CN105144730B - Video transmission method, device and system - Google Patents

Video transmission method, device and system Download PDF

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Publication number
CN105144730B
CN105144730B CN201480000404.9A CN201480000404A CN105144730B CN 105144730 B CN105144730 B CN 105144730B CN 201480000404 A CN201480000404 A CN 201480000404A CN 105144730 B CN105144730 B CN 105144730B
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mpd
server
segment
load
load information
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CN105144730A (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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    • 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 or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream 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 or manipulating encoded video stream 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Environmental & Geological Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Databases & Information Systems (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention provides a kind of video transmission method, apparatus and system, and this method includes：Server receives the video request information that user equipment (UE) is sent, and video request information is identified comprising UE；Server identifies the first load information for obtaining UE places network according to 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 the first code check matches with the first load information；Server sends the first MPD to UE, so that UE obtains the first code check according to the first MPD；Server receives the fragment request information that UE is sent, and fragment request information includes the first code check, and sends the first segment to UE according to the first code check.The present invention carries out media preparation, realizes the matched of Media Stream and user's real-time network load information by the real time load information of server network according to where user.

Description

Video transmission method, device and system
Technical Field
The present invention relates to communications technologies, and in particular, to a video transmission method, apparatus, and system.
Background
3GP-DASH (3GP-Dynamic Adaptive Streaming over HTTP) is a protocol proposed by The 3rd Generation Partnership Project (3 GPP) to enable Streaming media to be played smoothly when bandwidth fluctuation is large. Fig. 1 is a schematic diagram of a 3GP-DASH system architecture, and as shown in fig. 1, the 3GP-DASH system includes: a 3GP-DASH HTTP server and a 3GP-DASH client, or further comprises an HTTP caching unit. The HTTP server comprises a 3GP-DASH content preparation module, a 3GP-DASH Media Presentation Description (MPD) file distribution function module and a 3GP-DASH Media fragment (Segment) distribution function module.
In the prior art, when a Live video Service (Live Service), a 3GP-DASH content preparation module of a hypertext transfer Protocol (HTTP) server encodes content of a source media stream at a fixed level in units of Megabits Per Second (Mbps), such as 20Mbps, 50Mbps, and 100Mbps, according to a specified code rate of a source media stream provider, generates media versions (renderings) with different code rates, and segments and fragments the media content with different code rates to generate segment files, and generates corresponding MPD files, where the MPD files provide detailed description information of the segments for a client, including code rate, resolution, Uniform Resource Locator (URL) address, segment time, and the like; then, according to the video live broadcast request of the client, the MPD file distribution function module sends an MPD file to the client, so that the client obtains a media resource list according to the MPD file, selects a segment with a code rate relatively matched with the current channel available bandwidth condition and the channel state of the client, and then sends the selected segment to the client.
However, for a mobile network, the available bandwidth of a user fluctuates greatly, and in the existing 3GP-DASH video transmission technology, several fixed bitrate provided by an HTTP server to a user client easily causes a problem that playback is not smooth even if the user selects a media stream with the minimum bitrate.
Disclosure of Invention
In view of this, embodiments of the present invention provide a video transmission method, apparatus and system.
In a first aspect, an embodiment of the present invention provides a video transmission method, including:
the method comprises the steps that a server receives video request information sent by User Equipment (UE), wherein the video request information comprises UE identification;
the server acquires first load information of a network where the UE is located according to the UE identification;
the server generates a first media segment with a first code rate and a first Media Presentation Description (MPD) corresponding to the first segment, wherein the first code rate is matched with the first load information;
the server sends the first MPD to the UE so that the UE can acquire the first code rate according to the first MPD;
and the server receives fragmentation request information sent by the UE, wherein the fragmentation request information comprises the first code rate, and sends the first segment to the UE according to the first code rate.
In a first possible implementation manner of the first aspect, after the server sends the first MPD file to the UE, the method further includes:
the server acquires second load information of a network where the UE is located according to the UE identification;
the server generates a second segment with a second bitrate and a second MPD corresponding to the second segment, wherein the second bitrate is matched with the second load information;
the server sends the first segment to the UE according to the first code rate, and the sending comprises:
and the server sends the first segment and the second MPD to the UE so that the UE receives the first segment and acquires the second bit rate according to the second MPD.
With reference to the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the obtaining, by the server, first load information of a network where the UE is located according to the UE identity includes:
the server sends first load request information to a policy control unit, wherein the first load request information comprises the UE identification;
the server receives first load information sent by the strategy control unit;
the server acquires second load information of the network where the UE is located according to the UE identifier, and the method comprises the following steps:
the server sends second load request information to the policy control unit, wherein the second load request information comprises the UE identification; or, the server sends a message that the first MPD completes sending to the policy control unit, so that the policy control unit obtains the second load information according to the UE identifier;
and the server receives second load information sent by the policy control unit.
With reference to the first possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, after the server generates a first media segment with a first bitrate and a first media representation description file MPD corresponding to the first segment, the method further includes:
the server sends the first segment and the first MPD to a cache unit;
after the server generates a second segment with a second bitrate and a second MPD corresponding to the second segment, the method further includes:
the server sends the second segment and the second MPD to the cache unit;
the server sending the first MPD to the UE, including:
the server sends the first MPD to the UE through the cache unit;
the server sending the first segment and the second MPD to the UE, including:
and the server sends the first segment and the second MPD to the UE through the cache unit.
With reference to the third possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the obtaining, by the server, first load information of a network where the UE is located according to the UE identity includes:
the server sends first load request information to a policy control unit, wherein the first load request information comprises the UE identification;
the server receives first load information sent by the strategy control unit;
the server acquires second load information of the network where the UE is located according to the UE identifier, and the method comprises the following steps:
and the server receives second load information sent by the policy control unit, wherein the second load information is obtained according to the UE identifier after the policy control unit determines that the caching unit finishes receiving the first MPD.
In a second aspect, an embodiment of the present invention provides a video transmission method, including:
a policy control unit receives first load request information sent by a server, wherein the first load request information comprises a UE (user equipment) identifier of UE (user equipment) sending video information;
and the strategy control unit acquires first load information of a network where the UE is located according to the UE identification and sends the first load information to the server.
