Multi-carrier hybrid transmission method

[0034] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of the embodiments of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0035] figure 1 This is the multi-carrier hybrid transmission method of the embodiment of the present invention, such as figure 1 As shown, the method includes:

[0036] Step S01: Acquire the data to be transmitted within a preset time period, and divide all the data to be transmitted into at least one transmission bit group according to the scene type of the data to be transmitted; wherein, the data to be transmitted in each transmission bit group The scene type of the data is the same.

[0037] The sending end obtains the data to be transmitted to the receiving end within a preset time period. It can be divided into different scene types according to different application scenarios, such as Internet of Vehicles data, voice call data or high-definition video data. There are different requirements in terms of real-time, accuracy, and delay requirements, so the data to be transmitted can be divided into multiple scene types in advance. According to the different scene types, the data to be transmitted of the same scene type is combined into one transmission bit group, thereby dividing all the data to be transmitted into multiple transmission bit groups.

[0038] Step S02: Modulate each transmission bit group into a signal to be transmitted by a corresponding modulation module; wherein the module type and subcarrier capacity of the modulation module are obtained according to the scene type and data volume of the corresponding transmission bit group.

[0039] Since the scene types of the data to be transmitted in the same transmission bit group are the same, that is, the requirements for transmission performance are also the same, so that according to the scene type and the data volume of the data to be transmitted in the transmission bit group, the data to be transmitted in the transmission bit group can be compared with the transmission bit group. The module type of the corresponding modulation module, such as OFDM modulation with QAM modulation, window OFDM modulation with a roll-off factor of 1/16, etc., and the subcarrier capacity that the modulation module can carry, such as 256, 512, etc. Then, the obtained modulation modules are used to respectively modulate the data to be transmitted in the corresponding transmission bit group into signals to be transmitted.

[0040] Further, the step S02 is specifically:

[0041] Obtain the module type of the corresponding modulation module according to the scene type of the transmission bit group;

[0042] Obtaining the number of subcarriers to be transmitted required by the transmission bit group according to the data amount of the transmission bit group and the module type of the corresponding modulation module;

[0043] The subcarrier capacity of the modulation module is obtained according to the number of subcarriers to be transmitted; wherein the subcarrier capacity is greater than the number of subcarriers to be transmitted.

[0044] There are many methods for obtaining the modulation module corresponding to each transmission bit group, and only one method is given as an example in the embodiment of the present invention.

[0045] The module type of the modulation module corresponding to each scene type can be determined in advance based on a large amount of historical data or numerical calculations. Therefore, after grouping all the data to be transmitted, the module type of the corresponding modulation module can be obtained according to the scene type of each transmission bit group.

[0046] So far, the unit data volume that can be carried by each subcarrier in the modulation module can be obtained. Then, according to the data volume in the transmission bit group and the unit data volume of the corresponding modulation module, the number of subcarriers to be transmitted required by the modulation module to modulate the transmission bit group, that is, the minimum number of subcarriers required by the modulation module . Therefore, the subcarrier capacity of the modulation module can be obtained by adding a certain margin to the number of subcarriers to be transmitted. The sub-carrier capacity is equivalent to the number of samples for IFFT transformation in the modulation module, and the value of the number of samples is a power of two. Therefore, the sub-carrier capacity of the modulation module is also a power of two. For example, if the sending end divides the obtained data to be transmitted into three transmission bit groups a1, a2, a3, corresponding to scene types b1, b2, and b3, the obtained modulation modules are c1, c2, and c3, respectively. The amount of data in the bit group can be obtained as the corresponding number of subcarriers to be transmitted as N c1 = 800, N c2 =200, N c3 =400, then the sub-carrier capacity of the corresponding modulation module is N s1 =1024, N s2 =256, N s3 =512.

[0047] In the actual application process, a plurality of module types suitable for each scene type can also be given first, and then the module type and subcarrier capacity of the most suitable modulation module are determined according to the data volume of the transmission bit group.

