WO2018082466A1

WO2018082466A1 - Method, device, and system for message transmission

Info

Publication number: WO2018082466A1
Application number: PCT/CN2017/107340
Authority: WO
Inventors: 高扬; 穆凌江
Original assignee: 中兴通讯股份有限公司
Priority date: 2016-11-07
Filing date: 2017-10-23
Publication date: 2018-05-11
Also published as: CN108064061A; CN108064061B

Abstract

Provided in the present invention are a method, device, and system for message transmission. The method comprises: determining, when a calling device executes a single radio voice call continuity (SRVCC) switching before alerting, a called device as being in a call alerting state; and transmitting to an enhanced mobile switching center (E-MSC) a confirmation message used for confirming SRVCC, where the confirmation message carries first identification information used for identifying that the calling device is in a pre-alerting state, and the first identification information is for use by the E-MSC to instruct the calling device to play back a ringback tone. The present disclosure solves the problem in the prior art in which, when an SRVCC switching occurs at a calling device, a called device goes directly into a call alerting state and thereby causing the calling device to be unable to play back a ringback tone, thus achieving the effect of enhanced user experience. (Fig. 3)

Description

Message sending method, device and system

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a message sending method, apparatus, and system.

Background technique

The Single Radio Voice Call Continuity (bSRVCC) is an enhanced technical solution proposed by the 3GPP for the calling user to initiate a call, but the called party does not have a ringing phase and the calling user has an SRVCC handover. From the perspective of radio resource reservation, because the time is in the second level (normal situation 3-5 seconds, network status is not good, it takes longer), the probability of the SRVCC handover of the calling user is very high at this stage. . If the calling user cannot hear the ring back tone during this process, it will cause a problem of poor user experience.

The specific reason is that the bSRVCC process currently defined by the 3GPP has problems in the control of the call state and the processing of the ring back tone. For details, refer to the following analysis:

FIG. 1 is a schematic flowchart of a typical bSRVCC that can hear a ringback tone, illustrating that UE-1 is the calling user and UE-2 is the called user. UE-1 initiates a call and a bSRVCC handover occurs before ringing.

As shown in Figure 1, the process includes:

Step 1: The access side triggers a bSRVCC switch.

Step 2: The Enhanced Mobile Switch Center (E-MSC) sends a switched INVITE to the Service Centralization and Continuity Application Server (SCC_AS);

Step 3: The SCC_AS sends the SDP in the INVITE to the remote UE by using an UPDATE.

Step 4, the remote UE returns 200 OK;

Step 5, SCC_AS sends the SDP in 200 OK to the E-MSC through 183;

Step 6, the E-MSC returns to the PRACK;

Step 7, SCC_AS returns 200OK;

Step 8: Because it is a pre-ringing call state, the SCC_AS sends an INFO to the E-MSC to carry a pre-alerting state; it should be noted that the INFO message belongs to a signaling message of the SIP protocol;

Step 9, the E-MSC returns to 200 OK;

Step 10, the remote UE enters a ringing state, and sends 180;

Step 11, the SCC_AS forwards 180 to the E-MSC;

Step 12: The E-MSC according to the previous state is pre-alerting, and in combination with the received 180, it is determined that an alert indication needs to be sent to the UE-1, and the UE-1 returns a ring tone to the calling user according to the indication.

However, in the project, the actual bSRVCC process will have many conditions because of factors such as user operation timing and resource reservation timing. And in accordance with the existing 3GPP standards. These process combinations will not hear the ringback tone, Figure 2 is related In the technology, the bSRVCC does not hear the loopback tone. The description shows that UE-1 is the calling user and UE-2 is the called user. UE-1 initiates a call and a bSRVCC handover occurs before ringing. As shown in Figure 2, the process includes:

Step 1: The access side triggers a bSRVCC switch.

Step 2: The E-MSC sends the switched INVITE to the SCC_AS.

Step 4, the remote UE returns 200 OK;

Step 5, SCC_AS sends the SDP in 200 OK to the E-MSC through 183;

Step 6, because the resource reservation and the like, the remote UE directly enters the ringing state, and sends 180;

Step 7, SCC_AS forwards 180 to the E-MSC;

Step 8, the E-MSC returns to the PRACK;

Step 9, SCC_AS returns 200 OK;

Step 10, because the ringing call state has been entered at this time, the SCC_AS sends the INFO to the E-MSC, and carries the state of the ringing state (early);

Step 11, the E-MSC returns to 200 OK;

According to the definition of the existing 3GPP specifications, the E-MSC only receives the INFO (pre-alerting) indication first, and then receives 180, and then converts 180 to the Alert indication and sends it to the UE. Therefore, the above procedure does not meet the requirement, so that the E-MSC cannot send an Alert to the UE-1, and the calling user cannot hear the ringback tone.

The calling user cannot hear the ringback tone. Firstly, the caller experience is not good. The user may think that the caller cannot connect and hang up in advance. In addition, in many engineering bureaus, in the bSRVCC switch, the ringback tone is used as the connection rate. As an important part, the above problems will greatly reduce the statistics of the call completion rate of the local party.

In response to the above technical problems, no effective solution has been proposed yet.

Summary of the invention

The embodiment of the present disclosure provides a method, a device, and a system for sending a message, so as to at least solve the problem that the called device directly enters the ringing call state after the SRVCC handover occurs in the related device in the related art, so that the calling device cannot play the ringback tone. problem.

According to an embodiment of the present disclosure, a message sending method is provided, including: determining that a called device is in a ringing call state after performing a single radio frequency voice continuity SRVCC handover before ringing; to an enhanced mobile switching The central E-MSC sends an acknowledgment message for confirming the SRVCC, where the acknowledgment message carries first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used by the E-MSC to indicate to the calling device. Play the ringback tone.

Optionally, the confirmation message includes one of the following information: 180 message and INFO message.

Optionally, in the case that the acknowledgement message is 180, the method further comprises: determining that the INFO message is not sent to the E-MSC before sending the acknowledgement message to the E-MSC.

