Method and system for realizing voice and data transmission fusion of EPDT base station

Abstract

The application discloses a kind of EPDT base station voice and data transmission fusion implementation method and system, belong to electric power wireless private network communication technical field, for the technical problem that existing EPDT standard system only faces data transmission design, existing EPDT base station has no standardization professional voice group communication capability, and additional construction independent PDT communication system is needed to realize electric power voice communication.The application transmits mode configuration request to channel control unit by base station main control unit according to network management instruction, channel control unit dynamically loads corresponding EPDT data service or PDT voice service firmware to complete mode switching, different channels work at different carrier frequencies and are physically isolated, and then signal combining and branching processing is completed through radio frequency combining and branching unit, to realize the fusion bearing of two types of services in the same base station hardware platform and the same electric power special frequency band.

Description

Technical Field

[0001] This invention relates to the field of power wireless private network communication technology, and in particular to a method and system for integrating voice and data transmission in an EPDT base station. Background Technology

[0002] The Power Professional Data Transmission (EPDT) series of standards are wireless private network communication specifications developed for the 230MHz dedicated frequency band in the power industry. Their core purpose is to meet the communication requirements of high-reliability, low-latency data transmission in power business scenarios such as new power load management, distribution network automation, and transmission line monitoring. Related base stations and terminal equipment have completed multi-vendor compatibility and interoperability testing and have been piloted and deployed in power grids in multiple locations. The Professional Digital Trunking (PDT) standard is a dedicated communication specification with complete voice trunking communication capabilities. It defines complete voice service functions such as individual calls, group calls, PTT authorization, and handover, forming a mature industry chain system and large-scale industry applications.

[0003] The currently released EPDT standard system focuses on power data transmission as its core design goal, only establishing complete bearer specifications for data services. It lacks defined standards for voice communication, resulting in existing EPDT base stations only supporting power data transmission and unable to directly achieve standardized professional voice trunking communication. The voice communication needs in power emergency command scenarios cannot be met by existing EPDT base stations. To achieve voice communication in power scenarios using existing technologies, an additional independent PDT communication system based on the 400MHz band needs to be constructed. Furthermore, existing technologies do not propose a solution for introducing the PDT voice system onto the same channel hardware platform of the EPDT base station to achieve compatible operation of data and voice services. This lack of flexibility in configuring data and voice channels leads to low spectrum resource utilization efficiency, weak service adaptability, and high construction and maintenance costs. Chinese patent authorization document CN120224179B discloses a method, device, electronic device and storage medium for carrying power voice information. However, this patent can only carry voice data within the single EPDT system framework by modifying the EPDT protocol frame structure. It does not introduce the mature PDT voice system. It cannot reuse the complete voice trunking function and mature industry chain resources of the PDT standard system, nor can it achieve dynamic configuration of data and voice channels on the same hardware platform of the EPDT base station. Furthermore, it cannot solve the technical problem of the coexistence and operation of the EPDT data system and the PDT voice system in the same base station and the same dedicated frequency band. It is difficult to adapt to the communication needs of the power industry for multi-service integration. Summary of the Invention

[0004] The purpose of this invention is to address the problems of existing EPDT standard systems being designed only for data transmission services and existing EPDT base stations lacking standardized professional voice trunking communication capabilities. The invention proposes a technical solution to introduce the PDT voice system into EPDT base stations, enabling EPDT data services and PDT voice services to be integrated and carried on the same base station hardware platform and the same 230MHz dedicated power frequency band, thus allowing EPDT base stations to simultaneously possess standard data transmission and professional voice trunking communication capabilities.

[0005] The purpose of this invention is to solve the technical problem that existing technologies cannot achieve dynamic switching between data and voice modes on the same channel hardware of EPDT base stations. By dynamically loading channel unit firmware, flexible configuration of data and voice channels can be achieved, thereby improving the spectrum utilization efficiency and multi-service scenario adaptability of power wireless private networks.

[0006] The purpose of this invention is to solve the technical problem that existing EPDT base station voice bearer solutions cannot reuse the complete voice trunking function of the PDT standard and mature industry chain resources. By natively introducing the PDT voice system into the EPDT base station, standardized professional voice trunking communication capabilities can be directly realized, thus overcoming the technical difficulties and terminal protocol adaptation obstacles in the implementation of voice services in power wireless private networks.

[0007] This invention proposes a method for integrating voice and data transmission in an EPDT (Electronic Power Grid Display) base station. The method includes: forwarding corresponding operating mode configuration requests to each channel control unit (PDT) according to mode configuration instructions issued by the network management system, through the base station main control unit; dynamically loading firmware for the corresponding EPDT data service or PDT voice service according to the received configuration requests, completing the switching of operating modes, with different channel control units operating on different carrier frequencies and physically isolated; and combining multiple radio frequency signals output from each channel control unit and transmitting them to the antenna unit through a radio frequency combining and splitting unit, and splitting the radio frequency signals received by the antenna unit and distributing them to the corresponding channel control units. This achieves integrated transport of EPDT data services and PDT voice services on the same base station hardware platform and the same dedicated power frequency band, enabling the EPDT base station to simultaneously possess standard data transmission and professional voice trunking communication capabilities without the need for a separate voice communication system.

