CN111164995B

CN111164995B - Method and terminal for emergency call

Info

Publication number: CN111164995B
Application number: CN201880064483.8A
Authority: CN
Inventors: 周志伟; 姜印清
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2018-03-08
Filing date: 2018-03-08
Publication date: 2021-12-28
Anticipated expiration: 2038-03-08
Also published as: CN111164995A; CN114430545A; WO2019169597A1

Abstract

The application provides an emergency call method and a terminal, wherein the method comprises the following steps: a terminal acquires an emergency call request; the terminal detects a first frequency band of a mobile communication network; if the energy of the first frequency band is larger than a preset emergency call threshold, the terminal searches a cell in the first frequency band, wherein the emergency call threshold is larger than a first threshold for scanning the frequency band of the mobile communication network; and when the terminal successfully searches the first cell in the first frequency band, initiating an emergency call through the first cell. According to the technical scheme of the embodiment of the application, the network is searched by adopting the preset emergency call threshold, so that the time for searching the network by the emergency call is shortened, and the experience of a user is improved.

Description

Method and terminal for emergency call

Technical Field

The present application relates to the field of terminals, and in particular, to a method for an emergency call of a terminal and a terminal.

Background

When a Wireless-Fidelity (Wifi) signal is good and a mobile signal is weak in an indoor environment. The Voice call service based on Wifi (Voice Over Wifi, voicewifi) has relatively good call quality, while the signal quality of the Voice call service established through the mobile communication network is poor, even the Voice call service cannot be successfully established. However, according to the domain selection priority of the emergency call, the emergency call needs to be initiated on the mobile communication network first. A voice call service can be initiated through a Wifi wireless network only when an emergency call is not successfully initiated in a mobile communication network, for example, in a Circuit Switching (CS) domain of the mobile communication network or a Long Term Evolution (LTE) domain of an IP Multimedia Subsystem (IMS) universal mobile telecommunications technology (IMS).

Therefore, when the signal quality of the Wifi wireless network is good and the signal quality of the mobile network is weak, it may take a long time to initiate an emergency call on the Wifi wireless network, thereby resulting in poor user experience.

Disclosure of Invention

The application provides an emergency call method and terminal, which are beneficial to improving user experience.

In a first aspect, a method for emergency calling is provided, including: a terminal acquires an emergency call request; the terminal detects a first frequency band of a mobile communication network; if the energy of the first frequency band is larger than a preset emergency call threshold, the terminal searches a cell in the first frequency band, wherein the emergency call threshold is larger than a first threshold for scanning the frequency band of the mobile communication network; when the terminal successfully searches the first cell in the first frequency band, the terminal initiates an emergency call through the first cell.

In the technical scheme of the embodiment of the application, the network is searched by adopting the preset emergency call threshold, wherein the preset emergency threshold is larger than the first threshold used by the mobile communication network for searching the network, so that the time for searching the network for the emergency call is shortened, and the experience of a user is improved.

With reference to the first aspect, in certain implementations of the first aspect, before the terminal detects the first frequency band of the mobile communication network, the method further includes: the terminal determines that the signal quality of the Wifi wireless network is greater than a preset threshold.

In some possible implementations, for different cases where the mobile communication network includes a circuit switched CS domain and/or an IMS LTE domain, the domain selection manner for the terminal to initiate the emergency call may include, but is not limited to, the following manners:

the first method is as follows: the terminal can initiate an emergency call in the CS domain first, and then initiate an emergency call in the IMS LTE if the CS domain does not successfully initiate the emergency call.

When the terminal does not successfully initiate the emergency call in the IMS LTE domain, the terminal initiates the emergency call in an IP Multimedia Subsystem (IMS) Wireless-Fidelity (WIFI) domain, that is, an IMS WIFI domain.

The second method comprises the following steps: the terminal can initiate an emergency call in the IMS LTE domain first, and then initiate an emergency call in the CS domain if the IMS LTE domain does not successfully initiate an emergency call.

And when the terminal does not successfully initiate the emergency call in the CS domain, the emergency call is initiated in the IMS WIFI domain.

With reference to the first aspect, in certain implementations of the first aspect, the first threshold is used for frequency band scanning of the mobile communication network during a non-emergency call.

In some possible implementations, the preset emergency call threshold may be used in scenarios including, but not limited to:

scene one: the threshold of the CS domain emergency call may be a preset emergency call threshold, and the threshold of the IMS LTE domain emergency call may be a scanning threshold of band energy when the call is in a normal state, that is, the threshold of the IMS LTE domain emergency call may be a first threshold of the mobile communication network band scanning.

Scene two: the threshold of the IMS LTE emergency call may be a preset emergency call threshold, and the threshold of the CS emergency call may be a scanning threshold of band energy when the call is in a normal state, that is, the threshold of the CS emergency call may be a first threshold of the mobile communication network band scanning.

Scene three: the threshold of the CS domain emergency call and the threshold of the IMS LTE domain emergency call may both be preset emergency call thresholds.

In the technical scheme of the embodiment of the application, when the emergency call is initiated, the time of the emergency call for searching the network in the mobile communication network is shortened by adopting the preset threshold of the emergency call in the mobile communication network, so that the waiting time of a user is reduced, and the experience of the user is improved.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: when the terminal does not successfully search the cell in the first frequency band, or when the terminal does not successfully initiate the emergency call in the first frequency band, the terminal detects the second frequency band of the mobile communication network.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: when the terminal does not successfully search the cells in all frequency bands of the mobile communication network, or when the terminal does not successfully initiate the emergency call in all frequency bands of the mobile communication network, the terminal initiates the emergency call through the Wifi wireless network.

With reference to the first aspect, in certain implementations of the first aspect, the method further includes: and if the terminal successfully initiates the emergency call through the Wifi wireless network, the terminal initiates the next emergency call through the Wifi wireless network.

With reference to the first aspect, in certain implementations of the first aspect, before the terminal initiates the next emergency call through the Wifi wireless network, the method further includes: the terminal determines that the signal quality of the Wifi wireless network is greater than a predetermined threshold.

With reference to the first aspect, in certain implementations of the first aspect, the terminal and the Wifi wireless network are kept in a connected state from when the terminal successfully originates the emergency call to when the terminal originates the next emergency call.

In the technical scheme of the embodiment of the application, the Wifi wireless network which has successfully initiated the emergency call and is always in a connection state with the terminal and has good signal quality is preferentially adopted to initiate the emergency call, so that the efficiency of searching the network when the terminal initiates the emergency call can be improved, and the experience of a user is improved.

With reference to the first aspect, in certain implementations of the first aspect, the terminal does not camp on the mobile communication network before the terminal detects the first frequency band of the mobile communication network.

With reference to the first aspect, in certain implementations of the first aspect, before the terminal detects the first frequency band of the mobile communication network, the method includes: the terminal is camped on a second cell of the mobile communication network, and the terminal has not successfully initiated an emergency call in the second cell.

With reference to the first aspect, in some implementations of the first aspect, the initiating the emergency call through the first cell includes:

the terminal initiates an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than the duration of the mobile communication network call redial timer.

With reference to the first aspect, in certain implementations of the first aspect, the initiating the emergency call through the first cell based on the emergency call redial timer includes: and if the emergency call initiated by the first cell fails, the emergency call is redialed before the emergency call redialing timer is overtime.

In the technical scheme of the embodiment of the application, when the terminal initiates the emergency call, the terminal can initiate redialing again in a short time when the emergency call fails by adopting the emergency call redialing timer, so that the waiting time of a user during the emergency call is shortened, and the experience of the user is improved.

In a second aspect, a method for emergency calling is provided, including: when the terminal is not in an emergency call, the terminal adopts a first threshold to carry out quality detection on a first frequency band; during emergency call, the terminal adopts a preset emergency call threshold to carry out quality detection on a first frequency band; when a terminal acquires an emergency call request, the terminal detects a first frequency band of a mobile communication network; if the energy of the first frequency band is larger than a preset emergency call threshold, the terminal searches a cell in the first frequency band, wherein the emergency call threshold is larger than a first threshold for scanning the frequency band of the mobile communication network; when the terminal successfully searches the first cell in the first frequency band, the terminal initiates an emergency call through the first cell.

It should be appreciated that in embodiments of the present application, emergency calls, for example, dialing numbers such as 911, 110, 119, 120 alert or distress numbers; non-emergency calls, such as dialing 10086 or normal number calls.

With reference to the second aspect, in certain implementations of the second aspect, the method further includes: and if the terminal successfully initiates the emergency call through the Wifi wireless network, the terminal initiates the next emergency call through the Wifi wireless network.

With reference to the second aspect, in some implementations of the second aspect, before the terminal initiates the next emergency call through the Wifi wireless network, the method further includes: the terminal determines that the signal quality of the Wifi wireless network is greater than a predetermined threshold.

With reference to the second aspect, in some implementations of the second aspect, the terminal and the Wifi wireless network are kept in a connected state from when the terminal successfully initiates the emergency call to when the terminal initiates the next emergency call.

With reference to the second aspect, in some implementations of the second aspect, the terminal does not camp on the mobile communication network before the terminal detects the first frequency band of the mobile communication network.

With reference to the second aspect, in some implementations of the second aspect, before the terminal detects the first frequency band of the mobile communication network, the method includes: the terminal is camped on a second cell of the mobile communication network, and the terminal has not successfully initiated an emergency call in the second cell.

With reference to the second aspect, in some implementations of the second aspect, the initiating the emergency call through the first cell includes:

With reference to the second aspect, in some implementations of the second aspect, the initiating the emergency call through the first cell based on the emergency call redial timer includes: and if the emergency call initiated by the first cell fails, the emergency call is redialed before the emergency call redialing timer is overtime.

