CN100456750C - A Message Processing Method of Heterogeneous SS7 Signaling Network - Google Patents

Abstract

A method for processing heterogeneous No. 7 signaling network messages. The network device is pre-set to include conversion rule information between effective network indications, and the network device that directly communicates with the heterogeneous network receives a message from the heterogeneous network. Or when preparing to send a message to a heterogeneous network, perform the following operations: A. The network device converts the network indication value in the message into a valid network indication value that can be processed by itself according to the conversion rule information applicable to the message, Or convert it into an effective network indication value that can be processed by the heterogeneous network; B. The network device decodes the converted message and sends it to its own upper-layer user, or sends it to the destination signaling point after reorganization. Using the solution of the present invention, the network equipment directly communicating with the heterogeneous network performs NI conversion processing on the message, which can reduce occupied network resources, reduce the complexity of networking, and also save the cost of network communication.

Description

A Message Processing Method of Heterogeneous SS7 Signaling Network

technical field

The invention relates to the message transmission technology of the No. 7 signaling network, in particular to a processing method for messages of the heterogeneous No. 7 signaling network.

Background technique

In a communication system, according to the relationship between transmission channels and voice channels, signaling can be divided into channel-associated signaling and common channel signaling. Among them, channel-associated signaling uses the channel for transmitting voice information to transmit various signaling related to the voice channel; while common channel signaling separates the channel for transmitting signaling from the channel for transmitting voice, that is, connects each telephone All kinds of signaling in the channel are transmitted on a bidirectional signaling link. Currently commonly used public channel signaling systems include Signaling System No. 6 (SS6) and Signaling System No. 7 (SS7), wherein SS6 is applied to an analog network and SS7 is applied to a digital network. SS7 has the characteristics of fast transmission speed, large signal capacity, and high reliability. The signaling link has the capabilities of handshake, inspection, error control, congestion control, and redundant backup. It is a kind of signaling information that has nothing to do with circuit connection, and is applicable to wired communication network and wireless communication network.

The SS7 signaling network is a data network used to transmit communication messages, and it consists of many various signaling points (SP) and links connecting the signaling points. The so-called signaling point refers to the node of the signaling network attached to the network equipment, such as: a switch in a wired communication system, a home location register (HLR) and a short message center (SMC) in a wireless communication system. From the perspective of message sending and receiving, the signaling point that sends a message is the source signaling point of the message, and the signaling point that receives the message is the destination signaling point of the message. From a functional point of view, signaling points include non-signaling transfer points and signaling transfer points (STP). Among them, the non-signaling transfer point is the generation or termination point of signaling messages, responsible for initiating calls or receiving incoming calls, and converting voice switching system signals into SS7 messages; and STP is used to complete the function of message forwarding. The message sent by the transfer point, and then exchange the message from other signaling points to the destination signaling point through the network. The physical link connecting each signaling point is called a signaling link. The signaling link can be a transparent digital path or a high-quality analog path; the signaling link connecting two signaling points The collection of paths is called signaling link set; and the path that signaling message takes from source signaling point to destination signaling point is called signaling route.

SS7 is structurally divided into message transfer part (MTP) and user part (UP). Among them, MTP is responsible for the correct transmission of signaling messages between various signaling points; and UP is responsible for processing signaling messages. MTP consists of the following three levels:

1. Signaling data link level: also known as MTP1, this level specifies the physical and electrical characteristics and access methods of the signaling link, and provides a full-duplex bidirectional transmission channel, consisting of a pair of transmission channels with the same transmission rate and opposite transmission directions Composed of data channels to complete the transparent transmission of binary bit streams.

2. Signaling link level: also called MTP2, this level divides the transparently transmitted bit stream in MTP1 into signaling units of different lengths, and ensures correct transmission of signaling units through error detection and retransmission correction.

