CN101707553B - Method, device and system for transmitting synchronous service data - Google Patents
Method, device and system for transmitting synchronous service data Download PDFInfo
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- CN101707553B CN101707553B CN200910211702.3A CN200910211702A CN101707553B CN 101707553 B CN101707553 B CN 101707553B CN 200910211702 A CN200910211702 A CN 200910211702A CN 101707553 B CN101707553 B CN 101707553B
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Abstract
The invention provides a method, a device and a system for transmitting synchronous service data. The method comprises the following steps of: mapping received branch service data of one or more branches to virtual containers corresponding to the branches respectively; extracting the branch service payload of the branch service data and an adjustment opportunity bit corresponding to the branch service payload in each virtual container, and taking the adjustment opportunity bit as a differential time stamp of a branch signal clock of a branch corresponding to the virtual container and a system reference clock; and encapsulating the branch service payload of each branch and the adjustment opportunity bit corresponding to the branch service payload into a packet and transmitting the branch service payload and the adjustment opportunity bit through a packet based network. The invention also provides a device for transmitting the synchronous service data. The invention also provides a system for transmitting the synchronous service data. The method, the device and the system overcome the shortcoming that the packet based network in the prior art cannot realize clock synchronization when transmitting the synchronous service data.
Description
Technical field
The embodiment of the invention relates to communication technical field, relates in particular to a kind of transmission method, device and system of synchronous service data.
Background technology
Along with people's is the increase day by day of the multimedia communication demand of one to collection speech, image and data, to the also raising gradually of requirement of network transmission efficiency.Because Ethernet, asynchronous transfer mode (Asynchronous Transfer Mode; ATM) packet network such as network has characteristics such as bandwidth availability ratio height; (Time DivisionMultiplex TDM) professionally also will carry out the transmission of data through packet network to make the time division multiplexing of in communication evolution data such as traditional voice-bearer video.When utilizing packet network to carry out the transmission of TDM business datum; Need to guarantee the clock synchronization of business data transmission; If the clock frequency of incoming traffic data greater than the clock frequency of outgoing traffic data, then can produce the skip of data, lost frames information; And if the clock frequency of incoming traffic data then can produce reading again of data greater than the clock frequency of outgoing traffic data.
In the prior art; In order to realize the clock synchronization in the data transmission procedure, need be at all client edges (Customer Edge, CE) equipment or all Provider Edges (Provider Edge; PE) introduce clock on the equipment; With this clock as the professional business clock of TDM, so that the clock synchronization of all CE equipment or all PE equipment in the network guarantees the accurate transmission of TDM business datum in packet network.
In realizing process of the present invention; The inventor finds to have following problem in the prior art at least: the networking cost of packet network when carrying the TDM business is very high in the prior art; And can only support a clock zone, the clock synchronization in the time of can not realizing the synchronous service data transmission.
Summary of the invention
The embodiment of the invention provides a kind of transmission method, device and system of synchronous service data; The defective of clock synchronization when solving that packet network can not be realized the synchronous service data transmission in the prior art; Realize that packet network can carry synchronous service, also can carry asynchronous service.
The embodiment of the invention provides a kind of transmission method of time division multiplexing tdm business datum, comprising:
With the branch service data of the one or more branch roads that receive be mapped to respectively with branch road corresponding virtual container in;
From each virtual container, extract the branch service payload and the corresponding adjustment chance bit of said branch service payload of the branch service data in this virtual container, with said adjustment chance bit as the tributary signal clock of the corresponding branch road of this virtual container and the difference timestamp of system reference clock;
The adjustment chance bit-envelope that the branch service payload of each branch road and said branch service payload is corresponding and is transmitted through synchronous ethernet in the grouping message.
The embodiment of the invention provides the transmission method of another kind of time division multiplexing tdm business datum, comprising:
To carry out buffer memory through the grouping message that the synchronous ethernet transmission receives and unpack processing, extract branch service payload and adjustment chance bit in the said grouping message;
With the difference timestamp of said adjustment chance bit as tributary signal clock and system reference clock; Said branch service payload mappings is advanced the branch service Frame, and said branch service Frame mapping is multiplexed in the virtual container according to said adjustment chance bit;
Adjustment chance bit according in the said virtual container recovers the branch service data.
The embodiment of the invention provides a kind of transmitting device of time division multiplexing tdm business datum, comprising:
Mapping block is used for the branch service data of the one or more branch roads that receive are mapped to respectively and branch road corresponding virtual container;
Extraction module; Be used for extracting corresponding branch service payload and the corresponding adjustment chance bit of said branch service payload of branch service data this virtual container from each virtual container that said mapping block generates, with said adjustment chance bit as the tributary signal clock of the corresponding branch road of this virtual container and the difference timestamp of system reference clock;
Group bag module, the corresponding adjustment chance bit-envelope of the branch service payload of each branch road that is used for said extraction module is obtained and said branch service payload be to the grouping message, and transmit through synchronous ethernet.
The embodiment of the invention also provides the transmitting device of another kind of time division multiplexing tdm business datum, comprising:
Parse module is used for the grouping message that receives through the synchronous ethernet transmission is carried out buffer memory and unpacks processing, extracts branch service payload and adjustment chance bit in the said grouping message;
Become frame module; The said adjustment chance bit that is used for said parse module is got access to is as the difference timestamp of tributary signal clock and system reference clock; The said branch service payload mappings that said parse module gets access to is advanced the branch service Frame, and said branch service Frame mapping is multiplexed in the virtual container according to said adjustment chance bit;
Separate mapping block, the adjustment chance bit of the said virtual container that is used for generating according to said one-tenth frame module recovers the branch service data.
