CN108270908A - The based reminding method and device of a kind of missed call - Google Patents

Abstract

The invention discloses a kind of based reminding methods of missed call, receive the call message of this calling of callee side network replies, and the call message is in called inaccessible state for characterizing local call；It determines that called terminal is not turned on according to the call message, and determines that calling terminal has contracted missed call short message when reminding service, missed call reminding short message is generated with calling party's signing information and is sent to called terminal；The sender number of the missed call reminding short message is the number of calling terminal.The invention also discloses a kind of alarm sets of missed call.

Description

Method and device for reminding missed calls

technical field

The invention relates to the field of telecommunication networks, in particular to a reminding method and device for missed calls.

Background technique

With the development of mobile communication technology, the telecommunications network has gradually completed the transformation of IP (Internet Protocol, Internet Interconnection Protocol) and broadband, and has evolved towards the direction of intelligence; the establishment of IMS (IP Multimedia Subsystem, IP Multimedia Subsystem System) core network, which provides call services based on SIP (Session Initiation Protocol, Session Initiation Protocol), such as VoLTE (Voice Over LTE, voice service based on LTE; LTE, Long Term Evolution, long-term evolution), VoWIFI (Voice Over WIFI, WIFI-based voice services; WIFI, WirelessFidelity, wireless fidelity).

Like traditional voice services, in actual use of IMS-based audio and video services, the called terminal cannot be connected due to various reasons (such as shutdown, not in the service area, or busy line, etc.); in order to remind the called terminal afterwards For the user, the operator system will provide a missed call reminder service, that is, send a missed call reminder message to the called terminal afterwards. But the existing missed call reminder service has the following disadvantages: 1. The service is signed by the user of the called terminal. The called terminal sends a missed call reminder message, but it cannot be realized that when the contracted calling terminal fails to call the called terminal, it will send a missed call reminder to the called terminal; 2. The sender number of the missed call reminder message is a missed call Remind the service access code of the platform (such as 106xxxxxxx), which contains the number of the calling terminal and the call time. Since the number of the calling terminal is a string of numbers, it is difficult for the user to obtain the name of the calling user from the number of the calling terminal Waiting for information is not intuitive; 3. When the user of the called terminal wants to call back, he must copy the number from the missed call reminder message, and then dial, which is very troublesome; 4. The content of the missed call reminder message is too simple , there is no information such as the purpose of the incoming call, that is, there is no personalized setting for the text message content.

Therefore, it is an urgent problem to be solved to provide a missed call reminder short message which is convenient for the user of the called terminal to know the name of the incoming caller, easy to call back and rich in content.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a reminder method and device for missed calls, that is, to provide the user with a missed call that is convenient for the user of the called terminal to know the name of the incoming caller, easy to call back, and rich in content. Reminder SMS.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

An embodiment of the present invention provides a reminding method for missed calls, the method comprising:

Receiving a call response message of this call replied by the network on the called side, where the call response message is used to indicate that the local call is in a state that the called party is unreachable;

According to the call response message, it is determined that the called terminal cannot be connected, and when it is determined that the calling terminal has subscribed to the missed call SMS reminder service, a missed call reminder SMS is generated with the calling party's subscription information and sent to the called terminal; The sender number of the missed call reminder message is the number of the calling terminal.

In the above solution, the determining that the called terminal cannot be connected according to the call response message includes:

When the call response message contains an unreachable cause code, it is determined that the called terminal cannot be connected.

In the above solution, the determining that the called terminal cannot be connected according to the call response message includes:

When the call response message does not contain an unreachable reason code, the call establishment timer expires or a call cancel request sent by the calling terminal is received, it is determined that the called terminal cannot be connected.

In the above solution, the sending to the called terminal includes: sending the missed call reminder message to the called terminal when receiving permission from the calling terminal to send the missed call reminder message.

In the above solution, the determination that the calling terminal has signed up for the missed call SMS reminder service includes:

Obtain the calling party subscription information of the calling terminal in the local subscriber server HSS, and determine whether the calling terminal has subscribed to the missed call SMS reminder service according to the calling party subscription information.

In the above solution, the generating the missed call reminder message includes: generating the content of the missed call reminder message according to a preset template.

In the above solution, the sending to the called terminal includes: sending the missed call reminder message to the called terminal through a short message center.

