CN108616558B - Method and device for establishing call and user equipment - Google Patents
Method and device for establishing call and user equipment Download PDFInfo
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- CN108616558B CN108616558B CN201611219365.9A CN201611219365A CN108616558B CN 108616558 B CN108616558 B CN 108616558B CN 201611219365 A CN201611219365 A CN 201611219365A CN 108616558 B CN108616558 B CN 108616558B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/14—Session management
- H04L67/141—Setup of application sessions
Abstract
The invention provides a method and a device for establishing a call and user equipment. The method comprises the following steps: establishing a TCP link with a network side, and sending a call request message to the network side through the TCP link, wherein the call request message is used for requesting to establish a call; receiving a reset RST message fed back by the network side, wherein the RST message is used for representing the TCP link is abnormal; and determining that the TCP link is abnormal based on the RST message, reestablishing a new TCP link, and resending the call request message to the network side through the new TCP link. The method and the device are used for ensuring the dialing call completing rate of the VoLTE call.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for establishing a call, and a user equipment.
Background
Voice over LTE (Voice service over LTE) is an IP (Internet Protocol) data transmission technology, and accesses an IMS (IP Multimedia core network Subsystem) network of an operator through an LTE (Long Term Evolution) network to perform services such as Voice, video, and short messages, so that data and Voice services can be unified in the same network.
When a terminal supporting VoLTE dials, it needs to send an invite message to a TCP/IP (Transmission Control Protocol/Internet Protocol) Protocol stack based on an IMS Protocol stack. Because of network or bottom layer abnormality, after the invite message is sent to the TCPIP protocol stack, the TCPIP protocol stack may receive a notification (RST message, i.e., Reset message) that the network disconnects the TCP link, and the invite message cannot be sent to the called terminal, which results in failure of the dialing.
In the process of implementing the invention, the inventor finds that at least the following technical problems exist in the prior art:
how to improve the dialing success rate of the VoLTE is a problem to be solved urgently.
Disclosure of Invention
The method, the device and the user equipment for establishing the call can solve the problem of how to improve the success rate of VoLTE dialing.
In a first aspect, the present invention provides a method for establishing a call, where the method includes:
establishing a Transmission Control Protocol (TCP) link with a network side, and sending a call request message to the network side through the TCP link, wherein the call request message is used for requesting to establish a call;
receiving a reset RST message fed back by the network side, wherein the RST message is used for representing the TCP link is abnormal;
and determining that the TCP link is abnormal based on the RST message, reestablishing a new TCP link, and resending the call request message to the network side through the new TCP link.
Optionally, the receiving the RST message fed back by the network side includes: and receiving the RST message fed back by the network side based on a transmission control protocol/Internet protocol TCP/IP protocol stack, and sending the RST message to an IMS protocol stack of an IP multimedia core network subsystem.
Optionally, the determining that the TCP link is abnormal based on the RST message, re-establishing a new TCP link, and re-sending the call request message to the network side through the new TCP link includes:
receiving the RST message based on the IMS protocol stack, and determining that the TCP link is abnormal according to the RST message;
sending a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack, wherein the TCP link establishment request is used for establishing the new TCP link;
and based on the IMS protocol stack, retransmitting the call request message to the TCP/IP protocol stack, and retransmitting the call request message to a network side through the new TCP link based on the TCP/IP protocol stack.
Optionally, before the sending a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack, the method further includes:
checking whether a response to a talk request message is waiting on the TCP link based on the IMS protocol stack;
the sending a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack includes:
sending a TCP link setup request to the TCP/IP protocol stack when it is determined based on the IMS protocol stack that a response to a talk request message is waiting on the TCP link.
Optionally, after the TCP link is established with the network side and a call request message is sent to the network side through the TCP link, the method further includes:
and carrying out local backup on the call request message.
In a second aspect, the present invention provides an apparatus for establishing a call, including:
the system comprises a sending module, a receiving module and a sending module, wherein the sending module is used for establishing a Transmission Control Protocol (TCP) link with a network side and sending a call request message to the network side through the TCP link, and the call request message is used for establishing a call;
a receiving module, configured to receive a RST resetting message fed back by the network side, where the RST resetting message is used to characterize that the TCP link is abnormal;
the sending module is further configured to determine that the TCP link is abnormal based on the RST message received by the receiving module, reestablish a new TCP link, and resend the call request message to the network side through the new TCP link.
