CN109981693A - The method of rate control and system of 3D content distribution platform - Google Patents
The method of rate control and system of 3D content distribution platform Download PDFInfo
- Publication number
- CN109981693A CN109981693A CN201711440594.8A CN201711440594A CN109981693A CN 109981693 A CN109981693 A CN 109981693A CN 201711440594 A CN201711440594 A CN 201711440594A CN 109981693 A CN109981693 A CN 109981693A
- Authority
- CN
- China
- Prior art keywords
- block
- file
- message
- client
- transmission
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Information Transfer Between Computers (AREA)
Abstract
The invention discloses the method for rate control and system of a kind of 3D content distribution platform, method includes the following steps: step 1, it is contemplated that calculate the sum of the block of file fragment cutting；Each big file is cut into each and every one several file fragments by the size of block by step 2；Step 3, server end complete the transmission of file data and notify client；Step 4, client receive duration according to the size of block is default, delay in setting, verify the integrality of a reception block；If fruit block is complete, temporary file will be written；If fruit block is imperfect, by according to message loss situation in block to message server request retransmission entire block or lacked；Step 5, the message for retransmitting entire block or lacking；Step 6, server end adjust module by block and adjust the size of transmission block come fine granularity adjustment transmission rate；Step 7 when client receives all file fragments, will reorganize file according to file fragment description information by file combination module.
Description
Technical field
The present invention relates to a kind of document transmission method of video platform and systems, more specifically to a kind of 3D content
The method of rate control and system of distribution platform.
Background technique
Portal is the UI (User Interface) of interactive TV, and the portal towards TV set top box terminal is generally basede on browsing
Device realizes that it is the important component of interactive television system.Currently, interactive television service is just being gradually introducing 3D content, but electricity
The interface 2D still but is being continued to use depending on portal, under the 3D display mode of 3D television set, the portal interface of this 2D can not normally be shown
Show.
Currently, the channel for the three-dimensional video-frequency program that Europe, the United States, day and China pilot, including South Africa world cup 3D in 2010
Including live streaming, " Side-by-Side " (abbreviation SBS) transmission technology of spatial intersecting, the i.e. left half of display of screen are mostly used
Left video in the transmission of video stereopsis of (left eye viewing), right one side of something are shown in the transmission of video stereopsis of (right eye viewing)
Right wing video, stereoscopic effect is presented by polarised light or shutter glasses viewing in receiving end.Such technology equally can be existing
There is transmission in high definition channel all the way, but horizontal resolution can reduce half.
Content 3Dization and service interaction are two important trends of television field.In interactive television system, content and
Portal is two big component parts of interactive TV service, wherein portal is the service interface that interactive TV presents to audience.At present
3D TV commercial system both domestic and external only supports the video content with 3D stereoscopic effect, portal still to use traditional 2D circle
Face, this just leads to the problem of such a: the portal interface of 2D is under the 3D mode of display terminal (at present based on 3D television set)
It can not normally show.Therefore, the 3D three-dimensional of portal is one of current television field urgent problem to be solved.
Frame compatible format application model is used for current 3D TV, in the 3D electricity that 3D television production end is used to broadcast in flakes
Depending on, the compatible SbS stereotelevision format of frame is formed by 3D frame compatible format conversion module, after two-way three-dimensional video-frequency is synchronized,
For next code, audit, broadcast.
It is in blocks for the compatible 3D of frame, it is identical as traditional mode, after passing through audit before play-out, so that it may upper to broadcast system
System.3D television broadcast system refers to system relevant to links such as the generation of broadcast items signal, processing, transmission, monitoring supervisions
And equipment, including the parts such as video and audio and periphery, monitoring supervision, subtitle.
In broadcast system, for the copyright protection of 3D program, broadcast system is needed for different terminals ability, 2D/3D
Viewing demand and television network broadcast channel, program request, a variety of ways of distribution of downloading etc., unify 3D television media content
Digital content security and protection are handled, and are provided different play authorizations to different usage scenarios and permitted, television content 3D is met
Copyright protection demand after change.
In the Broadcast Control platform of 3D program, file transfer rate is always a critical problem, improves transmission rate
The user experience of 3D broadcasting program platform can greatly be promoted.
