Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific realApplying mode, the present invention is described in further detail.
It is the important milestone of network Development depending on networking, is a real-time network, can be realized HD video real-time Transmission,Push numerous Internet applications to HD video, high definition is face-to-face.
Real-time high-definition video switching technology is used depending on networking, it can be such as high in a network system by required serviceClear video conference, Intellectualized monitoring analysis, emergency command, digital broadcast television, delay TV, the Web-based instruction, shows video monitoringField live streaming, VOD program request, TV Mail, individual character records (PVR), Intranet (manages) channel by oneself, intelligent video Broadcast Control, information publicationAll be incorporated into a service system etc. services such as tens of kinds of videos, voice, picture, text, communication, data, by TV orComputer realizes that high-definition quality video plays.
Embodiment in order to enable those skilled in the art to better understand the present invention is introduced to depending on networking below:
Depending on networking, applied portion of techniques is as described below:
Network technology (Network Technology)
Traditional ethernet (Ethernet) is improved depending on the network technology innovation networked, with potential huge on networkVideo flow.(Circuit is exchanged different from simple network packet packet switch (Packet Switching) or lattice networkSwitching), Streaming demand is met using Packet Switching depending on networking technology.Has grouping depending on networking technologyFlexible, the simple and low price of exchange, is provided simultaneously with the quality and safety assurance of circuit switching, it is virtually electric to realize the whole network switch typeThe seamless connection of road and data format.
Switching technology (Switching Technology)
Two advantages of asynchronous and packet switch that Ethernet is used depending on networking eliminate Ethernet under the premise of complete compatible and lackIt falls into, has the end-to-end seamless connection of the whole network, direct user terminal, directly carrying IP data packet.User data is in network-wide basisIt is not required to any format conversion.It is the more advanced form of Ethernet depending on networking, is a real-time exchange system, can be realized at present mutuallyThe whole network large-scale high-definition realtime video transmission that networking cannot achieve pushes numerous network video applications to high Qinghua, unitizes.
Server technology (Server Technology)
It is different from traditional server, its Streaming Media depending on the server technology in networking and unified video systemTransmission be built upon it is connection-oriented on the basis of, data-handling capacity is unrelated with flow, communication time, single network layer energyEnough transmitted comprising signaling and data.For voice and video business, handled depending on networking and unified video system Streaming MediaComplexity many simpler than data processing, efficiency substantially increase hundred times or more than traditional server.
Reservoir technology (Storage Technology)
The ultrahigh speed reservoir technology of unified video system in order to adapt to the media content of vast capacity and super-flow andUsing state-of-the-art real time operating system, the programme information in server instruction is mapped to specific hard drive space, mediaContent is no longer pass through server, and moment is directly delivered to user terminal, and user waits typical time less than 0.2 second.It optimizesSector distribution greatly reduces the mechanical movement of hard disc magnetic head tracking, and resource consumption only accounts for the 20% of the internet ad eundem IP, butThe concurrent flow greater than 3 times of traditional disk array is generated, overall efficiency promotes 10 times or more.
Network security technology (Network Security Technology)
Depending on the structural design networked by servicing independent licence system, equipment and the modes such as user data is completely isolated every timeThe network security problem that puzzlement internet has thoroughly been eradicated from structure, does not need antivirus applet, firewall generally, has prevented blackThe attack of visitor and virus, structural carefree secure network is provided for user.
It services innovative technology (Service Innovation Technology)
Business and transmission are fused together by unified video system, whether single user, private user or a netThe sum total of network is all only primary automatic connection.User terminal, set-top box or PC are attached directly to unified video system, obtain richThe multimedia video service of rich colorful various forms.Unified video system is traditional to substitute with table schema using " menu type "Complicated applications programming, considerably less code, which can be used, can be realized complicated application, realize the new business innovation of " endless ".
Networking depending on networking is as described below:
It is a kind of central controlled network structure depending on networking, which can be Tree Network, Star network, ring network etc. classType, but centralized control node is needed to control whole network in network on this basis.
As shown in Figure 1, being divided into access net and Metropolitan Area Network (MAN) two parts depending on networking.
The equipment of access mesh portions can be mainly divided into 3 classes: node server, access switch, terminal (including various machinesTop box, encoding board, memory etc.).Node server is connected with access switch, and access switch can be with multiple terminal phasesEven, and it can connect Ethernet.
