CN1852462A - Method for realizing foreward turning of message - Google Patents

Abstract

The invention discloses a method for realizing short message forwarding, which comprises the following steps: A. setting a short message forwarding number on a service control point for a terminal that subscribes to a short message termination intelligent service; B. receiving a short message by a short message center message to judge whether the short message destination terminal is a short message terminal call intelligent service terminal, if so, then send the short message destination terminal identity to the service control point; C. the service control point according to the received short message destination terminal identity, Obtain the short message forwarding number corresponding to the short message destination terminal in the short message forwarding number saved by itself, and send the short message forwarding number to the short message center; D. the short message center receives the short message forwarding number to send the short message to the terminal corresponding to the short message forwarding number. With the invention, the user can use another number to receive the short message sent by other users to his original number, and the user uses the short message to communicate more flexibly and conveniently.

Description

A Method for Realizing Short Message Forwarding

technical field

The invention relates to the technical field of communication, in particular to a method for realizing short message forwarding.

Background technique

In the existing communication technology field, the short message service provides a convenient and quick communication method for the majority of users. Because the short message service is convenient and quick to realize people's communication and communication, and the cost is relatively low, so the short message service has developed rapidly in recent years and has become a very important communication service.

In the process of realizing the short message service, the reception of the short message is linked with a specific telephone number, that is, the short message sent to the number B can only be received by the communication terminal whose number is B.

As shown in FIG. 1 , FIG. 1 is a schematic diagram of a network structure for realizing short message sending and receiving in the prior art. The communication terminal with the number A is used as the sending terminal of the short message, referred to as terminal A for short, the mobile switching center (MSC) where terminal A is located is MSC-A, and the short message center (SMC) to which terminal A belongs is SMC-A. The home location register (HLR) to which A belongs is HLR-A; the communication terminal whose number is B is used as the receiving terminal of the short message, referred to as terminal B, the MSC where terminal B is located is MSC-B, and the SMC to which terminal B belongs is SMC -B, the HLR to which terminal B belongs is HLR-B.

As shown in Figure 2, Figure 2 is a flow chart of a method for realizing short message sending and receiving in the prior art, and the method includes the following steps:

Step 201: Terminal A sends a short message to SMC-A through MSC-A;

Step 202: SMC-A sends the short message to SMC-B according to the number of terminal B;

Step 203: SMC-B interacts with HLR-B to obtain the current MSC number of terminal B. If terminal B is in an inaccessible state such as powering off or leaving the service area, SMC-B will not be able to obtain the current MSC number of terminal B. MSC number, at this time, SMC-B will buffer the short message until it obtains the current MSC number of terminal B, and then sends the short message to MSC-B according to the obtained MSC number of terminal B;

Step 204: MSC-B sends the short message to terminal B, and terminal B receives the short message sent by terminal A.

In the above-mentioned step 203, if the short message is cached in SMC-B after exceeding the time preset by the operator, SMC-B will automatically delete this short message to ensure that SMC-B has enough storage space, In this way, terminal B will never be able to receive the short message.

In real life, users often have the situation of temporarily switching to other numbers. For example, when the user is on a business trip, in order to save communication costs, the user may temporarily use a local number. In this case, if the user's original number is turned off or out of the service area, the user will not be able to receive the short messages sent to his original number, and these short messages will be temporarily cached in the short message center to which the user's original number belongs .

Simultaneously, in order to ensure that the storage space of the short message center is in a normally available range, the short message center needs to optimize the storage space of itself on a regular basis, and delete short messages that have been cached for a long time and cannot be sent out. In this way, the user may never be able to receive part of the short messages sent to his original number after changing the number, resulting in serious consequences of short message loss in the short message communication process.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method for realizing short message forwarding, so that the user can use another number to receive the short message sent by other users to his original number.

