CN104410638A - Interpreting device and method for multi-service transmission protocol based on SONET (synchronous optical network) - Google Patents
Interpreting device and method for multi-service transmission protocol based on SONET (synchronous optical network) Download PDFInfo
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- CN104410638A CN104410638A CN201410715135.6A CN201410715135A CN104410638A CN 104410638 A CN104410638 A CN 104410638A CN 201410715135 A CN201410715135 A CN 201410715135A CN 104410638 A CN104410638 A CN 104410638A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- 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
- H04J3/1611—Synchronous digital hierarchy [SDH] or SONET
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/18—Protocol analysers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/03—Protocol definition or specification
Abstract
The invention discloses an interpreting device for a multi-service transmission protocol based on an SONET(synchronous optical network). The interpreting device comprises an optical input terminal, an optical output terminal, a photoelectric receiving unit, a optical fiber branching device, a clock data synchronizing unit, a serial-parallel conversion unit, a PLD (programable logic device) unit, a memory unit, a central processing unit, and protocol interpreting equipment operating protocol interpreting software. The hardware design of the protocol interpreting device is simplified, and the interpreting requirements of the multi-service transmission protocol based on the SONET can be completely met.
Description
Technical field
The present invention relates to digital communication technology field, particularly relate to a kind of multi service transmission protocol based on SONET and understand device and method.
Background technology
For meeting the market requirement, the business that synchronous digital optical networking system (SONET) is transmitted, data, video traffic field is expanded to from traditional speech business, many eurypalynous business can be transmitted by SONET net, as the interconnection of Fast Ethernet (FE), gigabit Ethernet (GE), optical-fibre channel (FC) agreement, optical fiber interconnections (FICON) agreement, business system (ESCON) agreement, digital video broadcasting (DVB) etc., Here it is our usually said multi-service transport.
SONET is the data transmission technology be widely used now, and sonet frame is a rectangular block shape frame structure based on byte structure, and its structure is arranged by 270 × N and 8 bit bytes of 9 row form.From physical layer, sonet signal is exactly the data flow of a serial, and in frame structure, the transmission of byte from left to right, is from top to bottom carried out successively.The rate level of N with SONET is relevant.
Along with adding of new business, traditional SONET encapsulation technology can not be satisfied the demand, emerge relevant with encapsulation in a large number technology, standard, agreement etc., as: Virtual Concatenation (VC), Link Capacity Adjustment Scheme (LCAS), Link Access Procedure (LAPS), High-Level Data Link Control (HDLC), Generic Framing Procedure (GFP).This just needs an instrument, completes relevant agreement and understands, auxiliary development, test process, and may be used for studying different manufacturers, distinct device realize difference, meet the requirement that communication equipment interconnects.
In STM-N, not only there is the net load be transmitted, also have a large amount of overhead bytes.These overhead bytes contain framing information, for safeguarding and the information of performance monitoring and other operation informations.The agreements such as Virtual Concatenation VC, Link Capacity Adjustment Scheme LCAS adopt the H4 byte in Higher Order Path Overhead, the K4 byte transmission of information in low order expense.The agreements such as LAPS, Generic Framing Procedure GFP, are directly at payload area, complete the encapsulation to customer data.To understand these agreements, just must pay close attention to the expense in sonet frame and payload simultaneously.
With regard to the present situation of SONET plug-in reader, be all the deciphering process adopting hardware implementing frame structure substantially, business is processed by the test code streams solution read through model in logic, judges whether the process of receiving and dispatching exists error code; Frame Handler, mapping, demapping extracting section expense, be shown to user by current overhead value; Spending process module in programming device extracts the overhead data in some successive frame, is stored into expense RAM, for query display.Except above-mentioned expense memory function, be all only read the frame data of current time according to each moment substantially, and the information displaying mode out of being correlated with by this Frame process.
The shortcoming of prior art is:
1. existing SONET plug-in reader, the number of bit errors just in display payload, does not show the particular content of payload.User cannot observe payload data, for this agreement completing encapsulation at payload area of LAPS, GFP, cannot understand at all.
