CN1878337A - Method and system for realizing call waiting service - Google Patents

Abstract

The invention discloses a method and a system for realizing call waiting service. The method provided by the invention includes: A. The mobile switching center sends a message including the call waiting state flag to the first terminal through the base station subsystem; B. The first terminal confirms the call waiting state according to the call waiting state flag in the message. Through this method, during the call waiting process, the terminal can accurately know the state of the call waiting, and thereby further solves the problem that the user may be prompted with wrong relevant information in the existing call waiting process.

Description

Method and system for realizing call waiting service

technical field

The invention relates to the field of mobile communication, in particular to a method and system for realizing call waiting service.

Background technique

Call waiting is a supplementary service in mobile communication systems. When the user is talking, if another user calls the user, the user can choose to hold or answer the second call through the call waiting service, and can also switch between the two calls.

In the existing call waiting processing mechanism, if the first terminal and the second terminal are talking, when the third terminal calls the first terminal, the MSC (Mobile Switch Center, Mobile Switching Center) sends the call to the first terminal at a certain time interval. The terminal sends an information message to notify the first terminal that another call is waiting. If the first terminal answers the call or the third terminal hangs up before the first terminal answers, the MSC stops sending the information message to the first terminal.

The above-mentioned call waiting processing mechanism has the following defects:

1. Since the MSC sends information messages to the first terminal at a certain time interval, the first terminal cannot accurately know the start time of call waiting; and when the preset timer of the MSC exceeds the predetermined time or the third terminal hangs up and terminates the call waiting , the MSC does not notify the first terminal, so the first terminal cannot accurately know the termination time of the call waiting.

2. If the third terminal hangs up before the first terminal answers the call, and then immediately calls the first terminal again, the MSC will send more than two information messages to the first terminal. A terminal may mistake the actual two call waiting occurrences as only one; in addition, in a call waiting, if the waiting time is longer, the MSC may send multiple information messages to the first terminal, which will cause The first terminal mistakenly thinks that one call waiting has occurred multiple times, and will display an error message when displaying the missed call to the user.

3. During the existing call waiting process, if the first terminal plays a long prompt tone or ringing tone to the user, if the third terminal hangs up before the first terminal answers the call to terminate the call waiting, the MSC just stops calling the first terminal. Sending an information message does not directly notify the first terminal, so it may cause the call waiting to end, but the first terminal is still playing a prompt tone or ringing tone, making the user mistakenly believe that the call waiting is still in progress, and further based on this error message to pick up a call that actually ended and could not be reached.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method and system for implementing the call waiting service, so that the terminal can accurately know the state of the call waiting during the call waiting process, and further solve the possible problems in the existing call waiting process. A question that prompts the user with information about the error.

In order to solve the problems of the technologies described above, the purpose of the present invention is achieved through the following technical solutions:

A method for implementing a call waiting service, comprising the steps of:

A. The mobile switching center sends a message including a call waiting status flag to the first terminal through the base station subsystem;

B. The first terminal confirms the call waiting status according to the call waiting status flag in the message.

Wherein, step A specifically includes: when the third terminal calls the first terminal, if the first terminal is in a call state, the mobile switching center sends a message including a call waiting start flag to the first terminal through the base station subsystem;

Step B specifically includes: the first terminal confirms that the call waiting starts according to the start flag of the call waiting in the message.

Preferably, after step B, the method further includes: the first terminal answers the call of the third terminal, and confirms that the call waiting is over.

Preferably, after step B, it further includes: when the third terminal stops calling the first terminal or the preset timer of the mobile switching center exceeds a predetermined time, the mobile switching center sends a message containing a call waiting termination flag to the first terminal through the base station subsystem message; the first terminal confirms that the call waiting ends according to the termination flag of the call waiting in the message.

Preferably, after the first terminal confirms that the call waiting is over, the method further includes: the first terminal counts the number of missed calls according to the received call waiting termination flag, and displays the information on the interface.

