KR20000011116A - System for converting a routing address within a telecommunications network - Google Patents

Abstract

PURPOSE: A system for converting a routing address within a telecommunications network is provided to route a transferred signal through Signaling System NO.7 network without a point code and subsystem number. CONSTITUTION: The system for converting a routing address within a telecommunications network converts a point code and subsystem number representing the calling party address to global title number. The converter signal transfer point connecting a first Signaling System NO.7 network with a second Signaling System NO.7 network is converted global title number confronting a point code and subsystem number which is represented a calling party address in the called party address. When the converted global title number represents a first node in a first Signaling System NO.7 network generating signal and a return signal is called by the converter signal transfer point using the converted global title number as a called party address, the converter signal transfer point converts the global title number back to the original point code and subsystem number. The converter signal transfer point transfers the return signal using a point code and subsystem number as the called party address to a first node.

Description

Routing Address Translation System in Communication Network

This application is related to US patent application Ser. No. 08 / 630,355, filed April 10, 1996, entitled "A Network Protocol Conversion Module Within A Telecommunication System" by Jan Lindquist et al.

Conventional communication exchangers are complex digital processors with a majority of devices, signal terminals and most importantly software and hardware modules that provide communication services to communication users. With the development of the above mentioned digital processor and common line signaling (CCS) network systems, conventional communication exchanges can support and carry more than just voice data. Such data includes video images, control signals, or application specific information. An example of such an application may be credit card verification data communicated over an existing communications network to verify a customer's credit card number.

In order for two or more communication exchanges to exchange data with each other, all parties in a "conversation" must agree on a particular communication protocol. The protocol must be strictly followed by each party in order to deliver the data to the right place in a timely and correct manner and to communicate the data recognizable to the end user in a conversation or conference over the network. As a result, in the modern telecommunications industry, standard communication systems are linked to each other using protocols based on Open System Interconnections (OSI).

The OSI model is the only internationally accepted standard structure for communicating between different systems made by different manufacturers. OSI's goal is to create an open system networking environment in which a manufacturer's computer system connected to a network can freely share data with other computer systems in the network. However, the fact that a system is "open" does not mean a specific protocol or specification. Rather, OSI adapts to the higher level OSI layer with a conceptual and functional structure that allows and supports users to develop their own communication specifications. The widely accepted OSI standard for long distance communications was Common Line Signaling (CCS). In particular, the most commonly used technique for performing CCS in the United States was signaling system No. 7 (SS7). However, it should be recognized that within the same SS7 communication protocol there are other mechanisms for transferring signals from the source node to the destination node.

There are basically two different ways to route signals in the SS7 network. First, routing may be based on a combination of point code (PC) and subsystem number (SSN) (hereinafter collectively called PC / SSN). When a PC / SSN is provided for signaling, each participating node (signal relay point (STP), etc.) in the serving network must have data forming that specified PC / SSN. Therefore, when a signal is received as a particular PC / SSN, each transport node in the serving network knows exactly where and to whom to send the signal.

As an alternative, the signal can also be routed using the global title number. When the node generating the signal does not know the PC / SSN associated with the destination node, the global title number should be used for routing purposes. Only each transport node that connects the source node with the destination node knows to advance its received signal with a particular global title number towards a given network or direction. At some point, the correct PC / SSN must be provided so that the signal can reach its final destination. This function is known as global title translation and is usually performed by an STP adjacent to the destination node. Since all other intermediate nodes except the adjacent STP only propagate the signal in the right direction, the intermediate transfer node need not contain data forming the destination node indicated by the received global title number.

For example, at the IEEE International Conference on Communications in April 1990, the name "Interconnecting SS7 Signaling Network" by Aida A. El-Toumi and Michael A. McGrew refers to a system in which point codes and SSNs are not provided to other networks. To start. Instead, the global title of the originating address is provided. The global title can be used as a receiving side address in the response signal. U.S. Patent No. 5,282,244 to Fuller et al. Initiates a virtual signaling network by interconnecting signal relay points between other networks, where signaling messages are converted in accordance with the stored conversion table. Similarly, the IEEE Bulletin of April 1992 and the name "Routing and Congestion Control in Common Channel Signaling System No. 7" by Bijan Jabbari initiates the conversion of global title addresses into subsystem numbers and point codes.

