WO2023109679A1

WO2023109679A1 - Voice fallback method and apparatus, and terminal and readable storage medium

Info

Publication number: WO2023109679A1
Application number: PCT/CN2022/137970
Authority: WO
Inventors: 王洋洋; 杨晓东
Original assignee: 维沃移动通信有限公司
Priority date: 2021-12-15
Filing date: 2022-12-09
Publication date: 2023-06-22
Also published as: CN116266935A

Abstract

The present application belongs to the technical field of communications. Disclosed are a voice fallback method and apparatus, and a terminal and a readable storage medium. The voice fallback method in the embodiments of the present application comprises: a terminal determining a target solution according to target information; and the terminal executing voice fallback according to the target solution, wherein the target solution is used for reducing a delay in voice fallback. The target information comprises at least one of the following: first capability information of the terminal; second capability information of a first network-side device, wherein the first network-side device is a network-side device corresponding to a serving cell of the terminal; first indication information from a second network-side device, wherein the first indication information is used for indicating or configuring the target solution; and priority information of M solutions, wherein the M solutions comprise the target solution, and M is an integer greater than 1.

Description

Voice fallback method, device, terminal and readable storage medium

Cross References to Related Applications

This application claims priority to Chinese Patent Application No. 202111539885.9 filed in China on December 15, 2021, the entire contents of which are hereby incorporated by reference.

technical field

The present application belongs to the technical field of communication, and in particular relates to a voice fallback method, device, terminal and readable storage medium.

Background technique

In New Radio (NR), when a terminal initiates or receives an Internet Protocol Multimedia Subsystem (IP Multimedia Subsystem, IMS) voice call, it establishes an IMS voice (voice) Quality of Service flow (QoS flow) ), the next-generation base station node (Generation Node Base, gNB) triggers the voice fallback (Fallback) process after receiving the QoS flow, such as: Evolved Packet System (Evolved Packet System, EPS) Fallback or wireless access technology (Radio Access Technology, RAT) Fallback process.

In the related technology, the base station needs to wait for the terminal to perform inter-RAT (inter-RAT, IRAT) measurement to obtain the measurement result. In this way, the delay of the voice fallback will be affected if the configuration of the measurement delivered by the base station is too late or the measurement time of the terminal is long.

Due to various reasons such as insufficient time for the terminal to measure inter-RAT or no inter-RAT measurement is configured, there is no measurement result before performing redirection or handover, and then when performing handover-based EPS/RAT Fallback, it will cause Handover fails, resulting in a long EPS/RAT Fallback delay. Or, when performing redirection-based EPS/RAT Fallback, due to the protocol agreement, the frequency point of Long Term Evolution (LTE) issued by the gNB during redirection (such as: Evolved Universal Mobile Network System Terrestrial Radio Access ( Evolved Universal Terrestrial Radio Access, EUTRA) frequency point (Frequency)), therefore, the LTE cell indicated by the terminal's serving cell (NR) through redirection signaling is not necessarily the Reference Signal Received Power (RSRP) At the same time, blind redirection also has the problem of excessive EPS/RAT Fallback delay due to improper cell selection.

It can be seen that there is a problem in the related art that the voice call performance is reduced due to an excessively long EPS/RAT Fallback delay.

Contents of the invention

Embodiments of the present application provide a voice fallback method, device, terminal, and readable storage medium, which can solve the problem of poor voice communication performance caused by excessive EPS/RAT Fallback delay in the related art.

In the first aspect, a voice fallback method is provided, which includes:

The terminal determines the target scheme according to the target information;

The terminal performs voice fallback according to the target solution;

Wherein, the target solution is used to reduce the delay of the voice fallback, and the target information includes at least one of the following:

first capability information of the terminal;

Second capability information of the first network-side device, where the first network-side device is the network-side device corresponding to the serving cell of the terminal;

First instruction information from the second network side device, where the first instruction information is used to indicate or configure the target solution;

Priority information of M solutions, where the M solutions include the target solution, and M is an integer greater than 1.

In a second aspect, a device for voice fallback is provided, which is applied to a terminal, and the device includes:

A determining module, configured to determine the target solution according to the target information;

An execution module, configured to perform voice fallback according to the target solution;

first capability information of the terminal;

In a third aspect, a terminal is provided, the terminal includes a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, the following The steps of the method in one aspect.

In a fourth aspect, a terminal is provided, including a processor and a communication interface, wherein the processor is used to determine a target solution according to target information, and the communication interface is used to perform voice fallback according to the target solution;

first capability information of the terminal;

According to a fifth aspect, a readable storage medium is provided, and a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the method according to the first aspect are implemented.

A sixth aspect provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, the processor is used to run programs or instructions, and implement the method as described in the first aspect .

In a seventh aspect, a computer program/program product is provided, the computer program/program product is stored in a storage medium, and the computer program/program product is executed by at least one processor to implement the method described in the first aspect The steps of the voice fallback method.

In this embodiment of the present application, the terminal determines the target scheme according to the target information; the terminal performs voice fallback according to the target scheme; wherein, the target scheme is used to reduce the delay of the voice fallback, and the target information includes the following At least one item: first capability information of the terminal; second capability information of the first network-side device, the first network-side device being the network-side device corresponding to the serving cell of the terminal; information from the second network-side device The first indication information, the first indication information is used to indicate or configure the target scheme; and, the priority information of M schemes, the M schemes include the target scheme, and M is an integer greater than 1 . In this way, when receiving or initiating a voice call, the terminal can determine the target solution according to the target information, and perform voice fallback according to the target solution, so that the target solution can be used to reduce the delay of the voice fallback, and then by reducing the time delay of the voice fallback Delay to improve voice call performance. In addition, when the terminal has at least two optional schemes that can reduce the voice fallback delay, the terminal can select a target scheme from the at least two schemes based on the target information, so as to avoid that the terminal does not know which scheme to adopt To reduce the delay of voice fallback, it can improve the reliability of the terminal in reducing the delay of voice fallback.

Description of drawings

FIG. 1 is a schematic structural diagram of a wireless communication system to which an embodiment of the present application can be applied;

Figure 2 is a schematic diagram of the EPS fallback mechanism;

Fig. 3 is a schematic diagram of the measurement results satisfying the B1 event;

FIG. 4 is a schematic diagram of a RAT fallback mechanism;

FIG. 5 is a flow chart of a voice fallback method provided in an embodiment of the present application;

FIG. 6 is a schematic structural diagram of a voice fallback device provided in an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a communication device provided by an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a terminal provided by an embodiment of the present application.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, but not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in this application belong to the protection scope of this application.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific sequence or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and "second" distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the related objects before and after are an "or" relationship.

It is worth noting that the technology described in the embodiment of this application is not limited to the Long Term Evolution (Long Term Evolution, LTE)/LTE-Advanced (LTE-Advanced, LTE-A) system, and can also be used in other wireless communication systems, such as code Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access, OFDMA), Single-carrier Frequency Division Multiple Access (Single-carrier Frequency Division Multiple Access, SC-FDMA) and other systems. The terms "system" and "network" in the embodiments of the present application are often used interchangeably, and the described technology can be used for the above-mentioned system and radio technology, and can also be used for other systems and radio technologies. The following description describes the New Radio (New Radio, NR) system for example purposes, and uses NR terminology in most of the following descriptions, but these techniques can also be applied to applications other than NR system applications, such as the 6th generation (6th Generation , 6G) communication system.

