CN105144730A - Video transmission method, apparatus and system - Google Patents

Video transmission method, apparatus and system Download PDF

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Publication number
CN105144730A
CN105144730A CN201480000404.9A CN201480000404A CN105144730A CN 105144730 A CN105144730 A CN 105144730A CN 201480000404 A CN201480000404 A CN 201480000404A CN 105144730 A CN105144730 A CN 105144730A
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China
Prior art keywords
server
mpd
load
segment
load information
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Granted
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CN201480000404.9A
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Chinese (zh)
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CN105144730B (en
Inventor
史嫄嫄
夏海涛
乔伟华
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876—Network utilisation, e.g. volume of load or congestion level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/23439—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements for generating different versions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26258—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42684—Client identification by a unique number or address, e.g. serial number, MAC address, socket ID
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/65—Transmission of management data between client and server
    • H04N21/658—Transmission by the client directed to the server
    • H04N21/6581—Reference data, e.g. a movie identifier for ordering a movie or a product identifier in a home shopping application

Abstract

The present invention provides a video transmission method, apparatus and system. The method comprises: a server receives video request information sent by a user equipment (UE), the video request information comprising a UE identifier; the server obtains first load information of a network where the UE is located according to the UE identifier; the server generates a first media segment with a first bit rate and a first media presentation description (MPD) file corresponding to the first segment, the first bit rate matching the first load information; the server sends the first MPD to the UE, so that the UE obtains the first bit rate according to the first MPD; and the server receives segment request information sent by the UE, the segment request information comprising the first bit rate, and sends the first segment to the UE according to the first bit rate. In the present invention, a server prepares media according to real-time load informant of a network where a user is located, so that a media stream is highly matched with the real-time network load information of the user.

Description

Video transmission method, apparatus and system
Technical field
The present invention relates to the communication technology, more particularly to a kind of video transmission method, device and system.
Background technology
3GP-DASH (3GP-Dynamic Adaptive Streaming over HTTP) is third generation partner program (The 3rd Generation Partnership Project, abbreviation：3GPP) propose, so that the agreement of Streaming Media smooth playing when bandwidth fluctuation is larger.Fig. 1 is 3GP-DASH system architecture schematic diagrams, as shown in figure 1,3GP-DASH systems include：3GP-DASH HTTP servers and 3GP-DASH clients, or also include HTTP buffer units.Wherein, HTTP server includes 3GP-DASH content preparation modules, the description of 3GP-DASH media representations（Media Presentation Description, referred to as：MPD) file distribution function module, 3GP-DASH media slicings（Segment) distribution function.
In the prior art, in net cast service（Live Service) when, HTTP
(Hypertext Transfer Protocol, referred to as：HTTP) the 3GP-DASH content preparation modules of server are when source Media Stream is inputted, according to the specified code check of source Media Stream provider, generally with Gigabits per second（Megabits Per Second, referred to as：Mbps) it is unit, such as 20Mbps, 50Mbps, 100Mbps, it is fixed, the coding of different quality rank is carried out to source media stream content, generates the media version of different code checks（Representation), and the media content cutting burst of these different code checks is generated into segment files, generate corresponding MPD file simultaneously, wherein MPD file provides segment detailed description information, including code check, resolution ratio, URL for client（Uniform Resource Locator, referred to as：URL) address, segment time length etc.；Then asked according to the net cast of client, MPD file distribution function sends MPD file to client, so that client obtains Media Resource List according to MPD file, and the segment of matching code check relative with oneself present channel status of available bandwidth and channel status is therefrom selected, segment distribution functions send the segment of its selection to client afterwards.
However, for mobile network, the fluctuation of user's available bandwidth is larger, and existing 3GP-DASH video transmission technologies, HTTP server is supplied to several cbr (constant bit rate)s of subscription client, even if easily existing The Media Stream of user's selection minimum code rate still occurs playing slack problem.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of video transmission method, apparatus and system.
In a first aspect, the embodiment of the present invention provides a kind of video transmission method, including：
Server receives the video request information that user equipment (UE) is sent, and the video request packet is identified containing UE；
The server identifies the first load information for obtaining UE places network according to the UE；First media slicing segment and with first segment corresponding first media representation of the server generation with the first code check describe file MPD, and first code check matches with first load information；
The server sends the first MPD to the UE, so that the UE obtains first code check according to the first MPD；
The server receives the fragment request information that the UE is sent, and the fragment request packet contains first code check, and sends the first segment to the UE according to first code check.
In the first possible implementation of first aspect, the server is sent to the UE after first MPD file, in addition to：
The server identifies the second load information for obtaining UE places network according to the UE；Twoth segment and with twoth segment corresponding twoth MPD of the server generation with the second code check, second code check match with second load information；
The server sends the first segment according to first code check to the UE, including：The server sends the first segment and the 2nd MPD to the UE, so that the UE receives the first segment, and obtains second code check according to the 2nd MPD.
With reference to the first possible implementation of first aspect, in second of possible implementation of first aspect, the server identifies the first load information for obtaining UE places network according to the UE, including：
The server sends the first load requests information to strategy control unit, and the first load requests information is identified including the UE；
The server receives the first load information that the strategy control unit is sent；
The server identifies the second load information for obtaining UE places network, bag according to the UE Include：
The server sends the second load requests information to the strategy control unit, and the second load requests information is identified including the UE；Or, the server sends the message that the first MPD completes to send to the strategy control unit, so that the strategy control unit obtains second load information according to UE marks；
The server receives the second load information that the strategy control unit is sent.
With reference to the first possible implementation of first aspect, in the third possible implementation of first aspect, first media slicing segment and with first segment corresponding first media representation of the server generation with the first code check are described after file MPD, in addition to：
The server sends the first segment and the first MPD to buffer unit;
After the 2nd segment and twoth MPD corresponding with the 2nd segment of the server generation with the second code check, in addition to：
The server sends the 2nd segment and the 2nd MPD to the buffer unit;The server sends the first MPD to the UE, including：
The server sends the first MPD by the buffer unit to the UE;
The server sends the first segment and the 2nd MPD to the UE, including：The server sends the first segment and the 2nd MPD by the buffer unit to the UE.
With reference to the third possible implementation of first aspect, in the 4th kind of possible implementation of first aspect, the server identifies the first load information for obtaining UE places network according to the UE, including：
The server sends the first load requests information to strategy control unit, and the first load requests information is identified including the UE；
The server receives the first load information that the strategy control unit is sent；
The server identifies the second load information for obtaining UE places network according to the UE, including：
The server receives the second load information that the strategy control unit is sent, wherein second load information is the strategy control unit determine that the buffer unit completes to receive the first MPD after, identify what is obtained according to the UE.
