CN102917028B - The caching method of internet video live broadcasting and device - Google Patents
The caching method of internet video live broadcasting and device Download PDFInfo
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- CN102917028B CN102917028B CN201210363620.2A CN201210363620A CN102917028B CN 102917028 B CN102917028 B CN 102917028B CN 201210363620 A CN201210363620 A CN 201210363620A CN 102917028 B CN102917028 B CN 102917028B
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Abstract
The present invention discloses a kind of caching method of internet video live broadcasting, comprising: if the Data Source that Peer obtains comprises PA, then according to the state information of Peer, detects the data cached of Peer and whether reaches predetermined threshold value; If so, then according to data cached acquisition speed, setting time out, suspends Peer and obtains data from PA.The present invention also discloses a kind of buffer storage of internet video live broadcasting.When the present invention comprises PA by the Data Source obtained at Peer, according to the state information of Peer, if detect the data cached of Peer whether reach predetermined threshold value, then suspend Peer obtains data method from PA, there is the beneficial effect reducing direct broadcast server pressure, improve the stability of caching server operation and the reliability of service function.<!--1-->
Description
Technical field
The present invention relates to Internet video streaming media transmission technique field, particularly relate to a kind of caching method and device of internet video live broadcasting.
Background technology
P2P (PeertoPeernetwork, peer-to-peer network) be the mainstream network technology of current application in streaming media field, relative to traditional C/S (Client/Server, client/server) technology, the maximum feature of P2P technology is can direct communication and simultaneously have the function of server and client side between each node, also there is the function of route and high-speed cache, not single Dependency Set Chinese style server node.Due to above-mentioned functions feature, P2P network technology is widely used in network flow-medium system.
In the P2P network direct broadcasting system of prior art, the strategy often ignored node obtains data from caching server is considered.Although the pressure of caching server in P2P network schemer, compares and greatly reduce under traditional C/S model, caching server still will in the face of obtaining new data and the immense pressure of distributing data P2P network in time in real time from outside; Especially, when new video stream data has just arrived caching server, the node now in P2P network is this new data flow not; If the strategy that in P2P network, neither one is good processes this situation, beginning is all obtained new data from caching server by so all nodes, the pressure of server can suddenly increase, thus the negative effect such as the link congestion causing linking with server, message transmission rate reduce, the increase of data packetloss rate.
Summary of the invention
Main purpose of the present invention is to provide a kind of caching method and device of internet video live broadcasting, is intended to the series of problems that solution internet video live broadcasting server brings because of buffer memory pressure.
The invention discloses a kind of caching method of internet video live broadcasting, comprise the following steps:
If the Data Source that the current Peer node of step S01 obtains comprises caching server node PA, then according to the state information of described Peer node, detect the data cached of described Peer node and whether reach predetermined threshold value;
Step S02, when described Peer node data cached reaches predetermined threshold value, according to described data cached acquisition speed, setting time out, suspends described Peer node and obtains data from described PA node.
Preferably, described step S02 specifically comprises:
Data cached according to described Peer node, obtains the reproduction time that described data cached support Peer node player continues to play;
According to described reproduction time and data cached acquisition speed, set described Peer node and suspend the time out obtaining data from described PA node.
Preferably, also step is comprised after described step S02:
Step S03, after described time out reaches, described Peer node continues to obtain data.
Preferably, described step S03 specifically comprises:
After described time out reaches, described Peer node obtains the state information of all nodes self be connected with described Peer node in current P2P network;
Judge whether peer node PO can meet the broadcast request of described Peer node player;
If so, then Peer node stops obtaining data from described PA node;
If not, then according to the Data Source that described Peer node obtains, corresponding operating is carried out.
Preferably, in described step S03 after described time out reaches, trigger the state information that described Peer node obtains all nodes self be connected with described Peer node in current P2P network at once; But before time-out, described Peer node periodically obtains the state information of all nodes self be connected with described Peer node in current P2P network according to preset time interval.
The present invention also discloses a kind of buffer storage of internet video live broadcasting, comprising:
Data detection module, when the Data Source for obtaining at Peer node comprises caching server node PA, according to the state information of described Peer node, detecting the data cached of described Peer node and whether reaching predetermined threshold value;
Data cache module, for when described Peer node data cached reaches predetermined threshold value, according to described data cached acquisition speed, setting time out, suspends described Peer node and obtains data from described PA node.
