CN105472187A - Voice communication control system based on TDM and IP buses - Google Patents

Abstract

The invention discloses a voice communication control system based on TDM and IP dual bus, including IP telephone, voice communication panel, network management terminal, external IP network, MPU unit, magnet interface, EM interface, FXO interface and FXS interface; The IP phone, voice communication panel, network management terminal and external IP network are the IP side, which are connected to the MPU unit through the IP bus; the magnet interface, EM interface, FXO interface and FXS interface are the TDM side, which are connected to the MPU unit through the TDM bus; the voice The communication panel is a communication terminal; the network management terminal realizes system monitoring and management, and the external IP network realizes external interconnection of the system; the magnet interface, EM interface, FXO interface and FXS interface are analog user interfaces based on TDM bus.

Description

A Voice Communication Control System Based on TDM and IP Dual Bus

technical field

The invention belongs to the technical field of voice communication, and in particular relates to a voice communication control system based on TDM and IP dual buses for the interaction and conversion of TDM bus, IP bus signaling information and media information.

Background technique

The voice communication control system is an important part of large-scale automatic command and control systems such as military and civil aviation control and military command and control. At present, there are related products of two technical systems on the market. One is the traditional one that uses TDM as the bus and circuit switching as the core. The voice communication control system; the second is a voice communication control system based on commercial server architecture and IP soft switch as the core. The products of the two technical systems have their own advantages and disadvantages. The former is widely used because of its advantages such as high voice quality, strong real-time processing, small delay, strong network switching and conference bridge capabilities, but there is also a signal transmission distance. However, due to the use of commercial servers as the platform and the implementation of pure softswitching, although its network capabilities have been improved, it still has processing capabilities, especially media switching capabilities, conference bridges, etc. Capabilities such as capacity and media processing implementation are limited by its hardware platform and cannot meet the requirements of the large-capacity command and control system in terms of the number of interfaces, multi-function (especially the ground-air conference function), and real-time performance.

Contents of the invention

The present invention discloses a voice communication control system based on TDM and IP dual bus to realize voice connection, Routing and switching functions.

The invention discloses a voice communication control system based on TDM and IP dual buses, including an IP telephone, a voice communication panel, a network management terminal, an external IP network, an MPU unit, a magnet interface, an EM interface, an FXO interface and an FXS interface;

The IP phone, the voice communication panel, the network management terminal and the external IP network are the IP side, and are connected to the MPU unit through the IP bus;

The magnet interface, EM interface, FXO interface and FXS interface are on the TDM side, and are connected to the MPU unit through the TDM bus;

The voice communication panel is a communication terminal;

The network management terminal realizes system monitoring and management, and the external IP network is connected to the outside world of the system;

The magnet interface, EM interface, FXO interface and FXS interface are analog user interfaces based on the TDM bus.

In the present invention, the MPU unit includes a CPU module, an IP switching module, a serial port processing module, a DSP module, a conference processing module, a TDM-RTP conversion module and a TDM switching module;

The CPU module is respectively connected to an IP switching module, a serial port processing module, a DSP module, a conference processing module and a TDM switching module; - The RTP conversion module is connected to the TDM switching module; the serial processing module is connected to the magnet interface, the EM interface, the FXO interface and the FXS interface through the serial bus; the DSP module is connected to the TDM switching module through the TDM bus; The internal bus is connected to the TDM switching module; the TDM switching module is respectively connected to the magnet interface, the EM interface, the FXO interface and the FXS interface through the TDM bus;

The IP exchange module realizes the exchange control of voice packets;

The conference processing module realizes the voice mixing function between different users, supports echo cancellation of 512 channels, and the echo cancellation duration is 32ms;

The TDM-RTP conversion module realizes the media format conversion between RTP and TDM;

The TDM switching module realizes media stream conversion, distribution, and fusion between different users, and realizes voice transmission among different users.

The magnet interface is used to connect to the magnet phone, which can send ring current, detection capability of external ring current incoming signal and voice transmission.

