Control method and device of heterogeneous single frequency network system, and electronic equipment

Abstract

This application relates to the field of communication technology, and in particular to a control method, apparatus, and electronic device for a heterogeneous single-frequency network system. The method is applied to a control gateway, which communicates with multiple base stations in the heterogeneous single-frequency network system. The method includes acquiring current and historical information of users within the coverage area of ​​each base station; determining the target transmission mode and physical layer channel parameters for each base station based on the current and historical information; generating target control data based on the target transmission mode and physical layer channel parameters; and distributing the target control data to each base station to complete the configuration of each base station. The base station processes service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. Layered transmission of service data from different base stations is achieved through different target transmission modes. This solves the problem in related technologies where the enhancement layer services of small towers in the central area of ​​a large tower are subject to strong interference, and spectrum sharing is limited.

Description

Technical Field

[0001] This application relates to the field of communication technology, and in particular to a control method, apparatus and electronic equipment for a heterogeneous single-frequency network system. Background Technology

[0002] Against the backdrop of the convergence of broadcast and communication networks, HetSFN (Heterogeneous Single Frequency Network) technology, while achieving a combination of wide-area coverage and personalized services through non-orthogonal multiplexing of BL (Basic Layer) and EL (Enhanced Layer), still has two key drawbacks: First, when small towers are integrated into a network, if a small tower is located in the coverage center of a large tower, its transmitted EL signal will suffer strong interference from the high-power EL signal of the large tower, causing the small tower's EL service coverage to fail, thus restricting spectrum sharing and service personalization; Second, existing solutions mostly adopt fixed configurations, making it difficult to achieve a flexible balance between wide-area coverage and differentiated enhancement. Summary of the Invention

[0003] This application provides a control method, apparatus, and electronic equipment for a heterogeneous single-frequency network system to solve the problem in related technologies where the services of the small tower enhancement layer in the central area of ​​a large tower are subject to strong interference and spectrum sharing is limited.

[0004] The first aspect of this application provides a control method for a heterogeneous single-frequency network system. The method is applied to a control gateway, which communicates with multiple base stations in the heterogeneous single-frequency network system. The method includes the following steps: acquiring current and historical information of users within the coverage area of ​​each base station; determining the target transmission mode and physical layer channel parameters of each base station based on the current and historical information; generating target control data based on the target transmission mode and physical layer channel parameters; sending the target control data to each base station to complete the configuration of each base station based on the target control data; sending service data to each base station; the base station processes the service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. The service data includes basic layer service data, first enhancement layer service data, and second enhancement layer service data.

[0005] Optionally, the target transmission mode and physical layer channel parameters of each base station are determined based on current and historical information, including: constructing a network topology model based on current and historical information; predicting the number of mobile terminal users accessing different services based on the network topology model; determining performance indicators under different transmission modes based on the number of users; and determining the target transmission mode and physical layer channel parameters of each base station based on the performance indicators.

[0006] Optionally, before obtaining the current and historical information of users within the coverage area of ​​each base station, the method further includes: obtaining the reference time and reference frequency based on the timing signal; and synchronizing the reference time and reference frequency according to the synchronization mechanism of the heterogeneous single-frequency network signal.

[0007] Optionally, the multiple base stations of the heterogeneous single-frequency network system include only multiple first base stations, and the transmission modes of the first base stations include a first transmission mode and a second transmission mode; the first transmission mode is configured to disable the transmission of first enhancement layer service data and transmit basic layer service data; the second transmission mode is configured to transmit basic layer service data and first enhancement layer service data simultaneously.

[0008] Optionally, the heterogeneous single-frequency network system includes multiple base stations, including a first base station and multiple second base stations. The first base station covers multiple second base stations. The target transmission mode of the first base station includes at least one of a first transmission mode and a second transmission mode. The target transmission mode of the second base station includes at least one of an empty mode, a third transmission mode, and a fourth transmission mode. The third transmission mode is configured to transmit basic layer service data and first enhancement layer service data simultaneously. The fourth transmission mode is configured to transmit basic layer service data and second enhancement layer service data. The service content contained in the second enhancement layer service data and the first enhancement layer service data is different. The empty mode is configured to disable data transmission of the second base station.

[0009] Optionally, if the heterogeneous single-frequency network system includes a first base station and multiple second base stations, the target transmission mode and physical layer channel parameters of each base station are determined based on current information and historical information, including: determining the target transmission mode of the first base station based on current information and historical information; determining the target transmission mode of the second base station based on the target transmission mode of the first base station; and determining the physical layer channel parameters of each base station based on the target transmission mode.

[0010] Optionally, determining the target transmission mode of the second base station based on the target transmission mode of the first base station includes: if the target transmission mode of the first base station is the first transmission mode, then determining the target transmission mode of the second base station as the fourth transmission mode; if the target transmission mode of the first base station is the second transmission mode, then determining the target transmission mode of the second base station as either the third transmission mode or the empty mode based on service requirements.

[0011] Optionally, after the base station sends the processed service data based on the target transmission mode, the method further includes: receiving feedback information from the base station based on the target control data; and updating the target transmission mode and target control data according to the feedback information.

[0012] A second aspect of this application provides a control device for a heterogeneous single-frequency network system, comprising: an acquisition module for acquiring current and historical information of users within the coverage area of ​​each base station; a generation module for determining the target transmission mode and physical layer channel parameters of each base station based on the current and historical information, and generating target control data based on the target transmission mode and physical layer channel parameters; and a distribution module for distributing the target control data to each base station to complete the configuration of each base station based on the target control data, distributing service data to each base station, wherein the base station processes the service data based on the physical layer channel parameters, and sends the processed service data based on the target transmission mode, wherein the service data includes basic layer service data, first enhancement layer service data, and second enhancement layer service data.

[0013] A third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the control method of the heterogeneous single-frequency network system of the first aspect.

[0014] Therefore, this application has the following beneficial effects: This application embodiment can obtain current and historical information of users within the coverage area of ​​each base station through a control gateway; determine the target transmission mode and physical layer channel parameters of each base station based on the current and historical information; generate target control data based on the target transmission mode and physical layer channel parameters; and send the target control data to each base station to complete the configuration of each base station. The base station processes service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. By using different target transmission modes, hierarchical transmission of service data from different base stations is achieved, realizing intelligent scheduling of base stations by the control gateway. This enables the heterogeneous single-frequency network system to dynamically select the target transmission mode of each base station according to the real-time network environment and service requirements, preventing strong signal interference and improving the utilization efficiency of spectrum resources. Therefore, it solves the problem in related technologies where the enhancement layer services of small towers in the central area of ​​large towers are subject to strong interference, and spectrum sharing is limited.