[0048] Step S03: Up-converting each signal to be transmitted to a corresponding carrier frequency band to obtain a packet signal; wherein the bandwidth of each carrier frequency band is obtained according to the sub-carrier capacity of the corresponding modulation module, and any two signals to be transmitted correspond to The carrier frequency bands do not overlap each other.

[0049] Through up-conversion, each signal to be transmitted is transmitted from non-overlapping carrier frequency bands to obtain a packet signal. The bandwidth of the carrier frequency band corresponding to each signal to be transmitted is obtained from the subcarrier capacity of the modulation module that obtains the signal to be transmitted. For example, sending bit groups a1, a2, a3, modulated by modulation modules c1, c2, c3 to obtain signals to be transmitted d1, d2, d3, and then up-converting d1, d2, and d3 to the corresponding carrier [fmin1, fmin1+N s1 *Δf], [fmin2, f2min+N s2 *Δf], [fmin3, fmin3+N s3 *Δf], where fmin2=fmin1+N s1 *Δf+ΔF, fmin3=fmin2+N s2 *Δf+ΔF, the Δf is the sub-carrier bandwidth, for example 0.015MHz, and the ΔF is the up-conversion guard interval bandwidth, for example, ΔF=10*Δf. There are many ways to allocate carrier frequency bands, which can be specifically set according to the actual transmission bandwidth and frequency band, which are not specifically limited here.

[0050] Step S04: Combine all the packet signals and send them to the receiving end, so that the receiving end will down-convert the received packet signals into corresponding signals to be transmitted, and then use the demodulation module corresponding to the modulation module to Each signal to be transmitted is demodulated into the transmission bit group.

[0051] The sending end combines all the obtained packet signals and sends them to the receiving end through the radio frequency unit. Through down-conversion, the receiving end can restore the received packet signal to the signal to be transmitted, and then demodulate the signal to be transmitted by the corresponding demodulation module according to the scene type corresponding to each signal to be transmitted. Finally, the corresponding transmission bit group is obtained. Then combine all the data to be transmitted in the transmission bit group to obtain all the data to be transmitted.

[0052] The embodiment of the present invention divides the data to be transmitted of different scene types into different transmission bit groups, and obtains the module type and subcarrier capacity of the corresponding modulation module according to the scene type and the data volume of the transmission bit group, and then up-converts after modulation To the non-overlapping carrier frequency bands to send to the receiving end, so that the receiving end uses the corresponding demodulation module to demodulate all the transmitted bit groups, which can efficiently realize multi-carrier transmission of multiple scenarios and improve the system Transmission performance.

[0053] Based on the foregoing embodiment, further, the method further includes:

[0054] According to the preset power peak-to-average ratio threshold, obtain the adjustable data amount that can be modulated for each modulation module;

[0055] If the data volume of the transmission bit group exceeds the adjustable data volume of the corresponding modulation module, it is necessary to divide the transmission bit group into at least two new transmission bit groups that meet the adjustable data volume, and respectively Obtain the adjustable data amount of the modulation module corresponding to each new transmission bit group.

[0056] Excessive number of subcarriers will make the peak to average power ratio (PAPR) of the signal output by the modulation module too high, which will affect the transmission performance of the system. For this reason, the number of subcarriers of each modulation module needs to be limited to It can meet the preset power peak-to-average ratio threshold.

[0057] According to the power peak-to-average ratio threshold value and the modulation type of each modulation module, the subcarrier threshold value of the modulation module can be obtained, and the adjustable data amount that each modulation module can carry can be calculated.

[0058] If the data volume of the transmission bit group exceeds the adjustable data volume of the corresponding modulation module, the transmission bit group needs to be divided into at least two new transmission bit groups that meet the adjustable data volume, and according to The new transmission bit group gets its own modulation module, and then performs subsequent modulation and up-conversion operations.

[0059] In the embodiment of the present invention, the adjustable data amount of each modulation module is obtained through a preset power peak-to-average ratio threshold, and after the transmission bit group whose data amount exceeds the adjustable data amount is divided, the respective modulation modules are used to perform the processing. Modulation, so that the system can reduce the output power peak-to-average ratio to the greatest extent when meeting a large number of sub-carriers, and improve the transmission performance of the system.

