CN111065058B - Video group calling method, terminal and network system - Google Patents
Video group calling method, terminal and network system Download PDFInfo
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- CN111065058B CN111065058B CN201811200503.8A CN201811200503A CN111065058B CN 111065058 B CN111065058 B CN 111065058B CN 201811200503 A CN201811200503 A CN 201811200503A CN 111065058 B CN111065058 B CN 111065058B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
Abstract
The invention provides a video group calling method, which comprises the following steps: the terminal sends a first request and a response message to the core network in sequence so as to establish a unicast bearer between the core network and the terminal, wherein the first request at least comprises: terminal address information; the terminal receives a second instruction sent by the core network so as to establish video group calling between the dispatching desk and the terminal; wherein, the second instruction at least comprises: the system comprises core network address information, a unicast-loaded data receiving address is terminal address information, a unicast-loaded data sending address is core network address information, a second instruction is used for responding to a second request, the second request is sent by a dispatching desk, and participants of the video group call change along with the movement of the terminal position; when the terminal determines that the data received in the video group call is lost, the terminal receives the compensation data sent by the core network corresponding to the core network address information through unicast bearing so as to compensate the data lost by the terminal in the video group call, improve the service quality and reduce the occupation of an air interface.
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a video group call method, a terminal, and a network system.
Background
The cluster system not only can provide the functions of voice, short-distance data communication and the like, but also can provide video image services, thereby providing more visual and rich multimedia information services for users. The video group call service of the trunking system may send the specified video to all user terminals of the selected talk group.
Since the video group call does not require user terminal feedback, the quality of the signal that users at the cell edge may receive is poor. In order to improve the signal quality at the cell edge, a method of allocating more air interface resources or adopting low order modulation is generally adopted.
It can be seen that the method for improving the cell edge signal quality will undoubtedly increase the occupation of air interface resources, and further cause the air interface resources in the cluster system to be in short supply.
Disclosure of Invention
The invention provides a video group calling method, a terminal and a network system, which aim to solve the technical problem that the occupation of air interface resources is increased by adopting the method for improving the cell edge signal quality in the prior art, and further the air interface resources in a cluster system are deficient.
In a first aspect, the present invention provides a video group call method, which is applied to a network system, where the network system at least includes a terminal, a scheduling station, and a core network, and the method includes: the terminal sends a first request and a response message to the core network in sequence so as to establish a unicast bearer between the core network and the terminal, wherein the first request at least comprises: terminal address information; the terminal receives a second instruction sent by the core network so as to establish video group calling between the dispatching desk and the terminal; wherein, the second instruction at least comprises: the system comprises core network address information, a unicast-loaded data receiving address is terminal address information, a unicast-loaded data sending address is core network address information, a second instruction is used for responding to a second request, the second request is sent by a dispatching desk, and participants of the video group call change along with the movement of the terminal position; when the terminal determines that the data received in the video group call is lost, the terminal receives compensation data sent by a core network corresponding to the core network address information through unicast load so as to compensate the data lost by the terminal in the video group call.
In the video group call method provided by the invention, a unicast bearer is established between a terminal and a core network which are positioned outside the coverage range of a base station, so that when the terminal determines that data received in the video group call is lost, the terminal receives compensation data sent by the core network through the unicast bearer to compensate the data lost by the terminal in the video group call, the service quality of the terminal is improved, and the occupation of air interface resources is reduced.
Optionally, after receiving the second instruction, the method further includes: a terminal acquires core network address information and flow control parameters; wherein, the second instruction further comprises: the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameters; the terminal judges whether the flow control parameter is larger than the preset flow; and if so, the terminal sends a data compensation request to the core network corresponding to the core network address information, so that the core network sends compensation data to the terminal to compensate the data lost by the terminal in the video group call.
In the video group calling method provided by the invention, only terminal address information is provided when a unicast bearer is established, namely the unicast bearer and the terminal have a corresponding relation, the core network address information is acquired after the video multicast is established, when the terminal loses data in the video group calling process, a data compensation request can be sent to a corresponding core network by using the acquired core network address information, and the core network provides compensation data to the corresponding terminal. Because the terminal has mobility, the core network signed with the terminal changes along with the movement of the terminal, and the communication scene of the terminal and different core networks can be adapted by acquiring the address information of the core network after the video group call is established.