3. Signaling network function level: also called MTP3, including two parts: signaling message processing and signaling network management. The function of signaling message processing is to send the signaling unit to the corresponding user part designated by the user according to the address message in the message signaling unit; the function of signaling network management is to work on each signaling route and signaling link When the signaling link and signaling route fail, the signaling network management will control the message routing and the structure of the signaling network on the basis of the known signaling network status data and information, and complete the signaling The reassembly of the network restores normal messaging capabilities.

The protocol ITU-T Q.704 related to MTP stipulates that the network indication (NI) carried in the SS7 message is used to identify the network structure where the source signaling point of the message is located. There are four valid types of NI: 0, 1, 2, and 3. value of . In addition, each signaling point uses a signaling point code to identify its network address, and the signaling point code generally includes two structures of 14 bits and 24 bits.

For a network using 24-bit signaling point codes, the message format is: main signaling area code (8 bits) + sub-signaling area code (8 bits) + specific signaling point code (8 bits), where the main signaling area The code of the signaling area represents the province or city where the signaling point is located, and the sub-signaling area code represents the level of the switching office where the signaling point is located. The specific signaling point code includes information such as the source signaling point and the target signaling point of the message; For a network using 14-bit signaling point codes, the message format is: main signaling area code (3 bits) + sub-signaling area code (8 bits) + specific signaling point code (3 bits), the meaning of each part is the same as The corresponding part in the 24-bit signaling point code is the same.

Since the NI and signaling point codes are selected by each country or operator according to the specific situation, the signaling point structure of the network with the same NI can be the same or different; the signaling point structure of the network with different NI will also be different. same or different situations. In the SS7 signaling network, a network with the same NI but different signaling points is called a heterogeneous network.

According to the agreement, in the network with the same NI, only the signaling points with the same coding structure of signaling points can communicate directly. For example, when the NIs adopted by the networks of two different operators are both 2, and the signaling point codes are 14-bit signaling points and 24-bit signaling points respectively, since the NIs are the same but the signaling point coding structures are different, they are respectively located in The signaling points in the above two networks cannot directly communicate with each other.

Assume that network devices A and B are in networks with NI=2 and NI=3 respectively, and network device C is in both networks with NI=2 and NI=3. According to the signaling point structure of network devices A and B, the network maintenance personnel pre-set the signaling point encoding methods corresponding to different NIs in network device C, that is, assuming that network device A is 14-bit signaling point code, network device B The above is a 24-bit signaling point code, then setting NI=2 in network device C corresponds to setting 14-bit signaling point code in network device A, and setting NI=3 corresponds to setting 24-bit signaling point code in network device B. Since network device C is consistent with network device A and network device B at the same time, network device C can directly communicate with network device A and network device B respectively. In addition, due to the existence of the network device C, the network device A and the network device B can transmit messages to each other, thereby realizing intercommunication between the network with NI=2 and the network with NI=3.

Specifically, the message between network device C and network device A adopts NI=2, 14-bit signaling point structure, and the message between network device C and network device A adopts NI=3, 24-bit signaling point structure; However, when the network device A and the network device B exchange messages, the network device C forwards the messages for the network device A and the network device B.

Taking network device A sending a signaling connection control part (SCCP) message to network device B as an example, the specific process is as follows:

When network device C receives the SCCP message from network device A, it first obtains the NI value carried in the message, and decodes it according to the preset signaling point coding structure corresponding to the NI value; then, network device C obtains the NI value from Obtain the global code (GT) in the message, and after GT translation, determine that the destination signaling point of the message is the signaling point on the network device B; network device C according to the NI value of network device B and the preset The signaling point code on network device C corresponding to the NI value reconstructs the SCCP message and sends it to network device B.

Similarly, when network device B sends a message to network device A, network device C first decodes the message according to the 24-bit signaling point code corresponding to NI=3, and then reassembles the message into a 14-bit signal that device A can recognize. The message encoded by the signaling point is sent to network device A.