Optionally, in the case that the acknowledgement message is an INFO message, it is sent to the E-MSC to confirm the SRVCC. Before the message is acknowledged, the method further includes: determining whether to forward the 180 message sent by the called device to the E-MSC; and if the determination result is no, sending an acknowledgement message to the E-MSC.

Optionally, after the sending the acknowledgment message to the E-MSC, the method further includes: receiving a response message sent by the E-MSC corresponding to the acknowledgment message; determining whether there is a 180 message indicating that the received device has received the received message. Second identification information; in the case where it is determined that the second identification information exists, the 180 message is constructed and the constructed 180 message is sent to the E-MSC.

Optionally, before determining whether to forward the 180 message sent by the called device to the E-MSC, the method further includes: receiving the 180 message sent by the called device; determining whether the E-MSC corresponding to the INFO information is received. Response information; in the case of a negative judgment result, the 180 message sent by the called device is discarded, and the 180 message received by the called device is marked by the second identification information, and the second identification information is stored.

Optionally, after the sending the acknowledgment message to the E-MSC, the method further includes: receiving a response message sent by the E-MSC corresponding to the acknowledgment message; forwarding the media update message to the called terminal; wherein the media update message carries The resource reservation state that is called by the terminal; after forwarding the response message corresponding to the media update message to the E-MSC, the 180 message is forwarded to the E-MSC.

Optionally, the first identification information is carried by the extensible markup voice XML structure.

According to an embodiment of the present disclosure, a message sending method is provided, including: after a calling device performs a single radio frequency voice continuity SRVCC before ringing, when the called device is in a ringing call state, the receiving service is continuous. An acknowledgment message sent by the application server SCC_AS for confirming the SRVCC; wherein the acknowledgment message carries first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used by the E-MSC to the calling device. Instructing to play a ringback tone; sending a ringing indication message to the calling device to instruct the calling device to play the ringback tone.

Optionally, in the case that the acknowledgement message is 180, the method further includes: determining that the INFO message sent by the SCC_AS has not been received before the acknowledgement message sent by the SCC_AS.

Optionally, in the case that the acknowledgement message is an INFO message, the acknowledgement message sent by the service continuity application server SCC_AS for confirming the SRVCC includes: in the case that the 180 message sent by the called device forwarded by the SCC_AS has not been received, Receive the confirmation message sent by SCC_AS.

Optionally, after receiving the acknowledgement message sent by the service continuity application server SCC_AS for confirming the SRVCC, the method further includes: receiving the 180 message of the SCC_AS configuration sent by the SCC_AS.

Optionally, before receiving the 180 message of the SCC_AS configuration sent by the SCC_AS, the method further includes: sending a response message corresponding to the acknowledgement message to the SCC_AS; and sending a media update message to the called terminal by using the SCC_AS; wherein the media update message carries the A resource reservation state that is called by the terminal; receiving, by the SCC_AS, a response message corresponding to the media update message sent by the called terminal.

According to an embodiment of the present disclosure, a message sending apparatus is provided, including: a determining module, configured to determine that a called device is in a ringing call state after performing a single radio frequency voice continuity SRVCC before ringing; Mode a block, configured to send an acknowledgment message for confirming the SRVCC to the enhanced mobile switching center E-MSC, where the acknowledgment message carries first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used. The E-MSC instructs the calling device to play a ring back tone.

Optionally, the determining module is further configured to: if the acknowledgment message is 180, determine that the INFO message is not sent to the E-MSC before sending the acknowledgment message to the E-MSC.

Optionally, the device further includes: a first determining module, configured to determine, before sending the acknowledgement message for confirming the SRVCC to the E-MSC, that the acknowledgement message is an INFO message, whether the called party is forwarded to the E-MSC The 180 message sent by the device; wherein, if the determination result is no, the sending module sends an acknowledgement message to the E-MSC.

Optionally, the device further includes: a receiving module, configured to: after sending the acknowledgement message to the E-MSC, receive a response message that is sent by the E-MSC and corresponding to the acknowledgement message; and the second determining module is configured to determine whether the indication exists The second identifier information of the 180 message sent by the called device has been received; the constructing module is configured to construct 180 a message if it is determined that the second identifier information exists; and the sending module is further configured to send the configured structure to the E-MSC 180 messages.

Optionally, the receiving module is further configured to: before receiving the 180 message sent by the called device to the E-MSC, receive the 180 message sent by the called device; the first determining module is further configured to determine whether the E is received. - response information corresponding to the INFO information sent by the MSC; the device further comprising: a discarding module, configured to discard the 180 message sent by the called device if the determination result is no; the marking module is configured to mark by using the second identification information Received 180 messages sent by the called device; the storage module is configured to store the second identification information.

According to an embodiment of the present disclosure, a message sending apparatus is provided, including: a receiving module, configured to: when a calling device performs a single radio frequency voice continuity SRVCC before ringing, the called device is in a ringing call state And receiving, by the service continuity application server SCC_AS, an acknowledgment message for confirming the SRVCC, where the acknowledgment message carries the first identifier information for identifying that the calling device is in a pre-ringing state, and the first identifier information is used for E- The MSC indicates to the calling device that the ringback tone is played, and the sending module is configured to send, to the calling device, a ringing indication message for instructing the calling device to play the ringback tone.

Optionally, the apparatus further includes: a determining module, configured to determine, before the acknowledgment message sent by the SCC_AS, that the INFO message sent by the SCC_AS is not received before the acknowledgment message is 180.

Optionally, the receiving module is further configured to: when the acknowledgment message is an INFO message, receive the acknowledgment message sent by the SCC_AS if the 180 message sent by the called device forwarded by the SCC_AS is not received.

Optionally, the receiving module is further configured to: after receiving the acknowledgement message sent by the service continuity application server SCC_AS for confirming the SRVCC, receive the 180 message of the SCC_AS configuration sent by the SCC_AS.

According to an embodiment of the present disclosure, a system is provided, including: a calling device, a called device, an enhanced mobile switching center E-MSC, and a service continuity application server SCC_AS; and the SCC_AS is used to determine that the calling device is in vibration After the single radio frequency voice continuity SRVCC is performed, the called device is in a ringing call state; and an acknowledgment message for confirming the SRVCC is sent to the E-MSC, where the acknowledgment message carries the identifier for identifying that the calling device is ringing. The first identification information of the state; the E-MSC is configured to receive the acknowledgement information sent by the SCC_AS, and send a ringing indication message to the calling terminal to instruct the calling device to play the ringback tone.