Preferably, described data cache module specifically for:
Data cached according to described Peer node, obtains the reproduction time that described data cached support Peer node player continues to play;
According to described reproduction time and data cached acquisition speed, set described Peer node and suspend the time out obtaining data from described PA node.
Preferably, the buffer storage of described internet video live broadcasting, also comprises:
Data acquisition module, for after described time out reaches, described Peer node continues to obtain data.
Preferably, described data acquisition module specifically comprises:
State information acquisition unit, for after described time out reaches, described Peer node obtains the state information of all nodes self be connected with described Peer node in current P2P network;
Data Source recognition unit, for judging whether PO node can meet the broadcast request of described Peer node player; If so, then Peer node stops obtaining data from described PA node; If not, then according to the Data Source that described Peer node obtains, corresponding operating is carried out.
Preferably, described state information acquisition unit, after described time out reaches, triggers the state information that described Peer node obtains all nodes self be connected with described Peer node in current P2P network at once; But before time-out, described Peer node periodically obtains the state information of all nodes self be connected with described Peer node in current P2P network according to preset time interval.
When the present invention comprises PA node by the Data Source obtained at Peer node, according to the state information of Peer node, if detect the data cached of Peer node whether reach predetermined threshold value, then according to data cached acquisition speed, setting time out, suspend Peer node obtains data method from PA node, there is the beneficial effect reducing direct broadcast server pressure, improve the stability of caching server operation and the reliability of service function.
Accompanying drawing explanation
Fig. 1 is P2P network peer node one application scenarios schematic diagram of the present invention;
Fig. 2 is the caching method first embodiment schematic flow sheet of internet video live broadcasting of the present invention;
Fig. 3 is the caching method second embodiment schematic flow sheet of internet video live broadcasting of the present invention;
Fig. 4 is the buffer storage first example structure schematic diagram of internet video live broadcasting of the present invention;
Fig. 5 is the buffer storage second example structure schematic diagram of internet video live broadcasting of the present invention;
Fig. 6 is data acquisition module one example structure schematic diagram in the buffer storage of internet video live broadcasting of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Embodiment
Technical scheme of the present invention is further illustrated below in conjunction with Figure of description and specific embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Reference Fig. 1, Fig. 1 are P2P network peer node one application scenarios schematic diagrames of the present invention; As shown in Figure 1, in the embodiment of the present invention, three classes are divided into all peer node in network:
Present node shown in Peer: Fig. 1, obtains data from other peer node P2P network;
PA: caching server node, as the Acc node in Fig. 1, PA node has for whole P2P Network Capture external resource and the function accelerating data acquisition speed between node;
PO: removing PA node, the general name of other nodes be connected with described Peer node.
The description that the specific embodiment of the invention will directly adopt above-mentioned node to carry out embodiment, to the specific descriptions of above-mentioned node, follow-uply will to repeat no more.
With reference to the caching method first embodiment schematic flow sheet that Fig. 2, Fig. 2 are internet video live broadcastings of the present invention; As shown in Figure 2, the caching method of internet video live broadcasting of the present invention specifically comprises the following steps:
If the Data Source that step S01 Peer node obtains comprises PA node, then according to the state information of Peer node, detect the data cached of Peer node and whether reach predetermined threshold value;
Judge that Peer node obtains the source of data.If Data Source only has PO node, then continue Gains resources; If Data Source comprises PA node, then according to the state information of described Peer node, detect the data buffer area of this Peer node, and judge the data cached threshold value whether reaching setting of Peer node, as the data cache thresholds in Fig. 1.In a preferred embodiment, in P2P network, described Peer node periodically obtains the state information of each node be connected with described Peer node according to preset time interval.
Step S02, when described Peer node data cached reaches predetermined threshold value, according to described data cached acquisition speed, setting time out, suspends described Peer node and obtains data from described PA node.
If the data cached threshold value reaching setting of Peer node, then this data cached can support player continue play a period of time; Data cached according to this, calculate this data cached can support player continue play reproduction time T:
T＝M/bps；(1)
Wherein, M is the size of data of Peer nodal cache, and bps is encoding rate.
