CN117278982A - Video call method, device, equipment and storage medium - Google Patents

Video call method, device, equipment and storage medium Download PDF

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Publication number
CN117278982A
CN117278982A CN202311550440.XA CN202311550440A CN117278982A CN 117278982 A CN117278982 A CN 117278982A CN 202311550440 A CN202311550440 A CN 202311550440A CN 117278982 A CN117278982 A CN 117278982A
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China
Prior art keywords
data packet
sim card
terminal
link
video
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CN202311550440.XA
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CN117278982B (en
Inventor
吴丹
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Beijing Xiaomi Mobile Software Co Ltd
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Beijing Xiaomi Mobile Software Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/183—Processing at user equipment or user record carrier
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/30—Network data restoration; Network data reliability; Network data fault tolerance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Multimedia (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The disclosure relates to a video call method, a device, equipment and a storage medium, wherein the method comprises the following steps: responding to video call with a second terminal through a video special bearer of the first SIM card, sending a first uplink data packet to the second terminal based on the video special bearer, and receiving a first downlink data packet returned by the second terminal based on the video special bearer; responding to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and the second SIM card meeting a data link establishment condition, and establishing a data link with the second terminal based on the second SIM card; transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link; and determining a target downlink data packet based on the first downlink data packet and the second downlink data packet. The method and the device can effectively improve the video call quality.

Description

Video call method, device, equipment and storage medium
Technical Field
The disclosure relates to the field of communication technologies, and in particular, to a video call method, a device, equipment and a storage medium.
Background
In the related art, a video telephony call (VTCall) scheme provided by an operator mainly transmits video packets through a video dedicated bearer. The video dedicated bearer refers to a radio resource reserved specifically for the video call by the network and used for transmitting video packets. The video dedicated bearer uses higher priority quality of service (QoS, quality of Service) parameters to ensure that the bandwidth, delay, reliability, etc. requirements of video transmission are met.
However, video calls typically use more network resources than voice calls because video frames are transmitted and packets are typically larger. Although the video transmission is not problematic in a good network environment, when the network environment is poor, video packets are easily lost, and thus problems such as video call jamming and mosaics are caused.
Disclosure of Invention
In order to overcome the problems in the related art, embodiments of the present disclosure provide a video call method, apparatus, device, and storage medium, which are used to solve the drawbacks in the related art.
According to a first aspect of an embodiment of the present disclosure, there is provided a video call method applied to a first terminal supporting a plurality of Subscriber Identity Module (SIM) cards, where the plurality of SIM cards includes a first SIM card and a second SIM card, the method including:
Responding to video call with a second terminal through a video special bearer of the first SIM card, sending a first uplink data packet to the second terminal based on the video special bearer, and receiving a first downlink data packet returned by the second terminal based on the video special bearer;
responding to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and the second SIM card meeting a data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
and determining call content of the video call based on the first downlink data packet and the second downlink data packet.
In some embodiments, the method further comprises:
and determining that the uplink data transmission quality of the first SIM card meets the set transmission quality condition in response to the uplink block error rate BLER of the first SIM card being greater than or equal to a set block error rate threshold.
In some embodiments, the method further comprises:
and responding to the signal quality of the second SIM card meeting the set signal quality condition, and determining that the second SIM card meets the data link establishment condition for the network card of the first terminal.
In some embodiments, the method further comprises:
detecting a signal quality index value of the second SIM card, wherein the signal quality index value comprises Reference Signal Received Power (RSRP) and/or signal-to-noise ratio (SNR);
and determining that the signal quality of the second SIM card meets the set signal quality condition in response to the signal quality index value reaching a set index threshold.
In some embodiments, the data link includes a first sub-link and a second sub-link, the first sub-link is a connection link between the second SIM card and a target server, the second sub-link is a connection link between the target server and the second terminal, and the target server includes a network address translation NAT server previously built on a public network;
the establishing a data link with the second terminal based on the second SIM card comprises the following steps:
connecting the second SIM card with the target server to obtain the first sub-link;
And transmitting terminal information of the second terminal to the target service end in response to the first sub-link, so as to request the target service end to establish connection with the second terminal, and obtaining the second sub-link, wherein the terminal information comprises an IP address of the second terminal.
In some embodiments, the method further comprises:
copying the first uplink data packet to obtain a copied uplink data packet;
and sending the duplicate uplink data packet to the second SIM card, so that the second SIM card takes the duplicate uplink data packet as the second uplink data packet, and the operation of sending the second uplink data packet to the second terminal based on the data link is executed.
In some embodiments, the determining the call content of the video call based on the first downlink data packet and the second downlink data packet includes:
responding to the data packet with the target SEQ serial number missing in the first downlink data packet, and filling the data packet missing in the first downlink data packet based on the data packet with the target SEQ serial number in the second downlink data packet to obtain the target downlink data packet;
And analyzing the call content of the video call based on the target downlink data packet.
In some embodiments, the method further comprises:
transmitting a video call request to the second terminal based on an IP multimedia system IMS through the first SIM card;
and establishing the video special bearer in response to receiving response information returned by the second terminal based on the video call request.
According to a second aspect of the embodiments of the present disclosure, there is provided a video telephony device applied to a first terminal supporting a plurality of SIM cards including a first SIM card and a second SIM card, the device including:
the special bearing receiving and transmitting module is used for responding to video call with a second terminal through a video special bearing of the first SIM card, sending a first uplink data packet to the second terminal based on the video special bearing, and receiving a first downlink data packet returned by the second terminal based on the video special bearing;
the data link establishment module is used for responding to the condition that the uplink data transmission quality of the first SIM card meets the set transmission quality, and the second SIM card meets the data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
The data link transceiver module is used for transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
and the call content determining module is used for determining the call content of the video call based on the first downlink data packet and the second downlink data packet.