The above is the normal communication process of the network with different NI and different signaling point structure, but when the NI is the same but the signaling point structure is different, it cannot be processed according to the normal processing flow. In order to enable network devices in heterogeneous networks with the same NI but different signaling point coding structures to communicate with each other, the current practice is to use gateways to process messages transmitted between heterogeneous network devices and convert them into destination network devices The message format that can be recognized by the network where it is located, and then the converted message is sent out. As shown in Figure 1, network device A is in a network with NI=2 and has a 24-bit signaling point code, while network device C is also in a network with NI=2, but has a 14-bit signaling point code, so the network Device A and network device C are in a heterogeneous network. In order to enable intercommunication between network device A and network device C, a gateway is added between A and C as a message transfer. At present, there are many types of gateways, and their implementation methods are different. Here, only one gateway is used as an example for illustration. As shown in Figure 2, the gateway that completes the intercommunication between network device A and network device C in a heterogeneous network includes at least a processing unit that communicates with network device A and a processing unit that communicates with network device C. The message of A and network device C is converted into a format that the destination signaling point can recognize and sent out. As shown in Figure 3, when a message is sent from network device A to network device C, the method for the gateway to process heterogeneous network messages includes the following steps:

Step 301. The processing unit in the gateway that communicates with network device A receives the message sent by network device A to network device C.

When network device A communicates with network device C, because network device A is in a network with NI=2 and a signaling point code structure of 24 bits, and network device C is in a network with NI=2 and a signaling point code structure of 14 bits In the network, that is, the two are network devices in a heterogeneous network and cannot communicate directly. Therefore, the message sent by network device A to network device C is actually sent to the gateway between network device A and network device C, and the processing unit communicating with network device A in the gateway receives the message.

Steps 302-303. The processing unit in the gateway that communicates with network device A performs data analysis and decoding processing on the received message; then, sends the processed message to the processing unit in the gateway that communicates with network device C.

Here, the processing unit that communicates with network device A first performs data analysis and decoding processing on the message from network device A, distinguishes the specific meaning of each part in the 24-bit signaling point code, and converts it into a byte representation Then, the processing unit communicating with network device A sends the message expressed in bytes to the processing unit communicating with network device C in the gateway where it is located.

Step 304. The processing unit in the gateway that communicates with the network device C converts the processed message into a format that the network device C can recognize, and then sends it to the network device C.

Here, the processing unit communicating with network device C first converts the content of the message expressed in bytes into a 14-bit signaling point code so that network device C can recognize it; then, converts it into a 14-bit signaling point code The encoded message is sent to network device C.

Step 306. Network device C sends the message to its own upper layer user or other network devices.

After receiving the 14-bit signaling point coded message from the gateway, network device C sends it to the upper layer user of network device C or the signaling point on other network devices according to the specific content of the message.

The disadvantages of the existing heterogeneous SS7 message processing method are:

The use of gateway equipment to convert messages transmitted between heterogeneous SS7 signaling networks increases the complexity of networking; and because the gateway equipment needs to occupy an independent signaling point code, it takes up more network resources .

Contents of the invention

In view of this, the purpose of the present invention is to provide a method for processing heterogeneous SS7 messages, which reduces occupied network resources and reduces the complexity of networking.

In order to achieve the above object, the present invention provides a method for processing heterogeneous No. 7 signaling network messages. The network equipment is pre-set to include valid network indications that can be processed by the network equipment itself and effective network indications that can be processed by heterogeneous networks. When a network device directly communicating with a heterogeneous network receives a message from a heterogeneous network, or prepares to send a message to a heterogeneous network, it performs the following operations:

A. According to the conversion rule information applicable to the message, the network device converts the network indication value in the message into an effective network indication value that can be processed by itself, or into an effective network indication value that can be processed by the heterogeneous network ;

B. The network device decodes the converted message and sends it to its own upper-layer user, or reassembles it and sends it to the destination signaling point.