Optionally, the SCC_AS is further configured to: when the acknowledgment message is 180, determine that the INFO message is not sent to the E-MSC before sending the acknowledgment message to the E-MSC.

Optionally, the SCC_AS is further configured to: before sending the acknowledgement message for confirming the SRVCC to the E-MSC, if the acknowledgement message is an INFO message, determining whether to forward the 180 message sent by the called device to the E-MSC; If the result of the determination is no, an acknowledgement message is sent to the E-MSC.

Optionally, the SCC_AS is further configured to: after sending the acknowledgment message to the E-MSC, receive a response message sent by the E-MSC corresponding to the acknowledgment message; and determine whether there is a message 180 for indicating that the called device has received the message. Second identification information; and in the case where it is determined that the second identification information exists, the 180 message is constructed and the constructed 180 message is sent to the E-MSC.

Optionally, the SCC_AS is further configured to: before receiving the 180 message sent by the called device to the E-MSC, receive the 180 message sent by the called device; and determine whether the E-MSC sends the corresponding message corresponding to the INFO information. The response information; and in the case that the judgment result is no, the 180 message sent by the called device is discarded, and the 180 message received by the called device is marked by the second identification information, and the second identification information is stored.

According to still another embodiment of the present disclosure, a storage medium is also provided. The storage medium is configured to store program code for performing the steps of: determining that the called device is in a ringing call state after performing a single radio frequency voice continuity SRVCC handover before ringing; to the enhanced mobile switching center E- The MSC sends an acknowledgment message for confirming the SRVCC, where the acknowledgment message carries the first identifier information for identifying that the calling device is in a pre-ringing state, and the first identifier information is used by the E-MSC to indicate to the calling device that the ringback is played back. sound.

According to still another embodiment of the present disclosure, a storage medium is also provided. The storage medium is configured to store program code for performing the following steps: receiving a service continuity application server if the called device is in a ringing call state after the calling device performs a single radio frequency voice continuity SRVCC before ringing The acknowledgment message sent by the SCC_AS for confirming the SRVCC; wherein the acknowledgment message carries the first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used by the E-MSC to indicate the playback back to the calling device. Ringing tone; sending a ringing indication message to the calling device to instruct the calling device to play the ringback tone.

Through the present disclosure, after the called device directly enters the ringing call state after the SRVCC handover occurs, the acknowledgment message for confirming the SRVCC is sent to the E-MSC, where the acknowledgment message carries the identifier for identifying the calling party. The device is in the state of the pre-ringing state, and the first identifier information is used by the E-MSC to indicate to the calling device that the ringback tone is played, so that the calling device can also be informed after the called device directly enters the ringing call state. The calling device is in a pre-ringing state, and then the ringback tone can be played, so that the ringing tone can be played after the called device directly enters the ringing call state. Therefore, the SRVCC switching of the calling device in the related art can be solved. After, the called device Directly entering the ringing call state causes the problem that the calling device plays the ringback tone, which improves the user experience.

DRAWINGS

The drawings described herein are provided to provide a further understanding of the present disclosure, which is a part of the present disclosure, and the description of the present disclosure and the description thereof are not intended to limit the disclosure. In the drawing:

1 is a schematic flow chart of a typical bSRVCC that can hear a ringback tone;

2 is a schematic flow chart of the bSRVCC not hearing the ringback tone in the related art;

3 is a schematic flowchart 1 of a method for sending a message according to an embodiment of the present disclosure;

FIG. 4 is a second schematic flowchart of a message sending method according to an embodiment of the present disclosure;

FIG. 5 is a schematic diagram of a process flow of a first solution according to a preferred embodiment of the present disclosure; FIG.

6 is a schematic flowchart 1 of a second solution according to a preferred embodiment of the present disclosure;

7 is a second schematic diagram of a second scheme according to a preferred embodiment of the present disclosure;

8 is a schematic flowchart 3 of a second solution according to a preferred embodiment of the present disclosure;

9 is a structural block diagram 1 of a message transmitting apparatus according to an embodiment of the present disclosure;

FIG. 10 is a structural block diagram 2 of a message transmitting apparatus according to an embodiment of the present disclosure; FIG.

11 is a structural block diagram of a system provided in accordance with an embodiment of the present disclosure.

detailed description

The present disclosure will be described in detail below with reference to the drawings in conjunction with the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

It is to be understood that the terms "first", "second", and the like in the specification and claims of the present disclosure are used to distinguish similar objects, and are not necessarily used to describe a particular order or order.

Example 1

The present embodiment provides a message sending method. FIG. 3 is a schematic flowchart 1 of a message sending method according to an embodiment of the present disclosure. As shown in FIG. 3, the method includes:

Step S302, after determining that the calling device performs single radio frequency voice continuity SRVCC switching before ringing, the called device is in a ringing call state;

Step S304, sending an acknowledgment message for confirming the SRVCC to the enhanced mobile switching center E-MSC, where the acknowledgment message carries first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used for The E-MSC instructs the calling device to play a ring back tone.

Through the above steps, after the called device directly enters the ringing call state after the SRVCC handover occurs, the acknowledgment message for confirming the SRVCC is sent to the E-MSC, where the acknowledgment message carries the identifier for identifying the calling party. The device is in the state of the pre-ringing state, and the first identifier information is used by the E-MSC to indicate to the calling device that the ringback tone is played, so that the calling device can also be informed after the called device directly enters the ringing call state. The calling device is in a pre-ringing state, and then the ringback tone can be played, thereby causing the called device to directly enter the ringing call state. After that, the ringback tone can be played back. Therefore, the problem that the called device directly enters the ringing call state after the SRVCC switching of the calling device in the related art causes the calling device to play the ringback tone cannot be solved, thereby improving the user experience. degree.

It should be noted that the foregoing confirmation message may include one of the following information: 180 message and INFO message.