In some embodiments, the apparatus further comprises:
and the sending quality determining module is used for determining that the sending quality of the uplink data of the first SIM card meets the set sending quality condition in response to the fact that the BLER of the uplink block error rate of the first SIM card is larger than or equal to a set block error rate threshold.
In some embodiments, the apparatus further comprises:
the establishment condition determining module is used for responding to the signal quality of the second SIM card meeting the set signal quality condition, and the second SIM card is an internet card of the first terminal, and determining that the second SIM card meets the data link establishment condition.
In some embodiments, the establishment condition determination module further comprises:
an index value detection unit, configured to detect a signal quality index value of the second SIM card, where the signal quality index value includes a reference signal received power RSRP and/or a signal-to-noise ratio SNR;
And the signal quality determining unit is used for determining that the signal quality of the second SIM card meets the set signal quality condition in response to the signal quality index value reaching a set index threshold.
In some embodiments, the data link includes a first sub-link and a second sub-link, the first sub-link is a connection link between the second SIM card and a target server, the second sub-link is a connection link between the target server and the second terminal, and the target server includes a network address translation NAT server previously built on a public network;
the data link establishment module comprises:
the first link unit is used for connecting the second SIM card with the target server to obtain the first sub-link;
and the second link unit is used for responding to the first sub-link and sending terminal information of the second terminal to the target service end so as to request the target service end to establish connection with the second terminal and obtain the second sub-link, wherein the terminal information comprises an IP address of the second terminal.
In some embodiments, the apparatus further comprises a data replication transmission module;
The data copying and transmitting module comprises:
the data copying unit is used for copying the first uplink data packet to obtain a copied uplink data packet;
and the data sending unit is used for sending the replication uplink data packet to the second SIM card so that the second SIM card can take the replication uplink data packet as the second uplink data packet, and the operation of sending the second uplink data packet to the second terminal based on the data link is executed.
In some embodiments, the call content determining module is further configured to:
responding to the data packet with the target SEQ serial number missing in the first downlink data packet, and filling the data packet missing in the first downlink data packet based on the data packet with the target SEQ serial number in the second downlink data packet to obtain the target downlink data packet;
and analyzing the call content of the video call based on the target downlink data packet.
In some embodiments, the apparatus further comprises: a dedicated bearer establishment module;
the dedicated bearer establishment module includes:
a call request sending unit, configured to send, through the first SIM card, a video call request to the second terminal based on an IP multimedia system IMS;
And the special bearer establishment unit is used for establishing the video special bearer in response to receiving response information returned by the second terminal based on the video call request.
According to a third aspect of the embodiments of the present disclosure, there is provided a terminal device supporting a plurality of SIM cards including a first SIM card and a second SIM card, the device including:
a processor and a memory for storing a computer program;
wherein the processor is configured to implement, when executing the computer program:
responding to video call with a second terminal through a video special bearer of the first SIM card, sending a first uplink data packet to the second terminal based on the video special bearer, and receiving a first downlink data packet returned by the second terminal based on the video special bearer;
responding to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and the second SIM card meeting a data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
And determining call content of the video call based on the first downlink data packet and the second downlink data packet.
According to a fourth aspect of embodiments of the present disclosure, there is provided a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements:
responding to video call with a second terminal through a video special bearer of a first SIM card, sending a first uplink data packet to the second terminal based on the video special bearer, and receiving a first downlink data packet returned by the second terminal based on the video special bearer;
responding to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and a second SIM card meeting a data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
and determining call content of the video call based on the first downlink data packet and the second downlink data packet.
The technical scheme provided by the embodiment of the disclosure can comprise the following beneficial effects:
according to the method, video call is conducted with a second terminal through a video special bearer passing through a first SIM card, a first uplink data packet is sent to the second terminal based on the video special bearer, a first downlink data packet returned by the second terminal is received based on the video special bearer, then call content of the video call is determined based on the first downlink data packet and the second downlink data packet, the data link establishment condition is met by the second SIM card, a data link is established based on the second SIM card and the second terminal, a second uplink data packet is sent to the second terminal based on the data link, a second downlink data packet returned by the second terminal is received based on the data link, and further, the call content of the video call is determined based on the first downlink data packet and the second downlink data packet.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.
FIG. 1 is a flow chart illustrating a method of video telephony in accordance with an exemplary embodiment of the present disclosure;
fig. 2 is a flowchart showing how it is determined that the signal quality of the second SIM card satisfies the set signal quality condition according to an exemplary embodiment of the present disclosure;
fig. 3 is a flow chart illustrating how a data link is established with the second terminal based on the second SIM card according to an exemplary embodiment of the present disclosure;
FIG. 4 is a flow chart illustrating a video call method according to yet another exemplary embodiment of the present disclosure;
fig. 5 is a flow chart illustrating how the video-specific bearer is established according to an exemplary embodiment of the present disclosure;
FIG. 6 is a block diagram of a video telephony apparatus in accordance with an exemplary embodiment of the present disclosure;
FIG. 7 is a block diagram of yet another video telephony apparatus in accordance with an exemplary embodiment of the present disclosure;
Fig. 8 is a block diagram of a terminal device according to an exemplary embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present disclosure as detailed in the accompanying claims.