Fig. 1 shows a block diagram of a wireless communication system to which the embodiment of the present application is applicable. The wireless communication system includes a terminal 11 and a network side device 12 . Wherein, the terminal 11 can be a mobile phone, a tablet computer (Tablet Personal Computer), a laptop computer (Laptop Computer) or a notebook computer, a personal digital assistant (Personal Digital Assistant, PDA), a palmtop computer, a netbook, a super mobile personal computer (ultra-mobile personal computer, UMPC), mobile Internet device (Mobile Internet Device, MID), augmented reality (augmented reality, AR) / virtual reality (virtual reality, VR) equipment, robot, wearable device (Wearable Device) , Vehicle User Equipment (VUE), Pedestrian User Equipment (PUE), smart home (home equipment with wireless communication functions, such as refrigerators, TVs, washing machines or furniture, etc.), game consoles, personal computers (personal computer, PC), teller machine or self-service machine and other terminal side devices, wearable devices include: smart watches, smart bracelets, smart headphones, smart glasses, smart jewelry (smart bracelets, smart bracelets, smart rings, smart necklaces, smart feet bracelets, smart anklets, etc.), smart wristbands, smart clothing, etc. It should be noted that, the embodiment of the present application does not limit the specific type of the terminal 11 . The network side device 12 may include an access network device or a core network device, wherein the access network device 12 may also be called a radio access network device, a radio access network (Radio Access Network, RAN), a radio access network function, or Wireless access network unit. The access network device 12 may include a base station, a wireless local area network (Wireless Local Area Networks, WLAN) access point or a wireless fidelity node (Wireless Fidelity, WiFi) node, etc., and the base station may be called a node B or an evolved node B (eNB) , access point, base transceiver station (Base Transceiver Station, BTS), radio base station, radio transceiver, basic service set (Basic Service Set, BSS), extended service set (Extended Service Set, ESS), home B node, Home evolved Node B, Transmitting Receiving Point (TRP) or some other suitable term in the field, as long as the same technical effect is achieved, the base station is not limited to specific technical terms. It should be noted that, in In the embodiment of the present application, only the base station in the NR system is used as an example for introduction, and the specific type of the base station is not limited. Core network equipment may include but not limited to at least one of the following: core network nodes, core network functions, mobility management entities (Mobility Management Entity, MME), access mobility management functions (Access and Mobility Management Function, AMF), session management functions (Session Management Function, SMF), User Plane Function (UPF), Policy Control Function (Policy Control Function, PCF), Policy and Charging Rules Function (PCRF), edge application service Discovery function (Edge Application Server Discovery Function, EASDF), unified data management (Unified Data Management, UDM), unified data storage (Unified Data Repository, UDR), home subscriber server (Home Subscriber Server, HSS), centralized network configuration ( Centralized network configuration, CNC), network storage function (Network Repository Function, NRF), network exposure function (Network Exposure Function, NEF), local NEF (Local NEF, or L-NEF), binding support function (Binding Support Function, BSF), application function (Application Function, AF), etc. It should be noted that, in the embodiment of the present application, only the core network equipment in the NR system is used as an example for introduction, and the specific type of the core network equipment is not limited.

An important way for the fifth generation mobile communication technology (5th Generation Mobile Communication Technology, 5G) network to implement voice is EPS Fallback, the main idea of which is to switch/redirect to the fourth generation mobile communication technology (4th Generation Mobile Communication Technology, 4G), using 4G long-term evolution voice bearer (Voiceover Long-Term Evolution, VoLTE) to complete the call, and then quickly return to (fast return) 5G after the IMS call ends.

As shown in Figure 2, under the EPS Fallback mechanism, EPS Fallback can be performed in the following ways:

Method 1: EPS Fallback based on switching

When a terminal with EPS Fallback capability initiates an IMS voice service requirement, the NR sends the B1 event measurement of LTE. After the terminal meets the B1 (Event B1) threshold, it reports to the NR the measurement result between B1 and NR. The measurement result initiates a handover command to the LTE network, and the terminal performs voice services (Voice) after switching to the LTE network.

The switching-based EPS Fallback process mainly includes the following steps:

1. The gNB configures B1 event measurement for the user equipment (User Equipment, UE), and informs the carrier frequency (or frequency point) of the EUTRA to be measured and the B1 threshold;

2. The UE reports the measured B1 level of the LTE cell to the gNB, including: the physical cell identifier (Physical Cell Identifier, PCI) and the measurement identifier (measid) of the measured cell;

3. The gNB sends a handover command to the UE, carrying the PCI of the target cell;

4. Establish the dedicated bearer of the voice service with Qos class indication (QoS Class Identifier, QCI)=1;

After the 5.4G voice is over, go to the 5G cell through FastReturn (that is, blindly redirect to the 5G cell).

Wherein, the B1 event indicates that the neighboring cells of different RATs become better than the threshold (ie, the B1 threshold) (Inter RAT neighbor becomes better than threshold).

Measurement event B1 can be used for inter-RAT handover procedures that do not depend on the coverage of the serving cell. For example, in the load balancing feature, it is decided to move UE away from NR due to load conditions rather than radio conditions. In this case, the UE only needs to verify that the target cell in other RAT (eg LTE) is better than a certain signal level threshold and can provide sufficient coverage before handing over to this target cell.

As shown in FIG. 3 , the triggering condition of the B1 event is: Mn+Ofn+Ocn−Hys>Thresh; the canceling condition is: Mn+Ofn+Ocn+Hys<Thresh.

Wherein, Mn represents: the measurement result of the inter-RAT neighbor cell, which does not consider any bias;

Ofn indicates: the specific offset of the measurement object corresponding to the frequency corresponding to the inter-RAT neighboring cell;

Ocn means: the cell-specific offset of the inter-RAT neighboring cell, if the neighboring cell is not configured with relevant parameters, it is set to 0;

Hys means: the hysteresis parameter of the event;

Thresh means: the threshold parameter of the event;

In implementation, the measurement method of Mn can be determined to be expressed in dBm or dB according to the measurement amount of the inter-RAT neighboring cell; Ofn, Ocn and Hys are expressed in dB; the measurement method of Thresh is the same as that of Mn.

Method 2: EPS Fallback based on measurement redirection

The EPS fallback based on measurement redirection is basically similar to the EPS fallback based on handover in terms of process, but there are differences in the fallback method; the EPS fallback based on redirection is based on the radio resource control (Radio Resource Control) after the B1 event measurement of NR. , RRC) to release (Release) the target frequency carried in the message to fall back and forth to the LTE network.

The process of EPS Fallback based on measurement redirection mainly includes the following steps:

1. The gNB configures B1 event measurement for the UE;

2. The UE reports the measurement result of the B1 event, which includes the PCI of the target cell, the measured cell level, and the measured measid;

3. After obtaining the measurement results that meet the B1 threshold, the gNB redirects to the LTE network through the RRC Release message, which must contain the target frequency point.

Method 3: EPS Fallback based on blind redirection

The biggest difference between EPS Fallback based on blind redirection and EPS Fallback based on measurement redirection is that the network directly redirects the UE to the LTE network, and the UE does not necessarily have the measurement result of the target frequency point.

Another way for 5G networks to implement voice is RAT Fallback.