Optionally, the data compensation request includes at least: data loss information and terminal address information; wherein the lost data information is used to enable the core network to obtain the compensation data.
In the video group calling method provided by the invention, the core network receiving the data compensation request is determined according to the acquired terminal address information and the existing core network address information, and the core network determines the terminal receiving the compensation data through the received terminal address information. And determining a lost data packet according to the data loss information, and determining compensation data by the core network according to the lost data packet. So as to improve the service quality of the terminal and reduce the occupation of air interface resources.
In a second aspect, the present invention provides a video group call method, where a core network receives a first request and sends a first instruction to a terminal, where the first instruction is used to respond to the first request, so as to establish a unicast bearer between the core network and the terminal, and the first request at least includes: terminal address information; the core network receives the second request and sends a second instruction to the terminal; the second instruction is used for responding to a second request to establish a video group call between the dispatching desk and the terminal, the second request is sent by the dispatching desk, and the second instruction at least comprises: the method comprises the steps that core network address information is adopted, a unicast-borne data sending address is the core network address information, a unicast-borne data receiving address is terminal address information, and participants in the video group call change along with the movement of the terminal position; when the terminal determines that the data received in the video group call is lost, the core network sends compensation data to the terminal through unicast load so as to compensate the data lost by the terminal in the video group call.
In the video group calling method provided by the invention, a first request sent by a terminal is received, the terminal needing to establish the unicast bearing is determined according to the terminal address information in the first request, the unicast bearing between the terminal and a core network is established, and further, the data compensation of the terminal with data loss by utilizing the unicast bearing is realized in the process of carrying out the video group calling. When the core network sends a video group call establishing instruction, the core network address information is sent to the terminal, so that the terminal mobility can be adapted, the data sending address is determined when unicast bearing is utilized, and the service quality of the terminal is improved.
Optionally, after the core network receives the second request and sends the second instruction, the method further includes: the core network receives the data compensation request, and after acquiring compensation data according to the data loss information in the data compensation request, the core network sends the compensation data to a terminal corresponding to the terminal address information in the data compensation request so as to compensate the data lost by the terminal in the video group call; wherein the second instructions further comprise: and the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameter, and when the flow control parameter is larger than the preset flow, the terminal sends a data compensation request.
In the video group calling method provided by the invention, when the flow control parameter is larger than the preset flow, the terminal sends the data compensation request, so that the influence on the communication of other equipment in the process of carrying out data compensation on the terminal by utilizing unicast load can be avoided. The core network can quickly acquire the compensation data according to the data loss information in the data compensation request, and transmits the compensation data to the corresponding terminal according to the acquired terminal address information, so that the service quality of the terminal is improved.
The following describes a terminal, which implements principles and technical effects similar to those of the above method, and is not described herein again.
In a third aspect, the present invention provides a terminal, where the first sending module is configured to send a first request and a response message in sequence, so as to establish a unicast bearer between a core network and the terminal, where the first request at least includes: terminal address information; the first receiving module is used for receiving a second instruction sent by the core network so as to establish the video group call between the dispatching desk and the terminal; wherein, the second instruction at least comprises: the system comprises core network address information, a unicast-loaded data receiving address is terminal address information, a unicast-loaded data sending address is core network address information, a second instruction is used for responding to a second request, the second request is sent by a dispatching desk, and participants of the video group call change along with the movement of the terminal position; when the terminal determines that the data received in the video group call is lost, the terminal receives compensation data sent by a core network corresponding to the core network address information through unicast load so as to compensate the data lost by the terminal in the video group call.
Optionally, the method further comprises: the acquisition module is used for acquiring core network address information and flow control parameters; the judging module is used for judging whether the flow control parameter is larger than the preset flow; wherein, the second instruction further comprises: the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameters; the second sending module is used for sending a data compensation request when the judgment result is yes, so that the core network sends compensation data to the terminal to compensate the data lost by the terminal in the video group call; wherein, the receiving address of the data compensation request is the address information of the core network.
