CN100407875C - The realization method of triggering the optimal routing of intelligent service in the called place - Google Patents

Abstract

The present invention provides a method for realizing the optimal routing of triggering intelligent services at the called party's home location: after receiving the initial address information sent by the calling party, the switch sends routing request information to the called party's home location register; the called party HLR judges whether the exchange is a toll exchange according to the source signaling point information in the routing request information, if so, sends the initial address information to the called party mobile switching center through the toll exchange, and the information is: increase the called party The ISDN number of the called party's mobile station prefixed with the number of the mobile switching center; the called party's mobile switching center triggers the user application service of the enhanced logic of the mobile network under the control of the service control node. In the present invention, the long-distance exchange directly arrives at the called roaming MSC through the optimal route, and triggers the CAMEL service at the called roaming MSC, which not only meets the country's optimal routing standard, but also facilitates the local mobile network operator to develop the CAMEL service more conveniently .

Description

The realization method of triggering the optimal routing of intelligent service in the called place

technical field

The invention relates to the roaming technology of long-distance telephone in mobile communication, in particular to a method for realizing optimal route triggering intelligent service at the called home place.

Background technique

In the prior art, some foreign standards stipulate that the long-distance exchange must have the optimal routing function, that is, when it is required to be called as a mobile user, the long-distance exchange must directly request HLR (Home Location Register, Home Location Register) to obtain MSRN (Mobile Station Roaming Number, roaming number) and then route directly to the called roaming destination. Since the country's operators are divided into local and long-distance, if they are called smart users, under optimal routing conditions, it means that the long-distance switch must complete CAMEL (Customized Applications for Mobile Network Enhanced Logic, user application for mobile network enhanced logic) processing. However, since there are many operators in the local network, and their CAMEL services are also different from each other, it is more complicated to adapt the CAMEL services of many operators in the long-distance switch.

The following takes the GSM (Global System for Mobile communications, Global System for Mobile Communications) network to obtain the flow of the called routing information as an example to illustrate the prior art. When the calling party is a fixed terminal, the local network 1 communicates with the local network through the long-distance network 2 communication, wherein, local network 1 includes PSTN (Public Switched Telephone Network, public switched telephone network)/MSC (MobileSwitching Center, mobile switching center), long-distance network includes long-distance switch 1 and long-distance switch 2, and local network 2 includes HLR, MSC /VLR (Visitor Location Register, visit location register) and SCP (Service Control Point, business control point). Among them, the VLR is usually set up together with the MSC, and stores the relevant user data of the mobile station in the area under the jurisdiction of the MSC, including: user number, location area information of the mobile station, user status, and services available to the user. HLR is used for mobile user management data, each mobile user should be registered in its home location register, mainly store two types of information: one is the parameters about mobile users, including mobile user identification numbers, access capabilities, user categories and supplementary The first is the information about the current location of the mobile user, so as to establish the call route to the mobile station, such as MSC, VLR address, etc.

The specific process is shown in Figure 1, including the following steps:

1. The calling party sends MSISDN information to the toll switch 1 in the toll network through the PSTN in the local network 1.

2. The toll switch 1 sends MAP_SEND_ROUTING_INFORMATION information to the HLR in the local network 2, and the HLR converts the MSISDN into an IMSI, and finds out the service area to which the called party belongs according to the IMSI.

3. The HLR sends MAP_PROVIDE_SUBSCRIBER_INFORMATION information to the MSC/VLR in the local network 2 to request to obtain user status, location and CAMEL subscription information.

4. The MSC/VLR sends a MAP_PROVIDE_SUBSCRIBER_INFORMATION_ACK response message to the HLR.

5. The HLR sends a MAP_SEND_ROUTING_INFORMATION_ACK response message to the toll switch 1, including user status, location, and CAMEL subscription information.

6. The toll switch 1 sends MAP_SEND_ROUTING_INFORMATION information to the HLR in the local network 2.

7. The HLR sends a MAP_PROVIDE_ROAMING_NUMBER_INFORMATION message to the MSC/VLR in the local network 2, and sends an IMSI to the VLR in this area to request allocation of a roaming number (MSRN).

