CN101668027B - Method and system for providing multimedia content and client - Google Patents
Method and system for providing multimedia content and client Download PDFInfo
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- CN101668027B CN101668027B CN200810146666.2A CN200810146666A CN101668027B CN 101668027 B CN101668027 B CN 101668027B CN 200810146666 A CN200810146666 A CN 200810146666A CN 101668027 B CN101668027 B CN 101668027B
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Abstract
The invention discloses a method and a system for providing multimedia content, a client and a server. The method comprises the following steps: sending the multimedia content in peer-to-peer format in the content server to the client through a digital broadcast network; and when the client determines that the received multimedia content has data loss, acquiring the lost data from other peer-to-peer nodes in a peer-to-peer network. In the method and the system for providing the multimedia content provided by the invention, the content server sends multimedia data through the broadcast network, and the client acquires the data lost in the broadcasting through the peer-to-peer network, so the method and the system solve the problem that digital broadcast/multicast cannot send lost data packets of the client according to a client receiving condition, utilize the P2P technology to relieve the pressure of the server required to processing packet loss retransmission requests of the client, and provide high-quality multimedia service for users.
Description
Technical field
The present invention relates to digital broadcast network technology and peer-to-peer network technology, relate in particular to a kind of supplying method, system and client of content of multimedia.
Background technology
Present multimedia transmission mode mainly comprises clean culture (unicasting), broadcasting (broadcasting)/multicast (multicasting) and equity (Peer-to-Peer, P2P) mode.
Clean culture refers to only have the datagram transmission of a destination.That the streaming media service of present the Internet adopts the transmission of data mode usually based on the clean culture of UDP/TCP.In clean culture, request server retransmits if client is found packet loss.Increase with number of users increases mode of unicast to the pressure of server.
Multicast is a kind of form of multicast.It uses hardware technology, by communicating by letter with a large amount of multicast address.When a certain group of machinery requirement communication, select a multicast address, and configure corresponding network interface hardware, the identification multicast address, thus receive the copy that divides into groups on this multicast address.
Broadcasting is the more general form of multicast, and it delivers the copy of a grouping to each point of destination.The communication mode of " a pair of all " between the main frame, network all unconditionally copies and transmits the signal that each main frame wherein sends, All hosts can receive all information (no matter whether you need), because it is without Path selection, so its network cost can be very cheap.But broadcasting can't in time be provided personalized service for each client's requirement and time.
The P2P technology is also referred to as the peer-to-peer network technology, and this is a kind of thought of network configuration.It with present network in the essential distinction of client/server (Client/Server) structure (namely WWW adopt frame mode) of dominate be not need to exist Centroid (or central server) in the whole network configuration.In the P2P framework, each peer (Peer) has the function of the three aspects :s such as information consumer, informant and information communication mostly simultaneously.The rights and duties that each node has in the P2P network are reciprocity.Briefly, P2P is exactly directly with people contact, allows people pass through the Internet direct interaction.P2P eliminates the agent veritably so that the communication on the network becomes easily, more direct knowledge sharing and alternation.Another important feature of P2P is the present state centered by large website in change the Internet, returns to " decentralization ", and power is given back the user.The P2P mode is one of multimedia transmission mode main on the present the Internet by avoiding clean culture to the pressure of server and bandwidth in the shared among users data.
Digital broadcasting/multicast network is broadcasted identical content to all users, no matter whether user's reception environment is identical, radio network can be according to the data of user's Environmental adjustments emission, if therefore the residing reception environment of user is relatively poor, error code and packet loss phenomenon then can appear, therefore the program video that presents of terminal has mosaic, sound to have noise, text the phenomenons such as mess code to occur, will affect user's business experience.But because digital broadcasting/multicast network is the one-way transmission network, the reception condition that server can't inquiring client terminal can only by increasing transmitter power and mending point and wait measure lifting signal quality, increase network construction cost.The service that can't provide according to user's reception condition packet loss to retransmit.
