A dispatching intercommunication system based on digital trunking

Abstract

The present invention relates to a dispatching and intercommunication system based on digital clusters, and belongs to the technical field of digital cluster communications. The switching centers and interconnected base station devices of multiple TETRA systems are respectively connected through a dispatching interface, one end of the interconnected base station device is connected to the base station of the opposite TETRA system through a wireless air interface, and the other end is connected to the switching center of the local TETRA system through an IP interface. The interconnected base station device realizes the horizontal interconnection and intercommunication function between multiple TETRA systems of different manufacturers, supports multi-way calls between systems, and supports cross-system terminal roaming, single call, group call, short data and other horizontal interconnection functions. The dispatching console realizes the vertical dispatching functions of single call, group call, short data, multi-select group call, dynamic reorganization, remote stun and kill, dispatch call and other TETRA systems of multiple different manufacturers through the dispatching interface.

Description

Technical Field

[0001] The present invention belongs to the technical field of digital cluster communication, and in particular relates to a scheduling intercommunication system based on digital cluster. Background Art

[0002] TETRA digital trunking communication systems are mostly used for wireless dispatching of urban rail transit. Urban rail transit has also entered the stage of interconnection, unified operation and unified dispatching at the line network level from independent operation of different lines.

[0003] Realizing the interconnection and interoperation of rail transit lines at the network level, and cross-line and co-line operation between different lines, is a technical high ground that the industry is eager to conquer. Among them, the interconnection and interoperability of wireless train dispatching systems is an important part of line network-level operations. However, in the urban rail transit wireless dispatching system, there are many challenges such as the difficulty of interconnection and interoperability between TETRA systems of different manufacturers, insufficient closure of network architecture, and closed system interconnection interfaces. These are not conducive to achieving resource sharing and reducing construction costs, and are not suitable for the promotion of smart rails, the high-quality development of the urban rail transit industry, and the needs of high-quality services for passengers, which seriously restricts the development of urban rail transit network operations.

[0004] TETRA is an open digital trunking communication technology standard defined by the European Telecommunications Standards Institute (ETSI) and widely used. However, the TETRA standard only requires compatibility at the air interface level, and does not define interface standards for internal system interfaces such as the center and base station, center and dispatch. Although the European Telecommunications Standards Institute (ETSI) formulated the TETRA Intersystem Interconnection Standard (ISI) based on E1 and QSIG in 2000, no manufacturer actively supported this work after the standard was announced. In addition, the TETRA systems of current mainstream manufacturers have evolved to an IP-based networking architecture, and the interconnection interfaces between TETRA systems of different manufacturers cannot be unified, making it extremely difficult for TETRA systems of different manufacturers to interconnect with each other.

[0005] At present, the main way for different manufacturers' TETRA digital trunking communication systems to communicate with each other is to register TETRA vehicles to the opposite system to achieve interconnection, that is, to use a back-to-back method. However, this method can only achieve one-to-one communication of group calls, which is difficult to expand, limited in use, and simple in function. However, user needs often include not only group calls between systems, but also individual calls between systems, short data between systems, and dispatch services between systems. It is difficult to meet the growing demand for interconnection and communication between systems through existing methods. Summary of the invention

[0006] Based on the technical problem to be solved by the present invention, a scheduling intercommunication system based on digital cluster is proposed, which connects the switching centers and interconnected base station devices of multiple TETRA systems respectively through scheduling interfaces, one end of the interconnected base station device is connected to the base station of the opposite TETRA system through a wireless air interface, and the other end is connected to the switching center of the local TETRA system through an IP interface.

[0007] The interconnected base station equipment realizes the horizontal interconnection and intercommunication function between TETRA digital trunking systems of multiple different manufacturers, supports multi-way calls between systems, and supports cross-system terminal roaming, single call, group call, short data and other horizontal interconnection functions.

[0008] The dispatch console realizes vertical dispatch functions such as single call, group call, short data, multi-select group call, dynamic reorganization, remote stun and kill, and dispatch call of TETRA digital trunking systems of multiple different manufacturers through the dispatch interface.

[0009] The present invention is achieved through the following technical solutions:

[0010] A dispatching intercommunication system based on digital trunking, including a dispatching console, a dispatching server, a dispatching access gateway, a TETRA system and interconnected base station equipment;

[0011] The dispatch console is connected to the dispatch server through the S1 interface.