[0008] Preferably, this method involves the channel control unit completing firmware loading and mode switching, then returning a working mode confirmation response to the base station main control unit. The base station main control unit then determines whether the mode switching was successful based on the received response information. If the switching fails, it re-forwards the working mode configuration request to the corresponding channel control unit. This forms a closed-loop retry mechanism for channel unit mode configuration, effectively ensuring the success rate of channel unit mode switching and preventing a decrease in base station service carrying capacity due to the failure of a single channel unit mode configuration.

[0009] Preferably, this method uses a baseband service processing unit to perform isolated parallel processing of EPDT data services and PDT voice services according to the operating modes of different channel control units. The baseband service processing unit also connects the EPDT data services to the EPDT data service network element of the power core network and the PDT voice services to the PDT voice switching network element of the power core network. This achieves isolated parallel processing and independent connection to the core network for EPDT data services and PDT voice services, ensuring that the two types of services do not interfere with each other during operation and improving the security and reliability of service transmission.

[0010] Preferably, this method involves the base station main control unit configuring the operating frequency band of the channel control unit to the dedicated 230MHz power band according to network management configuration instructions. Specifically, it configures the channel bandwidth of the channel control unit loaded with PDT voice service firmware to 12.5kHz, and the channel bandwidth of the channel control unit loaded with EPDT data service firmware to 25kHz. This achieves compliant coexistence of the two types of services within the dedicated 230MHz power band, and effectively improves the spectrum resource utilization efficiency of the dedicated power band by adapting to the two standard channel bandwidths.

[0011] Preferably, this method receives voice call signaling uploaded by the PDT voice channel control unit through the baseband service processing unit, completing the signaling interaction and authorization verification for call establishment; and performs relay and switching processing on the voice frames transmitted through the voice channel through the baseband service processing unit, completing the end-to-end interaction of voice services. It fully realizes the professional voice trunking communication function of the PDT standard system, without requiring customized protocol modifications to existing standard PDT voice terminals, significantly reducing the difficulty of implementing voice services in power wireless private networks.

[0012] Preferably, this method receives power service data uploaded by the EPDT data channel control unit through the baseband service processing unit, completes corresponding protocol parsing and command verification, and forwards the parsed power service data to the corresponding network element of the power core network through the baseband service processing unit. Simultaneously, it distributes power control commands issued by the core network to the corresponding EPDT data channel control unit. This fully preserves the original high-reliability power data transmission capability of the EPDT base station, ensures the stable operation of power production control services, and achieves synchronous and stable transmission of power data services and voice services.

[0013] Preferably, this method involves the channel control unit sending a working mode configuration request to the base station main control unit after power-on and readiness. The base station main control unit then retrieves pre-stored mode configuration parameters based on the received request and sends a working mode configuration request to the corresponding channel control unit, triggering the channel control unit to complete firmware loading and mode switching. This achieves automatic recovery of the working mode after the channel unit powers on, eliminating the need for manual reconfiguration and effectively improving the continuity, stability, and maintainability of base station operation.

[0014] This invention proposes an EPDT base station voice and data transmission fusion system, applied to the aforementioned EPDT base station voice and data service fusion implementation method. The system includes: a base station main control unit bidirectionally connected to a dual-mode channel control unit cluster and a baseband service processing and switching unit; the dual-mode channel control unit cluster bidirectionally connected to the baseband service processing and switching unit, an RF combiner, and an RF splitter; both the RF combiner and RF splitter are connected to a transceiver duplexer, which is bidirectionally connected to an antenna unit; the dual-mode channel control unit cluster includes EPDT data channel subunits and PDT voice channel subunits capable of dynamically loading corresponding service firmware. Through the coordinated connection of various functional modules and the hardware multiplexing design of the dual-mode channel cluster, the fusion of data and voice services is achieved within the same base station system, simplifying the base station hardware architecture and reducing equipment deployment and maintenance costs.

[0015] Preferably, the system also includes a base station network management configuration module, which is bidirectionally connected to the base station main control unit; the baseband service processing and switching unit is bidirectionally connected to the EPDT data service network element and the PDT voice switching network element of the power core network, respectively. This enables remote and visual configuration and management of the base station's operating mode, and ensures end-to-end independent transmission and processing of data and voice services through independent interface with the two types of service network elements of the core network.

[0016] Preferably, the base station main control unit sends a mode configuration request to the dual-mode channel control unit cluster according to the network management configuration instructions. The EPDT data channel subunit and the PDT voice channel subunit operate on different carrier frequencies and are physically isolated through independent channel hardware, respectively loading EPDT data service firmware and PDT voice service firmware. This achieves flexible configuration of the number of data and voice channels, while avoiding mutual interference between the two types of services through physical isolation design, significantly improving the adaptability and operational stability of the power wireless private network for multiple service scenarios.

