CN110351197A - Data transmission method and relevant apparatus - Google Patents

Data transmission method and relevant apparatus Download PDF

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Publication number
CN110351197A
CN110351197A CN201810304448.0A CN201810304448A CN110351197A CN 110351197 A CN110351197 A CN 110351197A CN 201810304448 A CN201810304448 A CN 201810304448A CN 110351197 A CN110351197 A CN 110351197A
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China
Prior art keywords
node
mtu value
multicast
multicast source
value
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CN201810304448.0A
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CN110351197B (en
Inventor
孙春霞
张耀坤
张可超
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN201810304448.0A priority Critical patent/CN110351197B/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/36—Flow control; Congestion control by determining packet size, e.g. maximum transfer unit [MTU]
    • 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 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6125—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via Internet
    • 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
    • H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
    • H04N21/64784—Data processing by the network

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

The embodiment of the present application provides a kind of data transmission method and relevant apparatus, wherein, the above method includes: that head node sends the notice message for carrying the first maximum transmission unit MTU to multicast source, so that multicast source carries out fragment to multicast data message before sending multicast data message, according to the first MTU value；Wherein, the first MTU value that above-mentioned notice message carries is the MTU value determined according to multicast source by the MTU value of the outgoing interface of each node between the head node and each terminal；Above-mentioned head node receives multicast source according to the multicast data message of above-mentioned first MTU value fragment.Implementing the embodiment of the present application can allow to pass through any one node-node transmission in transmission path according to the multicast data message after above-mentioned first MTU value fragment to terminal, shorten the drainage time delay in playing process, improve the phenomenon that card shields, promote user experience.

Description

Data transmission method and relevant apparatus
Technical field
This application involves network communication technology field more particularly to a kind of data transmission methods and relevant apparatus.
Background technique
Broadband TV (Broadband TV, BTV) multicast service has very high requirement to channel switching drainage time delay, that is, uses The flower screen or card screen that family does not allow to occur in visual effect in switching channels.The Internet group that this requires issue from set-top box Management agreement (Internet Group Management Protocol, IGMP), which joins message, reaches machine top to flux of multicast Box, the end-to-end time delay between this cannot be too long.
But in sixth version internet protocol (Internet Protocol version 6, IPv6) multicast, due to IPv6 Do not support intermediate forwarding fragment, multicast source can allow according to oneself outgoing interface when sending multicast data message by maximum number According to the size of packet, i.e. maximum transmission unit (Maximum Transmission Unit, MTU) value assembles message, is forwarded to centre When node, if intermediate node forward IPv6 message when discovery message length be more than outgoing interface MTU value, by packet loss and to Multicast source sends (the Internet Control Message Protocol version of Internet Control Message Protocol the 6th edition 6, ICMPv6) too big message, carries the MTU value of oneself outgoing interface in too big message, and multicast source can learn after receiving To small MTU value assembling message and multicast data message is sent, successively repeatedly, until tail node receives multicast data message.It is whole A process takes a long time, it is possible that extending when drainage, blocking the phenomenon that screen.
Summary of the invention
The embodiment of the present application provides a kind of data transmission method, head node, leaf node, multicast source, data transmission system And computer readable storage medium, it can be in IPv6 multicast, the phenomenon that shortening drainage time delay and improve card screen.
In a first aspect, the embodiment of the present application provides a kind of data transmission method, it is applied to multicast network, the multicast network Network includes multicast source and multiple nodes, and the multicast source sends multicast data message to each terminal by the multiple node, The multiple node includes head node, and the head node is the routing forwarding equipment close to the multicast source, and the method is by institute State head node execution, which comprises the head node sends the notice message for carrying the first MTU value to the multicast source, So that the multicast source carries out the multicast data message before sending multicast data message, according to first MTU value Fragment；Wherein, the first MTU value that the notice message carries is according to the multicast source by the head node and each end The MTU value that the MTU value of the outgoing interface of each node between end determines；The head node receives the multicast source according to described the The multicast data message of one MTU value fragment.
Implementing the embodiment of the present application can make multicast source before sending multicast data message, according to the of head node transmission One MTU value carries out fragment to multicast data message, so that can be suitable according to the multicast data message after above-mentioned first MTU value fragment Benefit shortens the drainage time delay in playing process by any one node-node transmission in transmission path to terminal, improves card screen Phenomenon promotes user experience.
In an optional implementation, first MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal.
It is described according to first MTU value to the multicast data message carry out fragment include: according to the multicast source pass through The MTU value of the outgoing interface for each node crossed between the head node and each terminal obtains the outgoing interface of each node Minimum value in MTU value；The data message is divided according to the minimum value in the MTU value of the outgoing interface of each node Piece.
In implementing the embodiment of the present application, the MTU value of the outgoing interface of each node is sent from head node to multicast source, so that Multicast source determines that the MTU value of fragment carries out fragment to multicast data message from multiple MTU values, the multicast number after guaranteeing fragment Any one node-node transmission in transmission path can be passed through to terminal according to message, shorten the drainage time delay in playing process, Improve card screen phenomenon, promotes user experience.
In an optional implementation, first MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal.
It is described according to first MTU value to the multicast data message carry out fragment include: according to each node Outgoing interface MTU value in minimum value to the data message carry out fragment.
In the embodiment of the present application, determine that minimum value is sent to from the MTU value of the outgoing interface of each node by head node It is any one in transmission path to guarantee that multicast source can be passed through according to the multicast data message after the MTU value fragment for multicast source A node-node transmission shortens the drainage time delay in playing process to greatest extent, utmostly improves card screen phenomenon, substantially mention to terminal Rise user experience.
In an optional implementation, the head node sends the notice for carrying the first MTU value to the multicast source Message includes: that Xiang Suoshu multicast source, which is sent, carries first in the case where the head node monitors that new multicast channel is added The notice message of MTU value.
The embodiment of the present application provides a kind of head node and sends the triggering item for carrying the notice message of MTU value to multicast source Part, when monitoring that new multicast channel is added, triggering head node sends the notice message for carrying MTU value to multicast source, protects Card drainage time delay when new multicast channel is added is short, and broadcasting pictures are smooth, and user experience is good.
In an optional implementation, the head node monitors that new multicast channel addition includes: the cephalomere Point receives the C multicast message that leaf node is sent, and the C multicast message carries the destination address of multicast channel, and the head node The multicast data message of the multicast channel of the destination address characterization is not received.
The embodiment of the present application provides a kind of method for monitoring new multicast channel and being added, when head node receives leaf node The C multicast message of transmission, and head node is not connected to the multicast data message of the multicast channel of C multicast message characterization currently, then Show that the multicast channel is newly added, triggering head node sends the notice message for carrying MTU value to multicast source, so that multicast source The phenomenon that according to the MTU value to multicast data message fragment, shortening the drainage time delay in playing process, improving card screen, is promoted and is used Family experience.
In an optional implementation, the head node monitors that new multicast channel addition includes: the cephalomere Point receives the Multicast Group Registration message of leaf node transmission, wherein the head node is meeting point.
The embodiment of the present application provides another method for monitoring new multicast channel and being added, when head node also serves as set Point when receiving the Multicast Group Registration message of leaf node transmission, shows have new multicast channel to be added, triggers head node to multicast Source sends the notice message for carrying MTU value so that multicast source according to the MTU value to multicast data message fragment, shortening played Drainage time delay in journey improves the phenomenon that card shields, and promotes user experience.
In an optional implementation, the head node monitors that new multicast channel addition includes: the cephalomere Point receives the multicast information that the multicast source is sent；Wherein, the head node configures Multicast Source Discovery Protocol.
The embodiment of the present application provides another method for monitoring new multicast channel and being added, when head node configures multicast source It was found that agreement, when receiving the multicast information of multicast source transmission, shows have new multicast channel to be added, triggers head node to multicast Source sends the notice message for carrying MTU value so that multicast source according to the MTU value to multicast data message fragment, shortening played Drainage time delay in journey improves the phenomenon that card shields, and promotes user experience.
In an optional implementation, the notice for carrying the first MTU value is sent described in the head node to multicast source Message includes: that the head node periodically sends the notice message for carrying the first MTU value to multicast source.
The embodiment of the present application provides another head node and sends the triggering item for carrying the notice message of MTU value to multicast source Part, i.e. head node periodically send the notice message for carrying MTU value to multicast source, so that multicast source is according to the MTU value to multicast Data message fragment prevents multicast source from losing the first MTU value of the head node, guarantees that the drainage time delay in playing process is short, broadcasts Picture smoothness is put, user experience is good.
In an optional implementation, the head node sends the notice for carrying the first MTU value to the multicast source Message includes: in the case where the head node monitors that first MTU value changes, and the head node is sent out to multicast source Send the notice message for carrying the first MTU value.
The embodiment of the present application provides another head node and sends the triggering item for carrying the notice message of MTU value to multicast source Part, in the case where head node monitors that the first MTU value changes, triggering head node sends to multicast source and carries MTU value Notice message guarantees that the drainage time delay in playing process is short, and broadcasting pictures are smooth, and user experience is good.
Second aspect, the embodiment of the present application provide a kind of data transmission method, are applied to multicast network, the multicast network Network includes multicast source and multiple nodes, and the multicast source sends multicast data message to each terminal by the multiple node, The multiple node includes head node and leaf node, and the head node is the routing forwarding equipment close to the multicast source, described Leaf node is the routing forwarding equipment close to the terminal, and the method is executed by the head node, which comprises described Head node sends the second notice message for carrying the second maximum transmission unit MTU value to the multicast source, so that the multicast source Before sending multicast data message, the second MTU value and third notice message carried according to second notice message is carried Third MTU value determine fragment MTU value, the third notice message is the notice report that the leaf node is sent to the multicast source Text, the third notice message carry the third MTU value；Wherein, the second MTU value that second notice message carries is root According to the multicast source by the MTU of the outgoing interface of each node between the head node and each terminal in addition to leaf node It is worth determining MTU value, the third MTU value that the third notice message carries is the MTU value of the outgoing interface of the leaf node；It is described Head node receives the multicast source according to the multicast data message of the fragment MTU value fragment.
The embodiment of the present application is sent the notice message for carrying MTU value, cephalomere from head node and leaf node to multicast source respectively The third MTU value that the third notice message that the second MTU value and leaf node that the second notice message that point is sent carries are sent carries Multicast source is covered by the MTU value of the outgoing interface of all nodes between the head node and each terminal, it is ensured that after fragment Multicast data message can pass through any one node-node transmission in transmission path to terminal, shorten drawing in playing process Time delay is flowed, improves card screen phenomenon, promotes user experience.
In an optional implementation, second MTU value be the multicast source by the head node with it is described The MTU value of each node outgoing interface between each terminal in addition to leaf node；It is described according to second notice message carry The third MTU value that second MTU value and third notice message carry determines that fragment MTU value includes: according to the multicast source by institute State the outgoing interface of each node between head node and each terminal in addition to the leaf node MTU value and the leaf segment The outgoing interface MTU value of point obtains in the MTU value of the outgoing interface of each node and the MTU value of the outgoing interface of the leaf node Minimum value；The minimum value is the fragment MTU value.
In an optional implementation, second MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal in addition to leaf node；It is described logical according to described second Know that the second MTU value that message carries and the third MTU value that third notice message carries determine that fragment MTU value includes: according to Multicast source passes through in the MTU value of each node outgoing interface between the head node and each terminal in addition to leaf node most The MTU value of the outgoing interface of small value and the leaf node obtains the outgoing interface of each node including the leaf node Minimum value in MTU value；The minimum value is the fragment MTU value.
The third aspect, the embodiment of the present application provide a kind of data transmission method, are applied to multicast network, the multicast network Network includes multicast source and multiple nodes, and the multicast source sends multicast data message to each terminal by the multiple node, The multiple node includes head node and leaf node, and the head node is the routing forwarding equipment close to the multicast source, described Leaf node is the routing forwarding equipment close to the terminal, and the method is executed by the leaf node, which comprises described Leaf node sends the third notice message for carrying third maximum transmission unit MTU value to the multicast source, so that the multicast source The second MTU value carried before sending multicast data message according to the second notice message and the third notice message carry Third MTU value determine fragment MTU value, second notice message is the notice report that the head node is sent to the multicast source Text, second notice message carry second MTU value；Wherein, the second MTU value that second notice message carries is root According to the multicast source by the MTU of the outgoing interface of each node between the head node and each terminal in addition to leaf node It is worth determining MTU value；The third MTU value that the third notice message carries is the MTU value of the outgoing interface of the leaf node；It is described Leaf node receives the multicast source according to the multicast data message of the fragment MTU value fragment.