In an embodiment of the present disclosure, in the case that the acknowledgement message is a 180 message, the method may further include: determining that the INFO message was not sent to the E-MSC before sending the acknowledgement message to the E-MSC.

In an embodiment of the present disclosure, before the acknowledgment message is an INFO message, before the sending the acknowledgment message for confirming the SRVCC to the E-MSC, the method may further include: determining whether the called party is forwarded to the E-MSC. The 180 message sent by the device; if the judgment result is no, the confirmation message is sent to the E-MSC.

It should be noted that, in the case that the determination result is YES, that is, in the case that the 180 message sent by the called device is forwarded to the E-MSC before the E-MSC transmits the acknowledgment message for confirming the SRVCC, the message is sent to the E- The acknowledgment message sent by the MSC carries identification information for identifying that the calling device is in the ringing state early.

It should be noted that after the foregoing step S304, the method may further include: receiving a response message sent by the E-MSC corresponding to the acknowledgement message; determining whether there is a message indicating that the 180 message sent by the called device has been received. Two identification information; in the case where it is determined that the second identification information exists, the 180 message is constructed and the constructed 180 message is sent to the E-MSC.

It should be noted that, before determining whether to forward the 180 message sent by the called device to the E-MSC, the method may further include: receiving the 180 message sent by the called device; determining whether the E-MSC sends the INFO and the INFO. The response information corresponding to the information; if the judgment result is no, the 180 message sent by the called device is discarded, and the 180 message sent by the called device is marked by the second identification information, and the second identification information is stored.

It should be noted that, in the case that the determination result is YES, that is, when the response information corresponding to the INFO information transmitted by the E-MSC has been received, the 180 message is directly transmitted to the E-MSC.

In an embodiment of the present disclosure, after the step S304, the method may further include: receiving a response message sent by the E-MSC corresponding to the acknowledgement message; forwarding the media update message to the called terminal; wherein, the media update message The resource reservation state completed by the called terminal is carried; after the response message corresponding to the media update message is forwarded to the E-MSC, the 180 message is forwarded to the E-MSC.

It should be noted that the first identifier information is carried by the extensible mark voice XML structure, but is not limited thereto. It should be noted that the above XML structure can be:

It should be noted that the execution body of the above steps may be SCC_AS, but is not limited thereto.

The embodiment of the present disclosure further provides a message sending method. FIG. 4 is a schematic flowchart 2 of a message sending method according to an embodiment of the present disclosure. As shown in FIG. 4, the foregoing method includes:

Step S402, after the calling device performs the single radio frequency voice continuity SRVCC before ringing, the called device is in vibration. In the case of the ringing call state, the acknowledgment message sent by the service continuity application server SCC_AS for confirming the SRVCC is received; wherein the acknowledgment message carries the first identification information for identifying that the calling device is in a pre-ringing state, the first identifier The information is used by the E-MSC to indicate to the calling device to play a ring back tone;

Step S404, sending a ringing indication message for instructing the calling device to play the ring back tone to the calling device.

After the SRVCC switchover occurs, the called device directly enters the ringing call state, and receives an acknowledgment message for confirming the SRVCC, where the acknowledgment message carries a message for identifying that the calling device is ringing. The first identification information of the previous state, and sending a ringing indication message for instructing the calling device to play the ringback tone to the calling device, so that the calling device can also make the calling device also after the called device directly enters the ringing call state. The ringback tone is played. Therefore, the problem that the called device directly enters the ringing call state after the SRVCC switching of the calling device in the related art causes the calling device to play the ringback tone cannot be solved, thereby improving the user experience.

In an embodiment of the present disclosure, in the case that the acknowledgement message is a 180 message, the method may further include: determining that the INFO message sent by the SCC_AS has not been received before the acknowledgement message sent by the SCC_AS.

In an embodiment of the present disclosure, in the case that the confirmation message is an INFO message, the foregoing step S402 may include: receiving an acknowledgement sent by the SCC_AS if the 180 message sent by the called device forwarded by the SCC_AS has not been received. Message.

It should be noted that, after the foregoing step S402, the foregoing method may further include: receiving the 180 message of the SCC_AS configuration sent by the SCC_AS.

In an embodiment of the present disclosure, before receiving the 180 message of the SCC_AS configuration sent by the SCC_AS, the foregoing method may further include: sending a response message corresponding to the acknowledgement message to the SCC_AS; and sending a media update message to the called terminal by using the SCC_AS; The media update message carries the resource reservation status completed by the called terminal, and receives the response message corresponding to the media update message sent by the called terminal by using the SCC_AS.

It should be noted that the foregoing first identification information may be carried by the extensible mark voice XML structure.

It should be noted that the above XML structure can be:

It should be noted that the execution body of the steps of the method shown in FIG. 4 may be an E-MSC, but is not limited thereto.

For a better understanding of the present disclosure, the present disclosure is further explained in conjunction with the preferred embodiments.

Embodiments of the present disclosure provide two preferred bSRVCC handover schemes for supporting ringback tones:

Solution 1: The SCC_AS cooperates with the E-MSC to solve the problem. Specifically, after the SCC_AS receives 180, it is forwarded to the calling party 180 when the following conditions are met, and the pre-alerting XML structure needs to be carried.

The structure of XML:

Condition: Currently bSRVCC switch; and INFO (pre-alerting) has not been sent to the caller;

The E-MSC receives the 180 carrying the pre-alerting XML structure, sends an Alert indication to the calling UE, and plays the sound to the calling user by the UE.

It should be noted that, in the first solution, the advantage is that the logic is simple and easy to implement.

Option II:

Solved by SCC_AS alone, by controlling the timing and constructing messages, all the parts of the bSRVCC compatible process that interact with the E-MSC are normalized into standard 3GPP processes. The logic of SCC_AS processing:

1, determine whether it is bSRVCC switch

2. Receive 180 in the backward direction, judge whether to receive the 200 OK corresponding to the INFO, if it receives 200 OK, issue 180; if it has not received the 200 OK, discard the 180 and mark the identifier to receive 180

3. When sending INFO, judge whether the forward direction has been sent 180. If it has not been sent 180, INFO has pre-alerting XML structure; if it has already sent 180, INFO has early XML structure

4. Receive the 200 OK of the INFO. If there is a token of 180, the construct 180 is sent to the forward.

For the second solution, the advantage is that only the SCC_AS network element can be modified, and the E-MSC of other vendors can be connected and the problem can be solved.