[0017] The present invention has the following beneficial effects: 1. This invention enables native compatibility between the EPDT data system and the PDT voice system on the same base station hardware platform, without requiring modifications to the frame structure and bearer specifications of the existing EPDT protocol. It breaks through the technical limitation that existing EPDT base stations can only support data services, enabling EPDT base stations to simultaneously possess standard data transmission and professional voice trunking communication capabilities.

[0018] 2. This invention enables EPDT data services and PDT voice services to coexist and be carried in the same frequency band within the dedicated power frequency band. It eliminates the need to apply for additional dedicated communication frequency bands and deploy two independent base stations, radio frequency and antenna systems, thereby maximizing the reuse of base station hardware resources and spectrum resources.

[0019] 3. By achieving native compatibility with the PDT voice system, this invention can directly reuse the complete professional voice trunking function and mature industry chain resources of the PDT standard system, without the need for customized protocol modifications to existing standard PDT voice terminals, thus significantly reducing the difficulty of implementing power wireless private network voice services and the challenges of terminal adaptation.

[0020] 4. By dynamically loading the channel unit firmware, this invention can flexibly configure the number of data channels and voice channels in the base station according to the actual needs of the power service scenario. At the same time, it can achieve mutual isolation between data services and voice services at the physical channel level, ensuring that the two types of services do not interfere with each other during operation, thereby improving the adaptability and operational stability of the power wireless private network to multiple service scenarios. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the method flow of the present invention.

[0022] Figure 2 This is a timing diagram of the channel unit mode configuration of the present invention.

[0023] Figure 3 This is the timing diagram for the voice service of the present invention.

[0024] Figure 4 This is a time sequence diagram of power business data according to the present invention.

[0025] Figure 5 This is a schematic diagram of the system modules of the present invention.

[0026] Figure 6 This is a schematic diagram of the EPDT base station structure of the present invention. Detailed Implementation

[0027] Example 1 according to Figure 1As shown, this embodiment provides a method for integrating voice and data transmission in an EPDT base station. The method first performs a base station system power-on initialization step, which is the starting point of the entire process and the foundation for ensuring the normal collaborative operation of subsequent functional units. During the base station system power-on process, all functional units within the base station, including the base station main control unit, multiple channel control units, baseband service processing and switching unit, RF combining and splitting unit, transceiver duplexer, and antenna unit, simultaneously complete hardware power-on self-tests and system initialization operations. During the power-on self-test, each unit comprehensively verifies its hardware operating status, firmware storage environment, and communication interface connectivity to ensure that there are no hardware faults and that it can normally receive and execute subsequent control commands and service processing tasks. Simultaneously, after power-on initialization, the base station main control unit establishes a bidirectional communication link with the base station network management configuration module, each channel control unit, and the baseband service processing and switching unit, completing the communication link handshake and parameter synchronization. This establishes a stable and reliable communication channel for subsequent mode configuration and service operation, avoiding link interruptions or data transmission errors during subsequent command transmission and service interaction.

[0028] After the base station system completes power-on initialization, it enters the channel operating mode configuration triggering phase, according to... Figure 2 As shown, in this step, the network management system first issues a channel operating mode configuration command to the base station main control unit. This is the command source for the entire mode configuration process and the core trigger condition for flexible configuration of data and voice channels within the base station. The configuration command issued by the network management system contains the operating mode configuration information corresponding to each channel control unit within the base station, clarifying whether each channel control unit needs to be configured to carry EPDT data services or PDT voice services. After receiving the configuration command from the network management system, the base station main control unit first parses and verifies the legality of the command content to confirm its completeness and validity. At the same time, it records the target operating mode corresponding to each channel control unit, completing the local storage and management of configuration information. This avoids problems such as loss or disorder of configuration information or mis-sent commands in the future, and provides an accurate basis for forwarding configuration requests to channel units in the future.

[0029] After parsing and verifying the configuration instructions, the base station main control unit forwards the corresponding operating mode configuration requests to each channel control unit. Based on the parsed configuration information, the base station main control unit sends a separate operating mode configuration request matching the target operating mode of the channel to each corresponding channel control unit, ensuring that each channel control unit receives accurate configuration instructions tailored to its specific needs, preventing mis-sending or missed instructions. The configuration request sent by the base station main control unit specifies the firmware type that the channel control unit needs to load, as well as basic configuration information such as the corresponding operating frequency band and channel parameters. Simultaneously, during the configuration request sending process, the base station main control unit establishes a dedicated communication session with the corresponding channel control unit to ensure the security and reliability of the configuration request transmission process, preventing the leakage or tampering of configuration information during transmission, and ensuring that the channel control unit accurately receives the expected configuration instructions.

