CN108307376B - A method, device and system for selecting a called access domain - Google Patents

Abstract

The invention discloses a method, device and system for selecting a called access domain, which are used in the field of communication technology and can solve the problem that the called side needs to wait for an INVITE message to arrive as the called SCC AS and then execute the called access domain selection process. , which will increase the call connection delay and increase the waiting time of users. The method includes: receiving a call request INVITE sent by a calling user, where the INVITE includes the called number; querying whether the called number is locally registered; when the called number is locally registered, sending an access domain selection query of the called number to the HSS Request; receive the access domain selection result of the called number replied by the HSS.

Description

A method, device and system for selecting a called access domain

technical field

The present invention relates to the field of communication technologies, and in particular, to a method, device and system for selecting a called access domain.

Background technique

VOLTE (Voice over LTE, Voice over LTE) is a voice service based on IMS (IP Multimedia Subsystem, IP Multimedia Subsystem), and is a technology that enables users to perform voice services based on the bearer of an LTE (Long Term Evolution, Long Term Evolution) network. If the terminal supports VOLTE and is covered by the LTE network, the user can initiate VOLTE registration and use the LTE network-based bearer for voice services. During VOLTE registration, the user first registers with the LTE network to enable the user to use the LTE network, then the IMS core network element is registered, and then the IMS third-party AS (Application Server, application server) is registered, including the MMTel (Multi Media Telephony). , Multimedia telephony service) AS, service concentration and continuous application server SCC AS and other ASs, after the registration is completed, the user is registered in these ASs. Since the coverage of the LTE network is not as good as that of the GSM (Global System for Mobile Communication) network at this stage, users who have completed the VOLTE registration and are in the coverage area of the LTE network can use the VOLTE network to be responsible for calling tasks by the IMS. When a VOLTE user performs a calling service, it initiates a call request INVITE request to the IMS network. The INVITE request is transmitted to the IMS network through the LTE core network. After completing the calling side service control through MMTEL AS and SCC AS, the INVITE request is transparently transmitted to the receiver call side. When the VOLTE user performs the called service, all INVITE requests are sent to the I-CSCF, the inquiry call session control function at the home of the called user, and the I-CSCF sends the call to the serving call session control function S-CSCF, and the S-CSCF sends the call to each call session control function S-CSCF. The AS triggers the service. In the IMS network, the last AS that is triggered by the called service is the SCC AS, which is responsible for selecting the access domain of the called user, and determining the current access through the VOLTE or CS (CircuitSwitched, circuit switched) domain. call the user, and then connect the called user through the determined network. In the above process, the called access domain selection process is performed after the called SCC AS receives the INVITE message, which will increase the call connection delay and increase the waiting time of the user.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method, device, and system for selecting a called access domain, which can solve the problem that the called side needs to wait for an INVITE message to arrive as the called SCC AS and then execute the called access domain selection process, which may lead to calls The connection delay increases, which increases the waiting time of users.

In a first aspect, the present invention provides a method for selecting a called access domain, which is used in a scenario where a calling user performs a voice calling service through VOLTE, including:

receiving an INVITE sent by the calling user, where the INVITE includes the called number;

Query whether the called number is registered locally;

When the called number is locally registered, send an access domain selection query request of the called number to the HSS (Home Subscriber Server);

Receive the access domain selection result of the called number replied by the HSS.

In a second aspect, the present invention provides a method for selecting a called access domain, which is used in a scenario where a called user performs a voice called service, and the method includes:

Receive the INVITE sent by the calling user, where the INVITE includes the called number;

Query whether the called number is registered locally;

When the called number is registered locally, determine whether the access domain selection result of the called number is recorded;

When the access domain selection result of the called number is recorded, the voice called service is performed based on the access domain selection result.

In a third aspect, the present invention provides a device for selecting a called access domain, which is used in a scenario where a calling user performs a voice calling service through VOLTE, including:

a receiving unit, configured to receive an INVITE sent by the calling user, where the INVITE includes the called number;

an inquiry unit, used to inquire whether the called number is registered locally;

a sending unit, configured to send an access domain selection query request of the called number to the HSS when the called number is registered locally;

The receiving unit is further configured to receive the access domain selection result of the called number replied by the HSS.