In a first possible implementation manner of the second aspect, after the sending, by the policy control unit, the first load information to the server, the method further includes:
the policy control unit receives second load request information sent by the server, wherein the second load request information comprises the UE identifier; or receiving a message sent by the server that the first MPD completes sending;
the strategy control unit acquires the second load information according to the UE identification;
and the strategy control unit sends second load information to the server.
In a second possible implementation manner of the second aspect, after the sending, by the policy control unit, the first load information to the server, the method further includes:
if the policy control unit determines that the caching unit finishes receiving the first MPD, the policy control unit acquires the second load information according to the UE identifier;
and the strategy control unit sends second load information to the server.
In a third aspect, an embodiment of the present invention provides a video transmission apparatus, including:
the system comprises a receiving and sending module, a sending and receiving module and a sending and receiving module, wherein the receiving and sending module is used for receiving video request information sent by User Equipment (UE), and the video request information comprises a UE identifier;
an obtaining module, configured to obtain first load information of a network where the UE is located according to the UE identifier;
the media preparation module is used for generating a first media segment with a first bitrate and a first Media Presentation Description (MPD) corresponding to the first segment, wherein the first bitrate is matched with the first load information;
the transceiver module is further configured to send the first MPD to the UE, so that the UE obtains the first code rate according to the first MPD;
the transceiver module is further configured to receive fragmentation request information sent by the UE, where the fragmentation request information includes the first code rate, and send the first segment to the UE according to the first code rate.
In a first possible implementation manner of the third aspect, after the transceiver module sends the first MPD file to the UE, the obtaining module is further configured to:
acquiring second load information of a network where the UE is located according to the UE identification;
the media preparation module is further configured to generate a second segment with a second bitrate and a second MPD corresponding to the second segment, where the second bitrate is matched with the second load information;
the transceiver module is specifically configured to:
and sending the first segment and the second MPD to the UE so that the UE receives the first segment and acquires the second code rate according to the second MPD.
With reference to the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the obtaining module is specifically configured to:
sending first load request information to a policy control unit, wherein the first load request information comprises the UE identifier;
receiving first load information sent by the strategy control unit;
sending second load request information to the policy control unit, wherein the second load request information comprises the UE identifier; or, a message that the first MPD completes transmission is sent to the policy control unit, so that the policy control unit obtains the second load information according to the UE identifier;
and receiving second load information sent by the strategy control unit.
With reference to the first possible implementation manner of the third aspect, in a third possible implementation manner of the third aspect, the method further includes:
after the media preparation module generates a first media segment with a first bitrate and a first Media Presentation Description (MPD) corresponding to the first segment, sending the first segment and the first MPD to a cache unit;
after the media preparation module generates a second segment with a second bitrate and a second MPD corresponding to the second segment, sending the second segment and the second MPD to the cache unit;
the transceiver module is specifically configured to:
sending the first MPD to the UE through the cache unit; and sending the first segment and the second MPD to the UE through the cache unit.
With reference to the third possible implementation manner of the third aspect, in a fourth possible implementation manner of the third aspect, the obtaining module is specifically configured to:
sending first load request information to a policy control unit, wherein the first load request information comprises the UE identifier;
receiving first load information sent by the strategy control unit;
and receiving second load information sent by the policy control unit, wherein the second load information is obtained according to the UE identifier after the policy control unit determines that the caching unit finishes receiving the first MPD.
In a fourth aspect, an embodiment of the present invention provides a video transmission apparatus, including:
the request receiving module is used for receiving first load request information sent by a server, wherein the first load request information comprises a UE (user equipment) identifier of UE (user equipment) sending video information;
a load obtaining module, configured to obtain first load information of a network where the UE is located according to the UE identity,
and the load sending module is used for sending the first load information to the server.
In a first possible implementation manner of the fourth aspect, after the load sending module sends the first load information to the server, the request receiving module is further configured to:
receiving second load request information sent by the server, wherein the second load request information comprises the UE identification; or receiving a message sent by the server that the first MPD completes sending;
the load obtaining module is further configured to obtain the second load information according to the UE identifier;
the load sending module is further configured to send second load information to the server.
In a second possible implementation manner of the fourth aspect, after the load sending module sends the first load information to the server, the load obtaining module is further configured to:
if the cache unit is determined to finish receiving the first MPD, acquiring the second load information according to the UE identifier;
the load sending module is further configured to send second load information to the server.
In a fifth aspect, an embodiment of the present invention provides a server, including: a first processor, and a first memory connected to the first processor, where the first memory may be configured to store load information, a media segment, a media representation description file MPD corresponding to the media segment, and a set of program code, and the first processor may execute the program code to implement the steps in the video transmission method according to the first aspect and any one of the first to fourth possible implementation manners of the first aspect.
In a sixth aspect, an embodiment of the present invention provides a policy control unit, including: a second processor, and a second memory connected to the second processor, the second memory being configured to store load information, and a set of program codes, the second processor being capable of executing the program codes to implement the steps of the video transmission method according to the second aspect and any one of the first to second possible implementation manners of the second aspect.
In a seventh aspect, an embodiment of the present invention provides a video transmission system, including: the server according to the fifth aspect, the policy control unit according to the sixth aspect, and the UE client; or,
the method comprises the following steps: the server according to the fifth aspect, the policy control unit according to the sixth aspect, the caching unit, and the UE client.
In the embodiment, the server acquires the real-time load information of the network where the user is located through the strategy control unit according to the video request of the user, performs content preparation according to the real-time load information, and generates the segment with the code rate matched with the real-time load information, so that the user can select the segment with the code rate matched with the network load information of the user, high matching between the media stream and the real-time network load information of the user is realized, and the real-time network bandwidth of the UE is fully utilized; and when the segment is sent to the user, the MPD file corresponding to the next segment is actively pushed, so that the network overhead brought by actively pulling the MPD file by the user can be reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic diagram of a 3GP-DASH system architecture;
fig. 2 is a flowchart of a first embodiment of a video transmission method according to the present invention;
fig. 3 is a flowchart of a second embodiment of a video transmission method according to the present invention;
fig. 4 is a flowchart of a third embodiment of a video transmission method according to the present invention;
fig. 5 is a signaling flowchart of a fourth embodiment of a video transmission method according to the present invention;
fig. 6 is a signaling flowchart of a fifth embodiment of a video transmission method according to the present invention;
fig. 7 is a schematic structural diagram of a first embodiment of a video transmission apparatus according to the present invention;
fig. 8 is a schematic structural diagram of a second video transmission apparatus according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of an embodiment of a server provided in the present invention;
FIG. 10 is a schematic structural diagram of an embodiment of a policy control unit provided in the present invention;
fig. 11 is a schematic structural diagram of a first embodiment of a video transmission system according to the present invention;
fig. 12 is a schematic structural diagram of a second embodiment of a video transmission system according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the prior art, in a DASH video transmission scheme, segments with fixed bit rates and MPDs corresponding to the segments are generated for a source media stream according to several fixed bit rates specified by a video provider during video transmission, and the specified several fixed bit rates are included in the MPDs for a client to select. However, for the live video service, mobility of users is very large, and the number of users in different time periods is also very different, so that volatility such as network bandwidth of users is large, a conventional DASH video transmission scheme is adopted to generate segment with a fixed bit rate in advance, which has a problem of large delay, and only segment with a few fixed bit rates can be provided, so that the problems that playing is not smooth when the number of users is large, and effective network bandwidth of users cannot be fully utilized when the number of users is small may exist.