The embodiment of the invention provides a kind of transmission system of time division multiplexing tdm business datum, comprises customer edge devices and provider edge equipment, and said provider edge equipment comprises the transmitting device of above-mentioned TDM business datum.
The transmission method of the synchronous service data of the embodiment of the invention, device and system; Be mapped to respectively in the branch road corresponding virtual container through branch service data one or more branch roads; From each virtual container, extract the branch service payload adjustment chance bit corresponding with this branch service payload; With the difference timestamp of adjustment chance bit as tributary signal clock and system reference clock; And with the branch service payload of a plurality of branch roads and corresponding adjustment chance bit-envelope in the grouping message, transmit through packet network, present embodiment will be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock; Make clock synchronization when business datum is transmitted in packet network; Solved the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art, realized that packet network can carry synchronous service, also can carry asynchronous service.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work property, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the flow chart of the transmission method embodiment one of synchronous service data of the present invention;
Fig. 2 is the flow chart of the transmission method embodiment two of synchronous service data of the present invention;
Fig. 3 is the network architecture sketch map among the transmission method embodiment two of synchronous service data of the present invention;
Fig. 4 is the SDH mapping structure sketch map among the transmission method embodiment two of synchronous service data of the present invention;
Fig. 5 is the SONET mapping structure sketch map among the transmission method embodiment two of synchronous service data of the present invention;
Fig. 6 is the flow chart of the transmission method embodiment three of synchronous service data of the present invention;
Fig. 7 is the flow chart of the transmission method embodiment four of synchronous service data of the present invention;
Fig. 8 is the flow chart of the transmission method embodiment five of synchronous service data of the present invention;
Fig. 9 is the flow chart of the transmission method embodiment six of synchronous service data of the present invention;
Figure 10 is the structure chart of the transmitting device embodiment one of synchronous service data of the present invention;
Figure 11 is the structure chart of the transmitting device embodiment two of synchronous service data of the present invention;
Figure 12 is the structure chart of the transmitting device embodiment three of synchronous service data of the present invention;
Figure 13 is the structure chart of the transmitting device embodiment four of synchronous service data of the present invention;
Figure 14 is the structure chart of the transmission system embodiment of synchronous service data of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make the embodiment of the invention clearer; To combine the accompanying drawing in the embodiment of the invention below; Technical scheme in the embodiment of the invention is carried out clear, intactly description; Obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Characteristics such as bandwidth availability ratio height based on packet network; Utilize application that packet network comes the bearer service data more and more widely; Can realize the transfer of data that voice, video etc. are professional through packet network, wherein, circuit emulation service (Circuit Emulation Service; CES) carry one of professional technology of TDM for packet network; And ATM CES provides TDM service emulation through atm network, and ETH (Ethernet) CES representes that then (Metro Ethernet Network MEN) provides TDM service emulation through the Metro Ethernet network; Expanded the scope of business and the user of packet network operator like this, the approach of legacy circuit network to the width data network migration also is provided.Carrying out business datum through packet network; When especially synchronous service data transmits; Need to solve the clock synchronization issue of synchronous service data when transmission; To eliminate the slip produce owing to clock is asynchronous, the nonsynchronous problem of clock when in packet network, transmitting that present embodiment is intended to solve the synchronous service data that exists in the prior art.In the present embodiment, packet network is an example with the synchronous ethernet network, and the packet network loaded service is that example describes with the TDM business, follow-up repeating no more.
Fig. 1 is the flow chart of the transmission method embodiment one of synchronous service data of the present invention, and as shown in Figure 1, present embodiment provides a kind of transmission method of synchronous service data, can comprise the steps:
Step 101; The branch service data of one or more branch roads that PE equipment will receive be mapped to respectively with branch road corresponding virtual container in; Branch service data in the present embodiment can be the branch service data of a branch road, also can be the branch service data of a plurality of branch roads;
Step 102; PE equipment extracts the corresponding adjustment chance bit of branch service payload and said branch service payload of the branch service data in this virtual container from each virtual container, with the adjustment chance bit that obtains as the tributary signal clock of the corresponding branch road of this virtual container and the difference timestamp of system reference clock;
Step 103, PE equipment adjustment chance bit-envelope that the branch service payload of each branch road and this branch service payload is corresponding is transmitted through packet network in the grouping message.
Adjustment chance bit that specifically can each branch service payload and this branch service payload is corresponding encapsulates in the grouping message as the payload of message; Specifically distinguish each grouping message and belong to which branch service payload, then the grouping after encapsulation message is transmitted through packet network through the index in the header.
Present embodiment provides a kind of transmission method of synchronous service data; Through PE equipment the branch service data of one or more branch roads are shone upon; From each virtual container, extract the branch service payload adjustment chance bit corresponding with this branch service payload; With the difference timestamp of adjustment chance bit as tributary signal clock and system reference clock; And the adjustment chance bit that each branch service payload and this branch service payload is corresponding encapsulates in the grouping message as the payload of message, then the grouping after encapsulation message transmitted through packet network, solved the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art; Make packet network can carry synchronous service, also can carry asynchronous service.
