CN102404869A - Method, system and mobile gateway office for virtual private mobile network calling - Google Patents

Abstract

The present invention provides a method, system and mobile gateway for virtual private mobile network (VPMN) calling, wherein the method comprises: receiving a call request, wherein the call request includes a calling number and a called number; sending the called number to the called party's home location register (HLR); receiving a service key fed back by the called party's home HLR, judging whether the service key is a VPMN service key and the call source of the call request is another network, and if so, directly sending termination suppression intelligent subscription information (T_CSI) to the called party's home HLR; receiving the called party's roaming number returned by the called party's home HLR, and connecting the called party. The virtual private mobile network calling solution of the present invention reduces the processing load of network elements.

Description

Method, system and mobile gateway office for virtual private mobile network calling

technical field

The present invention relates to the field of mobile intelligent network communication, in particular to a method, a system and a mobile gateway office for virtual private mobile network (VPMN, Virtual Private Mobile Network) calling.

Background technique

The invention relates to the VPMN call in the mobile intelligent network service, and is aimed at the call of the called VPMN user. The invention does not limit the calling user, which can be a VPMN user or a non-VPMN user. Here, for ease of description, the network where the called user is located is referred to as the home network, and other networks other than the home network are called other networks.

Referring to Fig. 1, it is the method flowchart of VPMN call in the prior art, and this network is mobile network in this embodiment, and this method comprises the following steps:

Step 101, the mobile gateway office receives a call request.

The call request may specifically be an Initial Address Message (IAM, Initial Address Message), and the IAM includes a calling number and a called number.

The call request can be sent by another network or by this network; the other network is, for example, China Telecom or China Unicom. In this embodiment, it is assumed that the calling source is another network, that is, the call request is sent by the other network.

Step 102, the mobile gateway office sends a routing information acquisition request (SEND_ROUTING_INFORMATION_REQ) to the called home Home Location Register (HLR, Home Location Register), and the routing information acquisition request includes the called number.

Step 103, the mobile gateway office receives the route acquisition response message (SEND_ROUTING_INFORMATION_CNF) fed back by the called home HLR, which includes termination smart contract information (T_CSI, Termination CAMEL Subscription Information), contract service control point (SCP, Service Control Point) address and called user service list and other information.

After receiving the route information acquisition request sent by the mobile gateway office, the called home HLR returns a route acquisition response message to the mobile gateway office. The route acquisition response message includes information such as T_CSI, contracted SCP address, and called user service list. The T_CSI includes a service key (SERVICE KEY), and the service key indicates the service type related to the called number, and the service type includes VPMN service or charging service, etc. In the pre-account opening process, the HLR saved information such as the T_CSI corresponding to the called number, the contracted SCP address, and the service list of the called user; , the corresponding T_CSI, contracted SCP address, service list of the called user and other information can be queried according to the called number, and the contracted SCP address is also the called home SCP address.

Step 104, the mobile gateway office sends a Transaction Capabilities Application Part (TCAP, Transaction Capabilities Application Part) layer request (TC_INVOKE_REQ) message to the called home SCP according to the called home SCP address, and triggers the call to the called home SCP for processing.

The TC_INVOKE_REQ message contains the business key.

The process that triggers the called home SCP to process is called the T_CSI process.

Step 105, the mobile gateway office receives the TCAP layer request indication (TC_INVOKE_IND) message fed back by the called home SCP.

After receiving the TC_INVOKE_REQ message, the called home SCP judges whether corresponding processing is required, if necessary, performs corresponding processing, and then feeds back a TC_INVOKE_IND message to the mobile gateway office; if not, directly feeds back a TC_INVOKE_IND message to the mobile gateway office. For example: in the case that the service key is a charging service key, the called home SCP needs to perform corresponding payment processing. Another example: when the service key is a VPMN service key, the called home SCP needs to judge whether the caller and the called party of this call are users of the same VPMN group. If so, the called home SCP needs to perform long and short number translation processing, if If not, the called home SCP does not translate the long and short numbers.

In step 106, the mobile gateway office sends a routing information acquisition request including suppressed T_CSI to the called home HLR.

Step 107, the mobile gateway office receives the route acquisition response message fed back by the called home HLR, and the acquisition response message includes the roaming number of the called user.

Because the route information acquisition request contains suppressed T_CSI, the called home HLR no longer feeds back information such as T_CSI, subscribed SCP address, and called user's service list, but feeds back the called user's roaming number.

In step 108, the mobile gateway connects the called party according to the received roaming number of the called party.

After obtaining the roaming number of the called party, the mobile gateway office performs intra-network connection; at the same time, the mobile gateway office also returns an address complete message (ACM, Address Complete Message) to the calling gateway office.