In a third aspect, a method for emergency calling is provided, including: the terminal searches the cell in the mobile communication network; when the mobile communication network successfully searches the first cell, the terminal initiates an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than that of the mobile communication network call redial timer.

According to the technical scheme, when the terminal initiates the emergency call, the emergency call redialing timer is adopted, so that the terminal can initiate redialing again in a short time when the emergency call fails, the waiting time of a user during the emergency call is shortened, and the experience of the user is improved.

With reference to the third aspect, in some implementations of the third aspect, initiating the emergency call through the first cell based on the emergency call redial timer includes: and if the emergency call initiated by the first cell fails, the emergency call is redialed before the emergency call redialing timer is overtime.

In a fourth aspect, a method for emergency calling is provided, including: if the terminal carries out non-emergency call, a mobile communication network call redial timer is adopted to redial when the non-emergency call fails; if the terminal carries out emergency call, an emergency call redialing timer is adopted to redial when the emergency call fails; when the terminal makes an emergency call, the terminal searches a cell in a mobile communication network; when the mobile communication network successfully searches the first cell, the terminal initiates an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than that of the mobile communication network call redial timer.

With reference to the fourth aspect, in some implementations of the fourth aspect, the initiating the emergency call through the first cell based on the emergency call redial timer includes: and if the emergency call initiated by the first cell fails, the emergency call is redialed before the emergency call redialing timer is overtime.

In a fifth aspect, a method for emergency calling is provided, including: the terminal determines that a first emergency call is successfully initiated through a Wifi wireless network; and when the terminal successfully initiates the first emergency call and the terminal initiates a second emergency call, the terminal and the Wifi wireless network are always in a connected state, and the terminal initiates the second emergency call through the Wifi wireless network.

According to the technical scheme of the embodiment of the application, the emergency call is initiated by the Wifi wireless network which is successfully initiated and always connected with the terminal, so that the efficiency of searching the network when the terminal initiates the emergency call can be improved, and the experience of a user is improved.

With reference to the fifth aspect, in certain implementations of the fifth aspect, the method further comprises: the terminal determines that the signal quality of the Wifi wireless network is greater than a predetermined threshold.

In a sixth aspect, a terminal is provided, including: a radio frequency circuit; one or more processors; a memory; a plurality of application programs; and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions which, when executed by the terminal, cause the terminal to perform the steps of:

acquiring an emergency call request; detecting a first frequency band of a mobile communication network; if the energy of the first frequency band is larger than a preset emergency call threshold, the terminal searches a cell in the first frequency band, wherein the emergency call threshold is larger than a first threshold for scanning a mobile communication network frequency band; and when the first cell is successfully searched in the first frequency band, initiating an emergency call through the first cell.

With reference to the sixth aspect, in some implementations of the sixth aspect, before the terminal detects the first frequency band of the mobile communication network, the instructions further include: and determining that the signal quality of the Wifi wireless network is greater than a preset threshold.

With reference to the sixth aspect, in some implementations of the sixth aspect, the first threshold is used for frequency band scanning of the mobile communication network during a non-emergency call.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the instructions further include: and when the cell is not successfully searched in the first frequency band, or when the emergency call is not successfully initiated in the first frequency band, detecting a second frequency band of the mobile communication network.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the instructions further include: and when the cells are not successfully searched in all frequency bands of the mobile communication network, or when the emergency call is not successfully initiated in all frequency bands of the mobile communication network, initiating the emergency call through the Wifi wireless network.

With reference to the sixth aspect, in certain implementations of the sixth aspect, the instructions further include: and if the emergency call is successfully initiated through the Wifi wireless network, initiating the next emergency call through the Wifi wireless network.

With reference to the sixth aspect, in some implementations of the sixth aspect, before the terminal initiates a next emergency call through the Wifi wireless network, the instructions further include: and determining that the signal quality of the Wifi wireless network is greater than a preset threshold.

With reference to the sixth aspect, in some implementation manners of the sixth aspect, the terminal and the Wifi wireless network are always kept in a connected state from when the terminal successfully initiates the emergency call to when the terminal initiates the next emergency call.

With reference to the sixth aspect, in some implementations of the sixth aspect, the terminal does not camp on the mobile communication network before the detecting of the first frequency band of the mobile communication network.

With reference to the sixth aspect, in some implementations of the sixth aspect, before the detecting the first frequency band of the mobile communication network, the terminal resides in a second cell of the mobile communication network, and the terminal has not successfully initiated an emergency call in the second cell.

With reference to the sixth aspect, in some implementations of the sixth aspect, the initiating the emergency call through the first cell includes:

and initiating an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than the duration of the mobile communication network call redial timer.

With reference to the sixth aspect, in some implementations of the sixth aspect, the initiating an emergency call through the first cell based on the emergency call redial timer includes:

and if the emergency call initiated by the first cell fails, the emergency call is redialed before the emergency call redialing timer is overtime.

In a seventh aspect, a terminal is provided, including: a radio frequency circuit; one or more processors; a memory; a plurality of application programs; and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions which, when executed by the terminal, cause the terminal to perform the steps of:

performing cell search in a mobile communication network;

when the mobile communication network successfully searches a first cell, initiating an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than the duration of the mobile communication network call redial timer.

With reference to the seventh aspect, in some implementations of the seventh aspect, the initiating an emergency call through the first cell based on the emergency call redial timer includes:

In an eighth aspect, there is provided a terminal comprising: a radio frequency circuit; one or more processors; a memory; a plurality of application programs; and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions which, when executed by the terminal, cause the terminal to perform the steps of:

determining that a first emergency call is successfully initiated through a Wifi wireless network;

and the terminal and the Wifi wireless network are always in a connected state from the time when the terminal successfully initiates the first emergency call to the time when the terminal initiates a second emergency call, and the terminal initiates the second emergency call through the Wifi wireless network.

With reference to the eighth aspect, in some implementations of the eighth aspect, the instructions further include: and determining that the signal quality of the Wifi wireless network is greater than a preset threshold.

In a ninth aspect, there is provided a terminal comprising: a processing unit for obtaining an emergency call request; the processing unit is further configured to detect a first frequency band of the mobile communication network; if the energy of the first frequency band is greater than a preset emergency call threshold, the processing unit is further configured to perform cell search in the first frequency band, where the emergency call threshold is greater than a first threshold for mobile communication network frequency band scanning; and the communication unit is used for initiating an emergency call through the first cell when the first cell is successfully searched in the first frequency band.

With reference to the ninth aspect, in some implementations of the ninth aspect, before the terminal detects the first frequency band of the mobile communication network, the processing unit is further configured to: and determining that the signal quality of the Wifi wireless network is greater than a preset threshold.

With reference to the ninth aspect, in some implementations of the ninth aspect, the first threshold is used for frequency band scanning of the mobile communication network during a non-emergency call.

With reference to the ninth aspect, in certain implementations of the ninth aspect, the processing unit is further configured to: and when the cell is not successfully searched in the first frequency band, or when the emergency call is not successfully initiated in the first frequency band, detecting a second frequency band of the mobile communication network.

With reference to the ninth aspect, in some implementations of the ninth aspect, the communication unit is further configured to: and when the cells are not successfully searched in all frequency bands of the mobile communication network, or when the emergency call is not successfully initiated in all frequency bands of the mobile communication network, initiating the emergency call through the Wifi wireless network.

With reference to the ninth aspect, in some implementations of the ninth aspect, the communication unit is further configured to: and if the terminal successfully initiates the emergency call through the Wifi wireless network, initiating the next emergency call through the Wifi wireless network.

With reference to the ninth aspect, in some implementations of the ninth aspect, before the terminal initiates a next emergency call through the Wifi wireless network, the processing unit is further configured to:

and determining that the signal quality of the Wifi wireless network is greater than a preset threshold.

With reference to the ninth aspect, in some implementation manners of the ninth aspect, the terminal and the Wifi wireless network are always kept in a connected state from when the terminal successfully initiates the emergency call to when the terminal initiates the next emergency call.

With reference to the ninth aspect, in some implementations of the ninth aspect, the terminal does not camp on the mobile communication network before the terminal detects the first frequency band of the mobile communication network.

With reference to the ninth aspect, in some implementations of the ninth aspect, before the terminal detects the first frequency band of the mobile communication network, the terminal camps on a second cell of the mobile communication network, and the terminal does not successfully initiate an emergency call in the second cell.

With reference to the ninth aspect, in some implementations of the ninth aspect, the communication unit is further configured to: and initiating an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than the duration of the mobile communication network call redial timer.

With reference to the ninth aspect, in some implementations of the ninth aspect, the processing unit is further configured to: and if the emergency call initiated by the first cell fails, the emergency call is redialed before the emergency call redialing timer is overtime.

In a tenth aspect, there is provided a terminal comprising: a processing unit for performing cell search in a mobile communication network; and the communication unit is used for initiating an emergency call through the first cell based on an emergency call redial timer when the processing unit successfully searches the first cell by the mobile communication network, wherein the duration of the emergency call redial timer is less than that of the mobile communication network call redial timer.

With reference to the tenth aspect, in certain implementations of the tenth aspect, the processing unit is further configured to: and if the emergency call initiated by the first cell fails, the emergency call is redialed before the emergency call redialing timer is overtime.

In an eleventh aspect, there is provided a terminal, including: the processing unit is used for determining that the terminal successfully initiates a first emergency call through a Wifi wireless network; and the communication unit is used for keeping the terminal and the Wifi wireless network in a connected state all the time from the time when the terminal successfully initiates the first emergency call to the time when the terminal initiates a second emergency call, and initiating the second emergency call through the Wifi wireless network.

