CN103945277B - Realize the mthods, systems and devices that mobile terminal video is shared - Google Patents

Abstract

The present invention proposes a method, system and device for realizing real-time video sharing of mobile terminals, wherein the method includes: the source mobile terminal sends video attribute information to the target mobile terminal; the video attribute information includes video sharing identification (Call ID) and collection start Data frame sequence number (Segment No); the source mobile terminal collects video data frames in real time, and encapsulates each collected video data frame into a data packet, wherein the name of the data packet is determined by the Call ID and Segment No; the data packet Send to the CCN node; the target mobile terminal generates an interest packet, the name of the interest packet is determined by the Call ID and Segment No, and sends the interest packet to the CCN node; after the CCN node receives the interest packet from the target mobile terminal, according to the name of the interest packet Obtain a data packet matching the Interest packet, and send the obtained data packet to the target mobile terminal. The invention can flexibly and effectively support the real-time sharing of large-scale mobile terminal video data.

Description

Method, system and device for realizing mobile terminal video sharing

technical field

The invention relates to the technical field of mobile communication, in particular to a method, system and device for realizing real-time video sharing of mobile terminals.

Background technique

With the popularity of smart mobile terminals and tablet computers, the wide coverage of 3G networks, and the increase of Wi-Fi hotspots, people's social and communication methods are gradually undergoing new changes. Different from traditional social networks, mobile terminals have natural contact attributes, real-name attributes, and location attributes compared to PCs, which can greatly reduce trust costs, and at the same time have strong convenience, meeting people's needs for socializing all the time and never being offline , coupled with the rapid popularization of smart terminal devices, mobile social networking is more imaginative than Internet social networking in terms of development scale and development prospects.

Nevertheless, the current mobile terminal video applications based on the results of the TCP/IP system have gradually exposed many inadaptations, and there are many problems in scalability, mobility, and security controllability.

Currently common mobile terminal video sharing technologies include:

The first is the central video media server distribution method, which uses a fixed and customized video source, and distributes and transmits video data to the target mobile terminal through the central server, so as to achieve the purpose of video broadcasting or even live broadcasting.

The second is the point-to-point real-time video transmission method. The video attribute data is transmitted between the source and the target mobile terminal through the mobile network. The audio and video are collected in real time through the mobile camera and uploaded to the video server. After the video server performs codec and format processing, sent to the target mobile terminal.

The above two methods have the following disadvantages:

The disadvantages of the central video media server distribution method are: the range of video sources is narrow, especially for real-time video, the source data format and content are limited, and the mobility is poor, which cannot meet the mobile terminal's unique data source movement and changing needs; at the same time, The central media server has limited service capabilities and cannot effectively support the access of geographically dispersed and large-scale user groups. Even if a CDN network is used, it cannot provide effective support for real-time video streaming, and the network operation cost is high.

The disadvantages of the point-to-point real-time video transmission method are: limited by the performance of terminal equipment and network bandwidth, the source mobile terminal is used as a content server, which cannot support large-scale video sharing, cannot perform large-scale real-time broadcast of video, and has a small range of use.

Contents of the invention

The invention provides a method for realizing real-time sharing of mobile terminal video, which can flexibly and effectively support real-time sharing of large-scale mobile terminal video data.

The invention also provides a system for realizing real-time sharing of mobile terminal video, a mobile terminal and a CCN node, which can flexibly and effectively support real-time sharing of large-scale mobile terminal video data.

Technical scheme of the present invention is realized like this:

A method for realizing real-time video sharing of a mobile terminal, applied to a network including a source mobile terminal, a target mobile terminal, and multiple content-centric network (CCN) nodes, the method comprising:

The source mobile terminal sends the video attribute information to the target mobile terminal; the video attribute information includes a video sharing identifier (Call ID) and a collection start data frame sequence number (Segment No;

The source mobile terminal collects video data frames in real time, and encapsulates the video data frames collected each time into a data packet, wherein the name of the data packet is determined by the Call ID and Segment No; the data packet is sent to the CCN node;

The target mobile terminal generates an interest packet, the name of the interest packet is determined by the Call ID and Segment No, and the interest packet is sent to the CCN node;

After receiving the Interest packet from the target mobile terminal, the CCN node obtains the data packet matching the Interest packet according to the name of the Interest packet, and sends the obtained data packet to the target mobile terminal.

