CN102281477A - Method and device for mapping and demapping optical transport network (OTN) service - Google Patents
Method and device for mapping and demapping optical transport network (OTN) service Download PDFInfo
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- CN102281477A CN102281477A CN2011102374388A CN201110237438A CN102281477A CN 102281477 A CN102281477 A CN 102281477A CN 2011102374388 A CN2011102374388 A CN 2011102374388A CN 201110237438 A CN201110237438 A CN 201110237438A CN 102281477 A CN102281477 A CN 102281477A
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1605—Fixed allocated frame structures
- H04J3/1652—Optical Transport Network [OTN]
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Abstract
The invention discloses a method and a device for mapping and demapping an optical transport network (OTN) service. The mapping method is applied to the process of mapping a low rate level service to a high rate level service, and comprises the following steps of: caching service data to be mapped; selecting a corresponding mapping mode according to the rate levels before and after mapping; generating corresponding adjustment cost according to the selected mapping mode and the current cached data volume; and encapsulating the cached service data, the adjustment cost and the generated frame header into a frame according to the adjustment cost and the mapping mode and transmitting the frame, wherein the mapping mode comprises an asynchronous mapping mode and a generic mapping mode. By the method and the device, the mapping/demapping function can be realized simply and the expandability is achieved. The method and the device can be conveniently applied to mapping and demapping higher rate services into which a future standard is possibly introduced.
Description
Technical field
The present invention relates to optical communication field, relate in particular to the professional mapping of a kind of OTN and separate the method and apparatus of mapping.
Background technology
OTN (Optical Transport Network, optical transfer network) is based on wavelength-division multiplex technique, organizes the transmission net of transfer of data at photosphere, is follow-on Backbone Transport Network.OTN is according to the digital transmission system of new generation and the optical transport hierarchy that G.872, G.709 reach the suggestion institute standard that G.798 waits a series of ITU-T (International Telecommunications Union's telecommunication standards tissue).OTN will solve traditional WDM (Wavelength Division Multiplexing, wavelength division multiplexing) network does not have problems such as the weak and protective capability of the long service dispatching ability of wavelength/wavelet, networking capability is weak.
OTN has defined the business of four kinds of speed class at present, is respectively OTUk (Optical Channel Transport Unit-k, light path delivery unit k), and k equals 1,2, and 3,4.As shown in Figure 1, the form of OTUk signal is that 4 row are taken advantage of 4080 row, OTUk signaling bearer ODUk (Optical Channel Data Unit-k, light path data cell k) and FEC (Forward Error Correction, forward error correction).The form of ODUk signal is that 4 row are taken advantage of 3824 row, carrying OPUk (Optical Channel Payload Unit-k, light path Payload Unit k) and ODUk expense.The form of OPUk signal is that 4 row are taken advantage of 3808 row.
The business of OTN standard definition must be able to realize carrying downwards, and promptly the business that speed grade is high must possess the ability of the low business of bearer rate grade.For example, OTU2 is professional must carry odu0, odu1, oduflex (flexible rate light digital units) business; OTU3 is professional must to carry business such as odu0, odu1, odu2, oduflex, odu2e.
According to existing standard, the implementation that low rate grade business is mapped to two-forty grade business has two kinds, that is: asynchronous mapping rules (Asynchronous Mapping Procedures, abbreviate AMP as) mode and general mapping rules (Generic Mapping Procedures abbreviates GMP as) mode.
Along with improving constantly of service rate grade, two-forty grade service needed loaded service type is more, more complicated.For example, in a plurality of time slots of an ODUk, the mapping mode of each time slot is independently, that is: can be different for the mapping mode of different time-gap configuration.This just needs professional transmitting terminal to support two kinds of mapping modes simultaneously.If when realizing, two kinds of mapping modes are carried out simple addition, cost is increased, and implement very complicated.
Summary of the invention
The present invention proposes the professional mapping of a kind of OTN of realization, separate the method and apparatus of mapping, with two kinds of mapping modes realizing the OTN business simultaneously, separate mapping mode.
