CN100407737C - A reminder device for missed calls and its implementation method - Google Patents

Abstract

The present invention proposes a device and method for prompting missed calls. The device includes: a visitor location register, a home location register, and a short message center; the home location register detects whether the user is powered off, constructs a point-to-point short message and sends it to the short message center; The visitor location register detects whether the user responds, and constructs an SMDPP message to the generated missed call and sends it to the short message center; the short message center transmits the missed call request to the missed call prompt server and sends the missed call message; The call reminder server, as an external short message entity, exchanges information with the short message center, processes the missed call request message and constructs a missed call message, submits it to the short message center and sends it to the user. The present invention makes little modification to MSC/VLR/HLR, does not need to modify the short message center, only needs to add a missed call prompting server to realize the missed call prompting function, and it can be predicted that it will become one of the characteristic services attracting users.

Description

A reminder device for missed calls and its implementation method

technical field

The invention belongs to the field of mobile communication, and specifically relates to a device and a realization method for providing a reminder function in the form of a short message to a missed call generated in a mobile communication network.

Background technique

In the field of mobile communication, whether it is a GSM network or a CDMA network, there are voice services and short message services. In these two networks, when the calling party makes a call, the call cannot be connected temporarily because the called party is turned off, is in a signal blind area (no response to paging), or the user is talking, which inevitably leads to missed calls. For missed calls, the voice service network cannot promptly and accurately notify the called party when the called party is available. The main reason is that the voice service is a real-time service without functions such as waiting, retrying, and forwarding. The short message has the function of storing, forwarding and retrying, which can make up for the defect of the voice service. Therefore, if the missed call generated by the user is prompted in the form of a short message, it can solve the problem that the actual user has caused by the network or other reasons. In this way, the user will not miss some important calls due to missed calls, which can reduce the missed call rate and improve the connection rate in another form.

Relevant patent documents that solve the problem of missed calls in the form of short messages have not yet been retrieved.

Contents of the invention

The technical problem to be solved by the present invention is to realize a missed call prompting device and a missed call prompting method, which can give the user a prompt in the form of a short message when the user misses a call; Realize the missed call prompt function, which is simple to implement and convenient to network;

A device for prompting missed calls according to the present invention includes: a visitor location register, a home location register, and a short message center; the home location register is used to detect whether the user is turned off, and constructs point-to-point short message delivery, that is, SMDPP message transmission to the short message center; the visitor location register is used to detect whether the user is talking or paging is unresponsive, and the missed call structure SMDPP message that is generated is sent to the short message center; the short message center is responsible for sending The missed call request is transmitted to the missed call prompt server and the missed call message is issued; it is characterized in that: it also includes a missed call prompt server; the missed call prompt server exchanges information with the short message center as an external short message entity, and processes the missed call request message and construct a missed call message, submit it to the short message center and send it to the user.

A method for realizing a missed call prompt according to the present invention is characterized in that it comprises the following steps:

(1) For the missed call generated by the user's shutdown, the home location register constructs an SMDPP message and sends it to the short message center;

(2) short message center is by analyzing SMDPP message, according to the DeliverReq_Sm message of destination address construction SMPP standard, sends to missed call prompt server;

(3) The missed call prompt server receives the DeliverReq_Sm message and solves the missed call request data according to the Short_Message field, and obtains the calling address, the called address and the reason for the missed call;

(4) The missed call prompt server constructs a missed call prompt message and sends it to the short message center according to the missed call request data;

(5) The short message center stores the missed call prompt message, and sends the message to the user when the user is available and reachable.

The equipment and implementation method of the missed call prompt that the present invention proposes is very little to MSC/VLR/HLR, does not need to revise to the short message center, only needs to increase a missed call prompt server and can realize the missed call prompt function, to the operator It is a good choice. At present, the short message service has become an important business growth point of the operators. As a value-added service of the short message service, the missed call reminder can increase a new source of income for the operators. It is foreseeable that it will become one of the characteristic services that attract users.

Description of drawings

Fig. 1 is the network reference model that the present invention proposes;

Fig. 2 is the signaling flow chart when the present invention handles the missed call of shutting down;

Fig. 3 is a flow chart of implementing the missed call prompting server of the present invention.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

Figure 1 The networking diagram of the missed call notification. The connection between the entities is: between the mobile switching center/visitor location register MSC/VLR and the home location register HLR and the short message center SMSC, the No. 7 signaling connection is adopted, and the connection between the missed call prompt server and the short message center The SMPP protocol is used to connect. Owing to having only location home register HLR and visitor location register VLR to be able to detect the missed call of the user, so in this system, when the user generates the missed call, HLR or VLR construct point-to-point short message delivery, that is, the SMDPP message is sent to the short message center; the short message The center is responsible for converting the missed call request message of SMDPP into the DeliverReq of the SMPP protocol, and sends the message to the missed call prompt server through the SMPP link between the missed call prompt server and the short message center, and the missed call prompt server is the generator of the missed call message , by analyzing the missed call request data brought by the HLR/VLR, constructing a missed call prompt message and submitting it to the short message center, the storage and retry functions of the short message center can ensure that the missed call prompt message is sent to the called user.