The core network is described below, and the implementation principle and technical effect thereof are similar to those of the above method, and are not described herein again.
In a fourth aspect, the present invention provides a core network, including: a second receiving module, configured to receive a first request and send a first instruction, where the first instruction is used to respond to the first request, so as to establish a unicast bearer between a core network and a terminal, and the first request at least includes: terminal address information; the third receiving module is used for receiving the second request and sending a second instruction; the second instruction is used for responding to a second request to establish a video group call between the dispatching desk and the terminal, the second request is sent by the dispatching desk, and the second instruction at least comprises: the method comprises the steps that core network address information is adopted, a unicast-borne data sending address is the core network address information, a unicast-borne data receiving address is terminal address information, and participants in the video group call change along with the movement of the terminal position; when the data received in the video group call is lost, compensation data is sent through unicast load to compensate the data lost by the terminal in the video group call.
Optionally, the method further comprises: the fourth receiving module is used for receiving the data compensation request, and sending the compensation data to the terminal corresponding to the terminal address information in the data compensation request after the compensation data is acquired according to the data loss information in the data compensation request so as to compensate the data lost by the terminal in the video group call; wherein the second instructions further comprise: and the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameter, and when the flow control parameter is larger than the preset flow, the terminal sends a data compensation request.
The network system is described below, and the implementation principle and technical effect thereof are similar to those of the above method, and are not described herein again.
In a fifth aspect, the present invention provides a network system, comprising the terminal according to the third aspect and optional aspects and the core network according to the fourth aspect and optional aspects.
According to the video group call method, the device and the network system, the unicast bearer is established between the terminal and the core network which are positioned outside the coverage range of the base station, so that when the terminal determines that the data received in the video group call is lost, the terminal receives the compensation data sent by the core network through the unicast bearer to compensate the data lost by the terminal in the video group call, the service quality of the terminal is improved, and the occupation of air interface resources is reduced. In addition, because the terminal has mobility, the core network subscribed with the terminal changes along with the movement of the terminal, and the communication scene of the terminal and different core networks can be adapted by acquiring the core network address information after the video group call is established.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a diagram illustrating an application scenario of a video group call method according to an exemplary embodiment of the present invention;
fig. 2 is a signaling interaction diagram of a video group call method based on the application scenario shown in fig. 1;
fig. 3 is a diagram illustrating an application scenario of a video group call method according to another exemplary embodiment of the present invention;
fig. 4 is a signaling interaction diagram of a video group call method based on the application scenario shown in fig. 3;
fig. 5 is a schematic diagram of a terminal shown in accordance with an example embodiment;
fig. 6 is a schematic diagram illustrating a core network structure according to an example embodiment.
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 some, but not all, embodiments of the present invention. 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.
Fig. 1 is a view of an application scenario of a video group call method according to an exemplary embodiment of the present invention, and as shown in fig. 1, the video group call method provided in this embodiment is applied to a network system, where the network system includes a core network 200, a terminal 110, a scheduling station 120, and a base station 300. The core network 200 communicates with the terminal 110 and the scheduling station 120 via the base station 300.
Fig. 2 is a signaling interaction diagram of a video group call method based on the application scenario shown in fig. 1. As shown in fig. 2, the video group call method provided in this embodiment is based on the network system shown in fig. 1, and includes:
s101, the terminal sends a first request.
More specifically, the terminal sends a first request to the core network. The first request is for requesting establishment of a unicast bearer for establishing the unicast bearer between the terminal 110 and the core network 200. Wherein, the first request comprises: terminal address information and bearer parameter information. The terminal address information includes an IP and a port number of the terminal. The bearer parameter information includes a type of the unicast bearer, a Quality of Service Class Identifier (QCI) of the unicast bearer, and a rate of the unicast bearer. The unicast bearer type may be a default bearer or a dedicated bearer.
