the number of subcarriers included in the resource block.

[0123] Based on the above embodiment, the scheduling configuration information includes a first resource block called by an uplink shared channel of the mobile terminal, or a second resource block called by a downlink shared channel. The subcarrier set corresponding to the first resource block is used for calling during uplink communication, and the subcarrier set corresponding to the second resource block is used for calling during downlink communication.

[0124] Based on the above embodiment, the first communication module 306 includes:

[0125] A data determination submodule, used to determine the communication data corresponding to each mobile terminal;

[0126] A data writing submodule, used to write the communication data corresponding to each mobile terminal into the subcarrier set corresponding to the mobile terminal, and clear the data of the subcarrier set outside the resource mapping relationship;

[0127] The data sending submodule is used to generate OFDM symbols according to the subcarrier set in which the communication data is written and the subcarrier set in which the data is cleared, and send the time slot signal composed of the OFDM symbols to the mobile terminal.

[0128] An embodiment of the present invention provides a communication device based on discrete narrowband frequency resources, such as Figure 7 As shown, Figure 7 A schematic diagram of the structure of a communication device based on discrete narrowband frequency resources provided by an embodiment of the present invention, Figure 7 The communication device mobile terminal based on discrete narrowband frequency resources shown includes:

[0129] The information receiving module 401 is used to receive the scheduling configuration information sent by the base station, where the scheduling configuration information includes the resource blocks called by the mobile terminal and the corresponding target subcarrier spacing;

[0130] A second subcarrier determination module 402 is used to determine a resource block and a corresponding target subcarrier spacing in the scheduling configuration information, and determine a corresponding subcarrier set according to the resource block, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subcarrier set corresponding to each resource block under different subcarrier spacings;

[0131] The second communication module 403 is configured to communicate with the base station according to a corresponding subcarrier set.

[0132] Based on the above embodiment, the second communication module 403 includes:

[0133] A data receiving submodule is used to receive a time slot signal and extract an OFDM symbol from the time slot signal, where the time slot signal is composed of multiple OFDM symbols;

[0134] The data extraction submodule is used to parse the first subcarrier set in the OFDM symbol, determine the target subcarrier set in the first subcarrier set according to the corresponding subcarrier set, extract communication data from the target subcarrier set, and the communication data is written into the target subcarrier set by the base station.

[0135] The communication device based on discrete narrowband frequency resources provided in the embodiment of the present invention is included in the communication equipment based on discrete narrowband frequency resources, and can be used to execute the communication method based on discrete narrowband frequency resources provided in the above embodiment, and has corresponding functions and beneficial effects.

[0136] It is worth noting that in the above-mentioned embodiment of the communication device based on discrete narrowband frequency resources, the various units and modules included are only divided according to functional logic, but are not limited to the above-mentioned division, as long as the corresponding functions can be achieved; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of the present invention.

[0137] The embodiment of the present invention also provides a communication device based on discrete narrowband frequency resources, such as Figure 8 As shown, Figure 8 A schematic diagram of the structure of a communication device based on discrete narrowband frequency resources provided by an embodiment of the present invention, such as Figure 8 As shown, the communication device 50 based on discrete narrowband frequency resources includes a processor 500 and a memory 501;

[0138] The memory 501 is used to store the computer program 502 and transmit the computer program 502 to the processor 500;

[0139] The processor 500 is configured to execute the steps in the above embodiment of a communication method based on discrete narrowband frequency resources according to the instructions in the computer program 502 .

[0140] Exemplarily, the computer program 502 may be divided into one or more modules / units, one or more modules / units are stored in the memory 501, and are executed by the processor 500 to complete the present application. One or more modules / units may be a series of computer program instruction segments capable of completing specific functions, and the instruction segments are used to describe the execution process of the computer program 502 in the communication device 50 based on discrete narrowband frequency resources.

[0141] The communication device 50 based on discrete narrowband frequency resources can be a computing device such as a desktop computer, a notebook, a PDA, and a cloud server. The communication device 50 based on discrete narrowband frequency resources can include, but is not limited to, a processor 500 and a memory 501. Those skilled in the art can understand that Figure 8 It is merely an example of a communication device 50 based on discrete narrowband frequency resources and does not constitute a limitation on the communication device 50 based on discrete narrowband frequency resources. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the communication device 50 based on discrete narrowband frequency resources may also include input and output devices, network access equipment, buses, etc.

[0142] The processor 500 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0143] The memory 501 may be an internal storage unit of the communication device 50 based on discrete narrowband frequency resources, such as a hard disk or memory of the communication device 50 based on discrete narrowband frequency resources. The memory 501 may also be an external storage device of the communication device 50 based on discrete narrowband frequency resources, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the communication device 50 based on discrete narrowband frequency resources. Further, the memory 501 may also include both an internal storage unit and an external storage device of the communication device 50 based on discrete narrowband frequency resources. The memory 501 is used to store computer programs and other programs and data required by the communication device 50 based on discrete narrowband frequency resources. The memory 501 may also be used to temporarily store data that has been output or is to be output.

[0144] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0145] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0146] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

Claims

1. A communication method based on discrete narrowband frequency resources, applicable to a base station, characterized in that: include: After the mobile terminal accesses the network, determining the signal processing capability of each mobile terminal, where the signal processing capability is the capability of the mobile terminal to receive or transmit discrete frequency domain signals; Determining the resource blocks called by each of the mobile terminals and the corresponding target subcarrier spacing according to the current network environment, communication service requirements and the signal processing capability; Determine a subcarrier set called by each of the mobile terminals according to the resource blocks, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subband corresponding to each of the resource blocks and a subcarrier set corresponding to each of the subbands under different subcarrier spacings, and the frequency spacings of two adjacent subbands are both integer multiples of the subcarrier spacing; Generate scheduling configuration information corresponding to each of the mobile terminals according to the resource blocks called by each of the mobile terminals and the target subcarrier spacing; Sending corresponding scheduling configuration information to each of the mobile terminals, so that each of the mobile terminals determines the called subcarrier set by querying the resource mapping relationship; Communicating with each of the mobile terminals according to a subcarrier set corresponding to each of the mobile terminals.

