CN102170456A - Method, device and system for acquiring content in PPN (peer-to-peer network) - Google Patents
Method, device and system for acquiring content in PPN (peer-to-peer network) Download PDFInfo
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- CN102170456A CN102170456A CN2010101171964A CN201010117196A CN102170456A CN 102170456 A CN102170456 A CN 102170456A CN 2010101171964 A CN2010101171964 A CN 2010101171964A CN 201010117196 A CN201010117196 A CN 201010117196A CN 102170456 A CN102170456 A CN 102170456A
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Abstract
The invention discloses a method, device and system for acquiring content in a PPN (peer-to-peer network). The method comprises the following steps: a request node transmits a first request message to the PPN, and the first request message carries a mark of the content which is required to be acquired; the PPN transmits a response message to the request node, carries and stores the address information of a first network storage unit of the content, and the first network storage unit is a network storage space distributed to a source node; and the request node transmits a second request message to the first network storage unit according to the address information, and the first network storage unit transmits requested content to the request node according to the second request message. By the embodiment of the invention, the request node can obtain the request content, so that the condition that in a DECADE system, the content request fails due to the occurrence of NAT between the request node and the source node can be avoided, and the consumption of network resources is reduced.
Description
Technical field
The present invention relates to the network communications technology, relate in particular to that a kind of (Peer-to-Peer P2P) obtains the methods, devices and systems of content in the network in equity.
Background technology
Point-to-point (Peer-to-Peer, P2P) be the technology of end-to-end direct swap data or service between a kind of personal user of being used for, it provides the ability of distributed swap data, and server only manages with being connected the user is online, not responsiblely provides resource downloading to the user.A large amount of P2P uses and is more and more taking the ISP (Internet Service Provider, Internet resources ISP) have caused access link, backbone links and cross-domain link congested.Use the taking of Internet resources in order to reduce P2P, ISP has disposed P2P Cache and has solved this problem.By by P2P Cache storage P2P content, and P2P user's request is directed to P2P Cache, comes to provide content by P2P Cache, thereby reduced last uplink bandwidth and cross-domain flow rate to the user.P2P Cache is divided into transparent cache and nontransparent cache.For transparent cache, the user does not perceive, but resolve the P2P message by the network equipment of ISP, revise the P2P response message, allow P2P Cache appear in the node listing that resource can be provided, P2P user can connect P2P Cache with the service of obtaining according to the nodal information in the node listing then.Nontransparent cache does not need the network equipment to resolve the P2P message, but needs a kind of mechanism that P2P should be used for finding and use P2P cache.
P2P Cache is when saving flow to ISP, the maintenance of itself also becomes problem, because P2PCache is the peer node used as that P2P when service being provided for each P2P user, but exist at present and comprise Bittorrent, BitComet, a sudden peal of thunder, the P2P that eMule etc. are very many uses, and these agreements of using use have nothing in common with each other, so need P2P Cache to support very many P2P agreements, and these agreements are during upgrading what do not stop, cause the maintenance of P2P Cache very complicated.
In order to overcome the defective of P2P Cache, industry has proposed a kind of application data route (DECoupled Application Data Enroute of separation, DECADE) thinking, by allowing P2P use content stores on the network storage equipment, and Control Network memory device, the content that P2P user is asked is sent to final P2P user from the network storage equipment, reduced the application of final jump bandwidth, and access and control protocol by standard have reduced the complexity problem of existing P2P Cache system.
Yet, the inventor finds in research process, do not provide a kind of method in the existing DECADE technology, make the P2P user of request content, under the prerequisite of the content stores of being asked at certain network storage equipment, one obtains the content of being asked surely and reduces the consumption of Internet resources from the DECADE system.
Summary of the invention
In order to overcome the problems referred to above, the embodiment of the invention provides the methods, devices and systems that obtain content in a kind of peer-to-peer network, is used for obtaining content that the user asks and the consumption that reduces Internet resources in the DECADE system.
The method of obtaining content in the peer-to-peer network that the embodiment of the invention provides comprises: send first request message to described peer-to-peer network, carry the sign of the content of acquisition request in described first request message; Receive the response message that described peer-to-peer network sends, carry the address information of first network storage unit of the described content of storage in the described response message, described first network storage unit is the network storage space of distributing to the source node of described content; Send second request message according to described address information to described first network storage unit, carry the sign of described content in described second request message; Receive the content that described first network storage unit sends.
The device that obtains content in the peer-to-peer network that the embodiment of the invention provides comprises: first transmitting element, be used for sending first request message to described peer-to-peer network, and carry the sign of the content of acquisition request in described first request message; First receiving element is used to receive the response message that described peer-to-peer network sends, and carries the address information of first network storage unit of the described content of storage in the described response message; Second transmitting element sends second request message according to described address information to described first network storage unit, carries the sign of described content in described second request message; Second receiving element receives the content that described first network storage unit sends.
The system that obtains content in the peer-to-peer network that the embodiment of the invention provides comprises: comprising: requesting node, peer-to-peer network and first network storage unit, wherein, the described request node, be used for sending first request message, carry the sign of the content of acquisition request in described first request message to described peer-to-peer network; Receive the response message that described peer-to-peer network sends, carry the address information of first network storage unit of the described content of storage in the described response message; Send second request message according to described address information to described first network storage unit, carry the sign of described content in described second request message; Receive the content that described first network storage unit sends; Described peer-to-peer network is used for sending described response message according to described first request message to the described request node; Described first network storage unit is used for sending described content according to described second request message to the described request node.
By implementing the present invention, can make requesting node obtain the content of being asked, avoid in the DECADE system because of there being the caused content requests failure of NAT between requesting node and the source node, and reduce consumption Internet resources.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is for obtaining the schematic flow sheet of the method embodiment of content in the peer-to-peer network provided by the invention;
Fig. 2 is for obtaining the structural representation of the device embodiment of content in the peer-to-peer network provided by the invention;
Fig. 3 is the structural representation of network system embodiment provided by the invention.
Embodiment
Below by embodiment specific implementation process of the present invention is exemplified explanation.Obviously, the embodiments described below are the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
Various embodiments of the present invention are applied in the P2P DECADE system, and method, device and the network system of obtaining content in the peer-to-peer network are provided respectively.Peer-to-peer network among the present invention can be non-structural P 2 P network or structured P 2 P network, wherein, is provided with the content indexing that index server tracker stores each peer node in the non-structural P 2 P network.Structured P 2 P network comprises that distributed hashtable (can finish content by the cooperation between the peer node and find by Distribute Hash Table, DHT) network.
In the present invention, peer node (comprising requesting node and source node) is according to CAMEL-Subscription-Information or registration condition, can on the network storage equipment, have oneself independently network storage unit, peer node is stored in one's own resource on the corresponding network storage unit, in the time of content distributed, as long as the address information of content identification and the network storage unit of oneself is released.Like this, hope is obtained the peer node of content and only need be followed the network storage unit of the source node correspondence of this content to connect, and it is just passable to obtain content from this network storage unit, has avoided the network resource consumption that causes in a large number between the peer node.
In one embodiment of the invention, the source node that has content X is to P2P network (index server tracker or the DHT network) sign of content distributed X and the address of source node oneself.When requesting node need obtain content X, send a request message, carry the sign of content X to the P2P network.The P2P network returns the address of the source node that has content X to this requesting node.Requesting node according to this address to source node request content X.The address notification requesting node of source node general oneself network storage unit in network storage space.At last, requesting node obtains content X from the network storage unit of source node.
The foregoing description can make from P2P network requests requests for content node and obtain the content of being asked and reduce the consumption of Internet resources from the DECADE system.
In the networking of reality, (Network AddressTranslator NAT), is used for carrying out the isolation of private network and public network often a lot of network address translaters.If the source node of content X is positioned at after the NAT in the foregoing description, so,, still can not connects, thereby cause the content requests failure with source node though requesting node has obtained the address of source node from the P2P network.
For this reason, the embodiment of the invention also provides the method for obtaining content in a kind of peer-to-peer network in addition.As shown in Figure 1, for obtaining the schematic flow sheet of the other method embodiment of content in the peer-to-peer network provided by the invention.The described method of present embodiment comprises:
S120, send first request message, carry the sign of the content of acquisition request in this first request message to peer-to-peer network.
When requesting node need be asked certain content, according to the difference of network system, send first request message to content index server tracker or distributed hashtable DHT network, carry the sign of this content in this first request message.
The response message that S140, reception peer-to-peer network send, the address information of carrying first network storage unit of the described content of storage in the described response message; Described first network storage unit is the network storage space of distributing to the source node of described content.
After index server tracker or DHT network are received this first request message, sign according to the content of wherein carrying, the address information of searching the source node that described content can be provided and distributing to first network storage unit of this source node, send response message to this requesting node then, carry the address information of first network storage unit of this content of storage in response message, this address information can be the address or the uniform resource position mark URL of this first network storage unit.Requesting node receives this response message.
S160, send second request message to described first network storage unit, carry the sign of described content in this second request message according to described address information.
After requesting node is received described response message, obtain the address information of first network storage unit that wherein carries, send second request message to first network storage unit then, carry the sign of described content in this second request message.
The content that S180, described first network storage unit of reception send.
After this second request message is received in first network storage unit, according to the sign of the content of wherein carrying, send content to requesting node, requesting node receives the content that described first network storage unit sends.
Before step S120, said method embodiment of the present invention can further include the step of address information that source node is issued the sign of described content and stored first network storage unit of described content to peer-to-peer network.
Source node is by registration or signatory getting access to after first network of distributing to oneself deposits the address information of memory cell, the content stores that self is all on first network storage unit, the address information issuing the sign of described content and store first network storage unit of described content of the peer node in index server tracker or DHT network then.
To send described second request message according to the address information of described first network storage unit to described second network storage unit specifically can be that requesting node promptly sends second request message to described first network storage unit in second network storage unit by the network storage space of oneself to requesting node among the above-mentioned steps S160.Among the step S180, requesting node also can receive the content that first network storage unit sends by second network storage unit.And, the content that first network storage unit sends also can be stored in second network storage unit, like this, requesting node another source node of also can be used as this content is issued the sign of described content and the address information of described second network storage unit to index server tracker or DHT network.
In the above embodiment of the present invention, source node can also be issued the sign ID1 of this content in peer-to-peer network and the sign ID2 of this content in first network storage unit simultaneously in the content distributed sign of index server tracker or DHT network.Like this, among the step S120, the sign of the content that comprises in first request message is the sign ID1 of this content in peer-to-peer network; Among the step S140, index server tracker or DHT network not only comprise the address information of first network storage unit in the response message that requesting node sends, also comprise the sign ID2 of described content in first network storage unit; Among the step S160, the content identification of carrying in second request message that requesting node sends is the sign ID2 of described content in first network storage unit.Similarly, if second network storage unit need be issued the sign of described content to index server tracker or DHT network, also can issue the sign ID1 of this content in peer-to-peer network and the sign ID3 of this content in second network storage unit simultaneously.
By the method in the embodiment of the invention, can make requesting node obtain the content asked, avoid in the DECADE system because of there being the caused content requests failure of NAT between requesting node and the source node, and reduce consumption Internet resources.
Among the said method embodiment of the present invention, when peer node (comprising requesting node and source node) when index server tracker or DHT network are issued the address information of the sign of described content and corresponding network storage unit, described index server tracker or DHT network obtain the corresponding certificate of described peer node, binding relationship according to peer node in this certificate and network storage unit, by this binding relationship the address information of this network storage unit is verified whether have the right to issue the address information of described network storage unit to determine described peer node.Described certificate is contracted or is registered with when obtaining network storage space in peer node by operator and generates, and generates and is distributed to corresponding peer node afterwards.
Index server tracker or DHT network can be avoided the not one's own network storage of peer node malice issue unit by adopting the content distributed peer node of certification authentication in the present embodiment, guarantee to issue the legitimacy of behavior, have guaranteed network security.
The embodiment of the invention provides the device that obtains content in a kind of peer-to-peer network in addition, is used to realize method described in the above embodiment of the present invention.
As shown in Figure 2, the structural representation for the device embodiment that obtains content in the peer-to-peer network provided by the invention comprises:
First transmitting element 220 is used for sending first request message to peer-to-peer network, carries the sign of the content of acquisition request in this first request message.
First receiving element 240 is used to receive the response message that peer-to-peer network sends, and carries the address information of first network storage unit of the described content of storage in the described response message; Described first network storage unit is the network storage space of distributing to the source node of described content.
Second transmitting element 260 is used for sending second request message according to described address information to described first network storage unit, carries the sign of described content in this second request message.
Second receiving element 280 is used to receive the content that described first network storage unit sends.
Wherein, described second transmitting element 260 sends second request message to described first network storage unit, can be that described second transmitting element directly sends second request message to described first network storage unit, also can be that second transmitting element sends second request message by second network storage unit to described first network storage unit, this second network storage unit be the network storage space of distributing to the described request node.
Second receiving element 280 also can receive the content of being asked by second network storage unit from first network storage unit.And second network storage unit further is stored the content that first network storage unit sends.In this case, the device that obtains content in this peer-to-peer network can further include release unit, be used for after the content of described reception has been stored in this second network storage unit, issuing the sign of described content and the address information of described second network storage unit to peer-to-peer network.
The sign of the content of carrying in this first request message is the sign ID1 of this content in peer-to-peer network; The sign of the content of carrying in this second request message both can be the sign ID1 of this content in peer-to-peer network, also can be the sign ID2 of this content in first network storage unit.When the content in second request message be designated the sign ID2 of this content in first network storage unit time, the address information of not only carrying first network storage unit in the response message that this first receiving element receives is also carried the sign ID2 of this content in first network storage unit.Further, release unit can be issued the sign ID1 of this content in the P2P peer-to-peer network and the address information of second network storage unit when the P2P network is issued this content; Also can issue sign ID1, this content sign ID3 in second network storage unit and the address information of second network storage unit of this content in the P2P peer-to-peer network.
By embodiment of the invention said apparatus, in the time of can realizing this device as requesting node, from the BECADE system, obtain the content of being asked, avoid between requesting node and the source node because of there being the caused content requests failure of NAT, and reduce consumption Internet resources.
The embodiment of the invention provides a kind of network system in addition, is used to realize method described in the above embodiment of the present invention.
As shown in Figure 3, be the structural representation of network system in the embodiment of the invention.This network system comprises: requesting node 310, peer-to-peer network 320 and first network storage unit 330.Wherein, peer-to-peer network can be network or the DTH network that comprises index server tracker.
Requesting node sends first request message to peer-to-peer network when content X is obtained in hope, the sign of carrying the content X of acquisition request in this first request message.Peer-to-peer network is received after this request message, searches the network storage unit of this content of storage according to this sign, supposes to find first network storage unit.Peer-to-peer network returns response message to requesting node, carries the address information of first network storage unit of memory contents X.After requesting node is received this response message, send second request message to first network storage unit, the sign of carrying content X in this second request message according to the address information of wherein carrying.After second request message is received in first network storage unit, content X is sent to requesting node according to the sign of content X.Requesting node received content X.
Further, also comprise the source node 340 of content X in this network system, be used for the sign of content X is published to peer-to-peer network.Specifically, source node can the sign ID1 of only content distributed X in peer-to-peer network and oneself network storage space, i.e. the address information of first network storage unit; Also can the sign ID2 of sign ID1, the content X of content distributed X in peer-to-peer network in first network storage unit and the address information of first network storage unit.
When source node issue be the address information of ID1, ID2 and first network storage unit time, peer-to-peer network comprises the address information of the ID2 and first network storage unit in the response message that requesting node returns.That at this moment, requesting node carries in second request message is the sign ID2 of content X in first network storage unit.
Further, the network system in the present embodiment can further include the network storage space of distributing into requesting node, i.e. second network storage unit 350.Requesting node can send second request message to first network storage unit by second network storage unit, and by second network storage unit received content X.When requesting node passes through second network storage unit received content X, second network storage unit further memory contents X.Like this, requesting node has also had content X, and the new source node that also can be used as content X oneself has the information of content X to the peer-to-peer network issue.Specifically, can the sign ID1 of content distributed X in peer-to-peer network and the address information of second network storage unit; Also can the sign ID3 of sign ID1, the content X of content distributed X in peer-to-peer network in second network storage unit and the address information of second network storage unit.First network storage unit and second network storage unit in the present embodiment can be positioned on the identical or different network storage equipment.
By the network system in the embodiment of the invention, can realize that requesting node obtains the content of being asked from the DECADE system, avoid between requesting node and the source node because of there being the caused content requests failure of NAT, and reduce consumption Internet resources.
Among the said method embodiment of the present invention, when peer node (comprising requesting node and source node) during to the address information of the sign of the described content X of peer-to-peer network (index server tracker in the P2P network or DHT network) issue and corresponding network storage unit, described peer-to-peer network obtains the corresponding certificate of described peer node, binding relationship according to peer node in this certificate and network storage unit, by this binding relationship the address information of this network storage unit is verified whether have the right to issue the address information of described network storage unit to determine described peer node.Described certificate is contracted or is registered with when obtaining network storage space in peer node by operator and generates, and generates and is distributed to corresponding peer node afterwards.
Peer-to-peer network can be avoided the not one's own network storage of peer node malice issue unit by adopting the content distributed peer node of certification authentication in the present embodiment, guarantees to issue the legitimacy of behavior, has guaranteed network security.
Through the above description of the embodiments, those skilled in the art can be well understood to the present invention and can realize by the mode that software adds essential hardware platform, can certainly all implement, but the former is better execution mode under a lot of situation by hardware.Based on such understanding, all or part of can the embodying that technical scheme of the present invention contributes to background technology with the form of software product, described software product can be used to carry out above-mentioned method flow.This computer software product can be stored in the storage medium, as ROM/RAM, magnetic disc, CD etc., comprise that some instructions are with so that a computer equipment (can be a personal computer, server, the perhaps network equipment etc.) carry out the described method of some part of each embodiment of the present invention or embodiment.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, and the claim of application documents of the present invention comprises these distortion and variation.
Claims (15)
1. obtain the method for content in the peer-to-peer network, it is characterized in that described method comprises:
Send first request message to described peer-to-peer network, carry the sign of the content of acquisition request in described first request message;
Receive the response message that described peer-to-peer network sends, carry the address information of first network storage unit of the described content of storage in the described response message, described first network storage unit is the network storage space of distributing to the source node of described content;
Send second request message according to described address information to described first network storage unit, carry the sign of described content in described second request message;
Receive the content that described first network storage unit sends.
2. method according to claim 1 is characterized in that, described method also comprises to the content distributed step of described peer-to-peer network:
The address information that source node is issued the sign of described content and stored first network storage unit of described content to described peer-to-peer network.
3. method according to claim 2 is characterized in that, describedly sends second request message according to described address information to described first network storage unit and comprises:
Requesting node sends described second request message by second network storage unit to described first network storage unit according to described address information;
Described second network storage unit is the network storage space of distributing to the described request node.
4. method according to claim 3 is characterized in that, the content that described first network storage unit of described reception sends comprises:
The described request node receives the content that described first network storage unit sends by described second network storage unit.
5. method according to claim 4 is characterized in that, described method also comprises:
The content of described reception is stored in described second network storage unit;
The described request node is issued the sign of described content and the address information of described second network storage unit to described peer-to-peer network.
6. according to any described method among the claim 2-5, it is characterized in that described method also comprises the step that described peer-to-peer network is verified the address information of first network storage unit of described source node issue.
7. method according to claim 6 is characterized in that, the address information of described first network storage unit is verified comprise:
Peer-to-peer network obtains the certificate of described source node, and described certificate comprises the corresponding relation of the address information of described source node and described first network storage unit; Determine according to described corresponding relation whether described source node has the right to issue the address information of described first network storage unit.
8. obtain the device of content in the peer-to-peer network, it is characterized in that, comprising:
First transmitting element is used for sending first request message to described peer-to-peer network, carries the sign of the content of acquisition request in described first request message;
First receiving element is used to receive the response message that described peer-to-peer network sends, and carries the address information of first network storage unit of the described content of storage in the described response message;
Second transmitting element sends second request message according to described address information to described first network storage unit, carries the sign of described content in described second request message;
Second receiving element receives the content that described first network storage unit sends.
9. device according to claim 8 is characterized in that,
Described second transmitting element sends second request message to described first network storage unit, comprise that described second transmitting element sends second request message by second network storage unit to described first network storage unit, described second network storage unit is the network storage space of distributing to the described request node;
Described second receiving element receives the content that described first network storage unit sends, and comprises that described second receiving element receives the content that described first network storage unit sends by described second network storage unit.
10. device according to claim 9 is characterized in that, also comprises:
Release unit is used for issuing the sign of described content and the address information of described second network storage unit to described peer-to-peer network after the content of described reception has been stored in described second network storage unit.
11. a network system is characterized in that, comprising: requesting node, peer-to-peer network and first network storage unit, wherein,
The described request node is used for sending first request message to described peer-to-peer network, carries the sign of the content of acquisition request in described first request message; Receive the response message that described peer-to-peer network sends, carry the address information of first network storage unit of the described content of storage in the described response message; Send second request message according to described address information to described first network storage unit, carry the sign of described content in described second request message; Receive the content that described first network storage unit sends;
Described peer-to-peer network is used for sending described response message according to described first request message to the described request node;
Described first network storage unit is used for sending described content according to described second request message to the described request node.
12. network system according to claim 11 is characterized in that, also comprises:
Source node is used for the address information of issuing described content and storing first network storage unit of described content to described peer-to-peer network.
13. network system according to claim 12 is characterized in that, also comprises:
Second network storage unit is used for second request message according to the transmission of described request node, to the described content of described first network storage unit requests, and will send to the described request node from the content that described first network storage unit receives.
14. network system according to claim 13 is characterized in that, described second network storage unit also is used to store the described content that receives from first network storage unit; The described request node also is used for issuing the sign of content of described reception and the address information of described second network storage unit to described peer-to-peer network.
15. according to any described network system of claim 12-14, it is characterized in that described peer-to-peer network also is used to get the certificate of described source node, described certificate comprises the corresponding relation of the address information of described source node and described first network storage unit; And determine according to described corresponding relation whether described source node has the right to issue the address information of described first network storage unit.
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| CN102664938A (en) * | 2012-04-12 | 2012-09-12 | 北京蓝汛通信技术有限责任公司 | Method and device for controlling downloading of resources |
| CN102917012A (en) * | 2011-09-09 | 2013-02-06 | 微软公司 | Storage and communication de-duplication |
| CN103024085A (en) * | 2013-01-11 | 2013-04-03 | 乐视网信息技术（北京）股份有限公司 | System and method for processing P2P (peer-to-peer) node request |
| CN103107944A (en) * | 2011-11-14 | 2013-05-15 | ***通信集团公司 | Content locating method and route equipment |
| CN103731438A (en) * | 2014-01-28 | 2014-04-16 | 清华大学 | Content transmission method based on region search and delay sensitivity for WSN (Wireless Sensor Network) |
| CN108848141A (en) * | 2018-05-31 | 2018-11-20 | 郑州云海信息技术有限公司 | A kind of response method of server data access and associated method and relevant apparatus |
| CN115004657A (en) * | 2019-11-07 | 2022-09-02 | 华为技术有限公司 | Addressing method, addressing system and addressing device |
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