Through the above solution, the calling user can normally hear the ring back tone during the bSRVCC handover process.

FIG. 5 is a schematic diagram of a process flow of a first solution according to a preferred embodiment of the present disclosure. As shown in FIG. 5, the process includes:

1. The access side triggers bSRVCC switching;

2. The E-MSC sends a handover INVITE call request to the SCC_AS.

3. The SCC_AS sends the SDP in the INVITE to the remote UE by using an UPDATE media update message.

4. The remote UE returns a 200 OK response message.

5, SCC_AS sends the SDP in the 200 OK response message to the E-MSC through the 183 message;

6. The remote UE directly enters the ringing state and sends 180 messages because of resource reservation and the like.

7, SCC_AS forwards 180, and carries the pre-alerting call state, and sends it to the E-MSC;

8. The E-MSC sends an Alert to the calling UE according to the 180 and carries the pre-alerting call state, and the calling user can hear the ringback tone;

9, the E-MSC returns a PRACK request message;

10, SCC_AS returns 200 OK response message;

11. Since the ringing call state has been entered at this time, the SCC_AS sends an INFO request message to the E-MSC, carrying the state of early;

12. The E-MSC returns a 200 OK response message.

For scenario two, there is support for multiple bSRVCC compatible processes:

FIG. 6 is a first schematic flowchart of a second solution according to a preferred embodiment of the present disclosure, where the process includes:

1. The access side triggers bSRVCC switching;

2. The E-MSC sends a handover INVITE call request to the SCC_AS.

4. The remote UE returns a 200 OK response message.

7. The E-MSC returns a PRACK request message.

8, SCC_AS returns 200 OK response message;

9. Although the ringing call state has been entered at this time, the SCC_AS sends an INFO to the E-MSC, carrying the pre-alerting state;

10, E-MSC returns 200 OK response message;

11. The SCC_AS resends the 180 message to the E-MSC according to the previously recorded call status of the received 180 message;

12. The E-MSC sends an Alert message to the UE-1, and the calling user can hear the ringback tone.

FIG. 7 is a second schematic flowchart of a second solution according to a preferred embodiment of the present disclosure, where the process includes:

1. The access side triggers bSRVCC switching;

2. The E-MSC sends a handover INVITE call request to the SCC_AS.

3, because the SDP of the INVITE is the same as the original call, the SCC_AS does not need to send an UPDATE media update message to the UE-2; at this time, the UE-2 does not need to accept the UPDATE, and the backward 180 message is directly sent; the SCC_AS discards the 180. But the status of the received 180 message is received;

4, SCC_AS construction SDP is sent to the E-MSC through the 183 message;

5. The E-MSC returns a PRACK request message.

6, SCC_AS returns 200 OK response message;

7. Although the ringing call state has been entered at this time, the SCC_AS sends an INFO to the E-MSC, carrying the state of pre-alerting;

8, E-MSC returns 200 OK response message;

9. The SCC_AS retransmits the 180 message to the E-MSC according to the previously recorded call status of the received 180 message;

10. The E-MSC sends an Alert message to the UE-1, and the calling user can hear the ringback tone.

FIG. 8 is a third schematic flowchart of a second solution according to a preferred embodiment of the present disclosure, where the process includes:

1. The access side triggers bSRVCC switching;

2. The E-MSC sends a handover INVITE call request to the SCC_AS.

4. The remote UE returns a 200 OK response message.

6. The E-MSC returns a PRACK request message.

7, SCC_AS returns 200 OK response message;

8. Although the ringing call state has been entered at this time, the SCC_AS sends an INFO request message to the E-MSC, carrying the pre-alerting state;

9, E-MSC returns a 200 OK response message;

10, because the resource reservation and the like, the called party needs to wait for the completed resource reservation state to ring; the E-MSC sends an UPDATE media update message to the SCC_AS; and carries the completed resource reservation state;

11, SCC_AS forwards the UPDATE media update message to UE-2;

12, UE-2 returns a 200 OK response message;

13, SCC_AS sends a 200 OK response message to the E-MSC;

14, UE-2 sends 180 messages;

15, SCC_AS forwards 180 messages to the E-MSC;

16. The E-MSC sends an Alert message to the UE-1, and the calling user can hear the ringback tone.

Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation. Based on such understanding, portions of the technical solutions of the present disclosure that contribute substantially or to the prior art may be embodied in the form of a software product stored in a storage medium (eg, ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present disclosure.

Example 2

In the embodiment, a message sending device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

9 is a structural block diagram 1 of a message transmitting apparatus according to an embodiment of the present disclosure. As shown in FIG. 9, the apparatus includes:

a determining module 92, configured to determine that the called device is in a ringing call state after performing single radio frequency continuity SRVCC before ringing;

The sending module 94 is connected to the determining module 92, and is configured to send an acknowledgment message for confirming the SRVCC to the enhanced mobile switching center E-MSC, where the acknowledgment message carries the identifier for identifying that the calling device is in a pre-ringing state. An identification information, the first identification information is used by the E-MSC to indicate to the calling device to play a ringback tone.

With the above device, after the called device directly enters the ringing call state after the SRVCC handover occurs on the calling device, the sending module 94 sends an acknowledgment message for confirming the SRVCC to the E-MSC, where the acknowledgment message carries The first identifier information is used to identify that the calling device is in a pre-ringing state, and the first identifier information is used by the E-MSC to indicate to the calling device that the ringback tone is played, so that the called device can also be made after directly entering the ringing call state. Caller setting It is known that the calling device is in a pre-ringing state, and then the ringback tone can be played, thereby enabling the ringing tone to be played after the called device directly enters the ringing call state. Therefore, the calling device in the related art can be solved. After the SRVCC is switched, the called device directly enters the ringing call state, which causes the calling device to play the ringback tone, which improves the user experience.