Second aspect, the embodiment of the present invention provides a kind of video transmission method, including： The first load requests information that strategy control unit the reception server is sent, UE mark of the first load requests packet containing the user equipment (UE) for sending video information；
The strategy control unit identifies the first load information for obtaining UE places network according to the UE, and sends first load information to the server.
In the first possible implementation of second aspect, the strategy control unit is sent to the server after first load information, in addition to：
The strategy control unit receives the second load requests information that the server is sent, and the second load requests information is identified including the UE；Or, receive the message for the first MPD completion transmissions that the server is sent；
The strategy control unit obtains second load information according to UE marks；
The strategy control unit sends the second load information to the server.
In second of possible implementation of second aspect, the strategy control unit is sent to the server after first load information, in addition to：
The strategy control unit is if it is determined that buffer unit completes to receive the first MPD, then according to UE mark acquisitions second load information；
The strategy control unit sends the second load information to the server.
The third aspect, the embodiment of the present invention provides a kind of video frequency transmitter, including：
Transceiver module, the video request information for receiving user equipment (UE) transmission, the video request packet is identified containing UE；
Acquisition module, the first load information of UE places network is obtained for being identified according to the UE;Media preparation module, describes file MPD, first code check matches with first load information for generating the first media slicing segment and the first media representation corresponding with the first segment with the first code check；
The transceiver module, is additionally operable to send the first MPD to the UE, so that the UE obtains first code check according to the first MPD；
The transceiver module, is additionally operable to receive the fragment request information that the UE is sent, the fragment request packet contains first code check, and sends the first segment to the UE according to first code check.
In the first possible implementation of the third aspect, the acquisition module after the transceiver module sends first MPD file to the UE, is additionally operable to： The second load information of network where obtaining the UE is identified according to the UE；The media preparation module, is additionally operable to twoth segment and with twoth segment corresponding twoth MPD of the generation with the second code check, and second code check matches with second load information；The transceiver module, specifically for：
The first segment and the 2nd MPD is sent to the UE, so that the UE receives the first segment, and second code check is obtained according to the 2nd MPD.
With reference to the first possible implementation of the third aspect, in second of possible implementation of the third aspect, the acquisition module, specifically for：
The first load requests information is sent to strategy control unit, the first load requests information is identified including the UE；
Receive the first load information that the strategy control unit is sent；
The second load requests information is sent to the strategy control unit, the second load requests information is identified including the UE；Or, the message that the first MPD completes to send is sent to the strategy control unit, so that the strategy control unit obtains second load information according to UE marks；
Receive the second load information that the strategy control unit is sent.
With reference to the first possible implementation of the third aspect, in the third possible implementation of the third aspect, in addition to, cache module is used for：
Generated in the media preparation module after the first media slicing segment and the first media representation corresponding with the first segment with the first code check describe file MPD, the first segment and the first MPD is sent to buffer unit;
After the media preparation module generates the 2nd segment and twoth MPD corresponding with the 2nd segment with the second code check, the 2nd segment and the 2nd MPD is sent to the buffer unit;
The transceiver module, specifically for：
First MPD is sent to the UE by the buffer unit;And, the first segment and the 2nd MPD is sent to the UE by the buffer unit.
With reference to the third possible implementation of the third aspect, in the 4th kind of possible implementation of the third aspect, the acquisition module, specifically for：
The first load requests information is sent to strategy control unit, the first load requests information is identified including the UE； Receive the first load information that the strategy control unit is sent；
Receive the second load information that the strategy control unit is sent, wherein second load information is the strategy control unit determine that the buffer unit completes to receive the first MPD after, according to described
UE marks are obtained.
Fourth aspect, the embodiment of the present invention provides a kind of video frequency transmitter, including：
Request receiving module, the first load requests information sent for the reception server, UE mark of the first load requests packet containing the user equipment (UE) for sending video information；
Load acquisition module, for identified according to the UE obtain the UE where network the first load I from,
Sending module is loaded, for sending first load information to the server.
In the first possible implementation of fourth aspect, the request receiving module after the load factor sending module sends first load information to the server, is additionally operable to：
The second load requests information that the server is sent is received, the second load requests information is identified including the UE；Or, receive the message for the first MPD completion transmissions that the server is sent；The load acquisition module, is additionally operable to obtain second load information according to UE marks；The load sending module, is additionally operable to send the second load information to the server.
In second of possible implementation of fourth aspect, the load acquisition module after the load sending module sends first load information to the server, is additionally operable to：
If it is determined that buffer unit completes to receive the first MPD, then second load information is obtained according to UE marks；
The load sending module, is additionally operable to send the second load information to the server.
5th aspect, the embodiment of the present invention provides a kind of server, including：First processor, and the first memory being connected with first processor, the first memory can be used for storing load information, media slicing segment, media representation corresponding with the media slicing segment describes file MPD, and batch processing code, the first processor can perform described program code, to realize that the video transmission method Zhong Walk as any one of first to fourth kind of possible implementation of first aspect and first aspect are rapid.
6th aspect, the embodiment of the present invention provides a kind of strategy control unit, including：Second processor, and the second memory being connected with second processor, the second memory are used to store load information, and batch processing code, and the second processor can perform described program code, to realize second party Video transmission method Zhong Walk in the first to second possible implementation of face and second aspect described in any any one are rapid.
7th aspect, the embodiment of the present invention provides a kind of Video transmission system, including：Server as described in terms of the 5th, strategy control unit and user equipment (UE) client as described in terms of the 6th；Or, including：Server as described in terms of the 5th, the strategy control unit as described in terms of the 6th, buffer unit and user equipment (UE) client.
The present embodiment, asked by server according to user video, the real time load information of network where obtaining user by strategy control unit, and content preparation is carried out according to the real time load information, generation and the segment of the real time load information matches code check, user is selected to match with oneself network load information the segment of code check, realizes the matched of Media Stream and user's real-time network load information, makes full use of UE real-time network bandwidth；And by the way that when segment is sent to user, the corresponding MPD files of the next segment of active push can reduce the network overhead that user's active pull MPD file is brought.
