WO2016184230A1

WO2016184230A1 - P2p data downloading method and apparatus

Info

Publication number: WO2016184230A1
Application number: PCT/CN2016/076065
Authority: WO
Inventors: 李卓; 魏帆
Original assignee: 乐视云计算有限公司
Priority date: 2015-05-15
Filing date: 2016-03-10
Publication date: 2016-11-24
Also published as: CN105721889A

Abstract

Provided are a P2P data downloading method and apparatus, which belong to the technical field of computer communications. The method comprises: acquiring an initial CDN downloading probability, an initial network condition parameter and a current network condition parameter, wherein the initial CDN downloading probability indicates an initially set probability that video data in a data block of a P2P downloading region is chosen to be downloaded from a CDN server; comparing the current network condition parameter with the initial network condition parameter, and updating the initial CDN downloading probability to obtain a current CDN downloading probability according to a comparison result; and choosing to download the video data in the data block of the P2P downloading region from the CDN server according to the current CDN downloading probability. The apparatus comprises: an acquiring module, a processing module and a downloading module. P2P data may be better shared, and further improvement of a P2P downloading rate may be realized.

Description

Method and device for downloading P2P data

Technical field

The present invention relates to computer communication technologies, and in particular, to a method and apparatus for P2P data downloading.

Background technique

With the development of computer communication technology, more and more users watch videos online through computers. When watching a video online, the client player downloads video data from a CDN (Content Delivery Network) server via the http (HyperText Transfer Protocol) protocol for online playback. In order to improve the download speed of the video data and reduce the access pressure and bandwidth of the client player to the CDN server, the client player adopts a P2P (peer-to-peer) download function (ie, the client player). Sharing data with other client players, the client player can download video data that is not in the client player from other client players, and other client players can download other clients from the client player. Video data not available in the player). The current P2P data downloading method is as follows: Referring to FIG. 1, the emergency zone and the P2P download zone are sequentially set in the positive direction of the playback point of the client player, wherein the video data of the emergency zone is to be played by the client player. Video data, so the video data in the emergency area is mainly downloaded directly from the CDN server. The video data in the P2P download area is mainly downloaded from other client players. Each square in the emergency area and the P2P download area represents a data block. The data block is the basic data unit for video playback, http download, P2P download and sharing. However, due to the live broadcast status, the playback progress of all client players is basically at the same time point, and the progress of downloading video data between each client player is basically the same as that of the video data owned (ie, I have The video data is also available to others, and I don't have any video data.) This situation will result in no P2P sharing data between the client players. Finally, the client player data must be downloaded from the CDN server. P2P The role is greatly limited.

In order to solve the above problems in the live broadcast state, for the live broadcast state, the current P2P data download method is specifically as follows: when setting the P2P download area, each data block in the P2P download area is once selected with a probability of n%, and selected. Video data in the data block from the CDN server Load, this will make the difference between the video player data generated by each client player (that is, I have no video data others, others have video data I did not), so that in the live state, each client player Have the opportunity to share data.

However, in actual applications, the network bandwidth of each client player is different, and the rate of downloading video data from the CDN server is also different. If each client player has a fixed value of n%, the network bandwidth is small. The low-speed client player takes a long time to download the video data from the CDN server, which affects the P2P sharing data; and regardless of the total number of client players that are simultaneously broadcasted, each client player is selected. A fixed value of n% is likely to cause excessive video data to be downloaded from the CDN server, which hinders further improvement of the P2P download rate. For example, the selection probability is set to 20%, and when there are more client players watching the same live program. If it reaches 10,000, in theory, the selection probability of each client player only needs to be 0.01%. By P2P sharing data, each client player can obtain all the video data needed for the live program, if the probability is selected. Fixed at 20%, inevitably caused too much video data to be downloaded from the CDN server.

Summary of the invention

In order to solve the problems of the prior art, the present invention provides a P2P data downloading method and device, which can balance different network bandwidth network speed client players, can better perform P2P sharing data; and can realize P2P download rate. Further improvement.

In order to solve the problems of the prior art, the present invention discloses a method for P2P data downloading, the method comprising:

Obtaining an initial CDN download probability, an initial network status parameter, and a current network status parameter; wherein the initial CDN download probability indicates a probability that video data in the initially set data block in the P2P download area is selected to be downloaded from the CDN server;

Comparing the current network status parameter with the initial network status parameter, and updating the initial CDN download probability according to the comparison result to obtain a current CDN download probability;

And selecting video data in the data block in the P2P download area to be downloaded from the CDN server according to the current CDN download probability.

Further, the current network status parameter includes a current P2P upload rate and current P2P traffic. Ratio and current P2P upload volume; get current network status parameters, including:

Counting the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the preset time interval;

And calculating the current P2P upload rate and the current P2P traffic ratio according to the current P2P download amount, the current P2P upload amount, and the current CDN download amount.

