Subway network dedicated wireless cluster interconnection and intercommunication system based on SIP (Session Initiation Protocol)

Abstract

The invention relates to the technical field of subway communication, and discloses an SIP (Session Initiation Protocol)-based special wireless cluster interconnection and intercommunication system for a subway network, which comprises a hardware component and a software component, the hardware component comprises an SIP (Session Initiation Protocol) server, an SIP scheduling terminal, an Internet gateway and a TETRA (Terrestrial Transport Radio Access) system or a broadband cluster The software assembly comprises an SIP protocol stack, signaling conversion and interaction software and management and configuration software. According to the special wireless cluster interconnection and intercommunication system for the subway network based on the SIP protocol, by introducing the SIP standard protocol, the technical barrier is successfully broken through, comprehensive interconnection and intercommunication of multiple brands of TETRA and broadband cluster systems are achieved, a fixed station does not need to be used for transferring, the communication efficiency and quality are remarkably improved, meanwhile, the system keeps the structural integrity of an original system, and the service life of the system is prolonged. The method simplifies the configuration process, reduces the cost, has strong expandability, and supports the seamless access of a new line in the future.

Description

Technical Field

[0001] The present invention relates to the technical field of subway communication, and in particular to a dedicated wireless cluster interconnection system for subway lines based on the SIP protocol. Background Art

[0002] In subway communication systems, dedicated wireless trunking systems play a vital role as the core communication means for train dispatching and command. Currently, most subway systems use the 800MHz frequency band TETRA digital trunking system as the main wireless communication solution, and some advanced systems have begun to adopt LTE or 5G broadband trunking systems. These systems come from various brands, including Airbus, Motorola, and Far East Communications (HBFEC), each with its own unique communication protocols and technical characteristics.

[0003] Currently, there are no widely adopted, successful examples of truly seamless interoperability between multi-brand TETRA systems or broadband trunking systems. This situation significantly limits user experience and hinders the networking and intelligent development of the urban rail transit industry. Existing interconnection solutions often employ terminal-level interconnection based on direct fixed-station connections. This solution requires the installation of fixed stations in the overlapping wireless signal coverage areas of the two system base stations, and physical connection via specific connecting lines (such as 4-wire E&M lines). The fixed stations act as a bridge between the two systems, forwarding call requests for specific call groups via air interface protocols to enable cross-network roaming and group calling. However, this solution has significant drawbacks: call data must be transferred through the fixed stations, resulting in significantly increased call latency and severely impacting call quality. Furthermore, the installation and maintenance costs of fixed stations are high, and they are difficult to adapt to the increasingly complex communication needs of subway networks. Therefore, the present invention provides a dedicated wireless trunking interconnection system for subway networks based on the SIP protocol. Summary of the Invention

[0004] (1) Technical problems solved In response to the shortcomings of the existing technology, the present invention provides a dedicated wireless cluster interconnection system for subway lines based on the SIP protocol, which has the advantages of efficient interconnection, simplified configuration process, and strong scalability, solving the problems of insufficient interconnection efficiency, complex configuration process, and poor scalability.

[0005] (2) Technical solution To achieve the above-mentioned goals of efficient interconnection, simplified configuration process, and strong scalability, the present invention provides the following technical solutions: A dedicated wireless cluster interconnection system for subway lines based on the SIP protocol, including hardware components and software components; The hardware components include a SIP server, a SIP dispatch terminal, an Internet gateway, a TETRA system or a broadband trunking system; The software components include SIP protocol stack, signaling conversion and interaction software, and management and configuration software.

[0006] As a preferred technical solution of the present invention, the subway line network dedicated wireless cluster interconnection system is equipped with SIP servers, SIP dispatch terminals, Internet gateways and other line-level equipment in the line network center, and is connected to each TETRA system or broadband system through an IP interface.

[0007] As a preferred technical solution of the present invention, the SIP server and the Internet gateway perform signaling conversion and interaction for the terminal status, call records, dynamic reorganization, scheduling monitoring and other signaling of different systems, thereby realizing cross-line individual calls, cross-line group calls, cross-line short data, cross-line scheduling and other service interconnection functions between the entire network.

[0008] As a preferred technical solution of the present invention, the system functions include cross-system interconnection, low-latency and high-quality calls, flexible configuration and management, and scalability. Among them, system-level interconnection realizes interconnection from the system level, reduces call delay, and improves call quality without changing the original system structure. The configuration is simple and flexible, and supports seamless access to subsequent newly built lines without brand or standard restrictions.

[0009] As a preferred technical solution of the present invention, the SIP protocol stack in the software component includes a SIP protocol conversion module. The core of this technology is to seamlessly convert the proprietary protocol signaling of various brands of TETRA digital trunking systems or broadband trunking systems into the signaling of the SIP (Session Initiation Protocol) standard protocol. This module can accurately identify and parse the voice control signaling and short data control signaling in the proprietary protocol, and convert them into RFC3261 voice call signaling and RFC3428 short data signaling defined in the SIP standard protocol.

