CN109327870B - Method, device and equipment for communicating with ATCF (advanced telecom computing framework) and computer storage medium - Google Patents
Method, device and equipment for communicating with ATCF (advanced telecom computing framework) and computer storage medium Download PDFInfo
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- CN109327870B CN109327870B CN201710647708.XA CN201710647708A CN109327870B CN 109327870 B CN109327870 B CN 109327870B CN 201710647708 A CN201710647708 A CN 201710647708A CN 109327870 B CN109327870 B CN 109327870B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
- H04W36/0022—Control or signalling for completing the hand-off for data sessions of end-to-end connection for transferring data sessions between adjacent core network technologies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
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Abstract
The embodiment of the invention discloses a method, a device and equipment for communicating with an ATCF (advanced telecom computing framework), and a computer storage medium. The method is used for transferring the I-CSCF and comprises the following steps: receiving an SRVCC switching request sent by an SRVCC IWF, wherein the SRVCC switching request information comprises user information of a user; inquiring a service call session control function (S-CSCF) registered by a user based on the user information; sending ATCF request information to S-CSCF, wherein the ATCF request information comprises user information; receiving ATCF request response information sent by the S-CSCF, wherein the ATCF request response information comprises ATCF information; and sending the SRVCC switching request to the ATCF according to the ATCF information. The embodiment of the invention can solve the problem that the target SRVCC IWF can not determine the ATCF providing the voice service for the user, which causes the interruption of the voice service when the user switches the SRVCC.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, a device, and a computer storage medium for communicating with an Access Transfer Control Function (ATCF).
Background
Voice Over LTE (VOLTE) is an Internet Protocol (IP) data transmission technology for interconnection between networks, and all services thereof are carried on a Long Term Evolution (LTE) network, so that not only is a high-speed data service provided, but also a high-quality audio/video call is provided, and more VOLTE users use the VOLTE Voice service at present. However, for some areas without LTE network coverage, voice service needs to be implemented through 2/3G network, so when VoLTE user moves from LTE network to 2/3G network, handover is needed to ensure that user can use voice service normally.
The Single Radio Voice Call Continuity (SRVCC) handover refers to a service in which a VoLTE user keeps a Call uninterrupted by an access network handover process of user equipment and network equipment when the VoLTE user moves from an LTE network to an 2/3G network during the Call. When the user moves from the original LTE network to the 2/3G network, the SRVCC switching can be executed. In the SRVCC handover process, a Mobility Management Entity (MME) of the original LTE network may select a target SRVCC Interworking Function (Interworking Function IWF) for the 2/3G network after the handover of the user, and send user information and a session transfer number (STN-SR) to the target SRVCC IWF through a circuit switching Request PS to CS Request information that is packet-switched. STN-SR can mark the ATCF of the network protocol Multimedia Subsystem (IP Multimedia Subsystem, IMS) network providing the voice service for the user, after the target SRVCC IWF establishes the network bearing with the network after the user is switched, the ATCF providing the voice service for the user is determined by analyzing and recognizing the STN-SR, and then the bearing with the ATCF can be established, the ATCF can continue providing the voice service for the user through the bearing established with the target SRVCC IWF, thereby the user keeps the call uninterrupted during the network switching.
In a normal situation, the SRVCC IWF and the ATCF are both located in the same local network or the same province, so the target SRVCC IWF can determine the ATCF providing the voice service for the user by recognizing the STN-SR. However, if the ATCF corresponding to the STN-SR does not belong to the same network as the target SRVCC IWF, the target SRVCC IWF cannot recognize the STN-SR. For example, when a user in a VoLTE call moves from a local network to a network in an adjacent area, the MME switches to an MME of the network in the adjacent area, but the IMS domain does not switch, so the user still uses a voice service provided by an ATCF in the original local network, the MME of the network in the adjacent area stores an STN-SR of the ATCF in the original local network, the user is still registered on the ATCF in the original local network, and if an SRVCC handover occurs at this time, the STN-SR provided by the MME for a target SRVCC IWF is the STN-SR of the ATCF in the original local network, and does not belong to the same network as the target SRVCC IWF.
