WO2009152754A1 - 一种基于对等存储网络提供内容的方法、系统和设备 - Google Patents

一种基于对等存储网络提供内容的方法、系统和设备 Download PDF

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Publication number
WO2009152754A1
WO2009152754A1 PCT/CN2009/072277 CN2009072277W WO2009152754A1 WO 2009152754 A1 WO2009152754 A1 WO 2009152754A1 CN 2009072277 W CN2009072277 W CN 2009072277W WO 2009152754 A1 WO2009152754 A1 WO 2009152754A1
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Prior art keywords
peer
media content
peer storage
node
storage node
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PCT/CN2009/072277
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English (en)
French (fr)
Inventor
黄世碧
何靖桐
吴向阳
温立
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华为技术有限公司
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Publication of WO2009152754A1 publication Critical patent/WO2009152754A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/01Protocols
    • H04L67/10Protocols in which an application is distributed across nodes in the network
    • H04L67/104Peer-to-peer [P2P] networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/50Network services
    • H04L67/56Provisioning of proxy services
    • H04L67/568Storing data temporarily at an intermediate stage, e.g. caching

Definitions

  • the present invention relates to the field of communications, and in particular, to a method, system and device for providing content based on a peer-to-peer storage network. Background technique
  • the streaming media service or the network television (IP Television, hereinafter referred to as IPTV) service is a new service that has developed rapidly in recent years.
  • the streaming media service uses streaming technology to transmit multimedia files, including video, over the packet switched network. , audio and other file content. Users can access the content immediately without having to download it.
  • the key technology for streaming media implementation is streaming technology. Streaming technology processes continuous video and audio information and puts it on the server, allowing users to watch and listen while downloading, without having to wait for the entire file to download to themselves.
  • the network transmission technology that can be viewed after the machine.
  • FIG. 1 is a schematic diagram of the working process of a CDN network provided by the prior art.
  • the CDN is generally composed of a central server (Center Server, hereinafter referred to as CS) and multiple edge servers (Edge).
  • Server hereinafter referred to as: ES
  • ES constitutes a content network for delivering content to end users
  • ICP Server Internet Content Provider Server
  • ICP Server Internet Content Provider Server
  • Locator Uniform Resource Locator, hereinafter referred to as: URL
  • RRS Request Routing Server
  • FIG. 2 is a schematic diagram of a hierarchical CDN content network of a three-layer deployment provided by the prior art, which is composed of a primary CS (High-CS, below). Referred to as H-CS), secondary CS (Low-CS, hereinafter referred to as L-CS) and edge ES.
  • H-CS primary CS
  • L-CS secondary CS
  • edge ES edge ES
  • Storage redundancy The content stored on the L-CS is mainly released by the H-CS. According to the principle provided by the nearest one, it is necessary to copy the content from the H-CS to the L-CS node close to the user.
  • the L-CS therefore has A large number of copies of the content on the H-CS, and the content between the L-CS and the L-CS in the hierarchical CDN cannot be shared, thus causing a large amount of storage redundancy on the intermediate cache node L-CS. From the network structure of the hierarchical CDN network, it can be seen that the more network layers in the CDN and the larger the scale, the greater the redundancy, and the storage investment cost of the CDN network construction is higher. 2.
  • Hierarchical CDN content networks are usually top-down, strict tree structures, and the parent nodes of child nodes are usually fixed.
  • the architectural limitations make it difficult to share content posted on the underlying nodes across the network, and the full use of top-down content publishing across the entire network affects the flexibility of the content introduced in the region. Summary of the invention
  • embodiments of the present invention provide a method, system, and device for providing content based on a peer-to-peer storage network.
  • the technical solution is as follows:
  • a method for providing content based on a peer-to-peer storage network comprising: distributing media content to a peer storage node according to a preset distribution policy, where the peer storage node constitutes a peer-to-peer storage network;
  • the edge play node obtains media content from the peer-to-peer storage network according to the identifier of the media content carried in the service request of the terminal user, where the service request carries the identifier of the media content;
  • the edge play node provides the acquired media content to the end user.
  • an edge play node comprising:
  • a receiving module configured to receive a service request sent by the terminal user, where the service request carries an identifier of the media content
  • An obtaining module configured to acquire media content from the peer storage node according to the service request received by the receiving module
  • a providing module configured to provide the media content acquired by the obtaining module to the terminal user.
  • a terminal device includes:
  • An obtaining module configured to obtain location information of a peer storage node where the media content is located
  • the sending module is configured to send a service request, where the service request carries the identifier of the media content that the user wants to obtain and the location information of the peer storage node where the media content acquired by the acquiring module is located.
  • a distribution device comprising:
  • a policy module configured to obtain a distribution policy
  • a distribution module configured to distribute the media content to a peer storage node in the peer-to-peer storage network according to the distribution policy acquired by the policy module.
  • a system for providing content based on a peer-to-peer storage network comprising: an edge play node and at least one peer storage node; the peer storage node forming a peer-to-peer storage network;
  • the edge playing node is configured to receive a service request sent by the terminal user, obtain the media content from the peer storage node according to the identifier of the media content carried in the service request, and then provide the obtained media content to the The terminal user;
  • the peer storage node is configured to obtain media content distributed according to a preset distribution policy; and provide the media content to the edge play node according to the request of the edge play node.
  • FIG. 1 is a schematic diagram of the operation of a CDN network provided by the prior art
  • FIG. 2 is a schematic diagram of a hierarchical CDN content network of a three-layer deployment provided by the prior art
  • FIG. 3 is a schematic diagram of a network architecture of an application peer-to-peer storage network according to an embodiment of the present invention
  • FIG. 4 is a peer-to-peer storage provided by an embodiment of the present invention. Schematic diagram of the physical logic structure under the network architecture;
  • FIG. 5 is a schematic flow chart of a method for providing content based on a peer-to-peer storage network according to Embodiment 1 of the present invention
  • FIG. 6 is a schematic diagram of information interaction provided by a peer-to-peer storage network according to Embodiment 1 of the present invention.
  • FIG. 8 is a schematic flow chart of a method for providing content based on a peer-to-peer storage network according to Embodiment 2 of the present invention.
  • FIG. 9 is a schematic diagram of information interaction provided by a peer-to-peer storage network according to Embodiment 2 of the present invention.
  • FIG. 10 is a schematic diagram of information interaction of a method for providing content based on a peer-to-peer storage network when the MSF fails according to Embodiment 2 of the present invention
  • FIG. 11 is a schematic diagram of an edge play node according to Embodiment 3 of the present invention.
  • FIG. 12 is another schematic diagram of an edge play node according to Embodiment 3 of the present invention.
  • FIG. 13 is a schematic diagram of a terminal device according to Embodiment 4 of the present invention.
  • Figure 14 is a schematic diagram of a distribution device according to Embodiment 5 of the present invention.
  • FIG. 15 is a schematic diagram of a system for providing content based on a peer-to-peer storage network according to Embodiment 6 of the present invention.
  • FIG. 16 is another schematic diagram of a system for providing content based on a peer-to-peer storage network according to Embodiment 6 of the present invention. detailed description
  • the technical solution provided by the embodiment of the present invention introduces a peer-to-peer storage network, and provides media content to the end user through the peer-to-peer storage network, thereby greatly reducing storage redundancy in the existing content network, and reducing network management and maintenance costs. Improve the reliability of the network.
  • FIG. 3 is a schematic diagram of a network architecture of an application peer-to-peer storage network according to an embodiment of the present invention, including a peer-to-peer storage network, an edge play node, and an end user, where:
  • peer-to-peer storage network used to provide media content to end users, each storage in the network
  • the storage nodes are all peer-to-peer content storage nodes (Media Storage Functions, MSF) that can provide media content storage services.
  • MSF Media Storage Functions
  • the media content on each storage node can serve the entire network.
  • the hierarchical organization management structure is cancelled, the intermediate level cache node is cancelled, and the core content layer introduces multiple peer storage nodes to provide media content storage services, and all media content is evenly distributed to multiple peer storage nodes. (Distribution policies can be based on the load of each peer node, etc.) to distribute content storage access capabilities.
  • the peer-to-peer storage network consists of all peer-to-peer storage nodes (MSFs) in the network.
  • the peer-to-peer storage network can also contain multiple sub-domains.
  • Each peer-to-peer storage node can belong to a specific sub-domain and can be independent of any sub-domain. , can also belong to multiple subdomains.
  • the so-called sub-domains can usually be divided into regions. For example, one province constitutes one sub-domain and multiple provinces form a large shared storage network. Each region in the province (one region contains multiple cities) constitutes one.
  • the subdomain and the entire province is a shared storage network.
  • the content in the peer-to-peer storage network may be content distribution within the entire network, or content distribution within the scope of the sub-domain, where:
  • the content distributed by the area can be locally shared only in the area (one or more sub-domains) to which the content belongs, or globally in several areas or the entire network.
  • the edge play node is a node that actually provides a media data stream for the user terminal.
  • the edge play node obtains media content from the peer-to-peer storage network and provides it to the final user terminal.
  • Edge play node as edge cache and coded streaming service for peer-to-peer storage network to user terminal Cry
  • FIG. 4 is a schematic diagram of an entity logical structure in a peer-to-peer storage network architecture according to an embodiment of the present invention.
  • the media service control unit is a control unit that is specifically responsible for providing an IPTV service, and is configured to receive a service request of the terminal user.
  • the edge play node is selected for the end user; the edge play node is an entity that provides media delivery play function closer to the physical location of the user, and the edge play node can set a cache for buffering high-frequency media content with high access frequency.
  • the peer-to-peer storage network is composed of a plurality of MSFs for providing storage of actual media content, wherein each media content is pre-distributed to each MSF when it is initially released.
  • the media content is distributed to the peer storage node, and the peer storage node constitutes a peer-to-peer storage network; then, the edge play node receives the request of the terminal user, and is carried according to the service request of the terminal user.
  • the identification of the media content the media content is obtained from the peer-to-peer storage network; finally, the edge play node provides the obtained media content to the end user.
  • FIG. 5 is a schematic flowchart of a method for providing content based on a peer-to-peer storage network according to Embodiment 1 of the present invention.
  • the structure shown in FIG. 4 is taken as an example for description.
  • the specific content is as follows: Step 101: Distribute media content to the user in advance Peer-to-peer storage node in the MSF in the storage node. Specifically include:
  • media can be distributed according to different content distribution policies, media can be The content is distributed to different ranges of content storage nodes MSF in the peer-to-peer network, and content distribution can be performed within the entire network, or content distribution within the area.
  • each peer storage node has a node identifier (Node-ID) (corresponding to this embodiment, respectively, Node-ID-MSF1, Node-ID-MSF2 Node-ID-MSFm
  • the media content has a resource identifier (corresponding to the Resource-ID in this embodiment), and the Resource-ID is mapped to the Node-ID-MSF1 and the Node-ID-MSF2, respectively, according to a preset mapping algorithm.
  • the content is distributed to the MSF1 and MSF2 nodes according to the mapping relationship.
  • Step 102 The user terminal sends a service request of the media content to the media service control unit SCF, where the service request includes an identifier of the media content to be requested.
  • Step 103 The media service control unit SCF sends the received service request to the edge play node.
  • the media service control unit SCF After receiving the service request sent by the terminal user, the media service control unit SCF selects an edge play node that is optimal (for example, closest to the physical location of the terminal user) from the plurality of edge play nodes according to the selection policy defined by the media service control unit.
  • the embodiment of the present invention does not limit the specific manner and method used by the media service control unit SCF when selecting an edge play node.
  • Step 104 After receiving the service request, the edge play node sends a content query request to the peer-to-peer storage network by using a peer-to-peer network algorithm according to the identifier of the media content in the request.
  • Step 105 The peer-to-peer storage network queries the content query request and the corresponding peer-to-peer network algorithm, and returns the query result to the edge play node, where the query result includes location information of the corresponding MSF that can provide the media content.
  • Step 106 After receiving the location information of the MSF returned by the peer-to-peer storage network, the edge play node requests the MSF to obtain the media content.
  • Step 107 The edge playing node obtains the media content, encodes the obtained media content, and finally provides the content to the terminal user.
  • the edge play node can select the appropriate MSF according to its own selection policy, for example:
  • the calculation method of the geographic location priority algorithm may be based on an IP address prefix (usually the device whose physical location is close, and the IP prefix thereof also matches), the geographical location information carried in the IP packet, and the active delay detection (according to The method of detecting the delay, the small delay correspondingly indicates the position is close).
  • the edge play node can be acquired from multiple MSFs (MSF1 and MSF2) with media content at the same time. This can provide content acquisition efficiency and shorten the content acquisition time without guaranteeing the reliability of the content.
  • the edge play node provided by the embodiment of the present invention further has a cache function. When the terminal user access frequency is high to a defined threshold, the edge play node caches the media content, thereby realizing the subsequent access to the media content. When the end user's service request is received, the cached media content can be directly extracted and sent to the user, thereby further improving the access efficiency and reducing the waste of the network bandwidth.
  • the media content is cached.
  • the embodiment of the present invention does not limit the purpose of the edge play node to cache the media content, and may formulate a cache policy according to the system requirements. Accordingly, the edge play node performs a corresponding cache action according to the established cache policy.
  • FIG. 6 is a schematic diagram of information interaction based on content provided by a peer-to-peer storage network according to Embodiment 1 of the present invention.
  • the edge play node receives the service request
  • the peer-to-peer storage network sends a content query request to the peer-to-peer storage network according to the identifier of the media content in the request.
  • the peer-to-peer storage network queries the content query request and the corresponding peer-to-peer network algorithm, and returns the query result to the edge play node, where the query result includes the content location information of the corresponding MSF.
  • the edge play node can policy select one MSF. As shown in FIG.
  • the edge play node when the edge play node receives the service request, it sends a content query request to the peer-to-peer storage network using the peer-to-peer network algorithm according to the identifier of the media content in the request.
  • the peer-to-peer storage network queries the content query request and the corresponding peer-to-peer network algorithm, and returns the query result to the edge play node, where the query result includes the content location information of the corresponding MSF.
  • the edge play node can policy select an MSF and select the initial selection The MSF obtains the media content.
  • the edge playing node may choose to have the media to other users.
  • the MSF of the content in the figure, MSF2 is taken as an example
  • the method for providing content based on a peer-to-peer storage network introduces a peer-to-peer storage network, and provides media content to an end user through a peer-to-peer storage network, thereby greatly reducing the existing content network.
  • Storage redundancy reduces network management and maintenance costs and improves network reliability.
  • FIG. 8 is a schematic flowchart of a method for providing content based on a peer-to-peer storage network according to Embodiment 2 of the present invention.
  • the structure diagram provided in FIG. 4 is still taken as an example.
  • the difference from Embodiment 1 is that when the media content is distributed to After the peer-to-peer storage node MSF in the peer-to-peer storage network, the location information of each media content is advertised to the terminal user through the added function entity (for example, the service discovery and selection information unit), and the specific content is as follows:
  • Step 201 The media content is distributed in advance to the peer storage node MSF in the peer-to-peer storage network.
  • Step 202 After the media content is distributed to the peer storage node MSF in the peer-to-peer storage network, the location information of the MSF where the media content is located is advertised to the service discovery and selection information unit.
  • the media content 1 is distributed to the MSF1 and the MSF2, and the resource identifier of the media content 1 and the address identifier of the MSF are sent to the service discovery and selection information unit.
  • Step 203 The service discovery and selection information unit forwards the location information of the MSF where the received media content is located to the terminal user.
  • the service discovery and selection information unit may provide the location information of the MSF where each media content is located to the terminal user through a menu. See Table 1 for a schematic table.
  • the service discovery and selection information unit in the embodiment of the present invention can be implemented by separately setting a server, and can be integrated into an existing server to obtain the medium in the peer-to-peer storage network.
  • the embodiment of the present invention does not limit the specific manner and method for the terminal user to obtain the location information corresponding to the media content, and may also be obtained by other forms, such as human acquisition.
  • Step 204 The terminal user sends a service request to the SCF, where the service request carries the identifier of the media content and the location information of the MSF where the media content is located.
  • Step 205 After receiving the service request, the SCF forwards the service request to the edge play node selected according to the preset rule.
  • Step 206 After receiving the service request, the edge play node requests the corresponding MSF node in the peer-to-peer storage network to obtain the media content according to the identifier of the media content carried in the service request and the location information of the MSF where the media content is located. Carry the logo of the media content.
  • Step 207 The corresponding MSF node in the peer-to-peer storage network receives the edge broadcast node, please send After the request, the edge play node is provided with corresponding media content according to the identifier of the media content carried in the request.
  • Step 208 After receiving the media content returned by the MSF, the edge play node is streamed and then provided to the terminal user.
  • the edge play node provided by the embodiment of the present invention further has a cache function.
  • the edge play node caches the media content, thereby realizing the subsequent access to the media content.
  • the cached media content can be directly extracted and sent to the user, thereby further improving the access efficiency and reducing the waste of the network bandwidth.
  • the media content is cached.
  • the embodiment of the present invention does not limit the purpose of the edge play node to cache the media content, and may formulate a cache policy according to the system requirements. Accordingly, the edge play node performs a corresponding cache action according to the established cache policy.
  • FIG. 9 is a schematic diagram of information exchange based on content provided by a peer-to-peer storage network according to Embodiment 2 of the present invention.
  • the edge play node After receiving the service request, the edge play node requests to obtain content from the peer-to-peer storage network according to the identifier of the media content in the request and the location information of the MSF where the media content is located.
  • the edge play node can policy to select an MSF.
  • FIG. 10 is a schematic diagram of information interaction of a method for providing content based on a peer-to-peer storage network when the MSF fails according to Embodiment 2 of the present invention.
  • the edge play node After receiving the service request, the edge play node requests to obtain content from the peer-to-peer storage network according to the identifier of the media content in the request and the location information of the MSF where the media content is located. When content is stored in multiple When the MSF node is used, the edge play node can select an MSF policy and request the media content from the initially selected MSF. If the initially selected MSF fails (in the figure, MSF1 is taken as an example), the edge play node can be requested according to the request. The identifier of the carried media content is selected to obtain the media content from other MSFs having the media content (in the figure, MSF2 is taken as an example).
  • the method for providing content based on a peer-to-peer storage network introduces a peer-to-peer storage network, and provides media content to an end user through a peer-to-peer storage network, thereby greatly reducing the existing content network. Storage redundancy, reducing network management and maintenance costs, and improving network reliability.
  • FIG. 11 is a schematic diagram of an edge play node according to Embodiment 3 of the present invention, which includes:
  • a receiving module configured to receive a service request sent by the terminal user, where the service request carries an identifier of the media content
  • An obtaining module configured to obtain media content from a peer storage node according to a service request received by the receiving module
  • Providing a module configured to provide the media content acquired by the obtaining module to the end user.
  • the obtaining module When the service request carries the identifier of the media content that the terminal user wants to obtain, the obtaining module according to the identifier of the media content that the terminal user wants to obtain in the service request received by the receiving module, and the preset peer-to-peer network algorithm Obtaining information of the target peer storage node, and obtaining media content from the at least one target peer storage node.
  • the obtaining module specifically includes:
  • An obtaining unit configured to be used by an end user carried in a service request received by the receiving module Obtaining the identifier of the media content and the preset peer-to-peer network algorithm to obtain information of the target peer storage node;
  • the first selecting unit is configured to select, according to the geographic location priority algorithm and the information of the target peer storage node acquired by the acquiring unit, a target peer storage node, obtaining media content from the selected at least one target peer storage node;
  • a second selecting unit configured to select a target peer storage node according to the processing capability prioritization algorithm and the information of the target peer storage node acquired by the acquiring unit, and obtain the media content from the selected at least one target peer storage node.
  • the obtaining module is specifically configured to obtain the media content from the peer storage node corresponding to the at least one location information according to the service request received by the receiving module.
  • FIG. 12 is another schematic diagram of an edge play node according to Embodiment 3 of the present invention.
  • the method further includes a cache module, where the cache module is used to cache the media content acquired by the module.
  • the cache module specifically includes:
  • the determining unit is configured to determine whether the frequency of the media content is obtained reaches a preset threshold; and the buffer unit is configured to cache the media content when the result of the determining by the determining unit is yes.
  • the cached media content can be directly extracted and sent to the user, thereby further improving the access efficiency and reducing the network. Waste of bandwidth.
  • the media content when the cache module in the edge play node is specifically implemented, the media content may also be according to the identifier in the media content or according to the key segment in the media content. Cache.
  • the embodiment of the present invention does not limit the purpose of caching media content, and may formulate a caching policy according to system requirements. Accordingly, the caching module performs a corresponding caching action according to the formulated caching policy.
  • the edge play node obtained by the embodiment of the present invention obtains the media content in the peer-to-peer storage network by using the edge play node, and then provides the media content to the terminal user, thereby greatly reducing the existing content.
  • Storage redundancy in the network reduces the management and maintenance costs of the network and improves the reliability of the network.
  • FIG. 13 is a schematic diagram of a terminal device according to Embodiment 4 of the present invention.
  • the terminal device includes:
  • An obtaining module configured to obtain location information of a peer storage node where the media content is located
  • the sending module is configured to send a service request, where the service request carries the identifier of the media content that the user wants to obtain and the location information of the peer storage node where the media content acquired by the acquiring module is located.
  • the terminal device provided by the embodiment of the present invention obtains the identifier of the media content to be acquired and the location information of the peer storage node where the media content is located in the service request of the user, so that the edge play node obtains the location information according to the service request.
  • the media content stored by the peer storage node corresponding to the location information improves the speed of obtaining the media content from the peer-to-peer storage network, and improves the acquisition efficiency of acquiring the media content.
  • FIG. 14 is a schematic diagram of a distribution device according to Embodiment 5 of the present invention.
  • the distribution device includes:
  • a policy module configured to obtain a distribution policy
  • a distribution module configured to distribute media content to peers according to a distribution policy obtained by the policy module A peer storage node in the storage network.
  • the above policy module includes:
  • the distribution module includes :
  • the first distribution unit is configured to distribute the media content to the peer storage node in the peer-to-peer storage network according to the first distribution policy acquired by the first policy unit.
  • the above policy module includes:
  • a second policy unit configured to obtain a second distribution policy, where the second distribution policy is to distribute the media content to the target peer storage node according to a preset peer-to-peer network algorithm
  • the distribution module includes:
  • a second distribution unit configured to acquire the target peer storage node, and distribute the media content to the target peer storage node according to the second distribution policy acquired by the second policy unit.
  • the second distribution unit specifically includes:
  • Obtaining a sub-unit configured to obtain an identifier of the media content to be distributed, and obtain an identifier of the target peer storage node according to a preset peer-to-peer network algorithm
  • mapping subunit configured to map an identifier of the media content acquired by the obtaining subunit to an identifier of the at least one target peer storage node
  • the distribution subunit is configured to distribute the media content to the target peer storage node according to the mapping relationship obtained after mapping the mapping unit.
  • the peer-to-peer storage network may The specific network configuration system needs to implement the distribution of the media content, for example, distributing the media content to different ranges of the peer storage nodes MSF in the peer-to-peer network, and distributing the content in the whole network or in the area-wide content. distribution.
  • each peer storage node has a node identifier (Node-ID) (corresponding to this embodiment, respectively, Node-ID-MSF1, Node-ID-MSF2 Node-ID-MSFm
  • the media content has a resource identifier (corresponding to the Resource-ID in this embodiment), and the Resource-ID is mapped to the Node-ID-MSF1 and the Node-ID-MSF2, respectively, according to a preset mapping algorithm.
  • the content is distributed to the MSF1 and MSF2 nodes according to the mapping relationship.
  • the distribution device provided by the embodiment of the present invention successfully implements the purpose of distributing media content to the peer-to-peer storage network through the distribution device, and implements distribution of the media content according to the configuration requirement of the system, thereby improving the efficiency of distribution and effectively avoiding the distribution process. Problems such as redundancy.
  • the edge play node can also obtain the media content in the peer-to-peer storage network and then provide the media content to the end user, thereby greatly reducing storage redundancy in the existing content network and reducing network management. And the purpose of maintaining costs and improving the reliability of the network.
  • FIG. 15 is a schematic diagram of a system for providing content based on a peer-to-peer storage network according to Embodiment 6 of the present invention, where the system includes: an edge play node and at least one peer storage node; The peer storage node constitutes a peer-to-peer storage network;
  • the edge play node is configured to receive the service request sent by the terminal user, and obtain the media content from the peer storage node according to the identifier of the media content carried in the service request, and then provide the obtained media content to the terminal user;
  • the peer storage node is configured to store the media content distributed according to the preset distribution policy; and provide the media content to the edge play node according to the request of the edge play node.
  • the foregoing edge play node specifically includes:
  • a receiving module configured to receive a service request sent by an end user
  • An obtaining module configured to obtain media content from a peer storage node according to the identifier of the media content carried in the service request received by the receiving module;
  • Providing a module configured to provide the media content acquired by the obtaining module to the end user.
  • the acquiring module of the edge playing node is specifically used to identify the identifier of the media content that the terminal user wants to obtain according to the service request received by the receiving module.
  • the preset peer-to-peer network algorithm obtains the target peer storage node, and obtains the media content from the at least one target peer storage node.
  • the obtaining module specifically includes:
  • An obtaining unit configured to obtain a target peer storage node according to an identifier of the media content to be obtained by the terminal user and a preset peer-to-peer network algorithm carried in the service request received by the receiving module;
  • a first selecting unit configured to select, according to the geographic location prioritization algorithm, the target peer storage node acquired by the acquiring unit, and obtain the media content from the selected at least one target peer storage node;
  • a second selecting unit configured to select, according to the processing capability prioritization algorithm, the target peer storage node acquired by the acquiring unit, and obtain the media content from the selected at least one target peer storage node.
  • the edge play node in the system provided by the embodiment of the present invention further includes a cache module, where the cache module is configured to cache the obtained media content, where the cache module specifically includes:
  • the determining unit is configured to determine whether the frequency of the media content is obtained reaches a preset threshold; and the buffer unit is configured to cache the media content when the result of the determining by the determining unit is yes.
  • the cached media content can be directly extracted and sent to the user, thereby further improving the access efficiency and reducing the network. Waste of bandwidth.
  • the media content when the cache module is specifically implemented, the media content may be cached according to the identifier in the media content or according to the key segment in the media content.
  • the embodiment of the present invention does not limit the purpose of caching media content, and may formulate a caching policy according to system requirements.
  • the caching module performs a corresponding caching action according to the formulated caching policy.
  • FIG. 16 is another schematic diagram of a system for providing content based on a peer-to-peer storage network according to Embodiment 6 of the present invention. Further, in order to implement storage of media content of a peer storage node in a peer-to-peer storage network, the system The device further includes a distribution device, and the distribution device specifically includes:
  • a policy module configured to obtain a distribution policy
  • a distribution module configured to distribute the media content to a peer storage node in the peer storage network according to the distribution policy acquired by the policy module.
  • the above policy module includes: a first policy unit, configured to acquire a first distribution policy, where the first distribution policy is to uniformly distribute the media content according to a load of the peer node in the distribution scope;
  • the distribution module includes:
  • the first distribution unit is configured to distribute the media content to the peer storage node in the peer-to-peer storage network according to the first distribution policy acquired by the first policy unit.
  • the above policy module includes:
  • a second policy unit configured to obtain a second distribution policy, where the second distribution policy is to distribute the media content to the target peer storage node according to a preset peer-to-peer network algorithm
  • the distribution module includes:
  • a second distribution unit configured to acquire the target peer storage node, and distribute the media content to the target peer storage node according to the second distribution policy acquired by the second policy unit.
  • the second distribution unit specifically includes:
  • Obtaining a sub-unit configured to obtain an identifier of the media content to be distributed, and obtain an identifier of the target peer storage node according to a preset peer-to-peer network algorithm
  • mapping subunit configured to map an identifier of the media content acquired by the obtaining subunit to an identifier of the at least one target peer storage node
  • the distribution subunit is configured to distribute the media content to the target peer storage node according to the mapping relationship obtained after mapping the mapping unit.
  • the system for providing content based on the peer-to-peer storage network introduces a peer-to-peer storage network, and provides media content to the end user through the peer-to-peer storage network, thereby greatly reducing the existing content network. Storage redundancy, reducing network management and maintenance costs, and improving network reliability.
  • the embodiment of the invention provides a peer-to-peer storage network storage node for storing media content distributed according to a preset distribution policy; and providing media content to the edge playing node according to the request of the edge playing node.
  • the technical solution provided by the embodiment of the present invention introduces a peer-to-peer storage network, and provides media content to an end user through a peer-to-peer storage network, thereby eliminating storage redundancy, improving storage resource utilization efficiency, and avoiding The number of copies of a large number of intermediate-level cache nodes in a large-scale hierarchical CDN.
  • the peer-to-peer storage network there are only 2 to 3 copies of the same media content (more than 1 copy is for reliability), which effectively solves the large number of intermediate layers in the large-scale hierarchical CDN.
  • the problem of the number of copies also makes management and maintenance simple.
  • the edge play node does not need to be pre-distributed. After obtaining the media content from the storage network for the first time, if the user access frequency is high to the defined threshold, the media content is cached on the edge play node, a suitable cache. Management can implement this function. Further, the reliability of the network is improved. The single point of failure of the storage network does not affect the service.
  • Each storage node can serve the entire network, flexibly support regional content release management and promote content sharing.
  • All or part of the steps in the embodiments of the present invention may be implemented by software, and the corresponding software program may be stored in a readable storage medium such as an optical disk or a hard disk.

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Description

一种基于对等存储网络提供内容的方法、 系统和设备 技术领域
本发明涉及通信领域,特别涉及一种基于对等存储网络提供内容的方法、 系统和设备。 背景技术
流媒体业务或网络电视(IP Television, 以下简称: IPTV )业务是近几 年迅速发展的一种新业务, 其中, 流媒体业务利用流式传输技术, 在包交换 网络上传输多媒体文件, 包括视频、 音频等文件内容。 用户在访问这些内容 时无需完全下载就可以立即播放。流媒体实现的关键技术就是流式传输技术, 而流式传输技术是把连续的视频和音频信息经过处理后放上服务器, 让用户 一边下载一边观看、 收听, 而不需要等整个文件下载到自己机器后就可以观 看的网络传输技术。
随着 IPTV或流媒体业务在近年逐渐成为热点应用, 内容交付 /分发网络 ( Content Delivery/Distribution Network , 以下简称: CDN )被用来就近向用 户提供媒体或内容, 以提升用户体验, 其中, CDN是随着 web规模逐步扩大 而出现的, 适当的 CDN部署可以使靠近用户的 CDN节点緩存热点网页、 图 像等。 当用户请求内容时, 可以就近由这些 CDN緩存节点获取; 这样就使得 内容可以快速交付给用户, 从而改善用户体验; 同时可以减轻骨干网络的拥 塞状况。 参见图 1 , 图 1是现有技术提供的 CDN网络的工作示意图, CDN 一般由中心服务器( Center Server, 以下简称: CS )和多个边缘服务器( Edge Server, 以下简称: ES )组成内容网络, 用于向终端用户交付内容; 网络内 容提供服务器( Internet Content Provider Server, 以下简称: ICP Server )用于 接收终端用户的业务请求, 返回相应内容的统一资源定位符(Uniform Resource Locator,以下简称: URL);请求路由服务器( Request Routing Server, 以下简称: RRS )用于根据用户的内容 URL请求, 根据 ES负载、 相对位置 等选取较优的 ES为用户提供内容。
由于目前实现 CDN内容网络时, 釆用的是层次化的部署, 参见图 2, 图 2 是现有技术提供的三层部署的层次化 CDN 内容网络示意图, 由一级 CS ( High-CS , 以下简称 H-CS ) 、 二级 CS ( Low-CS , 以下简称 L-CS )和边 缘 ES组成。 当用户终端向 RRS发出内容请求后, RRS根据 ES上的内容、 ES负载、 ES物理位置为用户终端分配一个 ES, 如果由于 ES故障等原因导 致该 ES上无法向终端用户提供其所请求的内容, RRS将请求重定向到该用 户终端所属的 L-CS, 如果 L-CS上没有用户终端所请求的内容时, 再将请求 重定向到该用户终端所属的 H-CS。
发明人在实现本发明时发现, 现有的 CND 网络存在至少以下缺点和不 足:
1. 存储冗余: L-CS上存储的内容主要由 H-CS统一发布, 根据就近提供 的原则, 需要从 H-CS上复制内容到靠近用户的 L-CS节点, L-CS因此具备了 大量 H-CS上内容的副本, 且层次化 CDN中 L-CS与 L-CS之间的内容无法 共享, 这样就造成了中间緩存节点 L-CS上的大量存储冗余。 从层次化 CDN 网络的网络结构可以看出 CDN 中网络层次越多、 规模越大时, 冗余越大, CDN网络建设的存储投资成本较高。 2、 管理维护复杂: 为了保证可靠性, 避免单点失效带来的影响, 需要对 节点进行双机备份配置和管理, 而且新节点的加入也增加了网络管理的复杂 性; 同时需要对内容分发进行管理和维护, 需要预先将内容分发到靠用户近 的緩存节点。
3、 内容共享上的问题: 层次化 CDN内容网络通常是自上而下、 严格的 树状结构, 子节点的上级父节点通常是固定的。 架构上的限制使得底层节点 上发布的内容难以全网共享, 而如果完全釆用自上而下进行全网内容发布则 影响区域引进内容的灵活性。 发明内容
为了减少现有的内容网络中的存储冗余, 降低网络的管理和维护成本、 提高网络的可靠性, 本发明实施例提供了一种基于对等存储网络提供内容的 方法、 系统和设备。 所述技术方案如下:
一方面, 提供了一种基于对等存储网络提供内容的方法, 方法包括: 根据预设的分发策略, 将媒体内容分发到对等存储节点中, 所述对等存 储节点构成对等存储网络;
边缘播放节点根据终端用户的业务请求中携带的媒体内容的标识, 向所 述对等存储网络获取媒体内容, 所述业务请求中携带媒体内容的标识;
所述边缘播放节点将获取的媒体内容提供给所述终端用户。
一方面, 提供了一种边缘播放节点, 所述节点包括:
接收模块, 用于接收终端用户发送的业务请求, 所述业务请求中携带媒 体内容的标识; 获取模块, 用于根据所述接收模块接收到的业务请求, 从所述对等存储 节点获取媒体内容;
提供模块, 用于将所述获取模块获取的媒体内容提供给所述终端用户。 一方面, 提供了一种终端设备, 所述终端设备包括:
获取模块 , 用于获取媒体内容所在对等存储节点的位置信息;
发送模块, 用于发送业务请求, 所述业务请求中携带用户欲获取的媒体 内容的标识和所述获取模块获取的媒体内容所在对等存储节点的位置信息。
另一方面, 提供了一种分发设备, 所述分发设备包括:
策略模块, 用于获取分发策略;
分发模块, 用于根据所述策略模块获取的分发策略, 将媒体内容分发到 对等存储网络中的对等存储节点。
再一方面, 提供了一种基于对等存储网络提供内容的系统, 系统包括: 边缘播放节点和至少一个对等存储节点; 所述对等存储节点构成对等存储网 络;
所述边缘播放节点, 用于接收终端用户发送的业务请求, 根据所述业务 请求中携带的媒体内容的标识, 向所述对等存储节点获取媒体内容后, 将所 述获取的媒体内容提供给所述终端用户;
所述对等存储节点, 用于获取根据预设的分发策略分发的媒体内容; 并 根据所述边缘播放节点的请求, 向所述边缘播放节点提供所述媒体内容。
本发明实施例提供的技术方案的有益效果是:
? )入对等存储网络, 通过对等存储网络中的至少一个对等存储节点实现 向终端用户提供媒体内容, 从而大大减少现有的内容网络中的存储冗余, 降 低网络的管理和维护成本、 提高网络的可靠性的目的。 附图说明
图 1是现有技术提供的 CDN网络的工作示意图;
图 2是现有技术提供的三层部署的层次化 CDN内容网络示意图; 图 3是本发明实施例提供的应用对等存储网络的网络架构示意图; 图 4 是本发明实施例提供的对等存储网络架构下的实体逻辑结构示意 图;
图 5是本发明实施例 1提供基于对等存储网络提供内容的方法流程示意 图;
图 6是本发明实施例 1提供的基于对等存储网络提供内容的信息交互示 意图; 示意图;
图 8是本发明实施例 2提供基于对等存储网络提供内容的方法流程示意 图;
图 9是本发明实施例 2提供的基于对等存储网络提供内容的信息交互示 意图;
图 10是本发明实施例 2提供的当 MSF失效时基于对等存储网络提供内 容的方法的信息交互示意图;
图 11是本发明实施例 3提供的边缘播放节点的示意图;
图 12是本发明实施例 3提供的边缘播放节点的另一示意图; 图 13是本发明实施例 4提供的终端设备的示意图;
图 14是本发明实施例 5提供的分发设备的示意图;
图 15是本发明实施例 6提供的基于对等存储网络提供内容的系统示意 图;
图 16是本发明实施例 6提供的基于对等存储网络提供内容的系统的另一 示意图。 具体实施方式
为使本发明的目的、 技术方案和优点更加清楚, 下面将结合附图对本发 明实施方式作进一步地详细描述。
随着网络技术的发展, 部署传输网络的成本大幅下降, 省级到市级、 市 级到市级之间的光纤直连链路成为可能, 各网络节点之间釆用线速交换, 传 输速度大幅提高, 地理跨度上的延时甚至可以忽略不计。 相反的, 由于存储 设备的价格一直居高不下, 管理维护等费用不菲, 且随着 IPTV 以及流媒体 业务部署规模不断扩大, 海量内容的增长也造成运营商在存储设备上的投资 大幅增力口。
本发明实施例提供的技术方案, 引入对等存储网络, 通过对等存储网络 向终端用户提供媒体内容, 从而实现了大大减少现有的内容网络中的存储冗 余, 降低网络的管理和维护成本、 提高网络的可靠性。
参见图 3 , 图 3是本发明实施例提供的应用对等存储网络的网络架构示 意图, 包括对等存储网络、 边缘播放节点以及终端用户, 其中:
一、 对等存储网络: 用于向终端用户提供媒体内容, 网络中的每一个存 储节点都是能够提供媒体内容存储服务的对等内容存储节点 (Media Storage Function, 以下简称: MSF ) , 每一存储节点上的媒体内容都可以为全网用户 服务。 在对等存储网络中取消层次化的组织管理结构、 取消中间层次的緩存 节点, 核心内容层面引入多个对等存储节点提供媒体内容存储服务, 把所有 媒体内容均衡分布到多个对等存储节点 (可以根据每个对等节点的负载等分 发策略) , 从而分布化内容存储访问能力。 对等存储网络由网络范围内所有 的对等存储节点 (MSF )组成, 对等存储网络还可以包含多个子域, 每个对 等存储节点可以属于一个特定的子域, 可以独立于任何子域, 也可以属于多 个子域。 所谓子域通常可以按地域性进行划分, 例如一个省构成一个子域而 多个省之间组成一个大的共享存储网络, 也可以省内的每个地区 (一个地区 包含多个市)构成一个子域而整个省为一个共享存储网络。
当实现对等存储网络中内容的分发时, 可以是全网范围内的内容分发, 也可以是子域范围内的内容分发, 其中:
对于全网范围内的内容分发, 内容在全网范围内实现全局共享, 在同一 层面统一进行分发调度。
对于子域范围内的内容分发, 在该子域内统一进行分发调度而不会扩散 到不属于该区域的对等存储节点。 根据内容共享策略, 区域分发的内容可以 仅在该内容所属的区域(一个或者多个子域) 内实现局部共享, 也可以在几 个区域或全网范围内实现全局共享。
二、 边缘播放节点: 边缘播放节点是实际为用户终端提供媒体数据流的 节点。 边缘播放节点从对等存储网络获取媒体内容, 并提供给最终的用户终 端。 边缘播放节点作为对等存储网络到用户终端的边缘緩存和编码流化服务 哭
参见图 4, 图 4是本发明实施例提供的对等存储网络架构下的实体逻辑 结构示意图, 其中, 媒体业务控制单元为具体负责提供 IPTV 业务的控制单 元, 用于接收终端用户的业务请求, 为终端用户选择边缘播放节点; 边缘播 放节点是离用户物理位置较近的提供媒体交付播放功能的实体, 边缘播放节 点可以设置緩存, 用于緩存访问频度高的高热度的媒体内容。 对等存储网络 由多个 MSF构成, 用于提供实际媒体内容的存储, 其中, 各媒体内容初始发 布时已经预先分发到各 MSF中。
其中, 应用上述对等存储网络架构, 本发明实施例提供的基于对等存储 网络提供内容的方法内容如下:
首先, 根据预设的分发策略, 将媒体内容分发到对等存储节点中, 对等 存储节点构成对等存储网络; 然后, 边缘播放节点接收终端用户的请求, 根 据终端用户的业务请求中携带的媒体内容的标识, 向对等存储网络获取媒体 内容; 最后, 边缘播放节点将获取的媒体内容提供给终端用户。
下面, 将以多个实施例对本发明实施例提供的基于对等存储网络提供内 容的方法进行详细的说明, 详见下述各实施例。
实施例 1
参见图 5, 图 5是本发明实施例 1提供基于对等存储网络提供内容的方 法流程示意图, 以图 4提供的结构示意图为例进行说明, 具体内容如下: 步骤 101 : 预先将媒体内容分发到对等存储网络内的对等存储节点 MSF 中。 具体包括:
由于可以根据不同内容分发范围策略实现媒体内容的分发, 可以把媒体 内容分发到对等网络中不同范围的内容存储节点 MSF上,可以在全网范围内 进行内容分发, 也可以为区域范围内的内容分发。
a )可以根据对等存储网络中各对等存储节点的负载, 将媒体内容均匀分 发到各 MSF;
b )也可以根据特定对等网络算法, 例如对等节点 (Peer to Peer, 以下简 称: P2P ) /分散式哈希表技术算法( Distributed Hash Table , 以下简称: DHT ) 进行分布化计算, 根据计算结果选择分发的目标 MSF, 实现媒体内容的均衡 分发。 具体为: 每个对等存储节点具有节点标识(Node-ID ) (对应本实施例, 分别为 Node-ID-MSFl、 Node-ID-MSF2 Node-ID-MSFm
Node-ID-MSFn ) , 媒体内容具有资源标识(对应本实施例为 Resource-ID ) , 根据预设的映射算法, 将 Resource-ID 分别映射到 Node-ID-MSFl 和 Node-ID-MSF2, 媒体内容根据映射关系分发存储到 MSF1和 MSF2节点。
步骤 102: 用户终端 UE向媒体业务控制单元 SCF发送媒体内容的业务 请求, 其中, 该业务请求中包含所要请求的媒体内容的标识;
步骤 103: 媒体业务控制单元 SCF将接收到的业务请求发送给边缘播放 节点。
其中, 媒体业务控制单元 SCF收到终端用户发送的业务请求后, 根据自 身制定的选择策略, 从多个边缘播放节点中, 选择出一个最优(例如离终端 用户物理位置最近) 的边缘播放节点, 本发明实施例不限制媒体业务控制单 元 SCF在选择边缘播放节点时所釆用的具体方式和方法。
步骤 104: 边缘播放节点收到业务请求后, 根据请求中的媒体内容的标 识使用对等网络算法向对等存储网络发送内容查询请求。 步骤 105: 对等存储网络根据内容查询请求和相应的对等网络算法进行 查询, 并将查询结果返回给该边缘播放节点, 查询结果中包含能够提供该媒 体内容的相应 MSF的位置信息。
步骤 106: 边缘播放节点收到对等存储网络返回的 MSF的位置信息后, 向该 MSF请求获取媒体内容;
步骤 107: 边缘播放节点获取到媒体内容, 对获取到的媒体内容进行编 码流化并最终提供给终端用户。
进一步地, 当在步骤 105中, 查询结果中包含了多个能够提供该媒体内 容的相应 MSF的位置信息时, 例如, 包含了两个 MSF ( MSF1和 MSF2, 由 于在步骤 101 中对媒体内容进行分发时, MSF1和 MSF2都得到了同一个媒 体内容数据) , 相应地, 边缘播放节点在收到对等存储网络返回的查询结果 后, 可以根据自身制定的选择策略选择出合适的 MSF, 例如:
a )使用地理位置优先算法, 判断 MSF与边缘播放节点的靠近程度。 具 体的, 地理位置优先算法的计算依据可以通过 IP地址前缀(通常物理位置接 近的设备, 其 IP的前缀也会匹配) 、 通过 IP报文中携带的地理位置信息、 通过主动延时探测(根据探测的时延, 时延小相应地表示位置接近)等方法。
b )使用处理能力优先算法, 判断相对于需要提供的媒体内容, 其提供能 力最优的 MSF (例如根据 MSF1和 MSF2,此时的负载情况进行选择, 如 CPU 的占用、 内存的占用等) 。
进一步地, 边缘播放节点可以同时从多个具有媒体内容的 MSF ( MSF1 和 MSF2 )获取。 这样可以在保证可靠性的前提下提供内容获取效率, 缩短 内容的获取时间, 不会因为某个 MSF节点故障而导致内容获取时间变长。 本发明实施例提供的边缘播放节点还具有緩存功能, 当终端用户访问频 度高到定义的阀值时, 边缘播放节点将对该媒体内容进行緩存, 从而实现了 当收到后续访问该媒体内容的终端用户的业务请求时, 便可以直接提取緩存 的该媒体内容发送给用户, 从而进一步地, 提高了访问效率、 减少了网络带 宽的浪费。
进一步地,本发明实施例提供的边缘播放节点的緩存功能在具体实现时, 媒体内容进行緩存。本发明实施例不限制边缘播放节点緩存媒体内容的目的, 可以根据系统需要制定緩存策略, 相应地, 边缘播放节点根据制定的緩存策 略执行相应的緩存动作。
参见图 6, 图 6是本发明实施例 1提供的基于对等存储网络提供内容的 信息交互示意图。 特别地, 当边缘播放节点收到业务请求后, 根据请求中的 媒体内容的标识使用对等网络算法向对等存储网络发送内容查询请求。 对等 存储网络根据内容查询请求和相应的对等网络算法进行查询, 并将查询结果 返回给边缘播放节点, 查询结果中包含相应 MSF的内容位置信息。 当内容存 储在多个 MSF节点时, 边缘播放节点可以策略选择一个 MSF。 示意图, 如图 7所示, 当边缘播放节点收到业务请求后, 根据请求中的媒体 内容的标识使用对等网络算法向对等存储网络发送内容查询请求。 对等存储 网络根据内容查询请求和相应的对等网络算法进行查询, 并将查询结果返回 给边缘播放节点, 查询结果中包含相应 MSF的内容位置信息。 当内容存储在 多个 MSF节点时, 边缘播放节点可以策略选择一个 MSF, 并向该初始选择 的 MSF获取媒体内容, 如果该初始选择的 MSF发生了失效(图中以 MSF1 为例, 如由于 MSF1设备自身故障等原因导致无法提供媒体内容服务等) , 边缘播放节点可以选择向其它具有该媒体内容的 MSF (图中以 MSF2为例) 请求获取媒体内容,
综上所述, 本发明实施例提供的基于对等存储网络提供内容的方法, 引 入对等存储网络, 通过对等存储网络向终端用户提供媒体内容, 从而实现了 大大减少现有的内容网络中的存储冗余, 降低网络的管理和维护成本, 提高 网络的可靠性。
实施例 2
参见图 8, 图 8是本发明实施例 2提供基于对等存储网络提供内容的方 法流程示意图, 仍以图 4提供的结构示意图为例进行说明, 与实施例 1的区 别在于当媒体内容分发到对等存储网络内的对等存储节点 MSF后,通过增加 的功能实体(例如, 业务发现与选择信息单元) , 将各媒体内容的位置信息 通告给终端用户, 具体内容如下:
步骤 201 : 预先将媒体内容分发到对等存储网络内的对等存储节点 MSF 中。
步骤 202: 预先将媒体内容分发到对等存储网络内的对等存储节点 MSF 后, 将各媒体内容所在 MSF的位置信息通告给业务发现与选择信息单元。
例如, 媒体内容 1被分发到 MSF1和 MSF2中, 相应地, 将媒体内容 1 的资源标识和 MSF的地址标识, 下发给业务发现与选择信息单元。
步骤 203: 业务发现与选择信息单元将收到的媒体内容所在 MSF的位置 信息, 转发给终端用户。 其中, 该步骤在具体实现时, 具体可以为业务发现与选择信息单元通过 菜单的形式, 向终端用户提供各媒体内容所在 MSF的位置信息。 参见表 1 , 提供了一种示意表。
表 1
Figure imgf000015_0001
其中, 本发明实施例中的业务发现与选择信息单元, 作为一个功能性实 体, 可以通过单独设置服务器实现该功能, 可以集成在现有的某台服务器中 实现其获取对等存储网络中的媒体内容的标识以及媒体内容所在 MSF 的位 置 (标识)信息的功能以及向终端用户进行媒体内容的标识以及媒体内容所 在 MSF的位置信息提供的功能。本发明实施例不限制终端用户获取媒体内容 对应的位置信息的具体方式和方法, 还可以为通过其它的形式进行获取, 如 人为获取。
步骤 204: 终端用户向 SCF发送业务请求, 其中, 该业务请求中携带媒 体内容的标识和媒体内容所在 MSF的位置信息。
步骤 205: SCF接收到业务请求后, 将该业务请求转发给根据预设规则 选择出的边缘播放节点。
步骤 206: 边缘播放节点收到业务请求后, 根据该业务请求中携带的媒 体内容的标识和媒体内容所在 MSF 的位置信息, 向对等存储网络中相应的 MSF节点请求获取媒体内容, 该请求中携带媒体内容的标识。
步骤 207: 对等存储网络中相应的 MSF节点收到边缘播放节点发送的请 求后, 根据该请求中携带的媒体内容的标识, 向边缘播放节点提供相应的媒 体内容。
步骤 208: 边缘播放节点接收 MSF返回的媒体内容后, 对该媒体内容编 码流化后, 提供给终端用户。
本发明实施例提供的边缘播放节点还具有緩存功能, 当终端用户访问频 度高到定义的阀值时, 边缘播放节点将对该媒体内容进行緩存, 从而实现了 当收到后续访问该媒体内容的终端用户的业务请求时, 便可以直接提取緩存 的该媒体内容发送给用户, 从而进一步地, 提高了访问效率、 减少了网络带 宽的浪费。
进一步地,本发明实施例提供的边缘播放节点的緩存功能在具体实现时, 媒体内容进行緩存。本发明实施例不限制边缘播放节点緩存媒体内容的目的, 可以根据系统需要制定緩存策略, 相应地, 边缘播放节点根据制定的緩存策 略执行相应的緩存动作。
参见图 9, 图 9是本发明实施例 2提供的基于对等存储网络提供内容的 信息交互示意图。 当边缘播放节点收到业务请求后, 根据请求中的媒体内容 的标识和媒体内容所在 MSF的位置信息请求从对等存储网络获取内容。 当内 容存储在多个 MSF节点时, 边缘播放节点可以策略选择一个 MSF。
参见图 10, 图 10是本发明实施例 2提供的当 MSF失效时基于对等存储 网络提供内容的方法的信息交互示意图。
当边缘播放节点收到业务请求后, 根据请求中的媒体内容的标识和媒体 内容所在 MSF的位置信息请求从对等存储网络获取内容。 当内容存储在多个 MSF节点时,边缘播放节点可以策略选择一个 MSF,并向该初始选定的 MSF 请求获取媒体内容, 如果初始选定的 MSF失效后(图中以 MSF1为例 ) , 边 缘播放节点可以根据请求中携带的媒体内容的标识, 选择从其它具有该媒体 内容的 MSF (图中以 MSF2为例 )获取媒体内容。
综上所述, 本发明实施例提供的基于对等存储网络提供内容的方法, 引 入对等存储网络, 通过对等存储网络向终端用户提供媒体内容, 从而实现了 大大减少现有的内容网络中的存储冗余, 降低网络的管理和维护成本、 提高 网络的可靠性的目的。
实施例 3
参见图 11 , 图 11是本发明实施例 3提供的边缘播放节点的示意图, 包 括:
接收模块, 用于接收终端用户发送的业务请求, 所述业务请求中携带媒 体内容的标识;
获取模块, 用于根据接收模块接收到的业务请求, 从对等存储节点获取 媒体内容;
提供模块, 用于将获取模块获取的媒体内容提供给终端用户。
(一) 、 当业务请求中携带终端用户欲获取的媒体内容的标识时, 获取模块根据接收模块接收到的业务请求中携带的终端用户欲获取的媒 体内容的标识和预设的对等网络算法, 获取目标对等存储节点的信息, 从至 少一个目标对等存储节点获取媒体内容。
该获取模块具体包括:
获取单元, 用于根据接收模块接收到的业务请求中携带的终端用户欲获 取的媒体内容的标识和预设的对等网络算法,获取目标对等存储节点的信息; 第一选择单元, 用于根据地理位置优先算法和获取单元获取的目标对等 存储节点的信息, 选择目标对等存储节点, 从选择出的至少一个目标对等存 储节点获取媒体内容;
第二选择单元, 用于根据处理能力优先算法和获取单元获取的目标对等 存储节点的信息, 选择目标对等存储节点, 从选择出的至少一个目标对等存 储节点获取媒体内容。
(二) 、 当业务请求中既携带有终端用户欲获取的媒体内容的标识, 又 携带媒体内容所在对等存储节点的位置信息时,
获取模块具体用于根据接收模块接收的业务请求, 从至少一个位置信息 对应的对等存储节点获取媒体内容。
进一步地, 参见图 12, 图 12是本发明实施例 3提供的边缘播放节点的 另一示意图, 其还包括緩存模块, 緩存模块用于緩存获取模块获取的媒体内 容。
该緩存模块具体包括:
判断单元, 用于判断媒体内容被获取的频率是否达到预设阀值; 緩存单元, 用于当判断单元判断的结果为是, 则緩存媒体内容。
通过增加该緩存模块, 从而实现了当收到后续访问该媒体内容的终端用 户的业务请求时, 便可以直接提取緩存的该媒体内容发送给用户, 从而进一 步地, 提高了访问效率、 减少了网络带宽的浪费。
本发明实施例提供边缘播放节点中的緩存模块在具体实现时, 还可以根 据媒体内容中的标识或者根据媒体内容中的关键字段等信息, 对该媒体内容 进行緩存。 本发明实施例不限制緩存媒体内容的目的, 可以根据系统需要制 定緩存策略, 相应地, 该緩存模块根据制定的緩存策略执行相应的緩存动作。
综上所述, 本发明实施例提供的边缘播放节点, 利用该边缘播放节点获 取到对等存储网络中的媒体内容, 然后将该媒体内容提供给终端用户, 从而 实现了大大减少现有的内容网络中的存储冗余,降低网络的管理和维护成本、 提高网络的可靠性的目的。
实施例 4
参见图 13 , 图 13是本发明实施例 4提供的终端设备的示意图, 终端设 备包括:
获取模块 , 用于获取媒体内容所在对等存储节点的位置信息;
发送模块, 用于发送业务请求, 业务请求中携带用户欲获取的媒体内容 的标识和获取模块获取的媒体内容所在对等存储节点的位置信息。
本发明实施例提供的终端设备, 通过在用户的业务请求中携带欲获取的 媒体内容的标识和该媒体内容所在对等存储节点的位置信息, 实现边缘播放 节点根据业务请求中的位置信息, 获取位置信息对应的对等存储节点存储的 媒体内容, 从而提高了从对等存储网络获取媒体内容的速度, 提高了获取媒 体内容的获取效率。
实施例 5
参见图 14 , 图 14是本发明实施例 5提供的分发设备的示意图, 分发设 备包括:
策略模块, 用于获取分发策略;
分发模块, 用于根据策略模块获取的分发策略, 将媒体内容分发到对等 存储网络中的对等存储节点。
其中, 上述策略模块包括:
第一策略单元, 用于获取第一分发策略, 第一分发策略为根据分发范围 中的对等存储节点的负载, 将媒体内容均匀分发到所述对等存储节点中; 相应地, 分发模块包括:
第一分发单元, 用于根据第一策略单元获取的第一分发策略, 将媒体内 容均勾分发到对等存储网络中的对等存储节点。
其中, 上述策略模块包括:
第二策略单元, 用于获取第二分发策略, 第二分发策略为根据预设的对 等网络算法 , 将媒体内容分发到目标对等存储节点;
相应地, 分发模块包括:
第二分发单元, 用于获取目标对等存储节点, 根据第二策略单元获取的 第二分发策略, 将媒体内容分发到目标对等存储节点。
其中, 第二分发单元具体包括:
获取子单元, 用于获取待分发的媒体内容的标识, 以及根据预设的对等 网络算法获取目标对等存储节点的标识;
映射子单元, 用于将获取子单元获取的媒体内容的标识映射到至少一个 目标对等存储节点的标识;
分发子单元, 用于根据映射单元映射后获取的映射关系, 将媒体内容分 发到目标对等存储节点。 进行媒体内容分发的, 该对等存储网络在进行媒体内容的分发时, 可以根据 具体的网络配置系统需要实现媒体内容的分发, 例如把媒体内容分发到对等 网络中不同范围的对等存储节点 MSF上, 可以为全网范围内进行内容分发, 也可以为区域范围内的内容分发。
a )可以根据对等存储网络中各对等存储节点的负载, 将媒体内容均匀分 发到各 MSF;
b )也可以根据特定对等网络算法, 例如对等节点 (Peer to Peer, 以下简 称: P2P ) /分散式哈希表技术算法( Distributed Hash Table , 以下简称: DHT ) 进行分布化计算, 根据计算结果选择分发的目标 MSF, 实现媒体内容的均衡 分发。 具体为: 每个对等存储节点具有节点标识(Node-ID ) (对应本实施例, 分别为 Node-ID-MSFl、 Node-ID-MSF2 Node-ID-MSFm
Node-ID-MSFn ) , 媒体内容具有资源标识(对应本实施例为 Resource-ID ) , 根据预设的映射算法, 将 Resource-ID 分别映射到 Node-ID-MSFl 和 Node-ID-MSF2, 媒体内容根据映射关系分发存储到 MSF1和 MSF2节点。
本发明实施例提供的分发设备, 通过该分发设备成功实现向对等存储网 络分发媒体内容的目的, 根据系统的配置需要实现媒体内容的分发, 提高了 分发的效率, 有效地避免了分发过程中出现的冗余等问题。 相应地, 边缘播 放节点也可以通过获取到对等存储网络中的媒体内容, 然后将该媒体内容提 供给终端用户, 从而实现了大大减少现有的内容网络中的存储冗余, 降低网 络的管理和维护成本、 提高网络的可靠性的目的。
实施例 6
参见图 15 , 图 15是本发明实施例 6提供的基于对等存储网络提供内容 的系统示意图, 其中, 该系统包括: 边缘播放节点和至少一个对等存储节点; 对等存储节点构成对等存储网络;
边缘播放节点, 用于接收终端用户发送的业务请求, 根据业务请求中携 带的媒体内容的标识, 向对等存储节点获取媒体内容后, 将获取的媒体内容 提供给终端用户;
对等存储节点, 用于存储根据预设的分发策略分发的媒体内容; 并根据 边缘播放节点的请求, 向边缘播放节点提供媒体内容。
其中, 上述边缘播放节点具体包括:
接收模块, 用于接收终端用户发送的业务请求;
获取模块, 用于根据接收模块接收到的业务请求中携带的媒体内容的标 识, 向对等存储节点获取媒体内容;
提供模块, 用于将获取模块获取的媒体内容提供给终端用户。
(一) 、 当业务请求中携带终端用户欲获取的媒体内容的标识时, 上述 边缘播放节点的获取模块具体用于根据接收模块接收到的业务请求中携带的 终端用户欲获取的媒体内容的标识和预设的对等网络算法, 获取目标对等存 储节点, 从至少一个目标对等存储节点获取媒体内容。
该获取模块具体包括:
获取单元, 用于根据接收模块接收到的业务请求中携带的终端用户欲获 取的媒体内容的标识和预设的对等网络算法, 获取目标对等存储节点;
第一选择单元, 用于根据地理位置优先算法选择获取单元获取的目标对 等存储节点, 从选择出的至少一个目标对等存储节点获取媒体内容;
第二选择单元, 用于根据处理能力优先算法选择获取单元获取的目标对 等存储节点, 从选择出的至少一个目标对等存储节点获取媒体内容。 (二) 、 当业务请求中携带终端用户欲获取的媒体内容的标识和存储欲 获取的媒体内容的对等存储节点的位置信息时, 上述边缘播放节点的获取模 块具体用于根据接收模块接收的业务请求, 从至少一个位置信息对应的对等 存储节点获取媒体内容。
进一步地,本发明实施例提供的系统中的边缘播放节点还包括緩存模块, 緩存模块用于緩存获取的媒体内容, 其中, 上述緩存模块具体包括:
判断单元, 用于判断媒体内容被获取的频率是否达到预设阀值; 緩存单元, 用于当判断单元判断的结果为是, 则緩存媒体内容。
通过增加该緩存模块, 从而实现了当收到后续访问该媒体内容的终端用 户的业务请求时, 便可以直接提取緩存的该媒体内容发送给用户, 从而进一 步地, 提高了访问效率、 减少了网络带宽的浪费。
本发明实施例提供緩存模块在具体实现时, 还可以根据媒体内容中的标 识或者根据媒体内容中的关键字段等信息, 对该媒体内容进行緩存。 本发明 实施例不限制緩存媒体内容的目的, 可以根据系统需要制定緩存策略, 相应 地, 该緩存模块根据制定的緩存策略执行相应的緩存动作。
参见图 16 , 图 16是本发明实施例 6提供的基于对等存储网络提供内容 的系统的另一示意图, 进一步地, 为了实现对等存储网络中的对等存储节点 的媒体内容的存储, 系统还包括分发设备, 该分发设备具体包括:
策略模块, 用于获取分发策略;
分发模块, 用于根据策略模块获取的分发策略, 将媒体内容分发到对等 存储网络中的对等存储节点。
其中, 上述策略模块包括: 第一策略单元, 用于获取第一分发策略, 第一分发策略为根据分发范围 中的对等节点的负载, 将媒体内容均匀分发;
相应地, 分发模块包括:
第一分发单元, 用于根据第一策略单元获取的第一分发策略, 将媒体内 容均勾分发到对等存储网络中的对等存储节点。
其中, 上述策略模块包括:
第二策略单元, 用于获取第二分发策略, 第二分发策略为根据预设的对 等网络算法 , 将媒体内容分发到目标对等存储节点;
相应地, 分发模块包括:
第二分发单元, 用于获取目标对等存储节点, 根据第二策略单元获取的 第二分发策略, 将媒体内容分发到目标对等存储节点。
其中, 第二分发单元具体包括:
获取子单元, 用于获取待分发的媒体内容的标识, 以及根据预设的对等 网络算法获取目标对等存储节点的标识;
映射子单元, 用于将获取子单元获取的媒体内容的标识映射到至少一个 目标对等存储节点的标识;
分发子单元, 用于根据映射单元映射后获取的映射关系, 将媒体内容分 发到目标对等存储节点。
综上所述, 本发明实施例提供的基于对等存储网络提供内容的系统, 引 入对等存储网络, 通过对等存储网络向终端用户提供媒体内容, 从而实现了 大大减少现有的内容网络中的存储冗余, 降低网络的管理和维护成本、 提高 网络的可靠性的目的。 实施例 7
本发明实施例提供了一种对等存储网络存储节点, 用于存储根据预设的 分发策略分发的媒体内容; 并根据边缘播放节点的请求向边缘播放节点提供 媒体内容。
综上所述, 本发明实施例提供的技术方案, 引入对等存储网络, 通过对 等存储网络向终端用户提供媒体内容, 从而实现了消除存储冗余, 提高存储 资源的使用效率,避免在较大规模的层次化 CDN中大量中间层次緩存节点的 副本数。 在对等存储网络中同一媒体内容仅存在最多 2到 3个副本(多于 1 个副本是为了保证可靠性), 有效解决了在大规模的层次化 CDN中, 出现的 位于中间层次中的大量副本数的问题; 还使得管理维护简单化。 仅需要在媒 体内容初始发布时, 把媒体内容均衡分发到多个对等存储节点, 之后不需再 进行其它分发管理操作。 边缘播放节点也不需预先分发, 第一次从存储网络 获取某媒体内容后, 如用户访问频度高到定义的阀值时, 则将该媒体内容緩 存在边缘播放节点上, 一个合适的緩存管理即可以实现此功能; 进一步地, 提升了网络的可靠性, 存储网络单点故障不影响业务; 每一个存储节点都可 以为全网用户服务, 灵活支持地域化内容发布管理和促进内容共享。
本发明实施例中的全部或部分步骤, 可以利用软件实现, 相应的软件程 序可以存储在可读取的存储介质中, 如光盘或硬盘等。
以上所述仅为本发明的具体实施例, 并不用以限制本发明, 对于本技术 领域的普通技术人员来说, 凡在不脱离本发明原理的前提下, 所作的任何修 改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权利要求
1、 一种基于对等存储网络提供内容的方法, 其特征在于, 包括: 根据预设的分发策略, 将媒体内容分发到对等存储节点中, 所述对等存 储节点构成对等存储网络;
边缘播放节点根据终端用户的业务请求, 从所述对等存储网络获取媒体 内容, 所述业务请求中携带媒体内容的标识;
所述边缘播放节点将获取的媒体内容提供给所述终端用户。
2、如权利要求 1所述的基于对等存储网络提供内容的方法,其特征在于, 所述根据预设的分发策略, 将媒体内容分发到对等存储节点中, 具体包括: 按照预设的全网分发范围, 将媒体内容分发到所述全网分发范围中的至 少一个对等存储节点中; 或,
按照预设的区域分发范围, 将媒体内容分发到所述区域分发范围中的至 少一个对等存储节点中。
3、如权利要求 2所述的基于对等存储网络提供内容的方法,其特征在于, 所述将媒体内容分发到对等存储节点中 , 具体包括:
根据对等存储网络中对等存储节点的负载, 将媒体内容均勾分发到所述 对等存储节点中; 或,
根据预设的对等网络算法, 获取目标对等存储节点的信息, 将媒体内容 分发到目标对等存储节点中。
4、如权利要求 3所述的基于对等存储网络提供内容的方法,其特征在于, 所述根据预设的对等网络算法, 获取目标对等存储节点的信息, 具体包括: 根据所述媒体内容的标识和对等存储节点的节点标识, 将所述媒体内容 的标识映射到至少一个对等存储节点的节点标识;
根据所述映射关系,确定所述媒体内容需要分发到的目标对等存储节点。
5、如权利要求 1所述的基于对等存储网络提供内容的方法,其特征在于, 所述边缘播放节点根据终端用户的业务请求,从对等存储网络获取媒体内容, 具体包括:
边缘播放节点接收终端用户的业务请求, 所述业务请求中携带终端用户 欲获取的媒体内容的标识; 根据预设的对等网络算法和所述欲获取的媒体内 容的标识, 获取目标对等存储节点的信息, 从至少一个所述目标对等存储节 点获取媒体内容。
6、如权利要求 5所述的基于对等存储网络提供内容的方法,其特征在于, 当多个目标对等存储节点存储有所述欲获取的媒体内容时, 所述从至少一个 所述目标对等存储节点获取媒体内容, 具体为:
所述边缘播放节点根据地理位置优先算法选择至少一个目标对等存储节 点, 从选择出的目标对等存储节点获取媒体内容; 或,
所述边缘播放节点根据处理能力优先算法选择至少一个目标对等存储节 点, 从选择出的目标对等存储节点获取媒体内容。
7、如权利要求 6所述的基于对等存储网络提供内容的方法,其特征在于, 所述从选择出的目标对等存储节点获取媒体内容, 具体为:
从选择出的第一目标对等存储节点获取媒体内容, 如果从所述第一目标 对等存储节点获取媒体内容失败, 则从选择出的下一目标对等存储节点获取 媒体内容。
8、如权利要求 1所述的基于对等存储网络提供内容的方法,其特征在于, 所述根据预设的分发策略, 将媒体内容分发到对等存储节点中的步骤之后还 包括:
将所述媒体内容的标识和所述媒体内容所在对等存储节点的位置信息通 知终端用户; 相应地,
所述边缘播放节点根据终端用户的业务请求, 从所述对等存储网络获取 媒体内容, 具体包括:
边缘播放节点接收终端用户的业务请求, 所述业务请求中携带终端用户 欲获取的媒体内容的标识和所述媒体内容所在对等存储节点的位置信息; 根据所述业务请求, 向至少一个所述位置信息对应的对等存储节点获取 媒体内容。
9、如权利要求 1所述的基于对等存储网络提供内容的方法,其特征在于, 所述边缘播放节点将获取的媒体内容提供给所述终端用户, 具体为:
所述边缘播放节点将获取的媒体内容编码流化后,提供给所述终端用户。
10、 如权利要求 1所述的基于对等存储网络提供内容的方法, 其特征在 于, 所述方法还包括:
所述边缘播放节点緩存获取的媒体内容。
11、如权利要求 10所述的基于对等存储网络提供内容的方法, 其特征在 于, 所述边缘播放节点緩存获取的媒体内容, 具体为:
边缘播放节点判断所述媒体内容被获取的频率是否达到预设阔值, 如果 是, 则緩存所述媒体内容。
12、 一种边缘播放节点, 其特征在于, 包括:
接收模块, 用于接收终端用户发送的业务请求; 获取模块, 用于根据所述接收模块接收到的业务请求, 从对等存储节点 获取媒体内容;
提供模块, 用于将所述获取模块获取的媒体内容提供给所述终端用户。
13、 如权利要求 12所述的边缘播放节点, 其特征在于, 所述获取模块具 体用于根据所述接收模块接收到的业务请求中携带的媒体内容的标识和预设 的对等网络算法, 获取目标对等存储节点的信息, 从至少一个所述目标对等 存储节点获取媒体内容。
14、 如权利要求 13所述的边缘播放节点, 其特征在于, 所述获取模块具 体包括:
获取单元, 用于根据所述接收模块接收到的业务请求中携带的媒体内容 的标识和预设的对等网络算法, 获取目标对等存储节点的信息;
第一选择单元, 用于根据地理位置优先算法和所述获取单元获取的目标 对等存储节点的信息, 选择目标对等存储节点, 从选择出的至少一个所述目 标对等存储节点获取欲获取的媒体内容;
第二选择单元, 用于根据处理能力优先算法和所述获取单元获取的目标 对等存储节点的信息, 选择目标对等存储节点, 从选择出的至少一个所述目 标对等存储节点获取媒体内容。
15、 如权利要求 12所述的边缘播放节点, 其特征在于, 所述获取模块具 体用于根据所述接收模块接收的业务请求中携带的媒体内容的标识和所述媒 体内容所在对等存储节点的位置信息, 向至少一个所述位置信息对应的对等 存储节点获取媒体内容。
16、 如权利要求 12所述的边缘播放节点, 其特征在于, 所述边缘播放节 点还包括緩存模块, 用于緩存所述获取模块获取的媒体内容。
17、 如权利要求 16所述的边缘播放节点, 其特征在于, 所述緩存模块具 体包括:
判断单元, 用于判断所述媒体内容被获取的频率是否达到阀值; 緩存单元, 用于当所述判断单元判断的结果为是, 则緩存所述媒体内容。
18、 一种终端设备, 其特征在于, 所述终端设备包括:
获取模块 , 用于获取媒体内容所在对等存储节点的位置信息;
发送模块, 用于发送业务请求, 所述业务请求中携带用户欲获取的媒体 内容的标识和所述获取模块获取的媒体内容所在对等存储节点的位置信息。
19、 一种分发设备, 其特征在于, 所述分发设备包括:
策略模块, 用于获取分发策略;
分发模块, 用于根据所述策略模块获取的分发策略, 将媒体内容分发到 对等存储网络中的对等存储节点。
20、 如权利要求 19所述的分发设备, 其特征在于, 所述策略模块包括: 第一策略单元, 用于获取第一分发策略, 所述第一分发策略为根据分发 范围中的对等存储节点的负载,将媒体内容均匀分发到所述对等存储节点中; 相应地, 所述分发模块包括:
第一分发单元, 用于根据所述第一策略单元获取的第一分发策略, 将媒 体内容均勾分发到对等存储网络中的对等存储节点。
21、 如权利要求 19所述的分发设备, 其特征在于, 所述策略模块包括: 第二策略单元, 用于获取第二分发策略, 所述第二分发策略为根据预设 的对等网络算法, 将媒体内容分发到目标对等存储节点; 相应地, 所述分发模块包括:
第二分发单元, 用于获取目标对等存储节点, 根据所述第二策略单元获 取的第二分发策略, 将媒体内容分发到所述目标对等存储节点。
22、 如权利要求 21所述的分发设备, 其特征在于, 所述第二分发单元具 体包括:
获取子单元, 用于获取待分发的媒体内容的标识, 以及根据预设的对等 网络算法获取目标对等存储节点的标识; 至少一个目标对等存储节点的标识;
分发子单元, 用于根据所述映射单元映射后获取的映射关系, 将所述媒 体内容分发到所述目标对等存储节点。
23、 一种基于对等存储网络提供内容的系统, 其特征在于, 所述系统包 括: 边缘播放节点和至少一个对等存储节点; 所述对等存储节点构成对等存 储网络;
所述边缘播放节点, 用于接收终端用户发送的业务请求, 根据所述业务 请求中携带的媒体内容的标识, 向所述对等存储节点获取媒体内容后, 将所 述获取的媒体内容提供给所述终端用户;
所述对等存储节点, 用于获取根据预设的分发策略分发的媒体内容; 并 根据所述边缘播放节点的请求, 向所述边缘播放节点提供所述媒体内容。
24、如权利要求 23所述的基于对等存储网络提供内容的系统, 其特征在 于, 所述边缘播放节点具体包括:
接收模块, 用于接收终端用户发送的业务请求; 获取模块, 用于根据所述接收模块接收到的业务请求中携带的媒体内容 的标识, 向所述对等存储节点获取媒体内容;
提供模块, 用于将所述获取模块获取的媒体内容提供给所述终端用户。
25、如权利要求 24所述的基于对等存储网络提供内容的系统, 其特征在 于 , 所述获取模块具体用于根据所述接收模块接收到的业务请求中携带的媒 体内容的标识和预设的对等网络算法和所述欲获取的媒体内容的标识, 获取 目标对等存储节点, 向至少一个所述目标对等存储节点获取媒体内容。
26、如权利要求 24所述的基于对等存储网络提供内容的系统, 其特征在 于, 所述获取模块具体用于根据所述接收模块接收的业务请求中携带的媒体 内容的标识和所述媒体内容所在对等存储节点的位置信息, 向至少一个所述 位置信息对应的对等存储节点获取媒体内容。
27、如权利要求 23所述的基于对等存储网络提供内容的系统, 其特征在 于, 所述系统还包括: 分发设备, 所述分发设备具体包括:
策略模块, 用于获取分发策略;
分发模块, 用于根据所述策略模块获取的分发策略, 将媒体内容分发到 对等存储网络中的对等存储节点。
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