With reference to the eleventh aspect, in certain implementations of the eleventh aspect, the signal quality of the Wifi wireless network is determined to be greater than a predetermined threshold.

In a twelfth aspect, there is provided a terminal comprising a memory for storing a computer program, a processor for calling and running the computer program from the memory, and a display, wherein when the program is run, the processor performs the method of the first aspect or any possible implementation manner of the first aspect.

In a thirteenth aspect, there is provided a computer readable medium for storing a computer program comprising instructions for performing the method of any one of the first to fifth aspects or any possible implementation thereof.

In a fourteenth aspect, there is provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of any of the first to fifth aspects described above or any possible implementation thereof.

Drawings

FIG. 1 is a schematic diagram of a system used in accordance with an embodiment of the present application.

Fig. 2 is a schematic flow chart diagram of a method of emergency calling according to one embodiment of the present application.

Fig. 3 is a schematic flow chart diagram of a method of emergency calling according to another embodiment of the present application.

Fig. 4 is a schematic flow chart diagram of a method of emergency calling according to another embodiment of the present application.

Fig. 5 is a schematic flow chart diagram of a method of emergency calling according to another embodiment of the present application.

Fig. 6 is a schematic block diagram of a terminal according to one embodiment of the present application.

Fig. 7 is a schematic block diagram of a terminal according to another embodiment of the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of a system applied to an embodiment of the present application. As shown in fig. 1, system 100 may include a network device 102 and

terminals

104 and 106, wherein the network device and the terminals are connected via a wireless connection. It should be understood that fig. 1 only illustrates that the system includes one network device, but the embodiment of the present application is not limited thereto, for example, the system may also include more network devices; similarly, the system may comprise more terminals. It should also be understood that the system may also be referred to as a network, and the embodiments of the present application are not limited thereto.

This specification describes various embodiments in connection with a terminal. A terminal may refer to a terminal device or a User Equipment (UE), an access terminal, a subscriber unit, a subscriber station, a mobile station, a remote terminal, a mobile device, a User terminal, a wireless communication device, a User agent, or a User Equipment. An access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with Wireless communication capability, a computing device or other processing device connected to a Wireless modem, a vehicle mounted device, a wearable device, a terminal in a future 5G Network or a terminal in a future evolved Public Land Mobile Network (PLMN) Network, etc.

By way of example and not limitation, in the embodiments of the present application, the terminal may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment, is the general term of applying wearable technique to carry out intelligent design, develop the equipment that can dress to daily wearing, like glasses, gloves, wrist-watch, dress and shoes etc.. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets for physical sign monitoring, smart jewelry and the like.

Various embodiments are described herein in connection with a network device. The Network device may be a device for communicating with a terminal, and the Network device may be a Base Transceiver Station (BTS) in a Global System for Mobile communications (GSM) or a Code Division Multiple Access (CDMA), a Base Station (NodeB, NB) in a Wideband Code Division Multiple Access (WCDMA) System, an evolved Node B (eNB, or eNodeB) in a Long Term Evolution (Long Term Evolution, LTE) System, a wireless controller in a Cloud Radio Access Network (CRAN) scenario, or a relay Station, an Access point, a vehicle-mounted device, a wearable device, a Network device in a future 5G Network, a Network device in a future evolved PLMN Network, or the like.

In addition, in this embodiment of the present application, a network device provides a service for a cell, and a terminal communicates with the network device through a transmission resource (for example, a frequency domain resource or a spectrum resource) used by the cell, where the cell may be a cell corresponding to the network device (for example, a base station), and the cell may belong to a macro base station or a base station corresponding to a Small cell (Small cell), where the Small cell may include: urban cells (Metro cells), Micro cells (Micro cells), Pico cells (Pico cells), Femto cells (Femto cells), and the like, and the small cells have the characteristics of small coverage area and low transmission power, and are suitable for providing high-rate data transmission services. In addition, the cell may also be a super cell (Hyper cell).

In the prior art, when a user initiates a common call, a terminal selects a domain for network search and registration according to the domain selection priority. Here, it is described that the priority of the mobile communication network is set to be higher than the priority of the IMS WIFI domain at the terminal. Wherein the mobile communication network comprises a circuit switched, CS, domain and/or an IMS, LTE, domain.

When the terminal receives the common call request of the user, it will first judge whether the terminal is already resident in the mobile communication network, if the terminal is already resident in the mobile communication network, the terminal directly initiates the common call through the mobile communication network.

If the terminal does not reside in the mobile communication network, the terminal starts to search the network and register the mobile communication network.

The method of WCDMA cell search in CS domain is taken as an example for explanation here. In the WCDMA system, a terminal needs to search for a network and initiate registration in order to acquire a service of the network, and a process of the terminal finding the network is called cell search. In the cell search in the prior art, a frequency band is acquired first. And extracting a coarse scanning frequency point according to a preset step in the acquired frequency band, and comparing a Received Signal Strength Indication (RSSI) value of the coarse scanning frequency point with a first threshold. When the RSSI value of the extracted rough scanning frequency point is larger than the first threshold, the frequency band where the frequency point is located is scanned finely, and the frequency band can be understood as a stepped frequency band where the frequency point is located.

Here, the first threshold may be a preset RSSI threshold.

And carrying out fine scanning based on physical cell search through the frequency points of the coarse scanning, wherein the searching is mainly carried out by adopting a three-step method. The three-step method is that a first step finds a slot header of a WCDMA signal through Primary Synchronization Channel (PSCH), a second step finds a frame header and a scrambling Code group number of the WCDMA signal through Secondary Synchronization Channel (SSCH), and a third step finds a scrambling Code number of the WCDMA signal through Common Pilot Channel (CPICH). In the three-step method search network, if any step of search is unsuccessful, the network quits, the next frequency point which passes through the coarse scanning in the given frequency band is selected, the three-step method search is restarted, and only the frequency points which are successfully searched in the three steps can become the WCDMA frequency point. The terminal starts the cell residence process at the WCDMA frequency point, and when the cell search and registration are both successful, the terminal initiates a common call.

It should be understood that in the embodiment of the present application, for example, the first threshold may be a preset RSSI threshold. RSSI is: the average value of the power of all signals (including pilot signals, data signals, adjacent cell interference signals, noise signals and the like) in the received channel. Alternatively, the first threshold may be a preset Reference Signal Receiving Power (RSRP) threshold, where the RSRP is: linear average of the power contribution (in W) of the resource elements carrying the cell-specific reference signal over the measurement band. However, the present application is not limited thereto.

It should be noted that, for a general call, the user may set the priority order of terminal domain selection.

For example, the user can set the priority order of the time domain for initiating the common call on the terminal according to the current network signal quality condition.

For emergency calls, the terminal domain selects the priority in the order specified by the protocol, i.e. the mobile communication network is higher than the WIFI network. That is, when an emergency call is initiated, the priority of the domain selection is the order specified by the protocol, and the user cannot set the priority order of the domain selection of the terminal according to the network signal quality.

Therefore, when the terminal receives the emergency call request and initiates the emergency call, the terminal needs to first perform network search and registration on the mobile communication network. If the emergency call is not successfully initiated by the mobile communication network, the terminal initiates the emergency call based on the Wifi wireless network.

According to the current process, when the terminal makes an emergency call, the terminal still adopts the first threshold to scan the frequency band in the mobile communication network. When the signal quality of the mobile communication network is poor but the access parameter of the Wifi wireless network is higher than the handover threshold, for example, the signal quality of the Wifi wireless network is good, the terminal still has to search for a network and register on the mobile communication network with poor signal quality first. When the emergency call is not successfully initiated in the mobile communication network, the emergency call can be initiated in the Wifi wireless network with better signal quality. At this time, it has taken a lot of time for the terminal to perform network search and registration in the mobile communication network.

In an embodiment of the present application, an access parameter of the Wifi wireless network is higher than a handover threshold (a wireless network access threshold), and the handover threshold may be a parameter, for example, a threshold of a Received Signal Strength Indicator (RSSI), or a threshold of a Block Error Rate (BLER), where the Block Error Rate is a percentage of an Error Block in all transmitted blocks, or a threshold of a channel utilization Rate.

Therefore, using the first threshold of frequency band scanning of the current normal call in the network searching and registering phase of the emergency call may affect the speed and quality of the voice service during the emergency call.

In the embodiment of the application, the terminal scans the frequency band energy by adopting a preset emergency call threshold, wherein the preset emergency call threshold is higher than a first threshold. Therefore, the time for searching the network and registering the emergency call is shortened, and the user experience is improved.

Hereinafter, a method of an emergency call according to an embodiment of the present application will be described in detail.

Fig. 2 is a schematic flow chart diagram of a method of emergency calling according to one embodiment of the present application. The method shown in fig. 2 is performed by a terminal, for example, may be performed by the terminal shown in fig. 1.

It should be understood that in the embodiments of the present application, "first", "second", etc. are only intended to refer to different objects, and do not indicate other limitations to the objects referred to.

It should be understood that, in the embodiment of the present application, the energy of the first frequency band may be energy at a predetermined frequency point on the first frequency band, for example, the predetermined frequency point may be a coarse scanning frequency point, and the coarse scanning frequency point is extracted according to a set step in a given frequency band, for example, the step value is 10, and when the energy at the coarse scanning frequency point 10 is greater than a preset emergency call threshold, all frequency points included in the first frequency band where the frequency points 1 to 10 are located are subjected to fine scanning. At this time, the energy of the first frequency band may be considered to be greater than a preset emergency call threshold. This is not a limitation of the present application.

S201, when the terminal acquires the emergency call request, the terminal detects a first frequency band of the mobile communication network.