The EM interface can be interconnected with EM trunks between other switching networks to complete the establishment of EM trunk links between the system and the external switching network, voice signal access, signaling control and transmission; at the same time, the EM interface can be connected with The radio station interconnection of the EM interface realizes the voice sending and receiving control of the radio station;

The FXO interface can be interconnected with the FXS interface of other switching networks, and is used to complete the establishment of the analog trunk link between the system and the external switching network, voice signal access, signaling control and transmission;

The FXS interface is used to connect to the analog public telephone to realize voice signal access, signaling control and transmission of the analog public telephone.

The present invention comprises the following steps:

The CPU module in the MPU unit is initialized, and receives user registration information from the IP bus through the IP switching module, including registration information of IP phones, voice communication panels and external IP networks, and realizes resource allocation and status monitoring of IP users; the CPU module through the serial port The processing module receives initialization information from the magnet interface, EM interface, FXO interface and FXS interface, and realizes resource allocation and status monitoring of the above analog interfaces;

When the IP side user issues a call request, the IP switching module receives the message and sends it to the CPU module, and the CPU module judges the type of the called party. If the called party is still an IP side user, it searches for the called routing information through the IP switching module. Establish a call; if the called party is a TDM side user, the CPU module uses the serial port processing module to send signaling information to the called party through the serial port bus, and connects the called time slot through the TDM-RTP conversion module and the TDM switching module to realize the call ;

When the user on the TDM side issues a call request, the CPU module obtains the calling state parameters through the serial port processing module, processes the sending and receiving number through the DSP module, and the CPU module obtains the information of the serial port processing When the party is still a user on the TDM side, the CPU module sends signaling information to the called party through the serial port processing module, and connects to the called time slot through the TDM switching module to realize the call; if the called party is a user on the IP side, the CPU module switches The module looks up the called routing information to realize the call;

When each user needs to hold a conference, the voice of the IP side user is uniformly converted into TDM format and mixed through the conference processing module, and the mixed voice is sent to the analog user interface by the TDM switching module through the TDM bus, or through the on-chip bus Send it back to the IP switching module, and publish it to the IP side user through the IP bus through the IP switching module to realize the multi-party conference function.

The voice communication control system of the present invention is composed of MPU, various interface modules and terminals. The MPU is the control and switching center of the voice communication control system, and is used to realize large-capacity switching network, conference bridge, signaling processing, signal tone generation, and system control. connection and network communication functions. Design IP bus and TDM bus in MPU at the same time, IP bus can be interconnected with external IP terminals (such as: IP phone, voice communication panel, network management terminal, etc.), TDM bus can be connected with external analog interfaces (such as: FXS interface, FXO interface , EM interface, magnet interface, etc.) interconnection to realize the access of different types of users. Use large-scale FPGA to realize IP switching, TDM switching, TDM-RTP conversion and conference processing functions.

Compared with the prior art, the present invention has the remarkable advantages of:

a) The integrated design architecture of circuit switching and soft switching. In the voice communication system, IP bus and TDM bus are designed at the same time, which enhances the access capability of the system and ensures high real-time and low distortion in the voice transmission process.

b) The present invention uses a large-capacity FPGA chip to realize the conference bridge function, the switching network capacity reaches 8192×8192, and the maximum access number of seats reaches 1024, which greatly improves the switching capability and access capability of the system.

c) The present invention adopts a modular design idea, divides the software system into a plurality of business function modules according to business functions, and communicates between each module through messages, thereby ensuring the relative independence of each sub-module and making the system software structure more For clarity, it is convenient for the subsequent function expansion of the product.

d) Call processing method based on conference mode. Utilizing the convergent processing capability and concurrent processing capability of the conference processing module, the traditional individual call, group call, conference and other diverse call processing are all unified into conference processing, which simplifies the processing process and improves the stability and reliability of the system.

e) The core processor of the present invention adopts an X86 processor, which has strong processing capability and is stable and reliable.

Description of drawings

Fig. 1 is a schematic diagram of the system structure of the present invention.

detailed description

The invention discloses a voice communication control system based on TDM and IP dual buses. It includes IP phone, voice communication panel, network management terminal, external IP network, MPU, magnet interface, EM interface, FXO interface, FXS interface. It can realize the access of different users based on IP and TDM, and realize the ground-ground and ground-air communication functions within the system and across systems. The voice communication control system integrating the advantages of IP switching and TDM switching has a mature technical system, advanced system structure, friendly man-machine interface, rich hardware interfaces, flexible configuration management, and can conveniently realize various ground communications, ground-air communications, Functions such as monitoring and management can be applied to voice communication systems in command and control fields such as military and civilian airports.

