CN111277990A - VoLTE-based emergency call method, system, terminal, device and storage medium - Google Patents
VoLTE-based emergency call method, system, terminal, device and storage medium Download PDFInfo
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- CN111277990A CN111277990A CN202010105357.1A CN202010105357A CN111277990A CN 111277990 A CN111277990 A CN 111277990A CN 202010105357 A CN202010105357 A CN 202010105357A CN 111277990 A CN111277990 A CN 111277990A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/80—Responding to QoS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/50—Connection management for emergency connections
Abstract
The invention discloses a method, a system, a terminal, equipment and a storage medium for emergency call based on VoLTE, wherein the method comprises the step of executing second VoLTE emergency call after the first VoLTE emergency call is successful; the step of again VoLTE emergency call comprises the steps of: initiating a first emergency call; judging whether the first emergency call is successful, if not, executing the following steps: establishing an emergency default bearer QCI 5; carrying out emergency registration; a second emergency call is initiated. The invention realizes that when the IMS terminal initiates the emergency call again and fails, the failure can be identified to be caused by the loss of the emergency default bearer QCI5 successfully established for the first VoLTE emergency call, thereby avoiding the problem that the IMS terminal abandons the current call because the IMS terminal directly considers the bearer loss caused by network abnormality in the prior art and effectively improving the success rate of the VoLTE network emergency call.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, a system, a terminal, a device, and a storage medium for an emergency call based on VoLTE (Voice over Long term evolution).
Background
When a user initiates a VoLTE emergency call to a network through an IMS (IP Multimedia system) terminal (terminal for short), the following three steps are required: first, establishing an emergency default bearer QCI5(QoS class identifier5, a scalar value); secondly, performing emergency registration; and thirdly, initiating an emergency call. By default, the emergency default bearer QCI5 is always active, i.e. always exists, after being successfully established, and is used for carrying emergency registration and call related SIP (error code) signaling. In a real network environment, some network operators deactivate the emergency default bearer QCI5 after the emergency call is completed based on their resource scheduling policies, and release resources corresponding to the bearer, which may cause a failure of a VoLTE emergency call subsequently initiated to the network by a user through an IMS terminal due to the loss of the default bearer QCI5, thereby reducing the success rate of the emergency call.
The real network environment includes two ways of deactivating the emergency default bearer QCI5, way 1: the network sends DEACTIVATE EPS BEARER context request (EPS (Evolved Packet System) deactivation request) signaling in Non-Access Stratum (NAS) signaling to the terminal, and explicitly deactivates the signaling; mode 2: the network side releases the corresponding bearer, and does not inform the terminal that the bearer is released, so the terminal considers that the bearer can still be used, and the terminal can only discover that the bearer is lost when initiating a new emergency call, resulting in call failure. For mode 1, since the terminal knows that the corresponding bearer has been released, the terminal will again create the emergency default bearer QCI5 before initiating the emergency call, and eventually the call is successful. However, for the method 2, since the terminal does not know that the corresponding bearer has been released, the terminal still assumes that the default bearer is in the activated state, so the terminal directly initiates an emergency call flow, and finally the call fails.
In the existing emergency call implementation process of the VoLTE network, when the VoLTE emergency call fails due to bearer loss, the terminal considers that there is a network anomaly and abandons the current call, thereby resulting in a low success rate of the emergency call.
Disclosure of Invention
The invention aims to overcome the defects that the success rate of emergency call is low because the terminal gives up the current call due to the fact that the network is considered to be abnormal because the emergency call of the VoLTE network fails due to the loss of the emergency default bearer QCI5 in the prior art, and provides a method, a system, a terminal, equipment and a storage medium for the emergency call based on the VoLTE, which can improve the success rate of the emergency call of the VoLTE network.
