Call management method and device

Abstract

The invention relates to a call management method and device. The invention relates to the technical field of communication, and solves the problem that user experience is affected by call failure. The method comprises the following steps: detecting a connection state of UE after receiving a call notification; and when the UE is in a call state and the call notification indicates that the UE falls back to other network architecture, pausing transmission of the call notification, and sending prompt information for the call notification until the current call is ended. The technical scheme provided by the invention is suitable for a call scene in a 4G / 5G network architecture, and high-reliability and high-quality call service is realized.

Description

Technical Field

[0001] This disclosure relates to the field of communication technology, and in particular to a call management method and apparatus. Background Technology

[0002] IP Multimedia Subsystem Call (IMS Call) is a voice call solution for 4G / 5G networks. Depending on the access method, it can be further divided into Voice over LTE (VoLTE) and Voice over New Radio (VoNR). Due to differences in network infrastructure maturity, the continued use of 2G / 3G networks, and factors such as internal network routing or network load, some IMS Calls are converted to Circuit Switched (CS) domain calls. Upon receiving a CS Call notification, a User Equipment (UE) residing in a 5G network will first perform a Tracking Area Update (TAU) to the 4G network, and then fall back to the 2G / 3G network architecture to process the call.

[0003] For a UE that is in the middle of a call, the processing of a CS domain call will trigger the UE to first release the current call and then fall back to the 2G / 3G network architecture, causing the UE's current call to fail (call drop), which seriously affects the user experience. Summary of the Invention

[0004] To overcome the problems existing in related technologies, this disclosure provides a call management method and apparatus. By performing processing such as temporarily holding call notifications received by the UE during a call, the problem of call failures affecting user experience is solved.

[0005] According to a first aspect of the present disclosure, a call management method is provided, comprising:

[0006] Detect the UE's connection status after receiving a call notification;

[0007] If the UE is in a call and the call notification indicates that the UE should fall back to another network architecture, the transmission of the call notification is suspended until the current call ends and a prompt message for the call notification is issued.

[0008] Furthermore, the call notification includes a circuit-switched service notification (CS Service Notification), which instructs the UE to fall back to a 2G network and / or a 3G network.

[0009] Furthermore, the step of suspending the transmission of the call notification when the UE is in a call state and the call notification indicates that the UE has fallen back to another network architecture, until the current call ends and a prompt message for the call notification is issued, includes:

[0010] Add the call notification to the paging message queue;

[0011] After the current call ends, the call notification in the Paging queue is retrieved and a corresponding prompt message is sent.

[0012] Furthermore, the call notification includes a voice initiation message (Invite), and after the step of detecting the UE's connection status upon receiving the call notification, it further includes:

[0013] When the UE is in a connected but not in a call state, the call notification is sent to the No Access Layer (NAS).

[0014] Furthermore, the call notification includes paging, the call notification includes an invite message, and after the step of detecting the UE's connection status upon receiving the call notification, it further includes:

[0015] When the UE is in an idle state, the call notification is sent to the NAS.

[0016] According to a second aspect of the present disclosure, a call management device is provided, comprising:

[0017] The paging filtering module is used to detect the connection status of the UE after receiving a call notification;

[0018] The call hold module is used to suspend the transmission of the call notification when the UE is in a call state and the call notification indicates that the UE falls back to another network architecture, until the current call ends and a prompt message for the call notification is issued.

[0019] Furthermore, the call notification includes a CS Service Notification, which instructs the UE to fall back to a 2G network and / or a 3G network. The call hold module includes:

[0020] The queue management submodule is used to add the call notification to the Paging queue;

[0021] The prompt submodule is used to extract the call notification from the Paging queue and issue the corresponding prompt information after the current call ends.

[0022] Furthermore, the device also includes:

[0023] The inactive call management module is used to send the call notification to the NAS when the UE is in a connected but no-call state, and the call notification includes Invite;

[0024] The idle call management module is used to send the call notification to the NAS when the UE is in an idle state. The call notification includes Paging.