Example

The voice communication control system of the present invention includes an IP phone 1, a voice communication panel 2, a network management terminal 3, an external IP network 4, an MPU unit 5, a magnet interface 6, an EM interface 7, an FXO interface 8, and an FXS interface 9.

As shown in Figure 1, this embodiment discloses a voice communication control system based on TDM and IP dual bus, including IP phone 1, voice communication panel 2, network management terminal 3, external IP network 4, MPU unit 5, magnet Interface 6, EM interface 7, FXO interface 8 and FXS interface 9; the IP phone 1, voice communication panel 2, network management terminal 3 and external IP network 4 are the IP side, connected to the MPU unit 5 through the IP bus; the magnet interface 6 , EM interface 7, FXO interface 8 and FXS interface 9 are TDM side, link MPU unit 5 through TDM bus; The voice communication panel 2 is a communication terminal; The network management terminal 3 realizes system monitoring and management, and the external IP network 4 realizes The system is interconnected externally; magnet interface 6, EM interface 7, FXO interface 8 and FXS interface 9 are analog user interfaces based on TDM bus. The MPU5 includes a CPU module 51, an IP switching module 52, a serial port processing module 53, a DSP module 54, a meeting processing module 55, a TDM-RTP conversion module 56 and a TDM switching module 57; the CPU module 51 is connected to the IP switching module 52 respectively , serial port processing module 53, DSP module 54, conference processing module 55 and TDM switching module 57; Described IP switching module 52 connects IP phone 1, voice communication panel 2, network management terminal 3 and external IP network 4 respectively, and through TDM - The RTP conversion module 56 is connected to the TDM switching module 57; the serial port processing module 53 is respectively connected to the magnet interface 6, the EM interface 7, the FXO interface 8 and the FXS interface 9 through the serial bus; the DSP module 54 is connected to the TDM switching module through the TDM bus 57; the conference processing module 55 is connected to the TDM switching module 57 through an on-chip bus; the TDM switching module 57 is respectively connected to the magnet interface 6, the EM interface 7, the FXO interface 8 and the FXS interface 9 through the TDM bus; the IP switching module 52 realizes The exchange control of voice packet; the conference processing module 55 realizes the voice mixing function between different users, supports the echo cancellation of 512 channels, and the echo cancellation duration is 32ms; the TDM-RTP conversion module 56 realizes the media format between RTP and TDM Conversion: the TDM switching module 57 realizes media stream conversion, distribution, and fusion between different users, and realizes voice transmission between different users.

The IP phone 1 can register with the MPU through the network interface, and can realize voice communication with other users in the system by dialing a number after the registration is successful.

The voice communication panel 2 is an important terminal device of the system, which is connected to the system through a network interface, and is the main man-machine interface and communication means for the commander to realize ground-to-ground voice communication and ground-to-air voice communication.

The network management terminal 3 is an important management interface of the system, which is connected to the system through the network interface to realize functions such as monitoring and management of equipment operation and parameter configuration management of the system.

The external IP network 4 realizes the interconnection between the system and the external system of the same type, and realizes the cross-regional voice communication function through the SIP protocol.

The MPU unit 5 includes a CPU module 51 , an IP switching module 52 , a serial port processing module 53 , a DSP module 54 , a conference processing module 55 , a TDM-RTP conversion module 56 , and a TDM switching module 57 .

The CPU module 51 is implemented by a high-performance A8 processor, and has the characteristics of small size, low power consumption, wide operating temperature range, high stability, fast connection speed, and strong anti-interference ability.