[0060] image 3 It is a schematic diagram of a system structure for a multi-carrier hybrid transmission method according to an embodiment of the present invention, such as image 3 As shown, the modulation mode adopted by the modulation module includes at least OFDM modulation, windowed OFDM modulation, and filter bank OFDM modulation.

[0061] There are many modulation methods and module types that can be applied to the embodiments of the present invention, image 3 Only three modulation methods are given for illustration, namely OFDM modulation, windowed OFDM modulation and filter bank OFDM modulation. The three modulation technologies are all based on the IFFT/FFT OFDM modulation technology, and the OFDM modulation can simply, efficiently and quickly realize orthogonal frequency division multiplexing multi-carrier transmission only through fast Fourier transform. Windowed OFDM modulation windows the OFDM symbols containing N subcarriers in the time domain, thereby realizing the modulation of multi-carrier transmission in the time domain, which not only reduces the interference between subcarriers, but also reduces the loss of information energy. The filter bank OFDM modulation uses frequency shifting to establish N filters to achieve the purpose of filtering each sub-carrier in the frequency domain, so that multi-carrier transmission is as consistent as possible with the basic characteristics of the carried information and the basic characteristics of wireless channel transmission, and the Carrier transmission performance and information transmission quality. Comprehensive application of multiple multi-carrier transmission technologies such as OFDM, windowed OFDM and filter bank OFDM with module method and frequency division multiplexing technology, so that the sub-carriers in each module are different, and realize the IFFT/FFT-based OFDM multi-carrier transmission Flexible application of technology.

[0062] Such as image 3 As shown, after all the data to be transmitted are interleaved as serial bits through channel coding, the total bits obtained are divided into transmission bit groups with different lengths according to different scene types: transmission bit 1 group, transmission bit 2 group, transmission After 3 groups, the OFDM modulation module, windowed OFDM modulation module, and filter bank OFDM modulation module are used to modulate the signals to be transmitted, which are up-converted into grouped signals and combined and sent to the receiving end. The receiving end obtains the signals to be transmitted through down-conversion, and demodulates them by their corresponding OFDM demodulation module, windowed OFDM demodulation module, and filter bank OFDM demodulation module to obtain each transmission bit group. The serial bits are obtained by combining and deintersecting the channel code. Because the number of sub-carriers and the attack process of the three modulation modules are different, the symbol time extension and module delay are required for up-conversion, and the symbol time-reduction is required for down-conversion to ensure that the three-module transmission signal is up-converted and combined. The down-conversion separated symbols are demodulated correctly.

[0063] In addition to the above-mentioned three modulation and demodulation methods, other technologies can also be used, which are not specifically limited here. For each specific module type, it can be further subdivided. For example, the windowed OFDM modulation and demodulation module can be based on different window functions, and the filter bank OFDM modulation and demodulation module can be based on different prototype filter functions. It can be subdivided separately by different baseband modulation and demodulation methods.

[0064] The embodiment of the present invention modulates and demodulates transmission bit groups of different scene types by using corresponding modulation modules. The module types of the modulation modules can be subdivided according to different modulation methods, so that multiple scene types can be efficiently realized. The multi-carrier transmission improves the transmission performance of the system.

[0065] figure 2 Is a flowchart of another multi-carrier hybrid transmission method according to an embodiment of the present invention, such as figure 2 As shown, the method includes:

[0066] Step S10, receiving all packet signals sent by the sending end; wherein the sending end obtains the data to be transmitted within a preset period of time by the sending end, and all the data to be transmitted are collected according to the scene type of the data to be transmitted Is divided into at least one transmission bit group; wherein, the scene type of the data to be transmitted in each transmission bit group is the same; the transmitting end modulates each transmission bit group into a signal to be transmitted through a corresponding modulation module; wherein, the The module type and sub-carrier capacity of the modulation module are obtained according to the scene type and data volume of the corresponding transmission bit group; the transmitting end up-converts each signal to be transmitted to the corresponding carrier frequency band to obtain a packet signal; wherein, each carrier The bandwidth of the frequency band is obtained according to the sub-carrier capacity of the corresponding modulation module, and the carrier frequency bands corresponding to any two signals to be transmitted do not overlap each other.