In a fourth aspect, the present invention provides a device for selecting a called access domain, which is used in a scenario where a called user performs a voice called service, including:

a receiving unit, configured to receive a call request INVITE sent by the calling user, where the INVITE includes the called number;

an inquiry unit, used to inquire whether the called number is registered locally;

a judgment unit for judging whether the access domain selection result of the called number is recorded when the called number is registered locally;

A call execution unit, configured to execute the voice called service based on the access domain selection result when the access domain selection result of the called number is recorded.

In a fifth aspect, the present invention provides a system for selecting a called access domain, including the device for selecting a called access domain as described in the third aspect and the selection of a called access domain as described in the third aspect device.

Embodiments of the present invention provide a method, device, and system for selecting a called access domain. In the present invention, on the calling side, the calling SCC AS queries whether the called number is registered locally after receiving the INVITE including the called number. ; When the called number is registered locally, send the access domain selection query request of the called number to the HSS; and after receiving the access domain selection result of the called number replied by the HSS, record the access domain selection result; On the calling side, after receiving the INVITE including the called number, the called SCC AS queries whether the called number is registered locally; when the called number is registered locally, it determines whether the access domain selection result of the called number is recorded; When the access domain selection result of the called number is recorded, the voice called service is performed based on the access domain selection result. In the embodiment of the present invention, when the calling SCC AS determines that the called number is registered locally, it can determine that the calling SCC AS and the called SCC AS are the same device, and the calling SCC AS performs the access domain selection of the called number Then, when the INVITE is transmitted to the called side and the calling SCC AS is used as the called SCCAS, the recorded result of the called access domain selection can be directly used to perform the called For the voice called service, it is not necessary to perform the process of selecting the called access domain again, which saves the waiting time of the call process and reduces the call duration delay.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 shows a schematic flowchart of a method for selecting a called access domain according to an embodiment of the present invention;

2 shows a schematic flowchart of a method for selecting a called access domain according to yet another embodiment of the present invention;

3 shows a schematic block diagram of an apparatus for selecting a called access domain according to an embodiment of the present invention;

4 shows a schematic block diagram of an apparatus for selecting a called access domain according to another embodiment of the present invention;

FIG. 5 shows a schematic block diagram of an apparatus for selecting a called access domain according to still one or more embodiments of the present invention;

FIG. 6 is a schematic block diagram of a system for selecting a called access domain according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, 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 accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that the embodiments in the present application and the features of the embodiments may be combined with each other in the case of no conflict. The present application will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

The embodiment of the present invention is applicable to the scenario where the calling SCC AS and the called SCCAS are the same device when the calling user performs the voice service through VOLTE. In the scenario where the calling user performs voice services through VOLTE, the calling user sends an INVITE, and the INVITE is transmitted through the EPC (Evolved Packet Core, packet core network) core network to the SCCAS in the IMS network on the calling side, that is, the calling SCC AS. The called SCC AS continues to transmit the received INVITE to the called side. When the SCC AS on the called side (the called SCC AS) is responsible for the selection of the called access domain, after the called SCC AS receives the INVITE of the calling user, The network to which the called voice service accesses is selected, that is, the called access domain is selected. After the called access domain selection is completed, the called user is called through the selected access domain. In the scenario where the calling user performs voice services through VOLTE, the calling user and the called user may reside in the same SCC AS at the same time, that is, the calling SCC AS and the called SCC AS are the same device, so in the implementation of the present invention In the example, the calling SCC AS can perform the called access domain selection process while continuing to transmit the received INVITE, so that when the INVITE is transmitted to the called SCC AS (that is, the calling SCC AS), the called SCC The AS has completed the called access domain selection process, and does not need to perform the called access domain selection process again, saving the waiting time of the calling process.

FIG. 1 shows a schematic flowchart of a method for selecting a called access domain according to an embodiment of the present invention. The method is used in a scenario where a calling user performs a voice calling service through VOLTE. As shown in FIG. 1 , the method includes the following steps: 110, receiving an INVITE sent by the calling user, the INVITE including the called number; 120, querying the called number Whether to register locally; 130, when the called number is registered locally, send an access domain selection query request of the called number to the HSS; 140, receive the access domain selection result of the called number replied by the HSS.