Further, the initial network condition parameter includes an initial P2P upload rate, an initial P2P traffic ratio, and a CDN prefetch data amount, and the CDN prefetch data amount is according to the current P2P download amount, the current CDN download amount, and the The initial CDN download probability is obtained; obtaining the initial CDN download probability and the initial network condition parameter includes: obtaining an initial CDN download probability returned by the play server, and initializing the initial P2P upload rate, the initial P2P traffic ratio, and the CDN download probability update ratio.

Comparing the current network status parameter with the initial network status parameter, and updating the initial CDN download probability according to the comparison result to obtain a current CDN download probability, including:

And if the current P2P upload rate is greater than the initial P2P upload rate, the current P2P traffic ratio is greater than or equal to the initial P2P traffic ratio, and the current P2P upload amount is greater than or equal to the CDN prefetched data amount, The initial CDN download probability is increased according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic ratio as the initial P2P traffic;

Recalculating the current P2P upload rate and the current P2P traffic, if the current P2P upload rate is less than a preset ratio of the initial P2P upload rate, or the current P2P upload amount is less than the CDN prefetch data amount. And the current P2P upload amount, re-acquiring the initial CDN download probability, and initializing the initial network status parameter, and initializing the CDN download probability update ratio to a preset value;

If the current P2P upload rate is smaller than the initial P2P upload rate and greater than a preset ratio of the initial P2P upload rate, the initial CDN download probability is reduced according to the CDN download probability update ratio, and the obtained The current CDN download probability is described, and the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic ratio is used as the initial P2P traffic.

Further, the CDN download probability update ratio is preset, or in the current P2P When the upload rate is less than the initial P2P upload rate and greater than the preset ratio of the initial P2P upload rate, it is obtained according to a preset ratio reduction. Further, the initial CDN download probability is preset and is less than or equal to 50%.

Specifically, the current P2P download quantity, the current P2P upload quantity, and the current CDN download quantity in the preset preset time interval include the following steps:

B1: when the P2P engine successfully establishes a connection with the play server and determines that the p2p data interaction can be performed, the time is counted by the first timer and the second timer;

B2: when the statistical time of the first timer reaches the first preset time interval, determining whether to end the statistics of the first timer by using a preset statistical end probability, and if it is determined to end the statistics of the first timer, Execute b6; otherwise, execute b3;

B3: determining whether the time of the second timer is greater than or equal to a second preset time interval, if greater than or equal to the second preset time interval, executing b5; otherwise, executing b4;

B4: clear the statistical time of the first timer, the first timer restarts the statistical time, and then executes b2;

B5: the second timer ends the statistics, and then executes b6;

B6: Calculate the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the statistical time of the second timer.

Specifically, after the video data in the data block in the P2P download area is downloaded from the CDN server, the method further includes:

The current CDN download probability is used as an initial CDN download probability and the current network status parameter as an initial network status parameter.

In order to solve the problems of the prior art, the present invention also discloses an apparatus for downloading P2P data, the apparatus comprising:

An obtaining module, configured to obtain an initial CDN download probability, an initial network status parameter, and a current network status parameter; wherein the initial CDN download probability indicates that video data in a data block in an initially set P2P download area is selected from a CDN server The probability of downloading;

a processing module, configured to perform the current network status parameter and the initial network status parameter Comparing, according to the comparison result, updating the initial CDN download probability to obtain a current CDN download probability;

And a downloading module, configured to select video data in the data block in the P2P download area to be downloaded from the CDN server according to the current CDN download probability.

Further, the current network status parameter includes a current P2P upload rate, a current P2P traffic ratio, and a current P2P upload amount; the obtaining module further includes: a statistics unit and a calculating unit;

The statistics unit is configured to count the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the preset time interval;

The calculating unit is configured to calculate the current P2P upload rate and the current P2P traffic ratio according to the current P2P download amount, the current P2P upload amount, and the current CDN download amount.

The processing module further includes: a probability adjustment unit,

The probability adjustment unit is configured to: if the current P2P upload rate is greater than the initial P2P upload rate, the current P2P traffic ratio is greater than or equal to the initial P2P traffic ratio, and the current P2P upload amount is greater than or equal to the CDN pre- Taking the amount of data, the initial CDN download probability is increased according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P upload rate is used as the initial P2P upload rate. Describe the current P2P traffic ratio as the initial P2P traffic;

The probability adjustment unit is further configured to re-acquire the initial if the current P2P upload rate is less than a preset ratio of the initial P2P upload rate, or the current P2P upload amount is less than the CDN prefetch data amount. The CDN downloads the probability, and initializes the initial network condition parameter, and initializes the CDN download probability update ratio to a preset value;

The probability adjustment unit is further configured to: if the current P2P upload rate is smaller than the initial P2P If the upload rate is greater than the preset ratio of the initial P2P upload rate, the initial CDN download probability is reduced according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P is obtained. The upload rate is used as the initial P2P upload rate and the current P2P traffic ratio as the initial P2P traffic.