Wherein, node server is the node that centralized control functions are played in access net, can control access switch and terminal.Node server can directly be connected with access switch, can also directly be connected with terminal.
Similar, the equipment of metropolitan area mesh portions can also be divided into 3 classes: metropolitan area server, node switch, node serveDevice.Metropolitan area server is connected with node switch, and node switch can be connected with multiple node servers.
Wherein, node server is the node server for accessing mesh portions, i.e. node server had both belonged to access wet endPoint, and belong to metropolitan area mesh portions.
Metropolitan area server is the node that centralized control functions are played in Metropolitan Area Network (MAN), can control node switch and node serveDevice.Metropolitan area server can be directly connected to node switch, can also be directly connected to node server.
It can be seen that be entirely a kind of central controlled network structure of layering depending on networking network, and node server and metropolitan areaThe network controlled under server can be the various structures such as tree-shaped, star-like, cyclic annular.
Visually claim, access mesh portions can form unified video system (part in virtual coil), multiple unified video systemsSystem can form view networking；Each unified video system can be interconnected by metropolitan area and wide area depending on networking.
Classify depending on networked devices
1.1 embodiment of the present invention can be mainly divided into 3 classes: server depending on the equipment in networking, interchanger (including etherNet gateway), terminal (including various set-top boxes, encoding board, memory etc.).Depending on networking can be divided on the whole Metropolitan Area Network (MAN) (orNational net, World Wide Web etc.) and access net.
1.2 equipment for wherein accessing mesh portions can be mainly divided into 3 classes: node server, access switch (including etherNet gateway), terminal (including various set-top boxes, encoding board, memory etc.).
The specific hardware structure of each access network equipment are as follows:
Node server:
As shown in Fig. 2, mainly including Network Interface Module 201, switching engine module 202, CPU module 203, disk arrayModule 204；
Wherein, Network Interface Module 201, the Bao Jun that CPU module 203, disk array module 204 are come in enter switching engineModule 202；Switching engine module 202 look into the operation of address table 205 to the packet come in, to obtain the navigation information of packet；And the packet is stored according to the navigation information of packet the queue of corresponding pack buffer 206；If the queue of pack buffer 206 is closeIt is full, then it abandons；All pack buffer queues of 202 poll of switching engine mould, are forwarded: 1) port if meeting the following conditionsIt is less than to send caching；2) the queue package counting facility is greater than zero.Disk array module 204 mainly realizes the control to hard disk, includingThe operation such as initialization, read-write to hard disk；CPU module 203 is mainly responsible between access switch, terminal (not shown)Protocol processes, to address table 205 (including downlink data packet address table, upstream data packet address table, data packet addressed table)Configuration, and, the configuration to disk array module 204.
Access switch:
As shown in figure 3, mainly including Network Interface Module (downstream network interface module 301, uplink network interface module302), switching engine module 303 and CPU module 304；
Wherein, the packet (upstream data) that downstream network interface module 301 is come in enters packet detection module 305；Packet detection mouldWhether mesh way address (DA), source address (SA), type of data packet and the packet length of the detection packet of block 305 meet the requirements, if met,It then distributes corresponding flow identifier (stream-id), and enters switching engine module 303, otherwise abandon；Uplink network interface mouldThe packet (downlink data) that block 302 is come in enters switching engine module 303；The data packet that CPU module 204 is come in enters switching engineModule 303；Switching engine module 303 look into the operation of address table 306 to the packet come in, to obtain the navigation information of packet；If the packet into switching engine module 303 is that downstream network interface is gone toward uplink network interface, in conjunction with flow identifier(stream-id) packet is stored in the queue of corresponding pack buffer 307；If the queue of the pack buffer 307 is close full,It abandons；If the packet into switching engine module 303 is not that downstream network interface is gone toward uplink network interface, according to packetNavigation information is stored in the data packet queue of corresponding pack buffer 307；If the queue of the pack buffer 307 is close full,Then abandon.
All pack buffer queues of 303 poll of switching engine module, are divided to two kinds of situations in embodiments of the present invention:
If the queue is that downstream network interface is gone toward uplink network interface, meets the following conditions and be forwarded: 1)It is less than that the port sends caching；2) the queue package counting facility is greater than zero；3) token that rate control module generates is obtained；
If the queue is not that downstream network interface is gone toward uplink network interface, meets the following conditions and is forwarded:1) it is less than to send caching for the port；2) the queue package counting facility is greater than zero.