2. user can only observe current expense situation, and because sonet frame data are 8000 frames per second, that is the shortest time of data variation is 125 μ s, and human eye cannot catch up with this speed.So adopt this technology, be merely able to adapt to the situation that data variation frequency in frame is lower, be only used to a stable state of facilities for observation in other words.Overhead byte protocol-dependent with MSTP, every frame is all in change substantially, so this technology misses a large amount of detailed information.Even if adopt expense memory function, the information that commercial apparatus stores is also very limited, can only store at most the situation of change of 256 overhead value, for this technology realizing control protocol by overhead byte as physical channel of LCAS, support very limited.
3. the reusability of design is poor.Because whole business solution read procedure all adopts hardware implementing, any change in agreement, whole hardware, logic need all to redesign, and the user interface of software also needs corresponding upgrading, are difficult to the growth requirement that the adaptation communication technology is maked rapid progress.
Summary of the invention
In view of the above-mentioned problems in the prior art, the invention provides a kind of multi service transmission protocol based on SONET and understand device and method, the problem such as solve existing SONET plug-in reader reusability difference and expandability is poor.
According to an embodiment of the invention, provide a kind of multi service transmission protocol solution read apparatus based on SONET, described device comprises the agreement deciphering equipment that light input end, light output end, opto-electronic receiver unit, optical fiber splitter, clock data lock unit, serioparallel exchange unit, PLD unit, internal storage location, central processing unit and operation agreement understand software; Wherein,
Optical fiber splitter, for the light signal inputted from light input end is divided into two ways of optical signals, wherein a road light signal is exported by light output end, and another road light signal is sent to opto-electronic receiver unit; Described light signal carries complete frame data;
Clock data lock unit, is connected with opto-electronic receiver unit, synchronous for carrying out clock data to the signal of telecommunication after the opto-electronic conversion inputted;
Serioparallel exchange unit, for the serial data inputted from clock data lock unit is converted to parallel data, and exports PLD unit to;
PLD unit, for cushioning described parallel data, and in write memory unit; Under central processing unit controls, read the frame data stored in internal storage location and store, then delivering to central processing unit;
Central processing unit, understands equipment connection with described PLD unit and agreement, understands the frame data of the agreement deciphering instruction fetch PLD unit transmission that equipment sends, and deliver to agreement deciphering equipment according to agreement;
Agreement understands equipment, sends agreement understand instruction to central processing unit; Receive the frame data of central processing unit transmission, understand software by the agreement that this agreement deciphering equipment runs, according to protocol type, agreement deciphering is carried out to described frame data.
According to the preferred embodiment of the present invention, described PLD unit comprises cell fifo, internal storage location interface unit and central processing unit interface unit; Wherein,
Cell fifo, is connected with serioparallel exchange unit and internal storage location interface unit, and the frame data for being inputted by serioparallel exchange unit carry out cushioning and transfer to internal storage location by internal storage location interface unit; For being stored by the frame data in the internal storage location read by internal storage location interface unit, and transfer to central processing unit interface unit;
Central processing unit interface unit, is connected with cell fifo and described central processing unit, receives the frame data of cell fifo transmission, and transfers to central processing unit.
According to the preferred embodiment of the present invention, described central processing unit comprises network interface, and described central processing unit understands equipment connection by this network interface and described agreement.
Execution mode according to another preferred, additionally provides a kind of multi service transmission protocol deciphering method based on SONET, comprises step:
Receive the light signal exported from equipment under test, and by optical fiber splitter, the light signal of input is divided into two ways of optical signals, wherein a road light signal is used for exporting, to ensure normal service operation;
Another road light signal is used for agreement and understands, and according to the trigger condition pre-set, is stored in internal storage location by frame data complete for continuous multiple frames relevant in another road light signal in two ways of optical signals;
Understand instruction according to agreement, central processing unit reads the frame data be stored in internal storage location, and delivers to agreement deciphering equipment;
Understand software by the agreement that agreement deciphering equipment runs, according to protocol type, agreement deciphering is carried out to described frame data.
According to the preferred embodiment of the present invention, frame data complete for relevant continuous multiple frames are stored in internal storage location, comprise step:
Another road light signal in described two ways of optical signals is carried out opto-electronic conversion;
The signal of telecommunication after opto-electronic conversion is carried out clock data synchronous;
By carry out clock data synchronous after serial data be converted to parallel data;
By described parallel data after PLD unit buffering, write in described internal storage location.