[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating a control method for a heterogeneous single-frequency network system according to an embodiment of this application; Figure 2This is a schematic diagram of a heterogeneous single-frequency network system according to an embodiment of this application; Figure 3 This is a schematic diagram illustrating the interaction between a control gateway and a first base station and a second base station according to an embodiment of this application; Figure 4 This is a schematic diagram of a heterogeneous single-frequency network system composed of multiple first base stations according to an embodiment of this application; Figure 5 This is a schematic diagram of a system in which multiple second base stations are distributed within the coverage area of ​​a single first base station, according to an embodiment of this application. Figure 6 This is a schematic diagram of the enhanced layer service of the second base station when the enhanced layer service of the first base station is shut down according to an embodiment of this application; Figure 7 This is a schematic diagram of a simulation signal flow according to an embodiment of this application; Figure 8 This is an AMI-SNR curve of basic layer service data provided in an embodiment of this application under an AWGN channel; Figure 9 This is an AMI-SNR curve of basic layer service data provided according to an embodiment of this application under the iid Rayleigh channel; Figure 10 This is an AMI-SNR curve of enhancement layer service data provided according to an embodiment of this application under an AWGN channel; Figure 11 This is an AMI-SNR curve of enhancement layer service data provided according to an embodiment of this application under the iid Rayleigh channel; Figure 12 This is a schematic diagram of the control device for a heterogeneous single-frequency network system provided according to an embodiment of this application; Figure 13 This is a schematic diagram of the structure of an electronic device provided according to an embodiment of this application. Detailed Implementation

[0017] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0018] The control method, apparatus, and electronic equipment of a heterogeneous single-frequency network system according to embodiments of this application are described below with reference to the accompanying drawings. Addressing the problem mentioned in the background art where services in the small-tower enhancement layer of a large tower are subject to strong interference and spectrum sharing is limited, this application provides a control method for a heterogeneous single-frequency network system. In this method, current and historical information of users within the coverage area of ​​each base station are acquired; the target transmission mode and physical layer channel parameters of each base station are determined based on the current and historical information; target control data is generated based on the target transmission mode and physical layer channel parameters; the target control data is sent to each base station to complete the configuration of each base station; the base station processes service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode; and layered transmission of service data from different base stations is achieved through different target transmission modes. This solves the problem in the related art where services in the small-tower enhancement layer of a large tower are subject to strong interference and spectrum sharing is limited.

[0019] Specifically, Figure 1 This is a flowchart illustrating a control method for a heterogeneous single-frequency network system provided in an embodiment of this application. The method is applied to a control gateway, which communicates with multiple base stations in the heterogeneous single-frequency network system. The control gateway refers to a module located on the core network side that implements the control and scheduling functions of this embodiment. The control gateway interacts with the base stations to obtain user location, service requirements, terminal reception conditions, and network topology information. It compares performance indicators under different transmission modes, determines the target transmission mode and physical layer channel parameter configuration of the base station, and sends corresponding service data to each base station.

[0020] like Figure 1 As shown, the control method for this heterogeneous single-frequency network system includes the following steps: In step S101, the current and historical information of users within the coverage area of ​​each base station are obtained.

[0021] The base station includes multiple first base stations and multiple second base stations. The first base stations are broadcast towers, and the second base stations are cellular towers. Broadcast towers refer to high-power broadcast transmission nodes with wide-area coverage capabilities, while cellular towers refer to cellular transmission nodes with cell coverage capabilities, typically low-power base stations. These two types of base stations are uniformly scheduled by the control gateway and use a signal synchronization mechanism to achieve simultaneous transmission on the same frequency, thereby solving interference problems and achieving deep integration of broadcast and communication networks. Current information refers to dynamic data reflecting the real-time status of users obtained by the control gateway module from the cellular tower base station through signaling interaction. Specifically, it may include the cell location of the reference access user or user group, service requirements (such as the type of service to be received), and terminal reception conditions (such as terminal capabilities, current signal-to-noise ratio, etc.). Historical information refers to data reflecting the past behavior or status of users obtained by the control gateway module from the cellular tower base station through signaling interaction. It typically includes the user's location trajectory, service access habits, or network access records over a past time period. The base station coverage area is the wide-area coverage range of the first base station and the cell coverage range of the second base station.

[0022] Specifically, the heterogeneous single-frequency network system considered in the embodiments of this application is composed of multiple first base stations and multiple second base stations, such as... Figure 2 As shown, the shaded area represents the typical central area of ​​the first base station, which usually corresponds to an area with strong enhancement layer signals, weak multi-user interference, and high received SNR (Signal-to-Noise Ratio). Typical areas with overlapping coverage from multiple first base stations and strong co-channel interference can be considered as areas of overlapping broadcast towers. It should be noted that... Figure 2 Although the diagram shows the overlapping coverage areas of multiple first base stations, the embodiments of this application, through frequency planning and pilot pattern configuration, ensure that at most two types of co-frequency signals can be distinguished at any receiving location and on the same time-frequency resource. Therefore, even for the overlapping areas of three first base stations, there is actually only a combination of two types of pilot pattern signals, and there is no situation where three different pilot pattern signals are superimposed at the same time, thereby achieving multi-user interference limitation at the cooperative networking level.

[0023] It is understood that the embodiments of this application obtain current and historical information such as cell location, service requirements, and terminal reception conditions of reference access users or user groups by signaling interaction with the first base station and the second base station. Then, based on the aggregated information, the reference access users of the mobile terminal are predicted. By predicting user distribution and service requirements, the foundation can be laid for subsequent intelligent decision-making on the optimal transmission mode combination and physical layer parameter configuration of the base station. Thus, while solving the problem of strong interference of the first base station to some services of the second base station, the efficient sharing of spectrum resources and the on-demand supply of personalized services can be achieved.

[0024] In step S102, the target transmission mode and physical layer channel parameters of each base station are determined based on current information and historical information, and target control data is generated based on the target transmission mode and physical layer channel parameters.

[0025] Among them, the target transmission mode refers to the combination of working states finally selected by the control gateway module for the first and second base stations after comparing performance indicators; the physical layer channel parameters refer to the specific set of parameters used to configure the base station's transmitted signals, mainly including transmit power allocation, coding and modulation parameters of service data, and time-frequency interleaving parameters; the target control data refers to the specific instruction information generated by the control gateway module and used to send to each base station, carrying the determined target transmission mode, transmit power allocation, coding and modulation parameters, and time-frequency interleaving parameters, used to instruct the base station to perform the corresponding configuration.

[0026] It is understood that the embodiments of this application construct a network topology model and predict the number of users based on the summarized current and historical information, and on this basis determine the target transmission mode and corresponding physical layer channel parameters of the first base station and the second base station, and generate target control data including transmission mode, transmit power allocation, coding and modulation parameters and time-frequency interleaving parameters according to the determined mode and parameters. This realizes the intelligent scheduling of base stations by the control gateway, enabling the heterogeneous single-frequency network system to dynamically select the target transmission mode of each base station according to the real-time network environment and service requirements, preventing strong signal interference, thereby improving the utilization efficiency of spectrum resources.

[0027] In this embodiment of the application, the target transmission mode and physical layer channel parameters of each base station are determined based on current information and historical information, including: constructing a network topology model based on current information and historical information; predicting the number of users accessing mobile terminals under different services based on the network topology model; determining performance indicators under different transmission modes based on the number of users; and determining the target transmission mode and physical layer channel parameters of each base station based on the performance indicators.

[0028] The network topology model refers to the system architecture model constructed by the control gateway based on aggregated current information (such as cell location and terminal reception conditions) and historical information. It reflects the coverage relationship, interference environment, and user distribution between the first and second base stations, serving as the basis for subsequent predictions and decisions. Predicting the number of mobile terminal users accessing different services based on the network topology model includes: constructing a network topology model containing base station coverage relationships and user distribution using current and historical information; matching user service needs with network coverage capabilities; simulating the reception environment under different transmission modes using interference and coverage information in the topology model; determining whether users can successfully access the network; and counting all users who meet the reception threshold and can be effectively served. The resulting number is the predicted reference number of mobile terminal users. Performance indicators refer to quantitative standards used to evaluate the performance of different combinations of transmission modes between the first and second base stations. It should be noted that determining performance indicators under different transmission modes using the number of users is a preferred embodiment in this application, but not the only method for achieving performance indicators. Other evaluation methods that can characterize the performance indicators of transmission modes can be used instead. Specifically, determining performance indicators under different transmission modes using the number of users can be: Let the number of users in the enhancement layer corresponding to transmission point m be denoted as... By summing the results for all enhancement layer users that can be effectively served, we can obtain the user-weighted frequency reuse factor. Compare the first base station and the second base station under different combinations of target transmission modes. , choose to The maximum combination of target transmission modes is used to determine the target transmission modes of the first base station and the second base station respectively, and to send handover control commands and corresponding physical layer channel parameter configurations to the first base station and the second base station.

