CN104702646A

CN104702646A - Data transmission method and device and communication system

Info

Publication number: CN104702646A
Application number: CN201310662157.6A
Authority: CN
Inventors: 杨阳; 谢立强
Original assignee: Tencent Technology Shenzhen Co Ltd
Current assignee: Tencent Technology Shenzhen Co Ltd
Priority date: 2013-12-09
Filing date: 2013-12-09
Publication date: 2015-06-10
Also published as: WO2015085794A1

Abstract

An embodiment of the invention discloses a data transmission method and device and a communication system. The data transmission method includes: transmitting M segment-based download requests to N servers, with each of the M segment-based download requests carrying a file segment number descriptor and any two of the M segment-based download requests carrying the file segment number descriptors which describe different file segment numbers, and receiving M segment-based download responses fed back by the N servers. The M segment-based download responses are in one-to-one correspondence to the M segment-based download requests; each of the M segment-based download responses carries a file segment which corresponds to a file segment number described in the file segment number descriptor carried in the segment-based download request corresponding to the segment-based download response. The technical scheme provided by the embodiment has the advantages that file downloading load balance can be improved and application reasonableness of network bandwidth can be improved.

Description

Data transmission method and relevant apparatus and communication system

Technical field

The present invention relates to networking technology area, specifically relate generally to a kind of data transmission method and relevant apparatus and communication system.

Background technology

Along with the develop rapidly of Internet technology and terminal technology, many Internet services are had to relate to network data transmission and data interaction.Accelerating the transmission that data are shown at each node, is the important means improved service quality, promote Consumer's Experience.

Such as, HTTP (http, Hypertext transfer protocol) supports that single-threaded download and multithreading are downloaded.Wherein, during the single-threaded download file of http, do not carry out burst, a corresponding file of http request.In existing http multithreading download mechanism, each thread sends http request (carrying file fragmentation information in http request) to same file server, after file server receives these http request, carry file fragmentation information according to http request and respond requested file fragmentation, identification document burst in the message of response.

The present inventor finds in research and practice process, and prior art at least exists following technical problem: the single-threaded download mechanism of existing http is severely limited by the bandwidth bottleneck of single connection.And the load-balancing performance that existing http multithreading is downloaded is poor, easily there is the situation that the load of separate unit file server or bandwidth are drained by a few users.

Summary of the invention

The embodiment of the present invention provides data transmission method and relevant apparatus and communication system, to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

The embodiment of the present invention provides a kind of method of transfer of data on the one hand, comprising:

Determine N number of server of the file fragmentation of asking file to be downloaded;

Generate M burst download request;

Described M burst download request is sent to described N number of server, wherein, any one server in described N number of server at least receives at least one the burst download request in described M burst download request, wherein, each burst download request among described M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among described M burst download request, wherein, described M and described N be greater than 1 positive integer, wherein, described M is greater than or equal to described N,

M the burst receiving described N number of server feedback downloads response;

Wherein, described M burst downloads response and described M burst download request one_to_one corresponding, described M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

The embodiment of the present invention provides a kind of data transmission device on the other hand, comprising:

Determining unit, for determining N number of server of the file fragmentation of asking file to be downloaded;

Generation unit, for generating M burst download request;

Transmitting element, for sending M burst download request to N number of server, , wherein, any one server in described N number of server at least receives at least one the burst download request in described M burst download request, each burst download request among described M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among described M burst download request, wherein, described M and described N is positive integer, wherein, described M is greater than or equal to described N,

Receiving element, downloads response for M the burst receiving described N number of server feedback;

The another aspect of the embodiment of the present invention provides a kind of content distribution network system, comprising:

Distributed points and X time source server;

Wherein, described distributed points, for returning from X N number of server that source server determines the file fragmentation for asking file to be downloaded; Generate M burst download request; Send M burst download request to described X the described N number of time source server returned among source server, any one server in described N number of server at least receives at least one the burst download request in described M burst download request; M the burst receiving described N number of time source server feedback downloads response; Wherein, each burst download request among described M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among described M burst download request, wherein, described M, described X and described N are positive integer, described M is greater than or equal to described N, and described X is greater than or equal to described N; Described M burst downloads response and described M burst download request one_to_one corresponding, described M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

Can find out, in the technical scheme of the embodiment of the present invention, requesting party sends M the burst download request generated to N number of server, wherein, any one server in N number of server at least receives at least one the burst download request in above-mentioned M burst download request, wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request; M the burst receiving above-mentioned N number of server feedback downloads response; Above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Owing to introducing file fragmentation mechanism, requesting party can to the different file fragmentations of multiple server request identical file, and be conducive to the parallel downloading realizing different file fragmentation, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged in the appropriate case, so as embodiments of the invention described herein can with except here diagram or describe those except order implement.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.

For ease of the following proposal of the better embodiment of the present invention, below some concepts that may introduce simply are introduced.

Content distributing network (CDN, Content Delivery Network), in Internet, increase the new network architecture of one deck, the content of server in station can be published to the network " edge " closest to user, make user can obtain required content nearby, to solve the crowded situation of Internet network, improve the response speed of user's access websites.

OC(Outside Center) be the node of CDN.

Hui Yuan typically refers to, and when user terminal asks certain file or file fragmentation to OC, first OC checks whether oneself stores this file or file fragmentation, does not have expired, then directly return to user terminal if having and store; Oneself whether store this file or file fragmentation if OC is checked through or stores out of date, then OC arrives first its source server request latest document or file fragmentation, then this file of asking or file fragmentation are returned to user.

