CN114466324B

CN114466324B - Calling method and related device

Info

Publication number: CN114466324B
Application number: CN202210074894.3A
Authority: CN
Inventors: 陈拴锋; 丁明; 张忠理
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2022-01-21
Filing date: 2022-01-21
Publication date: 2023-03-10
Anticipated expiration: 2042-01-21
Also published as: CN114466324A

Abstract

The embodiment of the application provides a calling method and a related device, which are applied to the technical field of communication, wherein the method comprises the following steps: the first network equipment receives first information and second information from the terminal equipment; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment; the first network equipment establishes a binding relationship between a first card and a second card; when the first network equipment cannot successfully establish a called call with a first card of the terminal equipment, the first network equipment initiates a call to a second card of the terminal equipment based on the binding relationship. According to the method, the communication of one card in an unreachable state is transferred to the other card bound with the unreachable state through the network side, the condition that the terminal equipment misses incoming call information is reduced, and the conversation use experience of a user is improved.

Description

Calling method and related device

Technical Field

The present application relates to the field of communications technologies, and in particular, to a calling method and a related apparatus.

Background

With the development of communication technology, dual Sim Dual Standby (DSDS) mobile terminals become the mainstream of the market. The dual card dual standby may include a dual card dual standby dual pass and a dual card dual standby single pass. The dual card dual standby bi-pass mobile terminal can support the function that the card 1 can still display the incoming call of the card 2 during the call, the dual card dual standby bi-pass technology is complex, and the dual card dual standby single pass mobile phone is a common dual card dual standby single pass mobile phone in the market at present.

For a dual-card dual-standby single-pass mobile terminal, two SIM cards are configured in the mobile terminal. While card 1 is in a call, card 2 is unable to receive incoming messages. After the call of the card 1 is finished, the terminal system will not display the missed call of the card 2. Similarly, the card 2 may not receive the incoming call of the card 1 during the call, which results in an unreachable call for the user. The user call unreachable situation may also include other reasons. For example: the mobile terminal is in a standby state, and since a Tracking Area Code (TAC) of the card 1 changes, a Tracking Area Update (TAU) is triggered, and during the update, the card 1 may not receive a called party.

In order to solve the problem that the user calls unreachable, the operator opens an unreachable call forwarding service. When a card currently held by a user is not timely, the incoming call on the card is transferred to another card, so that the condition that the user misses the call is reduced. In the implementation, the mobile terminal is configured with a call forwarding function, and a user can manually add the SIM card number for call forwarding, but the service is hidden in a mobile terminal menu, so that the situation of active setting by the user is low, the unreachable call forwarding service is not fully used, and the user experience is further reduced.

Disclosure of Invention

The embodiment of the application provides a calling method and a related device, which transfer the communication of one card in an unreachable state to another card bound with the card through a network side, reduce the condition that terminal equipment misses incoming call information, and improve the conversation use experience of a user.

In a first aspect, an embodiment of the present application provides a calling method, including a first network device receiving first information and second information from a terminal device; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment; the first network equipment establishes a binding relationship between the first card and the second card; when the first network equipment cannot successfully establish a called call with a first card of the terminal equipment, the first network equipment initiates a call to a second card of the terminal equipment based on the binding relationship. In the implementation mode, the network side can transfer the communication of one card in an unreachable state to another card bound with the card, so that the condition that the terminal equipment misses the incoming call information is reduced, and the conversation use experience of a user is improved.

In one possible implementation, the identification of the terminal device includes: the first international mobile equipment identity IMEI and the second IMEI of the terminal equipment and/or the SN serial number of the terminal equipment. Therefore, the identity of the terminal equipment can be determined according to the first IMEI, the second IMEI and/or the SN, the accuracy of the double-card binding relation based on the same terminal equipment is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, the first information further includes information of a card slot into which the first card is inserted, and the second information further includes information of a card slot into which the second card is inserted. Therefore, the first network equipment can distinguish the double cards in the terminal equipment based on the card slot information, the accuracy of the double-card binding relationship based on the same terminal equipment is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, the receiving, by the first network device, the first information and the second information from the terminal device includes: the method comprises the steps that first network equipment receives a first registration request from terminal equipment; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information; the first network equipment receives a second registration request from the terminal equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information. Therefore, when the first card and the second card are managed by the same network device, the binding relationship of the two cards can be changed in real time along with the registration of the terminal device, the accuracy of the binding relationship of the two cards based on the same terminal device is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, the receiving, by the first network device, the first information and the second information from the terminal device includes: the method comprises the steps that first network equipment receives a first registration request from terminal equipment; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information; the first network equipment receives second information from second network equipment, wherein the second information is acquired by the second network equipment based on a second registration request received from the terminal equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information. Therefore, when the double cards are respectively managed by different network equipment, the binding relationship of the double cards can be changed in real time along with the registration of the terminal equipment, the accuracy of the double-card binding relationship based on the same terminal equipment is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, after the first network device receives the first registration request from the terminal device, the method further includes: the first network equipment sends a registration acceptance message to the terminal equipment, wherein the acceptance message comprises information used for indicating whether the first network equipment supports setting of unreachable call forwarding based on the same equipment double-card binding relationship. Therefore, the terminal equipment can determine whether the call forwarding can be realized based on the network side, the accuracy of the call forwarding initiated by the network side based on the binding relationship is improved, and the conversation experience of the user is further improved.

In one possible implementation, a deregistration request from a terminal device is received at a first network device; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card; the first network device invalidates the binding based on the de-registration request. Therefore, the double-card binding relationship of the same terminal equipment can be unbound in real time according to the actual condition of the terminal equipment, the accuracy of call forwarding initiated by the network side based on the binding relationship is improved, and the conversation experience of a user is further improved.

In one possible implementation, the deregistration request is sent by the terminal device when a card unplugging event, a shutdown event and/or an airplane mode starting event is detected. Therefore, the accuracy of the double-card binding relationship based on the same terminal equipment is improved by the registration removing request, and the conversation experience of the user is further improved.

In one possible implementation, the binding relationship identifies a timestamp at the time the binding relationship was generated. Therefore, the binding relationship is stored based on the timestamp, the accuracy of the double-card binding relationship based on the same terminal equipment is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, when a first network device fails to successfully establish a called call with a first card of a terminal device, the initiating, by the first network device, a call to a second card of the terminal device based on a binding relationship includes: when the first network equipment cannot successfully establish a called call with a first card of the terminal equipment, the first network equipment judges whether the terminal equipment presets a target card for call forwarding of the first card; if the terminal equipment does not have a preset target card, the first network equipment initiates a call to a second card of the terminal equipment based on the binding relationship. Therefore, when the user does not set call forwarding and one card is not timely, the network side can initiate a call to the other card based on the binding relationship, the condition that the terminal equipment misses the incoming call information is reduced, and the conversation use experience of the user is improved.

In one possible implementation, a switch is provided in the first network device; if the terminal device does not have a preset target card, the first network device initiates a call to a second card of the terminal device based on the binding relationship, including: if the terminal equipment does not preset a target card, the first network equipment judges whether the switch is opened or not; and when the switch is on, the first network equipment initiates a call to the second card of the terminal equipment based on the binding relationship. Therefore, when the switch is turned on, the network side can initiate a call based on the binding relationship, the condition that the terminal equipment misses the incoming call information is reduced, and the conversation use experience of a user is improved.

In a second aspect, an embodiment of the present application provides a calling method, including: the terminal equipment sends first information to first network equipment; the terminal equipment sends second information to the first network equipment and/or the second network equipment; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment; a second card of the terminal equipment receives a call initiated by the first network equipment or the second network equipment based on the binding relationship; the binding relationship is a binding relationship between the first card and the second card, which is established by the first network device and/or the second network device. In the implementation mode, the terminal equipment can receive the call forwarding initiated by the network side based on the binding relationship, the condition that the terminal equipment misses the incoming call information is reduced, and the conversation use experience of a user is improved.

In one possible implementation manner, the identification of the terminal device includes: the first international mobile equipment identity IMEI and the second IMEI of the terminal equipment and/or the SN serial number of the terminal equipment. Therefore, the identity of the terminal equipment can be determined according to the first IMEI and the second IMEI, and/or the SN, the accuracy of the double-card binding relationship based on the same terminal equipment is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, the sending, by the terminal device, the first information to the first network device includes: the terminal equipment sends a first registration request to the first network equipment; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information. Therefore, the binding relationship of the double cards can be changed in real time along with the registration of the first card in the terminal equipment, the accuracy of the double-card binding relationship based on the same terminal equipment is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, the sending, by the terminal device, the second information to the first network device and/or the second network device includes: the terminal equipment sends a second registration request to the first network equipment and/or the second network equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information. Therefore, the binding relationship of the double cards can be changed in real time along with the registration of the second card in the terminal equipment, the accuracy of the double-card binding relationship based on the same terminal equipment is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, the sending, by the terminal device, the first registration request to the first network device includes: the terminal equipment receives a registration acceptance message from the first network equipment, wherein the acceptance message comprises information used for indicating whether the first network equipment supports setting of unreachable call forwarding based on the same equipment double-card binding relationship. Therefore, the terminal equipment can determine whether the call forwarding can be realized based on the network side, the accuracy of the call forwarding initiated by the network side based on the binding relationship is improved, and the conversation experience of the user is further improved.

In a possible implementation manner, the terminal device sends a deregistration request to the first network device, so that the first network device invalidates the binding relationship based on the deregistration request; the deregistration request includes an identification of the terminal device, information of the first card, and/or information of the second card. Therefore, the double-card binding relationship of the same terminal equipment can be unbound in real time according to the actual condition of the terminal equipment, the accuracy of call forwarding initiated by the network side based on the binding relationship is improved, and the conversation experience of a user is further improved.