Set the effective network indication that can be processed by the network device itself as the source network indication, and set the effective network indication that can be processed by the heterogeneous network as the destination network indication, then in step A, convert the network indication value in the message The method of converting the network device into an effective network indicator value that can be processed by itself, or converting it into an effective network indicator value that can be processed by a heterogeneous network is as follows:

If the network device receives the message, convert the network indication of the message from the destination network indication in the conversion mapping table to the source network indication according to the conversion rule information;

If the network device is going to send a message, convert the network indication of the message from the source network indication in the conversion mapping table to the destination network indication according to the conversion rule information.

The network device performs the following operations before performing the step A:

A 1. Check the conversion mapping table to obtain the first conversion rule;

A2. Determine whether the conversion rule is applicable to the message; if applicable, perform step A according to the conversion rule, otherwise, perform step A3;

A3. Determine whether the conversion rule is the last record in the conversion mapping table; if yes, end the conversion processing flow, otherwise, turn to the next conversion rule in the conversion mapping table, and then return to step A2.

The conversion rule further includes: a conversion switch, a constraint type indicating a message transmission mode, and a constraint indicating specific information of message transmission.

The method for the network device to determine whether the conversion rule is applicable to the message is to determine whether the conversion switch is turned on, and if it is turned on, then judge whether the constraint type and the constraint match the message, and if so, the conversion The rule is applicable to the message, otherwise, the conversion rule is not applicable to the message; if the conversion switch is off, the conversion rule is not applicable to the message.

The constraint type at least includes: link set conversion, link conversion or route conversion.

If the constraint type is link set conversion, the constraint is: a constraint indicating the link set where the message should be converted;

If the constraint type is link conversion, the constraint is: a constraint indicating the link where the message should be converted;

If the constraint type is route conversion, the constraint is: a constraint indicating the route where the message should be converted.

By applying the present invention, the network device directly communicating with the heterogeneous network converts the NI value in the message to be sent or received into other effective values, realizing the communication between the same device and the heterogeneous network. Specifically, the present invention has the following beneficial effects:

1. In the present invention, the network equipment that directly communicates with the heterogeneous network converts the messages interacting with the heterogeneous network to NI processing, without the need for the gateway to transfer the signaling messages, which reduces the occupied network resources and reduces the number of groups. The complexity of the network, while saving the cost of network communication;

2. The present invention saves the processing of the signaling message by the gateway, reduces the processing time, and shortens the interaction time between signaling points;

3. The present invention does not require the participation of gateways when transmitting messages between heterogeneous SS7 signaling networks, reduces the number of signaling points in the network, and facilitates network management and maintenance.

Description of drawings

FIG. 1 is a structural diagram of an existing heterogeneous SS7 signaling network.

FIG. 2 is a schematic diagram of an existing gateway structure.

Fig. 3 is a flow chart of an existing heterogeneous No. 7 signaling network message processing method.

Fig. 4 is a structural diagram of a heterogeneous SS7 signaling network according to the present invention.

FIG. 5 is a flow chart of a message processing method for a heterogeneous SS7 signaling network adopted when a network device C prepares to send a message in an embodiment of the present invention.

FIG. 6 is a flow chart of the network device C performing NI conversion processing on messages in the embodiment of the present invention.

FIG. 7 is a flow chart of a message processing method for a heterogeneous No. 7 signaling network when network device C receives a message in an embodiment of the present invention.

Fig. 8 is a schematic diagram of a network using the message processing method of the heterogeneous SS7 signaling network of the present invention.

Detailed ways

In order to make the purpose and technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

The present invention is a processing method for heterogeneous No. 7 signaling network messages, and its basic idea is: a network device that needs direct communication in a heterogeneous network that is the same as NI but has a different signaling point structure receives a message from the heterogeneous network , or when preparing to send a message to a heterogeneous network, the network device converts the NI in the message into an effective NI that can be processed by itself, or into an effective NI that can be processed by the heterogeneous network, and then decode or encode the message Recombination processing.