Further, the statistics unit is further configured to perform the following steps:

B5: the second timer ends the statistics, and then executes b6;

Further, the CDN download probability update ratio is preset, or is decreased according to a preset ratio when the current P2P upload rate is smaller than the initial P2P upload rate and greater than a preset ratio of the initial P2P upload rate. obtain.

Further, the initial CDN download probability is preset and is less than or equal to 50%.

Further, the acquiring module is configured to: after the downloading module selects video data in the data block in the P2P download area to be downloaded from the CDN server, use the current CDN download probability as an initial CDN download probability, The current network status parameter is used as an initial network status parameter.

The method and device for downloading P2P data provided by the invention: setting the CDN download probability according to the network condition, so that the client player with high network bandwidth and high network speed has a greater chance to download more video data from the CDN server, and the network bandwidth is small. The low-speed client player downloads very little video data from the CDN server, and can balance different network bandwidth speeds of the client player, which can better enter The P2P shares data; and the CDN download probability of different client players is dynamically changed according to the previous CDN download probability, and it is not easy to cause excessive video data to be downloaded from the CDN server, and the P2P download rate can be further improved.

DRAWINGS

1 is a flow chart of an embodiment of a method for downloading P2P data according to the present invention;

2 is a flow chart of another embodiment of a method for downloading P2P data according to the present invention;

3 is a flow chart of still another embodiment of a method for downloading P2P data according to the present invention;

4 is a flow chart of still another embodiment of a method for downloading P2P data according to the present invention;

FIG. 5 is a flowchart of still another embodiment of a method for downloading P2P data according to the present invention; FIG.

FIG. 6 is a schematic structural diagram of an embodiment of a device for downloading P2P data according to the present invention.

detailed description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, in which the present invention can be fully understood and implemented by the technical means of solving the technical problems and achieving the technical effects.

Certain terms are used throughout the description and claims to refer to particular components. Those skilled in the art will appreciate that hardware manufacturers may refer to the same component by different nouns. The present specification and the claims do not use the difference in the name as the means for distinguishing the components, but the difference in function of the components as the criterion for distinguishing. The word "comprising" as used throughout the specification and claims is an open term and should be interpreted as "including but not limited to". "Substantially" means that within the range of acceptable errors, those skilled in the art will be able to solve the technical problems within a certain error range, substantially achieving the technical effects. In addition, the term "coupled" is used herein to include any direct and indirect electrical coupling means. Therefore, if a first device is coupled to a second device, the first device can be directly electrically coupled to the second device, or electrically coupled indirectly through other devices or coupling means. Connected to the second device. The description of the present invention is intended to be illustrative of the preferred embodiments of the invention. The scope of the invention is defined by the appended claims.

It should also be noted that the terms "including", "comprising" or "comprising" or any other variations thereof are intended to encompass a non-exclusive inclusion, such that the item or system comprising a plurality of elements includes not only those elements but also Other elements, or elements that are inherent to such goods or systems. An element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the item or system including the element, without further limitation.

Embodiment 1

FIG. 1 is a schematic diagram of a P2P data downloading method according to Embodiment 1 of the present invention; as shown in FIG. 1 , it may specifically include:

S101: Acquire initial CDN download probability, initial network status parameter, and current network status parameter; wherein, the initial CDN download probability indicates a probability that video data in the initially set data block in the P2P download area is selected to be downloaded from the CDN server.

The initial network condition parameter may include an initial P2P upload rate, an initial P2P traffic ratio, and a CDN prefetch data amount. The current network status parameter may include a current P2P upload rate, a current P2P traffic ratio, and a current P2P upload amount.

S102: Compare the current network status parameter with the initial network status parameter, and update the initial CDN download probability according to the comparison result to obtain a current CDN download probability.

Specifically, by comparing the current network condition parameter with the initial network condition parameter, according to the comparison result, it can be known whether the current network condition is better than the initial network condition, and if the current network condition is better than the initial network condition, the initial CDN download probability can be improved. Obtaining the current CDN download probability, increasing the probability that the video data in the data block in the P2P download area is downloaded from the CDN server. If the current network condition is worse than the initial network condition, the initial CDN download probability can be reduced to obtain the current CDN download probability, and the probability is reduced. The probability that the video data in the data block in the P2P download area is downloaded from the CDN server, so that the network player with good network status can download more video data from the CDN server and share it to the client with poor network status. The player is used.

S103: Select video data in the data block in the P2P download area to be downloaded from the CDN server according to the current CDN download probability.

Specifically, the current CDN download probability in this embodiment is performed on the initial CDN download probability. The update obtained, that is, the CDN download probability in this embodiment is not fixed, but is changed in real time according to the current network condition.

The P2P data downloading method described in this embodiment sets the CDN download probability according to the network condition, so that the client player with high network bandwidth and high network speed has a greater chance to download more video data from the CDN server, and the network bandwidth is small. The low-speed client player downloads very little video data from the CDN server, can balance different network bandwidth network speed client players, can better P2P share data; and, different client player CDN The download probability is dynamically changed according to the previous CDN download probability, and it is not easy to cause excessive video data to be downloaded from the CDN server, and the P2P download rate can be further improved.