In step 110, when the calling user performs a voice calling service through VOLTE, an INVITE is sent through the user equipment, and the INVITE carries the called number called by the calling user, and the INVITE is transmitted to the calling SCCAS on the LTE and IMS networks. The first line of the INVITE message, Request_URI, includes the called number.

It should be noted that, after receiving the call request INVITE sent by the calling user in step 110, the bishop SCC AS also needs to transparently transmit the INVITE message to the network element (the network element in the voice call flow) backward, that is, it needs to The process of executing the voice call process in the prior art will not be described in detail again.

In step 120, after receiving the INVITE sent by the calling user, the calling SCC AS can determine the called number of the called user from the INVITE. At this time, the calling SCC AS needs to check whether the called number is registered locally to determine the called number. Whether the calling user is registered with the calling SCC AS. If the called user is registered in the calling SCC AS, it means that the called user resides in the calling SCC AS, that is, when the call process is executed to the called side, the calling SCC AS will be used as the called SCC on the called side. The AS executes the process of the called access domain selection. At this time, in order to shorten the duration of the call and shorten the waiting time of the user, the calling SCCAS will execute the called access selection process before the INVITE is transmitted to the called side. . If the called user is not registered in the calling SCC AS, it means that the called user does not reside in the calling SCC AS, that is, when the call process is executed to the called side, the calling SCC AS will not be used as the calling side's SCC AS. The called SCC AS executes the process of the called access domain selection, and the operation ends at this point.

It should be noted that after the user registers in the SCC AS, the SCC AS will record the information of the registered user. Therefore, in this step, the calling SCC AS can determine the called number by comparing the called number with the recorded information of the registered user. Whether the user is registered in it or not, whether it is registered locally.

In step 130, after the calling SCC AS determines that the called party is registered locally, it executes the called access domain selection process, that is, sends an access domain selection query request of the called number to the HSS, and the request carries the called number, HSS After determining the access domain selection result of the called number, reply the access domain selection result of the called number to the calling SCC AS.

In step 140, the HSS replies the access domain selection result of the called number to the calling SCC AS, and records the access domain selection result returned by the HSS to facilitate subsequent execution of the called voice called service.

In the embodiment of the present invention, on the calling side, after receiving the INVITE including the called number, the calling SCC AS inquires whether the called number is registered locally; when the called number is registered locally, it sends the access information of the called number to the HSS. Domain selection query request; and after receiving the access domain selection result of the called number replied by the HSS, record the access domain selection result. In the embodiment of the present invention, when the calling SCC AS determines that the called number is registered locally, it can determine that the calling SCC AS and the called SCC AS are the same device, and the calling SCC AS performs the access domain selection of the called number process, and record the called access domain selection result, so that when the INVITE is transmitted to the called side and the calling SCC AS is used as the called SCC AS, the recorded called access domain selection result can be directly used for the called The voice called service does not need to perform the called access domain selection process again, which saves the waiting time of the call process and reduces the call duration delay.

It can be understood that, after the present invention receives the access domain selection result of the called number replied by the HSS, the method can also record the access domain selection result, and specifically record the access domain selection result and the access domain selection result corresponding to the access domain selection result. Entry selection time.

Among them, the access domain selection result returned by the HSS is recorded, so as to facilitate the subsequent execution of the called voice called service. The access domain selection time is the time when the HSS replies to the access domain selection result, and the corresponding access domain selection time is recorded when the access domain selection result is recorded, which can reflect the actual effect of the access domain selection result. Since the network status, user adaptation equipment, etc. may change, these changes may affect the access domain selection result, so the access domain selection result has practicality. In this step, the access domain selection time can be used to reflect the access Whether the domain selection result is valid, to avoid the situation that the access domain selection result is not suitable for the current voice call when the called party performs the voice call service, which will affect the voice call.

It can be understood that, in the embodiment shown in FIG. 1 , step 120 may include: 121 , constructing an IMPU (IP Multimedia Public Identity, IP Multimedia Public Identity) of the called number based on a preset format; 122 , querying the called number based on the constructed IMPU; Whether the calling number is registered locally.

