CN1309230C - System and method for delivery of telecom signalling messages by passing private net boundary - Google Patents

Abstract

The present invention discloses a system and a method for delivery of telecommunication signalling messages by passing private network boundary. The system comprises a plurality of IP signalling devices on different IP networks and an IP signaling gateway (IPSG) which is set in a cross-network mode. The IPSG is provided with IP addresses of different networks. The IP addresses of different networks are reliably connected by IP signaling gateway processing processes (IPSGP) of two network sides and the IP signalling device of the same network, which is used for leading signaling messages to be packed into an interlayer interface for parameter mapping and leading the signaling messages to be repacked into an IP protocol packet. The IP signalling device and the IPSG are respectively collocated with a processing relationship between the signalling message and the corresponding processing process, which determines a distribution strategy of the signalling messages. The present invention adopts the relay signaling transference of the IPSG on a private network boundary, and the signalling device is only connected with the IPSGP of the IPSG at the same network side. Therefore, a public network device and a private network device can actively establish a link, and the determined address of the opposite terminal can be provided. Simultaneously, the multiple-address connection of the devices is also supported.

Description

System and method for transmitting telecommunication signaling messages across private network boundaries

technical field

The invention relates to a method for transmitting signaling messages in the communication field, in particular to a method for transmitting traditional telecommunication network signaling on the IP Internet.

Background technique

In order to smoothly transition from the traditional telephone network to the Next Generation Network (NGN), the Internet Engineering Task Force (IETF) has developed a set of signaling transfer (SIGTRAN) protocol architecture to adapt various signaling messages in the traditional telephone network to Assigned to the IP network. The so-called adaptation refers to the stripping of the original signaling part aimed at the characteristics of the circuit switching network, and repackaging the internal interlayer interface and signaling messages into signaling protocol packets suitable for transmission on the IP network. According to the characteristics of different signaling, different adaptation protocols need to be used, so that these signaling messages can be transmitted in the IP network. After the signaling data and command packets are converted into corresponding adaptation protocol packets, they are delivered to the destination in the IP network by using a reliable transmission protocol (such as the stream control transmission protocol SCTP).

The network architecture of the next generation gateway about the transition from traditional signaling network to IP network mainly includes signaling gateway (SG) and media controller (MGC) or soft switch (SS). The role of the SG is to adapt the signaling transmitted in the traditional signaling network into IP packets and transmit it in the IP network; the role of the MGC or SS is to process these signalings.

With the rapid development of the Internet, communication networks such as telecommunication networks are gradually transitioning to IP-based next-band networks. Address resources have been increasingly unable to meet the demand. In order to solve this problem, a large number of private networks have become a supplement to the Internet. These private networks have assigned their own IP addresses to the internal devices. These internal addresses are used to communicate with internal addresses. When accessing public network devices, the internal addresses need to be converted into legal IP addresses through address translation. public address to access. In the development process of the next generation network, due to the decentralized nature of network equipment, we are also faced with the problem that the signaling gateway (SG) and soft switch (SS) or media gateway controller (MGC) are respectively in the private network and the public network, or even in the in different private networks.

Currently used address translation methods mainly include network address substitution (NAT) and network port mapping.

The principle of network address replacement is to concentrate the limited public network addresses on the NAT server at the network border. For all IP packets flowing out of the network, it is necessary to replace the private source address in the IP packet header with a legal public network address on the NAT server. , so that it can be normally transmitted in the public network, and at the same time, the mapping relationship between this pair of addresses needs to be recorded on the NAT server. For the IP packets entering the private network from the public network, it is necessary to find out the corresponding relationship from the address mapping relationship recorded on the NAT server and replace the destination address with the corresponding private network address, so that it can be completed in the private network transmission.

The method of port mapping is only suitable for applications based on IP transmission protocols such as TCP or UDP. At the same time, replace the IP source address with a public network address. This method can provide this network with a service to access the public network with a small number of addresses.

The common defect of the above two methods is that IP packets must first be sent from the private network to the public network, and only after the translation server on the network border generates an address translation relationship can the data packets from the public network be transmitted to the private network. However, when the public network device actively establishes a link with the private network device, the address or port mapping relationship has not yet been generated on the network boundary, so it cannot be successfully sent to the destination.

