Power distribution network communication device

Abstract

The invention provides a power distribution network communication device, and relates to the technical field of power communication. The power distribution network communication device comprises a wireless terminal, the wireless terminal at least comprises a first communication module, a first signal processing module and a first wireless transceiver module, the first communication module is used for communicating with a power distribution room service terminal, and the first signal processing module is used for converting a power distribution room service terminal signal and a wireless radio frequency signal; the first wireless receiving and transmitting module is used for receiving and transmitting wireless radio frequency signals; the wireless communication device at least comprises a second communication module, a second signal processing module and a second wireless transceiving module, the second communication module is used for communicating with a power grid background system, and the second signal processing module is used for converting a power grid background system signal and a wireless radio frequency signal; and the second wireless transceiving module is used for transceiving the wireless radio frequency signal. According to the scheme, the problems of high cost, low efficiency, high safety risk and difficulty in capacity expansion of power distribution room communication in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the field of power communication technology, and in particular to a power distribution network communication device. Background Art

[0002] With the rapid economic development, the demand for electricity in all walks of life is increasing, which has brought great challenges to the reliability of power supply of the power distribution lines of the power grid. The power distribution room contains multiple terminals such as metering and distribution concentrators, TTU, load control, DTU / FTU, etc. How to ensure the real-time communication between many business terminals and the power grid backend master system efficiently, safely and at low cost is of great significance. At present, the communication of power distribution terminals in the power room has the following problems in terms of expansion and new construction:

[0003] (1) Deployment cost and efficiency issues: In the process of converting the existing power distribution terminal operator's wireless public network 4G communication method to the power optical cable transmission method, multiple network cables need to be laid between the power distribution network switch and the distribution terminal, which has high construction costs and large investment.

[0004] (2) Personal safety risks: During the process of laying network cables, the route needs to pass through the cable trench in the high-voltage room, which poses a safety risk of electric shock. It is necessary to report a power outage plan and go through the power outage procedures. The construction process is complicated, the progress is slow, and the cost is high.

[0005] (3) Difficulty in subsequent capacity expansion: Each time a new distribution terminal is added, a power outage plan must be reported and power outage procedures must be completed, which seriously affects the project progress and greatly increases the investment cost.

[0006] (4) Limitations of traditional wireless communication technology: The distribution room uses traditional wireless communications such as wifi and ROLA, which have short transmission distance, weak anti-interference ability and poor data transmission security.

[0007] Currently, no effective solution has been proposed for the above technical problems. Summary of the invention

[0008] The main purpose of the present invention is to provide a power distribution network communication device to solve the problems of high cost, low efficiency, high safety risk and difficulty in capacity expansion in distribution room communication in the prior art.

[0009] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a power distribution network communication device, comprising: a wireless terminal, the wireless terminal at least comprising a first communication module, a first signal processing module and a first wireless transceiver module, the first communication module being used to communicate with a distribution room business terminal, the first signal processing module being used to convert distribution room business terminal signals and wireless radio frequency signals, and the first wireless transceiver module being used to transmit and receive wireless radio frequency signals; a wireless communication device, the wireless communication device at least comprising a second communication module, a second signal processing module and a second wireless transceiver module, the second communication module being used to communicate with a power grid background system, the second signal processing module being used to convert power grid background system signals and wireless radio frequency signals, and the second wireless transceiver module being used to transmit and receive wireless radio frequency signals.

[0010] Furthermore, the frequency of the wireless radio frequency signal is p, 223 MHz≤p≤235 MHz.

[0011] Furthermore, the wireless terminal and the wireless communication device perform wireless communication based on the 3GPP protocol and the NB+LoT Internet of Things protocol standard.

[0012] Furthermore, the second communication module includes a power private network wired communication module and an operator network communication module.

[0013] Furthermore, there are multiple business terminals in the power distribution room and multiple wireless terminals, and the wireless terminals and the business terminals in the power distribution room are arranged in a one-to-one correspondence.

[0014] Furthermore, the first signal transceiver module includes an antenna, and the first communication module includes at least a serial port communication module and a network port communication module.

[0015] Furthermore, the first signal processing module is at least used to perform the following signal processing: signal encoding, signal decoding, signal modulation, signal demodulation, signal encryption, and signal decryption.

[0016] Furthermore, the second signal processing module includes: a baseband processing module, the baseband processing module is at least used to perform the following signal processing: signal encoding, signal decoding, signal modulation, signal demodulation, signal encryption, and signal decryption, and the baseband processing module is electrically connected to the second communication module; a radio frequency processing module, the radio frequency processing module is electrically connected to the second wireless transceiver module, the radio frequency processing module is used to convert the received wireless radio frequency signal into a baseband signal, and the radio frequency processing module is used to convert the baseband signal from the baseband processing module into a wireless radio frequency signal; an intermediate frequency processing module, the intermediate frequency processing module is arranged between the baseband processing module and the radio frequency processing module, and the intermediate frequency processing module is used to perform signal frequency modulation.