This embodiment adopts the heterogeneous No. 7 signaling network shown in FIG. 4 , assuming that network device A is in a network with NI=2 and a signaling point encoding structure of 24 bits, and because network device C converts the NI value of the message to Realize the intercommunication with the network with NI=2, 24-bit signaling point code, and the network with NI=2, 14-bit signaling point code, that is, both networks think that signaling point C is in their own network , then network device C is in both networks at the same time. In this embodiment, the protocol types used by network device A and network device C are the same, that is, both use the International Telecommunication Union (ITU) protocol or a national standard protocol, such as China's No. 7 national standard specification, the American National Standards Institute (ANSI) agreement etc.

As shown in FIG. 5, when the network device C prepares to send a message to other network devices in the heterogeneous network, the method for processing the message of the heterogeneous No. 7 signaling network in this embodiment includes the following steps:

Step 501. Network device C prepares to send a message.

In this step, the network device C prepares to send a message, and the destination signaling point of the message is in a network with NI=2 and a 14-bit signaling point code, or in a network with NI=2 and a 24-bit signaling point code.

Step 502. Network device C performs NI conversion processing on the message.

In order to communicate with signaling points in the two networks, network device C needs to map one of the above networks to a local effective network, for example: map the network with NI=2, 14-bit signaling point code as NI= 3. A network with a 14-bit signaling point code; in this way, when the network device C communicates with a network with NI=2 and a 14-bit signaling point code, it is considered to be communicating with a network with NI=3 and a 14-bit signaling point code. In order to convert the NI value, this embodiment sets a conversion mapping table including conversion rules in the MTP3/M3UA (MTP3 User Adaptation Layer) of the network device C in advance. The content of each conversion rule in the conversion mapping table is as follows:

1. Conversion switch: It is a switch value set by the developer according to the actual application in order to reduce the modification of the conversion mapping table and improve the flexibility of the conversion mapping table. Its function is to indicate whether the conversion rule works. When the conversion switch is "TRUE", the conversion switch is turned on, and this conversion rule takes effect; when the conversion switch is "False (FALSE)", the conversion switch is closed, and this conversion rule does not work.

2. constraint type and constraint: the present invention has defined three kinds of constraint types altogether: link conversion, link set conversion and route conversion, wherein link conversion represents that the NI value of the signaling message on the prescribed signaling link is all converted, Link set conversion means converting the NI value of signaling messages on all links in the specified signaling link set, and routing conversion means converting the NI value of all signaling messages that have passed through the specified signaling route; the above signaling The specific information of link, signaling link set and signaling route is stipulated in the constraint part of the conversion mapping table.

3. Source NI: Indicates the NI value that can be recognized by the network device that performs NI conversion on the signaling message to which the conversion rule applies.

4. Destination NI: Indicates the NI value that can be recognized by the network equipment of the signaling message to which this rule applies.

For example, the conversion mapping table shown in Table 1 includes three conversion rules, and each conversion rule includes conversion switch, constraint type, constraint, source NI, and destination NI.

Conversion rules transfer switch Constraint type constraint Source NI Purpose NI 1 FALSE link switch Link 1 of link set 1 3 2 2 TRUE Linkset conversion Link Set No. 1 3 2 3 TRUE Routing conversion Route 3 3 2

Table 1

In this step, the message matches the constraint type and constraint in conversion rule 2, so network device C converts the NI value in the message according to the conversion rule table, and converts the NI value in the message from 2 to 3, so that The destination network device can recognize the message.

Step 503. Network device C reassembles the converted message and sends it to the destination signaling point.

In this step, network device C reassembles the message into a signaling point code structure that its destination network device can recognize according to the converted NI value, and then sends the message to its destination network device. The method for the network device C to recombine the signaling point code of the message is exactly the same as the existing method.

Wherein, in step 502, the process of network device C performing NI conversion processing on the message is shown in Figure 6, and the process includes the following steps:

Step 601. Network device C checks the conversion mapping table to obtain the first conversion rule.