[0029] It is understood that the embodiments of this application utilize the acquired current and historical information to construct a network topology model, and then predict the reference number of mobile terminal access users under different service scenarios based on the model. Subsequently, the performance indicators under different combinations of transmission modes are calculated and compared based on the predicted number of users. Finally, the target transmission mode and corresponding physical layer channel parameters of each base station are determined based on the performance indicators, thus realizing a closed loop from data perception to decision-making. By quantitatively evaluating the spectrum efficiency and interference impact under different modes, it is ensured that the system can automatically select the optimal transmission strategy.

[0030] In this embodiment of the application, before obtaining the current and historical information of users within the coverage area of ​​each base station, the method further includes: obtaining reference time and reference frequency based on the timing signal; and synchronizing the reference time and reference frequency according to the synchronization mechanism of the heterogeneous single-frequency network signal.

[0031] Among them, the synchronization mechanism of heterogeneous single-frequency network signals refers to the mechanism used to ensure that the system implements channel resource scheduling simultaneously, at the same frequency, with the same frame structure, and with the same physical layer sub-channels at different transmitting ends (each base station) based on a unified reference time and a unified reference frequency. This mechanism relies on single-frequency network adapters and single-frequency network timing receiving equipment (such as GPS (Global Positioning System) or BDS (BeiDou Navigation Satellite System) receivers). The timing signal refers to the high-precision time signal transmitted by GPS or BDS. This signal contains precise time information generated by the satellite atomic clock. The receiving equipment obtains the reference time and reference frequency by decoding this signal, which serves as the source of synchronization for the entire network. The second frame initialization packet refers to the data packet containing precise time information that is periodically inserted into the data stream output by the service front end according to a preset period (e.g., set to 1 second, which is specifically set according to actual needs and is not specifically limited here). Its function is to timestamp the data stream so that the receiving end can identify the start position of the frame, thereby achieving strict alignment between the data stream and the physical layer transmission time.

[0032] It is understood that before obtaining user information, the embodiments of this application first establish a signal synchronization mechanism for the heterogeneous single-frequency network. The reference time and reference frequency are calculated by receiving the timing signal sent by the Global Positioning System. Then, according to the synchronization mechanism, a second frame initialization packet containing time information is inserted into the output service data stream at a first preset period, thereby generating and outputting a data stream carrying synchronization information. By introducing satellite timing signals and inserting second frame initialization packets, a unified time and frequency reference for the entire system is established, ensuring that the broadcast tower and cellular tower can achieve strict simultaneous, same-frequency, and same-frame transmission. This effectively suppresses multi-user interference between subcarriers at the physical layer and ensures the collaborative operation of the heterogeneous single-frequency network.

[0033] In this embodiment of the application, the multiple base stations of the heterogeneous single-frequency network system include multiple first base stations. The transmission modes of the first base stations include a first transmission mode and a second transmission mode. The first transmission mode is configured to disable the transmission of first enhancement layer service data and transmit basic layer service data. The second transmission mode is configured to transmit basic layer service data and first enhancement layer service data simultaneously.

[0034] The service data includes basic layer service data and first enhanced layer service data. Basic layer service data refers to data that carries wide-coverage public broadcasting services, such as national news, emergency broadcasts, basic public service information, and national meteorological information, which have nationwide consistency and remain consistent across all first base stations. First enhanced layer service data refers to differentiated regional service data sent by first base stations to their respective central areas, such as live broadcasts of local events like local marathons and local university sports meets, and the content may differ between different first base stations.

[0035] It is understood that when the heterogeneous single-frequency network system of this application embodiment is composed of multiple first base stations, the transmission modes of these first base stations include a first transmission mode and a second transmission mode. This application embodiment selects one of them as the target transmission mode according to the network topology model and user information. The first transmission mode is configured to shut down the transmission of the first enhancement layer service data and only transmit the basic layer service data, while the second transmission mode is configured to transmit both the basic layer service data and the first enhancement layer service data simultaneously. By configuring two switchable transmission modes for the broadcast tower base station, a flexible balance between the wide coverage of the basic layer service and the regional differentiated service of the enhancement layer service is achieved. The transmission strategy of the first base station is dynamically adjusted according to the actual user distribution and service needs, thereby effectively solving the interference of the first base station to the central area and improving the utilization efficiency of spectrum resources while ensuring full coverage of public broadcast services.

[0036] In this embodiment of the application, the heterogeneous single-frequency network system includes a first base station and a plurality of second base stations. The first base station covers the plurality of second base stations. The target transmission mode of the first base station includes at least one of a first transmission mode and a second transmission mode. The target transmission mode of the second base station includes at least one of an empty mode, a third transmission mode, and a fourth transmission mode. The third transmission mode is configured to transmit basic layer service data and first enhancement layer service data simultaneously. The fourth transmission mode is configured to transmit basic layer service data and second enhancement layer service data. The service content contained in the second enhancement layer service data and the first enhancement layer service data is different. The empty mode is configured to disable data transmission of the second base station.

[0037] The service data includes second enhancement layer service data; the second enhancement layer service data refers to the enhancement layer service data sent by the second base station, carrying differentiated regional service content that differs from the first enhancement layer service data; the empty mode is configured to shut down the data transmission of the second base station, that is, to control the second base station to completely shut down transmission and not send any service data; the target transmission mode of the first base station refers to the final target transmission mode determined for the first base station, that is, to select one from the first transmission mode and the second transmission mode; the target transmission mode of the second base station refers to the final operating mode determined for the second base station, which depends on the selection of the target transmission mode of the first base station, that is, to select one from the third transmission mode, the fourth transmission mode and the empty mode.

[0038] It is understood that when the heterogeneous single-frequency network system of this application consists of a first base station and multiple second base stations distributed within its coverage area, the target transmission mode of the first base station is first selected, and then the target transmission mode of the second base station is determined based on the target transmission mode of the first base station. The target transmission mode of the second base station is one of the third transmission mode, the fourth transmission mode, and the empty mode. According to the selection of different target transmission modes of the first base station, different combinations of the target transmission modes of the first base station and the target transmission modes of the second base station can be obtained. Based on current information and historical information, the final target transmission mode of the first base station and the target transmission mode of the second base station can be determined from the above combinations of transmission modes, realizing the coordinated linkage of the transmission modes of the first and second base stations, realizing the dynamic adjustment of the working strategy of the small tower according to the first enhancement layer service data switching status of the large tower, thereby realizing the efficient reuse of spectrum resources.

[0039] In this embodiment of the application, if the multiple base stations of the heterogeneous single-frequency network system include a first base station and multiple second base stations, the target transmission mode and physical layer channel parameters of each base station are determined based on current information and historical information, including: determining the target transmission mode of the first base station based on current information and historical information; determining the target transmission mode of the second base station based on the target transmission mode of the first base station; and determining the physical layer channel parameters of each base station based on the target transmission mode.

[0040] It is understood that in the heterogeneous single-frequency network system of this application embodiment, if it includes a first base station and multiple second base stations, the target transmission mode is first determined for the first base station based on the real-time measured channel state and the historically accumulated link quality data. Subsequently, based on the transmission mode determined for the first base station, and combined with the coverage and interference conditions of the location of each second base station, an appropriate transmission mode is selected for each second base station in turn. According to the transmission modes finally determined by all base stations, the physical layer channel parameters of each base station are configured one by one, including coding and modulation methods, transmit power and antenna configuration, etc. Through this hierarchical optimization strategy, the coordination of transmission modes between base stations can be ensured, thereby achieving a comprehensive improvement in spectrum efficiency and transmission reliability in the heterogeneous single-frequency network.