For example, when the terminal receives the emergency call dialing of the user, the mobile communication network is detected according to the predetermined domain selection priority.

For example, if the terminal does not reside in the mobile communication network when the terminal acquires the emergency call request, the terminal starts to detect the mobile communication network. Alternatively, if the terminal has camped on the mobile communication network at this time, the terminal may initiate the emergency call directly on the camped mobile communication network. Or if the terminal does not successfully initiate the emergency call, the mobile communication network is detected again.

For different situations where the mobile communication network includes a CS domain and/or an IMS LTE domain, the domain selection manner for the terminal to initiate the emergency call may include, but is not limited to, the following manners:

And when the terminal does not successfully initiate the emergency call in the IMS LTE domain, the emergency call is initiated in the IMS WIFI domain.

Optionally, in this embodiment of the present application, when the terminal does not reside in the CS domain, the terminal starts a network searching and registering phase of the CS domain, for example, the terminal may acquire a first frequency band in the CS domain and detect energy of the first frequency band. The first frequency band here may be any frequency band in the CS domain.

Optionally, in this embodiment of the application, when the terminal does not reside in the IMS LTE network, the terminal starts a network searching phase of the IMS LTE domain, for example, the terminal may acquire a first frequency band in the IMS LTE domain and detect energy of the first frequency band. The first frequency band here may be any frequency band in the IMS LTE domain.

S202, the terminal judges whether the energy of the current first frequency band is larger than a preset emergency call threshold, wherein the emergency call threshold is larger than a first threshold for scanning the frequency band of the mobile communication network. If the energy of the first frequency band is greater than a preset emergency call threshold, S203 is executed.

It should be noted that the first threshold is used for the frequency band scanning of the mobile communication network during a non-emergency call. For example, the first threshold may be an RSSI threshold in a normal call, which is not limited in this application.

S203, the terminal searches the cell in the first frequency band.

Optionally, in an embodiment of the present application, for example, when the terminal is not camped on a CS network and a Wifi wireless network has a good signal quality, an emergency call is initiated, and a preset emergency call threshold based on frequency band energy scanning is greater than a scanning threshold of frequency band energy in a normal call, so as to preliminarily screen a high-quality frequency point in a first frequency band of a CS domain, and perform a physical cell search at the screened frequency point.

By improving the scanning threshold of the first frequency band in emergency call, the number of frequency points for cell search in the first frequency band is reduced, so that the network searching time of the terminal in the CS domain in emergency call is reduced, and the network searching efficiency of the terminal in the CS domain in emergency call is improved.

Optionally, in an embodiment of the present application, for example, when the terminal is not camped on the IMS LTE network and the signal quality of the Wifi wireless network is good, an emergency call is initiated, and a preset emergency call threshold based on frequency band energy scanning is greater than a scanning threshold of frequency band energy in a normal call, so as to preliminarily screen a high-quality frequency point in the first frequency band of the IMS LTE domain, and perform a search for a physical cell at the screened frequency point.

By improving the scanning threshold of the first frequency band during emergency call, the number of frequency points for cell search in the first frequency band is reduced, so that the network searching time of the terminal in the IMS LTE domain during emergency call is reduced, and the network searching efficiency of the terminal in the IMS LTE domain during emergency call is improved.

It should be noted that, in the embodiment of the present application, the preset emergency call threshold is greater than the first threshold of the frequency band energy scan of the mobile communication network, where the preset emergency call threshold may be used in the following scenarios including but not limited to:

scene one: the threshold of the CS domain emergency call may be a preset emergency call threshold, and the threshold of the IMS LTE domain emergency call may be a scanning threshold of band energy when the call is in a normal state, that is, the threshold of the IMS LTE domain emergency call may be a first threshold of band scanning.

Scene two: the threshold of the IMS LTE emergency call may be a preset emergency call threshold, and the threshold of the CS emergency call may be a scanning threshold of band energy when the call is in a normal state, that is, the threshold of the CS emergency call may be a first threshold of band scanning.

In the embodiment of the application, the preset emergency call threshold is larger than the first threshold of the mobile communication network frequency band scanning, so that the time for searching the network for the emergency call is shortened, the waiting time for the user to initiate the emergency call is reduced, and the experience of the user is improved.

S204, the terminal judges whether the first cell is successfully searched in the current first frequency band. If the terminal successfully searches the first cell in the first frequency band, S205 is executed.

Specifically, the terminal firstly performs frequency point screening in the first frequency band, and when a certain frequency point in the first frequency band is greater than a threshold of the emergency call search network, the terminal performs physical cell-based search at the frequency point.

S205, when the terminal successfully searches for the first cell in the first frequency band, the terminal initiates an emergency call in the first cell.

It should be noted that the first cell may be any one of a CS domain or an IMS LTE domain, and is not specifically limited herein.

Optionally, in an embodiment of the present application, before the terminal detects the first frequency band of the mobile communication network, the terminal may determine that the signal quality of the Wifi wireless network is greater than a predetermined threshold, for example, an access parameter of the Wifi wireless network is greater than an access threshold.

Optionally, in an embodiment of the present application, when the terminal does not successfully initiate an emergency call at all frequency points in the first frequency band that are greater than the preset emergency call threshold, the terminal continues to detect the second frequency band in the mobile communication network.

If the energy of the second frequency band is larger than a preset emergency call threshold, the terminal searches a cell in the second frequency band, wherein the emergency call threshold is larger than a first threshold for scanning the frequency band of the mobile communication network;

and when the terminal successfully searches the second cell in the second frequency band, initiating an emergency call through the second cell.

If the emergency call is not successfully initiated at all frequency points included in the second frequency band and greater than the preset emergency call threshold, the similar method is performed, and the terminal detects the third frequency band in the mobile communication network, which is not specifically limited herein.

Optionally, in an embodiment of the present application, when the terminal may initiate the emergency call preferentially in the CS domain. If the terminal does not successfully initiate the emergency call in the CS domain, the terminal initiates the emergency call in the IMS LTE domain according to the domain selection priority of the emergency call.

Optionally, in an embodiment of the present application, when the terminal may initiate the emergency call preferentially in the IMS LTE domain. If the terminal does not successfully initiate the emergency call in the IMS LTE domain, the terminal initiates the emergency call in the CS domain according to the domain selection priority of the emergency call.

Optionally, in an embodiment of the present application, when the terminal does not successfully search for a cell in all frequency bands of the mobile communication network, or when the terminal does not successfully initiate an emergency call in all frequency bands of the mobile communication network, the terminal initiates the emergency call through the Wifi wireless network.

It should be understood that the unsuccessful search of cells by the terminal in all frequency bands of the mobile communication network includes, but is not limited to, the following scenarios:

scene one: the terminal does not successfully search the cell in all frequency bands of the CS domain, namely the terminal does not successfully search the cell at a frequency point which is greater than a preset emergency call threshold and is included in each frequency band of the CS domain, such as a first frequency band, a second frequency band and the like, and then the terminal does not successfully search the cell at a frequency point which is greater than the preset emergency call threshold and is included in each frequency band of the IMS LTE domain, such as the first frequency band, the second frequency band and the like, so that the emergency call is not successfully initiated in the mobile communication network.

Scene two: the terminal does not successfully search the cell in all frequency bands of the IMS LTE domain, namely the terminal does not successfully search the cell at the frequency points which are included by the first frequency band, the second frequency band and the like of the IMS LTE domain and are larger than the preset emergency call threshold, and then the terminal does not successfully search the cell at the frequency points which are included by the first frequency band, the second frequency band and the like of the CS domain and are larger than the preset emergency call threshold, so that the emergency call is not successfully initiated in the mobile communication network.

It should be understood that the terminal has not successfully initiated an emergency call in all frequency bands of the mobile communication network including, but not limited to, the following scenarios:

scene one: the terminal can successfully search the cell at a frequency point which is greater than a preset emergency call threshold frequency point in some frequency bands of the CS domain, but the emergency call is not successfully initiated at the frequency point. The terminal may continue to detect other frequency bands in the CS domain until the terminal has not successfully initiated an emergency call on all frequency bands that the terminal can search for in the CS domain.

The terminal then successfully searches for a cell at a frequency point which is greater than a preset emergency call threshold frequency point in some frequency bands of the IMS LTE domain, but does not successfully initiate an emergency call at the frequency point. The terminal can continue to detect other frequency bands in the IMS LTE domain until the terminal fails to initiate an emergency call on all frequency bands which can be searched in the IMS LTE domain.

Therefore, the terminal has not successfully initiated an emergency call in all frequency bands of the mobile communication network.

Scene two: the terminal successfully searches a cell at a frequency point which is larger than a preset emergency call threshold frequency point in some frequency bands of an IMS LTE domain, but the emergency call initiated at the frequency point is unsuccessful. The terminal can continue to detect other frequency bands in the IMS LTE domain until the terminal unsuccessfully initiates an emergency call on all the frequency bands which can be searched in the IMS LTE domain.

The terminal can successfully search the cell at a frequency point which is greater than a preset emergency call threshold frequency point in some frequency bands of the CS domain, but the emergency call is not successfully initiated at the frequency point. The terminal may continue to detect other frequency bands in the CS domain until the terminal has not successfully initiated an emergency call on all frequency bands that the terminal can search for in the CS domain.

Optionally, in an embodiment of the present application, if the terminal successfully initiates the emergency call through the Wifi wireless network, the terminal initiates the next emergency call through the Wifi wireless network preferentially.

It should be noted that, before the terminal initiates the next emergency call through the Wifi wireless network, the terminal determines that the signal quality of the Wifi wireless network is greater than the predetermined threshold. Namely, the signal quality of the Wifi wireless network currently used for the call service is in a better condition.