For addressing the above problem, the invention provides a kind of mapping method of realizing the optical transfer network business, be applied to low rate grade business in the process that two-forty grade business is shone upon, comprising:
The business datum that buffer memory is to be mapped;
According to the speed grade before and after the mapping, select corresponding mapping mode, then according to the data volume of selected mapping mode and current cache, produce the corresponding expense of adjusting, and send according to described adjustment expense and described mapping mode the laggard row of frame head encapsulation framing with the described business datum of buffer memory, described adjustment expense and generation; Wherein, described mapping mode comprises: asynchronous mapping mode or general mapping mode.
Further, described method also comprises:
According to the speed grade before and after the mapping, select corresponding PT Payload Type, and when described business datum is encapsulated framing, described PT Payload Type is encapsulated in the described frame.
Correspondingly, the invention provides a kind of mapping device of realizing the optical transfer network business, comprising:
Data input module is used for after receiving the condition indicative signal that data map first-in first-out (FIFO) module is sent, and sends to described data map fifo module and writes enable signal;
Described data map fifo module is used for sending described condition indicative signal to described data input module and general mapping block and/or asynchronous mapping module; Be used for receive described write enable signal after, write business datum to be mapped to this module; Also be used for the map type sent according to configuration module, select to read enable signal, read described business datum to be mapped from this module with the corresponding mapping block of described map type is sent;
General mapping block, be used for receiving after light path data cell k (ODUk) becomes the frame head and multi-frame signal that frame module sends, according to the current data quantity stored of described data map fifo module of carrying in the described condition indicative signal that receives, generate and adjust expense and send to described ODUk one-tenth frame module, send to described data map FIFO and read enable signal;
The asynchronous mapping module, be used for receiving after light path data cell k (ODUk) becomes the frame head and multi-frame signal that frame module sends, according to the current data quantity stored of described data map fifo module of carrying in the described condition indicative signal that receives, generate and adjust expense and send to described ODUk one-tenth frame module, send to described data map FIFO and read enable signal;
ODUk becomes frame module, is used to produce frame head and multi-frame signal and sends to the asynchronous mapping module and/or general mapping block; Also be used for the business datum described to be mapped of described data map fifo module output, described frame head, multi-frame signal and with receive with the corresponding adjustment expense encapsulation of described mapping mode framing after export;
Configuration module is used to dispose the mapping mode that is adopted from low rate grade business when two-forty grade business is shone upon, and selects corresponding mapping mode to send to described data map fifo module and described ODUk one-tenth frame module.
Further,
Described data map fifo module is used for sending described condition indicative signal to general mapping block or asynchronous mapping module, specifically comprises:
Described data map fifo module is used for the described mapping mode sent according to described configuration module, only sends described condition indicative signal to the mapping block corresponding with described mapping mode.
Further,
Configuration module also is used for becoming frame module with sending to described ODUk with the corresponding PT Payload Type of selecting of mapping mode;
Described ODUk becomes frame module also to be used for described PT Payload Type is encapsulated in described frame.
The present invention also provides a kind of de-mapping method of realizing the optical transfer network business, is applied to two-forty grade business and separates in the process of mapping to low rate grade business, comprising:
The two-forty grade traffic frame that receives is carried out deciding frame, find the frame head of this frame;
Determine to adjust expense according to described frame head;
According to the speed grade of separating the mapping front and back, select to separate mapping mode accordingly, according to selected mapping mode and the described adjustment expense of separating, read low rate grade business datum from the relevant position of described frame then; Wherein, the described mapping mode of separating comprises: asynchronous mapping mode or the working solution mapping mode separated.
Further,
If the selected mapping mode of separating is the asynchronous mapping mode of separating, then describedly read low rate grade business datum from the relevant position of described frame according to selected mapping mode and the described adjustment expense of separating, specifically comprise:
Whether whether the position of determining negative justification opportunity byte, positive justification opportunity byte 1 and the positive justification opportunity byte 2 of described two-forty grade traffic frame according to described adjustment expense is data, rule out and carry out read operation on described negative justification opportunity byte, positive justification opportunity byte 1 and positive justification opportunity byte 2.
Further,
If the selected mapping mode of separating is the working solution mapping mode, then describedly read low rate grade business datum from the relevant position of described frame according to selected mapping mode and the described adjustment expense of separating, specifically comprise:
If the data that go out payload section according to described adjustment overhead computational are effectively, then from described payload section, read described low rate grade business datum.