Summary of the invention
The present invention will provide a technical problem that solves a kind of supplying method of content of multimedia, can provide high-quality multimedia service for the user.
The supplying method of content of multimedia of the present invention comprises step: the content of multimedia of reciprocity form in the content server is sent to client by digital broadcast network; The business guide information that will comprise channel and peer-to-peer information sends to client by digital broadcast network or peer-to-peer network, and peer-to-peer information comprises burst information; Peer tabulation and node attribute information are sent to client by digital broadcast network or peer-to-peer network, and described node attribute information comprises the burst that node receives; When client determined that there is loss of data in the content of multimedia of the reciprocity form of reception, other peer node from peer-to-peer network obtained missing datas.
Wherein, the content of multimedia of the reciprocity form content of multimedia that reciprocity burst or RTP (Real-Time Transport Protocol, RTP) bag forms of serving as reasons.
According to one embodiment of present invention, content server is HMS, and the method also comprises step: client is upward registered this node according to described business guide information to HMS; HMS sends to client with peer tabulation and program burst information.Client is searched described missing data by reciprocity signaling according to address information in the described peer tabulation in adjacent node, the package informatin that other nodes are stored this client is notified described client.
The supplying method of the content of multimedia that provides of the present invention, send multi-medium data by radio network, missing data when obtaining broadcasting by peer-to-peer network, having overcome digital broadcasting/multicast can't be according to the problem of client situation transmission client missing data bag, utilize the P2P technology to alleviate the packet loss repeat requests pressure that server end needs clients to be processed, for the user provides high-quality multimedia service.
A kind of system that provides of content of multimedia is provided another technical problem that the present invention will solve, and can provide high-quality multimedia service for the user.
A kind of system that provides of content of multimedia is provided, comprise: content server, be used for storing the content of multimedia of reciprocity form, send content of multimedia by digital broadcast network, peer tabulation and node attribute information are sent to client, and node attribute information comprises the burst that node receives; Client is used for receiving the content of multimedia from the reciprocity form of content server, receives peer tabulation and node attribute information; When there is loss of data in the content of multimedia of the reciprocity form of determining to receive, obtain missing data by peer-to-peer network; Service guideline server is used for preserving the business guide information that comprises channel and peer-to-peer information, and business guide information is sent to client, and peer-to-peer information comprises burst information.Client is carried out the node registration according to business guide information to content server, and content server also is used for peer tabulation and program burst information are sent to described client.Described client is determined peer node in the described peer-to-peer network to obtain described missing data from described peer node according to described Peer tabulation and program burst information.
The embodiment that system is provided according to content of multimedia of the present invention, also comprise super node, be used for receiving the content of multimedia from the reciprocity form of described content server, other peer node request missing datas in described content server or the peer-to-peer network receive from the request of data of described client and return the data of request.
The content of multimedia that provides of the present invention system is provided, send multi-medium data by content server by radio network, missing data when client is obtained broadcasting by peer-to-peer network, having overcome digital broadcasting/multicast can't be according to the problem of client situation transmission client missing data bag, utilize the P2P technology to alleviate the packet loss repeat requests pressure that server end needs clients to be processed, for the user provides high-quality multimedia service.
The present invention also provides a kind of client of using said method and system, and client receives the business guide information that comprises channel and peer-to-peer information by digital broadcast network or peer-to-peer network, and peer-to-peer information comprises burst information; This client comprises: the broadcast data receiver module, for the content of multimedia that receives reciprocity form from digital broadcast network; The obliterated data acquisition module is used for judging whether content of multimedia that described broadcast data receiver module receives exists loses, and obtains described missing data from peer-to-peer network determining to exist when losing; Peer-to-peer information registration receiver module is used for the burst information to content server registration receive data, is used for receiving Peer tabulation and program burst information; The obliterated data acquisition module is used for registering the Peer tabulation of receiver module reception and the peer node that the program burst information is determined peer-to-peer network according to described peer-to-peer information, and obtains described missing data from the peer node of determining.