In this step, the network device C reads the conversion mapping table, and obtains the first conversion rule in the conversion mapping table. Taking the conversion mapping table shown in Table 1 as an example, network device C obtains in this step that the conversion switch is FALSE, the constraint type is link conversion, the constraint is link 1 of link set 1, the source NI is 2, A conversion rule whose destination NI is 3.

Step 602. The network device C judges whether the switch in the conversion rule is turned on, and if yes, executes step 603; otherwise, executes step 605.

In this step, the network device C reads the state of the conversion switch in the conversion rule. If the value of the conversion switch is TRUE, it means that the conversion switch has been turned on, and the signaling point C can continue to read other parts of the conversion rule; if The value of the conversion switch is FALSE, which means that the conversion switch is turned off, and the conversion rule does not work, so the network device C does not need to read the content of other parts of the conversion rule. For the first conversion rule in Table 1, since the conversion switch is in the off state, the network device C turns to step 605 .

When the network maintainer thinks that a certain conversion rule does not need to work any more, he directly sets the switch of the rule to FALSE, so that subsequent operations are no longer performed according to the rule.

Step 603 . The network device C judges whether the constraint type and the constraint in the conversion rule match the message, and if yes, execute step 604 ; otherwise, execute step 605 .

In this step, the network device C first reads the constraint type and the specific content of the constraint part in the conversion rule, and then judges whether the above two parts match the current message. For example: the constraint type of conversion rule 2 in Table 1 is link set conversion, and the corresponding constraint is link set No. 1, and if the current message comes from link set No. 2, because the current message and constraint part indicate The link sets for are not the same, so the constraint type and constraints in the translation rule are considered to not match the message.

Step 604. The network device C converts the message according to the source NI and destination NI in the conversion rule, and then ends the NI processing flow.

In this step, if the conversion switch in the conversion rule is turned on, and the constraint type and constraint match the signaling message, the network device C converts the NI value of the message from the source NI to the destination NI.

Steps 605-606. The network device C judges whether the conversion rule is the last record in the conversion mapping table, and if so, ends the NI conversion processing flow; otherwise, turns to the next conversion rule in the conversion mapping table, and then returns to execute step 602 .

When the conversion switch in the conversion rule is turned off or the constraint type and the constraint do not match the message, network device C first judges whether this conversion rule is the last record in the conversion mapping table, that is, judges whether the conversion mapping table still contains There are other transformation rules that have not been queried. If this conversion rule is the last record in the conversion mapping table, it indicates that none of the conversion rules in the conversion mapping table is applicable to the message, that is, the destination signaling point of the message can identify the signaling point code, so NI does not need to convert, Then end the M conversion processing flow; if this conversion rule step converts the tail record in the mapping table, then the signaling point C turns to the next conversion rule, and returns to the execution step 602 to re-judge whether there is a conversion rule applicable to the message.

Take the conversion mapping table shown in Table 1 as an example, at this time, network device C judges whether the current conversion rule is the third conversion rule, and if so, ends the NI processing flow; otherwise, turns to the next conversion rule in Table 1 .

Through the above steps 601 to 606, the network device C has completed the NI conversion processing of the message in step 501. This processing has two results: one result is that there is a conversion rule applicable to the message in the conversion mapping table, and the network Device C converts the NI value of the message according to the content of the conversion mapping table; another result is that there is no conversion rule applicable to the message in the conversion mapping table, that is, the NI value does not need to be converted, and network device C still retains The NI value in this message is unchanged.

The above is the specific process of using the message processing method of the heterogeneous No. 7 signaling network when the signaling point C prepares to send a message. As shown in FIG. 7, when the network device C receives a message, the method for processing the heterogeneous No. 7 signaling network message in this embodiment includes the following steps:

Step 701. Network device C receives a message.

In this step, the network device C receives a message from a signaling point in a NI=2, 14-bit signaling point coding network, or from a signaling point in a NI=2, 24-bit signaling point coding network signaling point.

Step 702. Network device C performs NI inverse conversion processing on the message.

