CN101400024A - Method and device for load balance in signaling element layer - Google Patents

Abstract

The invention discloses a load sharing method for signaling network element comprising following steps: judging if the packet is first packet after transaction TCAP packet short message; if the packet is the first packet, transmitting edition consultancy message to mobile switching centre VMSC of resort; the VMSC transmitting the short message in phasel format. The invention also discloses a short message processing system and VMSC. The multiple set of independent short message processing system and short message load scheme enhances safety of operator system, reduces redundant construction of operator.

Description

A method and device for load sharing at signaling network element level

technical field

The present invention relates to the field of communication technology, in particular to a method and equipment for load sharing at signaling network element level.

Background technique

At present, many short message centers used by mobile operators on the Internet provide short message center load sharing solutions, but the analysis of existing short message center load sharing solutions is essentially within the short message center cluster network For the load sharing of the mobile signaling network element, there is only one network element, and the short message center system accesses the wireless network through a signaling access switching device. From the signaling network element level, there is only one short message center.

The prior art has also proposed a solution of using two sets of independent short message centers for load sharing through STP (Signal Transfer Point, signaling transfer point) of signaling network elements. However, at present, the MSC (Mobile Switching Center, Mobile Switching Center) module of the GSM (Global System for Mobile Communications, Global System for Mobile Communications) network is all phase2 version or above to process short messages. For short messages with more than 67 Chinese characters (such as mobile phone A short message with a maximum allowable submission length of 70 Chinese characters) will be subpackaged at the TCAP (Transaction Capability Application Part) layer, and the TCAP layer subpackaged messages will be combined by the short message center signaling access gateway. Two sets of independent The short message center for load sharing. After the short message with 67 Chinese characters is divided into multiple packets, it may be sent to different short message centers during the signaling sharing process, causing the same short message to be forwarded through different short message centers, so that short messages submitted by users with more than 67 Chinese characters cannot Arrived at the destination terminal completely, resulting in failure to send.

Contents of the invention

Embodiments of the present invention provide a method and device for load sharing at the signaling network element level, so as to realize load sharing even when the length of a short message exceeds a predetermined number of bytes.

An embodiment of the present invention provides a method for load sharing at the signaling network element level, including the following steps:

Judging whether the received packet is the first packet after the transaction processing capability application part TCAP subpackages the short message;

If so, send a version negotiation message to the visited mobile switching center VMSC, so that the VMSC sends the short message in phase1 format.

An embodiment of the present invention provides a method for load sharing at the signaling network element level, including the following steps:

After receiving a short message whose length exceeds the preset length, sending the short message in packets according to the preset length;

After receiving the version negotiation message sent by the VMSC, send the short message in phase1 format.

The embodiment of the present invention provides a short message processing system for load sharing at the signaling network element level, including: a signaling access gateway and an SMSC server, and also includes:

The MSC subpackage signaling detection processing module is connected to the signaling access gateway, and is used to send a version negotiation message to the VMSC through the signaling access gateway when receiving TCAP layer subcontracting from the signaling access gateway , causing the VMSC to send the short message in phase1 format.

An embodiment of the present invention provides a VMSC for load sharing at the signaling network element level, including:

The short message sending module of phase2 version is used to send short messages encapsulated by phase2;

The version reduction message receiving module is used to receive the version negotiation message;

The phase1 version short message sending module is configured to use phase1 to encapsulate the short message and send it after receiving the version negotiation message.

In the embodiment of the present invention, the short message load scheme of multiple sets of independent short message processing systems based on the signaling network element level enhances the security of the operator's system and reduces the redundant construction of the operator.

Description of drawings

Fig. 1 is a structural diagram of an application system in an embodiment of the present invention;

Fig. 2 is a kind of VMSC structural diagram in the embodiment of the present invention;

Fig. 3 is a kind of short message processing system structural diagram in the embodiment of the present invention;

Fig. 4 is a flowchart of a method for load sharing at the signaling network element level in an embodiment of the present invention.