In a possible implementation manner, when the terminal device detects a card unplugging event, a shutdown event, and/or an airplane mode starting event, the terminal device sends a deregistration request to the first network device. Therefore, the accuracy of the double-card binding relationship based on the same terminal equipment is improved by the registration removing request, and the conversation experience of the user is further improved.

In a third aspect, an embodiment of the present application provides a network device for performing a call method, where the network device may include a processing device and a transceiver device. The processing means is adapted to perform the steps of the processing in the calling method and the transceiving means is adapted to perform the steps of the communication with other devices in the calling method. The network device may further include a storage means for storing a program and data of the call method.

In a possible implementation manner, the transceiver receives the first information and the second information from the terminal device; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment; the processing device establishes a binding relationship between the first card and the second card; and when the processing device cannot successfully establish a called call with the first card of the terminal equipment, the processing device initiates a call to the second card of the terminal equipment based on the binding relationship. In the implementation mode, the network side can transfer the communication of one card in an unreachable state to the other card bound with the card, so that the condition that the terminal equipment misses the incoming call information is reduced, and the conversation use experience of a user is improved.

In one possible implementation, the identification of the terminal device includes: the first international mobile equipment identity IMEI and the second IMEI of the terminal equipment and/or the SN serial number of the terminal equipment.

In a possible implementation manner, the first information further includes information of a card slot into which the first card is inserted, and the second information further includes information of a card slot into which the second card is inserted.

In a possible implementation manner, the receiving and sending device receives the first information and the second information from the terminal device, and includes: a transceiver of first network equipment receives a first registration request from terminal equipment; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information; the transceiver of the first network equipment receives a second registration request from the terminal equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information.

In a possible implementation manner, the receiving and sending device receives the first information and the second information from the terminal device, and includes: a transceiver of first network equipment receives a first registration request from terminal equipment; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information; the transceiver of the first network equipment receives second information from the transceiver of the second network equipment, wherein the second information is acquired by the transceiver of the second network equipment based on a second registration request received from the terminal equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information.

In a possible implementation manner, after the transceiver receives the first registration request from the terminal device, the method further includes: the receiving and sending device sends a registration acceptance message to the terminal equipment, wherein the acceptance message comprises information used for indicating whether the first network equipment supports setting of unreachable call forwarding based on the same equipment double-card binding relationship.

In a possible implementation manner, a deregistration request from the terminal equipment is received at the transceiver; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card; the processing device invalidates the binding based on the deregistration request.

In one possible implementation, the deregistration request is sent by the terminal device when a card unplugging event, a shutdown event and/or an airplane mode starting event is detected.

In one possible implementation, the binding relationship identifies a timestamp at the time the binding relationship was generated.

In a possible implementation manner, when the processing device fails to successfully establish a called call with a first card of the terminal device, the processing device initiates a call to a second card of the terminal device based on the binding relationship, including: when the processing device cannot successfully establish a called call with a first card of the terminal equipment, the processing device judges whether the terminal equipment presets a target card for call forwarding of the first card; and if the terminal equipment does not have a preset target card, the processing device initiates a call to a second card of the terminal equipment based on the binding relationship.

In a possible implementation manner, the network device further includes a switch device; if the terminal device does not have a preset target card, the processing device initiates a call to a second card of the terminal device based on the binding relationship, and the call comprises the following steps: if the terminal equipment is not provided with the target card in advance, the processing device judges whether the switch device is started or not; and when the switching device is started, the processing device initiates a call to the second card of the terminal equipment based on the binding relationship.

In a fourth aspect, an embodiment of the present application provides a terminal device for executing a calling method, where the terminal device includes: a processor, an interface circuit and a display screen. The display screen is used for supporting the display step executed by the calling method; the processor is used for supporting the terminal equipment to execute the information processing steps, and the interface circuit is used for supporting the terminal equipment to execute the receiving or sending steps.

In a possible implementation, an interface circuit of a first card sends first information to a first network device; the interface circuit of the second card sends second information to the first network equipment and/or the second network equipment; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment; an interface circuit of the second card receives a call initiated by the first network equipment or the second network equipment based on the binding relationship; the binding relationship is the binding relationship between the first card and the second card established by the first network device and/or the second network device. In the implementation mode, the network side can transfer the communication of one card in an unreachable state to another card bound with the card, so that the condition that the terminal equipment misses the incoming call information is reduced, and the conversation use experience of a user is improved.

In one possible implementation, the identification of the terminal device includes: the first international mobile equipment identity IMEI and the second IMEI of the terminal equipment and/or the serial number of the terminal equipment.

In one possible implementation, the sending, by the interface circuit of the first card, the first information to the first network device includes: an interface circuit of a first card sends a first registration request to first network equipment; the first registration request comprises a network standard registration request or an IMS registration request; the first registration request carries first information.

In a possible implementation manner, the sending, by the interface circuit of the second card, the second information to the first network device and/or the second network device includes: the interface circuit of the second card sends a second registration request to the first network equipment and/or the second network equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information.

In one possible implementation, after the interface circuit of the first card sends the first registration request to the first network device, the method includes: the interface circuit receives a registration acceptance message from the first network device, the acceptance message including information indicating whether the first network device supports setting of unreachable call forwarding based on a same device dual card binding relationship.

In one possible implementation, the interface circuit sends a deregistration request to the first network device, so that the first network device invalidates the binding relationship based on the deregistration request; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card.

In one possible implementation, the interface circuit sends a deregistration request to the first network device upon detection of a card unplugging event, a shutdown event, and/or an open airplane mode event.

In a fifth aspect, embodiments of the present application provide a computer-readable storage medium storing instructions that, when executed, implement any one of the methods of any possible implementation manners of the first aspect or the second aspect.

In a sixth aspect, embodiments of the present application provide a computer program product including a computer program, which, when run on a computer, causes the computer to perform the method described in any one of the possible implementations of the first aspect and/or the second aspect.

It should be understood that the third aspect to the sixth aspect of the present application correspond to the technical solutions of the first aspect and the second aspect of the present application, and the beneficial effects achieved by the aspects and the corresponding possible implementations are similar and will not be described again.

Drawings

Fig. 1 is a schematic view of a scenario in a call method that may be implemented;

fig. 2 is a schematic diagram of a scenario in a call method that may be implemented;

fig. 3 is a diagram of a communication system architecture provided by an embodiment of the present application;

fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present application;

fig. 5 is a flowchart illustrating a calling method according to an embodiment of the present application;

FIG. 6 is a schematic interface diagram illustrating a call according to an embodiment of the present application;

FIG. 7 is a schematic interface diagram illustrating a call according to an embodiment of the present application;

fig. 8 is a flowchart illustrating a calling method according to an embodiment of the present application;

fig. 9 is a flowchart illustrating a calling method according to an embodiment of the present application;

fig. 10 is a flowchart illustrating a calling method according to an embodiment of the present application;

FIG. 11 is a schematic diagram of an interface in a call method that may be implemented;

fig. 12 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 13 is a schematic structural diagram of a terminal device according to an embodiment of the present application.

Detailed Description

In order to clearly describe the technical solutions of the embodiments of the present application, some terms and technologies referred to in the embodiments of the present application are briefly described below:

1) IP Multimedia Subsystem (IMS): next Generation Network (NGN) architecture for implementing IP-based telephony and multimedia services is described.

2) International Mobile Equipment Identity (IMEI): the 'electronic serial number' formed by 15 digits is a globally unique ID bound with a mobile phone, IMEI is used for distinguishing each mobile terminal, and the double-card terminal has two IMEI.

3) Serial Number (SN): the product serial number, this document refers specifically to the SN of the terminal device.

4) User equipment (user equipment, UE): the terminal equipment in communication may be referred to as UE for short.

5) The mobile station international ISDN number (MSISDN) is the number that uniquely identifies a mobile subscriber in the public telephone network switching network numbering plan.

6) The international mobile subscriber identity (IMSI: international Mobile subscriber identification Number) a Number assigned internationally to uniquely identify a Mobile subscriber.

7) IP multimedia private identity (IMPI: IP Multimedia Private Identity) the unique Identity assigned by the network to the IMS user.

8) The user hidden identifier (SUCI: subscription managed Identifier) Identifier encrypted for the unique identity of the 5G user.

9) Globally unique temporary UE identity (GUTI: global Unique temporal UE Identity) based on security considerations, a Unique Temporary user Identity assigned by the network under 4G.

10 5G globally unique temporary UE identity (5G-GUTI: 5G-Global Unique temporal UE Identity) based on security considerations, a Unique Temporary user Identity assigned by the network under 5G.

In the embodiments of the present application, the words "first", "second", and the like are used to distinguish the same items or similar items having substantially the same functions and actions. For example, the first chip and the second chip are only used for distinguishing different chips, and the sequence order thereof is not limited. Those skilled in the art will appreciate that the terms "first," "second," etc. do not denote any order or quantity, nor do the terms "first," "second," etc. denote any order or importance.

It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "such as" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present relevant concepts in a concrete fashion.

In the embodiments of the present application, "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone, wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a-b, a-c, b-c, or a-b-c, wherein a, b, c can be single or multiple.

Technical background that may be involved is briefly introduced to enable those skilled in the art to better understand the technical solutions in the embodiments of the present application.

In the field of communication technology, in consideration of cost and the like, a dual-card dual-standby single-pass mobile terminal shares a set of Radio Frequency (RF) transceiving system, so that when two cards are used, radio Frequency resources can be seized between the cards.