According to the preferred embodiment of the present invention, frame data complete for relevant continuous multiple frames are stored in internal storage location, comprise step:
Another road light signal in described two ways of optical signals is carried out opto-electronic conversion;
By the electric signal transmission after opto-electronic conversion to PLD unit, carry out clock data synchronous and by carry out clock data synchronous after serial data be converted to parallel data and parallel data cushioned, then write in described internal storage location.
According to the preferred embodiment of the present invention, described agreement is understood and is comprised:
Extract in frame data payload and expense with understood the value of agreement relevant range;
The frame data that continuous display multiframe is complete are interior and understood protocol-dependent value, so that understand intuitively.
According to the preferred embodiment of the present invention, described trigger condition and agreement are understood instruction and are set by agreement deciphering equipment.
According to the preferred embodiment of the present invention, described central processing unit reads the frame data be stored in internal storage location, refers to that described central processing unit reads the frame data in internal storage location by PLD unit, comprises step:
PLD unit reads the frame data in internal storage location and stores;
Central processing unit reads the frame data that PLD unit stores.
Beneficial effect of the present invention is, simplifies the hardware designs of agreement solution read apparatus, improves the versatility of hardware components, can meet the deciphering requirement of the multi service transmission protocol based on SONET comprehensively; To emerging agreement, only by upgrade software, just can support, meet the requirement of communication technology fast development in time; Reduce the hardware development cost of agreement solution read apparatus, human cost, construction cycle.
Accompanying drawing explanation
By reading hereafter detailed description of the preferred embodiment, various other advantage and benefit will become cheer and bright for those of ordinary skill in the art.Accompanying drawing only for illustrating the object of preferred implementation, and does not think limitation of the present invention.And in whole accompanying drawing, represent identical parts by identical reference symbol.In the accompanying drawings:
Figure 1 show and understand apparatus structure schematic diagram according to the multi service transmission protocol based on SONET of embodiment of the present invention;
Figure 2 illustrate the multi service transmission protocol deciphering method flow chart based on SONET according to an embodiment of the invention.
Embodiment
Below with reference to accompanying drawings illustrative embodiments of the present disclosure is described in more detail.Although show illustrative embodiments of the present disclosure in accompanying drawing, however should be appreciated that can realize the disclosure in a variety of manners and not should limit by the execution mode of setting forth here.On the contrary, provide these execution modes to be in order to more thoroughly the disclosure can be understood, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
The invention provides a kind of multi service transmission protocol solution read apparatus based on SONET, by High-Speed Hardware, catch frame data in real time, the frame data recording continuous n frame complete are kept in internal storage location, and these frame data comprise complete payload, expense content; Then according to instruction, frame data are transferred to agreement deciphering equipment and carry out off-line type analysis, understand software by the agreement run on agreement deciphering equipment, according to corresponding agreement, agreement deciphering is carried out to described frame data, namely the value of relevant range in payload, expense is extracted, and show the concrete numerical value of n frame continuously, the person of being convenient to operation understands intuitively, to meet the deciphering requirement based on the multi service transmission protocol of SONET.Wherein, catching of frame data can be understood by agreement the trigger condition that equipment pre-sets and carried out, to ensure that the data of catching are significant data; And carrying out off-line type when understanding, is also understand by agreement the frame data stored in the instruction fetch internal storage location that sends of equipment.
According to an embodiment of the invention, as shown in Figure 1, a kind of multi service transmission protocol solution read apparatus based on SONET is disclosed, this device comprises: light input end, light output end, opto-electronic receiver unit, and the agreement that optical fiber splitter, clock data lock unit, serioparallel exchange unit, PLD unit, internal storage location, central processing unit and operation agreement understand software understands equipment; Wherein,
Optical fiber splitter, for the light signal inputted from light input end is divided into two ways of optical signals, wherein a road light signal is exported by light output end, to ensure normal service operation; Another road light signal is sent to opto-electronic receiver unit; Complete frame data are carried in described light signal;
Clock data lock unit, is connected with opto-electronic receiver unit, synchronous for carrying out clock data to the signal of telecommunication after the opto-electronic conversion inputted;
Serioparallel exchange unit, for the serial data inputted from clock data lock unit 33 is converted to parallel data, and exports PLD unit to;
PLD unit, for cushioning described parallel data, and in write memory unit; Under the control of central processor CPU, the frame data stored in reading internal storage location also store, and then deliver to central processor CPU;
Central processor CPU, understands equipment connection with described PLD unit and agreement, understands instruction, read the frame data of PLD unit transmission according to the agreement that agreement deciphering equipment issues, and delivers to agreement deciphering equipment;
Agreement understands equipment, sends agreement understand instruction to central processing unit; Receive the frame data of central processing unit transmission, understand software by the agreement that this agreement deciphering equipment runs, according to protocol type, agreement deciphering is carried out to described frame data.