In order to achieve the above object, the present invention provides a method for realizing short message forwarding, the key lies in at least including the following steps:

A. On the service control point, set the short message forwarding number for the terminal that subscribes to the short message end call smart service;

B, the short message center receives the short message, judges whether the short message destination terminal is a short message terminal call intelligent service terminal, if so, then sends the short message destination terminal identity to the service control point;

C. The service control point obtains the short message forwarding number corresponding to the short message destination terminal from the short message forwarding number saved by itself according to the received short message destination terminal identity, and sends the short message forwarding number to short message center;

D. The short message center receives the short message forwarding number, and sends the short message to the terminal corresponding to the short message forwarding number.

In the above scheme, when the short message forwarding type of the short message destination terminal is unconditional forwarding, between step B and step C further includes:

B1, the service control point judges the short message forwarding type of the short message destination terminal according to the received short message destination terminal identity;

B2. The service control point determines that the short message forwarding type of the short message destination terminal is unconditional forwarding, and executes step C.

In the above scheme, when the short message forwarding type of the short message destination terminal is conditional forwarding, between step B and step C further includes:

B1, the service control point judges the short message forwarding type of the short message destination terminal according to the received short message destination terminal identity;

B2. The service control point determines that the short message forwarding type of the short message destination terminal is conditional forwarding, and sends an indication to the short message center when the short message terminal fails;

B3. The short message center sends the short message forwarding condition to the service control point according to the instruction when the short message terminal fails;

B4. The service control point judges whether the received short message forwarding condition is consistent with the set short message forwarding condition, and if so, executes step C.

In the above solution, the determination in step B whether the destination terminal of the short message is a short message terminal call intelligent service terminal is determined according to whether the short message center stores the short message terminal call intelligent service identifier.

In the above solution, the step of sending the short message destination terminal ID to the service control point in step B is realized by sending a short message analysis calling message carrying the short message destination terminal ID.

In the above solution, the step of sending the short message forwarding number to the short message center in step C is realized by the service control point sending the short message analysis call response message carrying the short message forwarding number.

In the above solution, the step D includes: the short message center receives the short message forwarding number, and sends the short message to the short message center corresponding to the short message forwarding number, and the terminal corresponding to the short message forwarding number belongs to the short message center. The short message center sends the short message to the terminal corresponding to the short message forwarding number through the serving mobile switching center.

In the above solution, the terminal identity is a mobile station identity, an International Mobile Subscriber Identity or an electronic serial number.

Therefore, this method for realizing short message forwarding provided by the present invention, by setting the short message forwarding number for the terminal of the contracted short message termination smart service on the service control point (SCP), after the SMC receives the short message, Judging whether the short message destination terminal is a short message terminal call intelligent service terminal, if so, obtaining the short message forwarding number corresponding to the short message destination terminal from the SCP, and according to the short message forwarding number obtained, the short message Send to the terminal corresponding to the SMS forwarding number.

Utilize the present invention, because SMC can acquire the short message forwarding number corresponding to the short message destination terminal from the SCP after receiving the short message and judging that the short message destination terminal is the short message destination terminal, and according to the obtained The short message forwarding number sends the short message to the terminal corresponding to the short message forwarding number, so the user can use another number to receive the short message sent by other users to his original number. In addition, the technical scheme provided by the invention will make the existing short message service more perfect, and the user's communication by using the short message will be more flexible and convenient. At the same time, after the short messages are forwarded, the short messages cached by the SMC will be reduced, and the reduction of the short messages cached by the SMC will also be very beneficial to improve the quality of the communication network, thereby alleviating short message congestion.

In addition, the present invention also provides a new service function, the operator can charge a corresponding fee when implementing short message forwarding, and provides a new profit growth point for the short message service.

Description of drawings

Fig. 1 is a schematic diagram of a network structure realizing short message sending and receiving in the prior art;

Fig. 2 is the flow chart of the method for realizing short message sending and receiving in the prior art;

Fig. 3 is the method flowchart of the present invention realizing short message forwarding overall technical solution;

Fig. 4 is the signaling flow chart realizing short message forwarding in the first embodiment of the present invention;

Fig. 5 is a signaling flowchart for implementing short message forwarding in the second embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the following examples are given and the present invention is further described in detail with reference to the accompanying drawings.