Illustratively, fig. 1 is a schematic view of a scenario of a user unreachable situation. As shown in fig. 1, a card 1 and a card 2 are inserted into card slots of a dual card dual standby mobile terminal (hereinafter, referred to as "terminal device or UE") of a user 1, respectively. As shown in a of fig. 1, the user 2 dials the card 1 of the user 1 or the user 1 uses the card 1 to make a call to the user 2, and the user 1 is talking using the card 1. At this time, card 1 occupies the radio frequency resource, and card 2 is in a call unreachable state. At this time, the user 3 dials the number of the card 2 of the user 1, and the user 3 hears a voice prompt like "wrong-up, user who dialed cannot be connected for a while". The terminal device of user 1 still presents a call interface with user 2, and the caller id display of user 3 does not appear, as shown in c in fig. 1. When the user 1 clicks the hang-up key, the communication between the user 1 and the user 2 is ended. The terminal device of user 1 enters the interface shown as d in fig. 1 from the interface shown as b in fig. 1. The d-interface in fig. 1 does not show the call log of the user 3. That is, the user 1 does not receive the call of the user 3, and at the same time, the user 1 cannot know that the user 3 makes a call during the call, which degrades the call experience between the user 1 and the user 3.

For a user with a busy communication service, the call experience of the user is seriously influenced under the unreachable condition that one card of the dual-card dual-standby mobile terminal cannot answer the call while the other card is in the call. In addition to the above scenarios, when the dual card dual standby mobile terminal is in the standby state, there are situations that the user is not reachable due to individual scenarios and unknown network reasons.

Illustratively, fig. 2 is another scenario diagram of a user unreachable situation. As shown in fig. 2, a card 1 and a card 2 are inserted into card slots of a dual card dual standby mobile terminal (hereinafter, referred to as "terminal device or UE") of a user 1, respectively. The cards 1 and 2 may belong to different operators or to the same operator. When the user 1 crosses from one TA2 of the card 1 to a new TA3, causing the TAC of the card 1 to change, the TAU is triggered. During the TAU period, the card 1 often cannot receive the called party, and if the user 2 happens to dial the number of the card 1 of the user 1 at the moment, the call may not be connected, so that the situation that the user cannot reach is caused, and the call experience of the user is influenced.

In order to reduce the unreachable situation, the user can open the unreachable call forwarding service on the terminal equipment, but the menu of the call forwarding service is usually hidden. When the user does not know that the terminal device has the call forwarding service or does not know how to manually set the call forwarding service, the terminal device cannot be fully used to improve the conversation experience of the user.

In view of this, embodiments of the present application provide a call method, which may extend a call forwarding service on a network device side of a core network. Two cards of the terminal equipment respectively send first information and second information to the network equipment; the network equipment determines the two cards on the same terminal equipment based on the first information and the second information, and establishes a binding relationship between the first card and the second card; when the network device can not successfully initiate the called call to the first card, the network device initiates a call to a second card of the terminal device based on the binding relationship. The method automatically transfers the call of one card to another card bound with the call through the network side, reduces the unreachable condition of the user, and improves the conversation use experience of the user.

Before explaining the technical solution of the embodiment of the present application in detail, a communication system according to the embodiment of the present application will be described with reference to the accompanying drawings.

Fig. 3 shows a communication system architecture diagram of an embodiment of the present application. As shown in fig. 3, the communication system includes a core network 310, a plurality of network devices 320, and a plurality of terminal devices 330. Where the network device 320 is a device in the core network 310, the network device 320 may be one or more. For example, the network device may include a first network device and a second network device, and the first network device and the second network device may respectively control communication activities of the plurality of terminal devices. The network device 320 may support different network systems, and the network device may support network systems of 4G, 5G, and 6G, or any combination thereof. The network systems of different network devices may be the same or different. The terminal device 330 is a mobile terminal provided with two or more card slots. Illustratively, the terminal device 330 may be a mobile phone and a tablet, etc. supporting dual-card dual-standby or three-card triple-standby. The network device and the terminal device in the communication system shown in fig. 3 are adaptive examples, and the present application is not limited thereto.

In order to better understand the embodiments of the present application, the following describes the structure of the electronic device according to the embodiments of the present application:

fig. 4 shows a schematic structural diagram of the electronic device 100. The electronic device 100 may include a processor 110, an external memory interface 120, an internal memory 121, a Universal Serial Bus (USB) interface 130, a charging management module 140, a power management module 141, a battery 142, an antenna 1, an antenna 2, a mobile communication module 150, a wireless communication module 160, an audio module 170, a speaker 170A, a receiver 170B, a microphone 170C, an earphone interface 170D, a sensor module 180, a key 190, a motor 191, an indicator 192, a camera 193, a display screen 194, a Subscriber Identity Module (SIM) card interface 195, and the like.

The sensor module 180 may include a pressure sensor 180A, a gyroscope sensor 180B, an air pressure sensor 180C, a magnetic sensor 180D, an acceleration sensor 180E, a distance sensor 180F, a proximity light sensor 180G, a fingerprint sensor 180H, a temperature sensor 180J, a touch sensor 180K, an ambient light sensor 180L, a bone conduction sensor 180M, and the like.

It is to be understood that the illustrated structure of the embodiment of the present application does not specifically limit the electronic device 100. In other embodiments of the present application, electronic device 100 may include more or fewer components than shown, or some components may be combined, some components may be split, or a different arrangement of components. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

Processor 110 may include one or more processing units, such as: the processor 110 may include an Application Processor (AP), a modem processor, a Graphics Processor (GPU), an Image Signal Processor (ISP), a controller, a video codec, a Digital Signal Processor (DSP), a baseband processor, and/or a neural-Network Processing Unit (NPU), etc. Wherein, the different processing units may be independent devices or may be integrated in one or more processors.

The controller can generate an operation control signal according to the instruction operation code and the timing signal to complete the control of instruction fetching and instruction execution.

A memory may also be provided in processor 110 for storing instructions and data. In some embodiments, the memory in the processor 110 is a cache memory. The memory may hold instructions or data that have just been used or recycled by the processor 110. If the processor 110 needs to reuse the instruction or data, it may be called from memory. Avoiding repeated accesses reduces the latency of the processor 110, thereby increasing the efficiency of the system.

In some embodiments, processor 110 may include one or more interfaces. The interface may include an integrated circuit (I2C) interface, an integrated circuit built-in audio (I2S) interface, a Pulse Code Modulation (PCM) interface, a universal asynchronous receiver/transmitter (UART) interface, a Mobile Industry Processor Interface (MIPI), a general-purpose input/output (GPIO) interface, a Subscriber Identity Module (SIM) interface, and/or a Universal Serial Bus (USB) interface, etc.

It should be understood that the interface connection relationship between the modules illustrated in the embodiments of the present application is an illustrative description, and does not form a structural limitation on the electronic device 100. In other embodiments of the present application, the electronic device 100 may also adopt different interface connection manners or a combination of multiple interface connection manners in the above embodiments.

The charging management module 140 is configured to receive charging input from a charger. The charger may be a wireless charger or a wired charger. In some wired charging embodiments, the charging management module 140 may receive charging input from a wired charger via the USB interface 130. In some wireless charging embodiments, the charging management module 140 may receive a wireless charging input through a wireless charging coil of the electronic device 100. The charging management module 140 may also supply power to the electronic device through the power management module 141 while charging the battery 142.

The power management module 141 is used to connect the battery 142, the charging management module 140 and the processor 110. The power management module 141 receives input from the battery 142 and/or the charging management module 140, and supplies power to the processor 110, the internal memory 121, the display 194, the camera 193, the wireless communication module 160, and the like. The power management module 141 may also be used to monitor parameters such as battery capacity, battery cycle count, battery state of health (leakage, impedance), etc. In some other embodiments, the power management module 141 may also be disposed in the processor 110. In other embodiments, the power management module 141 and the charging management module 140 may be disposed in the same device.

The wireless communication function of the electronic device 100 may be implemented by the antenna 1, the antenna 2, the mobile communication module 150, the wireless communication module 160, a modem processor, a baseband processor, and the like.

The antennas 1 and 2 are used for transmitting and receiving electromagnetic wave signals. The antenna in the electronic device 100 may be used to cover a single or multiple communication bands. Different antennas can also be multiplexed to improve the utilization of the antennas. For example: the antenna 1 may be multiplexed as a diversity antenna of a wireless local area network. In other embodiments, the antenna may be used in conjunction with a tuning switch.

The mobile communication module 150 may provide a solution including 2G/3G/4G/5G wireless communication applied to the electronic device 100. The mobile communication module 150 may include at least one filter, a switch, a power amplifier, a Low Noise Amplifier (LNA), and the like. The mobile communication module 150 may receive the electromagnetic wave from the antenna 1, filter, amplify, etc. the received electromagnetic wave, and transmit the electromagnetic wave to the modem processor for demodulation. The mobile communication module 150 may also amplify the signal modulated by the modem processor, and convert the signal into electromagnetic wave through the antenna 1 to radiate the electromagnetic wave. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the processor 110. In some embodiments, at least some of the functional modules of the mobile communication module 150 may be disposed in the same device as at least some of the modules of the processor 110.

The modem processor may include a modulator and a demodulator. The modulator is used for modulating a low-frequency baseband signal to be transmitted into a medium-high frequency signal. The demodulator is used for demodulating the received electromagnetic wave signal into a low-frequency baseband signal. The demodulator then passes the demodulated low frequency baseband signal to a baseband processor for processing. The low frequency baseband signal is processed by the baseband processor and then passed to the application processor. The application processor outputs a sound signal through an audio device (not limited to the speaker 170A, the receiver 170B, etc.) or displays an image or video through the display screen 194. In some embodiments, the modem processor may be a stand-alone device. In other embodiments, the modem processor may be provided in the same device as the mobile communication module 150 or other functional modules, independent of the processor 110.