If a PC / SSN associated with a particular node in the SS7 network is formed through the SS7 network (all nodes participating in the SS7 network have data that correlates the PC / SSN with the particular node), then the signaled PC / SSN is used. Rooting becomes more efficient and direct. The signal sent by the source node is routed directly to the specified destination node because all intermediate nodes connecting the source node with the destination node know where and how to send the signal. However, since the PC / SSN is not formed over the SS7 network, the signal must be routed using the global title number only when the signal reaches a particular transport node containing the associated PC / SSN that forms the data. Such global title conversion is inefficient and slows signal routing.

When a signal is communicated from a first node in a first SS7 network to a second node in a second SS7 network, the PC / SSN associated with the first node is included in the signal as the receiving side address Cdpa. Such a receiving address is later used by the second node in the second SS7 network to return the signal back to the first node. However, if all intermediate nodes in the second SS7 network are not formed with a PC / SSN value representing the first node, routing through the second SS7 network is not possible. On the other hand, the first node is inefficient at all times transmitting all its signals using the global title number as the receiving address because it slows down signal routing and indicates additional processing time from each intermediate node in the first SS7 network. Because.

Thus, it is an advantage to have a conversion system for routing signals transmitted as PC / SSN over SS7 networks that do not have a specified PC / SSN formed.

The present invention relates to the communication of application layer signals over other networks, and in particular to point code and sub in application layer signals transmitted from the first signaling system No. 7 (SS7) network to a global title number that is rootable in the second SS7 network. Related to the translation of system numbers.

1 is a block diagram illustrating a typical signaling system No. 7 (SS7) communication network.

2 is a block diagram illustrating another layer within an SS7 communication system.

3 is a network structure diagram illustrating a typical SS7 communication network connecting a source node with a destination node.

4 is a block diagram illustrating a logical routing path obtained by a signal using a point code and a subsystem number as an addressing mechanism.

5 is a block diagram illustrating a possible routing path obtained by a signal using a global title number as an addressing mechanism.

6 is a block diagram illustrating routing inconsistencies that exist when a first SS7 network using a PC / SSN is interfaced with a second SS7 network using a global title number.

7 is a block diagram illustrating a conversion module that interfaces with a Signaling Connection Control Part (SCCP) module that translates a receiving side address in a signal communicated between first and second SS7 communication networks.

FIG. 8 is a block diagram illustrating a converter signal relay point (STP) connecting a first SS7 network with a second SS7 network and converting point codes and subsystem numbers in a received signal into corresponding global title numbers.

The present invention corresponds to a point code and a subsystem number (PC / SSN) indicating the originating address for a particular signal in order to be able to transport the signal over a signaling system No. 7 (SS7) network having no specific PC / SSN formed. A method and an apparatus for converting to a global title number are disclosed. A converter signal relay point (STP), which connects the first SS7 network with the second SS7 network, converts the PC / SSN representing the originating address into a corresponding global title number in the received signal. The converted global title number indicates the first node in the first SS7 network generating the signal, and when the return signal is later received by the converter STP using the converted global title number as the receiving address, the converter STP is Convert the global title address back to the original PC / SSN. The converter STP sends a return signal to the first node using PC / SSN as the receiving side address.

In another embodiment, the global title number converted by the translator STP represents a translator STP on behalf of the first node in the first SS7 network. Each time the received signal is converted and transmitted by the converter STP, the received PC / SSN is also encapsulated with one of the optional Signaling Connection Control Part (SCCP) parameters within the transmitted signal. When the return signal uses the translated global title number as the receiving number and also encapsulates the original PC / SSN also later by the converted STP, the converter STP retrieves the encapsulated PC / SSN, The return signal using the extracted PC / SSN as the receiving side address is advanced to the first node.

A more complete understanding of the method and apparatus of the present invention may be made with reference to the following detailed description when taken in conjunction with the accompanying drawings.

1 is a diagram showing a portion of a typical signaling system No. 7 network in which the present invention may be implemented. With the advent of digital exchanges, common line signaling (CCS) has quickly become a good way to handle call connections in circuit-switched networks. The most commonly used technology for implementing CCS in the United States was initially created by the Consultative Committee on International Telephone & Telegraph (CCITT) and later modified by the American National Standards Institute (ANSI) (SS7). Was. In order to perform routing and signaling functions in the network, a message must be sent from the first node 10A, such as the local exchange A, to the second node 10B via a packet-switched signaling network. Dual Signal Relay Points (STPs) 270A and 270B are designed to provide reliable signaling message transfer by always providing one or more signal links 275 between any two nodes.

