CN102137361B - Method, device and system for realizing inter-system call control - Google Patents

Abstract

A method, device and system for implementing call control between different systems; the method includes: receiving a first paging message sent by an MSC, and sending a second paging message to a called terminal through a data network; receiving the called terminal when receiving After the first paging response returned after the second paging message, send the second paging response to the MSC; after receiving the resource allocation request message sent by the MSC after receiving the second paging response, send the resource allocation request message to the MSC Return a resource allocation complete message; return an answer or refuse answer message to the MSC according to the selection of the called user. By adopting the method, device and system of the embodiment of the present invention, it is possible to avoid the erroneous judgment that the MSC is not in the service area due to the failure of the MSC to receive the paging response in time, improve the communication efficiency, and at the same time enable the calling party to hear the paging response normally. Ringtones, improved user experience.

Description

A method, device and system for implementing call control between different systems

technical field

The present invention relates to the technical field of mobile communication, in particular to a method, device and system for realizing inter-system call control.

Background technique

At present, with the rapid development of mobile communication technology, high data rate (High Data Rate, HDR) technology and long-term evolution (Long Term Evolution, LTE) technology are becoming more and more mature; among them, HDR technology can also be called high-rate packet data (High Data Rate). Rate Packet Data, HRPD) or 1x EV-DO, and 1x EV-DO has been accepted as one of the 3G technical standards, hereinafter referred to as EV-DO. However, since both EV-DO and LTE only support data services, that is, there are only packet domains and no circuit domains, so for terminals that support LTE or EV-DO networks, the methods usually used to implement voice calls are: 1. Use packet-based Domain VoIP service, that is, voice data is transmitted in the packet domain; 2. Use dual-mode or multi-mode terminals that support both circuit domain services and packet domain services, and use LTE or EV-DO network for data services. For voice services Then use a network supporting circuit domain services to bear, for example, use a CDMA (Code Division Multiple Access, Code Division Multiple Access) 2000lx (abbreviated as 1X) network to bear.

Although the second method can provide data and voice services very well, when the terminal resides in LTE or EV-DO, if there is a voice call to call the user, how to pass the paging information to the terminal becomes a must. To solve the problem; and for this problem, cross-paging is generally used to solve it, that is, if the terminal is working on the LTE network, if there is a voice call, the paging information will be sent to the terminal through the LTE packet data network , so that the terminal switches to the 1X network for voice services; if the terminal works on the EV-DO network, the situation is similar.

However, in the current cross-paging process, the paging response message will be returned only after the user chooses to answer, and a release order (Release Order) will be sent when the user refuses to answer; but MSC (Mobile Switching Center, mobile Switching Center) will start the timer after sending out the paging message, and because the terminal will reply the paging response only after the user chooses to answer, the MSC cannot receive the paging response within the time specified by the timer , so it is judged that the terminal is not in its service area, which seriously affects the communication quality and causes unnecessary communication interruption; in addition, since the called terminal decides to send a paging response message according to the user's choice after receiving the paging message Or release the command, but the MSC will not return the ringback tone to the calling party after sending the paging message and starting the timer. Whether the user answers or not, after the called user is paged, the calling user will not receive the ring-back tone, which also seriously affects the user experience.

Contents of the invention

Embodiments of the present invention provide a method, device and system for implementing call control between different systems, which can avoid the wrong judgment that the MSC is not in the service area because the MSC does not receive the paging response in time, and can also make the calling party normal A ringback tone is heard.

In order to solve the above problems, the technical solutions provided by the embodiments of the present invention are as follows:

A method for implementing call control between different systems, the method comprising:

receiving the first paging message sent by the mobile switching center MSC, and sending the second paging message to the called terminal through the data network;

receiving the first paging response returned by the called terminal after receiving the second paging message, and sending the second paging response to the MSC;

After receiving the resource allocation request message sent by the MSC after receiving the second paging response, return a resource allocation complete message to the MSC;

Return an answer or reject message to the MSC according to the called user's choice, and when the called user chooses to answer, instruct the called terminal to switch to the voice network and assign the corresponding service channel.