Rate control module 208 is configured by CPU module 204, to all downlink networks in programmable intervalInterface generates token toward the pack buffer queue that uplink network interface is gone, to control the code rate of forwarded upstream.
CPU module 304 is mainly responsible for the protocol processes between node server, the configuration to address table 306, and,Configuration to rate control module 308.
Ethernet association turns gateway:
As shown in figure 4, mainly including Network Interface Module (downstream network interface module 401, uplink network interface module402), switching engine module 403, CPU module 404, packet detection module 405, rate control module 408, address table 406, Bao HuanStorage 407 and MAC adding module 409, MAC removing module 410.
Wherein, the data packet that downstream network interface module 401 is come in enters packet detection module 405；Packet detection module 405 is examinedEthernet mac DA, ethernet mac SA, Ethernet length or frame type, the view networking mesh way address of measured data packetDA, whether meet the requirements depending on networking source address SA, depending on networking data Packet type and packet length, corresponding stream is distributed if meetingIdentifier (stream-id)；Then, MAC DA, MAC SA, length or frame type are subtracted by MAC removing module 410(2byte), and enter corresponding receive and cache, otherwise abandon；
Downstream network interface module 401 detects the transmission caching of the port, according to the view of packet networking mesh if there is Bao ZeAddress D A knows the ethernet mac DA of corresponding terminal, adds the ethernet mac DA of terminal, Ethernet assists the MAC for turning gatewaySA, Ethernet length or frame type, and send.
The function that Ethernet association turns other modules in gateway is similar with access switch.
Terminal:
It mainly include Network Interface Module, Service Processing Module and CPU module；For example, set-top box mainly connects including networkMouth mold block, video/audio encoding and decoding engine modules, CPU module；Encoding board mainly includes Network Interface Module, video encoding engineModule, CPU module；Memory mainly includes Network Interface Module, CPU module and disk array module.
The equipment of 1.3 metropolitan area mesh portions can be mainly divided into 2 classes: node server, node switch, metropolitan area server.Wherein, node switch mainly includes Network Interface Module, switching engine module and CPU module；Metropolitan area server mainly includesNetwork Interface Module, switching engine module and CPU module are constituted.
2, networking data package definition is regarded
2.1 access network data package definitions
Access net data packet mainly include following sections: destination address (DA), source address (SA), reserve bytes,payload(PDU)、CRC。
As shown in the table, the data packet for accessing net mainly includes following sections:
Wherein:
Destination address (DA) is made of 8 bytes (byte), and first character section indicates type (such as the various numbers of data packetAccording to packet, multicast packet, unicast packet etc.), be up to 256 kinds of possibility, the second byte to the 6th byte is metropolitan area net address,Seven, the 8th bytes are access net address；
Source address (SA) is also to be made of 8 bytes (byte), is defined identical as destination address (DA)；
Reserve bytes are made of 2 bytes；
The part payload has different length according to the type of different datagrams, is if it is various data packets64 bytes are 32+1024=1056 bytes if it is single group unicast packets words, are not restricted to above 2 kinds certainly；
CRC is made of 4 bytes, and calculation method follows the Ethernet CRC algorithm of standard.
2.2 Metropolitan Area Network (MAN) packet definitions
The topology of Metropolitan Area Network (MAN) is pattern, may there is 2 kinds, connection even of more than two kinds, i.e. node switching between two equipmentIt can all can exceed that 2 kinds between machine and node server, node switch and node switch, node switch and node serverConnection.But the metropolitan area net address of metropolitan area network equipment is uniquely, to close to accurately describe the connection between metropolitan area network equipmentSystem, introduces parameter in embodiments of the present invention: label, uniquely to describe a metropolitan area network equipment.
(Multi-Protocol Label Switch, multiprotocol label are handed over by the definition of label and MPLS in this specificationChange) label definition it is similar, it is assumed that between equipment A and equipment B there are two connection, then data packet from equipment A to equipment B justThere are 2 labels, data packet also there are 2 labels from equipment B to equipment A.Label is divided into label, outgoing label, it is assumed that data packet entersThe label (entering label) of equipment A is 0x0000, and the label (outgoing label) when this data packet leaves equipment A may reform into0x0001.The networking process of Metropolitan Area Network (MAN) is to enter network process under centralized control, also means that address distribution, the label of Metropolitan Area Network (MAN)Distribution be all to be dominated by metropolitan area server, node switch, node server be all passively execute, this point withThe label distribution of MPLS is different, and the distribution of the label of MPLS is the result that interchanger, server are negotiated mutually.