The embodiment of the present application is sent the notice message for carrying MTU value, cephalomere from head node and leaf node to multicast source respectively The third MTU value that the third notice message that the second MTU value and leaf node that the second notice message that point is sent carries are sent carries Multicast source is covered by the MTU value of the outgoing interface of all nodes between the head node and each terminal, it is ensured that after fragment Multicast data message can pass through any one node-node transmission in transmission path to terminal, shorten drawing in playing process Time delay is flowed, improves card screen phenomenon, promotes user experience.
In an optional implementation, second MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal in addition to leaf node；The carried according to the second notice message The third MTU value that two MTU values and the third notice message carry determines that fragment MTU value includes: to pass through according to the multicast source The MTU value of the outgoing interface of each node between the head node and each terminal in addition to leaf node and the leaf node Outgoing interface MTU value obtain each node outgoing interface MTU value and the leaf node outgoing interface MTU value in Minimum value；The minimum value is the fragment MTU value.
In the embodiment of the present application, head node sends the MTU value of the outgoing interface of each node in addition to leaf node, leaf to multicast source Node sends the MTU value of its outgoing interface to multicast source, so that multicast source determines fragment from the multiple MTU values received MTU value carries out fragment to multicast data message, and the multicast data message after guaranteeing fragment can pass through appointing in transmission path A node-node transmission anticipate to terminal, shortens the drainage time delay in playing process, improves card screen phenomenon, promote user experience.
In an optional implementation, second MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal in addition to leaf node；It is described to be reported according to the second notice The third MTU value that the second MTU value and the third notice message that text carries carry determines that fragment MTU value includes: according to In MTU value of the multicast source by the outgoing interface of each node between the head node and each terminal in addition to leaf node The MTU value of the outgoing interface of minimum value and the leaf node obtains the outgoing interface of each node including the leaf node Minimum value in MTU value；The minimum value is the fragment MTU value.
In the embodiment of the present application, head node is determined most from the MTU value of the outgoing interface of each node in addition to leaf node Small value is sent to multicast source, and leaf node sends the MTU value of its outgoing interface to multicast source, so that multicast source is from two received Determine that fragment MTU value carries out fragment to multicast data message in MTU value, the multicast data message after guaranteeing fragment can smoothly lead to Any one node-node transmission in transmission path is crossed to terminal, shortens the drainage time delay in playing process, maximum journey to greatest extent Degree improves card screen phenomenon, and user experience is substantially improved.
In an optional implementation, the leaf node sends the third for carrying third MTU value to the multicast source Notice message includes: that Xiang Suoshu multicast source, which is sent, to be carried in the case where the leaf node monitors that new multicast channel is added The third notice message of third MTU value.
The embodiment of the present application provides a kind of leaf node and sends the triggering item for carrying the notice message of MTU value to multicast source Part, when monitoring that new multicast channel is added, triggering leaf node sends the notice message for carrying MTU value to multicast source, protects Card drainage time delay when new multicast channel is added is short, and broadcasting pictures are smooth, and user experience is good.
In an optional implementation, the leaf node monitors that new multicast channel addition includes: the leaf segment Point receives the multicast channel that terminal is sent and request is added, and the destination address that request carries multicast channel is added in the multicast channel, And the leaf node does not receive the multicast data message of the multicast channel of the destination address characterization.
The embodiment of the present application provides a kind of method for monitoring new multicast channel and being added, when leaf node receives terminal hair Request is added in the multicast channel sent, and leaf node is not connected to the multicast data message of the multicast channel of request characterization currently, then Show that the multicast channel is newly added, triggering leaf node sends the notice message for carrying MTU value to multicast source, so that multicast source The phenomenon that according to the MTU value to multicast data message fragment, shortening the drainage time delay in playing process, improving card screen, is promoted and is used Family experience.
In an optional implementation, the leaf node sends the third for carrying third MTU value to the multicast source Notice message includes: that the leaf node periodically sends the third notice message for carrying third MTU value to the multicast source.
The embodiment of the present application provides another leaf node and sends the triggering item for carrying the notice message of MTU value to multicast source Part, i.e. leaf node periodically send the notice message for carrying MTU value to multicast source, so that multicast source is according to the MTU value to multicast Data message fragment prevents multicast source from losing the MTU value of the leaf node outgoing interface, guarantees that the drainage time delay in playing process is short, Broadcasting pictures are smooth, and user experience is good.
In an optional implementation, the leaf node sends the third for carrying third MTU value to the multicast source Notice message includes: the leaf in the case where the leaf node monitors that the MTU value of the leaf node outgoing interface changes Node sends the third notice message for carrying third MTU value to the multicast source.
The embodiment of the present application provides another leaf node and sends the triggering item for carrying the notice message of MTU value to multicast source Part, when leaf node monitors that the MTU value of its outgoing interface changes, triggering leaf node sends to multicast source and carries MTU value Notice message guarantees that the drainage time delay in playing process is short, and broadcasting pictures are smooth, and user experience is good.
Fourth aspect, the embodiment of the present application provide a kind of data transmission method, are applied to multicast network, the multicast network Network includes multicast source and multiple nodes, and the multicast source sends multicast data message to each terminal by the multiple node, The multiple node includes head node, and the head node is the routing forwarding equipment close to the multicast source, and the method is by institute State multicast source execution, which comprises the multicast source receives the head node and send before sending multicast data message The first MTU value of carrying notice message；Wherein, the first MTU value that the notice message carries is passed through according to the multicast source Cross the MTU value that the MTU value of the outgoing interface of each node between the head node and each terminal determines；The multicast source root Fragment is carried out to multicast data message according to the first MTU value that the notice message carries；The multicast source is by the multicast after fragment Data message is sent to the head node.
In an optional implementation, first MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal；The method further includes: the multicast source is according to the multicast Source obtains the outgoing interface of each node by the MTU value of the outgoing interface of each node between the head node and each terminal MTU value in minimum value；The multicast source carries out multicast data message according to the first MTU value that the notice message carries Fragment include: the multicast source according to the minimum value in the MTU value of the outgoing interface of each node to the multicast datagram Text carries out fragment.
In an optional implementation, first MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal；The multicast source is carried according to the notice message The first MTU value to multicast data message carry out fragment include: MTU of the multicast source according to the outgoing interface of each node Minimum value in value carries out fragment to the multicast data message.
5th aspect, the embodiment of the present application provide a kind of data transmission method, are applied to multicast network, the multicast network Network includes multicast source and multiple nodes, and the multicast source sends multicast data message to each terminal by the multiple node, The multiple node includes head node and leaf node, and the head node is the routing forwarding equipment close to the multicast source, described Leaf node is the routing forwarding equipment close to the terminal, and the method is executed by the multicast source, which comprises described Multicast source receives the second notice message of carrying the second maximum transmission unit MTU value that the head node is sent；Wherein, described The second MTU value that two notice messages carry is passed through between the head node and each terminal according to the multicast source except leaf segment The MTU value that the MTU value of the outgoing interface of each node except point determines；The multicast source receives the carrying that the leaf node is sent The third notice message of third MTU value；Wherein, the third MTU value that the third notice message carries is going out for the leaf node The MTU value of interface；The multicast source determines fragment MTU value according to second MTU value and the third MTU value；The multicast Source carries out fragment to multicast data message according to the fragment MTU value；The multicast source is by the multicast datagram after the fragment Text is sent to the head node.
In an optional implementation, second MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal in addition to leaf node；The fragment MTU value is multicast source process The MTU value of the outgoing interface of each node between the head node and each terminal in addition to leaf node and the leaf node Minimum value in the MTU value of outgoing interface.
In an optional implementation, second MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal in addition to leaf node；The fragment MTU value is described Minimum value in second MTU value and third MTU value.
6th aspect, the embodiment of the present application provide a kind of head node, are applied to multicast network, and the multicast network includes Multicast source and multiple nodes, the multicast source sends multicast data message to each terminal by the multiple node, the multiple Node includes head node, and the head node is the routing forwarding equipment close to the multicast source, and the head node includes: the first hair Unit is sent, for sending the notice message for carrying the first MTU value to the multicast source, so that the multicast source is sending multicast number Before message, fragment is carried out to the multicast data message according to first MTU value；Wherein, the notice message carries The first MTU value be outgoing interface according to the multicast source by each node between the head node and each terminal The MTU value that MTU value determines；First receiving unit, for receiving the multicast source according to the multicast number of the first MTU value fragment According to message.
In an optional implementation, first MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal.
In an optional implementation, first MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal.
In an optional implementation, first transmission unit is for monitoring new multicast in the head node In the case that channel is added, Xiang Suoshu multicast source sends the notice message for carrying the first MTU value.
In an optional implementation, the head node monitors that new multicast channel addition includes: the cephalomere Point receives the C multicast message that leaf node is sent, and the C multicast message carries the destination address of multicast channel, and the head node The multicast data message of the multicast channel of the destination address characterization is not received.
In an optional implementation, the head node monitors that new multicast channel addition includes: the cephalomere Point receives the Multicast Group Registration message of leaf node transmission, wherein the head node is meeting point.
In an optional implementation, the head node monitors that new multicast channel addition includes: the cephalomere Point receives the multicast information that the multicast source is sent；Wherein, the head node configures Multicast Source Discovery Protocol.
In an optional implementation, first transmission unit carries first for periodically sending to multicast source The notice message of MTU value.
In an optional implementation, first transmission unit is used to monitor described first in the head node In the case that MTU value changes, the notice message for carrying the first MTU value is sent to multicast source.
7th aspect, the embodiment of the present application provide a kind of head node, are applied to multicast network, and the multicast network includes Multicast source and multiple nodes, the multicast source sends multicast data message to each terminal by the multiple node, described more A node includes head node and leaf node, and the head node is the routing forwarding equipment close to the multicast source, the leaf node For close to the routing forwarding equipment of the terminal, the head node includes: the second transmission unit, for being sent to the multicast source The second notice message of the second maximum transmission unit MTU value is carried, so that the multicast source is before sending multicast data message, The third MTU value that the second MTU value and third notice message carried according to second notice message carries determines fragment MTU Value, the third notice message are the notice message that the leaf node is sent to the multicast source, and the third notice message is taken With the third MTU value；Wherein, the second MTU value that second notice message carries is according to multicast source process The MTU value that the MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node determines, described the The third MTU value that three notice messages carry is the MTU value of the outgoing interface of the leaf node；Second receiving unit, for receiving Multicast source is stated according to the multicast data message of the fragment MTU value fragment.
In an optional implementation, second MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal in addition to leaf node.
In an optional implementation, second MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal in addition to leaf node.
Eighth aspect, the embodiment of the present application provide a kind of leaf node, are applied to multicast network, and the multicast network includes Multicast source and multiple nodes, the multicast source sends multicast data message to each terminal by the multiple node, described more A node includes head node and leaf node, and the head node is the routing forwarding equipment close to the multicast source, the leaf node For close to the routing forwarding equipment of the terminal, the leaf node includes: third transmission unit, for being sent to the multicast source The third notice message of third maximum transmission unit MTU value is carried, so that the multicast source is before sending multicast data message, The third MTU value that the second MTU value carried according to the second notice message and the third notice message carry determines fragment MTU Value, second notice message are the notice message that the head node is sent to the multicast source, and second notice message is taken With second MTU value；Wherein, the second MTU value that second notice message carries is according to multicast source process The MTU value that the MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node determines；Described The third MTU value that three notice messages carry is the MTU value of the outgoing interface of the leaf node；Third receiving unit, for receiving Multicast source is stated according to the multicast data message of the fragment MTU value fragment.
In an optional implementation, second MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal in addition to leaf node.
In an optional implementation, second MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal in addition to leaf node.
In an optional implementation, the third transmission unit is used to monitor what new multicast channel was added In the case of, Xiang Suoshu multicast source sends the third notice message for carrying third MTU value.
It is described to monitor that new multicast channel addition includes: that the leaf node receives in an optional implementation Request is added in the multicast channel that terminal is sent, and the destination address that request carries multicast channel is added in the multicast channel, and described Leaf node does not receive the multicast data message of the multicast channel of the destination address characterization.
In an optional implementation, the third transmission unit is for the leaf node periodically to the multicast Source sends the third notice message for carrying third MTU value.
In an optional implementation, the third transmission unit is used to monitor the leaf segment in the leaf node In the case that the MTU value of point outgoing interface changes, Xiang Suoshu multicast source sends the third notice message for carrying third MTU value.