Preferably, after the first terminal confirms that the call waiting starts, it plays the media tone according to preset settings; after confirming that the call waiting ends, it stops playing the media tone.

After the first terminal confirms that the call waiting starts, the method may further include: the first terminal counts the duration of the call waiting, and displays the information on the interface.

A system for implementing a call waiting service, comprising a mobile switching center and a first terminal, the mobile switching center is used to send a message including a call waiting status flag to the first terminal through a base station subsystem; the first terminal is used to The call waiting status flag in the received message confirms the status of the call waiting.

Wherein, the call waiting state flag is a call waiting start flag; the first terminal is used to confirm the call waiting according to the flag.

Preferably, the first terminal is configured to count the duration of the call waiting after confirming the start of the call waiting, and display the information on the interface.

The call waiting state flag is a call waiting start flag and a call waiting end flag; the first terminal is used to confirm the call waiting start and call waiting end according to the flags.

Preferably, the first terminal is configured to count the number of missed calls according to the received call waiting termination flag, and display the information on the interface.

The first terminal is further configured to play the media tone according to preset settings after confirming the start of the call waiting, and stop playing the media tone after confirming the end of the call waiting.

As can be seen from the above technical solutions, the present invention has the following advantages:

When call waiting occurs or ends, the first terminal can confirm the current state of call waiting according to the sign by adding a call waiting state flag in the message sent by the mobile switching center to the first terminal, so that the call waiting status can be obtained accurately. The start time or end time of .

Further, since the first terminal can accurately obtain the start time and end time of each call waiting, the problem of sending multiple information messages during one call waiting is avoided, so that the terminal can accurately and timely understand the state of call waiting, so as to provide User provides correct relevant information. For example, it can ensure that the media tone is played to inform the user that there is a call waiting to be answered after the start of the call waiting and before the end, which solves the problem that the terminal still plays the media tone when the call waiting is over and the media tone is long during the existing call waiting process. ; It can also count the number of missed calls correctly when there are missed calls.

Description of drawings

Fig. 1 is a flow chart of Embodiment 1 of the present invention's implementation of the call waiting service method;

Fig. 2 is the flow chart of Embodiment 2 of the method for realizing the call waiting service in the present invention;

Fig. 3 is the flow chart of Embodiment 3 of the method for realizing the call waiting service of the present invention;

Fig. 4 is the flow chart of Embodiment 4 of the method for realizing the call waiting service in the present invention;

Fig. 5 is a structural diagram of the system for realizing the call waiting service in the present invention.

Detailed ways

The present invention aims at the problem that the first terminal cannot accurately know the start time of call waiting in the existing call waiting process, and proposes a basic idea to solve this problem: add a CW_INDICATION (call waiting Identification) information element, defining that the value of this information element includes CW_START (call waiting start); when the third terminal calls the first terminal, the MSC sends an information message to the first terminal, and the value of the information element CW_INDICATION is set as CW_START; the first After the terminal receives the information message, it judges that if the value of CW_INDICATION is CW_START, then it confirms that call waiting starts, and can accurately know the start time of call waiting; further, the value of CW_INDICATION can also be defined to include call waiting termination (CW_END). Before answering, the third terminal hangs up or the MSC timer expires, and the MSC sends an information message to the first terminal again, setting the cell CW_INDICATION as CW_END; after receiving the information message, the first terminal judges that if the value of CW_INDICATION in the information message is CW_END, then By confirming the end of call waiting, you can accurately know the end time of call waiting.

Below in conjunction with Fig. 1, embodiment 1 of the method for realizing the call waiting service of the present invention is described. In this embodiment, the first terminal confirms that the call waiting starts in the information message sent by the MSC, and records the start time of the call waiting , and display the call waiting duration on the terminal interface to notify the user after the call waiting starts, the third terminal hangs up before the first terminal answers to terminate the call waiting, and the first terminal confirms the call waiting termination flag in the information message sent by the MSC Call waiting ends.