The core content of the present invention is: by setting the short message forwarding number on the SCP for the terminal that subscribes to the short message terminal smart service, after receiving the short message, the SMC judges whether the short message destination terminal is a short message terminal smart service terminal , if yes, obtaining the short message forwarding number corresponding to the short message destination terminal from the SCP, and sending the short message to the terminal corresponding to the short message forwarding number according to the obtained short message forwarding number.

As shown in Figure 3, Figure 3 is a flow chart of the method for realizing the short message forwarding overall technical solution of the present invention, at least including the following steps:

Step 301: Set a short message forwarding number on the SCP for a terminal that subscribes to the short message end call smart service;

Step 302: The SMC receives the short message, and judges whether the destination terminal of the short message is an intelligent service terminal for short message termination, and if so, executes step 303; otherwise, ends the process;

Step 303: the SMC sends the short message destination terminal identity to the SCP;

Step 304: According to the received short message destination terminal identity, the SCP obtains the short message forwarding number corresponding to the short message destination terminal from the short message forwarding number saved by itself, and sends the short message forwarding number to the SMC ;

Step 305: The SMC receives the short message forwarding number, and sends the short message to the terminal corresponding to the short message forwarding number.

When setting the short message forwarding number in the above step 301, the user's current number is generally set as the short message forwarding number on the SCP, so that the user can use the current number to receive short messages sent to his original number by other users.

When a terminal subscribes to the short message end call smart service on the home SMC, it will set the smart service identifier corresponding to the terminal in the database of the terminal home SMC, and set the trigger address that triggers the short message end call smart service, that is, the SCP address, the SMC can trigger the corresponding SCP to execute the short message termination intelligent service according to the trigger address.

In the above-mentioned step 302, after the SMC receives the short message, it judges whether the destination terminal of the short message is a short message terminal intelligent service terminal according to the destination terminal identity mark of the short message, and if so, then according to the trigger short message stored in its own database, The SCP address of the terminal call intelligent service sends the short message destination terminal identity to the corresponding SCP, triggering the SCP to execute the short message terminal call intelligent service. Generally, the terminal identity can be a mobile station identity (MSID), an international mobile subscriber identity (IMSI), or an electronic serial number (ESN).

In above-mentioned step 304, after receiving the short message destination terminal identity mark that SMC sends, SCP judges short message forwarding type according to short message purpose terminal identity mark, if short message forwarding type is unconditional forwarding, then SCP directly according to The identity of the short message destination terminal is used to obtain the short message forwarding number corresponding to the short message destination terminal from the short message forwarding number saved by itself.

If the short message forwarding type is conditional forwarding, the SCP sends the trigger information to the SMC that is triggered to the SCP itself when the short message fails to terminate the call, and the SMC triggers the corresponding message according to the trigger information when the short message fails to terminate the call. The trigger of the short message forwarding condition is sent to the SCP, and the SCP judges whether the received short message forwarding condition is consistent with the set short message forwarding condition. The short message forwarding number corresponding to the short message destination terminal is obtained from the short message forwarding number.

The above short message forwarding type is set on the SCP, and the short message forwarding type can be set as unconditional forwarding or conditional forwarding.

When the short message forwarding type is unconditional forwarding, no matter what state the terminal is in, even if it is in the normal communication state, as long as other terminals send short messages to the terminal, the SMC belonging to the terminal triggers the SCP to execute short message forwarding, and the SCP judges The short message forwarding type of the terminal is unconditional forwarding, and the SCP sends the short message forwarding number to the SMC.

When the short message forwarding type is conditional forwarding, the short message forwarding may be forwarding based on the short message termination failure, or based on the cause of the short message termination failure.