As shown in Figure 4, the process of RAT Fallback mainly includes the following steps:

1. The next generation radio access network (NG-RAN) where the UE resides in the 5G system starts the voice session establishment process initiated by the mobile terminal (Mobile Orginated, MO) or terminated by the mobile terminal (Mobile Terminated, MT);

2. The network starts to perform Protocol Data Unit (PDU) session modification to establish a QoS flow to the source NG-RAN for IMS voice;

3. If the source NG-RAN supports RAT fallback for IMS voice, the source NG-RAN triggers RAT fallback according to UE capabilities, network configuration and wireless conditions; among them, the source NG-RAN may request the UE to report the measurement results of the target NG-RAN ;

4. The source NG-RAN rejects the PDU session modification in step 2, indicating that the fallback of IMS voice is in progress;

5. The source NG-RAN starts switching or redirecting to the Evolved Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio Access Network, E-UTRAN) connected to the 5G core network;

6. After the handover or redirection is completed, the network re-executes the PDU session modification to establish the QoS flow for IMS voice.

It can be seen from the above EPS/RAT Fallback process that gNB triggers EPS Fallback or RAT Fallback after receiving the QoS flow for establishing IMS voice. At this time, the terminal may need the inter-RAT measurement results. Due to various reasons such as insufficient time for the terminal to measure inter-RAT or no inter-RAT measurement is configured, the measurement results of the B1 event are not satisfied before the handover/redirection is performed, so when performing handover-based EPS/RAT Fallback Resulting in handover failure, resulting in too long EPS/RAT Fallback delay; or in the case of redirection-based EPS/RAT Fallback, because the protocol stipulates that the frequency point E-UTRA Frequency of LTE must be carried during redirection, so the serving cell (NR) The LTE cell indicated by redirection signaling is not necessarily the cell with the highest RSRP, and blind redirection may cause excessive EPS/RAT Fallback delay due to inappropriate cell selection. In this way, due to the excessively long EPS/RAT Fallback delay, the voice call experience will be reduced, so it is necessary to propose relevant design solutions to reduce the EPS/RAT Fallback delay as much as possible.

In implementation, there may be several schemes that can be used to reduce the EPS/RAT Fallback delay. When at least two schemes exist at the same time, the terminal cannot determine which scheme to use to reduce the EPS/RAT Fallback delay. However, in the embodiment of the present application, the terminal can determine which scheme to use to reduce the EPS/RAT Fallback delay according to the target information.

The voice fallback method, device, terminal and readable storage medium provided by the embodiments of the present application will be described in detail below through some embodiments and application scenarios with reference to the accompanying drawings.

Please refer to FIG. 5, a method for voice fallback provided by the embodiment of the present application, the execution body may be a terminal, as shown in FIG. 5, the method for voice fallback may include the following steps:

Step 501, the terminal determines the target scheme according to the target information, wherein the target information includes at least one of the following:

first capability information of the terminal;

In an implementation, the second network-side device and the first network-side device may be the same network-side device, in other words, the first indication information may be indication information from the first network-side device, or The above-mentioned second network-side device and the first network-side device may be different network-side devices, for example: when the serving cell of the terminal changes during the moving process, the first network-side device The indication information may also come from a network side device corresponding to the serving cell of the terminal before moving, which is not specifically limited here.

The above M schemes can be understood as: there are M schemes that can be used to reduce the delay of voice fallback, and the terminal can adopt any one of the M schemes to reduce the delay of voice fallback.

In this step, the terminal determines the target solution according to the target information, so that the terminal can select a suitable target solution from at least two solutions that can be used to reduce the voice fallback delay according to the target information, so as to reduce the voice fallback time according to the target solution delay. For example: selecting the target solution supported by the terminal, and/or selecting the target solution supported by the serving cell, and/or selecting the target solution indicated by the network side device, and/or selecting the target solution with the highest priority, etc.

Wherein, the voice fallback can be EPS Fallback or RAT Fallback, or other voice fallback methods that may occur in the future, which are not specifically limited here.

Step 502, the terminal performs voice fallback according to the target scheme, wherein the target scheme is used to reduce the time delay of the voice fallback.

The terminal performing voice fallback according to the target scheme may include: performing a measurement scheme related to the voice fallback according to the target scheme, such as: when to measure the measurement results corresponding to inter-RAT neighboring cells, and/or , measure what kind of measurement, etc., and determine the target cell for voice fallback according to the measurement results, that is, fall back to the target cell, so as to perform a voice call in the target cell.

In some embodiments, the target regimen includes any of the following:

The first solution is to instruct the terminal to perform the first measurement related to the voice fallback in the radio resource control RRC idle state/deactivated state;

The second solution is to instruct the terminal to receive a paging message carrying the first information or a high-level signaling carrying the first information in the RRC idle state/deactivation state, and the terminal is in the RRC idle state / Perform cell selection or reselection to an Evolved Universal Mobile Network System Terrestrial Radio Access E-UTRAN cell in a deactivated state, and the first information is related to the voice fallback;

The third solution is to instruct the terminal to receive the paging message carrying the first information or the high-layer signaling carrying the first information when it is in the RRC idle state/deactivated state, then the terminal will The sent RRC connection establishment request or RRC connection recovery request carries second indication information, the second indication information is used to instruct the terminal to establish or restore the RRC connection based on the first information, and the terminal is establishing or restoring receiving measurement configuration information of the first network side device after the RRC connection, where the measurement configuration information is used to configure the measurement related to the voice fallback;

The fourth solution is to instruct the terminal to ignore the frequency point information indicated by the first network side device if the measurement result of the adjacent cell is not obtained when performing the voice fallback based on redirection, and the adjacent cell is E-UTRAN cell.

case one

For the first solution above, it performs the first measurement related to the voice fallback in the RRC idle state (idel)/inactive state (inactive), wherein the first measurement can be referred to as the RRC idle state/inactive In the measurement in the deactivated state, the terminal reports the measurement result of the first measurement after entering the connection state, and the network side device determines the target cell for the voice fallback according to the measurement result of the first measurement.

In this way, the terminal does not need to wait to enter the RRC connected state before performing other connected state measurements related to the voice fallback, thereby reducing the time for the terminal to enter the RRC connected state from the RRC idle state/deactivated state during the voice fallback process. delay.

Optionally, the first solution may specifically include the following sub-solutions:

The first sub-solution, instructing the terminal to perform a first measurement related to the voice fallback in the RRC idle state/deactivated state; or,

The second sub-solution indicates that when the terminal receives the paging message carrying the first information or the high-layer signaling carrying the first information in the RRC idle state/deactivated state, it starts to perform the voice fallback related the first measurement of ; or,

The third sub-solution is to instruct the terminal to start to perform the voice fallback-related operation when receiving the paging message carrying the first information or the high-level signaling carrying the first information in the RRC idle state/deactivated state. , and if the terminal has not completed the first measurement in the RRC idle state/deactivation state, the terminal advances within the first time period according to the received first network-side device The prepared measurement configuration information continues to perform the first measurement after the RRC connection is established or restored, the measurement configuration information is used to configure the measurement related to the voice fallback, and the terminal is in the first time period The RRC idle state/deactivation state is described above.

For the first sub-solution above, the terminal may directly perform the first measurement without receiving the paging message carrying the first information or the high layer signaling carrying the first information.

The difference between the above-mentioned second sub-solution and the first sub-solution is that: the second sub-solution needs to receive the paging message carrying the first information or the high-layer signaling carrying the first information, The first measurement is only triggered based on the acquired first information.

In some implementations, the first information may be understood as: information sent by the network side device to instruct the terminal to perform voice fallback, for example: the first information may include at least one of the following:

Indication information of a voice call, where the voice call includes an Internet Protocol Multimedia Subsystem IMS voice call;

The indication information of the voice fallback (for example: EPS fallback, RAT fallback or fallback indication information).