Embodiment 2

In a preferred embodiment of the present invention, the initial network condition parameter includes an initial P2P upload rate, an initial P2P traffic ratio, and a CDN prefetch data amount; the current network status parameter includes a current P2P upload rate, a current P2P traffic ratio, and a current P2P upload. See Figure 2, S101 obtains the initial CDN download probability, initial network status parameters, and current network status parameters, including:

S101a: Acquire an initial CDN download probability returned by the playback server, and initialize an initial P2P upload rate, an initial P2P traffic ratio, and a CDN download probability update ratio.

Specifically, the play server may set an initial CDN download probability. After the client player is initially started, the initial CDN download probability may be obtained from the play server, and the video in a data block in the P2P download area is first selected by using the initial CDN download probability. Whether the data is downloaded from the CDN server. The value of the initial CDN downloading probability can be set according to the actual application status, for example, it can be set to 10%, 15%, etc., which is not specifically limited.

Specifically, the P2P traffic ratio is: (P2P traffic/video traffic)%, wherein the P2P traffic represents the sum of the P2P download amount and the P2P upload amount in a certain period of time, and the video traffic indicates the CDN download amount and the P2P download amount in a certain period of time. Sum. The P2P upload rate is (P2P upload amount/video traffic)%.

Specifically, the initial P2P upload rate, the initial P2P traffic ratio, and the CDN download probability update ratio are initialized, and the initial P2P upload rate, the initial P2P traffic ratio, and the CDN download probability update ratio are set to initial values, an initial P2P upload rate, and an initial. P2P traffic ratio and CDN download probability The initial value of the update ratio may be set according to the actual application status. In this embodiment, the initial value of the initial P2P upload rate and the initial P2P traffic ratio is set to 0, and the initial value of the CDN download probability update ratio is set to 5%.

S101b: Statistics the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the preset time interval.

The preset time interval may be set according to actual application conditions, such as setting to 90 seconds, 100 seconds, 270 seconds, and the like. Moreover, the preset time interval can be set not only as a fixed interval but also as a changeable one.

Specifically, the statistics are started when the P2P engine successfully establishes a connection with the play server and determines that the p2p data interaction can be performed. Referring to FIG. 3, the current P2P download amount, the current P2P upload amount, and the current CDN download in the preset time interval are counted in this embodiment. The method of quantity is as follows:

B1: When the P2P engine successfully establishes a connection with the play server and determines that p2p data interaction can be performed, the time is counted by the first timer and the second timer.

In this embodiment, the first preset time interval and the second preset time interval are set, and the second preset time interval is greater than the first preset time interval. After the first preset time interval is reached, the current P2P download amount, the current P2P upload amount, and the current CDN download amount are not necessarily calculated. After the second preset time interval is reached, the current P2P download amount and the current P2P upload must be calculated. Volume and current CDN downloads. In order to facilitate the recording to compare different time intervals, the first timer and the second timer are set to start timing at the same time.

B2: When the statistics time of the first timer reaches the first preset time interval, determine whether to end the statistics of the first timer by using a preset statistical end probability, and if it is determined to end the statistics of the first timer, execute b6; otherwise , execute b3.

Specifically, the first preset time interval may be set according to an actual application condition, which is not limited thereto, and is set to 90 seconds in this embodiment.

Specifically, the preset statistical end probability is used to determine whether to end the statistics of the first timer. The preset statistical end probability may be set according to the actual application status, which is not limited, and is set to 50% in this embodiment.

B3: determining whether the time of the second timer is greater than or equal to the second preset time interval, if greater than Equal to the second preset time interval, then b5 is performed; otherwise, b4 is executed.

Specifically, the second preset time interval is greater than the first preset time interval, and the second preset time interval may be set according to the actual application condition, which is not limited thereto, and is set to 270 seconds in this embodiment.

B4: The statistical time of the first timer is cleared, the first timer restarts the counting time, and then b2 is executed.

B5: The second timer ends the statistics, and then b6 is executed.

S101c: Calculate the current P2P upload rate and the current P2P traffic ratio according to the current P2P download amount, the current P2P upload amount, and the current CDN download amount.

Specifically, the P2P traffic ratio is: (P2P traffic/video traffic)%, wherein the P2P traffic represents the sum of the P2P download amount and the P2P upload amount in a certain period of time, and the video traffic indicates the CDN download amount and the P2P download amount in a certain period of time. Sum. Therefore, the current P2P download amount and the current P2P upload amount are summed to obtain the current P2P traffic, the current P2P download amount and the current CDN download amount are summed to obtain the current video traffic, and the current P2P traffic ratio is obtained through the current P2P traffic and the current video traffic. The current P2P traffic is summed to obtain the current P2P traffic, and the current P2P traffic and the current CDN download are summed to obtain the current video traffic, and the current P2P traffic ratio is obtained according to the current P2P traffic and the current video traffic.