Summary of the invention
Aiming at the problem that file transfer rate needs to improve in Broadcast Control platform existing in the prior art, the purpose of the present invention
It is to provide the method for rate control and system of a kind of 3D content distribution platform.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of method of rate control of 3D content distribution platform, comprising the following steps: step 1, it is contemplated that calculate file fragment and cut
The sum of the block divided；Each big file is cut into each and every one several file fragments by the size of block by step 2；Step 3, clothes
It completes the transmission of file data and notifies client in business device end；Step 4, client receive duration according to the size of block is default,
It is delayed when setting, verifies the integrality of a reception block；If fruit block is complete, temporary file will be written；If fruit block is imperfect, by root
According to message loss situation in block to message server request retransmission entire block or lacked；Step 5, retransmit entire block or
The message lacked；Step 6, server end adjust module by block and adjust the size of transmission block come fine granularity adjustment transmission rate；
Step 7 will be according to file fragment description information weight by file combination module when client receives all file fragments
New constituent act.
Step 1 further comprises: client initiates file content acquisition request, and received piece of maximum value of energy is issued
Server end, server end take the total of the block of the size precomputation file fragment cutting an of block in the maximum range of block
Number, and block message is sent to client.
Step 2 further comprises: server end completes the cutting of big file by file fragmentation module, each is big
File is cut into 1 by the size of block~N number of file fragment；Each file fragment is made of 1~M block, and each piece by 1~L
A message composition, each piece and message have a mark, and the mark of block is in affiliated file fragment with uniqueness, message
Mark also has uniqueness in affiliated block.
Step 3 further comprises: server end sends the transmission that thread completes file data by UDP, is assisted using UDP
The block message of each file fragment is sent to client according to the serial number sequence from small to large of message by view.
Step 5 further comprises: received server-side will be requested to when the request for retransmitting entire block or the message lacked
The block number or message numbering of repeating transmission notify to find the transmission block by sending thread management module to thread management module is sent
Or the UDP of the message lacked sends thread, notice UDP sends thread and retransmits.
Step 6 further comprises: block adjustment module is timed to the weight of client in repeating management module polls this period
Hair request record, then arrive send thread management module inquire this period in have been issued to the block of client or the note of message
Record, decides whether the size of adjustment block according to request repeat and the ratio sent, when server end has adjusted the size of block,
Adjustment result notice TCP receiving or sending thread, block message notice client is retransmitted by TCP receiving or sending thread.
To achieve the above object, the present invention also adopts the following technical scheme that
A kind of speed control system of 3D content distribution platform, including server and client side, wherein server includes more
A content distribution subsystem, content distribution subsystem include block message synchronization module, file fragmentation module, send thread management mould
Block, block adjust module.Block message synchronization module takes the size precomputation text an of block in maximum range that can be received piece
The sum of the block of part segment cutting, and block message is sent to client.File fragmentation module is each big file by block
Size, is cut into each and every one several file fragments, and server end completes the transmission of file data and notifies client.Client according to
The size of block is default to receive duration, delays in setting, verifies the integrality of a reception block；If fruit block is complete, write-in is faced
When file；If fruit block is imperfect, by according to message loss situation in block to message server request retransmission entire block or lacked.
Received server-side notifies the block number of request repeat or message numbering to when the request for retransmitting entire block or the message lacked
To thread management module is sent, the UDP that the transmission block or the message lacked are found by sending thread management module sends thread,
UDP is notified to send thread and retransmit.The size of block adjustment module adjustment transmission block carrys out fine granularity adjustment transmission rate.Client
When receiving all file fragments, file will be reorganized according to file fragment description information by file combination module.
Further, file fragmentation module presses each big file the size of block, is cut into 1~N number of file fragment；Often
A file fragment is made of 1~M block, and each piece is made of 1~L message, and each piece and message have a mark, block
Mark in affiliated file fragment have uniqueness, message identification in affiliated block also have uniqueness；
Further, client receives duration according to the size of block is default, delays in setting, verifies a reception block
Integrality；If fruit block is complete, temporary file will be written；If fruit block is imperfect, will be assisted according to message loss situation in block using TCP
It discusses to message server request retransmission entire block or lacked.