Namely distributed points is access point or the intermediate node of CDN, and distributed points can be lived a part of data but usually do not have full dose data by cache.Return source server, distributed points can configure back source server, the data that distributed points cache does not hit, and the source server that returns that can arrive configuration pulls.Return time source server that source server also can configure its down hop, configure step by step, until the central point of CDN.Central point is namely final returns source server, and the finish node of CDN, can move the data of full dose to from central point.

An embodiment of the method for a kind of transfer of data of the present invention, wherein, a kind of method of transfer of data can comprise: the N number of server determining the file fragmentation of asking file to be downloaded, generate M burst download request, M burst download request is sent to N number of time source server, wherein, any one server in described N number of server at least receives at least one the burst download request in described M burst download request, wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request, wherein, above-mentioned M and above-mentioned N be greater than 1 positive integer, above-mentioned M is greater than or equal to above-mentioned N, M the burst receiving above-mentioned N number of time source server feedback downloads response, above-mentioned M burst downloads response and above-mentioned M burst download request one_to_one corresponding, above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

First refer to Fig. 1, Fig. 1 is the schematic flow sheet of the method for a kind of transfer of data that one embodiment of the invention provides.As shown in Figure 1, a kind of method of transfer of data that one embodiment of the invention provides can comprise following content:

101, N number of server of the file fragmentation of asking file to be downloaded is determined.

Such as, N number of server of the file fragmentation for asking file to be downloaded can be determined from X server.Such as, N number of server is meet the server imposed a condition in X server, concrete example, N number of server can be the server of least-loaded in X server, or N number of server can be the server of network condition optimum in X server, or N number of server can be the server of handling property optimum in X server.Or above-mentioned N number of server can be any N number of server in X server.Certainly, in actual applications, N number of server of the file fragmentation of asking file to be downloaded is also determined by alternate manner.

The server that the embodiment of the present invention is mentioned can be back the server of source server or other type.

102, M burst download request is generated.

103, M burst download request is sent to N number of server.

Wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor.Wherein, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request.Wherein, above-mentioned M and above-mentioned N be greater than 1 positive integer.Wherein, above-mentioned M is greater than or equal to above-mentioned N.Wherein, any one server in described N number of server at least receives at least one the burst download request in described M burst download request.

Be appreciated that, at least one the burst download request among above-mentioned M burst download request is at least sent to any one server in above-mentioned N number of server, accordingly, any one server in above-mentioned N number of server at least receives at least one the burst download request among above-mentioned M burst download request.

Wherein, any one among above-mentioned M the burst download request file fragmentation descriptor entrained by burst download request can describe one or more file fragmentation number.Wherein, file fragmentation descriptor can be any information that can describe out file fragmentation number.

104, M the burst receiving above-mentioned N number of server feedback downloads response.

Wherein, above-mentioned M burst downloads response and above-mentioned M burst download request one_to_one corresponding, above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

In some embodiments of the invention, consider the harmony between N number of server, if above-mentioned M is integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of the burst download request sent to any 1 server in above-mentioned N number of server is less than or equal to k1, wherein, above-mentioned k1 equals the business that above-mentioned M obtains divided by above-mentioned N.So, be conducive to ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.Such as, suppose that M equals 20, N and equals 10, then the quantity of the burst download request sent to any one server in 10 servers is 2.Suppose that again M equals 10, N equals 10, the quantity of the burst download request then sent to any one server in 10 servers equals 1, can find out, such restricted number is conducive to ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.

In some embodiments of the invention, consider the harmony between N number of server, if above-mentioned M is non-integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of the burst download request sent to any one server in above-mentioned N number of server is less than or equal to k2, and above-mentioned k2 equals the value that rounds up of the business that above-mentioned M obtains divided by above-mentioned N.Be conducive to like this ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.Such as, suppose that M equals 25, N and equals 10, then the quantity of the burst download request sent to any one server in 10 servers is less than or equal to 3.Suppose that again M equals 15, N equals 10, the quantity of the burst download request then sent to any one server in 10 servers is less than or equal to 2, can find out, such restricted number is conducive to ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.

In other embodiments of the present invention, consider the harmony between N number of server, if above-mentioned M is non-integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of the burst download request sent to any one server in above-mentioned N number of server is less than or equal to k2 and is more than or equal to k3, above-mentioned k2 equals the value that rounds up of the business that above-mentioned M obtains divided by above-mentioned N, and what above-mentioned k3 equaled the business that above-mentioned M obtains divided by above-mentioned N rounds value downwards.Be conducive to like this ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.Such as, suppose that M equals 25, N and equals 10, then the quantity of the burst download request sent to any one server in 10 servers is less than or equal to 3 and is more than or equal to 2.Suppose that again M equals 15, N equals 10, the quantity of the burst download request then sent to any one server in 10 servers is less than or equal to 2 and is more than or equal to 1, can find out, such restricted number is conducive to ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.

In some embodiments of the invention, if described N number of server is N number of time source server, then above-mentionedly send M burst download request to N number of server, can comprise: by distributed points (or user terminal (as micro-credit household's terminal) or miscellaneous equipment) Xiang Huiyuan N number of server transmission M the burst download request in content distributing network.

In some embodiments of the invention, above-mentionedly send M burst download request to N number of server and can comprise: to utilize and M that N number of server is set up is individual concurrent connection sends M burst download request to above-mentioned N number of server.Wherein, M that sets up with N number of server if utilize sends M burst download request to above-mentioned N number of server concurrent connection, then can realize synchronously sending M burst download request to N number of server.Wherein, for larger data transmitting scene, it is data serial transmission time delay that this parallel mode can make time delay reduce to t/M(t, and M is number of concurrent).