Video call is also called video telephone, and its lines are mainly divided into IP (Internet Protocol ) lines and ordinary telephone lines. Operators can offer both voice telephony and video telephony based services. Unlike video calls in instant messaging software (e.g., weChat, etc.), video telephony (VTCall) services provided by operators are based on operator wireless line resources, as are normally dialed phones.
DSDA (Dual SIM Dual Activate, dual card dual activation technology), a technology that allows two cards to establish data connections with corresponding networks at the same time, respectively. The technology supports that two RRC (Raido Resource Control, radio resource control) links are established at the same time, and two cards respectively use different RRC links to communicate with a network without interference. DSDA supports three scenarios of dual-card voice + voice, data + data.
In the related art, the existing design scheme of video call is as follows: video packets are transmitted over a video-specific bearer. The video dedicated bearer refers to a radio resource reserved specifically for the video call by the network and used for transmitting video packets. The video dedicated bearer uses higher priority quality of service (QoS, quality of Service) parameters to ensure that the bandwidth, delay, reliability, etc. requirements of video transmission are met.
However, video calls typically use more network resources than voice calls because video frames are transmitted and packets are typically larger. Although the video transmission is not problematic in a good network environment, when the network environment is poor, video packets are easily lost, and thus problems such as video call jamming and mosaics are caused.
In view of this, the present disclosure provides the following video call method, apparatus, device, and storage medium to solve the above-mentioned problems in the related art.
FIG. 1 is a flow chart illustrating a method of video telephony in accordance with an exemplary embodiment; the method of the present embodiment may be performed by a video telephony device, which may be configured in a terminal device (hereinafter referred to as a first terminal for convenience of distinction) that supports multiple SIM cards, such as a mobile phone, a smart watch, a tablet computer, etc., where the multiple SIM cards include a first SIM card and a second SIM card. Specifically, as shown in fig. 1, the method includes the following steps S101 to S103:
In step S101, in response to a video call with a second terminal through a video dedicated bearer of the first SIM card, a first uplink data packet is sent to the second terminal based on the video dedicated bearer, and a first downlink data packet returned by the second terminal is received based on the video dedicated bearer.
In this embodiment, when the first terminal performs a video call with the second terminal through the video dedicated bearer of the first SIM card, the first uplink data packet may be sent to the second terminal based on the video dedicated bearer, and the first downlink data packet returned by the second terminal may be received based on the video dedicated bearer.
In some embodiments, the first SIM card may send a data packet (i.e., a first uplink data packet) to the second terminal through the network side, and receive a data packet (i.e., a first downlink data packet) from the second terminal through the network side.
Illustratively, the first uplink data packet may be an uplink Video real-time transport protocol (Up Linkvideo Real-time Transport Protocol, abbreviated as UL Video RTP) packet;
the first downlink data packet may be a downlink Video real-time transport protocol (Down Linkvideo Real-time Transport Protocol, abbreviated as DL Video RTP) packet.
As mentioned above, the video dedicated bearer refers to the radio resources reserved specifically for the video call by the network side for transmitting video packets. The manner of establishing the video dedicated bearer may be referred to in the related art, or may be referred to in the embodiment shown in fig. 5 described below, which will not be described in detail here.
In step S102, in response to the uplink data transmission quality of the first SIM card meeting the set transmission quality condition, and the second SIM card meeting the data link establishment condition, a data link is established with the second terminal based on the second SIM card.
In this embodiment, when the video dedicated bearer of the first SIM card of the first terminal sends a first uplink data packet to the second terminal, and receives, based on the video dedicated bearer, a first downlink data packet returned by the second terminal, the uplink data sending quality of the first SIM card may be detected, and then, whether the uplink data sending quality of the first SIM card meets the set sending quality condition is determined, and further, after it is determined that the uplink data sending quality of the first SIM card meets the set sending quality condition, whether the second SIM card meets the data link establishment condition may be further determined, so that when it is determined that the second SIM card meets the data link establishment condition, a data link may be established based on the second SIM card and the second terminal.
That is, in this embodiment, the conditions that the second SIM card needs to establish a data link to assist the first SIM card in transmitting video call data, that is, the set transmission quality conditions corresponding to the first SIM card and the data link establishment conditions corresponding to the second SIM card, may be preset, and then, when the first SIM card and the second SIM card respectively meet the conditions, the data link may be established based on the second SIM card and the second terminal.
In some embodiments, the first terminal may determine that the uplink data transmission quality of the first SIM card meets the set transmission quality condition in response to the uplink block error rate BLER of the first SIM card being greater than or equal to a set block error rate threshold. That is, the uplink data transmission quality of the first SIM card meets the set transmission quality condition, including that the uplink block error rate BLER of the first SIM card is greater than or equal to a set block error rate threshold.
In other embodiments, the first terminal may determine that the second SIM card meets the data link establishment condition in response to the signal quality of the second SIM card meeting a set signal quality condition, and the second SIM card is an internet card of the first terminal. Namely, the second SIM card satisfies the data link establishment condition, including the following two aspects: (1) The signal quality of the second SIM card meets the set signal quality condition; (2) The second SIM card is an Internet card of the first terminal, namely the mobile data used by the first terminal is provided by the second SIM card.
The manner in which the signal quality of the second SIM card meets the set signal quality condition may be referred to the embodiment shown in fig. 2 described below, which will not be described in detail here.
In step S103, a second uplink data packet is sent to the second terminal based on the data link, and a second downlink data packet returned by the second terminal is received based on the data link.
In this embodiment, after a data link is established between the second SIM card and the second terminal, a second uplink data packet may be sent to the second terminal based on the data link, and a second downlink data packet returned by the second terminal may be received based on the data link. The second uplink data packet has the same content as the first uplink data packet, so that the second downlink data packet should ideally have the same content as the first downlink data packet. But in some situations (e.g., where the network environment is poor), the integrity of the first downstream data may be affected, such as where a data block is missing.