The invention solves the technical problems through the following technical scheme:
the first aspect of the invention provides a method for emergency call based on VoLTE, which comprises the steps of executing second VoLTE emergency call after the first VoLTE emergency call is successful;
the step of again VoLTE emergency call comprises the steps of:
initiating a first emergency call;
judging whether the first emergency call is successful, if not, executing the following steps:
establishing an emergency default bearer QCI 5;
carrying out emergency registration;
a second emergency call is initiated.
Optionally, the step of initiating the first emergency call further includes the following steps:
acquiring a reconfiguration message after establishing RRC (Radio Resource Control) connection;
and judging whether the emergency default bearer QCI5 is lost or not based on the reconfiguration message, and if so, executing the step of judging whether the first emergency call is successful or not.
Alternatively to this, the first and second parts may,
the step of successful first VoLTE emergency call comprises the steps of:
establishing an emergency default bearer QCI 5;
carrying out emergency registration;
an emergency call is initiated.
The invention provides a system for emergency call based on VoLTE, which comprises a first call module and a second call module; the first calling module is used for realizing the first VoLTE emergency call and calling successfully;
the secondary calling module is used for executing secondary VoLTE emergency calling after the first VoLTE emergency calling is successful;
the re-calling module comprises a first calling unit, a first judging unit, a re-establishing unit, a re-registering unit and a second calling unit;
the first calling unit is used for initiating a first emergency call;
the first judging unit is used for judging whether the first emergency call is successful or not, and if not, the reestablishing unit is called;
the reestablishing unit is used for establishing an emergency default bearer QCI 5;
the re-registration unit is used for performing emergency registration after the re-establishment unit completes calling;
the second call unit is used for initiating a second emergency call after the re-registration unit is called.
Optionally, the recall module further includes a message obtaining unit and a second judging unit;
the message acquisition unit is used for acquiring the reconfiguration message after the RRC connection is established;
the second determining unit is configured to determine whether the emergency default bearer QCI5 is lost based on the reconfiguration message, and if so, invoke the first determining unit.
Alternatively to this, the first and second parts may,
the first calling module comprises a first establishing unit, a first registering unit and a first calling unit:
the first establishing unit is used for establishing an emergency default bearer QCI 5;
the first registration unit is used for performing emergency registration after the first establishing unit is called;
the first call unit is used for initiating an emergency call after the first registration unit is called.
A third aspect of the present invention provides an IMS terminal, including the system for emergency call based on VoLTE according to the second aspect.
A fourth aspect of the present invention provides an electronic device, comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to implement the method for VoLTE-based emergency call according to the first aspect.
A fifth aspect of the present invention provides a computer readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method for VoLTE-based emergency calling of the aforementioned first aspect.
The positive progress effects of the invention are as follows: according to the method, the system, the terminal, the equipment and the storage medium for the emergency call based on the VoLTE, provided by the invention, when the IMS terminal initiates the emergency call again and fails, the failure can be identified to be caused by the fact that the emergency default bearer QCI5 successfully established by the VoLTE emergency call is lost, the emergency bearer QCI5 is further reestablished, and then emergency registration and emergency call are carried out, so that the emergency call again is successfully completed, the problem that the IMS terminal abandons the current call because the IMS terminal directly considers the bearer is lost due to network abnormity in the prior art is avoided, and the success rate of the VoLTE network emergency call is effectively improved.
Drawings
Fig. 1 is a flowchart of a VoLTE-based emergency call method according to embodiment 1 of the present invention.
Fig. 2 is a block diagram of a VoLTE-based emergency call system according to embodiment 2 of the present invention.
Fig. 3 is a schematic diagram of a VoLTE emergency call process performed by an IMS terminal and a network according to embodiment 3 of the present invention.
Fig. 4 is a schematic structural diagram of an electronic device according to embodiment 4 of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
As shown in fig. 1, the present embodiment provides a method for an emergency call based on VoLTE, which includes the following steps:
step S1, the first VoLTE emergency call is successful;
step S2, VoLTE emergency call again.