Fig. 2 is a flowchart of a first embodiment of a video transmission method provided in the present invention, as shown in fig. 2, the first embodiment of the method includes the following steps:
step 201, a server receives video request information sent by a user equipment UE, where the video request information includes a UE identifier, and the server may be an HTTP server and may be used to provide a video live broadcast service to a UE client.
Step 202, the server obtains first load information of a network where the UE is located according to the UE identity.
The UE Identity includes, but is not limited to, an International Mobile Subscriber Identity (IMSI), an International Mobile Equipment Identity (IMEI), and an Integrated Services Digital Network (ISDN) number (MSISDN).
The load information in the embodiment of the present invention includes base station side load information and/or core network side load information of a network where the UE is located, where the base station side load information may include, but is not limited to: the number of users connected to the base station side, the size of the traffic served by the base station at present, the available bandwidth information of the base station side, and the use condition of Physical Resource Block (PRB for short); the load information on the core network side may include, but is not limited to: the number of the current actual users of the network, i.e. the sum of the number of users on the side of all base stations connected to the network, the sum of the traffic served by all base stations currently connected to the network, the processing capacity and the storage capacity of the core network. The first load information may include first base station load information and/or first core network load information. When the base station cell served by the core network has the conditions of load inequality between cells and resource utilization imbalance, if the number of users in a cell is small, the load is light, and the number of users in a cell is large, the load is heavy, service data packets of all users need to be processed by the core network (such as quality of service (QoS) control, strategy and charging, routing selection, data forwarding and the like), in order to better realize the purposes of improving the utilization rate of wireless resources at the base station side and improving the processing efficiency of the core network, the load information of the base station side can be considered, and the load information of the core network can also be considered.
Step 203, the server generates a first media segment with a first bitrate and a first media presentation description file (MPD) corresponding to the first segment, wherein the first bitrate is matched with first load information;
the first code rate is matched with the first load information, that is, the code rate value of the first code rate is matched with the current network load information of the user, and compared with a fixed code rate value in the prior art, the first code rate may have a code rate value higher than a highest fixed code rate value or a code rate value lower than a lowest fixed code rate value. If the number of current users is large, the network load is large, the available bandwidth is small, and the segment generated by the server has a first code rate with a low code rate value, for example, the lowest fixed code rate value in the prior art is 20Mbps, and the code rate value of the first code rate may be 10Mbps, so that the current users can smoothly play the video; if the number of current users is small, the network load is small, the available bandwidth is large, and the segment generated by the server has a first bitrate with a higher bitrate value, for example, in the prior art, the highest fixed bitrate is 100Mbps, and the bitrate value of the first bitrate may be 120Mbps, so as to fully utilize the current network bandwidth of the users, so that the current users can enjoy a smoother and higher-quality live video.
It should be noted that, for a plurality of users, the server may determine, according to the first load information of all users, a maximum code rate value of the first code rate matching with the minimum first load information, and a minimum code rate value of the first code rate matching with the highest first load information, for the first load information with a median value, may perform statistical classification, and determine a median code rate value of the first code rate matching with different classes of first load information, for example, the median value of the first load information may be classified into 8 classes from small to large, and then the server generates the first segment with 8 different median code rate values accordingly, and the specific statistical classification is not limited by the present invention.
Step 204, the server sends the first MPD to the UE, so that the UE obtains a first code rate according to the first MPD;
the first MPD comprises a first code rate set consisting of a maximum code rate value of a first code rate, a minimum code rate value of the first code rate and intermediate code rate values of a plurality of first code rates, so that different UE (user equipment) can obtain one first code rate with a code rate value which is most matched with first load information of the UE from the first code rate set.
Step 205, the server receives the fragmentation request information sent by the UE, where the fragmentation request information includes a first code rate, and sends a first segment to the UE according to the first code rate.
If the first code rate contained in the fragmentation request information is the minimum value of the first code rate, sending a first segment with the minimum code rate value to the UE according to the minimum value of the first code rate.
Preferably, in step 204, after the server sends the first MPD file to the UE, the method further includes:
the server acquires second load information of a network where the UE is located according to the UE identification;
the server generates a second segment with a second code rate and a second MPD corresponding to the second segment, wherein the second code rate is matched with the second load information;
the server sends a first segment to the UE according to the first code rate, and the first segment comprises:
and the server sends the first segment and the second MPD to the UE so that the UE receives the first segment and acquires the second code rate according to the second MPD.
Further, in step 202, the server obtains the first load information of the network where the UE is located according to the UE identifier, including: the method includes that a server sends first load request information to a policy control unit, where the first load request information includes a UE identity, and the policy control unit may be, but is not limited to, an existing policy and Charging rule function entity (policy and Charging rule function, PCRF for short) located on a core network side; the server receives the first load information sent by the policy control unit and acquires the first load information from the first load information,
the server acquires the second load information, and the method comprises two modes: firstly, the server adopts a step similar to the step of acquiring the first load information, and sends second load request information to the policy control unit and receives the second load information sent by the policy control unit, which is not described again in detail; secondly, the server sends a message that the first MPD completes sending to the policy control unit, so that the policy control unit judges that the first load information is invalid after determining that the first MPD has completed sending, acquires the second load information according to the UE identifier, and returns the second load information to the server, and the server receives the second load information sent by the policy control unit.