Specifically, the P2P upload rate is (P2P upload amount/video traffic)%. Therefore, according to the current P2P upload amount and the current video traffic obtained above, the current P2P upload rate is obtained.

S101d: Calculate the CDN prefetch data amount according to the current P2P download amount, the current CDN download amount, and the initial CDN download probability.

Specifically, the CDN prefetch data amount indicates that the amount of data downloaded from the CDN is selected by the CDN download probability within a certain period of time, and the CDN prefetch data amount is: CDN download probability* video traffic. Thus, the current P2P download amount and the current CDN download amount are summed to obtain the current video traffic, and the initial CDN prefetch data amount is: initial CDN download probability* current video traffic.

The P2P data downloading method described in this embodiment sets the CDN download probability according to the network condition. The client player with high network bandwidth and high network speed has a greater chance of downloading more video data from the CDN server, and the network player with low network speed and low network speed downloads a small amount of video data from the CDN server, which can balance different The network bandwidth network speed client player can better perform P2P sharing data; and the CDN download probability of different client players is dynamically changed according to the previous CDN download probability, which is not easy to be downloaded from the CDN server. More video data can further improve the P2P download rate. The initial network status parameters include the initial P2P upload rate, the initial P2P traffic ratio, and the CDN prefetch data volume. The current network status parameters include the current P2P upload rate, the current P2P traffic ratio, and the current P2P upload amount, the P2P upload rate, the P2P traffic ratio, and the P2P. The amount of uploading and the amount of CDN prefetched data are conveniently obtained, and the present invention is facilitated.

Embodiment 3

In a preferred embodiment of the present invention, referring to FIG. 4, S102 compares the current network status parameter with the initial network status parameter, and updates the initial CDN download probability according to the comparison result to obtain the current CDN download probability, including:

S102a: Compare the current P2P upload rate, the current P2P traffic ratio, and the current P2P upload amount with the initial P2P upload rate, the initial P2P traffic ratio, and the CDN prefetch data amount, respectively, if the current P2P upload rate is greater than the initial P2P upload rate, current If the P2P traffic ratio is greater than or equal to the initial P2P traffic ratio and the current P2P upload amount is greater than or equal to the CDN prefetch data volume, execute S102b; if the current P2P upload rate is less than the preset ratio of the initial P2P upload rate, or the current P2P upload amount is less than the CDN prefetch For the amount of data, S101a is performed; if the current P2P upload rate is less than the initial P2P upload rate and greater than the preset ratio of the initial P2P upload rate, then S102c is performed.

Specifically, the preset ratio of the initial P2P upload rate, that is, a part of the initial P2P upload rate, if the preset ratio is 80%, the current P2P upload rate is less than 80% of the initial P2P upload rate. The preset ratio is not limited to 80%, and can be set according to the actual application. This is not specifically limited.

Specifically, if the current P2P upload rate is less than the preset ratio of the initial P2P upload rate, or the current P2P upload amount is less than the CDN prefetch data amount, execute S101a, that is, re-acquire the initial CDN download probability, and initialize the initial network status parameter, and initialize The CDN download probability update ratio is a preset value.

S102b: The initial CDN download probability is increased according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic ratio is used as the initial P2P traffic, and then S103 is performed.

For example, if the initial CDN download probability is 10% and the CDN download probability update ratio is 5%, the current CDN download probability is: 10%+5%=15%.

S102c: The initial CDN download probability is reduced according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic ratio is used as the initial P2P traffic, and then S103 is performed. .

For example, if the initial CDN download probability is 10% and the CDN download probability update ratio is 5%, the current CDN download probability is: 10%-5%=5%.

Specifically, the CDN download probability update ratio is preset, or is obtained according to a preset ratio decrease when the current P2P upload rate is less than the initial P2P upload rate and greater than the preset ratio of the initial P2P upload rate. The reduction according to the preset ratio may be set according to the actual application status, for example, it may be set to be reduced to 1/2, 1/3, etc., which is not specifically limited.

Wherein, when the CDN download probability update ratio is reduced according to a preset ratio, at least the following two methods can be implemented:

1) The CDN download probability update ratio is first reduced according to the preset ratio, and then the initial CDN download probability is reduced according to the CDN download probability update ratio.

For example, if the preset ratio is 1/2, the CDN download probability update ratio deta is first reduced to: deta=deta/2; then the initial CDN download probability C is reduced according to the CDN download probability update ratio. Is: C=C-deta.

2) The initial CDN download probability is first reduced according to the CDN download probability update ratio, and then the CDN download probability update ratio is further reduced according to the preset ratio. For example, the preset ratio is 1/2, and the initial CDN download probability C is first reduced according to the CDN download probability update ratio: C=C-deta; then the CDN download probability update ratio deta is further reduced according to the preset ratio: Deta=deta/2.