It is to be noted; Can be transmitted as example to the TDM business datum with synchronous ethernet carries out bright specifically to the scheme of the embodiment of the invention; In the transmission course TDM business datum that receives is converted into the PACKET packet that transmits in the synchronous ethernet, need the PACKET packet be converted into the TDM business datum simultaneously.The embodiment of the invention is the up direction of transfer of data with the TDM business datum to the direction that the PACKET packet transforms in synchronous ethernet, is the down direction of transfer of data with the PACKET packet to the direction that the TDM business datum transforms, follow-up repeating no more.In addition, when carrying out the transmission of business datum, the PE equipment of synchronous ethernet comprises tributary interface and line interface; Wherein, Tributary interface is that (line interface is and synchronous digital hierarchy (Synchronous Digital Hierarchy for Plesiochronous Digital Hierarchy, the PDH) interface of equipment connection with PDH; SDH) equipment or Synchronous Optical Network (Synchronous Optical Network, SONET) interface of equipment connection.Therefore; PE equipment can be the branch service data from the data that CE equipment receives, and also can be the line activities data, and a plurality of branch service data are through the multiplexing title line activities data of mapping; Correspondingly, the line activities data are multiplexed into a plurality of branch service data through separating mapping.
Fig. 2 is the flow chart of the transmission method embodiment two of synchronous service data of the present invention; As shown in Figure 2; Present embodiment provides a kind of transmission method of synchronous service data; Present embodiment describes with the transmission to synchronous service data of the up direction of transfer of data, and the data that PE equipment receives from CE equipment are the branch service data, and present embodiment can comprise the steps:
Packet network can be the synchronous ethernet network in the present embodiment, when carrying out the transmission of TDM business datum through the synchronous ethernet network, at the edge of synchronous ethernet network configuration PE equipment, receives the branch service data from a plurality of CE equipment.Fig. 3 is the network architecture sketch map among the transmission method embodiment two of synchronous service data of the present invention; As shown in Figure 3; Both sides of the edge at the synchronous ethernet network are symmetrical set PE equipment respectively; PE equipment in the present embodiment can be the PE1 equipment that is positioned at synchronous ethernet one side among Fig. 3, and the 2nd PE equipment can be for being positioned at the PE2 equipment of synchronous ethernet network opposite side, a PE equipment receive CE1 equipment from client, CE2 equipment ... the branch service data of CEn equipment.Branch service data in the present embodiment can be the branch service data of a branch road, also can be the branch service data of a plurality of branch roads.PE equipment is after receiving the branch service data of one or more branch roads; Branch service data to receiving are shone upon respectively and multiplexing process; The branch service data are shone upon respectively in each branch road corresponding virtual container, this virtual container can for the virtual container of SDH (Virtual Container, VC); Also can for the synchronous payload bag of SONET (SynchronousPayload Envelope, SPE).Because virtual container is to be generated by the system reference clock of PE equipment; It is synchronous for all devices; The size that is each virtual container is fixed; Each corresponding virtual container of each branch service data, and the bit number that each virtual container can carry is greater than the bit number that is mapped to the branch service data in this virtual container.After the branch service data map is advanced virtual container, can remain out some bit numbers in the virtual container, remaining bit number is adjustment chance bit.Therefore; This step through with the branch service signal map of one or more branch roads in virtual container; With the corresponding adjustment chance bit of branch service signal that generates each branch road, can embody the time clock correction of tributary signal clock and system reference through this adjustment chance bit.Fig. 4 and shown in Figure 5 is respectively SDH mapping structure sketch map and the SONET mapping structure sketch map among the transmission method embodiment two of synchronous service data of the present invention; With the branch service data of various speed (like 1544kbit/s, 2048kbit/s etc.), respectively through in one of justification adaptation technique threading and the corresponding standard virtual container of this branch service data rate rank.The multiplex mode of SDH/SONET can be realized asynchronous multiplexing, as the PDH signal multiplexing being advanced synchronous transfer mode (Synchronous Transport Module; Hereinafter to be referred as: STM); Also can realize synchronous multiplexing, arrive the multiplexing of STM-4 like STM-1, through multiplexing step and the multiplexing structure that synchronous digital hierarchy comprised; Can insert/tell low speed signal by high speed signal easily, also can not cause the bigger signal time delay and the damage of sliding.
A plurality of branch service data are shone upon multiplexing after; The one PE equipment extracts the branch service payload and the corresponding adjustment chance bit of this branch service payload of the branch service data in this virtual container from each virtual container; Specifically can resolve the branch service data after the mapping; From VC or SPE, parse the branch service payload of these branch service data; The expense of VC or SPE is peeled off, is obtained the corresponding respectively adjustment chance bit of each branch service payload, with a plurality of adjustment chance bits that get access to respectively as the corresponding tributary signal clock of the branch service payload of a plurality of branch roads and the difference timestamp of system reference clock.Because when advancing the branch service data map among VC or the SPE, the branch service data of different rates grade are shone upon among the into different VC or SPE, therefore, the adjustment chance bit that each branch service payload is corresponding is also different.With the difference timestamp of adjustment chance bit as tributary signal clock and system reference clock; When the branch service data being transmitted through the synchronous ethernet network; With the system reference clock is benchmark, knows branch service data shared frequency dividing ratio in virtual container through adjustment chance bit, through first in first out (First In First Out; FIFO) smoothly just can obtain the tributary signal clock of up direction, with realize clock in the transmission course synchronously.