[0012] The dispatch server is connected to the dispatch access gateway through the S2 interface to encapsulate the acquired terminal dynamic information and perform unified dispatch logic processing;

[0013] The switching center of the TETRA system is connected to the dispatching access gateway through the A interface. After receiving and processing the power-on information of the terminal, it pushes the terminal dynamic information to the dispatching access gateway through the A interface;

[0014] The interconnected base station equipment is connected to the dispatch server through the S3 interface, and receives and processes the terminal dynamic information pushed by the dispatch server; when the terminal roams across systems, the interconnected base station equipment simulates sending the terminal dynamic information to the switching center of the local TETRA system and the interconnected TETRA system of the other end according to the terminal dynamic information pushed in real time by the dispatch server, so that the switching centers of the TETRA systems at both ends obtain the terminal dynamic information under the base station in real time, ensuring that the actual terminal dynamic information remains consistent in the two systems.

[0015] Furthermore, one end of the interconnected base station device is connected to the base station of the interconnected opposite TETRA system by wireless air interface, and based on the standard wireless air interface signaling of the TETRA system, the call signaling between the TETRA systems is parsed, the TETRA cluster media coding reception and transmission is realized, the signaling and media conversion processing is completed, and the cross-system intercommunication of the cluster call is realized;

[0016] The other end of the interconnected base station equipment is connected to the switching center of the local TETRA system through IP, that is, the B interface between the base station and the switching center of the TETRA system.

[0017] Furthermore, the interconnected base station device includes a base station side protocol stack and a terminal protocol stack;

[0018] The protocol stack on the base station side is responsible for simulating the interface with the local TETRA system switching center, realizing access to the local TETRA system switching center through IP in the B1 interface mode, and realizing the non-differential access of the local TETRA system switching center to the TETRA system base stations and interconnected base station equipment;

[0019] The terminal protocol stack is responsible for simulating and receiving the service signaling of the TETRA system terminal. On the one hand, it simulates the signaling of the base station side protocol stack as the signaling of the terminal protocol and sends it to the base station of the opposite TETRA system through the wireless air interface; on the other hand, it receives the air interface message of the opposite TETRA system base station, parses and processes it through the TETRA system terminal protocol stack, and then sends it to the base station side protocol stack.

[0020] Further, the interconnected base station equipment includes an interconnected base station controller and an interconnected transceiver;

[0021] The interconnected base station controller includes a base station side protocol stack, a signaling protocol conversion module, a terminal protocol stack and a signaling transceiver module;

[0022] The base station side protocol stack is the protocol stack on the TETRA system base station side, used for:

[0023] First, it processes the data converted by the signaling protocol: after receiving the message sent by the signaling protocol conversion module, it encodes it into the uplink signaling on the base station side, constructs the data packet of the B interface and sends it to the switching center of the local TETRA system;

[0024] Second, it processes the data from the switching center: it receives the signaling sent by the TETRA system switching center at the local end through the B interface, encodes it into the downlink signaling of the base station and sends it to the signaling protocol conversion module;

[0025] The signaling protocol conversion module is used to:

[0026] First, process the protocol stack data on the base station side: convert the signaling on the base station side into the terminal protocol stack signaling and send it to the base station of the opposite TETRA system;

[0027] Second, it processes the terminal protocol stack data: it receives the wireless air interface signaling sent by the TETRA system base station at the opposite end, then converts it into the signaling of the protocol stack on the base station side, and sends it to the switching center of the TETRA system at the local end through the B interface;

[0028] The signaling transceiver module is a scheduler triggered based on the TETRA frame time, which calls the link layer and physical layer protocol stack on the TETRA terminal side and completes the signaling transmission and reception through the interconnected transceivers.

[0029] Furthermore,

[0030] The switching center of the TETRA system receives the dynamic information of the terminal and actively pushes it to the dispatch access gateway through the A interface. The dispatch access gateway converts the information to the S2 interface and sends it to the dispatch server device. The dispatch server stores the dynamic information of the terminal pushed by the switching centers of different TETRA systems on the line side in the memory database, and sends it to the interconnected base station device through the S3 interface.

[0031] The dispatch server supports real-time query of the dynamic information of the terminal in the switching center of each TETRA system.

[0032] Furthermore,

[0033] The process of processing the message received by the interconnected base station device from the scheduling server is as follows:

[0034] Step 1: The interconnected base station device receives the terminal dynamic information pushed by the scheduling server;

[0035] Step 2, determining whether the terminal is a user configured in the interconnected base station device. If the terminal is a user configured in the local end, the interconnected base station constructs a registration request for the terminal and sends it to the local switching center through the B wired interface; if the terminal is not a user configured in the local end, proceed to step 3;

[0036] Step 3, determine whether this terminal is a user of the opposite end configured in the interconnected base station device. If this terminal is a user configured for the opposite end, the interconnected base station will construct a registration request for this terminal, send it to the base station of the opposite end through the wireless air interface, and then send it to the corresponding switching center by this base station; if this terminal is not a user configured for the opposite end, ignore the processing of this message.

