CN101534204B - Streaming media information distribution system and method thereof and user end - Google Patents

Abstract

The invention provides a streaming media information distribution system, method and client. The system includes content distribution network central node, content distribution network edge node and point-to-point autonomous domain. Perform fragmentation processing and send it to user nodes. The present invention takes the content distribution network as the content core and the point-to-point as the service edge architecture, and performs fragmentation processing on the streaming media at the edge of the network. Through this system architecture, the existing content distribution network can be modified without or with a small modification Effectively enhance the service capability of content distribution network.

Description

Streaming media information distribution system and method and client

technical field

The embodiments of the present invention relate to the field of streaming media communication, in particular to a streaming media information distribution system and method and a client.

Background technique

Streaming Media (Streaming Media) refers to the continuous audio/video data stream transmitted and played in chronological order on the data network. Different from traditional playback methods, streaming media does not download the entire file before playing, but only caches part of the content, so that the streaming media data stream can be played while being transmitted, which saves download waiting time and storage space. Currently, streaming media distribution mainly adopts two technologies: content delivery network (Content Delivery Network; hereinafter referred to as: CDN) and peer-to-peer network (Peer-to-Peer Network; hereinafter referred to as: P2P).

A CDN is a distributed media service technology platform based on a client/server (Client/Server; hereinafter referred to as: C/S) structure. CDN is currently a platform that is widely used and has relatively high technical maturity. The current CDN service is mainly used in securities, finance and insurance, ISP, ICP, online transactions, portal websites, large and medium-sized companies, and online teaching. By adding a new layer of network architecture to the existing Internet, through intelligent strategies, the content that users need to access is distributed to the node closest to the user and with the best service quality, and at the same time, the user is automatically dispatched to the node through the background service. The corresponding nodes provide users with the best service. This solution effectively relieves Internet network congestion and improves the response speed of users accessing websites. Technically, it fully solves the problem of slow user access response speed due to reasons such as small network bandwidth, large user access volume, and uneven network distribution. Although CDN technology can accelerate streaming media distribution to a certain extent and realize download, live broadcast and on-demand broadcast, its core is still based on the structure of centralized servers, and it is difficult to reduce the cost of its expansion. In addition, the existing CDN technology still has certain defects in terms of adaptability and fault tolerance to burst traffic during peak periods. With the rapid increase of the user scale, great challenges are posed to the development of CDN applications.

P2P technology breaks the traditional C/S mode and is a technology platform based on peer-to-peer decentralized services. In the P2P network, each node has the same status, has the dual characteristics of client and server, and can serve as a service user and a service provider at the same time. P2P technology makes full use of the service capabilities of peer nodes, can avoid congestion at low expansion costs, and provide streaming services with high real-time and fault-tolerant performance for a large number of users. However, the existing simple P2P streaming media applications also have its problems. The prevalence of P2P streaming media services will bring about network traffic storms, lack of news supervision, vacuum in content copyright management, and prevalence of piracy, which may lead to vicious viruses and cause serious damage to telecom operators. These problems have hindered the further development of P2P streaming media technology into a reliable technology platform at the operator level.

Through the analysis of the advantages and disadvantages of CDN technology and P2P technology, it can be concluded that in terms of scalability, content copyright, QoS service, traffic management, etc., CDN and P2P technology have their own strengths and can basically complement each other completely. At present, there are three main solutions for P2P and CDN integration to realize P2P streaming services:

Solution 1: Rebuild the P2P CDN streaming media system

Fig. 1 is the structure diagram of the existing reconstructed P2P CDN streaming media system, as shown in Fig. 1, it is a schematic diagram of the system structure of P2P and CDN fusion in the prior art to realize P2P streaming media business solution one. In this system, the system service objects are P2P CDN users, and the original CDN users need to modify the client to obtain media content through the system. In this system, the P2P CDN central node fragments the media content according to the P2P protocol, and then uses the CDN technology to push the fragmented media content to the P2P CDN backbone edge nodes, P2P CDN backbone edge nodes and the end users covered by them As a peer entity, (User) jointly constitute a P2P autonomous domain, and use P2P technology to realize resource sharing in the domain, and no traffic exchange occurs between autonomous domains.

Solution 2: Transform the existing CDN to establish a P2P CDN streaming media system

Figure 2 is an architecture diagram of the existing P2P CDN streaming media system for large-scale transformation of the existing CDN network. In this system, the system service objects include both P2P CDN users and original CDN users, and there is no need to modify the clients of the original CDN users. The system adds some modules (which can be hardware or software) to the original CDN network, and uses the added modules to provide users with P2P streaming media services. In this system, a P2P CDN central node is added to the CDN central node as the content source of the P2P CDN system, and the original CDN central node is still used as the content source of the original CDN system. At the edge of the backbone network, add P2P CDN backbone edge nodes, fragment the media content at the CDN central node according to the P2P protocol, and push the fragmented media content from the P2P CDN central node to the P2P CDN backbone edge node using CDN technology , the P2P CDN backbone edge nodes and their covered end users (Users) as peer entities together constitute a P2P autonomous domain, in which P2P technology is used to realize resource sharing, and no traffic exchange occurs between autonomous domains. The original CDN central node and CDN edge node are reserved, and the distribution of traditional streaming media is realized according to the original CDN technology.

Solution 3: P2P CDN streaming media system for P2P fragmentation on the client side

Fig. 3 is an architecture diagram of an existing P2P CDN streaming media system that performs P2P fragmentation processing on the client side. In this system, the client adds a P2P fragmentation function to fragment the media stream. First, the initial client receives and plays the audio and video data of the content distribution network system from the server, fragments the audio and video data, and caches them by numbers; the subsequent client obtains the audio and video data from the server or the client through judgment, and plays the audio and video At the same time, the data fragments the audio and video data and caches them with numbers.

In the above scheme 1, for users who are P2P CDN users, the original CDN users need to modify the client before they can use the system to obtain media content. In addition, the system does not utilize the existing CDN system and cannot effectively protect the existing investment of operators. In the above-mentioned scheme two, the existing CDN has undergone large-scale transformation, and the transformation investment is large. In addition, in order to provide streaming media services for original CDN users and P2PCDN users at the same time, in the backbone network, both traditional streaming media and P2P fragmented media content must be transmitted, which consumes more backbone network bandwidth. In the third solution above, each client needs to add a fragmentation function, and for the same media content, fragmentation is performed on multiple clients, which increases the delay.

Contents of the invention

The object of the present invention is to provide a streaming media information distribution system and method and a client to solve the defects of the prior art.

