CN101729940B - Method for sending data to multiple communication channels and method for receiving data - Google Patents

Abstract

The invention provides a method and a device for sending data to multiple communication channels. The method comprises the following steps of: according to a split granularity no less than the number of bytes of a frame alignment indicating field FAS, evenly splitting each data frame of the data into an integral number of data blocks; regularly distributing the data blocks of the data to the multiple communication channels so as to make the data blocks, containing the frame alignment information of the data frames, regularly appeared on the multiple communication channels; and sending the data blocks of the data by the multiple communication channels. Correspondingly, the invention also provides a method and a device for receiving the data, and a method and a system used in the multiple communication channels to send the data. By the devices and the methods, a receiving end can recover the data sent by the sending end according to the data blocks containing the frame alignment information of the data frames, and the OTUk signal can be transmitted at a long distance by a 10G wave division transmission system of the conventional optical transmission network and can also be transmitted in at a short distance at low cost by 100G and 40G Ethernet transmission systems.

Description

Send the method for data and the method for receive data to multiple communication channels

Technical field

The present invention relates to communication technical field, relate in particular in optical-fiber network to multiple communication channels send the method for data and device, from the method for multiple communication channels receive data and device, and be used for the method and system that multiple communication channels transmits data.

Background technology

In optical transfer network (OTN:Optical Transport Network), defined the message structure on light transmission communication port, be called as optical transport unit (OTUk:Optical Channel Transport Unit).

Fig. 1 is the data frame structure of existing optical transport unit.Referring to Fig. 1, first 14 bytes are the overhead area of OTUk, wherein, comprise the frame alignment indication field (FAS:Frame Alignment Signal) of 6 bytes and the multiframe alignment indication field (MFAS:MultiFrame Alignment Signal) of 1 byte; And other overhead byte, the specifically section of comprising monitoring byte (SM:Section Monitoring), all purpose communication path byte (GCC0:General Communication Channel) and two reserve bytes (Res:Reserved).

The transmission of optical transport unit rule is to transmit line by line, and the higher bit position of byte first passes.Frame one frame connects a frame and transmits, and the MFAS byte in frame overhead circulates frame by frame from 0-255 and increases progressively, and the cycle is 256.The OTN interface rate that transmits optical transport unit in present transmission network be divided into several ranks: OTU1 approximate 2.5G (gigabit/sec, Gbit/s); OTU2 approximates 10G; OTU3 approximates 40G; The OTU4 of new definition approximates 112G.Their data frame structure is consistent, and speed is increasing.

The implementation that the 100GE (interface rate is the Ethernet of 100 gigabit/sec) that defines at present and 40GE mainly consider inverse multiplexing.Mainly contain the transmission that following specification: 10x10G and 4x25G realize 100GE; 4x10G realizes the transmission of 40GE.Inverse multiplexing refers to a kind of source high-speed data is split parallel convey on some low speed passages, then makes up recovery at receiving terminal, restores the load mode of high-speed data.100GE has been adopted the unified shader that carries out 20 passage inverse multiplexings.The data of 20 passages are multiplexed on 10x10G, 4x25G optical module according to bit mapping again to be transmitted.40GE has been adopted the unified shader of 4 passage inverse multiplexings.

In existing optical transfer network, the (k=3 with OTUk is arranged, 4) the Frame data block that splits into 16 bytes or 8 bytes is distributed on multiple communication channels, and use OTUk (k=3,4) last byte of the reserve bytes in frame overhead or FAS is carried the passage number, realizes the transmission of OTUk on 40GE or 100GE optical module.Receiving terminal carries out the border framing according to FAS on each passage, and according to FAS and MFAS border framing execution delay compensation alignment, then according to the passage number identification passage that carries, thereby carries out data combination recovery.

Yet, analyze discovery through the inventor, the reserve bytes that the method is used or last byte of FAS are carried the channel number code labeling, can make the data integrity of primary signal lose.Especially, in current network, to such reserve bytes, there is different application in different manufacturers, so there is compatibility issue in the method.And adopt last byte of FAS to carry, also can cause the deteriorated of framing performance.

In addition, the light WDM technology of 10G (WDM:Wavelength Division Multiplexer) transmission system is universal, and the 40G transmission system is realizing commercial gradually.Impact due to the key factor that is subject to optical fiber dispersion and the restriction communication speed such as non-linear and distance, some existing fiber optic transmission system is the transmitting high speed data signal directly, for example the wave transmission system of former 10G can not be supported the transmission of 40G, and perhaps some 40G system that has disposed can not support the transmission of the OTU4 of 112G.In addition, customer data signal transport service (as 40GE and 100GE customer data signal) at a high speed needs to consider to there is no at present in the upper transmission of existing network (for example WDM transmission system of 10G) scheme that OTU3, OTU4 data-signal are directly transmitted on the WDM of 10G transmission system.

Summary of the invention

The embodiment of the present invention provides a kind of method to multiple communication channels transmission data and device, a kind of method and device from the multiple communication channels receive data, reaches a kind of method and system that transmit data for multiple communication channels, make it possible to realize that by the inverse multiplexing technology OTUk signal transmits in existing optical transport network, and avoided receiving terminal carrying out data when recovering, the framing performance degradation of data or affect the problem of data integrity.

The embodiment of the present invention provides a kind of method that sends data to multiple communication channels, and these data are comprised of a plurality of optical transport unit Frames, and the method comprises:

According to splitting granularity, each Frames of data evenly is split as integer number of data blocks, this fractionation granularity is not less than the byte number of frame alignment indication field FAS;

The data block of data is distributed on multiple communication channels regularly, appears at regularly on multiple communication channels so that the data block of the frame alligning information that includes Frame in the data block of data is;

Send the data block of data by this multiple communication channels.

The embodiment of the present invention also provides a kind of device that sends data to multiple communication channels, and this device comprises:

Split module, be used for according to splitting granularity, each optical transport unit Frames of data evenly is split as integer number of data blocks, this fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Distribution module, be used for according to the order of these data blocks in data, be distributed to successively the data block after splitting on multiple communication channels, appear on multiple communication channels so that the data block of the frame alligning information that includes Frame in these data blocks is regularly, and send the data block of data by this multiple communication channels.

The embodiment of the present invention also provides a kind of device that sends data to multiple communication channels, and this device comprises:

Split module, be used for according to splitting granularity, each optical transport unit Frames of data evenly is split as integer number of data blocks, described fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Distribution module is used for according to the order of these data blocks in data, and the data block after splitting is distributed on described multiple communication channels successively;

The second adjusting module, be used for recovering requirement according to inverse multiplexing, adjust the position of these data blocks on described multiple communication channels, appear on multiple communication channels so that the data block of the frame alligning information that includes Frame in these data blocks is regularly, and the data block after adjusting sends by this multiple communication channels.

The embodiment of the present invention also provides a kind of method from the multiple communication channels receive data, and for the data that the method to multiple communication channels transmission data that receives the embodiment of the present invention sends, the method comprises:

The data that reception is comprised of data block, and according to the data block of the frame alligning information that includes Frame of these data, recover described data.

Correspondingly, the embodiment of the present invention also provides a kind of device from the multiple communication channels receive data, and for the data that the device to multiple communication channels transmission data that receives the embodiment of the present invention sends, this device comprises:

Data recovery module is used for the data block according to the frame alligning information that includes Frame of described data, recovers described data.

The embodiment of the present invention also provides a kind of system that transmits data for multiple communication channels, this system comprises: send the device of data and from the device of multiple communication channels receive data to multiple communication channels, wherein, send the device of data to multiple communication channels, comprising:

Split module, be used for according to splitting granularity, each optical transport unit Frames of data evenly is split as integer number of data blocks, this fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Distribution module, be used for according to the order of these data blocks in data, be distributed to successively the data block after splitting on multiple communication channels, appear on multiple communication channels so that the data block of the frame alligning information that includes Frame in these data blocks is regularly, and send the data block of data by this multiple communication channels;

From the device of multiple communication channels receive data, for the data that the device to multiple communication channels transmission data that receives the embodiment of the present invention sends, this device comprises:

Data recovery module is used for the data block according to the frame alligning information that includes Frame of these data, recovers data.

The embodiment of the present invention also provides a kind of system that transmits data for multiple communication channels, this system comprises: send the device of data and from the device of multiple communication channels receive data to multiple communication channels, wherein, send the device of data to multiple communication channels, comprising:

Split module, be used for according to splitting granularity, each optical transport unit Frames of data evenly is split as integer number of data blocks, this fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Distribution module is used for according to the order of data block in data, is distributed to successively the data block after splitting on multiple communication channels;

The second adjusting module, be used for recovering requirement according to inverse multiplexing, the position of adjustment data block on multiple communication channels, appear on multiple communication channels so that the data block of the frame alligning information that includes Frame in these data blocks is regularly, and the data block after adjusting sends by this multiple communication channels.