[0037] Furthermore, the process of cross-system interconnection calling is as follows:

[0038] Step 1, terminal power on: First, MS2 terminal power on and register, then MS3 terminal power on and register;

[0039] Step 2, simulated registration: after the interconnected base station device a receives the power-on dynamic information message of MS3 pushed by the scheduling server; according to the configuration information of the interconnected base station device, the power-on message of the MS3 terminal is simulated through the wireless air interface signaling and sent to the base station BS2, and then the base station BS2 sends it to the switching center MSC2 of its TETRA system;

[0040] Step 3, simulated registration: after the interconnected base station device a receives the power-on dynamic information message of MS2 pushed by the scheduling server; according to the configuration information of the interconnected base station device, the power-on message of MS2 is constructed through the wired interface B1 and sent to the switching center MSC1;

[0041] Step 4, simulated registration: after the interconnected base station device b receives the power-on dynamic information message of MS2 pushed by the scheduling server; according to the configuration information of the interconnected base station, the power-on message of MS2 is simulated and sent to the base station BS3 through the wireless air interface signaling, and then sent by the base station BS3 to the switching center MSC3;

[0042] Step 5, simulated registration: after the interconnected base station device b receives the power-on dynamic information message of MS3 pushed by the scheduling server; according to the configuration information of the interconnected base station, it constructs the power-on message of MS3 through the wired interface B1 and sends it to the switching center MSC1;

[0043] Step 6, call initiation: MS2 terminal initiates a single call request to MS3 terminal;

[0044] Step 7, call control: After receiving the call request initiated by the MS2 terminal, the switching center MSC2 sends the call request of the MS2 terminal to the air interface through the base station BS2 according to the power on and off information of the MS2 terminal and the MS3 terminal;

[0045] Step 8, simulating initiating a call: the interconnected base station device a receives a call request from the MS2 terminal to the MS3 terminal from the wireless air interface, constructs a call request from the MS2 terminal to the MS3 terminal through the wired B1 interface, and then sends it to the switching center MSC1;

[0046] Step 9, call control: after receiving the call request initiated by the MS2 terminal, the switching center MSC1 sends the call request of the MS2 terminal to the interconnected base station device b according to the power-on and power-off information of the MS2 terminal and the MS3 terminal;

[0047] Step 10, simulating initiating a call: the interconnected base station device b receives a call request from the MS2 terminal to the MS3 terminal from the wired interface B1, and simulates sending a call request from the MS2 terminal to the MS3 terminal through the wireless air interface, and then sends it to the base station BS3 at the opposite end, and then the base station BS3 sends it to the switching center MSC3;

[0048] Step 11, call control: after receiving the call request initiated by the MS2 terminal, the switching center MSC3 sends the call request of the MS2 terminal to the air interface through the base station BS3 according to the power on and off information of the MS2 terminal and the MS3 terminal, thus completing the connection of the cross-system call.

[0049] Compared with the prior art, the present invention has the following beneficial effects:

[0050] The dispatching console in the present invention supports connecting the dispatching access gateway device with a standard interface, and realizes simultaneous connection to multiple different switching centers through the standardized dispatching interface, thereby solving the technical problem that the vertical dispatching of TETRA switching centers of different manufacturers for multiple lines cannot be realized through one dispatching console because most of the interfaces between the switching center and the dispatching console of the TETRA system are private interfaces.

[0051] The interconnection base station device in the present invention can simulate sending the dynamic information of all terminals with interconnection rights to the base station of the opposite TETRA system in real time through the wireless air interface by receiving the terminal dynamic information pushed by the processing scheduling server, so that the switching center of the TETRA system can accurately obtain the user dynamic information under the base station, avoid invalid call transfer processing, improve the efficiency of interconnection call processing, and save wireless air interface channel resources.

[0052] The interconnected base station device in the present invention includes a base station side protocol stack function, supports access to the local switching center in the same interface as the base station of the normal TETRA system, and realizes that the switching center of the TETRA system does not distinguish or perceive all business processes of the base station of the normal TETRA system and the interconnected base station device, thereby reducing the business complexity of the switching center of the TETRA system, and realizes the indifferent access of the switching center of the local TETRA system to the base station of the TETRA system and the interconnected base station device, thereby reducing the complexity of the switching center. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a system structure block diagram of an embodiment of the present invention.

[0054] Figure 2 It is a structural block diagram of an interconnected base station device according to an embodiment of the present invention.

[0055] Figure 3 It is a flow chart of the dispatching desk service in an embodiment of the present invention.

[0056] Figure 4 It is a business flow chart of the scheduling server according to an embodiment of the present invention.

[0057] Figure 5 It is a message processing flow chart of an embodiment of the present invention.

[0058] Figure 6 It is a startup flow chart of the MS1 terminal according to an embodiment of the present invention.

[0059] Figure 7 This is a startup flow chart of the MS2 terminal according to an embodiment of the present invention.