In present embodiment, adopt optical fiber splitter, its objective is while guarantee equipment under test two-way services are normally run, carry out agreement deciphering.
Described PLD unit is field programmable gate array (FPGA) chip.
Described PLD unit comprises: cell fifo, internal storage location interface unit and central processing unit interface unit; Wherein, cell fifo, is connected with serioparallel exchange unit and internal storage location interface unit, and the frame data for being inputted by serioparallel exchange unit carry out cushioning and transfer to internal storage location by internal storage location interface unit; For being stored by the frame data in the internal storage location read by internal storage location interface unit, and transfer to central processing unit interface unit; Central processing unit interface unit, is connected with data buffering cell fifo and described central processing unit, receives the frame data of data buffering cell fifo transmission, and transfers to central processor CPU.
Described central processing unit comprises a network interface, and described central processing unit understands equipment connection by this network interface and agreement.
As follows according to the workflow of above-mentioned execution mode of the present invention:
First, understand equipment by agreement and the trigger condition of catching frame data is set, as caught frame data in certain circumstances and storing, meaningful to ensure the frame data of catching;
Receive the light signal exported from equipment under test, and by optical fiber splitter, the light signal of input is divided into two ways of optical signals, wherein a road light signal is used for exporting, to ensure normal service operation;
Another road light signal in two ways of optical signals is carried out opto-electronic conversion at opto-electronic receiver unit;
The signal of telecommunication after opto-electronic conversion is carried out clock data at clock data lock unit synchronous;
By carry out clock data synchronous after serial data be parallel data in serioparallel exchange cell translation;
By described parallel data through PLD unit, namely after fpga chip buffering, write in described internal storage location.Wherein, the frame data that this internal storage location captures are the frame data of catching according to the trigger condition preset, meaningful to ensure the frame data of catching.
When understanding Virtual Concatenation VC, Link Capacity Adjustment Scheme LCAS, Link Access Procedure-SDH (Synchronous Digital Hierarchy) LAPS-SONET, High-Level Data Link Control HDLC or Generic Framing Procedure GFP, workflow is:
Deciphering personnel understand equipment by agreement and issue agreement deciphering instruction;
After central processing unit obtains this instruction, from internal storage location, frame data are read by fpga chip, namely first read the data in internal storage location by internal storage location interface unit and be stored in data buffering cell fifo, then these frame data are delivered in agreement deciphering equipment by CUP interface unit, understand software by the agreement run in agreement deciphering equipment and corresponding agreement deciphering is carried out to frame data.
Execution mode according to another preferred, also disclose another multi service transmission protocol solution read apparatus based on SONET, in this embodiment, PLD unit can adopt field programmable gate array (FPGA) chip of band high-speed transceiver stone (SERDES), SERDES itself can complete that clock data is synchronous, serioparallel exchange function, adopts this chip just without the need to adding CDR unit and serioparallel exchange unit in outside.This device comprises: the agreement that light input end, light output end, opto-electronic receiver unit, optical fiber splitter, PLD unit, internal storage location, central processing unit and operation agreement understand software understands equipment; Wherein,
Optical fiber splitter, for the light signal inputted from light input end is divided into two ways of optical signals, wherein a road light signal is exported by light output end, to ensure the carrying out of regular traffic; Another road light signal is sent to opto-electronic receiver unit; Complete frame data are carried in described light signal;
PLD unit, to the signal of telecommunication after the opto-electronic conversion received carry out clock data synchronous and by carry out clock data synchronous after serial data be converted to parallel data and parallel data cushioned, then write in described internal storage location; Under the control of central processing unit, read the frame data stored in internal storage location and store, then delivering to central processing unit;
Central processing unit, understands equipment connection with described PLD unit and agreement, understands the frame data of the agreement deciphering instruction fetch PLD unit transmission that equipment issues, and deliver to agreement deciphering equipment according to agreement;
Agreement understands equipment, sends agreement understand instruction to central processing unit; Receive the frame data of central processing unit transmission, understand software by the agreement that this agreement deciphering equipment runs, according to protocol type, agreement deciphering is carried out to described frame data.