The wireless communication module 160 may provide solutions for wireless communication applied to the electronic device 100, including Wireless Local Area Networks (WLANs) (e.g., wireless fidelity (Wi-Fi) networks), bluetooth (bluetooth, BT), global Navigation Satellite System (GNSS), frequency Modulation (FM), near Field Communication (NFC), infrared (IR), and the like. The wireless communication module 160 may be one or more devices integrating at least one communication processing module. The wireless communication module 160 receives electromagnetic waves via the antenna 2, performs frequency modulation and filtering processing on electromagnetic wave signals, and transmits the processed signals to the processor 110. The wireless communication module 160 may also receive a signal to be transmitted from the processor 110, perform frequency modulation and amplification on the signal, and convert the signal into electromagnetic waves through the antenna 2 to radiate the electromagnetic waves.

In some embodiments, antenna 1 of electronic device 100 is coupled to mobile communication module 150 and antenna 2 is coupled to wireless communication module 160 so that electronic device 100 can communicate with networks and other devices through wireless communication techniques. The wireless communication technology may include global system for mobile communications (GSM), general Packet Radio Service (GPRS), code Division Multiple Access (CDMA), wideband Code Division Multiple Access (WCDMA), time division code division multiple access (time-division code division multiple access, TD-SCDMA), long Term Evolution (LTE), LTE, BT, GNSS, WLAN, NFC, FM, and/or IR technologies, etc. GNSS may include Global Positioning System (GPS), global navigation satellite system (GLONASS), beidou satellite navigation system (BDS), quasi-zenith satellite system (QZSS), and/or Satellite Based Augmentation System (SBAS).

The electronic device 100 implements display functions via the GPU, the display screen 194, and the application processor. The GPU is a microprocessor for image processing, and is connected to the display screen 194 and an application processor. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 110 may include one or more GPUs that execute program instructions to generate or alter display information.

The display screen 194 is used to display images, video, and the like. The display screen 194 includes a display panel. The display panel may be a Liquid Crystal Display (LCD), an organic light-emitting diode (OLED), an active-matrix organic light-emitting diode (active-matrix organic light-emitting diode, AMOLED), a flexible light-emitting diode (FLED), a miniature, a Micro-oeld, a quantum dot light-emitting diode (QLED), or the like. In some embodiments, the electronic device 100 may include 1 or N display screens 194, N being a positive integer greater than 1.

The electronic device 100 may implement a shooting function through the ISP, the camera 193, the video codec, the GPU, the display 194, the application processor, and the like.

The ISP is used to process the data fed back by the camera 193. For example, when a photo is taken, the shutter is opened, light is transmitted to the camera photosensitive element through the lens, the optical signal is converted into an electrical signal, and the camera photosensitive element transmits the electrical signal to the ISP for processing and converting into an image visible to naked eyes. The ISP can also carry out algorithm optimization on the noise, brightness and skin color of the image. The ISP can also optimize parameters such as exposure, color temperature and the like of a shooting scene. In some embodiments, the ISP may be provided in camera 193.

The camera 193 is used to capture still images or video. The object generates an optical image through the lens and projects the optical image to the photosensitive element. The photosensitive element may be a Charge Coupled Device (CCD) or a complementary metal-oxide-semiconductor (CMOS) phototransistor. The light sensing element converts the optical signal into an electrical signal, which is then passed to the ISP where it is converted into a digital image signal. And the ISP outputs the digital image signal to the DSP for processing. The DSP converts the digital image signal into image signal in standard RGB, YUV and other formats. In some embodiments, electronic device 100 may include 1 or N cameras 193, N being a positive integer greater than 1.

The digital signal processor is used for processing digital signals, and can process digital image signals and other digital signals. For example, when the electronic device 100 selects a frequency bin, the digital signal processor is used to perform fourier transform or the like on the frequency bin energy.

Video codecs are used to compress or decompress digital video. The electronic device 100 may support one or more video codecs. In this way, the electronic device 100 may play or record video in a variety of encoding formats, such as: moving Picture Experts Group (MPEG) 1, MPEG2, MPEG3, MPEG4, and the like.

The NPU is a neural-network (NN) computing processor that processes input information quickly by using a biological neural network structure, for example, by using a transfer mode between neurons of a human brain, and can also learn by itself continuously. Applications such as intelligent recognition of the electronic device 100 can be realized through the NPU, for example: image recognition, face recognition, speech recognition, text understanding, and the like.

The external memory interface 120 may be used to connect an external memory card, such as a Micro SD card, to extend the memory capability of the electronic device 100. The external memory card communicates with the processor 110 through the external memory interface 120 to implement a data storage function. For example, files such as music, video, etc. are saved in an external memory card.

The internal memory 121 may be used to store computer-executable program code, which includes instructions. The internal memory 121 may include a program storage area and a data storage area. The storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required by at least one function, and the like. The storage data area may store data (such as audio data, phone book, etc.) created during use of the electronic device 100, and the like. In addition, the internal memory 121 may include a high-speed random access memory, and may further include a nonvolatile memory, such as at least one magnetic disk storage device, a flash memory device, a universal flash memory (UFS), and the like. The processor 110 executes various functional applications of the electronic device 100 and data processing by executing instructions stored in the internal memory 121 and/or instructions stored in a memory provided in the processor.

The electronic device 100 may implement audio functions via the audio module 170, the speaker 170A, the receiver 170B, the microphone 170C, the headphone interface 170D, and the application processor. Such as music playing, recording, etc.

The audio module 170 is used to convert digital audio information into an analog audio signal output and also to convert an analog audio input into a digital audio signal. The audio module 170 may also be used to encode and decode audio signals. In some embodiments, the audio module 170 may be disposed in the processor 110, or some functional modules of the audio module 170 may be disposed in the processor 110.

The speaker 170A, also called a "horn", is used to convert the audio electrical signal into an acoustic signal. The electronic apparatus 100 can listen to music through the speaker 170A or listen to a handsfree call.

The receiver 170B, also called "earpiece", is used to convert the electrical audio signal into an acoustic signal. When the electronic apparatus 100 receives a call or voice information, it can receive voice by placing the receiver 170B close to the ear of the person.

The microphone 170C, also referred to as a "microphone," is used to convert sound signals into electrical signals. When making a call or transmitting voice information, the user can input a voice signal to the microphone 170C by speaking near the microphone 170C through the mouth. The electronic device 100 may be provided with at least one microphone 170C. In other embodiments, the electronic device 100 may be provided with two microphones 170C to achieve a noise reduction function in addition to collecting sound signals. In other embodiments, the electronic device 100 may further include three, four or more microphones 170C to collect sound signals, reduce noise, identify sound sources, and perform directional recording.

The earphone interface 170D is used to connect a wired earphone. The headset interface 170D may be the USB interface 130, or may be a 3.5mm open mobile electronic device platform (OMTP) standard interface, a cellular telecommunications industry association (cellular telecommunications industry association of the USA, CTIA) standard interface.

Illustratively, the electronic device 100 may further include one or more of keys 190, a motor 191, an indicator 192, a SIM card interface 195 (eSIM card), and the like.

The SIM card interface 195 is used to connect a SIM card. The SIM card can be brought into and out of contact with the electronic apparatus 100 by being inserted into the SIM card interface 195 or being pulled out of the SIM card interface 195. The electronic device 100 may support 1 or N SIM card interfaces, N being a positive integer greater than 1. The SIM card interface 195 may support a Nano SIM card, a Micro SIM card, a SIM card, etc. The same SIM card interface 195 can be inserted with multiple cards at the same time. The types of the plurality of cards may be the same or different. The SIM card interface 195 may also be compatible with different types of SIM cards. The SIM card interface 195 may also be compatible with external memory cards. The electronic device 100 interacts with the network through the SIM card to implement functions such as communication and data communication. In some embodiments, the electronic device 100 employs esims, namely: an embedded SIM card. The eSIM card can be embedded in the electronic device 100 and cannot be separated from the electronic device 100.

The call method provided by the embodiment of the present application is described in detail below with reference to the accompanying drawings. In the present embodiment, "at … …" may be an instant when a certain condition occurs or a period of time after the certain condition occurs, and the present embodiment is not particularly limited to this.

Note that two or more cards are provided in the terminal device, and in the present application, two cards are described as an example, and then the first card and the second card are used to distinguish the two cards.

Optionally, the first card and/or the second card may belong to different operators, and may be, for example, a mobile card, a universal card, or a telecommunication card. This is not limited by the present application.

Illustratively, fig. 5 shows a flow chart of a calling method in the embodiment of the present application.

S501, the first network equipment receives first information and second information from the terminal equipment.

The first information may include an identification of the terminal device and information of a first card in the terminal device. Optionally, the first information may further include information of a card slot into which the first card is inserted. The second information may include an identification of the terminal device and information of a second card in the terminal device. Optionally, the second information may further include information of a card slot into which the second card is inserted. Illustratively, the identifier of the terminal device is an identifier used for indicating the uniqueness of the terminal device, and may include: the first IMEI (IMEI 1) and the second IMEI (IMEI 2) of the terminal equipment, and/or a Serial Number (SN) of the terminal equipment, etc. The information of the first card is a unique identifier associated with the first MSISDN, and may include, but is not limited to IMSI, IMPI, SUCI, GUTI, 5G-GUTI, and the like. The information of the second card is a unique identifier associated with the second MSISDN and may include, but is not limited to, IMSI, IMPI, SUCI, GUTI, 5G-GUTI, etc.