[0017] Furthermore, the wireless communication device also includes: a power amplifier module, which is electrically connected to the radio frequency processing module, and is used for performing signal amplification processing.

[0018] Furthermore, the wireless communication device includes: a power module, the power module is used to provide power to the second communication module, the second signal processing module and the second wireless transceiver module, and the power module is used to provide at least one of the following power supplies: 28V / 40W power supply, 12V / 71W power supply and 48V / 25W power supply.

[0019] By applying the technical solution of the present invention, wireless communication between the distribution room business terminal and the power grid background system is realized through the setting of wireless terminals and wireless communication devices, the data collection and transmission process of the distribution terminal is optimized, the inefficiency caused by wiring is reduced, the need for cable laying and maintenance is greatly reduced, the construction and maintenance costs are reduced, and the personal safety risks that may be caused by wiring in a high-voltage environment are avoided, thereby improving the safety of the operation; signal conversion and processing are performed between the wireless terminal and the wireless communication device to ensure the integrity and security of the data in a wireless environment, and effectively prevent the data from being unauthorizedly accessed or tampered with; by setting the first wireless transceiver module and the second wireless transceiver module, the anti-interference ability of the signal is enhanced, ensuring that the wireless communication of the power distribution network can remain stable and reliable even in a complex electromagnetic environment; at the same time, due to the modular design of the wireless terminal and the wireless communication device, the power distribution network system can be easily expanded and upgraded without rewiring, which simplifies the access process of the distribution room business terminal and enhances the scalability and adaptability of the entire communication system. This solution solves the problems of high cost, low efficiency, high safety risk and difficult expansion of distribution room communication in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic structural diagram of an embodiment of a power distribution network communication device according to the present invention is shown;

[0022] Figure 2 It shows a network topology diagram of an embodiment of a distribution room service terminal 230M wireless network access group according to the present invention;

[0023] Figure 3 A software structure diagram of an embodiment of a 230M wireless communication device according to the present invention is shown;

[0024] Figure 4 A schematic diagram showing the deployment of an embodiment of an EPC subsystem of the software part of a 230M wireless communication device according to the present invention;

[0025] Figure 5A schematic diagram showing the deployment of an embodiment of a wireless control subsystem of the hardware part of a 230M wireless communication device according to the present invention;

[0026] Figure 6 An architectural diagram showing an embodiment of the hardware part of a 230M wireless communication device according to the present invention;

[0027] Figure 7 A schematic diagram showing the deployment of an embodiment of a power module subsystem of the hardware part of a 230M wireless communication device according to the present invention;

[0028] Figure 8 A schematic diagram showing the deployment of an embodiment of a baseband processing subsystem of the hardware part of a 230M wireless communication device according to the present invention;

[0029] Fig. 9 A schematic diagram showing the deployment of an embodiment of an intermediate frequency hardware subsystem of the hardware part of a 230M wireless communication device according to the present invention;

[0030] Fig.10 A schematic diagram showing the deployment of an embodiment of a radio frequency transceiver subsystem of the hardware part of a 230M wireless communication device according to the present invention;

[0031] Fig.11 A schematic diagram showing the deployment of an embodiment of a power amplifier unit subsystem of the hardware part of a 230M wireless communication device according to the present invention;

[0032] Fig.12 A schematic structural diagram of a first embodiment of a 230M wireless communication device according to the present invention is shown;

[0033] Fig.13 A schematic structural diagram of a second embodiment of a 230M wireless communication device according to the present invention is shown;

[0034] Fig.14 A schematic structural diagram of a third embodiment of a 230M wireless communication device according to the present invention is shown;

[0035] Fig.15 A schematic structural diagram of a fourth embodiment of a 230M wireless communication device according to the present invention is shown;

[0036] Fig.16 A schematic diagram showing an embodiment of a communication method between a power distribution room service terminal and a power grid backend system according to the present invention is shown. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0041] Combination Figure 1 As shown, according to a specific embodiment of the present application, a power distribution network communication device is provided.

[0042] The power distribution network communication device includes a wireless terminal and a wireless communication device. The wireless terminal includes at least a first communication module, a first signal processing module and a first wireless transceiver module. The first communication module is used to communicate with the business terminal of the distribution room, the first signal processing module is used to convert the business terminal signal of the distribution room and the wireless radio frequency signal, and the first wireless transceiver module is used to send and receive wireless radio frequency signals; the wireless communication device includes at least a second communication module, a second signal processing module and a second wireless transceiver module. The second communication module is used to communicate with the power grid background system, the second signal processing module is used to convert the power grid background system signal and the wireless radio frequency signal, and the second wireless transceiver module is used to send and receive wireless radio frequency signals.