Described PLD unit comprises clock data lock unit, serioparallel exchange unit, data buffering cell fifo, internal storage location interface unit and central processing unit interface unit; Wherein,
Clock data lock unit, is connected with opto-electronic receiver unit, synchronous for carrying out clock data to the signal of telecommunication after the opto-electronic conversion inputted;
Serioparallel exchange unit, for the serial data inputted from clock data lock unit is converted to parallel data, and exports data buffering cell fifo to;
Data buffering cell fifo, is connected with serioparallel exchange unit and internal storage location interface unit, and the frame data for being inputted by serioparallel exchange unit carry out cushioning and transfer to internal storage location by internal storage location interface unit; For being stored by the frame data in the internal storage location read by internal storage location interface unit, and transfer to central processing unit interface unit;
Central processing unit interface unit, is connected with data buffering cell fifo and described central processing unit CUP, receives the frame data of data buffering cell fifo transmission, and transfers to central processing unit.
Central processing unit comprises a network interface, and described central processing unit understands equipment connection by this network interface and agreement.
As follows according to the workflow of above-mentioned execution mode of the present invention:
First, separate reader to be set the trigger condition of catching frame data, as caught frame data in certain circumstances and storing by agreement deciphering equipment;
Receive the light signal exported from equipment under test, and by optical fiber splitter, the light signal of input is divided into two ways of optical signals, wherein a road light signal is used for exporting, to ensure normal service operation;
Another road light signal in two ways of optical signals is carried out opto-electronic conversion at opto-electronic receiver unit;
The signal of telecommunication after opto-electronic conversion is sent to PLD unit, i.e. fpga chip, it is synchronous that the clock data lock unit in this fpga chip carries out clock data; By carry out clock data synchronous after the serioparallel exchange cell translation of serial data in fpga chip be parallel data; By described parallel data after the data buffering cell fifo in fpga chip cushions, write in described internal storage location.Wherein, the frame data that this internal storage location 36 captures are the frame data of catching according to the trigger condition preset, meaningful to ensure the frame data of catching.
When understanding Virtual Concatenation VC, Link Capacity Adjustment Scheme LCAS, Link Access Procedure-SDH (Synchronous Digital Hierarchy) LAPS-SONET, High-Level Data Link Control HDLC or Generic Framing Procedure GFP, workflow is:
Deciphering personnel understand equipment by agreement and issue agreement deciphering instruction;
After central processing unit obtains this instruction, from internal storage location, frame data are read by fpga chip, namely first read the data in internal storage location by internal storage location interface unit and be stored in data buffering cell fifo, then these frame data are delivered in agreement deciphering equipment by CUP interface unit, understand software by the agreement run in agreement deciphering equipment and corresponding agreement deciphering is carried out to frame data.
Present invention also offers a kind of multi service transmission protocol deciphering method based on SONET.In the present invention, the above-mentioned multi service transmission protocol solution read apparatus based on SONET is adopted to realize the method.
Be described in detail to the multi service transmission protocol deciphering method based on SONET of the present invention below, as shown in Figure 2, the method comprising the steps of:
Step 1, is received the light signal exported from equipment under test, and by optical fiber splitter, the light signal of input is divided into two ways of optical signals by light input end, wherein a road light signal is used for exporting, to ensure normal service operation;
Step 2, in two paths of signals, another road is used for agreement deciphering, according to the trigger condition preset, is stored in internal storage location by frame data complete for relevant continuous multiple frames;
Step 3, understand instruction according to agreement, central processing unit reads the frame data be stored in internal storage location, and delivers at agreement deciphering equipment;
Step 4, understands software by the agreement that agreement deciphering equipment runs and carries out agreement deciphering according to protocol type to the frame data stored in internal storage location.