In some embodiments of the invention, directly above-mentioned M burst download can be responded M the file fragmentation carried and carry out buffer memory.Or, further above-mentioned M burst can be downloaded and respond M the file fragmentation carried and carry out combining obtaining complete being fragmented file.Wherein, M file fragmentation can be carried out combine obtaining complete being fragmented file based on the file fragmentation of M file fragmentation number.Wherein, N number of server all can obtain this be fragmented file (obtain from buffer memory be fragmented file or from other server be fragmented file or miscellaneous equipment obtain be fragmented file), and file can be fragmented carry out burst to this and obtain multiple file fragmentation (as M or more file fragmentation) according to identical sliced fashion, each server is to the file fragmentation corresponding to requesting party's feedback request.

In some embodiments of the invention, above-mentioned burst is downloaded in the HTTP header field of response or abstract syntax notation one agreement header field or custom protocol header field (or other application layer protocol header field) and can be carried this burst and download file fragmentation length information corresponding to file fragmentation entrained by response.For example, the length of the file fragmentation that burst is downloaded entrained by response is 50kb, the file fragmentation length information that the file fragmentation of this 50kb that this burst download response is carried is corresponding can be " 50kb ", and this file fragmentation length information also may be other form information that can indicate 50kb certainly.

Can find out, among the scheme of the present embodiment, requesting party sends M burst download request to N number of server, wherein, any one server in N number of server at least receives at least one the burst download request in above-mentioned M burst download request, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request; M the burst receiving above-mentioned N number of server feedback downloads response; Above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Owing to introducing file fragmentation mechanism, requesting party can to the different file fragmentations of multiple server request identical file, and be conducive to the parallel downloading realizing different file fragmentation, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

For ease of better understanding and implement the such scheme of the embodiment of the present invention, be illustrated below by some object lessons in some content distributing networks.

Refer to Fig. 2-a, Fig. 2-a is the schematic flow sheet of the method for the another kind of transfer of data that another embodiment of the present invention provides.As shown in Fig. 2-a, the method for the another kind of transfer of data that another embodiment of the present invention provides can comprise following content:

201, return from X the N number of server determining the file fragmentation of asking file to be downloaded source server.

Such as, N number of server is meet the server imposed a condition in X server, concrete example, N number of server can be the server of least-loaded in X server, or N number of server can be the server of network condition optimum in X server, or N number of server can be the server of handling property optimum in X server.Or above-mentioned N number of server can be any N number of server in X server.Certainly, in actual applications, N number of server of the file fragmentation of asking file to be downloaded is also determined by alternate manner.

202, distributed points is set up and is connected with the N number of concurrent of N number of time source server.

203, distributed points generates N number of burst download request, utilizes set up with N number of time source server N number of concurrent to be connected, sends N number of burst download request to N number of time source server.

Wherein, N number of concurrent connection and N number of burst download request one_to_one corresponding.

Wherein, utilize set up with N number of time source server N number of concurrent connection send N number of burst download request to above-mentioned N number of time source server, can realize synchronously sending N number of burst download request to N number of time source server.Wherein, for larger data transmission, it is data serial transmission time delay that this parallel mode can make time delay reduce to t/N(t, and N is concurrent connection number).

Wherein, each burst download request among above-mentioned N number of burst download request carries file fragmentation descriptor.Wherein, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned N number of burst download request.Wherein, above-mentioned N and above-mentioned N be greater than 1 positive integer.

Wherein, any one among the above-mentioned N number of burst download request file fragmentation descriptor entrained by burst download request can describe one or more file fragmentation number.Wherein, file fragmentation descriptor can be any information that can describe out file fragmentation number.

204, distributed points receives N number of burst download response of above-mentioned N number of time source server feedback.

Above-mentioned N number of burst downloads response and above-mentioned N number of burst download request one_to_one corresponding, each burst that above-mentioned N number of burst is downloaded among response downloads response, carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

Wherein, when distributed points is to N number of time certain file of source server request or file fragmentation, first N number of time source server check whether oneself stores this file or file fragmentation, do not have expired, then directly return to distributed points if having and store; Return time source server that source server also can configure its down hop, configuration is until the central point of CDN step by step.Oneself whether store this file or file fragmentation if time source server is checked through or stores out of date, returning time source server request latest document or file fragmentation that source server configures to it, then this file of asking or file fragmentation are returned to distributed points.Fig. 2-b shows back source server and obtains file or file fragmentation scene step by step.

205, above-mentioned N number of burst is downloaded and is responded the file fragmentation (as N number of file fragmentation or more file fragmentation) carried and carry out combining obtaining complete being fragmented file by distributed points.

Wherein, N number of file fragmentation can be carried out combine obtaining complete being fragmented file based on the file fragmentation of N number of file fragmentation number.Wherein, N number of time source server all can obtain this be fragmented file (obtain from buffer memory be fragmented file or from other time source server be fragmented file or miscellaneous equipment obtain be fragmented file), and file can be fragmented carry out burst to this and obtain multiple file fragmentation (such as N number of or more a file fragmentation) according to identical sliced fashion.And each time source server is to the file fragmentation corresponding to distributed points feedback request.