Further, block adjustment module is timed to the repeating transmission request note of client in repeating management module polls this period
Record, then arrive to send thread management module and inquire in this period and has been issued to the block of client or the record of message, according to asking
It asks the ratio retransmitted and sent to decide whether the size of adjustment block, when server end has adjusted the size of block, adjustment is tied
Fruit notifies TCP receiving or sending thread, retransmits block message notice client by TCP receiving or sending thread.
In the above-mentioned technical solutions, the method for rate control of 3D content distribution platform of the invention and system can be according to visitors
The ability adjust automatically transmission rate at family end and network, maximization network resource utilization.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of server in the present invention；
Fig. 2 is the flow chart of the method for the present invention；
Fig. 3 is the structural schematic diagram of the content of present invention distribution subsystem；
Fig. 4 is the flow chart of the reliable transport protocol based on UDP.
Specific embodiment
Technical solution of the present invention is further illustrated with reference to the accompanying drawings and examples.
The purpose of the present invention is the ability adjust automatically transmission rates according to client and network, and server end can be definite
Know that client receives message status, retransmitted to avoid multiple, to make entire under client and network capabilities enabled condition
File transmission time shortens.
As shown in Figure 1, the multimedia content such as video transmitted in public network it is slow time-consuming aiming at the problem that, the invention discloses
One multi-medium data distribution approach, content service node (such as vod server) using logic is tree-like mutually pass by the way of, will be more
Media data is quickly deployed to content service node by the network platform.
In the present invention, only have a small amount of content service node from other groups in a local zone (it is assumed that a group)
Outer content service node obtains content-data, and the content service node after completing the acquisition of data serves as peer in P2P structure
Server-side, the content service node in remaining group provide download service by server-side as peer client for client, thus
Achieve the purpose that quickly to issue, save public-network bandwidth.
All data transfer operations all manage server triggers by distribution, and content service node passively executes.
Referring to Fig. 2, the present invention further discloses a kind of method of rate control of 3D content distribution platform, so that of the invention
Above system can utilize network and client resource to greatest extent.To achieve the above object, the present invention uses udp protocol
(User Datagram Protocol, User Datagram Protocol) sends file data, and file data is transmission every time with " block "
With verifying integrality basic unit, and by using dynamic adjust send " block " size fine granularity adjust transmission rate.
As shown in Fig. 2, method of the invention is realized by following step:
S1: when client initiates file content acquisition request, the maximum value MaxBlock service of issuing that can be received piece
Device end, the block message synchronization module of server end take the size precomputation file fragment cutting an of block within the scope of MaxBlock
Block total BlockNum, and block message is sent to client；
S2: server end completes the cutting of big file by file fragmentation module, each big file is pressed above-mentioned block
Size, be cut into 1~N number of file fragment；Each file fragment is made of 1~M block, and each piece by 1~L
Message composition, each piece and message have a mark, and the mark of block is in affiliated file fragment with uniqueness, message mark
Know also has uniqueness in affiliated block；
S3: server end sends the transmission that thread completes file data by UDP, using udp protocol according to the sequence of message
The block message of each file fragment is sent to client by sequence number from small to large；
S4: client receives duration according to the size of block is default, delays in setting, verifies the complete of a reception block
Property；If fruit block is complete, temporary file will be written；If fruit block is imperfect, Transmission Control Protocol will be utilized according to message loss situation in block
(Transmission Control Protocol, transmission control protocol) is to report server request retransmission entire block or lacked
Text；
S5: received server-side to when the request for retransmitting entire block or the message lacked, by the block number of request repeat or
Message numbering notifies to sending thread management module, is found by sending thread management module and sends the block or the message that lacks
UDP sends thread, and the UDP is notified to send thread and retransmit；
S6: server end adjusts the size of module adjustment transmission " block " by block and adjusts transmission rate come fine granularity, described
Block adjustment module be timed to the repeating transmission request record of client in repeating management module polls this period, then arrive transmission line
Thread management module polls have been issued to the block of client or the record of message in this period, according to request repeat and have sent
Ratio decides whether the size of adjustment block, and when server end has adjusted the size of block, adjustment result notice TCP is received and dispatched line
Journey retransmits block message notice client by TCP receiving or sending thread；
S7: it when client receives all file fragments, will describe to believe according to file fragment by file combination module
Breath reorganizes file.