The target SRVCC IWF cannot recognize STN-SR, which results in that it cannot determine the ATCF providing the voice service for the user, and further results in that the target SRVCC IWF cannot establish a bearer with the ATCF, and the ATCF cannot provide the voice service for the user, so that the voice service is interrupted when the user switches SRVCC.
Disclosure of Invention
The embodiment of the invention provides a method, a device, equipment and a computer storage medium for communicating with an ATCF (advanced telecom computing environment), which can solve the problem that a target SRVCC IWF cannot determine the ATCF for providing a voice service for a user, so that the voice service is interrupted when the SRVCC is switched.
In a first aspect, an embodiment of the present invention provides a method for communicating with an ATCF, where the method is used for forwarding an inquiry Call Session Control Function (I-CSCF), and the method includes:
receiving an SRVCC switching Request sent by an SRVCC IWF, wherein the SRVCC switching Request information comprises user information of a user, and the SRVCC switching Request information is generated by responding to PS to CS Request information received by the SRVCC IWF;
inquiring a service Call Session Control Function (S-CSCF) registered by the user based on the user information;
sending ATCF request information to S-CSCF, wherein the ATCF request information comprises user information and is used for requesting ATCF for providing voice service for the user;
receiving ATCF request response information sent by the S-CSCF, wherein the ATCF request response information comprises ATCF information;
and sending the SRVCC switching request to the ATCF according to the ATCF information.
In a second aspect, an embodiment of the present invention provides a device for communicating with an ATCF, where the device is disposed in a transit I-CSCF, and the device includes:
a receiving unit, configured to receive an SRVCC handover Request sent by an SRVCC IWF, where the SRVCC handover Request information includes user information of a user, and the SRVCC handover Request information is generated in response to PS to CS Request information received by the SRVCC IWF;
the query unit is used for querying the S-CSCF registered by the user based on the user information;
a sending unit, configured to send ATCF request information to the S-CSCF, where the ATCF request information includes user information, and the ATCF request information is used to request an ATCF that provides a voice service for a user;
the receiving unit is further configured to receive ATCF request response information sent by the S-CSCF, where the ATCF request response information includes ATCF information;
the receiving unit is further configured to send an SRVCC handover request to the ATCF according to the information of the ATCF.
In a third aspect, an embodiment of the present invention provides a transit I-CSCF, including:
a memory, a processor, a communication interface, and a bus;
the memory, the processor and the communication interface are connected through a bus and complete mutual communication;
the memory is used for storing program codes;
the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory for performing the method as described in the first aspect.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, which is characterized by instructions, when the instructions are executed on a computer, the computer is caused to execute the method according to the first aspect.
In the embodiment of the invention, in the SRVCC switching process, a transfer I-CSCF receives an SRVCC switching Request sent by an SRVCC IWF after receiving a PS to CS Request, the switching Request comprises user information, the transfer I-CSCF can find an S-CSCF registered by a user based on the user information, and determines an ATCF providing voice service for the user through the S-CSCF, and then forwards the SRVCC switching Request sent by the SRVCC IWF to the ATCF. Therefore, in the SRVCC switching process, the SRVCC IWF can not identify the STN-SR after receiving the PS to CS Request, but addresses and routes to the corresponding ATCF through the transfer I-CSCF, and forwards the information that the SRVCC IWF needs to be sent to the ATCF, thereby realizing the communication between the SRVCC IWF and the ATCF in the SRVCC switching process, ensuring the completion of the SRVCC switching process, avoiding the problem that the SRVCC IWF can not identify the STN-SR to cause the SRVCC IWF to be unable to determine the ATCF providing the voice service for the user, and further causing the target SRVCC IWF to be unable to establish the load with the ATCF, ensuring that the ATCF can provide the voice service for the user, and the voice service of the user can not be interrupted during SRVCC switching.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram of a method of communicating with an ATCF provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic flow chart diagram of a method of communicating with an ATCF provided in accordance with yet another embodiment of the present invention;
FIG. 3 is a schematic block diagram of an apparatus for communicating with an ATCF provided in accordance with an embodiment of the present invention;
fig. 4 is a schematic block diagram of an apparatus for communicating with an ATCF provided in accordance with an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The embodiment of the invention is used for a scene that a user uses VoLTE to carry out switching of voice service from an LTE network to an 2/3G network. In the embodiment of the invention, the transfer I-CSCF is arranged between the SRVCC IWF of the network element and the ATCF of the network element, when the SRVCC IWF needs to address and route the ATCF in the switching process, the SRVCC switching request is sent to the transfer I-CSCF, and the transfer I-CSCF can acquire the ATCF information from the S-CSCF registered by the user, thereby determining the ATCF providing the voice service for the user and further realizing the communication with the ATCF. Therefore, in the embodiment of the invention, when the SRVCC IWF cannot identify STN-SR and cannot determine the ATCF providing the voice service for the user, the SRVCC IWF can be determined by the transfer I-CSCF, thereby realizing the communication between the SRVCC IWF and the ATCF, ensuring that the ATCF can provide the voice service for the user and the voice service of the user is not interrupted when the SRVCC is switched.