In some embodiments of the invention, the total number of file fragmentation and above-mentioned file fragmentation descriptor can be carried in the HTTP header field of above-mentioned N number of burst download request or abstract syntax notation one agreement header field or custom protocol header field (or other application layer protocol header field).Such as, can carry the total number N of file fragmentation and above-mentioned file fragmentation descriptor in the X-Range field of the HTTP header field of N number of burst download request or other field.

In some embodiments of the invention, above-mentioned burst is downloaded in the HTTP header field of response or abstract syntax notation one agreement header field or custom protocol header field (or other application layer protocol header field) and can be carried this burst and download file fragmentation length information corresponding to file fragmentation entrained by response, certainly, burst is downloaded in the HTTP header field or abstract syntax notation one agreement header field or custom protocol header field (or other application layer protocol header field) responded and also can be carried the out of Memory such as file fragmentation descriptor and/or the total number of file fragmentation.For example, above-mentioned burst is downloaded in the X-Content-Range field of the HTTP header field of response or other field and can be carried this burst and download file fragmentation length information corresponding to file fragmentation entrained by response.Such as, the length of the file fragmentation that burst is downloaded entrained by response is 500kb, the file fragmentation length information that the file fragmentation of this 500kb that this burst download response is carried is corresponding can be " 500kb ", certainly, this file fragmentation length information also may be other form information that can indicate 500kb.

Can find out, among the scheme of the present embodiment, distributed points sends N number of burst download request to N number of time source server, wherein, any one server in N number of server receives at least one the burst download request in N number of burst download request, wherein, each burst download request among above-mentioned N number of burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned N number of burst download request; The N number of burst receiving above-mentioned N number of time source server feedback downloads response; Each burst that above-mentioned N number of burst is downloaded among response downloads response, carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Owing to introducing file fragmentation mechanism, distributed points utilizes N number of concurrent connection, please the different file fragmentations of identical file to N number of time source server, which achieves the parallel downloading of the different file fragmentations of identical file, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

Refer to Fig. 3, Fig. 3 is the schematic flow sheet of the method for the another kind of transfer of data that another embodiment of the present invention provides.As shown in Figure 3, the method for another kind of transfer of data that another embodiment of the present invention provides can comprise following content:

301, return from X the N number of server determining the file fragmentation of asking file to be downloaded source server.

302, distributed points sets up be connected concurrent with the M of N number of time source server.

303, distributed points generates M burst download request, utilizes that the M set up with N number of time source server is individual to be concurrently connected, to N number of time source server transmission M burst download request.

Wherein, M=k1*N, k1 be greater than 1 positive integer, M concurrent connection and M burst download request one_to_one corresponding.

Such as, suppose that M equals 20, N and equals 10, then the quantity of returning to 10 any one of returning in source server the burst download request that source server sends is 2.Suppose that again M equals 50, N equals 10, the quantity of then returning to 10 any one of returning in source server the burst download request that source server sends equals 5, can find out, such restricted number is conducive to ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.

Wherein, utilize M of setting up with N number of time source server concurrent connection to send M burst download request to above-mentioned N number of time source server, can realize synchronous to N number of time source server transmission M burst download request.Wherein, for larger data transmission, it is data serial transmission time delay that this parallel mode can make time delay reduce to t/N(t, and N is concurrent connection number).

Wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor.Wherein, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request.Wherein, above-mentioned M and above-mentioned N be greater than 1 positive integer.

Be appreciated that, k1 burst download request among above-mentioned M burst download request is at least sent to time source server of any one in above-mentioned N number of time source server, accordingly, any one time source server in above-mentioned N number of time source server at least receives k1 burst download request among above-mentioned M burst download request.

304, distributed points receives M burst download response of above-mentioned N number of time source server feedback.

305, above-mentioned M burst is downloaded and is responded the file fragmentation (as N number of file fragmentation or more file fragmentation) carried and carry out combining obtaining complete being fragmented file by distributed points.

Wherein, such as M file fragmentation can be carried out combine obtaining complete being fragmented file based on the file fragmentation of M file fragmentation number.Wherein, M return source server all can obtain this be fragmented file (obtain from buffer memory be fragmented file or from other time source server be fragmented file or miscellaneous equipment obtain be fragmented file), and file can be fragmented carry out burst to this and obtain multiple file fragmentation (such as M or more a file fragmentation) according to identical sliced fashion.And each time source server is to the file fragmentation corresponding to distributed points feedback request.

In some embodiments of the invention, the total number of file fragmentation and above-mentioned file fragmentation descriptor can be carried in the HTTP header field of above-mentioned M burst download request or abstract syntax notation one agreement header field or custom protocol header field (or other application layer protocol header field).Such as, can carry the total number M of file fragmentation and above-mentioned file fragmentation descriptor in the X-Range field of the HTTP header field of M burst download request or other field

Can find out, among the scheme of the present embodiment, requesting party sends M burst download request to N number of time source server, wherein, M=k1*N, k1 be greater than 1 positive integer, any one server in N number of server at least receives at least one the burst download request in M burst download request, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request; M the burst receiving above-mentioned N number of time source server feedback downloads response; Above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Owing to introducing file fragmentation mechanism, distributed points utilizes M concurrent connection, please the different file fragmentations of identical file to N number of time source server, which achieves the parallel downloading of the different file fragmentations of identical file, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

Refer to Fig. 4, Fig. 4 is the schematic flow sheet of the method for the another kind of transfer of data that another embodiment of the present invention provides.As shown in Figure 4, the method for another kind of transfer of data that another embodiment of the present invention provides can comprise following content:

401, return from X the N number of server determining the file fragmentation of asking file to be downloaded source server.