The present invention also provides a kind of content server of using said method and system, comprising: content storage module, for the content of multimedia of storing reciprocity form; The content broadcast module is for the content of multimedia that sends described content storage module by digital broadcast network.
Further, this content server also comprises the peer-to-peer information administration module, is used for the receiving node log-on message, safeguards and send Peer tabulation and program burst information.
Description of drawings
Fig. 1 is the network architecture diagram according to the embodiment that system is provided of content of multimedia of the present invention;
Fig. 2 is the network structure according to the application examples that system is provided of content of multimedia of the present invention;
Fig. 3 is the flow chart according to an embodiment of the supplying method of content of multimedia of the present invention;
Fig. 4 is the flow chart according to another embodiment of the supplying method of content of multimedia of the present invention;
Fig. 5 is the structure chart according to an embodiment of content server of the present invention;
Fig. 6 is the structure chart according to another embodiment of content server of the present invention;
Fig. 7 is the structure chart according to an embodiment of client of the present invention;
Fig. 8 is the structure chart according to another embodiment of client of the present invention.
Embodiment
With reference to the accompanying drawings the present invention is described more fully, exemplary embodiment of the present invention wherein is described.
Fig. 1 is the network architecture diagram according to the embodiment that system is provided of content of multimedia of the present invention.As shown in Figure 1, this system comprises content server 11 and the client (for example, ordinary node 16 and super node 15) that is in digital broadcasting/multicast network 13.Client also is simultaneously the node in the peer-to-peer network 14.Content server 11 is used for storing the content of multimedia of reciprocity form, sends this content of multimedia by digital broadcasting/multicast network 13.Client is used for receiving the content of multimedia from content server 11, judge whether the content of multimedia that receives exists loss of data, when determining that there is loss of data in the content of multimedia that receives, obtain missing data by peer-to-peer network 14 from other peer node.Also comprise alternatively service guideline server 12 in the system, be used for preserving the business guide information that comprises channel and P2P information, business guide information is sent to client.Compare with ordinary node 16, super node 15 has public network address usually, and content is more complete, and bandwidth is sufficient, and performance is higher.If super node 15 is found packet loss, then to the re-transmission of content server 11 or other super node request packet losses, the agreement of request can be P2P or non-P2P agreement.If ordinary node 16 is found packet losses, then by the ordinary node request packet loss of peer-to-peer network 14 in super node 15 or this network segment, the agreement of request is the P2P agreement.Content server 11 and service guideline server 12 can be positioned on the same server, also can be positioned on the different servers.
Fig. 2 is the network structure according to the application examples that system is provided of content of multimedia of the present invention.As shown in Figure 2, after programme content is processed by source of media 21 and encoder 22, be packaged as the media bag of P2P form by the center media base station (CMS) 23 in the P2P network.CMS 23 is placed on core network usually, is used for memory contents.CMS 23 is to source of media application media content, and is converted to the applicable form of P2P agreement and is stored in the storage medium.P2P information comprises media file sign, filename, the server address that seed can be provided, port, file size, the sheet number that divides and the every information such as length.The length of data fragmentation is generally 2 power, and such as 256,512K, data slice length is usually identical.Data slice sends to client through peer-to-peer network or radio network after by the encapsulation of P2P packet header and IP packet header, and P2P packet header generally includes data slice numbering, length and media data sheet etc.CMS 23 is forwarded to the media bag of P2P form storage in the ownership media base station (HMS) 24 of edge network.HMS 24 is placed on the edge network near the end user usually.HMS 24 is from CMS 23 receiving media datas, and it is transferred to client.Simultaneously HMS 24 also collects the information of each all client of channel, such as the quantity of transmission quality, upload and download etc.When client terminal start-up, the tabulation that obtains initial p eer from HMS 24 is used for transfer of data.After service guideline server (ESG) 25 obtains the information of channel, generate business guide, comprise channel and P2P information.The broadcast/group broadcast network obtains content from ownership media base station 24, obtain business guides from service guideline server 25, and with business guide and content downlink broadcast to client 26.Receive client 26 and comprise super node and ordinary node.If super node is found packet loss, by the re-transmission of peer-to-peer network to ownership media base station 24 or other super node request packet losses, the agreement of request can be P2P or non-P2P agreement.If ordinary node is found packet loss, by the ordinary node request packet loss of peer-to-peer network in super node or this network segment, the agreement of request is the P2P agreement.There is the node of the packet of request to send packet to requesting node.