The signal containing the application layer data is carried in a series of networks without establishing a physical connection between the source node and the destination node (the node has a local exchange, database, or other signaling device connected as part of the network). . Unlike a channel carrying voice data, each separated packet is routed separately to its destination node. Thus, each signal correctly forwards the packet to the destination node, including the source and destination addresses destined for the STPs. Data required by an application layer module, such as credit card verification procedures or Class Automatic Callback characteristics, is encapsulated into a Transaction Capable Application Part (TCAP) message signal or another application layer signal, and from one node to the network. Is transported towards another node. In particular, the Signaling Connection Control Part (SCCP) parameter in each signal header is populated with the necessary source and destination addresses to enable the signal to travel across a series of networks.

2 is a block diagram illustrating another layer in a typical SS7 communication system. In accordance with the layer structure of the Open System Interface (OSI), the SS7 communication system also consists of multiple system layers. Basically, SS7 has two parts, a user part and a message transfer part. The message transfer unit (MTP) 300 is the lowest layer of the SS7 network system and is used to basically transfer data from one point to another in the network. The user part has several changes. An example of such a user portion includes a telephone user part (TUP) 360 for basic telephone service and an integrated ISDN user portion (ISP) 350 for combined voice, data and voice services. . The user portion is also not connected using MTP 300 but also provides a sequenced transfer service. The application 340 at the very highest layer of the SS7 network uses application layer data using the Transaction Capabilities Applications Part (TCAP) layer 330 and the Signaling Connections Control Part (SCCP) layer 310. Transfers from one application to another application via MTP 300. The applications can also use their own proprietary message signal to interface directly with the SCCP layer 310 to communicate application layer data from one application to another.

The purpose of the SCCP 310 is to provide means for end-to-end routing. Thus, the SCCP 310 processes the particular address within a particular signal and delivers the data appropriately to that particular destination. The addressing information is used by the MTP 300 at each signal point, such as a signal relay point (STP), to determine the communication link to use.

3 is a network illustrating a typical SS7 communication network connecting a first node, such as a mobile switching center / visitor location register (MSC / VLR) 10A, with a destination node, such as a home location register (HLR) 20B. It is a structural diagram. As illustrated, whenever using a mobile communication system, whenever a mobile station moves to a new MSC / VLR area, the serving MSC / VLR 10A communicates with the HLR 10B associated with the mobile station to transfer the current location of the mobile station to the HLR 10B. Inform. If the mobile station is currently located away from its home public land mobile network (PLMN), the MSC / VLR 10A in service is a node connected to the SS7 network that is different from the one connecting the home HLR 10B. The MSC / VLR 10A communicates with the home HLR 10B via a number of intermediate nodes 270 that connect the MSC / VLR 10A with the HLR 10B. The receiving side address in the signal sent by the MSC / VLR 10A should allow the intermediate node to recognize the HLR 10B as the destination node and thus advance the transmitted signal to the right destination. To facilitate the transfer of the return signal back from the second node to the first node, the originating address specified by the MSC / VLR 10A also causes the intermediate node to transfer the signal later through the second SS7 network. You should be able to.

There are basically two ways to route signals into the SS7 network. Initially, signal routing can be based on a combination of point code (PC) and subsystem number (SSN) (hereinafter collectively called PC / SSN). As an alternative, the signal can also be routed using the global title number. Although the PC / SSN used is the most direct and efficient way to route the signal, neither SS7 network can route the signal using a particular PC / SSN.

4 is a block diagram illustrating a logical routing path obtained by a signal over an SS7 network while using PC / SSN as an addressing mechanism. When the PC / SSN is provided as the receiving side address (Cdpa), all participating nodes connecting the source node with the destination node in the serving SS7 network 20 (not shown in FIG. 4 but indicated by 270 in FIG. 3). Must contain data that forms a particular PC / SSN. As a result, each intermediate participating node receiving the signal as a particular PC / SSN knows exactly how and where to send the signal. Thus, assuming all links are up and available, logical path 30 illustrates the signal path obtained by the SS7 network to communicate signals between the serving MSC / VLR 10A and home HLR 10B. do.