Step 101, the first terminal and the second terminal are talking, and the third terminal calls the first terminal.

Step 102, MSC sends information message to BSS (Base Sub System, base station subsystem), includes terminal information recording cell in this message, includes calling number sub-cell in this cell, is used to indicate the number of the 3rd terminal information; in addition, the information message also includes a call waiting identification information element, and the value of the information element is set to CW_START, indicating that the call waiting starts.

Step 103, the BSS forwards the information message containing the call waiting identifier information element sent by the MSC to the first terminal.

Step 104, after the first terminal receives the information message, it judges that if the value of the call waiting identification cell in the message is equal to CW_START, then confirm that the call waiting starts, record the current time, start timing the call waiting, and display the call waiting time on the terminal interface Wait duration.

Step 105, the first terminal extracts the number of the third terminal from the terminal information record information element of the information message, and displays the number on the terminal interface.

From step 106 to step 107, the third terminal hangs up to terminate the current call waiting, and the MSC sends an information message to the BSS, and sets the value of the call waiting identification information element in the message to CW_END, indicating that the call waiting ends.

In addition, the timer will be started when the MSC sends the information message containing the call waiting start flag to the first terminal; if the timer exceeds the predetermined time, the MSC will directly send the information message that the value of the call waiting identification cell is CW_END to the BSS, Indicates that call waiting has ended.

Step 108, the BSS forwards the information message including the call waiting identifier information element to the first terminal.

Step 109: After receiving the information message, the first terminal judges that if the value of the call waiting identification cell in the message is equal to CW_END, then confirms that call waiting is over, and stops displaying the call waiting duration and the number of the third terminal on the terminal interface.

In conjunction with Fig. 2, the second embodiment of the method for realizing the call waiting service of the present invention is described. In this embodiment, the first terminal confirms that the call waiting starts in the information message sent by the MSC. The terminal hangs up before answering to terminate the call waiting, and the first terminal confirms the end of the call waiting through the call waiting termination sign in the information message sent by the MSC, counts the number of missed calls, and displays the information on the interface.

Step 201, the first terminal and the second terminal are talking, and the third terminal calls the first terminal.

Step 202, the MSC sends an information message to the BSS, the message includes a terminal information record cell, and the cell includes a calling number sub-cell, which is used to indicate the number information of the third terminal; in addition, the information message also includes The call waiting identification information element, the value of which is set to CW_START, indicates that the call waiting starts.

Step 203, the BSS forwards the information message containing the call waiting identifier information element sent by the MSC to the first terminal.

Step 204, after the first terminal receives the information message, it judges that if the value of the call waiting identification cell in the message is equal to CW_START, then confirm that the call waiting starts, record the current time, start timing the call waiting, and display the call waiting time on the terminal interface Wait duration.

Step 205, the first terminal extracts the number of the third terminal from the terminal information record information element of the information message, and displays the number on the terminal interface.

From step 206 to step 207, the third terminal hangs up to terminate the current call waiting, and the MSC sends an information message to the BSS, and sets the value of the call waiting identification information element in the message to CW_END, indicating that the call waiting ends.

In addition, the timer will be started when the MSC sends the information message containing the call waiting start flag to the first terminal; if the timer exceeds the predetermined time, the MSC will directly send the information message that the value of the call waiting identification cell is CW_END to the BSS, Indicates that call waiting has ended.

Step 208, the BSS forwards the information message including the call waiting identifier information element to the first terminal.

Step 209, after the first terminal receives the information message, it judges that if the value of the call waiting identification cell in the message is equal to CW_END, then confirm that the call waiting is over, and stop displaying the call waiting duration and the number of the third terminal on the terminal interface .

Step 210, the first terminal counts the number of missed calls after confirming that the call waiting is over, and displays the information on the terminal interface.