Any terminal in the power-on state may send the first request to the core network, or when the terminal has the authority to establish the unicast bearer, the terminal may also send the first request to the core network. In the first request, the data receiving address of the unicast bearer is the terminal address information, and determines whether the unicast bearer between the terminal 110 and the core network 200 is a default bearer or a dedicated bearer according to the unicast bearer type, and sets the unicast bearer QCI and the unicast bearer rate.
S102, the core network sends a first instruction.
More specifically, after receiving the first request, the core network 200 matches the IP address of the terminal with a suitable physical address, and sends a first instruction to the terminal in response to the first request, where the first instruction is used to establish a unicast bearer between the terminal 102 and the core network 200. Because the first request instruction only contains the terminal address information and the bearing parameter information, the established unicast bearing attribute only contains the terminal address information and does not contain the core network address information.
For the first instruction, when the first request requests to establish the default bearer, the core network indicates, according to the QCI and the rate of the unicast bearer, which default bearer is used as the unicast bearer between the terminal and the core network in the first instruction. When the first request requests to establish the special bearer, the core network sends a first instruction for activating the special bearer to the terminal, and the terminal sends and receives response information of the first instruction for activating the special bearer after receiving the first instruction for activating the special bearer.
S103, the terminal sends a response message.
More specifically, the terminal sends a response message in response to the first instruction sent by the core network, so as to establish the unicast bearer between the terminal 102 and the core network 200.
S104, the dispatching desk sends a second request.
More specifically, the dispatching station sends a second request to the core network, where the second request is used to request to establish a video group call between the terminals, that is, to establish a video group call between the dispatching station and the terminals.
And S105, the core network sends a second instruction.
More specifically, the second instruction is sent by the core network 200 to the terminal 110 and the dispatching station 120 in response to the second request. The second instruction comprises core network address information and flow control parameters. And the data transmission address of the unicast bearer is core network address information. The core network address information includes an IP and port number of the core network.
Due to the mobility of the terminal, participants in the video group call in which the terminal participates may change along with the movement of the terminal position, that is, the terminal may participate in a plurality of video group calls. In order to adapt to the mobility of the terminal, the core network address information is sent to the terminal when the video group call is established. The core network address information and the flow control parameter in the second instruction are both used for compensating the data, and after receiving the core network address information, the terminal can send a data compensation request to the corresponding core network according to the core network address information. And the terminal determines whether the data compensation request can be sent to the core network or not according to the flow control parameters. Therefore, the second instruction is used for establishing a video group call between the terminals on one hand, and is used for transmitting core network address information and core network flow control parameters required by data compensation on the other hand, so as to adapt to the mobility of the terminals.
S106, determining that the flow control parameter is larger than the preset flow.
More specifically, the terminal obtains the received core network address information and the flow control parameter according to the second instruction. The flow control parameter is used for limiting the maximum retransmission times of the compensation data when the data loss occurs, and the flow control parameter is determined according to the current operation condition of the core network. If the flow control parameter is larger than the preset flow, the core network is identified to be in an idle state, and the core network can send compensation data to the terminal with packet loss. And if the flow control parameter is smaller than the preset flow, identifying that the core network is in a busy state and cannot respond to the data compensation request sent by the terminal. And when the flow control parameter obtained from the second instruction is determined to be greater than the preset flow, the step S107 is switched to, and if the flow control parameter is less than the preset flow, the terminal sends a request to the core network.
And the core network sends a second instruction in a circulating mode at a preset period so as to update the flow control parameter. The terminal determines whether to send a data compensation request according to the received updated flow control parameters, fully utilizes the unicast bearer channel and does not influence the communication of the network system.
And S107, sending a data compensation request to the core network.
More specifically, when the terminal determines that the data received in the video group call is lost, the terminal sends a data compensation request to a core network corresponding to the core network address information. Wherein the data compensation request at least comprises: data loss information and terminal address information. The lost data information is used for notifying a lost data packet of the core network, and the terminal address information is used for notifying a terminal with data loss of the core network, so that the core network can accurately send the lost data packet to the terminal with data loss.
For the above lost data information, if Real-time Transport Protocol (RTP) is used between the core network and the terminal to transmit data, the lost data information includes a sequence number of RTP data and a synchronization source identifier in the RTP data to identify a lost data packet.