An embodiment of the present invention provides a reminding device for a missed call, the device includes: a receiving module, configured to receive a call response message of this call replied by the network on the called side, and the call response message is used to represent a local call In the called unreachable state;

A processing module, configured to determine that the called terminal cannot be connected according to the call response message, and when it is determined that the calling terminal has subscribed to the missed call SMS reminder service, generate a missed call reminder SMS with the calling party's subscription information and send it to the called terminal calling terminal; the sender number of the missed call reminder message is the number of the calling terminal.

In the above solution, the processing module is specifically configured to: determine that the called terminal cannot be connected when the call response message contains an unreachable cause code.

In the above solution, the processing module is specifically configured to: when the call response message does not contain an unreachable cause code, the call setup timer expires or a call cancel request sent by the calling terminal is received, then determine that the called The calling terminal cannot be connected.

In the above solution, the processing module is specifically configured to: send the missed call reminder message to the called terminal when receiving permission from the calling terminal to send the missed call reminder message.

In the above solution, the processing module is specifically configured to: acquire the calling party subscription information of the calling terminal in the local user server HSS, and determine whether the calling terminal has subscribed to the missed call according to the calling party subscription information SMS reminder service.

In the above solution, the processing module is specifically configured to: generate the content of the missed call reminder message according to a preset template.

In the above solution, the processing module is specifically configured to: send the missed call reminder message to the called terminal through the message center.

The method and device for reminding missed calls provided by the embodiments of the present invention receive the call response message of this call replied by the network on the called side, and the call response message is used to indicate that the local call is in a state that the called party is unreachable; according to When the call response message determines that the called terminal cannot be connected, and it is determined that the calling terminal has subscribed to the missed call SMS reminder service, a missed call reminder SMS is generated with the calling party's subscription information and sent to the called terminal; The sender number of the incoming call reminder SMS is the number of the calling terminal. In this way, the user is provided with a missed call reminder short message that is convenient for the user of the called terminal to know the name of the incoming call user, easy to call back, and rich in content.

Description of drawings

Fig. 1 is the first kind of structural schematic diagram of the telephone network of the embodiment of the present invention;

FIG. 2 is a schematic diagram of the second composition structure of the telephone network according to the embodiment of the present invention;

FIG. 3 is a schematic diagram of the implementation flow of the reminder method for missed calls according to the embodiment of the present invention;

4 is a schematic diagram of the composition and structure of a reminder device for missed calls according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of the composition and structure of the first kind of reminding system not connected to electricity according to the embodiment of the present invention;

6 is a schematic diagram of the second composition structure of the reminder system not connected to electricity according to the embodiment of the present invention;

FIG. 7 is a schematic flow diagram of a specific realization of a method for reminding a missed call according to an embodiment of the present invention;

FIG. 8 is a first signaling flow chart of a missed call reminder method according to an embodiment of the present invention;

FIG. 9 is a second signaling flowchart of a missed call reminding method according to an embodiment of the present invention.

Detailed ways

In the embodiment of the present invention, the call response message of this call replied by the network on the called side is received, and the call response message is used to indicate that the local call is in the unreachable state of the called party; according to the call response message, it is determined that the called terminal cannot connected, and it is determined that the calling terminal has subscribed to the missed call reminder service, the calling party’s subscription information is used to generate a missed call reminder message and send it to the called terminal; the sender number of the missed call reminder message is mainly Call the terminal number.

The present invention will be described in further detail below in conjunction with the examples.

An embodiment of the present invention provides a method for reminding missed calls, as shown in FIG. 3 , the method includes:

Step 301: Receive the call response message of this call replied by the called side network, and the call response message is used to indicate that the local call is in a state that the called party is unreachable;

Here, in the IMS network system, the calling terminal will be connected to the calling IMS core network, and when the calling terminal calls the called terminal, the calling IMS core network will receive the call response message for this call; generally it can be divided into For the following situations:

1. As shown in Figure 1, both the calling terminal and the called terminal are connected to the IMS network system, that is, the calling terminal is connected to the calling IMS core network, the called terminal is connected to the called IMS core network, and the calling terminal is connected to the called IMS core network. The calling IMS core network is connected to the IMS core network of the called party; then a process for the calling terminal to call the called terminal is: the calling terminal sends a request to call the called terminal to the calling IMS core network; the calling IMS core network Send the request for calling the called terminal to the called IMS core network; the called IMS core network sends a call request to the called terminal, the called terminal rings, and the called IMS core network sends a call response to the calling IMS core network message; the calling IMS core network receives the call response message;

2. As shown in Figure 2, the calling terminal is connected to the calling IMS core network, the called terminal is connected to the CS (CircuitSwitched, circuit switched) network, and the calling IMS core network passes the MGCF (Media Gateway Control Function, media gateway control function ) is connected to the CS network; then a process for the calling terminal to call the called terminal is: the calling terminal sends a request to call the called terminal to the calling IMS core network; the calling IMS core network sends the call to the CS network through the MGCF Request from the called terminal; the CS network sends a call request to the called terminal, the called terminal rings, and the CS network sends a call response message to the calling IMS core network through the MGCF; the calling IMS core network receives the call response message.