[0025] According to a third aspect of the present disclosure, a computer apparatus is provided, comprising:

[0026] processor;

[0027] Memory used to store processor-executable instructions;

[0028] The processor is configured as follows:

[0029] Detect the UE's connection status after receiving a call notification;

[0030] If the UE is in a call and the call notification indicates that the UE should fall back to another network architecture, the transmission of the call notification is suspended until the current call ends and a prompt message for the call notification is issued.

[0031] According to a fourth aspect of the present disclosure, a non-transitory computer-readable storage medium is provided, wherein when instructions in the storage medium are executed by a processor of a mobile terminal, the mobile terminal is enabled to perform a call management method, the method comprising:

[0032] Detect the UE's connection status after receiving a call notification;

[0033] If the UE is in a call and the call notification indicates that the UE should fall back to another network architecture, the transmission of the call notification is suspended until the current call ends and a prompt message for the call notification is issued.

[0034] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: after receiving a call notification, the connection status of the UE is detected, and if the UE is in a call state and the call notification indicates that the UE should fall back to another network architecture, the transmission of the call notification is suspended until the current call ends, at which point a prompt message for the call notification is issued. This terminates the network architecture fallback process during a call, solves the problem of call failure caused by CS domain calls, ensures call quality under 4G / 5G network architectures, and improves user experience.

[0035] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0037] Figure 1 This is a schematic diagram illustrating a working scenario where a UE makes a call under an exemplary 4G / 5G network architecture.

[0038] Figure 2 This is a schematic diagram illustrating the principle of an exemplary voice fallback process.

[0039] Figure 3 This is a flowchart illustrating a call management method according to an exemplary embodiment.

[0040] Figure 4 This is a flowchart illustrating yet another call management method according to an exemplary embodiment.

[0041] Figure 5 This is a schematic diagram illustrating the implementation principle of another call management method according to an exemplary embodiment.

[0042] Figure 6 This is a block diagram illustrating a call management device according to an exemplary embodiment.

[0043] Figure 7 This is a block diagram of a call holding module 602 according to an exemplary embodiment.

[0044] Figure 8 This is a block diagram illustrating yet another call management device according to an exemplary embodiment.

[0045] Figure 9 This is a block diagram illustrating an apparatus according to an exemplary embodiment. Detailed Implementation

[0046] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0047] For UEs that are in the middle of a call, processing a CS domain call will trigger the UE to first release the current call and then fall back to the 2G / 3G network architecture, causing the UE's current call to drop, which seriously affects the user experience.

[0048] To address the aforementioned issues, embodiments of this disclosure provide a call management method and apparatus. By suspending the transmission of call notifications by the UE during a call, the network architecture fallback process during the call is terminated, resolving the problem of call failure caused by CS domain calls, ensuring call quality under 4 / 5G network architecture, and improving user experience.

[0049] First, the call process in 4G / 5G scenarios will be described to better understand the technical solutions provided by the embodiments of the present invention. For example... Figure 1 The diagram illustrates a typical UE (User Equipment) call scenario within a 4G / 5G network architecture. The UE establishes a series of bearers between the core network and IMS network elements to generate an end-to-end logical connection for voice calls, enabling the UE to use voice call services stably and securely. For example, a Public Data Network (PDN) / Protocol Data Unit (PDU) connection is established between the UE and the 5G system (5GS), and an IP connection is established between the 5GS and IMS.

[0050] In the existing 4G / 5G network architecture, the network uses fallback to maintain compatibility with voice services in older network standards. For example... Figure 2 As shown, a call connection is established between the UE and IMS. Specifically, in a 5G network, the UE uses Evolved Packet System Fallback (EPS Fallback, or EPSFB) to fall back to the 4G network to handle VoLTE synchronization requirements; in a 4G network, the UE uses Circuit Switched Fallback (CS Fallback, or CSFB) to handle call requirements in the 2G / 3G network. Because the 5G network does not have an interface with the 2G / 3G network, during VoNR, the UE will first fall back to the 4G network, and then further fall back through the interface with the 2G / 3G network.