In addition, when the signaling gateway and the MGC are respectively in the public network and the private network, when the stream control transmission protocol (SCTP) is used as the underlying transmission protocol, there are certain problems in address translation.

Firstly, because the flow control transmission protocol supports multi-address connections, both the connection establishment message and the response message contain a list of available addresses of the local device. Therefore, when using network address replacement, it is necessary to be able to parse SCTP data packets, and then convert each available address in the available address list. If an SG has several addresses involved in transmitting signaling, it needs to be allocated on the network address translation server. Several addresses, if there are multiple SGs in the private network, the demand for public network address resources will be relatively large. When using port mapping, multi-address work cannot be supported at all. This is because an SCTP connection has only one port, and each address cannot be assigned a mapped port. Therefore, an SCTP connection can only have one address participating in the connection.

Furthermore, when the signaling device in the private network establishes an SCTP connection with the signaling device in the public network, since the public network address used cannot be determined, the SCTP server on the signaling device in the public network cannot be configured to The address of the terminal cannot be judged according to the address when receiving the connection establishment message. In this way, the public network device will be in danger of being port scanned, which will reduce the security of the system.

Furthermore, when using technologies such as network address replacement to transfer messages between the public network and the private network, the signaling device in the public network needs to know the topology of all IP signaling devices and signaling endpoints in the private network. It is necessary to configure the signaling transfer and redundancy relationship with many signaling devices in the private network. Both storage and operation require a large overhead.

Contents of the invention

The technical problem to be solved by the present invention is to provide a system and method for transmitting telecommunication signaling messages across private network boundaries. Both public network and private network devices can actively establish links, and have a definite peer address, and also support device communication. Multiple address connections.

In order to solve the above technical problems, the present invention provides a system for transmitting telecommunication signaling messages across private network boundaries, including multiple IP signaling devices located in different IP networks, characterized in that it also includes IP signaling devices across different networks Gateway, the IP signaling gateway is equipped with IP addresses of different networks, and has at least two IP signaling gateway processing processes that are composed of symmetrical protocol stacks and belong to different networks. The processing process on the IP signaling device establishes a connection, which is used to complete the sending and receiving processing of the user adaptation protocol message with the IP signaling device, and the conversion with the interface between the internal signaling layers. The IP signaling gateway is configured with The processing relationship between the signaling message and the processing process on the connected IP signaling device, and the IP signaling device is also configured with the processing relationship between the signaling message and the processing process on the connected IP signaling gateway.

The above-mentioned system may have the following characteristics: said each protocol stack includes an Internet Protocol layer, a Stream Control Transmission Protocol or Transmission Control Protocol layer, and a User Adaptation Protocol layer. When the parameters of the networks on both sides are different, at least one network interface function needs to be set on the IP signaling gateway, which is used to map the user layer messages and interface parameters handed over by the IP signaling gateway processing process on one side through the interlayer interface to another The configuration value on one side is delivered to the IP signaling gateway processing process on the other side through the same interface.

The above-mentioned system may have the following characteristics: a dynamic message distribution table is set on the user adaptation protocol layer of the IP signaling gateway processing process, and the static configuration and user adaptation protocol activation conditions are recorded, and the static configuration includes the application server identification or the definition of the port identifier, and the processing relationship table between the application server identifier or the port identifier and the processing process on the IP signaling device, and the activation status indicates which processing processes on the current IP signaling device can perform signaling processing.

The above-mentioned system may have the following characteristics: the IP signaling device is one or more of a soft switch, a media gateway controller, a signaling gateway or an IP signaling endpoint.

The above-mentioned system may have the following features: the IP signaling gateway has multiple sets of independent protocol architectures consisting of two corresponding IP signaling gateway processing processes and a network interface function, for transmitting different types of signaling.

The above-mentioned system may have the following characteristics: the IP signaling gateway is simultaneously on three or more IP networks, equipped with an IP address for each network, and each network side has at least one IP signaling gateway processing process through The reliable transport protocol establishes reliable connections with processes on IP signaling devices in the same network.

The above-mentioned system may have the following characteristics: the boundaries of the different networks are simultaneously provided with a plurality of redundant backup IP signaling gateways, and each IP signaling gateway processing process on each IP signaling gateway is also synchronized with other IP signaling gateways of the same network. The IP signaling gateway process on the signaling gateway establishes a reliable connection.