In the method for the invention, the size of block is adjusted according to request repeat and the ratio sent, request weight
The ratio of hair is high, illustrates network congestion, server end will reduce the size of block.The ratio of request repeat is low, shows Network Packet Loss
Rate is low or server end and client process ability it is strong, server end can increase the size of block.Though method of the invention increases
A small amount of network overhead is added, has but effectively utilized the Internet resources of client access, reduce the transmission time of entire file.
In addition, the present invention further discloses a kind of speed control system of 3D content distribution platform, including server
And client, wherein server includes multiple content distribution subsystems.Content distribution subsystem is obtained from Content Management System
Media data, according to the deployment architecture of equipment, using the quick transmission technology of content, meanwhile, content distribution subsystem also can be direct
Controllable multimedia download services are provided to terminal device.
Contents of the present invention distribution subsystem design architecture is as shown in figure 3, it mainly includes following modules:
Media retrieval module: it is responsible for obtaining multimedia content from Content Management by other nodes, and is responsible for the more matchmakers of management
The storage of volume data improves multimedia storage efficiency.To the higher multi-medium data of temperature, local memory caching is carried out, is reduced
Disk read-write, raising, which pushes away, broadcasts speed；It to the lower multi-medium data of temperature, deletes in due course, is new media data Free up Memory.
Rate control module: it according to information such as network characterizations, calculates to different distribution speed.
Distribution module: according to the scheduling of scheduler module, according to the distribution speed that distribution rate control module calculates, using interior
Hold quick transmission technology to other purposes distributing multimedia contents.
Log management: it is responsible for the information such as the log management of system and alarm, the exception of reporting system.
Scheduler module: being responsible for the overall control of system, is mainly responsible for the distribution request for receiving different clients, and according to negative
Balanced principle is carried, release tasks are added to different distribution modules.
Block message synchronization module: the size precomputation file fragment an of block is taken in maximum range that can be received piece
The sum of the block of cutting, and block message is sent to client.
File fragmentation module: each big file is pressed the size of block, is cut into each and every one several file fragments, server end
It completes the transmission of file data and notifies client.Client receives duration according to the size of block is default, delays, tests in setting
Demonstrate,prove the integrality of a reception block；If fruit block is complete, temporary file will be written；If fruit block is imperfect, will be lost according to message in block
Situation is lost to message server request retransmission entire block or lacked.
Send thread management module: received server-side will be requested to when the request for retransmitting entire block or the message lacked
The block number or message numbering of repeating transmission notify to find the transmission block by sending thread management module to thread management module is sent
Or the UDP of the message lacked sends thread, notice UDP sends thread and retransmits.
Block adjusts module: the size for adjusting transmission block carrys out fine granularity adjustment transmission rate.Client receives all texts
When part segment, file will be reorganized according to file fragment description information by file combination module.
Based on system and method for the invention, in order to provide the terminal with multimedia reliable, quick, that network capabilities is adaptive
Content distribution service, the present invention further devise the content rapid transport protocol based on UDP.
Reliable transport protocol based on UDP is to introduce congestion control, flow control and data on the transport layer of UDP
Control for Dependability mechanism, be it is a kind of end to end, it is connection-oriented, the transmitted in both directions agreement reliably guaranteed is provided.The agreement exists
Transport layer transmits user data and Protocol Control Information based entirely on udp protocol, using UDP.The agreement, which uses, is based on packet sequence
Packet loss is detected, and guarantees data reliability.Reliable transport protocol based on UDP is the application layer transmission association to Transmission Control Protocol close friend
View.The transport protocol is directed to high BDP network design, can quickly increase transmission rate, quickly utilizes bandwidth.These features are very
It is suitable for the demand for pushing away the business of broadcasting to transport protocol.
Since UDP is connectionless transport protocol, for the reliability of improve data transfer, the reliable transmission based on UDP
Agreement is designed to connection-oriented duplex protocol, for this purpose, each the reliable transport protocol entity based on UDP includes sending mould
Block and receiving module two parts, sending module and receiving module share the same udp port, send and receive number using the port
According to.After transmission connection is established, the sending module of transmitting terminal is responsible for sending datagram, and the receiving module of transmitting terminal is responsible for connecing
The control message that receiving end is sent, the receiving module of receiving end are responsible for receiving control message and data message, i.e. control data are being sent out
The transmission of two receiving modules of sending end and receiving end.Receiving module is responsible for triggering simultaneously, handles various control events.