[0043] By applying the technical solution of this embodiment, the wireless communication between the distribution room business terminal and the power grid background system is realized through the setting of the wireless terminal and the wireless communication device, the data collection and transmission process of the distribution terminal is optimized, the inefficiency caused by wiring is reduced, the need for cable laying and maintenance is greatly reduced, the construction and maintenance costs are reduced, and the personal safety risks that may be caused by wiring in a high-voltage environment are avoided, and the safety of the operation is improved; the signal conversion and processing are performed between the wireless terminal and the wireless communication device to ensure the integrity and security of the data in the wireless environment, and effectively prevent the data from being unauthorized access or tampering; by setting the first wireless transceiver module and the second wireless transceiver module, the anti-interference ability of the signal is enhanced, ensuring that the wireless communication of the power distribution network can remain stable and reliable even in a complex electromagnetic environment; at the same time, due to the modular design of the wireless terminal and the wireless communication device, the power distribution network system can be easily expanded and upgraded without rewiring, which simplifies the access process of the distribution room business terminal and enhances the scalability and adaptability of the entire communication system. This solution solves the problems of high cost, low efficiency, high safety risk and difficult expansion of distribution room communication in the prior art.

[0044] Specifically, the frequency of the wireless radio frequency signal is p, 223MHz≤p≤235MHz. The selection of this frequency band not only avoids interference with other wireless communication systems, but also provides good penetration and coverage, which is particularly suitable for indoor environments such as power distribution rooms, ensuring that the communication device can work stably even in complex electromagnetic environments, thereby improving the reliability of power distribution network communication.

[0045] Preferably, p is 230 MHz.

[0046] Furthermore, the wireless terminal and the wireless communication device communicate wirelessly based on the 3GPP protocol and the NB+LoT Internet of Things protocol standard. The combined use of these two protocols can not only achieve low-power, wide-coverage communication, but also provide high-speed data transmission, adapting to the remote monitoring and data collection needs of the power distribution network, especially in remote areas or large-scale power grids, which can significantly improve communication efficiency and data processing capabilities.

[0047] Specifically, the second communication module includes a wired communication module for the power private network and a communication module for the operator network. The dual-mode communication design can not only take advantage of the stability and security of the power private network, but also take advantage of the wide coverage and high-speed transmission of the operator network to provide double protection for power distribution network communication. It is suitable for power distribution network scenarios that require high reliability and high data transmission rate, such as power dispatching, fault detection and load management.

[0048] Furthermore, there are multiple business terminals in the power distribution room and multiple wireless terminals, and the wireless terminals are set one-to-one with the business terminals in the power distribution room. The one-to-one setting method can ensure the communication quality and data security of each business terminal in the power distribution room. When applied to a power distribution network system with a large number of business terminals and a wide distribution, such as the power distribution network in large commercial areas, industrial parks and residential areas, it can achieve accurate monitoring and management of each power equipment.

[0049] In an exemplary embodiment of the present application, the multiple distribution room service terminals include at least a metering terminal, a load control terminal, an electric energy meter, a distribution terminal, a transformer terminal unit TTU, a feeder terminal unit FTU, and a distribution terminal unit DTU.

[0050] Specifically, the first signal transceiver module includes an antenna, and the first communication module includes at least a serial port communication module and a network port communication module. The design of the antenna and the diversified design of the communication module can adapt to the communication needs of different business terminals, ensure the stable transmission of signals, and are suitable for scenarios that require communication with different types of business terminals, such as communication with smart meters, power monitoring equipment, and power automation equipment, and can realize the comprehensive intelligence of the power distribution network.

[0051] Furthermore, the first signal processing module is at least used to perform the following signal processing: signal encoding, signal decoding, signal modulation, signal demodulation, signal encryption, and signal decryption. Diversified signal processing can not only improve the efficiency of data transmission, but also ensure the security of communication. It is suitable for power distribution network communication scenarios that need to process large amounts of data and ensure data security, such as real-time transmission of power data and remote control of power equipment, and can effectively prevent data tampering and communication interference.

[0052] Among them, the second signal processing module includes a baseband processing module, a radio frequency processing module and an intermediate frequency processing module. The baseband processing module is at least used for the following signal processing: signal encoding, signal decoding, signal modulation, signal demodulation, signal encryption, and signal decryption. The baseband processing module is electrically connected to the second communication module; the radio frequency processing module is electrically connected to the second wireless transceiver module, and the radio frequency processing module is used to convert the received wireless radio frequency signal into a baseband signal, and the radio frequency processing module is used to convert the baseband signal from the baseband processing module into a wireless radio frequency signal; the intermediate frequency processing module is arranged between the baseband processing module and the radio frequency processing module, and the intermediate frequency processing module is used to perform signal frequency modulation. The multi-level signal processing architecture can effectively improve the signal processing capability and communication quality, and is suitable for power distribution network systems that need to process complex signals and realize long-distance communication, such as cross-regional power distribution network communication, and can realize efficient signal conversion and stable transmission.