Figure 1 shows a schematic flow diagram of a method of communicating with an ATCF according to an embodiment of the invention. As shown in fig. 1, the method is for a transit I-CSCF and comprises the following steps.
And 110, receiving the SRVCC switching request sent by the SRVCC IWF.
The SRVCC switching Request information includes user information of a user, and the SRVCC switching Request information is generated by responding to that the SRVCC IWF receives PS to CS Request information.
In the embodiment of the invention, the SRVCC IWF is configured with SIP office direction relay data to the relay I-CSCF, namely, the route between the SRVCC IWF and the relay I-CSCF is established, and all STN _ SR numbers of the MME call source are received and all the STN _ SR numbers point to the relay I-CSCF. In the switching process, after receiving the PS to CS Request sent by the MME, no matter whether the STN _ SR number contained in the PS to CS Request can be identified or not, the SRVCC IWF points to the relay I-CSCF, so that after receiving the PS to CS Request sent by the MME, the SRVCC IWF sends an SRVCC switching Request to the relay I-CSCF, so as to route the ATCF through the relay I-CSCF, and realize the communication with the ATCF.
It should be noted that, the SRVCC IWF sends the SRVCC handover request including data to be transmitted when the SRVCC IWF establishes a connection with the ATCF. The user information is a user who is currently performing a handover of a voice service from an LTE network to an 2/3G network, and the user information may be information such as an identifier and a phone number of the user.
The S-CSCF registered with the user is queried based on the user information 120.
After receiving the SRVCC handover request sent by the SRVCC IWF, the transit I-CSCF can search the ATCF providing the voice service for the user from the S-CSCF registered by the user, so the transit I-CSCF queries the S-CSCF registered by the user based on the user information.
And 130, sending the ATCF request information to the S-CSCF.
The ATCF request information includes user information, and the ATCF request information is used for requesting an ATCF that provides a voice service for a user. After inquiring the S-CSCF registered by the user, the transit I-CSCF sends an ATCF request to the S-CSCF so as to inquire the ATCF through the S-CSCF.
And 140, receiving the ATCF request response information sent by the S-CSCF.
Wherein the ATCF request response information includes information of the ATCF. After the S-CSCF receives the ATCF request information, it may query the registration information of the user according to the user information included in the ATCF request information, and determine the ATCF information providing the voice service for the user, such as the host name of the ATCF, through the registration information, and then send the ATCF information to the relay I-CSCF through the ATCF request response information. After the transit I-CSCF receives the ATCF request response information sent by the S-CSCF, the ATCF information included in the ATCF request response information can determine the ATCF providing the voice service for the user.
It should be noted that, in the embodiment of the present invention, the S-CSCF network element is configured to store, when the user registers, the information of the ATCF providing the service for the user, so that when the relay I-CSCF sends the ATCF request information, the information of the ATCF is provided to the relay I-CSCF.
And 150, sending an SRVCC switching request to the ATCF according to the ATCF information.
After the transfer I-CSCF determines the ATCF providing the voice service for the user, the SRVCC switching request sent by the SRVCC IWF is forwarded to the ATCF, so that the ATCF can communicate with the SRVCC IWF.
It should be noted that, in the embodiment of the present invention, after receiving the SRVCC handover request, the ATCF may execute a normal handover procedure until the handover procedure is completed.