It should be noted that, the server of the present invention may generate segments with matching code rate according to the real-time load information of the network where the UE is located, and may also generate segments with matching length, resolution and number of code streams according to the real-time load information, or segments matched after the above parameters are combined, which is not limited in this invention.
Specifically, when the server provides a video live broadcast service, after a video play request of the UE is received, first load information of a current access network of the UE is obtained through a policy control unit according to a UE identifier, where the first load information includes base station side load information and/or core network side load information, a first segment with a first code rate matching the first load information is generated, and a first MPD file corresponding to the segment is sent to the user, so that the user can obtain the code rate matching the current network load information of the user from the first MPD, and send a media fragmentation request to the server. After the server sends the first MPD, second load information is obtained according to the UE identification, so that a second segment of a second code rate matched with the second load information and a corresponding second MPD are generated, the second MPD is sent while the first segment is sent to the UE, a user obtains a second code rate according to the second MPD while caching the first segment, request information of the second segment is sent, and by analogy, when the segment is sent to the UE, an MPD file corresponding to the next segment is actively pushed until the video playing is finished, or the UE actively stops the video request.
In the prior art, the DASH video transmission technology is based on a mode of actively pulling by a user client to obtain the latest appropriate video content. For a video live broadcast service containing a parameter MPD minimum update period (minimumUpdatePeriodMPD), a client adopts an active control strategy, and continuously and periodically pulls and checks the update of an MPD file to acquire the related information of a new media segment according to a self channel state request. However, in the information acquisition based on the client driver mode, the client frequently pulls the MPD file to the server and performs local inspection and update, which causes the problem of air interface interaction, and too many air interface interactions easily cause delay and also increase network overhead.
In the embodiment, the server acquires the real-time load information of the network where the user is located through the strategy control unit according to the video request of the user, performs content preparation according to the real-time load information, and generates the segment with the code rate matched with the real-time load information, so that the user can select the segment with the code rate matched with the network load information of the user, high matching between the media stream and the real-time network load information of the user is realized, and the real-time network bandwidth of the UE is fully utilized; and when the segment is sent to the user, the MPD file corresponding to the next segment is actively pushed, so that the network overhead brought by actively pulling the MPD file by the user can be reduced.
Fig. 3 is a flowchart of a second embodiment of a video transmission method provided by the present invention, where the second embodiment of the method is based on the embodiment of the method shown in fig. 2, and a server uses a cache unit located on a core Network side to send segment and MPD to a UE, where the cache unit includes, but is not limited to, a Content Delivery Network (CDN) cache unit. As shown in fig. 3, the method embodiment includes the following steps:
step 301, after generating a first media segment with a first bitrate and a first media representation description file MPD corresponding to the first segment, the server sends the first segment and the first MPD to a cache unit;
step 302, the server sends a first MPD to the UE through a cache unit;
step 303, the server generates a second segment with a second bitrate and a second segment with a second bitrate
After the second MPD corresponding to the segment, sending the second segment and the second MPD to the cache unit;
step 304, the server sends the first segment and the second MPD to the UE through the cache unit.
Further, in this embodiment, a process of the server obtaining the first load information is the same as that in the method embodiment shown in fig. 2, and details are not described again.
The server acquires second load information of a network where the UE is located according to the UE identifier, and the method comprises the following steps:
and the server receives second load information sent by the policy control unit, wherein the second load information is obtained according to the UE identifier after the policy control unit determines that the caching unit finishes receiving the first MPD.
Specifically, when the server sends the MPD and the segment to the UE by using the cache unit, after determining that the cache unit completes receiving the first MPD, the policy control unit actively obtains, according to the UE identifier, the next load information, that is, the second load information, of the network where the UE is located, and actively reports the load information to the server, so that the server generates, according to the load information, the second segment with the second code rate and the corresponding second MPD, where the policy control unit determines that the cache unit completes receiving the first MPD, and the method includes, but is not limited to: firstly, a policy control unit detects the receiving state of a cache unit, and when the fact that the cache unit has received a first MPD file is detected, the fact that the cache unit completes receiving the first MPD is determined; secondly, receiving a message that a caching unit reported by a Policy and Charging Enforcement Function (PCEF) completes receiving of the first MPD, and determining that the caching unit completes receiving of the first MPD, wherein before the PCEF reports, the caching unit reports the fact that a Segment media stream and the MPD sent by a server are received to the PCEF; and thirdly, receiving the message that the first MPD finishes receiving and directly reported by the cache unit, and determining that the cache unit finishes receiving the first MPD.
According to the embodiment of the method, the server adopts the cache unit to send the segment and the MPD to the UE, so that the video transmission efficiency can be further improved.
Fig. 4 is a flowchart of a third embodiment of a video transmission method provided in the present invention, and as shown in fig. 4, the embodiment of the method includes the following steps:
step 401, a policy control unit receives first load request information sent by a server, wherein the first load request information includes a User Equipment (UE) identifier of UE sending video information;
step 402, the policy control unit obtains first load information of a network where the UE is located according to the UE identity, and sends the first load information to the server.
Further, after the policy control unit sends the first load information to the server, the method further includes:
the policy control unit receives second load request information sent by the server after the server sends the first MPD, wherein the second load request information comprises a UE identifier; or receiving a message sent by the server that the first MPD completes sending;
the strategy control unit acquires second load information according to the UE identification;
and the policy control unit sends the second load information to the server.
Preferably, after the policy control unit sends the first load information to the server, the method further includes:
if the policy control unit determines that the cache unit finishes receiving the first MPD, acquiring second load information according to the UE identifier, where the cache unit may be located on a core network side, including but not limited to a CDN cache unit;
and the policy control unit sends the second load information to the server.
Specifically, after receiving the load request information sent by the server, the policy control unit triggers the base station of the network where the UE is located to report base station load information including but not limited to the current number of access persons, the current traffic, the number of users, the available bandwidth of the cell, the usage of the PRB, etc. to the policy control unit according to the UE identifier included in the load request information, after receiving the base station load information reported by the base station where the UE is located, meanwhile, the load information of the current core network is obtained, if the core network has the conditions of uneven cell load and unbalanced resource utilization, the core network load information is carried in the first load response message as the first load information together and sent to the server, and enabling the server to generate a first segment of a first code rate matched with the first load information of the network where the UE is located according to the base station side load information and/or the core network load information. And if the policy control unit receives a second load request sent by the server or receives a message sent by the server that the first MPD finishes sending, acquiring second load information and returning the second load information to the server.