For forwarding based on short message termination failure, no matter what causes the short message termination failure, after the terminal’s home SMC triggers the SCP to perform short message forwarding, the SCP judges that the terminal’s short message forwarding type is based on short message termination If the call forwarding fails, and the received short message forwarding condition is consistent with the set short message forwarding condition, it means that the short message terminal call fails, and the SCP sends the short message forwarding number to the SMC.

For forwarding based on the cause of short message termination failure, after the terminal's home SMC triggers the SCP to execute short message forwarding, the SCP judges that the terminal's short message forwarding type is forwarding based on the cause of short message termination failure, and the received short message The forwarding condition is consistent with the set short message forwarding condition, that is, the reason why the SMC fails to send the short message to the terminal is the same as the set short message sending failure reason, and the SCP sends the short message forwarding number to the SMC.

In order to realize short message forwarding, for both conditional forwarding and unconditional forwarding, it is necessary to add the parameter TerminationList for saving the short message forwarding number and the parameter for carrying the forwarding indicator in the short message analysis call response (sm_anlyzd) message The parameter DMH_Redirection Indicator. And, for conditional forwarding, also need to increase the parameter SMS_Cause Code that is used to carry short message transmission failure information or short message transmission failure reason in short message analysis calling (SM_ANLYZD) message.

In order to describe the method for implementing short message forwarding provided by the present invention in detail, two specific embodiments will be combined below, and this will be described in detail with reference to the accompanying drawings.

As shown in FIG. 4 , FIG. 4 is a signaling flowchart for implementing short message forwarding in the first embodiment of the present invention. In this embodiment, set the short message forwarding number for terminal B on the SCP in advance, set the user's current number as the short message forwarding number of terminal B, and set the short message forwarding type of terminal B on the SCP as Unconditional forwarding, terminal C is the terminal corresponding to the short message forwarding number, and the number of terminal C is the current number of the user. The method includes the following steps:

Step 401: The short message sending entity (SME-A) sends a short message termination request (SMDPP) message to the home short message center (SMC-B) of terminal B, and the SMDPP message carries the short message sent by SME-A to terminal B. message and the identity of terminal B.

Step 402: After receiving the SMDPP message sent by SME-A, SMC-B judges whether terminal B is a short message termination smart service according to the identity of terminal B contained in the SMDPP message and the smart service identifier stored in its own database The terminal, if yes, sends an SM_ANLYZD message to the corresponding SCP according to the SCP address of the triggering short message termination smart service saved in its own database, triggering the smart service signed by terminal B; otherwise, end this process; in the SM_ANLYZD message, at least It carries the identity of terminal B.

Step 403: After receiving the SM_ANLYZD message, the SCP judges the short message forwarding type according to the identity of terminal B carried in the SM_ANLYZD message, and finds that the short message forwarding type of terminal B is unconditional forwarding, then sends a message carrying The sm_anlyzd message of the short message forwarding number and the forwarding indicator;

Here, the short message forwarding number is the current number of the user, that is, the number of terminal C; the short message forwarding number is carried in the parameter Termination List of the sm_anlyzd message, and the forwarding indicator is carried in the parameter DMH_Redirection Indicator of the sm_anlyzd message.

Step 404: After receiving the sm_anlyzd message sent by the SCP, SMC-B updates the short message destination address to the number of terminal C, and returns a short message termination request response (smdpp) message to SME-A, indicating that SME-A sends The short message SMC-B for terminal B has been received.

Step 405: SMC-B sends an SMDPP message to the home short message center (SMC-C) of terminal C according to the forwarding indicator and the number of terminal C, and the SMDPP message carries at least the short message sent to terminal C and the terminal C's Number.

Step 406: After receiving the SMDPP message, SMC-C returns a smdpp message to SMC-B, indicating that SMC-B has received the short message sent to terminal C by SMC-C.

Step 407: SMC-C sends a short message routing request (SMREQ) message to terminal C's home HLR, requesting terminal C's short message routing address.