Step 302: When it is determined that the called terminal cannot be connected according to the call response message, and it is determined that the calling terminal has subscribed to the missed call SMS reminder service, generate a missed call reminder SMS with the calling party's subscription information and send it to the called terminal ; The sender number of the missed call reminder message is the number of the calling terminal.

Here, when the calling terminal calls the called terminal, the calling IMS core network will always receive the call response message sent by the called IMS core network. Therefore, the status flag field can be set in the call response message. Different values of the flag field represent different states of the call (for example: as the called terminal is powered off, not in the service area, busy or ringing, etc.); Whether the calling terminal can be connected; and the user of the calling terminal also needs to pay the relevant fee to the operator, that is, sign up for the missed call SMS reminder service.

Here, a missed call reminder message can be sent to the called terminal by means of a third-party device (such as a short message center, etc.); The missed call reminder message cannot be sent to the called terminal until the called terminal is turned on or is in the service area.

The reminding method for missed calls provided by the embodiments of the present invention has the following advantages: (1) For all unconnected calls dialed out by the calling terminal, a missed call reminding message will be sent to the called terminal, which increases the number of missed calls. The probability that the calling terminal dials back this call also indirectly increases the probability that the calling terminal successfully calls; (2) for the user of the called terminal, the missed call reminder message is sent from the calling terminal, thereby Feel that you are valued by the user of the calling terminal, and when the user of the called terminal opens the inbox, you will directly see the user name corresponding to the number of the calling terminal, which is more intuitive and friendly; (3) in the prior art Among them, if the same effect is to be achieved, the user of the calling terminal needs to input a short message, which is troublesome, but in this method, the short message is automatically generated, which is relatively easy; (4) in this method, the calling terminal only needs to When signing up for the SMS reminder service for missed calls, one-time payment of relevant fees will be made, and there will be no cost after that, which can save the cost of the calling terminal user, especially when there are many calls.

In the embodiment of the present invention, the determining that the called terminal is unreachable according to the call response message includes: determining that the called terminal is unreachable when the call response message includes an unreachable reason code.

When the called terminal cannot be connected, it can be divided into the following two situations according to whether the called IMS core network or CS network plays the call to the calling terminal:

1. As shown in Figure 1, the called IMS core network provides audio playback. When the called terminal cannot be connected, the calling IMS core network will receive 183 session progress (183 Session Progress) sent by the called IMS core network As shown in Figure 2, when the called terminal cannot be connected, the CS network will return a call response to the calling IMS core network, which is converted into a call response message in the SIP protocol format by the MGCF. The call response message carries P-early-media (P early media) audio media resources, in which Q.850 carries unreachable reason code (that is, Reason value), for example: Reason value 20 means that the called party is not registered, 17 means that the called party Busy, 18 means the called party does not respond, 21 means the call is rejected, etc.; in this case, the Reason value is the unreachable reason code;

2. As shown in Figure 1, the called IMS core network does not provide announcements. When the called terminal cannot be connected, it will directly reply to the calling IMS core network with a call response message containing a response code; as shown in Figure 2, When the called terminal cannot be connected, the CS network will return a call response to the calling IMS core network, which will be converted into a call response message including a response code by the MGCF. For example, a response code of 480 indicates that the called terminal is unregistered, a response code of 408 indicates that the called terminal is temporarily unreachable, a response code of 603 indicates that the called terminal refuses to answer, etc.; in this case, response codes 480, 408 and 603 are unavailable up to reason code.

In this embodiment of the present invention, the determining that the called terminal is unreachable according to the call response message includes: when the call response message does not contain an unreachable cause code, the call establishment timer expires or the calling terminal receives If the cancel call request is sent, it is determined that the called terminal cannot be connected.

When the calling terminal is waiting for the called terminal to answer the call, if the user of the calling terminal presses the on-hook button, the call will be canceled, and the calling terminal will send a cancel call request to the calling IMS core network; generally, if If the preset time is exceeded and the called terminal has not answered the call, the call establishment timer will time out, that is, the called terminal cannot be connected.