[0053] Furthermore, the wireless communication device also includes a power amplifier module, which is electrically connected to the radio frequency processing module and is used to perform signal amplification processing. The setting of the power amplifier module can significantly enhance the transmission distance and penetration ability of the wireless signal, and is suitable for power distribution network communications that need to cover a wide area or complex environment, such as dense areas of urban power grids and complex terrains of mountain power grids, and can ensure stable signal transmission and improve communication reliability.

[0054] Furthermore, the wireless communication device includes a power module, which is used to provide power to the second communication module, the second signal processing module and the second wireless transceiver module, and the power module is used to provide at least one of the following power supplies: 28V / 40W power supply, 12V / 71W power supply and 48V / 25W power supply. The diversified design of the power module can adapt to the power supply requirements of different power distribution networks, and is suitable for scenarios where the power supply is unstable or flexible power supply is required, such as emergency power distribution networks and mobile power distribution networks. It can ensure the normal operation of the communication device in various environments and improve the adaptability and stability of the power distribution network.

[0055] According to another specific embodiment of the present application, a wireless communication access method for a power distribution network is also provided, including: the metering or distribution terminal in the distribution room is connected to the 230M wireless terminal through a serial port or a network port; the data collected by the metering or distribution terminal in the distribution room is sent to the 230M wireless communication device through a 230M wireless signal; after the southbound air interface of the 230M wireless communication device receives the 230M signal, the data is restored through demodulation, encoding, decryption, etc. (the reverse data communication process is similar); after the data is restored, according to the transmission configuration method of the northbound interface of the device, the wired method of the power private network or the 4 / 5G operator network is selected to be transmitted back to the power grid background system.

[0056] The wireless communication access method of the power distribution network in this embodiment can be applied to the metering of the distribution room or the data transmission business scenario of the remote FTU distribution business terminal. Taking the metering and FTU terminal in the distribution room as an example, Figure 2 This is a network topology diagram of a power room metering and distribution terminal in an embodiment of the present invention that securely accesses the power network through a 230M wireless network. Figure 2 As shown, the metering terminal in the distribution room or the remote distribution terminal FTU is connected to the 230M wireless terminal through a serial port or a network port; the data collected by the metering or remote distribution terminal FTU in the distribution room is sent to the 230M wireless communication device through a 230M wireless signal; after the southbound air interface of the 230M wireless communication device receives the 230M signal, the data is restored through demodulation, encoding, decryption, etc. (the reverse data communication process is similar); after the data is restored, according to the transmission configuration method of the northbound interface of the device, the wired method of the power private network or the 4 / 5G operator network is selected to be transmitted back to the power grid background system.

[0057] Specifically, Fig.16 As shown, the power grid backend system can be a metering automation master station system, and the distribution room terminal can be a concentrator. The concentrator is equipped with a 230 concentrator communication module (i.e., a wireless terminal). Each concentrator can simultaneously collect data information of multiple electricity meters. The concentrator transmits information to a 230 intelligent gateway (i.e., a 230M wireless communication device) via a 230M wireless signal. The base station can choose any of the 4 / 5G operator networks and integrated data networks to transmit signals to the metering automation master station system.

[0058] According to another specific embodiment of the present application, a 230M wireless communication device is also provided, which can realize the above-mentioned wireless communication access mode of the power distribution network together with the relevant 230M wireless terminal. The 230M wireless communication device includes software and hardware parts.

[0059] Specifically, Figure 3As shown, the software part of the 230M wireless communication device includes: platform subsystem, EPC subsystem, wireless control subsystem, transmission subsystem, baseband subsystem and RF subsystem. Among them, the platform subsystem can provide platform basic support functions, equipment management, version management, local operation and maintenance, performance monitoring, traffic statistics, etc.; the EPC subsystem can be responsible for UE mobility management, user status management, authentication and path management, session management, etc.; the wireless control subsystem is mainly the control plane of the protocol stack, completing signaling control, docking with EPC, etc.; the transmission subsystem is used to provide the physical interface between the base station and the transmission network, and to complete the user plane data interaction with the data network, and also provides a maintenance channel connected to the eOMC; the baseband subsystem is implemented by the baseband module, completes the uplink and downlink data baseband processing function, and provides a CPRI interface for communication with the RF subsystem; the RF subsystem is used to complete the modulation and demodulation of RF signals and baseband signals, data processing, combining and splitting, receiving and transmitting RF signals, etc.

[0060] In a preferred embodiment of the present application, the platform subsystem includes the following specific functions:

[0061] Timer, which implements one-shot timer and cycle timer with millisecond precision, mainly used to implement the state machine function of module interaction;

[0062] Network communication framework, which realizes inter-process communication, supports cross-platform and cross-system migration, and has the advantages of low latency, high performance, and high reliability;

[0063] Resource management: manage resource usage and provide allocation and release functions;

[0064] Memory management, to achieve unified memory management, reduce memory fragmentation and improve performance;

[0065] The debugging function provides data collection, recording and analysis including command line debugging commands, various debugging information and signaling / business messages of system interactions. It is one of the important auxiliary means to analyze, locate and solve bugs during integration testing, system testing and on-site debugging.