With the VPMN call flow shown in Figure 1, steps 104 to 105 must be performed, that is, no matter whether the SCP performs corresponding processing, the call needs to be connected to the SCP to trigger the T_CSI process. This increases the burden on network elements such as SCPs and mobile gateway offices.

Contents of the invention

The invention provides a VPMN calling method, which can reduce the processing load of network elements.

The invention provides a VPMN calling system, which can reduce the processing load of network elements.

The invention provides a mobile gateway office, which can reduce the processing load of network elements.

A method for VPMN calling, the method comprising:

receiving a call request, the call request includes the calling and called numbers;

Send the called number to the called home home location register HLR;

Receive the service key fed back by the called home HLR, judge whether the service key is a VPMN service key and the call source of the call request is another network, and if so, directly send the suppression termination smart contract information T_CSI to the called home HLR ;

Receive the called roaming number returned by the called home HLR, and connect the called party.

A system for VPMN calling, the system includes a mobile gateway office and a called home HLR;

The mobile gateway office is used to receive a call request containing the calling and called number, and send the called number to the called home HLR; receive the service key fed back by the called home HLR, and determine whether the service key is a VPMN service key and the The call source of the call request is another network, if it is, then directly send the suppression T_CSI to the called home HLR; receive the called roaming number returned by the called home HLR, and connect to the called party;

The called home HLR is used to receive the called number sent by the mobile gateway, and feed back the service key to the mobile gateway according to the called number; receive the suppression T_CSI sent by the mobile gateway, and return the called roaming number to the mobile gateway.

A mobile gateway office, the mobile gateway office includes a call request receiving unit, a routing information acquisition unit, a judgment unit and a call connection unit;

The call request receiving unit receives the call request containing the calling and called numbers and sends it to the routing information obtaining unit;

The routing information acquisition unit receives the call request and sends a routing information acquisition request including the called number to the called home HLR;

The judging unit receives the service key fed back by the called home HLR, and judges whether the service key is a VPMN service key and the call source of the call request is another network, and if so, directly sends the suppression T_CSI to the called home HLR;

The call connecting unit receives the called roaming number returned by the called home HLR, and connects the called.

As can be seen from the above scheme, the present invention judges before triggering the SCP connection, if the service key is a VPMN service key and the call source of the call request is another network, then the SCP is not triggered, and the suppressed T_CSI is directly sent to the called home HLR, To obtain the called roaming number for subsequent call connection. In this way, in the VPMN call, there is no need to trigger the SCP every time, which reduces the number of times the SCP is triggered, thereby reducing the processing load of the SCP and shortening the call connection time.

Description of drawings

Fig. 1 is the method flowchart of prior art VPMN call;

Fig. 2 is a schematic flowchart of a method for VPMN calling in the present invention;

Fig. 3 is the method flowchart example of VPMN call of the present invention;

FIG. 4 is a schematic diagram of the system structure of a VPMN call in the present invention.

Detailed ways

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 embodiments and accompanying drawings.

Through the summary of long-term practical applications, it is found that in the flow chart of Fig. 1, for the calling source is another network, and the called user is a VPMN user, that is, in step 103, the service key fed back by the called home HLR is a VPMN service key. No need to trigger SCP for T_CSI procedure. Therefore, in the VPMN call scheme provided by the present invention, the service key and the calling source are judged before triggering the SCP connection. The home HLR sends the suppression T_CSI to obtain the called roaming number for subsequent call connection. In this way, the times of triggering the SCP are reduced, thereby reducing the processing load of the SCP, the local gateway office and other network elements, and shortening the call connection time.

Referring to Fig. 2, it is an exemplary flowchart of a method for VPMN calling in the present invention, the method may include the following steps:

In step 201, a call request is received, and the call request includes calling and called numbers.

Step 202, sending the called number to the called home HLR.

The called number can be sent to the called home HLR in a variety of ways. Specifically, the called number can be included in the routing information acquisition request and sent to the called home HLR. Here we will take the inclusion in the routing information acquisition request as an example for illustration .

Step 203, receiving the service key fed back by the called home HLR.

The called home HLR can feed back the service key in various ways, for example, it can be included in the routing response message; in this process, feedback through the routing response message is taken as an example for illustration.

In the pre-account opening process, the HLR saved information such as the T_CSI corresponding to the called number, the contracted SCP address, and the service list of the called user; , the corresponding T_CSI, contracted SCP address, and called user service list can be queried according to the called number. The contracted SCP address is also the called home SCP address, and the T_CSI contains the service key.

Step 204, judging whether the service key received in step 203 is a VPMN service key and the call source of the call request is another network, if yes, execute step 205; otherwise, follow the normal process to continue the call.