In some embodiments, the second upstream data packet may be a duplicate of the first upstream data packet. For example, before sending a second uplink data packet to the second terminal based on the data link, the first uplink data packet may be duplicated to obtain a duplicated uplink data packet, and then the duplicated uplink data packet is sent to the second SIM card, so that the second SIM card takes the duplicated uplink data packet as the second uplink data packet and sends the duplicated uplink data packet.
In step S104, call content of the video call is determined based on the first downlink data packet and the second downlink data packet.
In this embodiment, after a second uplink data packet is sent to the second terminal based on the data link, and a second downlink data packet returned by the second terminal is received based on the data link, call content of the video call may be determined based on the first downlink data packet and the second downlink data packet.
In some implementations, a target downstream data packet may be determined based on the first downstream data packet and the second downstream data packet, and call content of the video call may be parsed based on the target downstream data packet.
The call content of the video call analyzed based on the target downlink packet may include an image and/or a sound of the video call, which is not limited in this embodiment.
In some embodiments, when determining the target downstream data packet based on the first downstream data packet and the second downstream data packet, the missing data packet in the first downstream data packet may be filled with the data packet based on the target SEQ serial number in the second downstream data packet in response to the missing data packet in the first downstream data packet, so as to obtain the target downstream data packet.
That is, when the first terminal receives the DLvideo RTP packets of the two links (i.e., the video dedicated bearer of the first SIM card and the data link of the second SIM card), the data packet of the first SIM card may be preferentially selected, and when detecting that there is a missing (discontinuous) SEQ serial Number in the DLvideo RTP packet received by the first SIM card, the data packet corresponding to the SEQ serial Number received by the data link of the second SIM card may be read to be filled, so as to combine the data packets from the two links into a target downlink data packet, and parse the data packet. It can be appreciated that the specific manner of parsing the target downstream packet may be referred to in the related art, which is not limited in this embodiment.
As can be seen from the foregoing description, in the method of the embodiment, by responding to the video call with the second terminal through the video dedicated bearer of the first SIM card, sending a first uplink data packet to the second terminal based on the video dedicated bearer, receiving a first downlink data packet returned by the second terminal based on the video dedicated bearer, then responding to the uplink data sending quality of the first SIM card to meet a set sending quality condition, and the second SIM card to meet a data link establishment condition, establishing a data link based on the second SIM card and the second terminal, and sending a second uplink data packet to the second terminal based on the data link, receiving a second downlink data packet returned by the second terminal based on the data link, where the content of the second uplink data packet is the same as that of the first uplink data packet, and further determining the call content of the video call based on the first downlink data packet and the second downlink data packet.
Fig. 2 is a flowchart showing how it is determined that the signal quality of the second SIM card satisfies the set signal quality condition according to an exemplary embodiment of the present disclosure; the present embodiment is exemplified on the basis of the above-described embodiments by taking as an example how it is determined that the signal quality of the second SIM card satisfies the set signal quality condition.
As shown in fig. 2, the video call method of the present embodiment may further include determining that the signal quality of the second SIM card meets the set signal quality condition based on the following steps S201 to S202:
in step S201, a signal quality index value of the second SIM card is detected.
In this embodiment, when detecting whether the signal quality of the second SIM card meets the set signal quality condition, the signal quality index value of the second SIM card may be detected.
It should be noted that the signal quality index value may be set based on the requirements of the actual scenario, for example, set to be the reference signal received power RSRP and/or the signal-to-noise ratio SNR, which is not limited in this embodiment.
In other embodiments, in order to improve the stability of detecting the signal quality index value of the second SIM card, the signal quality index value of the second SIM card may be continuously detected multiple times, and an average value of the multiple detected signal quality index values may be determined as the target detection result. For example, the signal quality index value of the second SIM card may be detected once per unit time (e.g., per second) and continuously detected 3 times.
In step S202, in response to the signal quality index value reaching a set index threshold, it is determined that the signal quality of the second SIM card satisfies the set signal quality condition.
In this embodiment, after the signal quality index value of the second SIM card is detected, the signal quality index value may be compared with a set index threshold, so that when the signal quality index value reaches the set index threshold (i.e., the signal quality index value is greater than or equal to the set index threshold), it may be determined that the signal quality of the second SIM card meets the set signal quality condition.
As can be seen from the foregoing description, in this embodiment, by detecting the signal quality index value of the second SIM card, where the signal quality index value includes a reference signal received power RSRP and/or a signal-to-noise ratio SNR, and determining that the signal quality of the second SIM card meets the set signal quality condition in response to the signal quality index value reaching a set index threshold, it may be possible to accurately determine that the signal quality of the second SIM card meets the set signal quality condition, and further, it may be possible to implement subsequent transmission of a dual-link data packet that is received by the second SIM card and that meets the set signal quality condition in response to the signal quality of the second SIM card, and the second SIM card is an uplink card of the first terminal, and determine that the second SIM card meets the data link establishment condition, so that a data link may be established based on the second SIM card and the second terminal, and a second uplink data packet may be sent to the second terminal based on the data link, and a dual-link data packet returned by the second terminal may be implemented, which may be possible to solve the problem that the video dedicated bearer and the data link may be lost due to poor network environment may be avoided, and the problem of having poor call quality may be solved.