And S108, the core network receives the data compensation request and sends compensation data.
More specifically, after receiving the data compensation request, the core network determines a lost data packet according to the data loss information in the data compensation request to obtain compensation data, and then sends the compensation data to a terminal corresponding to the terminal address information in the data compensation request. For example, if a Real-time Transport Protocol (RTP) Protocol is used between the core network and the terminal to transmit data, a sequence number of RTP data and a synchronization source identifier in the RTP data are used to obtain a lost data packet, and a terminal receiving the data packet is obtained according to IP information and port information of the terminal, so as to compensate for data lost by the terminal in the video group call.
In this embodiment, the terminal sends a request for establishing a unicast bearer to the core network to establish a unicast bearer between the terminal and the core network, so that when the terminal determines that data received in the video group call is lost, the terminal receives compensation data sent by the core network through the unicast bearer to compensate the data lost by the terminal in the video group call, improve the service quality of the terminal, and reduce the occupation of air interface resources. In addition, only terminal address information is provided when the unicast bearer is established, namely the unicast bearer has a corresponding relation with the terminal, and the core network address information is acquired after the video multicast is established, so that the method can adapt to the terminal mobility and the scenes needing to be communicated with different core networks. In addition, the flow control parameter is used for controlling the number of times of sending the data compensation request by the terminal, so that the influence on the communication of other equipment in the process of carrying out data compensation on the terminal by utilizing unicast load can be avoided.
Fig. 3 is a view illustrating an application scenario of a video group call method according to another exemplary embodiment of the present invention, and as shown in fig. 3, the video group call method provided in this embodiment is applied to a network system, where the network system includes a multi-level core network 200, a first terminal 101, a second terminal 102, a third terminal 103, a fourth terminal 104, a dispatching desk 105, a first base station 301, and a second base station 302. The multi-level core network 200 includes an upper level core network 201 and a lower level core network 202. The number of terminals is not limited to 4, the number of base stations is not limited to 2, and the number of stages of the multi-stage core network 200 is not limited to 2. The upper core network 201 is a master server. The upper core network 201 communicates with the terminal 110 and the scheduling station 120 via the first base station 301. The lower core network 202 communicates with the third terminal 103, the fourth terminal 104, and the scheduling station 105 via the second base station 302.
Fig. 4 is a signaling interaction diagram of a video group call method based on the application scenario shown in fig. 3. As shown in fig. 4, the video group call method provided in this embodiment is based on the network system shown in fig. 4, and the method includes:
s101, the first terminal sends a first request.
More specifically, the first terminal obtains the right to establish the unicast bearer, and the first terminal 101 sends a first request to the upper core network 201 to request to establish the unicast bearer between the first terminal 101 and the core network 201. Wherein, the first request comprises: the IP and port number of the first terminal. The bearer parameter information includes a type of the established unicast bearer, a QCI of the unicast bearer, and a rate of the unicast bearer.
S102, the upper core network sends a first instruction.
More specifically, after receiving the first request, the upper core network 201 sends a first instruction to the first terminal 101, so as to establish a unicast bearer between the first terminal 101 and the upper core network 201.
S103, the first terminal sends response information.
More specifically, the first terminal sends a response message in response to the first instruction sent by the upper core network, so as to establish the unicast bearer between the terminal 102 and the core network 200.
S104, the dispatching desk sends a second request.
More specifically, the dispatching station 105 sends a second request to the lower core network to request to establish a video group call among the first terminal, the second terminal, the third terminal, the fourth terminal, the fifth terminal and the dispatching station.
S105, the core network sends a second instruction to establish video group calling between terminals in the network system.
More specifically, since the network system includes a multi-level core network, after receiving the second request, the core network takes the following responses in order to establish the video group call between the terminals in the network system:
s1051, the lower core network sends the third request to the upper core network.
More specifically, since the upper core network is the master server, the scheduling station 105 sends the second request to the lower core network, and the lower core network sends the second request to the upper core network, so that the upper core network initiates the second instruction to establish the video group call between the terminals.