[0030] After receiving the operating mode configuration request from the base station main control unit, each channel control unit performs dynamic firmware loading and operating mode switching operations. This is the core step in solving the pain point of existing EPDT base stations not being natively compatible with the PDT voice system. The channel control unit first parses the received configuration request to determine the type of firmware it needs to load. Then, it retrieves the EPDT data service firmware or PDT voice service firmware corresponding to the configuration request from its local file system and performs the dynamic firmware loading operation to complete the operating mode switching. In this step, the channel control unit uses the same hardware platform, requiring no modification to the hardware circuitry. By simply loading different firmware, the switching between EPDT data service and PDT voice service systems can be achieved. This overcomes the limitation of existing EPDT base station channel units only supporting a single EPDT system. It eliminates the need for additional independent PDT base station hardware equipment and the need to modify the existing EPDT base station hardware architecture, fundamentally solving the pain point of requiring two independent communication systems to simultaneously achieve power data transmission and voice communication in existing technologies. Meanwhile, during the firmware loading process, the channel control unit verifies the integrity and legality of the firmware to ensure that the loaded firmware has not been tampered with and can operate normally and stably. After the firmware loading is completed, the channel control unit will complete the startup and parameter configuration of the corresponding working mode, enabling the channel unit to enter the corresponding working state. At the same time, after completing the mode switching, different channel control units will operate on different carrier frequencies, achieving physical isolation through independent channel hardware. This ensures that EPDT data services and PDT voice services will not interfere with each other during operation. The resources of the two types of services will also be managed separately to prevent service resource contention and ensure the stable operation of both types of services.

[0031] After completing firmware loading and mode switching, the channel control unit (CCU) returns a mode confirmation response to the base station main control unit (BNU). This response includes the CCU's current mode, operating status, and carrier frequency configuration information. Upon receiving the confirmation response, the BNU verifies the information to determine if the firmware loading and mode switching were successful. If the mode switching is successful, the BNU updates the locally stored channel unit's operating status information and includes the channel unit in the normal service operation scheduling scope, providing support for subsequent service processing. If the mode switching fails, the BNU re-forwards the corresponding mode configuration request to the CCU, triggering the CCU to re-execute the firmware loading and mode switching operations. This forms a closed-loop retry mechanism for mode configuration, ensuring that each CCU completes its mode configuration and enters normal operating status, preventing the failure of a single channel unit's mode configuration from affecting the overall base station's service operation capabilities.

[0032] When the channel control unit (CCU) is powered on again, it proactively sends a working mode configuration request to the base station main control unit (BNU) after power-on and startup. Upon receiving this request, the BNU retrieves the pre-stored mode configuration parameters for that CCU and sends the corresponding working mode configuration request back to the CCU, triggering the CCU to re-execute the firmware dynamic loading and working mode switching operations. This process ensures that the CCU automatically restores to the preset working mode after power-on, eliminating the need for manual reconfiguration. This significantly improves the stability and maintainability of base station operation and avoids service interruptions caused by power-off restarts of the CCU, ensuring the continuity of base station services.

[0033] After all channel control units complete mode configuration and enter normal operating state, the base station enters the service parallel processing phase. In this phase, EPDT data services and PDT voice services are processed in isolated parallel manner through their respective channel control units. This is the core aspect of this invention for achieving dual-service convergence. For PDT voice services, according to... Figure 3As shown, the baseband service processing and switching unit receives voice call signaling uploaded by the channel control unit operating in PDT voice mode, and completes the entire process of call establishment signaling interaction and terminal permission verification. Specifically, when a voice terminal initiates a call request, the request is transmitted to the base station main control unit through the PDT voice channel subunit, and then forwarded by the base station main control unit to the voice switching unit. The voice switching unit completes the location search of the called terminal, and then initiates paging to the called terminal through the base station main control unit and the corresponding channel control unit. After receiving the call confirmation returned by the called terminal, the channel allocation between the calling and called terminals is completed. Then, the PTT request initiated by the terminal is processed to complete the authorization and management of the right to speak. After the right to speak is authorized, the baseband service processing and switching unit will perform relay and switching processing on the voice frames transmitted by the voice channel to realize end-to-end interaction of voice services. Meanwhile, by being natively compatible with the PDT voice system, this invention can directly reuse the complete voice trunking function in the PDT standard system without requiring customized protocol modifications to existing PDT standard voice terminals or modifications to the frame structure of the EPDT protocol. This solves the pain points of existing technologies that, when modifying the EPDT frame structure to carry voice, cannot reuse the mature PDT industry chain and complete voice functions, have high terminal adaptation costs, and are difficult to implement.