As shown in the table, the data packet of Metropolitan Area Network (MAN) mainly includes following sections:
| DA | SA | Reserved | Label | Payload | CRC |
That is destination address (DA), source address (SA), reserve bytes (Reserved), label, payload (PDU), CRC.ItsIn, the format of label, which can refer to, such as gives a definition: label is 32bit, wherein high 16bit retains, only with low 16bit, its positionSet is between the reserve bytes and payload of data packet.
Referring to Fig. 5, a kind of step flow chart of data transmission method embodiment based on view networking of the invention is shown,This method can be applied to view networked system, and this method can specifically include following steps:
Step 501: obtaining the data to be transmitted packet with view networking data format by the first view networked devices.
In the embodiment of the present invention, first depending on any appliance that networked devices are in view networked system, and can be terminal can alsoWith server, there are multiple view networked terminals in view networked system and regard networked server, between these terminal and serversCan carry out data sends and receivees operation, due to realizing that both ends communicate using the mode of face-to-face communication depending on networking, whenFirst when getting data to be transmitted packet depending on networked devices, and the data content in the possible data to be transmitted packet is more, data packetIt is excessive, it is likely to result in the possibility of delay or packet loss in the transmission, for example, two view networked terminals are when carrying out video callingIt is transmitted using high-definition image, or carries out the transmission of mass data while video calling, therefore the application propositionTechnical solution carries out such as compression processing to data packet to be transmitted, realizes the stabilization of data and quickly transmission.
Step 502: utilizing preset data conversion tools, be converted to data to be transmitted packet depending on networked devices by firstTransmission data packet with goal-selling format.
Illustratively, using data conversion tools pre-loaded on the first view networked devices, data packet to be transmitted is carried outProcessing, makes it have goal-selling format.
Wherein, data conversion tools select GNUzip, are abbreviated as the compressing file work that Gzip is a GNU free softwareTool, is used for the compressing file of unix system, is gz using Gzip treated file suffixes, i.e. Gzip format, format isA kind of very universal data compression format is used on internet.Since Gzip coding on the http protocol is that one kind is used to changeInto the technology of web application performance, the Web site of big flow is usually using Gzip compress technique for providing faster dataThe speed of response, this is usually a function installing in www server, accesses the website in this server when there is userWhen, it is transferred to visiting computer again after needing the web page contents obtained to be compressed user using this function in serverIt is shown in browser, illustratively, can reach former number after compressing using Gzip to plain text content in Web browserAccording to the 40% of file size, therefore the rate in transmission process is substantially increased, such as can be after user clicks network address quicklyWebpage corresponding content is shown.Therefore the technical solution that the application proposes is by the Gzip tool application in view networked systemTerminal, data packet is handled using the client for being equipped with data conversion tools before carrying out data transmission, so as toObtain more preferably laser propagation effect.
Step 503: transmission data packet is transmitted to the second view networked devices.
Wherein, second is any appliance regarded in networked system depending on networked devices, can be terminal and is also possible to server.
Optionally, the transmission data packet with object format step 502 converted is transmitted, that is, from firstThe second view networked devices are sent to by data packet is transmitted depending on networked devices.
Step 504: receiving transmission data packet by the second view networked devices.
In conclusion the embodiment of the present invention can be applied in view networked system, have by first depending on networked devices acquisitionDepending on the data to be transmitted packet of networking data format；It, will be to be passed depending on networked devices by first using preset data conversion toolsTransmission of data packet is converted to the transmission data packet with goal-selling format；Transmission data packet is transmitted to the second view networked devices；Transmission data packet is received by the second view networked devices；Wherein, first is view connection depending on networked devices depending on networked devices and secondAny appliance in net system.Therefore, the transmission that can be realized the compressed data in view networking, optimizes data transfer operation,Improve transmission rate.