S1052, the upper core network sends a fourth request to the lower core network.
More specifically, the third terminal 103, the fourth terminal 104 and the dispatching desk 105 communicate with the lower core network 202 through the second base station 302, and in order to establish the video group call between the terminals, the upper core network sends a third request to the lower core network, so as to respond to the second request, the lower core network sends a second instruction for establishing the video group call to the service terminal thereof.
S1053, the upper core network and the lower core network transmit the third command.
More specifically, the third instruction is transmitted by the upper core network 201 to the first terminal 101 and the second terminal 102 in response to the second request. And sending a third instruction to the third terminal 103 and the fourth terminal 104 by the lower core network 202 to respond to the third request, and finally establishing the group call downlink. The third instruction comprises core network address information and flow control parameters, wherein the core network address information comprises an IP (Internet protocol) and a port number of the core network.
S1054, the upper core network sends the fifth request.
More specifically, since the dispatching station communicates with the lower core network through the second base station, the upper core network sends a fourth request to the lower core network to establish the group call uplink.
S1055, the lower core network transmits the fourth command.
More specifically, the lower core network sends a fourth instruction to the scheduling station to respond to the fifth request and establish the group call uplink.
S1056, the upper core network sends a sixth request.
More specifically, the upper core network sends a sixth request to the lower core network, where the sixth request is used to request the lower core network to send a talk right notification to the terminals served by the lower core network, so as to complete the establishment of the video group call between the terminals.
And S1057, the lower core network and the upper core network send speaking right notification.
More specifically, the upper core network sends a talk right notification to the first terminal and the second terminal, and the lower core network sends a talk right notification to the third terminal and the fourth terminal to complete the video group call establishment.
The superior core network issues a third instruction, the superior core network requests the subordinate core network to issue the third instruction, downlink group calling comprising a first equipment terminal, a second equipment terminal, a third equipment terminal and a fourth equipment terminal is established, the superior core network requests the subordinate core network to issue a fourth instruction, and uplink group calling of the dispatching desk is established. The upper core network issues the speaking right notification, and the upper core network requests the lower core network to issue the speaking right notification, so that the video group call establishment among all terminals in the network system is realized.
And S106, the first terminal determines that the flow control parameter is larger than the preset flow.
More specifically, when it is determined that the flow control parameter in the third instruction sent by the upper core network is greater than the preset flow, the process proceeds to S107. And the superior core network sends a third instruction to the first terminal in a preset period so as to realize real-time update of the flow control parameters.
And S107, sending a data compensation request to the upper-level core network.
More specifically, when the first terminal determines that the loss of the data received in the video group call occurs, the first terminal sends a data compensation request to the upper core network. Wherein the data compensation request at least comprises: the sequence number of the RTP data, the identification of a synchronization source in the RTP data, the IP address of the first terminal, the port number of the first terminal and the number of the first terminal.
And S108, the upper core network receives the data compensation request and sends compensation data.
More specifically, the superior core network obtains the lost data packet by using the serial number of the RTP data and the synchronization source identifier in the RTP data, and determines a data compensation object according to the IP address, the port number, and the number of the first terminal, thereby implementing data compensation for the first terminal.
In this embodiment, the first terminal receives the compensation data sent by the core network through the unicast bearer, so as to compensate for the data lost by the terminal in the video group call, improve the service quality of the terminal, and reduce the occupation of air interface resources. In addition, only terminal address information is provided when unicast bearing is established, and core network address information is acquired after video multicast is established, so that the method can adapt to terminal mobility. In addition, the flow control parameter is used for controlling the times of sending the data compensation request by the terminal, so that the influence of a network system in the data compensation process can be avoided.
The following describes a terminal, which implements principles and technical effects similar to those of the above method, and is not described herein again.