In addition, the terminal and the Wifi wireless network are always kept in a connected state from the time when the terminal successfully initiates the emergency call to the time when the terminal initiates the next emergency call.

For example, if the connection between the terminal and the Wifi wireless network is interrupted before the terminal initiates the emergency call for the second time, it is necessary to acquire the first frequency band of the mobile communication network again and search for the network.

In the embodiment of the application, the Wifi wireless network which is successful in the last emergency call and is in the connection state and has better signal quality is preferentially selected, so that the time for searching the network for the emergency call is shortened, the waiting time when the user initiates the emergency call is reduced, and the experience of the user is improved.

Optionally, in an embodiment of the present application, for example, when the terminal successfully searches for the first cell in the first frequency band, the emergency call is initiated through the first cell. And when the terminal fails to call for the first time, continuing to initiate the emergency call through the first cell based on the emergency call redial timer, wherein the time length of the emergency call redial timer is less than that of the mobile communication network call redial timer.

Specifically, if the emergency call initiated through the first cell fails, the emergency call redialing timer redials the emergency call number before timeout occurs, and the emergency call is initiated again.

It should be noted that a redial timer is configured inside the terminal, and a redial duration is set in the redial timer. When the call is not initiated for the first time after dialing, if the redialing time does not exceed the set redialing time, the redialing timer can redial the calling number.

For example, if the total redial time of the redial timer preconfigured in the CS domain is 20 seconds, the redial timer may initiate the emergency call again in the CS domain within 20 seconds. After 20S, if the terminal still fails to make the emergency call, the terminal does not initiate the emergency call redial in the CS domain any more, that is, the terminal does not successfully initiate the emergency call. The terminal then prioritizes according to the domain, e.g. the terminal starts network search and registration in the IMS LTE domain.

In the embodiment of the application, the redialing time of the emergency call is shortened by setting the redialing timer of the emergency call, wherein the time length of the redialing timer of the emergency call is less than the time length of the redialing timer of the mobile communication network call, namely the time length of the redialing timer of the emergency call is less than the time length of the redialing timer of the normal call.

Fig. 3 is a schematic flow chart diagram of a method of emergency calling according to another embodiment of the present application. The method shown in fig. 3 is performed by a terminal, for example, as may be performed by the terminal shown in fig. 1.

It should be noted that, in fig. 3, the CS domain is described as having a higher priority than the IMS LTE domain, and the flow executed in fig. 3 may also be that the IMS LTE domain has a higher priority than the CS domain, which is not specifically limited herein.

S301, the terminal acquires an emergency call request.

It should be understood that the terminal may obtain the emergency call request terminal, and may select, on the terminal call interface, a number for initiating the emergency call for the user, or the user may dial the emergency number through the voice control operation terminal, which is not specifically limited in the present application.

S302, according to the domain selection priority, the CS domain priority is higher than the IMS LTE domain, so that the emergency call is initiated in the CS domain preferentially.

S303, the terminal judges whether the terminal resides in the CS domain at the moment.

If the terminal resides in the CS domain, S305 is performed. That is, the terminal satisfies the access condition of a certain cell in the CS domain, and successfully registers in the certain cell, S305 is executed. If the terminal does not reside in the CS domain, S304 is performed.

S304, the terminal searches and registers the network in the CS domain. Wherein, S304 comprises the following steps:

s3041, the terminal acquires the first frequency band in the CS domain, and performs coarse scanning detection on the energy of the first frequency band.

S3042, according to a preset emergency call threshold, detecting a frequency point on the first frequency band greater than the preset emergency call threshold, where the preset emergency call threshold is higher than the normal call threshold, that is, higher than the first threshold for scanning the frequency band of the mobile communication network, and then performing S3403.

It should be noted that, in the embodiment of the present application, the first threshold may be an RSSI threshold in a normal call. This is not a limitation of the present application.

S3043, performing a fine frequency point scan based on physical cell search at a frequency point greater than a preset emergency call threshold.

S3044, determining whether the cell search and registration performed at the frequency point greater than the preset emergency call threshold is successful. If the terminal succeeds in cell search and registration at the frequency point, S305 is performed. If the terminal does not succeed in cell search and registration at the frequency point, S3041 is performed.

S305, the terminal initiates an emergency call in the CS domain.

Optionally, the terminal resides in the CS domain before the terminal initiates the emergency call in the CS domain.

Optionally, before the terminal initiates the emergency call in the CS domain, the terminal successfully searches and registers the cell at the frequency point where the first frequency band is greater than the preset emergency call.

S306, the terminal judges whether the CS domain emergency call is successful.

If the terminal successfully initiates the emergency call, S307 is executed. If the terminal does not successfully initiate the emergency call in the CS domain, the process returns to continue to S304.

It should be understood that if the terminal does not successfully make the emergency call in the CS domain, the terminal continues to detect the second frequency band in the CS domain to perform the above-mentioned S3044, S3044 and S3044. If the terminal still fails to initiate the emergency call in the second frequency band, the terminal executes the similar process, and the terminal detects the third frequency band in the CS domain, which is not specifically limited in the embodiment of the present application.

S307, the emergency call is successfully initiated through the CS domain, i.e. the emergency call process is ended.

And executing S308 when the terminal searches for the network in the CS domain and the registration is finished.

S308, the terminal judges whether the CS domain emergency call is successful.

If the CS domain emergency call is not successful, S309 is performed.

It should be noted that the emergency call of the terminal in the CS domain has not succeeded, but includes, but is not limited to, the following two ways:

the first method is as follows: all frequency bands, such as the first frequency band, the second frequency band, and so on, of the CS domain of the terminal are not successfully searched or successfully registered to the cell.

The second method comprises the following steps: the terminal may not successfully initiate an emergency call in all frequency bands of the CS domain, for example, the first frequency band, the second frequency band, and so on.

Prior to performing 309, the emergency call flow further comprises the following steps according to the domain prioritization of the emergency call:

when the terminal does not successfully initiate the emergency call in the CS domain, the terminal then initiates the emergency call over the IMS LTE domain according to the domain prioritization for the emergency call.

It should be noted that the procedure of the terminal initiating the emergency call in the IMS LTE domain is similar to the procedure of initiating the emergency call in the CS domain, that is, the step S303 is executed to determine whether the terminal is already resident in the IMS LTE domain.

If the terminal is already resident in the IMS LTE domain, S305 is executed to initiate an emergency call on the IMS LTE domain. If not, executing S304 to search network and register in IMS LTE domain. Wherein, S304 comprises the following steps:

s3041, the terminal acquires the first frequency band in the IMS LTE domain, and performs coarse scanning detection on the energy of the first frequency band.

S3042, according to the preset emergency call threshold, detecting a frequency point on the first frequency band greater than the preset emergency call threshold, and executing S3043.

S3043, performing a frequency point fine scan based on physical cell search on the frequency points greater than the preset emergency call threshold.

S3044, determining whether the cell search and registration is successful at the frequency point greater than the preset emergency call threshold. If the cell search and registration are successful, S305 is performed. If the cell search and registration are not successful, S3041 is performed.

S305, the terminal initiates an emergency call in an IMS LTE domain.

Optionally, before the terminal initiates the emergency call in the IMS LTE domain, the terminal already resides in the IMS LTE domain, or the terminal successfully searches and registers the cell at the frequency point where the first frequency band is greater than the preset emergency call.

S306, the terminal judges whether the IMS LTE domain emergency call is successful. If the terminal succeeds in the emergency call, S307 is executed. If the terminal does not successfully call in the IMS LTE domain, the process returns to continue to execute S304.

It should be understood that, here, if the terminal does not successfully perform the emergency call in the IMS LTE domain, the terminal continues to detect the second frequency band in the IMS LTE domain to perform the above S3044, S3044 and S3044. If the terminal still does not successfully initiate the emergency call in the second frequency band, the terminal executes the similar process, and the terminal detects the third frequency band in the IMS LTE domain, which is not specifically limited in the embodiment of the present application.

S307, the emergency call is successfully initiated through the IMS LTE domain, namely the emergency call process is finished.

And executing S308 after the terminal searches for the network in the IMS LTE domain and the registration is finished.

S308, the terminal judges whether the IMS LTE domain emergency call is successful. If the IMS LTE domain emergency call is not successful, S309 is performed.

It should be noted that the emergency call of the terminal in the IMS LTE domain has not been successful, but includes the following two modes:

the first method is as follows: the terminal does not successfully search or successfully register to the cell in all frequency bands of the IMS LTE domain, for example, the first frequency band, the second frequency band, and so on.

The second method comprises the following steps: the terminal does not successfully initiate an emergency call in all frequency bands of the IMS LTE domain, for example, the first frequency band, the second frequency band, and so on.

S309, initiating an emergency call voice call service based on the Wifi wireless network, namely VoWifi.

It should be noted that there is a certain difference between the Wifi wireless network used for the voice call service and the ordinary Wifi wireless network. The Wifi wireless network for voice call service needs to send a common Wifi wireless network to a core after performing operations such as identity verification, authentication, encryption protection and the like on the Wifi wireless network through a special server.

S310, the terminal judges whether the emergency call voice service is initiated successfully based on the Wifi wireless network. If the terminal successfully initiates the emergency call voice service based on the Wifi wireless network, S311 is executed. If the terminal does not successfully initiate the emergency call voice service based on the Wifi wireless network, S312 is executed.

S311, the emergency call voice service is successfully initiated based on the Wifi wireless network, namely the emergency call process is finished.

S312, network searching and registering in the CS domain based on a first threshold (where the first threshold is a threshold during a normal call, for example, the first threshold may be an RSSI threshold during a normal call), where S312 includes the following steps:

s3121, the terminal acquires the first frequency band in the CS domain, and performs coarse scanning detection on the energy of the first frequency band.