Fig. 3 is a flow chart illustrating how a data link is established with the second terminal based on the second SIM card according to an exemplary embodiment of the present disclosure; the present embodiment is exemplified on the basis of the above-described embodiments by taking as an example how to establish a data link with the second terminal based on the second SIM card.
In this embodiment, the data link may include a first sub-link and a second sub-link, where the first sub-link may be a connection link between the second SIM card and the target server, and the second sub-link may be a connection link between the target server and the second terminal. Illustratively, the target server may include a network address translation NAT (Network Address Translation ) server previously set up on the public network, that is, the target server has a public network IP address.
On this basis, as shown in fig. 3, the step S102 of establishing a data link with the second terminal based on the second SIM card may include the following steps S301 to S302:
in step S301, the second SIM card is connected to the target server to obtain the first sub-link.
In this embodiment, when a data link is established between the second SIM card and the second terminal, the second SIM card may be connected to the target server, that is, a client corresponding to the second SIM card is connected to the target server, so as to obtain the first sub-link.
For example, when the client corresponding to the second SIM card is connected to the target server (e.g., NAT server), a network protocol (e.g., TCP or UDP protocol) may be used on the first terminal to establish a connection with the NAT server, i.e., the first terminal may connect with the NAT server through the IP address and port number of the NAT server stored in advance.
In step S302, in response to the first sub-link being obtained, terminal information of the second terminal is sent to the target server, so as to request the target server to establish connection with the second terminal, and obtain the second sub-link.
In this embodiment, after the second SIM card is connected to the target server, the terminal information of the second terminal may be sent to the target server in response to obtaining the first sub-link, so as to request the target server to establish connection with the second terminal, so as to obtain the second sub-link.
The terminal information may include, but is not limited to, an IP address of the second terminal.
Taking the target server as the NAT server, after the second SIM card is connected to the target server, the first terminal may notify the NAT server of which device (i.e., the second terminal) needs to be connected to, that is, notify the NAT server of information such as an IP address of the second terminal, so as to request the target server to establish connection with the second terminal.
On the basis, after the NAT server receives the data forwarding request of the first terminal, the data can be forwarded to the target equipment, namely the second terminal, based on the corresponding network configuration and forwarding rule setting; further, after the target second terminal receives the data packet from the NAT server, the target second terminal may send the response data to the first terminal through the NAT server. In this way, the first terminal and the second terminal can realize two-way communication.
As can be seen from the foregoing description, in this embodiment, the second SIM card is connected to the target service end to obtain the first sub-link, and in response to obtaining the first sub-link, terminal information of the second terminal is sent to the target service end, so as to request the target service end to establish connection with the second terminal to obtain the second sub-link, so that a data link can be established based on the second SIM card and the second terminal, further, a second uplink data packet can be sent to the second terminal based on the data link, and a second downlink data packet returned by the second terminal is received based on the data link, so that the problem that a video packet is easy to lose due to degradation of a network environment can be solved, the problems of video call blocking, mosaic, and the like can be solved, and the video call quality can be effectively improved.
The following describes the video call method of the present disclosure in a specific embodiment, but is not intended to limit the scope of the present disclosure.
FIG. 4 is a flow chart illustrating a video call method according to yet another exemplary embodiment of the present disclosure; as shown in fig. 4, the video call method of the present embodiment may include the following steps S401 to S413:
in step S401, the first terminal sends a video call request to the second terminal through the first SIM card based on the IP multimedia system IMS;
in step S402, the first terminal establishes a video dedicated bearer in response to receiving response information returned by the second terminal based on the video call request;
in step S403, it is proposed that the video dedicated bearer establishes a video call between the first terminal and the second terminal;
in step S404, the first terminal sends a first UL Video RTP packet to the second terminal based on the Video dedicated bearer, and receives a first DL Video RTP packet returned by the second terminal based on the Video dedicated bearer;
in step S405, it is determined whether the uplink block error rate ULBLER of the first SIM card is smaller than a set block error rate threshold (e.g., 10%): if not, executing S406; if yes, then execution S412;
In step S406, the reference signal received power RSRP and the signal-to-noise ratio SNR of the second SIM card are detected three times in succession;
in step S407, it is determined whether the RSRP is greater than a preset power threshold (e.g., -105), and the SNR is greater than a set proportion threshold (e.g., 0): if yes, then execute S408; if not, then S412 is performed;
that is, the present embodiment continuously collects RSRP and SNR three times (once per second), and when the values of the RSRP and SNR three times each meet the requirements, the signal environment of the second SIM card can be considered to be good and stable as a basis for establishing a data link below.
In step S408, it is determined whether the second SIM card is an internet card of the first terminal: if not, executing S409; if yes, then execute S410;
in step S409, setting the second SIM card as an internet card of the first terminal;
in step S410, a data link is established with the second terminal based on the second SIM card;
in step S411, a second UL Video RTP packet is sent to the second terminal based on the data link, and a second DL Video RTP packet returned by the second terminal is received based on the data link;
the second UL Video RTP packet can be obtained by copying the first UL Video RTP packet.
In step S412, determining call content of the video call based on the first downlink data packet and the second downlink data packet;
in step S413, in response to the first terminal or the second terminal hanging up the video, the video call is ended.
As can be seen from the above description, in this embodiment, when the ul bler threshold is set during the Video call of the first SIM card, when the ul bler threshold exceeds 10%, the problem of Video blocking is considered to occur easily, so that the mechanism for performing Video data transmission based on the data link of the second SIM card is triggered, and by continuously collecting RSRP and SNR three times, when the values of RSRP and SNR three times meet the requirements, the signal environment of the second SIM card is considered to be good and stable, so as to lay a foundation for establishing the data link later, further, after determining that the second SIM card is the network card of the first terminal and establishing the data link, receiving and transmitting Video RTP packets based on the data link, thereby realizing the double-link data transmission of the dedicated Video bearer and the data link, solving the problem that the Video packets are easy to be lost due to the degradation of the network environment, avoiding the problems of Video blocking, mosaic, and the like, and effectively improving the Video call quality.