A system for realizing real-time sharing of mobile terminal video, comprising:

The source mobile terminal is used to send the video attribute information to the target mobile terminal; the video attribute information includes a video sharing identifier (Call ID) and a collection start data frame sequence number (Segment No); it is also used to collect video data frames in real time, Encapsulate the video data frame collected each time into a data packet, and send the data packet to a content-centric network (CCN) node; wherein, the name of the data packet is determined by the Call ID and Segment No;

The target mobile terminal is used to generate an interest packet, the name of the interest packet is determined by the Call ID and Segment No, and the interest packet is sent to the CCN node;

Multiple CCN nodes are used to receive and store data packets; and are also used to obtain data packets matching the interest packet according to the name of the interest packet after receiving the interest packet from the target mobile terminal, and send the obtained data packet to the target mobile terminal.

A mobile terminal for realizing real-time sharing of mobile terminal video, comprising:

A signaling module, configured to send video attribute information to other mobile terminals; the video attribute information includes a video sharing identifier (Call ID) and a collection start data frame number (Segment No);

Acquisition module, is used for collecting raw video data;

A video engine, configured to process the original video data to obtain video data frames;

A transmission module, configured to encapsulate the video data frame into a data packet, and send the data packet to the CCN node; the name of the data packet is determined by the Call ID and Segment No.

A content-centric network (CCN) node that realizes real-time sharing of mobile terminal video, including:

The data packet receiving module is used to receive and save the data packet from the source mobile terminal;

The interest packet receiving module is used to receive and save the interest packet from the target mobile terminal; the name of the data packet or interest packet is determined by the video sharing identification (Call ID) and the collection start data frame sequence number (SegmentNo) in the video attribute information Sure;

The matching module is configured to obtain a data packet matching the Interest packet according to the names of the Interest packet and the data packet, and feed back the obtained data packet to the target mobile terminal that sends the Interest packet.

It can be seen that in the method, system and device for realizing real-time video sharing of mobile terminals proposed by the present invention, the source mobile terminal sends a video data packet to a content-centric network (CCN, Content Centric Network) node, and the target mobile terminal sends an interest packet to a CCN node. ; After receiving the Interest packet, the CCN node obtains the video data packet matching the Interest packet and feeds it back to the target mobile terminal, so as to realize the real-time sharing of large-scale mobile terminal video data.

Description of drawings

Fig. 1 is the method flow chart that realizes the real-time sharing of mobile terminal video that the present invention proposes;

2 is a schematic diagram of an application scenario of real-time sharing of mobile terminal video in Embodiment 1;

Fig. 3 is the implementation flowchart of the method for real-time sharing of mobile terminal video in embodiment two;

4 is a schematic structural diagram of a system structure for real-time sharing of mobile terminal video in Embodiment 3;

FIG. 5 is a schematic structural diagram of a mobile terminal that realizes real-time sharing of mobile terminal video proposed by the present invention;

FIG. 6 is a schematic structural diagram of a CCN node for realizing real-time video sharing of mobile terminals proposed by the present invention.

Detailed ways

The present invention proposes a method for realizing real-time video sharing of a mobile terminal, which is applied to a network including a source mobile terminal, a target mobile terminal, and multiple content-centric network (CCN) nodes, as shown in Figure 1 as a flowchart of the implementation, including:

Step 101: The source mobile terminal sends the video attribute information to the target mobile terminal; the video attribute information includes the video sharing identifier (Call ID) and the collection start data frame number (Segment No);

Step 102: the source mobile terminal collects video data frames in real time, and encapsulates the video data frames collected each time into a data packet, wherein the name of the data packet is determined by the Call ID and Segment No; the data packet is sent to the CCN node;

Step 103: the target mobile terminal generates an Interest packet, the name of the Interest packet is determined by the Call ID and SegmentNo, and sends the Interest packet to the CCN node;

Step 104: After receiving the Interest packet from the target mobile terminal, the CCN node obtains a data packet matching the Interest packet according to the name of the Interest packet, and sends the obtained data packet to the target mobile terminal.

In the above step 101, the source mobile terminal sends the video attribute information to the target mobile terminal in the following ways:

The source mobile terminal sends the video sharing invitation message to the central signaling server, and the central signaling server broadcasts the video sharing invitation message to the target mobile terminal;

The target mobile terminal sends a video attribute information request message to the source mobile terminal through the central signaling server, and the source mobile terminal feeds back the video attribute information to the target mobile terminal through the central signaling server;

Wherein, the central signaling server is deployed on a CCN node in the network.