In the embodiment of the present invention, the determining that the calling terminal has subscribed to the SMS reminder service for missed calls includes: obtaining the calling party subscription information of the calling terminal in the local user server HSS, and according to the calling party subscription information Determine whether the calling terminal has subscribed to the missed call SMS reminder service.

In the IMS network system, a local subscriber server HSS (Home Subscriber Server, local subscriber server) stores service subscription data of local subscribers. Here, the method stores the calling party's subscription information in the local user server HSS, which can make full use of the existing equipment, reduce the difficulty of design, and reduce the cost.

In the embodiment of the present invention, the generating the missed call reminder message includes: generating the content of the missed call reminder message according to a preset template.

Here, the user of the calling terminal can personalize the preset template. For example, grouping can be performed according to the number of the called terminal, and a copywriting template can be set for each group; furthermore, it can be set for each called terminal. A preset template and so on, so as to provide a variety of choices for the user of the calling terminal.

As an optional implementation, the generation of the missed call reminder message includes: obtaining the voice of the user from the calling terminal, converting the voice into corresponding text, and editing the text into the missed call Reminder message. In this way, users can be provided with a more diverse and personalized choice.

As an optional implementation, the content of the missed call reminder message includes the call time.

In the embodiment of the present invention, the sending to the called terminal includes: sending the missed call reminder message to the called terminal when receiving permission from the calling terminal to send the missed call reminder message.

Before sending the missed call reminder short message, it is necessary to obtain the permission of the user of the calling terminal, which is a kind of respect for the user of the calling terminal.

As an optional real-time solution, before sending the missed call reminder message, the content of the missed call reminder message can be played to the user of the calling terminal, and then the user can use voice or click a button to allow sending The missed call reminder message, at this time, when the calling IMS core network receives the permission message, it can send the missed call reminder message. During this process, if the user of the calling terminal reminds the content of the short message for the incoming call, he can reset it or choose not to send it.

In the embodiment of the present invention, the sending to the called terminal includes: sending the missed call reminder message to the called terminal through a short message center.

In the IMS network, the short message center is responsible for sending the short message to the destination terminal, which will continuously detect the state of the destination terminal, and send the short message to the destination terminal when the destination terminal can receive the short message. Here, the method sends the missed call reminder message to the called terminal through the message center, which can reduce the difficulty of design and reduce the cost.

An embodiment of the present invention provides a reminder device for missed calls, as shown in Figure 4, the device includes:

The receiving module 1 is configured to receive a call response message of this call replied by the called side network, and the call response message is used to indicate that the local call is in a state that the called party is unreachable;

Here, in the IMS network system, the calling terminal will be connected to the calling IMS core network, and when the calling terminal calls the called terminal, the calling IMS core network will receive the call response message for this call; generally it can be divided into For the following situations:

1. As shown in Figure 1, both the calling terminal and the called terminal are connected to the IMS network system, that is, the calling terminal is connected to the calling IMS core network, the called terminal is connected to the called IMS core network, and the calling terminal is connected to the called IMS core network. The calling IMS core network is connected to the IMS core network of the called party; then a process for the calling terminal to call the called terminal is: the calling terminal sends a request to call the called terminal to the calling IMS core network; the calling IMS core network Send the request for calling the called terminal to the called IMS core network; the called IMS core network sends a call request to the called terminal, the called terminal rings, and the called IMS core network sends a call response to the calling IMS core network message; the calling IMS core network receives the call response message;

2. As shown in Figure 2, the calling terminal is connected to the calling IMS core network, the called terminal is connected to the CS (CircuitSwitched, circuit switched) network, and the calling IMS core network passes the MGCF (Media Gateway Control Function, media gateway control function ) is connected to the CS network; then a process for the calling terminal to call the called terminal is: the calling terminal sends a request to call the called terminal to the calling IMS core network; the calling IMS core network sends the call to the CS network through the MGCF Request from the called terminal; the CS network sends a call request to the called terminal, the called terminal rings, and the CS network sends a call response message to the calling IMS core network through the MGCF; the calling IMS core network receives the call response message.

The processing module 2 is used to determine that the called terminal cannot be connected according to the call response message, and when it is determined that the calling terminal has subscribed to the missed call SMS reminder service, generate a missed call reminder SMS with the calling party's subscription information and send it to The called terminal; the sender number of the missed call reminder message is the number of the calling terminal.

Here, when the calling terminal calls the called terminal, the calling IMS core network will always receive the call response message sent by the called IMS core network. Therefore, the status flag field can be set in the call response message. Different values of the flag field represent different states of the call (for example: as the called terminal is powered off, not in the service area, busy or ringing, etc.); Whether the calling terminal can be connected; and the user of the calling terminal also needs to pay the relevant fee to the operator, that is, sign up for the missed call SMS reminder service.