The terminal equipment sends the first information and the second information to the first network equipment. In a possible implementation, in a specific scenario, the terminal device sends the first information and the second information to the first network device synchronously. For example: after the terminal equipment responds to the operations of starting, inserting the card and closing the flight mode, the terminal equipment simultaneously sends the first information and the second information. In another possible implementation, the terminal device sequentially sends the first information and the second information. For example: the user changes the first card and the second card from the deactivation state to the activation state in sequence, and the terminal equipment sends the first information and the second information according to the activation sequence. The first network equipment receives the first information and the second information from the terminal equipment and stores the first information and the second information into a database of the first network equipment.

S502, the first network equipment establishes a binding relation between the first card and the second card.

The first network device may look up the first information and the second information of the terminal device based on the database. When the first information and the second information exist in the first network device at the same time, it is determined that the first card and the second card are respectively installed in two card slots of the terminal device. The first network device binds the first card with the second card.

S503, when the first network device cannot successfully establish the called call with the first card of the terminal device, the first network device initiates a call to the second card of the terminal device based on the binding relationship.

When the first card is not timely, the first network device cannot successfully initiate a called call to the first card. The first network device may view the binding relationship of the first card in a database. And after the first card is determined to be bound with the second card, the first network equipment transfers the call of the first card to the second card.

According to the calling method provided by the embodiment of the application, the terminal equipment sends the first information and the second information to the first network equipment, and the first network equipment judges that the first card and the second card are installed on the same terminal equipment. The first network equipment establishes a binding relationship between the first card and the second card, and when the first card of the terminal equipment appears untimely, the first network equipment can initiate a call to the second card of the terminal equipment based on the binding relationship. The method reduces the condition that the terminal equipment misses the incoming call information, and improves the conversation use experience of the user.

Based on the calling method provided by the above embodiment, supplementary description is given below with reference to fig. 6 to 11 for an application scenario and an execution flow of the method.

First, an application scenario of the call method provided in the embodiment of the present application is described. Fig. 6 is a diagram illustrating a scenario according to an embodiment of the present application, which can solve a problem corresponding to fig. 1 in a possible implementation scenario.

Exemplarily, fig. 6 shows an interface diagram of a terminal device using the calling method provided by the embodiment of the present application.

The terminal apparatus shown in fig. 6 is a terminal apparatus held by the user 1. As shown in the interface a in fig. 6, when the user 1 and the user 2 (e.g. 159 XXXXXXXX) are in conversation, the first card (card 1) occupies the radio frequency resource of the terminal device, resulting in the second card (card 2) being in a call unreachable state. At this point, the first network device receives a message from user 3 (e.g., 180 XXXXXXXX) to call user 1 card 2. The first network device initiates a call to the card 2 but cannot establish communication of the card 2 with the MSISDN of the subscriber 3. Based on the binding relationship pre-stored in the database, the first network device may acquire first card information bound with the second card and initiate a call to the first card. The terminal device enters an interface as shown in b in fig. 6, in which the terminal device keeps the user 2 talking with the user 1, while the interface shows that the user 3 is calling to ask the user 1 whether to answer the call of the user 3. Illustratively, one or more of the incoming user, the incoming card number, the call card number (card 1 or card 2), and the original call card number (card 1 or card 2) may be displayed in the interface.

It is understood that the caller identification interface shown in the embodiment of the present application is exemplary, and the caller identification interface may be in other forms. For example, the interface shown in b of fig. 6 may provide functions of answering a call and holding a current call, and/or answering a call and calling to hold a current call, in addition to the answering and hanging up functions. Specifically, the user 1 may answer the incoming call of the user 3, but the call of the user 3 is in a call hold state, and after the call between the user 1 and the user 2 is completed, the user 1 may continue to communicate with the user 3; or the user 1 answers the incoming call of the user 3 and hangs up the conversation with the user 2; or the user 1 may answer the incoming call of the user 3 and keep talking with the user 2, and after the user 1 finishes talking with the user 3, the user 1 continues talking with the user 2. This is not limited by the present application.

Illustratively, at the interface shown as b in fig. 6, the user 1 can choose to put the incoming call of the user 3 on or off. For example, the user 1 hangs up the incoming call of the user 3, and notifies the user 3 in the form of a short message, and replies to the incoming call later. At which point user 1 continues to talk to user 2. For example, when the user 1 answers the incoming call of the user 3, and the terminal device receives the touch operation of connecting the call, the terminal device of the user 1 and the terminal device of the user 3 establish communication through the first network device, and the terminal device enters a communication interface with the user 3 as shown in c in fig. 6.

Illustratively, fig. 7 shows an interface schematic diagram of another terminal device using the calling method provided by the embodiment of the present application.

Card 1 of the terminal device is not reachable by card 1 due to weak or no signal coverage, as shown in a in fig. 7, when the first network device receives a message that user 2 (e.g. 159 XXXXXXXX) calls user 1 card 1. The first network device initiates a call to the card 1 but cannot establish communication between the card 1 and the MSISDN of the subscriber 2. Based on the binding relationship pre-stored in the database, the first network device may acquire second card information bound with the first card and initiate a call to the second card. The terminal device enters an interface shown as b in fig. 7, the user 1 can select to answer the incoming call of the user 2, and when the terminal device receives a touch operation of connecting the call, the terminal device of the user 1 and the terminal device of the user 2 establish communication through the first network device.

According to the calling method provided by the embodiment of the application, the first card and the second card of the terminal device are bound through the network device. When the second card of the user is in a call, the first card is unreachable or the first card is not timely caused by other reasons, the network device may call the second card in the terminal device based on the binding relationship. Therefore, the situation that a card of the terminal equipment cannot be timely and the user misses the incoming call information is reduced, and the conversation use experience of the user is improved.

It should be noted that, in steps S501 to S503 in the embodiment of the present application, the number of the network devices referred to by the first network device may be one or multiple network devices.

In one possible implementation, the number of network devices referred to by the first network device is one, the network device managing the first card and the network device managing the second card are the same network device, and the first network device may manage the communication activities of the first card and the second card at the same time.

In another possible implementation, the number of the network devices referred to by the first network device is two, that is, the network device managing the first card and the network device managing the second card are different network devices, and the first network device manages the first card and the second network device manages the second card.

In another possible implementation, the terminal device is a three-card three-standby terminal, and the three cards are managed by three different network devices, that is, the first network device manages the first card, the second network device manages the second card, and the third network device manages the third card.

In yet another possible implementation, the first network device manages a first card, the second network device manages a second card, and the third network device is configured to contact and/or manage the first network device and the second network device. It can be understood that the call forwarding initiated by the network side based on the binding relationship between the first card and the second card is within the protection scope of the present application, and the present application does not limit the number of network devices.

The following describes the calling method in steps S501-S503 in detail by taking the case where the first network device manages the first card and the second card at the same time in the above possible implementation as an example and referring to fig. 8. As shown in fig. 8:

in one possible implementation, the terminal device may send the first information and the second information to the first network device in a manner that the first registration request carries the first information and the second registration request carries the second information during registration. It may be understood that the first network device may also obtain the first information and the second information in other manners, which is not limited in this application.

S801, a first network device receives a first registration request from a terminal device; the first network device receives a second registration request from the terminal device.

The first registration request may include a network type registration request or an IMS registration request; the first registration request carries first information; the second registration request may include a network type registration request or an IMS registration request; the second registration request carries second information. The network type registration request can be divided into a 4G registration request, a 5G registration request and a 6G registration request according to different network types.

Illustratively, the first network device determines that the terminal device is installed with the first card according to the identifier of the terminal device, the information of the first card, and/or the card slot information of the first information in the first registration request. The first network equipment establishes the association information between the first card and the terminal equipment and stores the association information into a self database. Similarly, the first network device stores the association information of the second card and the terminal device in its own database.

It will be appreciated that when a user first inserts the card into the terminal device card slot, the network device may create and store association information of the terminal device and the card in the database. When the subsequent terminal device meets the registration condition and sends the registration request again, the network device can acquire new associated information of the terminal device and the card. The network equipment judges whether the new associated information is consistent with the previously stored associated information, and if so, the database is not updated; and if the correlation information is inconsistent with the previous correlation information, the new correlation information covers the previous correlation information, and the network equipment updates the database.

S802, the first network equipment establishes a binding relationship between the first card and the second card.

The database of the first network device stores the association information between the terminal device and the first card and the association information between the terminal device and the second card. The first network terminal may determine that the first card and the second card are both associated with the same terminal device based on the association information, and then the first card and the second card are respectively installed in two card slots of the terminal device. Based on this, the first network device establishes a binding relationship between the first card and the second card.

Optionally, the first network device generates a timestamp when establishing the binding relationship between the first card and the second card. And the first network equipment correspondingly stores the binding relation and the time stamp into a database. And when the first information and the second information have changes and/or conflicts, determining the updated information according to the time stamp so as to improve the reliability of call forwarding based on the network side.

And S803, when the first network equipment cannot successfully establish a called call with the first card of the terminal equipment, the first network equipment initiates a call to the second card of the terminal equipment based on the binding relationship.

For example, the user 1 holds the terminal device 1 mounted with the first card and the second card. The subscriber 2 calls the first card of the subscriber 1 via the terminal device 2. After the first network device receives the first card call initiating request from the terminal device 2, the first network device calls the first card of the terminal device 1 to establish the communication activity between the user 2 and the user 1. For the reasons described above in the background, the first card of user 1 cannot answer the call of user 2 at this time. When the first network equipment cannot successfully establish a called call with the first card, the first network equipment checks the binding condition of the first card in a database of the first network equipment. When the first card has a second card bound with the first card, the first network equipment initiates a call to the second card. At this time, the terminal device 1 can communicate with the terminal device 2 based on the second card.