9th aspect, the embodiment of the present application provide a kind of multicast source, are applied to multicast network, and the multicast network includes Multicast source and multiple nodes, the multicast source sends multicast data message to each terminal by the multiple node, described more A node includes head node, and the head node is the routing forwarding equipment close to the multicast source, and the multicast source includes: the 4th Receiving unit, for before sending multicast data message, receiving the notice report for the first MTU value of carrying that the head node is sent Text；Wherein, the first MTU value that the notice message carries is that the multicast source passes through between the head node and each terminal Each node outgoing interface MTU value determine MTU value；First sharding unit, for what is carried according to the notice message First MTU value carries out fragment to multicast data message；4th transmission unit, for by the multicast data message after fragment to described Head node is sent.
In an optional implementation, first MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal；The multicast source further include: obtaining unit, for according to described group It broadcasts source and obtains connecing out for each node by the MTU value of the outgoing interface of each node between the head node and each terminal Minimum value in the MTU value of mouth；First sharding unit, in the MTU value according to the outgoing interface of each node Minimum value carries out fragment to the multicast data message.
In an optional implementation, first MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal；First sharding unit, for according to described each Minimum value in the MTU value of the outgoing interface of a node carries out fragment to the multicast data message.
Tenth aspect, the embodiment of the present application provide a kind of multicast source, are applied to multicast network, and the multicast network includes Multicast source and multiple nodes, the multicast source sends multicast data message to each terminal by the multiple node, described more A node includes head node and leaf node, and the head node is the routing forwarding equipment close to the multicast source, the leaf node For close to the routing forwarding equipment of the terminal, the multicast source includes: the 5th receiving unit, for receiving the head node hair Second notice message of carrying the second maximum transmission unit MTU value sent；Wherein, the second of the second notice message carrying MTU value is going out by each node between the head node and each terminal in addition to leaf node according to the multicast source The MTU value that the MTU value of interface determines；6th receiving unit, for receiving the of carrying third MTU value that the leaf node is sent Three notice messages；Wherein, the third MTU value that the third notice message carries is the MTU value of the outgoing interface of the leaf node；Really Order member, for determining fragment MTU value according to second MTU value and the third MTU value；Second sharding unit is used for root Fragment is carried out to multicast data message according to the fragment MTU value；5th transmission unit, for by the multicast packet after the fragment Message is sent to the head node.
In an optional implementation, second MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal in addition to leaf node；The fragment MTU value is multicast source process The MTU value of the outgoing interface of each node between the head node and each terminal in addition to leaf node and the leaf node Minimum value in the MTU value of outgoing interface.
In an optional implementation, second MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal in addition to leaf node；The fragment MTU value is described Minimum value in second MTU value and third MTU value.
Tenth on the one hand, and the embodiment of the present application provides a kind of head node, comprising: processor, memory and transceiver, In: the processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes the application and implements The data transmission method that any one implementation of example first aspect or first aspect provides.
12nd aspect, the embodiment of the present application provide a kind of head node, comprising: processor, memory and transceiver, In: the processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes the application and implements The data transmission method that any one implementation of example second aspect or second aspect provides.
13rd aspect, the embodiment of the present application provide a kind of leaf node, comprising: processor, memory and transceiver, In: the processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes the application and implements The data transmission method that any one implementation of the example third aspect or the third aspect provides.
Fourteenth aspect, the embodiment of the present application provide a kind of multicast source, comprising: processor, memory and transceiver, In:
The processor, the memory and the transceiver are connected with each other, and the memory is for storing computer journey Sequence, the computer program include program instruction, and the processor is configured for calling described program instruction, execute the application The data transmission method that any one implementation of embodiment fourth aspect or fourth aspect provides.
15th aspect, the embodiment of the present application provide a kind of multicast source, comprising: processor, memory and transceiver, In:
The processor, the memory and the transceiver are connected with each other, and the memory is for storing computer journey Sequence, the computer program include program instruction, and the processor is configured for calling described program instruction, execute the application The data transmission method that any one implementation of the 5th aspect of embodiment or the 5th aspect provides.
16th aspect, the embodiment of the present application provide a kind of data transmission method, are applied to multicast network, the multicast Network includes multicast source and multiple nodes, and the multicast source sends multicast datagram to each terminal by the multiple node Text, the multiple node include head node, and the head node is the routing forwarding equipment close to the multicast source, the method packet It includes:
The head node sends the notice message for carrying the first MTU value to the multicast source, so that the multicast source is being sent out Before sending multicast data message, fragment is carried out to the multicast data message according to first MTU value；Wherein, the notice The first MTU value that message carries is according to the multicast source by each node between the head node and each terminal The MTU value that the MTU value of outgoing interface determines；The first MTU value that the multicast source is carried according to notice message is to multicast data message Carry out fragment；Multicast data message after fragment is sent to the head node by the multicast source.
In an optional implementation, first MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal；It is described according to first MTU value to the multicast data message into Row fragment includes: the outgoing interface according to the multicast source by each node between the head node and each terminal MTU value obtains the minimum value in the MTU value of the outgoing interface of each node；According in the MTU value of the outgoing interface of each node Minimum value to the data message carry out fragment.
In an optional implementation, first MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal；It is described according to first MTU value to the multicast It includes: minimum value in MTU value according to the outgoing interface of each node to the data message that data message, which carries out fragment, Carry out fragment.
17th aspect, the embodiment of the present application provide a kind of data transmission method, are applied to multicast network, the multicast Network includes multicast source and multiple nodes, and the multicast source sends multicast datagram to each terminal by the multiple node Text, the multiple node include head node and leaf node, and the head node is the routing forwarding equipment close to the multicast source, institute Stating leaf node is the routing forwarding equipment close to the terminal, which comprises the head node is sent to the multicast source Carry the second notice message of the second maximum transmission unit MTU value；Wherein, the second MTU value that second notice message carries It is the outgoing interface according to the multicast source by each node between the head node and each terminal in addition to leaf node MTU value determine MTU value；The leaf node sends the third for carrying third maximum transmission unit MTU value to the multicast source Notice message；Wherein, the third MTU value that the third notice message carries is the MTU value of the outgoing interface of the leaf node；It is described Multicast source determines fragment MTU value according to second MTU value and the third MTU value；The multicast source is according to the fragment MTU Value carries out fragment to multicast data message；The multicast source sends the multicast data message after fragment to the head node.
In an optional implementation, second MTU value be the multicast source by the head node with it is described The MTU value of the outgoing interface of each node between each terminal in addition to leaf node；The fragment MTU value is multicast source process The MTU value of the outgoing interface of each node between the head node and each terminal in addition to leaf node and the leaf node Minimum value in outgoing interface MTU value.
In an optional implementation, second MTU value be the multicast source by the head node with it is described Minimum value in the MTU value of the outgoing interface of each node between each terminal in addition to leaf node；The fragment MTU value is described Minimum value in second MTU value and third MTU value.
18th aspect, the embodiment of the present application provide a kind of data transmission system, comprising: head node, multicast source and end End, in which: the multicast source and the head node communicate to connect, and the multicast source is used for through the head node to the terminal Send multicast data message；Wherein, the head node is any one reality of the 6th aspect of the embodiment of the present application or the 6th aspect The head node that existing mode provides, the multicast source are any one realization side of the 9th aspect of the embodiment of the present application or the 9th aspect The multicast source that formula provides.
19th aspect, the embodiment of the present application provide a kind of data transmission system, comprising: head node, leaf node, multicast Source and terminal, in which: the multicast source and the head node communicate to connect, and the leaf node and the terminal communicate to connect, institute Multicast source is stated for sending multicast data message to the terminal by the head node and the leaf node；Wherein, the head The head node that any one implementation in terms of node is the embodiment of the present application the 7th or in terms of the 7th provides, the leaf node For the leaf node that any one implementation of the embodiment of the present application eighth aspect or eighth aspect provides, the multicast source is this Apply for the multicast source that any one implementation of the tenth aspect of embodiment or the tenth aspect provides.
20th aspect, the embodiment of the present application provide a kind of computer readable storage medium, which is characterized in that the meter Calculation machine readable storage medium storing program for executing is stored with computer program, and the computer program includes program instruction, and quilt is worked as in described program instruction When processor executes, the processor is made to execute any one implementation of the embodiment of the present application first aspect or first aspect The data transmission method of offer.
20th on the one hand, and the embodiment of the present application provides a kind of computer readable storage medium, which is characterized in that described Computer-readable recording medium storage has computer program, and the computer program includes program instruction, and described program instruction is worked as When being executed by processor, the processor is made to execute any one realization side of the embodiment of the present application second aspect or second aspect The data transmission method that formula provides.
22nd aspect, the embodiment of the present application provide a kind of computer readable storage medium, which is characterized in that described Computer-readable recording medium storage has computer program, and the computer program includes program instruction, and described program instruction is worked as When being executed by processor, the processor is made to execute any one realization side of the embodiment of the present application third aspect or the third aspect The data transmission method that formula provides.
23rd aspect, the embodiment of the present application provide a kind of computer readable storage medium, which is characterized in that described Computer-readable recording medium storage has computer program, and the computer program includes program instruction, and described program instruction is worked as When being executed by processor, the processor is made to execute any one realization side of the embodiment of the present application fourth aspect or fourth aspect The data transmission method that formula provides.
Twenty-fourth aspect, the embodiment of the present application provide a kind of computer readable storage medium, which is characterized in that described Computer-readable recording medium storage has computer program, and the computer program includes program instruction, and described program instruction is worked as When being executed by processor, the processor is made to execute any one realization side of the 5th aspect of the embodiment of the present application or the 5th aspect The data transmission method that formula provides.
It can make multicast source before sending multicast data message as can be seen that implementing the embodiment of the present application, according to cephalomere The MTU value that point is sent carries out fragment to multicast data message, so that can be with according to the multicast data message after above-mentioned MTU value fragment It is successfully transmitted to terminal by any one node in transmission path, shortens the drainage time delay in playing process, improves card The phenomenon that screen, promotes user experience.It is carried in addition, being sent the embodiment of the present application also provides a variety of triggering head nodes to multicast source The condition of the notice message of MTU value takes into account a variety of factors that may lead card lifting screen, guarantees the process watched in user In, no matter what's going on can make drainage time delay short, and broadcasting pictures are smooth, and user is made to obtain optimal viewing experience.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, below by embodiment it is required use it is attached Figure is briefly described.
Fig. 1 is data transmission system structural schematic diagram provided by the embodiments of the present application；
Fig. 2 is data transmission method flow diagram provided by the embodiments of the present application；
Fig. 3 is a kind of concrete scene schematic diagram provided by the embodiments of the present application；
Fig. 4 is the data transmission method flow diagram that another embodiment of the application provides；
Fig. 5 is the structural schematic diagram of head node provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram for the head node that another embodiment of the application provides；
Fig. 7 is the structural schematic diagram for the leaf node that another embodiment of the application provides；
Fig. 8 is the structural schematic diagram of multicast source provided by the embodiments of the present application；
Fig. 9 is the structural schematic diagram for the multicast source that another embodiment of the application provides；
Figure 10 is the structural schematic diagram of another head node provided by the embodiments of the present application；
Figure 11 is the structural schematic diagram of another head node provided by the embodiments of the present application；
Figure 12 is the structural schematic diagram of another leaf node provided by the embodiments of the present application；
Figure 13 is the structural schematic diagram of another multicast source provided by the embodiments of the present application；
Figure 14 is the structural schematic diagram of another multicast source provided by the embodiments of the present application.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description.
The description and claims of this application and term " first " in above-mentioned attached drawing, " second ", " third " etc. are For distinguishing different objects, it is not use to describe a particular order.In addition, term " includes " and " having " and their any changes Shape, it is intended that cover and non-exclusive include.Such as contain the process, method of a series of steps or units, system, product or Equipment is not limited to listed step or unit, but optionally further comprising the step of not listing or unit or optional Ground further includes other step or units intrinsic for these process, methods, product or equipment.
Fig. 1 is combined to introduce this data transmission system provided by the embodiments of the present application first.As shown in Figure 1, data transmission system System may include multicast source, head node, P node, leaf node, terminal etc..Wherein, head node is that network edge is connect with multicast source The network equipment (Provider Edge, PE) node, leaf node is the PE node that connect with terminal of network edge, and P node is net The network equipment (Provider, P) node in network.