If the service key is a VPMN service, that is, the called party is a VPMN user, and the calling source is another network, then the SCP is not triggered, and step 205 is directly performed; for other cases, the call is continued according to the normal process, that is, the SCP is triggered , perform the T_CSI process and subsequent call processing.

Step 205, directly send the suppression T_CSI to the called home HLR.

Sending the suppression T_CSI to the called home HLR can be implemented in various ways, for example, it can be included in the routing information acquisition request and sent to the called home HLR.

Step 206: Receive the called roaming number returned by the called home HLR, and connect the called party.

Below, the VPMN call of the present invention is illustrated by Fig. 3, and the flow process of Fig. 3 includes the following steps:

In step 301, the mobile gateway office receives a call request.

The call request may specifically be an IAM, and the IAM includes a calling number and a called number.

The call request can be sent by another network or by this network; the other network is, for example, China Telecom or China Unicom. In this embodiment, it is assumed that the calling source is another network, that is, the call request is sent by the other network.

Step 302, the mobile gateway office sends a routing information acquisition request to the called home HLR, and the routing information acquisition request includes the called number.

In step 303, the mobile gateway office receives a route acquisition response message fed back by the called home HLR, and the route acquisition response message includes information such as T_CSI, contracted SCP address, and called user service list.

After receiving the route information acquisition request sent by the mobile gateway office, the called home HLR returns a route acquisition response message to the mobile gateway office. The route acquisition response message includes information such as T_CSI, contracted SCP address, and called user service list. The T_CSI includes a service key, which indicates the service type related to the called number, and the service type includes VPMN service or billing service, etc. In the pre-account opening process, the HLR saved information such as the T_CSI corresponding to the called number, the contracted SCP address, and the service list of the called user; , the corresponding T_CSI, contracted SCP address, service list of the called user and other information can be queried according to the called number, and the contracted SCP address is also the called home SCP address.

Step 304, the mobile gateway office judges the service key contained in the route acquisition response message and the call source of the call, and judges whether the service key is a VPMN service key and the call source is another network, and if so, then execute step 307, Otherwise, go to step 305 .

In step 305, the mobile gateway office sends a TC_INVOKE_REQ message to the called home SCP according to the address of the called home SCP, and triggers the call to the called home SCP for processing.

The TC_INVOKE_REQ message contains the business key.

Step 306, the mobile gateway office receives the TC_INVOKE_IND message fed back by the called home SCP.

After receiving the TC_INVOKE_REQ message, the called home SCP performs corresponding processing, and then feeds back the TC_INVOKE_IND message to the mobile gateway office. The performing corresponding processing is, for example, as follows: when the service key is a billing service key, the called home SCP performs corresponding payment processing.

In step 307, the mobile gateway office sends a routing information acquisition request including suppressed T_CSI to the called home HLR.

Step 308, the mobile gateway office receives the route acquisition response message fed back by the called home HLR, and the acquisition response message includes the roaming number of the called user.

Because the route information acquisition request contains suppressed T_CSI, the called home HLR no longer feeds back information such as T_CSI, subscribed SCP address, and called user's service list, but feeds back the called user's roaming number.

In step 309, the mobile gateway connects the called party according to the received roaming number of the called party.

After obtaining the roaming number of the called party, the mobile gateway office performs intra-network connection; at the same time, the mobile gateway office returns an ACM message to the calling gateway office.

Referring to Fig. 4, it is the system structural representation that VPMN calls of the present invention, and this system comprises mobile gateway office and called home HLR;

The mobile gateway office is used to receive a call request containing the calling and called number, and send the called number to the called home HLR; receive the service key fed back by the called home HLR, and determine whether the service key is a VPMN service key and the The call source of the call request is another network, if it is, then directly send the suppression T_CSI to the called home HLR; receive the called roaming number returned by the called home HLR, and connect to the called party;

The called home HLR is used to receive the called number sent by the mobile gateway, and feed back the service key to the mobile gateway according to the called number; receive the suppression T_CSI sent by the mobile gateway, and return the called roaming number to the mobile gateway.

Optionally, the mobile gateway office includes a call request receiving unit, a routing information obtaining unit, a judging unit and a call connecting unit;

The call request receiving unit receives the call request containing the calling and called numbers and sends it to the routing information obtaining unit;

The routing information acquisition unit receives the call request and sends the called number to the called home HLR;

The judging unit receives the service key fed back by the called home HLR, and judges whether the service key is a VPMN service key and the call source of the call request is another network, and if so, directly sends the suppression T_CSI to the called home HLR;

The call connecting unit receives the called roaming number returned by the called home HLR, and connects the called.