Correspondingly, the present invention also provides a kind of mapping device of separating of realizing the optical transfer network business, and comprising:
Light path data cell k (ODUk) separates frame module, and the two-forty grade traffic frame that receives is carried out deciding frame, finds the frame head of this frame; Also be used for determining to adjust expense, and described adjustment expense is sent to asynchronous mapping block and/or the working solution mapping block separated according to described frame head;
Described working solution mapping block is used for separating the condition indicative signal that mapping first-in first-out (FIFO) module is sent according to described adjustment expense that receives and data, produces to write enable signal and send to described data and separates the mapping fifo module;
The described asynchronous mapping block of separating is used for separating the condition indicative signal that the mapping fifo module is sent according to described adjustment expense that receives and data, produces to write enable signal and send to described data and separates the mapping fifo module;
Described data are separated the mapping fifo module, are used for reading module and described working solution mapping block and/or the asynchronous mapping block of separating to data and send described condition indicative signal; Be used for separating map type, select to separate with described that map type is corresponding separates the enable signal of writing that mapping block sends, write described ODUk to this module and separate the described two-forty grade traffic frame that frame module receives according to what configuration module was sent;
Described data outputting module is used for after receiving the condition indicative signal that described data map fifo module is sent, and separates mapping from described data and reads the low rate grade ODUk data of separating after the mapping the fifo module;
Configuration module is used to dispose from what two-forty grade business was adopted when low rate grade business is separated mapping and separates mapping mode, and selects to separate accordingly mapping mode and send to that described data are separated the mapping fifo module and described ODUk separates frame module.
Further,
Described data are separated the mapping fifo module and are used for sending described condition indicative signal to general mapping block or asynchronous mapping module, specifically comprise:
Described data are separated the mapping fifo module and are used for the described mapping mode of separating sent according to described configuration module, only to sending described condition indicative signal with the described corresponding mapping block of separating of mapping mode of separating.
Further,
Described ODUk separates frame module and is used for described adjustment expense is sent to asynchronous mapping block and/or the working solution mapping block separated, and specifically comprises:
Described ODUk separates frame module and is used for the described mapping mode of separating sent according to described configuration module, only to sending described adjustment expense with the described corresponding mapping block of separating of mapping mode of separating.
Further,
Describedly asynchronously separate mapping and be used for determining according to described adjustment expense whether the position of negative justification opportunity byte, positive justification opportunity byte 1 and the positive justification opportunity byte 2 of described two-forty grade traffic frame is data whether rule out on the position of described negative justification opportunity byte, positive justification opportunity byte 1 and positive justification opportunity byte 2 to produce and write enable signal.
Further,
Described working solution mapping mode is used for then producing and writing enable signal accordingly if the data that go out payload section according to described adjustment overhead computational are effectively.
By the present invention can be so that this mapping/separate mapping function to implement simply relatively, and have extensibility, the mapping of the more high speed business that the standard in the future of can being applied to very easily may be introduced, separate during mapping realizes.
Description of drawings
Fig. 1 is a light path delivery unit frame structure schematic diagram in the prior art;
Fig. 2 is that the OTN mapping realizes block diagram in the embodiment of the invention;
Fig. 3 realizes block diagram for OTN in the embodiment of the invention separates mapping.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, hereinafter will be elaborated to embodiments of the invention in conjunction with the accompanying drawings.Need to prove that under the situation of not conflicting, embodiment among the application and the feature among the embodiment be combination in any mutually.
Present embodiment mainly provides the professional mapping of a kind of OTN of realization and has separated the method and apparatus of mapping.
As shown in Figure 2, mapping device comprises with lower module:
Data input module:, produce and write enable signal and send to the data map fifo module according to the condition indicative signal that data map FIFO (First In First Out, first-in first-out) module is sent;
Asynchronous mapping module: be used to realize the asynchronous mapping function, after receiving the ODUk frame head and multi-frame signal that ODUk one-tenth frame module is sent, the data volume of this data map fifo module current cache of carrying in the condition indicative signal of sending according to the data map fifo module, produce asynchronous mapping and adjust expense and send to ODUk one-tenth frame module, produce simultaneously and read enable signal and send to asynchronous mapping FIFO;
General mapping block: be used to realize general mapping function, after receiving the ODUk frame head and multi-frame signal that ODUk one-tenth frame module is sent, the data volume of this data map fifo module current cache of carrying in the condition indicative signal of sending according to the data map fifo module, produce general mapping and adjust expense and send to ODUk one-tenth frame module, produce simultaneously and read enable signal and send to general mapping FIFO;
ODUk becomes frame module: be used to produce two-forty grade ODUk frame head and multi-frame signal and send to the asynchronous mapping module and general mapping block, simultaneously the PT that sends of the adjustment overhead value of sending according to the mapping block of correspondence low rate grade ODUk business datum, two-forty grade ODUk frame head, multi-frame signal, configuration module that the data map fifo module is sent and adjust the relevant position that expense is inserted into two-forty grade ODUk frame.