Referring to Fig. 6, a kind of specific steps stream of data transmission method embodiment based on view networking of the invention is shownCheng Tu, this method can also include the following steps:
Step 505: utilizing data conversion tools, be converted into the transmission data packet received depending on networked devices by secondDepending on the received data packet of networking data format.
Step 506: exporting received data packet by the second view networked devices.
Illustratively, second needs to carry out reconvert to the transmission data packet received depending on networked devices, that is, from defaultThe transmission data packet of object format is converted to the received data packet for meeting view networking data format, in order to the second view networked devicesThe data are exported, such as the high-definition image data in received data packet are shown depending on networked devices using second,Or the audio data of high tone quality plays out.
Referring to Fig. 7, a kind of specific step of data transmission method embodiment of the method based on view networking of the invention is shownRapid flow chart, using preset data conversion tools described in step 502, by the first view networked devices by data to be transmitted packetThe transmission data with goal-selling format are converted to, can specifically include following steps:
Step 5021: utilizing data conversion tools, data to be transmitted packet is subjected to compression processing.
Step 5022: compressed data to be transmitted packet being determined as to transmit data packet.
Optionally, for data conversion tools for carrying out data compression step, goal-selling format is compressed format, that is,Corresponding suffix is generated after compressing data to be transmitted using Gzip tool and is the transmission data packet of gz format, then is carried out to the transmissionData packet is from the first view networked devices to the transmission the second view networked devices.
Referring to Fig. 8, a kind of specific step of data transmission method embodiment of the method based on view networking of the invention is shownRapid flow chart utilizes data conversion tools, the transmission data packet that will be received by second depending on networked devices described in step 505It is converted into the received data packet of view networking data format, can specifically include following steps:
Step 5051: utilizing data conversion tools, processing is unziped it to transmission data packet.
Step 5052: the transmission data packet after decompression is determined as received data packet.
Illustratively, after second receives transmission data packet depending on networked devices, again using data conversion tools to transmissionData packet unzips it, that is, is converted into the data packet of view networking data format, i.e. received data packet, so as to secondReceived data packet is exported depending on networked devices.
Referring to Fig. 9, a kind of structural block diagram of data transmission device based on view networking of the invention is shown, which canTo be applied to view networked system, described device includes:
Module 910 is obtained, for obtaining the data to be transmitted with view networking data format by the first view networked devicesPacket.
Conversion module 920 regards networked devices for data to be transmitted by first for utilizing preset data conversion toolsPacket is converted to the transmission data with goal-selling format.
Transmission module 930 is transmitted to the second view networked devices for that will transmit data packet.
Receiving module 940, for receiving data to be transmitted packet by the second view networked devices.
Wherein, first is any appliance regarded in networked system depending on networked devices depending on networked devices and second.
On the basis of Fig. 9, should fill 900 based on the data transmission depending on networking can also include:
Conversion module is also used to using data conversion tools, the transmission data that will be received by second depending on networked devicesPacket is converted into the received data packet of view networking data format.
Output module, for exporting received data packet by the second view networked devices.
Optionally, data conversion tools are for carrying out data compression step, and goal-selling format is compressed format, the conversionModule 920, comprising:
Data packet compressing submodule compresses the data to be transmitted packet for utilizing the data conversion toolsProcessing.
Data determine submodule, for the compressed data to be transmitted packet to be determined as the transmission data packet.
Optionally, data conversion tools are with carrying out data decompression operation, conversion module 920, comprising:
Data packet decompression module unzips it processing to transmission data packet for utilizing data conversion tools.
Data determine submodule, for the transmission data packet after decompression to be determined as received data packet.
Optionally, data conversion tools include GNUzip tool.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simplePlace illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are withThe difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculateMachine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software andThe form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer canWith in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program codeThe form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer programThe flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructionsIn each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide theseComputer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminalsStandby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devicesCapable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagramThe device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devicesIn computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packetThe manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagramThe function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so thatSeries of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thusThe instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchartAnd/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows basesThis creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted asIncluding preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to byOne entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operationBetween there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaningCovering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrapThose elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, articleOr the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limitedElement, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
Above to a kind of resource synchronization method and device based on view networking provided by the present invention, detailed Jie has been carried outIt continues, used herein a specific example illustrates the principle and implementation of the invention, and the explanation of above embodiments is onlyIt is to be used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, according to this hairBright thought, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not manageSolution is limitation of the present invention.