From the device of multiple communication channels receive data, for the data that the device to multiple communication channels transmission data that receives the embodiment of the present invention sends, this device comprises:

Data recovery module is used for the data block according to the frame alligning information that includes Frame of described data, recovers described data.

The embodiment of the present invention also provides a kind of method that transmits data for multiple communication channels, and these data are comprised of a plurality of optical transport unit Frames, and the method comprises:

Transmitting terminal is according to splitting granularity, and each Frames of data evenly is split as integer number of data blocks, and this fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Transmitting terminal is distributed to the data block of data on multiple communication channels regularly, appears at regularly on multiple communication channels so that the data block of the frame alligning information that includes Frame in the data block of data is; And send the data block of data by this multiple communication channels;

Receiving terminal receives the data that are comprised of data block, and according to the data block of the frame alligning information that includes Frame of these data, recovers data.

Implement the embodiment of the present invention, have following beneficial effect:

The embodiment of the present invention splits into by each the optical transport unit Frame with data the data block that integer is individual, the fractionation granularity is not less than frame alignment indication field FAS byte number, and the data block of data is distributed on multiple communication channels regularly transmits, make the receiving terminal can be according to the data block of the frame alligning information that includes Frame, recover the data that transmitting terminal sends, and when recovering, the framing performance of data is excellent, has also guaranteed the integrality of data.

The embodiment of the present invention can be on the basis that does not affect existing optical transport network and OTU signal structure, make the OTU3 signal can adopt the 40GE optical module of 4x10G to transmit, the scale of this optical module is used the cost that will reduce with respect to present traditional 40G optical module; Also make the OTU4 signal can adopt the 100GE optical module of 10x10G and 4x25G to transmit, the scale of this optical module is used will further reduce itself relatively low cost.

And, the embodiment of the present invention is on the basis that does not affect existing optical transport network and OTU signal structure, also make OTU3 signal, OTU4 signal to realize long-distance transmissions on present 10GWDM transmission system, the OTU2 signal is transmitted on original 2.5G WDM transmission system.

Description of drawings

Fig. 1 is the data frame structure of existing optical transport unit;

Fig. 2 is the system configuration schematic diagram that multiple communication channels transmits data that is used for of first embodiment of the invention;

Fig. 3 is the apparatus structure schematic diagram to multiple communication channels transmission data of second embodiment of the invention;

Fig. 4 is the apparatus structure schematic diagram to multiple communication channels transmission data of third embodiment of the invention;

Fig. 5 is the apparatus structure schematic diagram from the multiple communication channels receive data of fourth embodiment of the invention;

Fig. 6 is the Data Division schematic diagram of the embodiment of the present invention;

Fig. 7 is the schematic diagram that is distributed to after Data Division in Fig. 6 on multiple communication channels;

Fig. 8 is the schematic diagram that the device of the transmission data of the embodiment of the present invention adopts the first adjustment mode to adjust;

Fig. 9 is that the device of the transmission data of the embodiment of the present invention adopts the second adjustment mode to adjust and the schematic diagram for adjusting before splitting;

Figure 10 is that the device of the transmission data of the embodiment of the present invention adopts the 3rd adjustment mode to adjust and the schematic diagram for adjusting after distribution;

Figure 11 is the schematic diagram that the device of the transmission data of the embodiment of the present invention adopts the 4th adjustment mode to adjust;

Figure 12 is that the device of the transmission data of the embodiment of the present invention adopts the lead-in position view after the 5th adjustment mode is adjusted;

Figure 13 is the structural representation of trapping module in the device of receive data of fifth embodiment of the invention;

Figure 14 is the structural representation of trapping module in the device of receive data of sixth embodiment of the invention;

Figure 15 is the process schematic diagram of device obtaining communication passage relative numbering of the receive data of the embodiment of the present invention;

Figure 16 is the method flow schematic diagram to multiple communication channels transmission data of seventh embodiment of the invention;

Figure 17 is the method flow schematic diagram to multiple communication channels transmission data of eighth embodiment of the invention;

Figure 18 is the method flow schematic diagram to multiple communication channels transmission data of ninth embodiment of the invention;

Figure 19 is the method flow schematic diagram from the multiple communication channels receive data of tenth embodiment of the invention;

Figure 20 is the method flow schematic diagram that multiple communication channels transmits data that is used for of eleventh embodiment of the invention.

Embodiment

The present invention is described in further detail below in conjunction with accompanying drawing.

Fig. 2 is the system configuration schematic diagram that multiple communication channels transmits data that is used for of first embodiment of the invention.The data of the embodiment of the present invention are comprised of a plurality of optical transport unit Frames.Referring to Fig. 2, this system comprises to multiple communication channels and sends the device 1 of data and from the device 2 of multiple communication channels receive data.

Send the device 1 of data to multiple communication channels, be used for each optical transport unit Frame of data evenly is split as the data block that integer is individual, size is not less than frame alignment indication field FAS, and be distributed to regularly the data block of data on multiple communication channels, appear at regularly on multiple communication channels so that the data block of the frame alligning information that includes Frame in these data blocks is, then by this multiple communication channels, the data block of data is sent to device 2 from the multiple communication channels receive data

Data sink 2, the data that formed by data block that be used for to receive send that the device 1 of data sends, and according to the data block of the frame alligning information that includes Frame of these data, recover data.

Fig. 3 is the apparatus structure schematic diagram to multiple communication channels transmission data of second embodiment of the invention.Referring to Fig. 3, the transmission data set 1 of the embodiment of the present invention comprises: split module 10, be used for according to splitting granularity, each the optical transport unit Frame in data evenly being split as integer number of data blocks; With distribution module 12, be used for according to the order of these data blocks in data, data block after splitting is distributed on multiple communication channels 14 (00,01 00,01) successively, appear on multiple communication channels so that the data block of the frame alligning information that includes Frame in these data blocks is regularly, and send the data block of data by this multiple communication channels.The fractionation module 10 of the present embodiment and distribution module 12 can be configured to a module.

Usually, in the OTUk Frame, the expense of first 7 bytes is: the FAS of 6 bytes and 1 byte MFAS.According to the method described above, require the data block size (be called and split granularity) of fractionation to be at least 6 bytes.After Frame was split into data block according to the fractionation granularity, first data block (lead-in) of every frame was the data block that includes the frame alligning information of Frame.The frame alligning information of Frame refers to FAS, perhaps, and FAS and MFAS.

In the embodiment of the present invention, the optical transport unit Frame is carried out whole epigranular split, namely, according to splitting granularity, a Frame just can be split as integer number of data blocks, can not need like this each data block is carried out mark.Like this, during reception, can determine thereafter data block according to first data block that includes the frame alligning information of Frame of Frame.

Table 1 has been listed the optional granularity that splits of part in the embodiment of the present invention, reaches a frame OTUk Frame and is split rear available data block number.Table 1 has also reflected the situation that rear data block cycle balance is distributed to 4 road communication ports, 16 road communication ports, 10 road communication ports, 20 road communication ports that splits.Part can evenly be distributed, and part is distributed to the some data blocks that also remain after each road communication port less than port number.Remaining data block number has special meaning, is called lead-in channel skip span, comes mark with R.Wherein, in table 1, A is byte number or the bit number of a frame OTUk; The data block number that X comprises for every frame after dividing; B is for splitting granularity byte number or bit number, and minimum value is not less than 6 bytes (every byte 8 bits); M is the port number of the multiple communication channels of employing, and in the embodiment of the present invention, the M value is greater than the 1 multiframe alignment indication periodic quantity 256 less than or equal to OTUk.

The optional fractionation granularity of table 1 and the distribution situation on the part multiple communication channels

Fig. 4 is the apparatus structure schematic diagram to multiple communication channels transmission data of third embodiment of the invention.Referring to Fig. 4, the device 1 of the transmission data of the embodiment of the present invention comprises: the first adjusting module 13, fractionation module 10, distribution module 12, the second adjusting module 14 and memory module 16.The below describes each module of embodiment of the present invention device in detail.

The first adjusting module 13 is used for recovering requirement according to splitting granularity and inverse multiplexing, include the word and other word switch of this Frame of the frame alligning information of Frame in the Frame with data, and the data after adjusting sends fractionation module 10 to.In the embodiment of the present invention, include the word of frame alligning information of Frame and the byte number of other words and equal to split granularity.

Alternatively, this first adjusting module 13 comprises: first adjusts control module 131, is used for according to the port number that splits granularity and multiple communication channels, judges whether to satisfy inverse multiplexing and recovers requirement; With the first adjustment processing module 132, be used for when being judged as YES, recover requirement according to splitting granularity and inverse multiplexing, include the word of frame alligning information of Frame and other word switch of this Frame in Frame with data, and the data after adjusting send fractionation module 10 to, when being judged as NO, directly data being sent to and split module 10.