[0041] In this embodiment of the application, determining the target transmission mode of the second base station based on the target transmission mode of the first base station includes: if the target transmission mode of the first base station is the first transmission mode, then determining the target transmission mode of the second base station as the fourth transmission mode; if the target transmission mode of the first base station is the second transmission mode, then determining the target transmission mode of the second base station as one of the third transmission mode and the empty mode according to service requirements.

[0042] It is understood that, in this embodiment, the target transmission mode of the first base station is first identified. If the mode is the first transmission mode (i.e., the first base station disables the transmission of the first enhancement layer service data), the target transmission mode of the second base station is determined to be the fourth transmission mode (i.e., the second base station sends the second enhancement layer service data different from that of the first base station). If the target transmission mode of the first base station is the second transmission mode (the first base station enables the transmission of the first enhancement layer service data), the target transmission mode of the second base station is determined to be either the third transmission mode or the empty mode according to the actual service requirements. For example, if the current service requirement is identified as blind spot coverage, the third transmission mode is selected as the target transmission mode of the second base station. The second base station is controlled to send the same first enhancement layer service data as the first base station and transmit with the first base station on the same frequency and in the same frame, thereby achieving blind spot coverage. This realizes the coordinated linkage of the transmission modes of the first and second base stations and enables the dynamic adjustment of the working strategy of the small tower according to the on / off status of the first enhancement layer service data of the large tower, thereby achieving efficient reuse of spectrum resources.

[0043] It is worth mentioning that if the target transmission mode of the first base station is the first transmission mode and the target transmission mode of the second base station is the fourth transmission mode, when the first enhanced layer service data transmission of the first base station is turned off, multiple adjacent second base stations operate in the fourth transmission mode. At this time, the basic layer service data sent by multiple adjacent second base stations is the same as that sent by the first base station, and multiple adjacent second base stations send the same second enhanced layer service data. Since the basic layer service data and the second enhanced layer service data sent by multiple adjacent second base stations are consistent in content and can maintain synchronous transmission in the same frequency and frame, a single-frequency network can be formed by multiple adjacent second base stations in this local area, thereby expanding the effective coverage of the service corresponding to the second enhanced layer service data and improving the continuous coverage capability of the service in the central area.

[0044] It should be noted that there are special cases when the target transmission mode of the first base station is the second transmission mode. Unlike the second base station located in the central area of ​​the first base station, for the second base station located in the edge area of ​​the first base station, due to the greater link loss of the first base station and the weakening strength of the first enhancement layer service data signal of the first base station reaching the terminal in this area, the second base station can switch to the fourth transmission mode when permitted, send its own second enhancement layer service data to provide local enhancement services, and send basic layer service data at the same time, so as to achieve frequency reuse in the edge area under the premise that the first enhancement layer service data of the first base station is enabled.

[0045] In step S103, target control data is sent to each base station to complete the configuration of each base station based on the target control data. Service data is sent to each base station. The base station processes the service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. The service data includes basic layer service data, first enhancement layer service data and second enhancement layer service data.

[0046] The configuration of each base station is based on target control data. This includes receiving the target control data, parsing the instructions contained therein, and accordingly configuring physical layer channel parameters such as selecting the transmission mode, allocating transmit power, determining the coding and modulation scheme, and setting time-frequency interleaving parameters, thereby adjusting itself to the planned working state. The base station processes service data based on the physical layer channel parameters. After receiving service data from the control gateway, the base station first generates control signaling data that needs to be transmitted along with the physical layer signals locally according to the configured physical layer channel parameters. Subsequently, the base station performs coding and modulation, resource mapping, time-frequency interleaving, non-orthogonal multiplexing, and OFDM (Orthogonal Frequency Division Multiplexing) transmission signal generation on the control signaling data and service data, and transmits the corresponding radio frequency signals at a predetermined time and at a designated frequency.

[0047] It should be noted that in this embodiment of the application, the target control data and service data are sent separately. The service data is sent to the first and second base stations after the first and second base stations are configured.

[0048] It is understood that, in this embodiment of the application, target control data including transmission mode selection and physical layer channel parameter configuration is sent to each base station. Each base station completes its own configuration based on this data, and then sends service data to each base station. The service data is processed based on the configured physical layer channel parameters, and the processed service data is sent out according to the determined target transmission mode. The service data includes basic layer service data, first enhancement layer service data, and second enhancement layer service data. By uniformly sending target control data and guiding each base station to complete physical layer configuration and service data processing, coordinated scheduling and precise transmission between the first and second base stations are realized. This ensures that the wide coverage of basic layer services and the regional differentiated services of enhancement layer services can be executed on demand and in an orderly manner, thereby improving the spectrum utilization efficiency and service transmission quality of the entire heterogeneous single-frequency network system.

[0049] In this embodiment of the application, after the base station sends the processed service data based on the target transmission mode, the method further includes: receiving feedback information from the base station based on the target control data; and updating the target transmission mode and the target control data according to the feedback information.

[0050] The feedback information includes periodic feedback information and event feedback information. Periodic feedback information is information that the base station feeds back to the control gateway according to a second preset period. Event feedback information is information that the base station triggers when it detects a target event. The target event includes at least one of the following: target transmission mode switching completed, physical layer channel parameter configuration completed, synchronization abnormality, service data transmission abnormality, hardware failure, change in operating status, terminal reception quality fluctuation exceeding the fluctuation threshold, and receiving a polling request initiated by the control gateway.

[0051] Specifically, periodic feedback information refers to the status report actively reported by the base station at a set pre-set time interval (such as every 1 second or every 10 seconds, which is set according to actual needs and is not specifically limited here); event feedback information refers to the instant reporting information triggered by the base station when it detects the occurrence of a specific target event, which is used to report abnormalities or critical status changes to the control gateway; fluctuation threshold is used to measure whether the fluctuation of the terminal reception quality exceeds the allowable range, which is set according to actual needs and is not specifically limited here.

[0052] It is understood that, in this embodiment of the application, after the base station sends the processed service data based on the target transmission mode, it will also receive information fed back by the base station based on the target control data, so as to dynamically update the target transmission mode and target control data according to this feedback information. Among them, the feedback information includes two types: periodic feedback information and event feedback information. Periodic feedback information is a regular operation status report actively reported by the base station to the control gateway at a preset time interval, while event feedback information is an instant reporting information triggered by the base station when it detects the occurrence of a target event. The target event includes at least one of the following: transmission mode switching completion, physical layer channel parameter configuration completion, synchronization anomaly, service data transmission anomaly, hardware failure, change in operation status, terminal reception quality fluctuation exceeding the fluctuation threshold, and receiving a polling request initiated by the control gateway. By introducing a dual feedback mechanism combining periodic feedback and event feedback, the operation status and abnormal conditions of each base station can be grasped in real time, thereby adjusting the target transmission mode and physical layer channel parameter configuration in a timely manner, realizing closed-loop dynamic optimization, and significantly improving the adaptability and operational stability of the heterogeneous single-frequency network system in complex environments.

[0053] According to the control method for a heterogeneous single-frequency network system proposed in this application, the current and historical information of users within the coverage area of ​​each base station can be obtained through a control gateway. Based on the current and historical information, the target transmission mode and physical layer channel parameters of each base station are determined, and target control data is generated based on the target transmission mode and physical layer channel parameters. The target control data is then sent to each base station to complete the configuration of each base station. The base station processes service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. Different target transmission modes enable layered transmission of service data from different base stations, achieving intelligent scheduling of base stations by the control gateway. This allows the heterogeneous single-frequency network system to dynamically select the target transmission mode of each base station according to the real-time network environment and service requirements, preventing strong signal interference and improving the utilization efficiency of spectrum resources.

[0054] The control method of a heterogeneous single-frequency network system is further described below through a specific embodiment.