In the above method, the name of the data packet or interest packet is composed of a common prefix and a variable suffix; where,

The public prefix is pre-saved by the source mobile terminal and the target mobile terminal;

The change suffix is composed of Call ID and data frame sequence number, wherein the data frame sequence number is determined by the Segment No.

In the above step 104, after the CCN node receives the Interest packet from the target mobile terminal, it obtains a data packet matching the Interest packet according to the name of the Interest packet, and the manner of sending the obtained data packet to the target mobile terminal can be as follows:

The CCN node judges whether there is a data packet with the same name as the interest packet locally, and if so, feeds the data packet back to the target mobile terminal; if not, forwards the interest packet to other CCN nodes, and the other CCN nodes Continue to judge until other CCN nodes judge that a data packet with the same name as the Interest packet is stored locally, receive and save the data packet fed back by the other CCN node, and feed the data packet back to the target mobile terminal.

In the following, specific embodiments will be described in detail in conjunction with the accompanying drawings.

Embodiment one:

This embodiment proposes a method for real-time sharing of mobile terminal video based on a CCN network. The source mobile terminal collects video data frames, and at the same time marks and names the encoded video data frames, encapsulates them into data packets (data packets), and sends them to the CCN node. At the same time, the video attribute information is transmitted to the target mobile terminal through the central signaling server; the target mobile terminal encapsulates the Interest packet (Interest packet) according to the received video attribute information, and sends the Interest packet to the CCN node to obtain the data packet corresponding to the Interest packet. The data packets are decoded and format converted to play locally.

Figure 2 is a schematic diagram of an application scenario for real-time sharing of mobile terminal video in this embodiment, specifically including:

The source mobile terminal 200, as the source of video data, calls the camera of the mobile terminal to collect video, encodes and compresses the collected original video data according to data frames, and marks and names the encoded video encoded data (content name), Then the marked data frame is encapsulated into a CCN data packet (Data packet), and sent to the CCN node 201 .

The system includes multiple CCN nodes, that is, CCN nodes 201-205.

After the CCN node 201 receives the data packet sent by the source mobile terminal 200, it will automatically establish a matching relationship between the data packet name and the data packet at this node, and when other CCN nodes forward the Interest packet matching the data packet, the data packet Feedback to the other CCN nodes.

The system includes a plurality of target mobile terminals, ie target mobile terminals 206-208, as the receiving end or requesting end of video sharing. After the video sharing starts, the target mobile terminal will send a video data frame interest packet to the CCN node to request the corresponding data packet. There may be multiple target mobile terminals, and the accessed CCN nodes may also be dispersed.

After receiving the Interest packet, the CCN node 204 and the CCN node 205 first check whether there is a data packet matching the Interest packet at the local node, and if not, forward the Interest packet to other CCN nodes of the route until the Interest packet is responded. In this scenario, the data packet will be responded to when the Interest packet is forwarded to the CCN node 201 .

In the transmission path of the data packet, each passing CCN node will save the data packet for the request of other target mobile terminals. For example, in this scenario, the data packet is sent from CCN node 201 to CCN node 203, and then sent to CCN node 204 and CCN node 205 respectively by CCN node 203; data pack.

Embodiment two:

This embodiment introduces the implementation process of real-time sharing of mobile terminal video, as shown in Figure 3 for the implementation flow chart, including:

Step S201: signaling initialization.

All mobile terminals establish communication connections with the central signaling server through the client signaling service module.

Wherein, the central signaling server is deployed on a certain CCN node, and interacts with the mobile terminal through the data interaction mode of the CCN protocol. In this step, the central signaling server has the functions of message and device management, and uses the periodic heartbeat monitoring mechanism to monitor the network status of the mobile terminal.

Step S202: the source mobile terminal sends a video sharing invitation message to the central signaling server, and the central signaling server forwards the request to other target mobile terminals;

After receiving the video sharing invitation message sent by the source mobile terminal, the target mobile terminal sends a video attribute information request message to the source mobile terminal through the central signaling server; after the source mobile terminal receives the video attribute information request message sent by the target mobile terminal, The central signaling server replies the video attribute information to the target mobile terminal.