Here, a missed call reminder message can be sent to the called terminal by means of a third-party device (such as a short message center, etc.); The missed call reminder message cannot be sent to the called terminal until the called terminal is turned on or is in the service area.

The reminding device for missed calls provided by the embodiments of the present invention has the following advantages: (1) For all unconnected calls dialed out by the calling terminal, a missed call reminder message will be sent to the called terminal, which increases the number of missed calls. The probability that the calling terminal dials back this call also indirectly increases the probability that the calling terminal successfully calls; (2) for the user of the called terminal, the missed call reminder message is sent from the calling terminal, thereby Feel that you are valued by the user of the calling terminal, and when the user of the called terminal opens the inbox, you will directly see the user name corresponding to the number of the calling terminal, which is more intuitive and friendly; (3) in the prior art Among them, if the same effect is to be achieved, the user of the calling terminal needs to input a short message, which is troublesome, but in this device, the short message is automatically generated, which is relatively easy; (4) in this device, the calling terminal only needs to When signing up for the SMS reminder service for missed calls, one-time payment of relevant fees will be made, and there will be no cost after that, which can save the cost of the calling terminal user, especially when there are many calls.

In the embodiment of the present invention, the processing module 2 is specifically configured to: determine that the called terminal cannot be connected when the call response message includes an unreachable reason code.

When the called terminal cannot be connected, it can be divided into the following two situations according to whether the called IMS core network or CS network plays the call to the calling terminal:

1. As shown in Figure 1, the called IMS core network provides audio playback. When the called terminal cannot be connected, the calling IMS core network will receive 183 session progress (183 Session Progress) sent by the called IMS core network As shown in Figure 2, when the called terminal cannot be connected, the CS network will return a call response to the calling IMS core network, which is converted into a call response message in the SIP protocol format by the MGCF. The call response message carries P-early-media (P early media) audio media resources, in which Q.850 carries unreachable reason code (that is, Reason value), for example: Reason value 20 means that the called party is not registered, 17 means that the called party Busy, 18 means the called party does not respond, 21 means the call is rejected, etc.; in this case, the Reason value is the unreachable reason code;

2. As shown in Figure 1, the called IMS core network does not provide announcements. When the called terminal cannot be connected, it will directly reply to the calling IMS core network with a call response message containing a response code; as shown in Figure 2, When the called terminal cannot be connected, the CS network will return a call response to the calling IMS core network, which will be converted into a call response message including a response code by the MGCF. For example, a response code of 480 indicates that the called terminal is unregistered, a response code of 408 indicates that the called terminal is temporarily unreachable, a response code of 603 indicates that the called terminal refuses to answer, etc.; in this case, response codes 480, 408 and 603 are unavailable up to reason code.

In the embodiment of the present invention, the processing module 2 is specifically configured to: when the call response message does not contain an unreachable reason code, the call establishment timer expires or the call cancel request sent by the calling terminal is received, then determine The called terminal cannot be connected.

When the calling terminal is waiting for the called terminal to answer the call, if the user of the calling terminal presses the on-hook button, the call will be canceled, and the calling terminal will send a cancel call request to the calling IMS core network; generally, if If the preset time is exceeded and the called terminal has not answered the call, the call establishment timer will time out, that is, the called terminal cannot be connected.

In the embodiment of the present invention, the processing module 2 is specifically configured to: obtain the calling party subscription information of the calling terminal in the local user server HSS, and determine whether the calling terminal has signed a contract according to the calling party subscription information Missed call SMS reminder service.

In the IMS network system, the local subscriber server HSS will store the calling party subscription information of the local subscriber. Here, the device stores the calling party's subscription information in the local user server HSS, which can make full use of the existing equipment, reduce the difficulty of design, and reduce the cost.

In the embodiment of the present invention, the processing module 2 is specifically configured to: generate the content of the missed call reminder message according to a preset template.

Here, the user of the calling terminal can personalize the preset template. For example, grouping can be performed according to the number of the called terminal, and a copywriting template can be set for each group; furthermore, it can be set for each called terminal. A preset template and so on, so as to provide a variety of choices for the user of the calling terminal.

As an optional implementation, the generation of the missed call reminder message includes: obtaining the voice of the user from the calling terminal, converting the voice into corresponding text, and editing the text into the missed call Reminder message. In this way, users can be provided with a more diversified and personalized choice

As an optional implementation, the content of the missed call reminder message includes the call time.