Optionally, when the judging unit receives the service key fed back by the called home HLR, it also receives the called home SCP address fed back by the called home HLR, and the system also includes the called home SCP;

The judging unit is further configured to send a TC_INVOKE_REQ message to the SCP corresponding to the called home SCP address when it is judged that the service key is a VPMN service key and the call source of the call request is another network, triggering SCP connection;

The call connection unit is also used to receive the TC_INVOKE_CNF message fed back by the called home SCP, and connect the called party;

The called home SCP is used to receive the TC_INVOKE_REQ message sent by the mobile gateway, and feed back the TC_INVOKE_CNF message to the mobile gateway after performing the T_CSI process.

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

Claims (10)

1. a method for virtual private mobile network VPMN calling, it is characterized in that, the method comprises: receiving a call request, the call request includes the calling and called numbers; Send the called number to the called home home location register HLR; Receive the service key fed back by the called home HLR, judge whether the service key is a VPMN service key and the call source of the call request is another network, and if so, directly send the suppression termination smart contract information T_CSI to the called home HLR ; Receive the called roaming number returned by the called home HLR, and connect the called party. 2. The method according to claim 1, characterized in that, while receiving the service key fed back by the called home HLR, also receiving the service control point SCP address fed back by the called home HLR; the method also includes: If it is determined that the service key is not satisfied that the service key is a VPMN service key and the call source of the call request is another network, then send a transaction processing capability application part layer request TC_INVOKE_REQ message to the SCP corresponding to the SCP address, and trigger the SCP connection. 3. The method according to claim 1, characterized in that, the called number sent to the called HLR is included in the routing information acquisition request. 4. The method according to claim 1, wherein the received service key fed back by the called home HLR is included in the route acquisition response message. 5. The method according to any one of claims 1 to 4, wherein the suppressed T_CSI is included in the routing information acquisition request. 6. A system for VPMN calls, characterized in that the system includes a mobile gateway office and a called home HLR; The mobile gateway office is used to receive a call request containing the calling and called number, and send the called number to the called home HLR; receive the service key fed back by the called home HLR, and determine whether the service key is a VPMN service key and the The call source of the call request is another network, if it is, then directly send the suppression T_CSI to the called home HLR; receive the called roaming number returned by the called home HLR, and connect to the called party; The called home HLR is used to receive the called number sent by the mobile gateway, and feed back the service key to the mobile gateway according to the called number; receive the suppression T_CSI sent by the mobile gateway, and return the called roaming number to the mobile gateway. 7. The system according to claim 6, wherein the mobile gateway office comprises a call request receiving unit, a routing information obtaining unit, a judging unit and a call connecting unit; The call request receiving unit receives the call request containing the calling and called numbers and sends it to the routing information obtaining unit; The routing information acquisition unit receives the call request and sends the called number to the called home HLR; The judging unit receives the service key fed back by the called home HLR, and judges whether the service key is a VPMN service key and the call source of the call request is another network, and if so, directly sends the suppression T_CSI to the called home HLR; The call connecting unit receives the called roaming number returned by the called home HLR, and connects the called. 8. The system according to claim 7, wherein when the judging unit receives the service key fed back by the called home HLR, it also receives the called home SCP address fed back by the called home HLR, and the system also includes the called home SCP address fed back by the called home HLR. Called attributable SCP; The judging unit is further configured to send a TC_INVOKE_REQ message to the SCP corresponding to the called home SCP address when it is judged that the service key is a VPMN service key and the call source of the call request is another network, triggering SCP connection; The call connection unit is also used to receive the TCAP layer request indication TC_INVOKE_CNF message fed back by the called home SCP, and connect the called party; The called home SCP is used to receive the TC_INVOKE_REQ message sent by the mobile gateway, and feed back the TC_INVOKE_CNF message to the mobile gateway after performing the T_CSI process. 9. A mobile gateway office, characterized in that the mobile gateway office includes a call request receiving unit, a routing information acquisition unit, a judging unit and a call connection unit; The call request receiving unit receives the call request containing the calling and called numbers and sends it to the routing information obtaining unit; The routing information acquisition unit receives the call request and sends the called number to the called home HLR; The judging unit receives the service key fed back by the called home HLR, and judges whether the service key is a VPMN service key and the call source of the call request is another network, and if so, directly sends the suppression T_CSI to the called home HLR; The call connecting unit receives the called roaming number returned by the called home HLR, and connects the called. 10. The mobile gateway office as claimed in claim 9, wherein, when the judgment unit receives the service key fed back by the called home HLR, it also receives the called home SCP address fed back by the called home HLR; The judging unit is further configured to send a TC_INVOKE_REQ message to the SCP corresponding to the called home SCP address when it is judged that the service key is a VPMN service key and the call source of the call request is another network, triggering SCP connection; The call connecting unit is also used to receive the TC_INVOKE_CNF message fed back by the called home SCP, and connect the called party.

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