Technical scheme in illustrating in order to illustrate the embodiments of the present invention more clearly, the accompanying drawing used required in being described below to embodiment is briefly introduced, apparently, drawings in the following description are only some embodiments of the present invention, for one of ordinary skill in the art, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is 3GP-DASH system architecture schematic diagrams；
The flow chart for the video transmission method embodiment one that Fig. 2 provides for the present invention；
The flow chart for the video transmission method embodiment two that Fig. 3 provides for the present invention；
The flow chart for the video transmission method embodiment three that Fig. 4 provides for the present invention；
The signaling process figure for the video transmission method example IV that Fig. 5 provides for the present invention；
The signaling process figure for the video transmission method embodiment five that Fig. 6 provides for the present invention；
The structural representation for the video frequency transmitter embodiment one that Fig. 7 provides for the present invention；
The structural representation for the video frequency transmitter embodiment two that Fig. 8 provides for the present invention；
The structural representation for the server example that Fig. 9 provides for the present invention；
The structural representation for the strategy control unit embodiment that Figure 10 provides for the present invention；
The structural representation for the Video transmission system embodiment one that Figure 11 provides for the present invention； The structural representation for the Video transmission system embodiment two that Figure 12 provides for the present invention.
Embodiment is in order that the object, technical solutions and advantages of the present invention are clearer, Zuo Jin mono- Walk of the present invention are described in detail below in conjunction with accompanying drawing, obviously, described embodiment is only embodiment of the invention a part of, rather than whole embodiments.Based on the embodiment in the present invention, all other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
In the prior art, DASH Video Transmission Schemes, in transmission of video, the several cbr (constant bit rate)s specified according to video provider, segment and MPD corresponding with segment with cbr (constant bit rate) are generated to source Media Stream, comprising the several cbr (constant bit rate)s specified in MPD, so that client is selected.But for net cast service, the mobility of user is very big, and the quantity of different period users also differs widely, so that the fluctuation such as network bandwidth of user is larger, using existing DASH Video Transmission Schemes, previously generate the segment with cbr (constant bit rate), the problem of with being delayed larger, and the segment of several cbr (constant bit rate)s can only be provided, there may be user number it is many when play not smooth, the problem of user number can not make full use of the effective network bandwidth of user when few.
The flow chart of video transmission method embodiment one that Fig. 2 provides for the present invention, as shown in Fig. 2 this method embodiment, Bao include Ru Xia Walk it is rapid：
Walk rapid 201, server receive the video request information that user equipment (UE) is sent, and video request packet is identified containing UE, wherein the server, can be HTTP server, and net cast service is provided available for UE clients.
Walk rapid 202, server identify the first load information for obtaining UE places network according to UE.
Wherein, UE marks include but is not limited to international mobile subscriber identity（International Mobile Subscriber Identity, referred to as：), IMSI mobile device international identity code（International Mobile Equipment Identity, referred to as：), IMEI mobile station International Integrated Services digital network（Integrated Services Digital Network, referred to as：ISDN) number (Mobile Station international ISDN number, abbreviation： MSISDN).
The base station side load information and/or core-network side load information of network where load information in the embodiment of the present invention, including UE, wherein, the load information of base station side can include but is not limited to：The number of users that base station side is connected, the size of the currently serviced portfolio in base station, the available bandwidth information of base station side, Physical Resource Block（Physical Resource Block, referred to as：PRB service condition)；The load information of core network side, can include but is not limited to：The current actual user's number of network, i.e., the summation of the portfolio for all base stations service that the summation of the number of users of its all base station side connected, network are currently connected, the disposal ability and storage capacity of core network.First load information, can include first base station load information and/or the first core network load information.When the base station cell that core net is serviced deposit load between cells it is unequal, during the unbalanced situation of the utilization of resources, if any intra-cell users number is less, load is light, and some intra-cell users numbers is more, load weight when, because the business data packet of all users is required for being handled by core net（Such as service quality QoS control, strategy and charging, Route Selection and data forwarding）, in order to which the utilization rate for both improving base station side Radio Resource is better achieved, the treatment effeciency of core net is improved again, can be also contemplated for core network load information while the load information of base station side is considered.
Walk rapid 203, server generation the first media slicing segment and the first media representation corresponding with the first segment with the first code check describe file MPD, and the first code check matches with the first load information；
Wherein, first code check matches with the first load information, refer to the code check value of the first code check and the current network load information match of user, compared with cbr (constant bit rate) value of the prior art, first code check can have the code check value higher than highest cbr (constant bit rate) value, it is possible to have the code check value lower than minimum cbr (constant bit rate) value.If active user's quantity is larger, network load is larger, available bandwidth is smaller, the segment of server generation, the first code check with compared with low bit- rate value, such as, minimum cbr (constant bit rate) value is 20Mbps in the prior art, the code check value of first code check is probably 10Mbps so that active user can be with the smooth playing video；If active user's quantity is smaller, network load is smaller, available bandwidth is larger, the segment of server generation, the first code check with high code rate value, such as, in the prior art, highest cbr (constant bit rate) is 100Mbps, and the code check value of first code check is probably 120Mbps, to make full use of the network bandwidth that user is current so that active user can enjoy more smooth, higher-quality net cast.
It is worth noting that, for multiple users, server can be according to the first load information of all users, it is determined that the maximal rate value of the first code check matched with wherein minimum first load information, and determination and the minimum code rate value of wherein the first code check that the load information of highest first matches, for the first load information with median, statistics classification can be carried out, it is determined that the middle code check value of the first code check matched with the first different classes of load information, such as, can by the median of the first load information by from it is small arrival be divided into 8 classes greatly, then server correspondingly generates the first segment with 8 different middle code check values, specific statistics is sorted out, this is not limited by the present invention. Walk rapid 204, server send the first MPD to UE, so that UE obtains the first code check according to the first MPD；
Wherein, first MPD includes the maximal rate value by the first code check, the minimum code rate value of first code check, and the first code check collection of the middle code check value composition of multiple first code checks, different UE are concentrated from first code check, first code check with the code check value matched the most with itself the first load information is obtained.
Walk rapid 205, server receive the fragment request information that UE is sent, and fragment request packet contains the first code check, and sends the first segment to UE according to first code check.
Wherein, if the first code check that fragment request packet contains is the minimum value of the first code check, the first segment with minimum code rate value is sent to UE according to the minimum value of first code check.
Preferably , Walk rapid 204, server is sent to UE after the first MPD file, in addition to：Server identifies the second load information for obtaining UE places network according to UE；
Server twoth segment and with twoth segment corresponding twoth MPD of the generation with the second code check, the second code check match with the second load information；
Server sends the first segment according to the first code check to UE, including：
Server sends the first segment and the 2nd MPD to UE, so that UE receives the first segment, and obtains the second code check according to the 2nd MPD.