Data map fifo module: write enable signal according to what data input module was sent, low rate grade ODUk data are written in this module, the map type that while sends according to configuration module, correspondingly select the read signal of asynchronous mapping module or general mapping block output, sense data from this module.If the map type that receives is an asynchronous mapping, then select the read signal of asynchronous mapping module output; If the map type that receives is general mapping, then select the read signal of general mapping block output.This module is returned data input module and is sent the fifo status index signal, and data input module is the Rule of judgment of this input as generation FIFO write signal.This module sends the fifo status index signal for asynchronous mapping module and general mapping block, and asynchronous mapping module and general mapping block produce the adjustment expense according to the data volume of the current current cache of carrying in this fifo status index signal.
Configuration module: this module can provide the type of service before and after the interface for users configuration mapping, promptly disposes low rate grade ODUk type of service, and for example disposing current low rate grade ODUk business is ODU0, ODU1, ODU2, ODUFLEX etc.While is configuration high-speed rate grade ODUk type of service also, mainly is configuration ODU2, ODU3, ODU4.Low rate grade ODUk and two-forty grade ODUk type of service according to configuration, what then can know realization is that low rate grade ODUk is professional to two-forty grade ODU2, ODU3, the mapping of ODU4 business, the mapping mode that is adopted when the professional mapping of two-forty grade according to the low rate grade business of configuration, can determine specifically to adopt which kind of mapping mode, i.e. asynchronous mapping mode or general mapping mode, and this mode is notified to the data map fifo module and ODUk becomes frame module.Choosing of concrete mapping mode referring to table 1.Wherein, AMP represents the asynchronous mapping mode, and GMP represents general mapping mode, and PT represents PT Payload Type.After determining required mapping mode, need that also this pairing PT of mapping mode that determines is sent to ODUk and become frame module.
Table 1 mapping mode is selected signal
Correspondingly, as shown in Figure 3, separate mapping device and comprise with lower module:
ODUk separates frame module: be used to carry out two-forty grade ODUk and decide frame, after finding the frame head of two-forty grade ODUk Frame, generate ranks number according to header signal, extract the adjustment expense in the two-forty grade ODUk frame in view of the above, and will adjust expense and send to asynchronous mapping block and the working solution mapping block separated.Simultaneously the two-forty grade ODUk data that extract are given and separate the mapping fifo module;
The asynchronous mapping block of separating: realize the asynchronous mapping function of separating, be used for separating the mapping condition indicative signal sent of fifo module and the adjustment expense that receives, produces the asynchronous enable signal of writing that shines upon FIFO of separating according to data;
Working solution mapping block: realize the working solution mapping function, be used for separating condition indicative signal that the mapping fifo module sends and the adjustment expense that receives, produce the enable signal of writing of working solution mapping FIFO according to data;
Data are separated the mapping fifo module: be used for separating map type according to what configuration module was sent, select the asynchronous enable signal of writing of writing enable signal or the output of working solution mapping block of separating mapping block output, the two-forty grade ODUk frame data of ODUk being separated frame module output are written in this module.
Data are read module: separate the condition indicative signal that the mapping fifo module is sent according to data, and sense data from separate the mapping fifo module, this promptly separates the low rate grade ODUk data after the mapping.
Configuration module: this module is mainly used in provides interface for users configuration low rate grade ODUk type of service, and for example disposing current low rate grade ODUk business is ODU0, ODU1, ODU2, ODUFLEX etc.While is configuration high-speed rate grade ODUk type also.According to low rate grade ODUk and two-forty grade ODUk type of service, then can know realization be low rate grade ODUk to ODU2, ODU3, the mapping of ODU4.Thereby can determine which kind of adopts separate mapping mode, the promptly asynchronous mapping mode of separating still is the working solution mapping mode.Concrete mapping regulation is referring to table 1.