The fractionation granularity of the embodiment of the present invention arranges as required, can be also to pre-set, and is stored in memory module 16.Memory module 16 also is used for the storage inverse multiplexing and recovers requirement.This inverse multiplexing recovers to require to be specially:

Take the port number of described multiple communication channels 14 as the cycle, within this cycle, all be distributed a word that includes the frame alligning information of Frame on multiple communication channels 14; Perhaps,

With the port number greater than multiple communication channels 14, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the word of the frame alligning information that includes Frame on multiple communication channels 14.

Split module 10, be used for according to splitting granularity, each optical transport unit Frames of data evenly is split as integer number of data blocks; With distribution module 12, be used for according to the order of these data blocks in data, the data block after splitting is distributed on multiple communication channels 14 (00,01 00,01) successively.

In the embodiment of the present invention, if the first adjusting module 13 recovers to require data were carried out adjustment according to inverse multiplexing, so, be distributed on multiple communication channels 14 data block through distribution module 12, its data block that includes the frame alligning information of Frame will be and appear at regularly on multiple communication channels 14.At this moment, the data block of data sends by multiple communication channels 14.

If the first adjusting module 13 does not have the adjustment of executing data, and distribution module 12 is distributed to the data block on multiple communication channels, and its data block that includes the frame alligning information of Frame does not also satisfy the condition that appears at regularly on multiple communication channels that is.Need so 15 pairs of data blocks that are distributed on multiple communication channels 14 of the second adjusting module to adjust.

The second adjusting module 15, be used for recovering requirement according to inverse multiplexing, the position of adjustment data block on multiple communication channels, appear at regularly on described multiple communication channels so that the data block of the frame alligning information that includes Frame in data block is, and the data block after adjusting sends by multiple communication channels 14.

Alternatively, the second adjusting module 15 comprises: second adjusts control module 151 and second adjusts processing module 152.Wherein, second adjusts control module 151, is used for judging that distribution module 12 is distributed to the data block on multiple communication channels 14, whether satisfies inverse multiplexing and recovers requirement; Second adjusts processing module 152, be used for when being judged as when not satisfying, recover requirement according to inverse multiplexing, adjust data block position of 14 on multiple communication channels, and the data block after adjusting sends by multiple communication channels 14, when being judged as when satisfying, do not carry out adjustment, directly data block is sent by multiple communication channels 14.Wherein, memory module 16 is used for this inverse multiplexing of storage and recovers requirement.This inverse multiplexing recovers to require to be specially:

Take the port number of multiple communication channels 14 as the cycle, within this cycle, all be distributed a data block that includes the frame alligning information of Frame on multiple communication channels 14; Perhaps,

With the port number greater than multiple communication channels 14, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the data block of the frame alligning information that includes Frame on multiple communication channels 14.

Need to prove, in the embodiment of the present invention, the first adjusting module 13, the second adjusting module 15 in the device 1 of transmission data are optional module, can two modules not arrange, and can be also that one of them in two modules is set, can also two modules all arrange.When in the device 1 that sends data, two modules all arranged, if the first adjusting module 13 was carried out adjustment to data before Data Division, the second adjusting module 15 was no longer carried out adjustment so, and data block is passed this second adjusting module 15 and is sent out away.Same, if data do not need to adjust, the adjusting module 13 and 15 that sends so in the device 1 of data is not carried out adjustment, and data are directly passed from adjusting module 13 and 15, are left intact.

Need to prove, the multiple communication channels 14 of embodiment of the present invention indication comprises two kinds of passage and channels.Particularly, the device 1 interior multiple communication channels that sends data is passage, and data block is transmitted on multiple communication channels afterwards by the second adjusting module 15, claims in channel.If data are adjusted before splitting, send in the device 1 of data the second adjusting module 15 is not set, distribution module 12 is distributed to data block on multiple communication channels for directly in channel so.In the embodiment of the present invention, the channel number of channel and passage is consistent.

Fig. 5 is the structural representation of device of the receive data of fourth embodiment of the invention.Referring to Fig. 5, in the embodiment of the present invention, the device of receive data 2 is used for the data that are comprised of data block that receive from multiple communication channels that the device 1 that sends data sends.The device 2 of this receive data comprises data recovery module 20, is used for the data block according to the frame alligning information that includes Frame of described data, recovers described data.

Further, data recovery module 20 comprises that trapping module 22, communication port order rearrangement module 23, delay compensation module 24 and combination recover module 26.Wherein:

Trapping module 22 is used for the frame alligning information of the Frame that the capture-data piece carries, and according to the FAS field of catching or MFAS field value specified data piece the orbution on multiple communication channels in receiving terminal.

In the embodiment of the present invention, this frame alligning information is specially frame alignment indication FAS field, perhaps, and frame alignment indication FAS field and multiframe alignment indication field MFAS.22 pairs of each road communication ports of trapping module carry out data-frame sync based on the FAS field, thereby determine the border of initial data frame and the border of the data block after fractionation.

Trapping module 22 set up according to the FAS field synchronous after, catch the MFAS field value after the FAS field.Then trapping module 22 is determined the channel number of multiple communication channels in the device 2 of receive data according to the absolute corresponding relation of the channel number of the multiple communication channels of transmitting terminal and MFAS value, its channel number with the multiple communication channels of transmitting terminal is corresponding one by one, thereby determines the orbution of data block on multiple communication channels.

Perhaps, trapping module 22 set up according to the FAS field synchronous after, catch the MFAS field value after the FAS field.There is the consistent relation that increases progressively in this MFAS field value with the channel number of the communication port that this MFAS field occurs, then trapping module 22 is according to itself increasing order and the above-mentioned consistent relation that increases progressively of MFAS field, determine the relative channel number of multiple communication channels in the device 2 of receive data (namely, according to the MFAS value distribution circular order relation of each road communication port of transmitting terminal as can be known), thus determine the orbution of data block on multiple communication channels.In the embodiment of the present invention, the major way of determining the relative channel number of multiple communication channels according to the MFAS value is: the channel number of specifying the arbitrary communication port in current multiple communication channels is 00, catch the MFAS numerical value on this road communication port, then according to the relation of the MFAS numerical value of catching on the MFAS value of catching on other each road communication ports and this designated communication passage, determine that each road communication port is with respect to the channel number of this designated communication passage.

Perhaps, if the maximum differential transfer of receiving terminal compensation postponed less than 1/2 of a Frame transmission time, the order that trapping module 22 occurs on each road communication port of receiving terminal according to the FAS field of catching, determine the relative channel number of multiple communication channels, thus the orbution of specified data piece on multiple communication channels.

In the embodiment of the present invention, the major way of determining the relative channel number of multiple communication channels according to the FAS field is: when catching FAS, the channel number of specifying current road the communication port of FAS field to occur is 00, the channel number of the communication port of FAS field to occur be 01 on next road, by that analogy, until the FAS field appears in each road communication port of multiple communication channels, channel number finishes.

In the embodiment of the present invention, trapping module 22 also provides the control reference information to other modules, comprising: differential delay compensation of phase information, channel number information, frame head indication information etc.

Communication port order rearrangement module 23 is used for the channel number of each communication port definite according to trapping module 22 multiple communication channels is reset.In the embodiment of the present invention, each road communication port works alone, thereby receiving terminal need to be recognized the distribution circular order of each road communication port and recovers former data.Especially, for the optical module of 100GE and 40GE, after transmitting, the order of each paths is random disorder, needs through resetting.

Delay compensation module 24 is used for according to the differential delay compensation of phase information from trapping module 22 transmissions, and the control delay compensation circuit is realized the differential transfer delay compensation alignment of multiple communication channels.Existing techniques in realizing is adopted in the differential delay compensation of the embodiment of the present invention, does not here carefully state.

If communication port order rearrangement module 23 is not set in the device of receive data 2, combination recovers module 26 so, be used for frame head indication information (comprising the boundary information of Frame and the boundary information of data block), the orbution of data block on multiple communication channels according to trapping module 22 transmission, recover data.

If be provided with communication port order rearrangement module 23 in the device of receive data 2, that combination recovers module 26, obtain data block for the multiple communication channels 14 after rearrangement, and according to the frame head indication information (comprising the boundary information of Frame and the boundary information of data block) that trapping module 22 transmits, recover data.

If data were carried out adjustment before sending to multiple communication channels.The device 2 of the receive data of the embodiment of the present invention also comprises further adjusts recovery module 25, is connected with combination recovery module 26, is used for the data after combination are carried out with transmitter side adjusting corresponding anti-adjustment control, thereby recovers initial data.

Alternatively, the device 2 of receive data can be combined in data block and recover to carry out anti-the adjustment before module 26 combinations, at this moment, adjust recovery module 25 and be used for the data block after delay compensation is carried out the anti-adjustment control corresponding with the transmitter side adjustment, then data block is sent to combination and recover module.Should instead adjust the mode of controlling can be pre-configured.

Need to prove, in the embodiment of the present invention, communication port order rearrangement module 23 can exchange with the position of differential delay compensating module 24, and position does not both affect the data of receiver side and recovers.In addition, communication port order rearrangement module 23 and adjustment recovery module 25 can also be integrated into a module, and at this moment, this integration module is connected with differential delay compensating module 24 with trapping module 22 respectively.