A device for implementing call control between different systems, the device comprising: a first processing unit, a second processing unit, a third processing unit, and a fourth processing unit; wherein,

The first processing unit is configured to send a second paging message to the called terminal through the data network after receiving the first paging message sent by the MSC;

The second processing unit is configured to receive a first paging response returned by the called terminal after receiving the second paging message, and send a second paging response to the MSC;

The third processing unit is configured to return a resource allocation complete message to the MSC after receiving the resource allocation request message sent by the MSC after receiving the second paging response;

The fourth processing unit is used to return an answer or reject message to the MSC according to the selection of the called user, and when the called user chooses to answer, instruct the called terminal to switch to the voice network, and assign the corresponding traffic channel.

A terminal, comprising: a receiving unit, a sending unit, and a switching unit; wherein the receiving unit is configured to receive a paging message and a switching command, and notify the sending unit or the switching unit;

The sending unit is used to send a paging response according to the notification of the receiving unit, and send an answer message when the user chooses to answer the voice call;

The switching unit is configured to switch the terminal to the voice network according to the switching command notified by the receiving unit.

A system for realizing call control between different systems, including a mobile switching center MSC, the system also includes: an interoperable module and a mobile terminal; wherein,

The MSC is configured to send a first paging message to the interoperation module, and after receiving the second paging response returned by the interoperation module, send a resource allocation request to the interoperation module, and then receive the The resource allocation completion message returned by the interoperability module;

The interoperability module is configured to send a second paging message to the called mobile terminal through the data network after receiving the first paging message, and send a message to the MSC after receiving the first paging response returned by the called mobile terminal. Send a second paging response, and return a resource allocation completion message after receiving the resource allocation request, and then return an answer or refuse to answer message to the MSC according to the selection of the called user, and when the called user chooses to answer After that, instruct the called terminal to switch to the voice network and assign the corresponding traffic channel;

The called mobile terminal is used to return the first paging response after receiving the second paging message, and return an answer or reject message to the interoperation module according to the selection of the called user, and according to the interoperation module The switch command switches to the voice network.

It can be seen that by adopting the method, device and system of the embodiment of the present invention, after paging the called terminal located on the data network, no matter whether the called user chooses to answer or not, the paging response will be returned to the MSC, which can avoid the MSC The erroneous judgment of not being in the service area due to the failure to receive the paging response in time improves the communication efficiency of the voice call; at the same time, due to the timely return of the paging response, the MSC can return the ringback tone to the calling party in time , so as to further improve the user experience; in addition, through the information interaction between IWS and MSC on resource allocation, it is also possible not to make changes to existing processes and systems, thereby achieving better compatibility with existing systems and processes .

Description of drawings

FIG. 1 is a schematic flowchart of a method for implementing call control between different systems according to Embodiment 1 of the present invention;

FIG. 2 is a schematic flow diagram of a method including a hard handover procedure in the method for implementing call control between different systems according to Embodiment 1 of the present invention;

FIG. 3 is a schematic flow diagram of another method including a hard handover procedure in the method for implementing call control between different systems according to Embodiment 1 of the present invention;

FIG. 4 is a schematic structural diagram of a device for implementing call control between different systems according to Embodiment 2 of the present invention;

FIG. 5 is a schematic diagram of a terminal structure according to Embodiment 3 of the present invention.

Detailed ways

In order to facilitate better understanding of those skilled in the art, detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

Embodiment 1 of the present invention provides a method for implementing call control between different systems. The terminal involved in the method of this embodiment resides on a data network, such as LTE or EV-DO, etc., but is not limited thereto; and The terminal has successfully pre-registered in the circuit domain of 1x through IWS (interoperability module), and the terminal can be in a connected state or an idle state; as shown in Figure 1, the method includes:

Step 101: After receiving the voice call initiated by the calling user, the MSC judges whether the called user terminal of the voice call is in its service area, and if so, sends a paging message to the IWS where the called user terminal is located, At the same time, the MSC starts a timer; wherein, if the MSC does not receive a paging response before the timer expires, the MSC determines that the called user is not in the service area, and therefore makes a decision that the called user cannot be paged. judgment;

