CN101192980A - Method and system for message loopback - Google Patents

Abstract

The invention discloses a method for message loopback, which includes the following steps: a. The signal network layer MTP3 of the MTP of the message transfer part of the main office or the third-level user adaptation layer M3UA of the MTP receives its MTP upper layer For the message sent, the destination signaling point of the message is the mutual aid office, and then the MTP3 or M3UA loops the message back to the upper layer of the MTP of the active office. The embodiment of the present invention overcomes the deficiencies of the prior art, realizes the loopback of the signaling point in MTP3 or M3UA, and solves the difference in loopback processing of messages to different destination signaling points via the same link, so that in N +1 In the case of belonging to the network, when the mutual aid site goes down, the business between the original active site and the mutual aid site can still run normally.

Description

Method and system for message loopback

technical field

The invention belongs to the technical field of NGN (next generation network), in particular to the technology of mobile softswitch network security.

Background technique

As an important technology in the next-generation network, softswitch hopes to integrate various networks as smoothly as possible in the next evolution process of different existing networks to maximize network resources and service resources. integration. Softswitch is the control function entity of the next generation network, which provides call control and connection control functions for the business of the next generation network with real-time requirements, and is the core of the call and control of the next generation network.

The mobile softswitch network has the characteristics of high density, large capacity, and centralized MSC SERER (softswitch center). MSC Server occupies a higher position in the network and often covers a larger area. When a major disaster occurs in MSC Server, such as man-made sabotage, equipment failure, natural disaster, etc., it will cause large-scale business interruption and have a huge impact. In order to ensure safe and reliable network operation, an N+1 home solution is provided in the prior art, and disaster recovery and backup functions between N sites and one site are realized through the N+1 home solution.

The N+1 home solution proposes the concept of a virtual server node, that is, each MSC Server is virtualized into N virtual server node units, corresponding to each MSCServer entity that forms an N+1 home network, and the data of each node is realized. and state are configured and managed completely independently.

As shown in Figure 1, SX2 (MSC server2) is the mutual assistance server of SX1 and SX3. In SX2, three virtual server node units, Server 0, Server 1 and Server 2, are virtualized. Under normal circumstances, the three servers each handle the business under their jurisdiction , when either SX1 or SX3 fails, its corresponding business will be activated on SX2, and the virtual Server 1 or Server 2 in SX2 will take over its subsequent business. After SX2 takes over the services of SX1 or SX3, the signaling message from SX2 to SX1 or SX3 needs to be landed and processed at SX2.

The existing MTP (Message Transfer Part) provides a signaling link loopback function, which can set a loopback flag for a certain MTP link. MTP determines the route according to the code of the destination signaling point, and then selects the link set and link according to the route. When the selected link has a loopback flag set, the message is looped back, and the message is directly processed by the MTP of the local office.

However, the existing signaling link loopback scheme will cause all messages sent via the link to be looped back to the local office for processing, and it is impossible to distinguish signaling messages via the same link but with different destination signaling points. As shown in Figure 2, if the link Link1 is set to loopback, the message from SP1 (Signalling Point) to SPA and the message from SP1 to SPB will be looped back, and the message from SP1 to SPA cannot be realized. The messages from SP1 to SPB are not looped back.

If SP1 is the mutual aid signaling point of SPA and SPB at the same time, and SP1 uses the same signaling link to SPA and SPB, if SPA fails, SP1 takes over the business of SPA, and the message of SPA is required to be looped back on the link. , and the signaling message to SPB does not need to be looped back, and the existing technical solutions cannot solve this problem. Therefore, as mentioned above, after SX2 takes over the SX3 business, the signaling message from SX2 to SX3 needs to be landed at SX2 Processing, the existing signaling link loopback solution cannot solve the problem that the message from SX2 to SX3 is looped back to SX2, while the message from SX2 to SX1 is not looped back. Therefore, in the existing N+1 home solution, after the active site takes over the services of the mutual aid site, the services from the active site to the mutual aid site cannot be processed normally.

Contents of the invention

The purpose of the present invention is to provide a message loopback method and system, aiming at solving the problem in the prior art that the service from the active site to the mutual aid site cannot be processed normally.