[0060] Figure 8 It is a startup flow chart of the MS3 terminal according to an embodiment of the present invention.

[0061] Fig. 9 It is a business process diagram of a cross-system interconnection call according to an embodiment of the present invention. DETAILED DESCRIPTION

[0062] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0063] This embodiment provides a new type of digital cluster system interconnection device developed based on a scheduling-based digital cluster system interconnection method, which includes scheduling-related equipment, TETRA interconnection base station equipment, etc., can quickly access TETRA digital cluster systems of different manufacturers and is easy to build.

[0064] In terms of interconnection between systems, horizontal interconnection functions such as terminal roaming, voice group call, voice single call and short data service between different TETRA digital trunking systems are realized through interconnected base station equipment; vertical dispatching functions such as single call, group call, short data, multi-select group call, dynamic reorganization, remote stun and kill, and dispatch call of different TETRA digital trunking systems are realized through the dispatch console.

[0065] A dispatching intercommunication system based on digital trunking, whose system architecture is designed as follows Figure 1 As shown, the design ideas are as follows:

[0066] The S1, S2, A1, A2, and A3 interfaces are all dispatch-related interfaces. The dispatch access gateway realizes the protocol conversion of the private interfaces A1, A2, and A3 of TETRA switching centers of different manufacturers, and converts them into the S1 interface between the dispatch desk and the S2 interface between the dispatch server.

[0067] In this design, the dispatching console uses the S1 interface to adapt, develop, and encapsulate the dispatching protocols of TETRA digital trunking communication systems of different manufacturers, and converts them into a unified dispatching logic interface. This enables the vertical dispatching of TETRA digital trunking systems of different manufacturers on multiple line sides through one dispatching console, including single call, group call, short data, multi-select group call, short data, dynamic reorganization, remote stun and kill, dispatch call, etc.

[0068] The dispatch server is connected to the dispatch access gateway device through the S2 interface, encapsulates the acquired terminal dynamic information and performs unified dispatch logic processing, and sends it to the interconnected base station device.

[0069] The interconnected base station equipment is connected to the dispatch server through the S3 interface, and receives and processes the terminal dynamic information pushed by the dispatch server. When the terminal is roaming across systems, the interconnected base station equipment simulates sending the terminal dynamic information to the exchange center of the local TETRA system and the interconnected opposite TETRA system based on the terminal dynamic information pushed in real time by the dispatch server. This enables the exchange center of the TETRA system to obtain the terminal dynamic information under the base station in real time, ensuring that the actual terminal dynamic information remains consistent in the two systems.

[0070] One end of the interconnected base station equipment is connected to the base station of the opposite TETRA system that needs to be interconnected through the wireless air interface. Based on the TETRA standard wireless air interface signaling, it parses the call signaling between TETRA systems, realizes the reception and transmission of TETRA trunking media coding (ACELP), completes the conversion of signaling and media, and realizes the cross-system intercommunication of trunking calls. The other end is connected to the switching center of the local TETRA system through IP, using the B1 interface between the base station and the switching center of the TETRA system.

[0071] The interconnected base station mainly includes a base station side protocol stack and a terminal protocol stack. The base station side protocol stack is responsible for simulating the interface with the switching center of the local TETRA system, and realizing access to the local switching center through IP in the form of a B1 interface, so that the switching center of the accessed TETRA system does not distinguish or perceive the business processes of the base stations of the normal TETRA system and the interconnected base station equipment, thereby reducing the business complexity of the switching center of the TETRA system and realizing the indifferent access of the local TETRA switching center to the base stations of the TETRA system and the interconnected base station equipment.

[0072] The terminal protocol stack is responsible for simulating and receiving the service signaling of the terminal of the TETRA system. On the one hand, it simulates the signaling of the base station side protocol stack as the signaling of the terminal protocol and sends it to the base station on the other end through the wireless air interface. On the other hand, it receives the air interface message of the base station of the opposite TETRA system, parses and processes it through the terminal protocol stack of the TETRA system, and then sends it to the base station side protocol stack.

[0073] The software architecture of the interconnected base station is as follows Figure 2 As shown; the interconnected base station is composed of an interconnected base station controller and an interconnected transceiver; wherein the interconnected base station controller is composed of a base station side protocol stack, a signaling protocol conversion module, a terminal protocol stack, and a signaling transceiver module.

[0074] The functions of each module in the interconnected base station are as follows:

[0075] The base station side protocol stack is the protocol stack on the TETRA base station side, and its main function is to parse signaling in two directions:

[0076] First, processing the data converted by the signaling protocol: after receiving the message sent by the signaling protocol conversion module, it is used to encode it into the uplink signaling on the base station side, construct the data packet of the base station B1 interface and send it to the local switching center MSC;

[0077] Second, process the data of the switching center: receive the signaling sent by the local switching center MSC through the base station B1 interface, encode it into the base station downlink signaling and send it to the signaling protocol conversion module.

