CN101707730B - Optical transport hierarchy node equipment and optical signal transport method - Google Patents
Optical transport hierarchy node equipment and optical signal transport method Download PDFInfo
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- CN101707730B CN101707730B CN 200910211241 CN200910211241A CN101707730B CN 101707730 B CN101707730 B CN 101707730B CN 200910211241 CN200910211241 CN 200910211241 CN 200910211241 A CN200910211241 A CN 200910211241A CN 101707730 B CN101707730 B CN 101707730B
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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
- H04J3/1652—Optical Transport Network [OTN]
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Abstract
The invention relates to OTH (optical transport hierarchy) node equipment based on all-optical cross and an optical signal transport method in the OTH node equipment. The OTH node equipment comprises a crossed array and more than one interface single board. The crossed array comprises a plurality of mated input/output optical ports and any input optical port can be switched to any output optical port, the interface single board is provided with a plurality of mated input/output line optical ports and a plurality of mated input/output local optical ports, and the local optical ports are connected with the crossed array, wherein the interface single board is used for converting inputted line optical signals into local optical signals and then transporting the local optical signals to the crossed array; and the crossed array is used for switching the local optical signals transported by the interface single board into a specific output optical port to output. According to the OTH node equipment and the optical signal transport method, all-optical cross can be realized and all sorts of drawbacks of high-speed signal interconnection in electrical layers are avoided.
Description
Technical field
The present invention relates to the optical transport network field, particularly relate to a kind of method that OTH (Optical Transmission Hierarchy, the optical transport hierarchy) node device that intersects based on full light that is fit in multiple business access situation and light signal in this OTH node device transmit.
Background technology
Along with the fusion of network technology, the development of network more and more is tending towards flattening.Early stage transport network can be decomposed into uses ATM (Asynchronous Transfer Mode, asynchronous transfer mode), Ethernet, SDH (Synchronous Digital Hierarchy, synchronous digital hierarchy) and WDM (WavelengthDivision Multiplexing, wavelength division multiplexing) multiple technologies and many levels.Every kind of technology is applied to different fields, and business is independent scheduling in field separately.Along with the development of technology, the difference in this division of labor is more and more less, and business no longer includes strict data service and the differentiation of telecommunication service, requires a transfer equipment namely can with the access of data service, also can access with telecommunication service.Simultaneously can the finishing service scheduling in the service needed of same end equipment access by Ethernet and SDH, and the technology by WDM directly is loaded on main line and transmits.The OTH node device is exactly a kind of apparatus-form that is derived under SDH and OTN (OpticalTransport Network, optical transfer network) network concept.
The OTH node device has used the concept of SDH stratification, require an equipment under the structure of the network definition of OTN, individual equipment can access the business of the multiple speed types such as ODU0, ODU1, ODU2 (ODUx:x speed grade light path data cell (Optical Channel Data Unit)), can also realize the exchange between the different rates business on arbitrary port on equipment, the business that will come from a node direction can be dispatched to other node direction after through the OTH node device and get on the granularity of minimum other business of ODU0 level.Obviously, such OTH node device must comprise business demultiplexing and multiplexing module and Cross module.At first will be low-grade (for example ODU0 layer) form of service from (for example ODU2 layer) business demultiplexing high-grade on a direction, then carry out the port direction exchange on equipment, if through multiplexing, low-grade business is become high-grade business when needing at last to be sent to next node through high-grade form of service.
Develop on the basis of SDH equipment thinking due to the OTH node device and come, the mode that the equipment of the current OTH of realization node device form all adopts electricity to intersect on the exchange aspect, if this be because by the realization of the said equipment must process step understand, the OTH node device must comprise multiplexing and process demultiplexing.And the multiplexing and demultiplexing of current operation all must be completed on the basis of electricity layer, and the light signal of introducing from transmission lines must be first becomes the signal of telecommunication through the transition form of photoelectricity and realizes later on multiplexing and demultiplexing again.Very intuitively, the later signal of telecommunication of demultiplexing directly carries out electricity and intersects, then the result of intersecting is carried out multiplexing, will reduce like this transfer process of twice photoelectricity.