In addition, when the MSC sends a paging message to the IWS, it can also send the calling number to the IWS; of course, in order to improve the paging success rate, the At the same time, it can also send a paging message to 1x BS;

Step 102: After receiving the paging message sent by the MSC, the IWS sends a paging message to the called terminal through the data network; in addition, if the IWS also receives the paging message sent by the MSC the calling number, the IWS sends the calling number together with the paging message to the called terminal when sending a paging message to the called terminal;

Step 103: After receiving the paging message sent by the IWS, the called terminal sends a paging response (Paging Response) message to the IWS regardless of whether the user chooses to answer; When receiving the paging message and also receiving the calling number, the called terminal starts to ring, prompting the user that there is an incoming call and displaying the calling number;

Step 104: After receiving the paging response message returned by the terminal, the IWS sends a paging response to the MSC;

Step 105: After receiving the paging response sent by the IWS, the MSC stops the timer, and at the same time sends an Assignment Request (Assignment Request) message to the IWS to request allocation of corresponding resources for this voice call; in addition, After receiving the paging response, the MSC may return a ringback tone to the calling party, indicating that the called user has been paged;

Step 106: After receiving the assignment request message, the IWS directly returns an assignment complete (Assignment Complete) message to the MSC; in addition, after receiving the assignment request message, the IWS may also send an assignment complete message to the MSC. The called terminal sends a ringing message carrying the calling number;

Step 107: If the MSC does not return a ring-back tone to the calling party after receiving the paging response, it may return a ring-back tone to the calling party after receiving the allocation completion message, indicating that it has been paged the called user;

It is worth noting that, in the existing call flow, the MSC usually sends an Assignment Request message to the 1XBS to request allocation of corresponding resources for the call, and when the 1XBS establishes a service channel with the terminal, the 1XBS Only then will the assignment complete (Assignment Complete) message be returned to the MSC; and in the embodiment of the present invention, after the MSC receives the paging response, it sends an Assignment Request to the IWS to request that the voice call allocate corresponding resources, and the IWS directly returns the allocation completion message to the MSC after receiving the allocation request message; through this method of this embodiment, the existing process and system may not be changed, thereby Better compatibility with existing systems and processes has been achieved.

Step 108: If the called user chooses to answer the voice call, the called terminal returns an answer message to the IWS; if the called user rejects the voice call, the called terminal returns a rejection message to the IWS;

Step 109: When the IWS receives the answer message from the called terminal, it returns an answer message to the MSC; when the IWS receives the rejection message from the called terminal, it returns a message to the MSC. reject message;

Step 110: After receiving the answering message sent by the called terminal, the IWS sends a switching command to the called terminal, instructing the called terminal to switch to the 1x air interface, and assign the corresponding traffic channel;

Wherein, as shown in FIG. 2 and FIG. 3, the present embodiment proposes that the above method may also include:

Step 111: After the IWS returns the allocation completion message to the MSC or after receiving the answer message sent by the called terminal, it applies for a voice call service channel resource for the called terminal; specifically, the called terminal Applying for voice call service channel resources includes but is not limited to: IWS initiates a hard handover process between Base Station Controllers (BSCs), or when the IWS and 1xBS are in the same device, the 1xBS where the IWS is located directly allocates service channel resources ; Among them, the specific hard handover process may include but not limited to:

S1: the IWS sends a handover request to the MSC;

S2: After receiving the handover request sent by the IWS, the MSC sends a handover request to the 1XBS;

S3: After the 1XBS allocates corresponding resources for the current call, it returns a handover request confirmation to the MSC;

S4: The MSC sends a handover command to the IWS after receiving the handover request confirmation;

In addition, after the terminal is switched to the 1X air interface, the IWS can also send a switching start message to the MSC, and the voice call process has been completed.