If the third terminal hangs up before the first terminal answers, and then the third terminal or other terminals call the first terminal again, the first terminal will, after receiving the information message sent by the MSC, If the value is equal to CW_START, stop displaying the number of missed calls, and display the call waiting duration and the terminal number information of the first terminal being called; if the first terminal judges that the value of the call waiting identification cell in the message is equal to CW_END, then stop Display the call waiting duration and the terminal number information of the calling first terminal, and display on the interface after adding one to the number of missed calls.

Below in conjunction with Fig. 3, the third embodiment of the method for realizing the call waiting service of the present invention is described. In this embodiment, the first terminal confirms that the call waiting starts in the information message sent by the MSC. A terminal hangs up before answering to terminate the call waiting, and the first terminal confirms that the call waiting is terminated through the call waiting termination sign in the information message sent by the MSC, and plays a prompt tone within this time period to remind the user that a call is waiting to be answered.

Step 301, the first terminal and the second terminal are talking, and the third terminal calls the first terminal.

Step 302, the MSC sends an information message to the BSS, the message includes a terminal information record cell, and the cell includes a calling number sub-cell, which is used to indicate the number information of the third terminal; in addition, the information message also includes The call waiting identification information element, the value of which is set to CW_START, indicates that the call waiting starts.

Step 303, the BSS forwards the information message containing the call waiting identifier information element sent by the MSC to the first terminal.

Step 304, after the first terminal receives the information message, it judges that if the value of the call waiting identification cell in the message is equal to CW_START, then confirm that the call waiting starts, record the current time, start timing the call waiting, and display the call waiting time on the terminal interface Wait duration.

Step 305, the first terminal extracts the number of the third terminal from the terminal information record information element of the information message, and displays the number on the terminal interface.

Step 306, the first terminal plays a media tone to notify the user that there is another call waiting to be answered.

From step 307 to step 308, the third terminal hangs up to terminate the current call waiting, and the MSC sends an information message to the BSS, and sets the value of the call waiting identification information element in the message to CW_END, indicating that the call waiting ends.

In addition, the timer will be started when the MSC sends the information message containing the call waiting start flag to the first terminal; if the timer exceeds the predetermined time, the MSC will directly send the information message that the value of the call waiting identification cell is CW_END to the BSS, Indicates that call waiting has ended.

Step 309, the BSS forwards the information message including the call waiting identifier information element to the first terminal.

Step 310, after the first terminal receives the information message, if it judges that the value of the call waiting identification cell in the message is equal to CW_END, then confirm that the call waiting is over, and stop displaying the call waiting duration and the number of the third terminal on the terminal interface , and stop playing the media sound.

In this embodiment, the first terminal plays a media tone to notify the user that another call is waiting to be answered. As in the ordinary call service, the media tone can be a common prompt tone or a personalized ring tone, or the first terminal can be set to Vibrate to notify user during call waiting.

In the above embodiments, the third terminal hangs up before the first terminal answers or the MSC timer expires to terminate the call waiting. The call waiting can also be terminated because the first terminal answers the call. At this time, the first terminal can know the accurate call waiting termination time, so the MSC does not need to send a message with the call waiting termination information to the first terminal after the call waiting is terminated. information message.

Embodiment 4 of the method for realizing the call waiting service of the present invention will be described below in conjunction with FIG. Wait for the duration and play a prompt to notify the user that there is a call waiting to be answered; after the first terminal answers the call from the third terminal to terminate the call waiting, stop displaying the call waiting duration and stop playing the prompt.

Step 401, the first terminal and the second terminal are talking, and the third terminal calls the first terminal.

Step 402, the MSC sends an information message to the BSS, the message includes a terminal information record cell, and the cell includes a calling number sub-cell, which is used to indicate the number information of the third terminal; in addition, the information message also includes The call waiting identification information element, the value of which is set to CW_START, indicates that the call waiting starts.

Step 403, the BSS forwards the information message containing the call waiting identifier information element sent by the MSC to the first terminal.