But because the cross-capacity that will realize is increasing, there are a lot of insurmountable problems in such equipment way of realization.At first, due to the restriction that process in electric territory self, electric territory interleaving techniques did not all have well to break through within the time in recent years, and electricity intersection single-chip crossing maintains on the intersection level of 640G, and very difficult continuation is up walked; Secondly, rising along with cross-capacity, must use a large amount of high speed signals, usually all need all access service are introduced cross unit by the form of backboard, this brings a series of adverse effect, cross capacity upgrade will mean whole equipment from the access board to the cross board just for the wiring of cross unit and the design of complete machine frame and backboard all will all be developed again.In addition, use a large amount of high-speed electrical signals on equipment, the power consumption exponentially level of equipment increases, and itself can't realize that environmental protection do not say, the thermal design of equipment is also very difficult.
Summary of the invention
The invention provides a kind of a kind of method that OTH node device based on full light intersection and light signal transmit, intersect to realize full light, avoided the interconnected all drawbacks of electric floor height speed signal.
A kind of optical transport hierarchy node device provided by the invention comprises, crossed array and more than one interface single plate, described crossed array have a plurality of paired input and output optical ports, and any one input optical port can switch to any one output optical port; Described interface single plate has the circuit optical port of a plurality of paired input and output and the local optical port of a plurality of paired input and output, and described local optical port is connected with described crossed array, wherein,
Interface single plate is used for the circuit light signal of input is converted to local optical signal, then local optical signal is sent to described crossed array;
Described crossed array is used for the local optical signal that described interface single plate transmits is switched to specific output optical port output.
Further, above-mentioned optical transport hierarchy node device has following characteristics: described interface single plate comprises: the first photoelectric conversion unit, signal converter and the second photoelectric conversion unit,
Described the first photoelectric conversion unit is used for the circuit light signal of input is converted to the line electricity signal, then described line electricity signal is outputed to described signal converter;
Described signal converter is used for described line electricity signal is converted to local telecommunication number, then described local telecommunication number is outputed to described the second photoelectric conversion unit;
Described the second photoelectric conversion unit is used for described local telecommunication number is converted to local optical signal, then exports described local optical signal.
Further, above-mentioned optical transport hierarchy node device has following characteristics:
Described crossed array, the local optical signal that also is used for inputting switches to specific output optical port and sends described interface single plate to;
Described interface single plate is exported after also being used for the local optical signal that receives is converted to the circuit light signal.
Further, above-mentioned optical transport hierarchy node device has following characteristics:
Described the second photoelectric conversion unit, the described local optical signal that also is used for receiving are converted to local telecommunication number, then described local telecommunication number are outputed to described signal converter;
Described signal converter also is used for described local telecommunication number is converted to the line electricity signal, then described line electricity signal is outputed to described the 4th photoelectric conversion unit;
Described the first photoelectric conversion unit also is used for described line electricity signal conversion line light signal, then exports described circuit light signal.
Further, above-mentioned optical transport hierarchy node device has following characteristics:
Described crossed array, the local optical signal that also is used for inputting switches to specific output optical port and sends local client devices to.
A kind of method that the present invention also provides light signal to transmit comprises:
The circuit light signal of input is converted to local optical signal;
By crossed array, described local optical signal is dispatched output.
Further, said method has following characteristics: described circuit light signal with input is converted to the local optical signal specific implementation and is:
Change the circuit light signal of input into the line electricity signal, then described line electricity signal is changed into local telecommunication number, then number change described local telecommunication into local optical signal.
A kind of method that the present invention also provides light signal to transmit comprises:
Crossed array is dispatched local optical signal,
After being converted to the circuit light signal, exports local optical signal after scheduling.
Further, said method has following characteristics: the local optical signal after described will the scheduling is converted to circuit light signal specific implementation and is:
Change the local optical signal after scheduling into local telecommunication number, then number change described local telecommunication into the line electricity signal, then change described line electricity signal into the circuit light signal.
To sum up, there is following direct effect in the OTH node device that intersects based on full light provided by the invention:
(1) crossed array realizes that full light intersects, and can not distinguish the speed of scheduling signals, and according to the lifting of scheduling signals minimum speed limit, system's cross-capacity can seamlessly be expanded.
(2) signal transmits and exchanges on the light territory, can directly adopt optical fiber or fiber waveguide to be connected between interface single plate and crossed array, has avoided the interconnected all drawbacks of electric floor height speed signal.
(3) adopt the interleaving techniques of pure light, the power consumption of cross system is almost nil, compares system power dissipation with electricity layer cross system and greatly reduces, and has reduced the cost of equipment operation maintenance.
Description of drawings
Fig. 1 is the schematic diagram according to the OTH node device of the embodiment of the present invention;
Fig. 2 is the application exemplary plot according to the OTH node device of the embodiment of the present invention;
Fig. 3 is the flow chart according to the method for the light signal transmission of the embodiment of the present invention one;
Fig. 4 is the flow chart according to the method for the light signal transmission of the embodiment of the present invention two.