In the embodiment of the invention, in the SRVCC switching process, the transfer I-CSCF receives an SRVCC switching Request sent by an SRVCC IWF after receiving a PS to CS Request, the switching Request comprises user information, the transfer I-CSCF can find an S-CSCF registered by a user based on the user information, determine an ATCF providing voice service for the user through the S-CSCF, and then forward the SRVCC switching Request sent by the SRVCC IWF to the ATCF. In the embodiment of the invention, in the SRVCC switching process, the SRVCC IWF can not identify STN-SR after receiving PS to CS Request, and the SRVCC IWF is addressed and routed to the corresponding ATCF through the transfer I-CSCF, and the information that the SRVCC IWF needs to be sent to the ATCF is forwarded to the ATCF, thereby realizing the communication between the SRVCC IWF and the ATCF in the SRVCC switching process, ensuring the completion of the SRVCC switching process, avoiding the problem that the SRVCC IWF can not identify the STN-SR to cause the SRVCC IWF to be unable to determine the ATCF providing voice service for users, and further causing the target SRVCC IWF to be unable to establish the load with the ATCF, ensuring that the ATCF can provide voice service for users, and the voice service of users can not be interrupted during VCC SRVCC switching.
In the prior art, since part of the MME does not reestablish the original IMS PDN connection even if the user moves across the network in the case where the LTE signal is continuous. Therefore, when the VoLTE user moves from the network in its area to the network in the adjacent area, if the LTE signal is continuously covered, the PGW continuously attached to the network in the area where the user before moving may occur, and at this time, the user continuously registers on the ATCF in the area where the user before moving in the IMS domain. If the switching process is executed under the condition, the STN-SR sent to the SRVCC IWF by the MME is the STN-SR of the ATCF of the area where the user is located before the movement, and at the moment, the SRVCC IWF can not identify the STN-SR, thereby causing the interruption of the user voice service. In the embodiment of the invention, the SRVCC IWF can not identify the STN-SR after receiving the PS to CS Request, and the SRVCC IWF is addressed and routed to the corresponding ATCF through the transfer I-CSCF, and the information that the SRVCC IWF needs to be sent to the ATCF is forwarded to the ATCF, thereby realizing the communication between the SRVCC IWF and the ATCF in the SRVCC switching process, ensuring the completion of the SRVCC switching process, avoiding the problem that the SRVCC IWF can not identify the STN-SR to cause the failure to determine the ATCF providing the voice service for the user, and further causing the failure of establishing the bearing between the target SRVCC IWF and the ATCF, ensuring that the ATCF can provide the voice service for the user, and the voice service of the user can not be interrupted during SRVCC switching.
Fig. 2 shows a schematic flow chart of a method of communicating with an ATCF according to yet another embodiment of the present invention. As shown in fig. 2, the data processing procedure of steps 110-150 in the embodiment of the present invention is substantially the same as the data processing procedure of steps 110-150 in the embodiment of fig. 1, except that step 120 is specifically executed as 121 and 122.
And 121, sending S-CSCF query information to the HSS.
Wherein the S-CSCF query information includes user information. The transit I-CSCF may query the HSS based on the user information when it needs to query the S-CSCF.
Specifically, the user information may include a Uniform Resource Identifier (URI) of the user, and the relay I-CSCF may initiate an S-CSCF query to the HSS according to the TEL URI information of the user in the header field of the SRVCC handover request. The S-CSCF query information may be a Location Information Request (LIR).
And 122, receiving S-CSCF query response information sent by the HSS.
And the S-CSCF query response information comprises the information of the S-CSCF. After receiving the S-CSCF query message sent by the relay I-CSCF, the HSS can query the information of the S-CSCF according to the user information in the S-CSCF query message, and then sends the S-CSCF query response message to the relay I-CSCF. And the transfer I-CSCF queries the S-CSCF through the received S-CSCF query response information.
Specifically, the S-CSCF query response information sent by the HSS may be a Location Information Answer (LIA).
In the embodiment of the invention, the transfer I-CSCF queries the S-CSCF from the HSS through the user information, and the implementation process is simple.