In this way, the terminal may determine that voice fallback needs to be performed based on the first information, thereby triggering the terminal to perform the first measurement.

Of course, the first information can also be understood as: instruction information sent by the network side device for instructing the terminal to perform the first measurement, or configuration information related to the first measurement configured by the network side device, etc. , so that the terminal performs the first measurement based on the first information, which is not specifically limited here.

In some implementation manners, the first information may be carried in a paging message. In this way, a network side device may actively send a paging message carrying the first information to trigger the terminal to perform the first measurement.

In some other implementation manners, the first information may be carried in high-layer signaling of the terminal, so that a high layer of the terminal may actively trigger the terminal to perform the first measurement.

The difference between the third sub-scheme and the second sub-scheme is that: when the terminal has not completed the first measurement in the RRC idle state/deactivated state, the terminal will establish or restore the RRC connection After that, continue to perform the first measurement, so as to prevent the terminal from completing the first measurement in the RRC idle state/deactivation state, the terminal needs to restart after establishing or restoring the RRC connection Measurement, the problem caused by wasting the time and measurement resources consumed in the partial measurement process performed by the terminal in the RRC idle state/deactivated state, so that the time for performing the first measurement process can be reduced, and the reduction can be achieved. The effect of the total duration of voice fallback.

In addition, in the third subsolution above, the first network side device prepares the measurement configuration information in advance when the terminal is in the RRC idle state/deactivated state.

In an implementation, the first network side device may carry the first information based on the sent paging message (paging), or detect that the paging cause is that the terminal performs a voice call or needs to perform a voice fallback (For example: in the process of establishing an RRC connection with the first network side device, the terminal indicates the voice call service in the establishment cause), when the terminal is in the RRC idle state/deactivated state , the measurement configuration information is prepared in advance.

In this way, after the terminal establishes or restores the RRC connection, the first network side device can directly send the measurement configuration information to the terminal, so that the first network side does not need to establish or restore the RRC connection at the terminal. The measurement configuration information is prepared only after the connection, so that the time delay for configuring the measurement configuration information to the terminal can be reduced, thereby reducing the time delay for the terminal to perform the first measurement.

case two

For the second solution above, the terminal may perform cell selection or reselection to an E-UTRAN cell in advance in the idle state/deactivated state.

In some embodiments, during the process of cell selection or reselection to an E-UTRAN cell in advance, the terminal may measure the frequency indicated by the network side device in the idle state/deactivation state to obtain the measurement result, And according to the measurement result, choose to access to the target cell or reselect to the target cell.

For example: reselect to the target cell according to the measurement result and at least one of the following reselection rules:

The E-UTRAN cell selection reception level value is higher than the cell reception level reselection threshold;

The E-UTRAN cell selection reception quality value is higher than the reception quality reselection threshold of the cell;

The high-priority E-UTRAN cell selection reception level value is higher than the reception level reselection threshold of the high-priority cell;

The high-priority E-UTRAN cell selection reception quality value is higher than the reception quality reselection threshold of the high-priority cell;

The serving cell selection reception level value is lower than the reception level reselection threshold of the serving cell, and the low priority E-UTRAN cell selection reception level value is higher than the reception level reselection threshold of the low priority cell;

The reception quality value of serving cell selection is lower than the reception level reselection threshold of the serving cell, and the reception quality value of low priority E-UTRAN cell selection is higher than the reception quality reselection threshold of low priority cells.

Through the above-mentioned second solution, when a terminal in an idle state or an inactive state receives a first paging or a request for a first service or a high-layer signaling carrying the first information, it immediately performs a cell selection or reselection operation. In this way, it is possible to avoid the time delay caused by first establishing or restoring the RRC connection when the terminal performs the voice service in the idle state or the inactive state. Therefore, the embodiment of the present application can reduce the voice fallback delay.

Case three

For the third solution above, in some implementations, when the terminal is in the RRC idle state/deactivated state, it receives a paging message carrying the first information or a high-layer signaling carrying the first information , the terminal carries the second indication information in the RRC connection establishment request or RRC connection recovery request sent by the terminal, so that the terminal in the RRC idle state/deactivation state can The second indication information is carried in the establishment request or the RRC connection restoration request to inform the first network side device that the reason why the terminal establishes or restores the RRC connection is that the terminal needs to perform a voice fallback or perform a voice call. In this way, the first network side device can start preparing the measurement configuration information based on the second indication information, so that the measurement configuration information can be sent to the terminal as early as possible after the terminal establishes or restores the RRC connection. Configuration information to reduce configuration delay.

Of course, the first network-side device may also learn in other ways that the reason why the terminal in the RRC idle state/deactivated state establishes or restores the RRC connection is that the terminal needs to perform voice fallback or perform a voice call, which is not specifically limited here. .

Situation four

For the above scheme 4, when the terminal performs the voice fallback based on redirection (such as EPS fallback based on redirection), if the measurement result of the neighboring cell is not obtained, the terminal will not even know the first network The frequency point information indicated by the first network side device may not be able to find a suitable E-UTRAN cell. At this time, the terminal ignores the frequency point information indicated by the first network side device, which can reduce the need for the terminal to The resource waste caused by measuring the frequency point information indicated by the first network side device is shortened, and the measurement delay is shortened.

Wherein, the failure to obtain the measurement result of the neighboring cell may be understood as: the failure to obtain the measurement result satisfying the triggering condition of the B1 event.

In the implementation, the terminal will report to the first network side device only when it obtains the measurement result satisfying the trigger condition of the B1 event. Correspondingly, the terminal does not obtain the trigger condition satisfying the B1 event When the measurement results are measured, the first network-side device does not know which frequency-point neighboring cells are suitable for the terminal, so that the LTE cell indicated by the first network-side device through redirection signaling (that is, the same as the LTE cell The LTE cell corresponding to the frequency point information) is not the cell with the highest Reference Signal Received Power (RSRP), and blind redirection may cause excessive EPS/RAT Fallback delay due to inappropriate cell selection.

Through the above solution 4, when the terminal performs the voice fallback based on redirection, if the terminal does not obtain the measurement result satisfying the trigger condition of the B1 event, it can ignore the instruction indicated by the first network side device. LTE cells to reduce the EPS/RAT Fallback delay caused by blind redirection that may be caused by inappropriate cell selection.

It should be noted that, in practical applications, whether the terminal ignores the frequency point information indicated by the first network-side device when the terminal does not obtain a measurement result that satisfies the trigger condition of the B1 event can be determined by the network-side device Configuration, for example: the terminal receives target indication information from the network side device, the target indication information is used to instruct the terminal to ignore the first The frequency point information indicated by the network side device, so that, when the terminal receives the target indication information, perform the step of ignoring the first step when the measurement result that meets the trigger condition of the B1 event is not obtained. A step of frequency point information indicated by the network side device; correspondingly, if the terminal does not receive the target indication information, it may, based on the The frequency point information indicated by the first network-side device is used for measurement, which is not specifically limited here.

As an optional implementation manner, when the target information includes the first capability information, the terminal determines a target solution according to the target information, including:

The terminal determines the target solution supported by the terminal according to the first capability information.

In this embodiment, the terminal selects a supported target solution according to its own capability information, so as to avoid the problem that the terminal performs voice fallback according to a solution not supported by the terminal, which causes voice fallback failure.

As an optional implementation manner, when the target information includes the second capability information, the terminal determines a target solution according to the target information, including:

The terminal determines the target solution supported by the first network side device according to the second capability information.