Such as, N number of server can be the server meeting in X server and impose a condition, concrete example, N number of server can be the server of least-loaded in X server, or N number of server can be the server of network condition optimum in X server, or N number of server can be the server of handling property optimum in X server.Or above-mentioned N number of server can be any N number of server in X server.Certainly, in actual applications, N number of server of the file fragmentation of asking file to be downloaded is also determined by alternate manner.

402, distributed points sets up be connected concurrent with the M of N number of time source server.

403, distributed points generates M burst download request, utilizes that the M set up with N number of time source server is individual to be concurrently connected, to N number of time source server transmission M burst download request.

Wherein, k3*N≤M≤k2*N, k2-k3=1.Wherein, k3 is positive integer, k2 be greater than 1 positive integer, M concurrent connection and M burst download request one_to_one corresponding.

For example, suppose that M equals 25, N and equals 10, then the quantity of returning to 10 any one of returning in source server the burst download request that source server sends is less than or equal to 3 and is greater than or equal to 2.Suppose that again M equals 15, N equals 10, the quantity of then returning to 10 any one of returning in source server the burst download request that source server sends equals to be less than or equal to 2 and is greater than or equal to 1, can find out, such restricted number is conducive to ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.

404, distributed points receives M burst download response of above-mentioned N number of time source server feedback.

405, above-mentioned M burst is downloaded and is responded the file fragmentation (as N number of file fragmentation or more file fragmentation) carried and carry out combining obtaining complete being fragmented file by distributed points.

In some embodiments of the invention, the total number of file fragmentation and above-mentioned file fragmentation descriptor can be carried in the HTTP header field of above-mentioned M burst download request or abstract syntax notation one agreement header field or custom protocol header field (or other application layer protocol header field).Such as, can carry the total number M of file fragmentation and above-mentioned file fragmentation descriptor in the X-Range field of the HTTP header field of M burst download request or other field.

Can find out, among the present embodiment scheme, requesting party sends M burst download request to N number of time source server, wherein, k3*N≤M≤k2*N, k2-k3=1, k3 and k2 is positive integer, wherein k2 is greater than 1, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, any one server in N number of server at least receives at least one the burst download request in M burst download request, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request, M the burst receiving above-mentioned N number of time source server feedback downloads response, above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Owing to introducing file fragmentation mechanism, distributed points utilizes M concurrent connection, please the different file fragmentations of identical file to N number of time source server, which achieves the parallel downloading of the different file fragmentations of identical file, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

For ease of better understanding and the such scheme of the embodiment embodiment of the present invention, be also provided for the relevant apparatus of enforcement such scheme below.

See Fig. 5-a, the embodiment of the present invention also provides data transmission device 500 to comprise: transmitting element 510 and receiving element 520, determining unit 530 and generation unit 540.

Determining unit 530, for determining N number of server of the file fragmentation of asking file to be downloaded.

Such as, N number of server is meet the server imposed a condition in X server, concrete example, N number of server can be the server of least-loaded in X server, or N number of server can be the server of network condition optimum in X server, or N number of server can be the server of handling property optimum in X server.Or above-mentioned N number of server can be any N number of server in X server.Certainly, in actual applications, determining unit 530 also determines N number of server of the file fragmentation of asking file to be downloaded by alternate manner.

Generation unit 540, for generating M burst download request.

Transmitting element 510, for sending M burst download request to N number of server, any one server in described N number of server at least receives at least one the burst download request in described M burst download request, each burst download request among described M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among described M burst download request, wherein, described M and described N is positive integer, wherein, described M is greater than or equal to described N.

Receiving element 520, downloads response for M the burst receiving described N number of server feedback;

In some embodiments of the invention, consider the harmony between N number of server, if above-mentioned M is integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of the burst download request sent to any one server in above-mentioned N number of server is less than or equal to k1, wherein, above-mentioned k1 equals the business that above-mentioned M obtains divided by above-mentioned N.So, be conducive to ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.Such as, suppose that M equals 20, N and equals 10, then the quantity of the burst download request sent to any one server in 10 servers is 2.Suppose that again M equals 10, N equals 10, the quantity of the burst download request then sent to any one server in 10 servers equals 1, can find out, such restricted number is conducive to ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.

In some embodiments of the invention, consider the harmony between N number of server, if above-mentioned M is non-integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of the burst download request sent to any one server in above-mentioned N number of server is less than or equal to k2, and above-mentioned k2 equals the value that rounds up of the business that above-mentioned M obtains divided by above-mentioned N.Be conducive to like this ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.Such as suppose that M equals 25, N and equals 10, then the quantity of the burst download request sent to any one server in 10 servers is less than or equal to 3.Suppose that again M equals 15, N equals 10, the quantity of the burst download request then sent to any one server in 10 servers is less than or equal to 2, can find out, such restricted number is conducive to ensureing that each server in N number of server processes the burst download request of equal number or Similar numbers as far as possible.

In some embodiments of the invention, transmitting element 510 specifically for, utilize that the M set up with N number of server is individual sends M burst download request to described N number of server concurrent connection.

See Fig. 5-b, in some embodiments of the invention, data transmission device 500 also can comprise:

Assembled unit 550, responds M the file fragmentation carried carry out combining obtaining complete being fragmented file for being downloaded described M burst.

In some embodiments of the invention, the total number M of file fragmentation and above-mentioned file fragmentation descriptor can be carried in the HTTP header field of above-mentioned M burst download request or abstract syntax notation one agreement header field or custom protocol header field (or other application layer protocol header field).