Moreover, it should be noted that the initial CDN download probability is preset and is 50% or less, and the maximum setting is 50% because theoretically, the implementation of p2p data download requires at least two nodes, and the 50% probability can be guaranteed in two. Nodes can download the data needed by the other party and share it with each other. When the range of the CDN download probability is set in advance, after the current CDN download probability is obtained by performing S102b, S102d, it is also required to determine whether the current CDN download probability is within the range of the CDN download probability, if not within the range of the CDN download probability, Then, the current CDN download probability needs to be limited to the range of the CDN download probability, and then the subsequent operations are performed. Limiting the current CDN download probability to the range of the CDN download probability. If the current CDN download probability is greater than the CDN download probability, the current CDN download probability may be the largest of the CDN download probabilities, such as the current CDN download probability is greater than The smallest CDN download probability can take the current CDN download probability as the smallest of the CDN download probabilities. The range of the CDN downloading probability is not limited to the above-mentioned range of values, and may be set according to actual application conditions, which is not limited thereto.

The P2P data downloading method described in this embodiment sets the CDN download probability according to the network condition, so that the client player with high network bandwidth and high network speed has a greater chance to download more video data from the CDN server, and the network bandwidth is small. The low-speed client player downloads very little video data from the CDN server, can balance different network bandwidth network speed client players, can better P2P share data; and, different client player CDN The download probability is dynamically changed according to the previous CDN download probability, and it is not easy to cause excessive video data to be downloaded from the CDN server, and the P2P download rate can be further improved. The range of CDN download probabilities can be preset, and the CDN download probability can be controlled within a certain range to avoid downloading too much video data from the CDN server.

Embodiment 4

In a preferred embodiment of the present invention, referring to FIG. 5, after the video data in the data block in the P2P download area is downloaded from the CDN server according to the current CDN download probability, the S103 further includes:

S104: The current CDN download probability is used as the initial CDN download probability and the current network status parameter as the initial network status parameter, and then the step of acquiring the initial CDN download probability, the initial network status parameter, and the current network status parameter is performed by S101.

That is, the operation is repeated repeatedly to adjust the CDN download probability at any time according to the network condition, so that the CDN download probability

The P2P data downloading method described in this embodiment sets the CDN download probability according to the network condition, so that the client player with high network bandwidth and high network speed has a greater chance to download more from the CDN server. Video data, network bandwidth, low network speed, low-speed client player downloads very little video data from CDN server, can balance different network bandwidth network speed client player, can better P2P share data; and, different The CDN download probability of the client player is dynamically changed according to the previous CDN download probability, and it is not easy to cause excessive video data to be downloaded from the CDN server, and the P2P download rate can be further improved. Repeated operations, dynamically change the CDN download probability in real time, and make better use of the current network status of the client player.

Embodiment 5

The fifth embodiment of the present invention provides a device for downloading P2P data. Referring to FIG. 6, the method may specifically include:

The obtaining module 201 is configured to obtain an initial CDN download probability, an initial network status parameter, and a current network status parameter, where the initial CDN download probability indicates that the video data in the data block in the initially set P2P download area is selected from the CDN server. Probability of downloading;

The processing module 202 is configured to compare the current network status parameter with the initial network status parameter, and update the initial CDN download probability according to the comparison result to obtain a current CDN download probability;

The downloading module 203 is configured to select video data in the data block in the P2P download area to be downloaded from the CDN server according to the current CDN download probability.

Further, the current network status parameter includes a current P2P upload rate, a current P2P traffic ratio, and a current P2P upload amount; the obtaining module 201 further includes: a statistics unit and a calculating unit;

The calculating unit is configured to calculate a current P2P upload rate and a current P2P traffic ratio according to the current P2P download amount, the current P2P upload amount, and the current CDN download amount.

Further, the initial network condition parameter includes an initial P2P upload rate, an initial P2P traffic ratio, and a CDN prefetch data amount, and the CDN prefetch data amount is calculated according to the current P2P download amount, the current CDN download amount, and the initial CDN download probability, and the processing module 202 Further comprising: a probability adjustment unit,

Probabilistic adjustment unit, if the current P2P upload rate is greater than the initial P2P upload rate, the current P2P If the traffic ratio is greater than or equal to the initial P2P traffic ratio and the current P2P upload amount is greater than or equal to the CDN prefetch data volume, the initial CDN download probability is increased according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P upload rate is made. The initial P2P upload rate and the current P2P traffic ratio are used as initial P2P traffic;

The probability adjustment unit is further configured to: if the current P2P upload rate is less than a preset ratio of the initial P2P upload rate, or the current P2P upload amount is less than the CDN prefetch data amount, re-acquire the initial CDN download probability, and initialize the initial network status parameter, and initialize The CDN download probability update ratio is a preset value;

The probability adjustment unit is further configured to: if the current P2P upload rate is less than the initial P2P upload rate and greater than the preset ratio of the initial P2P upload rate, reduce the initial CDN download probability according to the CDN download probability update ratio, and obtain the current CDN download probability. And the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic ratio as the initial P2P traffic.