According to the calling method provided by the embodiment of the application, when the dual cards held by the user are managed by the first network equipment, the binding relationship between the first card and the second card can be established based on the first network equipment. The first card of the terminal equipment can not be timely, and the network equipment can initiate a call to the second card of the terminal equipment based on the binding relationship, so that the condition that the terminal equipment omits incoming call information is reduced, and the conversation use experience of a user is improved.

Optionally, a step S801.1 may be further included between step S801 and step S802: the first network equipment sends a registration acceptance message to the terminal equipment, wherein the acceptance message comprises information used for indicating whether the first network equipment supports setting of an unreachable call forwarding identifier based on the same equipment double-card binding relationship. The terminal equipment can know the support condition of the network for setting the unreachable call forwarding characteristic based on the same equipment double-card binding relation based on the identification information.

The steps of the calling method provided in the embodiment of the present application are described above when the first card and the second card belong to the same network device. It will be appreciated that in a possible implementation, the user may have handled two cards of different operators, that is, in the case where the number of the first network device refers to two, the first card and the second card belong to different operator network devices. The above steps S501 to S503 will be briefly described with reference to fig. 9 by taking as an example the case where the first card and the second card are managed by different network devices.

Illustratively, as shown in FIG. 9, the first card is attributed to a first network and the second card is attributed to a second network.

S901, a first network device receives a first registration request from a terminal device, and a second network device receives a second registration request from the terminal device.

The first registration request comprises a network standard registration request or an IMS registration request; the first registration request carries first information; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information.

The first network device may establish association information of the first card and the terminal device based on the first information, and store the association information to the database. The second network device may establish association information of the second card and the terminal device based on the second information and store the association information in the database.

The first network device and the second network device may communicate directly or indirectly based on a subscription relationship between operators. For example, the second network device may send the association information of the terminal device and the second card to the first network device, so that the first network device receives the second information of the terminal device. And the first network equipment stores the second information of the terminal equipment in a self database. Similarly, the second network device acquires the first information in the same manner.

S902, the network equipment establishes a binding relationship between the first card and the second card.

Because the information intercommunication between the network devices, the database of the first network device stores the first information and the second information, and the database of the second network device also stores the first information and the second information. The first network device and the second network device can establish a binding relationship between the first card and the second card based on the first information and the second information. Similar to step S802, further description is omitted here.

And S903, when the first network device cannot successfully establish a called call with the first card of the terminal device, the first network device transfers the call to a second network device based on the binding relationship, and the second network device initiates the call to the second card of the terminal device.

Illustratively, the user 1 holds a terminal device 1 in which a first card and a second card are installed. The subscriber 2 calls the first card of the subscriber 1 via the terminal device 2. After the first network device receives the request for initiating the first card call from the terminal device 2, the first network device calls the first card of the terminal device 1 to establish a communication activity between the user 2 and the user 1. The first card of user 1 cannot answer the call of user 2 at this time for the reasons of user unreachability in the above-mentioned background art. When the called call with the first card cannot be successfully established, the first network equipment acquires second card information which is in binding relation with the first card. The first network device notifies the second network device of the first card being unreachable. The second network device initiates a call to the second card, so that the terminal device 1 communicates with the terminal device 2 using the second card.

According to the calling method provided by the embodiment of the application, the terminal equipment sends the first information to the first network equipment, the second information is sent to the second network equipment, and after the information of the network equipment is intercommunicated, the first card and the second card can be judged to be installed on the same terminal equipment. The network equipment establishes a binding relationship between the first card and the second card, and when the first card of the terminal equipment appears untimely, the network equipment can initiate a call to the second card of the terminal equipment based on the binding relationship. When the user holds cards of different operators, the method can also carry out call forwarding based on the network side, thereby reducing the condition that the terminal equipment misses the incoming call information and improving the conversation use experience of the user.

Step S901 to step S903 in the embodiments of the present application are described in detail below with reference to the flowchart of fig. 10 by taking an example that the first card and the second card are managed by different operator network devices. It should be noted that the flow of steps S801 to S803 in this embodiment is similar to this embodiment, and is not described here again. Exemplarily, fig. 10 shows specific steps of a calling method according to an embodiment of the present application, where in fig. 10:

s1001, the terminal device sends a first registration request to the first network device.

The first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information. The network type registration request comprises a 4G registration request, a 5G registration request and/or a 6G registration request.

The terminal device sends a registration request to the network device, and when an event occurs and is not limited to: the terminal device sends a first registration request to the first network device, where the first registration request may carry an identifier IMEI1+ IMEI2 or SN representing a unique device number of the terminal device and a unique identifier associated with the first card number MSISDN1, and the identifier may include but is not limited to IMSI, IMPI, sui, GUTI, 5G-GUTI, and the like.

S1002, the first network equipment sends a registration acceptance message to the terminal equipment, wherein the acceptance message comprises indication information used for indicating whether the first network equipment supports setting of unreachable call forwarding characteristics based on the same equipment double-card binding relationship.

After the first network device receives the first registration request, the first network device sends a registration acceptance message to the terminal device to inform the terminal device of successful registration. And meanwhile, the acceptance message can carry identification information to indicate whether the first network equipment supports the characteristic of setting unreachable call forwarding based on the same equipment dual-card binding relationship.

S1003, the first network equipment judges whether the first associated information of the terminal equipment and the first card in the first information is changed, and if yes, the first information is sent to the second network equipment.

And after the first network equipment acquires the first information, establishing the associated information of the terminal equipment and the first card, and storing the associated information into a database. If the associated information is changed, updating the database according to the time stamp of the first information, and keeping the current associated information. The first network device and the second network device can communicate with each other. After the database of the first network device is updated, the first network device sends the updated first information to the second network device.

S1004, the terminal device sends a second registration request to the second network device.

The second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information; the second information includes an identifier of the terminal device and information of a second card in the terminal device. The network type registration request comprises a 4G registration request, a 5G registration request and/or a 6G registration request.

S1005, the second network device sends a registration acceptance message to the terminal device, where the acceptance message includes information indicating whether the second network device supports setting of the unreachable call forwarding feature based on the same device dual-card binding relationship.

And S1006, the second network device judges whether second associated information of the terminal device and the second card in the second information is changed, and if yes, the second information is sent to the first network device.

The call method flow provided in this embodiment adopts the sequence of steps S1001 to S1006, and it can be understood that steps S1001 to S1003 and steps S1004 to S1006 can be performed simultaneously, that is, the terminal device can simultaneously send registration requests to the first network terminal and the second network terminal, and the application does not limit the registration sequence of the first card and the second card.

S1007, the first network device and/or the second network device establish a binding relationship between the first card and the second card.

In a possible manner, a database of the first network device includes first information sent by the terminal device and second information sent by the second network device, and the first network device establishes a binding relationship between the first card and the second card based on the first information and the second information.

The database of the second network device comprises second information sent by the terminal device and first information sent by the first network device, and the second network device establishes a binding relationship between the first card and the second card based on the first information and the second information.

In another possible approach, there is an update of information in one network device and no update of information in another network device. And establishing a new binding relationship between the first card and the second card by the network equipment in the updated state, and sending the binding relationship to the other network equipment. The method for establishing the binding relationship between the first card and the second card by the network device is not limited.

S1008, the first network device initiates a call to a first card of the terminal device. If the first card of the terminal device does not respond, S1009 is executed. If the first card of the terminal device responds to the call of the first network device, the call is executed according to the communication mode in possible implementation.

S1009, the first network device determines whether the terminal device presets a target card for call forwarding of the first card. If the terminal equipment presets a target card, the first network equipment initiates a call to the target card; if the terminal device does not preset the target card, step S1010 is executed.

The operator opens the call forwarding service which is not reachable by the user, and the user can manually set the call forwarding service on the terminal equipment. For example, as shown in a in fig. 11, the user may click on the "talk" icon on the terminal device home interface. The terminal device enters an interface shown as b in fig. 11, the interface is provided with a "set menu" button, and after the button is clicked, the terminal device enters an interface shown as c in fig. 11. The user can set the call mode on the interface, and when the user has a call forwarding requirement, the user selects an "call forwarding" option on the interface, and the terminal device enters the call forwarding setting interface shown as d in fig. 11. After the user selects and sets the target card for transferring between the first card and the second card, for example, after the user selects and sets the first card, the terminal device responds to the touch operation and enters an interface as shown in e in fig. 11, in the interface, the user may manually input the card number of the target card for transferring when the user cannot connect to the first card, and the target card may be the second card or a card other than the first card and the second card. And after the input is finished, the user clicks the opening key. The terminal device starts the call forwarding service of the first card and enters an interface shown as f in fig. 11, and the card number of the unreachable target card set with the first card is displayed in the interface. It will be appreciated that the user may set the target cards for the first card and the second card in other ways.

In a possible implementation, although the operator opens the unreachable call forwarding service, the call forwarding menu is often hidden (as shown in fig. 11), and the manual call opening rate of the unreachable call forwarding service is low when the user does not know that the terminal device supports call forwarding or does not know how to set call forwarding.

Optionally, S1010, the first network device determines whether the switch is turned on; a switch is arranged in the first network equipment; if the switch is turned on, step S1011 is executed, otherwise, the call is ended.

And S1011, the first network equipment initiates a call to a second card of the terminal equipment based on the binding relationship.

When the switch is turned on, the first network device checks the binding relationship of the first card in the database, and if the first card is bound with the second card, the first network device notifies the second network device, so that the second network device initiates a call to the second card based on the binding relationship.

And when the second card is not reachable to call forwarding, the second network equipment initiates a call to the first card of the terminal equipment based on the binding relationship. The method comprises the following specific steps:

s1012, the second network device initiates a call to the second card of the terminal device. If the second card of the terminal device does not respond, S1013 is executed. If the second card of the terminal device responds to the call of the second network device, the call is executed according to the call mode in possible implementation.