[0034] Simultaneously and in parallel with the processing of PDT voice services is the baseband processing flow of EPDT data services. These two processes form a parallel service processing link, ensuring that both types of services can operate independently and without interference. Figure 4As shown, for EPDT data services, the baseband service processing and switching unit receives power service data uploaded by the channel control unit operating in EPDT data mode, and completes the parsing and command verification operations of the corresponding protocol. Specifically, when the power service master station issues remote control commands and other power service data, this data is converted into corresponding data paging commands through the power service switching unit and transmitted to the base station master control unit. The base station master control unit initiates data paging to the corresponding data terminal. After receiving the confirmation information returned by the terminal, it completes the allocation of the service channel, and then transmits the service packet data to the target terminal through the corresponding EPDT data channel subunit. After receiving the data reception confirmation returned by the terminal, it completes the end-to-end transmission of power service data and returns remote control command confirmation information to the power service master station. After the service transmission is completed, it completes the release operation of the corresponding channel. In the baseband processing stage, EPDT data services and PDT voice services are processed in parallel through independent processing branches. Their service resources are isolated from each other, and there will be no mutual interference. At the same time, the baseband service processing and switching unit will connect EPDT data services to the EPDT data service network element of the power core network and PDT voice services to the PDT voice switching network element of the power core network, so as to realize the independent connection of the two types of services to the core network and ensure the security and reliability of service transmission.

[0035] After completing baseband service processing, the process moves to the radio frequency (RF) signal processing stage. In this step, the RF combining and splitting unit combines multiple RF signals output from each channel control unit and splits the RF signals received by the antenna unit, enabling shared RF links for both services. For the downlink transmit link, each channel control unit operating in EPDT data mode and PDT voice mode outputs its modulated RF transmit signal to the RF combiner. The RF combiner merges multiple RF transmit signals from different carrier frequencies into a single RF signal, eliminating the need for separate transmit links and antenna systems for data and voice services. This maximizes the reuse of base station RF hardware resources. The combined RF signal is then transmitted to the transceiver duplexer, which performs co-channel / adjacent-channel isolation between the transmit and receive signals, preventing high-power transmit signals from interfering with the high-sensitivity receive channel. The combined transmit signal is then transmitted to the antenna unit, which transmits the RF signal into the wireless space, completing the downlink signal transmission.

[0036] Simultaneously with the downlink transmission link processing, the uplink reception link processing also occurs. For the uplink reception link, the antenna unit receives radio frequency (RF) signals from the wireless space and transmits them to the transceiver duplexer. The transceiver duplexer then transmits the received uplink RF signals to the RF splitter. The RF splitter splits the received full-band RF signals and distributes them to the receiving ports of the corresponding channel control units, ensuring that each channel control unit can receive the uplink RF signal of its corresponding carrier frequency, thus completing the uplink signal reception. Subsequently, each channel control unit demodulates and decodes the received uplink RF signals and transmits the processed service data to the baseband service processing and switching unit, completing the uplink service processing. Through the cooperation of the RF combining and splitting unit and the transceiver duplexer, EPDT data services and PDT voice services share a single RF transceiver link and antenna unit, eliminating the need to deploy two separate antenna feeder systems. This solves the pain points of existing technologies that require building two communication systems, resulting in complex deployment, high hardware costs, and the need for additional frequency resources.

[0037] During the service transmission process at the base station, real-time monitoring of the service execution status is performed simultaneously, based on... Figure 1 As shown, the base station main control unit collects the working status of each channel control unit, the operating status of the two types of service links, and various operating indicators of the radio frequency link in real time. At the same time, it continuously monitors whether the base station network management issues new configuration commands, whether channel unit failures occur, and whether there are significant changes in service load, which may trigger mode reconfiguration. The base station main control unit will analyze and judge the collected status data in real time to determine whether mode reconfiguration operation needs to be triggered, providing a basis for the dynamic adjustment of the base station.

[0038] After completing status monitoring and analysis, the base station main control unit performs a judgment operation to determine whether mode reconfiguration is triggered. If the judgment result indicates that mode reconfiguration is triggered (e.g., the network management system issues a new channel mode configuration command, some channel units malfunction and require channel configuration adjustment, or changes in service load require adjustment of the number of data and voice channels), the base station main control unit will re-receive the channel working mode configuration command issued by the network management system and re-execute the entire process of mode configuration and service operation, realizing dynamic adjustment of base station channel resources. If the judgment result indicates that mode reconfiguration is not triggered, the base station main control unit will continue to perform real-time monitoring of service execution status to ensure the continuous and stable operation of the base station. Through this dynamically configurable mode, the base station can flexibly adjust the number of data and voice channels according to the actual needs of power service scenarios, improving the adaptability of power wireless private networks to multiple service scenarios and solving the pain points of existing EPDT base stations, such as the inability to flexibly configure data and voice channel resources and low spectrum utilization.