[0051] In 4G networks, the Mobility Management Entity (MME) is responsible for handling NAS signaling communication between the UE and the network, primarily managing UE mobility and session management. In 5G networks, the MME is split into two elements: the Access and Mobility Management Function (AMF) and the Session Management Function (SMF). The AMF handles mobility-related processes, while the SMF is responsible for session establishment and maintenance. The gNodeB exchanges N2 signaling with the AMF and sends a CS Service Notification to the UE. The UE establishes an end-to-end link to meet the user's call needs through a logical connection formed by the Data Radio Bearer (DRB) and S1 bearer. In 4G networks, the MME interacts with the AMF through port N26.

[0052] In the context of 4G / 5G networks being compatible with voice services through fallback network architecture, embodiments of this disclosure provide a call management method and apparatus to achieve high-quality user calls. The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0053] An exemplary embodiment of this disclosure provides a call management method, the process of which involves processing call notifications received by a UE during a call as follows: Figure 3 As shown, it includes:

[0054] Step 301: After receiving the call notification, check the connection status of the UE.

[0055] In this step, the UE receives a call notification and, upon receiving the call notification, checks the UE's connection status.

[0056] According to one exemplary implementation, the UE is in a 4G / 5G network, and its detected connection state is specifically the Radio Resource Control (RRC) state. The RRC state includes, but is not limited to, an Idle state and a Connected state. In the Connected state, an RRC connection context is established, and data transmission may occur due to services such as calls, or it may be in an inactive state.

[0057] According to one exemplary implementation, a paging filter module can be configured in the UE to filter all call notifications received by the UE and detect the UE's connection status. The call notification can specifically be a CallNotification, including but not limited to: CS Service Notification, Paging, and Invite.

[0058] Step 302: When the UE is in a call state and the call notification indicates that the UE has fallen back to another network architecture, the transmission of the call notification is suspended until the current call ends and a prompt message for the call notification is issued.

[0059] In this step, the UE is currently in a call, specifically a call on a 4G / 5G network. Upon receiving the CSService Notification, it indicates that the UE is about to receive a new call and needs to fall back to the 2G / 3G network to manage the new call.

[0060] To avoid call failures due to fallback, the UE's RRC status is checked when the UE's Paging Filter receives a call notification. If the received call notification is a CS Service Notification and the UE has an existing RRC connection, and the UE is currently in a call, the call notification is not forwarded or responded to further; instead, transmission is paused, and the current call continues until it ends, at which point a notification message is issued regarding the call notification. Otherwise, it can be directly sent to the NAS for processing. In 5G, what is blocked is the N2L (NR to LTE) process, which is the fallback process from the 5G network to the 4G network.

[0061] According to one exemplary implementation, the received call notification can be processed as follows: Figure 4 The process shown:

[0062] Step 401: Add the call notification to the Paging queue.

[0063] Specifically, in this step, if a call is in progress, the transmission of the call notification is paused, the received call notification is held, and the information of the call indicated by the call notification is saved.

[0064] According to an exemplary implementation, a paging queue can be set up to store call notifications and / or information about the call indicated by the call notification. The call notification is pushed into the paging queue to await the end of the ongoing call. This process can be referred to as a Circuit Switched Service Hold (CS Service Hold) process.

[0065] Step 402: After the current call ends, retrieve the call notification from the Paging queue and send out the corresponding prompt message.

[0066] In this step, after the current call ends, the retained call notification information is retrieved sequentially from the paging queue, and the corresponding prompt message is sent. For example, after the current call ends, the user is notified that a new call request has been made, allowing the user to proceed with the next step.

[0067] By retaining call notifications received by the UE during a call and temporarily saving them for later use instead of immediately responding and executing fallback, the problem of call failures is resolved, ensuring call quality and improving user experience.

[0068] An exemplary embodiment of this disclosure also provides a call management method and apparatus, wherein the call notification includes an Invite message, which is sent to the NAS when the UE is connected but not in a call state. According to an exemplary implementation, for a UE in an RRC connection state, an Invite message is directly sent to the UE when initiating an IMS Call. Since the Invite message does not block currently ongoing calls or other services, the UE can directly send the Invite message to the NAS if it receives it.

[0069] An exemplary embodiment of this disclosure also provides a call management method and apparatus, wherein the call notification includes Paging, which sends the call notification to the NAS when the UE is in an idle state.