In high BDP network, the product increase of bandwidth and delay means that the non-receiving end that can be resident in network is true
The number of data packets recognized increases, and sends window and needs to become very big, and traditional TCP congestion control, for individually wrapping
Sending rate control, the data packet sent in window are sent simultaneously away, and after sending window and becoming larger, this strategy may be made
At the flash crowd of router.In order to solve this problem, it is different that transmission window adjusting transmission rate is used only from TCP, the agreement
Rate control (rate control) and window control (window control, also referred to as flow control) is combined, rate control
Adjustment is given out a contract for a project the period, and flow control uses specific threshold, and limitation has been sent but the quantity of non-receiving end confirmation packet.Carry out
When window control, which determines with the following method sends window size:
W=AS × (SYN+RTT)
In above formula, AS is the packet arrival rate that receiving end calculates.Since receiving end is not to receive each packet to send
ACK confirmation message, but every SYN time sends an ACK confirmation message, SYN+RTT represent transmitting terminal from transmitting packets to
Receive the maximum time interval of the ACK confirmation message of the packet, the product of the time interval and packet sending speed represents transmitting terminal
Maximum amount of data can send, not confirmed.
Reliable transport protocol based on UDP uses the congestion avoidance algorithm based on DAIMD, DAIMD congestion control mechanism
Basic thought is: under not packet drop, adjusting the period with fixed rate, transmission rate increases α (x), when congestion occurs for network
When, packet sending speed is reduced to original (1-b) times.
Assuming that the least link of available bandwidth appears in b sections of network link, the network on one article of network transmission path
Available bandwidth of the path in a certain period [t, t+ σ]: A0~N(t,t+σ)
S is the reliable transmission packet size based on UDP, and unit is byte；SYN is the rate control of the reliable transmission based on UDP
Period processed is 0.01s；τ is protocol parameter, and τ is fixed value 9.According to formula (3-1), transmission rate is every to improve 10 times, transmitting terminal speed
Rate increment is reduced to original 1/10th.In the reliable transport protocol based on UDP, multiplication reduces the factor and takes b=0.125.
Reliable transport protocol based on UDP can using the mechanism guarantee data such as timing re-transmission, packet receiving confirmation, packet loss confirmation
By transmission.Reliable transport protocol based on UDP uses the selective acknowledgement mechanism based on timer, and receiving end is arranged packet receiving and confirms
Timer (ACK Timer), per fixed cycle send a confirmation packet (ACK), realize maximum paid-in to receiving end, continuous
The selective acknowledgement of the data packet of serial number.Receiving end reception speed is faster, and the ack msg packet needed is fewer.In order to avoid multiple
Identical ACK packet is sent, transmitting terminal often receives an ACK packet, can all generate a confirmation packet ACK2 to ACK packet, receiving end
Receive ACK2 packet, it is possible to determine that when packet receiving confirmation timer overflows, if need to send a new ACK packet.Based on UDP
Reliable transport protocol using packet loss confirmation the accurate feedback receiving end (Negative Acknowledgment, NAK) packet loss
Situation, packet loss confirmation are equally based on timer, referred to as packet loss timer (NAK Timer).Reliable transmission based on UDP is each
It is larger to first check for sequence number when receiving end receives non-two arrived sequentially at data packet for data packet setting sequence number
The non-data packet arrived sequentially at serial number whether in packet loss list, if the serial number in packet loss list, from
The serial number is deleted in packet loss list；Otherwise, all data packet serial numbers not received before the serial number are put into packet loss column
Table.When packet loss timer overflows, if packet loss chained list is not sky, all serial numbers in packet loss list are sent transmission by receiving end
End.Retransmission timer (Expire Timer) is arranged in transmitting terminal, when retransmission timer overflows, triggers the re-transmission of a data packet.
The timing cycle RCTP of ACK timer is fixed value 0.01 second, and the timing cycle NTP of NAK timer is arranged to the RTT of three times
The timing cycle of size, retransmission timer is arranged to:
ETP=3 × RTT+RCTP.
Reliable transport protocol connection based on UDP is established and data transmission flow is as shown in Figure 4.