Wherein, multicast source is used to send multicast datagram at least one terminal by head node, P node and leaf node Text；Head node, P node and leaf node are used to the multicast data message that forwarding multicasting source is sent to terminal, wherein head node is Close to the routing forwarding equipment of multicast source, leaf node is the routing forwarding equipment close to terminal, and P node is positioned at head node and leaf Routing forwarding equipment among node.Head node, P node and leaf node may be collectively referred to as intermediate node, transmit in a data P node can be not present in system, in a data transmission system, if when only one intermediate node, which can With referred to as head node or leaf node.It is appreciated that leaf node can connect at least one terminal.Wherein, multicast source can With but be not limited to server etc.；Routing forwarding equipment can be, but not limited to be router, gateway etc.；Terminal can with but not It is limited to be the set-top box etc. being connected with TV.
When the target channel that terminal receives user's input watches instruction, terminal believes the address for carrying the target channel The data message of the address information of breath and the terminal is sent to leaf node, and leaf node is it is judged whether or not the target channel is corresponding Data traffic show there is user to watch that the channel, leaf node receive the Internet group pipe for the first time on the leaf node if not having It manages agreement (Internet Group Management Protocol, IGMP) to be added, is converted into Protocol Independent Multicast (Protocol Independent Multicast, PIM) or C multicast message (Custom-multicast) upstream device hair It send, the corresponding flow of the channel is drawn to get off.Wherein, C multicast message is used to receive the multicast frequency of terminal transmission in leaf node When request is added in road, upstream device sends the information for carrying the multicast channel destination address.It is appreciated that upstream equipment It refers to the equipment between the node and multicast source, may include multicast source.Such as the upstream equipment of Fig. 1 leaf node can be P node, head node and multicast source, the upstream equipment of P node can be head node and multicast source.
Next the data transmission system for combining Fig. 1 introduction, introduces data transmission method provided by the embodiments of the present application.Such as Shown in Fig. 2, data transmission method at least may include following steps:
S201: head node sends the notice message for carrying the first MTU value to multicast source.
Specifically, which can be the excessive message of data packet as defined in IPv6 (Packet Too Big Message), which can carry the address information of multicast channel, and multicast source can be determined according to the address information should The multicast channel of address information characterization, and then fragment is carried out to the corresponding multicast data message of the multicast channel.
Specifically, head node in multicast source according to the MTU value of the outgoing interface of itself or other MTU values saved to group Before multicast data message carries out fragment, the notice message for carrying the first MTU value is sent to multicast source, the first MTU value herein is New MTU value, MTU value different from the original outgoing interface of multicast source or other MTU values saved, to prevent according to multicast source The MTU value of its own outgoing interface or other MTU values saved are greater than to there is message length after multicast data message fragment After the maximum transmission unit of the outgoing interface of some intermediate node, then the excessive message of data packet for carrying MTU value is sent to multicast source, Lead to the phenomenon that drainage time delay is too long, and appearance card shields in playing process occur.
Specifically, the first MTU value that notice message carries is passed through between the head node and each terminal according to multicast source The MTU value that the MTU value of each node outgoing interface determines.
It is understood that multicast source can be connected with multiple head nodes in a data transmission system.Such as Fig. 1 institute Show, multicast source is connect with head node 1 and head node 2.And the first MTU that the notice message that head node 1 is sent to multicast source carries Value is the MTU value determining by the MTU value of the outgoing interface of each node between head node 1 and each terminal according to multicast source.Fig. 1 In the data transmission system shown, multicast source is connect by head node 1 with terminal 1, terminal 2, terminal 3, terminal 4, multicast source warp The each node crossed between head node 1 and each terminal includes: head node 1, P node 1, P node 2, leaf node 1, leaf node 2 and leaf Node 3.In entire data transmission system, from multicast source to a certain terminal, all nodes that centre is passed through constitute a biography Defeated path.Example is as shown in figure 1, it is assumed that multicast source to the transmission path between terminal 1 is path 1, then path 1 contains head node 1, P node 1 and leaf node 1.And for entire data transmission system, there are multiple terminals to connect with multicast source, therefore group Broadcast between source and all terminals that there are a plurality of transmission paths.
For head node specific for one or P node, it can be connected by multiple outgoing interfaces of the node multiple tight Adjacent downstream node.It is understood that downstream node is the node between the node and terminal.So when with entire data When for Transmission system, the MTU value of the outgoing interface of the node refers to the outgoing interface being connected with above-mentioned multiple adjacent downstream nodes MTU value.When for single transmission path, the MTU value of the outgoing interface of the node refer to it is adjacent in the transmission path The MTU value of the connected outgoing interface of downstream node.
By taking head node 1 as an example, head node 1 is connected by outgoing interface A1 with adjacent downstream node P node 1, and head node 1 is logical Outgoing interface A2 is crossed to be connected with adjacent downstream node P node 2.When for entire data transmission system, head node 1 goes out to connect The MTU value of mouth refers to the MTU value of outgoing interface A1 and the MTU value of outgoing interface A2.When for single transmission path, such as path 1, the MTU value of the outgoing interface of head node 1 is the MTU value of outgoing interface A1.
For leaf node specific for one, multiple terminals can be connected by multiple outgoing interfaces of the leaf node.When When with for entire data transmission system, the MTU value of the outgoing interface of the leaf node refers to that is be connected with above-mentioned multiple terminals goes out to connect The MTU value of mouth.When for single transmission path, the MTU value of the outgoing interface of the leaf node, which refers to, to be connected in the transmission path Terminal outgoing interface MTU value.
By taking leaf node 1 as an example, leaf node 1 is connect by outgoing interface C1 with terminal 1, and leaf node 1 passes through outgoing interface C2 and end 2 connection of end.When for entire data transmission system, the MTU value of the outgoing interface of leaf node 1 refers to the MTU of outgoing interface C1 The MTU value of value and outgoing interface C2.When for single transmission path, refer to such as path 1, the MTU value of the outgoing interface of leaf node 1 It is the MTU value of outgoing interface C1.
It should be noted that the MTU value of the outgoing interface for certain node mentioned in subsequent all embodiments can refer to Upper description.
Optionally, above-mentioned first MTU value can be above-mentioned multicast source by each section between the head node and each terminal The MTU value of outgoing interface of point itself.I.e. first MTU value be multiple values set.Multicast source is receiving above-mentioned first MTU value After (set of multiple values), minimum value is determined from this collection, and multicast data message is divided further according to the minimum value Piece simultaneously sends and supreme states head node.
Optionally, above-mentioned first MTU value can be above-mentioned multicast source by each section between the head node and each terminal Minimum value in the MTU value of the outgoing interface of point, i.e., determined the minimum value for being ultimately sent to multicast source, multicast source is connecing by head node After receiving above-mentioned minimum value, fragment is directly carried out to multicast data message according to the minimum value.
Specifically, multicast source is by the minimum in the MTU value of each node outgoing interface between the head node and each terminal Value is the road that multicast source passes through the smallest transmission path of path MTU value in each transmission paths between the head node and each terminal Diameter MTU value.It is appreciated that path MTU value be certain transmission paths allow by maximum data packet size, i.e., from group Broadcast the minimum value in the MTU value for the interface that all nodes go out on source to certain transmission paths between a certain terminal.
Optionally, above-mentioned first MTU value can also be multicast source by each transmission road between the head node and each terminal The path MTU value of diameter.
As shown in figure 3, multicast source passes through between head node and all terminals (terminal 1 and terminal 2) being connected, there are two Transmission path, it is assumed that multicast source by between head node and terminal 1 transmission path be path 1, multicast source by head node with Transmission path between terminal 2 is path 2.
For path 1, all nodes in the transmission path include head node, P node 1 and leaf node 1, head node It is connected by outgoing interface B1 with P node 1, P node 1 is connected by outgoing interface C1 with leaf node 1, and leaf node 1 passes through outgoing interface D1 It is connected with terminal 1.Therefore, the MTU value of the outgoing interface of all nodes (from head node to leaf node 1) is followed successively by the path 1 1350,1200,1400, then the path MTU value in path 1 be the transmission path on all nodes outgoing interface MTU value in most Small value, as 1200.
For path 2, all nodes in the transmission path include head node, P node 2 and leaf node 2, head node It is connected by outgoing interface B2 with P node 2, P node 2 is connected by outgoing interface C2 with leaf node 2, and leaf node 2 passes through outgoing interface D2 It is connected with terminal 2.Therefore, the MTU value of the outgoing interface of all nodes (from head node to leaf node 2) is followed successively by the path 2 1300,1450,1250, then the path MTU value in path 2 be the transmission path on all nodes outgoing interface MTU value in most Small value, as 1250.
If most above-mentioned first MTU value is outgoing interface of the above-mentioned multicast source by each node between the head node and each terminal MTU value itself, then above-mentioned first MTU value be are as follows: 1350,1200,1400,1300,1450,1250.
If above-mentioned first MTU value is outgoing interface of the above-mentioned multicast source by each node between the head node and each terminal MTU value in minimum value, as multicast source passes through between the head node and each terminal that path MTU value is most in each transmission paths The path MTU value of small transmission path, then above-mentioned first MTU value is 1200.
If above-mentioned first MTU value is road of the above-mentioned multicast source by each transmission path between the head node and each terminal Diameter MTU value, then above-mentioned first MTU value be are as follows: 1200,1250.
Specifically, head node can send to multicast source under any case of following three kinds of situations and carry the first MTU value Notice message.
Situation one: it in the case where above-mentioned head node monitors that new multicast channel is added, is sent to multicast source and carries the The notice message of one MTU value.
Specifically, the mode that head node monitors that new multicast channel is added at least has following three kinds:
Mode one: it can be leaf node to head node and send C multicast message, C multicast message carries the multicast being newly added The address information of channel, when head node receives the C multicast message of the address information of the carrying multicast channel of leaf node transmission, Whether first judge head node currently has the corresponding multicast data message of the multicast channel.If head node is currently without the multicast channel Corresponding multicast data message then shows that the multicast channel is the multicast channel being newly added.If head node currently has multicast frequency The corresponding multicast data message in road then shows that existing other users are watching the multicast channel, which is not new add The multicast channel entered.In addition, the C multicast message that leaf node is sent can also include the address information of the leaf node, so that subsequent Multicast source sends the multicast channel data message after fragment according to the address information of the leaf node.
Mode two: head node can also serve as meeting point (Rendezvous Point, RP), when there is new multicast channel to be added When, head node can receive the Multicast Group Registration message of leaf node transmission.
Specifically, leaf node send C multicast message may include multicast channel address information so that multicast source according to The multicast data message for the multicast channel that the multicast channel address information characterizes the multicast channel address information carries out fragment.
Specifically, the C multicast message that leaf node is sent can also include the address information of the leaf node, so that subsequent multicast Source sends the multicast channel data message after fragment according to the address information of the leaf node.
As can be seen that message involved in mode one and mode two is issued by leaf node, difference is message format not Together.
Mode three: head node can configure Multicast Listener Discovery (Multicast Listener Discovery, MLD), when increasing new multicast channel on multicast source, head node can receive the multicast information of multicast source transmission.
As can be seen that different from mode one and mode two, three kinds of messages being related to of mode are issued by multicast source.
Situation two: above-mentioned head node periodically sends the notice message for carrying the first MTU value to multicast source.
Specifically, head node can be set and periodically send the first MTU of carrying to multicast source according to certain time interval The notice message of value, above-mentioned time interval can be, but not limited to be 1 hour, 30 minutes, 2 hours etc..It specifically can be set one Timer, after timer timing, triggering head node sends the notice message for carrying the first MTU value to multicast source.It is this Situation is that multicast source loses the first MTU value of known multicast group and causes the multicast data message after fragment can not be suitable in order to prevent Benefit is sent to terminal, and user is caused to occur the phenomenon that card screen in watching process.
Situation three: in the case where above-mentioned head node monitors that above-mentioned first MTU value changes, above-mentioned head node is to group It broadcasts source and sends the notice message for carrying the first MTU value.
Specifically, if the first MTU value changes, head node is triggered to multicast source and sends the logical of the first MTU value of carrying Know message, so that the first MTU value of the known multicast group of multicast source more new record, and according to updated first MTU value to group Multicast data message carries out fragment, and after guaranteeing that the first MTU value changes, multicast data message still can smoothly be sent to end Drainage time delay is shortened at end, improves card screen phenomenon, promotes user experience.
S202: multicast source carries out fragment to multicast data message according to the first MTU value.
Optionally, when the first MTU value in S201 is that above-mentioned multicast source passes through each section between the head node and each terminal When the MTU value of outgoing interface of point itself, multicast source determines minimum value from above-mentioned first MTU value (set of multiple values), then Fragment is carried out to multicast data message according to the minimum value.