[0055] like Figure 3 As shown, this embodiment uses a control gateway to interact with the first and second base stations to exchange target control data and service data. A signal synchronization mechanism provides a unified time and frequency reference for the entire network. This mechanism is similar to that of a traditional single-frequency network, where the single-frequency network adapter periodically inserts second-frame initialization packets containing time information into the data stream output from the service front-end. Simultaneously, the single-frequency network time receiver obtains the reference time and frequency from GPS or BDS, thereby generating and outputting a data stream carrying synchronization information. Subsequently, the control gateway interacts with the first and second base stations to obtain current and historical information such as the cell location, service requirements, and terminal reception conditions of the reference access user or user group. Based on the summarized information... The system constructs a network topology model and predicts the reference number of mobile terminal users under different services. Based on this, it comprehensively compares the performance indicators under different target transmission modes to determine the heterogeneous single-frequency network transmission mode and physical layer channel parameters of the first and second base stations. Then, the control gateway sends corresponding control and signaling data, including information such as heterogeneous single-frequency network transmission mode, transmit power allocation, coding and modulation parameters, and time-frequency interleaving parameters, to multiple first and second base stations in the system according to the determined target transmission mode. Finally, the control gateway sends service data carrying synchronization information to multiple first and second base stations in the system according to the determined target transmission mode.

[0056] like Figure 4 The diagram shows the case where this embodiment only considers a heterogeneous single-frequency network system composed of multiple first base stations.

[0057] The control gateway obtains current and historical information such as cell location, service requirements, and terminal reception conditions of reference access users or user groups within the coverage area of ​​each first base station, constructs a network topology model, determines the transmission mode and service content of each first base station, and sends corresponding control, signaling, and service data to each first base station.

[0058] Each first base station maintains a unified reference time and frequency through the signal synchronization mechanism of the heterogeneous single-frequency network, implementing channel resource scheduling with simultaneous, same-frequency, same-frame structure, and same physical layer sub-channels. Simultaneously, the first base station maintains signaling interaction with the control gateway, receiving target control data from the control gateway. This target control data specifically includes control data and service data. Based on the control data, it configures physical layer channel parameters such as transmission mode, transmit power allocation, coding and modulation parameters, and time-frequency interleaving parameters. Subsequently, based on this physical layer channel parameter configuration, it processes the service data to obtain the first base station's physical layer broadcast signal, which is transmitted at a predetermined time and designated frequency. When necessary, each first base station returns status information or an operation report to the control gateway. Necessary situations mainly refer to two types: periodic reporting and event-triggered reporting. Periodic reporting allows the control gateway to continuously monitor the operational status of the first and second base stations. Event-triggered reporting may include, but is not limited to, situations such as transmission mode switching completion, physical layer channel parameter reconfiguration completion, synchronization anomalies, transmission anomalies, hardware failures, changes in operational status, significant fluctuations in terminal reception quality, or the control gateway initiating a polling request. The meaning of "necessary situations" in the following text is the same as here.

[0059] Each primary base station can switch between two transmission modes: a primary transmission mode and a secondary transmission mode. Basic layer service data remains consistent across all primary base stations, carrying widely covered public broadcasting services (such as national news, emergency broadcasts, basic public service information, and national meteorological information—services with nationwide consistency). Simultaneously, each primary base station can transmit enhanced layer service data, primarily targeting its respective central area. The content may differ, allowing for the carrying of differentiated regional services (such as live broadcasts of local events like marathons and university sports meets).

[0060] like Figure 5 As shown, this embodiment only considers the case where multiple second base stations are distributed within the coverage area of ​​a single first base station. The control gateway acquires current and historical information such as cell location, service requirements, and terminal reception conditions corresponding to the first base station and each second base station within its coverage area, and constructs a network topology model. Based on the network topology model, the control gateway determines the heterogeneous single-frequency network transmission mode, service content, and physical layer channel parameter configuration between the first base station and each cellular second base station, and sends corresponding control, signaling, and service data to the first base station and each cellular second base station.

[0061] The first base station and each of the second base stations maintain a unified reference time and frequency through a signal synchronization mechanism of the heterogeneous single-frequency network, implementing channel resource scheduling with simultaneous, same-frequency, same-frame structure, and same physical layer sub-channels. Specifically, the first base station maintains signaling interaction with the control gateway, receiving control data and service data from the control gateway. Based on the control data, it configures physical layer channel parameters such as heterogeneous single-frequency network transmission mode, transmit power allocation, coding and modulation parameters, and time-frequency interleaving parameters. Then, based on this physical layer channel parameter configuration, it processes the service data to obtain the first base station's physical layer broadcast signal, which is transmitted at a predetermined time and designated frequency. Similarly, each of the second base stations maintains signaling interaction with the control gateway, receiving control data and service data from the control gateway. Based on the control data, it configures physical layer channel parameters such as heterogeneous single-frequency network transmission mode, transmit power allocation, coding and modulation parameters, and time-frequency interleaving parameters. Then, based on this physical layer channel parameter configuration, it processes the service data to obtain the second base station's physical layer broadcast signal, which is transmitted at a predetermined time and designated frequency. If necessary, the first base station and each of the second base stations return status information or operation reports to the control gateway to support the control gateway in dynamically adjusting mode switching and parameter configuration.

[0062] In this scenario, the first base station has a significantly higher transmission power in its central area than each of the second base stations, which will significantly reduce or even disable the enhancement layer service coverage of the second base stations. To adapt to this "high-power, low-power" characteristic in the central area, in this embodiment, the first and second base stations (especially the second base stations in the central area) need to support a combined transmission mode of the first and second base stations, and be uniformly controlled, configured, and switched by the control gateway.

[0063] The first transmission mode combination is "the first base station disables enhanced layer services, and each of the second base stations transmits enhanced layer services." Specifically, the first base station operates in the first transmission mode of the heterogeneous single-frequency network, transmitting only basic layer data services. Each of the second base stations operates in the fourth transmission mode (the basic layer service data is the same as the first base station, but the enhanced layer service data is different). Under this transmission mode combination, there is no longer strong interference from the first base station's first enhanced layer service data to the second base station's second enhanced layer service data in the central area, ensuring that the second enhanced layer service data of each second base station can be received normally in its hotspot area, thus achieving frequency reuse.

[0064] As a special case of the first combination of work modes, such as Figure 6As shown, when the enhanced layer service (EL_A) of the first base station is shut down, multiple adjacent second base stations can simultaneously operate in the fourth transmission mode. At this time, the basic layer service data transmitted by the multiple adjacent second base stations is identical to that transmitted by the first base station, and the multiple adjacent second base stations also transmit the same second enhanced layer service data (EL_B). Since the basic layer service data and second enhanced layer service data transmitted by the multiple adjacent second base stations are identical in content, and can be synchronously transmitted on the same frequency and frame under the control of the control gateway, a single-frequency network can be formed by multiple adjacent second base stations in this local area, thereby expanding the effective coverage of the corresponding enhanced layer service and improving the continuous coverage capability of this service in the central area.

[0065] The second transmission mode combination is "first base station enhanced layer service enabled, second base station in the central area of ​​first base station supplementary transmission". That is, the first base station operates in the second transmission mode of the heterogeneous single-frequency network transmission mode, providing enhanced layer services in the central area. Simultaneously, the control gateway controls any second base station in the central area to switch between two modes according to service requirements: one is that the second base station operates in an empty mode, completely disabled; the other is that the second base station operates in a third transmission mode (both basic layer service data and enhanced layer service data are exactly the same as the first base station), and transmits with the first base station on the same frequency and frame, thus achieving blind spot coverage. Unlike the second base station in the central area, the second base stations located at the edge of the first base station, due to the greater link loss of the first base station and the weakened signal strength of the first enhanced layer service data reaching the terminals in that area, can continue to send their own second enhanced layer service data to provide localized enhanced services when permitted by the control gateway, while simultaneously sending basic layer service data. This allows frequency reuse in the edge area to be achieved even with the enhanced layer service of the first base station enabled.