Among them, the information of registered users is usually stored in the SCC AS device through an IMPU in a preset format, that is, each registered user corresponds to an IMPU. The format constructs the IMPU of the called number, so in step 122, the IMPU of the called number is compared with the registered user information recorded in the calling SCC AS to check whether the called number is registered locally to ensure the accuracy of the query.

Specifically, the preset format includes a telephone uniform resource identifier TEL URI format, and the TEL URI format is a commonly used format at present. The calling SCC AS obtains the called number of this call from the first line Request_URI of the INVITE message, and then constructs an IMPU in the TEL URI format of the called number based on the TEL URI format.

It should be noted that the TEL URI format may include the format of "tel:+86+user number". In this embodiment of the present invention, +86 indicates that the user number is a Chinese number. For example, for a 11-digit number starting with 1 The number 15942333323 is used to construct an IMPU in the TEL URI format, and the 11-digit number is prefixed with the Chinese country code "+86", and the IMPU in the TEL URI format is "tel: +8615942333323".

Further, on the basis of the preset format including the TEL URI format, the way of recording the access domain selection result and the access domain selection time corresponding to the access domain selection result can be as shown in Table 1, where IMPU is the called number. IMPU in TEL URI format: "tel:+86+called number", which is used to query the access domain selection result of the called number through parameters on the called side; Time is used to record the access domain selection time, and the format can be It is YYYY:MM:DD hh:mm:ss; T-ADS Reslut is used to record the access domain selection result of the called number, and the access domain selection result of the called number includes VOLTE or CS.

Table 1

IMPU Time T-ADS Reslut tel: +86139XXXXXXXX YYYY:MM:DD hh:mm:ss VOLTE/CS

FIG. 2 shows a schematic flowchart of a method for selecting a called access domain according to yet another embodiment of the present invention. The method is used in a scenario where the called user performs a voice called service. As shown in FIG. 2, the method includes the following steps: 210, receive an INVITE sent by the calling user, and the INVITE includes the called number; 220, query whether the called number is in the Local registration; 230, when the called number is registered locally, determine whether the access domain selection result of the called number is recorded; 240, when the access domain selection result of the called number is recorded, based on the access domain selection result Execute the voice called service.

In step 210, the INVITE sent by the calling user is transmitted to the called side network via the calling side network, and the called SCCAS receives the INVITE sent by the calling user, and needs to select the access domain for the called number.

It should be noted that, in this embodiment of the present invention, if the calling SCC AS and the called SCC AS are the same device, that is, the calling SCC AS is responsible for selecting the access domain of the called number, the calling SCC AS will When the calling side receives the INVITE, it executes the access domain selection process and records the access domain selection result. Therefore, after receiving the INVITE sent by the calling user, the called SCC AS can first determine whether the called number is registered locally. . If the called number is registered locally in the called SCCAS, the access domain selection result may already exist in the called SCC AS, and the called SCC AS can directly use the access domain selection result; if the called number is not locally in the called SCC AS registration, the called SCC AS needs to perform the access domain selection process of the called number.

In step 220, the called SCC AS inquires whether the called number is registered locally, so as to determine whether the called SCC AS may already have the access domain selection result of the called number.

In step 230, when the called number is registered locally, it means that the called user resides in the called SCCAS, and the called SCC AS may already have the access domain selection result of the called number, so the called SCC It is judged whether the AS records the access domain selection result of the called number.

It should be noted that, on the calling side, after the calling SCC AS determines that the called number is registered locally, it will perform the access domain selection process of the called number, and will also transparently transmit the calling INVITE to the NE. , then the INVITE is transmitted to the called SCC AS on the called side (at this time, the called SCC AS and the calling SCC AS are the same device), there may be an access domain selection process performed by the SCC AS as the calling SCC AS. If the access domain selection result is obtained, then the SCC AS as the called SCCAS does not have a record of the access domain selection result. Therefore, after the called SCC AS determines that the called number is registered locally, it needs to determine whether the called SCC AS is The access domain selection result of the called number is recorded.

In step 240, when the called SCC AS determines that it has recorded the access domain selection result of the called number, the voice called service is performed based on the access domain selection result.