Step 404, after the first terminal receives the information message, it judges that if the value of the call waiting identification cell in the message is equal to CW_START, then confirm that the call waiting starts, record the current time, start timing the call waiting, and display the call waiting time on the terminal interface Wait duration.

Step 405, the first terminal extracts the number of the third terminal from the terminal information record information element of the information message, and displays the number on the terminal interface.

Step 406, the first terminal plays a media tone to notify the user that there is another call waiting to be answered.

Step 407, the first terminal answers the call from the third terminal, terminates the current call waiting, stops displaying the duration of the call waiting and the number of the third terminal on the terminal interface, and stops playing the media sound.

From step 408 to step 409, the first terminal sends an information message to the BSS; the BSS forwards the information message to the MSC.

Step 410, the MSC notifies the third terminal that the call can be made.

In this embodiment, the first terminal plays a media tone to notify the user that another call is waiting to be answered. As in the ordinary call service, the media tone can be a common prompt tone or a personalized ring tone, or the first terminal can be set to Vibrate to notify user during call waiting.

In conjunction with FIG. 5, Embodiment 1 of the system for realizing the call waiting service provided by the present invention is described, the system includes a first terminal 501, a second terminal 505, a third terminal 502, a mobile switching center 503 and a base station subsystem 504, wherein :

The first terminal 501 is used for receiving the information message from the base station subsystem 504 during the conversation with the second terminal 505, and judging that if the value of the call waiting identifier cell in the message is the start of call waiting, then confirm the start of call waiting, and obtain The start time of call waiting; if the value of the call waiting identification information element in the message is call waiting end, then the end of call waiting is confirmed.

The first terminal 501 is also used for timing the call waiting after confirming that the call waiting starts, displaying the duration of the call waiting on the terminal interface, and extracting the number of the third terminal from the terminal information recording cell of the information message, and This number is displayed on the terminal interface; it is also used to play a prompt or personalized ring tone after confirming the start of call waiting.

The first terminal 501 is further configured to stop displaying the call waiting duration and the third terminal number on the terminal interface, and stop playing the prompt tone or the personalized ring tone when the end of the call waiting is confirmed.

In addition, the first terminal 501 is further configured to count the number of missed calls according to the call waiting termination flag in the received prompt information, and display the information on the terminal interface.

The third terminal 502 is used to call the first terminal 501 and enter call waiting when the first terminal 501 is talking with the second terminal 502; it is also used to hang up and terminate the call waiting when the first terminal 501 does not answer.

The mobile switching center 503 is used to send an information message to the base station subsystem 504 when the third terminal 502 calls the first terminal 501, set the value of the call waiting identification information element in the message as the call waiting start, and pass the terminal in the information message The calling number sub-cell of the information record cell indicates the number information of the third terminal 502; it is also used to send a message to the third terminal 502 when the first terminal 501 does not answer and the third terminal 502 hangs up or the timer of the mobile switching center 503 exceeds a predetermined time The base station subsystem 504 sends an information message in which the information element value of the call waiting identifier is end of call waiting.

The base station subsystem 504 is configured to forward the information message sent by the mobile switching center 503 to the first terminal 501 .

The structural diagram of the second embodiment of the system for realizing the call waiting service provided by the present invention is the same as that of the first embodiment, including a first terminal, a second terminal, a third terminal, a mobile switching center and a base station subsystem, wherein:

The first terminal is used for receiving an information message from the base station subsystem during a call with the second terminal, and judging that if the value of the call waiting identification cell in the message is the start of call waiting, then confirm the start of call waiting, and obtain the start of call waiting time, and after confirming the start of the call waiting, time the call waiting, display the duration of the call waiting on the terminal interface, and extract the number of the third terminal from the terminal information record cell of the information message, and display the number on the On the terminal interface; also used to play a prompt tone or a personalized ring tone after confirming the start of call waiting.