Be understandable that, the function of each functional module of the data transmission device 500 of the present embodiment can according to the method specific implementation in said method embodiment, and its specific implementation process with reference to the associated description of said method embodiment, can repeat no more herein.

Can find out, the data transmission device 500 of the present embodiment sends M burst download request to N number of server, wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request; M the burst receiving above-mentioned N number of server feedback downloads response; Above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Due to the mechanism introducing file fragmentation download of initiative, data transmission device 500 can to the different file fragmentations of multiple server request identical file, and be conducive to the parallel downloading realizing different file fragmentation, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

See the structured flowchart that Fig. 6, Fig. 6 are the distributed points 600 that another embodiment of the present invention provides.

Wherein, distributed points 600 can comprise: at least one processor 601, at least one network interface 604 or other user interfaces 603, memory 605, at least one communication bus 602.Communication bus 602 is for realizing the connection communication between these assemblies.Wherein, distributed points 600 optionally comprises user interface 603, specifically can comprise: display (such as touch-screen, LCD, CRT, holographic imaging or projection etc.), pointing device are (such as, mouse, trace ball (trackball) touch-sensitive plate or touch-screen etc.), camera and/or sound pick up equipment etc.

Wherein, memory 602 can comprise read-only memory and random access memory, and provides instruction and data to processor 601.A part in memory 602 can also comprise nonvolatile RAM etc.

In some embodiments, memory 605 stores following element, executable module or data structure, or their subset, or their superset:

Operating system 6051, comprises various system program, for realizing various basic business and processing hardware based task;

Application program module 6052, comprises various application program, for realizing various applied business.

Transmitting element 510, receiving element 520, determining unit 530 and/or generation unit 540 etc. are included but not limited in application program module 6052.

In an embodiment of the present invention, by calling program or the instruction of memory 605 storage, processor 601 determines N number of server of the file fragmentation of asking file to be downloaded, generate M burst download request, wherein, any one server in described N number of server at least receives at least one the burst download request in described M burst download request, M burst download request is sent to N number of time source server, wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request, wherein, above-mentioned M and above-mentioned N be greater than 1 positive integer, above-mentioned M is greater than or equal to above-mentioned N, M the burst receiving above-mentioned N number of time source server feedback downloads response, above-mentioned M burst downloads response and above-mentioned M burst download request one_to_one corresponding, above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

In some embodiments of the invention, consider the harmony between N number of time source server, if above-mentioned M is integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of returning the burst download request that source server sends to any one in above-mentioned N number of time source server is less than or equal to k1, wherein, above-mentioned k1 equals the business that above-mentioned M obtains divided by above-mentioned N.So, be conducive to ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.Such as, suppose that M equals 20, N and equals 10, then the quantity of returning to 10 any one of returning in source server the burst download request that source server sends is 2.Suppose that again M equals 10, N equals 10, the quantity of then returning to 10 any one of returning in source server the burst download request that source server sends equals 1, can find out, such restricted number is conducive to ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.

In some embodiments of the invention, consider the harmony between N number of time source server, if above-mentioned M is non-integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of returning the burst download request that source server sends to any one in above-mentioned N number of time source server is less than or equal to k2, and above-mentioned k2 equals the value that rounds up of the business that above-mentioned M obtains divided by above-mentioned N.Be conducive to like this ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.Such as, suppose that M equals 25, N and equals 10, then the quantity of returning to 10 any one of returning in source server the burst download request that source server sends is less than or equal to 3.Suppose that again M equals 15, N equals 10, the quantity of then returning to 10 any one of returning in source server the burst download request that source server sends is less than or equal to 2, can find out, such restricted number is conducive to ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.

In other embodiments of the present invention, consider the harmony between N number of time source server, if above-mentioned M is non-integer divided by the business that above-mentioned N obtains, then among above-mentioned M burst download request, the quantity of returning the burst download request that source server sends to any one in above-mentioned N number of time source server is less than or equal to k2 and is more than or equal to k3, above-mentioned k2 equals the value that rounds up of the business that above-mentioned M obtains divided by above-mentioned N, and what above-mentioned k3 equaled the business that above-mentioned M obtains divided by above-mentioned N rounds value downwards.Be conducive to like this ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.Such as, suppose that M equals 25, N and equals 10, then the quantity of returning to 10 any one of returning in source server the burst download request that source server sends is less than or equal to 3 and is more than or equal to 2.Suppose that again M equals 15, N equals 10, the quantity of then returning to 10 any one of returning in source server the burst download request that source server sends is less than or equal to 2 and is more than or equal to 1, can find out, such restricted number is conducive to ensureing that each server in N number of time source server processes the burst download request of equal number or Similar numbers as far as possible.

In some embodiments of the invention, processor 601 sends M burst download request to N number of time source server and can comprise: by the distributed points (or user terminal or miscellaneous equipment) in content distributing network to N number of time source server transmission M burst download request.

In some embodiments of the invention, processor 601 sends M burst download request to N number of time source server and can comprise: utilize that the M set up with N number of time source server is individual sends M burst download request to above-mentioned N number of time source server concurrent connection.Wherein, M that sets up with N number of time source server if utilize sends M burst download request to above-mentioned N number of time source server concurrent connection, then can realize synchronous to N number of time source server transmission M burst download request.Wherein, for larger data transmission, it is data serial transmission time delay that this parallel mode can make time delay reduce to t/M(t, and M is number of concurrent).