[0067] The sending end obtains the data to be transmitted to the receiving end within a preset time period. According to different application scenarios, it can be divided into different scenarios. Various types of data are different in real-time, accuracy, and delay requirements. Therefore, the data to be transmitted can be divided into multiple scene types in advance. According to the different scene types, the data to be transmitted of the same scene type is combined into one transmission bit group, thereby dividing all the data to be transmitted into multiple transmission bit groups.

[0068] Since the scene types of the data to be transmitted in the same transmission bit group are the same, that is, the requirements for transmission performance are also the same, so that according to the scene type and the data volume of the data to be transmitted in the transmission bit group, the data to be transmitted in the transmission bit group can be compared with the transmission bit group. The module type of the corresponding modulation module and the subcarrier capacity that the modulation module can carry. Then, the obtained modulation modules are used to respectively modulate the data to be transmitted in the corresponding transmission bit group into signals to be transmitted.

[0069] Further, the module type and subcarrier capacity of the modulation module are obtained according to the scene type and data volume of the corresponding transmission bit group, which are specifically:

[0070] Obtain the module type of the corresponding modulation module according to the scene type of the transmission bit group;

[0071] Obtaining the number of subcarriers to be transmitted required by the transmission bit group according to the data amount of the transmission bit group and the module type of the corresponding modulation module;

[0072] The subcarrier capacity of the modulation module is obtained according to the number of subcarriers to be transmitted; wherein the subcarrier capacity is greater than the number of subcarriers to be transmitted.

[0073] There are many methods for obtaining the modulation module corresponding to each transmission bit group, and only one method is given as an example in the embodiment of the present invention.

[0074] According to a large amount of historical data or numerical calculations, the module type of the modulation module corresponding to each scene type is determined in advance. Therefore, after grouping all the data to be transmitted, the module type of the corresponding modulation module can be obtained according to the scene type of each transmission bit group.

[0075] So far, the unit data volume that can be carried by each subcarrier in the modulation module can be obtained. Then, according to the data volume in the transmission bit group and the unit data volume of the corresponding modulation module, the number of subcarriers to be transmitted required by the modulation module to modulate the transmission bit group, that is, the minimum number of subcarriers required by the modulation module . Therefore, the subcarrier capacity of the modulation module can be obtained by adding a certain margin to the number of subcarriers to be transmitted. The sub-carrier capacity is equivalent to the number of samples for IFFT transformation in the modulation module, and the value of the number of samples is a power of two. Therefore, the sub-carrier capacity of the modulation module is also a power of two.

[0076] In the actual application process, a plurality of module types suitable for each scene type can also be given first, and then the module type and subcarrier capacity of the most suitable modulation module are determined according to the data volume of the transmission bit group.

[0077] Through up-conversion, each signal to be transmitted is transmitted from non-overlapping carrier frequency bands to obtain a packet signal. The bandwidth of the carrier frequency band corresponding to each signal to be transmitted is obtained from the subcarrier capacity of the modulation module that obtains the signal to be transmitted.

[0078] Step S11: Down-convert the received packet signal into a corresponding signal to be transmitted.

[0079] Step S12: Demodulate each signal to be transmitted into the transmission bit group through a demodulation module corresponding to the modulation module one-to-one.

[0080] The sending end combines all the obtained packet signals and sends them to the receiving end through the radio frequency unit. Through down-conversion, the receiving end can restore the received packet signal to the signal to be transmitted, and then according to the scene type corresponding to each signal to be transmitted, the demodulation module corresponding to the modulation module will perform the processing on the signal to be transmitted. The signal is demodulated, for example, the windowed OFDM modulation module corresponds to the windowed OFDM demodulation module, and each parameter therein is also corresponding to each other, and the corresponding transmission bit group is finally obtained. Then combine all the data to be transmitted in the transmission bit group to obtain all the data to be transmitted.