Further, the CDN download probability update ratio is preset, or is obtained according to a preset ratio decrease when the current P2P upload rate is less than the initial P2P upload rate and greater than the preset ratio of the initial P2P upload rate.

Further, the initial CDN download probability is preset and is 50% or less.

The device for downloading P2P data according to the embodiment sets the CDN download probability according to the network condition, so that the client player with high network bandwidth and high network speed has a greater chance of downloading more video data and network bandwidth from the CDN server. The low-speed client player downloads very little video data from the CDN server, can balance different network bandwidth network speed client players, can better P2P share data; and, different client player CDN The download probability is dynamically changed according to the previous CDN download probability, and it is not easy to cause excessive video data to be downloaded from the CDN server, and the P2P download rate can be further improved. The initial network status parameters include the initial P2P upload rate, the initial P2P traffic ratio, and the CDN prefetch data volume. The current network status parameters include the current P2P upload rate, the current P2P traffic ratio, and the current P2P upload amount, the P2P upload rate, the P2P traffic ratio, and the P2P. The amount of uploading and the amount of CDN prefetched data are conveniently obtained, and the present invention is facilitated. Repeated operations, dynamically change the CDN download probability in real time, and make better use of the current network status of the client player.

The device corresponds to the foregoing method flow description, and the deficiencies refer to the description of the above method flow, and will not be further described.

A person skilled in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by using hardware related to the program instructions. The foregoing program may be stored in a computer readable storage medium, and the program is executed when executed. The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

A method for downloading P2P data, characterized in that the method comprises:

Obtaining an initial CDN download probability, an initial network status parameter, and a current network status parameter; wherein the initial CDN download probability indicates a probability that video data in the initially set data block in the P2P download area is selected to be downloaded from the CDN server;

Comparing the current network status parameter with the initial network status parameter, and updating the initial CDN download probability according to the comparison result to obtain a current CDN download probability;

And selecting video data in the data block in the P2P download area to be downloaded from the CDN server according to the current CDN download probability. The method of claim 1, wherein the current network status parameter comprises a current P2P upload rate, a current P2P traffic ratio, and a current P2P upload amount; and the current network status parameter is obtained, including:

Counting the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the preset time interval;

And calculating the current P2P upload rate and the current P2P traffic ratio according to the current P2P download amount, the current P2P upload amount, and the current CDN download amount.
The method according to claim 2, wherein said initial network condition parameter comprises an initial P2P upload rate, an initial P2P traffic ratio, and a CDN prefetch data amount, said CDN prefetch data amount being based on said current P2P download amount Calculating the current CDN download amount and the initial CDN download probability;

Obtaining the initial CDN download probability and the initial network condition parameter includes: obtaining an initial CDN download probability returned by the play server, and initializing the initial P2P upload rate, the initial P2P traffic ratio, and the CDN download probability update ratio.
The method according to claim 3, wherein the current network status parameter is compared with the initial network status parameter, and the initial CDN download probability is updated according to the comparison result to obtain a current CDN download probability, including :

And if the current P2P upload rate is greater than the initial P2P upload rate, the current P2P traffic ratio is greater than or equal to the initial P2P traffic ratio, and the current P2P upload amount is greater than or equal to the CDN prefetched data amount, Initial CDN download probability, according to the CDN download probability update ratio The line is incremented to obtain the current CDN download probability, and the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic ratio as the initial P2P traffic.
The method of claim 2, wherein the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the preset time interval are specifically included in the following steps:

B1: when the P2P engine successfully establishes a connection with the play server and determines that the p2p data interaction can be performed, the time is counted by the first timer and the second timer;

B2: when the statistical time of the first timer reaches the first preset time interval, determining whether to end the statistics of the first timer by using a preset statistical end probability, and if it is determined to end the statistics of the first timer, Execute b6; otherwise, execute b3;

B3: determining whether the time of the second timer is greater than or equal to a second preset time interval, if greater than or equal to the second preset time interval, executing b5; otherwise, executing b4;

B4: clear the statistical time of the first timer, the first timer restarts the statistical time, and then executes b2;

B5: the second timer ends the statistics, and then executes b6;

B6: Calculate the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the statistical time of the second timer.
The method according to claim 3, wherein the CDN download probability update ratio is preset, or the pre-P2P upload rate is smaller than the initial P2P upload rate and greater than the initial P2P upload rate. When the ratio is set, it is obtained by reducing the preset ratio.
The method according to claim 4, wherein the current network status parameter is compared with the initial network status parameter, and the initial CDN download probability is updated according to the comparison result to obtain a current CDN download probability, include:

If the current P2P upload rate is less than a preset ratio of the initial P2P upload rate, or the current P2P upload amount is smaller than the CDN prefetch data amount, re-acquiring the initial CDN download probability, and initializing the initial The network status parameter initializes the CDN download probability update ratio to a preset value.
The method according to claim 4, wherein the current network status parameter is compared with the initial network status parameter, and the initial CDN download probability is obtained according to the comparison result. Update to get the current CDN download probability, including:

If the current P2P upload rate is smaller than the initial P2P upload rate and greater than a preset ratio of the initial P2P upload rate, the initial CDN download probability is reduced according to the CDN download probability update ratio, and the obtained The current CDN download probability is described, and the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic ratio is used as the initial P2P traffic.
The method of claim 1, wherein the initial CDN download probability is preset and less than or equal to 50%.
The method of claim 1, wherein after the video data in the data block in the P2P download area is downloaded from the CDN server, the method further comprises:

The current CDN download probability is used as an initial CDN download probability and the current network status parameter as an initial network status parameter.
A device for downloading P2P data, characterized in that the device comprises:

An obtaining module, configured to obtain an initial CDN download probability, an initial network status parameter, and a current network status parameter; wherein the initial CDN download probability indicates that video data in a data block in an initially set P2P download area is selected from a CDN server The probability of downloading;

a processing module, configured to compare the current network status parameter with the initial network status parameter, and update the initial CDN download probability according to the comparison result to obtain a current CDN download probability;

And a downloading module, configured to select video data in the data block in the P2P download area to be downloaded from the CDN server according to the current CDN download probability.
The device according to claim 11, wherein the current network status parameter comprises a current P2P upload rate, a current P2P traffic ratio, and a current P2P upload amount; the obtaining module further comprising: a statistics unit and a calculating unit;

The statistics unit is configured to count the current P2P download amount, the current P2P upload amount, and the current CDN download amount in the preset time interval;

The calculating unit is configured to calculate the current P2P upload rate and the current P2P traffic ratio according to the current P2P download amount, the current P2P upload amount, and the current CDN download amount.
The apparatus according to claim 12, wherein said initial network condition parameter comprises an initial P2P upload rate, an initial P2P traffic ratio, and a CDN prefetch data amount, said CDN prefetch data amount being based on said current P2P download amount Calculating the current CDN download amount and the initial CDN download probability;

Obtaining the initial CDN download probability and the initial network condition parameter includes: obtaining an initial CDN download probability returned by the play server, and initializing the initial P2P upload rate, the initial P2P traffic ratio, and the CDN download probability update ratio.
The apparatus according to claim 13, wherein said processing module further comprises: a probability adjustment unit,

The probability adjustment unit is configured to: if the current P2P upload rate is greater than the initial P2P upload rate, the current P2P traffic ratio is greater than or equal to the initial P2P traffic ratio, and the current P2P upload amount is greater than or equal to the CDN pre- Taking the amount of data, the initial CDN download probability is increased according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P upload rate is used as the initial P2P upload rate. The current P2P traffic ratio is used as the initial P2P traffic.
The device according to claim 12, wherein the statistical unit is further configured to perform the following steps:

B1: when the P2P engine successfully establishes a connection with the play server and determines that the p2p data interaction can be performed, the time is counted by the first timer and the second timer;

B2: when the statistical time of the first timer reaches the first preset time interval, determining whether to end the statistics of the first timer by using a preset statistical end probability, and if it is determined to end the statistics of the first timer, Execute b6; otherwise, execute b3;

B3: determining whether the time of the second timer is greater than or equal to a second preset time interval, if greater than or equal to the second preset time interval, executing b5; otherwise, executing b4;

B4: clear the statistical time of the first timer, the first timer restarts the statistical time, and then executes b2;

B5: the second timer ends the statistics, and then executes b6;

B6: Calculating the current P2P download amount in the statistical time of the second timer, and currently on the P2P Volume and current CDN downloads.
The apparatus according to claim 13, wherein the CDN download probability update ratio is preset, or the pre-P2P upload rate is smaller than the initial P2P upload rate and greater than the initial P2P upload rate. When the ratio is set, it is obtained by reducing the preset ratio.
The apparatus according to claim 14, wherein the probability adjustment unit is further configured to: if the current P2P upload rate is less than a preset ratio of the initial P2P upload rate, or the current P2P upload amount is less than When the CDN prefetches the data amount, the initial CDN download probability is re-acquired, and the initial network condition parameter is initialized, and the CDN download probability update ratio is initialized to a preset value.
The device according to claim 14, wherein the probability adjustment unit is further configured to: if the current P2P upload rate is less than the initial P2P upload rate and greater than a preset ratio of the initial P2P upload rate, The initial CDN download probability is reduced according to the CDN download probability update ratio, and the current CDN download probability is obtained, and the current P2P upload rate is used as the initial P2P upload rate and the current P2P traffic. The ratio is taken as the initial P2P traffic.
The apparatus according to claim 11, wherein said initial CDN download probability is preset and is 50% or less.
The apparatus according to claim 11, wherein said acquisition module is further configured to:

After the downloading module selects the video data in the data block in the P2P download area to be downloaded from the CDN server, the current CDN download probability is used as the initial CDN download probability and the current network status parameter as the initial network status parameter. .