The present invention provides a streaming media information distribution system, comprising a central node of a content distribution network located in a backbone network, an edge node of a content distribution network located at the edge of the backbone network, and a point-to-point autonomous domain, wherein the point-to-point autonomous domain includes:

The node index server is used to store the node information of the nodes in the point-to-point autonomous domain, and when receiving the streaming media content request information sent by a node, provide a node list for the node sending the request information, the node list includes Being able to provide the node with corresponding streaming media content node information;

The regional center server is used to store or receive the content through the edge node of the content distribution network when there is no node in the point-to-point autonomous domain that can provide the corresponding streaming media content for the node sending the request information The streaming media information sent by the central node of the distribution network and corresponding to the node sending the request information is sent to the node sending the request information after being fragmented according to the point-to-point protocol.

The present invention provides another streaming media information distribution system, comprising a central node of a content distribution network located in a backbone network, an edge node of a content distribution network located at the edge of the backbone network, and a point-to-point autonomous domain, and the edge node of a content distribution network includes:

A point-to-point fragmentation module, configured to redirect the node sending the request information to a node capable of providing the node sending the request information when there is no node in the point-to-point autonomous domain capable of providing corresponding streaming media content for the node sending the request information After providing it with a cache of the requested streaming media information, perform fragmentation processing on the streaming media information distributed by the cache, and send it to the node that sends the requested information;

The point-to-point autonomous domain includes:

The node index server is used to store the node information of the nodes in the point-to-point autonomous domain, and when receiving the streaming media content request information sent by a node, provide a node list for the node sending the request information, the node list includes Node information corresponding to the streaming media content can be provided for the node.

The present invention provides a streaming media information distribution method, comprising:

The requesting node sends streaming media content request information to the node index server;

The node index server searches for service node information capable of providing streaming media information for the requesting node in its stored node list;

If so, the node index server forms the service node list with the service node information found, and sends it to the requesting node, and the requesting node communicates with the service node to obtain the streaming media information of the service node ;

If not, the requesting node sends the streaming media content request information to the regional center server, and the regional center server judges whether there is corresponding streaming media information stored, and if so, the regional center server sends the corresponding The streaming media information is fragmented and sent to the requesting node; if not, the regional center server requests the corresponding streaming media information from the content distribution network, and fragments the obtained corresponding streaming media information processed and sent to the requesting node.

The present invention provides another method for distributing streaming media information, including:

The requesting node sends streaming media content request information to the node index server;

The node index server searches for service node information capable of providing streaming media information for the requesting node in its stored node list;

If so, the node index server forms the service node list with the service node information found, and sends it to the requesting node, and the requesting node communicates with the service node to obtain the streaming media information of the service node ;

If not, the requesting node requests the corresponding streaming media information from the content distribution network, and performs fragmentation processing on the corresponding streaming media information through the point-to-point fragmentation module of the edge node of the content distribution network, and sends it to the requesting node node.

The present invention provides a client, including:

A playback module, configured to obtain streaming media information from the data download module, and decode and play the streaming media information;

The data download module is used to establish and maintain a ring buffer for temporarily storing streaming media information downloaded from other clients, and also establishes a first-in-first-out data buffer for obtaining streaming media information from the ring buffer district;

The data scheduling module is used to obtain corresponding streaming media information from other clients according to the serial number information of the data blocks cached in the data buffer of the resource management module of other clients;

The resource management module is used to establish and maintain a local data state table, the identifier of the streaming media information cached in the data buffer in the data download module and the data blocks cached in the data buffer are stored in the local data state table number.

The streaming media information distribution system, method and client provided by the present invention retain the architecture and functions of the original CDN system at the backbone network level, make full use of the management mechanism of the CDN, and realize unified management of content, resource management and user management, and solve the problem of The content of the pure P2P network cannot be supervised, and the problem of effective user management cannot be carried out; P2P autonomous domains are introduced at the edge of the network, and the autonomous domains are independent of each other, effectively restricting P2P traffic within the P2P autonomous domain; the system forms a CDN-based The core, with P2P as the service edge architecture, fragments the traditional streaming media at the edge of the network according to the P2P protocol. Through this system architecture, operators can effectively transform the existing CDN without or with minor transformation. Improve CDN service capabilities. Fragment traditional streaming media at the edge of the network, and transmit traditional media streaming on the backbone network, which can provide streaming media services to existing CDN users without modifying existing CDN user clients.

Description of drawings

Fig. 1 is the structure diagram of the existing reconstruction P2P CDN streaming media system;

Figure 2 is an architecture diagram of the existing P2P CDN streaming media system for large-scale transformation of the existing CDN network;

Fig. 3 is the architecture diagram of the existing P2P CDN streaming media system that performs P2P fragmentation processing at the client;

Fig. 4 is the overall system frame diagram of the streaming media information distribution system embodiment of the present invention;

Fig. 5 is a media stream transmission process diagram of an embodiment of the streaming media information distribution method of the present invention

Fig. 6 is a system frame diagram of an embodiment of a streaming media information distribution system of the present invention;

Fig. 7 is a flowchart diagram of an embodiment of a method for distributing streaming media information according to the present invention;

FIG. 8 is a schematic flowchart of another embodiment of a method for distributing streaming media information according to the present invention;

Fig. 9 is a system frame diagram of another streaming media information distribution system embodiment of the present invention;

FIG. 10 is a flow diagram of another embodiment of a method for distributing streaming media information in the present invention;

FIG. 11 is a schematic flowchart of another embodiment of another method for distributing streaming media information in the present invention;

Fig. 12 is a schematic diagram of the client structure of the present invention.

Detailed ways

The technical solutions of the embodiments of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 4 is the overall system frame diagram of the embodiment of the streaming media information distribution system of the present invention, as shown in Fig. 4, in the new P2P streaming media content distribution system suitable for operators provided by the embodiment of the present invention, the backbone network layer retains The architecture and functions of the original CDN system, on the edge of the backbone network, construct multiple autonomous and mutually independent P2P streaming media networks, that is, P2P autonomous domains; users in each P2P autonomous domain (Users) communicate through P2P. interact. At the edge of the network, the traditional media stream is fragmented according to the P2P protocol, and the fragmented media information is sent to the user.