The mapping implementation step:
(1) user's configuration high-speed rate grade and low rate grade ODUk type of service can be known corresponding map type according to table 1;
(2) condition indicative signal of sending according to the data useful signal and the data map fifo module of outside input produces the enable signal of writing of FIFO;
(3) the asynchronous mapping module according to the condition indicative signal that the data map fifo module that receives is sent, produces the enable signal of reading that asynchronous mapping is adjusted expense and FIFO after receiving the two-forty grade ODUk frame head and multi-frame signal that ODUk one-tenth frame module is sent;
(4) general mapping block according to the condition indicative signal that the data map fifo module that receives is sent, produces the enable signal of reading that expense and FIFO are adjusted in general mapping after receiving the two-forty grade ODUk frame head and multi-frame signal that ODUk one-tenth frame module is sent;
(5) the data map fifo module is determined map type according to user's configuration, and promptly asynchronous mapping mode or general mapping mode select corresponding FIFO to read enable signal then, according to the low rate grade ODUk data of reading enable signal output FIFO buffer memory.
In this step, can support general mapping and asynchronous mapping simultaneously, the supporting business flexible configuration, thus realized mixing mapping (promptly supporting general mapping and asynchronous mapping simultaneously).
(6) ODUk becomes frame module the low rate grade ODUk data of two-forty grade ODUk frame head, multi-frame signal and the output of data map fifo module of generation to be written to successively the payload section of two-forty grade ODUk frame.The adjustment expense that adjustment expense that the mapping mode of selecting according to the data map fifo module is correspondingly sent the asynchronous mapping module or general mapping block are sent is written to the overhead area of two-forty grade ODUk.
Separate the mapping implementation step:
(1) user's configuration high-speed rate grade and low rate grade ODUk type of service can be known corresponding map type according to table 1;
(2) ODUk separates frame module and carries out two-forty grade ODUk and decide frame and find two-forty grade ODUk frame head;
(3) calculate the row number of two-forty grade ODUk frame and row number according to two-forty grade ODUk frame head;
(4) number find the adjustment expense according to the row of two-forty grade ODUk frame number and row;
(5) this is adjusted expense and send to asynchronous mapping and the working solution mapping block separated;
(6) asynchronous mapping block and the working solution mapping block separated be according to the adjustment expense that receives, and data are separated condition indicative signal that the mapping fifo module sends and produced to write enable signal and send to data and separate the mapping fifo module.For the asynchronous mapping block of separating, can determine whether NJO (negative justification opportunity byte), PJO (positive justification opportunity byte) 1, PJO2 are data according to adjusting expense, thereby determine at NJO, PJO1, whether the PJO2 position produces writes enable signal.For the working solution mapping block, need be effectively or invalid according to adjusting data that overhead computational goes out payload section, write enable signal thereby produce in the position of valid data;
(7) separate the mapping fifo module and correspondingly select the asynchronous enable signal of writing that mapping block or working solution mapping block produce of separating, two-forty grade ODUk frame data are written to separate in the mapping fifo module according to writing enable signal according to the user configured map type of separating;
(8) data are read module and are read enable signal according to separating current metadata cache state in the mapping fifo module, producing, and read low rate grade ODUk data from separate the mapping fifo module, thereby realize understanding mapping function.
One of ordinary skill in the art will appreciate that all or part of step in the said method can instruct related hardware to finish by program, described program can be stored in the computer-readable recording medium, as read-only memory, disk or CD etc.Alternatively, all or part of step of the foregoing description also can use one or more integrated circuits to realize.Correspondingly, each the module/unit in the foregoing description can adopt the form of hardware to realize, also can adopt the form of software function module to realize.The present invention is not restricted to the combination of the hardware and software of any particular form.
The above is the preferred embodiments of the present invention only, is not to be used to limit protection scope of the present invention.According to summary of the invention of the present invention; also other various embodiments can be arranged; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention; within the spirit and principles in the present invention all; any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (13)
1. a mapping method of realizing the optical transfer network business is applied to low rate grade business in the process that two-forty grade business is shone upon, and comprising:
The business datum that buffer memory is to be mapped;
According to the speed grade before and after the mapping, select corresponding mapping mode, then according to the data volume of selected mapping mode and current cache, produce the corresponding expense of adjusting, and send according to described adjustment expense and described mapping mode the laggard row of frame head encapsulation framing with the described business datum of buffer memory, described adjustment expense and generation; Wherein, described mapping mode comprises: asynchronous mapping mode or general mapping mode.