[0010] As a preferred technical solution of the present invention, the software component also includes an Internet gateway design with a built-in intelligent routing algorithm that can automatically select the optimal path for signaling forwarding based on factors such as signaling type and priority. In addition, the Internet gateway also adopts a modular design.

[0011] As a preferred technical solution of the present invention, part of the software components includes management and configuration software, which provides an intuitive user interface, allowing users to complete system configuration, interconnection group settings, roaming user mapping table management and other tasks through graphical operations. At the same time, the software also has built-in rich help documents and online support functions, which makes it convenient for users to quickly obtain help when encountering problems during use. In addition, the management and configuration software also has powerful logging and analysis functions, which can monitor the system operation status in real time.

[0012] (3) Beneficial effects Compared with the existing technology, the present invention provides a dedicated wireless cluster interconnection system for subway lines based on the SIP protocol, which has the following beneficial effects: This SIP-based subway network-specific wireless cluster interconnection system has successfully broken through technical barriers by introducing the SIP standard protocol, achieving comprehensive interconnection between multi-brand TETRA and broadband cluster systems without relying on fixed-station relays, significantly improving communication efficiency and quality. At the same time, the system maintains the integrity of the original system structure, simplifies the configuration process, reduces costs, and has strong scalability, supporting seamless access to new lines in the future. Regardless of the technical standards used, this innovative design greatly promotes information sharing, collaborative operations and emergency response in the subway network, providing an efficient, flexible and low-cost solution for network operations, and significantly improving overall operational efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the terminal-level interconnection solution based on fixed-station direct connection of the present invention; Figure 2 This is a schematic diagram of the SIP-based subway network dedicated wireless cluster interconnection system of the present invention. DETAILED DESCRIPTION

[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0015] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0016] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0017] See also Figure 1-2 , Example 1: A dedicated wireless cluster interconnection system for a subway line network based on the SIP protocol, including hardware components and software components; The hardware components include a SIP server, a SIP dispatch terminal, an internet gateway, and a TETRA system or a broadband trunking system. The SIP server is responsible for signaling conversion and interaction and is the core device for system interconnection. The SIP dispatch terminal is used to manage and dispatch communications between systems and provides a user interface and operation interface. The internet gateway connects TETRA systems or broadband systems of different brands to achieve cross-system communication. Existing communication systems in the TETRA system or broadband trunking system subway network are interconnected through the SIP server.

[0018] It should be noted that the system uses encryption technology to protect the secure transmission of signaling and data to prevent unauthorized access and information leakage.

[0019] The software components include the SIP protocol stack, signaling conversion and interaction software, and management and configuration software. The SIP protocol stack implements the conversion and encapsulation of RFC3261 voice call signaling and RFC3428 short data signaling of the SIP standard protocol. The signaling conversion and interaction software runs on the SIP server and internet gateway, and is responsible for converting the proprietary protocol signaling of each system into SIP standard protocol signaling and interacting with it. The management and configuration software is used to configure interconnection groups, roaming user mapping tables, etc., and manage the operating status and parameters of the system.

[0020] In this embodiment, the system architecture is as follows Figure 2As shown in the figure, the dedicated wireless trunking interconnection system for the subway network is equipped with network-level equipment such as SIP servers, SIP dispatch terminals, and Internet gateways in the network center, and is connected to various TETRA systems or broadband systems through IP interfaces. The SIP servers and Internet gateways perform signaling conversion and interaction for signaling such as terminal status, call records, dynamic reorganization, and dispatch monitoring of different systems, thus realizing cross-line individual calls, cross-line group calls, cross-line short data, cross-line dispatch and other service interconnection functions across the entire network.

[0021] In this embodiment, system functions include cross-system interconnection, low-latency, high-quality calls, flexible configuration and management, and scalability. System-level interconnection achieves interconnection at the system level, reduces call delays, and improves call quality without changing the original system structure. Configuration is simple and flexible, and supports seamless access to newly built lines without brand or standard restrictions. Cross-system interconnection achieves full-function interconnection between TETRA systems or broadband systems of different brands through the SIP protocol, eliminating the need for signal relay through fixed stations. Low-latency, high-quality calls are directly interconnected at the system level, reducing call delays and improving call quality. Flexible configuration and management eliminates the need to change the original system structure, requiring only the configuration of the same country code, roaming call group, and individual users, and configuring a mapping table in the SIP server. Scalability ensures that newly built lines, regardless of brand or standard, can achieve interconnection by accessing the wireless trunking system according to the SIP standard protocol.