Step 408: After receiving the SMREQ message, the home HLR of terminal C returns the short message routing address of terminal C in the SMSADDR parameter of the short message routing request response (smreq) message to SMC-C.

Step 409: SMC-C sends an SMDPP message to the serving MSC of terminal C according to the short message routing address of terminal C in the SMSADDR parameter, and the SMDPP message carries the short message sent to terminal C and the number of terminal C.

Step 410: After receiving the SMDPP message, the serving MSC of terminal C sends the short message sent to terminal C to terminal C in a short message sending request (SMD-REQ) message.

Step 411: Terminal C receives the short message, and returns a short message sending request response (SMD-ACK) message to the serving MSC of terminal C, indicating that terminal C has successfully received the short message to the serving MSC of terminal C.

Step 412: The serving MSC of terminal C returns a smdpp message to SMC-C, indicating that SMC-C has successfully sent the short message to terminal C.

In this way, when the short message forwarding type of terminal B is unconditional forwarding, terminal C can successfully receive the short message sent by SME-A to terminal B, and the short message is forwarded successfully.

As shown in FIG. 5 , FIG. 5 is a signaling flowchart for implementing short message forwarding in the second embodiment of the present invention. In this embodiment, set the short message forwarding number for terminal B on the SCP in advance, set the user's current number as the short message forwarding number of terminal B, and set the short message forwarding type of terminal B on the SCP as Based on the forwarding of short message terminal call failure, terminal C is the terminal corresponding to the short message forwarding number, and the number of terminal C is the current number of the user. The method includes the following steps:

Step 501: SME-A sends an SMDPP message to SMC-B, and the SMDPP message carries the short message sent by SME-A to terminal B and the identity of terminal B.

Step 502: After receiving the SMDPP message sent by SME-A, SMC-B judges whether terminal B is a short message termination smart service according to the identity of terminal B contained in the SMDPP message and the smart service identifier stored in its own database The terminal, if yes, sends an SM_ANLYZD message to the corresponding SCP according to the SCP address of the triggering short message termination smart service saved in its own database, triggering the smart service signed by terminal B; otherwise, end this process; in the SM_ANLYZD message, at least It carries the identity of terminal B.

Step 503: After receiving the SM_ANLYZD message, the SCP judges the short message forwarding type according to the identity of terminal B carried in the SM_ANLYZD message, and finds that the short message forwarding type of terminal B is forwarding based on short message termination failure. The SMC-B returns a sm_anlyzd message, and the sm_anlyzd message carries an indication when the short message call termination fails, and the SMC-B can trigger the SCP according to the indication.

Step 504: After receiving the sm_anlyzd message sent by the SCP, SMC-B returns a smdpp message to SME-A, indicating that SMC-B has received the short message sent by SME-A to terminal B.

Step 505: SMC-B sends an SMREQ message to terminal B's home HLR, requesting terminal B's short message routing address.

Step 506: After receiving the SMREQ message, the home HLR of terminal B searches for the short message routing address of terminal B, but due to various reasons such as terminal B not in the service area, power off or network failure, the home HLR cannot find the short message routing address of terminal B address, the smreq message will be returned to SMC-B, indicating that the HLR to which terminal B belongs to SMC-B cannot find the short message routing address of terminal B.

Step 507: After SMC-B receives the smreq message, it finds that the short message routing address of terminal B cannot be found, and the short message termination call to terminal B fails, then according to the end-of-short message carried in the sm_anlyzd message received in step 503 Instruction when the call fails, send an SM_ANLYZD message to the SCP to request the forwarding number of the short message; the parameter SMS_Cause Code of the SM_ANLYZD message carries the information that the SMC-B failed to terminate the short message to the terminal B.