[0078] The signaling protocol conversion module is an important network element inside the interconnected base station. Its main function is to parse the signaling sent in two directions:

[0079] First, process the protocol stack data on the base station side: convert the signaling on the base station side into the terminal protocol stack signaling and send it to the base station of the opposite TETRA system.

[0080] Second, it processes the terminal protocol stack data: it receives the wireless air interface signaling sent by the base station of the opposite TETRA system, converts it into the signaling of the base station side protocol stack, and sends it to the switching center MSC through the base station B1 interface.

[0081] Signaling transceiver module: The signaling transceiver module is based on a scheduler triggered by the TETRA frame time, calls the link layer and physical layer protocol stack on the TETRA terminal side, and completes the signaling transmission and reception through interconnected transceivers.

[0082] The business process of the dispatch desk is as follows: Figure 3 As shown:

[0083] The dispatching console is connected to the dispatching access gateway device through the standard S1 dispatching interface, and is sent to different dispatching access gateways through the configured user line identifier. The dispatching access gateway device is responsible for completing the protocol conversion between the private A1, A2, A3 dispatching interfaces and the standard S1 dispatching interface. The vertical dispatching function of TETRA switching centers of different manufacturers on multiple lines can be completed through one dispatching console.

[0084] The business process of the scheduling server is as follows Figure 4 As shown:

[0085] The switching center of the TETRA system receives the dynamic information of the terminal and actively pushes it to the dispatch access gateway device through the private interface between the switching center and the dispatch. The dispatch access gateway device then converts the standard S2 interface and sends it to the dispatch server device. The dispatch server stores the dynamic information of the terminal pushed by the switching centers of different TETRA systems on the line side in the memory database, and actively sends it to the interconnected base station equipment through the S3 interface. In addition, the dispatch server supports real-time query of the dynamic information of the terminal under each TETRA switching center.

[0086] The process of processing the message received by the interconnected base station device from the dispatch server is as follows Figure 5 As shown:

[0087] Step 1: The interconnected base station device receives the terminal dynamic information pushed by the scheduling server;

[0088] Step 2: determine whether the terminal is a user of the local end configured in the interconnection base station device. If the terminal is a user configured on the local end, the side interconnection base station will construct a registration request for the terminal and send it to the switching center through the B1 wired interface;

[0089] Step 3, determining whether the terminal is a user of the opposite end configured in the interconnected base station device. If the terminal is a user configured by the opposite end, the interconnected base station will construct a registration request for the terminal, send it to the base station of the opposite end through the wireless air interface, and then the base station will send it to the switching center;

[0090] Step 4: If the terminal is not a user configured by the interconnected base station device, the processing of this message is ignored.

[0091] The terminal startup process is as follows:

[0092] MS1 startup process is as follows Figure 6 As shown:

[0093] Step 1: When the terminal MS1 is powered on, it initiates a power-on registration and group attachment service request under the base station BSC1. The base station sends the received terminal power-on and group attachment information to the switching center MSC1.

[0094] Step 2: After receiving the power-on information of the terminal, the switching center MSC1 processes it and actively pushes the terminal dynamic information to the dispatch access gateway server through the A1 interface. The dispatch access gateway server converts the information into the standardized S2 interface and sends it to the dispatch server.

[0095] Step 3: The dispatch server forwards the data to the interconnected base station device through the standardized S3 interface.

[0096] Step 4: After receiving the terminal push information, the interconnection base station device a first determines whether the pushed terminal is an interconnection user configured on the interconnection base station device a. After the legitimacy check, the interconnection base station simulates sending the power-on registration and group attachment message of the MS1 terminal under the base station, and sends the information to the base station BS2 through the wireless air interface;

[0097] Step 5: After receiving the power-on message from the terminal MS1, the base station BS2 sends the message to the switching center MSC2.

[0098] The MS2 startup process is as follows Figure 7 As shown:

[0099] Step 1: When the terminal MS2 is powered on, it initiates a power-on registration and group attachment service request under the base station BSC2. The base station sends the received terminal power-on and group attachment information to the switching center MSC2.

[0100] Step 2: After receiving the power-on information of the terminal, the switching center MSC2 processes it and actively pushes the terminal dynamic information to the dispatch access gateway server through the A2 interface. The dispatch access gateway server converts the information into the standardized S2 interface and sends it to the dispatch server.

[0101] Step 3: The scheduling server forwards the data to the interconnected base station device a and the interconnected base station device b through the standardized S3 interface.