Detailed ways

The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

The application system of the embodiment of the present invention is shown in Figure 1, comprising: the short message processing system of mobile terminal, BSS (Base Station Subsystem, base station subsystem), VMSC (Visit Mobile Switching Center, mobile switching center of visiting place), STP, load sharing 1 and 2 (two short message processing systems are taken as an example in this embodiment, but actually there may be more than one). Among them, BSS is an integral part of wireless communication networks such as GSM or CDMA (Code-Division Multiple Access, Code Division Multiple Access), responsible for sending and receiving wireless signals with mobile terminals, encoding voice channels, allocating wireless channels, paging and Other functions related to wireless networks. The STP is used to send the short message to the load sharing short message processing system 1 or 2 according to the preset load sharing rule after receiving the short message from the VMSC.

Among them, VMSC is a database connected to one or more mobile service switching centers, which saves the information backup of all mobile users in the home location registers in the cells covered by these switching centers, and dynamically stores the visiting data located in its jurisdiction. User Info. Concrete structure as shown in Figure 2, comprises: phase2 version short message sending module 10, is used for adopting phase2 version to encapsulate short message to send, and after receiving version negotiation message, stops to use phase2 version to send short message; Version negotiation message receives The module 20 is used to receive the version negotiation message; the phase1 version short message sending module 30 is used to send the phase1 encapsulated short message after receiving the version negotiation message.

Wherein, the phase2 version short message sending module 10 specifically includes: a length detection submodule 11, used to detect whether the received short message exceeds a preset length; subpacket sending submodule 12, connected with the length detection submodule 11, for receiving When the short message exceeds the preset length, the short message is sent in sub-packages.

The structure of the short message processing system 1 and 2 of load sharing is identical, as shown in Figure 3, comprises: signaling access gateway 100, SMSC (Short Message Service Center, short message service center) 200 and MSC subpackage signaling detection process Module 300. In this embodiment, although the MSC packet signaling detection processing module 300 is separated from the signaling access gateway 100 for illustration, they can also be integrated together in practical applications. The MSC subpackage signaling detection processing module monitors the TCAP message, performs signaling exchange processing according to the TCAP specification for the short message TCAP layer subpackage, and sends feedback signaling to the signaling access gateway 100 after processing, so that the signaling access gateway 100 ends The session is waiting for the group package, and forwards the version negotiation message to the VMSC that initiates the TCAP layer sub-packet message, requests the VMSC to downgrade to phase1 version, stops sending the second sub-packet, reduces the length of the sent message packet, and resubmits with phase1 version signaling short message.

The MSC subpackage signaling detection processing module 300 specifically includes: a detection submodule 310, for detecting whether the message received is data subcontracted through the TCAP layer; a negotiation message sending submodule 320, connected with the detection submodule 310, for detection After receiving the subpackaged data, the access gateway sends a version negotiation message to the VMSC through the signaling, so that the VMSC sends a short message in phase1 format.

A method for load sharing at the signaling network element level in an embodiment of the present invention is shown in Figure 4, including the following steps:

In step s401, the VMSC receives the short message sent by the mobile terminal through the BSS, and the length of the short message is greater than the preset length (usually, the byte length allowed by the mobile phone is 67 bytes).

Step s402, VMSC performs TCAP layer packetization, adopts ETSI phase2 version MO message format (the frame composition format of the short message can refer to the phase2 version protocol of ETSI 0902) to send the first packet to STP. The basic unit of a TCAP message is a component. A component corresponds to an operation request or response. A message can contain multiple components. The meaning of information contained in a component is defined by the user. The related components constitute a dialog, a dialog The process can realize an application business process.

In step s403, the STP forwards the signaling to one of the short message processing systems (for example, to the short message processing system 1) according to the principle of signaling load sharing. Wherein, the load sharing principle may include mechanisms such as link load balancing, and may also pre-specify which types of short messages are sent to which short message processing systems.

Step s404, after receiving the short message, the signaling access gateway of the short message processing system 1 forwards the short message to the MSC packet signaling detection processing module.

Step s405, the MSC subpackage signaling detection processing module performs message analysis, if it is an ordinary message, it is transparently transmitted to the signaling access gateway, if it is the first subpackage message of a short message, it triggers a version down processing mechanism, and through the signaling connection The ingress gateway sends a version negotiation message to the VMSC, requesting to downgrade the version of the short message sent from the phase2 format to the phase1 format.