Wherein, adjustment chance bit can be positioned at the head of the message that stabs standing time, perhaps is arranged in the payload of the message of placing the branch service data.Wherein, The message that stab standing time can be specially real time transport protocol (Real-time Transfer Protocol; RTP), that promptly adjusts the chance bit can be positioned at the RTP header that stabs standing time, also can be placed on together in the payload (payload) of message with the branch service data.
The one PE equipment carries out buffer memory to each branch service payload and corresponding adjustment chance bit behind the adjustment chance bit of branch service payload that gets access to each branch road and branch service payload correspondence.Because the frame number of the branch service payload of in each grouping message, being adorned is predefined; And comprise an adjustment chance bit in per four frame branch service payloads usually; The quantity of the branch service payload of supposing to encapsulate in each grouping message is 24 frames; Then the branch service payload when buffer memory reaches 24 preset frames; After the number of adjustment chance bit reached preset 6, just 24 frame branch service payloads to buffer memory encapsulated with 6 corresponding adjustment chance bits, and the luggage bag of going forward side by side is handled.The branch service payload that is about to each branch road is encapsulated in the grouping message with the payload of its corresponding adjustment chance bit as message; Specifically distinguish each grouping message and belong to which branch service data through the index in the header; This grouping message can be CES Pseudo Wire Emulation Edge-to-Edge (Pseudo Wire Emulation Edge-to-Edge; PWE3) message is transferred to the 2nd PE equipment that is arranged in this synchronous ethernet network opposite side with the CES PWE3 message after the encapsulation through the synchronous ethernet network.
Present embodiment provides a kind of transmission method of synchronous service data; Through the branch service data of one or more branch roads are shone upon respectively; From each virtual container, extract the branch service payload adjustment chance bit corresponding with this branch service payload; With the difference timestamp of adjustment chance bit as tributary signal clock and system reference clock; And branch service payload and corresponding adjustment chance bit-envelope transmitted through packet network in the grouping message, realized the clock synchronization when business datum transmit in packet network, the defective of clock synchronization when having solved packet network in the prior art and can not realize that synchronous service data transmits; Make packet network can carry synchronous service, also can carry asynchronous service.
Fig. 6 is the flow chart of the transmission method embodiment three of synchronous service data of the present invention; As shown in Figure 6; Present embodiment provides a kind of transmission method of synchronous service data; Present embodiment describes with the transmission to synchronous service data of the up direction of transfer of data, and the data that PE equipment receives from CE equipment are the line activities data, and present embodiment can comprise the steps:
In the present embodiment; The one PE equipment can be the PE1 equipment that is positioned at synchronous ethernet one side among Fig. 3; The 2nd PE equipment can be for being positioned at the PE2 equipment of synchronous ethernet network opposite side; The business datum that the one PE equipment receives is the line activities data, and the line activities data in the present embodiment are for meeting STM or Synchronous Transport Signal (Synchronous Transport Signal, STS) STM-N of standard or STS-N signal.Line activities data in the present embodiment can be the line activities data of a circuit, also can be the line activities data of a plurality of circuits.The one PE equipment carries out deciding the frame processing to the STM-N or the STS-N signal in the line side of input, removes section overhead wherein, administrative unit (Administrative Unit, AU) frame after obtaining handling.Decide the process of frame processing and promptly from the line activities data, obtain frame head; Clock and the frame head that to decide the line activities data after frame is handled through the pointer adjustment are synchronized to respectively on system reference clock and the system side frame head; Promptly be synchronized on system reference clock and the system side frame head through the clock and the frame head of pointer adjustment with the line side; Make the AU frame after handling to adopt the system reference clock to regenerate, with the clock in elimination line side and the difference of system reference clock.
The one PE equipment is resolved the adjusted line activities data of pointer after the line activities data being carried out the pointer adjustment, obtains the branch service data in the adjusted AU frame of pointer.Be about to above-mentionedly peel off through expense in the pointer adjusted AU frame and pointer; Obtain the branch service data of one or more branch road with parsing; Carrying out follow-up mapping multiplexing process, the branch service data map of one or more branch roads is advanced among the SPE of VC or SONET of the SDH that produces by the TDM system clock.
Present embodiment provides a kind of transmission method of synchronous service data; Through the line activities data being carried out the pointer adjustment; With the clock synchronization of line activities data to the system reference clock; And resolve and obtain the one or more branch service data in the adjusted AU frame of pointer; One or more branch service data are mapped in the virtual container respectively, and from each virtual container, extract the branch service payload adjustment chance bit corresponding of the branch service data in this virtual container, with the difference timestamp of adjustment chance bit as tributary signal clock and system reference clock with this branch service payload; And the adjustment chance bit-envelope that a plurality of branch service payloads and each branch service payload is corresponding is in the grouping message; Transmit through packet network, realized the clock synchronization when business datum is transmitted in packet network, solved the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art; Realized that packet network can carry synchronous service, also can carry asynchronous service.
Fig. 7 is the flow chart of the transmission method embodiment four of synchronous service data of the present invention, and as shown in Figure 7, present embodiment provides a kind of transmission method of synchronous service data, and present embodiment can comprise the steps:
Step 703 recovers the branch service data according to the adjustment chance bit in the virtual container.