[0066] The system interface encapsulation provides an API that shields the differences in operation between systems, including tasks, semaphores, message queues, etc., and can support the upper-level application software (including protocol stack software and other application layer software) to run on Windows and Linux platforms.

[0067] High security, using a variety of technologies to check whether there is illegal or unauthorized access to the device or system, resist malicious attacks such as ARP spoofing and illegal remote control, and ensure the high security of the system.

[0068] Configuration management function: Provides a standard interface to IMC so that IMC can complete configuration management functions for managed objects in BBU, including object creation / deletion, object attribute parameter acquisition and modification, etc.

[0069] Fault management function, completes alarm detection and reporting of alarm information, supports alarm information logging and supports uploading of alarm logs.

[0070] The performance management function provides a standard interface to the IMC so that the IMC can obtain certain types of performance measurement indicators of the eNodeB through the FTP server.

[0071] Software management function, complete software version query, backup, update, activation and rollback functions.

[0072] The asset management function provides the IMC with information about each hardware module of the BBU hardware unit, such as hardware version number, manufacturer, product serial number, processor information, etc.

[0073] Message tracking management: create / delete message tracking flows and implement operations such as uploading and deleting tracking messages.

[0074] Log management, universal log management interface, flexible level and module switch control, supports one-click collection of log information.

[0075] In a preferred embodiment of the present application, Figure 4 As shown, the deployment of the EPC subsystem mainly includes EMS module deployment, MME module deployment, HSS module deployment, SGW module deployment, PGW module deployment and DP module deployment.

[0076] Among them, the EMS modules are deployed as follows: EMS processing module, including AM, PM, CM, and MNT modules, which are connected to various business modules and are responsible for functions such as alarm, performance, configuration, and maintenance management; SNMP module, including SNMP-trapd process, is responsible for reporting alarms to the network management; back-end module, including httpd process and Web_Agent module, is responsible for connecting to the Web browser; DB module deployment, as a database module, is used to store configuration data, alarm data, and performance data managed by EMS, and store UE subscription data managed by HSS module.

[0077] Among them, the MME module is deployed as follows: Mgmt module, responsible for connecting to the EMS processing module, cooperating with EMS to complete the configuration management, performance management, alarm management, maintenance management and other functions related to the MME module; protocol stack (GTPC, Diameter, S1AP, SCTP), the protocol stack is presented in the form of a library to implement the encoding and decoding of control plane messages and state machine maintenance; S1 module, responsible for connecting to the wireless subsystem, managing the S1 logical link process of eNB and UE, and forwarding UE messages to the UE control module; UE control module, responsible for processing the network access control, mobility management, security, and bearer management of UE.

[0078] Among them, the HSS module is deployed as follows: Mgmt module, responsible for connecting to the EMS processing module, cooperating with EMS to complete the configuration management, performance management, alarm management, maintenance management and other functions related to the HSS module; protocol stack (Diameter, SCTP): the protocol stack is presented in the form of a library to realize the encoding and decoding of control plane messages and state machine maintenance; S6a module, responsible for connecting to the MME module, responsible for S6a interface message distribution; business processing module, responsible for UE authentication vector generation and UE contract data management; DB API, database operation interface API, presented in the form of a library.

[0079] Among them, the SGW module is deployed as follows: Mgmt module, responsible for connecting to the EMS processing module, cooperating with EMS to complete the configuration management, performance management, alarm management, maintenance management and other functions related to the SGW module; protocol stack (GTPC), the protocol stack is presented as a library to realize the encoding and decoding of control plane messages and state machine maintenance; service processing module, responsible for UE access session management;

[0080] Among them, the PGW module is deployed as follows: Mgmt module, responsible for connecting to the EMS processing module, cooperating with EMS to complete the configuration management, performance management, alarm management, maintenance management and other functions related to the SGW module; protocol stack (GTPC): the protocol stack is presented in a library to realize the encoding and decoding of control plane messages and state machine maintenance; business processing module: responsible for UE session management and UE IP allocation management.

[0081] Among them, DP module deployment: runs in the kernel and is responsible for UE user plane data forwarding and routing.

[0082] In a preferred embodiment of the present application, Figure 5 As shown, the deployment of the wireless control subsystem is as follows:

[0083] OAM-MASTER process (including PFM, FM, Trace, Pcap, Clkm and other processes);

[0084] The RDM-MASTER process is used to shield OAM from RRU-related commands and baseband, and to provide cell and baseband relationship functions;

[0085] GTPU process, GTPU-C and GTPU-U will not be split for the time being;

[0086] The advantage of the RRM process is that the MML configuration does not require slot numbers for differentiation, and OAM-CM is simple;

[0087] Overall deployment of the RRC process.