IP switching module 52, conference processing module 55, TDM-RTP conversion module 56, and TDM switching module 57 are all realized by large-capacity, high-speed, high-performance, low-latency FPGA chips, wherein, IP switching module 52 realizes voice packet Exchange control; the conference processing module 55 realizes the voice mixing function between different users, supports echo cancellation of 512 channels, and the echo cancellation duration is 32ms; the TDM-RTP conversion module 56 realizes media format conversion between RTP and TDM, and supports G. 711A/U, G.723.1 (5.3/6.3k), G.729 and other voice coding protocols; the TDM switching module 57 realizes media stream conversion, distribution, and fusion between different users, and realizes voice transmission among different users. The serial port processing module 53 is realized by ARM7 chip, and the high-speed serial port of the ARM7 chip is used to realize message command communication with other interfaces, so as to obtain the running status of each interface, receive the data reported by each interface, and issue various control commands at the same time to realize MPU Unified management of each interface. The DSP module 54 is realized by a DSP chip, and can realize DTMF/MFC/FSK sending and receiving of 64 channels of TDM signals.

The magnet interface 6 is used to connect to the magnet phone, and has the capability of detecting external ring current, external ring current incoming signal, and voice transmission.

The EM interface 7 can interconnect with EM trunks between other switching networks, and complete the establishment of EM trunk links between the system and external switching networks, voice signal access, signaling control and transmission. At the same time, the EM interface can be interconnected with the radio station with the EM interface to realize the voice sending and receiving control of the radio station.

FXO interface 8 can be interconnected with FXS interfaces between other switching networks (PBX/PSTN, etc.), and is used to complete the establishment of analog trunk links between the system and external switching networks, voice signal access, and signaling control with transmission.

The FXS interface 9 is used to connect to the analog public telephone to realize voice signal access, signaling control and transmission of the analog public telephone.

The work flow of the voice communication control system based on TDM and IP dual bus of the present invention is: after the system is powered on, the CPU module 51 in the MPU unit 5 initializes other modules, and after completing the initialization work, the IP exchange module 52 accepts The user registration information from the IP bus, including the registration information of the IP phone 1, the voice communication panel 2 and the external IP network 4, realizes the resource allocation and status monitoring of the IP user; through the serial port processing module 53, it receives information from the magnet interface 6 and the EM interface 7 , initialization information of the FXO interface 8 and the FXS interface 9, and implement resource allocation and status monitoring of the above-mentioned analog interfaces.

When the IP side user issues a call request, the message is received by the IP switching module 52 and sent to the CPU module 51, and the CPU module 51 judges the type of the called party. call routing information, and set up a call; if the called party is a TDM side user, the CPU module 51 utilizes the high-speed serial port bus to send signaling information to the called party through the serial port processing module 53, and passes through the TDM-RTP conversion module 56 and the TDM switching module 57 Connect the called time slot to realize the call.

When the TDM side user issues a call request, the calling state parameter is obtained by the serial port processing module 53, and the sending and receiving number is processed by the DSP module 54, and the CPU module 51 obtains the information of the serial port processing module 53 and the DSP module 54, and judges the type of the called party. If the called party is still a TDM side user, the CPU module 51 sends signaling information to the called party through the serial port processing module 53, and connects the called time slot by the TDM switching module 57 to realize a conversation; if the called party is an IP side user , the CPU module 51 searches the called routing information through the IP switching module 52 to implement the call.

When each user in the system needs to hold a meeting, the voice of the IP side user needs to be uniformly converted into TDM format and mixed through the conference processing module 55, and the mixed sound is sent to the analog user interface by the TDM switching module 57 through the TDM bus. Or send it back to the IP switch module 52 through the on-chip bus, and publish it to the IP side user through the IP switch module 52 through the IP bus to realize the multi-party conference function.

The present invention provides a voice communication control system based on TDM and IP dual buses. There are many methods and approaches for realizing the technical solution. The above descriptions are only preferred implementation modes of the present invention. For those skilled in the art, on the premise of not departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be regarded as the protection scope of the present invention. All components that are not specified in this embodiment can be realized by existing technologies.

