CN102164055A - Detection processing method and device for signaling connection control part (SCCP) loop - Google Patents

Abstract

A method for detecting and processing an SCCP loop, comprising: a first network element performs GT routing processing on a connectionless service message sent by a second network element; according to the routing result, it is judged whether the called address in the connectionless service message has been modified , and whether the next-hop network element of the route is the second network element; if the called address has not been modified and the next-hop network element of the route is the second network element, then determine whether the first network element and the second network element An SCCP loop is created between them. Since it is judged whether there is an SCCP loop between two network elements through the routing result, the efficiency is higher and the scope of application is wider. In addition, the operation of realizing the SCCP loop detection based on the hop counter is performed in advance before the service processing, so as to avoid the impact of the SCCP loop detection delay on the service.

Description

A method and device for detecting and processing an SCCP loop

technical field

Embodiments of the present invention relate to the technical field of network communication, and in particular to a SCCP (Signaling Connection Control Part, signaling connection control part) loop detection and processing method and device.

Background technique

As an important member of No.7 (Signaling System No.7, No. 7 signaling system), the SCCP protocol is widely used in communication networks. If there is a conflict in the data planning between different network elements in the communication network, it will cause a loop at the SCCP layer of the message (that is, an SCCP loop), causing the message to oscillate among multiple network elements, occupying a large amount of network bandwidth and CPU ( Central Processing Unit, central processing unit) resources.

For the XUDT (Extended unitdata, enhanced unit data) message and LUDT (Long unitdata, long unit data) message in the connectionless service message, the SCCP protocol stipulates the "hop counter" parameter, and proposes to implement SCCP based on the "hop counter" parameter. The method of loop detection, the working principle of this method is as follows: the initial value of the hop counter is 15, during the data service transmission process, each time the GT (Global Title) translation is performed for the XUDT message or LUDT message, the hop counter value is decremented by one, when When the hop counter value is 0, it indicates that an SCCP loop occurs between the network elements that transmit the message. At this point, the message is discarded and a warning message is issued.

In the process of realizing the present invention, the inventor found that at least the following problems existed in the prior art:

The existing SCCP loop detection method is only applicable to XUDT messages or LUDT messages, and cannot detect SCCP loops for other connectionless service messages.

Contents of the invention

Embodiments of the present invention provide a method and device for SCCP loop detection, thereby solving the problem that the existing SCCP loop detection is only applicable to XUDT messages or LUDT messages.

The purpose of the present invention is achieved through the following technical solutions:

A method for detecting and processing an SCCP loop in a signaling connection control part, comprising:

The first network element performs global code GT routing processing on the connectionless service message sent by the second network element;

The first network element determines whether the called address in the connectionless service message is modified according to the routing result, and whether the next-hop network element of the route is the second network element;

If the called address is not modified and the next-hop network element of the route is the second network element, it is determined that an SCCP loop is generated between the first network element and the second network element.

A device for detecting and processing an SCCP loop of a signaling connection control part, comprising:

A routing processing module, configured to perform global code GT routing processing on the connectionless service message sent by the second network element;

A loop detection module, configured to determine whether the called address in the connectionless service message has been modified and whether the next-hop network element of the route is the second network element according to the routing result of the routing processing module; If the called address is not modified and the next-hop network element of the route is the second network element, it is determined that an SCCP loop is generated between the local network element and the second network element.

Due to the existing method for implementing SCCP loop detection based on the hop counter, the SCCP loop can only be detected after 15 GT translations, and it is only applicable to the SCCP loop detection of XUDT messages or LUDT messages. It can be seen from the above-mentioned technical solutions provided by the embodiments of the present invention that in one embodiment provided by the present invention, it is judged whether there is an SCCP loop between two network elements based on the GT routing results, without the need for hop counters. For detection, since GT routing is applicable to all types of connectionless service messages, the technical solution provided by the embodiment of the present invention is more efficient than the existing SCCP loop detection method and has a wider application range.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention , for those skilled in the art, other drawings can also be obtained according to these drawings without paying creative labor.

Fig. 1 is a flow chart of a method provided by the first embodiment of the present invention;

Fig. 2 is a flow chart of the method provided by the second embodiment of the present invention;

Fig. 3 is a flow chart of the method provided by the third embodiment of the present invention;

FIG. 4 is a flowchart of a method provided by a fourth embodiment of the present invention;

Fig. 5 is a flow chart of the method provided by the fifth embodiment of the present invention;

Fig. 6 is a schematic structural diagram of an embodiment of the device of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

The first embodiment of the present invention provides a method for detecting and processing an SCCP loop, the processing process of which is shown in Figure 1, and the specific implementation is as follows:

S101. The first network element performs GT routing processing on the connectionless service message sent by the second network element;

In the embodiment of the present invention, the local network element performing SCCP loop detection is called the first network element, and the network element sending the connectionless service message to the first network element is called the second network element. The GT routing processing here can be translated for the GT, that is, to find a reachable signaling point according to the address of the SCCP layer.