[0070] Specifically, when the UE's RRC state is idle, the network knows the UE's location at a timing advance (TA) level. Therefore, it needs to send Paging messages to all cells in the TA where the UE is located in order to contact the UE. If the UE receives a Paging message, it will send the Paging message or the call information included therein directly to the NAS.

[0071] An exemplary embodiment of this disclosure also provides a call management method, in which a UE receives different call messages, specifically Call Notifications. A timing diagram illustrating the processing of different Call Notifications received by the UE using this method is shown below. Figure 5 As shown, it includes:

[0072] A Paging Filter (PF) is introduced between the UE's RRC and NAS layers to process all CallNotifications received by the UE. NAS, PF, and RRC constitute the UE Stack.

[0073] In this embodiment, the UE is connected to a 4G or 5G network and may be in an RRC idle state or a connected state. In the RRC connected state, the Call Notification may include: CS Service Notification Invite; in the RRC idle state, the Call Notification may include: Paging.

[0074] Scenario 1: A UE in RRC connection state receives a CS ServiceNotification during a call.

[0075] In this scenario, a call exists on the UE and has started. The UE retains the call information indicated by the CS Service Notification. Since the NAS does not receive any CS Call information, the Inter-System Interoperability (IRAT) procedure is not triggered, and the ongoing call by the UE continues. After the current call concludes, the UE can send a CS Service Notification or the call information indicated therein to the NAS.

[0076] Scenario 2: A UE in RRC connection state receives an Invite during a call.

[0077] In this situation, the UE will immediately receive an Invite notification and prompt the user to decide which call to hold. The currently ongoing call is unaffected while waiting for the user's decision.

[0078] Scenario 3: A UE in RRC connection state that is not making a call receives an Invite or CS Service Notification.

[0079] In this situation, since no call is in progress, the received Invite or CSService Notification will be directly transmitted to the NSA. The UE will then proceed with the call connection process based on the type of call notification received.

[0080] Case 4: A UE in an idle state receives a Paging message.

[0081] When the UE receives the Paging message, it parses it normally and then passes it to the NAS to initiate the RRC process, etc.

[0082] By processing different call notifications under different circumstances separately, the problem of call failure during normal user calls is solved while ensuring process efficiency and eliminating factors that may lead to call failure.

[0083] An exemplary embodiment of this disclosure provides a call management device, the structure of which is as follows: Figure 6 As shown, it includes:

[0084] The paging filter module 601 is used to detect the connection status of the UE after receiving a call notification;

[0085] The call hold module 602 is used to suspend the transmission of the call notification when the UE is in a call state and the call notification indicates that the UE falls back to another network architecture, until the current call ends and a prompt message for the call notification is issued.

[0086] Furthermore, the call notification includes a CS Service Notification, which instructs the UE to fall back to a 2G network and / or a 3G network. The structure of the call holding module 602 is as follows: Figure 7 As shown, it includes:

[0087] The queue management submodule 701 is used to add the call notification to the paging message queue;

[0088] The prompt submodule 702 is used to extract the call notification from the Paging queue and issue corresponding prompt information after the current call ends.

[0089] Furthermore, the structure of the device is as follows: Figure 8 As shown, it also includes:

[0090] The inactive call management module 603 is used to send the call notification to the no-access stratum (NAS) when the UE is in a connected but no-call state. The call notification includes a voice initiation message Invite.

[0091] The idle call management module 604 is used to send the call notification to the NAS when the UE is in an idle state, and the call notification includes Paging.

[0092] The above-described device can be integrated into terminals such as UEs, and the terminal can implement the corresponding functions. Regarding the device in the above embodiments, the specific methods by which each module performs its operations have been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0093] Figure 9 This is a block diagram illustrating a call management device 900 according to an exemplary embodiment. For example, device 900 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0094] Referring to FIG0, the device 000 may include one or more of the following components: a processing component 902, a memory 904, a power component 906, a multimedia component 908, an audio component 910, an input / output (I / O) interface 912, a sensor component 914, and a communication component 916.

[0095] Processing component 902 typically controls the overall operation of device 900, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 902 may include one or more processors 920 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 902 may include one or more modules to facilitate interaction between processing component 902 and other components. For example, processing component 902 may include a multimedia module to facilitate interaction between multimedia component 908 and processing component 902.