In Jin mono- Walk Di , Walk rapid 202, server identifies the first load information for obtaining UE places network according to UE, including：Server sends the first load requests information to strategy control unit, and the first load requests information includes UE marks, the wherein strategy control unit, can be but be not limited to existing strategy and charging regulation function entity positioned at core-network side（Policy and Charging Rule Function, referred to as： PCRF);Server receives the first load information that strategy control unit is sent, and obtains from the first load information the first load information,
Server obtains the second load information, including two ways：The first, server uses rapid Si Walk with the first load information Xiang of acquisition, by sending the second load requests information to strategy control unit, and receives the second load information of strategy control unit transmission, specifically repeats no more；Second, server sends the message that the first MPD completes to send to strategy control unit, so that strategy control unit is after it is determined that the first MPD completed transmission, adjudicate the first load information invalid, second load information is obtained according to UE marks, and the second load information is returned to server, server receives second load information that strategy control unit is sent. It should be noted that, server of the present invention according to the real time load information generation of network where UE except that can have matching code checksegmenOutside t, can also have the segment of matching length, resolution ratio and code stream number, or the segment matched after above-mentioned parameter combination according to the generation of real time load information, this is not limited by the present invention.
Specifically, server is when providing net cast service, after the video playback for receiving UE is asked, the first load information that UE present access networks are obtained by strategy control unit is identified according to UE, first load information includes base station side load information and/or core-network side load information, first segment of the generation with the first code check matched with the first load information, and send the first MPD file corresponding with the segment to user, user is allowd to obtain the code check with itself current network load information match from the first MPD, and send media slicing request to server.Server is after the first MPD is sent, second load information is obtained according to UE marks, to generate the 2nd segment and corresponding 2nd MPD of the second code check matched with the second load information, and while a segment is sent to UE, send the 2nd MPD, so that user is while a segment is cached, second code check is obtained according to the 2nd MPD, and send the 2nd segment solicited message, the like, while segment is sent to UE, the corresponding MPD files of the next segment of active push, until video playback terminates, or UE actively stops video request.
In the prior art, DASH video transmission technologies, are that the mode based on subscription client active pull obtains newest suitable video content.Net cast service for including the minimum update cycles (minimumUpdatePeriodMPD) of parameter MPD, client is taken the initiative control strategy, is constantly periodically pulled and is examined more newly arriving for Check MPD files the relevant information of new media slicing is obtained according to own channel status request.But, this acquisition of information based on client drive pattern, client frequently arrives server end and pulls MPD file and carry out local inspection Check and renewal, there is the problem of eating dishes without rice or wine to interact, and excessive interaction of eating dishes without rice or wine easily brings time delay, can also increase network overhead.
The present embodiment, asked by server according to user video, the real time load information of network where obtaining user by strategy control unit, and content preparation is carried out according to the real time load information, generation and the segment of the real time load information matches code check, user is selected to match with oneself network load information the segment of code check, realizes the matched of Media Stream and user's real-time network load information, makes full use of UE real-time network bandwidth；And by the way that when segment is sent to user, the corresponding MPD files of the next segment of active push can reduce the network overhead that user's active pull MPD file is brought. The flow chart for the video transmission method embodiment two that Fig. 3 provides for the present invention, this method embodiment is on the basis of embodiment of the method shown in Fig. 2, server uses a kind of preferred embodiment for being located at the buffer unit of core-network side to UE transmissions segment and MPD, and the wherein buffer unit includes but is not limited to content distributing network（Content Delivery Network, referred to as：CDN) buffer unit.As shown in Fig. 3, this method embodiment, it is rapid that Bao includes Ru Xia Walk：
Walk rapid 301, server send the first the first MPD of segment standing grain mouthful after the first media slicing segment of the generation with the first code check and the first media representation corresponding with the first segment describe file MPD to buffer unit;
Walk rapid 302, server send the first MPD by buffer unit to UE;
Walk rapid 303, server send the 2nd segment and the 2nd MPD after the 2nd segment and twoth MPD corresponding with the 2nd segment of the generation with the second code check to buffer unit;
Walk rapid 304, server send the first segment and the 2nd MPD by buffer unit to UE.Jin mono- Walk, in this embodiment, the process that server obtains the first load information is identical with embodiment of the method shown in Fig. 2, specifically repeats no more.
Server identifies the second load information for obtaining UE places network according to UE, including：
Server receive strategy control unit send the second load information, wherein the second load information be strategy control unit determine buffer unit complete receive the first MPD after, according to UE identify obtain.
Specifically, when server uses buffer unit to UE transmission MPD and segment, strategy control unit is it is determined that after the first MPD of buffer unit completion reception, then actively identified according to UE, next load information of network where obtaining UE, that is the second load information, and actively report the load information to server, so that server generates the 2nd segment and corresponding 2nd MPD with the second code check according to the load information, wherein strategy control unit determines that buffer unit completes to receive the first MPD mode, includes but is not limited to：The first, strategy control unit is detected to the reception state of buffer unit, when detecting buffer unit received first MPD files, it is determined that buffer unit completes to receive the first MPD;Second, receive strategy and charging execution function entity（Policy and Charging Enforcement Function, referred to as：PCEF the buffer unit) reported has completed the message of the first MPD receptions, then determine that buffer unit completes to receive the first MPD, wherein, before PCEF is reported, buffer unit will receive the Segment Media Streams and MPD this reporting events of server transmission to PCEF;The third, the first MPD that order caching unit is directly reported completes the message received, it is determined that buffer unit completes to receive the first MPD. This method embodiment, sends segment and MPD, Ke Jin mono- Walk to UE using buffer unit by server and improves video transmission efficiency.
The flow chart of video transmission method embodiment three that Fig. 4 provides for the present invention, as shown in figure 4, this method embodiment Bao include Ru Xia Walk it is rapid：
The first load requests information that Walk rapid 401, strategy control unit the reception server are sent, UE mark of the first load requests packet containing the user equipment (UE) for sending video information；
Walk rapid 402, strategy control unit identify the first load information for obtaining UE places network according to UE, and send the first load information to server.
Jin mono- Walk, strategy control unit is sent to server after the first load information, in addition to：Strategy control unit the reception server sends the second load requests information sent after the first MPD, and the second load requests information is identified including UE；Or, the first MPD that the reception server is sent completes the message sent；
Strategy control unit obtains the second load information according to UE marks；
Strategy control unit sends the second load information to server.
Preferably, after strategy control unit sends the first load information to server, in addition to：Strategy control unit is if it is determined that buffer unit completion reception the first MPD, then obtain the second load information, the wherein buffer unit according to UE marks, can be located at core-network side, include but is not limited to
CDN buffer units；
Strategy control unit sends the second load information to server.