2. the method for claim 1 is characterized in that, also comprises:
According to the speed grade before and after the mapping, select corresponding PT Payload Type, and when described business datum is encapsulated framing, described PT Payload Type is encapsulated in the described frame.
3. mapping device of realizing the optical transfer network business comprises:
Data input module is used for after receiving the condition indicative signal that data map first-in first-out (FIFO) module is sent, and sends to described data map fifo module and writes enable signal;
Described data map fifo module is used for sending described condition indicative signal to described data input module and general mapping block and/or asynchronous mapping module; Be used for receive described write enable signal after, write business datum to be mapped to this module; Also be used for the map type sent according to configuration module, select to read enable signal, read described business datum to be mapped from this module with the corresponding mapping block of described map type is sent;
General mapping block, be used for receiving after light path data cell k (ODUk) becomes the frame head and multi-frame signal that frame module sends, according to the current data quantity stored of described data map fifo module of carrying in the described condition indicative signal that receives, generate and adjust expense and send to described ODUk one-tenth frame module, send to described data map FIFO and read enable signal;
The asynchronous mapping module, be used for receiving after light path data cell k (ODUk) becomes the frame head and multi-frame signal that frame module sends, according to the current data quantity stored of described data map fifo module of carrying in the described condition indicative signal that receives, generate and adjust expense and send to described ODUk one-tenth frame module, send to described data map FIFO and read enable signal;
ODUk becomes frame module, is used to produce frame head and multi-frame signal and sends to the asynchronous mapping module and/or general mapping block; Also be used for the business datum described to be mapped of described data map fifo module output, described frame head, multi-frame signal and with receive with the corresponding adjustment expense encapsulation of described mapping mode framing after export;
Configuration module is used to dispose the mapping mode that is adopted from low rate grade business when two-forty grade business is shone upon, and selects corresponding mapping mode to send to described data map fifo module and described ODUk one-tenth frame module.
4. device as claimed in claim 3 is characterized in that,
Described data map fifo module is used for sending described condition indicative signal to general mapping block or asynchronous mapping module, specifically comprises:
Described data map fifo module is used for the described mapping mode sent according to described configuration module, only sends described condition indicative signal to the mapping block corresponding with described mapping mode.
5. as claim 3 or 4 described devices, it is characterized in that,
Configuration module also is used for becoming frame module with sending to described ODUk with the corresponding PT Payload Type of selecting of mapping mode;
Described ODUk becomes frame module also to be used for described PT Payload Type is encapsulated in described frame.
6. a de-mapping method of realizing the optical transfer network business is applied to two-forty grade business and separates in the process of mapping to low rate grade business, comprising:
The two-forty grade traffic frame that receives is carried out deciding frame, find the frame head of this frame;
Determine to adjust expense according to described frame head;
According to the speed grade of separating the mapping front and back, select to separate mapping mode accordingly, according to selected mapping mode and the described adjustment expense of separating, read low rate grade business datum from the relevant position of described frame then; Wherein, the described mapping mode of separating comprises: asynchronous mapping mode or the working solution mapping mode separated.
7. method as claimed in claim 6 is characterized in that:
If the selected mapping mode of separating is the asynchronous mapping mode of separating, then describedly read low rate grade business datum from the relevant position of described frame according to selected mapping mode and the described adjustment expense of separating, specifically comprise:
Whether whether the position of determining negative justification opportunity byte, positive justification opportunity byte 1 and the positive justification opportunity byte 2 of described two-forty grade traffic frame according to described adjustment expense is data, rule out and carry out read operation on described negative justification opportunity byte, positive justification opportunity byte 1 and positive justification opportunity byte 2.
8. method as claimed in claim 6 is characterized in that:
If the selected mapping mode of separating is the working solution mapping mode, then describedly read low rate grade business datum from the relevant position of described frame according to selected mapping mode and the described adjustment expense of separating, specifically comprise:
If the data that go out payload section according to described adjustment overhead computational are effectively, then from described payload section, read described low rate grade business datum.