[0102] Step 4, after the interconnection base station device a receives the terminal push information, it first determines whether the pushed terminal is a local interconnection user configured on the interconnection base station. After the legitimacy check, the interconnection base station device a simulates sending the power-on registration and group attachment message of the MS2 terminal under the base station, and sends it to the switching center MSC1 through the wired interface B1 between the base station and the switching center.

[0103] Step 5, after the interconnection base station device b receives the terminal push information, it first determines whether the pushed terminal is the opposite interconnection user configured on the interconnection base station. After the legitimacy detection, the interconnection base station b simulates sending the power-on registration and group attachment message of the MS2 terminal under the base station, and sends it to the opposite base station BS3 through the wireless air interface, and then sends it to the switching center MSC3 through the base station BS3.

[0104] The MS3 boot process is as follows Figure 8 As shown:

[0105] Step 1: When the terminal MS3 is powered on, it initiates a power-on registration and group attachment service request under the base station BSC3. The base station sends the received terminal power-on and group attachment information to the switching center MSC3.

[0106] Step 2: After receiving the power-on information of the terminal, the switching center MSC3 actively pushes the terminal dynamic information to the dispatch access gateway server through the A2 interface. The dispatch access gateway server converts the information into the standardized S2 interface and sends it to the dispatch server.

[0107] Step 3: The scheduling server forwards the data to the interconnected base station device a and the interconnected base station device b through the standardized S3 interface.

[0108] Step 4, after the interconnection base station device a receives the terminal push information, it first determines whether the pushed terminal is a local interconnection user configured on the interconnection base station. After the legitimacy check, the interconnection base station device b simulates sending the power-on registration and group attachment message of the MS3 terminal under the base station, and sends it to the switching center MSC1 through the wired interface B1 between the base station and the switching center.

[0109] Step 5, after the interconnection base station device a receives the terminal push information, it first determines whether the pushed terminal is the opposite interconnection user configured on the interconnection base station. After the legitimacy detection, the interconnection base station device a simulates sending the power-on registration and group attachment message of the MS3 terminal under the base station, and sends it to the opposite base station BS2 through the wireless air interface, and then sends it to the switching center MSC2 through the base station BS2.

[0110] The switching center of the TETRA system can obtain the dynamic information of the terminals under the base station in real time based on the terminal dynamic information simulated and sent by the interconnected base station, and accurately obtain the user information under the base station, so as to realize fast call establishment, improve the efficiency of interconnected call processing, and save wireless air interface channel resources.

[0111] The business process of cross-system interconnection calls is as follows Fig. 9 As shown:

[0112] The business process of MS2 calling MS3 is as follows:

[0113] Step 1, terminal power on: First, MS2 terminal power on and register, then MS3 terminal power on and register;

[0114] Step 2, simulated registration: after the interconnected base station device a receives the power-on dynamic information message of MS3 pushed by the scheduling server; according to the configuration information of the interconnected base station device, the power-on message of the MS3 terminal is simulated through the wireless air interface signaling and sent to the base station BS2, and then the base station BS2 sends it to the switching center MSC2 of its TETRA system;

[0115] Step 3, simulated registration: after the interconnected base station device a receives the power-on dynamic information message of MS2 pushed by the scheduling server; according to the configuration information of the interconnected base station device, the power-on message of MS2 is constructed through the wired interface B1 and sent to the switching center MSC1;

[0116] Step 4, simulated registration: after the interconnected base station device b receives the power-on dynamic information message of MS2 pushed by the scheduling server; according to the configuration information of the interconnected base station, the power-on message of MS2 is simulated and sent to the base station BS3 through the wireless air interface signaling, and then sent by the base station BS3 to the switching center MSC3;

[0117] Step 5, simulated registration: after the interconnected base station device b receives the power-on dynamic information message of MS3 pushed by the scheduling server; according to the configuration information of the interconnected base station, it constructs the power-on message of MS3 through the wired interface B1 and sends it to the switching center MSC1;

[0118] Step 6, call initiation: MS2 terminal initiates a single call request to MS3 terminal;

[0119] Step 7, call control: After receiving the call request initiated by the MS2 terminal, the switching center MSC2 sends the call request of the MS2 terminal to the air interface through the base station BS2 according to the power on and off information of the MS2 terminal and the MS3 terminal;

[0120] Step 8, simulating initiating a call: the interconnected base station device a receives a call request from the MS2 terminal to the MS3 terminal from the wireless air interface, constructs a call request from the MS2 terminal to the MS3 terminal through the wired B1 interface, and then sends it to the switching center MSC1;

[0121] Step 9, call control: after receiving the call request initiated by the MS2 terminal, the switching center MSC1 sends the call request of the MS2 terminal to the interconnected base station device b according to the power-on and power-off information of the MS2 terminal and the MS3 terminal;

[0122] Step 10, simulating initiating a call: the interconnected base station device b receives a call request from the MS2 terminal to the MS3 terminal from the wired interface B1, and simulates sending a call request from the MS2 terminal to the MS3 terminal through the wireless air interface, and then sends it to the base station BS3 at the opposite end, and then the base station BS3 sends it to the switching center MSC3;

[0123] Step 11, call control: after receiving the call request initiated by the MS2 terminal, the switching center MSC3 sends the call request of the MS2 terminal to the air interface through the base station BS3 according to the power on and off information of the MS2 terminal and the MS3 terminal, thus completing the connection of the cross-system call.