In the embodiment of the present invention, the processing module 2 is specifically configured to: send the missed call reminder message to the called terminal when receiving permission from the calling terminal to send the missed call reminder message.

Before sending the missed call reminder short message, it is necessary to obtain the permission of the user of the calling terminal, which is a kind of respect for the user of the calling terminal.

As an optional real-time solution, before sending the missed call reminder message, the content of the missed call reminder message can be played to the user of the calling terminal, and then the user can use voice or click a button to allow sending The missed call reminder message, at this time, when the calling IMS core network receives the permission message, it can send the missed call reminder message. During this process, if the user of the calling terminal reminds the content of the short message for the incoming call, he can reset it or choose not to send it.

In the embodiment of the present invention, the processing module 2 is specifically configured to: send the missed call reminder message to the called terminal through the message center.

In the IMS network, the short message center is responsible for sending the short message to the destination terminal, and it will continuously detect the state of the destination terminal, and when the destination terminal can receive the short message, it will send the short message to the destination terminal. Here, the device sends the missed call reminder message to the called terminal through the message center, which can reduce the difficulty of design and reduce the cost.

The embodiment of the present invention provides a kind of reminding system of not connected electricity, as shown in Fig. 5, Fig. 6, comprises the following modules:

1. The calling IMS core network is used to send the request from the calling terminal to call the called terminal to the CS network or the called IMS network, and receive the call response message from the CS network or the called IMS network; determine the called terminal according to the call response message. When the calling terminal cannot be connected, and it is determined that the calling terminal has subscribed to the missed call SMS reminder service, it will generate the request and parameters of the missed call reminder SMS (for example, the number of the calling terminal, the number of the called terminal, and the call time, etc. ) is sent to the short message generation device;

2. The CS network is used to call the called terminal according to the request from the calling IMS core network to call the called terminal; and send a call response message to the calling IMS core network through the MGCF;

3. The called IMS core network is used to send to the called terminal according to the request from the calling IMS core network to call the called terminal; and send a call response message to the calling IMS core network;

4. The short message generation device is used to generate a missed call reminder message according to the received request and parameters for generating a missed call reminder message, and simulate the calling terminal to send the missed call reminder message to the SMS center;

5. The short message center is used to send the missed call reminder short message to the called terminal, which will continuously detect the status of the called terminal, and when the called terminal can receive the short message, send the short message to the called terminal.

As shown in Figure 7, the working steps of this unconnected reminder system are:

Step 701: the calling terminal initiates a request to call the called terminal;

Step 702: The calling IMS core network receives the request for calling the called terminal, and sends the request for calling the called terminal to the called IMS core network or CS network;

Step 703: The called IMS core network or CS network will call the called terminal, and the called terminal rings. If the called terminal is connected, perform step 704; otherwise, perform step 705;

Step 704: The user of the called terminal answers the call and completes the call;

Step 705: The calling IMS core network receives the call response message;

Step 706: When the calling IMS core network determines that the call response message contains an unreachable reason code, it sends the request and parameters for generating a missed call reminder message to the message generating device, and then performs step 707; otherwise, performs step 711;

Step 707: The short message generation device analyzes the number of the calling terminal, the number of the called terminal, and the call time, etc., and then generates a missed call reminder text message with the pre-configured copy template; the sender number of the short message is the number of the calling terminal , the receiver number is the number of the called terminal, and its content includes the call time;

Step 708: After receiving the permission of the calling terminal user, the calling IMS core network notifies the short message generation device to send the missed call reminder message, and the short message generation device sends the missed call reminder message to the SMS center, that is, simulates the caller The terminal sends the missed call reminder message to the SMS center;

Step 709: The calling IMS core network sends a service notification tone to the calling terminal, and the calling terminal plays the service notification tone; the notification tone can be: because the called party is unreachable, the missed call is notified by short message;

Step 710: The calling IMS core network transparently transmits the call response message to the calling terminal, the calling terminal parses the call response message, and plays the answering status of the called terminal by voice;

Step 711: The user of the calling terminal may wait for the called terminal to connect until the call establishment timer expires; it is also possible that the user of the calling terminal presses the cancel button to cancel the call, and the calling IMS core network will receive The call cancellation request sent by the calling terminal; if any one of these two situations is established, the call fails, and the request and parameters for generating a missed call reminder message need to be sent to the message generating device;

Step 712: The short message generation device analyzes the number of the calling terminal, the number of the called terminal, the call time, etc., and then generates a missed call reminder text message with the pre-configured copy template; the sender number of the short message is the number of the calling terminal , the receiver number is the number of the called terminal, and its content includes the call time;

Step 713: The calling IMS core network notifies the short message generation device to send the missed call reminder message, and the short message generation device sends the missed call reminder message to the SMS center, that is, simulates the calling terminal to send the missed call reminder message to the SMS center ;

Here, the short message center will continuously detect the state of the called terminal, and if the called terminal can receive the short message, it will send the missed call reminder short message to the called terminal.