Among them, the video attribute information may include media type, video format, transmission frame rate, collection start data frame number (Segment No), video sharing identifier (Call Id), and is sent in the format of an SDP protocol message.

Through the above steps S201 and S202, the source mobile terminal and the target mobile terminal share video attribute information. After that, the source mobile terminal can encapsulate and send the CCN data packet, as in the following steps S203-S206; the target mobile terminal can encapsulate and send the CCN request packet, and then obtain the CCN data packet matched by the CCN request packet, as in the following steps S207-S208.

Step S203: the source mobile terminal invokes the camera to collect video.

Step S204: The source mobile terminal codes and compresses the collected original video data according to data frames, and at the same time marks and names the coded video coded data, and encrypts them in preparation for generating CCN data packets.

Step S205: the source mobile terminal encapsulates the tagged and encrypted video encoding data into a CCN data packet, and sends it to the CCN node.

Among them, the CCN data package includes name, digital signature and content data. Wherein, the name is the name of the data collected by the source mobile terminal, which is used to uniquely identify the data packet in the CCN network, and the target mobile terminal can request the corresponding CCN data packet according to the name. The name is composed of a public prefix and a variable suffix, wherein the public prefix is a namespace for marking video sharing and is known to all mobile terminals; the variable suffix is composed of a Call Id and a data frame number, and the data frame number is determined by the SegmentNo, that is, the first The data frame sequence number of a CCN data packet is equal to Segment No, and the data frame sequence numbers of subsequent CCN data packets are incremented sequentially on the basis of Segment No.

Step S206: After receiving the CCN data packet sent by the source mobile terminal, the CCN node decrypts the CCN data packet, obtains the name and content data corresponding to the CCN data packet, establishes a correspondence between the name and the content data, and at the same time converts the CCN data Packets are cached on this CCN node.

So far, the source mobile terminal encapsulates and sends the CCN data packet, and the CCN node saves the CCN data packet. On the other hand, the target mobile terminal sends a CCN Interest packet to the CCN node, and obtains a CCN data packet matched by the CCN Interest packet, that is, steps S207-S208.

Step S207: After receiving the video attribute information sent by the source mobile terminal, the target mobile terminal names the CCN Interest packet according to the content of the video attribute information, and sends the CCN Interest packet to the CCN node.

CCN Interest packets are named in the same way as CCN Data packets.

Step S208: After receiving the CCN Interest packet sent by the target mobile terminal, the CCN node first searches locally whether there is a CCN data packet matching the CCN Interest packet, and if so, feeds back the found CCN data packet to the target mobile terminal ; If not, forward the CCN Interest packet to other CCN nodes until the CCN Interest packet is responded, and feed back the matching CCN data packet to the target mobile terminal.

Embodiment three:

This embodiment introduces a system for realizing real-time video sharing by mobile terminals, as shown in FIG. Among them, the source mobile and the target mobile run the same service, that is, a mobile terminal itself can be used as both the source mobile terminal and the target mobile terminal, and the video sharing source and video receiving end can be switched freely.

The source mobile terminal 1 includes:

The collection module 11 is used to call the device-side camera to collect the original video data;

The signaling module 13 is used for session and message transmission, that is, sending the video sharing request message and video attribute information of the source mobile terminal to the target mobile terminal;

Video engine 14 is mainly used for audio and video codec, audio and video encryption, video and audio and video data processing; said audio and video data processing mainly includes video buffering, which can reduce the adverse effects caused by video jitter and video packet loss, Image enhancement, processing the image captured by the camera, including brightness monitoring, color enhancement, noise reduction processing, etc. Sound data processing includes echo cancellation, automatic gain, noise reduction, silent monitoring, etc., through this module to improve the quality of the video ;

The transmission module 15 is mainly used for audio and video data segment network transmission and flow control. After the processed audio and video encoded data, the data label is named, and the audio and video data is encapsulated into a CCN packet by using the encapsulation interface in the CCN protocol library. Send to CCN network node.

The CCN protocol library 16 mainly provides some encapsulation interfaces based on the CCN protocol for calling by other modules.

The CCN network service 2 includes a central signaling server 23 and a CCN network node; wherein,

The central signaling server 23 mainly provides session management (client session authentication, online status, device list, etc.), data storage management (storage of terminal information, basic video information), data transmission (establishment of data between the source mobile terminal and the target mobile terminal) communication); the central signaling server 23 is deployed on one of the CCN network nodes in the network, and itself also has the function of a CCN network node.