[0066] For reference, the control gateway's selection between the two transmission modes is based on a frequency multiplexing factor weighted by the number of users in the central area. As an indicator, for any candidate mode, the control gateway first determines which base station transmitters in the central area actually transmit enhancement layer services under that mode (for example, when the first base station enables enhancement layer services, the first base station and the second base station in supplementary mode that transmits the same enhancement layer services as the first base station are considered transmitters; when the first base station disables enhancement layer services, each second base station in the central area that transmits its own enhancement layer services is considered an independent enhancement layer service transmitter). Then, based on user location, terminal reception conditions, and interference intensity, it determines whether users within the coverage area of ​​each transmitter can reach the reception threshold of enhancement layer services under that mode. Users who reach the threshold are counted as "EL users that can be effectively served," and the number of "EL users that can be effectively served" corresponding to transmitter m is denoted as m. The frequency reuse factor, weighted by the number of users, can be obtained by summing the values ​​for all EL users that can be effectively served. Compare different combinations of patterns. Control gateway selection to enable The largest candidate mode is selected as the target mode, and handover control commands and corresponding physical layer channel parameter configurations are sent to the first base station and each of the second base stations, so that the enhancement layer switch and the transmission mode switch of the second base station in the central area are completed at the predetermined handover time, thereby realizing the fusion of the first and second base stations and the spectrum sharing of the central area of ​​the first base station.

[0067] Specifically, to verify the beneficial effects of this embodiment, a composite constellation mapping of 32QAM (32-Quadrature Amplitude Modulation) was selected for link-level mutual information analysis. The basic layer service data uses QPSK (Quadrature Phase Shift Keying) modulation with a code rate of 8448 / 18000, while the enhancement layer service data uses 8QAM (8-Quadrature Amplitude Modulation) modulation with a code rate of 8448 / 13500. Both the basic and enhancement layer service data use 5GNR-LDPC (5G New Radio Low-Density Parity-Check Code) channel coding. The corresponding signal flow diagram is as follows: Figure 7 As shown.

[0068] The receiver simultaneously receives two signals from transmitter A and transmitter B. For ease of description, the transmission link from transmitter A to receiver is defined as the main link, and the transmission link from transmitter B to receiver is defined as the secondary link. Furthermore, the SNR (Signal-to-Noise Ratio) difference is defined. ,in The received signal-to-noise ratio of the main link. The received signal-to-noise ratio (dSNR) of the secondary link is given. To characterize the performance variations of the primary and secondary links under different multi-user interference intensities, the dSNR is set to six cases: infinite, 12dB, 9dB, 6dB, 3dB, and 0dB. Mutual information analysis is performed under two channel models: AWGN (Additive White Gaussian Noise) channel and iid Rayleigh (independent and identically distributed Rayleigh) fading channel. The multi-user detection algorithm is a non-iterative multi-user joint detection algorithm, and the demapping algorithm is Log-MAP (Logarithmic Maximum A Posteriori). To simplify the analysis, this embodiment uses interleaved bits... , or to its corresponding log-likelihood ratio , or The intermediate portion is modeled as a bit-equivalent channel. The link-level system is decomposed into a channel coding / decoding subsystem and a bit-equivalent channel subsystem, and the AMI (Average Mutual Information) of the bit-equivalent channel is calculated. Under the condition of a single receiving antenna, the following results are obtained: Figures 8 to 11 The AMI-SNR performance curve, where Figure 8 AMI-SNR curve of basic layer service data in AWGN channel, Figure 9 AMI-SNR curve of basic layer service data under iid Rayleigh channel Figure 10 The AMI-SNR curve of enhancement layer service data in AWGN channel, Figure 11 The AMI-SNR curves of enhanced layer service data under the iidRayleigh channel are shown in each figure. The six curves in each figure correspond to six different dSNR conditions.

[0069] Since 5G NR-LDPC codes have near-universality, the mutual information threshold for actual 5G NR-LDPC codes and non-ideal LDPC channel decoding can be obtained through empirical formulas: ,in For bitrate, This is the capacity loss factor (obtainable through simulation of the channel coding / decoding subsystem). Based on this, to quantitatively compare the threshold performance under different dSNRs, this embodiment defines the threshold SNR as follows: For basic layer service data (or enhancement layer service data), the threshold value is defined as the minimum SNR required for the AMI of this layer to reach the predicted AMI threshold under a given dSNR. Specifically, let the number of bits corresponding to the modulation order of this layer be... Then the AMI prediction threshold for this layer is The threshold SNR is defined as satisfying The minimum SNR. According to Figures 8 to 11 The mutual information analysis results yield the corresponding SNR thresholds, as shown in Tables 1 to 4.

[0070] Table 1. SNR thresholds for basic layer service data under different dSNR (AWGN, single antenna reception)

[0071] Table 2. SNR thresholds (iid Rayleigh, single-antenna reception) for basic layer service data under different dSNR values.

[0072] Table 3. SNR thresholds for enhancement layer service data under different dSNRs (AWGN, single antenna reception)

[0073] Table 4. SNR thresholds for enhancement layer service data under different dSNRs (iid Rayleigh, single-antenna reception)

[0074] To facilitate the correspondence between the threshold results and typical coverage locations, this embodiment uses the result of dSNR=12dB as a schematic of the central region (indicating that the main link signal strength is significantly greater than the secondary link signal strength), and the result of dSNR=0dB as a schematic of the overlapping region (indicating that the two co-frequency signals have similar strengths and strong interference).

[0075] Under single-receiver antenna conditions, as shown in Tables 1 and 2, the basic layer service data exhibits low reception thresholds in both the central and overlapping regions: In the AWGN channel model, the SNR threshold for BL is 3.90 dB when dSNR=12 dB, and 2.96 dB when dSNR=0 dB; in the iid Rayleigh channel model, the SNR threshold for basic layer service data is 6.26 dB when dSNR=12 dB, and 3.68 dB when dSNR=0 dB. This indicates that the basic layer service data can achieve stable reception in both the central and overlapping regions, thus meeting the wide-area coverage requirements. In contrast, Tables 3 and 4 show that the reception threshold for enhancement layer service data is significantly higher under single-antenna conditions, and it is more difficult to meet the requirements in the overlap region: Under the AWGN channel model, the SNR threshold for enhancement layer service data is 13.90 dB when dSNR=12 dB, while it rises to 25.41 dB when dSNR=0 dB; under the iid Rayleigh channel model, the SNR threshold for enhancement layer service data is 18.25 dB when dSNR=12 dB, while it is approximately 24.25 dB when dSNR=0 dB. Therefore, in the overlap region, it is usually difficult to reliably obtain enhancement layer services using only a single antenna, while basic layer services can still remain available.

[0076] To verify the correctness of the mutual information analysis method based on bit equivalent channel AMI, this embodiment performs link-level simulations under the same parameter settings. Since the basic layer services mainly focus on overlapping area coverage and the enhancement layer services mainly focus on central area coverage, only dSNR=0dB is selected for simulation of basic layer service data, and only dSNR=12dB is selected for simulation of enhancement layer service data. The LDPC (Low-Density Parity-Check) decoding algorithm is layered SPA (Layered Sum-Product Algorithm), with a maximum decoding count of 30. The results are shown in Tables 5 and 6. Comparing the simulation results with the mutual information analysis results, it can be seen that they are basically consistent, verifying the correctness of the analysis method.