The above-mentioned system may have the following characteristics: the system includes a public network and a plurality of private networks, one or more IP signaling gateways are set at the boundary of each private network and the public network, and the IP signaling gateways in each IP private network Make the device establish a reliable connection with the IP signaling gateway processing process on the network side of the IP signaling gateway on the border of the network through a reliable transmission protocol, and at the same time establish a reliable connection between the IP signaling gateway processing processes of each IP signaling gateway belonging to the same network Reliable connection.

The present invention also provides a method for transmitting telecommunication signaling messages across private network borders, which is applied to systems with IP signaling gateways arranged at different network borders, including the following steps:

(a) IP signaling gateways respectively establish reliable connections with IP signaling devices in different networks;

(b) Each processing process on the IP signaling gateway and the processing process on the IP signaling device of the same network respectively establish a signaling adaptation transmission channel;

(c) The IP signaling device sends the user adaptation protocol packet to the IP signaling gateway, and the source address and destination address are valid IP addresses of the same network;

(d) In the processing process of the IP signaling gateway on the receiving side, the signaling message is converted into a corresponding internal interface and handed over to the processing process of the IP signaling gateway on the other side, and the interlayer interface is repackaged as an IP-based user-adapted interface. With protocol package;

(e) The IP signaling gateway processing process on the other side sends the user adaptation protocol packet to the IP signaling device, and the source address and destination address are valid IP addresses of the same network.

The above method may have the following characteristics: in the step (d), the user layer message and interface parameters are first mapped to the configuration values of the corresponding other side network, and then the IP signaling on the other side is handed over to the other side through the same internal interface Gateway process.

The above method may have the following characteristics: in the step (b), the processing process on the IP signaling gateway and the IP signaling device passes the application server state management message and the application server service management message specified in the corresponding user adaptation protocol Establish a reliable control protocol connection.

The above method may have the following features: in the steps (b) and (e), the transfer route of the signaling message is determined according to the processing relationship between the application server ID or port ID of the signaling message and the processing process.

The above method can have the following characteristics: after the step (d), the IP signaling gateway processing process that completes the encapsulation first sends the user adaptation protocol packet to another IP signaling gateway to convert and repackage the signaling message, and then Execute step (e), or perform more times of transfer and processing between two IP signaling gateways, and then execute step (e).

Said method may have the following characteristics: in said step (a), a reliable transmission protocol connection is also established between the IP signaling gateway processing processes on the same network side of a plurality of IP signaling gateways, and in step (b), A redundant backup relationship between IP signaling gateways is established through application server state management messages and service management messages.

As can be seen from the above, the present invention adopts the IP signaling gateway to relay the transmission of signaling on the border of the private network, the public network equipment only establishes a connection with the public network side of the IPSG, and the private network equipment also only establishes a connection with the private network side of the IPSG , through the IPSG to repackage and redistribute the message, forming a signaling channel from the public network signaling device to the private network signaling device. This method of segmented connection establishment overcomes the defect that public network devices cannot directly initiate connection establishment to private network devices, and can make full use of the address resources of the IP signaling gateway to establish multi-address SCTP connections in different networks, improving Connection reliability.

Furthermore, in the private network device and the public network device, if the peer address needs to be configured, the peer address is the address of the IPSG on the network side, and there is no uncertainty, thereby improving the reliability of the system. In addition, the signaling message routing distribution and redundancy strategies on both sides of the IP signaling gateway of the system of the present invention are separated, and the signaling distribution and redundancy strategies are established between the devices at both ends and the IPSG, on the one hand, different network devices are shielded On the other hand, it improves the flexibility of networking and reduces the complexity of the signaling distribution mechanism. The redundancy of the IP signaling gateway can also be used to provide redundant means for signaling transmission on both sides, thereby improving the reliability of signaling transmission and the flexibility of networking.

Description of drawings

Fig. 1 is the networking diagram of the embodiment system of the present invention;

Fig. 2 is a protocol architecture diagram of each device in Fig. 1;

FIG. 3 is a flow chart of the system in FIG. 1 implementing the transfer of signaling messages between the SS and the SG.

Detailed ways

As shown in Figure 1, the system of this embodiment includes a signaling gateway (SG) 1 located in IP network A, a softswitch (SS) 2 located in IP network B, and a crossover network across different networks set on the network boundary IP Signaling Gateway (IPSG)3. IP network A and IP network B are IPv4 private network and IPv6 public network respectively. The SS in the figure may also be a media gateway controller (MGC), and the SS and SG may also be other IP signaling devices such as an IP signaling endpoint (IPSEP), and the number of devices is not limited.