CCN network nodes, CCN network nodes mainly have three data structures, forwarding information table (FIB, Forwardinginformation Base), content cache (CS, Content Store) and waiting interest table (PIT, Pending InterestTable); FIB is used to forward interest packets, CS It is used to cache and transmit data, and through an effective cache management strategy, the transmission of the same data segment in the network can be reduced. The PIT is used to save the request interface of the interest packet. The data packet is forwarded according to the PIT entry. When the PIT entry is used to forward the data packet, the entry will be deleted immediately. When an interest packet arrives at the CCN network node, the CCN network node first according to The content name (Content Name) in the interest packet looks up the content cache. If there is the requested content in the cache, it responds to the request and discards the interest packet; if there is no requested content in the content cache, it searches for the PIT. If the PIT If there is the content name entry in the PIT, add the interface (Face) in the content name entry, and discard the interest packet; if there is no such content name entry in the PIT, then search for the FIB, if found in the FIB, then search for the Face according to the FIB The Interest packet is forwarded through the interface and recorded in the PIT. If there is no such content name entry in the FIB, the Interest packet is discarded. The processing of data packets by CCN network nodes is relatively simple. When a data packet arrives, it is first searched in the content cache according to the content name field of the data packet. If there is, the data packet is discarded; if not, it is cached in the content cache.

The CCN network node receiving the data packet of the source mobile terminal and the CCN network node responding to the interest packet of the target mobile terminal may be the same CCN network node or different CCN network nodes; at the same time, the target mobile terminal and the CCN network node may be Many-to-many, that is, multiple target mobile terminals can send their interest packets to different CCN network nodes.

Multiple CCN network nodes are connected to each other by configuring routes. The interest packet sent by the target mobile terminal can be propagated among the CCN network nodes until it is responded to. At the same time, the data packet corresponding to the interest packet can be automatically cached in each propagated CCN network node. Therefore, this system can also support the sharing of recorded and broadcast videos by setting the expiration time of the video data packets of the source mobile terminal.

The operating system of the target mobile terminal 3 is the same as that of the source mobile terminal 1 . The target mobile terminal 3 includes:

The rendering module 32 is used to render the video frame data, create an image canvas at the target mobile terminal, convert the decoded video data into a bitmap and render it on the canvas;

The signaling module 33 is used for session and message transmission, that is, sending a video attribute information request message to the source mobile terminal, and receiving the video attribute information fed back by the source mobile terminal;

Video engine 34, is used for processing video data frame;

The transmission module 35 is used to encapsulate the CCN interest packet, send the CCN interest packet to the CCN network node, and receive the CCN data packet fed back by the CCN network node, decapsulate the CCN data packet, and send the obtained video data frame to the video engine 34;

The CCN protocol library 36 is used to provide an encapsulation interface based on the CCN protocol for calling by other modules.

A mobile terminal can be both a source mobile terminal and a target mobile terminal, that is, it includes the above-mentioned constituent modules and functions of the source mobile terminal 1 and the target mobile terminal 3 at the same time.

The present invention also proposes a system for realizing real-time sharing of mobile terminal video, including:

The source mobile terminal is used to send the video attribute information to the target mobile terminal; the video attribute information includes Call ID and Segment No; it is also used to collect video data frames in real time, and encapsulate each collected video data frame into a data packet , sending the data packet to the content centric network CCN node; wherein, the name of the data packet is determined by the Call ID and Segment No;

The target mobile terminal is used to generate an interest packet, the name of the interest packet is determined by the Call ID and Segment No, and the interest packet is sent to the CCN node;

Multiple CCN nodes are used to receive and store data packets; and are also used to obtain data packets matching the interest packet according to the name of the interest packet after receiving the interest packet from the target mobile terminal, and send the obtained data packet to the target mobile terminal.

The above system may also include:

The central signaling server, deployed on a CCN node in the system, is used to record and monitor the status of the mobile terminal, receive the video sharing invitation message from the source mobile terminal, and broadcast the video sharing invitation message to the target mobile terminal; Receive the video attribute information request message sent by the target mobile terminal, and forward the video attribute information request message to the source mobile terminal; receive the video attribute information fed back by the source mobile terminal, and forward the video attribute information to the target mobile terminal.