Firstly, agreement is based on by handshake request (Handshake REQ) and confirmation (HandshakeACK) foundation of shaking hands
The reliable transmission of UDP connects, and when establishing connection, both sides can negotiate relevant parameter, such as protocol version, data package size.It sends
Hold some SYN period transmit Sequence Number for 1,2,3 data packet.Receiving end sends the ACK of an ACK=3 in the RCTP period
Message.
Next SYN period (is referred to as second SYN period below, but is not to establish the reliable transmission connection based on UDP
Second, and so on), the period SNDTP that gives out a contract for a project is adjusted according to rate control algorithm, and SNDTP becomes smaller.At second
SYN cycle, transmitting terminal transmit Sequence Number for 4,5,6,7 data packet, while receiving the ACK packet of ACK=3, transmitting terminal is vertical
Send the ACK2 packet of an ACK2=3.In second SYN period of above procedure, the packet loss of Serial No. 4,6 is received
Termination receives the data packet of Serial No. 5,7, and sequence number 4 and 6 is added and loses list.When NAK timer overflows, receiving end
Send the NAK message of NAK=4,6.After receiving end receives the ACK2 packet of ACK2=3, when ACK timer overflows, due to sequence
The Bao Wei that row number is 4 is received, therefore does not retransmit ACK packet.
In the third SYN period, receiving end receives NAK=4,6 NAK message, receiving end according to rate adjustment algorithm,
The data packet that SNDTP is increased, and is transmitted Sequence Number again as 4 and 6.Receiving end receives the two data packets, in third
The ATP period, receiving end sent the ACK packet of ACK=7 to constantly.After transmitting terminal receives the ACK packet of ACK=7, recover immediately
The ACK2 packet of ACK2=7.When no data are sent, every ETP period sends a keep-alive packet (keepalive), when for 3 seconds
Keep-alive packet is not received, then then sends end packet (FIN) within 3 seconds, connection disconnects.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen within the scope of claims of the present invention.
Claims (10)
1. a kind of method of rate control of 3D content distribution platform, which comprises the following steps:
Step 1, it is contemplated that calculate the sum of the block of file fragment cutting；
Each big file is cut into each and every one several file fragments by the size of block by step 2；
Step 3, server end complete the transmission of file data and notify client；
Step 4, client receive duration according to the size of block is default, delay in setting, verify the complete of a reception block
Property；If fruit block is complete, temporary file will be written；If fruit block is imperfect, will be requested according to message loss situation in block to server
The message for retransmitting entire block or lacking；
Step 5, the message for retransmitting entire block or lacking；
Step 6, server end adjust module by block and adjust the size of transmission block come fine granularity adjustment transmission rate；
Step 7 when client receives all file fragments, will describe to believe by file combination module according to file fragment
Breath reorganizes file.
2. the method for rate control of 3D content distribution platform as described in claim 1, which is characterized in that step 1 is further wrapped
It includes:
Client initiates file content acquisition request, received piece of maximum value of energy is issued server end, server end is in block
Maximum range in take a block size precomputation file fragment cutting block sum, and block message is sent to client
End.
3. the method for rate control of 3D content distribution platform as described in claim 1, which is characterized in that step 2 is further wrapped
It includes:
Server end completes the cutting of big file by file fragmentation module, each big file is cut into 1 by the size of block
~N number of file fragment；
Each file fragment is made of 1~M block, and each piece is made of 1~L message, and each piece and message have
One mark, the mark of block have uniqueness in affiliated file fragment, and message identification also has unique in affiliated block
Property.
4. the method for rate control of 3D content distribution platform as described in claim 1, which is characterized in that step 3 is further wrapped
It includes:
Server end by UDP send thread complete file data transmission, using udp protocol according to message serial number from it is small to
The block message of each file fragment is sent to client by big sequence.
5. the method for rate control of 3D content distribution platform as described in claim 1, which is characterized in that step 5 is further wrapped
It includes:
Received server-side is to when the request for retransmitting entire block or the message lacked, by the block number or message numbering of request repeat
Notify that the UDP that the transmission block or the message lacked are found by sending thread management module is sent to thread management module is sent
Thread notifies the UDP to send thread and retransmit.
6. the method for rate control of 3D content distribution platform as described in claim 1, which is characterized in that step 6 is further wrapped
It includes:
Block adjustment module is timed to the repeating transmission request record of client in repeating management module polls this period, then arrives transmission
Thread management module is inquired in this period and has been issued to the block of client or the record of message, according to request repeat and has sent
Ratio decide whether the size of adjustment block, when server end has adjusted the size of block, adjustment result notice TCP is received and dispatched line
Journey retransmits block message notice client by TCP receiving or sending thread.