In some embodiments of the invention, M the file fragmentation that above-mentioned M burst download response is carried directly can be carried out buffer memory by processor 601.Or above-mentioned M burst can be downloaded and respond M the file fragmentation carried and carry out combining obtaining complete being fragmented file by processor 601 further.M file fragmentation can carry out combining obtaining complete being fragmented file based on the file fragmentation of M file fragmentation number by processor 601.Wherein, N number of time source server all can obtain this be fragmented file (obtain from buffer memory be fragmented file or from other time source server be fragmented file or miscellaneous equipment obtain be fragmented file), and file can be fragmented carry out burst to this and obtain multiple file fragmentation (as M or more file fragmentation) according to identical sliced fashion, each time source server is to the file fragmentation corresponding to requesting party's feedback request.

Can find out, in the scheme of the present embodiment, processor 601 sends M burst download request to N number of time source server, wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, wherein, any one server in N number of server at least receives at least one the burst download request in M burst download request, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request; M the burst receiving above-mentioned N number of time source server feedback downloads response; Above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Owing to introducing file fragmentation mechanism, requesting party can to the different file fragmentations of multiple times source server request identical file, and be conducive to the parallel downloading realizing different file fragmentation, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

See Fig. 7, the embodiment of the present invention provides a kind of content distribution network system, can comprise:

Distributed points 710 and X time source server 720.

Wherein, distributed points 710, for returning from X the N number of time source server 720 that source server 720 determines the file fragmentation for asking file to be downloaded; Generate M burst download request; Send M burst download request to X the N number of time source server 720 returned among source server 720, M the burst receiving described N number of time source server 720 feedback downloads response; Wherein, any one server in described N number of server at least receives at least one the burst download request in described M burst download request; Each burst download request among described M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among described M burst download request, wherein, described M, described X and described N are positive integer, described M is greater than or equal to described N, and described X is greater than or equal to described N; Described M burst downloads response and described M burst download request one_to_one corresponding, described M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

In some embodiments of the invention, the above-mentioned aspect to N number of time source server transmission M burst download request, distributed points 710 specifically for, utilize that the M set up with N number of time source server is individual sends M burst download request to above-mentioned N number of time source server concurrent connection.Wherein, M that sets up with N number of time source server if utilize sends M burst download request to above-mentioned N number of time source server concurrent connection, then can realize synchronous to N number of time source server transmission M burst download request.Wherein, for larger data transmission, it is data serial transmission time delay that this parallel mode can make time delay reduce to t/M(t, and M is number of concurrent).

In some embodiments of the invention, distributed points 710 also can be used for, and directly above-mentioned M burst download is responded M the file fragmentation carried and carries out buffer memory.Or distributed points 710 also can be used for, further above-mentioned M burst is downloaded and respond M the file fragmentation carried and carry out combining obtaining complete being fragmented file.Wherein, M file fragmentation can be carried out combine obtaining complete being fragmented file based on the file fragmentation of M file fragmentation number.Wherein, N number of time source server all can obtain this be fragmented file (obtain from buffer memory be fragmented file or from other time source server be fragmented file or miscellaneous equipment obtain be fragmented file), and file can be fragmented carry out burst to this and obtain multiple file fragmentation (as M or more file fragmentation) according to identical sliced fashion, each time source server is to the file fragmentation corresponding to requesting party's feedback request.

Can find out, among the scheme of the present embodiment, distributed points sends M burst download request to N number of time source server, wherein, each burst download request among above-mentioned M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among above-mentioned M burst download request; M the burst receiving above-mentioned N number of time source server feedback downloads response; Above-mentioned M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.Owing to introducing file fragmentation mechanism, requesting party can to the different file fragmentations of multiple times source server request identical file, and be conducive to the parallel downloading realizing different file fragmentation, compared to the existing scheme to the whole file of same device request, such scheme is conducive to improving the load-balancing performance of file download and the use reasonability of the network bandwidth.

The embodiment of the present invention also provides a kind of computer-readable storage medium, and wherein, this computer-readable storage medium can have program stored therein, and comprises the part or all of step of the data transmission method recorded in said method embodiment when this program performs.

It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in specification all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.

In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.

In several embodiments that the application provides, should be understood that, disclosed device, the mode by other realizes.Such as, device embodiment described above is only schematic, the such as division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the indirect coupling of device or unit or communication connection can be electrical or other form.

The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed in multiple network element.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.

In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.

If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.

The above, above embodiment only in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.

Fig. 1 is the schematic flow sheet of a kind of data transmission method that the embodiment of the present invention provides;

Fig. 2-a is the schematic flow sheet of the another kind of data transmission method that the embodiment of the present invention provides;

Fig. 2-b is the schematic diagram of the data that provide of embodiment of the present invention Hui Yuan step by step;

Fig. 3 is the schematic flow sheet of the another kind of data transmission method that the embodiment of the present invention provides;

Fig. 4 is the schematic flow sheet of the another kind of data transmission method that the embodiment of the present invention provides;

Fig. 5-a is the schematic diagram of a kind of data transmission device that the embodiment of the present invention provides;

Fig. 5-b is the schematic diagram of the another kind of data transmission device that the embodiment of the present invention provides;

Fig. 6 is the schematic diagram of a kind of distributed points that the embodiment of the present invention provides;

Fig. 7 is the schematic diagram of a kind of content distribution network system that the embodiment of the present invention provides.

Embodiment

The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.

Below be described in detail respectively.