Wherein, the connectionless service message may include: UDT message, or XUDT message, or LUDT message, etc.

S102. The above-mentioned first network element determines whether the called address in the above-mentioned connectionless service message has been modified according to the routing result, and whether the next-hop network element is the second network element. If the called address has not been modified and the next The first-hop network element is the second network element, execute S103, otherwise, execute S104;

S103. The first network element determines that an SCCP loop is generated between the first network element and the second network element;

S104. The above-mentioned first network element forwards the above-mentioned connectionless service message to the next-hop network element according to the routing result.

Wherein, the first network element performs GT translation on the connectionless service message after receiving the connectionless service message, and if the called address is modified after the GT translation, an SCCP loop will not be generated. For example, if the first network element determines that the next-hop network element is the network element pointed to by the destination address of the connectionless service message, then the routing indication in the called address is modified to an SSN route, so that when the connectionless service message arrives There is no GT translation after the next hop, so there is no SCCP loop. Or, if the first network element modifies the GT code of the called address during the GT translation process, the GT translation result is DPC + the modified GT. In this way, even if the next-hop network element of the determined route is the second network element, After the second network element receives the connectionless service message, because the GT code in the called address is modified, the next-hop network element determined by the second network element after performing GT routing is no longer the first network element, so it does not An SCCP loop will be generated.

In the above embodiments of the present invention, judging whether there is an SCCP loop between two network elements based on the routing result is a fast detection method, which is more efficient than the existing SCCP loop detection method. In addition, since it is judged whether an SCCP loop occurs based on the GT routing result, it can also be applied to the SCCP loop detection of UDT messages, and is applicable to all types of connectionless service messages, compared with the prior art of detecting SCCP loops based on hop counters , with a wider scope of application.

The method provided by the above-mentioned embodiment of the present invention may further include:

S105. The above-mentioned first network element constructs a connectionless service message for returning fault information, and the connectionless service message for returning fault information carries SCCP loop discovery information;

Wherein, the connectionless service message used to return the fault information may include, but is not limited to: if the connectionless service message sent by the second network element is a UDT message, the connectionless service message used to return the fault information is a UDTS message; or , if the connectionless service message sent by the second network element is an XUDT message, the connectionless service message used to return the fault information is an XUDTS message; or, if the connectionless service message sent by the second network element is a LUDT message, Then the connectionless service message used to return the fault information is a LUDTS message or the like.

S106. The above-mentioned first network element sends the connectionless service message for returning the fault information to the above-mentioned second network element.

Through the above operations, the second network element is informed that an SCCP loop has occurred between itself and the first network element, and further measures can be taken, such as reporting an alarm message.

In the embodiment of the present invention, the specific implementation of the above S102 is as follows:

If the result of GT translation is DPC (Destination Point Code)+GT in the original called address of the above-mentioned connectionless service message, it is determined that the connectionless service message has not been modified; if the DPC is the above-mentioned second network element SPC (Signaling Point Code, signaling point code), then determine that the next hop network element of the route is the second network element;

If the first network element has modified the called address during the GT translation process, the first network element can mark the modification, and when judging, the first network element knows whether it has modified the called address according to the modification mark. Revise.

The embodiment of the present invention also provides another SCCP loop detection method, which is implemented in the following manner:

The NE performs SCCP loop detection based on the hop counter before entering the network or after completing data planning and before data transmission.

In this implementation mode, the operation of implementing SCCP loop detection based on the hop counter is performed in advance before business processing. Compared with the prior art, SCCP loop detection is performed during the business process, which avoids the impact of SCCP loop detection delay on business. impact.

The specific implementation manner of the embodiment of the present invention in the actual application process will be described in detail below.

second embodiment

In the second embodiment of the present invention, both the first network element and the second network element are No.7 signaling network elements, the SPC of the first network element is 11, and the SPC of the second network element is 22. Then, the processing procedure of the second embodiment of the present invention is shown in Figure 2, and the specific implementation is as follows:

S201. The first network element receives a UDT message from the second network element, and the routing mode of the UDT message is GT routing;

S202. The above-mentioned first network element performs GT translation on the above-mentioned UDT message. In the second embodiment of the present invention, the result of GT translation is 22+GT in the original called address;

S203. The above-mentioned first network element determines that an SCCP loop occurs between the first network element and the second network element;

In the GT routing process, if the network element determines that the next-hop network element is the network element pointed to by the destination address of the connectionless service message, then in the GT translation process, the routing indication is set to SSN (Sub-System Number, subsystem code) routing, and the result of GT translation is: DPC; if the network element cannot determine that the next-hop network element is the network element pointed to by the destination address of the connectionless service message, the result of GT translation is: DPC + the original called address GT, in this case, the called address is not modified. If the result of GT translation performed by the first network element on the connectionless service message is 22+GT in the original called address, it means that the called address in the connectionless service message has not been modified, and the connectionless called address The next-hop network element is the second network element. After receiving the connectionless service message, the second network element performs GT translation according to the original called address, and the next-hop network element of the determined route is still the first network element. Hence an SCCP loop is created.