In order to perform inverse conversion processing of the NI value, this embodiment presets a conversion mapping table including conversion rules in the MTP3/M3UA (MTP3 User Adaptation Layer) of the signaling point C. The content of the conversion mapping table is exactly the same as the conversion mapping table in step 602 .

In this step, the process of network device C performing NI conversion processing on the message is basically the same as step 601 to step 606 shown in Figure 6, except that in this step, the NI value of the message is converted from the destination NI in the conversion rule to the source NI .

Step 703. Network device C decodes the inversely converted message and sends it to its upper-layer user.

In this step, the network device C decodes the message according to the corresponding signaling point code according to the converted NI value, and then sends the message to the upper layer user of the network device C. The method in which the network device C decodes the message according to the converted NI value is exactly the same as the existing method.

In order to make the method of the present invention more intuitive, an example is given below. As shown in Figure 8, network equipment C is in the network of NI=2, 24 signaling point codes and the network of NI=2, 14 signaling point codes, and it and NI=2, signaling point codes are 14 respectively Signaling point 1, signaling point 2 and signaling point 3 of bit, 24 bit, and 14 bit communicate directly. Between network device C and signaling point 1 is link set No. 1 and route No. 1, where link set No. 1 includes link No. 1 and link No. 2; between network device C and signaling point 2 is link set 2 No. link set and No. 2 route, of which No. 2 link set contains only one link; No. 3 link set and No. 3 route are between network device C and signaling point 3, of which No. Contains 1 link. Assume that the conversion mapping table in network device C has the contents in Table 1.

When network device C receives a message from signaling point 1 from link No. 1 in link set No. 1, the NI of the message is 2, and the signaling point code is 14 bits, then network device C first checks the conversion Mapping table, get conversion rule 1. Since the conversion switch in conversion rule 1 is off, the conversion rule does not work, and network device C turns to conversion rule 2. The conversion switch in the conversion rule 2 is in the open state, and the network device C checks the constraint type and the constraint part again. Since the constraint type in conversion rule 2 is link set conversion and the constraint is link set 1, and the message comes from link set 1, the message matches the constraint type and constraint in conversion rule 2, so the network Device C converts the NI in the message from 2 to 3. Since the network device C has already found the conversion rule applicable to the message in the conversion mapping table, and has performed the conversion of NI, there is no need to check other conversion rules, so the network device C decodes the message with the converted NI value and sends it to itself upper-level users.

When the network device C receives a message from the signaling point 2 from the No. 1 link in the No. 2 link set, the message has NI=2 and the signaling point code is 24 bits. When using the method of the present invention, the network device C first checks the conversion mapping table to obtain the conversion rule 1. Since the conversion switch in conversion rule 1 is off, the conversion rule does not work, and network device C turns to conversion rule 2. The conversion switch in the conversion rule 2 is in the open state, and the network device C checks the constraint type and the constraint part again. Since the constraint type in conversion rule 2 is link set conversion and the constraint is link set No. 1, and the message comes from link set No. 2, the message does not match the constraint type and constraint in conversion rule 2. So network device C turns to conversion rule 3. The conversion switch in conversion rule 3 is open, the constraint type is route conversion, and the constraint is route No. 3. Since the message comes from route No. 2, conversion rule 3 is also not applicable to this message. Network device C checks that conversion rule 3 is the last record in the conversion mapping table, so it does not convert the NI value of the message. It can be seen here that there is no conversion rule applicable to this message in the conversion mapping table, that is, network device C and signaling point 2 can communicate directly, so network device C retains its original NI value.