If the server sends the MPD and the segment to the UE through the cache unit on the core network side, the policy control unit firstly determines whether the cache unit finishes the first MPD reception, and if the cache unit finishes the first MPD reception, the policy control unit actively acquires the load information at the next moment, namely the second load information, and reports the load information to the server. Specifically, the policy control unit may detect an MPD receiving state of the cache unit, and if it is detected that the first MPD is received, determine that the first MPD of the cache unit completes receiving; or the caching unit reports the event of receiving the Segment media stream and the MPD sent by the server to the PCEF, and the PCEF further reports the event to the policy control unit, so that the policy control unit determines that the caching unit completes receiving the first MPD, and the policy control unit triggers the base station, subscribes to request base station load information at the next moment, and/or obtains core network load information at the next moment, that is, second load information; or the caching unit directly reports the message that the first MPD file completes receiving to the policy control unit, so that the policy control unit determines that the caching unit completes receiving of the first MPD.
In this embodiment, the policy control unit obtains the base station side load information and the core network load information of the network where the UE is located, and sends the base station side load information and/or the core network load information to the server according to the load request information of the server, so that the server can obtain the real-time load information of the UE and perform content preparation according to the real-time load information, thereby generating segment with a bit rate matching the real-time load information, achieving high matching between the media stream received by the UE and the real-time load information of the UE, and fully utilizing the real-time network bandwidth of the UE.
It should be noted that the technical solution of the video transmission method provided by the present invention may also be applicable to other types of Wireless Networks, such as Wireless Local Area Networks (WLAN), where the load information may be Wireless network load information.
The technical method of the video transmission method provided by the invention can also be suitable for other service types of the MPD file which need to be updated, such as inserting new advertisements into the on-demand content, sending new notifications and the like, and sending the updated content while sending the media stream so as to reduce the network overhead brought by the user actively acquiring the update.
The following describes the video transmission method provided by the present invention with reference to two specific embodiments.
Fig. 5 is a signaling flowchart of a fourth embodiment of a video transmission method provided by the present invention, where the embodiment of the method is described with a policy control unit being a PCRF for an example of a scenario in which a server directly sends a segment and an MPD to a UE, as shown in fig. 5, the embodiment of the method includes the following steps:
step 501, UE sends a video transmission request to a server, wherein the video transmission request comprises a UE identifier;
step 502, the server sends first load request information to the PCRF, where the first load request information includes a UE identity;
step 503, the PCRF subscribes to a Radio Access Network (RAN) where the UE is located to request first base station load information, where the Radio Access Network is mainly a base station, and includes but is not limited to a base station (NodeB), a Radio Network Controller (Radio Network Controller, RNC for short) and an evolved NodeB (eNodeB for short);
step 504, the RAN returns first base station load information to the PCRF, where the first base station load information includes, but is not limited to, a base station load, a current number of access users, and a cell available bandwidth;
step 505, the PCRF obtains first core NetWork load information from a packet Data Gateway (P-GW for short) on the core NetWork side;
step 506, the PCRF sends first load information to the server, where the first load information includes the first base station load information and/or first core network load information;
step 507, the server generates a first segment and a first MPD of a first code rate matched with the first load information, where the first code rate may include multiple different first code rate values, so that different UEs select a first code rate value that is most matched with their current channels;
step 508, the server sends a first MPD to the UE, where the first MPD includes a first code rate;
step 509, the UE parses the first MPD, and obtains a first code rate value matched with its own channel from the first code rate;
step 510, the UE sends a media fragmentation request to the server according to the first code rate value;
step 511, including step 511a, the server sends second load request information to the PCRF, where the second load request information includes the UE identity; or 511b, the server sends a message that the first MPD completes sending to the PCRF;
step 512-step 515, and synchronization steps 503-506, which are not described in detail.
Step 516, the server generates a second segment and a second MPD of a second bitrate matched with the second load information, where the second bitrate may include multiple different second bitrate values, so that different UEs select a second bitrate value that is most matched with their current channels;
step 517, the server sends a first segment with a first code rate value and a second MPD to the UE, where the second MPD includes a second code rate;
step 518, the UE plays the first segment with the first code rate value while caching, analyzes the second MPD, and obtains a second code rate value matched with the self channel from the second code rate;
step 519, the UE sends a media fragmentation request according to the second bitrate value.
In this way, after step 519, steps 511-518 are repeatedly executed until the video playing is finished, and in the process of transmitting the video, if the server detects that a certain UE stops the media segment request, the server stops sending the newly generated MPD file and segment to the UE.
It should be noted that steps 511-515 and step 510 may be performed simultaneously, or steps 511-515 may be performed before step 510.
In the embodiment of the method, the server acquires the real-time load information of the network where the UE is located from the PCRF, and performs content preparation according to the real-time load information to generate the segment with the code rate matched with the real-time load information, so that a user can select the segment with the code rate matched with the network load information of the user, high matching between the media stream and the real-time network load information of the user is realized, and the real-time network bandwidth of the UE is fully utilized; and when sending segment to user, actively pushing MPD file corresponding to next segment, so that user can actively pull network overhead brought by MPD file.
Fig. 6 is a signaling flowchart of a fifth embodiment of a video transmission method provided by the present invention, where in the method embodiment, for a scenario in which a server sends segment and MPD to a UE through a cache unit, a cache unit is a CDN cache unit and a policy control unit is a PCRF, and for other types of cache units, implementation manners thereof are similar and are not described again specifically, as shown in fig. 6, the method embodiment includes the following steps:
601, UE sends a video transmission request to a server, wherein the video transmission request comprises a UE identifier;
step 602, the server sends first load request information to the PCRF, where the first load request information includes a UE identity;
step 603, the PCRF subscribes to the RAN where the UE is located to request the first base station load information, where the RAN is mainly a base station, including but not limited to NodeB, RNC, and eNodeB, and is not described any further.