[0039] Example 2 This embodiment provides an EPDT base station voice and data transmission fusion system. This system can achieve fusion bearing of EPDT data services and PDT voice services on the same base station hardware platform, without the need for additional deployment of independent communication systems and antenna feeder equipment. According to... Figure 5 As shown, the system mainly includes a base station main control unit, a dual-mode channel control unit cluster, a baseband service processing and switching unit, an RF combiner, an RF splitter, a transceiver duplexer, an antenna unit, and a base station network management configuration module. Each functional module achieves bidirectional communication connection through preset communication interfaces and links, forming a complete service processing and signal transmission link to ensure the stable operation of data and voice services.

[0040] As the core control module of the entire system, the base station main control unit plays a crucial role in command forwarding, status management, and resource scheduling. It establishes bidirectional communication connections with the dual-mode channel control unit cluster and the baseband service processing and switching unit, while also achieving bidirectional data exchange with the base station network management configuration module. This connection allows the base station main control unit to promptly receive configuration commands from the network management system and accurately forward them to the corresponding functional units. Simultaneously, it collects real-time operational status data from each unit, completing status monitoring and anomaly handling. The base station network management configuration module, serving as the system's configuration entry point, issues channel operating mode configuration commands to the base station through bidirectional communication with the base station main control unit. This clarifies key information such as the operating mode, carrier frequency configuration, and bandwidth parameters of each channel control unit. It also receives system operational status data uploaded by the base station main control unit, providing administrators with a visual configuration and monitoring interface for remote control and maintenance of the base station.

[0041] The dual-mode channel control unit cluster is the core distinguishing feature module of this system and the key to solving the pain point of existing technologies where EPDT base stations cannot natively support PDT voice systems. Figure 6As shown, it establishes bidirectional connections with the baseband service processing and switching unit, the RF combiner, and the RF splitter, respectively, and simultaneously receives mode configuration requests from the base station main control unit. The dual-mode channel control unit cluster consists of multiple channel control units with identical structures. Each channel control unit adopts a unified hardware platform, eliminating the need for differentiated hardware circuit design. Mode switching between EPDT data services and PDT voice services can be achieved simply by loading different firmware. This hardware reuse design breaks through the limitation of existing EPDT base station channel units that can only support a single data service. It eliminates the need to deploy separate PDT voice base station hardware, fundamentally solving the problem of needing to build two communication systems to simultaneously realize power data transmission and voice communication in existing technologies. The dual-mode channel control unit cluster includes EPDT data channel subunits and PDT voice channel subunits. These two types of subunits are not physically independent hardware modules, but functional subunits formed by loading different firmware on the same channel control unit hardware. The EPDT data channel subunit loads EPDT data service firmware to carry data services such as telemetry and remote control in the power industry, while the PDT voice channel subunit loads PDT voice service firmware to carry voice communication services in scenarios such as power emergency command.

[0042] During operation, the EPDT data channel subunit and the PDT voice channel subunit are physically isolated through independent carrier frequencies, with their respective service resources managed separately. This prevents resource contention or mutual interference, ensuring the stable operation of both types of services. The bidirectional connection between the dual-mode channel control unit cluster and the baseband service processing and switching unit enables the EPDT data channel subunit to upload collected power service data to the baseband service processing and switching unit for parsing and processing, while simultaneously receiving core network control commands from the baseband service processing and switching unit. The PDT voice channel subunit, on the other hand, transmits call signaling and voice data initiated by voice terminals to the baseband service processing and switching unit, establishing voice calls and relaying voice frames. It also receives call responses and voice data forwarded by the baseband service processing and switching unit, achieving end-to-end interaction for voice services. This connection ensures efficient and accurate transmission of service data and voice data between the channel unit and the baseband unit, providing reliable communication support for the parallel processing of both types of services.

[0043] As key modules for RF signal processing in the system, the RF combiner and RF splitter connect to the dual-mode channel control unit cluster and the transceiver duplexer, respectively, undertaking the tasks of combining and splitting RF signals. The input of the RF combiner is connected to the transmit ports of each channel control unit in the dual-mode channel control unit cluster. It combines multiple RF transmit signals output by multiple channel control units, merging multiple signals with different carrier frequencies into a single RF signal before outputting it to the transceiver duplexer. This design allows multiple channel control units to share a single transmit link and antenna unit, eliminating the need to deploy a separate transmit link and antenna for each channel unit. This significantly simplifies the system's hardware architecture, reduces equipment deployment costs and space occupation, and avoids signal interference problems caused by multiple antenna deployments. The output of the RF splitter is connected to the receiving port of each channel control unit in the dual-mode channel control unit cluster, and its input is connected to the transceiver duplexer. It is used to split the received RF signal transmitted by the transceiver duplexer and distribute it to the receiving port of the corresponding channel control unit according to the signal carrier frequency. This ensures that each channel control unit can accurately receive the signal of the corresponding carrier frequency and complete the demodulation and subsequent processing of the signal. This splitting design ensures that multiple channel units can share a set of receiving links and, together with the combiner, achieves maximum multiplexing of the RF link.