Wherein, step S2 includes the following steps:
step S201, initiating a first emergency call;
step S202, obtaining a reconfiguration message after establishing RRC connection;
step S203, determining whether the emergency default bearer QCI5 is lost based on the reconfiguration message, if so, performing step S204, otherwise, ending the process;
step S204, judging whether the first emergency call is successful, if not, executing step S205, and if so, ending the process;
step S205, establishing an emergency default bearer QCI 5;
step S206, emergency registration is carried out;
and step S207, initiating a second emergency call.
Wherein, step S1 includes the following steps:
step S101, establishing an emergency default bearer QCI 5;
step S102, performing emergency registration;
step S103, initiating an emergency call.
In the emergency call method based on VoLTE provided in this embodiment, when the IMS terminal initiates an emergency call again, it is found that the emergency default bearer QCI5 is lost, and the IMS terminal does not directly consider that the bearer is lost due to network anomaly and abandons the current call, but reestablishes the emergency default bearer QCI5 again, performs emergency registration again, and then initiates an emergency call to complete the emergency call.
The emergency call method based on the VoLTE provided by the embodiment can identify that the failure reason is that the emergency default bearer QCI5 successfully established for the first VoLTE emergency call is lost when the IMS terminal initiates the emergency call again, further reestablishes the emergency default bearer QCI5, and then performs emergency registration and emergency call, thereby successfully completing the emergency call again, avoiding the problem that the IMS terminal abandons the current call because the IMS terminal directly considers that the bearer is lost due to network abnormality in the prior art, and effectively improving the success rate of the VoLTE network emergency call.
Example 2
As shown in fig. 2, the present embodiment provides a system for emergency call based on VoLTE, which includes a first call module 1 and a second call module 2. The first calling module 1 is used for realizing the first VoLTE emergency call and calling successfully; the recall module 2 is used for executing a recall VoLTE emergency call after the first VoLTE emergency call is successful.
In this embodiment, the recall module 2 includes a first calling unit 21, a first judging unit 22, a reestablishing unit 23, a reregistering unit 24, a second calling unit 25, a message acquiring unit 26, and a second judging unit 27.
The first call unit 21 is used to initiate a first emergency call.
The first determining unit 22 is configured to determine whether the first emergency call is successful, if not, invoke the reestablishing unit 23, and if so, the process is ended and no operation is performed.
The re-establishing unit 23 is used to establish the emergency default bearer QCI 5.
The re-registration unit 24 is configured to perform emergency registration after the call of the re-establishment unit 23 is completed.
The second call unit 25 is configured to initiate a second emergency call after the re-registration unit 24 has completed the call.
The message acquiring unit 26 is configured to acquire the reconfiguration message after the RRC connection is established.
The second determining unit 27 is configured to determine whether the emergency default bearer QCI5 is lost based on the reconfiguration message, if so, invoke the first determining unit 22, and if not, the processing is finished and no operation is performed.
In this embodiment, the first call module 1 includes a first establishing unit 11, a first registering unit 12, and a first calling unit 13.
The first establishing unit 11 is configured to establish an emergency default bearer QCI 5.
The first registration unit 12 is configured to perform emergency registration after the first setup unit is invoked.
The first call unit 13 is configured to initiate an emergency call after the first registration unit call is completed.
According to the embodiment, when the IMS terminal fails to initiate the emergency call again, the reason for the failure can be identified to be that the emergency default bearer QCI5 successfully established for the first VoLTE emergency call is lost, the emergency default bearer QCI5 is further reestablished, then emergency registration and emergency call are performed, so that the emergency call is successfully completed again, the problem that the IMS terminal in the prior art directly considers that the bearer is lost due to network abnormality and abandons the current call is solved, and the success rate of the VoLTE network emergency call is effectively improved.
Example 3
The present embodiment provides an IMS terminal including the VoLTE-based emergency call system of embodiment 2.