In the embodiment of the present invention, on the called side, after receiving the INVITE including the called number, the called SCC AS inquires whether the called number is registered locally; when the called number is registered locally, it determines whether the connection of the called number is recorded. Enter the domain selection result; and when the access domain selection result of the called number is recorded, execute the voice called service based on the access domain selection result. In the embodiment of the present invention, when the calling SCC AS determines that the called number is registered locally, it can determine that the calling SCC AS and the called SCC AS are the same device, and the calling SCC AS performs the access domain selection of the called number process, and record the called access domain selection result, so that when the INVITE is transmitted to the called side and the calling SCC AS is used as the called SCC AS, the recorded called access domain selection result can be directly used for the called The voice called service does not need to perform the called access domain selection process again, which saves the waiting time of the call process and reduces the call duration delay.

It can be understood that, in the embodiment shown in FIG. 2 , when the called SCC AS determines that it has recorded the access domain selection result of the called number, it can also perform the following steps: determine the current time and the access domain. Whether the interval between the access domain selection times corresponding to the selection result exceeds the preset interval threshold; when the interval between the current time and the access domain selection time exceeds the preset interval threshold, execute the access domain selection process of the called number ; When the interval between the current time and the access domain selection time does not exceed the preset interval threshold, perform the voice called service based on the access domain selection result.

The called SCC AS may record the access domain selection time corresponding to the access domain selection result while recording the access domain selection result. The access domain selection time may reflect the time limit of the access domain selection result. The preset interval threshold is preset and is used to determine whether the access domain selection result is valid, that is, when the time interval between the access domain selection time corresponding to the access domain selection result and the current time exceeds the preset interval threshold, the access If the domain selection result is invalid, the called SCCAS needs to re-execute the access domain selection process of the called number; when the time interval between the access domain selection time corresponding to the access domain selection result and the current time does not exceed the preset interval threshold, then The access domain selection result is valid, and the called SCC AS can directly use the access domain selection result.

Since the network status, user adaptation equipment, etc. may change, these changes may affect the access domain selection result, so the access domain selection result has practicality. In this step, the current time is corresponding to the access domain selection result. The interval between the selected access domain selection times is compared with the preset interval threshold to determine whether the access domain selection result is valid, so as to avoid that the access domain selection result is not suitable for the current voice call when the called party performs the voice call service. , which affects the voice call.

It can be understood that the INVITE includes the IMPU of the called number, and the format of the IMPU is a preset format, and step 220 may be specifically performed as: querying whether the called number is locally registered based on the IMPU.

Wherein, under normal circumstances, the information of registered users is usually stored in the SCC AS device through an IMPU in a preset format, that is, each registered user corresponds to an IMPU. In order to facilitate the search and ensure the accuracy of the search, in step 220 You can directly use the IMPU of the called number to compare with the registered user information recorded in the called SCC AS to check whether the called number is registered locally, to ensure the accuracy of the query.

Specifically, the preset format includes a TEL URI format, and the TEL URI format is a commonly used format at present.

It can be understood that, in this embodiment of the present invention, the following steps are further included: when the access domain selection result of the called number is not recorded, query whether the access domain selection process of the called number is currently being performed; When executing the access domain selection process of the called number, execute the access domain selection process of the called number; when currently executing the access domain selection process of the called number, wait for the currently executing access domain of the called number. The access domain selection result of the selection process; the voice called service is performed based on the waiting access domain selection result.

Among them, the called SCC AS determines that the called number is registered locally, but it does not have a record of the access domain selection result. It may be that the access domain selection process performed by the called SCC AS as the calling SCC AS has not ended. That is, the called SCCAS has performed the access domain selection process as the calling SCC AS, but has not obtained the access domain selection result, so you can first query whether the called SCC AS is currently performing the access domain of the called number. Choose a process. If the called SCC AS is currently executing the access domain selection process of the called number, it can wait for the access domain selection result of the currently executing access domain selection process of the called number. After obtaining the access domain selection result , directly use the result of the waiting access domain selection to perform the voice called service; if the called SCC AS is not currently performing the access domain selection process of the called number, the called SCCAS needs to re-execute the access domain of the called number. Choose a process.