Fig. 5 is a flow chart illustrating how the video-specific bearer is established according to an exemplary embodiment of the present disclosure; the present embodiment is exemplified on the basis of the above-described embodiments by taking as an example how to set up the video-dedicated bearer.
As shown in fig. 5, the video call method of the present embodiment may further include establishing the video dedicated bearer based on the following steps S501 to S502:
in step S501, a video call request is sent to the second terminal based on the IP multimedia system IMS through the first SIM card.
In this embodiment, when the first terminal performs video call with the second terminal based on the first SIM card, a video call request may be sent to the second terminal through the first SIM card based on the IP multimedia system IMS.
For example, after the first terminal inserts the dual card and enters the dual card dual active DSDA mode, the first SIM card may initiate a video call request to the second terminal based on the IP multimedia system (IP Multimedia Subsystem, detect IMS).
In step S502, in response to receiving response information returned by the second terminal based on the video call request, the video dedicated bearer is established.
In this embodiment, after a video call request is sent to the second terminal through the first SIM card based on the IP multimedia system IMS, the second terminal may return corresponding response information to the first terminal based on the video call request, and further the first terminal may establish the video dedicated bearer in response to receiving the response information returned by the second terminal based on the video call request, and on this basis, may establish a video call between the first terminal and the second terminal based on the video dedicated bearer.
As can be seen from the foregoing description, in this embodiment, through the first SIM card, the video call request is sent to the second terminal based on the IP multimedia system IMS, and the video dedicated bearer is established in response to receiving the response information returned by the second terminal based on the video call request, so that the subsequent problem that the video packet is easily lost due to the degradation of the network environment, such as the video call is blocked and the mosaic, can be solved, and the video call quality can be effectively improved by combining the subsequent operations of sending the second uplink packet to the second terminal based on the data link and receiving the second downlink packet returned by the second terminal based on the data link.
FIG. 6 is a block diagram of a video telephony apparatus in accordance with an exemplary embodiment of the present disclosure; the device of the embodiment can be configured in a terminal device supporting a plurality of SIM cards, such as a mobile phone, a smart watch, a tablet computer and the like, wherein the plurality of SIM cards comprise a first SIM card and a second SIM card. Specifically, as shown in fig. 6, the apparatus may include: a dedicated bearer transceiver module 110, a data link establishment module 120, a data link transceiver module 130, and a talk content determination module 140, wherein:
A dedicated bearer transceiver module 110, configured to respond to a video call with a second terminal through a video dedicated bearer of the first SIM card, send a first uplink data packet to the second terminal based on the video dedicated bearer, and receive a first downlink data packet returned by the second terminal based on the video dedicated bearer;
a data link establishment module 120, configured to establish a data link with the second terminal based on the second SIM card in response to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and the second SIM card meeting a data link establishment condition;
a data link transceiver module 130, configured to send a second uplink data packet to the second terminal based on the data link, and receive a second downlink data packet returned by the second terminal based on the data link, where the second uplink data packet has the same content as the first uplink data packet;
and a call content determining module 140, configured to determine call content of the video call based on the first downlink data packet and the second downlink data packet.
As can be seen from the foregoing description, in the device of this embodiment, by responding to a video dedicated bearer passing through a first SIM card to perform a video call with a second terminal, sending a first uplink data packet to the second terminal based on the video dedicated bearer, receiving a first downlink data packet returned by the second terminal based on the video dedicated bearer, then responding to the uplink data sending quality of the first SIM card to meet a set sending quality condition, and the second SIM card to meet a data link establishment condition, establishing a data link based on the second SIM card and the second terminal, and sending a second uplink data packet to the second terminal based on the data link, receiving a second downlink data packet returned by the second terminal based on the data link, where the content of the second uplink data packet is the same as that of the first uplink data packet, and further determining the call content of the video call based on the first downlink data packet and the second downlink data packet.
FIG. 7 is a block diagram of yet another video telephony apparatus in accordance with an exemplary embodiment of the present disclosure; the device of the embodiment can be configured in a terminal device supporting a plurality of SIM cards, such as a mobile phone, a smart watch, a tablet computer and the like, wherein the plurality of SIM cards comprise a first SIM card and a second SIM card. The dedicated bearer transceiver module 210, the data link establishment module 220, the data link transceiver module 230, and the call content determination module 240 are the same as the dedicated bearer transceiver module 110, the data link establishment module 120, the data link transceiver module 130, and the call content determination module 140 in the embodiment shown in fig. 6, and are not described herein.
As shown in fig. 7, the apparatus may further include:
the transmission quality determining module 250 is configured to determine that the uplink data transmission quality of the first SIM card meets the set transmission quality condition in response to the uplink block error rate BLER of the first SIM card being greater than or equal to a set block error rate threshold.
In some embodiments, the apparatus may further include:
the establishment condition determining module 260 is configured to determine that the second SIM card meets the data link establishment condition in response to the signal quality of the second SIM card meeting a set signal quality condition, where the second SIM card is an internet card of the first terminal.
In some embodiments, the establishment condition determination module 260 may further include:
an index value detection unit 261, configured to detect a signal quality index value of the second SIM card, where the signal quality index value includes a reference signal received power RSRP and/or a signal-to-noise ratio SNR;
and a signal quality determining unit 262, configured to determine that the signal quality of the second SIM card meets the set signal quality condition in response to the signal quality index value reaching a set index threshold.