[0088] OAM-AGENT process (including ltelog process);

[0089] The RDM-BU process mainly inherits the functions of the original RDM, and the cell-related processes are also mainly handled by this process;

[0090] LTELAYER2 process: A single L2 process supports three cells and needs to start three scheduling threads.

[0091] PHY SE (exclusive).

[0092] In a preferred embodiment of the present application, the transmission subsystem is used to provide a physical interface between the base station and the transmission network, and to complete user plane data interaction with the data network, while providing a maintenance channel connected to the eOMC; it supports transmission functions such as UDP, TCP, IPSec, SCTP, GTPU, etc., among which the main transmission protocols are as follows:

[0093] GTP-U: GTP-U protocol is used to transmit user data of IOT-G S1 / X2 interface, in accordance with 3GPP TS29.281; GTP-U Tunnel is composed of IP address and TEID (Tunnel Endpoint Identifier) ​​to carry a wireless service. Different TEIDs can be used for uplink / downlink of a tunnel.

[0094] SCTP: SCTP is built on the IP layer and is a signaling bearer protocol for the IOT-G (S1 / X2) interface. It implements connection-oriented reliable transmission by establishing an SCTP association between two peer SCTP terminals.

[0095] IPSec: IPsec (IP Security) is a three-layer tunnel encryption protocol developed by IETF. It provides high-quality cryptographic-based security guarantees for data transmitted on the Internet. It is a traditional security technology for implementing a three-layer VPN (Virtual Private Network). IPsec protects user data transmitted between specific communication parties by establishing a "channel" between them (for example, between two security gateways). This channel is usually called an IPsec tunnel.

[0096] In a preferred embodiment of the present application, the baseband subsystem is implemented by a baseband module, which completes the uplink and downlink data baseband processing functions and provides a CPRI interface for communicating with the radio frequency subsystem, and is deployed as follows: forward error correction (FEC) encoding / decoding of the transmission channel; hybrid automatic repeat request (HARQ) soft combining; rate matching of the coded transmission channel and the physical channel; mapping of the coded transmission channel and the physical channel; power weighting of the physical channel; modulation and demodulation of the physical channel; frequency and time synchronization; multiplexing and channel coding; generation of physical signals such as primary and secondary synchronization signals, OFDM, and reference signals; inter-layer mapping and downlink precoding; power control process; random access process; physical downlink shared channel related processes; physical uplink shared channel related processes, including UE detection and hybrid automatic repeat request (HARQ) positive acknowledgement (ACK) / negative acknowledgement (NACK) detection; physical shared control channel process, including shared control channel allocation; measurement process of idle mode and connected mode; frequency hopping and packet frequency hopping; multi-antenna technology, supporting 1 or 2 transmitting antenna ports, and supporting 1 or 2 receiving antenna ports.

[0097] Specifically, Figure 6 As shown in FIG. 1 , the hardware part of the 230M wireless communication device includes: a power module subsystem, a baseband processing subsystem, an intermediate frequency hardware subsystem, a radio frequency transceiver subsystem, a power amplifier unit subsystem, and a duplexer subsystem. Fig.12 As shown in the figure, the actual hardware components of the 230M wireless communication device include the baseband RF board, power amplifier board, and duplexer. Specifically, the upper cover of the 230M wireless communication device is the duplexer, and the lower cover is the power module, the baseband RF board and the power amplifier board. The connection relationship is as follows Fig.13 As shown. Among them, the RF board in the baseband specifically includes four parts: power subsystem, baseband processing subsystem, intermediate frequency hardware subsystem, and RF transceiver subsystem. The hardware part of the 230M wireless communication device is specifically introduced as follows:

[0098] The power module and the RF board in the baseband are on a single board, which supplies power to the entire system, monitors the input voltage and output voltage status, and reports alarm information to the RF part in the baseband. The RF part in the baseband can shut down the 48V / 28V output power of the power module by monitoring the system status; the power amplifier board adopts a castle-style design process, and the power amplifier module in the integrated large board is independently designed into a small board and connected to the large board by welding. The pin feet are used to transmit the power supply, control signal and RF signal of the power amplifier board. The control signal realizes the gate voltage and shutdown enable functions on the power amplifier board. The RF signal is the RF signal such as transmission, reception, feedback and reflection between TRX and the power amplifier. The power amplifier board and the filter are connected through the QMA connector.

[0099] In a preferred embodiment of the present application, Figure 7 As shown, the power module subsystem mainly provides a DC-48V power input interface for the base station system, and converts the DC-48V voltage into 28V and 12V to power the TRX board and the amplifier board. It also provides a 48V POE power supply RJ45 interface. The power supply works in a windless environment, with self-cooling and heat dissipation, and the operating temperature range of the whole machine is -40 to 55°C. The power input voltage range is -37V to -60V. The power supply has three outputs, 28V / 40W (modification of some devices can support 48V output), 12V / 71W and POE 48V / 25W, with a total output rated power of 136W. The power supply has input undervoltage, output overvoltage, overcurrent, overtemperature and other protection functions.