To achieve the above object, the technical scheme adopted in the present invention is as follows:

A method for message loopback, said method comprising the steps of:

a. The signal network layer MTP3 or MTP third-level service of MTP in the message transfer part of the main office is in MTP3 (Message Transfer Part message transfer part third layer) or M3UA (MTP3User Adaptation Layer message transfer part third-level user In the adaptation layer), the mutual assistance site will set the loopback flag. When the active site receives the message sent by its MTP upper-layer user, and its destination signaling point is the mutual assistance site, MTP3 or M3UA will directly loop the message back to the MTP The technical solution for upper-layer users realizes the loopback of signaling points in MTP3 or M3UA, and solves the difference in the loopback processing of messages to different destination signaling points via the same link, making it possible for N+1 home networking In some cases, when the mutual aid site goes down, the business between the original active site and the mutual aid site can still run normally.

Description of drawings

FIG. 1 is a schematic diagram of virtual servers in an N+1 home networking network in the prior art;

FIG. 2 is a schematic diagram of a message loopback described in an embodiment of the present invention;

Fig. 3 is a flowchart of an embodiment of the present invention.

Detailed ways

The basic principle of the embodiment of the present invention is that when the active office takes over the business of the mutual aid office, the mutual aid office will set the loopback flag in MTP3 or M3UA. When the active office receives the message sent by the MTP upper-layer user, its purpose When the signaling point is a mutual aid office point, the MTP or M3UA directly loops the message back to the MTP upper-layer user.

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In the case of N+1 home networking, when the active site takes over the services of the mutual aid site, the mutual aid virtual server configured on the active site will be activated. The signaling message is actually processed within the office.

The MTP of the telecommunication network protocol includes three layers: the first layer is the Signaling Data Link Level (Signalling Data Link Level), also known as the Physical Level (Physical Level), which defines the entity of the signal link, the electrical and user adaptation layer M3UA receives For the message sent by the upper layer of the MTP, the destination signaling point of the message is the mutual aid office point, then the MTP3 or M3UA loops the message back to the upper layer of the MTP of the active office point.

Wherein before step a also includes:

a0. The mutual aid site fails, and the active site takes over the services of the mutual aid site.

Wherein step a specifically includes:

a1. The upper layer of the MTP of the primary office sends a message to the MTP3 or M3UA, and the destination signaling point of the message is the mutual assistance office;

a2. After the MTP3 or M3UA receives the message, it detects whether the destination signaling point sets a loopback flag, and if so, loops the message back to the primary office point MTP upper layer.

Before step a1, it also includes:

a01. The mutual aid site fails, the active site takes over the services of the mutual aid site, and the MTP3 or M3UA sets the loopback flag on the mutual aid site.

The upper layer of the main office point is the signaling connection control part SCCP or the ISDN user part ISUP or the telephone user part TUP.

The present invention also provides a message loopback system, including a main office point and a mutual aid office point. The main office point includes MTP3 or M3UA, which is used to receive the message sent by the upper layer of the main office point MTP. and loop back the message whose destination signaling point is the mutual aid office point to the MTP upper layer of the active office point.

The MTP3 or M3UA is also used to set a loopback flag for the mutual aid office point, and is used to detect whether the destination signaling point of the message sent by the upper layer of the MTP of the active office point sets a loopback flag, if the If the destination signaling point of the message sets the loopback flag, the message is looped back to the upper layer of the MTP of the active site.

The upper layer of the primary MTP is SCCP, ISUP or TUP.

The embodiment of the present invention overcomes the deficiencies of the prior art, and adopts the functional characteristics of the mutual aid office when the active office takes over to provide a physical link for sending and receiving SS7 (Signaling No. 7) signals. The second layer is called the signal link Layer (Signalling Link Level), which is responsible for ensuring the reliability of SS7 signal information sent on the physical layer; the third layer (MTP3) is called Signaling Network Level (Signalling Network Level), the main function is signal information processing and signal network management .

M3UA (MTP3User Adaptation Layer message transfer part (level 3) user adaptation layer), used to realize the transmission of the No. 7 signaling protocol between the soft switch and the signaling gateway, and support the transmission of MTP third-level users on the IP network Messages, including SCCP (Signaling Connection Control Part), TUP (Telephone User Part) and ISUP (ISDN User Part ISDN User Part) messages.