Step s406, after the VMSC receives the version negotiation message, it releases the previous session, that is, it stops sending the short message in the phase2 format; instead, it adopts the phase1 format (the frame composition format of the short message can refer to ETSI

0902 phase1 version protocol) signaling format to send the short message, and complete the sending of the short message with a packet again.

In step s407, the STP forwards the signaling to one of the short message processing systems (short message processing system 1 or 2) according to the principle of signaling load sharing.

In step s408, the short message processing system that receives the short message forwards the short message to the destination mobile terminal, and the destination mobile terminal successfully receives the short message exceeding 67 bytes.

In the embodiment of the present invention, when the short message processing system detects that the user submits a short message exceeding the preset Chinese character length, the version negotiation message is forwarded to the VMSC that initiates the TCAP layer packet message, and the short message processing module of the VMSC is requested to drop to phase1 version , VMSC completes the submission of the short message with phase1 version signaling again in one package, ensuring that the short message processing system for signaling network element load sharing can normally receive and forward short messages with a preset length of Chinese characters or more submitted by mobile phone users. Ensure that this message, like other short messages shorter than the preset length of Chinese characters, is normally processed by STP load sharing to a load sharing short message processing system, so as to ensure that under the load sharing scheme of two independent short message processing systems, users Can successfully send any byte short message.

Through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is a better implementation Way. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions to make a A computer device (which may be a personal computer, a server, or a network device, etc.) executes the methods described in various embodiments of the present invention.

The above disclosures are only a few specific embodiments of the present invention, however, the present invention is not limited thereto, and any changes conceivable by those skilled in the art shall fall within the protection scope of the present invention.

Claims (10)

1. A method for load sharing at the signaling network element level, characterized in that it comprises the following steps: Judging whether the received packet is the first packet after the transaction processing capability application part TCAP subpackages the short message; If so, send a version negotiation message to the visited mobile switching center VMSC, so that the VMSC sends the short message in phase1 format. 2. The method for load sharing at the signaling network element level according to claim 1, wherein, before the VMSC sends the short message in phase1 format, it includes: Stop sending the short message in phase2 format. 3. The method for load sharing at the signaling network element level according to claim 2, wherein the TCAP subcontracting the short message specifically includes: Judging whether the length of the short message exceeds the preset length, if so, sending the short message in packets according to the preset length. 4. A method for load sharing at the signaling network element level, comprising the following steps: After receiving a short message whose length exceeds the preset length, sending the short message in packets according to the preset length; After receiving the version negotiation message sent by the VMSC, send the short message in phase1 format. 5. The method for load sharing at the signaling network element level according to claim 4, wherein said sending said short message in phase1 format specifically comprises: Stop sending the short message in phase2 format; The short message is sent in phase1 format. 6. A short message processing system for load sharing at the signaling network element level, comprising: a signaling access gateway and an SMSC server, characterized in that it also includes: The MSC subpackage signaling detection processing module is connected to the signaling access gateway, and is used to send a version negotiation message to the VMSC through the signaling access gateway when receiving TCAP layer subcontracting from the signaling access gateway , causing the VMSC to send the short message in phase1 format. 7. The short message processing system of signaling network element level load sharing as claimed in claim 6, wherein the MSC subpackage signaling detection processing module specifically includes: The detection sub-module is used to detect whether the received message is data subcontracted through the TCAP layer; The negotiation message sending submodule is connected with the detection submodule, and is used to send a version negotiation message to the VMSC through the signaling access gateway after detecting the packetized data, so that the VMSC sends the version negotiation message in phase1 format. short message. 8. A VMSC for signaling network element level load sharing, characterized in that it includes: The short message sending module of phase2 version is used to send short messages encapsulated by phase2; The version reduction message receiving module is used to receive the version negotiation message; The phase1 version short message sending module is configured to use phase1 to encapsulate the short message and send it after receiving the version negotiation message. 9. The VSMC for load sharing at the signaling network element level according to claim 8, wherein the phase2 version short message sending module stops using the phase2 version to send short messages after receiving the version negotiation message. 10. The VSMC for load sharing at the signaling network element level according to claim 8, wherein the phase2 version short message sending module specifically includes: The length detection submodule is used to detect whether the received short message exceeds the preset length; The sub-package sending sub-module is connected with the length detection sub-module, and is used for sending the short message into sub-packages when the received short message exceeds a preset length.

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