Step 508: After the SCP receives the SM_ANLYZD message, it judges whether the received short message forwarding condition is consistent with the set short message forwarding condition, that is, judges whether the SM_ANLYZD message carries information that SMC-B fails to terminate the short message to terminal B, If yes, then send to SMC-B the sm_anlyzd message that carries the short message forwarding number and the forwarding indicator; otherwise, end this process;

Here, the short message forwarding number is the current number of the user, that is, the number of terminal C; the short message forwarding number is carried in the parameter Termination List of the sm_anlyzd message, and the forwarding indicator is carried in the parameter DMH_Redirection Indicator of the sm_anlyzd message.

Step 509: After receiving the sm_anlyzd message sent by the SCP, SMC-B sends an SMDPP message to SMC-C according to the forwarding indicator and the number of terminal C, and the SMDPP message carries at least the short message sent to terminal C and the terminal C's number.

Step 510: After receiving the SMDPP message, SMC-C returns a smdpp message to SMC-B, indicating that SMC-B has received the short message sent to terminal C by SMC-C.

Step 511: SMC-C sends an SMREQ message to terminal C's home HLR, requesting terminal C's short message routing address.

Step 512: After receiving the SMREQ message, the home HLR of terminal C returns the short message routing address of terminal C in the SMSADDR parameter of the smreq message to SMC-C.

Step 513: SMC-C sends an SMDPP message to the serving MSC of terminal C according to the short message routing address of terminal C in the SMSADDR parameter, and the SMDPP message carries the short message sent to terminal C and the number of terminal C.

Step 514: After receiving the SMDPP message, the serving MSC of terminal C carries the short message sent to terminal C in the SMD-REQ message and sends it to terminal C.

Step 515: Terminal C receives the short message, and returns an SMD-ACK message to the serving MSC of terminal C, indicating that the serving MSC of terminal C has successfully received the short message.

Step 516: The serving MSC of terminal C returns a smdpp message to SMC-C, indicating that SMC-C has successfully sent the short message to terminal C.

In this way, when the short message forwarding type of terminal B is forwarding based on short message termination failure, terminal C can successfully receive the short message sent from SME-A to terminal B, and the short message forwarding is successful.

In the second embodiment of the present invention, the short message forwarding type of terminal B is set on the SCP as forwarding based on short message termination failure. In practical applications, the short message forwarding type of terminal B can also be set on the SCP to be forwarded based on the cause of short message termination failure.

In this case, the signaling process for realizing short message forwarding is consistent with the signaling process in the second embodiment of the present invention, and the content carried by some signaling and the content judged by the SCP are different. The advantage is that:

In step 507, the parameter SMS_CauseCode of the SM_ANLYZD message sent by SMC-B to the SCP carries the reason why SMC-B failed to terminate the short message to terminal B, such as not in the service area, shutting down or failure of the communication network, etc.

In step 508, when the SCP judges whether the received short message forwarding condition is consistent with the set short message forwarding condition, it judges whether the reason why the SMC-B fails to terminate the short message of terminal B is consistent with the set reason: If the reason why SMC-B fails to terminate the short message to terminal B is that the user is not in the service area, the set reason is also that the user is not in the service area, and the reason why SMC-B fails to terminate the short message to terminal B is the same as the set reason. SCP sends to SMC-B the sm_anlyzd message carrying the short message forwarding number and forwarding indicator; if SMC-B fails to terminate the short message to terminal B, the reason is that the user is not in the service area, and the set reason is that the user is turned off , the reason why SMC-B fails to terminate the short message call to terminal B is inconsistent with the set reason, and the SCP sends to SMC-B a sm_anlyzd message that does not carry the short message forwarding number and the forwarding indicator.

As can be seen from the above embodiments, this method for realizing short message forwarding provided by the present invention, by setting the short message forwarding number on the SCP for the terminal that subscribes to the short message terminal call intelligent service, the SMC receives the short message Afterwards, judge whether the short message destination terminal is a short message terminal call intelligent service terminal, if yes, then obtain the short message forwarding number corresponding to the short message destination terminal from the SCP, and according to the short message forwarding number obtained, send The short message is sent to the terminal corresponding to the short message forwarding number.