Alternatively, business guide and P2P business and nodal information can be transferred to client by broadcast channel or interactive channel.
HMS 24 can have the interface with broadcast/group broadcast network and bilateral network simultaneously, and corresponding HMS 24 is perhaps respectively arranged in broadcast/group broadcast network and bilateral network.Under latter event, the contents of two ownership media base stations are synchronous, and data are divided into the sheet of identical content, can retransmit according to the server request that is identified to of sheet when sheet that client terminal to discover is lost.
Fig. 3 is the flow chart according to an embodiment of the supplying method of content of multimedia of the present invention.
As shown in Figure 3, in step 302, the content of multimedia of reciprocity form in the content server is sent to client by digital broadcast network.The content of multimedia of equity form can wrap the content of multimedia that forms by P2P burst or RTP.
In step 304, when client determined that there is loss of data in the content of multimedia that receives, other peer node from peer-to-peer network obtained missing data.Client can according to the numbering of receive data whether continuously and/or data check whether correctly judged whether loss of data, if the numbering of receive data is discontinuous or data check makes a mistake, then determine to exist loss of data.When the client terminal to discover packet loss, can in adjacent P2P node, ask packet loss according to the numbering of P2P burst or the numbering of RTP bag, other node sends the bag of losing by the P2P network and arrives the node of request.
When the buffering area of client was enough, still have packet loss in may buffering area this moment, as long as but when reaching the threshold that can play, client just can be play the content of multimedia of reception.
Fig. 4 is the flow chart according to another embodiment of the supplying method of content of multimedia of the present invention.
As shown in Figure 4, in step 402, ownership media base station carries the information (for example, the coding of the IP address of HMS, business and packet fragmentation information etc.) of self to service guideline server, and is integrated with business guide.Comprise channel and P2P information in the business guide, such as ownership IP address, media base station, port, content information, burst information etc.
At step 404a, service guideline server issuing service guide is to radio network, and the radio network broadcast business instruction is to client.
Perhaps,
At step 404b, to service guideline server requested service guide information, service guideline server sends business guide to client by peer-to-peer network to the user by peer-to-peer network.
In step 406, the P2P client is registered this node according to business guide in HMS, and the information of registration comprises user ID, IP address and port etc.HMS is according to user's the adjacent peer tabulation of the Information generations such as IP address, nodal community (such as burst, the network architecture and the code check etc. of node reception) information.
At step 408a, HMS sends to client with peer tabulation and node attribute information by peer-to-peer network.
Perhaps,
At step 408b, HMS with peer tabulation and node attribute information by broadcasting to client.
In step 410, ownership media base station sends the programme content of P2P form to radio network, and the radio network broadcasted content is to client.
In step 412, discontinuous or the data check mistake of P2P packet number that client terminal to discover receives, then mean obliterated data, need to cross the P2P signaling according to the information exchanges such as address of peer in the Peer tabulation and in adjacent node, search corresponding data, the package informatin notice adjacent clients that other nodes are stored this client.If other nodes are without the bag of request, then super node can arrive in the ownership media base station and search data, and ownership media base station sends data to the request super node by peer-to-peer network.
In step 414, other nodes or super node can be crossed peer-to-peer network with the data communication device of request and send to requesting node.
The IP address of HMS and server info can be carried at and carry among the ESG to client, and the information such as professional coding and packet fragmentation can be issued the user by broadcasting or peer-to-peer network.Issue these information by radio network and usually will take larger bandwidth, under the consideration bandwidth occupancy is tried one's best little situation, can send by peer-to-peer network.