Compared with the prior art that the IMS terminal considers that there is a network abnormality and does not initiate any emergency call when the emergency call of the VoLTE network fails due to the loss of the emergency default bearer QCI5, which results in a low success rate of the emergency call, the IMS terminal provided in this embodiment has a higher success rate of performing the VoLTE network emergency call.
In order to further explain the technical solution and technical effect of the present embodiment so as to better understand the present invention, a process of the IMS terminal and the network terminal performing an emergency call of the VoLTE network provided by the present embodiment is described below, and a specific process refers to fig. 3.
The IMS terminal initiates an emergency call for the first time, and the specific process is as follows: the IMS terminal firstly initiates a request for establishing an emergency default bearer QCI5 to the network terminal actively, and completes the establishment of the emergency default bearer QCI5 through interaction with the network terminal; then the IMS terminal carries out emergency registration; finally, the IMS terminal initiates an emergency call to the network. The network operator releases the emergency default bearer QCI5 at the end of the first emergency call for a period of time based on the requirements of the network's own scheduling policy, but by default does not send the deactivate bearer signalling to the IMS terminal. At this time, the IMS terminal considers that the bearer still exists, so the IMS terminal initiates the emergency call again, and after the RRC connection is established, the IMS terminal receives a reconfiguration message fed back by the base station, where the reconfiguration message includes a status description of the bearer, and thus the IMS terminal can know that a DRB (data bearer) corresponding to the emergency bearer QCI5 has been released, and cannot send an emergency call signaling due to the loss of the bearer, resulting in failure of the emergency call again.
When the IMS terminal initiates an emergency call again, the IMS terminal provided in this embodiment considers that the bearer is still in an activated state when it does not receive a signaling for deactivating the emergency default bearer QCI5 from the network, and if the network notifies the IMS terminal of the loss of the bearer through the reconfiguration message after the RRC connection is established, the IMS terminal re-establishes the emergency default bearer QCI5 through the system selection of the emergency call based on VoLTE included in the IMS terminal, re-performs emergency registration, then initiates the emergency call, and finally successfully connects the emergency call. Therefore, the problem of emergency call failure caused by bearing loss is solved, and the robustness and the success rate of the emergency call function of the VoLTE network of the IMS terminal are improved.
Example 4
Fig. 4 is a schematic structural diagram of an electronic device according to embodiment 4 of the present invention. The electronic device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, which when executed by the processor implements the method of VoLTE-based emergency call in embodiment 1. The electronic device 30 shown in fig. 4 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiment of the present invention.
As shown in fig. 4, the electronic device 30 may be embodied in the form of a general purpose computing device, which may be, for example, a server device. The components of the electronic device 30 may include, but are not limited to: the at least one processor 31, the at least one memory 32, and a bus 33 connecting the various system components (including the memory 32 and the processor 31).
The bus 33 includes a data bus, an address bus, and a control bus.
The memory 32 may include volatile memory, such as Random Access Memory (RAM)321 and/or cache memory 322, and may further include Read Only Memory (ROM) 323.
The processor 31 executes various functional applications and data processing, such as a method of VoLTE-based emergency call in embodiment 1 of the present invention, by running a computer program stored in the memory 32.
The electronic device 30 may also communicate with one or more external devices 34 (e.g., keyboard, pointing device, etc.). Such communication may be through input/output (I/O) interfaces 35. Also, model-generating device 30 may also communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network, such as the Internet) via network adapter 36. As shown, network adapter 36 communicates with the other modules of model-generating device 30 via bus 33. It should be understood that although not shown in the figures, other hardware and/or software modules may be used in conjunction with the model-generating device 30, including but not limited to: microcode, device drivers, redundant processors, external disk drive arrays, RAID (disk array) systems, tape drives, and data backup storage systems, etc.