In the above system, the name of the data packet or interest packet can be composed of a common prefix and a variable suffix; where,

The public prefix is pre-saved by the source mobile terminal and the target mobile terminal;

The change suffix is composed of Call ID and data frame sequence number, wherein the data frame sequence number is determined by the Segment No.

In the above system, the CCN node obtains the data packet matching the Interest packet according to the name of the Interest packet, and sends the obtained data packet to the target mobile terminal as follows:

The CCN node judges whether there is a data packet with the same name as the interest packet locally, and if so, feeds the data packet back to the target mobile terminal; if not, forwards the interest packet to other CCN nodes, and the other CCN nodes Continue to judge until other CCN nodes judge that a data packet with the same name as the Interest packet is stored locally, receive and save the data packet fed back by the other CCN node, and feed the data packet back to the target mobile terminal.

The present invention also proposes a mobile terminal that realizes real-time sharing of mobile terminal video, as shown in Figure 5, which is a schematic structural diagram of the mobile terminal, including:

A signaling module 501, configured to send video attribute information to other mobile terminals; the video attribute information includes Call ID and Segment No;

Acquisition module 502, for collecting original video data;

A video engine 503, configured to process the original video data to obtain video data frames;

The transmission module 504 is configured to encapsulate the video data frame into a data packet, and send the data packet to the CCN node; the name of the data packet is determined by the Call ID and Segment No.

The above mobile terminal may also include a rendering module 505;

The signaling module 501 can also be used to receive video attribute information from other mobile terminals;

The transmission module 504 can also be used to generate an interest packet, and send the interest packet to the CCN node; the name of the interest packet is determined by Call ID and Segment No in the video attribute information received by the signaling module 501; For receiving the data packet fed back by the CCN node, decapsulating the data packet, and sending the obtained video data frame to the video engine 503;

The video engine 503 can also be used to process the data packet and send the processed data to the rendering module 505;

The rendering module 505 is configured to play the data.

In the above-mentioned mobile terminal, the signaling module 501 sends the video attribute information to other mobile terminals in the following ways: broadcast a video sharing invitation message to other mobile terminals through the central signaling server; When an attribute information request message is sent, the video attribute information is forwarded to other mobile terminals through the central signaling server;

The signaling module 501 obtains the video attribute information from other mobile terminals in the following manner: obtain the video sharing invitation message broadcast by the central signaling server from other mobile terminals; forward the video attribute information request message to the other mobile terminals through the central signaling server; The video attribute information forwarded by the other mobile terminal through the central signaling server is received.

In the above mobile terminal, the name of the data packet or interest packet is composed of a common prefix and a variable suffix; where,

The public prefix is pre-stored by the mobile terminal;

The change suffix is composed of Call ID and data frame sequence number, wherein the data frame sequence number is determined by the Segment No.

The present invention also proposes a CCN node that realizes real-time video sharing of mobile terminals, as shown in Figure 6, which is a schematic structural diagram of the CCN node, including:

A data packet receiving module 601, configured to receive and save a data packet from a source mobile terminal;

Interest packet receiving module 602 is used to receive and save the interest packet from the target mobile terminal; the name of the data packet or interest packet is determined by Call ID and Segment No in the video attribute information;

The matching module 603 is configured to obtain a data packet matching the Interest packet according to the names of the Interest packet and the data packet, and feed back the obtained data packet to the target mobile terminal sending the Interest packet.

The above CCN nodes may also include:

The central signaling service module 604 is configured to receive a video sharing invitation message from a source mobile terminal, and broadcast the video sharing invitation message to a target mobile terminal; it is also used to receive a video attribute information request message from a target mobile terminal, and broadcast the video The attribute information request message is forwarded to the source mobile terminal; the video attribute information from the source mobile terminal is received, and the video attribute information is forwarded to the target mobile terminal.

In the above-mentioned CCN node, the matching module 603 is used to judge whether the CCN node stores a data packet with the same name as the received Interest packet, and if so, feeds back the data packet to the target mobile terminal that sends the Interest packet; If not, forward the Interest packet to other CCN nodes, and the other CCN nodes will continue to make judgments until the other CCN nodes judge that there is a data packet with the same name as the Interest packet stored locally, then receive and save the feedback from the other CCN nodes , and feed back the data packet to the target mobile terminal that sent the Interest packet.