[0096] Memory 904 is configured to store various types of data to support the operation of device 900. Examples of this data include instructions for any application or method operating on device 900, contact data, phonebook data, messages, pictures, videos, etc. Memory 904 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0097] The power supply component 906 provides power to the various components of the device 900. The power supply component 906 may include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power to the device 900.

[0098] Multimedia component 908 includes a screen that provides an output interface between the device 900 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 908 includes a front-facing camera and / or a rear-facing camera. When the device 900 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0099] Audio component 910 is configured to output and / or input audio signals. For example, audio component 910 includes a microphone (MIC) configured to receive external audio signals when device 900 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 904 or transmitted via communication component 916. In some embodiments, audio component 910 also includes a speaker for outputting audio signals.

[0100] I / O interface 912 provides an interface between processing component 902 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0101] Sensor assembly 914 includes one or more sensors for providing status assessments of various aspects of device 900. For example, sensor assembly 914 may detect the on / off state of device 900, the relative positioning of components such as the display and keypad of device 900, changes in position of device 900 or a component of device 900, the presence or absence of user contact with device 900, orientation or acceleration / deceleration of device 900, and temperature changes of device 900. Sensor assembly 914 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 914 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0102] Communication component 916 is configured to facilitate wired or wireless communication between device 900 and other devices. Device 900 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 916 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 916 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0103] In an exemplary embodiment, the apparatus 900 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0104] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 904 including instructions, which can be executed by a processor 920 of the device 900 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device, etc.

[0105] A non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by a processor of a mobile terminal, enables the mobile terminal to perform a call management method, the method comprising: detecting the connection status of a UE after receiving a call notification;

[0106] If the UE is in a call and the call notification indicates that the UE should fall back to another network architecture, the transmission of the call notification is suspended until the current call ends and a prompt message for the call notification is issued.

[0107] An exemplary embodiment of this disclosure also provides a computer apparatus, including:

[0108] processor;

[0109] Memory used to store processor-executable instructions;

[0110] The processor is configured as follows:

[0111] Detect the UE's connection status after receiving a call notification;

[0112] If the UE is in a call and the call notification indicates that the UE should fall back to another network architecture, the transmission of the call notification is suspended until the current call ends and a prompt message for the call notification is issued.

[0113] This disclosure provides a call management method and apparatus. Upon receiving a call notification, the method detects the connection status of a UE. If the UE is in a call and the call notification indicates that the UE should fall back to another network architecture, the method suspends the transmission of the call notification until the current call ends, at which point a prompt message for the call notification is issued. This terminates the network architecture fallback process during a call, solves the problem of call failure caused by CS domain calls, ensures call quality under 4G / 5G network architectures, and improves user experience.

[0114] By retaining the call notification, the UE cannot continue to communicate with the network regarding the CS Service Notification, thus blocking the IRAT process and not adversely affecting ongoing calls.

[0115] By adding a Paging Filter module to preprocess received Call Notification messages, compatibility with existing processing workflows is maintained. This software-based solution eliminates the need for additional hardware support, resulting in lower costs and better compatibility.

[0116] Those skilled in the art will also understand that the various illustrative logical blocks and steps listed in the embodiments of this application can be implemented by electronic hardware, computer software, or a combination of both. Whether such functionality is implemented through hardware or software depends on the specific application and the overall system design requirements. Those skilled in the art can implement the described functionality using various methods for each specific application, but such implementation should not be construed as exceeding the scope of protection of the embodiments of this application.

[0117] It should be understood that, unless otherwise specifically indicated, features of various embodiments of this disclosure described herein can be combined with each other. As used herein, the term “and / or” includes any one of the relevant listed items and any combination of any two or more; similarly, “at least one of…” includes any one of the relevant listed items and any combination of any two or more.

[0118] Furthermore, the term “exemplary” is used herein to mean serving as an example, instance, or illustration. Any aspect or design described herein as “exemplary” is not necessarily to be construed as advantageous compared to other aspects or designs. Rather, the use of the term “exemplary” is intended to present the concept in a concrete manner. As used herein, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or.” That is, unless otherwise specified or clear from the context, “X applies A or B” is intended to mean any of the natural inclusive arrangements. That is, “X applies A or B” satisfies any of the foregoing instances if X applies A; X applies B; or both X applies A and B. Additionally, unless otherwise specified or clear from the context to refer to the singular form, the articles “a” and “an” as used in this application and the appended claims are generally understood to mean “one or more.”