Fig. 5 is the media stream transmission process diagram of the embodiment of the streaming media information distribution method of the present invention, and this method is the media stream transmission process diagram of the P2P streaming media content distribution system suitable for operators; The streaming media information distribution system does not modify the original CDN system. In the original CDN network, the traditional unfragmented media stream is still transmitted. In the regional central node of the P2P autonomous domain, the traditional media stream is transmitted according to the P2P protocol. For fragmentation, for CDN users, the original CDN system can provide them with unfragmented media streams; for P2P users, the P2P streaming media system can provide them with fragmented P2P media streams.

Based on the above-mentioned system framework, the embodiments of the present invention provide two new P2P streaming media content distribution systems suitable for operators and a distribution method based on the systems, which are described in detail as follows.

Fig. 6 is a system frame diagram of an embodiment of a streaming media information distribution system of the present invention. As shown in Fig. 6, the system mainly implements fragmentation processing of streaming media in the P2P autonomous domain, and the system includes a CDN center located in the backbone network node, a CDN edge node located at the edge of the backbone network, and a point-to-point autonomous domain. The original CDN system architecture is retained in the backbone network, and the CDN central node includes content management server 11, CA12, WEB server 13, SP/CP server 14, network management and monitoring server 15, business statistics server 16, and AAA server 17 and a media resource library 18; the CDN central node is connected to the CDN edge node, and the CDN edge node is connected to the P2P autonomous domain, and the P2P autonomous domain includes: a node index server 31 and a regional center server 32 . Wherein the node index server 31 is used to store the node information of the nodes in the P2P autonomous domain, and when receiving the streaming media content request information sent by a node, provide a node list for the node sending the request information, in the node list Including node information that can provide corresponding streaming media content for the node; the regional center server 32 is used for when there is no node in the P2P autonomous domain that can provide corresponding streaming media content for the node that sends the request information, The stream media information corresponding to the node that sends the request information, which is stored or received by the content distribution network edge node from the content distribution network central node, is fragmented according to the P2P protocol and then sent to the sending station A node that requests information.

Several users 36 in the P2P autonomous domain use P2P technology to share resources in the domain. The node index server 31 stores the information of each node in the P2P autonomous domain, that is, the user. When a node requests information about a streaming media content, the node index server 31 provides the node with an A list of nodes that can provide the media content, and then the node selects a node to serve it according to a selection scheduling strategy. Each node in the system should periodically report the media content information stored and watched by itself to the node index server 31 . The regional center server 32 is the source server in the P2P autonomous domain, which stores popular media content. When a user requests a certain media content, a list of nodes that can provide the media content in the P2P autonomous domain will be obtained. If there is no node in the P2P autonomous domain that can provide The user provides this media content, then the user sends media content request information to the regional center server 32, and the regional center server 32 provides services for the user; if the media content requested by the user is not stored in the regional center server 32, then the regional center Server 32 requests corresponding media content to CDN network, because the media flow that obtains from CDN is the traditional unfragmented media flow, therefore, regional center server 32 carries out fragmentation according to P2P agreement this media flow, and fragmentation The final media stream is selectively stored and sent to the user.

In the P2P autonomous domain, a regional service management server 33, a network address translation (NetworkAddress Translation; hereinafter referred to as: NAT) traversal server 34 and a bandwidth compensation server 35 are also included, wherein the regional service management server 33 is used to control nodes in the point-to-point autonomous domain Perform authentication, authorization and statistics; the NAT traversal server 34 is used for traversal of NAT and firewall in the system; the bandwidth compensation server 35 is used for bandwidth compensation when the streaming media stream bandwidth is greater than the user's uplink bandwidth.

Specifically, the NAT traversal server 34 is responsible for the traversal of NAT and firewalls in the system; the regional service management server 33 is responsible for user authentication, authorization, statistics, etc. in the system. When a user requests a certain media content, it is first dispatched to In the regional business management server 33, the regional business management server 33 communicates with the operation support system in the system to authenticate and authorize users; in addition, the regional business management server 33 is also responsible for collecting and sorting out the statistical information reported by the client, and the The information is reported to the national business statistics system. The bandwidth compensation server 35 is mainly used for a network where the uplink bandwidth is smaller than the downlink bandwidth. For example, in an ADSL environment, the uplink bandwidth of the user is inconsistent with the downlink bandwidth. Compensated directly by the bandwidth compensation server.

The above five servers included in the P2P autonomous domain, namely the regional center server, node index server, NAT traversal server, regional business management It can also be realized by one physical entity, or more than two functions can be realized by only one physical entity.

In the streaming media information distribution system provided by the embodiment of the present invention, the structure and functions of the original CDN system are retained at the backbone network level, and the management mechanism of the CDN is fully utilized to realize unified management of content, resource management and user management, and solve the problem of The content of the pure P2P network cannot be supervised, and effective user management cannot be carried out; P2P autonomous domains are introduced at the edge of the network, and the autonomous domains are independent of each other, effectively restricting P2P traffic within the P2P autonomous domain; the system forms a CDN-based content core , with P2P as the service edge architecture, traditional streaming media is fragmented according to the P2P protocol at the edge of the network. Through this system architecture, operators can effectively upgrade the existing CDN without or with minor transformation. CDN service capabilities.

The system provided by this implementation realizes the integration of P2P and CDN, and integrates the two technologies to build a unified streaming media system, which has the following advantages: (1) Improve streaming service capabilities, and the introduction of P2P at the edge layer greatly reduces (2) The P2P integrated CDN network is manageable. In order to avoid traffic hedging on the backbone network, P2P traffic is strictly limited to the same edge node area through a centralized distributed architecture. , to avoid traffic disorder and storms on the telecommunications backbone network, and enhance the manageability of the network and the high reliability of services. Through the client, user monitoring and traffic supervision can be realized; (3) The combination of P2P and CDN enables limited service capabilities to provide streaming media services for more users, ensuring service quality; the application of P2P technology It can also more effectively prevent the impact on the quality of service caused by network jitter.

The system provided by this embodiment fully utilizes the existing CDN and does not modify the existing CDN or the modification is minor, which protects the existing investment of the operator. This system fragments the traditional streaming media at the edge of the network. On the backbone network, the traditional media streaming is still transmitted. It can provide streaming media services for existing CDN users without modifying the existing CDN user client. The system can be deployed in phases, and the business can be developed quickly. There is no need for overall transformation of the system. It only needs to establish a P2P autonomous domain at the edge of the network in the pilot area. For CDN users, they can continue to use the CDN to provide streaming media services.

Fig. 7 is a flowchart diagram of an embodiment of a method for distributing streaming media information of the present invention. As shown in Fig. 7, the method is a method for distributing streaming media information based on the above-mentioned streaming media information distributing system, including the following steps:

Step 1. The requesting node sends streaming media content request information to the node index server;

A requesting node is a node user who wants to request streaming media.