It can be seen that, through the methods of the above-mentioned embodiments, after paging to the called terminal located in the data network, no matter whether the called user chooses to answer or not, the paging response will be returned to the MSC, which can avoid the problem caused by the MSC not receiving it in time. The wrong judgment that the paging response is not in the service area improves the communication efficiency of the voice call; at the same time, because the paging response is returned in time, the MSC can return the ringback tone to the calling party in time, thereby further The user experience is improved; in addition, through the information exchange on resource allocation between IWS and MSC, no changes to existing processes and systems can be made, thereby achieving better compatibility with existing systems and processes.

Based on the above ideas, Embodiment 2 of the present invention proposes a device for implementing inter-system call control. As shown in FIG. 4 , the device 400 includes: a first processing unit 401, a second processing unit 402, and a third processing unit 403 and the fourth processing unit 404; wherein,

The first processing unit 401 is configured to send a second paging message to the called terminal through the data network after receiving the first paging message sent by the MSC;

The second processing unit 402 is configured to receive a first paging response returned by the called terminal after receiving the second paging message, and send a second paging response to the MSC;

The third processing unit 403 is configured to return a resource allocation complete message to the MSC after receiving the resource allocation request message sent by the MSC after receiving the second paging response;

The fourth processing unit 404 is configured to return an answer or refuse answer message to the MSC according to the selection of the called user, and when the called user chooses to answer, instruct the called terminal to switch to the voice network, and assign the corresponding business channel.

In addition, the device may further include: a fifth processing unit 405, configured to apply for a voice call for the called terminal after the third processing unit returns a resource allocation complete message to the MSC or after the called user chooses to answer the call. Call traffic channel resource.

Wherein, when the device and the 1xBS are in the same equipment, the 1xBS where the device is located directly allocates traffic channel resources; and when the device is an independent module, the fifth processing unit may also include: a sending module and a receiving module module; among them,

The sending module is used to send a handover request to the MSC; the receiving module is used to receive a handover command returned by the MSC; wherein, the handover command is: the MSC sends a handover request to the base station and transmits a handover request at the base station Returned after confirming that the corresponding resource has been allocated for the current call.

In addition, Embodiment 3 of the present invention proposes a terminal. As shown in FIG. 5, the terminal 500 includes: a receiving unit 501, a sending unit 502, and a switching unit 503; wherein the receiving unit 501 is used to receive paging messages and a switching command, and notify the sending unit 502 or the switching unit 503;

The sending unit 502 is configured to send a paging response according to the notification from the receiving unit 501, and send an answer message when the user chooses to answer the voice call;

The switching unit 503 is configured to switch the terminal to the voice network according to the switching command notified by the receiving unit 501 .

It should be noted that those skilled in the art can easily understand that the device and terminal for inter-system call control described in the above embodiments can also exist as a part of the system, and the system performs information interaction with the MSC to implement The functions consistent with the descriptions in the above embodiments, therefore, the system including the device for implementing inter-system call control and the mobile terminal in the above embodiments should also be included in the scope of protection of this application, and will not be repeated here.

Professionals can further realize that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, computer software or a combination of the two. In order to clearly illustrate the hardware and software In the above description, the components and steps of each example have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art may use different methods to implement the described functions for each specific application, but such implementation should not be regarded as exceeding the scope of the embodiments of the present invention.

The steps of the methods or algorithms described in connection with the embodiments disclosed herein may be directly implemented by hardware, software modules executed by a processor, or a combination of both. Software modules can be placed in random access memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other Any other known storage medium.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the embodiments of the invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present invention . Therefore, the embodiments of the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

The above descriptions are only preferred embodiments of the embodiments of the present invention, and are not intended to limit the embodiments of the present invention. Any modifications, equivalent replacements, improvements, etc. within the spirit and principles of the embodiments of the present invention are It should be included in the protection scope of the embodiments of the present invention.

Claims (10)

1. A method for implementing call control between different systems is characterized in that the method comprises the following steps:

receiving a first paging message sent by a Mobile Switching Center (MSC), and sending a second paging message to a called terminal through a data network;

receiving a first Paging Response (Paging Response) returned by the called terminal after receiving the second Paging message, and sending a second Paging Response (Paging Response) to the MSC;

after receiving a resource allocation request message sent by the MSC after receiving a second Paging Response (Paging Response), returning a resource allocation completion message to the MSC;

and returning a message of answering or refusing to answer to the MSC according to the selection of the called user, and indicating the called terminal to be switched to the voice network and allocating a corresponding service channel after the called user selects to answer.