[0022] Embodiment 2 also includes SIP protocol conversion within the SIP protocol stack in the software component. The core of this technology is to seamlessly convert the proprietary protocol signaling of each brand's TETRA digital trunking system or broadband trunking system into the signaling of the SIP (Session Initiation Protocol) standard protocol. Through in-depth analysis of the proprietary protocols of each system, a dedicated protocol conversion module is designed and implemented. This module can accurately identify and parse the voice control signaling (such as call establishment, call termination, etc.) and short data control signaling (such as status update, short message transmission, etc.) in the proprietary protocol, and convert them into RFC3261 voice call signaling and RFC3428 short data signaling defined in the SIP standard protocol, laying a solid foundation for achieving seamless interconnection between systems of different brands.

[0023] In this embodiment, the software components also include an internet gateway design that can process massive amounts of signaling data from various systems in real time. It also has a built-in intelligent routing algorithm that can automatically select the optimal path for signaling forwarding based on factors such as signaling type and priority. In addition, the internet gateway adopts a modular design to facilitate functional expansion and performance upgrades based on actual needs. Through this internet gateway, signaling between systems of different brands can be transmitted quickly and accurately, ensuring the real-time and reliability of communication between systems.

[0024] In this embodiment, part of the software components includes management and configuration software, which provides an intuitive user interface and allows users to complete system configuration, interconnection group settings, roaming user mapping table management and other tasks through graphical operations. At the same time, the software also has built-in rich help documents and online support functions, which makes it convenient for users to quickly obtain help when encountering problems during use. In addition, the management and configuration software also has powerful logging and analysis functions, which can monitor the system operation status in real time and provide strong support for system maintenance and troubleshooting. Through this software, users can easily achieve flexible configuration and efficient management of the system.

[0025] Beneficial effects of the above embodiments: This SIP-based subway network-specific wireless cluster interconnection system has successfully broken through technical barriers by introducing the SIP standard protocol, achieving comprehensive interconnection between multi-brand TETRA and broadband cluster systems without relying on fixed-station relays, significantly improving communication efficiency and quality. At the same time, the system maintains the integrity of the original system structure, simplifies the configuration process, reduces costs, and has strong scalability, supporting seamless access to new lines in the future. Regardless of the technical standards used, this innovative design greatly promotes information sharing, collaborative operations and emergency response in the subway network, providing an efficient, flexible and low-cost solution for network operations, and significantly improving overall operational efficiency.

[0026] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A dedicated wireless cluster interconnection system for subway lines based on the SIP protocol, including hardware components and software components; Features: The hardware components include a SIP server, a SIP dispatch terminal, an Internet gateway, a TETRA system or a broadband trunking system; The software components include SIP protocol stack, signaling conversion and interaction software, and management and configuration software.

2. According to claim 1, a subway line network dedicated wireless cluster interconnection system based on the SIP protocol is characterized by: The subway line network dedicated wireless trunking interconnection system is equipped with SIP servers, SIP dispatch terminals, Internet gateways and other line-level equipment in the line center, and is connected to each TETRA system or broadband system through an IP interface.

3. According to claim 2, a subway line network dedicated wireless cluster interconnection system based on the SIP protocol is characterized by: Through the SIP server and Internet gateway, the terminal status, call records, dynamic reorganization, scheduling monitoring and other signaling of different systems are converted and interacted, realizing the interconnection and interoperability of cross-line individual calls, cross-line group calls, cross-line short data, cross-line scheduling and other business functions between the entire network.

4. According to claim 1, a subway line network dedicated wireless cluster interconnection system based on the SIP protocol is characterized by: System functions include cross-system interconnection, low-latency high-quality calls, flexible configuration and management, and scalability. Among them, system-level interconnection realizes interconnection at the system level, reduces call delays, and improves call quality without changing the original system structure. The configuration is simple and flexible, and it supports seamless access to subsequent newly built lines without brand or standard restrictions.

5. According to claim 1, a subway line network dedicated wireless cluster interconnection system based on the SIP protocol is characterized by: The SIP protocol stack in the software component includes a SIP protocol conversion. The core of this technology is to seamlessly convert the private protocol signaling of each brand of TETRA digital trunking system or broadband trunking system into the signaling of the SIP (Session Initiation Protocol) standard protocol. This module can accurately identify and parse the voice control signaling and short data control signaling in the private protocol, and convert it into RFC3261 voice call signaling and RFC3428 short data signaling defined in the SIP standard protocol.

6. According to the SIP protocol-based subway network dedicated wireless cluster interconnection system of claim 1, it is characterized by: The software components also include an Internet gateway design with a built-in intelligent routing algorithm that can automatically select the optimal path for signaling forwarding based on factors such as signaling type and priority. In addition, the Internet gateway also adopts a modular design.

7. According to claim 1, a subway line network dedicated wireless cluster interconnection system based on SIP protocol is characterized by: Part of the software components includes management and configuration software, which provides an intuitive user interface that allows users to complete system configuration, interconnection group settings, roaming user mapping table management and other tasks through graphical operations. At the same time, the software also has built-in rich help documents and online support functions, which allows users to quickly get help when they encounter problems during use. In addition, the management and configuration software also has powerful logging and analysis functions, which can monitor the system operation status in real time.

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