In summary, the method, system and device for realizing real-time video sharing of mobile terminals proposed by the present invention can realize real-time video sharing based on a CCN network, and the source mobile terminal can broadcast and share captured pictures and sounds to multiple target mobile terminals in real time , can broadcast the target mobile terminal in real time, so as to realize real-time video sharing of the mobile terminal with better mobility and flexibility. The video source can be dynamically switched, and each mobile terminal connected to the network can be used as a source or as a data receiving terminal. It has good mobility and scalability, and is especially suitable for situations where geographical locations are dispersed and there are many access terminals. .

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection.

Claims (12)

1. A method for realizing real-time sharing of mobile terminal video, characterized in that, the method is applied to a network comprising a source mobile terminal, a target mobile terminal and a plurality of content-centric network CCN nodes, and the method comprises: The source mobile terminal sends the video attribute information to the target mobile terminal; the video attribute information includes the video sharing identifier Call ID and the acquisition start data frame sequence number Segment No; The source mobile terminal collects video data frames in real time, and encapsulates the video data frames collected each time into a data packet, wherein the name of the data packet is determined by the Call ID and Segment No; the data packet is sent to the CCN node; The target mobile terminal generates an interest packet, the name of the interest packet is determined by the Call ID and Segment No, and the interest packet is sent to the CCN node; After the CCN node receives the Interest packet from the target mobile terminal, it obtains a data packet matching the Interest packet according to the name of the Interest packet, and sends the obtained data packet to the target mobile terminal; Wherein, the name of described data packet or interest packet is made up of common prefix and change suffix; Wherein, The public prefix is pre-saved by the source mobile terminal and the target mobile terminal; The change suffix is composed of Call ID and data frame sequence number, wherein the data frame sequence number is determined by the Segment No. 2. The method according to claim 1, wherein the source mobile terminal sends the video attribute information to the target mobile terminal in the following manner: The source mobile terminal sends the video sharing invitation message to the central signaling server, and the central signaling server broadcasts the video sharing invitation message to the target mobile terminal; The target mobile terminal sends a video attribute information request message to the source mobile terminal through the central signaling server, and the source mobile terminal feeds back the video attribute information to the target mobile terminal through the central signaling server; Wherein, the central signaling server is deployed on a CCN node in the network. 3. The method according to claim 1, wherein, after the CCN node receives the interest packet from the target mobile terminal, it obtains the data packet matching the interest packet according to the name of the interest packet, and sends the obtained data packet The way to the target mobile terminal is: The CCN node judges whether there is a data packet with the same name as the interest packet locally, and if so, feeds the data packet back to the target mobile terminal; if not, forwards the interest packet to other CCN nodes, and the other CCN nodes Continue to judge until other CCN nodes judge that a data packet with the same name as the Interest packet is stored locally, receive and save the data packet fed back by the other CCN node, and feed the data packet back to the target mobile terminal. 4. A system for realizing real-time sharing of mobile terminal video, characterized in that the system includes: The source mobile terminal is used to send the video attribute information to the target mobile terminal; the video attribute information includes the video sharing identifier Call ID and the collection start data frame sequence number Segment No; it is also used for real-time collection of video data frames, and each collection The video data frame is encapsulated into a data packet, and the data packet is sent to the CCN node of the content centric network; wherein, the name of the data packet is determined by the Call ID and Segment No; The target mobile terminal is used to generate an interest packet, the name of the interest packet is determined by the Call ID and Segment No, and the interest packet is sent to the CCN node; Multiple CCN nodes are used to receive and store data packets; and are also used to obtain data packets matching the interest packet according to the name of the interest packet after receiving the interest packet from the target mobile terminal, and send the obtained data packet to the target mobile terminal; Wherein, the name of described data packet or interest packet is made up of common prefix and change suffix; Wherein, The public prefix is pre-saved by the source mobile terminal and the target mobile terminal; The change suffix is composed of Call ID and data frame sequence number, wherein the data frame sequence number is determined by the Segment No. 5. The system according to claim 4, wherein the system further comprises: The central signaling server, deployed on a CCN node in the system, is used to record and monitor the status of the mobile terminal, receive the video sharing invitation message from the source mobile terminal, and broadcast the video sharing invitation message to the target mobile terminal; Receive the video attribute information request message sent by the target mobile terminal, and forward the video attribute information request message to the source mobile terminal; receive the video attribute information fed back by the source mobile terminal, and forward the video attribute information to the target mobile terminal. 