Step 2, the node index server searches the service node information that can provide streaming media information for the requesting node in its stored node list; if there is, the node information found is formed into a service node list and sent to The requesting node; if none, then perform step 4;

Step 3, the requesting node communicates with the nodes in the service node list to obtain the streaming media information of the nodes in the service node list, and the streaming media information distribution process ends;

Step 4, the requesting node sends the streaming media content request information to the regional center server;

Step 5, the regional center server judges whether there is corresponding streaming media information stored, and if so, the regional center server fragments the corresponding streaming media information and sends it to the requesting node; if not , the regional center server requests the content distribution network for the corresponding streaming media information, performs fragmentation processing on the obtained corresponding streaming media information, and sends it to the requesting node.

In the embodiment of the streaming media information distribution method of the present invention, the scheduling process is that after the user logs in, he requests scheduling from the P2P scheduling server, and the P2P scheduling server schedules the user to a certain P2P autonomous domain, and the user is scheduled to a certain P2P autonomous In the domain, if the load of the autonomous domain is full or failure occurs, it will be dispatched to other adjacent areas. The P2P scheduling server returns the IP address of the regional service management server in the P2P autonomous domain and the identification of the media content (hereinafter referred to as: ID) to the user, and the user requests to obtain the media content in the P2P autonomous domain. If there is no media content requested by the user in the P2P autonomous domain, CDN scheduling policy is required for scheduling. If there is no media content requested by the user in the P2P autonomous domain where the user resides, the regional central server of the P2P autonomous domain where the user resides requests media content from the CDN network. The regional center server first requests the Domain Name System (Domain Name System; hereinafter referred to as: DNS) to resolve the media Uniform Resource Locator (hereinafter referred to as: URL), and the DNS sends the global server load balancing (Global Server Load Balancing; hereinafter referred to as : GSLB) request analysis, GSLB determines the location of the regional center server according to DNS, and detects the health and load status of the CDN backbone edge server load balancing (Server Load Balancing; hereinafter referred to as: SLB) in the area where the regional center server is located; GSLB returns the IP address of the CDN edge node SLB to the DNS; DNS returns the resolution result to the regional central server of the P2P autonomous domain, that is, the IP address of the CDN edge node SLB; the regional central server of the P2P autonomous domain accesses the CDN edge node SLB; The CDN edge node SLB detects the health, content, load, and proximity of the cache (hereinafter referred to as: CACHE), selects the optimal CACHE, and redirects the regional center server to the selected CACHE; the CACHE provides media to the regional center server The regional center server fragments the media stream according to the P2P protocol, and provides the media stream to the user.

Fig. 8 is a schematic flow diagram of another embodiment of a method for distributing streaming media information according to the present invention. As shown in Fig. 8, this implementation provides a system based on the aforementioned fragmentation processing of streaming media information in the P2P autonomous domain to realize streaming media The preferred embodiment process of distribution includes the following steps:

Step 100, the user 36 visits the portal website, obtains the authentication of the authentication and billing system, that is, the operation support system 20, and obtains the IP address of the P2P scheduling server 24 and the URL of a certain media content;

Step 101, the user requests scheduling from the P2P scheduling server 24;

Step 102, the P2P scheduling server 24 schedules the user to a certain P2P autonomous domain. The user is scheduled to a certain P2P autonomous domain according to the principle of proximity. If the autonomous domain is full or fails, the user is scheduled to other neighboring areas. The P2P scheduling server returns the IP address of the regional service management server in the P2P autonomous domain and the ID of the media content to the user;

Step 103, the user requests authorization from the regional service management server 33 in the P2P autonomous domain;

Step 104, the regional service management server 33 confirms to the operation support system 20 whether the user is a legitimate user;

Step 105, the regional business management server 33 authenticates and authorizes the user, and returns the authorization information and the IP address of the node index server 31 in the P2P autonomous domain to the user;

Step 106, the user requests the service node list from the node index server 31;

Step 107, the node index server 31 checks the node list, judges according to the ID of the media content whether the node in the P2P autonomous domain contains the content required by the user, if there is a node in the P2P autonomous domain that contains the content required by the user, then according to the node selection strategy, Provide users with a set of service nodes; if there are not enough excellent nodes in the P2P autonomous domain to provide P2P services, the bandwidth compensation server can be used to provide streaming media content. Otherwise, if the nodes (including the bandwidth compensation server) in the P2P autonomous domain do not contain the media content requested by the user, then step 111 is performed;

Step 108, the user communicates with the group of nodes to obtain the information of the media resource block contained in each node;

Step 109, the user node determines the node currently serving itself by selecting a strategy and a scheduling algorithm, and sends a media content request;

Step 110, the requested node selectively sends media content to the user through a blocking strategy;

Step 111, if there is no node (including the bandwidth compensation server) in the P2P autonomous domain that contains the media content requested by the user, the user sends the media-related information to the regional center server of the P2P autonomous domain where the user is located to request the media content;

Step 112, if the regional central server 32 of the P2P autonomous domain contains media content, then the regional central server 32 provides services for the user;

Step 113, if the regional center server 32 does not contain the media content, then request DNS23 to resolve the URL of the media content;

Step 114, DNS23 requests resolution to GSLB25;

Step 115, GSLB25 determines the location of the regional center server 32 according to the DNS23, and detects the health and load status of the CDN backbone edge SLB26 in the region where the regional center server 32 is located;

Step 116, GSLB25 returns the IP address of CDN edge node SLB26 in this area to DNS23;

Step 117, DNS23 returns the analysis result to the regional center server of the P2P autonomous domain, that is, the IP address of the CDN edge node SLB26;

Step 118, the regional center server 32 of the P2P autonomous domain accesses the CDN edge node SLB26;

Step 119, the CDN edge node SLB26 detects the health, content, load and proximity of the CACHE22, selects the optimal CACHE22, and redirects the regional center server to the selected CACHE;

Step 120, CACHE22 provides the media stream to the regional center server;

Step 121, the regional center server 32 fragments the media stream according to the P2P protocol and provides the fragmented media stream to the user.