As shown in Figure 8, when the call response message contains unreachable reason codes, the signaling flow of the reminder system for missing calls includes:

Process 801: the calling terminal initiates an INVITE call request, and calls the called terminal;

Process 802: The INVITE call request is sent to the called terminal through the calling IMS core network and the called party's IMS core network; or sent to the CS network through the IMS core network, and the CS network calls the called terminal;

Process 803: The called IMS core network/CS network sends a call response message to the calling IMS core network because the called party is disconnected and cannot be connected, and the call response message includes an unreachable reason code;

Process 804: The calling IMS core network receives the call response message, and detects that the call response message contains an unreachable reason code; the calling IMS core network obtains the calling party subscription information of the calling terminal from the local subscriber server HSS, Determine whether the calling terminal has subscribed to the missed call SMS reminder service according to the calling party's subscription information;

Process 805: the calling IMS core network sends an INVITE request to the short message generation device, the INVITE request includes the number of the calling terminal, the number of the called terminal, and the calling time;

Process 806: The short message generation device parses out information such as calling party number, called party number and call time in the INVITE request, and then constructs a short message with a pre-configured copywriting template; the sender number of the short message is the number of the calling terminal, The receiving party number is the number of the called terminal, and its content includes the call time; for example: For example: I called you at XX: XX, XX, XX, XX, please call me back at your convenience;

Process 807: the short message generation device returns a 183 response to the calling IMS core network, carrying the service prompt tone address information;

Process 808: The IMS core network sends a 183 response to the calling terminal.

Process 809: According to the service notification tone address information, the calling terminal obtains and plays the service notification tone;

Process 810: The short message generation device sends a MO_FORWARD_SHORT_MESSAGE request to the short message center, that is, the short message generation device simulates the calling terminal, and sends the constructed missed call reminder short message to the short message center to which the calling terminal belongs.

Process 811: the short message center replies MO_FORWARD_SHORT_MESS AGE_ACK message to the short message generation device, that is, the short message center returns to the short message generation device a message for confirming submission of the missed call reminder short message;

Process 812: the short message center sends a MO_FORWARD_SHORT_MESSAGE message to the called terminal, that is, when the called terminal recovers the reachable state, the short message center sends a missed call reminder message to the called terminal. When the called terminal receives a missed call reminder message, it will display the missed call reminder message in the inbox. Since the sender of the missed call reminder message is the calling terminal, as long as the number of the calling terminal is stored in the address book of the called terminal, the name of the user of the calling terminal will be displayed in the inbox.

As shown in Figure 9, when the call response message does not include the unreachable reason code, the signaling process of the unconnected reminder system includes:

Process 901: the calling terminal initiates an INVITE call request, and calls the called terminal;

Process 902: The INVITE call request is sent to the called terminal through the calling IMS core network and the called party's IMS core network; or sent to the CS network through the IMS core network, and the CS network calls the called terminal;

Process 903: the called IMS core network or CS network sends a call response message to the calling IMS core network;

Process 904: The calling IMS core network receives the call response message, and detects that the call response message does not include an unreachable reason code;

Process 905: The calling IMS core network transparently transmits the call response message in SIP protocol format to the calling terminal, the calling terminal parses the call response message, and plays the answering status of the called terminal by voice;

Process 906: the user of the calling terminal presses the cancel button to cancel the call, and the calling IMS core network will receive the CANCLE cancellation request sent by the calling terminal;

Process 907: the calling IMS core network sends a CANCLE request to the called IMS core network/CS network, and the call ends;

Process 908: The calling IMS core network obtains the calling party subscription information of the calling terminal from the local subscriber server HSS, and determines whether the calling terminal has subscribed to the missed call SMS reminder service according to the calling party subscription information;

Process 909: the calling IMS core network sends an INVITE request to the SMS generating device, the INVITE request includes the number of the calling terminal, the number of the called terminal, and the calling time;

Process 910: The short message generation device parses out information such as the calling party number, called party number and call time in the INVITE request, and then constructs a short message with a pre-configured copywriting template; the sender number of the short message is the number of the calling terminal, The receiving party number is the number of the called terminal, and its content includes the call time; for example: For example: I called you at XX: XX, XX, XX, XX, please call me back at your convenience;

Process 911: the short message generation device returns a 183 response to the calling IMS core network, carrying the service prompt tone address information;

Process 912: the short message generation device sends a MO_FORWARD_SHORT_MESSAGE request to the short message center, that is, the short message generation device simulates the calling terminal, and sends the constructed missed call reminder short message to the short message center to which the calling terminal belongs.