The IPSG is directly connected to the two networks and is equipped with effective IP addresses of the two networks. The SG and SS/MGC connected to the IPSG are respectively configured with the IP addresses of the IPSG on the same network. The SG and SS need to cross the boundaries of different networks to transmit the telecommunication signaling messages encapsulated in the user adaptation protocol, and the role of the IPSG is to repackage and distribute the signaling messages encapsulated in IP packets transmitted in a network. Make it possible to enter another IP network for delivery.

As shown in FIG. 2 , the protocol architecture on the IPSG in this embodiment consists of two symmetrical protocol stacks and a network interface function (NIF). Each protocol stack is composed of IP (Internet Protocol) layer, SCTP (Stream Control Transmission Protocol) layer and UAL (User Adaptation Protocol layer). Among them, the SCTP protocol is the underlying reliable transmission protocol recommended by the IETF in transmitting signaling in the IP network, and is used to ensure the reliability of signaling messages transmitted between the IPSG and the signaling at both ends. However, the Transmission Control Protocol (TCP ) or other reliable transport protocols. The User Adaptation Layer (UAL) can select different user adaptation protocols according to the types of signaling to be transmitted, and is mainly used for the conversion of signaling messages and internal interlayer interfaces, as well as routing control during the distribution of signaling messages. We compose such a group of protocols on the IPSG to complete the processing of user adaptation protocol message sending and receiving (such as encapsulation, unpacking, flow control, etc.) and the conversion between the internal signaling layer interface (DATA_REQ) The instance of the process is called IP Signaling Gateway Process (IPSGP).

As shown in the figure, two IPSGPs respectively establish SCTP connections with the application server process (ASP) on the SS and the signaling gateway processing process (SGP) on the SG located on different IP networks, and transmit them in the IP network as signaling The signaling channel between SS, IPSG and SG is actually completed by respective ASP, IPSGP and SGP. In addition, for the IP signaling endpoint (IPSEP), IPSGP establishes an SCTP connection with the IP signaling processing process (IPSP) on it.

It can be seen that in the system of this embodiment, the public network equipment only establishes a connection with the IPSG public network side, and the private network equipment also only establishes a connection with the IPSG private network side. When the connection is established, the IP address selection for transmitting the message is completed. The message is repackaged before distribution. This segmented connection establishment method does not need to replace the address between the public network and the private network, thus overcoming the defect that the public network device cannot directly initiate the connection establishment to the private network device. In addition, the multi-address implementation of IPSG and other IP signaling devices can be completed based on its underlying reliable transmission protocol SCTP. The peer address of the IP signaling device is the address of the IPSG on the network side, and there is no uncertainty, thereby improving the security of the system.

This embodiment also sets a network interface function (NIF) on the two protocol stacks, which is used to hand over the user layer information from one side IPSGP through the interlayer interface, such as the application server identification (AS identification), and the interface. Some parameter values are mapped to the values configured on the other side, and then delivered to the IPSGP on the other side through the same interface and re-encapsulated into corresponding user adaptation protocol IP packets to be sent out.

In order to realize the routing of signaling messages from SG to SS, it is necessary to configure the processing relationship between application server (AS, logical server, referring to the sum of some services) and IPSGP on the same network on SG, that is, the distribution policy of signaling messages. When the SG receives the message from the signaling side, it determines which AS the message belongs to according to some characteristic values of the signaling, such as the signaling point code, circuit ID, and interface ID, and then sends it to the corresponding IPSG according to the configured distribution strategy. . The processing relationship between AS and ASP needs to be configured on the IPSGP, so as to search for an ASP that can currently work for the AS according to the AS identifier of the signaling message, and finally determine which SS or MGC should be sent to according to the ASP. In this way, the signaling message from the telecommunication network is distributed twice on the SG and the IPSG.

On the other hand, in order to realize the routing of signaling messages from SS to SG, the processing relationship between signaling messages and IPSGP on the same network is also configured on SS to determine its routing from SS to IPSG. The IPSGP also needs to configure the processing relationship between the signaling message and the SGP, so as to determine the transfer route of the signaling message from the IPSG to the SG.