[0124] It should be noted that the above description is only a preferred application example of the present invention and is not intended to limit the protection scope of the present invention. Any technical solution using equivalent replacement or equivalent transformation is within the protection scope of the present invention.

Claims

1. A dispatching intercommunication system based on digital trunking, characterized in that: Including dispatch desk, dispatch server, dispatch access gateway, TETRA system and interconnected base station equipment; The dispatch console is connected to the dispatch server through the S1 interface. The dispatch server is connected to the dispatch access gateway through the S2 interface to encapsulate the acquired terminal dynamic information and perform unified dispatch logic processing; The switching center of the TETRA system is connected to the dispatching access gateway through the A interface. After receiving and processing the power-on information of the terminal, it pushes the terminal dynamic information to the dispatching access gateway through the A interface; The interconnected base station equipment is connected to the dispatch server through the S3 interface, and receives and processes the terminal dynamic information pushed by the dispatch server; when the terminal roams across systems, the interconnected base station equipment simulates sending the terminal dynamic information to the switching center of the local TETRA system and the interconnected opposite TETRA system according to the terminal dynamic information pushed in real time by the dispatch server, so that the switching centers of the TETRA systems at both ends obtain the terminal dynamic information under the base station in real time, ensuring that the actual terminal dynamic information is consistent in the two systems; The dispatch desk is connected to the dispatch access gateway device through the S1 dispatch interface, and is sent to different dispatch access gateways through the configured user line identifier. The dispatch access gateway device is responsible for completing the protocol conversion between the private A1, A2, A3 dispatch interfaces and the standard S1 dispatch interface; it realizes the vertical dispatch function of TETRA exchange centers of different manufacturers with multiple lines through one dispatch desk; S1, S2, A1, A2 and A3 interfaces are all dispatch-related interfaces, and the protocol conversion of the private interfaces A1, A2, A3 of TETRA exchange centers of different manufacturers is realized through the dispatch access gateway, and converted into the S1 interface between the dispatch desk and the S2 interface between the dispatch server.

2. A dispatching intercommunication system based on digital trunking according to claim 1, characterized in that: One end of the interconnected base station device is connected to the base station of the interconnected opposite TETRA system in a wireless air interface manner, and based on the TETRA system standard wireless air interface signaling, the inter-TETRA system call signaling is parsed to realize the TETRA trunking media coding reception and transmission, complete the signaling and media conversion processing, and realize the cross-system intercommunication of the trunking call; The other end of the interconnected base station equipment is connected to the switching center of the local TETRA system through IP, that is, the B interface between the base station and the switching center of the TETRA system.

3. A dispatching intercommunication system based on digital trunking according to claim 1, characterized in that: The interconnected base station equipment includes a base station side protocol stack and a terminal protocol stack; The protocol stack on the base station side is responsible for simulating the interface with the local TETRA system switching center, realizing access to the local TETRA system switching center through IP in the B1 interface mode, and realizing the non-differential access of the local TETRA system switching center to the TETRA system base stations and interconnected base station equipment; The terminal protocol stack is responsible for simulating and receiving the service signaling of the TETRA system terminal. On the one hand, it simulates the signaling of the base station side protocol stack as the signaling of the terminal protocol and sends it to the base station of the opposite TETRA system through the wireless air interface; on the other hand, it receives the air interface message of the opposite TETRA system base station, parses and processes it through the TETRA system terminal protocol stack, and then sends it to the base station side protocol stack.

4. The dispatching intercommunication system based on digital trunking according to claim 1, characterized in that: The interconnected base station equipment includes an interconnected base station controller and an interconnected transceiver; The interconnected base station controller includes a base station side protocol stack, a signaling protocol conversion module, a terminal protocol stack and a signaling transceiver module; The base station side protocol stack is the protocol stack on the TETRA system base station side, which is used for: First, it processes the data converted by the signaling protocol: after receiving the message sent by the signaling protocol conversion module, it encodes it into the uplink signaling on the base station side, constructs the data packet of the B interface and sends it to the switching center of the local TETRA system; Second, it processes the data from the switching center: it receives the signaling sent by the TETRA system switching center at the local end through the B interface, encodes it into the downlink signaling of the base station and sends it to the signaling protocol conversion module; The signaling protocol conversion module is used to: First, process the protocol stack data on the base station side: convert the signaling on the base station side into the terminal protocol stack signaling and send it to the base station of the opposite TETRA system; Second, it processes the terminal protocol stack data: it receives the wireless air interface signaling sent by the TETRA system base station at the opposite end, then converts it into the signaling of the protocol stack on the base station side, and sends it to the switching center of the TETRA system at the local end through the B interface; The signaling transceiver module is a scheduler triggered based on the TETRA frame time, which calls the link layer and physical layer protocol stack on the TETRA terminal side and completes the signaling transmission and reception through the interconnected transceivers.