Optionally, the receiving module includes:
and the transmission unit is used for receiving the RST message fed back by the network side based on the TCP/IP protocol stack and sending the RST message to the IMS protocol stack.
Optionally, the sending module includes a determining unit, a building unit, and a sending unit:
the determining unit is configured to receive the RST message based on the IMS protocol stack, and determine that the TCP link is abnormal according to the RST message;
the establishing unit is configured to send a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack, where the TCP link establishment request is used to establish the new TCP link;
the sending unit is configured to resend the call request message to the TCP/IP protocol stack based on the IMS protocol stack, and the TCP/IP protocol stack resends the call request message to the network side through the new TCP link.
Optionally, the sending module further includes:
a checking unit configured to check whether a response to the call request message is waiting on the TCP link based on the IMS protocol stack;
the establishing unit is configured to send a TCP link establishment request to the TCP/IP protocol stack when the checking unit determines that a response to the call request message is waiting on the TCP link based on the IMS protocol stack.
Optionally, the sending module is further configured to establish a TCP (transmission control protocol) link between the sending module and a network side, and perform local backup on a call request message after sending the call request message to the network side through the TCP link.
In a third aspect, the present invention provides a user equipment, where the user equipment includes the above apparatus for establishing a call.
The method, the device and the user equipment for establishing the call provided by the embodiment of the invention establish a Transmission Control Protocol (TCP) link with a network side, and send a call request message to the network side through the TCP link; receiving RST information fed back by the network side; and determining that the TCP link is abnormal based on the RST message, reestablishing a new TCP link, and resending the invite message to the network side through the new TCP link. Compared with the prior art, by adopting the method, the device and the user equipment for establishing the call provided by the embodiment, when the TCP link between the network side and the user equipment is abnormal, the call request message is retransmitted to the network side by reestablishing a new TCP link, so that the VoLTE call can be reestablished, and the dialing success rate of the VoLTE call can be improved.
Drawings
Fig. 1 is a flowchart of a method for establishing a call according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for establishing a call according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of an apparatus for establishing a call according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an apparatus for establishing a call according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of an apparatus for establishing a call according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for establishing a call according to another embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for establishing a call, as shown in fig. 1, the method comprises:
s11, the user equipment establishes a TCP link with the network side, and sends an invite message to the network side through the TCP link, wherein the invite message is used for requesting to establish a call.
It should be noted that the method for establishing a call provided in this embodiment is applicable to a user equipment supporting VoLTE to execute, for example: a terminal such as a smart phone or a smart computer, but not limited thereto.
The network side may be a core network supporting the VoLTE service, and is generally operated and maintained by a communication operator, and a VoLTE call may be established between a plurality of VoLTE user equipments.
S12, the user equipment receives RST (Reset) information fed back by the network side, and the RST information is used for representing the TCP link is abnormal.
When a TCP link between the user equipment and the network side is abnormal, the network side can generate RST information to the user equipment so as to inform the user equipment that the current TCP link is disconnected.
S13, the user equipment determines that the TCP link is abnormal based on the RST message, reestablishes a new TCP link, and resends the invite message to the network side through the new TCP link.
It should be noted that, through step S13, when the TCP link between the ue and the network side is disconnected, resulting in a dialing failure, the ue may send an invite message to the network side again, and initiate a call again, so as to establish a VoLTE call successfully.
According to the method for establishing the call provided by the embodiment of the invention, when the TCP link between the user equipment and the network side is abnormal, the user equipment can re-send the invite message to the network side by re-establishing a new TCP link, so that the VoLTE call is re-established, and the call completing rate of the VoLTE call is improved.
Optionally, the present embodiment further provides a method for establishing a call, where the method is applicable to a user equipment supporting VoLTE, and is used to establish a VoLTE call service. Specifically, the user equipment in this embodiment at least includes an IMS protocol stack and a TCP/IP protocol stack. As shown in fig. 2, the method includes:
and S21, the IMS protocol stack receives the dialing instruction.
Generally, the dialing instruction is triggered by a user operation behavior, or the dialing instruction is triggered by an APP (Application program) in the user equipment, which is not limited in this embodiment.
And S22, the IMS protocol stack indicates the TCP/IP protocol stack to establish a TCP link with the network side based on the dialing instruction.