In an embodiment of the present disclosure, the determining module 92 may be further configured to: when the acknowledgment message is 180, determine that the INFO message is not sent to the E-MSC before sending the acknowledgment message to the E-MSC.

In an embodiment of the present disclosure, the apparatus may further include: a first determining module, configured to: before the acknowledgment message is an INFO message, determine whether to send an acknowledgment message for confirming the SRVCC to the E-MSC The E-MSC forwards the 180 message sent by the called device. If the result of the determination is no, the sending module 94 sends an acknowledgement message to the E-MSC.

In an embodiment of the present disclosure, the apparatus may further include: a receiving module, configured to: after sending the acknowledgement message to the E-MSC, receive a response message sent by the E-MSC corresponding to the acknowledgement message; Determining whether there is second identification information indicating that the 180 message sent by the called device has been received; a constructing module, configured to construct 180 a message if it is determined that the second identification information exists; the sending module 94, further It can be used to send a constructed 180 message to the E-MSC.

It should be noted that the foregoing receiving module may be further configured to: receive, by the e-MSC, a 180 message sent by the called device before forwarding the 180 message sent by the called device to the E-MSC; the first determining module may also be used for determining Whether the response information corresponding to the INFO information sent by the E-MSC is received; the foregoing apparatus may further include: a discarding module, configured to discard the 180 message sent by the called device if the judgment result is no; the marking module, and The discarding module is configured to use the second identifier information to mark the received 180 message sent by the called device. The storage module is connected to the tag module to store the second identifier information.

In an embodiment of the present disclosure, the receiving module is further configured to: after sending an acknowledgement message to the E-MSC, receive a response message sent by the E-MSC corresponding to the acknowledgement message; the sending module 94 is further configured to update the media. Forwarding the message to the called terminal; wherein the media update message carries the resource reservation status completed by the called terminal; and after forwarding the response message corresponding to the media update message to the E-MSC, forwarding the 180 message to the E-MSC .

It should be noted that the above device may be located in the SCC_AS, but is not limited thereto.

It should be noted that each of the above modules may be implemented by software or hardware. For the latter, the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination. The forms are located in different processors.

Example 3

In the embodiment, a message sending device is also provided, which is used to implement the foregoing embodiments and preferred embodiments, and has not been described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or The implementation of a combination of software and hardware is also possible and conceived.

FIG. 10 is a structural block diagram 2 of a message sending apparatus according to an embodiment of the present disclosure. As shown in FIG. 10, the apparatus includes:

The receiving module 1002 is configured to: after the calling device performs the single radio frequency voice continuity SRVCC before ringing, when the called device is in the ringing call state, receive the acknowledgement sent by the service continuity application server SCC_AS for confirming the SRVCC. a message, where the acknowledgment message carries the first identifier information for identifying that the calling device is in a pre-ringing state, and the first identifier information is used by the E-MSC to indicate to the calling device that the ringback tone is played;

The sending module 1004 is connected to the receiving module 1002, and is configured to send, to the calling device, a ringing indication message for instructing the calling device to play the ring back tone.

After the device is in the ringing call state after the SRVCC switching occurs, the receiving module 1002 receives an acknowledgment message for confirming the SRVCC, where the acknowledgment message carries the identifier for identifying the calling party. The device is in the state of the pre-ringing state, so that the ringing tone can be played after the called device directly enters the ringing call state. Therefore, after the SRVCC switching occurs in the calling device in the related art, the called device directly Entering the ringing call state causes the problem that the calling device plays the ringback tone, which improves the user experience.

In an embodiment of the present disclosure, the apparatus may further include: a determining module, configured to determine, before the acknowledgment message sent by the SCC_AS, the INFO message sent by the SCC_AS before the acknowledgment message is 180.

It should be noted that the receiving module 1002 may be further configured to: when the acknowledgment message is an INFO message, receive the acknowledgment message sent by the SCC_AS if the 180 message sent by the called device that is forwarded by the SCC_AS has not been received.

It should be noted that the receiving module 1002 may be further configured to receive the 180 message of the SCC_AS configuration sent by the SCC_AS after receiving the acknowledgment message for confirming the SRVCC sent by the service continuity application server SCC_AS.

In an embodiment of the present disclosure, the apparatus may further include: a media update module, configured to send a response message corresponding to the acknowledgement message to the SCC_AS; and send a media update message to the called terminal by using the SCC_AS; wherein the media update message is carried in the media update message The resource reservation status completed by the called terminal; and receiving, by the SCC_AS, a response message corresponding to the media update message sent by the called terminal.

Example 4

The embodiment of the present disclosure provides a system. FIG. 11 is a structural block diagram of a system according to an embodiment of the present disclosure. As shown in FIG. 11, the system includes: a calling device 1102, a called device 1104, and an enhanced mobile switching center. E-MSC 1106 and business continuity application server SCC_AS1108; wherein

SCC_AS1108 is used to determine that the calling device 1102 is in a ringing call state after performing single radio voice continuity SRVCC before ringing; and sending an acknowledgement message to the E-MSC 1106 for confirming the SRVCC, wherein the acknowledgement message is Carrying first identification information for identifying that the calling device is in a pre-ringing state;

The E-MSC 1106 is configured to receive the acknowledgement information sent by the SCC_AS 1108 and send it to the calling device 1102 for A ringing indication message indicating that the calling device 1102 plays a ring back tone.

Through the above system, after the called device 1104 directly enters the ringing call state, the calling device 1102 can also be informed that the calling device 1102 is in a pre-ringing state, and then the ringback tone can be played, thereby causing the called device 1104 to be played. After the ringing call state is directly entered, the ringback tone can also be played. Therefore, the problem that the called device can directly enter the ringing call state after the SRVCC switching of the calling device occurs in the related art can prevent the calling device from playing the ringback tone. , to improve the user experience.

In an embodiment of the present disclosure, the foregoing SCC_AS 1108 may also be used to determine that the INFO message was not sent to the E-MSC 1106 before sending the acknowledgment message to the E-MSC 1106 if the acknowledgment message is 180.