In the embodiment of the present invention, the device 1 that sends data becomes data block with Data Division, order according to data block in data, after being distributed to successively data block on multiple communication channels, whether the data block that judgement is distributed on multiple communication channels satisfies inverse multiplexing recovery requirement, if do not satisfy, according to the inverse multiplexing requirement, adjust the position of data block on multiple communication channels; If satisfy, do not carry out adjustment.The below is described in detail with example.

One, inverse multiplexing recover to require as take the port number of multiple communication channels as the cycle, and in this cycle, multiple communication channels is distributed a data block (lead-in) that includes the frame alligning information of Frame.

(1) do not need to adjust the position of data block on multiple communication channels

In the present embodiment, the device 1 that sends data splits data take granularity as 64 bytes, and 4 road communication ports are distributed.Fig. 6 is the Data Division schematic diagram of the embodiment of the present invention.Fig. 7 is the schematic diagram that is distributed to after Data Division in Fig. 6 on multiple communication channels.Wherein, the data block of a Frame by word1, word2 ..., word255 represents.Referring to Fig. 6 and Fig. 7, lead-in occurred on different communication ports take the cycle as 4 (identical from port number), but the phase relation of data block on each road communication port of this kind distribution mark, thus facilitate the data of receiving terminal to recover.

In the embodiment of the present invention, the inverse multiplexing port number of the fractionation of Frame and employing meets following relation:

MOD{A, (M * B) }=B or $\frac{\mathrm{MOD}\{A,(M\×B)\}}{B}=1$ Formula (1.1)

MOD{A, (M * B) }=R * B or $\frac{\mathrm{MOD}\{A,(M\×B)\}}{B}=R$ Formula (1.2)

Wherein: MOD is complementation; R represents lead-in channel skip span, be less than M and and M there is no the natural number of common divisor; A is the byte number of the every frame of OTUk; The granule number that X comprises for every frame after splitting; B is for splitting the granularity byte number, and minimum value is greater than 6 bytes; M is the port number of multiple communication channels, and value is less than or equal to 256 greater than 1.

Wherein, B=64, M=4,16 in table 1; B=192, M=4,16; B=320, M=4,16,10,20; B=960, M=4,16,10,20; B=1088, M=4,16; B=3264, M=4,16; B=5440, M=4,16,10,20; B=16320, in M=4,16,10,20 situation, data can not adjusted.

For data take granularity as 64 bytes split, 4 road communication ports are distributed situation, the device 2 of the receive data of the present embodiment, the process that its data recovery module 20 is recovered data comprises as follows: after trapping module 22 captures the lead-in that carries FAS and MFAS, know the channel number of the communication port that receives this lead-in according to the MFAS value of this lead-in.This channel number is corresponding to the channel number (hereinafter referred to as the source channel number) of the communication port of transmitting terminal.Because data split with 64 byte granularity, when 4 road communication ports were distributed, there were absolute corresponding relation in MFAS value and source channel number, referring to table 2, thereby can learn according to MOD (MFAS, 4) the source channel number corresponding to each road communication port of receiving terminal.Similarly, in the embodiment of the present invention data with other granularities split, when M road communication port is distributed, receiving terminal also can take this mode to know the source channel number that each road communication port is corresponding.

Table 2

After the device 2 of receive data is caught the channel number of multiple communication channels based on the MFAS value that occurs on communication port, can determine the orbution of data block on multiple communication channels of described data, thus the data of recovering.

(2) position of adjustment data block on multiple communication channels

In the embodiment of the present invention, determine parameter channel jump span cycle values k according to port number and the channel skip span of multiple communication channels, be used for the evenly residing channel spacing of latter two continuous lead-in of distribution of expression.When data block is adjusted, carry out take channel skip span cycle values k as unit of adjustment and adjust.This kind adjustment mode is called channel skip span cycle values grouping rotation mode (also claiming k frame grouping rotation mode), is specially:

Take channel skip span cycle values as unit of adjustment, recover requirement according to inverse multiplexing, the position (as in data block communication port 00 on move to communication port 01 on) of data block on each road communication port in mobile this channel skip span cycle values, making the position of Frame lead-in change to other communication ports from current communication port, is rotation on the present data flow of this technique table.

The below is specifically described with embodiment.Fig. 8 is the schematic diagram that the device of the transmission data of the embodiment of the present invention adopts the first adjustment mode to adjust.Wherein, the data block of a Frame by word1, word2 ..., word510 represents.Referring to Fig. 8, after the OTU Frame is distributed on 4 road communication ports 127 data blocks of 510 32 byte every road communication port distributions according to 32 bytes, also remain the data block (channel skip span) of 2 32 bytes, the two frame data data block of totally 1020 32 bytes can evenly be distributed on 4 road communication ports, the lead-in word (1) that wherein comprises FAS and MFAS only appears on communication port 00,02, remaining communication port be can't see lead-in, can not satisfy the inverse multiplexing recovery requirement that interior each road communication port of cycle is all distributed a lead-in.Be 2 with channel skip cycle values k value, adopt k frame grouping rotation mode (B=32, R=2, k=2) to distribute adjustment.In the present embodiment, channel skip span R=2, channel skip span cycle values k=2 (frame), the cycle in requiring with inverse multiplexing, in the present embodiment, this adjustment cycle equaled port number 4 as adjustment cycle.2 groups of channel skip cycle values are arranged in an adjustment cycle 4, and first group is not rotated, stepping of a follow-up group rotation.So repeat, lead-in will appear on the 00th, 02,01,03 communication port successively.After adjustment, data block can satisfy the inverse multiplexing recovery request.Referring to table 3, there is absolute corresponding relation in the source channel number of MFAS value and communication port, can directly get source channel number corresponding to each road communication port of receiving terminal according to MOD (MFAS, 4) thereby make.

Table 3

In the embodiment of the present invention, except (1) does not need, data are not distributed under the value condition of the B that enumerates under adjustment and M, it is similar according to the situation that 32 bytes are distributed to 4 road communication ports to the OTU Frame that other granularity splits the distribution situation, meets following relation:

MOD{A, (M * B) }=R * B formula (2.1)

MOD{A, (M * B) }=0 formula (2.2)

Wherein: MOD is complementation; A represents the byte number of the every frame of OTUk; M represents the port number of multiple communication channels; The B representative splits the granularity byte number; R represents lead-in channel skip span, and there is common divisor in the R here with the communication port number of distributing, and less than the natural number of M.

Formula (2.1): for R ≠ 0, and there are least common multiple (k * R) in R and M, MOD{ (k * R) is arranged, M) }=0 situation, the Data dissemination that means a minimum k optical transport unit (OTUk) Frame just can be dealt on the communication port of every road by average mark the lead-in in the OTUk Frame, take k OTUk Frame as the cycle, appear on specific communication port.K is designated as channel skip span cycle values (take the OTU frame as unit).

Formula (2.2): for the situation of R=0, lead-in only appears on the communication port of a certain road forever.Obviously, its channel skip span cycle values is k=1 (frame).

For example, to the division of OTU Frame according to 16 bytes: every row 4080 bytes, can be divided into 255 16 block of bytes, 4 row are divided into altogether the data block of 1020 16 bytes.The data block of 1020 16 bytes can evenly be distributed on 10 road and 20 road communication ports, also can evenly be distributed on 4 road communication ports.Lead-in always is distributed on the communication port 00 of this ground mark of source.Can't see lead-in on remaining communication port.Can adjust according to k frame grouping rotation mode (B=16, R=0, k=1), adjustment cycle equals port number M.

Can know, the data block of 1020 16 bytes can not evenly be distributed on 16 road communication ports.Every frame also remains 12 data blocks after distribution, so lead-in channel skip span R=12, channel skip span cycle values k=4 (frame).During distribution, next lead-in appears on the 12nd paths after the communication port that current lead-in occurs.And so forth, after k=4 frame period, lead-in Word (1) repeats again on four identical paths.Remaining 12 road communication port be can't see frame head and multi-frame indication.In the present embodiment, can adjust according to k frame grouping rotation mode (B=16, R=12, k=4), adjustment cycle equals port number M.

Alternatively, the device 1 that sends data can also adopt the front mode that data are adjusted that splits.It recovers requirement according to splitting granularity and inverse multiplexing, includes the word of frame alligning information of Frame and other word switch of this Frame in the Frame with data.This includes the word of frame alligning information of Frame and the byte number of other words equals to split granularity, and this word that includes the frame alligning information of Frame equates with the byte number of the data block of fractionation, and is all first data block of Frame, so also referred to as lead-in.The mode of data being adjusted before this fractionation is called in the lead-in frame and exchanges displacement mode, is specially:

According to the port number that splits granularity and multiple communication channels, determine channel skip span cycle values.Take channel skip span cycle values as unit of adjustment, recover requirement according to inverse multiplexing, with the lead-in of the Frame in channel skip span cycle values and other word switches in this Frame.The below is specifically described with embodiment.