Claims

1. a method for transfer of data, is characterized in that, comprising:

Generate M burst download request;

M the burst receiving described N number of server feedback downloads response;

2. method according to claim 1, it is characterized in that, if described M is integer divided by the business that described N obtains, then among described M burst download request, the quantity of the burst download request sent to any one server in described N number of server is less than or equal to k1, and described k1 equals the business that described M obtains divided by described N.

3. method according to claim 1, it is characterized in that, if described M is non-integer divided by the business that described N obtains, then among described M burst download request, the quantity of the burst download request sent to any one server in described N number of server is less than or equal to k2, and described k2 equals the value that rounds up of the business that described M obtains divided by described N;

Or, if described M is non-integer divided by the business that described N obtains, then among described M burst download request, to the quantity of the burst download request that any one server in described N number of server sends, be less than or equal to k2 and be more than or equal to k3, described k2 equals the value that rounds up of the business that described M obtains divided by described N, and what described k3 equaled the business that described M obtains divided by described N rounds value downwards.

4. method according to claim 1, it is characterized in that, described N number of server is N number of time source server, described to N number of server transmission M burst download request, comprising: send M burst download request by the distributed points in content distributing network to N number of time source server.

5. method according to claim 4, is characterized in that, describedly sends M burst download request to N number of server, comprising: utilize and M that N number of server is set up is individual concurrent connection sends M burst download request to described N number of server.

6. the method according to any one of claim 1 to 5, is characterized in that,

Described method also comprises:

Described M burst is downloaded and responds M the file fragmentation carried and carry out combining obtaining complete being fragmented file.

7. method according to claim 6, is characterized in that, carries the total number M of file fragmentation and described file fragmentation descriptor in the HTTP header field of described M burst download request or abstract syntax notation one agreement header field.

8. method according to claim 7, is characterized in that, described burst is downloaded in the HTTP header field of response or abstract syntax notation one agreement header field and carried this burst and download file fragmentation length information corresponding to file fragmentation entrained by response.

9. a data transmission device, is characterized in that, comprising:

Generation unit, for generating M burst download request;

Transmitting element, for sending M burst download request to N number of server, wherein, any one server in described N number of server at least receives at least one the burst download request in described M burst download request, each burst download request among described M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among described M burst download request, wherein, described M and described N is positive integer, wherein, described M is greater than or equal to described N,

10. device according to claim 9, it is characterized in that, if described M is integer divided by the business that described N obtains, then among described M burst download request, the quantity of the burst download request sent to any one server in described N number of server is less than or equal to k1, and described k1 equals the business that described M obtains divided by described N;

Or, if described M is non-integer divided by the business that described N obtains, then among described M burst download request, the quantity of the burst download request sent to any one server in described N number of server is less than or equal to k2, and described k2 equals the value that rounds up of the business that described M obtains divided by described N;

11. devices according to claim 9, is characterized in that,

Described transmitting element specifically for, utilize that the M set up with N number of server is individual sends M burst download request to described N number of server concurrent connection.

12. devices according to any one of claim 9 to 11, is characterized in that,

Described device also comprises:

Assembled unit, responds M the file fragmentation carried carry out combining obtaining complete being fragmented file for being downloaded described M burst.

13. 1 kinds of content distribution network systems, is characterized in that, comprising:

Distributed points and X time source server;

Wherein, described distributed points, for returning from X the N number of time source server that source server determines the file fragmentation for asking file to be downloaded; Generate M burst download request; Send M burst download request to described X the described N number of time source server returned among source server, any one server in described N number of server at least receives at least one the burst download request in described M burst download request; M the burst receiving described N number of time source server feedback downloads response; Wherein, each burst download request among described M burst download request carries file fragmentation descriptor, the file fragmentation difference described by file fragmentation descriptor entrained by any two burst download requests among described M burst download request, wherein, described M, described X and described N are positive integer, described M is greater than or equal to described N, and described X is greater than or equal to described N; Described M burst downloads response and described M burst download request one_to_one corresponding, described M the burst each burst downloaded among response is downloaded and is responded, and carries and downloads entrained file fragmentation number corresponding file fragmentation described by file fragmentation descriptor in the burst download request corresponding to responding with this burst.

14. content distribution network systems according to claim 13, it is characterized in that, if described M is integer divided by the business that described N obtains, then among described M burst download request, the quantity of returning the burst download request that source server sends to any one in described N number of time source server is less than or equal to k1, and described k1 equals the business that described M obtains divided by described N;

Or, if described M is non-integer divided by the business that described N obtains, then among described M burst download request, the quantity of returning the burst download request that source server sends to any one in described N number of time source server is less than or equal to k2, and described k2 equals the value that rounds up of the business that described M obtains divided by described N;

Or, if described M is non-integer divided by the business that described N obtains, then among described M burst download request, the quantity of the burst download request that source server sends is returned to any one in described N number of time source server, be less than or equal to k2 and be more than or equal to k3, described k2 equals the value that rounds up of the business that described M obtains divided by described N, and what described k3 equaled the business that described M obtains divided by described N rounds value downwards.

15. content distribution network systems according to claim 13 or 14, it is characterized in that, described in N number of time source server transmission M burst download request, described distributed points sends M burst download request to described N number of time source server specifically for the M utilized and described N number of time source server is set up is individual concurrent connection.

16. content distribution network systems according to claim 15, is characterized in that,

Described distributed points also for, described M burst is downloaded and responds M the file fragmentation carried and carry out combining obtaining complete being fragmented file.