It should be noted that although in the above detailed description several units/modules or sub-units/modules of the electronic device are mentioned, such a division is merely exemplary and not mandatory. Indeed, the features and functionality of two or more of the units/modules described above may be embodied in one unit/module according to embodiments of the invention. Conversely, the features and functions of one unit/module described above may be further divided into embodiments by a plurality of units/modules.
Example 5
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the method of VoLTE-based emergency calling of embodiment 1.
More specific examples, among others, that the readable storage medium may employ may include, but are not limited to: a portable disk, a hard disk, random access memory, read only memory, erasable programmable read only memory, optical storage device, magnetic storage device, or any suitable combination of the foregoing.
In a possible implementation, the invention can also be implemented in the form of a program product comprising program code for causing a terminal device to perform the steps of the method of implementing a VoLTE-based emergency call in example 1, when said program product is run on said terminal device.
Where program code for carrying out the invention is written in any combination of one or more programming languages, the program code may be executed entirely on the user device, partly on the user device, as a stand-alone software package, partly on the user device and partly on a remote device or entirely on the remote device.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (9)
1. A method for emergency call based on VoLTE comprises the steps of executing second VoLTE emergency call after first VoLTE emergency call is successful;
wherein the step of again VoLTE emergency call comprises the steps of:
initiating a first emergency call;
judging whether the first emergency call is successful, if not, executing the following steps:
establishing an emergency default bearer QCI 5;
carrying out emergency registration;
a second emergency call is initiated.
2. The method of VoLTE-based emergency calls of claim 1, wherein the step of initiating the first emergency call is further followed by the steps of:
acquiring a reconfiguration message after establishing RRC connection;
and judging whether the emergency default bearer QCI5 is lost or not based on the reconfiguration message, and if so, executing the step of judging whether the first emergency call is successful or not.
3. Method for VoLTE based emergency calling according to claim 1,
the step of successful first VoLTE emergency call comprises the steps of:
establishing an emergency default bearer QCI 5;
carrying out emergency registration;
an emergency call is initiated.
4. A system for emergency calling based on VoLTE comprises a first calling module and a second calling module; the first calling module is used for realizing the first VoLTE emergency call and calling successfully;
the secondary calling module is used for executing secondary VoLTE emergency calling after the first VoLTE emergency calling is successful;
the re-calling module comprises a first calling unit, a first judging unit, a re-establishing unit, a re-registering unit and a second calling unit;
the first calling unit is used for initiating a first emergency call;
the first judging unit is used for judging whether the first emergency call is successful or not, and if not, the reestablishing unit is called;
the reestablishing unit is used for establishing an emergency default bearer QCI 5;
the re-registration unit is used for performing emergency registration after the re-establishment unit completes calling;
the second call unit is used for initiating a second emergency call after the re-registration unit is called.
5. The VoLTE based emergency call system of claim 4, wherein the recall module further comprises a message acquisition unit and a second decision unit;
the message acquisition unit is used for acquiring the reconfiguration message after the RRC connection is established;
the second determining unit is configured to determine whether the emergency default bearer QCI5 is lost based on the reconfiguration message, and if so, invoke the first determining unit.
6. System for VoLTE based emergency calls according to claim 4,
the first calling module comprises a first establishing unit, a first registering unit and a first calling unit:
the first establishing unit is used for establishing an emergency default bearer QCI 5;
the first registration unit is used for performing emergency registration after the first establishing unit is called;
the first call unit is used for initiating an emergency call after the first registration unit is called.
7. An IMS terminal, characterized in that it comprises a system for VoLTE-based emergency calls according to any of claims 4 to 6.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the computer program, implements the method for VoLTE-based emergency calls according to any of claims 1 to 3.
9. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method of VoLTE-based emergency calling according to any one of claims 1 to 3.
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| CN116601933A (en) * | 2020-12-04 | 2023-08-15 | 宇龙计算机通信科技(深圳)有限公司 | Emergency call method, device, storage medium and terminal |
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