Process 913: the short message center replies MO_FORWARD_SHORT_MESS AGE_ACK message to the short message generating device, that is, the short message center returns a confirmation message for submitting the missed call reminding short message to the short message generating device;

Process 914: the short message center sends a MO_FORWARD_SHORT_MESSAGE message to the called terminal, that is, when the called terminal recovers the reachable state, the short message center sends a missed call reminder message to the called terminal. When the called terminal receives a missed call reminder message, it will display the missed call reminder message in the inbox. Since the sender of the missed call reminder message is the calling terminal, as long as the number of the calling terminal is stored in the address book of the called terminal, the name of the user of the calling terminal will be displayed in the inbox.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (14)

1. A kind of reminding method of missed call, it is characterized in that, described method comprises: Receiving a call response message of this call replied by the network on the called side, where the call response message is used to indicate that the local call is in a state that the called party is unreachable; According to the call response message, it is determined that the called terminal cannot be connected, and when it is determined that the calling terminal has subscribed to the missed call SMS reminder service, a missed call reminder SMS is generated with the calling party's subscription information and sent to the called terminal; The sender number of the missed call reminder message is the number of the calling terminal. 2. The reminder method for missed calls according to claim 1, wherein said determining that the called terminal cannot be connected according to the call response message comprises: When the call response message contains an unreachable cause code, it is determined that the called terminal cannot be connected. 3. The reminder method for missed calls according to claim 1, wherein said determining that the called terminal cannot be connected according to the call response message comprises: When the call response message does not contain an unreachable reason code, the call establishment timer expires or a call cancel request sent by the calling terminal is received, it is determined that the called terminal cannot be connected. 4. The reminder method for missed calls according to claim 3, wherein the sending to the called terminal includes: When receiving permission from the calling terminal to send the missed call reminder message, send the missed call reminder message to the called terminal. 5. The reminding method for missed calls according to claim 1, wherein said determining that the calling terminal has signed a missed call SMS reminder service includes: Obtain the calling party subscription information of the calling terminal in the local subscriber server HSS, and determine whether the calling terminal has subscribed to the missed call SMS reminder service according to the calling party subscription information. 6. the reminding method of missed call according to claim 1, is characterized in that, described generating missed call reminding note, comprises: The content of the missed call reminder message is generated according to a preset template. 7. The reminder method for missed calls according to claim 1, wherein the sending to the called terminal includes: Send the missed call reminder message to the called terminal through the message center. 8. A reminder device for missed calls, characterized in that the device comprises: A receiving module, configured to receive a call response message for this call replied by the network on the called side, where the call response message is used to indicate that the local call is in a state that the called party is unreachable; A processing module, configured to determine that the called terminal cannot be connected according to the call response message, and when it is determined that the calling terminal has subscribed to the missed call SMS reminder service, generate a missed call reminder SMS with the calling party's subscription information and send it to the called terminal calling terminal; the sender number of the missed call reminder message is the number of the calling terminal. 9. The reminder device for missed calls according to claim 8, wherein the processing module is specifically used for: When the call response message contains an unreachable cause code, it is determined that the called terminal cannot be connected. 10. The reminder device for missed calls according to claim 7, wherein the processing module is specifically used for: When the call response message does not contain an unreachable reason code, the call establishment timer expires or a call cancel request sent by the calling terminal is received, it is determined that the called terminal cannot be connected. 11. The reminder method for missed calls according to claim 10, wherein the processing module is specifically used for: When receiving permission from the calling terminal to send the missed call reminder message, send the missed call reminder message to the called terminal. 12. The reminder device for missed calls according to claim 7, wherein the processing module is specifically used for: Obtain the calling party subscription information of the calling terminal in the local subscriber server HSS, and determine whether the calling terminal has subscribed to the missed call SMS reminder service according to the calling party subscription information. 13. The reminder device for missed calls according to claim 7, wherein the processing module is specifically used for: The content of the missed call reminder message is generated according to a preset template. 14. The reminder device for missed calls according to claim 7, wherein the processing module is specifically used for: Send the missed call reminder message to the called terminal through the message center.