8. The MSC/VLR sends a MAP_PROVIDE_ROAMING_NUMBER_INFORMATION_ACK response message to the HLR, and the VLR to which the called mobile station belongs returns the allocated MSRN to the HLR.

9. The HLR sends a MAP_SEND_ROUTING_INFORMATION_ACK response message to the toll switch 1, and then the HLR sends it to the PSTN to which the calling party belongs.

10. The toll switch 1 triggers corresponding intelligent services according to the CAMEL information.

11. The toll switch 1 sends the IAM (with MSRN) to the called MSC/VLR in the roaming place through the toll switch 2.

12. The MSC/VLR initiates a call setup SETUP to the mobile station MS.

The above step 2-5 is the first time that the toll switch 1 obtains the routing information; the above step 6-9 is the second time that the toll switch 1 obtains the routing information.

When the calling party is a mobile terminal, the specific process is as shown in Figure 2. Except that the public switched telephone network is replaced with a mobile switching terminal in the local network 1, other processing procedures are the same as in Figure 1, and will not be repeated here.

Existing networks require long-distance switches to implement both optimal routing and CAMEL service triggering, requiring local network operators to coordinate with long-distance network operators to implement their corresponding CAMEL services, which is not conducive to rapid service provision and settlement. If CAMEL service triggering is to be implemented in the called home network, the toll switch cannot obtain the routing information, and the called number needs to be routed to the called home network MSC through the MSISDN, which is not necessarily the called roaming MSC, and the optimal optimal routing.

In addition, the long-distance network and the local network belong to different operators, and there are many local network operators, and many CAMELs are carried out. Therefore, it is more complicated to implement the CAMEL services of many local network operators on the long-distance network operator's switch.

Contents of the invention

The problem to be solved by the present invention is to provide a realization method of triggering the optimal route of the intelligent service at the called home network, so as to solve the defect that the prior art cannot trigger the CAMEL service at the called home network and realize the optimal route.

In order to solve the above-mentioned problem, the present invention provides a kind of realization method of triggering the optimal routing of intelligent service at the called place, comprising the following steps:

A. After the exchange receives the initial address information sent by the calling party, it sends a routing request message to the called party's home location register;

B. The called party home location register judges whether the switch is a toll switch according to the source signaling point information in the routing request information, and if so, then turn to step C;

C. The called party's home location register sends initial address information to the called party's mobile switching center through the toll switch, and the information is: the called party's mobile station ISDN number with the prefix of the called party's mobile switching center number added ;

D. The mobile switching center of the called party triggers the user application service of the enhanced logic of the mobile network under the control of the service control node.

Step C further includes:

C 1. The called party's home location register sends a routing response message to the toll switch, which includes the called party's mobile station integrated service digital network number added with the prefix of the called party's mobile switching center number;

C2. The toll switch sends initial address information to the called party's mobile switching center, which is: the called party's mobile station ISDN number with the prefix of the called party's mobile switching center number added.

The format of the ISDN number of the called party's mobile station added with the prefix of the number of the called party's mobile switching center in step C is: the number of the called party's mobile switching center + the number of the called party's mobile station's ISDN.

Between step C and step D also include:

The called party mobile switching center deducts the called party mobile switching center number prefix from the initial address information.

Step D further comprises:

D1. The called party's mobile switching center acquires user information from the called party's home location register;

D2. The service control node controls the called party's mobile switching center to trigger the user application service of the mobile network enhancement logic.

Step D1 further comprises:

D11. The called party's mobile switching center obtains the subscription information from the called party's home location register;

D12. The mobile switching center of the called party obtains the roaming number from the HLR of the called party.

Step D11 further comprises:

D111. The called party's mobile switching center sends the routing request information to the called party's home location register;

D112. The called party's home location register sends the subscription request information to the called party's mobile switching center;

D113. The called party's mobile switching center sends the subscription response information to the called party's home location register;

D114. The called party's home location register sends routing response information to the called party's mobile switching center.

The subscription information includes: a service control node address and a service key, the service key identifies the triggered service, and the service control node address is used to address a specific service control node.