According to the acquisition speed of above-mentioned reproduction time T and Peer nodal cache data, random setting Peer node suspends the time out T1 obtaining data from PA node, is completed by the timer of Peer node the timing of this time out T1.The span of this time out T1 is [T
min, T
max], wherein, maximum time out T
maxthe data cached time that can play can not be greater than, T
minartificially set according to system condition, T
maxcomputational methods be:
T
max＝min{T
min+T×(1-λ),T}；(2)
Wherein, T is calculated by formula (1), and λ is obtained by following formula:
Wherein, M
tfor the data volume in the t time required for video normal play, Width is the bandwidth of Peer node, and this bandwidth is the data volume that in the unit time, Peer node obtains.
Above-mentioned formula (1) is network computing formula under normal circumstances to formula (3), if when current network conditions is good, buffer memory rate is fast, then node time out just can be slightly long.
Before Peer node time-out obtains data from PA node, the correlation module of Peer node self periodically detected all node states self be connected with Peer node in network according to the preset time interval, and obtain the state information of each node above-mentioned, and after Peer node time-out terminated from the time of PA node acquisition data, trigger the current state information that Peer node obtains above-mentioned node at once.
When the present invention comprises PA node by the Data Source obtained at Peer node, according to the state information of Peer node, if detect the data cached of Peer node whether reach predetermined threshold value, then according to data cached acquisition speed, setting time out, suspend Peer node obtains data method from PA node, there is the beneficial effect reducing direct broadcast server pressure.
With reference to the caching method second embodiment schematic flow sheet that Fig. 3, Fig. 3 are internet video live broadcastings of the present invention; The difference of caching method first embodiment of the present embodiment and internet video live broadcasting of the present invention increase only step S03; The present embodiment is only described specifically step S03, and other steps involved by the caching method of internet video live broadcasting of the present invention please refer to the specific descriptions of related embodiment, do not repeat them here.
As shown in Figure 3, the caching method of internet video live broadcasting of the present invention, also comprises step after step S02:
Step S03, after described time out reaches, described Peer node continues to obtain data.
After the timer of Peer node reaches the time out of above-mentioned setting, trigger the current state information that Peer node obtains each peer node in current P2P network at once, and according to the described state information identification data source obtained, obtain corresponding related data.Particularly, after Peer node obtains the state information of each peer node in current P2P network, judge whether PO node can meet the broadcast request of Peer node player; If can meet, then Peer node stops obtaining data from PA node, reduces PA node pressure; If PO node can not meet the broadcast request of Peer node player, then continue source PA node being obtained data as Peer node, repeat the step S01 to S02 in above-described embodiment.
The present embodiment is by after time out reaches, and Peer node continues the method obtaining data, has the beneficial effect improving the stability of caching server operation and the reliability of service function.
With reference to the buffer storage first example structure schematic diagram that Fig. 4, Fig. 4 are internet video live broadcastings of the present invention; As shown in Figure 4, the buffer storage of internet video live broadcasting of the present invention comprises:
Data detection module 01, when the Data Source for obtaining at Peer node comprises PA node, according to the state information of described Peer node, detecting the data cached of described Peer node and whether reaching predetermined threshold value;
Data detection module 01 judges that Peer node obtains the source of data.If Data Source only has PO node, then data detection module 01 continues Gains resources; If Data Source comprises PA node, then data detection module 01 is according to the state information of described Peer node, detects the data buffer area of this Peer node, and judges the data cached threshold value whether reaching setting of Peer node, as the data cache thresholds in Fig. 1.In a preferred embodiment, in P2P network, described Peer node periodically obtains the state information of each node be connected with described Peer node according to preset time interval.
Data cache module 02, for when described Peer node data cached reaches predetermined threshold value, according to described data cached acquisition speed, setting time out, suspends described Peer node and obtains data from described PA node.
If data detection module 01 judges the data cached threshold value reaching setting of Peer node, this is data cached can support that player continues to play a period of time; Data cache module 02 is data cached according to this, calculate this data cached can support player continue play reproduction time T:
T＝M/bps；(1)
Wherein, M is the size of data of Peer nodal cache, and bps is encoding rate.