In this embodiment, the terminal selects a target solution supported by the network according to the capability information of the first network-side device, so as to avoid voice fallback failure caused by the terminal performing voice fallback according to a solution not supported by the first network-side device The problem.

As an optional implementation manner, the second capability information includes second information from the first network-side device, where the second information is used to indicate the target solution supported by the first network-side device .

In this embodiment, the first network-side device determines which one or several schemes it supports to reduce voice fallback delay according to its own capability information, and informs the terminal of the supported scheme through the second information, In this way, the terminal receives the second information from the first network-side device, and then can determine which one or which types are supported by the first network-side device according to the second information for reducing voice fallback delay. solution, without acquiring the second capability information of the first network side device, and then performing capability judgment based on the second capability information, which can reduce the transmission resources and computing resources of the terminal.

In some implementation manners, the second information may explicitly indicate the target solution supported by the first network side device, for example: the second information is used to indicate that the first network device supports the reduction of EPS/RAT Fallback The first measurement of delay (that is, the measurement of RRC idle/inactive).

In some other implementation manners, the second information may include identification information corresponding to the target solution. For example, if it is assumed that the first network device only supports solution A and solution B, at this time, the 2-bit second information may be used. Two pieces of information are used to indicate the identification of the scheme supported by the first network device, that is, "10" means that only scheme A is supported, "01" means that only scheme B is supported; "11" means that scheme A and scheme B are supported.

Of course, in other implementation manners, the second information may also imply the scheme supported by the first network side device, for example: the second information includes indication information of the target scheme, or the second information It includes configuration information related to configuring the terminal to execute the target solution.

For example: the second information is configuration information of RRC idle/inactive measurement, and the configuration information is used to configure related information of measurement for reducing EPS/RAT Fallback delay.

In this way, when the terminal receives the second information, it means that the first network side device supports the solution indicated by the second information; correspondingly, when the terminal does not receive the second information , which means that the first network-side device does not support the solution indicated by the second information.

Of course, in practical applications, the terminal and the first network-side device can also determine the solution supported by the first network-side device in other ways, such as: by pre-defining the protocol, or by default, the default Which schemes are supported by the first network side device, and will not be described in detail here.

It should be noted that, when the second information is used to indicate that the first network side device supports the target solution, or is used to configure the target solution, the function of the above second information may be the same as that of the first network side device. The function of the indication information is the same. In implementation, the terminal may only obtain any one of the second information and the first indication information, so as to determine the target solution accordingly; of course, the terminal may also The second information and the first indication information may be obtained, for example: the second information is used to indicate that the first network side device supports two schemes, and the first indication information is used to indicate that the two schemes In this way, the terminal may determine, according to the second information and the first indication information, that the target scheme is a scheme supported by the first network side device and indicated in the first indication information.

As an optional implementation manner, the priority information of the M solutions is predefined by the protocol, or the priority information of the M solutions is carried in the configuration information of the target solution, or, the M The priority information of each scheme is carried in the indication message received by the terminal from the third network side device.

In an implementation, if the target information includes priority information of the M solutions, the terminal preferentially selects a solution with a higher priority as the target solution.

In the first optional implementation manner, the priority information of the M schemes is carried in the configuration information of the target scheme, which can be understood as: when the network side device sends the configuration information related to each scheme, in the The configuration information contains priority indication information, which realizes the multiplexing of configuration messages to transmit the priority information. Compared with the network side equipment sending additional indication messages to indicate the priority information of M schemes, it can Reduce the signaling overhead of the terminal.

In a second optional implementation manner, similar to the manner in which the priority information of the above M solutions is carried in the configuration information of the target solution, the terminal obtains the priority information of the M solutions in a manner predefined by the protocol. In this way, the signaling overhead of the terminal can also be reduced.

In a third optional implementation manner, the priority information of the M schemes is carried in the indication message received by the terminal from the third network side device, and the M can be flexibly indicated or changed through the indication message. The priority information of the scheme, wherein, the third network-side device may be any network-side device, for example: the network-side device corresponding to the serving cell before moving or the first network-side device corresponding to the current serving cell, etc., in This is not specifically limited.

As an optional implementation manner, the terminal may perform voice fallback preferentially according to the target solution indicated by the first network side device.

In this embodiment, the terminal receives the first indication information from the first network side device, so as to determine which scheme to apply to reduce the EPS/RAT Fallback delay according to the indication of the first indication information. For example: when the first network-side device indicates that it supports scheme 1 and scheme 3, the first network-side device may send first indication information to the terminal, wherein, if the first indication information is "0" When , indicate that the terminal applies scheme 1; if the first indication information is "1", indicate that the terminal applies scheme 3. Alternatively, when the first indication information appears, the terminal selects scheme 1, and when the first indication information does not appear, the terminal judges which scheme to apply according to other information.

Wherein, the first indication information may be carried in at least one of the following:

A system information block (System Information Block, SIB) message, an RRC release (Release) message, and configuration messages related to the target solution.

Wherein, the configuration message related to the target solution can be used for any process of configuring the target solution, for example: the configuration message is a measurement configuration message used to configure the advanced measurement (that is, the first measurement) or the network side prepares in advance The measurement configuration information, etc., are not exhaustive here.

It is worth noting that the foregoing embodiments of determining the target solution may be combined, that is, the terminal may determine the target solution according to at least two items of the target information. For example: performing voice fallback according to the scheme jointly supported by the terminal and the first network-side device, or performing voice fallback according to the scheme with the highest priority among the schemes jointly supported by the terminal and the first network-side device fallback, or perform voice fallback according to the solution indicated by the first network-side device, which is jointly supported by the terminal and the first network-side device, and is not exhaustive here.

As an optional implementation manner, the terminal determines the target solution according to the target information, including:

The terminal acquires a fifth solution supported by the first network side device;

When the number of the fifth scheme is one, if the terminal supports the fifth scheme, the terminal determines that the target scheme is the fifth scheme; or,

When the number of the fifth schemes is at least two, if the terminal supports one of the fifth schemes, the terminal determines that the target scheme is the fifth scheme supported by the terminal ;or,

When the number of the fifth schemes is at least two, if the terminal supports at least two of the fifth schemes, the terminal, according to the target information except the first capability information and Other information other than the second capability information determines the target solution from the fifth solution supported by the terminal.

In practice, the above-mentioned fifth scheme may include at least one of the first scheme, the second scheme, the third scheme and the fourth scheme listed in the above-mentioned embodiment, and the first scheme may be divided into the first scheme and the first scheme. The sub-scheme, the second sub-scheme and the third sub-scheme will not be repeated here.

case one

If the first network-side device only supports one of the M solutions, the terminal judges whether the solution supported by the first network-side device can be applied according to its own capabilities.

For example: if the terminal has the ability to support the scheme, the terminal applies the scheme; if the terminal does not have the ability to support the scheme, the terminal cannot apply the EPS/RAR Fallback scheme.

case two

If the first network-side device supports at least two of the M solutions, and the terminal judges according to its own capabilities that it can support one of the solutions supported by the first network-side device, the application terminal and the second This solution is jointly supported by a network side device.

Case three

If the first network-side device supports at least two of the M schemes, and the terminal can also support at least two of the schemes supported by the first network-side device, the terminal may further Determine the method to determine which method to reduce the delay of EPS/RAT Fallback to apply.