Present embodiment provides a kind of transmission method of synchronous service data; Handle the branch service payload and adjustment chance bit that extracts in the grouping message through unpacking; With the difference timestamp of said adjustment chance bit as tributary signal clock and system reference clock; The branch service payload mappings is advanced the branch service Frame; And according to adjustment chance bit the mapping of branch service Frame is multiplexed in the virtual container, recovering the branch service data according to adjustment chance bit again, present embodiment will be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock; Make clock synchronization when business datum is transmitted in packet network; Solved the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art, realized that packet network can carry synchronous service, also can carry asynchronous service.
Fig. 8 is the flow chart of the transmission method embodiment five of synchronous service data of the present invention; As shown in Figure 8; Present embodiment provides a kind of transmission method of synchronous service data; Present embodiment describes with the transmission to synchronous service data of the down direction of transfer of data, and the data that PE equipment receives from CE equipment are the branch service data, and present embodiment can comprise the steps:
Continuation is with reference to figure 3; PE equipment in the present embodiment can be the PE1 equipment that is positioned at synchronous ethernet network one side shown in Fig. 3; The 2nd PE equipment can be the PE2 equipment that is positioned at synchronous ethernet network opposite side shown in Fig. 3; When business datum is transmitted, be sent to the 2nd PE equipment from a PE equipment in the synchronous ethernet network.The 2nd PE equipment is behind the grouping message (for example the foregoing description two described CES PWE3 messages) that receives through the synchronous ethernet network from a PE equipment; The 2nd PE equipment carries out buffer memory to this grouping message; And flow carried out shaping, eliminate the shake that the synchronous ethernet network is brought.The 2nd PE equipment can also be monitored the order of this message that divides into groups; Adjust the order of out of order message; The message of packet loss is taked to mend bag measure etc.,, extract branch service payload and adjustment chance bit in the grouping message then to the processing of unpacking of this grouping message; For CES PWE3 message, the TDM branch service payload that is about in this message comes out with adjustment chance bit extraction.
The 2nd PE equipment extracts from the grouping message after TDM branch service payload and the adjustment chance bit; With the difference timestamp of adjustment chance bit as tributary signal clock and system reference clock; Be benchmark promptly with the system reference clock; Know branch service data shared frequency dividing ratio in virtual container through adjustment chance bit, smoothly just can obtain the tributary signal clock of down direction, make that the tributary signal clock that generates is identical with the tributary signal clock of up direction through FIFO; Make that the frequency of TDM service dispatching is consistent with the frequency that uplink service gets on the down direction, be implemented in the clock synchronization in the transmission course.After the 2nd PE equipment advances the branch service payload mappings in the branch service Frame, also the mapping of branch service Frame is multiplexed in the virtual container step 201 of concrete adaptation procedure in can similar the foregoing description according to adjustment chance bit.Virtual container in the present embodiment can be the VC of SDH, also can be the SPE of SONET.
Further, adjustment chance bit can be positioned at the head of the message that stabs standing time, perhaps is arranged in the payload of the message of placing the branch service data.Wherein, the message that stab standing time can be the RTP message, promptly adjusts the chance bit and can be positioned at the RTP header that stabs standing time, also can be placed on together in the payload (payload) of message with the branch service data.
The 2nd PE equipment according to adjustment chance bit and the overhead-bits among VC or the SPE, recovers out with the branch service signal among VC or the SPE after getting access to the VC or SPE of mapping after multiplexing.
Present embodiment provides a kind of transmission method of synchronous service data; Handle the branch service payload and adjustment chance bit that extracts in the grouping message through unpacking; Adjustment chance bit is as the difference timestamp of tributary signal clock and system reference clock; The branch service payload mappings is advanced in the branch service Frame; And according to adjustment chance bit the mapping of branch service Frame is multiplexed in the virtual container, recovering the branch service data according to adjustment chance bit again, present embodiment will be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock; Make clock synchronization when business datum is transmitted in packet network; Solved the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art, realized that packet network can carry synchronous service, also can carry asynchronous service.
Fig. 9 is the flow chart of the transmission method embodiment six of synchronous service data of the present invention; As shown in Figure 9; Present embodiment provides a kind of transmission method of synchronous service data; Present embodiment describes with the transmission to synchronous service data of the down direction of transfer of data, and the data that PE equipment receives from CE equipment are the line activities data, and present embodiment can comprise the steps:
The 2nd PE equipment is after getting access to the VC or SPE that carries the branch service data; Pointer according to the branch service data among system reference clock and system reference frame head generation VC or the SPE; And generation section overhead; The pointer of section overhead and generation is added among VC or the SPE, generate the line activities data with the branch service data and send, promptly form STM-N or the STS-N signal sends.