The first terminal is also used to send an information message to the mobile switching center through the base station subsystem after answering the call waiting from the third terminal, and stop displaying the call waiting duration and the third terminal number on the terminal interface, and stop playing the prompt tone or personalized ring tone.

The third terminal is configured to call the first terminal when the first terminal is talking with the second terminal, and enter into call waiting.

The mobile switching center is used to send an information message to the base station subsystem when the third terminal calls the first terminal, set the value of the call waiting identification cell in the message as the start of call waiting, and record the cell in the information message through the terminal information The calling number sub-information element of the third terminal is used to indicate the number information of the third terminal.

The base station subsystem is configured to forward the information message including the call waiting start flag sent by the mobile switching center to the first terminal.

The method and system for realizing the call waiting service provided by the present invention have been introduced in detail above. In this paper, specific examples are used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only used to help understand the method of the present invention. and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. limits.

Claims (13)

1. A method for realizing a call waiting service, characterized in that the method comprises steps: A. The mobile switching center sends a message including a call waiting status flag to the first terminal through the base station subsystem; B. The first terminal confirms the call waiting status according to the call waiting status flag in the message. 2. The method for realizing call waiting service according to claim 1, characterized in that: Step A specifically includes: when the third terminal calls the first terminal, if the first terminal is in a call state, the mobile switching center sends a message including a call waiting start flag to the first terminal through the base station subsystem; Step B specifically includes: the first terminal confirms that the call waiting starts according to the call waiting start flag in the message. 3. The method for realizing the call waiting service according to claim 2, characterized in that after step B, the method further comprises: the first terminal answers the call of the third terminal, and confirms that the call waiting ends. 4. The method for realizing call waiting service according to claim 2, characterized in that, after step B, it further comprises: when the third terminal stops calling the first terminal or when the preset timer of the mobile switching center exceeds a predetermined time, the mobile switching center The center sends a message including the call waiting end flag to the first terminal through the base station subsystem; the first terminal confirms that the call waiting ends according to the call waiting end flag in the message. 5. The method for implementing call waiting service according to claim 4, characterized in that after the first terminal confirms that the call waiting is over, it further comprises: the first terminal counts the number of missed calls according to the received call waiting termination flag, and This information is displayed on the interface. 6. The method for realizing the call waiting service according to any one of claims 3 to 5, characterized in that, after the first terminal confirms that the call waiting starts, it plays the media sound according to the preset setting; after the first terminal confirms that the call waiting ends, it stops Play media tones. 7. The method for realizing the call waiting service according to any one of claims 2 to 5, characterized in that, after the first terminal confirms that the call waiting starts, it further includes: the first terminal counts the duration of the call waiting, and displays on the interface the information. 8. A system for implementing a call waiting service, comprising a mobile switching center and a first terminal, wherein the mobile switching center is used to send a message including a call waiting state flag to the first terminal through a base station subsystem; the The first terminal is configured to confirm the state of the call waiting according to the state flag of the call waiting in the received message. 9. The system for implementing call waiting service according to claim 8, characterized in that, the call waiting state flag is a call waiting start flag; the first terminal is used to confirm the start of call waiting according to the flag. 10. The system for implementing call waiting service according to claim 9, characterized in that the first terminal is used to count the duration of call waiting after confirming the start of call waiting, and display the information on the interface. 11. The system for implementing call waiting service according to claim 8, characterized in that, said call waiting status flags are a call waiting start flag and a call waiting termination flag; the first terminal is used to confirm the start of call waiting according to said flags and call waiting ends. 12. The system for implementing call waiting service according to claim 11, wherein the first terminal is used to count the number of missed calls according to the received call waiting termination flag, and display the information on the interface. 13. The system for realizing call waiting service according to claim 11, characterized in that, the first terminal is also used to play the media tone according to the preset setting after confirming the start of call waiting, and stop playing the media after confirming the end of call waiting sound.

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