7. a kind of speed control system of 3D content distribution platform, including server and client side, it is characterised in that:
The server includes multiple content distribution subsystems, and the content distribution subsystem includes block message synchronization module, text
Part fragment module sends thread management module, block adjustment module；
The block message synchronization module takes the size precomputation file fragment an of block in maximum range that can be received piece
The sum of the block of cutting, and block message is sent to client；
The file fragmentation module presses each big file the size of block, is cut into each and every one several file fragments；
Server end completes the transmission of file data and notifies client；
Client receives duration according to the size of block is default, delays in setting, verifies the integrality of a reception block；Such as fruit block
Completely, temporary file will be written；It, will be according to message loss situation in block to the entire block of server request retransmission if fruit block is imperfect
Or the message lacked；
Received server-side is to when the request for retransmitting entire block or the message lacked, by the block number or message numbering of request repeat
It notifies to find the UDP of the transmission block or the message lacked by sending thread management module to the transmission thread management module
Thread is sent, the UDP is notified to send thread and retransmit；
The size of described piece of adjustment module adjustment transmission block carrys out fine granularity adjustment transmission rate；
It, will be according to file fragment description information again group by file combination module when client receives all file fragments
Knit file.
8. the speed control system of 3D content distribution platform as claimed in claim 7, it is characterised in that:
The file fragmentation module presses each big file the size of block, is cut into 1~N number of file fragment；Each text
Part segment is made of 1~M block, and each piece is made of 1~L message, and each piece and message have a mark, the mark of block
Know has uniqueness in affiliated file fragment, and message identification also has uniqueness in affiliated block.
9. the speed control system of 3D content distribution platform as claimed in claim 7, it is characterised in that:
Client receives duration according to the size of block is default, delays in setting, verifies the integrality of a reception block；Such as fruit block
Completely, temporary file will be written；If fruit block is imperfect, will be asked using Transmission Control Protocol to server according to message loss situation in block
Seek the message for retransmitting entire block or lacking.
10. the speed control system of 3D content distribution platform as claimed in claim 7, it is characterised in that:
Block adjustment module is timed to the repeating transmission request record of client in repeating management module polls this period, then arrives transmission
Thread management module is inquired in this period and has been issued to the block of client or the record of message, according to request repeat and has sent
Ratio decide whether the size of adjustment block, when server end has adjusted the size of block, adjustment result notice TCP is received and dispatched line
Journey retransmits block message notice client by TCP receiving or sending thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711440594.8A CN109981693A (en) | 2017-12-27 | 2017-12-27 | The method of rate control and system of 3D content distribution platform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711440594.8A CN109981693A (en) | 2017-12-27 | 2017-12-27 | The method of rate control and system of 3D content distribution platform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109981693A true CN109981693A (en) | 2019-07-05 |
Family
ID=67071001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711440594.8A Pending CN109981693A (en) | 2017-12-27 | 2017-12-27 | The method of rate control and system of 3D content distribution platform |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109981693A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355929A (en) * | 2020-03-09 | 2020-06-30 | 江苏经贸职业技术学院 | Public welfare system and method based on electronic commerce |
| CN112073386A (en) * | 2020-08-18 | 2020-12-11 | 浙江鸿城科技有限责任公司 | Window-free randomly-selectable file transmission method based on UDP (user Datagram protocol) |
| CN112738096A (en) * | 2020-12-29 | 2021-04-30 | 湖南博匠信息科技有限公司 | Efficient and reliable data transmission method and system |
| CN114553783A (en) * | 2022-02-23 | 2022-05-27 | 湖南工学院 | Load balancing method for self-adaptive rectifying cell granularity of data center network |