Embodiment
Below in conjunction with drawings and Examples, technical scheme of the present invention is described in detail.
Fig. 1 is the schematic diagram according to the OTH node device of the embodiment of the present invention, and as shown in Figure 1, the OTH node device of the present embodiment comprises a crossed array (as the pure smooth crossed array 100 in Fig. 1) and a series of interface single plate 200
1To interface single plate 200
nWherein, pure smooth crossed array 100 has N the optical port 101 of input and output in pairs, and the light signal of any one input optical port input can switch to any one output optical port, to realize the business scheduling.Each interface single plate has I the paired local optical port 205 of circuit optical port 201, a J input and output of input and output, signal converter 203 and photoelectric conversion unit 202 and 204 in pairs, is respectively used to realize that the circuit light signal is to the conversion between (client) light signal of this locality.The wherein traffic carrying capacity of the selective basis local scheduling of I, J, N, n quantity, line input signal speed and need the smallest particles degree of dispatching services to select.
Fig. 2 has provided an OTH node device that typically intersects based on full light according to the application exemplary plot of the OTH node device of the embodiment of the present invention.This OTH node device has the cross-capacity of minimum 1024G*1024G, the minimum scheduling that allows to realize GE (Gigabit Ethernet, gigabit Ethernet) business, and therefore getting N equals 1024.This OTH node device comprises two kinds of interface single plates, a kind of interface single plate is used for realizing circuit OTU2 (Optical transmission unit of level 2, optical transport unit grade 2) signal is to the conversion (in figure, interface single plate 1) between local GE signal, a kind ofly realize the conversion (in figure interface single plate 2) of circuit OTU2 signal between local STM (Synchronous Transfer Mode, synchronous transfer module) 16 signals for interface single plate.To the interface single plate (in figure, interface single plate 1) of GE signal, 1 circuit optical port (corresponding I is arranged for the OTU2 signal
1=1), consider in practical application usually 8 road GE signal assembles in 1 road OTU2 signal, therefore corresponding have 8 local optical port (corresponding J
1=8).To the interface single plate (in figure, interface single plate 2) of STM16 signal, 2 circuit optical port (corresponding I are arranged for the OTU2 signal
2=2), consider in practical application usually 4 road STM16 signal assembles in 1 road OTU2 signal, therefore corresponding also have 8 local optical port (corresponding J
2=8).N optical interface on pure smooth crossed array 100 directly is connected by optical fiber with the local optical port of local client devices or interface single plate, as dotted portion in figure.
Interface single plate can also have other kind except above-mentioned two kinds, for example be used for realizing that circuit OUT k signal is to the interface single plate of the conversion between local GE signal, be used for realizing that circuit OUT k signal arrives the interface single plate of the conversion between local STM k signal etc., and be not limited to this.
Do not provide the size of the quantity n of interface single plate in figure, this numerical value can be configured in local actual traffic carrying capacity according to the OTH node device, for example: if local actual track input OTU2 signal is 1024G, wherein the GE business is 512G, the STM16 signal service is 512G, the bandwidth needs according to GE signal and STM16 signal use 512/8 OTU2 to the interface single plate 1 of changing between the GE signal, need to use 512/8/2 OTU2 to the interface single plate 2 of changing between the STM16 signal, be altogether 96 interface single plates, so n is 96.In actual applications, adopt above-mentioned interface single plate and configuration, with after the optical port of pure smooth crossed array is connected, pure smooth crossed array also will keep the access that 256 optical ports are used for the native client business with the local optical port of total interface veneer.
In the implementation procedure of the OTH node device in Fig. 2, interface single plate (200
1To 200
n) in photoelectric conversion unit 202 can use conventional 10G optical module, each optical port uses a 10G optical module, corresponding interface veneer 1 uses 1 the type optical module, corresponding interface veneer 2 uses two the type optical modules.Interface single plate (200
1To 200
n) in photoelectric conversion unit 204 can use conventional 1G or 2.5G optical module (according to the bandwidth of local optical signal, if the GE signal, to use the optical module of 1G; If the STM16 signal uses the 2.5G optical module), each optical port uses an optical module, and each interface single plate uses 8 such optical modules.Interface single plate (200
1To 200
n) in 203 of signal converters adopt IC chip ripe on market to get final product.