Step D12 further comprises:

D121. The called party's mobile switching center sends the routing request information to the called party's home location register;

D122. The called party's home location register sends a roaming number request information to the called party's mobile switching center;

D123. The called party's mobile switching center sends a roaming number response information to the called party's home location register;

D124. The called party's home location register sends routing response information to the called party's mobile switching center.

Step D2 further comprises:

D21. The service control node establishes a call connection with the called party's mobile switching center;

D22. The service control node triggers the user application service of the enhanced logic of the mobile network.

When establishing a call connection, the mobile switching center of the called party sets the destination routing address, and connects the user application service of the mobile network enhanced logic to the mobile station of the called party according to the destination routing address.

There are one or more toll switches.

Compared with the prior art, the present invention has the following advantages:

In the present invention, the long-distance exchange directly arrives at the called roaming MSC through the optimal route, and triggers the CAMEL service at the called roaming MSC, which not only meets the country's optimal routing standard, but also facilitates the local mobile network operator to develop the CAMEL service more conveniently .

In addition, the long-distance switch should only be responsible for routing and forwarding, and the local mobile network MSC implements CAMEL service triggering, each performing its own duties, making the network functions more clear and easy to expand.

Description of drawings

Fig. 1 is a flow chart of getting called routing information when the calling party is a fixed terminal in the prior art GSM system;

Fig. 2 is a flow chart of getting called routing information when the calling party is a mobile terminal in the prior art GSM system;

Fig. 3 is the flow chart of the implementation method of the smart service triggering of the called home place under the optimal route of the present invention;

Fig. 4 is the mobile station ISDN number structural diagram;

Fig. 5 is a structural diagram of valid ISDN numbers in China in Fig. 4;

FIG. 6 is a flow chart of a specific embodiment of the present invention when the calling party is a fixed terminal;

Fig. 7 is a flowchart of a specific embodiment of the present invention where the calling party is a mobile terminal.

Detailed ways

Specific embodiments of the present invention are described below in conjunction with accompanying drawing:

The process flow of an implementation method for triggering an optimal routing of an intelligent service at the called place of the present invention is shown in Figure 3, including the following steps:

In step s101, after receiving the initial address information sent by the calling party, the switch sends routing request information to the called party's home location register. Wherein, the initial address information sent by the calling party includes the ISDN (Integrated Service Digital Network, Integrated Service Digital Network) number of the mobile station of the called party. The ISDN number of the mobile station is the number dialed by the calling user when calling a certain user in the digital public land cellular mobile communication network. ; China's domestic effective ISDN number is an 11-digit equal-length number, the structure of which is shown in Figure 5, including: mobile service access number (N1N2N3), HLR identification number (H ₀ H ₁ H ₂ H ₃ ) and mobile subscriber The mobile service access number (ABCD), among them, the mobile service access number is used to identify different mobile systems. The current mobile service access number is 135-139; China Unicom is 130; the HLR identification number can contain one or several H ₀ H For the value of ₁ H ₂ H ₃ , when H ₀ is equal to 0, H ₁ H ₂ is distributed uniformly by the whole country, and H ₃ is distributed by each province; when H ₀ is not equal to 0, H ₀ H ₁ H ₂ is distributed uniformly by the whole country. The mobile subscriber number is the number of the mobile subscriber in each HLR, which is allocated by each HLR.

Step s102, the called party's home location register judges whether the exchange is a toll exchange according to the source signaling point information in the routing request information, and if so, the called party's home location register no longer requests the called party's mobile switching center to provide roaming number, and go to step s103; if it is from a local network, it is the same as the normal call flow. The source signaling point information consists of 3 bytes, including the source address of the information.

Step s103, the called party's home location register sends initial address information to the called party's mobile switching center through the toll switch, and the information is: the called party's mobile station ISDN number added with the prefix of the called party's mobile switching center number. The effect of the number prefix of the called party's mobile switching center is equivalent to MSRN, and is used to realize optimal routing. This step further includes: the called party's home location register sends a routing response message to the toll switch, which includes the mobile station ISDN that adds the prefix of the called party's mobile switching center number; the toll switch sends the initial address to the called party's mobile switching center Information, the information is: the ISDN number of the called party's mobile station with the prefix of the number of the called party's mobile switching center added.