The data of the embodiment of the present invention split take granularity as 16 bytes, 4 road communication ports are distributed, channel skip span R=0, and channel skip span cycle values k=1 frame, adjustment cycle is 4 frames.Fig. 9 is that the device of the transmission data of the embodiment of the present invention adopts the second adjustment mode to adjust and the schematic diagram for adjusting before splitting.Data are adjusted before splitting in order to distinguish, and distribution is adjusted the position of data block on each road communication port afterwards.Also provided the embodiment that adjusts after the distribution herein.The device of the transmission data of Figure 10 embodiment of the present invention adopts the 3rd adjustment mode to adjust and the schematic diagram for adjusting after distribution.Wherein, only show front four data blocks of a frame in Figure 10, with word1.1, word1.2, word1.3 and word1.4 represent, remaining data block represents with ellipsis.Referring to Fig. 9, in adjustment process, the cycle in requiring with inverse multiplexing, in fact the place-exchange at the first frame and place own did not move as adjustment cycle, and after the distribution, lead-in just appears on communication port 00 like this; Second word switch of the lead-in of the second frame and frame is so the lead-in of this Frame just appears on communication port 01.And so forth.To the 5th frame, lead-in is in the position at place own, has in fact begun the another one adjustment cycle.

Referring to Fig. 9 and Figure 10, in the embodiment of the present invention, to adjust through adjustment mode after adjustment mode before splitting or distribution, the position of the data block of data on each road communication port is identical, satisfies inverse multiplexing and recovers requirement.Because the adjustment reduction of receiving terminal need to, to be applicable to adjustment cycle be 2 integral number power to the exchange displacement mode in the lead-in frame, and port number is less than or equal to the situation of MFAS periodicity 256, be specially 2,4,8,16,32 ... 256, in these situations, there are absolute corresponding relation in MFAS and channel number.

As shown in table 4, data split take granularity as 16 bytes, when 4 road communication ports are distributed, channel number can directly be obtained by MOD (MFAS, 4), recognition methods is very simple.

Table 4

Two, inverse multiplexing recover to require as with the port number greater than described multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, in this cycle, has been distributed lead-in on multiple communication channels.

In the embodiment of the present invention, according to the port number of the actual multiple communication channels that adopts in transmission, select more than or equal to port number, and the smallest natural number that can divide exactly MFAS value multiframe period is that adjustment cycle is adjusted.Concrete optional adjustment cycle is 2,4,8,16,32 ... 256.For example, 20 road communication ports, optional adjustment cycle are 32; To the situation of 10 road communication ports, optional adjustment cycle is 16; Analogize in proper order.In the embodiment of the present invention, claim that this adjustment mode is that period expansion is adjusted mode.

Figure 11 is the schematic diagram that the device of the transmission data of the embodiment of the present invention adopts the 4th adjustment mode to adjust.Wherein, only show front 10 data blocks of a frame in Figure 11, with word1.1, word1.2, word1.3 ..., word1.10 represents, other data block represents with ellipsis.Referring to Figure 11, data split take granularity as 16 bytes, 10 road communication ports are distributed.Every frame can be divided into 1020 data blocks.Lead-in all appears on communication port 00.According to the above-mentioned rule of choosing adjustment cycle, the present embodiment selects 16 to be adjustment cycle.Wherein, adjusting operation can carry out according to exchange displacement mode or k frame grouping rotation mode in aforesaid lead-in frame, also can adjust according to other modes.

As an example, Figure 11 selective basis k frame grouping rotation mode is adjusted (front 3 frames and the 10th frame shown in Figure 11 to front 10 frames of determined adjustment cycle 16, other frames represent with ellipsis), rear 6 frames do not participate in adjusting (the 11st frame shown in Figure 11 and the 16th frame, other frames represent with ellipsis).The inverse multiplexing that the lead-in of rear 6 frames in each adjustment cycle does not participate in receiving terminal recovers to control, and when carrying out the data recovery, rear 6 frames all are considered to data message (lead-ins after comprising in 6 frames).Table 5 is listed and is carried out period expansion when adjusting, data with 16 byte granularity split, 10 road communication ports distribute, the absolute corresponding relation of MFAS value and multiple communication channels existence.Wherein, can determine according to the MFAS value of front 10 frame lead-ins in this adjustment cycle the source numbering of communication port.Channel number=MOD{[MOD (MFAS, adjustment cycle)], port number }=MOD{[MOD (MFAS, 16)], 10}.The MFAS value of rear 6 frame lead-ins does not participate in computing.

Table 5

Alternatively, when the embodiment of the present invention adopted period expansion adjustment mode to adjust, the position of lead-in on communication port can be also other rules.For example, take granularity as the situation that 16 bytes split, 20 road communication ports are distributed, after period expansion, adjustment cycle is 32 for data, can carry out the asymmetric rotational adjustment in adjustment cycle.Lead-in occurs once on each passage at least, and repeats according to adjustment cycle.Figure 12 is that the device of the transmission data of the embodiment of the present invention adopts the lead-in position view after the 5th adjustment mode is adjusted.Referring to Figure 12, each cell represents the data block of 16 bytes, and wherein marking the sequenced data block is lead-in.Only show front 20 data blocks of every frame in Figure 12, the row on corresponding Figure 12.During adjustment, the front 24 frame data frames in adjustment cycle (32), every 2 frames are done the rotation of a stepping.For MFAS=0,1 Frame, lead-in is distributed on communication port 00, and the distribution of data block is carried out according to communication port order 00,01,02...19, completes and so forth the distribution of this 2 frame data frame, analogizes in proper order.For MFAS=24 ... 31 frame, every frame is done the rotation of a stepping.The 31st frame, lead-in are on communication port 19, and other data blocks are distributed on communication port, and the circular order of channel number is 19,00,01 ... 18.After adjustment, same MFAS value can not be distributed on the communication port of not going the same way, thereby can be used for identifying channel number.On communication port 00, MFAS=0,1, (0+32), (1+32) ....Certainly it also can be adjusted according to exchange displacement adjustment mode in this rule selection employing lead-in frame.

Need to prove, in the embodiment of the present invention, be not 2 integral number power for the port number of multiple communication channels, and aliquant 256 o'clock, if adopt in the lead-in frame exchange displacement mode to adjust, needs life cycle expansion adjustment mode.This is due to this moment, the source channel number of communication port and the corresponding relation of MFAS value do not exist unique, namely there is not absolute corresponding relation, exchange displacement mode in period expansion adjustment and lead-in frame is combined with, can support the adjustment reduction of receiving terminal.

The device 2 of the receive data of the embodiment of the present invention recovers former data according to the frame alligning information in the data block that receives, and comprises one of following mode:

One, the absolute corresponding relation according to MFAS value and source channel number carries out the data recovery

The present embodiment is to receive granularity as 64 bytes split, 4 road communication ports are distributed data block as example, the process that data of description is recovered.

Figure 13 is the structural representation of trapping module in the device of receive data of fifth embodiment of the invention.Referring to Figure 13, trapping module 22 comprises:

Synchronous and the MFAS trapping module 220 of channel FAS is used for catching the FAS field and according to the FAS field, channel being carried out cycle synchronisation, thereby can determines the border of initial data frame and the border of the data block after fractionation.Described OTN FAS comprises 6 bytes, is specially byte one to byte six (representing with B1-B6): FAS-B1, FAS-B2, FAS-B3, FAS-B4, FAS-B5, FAS-B6.FAS-B1＝FAS-B2＝FAS-B3＝0xF6；FAS-B4＝FAS-B5＝FAS-B6＝0x28。At first the synchronous and MFAS trapping module 220 of channel FAS surveys FAS in data flow, if countless according to mistake, determine that the FAS on communication port is periodically appearance.Synchronous and continuous c (for example c=8) individual cycle of MFAS trapping module 220 of channel FAS is detected FAS, enters the genlocing state.In being in the lock state, can not detect FAS on the position of estimating, release synchronous regime, need to re-start synchronous.In synchronous regime, the synchronous and MFAS trapping module 220 of channel FAS can be directly after the FAS extraction MFAS value thereafter.Absolute channel number acquisition module 222 after being used for receiving the information content of catching the MFAS field, obtains source channel number corresponding to this communication port according to source channel number and the absolute corresponding relation of this MFAS value of communication port;

Delay compensation phase identification module 224 is for the delay compensation phase information that generates communication port.

In the present embodiment, the synchronous and MFAS trapping module of the FAS of each road communication port works alone, be independent of each other mutually, between each road communication port without alternately.

In enforcement, the MFAS value that the trapping module basis that each road communication port is corresponding is caught and the corresponding relation of this MFAS value and source channel number, can determine the channel number of the multiple communication channels of receiving terminal, also namely determine the orbution of data on this multiple communication channels.