Specifically, strategy control unit is received after the load requests information of server transmission, the base station of network where the UE mark triggerings UE included according to load requests information includes but is not limited to base station to strategy control unit reporting base station load information and is currently accessed number, current traffic, user number, cell available bandwidth, PRB service condition etc., strategy control unit receive UE where the base station load information that reports of base station after, the load information of current core net is obtained simultaneously, if it is unequal to there is cell load in core net, the unbalanced situation of the utilization of resources, then core network load information is together carried as the first load information and is sent to server in the first load response message, so that server is according to base station side load information and/or core network load information, if the first segmen strategy control units for generating the first code check matched with the first load information of network where UE receive the second load requests of server transmission or receive the message that the first MPD completions of server transmission are sent, then obtain the second load information, and return to the second load information to server. If server sends MPD and segment by the buffer unit of core-network side to UE, then strategy control unit determines whether buffer unit has completed the first MPD receptions first, if it is determined that completing to receive the load information of then active obtaining subsequent time for the first MPD, that is the second load information, and report server.Specifically, strategy control unit can be detected by the MPD reception states to buffer unit, received if detecting the first MPD, it is determined that the MPD of buffer unit the first completes to receive；Or buffer unit will receive the Segment Media Streams and MPD this reporting events of server transmission to PCEF, PCEF Zai Jin mono- Walk report strategy control unit, thus strategy control unit determines that buffer unit completes the first MPD reception, so as to which strategy control unit triggers base station, subscribe to the base station load information of request subsequent time, and/or obtain the core network load information of subsequent time, namely the second load information；Or the message that the first MPD file completes to receive directly is reported strategy control unit by buffer unit, so that strategy control unit determines that buffer unit completes the first MPD reception.
The embodiment, the base station side load information and core network load information of network where obtaining UE by strategy control unit, and base station side load information and/or core network load information are sent to server according to the load requests information of server, server is allowd to obtain UE real time load information, and content preparation is carried out according to the real time load information, so as to generate the segment having with the real time load information matches code check, realize the Media Stream of UE side joints receipts and UE real time load information matched, UE real-time network bandwidth can be made full use of.
It is worth noting that, the technical scheme of video transmission method provided by the present invention, is readily applicable to other kinds of wireless network, such as WLAN（Wireless Local Area Networks, referred to as：WLAN), now load information, can be wireless network load information.
The technical method of video transmission method provided by the present invention can be applicable to other types of service that MPD files need to update, such as on-demand content inserts new advertisement, new notice, while Media Stream is sent, more new content is sent, with the network overhead for reducing user's active obtaining to update and bringing.
Illustrate the video transmission method that the present invention is provided with reference to two specific embodiments.
The signaling process figure for the video transmission method example IV that Fig. 5 provides for the present invention, this method embodiment is directed to the scene for directly sending segment and MPD to UE from server, illustrated so that strategy control unit is PCRF as an example, as shown in Figure 5, this method embodiment, it is rapid that Bao includes Ru Xia Walk：
Walk rapid 501, UE send transmission of video request to server, and the transmission of video request bag is identified containing UE；
Walk rapid 502, server send the first load requests information, the first load requests information to PCRF Include UE marks；
Walk rapid 503, PCRF are to the wireless access network where UE（Radio Access Network, referred to as：RAN request first base station load information) is subscribed to, wherein, the wireless access network is mainly base station, including but not limited to base station（NodeB), radio network controller（Radio Network Controller, referred to as：) and evolution system base station RNC（Evolved NodeB, referred to as： eNodeB );
Walk rapid 504, RAN return to first base station load information to PCRF, and the first base station load information includes but is not limited to load of base station, is currently accessed number of users, and cell available bandwidth；
The packet data gateway of Walk rapid 505, PCRF from core-network side（Public Data NetWork Gateway, referred to as：P-GW) place obtains the first core network load information；
Walk rapid 506, PCRF send the first load information to server, and first load information includes above-mentioned first base station load information and/or the first core network load information；
The first segment and the first MPD for the first code check that Walk rapid 507, server generation match with the first load information, it wherein may include multiple the first different code check values in first code check so that the first code check value that different UE selections are most matched with oneself present channel；
Walk rapid 508, server send the first MPD to UE, and the first MPD includes the first code check；Walk rapid 509, UE parse the first MPD, and the first code check value matched with own channel is obtained from the first code check；
Walk rapid 510, UE send media slicing request according to the first code check value to server；
Walk rapid 511, bag include the rapid 511a of Walk, server and send the second load requests information to PCRF, and the second load requests information is identified including UE；Or 511b, server send the message that the first MPD completes to send to PCRF；
The rapid rapid 503-506 of 515 , Tong Walk of the rapid 512- Walk of Walk, are specifically repeated no more.
The 2nd segment and the 2nd MPD for the second code check that Walk rapid 516, server generation match with the second load information, it wherein may include multiple the second different code check values in second code check so that the second code check value that different UE selections are most matched with oneself present channel；
Walk rapid 517, server send the first segment and the 2nd MPD with the first code check value to UE, and the 2nd MPD includes the second code check；
Walk rapid 518, UE play the first segment with the first code check value in caching, and parse the 2nd MPD, and the second code check value matched with own channel is obtained from the second code check；
Walk rapid 519, UE send media slicing request according to the second code check value. By that analogy after , Walk rapid 519, the rapid 511-518 of the multiple Zhi Hang Walk of Chong, until video playback terminates, during transmission video, if server detects some UE and stops media slicing request, stop to the newly-generated MPD file of UE transmissions and segment.
It should be noted that, the rapid 511-515 Yu Walk rapid 510 of Qi Zhong Walk can be while progress , can also rapid 510 execution of the rapid 511-515 Xian Yu Walk of Shi Walk.
This method embodiment, the real time load information of UE places network is obtained from PCRF by server, and content preparation is carried out according to the real time load information, generation and the segment of the real time load information matches code check, user is selected to match with oneself network load information the segment of code check, the matched of Media Stream and user's real-time network load information is realized, UE real-time network bandwidth is made full use of；And by user send segment when, the corresponding MPD files of the next segment of active push, the network overhead that can be brought with user's active pull MPD file.
The signaling process figure for the video transmission method embodiment five that Fig. 6 provides for the present invention, this method embodiment is directed to the scene for sending segment and MPD to UE by buffer unit from server, illustrated so that buffer unit is CDN buffer units and strategy control unit is PCRF as an example, for other kinds of buffer unit, it is achieved in that similar, specifically repeats no more, as shown in Figure 6, this method embodiment, it is rapid that Bao includes Ru Xia Walk：
Walk rapid 601, UE send transmission of video request to server, and the transmission of video request bag is identified containing UE；
Walk rapid 602, server send the first load requests information to PCRF, and the first load requests packet is identified containing UE；
Walk rapid 603, PCRF subscribe to request first base station load information to the RAN where UE, wherein, the RAN is mainly base station, including but not limited to NodeB, RNC and eNodeB, repeats no more.