2. The communication method based on discrete narrowband frequency resources according to claim 1, characterized in that: Each of the subbands corresponds to A subcarriers, where is a preset value corresponding to the subcarrier spacing, and the value of A is 20.

3. The communication method based on discrete narrowband frequency resources according to claim 2, characterized in that: The subcarrier spacing is any one of 1.25 kHz, 2.5 kHz and 5 kHz.

4. The communication method based on discrete narrowband frequency resources according to claim 3, characterized in that: The frequency of the first subcarrier corresponding to each resource block The method of determining is: in, the sequence number of the subband, is the number of subcarriers included in the subband, is the number of subcarriers included in the resource block.

5. The communication method based on discrete narrowband frequency resources according to claim 1, characterized in that: The scheduling configuration information includes a first resource block called by an uplink shared channel of the mobile terminal or a second resource block called by a downlink shared channel. The subcarrier set corresponding to the first resource block is used for calling during uplink communication, and the subcarrier set corresponding to the second resource block is used for calling during downlink communication.

6. The communication method based on discrete narrowband frequency resources according to claim 1, characterized in that: The communicating with each of the mobile terminals according to the subcarrier set corresponding to each of the mobile terminals comprises: determining communication data corresponding to each of the mobile terminals; Writing the communication data corresponding to each of the mobile terminals into the subcarrier set corresponding to the mobile terminal, and clearing the data of the subcarrier set outside the resource mapping relationship; An OFDM symbol is generated according to the subcarrier set in which the communication data is written and the subcarrier set in which the data is cleared, and a time slot signal composed of the OFDM symbol is sent to the mobile terminal.

7. A communication method based on discrete narrowband frequency resources, applicable to a mobile terminal, characterized in that: include: Receiving scheduling configuration information sent by a base station, wherein the scheduling configuration information includes a resource block called by the mobile terminal and a corresponding target subcarrier spacing; Determine the resource blocks and the corresponding target subcarrier spacing in the scheduling configuration information, and determine the corresponding subcarrier set according to the resource blocks, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subband corresponding to each resource block under different subcarrier spacings, and a subcarrier set corresponding to each subband, and the frequency intervals of two adjacent subbands are both integer multiples of the subcarrier spacing; Communicate with the base station according to the corresponding subcarrier set.

8. The communication method based on discrete narrowband frequency resources according to claim 7, characterized in that: Communicating with the base station according to the corresponding subcarrier set includes: Receiving a time slot signal, and extracting an OFDM symbol in the time slot signal, wherein the time slot signal is composed of a plurality of the OFDM symbols; Parse a first subcarrier set in the OFDM symbol, determine a target subcarrier set in the first subcarrier set according to the corresponding subcarrier set, extract communication data from the target subcarrier set, and write the communication data into the target subcarrier set by the base station.

9. A communication device based on discrete narrowband frequency resources, applicable to a base station, characterized in that: include: An information determination module, used to determine the signal processing capability of each mobile terminal after the mobile terminal joins the network, wherein the signal processing capability is the capability of the mobile terminal to receive or transmit discrete frequency domain signals; A resource block determination module, used to determine the resource block called by each of the mobile terminals and the corresponding target subcarrier spacing according to the current network environment, communication service requirements and the signal processing capability; A first subcarrier determination module, configured to determine a subcarrier set called by each of the mobile terminals according to the resource block, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subband corresponding to each of the resource blocks and a subcarrier set corresponding to each of the subbands under different subcarrier spacings, and the frequency spacings of two adjacent subbands are both integer multiples of the subcarrier spacing; An information generating module, configured to generate scheduling configuration information corresponding to each of the mobile terminals according to the resource blocks called by each of the mobile terminals and the target subcarrier spacing; An information sending module, used for sending corresponding scheduling configuration information to each of the mobile terminals, so that each of the mobile terminals determines the called subcarrier set by querying the resource mapping relationship; The first communication module is used to communicate with each of the mobile terminals according to a subcarrier set corresponding to each of the mobile terminals.

10. A communication device based on discrete narrowband frequency resources, suitable for a mobile terminal, characterized in that: include: An information receiving module, configured to receive scheduling configuration information sent by a base station, wherein the scheduling configuration information includes a resource block called by the mobile terminal and a corresponding target subcarrier spacing; A second subcarrier determination module, used to determine the resource blocks and the corresponding target subcarrier spacing in the scheduling configuration information, and determine the corresponding subcarrier set according to the resource blocks, the target subcarrier spacing and a preset resource mapping relationship, wherein the resource mapping relationship includes a subband corresponding to each resource block under different subcarrier spacings, and a subcarrier set corresponding to each subband, and the frequency intervals of two adjacent subbands are both integer multiples of the subcarrier spacing; The second communication module is used to communicate with the base station according to the corresponding subcarrier set.

11. A communication device based on discrete narrowband frequency resources, characterized in that: The communication device based on discrete narrowband frequency resources includes a processor and a memory; The memory is used to store a computer program and transmit the computer program to the processor; The processor is configured to execute the communication method based on discrete narrowband frequency resources according to any one of claims 1 to 8 according to the instructions in the computer program.

12. A storage medium storing computer executable instructions, characterized in that: When the computer executable instructions are executed by a computer processor, they are used to perform the communication method based on discrete narrowband frequency resources according to any one of claims 1 to 8.

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