For example: according to the first indication information, determine one of the solutions supported by the terminal and the first network side device as the target solution; according to the priority order of the M solutions, determine the target solution from the terminal and the Determining the one with the highest priority among the schemes commonly supported by the first network-side device as the target scheme; or, the first indication information indicates at least two of the schemes jointly supported by the terminal and the first network-side device In this case, further according to the priority order of the M schemes, determine the one with the highest priority as the target scheme among the schemes supported by the terminal and the first network side device and indicated by the first indication information .

The voice fallback method provided in the embodiment of the present application may be executed by a voice fallback device. In the embodiment of the present application, the voice fallback device performed by the voice fallback device is taken as an example to illustrate the voice fallback device provided in the embodiment of the present application.

Referring to FIG. 6, the voice fallback device provided by the embodiment of the present application can be applied to a terminal. As shown in FIG. 6, the voice fallback device 600 can include the following modules:

A determining module 601, configured to determine a target solution according to the target information;

An execution module 602, configured to perform voice fallback according to the target solution;

Wherein, the target scheme is used to reduce the delay of the voice fallback, and the target information includes at least one of the following:

first capability information of the terminal;

Optionally, the voice fallback includes Evolved Packet System EPS Fallback or Radio Access Technology RAT Fallback.

Optionally, the target solution includes any of the following:

The third solution is to indicate that when the terminal is in the RRC idle state/deactivated state, if it receives a paging message carrying the first information or a high-layer signaling carrying the first information, the The terminal carries second indication information in the RRC connection establishment request or RRC connection recovery request sent by the terminal, the second indication information is used to instruct the terminal to establish or restore the RRC connection based on the first information, and the terminal is establishing Or receive the measurement configuration information of the first network side device after the RRC connection is restored, where the measurement configuration information is used to configure the measurement related to the voice fallback;

Optionally, the first solution includes:

The second sub-solution is to instruct the terminal to start performing the voice fallback when receiving a paging message carrying the first information or a high-level signaling carrying the first information in the RRC idle state/deactivated state the relevant first measurement; or,

The third sub-solution is to instruct the terminal to start performing fallback with the voice when it receives a paging message carrying the first information or a high-layer signaling carrying the first information in the RRC idle state/deactivated state Related first measurement, and in the case that the terminal has not completed the first measurement in the RRC idle state/deactivation state, the terminal receives the first network-side device within the first time period The measurement configuration information prepared in advance continues to perform the first measurement after the RRC connection is established or restored, the measurement configuration information is used to configure the measurement related to the voice fallback, and the terminal is in the first time period The RRC idle state/deactivation state.

Optionally, the first information includes at least one of the following:

The indication information of the voice fallback.

Optionally, when the target information includes the first capability information, the determining module 601 is specifically configured to:

Determine the target solution supported by the terminal according to the first capability information.

Optionally, when the target information includes the second capability information, the determining module 601 is specifically configured to:

Determine the target solution supported by the first network side device according to the second capability information.

Optionally, the second capability information includes second information from the first network side device, where the second information is used to indicate the target solution supported by the first network side device.

Optionally, the second information includes indication information of the target solution, or, the second information includes configuration information related to configuring the terminal to execute the target solution.

Optionally, the priority information of the M solutions is predefined by the protocol, or the priority information of the M solutions is carried in the configuration information of the target solution, or the priority information of the M solutions The information is carried in the indication message received by the terminal from the third network side device.

Optionally, the determination module 601 includes:

an acquiring unit, configured to acquire a fifth solution supported by the first network side device;

A first determining unit, configured to determine that the target solution is the fifth solution if the terminal supports the fifth solution when the number of the fifth solution is one; or,

The second determining unit is configured to determine that the target solution is all supported by the terminal if the terminal supports one of the fifth solutions when the number of the fifth solutions is at least two. the fifth option mentioned above; or,

The third determining unit is configured to: when the number of the fifth schemes is at least two, if the terminal supports at least two of the fifth schemes, according to the target information except the first Determining the target solution from the fifth solution supported by the terminal based on capability information and other information other than the second capability information.

Optionally, the first indication information is carried in at least one of the following:

A system information block SIB message, an RRC Release message, and configuration messages related to the target solution.

The voice fallback apparatus 600 in the embodiment of the present application may be an electronic device, such as an electronic device with an operating system, or a component of the electronic device, such as an integrated circuit or a chip. The electronic device may be a terminal, or other devices other than the terminal. Exemplarily, the terminal may include, but not limited to, the types of terminal 11 listed above, and other devices may be servers, Network Attached Storage (NAS), etc., which are not specifically limited in this embodiment of the present application.

The voice fallback device 600 provided in the embodiment of the present application can implement various processes implemented in the method embodiment shown in FIG. 5 and achieve the same technical effect. To avoid repetition, details are not repeated here.

Optionally, as shown in FIG. 7 , this embodiment of the present application also provides a communication device 700, including a processor 701 and a memory 702, and the memory 702 stores programs or instructions that can run on the processor 701, for example , when the communication device 700 is a terminal, when the program or instruction is executed by the processor 701, each step of the voice fallback method embodiment described above can be implemented, and the same technical effect can be achieved. To avoid repetition, details are not repeated here.

The embodiment of the present application also provides a terminal, including a processor and a communication interface, the processor is used to determine a target solution according to the target information, and the communication interface is used to perform voice fallback according to the target solution;

first capability information of the terminal;

This terminal embodiment corresponds to the above-mentioned terminal-side method embodiment, and each implementation process and implementation mode of the above-mentioned method embodiment can be applied to this terminal embodiment, and can achieve the same technical effect. Specifically, FIG. 8 is a schematic diagram of a hardware structure of a terminal implementing an embodiment of the present application.

The terminal 800 includes but not limited to: a radio frequency unit 801, a network module 802, an audio output unit 803, an input unit 804, a sensor 805, a display unit 806, a user input unit 807, an interface unit 808, a memory 809, and a processor 810, etc. At least some parts.

Those skilled in the art can understand that the terminal 800 may also include a power supply (such as a battery) for supplying power to various components, and the power supply may be logically connected to the processor 810 through the power management system, so as to manage charging, discharging, and power consumption through the power management system. Management and other functions. The terminal structure shown in FIG. 8 does not constitute a limitation on the terminal, and the terminal may include more or fewer components than shown in the figure, or combine some components, or arrange different components, which will not be repeated here.

It should be understood that, in the embodiment of the present application, the input unit 804 may include a graphics processing unit (Graphics Processing Unit, GPU) 8041 and a microphone 8042, and the graphics processor 8041 is used in a video capture mode or an image capture mode by an image capture device ( Such as the image data of the still picture or video obtained by the camera) for processing. The display unit 806 may include a display panel 8061, and the display panel 8061 may be configured in the form of a liquid crystal display, an organic light emitting diode, or the like. The user input unit 807 includes at least one of a touch panel 8071 and other input devices 8072 . The touch panel 8071 is also called a touch screen. The touch panel 8071 may include two parts, a touch detection device and a touch controller. Other input devices 8072 may include, but are not limited to, physical keyboards, function keys (such as volume control buttons, switch buttons, etc.), trackballs, mice, and joysticks, which will not be repeated here.

In this embodiment of the application, after the radio frequency unit 801 receives the downlink data from the network side device, it can transmit it to the processor 810 for processing; in addition, the radio frequency unit 801 can send the uplink data to the network side device. Generally, the radio frequency unit 801 includes, but is not limited to, an antenna, an amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like.