And S1013, the second network equipment judges whether the terminal equipment presets a target card for call forwarding of the second card. If the terminal equipment presets the target card, the second network equipment initiates a call to the target card; if the terminal device does not preset the target card, step S1014 is executed.

Optionally, in S1014, the second network device determines whether the switch is turned on; a switch is arranged in the second network equipment; if the switch is turned on, step S1015 is executed, otherwise, the call is ended.

And S1015, the second network device initiates a call to the first card of the terminal device based on the binding relationship.

Steps S1012-S1015 are similar to steps S1008-S1011, and are not described herein.

In the calling method provided in this embodiment, steps S1001-S1006 are executed to register the first card and the second card of the terminal device, where the network device receives a registration request from the terminal device, and the registration request may include a network type request and an IMS registration request. Taking IMS registration request as an example, the registration process of the first card registration request in steps S1001 to S1003 will be described in detail with reference to steps S1101 to S1105, and the registration process of the second card in steps S1004 to S1006 is similar to that, and will not be described again here.

It can be understood that, in the scenarios of starting up, hot plug-in card insertion, and flight mode closing, etc., the terminal device supporting the IMS sends an IMS registration request to the network device after the terminal device is on the internet. After IMS registration is successful, the card of the terminal device can perform IMS communication with the network device. The method comprises the following specific steps:

s1101, the terminal device sends an IMS registration request of the first card to the first network device.

When the card carries out IMS registration, the terminal sends an initial sip registration request (Register) of the IMS registration, and the carried equipment identification can be carried in a Contact header field through extension.

Illustratively, when the terminal device sends an IMS registration request of the first card to the first network device, part of the content of the Contact header field is:

instance = "< urn: gsma: IMEI: xxxxxxxxxxxx-xxxxxx-0 >",// may correspond to IMEI1

+ sip. Instance2= "< urn: gsma: IMEI: xxxxxxxxxx-xxxxxx-1 >"// may correspond to IMEI2

Wherein + sip. Instance2 is extended.

Optionally, the Contact may further include card slot information, where sub =1 denotes the first card slot. The identity of the terminal equipment is IMEI1+ IMEI2.

+sip.sn＝"xxxxxx"

sn is an extension.

Optionally, the Contact may further include card slot information, where sub =1 denotes the first card slot. The identity of the terminal device is SN.

In addition, when the terminal device reports the IMS registration request, the Register also carries IMPI information corresponding to the MSIDSN of the first card.

S1102, the first network device authenticates the IMS registration request, and sends 401 an unauthorized message (unauthorized) to the terminal device.

The first network device processes the register request in response to the IMS registration request. If the terminal device is not authenticated in the first network device, the first network device sends a 401 message to the terminal device.

S1103, the terminal device sends an IMS registration authentication message of the first card to the first network device.

The terminal equipment authenticates the network by the terminal on the 401 authentication information of the network, sends a register message to the network after the authentication is passed, carries the authentication information calculated by the terminal side based on the first card secret key, and authenticates the terminal by the network.

S1104, the first network device sends a 200OK message of IMS registration acceptance to the terminal device.

The first network device checks the authentication information in the IMS registration authentication message, and if the authentication is passed, the first network device sends a 200OK response message to the terminal device, wherein the 200OK response message is used for indicating that the first network device has accepted the IMS registration. The 200OK message of the IMS registration carries an identifier to indicate whether the network supports setting an unreachable call forwarding feature based on the same device dual card binding relationship. For example, if the network side supports the feature, the extended device identifier information and the sub information may be carried in the 200OK response message, or otherwise, if the network side does not support the feature, the extended device identifier information and the sub information are not carried. Based on the method, the terminal equipment can know whether the network side supports the characteristic of setting unreachable call forwarding based on the same equipment double-card binding relationship.

S1105, the first network device judges the associated information of the terminal device and the first card, and if the associated information changes, the first message is sent to the second network device.

And after the first network equipment acquires the first information, checking the correlation information between the IMEI or SN of the terminal equipment and the first card. And the first network equipment judges whether the associated information is changed or not, and if the associated information is changed, the first network equipment updates the database of the associated information according to the time sequence of the time stamp. And the first network equipment informs the second network equipment of the updated associated information.

The calling method provided by the embodiment of the application can send the information of the terminal equipment and the card to the network equipment based on the IMS registration, the 4G registration and the 5G registration processes, so that the network equipment establishes the binding relationship between the first card and the second card for the bridge according to the terminal equipment identification, and the unreachable call transfer characteristic based on the double-card binding relationship is controlled and realized on the network side. The method reduces the condition that the terminal equipment misses the incoming call information, and improves the conversation use experience of the user.

The above embodiment shows specific steps of steps S501 to S503, and it is understood that, in addition to the above steps S1001 to S1015, the method further includes:

optionally, S1016, the terminal device sends a deregistration request to the network device.

In step S1007, the binding relationship established by the first network device and/or the second network device may change with card change of the terminal device or card status change, and at this time, the binding relationship needs to be released or the correspondence between the card and the device stored on the network side needs to be cleared. When the terminal device meets a de-registration request, for example, but not limited to, shutdown, start of flight mode, card pulling and the like of the terminal device, the terminal device sends the de-registration request to the network device; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card; after receiving the deregistration request from the terminal equipment, the network equipment invalidates the binding relationship between the first card and the second card of the terminal equipment or clears the corresponding relationship between the cards and the equipment stored at the network side.

The method provided by the embodiment can update the binding relationship in the database of the network equipment in real time so as to ensure the accuracy of the unreachable call forwarding method based on the double-card binding relationship realized on the network side.

It should be understood that the interface of the terminal device provided in the embodiment of the present application is only an example, and is not limited to the embodiment of the present application.

The method provided by the embodiment of the present application is described above with reference to fig. 1 to 11, and the related apparatus for performing the method provided by the embodiment of the present application is described below.

As shown in fig. 12, fig. 12 is a network device for executing a call method according to an embodiment of the present application, where the network device may be a network device in the embodiment of the present application, and may also be a chip or a system-on-chip in the network device.

Illustratively, the network device 320 includes: a processing device 1201 and a transmitting/receiving device 1202. The processing device 1201 is configured to support the network device to perform the step of information processing in the calling method, and the transceiver 1202 is configured to support the network device to perform the step of receiving or transmitting.

Specifically, in the network device 320 provided in the embodiment of the present application, the network device 320 may include a first network device and/or a second network device. The transceiver 1202 receives the first information and the second information from the terminal device; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment; the processing device 1201 establishes a binding relationship between the first card and the second card; when the processing device 1201 cannot successfully establish a called call with the first card of the terminal device, the processing device 1201 initiates a call to the second card of the terminal device based on the binding relationship.

In a possible implementation manner, the transceiver 1202 receives the first information and the second information from the terminal device, and includes: the transceiver 1202.1 of the first network device receives the first registration request from the terminal device; the first registration request comprises a network standard registration request or an IMS registration request; the first registration request carries first information; the transceiver 1202.1 of the first network device receives the second registration request from the terminal device; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information.

In a possible implementation manner, the transceiver 1202 receives the first information and the second information from the terminal device, and includes: the transceiver 1202.1 of the first network device receives the first registration request from the terminal device; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information; the transceiver 1202.1 of the first network device receives second information from the transceiver 1202.2 of the second network device, wherein the second information is acquired by the transceiver 1202.2 of the second network device based on the second registration request received from the terminal device; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information.

In a possible implementation manner, after the transceiver 1202 receives the first registration request from the terminal device, the method further includes: the transceiver 1202 sends a registration acceptance message to the terminal device, where the acceptance message includes information indicating whether the first network device supports setting of unreachable call forwarding based on the same device dual-card binding relationship.

In one possible implementation, a deregistration request is received from the terminal device at the transceiving means 1202; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card; processing apparatus 1201 invalidates the binding based on the deregistration request.

In a possible implementation manner, when the processing device 1201 cannot successfully establish a called call with a first card of a terminal device, the processing device 1201 initiates a call to a second card of the terminal device based on a binding relationship, including: when the processing device 1201 cannot successfully establish a called call with a first card of the terminal device, the processing device 1201 judges whether the terminal device presets a target card for call forwarding of the first card; if the terminal device does not have a preset target card, the processing device 1201 initiates a call to a second card of the terminal device based on the binding relationship.

In a possible implementation manner, the network device 320 further includes a switch device; if the terminal device does not have a preset target card, the processing apparatus 1201 initiates a call to a second card of the terminal device based on the binding relationship, including: if the terminal device does not have a preset target card, the processing device 1201 judges whether the switch device is turned on; when the switch device is turned on, the processing device 1201 initiates a call to the second card of the terminal device based on the binding relationship.

In a possible implementation manner, the network device 320 further includes a storage 1203. The processing means 1201, the transmitting and receiving means 1202 and the storage means 1203 are connected by lines. The storage 1203 may include one or more memories, which may be one or more devices, circuits, or other means for storing programs or data. The storage device 1203 may be configured to store the first information and the second information received by the transceiver 1202, the association information between the first information and the terminal device, the association information between the second information and the terminal device, the binding information between the first card and the second card, and the like.

The following describes the terminal device 330 that performs the above-described calling method according to the embodiment of the present application. As shown in fig. 13, fig. 13 is a schematic structural diagram of a terminal device provided in this embodiment, where the terminal device 330 may be the terminal device in this embodiment, or may be a chip or a chip system in the terminal device.