Optionally, when the first MTU value in S201 is that above-mentioned multicast source passes through each section between the head node and each terminal When putting the minimum value in the MTU value of outgoing interface, i.e., the minimum value for being ultimately sent to multicast source is determined by head node, multicast source is connecing After receiving above-mentioned minimum value, fragment is directly carried out to multicast data message according to the minimum value.
Optionally, when the first MTU value in S201 is above-mentioned multicast source by each biography between the head node and each terminal When the path MTU value in defeated path, multicast source determines minimum value from the path MTU value of above-mentioned each transmission path, most further according to this Small value carries out fragment to multicast data message.
S203: the multicast data message after fragment is sent to head node by multicast source.
Specifically, after according to above-mentioned first MTU value to multicast data message fragment, multicast source is by the multicast after above-mentioned fragment Data message is sent to above-mentioned head node.
Implement the embodiment of the present application, for multicast source before sending multicast data message, head node sends basis to multicast source MTU value of the multicast source by the MTU value determination of the outgoing interface of each node between the head node and each terminal, multicast source is according to this First MTU value carries out fragment to multicast data message, so that the multicast data message after fragment can pass through transmission path On any one node-node transmission to terminal, the phenomenon that shortening the drainage time delay in playing process, improve card screen, promote user's body It tests.
It is appreciated that at the beginning of the foundation of multicast network, head node is you can learn that head in a kind of possible situation The MTU value of the outgoing interface of all nodes (in addition to leaf node) between node and all leaf nodes being connected, thus head node to When multicast source sends the notice message for carrying MTU value, it can directly transmit between the head node and all leaf nodes that it has been known The MTU value of (in addition to leaf node) total interface, or directly transmit (disleaf between the head node and all leaf nodes that it has been known Outside node) all nodes outgoing interface MTU value in the smallest MTU value.
Therefore, the embodiment of the present application provides another data transmission method, as shown in figure 4, data transmission method is extremely Less may include following steps:
S401: head node sends the second notice message for carrying the second MTU value to multicast source.
Specifically, the second MTU value that the second notice message carries is according to above-mentioned multicast source by the head node and each end The MTU value that the MTU value of the outgoing interface of each node between end in addition to leaf node determines.
Optionally, above-mentioned second MTU value is that above-mentioned multicast source passes through between the head node and each terminal in addition to leaf node Each node the MTU value of outgoing interface itself.I.e. second MTU value be multiple values set.
Optionally, above-mentioned second MTU value is that above-mentioned multicast source passes through between the head node and each terminal in addition to leaf node Each node outgoing interface MTU value in minimum value.
The trigger condition for carrying the second notice message of the second MTU value is sent to multicast source for head node, can refer to Head node sends three kinds of situations for carrying the notice message of the first MTU value to multicast source in S201, and details are not described herein.
S402: leaf node sends the third notice message for carrying third MTU value to multicast source.
Specifically, the third MTU value that third notice message carries is the MTU value of the outgoing interface of the leaf node.
Specifically, leaf node can send to multicast source under any case of following three kinds of situations and carry third MTU value Third notice message.
Situation one: when monitoring that new multicast channel is added, triggering leaf node sends to multicast source and carries third MTU value Third notice message.
Specifically, monitoring that new multicast channel is added can be the multicast channel addition that leaf node receives terminal transmission Request, the destination address which is added request carrying multicast channel first judge leaf when leaf node receives the request Whether node currently has the corresponding multicast data message of the multicast channel.If leaf node does not receive destination address characterization currently The corresponding multicast data message of multicast channel, then show that the multicast channel is the multicast channel being newly added.If leaf node is current The corresponding multicast data message of the multicast channel is received, then shows that existing other users are watching the multicast channel, the group Broadcasting channel not is the multicast channel being newly added.It is appreciated that in this case, the MTU value of the outgoing interface of leaf node is To receive the MTU value that the interface of request is added in multicast channel.As can be seen that the MTU value of the outgoing interface of leaf node is needle herein For the specific transmission path of a certain item, which is multicast source by above-mentioned head node and above-mentioned transmission multicast The transmission path between the terminal of request is added in channel.It is appreciated that even if multicast source by above-mentioned head node with it is above-mentioned It sends multicast channel to be added between the terminal of request there are a plurality of transmission path, one sends the terminal that request is added in multicast channel An only corresponding leaf node.
Situation two: above-mentioned leaf node periodically sends the third notice message for carrying third MTU value to multicast source.
Specifically, leaf node can be set and periodically send carrying MTU value to multicast source according to certain time interval Notice message, above-mentioned time interval can be, but not limited to be 1 hour, 30 minutes, 2 hours etc..A timing specifically can be set Device, after timer timing, triggering leaf node sends the notice message for carrying MTU value to multicast source.Such case be for It prevents multicast source from losing the MTU value of the outgoing interface of known multicast group and causes the multicast data message after fragment can not be successfully and send Up to terminal, user is caused to occur the phenomenon that card screen in watching process.It is appreciated that in this case, leaf segment, which is pointed out, to be connect The MTU value of mouth is the MTU value of the corresponding outgoing interface of known multicast group.Known multicast group can be regarded as being connected with the leaf node The multicast channel watched of some terminal.The terminal being connected with the leaf node can have multiple, this multiple terminal can be received See different multicast channels, therefore known multicast group can have multiple, leaf node can be periodically respectively to above-mentioned multiple groups Broadcast the MTU value that the corresponding multicast source of group sends its corresponding outgoing interface.As can be seen that leaf node is sent to multicast source every time herein Leaf node outgoing interface MTU value both for the specific transmission path of a certain item for.
Situation three: in the case where above-mentioned leaf node monitors that the MTU value of above-mentioned outgoing interface changes, above-mentioned leaf node The third notice message for carrying third MTU value is sent to multicast source.
Specifically, if the MTU value of leaf node outgoing interface changes, leaf node is triggered to multicast source and sends carrying third The third notice message of MTU value, so that the MTU value of the outgoing interface of the known multicast group of multicast source more new record, and according to update The MTU value of outgoing interface afterwards carries out fragment, after guaranteeing that the MTU value of outgoing interface changes, multicast packet to multicast data message Message still can smoothly be sent to terminal, shorten drainage time delay, improve card screen phenomenon, promote user experience.It is known that It is that in this case, the MTU value of the outgoing interface of leaf node is the MTU value of the corresponding outgoing interface of known multicast group.Known group The multicast channel that some terminal that broadcasting group can be regarded as being connected with the leaf node is being watched.The terminal being connected with the leaf node Can have multiple, this multiple terminal can watch different multicast channels, therefore known multicast group can have it is multiple, when wherein one When the MTU value of the corresponding outgoing interface of a or multiple multicast groups changes, leaf node can be to the corresponding multicast of the multicast group Source sends the MTU value of its corresponding outgoing interface.As can be seen that the outgoing interface for the leaf node that leaf node is sent to multicast source herein MTU value is for a certain transmission paths where the changed outgoing interface of MTU value.
Specifically, the MTU value of outgoing interface can be sent to multicast source by head node by leaf node, and leaf node can also be straight It connects and the MTU value of outgoing interface is sent to multicast source.
It is appreciated that the sequencing that S401 and S402 occurs is it is not limited here.
S403: multicast source determines fragment MTU value according to the second MTU value and third MTU value.
Optionally, when the first MTU value in S401 is that above-mentioned multicast source passes through between the head node and each terminal except leaf segment When the MTU value of outgoing interface of each node except point itself, above-mentioned fragment MTU value is that above-mentioned multicast source passes through above-mentioned head node In the MTU value of the outgoing interface of the MTU value and above-mentioned leaf node of each node outgoing interface between each terminal in addition to leaf node Minimum value.
Optionally, when the first MTU value in S401 is that above-mentioned multicast source passes through between the head node and each terminal except leaf segment Point except each node outgoing interface MTU value in minimum value when, above-mentioned fragment MTU value be above-mentioned first MTU value with it is upper State the minimum value in the MTU value of the outgoing interface of leaf node.
S404: multicast source carries out fragment to multicast data message according to fragment MTU value.
S405: multicast source sends the multicast data message after fragment to head node.
Specifically, the multicast data message after above-mentioned fragment is sent to above-mentioned head node by multicast source.It is appreciated that After multicast data message after fragment is sent to above-mentioned head node by multicast source, above-mentioned head node can will be above-mentioned by P node Multicast data message after fragment is sent to above-mentioned leaf node.
The embodiment of the present application is sent the notice message for carrying MTU value, cephalomere from head node and leaf node to multicast source respectively The third MTU value that the third notice message that the second MTU value and leaf node that the second notice message that point is sent carries are sent carries Multicast source is covered by the MTU value of the outgoing interface of all nodes between the head node and each terminal, it is ensured that after fragment Multicast data message can pass through any one node-node transmission in transmission path to terminal, shorten drawing in playing process Time delay is flowed, improves card screen phenomenon, promotes user experience.
The embodiment of the present application also provides a kind of head nodes, as shown in figure 5, head node 50 at least may include: the first hair Send unit 510, the first receiving unit 520, in which:
First transmission unit 510, for sending the notice message for carrying the first MTU value to multicast source, so that multicast source exists Before sending multicast data message, fragment is carried out to multicast data message according to the first MTU value；Wherein, notice message carries First MTU value is the MTU that multicast source is determined by the MTU value of the outgoing interface of each node between head node 50 and each terminal The description for please referring to S201 is described in detail in value.
Optionally, above-mentioned first MTU value is that multicast source goes out to connect by each node between head node 50 and each terminal The MTU value of mouth.
Optionally, above-mentioned first MTU value is that multicast source goes out to connect by each node between head node 50 and each terminal Minimum value in the MTU value of mouth.
Optionally, the first transmission unit 510 is used in the case where head node 50 monitors that new multicast channel is added, to Multicast source sends the notice message for carrying the first MTU value.Detailed description please refers to head node in S201 and carries to multicast source transmission The description as described in situation one in three kinds of situations of the notice message of the first MTU value.
Optionally, it includes: that head node 50 receives the C group that leaf node is sent that head node 50, which monitors that new multicast channel is added, Casting text, C multicast message carries the destination address of multicast channel, and head node 50 does not receive the group of above-mentioned purpose address characterization Broadcast the multicast data message of channel.It is described in detail and please refers to the notice report that head node in S201 sends carrying MTU value to multicast source Head node monitors the description as described in mode one in three kinds of modes that new multicast channel is added in the situation one of text.
Optionally, head node 50 monitors that new multicast channel addition includes: that head node 50 receives what leaf node was sent Multicast Group Registration message, wherein head node 50 is meeting point.Detailed description please refers to head node in S201 and takes to multicast source transmission Head node monitors in three kinds of modes that new multicast channel is added about mode two in the case where notice message with MTU value one Description.
Optionally, head node 50 monitors that new multicast channel addition includes: that head node 50 receives what multicast source was sent Multicast information；Wherein, head node 50 configures Multicast Source Discovery Protocol.Detailed description please refers to head node in S201 and sends out to multicast source Head node monitors in three kinds of modes that new multicast channel is added about mode in the case where sending the notice message for carrying MTU value one Three description.
Optionally, the first transmission unit 510 to multicast source for periodically sending the notice message for carrying the first MTU value. It is described in detail in three kinds of situations for please referring to the notice message that head node sends carrying MTU value to multicast source in S201 about situation Two description.
Optionally, the first transmission unit 510 is used in the case where head node 50 monitors that the first MTU value changes, The notice message for carrying the first MTU value is sent to multicast source.Detailed description please refers to head node in S201 and takes to multicast source transmission The description as described in situation three in three kinds of situations of the notice message with MTU value.
First receiving unit 520, for receiving multicast source according to the multicast data message of the first MTU value fragment, specifically The bright description for please referring to S203.
The embodiment of the present application provides another head node, as shown in fig. 6, head node 60 at least may include: second Transmission unit 610, the second receiving unit 620；Wherein:
Second transmission unit 610, for sending the second notice message for carrying the second MTU value to multicast source, so that multicast Source carries before sending multicast data message according to the second MTU value of the second notice message carrying and third notice message Third MTU value determines fragment MTU value, and third notice message is the notice message that leaf node is sent to multicast source, third notice report Text carries third MTU value；Wherein, the second MTU value that the second notice message carries is according to multicast source by head node 60 and each The MTU value that the MTU value of the outgoing interface of each node between terminal in addition to leaf node determines, third notice message carry the Three MTU values are the MTU values of the outgoing interface of leaf node, and the description for please referring to S401 and S402 is described in detail.