[0119] Similarly, although this disclosure has been shown and described with respect to one or more implementations, equivalent variations and modifications will occur to those skilled in the art upon reading and understanding the specification and drawings. This disclosure includes all such modifications and variations and is limited only by the scope of the claims. In particular, with respect to the various functions performed by the components described above (e.g., elements, resources, etc.), unless otherwise indicated, the terminology used to describe such components is intended to correspond to any component (functionally equivalent) that performs the specific function of the described component, even if structurally not equivalent to the disclosed structure. Furthermore, although specific features of this disclosure may have been disclosed with respect to only one of several implementations, such features may be combined with one or more other features of other implementations, as may be desired and advantageous to any given or particular application. Moreover, with regard to the terms “comprising,” “owning,” “having,” “having,” or variations thereof as used in the detailed description or claims, such terms are intended to be inclusive in a manner similar to the term “including.”

[0120] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0121] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A call management method characterized by, The method comprises: detecting a connection state of a user equipment (UE) after receiving a call notification; suspending transmission of the call notification until a prompt for the call notification is sent after a current call ends, in a case that the UE is in a call state and the call notification indicates that the UE falls back to other network architecture.

2. The call management method of claim 1, wherein, The call notification comprises a circuit switched service notification (CS Service Notification), and the call notification indicates that the UE falls back to a second generation (2G) network and / or a third generation (3G) network.

3. The call management method of claim 1, wherein, The step of suspending transmission of the call notification until a prompt for the call notification is sent after a current call ends, in a case that the UE is in a call state and the call notification indicates that the UE falls back to other network architecture, comprises: adding the call notification to a paging queue (Paging); extracting the call notification in the paging queue and sending a corresponding prompt after the current call ends.

4. The call management method of claim 1, wherein, The call notification comprises an invite, and after the step of detecting the connection state of the UE after receiving the call notification, the method further comprises: sending the call notification to a non-access stratum (NAS) in a case that the UE is in a connected and no-call state.

5. The call management method of claim 1, wherein, The call notification comprises a paging, and after the step of detecting the connection state of the UE after receiving the call notification, the method further comprises: sending the call notification to the NAS in a case that the UE is in an idle state.

6. A call management apparatus characterized by comprising: The apparatus comprises: a paging filter module configured to detect a connection state of a user equipment (UE) after receiving a call notification; a call holding module configured to suspend transmission of the call notification until a prompt for the call notification is sent after a current call ends, in a case that the UE is in a call state and the call notification indicates that the UE falls back to other network architecture.

7. The call management apparatus according to claim 6, characterized by The call notification comprises a circuit switched service notification (CS Service Notification), and the call notification indicates that the UE falls back to a second generation (2G) network and / or a third generation (3G) network, and the call holding module comprises: a queue management sub-module configured to add the call notification to a paging queue (Paging); a prompt sub-module configured to extract the call notification in the paging queue and send a corresponding prompt after the current call ends.

8. The call management device according to claim 6, characterized in that The apparatus further comprises: a non-activated call management module configured to send the call notification to a non-access stratum (NAS) in a case that the UE is in a connected and no-call state, the call notification comprising an invite; an idle call management module configured to send the call notification to the NAS in a case that the UE is in an idle state, the call notification comprising a paging.

9. A computer apparatus, comprising: The apparatus comprises: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: detect a connection state of a user equipment (UE) after receiving a call notification; In case the UE is in a call state and the call notification indicates that the UE falls back to other network architecture, transmission of the call notification is suspended until a prompt for the call notification is issued after the current call ends.

10. A non-transitory computer readable storage medium, when instructions in the storage medium are executed by a processor of a mobile terminal, enable the mobile terminal to perform a call management method, the method comprising: detecting a connection state of a user terminal (UE) upon receiving a call notification; In case the UE is in a call state and the call notification indicates that the UE falls back to other network architecture, transmission of the call notification is suspended until a prompt for the call notification is issued after the current call ends.

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