In step s104, the called party's mobile switching center triggers the user application service of the mobile network enhancement logic under the control of the service control node. This step further includes: the called party's mobile switching center acquires user information from the called party's home location register, and the service control node controls the called party's mobile switching center to trigger the user application service of the mobile network enhancement logic. Wherein, the called party's mobile switching center acquires user information from the called party's home location register, including subscription information and roaming number. The process of obtaining the subscription information includes: the called party's mobile switching center sends a routing request information to the called party's home location register; the called party's home location register sends a subscription request information to the called party's mobile switching center; The center sends a subscription response message to the called party's home location register; the called party's home location register sends a routing response message to the called party's mobile switching center. The subscription information includes: a service control node address and a service key, the service key identifies the triggered service, and the service control node address is used to address a specific service control node.

The process of obtaining a roaming number includes: the called party's mobile switching center sends a routing request message to the called party's home location register; the called party's home location register sends a roaming number request message to the called party's mobile switching center; the called party's mobile The switching center sends a response message of providing a roaming number to the called party's home location register; the called party's home location register sends a routing response message to the called party's mobile switching center.

Before the called party mobile switching center obtains the user information, it needs to deduct the called party mobile switching center number prefix from the initial address information.

Wherein, the service control node controls the called party mobile switching center to trigger the mobile network enhanced logic user application service further includes: the service control node establishes a call connection with the called party mobile switching center, and the called party mobile switching center sets the destination routing address, Connect the intelligent service to the mobile station of the called party according to the destination routing address; then the service control node triggers the user application service of the mobile network enhancement logic.

The present invention is described in detail below with a specific embodiment, as shown in Figure 6:

1. The calling party sends the initial address information IAM to the toll switch 1 in the toll network through the PSTN in the local network 1 (if the calling party is a fixed terminal), which includes the ISDN (MSISDN) of the called party's mobile station.

2. The toll switch 1 sends the routing request information MAP_SEND_ROUTING_INFORMATION to the HLR in the local network 2.

3. The HLR sends routing response information MAP_SEND_ROUTING_INFORMATION_ACK to the toll switch 1 . The MSRN parameter in this information is: the called party's mobile switching center number prefix MSC NO + the called party's MSISDN. Among them, the effect of MSC NO is equivalent to MSRN, which is used to realize optimal routing. The long-distance switch only needs to route the call with the called number prefixed with MSC NO directly to the called party's mobile switching center, and all the long-distance network switches that pass through do not need to do any processing, and the format of the called number in the IAM information is retained: called party MSC NO+Called party MSISDN.

4. Toll switch 1 sends IAM information to the mobile switching center in local network 2 through toll switch 2, the information is MSC NO+called party MSISDN; after receiving the IAM information, the called party mobile switching center deducts the MSC NO . Of course, there may be one or more toll switches in the toll network.

5. The mobile switching center of the called party sends the routing request information MAP_SEND_ROUTING_INFORMATION to the HLR of the called party.

6. The called party's home location register sends the subscription provision request information MAP_PROVIDE_SUBSCRIBER_INFORMATION to the called party's mobile switching center.

7. The called party's mobile switching center sends the subscription provision response information MAP_PROVIDE_SUBSCRIBER_INFORMATION_ACK to the called party's home location register.

8. The called party's home location register sends a routing response message MAP_SEND_ROUTING_INFORMATION_ACK to the called party's mobile switching center.

9. The mobile switching center of the called party sends the routing request information MAP_SEND_ROUTING_INFORMATION to the HLR of the called party.

10. The called party's home location register sends a roaming number provision request message MAP_PROVIDE_ROAMING_NUMBER to the called party's mobile switching center.

11. The mobile switching center of the called party sends a roaming number provision response message MAP_PROVIDE_ROAMING_NUMBER_ACK to the called party's home location register.

12. The called party's home location register sends a routing response message MAP_SEND_ROUTING_INFORMATION_ACK to the called party's mobile switching center.

13. The service control node and the mobile switching center trigger the CAMEL service.

14. Connect the intelligent service to the mobile station of the called party.

When the calling party is a mobile terminal, the specific flow is as shown in Figure 7, except that it is used in the local network 1 to replace the public switched telephone network with a mobile switching terminal, other processing procedures are the same as in Figure 6, and will not be repeated here.