Present embodiment provides a kind of transmission method of synchronous service data; Handle the branch service payload and adjustment chance bit that extracts in the grouping message through unpacking; According to adjustment chance bit the branch service payload mappings is multiplexed in the virtual container; Recover the branch service data according to adjustment chance bit again, and, pointer and section overhead are added in the virtual container according to the pointer of the branch service data in system reference clock and the system reference frame head generation virtual container; Forming the line activities data with the branch service data sends; Present embodiment be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock, make clock synchronization when business datum is transmitted in packet network, solve the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art; Realized that packet network can carry synchronous service, also can carry asynchronous service.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Figure 10 is the structure chart of the transmitting device embodiment one of synchronous service data of the present invention; Shown in figure 10; Present embodiment provides a kind of transmitting device of synchronous service data, and this device can be carried out each step among the said method embodiment two, repeats no more here.Present embodiment describes with the transmission to synchronous service data of the up direction of transfer of data, and the data that PE equipment receives from CE equipment are the branch service data.The transmitting device of the synchronous service data that present embodiment provides can comprise mapping block 1001, extraction module 1002 and group bag module 1003.Wherein, mapping block 1001 is used for the branch service data of the one or more branch roads that receive are mapped to respectively and branch road corresponding virtual container.Extraction module 1002 be used for from each virtual container that mapping block 1001 generates extract branch service data this virtual container the branch service payload; And the corresponding adjustment chance bit of this branch service payload, with adjusting the chance bit as the tributary signal clock of the corresponding branch road of this virtual container and the difference timestamp of system reference clock.The branch service payload of each branch road that group bag module 1003 is used for extraction module 1002 is obtained and the adjustment chance bit-envelope of branch service payload correspondence are transmitted through packet network to the grouping message.
Further, adjustment chance bit can be positioned at stab standing time head, perhaps be arranged in the payload of the message of placing the branch service data.Wherein, the message that stab standing time can be the RTP message, and the placement location of promptly adjusting the chance bit can be positioned at the RTP header that stabs standing time, also can be placed on together in the payload (payload) of message with the branch service data.
Present embodiment provides a kind of transmitting device of synchronous service data; Through mapping block, extraction module and group bag module are set; The branch service data of one or more branch roads are mapped to respectively in the branch road corresponding virtual container; From each virtual container, extract the branch service payload adjustment chance bit corresponding with this branch service payload, with the tributary signal clock and the difference timestamp of system reference clock of adjustment chance bit as the corresponding branch road of this virtual container, and with the adjustment chance bit-envelope of a plurality of branch service payloads and correspondence in the grouping message; Transmit through packet network; Present embodiment be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock, make clock synchronization when business datum is transmitted in packet network, solve the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art; Realized that packet network can carry synchronous service, also can carry asynchronous service.
Figure 11 is the structure chart of the transmitting device embodiment two of synchronous service data of the present invention; Shown in figure 11; Present embodiment provides a kind of transmitting device of synchronous service data, and this device can be carried out each step among the said method embodiment three, repeats no more here.Present embodiment describes with the transmission to synchronous service data of the up direction of transfer of data, and the data that PE equipment receives from CE equipment are the line activities data.Present embodiment can also comprise synchronization module 1101 and parsing module 1102 on the basis of above-mentioned embodiment shown in Figure 10.Wherein, Synchronization module 1101 is used for that the line activities data of the one or more circuits that receive are carried out deciding frame to be handled, and clock and the frame head that will decide the line activities data after frame is handled through the pointer adjustment are synchronized to respectively on system reference clock and the system side frame head.Parsing module 1102 is used for the adjusted line activities data of pointer that synchronization module 1101 generates are resolved, and obtains the branch service data, and said branch service data are sent to mapping block 1001.
Present embodiment provides a kind of transmitting device of synchronous service data; Through mapping block, extraction module, group bag module and synchronization module and parsing module are set; The line activities data are carried out pointer adjustment, the clock synchronization of line activities data to the system reference clock, and is resolved and obtained the branch service data in the adjusted AU frame of pointer; Cross the branch service data are shone upon; And carry out adaptation processing by adjustment chance bit, with the difference timestamp of adjustment chance bit, and the adjustment chance bit of a plurality of branch service data and correspondence carried out buffer memory as tributary signal clock and system reference clock; Be encapsulated in the grouping message and transmit through packet network; Present embodiment be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock, make clock synchronization when business datum is transmitted in packet network, solve the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art; Realized that packet network can carry synchronous service, also can carry asynchronous service.
Figure 12 is the structure chart of the transmitting device embodiment three of synchronous service data of the present invention; Shown in figure 12; Present embodiment provides a kind of transmitting device of synchronous service data, and this device can be carried out each step among the said method embodiment five, repeats no more here.Present embodiment describes with the transmission to synchronous service data of the down direction of transfer of data, and the data that PE equipment receives from CE equipment are the branch service data.The transmitting device of the synchronous service data that present embodiment provides can comprise parse module 1201, become frame module 1202 to conciliate mapping block 1203.Wherein, parse module 1201 is used for the grouping message that receives is carried out buffer memory and unpacks processing, extracts branch service payload and adjustment chance bit in the grouping message.Become frame module 1202; The adjustment chance bit that is used for parse module 1201 is got access to is as the difference timestamp of tributary signal clock and system reference clock; The branch service payload mappings that parse module 1201 gets access to is advanced the branch service Frame, and the mapping of branch service Frame is multiplexed in the virtual container according to adjustment chance bit.Separating mapping block 1203 is used for recovering the branch service data according to the adjustment chance bit of the virtual container that becomes frame module 1202 to generate.
Further, adjustment chance bit can be positioned at the head of the message that stabs standing time, perhaps is arranged in the payload of the message of placing the branch service data.Wherein, the message that stab standing time can be the RTP message, and the placement location of promptly adjusting the chance bit can be positioned at the RTP header that stabs standing time, also can be placed on together in the payload (payload) of message with the branch service data.