S204. The first network element discards the UDT message, so as to prevent the UDT message from oscillating between the first network element and the second network element;

S205. The first network element constructs a UDTS message, and sends the UDTS message to the second network element;

The calling address of the UDTS message is the called address in the above UDT message, the called address of the UDTS message is the calling address of the above UDT message, and the content of the reason field returned in the UDTS message is "detected SCCP layer ring "Road" (wherein, the return cause field can also be other descriptions indicating that an SCCP loop occurs), and the content of other fields in the UDTS message is the same as the above UDT message;

S206. The above-mentioned first network element sends an alarm to the operation and maintenance center, so that the operation and maintenance center can modify the data configuration and completely eliminate the SCCP loop. Wherein, the implementation manner of modifying the data configuration by the operation and maintenance center may be, but not limited to: manual operation by an operator.

In the above-mentioned second embodiment of the present invention, since it is judged whether an SCCP loop occurs based on the GT routing result, it can be applied to the SCCP loop detection of UDT messages, and has a wider scope of application than the prior art of detecting SCCP loops based on hop counters .

third embodiment

In the third embodiment of the present invention, both the first network element and the second network element are No.7 signaling network elements, the SPC of the first network element is 11, and the SPC of the second network element is 22. Then, the processing procedure of the third embodiment of the present invention is shown in Figure 3, and the specific implementation is as follows:

S301. The first network element receives the XUDT message from the second network element, and the routing mode of the XUDT message is GT routing;

S302. The above-mentioned first network element determines that the second network element is the called address of the above-mentioned XUDT message, then modify the routing indication of the called address in the XUDT message to SSN routing, and the GT translation result of the above-mentioned XUDT message is 22 ;

S303. The first network element determines that no SCCP loop is generated between the first network element and the second network element;

Since the XUDT message does not undergo GT translation after reaching the second network element, an SCCP loop will not be generated. Therefore, after the first network element determines that the routing indication in the XUDT message has changed and the GT translation result is 22, it can determine that No SCCP loop is generated between the first network element and the second network element.

S304. The first network element sends the XUDT message in which the routing indication in the called address is modified to the second network element.

In the third embodiment of the present invention, if in S302, the first network element cannot determine the called address of the XUDT message, and the GT translation result is 22+GT of the original called address, then in S303, the first network element determines that An SCCP loop is generated between the first network element and the second network element, and the subsequent processing may refer to steps S204-S206 in the second embodiment.

In the above-mentioned embodiment of the present invention, since it is judged whether there is an SCCP loop between two network elements through the routing result, it is a fast detection method compared with the detection of SCCP loop based on the hop counter in the prior art, and the detection efficiency is higher.

Fourth embodiment

In the fourth embodiment of the present invention, both the first network element and the second network element are No.7 signaling network elements, the SPC of the first network element is 11, and the SPC of the second network element is 22. Then, the processing procedure of the fourth embodiment of the present invention is shown in Figure 4, and the specific implementation is as follows:

S401. The first network element receives the LUDT message from the second network element, and the routing mode of the LUDT message is GT routing;

S402. The above-mentioned first network element performs GT translation on the above-mentioned LUDT message, and the GT translation result is 22+new GT, then replace the GT in the called address with the new GT, and the new GT refers to the original called address The GT in different GT;

S403. The first network element determines that there is no SCCP loop between the first network element and the second network element;

After the first network element performs GT translation, the called address of the LUDT message is changed. After the LUDT message is sent back to the second network element, the second network element performs GT translation based on the new called address. It is no longer the first network element, so no SCCP loop will be generated between the first network element and the second network element.

S404. The first network element sends the LUDT message to the second network element.

In the fourth embodiment of the present invention, if in S402, the result of GT translation performed by the first network element is 22 + the GT of the original called address, then in S403, the first network element determines that the first network element and the second network element An SCCP loop is generated, and the subsequent processing may refer to steps S204-S206 in the second embodiment.