Fig. 5 is the structure chart according to an embodiment of content server of the present invention.As shown in Figure 5, this content server comprises broadcast data receiver module 51 and obliterated data acquisition module 52.Wherein, broadcast data receiver module 51 is used for receiving from digital broadcast network the content of multimedia of reciprocity form.Whether obliterated data acquisition module 52 exists for the content of multimedia of judging the reception of broadcast data receiver module is lost, and obtains missing data from peer-to-peer network when determining that existence is lost.
Fig. 6 is the structure chart according to another embodiment of content server of the present invention.As shown in Figure 6, this content server comprises broadcast data receiver module 61, obliterated data acquisition module 62 and peer-to-peer information registration receiver module 63.Wherein, broadcast data receiver module 61 is used for receiving from digital broadcast network the content of multimedia of reciprocity form.The burst information that peer-to-peer information registration receiver module 63 is used for to content server registration receive data receives Peer tabulation and program burst information.Obliterated data acquisition module 62 is used for registering the PEER tabulation of receiver module reception and the peer node that the program burst information is determined peer-to-peer network according to peer-to-peer information, and obtains missing data from the peer node of determining.
Fig. 7 is the structure chart according to an embodiment of client of the present invention.As shown in Figure 7, client comprises content storage module 71 and content broadcast module 72.Wherein, content storage module 71 is used for storing the content of multimedia of reciprocity form.Content broadcast module 72 is used for sending by digital broadcast network the content of multimedia of content storage module.
Fig. 8 is the structure chart according to another embodiment of client of the present invention.As shown in Figure 8, client comprises content storage module 81, content broadcast module 82 and peer-to-peer information administration module 83.Wherein, content storage module 81 is used for storing the content of multimedia of reciprocity form.Content broadcast module 82 is used for sending by digital broadcast network the content of multimedia of content storage module.Peer-to-peer information administration module 83 is used for the receiving node log-on message, safeguards and send Peer tabulation and program burst information.
It is to be noted, broadcast/group broadcast network of the present invention comprises broadcasting, the multicasting technology based on P2P net and digital broadcast network, includes but not limited to that Ethernet, WiFi, IPTV, BCMCS, MBMS, DVB, T-MMB and CMMB etc. are mutual, multicast and radio network.The P2P technology based on IP to network.
The method that content of multimedia is provided of the present invention, method of the present invention takes full advantage of the advantage of radio network and peer-to-peer network, has realized digital broadcasting/multicast and P2P technological incorporation.Send multi-medium data by radio network, missing data when obtaining broadcasting by peer-to-peer network, having overcome digital broadcasting/multicast can't be according to the problem of client situation transmission client missing data bag, utilize the P2P technology to alleviate the packet loss repeat requests pressure that server end needs clients to be processed, for the user provides high-quality multimedia service.
Description of the invention provides for example with for the purpose of describing, and is not exhaustively or limit the invention to disclosed form.Many modifications and variations are obvious for the ordinary skill in the art.Selecting and describing embodiment is for better explanation principle of the present invention and practical application, thereby and makes those of ordinary skill in the art can understand the various embodiment with various modifications that the present invention's design is suitable for special-purpose.
Claims (13)
1. method that content of multimedia is provided comprises step:
The content of multimedia of reciprocity form in the content server is sent to client by digital broadcast network;
The business guide information that will comprise channel and peer-to-peer information sends to client by digital broadcast network or peer-to-peer network, and described peer-to-peer information comprises burst information;
Peer tabulation and node attribute information are sent to client by digital broadcast network or peer-to-peer network, and described node attribute information comprises the burst that node receives;
When client determined that there is loss of data in the content of multimedia of the described reciprocity form of reception, other peer node from peer-to-peer network obtained described missing data.
2. the method that content of multimedia is provided according to claim 1 is characterized in that,
Described content server is ownership media base station, and described method also comprises step:
Client is registered this node according to described business guide information to ownership media base station;
Ownership media base station sends to client with described peer tabulation and program burst information.