6. system according to claim 4, it is characterized in that, described CCN node obtains the data packet of matching this Interest packet according to the title of Interest packet, the mode that the data packet of acquisition is sent to this target mobile terminal is: The CCN node judges whether there is a data packet with the same name as the interest packet locally, and if so, feeds the data packet back to the target mobile terminal; if not, forwards the interest packet to other CCN nodes, and the other CCN nodes Continue to judge until other CCN nodes judge that a data packet with the same name as the Interest packet is stored locally, receive and save the data packet fed back by the other CCN node, and feed the data packet back to the target mobile terminal. 7. A mobile terminal that realizes real-time sharing of mobile terminal video, characterized in that the mobile terminal includes: The signaling module is used to send video attribute information to other mobile terminals; the video attribute information includes video sharing identification Call ID and collection start data frame sequence number Segment No; Acquisition module, is used for collecting raw video data; A video engine, configured to process the original video data to obtain video data frames; A transmission module, configured to encapsulate the video data frame into a data packet, and send the data packet to a CCN node; the name of the data packet is determined by the Call ID and Segment No; Wherein, the name of described data packet or interest packet is made up of common prefix and change suffix; Wherein, The public prefix is pre-stored by the mobile terminal; The change suffix is composed of Call ID and data frame sequence number, wherein the data frame sequence number is determined by the Segment No. 8. The mobile terminal according to claim 7, further comprising a rendering module; The signaling module is also used to receive video attribute information from other mobile terminals; Described transmission module is also used for generating interest packet, and described interest packet is sent to CCN node; The title of described interest packet is determined by Call ID and Segment No in the video attribute information that signaling module receives; Also used for receiving The data packet fed back by the CCN node is decapsulated to the data packet, and the obtained video data frame is sent to the video engine; The video engine is also used to process the data packet and send the processed data to the rendering module; The rendering module is used to play the data. 9. The mobile terminal according to claim 8, wherein the signaling module sends video attribute information to other mobile terminals in a manner of: broadcasting a video sharing invitation message to other mobile terminals through a central signaling server; When other mobile terminals forward the video attribute information request message through the central signaling server, the video attribute information is forwarded to other mobile terminals through the central signaling server; The method for the signaling module to obtain video attribute information from other mobile terminals is: obtain the video sharing invitation message from other mobile terminals broadcast by the central signaling server; forward the video attribute information request message to the other mobile terminals through the central signaling server ; Receive the video attribute information forwarded by the other mobile terminal through the central signaling server. 10. A content-centric network CCN node that realizes mobile terminal video real-time sharing, is characterized in that, described CCN node comprises: The data packet receiving module is used to receive and save the data packet from the source mobile terminal; The interest packet receiving module is used to receive and save the interest packet from the target mobile terminal; the name of the data packet or the interest packet is determined by the video sharing identifier Call ID and the collection start data frame sequence number Segment No in the video attribute information; A matching module, configured to obtain a data packet matching the Interest packet according to the names of the Interest packet and the data packet, and feed back the obtained data packet to the target mobile terminal that sends the Interest packet; Wherein, the name of described data packet or interest packet is made up of common prefix and change suffix; Wherein, The public prefix is pre-saved by the source mobile terminal and the target mobile terminal; The change suffix is composed of Call ID and data frame sequence number, wherein the data frame sequence number is determined by the Segment No. 11. CCN node according to claim 10, is characterized in that, described CCN node also comprises: The central signaling service module is used to receive the video sharing invitation message from the source mobile terminal, broadcast the video sharing invitation message to the target mobile terminal; it is also used to receive the video attribute information request message from the target mobile terminal, and set the video attribute information to the target mobile terminal. The information request message is forwarded to the source mobile terminal; the video attribute information from the source mobile terminal is received, and the video attribute information is forwarded to the target mobile terminal. 12. The CCN node according to claim 10, wherein the matching module is used to judge whether the CCN node stores a data packet identical to the received Interest packet name, and if so, the data The packet is fed back to the target mobile terminal that sent the Interest packet; if not, the Interest packet is forwarded to other CCN nodes, and the other CCN nodes continue to make judgments until other CCN nodes judge that there is an interest packet with the same name as the Interest packet locally. When receiving a data packet, receive and save the data packet fed back by the other CCN nodes, and feed back the data packet to the target mobile terminal that sent the Interest packet.