FIG. 3 shows a schematic block diagram of an apparatus 300 for selecting a called access domain according to an embodiment of the present invention. The apparatus 300 is used in a scenario where a calling user performs a voice calling service through Voice over Long Term Evolution VOLTE. As shown in FIG. 3 , the apparatus 300 includes:

a receiving unit 301, configured to receive a call request INVITE sent by the calling user, where the INVITE includes the called number;

Inquiry unit 302, configured to inquire whether the called number is registered locally;

a sending unit 303, configured to send an access domain selection query request of the called number to the HSS when the called number is registered locally;

The receiving unit 301 is further configured to receive the access domain selection result of the called number replied by the HSS.

In the embodiment of the present invention, on the calling side, after receiving the INVITE including the called number, the calling SCC AS inquires whether the called number is registered locally; when the called number is registered locally, it sends the access information of the called number to the HSS. Domain selection query request; and after receiving the access domain selection result of the called number replied by the HSS, record the access domain selection result. In the embodiment of the present invention, when the calling SCC AS determines that the called number is registered locally, it can determine that the calling SCC AS and the called SCC AS are the same device, and the calling SCC AS performs the access domain selection of the called number process, and record the called access domain selection result, so that when the INVITE is transmitted to the called side and the calling SCC AS is used as the called SCC AS, the recorded called access domain selection result can be directly used for the called The voice called service does not need to perform the called access domain selection process again, which saves the waiting time of the call process and reduces the call duration delay.

It can be understood that the apparatus further includes a recording unit, configured to record the access domain selection result and the access domain selection time corresponding to the access domain selection result, and the access domain selection time is the HSS reply. The time of the access domain selection result.

It can be understood that the query unit 302 is also used for:

Constructing the network protocol IP multimedia public identity IMPU of the called number based on the preset format;

Based on the constructed IMPU, query whether the called number is registered locally.

It can be understood that the preset format includes a telephony uniform resource identifier TEL URI format.

The apparatus 300 for selecting a called access domain according to the embodiment of the present invention may correspond to the execution subject in the method for selecting a called access domain according to the embodiment of the present invention, and each of the apparatuses 300 for selecting a called access domain The above and other operations and/or functions of the unit are respectively to implement the corresponding flow of each method in FIG. 1 , and are not repeated here for brevity.

FIG. 4 shows a schematic block diagram of an apparatus 400 for selecting a called access domain according to another embodiment of the present invention. The apparatus 400 is used in a scenario where the called user performs a voice called service. As shown in FIG. 4 , the apparatus 400 includes:

A receiving unit 401, configured to receive a call request INVITE sent by a calling user, where the INVITE includes the called number;

Inquiry unit 402, configured to inquire whether the called number is registered locally;

Judging unit 403, configured to judge whether the access domain selection result of the called number is recorded when the called number is registered locally;

The call execution unit 404 is configured to execute the voice called service based on the access domain selection result when the access domain selection result of the called number is recorded.

In the embodiment of the present invention, on the called side, after receiving the INVITE including the called number, the called SCC AS inquires whether the called number is registered locally; when the called number is registered locally, it determines whether the connection of the called number is recorded. Enter the domain selection result; and when the access domain selection result of the called number is recorded, execute the voice called service based on the access domain selection result. In the embodiment of the present invention, when the calling SCC AS determines that the called number is registered locally, it can determine that the calling SCC AS and the called SCC AS are the same device, and the calling SCC AS performs the access domain selection of the called number process, and record the called access domain selection result, so that when the INVITE is transmitted to the called side and the calling SCC AS is used as the called SCC AS, the recorded called access domain selection result can be directly used for the called The voice called service does not need to perform the called access domain selection process again, which saves the waiting time of the call process and reduces the call duration delay.

FIG. 5 shows a schematic block diagram of an apparatus 400 for selecting a called access domain according to still one or more embodiments of the present invention.