[0077] Table 5 Simulation results of SNR threshold for basic layer service data under different channel models (dSNR=0dB, single antenna reception)

[0078] Table 6 Simulation results of SNR threshold for enhancement layer service data under different channel models (dSNR=12dB, single antenna reception)

[0079] Furthermore, to illustrate the high requirements for receiving enhancement layer services in overlapping areas, this embodiment provides the mutual information analysis results of the enhancement layer under dual-receiver antenna conditions (see Tables 7 and 8, listing only the cases of dSNR=12dB and dSNR=0dB). The results show that dual-antenna reception can significantly reduce the reception threshold of enhancement layer service data, enabling terminals in overlapping areas to receive enhancement layer services.

[0080] In summary, receiving enhanced layer services in overlapping areas requires higher receive SNR or higher terminal hardware configuration. Further considering the characteristic that "the power of the first base station is much higher than that of the second base station" in the central area of ​​the first base station, it can be concluded that if the first base station is simultaneously allowed to transmit enhanced layer service data in the central area of ​​the first base station, and the second base stations each transmit enhanced layer service data with different content from the first base station, then the enhanced layer service data of the second base station will suffer not only from fading and noise at the terminal, but also from strong co-channel interference from the enhanced layer service data of the first base station. The equivalent interference condition can be considered as a lower dSNR (possibly even far below 0dB), thus requiring higher receive SNR or higher terminal hardware configuration. This makes it difficult for users within the coverage area of ​​the second base station in the central area of ​​the first base station to meet the enhanced layer reception conditions, and the second base station cannot provide effective enhanced layer services.

[0081] Table 7. SNR threshold analysis results for enhancement layer service data under different channel models (dSNR=0dB, dual-antenna reception)

[0082] Table 8. SNR threshold analysis results for enhancement layer service data under different channel models (dSNR=12dB, dual-antenna reception)

[0083] This embodiment reduces the requirements of the second base station's enhancement layer service data in the central area of ​​the first base station on the receiver's signal-to-noise ratio or terminal hardware configuration by combining the first and second base station modes. When the first base station operates in the first transmission mode, the mutual information analysis results of the second base station's enhancement layer service data are shown in Tables 9 and 10. To characterize the situation where "the power of the first base station is much higher than that of the second base station" in the central area of ​​the first base station, this analysis sets the second base station as the primary link and the first base station as the secondary link, with dSNR set to 0dB, -10dB, -20dB, and -30dB to represent the difference in signal strength between the second base station and the first base station. The analysis results show that under the AWGN channel, when the dSNR further decreases from 0dB to -10dB, -20dB, and -30dB, the SNR threshold of the enhancement layer service data of the second base station does not increase but decreases and tends to stabilize: the threshold is 14.44dB when dSNR=0dB, and about 12.21dB when dSNR=-10dB and lower (the same trend is shown under the iid Rayleigh channel). Therefore, after the enhancement layer service data transmission of the first base station is turned off, the normal reception of the EL service of the second base station can be achieved in the central area of ​​the first base station without additional upgrades to the terminal hardware configuration.

[0084] Table 9. SNR thresholds for the enhancement layer service data of the second base station under different dSNR (AWGN, single antenna reception, first base station EL=0)

[0085] Table 10 SNR thresholds for the enhancement layer service data of the second base station under different dSNR (iid Rayleigh, single antenna reception, first base station EL=0)

[0086] In summary, the beneficial effects of this embodiment are as follows: By controlling the gateway to integrate multiple user service requirements, multiple terminal reception quality feedback, and network topology, performance indicators under different transmission modes are compared, thereby dynamically configuring the transmission modes and physical layer channel parameters (mainly multi-service coding and modulation modes, including transmit power allocation, basic or enhancement layer coding and modulation parameters, time-frequency interleaving parameters, etc.) of the first and second base stations. This achieves a trade-off between frequency utilization and the number of users served, solving the problems of fixed transmission modes in existing heterogeneous single-frequency network systems and limited spectrum sharing between the first and second base stations in the central area of ​​the first base station. When transmitting enhancement layer service data from the first base station is more efficient, the second base station in the central area of ​​the first base station can be constrained not to transmit different enhancement layer service data to avoid the failure of the second base station's enhancement layer service data due to interference from the first base station's signal. When transmitting enhancement layer service data independently by the second base station is more efficient, the transmission of enhancement layer service data from the first base station can be shut down, and the second base station can be allowed to transmit enhancement layer service data independently, thereby improving frequency reuse efficiency. Therefore, this embodiment, while ensuring stable wide-area coverage reception of basic layer service data, achieves the integration of the first and second base stations, the integration of broadcast and communication, and spectrum sharing.

[0087] Next, the control device for a heterogeneous single-frequency network system according to an embodiment of this application is described with reference to the accompanying drawings.

[0088] Figure 12 This is a schematic diagram of the control device for a heterogeneous single-frequency network system according to an embodiment of this application.

[0089] like Figure 12 As shown, the control device of the heterogeneous single-frequency network system includes: an acquisition module 201, a generation module 202, and a distribution module 203.

[0090] The acquisition module 201 is used to acquire the current and historical information of users within the coverage area of ​​each base station; the generation module 202 is used to determine the target transmission mode and physical layer channel parameters of each base station based on the current and historical information, and generate target control data based on the target transmission mode and physical layer channel parameters; the distribution module 203 is used to distribute the target control data to each base station to complete the configuration of each base station based on the target control data, distribute service data to each base station, and the base station processes the service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. The service data includes basic layer service data, first enhancement layer service data, and second enhancement layer service data.

[0091] In this embodiment, the generation module 202 is further configured to: construct a network topology model based on current and historical information; predict the number of users accessing mobile terminals under different services based on the network topology model; determine performance indicators under different transmission modes based on the number of users; and determine the target transmission mode and physical layer channel parameters for each base station based on the performance indicators.

[0092] In this embodiment of the application, a receiving module is further configured to: acquire the heterogeneous single-frequency network signal synchronization mechanism before acquiring the current and historical information of users within the coverage area of ​​each base station; receive the timing signal sent by the global positioning system and acquire the reference time and reference frequency according to the timing signal; and insert a second frame initialization packet containing time information into the output data stream according to the first preset period based on the heterogeneous single-frequency network signal synchronization mechanism to generate and output a data stream carrying synchronization information.

[0093] In this embodiment of the application, the multiple base stations of the heterogeneous single-frequency network system include only multiple first base stations. The transmission modes of the first base stations include a first transmission mode and a second transmission mode. Based on current information and historical information, the target transmission mode of each first base station is determined to be one of the first transmission mode and the second transmission mode. The first transmission mode is configured to disable the transmission of first enhancement layer service data and only transmit basic layer service data. The second transmission mode is configured to transmit basic layer service data and first enhancement layer service data simultaneously.

[0094] In this embodiment, the heterogeneous single-frequency network system includes multiple base stations, including a first base station and multiple second base stations. The first base station covers the multiple second base stations. The target transmission mode includes the target transmission mode of the first base station and the target transmission mode of the second base station. The target transmission mode of the first base station includes a first transmission mode and a second transmission mode. The target transmission mode of the second base station includes an empty mode, a third transmission mode, and a fourth transmission mode. The target transmission mode of the second base station is determined according to the target transmission mode of the first base station. The target transmission mode of the second base station is one of the third transmission mode, the fourth transmission mode, and the empty mode. The third transmission mode is configured to transmit basic layer service data and first enhancement layer service data simultaneously. The fourth transmission mode is configured to transmit basic layer service data and second enhancement layer service data. The service content contained in the second enhancement layer service data and the first enhancement layer service data is different. The empty mode is configured to disable data transmission of the second base station.

[0095] In this embodiment of the application, a determining module is further configured to: determine the target transmission mode of the second base station based on the target transmission mode of the first base station, including: identifying the target transmission mode of the first base station; if the target transmission mode of the first base station is a first transmission mode, then determining the target transmission mode of the second base station as a fourth transmission mode; if the target transmission mode of the first base station is a second transmission mode, then determining the target transmission mode of the second base station as one of a third transmission mode and an empty mode based on service requirements.