And S3122, according to the first threshold, detecting a frequency point on the first frequency band which is larger than a preset emergency call threshold, and executing S3123.

And S3123, performing frequency point fine scanning based on physical cell search on the frequency points larger than the first threshold.

And S3124, judging whether the cell searching and registering are successful at the frequency point greater than the first threshold. If the cell search and registration are successful, S305 is performed. If the cell search and registration are not successful, S3121 is performed.

It should be noted that the threshold in S3042 is a preset emergency call threshold, which may be understood as a specific threshold for an emergency call, and the threshold is higher than the first threshold in S3123. The first threshold may be understood as a threshold in a normal call, for example, the first threshold may be an RSSI threshold in a normal call. The preset emergency call threshold is higher than the first threshold of the ordinary call, so that the frequency points of high-quality signals can be preliminarily screened out, the frequency band frequency point number of the search network is reduced, and the time of searching the network for the emergency call is shortened.

Optionally, in an embodiment of the present application, S302 may be that the IMS LTE domain has a higher priority than the CS domain. I.e. the above procedure is first performed in the IMS LTE domain.

Optionally, in an embodiment of the present application, a preset emergency call threshold may be used for network search and registration in the CS domain, and a preset emergency call threshold may also be used for network search and registration in the IMS LTE domain.

Optionally, in an embodiment of the present application, a preset emergency call threshold may be used for network search and registration in the CS domain, and a first threshold for a normal call may be used for network search and registration in the IMS LTE domain.

Optionally, in an embodiment of the present application, a first threshold for a normal call may be used for network search and registration in the CS domain, and a preset emergency call threshold may be used for network search and registration in the IMS LTE domain.

It should be understood that when the signal quality of the Wifi wireless network is greater than the predetermined threshold, i.e., the signal quality of the Wifi wireless network is better. The Wifi wireless network can be used for voice call service, and the common Wifi wireless network needs to be sent to a core after the operations such as identity verification, authentication, encryption protection and the like are carried out on the common Wifi wireless network through a special server. At the moment, the network searching and registering are carried out by adopting the preset emergency call threshold, the frequency points of high-quality signals can be preliminarily screened out, the frequency band frequency point quantity of the mobile communication network searching network is reduced, and if the mobile communication network does not successfully initiate the emergency call, the emergency call voice conversation service can be rapidly initiated through the Wifi wireless network. Therefore, the waiting time of the user in the emergency call is reduced, and the user experience is provided.

Fig. 4 is a schematic flow chart diagram of a method of emergency calling according to another embodiment of the present application. The method shown in fig. 4 is performed by a terminal, for example, may be performed by the terminal shown in fig. 1.

It should be noted that S402 in fig. 4 shows that the CS domain initiates an emergency call, and may also be used for the IMS LTE domain to initiate an emergency call, and may also be S305 in fig. 3.

S401, the terminal judges whether the cell search and the registration are successful. If the terminal has succeeded in cell search and registration at this time, S402 is performed.

S402, the terminal initiates an emergency call in the CS domain. Wherein, S402 comprises the following steps:

s4021, the terminal judges whether the first call fails. If the first call fails, S4022 is executed.

It should be understood that the failure of the terminal to make a call for the first time does not mean that the terminal has not successfully made an emergency call, and the successful making of the emergency call displayed on the terminal interface may be the final successful making of the emergency call after several times of making of the emergency calls based on a redial timer configured inside the terminal.

S4022, when the terminal searches and registers the cell successfully, for example, when the terminal searches the first cell successfully, the terminal initiates an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than the duration of the mobile communication network call redial timer.

In the embodiment of the present application, for example, the duration of the mobile communication network call redial timer is 10 seconds, that is, if the terminal fails to initiate a call within 10 seconds, the redial timer will automatically redial the number to initiate a call again. If it exceeds 10 seconds, the redial timer will stop initiating the call again in the mobile communication network. The time length of the emergency call redialing timer can be set to be 5 seconds, and if the emergency call fails within 5 seconds, the emergency call redialing timer can automatically redial the number to initiate the call again. If it exceeds 5 seconds, the emergency call redial timer will stop initiating the emergency call again in the mobile communication network. Therefore, the waiting time of the emergency call is reduced, and the experience of the user is improved.

It should be noted that the redial duration of the redial timer may be preset in the terminal in advance, for example, the redial duration is set to 30 seconds. The number of redials is determined by the network environment of the terminal and the received signaling.

For example, if the network in which the terminal is located has not responded, the time interval for the terminal to initiate a call may be shortened, i.e., the number of redials initiated by the terminal is increased.

S4023, the terminal redials the emergency call.

Specifically, emergency call redial may be performed before the emergency call redial timer times out. For example, before the emergency call redial timer exceeds the set redial duration, the emergency call redial timer may automatically redial a number and initiate an emergency call again.

Fig. 5 is a schematic flow chart diagram of a method of emergency calling according to another embodiment of the present application. The method shown in fig. 5 is performed by a terminal, for example, may be performed by the terminal shown in fig. 1.

S501, the user UE dials an emergency number on the terminal.

It should be understood that dialing the emergency number by the terminal may be a number selected by the user to initiate an emergency call on the terminal call interface, or the user may dial the emergency number by operating the terminal through voice control, which is not specifically limited in this application.

S502, the terminal judges whether the currently connected Wifi wireless network and the Wifi wireless network which successfully initiates the emergency call voice service last time are the same registered Wifi wireless network.

And if the currently connected Wifi wireless network and the Wifi wireless network which successfully initiates the emergency call voice service last time are the same registered Wifi wireless network, executing S503.

If the currently connected Wifi wireless network is not the same Wifi wireless network registered at the same time as the Wifi wireless network that successfully initiated the emergency call voice service at the last time, S504 is executed.

S503, the terminal judges whether the Wifi wireless network which is registered at the same time can be used for the emergency call voice service.

If the Wifi wireless network can be used for the emergency call voice service, S505 is executed. If the Wifi wireless network cannot be used for the emergency call voice service, S504 is executed.

S504, the original emergency call process may be the emergency call process described in fig. 3 that uses the preset emergency call threshold, or may also be an emergency call process similar to fig. 3 that uses a normal call threshold, and the present application is not limited in this respect.

And S505, the terminal directly initiates a second emergency call voice service from the Wifi wireless network which is registered at the same time and successfully initiates the emergency call voice service last time.

S506, the terminal judges whether the emergency call voice service is successful.

If successful, go to S507. If not, go to S504.

S507, the terminal successfully initiates the emergency call voice service based on the Wifi wireless network, namely the emergency call process is finished.

Optionally, in an embodiment of the present application, the terminal determines that the signal quality of the Wifi wireless network is greater than a predetermined threshold, that is, in a case that the signal quality of the Wifi wireless network is better. The terminal determines that the first emergency call is successfully initiated through the Wifi wireless network, and the terminal and the Wifi wireless network are always in a connected state from the time when the terminal successfully initiates the first emergency call to the time when the terminal initiates the second emergency call, so that the terminal can initiate the second emergency call through the Wifi wireless network.

It should be noted that the Wifi wireless network may be used for a voice call service, and the Wifi wireless network is sent to the core after the common Wifi wireless network is subjected to operations such as identity verification, authentication, encryption protection and the like through a proprietary server.

In the embodiment of the application, the Wifi wireless network which is always connected with the terminal and successfully initiates the emergency call voice service last time initiates the emergency call for the Wifi wireless network which is registered at the same time, so that the time of searching the network for the emergency call is reduced, and the experience of a user is provided.

It should be understood that various embodiments of the present application can be implemented individually or in combination, and the embodiments of the present application are not limited thereto.

It should be understood that the specific examples in the embodiments of the present application are for the purpose of promoting a better understanding of the embodiments of the present application and are not intended to limit the scope of the embodiments of the present application.

It should be understood that, in the various embodiments of the present application, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

The method for making an emergency call by using the preset emergency call threshold, the emergency call redial timer, and the Wifi wireless network which is registered at the same time and successfully initiates the emergency call is described in detail above. A terminal according to an embodiment of the present application will be described below. It should be understood that the terminal of the embodiment of the present application may execute the foregoing methods of the embodiment of the present application, that is, the following specific working processes of various products, and reference may be made to the corresponding processes in the foregoing method embodiments.

Fig. 6 is a schematic block diagram of a terminal according to one embodiment of the present application. As shown in fig. 6, the terminal 600 includes: a processing unit 610 and a communication unit 620.

The processing unit 610 and the communication unit 620 communicate with each other via internal connection paths, passing control and/or data signals. In one possible design, the processing unit 610 and the communication unit 620 may be implemented by chips to realize the corresponding functions of the terminal in the embodiment of the present application.

In an embodiment of the present application, the processing unit 610 is configured to:

for obtaining an emergency call request.

The processing unit 610 is also configured to,

a first frequency band of a mobile communication network is detected.

If the energy of the first frequency band is greater than a preset emergency call threshold, the processing unit 610 is further configured to perform cell search in the first frequency band, where the emergency call threshold is greater than a first threshold for mobile communication network frequency band scanning.

The communication unit 620 is configured to:

and when the first cell is successfully searched in the first frequency band, initiating an emergency call through the first cell.

Optionally, before the terminal detects the first frequency band of the mobile communication network, the processing unit 610 is further configured to:

Optionally, the first threshold is used for frequency band scanning of the mobile communication network in a non-emergency call.

Optionally, the processing unit 610 is further configured to:

and when the cell is not successfully searched in the first frequency band, or when the emergency call is not successfully initiated in the first frequency band, detecting a second frequency band of the mobile communication network.