The configuration of the above-mentioned processing relationship on the IPSG is realized through two dynamic message distribution tables on the user adaptation protocol layer of the IPSGP. The distribution table is used to manage the distribution of signaling messages, including static configuration, user adaptation protocol activation, and signaling processing methods. Among them, the static configuration mainly includes the definition of AS, the processing relationship table between AS and ASP list (configured on the IPSGP on the same side as SS) or AS and SGP list (configured on the IPSGP on the same side as SG), and corresponding policies The weight; the activation status indicates which ASPs or SGPs are currently active and can perform signaling processing; the signaling processing mode indicates the way the ASP uses to activate signaling processing, such as load sharing or replacement mode.

Since the IPSG has respectively established user adaptation protocol layer connections with the signaling devices on both sides, the routing distribution and redundancy policies of the signaling messages on both sides are separated. Establish signaling distribution and redundancy policies between the devices at both ends and the IPSG respectively. In this way, on the one hand, the existence of different network devices is shielded, on the other hand, the flexibility of networking is improved, and the complexity of the signaling distribution mechanism is reduced. In addition, by utilizing the redundancy of the IPSG, redundant means can be provided for signaling transmission on both sides, thereby improving the reliability of signaling transmission and the flexibility of networking.

Based on the above system, taking the signaling transfer between SS and SG as an example, the protocol flow of telecom network signaling crossing the private network boundary is shown in Figure 3, including the following steps:

Step 101, the IPSGP 201 on the same network side on the softswitch SS 204 and IPSG 205 establishes an SCTP connection;

Step 102, SS 204 sends an UP message in the user adaptation protocol to IPSGP 201; (the UP message is an application server state management message specified in the user adaptation protocol of this embodiment, and is used to establish a signaling adaptation delivery channel)

Step 103, IPSG 205 responds UP ACK message to SS 204;

Step 104, SG 203 and IPSG 205 establish an SCTP connection at the processing process IPSGP 200 on the same network side;

Step 105, IPSGP 200 sends the UP message in the user adaptation protocol to SG 203;

Step 106, SG 203 responds UP ACK message to IPSGP 200;

Step 107, SS 204 sends ACTIVE message to IPSGP 201, and carries AS sign, and the ASP of indication sending message can provide the service of this business; for activation signaling adaptation transfer channel)

Step 108: After receiving the ACTIVE message from SS 204, IPSGP 201 converts it into an interlayer interface, and the NIF maps the AS identifier to the corresponding value on the IPSGP 200 side, and indicates to IPSGP 200 that the corresponding service can be activated;

Step 109, IPSGP 200 re-encapsulates the interface between signaling layers into a corresponding ACTIVE message, and sends it to SG 203;

Step 110, SG 203 responds ACTIVE ACK message to IPSGP 200;

Step 111, after receiving the ACTIVE ACK sent back by SG 203, IPSGP 200 modifies the message distribution table on the IPSGP, activates the SGP in the AS-related SGP list (i.e. the SGP that sends ACTIVE ACK), and maps the AS identifier to IPSGP The corresponding value on the 201 side indicates the corresponding service activation confirmation to IPSGP201;

Step 112, after IPSGP 201 receives the acknowledgment indication from IPSGP 200, revise the message distribution table on this IPSGP, activate the ASP (that is, send the ASP of ACTIVE) in the relevant ASP list of described AS, produce ACTIVE ACK message simultaneously and send back SS 204;

Through the above steps, the signaling adaptation transmission channel between the SS and the SG is established. When the SS sends the IP protocol packet to the SG, it proceeds as follows:

Step 113, SS 204 sends the signaling message (such as: Data Request message) that is encapsulated in the protocol packet to IPSGP 201, and at this moment, destination address in the IP packet is the address of this network side of IPSG 205, and the source address is the address of SS 204;

Step 114, IPSGP 201 translates the message into an interlayer interface and delivers it to the network interface function NIF202;

Step 115, NIF 202 maps the parameters in the interface to the value configured on IPSGP 200, and then delivers it to IPSGP 200 through the same interlayer interface;

Step 116, IPSGP 200 translates the interlayer interface into a signaling message (Data Request message) encapsulated in the protocol packet and sends it to SG 203. At this time, the destination address in the IP packet is the address of SG 203, and the source address is IPSG 205 at the address of the network side;

On the other hand, when SG 203 sends protocol packet to SS 204, proceed as follows:

Step 117, SG 203 sends the signaling message (such as: Data Indication message) that is encapsulated in the protocol packet to IPSGP 200, and now the destination address in the IP packet is the address of the network side of IPSG 205, and the source address is the address of SG 203;

Step 118, IPSGP 200 translates the message into an interlayer interface and delivers it to the network interface function NIF202;

Step 119, NIF 202 maps the parameters in the interface to the value configured on IPSGP 201, and then delivers it to IPSGP 201 through the same interlayer interface;

Step 120, IPSGP 201 translates the interlayer interface into a signaling message (Data Indication message) encapsulated in the protocol packet and sends it to SS 204. At this time, the destination address in the IP packet is the address of SS 204, and the source address is IPSG 205 in The address of the network side.

When different user adaptation protocols are used, the messages used to establish the transfer channel may be different, but the processing flow is the same. For example, when IPSGP 201 receives the INACTIVE message (deactivation message) sent by SS, it also maps the AS identifier in the INACTIVE message to the AS identifier on the other side. IPSGP 200 generates the INACTIVE message and sends it out, and waits for the SG to return the INACTIVE ACK message , and then map the AS identifier in the INACTIVE ACK message to the AS identifier on the SS side, and then generate an INACTIVE ACK message and send it to the SS. At the same time, it is necessary to change the message distribution tables on the two IPSGPs.

In some signaling adaptation protocols, the concept of application server (AS) is not proposed, but ports are simply used to distinguish different applications. At this time, the AS identification in the process can use the port identification.

Based on the basic scheme of the present invention, many transformations can be carried out, for example:

An IPSG can simultaneously serve as a device for different signaling (such as No. 7 signaling, Digital Subscriber No. 1 signaling, V5 signaling, signaling connection control part, etc.) across the border of the private network. Establish an independent protocol architecture for each signaling transmission, that is, two IPSGPs and one NIF. IPSGPs using different types of signaling adaptation protocols on the same side are connected to corresponding IP signaling devices. In this way, IPSG Different kinds of signaling can be transmitted at the same time.

An IPSG can also span multiple IP networks at the same time, and is equipped with an IP address for each network. The IPSGP on each network side establishes a reliable connection with the IP signaling device in the same network through the SCTP protocol to simultaneously complete two Cross-network transfer of signaling messages between IP signaling devices on the above network.

There can be multiple IPSGs with backup and redundancy in the system. At this time, the IPSGPs at both ends of an IPSG need to establish SCTP connections with the IPSGPs on the same network on other IPSGs at the same time, and use the application server status management message (ASPSM) and application server service management The message (ASPTM) establishes a redundant backup relationship between IPSGs, and performs load sharing or other redundant backups for signaling messages that need to cross the private network boundary.

When the system includes a public network and more than two private networks, one or more IPSGs are set at the boundary of each private network and public network, and the IP signaling devices in each IP private network communicate with each other through a reliable transmission protocol. On the IPSG at the border of the local network, the IPSGP on the network side establishes a reliable connection, and at the same time, the IPSGPs whose IP signaling gateways belong to the same network also establish reliable connections. In this way, signaling messages can be transmitted across the public network between two private networks that are not connected to each other.

When there are more different networks, one or more IPSGs can be set at the borders of each network, and SCTP connections can be established with the IP signaling devices of the two networks they span, and SCTP can be established between the IPSGs in a cascade manner. Connection to realize the transmission of signaling across multiple networks.

Claims (13)