Optionally, above-mentioned second MTU value is multicast source by each in addition to leaf node between head node 60 and each terminal The MTU value of the outgoing interface of a node.
Optionally, above-mentioned second MTU value is multicast source by each in addition to leaf node between head node 60 and each terminal Minimum value in the MTU value of the outgoing interface of a node.
Second receiving unit 620, for receiving multicast source according to the multicast data message of fragment MTU value fragment, specifically The bright description for please referring to S403.
The embodiment of the present application provides a kind of leaf node, as shown in fig. 7, leaf node 70 at least may include: that third is sent Unit 710, third receiving unit 720；Wherein:
Third transmission unit 710, for sending the third notice report for carrying third maximum transmission unit MTU value to multicast source Text, so that multicast source is before sending multicast data message, the second MTU value and third notice carried according to the second notice message The third MTU value that message carries determines that fragment MTU value, the second notice message are the notice report that head node 60 is sent to multicast source Text, the second notice message carry the second MTU value；Wherein, the second MTU value that the second notice message carries is passed through according to multicast source The MTU value that the MTU value of the outgoing interface of each node between head node 60 and each terminal in addition to leaf node determines；Third notice The third MTU value that message carries is the MTU value of the outgoing interface of leaf node 70, and the description for please referring to S401 and S402 is described in detail.
Optionally, above-mentioned second MTU value is multicast source by each in addition to leaf node between head node 60 and each terminal The MTU value of the outgoing interface of a node.
Optionally, above-mentioned second MTU value is multicast source by each in addition to leaf node between head node 60 and each terminal Minimum value in the MTU value of the outgoing interface of a node.
Optionally, third transmission unit 710 is used to send out in the case where monitoring that new multicast channel is added to multicast source Send the third notice message for carrying third MTU value.Detailed description please refers to S402 leaf node and sends carrying third to multicast source The description as described in situation one in three kinds of situations of the third notice message of MTU value.
Optionally, third transmission unit 710 to multicast source for periodically sending the third notice report for carrying third MTU value Text.Three kinds of feelings for please referring to the third notice message that S402 leaf node sends carrying third MTU value to multicast source are described in detail The description as described in situation two in condition.
Optionally, third transmission unit 710 is used to monitor that the MTU value of 70 outgoing interface of leaf node becomes in leaf node 70 In the case where change, the third notice message for carrying third MTU value is sent to multicast source.Detailed description please refers to S402 leaf node The description as described in situation three in three kinds of situations for carrying the third notice message of third MTU value is sent to multicast source.
Third receiving unit 720, for receiving multicast source according to the multicast data message of fragment MTU value fragment, specifically The bright description for please referring to S404.
The embodiment of the present application also provides a kind of multicast source, as shown in figure 8, multicast source 80 at least may include: the 4th to connect Receive unit 810, the first sharding unit 820, the 4th transmission unit 830；Wherein:
4th receiving unit 810, for before sending multicast data message, receiving the carrying first that head node 50 is sent The notice message of MTU value；Wherein, the first MTU value that notice message carries be multicast source 80 by head node 50 and each terminal it Between each node outgoing interface the MTU value that determines of MTU value, be described in detail and please refer to the description of S201.
Optionally, above-mentioned first MTU value is the going out by each node between head node 50 and each terminal of multicast source 80 The MTU value of interface.
Multicast source 80 further includes obtaining unit 840, for being passed through between head node 50 and each terminal according to multicast source 80 The MTU value of the outgoing interface of each node obtains the minimum value in the MTU value of the outgoing interface of each node.
First sharding unit 820, for the minimum value in the MTU value according to the outgoing interface of each node to multicast datagram Text carries out fragment.
Optionally, above-mentioned first MTU value is the going out by each node between head node 50 and each terminal of multicast source 80 The minimum value of the MTU value of interface.
First sharding unit 820, for the minimum value in the MTU value according to the outgoing interface of each node to described group Multicast data message carries out fragment, and the description for please referring to S202 is described in detail.
4th transmission unit 830, for sending the multicast data message after fragment to head node 50, detailed description please be joined According to the description of S203.
The embodiment of the present application also provides another multicast sources, as shown in figure 9, multicast source 90 at least may include: the 5th Receiving unit 910, the 6th receiving unit 920, determination unit 930, the second sharding unit 940 and the 5th transmission unit 950；Its In:
5th receiving unit 910, second of carrying the second maximum transmission unit MTU value for receiving the transmission of head node 60 Notice message；Wherein, the second MTU value that the second notice message carries be according to multicast source 90 by head node 60 and each terminal it Between each node in addition to leaf node outgoing interface the MTU value that determines of MTU value, the description for please referring to S401 is described in detail.
6th receiving unit 920, the third notice message of the carrying third MTU value for receiving the transmission of leaf node 70；Its In, the third MTU value that third notice message carries is the MTU value of the outgoing interface of leaf node 70, and detailed description please refers to S402's Description.
Determination unit 930, for determining fragment MTU value according to the second MTU value and third MTU value, detailed description is please referred to The description of S403.
Second sharding unit 940, for carrying out fragment to multicast data message according to fragment MTU value, detailed description please be joined According to the description of S404.
5th transmission unit 950, for sending the multicast data message after the fragment to the head node 60, in detail Illustrate the description for please referring to S405.
Optionally, above-mentioned second MTU value is that multicast source 90 passes through between head node 60 and each terminal in addition to leaf node The MTU value of the outgoing interface of each node；Fragment MTU value be multicast source 90 by between head node 60 and each terminal except leaf node it Minimum value in the MTU value of the outgoing interface of the MTU value and leaf node 70 of the outgoing interface of outer each node.
Optionally, above-mentioned second MTU value is that multicast source 90 passes through between head node 60 and each terminal in addition to leaf node Minimum value in the MTU value of the outgoing interface of each node；Fragment MTU value is the minimum in above-mentioned second MTU value and third MTU value Value.
The embodiment of the present application also provides an other kind nodes, and as shown in Figure 10, head node 100 at least may include: At least one processor 1001, at least one network interface 1004, user interface 1003, memory 1005, at least one communication Bus 1002, display screen 1006.Wherein, communication bus 1002 is for realizing the connection communication between these components, it should be understood that Various components in head node 100 can also be coupled by other connectors, other described connectors may include all kinds of interfaces, Transmission line or bus etc., in each embodiment of the application, coupling refers to connecting each other by ad hoc fashion, including direct It is connected or is indirectly connected by other equipment.
Wherein, processor 1001 may include following at least one type: general central processor (Central Processing Unit, CPU), digital signal processor (Digital Signal Processor, DSP), microprocessor, specially With integrated circuit (Application Specific Integrated Circuit, ASIC), microcontroller (Microcontroller Unit, MCU), field programmable gate array (Field Programmable Gate Array, FPGA) or for realizing logical operation integrated circuit.For example, processor 1001 can be a monokaryon (single- CPU) processor or multicore (multi-CPU) processor.The multiple processors or unit for including in processor 1001 can be collection In Cheng Yi chip or on multiple and different chips.
User interface 1003 may include that keyboard, physical button (push button, rocker buttons etc.), dial, sliding are opened Pass, control stick, click idler wheel, (light mouse is not show the touch sensitive surface visually exported, or formed by touch screen to light mouse Touch sensitive surface extension) etc..Network interface 1004 optionally may include standard wireline interface and wireless interface (such as WI-FI interface).
Memory 1005 can be non-power-failure volatile memory, e.g. EMMC (Embedded Multi Media Card, embedded multi-media card), UFS (Universal Flash Storage, Common Flash Memory storage) or read-only memory (Read-Only Memory, ROM), optionally, memory 1005 include the flash in the embodiment of the present application, or can be deposited The other kinds of static storage device for storing up static information and instruction, can also be power down volatile memory (volatile Memory), for example, random access memory (Random Access Memory, RAM) or can store information and instruction its The dynamic memory of his type is also possible to Electrically Erasable Programmable Read-Only Memory (Electrically Erasable Programmable Read-Only Memory, EEPROM), CD-ROM (Compact Disc Read-Only Memory, CD-ROM) or other optical disc storages, optical disc storage (including compression optical disc, laser disc, optical disc, Digital Versatile Disc, Blu-ray Disc Deng), magnetic disk storage medium or other magnetic storage apparatus or can be used in carrying or storing that there is instruction or data structure shape The program code of formula and can by any other computer readable storage medium of computer access, but not limited to this.Optionally, Memory 1005 optionally can also be that at least one is located remotely from the storage system of aforementioned processor 1001.As shown in Figure 10, As may include operating system, network communication module, user interface mould in a kind of memory 1005 of computer storage medium Block and program instruction.
Memory 1005, which can be, to be individually present, and is coupled by connector and processor 1001.Memory 1005 can also To be integrated with processor 1001.Wherein, memory 1005 can store execute application scheme program instruction including All kinds of computer program instructions, and execution is controlled by processor 1001, all kinds of computer program instructions being performed can also It is considered to be the driver of processor 1001.For example, processor 1001 is for executing the computer stored in memory 1005 Program instruction, to realize the method in the application in Fig. 2 embodiment of the method.The computer program instructions quantity is very big, can The computer executable instructions that can be executed by least one processor in processor 1001 are formed, to drive associative processor All kinds of processing are executed, such as support signal of communication Processing Algorithm, operating system or the application of above-mentioned all kinds of wireless communication protocols Program operation.
Display screen 1006, for showing information input by user.Illustratively, display screen 1006 may include display surface Plate and touch panel.Wherein, display panel can be using liquid crystal display (Liquid Crystal Display, LCD), organic Light emitting diode (Organic Light-Emitting Diode, OLED), Light-Emitting Diode (Light Emitting Diode, LED) equipment or cathode-ray tube (Cathode Ray Tube, CRT) etc. are shown to configure display panel.Touch surface Plate, also referred to as touch screen, touch-sensitive screen etc. collect the on it or neighbouring contact of user or Touchless manipulation (such as user It, can also be with using the operation of any suitable object or attachment such as finger, stylus on touch panel or near touch panel Including somatosensory operation；The operation includes the action types such as single-point control operation, multiparty control operation), and according to preset Formula drives corresponding attachment device.
The embodiment of the present application provides another head node, as shown in figure 11, head node 200 at least may include: to A few processor 2001, at least one network interface 2004, user interface 2003, memory 2005, at least one communication are total Line 2002, display screen 2006.Wherein, communication bus 2002 is for realizing the connection communication between these components, it should be understood that head Various components in node 200 can also be coupled by other connectors, other described connectors may include all kinds of interfaces, biography Defeated line or bus etc., in each embodiment of the application, coupling refers to connecting each other by ad hoc fashion, including direct phase It is indirectly connected even or by other equipment.
Wherein, processor 2001 is similar with processor 1001, and details are not described herein.
User interface 2003 is similar with user interface 1003, and details are not described herein.
Memory 2005 is similar with memory 1005, and processor 2001 is for executing the computer stored in memory 2005 Program instruction, to realize the method in the application in Fig. 4 embodiment of the method, details are not described herein.
Display screen 2006 is similar with display screen 1006, and details are not described herein.
The embodiment of the present application provides another leaf node, as shown in figure 12, leaf node 300 at least may include: to It less may include: at least one processor 3001, at least one network interface 3004, user interface 3003, memory 3005, until A few communication bus 3002, display screen 3006.Wherein, communication bus 3002 is logical for realizing the connection between these components Letter, it should be understood that the various components in leaf node 300 can also be coupled by other connectors, other described connectors can Including all kinds of interfaces, transmission line or bus etc., in each embodiment of the application, coupling refers to through the mutual of ad hoc fashion Connection, including be connected directly or be indirectly connected by other equipment.
Wherein, processor 3001 is similar with processor 1001, and details are not described herein.
User interface 3003 is similar with user interface 1003, and details are not described herein.
Memory 3005 is similar with memory 1005, and processor 3001 is for executing the computer stored in memory 3005 Program instruction, to realize the method in the application in Fig. 4 embodiment of the method, details are not described herein.
Display screen 3006 is similar with display screen 1006, and details are not described herein.
The embodiment of the present application also provides another multicast sources, and as shown in figure 13, multicast source 400 at least may include: At least one processor 4001, at least one network interface 4004, user interface 4003, memory 4005, at least one communication Bus 4002, display screen 4006.Wherein, communication bus 4002 is for realizing the connection communication between these components, it should be understood that Various components in multicast source 400 can also be coupled by other connectors, other described connectors may include all kinds of interfaces, Transmission line or bus etc., in each embodiment of the application, coupling refers to connecting each other by ad hoc fashion, including direct It is connected or is indirectly connected by other equipment.