Fig. 2 is a signaling flow chart of the shutdown missed call prompt. The detailed description is as follows:

●A-c users shut down and be called;

D is to send SMDPP message to SMSC when HLR detects that the called party is powered off, wherein the UserData part of SMS_BearerData includes parameters such as FailCallType (shutdown), CallingMDN, and CalledMDN. This point is the initiation point of the missed call request, and this flow chart is the missed call request initiated by the HLR. Similarly, when the user is busy or there is no response to the paging, the same message will be sent to the short message center in the VLR;

e is that SMSC converts the message into SMPP message DeliverReq and sends it to the missed call prompt server;

f is a missed call prompt server to return the missed call request response message DeliverAck; here the missed call prompt server processes the missed call request generated by HLR and VLR; h-i constructs a missed call prompt message for the missed call prompt and submits it to the short message center;

●From j to n is the process that the called user turns on the phone and the short message center receives the notification. After receiving the notification, the short message center will send the missed call prompt message waiting in the short message center to the user;

●The process of successfully sending the missed call prompt message to the user for the short message center from o-r;

●s-t is the process that the short message center gives the missed call reminder server a receipt. The missed call reminder server judges whether the missed call reminder message is sent successfully according to the receipt. If it is not successful, it submits it again; data, check whether there is any missing call information of the calling user in the database, and if so, construct a short message and submit it to the short message center.

Through the above process, the missed call prompt message can be successfully sent to the user.

Fig. 3 is a flow chart of realizing the function of the missed call reminder server, and this figure is a detailed description of the e-f process in the process of Fig. 2 .

Among them, Fig. 3(a) is the process of the missed call prompting server processing the missed call prompting request; Fig. 3(b) is the receipt processing part after the missed call prompting message is sent to the user.

The implementation process of the missed call prompt server will be described in detail below in conjunction with FIG. 3 .

When the missed call request message arrives at the missed call prompt server, the missed call prompt server first analyzes the missed call prompt data: the calling number, the called number and the reason for the missed call generation. Then store these data in the database, combine the existing data with the current data and take out a part of the calling number to form a missed call reminder message and send it to the user. Through this combination, the combination of the missed call reminder and the missing caller number can be realized. Call message packet sending function.

The receipt processing of the missed call prompt message in Fig. 3(b) is mainly for the user to confirm whether the user has received the missed call prompt message. If the user has received the missed call prompt message, delete the data of the submitted calling party number part in the user's database, and judge whether there is any calling number that has not been prompted; if there is, continue to construct the missed call prompt The message is sent to the short message center and sent to the user's mobile phone in the form of a short message.

The caller number merging and missed call message group sending functions in this system provide users with as much information as possible while reducing the amount of messages received by users.

Claims (7)

1. A kind of equipment of missed call prompt, comprising: visitor location register, home location register, short message center; Described home location register is used for detecting whether user shuts down, and structure point-to-point short message delivery is that SMDPP message is sent to short message Center; the VLR is used to detect whether the user is talking or paging without response, and constructs an SMDPP message to the generated missed call and sends it to the short message center; the short message center is responsible for the home location register Or the missed call request SMDPP message of visitor location register structure is sent to the missed call prompt server and the missed call message is sent; It is characterized in that: also includes the missed call prompt server; Described missed call prompt server is as external short message entity and short message The center exchanges information, processes the missed call request message and constructs a missed call message and submits it to the short message center for delivery to the user, wherein the SMDPP message and the missed call message include the calling number and the called number. 2. A kind of implementation method of missed call prompt, it is characterized in that, comprises the following steps: (1) For the missed call generated by the user's shutdown, the home location register constructs an SMDPP message and sends it to the short message center; (2) the short message center sends the message that meets the standard according to the purpose address construction to the missed call prompt server by analyzing the SMDPP message; (3) After the missed call prompt server receives the message that meets the standard, it solves the missed call request data according to the message field, and obtains the calling address, the called address and the reason for the missed call; (4) The missed call prompt server constructs a missed call prompt message and sends it to the short message center according to the missed call request data; (5) The short message center stores the missed call prompt message, and sends the message to the user when the user is available and reachable; Wherein, the SMDPP message and the missed call message include a calling number and a called number. 3. the implementation method of missed call prompt according to claim 2, is characterized in that, described home location register structure SMDPP message comprises: source subscriber field fills in calling number, and purpose subscriber field fills in missed call prompt server access number, In the user data part, fill in the parameters that need to be transmitted: calling user, called user and failure reason. 4. the implementation method of the missed call prompt according to claim 2 is characterized in that, in the described step (5), after the user is available and reachable, the message is sent to the user, and then the missed call prompt server sends a receipt ; 5 . The method for realizing missed call prompt according to claim 4 , further comprising: the missed call prompt server judges whether it is successful or not according to the receipt, and resends or deletes the message after success. 6 . 6. the implementation method of the missed call prompt according to claim 2, is characterized in that, in the described step (4), after the short message center receives the missed call prompt message, the short message center sends a receipt to the missed call prompt server . 7. the realization method of missed call prompt according to claim 2 is characterized in that, in described step (1), if the missed call that user is busy or paging does not respond to produce, then construct SMDPP message by visitor location register send to SMS center

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