It can be understood that, as shown in FIG. 5 , the judging unit 403 is further configured to judge the access domain corresponding to the current time and the access domain selection result when the access domain selection result of the called number is recorded. Whether the interval between domain selection times exceeds the preset interval threshold;

The call execution unit 404 is further configured to execute the voice called call based on the access domain selection result when the interval between the current time and the access domain selection time does not exceed the preset interval threshold business;

Apparatus 400 also includes:

An access domain selection execution unit 405, configured to execute the access domain of the called number based on the INVITE when the interval between the current time and the access domain selection time exceeds the preset interval threshold Choose a process.

It can be understood that the INVITE includes the network protocol IP multimedia public identifier IMPU of the called number, and the format of the IMPU is a preset format, wherein,

The querying unit 402 is further configured to query whether the called number is registered locally based on the IMPU.

Specifically, the preset format includes a telephony uniform resource identifier TEL URI format.

It can be understood that, as shown in FIG. 5 , the query unit 402 is further configured to query whether the access domain selection of the called number is currently being performed when the access domain selection result of the called number is not recorded. process;

The access domain selection execution unit 405 is further configured to execute the access domain selection process of the called number when the access domain selection process of the called number is not currently being executed;

The apparatus 200 further includes:

A waiting unit 406, configured to wait for the access domain selection result of the currently executing access domain selection process of the called number when the called number access domain selection process is currently being executed;

The call execution unit 404 is further configured to execute the voice called service based on the result of the waiting access domain selection.

The apparatus 400 for selecting a called access domain according to the embodiment of the present invention may correspond to the execution subject in the method for selecting a called access domain according to the embodiment of the present invention, and each of the apparatuses for selecting a called access domain 400 The above and other operations and/or functions of the unit are respectively to implement the corresponding flow of each method in FIG. 2 , and are not repeated here for brevity.

FIG. 6 is a schematic block diagram of a system 500 for selecting a called access domain according to an embodiment of the present invention. As shown in FIG. 6 , the system 500 includes the apparatus 300 for selecting a called access domain as described in FIG. 3 and the apparatus 400 for selecting a called access domain as described in FIGS. 4-5 .

It should be noted that the system 500 may be located on one SCC AS device, that is, one SCC AS can implement the corresponding processes of each method in FIG. 1 , and can also implement the corresponding processes of each method in FIG. 2 .

Those of ordinary skill in the art can realize that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. Interchangeability, the above description has generally described the components and steps of each example in terms of function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functionality using different methods for each particular application, but such implementations should not be considered beyond the scope of the present invention.

Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the system, device and unit described above may refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited to this. Any person skilled in the art can easily think of various equivalents within the technical scope disclosed by the present invention. Modifications or substitutions should be included within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims (15)