Communication port order rearrangement module 23 is according to the channel number from each road communication port in the multiple communication channels of trapping module 22, then according to described channel number to multiple communication channels to resetting, after rearrangement, data enter delay compensation module 24, delay compensation module 24 is according to carrying out delay compensation from the channel delay compensation of phase information of trapping module 22, and the data block after postponing sends combination to and recovers module 26, and combination at last recovers module 26, and combination recovers former data according to boundary information.

Two, carrying out data according to multiple communication channels and the relative corresponding relation of source channel number recovers

(1) according to the value of the MFAS field of catching and the consistent relation that increases progressively of the channel number of the communication port that this MFAS field occurs, obtain the relative channel number of the multiple communication channels of receiving terminal, the orbution of specified data piece on multiple communication channels, thereby the data of recovering.

Figure 14 is the structural representation of trapping module in the device of receive data of sixth embodiment of the invention.Referring to Figure 14, the trapping module 22 as an example of 20 road communication ports example comprises:

Synchronous and the MFAS trapping module 220 of channel FAS is used for catching the FAS field and according to the FAS field, channel is carried out cycle synchronisation and generation boundary information.

Relative channel number arbitration modules 226, the consistent relation that increases progressively that is used for the channel number of the MFAS field value of catching and the communication port that this MFAS field value occurs, arbitrate out the relative channel number of multiple communication channels, the orbution of specified data on multiple communication channels;

Delay compensation phase identification module 224 is for the delay compensation phase information that generates communication port.

Situation for 10 road communication ports, 20 road communication ports, if adjustment cycle is not expanded, there is not absolute corresponding relation in MFAS and source channel bank numbering, is unfavorable for that directly the numerical value according to MFAS obtains the source channel number on the multiple communication channels of receiving terminal.

When carrying out the data recovery, on 22 pairs of each road communication ports of trapping module, catching of MFAS field is independently, the MFAS field information of catching on whole communication ports is sent to arbitration modules 226 and arbitrates, and analyzes the also relative channel number of output multi-channel communication port by arbitration modules 226.

For example, for data split take granularity as 16 bytes, when 20 road communication ports are distributed, k=1, adjustment cycle are 20; Perhaps, data split take granularity as 16 bytes, when 10 road communication ports are distributed, and k=1, adjustment cycle are 10; Perhaps, as distributing on 10 road communication ports, 20 passages in table 1, other situations of R=0, at first arbitration modules 226 selects a-road-through letter passage as communication port 00 from the communication port of M road, catch the MFAS value from this communication port, be designated as MFAS (0), correspondingly, the MFAS value of all the other road communication ports is designated as MFAS (i).In the OTU frame period scope of 256, because there is increasing order in the MFAS value, so MFAS (i) appears on certain road communication port, and this communication port can be determined by following relation with respect to the numbering of communication port 00:

MFAS(i)＝MOD{[MFAS(0)+(M*i)]，M}

Need to prove, because value cycle of MFAS is 256, therefore need to completes the identification of the relative channel number of communication port within this cycle and catch, surpass this cycle, identical MFAS numerical value may appear on the communication port of not going the same way.

Then, can carry out the data combination according to distribution granularity, channel delay compensation of phase information and the orbution of data on multiple communication channels of data block.Then the data of adjusting after 25 pairs of combinations of recovery module are adjusted reduction.Current can be also before data block is combined, and data block is carried out adjusted reduction.

(2) order that occurs on multiple communication channels according to the FAS field, the orbution of specified data piece on multiple communication channels, thereby the data of recovering.

When adopting the 100GE optical module to be divided into 20 road communication ports to transmit for the OTU4 signal, particularly in the situation of the short-distance transmission such as 10km, 40km, differential transfer between communication port postpones clearer and more definite, it is smaller fastest to the gap between the signal of the signal that reaches and arrival the most slowly, and much smaller than 510 bits.The demand of the buffer-stored resource that delay compensation module is corresponding is much smaller than 20 * 1024 bits of standard definition; When adopting the 40GE optical module to be divided into 4 road communication ports to transmit for the OTU3 signal, the demand of buffer-stored resource is much smaller than 4 * 2048 bits of standard definition.

In the embodiment of the present invention, when the OTU Frame transmits on each road communication port, the appearance of lead-in on each road communication is logical presents periodically, and this cycle is the cycle of an OTU frame at least, is an OTU frame length (16320b byte or 130560 bits) at least so occur the interval of FAS on the communication port of same road for twice.

When being divided into 20 road communication ports when the OTU4 signal transmitting on the 100GE optical module, on communication port, FAS occurs is spaced apart 130560/20=6528 (bit), much larger than the twice of the maximum multi-channel differential transmission delay 1024 of 100GE optical module.Therefore, just can provide enough phase mark abilities according to FAS, and the differential transfer delay compensation ability supported of this phase mark ability is much larger than the standard-required of 100GE.Briefly, maximum differential delay also can not change the order that occurs FAS on each road communication port.

Figure 15 is the process schematic diagram of device obtaining communication passage relative numbering of the receive data of the embodiment of the present invention.Referring to Figure 15, with the situation that 16 byte granularity split, 20 road communication ports are distributed, arbitration modules 226 can only simply be arbitrated in the order that each road communication port occurs according to FAS for data.At first arbitration determines that a-road-through letter passage is communication port 00, carries out the identification of source Data dissemination order according to the order that each road communication port occurs, and provides each road communication port with respect to the relative numbering of designated communication passage 00.

Thereby, can carry out the data combination according to granularity, FAS field information, channel delay compensation of phase information and the orbution of data block on multiple communication channels etc. of data block.

The present embodiment is specially adapted to the situation that the data in employing table 1 split with 6 byte granularity, 51 bit granularities.

The embodiment of the present invention is on the basis of the structure that does not affect existing network and OTU signal, make the OTU3 signal can adopt the 40GE optical module of 4x10G to transmit, realize low-cost short-distance transmission, the scale of this optical module is used the cost that will reduce with respect to present traditional 40G optical module; Also make the OTU4 signal can adopt the 100GE optical module of 10x10G and 4x25G to transmit, realize low-cost short-distance transmission, the scale of this optical module is used will further reduce itself relatively low cost.

And, the embodiment of the present invention is on the basis of the structure that does not affect existing network and OTU signal, also make OTU3 signal, OTU4 signal to realize long-distance transmissions on present 10GWDM transmission system, the OTU2 signal is transmitted on original 2.5G wdm system.

Figure 16 is the method flow schematic diagram to multiple communication channels transmission data of seventh embodiment of the invention.Referring to Figure 16, the method comprises the following steps:

Step S1601 according to splitting granularity, evenly splits into integer number of data blocks with each Frames of data.The fractionation granularity of configuration is not less than the byte number of frame alignment indication field FAS.

In the embodiment of the present invention, in the OTUk Frame, the expense of first 7 bytes is: the FAS of 6 bytes and 1 byte MFAS.According to the method described above, require the data block size (be called and split granularity) of fractionation to be at least 6 bytes.At least include frame alligning information (FAS, perhaps, FAS and MFAS) in first data block (being called lead-in) of every frame.

Step S1602 is distributed to the data block of data on described multiple communication channels regularly, appears on multiple communication channels so that the data block of the frame alligning information that includes Frame in the data block of data is regularly.

Step S1603 is by the data block of these multiple communication channels transmission data.

Adopt the method to multiple communication channels transmission data of the embodiment of the present invention, its part optionally splits granularity, and the data block number that obtains after the every frame fractionation of corresponding OTUk can be referring to table 1.Table 1 has also reflected the situation that rear data block evenly is distributed to 4 road communication ports, 16 road communication ports, 10 road communication ports, 20 road communication ports that splits.In the embodiment of the present invention, the range of channel's number of multiple communication channels is: greater than 1, less than or equal to 256.

Figure 17 is the method flow schematic diagram to multiple communication channels transmission data of eighth embodiment of the invention.Referring to Figure 17, the method comprises the following steps:

Step S1701 according to splitting granularity, evenly is split as integer number of data blocks with the Frame of data.The fractionation granularity of configuration is not less than the byte number of frame alignment indication field FAS.

Step S1702, the order according to data block in data is distributed to data block on multiple communication channels successively.

Step S1703 judges whether data block satisfies inverse multiplexing and recover requirement.If be judged as satisfied, execution in step S1704.Do not satisfy if be judged as, execution in step S1705., whether judging it is optional herein, can be also not judge direct execution in step S1705.

Step S1704 sends data block by multiple communication channels.

Step S1705 recovers requirement according to inverse multiplexing, adjusts the position of data block on multiple communication channels.

Step S1706 sends the data block after adjusting by multiple communication channels.

In the present embodiment, it is one of following that inverse multiplexing recover to require to comprise:

Take the port number of multiple communication channels as the cycle, in this cycle, be distributed a data block (lead-in) that includes frame alligning information on multiple communication channels; Perhaps

With the port number greater than multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, in this cycle, is distributed the data block that includes frame alligning information on multiple communication channels.