2. The method of claim 1, further comprising: and after a resource allocation completion message is returned to the MSC or after the called user selects to answer, applying for voice call service channel resources for the called terminal.

3. The method of claim 2, wherein applying for voice call traffic channel resources for the called terminal comprises: and initiating a hard switching process between the base station controllers or directly distributing service channel resources.

4. The method of claim 3, wherein initiating the hard handoff procedure between the BSC's comprises:

sending a switching requirement to the MSC and receiving a switching command returned by the MSC; wherein the received handover command is: and the MSC sends a switching request to the base station and returns the switching request after the base station confirms that the corresponding resources are allocated to the current call.

5. The method of claim 2, further comprising:

if receiving the calling number sent by MSC, sending a second paging message containing the calling number to the called terminal through data network, or sending a ringing message carrying the calling number to the called terminal after receiving the allocation request message.

6. An apparatus for implementing call control between different systems, the apparatus comprising: the system comprises a first processing unit, a second processing unit, a third processing unit and a fourth processing unit; wherein,

the first processing unit is used for sending a second paging message to the called terminal through a data network after receiving the first paging message sent by the MSC;

the second processing unit is configured to receive a first Paging Response (Paging Response) returned by the called terminal after receiving the second Paging message, and send a second Paging Response (Paging Response) to the MSC;

the third processing unit is configured to return a resource allocation completion message to the MSC after receiving a resource allocation request message sent by the MSC after receiving a second paging response (pagengresponse);

the fourth processing unit is used for returning a message of answering or refusing to answer to the MSC according to the selection of the called user, and indicating the called terminal to be switched to the voice network and allocating a corresponding service channel after the called user selects to answer.

7. The apparatus of claim 6, further comprising: a fifth processing unit, configured to apply for voice call service channel resources for the called terminal after the third processing unit returns a resource allocation completion message to an MSC or after the called user selects to answer.

8. The apparatus of claim 7, wherein the fifth processing unit comprises: a transmitting module and a receiving module; wherein,

the sending module is used for sending a switching requirement to the MSC;

the receiving module is used for receiving a switching command returned by the MSC; wherein the switching command is: and the MSC sends a switching request to the base station and returns the switching request after the base station confirms that the corresponding resources are allocated to the current call.

9. A terminal, comprising: a receiving unit, a transmitting unit and a switching unit;

the receiving unit is used for receiving paging messages and switching commands sent by an interworking solution (IWS) and notifying the sending unit or the switching unit;

the sending unit is used for sending paging response to the IWS according to the notification of the receiving unit and sending answering information to the IWS when a user selects to answer the voice call;

the switching unit is used for switching the terminal to a voice network according to the switching command notified by the receiving unit.

10. A system for implementing call control between different systems, comprising a mobile switching center MSC, the system further comprising: an interoperation module and a mobile terminal; wherein,

the MSC is used for sending a first Paging message to the interoperation module, sending a resource allocation request to the interoperation module after receiving a second Paging Response (Paging Response) returned by the interoperation module, and then receiving a resource allocation completion message returned by the interoperation module;

the interoperation module is used for sending a second Paging message to the called mobile terminal through a data network after receiving the first Paging message, sending a second Paging Response (Paging Response) to the MSC after receiving a first Paging Response (Paging Response) returned by the called mobile terminal, returning a resource allocation completion message after receiving the resource allocation request, then returning a receiving or rejecting receiving message to the MSC according to the selection of the called user, and indicating the called terminal to be switched to a voice network and allocating a corresponding service channel after the called user selects to receive;

the called mobile terminal is used for returning a first paging response (paging response) after receiving the second paging message, returning a message of answering or refusing to answer to the interoperation module according to the selection of the called user, and switching to a voice network according to a switching command of the interoperation module.