Claims (7)

1. A voice communication control system based on TDM and IP dual bus, is characterized in that, comprises IP phone (1), voice communication panel (2), network management terminal (3), external IP network (4), MPU unit (5), magnet interface (6), EM interface (7), FXO interface (8) and FXS interface (9); Described IP phone (1), voice communication panel (2), network management terminal (3) and external IP network (4) are IP side, link MPU unit (5) by IP bus; The magnet interface (6), EM interface (7), FXO interface (8) and FXS interface (9) are on the TDM side, and are connected to the MPU unit (5) through the TDM bus; The voice communication panel (2) is a communication terminal; The network management terminal (3) realizes system monitoring and management, and the external IP network (4) is now connected to the outside world of the system; The magnet interface (6), the EM interface (7), the FXO interface (8) and the FXS interface (9) are analog user interfaces based on the TDM bus. 2. system according to claim 1, is characterized in that, described MPU (5) comprises CPU module (51), IP switching module (52), serial port processing module (53), DSP module (54), conference processing Module (55), TDM-RTP conversion module (56) and TDM switching module (57); Described CPU module (51) connects IP switching module (52), serial port processing module (53), DSP module (54), meeting processing module (55) and TDM switching module (57) respectively; Described IP switching module (52) ) are respectively connected to IP phone (1), voice communication panel (2), network management terminal (3) and external IP network (4), and are connected to TDM switching module (57) by TDM-RTP conversion module (56); The serial port processing module (53) is respectively connected to the magnet interface (6), the EM interface (7), the FXO interface (8) and the FXS interface (9) by the serial port bus; the DSP module (54) is connected to the TDM exchange module ( 57); the conference processing module (55) is connected to the TDM switching module (57) through the on-chip bus; the TDM switching module (57) is connected to the magnet interface (6), the EM interface (7), and the FXO interface respectively through the TDM bus (8) and FXS interface (9); IP exchange module (52) realizes the exchange control of speech packet; The conference processing module (55) realizes the voice mixing function between different users, supports the echo cancellation of 512 channels, and the echo cancellation duration is 32ms; TDM-RTP conversion module (56) realizes the media format conversion between RTP and TDM; The TDM switching module (57) realizes media flow conversion, distribution and integration among different users, and realizes voice transmission among different users. 3. The system according to claim 2, characterized in that the magnet interface is used to connect to the magnet phone, and can send ring current, detect external ring current incoming signal and perform voice transmission. 4. system according to claim 3, it is characterized in that, EM interface can be interconnected with EM relay between other switching networks, completes the establishment of the EM relay link between this system and external switching network, voice signal Access, signaling control and transmission; at the same time, the EM interface can be interconnected with the radio station with the EM interface to realize the voice transmission and reception control of the radio station. 5. system according to claim 4, it is characterized in that, FXO interface can be interconnected with the FXS interface of other switching networks, is used for completing the establishment of the analog trunk link between this system and the external switching network, voice signal Access, signaling control and transmission. 6 . The system according to claim 5 , wherein the FXS interface is used to connect to the analog public telephone, so as to realize voice signal access, signaling control and transmission of the analog public telephone. 7. The system according to claim 6, comprising the steps of: The CPU module in the MPU unit is initialized, and receives user registration information from the IP bus through the IP switching module, including registration information of IP phones, voice communication panels and external IP networks, and realizes resource allocation and status monitoring of IP users; the CPU module through the serial port The processing module receives initialization information from the magnet interface, EM interface, FXO interface and FXS interface, and realizes resource allocation and status monitoring of the above analog interfaces; When the IP side user issues a call request, the IP switching module receives the message and sends it to the CPU module, and the CPU module judges the type of the called party. If the called party is still an IP side user, it searches for the called routing information through the IP switching module. Establish a call; if the called party is a TDM side user, the CPU module uses the serial port processing module to send signaling information to the called party through the serial port bus, and connects the called time slot through the TDM-RTP conversion module and the TDM switching module to realize the call ; When the user on the TDM side issues a call request, the CPU module obtains the calling state parameters through the serial port processing module, processes the sending and receiving number through the DSP module, and the CPU module obtains the information of the serial port processing When the party is still a user on the TDM side, the CPU module sends signaling information to the called party through the serial port processing module, and connects to the called time slot through the TDM switching module to realize the call; if the called party is a user on the IP side, the CPU module switches The module looks up the called routing information to realize the call; When each user needs to hold a conference, the voice of the IP side user is uniformly converted into TDM format and mixed through the conference processing module, and the mixed voice is sent to the analog user interface by the TDM switching module through the TDM bus, or through the on-chip bus Send it back to the IP switching module, and publish it to the IP side user through the IP bus through the IP switching module to realize the multi-party conference function.