Data cache module 02 is according to the acquisition speed of above-mentioned reproduction time T and Peer nodal cache data, and random setting Peer node suspends the time out T1 obtaining data from PA node, is completed by the timer of Peer node the timing of this time out T1.The span of this time out T1 is [T
min, T
max], wherein, maximum time out T
maxthe data cached time that can play can not be greater than, T
minartificially set according to system condition, T
maxcomputational methods be:
T
max＝min{T
min+T×(1-λ),T}；(2)
Wherein, T is calculated by formula (1), and λ is obtained by following formula:
Wherein, M
tfor the data volume in the t time required for video normal play, Width is the bandwidth of Peer node, and this bandwidth is the data volume that in the unit time, Peer node obtains.
Above-mentioned formula (1) is network computing formula under normal circumstances to formula (3), if when current network conditions is good, buffer memory rate is fast, then node time out just can be slightly long.
When the present invention comprises PA node by the Data Source obtained at Peer node, according to the state information of Peer node, if detect the data cached of Peer node whether reach predetermined threshold value, then according to data cached acquisition speed, setting time out, suspend Peer node and obtain data from PA node, there is the beneficial effect reducing direct broadcast server pressure.
With reference to the buffer storage second example structure schematic diagram that Fig. 5, Fig. 5 are internet video live broadcastings of the present invention; The difference of buffer storage first embodiment of the present embodiment and internet video live broadcasting of the present invention increase only data acquisition module 03; The present embodiment is only described specifically data acquisition module 03, and other modules involved by the buffer storage of internet video live broadcasting of the present invention please refer to the specific descriptions of related embodiment, do not repeat them here.
As shown in Figure 5, the buffer storage of internet video live broadcasting of the present invention also comprises:
Data acquisition module 03, for after described time out reaches, described Peer node continues to obtain data.
Reference Fig. 6, Fig. 6 are data acquisition module one example structure schematic diagrames in the buffer storage of internet video live broadcasting of the present invention.As shown in Figure 6, in the buffer storage of internet video live broadcasting of the present invention, data acquisition module 03 specifically comprises:
State information acquisition unit 031, for after described time out reaches, described Peer node obtains the state information of all nodes self be connected with described Peer node in current P2P network;
Data Source recognition unit 032, for judging whether PO node can meet the broadcast request of described Peer node player; If so, then Peer node stops obtaining data from described PA node; If not, then according to the Data Source that described Peer node obtains, corresponding operating is carried out.
Particularly, after state information acquisition unit 031 learns that the timer of Peer node reaches the time out of above-mentioned setting, state information acquisition unit 031 triggers the state information that Peer node obtains each peer node in current P2P network at once; Data Source recognition unit 032 judges whether PO node can meet the broadcast request of Peer node player; If can meet, then Data Source recognition unit 032 control Peer node stops obtaining data from PA node, reduces PA node pressure; If PO node can not meet the broadcast request of Peer node player, then Data Source recognition unit 032 continues source PA node being obtained data as Peer node, obtains the related data of this PA node for Peer node.
In a preferred embodiment, data acquisition module 03 is after described time out reaches, trigger the current state information that described Peer node obtains each node self be connected with Peer node in network at once, and according to described state information identification data source, continue to obtain corresponding related data.
The present embodiment is by after time out reaches, and Peer node continues to obtain data, has the beneficial effect improving the stability of caching server operation and the reliability of service function.
The foregoing is only the preferred embodiments of the present invention; not thereby its scope of the claims is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; directly or indirectly be used in the technical field that other are relevant, be all in like manner included in scope of patent protection of the present invention.
Claims (8)
1. a caching method for internet video live broadcasting, is characterized in that, comprises the following steps:
If the Data Source that the current Peer node of step S01 obtains comprises caching server node PA, then according to the state information of described Peer node, detect the data cached of described Peer node and whether reach predetermined threshold value;
Step S02, when described Peer node data cached reaches predetermined threshold value, according to described data cached acquisition speed, setting time out, suspends described Peer node and obtains data from described PA node;
Described step S02 specifically comprises:
Data cached according to described Peer node, obtain the reproduction time T that described data cached support Peer node player continues to play, this reproduction time T=M/bps, wherein, M is the size of data of Peer nodal cache, and bps is encoding rate;
According to described reproduction time and data cached acquisition speed, set described Peer node and suspend the time out T1 obtaining data from described PA node, the span of this time out T1 is [T
min, T
max], maximum time out T
max=min{T
min+ T × (1-λ), T}, wherein, T
minaccording to system condition setting,
Wherein, M
tfor the data volume in the t time required for video normal play, Width is the bandwidth of Peer node, and this bandwidth is the data volume that in the unit time, Peer node obtains.