| CN115150383A (en) * | 2021-03-31 | 2022-10-04 | 华为技术有限公司 | File transmission method, device and computer readable storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102938791A (en) * | 2012-11-22 | 2013-02-20 | 上海文广互动电视有限公司 | Information-transmission-rate-adaptive-control file transferring method for 3D (Three-Dimensional) television content |
| CN104065643A (en) * | 2014-05-07 | 2014-09-24 | 上海文广互动电视有限公司 | Method and system of multimedia network transmission based on tree logic |
| US20150143438A1 (en) * | 2012-05-14 | 2015-05-21 | Lg Electronics Inc. | Media control device, media renderer device, media server device, and method for operating the devices |
-
2017
- 2017-12-27 CN CN201711440594.8A patent/CN109981693A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150143438A1 (en) * | 2012-05-14 | 2015-05-21 | Lg Electronics Inc. | Media control device, media renderer device, media server device, and method for operating the devices |
| CN102938791A (en) * | 2012-11-22 | 2013-02-20 | 上海文广互动电视有限公司 | Information-transmission-rate-adaptive-control file transferring method for 3D (Three-Dimensional) television content |
| CN104065643A (en) * | 2014-05-07 | 2014-09-24 | 上海文广互动电视有限公司 | Method and system of multimedia network transmission based on tree logic |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111355929A (en) * | 2020-03-09 | 2020-06-30 | 江苏经贸职业技术学院 | Public welfare system and method based on electronic commerce |
| CN111355929B (en) * | 2020-03-09 | 2021-10-26 | 江苏经贸职业技术学院 | Information transmission method based on advertisement player |
| CN112073386A (en) * | 2020-08-18 | 2020-12-11 | 浙江鸿城科技有限责任公司 | Window-free randomly-selectable file transmission method based on UDP (user Datagram protocol) |
| CN112738096A (en) * | 2020-12-29 | 2021-04-30 | 湖南博匠信息科技有限公司 | Efficient and reliable data transmission method and system |
| CN115150383A (en) * | 2021-03-31 | 2022-10-04 | 华为技术有限公司 | File transmission method, device and computer readable storage medium |
| CN115150383B (en) * | 2021-03-31 | 2023-07-07 | 华为技术有限公司 | File transmission method, apparatus and computer readable storage medium |
| CN114553783A (en) * | 2022-02-23 | 2022-05-27 | 湖南工学院 | Load balancing method for self-adaptive rectifying cell granularity of data center network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109981693A (en) | The method of rate control and system of 3D content distribution platform | |
| CN110995697B (en) | Big data transmission method and system | |
| DE60211335T2 (en) | Real-time packetization and re-transmission in streaming applications | |
| US5905871A (en) | Method of multicasting | |
| CN102685204B (en) | Method and equipment for transmitting data resource | |
| CN104065643A (en) | Method and system of multimedia network transmission based on tree logic | |
| CN101656756B (en) | File transferring method with self-adaptive control of transmission speed and system thereof | |
| RU2634908C2 (en) | Method and device for mediadata delivery management | |
| CN113271316B (en) | Multimedia data transmission control method and device, storage medium and electronic equipment | |
| CN109889543A (en) | Method, root node, child node, P2P server and the system of transmission of video | |
| CN106850595A (en) | A kind of streaming media optimization method and device | |
| CN109560901A (en) | A kind of data repeating method, device, terminal device and storage medium | |
| CN104768081B (en) | A kind of packet loss repeating method for realizing flow control | |
| WO2002030067A1 (en) | Packet retransmission system, packet transmission device, packet reception device, packet retransmission method, packet transmission method and packet reception method | |
| CN103780971A (en) | RUDP-based real-time video transmission method under internet condition | |
| CN106341738A (en) | Streaming media network transmission bandwidth calculation method, server and system | |
| CN109067796A (en) | A kind of data transmission method and device | |
| Bhat et al. | Improving QoE of ABR streaming sessions through QUIC retransmissions | |
| CN107295364B (en) | For the real-time streaming transport control method of barrage video, control device | |
| CN102938791A (en) | Information-transmission-rate-adaptive-control file transferring method for 3D (Three-Dimensional) television content | |
| WO2016026299A1 (en) | Method and device for retransmitting lost packet | |
| CN106454553A (en) | A precise time delay live video network transmission control method | |
| Ahmad et al. | Enhancing fast TCP’s performance using single TCP connection for parallel traffic flows to prevent head-of-line blocking | |
| CN105357088B (en) | Efficient system network transfer method under the interactive medium service environment of cloud framework | |
| CN110225419A (en) | A kind of packet loss repeating method for realizing flow control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190705 |
|
| RJ01 | Rejection of invention patent application after publication |