It should be noted that, the SCC_AS 1108 may be further configured to: before sending the acknowledgment message for confirming the SRVCC to the E-MSC 1106, if the acknowledgment message is an INFO message, determine whether to forward the 180 sent by the called device to the E-MSC 1106. The message; and if the result of the determination is no, an acknowledgement message is sent to the E-MSC 1106.

It should be noted that the foregoing SCC_AS1108 may be further configured to: after sending an acknowledgment message to the E-MSC 1106, receive a response message corresponding to the acknowledgment message sent by the E-MSC 1106; determine whether there is a message indicating that the called device has received the transmission. The second identification information of the 180 message; and in the case where it is determined that the second identification information exists, the 180 message is constructed and the constructed 180 message is sent to the E-MSC 1106.

It should be noted that the foregoing SCC_AS1108 may be further configured to: before receiving the 180 message sent by the called device 1104 to the E-MSC 1106, receive the 180 message sent by the called device 1104; determine whether the E-MSC 1106 has been sent. The response information corresponding to the INFO information; and in the case that the determination result is no, the 180 message sent by the called device 1104 is discarded, and the 180 message received by the called device 1104 is marked by the second identification information, and the storage is performed. Two identification information.

Example 5

Embodiments of the present disclosure also provide a storage medium. Alternatively, in the present embodiment, the above storage medium may be set to store program code for executing the steps of the method in Embodiment 1.

Optionally, in this embodiment, the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory. A variety of media that can store program code, such as a disc or a disc.

Optionally, in the embodiment, the processor performs the steps of the method in Embodiment 1 according to the stored program code in the storage medium.

Optionally, specific examples in this embodiment may refer to the descriptions in the foregoing embodiments and optional implementation manners. For example, the embodiment is not described herein again.

It will be apparent to those skilled in the art that the various modules or steps of the present disclosure described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. As such, the disclosure is not limited to any specific combination of hardware and software.

The above description is only a preferred embodiment of the present disclosure, and is not intended to limit the disclosure, and various changes and modifications may be made to the present disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present disclosure are intended to be included within the scope of the present disclosure.

Industrial applicability

The present disclosure provides a message sending method and apparatus, and a system for determining that a calling device performs a single radio frequency voice continuity SRVCC handover before ringing, the called device is in a ringing call state, and is sent to the enhanced mobile switching center E-MSC for Confirming the confirmation message of the SRVCC, wherein the confirmation message carries the first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used by the E-MSC to indicate to the calling device that the ringback tone is played, thereby solving the problem. In the related art, after the SRVCC handover occurs on the calling device, the called device directly enters the ringing call state, which causes the calling device to play the ringback tone, thereby achieving the effect of improving the user experience.

Claims

A method for sending a message, comprising:

Determining that the calling device performs a single radio frequency voice continuity SRVCC switch before ringing, the called device is in a ringing call state;

Sending an acknowledgment message for confirming the SRVCC to the enhanced mobile switching center E-MSC, where the acknowledgment message carries first identification information for identifying that the calling device is in a pre-ringing state, the first identifier The information is used by the E-MSC to indicate to the calling device to play a ring back tone.
The method of claim 1, wherein the confirmation message comprises one of: 180 messages and INFO messages.
The method of claim 2, wherein, in the case that the confirmation message is the 180 message, the method further comprises:

Determining that the INFO message was not sent to the E-MSC prior to transmitting the acknowledgement message to the E-MSC.
The method according to claim 2, wherein, in the case that the acknowledgment message is the INFO message, before the acknowledgment message for confirming the SRVCC is sent to the E-MSC, the method further includes:

Determining whether the 180 message sent by the called device is forwarded to the E-MSC;

If the determination result is no, the confirmation message is sent to the E-MSC.
The method of claim 4, wherein after the sending the acknowledgement message to the E-MSC, the method further comprises:

Receiving a response message corresponding to the acknowledgement message sent by the E-MSC;

Determining whether there is second identification information indicating that the 180 message sent by the called device has been received;

In the event that it is determined that the second identification information is present, the message is constructed 180 and the constructed 180 message is sent to the E-MSC.
The method of claim 5, wherein the method further comprises: before determining whether to forward the 180 message sent by the called device to the E-MSC, the method further comprising:

Receiving 180 messages sent by the called device;

Determining whether the response information corresponding to the INFO information sent by the E-MSC is received;

If the judgment result is negative, the 180 message sent by the called device is discarded, and the second identifier information is used to mark the 180 message sent by the called device, and the second identifier information is stored.
The method of claim 4 wherein said party after said acknowledgment message is sent to said E-MSC The law also includes:

Receiving a response message corresponding to the acknowledgement message sent by the E-MSC;

Transmitting a media update message to the called terminal, where the media update message carries a resource reservation status completed by the called terminal;

After forwarding the response message corresponding to the media update message to the E-MSC, the 180 message is forwarded to the E-MSC.
The method of claim 1 wherein said first identification information is carried by an extensible markup voice XML structure.
A message sending method, comprising:

After the calling device performs the single radio frequency voice continuity SRVCC before ringing, the called device is in the ringing call state, and receives a confirmation message sent by the service continuity application server SCC_AS for confirming the SRVCC; The acknowledgment message carries first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used by the enhanced mobile switching center E-MSC to indicate to the calling device to play a ringback tone. ;

And transmitting, to the calling device, a ringing indication message for instructing the calling device to play a ringback tone.
The method of claim 9, wherein the confirmation message comprises one of: 180 messages and INFO messages.
The method of claim 10, wherein, in the case that the confirmation message is the 180 message, the method further comprises:

Determining that the INFO message sent by the SCC_AS has not been received before the acknowledgement message sent by the SCC_AS.
The method according to claim 10, wherein, in the case that the acknowledgement message is the INFO message, the acknowledgement message sent by the service continuity application server SCC_AS for confirming the SRVCC includes:

If the 180 message sent by the called device forwarded by the SCC_AS is not received, the acknowledge message sent by the SCC_AS is received.
The method of claim 12, wherein after receiving the acknowledgment message sent by the service continuity application server SCC_AS for confirming the SRVCC, the method further comprises:

Receiving 180 messages of the SCC_AS configuration sent by the SCC_AS.
The method of claim 13, wherein before receiving the 180 message of the SCC_AS configuration sent by the SCC_AS, the method further comprises:

Sending a response message corresponding to the acknowledgement message to the SCC_AS;

Sending, by the SCC_AS, a media update message to the called terminal, where the media update message carries a resource reservation status completed by the called terminal;

Receiving, by the SCC_AS, a response message that is sent by the called terminal and corresponding to the media update message.
The method of claim 9 wherein said first identification information is carried by an extensible markup voice XML structure.
A message sending device, comprising:

Determining a module, configured to determine that the called device is in a ringing call state after performing single radio voice continuity SRVCC before ringing;

a sending module, configured to send an acknowledgment message for confirming the SRVCC to the enhanced mobile switching center E-MSC, where the acknowledgment message carries first identifier information for identifying that the calling device is in a pre-ringing state, The first identifier information is used by the E-MSC to indicate to the calling device that a ringback tone is played.
The apparatus of claim 16, wherein the confirmation message comprises one of: 180 messages and INFO messages.
The apparatus according to claim 17, wherein the determining module is further configured to: determine that the acknowledgement message is not sent before sending the acknowledgement message to the E-MSC, in the case that the acknowledgement message is the 180 message The E-MSC sends the INFO message.
The apparatus of claim 17 wherein said apparatus further comprises:

a first judging module, configured to determine whether to forward the acknowledgment message to the E-MSC before sending the acknowledgment message for confirming the SRVCC to the E-MSC, where the acknowledgment message is the INFO message The 180 message sent by the called device; wherein, if the determination result is no, the sending module sends the acknowledgement message to the E-MSC.
The device according to claim 19, wherein the device further comprises: a receiving module, configured to receive, after transmitting the acknowledgement message to the E-MSC, a corresponding to the acknowledgement message sent by the E-MSC a second response module, configured to determine whether there is second identification information indicating that the 180 message sent by the called device has been received; and the constructing module is configured to determine that the second identification information exists In the case of a 180 message, the sending module is further configured to send the constructed 180 message to the E-MSC.
The apparatus according to claim 20, wherein said receiving module is further configured to receive 180 messages sent by said called device before determining whether to forward 180 messages sent by said called device to said E-MSC The first determining module is further configured to determine whether the response information corresponding to the INFO information sent by the E-MSC is received, and the device further includes: a discarding module, configured to be in the case that the determining result is no Discarding the sent by the called device a message that is set to store the 180 message sent by the called device by using the second identifier information, and a storage module configured to store the second identifier information.
The apparatus of claim 16 wherein said first identification information is carried by an extensible markup voice XML structure.
A message sending device includes:

The receiving module is configured to: after the calling device performs the single radio frequency voice continuity SRVCC before ringing, when the called device is in the ringing call state, receive the acknowledge message sent by the service continuity application server SCC_AS for confirming the SRVCC The acknowledgment message carries first identification information for identifying that the calling device is in a pre-ringing state, and the first identification information is used by the enhanced mobile switching center E-MSC to the calling device. Instructing to play a ringback tone;

And a sending module, configured to send, to the calling device, a ringing indication message for instructing the calling device to play a ringback tone.
The apparatus of claim 23, wherein the confirmation message comprises one of: 180 messages and INFO messages.
The device of claim 24, wherein the device further comprises:

a determining module, configured to determine that the INFO message sent by the SCC_AS has not been received before the acknowledgement message sent by the SCC_AS, in the case that the acknowledgement message is the 180 message.
The apparatus according to claim 24, wherein said receiving module is further configured to: in the case where said acknowledgment message is said INFO message, 180 is not received by said called device forwarded by said SCC_AS In the case of a message, the acknowledgement message sent by the SCC_AS is received.
The apparatus according to claim 26, wherein the receiving module is further configured to, after receiving an acknowledgment message for confirming the SRVCC sent by the service continuity application server SCC_AS, receive the 180 of the SCC_AS configuration sent by the SCC_AS Message.
The apparatus of claim 23 wherein said first identification information is carried by an extensible markup voice XML structure.
A system comprising: a calling device, a called device, an enhanced mobile switching center E-MSC, and a service continuity application server SCC_AS;

Setting the SCC_AS to determine that the calling device performs a single radio frequency voice continuity SRVCC before ringing, the called device is in a ringing call state; and sending an acknowledgement message to the E-MSC for confirming the SRVCC The acknowledgment message carries first identifier information for identifying that the calling device is in a pre-ringing state;

The E-MSC is configured to receive the acknowledgement information sent by the SCC_AS, and send a ringing indication message to the calling terminal to instruct the calling device to play a ringback tone.
The system of claim 29, wherein the confirmation message comprises one of: 180 messages and INFO messages.
The system according to claim 30, wherein said SCC_AS is further arranged to determine that said acknowledgment message is not sent to said E-MSC before said acknowledgment message is said 180 message The E-MSC sends the INFO message.
The system according to claim 30, wherein said SCC_AS is further arranged to, before said acknowledgment message is said INFO message, before said acknowledgment message for confirming SRVCC is sent to said E-MSC, Determining whether the 180 message sent by the called device is forwarded to the E-MSC; and if the determination result is no, sending the acknowledgement message to the E-MSC.
The system according to claim 32, wherein the SCC_AS is further configured to: after transmitting the acknowledgement message to the E-MSC, receive a response message sent by the E-MSC corresponding to the acknowledgement message; Determining whether there is second identification information indicating that the 180 message sent by the called device has been received; and in the case of determining that the second identification information exists, constructing a message 180 and sending the message to the E-MSC Constructed 180 messages.
The system of claim 33, wherein the SCC_AS is further configured to receive the 180 message sent by the called device before determining whether to forward the 180 message sent by the called device to the E-MSC. Determining whether the response information corresponding to the INFO information sent by the E-MSC is received; and if the determination result is no, discarding the 180 message sent by the called device, and adopting the second identification information The tag receives the 180 message sent by the called device, and stores the second identifier information.