Walk rapid 604, RAN return to first base station load information to PCRF, and the first base station load information includes but is not limited to load of base station, is currently accessed number of users, and cell available bandwidth；
Walk rapid 605, PCRF obtain the first core network load information at the P-GW of core-network side；Walk rapid 606, PCRF send the first load information to server, and first load information includes above-mentioned first base station load information and/or the first core network load information；
The first segment and the first MPD for the first code check that Walk rapid 607, server generation match with the first load information, it wherein may include multiple the first different code check values in first code check so that the first code check value that different UE selections are most matched with oneself present channel； Walk rapid 608, server send the first segment and the first MPD to the CDN buffer units positioned at core-network side;
Walk rapid 609, buffer unit send the first MPD to UE, and the first MPD includes the first code check；Walk rapid 610, PCRF are if it is determined that CDN buffer units completion the first MPD of reception, then hold row Walk rapid
611；
Walk rapid 611, PCRF subscribe to request first base station load information to the RAN where UE；Walk rapid 612, UE parse the first MPD, and the first code check value matched with own channel is obtained from the first code check；
Walk rapid 613, UE send media slicing request according to the first code check value to server；
Walk rapid 614, RAN return to the second base station load information to PCRF；
Walk rapid 615, PCRF obtain the second core network load information at the P-GW of core-network side；Walk rapid 616, PCRF send the second load information to server, and second load information includes above-mentioned second base station load information and/or the second core network load information；
The 2nd segment and the 2nd MPD for the second code check that Walk rapid 617, server generation match with the second load information, wherein may include multiple the second different code check values so that different in second code check
The second code check value that UE selections are most matched with oneself present channel；
Walk rapid 618, server send the 2nd segment and the 2nd MPD to the CDN buffer units positioned at core-network side;
There is the first segment and the 2nd MPD of the first code check value, the 2nd MPD to include the second code check to UE for Walk rapid 619, CDN buffer units；
Walk rapid 620, UE play the first segment with the first code check value in caching, and parse the 2nd MPD, and the second code check value matched with own channel is obtained from the second code check；
Walk rapid 621, UE send media slicing request according to the second code check value.
By that analogy after , Walk rapid 621, the rapid 610-620 of the multiple Zhi Hang Walk of Chong, until video playback terminates, during transmission video, if CDN buffer units detect some UE and stop media slicing request, stop to the newly-generated MPD file of UE transmissions and segment.
It should be noted that, the rapid rapid 612-613 of 614-616 Yu Walk of Qi Zhong Walk can be while progress , can also the rapid 612-613 execution of the rapid 614-616 Xian Yu Walk of Shi Walk.
This method embodiment, on the basis of embodiment of the method shown in Fig. 5, the efficiency that segment and MPD, Jin mono- Walk improves transmission of video is sent by server using buffer unit to UE. The structural representation for the video frequency transmitter embodiment one that Fig. 7 provides for the present invention, as shown in fig. 7, the video frequency transmitter 700 includes：Transceiver module 701, acquisition module 702, media preparation module 703, wherein,
Transceiver module 701, the video request information for receiving user equipment (UE) transmission, video request packet is identified containing UE；
Acquisition module 702, the first load information of UE places network is obtained for being identified according to UE；Media preparation module 703, for generating the first segment and first MPD corresponding with the first segment with the first code check, the first code check matches with the first load information；
Transceiver module 701, is additionally operable to send the first MPD to UE, so that UE obtains the first code check according to the first MPD；
Transceiver module 701, is additionally operable to receive the fragment request information that UE is sent, fragment request packet contains the first code check, and sends the first segment to UE according to the first code check.
Preferably, acquisition module 702, after transceiver module 701 sends the first MPD file to UE, are additionally operable to：
The second load information of network where obtaining UE is identified according to UE；
Media preparation module 703, is additionally operable to twoth segment and with twoth segment corresponding twoth MPD of the generation with the second code check, and the second code check matches with the second load information；
Correspondingly, transceiver module 701, specifically for：
The first segment and the 2nd MPD is sent to UE, so that UE receives the first segment, and the second code check is obtained according to the 2nd MPD.
Jin mono- Walk, acquisition module 702, specifically for：
The first load requests information is sent to strategy control unit, the first load requests information is identified including UE；
Receive the first load information that strategy control unit is sent；
The second load requests information is sent to strategy control unit, the second load requests information is identified including UE；Or, the message that the first MPD completes to send is sent to strategy control unit, so that strategy control unit obtains the second load information according to UE marks；
Receive the second load information that strategy control unit is sent.
Preferably, the video frequency transmitter 700, in addition to, cache module 704 is used for：
The first segment with the first code check is generated in media preparation module 703 and with first After corresponding first MPD of segment, the first segment and the first MPD is sent to buffer unit;After media preparation module 703 generates the 2nd segment and twoth MPD corresponding with the 2nd segment with the second code check, the 2nd segment and the 2nd MPD is sent to buffer unit;Correspondingly, transceiver module 701, specifically for：
First MPD is sent to UE by buffer unit;And, the first segment and the 2nd MPD is sent to UE by buffer unit.
Correspondingly, acquisition module 702, specifically for：
The first load requests information is sent to strategy control unit, the first load requests information is identified including UE；
Receive the first load information that strategy control unit is sent；
Receive strategy control unit send the second load information, wherein the second load information be strategy control unit determine buffer unit complete receive the first MPD after, according to UE identify obtain.
The video frequency transmitter of the embodiment, available for technical scheme in the embodiment of the method performed shown in Fig. 2 or Fig. 3, its realization principle is similar with having the technical effect that, specifically repeats no more.
The structural representation for the video frequency transmitter embodiment two that Fig. 8 provides for the present invention, as shown in figure 8, the video frequency transmitter 800, including：Request receiving module 801, load acquisition module 802, load sending module 803, wherein,
Request receiving module 801, the first load requests information sent for the reception server, UE mark of the first load requests packet containing the user equipment (UE) for sending video information；
Acquisition module 802 is loaded, the first load information of UE places network is obtained for being identified according to UE, sending module 803 is loaded, for sending the first load information to server.