In some embodiments, the data link may include a first sub-link and a second sub-link, where the first sub-link is a connection link between the second SIM card and a target server, and the second sub-link is a connection link between the target server and the second terminal, and the target server may include a network address translation NAT server that is built on a public network in advance;
further, the data link establishment module 220 may include:
a first link unit 221, configured to connect the second SIM card with the target server to obtain the first sub-link;
and the second link unit 222 is configured to send, in response to the first sub-link being obtained, terminal information of the second terminal to the target service end, so as to request the target service end to establish a connection with the second terminal, so as to obtain the second sub-link, where the terminal information includes an IP address of the second terminal.
In some embodiments, the apparatus may further include a data replication transmission module 270;
the data replication and transmission module 270 may include:
a data replication unit 271, configured to replicate the first uplink data packet to obtain a replicated uplink data packet;
and a data sending unit 272, configured to send the duplicate uplink data packet to the second SIM card, so that the second SIM card uses the duplicate uplink data packet as the second uplink data packet, and perform the operation of sending the second uplink data packet to the second terminal based on the data link.
In some embodiments, the foregoing call content determining module 240 may be further configured to:
responding to the data packet with the target SEQ serial number missing in the first downlink data packet, and filling the data packet missing in the first downlink data packet based on the data packet with the target SEQ serial number in the second downlink data packet to obtain the target downlink data packet;
and analyzing the call content of the video call based on the target downlink data packet.
In some embodiments, the apparatus may further include: a dedicated bearer establishment module 280;
dedicated bearer establishment module 280 may include:
A call request sending unit 281, configured to send, through the first SIM card, a video call request to the second terminal based on an IP multimedia system IMS;
and the dedicated bearer establishment unit 282 is configured to establish the video dedicated bearer in response to receiving response information returned by the second terminal based on the video call request.
The specific manner in which the various modules perform the operations in the apparatus of the above embodiments have been described in detail in connection with the embodiments of the method, and will not be described in detail herein.
Fig. 8 is a block diagram of a terminal device according to an exemplary embodiment. For example, device 900 may be a mobile phone, computer, digital broadcast terminal, messaging device, game console, tablet device, medical device, exercise device, personal digital assistant, and the like.
Referring to fig. 8, device 900 may include one or more of the following components: a processing component 902, a memory 904, a power component 906, a multimedia component 908, an audio component 910, an input/output (I/O) interface 912, a sensor component 914, and a communication component 916.
The processing component 902 generally controls overall operation of the device 900, such as operations associated with display, telephone calls, data communications, camera operations, and recording operations. The processing component 902 may include one or more processors 920 to execute instructions to perform all or part of the steps of the video call method described above. Further, the processing component 902 can include one or more modules that facilitate interaction between the processing component 902 and other components. For example, the processing component 902 can include a multimedia module to facilitate interaction between the multimedia component 908 and the processing component 902.
The memory 904 is configured to store various types of data to support operations at the device 900. Examples of such data include instructions for any application or method operating on device 900, contact data, phonebook data, messages, pictures, videos, and the like. The memory 904 may be implemented by any type of volatile or nonvolatile memory device or combination thereof, such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk.
The power supply component 906 provides power to the various components of the device 900. Power supply components 906 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power for device 900.
The multimedia component 908 comprises a screen between the device 900 and the user that provides an output interface. In some embodiments, the screen may include a liquid crystal display panel and a Touch Panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from a user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensor may sense not only the boundary of a touch or slide action, but also the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 908 includes a front-facing camera and/or a rear-facing camera. The front-facing camera and/or the rear-facing camera may receive external multimedia data when the device 900 is in an operational mode, such as a shooting mode or a video mode. Each front camera and rear camera may be a fixed optical lens system or have focal length and optical zoom capabilities.
The audio component 910 is configured to output and/or input audio signals. For example, the audio component 910 includes a Microphone (MIC) configured to receive external audio signals when the device 900 is in an operational mode, such as a call mode, a recording mode, and a voice recognition mode. The received audio signals may be further stored in the memory 904 or transmitted via the communication component 916. In some embodiments, the audio component 910 further includes a speaker for outputting audio signals.
The I/O interface 912 provides an interface between the processing component 902 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to: homepage button, volume button, start button, and lock button.
The sensor assembly 914 includes one or more sensors for providing status assessment of various aspects of the device 900. For example, the sensor assembly 914 may detect the on/off state of the device 900, the relative positioning of the components, such as the display panel and keypad of the device 900, the sensor assembly 914 may also detect the change in position of the device 900 or one component of the device 900, the presence or absence of user contact with the device 900, the orientation or acceleration/deceleration of the device 900, and the change in temperature of the device 900. The sensor assembly 914 may also include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 914 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 914 may also include an acceleration sensor, a gyroscopic sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.
The communication component 916 is configured to facilitate communication between the device 900 and other devices, either wired or wireless. The device 900 may access a wireless network based on a communication standard, such as WiFi,2G or 3G,4G or 5G, or a combination thereof. In one exemplary embodiment, the communication component 916 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 916 further includes a Near Field Communication (NFC) module to facilitate short range communications. For example, the NFC module may be implemented based on Radio Frequency Identification (RFID) technology, infrared data association (IrDA) technology, ultra Wideband (UWB) technology, bluetooth (BT) technology, and other technologies.