In addition, the present invention is not only applicable to GSM, but also applicable to WCDMA and CDMA.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (12)

1. an implementation method of triggering the optimal route of intelligent service at the called home, is characterized in that, comprises the following steps: A. After the exchange receives the initial address information sent by the calling party, it sends a routing request message to the called party's home location register; B. The called party home location register judges whether the switch is a toll switch according to the source signaling point information in the routing request information, and if so, then turn to step C; C. The called party's home location register sends initial address information to the called party's mobile switching center through the toll switch, and the information is: the called party's mobile station ISDN number with the prefix of the called party's mobile switching center number added ; D. The mobile switching center of the called party triggers the user application service of the enhanced logic of the mobile network under the control of the service control node. 2. as claimed in claim 1, the realization method of triggering the optimal route of intelligent service at the called home place, is characterized in that, step C further comprises: C1. The called party's home location register sends a routing response message to the toll exchange, which includes the called party's mobile station integrated service digital network number added with the prefix of the called party's mobile switching center number; C2. The toll switch sends initial address information to the called party's mobile switching center, which is: the called party's mobile station ISDN number with the prefix of the called party's mobile switching center number added. 3. as claimed in claim 1 or 2, the realization method of triggering the optimal route of intelligent service at the called home place is characterized in that, the called party mobile station integrated service number of said adding called party mobile switching center number prefix The format of the network number is: the called party's mobile switching center number + the called party's mobile station ISDN number. 4. as claimed in claim 1, the realization method of triggering the optimal route of the smart service at the called home place is characterized in that, between step C and step D, it also includes: The called party mobile switching center deducts the called party mobile switching center number prefix from the initial address information. 5. as claimed in claim 1, triggering the realization method of the optimal route of intelligent service at the called home place, it is characterized in that, step D further comprises: D1. The called party's mobile switching center acquires user information from the called party's home location register; D2. The service control node controls the called party's mobile switching center to trigger the user application service of the mobile network enhancement logic. 6. The realization method of triggering the optimal routing of the intelligent service at the called home place as claimed in claim 5, characterized in that, step D1 further comprises: D11. The called party's mobile switching center obtains the subscription information from the called party's home location register; D12. The mobile switching center of the called party obtains the roaming number from the HLR of the called party. 7. The realization method of triggering the optimal routing of the intelligent service at the called home place as claimed in claim 6, characterized in that, step D11 further comprises: D111. The called party's mobile switching center sends the routing request information to the called party's home location register; D112. The called party's home location register sends the subscription request information to the called party's mobile switching center; D113. The called party's mobile switching center sends the subscription response information to the called party's home location register; D114. The called party's home location register sends routing response information to the called party's mobile switching center. 8. As claimed in claim 6 or 7, the realization method of triggering the optimal routing of the intelligent service at the called place is characterized in that the subscription information includes: service control node address and service key, and the service key identifies the triggered service , the service control node address is used to address a specific service control node. 9. The realization method of triggering the optimal route of the intelligent service at the called home place as claimed in claim 6, characterized in that, step D12 further comprises: D121. The called party's mobile switching center sends the routing request information to the called party's home location register; D122. The called party's home location register sends a roaming number request information to the called party's mobile switching center; D123. The called party's mobile switching center sends a roaming number response information to the called party's home location register; D124. The called party's home location register sends routing response information to the called party's mobile switching center. 10. The realization method of triggering the optimal routing of the intelligent service at the called home place as claimed in claim 5, characterized in that, step D2 further comprises: D21. The service control node establishes a call connection with the called party's mobile switching center; D22. The service control node triggers the user application service of the enhanced logic of the mobile network. 11. as claimed in claim 10, the realization method of triggering the optimal route of intelligent service in the called home place is characterized in that, when setting up the call connection, the called party's mobile switching center sets the destination routing address, and according to the destination routing address Connect the user application service of the mobile network enhancement logic to the called party mobile station. 12. The method for realizing the optimal route triggering the intelligent service at the called place according to claim 1, characterized in that there are one or more toll switches.

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