S23, the IMS protocol stack sends the invite message to the TCP/IP protocol stack, and the invite message is backed up locally.
In step S23, the IMS protocol stack, by backing up the invite message, may directly call the locally backed up invite message to resend the invite message when the subsequent TCP link is unavailable, without the user initiating a dialing instruction again, so that the success rate of user dialing may be improved.
And S24, the TCP/IP protocol stack receives the invite message, stores the invite message into a sending queue and waits for sending.
It is worth to be noted that the method for establishing a call provided in this embodiment is mainly used to solve the problem that the invite message fails to be sent when the TCP link is abnormal. Specifically, when the TCP link is abnormal, the following steps are performed:
s25, before the TCP/IP protocol stack sends the invite message, because of the network exception, the TCP/IP protocol stack receives the RST message sent by the network side.
Wherein, the RST message is used to characterize the TCP link in step S22 as abnormal.
And S26, the TCP/IP protocol stack sends the RST message to the IMS protocol stack.
And S27, the IMS protocol stack receives the RST message, and determines that the TCP link is abnormal according to the RST message.
S28, the IMS protocol stack checks whether the response of the invite message is waiting on the TCP link; when the IMS protocol stack determines that a response to an invite message is being awaited on the TCP link, a TCP link establishment request is sent to the TCP/IP protocol stack.
It should be noted that, through step S28, since the TCP link is abnormal and currently waits for a response of invite message on the TCP link, it may be further determined that the TCP link has failed to implement VoLTE call, and a new TCP link needs to be re-established.
And S29, the TCP/IP protocol stack receives the TCP link establishment request and establishes a new TCP link with the network side.
And S30, the IMS protocol stack resends the invite message to the TCP/IP protocol stack.
And S31, the TCP/IP protocol stack resends the invite message to the network side through the new TCP link.
After the network side receives the invite message, if the new TCP link can be used normally, the VoLTE call can be successfully established subsequently. If the new TCP link fails, the embodiment is executed again, and the VoLTE call is established by reestablishing the TCP link and resending the invite message until the VoLTE call is successfully realized.
Optionally, after receiving a response to the invite message from the network side, the IMS protocol stack deletes the invite message for local backup, so as to save storage resources.
By adopting the method for establishing the call provided by the embodiment, when the VoLTE call is failed to be established due to network abnormality between the user equipment and the network side, the VoLTE call is successfully established by reestablishing a new TCP link and resending an invite command. Compared with the prior art, by adopting the method for establishing the call provided by the embodiment, when the network abnormity occurs, the VoLTE call can be successfully established without triggering the dialing instruction for many times by the user, and the call completing rate of the VoLTE call can be effectively ensured.
An embodiment of the present invention further provides a device for establishing a call, as shown in fig. 3, the device includes:
a sending module 31, configured to establish a TCP link with a network side, and send a call request message to the network side through the TCP link, where the call request message is used to establish a call;
a receiving module 32, configured to receive a RST reset message fed back by the network side, where the RST message is used to characterize that the TCP link is abnormal;
the sending module 31 is further configured to determine that the TCP link is abnormal based on the RST message received by the receiving module 32, reestablish a new TCP link, and resend the call request message to the network side through the new TCP link.
Optionally, as shown in fig. 4, the receiving module 32 includes:
a transmission unit 321, configured to receive the RST message fed back by the network side based on the TCP/IP protocol stack, and send the RST message to the IMS protocol stack.
Optionally, as shown in fig. 5, the sending module 31 includes:
a determining unit 311, configured to receive the RST message based on the IMS protocol stack, and determine that an exception occurs in the TCP link according to the RST message;
an establishing unit 312, configured to send a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack, where the TCP link establishment request is used to establish the new TCP link;
a sending unit 313, configured to resend the call request message to the TCP/IP protocol stack based on the IMS protocol stack, where the TCP/IP protocol stack resends the call request message to the network side through the new TCP link.
Optionally, as shown in fig. 6, the sending module 31 further includes:
a checking unit 314 configured to check whether a response to the call request message is waiting on the TCP link based on the IMS protocol stack;
the establishing unit 312 is configured to send a TCP link establishment request to the TCP/IP protocol stack when the checking unit 314 determines that a response to the invite message is waiting on the TCP link based on the IMS protocol stack.
Optionally, the sending module 31 is further configured to establish a TCP link between the sending module 31 and the network side, and perform local backup on the call request message after sending the call request message to the network side through the TCP link.