In the method provided by this implementation, the edge of the network centrally fragments the traditional streaming media without adding a fragmentation function to each client. After the client obtains the media stream after P2P fragmentation from the regional center server, it directly uses P2P technology sharing. On the backbone network, traditional media streams are still transmitted. In this way, services can be provided for existing CDN users in C/S mode, and services can also be provided for P2P users.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

Fig. 9 is a system frame diagram of another streaming media information distribution system embodiment of the present invention. As shown in Fig. 9, the system mainly implements fragmentation processing of streaming media at the edge of the CDN network, and the system includes content located in the backbone network A central node of the distribution network, an edge node of the content distribution network located at the edge of the backbone network, and a point-to-point autonomous domain. The original CDN system architecture is retained in the backbone network, and the CDN central node includes content management server 11, CA12, WEB server 13, SP/CP server 14, network management and monitoring server 15, business statistics server 16, and AAA server 17 and media resource library 18; CDN central node is connected with CDN edge node, and CDN edge node is connected with P2P autonomous domain, and described content distribution network edge node comprises point-to-point fragmentation module 21, and point-to-point fragmentation module 21 is used for when described point-to-point When there is no node in the autonomous domain that can provide the corresponding streaming media content for the node that sends the request information, redirect the node that sends the request information to a Cache that can provide it with the requested streaming media information Afterwards, the stream media information distributed by the Cache is fragmented, and sent to the node sending the request information; the point-to-point autonomous domain includes a node index server 31, and the node index server 31 is used to store the point-to-point The node information of the nodes in the autonomous domain, and when receiving the streaming media content request information sent by a node, provide a node list for the node that sent the request information, and the node list includes the information that can provide the corresponding streaming media content for the node. The node information of the content.

Several users 36 in the P2P autonomous domain use P2P technology to share resources in the domain. The node index server 31 stores the information of each node in the P2P autonomous domain, that is, the user. When a node requests information about a streaming media content, the node index server 31 provides the node with an A list of nodes that can provide the media content, and then the node selects a node to serve it according to a selection scheduling strategy. Each node in the system should periodically report the media content information stored and watched by itself to the node index server 31 . A P2P fragmentation module 21 is added to the CDN edge node. After the CDN relocates the user to a certain Cache according to the load balancing strategy, the P2P fragmentation module 21 performs fragmentation processing on the media stream distributed by the Cache according to the P2P protocol, and the fragmented The media content is sent to the user.

In the P2P autonomous domain, it also includes a regional business management server 33, a NAT traversal server 34 and a bandwidth compensation server 35, wherein the regional business management server 33 is used to authenticate, authorize and count the nodes in the point-to-point autonomous domain; the NAT traversal server 34 It is used for traversal of NAT and firewall in the system; the bandwidth compensation server 35 is used to perform bandwidth compensation when the streaming media stream bandwidth is greater than the user's uplink bandwidth.

Specifically, the NAT traversal server 34 is responsible for the traversal of NAT and firewalls in the system; the regional service management server 33 is responsible for user authentication, authorization, statistics, etc. in the system. When a user requests a certain media content, it is first dispatched to In the regional business management server 33, the regional business management server 33 communicates with the operation support system in the system to authenticate and authorize users; in addition, the regional business management server 33 is also responsible for collecting and sorting out the statistical information reported by the client, and the The information is reported to the national business statistics system. The bandwidth compensation server 35 is mainly used for a network where the uplink bandwidth is smaller than the downlink bandwidth. For example, in an ADSL environment, the uplink bandwidth of the user is inconsistent with the downlink bandwidth. Compensated directly by the bandwidth compensation server.

The above four servers included in the P2P autonomous domain, that is, node index server, NAT traversal server, regional service management server and bandwidth compensation server are divided according to logical functions. Each function can be realized by multiple physical entities in the network implementation, or Two or more functions may be realized by only one physical entity.

In the streaming media information distribution system provided by the embodiment of the present invention, the structure and functions of the original CDN system are retained at the backbone network level, and the management mechanism of the CDN is fully utilized to realize unified management of content, resource management and user management, and solve the problem of The content of the pure P2P network cannot be supervised, and effective user management cannot be carried out; P2P autonomous domains are introduced at the edge of the network, and the autonomous domains are independent of each other, effectively restricting P2P traffic within the P2P autonomous domain; the system forms a CDN-based content core , with P2P as the service edge architecture, traditional streaming media is fragmented according to the P2P protocol at the edge of the network. Through this system architecture, operators can effectively upgrade the existing CDN without or with minor transformation. CDN service capabilities.

The system provided by this implementation realizes the integration of P2P and CDN, and integrates the two technologies to build a unified streaming media system, which has the following advantages: (1) Improve streaming service capabilities, and the introduction of P2P at the edge layer greatly reduces (2) The P2P integrated CDN network is manageable. In order to avoid traffic hedging on the backbone network, P2P traffic is strictly limited to the same edge node area through a centralized distributed architecture. , to avoid traffic disorder and storms on the telecommunications backbone network, and enhance the manageability of the network and the high reliability of services. Through the client, user monitoring and traffic supervision can be realized; (3) The combination of P2P and CDN enables limited service capabilities to provide streaming media services for more users, ensuring service quality; the application of P2P technology It can also more effectively prevent the impact on the quality of service caused by network jitter.

The system provided by this embodiment fully utilizes the existing CDN and does not modify the existing CDN or the modification is minor, which protects the existing investment of the operator. This system fragments the traditional streaming media at the edge of the network. On the backbone network, the traditional media streaming is still transmitted. It can provide streaming media services for existing CDN users without modifying the existing CDN user client. The system can be deployed in phases, and the business can be developed quickly. There is no need for overall transformation of the system. It only needs to establish a P2P autonomous domain at the edge of the network in the pilot area. For CDN users, they can continue to use the CDN to provide streaming media services.

Fig. 10 is a flow diagram of an embodiment of a method for distributing streaming media information of the present invention. As shown in Fig. 10, the method is a method for distributing streaming media information based on the above-mentioned streaming media information distributing system, including the following steps:

Step 10, the request node sends streaming media content request information to the node index server;

Step 20, the node index server searches for service node information that can provide streaming media information for the requesting node in its stored node list; if there is, then perform step 30; if not, then perform step 40;

Step 30, the node index server forms the searched service node information into a service node list, and sends it to the requesting node, and the requesting node communicates with the service node to obtain the streaming media information of the service node;

Step 40, the requesting node requests the corresponding streaming media information from the content distribution network, and fragments the corresponding streaming media information through the point-to-point fragmentation module of the edge node of the content distribution network, and sends it to the requesting node .

In another streaming media information distribution method embodiment of the present invention, the scheduling process is that after the user logs in, he requests scheduling from the P2P scheduling server, and the P2P scheduling server schedules the user to a certain P2P autonomous domain, and the user is scheduled to a certain P2P In an autonomous domain, if the load of the autonomous domain is full or failure occurs, it will be dispatched to other adjacent areas. The P2P scheduling server returns the IP address of the regional service management server in the P2P autonomous domain and the ID of the media content to the user, and the user requests to obtain the media content in the P2P autonomous domain. If there is no media content requested by the user in the P2P autonomous domain, it is necessary to use the CDN scheduling policy for scheduling. If there is no user requesting media content in the P2P autonomous domain where the user resides, the user requests DNS to analyze the URL information of the streaming media, and DNS requests GSLB for resolution. , GSLB determines the location of the user according to DNS, and detects the health and load status of the CDN backbone edge node SLB in the area where the user is located; GSLB returns the IP address of the CDN edge node SLB in the area to DNS; DNS returns the resolution result to the user , that is, the IP address of the CDN edge node SLB; the user accesses the CDN edge node SLB; the CDN edge node SLB detects the health, content, load, and proximity of the CACHE, selects the optimal CACHE, and redirects the user to the selected CACHE; the P2P fragmentation module fragments the media stream distributed by CACHE according to the P2P protocol and sends the fragmented media stream to the user.

Fig. 11 is a schematic flow diagram of another embodiment of another method for distributing streaming media information in the present invention. As shown in Fig. 11, this implementation provides a system based on the aforementioned fragmentation processing of streaming media information at CDN edge nodes to realize streaming The preferred embodiment process of media distribution includes the following steps:

Step 200, the user visits the portal website, obtains the authentication of the authentication and billing system, that is, the operation support system 20, and obtains the IP address of the P2P scheduling server 24 and the URL of a certain media content;

Step 201, the user requests scheduling from the P2P scheduling server 24;

Step 202 , the P2P scheduling server 24 schedules users to a certain P2P autonomous domain according to the principle of proximity, and if the autonomous domain is full or fails, it is scheduled to other adjacent areas. The P2P scheduling server returns the IP address of the regional service management server in the P2P autonomous domain and the ID of the media content to the user;

Step 203, the user requests authorization from the regional service management server 33 in the P2P autonomous domain;

Step 204, the regional business management server 33 confirms to the operation support system 20 whether the user is a legitimate user;

Step 205, the regional business management server 33 authenticates and authorizes the user, and returns the authorization information and the IP address of the node index server 31 in the P2P autonomous domain to the user;

Step 206, the user requests the service node list from the node index server 31;

Step 207, the node index server checks 31 to see the node list, judges according to the ID of the media content whether the node in the P2P autonomous domain contains the content required by the user, if there is a node in the P2P autonomous domain that contains the content required by the user, then according to the node selection strategy , to provide users with a set of service nodes, if there are not enough excellent nodes in the P2P autonomous domain to provide P2P services, then use the bandwidth compensation server to provide content; otherwise, if the nodes in the P2P autonomous domain (including the bandwidth compensation server) do not contain the media content, go to step 211;

Step 208, the user communicates with the group of nodes to obtain the information of the media resource block contained in each node;

Step 209, the user node determines the node currently serving itself by selecting a strategy and a scheduling algorithm, and sends a media content request;

Step 210, the requested node selectively sends media content to the user through a blocking strategy;

Step 211, if there is no node (including bandwidth compensation server) in the P2P autonomous domain containing the media content requested by the user, the user requests DNS23 to resolve the media URL;

Step 212, DNS23 requests resolution to GSLB25;

Step 213, GSLB25 determines the location of the user according to DNS23, and detects the health and load status of the CDN backbone edge SLB26 in the area where the user is located;

Step 214, GSLB25 returns the IP address of CDN edge node SLB26 in this area to DNS;

Step 215, DNS23 returns the analysis result to the user, that is, the IP address of CDN edge node SLB26;

Step 216, the user accesses the CDN edge node SLB26;

Step 217, the CDN edge node SLB26 detects the health, content, load and proximity of the CACHE22, selects the optimal CACHE22, and redirects the user to the selected CACHE22;

Step 218, the P2P fragmentation module of the edge node of the CDN network where CACHE22 is located fragments the media stream distributed by CACHE22 according to the P2P protocol, and sends the fragmented media stream to the user.

In the method provided by this implementation, the edge of the network centrally fragments the traditional streaming media without adding a fragmentation function to each client. After the client obtains the media stream after P2P fragmentation from the regional center server, it directly uses P2P technology sharing. On the backbone network, traditional media streams are still transmitted. In this way, services can be provided for existing CDN users in C/S mode, and services can also be provided for P2P users.

Those of ordinary skill in the art can understand that all or part of the steps for realizing the above-mentioned method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other various media that can store program codes.

FIG. 12 is a structural diagram of the client of the present invention. As shown in FIG. 12 , the client includes a playback module 1 , a data download module 2 , a data scheduling module 3 and a resource management module 4 . Wherein the playback module 1 is used to obtain streaming media information from the data download module 2, and decodes and plays the streaming media information; the data download module 2 is used to set up and maintain the streaming media downloaded from other clients for temporary storage The ring buffer of information also sets up a first-in-first-out data buffer for obtaining streaming media information from the ring buffer; data scheduling module 3 is used for buffering in the data buffer of resource management module 4 according to other clients The serial number information of the data block, obtains corresponding streaming media information from described other clients; Resource management module 4 is used for establishing and maintaining the local data state table, the data buffering in the data download module is stored in the local data state table The identifier of the streaming media information cached in the area and the number of the data block cached in the data buffer.

Specifically, the playback module 1 obtains the streaming media data from the data buffer maintained by the data download module 2, and can play the streaming media data in two ways: the first way is to set a built-in player in the playback module 1 to complete The decoding, playback and synchronization functions of audio and video data in streaming media data in various formats; various decoders need to be implemented for streaming media data in different formats, and the decoder will send the decoded audio and video data to playback The display module of the player is used for playing; the second way is to use an existing player, such as RealPlayer of RealNetwork Company or MediaPlayer of Microsoft Company. In this manner, the playback module 1 should implement a simple streaming media server function, that is, allow the player to use a certain protocol to obtain streaming media data from the playback module 1 for playback. The playback module 1 should at least realize the HTTP server function, and listen on the loopback address (127.0.0.1), so that RealPlayer or MediaPlayer can connect the local port through the HTTP protocol to obtain streaming media data and play.

In practical applications, one of the two methods can be selected according to requirements to realize the function of the playback module. Generally speaking, implementing a built-in player requires a comprehensive understanding of the formats of various streaming media data in order to implement a decoder, which is usually difficult; but this method allows more flexible and effective control of the data, and can be independently designed Client player, designed a more friendly and easy-to-operate interface for users. It is relatively easier to implement an HTTP server, without considering the function and quality of the player, all that needs to be done is to accept the request of the player according to the HTTP protocol, and send the data sequentially.

The functions of the data downloading module 2 are all designed for realizing data downloading. Its function is described as follows: First, the data download module 2 establishes and maintains a circular buffer in the memory to read and write data quickly, without the need for frequent and large-scale internal copying of data. This ring buffer is used to temporarily store streaming media data downloaded from other peers, that is, other clients, for local consumption and download by other peers. This ring buffer will be maintained periodically and provides a synchronization mechanism for read and write operations. When the data in the buffer fills three quarters of the buffer, no more data will be written to it, and when the data in the buffer is less than one quarter of the buffer, data cannot be deleted from it. Secondly, the data download module 2 establishes a first-in-first-out buffer in the memory, which continuously obtains media content sequentially from the ring buffer, and pushes the media content to the player for users to watch. Setting double buffers can reduce the impact of download rate jitter on the one hand, and distribute content between nodes more efficiently on the other hand.

In addition, the data download module 2 is responsible for establishing a direct connection with the bandwidth compensation server in the P2P autonomous domain or the data download module 2 of the available downloader to obtain data, and preferentially obtains data from other downloaders. The data is only obtained from the bandwidth compensation server when the data is obtained, so as to reduce the network pressure of the bandwidth compensation server, so that it can serve more downloaders.

In addition, the data download module 2 is also responsible for establishing network listening, so that other peers can establish network connections with it, so as to contribute the streaming media data in the buffer of the local data download module.

The main function of the data scheduling module 3 is to obtain media data from other nodes as soon as possible according to the "Buffermap" (storing the information of the data block contained in the node) information of the node that can provide media content. Different scheduling algorithms have a great impact on the performance of data distribution in the whole system. There are two main data scheduling constraints: the principle of rare data priority and the principle of playback time priority. When the node first joins, there is no data to provide upload service, so it is necessary to obtain a piece of data as soon as possible, and the node starts to provide data distribution service after obtaining a complete piece of data; however, the speed of downloading rare data is often slow, so in The first data block is selected in a random manner, and after the download of the first data block is completed, the first two scheduling strategies are applied.

The resource management module 4 establishes and maintains a local data state table in the internal memory. On the one hand, the local data state table records the identifier of buffering media content in the data buffer of the data download module 2 of the current client, and the node periodically Send it to the node index server in the P2P autonomous domain; in addition, the number of each data block cached in the buffer is recorded in the local data state table, which can be realized by the mapping "buffermap" of the cached data, and each "buffermap" The bit corresponds to a data fragment, and "0" and "1" are used to indicate whether the node contains the data fragment information. When other nodes request a connection to the node, the node returns "buffermap".

The client provided in this embodiment further includes an instruction analysis module 5 for receiving instruction information, analyzing the instruction information, and sending the analysis result. The instruction analysis module 5 is equivalent to a controller of a P2P streaming media system node, and is connected to various parts of a P2P streaming media system node. First, the instruction analysis module 5 obtains the instruction message sent from the server or other nodes, and analyzes it, and then transmits the analysis result to other modules, and the corresponding module will further process it; secondly, the user's demand or feedback information will be After being passed to the instruction analysis module 5, the instruction analysis module 5 will organize this information into an instruction message after analyzing and interacting with other modules, and then send it to the server or other P2P streaming media system nodes.

This client provided by the present embodiment also includes registration module 6 to be used for completing user's registration and login; When new user joins system, this registration module 6 is responsible for registering with the user management module in the system; When the user requests a service, first After logging in through the registration module 6, the user after logging in can perform various operations. NAT and firewall detection module 7 are used to detect whether the client itself is in the firewall or in the intranet, and the type of NAT and firewall; business statistics module 8 is used to perform business statistics and report statistical result information; business statistics module 8 is responsible for the business statistics of the user end, and reports it to the regional business management server; the authentication and authorization module 9 is used to authenticate and authorize the usage of the user; the authentication and authorization module 9 is responsible for authenticating and authorizing the usage of the user, including the DRM controller.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (14)

1. a streaming media information distribution system comprises the content distributing network Centroid that is arranged in backbone network, the content distributing network fringe node that is positioned at described backbone network edge and point-to-point autonomous territory, it is characterized in that, described point-to-point autonomous territory comprises:

The node index server, be used to store the nodal information of described point-to-point autonomous territory interior nodes, and when receiving the streaming medium content solicited message of node transmission, for the node that sends described request information provides node listing, comprise the nodal information that the streaming medium content of correspondence can be provided for described node in the described node listing;

The regional center server, the node of corresponding streaming medium content is used for when can not be provided for the node of described transmission described request information in the described point-to-point autonomous territory, with storage or receive the stream media information of described content distributing network Centroid node correspondence that send, described transmission solicited message by described content distributing network fringe node, carry out sending to after burst is handled the node of described transmission described request information according to point-to-point protocol.

2. streaming media information distribution system according to claim 1 is characterized in that, described point-to-point autonomous territory also comprises:

The area business management server is used for the node in described point-to-point autonomous territory is authenticated, authorizes and adds up;

Network address translation is passed through server, is used for carrying out passing through of system's network address translation and fire compartment wall;

The bandwidth compensation server when being used for the stream media code stream bandwidth greater than the user uplink bandwidth, carries out bandwidth compensation.

3. a stream media information distribution method is characterized in that, comprising:

Requesting node sends the streaming medium content solicited message to the node index server;

Described node index server is searched the service node information that stream media information can be provided for the described request node in the node listing of its storage;

If have, then described node index server becomes the service node listing with the service node information sets that finds, and sends to the described request node, and described request node and described service node communicate, and obtain the stream media information of described service node;

If do not have, then the described request node sends described streaming medium content solicited message to the regional center server, described regional center server judges whether to store corresponding stream media information, if have, then described regional center server carries out the burst processing with the stream media information of described correspondence, and sends to the described request node; If do not have, then described regional center server is to the stream media information of content distributing network request correspondence, and the stream media information of the described correspondence that will obtain carries out the burst processing, and sends to the described request node.

4. stream media information distribution method according to claim 3, it is characterized in that, described regional center server is to the stream media information of content distributing network request correspondence, and the stream media information of the described correspondence that will obtain carries out burst and handle, and sends to the described request node and comprise:

Described regional center server conducts interviews to the content distributing network fringe node server load balancing of its region;

Described content distributing network fringe node server load balancing selects to provide for the described request node high-speed cache of stream media information, and the described request node is redirected to described high-speed cache;

Described high-speed cache provides stream media information to described regional center server;

The described stream media information that described regional center server will obtain carries out burst to be handled, and sends to the described request node.

5. stream media information distribution method according to claim 4 is characterized in that, described regional center server conducts interviews to the content distributing network fringe node server load balancing of its region and comprises:

Described regional center server requests domain name system is resolved the URL(uniform resource locator) information of the stream media information that the described request node is asked;

Domain name system request GSLB is resolved the URL(uniform resource locator) information of described stream media information;

Described GSLB is determined described regional center server location according to domain name system information, and returns the IP address information of the content distributing network fringe node server load balancing of described regional center server region to the domain name system;

The domain name system returns the IP address information of described content distributing network fringe node server load balancing to described regional center server;

Described regional center server is visited described content distributing network fringe node server load balancing according to described IP address information.

6. stream media information distribution method according to claim 5 is characterized in that, the described request node also comprised before the node index server sends the streaming medium content solicited message:

The described request node conducts interviews to stream media information, obtains the IP address information of point-to-point dispatch server and the URL(uniform resource locator) information of described stream media information;

The described request node sends dispatch request information to the point-to-point dispatch server of the IP of described point-to-point dispatch server address information correspondence;

Described point-to-point dispatch server is in the point-to-point autonomous territory of described request node scheduling to, and the IP address information of the area business management server in described point-to-point autonomous territory and the id information of described stream media information are returned to the described request node;

Described area business management server authenticates the described request node, and returns the IP address information of described node index server to the described request node.

7. stream media information distribution method according to claim 6 is characterized in that, described area business management server authenticates the described request node and comprises:

The described request node sends authorization requests information to the area business management server of the IP of described area business management server address information correspondence;

Described area business management server carries out legal authentication by OSS to the described request node;

Described area business management server carries out authorization identifying to the described request node, and the IP address information of the node index server in authorization message and described point-to-point autonomous territory returns to the described request node.

8. streaming media information distribution system, comprise the content distributing network Centroid that is arranged in backbone network, the content distributing network fringe node that is positioned at described backbone network edge and point-to-point autonomous territory, it is characterized in that described content distributing network fringe node comprises:

Point-to-point burst module, the node of corresponding streaming medium content is used for when can not be provided for the node that sends solicited message in the described point-to-point autonomous territory, the node that will send solicited message be redirected to can provide the high-speed cache of the stream media information of being asked for it after, stream media information to described high-speed cache distribution carries out the burst processing, and sends to the node that sends solicited message;

Described point-to-point autonomous territory comprises:

The node index server, be used to store the nodal information of described point-to-point autonomous territory interior nodes, and when receiving the streaming medium content solicited message of node transmission, for the node that sends described request information provides node listing, comprise the nodal information that the streaming medium content of correspondence can be provided for described node in the described node listing.

9. streaming media information distribution system according to claim 8 is characterized in that, described point-to-point autonomous territory also comprises:

The area business management server is used for the node in described point-to-point autonomous territory is authenticated, authorizes and adds up;

Network address translation is passed through server, is used for carrying out passing through of system's network address translation and fire compartment wall;

The bandwidth compensation server when being used for the stream media code stream bandwidth greater than the user uplink bandwidth, carries out bandwidth compensation.

10. a stream media information distribution method is characterized in that, comprising:

Requesting node sends the streaming medium content solicited message to the node index server;

Described node index server is searched the service node information that stream media information can be provided for the described request node in the node listing of its storage;

If have, then described node index server becomes the service node listing with the service node information sets that finds, and sends to the described request node, and described request node and described service node communicate, and obtain the stream media information of described service node;

If do not have, then the described request node is to the stream media information of content distributing network request correspondence, and the point-to-point burst module by the content distributing network fringe node carries out burst with the stream media information of described correspondence and handle, and sends to the described request node.

11. stream media information distribution method according to claim 10, it is characterized in that, the described request node is to the stream media information of content distributing network request correspondence, and the point-to-point burst module by the content distributing network fringe node carries out burst with the stream media information of described correspondence and handles, and sends to the described request node and comprise:

The described request node conducts interviews to the content distributing network fringe node server load balancing of its region;

Described content distributing network fringe node server load balancing selects to provide for the described request node high-speed cache of stream media information, and the described request node is redirected to described high-speed cache;

The point-to-point burst module of described high-speed cache place content distributing network fringe node is carried out the burst processing to the stream media information of described high-speed cache distribution, and sends to the described request node.

12. stream media information distribution method according to claim 11 is characterized in that, the described request node conducts interviews to the content distributing network fringe node server load balancing of its region and comprises:

Described request node request domain name system is resolved the URL(uniform resource locator) information of its stream media information of asking;

Domain name system request GSLB is resolved the URL(uniform resource locator) information of described stream media information;

Described GSLB is determined the regional center server location according to domain name system information, and returns the IP address information of the content distributing network fringe node server load balancing of described regional center server region to the domain name system;

The domain name system returns the IP address information of described content distributing network fringe node server load balancing to described regional center server;

The described request node is visited described content distributing network fringe node server load balancing according to described IP address information.

13. stream media information distribution method according to claim 12 is characterized in that, the described request node also comprised before the node index server sends the streaming medium content solicited message:

The described request node conducts interviews to stream media information, obtains the IP address information of point-to-point dispatch server and the URL(uniform resource locator) information of described stream media information;

The described request node sends dispatch request information to the point-to-point dispatch server of the IP of described point-to-point dispatch server address information correspondence;

Described point-to-point dispatch server is in the point-to-point autonomous territory of described request node scheduling to, and the IP address information of the area business management server in described point-to-point autonomous territory and the identification information of described stream media information are returned to the described request node;

Described area business management server authenticates the described request node, and returns the IP address information of described node index server to the described request node.

14. stream media information distribution method according to claim 13 is characterized in that, described area business management server authenticates the described request node and comprises:

The described request node sends authorization requests information to the area business management server of the IP of described area business management server address information correspondence;

Described area business management server carries out legal authentication by OSS to the described request node;

Described area business management server carries out authorization identifying to the described request node, and the IP address information of the node index server in authorization message and described point-to-point autonomous territory returns to the described request node.

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