Utilize the present invention, because SMC can acquire the short message forwarding number corresponding to the short message destination terminal from the SCP after receiving the short message and judging that the short message destination terminal is the short message destination terminal, and according to the obtained The short message forwarding number sends the short message to the terminal corresponding to the short message forwarding number, so the user can use another number to receive the short message sent by other users to his original number. In addition, the technical scheme provided by the invention will make the existing short message service more perfect, and the user's communication by using the short message will be more flexible and convenient. At the same time, after the short messages are forwarded, the short messages cached by the SMC will be reduced, and the reduction of the short messages cached by the SMC will also be very beneficial to improve the quality of the communication network, thereby alleviating short message congestion.

In addition, the present invention also provides a new service function, the operator can charge a corresponding fee when implementing short message forwarding, and provides a new profit growth point for the short message service.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific 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 within the protection scope of the present invention.

Claims (8)

1, a kind of method that realizes Short Message Service Call forwarding is characterized in that, may further comprise the steps at least:

A, the terminal for signatory SMS terminal call IN service on service control point are provided with the Short Message Service Call forwarding number;

B, short message service center receive short message, judge whether short message purpose terminal is SMS terminal call IN service terminal, if then short message purpose terminal identity sign is sent to service control point;

C, service control point obtain the Short Message Service Call forwarding number corresponding with short message purpose terminal, and the Short Message Service Call forwarding number are handed down to short message service center according to the short message purpose terminal identity sign that receives in the Short Message Service Call forwarding number of self preserving;

D, short message service center receive the Short Message Service Call forwarding number, and short message is sent to the terminal corresponding with the Short Message Service Call forwarding number.

2, method according to claim 1 is characterized in that, when the Short Message Service Call forwarding type of short message purpose terminal is Call Forwarding Unconditional, further comprises between step B and the step C:

B1, service control point are judged the Short Message Service Call forwarding type of short message purpose terminal according to the short message purpose terminal identity sign that receives;

The Short Message Service Call forwarding type that B2, service control point are judged short message purpose terminal is a Call Forwarding Unconditional, execution in step C.

3, method according to claim 1 is characterized in that, when the Short Message Service Call forwarding type of short message purpose terminal is conditional forwarding, further comprises between step B and the step C:

B1, service control point are judged the Short Message Service Call forwarding type of short message purpose terminal according to the short message purpose terminal identity sign that receives;

The Short Message Service Call forwarding type that B2, service control point are judged short message purpose terminal is a conditional forwarding, issues indication when SMS terminal call is failed to short message service center;

When B3, short message service center fail at SMS terminal call, the Short Message Service Call forwarding condition is sent to service control point according to described indication;

B4, service control point judge whether the Short Message Service Call forwarding condition that receives is consistent with the Short Message Service Call forwarding condition of setting, if, execution in step C then.

4, method according to claim 1 is characterized in that, whether the short message purpose terminal of judging described in the step B is SMS terminal call IN service terminal, whether preserves SMS terminal call IN service sign according to short message service center and determines.

5, method according to claim 1, it is characterized in that, the step that short message purpose terminal identity sign is sent to service control point described in the step B is to analyze message call by the short message that transmission carries short message purpose terminal identity sign to realize.

6, method according to claim 1, it is characterized in that, the step that the Short Message Service Call forwarding number is handed down to short message service center described in the step C is that service control point calls the response message realization by the short message analysis that transmission carries the Short Message Service Call forwarding number.

7, method according to claim 1 is characterized in that, described step D comprises:

Short message service center receives the Short Message Service Call forwarding number, short message is sent to the short message service center that belongs to Short Message Service Call forwarding number counterpart terminal, by serving mobile switching center short message is sent to the terminal corresponding with the Short Message Service Call forwarding number with the short message service center of Short Message Service Call forwarding number counterpart terminal ownership.

8, method according to claim 1 is characterized in that, described terminal identity is designated mobile station identification, international mobile subscriber identifier or Electronic Serial Number.

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