According to the device for establishing the call provided by the embodiment of the invention, when the VoLTE call is failed to be established due to network abnormality between the device and the network side, the VoLTE call is successfully established by reestablishing a new TCP link and resending an invite command. Compared with the prior art, by adopting the device for establishing the call provided by the embodiment, when the network abnormity occurs, the VoLTE call can be successfully established without triggering the dialing instruction for many times by the user, and the call completing rate of the VoLTE call can be effectively ensured.
An embodiment of the present invention further provides a user equipment, where the user equipment includes the device for establishing a call shown in fig. 3 to fig. 6.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method for establishing a call, comprising:
establishing a Transmission Control Protocol (TCP) link with a network side, sending a call request message to the network side through the TCP link, and locally backing up the call request message, wherein the call request message is used for requesting to establish a call;
receiving a reset RST message fed back by the network side, wherein the RST message is used for representing the TCP link is abnormal;
and determining that the TCP link is abnormal based on the RST message, reestablishing a new TCP link, and resending the call request message to the network side through the new TCP link.
2. The method of claim 1, wherein the receiving the RST message fed back by the network side comprises:
and receiving the RST message fed back by the network side based on a transmission control protocol/Internet protocol TCP/IP protocol stack, and sending the RST message to an IMS protocol stack of an IP multimedia core network subsystem.
3. The method according to claim 2, wherein the determining that the TCP link is abnormal based on the RST message, re-establishing a new TCP link, and re-sending the call request message to the network side via the new TCP link comprises:
receiving the RST message based on the IMS protocol stack, and determining that the TCP link is abnormal according to the RST message;
sending a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack, wherein the TCP link establishment request is used for establishing the new TCP link;
and based on the IMS protocol stack, retransmitting the call request message to the TCP/IP protocol stack, and retransmitting the call request message to a network side through the new TCP link based on the TCP/IP protocol stack.
4. The method of claim 3, wherein prior to said sending a TCP link establishment request to said TCP/IP protocol stack based on said IMS protocol stack, said method further comprises:
checking whether a response to a talk request message is waiting on the TCP link based on the IMS protocol stack;
the sending a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack includes:
sending a TCP link setup request to the TCP/IP protocol stack when it is determined based on the IMS protocol stack that a response to a talk request message is waiting on the TCP link.
5. An apparatus for establishing a call, comprising:
the system comprises a sending module, a receiving module and a sending module, wherein the sending module is used for establishing a Transmission Control Protocol (TCP) link with a network side, sending a call request message to the network side through the TCP link, and locally backing up the call request message, and the call request message is used for establishing a call;
a receiving module, configured to receive a RST resetting message fed back by the network side, where the RST resetting message is used to characterize that the TCP link is abnormal;
the sending module is further configured to determine that the TCP link is abnormal based on the RST message received by the receiving module, reestablish a new TCP link, and resend the call request message to the network side through the new TCP link.
6. The apparatus of claim 5, wherein the receiving module comprises:
and the transmission unit is used for receiving the RST message fed back by the network terminal based on the TCP/IP protocol stack and sending the RST message to the IMS protocol stack.
7. The apparatus of claim 6, wherein the sending module comprises:
a determining unit, configured to receive the RST message based on the IMS protocol stack, and determine that an exception occurs in the TCP link according to the RST message;
an establishing unit, configured to send a TCP link establishment request to the TCP/IP protocol stack based on the IMS protocol stack, where the TCP link establishment request is used to establish the new TCP link;
and the sending unit is used for resending the call request message to the TCP/IP protocol stack based on the IMS protocol stack, and the TCP/IP protocol stack resends the call request message to a network side through the new TCP link.
8. The apparatus of claim 7, wherein the sending module further comprises:
a checking unit configured to check whether a response to the call request message is waiting on the TCP link based on the IMS protocol stack;
the establishing unit is configured to send a TCP link establishment request to the TCP/IP protocol stack when the checking unit determines that a response to the call request message is waiting on the TCP link based on the IMS protocol stack.
9. A user equipment, characterized in that the user equipment comprises the apparatus for establishing a call according to any one of claims 5 to 8.
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| CN114826888A (en) * | 2022-04-27 | 2022-07-29 | 济南浪潮数据技术有限公司 | Message sending method, device, equipment and storage medium |
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