[0100] The specific deployment of the power module subsystem is as follows: DC 5KA lightning protection, the design adopts the first-level protection, and adopts the TVS tube + gas discharge tube combination protection; EMI filtering, conduction radiation requirements to meet the system class B, using two-stage common mode inductor for EMI filtering; slow start, using the amplification area characteristics of MOS as a slow start-up boot; anti-reverse connection, using the characteristics of MOS body diode, cut off when reverse connection, closed when normally connected; main power part, 12V uses forward active clamp circuit, the control IC uses LM5025A from TI manufacturer, and at the same time taps a winding on the 12V transformer as 28V output, and then outputs 28V through BUCK step-down, thus reducing the transformer for 28V output, saving space, cost and improving efficiency; POE output, meeting the 802.3at protocol, the control IC uses PD69101 chip; auxiliary power supply, using linear voltage regulation, when the main circuit starts, the internal power supply is provided by its own auxiliary winding; input sampling, input current and voltage are reported through IIC; protection function, with input undervoltage protection and alarm, output overvoltage protection, overcurrent protection, short circuit protection, overtemperature protection function; power remote control, can control the power on and off and 28V output voltage regulation function through the host computer IIC.

[0101] In a preferred embodiment of the present application, the baseband processing subsystem is mainly divided into baseband data processing, clock processing, 4G / 5G module backhaul processing, etc. Figure 8 As shown, the specific deployment of the baseband processing subsystem is as follows:

[0102] The baseband processing SOC uses MARVELL's CNF7xxx series platform baseband processor CNF7345, which can be applied to metropolitan areas and large-area base stations. CNF7345 includes a CPU part, a DSP part, and an accelerator part. The CPU part includes 10 MIPS cores (single thread) with a main frequency of up to 1.2GHz. The DSP part includes 8 vector DSP cores + 1 vector soft-bit DSP core with a main frequency of up to 800MHz. The accelerator part includes 14 configurable LTE / WCDMA / GSM hardware accelerators and supports 10G SERDES interface. The DSP and hardware accelerator are mainly responsible for LTE / WCDMA L1 processing and realize IQ data exchange of CPRI interface. The CPU is mainly responsible for L2 and above business processing to realize network communication, data storage, etc.

[0103] The CNF7345 DDR4 memory capacity requirement is 8GB. It uses 1 DDR4 controller, 2 chip selects, and is designed with (8+2) DDR4 chips (1GB each) (with ECC 72bit). The storage of operating system files and business data requires a non-volatile memory capacity of 16GB, which is designed with eMMC chips.

[0104] The 4G / 5G module backhaul processing circuit mainly completes the services of 230 base stations and performs service backhaul through the 4G LTE or NR module air interface. It is mainly connected to the module through the service interface PCIE / USB / GPIOs of the CPU processor, and adopts a circuit compatible design of 4G LTEminiPCIE interface and 5G NR M.2 interface.

[0105] In a preferred embodiment of the present application, Fig. 9As shown in the figure, the specific deployment of the intermediate frequency hardware subsystem is as follows: it is used to realize the digital link front-end processing function of the base station radio frequency system, receive the IQ signal sent by the baseband processor, perform uplink and downlink modulation and demodulation, and send the modulated and demodulated IQ signal to the radio frequency link for processing. The main functions of the link include: CPRI serial data transmission and analysis, DUC (digital up conversion), CFR (peak clipping), DPD (digital pre-distortion), DDC (digital down conversion), power control, etc.; it is responsible for the clock distribution of the entire system unit, including the working clock of the FPGA, the reference clock of the high-speed seders interface and the reference clock of the RFIC; it is responsible for transmitting the data converted by the RFIC high-speed ADC and DAC; it is responsible for the control interface of the radio frequency and PA unit, as well as the communication interface with the baseband BBU, including the SGMII and Bootbus interfaces; the power subsystem provides power for the intermediate frequency hardware, radio frequency small signal, and PA subsystem, and controls the power-on and power-off timing of the entire board, while realizing the monitoring and control of the external power module.

[0106] In a preferred embodiment of the present application, Fig.10 As shown, the RF transceiver subsystem mainly performs RF modulation and demodulation on the baseband IQ signal of the intermediate frequency part, and interconnects with the power amplifier for transceiver transmission, specifically including the transmission link, the receiving link, the feedback link and the frequency synthesis.

[0107] Specifically, the transmission link mainly converts the digital baseband signal from the BBU into an analog signal, then up-converts it to the RF, amplifies it, and sends it to the next-level PA for power amplification. The feedback link is mainly used for output power monitoring, automatic power control, standing wave detection, DPD correction, etc. of the entire RRU. The receiving link mainly filters, amplifies, down-converts, and converts the weak useful signal received by the antenna port to the baseband for demodulation. The frequency synthesis is mainly the LO link used to provide LO signals to the TX IQ modulator, FB mixer, and RX mixer.