Step 604, the RAN returns first base station load information to the PCRF, where the first base station load information includes, but is not limited to, a base station load, a current number of access users, and a cell available bandwidth;
step 605, the PCRF acquires the first core network load information from the P-GW on the core network side;
step 606, the PCRF sends first load information to the server, where the first load information includes the first base station load information and/or first core network load information;
step 607, the server generates a first segment and a first MPD of a first bitrate matched with the first load information, where the first bitrate may include multiple different first bitrate values, so that different UEs select the first bitrate value that is most matched with their current channels;
step 608, the server sends the first segment and the first MPD to a CDN cache unit located on the core network side;
step 609, the cache unit sends a first MPD to the UE, where the first MPD includes a first code rate;
step 610, if the PCRF determines that the CDN cache unit finishes receiving the first MPD, then step 611 is performed;
step 611, the PCRF subscribes to the RAN where the UE is located to request the second base station load information;
step 612, the UE analyzes the first MPD, and acquires a first code rate value matched with a self channel from the first code rate;
step 613, the UE sends a media fragmentation request to the server according to the first code rate value;
step 614, the RAN returns the second base station load information to the PCRF;
step 615, the PCRF acquires second core network load information from the P-GW of the core network side;
step 616, the PCRF sends second load information to the server, where the second load information includes the second base station load information and/or second core network load information;
step 617, the server generates a second segment and a second MPD of a second bitrate matched with the second load information, where the second bitrate may include multiple different second bitrate values, so that different UEs select a second bitrate value that is most matched with their current channels;
step 618, the server sends the second segment and the second MPD to the CDN cache unit located on the core network side;
step 619, the CDN cache unit has a first segment and a second MPD with a first bitrate value to the UE, where the second MPD includes a second bitrate;
step 620, the UE plays the first segment with the first code rate value while caching, analyzes the second MPD, and obtains a second code rate value matched with the self channel from the second code rate;
step 621, the UE sends a media fragmentation request according to the second bitrate value.
And so on, after the step 621, the steps 610-620 are repeatedly executed until the video playing is finished, and in the process of transmitting the video, if the CDN cache unit detects that a certain UE terminates the media fragmentation request, the CDN cache unit stops sending the newly generated MPD file and segment to the UE.
It should be noted that steps 614-616 and steps 612-613 may be performed simultaneously, or steps 614-616 may be performed before steps 612-613.
In the embodiment of the method, on the basis of the embodiment of the method shown in fig. 5, the server sends the segment and the MPD to the UE by using the cache unit, so that the efficiency of video transmission is further improved.
Fig. 7 is a schematic structural diagram of a first embodiment of a video transmission apparatus according to the present invention, as shown in fig. 7, the video transmission apparatus 700 includes: a transceiver module 701, an acquisition module 702, a media preparation module 703, wherein,
a transceiver module 701, configured to receive video request information sent by a user equipment UE, where the video request information includes a UE identifier;
an obtaining module 702, configured to obtain first load information of a network where the UE is located according to the UE identifier;
a media preparation module 703, configured to generate a first segment with a first bitrate and a first MPD corresponding to the first segment, where the first bitrate is matched with the first load information;
the transceiver module 701 is further configured to send the first MPD to the UE, so that the UE obtains the first code rate according to the first MPD;
the transceiver module 701 is further configured to receive fragmentation request information sent by the UE, where the fragmentation request information includes a first code rate, and send a first segment to the UE according to the first code rate.
Preferably, the obtaining module 702, after the transceiver module 701 transmits the first MPD file to the UE, is further configured to:
acquiring second load information of a network where the UE is located according to the UE identifier;
the media preparation module 703 is further configured to generate a second segment with a second bitrate and a second MPD corresponding to the second segment, where the second bitrate is matched with the second load information;
accordingly, the transceiver module 701 is specifically configured to:
and sending the first segment and the second MPD to the UE so that the UE receives the first segment and acquires a second code rate according to the second MPD.
Further, the obtaining module 702 is specifically configured to:
sending first load request information to a policy control unit, wherein the first load request information comprises a UE identifier;
receiving first load information sent by a strategy control unit;
sending second load request information to a policy control unit, wherein the second load request information comprises a UE identifier; or, a message that the first MPD completes transmission is sent to the policy control unit, so that the policy control unit acquires the second load information according to the UE identifier;
and receiving second load information sent by the strategy control unit.
Preferably, the video transmission apparatus 700 further includes a buffer module 704, configured to:
after the media preparation module 703 generates a first segment with a first bitrate and a first MPD corresponding to the first segment, the first segment and the first MPD are sent to the cache unit;
after the media preparation module 703 generates a second segment with a second bitrate and a second MPD corresponding to the second segment, the second segment and the second MPD are sent to the cache unit;
accordingly, the transceiver module 701 is specifically configured to:
sending the first MPD to the UE through a cache unit; and sending the first segment and the second MPD to the UE through the buffer unit.
Accordingly, the obtaining module 702 is specifically configured to:
sending first load request information to a policy control unit, wherein the first load request information comprises a UE identifier;
receiving first load information sent by a strategy control unit;
and receiving second load information sent by the policy control unit, wherein the second load information is obtained according to the UE identifier after the policy control unit determines that the caching unit finishes receiving the first MPD.
The video transmission apparatus of this embodiment may be used to implement the technical solution in the method embodiments shown in fig. 2 or fig. 3, and the implementation principle and the technical effect are similar, which are not described in detail again.
Fig. 8 is a schematic structural diagram of a second embodiment of a video transmission apparatus according to the present invention, and as shown in fig. 8, the video transmission apparatus 800 includes: a request receiving module 801, a load obtaining module 802, a load sending module 803, wherein,
a request receiving module 801, configured to receive first load request information sent by a server, where the first load request information includes a UE identifier of a user equipment UE that sends video information;
a load obtaining module 802, configured to obtain first load information of a network where the UE is located according to the UE identity,
the load sending module 803 is configured to send the first load information to the server.
Further, the request receiving module 801, after the load sending module sends the first load information to the server, is further configured to:
receiving second load request information sent by a server, wherein the second load request information comprises a UE identifier; or receiving a message sent by the server that the first MPD completes sending;
the load obtaining module 802 is further configured to obtain second load information according to the UE identifier;
the load sending module 803 is further configured to send the second load information to the server.
Preferably, the load obtaining module 802 is further configured to, after the load sending module 803 sends the media preparation module first load information to the server:
if the fact that the cache unit finishes receiving the first MPD is determined, second load information is obtained according to the UE identification;
the load sending module 803 is further configured to send the second load information to the server.
The video transmission apparatus provided in this embodiment may be used to implement the technical solution in the method embodiment shown in fig. 4, and the implementation principle and the technical effect are similar, which are not described in detail again.