On the basis of the above embodiment, as an optional implementation manner, the ATCF request information sent by the transit I-CSCF to the S-CSCF may further include a destination identifier.
The destination identifier is used for representing the ATCF request information, and the destination identifier is used for providing the ATCF information of the voice service for the requesting user. After the S-CSCF receives the ATCF request information sent by the transfer I-CSCF, the destination of the ATCF request information can be identified according to the destination identifier in the ATCF request information, so that the ATCF information can be directly inquired and returned to the transfer I-CSCF.
Specifically, the ATCF request message may be a request Invite message, and the relay I-CSCF may add a destination identifier in a Contact header field of the ATCF request message, which indicates that the destination of the Invite message is to obtain the relevant information of the ATCF. The destination identity may be any form that the S-CSCF can recognise, e.g. + g.3gpp.atcf-info.
It should be noted that, in the embodiment of the present invention, the S-CSCF may preset a destination identifier that can be identified, so that after receiving the ATCF request information sent by the relay I-CSCF, the S-CSCF can identify the destination identifier in the ATCF request information.
On the basis of the above embodiment, as an optional implementation manner, the ATCF request information sent by the transit I-CSCF to the S-CSCF may further include format information.
The format information is used for indicating the format used by the ATCF information in the ATCF request response information. That is, the format corresponding to the format information needs to be used when the S-CSCF returns the ATCF information. And when the S-CSCF determines that the ATCF information is returned to the transfer I-CSCF, the format corresponding to the format information is used by the ATCF information so that the transfer I-CSCF can identify the information.
Specifically, the ATCF request message may be a request Invite message, and the relay I-CSCF may add format information in a Contact header field of the ATCF request message. The format information may be any format supported by the S-CSCF, e.g., application/vnd.3gpp.atcf-info + XML, indicating information that requires the S-CSCF to return the ATCF in XML format.
It should be noted that, in the embodiment of the present invention, the S-CSCF may preset a format for storing the ATCF information, so that after receiving the ATCF request information sent by the relay I-CSCF, the S-CSCF directly returns the ATCF information in the format corresponding to the format information.
In the embodiment of the present invention, the ATCF request response message sent by the S-CSCF to the transit I-CSCF may include a 486Busy message, that is, after receiving the ATCF request message, the S-CSCF returns a 486Busy message, and the returned 486Busy message includes information of the ATCF with a format corresponding to the format information.
For example, the XML-formatted message body of the S-CSCF486Busy message may be formatted as follows.
<？xml version＝"1.0"？>
<atcf-info>
<atcf-hostname>sip:cqpsbc2bal.cq.ims.mnc000.mcc460.3gppnetwork.org:5060</atcf-hostname>
</atcf-info>
Wherein sip: cqpsbc2bal.cq.ims.mncn000.mcc460.3gppnetwork.org: 5060 represents information of ATCF.
On the basis of the above embodiment, as an optional implementation, the user information includes a TEL URI of the user; before performing step 130, it may also be performed: and taking the TEL URI of the user as the number of a target To header field in the ATCF Request information and the Request-URI in the ATCF Request information.
The user information comprises a TEL URI of a user, and when the transfer I-CSCF sets ATCF Request information sent To the S-CSCF, the TEL URI can be used as a number of a To header field in the ATCF Request information and a Request-URI in the ATCF Request information, so that the S-CSCF can identify and process the ATCF Request information.
Figure 3 shows a schematic block diagram of an apparatus 200 for communicating with an ATCF according to an embodiment of the present invention. The apparatus 200 is disposed in the transit I-CSCF, as shown in fig. 3, the apparatus 200 includes:
a receiving unit 201, configured to receive an SRVCC handover Request sent by an SRVCC IWF, where the SRVCC handover Request information includes user information of a user, and the SRVCC handover Request information is generated in response to PS to CS Request information received by the SRVCC IWF;
an inquiring unit 202, configured to inquire, based on the user information, an S-CSCF registered by the user;
a sending unit 203, configured to send ATCF request information to the S-CSCF, where the ATCF request information includes user information, and the ATCF request information is used to request an ATCF that provides a voice service for a user;
the receiving unit 201 is further configured to receive ATCF request response information sent by the S-CSCF, where the ATCF request response information includes ATCF information;
the sending unit 203 is further configured to send an SRVCC handover request to the ATCF according to the information of the ATCF.