Optionally, the communication unit 620 is further configured to:

and when the cells are not successfully searched in all frequency bands of the mobile communication network, or when the emergency call is not successfully initiated in all frequency bands of the mobile communication network, initiating the emergency call through the Wifi wireless network.

Optionally, the communication unit 620 is further configured to:

and if the terminal successfully initiates the emergency call through the Wifi wireless network, initiating the next emergency call through the Wifi wireless network.

Optionally, before the terminal initiates the next emergency call through the Wifi wireless network, the processing unit 610 is further configured to:

Optionally, the terminal and the Wifi wireless network are always kept in a connected state from the time when the terminal successfully initiates the emergency call to the time when the terminal initiates the next emergency call.

Optionally, before the terminal detects the first frequency band of the mobile communication network, the terminal does not camp on the mobile communication network.

Optionally, before the terminal detects the first frequency band of the mobile communication network, the terminal resides in a second cell of the mobile communication network, and the terminal does not successfully initiate an emergency call in the second cell.

Optionally, the communication unit 620 is further configured to:

Optionally, the processing unit 610 is further configured to:

In one embodiment of the present application, the processing unit 610 is configured to:

a cell search is performed in the mobile communication network.

The communication unit 620 is configured to:

when the mobile communication network successfully searches a first cell, a processing unit initiates an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than that of the mobile communication network call redial timer.

Optionally, the processing unit 610 is further configured to:

and determining that the terminal successfully initiates the first emergency call through the Wifi wireless network.

The communication unit 620 is configured to:

and when the terminal successfully initiates the first emergency call and the terminal initiates a second emergency call, the terminal and the Wifi wireless network are always in a connected state, and the second emergency call is initiated through the Wifi wireless network.

Optionally, the processing unit 610 is further configured to:

Fig. 7 is another schematic block diagram of a terminal according to an embodiment of the present application. The terminal 700 shown in fig. 7 includes: radio Frequency (RF) circuitry 710, memory 720, other input devices 730, display 740, sensors 750, audio circuitry 760, I/O subsystem 770, processor 780, and power supply 790. Those skilled in the art will appreciate that the terminal structure shown in fig. 7 is not intended to be limiting and may include more or fewer components than those shown, or may combine certain components, or split certain components, or arranged in different components. Those skilled in the art will appreciate that the display 740 is part of a User Interface (UI) and that the terminal 700 may include fewer than or the same User Interface as illustrated.

The various components of terminal 700 are described in detail below with reference to fig. 7:

the RF circuit 710 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, receives downlink information of a base station and then processes the received downlink information to the processor 780; in addition, the data for designing uplink is transmitted to the base station. Typically, the RF circuitry includes, but is not limited to, an antenna, at least one Amplifier, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuit 710 may also communicate with networks and other devices via wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communication (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Messaging Service (SMS), and the like.

The memory 720 may be used to store software programs and modules, and the processor 780 performs various functional applications and data processing of the terminal 700 by operating the software programs and modules stored in the memory 720. The memory 720 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the terminal 700, and the like. Further, the memory 720 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.

Other input devices 730 may be used for receiving input numeric or character information and generating key signal inputs related to user settings and function control of terminal 700. In particular, other input devices 730 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, a light mouse (a light mouse is a touch-sensitive surface that does not display visual output, or is an extension of a touch-sensitive surface formed by a touch screen), and the like. Other input devices 730 are connected to other input device controllers 771 of the I/O subsystem 770 and interact with the processor 780 via signals under the control of the other device input controllers 771.

Display 740 may be used to display information entered by or provided to the user and various menus of terminal 700, and may also accept user input. The display 740 may include a display panel 741 and a touch panel 742. The Display panel 741 may be configured by a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), and the like. Touch panel 742, also referred to as a touch screen, a touch sensitive screen, etc., may collect contact or non-contact operations (e.g., operations performed by a user on or near touch panel 742 using any suitable object or accessory such as a finger or a stylus, and may also include body-sensing operations; including single-point control operations, multi-point control operations, etc.) and drive corresponding connection devices according to a predetermined program. Alternatively, the touch panel 742 may include two parts, a touch detection device and a touch controller. The touch detection device detects the touch direction and gesture of a user, detects signals brought by touch operation and transmits the signals to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into information that can be processed by the processor, sends the information to the processor 780, and receives and executes commands from the processor 780. In addition, the touch panel 742 can be implemented by various types, such as resistive, capacitive, infrared, and surface acoustic wave, and the touch panel 742 can also be implemented by any technology developed in the future. Further, touch panel 742 can overlay display panel 741, a user can operate on or near touch panel 742 overlaid on display panel 741 according to content displayed on display panel 741 (the display content including, but not limited to, a soft keyboard, a virtual mouse, virtual keys, icons, etc.), touch panel 742 detects the operation on or near touch panel 742, and transmits the detected operation to processor 780 through I/O subsystem 770 to determine a user input, and processor 780 then provides a corresponding visual output on display panel 741 through I/O subsystem 770 according to the user input. Although in fig. 7, the touch panel 742 and the display panel 741 are two separate components to implement the input and output functions of the terminal 700, in some embodiments, the touch panel 742 and the display panel 741 may be integrated to implement the input and output functions of the terminal 700.

The terminal 700 can also include at least one sensor 750, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 741 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 741 and/or a backlight when the terminal 700 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured in the terminal 700, detailed descriptions thereof are omitted.

Audio circuitry 760, speaker 761, and microphone 762 may provide an audio interface between a user and terminal 700. The audio circuit 760 can transmit the converted signal of the received audio data to the speaker 761, and the converted signal is converted into a sound signal by the speaker 761 and output; on the other hand, the microphone 762 converts collected sound signals into signals, which are received by the audio circuit 760 and converted into audio data, which are output to the RF circuit 710 for transmission to, for example, another cell phone, or to the memory 720 for further processing.

The I/O subsystem 770 may be used to control input and output for external devices, including other devices, input controllers 771, sensor controllers 772, and display controllers 773. Optionally, one or more other input control device controllers 771 receive signals from and/or send signals to other input devices 730, and other input devices 730 may include physical buttons (push buttons, rocker buttons, etc.), dials, slide switches, joysticks, click wheels, light mice (a light mouse is a touch-sensitive surface that does not display visual output, or is an extension of a touch-sensitive surface formed by a touch screen). It is noted that other input control device controllers 771 may be connected to any one or more of the devices described above. Display controller 773 in the I/O subsystem 770 receives signals from display 740 and/or sends signals to display 740. After the display screen 740 detects the user input, the display controller 773 converts the detected user input into interaction with the user interface object displayed on the display screen 740, i.e., human-computer interaction is implemented. Sensor controller 772 may receive signals from one or more sensors 750 and/or transmit signals to one or more sensors 750.

The processor 780 is a control center of the terminal 700, connects various parts of the entire terminal using various interfaces and lines, performs various functions of the terminal 700 and processes data by operating or executing software programs and/or modules stored in the memory 720 and calling data stored in the memory 720, thereby monitoring the entire terminal. Optionally, processor 780 may include one or more processing units; alternatively, processor 780 may integrate an application processor that handles primarily the operating system, user interface, applications, etc. and a modem processor that handles primarily wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 780.

In one embodiment of the present application, processor 780 is configured to: the first frequency band detection module is used for acquiring an emergency call request and detecting a first frequency band of a mobile communication network; and if the energy of the first frequency band is greater than a preset emergency call threshold, the processor performs cell search in the first frequency band, wherein the emergency call threshold is greater than a first threshold for mobile communication network frequency band scanning. And when the first cell is successfully searched in the first frequency band, initiating an emergency call through the first cell.

It is to be appreciated that in the embodiments of the present application, the processor 780 is capable of performing the functions of the processing unit 610 and the communication unit 620 in fig. 6.

Optionally, before the terminal detects the first frequency band of the mobile communication network, the processor 780 is further configured to:

Optionally, the processor 780 is further configured to:

and when the cell is not successfully searched in the first frequency band or the emergency call is not successfully initiated in the first frequency band, the terminal detects a second frequency band of the mobile communication network.

Optionally, the processor 780 is further configured to:

when the cells are not successfully searched in all frequency bands of the mobile communication network, or when the emergency call is not successfully initiated in all frequency bands of the mobile communication network, the processor initiates the emergency call through the Wifi wireless network.

Optionally, the processor 780 is further configured to:

and if the processor successfully initiates the emergency call through the Wifi wireless network, the processor initiates the next emergency call through the Wifi wireless network.

Optionally, before the terminal initiates the next emergency call through the Wifi wireless network, the processor 780 is further configured to:

Optionally, the processor 780 is further configured to:

In one embodiment of the present application, processor 780 is configured to:

a cell search is performed in the mobile communication network.

When the terminal successfully searches for a first cell in the mobile communication network, the processor 780 is configured to initiate an emergency call through the first cell based on an emergency call redial timer, where a duration of the emergency call redial timer is less than a duration of the mobile communication network call redial timer.

Optionally, the initiating an emergency call through the first cell based on the emergency call redial timer includes:

In one embodiment of the present application, processor 780 is configured to:

Optionally, the processor 780 is further configured to:

Terminal 700 also includes a power supply 790 (e.g., a battery) for powering the various components, which may optionally be logically coupled to processor 780 via a power management system that may be used to manage charging, discharging, and power consumption.

Although not shown, the terminal 700 may further include a camera, a bluetooth module, etc., which will not be described herein.

It should be understood that the terminal 700 may correspond to a terminal in the emergency call method according to an embodiment of the present application, and the terminal 700 may include an entity unit for performing the method performed by the terminal or the electronic device in the method. Moreover, each entity unit and the other operations and/or functions in the terminal 700 are respectively corresponding to the flows of the method, and are not described herein again for brevity.