In the present embodiment, when being judged as to adjust the time, determine channel skip span cycle values according to the port number of channel skip span and multiple communication channels.The data block that this channel skip span is a Frame evenly is distributed to the remaining data piece number after multiple communication channels, and expression is the residing channel spacing of latter two continuous lead-in of distribution evenly.Cycle during inverse multiplexing is recovered to require is as adjustment cycle, in each adjustment cycle, take channel skip span cycle values as unit of adjustment, recover requirement according to inverse multiplexing, adjust the position of data block on multiple communication channels in channel skip span cycle values.

The device 1 that sends the transmission data that the process in the method for data, data block adjusted and example see the embodiment of the present invention for details to multiple communication channels of the embodiment of the present invention adopts k frame grouping rotation mode to distribute the detailed description of rear adjustment, is not giving unnecessary details at this.

Figure 18 is the method flow schematic diagram to multiple communication channels transmission data of ninth embodiment of the invention; Referring to Figure 18, the method comprises the following steps:

Step 1801 judges whether data are adjusted according to the port number that splits granularity and multiple communication channels.Split the byte number that granularity is not less than frame alignment indication field FAS.When being judged as YES, execution in step 1802.When being judged as NO, execution in step 1803., whether judging it is optional herein, can be also not judge directly data are adjusted.

Step 1802 is recovered requirement according to splitting granularity and inverse multiplexing, includes the word of frame alligning information of Frame and other word switch of this Frame in the Frame with data.This includes the word of frame alligning information of Frame and the byte number of other words equals to split granularity.This inverse multiplexing recovers to require to be specially:

Take the port number of multiple communication channels as the cycle, within this cycle, all be distributed a described word that includes the frame alligning information of Frame on multiple communication channels; Perhaps,

With the port number greater than multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the word of the frame alligning information that includes Frame on multiple communication channels.

During adjustment, according to the port number that splits granularity and multiple communication channels, determine channel skip span cycle values.Take channel skip span cycle values as unit of adjustment, according to the inverse multiplexing requirement, for the Frame in channel skip span cycle values, the word of frame alligning information of Frame and other word switch of this Frame will be included in Frame.

Step 1803 according to splitting granularity, evenly splits into integer number of data blocks with each Frames of data.

Step 1804 is distributed to the data block of data on multiple communication channels regularly, sends.

Herein, data have been carried out toning before fractionation whole, therefore, order according to data block in data, data block is distributed on described multiple communication channels successively, can makes the data block of the frame alligning information that includes Frame in the data block of data be regularly and appear on multiple communication channels.

In the embodiment of the present invention, the mode of adjustment data and the device 1 of the transmission data that example sees the embodiment of the present invention for details, are not being given unnecessary details at this by the detailed description of before splitting, data being adjusted in data.

Especially, make OTUk (k=3,4) signal carry out transmission problem on existing 100GE, 40GE multichannel light module, especially during 4,20 road communication port; Also make two high speed signals of OTUk (k=3,4) transmit in existing 10GWDM system, especially 4, during 10,16 road communication port.

With the method that sends data to multiple communication channels of the embodiment of the present invention accordingly, the embodiment of the present invention provides a kind of method from the multiple communication channels receive data to receive to multiple communication channels and has sent the data that the method for data sends.

This data receive method comprises: receive the data that are comprised of data block, and according to the data block of the frame alligning information that includes Frame of data, recover data.

In the embodiment of the present invention, frame alligning information is specially: the FAS field information, perhaps, FAS and MFAS field information.In the embodiment of the present invention, the mode of carrying out the data recovery comprises following:

One, according to the absolute corresponding relation of the channel number of the multiple communication channels of MFAS value and transmitting terminal, carry out data and recover.

For example, Figure 19 is the method flow schematic diagram from the multiple communication channels receive data of tenth embodiment of the invention.With reference to Figure 19, the method comprises the following steps:

Step S1901 receives the data that are comprised of data block.

Step S1902 catches the data block that comprises FAS and MFAS.

Step S1903 carries out frame synchronization according to the FAS field, and the border of the border of definite initial data frame and data block.

Step S1904 according to the absolute corresponding relation of the channel number of the communication port of MFAS field value and transmitting terminal, obtains the absolute channel number of each road communication port of receiving terminal.

In embodiment, if there are absolute corresponding relation in MFAS value and source channel bank numbering, for the communication port that captures certain MFAS value, this communication port can be directly by MOD (MFAS with respect to the corresponding relation of source channel number, M) obtain, recognition methods is very simple.

Step S1905, orbution, the boundary information of absolute channel number specified data piece on multiple communication channels according to multiple communication channels recovers data.

Two, according to the consistent relation that increases progressively of numbering that occurs the passage of this MFAS field value in the MFAS field value of catching and multiple communication channels, obtain the relative channel number of the multiple communication channels of receiving terminal, also namely determined the orbution of data block on multiple communication channels, recovered thereby carry out data.

Three, the order that occurs on each road communication port of receiving terminal according to the FAS field is determined the relative channel number of multiple communication channels, thereby the orbution of specified data piece on multiple communication channels recovered thereby carry out data.

Need to prove, the device 2 from the multiple communication channels receive data that the data recovery procedure of the present embodiment sees the embodiment of the present invention for details carries out the detailed description that data are recovered, and does not repeat them here.

Figure 20 is the method flow schematic diagram that multiple communication channels transmits data that is used for of eleventh embodiment of the invention.With reference to Figure 20, the method comprises the following steps:

Step S2001, transmitting terminal evenly splits into integer number of data blocks according to splitting granularity each Frame with data.Split the byte number that granularity is not less than frame alignment indication field FAS.

Step S2002, transmitting terminal is distributed to the data block of data on multiple communication channels regularly, appears at regularly on multiple communication channels so that the data block of the frame alligning information that includes Frame in these data blocks is;

Step S2003 sends the data block of data by multiple communication channels;

Step S2004, receiving terminal receive the data that are comprised of data block, and according to the data block of the frame alligning information that includes Frame of data, recover data.

Wherein, frame alligning information is specially: the FAS field information, perhaps, FAS and MFAS field information.In the embodiment of the present invention, transmitting terminal also is distributed to regularly many communication channels with Data Division and sends and can describe to the method that multiple communication channels sends data referring to the embodiment of the present invention; Recovering former data after the data block of receiving terminal receive data can describe referring to the method from the multiple communication channels receive data of the embodiment of the present invention.

One of ordinary skill in the art will appreciate that all or part of flow process that realizes in above-described embodiment method, to come the relevant hardware of instruction to complete by computer program, described program can be stored in a computer read/write memory medium, this program can comprise the flow process as the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.

The above is the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.

Claims (17)

1. method that sends data to multiple communication channels, described data are comprised of a plurality of optical transport unit Frames, it is characterized in that, comprising:

According to splitting granularity, each Frames of described data evenly is split as integer number of data blocks, described fractionation granularity is not less than the byte number of frame alignment indication field FAS;

The data block of described data is distributed on described multiple communication channels regularly, appears at regularly on described multiple communication channels so that the data block of the frame alligning information that includes Frame in the data block of described data is;

Send the data block of described data by described multiple communication channels;

Described data block with described data is distributed on described multiple communication channels regularly, comprising:

According to the order of described data block in described data, described data block is distributed on described multiple communication channels successively;

Whether judgement is distributed to described data block on described multiple communication channels satisfies described inverse multiplexing and recovers requirement, if do not satisfy, recovers requirement according to described inverse multiplexing, adjusts the position of described data block on described multiple communication channels; If satisfy, do not carry out adjustment;

Described inverse multiplexing recovers to require to be specially:

Take the port number of described multiple communication channels as the cycle, within this cycle, all be distributed a data block that includes the frame alligning information of Frame on described multiple communication channels; Perhaps,

With the port number greater than described multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the data block of the frame alligning information that includes Frame on described multiple communication channels.

2. method according to claim 1, is characterized in that, describedly recovers requirement according to described inverse multiplexing, adjusts the position of described data block on described multiple communication channels, is specially:

According to the port number of channel skip span and described multiple communication channels, determine channel skip span cycle values, the data block that described channel skip span is a Frame evenly is distributed to the remaining data piece number after described multiple communication channels;

Take described channel skip span cycle values as unit of adjustment, recover requirement according to described inverse multiplexing, adjust the position of data block on described multiple communication channels in described channel skip span cycle values.

3. method according to claim 1, is characterized in that, and is described according to splitting granularity, before the Frame of described data is evenly split into the integer number of data blocks step, also comprises:

Recover requirement according to splitting granularity and inverse multiplexing, include the word of frame alligning information of Frame and other word switch of this Frame in Frame with described data, the word of the described frame alligning information that includes Frame and the byte number of other words equal described fractionation granularity;

Described inverse multiplexing recovers to require to be specially:

Take the port number of described multiple communication channels as the cycle, within this cycle, all be distributed a described word that includes the frame alligning information of Frame on described multiple communication channels; Perhaps,

With the port number greater than multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the described word that includes the frame alligning information of Frame on described multiple communication channels.