In the embodiment of the invention, in the SRVCC switching process, the device 200 receives an SRVCC switching Request sent by an SRVCC IWF after receiving a PS to CS Request, the switching Request comprises user information, the device 200 can find S-CSCF registered by a user based on the user information, determine ATCF providing voice service for the user through the S-CSCF, and then forward the SRVCC switching Request sent by the SRVCC IWF to the ATCF. In the embodiment of the invention, in the SRVCC switching process, the SRVCC IWF can not identify STN-SR after receiving PS to CS Request, but addresses and routes to the corresponding ATCF through the device 200, the device 200 forwards the information that the SRVCC IWF needs to be sent to the ATCF, thereby realizing the communication between the SRVCC IWF and the ATCF in the SRVCC switching process, ensuring the completion of the SRVCC switching process, avoiding the problem that the SRVCC IWF can not identify the STN-SR to cause the SRVCC IWF to be unable to determine the ATCF providing voice service for users, further causing the target SRVCC IWF to be unable to establish the load with the ATCF, ensuring that the ATCF can provide voice service for users, and the voice service of users can not be interrupted during VCC SRVCC switching.
It will be appreciated that the ATCF request message also includes a destination identifier indicating the ATCF message for which the ATCF request message is intended to provide voice services to the requesting subscriber.
It is to be understood that the ATCF request message further includes format information indicating a format used by the ATCF information in the ATCF request response message.
It can be understood that the sending unit 203 is further configured to send S-CSCF query information to the home subscriber server HSS, where the S-CSCF query information includes user information;
the receiving unit 201 is further configured to receive S-CSCF query response information sent by the HSS, where the S-CSCF query response information includes information of the S-CSCF.
It is understood that the user information includes the user's telephone TEL uniform resource identifier URI;
before sending the ATCF request information to the S-CSCF, the method further includes:
and taking the TEL URI of the user as the number of a target To header field in the ATCF Request information and the Request-URI in the ATCF Request information.
The apparatus 200 for communicating with an ATCF according to an embodiment of the present invention may correspond to an execution main body in the method for communicating with an ATCF according to an embodiment of the present invention, and the above and other operations and/or functions of each module in the apparatus 200 for communicating with an ATCF are respectively for implementing corresponding flows of each method in fig. 1 to fig. 2, and are not described herein again for brevity.
Fig. 4 is a schematic block diagram of a transit I-CSCF300 in accordance with an embodiment of the present invention. As shown in fig. 4, the relay I-CSCF300 includes a processor 301, a memory 302, and a communication interface 303, the memory 302 is used for storing executable program codes, the processor 301 executes programs corresponding to the executable program codes by reading the executable program codes stored in the memory 302, the communication interface 303 is used for communicating with external devices, and the relay I-CSCF300 may further include a bus 304, and the bus 304 is used for connecting the processor 301, the memory 302, and the communication interface 303 so that the processor 301, the memory 302, and the communication interface 303 communicate with each other through the bus 304.
Specifically, processor 301 is also configured to perform a method of communicating with an ATCF; the method for communicating with the ATCF comprises the following steps:
receiving an SRVCC switching Request sent by a single-standby voice continuous SRVCC interworking function (IWF), wherein the SRVCC switching Request information comprises user information of a user, and the SRVCC switching Request information is generated by responding to the SRVCC IWF receiving a circuit switching Request (PS to CS Request) information from a packet switch;
inquiring a service call session control function (S-CSCF) registered by a user based on the user information;
sending ATCF request information to S-CSCF, wherein the ATCF request information comprises user information and is used for requesting ATCF for providing voice service for the user;
receiving ATCF request response information sent by the S-CSCF, wherein the ATCF request response information comprises ATCF information;
and sending the SRVCC switching request to the ATCF according to the ATCF information.
The relay I-CSCF300 according to the embodiment of the present invention may correspond to an execution main body in the method for communicating with the ATCF according to the embodiment of the present invention, and the above and other operations and/or functions of each module in the relay I-CSCF300 are respectively for implementing corresponding flows of each method in fig. 1 to fig. 2, and are not described herein again for brevity.