[0096] In this embodiment, a feedback module is further included. The feedback module is further configured to: receive feedback information from the base station based on target control data after the base station sends processed service data based on the target transmission mode, so as to update the target transmission mode and target control data according to the feedback information. The feedback information includes periodic feedback information and event feedback information. The periodic feedback information is information fed back by the base station to the control gateway according to a second preset period. The event feedback information is information triggered when the base station detects the occurrence of a target event. The target event includes at least one of the following: target transmission mode switching completion, physical layer channel parameter configuration completion, synchronization abnormality, service data transmission abnormality, hardware failure, change of operating status, terminal reception quality fluctuation exceeding the fluctuation threshold, and receiving a polling request initiated by the control gateway.

[0097] The control device for the heterogeneous single-frequency network system proposed in this application can obtain the current and historical information of users within the coverage area of ​​each base station through a control gateway; determine the target transmission mode and physical layer channel parameters of each base station based on the current and historical information; generate target control data based on the target transmission mode and physical layer channel parameters; and send the target control data to each base station to complete the configuration of each base station based on the target control data. The base station processes service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. By using different target transmission modes, hierarchical transmission of service data of different base stations is achieved, realizing intelligent scheduling of base stations by the control gateway. This enables the heterogeneous single-frequency network system to dynamically select the target transmission mode of each base station according to the real-time network environment and service requirements, preventing strong signal interference and thus improving the utilization efficiency of spectrum resources.

[0098] It should be noted that the foregoing explanation of the control method embodiment for the heterogeneous single-frequency network system also applies to the control device of the heterogeneous single-frequency network system in this embodiment, and will not be repeated here.

[0099] Figure 13 A schematic diagram of the structure of an electronic device provided in an embodiment of this application. The electronic device may include: The memory 301, the processor 302, and the computer program stored on the memory 301 and capable of running on the processor 302.

[0100] When the processor 302 executes the program, it implements the control method of the heterogeneous single-frequency network system provided in the above embodiments.

[0101] Furthermore, electronic devices also include: Communication interface 303 is used for communication between memory 301 and processor 302.

[0102] The memory 301 is used to store computer programs that can run on the processor 302.

[0103] The memory 301 may include high-speed RAM (Random Access Memory) memory, and may also include non-volatile memory, such as at least one disk storage.

[0104] If the memory 301, processor 302, and communication interface 303 are implemented independently, then the communication interface 303, memory 301, and processor 302 can be interconnected via a bus to complete communication between them. The bus can be an ISA (Industry Standard Architecture) bus, a PCI (Peripheral Component Interconnect) bus, or an EISA (Extended Industry Standard Architecture) bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 13 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0105] Optionally, in a specific implementation, if the memory 301, processor 302, and communication interface 303 are integrated on a single chip, then the memory 301, processor 302, and communication interface 303 can communicate with each other through an internal interface.

[0106] Processor 302 may be a CPU (Central Processing Unit), an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement the embodiments of this application.

[0107] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0108] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "N" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0109] Any process or method described in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or N executable instructions for implementing custom logic functions or processes, and the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as should be understood by those skilled in the art to which embodiments of this application pertain.

[0110] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any of the following techniques known in the art, or a combination thereof: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (FPGAs), field-programmable gate arrays (FPGAs), etc.

[0111] Those skilled in the art will understand that all or part of the steps of the methods implementing the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0112] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A control method for a heterogeneous single-frequency network system, characterized in that, The method is applied to the control gateway, which communicates with multiple base stations in the heterogeneous single-frequency network system, wherein the method includes the following steps: Obtain current and historical information of users within the coverage area of ​​each base station; The target transmission mode and physical layer channel parameters of each base station are determined based on the current information and the historical information, and target control data is generated based on the target transmission mode and physical layer channel parameters; The target control data is sent to each base station to complete the configuration of each base station based on the target control data. Service data is sent to each base station. The base station processes the service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. The service data includes basic layer service data, first enhancement layer service data and second enhancement layer service data.

2. The control method for a heterogeneous single-frequency network system according to claim 1, characterized in that, The step of determining the target transmission mode and physical layer channel parameters for each base station based on the current information and the historical information includes: Construct a network topology model based on the current information and the historical information; Predict the number of mobile terminal users accessing different services based on the network topology model. Based on the number of users, performance indicators for different transmission modes are determined, and based on the performance indicators, the target transmission mode and physical layer channel parameters for each base station are determined.

3. The control method for a heterogeneous single-frequency network system according to claim 1, characterized in that, Before obtaining the current and historical information of users within the coverage area of ​​each base station, the process also includes: The reference time and reference frequency are obtained based on the timing signal; The reference time and reference frequency are synchronized according to the synchronization mechanism of the heterogeneous single-frequency network signal.

4. The control method for a heterogeneous single-frequency network system according to claim 1, characterized in that, The heterogeneous single-frequency network system includes multiple base stations, each of which has a first transmission mode and a second transmission mode. The first transmission mode is configured to disable the transmission of the first enhancement layer service data and transmit the basic layer service data. The second transmission mode is configured to transmit the basic layer service data and the first enhancement layer service data simultaneously.

5. The control method for a heterogeneous single-frequency network system according to claim 4, characterized in that, The heterogeneous single-frequency network system includes multiple base stations, including a first base station and multiple second base stations. The first base station covers multiple second base stations. The target transmission mode of the first base station includes at least one of a first transmission mode and a second transmission mode. The target transmission mode of the second base station includes at least one of an empty mode, a third transmission mode, and a fourth transmission mode. The third transmission mode is configured to transmit the basic layer service data and the first enhancement layer service data simultaneously. The fourth transmission mode is configured to transmit the basic layer service data and the second enhancement layer service data. The service content contained in the second enhancement layer service data and the first enhancement layer service data is different. The empty mode is configured to disable data transmission of the second base station.

6. The control method for a heterogeneous single-frequency network system according to claim 5, characterized in that, If the heterogeneous single-frequency network system includes a first base station and multiple second base stations, then determining the target transmission mode and physical layer channel parameters for each base station based on the current information and the historical information includes: The target transmission mode of the first base station is determined based on the current information and the historical information; The target transmission mode of the second base station is determined based on the target transmission mode of the first base station; The physical layer channel parameters for each base station are determined based on the target transmission mode.

7. The control method for a heterogeneous single-frequency network system according to claim 5, characterized in that, Determining the target transmission mode of the second base station based on the target transmission mode of the first base station includes: If the target transmission mode of the first base station is the first transmission mode, then the target transmission mode of the second base station is determined to be the fourth transmission mode; If the target transmission mode of the first base station is the second transmission mode, then the target transmission mode of the second base station is determined to be one of the third transmission mode and the empty mode according to the service requirements.

8. The control method for a heterogeneous single-frequency network system according to claim 1, characterized in that, After the base station sends the processed service data based on the target transmission mode, the method further includes: Receive feedback information from the base station based on the target control data; The target transmission mode and the target control data are updated based on the feedback information.

9. A control device for a heterogeneous single-frequency network system, characterized in that, include: The acquisition module is used to acquire current and historical information of users within the coverage area of ​​each base station; The generation module is used to determine the target transmission mode and physical layer channel parameters of each base station based on the current information and the historical information, and to generate target control data based on the target transmission mode and physical layer channel parameters; The distribution module is used to distribute the target control data to each base station to complete the configuration of each base station based on the target control data, distribute service data to each base station, and the base station processes the service data based on the physical layer channel parameters and sends the processed service data based on the target transmission mode. The service data includes basic layer service data, first enhancement layer service data and second enhancement layer service data.

10. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the control method for the heterogeneous single-frequency network system according to any one of claims 1-8.

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