In present embodiment, described PLD unit is field programmable gate array chip, and step 2 can adopt following concrete step:
Another road light signal in described two ways of optical signals is carried out opto-electronic conversion;
Electric signal transmission after opto-electronic conversion is synchronous to carrying out clock data;
By carry out clock data synchronous after serial data be converted to parallel data;
By described parallel data after PLD unit buffering, write in described internal storage location.
Frame data complete for continuous multiple frames entrained by another road light signal in described two ways of optical signals are stored in internal storage location.
In present embodiment, if described PLD unit is the field programmable gate array chip of band high-speed transceiver stone (SERDES), now, step 2 also can adopt following step to complete:
Another road light signal in described two ways of optical signals is carried out opto-electronic conversion;
By the electric signal transmission after opto-electronic conversion to PLD unit, carry out clock data synchronous and by carry out clock data synchronous after serial data be converted to parallel data and parallel data cushioned, then write in described internal storage location.
In present embodiment, in described step 3, described central processing unit reads the frame data be stored in internal storage location, refers to that described central processing unit reads the frame data in internal storage location by PLD unit, comprises step:
PLD unit reads the frame data in internal storage location and stores;
Central processing unit reads the frame data that PLD unit stores.
In present embodiment, in described step 4 to frame data carry out agreement understand refer to extract in frame data payload and expense with understood the value of agreement relevant range, and the frame data that display multiframe is complete are continuously interior and understood protocol-dependent value, with handled easily, person understands intuitively, meets the deciphering requirement based on the multi service transmission protocol of SONET.
In present embodiment, described trigger condition and agreement are understood instruction and are set by agreement deciphering equipment.
In present embodiment, the described frame data complete based on the continuous n frame stored in the multi service transmission protocol solution read apparatus of SONET are SONET SDH (Synchronous Digital Hierarchy) frame data, comprise complete net load and expense content.
The frame number of the frame data that described continuous multiple frames is complete is determined by the memory capacity of service rate and internal storage location.The capacity of amendment internal storage location, can meet the requirement of different business, different frame number.
Concrete protocol type in the present invention can be and encapsulates relevant technology, standard, agreement etc. to SONET.As: Virtual Concatenation VC, Link Capacity Adjustment Scheme LCAS, Link Access Procedure-SDH (Synchronous Digital Hierarchy) LAPS-SHD, High-Level Data Link Control HDLC, Generic Framing Procedure GFP.
The realization that described agreement understands software is relatively more flexible, according to the protocol type understood, can determine the design at interface.
Provided by the invention based in the multi service transmission protocol deciphering method of SONET, the change of agreement itself or when there is new protocol type, only needs change software to relate to, just can meet new demand, support emerging protocol type.By changing capacity and the bandwidth of MSTP agreement solution read apparatus internal storage location, higher service rate can also be supported, larger storage depth.
The above; be only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should described be as the criterion with the protection range of claim.
Claims (9)
1., based on a multi service transmission protocol solution read apparatus of SONET, described device comprises the agreement deciphering equipment that light input end, light output end, opto-electronic receiver unit, optical fiber splitter, clock data lock unit, serioparallel exchange unit, PLD unit, internal storage location, central processing unit and operation agreement understand software; Wherein,
Optical fiber splitter, for the light signal inputted from light input end is divided into two ways of optical signals, wherein a road light signal is exported by light output end, and another road light signal is sent to opto-electronic receiver unit; Described light signal carries complete frame data;
Clock data lock unit, is connected with opto-electronic receiver unit, synchronous for carrying out clock data to the signal of telecommunication after the opto-electronic conversion inputted;
Serioparallel exchange unit, for the serial data inputted from clock data lock unit is converted to parallel data, and exports PLD unit to;
PLD unit, for cushioning described parallel data, and in write memory unit; Under central processing unit controls, read the frame data stored in internal storage location and store, then delivering to central processing unit;
Central processing unit, understands equipment connection with described PLD unit and agreement, understands the frame data of the agreement deciphering instruction fetch PLD unit transmission that equipment sends, and deliver to agreement deciphering equipment according to agreement;
Agreement understands equipment, sends agreement understand instruction to central processing unit; Receive the frame data of central processing unit transmission, understand software by the agreement that this agreement deciphering equipment runs, according to protocol type, agreement deciphering is carried out to described frame data.