[0108] In a preferred embodiment of the present application, Fig.11 As shown in the figure, the power amplifier unit subsystem mainly realizes the RF small signal amplification (PA) at the transmitting end and the small signal low noise amplification (LNA) at the receiving end. The specific functions of the power amplifier unit subsystem include: digital control of the power amplifier tube gate voltage; single board voltage, current and temperature detection; transmission link power amplification; receiving link low noise amplification; forward and reflected power detection. The power amplifier board welding adopts the castle process.

[0109] In an exemplary embodiment of the present application, the structure of the 230M wireless communication device is as follows: Fig.14 , 15Preferably, the wireless communication device 230 has a size of 343mm x 227mm x 88mm, a weight of 4.75kg, and is mounted on a wall or on a pole.

[0110] In an exemplary embodiment of the present application, the 230M wireless communication device has multiple interface structures. Specifically, the interface types are shown in Table 1 below:

[0111] Table 1:

[0112]

[0113] In a preferred embodiment of the present application, the 230M wireless communication device is also provided with a product indicator light, and the meaning of the indication of the product indicator light is shown in Table 2 below.

[0114] Table 2:

[0115]

[0116] The wireless communication access method and wireless communication device of the power distribution network in this application solve the problems of high deployment cost, low efficiency, high risk of electric shock, and poor subsequent scalability of existing wired communications in distribution rooms. It also solves the problems of short transmission distance, weak anti-interference ability, and poor data transmission security of traditional wireless communications such as wifi and ROLA in distribution rooms.

[0117] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0118] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0119] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0120] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0121] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A power distribution network communication device, characterized in that: include: A wireless terminal, the wireless terminal at least comprising a first communication module, a first signal processing module and a first wireless transceiver module, the first communication module is used to communicate with the power distribution room service terminal, the first signal processing module is at least used to convert the power distribution room service terminal signal and the wireless radio frequency signal, and the first wireless transceiver module is used to send and receive the wireless radio frequency signal; A wireless communication device, the wireless communication device at least includes a second communication module, a second signal processing module and a second wireless transceiver module, the second communication module is used to communicate with the power grid background system, the second signal processing module is at least used to convert the power grid background system signal and the wireless radio frequency signal, and the second wireless transceiver module is used to send and receive the wireless radio frequency signal.

2. The power distribution network communication device according to claim 1, characterized in that: The frequency of the wireless radio frequency signal is p, 223 MHz≤p≤235 MHz.

3. The power distribution network communication device according to claim 1 or 2, characterized in that: The wireless terminal and the wireless communication device perform wireless communication based on the 3GPP protocol and the NB+LoT Internet of Things protocol standard.

4. The power distribution network communication device according to claim 1 or 2, characterized in that: The second communication module includes a power private network wired communication module and an operator network communication module.

5. The power distribution network communication device according to claim 1, characterized in that: There are multiple business terminals in the power distribution room, and there are multiple wireless terminals, and the wireless terminals are arranged in a one-to-one correspondence with the business terminals in the power distribution room.

6. The power distribution network communication device according to claim 1, characterized in that: The first signal transceiver module includes an antenna, and the first communication module includes at least a serial port communication module and a network port communication module.

7. The power distribution network communication device according to claim 1, characterized in that: The first signal processing module is used to perform at least the following signal processing: signal encoding, signal decoding, signal modulation, signal demodulation, signal encryption, and signal decryption.

8. The power distribution network communication device according to claim 1, characterized in that: The second signal processing module comprises: A baseband processing module, the baseband processing module is at least used to perform the following signal processing: signal encoding, signal decoding, signal modulation, signal demodulation, signal encryption, and signal decryption, and the baseband processing module is electrically connected to the second communication module; A radio frequency processing module, the radio frequency processing module is electrically connected to the second wireless transceiver module, the radio frequency processing module is used to convert the received wireless radio frequency signal into a baseband signal, and the radio frequency processing module is used to convert the baseband signal from the baseband processing module into the wireless radio frequency signal; An intermediate frequency processing module is provided between the baseband processing module and the radio frequency processing module, and is used for performing signal frequency modulation.

9. The power distribution network communication device according to claim 8, characterized in that: The wireless communication device further comprises: A power amplifier module is electrically connected to the radio frequency processing module, and is used for signal amplification.

10. The power distribution network communication device according to claim 1, 8 or 9, characterized in that: The wireless communication device comprises: A power supply module, the power supply module is used to provide power to the second communication module, the second signal processing module and the second wireless transceiver module, and the power supply module is used to provide at least one of the following power supplies: 28V / 40W power supply, 12V / 71W power supply and 48V / 25W power supply.

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