Jin mono- Walk, request receiving module 801 after load factor sending module sends the first load information to server, is additionally operable to：
The second load requests information that the reception server is sent, the second load requests information is identified including UE;Or, the first MPD that the reception server is sent completes the message sent；
Acquisition module 802 is loaded, is additionally operable to obtain the second load information according to UE marks；
Sending module 803 is loaded, is additionally operable to send the second load information to server.
Preferably, acquisition module 802 is loaded, after load sending module 803 sends media the first load information of preparation module to server, is additionally operable to：
If it is determined that buffer unit completes to receive the first MPD, then the second load information is obtained according to UE marks； Sending module 803 is loaded, is additionally operable to send the second load information to server.
The video frequency transmitter that the embodiment is provided, can be used for performing the technical scheme in the embodiment of the method shown in Fig. 4, its implementing principle and technical effect is similar, specifically repeats no more.
The structural representation for the server example that Fig. 9 provides for the present invention, as shown in Figure 9, the server 900, including first processor 901, and the first memory 902 being connected with first processor 901, wherein, first memory 902 can be used for storing load information, segment, MPD file corresponding with the segment, and batch processing code, the first processor 901 can perform this group of program code, to realize the technical scheme in the video transmission method embodiment shown in Fig. 2 or Fig. 3, its realization principle is similar with having the technical effect that, specifically repeat no more.
The structural representation for the strategy control unit embodiment that Figure 10 provides for the present invention, as shown in Figure 10, the strategy control unit 1000, including：Second processor 1001, and the second memory 1002 being connected with second processor 1001, wherein, second memory 1002 can be used for storage load information and batch processing code, the second processor 1001 can perform this group of program code, to realize the technical scheme in the video transmission method embodiment shown in Fig. 4, its realization principle is similar with having the technical effect that, specifically repeats no more.
The structural representation for the Video transmission system embodiment one that Figure 11 provides for the present invention, as shown in figure 11, the Video transmission system 1100, including：Server 1101, strategy control unit 1102 and at least one user equipment (UE) client 1103, wherein, server 1101 can be that the server shown in Fig. 9 can be used for performing the technical scheme in the embodiment of the method shown in Fig. 2, strategy control unit can be that the strategy control unit shown in Figure 10 can be used for performing the technical scheme in the embodiment of the method shown in Fig. 4, its implementing principle and technical effect is similar, specifically repeats no more.
The structural representation for the Video transmission system embodiment two that Figure 12 provides for the present invention, as shown in figure 12, the Video transmission system 1200, including：Server 1201, strategy control unit 1202, at least one user equipment (UE) client 1203 and buffer unit 1204, wherein, server 1201 can be that the server shown in Fig. 9 can be used for performing the technical scheme in the embodiment of the method shown in Fig. 3, strategy control unit can be that the strategy control unit shown in Figure 10 can be used for performing the technical scheme in the embodiment of the method shown in Fig. 4, can be the PCRF positioned at core-network side, but not limited to this, buffer unit 1204 can be the CDN buffer units positioned at core-network side, but not limited to this, its implementing principle and technical effect is similar, specifically repeat no more.
Through the above description of the embodiments, it is apparent to those skilled in the art that originally Invention can be realized with hardware, or firmware is realized, or combinations thereof mode is realized.When implemented in software, above-mentioned functions can be stored in computer-readable medium or be transmitted as one or more instructions on computer-readable medium or code.Computer-readable medium includes computer-readable storage medium and communication media, and wherein communication media includes being easy to any medium that computer program is transmitted from a place to another place.Storage medium can be any usable medium that computer can be accessed.As example but it is not limited to：Computer-readable medium can include RAM, ROM, EEPROM, CD-ROM or other optical disc storages, magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or store with instruct or data structure form desired program code and can by computer access any other medium.In addition.Any connection can be suitably turn into computer-readable medium.If for example, software is to use coaxial cable, optical fiber cable, twisted-pair feeder, Digital Subscriber Line（) or such as wireless technology of infrared ray, radio and microwave etc is transmitted from website, server or other remote sources DSL, then the wireless technology of coaxial cable, optical fiber cable, twisted-pair feeder, DSL or such as infrared ray, wireless and microwave etc be included in belonging to medium it is fixing in.As used in the present invention, disk（) and dish Disk（Disc compression laser disc) is included（CD), laser disc, laser disc, Digital Versatile Disc（DVD), floppy disk and Blu-ray Disc, the replicate data of the usual magnetic of which disk, and dish is then with laser come optical replicate data.Above combination above should also be as being included within the protection domain of computer-readable medium.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although the present invention is described in detail with reference to foregoing embodiments, it will be understood by those within the art that：It can still modify to the technical scheme described in foregoing embodiments, or carry out equivalent substitution to which part or all technical characteristic；And these modifications or replacement, the essence of appropriate technical solution is departed from the scope of various embodiments of the present invention technical scheme.

Claims (18)

  1. Claims
    1st, a kind of video transmission method, it is characterised in that including：
    Server receives the video request information that user equipment (UE) is sent, and the video request packet is identified containing UE；
    The server identifies the first load information for obtaining UE places network according to the UE；First media slicing segment and with first segment corresponding first media representation of the server generation with the first code check describe file MPD, and first code check matches with first load information；
    The server sends the first MPD to the UE, so that the UE obtains first code check according to the first MPD；
    The server receives the fragment request information that the UE is sent, and the fragment request packet contains first code check, and sends the first segment to the UE according to first code check.
    2nd, according to the method described in claim 1, it is characterised in that the server is sent to the UE after first MPD file, in addition to：
    The server identifies the second load information for obtaining UE places network according to the UE；Twoth segment and with twoth segment corresponding twoth MPD of the server generation with the second code check, second code check match with second load information；
    The server sends the first segment according to first code check to the UE, including：The server sends the first segment and the 2nd MPD to the UE, so that the UE receives the first segment, and obtains second code check according to the 2nd MPD.
    3rd, method according to claim 2, it is characterised in that the server identifies the first load information for obtaining UE places network according to the UE, including：
    The server sends the first load requests information to strategy control unit, and the first load requests information is identified including the UE；
    The server receives the first load information that the strategy control unit is sent；
    The server identifies the second load information for obtaining UE places network according to the UE, including：
    The server sends the second load requests information to the strategy control unit, and the second load requests information is identified including the UE；Or, the server sends the message that the first MPD completes to send to the strategy control unit, so that the strategy control unit is according to being obtained UE marks Second load information；
    The server receives the second load information that the strategy control unit is sent.