3. the method that content of multimedia is provided according to claim 1 is characterized in that, the content of multimedia of the described reciprocity form content of multimedia that reciprocity burst or RTP bag form of serving as reasons.
4. the method that content of multimedia is provided according to claim 1 is characterized in that, comprises super node in the peer-to-peer network, and described super node can be by peer-to-peer network to content server request missing data.
5. the described method that content of multimedia is provided of any one in 4 according to claim 1 is characterized in that, described client determines that the content of multimedia of the described reciprocity form that receives exists the step of loss of data to comprise:
The numbering that client is judged receive data whether continuously and/or data check whether correct, if the numbering of receive data is discontinuous or data check makes a mistake, determine that then there is loss of data in the content of multimedia that receives.
6. the method that content of multimedia is provided according to claim 2 is characterized in that, the step that described client other nodes from peer-to-peer network obtain described missing data comprises:
Client is searched described missing data by reciprocity signaling according to address information in the described peer tabulation in adjacent node;
The package informatin that other nodes are stored this client is notified described client.
A content of multimedia system is provided, it is characterized in that, comprising:
Content server, the content of multimedia for storing reciprocity form sends described content of multimedia by digital broadcast network; Peer tabulation and node attribute information are sent to client, and described node attribute information comprises the burst that node receives;
Client is used for receiving the content of multimedia from the reciprocity form of described content server, receives described peer tabulation and node attribute information; When there is loss of data in the content of multimedia of the described reciprocity form of determining to receive, obtain described missing data by peer-to-peer network;
Service guideline server is used for preserving the business guide information that comprises channel and peer-to-peer information, and described business guide information is sent to described client, and described peer-to-peer information comprises burst information.
Content of multimedia according to claim 7 system is provided, it is characterized in that described client is carried out the node registration according to described business guide information to described content server.
Content of multimedia according to claim 8 system is provided, it is characterized in that described client is determined peer node in the described peer-to-peer network to obtain described missing data from described peer node according to described peer tabulation and program burst information.
According to claim 7 in 9 the described content of multimedia of any one system is provided, it is characterized in that, also comprise super node, be used for receiving the content of multimedia from the reciprocity form of described content server, other peer node request missing datas in described content server or the peer-to-peer network receive from the request of data of described client and return the data of request.
11. system according to claim 7 is characterized in that, described content server comprises:
Content storage module is for the content of multimedia of storing reciprocity form;
The content broadcast module is for the content of multimedia that sends the reciprocity form of described content storage module by digital broadcast network.
12. system according to claim 11 is characterized in that, described content server also comprises:
The peer-to-peer information administration module is used for the receiving node log-on message, safeguards and send described peer tabulation and program burst information.
13. a client is characterized in that, described client receives the business guide information that comprises channel and peer-to-peer information by digital broadcast network or peer-to-peer network, and described peer-to-peer information comprises burst information;
Described client comprises:
The broadcast data receiver module is for the content of multimedia that receives reciprocity form from digital broadcast network;
The obliterated data acquisition module, whether the content of multimedia of the reciprocity form that is used for judging that described broadcast data receiver module receives exists is lost, and obtains described missing data from peer-to-peer network determining to exist when losing;
Peer-to-peer information registration receiver module is used for the burst information to content server registration receive data, is used for receiving peer tabulation and program burst information;
Described obliterated data acquisition module is used for registering the described peer tabulation of receiver module reception and the peer node that the program burst information is determined peer-to-peer network according to described peer-to-peer information, and obtains described missing data from the peer node of determining.
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| CN106534898B (en) * | 2016-11-15 | 2019-03-15 | 中国联合网络通信集团有限公司 | A kind of method, apparatus and system obtaining stream medium data |
| CN109714221B (en) * | 2017-10-25 | 2022-11-01 | 阿里巴巴集团控股有限公司 | Method, device and system for determining network data packet |
| CN114257858B (en) * | 2022-03-02 | 2022-07-19 | 浙江宇视科技有限公司 | Content synchronization method and device based on emotion calculation |
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