[0044] The transceiver duplexer, a key component connecting the RF combiner, RF splitter, and antenna unit, establishes a unidirectional connection with the RF combiner and splitter while simultaneously achieving a bidirectional connection with the antenna unit. Its core function is to achieve transmit and receive signal isolation, preventing high-power transmit signals from directly entering the receive link and interfering with the high-sensitivity receive channel, thus ensuring the quality and accuracy of the received signal. The transmit signal from the RF combiner to the transceiver duplexer is isolated by the duplexer before being transmitted to the wireless space through the antenna unit. The wireless RF signal received from the antenna unit is isolated and filtered by the duplexer before being transmitted to the RF splitter for splitting. This connection allows the system to achieve both transmit and receive functions with a single antenna, eliminating the need for separate transmit and receive antennas. This further simplifies the system's hardware architecture, reduces the complexity and cost of equipment deployment, and minimizes the space required for antenna deployment, thereby improving the system's practicality and deployment flexibility.

[0045] The antenna unit, serving as the sole interface for signal interaction between the system and the wireless space, establishes a bidirectional connection with the transceiver duplexer. It is responsible for radiating the combined radio frequency (RF) transmission signal into space as radio electromagnetic waves, while simultaneously receiving RF signals from terminal devices and transmitting them back to the transceiver duplexer. The antenna unit is designed to adapt to the dedicated 230MHz frequency band for power applications, enabling efficient transmission and reception of RF signals within this band. This ensures coverage and transmission quality, meeting the needs of outdoor, long-distance communication scenarios in the power industry. Its unidirectional connection with the transceiver duplexer ensures one-way transmission of both transmitted and received signals, preventing signal reflection or interference between the antenna and duplexer, and guaranteeing the stability and reliability of signal transmission.

[0046] As the core service processing module of the system, the baseband service processing and switching unit establishes bidirectional connections with the base station main control unit and the dual-mode channel control unit cluster, as well as bidirectional communication connections with the EPDT data service network element and the PDT voice switching network element of the power core network. This connection enables the baseband service processing and switching unit to achieve service interfacing between the system and the power core network. The EPDT data service network element is specifically designed to handle data service interaction in the power industry, while the PDT voice switching network element is specifically responsible for voice service switching and routing. The independent interfacing design of the two types of network elements ensures that data and voice services can be processed and transmitted independently at the core network level, avoiding mutual interference of service data. At the same time, it can fully utilize the specialized processing capabilities of the core network to improve the efficiency and reliability of service processing. The baseband service processing and switching unit performs isolated parallel processing of received service data according to the working mode of each channel subunit in the dual-mode channel control unit cluster. For EPDT data services, it completes operations such as protocol parsing, instruction verification, and data forwarding, forwarding the power service data uploaded by the terminal to the EPDT data service network element, and simultaneously distributing control instructions issued by the core network to the corresponding EPDT data channel subunit. For PDT voice services, it completes operations such as call signaling interaction, authorization verification, and voice frame relay switching, realizing end-to-end voice communication between voice terminals. This parallel processing mode ensures that data and voice services can operate independently and simultaneously without affecting each other, fully leveraging the system's dual-service carrying capacity.

[0047] During mode configuration, the EPDT data channel subunit and PDT voice channel subunit are configured by the base station main control unit sending a mode configuration request to the dual-mode channel control unit cluster according to network management configuration instructions. This request specifies the firmware type and operating parameters that each channel control unit needs to load. Upon receiving the configuration request, the channel control unit retrieves the corresponding firmware from its local file system and loads it dynamically, completing the mode switch. It then returns a confirmation response to the base station main control unit, which confirms the success of the mode switch based on the response information, forming a complete mode configuration loop. This inter-module linkage allows the system to flexibly configure the number of data and voice channels, adjusting the carrying capacity of the two types of services according to the actual needs of power service scenarios. This solves the pain points of existing EPDT base stations, such as inflexible configuration of service resources and low spectrum utilization. Furthermore, the dynamic firmware loading method enables rapid switching and flexible adjustment of channel unit operating modes, improving the system's adaptability to multiple service scenarios. During operation, each module works collaboratively according to the preset connection relationship and linkage logic. The base station main control unit monitors the operating status of each module in real time and dynamically adjusts resource configuration according to changes in service load and network management instructions to ensure the stable and efficient operation of the system, realizing the converged carrying of EPDT data service and PDT voice service in the same base station system.

[0048] Example 3 This embodiment is the actual configuration implementation of the above-mentioned EPDT base station voice and data transmission fusion system and method. It adopts a combination configuration scheme of 2 EPDT data carriers and 2 PDT voice carriers. Among them, carrier numbers 65 and 66 are EPDT data carriers, which are configured as EPDT control channels and EPDT narrowband service channels, respectively. Carrier numbers 67 and 68 are PDT voice carriers, which are referred to as EPDT voice control channels and EPDT voice service channels for the purpose of unifying the naming system. The actual working mode of the channel unit corresponding to this type of carrier is the voice carrier of the PDT system. After the network management completes the configuration of the above carrier working mode, the base station main control unit sends a mode configuration request to the corresponding channel unit. Each channel unit loads the corresponding EPDT data service firmware and PDT voice service firmware to complete the mode switching. Different carriers operate on different carrier frequencies and achieve physical isolation, so that the base station has the ability to carry two power data services and two professional voice trunking communication simultaneously, which meets the synchronous operation requirements of data transmission and emergency voice communication in power scenarios.