Still another embodiment of the present invention further provides a computer-readable storage medium, in which instructions are stored, and when the instructions are executed on a computer, the instructions cause the computer to execute the database access method in the above-mentioned embodiment of the present invention.
For simplicity of description, when the instruction runs on the computer, the computer executes the flow of the method for communicating with the ATCF in the above embodiment of the present invention, which may specifically refer to the corresponding flow of each method in fig. 1 to fig. 2, and details are not described herein again.
Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the examples described in connection with the embodiments disclosed herein may be embodied in electronic hardware, computer software, or combinations of both, and that the components and steps of the examples have been described in a functional general in the foregoing description for the purpose of illustrating clearly the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications and substitutions can be easily made by those skilled in the art within the technical scope of the invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method of communicating with an access transfer control function, ATCF, for relaying an interrogating call session control function, I-CSCF, the method comprising:
receiving an SRVCC switching Request sent by a single-standby voice continuous SRVCC interworking function (IWF), wherein the SRVCC switching Request information comprises user information of a user, and the SRVCC switching Request information is generated by responding to PS to CS Request information of a packet switching to circuit switching Request received by the SRVCC IWF;
inquiring a service call session control function (S-CSCF) registered by the user based on the user information;
sending ATCF request information to the S-CSCF, wherein the ATCF request information comprises the user information and is used for requesting an ATCF for providing voice service for a user;
receiving ATCF request response information sent by the S-CSCF, wherein the ATCF request response information comprises the ATCF information;
and sending the SRVCC switching request to the ATCF according to the ATCF information.
2. The method of claim 1, wherein the ATCF request message further comprises a destination identifier indicating that the destination of the ATCF request message is ATCF information requesting voice services for the subscriber.
3. The method according to claim 1 or 2, wherein the ATCF request message further comprises format information indicating a format used by the ATCF information in the ATCF request response message.
4. The method of claim 1, wherein querying the S-CSCF registered with the user based on the user information comprises:
sending S-CSCF query information to a Home Subscriber Server (HSS), wherein the S-CSCF query information comprises the user information;
and receiving S-CSCF query response information sent by the HSS, wherein the S-CSCF query response information comprises the information of the S-CSCF.
5. The method according to claim 1, characterized in that the user information comprises the user's telephone TEL uniform resource identifier URI;
before sending the ATCF request information to the S-CSCF, the method further includes:
and taking the TEL URI of the user as the number of the To header field in the ATCF Request information and the Request-URI in the ATCF Request information.
6. A device for communicating with an access transfer control function, ATCF, configured to a relay query call session control function, I-CSCF, the device comprising:
a receiving unit, configured to receive an SRVCC handover Request sent by a single standby voice continuous SRVCC interworking function IWF, where the SRVCC handover Request information includes user information of a user, and the SRVCC handover Request information is generated in response to PS to CS Request information of a packet switched to circuit switched Request received by the SRVCC IWF;
the query unit is used for querying a service call session control function S-CSCF registered by the user based on the user information;
a sending unit, configured to send ATCF request information to the S-CSCF, where the ATCF request information includes the user information, and the ATCF request information is used to request an ATCF that provides a voice service for a user;
the receiving unit is further configured to receive ATCF request response information sent by the S-CSCF, where the ATCF request response information includes information of the ATCF;
the sending unit is further configured to send the SRVCC handover request to the ATCF according to the information of the ATCF.
7. The apparatus of claim 6, wherein the ATCF request message further comprises a destination identifier indicating that the ATCF request message is intended for ATCF information requesting voice services for a subscriber.
8. The apparatus according to claim 6 or 7, wherein the ATCF request message further comprises format information indicating a format used by the ATCF information in the ATCF request response message.
9. A relay query call session control function, I-CSCF, comprising:
a memory, a processor, a communication interface, and a bus;
the memory, the processor and the communication interface are connected through the bus and complete mutual communication;
the memory is used for storing program codes;
the processor runs a program corresponding to the executable program code by reading the executable program code stored in the memory for performing the method of any one of claims 1-5.
10. A computer-readable storage medium comprising instructions that, when executed on a computer, cause the computer to perform the method of any of claims 1-5.
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