Fig. 9 is a schematic structural diagram of an embodiment of a server provided by the present invention, and as shown in fig. 9, the server 900 includes a first processor 901 and a first memory 902 connected to the first processor 901, where the first memory 902 may be used to store load information, a segment, an MPD file corresponding to the segment, and a set of program codes, and the first processor 901 may execute the set of program codes to implement the technical solution in the video transmission method embodiment shown in fig. 2 or fig. 3, and an implementation principle and a technical effect thereof are similar and are not described again in detail.
Fig. 10 is a schematic structural diagram of an embodiment of a policy control unit provided in the present invention, and as shown in fig. 10, the policy control unit 1000 includes: a second processor 1001 and a second memory 1002 connected to the second processor 1001, where the second memory 1002 may be configured to store load information and a set of program codes, and the second processor 1001 may execute the set of program codes to implement the technical solution in the video transmission method embodiment shown in fig. 4, and the implementation principle and the technical effect thereof are similar and are not described again in detail.
Fig. 11 is a schematic structural diagram of a first embodiment of a video transmission system according to the present invention, and as shown in fig. 11, the video transmission system 1100 includes: a server 1101, a policy control unit 1102, and at least one user equipment UE client 1103, where the server 1101 may be the server shown in fig. 9 and may be used to execute the technical scheme in the method embodiment shown in fig. 2, and the policy control unit may be the policy control unit shown in fig. 10 and may be used to execute the technical scheme in the method embodiment shown in fig. 4, which have similar implementation principles and technical effects and are not described again in detail.
Fig. 12 is a schematic structural diagram of a second embodiment of a video transmission system according to the present invention, and as shown in fig. 12, the video transmission system 1200 includes: a server 1201, a policy control unit 1202, at least one user equipment UE client 1203, and a caching unit 1204, where the server 1201 may be the server shown in fig. 9 and may be used to execute the technical scheme in the method embodiment shown in fig. 3, the policy control unit may be the policy control unit shown in fig. 10 and may be used to execute the technical scheme in the method embodiment shown in fig. 4, and may be a PCRF located on a core network side, but is not limited thereto, and the caching unit 1204 may be a CDN caching unit located on the core network side, but is not limited thereto, and implementation principles and technical effects thereof are similar and will not be described again in detail.
From the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, the method is simple. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or a wireless technology such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technology such as infrared, radio, and microwave are included in the fixation of the medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy Disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (13)

1. A video transmission method, comprising:
the method comprises the steps that a server receives video request information sent by User Equipment (UE), wherein the video request information comprises UE identification;
the server acquires first load information of a network where the UE is located according to the UE identification;
the server generates a first media segment with a first code rate and a first Media Presentation Description (MPD) corresponding to the first segment, wherein the first code rate is matched with the first load information;
the server sends the first MPD to the UE so that the UE can acquire the first code rate according to the first MPD;
the server receives fragmentation request information sent by the UE, wherein the fragmentation request information comprises the first code rate, and sends the first segment to the UE according to the first code rate;
after the server sends the first MPD file to the UE, the method further includes:
the server acquires second load information of a network where the UE is located according to the UE identification;
the server generates a second segment with a second bitrate and a second MPD corresponding to the second segment, wherein the second bitrate is matched with the second load information;
the server sends the first segment to the UE according to the first code rate, and the sending comprises:
and the server sends the first segment and the second MPD to the UE so that the UE receives the first segment and acquires the second bit rate according to the second MPD.
2. The method of claim 1, wherein the obtaining, by the server, the first load information of the network where the UE is located according to the UE identity comprises:
the server sends first load request information to a policy control unit, wherein the first load request information comprises the UE identification;
the server receives first load information sent by the strategy control unit;
the server acquires second load information of the network where the UE is located according to the UE identifier, and the method comprises the following steps:
the server sends second load request information to the policy control unit, wherein the second load request information comprises the UE identification; or, the server sends a message that the first MPD completes sending to the policy control unit, so that the policy control unit obtains the second load information according to the UE identifier;
and the server receives second load information sent by the policy control unit.
3. The method of claim 1, wherein after the server generates a first media segment with a first bitrate and a first media representation description file (MPD) corresponding to the first segment, the method further comprises:
the server sends the first segment and the first MPD to a cache unit;
after the server generates a second segment with a second bitrate and a second MPD corresponding to the second segment, the method further includes:
the server sends the second segment and the second MPD to the cache unit;
the server sending the first MPD to the UE, including:
the server sends the first MPD to the UE through the cache unit;
the server sending the first segment and the second MPD to the UE, including:
and the server sends the first segment and the second MPD to the UE through the cache unit.
4. The method of claim 3, wherein the obtaining, by the server, the first load information of the network where the UE is located according to the UE identity comprises:
the server sends first load request information to a policy control unit, wherein the first load request information comprises the UE identification;
the server receives first load information sent by the strategy control unit;
the server acquires second load information of the network where the UE is located according to the UE identifier, and the method comprises the following steps:
and the server receives second load information sent by the policy control unit, wherein the second load information is obtained according to the UE identifier after the policy control unit determines that the caching unit finishes receiving the first MPD.
5. A video transmission method, comprising:
a policy control unit receives first load request information sent by a server, wherein the first load request information comprises a UE (user equipment) identifier of UE (user equipment) sending video information;
the strategy control unit acquires first load information of a network where the UE is located according to the UE identification and sends the first load information to the server;
after the policy control unit sends the first load information to the server, the method further includes:
if the policy control unit determines that the caching unit finishes receiving the first media presentation description file MPD, acquiring second load information according to the UE identifier;
and the strategy control unit sends second load information to the server.
6. A video transmission apparatus, comprising:
the system comprises a receiving and sending module, a sending and receiving module and a sending and receiving module, wherein the receiving and sending module is used for receiving video request information sent by User Equipment (UE), and the video request information comprises a UE identifier;
an obtaining module, configured to obtain first load information of a network where the UE is located according to the UE identifier;
the media preparation module is used for generating a first media segment with a first bitrate and a first Media Presentation Description (MPD) corresponding to the first segment, wherein the first bitrate is matched with the first load information;
the transceiver module is further configured to send the first MPD to the UE, so that the UE obtains the first code rate according to the first MPD;
the transceiver module is further configured to receive fragmentation request information sent by the UE, where the fragmentation request information includes the first code rate, and send the first segment to the UE according to the first code rate;
the obtaining module, after the transceiver module sends the first MPD file to the UE, is further configured to:
acquiring second load information of a network where the UE is located according to the UE identification;
the media preparation module is further configured to generate a second segment with a second bitrate and a second MPD corresponding to the second segment, where the second bitrate is matched with the second load information;
the transceiver module is specifically configured to:
and sending the first segment and the second MPD to the UE so that the UE receives the first segment and acquires the second code rate according to the second MPD.