Wherein, processor 4001 is similar with processor 1001, and details are not described herein.
User interface 4003 is similar with user interface 1003, and details are not described herein.
Memory 4005 is similar with memory 1005, and processor 4001 is for executing the computer stored in memory 4005 Program instruction, to realize the method in the application in Fig. 2 embodiment of the method, details are not described herein.
Display screen 4006 is similar with display screen 1006, and details are not described herein.
The embodiment of the present application also provides another multicast sources, and as shown in figure 14, multicast source 500 at least may include: At least one processor 5001, at least one network interface 5004, user interface 5003, memory 5005, at least one communication Bus 5002, display screen 5006.Wherein, communication bus 5002 is for realizing the connection communication between these components, it should be understood that Various components in multicast source 500 can also be coupled by other connectors, other described connectors may include all kinds of interfaces, Transmission line or bus etc., in each embodiment of the application, coupling refers to connecting each other by ad hoc fashion, including direct It is connected or is indirectly connected by other equipment.
Wherein, processor 5001 is similar with processor 1001, and details are not described herein.
User interface 5003 is similar with user interface 1003, and details are not described herein.
Memory 5005 is similar with memory 1005, and processor 5001 is for executing the computer stored in memory 5005 Program instruction, to realize the method in the application in Fig. 4 embodiment of the method, details are not described herein.
Display screen 5006 is similar with display screen 1006, and details are not described herein.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with Relevant hardware is instructed to complete by computer program, the program can be stored in a computer-readable storage medium In, the program is when being executed, it may include such as the process of the embodiment of above-mentioned each method.Wherein, the type of the storage medium Please refer to the description to memory 1005,2005,3005,4005 or 5005.
The embodiment of the present application also provides a kind of computer readable storage medium, stored in the computer readable storage medium There is instruction, when it runs on a computer or a processor, so that computer or processor execute any of the above-described a data transmission One or more steps in method.If each comprising modules of above-mentioned apparatus are realized in the form of SFU software functional unit and conduct Independent product when selling or using, can store in the computer-readable storage medium.
Based on this understanding, the embodiment of the present application also provides a kind of computer program product comprising instruction, the application Technical solution substantially all or part of the part that contributes to existing technology or the technical solution can be in other words It is expressed in the form of software products, which is stored in a storage medium, including some instructions are used So that a computer equipment, mobile terminal or in which processor execute the whole of each embodiment the method for the application Or part steps.The type of the storage medium please refers to the associated description of memory 1005,2005,3005,4005 or 5005.
Step in the embodiment of the present application method can be sequentially adjusted, merged and deleted according to actual needs.
Module in the embodiment of the present application device can be combined, divided and deleted according to actual needs.
The above, above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although referring to before Embodiment is stated the application is described in detail, those skilled in the art should understand that: it still can be to preceding Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these It modifies or replaces, the range of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.

Claims (60)

1. a kind of data transmission method, it is applied to multicast network, the multicast network includes multicast source and multiple nodes, described Multicast source sends multicast data message to each terminal by the multiple node, and the multiple node includes head node, the head Node is the routing forwarding equipment close to the multicast source, and the method is executed by the head node, which is characterized in that the side Method includes:
The head node sends the notice message for carrying the first maximum transmission unit MTU value to the multicast source, so that described group Source is broadcast before sending multicast data message, fragment is carried out to the multicast data message according to first MTU value；Wherein, The first MTU value that the notice message carries is according to the multicast source by each between the head node and each terminal The MTU value that the MTU value of the outgoing interface of a node determines；
The head node receives the multicast source according to the multicast data message of the first MTU value fragment.
2. the method as described in claim 1, which is characterized in that first MTU value is the multicast source by the cephalomere The MTU value of the outgoing interface of each node between point and each terminal；
It is described to include: to multicast data message progress fragment according to first MTU value
It is obtained according to the multicast source by the MTU value of the outgoing interface of each node between the head node and each terminal Minimum value in the MTU value of the outgoing interface of each node；
Fragment is carried out to the data message according to the minimum value in the MTU value of the outgoing interface of each node.
3. the method as described in claim 1, which is characterized in that first MTU value is the multicast source by the cephalomere Minimum value in the MTU value of the outgoing interface of each node between point and each terminal；
It is described to include: to multicast data message progress fragment according to first MTU value
Fragment is carried out to the data message according to the minimum value in the MTU value of the outgoing interface of each node.
4. method as claimed in any one of claims 1-3, which is characterized in that the head node is taken to multicast source transmission Notice message with the first MTU value includes: in the case where the head node monitors that new multicast channel is added, to described group It broadcasts source and sends the notice message for carrying the first MTU value.
5. method as claimed in claim 4, which is characterized in that the head node monitors that new multicast channel addition includes: The head node receives the C multicast message that leaf node is sent, and the C multicast message carries the destination address of multicast channel, and institute State the multicast data message that head node does not receive the multicast channel of the destination address characterization.
6. method as claimed in claim 4, which is characterized in that the head node monitors that new multicast channel addition includes: The head node receives the Multicast Group Registration message of leaf node transmission, wherein the head node is meeting point.
7. method as claimed in claim 4, which is characterized in that the head node monitors that new multicast channel addition includes: The head node receives the multicast information that the multicast source is sent；Wherein, the head node configures Multicast Source Discovery Protocol.
8. method as claimed in any one of claims 1-3, which is characterized in that the head node is taken to multicast source transmission Notice message with the first MTU value includes: that the head node periodically sends the notice report for carrying the first MTU value to multicast source Text.
9. method as claimed in any one of claims 1-3, which is characterized in that the head node is taken to multicast source transmission Notice message with the first MTU value includes: the institute in the case where the head node monitors that first MTU value changes It states head node and sends the notice message for carrying the first MTU value to multicast source.
10. a kind of data transmission method is applied to multicast network, the multicast network includes multicast source and multiple nodes, institute It states multicast source and multicast data message is sent to each terminal by the multiple node, the multiple node includes head node and leaf segment Point, the head node are the routing forwarding equipment close to the multicast source, and the leaf node is the routing turn close to the terminal Equipment is sent out, the method is executed by the head node, which is characterized in that the described method includes:
The head node sends the second notice message for carrying the second maximum transmission unit MTU value to the multicast source, so that institute Multicast source is stated before sending multicast data message, the second MTU value and third notice carried according to second notice message The third MTU value that message carries determines fragment MTU value, and the third notice message is that the leaf node is sent to the multicast source Notice message, the third notice message carries the third MTU value；Wherein, the second of the second notice message carrying MTU value is going out by each node between the head node and each terminal in addition to leaf node according to the multicast source The MTU value that the MTU value of interface determines, the third MTU value that the third notice message carries are the outgoing interfaces of the leaf node MTU value；
The head node receives the multicast source according to the multicast data message of the fragment MTU value fragment.
11. method as claimed in claim 10, which is characterized in that second MTU value is the multicast source by the head The MTU value of the outgoing interface of each node between node and each terminal in addition to leaf node；
The third MTU value that second MTU value carried according to second notice message and third notice message carry determines Fragment MTU value includes:
According to the multicast source by each node between the head node and each terminal in addition to the leaf node The MTU value of outgoing interface and the outgoing interface MTU value of the leaf node obtain the MTU value of the outgoing interface of each node with it is described Minimum value in the MTU value of the outgoing interface of leaf node；The minimum value is the fragment MTU value.
12. method as claimed in claim 10, which is characterized in that second MTU value is the multicast source by the head Minimum value in the MTU value of the outgoing interface of each node between node and each terminal in addition to leaf node；
The third MTU value that second MTU value carried according to second notice message and third notice message carry determines Fragment MTU value includes:
According to the multicast source by each node outgoing interface between the head node and each terminal in addition to leaf node MTU value in minimum value and the MTU value of outgoing interface of the leaf node obtain each section including the leaf node Minimum value in the MTU value of the outgoing interface of point；The minimum value is the fragment MTU value.
13. a kind of data transmission method is applied to multicast network, the multicast network includes multicast source and multiple nodes, institute It states multicast source and multicast data message is sent to each terminal by the multiple node, the multiple node includes head node and leaf segment Point, the head node are the routing forwarding equipment close to the multicast source, and the leaf node is the routing turn close to the terminal Equipment is sent out, the method is executed by the leaf node, which is characterized in that the described method includes:
The leaf node sends the third notice message for carrying third maximum transmission unit MTU value to the multicast source, so that institute Multicast source is stated before sending multicast data message, the second MTU value and the third notice carried according to the second notice message The third MTU value that message carries determines that fragment MTU value, second notice message are that the head node is sent to the multicast source Notice message, second notice message carries second MTU value；Wherein, the second of the second notice message carrying MTU value is going out by each node between the head node and each terminal in addition to leaf node according to the multicast source The MTU value that the MTU value of interface determines；The outgoing interface of the leaf node for the third MTU value that the third notice message carries MTU value；
The leaf node receives the multicast source according to the multicast data message of the fragment MTU value fragment.
14. method as claimed in claim 13, which is characterized in that second MTU value is the multicast source by the head The MTU value of the outgoing interface of each node between node and each terminal in addition to leaf node；
The third MTU value that second MTU value carried according to the second notice message and the third notice message carry determines Fragment MTU value includes:
Go out to connect by each node between the head node and each terminal in addition to leaf node according to the multicast source Mouthful MTU value and the leaf node outgoing interface MTU value obtain each node outgoing interface MTU value and the leaf Minimum value in the MTU value of the outgoing interface of node；The minimum value is the fragment MTU value.
15. method as claimed in claim 13, which is characterized in that second MTU value is the multicast source by the head Minimum value in the MTU value of the outgoing interface of each node between node and each terminal in addition to leaf node；
The third MTU value that second MTU value carried according to the second notice message and the third notice message carry determines Fragment MTU value includes:
Go out to connect by each node between the head node and each terminal in addition to leaf node according to the multicast source The MTU value of the outgoing interface of minimum value and the leaf node in the MTU value of mouth obtains each including the leaf node Minimum value in the MTU value of the outgoing interface of node；The minimum value is the fragment MTU value.
16. the method as described in claim 13-15 any one, which is characterized in that the leaf node is sent out to the multicast source Send the third notice message for carrying third MTU value include: in the case where the leaf node monitors that new multicast channel is added, The third notice message for carrying third MTU value is sent to the multicast source.
17. the method described in claim 16, which is characterized in that the leaf node monitors that packet is added in new multicast channel Include: the leaf node receives the multicast channel that terminal is sent and request is added, and the multicast channel is added request and carries multicast channel Destination address, and the leaf node does not receive the multicast data message of the multicast channel of destination address characterization.
18. the method as described in claim 13-15 any one, which is characterized in that the leaf node is sent out to the multicast source Sending the third notice message for carrying third MTU value includes: that the leaf node periodically sends the 3rd MTU of carrying to the multicast source The third notice message of value.
19. the method as described in claim 13-15 any one, which is characterized in that the leaf node is sent out to the multicast source Sending the third notice message for carrying third MTU value includes: to monitor the MTU value hair of the leaf node outgoing interface in the leaf node In the case where changing, the leaf node sends the third notice message for carrying third MTU value to the multicast source.
20. a kind of data transmission method is applied to multicast network, the multicast network includes multicast source and multiple nodes, institute It states multicast source and multicast data message is sent to each terminal by the multiple node, the multiple node includes head node, described Head node is the routing forwarding equipment close to the multicast source, and the method is executed by the multicast source, which is characterized in that described Method includes:
The multicast source receives the first maximum transmission unit of carrying that the head node is sent before sending multicast data message The notice message of MTU value；Wherein, the first MTU value that the notice message carries is according to the multicast source by the cephalomere The MTU value that the MTU value of the outgoing interface of each node between point and each terminal determines；
The multicast source carries out fragment to multicast data message according to the first MTU value that the notice message carries；
The multicast source sends the multicast data message after fragment to the head node.
21. method as claimed in claim 20, which is characterized in that first MTU value is the multicast source by the head The MTU value of the outgoing interface of each node between node and each terminal；
The method further includes: the multicast source passes through between the head node and each terminal according to the multicast source Each node outgoing interface the MTU value outgoing interface that obtains each node MTU value in minimum value；
The first MTU value that the multicast source is carried according to the notice message carries out fragment to multicast data message
The multicast source carries out the multicast data message according to the minimum value in the MTU value of the outgoing interface of each node Fragment.