When the network device C receives a message from the signaling point 3 from the No. 1 link in the No. 3 link set, the message has NI=2 and the signaling point code is 14 bits. When using the method of the present invention, the network device C first checks the conversion mapping table to obtain the conversion rule 1. Since the conversion switch in conversion rule 1 is off, the conversion rule does not work, and network device C turns to conversion rule 2. The conversion switch in the conversion rule 2 is in the open state, and the network device C checks the constraint type and the constraint part again. Since the constraint type in conversion rule 2 is link set conversion and the constraint is link set No. 1, and the message comes from link set No. 3, the message does not match the constraint type and constraint in conversion rule 2, So network device C turns to conversion rule 3. The conversion switch in conversion rule 3 is open, the constraint type is route conversion, and the constraint is route No. 3. Since the message comes from route No. 3, conversion rule 3 is applicable to this message, so network device C converts the NI value of the message to 2 is converted to 3, and then network device C decodes the message with the converted NI value and sends it to its own upper-layer user. Therefore, after the network device C uses the method of this embodiment to convert the NI value in the message into other NI values allowed by the protocol, and then decodes according to the different message processing methods of NI stipulated in the protocol, the upper-layer users will be identified according to the converted NI This message realizes intercommunication between heterogeneous networks with the same NI value and different signaling point coding structures.

When network device C sends a message to network devices 1, 2, and 3, it also needs to check the conversion mapping table. Before sending the message to the link, convert the NI in the message to the network device 1, 2, and 3 that can be processed. The NI.

This embodiment describes the processing method of the heterogeneous No. 7 signaling network message by the signaling point network device C; similarly, A can also use the method of this embodiment to realize the intercommunication of the heterogeneous No. 7 signaling network , the specific process is the same as the process used in C above.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (7)

1. A processing method for heterogeneous No. 7 signaling network messages, characterized in that the network device is pre-configured to contain the effective network indication that the network equipment itself can handle and the effective network indication that the heterogeneous network can handle. To convert rule information, when a network device that directly communicates with a heterogeneous network receives a message from a heterogeneous network, or prepares to send a message to a heterogeneous network, it performs the following operations: A. According to the conversion rule information applicable to the message, the network device converts the network indication value in the message into an effective network indication value that can be processed by itself, or into an effective network indication value that can be processed by the heterogeneous network ; B. The network device decodes the converted message and sends it to its own upper-layer user, or reassembles it and sends it to the destination signaling point. 2. The method according to claim 1, wherein the effective network indication that the network device itself can handle is set as the source network indication, and the effective network indication that the heterogeneous network can handle is set as the destination network indication , then the method of converting the network indicator value in the message into an effective network indicator value that can be processed by the network device itself, or into an effective network indicator value that can be processed by a heterogeneous network as described in step A is: If the network device receives the message, convert the network indication of the message from the destination network indication in the conversion mapping table to the source network indication according to the conversion rule information; If the network device is going to send a message, convert the network indication of the message from the source network indication in the conversion mapping table to the destination network indication according to the conversion rule information. 3. The method according to claim 2, wherein the network device performs the following operations before performing the step A: A1. Check the conversion mapping table to obtain the first conversion rule; A2. Determine whether the conversion rule is applicable to the message; if applicable, perform step A according to the conversion rule, otherwise, perform step A3; A3. Determine whether the conversion rule is the last record in the conversion mapping table; if yes, end the conversion processing flow, otherwise, turn to the next conversion rule in the conversion mapping table, and then return to step A2. 4. The method according to claim 3, wherein the conversion rule further comprises: a conversion switch, a constraint type indicating a message transmission mode, and a constraint indicating specific information of message transmission. 5. The method according to claim 4, wherein the method for the network device to determine whether the conversion rule is applicable to the message is: determine whether the conversion switch is turned on, and if it is turned on, then determine the constraint type Whether the sum constraint matches the message, if yes, the conversion rule is applicable to the message, otherwise, the conversion rule is not applicable to the message; if the conversion switch is off, the conversion rule is not applicable to the message . 6. The method according to claim 5, wherein the constraint type at least includes: link set conversion, link conversion or route conversion. 7. The method of claim 6, wherein: If the constraint type is link set conversion, the constraint is: a constraint indicating the link set where the message should be converted; If the constraint type is link conversion, the constraint is: a constraint indicating the link where the message should be converted; If the constraint type is route conversion, the constraint is: a constraint indicating the route where the message should be converted.

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