7. The apparatus of claim 6, wherein the obtaining module is specifically configured to:
sending first load request information to a policy control unit, wherein the first load request information comprises the UE identifier;
receiving first load information sent by the strategy control unit;
sending second load request information to the policy control unit, wherein the second load request information comprises the UE identifier; or, a message that the first MPD completes transmission is sent to the policy control unit, so that the policy control unit obtains the second load information according to the UE identifier;
and receiving second load information sent by the strategy control unit.
8. The apparatus of claim 6, further comprising a buffer unit to:
after the media preparation module generates a first media segment with a first bitrate and a first Media Presentation Description (MPD) corresponding to the first segment, sending the first segment and the first MPD to a cache unit;
after the media preparation module generates a second segment with a second bitrate and a second MPD corresponding to the second segment, sending the second segment and the second MPD to the cache unit;
the transceiver module is specifically configured to:
sending the first MPD to the UE through the cache unit; and sending the first segment and the second MPD to the UE through the cache unit.
9. The apparatus of claim 8, wherein the obtaining module is specifically configured to:
sending first load request information to a policy control unit, wherein the first load request information comprises the UE identifier;
receiving first load information sent by the strategy control unit;
and receiving second load information sent by the policy control unit, wherein the second load information is obtained according to the UE identifier after the policy control unit determines that the caching unit finishes receiving the first MPD.
10. A video transmission apparatus, comprising:
the request receiving module is used for receiving first load request information sent by a server, wherein the first load request information comprises a UE (user equipment) identifier of UE (user equipment) sending video information;
a load obtaining module, configured to obtain first load information of a network where the UE is located according to the UE identity,
a load sending module, configured to send the first load information to the server;
the load obtaining module, after the load sending module sends the first load information to the server, is further configured to:
if the fact that the caching unit finishes receiving the MPD is determined, second load information is obtained according to the UE identification;
the load sending module is further configured to send second load information to the server.
11. A server, comprising: a first processor, and a first memory connected to the first processor, wherein the first memory can be used for storing load information, media segment, media representation description file MPD corresponding to the media segment, and a set of program codes, and the first processor can execute the program codes to implement the steps in the video transmission method according to any one of claims 1 to 4.
12. A policy control unit, comprising: a second processor, and a second memory coupled to the second processor, the second memory for storing load information, and a set of program codes, the second processor being capable of executing the program codes to implement the steps in the video transmission method of claim 5.
13. A video transmission system, comprising: the server of claim 11, the policy control unit of claim 12 and a user equipment, UE, client; or,
the method comprises the following steps: the server according to claim 11, the policy control unit according to claim 12, the caching unit and the user equipment, UE, client.
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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3416396B1 (en) * 2016-02-12 2021-11-24 Sony Group Corporation Information processing device and information processing method
CN114651449B (en) * 2020-04-26 2023-09-29 华为技术有限公司 Method and device for adjusting stream media parameter dynamic self-adaptive network
CN113613032A (en) * 2021-08-04 2021-11-05 杭州梦视网络科技有限公司 Video transmission method of embedded remote teaching experiment system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394291A (en) * 2007-09-17 2009-03-25 华为技术有限公司 Method, device and system for processing service
WO2009075766A2 (en) * 2007-12-05 2009-06-18 Swarmcast, Inc. Dynamic bit rate scaling
CN102238419A (en) * 2010-04-26 2011-11-09 三星电子株式会社 Method and apparatus for playing live content
CN102812666A (en) * 2009-11-13 2012-12-05 三星电子株式会社 Method And Apparatus For Providing And Receiving Data
CN103260052A (en) * 2012-02-20 2013-08-21 Vixs系统公司 Self-adapting display flows
CN103299595A (en) * 2010-11-01 2013-09-11 捷讯研究有限公司 Method and apparatus for updating HTTP content descriptions
CN103370914A (en) * 2010-11-02 2013-10-23 瑞典爱立信有限公司 Methods and devices for media description delivery
CN103384994A (en) * 2011-02-11 2013-11-06 交互数字专利控股公司 Method and apparatus for distribution and reception of content
CN103581701A (en) * 2012-08-07 2014-02-12 株式会社Ntt都科摩 Method, system and network for transmitting multimedia data to a plurality of clients

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110137093A (en) * 2010-06-16 2011-12-22 삼성전자주식회사 Method and apparatus for playing recorded contents in wireless communication system
KR20120114016A (en) * 2011-04-06 2012-10-16 삼성전자주식회사 Method and apparatus for network adaptive streaming user data in a outer terminal
US9401968B2 (en) * 2012-01-20 2016-07-26 Nokia Techologies Oy Method and apparatus for enabling pre-fetching of media

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101394291A (en) * 2007-09-17 2009-03-25 华为技术有限公司 Method, device and system for processing service
WO2009075766A2 (en) * 2007-12-05 2009-06-18 Swarmcast, Inc. Dynamic bit rate scaling
CN102812666A (en) * 2009-11-13 2012-12-05 三星电子株式会社 Method And Apparatus For Providing And Receiving Data
CN102238419A (en) * 2010-04-26 2011-11-09 三星电子株式会社 Method and apparatus for playing live content
CN103299595A (en) * 2010-11-01 2013-09-11 捷讯研究有限公司 Method and apparatus for updating HTTP content descriptions
CN103370914A (en) * 2010-11-02 2013-10-23 瑞典爱立信有限公司 Methods and devices for media description delivery
CN103384994A (en) * 2011-02-11 2013-11-06 交互数字专利控股公司 Method and apparatus for distribution and reception of content
CN103260052A (en) * 2012-02-20 2013-08-21 Vixs系统公司 Self-adapting display flows
CN103581701A (en) * 2012-08-07 2014-02-12 株式会社Ntt都科摩 Method, system and network for transmitting multimedia data to a plurality of clients

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