[0081] The embodiment of the present invention divides the data to be transmitted of different scene types into different transmission bit groups, and obtains the module type and subcarrier capacity of the corresponding modulation module according to the scene type and the data volume of the transmission bit group, and then up-converts after modulation To the non-overlapping carrier frequency bands to send to the receiving end, so that the receiving end uses the corresponding demodulation module to demodulate all the transmitted bit groups, which can efficiently realize multi-carrier transmission of multiple scenarios and improve the system Transmission performance.

[0082] Based on the foregoing embodiment, further, the method further includes:

[0083] The transmitting end obtains the adjustable data amount that can be modulated for each modulation module according to a preset power peak-to-average ratio threshold;

[0084] If the data volume of the transmission bit group exceeds the adjustable data volume of the corresponding modulation module, the transmitting end needs to divide the transmission bit group into at least two new transmission bits that meet the adjustable data volume Group, and respectively obtain the modulation module corresponding to each new transmission bit group for modulation.

[0085] The power peak-to-average ratio threshold preset by the transmitting end, and then according to the power peak-to-average ratio threshold value and the modulation type of each modulation module, the subcarrier threshold value of the modulation module can be obtained, and then it can be calculated that each modulation module can Adjustable amount of data carried.

[0086] If the data volume of the transmission bit group exceeds the adjustable data volume of the corresponding modulation module, the transmission bit group needs to be divided into at least two new transmission bit groups that meet the adjustable data volume, and according to The new transmission bit group gets its own modulation module, and then performs subsequent modulation and up-conversion operations.

[0087] In the embodiment of the present invention, the adjustable data amount of each modulation module is obtained through a preset power peak-to-average ratio threshold, and after the transmission bit group whose data amount exceeds the adjustable data amount is divided, the respective modulation modules are used to perform the processing. Modulation, so that the system can reduce the output power peak-to-average ratio to the greatest extent when meeting a large number of sub-carriers, and improve the transmission performance of the system.

[0088] Based on the foregoing embodiment, further, the demodulation mode adopted by the demodulation module includes at least OFDM demodulation, windowed OFDM demodulation, and filter bank OFDM demodulation.

[0089] There are many demodulation methods and module types that can be applied to the embodiments of the present invention, such as image 3 As shown, only three demodulation methods are given, namely OFDM demodulation, windowed OFDM demodulation, and filter bank OFDM demodulation.

[0090] Such as image 3 As shown, after all the data to be transmitted are interleaved as serial bits through channel coding, the total bits obtained are divided into transmission bit groups with different lengths according to different scene types: transmission bit 1 group, transmission bit 2 group, transmission After 3 groups, the OFDM modulation module, windowed OFDM modulation module, and filter bank OFDM modulation module are used to modulate the signals to be transmitted, which are up-converted into grouped signals and combined and sent to the receiving end. The receiving end obtains the signals to be transmitted through down-conversion, and demodulates them by their corresponding OFDM demodulation module, windowed OFDM demodulation module, and filter bank OFDM demodulation module to obtain each transmission bit group. The serial bits are obtained by combining and deintersecting the channel code. Because the number of sub-carriers and the attack process of the three modulation modules are different, the symbol time extension and module delay are required for up-conversion, and the symbol time-reduction is required for down-conversion to ensure that the three-module transmission signal is up-converted and combined. The down-conversion separated symbols are demodulated correctly.

[0091] In addition to the above three demodulation methods, other technologies can be used, which are not specifically limited here. The module type of each demodulation module is the same as the module type of the modulation module.

[0092] The embodiment of the present invention modulates and demodulates transmission bit groups of different scene types by using corresponding modulation modules. The module types of the modulation modules can be subdivided according to different modulation methods, so that multiple scene types can be efficiently realized. The multi-carrier transmission improves the transmission performance of the system.