Routing via a particular PC / SSN is an efficient and direct way to send signals within the SS7 network, but such routing is not possible unless all of the intermediate nodes involved in that particular SS7 network contain data forming a particular PC / SSN. Usually, it is not a problem to require the first SS7 network to form data identifying each source and destination node within the first SS7 network. However, it is not always possible or desirable to require the first SS7 network to form data identifying all nodes connected to the second SS7 network.

Alternatively, the signal can also be routed via the global title number. Thus, FIG. 5 is a block diagram illustrating a possible routing path obtained by the SS7 network for communicating signals using the global title number. Global title numbers, such as directory numbers dialed by communication subscribers, do not accurately indicate where the destination node is. Each intermediate node (not shown in FIG. 5, but indicated by 270 in FIG. 3) in the serving SS7 network does not contain data correlating a specific global title number as a particular node. However, by analyzing the relevant portion of the received global title number, each intermediate node can advance the received signal at least in the right direction. For example, if a signal comprising 214-555-1212 is received by the signal relay point (STP) as the receiving side address, the STP cannot determine the exact location of the particular destination node. However, by analyzing the first three digits that are part of the global title number, the STP can confirm that the signal needs to go to the Texas area, Dallas. Once it reaches the STP in Dallas, Texas, the other STP analyzes the following three numbers to determine the appropriate sub-region within Dallas, Texas. Eventually it arrives at the intermediate node and the adjacent STP, which is usually connected to the final destination node that recognizes the received global title number, converts the global title number to the corresponding PC / SSN and advances the signal to the final destination node.

Subsequently, if the MSC / VLR 10A in service transmits a signal using a specific global title number indicating the home HLR 10B as a receiving side address in the SS7 network 20, then the SS7 network 20 in service is transmitted. All possible routing paths are illustrated by logical path 30. Instead of establishing a direct connection between the serving MSC / VLR 10A and the home HLR 10B, each intermediate node in the serving SS7 network 20 sends a signal in the right direction (arrow 40 indicated in the logical direction). Just proceed. At some point, the PC / SSN is provided and the signal is passed to its final destination node. Signal routing using global title numbers is inefficient and disturbing because each intermediate transport node must analyze the received global title number. However, due to storage capacity and maintenance, the first SS7 network does not normally store data forming external nodes connected to other SS7 networks. Therefore, a signal is transmitted toward an external node connected to another SS7 network, and a global title number addressing mechanism is required.

6 is a block diagram illustrating a routing mismatch that exists when a first SS7 network using a PC / SSN is interfaced with a second SS7 network using a global title number. The second SS7 network 20B does not include data forming a PC / SSN associated with the first node 10A in the first SS7 network 10A. When the first node 10A in the first SS7 network transmits an application layer signal to the second node 10B in the second SS7 network, the global title number representing the second node 10B is used as the receiving side number. . However, to facilitate proper delivery of the return signal back to the first node 10A, the signal sent by the first node 10A further includes its own PC / SSN as the source address. Since the global title number can be routed to all of the SS7 networks, a signal using the specified global title address as the receiving side address is properly routed from the first node 10A to the second node 10B. If the second node 10B wants to send a return signal back to the first node 10A in response to receiving the signal, the originating address in the received signal is used as the receiving side address for the return signal. However, the receiving address is PC / SSN. Since the intermediate transport node in the second SS7 network 20B does not contain data forming the specified PC / SSN, the return address can be properly routed back to the first SS7 network 20A.

Accordingly, there is a need for a conversion system for converting a specified PC / SSN into a corresponding global title number, in which the first SS7 network can route a signal using the specified PC / SSN as a routing address and a second SS7. The network can route the same signal using the translated global title number as the routing address.

In accordance with the teachings of the present invention, FIG. 7 is a block diagram illustrating a conversion module that interfaces with a Signaling Connection Control Part (SCCP) module that translates a receiving side address in a signal communicated between first and second SS7 communication networks. . The first SS7 network MTP layer 300A physically transmits a signal from the first SS7 network and interfaces with the first SS7 network SCCP module 310A. The first SCCP module 310A retrieves the signal from the first MTP layer 300A and advances it to the conversion module 50. Thus, in response to the dynamic value stored in the conversion table or register 60, the conversion module 50 changes the received PC / SSN representing the source node to the corresponding global title number. A signal having the translated source address SCCP parameter and containing the same application layer data is transmitted to the second SS7 network and forwarded to the destination application node. Thus, the converted signal is interfaced with the second SS7 network SCCP module 310B. The second SCCP module 310B alternately interfaces with the second SS7 network MTP layer 300B which physically transfers the signal to the destination node. The translated source address is later used by the destination node to send a return signal back to the source node.