2. the method for claim 1, is characterized in that, also comprises step after described step S02:
Step S03, after described time out reaches, described Peer node continues to obtain data.
3. method as claimed in claim 2, it is characterized in that, described step S03 specifically comprises:
After described time out reaches, described Peer node obtains the state information of all nodes self be connected with described Peer node in current P2P network;
Judge whether peer node PO can meet the broadcast request of described Peer node player; Wherein, PO node is removing PA node, the general name of other nodes be connected with described Peer node;
If so, then Peer node stops obtaining data from described PA node;
If not, then according to the Data Source that described Peer node obtains, corresponding operating is carried out.
4. method as claimed in claim 3, is characterized in that, in described step S03 after described time out reaches, trigger the state information that described Peer node obtains all nodes self be connected with described Peer node in current P2P network at once; But before time-out, described Peer node periodically obtains the state information of all nodes self be connected with described Peer node in current P2P network according to preset time interval.
5. a buffer storage for internet video live broadcasting, is characterized in that, comprising:
Data detection module, when the Data Source for obtaining at Peer node comprises caching server node PA, according to the state information of described Peer node, detecting the data cached of described Peer node and whether reaching predetermined threshold value;
Data cache module, for when described Peer node data cached reaches predetermined threshold value, according to described data cached acquisition speed, setting time out, suspends described Peer node and obtains data from described PA node;
Described data cache module specifically for:
Data cached according to described Peer node, obtain the reproduction time T that described data cached support Peer node player continues to play, this reproduction time T=M/bps, wherein, M is the size of data of Peer nodal cache, and bps is encoding rate;
According to described reproduction time and data cached acquisition speed, set described Peer node and suspend the time out T1 obtaining data from described PA node, the span of this time out T1 is [T
min, T
max], maximum time out T
max=min{T
min+ T × (1-λ), T}, wherein, T
minaccording to system condition setting,
Wherein, M
tfor the data volume in the t time required for video normal play, Width is the bandwidth of Peer node, and this bandwidth is the data volume that in the unit time, Peer node obtains.
6. device as claimed in claim 5, is characterized in that, also comprise:
Data acquisition module, for after described time out reaches, described Peer node continues to obtain data.
7. device as claimed in claim 6, it is characterized in that, described data acquisition module specifically comprises:
State information acquisition unit, for after described time out reaches, described Peer node obtains the state information of all nodes self be connected with described Peer node in current P2P network;
Data Source recognition unit, for judging whether PO node can meet the broadcast request of described Peer node player; Wherein, PO node is removing PA node, the general name of other nodes be connected with described Peer node; If so, then Peer node stops obtaining data from described PA node; If not, then according to the Data Source that described Peer node obtains, corresponding operating is carried out.
8. device as claimed in claim 7, it is characterized in that, described state information acquisition unit, after described time out reaches, triggers the state information that described Peer node obtains all nodes self be connected with described Peer node in current P2P network at once; But before time-out, described Peer node periodically obtains the state information of all nodes self be connected with described Peer node in current P2P network according to preset time interval.
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| CN104159125A (en) * | 2014-07-22 | 2014-11-19 | 乐视网信息技术（北京）股份有限公司 | Video display method, virtual player and video player |
| CN107920258B (en) * | 2016-10-11 | 2020-09-08 | 中国移动通信有限公司研究院 | Data processing method and device |
| CN107277013B (en) * | 2017-06-19 | 2020-05-22 | 网宿科技股份有限公司 | Live broadcast system in peer-to-peer network and node management method |
| CN110740146B (en) * | 2018-07-18 | 2020-06-26 | 贵州白山云科技股份有限公司 | Method and device for scheduling cache nodes and computer network system |
| CN111479160B (en) | 2019-01-23 | 2023-02-21 | 上海哔哩哔哩科技有限公司 | Web video intelligent buffering method and device based on browser and storage medium |
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| CN101465785A (en) * | 2008-05-28 | 2009-06-24 | 北京东方网信科技有限公司 | P2P flux caching system based on active guide and redirection |
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