1. A system for transmitting telecommunication signaling messages across private network boundaries, comprising a plurality of IP signaling devices located in different IP networks, characterized in that it also includes IP signaling gateways across different IP networks, the IP signaling The gateway is equipped with IP addresses of different IP networks, and has at least two IP signaling gateway processing processes composed of symmetrical protocol stacks belonging to different IP networks, each of which communicates with the IP signaling devices in the same IP network through a reliable transmission protocol The processing process on the network establishes a connection for completing the sending and receiving processing of the user adaptation protocol message with the IP signaling device, and the IP signaling gateway processing process converts the signaling message through the interface between internal signaling layers, The IP signaling gateway configures the processing relationship between the signaling message and the processing process on the connected IP signaling device, and the IP signaling device also configures the processing relationship between the signaling message and the processing process on the connected IP signaling gateway. 2. The system according to claim 1, wherein each protocol stack includes an Internet protocol layer, a flow control transmission protocol or a transmission control protocol layer, and a user adaptation protocol layer, and the IP signaling gateway also includes It includes at least one IP network interface function, which is used to map the user layer messages and interface parameters handed over by the IP signaling gateway processing process on one side through the interlayer interface to the corresponding configuration values on the other side, and then deliver them to the other side through the same interface. Describe the IP signaling gateway processing process on the other side. 3. The system according to claim 2, wherein a dynamic message distribution table is set on the user adaptation protocol layer of the IP signaling gateway processing process, recording static configuration and activation of the user adaptation protocol, The static configuration includes the definition of the application server identification or port identification, and the processing relationship table between the application server identification or port identification and the processing process on the IP signaling device, and the activation status indicates which current processing processes on the IP signaling device Processes can process signaling. 4. The system according to claim 1, wherein the IP signaling device is one or more of a softswitch, a media gateway controller, a signaling gateway or an IP signaling endpoint. 5. The system according to claim 2 or 3, wherein the IP signaling gateway has multiple independent protocol frameworks consisting of two corresponding IP signaling gateway processing processes and an IP network interface function , used to transmit different kinds of signaling. 6. The system according to claim 1, 2 or 3, characterized in that, the IP signaling gateway spans three or more IP networks at the same time, is equipped with each IP network address, and each At least one IP signaling gateway processing process on the IP network side establishes a reliable connection with the processing process on the IP signaling device in the same network through a reliable transport protocol. 7. The system according to claim 1, 2 or 3, wherein the boundaries of the different IP networks are simultaneously provided with a plurality of redundant backup IP signaling gateways, each IP signaling gateway on each IP signaling gateway The signaling gateway processing process also establishes reliable connections with the IP signaling gateway processing processes on other IP signaling gateways on the same IP network. 8. The system according to claim 1, 2 or 3, characterized in that the system includes a public network and multiple private networks, and one or more IP addresses are set at the boundary of each private network and public network Signaling gateway, the IP signaling equipment in each IP private network establishes a reliable connection with the IP signaling gateway processing process on the IP network side of the IP signaling gateway on the border of the network through a reliable transmission protocol, and each IP signaling gateway belongs to Reliable connections are also established between IP signaling gateway processing processes on the same IP network. 9. A method for transmitting a telecommunication signaling message across a private network boundary, applied to a system provided with an IP signaling gateway at the boundary of different IP networks, comprising the following steps: (a) IP signaling gateways respectively establish reliable connections with IP signaling devices in different IP networks; (b) Each processing process on the IP signaling gateway and the processing process on the IP signaling device of the same IP network respectively establish a signaling adaptation transfer channel; (c) The IP signaling device sends the user adaptation protocol packet to the IP signaling gateway, and the source address and the destination address are valid IP addresses of the same IP network; (d) in the IP signaling gateway processing process on the receiving side, the signaling message is handed over to the IP signaling gateway processing process on the other side through the internal interlayer interface, and the IP signaling gateway processing process on the other side sends the signaling message to the IP signaling gateway processing process on the other side. The message is re-encapsulated as an IP-based user adaptation protocol packet; (e) The IP signaling gateway processing process on the other side sends the user adaptation protocol packet to the IP signaling device, and the source address and destination address are valid IP addresses of the same IP network. 10. The method according to claim 9, characterized in that, in the step (b), the processing process on the IP signaling gateway and the IP signaling device passes the application server state specified in the corresponding user adaptation protocol The management message and the application server service management message establish a reliable control protocol connection. 11. The method according to claim 10, characterized in that, in the steps (b) and (e), the signaling message is determined according to the processing relationship between the application server ID or port ID of the signaling message and the processing process Pass routing. 12. The method according to claim 9, characterized in that, after said step (d), the encapsulated IP signaling gateway processing process first sends the user adaptation protocol packet to another IP signaling gateway for signaling The conversion and re-encapsulation of the message, and then step (e), or more times of transmission and processing between two IP signaling gateways, and then step (e). 13. The method according to claim 9, characterized in that, in the step (a), a reliable transport protocol connection is also established between the IP signaling gateway processing processes on the same IP network side of a plurality of IP signaling gateways , and in step (b), a redundant backup relationship between IP signaling gateways is established through application server state management messages and service management messages.

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