22. method as claimed in claim 20, which is characterized in that first MTU value is the multicast source by the head Minimum value in the MTU value of each node outgoing interface between node and each terminal；
The first MTU value that the multicast source is carried according to the notice message carries out fragment to multicast data message
The multicast source carries out the multicast data message according to the minimum value in the MTU value of the outgoing interface of each node Fragment.
23. a kind of data transmission method is applied to multicast network, the multicast network includes multicast source and multiple nodes, institute It states multicast source and multicast data message is sent to each terminal by the multiple node, the multiple node includes head node and leaf segment Point, the head node are the routing forwarding equipment close to the multicast source, and the leaf node is the routing turn close to the terminal Equipment is sent out, the method is executed by the multicast source, which is characterized in that the described method includes:
The multicast source receives the second notice message of carrying the second maximum transmission unit MTU value that the head node is sent；Its In, the second MTU value that second notice message carries is according to the multicast source by the head node and each terminal Between each node in addition to leaf node outgoing interface the MTU value that determines of MTU value；
The multicast source receives the third notice message for the carrying third MTU value that the leaf node is sent；Wherein, the third is logical The third MTU value for knowing message carrying is the MTU value of the outgoing interface of the leaf node；
The multicast source determines fragment MTU value according to second MTU value and the third MTU value；
The multicast source carries out fragment to multicast data message according to the fragment MTU value；
The multicast source sends the multicast data message after the fragment to the head node.
24. method as claimed in claim 23, which is characterized in that second MTU value is the multicast source by the head The MTU value of the outgoing interface of each node between node and each terminal in addition to leaf node；The fragment MTU value is described MTU value and institute of the multicast source by the outgoing interface of each node between the head node and each terminal in addition to leaf node State the minimum value in the MTU value of the outgoing interface of leaf node.
25. method as claimed in claim 23, which is characterized in that second MTU value is that the multicast source passes through the head Minimum value in the MTU value of the outgoing interface of each node between node and each terminal in addition to leaf node；The fragment MTU value is the minimum value in second MTU value and third MTU value.
26. a kind of head node is applied to multicast network, the multicast network includes multicast source and multiple nodes, the multicast source Multicast data message is sent to each terminal by the multiple node, the multiple node includes head node, and the head node is Close to the routing forwarding equipment of the multicast source, which is characterized in that the head node includes:
First transmission unit, for sending the notice message for carrying the first maximum transmission unit MTU value to the multicast source, so that The multicast source carries out fragment to the multicast data message before sending multicast data message, according to first MTU value； Wherein, the first MTU value that the notice message carries be according to the multicast source by the head node and each terminal it Between each node outgoing interface MTU value determine MTU value；
First receiving unit, for receiving the multicast source according to the multicast data message of the first MTU value fragment.
27. head node as claimed in claim 26, which is characterized in that first MTU value is described in the multicast source passes through The MTU value of the outgoing interface of each node between head node and each terminal.
28. head node as claimed in claim 26, which is characterized in that first MTU value is described in the multicast source passes through Minimum value in the MTU value of the outgoing interface of each node between head node and each terminal.
29. the head node as described in claim 26-28 any one, which is characterized in that first transmission unit is used for In the case that the head node monitors that new multicast channel is added, Xiang Suoshu multicast source sends the notice for carrying the first MTU value Message.
30. head node as claimed in claim 29, which is characterized in that the head node monitors that packet is added in new multicast channel Include: the head node receives the C multicast message that leaf node is sent, and the C multicast message carries the destination address of multicast channel, and The head node does not receive the multicast data message of the multicast channel of the destination address characterization.
31. head node as claimed in claim 29, which is characterized in that the head node monitors that packet is added in new multicast channel Include: the head node receives the Multicast Group Registration message of leaf node transmission, wherein the head node is meeting point.
32. head node as claimed in claim 29, which is characterized in that the head node monitors that packet is added in new multicast channel Include: the head node receives the multicast information that the multicast source is sent；Wherein, the head node configuration multicast Feed Discovery association View.
33. the head node as described in claim 26-28 any one, which is characterized in that first transmission unit is for week Phase property sends the notice message for carrying the first MTU value to multicast source.
34. the head node as described in claim 26-28 any one, which is characterized in that first transmission unit is used for In the case that the head node monitors that first MTU value changes, the notice report for carrying MTU value is sent to multicast source Text.
35. a kind of head node is applied to multicast network, the multicast network includes multicast source and multiple nodes, the multicast Source sends multicast data message to each terminal by the multiple node, and the multiple node includes head node and leaf node, institute Stating head node is the routing forwarding equipment close to the multicast source, and the leaf node sets for the routing forwarding close to the terminal It is standby, which is characterized in that the head node includes:
Second transmission unit, for sending the second notice message for carrying the second maximum transmission unit MTU value to the multicast source, So that the multicast source is before sending multicast data message, the second MTU value for being carried according to second notice message and the The third MTU value that three notice messages carry determines fragment MTU value, and the third notice message is the leaf node to the multicast The notice message that source is sent, the third notice message carry the third MTU value；Wherein, second notice message carries The second MTU value be according to the multicast source by each section between the head node and each terminal in addition to leaf node The MTU value that the MTU value of the outgoing interface of point determines, the third MTU value that the third notice message carries are going out for the leaf node The MTU value of interface；
Second receiving unit, for receiving the multicast source according to the multicast data message of the fragment MTU value fragment.
36. head node as claimed in claim 35, which is characterized in that second MTU value is described in the multicast source passes through The MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node.
37. head node as claimed in claim 35, which is characterized in that second MTU value is described in the multicast source passes through Minimum value in the MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node.
38. a kind of leaf node is applied to multicast network, the multicast network includes multicast source and multiple nodes, the multicast Source sends multicast data message to each terminal by the multiple node, and the multiple node includes head node and leaf node, institute Stating head node is the routing forwarding equipment close to the multicast source, and the leaf node sets for the routing forwarding close to the terminal It is standby, which is characterized in that the leaf node includes:
Third transmission unit, for sending the third notice message for carrying third maximum transmission unit MTU value to the multicast source, So that the multicast source is before sending multicast data message, the second MTU value for being carried according to the second notice message and described the The third MTU value that three notice messages carry determines fragment MTU value, and second notice message is the head node to the multicast The notice message that source is sent, second notice message carry second MTU value；Wherein, second notice message carries The second MTU value be according to the multicast source by each section between the head node and each terminal in addition to leaf node The MTU value that the MTU value of the outgoing interface of point determines；The third MTU value that the third notice message carries is going out for the leaf node Interface mtu value；
Third receiving unit, for receiving the multicast source according to the multicast data message of the fragment MTU value fragment.
39. leaf node as claimed in claim 38, which is characterized in that second MTU value is described in the multicast source passes through The MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node.
40. leaf node as claimed in claim 38, which is characterized in that second MTU value is described in the multicast source passes through Minimum value in the MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node.
41. such as the described in any item leaf nodes of claim 38-40, which is characterized in that the third transmission unit is for supervising In the case where measuring new multicast channel addition, Xiang Suoshu multicast source sends the third notice message for carrying third MTU value.
42. leaf node as claimed in claim 41, which is characterized in that described to monitor that new multicast channel addition includes: institute It states leaf node and receives the multicast channel addition request that terminal is sent, the purpose that request carries multicast channel is added in the multicast channel Address, and the leaf node does not receive the multicast data message of the multicast channel of the destination address characterization.
43. such as the described in any item leaf nodes of claim 38-40, which is characterized in that the third transmission unit is used for the period Property to the multicast source send carry third MTU value third notice message.
44. such as the described in any item leaf nodes of claim 38-40, which is characterized in that the third transmission unit is used in institute It states in the case that leaf node monitors that the MTU value of the leaf node outgoing interface changes, Xiang Suoshu multicast source, which is sent, carries the The third notice message of three MTU values.
45. a kind of multicast source is applied to multicast network, the multicast network includes multicast source and multiple nodes, the multicast Source sends multicast data message to each terminal by the multiple node, and the multiple node includes head node, the head node For close to the routing forwarding equipment of the multicast source, which is characterized in that the multicast source includes:
4th receiving unit, it is maximum for before sending multicast data message, receiving the carrying first that the head node is sent The notice message of transmission unit MTU value；Wherein, the first MTU value that the notice message carries is described in the multicast source passes through The MTU value that the MTU value of the outgoing interface of each node between head node and each terminal determines；
First sharding unit, the first MTU value for being carried according to the notice message carry out fragment to multicast data message；
4th transmission unit, for sending the multicast data message after fragment to the head node.
46. multicast source as claimed in claim 45, which is characterized in that first MTU value is described in the multicast source passes through The MTU value of the outgoing interface of each node between head node and each terminal；
The multicast source further include: obtaining unit, for according to the multicast source by the head node and each terminal it Between each node outgoing interface the MTU value outgoing interface that obtains each node MTU value in minimum value；
First sharding unit, for the minimum value in the MTU value according to the outgoing interface of each node to the multicast Data message carries out fragment.
47. multicast source as claimed in claim 45, which is characterized in that first MTU value is described in the multicast source passes through Minimum value in the MTU value of the outgoing interface of each node between head node and each terminal；
First sharding unit, for the minimum value in the MTU value according to the outgoing interface of each node to the multicast Data message carries out fragment.
48. a kind of multicast source is applied to multicast network, the multicast network includes multicast source and multiple nodes, the multicast Source sends multicast data message to each terminal by the multiple node, and the multiple node includes head node and leaf node, institute Stating head node is the routing forwarding equipment close to the multicast source, and the leaf node sets for the routing forwarding close to the terminal It is standby, which is characterized in that the multicast source includes:
5th receiving unit, for receiving the second notice of carrying the second maximum transmission unit MTU value that the head node is sent Message；Wherein, the second MTU value that second notice message carries be according to the multicast source by the head node with it is described The MTU value that the MTU value of the outgoing interface of each node between each terminal in addition to leaf node determines；
6th receiving unit, for receiving the third notice message for the carrying third MTU value that the leaf node is sent；Wherein, institute State the MTU value that the third MTU value that third notice message carries is the outgoing interface of the leaf node；
Determination unit, for determining fragment MTU value according to second MTU value and the third MTU value；
Second sharding unit, for carrying out fragment to multicast data message according to the fragment MTU value；
5th transmission unit, for sending the multicast data message after the fragment to the head node.
49. multicast source as claimed in claim 48, which is characterized in that second MTU value is described in the multicast source passes through The MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node；The fragment MTU value is institute State multicast source by the outgoing interface of each node between the head node and each terminal in addition to leaf node MTU value with Minimum value in the MTU value of the outgoing interface of the leaf node.
50. multicast source as claimed in claim 48, which is characterized in that second MTU value is described in the multicast source passes through Minimum value in the MTU value of the outgoing interface of each node between head node and each terminal in addition to leaf node；Described point Piece MTU value is the minimum value in second MTU value and third MTU value.
51. a kind of head node characterized by comprising processor, memory and transceiver, in which:
The processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes such as claim Data transmission method described in 1-9 any one.
52. a kind of head node characterized by comprising processor, memory and transceiver, in which:
The processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes such as claim Data transmission method described in 10-12 any one.
53. a kind of leaf node characterized by comprising processor, memory and transceiver, in which:
The processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes such as claim Data transmission method described in 13-19 any one.
54. a kind of multicast source characterized by comprising processor, memory and transceiver, in which:
The processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes such as claim Data transmission method described in 20-22 any one.
55. a kind of multicast source characterized by comprising processor, memory and transceiver, in which:
The processor, the memory and the transceiver are connected with each other, and the memory is for storing computer program, institute Stating computer program includes program instruction, and the processor is configured for calling described program instruction, executes such as claim Data transmission method described in 23-25 any one.
56. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey Sequence, the computer program include program instruction, and described program instructs when being executed by a processor, execute the processor such as Data transmission method described in any one of claim 1-9.
57. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey Sequence, the computer program include program instruction, and described program instructs when being executed by a processor, execute the processor such as Data transmission method described in claim 10-12 any one.
58. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey Sequence, the computer program include program instruction, and described program instructs when being executed by a processor, execute the processor such as Data transmission method described in claim 13-19 any one.
59. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey Sequence, the computer program include program instruction, and described program instructs when being executed by a processor, execute the processor such as Data transmission method described in claim 20-22 any one.
60. a kind of computer readable storage medium, which is characterized in that the computer-readable recording medium storage has computer journey Sequence, the computer program include program instruction, and described program instructs when being executed by a processor, execute the processor such as Data transmission method described in claim 23-25 any one.
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