During all conversion and interface processes, only the SCCP layer data in the signal header is processed by the conversion module, and all other layer data, including the TCAP data, is reliably transferred through the conversion module.

8 is an exemplary embodiment of the present invention. The converter STP 40 connects the first SS7 network 20A with the second SS7 network 20B. In normal telephone services, including call set-up and voice data communication, no converter is required. In normal telephone connections, signals such as ISUP or TUP do not require SCCP parameters. However, application layer data encapsulated in signals using SCCP parameters, such as Mobile Application Part (MAP) signals communicated between the MSC / VLR and the HLR, are transferred by the conversion module 50 in the converter STP 40. Intercepted and converted. The signal is intercepted and advanced to the conversion module 50 according to the method described in FIG. 7.

The conversion module 50 in the converter STP 40 converts the received PC / SSN value into a corresponding global title number by referring to a conversion table 60 which stores the global title number and its cross-referenced pointer. . Exemplary conversion table or register 60 is

Standard label SCCP Parameters & Values 1 SS7 TT = 3 ＊ Other SCCP parameters 2 SS7 PC = 8-9-1 SSN = 5 3 SS7 TT = 0NP = 7NA = 4GTS = 8134445555 (GTS identifying 8-9-1)

It is provided.

Using this entry, the PC / SSN SCCP parameter values are also cross referenced and Table 2:

First SS7 2nd SS7 1 SS7 1 SS7 (no change) 2 SS7 3 SS7

Is converted into the corresponding global title number.

In FIG. 8, the first node 10A having an SSN value of 5 generates an application layer signal (first signal) while connected to the first SS7 network 20A having a PC value of 8-9-1. Therefore, the source address for the first signal is PC = 8-9-1 and SSN = 5. The user input receiving side address specifying the destination node is for example TT = 3; And global title number = 051122214 also needs to be specified by the SCCP parameter. Using the receiving side address specified in the global title number format, the first SS7 network 20A can route the first signal towards the converter STP 40. Once the first signal comprising the source address and the destination address is received by the converter STP 40, the received source address and the destination address are converted according to Tables 1 and 2 above.

In the receiving side address SCCP parameter value, since TT = 3 corresponds to 1 SS7 label, the conversion is specified by the first row of Table 2 and is not performed. The conversion module 50 assumes that the receiving address is already in the global title number format and no conversion needs to be performed. Since the receiving side address indicating the second node 10B in the second SS7 network 20B has been properly specified by the user, the first signal can be transferred to the final destination.

On the other hand, the originating address is not used by the second SS7 network to convey the first signal to the second node 10B. However, if the second node 10B wishes to continue to return messages back to the first node 10A, the surrounding source address is used as the receiving side address for the new return signal. As described previously, since the specified PC / SSN representing the first node 10A in the first SS7 network 20A is not formed in the second SS7 network 20B, the received PC / SSN is referred to as the receiving address. Routing of the return signal to use as is not possible. Therefore, for the purpose of facilitating the proper delivery of the resulting message back to the first node 10A, the conversion module 50 is adapted to the PC in accordance with the teachings of the present invention while transmitting the first signal to the second node 10B. Converts the calling party address stored in the / SSN format to the corresponding global title number format.

The calling party address specified by the first node 10A has SSN = 5 and PC = 8-9-1. Since the particular PC / SSN is a 2 SS7 label, the SCCP parameter values are converted as specified by the second row of Table 2.

Therefore, when using Tables 1 and 2, the source address Cgpa and the destination address Cdpa of the first signal are

Cdpa: TT = 3 Cgpa: PC = 8-9-1

From GTN = 051122214 SSN = 5

Cdpa: TT = 3 Cgpa: TT = 8

GTN = 051122214 GTN = 8134445555 is converted.