9. mapping device of separating of realizing the optical transfer network business comprises:
Light path data cell k (ODUk) separates frame module, and the two-forty grade traffic frame that receives is carried out deciding frame, finds the frame head of this frame; Also be used for determining to adjust expense, and described adjustment expense is sent to asynchronous mapping block and/or the working solution mapping block separated according to described frame head;
Described working solution mapping block is used for separating the condition indicative signal that mapping first-in first-out (FIFO) module is sent according to described adjustment expense that receives and data, produces to write enable signal and send to described data and separates the mapping fifo module;
The described asynchronous mapping block of separating is used for separating the condition indicative signal that the mapping fifo module is sent according to described adjustment expense that receives and data, produces to write enable signal and send to described data and separates the mapping fifo module;
Described data are separated the mapping fifo module, are used for reading module and described working solution mapping block and/or the asynchronous mapping block of separating to data and send described condition indicative signal; Be used for separating map type, select to separate with described that map type is corresponding separates the enable signal of writing that mapping block sends, write described ODUk to this module and separate the described two-forty grade traffic frame that frame module receives according to what configuration module was sent;
Described data outputting module is used for after receiving the condition indicative signal that described data map fifo module is sent, and separates mapping from described data and reads the low rate grade ODUk data of separating after the mapping the fifo module;
Configuration module is used to dispose from what two-forty grade business was adopted when low rate grade business is separated mapping and separates mapping mode, and selects to separate accordingly mapping mode and send to that described data are separated the mapping fifo module and described ODUk separates frame module.
10. device as claimed in claim 9 is characterized in that,
Described data are separated the mapping fifo module and are used for sending described condition indicative signal to general mapping block or asynchronous mapping module, specifically comprise:
Described data are separated the mapping fifo module and are used for the described mapping mode of separating sent according to described configuration module, only to sending described condition indicative signal with the described corresponding mapping block of separating of mapping mode of separating.
11. as claim 9 or 10 described devices, it is characterized in that,
Described ODUk separates frame module and is used for described adjustment expense is sent to asynchronous mapping block and/or the working solution mapping block separated, and specifically comprises:
Described ODUk separates frame module and is used for the described mapping mode of separating sent according to described configuration module, only to sending described adjustment expense with the described corresponding mapping block of separating of mapping mode of separating.
12. device as claimed in claim 9 is characterized in that:
Describedly asynchronously separate mapping and be used for determining according to described adjustment expense whether the position of negative justification opportunity byte, positive justification opportunity byte 1 and the positive justification opportunity byte 2 of described two-forty grade traffic frame is data whether rule out on the position of described negative justification opportunity byte, positive justification opportunity byte 1 and positive justification opportunity byte 2 to produce and write enable signal.
13. device as claimed in claim 9 is characterized in that:
Described working solution mapping mode is used for then producing and writing enable signal accordingly if the data that go out payload section according to described adjustment overhead computational are effectively.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110237438.8A CN102281477B (en) | 2011-08-18 | 2011-08-18 | A kind of method and apparatus for realizing the mapping of OTN business and demapping |
| PCT/CN2012/073447 WO2012155710A1 (en) | 2011-08-18 | 2012-04-01 | Method and device for implementing mapping and demapping of otn service |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110237438.8A CN102281477B (en) | 2011-08-18 | 2011-08-18 | A kind of method and apparatus for realizing the mapping of OTN business and demapping |
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| WO2012155710A1 (en) * | 2011-08-18 | 2012-11-22 | 中兴通讯股份有限公司 | Method and device for implementing mapping and demapping of otn service |
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| CN104540049A (en) * | 2015-02-03 | 2015-04-22 | 国家电网公司 | Method for realizing networking of OTN equipment of different factories |
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| CN107544819A (en) * | 2016-06-29 | 2018-01-05 | 中兴通讯股份有限公司 | It is a kind of for the service implementation method of programming device, device and communication terminal |
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| CN109818705A (en) * | 2017-11-22 | 2019-05-28 | 华为技术有限公司 | It transmits, receive sub- rate signal method and device, equipment |
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| CN104540049A (en) * | 2015-02-03 | 2015-04-22 | 国家电网公司 | Method for realizing networking of OTN equipment of different factories |
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| WO2012155710A1 (en) | 2012-11-22 |
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