2. a device as claimed in claim 1, described PLD unit comprises cell fifo, internal storage location interface unit and central processing unit interface unit; Wherein,
Cell fifo, is connected with serioparallel exchange unit and internal storage location interface unit, and the frame data for being inputted by serioparallel exchange unit carry out cushioning and transfer to internal storage location by internal storage location interface unit; For being stored by the frame data in the internal storage location read by internal storage location interface unit, and transfer to central processing unit interface unit;
Central processing unit interface unit, is connected with cell fifo and described central processing unit, receives the frame data of cell fifo transmission, and transfers to central processing unit.
3. a device as claimed in claim 2, described central processing unit comprises network interface, and described central processing unit understands equipment connection by this network interface and described agreement.
4., as the multi service transmission protocol solution read apparatus based on SONET of claim 1-3 as described in one of them carries on an agreement the method understood, comprise step:
Receive the light signal exported from equipment under test, and by optical fiber splitter, the light signal of input is divided into two ways of optical signals, wherein a road light signal is used for exporting, to ensure normal service operation;
Another road light signal is used for agreement and understands, and according to the trigger condition pre-set, is stored in internal storage location by frame data complete for continuous multiple frames relevant in another road light signal in two ways of optical signals;
Understand instruction according to agreement, central processing unit reads the frame data be stored in internal storage location, and delivers to agreement deciphering equipment;
Understand software by the agreement that agreement deciphering equipment runs, according to protocol type, agreement deciphering is carried out to described frame data.
5. frame data complete for relevant continuous multiple frames are stored in internal storage location, comprise step by a method as claimed in claim 4:
Another road light signal in described two ways of optical signals is carried out opto-electronic conversion;
The signal of telecommunication after opto-electronic conversion is carried out clock data synchronous;
By carry out clock data synchronous after serial data be converted to parallel data;
By described parallel data after PLD unit buffering, write in described internal storage location.
6. frame data complete for relevant continuous multiple frames are stored in internal storage location, comprise step by a method as claimed in claim 4:
Another road light signal in described two ways of optical signals is carried out opto-electronic conversion;
By the electric signal transmission after opto-electronic conversion to PLD unit, carry out clock data synchronous and by carry out clock data synchronous after serial data be converted to parallel data and parallel data cushioned, then write in described internal storage location.
7. a method as claimed in claim 4, described agreement is understood and is comprised:
Extract in frame data payload and expense with understood the value of agreement relevant range;
The frame data that continuous display multiframe is complete are interior and understood protocol-dependent value, so that understand intuitively.
8. a method as claimed in claim 4, described trigger condition and agreement are understood instruction and are set by agreement deciphering equipment.
9. a method as claimed in claim 4, described central processing unit reads the frame data be stored in internal storage location, comprises step:
PLD unit reads the frame data in internal storage location and stores;
Central processing unit reads the frame data that PLD unit stores.
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| US7277447B2 (en) * | 2001-03-30 | 2007-10-02 | Redback Networks Inc. | Onboard RAM based FIFO with pointers to buffer overhead bytes of synchronous payload envelopes in synchronous optical networks |
| CN101304342A (en) * | 2008-06-27 | 2008-11-12 | 电子科技大学 | Enhancement type Ethernet interface apparatus |
| CN102883110A (en) * | 2012-09-19 | 2013-01-16 | 旗瀚科技有限公司 | Video signal switching matrix system and system main board and service daughter board thereof |
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| US7277447B2 (en) * | 2001-03-30 | 2007-10-02 | Redback Networks Inc. | Onboard RAM based FIFO with pointers to buffer overhead bytes of synchronous payload envelopes in synchronous optical networks |
| CN101034509A (en) * | 2007-04-20 | 2007-09-12 | 吉林中软吉大信息技术有限公司 | Experimental device for IPv6 network protocol simulation teaching |
| CN101304342A (en) * | 2008-06-27 | 2008-11-12 | 电子科技大学 | Enhancement type Ethernet interface apparatus |
| CN102883110A (en) * | 2012-09-19 | 2013-01-16 | 旗瀚科技有限公司 | Video signal switching matrix system and system main board and service daughter board thereof |
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