Subsequently, when the second node 10B in the second SS7 network 20B sends a return signal back to the first node 10A, the next SCCP receiving side address and the calling side address are sent to the second node 10B. Is sent back and received by the converter STP 40. In other words,

Cgpa: TT = 3 Cdpa: PC = 8-9-1

GTN = 051122214 SSN = 5

As enumerated above, the Cgpa and Cdpa SCCP parameter values for the first signal are exchanged to provide the Cdpa and Cgpa parameter values for the return signal. When using the converted global title number as the receiving side address, the return signal is suitably routed from the second node 10B to the converter STP 40 via the second SS7 network 20B. Once the return signal is received by the conversion module 50, in order to facilitate more direct signal movement through the first SS7 network, the received receiving address is originally indexed by indexing Tables 1 and 2 above. Is converted back to the PC / SCCP parameter value. Therefore, the originating address and the receiving address are

Cdpa: PC = 8-9-1 Cgpa: TT = 3

SSN = 5 GTS = 051122214.

When using the inverted receiving side address in the PC / SSN format, the converter STP 40 can efficiently and efficiently send the return signal directly to the first node 10A via the first SS7 network 20A.

As another embodiment of the invention, the conversion module 50 in the converter STP 40 to reduce the storage capacity required by the converter STP 40 to store all possible PC / SSN combinations as their corresponding global title numbers. ) Converts the PC / SSN SCCP parameter values in the received signal into global title numbers representing the converter STP 40. By transmitting the first signal with the global title number representing the converter STP 40 as the source address, the continuous return signal sent by the second node 10B is routed back to the converter STP 40. While transmitting the first signal to the second node 10B, the PC / SSN SCCP parameter value received from the first node 10A as the source address is an optional SCCP not used by the second SS7 network 20B. It is also encapsulated as a parameter. The optional parameter is included on the return signal from the second node 10B without being processed by the second node 10B. Thus, the original PC / SSN SCCP parameter value is " piggy backed " with the first signal when transmitted from the converter STP 40 to the second node 10B. When determined to send a return signal, the received PC / SSN SCCP parameter value is returned to converter STP 40 by "addition" to the sent return signal. Once the " added " PC / SSN value is received by the converter STP 40, instead of using Table 1 above to perform the conversion, the encapsulated PC / SSN value is returned by the conversion module 50. It is withdrawn from the signal and transmitted as the receiving side address through the first SS7 network.

By using the global title number assigned to translator STP 40 as the source address, the translation module 50 does not need to internally store all possible combinations of PC / SSN values as the corresponding global title numbers.

While preferred embodiments of the method and apparatus of the present invention are illustrated in the accompanying drawings and described in the foregoing detailed description, it is understood that the present invention is not limited to the disclosed embodiments, but many rearrangements, modifications, and substitutions are possible. Therefore, the present invention should be construed as described and defined by the following claims.

Claims (21)