In an exemplary embodiment, the apparatus 900 may be implemented by one or more Application Specific Integrated Circuits (ASICs), digital Signal Processors (DSPs), digital Signal Processing Devices (DSPDs), programmable Logic Devices (PLDs), field Programmable Gate Arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components for performing the video telephony methods described above.
In an exemplary embodiment, a non-transitory computer readable storage medium is also provided, such as a memory 904 including instructions executable by the processor 920 of the device 900 to perform the video call method described above. For example, the non-transitory computer readable storage medium may be ROM, random Access Memory (RAM), CD-ROM, magnetic tape, floppy disk, optical data storage device, etc.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This disclosure is intended to cover any adaptations, uses, or adaptations of the disclosure following the general principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It is to be understood that the present disclosure is not limited to the precise arrangements and instrumentalities shown in the drawings, and that various modifications and changes may be effected without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. A video call method, applied to a first terminal supporting a plurality of subscriber identity modules, SIM cards, the plurality of SIM cards including a first SIM card and a second SIM card, the method comprising:
responding to video call with a second terminal through a video special bearer of the first SIM card, sending a first uplink data packet to the second terminal based on the video special bearer, and receiving a first downlink data packet returned by the second terminal based on the video special bearer;
Responding to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and the second SIM card meeting a data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
and determining call content of the video call based on the first downlink data packet and the second downlink data packet.
2. The method according to claim 1, wherein the method further comprises:
and determining that the uplink data transmission quality of the first SIM card meets the set transmission quality condition in response to the uplink block error rate BLER of the first SIM card being greater than or equal to a set block error rate threshold.
3. The method according to claim 1, wherein the method further comprises:
and responding to the signal quality of the second SIM card meeting the set signal quality condition, and determining that the second SIM card meets the data link establishment condition for the network card of the first terminal.
4. A method according to claim 3, characterized in that the method further comprises:
detecting a signal quality index value of the second SIM card, wherein the signal quality index value comprises Reference Signal Received Power (RSRP) and/or signal-to-noise ratio (SNR);
and determining that the signal quality of the second SIM card meets the set signal quality condition in response to the signal quality index value reaching a set index threshold.
5. The method of claim 1, wherein the data link comprises a first sub-link and a second sub-link, the first sub-link being a connection link between the second SIM card and a target server, the second sub-link being a connection link between the target server and the second terminal, the target server comprising a network address translation NAT server previously built on a public network;
the establishing a data link with the second terminal based on the second SIM card comprises the following steps:
connecting the second SIM card with the target server to obtain the first sub-link;
and transmitting terminal information of the second terminal to the target service end in response to the first sub-link, so as to request the target service end to establish connection with the second terminal, and obtaining the second sub-link, wherein the terminal information comprises an IP address of the second terminal.
6. The method according to claim 1, wherein the method further comprises:
copying the first uplink data packet to obtain a copied uplink data packet;
and sending the duplicate uplink data packet to the second SIM card, so that the second SIM card takes the duplicate uplink data packet as the second uplink data packet, and the operation of sending the second uplink data packet to the second terminal based on the data link is executed.
7. The method of claim 1, wherein determining the call content of the video call based on the first downstream data packet and the second downstream data packet comprises:
responding to the data packet with the target SEQ serial number missing in the first downlink data packet, and filling the data packet missing in the first downlink data packet based on the data packet with the target SEQ serial number in the second downlink data packet to obtain the target downlink data packet;
and analyzing the call content of the video call based on the target downlink data packet.
8. The method according to claim 1, wherein the method further comprises:
transmitting a video call request to the second terminal based on an IP multimedia system IMS through the first SIM card;
And establishing the video special bearer in response to receiving response information returned by the second terminal based on the video call request.
9. A video telephony device for use with a first terminal supporting a plurality of SIM cards, the plurality of SIM cards including a first SIM card and a second SIM card, the device comprising:
the special bearing receiving and transmitting module is used for responding to video call with a second terminal through a video special bearing of the first SIM card, sending a first uplink data packet to the second terminal based on the video special bearing, and receiving a first downlink data packet returned by the second terminal based on the video special bearing;
the data link establishment module is used for responding to the condition that the uplink data transmission quality of the first SIM card meets the set transmission quality, and the second SIM card meets the data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
the data link transceiver module is used for transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
And the call content determining module is used for determining the call content of the video call based on the first downlink data packet and the second downlink data packet.
10. A terminal device, wherein the device supports a plurality of SIM cards, the plurality of SIM cards including a first SIM card and a second SIM card, the device comprising:
a processor and a memory for storing a computer program;
wherein the processor is configured to implement, when executing the computer program:
responding to video call with a second terminal through a video special bearer of the first SIM card, sending a first uplink data packet to the second terminal based on the video special bearer, and receiving a first downlink data packet returned by the second terminal based on the video special bearer;
responding to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and the second SIM card meeting a data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
And determining call content of the video call based on the first downlink data packet and the second downlink data packet.
11. A computer readable storage medium having stored thereon a computer program, the program being embodied when executed by a processor:
responding to video call with a second terminal through a video special bearer of a first SIM card, sending a first uplink data packet to the second terminal based on the video special bearer, and receiving a first downlink data packet returned by the second terminal based on the video special bearer;
responding to the uplink data transmission quality of the first SIM card meeting a set transmission quality condition, and a second SIM card meeting a data link establishment condition, and establishing a data link with the second terminal based on the second SIM card;
transmitting a second uplink data packet to the second terminal based on the data link, and receiving a second downlink data packet returned by the second terminal based on the data link, wherein the second uplink data packet has the same content as the first uplink data packet;
and determining call content of the video call based on the first downlink data packet and the second downlink data packet.
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