5. The dispatching intercommunication system based on digital trunking according to claim 1, characterized in that: The switching center of the TETRA system receives the dynamic information of the terminal and actively pushes it to the dispatch access gateway through the A interface. The dispatch access gateway converts the information to the S2 interface and sends it to the dispatch server device. The dispatch server stores the dynamic information of the terminal pushed by the switching centers of different TETRA systems on the line side in the memory database, and sends it to the interconnected base station device through the S3 interface. The dispatch server supports real-time query of the dynamic information of the terminal in the switching center of each TETRA system.

6. A dispatching intercommunication system based on digital trunking according to claim 1, characterized in that: The process of processing the message received by the interconnected base station device from the scheduling server is as follows: Step 1: The interconnected base station device receives the terminal dynamic information pushed by the scheduling server; Step 2, determining whether the terminal is a user configured in the interconnected base station device. If the terminal is a user configured in the local end, the interconnected base station constructs a registration request for the terminal and sends it to the local switching center through the B wired interface; if the terminal is not a user configured in the local end, proceed to step 3; Step 3, determine whether this terminal is a user of the opposite end configured in the interconnected base station device. If this terminal is a user configured for the opposite end, the interconnected base station will construct a registration request for this terminal, send it to the base station of the opposite end through the wireless air interface, and then send it to the corresponding switching center by this base station; if this terminal is not a user configured for the opposite end, ignore the processing of this message.

7. A dispatching intercommunication system based on digital trunking according to claim 1, characterized in that: The process of inter-system interconnection calling is as follows: Step 1, terminal power on: First, MS2 terminal power on and register, then MS3 terminal power on and register; Step 2, simulated registration: after the interconnected base station device a receives the power-on dynamic information message of MS3 pushed by the scheduling server; according to the configuration information of the interconnected base station device, the power-on message of the MS3 terminal is simulated through the wireless air interface signaling and sent to the base station BS2, and then the base station BS2 sends it to the switching center MSC2 of its TETRA system; Step 3, simulated registration: after the interconnected base station device a receives the power-on dynamic information message of MS2 pushed by the scheduling server; according to the configuration information of the interconnected base station device, the power-on message of MS2 is constructed through the wired interface B1 and sent to the switching center MSC1; Step 4, simulated registration: after the interconnected base station device b receives the power-on dynamic information message of MS2 pushed by the scheduling server; according to the configuration information of the interconnected base station, the power-on message of MS2 is simulated and sent to the base station BS3 through the wireless air interface signaling, and then sent by the base station BS3 to the switching center MSC3; Step 5, simulated registration: after the interconnected base station device b receives the power-on dynamic information message of MS3 pushed by the scheduling server; according to the configuration information of the interconnected base station, it constructs the power-on message of MS3 through the wired interface B1 and sends it to the switching center MSC1; Step 6, call initiation: MS2 terminal initiates a single call request to MS3 terminal; Step 7, call control: After receiving the call request initiated by the MS2 terminal, the switching center MSC2 sends the call request of the MS2 terminal to the air interface through the base station BS2 according to the power on and off information of the MS2 terminal and the MS3 terminal; Step 8, simulating initiating a call: the interconnected base station device a receives a call request from the MS2 terminal to the MS3 terminal from the wireless air interface, constructs a call request from the MS2 terminal to the MS3 terminal through the wired B1 interface, and then sends it to the switching center MSC1; Step 9, call control: after receiving the call request initiated by the MS2 terminal, the switching center MSC1 sends the call request of the MS2 terminal to the interconnected base station device b according to the power-on and power-off information of the MS2 terminal and the MS3 terminal; Step 10, simulating initiating a call: the interconnected base station device b receives a call request from the MS2 terminal to the MS3 terminal from the wired interface B1, and simulates sending a call request from the MS2 terminal to the MS3 terminal through the wireless air interface, and then sends it to the base station BS3 at the opposite end, and then the base station BS3 sends it to the switching center MSC3; Step 11, call control: after receiving the call request initiated by the MS2 terminal, the switching center MSC3 sends the call request of the MS2 terminal to the air interface through the base station BS3 according to the power on and off information of the MS2 terminal and the MS3 terminal, thus completing the connection of the cross-system call.

Images