In a method for communicating signals between a first node in a first signaling system No. 7 (SS7) network and a second node in a second SS7 network, the first SS7 network and the second SS7 network are converter signal relay points (STP). And the signal includes a point code and a subsystem number representing the first node as an originating address, wherein the point code and the subsystem number are routable within the first SS7 network, but the second SS7 Cannot route in the network, Receiving the signal from the first node by the translator signal relay point (STP), wherein the signal includes the point code and subsystem number representing the first node as the source address; Converting the received point code and subsystem number into a rootable global title number in the second communication network by the translator STP and replacing the global title number of the signal with the calling party address; And transmitting the signal from the converter STP to the second node through the second SS7 network. 2. The method of claim 1, wherein said translator STP comprises an international gateway STP. The method of claim 1, wherein the step of converting to the global title number comprises converting to a global title number representing the first node in the first SS7 network. Signal communication method. 4. The method of claim 3, wherein the return signal transferred through the second SS7 network uses the global title number as a receiving side address and sends the return signal by the converter STP sent from the second node in response to the signal. Receiving; Converting the global title number into the point code and subsystem number representing the first node and replacing the point code and subsystem number with the receiving address; And transmitting the return signal from the converter STP to the first node through the first SS7 network. The method of claim 1, wherein converting the global title number comprises converting the global title number into a global title number representing the translator STP. 6. The received point code and subsystem number as claimed in claim 5, wherein the signal has a plurality of parameters and the step of transmitting the signal is not used by the second SS7 network. Encapsulating the signal communication method between the first node and the second node characterized in that it further comprises. 7. The method of claim 6, wherein the return signal transferred through the second SS7 network uses the global title number as a receiving side address and the return signal also encapsulates the point code and subsystem number, from the second node. Receiving the return signal by the transducer STP sent; Withdrawing the encapsulated point code and subsystem number from the return signal by the translator STP; And transmitting the return signal toward the first node through the first SS7 network using the point code and the subsystem number derived from the converter STP as the receiving side address. Signal communication method between one node and a second node. In a system for communicating a signal including application layer data between a first node in a first signaling system No. 7 (SS7) network and a second node in a second SS7 network, the point code indicating the first node and Includes a subsystem number as an originating address, wherein the point code and subsystem number are formed in the first SS7 network and the point code and subsystem number are not formed in the second SS7 network, and include application layer data In a system for communicating a signal to A converter signal relay point (STP) connecting said first SS7 network to said second SS7 network; The converter STP, A signaling connection control part (SCCP) for receiving the signal from the first SS7 network; And a conversion module for interfacing with the SCCP layer module and converting the point code and subsystem number in the received signal into a global title number routable by the second SS7 network. A system for communicating a signal. 9. The system of claim 8, wherein said global title number represents said first node in said first SS7 network. 10. The system of claim 8, further comprising a memory table that stores possible point codes and subsystem numbers in the first SS7 network as corresponding global title numbers. 11. The apparatus of claim 10, wherein the SCCP module receives a return signal from the second node, and the return signal routed through the second SS7 network uses the global title number as a receiving side address; The conversion module converts the global title number into the point code and subsystem number previously received in the signal; The SCCP module transmits the return signal to the first node through the first SS7 network using the converted point code and the subsystem number as the receiving side address. System to communicate. 10. The system of claim 8, wherein said global title number represents said translator STP. 13. The apparatus of claim 12, wherein the signal has a plurality of parameters and the translator STP further comprises means for encapsulating the point code and subsystem number into one of the plurality of parameters not used by the second SS7 network. And a signal comprising application layer data. 14. The SCCP layer module of claim 13, wherein the SCCP layer module receives a return signal from the second node, wherein the return signal routed through the second SS7 network uses the global title number as a receiving side address and the point code. And also encapsulate the subsystem number; The conversion module retrieves the encapsulated point code and subsystem number from a return signal; And said SCCP layer module sends said return signal towards said first node using said retrieved point code and subsystem number as said receiving side number. In a system for communicating signals between a first node in a first signaling system No. 7 (SS7) network and a second node in a second SS7 network, the first node is identified by a point code and a subsystem number and is defined by the first node. SS7 network can route the signal using the point code and subsystem number and the second SS7 network can route the signal using the point code and subsystem number A system for communicating signals between A converter signal relay point connecting the first SS7 network to the second SS7 network; The converter STP, Means for receiving from said first node a signal comprising said point code and subsystem number indicative of said first node as a source address; Means for converting the point code and subsystem number into a global title number that can be routed through the second SS7 network and replacing the converted global title number of the signal with the calling party address; And means for transmitting the signal to the second node via the second SS7 network. 16. The system of claim 15, wherein said translator STP comprises an international gateway STP. 16. The system of claim 15, wherein the translated global title number represents the first node in the first SS7 network. The method of claim 17, wherein the converter STP, Means for receiving from the second node a return signal routed through the second SS7 network using the global title number as a receiving side address; Means for inversely converting the global title number into the point code and subsystem number previously received in the signal; Means for transmitting said return signal to said first node over said first SS7 network using said point code and subsystem number as said receiving side address. System for communicating signals. 16. The system of claim 15, wherein the translated global title number indicates the translator STP. 20. The method of claim 19, wherein the signal has a plurality of parameters and the translator STP encapsulates the received point code and subsystem number in one of the plurality of parameters not used by the second SS7 network. The system for communicating a signal between the first node and the second node further comprising. The method of claim 20, wherein the converter STP, A return signal conveyed through the second SS7 network uses the global title number as a receiving side address and the return signal also encapsulates the point code and subsystem number and receives the return signal from the second node. Means; Means for withdrawing the encapsulated point code and subsystem number from the return signal; And means for transmitting the return signal to the first node through the first SS7 network using the retrieved point code and subsystem number as the receiving side address. A system for communicating signals between nodes.