The memory 809 can be used to store software programs or instructions as well as various data. The memory 809 may mainly include a first storage area for storing programs or instructions and a second storage area for storing data, wherein the first storage area may store an operating system, an application program or instructions required by at least one function (such as a sound playing function, image playback function, etc.), etc. Furthermore, memory 809 may include volatile memory or nonvolatile memory, or, memory 809 may include both volatile and nonvolatile memory. Among them, the non-volatile memory can be read-only memory (Read-Only Memory, ROM), programmable read-only memory (Programmable ROM, PROM), erasable programmable read-only memory (Erasable PROM, EPROM), electronically programmable Erase Programmable Read-Only Memory (Electrically EPROM, EEPROM) or Flash. Volatile memory can be random access memory (Random Access Memory, RAM), static random access memory (Static RAM, SRAM), dynamic random access memory (Dynamic RAM, DRAM), synchronous dynamic random access memory (Synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (Double Data Rate SDRAM, DDRSDRAM), enhanced synchronous dynamic random access memory (Enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (Synch link DRAM , SLDRAM) and Direct Memory Bus Random Access Memory (Direct Rambus RAM, DRRAM). The memory 809 in the embodiment of the present application includes but is not limited to these and any other suitable types of memory.

The processor 810 may include one or more processing units; optionally, the processor 810 integrates an application processor and a modem processor, wherein the application processor mainly processes operations related to the operating system, user interface, and application programs, etc., Modem processors mainly process wireless communication signals, such as baseband processors. It can be understood that the foregoing modem processor may not be integrated into the processor 810 .

Wherein, the processor 810 is configured to determine the target solution according to the target information;

A radio frequency unit 801, configured to perform voice fallback according to the target solution;

first capability information of the terminal;

Optionally, the target solution includes any of the following:

The third solution is to indicate that when the terminal is in the RRC idle state/deactivated state, if the paging message carrying the first information or the high-level signaling carrying the first information is received, the terminal Carry second indication information in the sent RRC connection establishment request or RRC connection recovery request, where the second indication information is used to instruct the terminal to establish or restore the RRC connection based on the first information, and the terminal is establishing or restoring After the RRC connection is restored, receive measurement configuration information of the first network side device, where the measurement configuration information is used to configure the measurement related to the voice fallback;

Optionally, the first solution includes:

Optionally, the first information includes at least one of the following:

The indication information of the voice fallback.

Optionally, when the target information includes the first capability information, the determining the target solution according to the target information performed by the processor 810 includes:

Optionally, when the target information includes the second capability information, the determining the target solution according to the target information performed by the processor 810 includes:

Optionally, the determining the target solution according to the target information executed by the processor 810 includes:

Obtain the fifth solution supported by the first network side device through the radio frequency unit 801;

When the number of the fifth scheme is one, if the terminal supports the fifth scheme, the processor 810 determines that the target scheme is the fifth scheme; or,

When the number of the fifth schemes is at least two, if the terminal supports one of the fifth schemes, the processor 810 determines that the target scheme is the fifth scheme supported by the terminal ;or,

When the number of the fifth schemes is at least two, if the terminal supports at least two of the fifth schemes, the processor 810, according to the target information except the first capability information and Other information other than the second capability information determines the target solution from the fifth solution supported by the terminal.

The terminal 800 provided in the embodiment of the present application can implement various processes implemented by the voice fallback device 600 shown in FIG. 6 , and can achieve the same beneficial effects. To avoid repetition, details are not repeated here.

The embodiment of the present application also provides a readable storage medium, on which a program or instruction is stored, and when the program or instruction is executed by a processor, each process of the above embodiment of the voice fallback method is realized, and the same To avoid repetition, the technical effects will not be repeated here.

Wherein, the processor is the processor in the terminal described in the foregoing embodiments. The readable storage medium includes a computer-readable storage medium, such as a computer read-only memory ROM, a random access memory RAM, a magnetic disk or an optical disk, and the like.

The embodiment of the present application further provides a chip, the chip includes a processor and a communication interface, the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the above voice fallback method embodiment Each process can achieve the same technical effect, so in order to avoid repetition, it will not be repeated here.

It should be understood that the chip mentioned in the embodiment of the present application may also be called a system-on-chip, a system-on-chip, a system-on-a-chip, or a system-on-a-chip.

The embodiment of the present application further provides a computer program product, the computer program is stored in a storage medium, and the computer program product is executed by at least one processor to implement the various processes of the voice fallback method embodiment above, and can achieve The same technical effects are not repeated here to avoid repetition.

It should be noted that, in this document, the term "comprising", "comprising" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article or apparatus comprising a set of elements includes not only those elements, It also includes other elements not expressly listed, or elements inherent in the process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved. Functions are performed, for example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

Through the description of the above embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus a necessary general-purpose hardware platform, and of course also by hardware, but in many cases the former is better implementation. Based on such an understanding, the technical solution of the present application can be embodied in the form of computer software products, which are stored in a storage medium (such as ROM/RAM, magnetic disk, etc.) , CD-ROM), including several instructions to make a terminal (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) execute the methods described in the various embodiments of the present application.

The embodiments of the present application have been described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementations. The above-mentioned specific implementations are only illustrative and not restrictive. Those of ordinary skill in the art will Under the inspiration of this application, without departing from the purpose of this application and the scope of protection of the claims, many forms can also be made, all of which belong to the protection of this application.

Claims

A voice fallback method, comprising:

The terminal determines the target scheme according to the target information;

The terminal performs voice fallback according to the target solution;

Wherein, the target solution is used to reduce the delay of the voice fallback, and the target information includes at least one of the following:

first capability information of the terminal;

Second capability information of the first network-side device, where the first network-side device is the network-side device corresponding to the serving cell of the terminal;

First instruction information from the second network side device, where the first instruction information is used to indicate or configure the target solution;

Priority information of M solutions, where the M solutions include the target solution, and M is an integer greater than 1.
The method according to claim 1, wherein the voice fallback comprises Evolved Packet System (EPS) Fallback or Radio Access Technology (RAT) Fallback.
The method according to claim 1 or 2, wherein the target solution comprises any of the following:

The first solution is to instruct the terminal to perform the first measurement related to the voice fallback in the radio resource control RRC idle state/deactivated state;

The second solution is to instruct the terminal to receive a paging message carrying the first information or a high-layer signaling carrying the first information in the RRC idle state/deactivation state, and the terminal is in the RRC idle state/deactivation state. performing cell selection or reselecting to an Evolved Universal Mobile Network System Terrestrial Radio Access E-UTRAN cell in an activated state, and the first information is related to the voice fallback;

The third solution is to instruct the terminal to receive the paging message carrying the first information or the high-layer signaling carrying the first information when it is in the RRC idle state/deactivated state, then the terminal will The sent RRC connection establishment request or RRC connection recovery request carries second indication information, the second indication information is used to instruct the terminal to establish or restore the RRC connection based on the first information, and the terminal is establishing or restoring receiving measurement configuration information of the first network side device after the RRC connection, where the measurement configuration information is used to configure the measurement related to the voice fallback;

The fourth solution is to instruct the terminal to ignore the frequency point information indicated by the first network side device if the measurement result of the adjacent cell is not obtained when performing the voice fallback based on redirection, and the adjacent cell is E-UTRAN cell.
The method according to claim 3, wherein the first scheme comprises:

The first sub-solution, instructing the terminal to perform a first measurement related to the voice fallback in the RRC idle state/deactivated state; or,

The second sub-solution indicates that when the terminal receives the paging message carrying the first information or the high-layer signaling carrying the first information in the RRC idle state/deactivated state, it starts to perform the voice fallback related the first measurement of ; or,