Fig. 5 is a schematic diagram illustrating a structure of a terminal according to an exemplary embodiment. As shown in fig. 5, the terminal provided in this embodiment includes: a first sending module 1001, configured to send a first request and a response message in sequence, so as to establish a unicast bearer between a core network and a terminal, where the first request at least includes: and (4) terminal address information. The first receiving module 1002 is configured to receive a second instruction sent by the core network, so that a video group call is established between the scheduling station and the terminal. Wherein, the second instruction at least comprises: the video group call control method comprises core network address information, a unicast-loaded data receiving address is terminal address information, a unicast-loaded data sending address is core network address information, a second instruction is used for responding to a second request, the second request is sent by a dispatching desk, and participants of the video group call change along with the movement of the terminal position. When the terminal determines that the data received in the video group call is lost, the terminal receives compensation data sent by a core network corresponding to the core network address information through unicast load so as to compensate the data lost by the terminal in the video group call.
Optionally, the method further comprises: the obtaining module 1003 is configured to obtain core network address information and flow control parameters. The determining module 1004 is configured to determine whether the flow control parameter is greater than a preset flow, where the second instruction further includes: and the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameter. A second sending module 1005, configured to send a data compensation request when the determination result is yes, so that the core network sends compensation data to the terminal, so as to compensate for data lost by the terminal in the video group call. Wherein, the receiving address of the data compensation request is the address information of the core network.
The core network is described below, and the implementation principle and technical effect thereof are similar to those of the above method, and are not described herein again.
Fig. 6 is a schematic diagram illustrating a core network structure according to an example embodiment. As shown in fig. 6, the present embodiment provides a core network, including: a second receiving module 2001, configured to receive a first request and send a first instruction, where the first instruction is used to respond to the first request, so as to establish a unicast bearer between a core network and a terminal, and the first request at least includes: and (4) terminal address information. The third receiving module 2002 is configured to receive the second request and send a second instruction. The second instruction is used for responding to a second request to establish a video group call between the dispatching desk and the terminal, the second request is sent by the dispatching desk, and the second instruction at least comprises: the method comprises the steps of core network address information, a unicast-loaded data sending address is the core network address information, a unicast-loaded data receiving address is the terminal address information, and participants in the video group call change along with the movement of the terminal position. When the data received in the video group call is lost, compensation data is sent through unicast load to compensate the data lost by the terminal in the video group call.
Optionally, the method further comprises: a fourth receiving module 2003, configured to receive the data compensation request, and send the compensation data to the terminal corresponding to the terminal address information in the data compensation request after obtaining the compensation data according to the data loss information in the data compensation request, so as to compensate for the data lost by the terminal in the video group call. Wherein the second instructions further comprise: and the terminal sends a data compensation request when the flow control parameter is larger than the preset flow.
The network system is described below, and the implementation principle and technical effect thereof are similar to those of the above method, and are not described herein again.
The present invention also provides a network system, including the terminal related to the above fig. 5 and the optional embodiments and the core network related to the above fig. 6 and the optional embodiments. The terminal is in communication connection with the core network through the base station.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A video group calling method is characterized in that the method is applied to a network system, the network system at least comprises a terminal, a dispatching desk and a core network, and the method comprises the following steps:
the terminal sends a first request and a response message to the core network in sequence so that the core network sends a first instruction for responding to the first request to the terminal, wherein the first instruction is used for establishing a unicast bearer between the core network and the terminal, and the first request at least comprises: the terminal address information;
the terminal receives a second instruction sent by the core network so as to establish a video group call between the dispatching desk and the terminal; wherein the second instruction at least comprises: core network address information, wherein a data receiving address of the unicast bearer is the terminal address information, a data sending address of the unicast bearer is the core network address information, the second instruction is used for responding to a second request, the second request is sent by the dispatching desk, and participants of the video group call change along with the movement of the terminal position;
when the terminal determines that the data received in the video group call is lost, the terminal sends a data compensation request to the core network corresponding to the core network address information; wherein the data compensation request comprises at least: data loss information and the terminal address information;
and the terminal receives compensation data sent by the core network corresponding to the core network address information through the unicast bearer so as to compensate the data lost by the terminal in the video group call.
2. The method according to claim 1, wherein the sending, by the terminal, a data compensation request to the core network corresponding to the core network address information specifically includes:
the terminal acquires the address information of the core network and flow control parameters; wherein the second instruction further comprises: the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameter;
the terminal judges whether the flow control parameter is larger than a preset flow;
and when the judgment result is yes, the terminal sends a data compensation request to the core network corresponding to the core network address information.