[0093] Figure 4 An example of the physical structure diagram of an electronic device, such as Figure 4 As shown, the server may include: a processor (processor) 810, a communication interface (Communications Interface) 820, a memory (memory) 830, and a communication bus 840, where the processor 810, the communication interface 820, and the memory 830 are completed by the communication bus 840 Communication between each other. The processor 810 may call the logic instructions in the memory 830 to perform the following method: obtain the data to be transmitted within a preset time period, and divide all the data to be transmitted into at least one transmission according to the scene type of the data to be transmitted Bit group; wherein the scene type of the data to be transmitted in each transmission bit group is the same; each transmission bit group is modulated into a signal to be transmitted by the corresponding modulation module; wherein the module type and subcarrier capacity of the modulation module are based on The scene type and data volume of the corresponding transmission bit group are obtained; each signal to be transmitted is up-converted to the corresponding carrier frequency band to obtain a packet signal; wherein, the bandwidth of each carrier frequency band is obtained according to the subcarrier capacity of the corresponding modulation module , And the carrier frequency bands corresponding to any two signals to be transmitted do not overlap each other; all the packet signals are combined and sent to the receiving end, so that the receiving end will down-convert the received packet signal into the corresponding signal to be transmitted, and then pass The demodulation module corresponding to the modulation module one-to-one demodulates each signal to be transmitted into the transmission bit group.

[0094] Further, an embodiment of the present invention discloses a computer program product, the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, when the program instructions are During execution, the computer can execute the methods provided in the above method embodiments, for example, including: acquiring the data to be transmitted within a preset time period, and dividing all the data to be transmitted into at least A transmission bit group; wherein the scene type of the data to be transmitted in each transmission bit group is the same; each transmission bit group is modulated into a signal to be transmitted through a corresponding modulation module; wherein the module type and subcarrier of the modulation module The capacity is obtained according to the scene type and data volume of the corresponding transmission bit group; each signal to be transmitted is up-converted to the corresponding carrier frequency band to obtain the packet signal; wherein, the bandwidth of each carrier frequency band is based on the subcarrier of the corresponding modulation module The capacity is obtained, and the carrier frequency bands corresponding to any two signals to be transmitted do not overlap each other; all the packet signals are combined and sent to the receiving end, so that the receiving end down-converts the received packet signal into the corresponding signal to be transmitted, Then demodulate each signal to be transmitted into the transmission bit group through a demodulation module corresponding to the modulation module one-to-one.

[0095] Further, an embodiment of the present invention provides a non-transitory computer-readable storage medium, the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the methods provided in the foregoing method embodiments The method, for example, includes: acquiring the data to be transmitted within a preset time period, and dividing all the data to be transmitted into at least one transmission bit group according to the scene type of the data to be transmitted; wherein, in each transmission bit group The scene types of the data to be transmitted are the same; each transmission bit group is modulated into a signal to be transmitted through the corresponding modulation module; wherein the module type and subcarrier capacity of the modulation module are obtained according to the scene type and data volume of the corresponding transmission bit group ; Up-convert each signal to be transmitted to the corresponding carrier frequency band to obtain a packet signal; wherein the bandwidth of each carrier frequency band is obtained according to the sub-carrier capacity of the corresponding modulation module, and any two carrier frequency bands corresponding to the signal to be transmitted Do not overlap each other; combine all the packet signals and send them to the receiving end, so that the receiving end will down-convert the received packet signals into corresponding signals to be transmitted, and then pass the demodulation module corresponding to the modulation module one-to-one Demodulate each signal to be transmitted into the transmission bit group.

[0096] Those of ordinary skill in the art can understand that: in addition, the above-mentioned logic instructions in the memory 830 can be implemented in the form of software functional units and when sold or used as independent products, they can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present invention essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage media include: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disks or optical disks and other media that can store program codes.

[0097] The electronic device and other embodiments described above are only illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, that is, It can be located in one place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solutions of the embodiments. Those of ordinary skill in the art can understand and implement without creative work.

[0098] Through the description of the above implementation manners, those skilled in the art can clearly understand that each implementation manner can be implemented by means of software plus a necessary general hardware platform, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solution essentially or the part that contributes to the existing technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic A disc, an optical disc, etc., include a number of instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiment.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: The technical solutions recorded in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.