In the above-mentioned embodiment of the present invention, since it is judged whether there is an SCCP loop between two network elements through the routing result, it is a fast detection method compared with the detection of SCCP loop based on the hop counter in the prior art, and the detection efficiency is higher.

fifth embodiment

In the fifth embodiment of the present invention, before the network element supporting No.7 signaling is connected to the network or after completing the data planning (data planning includes: configuring data interconnected with other network elements), and before performing data transmission, based on the hop counter Perform SCCP loop detection. Its specific implementation is shown in Figure 5, including the following operations:

S501. Network element A constructs a test message;

Wherein, the test message is a special non-segmented XUDT message, the called address in the message is the GT constructed for the test message, the calling address is the GT of network element A, and the special non-segmented XUDT message can specifically be Constructed using a reserved SSN or filled with special message content.

S502. Network element A performs GT translation on the address in the test message, and sends the test message to the next-hop network element (network element B) according to the GT translation result;

S503. Network element B performs GT translation after receiving the above test message, and decrements the hop counter in the test message by 1, and sends the above test message to the next hop network element according to the GT translation result;

By analogy, until the jump counter is reduced to "0", the network element where the test message is currently located judges that an SCCP loop occurs, executes S504, discards the test message, constructs a connectionless service message for returning fault information and send;

S505. After receiving the connectionless service message for returning the fault information, the network element A sends an alarm to the operation and maintenance center, so that the operation and maintenance center can modify the data configuration and completely eliminate the SCCP loop.

All or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, the steps including the above-mentioned method embodiments are executed; The aforementioned storage medium includes various media capable of storing program codes such as ROM, RAM, magnetic disk or optical disk.

The embodiment of the present invention also provides a SCCP loop detection and processing device, the structure of which is shown in Figure 6, and the specific implementation structure includes:

A routing processing module 601, configured to perform GT routing processing on the connectionless service message sent by the second network element;

Wherein, the connectionless service message may include: UDT message, or XUDT message, or LUDT message, etc.

The loop detection module 602 is used to determine whether the called address of the above-mentioned connectionless service message is modified according to the routing result of the routing processing module 601, and whether the next-hop network element of the route is the above-mentioned second network element; if the called If the address is not modified and the next-hop network element of the route is the second network element, it is determined that an SCCP loop is generated between the local network element and the second network element.

The device provided in the embodiment of the present invention may specifically be set in the first network element, or may be the first network element.

The device provided by the above-mentioned embodiments of the present invention is a fast detection method because it judges whether there is an SCCP loop between two network elements through the routing result, which is more efficient than the existing SCCP loop detection method, and also It can be applied to SCCP loop detection of UDT messages, and has a wider application range.

The device provided by the above-mentioned embodiment of the present invention further includes: a fault notification module 603, configured to construct a connectionless service message for returning fault information, and the connectionless service message for returning fault information carries SCCP loop discovery information; and Send the connectionless service message for returning fault information to the second network element.

Through the above operations, the second network element is informed that an SCCP loop is generated between itself and the first network element, and further measures can be taken.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (6)

1. the detection processing method of a SCCP SCCP loop is characterized in that, comprising:

The connectionless service message that first network element is sent second network element is carried out global title GT route and is handled;

Described first network element judges according to route results whether the called address in the described connectionless service message is modified, and whether next jumping network element of route is described second network element;

If described called address is not modified, and next of route to jump network element be described second network element, then determine between described first network element and described second network element, to have produced the SCCP loop.

2. method according to claim 1 is characterized in that, after determining to have produced the SCCP loop between described first network element and described second network element, this method also comprises:

Described first network element is configured to return the connectionless service message of fault message, and the described connectionless service message that is used for returning fault message is carried and detected the SCCP loop information;

Described first network element sends to described second network element with the described connectionless service message that is used to return fault message.

3. method according to claim 1 and 2 is characterized in that, described first network element judges according to route results whether the called address in the described connectionless service message is modified, and whether next jumping network element of route is that described second network element comprises:

If the result of GT translation is the GT in the former called address of DPC DPC+, determine that then described connectionless service message is not modified; If described DPC is the signaling point code of described second network element, determine that then next jumping network element of route is described second network element.

4. method according to claim 1 and 2 is characterized in that, the connectionless service message that described second network element is sent is: unit data UDT message, enhancing unit data XUDT message, or long unit data LUDT message.

5. the detection processing unit of a SCCP SCCP loop is characterized in that, comprising:

Route processing module, the connectionless service message that is used for that second network element is sent are carried out global title GT route and are handled;

The loop detection module is used for the route results according to described route processing module, judges whether the called address in the described connectionless service message is modified, and whether next jumping network element of route is described second network element; If described called address is not modified and next jumping network element of described route is described second network element, then determine between local network element and described second network element, to have produced the SCCP loop.

6. device according to claim 5 is characterized in that, described device also comprises:

The signalling trouble module is used to be configured to return the connectionless service message of fault message, and the described connectionless service message that is used for returning fault message is carried and found the SCCP loop information; And the described connectionless service message that is used to return fault message sent to described second network element.

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