Present embodiment provides a kind of transmitting device of synchronous service data; Through parse module being set, becoming frame module to conciliate mapping block; Handle the branch service payload and adjustment chance bit that extracts in the grouping message through unpacking; Adjustment chance bit is as the difference timestamp of tributary signal clock and system reference clock; And according to adjustment chance bit the mapping of branch service Frame is multiplexed in the virtual container, recovering the branch service data according to adjustment chance bit again, present embodiment will be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock; Make clock synchronization when business datum is transmitted in packet network; Solved the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art, realized that packet network can carry synchronous service, also can carry asynchronous service.
Figure 13 is the structure chart of the transmitting device embodiment four of synchronous service data of the present invention; Shown in figure 13; Present embodiment provides a kind of transmitting device of synchronous service data, and this device can be carried out each step among the said method embodiment six, repeats no more here.Present embodiment describes with the transmission to synchronous service data of the down direction of transfer of data, and the data that PE equipment receives from CE equipment are the line activities data.Present embodiment is on the basis of above-mentioned embodiment shown in Figure 12; Can also comprise adjusting module 1301; Adjusting module 1301 is used for generating the pointer to the branch service data of separating the virtual container that mapping block 1203 generates according to system reference clock and system reference frame head; Said pointer and section overhead are added in the said virtual container, and generate the line activities data with the branch service data and send.
Present embodiment provides a kind of transmitting device of synchronous service data; Through parse module being set, becoming frame module, separating mapping block and adjusting module; Handle the branch service payload and adjustment chance bit that extracts in the grouping message through unpacking; The branch service payload mappings is advanced in the branch service Frame, the mapping of branch service Frame is multiplexed in the virtual container, recover the branch service data according to adjustment chance bit again according to adjustment chance bit; Pointer according to the branch service data in system reference clock and the system reference frame head generation virtual container; Pointer and section overhead are added in the virtual container, form the line activities data with the branch service data and send, present embodiment will be through adjusting the difference timestamp of chance bit as tributary signal clock and system reference clock; Make clock synchronization when business datum is transmitted in packet network; Solved the defective of clock synchronization when packet network can not be realized the synchronous service data transmission in the prior art, realized that packet network can carry synchronous service, also can carry asynchronous service.
Figure 14 is the structure chart of the transmission system embodiment of synchronous service data of the present invention; Shown in figure 14; Present embodiment provides a kind of transmission system of synchronous service data; Can comprise customer edge devices (CE equipment) 1401 and provider edge equipment (PE equipment) 1402, concrete implementation is referring to above-mentioned network architecture diagram shown in Figure 3, wherein; PE equipment 1402 can comprise the transmitting device of above-mentioned Figure 10 or synchronous service data shown in Figure 11, and the transmitting device that comprises above-mentioned Figure 12 or synchronous service data shown in Figure 13.
What should explain at last is: above embodiment is only in order to explaining technical scheme of the present invention, but not to its restriction; Although with reference to previous embodiment the present invention has been carried out detailed explanation, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment put down in writing, and perhaps part technical characterictic wherein is equal to replacement; And these are revised or replacement, do not make the spirit and the scope of the essence disengaging various embodiments of the present invention technical scheme of relevant art scheme.
Claims (13)
1. the transmission method of a time division multiplexing tdm business datum is characterized in that, comprising:
With the branch service data of the one or more branch roads that receive be mapped to respectively with branch road corresponding virtual container in;
From each virtual container, extract the branch service payload and the corresponding adjustment chance bit of said branch service payload of the branch service data in this virtual container, with said adjustment chance bit as the tributary signal clock of the corresponding branch road of this virtual container and the difference timestamp of system reference clock;
The adjustment chance bit-envelope that the branch service payload of each branch road and said branch service payload is corresponding and is transmitted through synchronous ethernet in the grouping message.
2. the transmission method of TDM business datum according to claim 1 is characterized in that, the branch service data of said one or more branch roads that will receive be mapped to respectively with branch road corresponding virtual container in before, also comprise:
The line activities data of the one or more circuits that receive are carried out deciding frame handle, clock and the frame head that will decide the line activities data after frame is handled through the pointer adjustment are synchronized to respectively on system reference clock and the system side frame head;
The adjusted line activities data of pointer are resolved, obtain the branch service data;
Saidly decide frame and handle and promptly from the line activities data, to obtain frame head.
3. the transmission method of TDM business datum according to claim 1 is characterized in that, said adjustment chance bit is positioned at the head of the message that stabs standing time, perhaps is arranged in the payload of the message of placing said branch service data.
4. the transmission method of a time division multiplexing tdm business datum is characterized in that, comprising:
To carry out buffer memory through the grouping message that the synchronous ethernet transmission receives and unpack processing, extract branch service payload and adjustment chance bit in the said grouping message;
With the difference timestamp of said adjustment chance bit as tributary signal clock and system reference clock; Said branch service payload mappings is advanced the branch service Frame, and said branch service Frame mapping is multiplexed in the virtual container according to said adjustment chance bit;
Adjustment chance bit according in the said virtual container recovers the branch service data.
5. the transmission method of TDM business datum according to claim 4 is characterized in that, said recover the branch service data according to the adjustment chance bit in the said virtual container after, also comprise:
Generate the pointer of the branch service data in the said virtual container according to system reference clock and system reference frame head, said pointer and section overhead are added in the said virtual container, generate the line activities data and send.