As shown in Figure 2, when the active site activates the mutual-aid virtual server, the signaling point of the mutual-aid virtual server in MTP3 or M3UA is set with a loopback flag, so that when the MTP3 (M3UA) of the active site receives the SCCP, ISUP) and other messages sent over, when the destination signaling point is the signaling point of the mutual aid virtual Server, then there is no need to perform routing and other processing, and it is directly handed over to the upper layer of the MTP of the local office for processing.

Among them, 0x123 is the signaling point code of the primary office, and 0x456 is the signaling point code of the mutual aid virtual server. When the primary office receives a message from the upper layer SCCP of the local MTP, the destination signaling point code is 0x456 , indicating that the message is sent from the active site to the mutual-aid virtual server, because the active site has taken over the business of the mutual-aid virtual server at this time, and the message should be processed at the active site (local office), MTP3 or M3UA After receiving the message, it detects that the destination signaling point code is 0x456, and since the signaling point 0X456 has been set with a loopback flag at this time, the message sent to 0x456 is directly looped back to the SCCP of the local office for processing.

The process of this embodiment is shown in Figure 3, including the following steps:

1. SX2 (main office, signaling point code is 0x123) sends SCCP message to SX1 (mutual aid office point, signaling point code is 0x456), and SCCP sends the message to MTP3 (M3UA);

2. MTP3 (M3UA) detects whether the destination signaling point code 0x456 has a loopback flag set, if yes, go to step 3, otherwise go to step 4;

3. MTP3 (M3UA) loops the message back to SCCP for processing;

4. MTP3 (M3UA) determines the route according to the code of the destination signaling point, and then selects the link set and link according to the route, and sends the message to SX1.

As mentioned above, in the case of N+1 belonging network, when the mutual aid site fails, the active site takes over the business of the mutual aid site. At this time, MTP3 or M3UA sets the loopback Use the MTP upper layer (SCCP, ISUP or TUP) of the office to send a message to MTP3 or M3UA. After receiving the message, MTP3 or M3UA judges that the destination signaling point is a mutual aid office, and the mutual aid office sets the loopback flag, then The message is directly looped back to the MTP upper layer of the active site. Therefore, after the active site takes over the services of the mutual aid site, the services from the active site to the mutual aid site can be processed normally.

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

Claims (8)

1. A method for message loopback, characterized in that said method comprises the steps of: a. The signal network layer MTP3 of the MTP of the message transfer part of the active site or the third-level user adaptation layer M3UA of the MTP receives the message sent by the upper layer of the MTP, and the destination signaling point of the message is the mutual aid site, then the The above MTP3 or M3UA loops the message back to the upper layer of the primary MTP. 2. The method according to claim 1, characterized in that, before step a, further comprising: a0. The mutual aid site fails, and the active site takes over the services of the mutual aid site. 3. The method according to claim 1, wherein step a specifically comprises: a1. The upper layer of the MTP of the primary office sends a message to the MTP3 or M3UA, and the destination signaling point of the message is the mutual assistance office; a2. After the MTP3 or M3UA receives the message, it detects whether the destination signaling point sets a loopback flag, and if so, loops the message back to the primary office point MTP upper layer. 4. The method according to claim 2, characterized in that, before step a1, further comprising: a01. The mutual aid site fails, the active site takes over the services of the mutual aid site, and the MTP3 or M3UA sets the loopback flag on the mutual aid site. 5. The method according to claim 1, characterized in that, the upper layer of the main office point is a signaling connection control part (SCCP) or an ISDN user part (ISUP) or a telephone user part (TUP). 6. A system for message loopback, including a main office point and a mutual aid office point, characterized in that the main office point includes MTP3 or M3UA, which is used to receive the MTP upper layer of the main office point from its The message sent and looped back to the MTP upper layer of the active office point with the message that the destination signaling point is the mutual aid office point. 7. The system according to claim 6, characterized in that, the MTP3 or M3UA is also used to set a loopback flag for the mutual aid office, and is used to detect the MTP upper layer sent by the active office Whether the destination signaling point of the message is set with a loopback flag, if the destination signaling point of the message is set with a loopback flag, the message is looped back to the upper layer of the MTP of the active site. 8. The system according to claim 6, characterized in that, the upper layer of the primary MTP is SCCP or ISUP or TUP.

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