3. The method of claim 1, wherein the data loss information is used to enable the core network to obtain the compensation data.
4. A video group calling method is characterized in that the method is applied to a network system, the network system at least comprises a terminal, a dispatching desk and a core network, and the method comprises the following steps:
the core network receives a first request and a response message which are sent by the terminal in sequence, and sends a first instruction to the terminal, wherein the first instruction is used for responding to the first request so as to establish a unicast bearer between the core network and the terminal, and the first request at least comprises: the terminal address information;
the core network receives a second request and sends a second instruction to the terminal; wherein, the second instruction is used for responding to the second request, so as to establish the video group call between the dispatching station and the terminal, the second request is sent by the dispatching station, and the second instruction at least includes: core network address information, wherein the data sending address of the unicast bearer is the core network address information, the data receiving address of the unicast bearer is the terminal address information, and participants in the video group call change along with the movement of the terminal position;
when the terminal determines that the data received in the video group call is lost, after receiving a data compensation request sent by the terminal, a core network corresponding to the core network address information sends compensation data to the terminal through the unicast bearer, so as to compensate the data lost by the terminal in the video group call, wherein the data compensation request at least comprises: data loss information and the terminal address information.
5. The method of claim 4, wherein the second instructions further comprise: and the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameter, and when the flow control parameter is larger than the preset flow, the terminal sends the data compensation request.
6. A terminal, comprising:
a first sending module, configured to send a first request and a response message in sequence, so that a core network sends a first instruction for responding to the first request to a terminal, where the first instruction is used to establish a unicast bearer between the core network and the terminal, and the first request at least includes: the terminal address information;
the first receiving module is used for receiving a second instruction sent by the core network so as to establish a video group call between the dispatching desk and the terminal; wherein the second instruction at least comprises: core network address information, wherein a data receiving address of the unicast bearer is the terminal address information, a data sending address of the unicast bearer is the core network address information, the second instruction is used for responding to a second request, the second request is sent by the dispatching desk, and participants of the video group call change along with the movement of the terminal position;
when the terminal determines that the data received in the video group call is lost, sending a data compensation request to the core network corresponding to the core network address information; wherein the data compensation request comprises at least: data loss information and the terminal address information;
and the terminal receives compensation data sent by the core network corresponding to the core network address information through the unicast bearer so as to compensate the data lost by the terminal in the video group call.
7. The terminal of claim 6, further comprising:
the acquisition module is used for acquiring core network address information and flow control parameters; wherein the second instruction further comprises: the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameter;
the judging module is used for judging whether the flow control parameter is larger than the preset flow;
and the second sending module is used for sending a data compensation request to the core network corresponding to the core network address information when the judgment result is yes.
8. A core network, comprising:
a second receiving module, configured to receive a first request and a response message that are sent by a terminal in sequence, and send a first instruction, where the first instruction is used to respond to the first request, so that a unicast bearer is established between the core network and the terminal, and the first request at least includes: the terminal address information;
the third receiving module is used for receiving the second request and sending a second instruction; wherein, the second instruction is used for responding to the second request, so as to establish the video group call between the dispatching desk and the terminal, the second request is sent by the dispatching desk, and the second instruction at least comprises: core network address information, wherein the data sending address of the unicast bearer is the core network address information, the data receiving address of the unicast bearer is the terminal address information, and participants in the video group call change along with the movement of the terminal position;
when data received in the video group call is lost, after a data compensation request sent by a terminal is received, compensation data is sent through the unicast bearer to compensate the data lost by the terminal in the video group call, wherein the data compensation request at least comprises: data loss information and the terminal address information.
9. The core network of claim 8, wherein the second instructions further comprise: and the second instruction is sent in a circulating mode in a preset period so as to update the flow control parameter, and when the flow control parameter is larger than the preset flow, the terminal sends the data compensation request.
10. A network system comprising a terminal according to claim 6 or 7 and a core network according to claim 8 or 9.
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