It is also to be understood that the terminal 700 may comprise entity elements in a method for performing the above-described emergency call. Moreover, each entity unit and the other operations and/or functions in the terminal 700 are respectively corresponding to the flows of the method, and are not described herein again for brevity.

Embodiments of the present application also provide a computer-readable storage medium storing one or more programs, the one or more programs comprising instructions, which when executed by a portable electronic device comprising a plurality of application programs, enable the portable electronic device to perform the method of some or all of the illustrated embodiments of fig. 2, 3, 4 and 5.

The instructions, when executed by the terminal, cause the terminal to perform the steps of:

in one embodiment of the application, a terminal acquires an emergency call request;

the terminal detects a first frequency band of a mobile communication network;

if the energy of the first frequency band is larger than a preset emergency call threshold, the terminal searches a cell in the first frequency band, wherein the emergency call threshold is larger than a first threshold for scanning a mobile communication network frequency band;

and when the terminal successfully searches the first cell in the first frequency band, initiating an emergency call through the first cell.

Optionally, before the terminal detects the first frequency band of the mobile communication network, the instructions further include: and the terminal determines that the signal quality of the Wifi wireless network is greater than a preset threshold.

Optionally, the instructions further comprise:

and when the terminal does not successfully search the cell in the first frequency band, or when the terminal does not successfully initiate the emergency call in the first frequency band, the terminal detects a second frequency band of the mobile communication network.

Optionally, the instructions further comprise:

and when the terminal does not successfully search the cells in all frequency bands of the mobile communication network, or the terminal does not successfully initiate the emergency call in all frequency bands of the mobile communication network, the terminal initiates the emergency call through the Wifi wireless network.

Optionally, the instructions further comprise:

and if the terminal successfully initiates the emergency call through the Wifi wireless network, the terminal initiates the next emergency call through the Wifi wireless network.

Optionally, before the terminal initiates a next emergency call through the Wifi wireless network, the instruction further includes:

and the terminal determines that the signal quality of the Wifi wireless network is greater than a preset threshold.

Optionally, the initiating an emergency call through the first cell includes:

In one embodiment of the application, the instructions, when executed by the terminal, cause the terminal to perform the steps of:

the terminal searches the cell in the mobile communication network;

when the mobile communication network successfully searches a first cell, the terminal initiates an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than that of the mobile communication network call redial timer.

the terminal determines that a first emergency call is successfully initiated through a Wifi wireless network;

Optionally, the instructions further comprise:

It should also be understood that the processor in fig. 7 in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, or discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software in the decoding processor. The software may be in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.

It will also be appreciated that the memory in the embodiments of the subject application can be either volatile memory or nonvolatile memory, or can include both volatile and nonvolatile memory. The non-volatile Memory may be a Read-Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an Electrically Erasable PROM (EEPROM), or a flash Memory. Volatile Memory can be Random Access Memory (RAM), which acts as external cache Memory. By way of example, but not limitation, many forms of RAM are available, such as Static random access memory (Static RAM, SRAM), Dynamic Random Access Memory (DRAM), Synchronous Dynamic random access memory (Synchronous DRAM, SDRAM), Double Data Rate Synchronous Dynamic random access memory (DDR SDRAM), Enhanced Synchronous SDRAM (ESDRAM), Synchronous link SDRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

It will also be appreciated that the bus system may include a power bus, a control bus, a status signal bus, etc., in addition to the data bus. For clarity of illustration, however, the various buses are labeled as a bus system in the figures.

It should also be understood that in the present embodiment, "B corresponding to a" means that B is associated with a, from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information. It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously 10, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The steps of the method for transmitting an uplink signal disclosed in the embodiments of the present application may be directly implemented by a hardware processor, or implemented by a combination of hardware and software in the processor. The software may be in ram, flash, rom, prom, or eprom, registers, among other storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.

Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.

The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application or portions thereof that substantially contribute to the prior art may be embodied in the form of a software product stored in a storage medium and including instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A method of emergency calling, comprising:

a terminal acquires an emergency call request;

the terminal detects a first frequency band of a mobile communication network;

2. The method of claim 1, wherein before the terminal detects the first frequency band of the mobile communication network, the method further comprises:

3. The method of claim 1, wherein the first threshold is used for frequency band scanning of the mobile communication network during non-emergency calls.

4. The method of claim 1, further comprising:

5. The method of claim 1, further comprising:

when the terminal does not successfully search the cells in all frequency bands of the mobile communication network, or the terminal does not successfully initiate the emergency call in all frequency bands of the mobile communication network, the terminal initiates the emergency call through a Wifi wireless network.

6. The method of claim 5, further comprising:

7. The method as claimed in claim 6, wherein before the terminal initiates the next emergency call through the Wifi wireless network, the method further comprises:

8. The method as claimed in claim 6 or 7, wherein the terminal and the Wifi wireless network are kept connected from the time when the terminal successfully initiates the emergency call to the time when the terminal initiates the next emergency call.

9. The method according to any of claims 1 to 7, wherein the terminal is not camped on the mobile communication network before the terminal detects the first frequency band of the mobile communication network.

10. The method according to any of claims 1 to 7, wherein before the terminal detects the first frequency band of the mobile communication network, the terminal camps on a second cell of the mobile communication network, and the terminal does not successfully initiate the emergency call in the second cell.

11. The method according to any of claims 1-7, wherein said initiating an emergency call through said first cell comprises:

the terminal initiates an emergency call through the first cell based on an emergency call redial timer, wherein the duration of the emergency call redial timer is less than the duration of a mobile communication network call redial timer.

12. The method of claim 11, wherein initiating an emergency call through the first cell based on the emergency call redial timer comprises:

13. A terminal, comprising:

a radio frequency circuit;

one or more processors;

a memory;

a plurality of application programs;

and one or more computer programs, wherein the one or more computer programs are stored in the memory, the one or more computer programs comprising instructions which, when executed by the terminal, cause the terminal to perform the steps of:

acquiring an emergency call request;

detecting a first frequency band of a mobile communication network;

if the energy of the first frequency band is larger than a preset emergency call threshold, carrying out cell search in the first frequency band, wherein the emergency call threshold is larger than a first threshold for scanning the frequency band of the mobile communication network;

14. The terminal of claim 13, wherein before the terminal detects the first frequency band of the mobile communication network, the instructions further comprise:

15. The terminal of claim 13, wherein the first threshold is used for frequency band scanning of the mobile communication network during non-emergency calls.

16. The terminal of claim 13, wherein the instructions further comprise:

17. The terminal of claim 13, wherein the instructions further comprise:

and when the cells are not successfully searched in all frequency bands of the mobile communication network, or when the emergency call is not successfully initiated in all frequency bands of the mobile communication network, initiating the emergency call through a Wifi wireless network.

18. The terminal of claim 17, wherein the instructions further comprise:

and if the emergency call is successfully initiated through the Wifi wireless network, initiating the next emergency call through the Wifi wireless network.

19. The terminal of claim 18, wherein the instructions further comprise, before the terminal initiates a next emergency call over the Wifi wireless network:

20. The terminal according to claim 18 or 19, wherein the terminal maintains a connection state with the Wifi wireless network from the time when the terminal successfully originates the emergency call to the time when the terminal originates the next emergency call.

21. The terminal according to any of claims 13 to 19, wherein the terminal is not camped on the mobile communication network before the detection of the first frequency band of the mobile communication network.

22. The terminal according to any of claims 13 to 19, wherein before detecting the first frequency band of the mobile communication network, the terminal is camped on a second cell of the mobile communication network, and the terminal has not successfully originated an emergency call in the second cell.

23. The terminal according to any of claims 13 to 19, wherein said initiating an emergency call via said first cell comprises:

24. The terminal of claim 23, wherein the initiating an emergency call through the first cell based on the emergency call redial timer comprises:

25. A terminal, characterized in that the terminal comprises:

a processing unit for obtaining an emergency call request;

the processing unit is further configured to detect a first frequency band of the mobile communication network;

if the energy of the first frequency band is greater than a preset emergency call threshold, the processing unit is further configured to perform cell search in the first frequency band, where the emergency call threshold is greater than a first threshold for mobile communication network frequency band scanning;

and the communication unit is used for initiating an emergency call through the first cell when the first cell is successfully searched in the first frequency band.

26. The terminal of claim 25, wherein before the terminal detects the first frequency band of the mobile communication network, the processing unit is further configured to:

27. The terminal of claim 25, wherein the first threshold is used for frequency band scanning of the mobile communication network during non-emergency calls.

28. The terminal of claim 25, wherein the processing unit is further configured to:

29. The terminal of claim 25, wherein the communication unit is further configured to:

30. The terminal of claim 29, wherein the communication unit is further configured to:

31. The terminal of claim 30, wherein before the terminal initiates the next emergency call through the Wifi wireless network, the processing unit is further configured to:

32. The terminal of claim 30, wherein the terminal remains connected to the Wifi wireless network from the time the terminal successfully initiates the emergency call to the time the terminal initiates the next emergency call.

33. The terminal according to any of claims 25 to 32, wherein the terminal is not camped on the mobile communication network before the terminal detects the first frequency band of the mobile communication network.

34. The terminal according to any of claims 25 to 32, wherein before the terminal detects the first frequency band of the mobile communication network, the terminal is camped on a second cell of the mobile communication network, and the terminal has not successfully initiated the emergency call in the second cell.

35. The terminal according to any of claims 25 to 32, wherein the communication unit is further configured to:

36. The terminal according to any of claims 25 to 32, wherein the processing unit is further configured to: