CN101883124A - Data downloading method, device and system of on-demand system - Google Patents
Data downloading method, device and system of on-demand system Download PDFInfo
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Abstract
The embodiment of the invention discloses a data downloading method, a device and a system of an on-demand system, which relate to the technical field of network communication, and are invented to solve the problem of the prior art that because the network status is quite poor, data fragments of play points cannot be downloaded for a long time. The data downloading method of the on-demand system provided by the embodiment comprises the following steps: obtaining neighbor node parameter information for offering required services; according to the parameter information, selecting a neighbor node with quite good network status to establish connection; sending a data downloading request of the on-demand system to the neighbor node with established connection; and according to the downloading request, obtaining the data of the on-demand system. The invention can improve the smooth playing possibility of the play points of the on-demand system.
Description
Technical field
The present invention relates to the network communications technology field, relate in particular to a kind of data download technology of VOD system.
Background technology
At present, video on-demand system mainly adopts two kinds of patterns: a kind of is customer end/server mode; Another kind is P2P (Peer to Peer, a peer-to-peer network) pattern.
Wherein, the VOD system of P2P pattern is to adopt non-centralized system that the data resource of whole network is managed, thereby uses distributed resource to finish the system of mission critical.Described distributed resource comprises: computing capability, data storage capacities, the network bandwidth and scene etc.; Described mission critical is meant that Distributed Calculation, data/content share communication and collaborative or platform service.P2P utilizes various distributed resources on the Internet to finish the task of various keys.Under this pattern, client be each other server also be client computer, expense is shared to each client computer.Generally all be to adopt piecemeal to download under the P2P pattern, for example: based on the downloading mode of BT (BitTorrent, bit-torrent) file distributing agreement.Under this pattern, client can be downloaded its needed each data slot respectively by different neighbor nodes.But identical data slot can not downloaded from a plurality of nodes simultaneously, has so just avoided the repetition of data, has improved download efficiency.In each data slot process of downloading, each data slot is downloaded by the neighbor node of its connection respectively.If it is to download by a relatively poor opposite end neighbor node of network condition that active client closes on a certain data slot of broadcast point, other data slots downloads then may occur finishes, and this data slot also needs to download for a long time, and the i.e. situation of " blocking " of pausing appears playing in the client of this system like this.
Summary of the invention
The data download method of a kind of VOD system that the embodiment of the invention provides, Apparatus and system can improve the speed of download of VOD system desired data.
For achieving the above object, embodiments of the invention adopt following technical scheme:
On the one hand, the embodiment of the invention provides a kind of data download method of VOD system, comprising:
Obtaining provides the neighbor node of required service parameter information;
According to described parameter information, select neighbor node with quite good network status to connect;
The data download request that sends VOD system is to the described neighbor node that connects;
According to described download request, the data of acquisition point broadcast system.
On the other hand, the embodiment of the invention provides a kind of data download apparatus of VOD system, comprising:
Parameter acquiring unit, being used to obtain provides the neighbor node of required service parameter information;
Linkage unit is used for according to described parameter information, selects neighbor node with quite good network status to connect;
Request transmitting unit is used to send the data download request of VOD system to the described neighbor node that connects;
The data download unit is used for according to described download request the data of acquisition point broadcast system.
On the one hand, the embodiment of the invention also provides a kind of data downloading system of VOD system again, and this system comprises: requesting node, neighbor node and LIST SERVER;
Described LIST SERVER is used to obtain the parameter information of described request node and described neighbor node; According to the parameter information of described request node, inquiry can connect with this requesting node also can provide the neighbor node of required service for this node; The described neighbor node parameter information of required service that provides that transmission inquires is to the described request node;
The described request node, being used to obtain provides the neighbor node of required service parameter information; According to described parameter information, select neighbor node with quite good network status to connect; The data download request that sends VOD system is to the described neighbor node that connects; According to described download request, the data of acquisition point broadcast system;
Described neighbor node is used to receive the download request of described request node; According to the described download request that receives, issue the data of VOD system.
The data download method of a kind of VOD system that the embodiment of the invention provides, Apparatus and system provide the neighbor node of required service parameter information by obtaining, and judge whether the network condition of described neighbor node is good; Thereby select neighbor node with quite good network status to connect; The data download request that sends VOD system is to the described neighbor node that connects; According to described download request, the data of acquisition point broadcast system.Compared with prior art, the embodiment of the invention by network condition good the data of neighbor node place download point broadcast system, make data download time of VOD system be guaranteed, reduced the broadcast pause probability of VOD system.
Description of drawings
The data download method flow chart of a kind of VOD system that Fig. 1 provides for the embodiment of the invention;
The specific implementation flow chart of the data download method of a kind of VOD system that Fig. 2 provides for the embodiment of the invention;
The data download apparatus structural representation of a kind of VOD system that Fig. 3 provides for the embodiment of the invention;
Request transmitting unit 303 structural representations in the data download apparatus of a kind of VOD system that Fig. 5 provides for the embodiment of the invention;
The data downloading system structural representation of a kind of VOD system that Fig. 6 provides for the embodiment of the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is 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.
Data download method, the Apparatus and system of a kind of VOD system that the embodiment of the invention provides are described in detail.
As shown in Figure 1, the data download method of a kind of VOD system that provides for the embodiment of the invention, this method comprises:
101: requesting node obtains by LIST SERVER the neighbor node of required service parameter information is provided; Wherein, the described neighbor node parameter information of required service that provides comprises: provide the required service neighbor node attribute information, the resource information of required service neighbor node is provided and the network address information of required service neighbor node is provided.
102: requesting node selects neighbor node with quite good network status to connect according to described parameter information; Be that requesting node can be by described attribute information, resource information and the network address information that the required service neighbor node can be provided for it that gets access to, calculate and statistics network stability state, bandwidth and delay or the like, thereby select the quite good network status neighbor node to connect.
The described quite good network status neighbor node that it should be noted that among the present invention to be mentioned is not less than 100KB/s for the speed that can provide the service neighbor node to upload data, and time-delay is no more than the neighbor node of 50ms.
103: requesting node sends the data download request of VOD system to the described neighbor node that connects; Promptly by described download request, from the data of neighbor node download point broadcast system.
104: according to described download request, the data of acquisition point broadcast system.
Under the P2P network schemer, below requesting node and the adjacent node mentioned be peer node, can finish simultaneously and download and the function of uploading, be i.e. client and server each other.As shown in Figure 2, the data download method of a kind of VOD system that provides for the embodiment of the invention, this method, the specific implementation process as follows:
201: requesting node obtains the neighbor node parameter information that required service can be provided for it from LIST SERVER; Wherein, the described neighbor node parameter information of required service that provides comprises: provide the required service neighbor node attribute information, the resource information of required service neighbor node is provided and the network address information of required service neighbor node is provided.
202: the described request node is judged network conditions between requesting node and the described neighbor node according to described parameter information; Be that requesting node can be by described attribute information, resource information and the network address information that the required service neighbor node can be provided for it that gets access to, calculate and statistics network stability state, bandwidth and delay or the like, thereby select the quite good network status neighbor node to connect.For example: requesting node determines to provide for it neighbor node of service according to the resource information of the above-mentioned neighbor node that obtains; If determine and to have only one for requesting node provides the neighbor node of service, then obtain the download time t of data by formula t=seg_size/band; Wherein, seg_size is the size of data, and band is for providing the bandwidth of service neighbor node; If deadline is the deadline date that VOD system is played to described data download; If t＞deadline, the speed that data download is described is that network condition is relatively poor too slowly, and then execution in step 204, and abandons downloading; If t＜deadline, then execution in step 203, and from this neighbor node data download.If at least two of the numbers of the neighbor node of service can be provided, need therefrom select only neighbor node this moment and carry out data and download.Principle is that the neighbor node of selecting the bandwidth maximum is the neighbor node that requesting node provides service as the data resource supplier in guaranteeing download required time all nodes less than deadline.
203: if network condition is better, then described request node and described neighbor node connect;
204: if network condition is relatively poor, it is standby that then the described request node is stored the parameter information of described neighbor node.
Need to prove that the neighbor node number that need connect when the described request node is greater than described quite good network status neighbor node number, then requesting node is selected the standby information of neighbor nodes of its storage, connects with it, the download of the line data fragment of going forward side by side.
205: after the broadcast point of user's choice point broadcast system, the requesting node in the Play System will close on the data length of broadcast point according to this broadcast point setting;
206: the described request node is judged whether described data of closing on broadcast point are downloaded and is finished;
207: if described data of closing on broadcast point are downloaded do not finish, the described request node then preferentially sends and closes on the data download request of broadcast point to described quite good network status neighbor node.The specific implementation process of this step is:
The described request node determines to close on the download request of the data slot of broadcast point; Wherein, the described data slot that closes on broadcast point is a described data part of closing on broadcast point; Be that the described broadcast point data of closing on are made up of a plurality of data slots, each data slot is determined a download request; The size of this data slot can dynamically arrange according to the distance of data slot apart from broadcast point; For example: near more apart from broadcast point, it is more little that data slot can be provided with, thereby make that download time short.
According to the distance of described data slot and broadcast point, for described download request is provided with priority; Be that described priority is that the distance of data downloaded fragment and broadcast point as required is provided with; For example: the download request priority apart from the near more data slot of broadcast point is high more, and is low more apart from the download request priority of broadcast point data slot far away more; Be requesting node as required the priority of data downloaded fragment carry out data and download, the data slot download request near apart from broadcast point sends earlier, sends after broadcast point data slot download request far away.
According to described priority, described definite download request is sent to described quite good network status neighbor node.
208: according to described download request, the data of acquisition point broadcast system.
It should be noted that the downloading process of closing on the data of broadcast point in the data download method of described VOD system, can also comprise: size and download time that the data slot that closes on broadcast point is set; For example: the size that can describedly close on the data slot in the data length of broadcast point is set to 8k and downloads, and the data slot beyond the described data length that closes on broadcast point then can be downloaded according to the big or small 16k of routine.Can reach dynamic division like this and guarantee finishing as early as possible of data download, can guarantee that also BitMap (dot matrix image) information updating is too not frequent simultaneously, cause the overhead of system.
If described download time is overtime, then, reselects with described neighbor node and connect, and then download described data slot according to the described parameter information that the service neighbor node is provided;
If described download time is not overtime, then upgrade dot matrix image information.Herein, the dot matrix image information that can upgrade in time according to the download performance of the nearer data slot of distance broadcast point; To will carry out batch updating dot matrix image information apart from broadcast point data slot far away apart from the download performance of broadcast point data slot far away; That is, some is carried out disposable batch updating apart from broadcast point data slot far away.
It is also to be noted that described step 205 can be provided with according to the needs of actual conditions.
The data download method of the VOD system that the embodiment of the invention provides, be retrieved as the neighbor node parameter information that it provides required service by requesting node, judge the network condition of neighbor node, thereby select the quite good network status neighbor node to connect with it, thereby make data download time of VOD system to be guaranteed; Requesting node can also close on the data length of broadcast point by setting for the data playback smoothness that further assurance closes on broadcast point, preferentially downloads the data that this closes on broadcast point; For the further data of closing on broadcast point that guarantee can be finished in instant download, the embodiment of the invention can also be closed on download request transmission priority, data slot size and the download time of data slot in the broadcast point data by setting.
As shown in Figure 3, the data download apparatus of a kind of VOD system that provides for the embodiment of the invention, this device comprises:
Request transmitting unit 303 is used to send the data download request of VOD system to the described neighbor node that connects;
It should be noted that after the broadcast point of user's choice point broadcast system, this device also comprises:
Close on the broadcast point data unit is set, be used to be provided with the data length that closes on broadcast point.
When requesting node transmission download request, can also comprise:
Judging unit is used to judge whether described data of closing on broadcast point are downloaded finishes;
The described request transmitting element is not downloaded and is finished if also be used for described data of closing on broadcast point, and then preferential the transmission closed on the data download request of broadcast point to described quite good network status neighbor node.
It is also to be noted that the data download apparatus of described VOD system is when download closes on the data procedures of broadcast point, this device can also comprise:
Information setting unit is used to be provided with the size and the download time of the data slot that closes on broadcast point;
Reconnect the unit,, then, reselect with described neighbor node and connect, and then download described data slot according to the described parameter information that the service neighbor node is provided if it is overtime to be used for described download time;
Updating block if it is not overtime to be used for described download time, then upgrades dot matrix image information.
As shown in Figure 4, linkage unit 302 structural representations in the data download apparatus of a kind of VOD system that provides for the embodiment of the invention, this unit comprises:
Connect and set up subelement 402, if it is better to be used for network condition, then described request node and described neighbor node connect;
Storing sub-units 403, if it is relatively poor to be used for network condition, it is standby that then the described request node is stored the parameter information of described neighbor node.
As shown in Figure 5, request transmitting unit 303 structural representations in the data download apparatus of a kind of VOD system that provides for the embodiment of the invention, this unit comprises:
Priority is provided with subelement 502, is used for the distance according to described data slot and broadcast point, for described download request is provided with priority;
Request sends subelement 503, is used for according to above-mentioned priority, and described definite download request is sent to the described neighbor node that connects.
As shown in Figure 6, the data downloading system of a kind of VOD system that provides for the embodiment of the invention, this system comprises: LIST SERVER 601, requesting node 602 and neighbor node 603; Wherein, the network schemer of described request node and described neighbor node foundation adopts the peer-to-peer network pattern.
Described LIST SERVER 601 is used to obtain the parameter information of described request node and described neighbor node; According to the parameter information of described request node, inquiry can connect with this requesting node also can provide the neighbor node of required service for this node; The described neighbor node parameter information of required service that provides that transmission inquires is to the described request node;
Described request node 602, being used to obtain provides the neighbor node of required service parameter information; According to described parameter information, select neighbor node with quite good network status to connect; The data download request that sends VOD system is to the described neighbor node that connects; According to described download request, the data of acquisition point broadcast system;
Described neighbor node 603 is used to receive the download request of described request node; According to the described download request that receives, issue the data of VOD system.
Wherein, described request node 602 comprises: the data download apparatus of aforesaid VOD system.
The data download method of a kind of VOD system that the embodiment of the invention provides, Apparatus and system provide the neighbor node of required service parameter information by obtaining, and judge whether the network condition of described neighbor node is good; Thereby select neighbor node with quite good network status to connect; The data download request that sends VOD system is to the described neighbor node that connects; According to described download request, the data of acquisition point broadcast system.Compared with prior art, the embodiment of the invention by network condition good the data of neighbor node place download point broadcast system, make data download time of VOD system be guaranteed, reduced the broadcast pause probability of VOD system.
Through the above description of the embodiments, one of ordinary skill in the art will appreciate that: realize that all or part of step in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, this program is when carrying out, comprise step as above-mentioned method embodiment, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
The above; only be the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; can expect easily changing or replacing, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (15)
1. the data download method of a VOD system is characterized in that, comprising:
Obtaining provides the neighbor node of required service parameter information;
According to described parameter information, select neighbor node with quite good network status to connect;
The data download request that sends VOD system is to the described neighbor node that connects;
According to described download request, the data of acquisition point broadcast system.
2. the data download method of VOD system according to claim 1, it is characterized in that the described neighbor node parameter information of required service that provides comprises: provide the required service neighbor node attribute information, the resource information of required service neighbor node is provided and the network address information of required service neighbor node is provided.
3. the data download method of VOD system according to claim 2 is characterized in that, and is described according to described parameter information, and the step of selecting neighbor node with quite good network status to connect further comprises:
According to described parameter information, judge network conditions between requesting node and the described neighbor node;
If network condition is better, then described request node and described neighbor node connect;
If network condition is relatively poor, it is standby that then the described request node is stored the parameter information of described neighbor node.
4. according to the data download method of any described VOD system in the claim 1 to 3, it is characterized in that, also comprise:
Setting closes on the data length of broadcast point.
5. the data download method of VOD system according to claim 4 is characterized in that, before the step of data download request to the described neighbor node that connects of described transmission VOD system, also comprises:
Judge whether described data of closing on broadcast point are downloaded and finish;
If described data of closing on broadcast point are downloaded do not finish, then preferential the transmission closed on the data download request of broadcast point to described quite good network status neighbor node.
6. the data download method of VOD system according to claim 5 is characterized in that, described preferential transmission closes on the step of the data download request of broadcast point to described quite good network status neighbor node, further comprises:
Determine to close on the download request of the data slot of broadcast point; Wherein, the described data slot that closes on broadcast point is a described data part of closing on broadcast point;
According to the distance of described data slot and broadcast point, for described download request is provided with priority;
According to described priority, described definite download request is sent to described quite good network status neighbor node.
7. the data download method of VOD system according to claim 6 is characterized in that, also comprises:
Setting closes on the size and the download time of the data slot of broadcast point;
If described download time is overtime, then, reselects with described neighbor node and connect, and then download described data slot according to the described parameter information that the service neighbor node is provided;
If described download time is not overtime, then upgrade dot matrix image information.
8. the data download method of VOD system according to claim 7 is characterized in that, described quite good network status neighbor node is not less than 100KB/s for the speed that can provide the service neighbor node to upload data, and time-delay is no more than the neighbor node of 50ms.
9. the data download apparatus of a VOD system is characterized in that, comprising:
Parameter acquiring unit, being used to obtain provides the neighbor node of required service parameter information;
Linkage unit is used for according to described parameter information, selects neighbor node with quite good network status to connect;
Request transmitting unit is used to send the data download request of VOD system to the described neighbor node that connects;
The data download unit is used for according to described download request the data of acquisition point broadcast system.
10. the data download apparatus of VOD system according to claim 9 is characterized in that, described linkage unit further comprises:
Judgment sub-unit is used for according to described parameter information, judges network conditions between requesting node and the described neighbor node;
Connect and set up subelement, if it is better to be used for network condition, then described request node and described neighbor node connect;
Storing sub-units, if it is relatively poor to be used for network condition, it is standby that then the described request node is stored the parameter information of described neighbor node.
11. the data download apparatus according to claim 9 or 10 described VOD system is characterized in that, also comprises:
Close on the broadcast point data unit is set, be used to be provided with the data length that closes on broadcast point;
Judging unit is used to judge whether described data of closing on broadcast point are downloaded finishes;
The described request transmitting element is not downloaded and is finished if also be used for described data of closing on broadcast point, and then preferential the transmission closed on the data download request of broadcast point to described quite good network status neighbor node.
12. the data download apparatus of VOD system according to claim 11 is characterized in that, the described request transmitting element further comprises:
Subelement is determined in request, is used to determine close on the download request of the data slot of broadcast point; Wherein, the described data slot that closes on broadcast point is a described data part of closing on broadcast point;
Priority is provided with subelement, is used for the distance according to described data slot and broadcast point, for described download request is provided with priority;
Request sends subelement, is used for according to described priority, and described definite download request is sent to described quite good network status neighbor node.
13. the data download apparatus of VOD system according to claim 12 is characterized in that, also comprises:
Information setting unit is used to be provided with the size and the download time of the data slot that closes on broadcast point;
Reconnect the unit,, then, reselect with described neighbor node and connect, and then download described data slot according to the described parameter information that the service neighbor node is provided if it is overtime to be used for described download time;
Updating block if it is not overtime to be used for described download time, then upgrades dot matrix image information.
14. the data downloading system of a VOD system is characterized in that, comprising: requesting node, neighbor node and LIST SERVER;
Described LIST SERVER is used to obtain the parameter information of described request node and described neighbor node; According to the parameter information of described request node, inquiry can connect with this requesting node also can provide the neighbor node of required service for this node; The described neighbor node parameter information of required service that provides that transmission inquires is to the described request node;
The described request node, being used to obtain provides the neighbor node of required service parameter information; According to described parameter information, select neighbor node with quite good network status to connect; The data download request that sends VOD system is to the described neighbor node that connects; According to described download request, the data of acquisition point broadcast system;
Described neighbor node is used to receive the download request of described request node; According to the described download request that receives, issue the data of VOD system.
15. the data downloading system of VOD system according to claim 14 is characterized in that, the network schemer that described request node and described neighbor node are set up adopts the peer-to-peer network pattern; Wherein, the described request node comprises: as the data download apparatus of any described VOD system in the claim 8 to 13.
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| CN2009100835170A CN101883124B (en) | 2009-05-08 | 2009-05-08 | Data downloading method, device and system of on-demand system |
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| CN2009100835170A CN101883124B (en) | 2009-05-08 | 2009-05-08 | Data downloading method, device and system of on-demand system |
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| CN101883124A true CN101883124A (en) | 2010-11-10 |
| CN101883124B CN101883124B (en) | 2013-03-27 |
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| CN2009100835170A Expired - Fee Related CN101883124B (en) | 2009-05-08 | 2009-05-08 | Data downloading method, device and system of on-demand system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735115A (en) * | 2013-12-24 | 2015-06-24 | 乐视网信息技术（北京）股份有限公司 | P2P downloading method and device |
| CN105100956A (en) * | 2015-08-21 | 2015-11-25 | 深圳中兴网信科技有限公司 | Data acquisition method and data acquisition system |
| CN107231423A (en) * | 2017-06-07 | 2017-10-03 | 北京奇艺世纪科技有限公司 | A kind of document distribution method and system |
| CN107277013A (en) * | 2017-06-19 | 2017-10-20 | 网宿科技股份有限公司 | Live broadcast system and node administration method in peer-to-peer network |
| WO2021056314A1 (en) * | 2019-09-23 | 2021-04-01 | 中国科学院声学研究所 | System for providing exact communication delay protection of request response for distributed service |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101087403B (en) * | 2007-05-31 | 2010-10-06 | 杭州搜视网络有限公司 | Distributed stream media order system based on P2P technology and implementation method for stream media program order |
| CN101272404B (en) * | 2008-05-15 | 2011-10-19 | 中国科学院计算技术研究所 | Link selection method of P2P video living broadcast system data scheduling |
-
2009
- 2009-05-08 CN CN2009100835170A patent/CN101883124B/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735115A (en) * | 2013-12-24 | 2015-06-24 | 乐视网信息技术（北京）股份有限公司 | P2P downloading method and device |
| CN105100956A (en) * | 2015-08-21 | 2015-11-25 | 深圳中兴网信科技有限公司 | Data acquisition method and data acquisition system |
| CN107231423A (en) * | 2017-06-07 | 2017-10-03 | 北京奇艺世纪科技有限公司 | A kind of document distribution method and system |
| CN107231423B (en) * | 2017-06-07 | 2019-12-13 | 北京奇艺世纪科技有限公司 | File distribution method and system |
| CN107277013A (en) * | 2017-06-19 | 2017-10-20 | 网宿科技股份有限公司 | Live broadcast system and node administration method in peer-to-peer network |
| WO2021056314A1 (en) * | 2019-09-23 | 2021-04-01 | 中国科学院声学研究所 | System for providing exact communication delay protection of request response for distributed service |
| US12010164B2 (en) | 2019-09-23 | 2024-06-11 | Institute Of Acoustics, Chinese Academy Of Sciences | System for providing exact communication delay guarantee of request response for distributed service |
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| Publication number | Publication date |
|---|---|
| CN101883124B (en) | 2013-03-27 |
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