The third sub-solution is to instruct the terminal to start to perform the voice fallback-related operation when receiving the paging message carrying the first information or the high-level signaling carrying the first information in the RRC idle state/deactivated state. , and if the terminal has not completed the first measurement in the RRC idle state/deactivation state, the terminal advances within the first time period according to the received first network-side device The prepared measurement configuration information continues to perform the first measurement after the RRC connection is established or restored, the measurement configuration information is used to configure the measurement related to the voice fallback, and the terminal is in the first time period The RRC idle state/deactivation state is described above.
The method according to claim 3 or 4, wherein the first information includes at least one of the following:

Indication information of a voice call, where the voice call includes an Internet Protocol Multimedia Subsystem IMS voice call;

The indication information of the voice fallback.
The method according to any one of claims 1 to 5, wherein, when the target information includes the first capability information, the terminal determines a target solution according to the target information, including:

The terminal determines the target solution supported by the terminal according to the first capability information.
The method according to any one of claims 1 to 5, wherein, when the target information includes the second capability information, the terminal determines a target solution according to the target information, comprising:

The terminal determines the target solution supported by the first network side device according to the second capability information.
The method according to any one of claims 1 to 5, wherein the priority information of the M solutions is predefined by the protocol, or the priority information of the M solutions is carried in the configuration of the target solution information, or, the priority information of the M schemes is carried in the indication message received by the terminal from the third network side device.
The method according to any one of claims 1 to 8, wherein the terminal determines the target solution according to the target information, including:

The terminal acquires a fifth solution supported by the first network side device;

When the number of the fifth scheme is one, if the terminal supports the fifth scheme, the terminal determines that the target scheme is the fifth scheme; or,

When the number of the fifth schemes is at least two, if the terminal supports one of the fifth schemes, the terminal determines that the target scheme is the fifth scheme supported by the terminal ;or,

When the number of the fifth schemes is at least two, if the terminal supports at least two of the fifth schemes, the terminal, according to the target information except the first capability information and Other information other than the second capability information determines the target solution from the fifth solution supported by the terminal.
The method according to any one of claims 1 to 9, wherein the first indication information is carried in at least one of the following:

A system information block SIB message, an RRC Release message, and configuration messages related to the target solution.
A voice fallback device, wherein, applied to a terminal, the device includes:

A determining module, configured to determine the target solution according to the target information;

An execution module, configured to perform voice fallback according to the target solution;

Wherein, the target solution is used to reduce the delay of the voice fallback, and the target information includes at least one of the following:

first capability information of the terminal;

Second capability information of the first network-side device, where the first network-side device is the network-side device corresponding to the serving cell of the terminal;

First instruction information from the second network side device, where the first instruction information is used to indicate or configure the target solution;

Priority information of M solutions, where the M solutions include the target solution, and M is an integer greater than 1.
The device according to claim 11, wherein the voice fallback comprises Evolved Packet System (EPS) Fallback or Radio Access Technology (RAT) Fallback.
The apparatus according to claim 11 or 12, wherein the target solution comprises any of the following:

The first solution is to instruct the terminal to perform the first measurement related to the voice fallback in the radio resource control RRC idle state/deactivated state;

The second solution is to instruct the terminal to receive a paging message carrying the first information or a high-level signaling carrying the first information in the RRC idle state/deactivation state, and the terminal is in the RRC idle state / Perform cell selection or reselection to an Evolved Universal Mobile Network System Terrestrial Radio Access E-UTRAN cell in a deactivated state, and the first information is related to the voice fallback;

The third solution is to indicate that when the terminal is in the RRC idle state/deactivated state, if it receives a paging message carrying the first information or a high-layer signaling carrying the first information, the The terminal carries second indication information in the RRC connection establishment request or RRC connection recovery request sent by the terminal, the second indication information is used to instruct the terminal to establish or restore the RRC connection based on the first information, and the terminal is establishing Or receive the measurement configuration information of the first network side device after the RRC connection is restored, where the measurement configuration information is used to configure the measurement related to the voice fallback;

The fourth solution is to instruct the terminal to ignore the frequency point information indicated by the first network side device if the measurement result of the adjacent cell is not obtained when performing the voice fallback based on redirection, and the adjacent cell is E-UTRAN cell.
The apparatus of claim 13, wherein the first scheme comprises:

The first sub-solution, instructing the terminal to perform a first measurement related to the voice fallback in the RRC idle state/deactivated state; or,

The second sub-solution is to instruct the terminal to start performing the voice fallback when receiving a paging message carrying the first information or a high-level signaling carrying the first information in the RRC idle state/deactivated state the relevant first measurement; or,

The third sub-solution is to instruct the terminal to start performing fallback with the voice when it receives a paging message carrying the first information or a high-layer signaling carrying the first information in the RRC idle state/deactivated state Related first measurement, and in the case that the terminal has not completed the first measurement in the RRC idle state/deactivation state, the terminal receives the first network-side device within the first time period The measurement configuration information prepared in advance continues to perform the first measurement after the RRC connection is established or restored, the measurement configuration information is used to configure the measurement related to the voice fallback, and the terminal is in the first time period The RRC idle state/deactivation state.
The device according to claim 13 or 14, wherein the first information includes at least one of the following:

Indication information of a voice call, where the voice call includes an Internet Protocol Multimedia Subsystem IMS voice call;

The indication information of the voice fallback.
The device according to any one of claims 11 to 15, wherein, when the target information includes the first capability information, the determining module is specifically configured to:

Determine the target solution supported by the terminal according to the first capability information.
The device according to any one of claims 11 to 15, wherein, when the target information includes the second capability information, the determining module is specifically configured to:

Determine the target solution supported by the first network side device according to the second capability information.
The device according to any one of claims 11 to 15, wherein the priority information of the M schemes is predefined by the protocol, or the priority information of the M schemes is carried in the configuration of the target scheme information, or, the priority information of the M schemes is carried in the indication message received by the terminal from the third network side device.
The device according to any one of claims 11 to 18, wherein the determination module includes:

an acquiring unit, configured to acquire a fifth solution supported by the first network side device;

A first determining unit, configured to determine that the target solution is the fifth solution if the terminal supports the fifth solution when the number of the fifth solution is one; or,

The second determining unit is configured to determine that the target solution is all supported by the terminal if the terminal supports one of the fifth solutions when the number of the fifth solutions is at least two. the fifth option mentioned above; or,

The third determining unit is configured to: when the number of the fifth schemes is at least two, if the terminal supports at least two of the fifth schemes, according to the target information except the first Determining the target solution from the fifth solution supported by the terminal based on capability information and other information other than the second capability information.
The device according to any one of claims 11 to 19, wherein the first indication information is carried in at least one of the following:

A system information block SIB message, an RRC Release message, and configuration messages related to the target solution.
A terminal, including a processor and a memory, the memory stores programs or instructions that can run on the processor, and when the programs or instructions are executed by the processor, any of claims 1 to 10 can be implemented. A step of the voice fallback method described in one item.
A readable storage medium, wherein a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the steps of the voice fallback method according to any one of claims 1 to 10 are realized .
A chip, comprising a processor and a communication interface, wherein the communication interface is coupled to the processor, and the processor is used to run programs or instructions to implement the voice fallback according to any one of claims 1-10 method steps.
A computer program product, wherein the program product is stored in a non-volatile storage medium, and the program product is executed by at least one processor to implement the voice fallback according to any one of claims 1-10 method steps.