    4th, method according to claim 2, it is characterised in that first media slicing segment and with first segment corresponding first media representation of the server generation with the first code check are described after file MPD, in addition to：
    The server sends the first segment and the first MPD to buffer unit;
    After the 2nd segment and twoth MPD corresponding with the 2nd segment of the server generation with the second code check, in addition to：
    The server sends the 2nd segment and the 2nd MPD to the buffer unit;The server sends the first MPD to the UE, including：
    The server sends the first MPD by the buffer unit to the UE;
    The server sends the first segment and the 2nd MPD to the UE, including：The server sends the first segment and the 2nd MPD by the buffer unit to the UE.
    5th, method according to claim 4, it is characterised in that the server identifies the first load information for obtaining UE places network according to the UE, including：
    The server sends the first load requests information to strategy control unit, and the first load requests information is identified including the UE；
    The server receives the first load information that the strategy control unit is sent；
    The server identifies the second load information for obtaining UE places network according to the UE, including：
    The server receives the second load information that the strategy control unit is sent, wherein second load information is the strategy control unit determine that the buffer unit completes to receive the first MPD after, identify what is obtained according to the UE.
    6th, a kind of video transmission method, it is characterised in that including：
    The first load requests information that strategy control unit the reception server is sent, UE mark of the first load requests packet containing the user equipment (UE) for sending video information；
    The strategy control unit identifies the first load information for obtaining UE places network according to the UE, and sends first load information to the server.
    7th, method according to claim 6, it is characterised in that the strategy control unit is to described Server is sent after first load information, in addition to：
    The strategy control unit receives the second load requests information that the server is sent, and the second load requests information is identified including the UE；Or, receive the message for the first MPD completion transmissions that the server is sent；
    The strategy control unit obtains second load information according to UE marks；
    The strategy control unit sends the second load information to the server.
    8th, method according to claim 6, it is characterised in that the strategy control unit is sent to the server after first load information, in addition to：
    The strategy control unit is if it is determined that buffer unit completes to receive the first MPD, then according to UE mark acquisitions second load information；
    The strategy control unit sends the second load information to the server.
    9th, a kind of video frequency transmitter, it is characterised in that including：
    Transceiver module, the video request information for receiving user equipment (UE) transmission, the video request packet is identified containing UE；
    Acquisition module, the first load information of UE places network is obtained for being identified according to the UE;Media preparation module, describes file MPD, first code check matches with first load information for generating the first media slicing segment and the first media representation corresponding with the first segment with the first code check；
    The transceiver module, is additionally operable to send the first MPD to the UE, so that the UE obtains first code check according to the first MPD；
    The transceiver module, is additionally operable to receive the fragment request information that the UE is sent, the fragment request packet contains first code check, and sends the first segment to the UE according to first code check.
    10th, device according to claim 9, it is characterised in that the acquisition module, after the transceiver module sends first MPD file to the UE, is additionally operable to：
    The second load information of network where obtaining the UE is identified according to the UE；
    The media preparation module, is additionally operable to twoth segment and with twoth segment corresponding twoth MPD of the generation with the second code check, and second code check matches with second load information；The transceiver module, specifically for：
    The first segment and the 2nd MPD is sent to the UE, so that the UE connects The first segment is received, and second code check is obtained according to the 2nd MPD.
    11st, device according to claim 10, it is characterised in that the acquisition module, specifically for：
    The first load requests information is sent to strategy control unit, the first load requests information is identified including the UE；
    Receive the first load information that the strategy control unit is sent；
    The second load requests information is sent to the strategy control unit, the second load requests information is identified including the UE；Or, the message that the first MPD completes to send is sent to the strategy control unit, so that the strategy control unit obtains second load information according to UE marks；
    Receive the second load information that the strategy control unit is sent.
    12nd, device according to claim 10, it is characterised in that also include, cache module is used for：
    Generated in the media preparation module after the first media slicing segment and the first media representation corresponding with the first segment with the first code check describe file MPD, the first segment and the first MPD is sent to buffer unit;
    After the media preparation module generates the 2nd segment and twoth MPD corresponding with the 2nd segment with the second code check, the 2nd segment and the 2nd MPD is sent to the buffer unit;
    The transceiver module, specifically for：
    First MPD is sent to the UE by the buffer unit;And, the first segment and the 2nd MPD is sent to the UE by the buffer unit.
    13rd, device according to claim 12, it is characterised in that the acquisition module, specifically for：
    The first load requests information is sent to strategy control unit, the first load requests information is identified including the UE；
    Receive the first load information that the strategy control unit is sent；
    Receive the second load information that the strategy control unit is sent, wherein second load information is the strategy control unit determine that the buffer unit completes to receive the first MPD after, identify what is obtained according to the UE.
    14th, a kind of video frequency transmitter, it is characterised in that including： Request receiving module, the first load requests information sent for the reception server, UE mark of the first load requests packet containing the user equipment (UE) for sending video information；
    Load acquisition module, for identified according to the UE obtain the UE where network the first load I from,
    Sending module is loaded, for sending first load information to the server.
    15th, device according to claim 14, it is characterised in that the request receiving module, after the load factor sending module sends first load information to the server, is additionally operable to：The second load requests information that the server is sent is received, the second load requests information is identified including the UE；Or, receive the message for the first MPD completion transmissions that the server is sent；The load acquisition module, is additionally operable to obtain second load information according to UE marks；The load sending module, is additionally operable to send the second load information to the server, second load information includes second load information.
    16th, device according to claim 14, it is characterised in that the load acquisition module, after the load sending module sends first load information to the server, is additionally operable to：
    If it is determined that buffer unit completes to receive the first MPD, then second load information is obtained according to UE marks；
    The load sending module, is additionally operable to send the second load information to the server.
    17th, a kind of server, it is characterised in that including：First processor, and the first memory being connected with first processor, the first memory can be used for storing load information, media slicing segment, media representation corresponding with the media slicing segment describes file MPD, and batch processing code, the first processor can perform described program code, to realize that the video transmission method Zhong Walk described in claim any one of 1-5 are rapid.
    18th, a kind of strategy control unit, it is characterised in that including：Second processor, and the second memory being connected with second processor, the second memory is used to store load information, and batch processing code, the second processor can perform described program code, to realize that the video transmission method Zhong Walk described in claim any one of 6-8 are rapid.
    19th, a kind of Video transmission system, it is characterised in that including：Server as claimed in claim 17, strategy control unit and user equipment (UE) client as claimed in claim 18；Or, including：Server as claimed in claim 17, strategy control unit as claimed in claim 18, buffer unit and user equipment (UE) client.
CN201480000404.9A 2014-03-27 2014-03-27 Video transmission method, device and system Active CN105144730B (en)

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