6. the transmission method of TDM business datum according to claim 4 is characterized in that, said adjustment chance bit is positioned at the head of the message that stabs standing time, perhaps is arranged in the payload of the message of placing said branch service data.
7. the transmitting device of a time division multiplexing tdm business datum is characterized in that, comprising:
Mapping block is used for the branch service data of the one or more branch roads that receive are mapped to respectively and branch road corresponding virtual container;
Extraction module; Be used for extracting the branch service payload and the corresponding adjustment chance bit of said branch service payload of the branch service data this virtual container from each virtual container that said mapping block generates, with said adjustment chance bit as the tributary signal clock of the corresponding branch road of this virtual container and the difference timestamp of system reference clock;
Group bag module, the corresponding adjustment chance bit-envelope of the branch service payload of each branch road that is used for said extraction module is obtained and said branch service payload be to the grouping message, and transmit through synchronous ethernet.
8. the transmitting device of TDM business datum according to claim 7 is characterized in that, also comprises:
Synchronization module; The line activities data of the one or more circuits that are used for receiving are carried out deciding frame and are handled; Clock and the frame head that to decide the line activities data after frame is handled through pointer adjustment are synchronized to respectively on system reference clock and the system side frame head, saidly decide the frame processing and promptly from the line activities data, obtain frame head;
Parsing module is used for the adjusted line activities data of pointer that said synchronization module generates are resolved, and obtains the branch service data, and said branch service data are sent to said mapping block.
9. the transmitting device of TDM business datum according to claim 7 is characterized in that, said adjustment chance bit is positioned at the head of the message that stabs standing time, perhaps is arranged in the payload of the message of placing said branch service data.
10. the transmitting device of a time division multiplexing tdm business datum is characterized in that, comprising:
Parse module is used for the grouping message that receives through the synchronous ethernet transmission is carried out buffer memory and unpacks processing, extracts branch service payload and adjustment chance bit in the said grouping message;
Become frame module; The said adjustment chance bit that is used for said parse module is got access to is as the difference timestamp of tributary signal clock and system reference clock; The said branch service payload mappings that said parse module gets access to is advanced the branch service Frame, and said branch service Frame mapping is multiplexed in the virtual container according to said adjustment chance bit;
Separate mapping block, the adjustment chance bit of the said virtual container that is used for generating according to said one-tenth frame module recovers the branch service data.
11. the transmitting device of TDM business datum according to claim 10 is characterized in that, also comprises:
Adjusting module; Be used for generating the said pointer of separating the branch service data of the said virtual container that mapping block generates according to system reference clock and system reference frame head; Said pointer and section overhead are added in the said virtual container, generate the line activities data and send.
12. the transmitting device of TDM business datum according to claim 10 is characterized in that, said adjustment chance bit is positioned at the head of the message that stabs standing time, perhaps is arranged in the payload of the message of placing said branch service data.
13. the transmission system of a time division multiplexing tdm business datum; It is characterized in that; Comprise customer edge devices and provider edge equipment, said provider edge equipment comprises the transmitting device of each described TDM business datum of claim 7-9 and the transmitting device of each described TDM business datum of claim 10-12.
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| CN101917340A (en) * | 2010-08-18 | 2010-12-15 | 中兴通讯股份有限公司 | Pseudo-wire emulation edge to edge (PWE3) downlink framing method and device for asynchronous transfer mode (ATM) service |
| CN102655469B (en) * | 2011-03-01 | 2016-08-10 | 中兴通讯股份有限公司 | A kind of network equipment realizing differential clock equipment communication and system and method |
| CN102497311B (en) * | 2011-12-06 | 2016-08-31 | 华为技术有限公司 | The method of transmission/receiver section expense, device and transmission system in SDH/SONET circuit simulation |
| CN105933087B (en) * | 2016-04-18 | 2018-07-31 | 华为技术有限公司 | Method, relevant device and the system of data processing in a kind of Ethernet |
| WO2019071369A1 (en) | 2017-10-09 | 2019-04-18 | 华为技术有限公司 | Data transmission method in optical network and optical network device |
| CN108365886B (en) * | 2018-02-13 | 2020-07-14 | 北京空间飞行器总体设计部 | Time division multiplexing inter-satellite network data storing and forwarding method |
| CN110311746B (en) * | 2019-06-19 | 2020-11-27 | 北京恒光信息技术股份有限公司 | Low-order virtual cascade alignment method and device |
| CN111162964B (en) * | 2019-12-17 | 2021-10-12 | 山东鲁软数字科技有限公司智慧能源分公司 | Intelligent station message integrity analysis method and system |
| CN113342880A (en) * | 2021-07-06 | 2021-09-03 | 云南中烟工业有限责任公司 | Method and device for acquiring metadata in tobacco data |
| CN115811388A (en) * | 2021-09-13 | 2023-03-17 | 华为技术有限公司 | Communication method, related device and storage medium |
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| CN1204906A (en) * | 1997-05-09 | 1999-01-13 | 阿尔卡塔尔-阿尔斯托姆通用电气公司 | Apparatus for reducing jitter in asynchronous apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1204906A (en) * | 1997-05-09 | 1999-01-13 | 阿尔卡塔尔-阿尔斯托姆通用电气公司 | Apparatus for reducing jitter in asynchronous apparatus |
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