1. a method for selecting a called access domain, used for a calling user to carry out a scenario in which a voice calling service is carried out by Voice over Long Term Evolution (VOLTE), wherein the method comprises: receiving a call request sent by the calling user, where the call request includes the called number; Query whether the called number is registered locally, wherein the SCC AS corresponding to the called number and the SCC AS corresponding to the calling number are the same SCC AS; When the called number is locally registered, send an access domain selection query request of the called number to the home subscriber server HSS; receiving the access domain selection result of the called number replied by the HSS; The method also includes: Record the access domain selection result and the access domain selection time corresponding to the access domain selection result, where the access domain selection time is the time when the HSS replies to the access domain selection result. 2. The method according to claim 1, wherein the step of querying whether the called number is registered locally comprises: The network protocol IP multimedia public identity IMPU of the called number is constructed based on the preset format; Based on the constructed IMPU, query whether the called number is registered locally. 3. The method according to claim 2, wherein the preset format comprises a TEL URI format. 4. A method for selecting a called access domain, used for a scenario in which a called user performs a voice called service through Voice over Long Term Evolution (VOLTE), wherein the method comprises: receiving a call request sent by the calling user, where the call request includes the called number; Query whether the called number is registered locally, wherein the SCC AS corresponding to the called number and the SCC AS corresponding to the calling number are the same SCC AS; When the called number is registered locally, determine whether the access domain selection result of the called number is recorded; When the access domain selection result of the called number is recorded, execute the voice called service based on the access domain selection result; The method further determines whether the interval between the current time and the access domain selection time corresponding to the access domain selection result exceeds a preset interval threshold when the access domain selection result of the called number is recorded, wherein , When the interval between the current time and the access domain selection time does not exceed the preset interval threshold, execute the voice called service based on the access domain selection result; When the interval between the current time and the access domain selection time exceeds the preset interval threshold, the access domain selection process of the called number is executed. 5. The method according to claim 4, wherein the call request comprises an IP Multimedia Public Identity IMPU of the called number, and the format of the IMPU is a preset format, wherein: Query whether the called number is registered locally based on the IMPU. 6. The method according to claim 5, wherein the preset format comprises a TEL URI format. 7. The method according to claim 4, wherein the method further comprises: When the access domain selection result of the called number is not recorded, query whether the access domain selection process of the called number is currently being performed; When the access domain selection process of the called number is not currently being performed, execute the access domain selection process of the called number; When currently executing the access domain selection process of the called number, wait for the access domain selection result of the currently executing access domain selection process of the called number; The voice called service is performed based on the result of the pending access domain selection. 8. A device for selecting a called access domain, used for a scenario in which a calling user performs a voice calling service through Voice over Long Term Evolution (VOLTE), wherein the device comprises: a receiving unit, configured to receive a call request sent by the calling user, where the call request includes the called number; a query unit, configured to query whether the called number is registered locally, wherein the SCC AS corresponding to the called number and the SCC AS corresponding to the calling number are the same SCC AS; a sending unit, configured to send an access domain selection query request of the called number to the home subscriber server HSS when the called number is locally registered; The receiving unit is further configured to receive the access domain selection result of the called number replied by the HSS; Also includes: a recording unit, configured to record the access domain selection result and the access domain selection time corresponding to the access domain selection result, where the access domain selection time is the time when the HSS replies to the access domain selection result . 9. The device according to claim 8, wherein the query unit is further configured to: The network protocol IP multimedia public identity IMPU of the called number is constructed based on the preset format; Based on the constructed IMPU, query whether the called number is registered locally. 10. The apparatus according to claim 9, wherein the preset format comprises a telephony uniform resource identifier TEL URI format. 11. A device for selecting a called access domain, used for a scenario in which a called user performs a voice called service through Voice over Long Term Evolution (VOLTE), wherein the device comprises: a receiving unit, configured to receive a call request sent by the calling user, where the call request includes the called number; an inquiry unit, used to inquire whether the called number is registered locally; a judging unit, configured to judge whether the access domain selection result of the called number is recorded when the called number is registered locally, wherein the SCC AS corresponding to the called number and the SCC corresponding to the calling number AS is the same SCC AS; a call execution unit, configured to execute the voice called service based on the access domain selection result when the access domain selection result of the called number is recorded; The judging unit is further configured to judge whether the interval between the current time and the access domain selection time corresponding to the access domain selection result exceeds a preset interval threshold when recording the access domain selection result of the called number; The call execution unit is further configured to execute the voice called service based on the access domain selection result when the interval between the current time and the access domain selection time does not exceed the preset interval threshold ; The device also includes: an access domain selection execution unit, configured to execute the access domain of the called number based on the call request when the interval between the current time and the access domain selection time exceeds the preset interval threshold Choose a process. 12. The apparatus according to claim 11, wherein the call request comprises an IP Multimedia Public Identity IMPU of the called number, and the format of the IMPU is a preset format, wherein: The query unit is further configured to query whether the called number is registered locally based on the IMPU. 13. The apparatus according to claim 12, wherein the preset format comprises a telephony uniform resource identifier TEL URI format. 14. The apparatus of claim 12, wherein The query unit is further configured to query whether the access domain selection process of the called number is currently being performed when the access domain selection result of the called number is not recorded; The access domain selection execution unit is further configured to execute the access domain selection process of the called number when the access domain selection process of the called number is not currently being executed; The device also includes: a waiting unit, configured to wait for the access domain selection result of the currently executing access domain selection process of the called number when the called number access domain selection process is currently being executed; The call execution unit is further configured to execute the voice called service based on the result of the waiting access domain selection. 15. A system for selecting a called access domain, characterized in that the system comprises the device for selecting a called access domain according to any one of claims 8-10 and the device for selecting a called access domain according to any one of claims 11-14. The selection device of the called access domain described above.

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