As shown in fig. 13, the terminal device 330 may be used in a communication device, circuit, hardware component, or chip, and includes: a processor 1302, interface circuitry 1303, and a display 1304. Wherein, the display screen 1304 is used to support the display steps of the calling method execution; the processor 1302 is configured to support the terminal device to perform the information processing step, and the interface circuit 1303 is configured to support the terminal device to perform the receiving or transmitting step. The terminal device is a multi-card multi-standby mobile terminal, and in order to distinguish interface circuits 1303 of different cards, the interface circuits 1303 may include an interface circuit 1303.1 of a first card and an interface circuit 1303.2 of a second card in the terminal device. The display screen 1304 may also be referred to as a display unit; the processor 1302 may also be referred to as a processing unit and the interface circuit 1303 may also be referred to as a communication unit.

Specifically, in the terminal device 330 provided in this embodiment of the present application, the interface circuit 1303.1 of the first card sends the first information to the first network device; the interface circuit 1303.2 of the second card sends the second information to the first network device and/or the second network device; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment; the interface circuit 1303.2 of the second card receives a call initiated by the first network device or the second network device based on the binding relationship; the binding relationship is a binding relationship between the first card and the second card, which is established by the first network device and/or the second network device.

In one possible implementation manner, the sending, by the interface circuit 1303.1 of the first card, the first information to the first network device includes: the interface circuit 1303.1 of the first card sends a first registration request to the first network device; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries first information.

In a possible implementation manner, the interface circuit 1303.2 of the second card sends the second information to the first network device and/or the second network device, where the sending includes: the interface circuit 1303.2 of the second card sends a second registration request to the first network device and/or the second network device; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries second information.

In one possible implementation manner, after the interface circuit 1303.1 of the first card sends the first registration request to the first network device, the method includes: the interface circuit 1303 receives a registration accept message from the first network device, where the accept message includes information indicating whether the first network device supports setting of unreachable call forwarding based on the same device dual card binding relationship.

In a possible implementation manner, the interface circuit 1303 sends a deregistration request to the first network device, so that the first network device invalidates the binding relationship based on the deregistration request; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card.

In one possible implementation, the processor 1302 sends a deregistration request to the first network device when detecting a card unplugging event, a shutdown event, and/or an on-flight mode event.

In a possible embodiment, the terminal device may further include: a reservoir 1301. The storage 1301, the processor 1302, the interface circuit 1303, and the display 1304 are connected by lines. A memory may also be referred to as a storage unit.

The storage unit 1301 may include one or more memories, which may be devices in one or more devices or circuits for storing programs or data.

The storage unit 1301 may stand alone and be connected to the processor 1302 provided in the terminal device via a communication line. The memory unit 1301 may be integrated with the processor 1302.

The memory unit 1301 may store computer-executable instructions of the methods in the terminal device to cause the processor 1302 to perform the methods in the above-described embodiments.

The memory unit 1301 may be a register, a cache, a Random Access Memory (RAM), or the like, and the memory unit 1301 may be integrated with the processor 1302. The memory unit 1301 may be a read-only memory (ROM) or other type of static storage device that may store static information and instructions, and the memory unit 1301 may be separate from the processor 1302.

In a possible implementation manner, the computer execution instructions in the embodiment of the present application may also be referred to as application program codes, which is not specifically limited in the embodiment of the present application.

Optionally, the interface circuit 1303 may further include a transmitter and/or a receiver. Optionally, the processor 1302 may include one or more Central Processing Units (CPUs), and may also be other general-purpose processors, digital Signal Processors (DSPs), application Specific Integrated Circuits (ASICs), and the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor, or in a combination of the hardware and software modules in the processor.

The embodiment of the application also provides a computer readable storage medium. The methods described in the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media may include computer storage media and communication media, and may include any medium that can communicate a computer program from one place to another. A storage medium may be any target medium that can be accessed by a computer.

In one possible implementation, the computer-readable medium may include RAM, ROM, a compact disk read-only memory (CD-ROM) or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes disc, laser disc, optical disc, digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processing unit of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processing unit of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

The above embodiments are only for illustrating the embodiments of the present invention and are not to be construed as limiting the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the embodiments of the present invention shall be included in the scope of the present invention.

Claims

1. A method for calling, the method comprising:

the method comprises the steps that first network equipment receives first information of a first card and second information of a second card from terminal equipment respectively; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment;

the first network device determines that the first card and the second card are respectively installed in the terminal device based on the first information and the second information, and establishes a binding relationship between the first card and the second card;

and when the second card is in a conversation period and the first network equipment cannot successfully establish a called call with the first card of the terminal equipment, the first network equipment initiates a call to the second card of the terminal equipment based on the binding relationship.

2. The method of claim 1, wherein the identification of the terminal device comprises: the first international mobile equipment identity IMEI and the second IMEI of the terminal equipment, and/or the SN serial number of the terminal equipment.

3. The method of claim 2, wherein the first information further includes information of a card slot into which the first card is inserted, and the second information further includes information of a card slot into which the second card is inserted.

4. The method of any of claims 1-3, wherein the first network device receives the first information and the second information from the terminal device, comprising:

the first network equipment receives a first registration request from the terminal equipment; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries the first information;

the first network equipment receives a second registration request from the terminal equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries the second information.

5. The method of any of claims 1-3, wherein the first network device receives the first information and the second information from the terminal device, comprising:

the first network device receives the second information from a second network device, wherein the second information is acquired by the second network device based on a second registration request received from the terminal device; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries the second information.

6. The method according to claim 4 or 5, wherein after the first network device receives the first registration request from the terminal device, the method further comprises:

and the first network equipment sends a registration acceptance message to the terminal equipment, wherein the acceptance message comprises information for indicating whether the first network equipment supports setting of unreachable call forwarding based on the same equipment double-card binding relationship.

7. The method of any one of claims 1-6, further comprising:

receiving a deregistration request from the terminal equipment at the first network equipment; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card;

the first network device invalidates the binding based on the deregistration request.

8. The method according to claim 7, wherein the de-registration request is sent by the terminal device upon detecting a card unplugging event, a shutdown event and/or an on-flight mode event.

9. The method of any of claims 1-6, wherein the binding relationship identifies a timestamp of when the binding relationship was generated.

10. The method according to any of claims 1-9, wherein when the first network device fails to successfully establish a called call with the first card of the terminal device, the first network device initiates a call to the second card of the terminal device based on the binding relationship, comprising:

when the first network equipment cannot successfully establish a called call with a first card of the terminal equipment, the first network equipment judges whether the terminal equipment is preset with a target card for call forwarding of the first card;

and if the target card is not preset in the terminal equipment, the first network equipment initiates a call to a second card of the terminal equipment based on the binding relationship.

11. The method of claim 10, wherein a switch is disposed in the first network device; if the target card is not preset in the terminal device, the first network device initiates a call to a second card of the terminal device based on the binding relationship, including:

if the target card is not preset in the terminal equipment, the first network equipment judges whether the switch is started or not;

and when the switch is on, the first network equipment initiates a call to a second card of the terminal equipment based on the binding relationship.

12. A method for calling, the method comprising:

a first card of the terminal equipment sends first information to first network equipment; a second card of the terminal equipment sends second information to the first network equipment and/or second network equipment; the first information comprises an identifier of the terminal equipment and information of a first card in the terminal equipment, and the second information comprises the identifier of the terminal equipment and information of a second card in the terminal equipment;

the second card of the terminal equipment receives a call initiated based on a binding relationship when the first network equipment or the second network equipment cannot successfully establish a called call with the first card of the terminal equipment during the conversation of the first card; the binding relationship is the binding relationship between the first card and the second card, which is established by the first network device and/or the second network device respectively installing the first card and the second card in the terminal device based on the first information and the second information.

13. The method of claim 12, wherein the identification of the terminal device comprises: the first international mobile equipment identity IMEI and the second IMEI of the terminal equipment, and/or the serial number of the terminal equipment.

14. The method of claim 13, wherein the first information further includes information of a card slot into which the first card is inserted, and the second information further includes information of a card slot into which the second card is inserted.

15. The method according to any of claims 12-14, wherein the terminal device sends the first information to the first network device, comprising:

the terminal equipment sends a first registration request to the first network equipment; the first registration request comprises a network type registration request or an IMS registration request; the first registration request carries the first information.

16. The method according to any of claims 12-14, wherein the terminal device sends second information to the first network device and/or the second network device, comprising:

the terminal equipment sends a second registration request to the first network equipment and/or the second network equipment; the second registration request comprises a network type registration request or an IMS registration request; the second registration request carries the second information.

17. The method according to claim 15 or 16, wherein after the terminal device sends the first registration request to the first network device, the method comprises:

and the terminal equipment receives a registration acceptance message from the first network equipment, wherein the acceptance message comprises information for indicating whether the first network equipment supports setting of unreachable call forwarding based on the same equipment double-card binding relationship.

18. The method according to any one of claims 12-17, further comprising:

the terminal device sends a deregistration request to the first network device so that the first network device invalidates the binding relation based on the deregistration request; the deregistration request comprises the identification of the terminal equipment, the information of the first card and/or the information of the second card.

19. The method of claim 18, further comprising:

and when the terminal equipment detects a card pulling event, a shutdown event and/or an airplane mode starting event, the terminal equipment sends the registration removing request to the first network equipment.

20. A network device, comprising: processing means for performing the steps of processing in the method of any one of claims 1-11, and transceiving means for performing the steps of communicating with other devices in the method of any one of claims 1-11.

21. A terminal device, comprising: a processor, interface circuitry for communicating with other devices, the processor for performing the steps processed in the method of any of claims 12-19, and a display for performing the steps displayed in the method of any of claims 12-19.

22. A computer-readable storage medium having instructions stored thereon that, when executed, cause a computer to perform the method of any of claims 1-19.