4. method according to claim 3, is characterized in that, described according to splitting granularity and inverse multiplexing recovery requirement, other word switch of the word of the frame alligning information of the Frame that includes in the Frame with described data and this Frame is specially:

According to the port number of described fractionation granularity and described multiple communication channels, determine channel skip span cycle values;

Take described channel skip span cycle values as unit of adjustment, according to described inverse multiplexing requirement, for the Frame in described channel skip span cycle values, the word of frame alligning information of Frame and other word switch of this Frame will be included in Frame.

5. a device that sends data to multiple communication channels, is characterized in that, comprising:

Split module, be used for according to splitting granularity, each optical transport unit Frames of described data evenly is split as integer number of data blocks, described fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Distribution module, be used for according to the order of described data block in described data, data block after splitting is distributed on described multiple communication channels successively, appear at regularly on described multiple communication channels so that the data block of the frame alligning information that includes Frame in described data block is, and send described data block by described multiple communication channels;

Described device also comprises the first adjusting module, and described the first adjusting module comprises:

First adjusts control module, is used for the port number according to described fractionation granularity and described multiple communication channels, judges whether to satisfy inverse multiplexing and recovers requirement;

First adjusts processing module, be used for when being judged as YES, recover requirement according to described fractionation granularity and described inverse multiplexing, include the word of frame alligning information of Frame and other word switch of this Frame in Frame with described data, and the data after adjusting send described fractionation module to, when being judged as NO, directly send described data to the fractionation module;

The device of described transmission data also comprises: memory module is used for the storage inverse multiplexing and recovers requirement; Described inverse multiplexing recovers to require to be specially:

Take the port number of described multiple communication channels as the cycle, within this cycle, all be distributed a described word that includes the frame alligning information of Frame on described multiple communication channels; Perhaps,

With the port number greater than multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the described word that includes the frame alligning information of Frame on described multiple communication channels.

6. a device that sends data to multiple communication channels, is characterized in that, comprising:

Split module, be used for according to splitting granularity, each optical transport unit Frames of described data evenly is split as integer number of data blocks, described fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Distribution module is used for according to the order of described data block in described data, and the data block after splitting is distributed on described multiple communication channels successively;

The second adjusting module, be used for recovering requirement according to inverse multiplexing, adjust the position of described data block on described multiple communication channels, appear at regularly on described multiple communication channels so that the data block of the frame alligning information that includes Frame in described data block is, and the data block after adjusting sends by described multiple communication channels; This second adjusting module comprises:

Second adjusts control module, is used for judging that described distribution module is distributed to the described data block on multiple communication channels, whether satisfies described inverse multiplexing and recovers requirement;

Second adjusts processing module, be used for when being judged as when not satisfying, recover requirement according to described inverse multiplexing, adjust the position of described data block on described multiple communication channels, and the data block after adjusting sends by described multiple communication channels, when being judged as when satisfying, do not carry out adjustment, directly described data block is sent by described multiple communication channels;

Described device also comprises: memory module is used for the storage inverse multiplexing and recovers requirement; Described inverse multiplexing recovers to require to be specially:

Take the port number of described multiple communication channels as the cycle, within this cycle, all be distributed a data block that includes the frame alligning information of Frame on described multiple communication channels; Perhaps,

With the port number greater than described multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the data block of the frame alligning information that includes Frame on described multiple communication channels.

7. the method from the multiple communication channels receive data, receive the data by the method transmission of transmission data claimed in claim 1, it is characterized in that:

Receive the described data that formed by data block, and according to the data block of the frame alligning information that includes Frame of described data, recover described data.

8. the method for receive data according to claim 7, the frame alligning information of the Frame that comprises in described data block is specially:

Frame alignment indication FAS field; Perhaps

Frame alignment indication FAS field and multiframe alignment indication MFAS field.

9. the method for receive data according to claim 8, is characterized in that, described method comprises:

According to the frame alligning information in the data block of the described frame alligning information that includes Frame, determine the orbution of data block on the multiple communication channels of receiving terminal of described data, recover described data; The described mode of determining the orbution of described data block on the multiple communication channels of receiving terminal comprises one of following:

If the maximum differential transfer of receiving terminal compensation postponed less than 1/2 of the described data frame transfer time, catch the order that the FAS field occurs on the multiple communication channels of receiving terminal, obtain the relative channel number of described multiple communication channels, determine the orbution of described data block on described multiple communication channels;

Catch the MFAS field, absolute corresponding relation according to the channel number of the multiple communication channels of the value of described MFAS field and transmitting terminal, obtain the absolute channel number of the multiple communication channels of receiving terminal, determine the orbution of described data block on multiple communication channels; Perhaps,

Catch the MFAS field, according to the value of described MFAS field and the consistent relation that increases progressively of the channel number of the communication port that described MFAS field occurs, obtain the relative channel number of the multiple communication channels of receiving terminal, determine the orbution of described data block on multiple communication channels.

10. device from the multiple communication channels receive data is used for receiving the data that the device of the transmission data of claim 7 sends, and it is characterized in that, described device comprises:

Data recovery module is used for the data block according to the frame alligning information that includes Frame of described data, recovers described data.

11. the device of receive data according to claim 10 is characterized in that, described data recovery module comprises:

Trapping module, be used for catching the frame alignment indication field FAS of described frame alligning information, the perhaps frame alignment indication field FAS of described frame alligning information and multiframe alignment indication MFAS field, and determine the channel number of multiple communication channels in the device of described receive data according to described FAS field or MFAS field;

Combination recovers module, is used for the channel number according to the definite described multiple communication channels of described trapping module, carries out the data combination.

12. the device of receive data according to claim 10 is characterized in that, described data recovery module comprises:

Trapping module, be used for catching the frame alignment indication field FAS of described frame alligning information, the perhaps frame alignment indication field FAS of described frame alligning information and multiframe alignment indication MFAS field, and determine the channel number of multiple communication channels in the device of described receive data according to described FAS field or MFAS field;

Communication port order rearrangement module is used for according to the channel number of the definite described multiple communication channels of described trapping module, described multiple communication channels being reset;

Combination recovers module, also obtains described data block for the multiple communication channels after rearrangement, carries out the data combination.

13. the device of according to claim 11 or 12 described receive datas is characterized in that, described trapping module further comprises:

Relative channel number arbitration modules, for the order that occurs on multiple communication channels according to described FAS field, or the consistent relation that increases progressively of channel number of the value of described MFAS field and the communication port that described MFAS field occurs, the channel number of arbitrating out described multiple communication channels.

14. the device of according to claim 11 or 12 described receive datas is characterized in that, when receiving when being the data that were adjusted, described data recovery module further comprises:

Adjust recovery module, be used for before the work of described inverse multiplex data composite module or after work, the data block of described data adjusted reduction.

15. one kind is used for the system that multiple communication channels transmits data, it is characterized in that, described system comprises:

Described device and the device from the multiple communication channels receive data claimed in claim 10 that sends data to multiple communication channels of claim 5 or 6.

16. one kind is used for the method that multiple communication channels transmits data, described data are comprised of a plurality of optical transport unit Frames, it is characterized in that, described method comprises:

Transmitting terminal is according to splitting granularity, and each Frames of described data evenly is split as integer number of data blocks, and described fractionation granularity is not less than the byte number of frame alignment indication field FAS;

Described transmitting terminal is distributed to the data block of described data on multiple communication channels regularly, appears at regularly on described multiple communication channels so that the data block of the frame alligning information that includes Frame in the data block of described data is; And send described data block by described multiple communication channels.

Receiving terminal receives the data that are comprised of described data block, and according to the data block of the frame alligning information that includes Frame of described data, recovers described data;

Described transmitting terminal is distributed to the data block of described data on described multiple communication channels regularly, comprising:

According to the order of described data block in described data, described data block is distributed on described multiple communication channels successively;

Whether judgement is distributed to described data block on described multiple communication channels satisfies described inverse multiplexing and recovers requirement, if do not satisfy, recovers requirement according to described inverse multiplexing, adjusts the position of described data block on described multiple communication channels; If satisfy, do not carry out adjustment;

Described inverse multiplexing recovers to require to be specially:

Take the port number of described multiple communication channels as the cycle, within this cycle, all be distributed a data block that includes the frame alligning information of Frame on described multiple communication channels; Perhaps,

With the port number greater than described multiple communication channels, and the smallest natural number that can divide exactly multiframe alignment indication field MFAS periodic quantity is the cycle, within this cycle, all is distributed the data block of the frame alligning information that includes Frame on described multiple communication channels.

17. method according to claim 16 is characterized in that, the frame alligning information of the Frame that comprises in described data block is specially:

Frame alignment indication field FAS; Perhaps

Frame alignment indication field FAS and multiframe alignment indication field MFAS.

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