Claims

1. A method for implementing a voice and data transmission fusion of an EPDT base station, characterized in that, The method includes: The base station main control unit forwards the corresponding working mode configuration request to each channel control unit according to the mode configuration instruction issued by the network management system. The channel control unit dynamically loads the firmware corresponding to the EPDT data service or PDT voice service according to the received configuration request, and completes the switching of the working mode. Different channel control units operate on different carrier frequencies and are physically isolated. The radio frequency (RF) combining and splitting unit processes the multiple RF signals output from each channel control unit before transmitting them to the antenna unit, and the RF signals received by the antenna unit are split and distributed to the corresponding channel control unit.

2. The method of claim 1, wherein the EPDT base station voice and data transmission fusion implementation method is characterized by, After the method completes firmware loading and mode switching through the channel control unit, it returns a working mode confirmation response to the base station main control unit. The base station main control unit determines whether the mode switching was successful based on the received response information. If the switching fails, it forwards the working mode configuration request to the corresponding channel control unit again.

3. A method for integrating voice and data transmission in an EPDT base station according to claim 1 or 2, characterized in that, The method uses a baseband service processing unit to perform isolated parallel processing of EPDT data services and PDT voice services according to the working modes of different channel control units. Through the baseband service processing unit, the EPDT data service is connected to the EPDT data service network element of the power core network, and the PDT voice service is connected to the PDT voice switching network element of the power core network.

4. The method of claim 3, wherein the EPDT base station voice and data transmission fusion implementation is characterized by, The method involves the base station main control unit configuring the operating frequency band of the channel control unit to the dedicated 230MHz power frequency band according to the network management configuration instructions, configuring the channel bandwidth of the channel control unit loaded with PDT voice service firmware to 12.5KHz, and configuring the channel bandwidth of the channel control unit loaded with EPDT data service firmware to 25KHz.

5. The method of claim 1 or 2, wherein the EPDT base station voice and data transmission fusion implementation method is characterized by, The method receives voice call signaling uploaded by the PDT voice channel control unit through the baseband service processing unit, and completes the signaling interaction and authorization verification for call establishment; the baseband service processing unit performs relay and switching processing on the voice frames transmitted through the voice channel, and completes the end-to-end interaction of voice services.

6. The method of claim 1 or 2, wherein the EPDT base station voice and data transmission fusion implementation method is characterized by, The method receives power service data uploaded by the EPDT data channel control unit through the baseband service processing unit, and completes the corresponding protocol parsing and instruction verification; The baseband service processing unit forwards the parsed power service data to the corresponding network element of the power core network, and at the same time distributes the power control commands issued by the core network to the corresponding EPDT data channel control unit.

7. The method of claim 1 or 2, wherein the EPDT base station voice and data transmission fusion implementation method is characterized by, The method involves the channel control unit sending a working mode configuration request to the base station main control unit after power-on and startup; the base station main control unit then retrieves the pre-stored mode configuration parameters based on the received request and sends a working mode configuration request to the corresponding channel control unit, triggering the channel control unit to complete firmware loading and mode switching.

8. An EPDT base station voice and data transmission fusion system, the system is applied to the EPDT base station voice and data transmission fusion implementation method of any one of claims 1 to 7, characterized in that, The system includes: The base station main control unit is bidirectionally connected to the dual-mode channel control unit cluster and the baseband service processing and switching unit, respectively. The dual-mode channel control unit cluster is bidirectionally connected to the baseband service processing and switching unit, the radio frequency combiner, and the radio frequency splitter, respectively. Both the RF combiner and the RF splitter are connected to the transceiver duplexer, which is bidirectionally connected to the antenna unit. The dual-mode channel control unit cluster includes an EPDT data channel subunit and a PDT voice channel subunit, which can dynamically load corresponding service firmware.

9. A EPDT base station voice and data transmission converged system according to claim 8, characterized in that, The system also includes a base station network management configuration module, which is bidirectionally connected to the base station main control unit; the baseband service processing and switching unit is bidirectionally connected to the EPDT data service network element and the PDT voice switching network element of the power core network.

10. The EPDT base station voice and data transmission converged system of claim 8, wherein, The base station main control unit sends a mode configuration request to the dual-mode channel control unit cluster according to the network management configuration instruction; the EPDT data channel subunit and the PDT voice channel subunit operate on different carrier frequencies and are physically isolated through independent channel hardware, and respectively load the EPDT data service firmware and the PDT voice service firmware.

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