The below introduces the method for the light signal transmission of the embodiment of the present invention one, as shown in Figure 3, comprises step:
S31, with the input the circuit light signal be converted to local optical signal;
S32, by crossed array, described local optical signal is dispatched output.
Two kinds of situations below the transport process of the light signal in the OTH node device that intersects based on full light in the present embodiment can comprise:
Road client signal in a, circuit light signal to another circuit output, comprises following step at local scheduling:
(1) first become the line electricity signal through a photoelectric conversion unit after circuit input optical port on the circuit light signal input interface veneer of high speed, then the line electricity signal of signal converter after with all conversions is converted to local telecommunication number, and another photoelectric conversion unit number changes local telecommunication into local optical signal and outputs to pure smooth crossed array at last;
(2) pure smooth crossed array is crossed to the output optical port of determining that is connected with the interface single plate of outlet line according to the local optical signal that will input optical port to the dispatching requirement of business;
(3) interface single plate of outlet line receives from first carrying out opto-electronic conversion after the local optical signal of pure smooth crossed array and becomes local telecommunication number, then the local telecommunication of signal converter after with all conversions number is converted to the line electricity signal, and last photoelectric conversion unit becomes the output of circuit optical signals circuit optical port with the line electricity signal.
Road client signal in b, circuit light signal comprises following step on this underground road:
(1) first become the line electricity signal through a photoelectric conversion unit after circuit input optical port on the circuit light signal input interface veneer of high speed, then the line electricity signal of signal converter after with all conversions is converted to local telecommunication number, and another photoelectric conversion unit number changes local telecommunication into local optical signal and outputs to pure smooth crossed array at last;
(2) pure smooth crossed array is crossed to the output optical port that is connected with this underground road customer equipment according to the local optical signal that will input optical port to the dispatching requirement of business.
The below introduces the method for the light signal transmission of the embodiment of the present invention two, as shown in Figure 4, comprises step:
S41, crossed array are dispatched local optical signal;
S42, the local optical signal after dispatching are exported after being converted to the circuit light signal.
Situation below the transport process of the light signal in the OTH node device that intersects based on full light in the present embodiment can comprise:
The light signal of c, local client devices comprises following step by the circuit optical port output of setting out on a journey of OTH node device:
(1) light signal of customer equipment output is connected to the input optical port of pure smooth crossed array;
(2) pure smooth crossed array is crossed to according to the local optical signal that will input optical port to the dispatching requirement of business the definite output optical port that is connected with the interface single plate of outlet line;
(3) interface single plate of outlet line receives from first carrying out opto-electronic conversion after the local optical signal of pure smooth crossed array and becomes local telecommunication number, then the local telecommunication of signal converter after with all conversions number is converted to the line electricity signal, and last photoelectric conversion unit becomes the output of circuit optical signals circuit optical port with the line electricity signal.
Also comprise in actual applications the situation that local optical signal is dispatched to another local device, as follows:
The light signal of d, local a certain customer equipment need to be as follows to the process of another customer equipment at local scheduling:
(1) light signal of customer equipment output is connected to the input optical port of pure smooth crossed array;
(2) pure smooth crossed array is crossed to the output optical port that is connected with this underground road customer equipment according to the light signal that will input optical port to the dispatching requirement of business.
The below illustrates the transport process of light signal in above-mentioned four kinds of situations with typical OTH node device shown in Figure 2.
Suppose, remote equipment will need the circuit light signal of GE business scheduling to be dispatched to local OUT2 signal to the OUT2 input optical port of the interface single plate A of GE signal conversion, and local GE customer equipment has been connected to a plurality of optical ports of pure smooth crossed array.The interface single plate A that local OUT2 signal is changed to the GE signal first is converted to signal 8 road GE signals after receiving the OUT2 signal that remote equipment passes over, and all 8 road GE signals is input to 8 defeated light inlets of pure smooth crossed array 100.
One, the GE signal demand of far-end is dispatched to another remote equipment;
This remote equipment is connected by the OTU2 circuit optical port of OUT2 signal with local another interface single plate B.Pure smooth crossed array 100 is set will be crossed to the input optical port that interface single plate A is connected the output optical port that is connected with the local optical port of interface single plate B.After the GE signal intersects by pure smooth crossed array 100, then be delivered to interface single plate B through optical fiber transmission.Interface single plate B is converted to one road OTU2 signal with 8 road GE signals that all come from pure smooth crossed array, and sends to remote equipment by the circuit optical port.
Two, the GE signal demand of far-end is on this underground road;
The input optical port that pure smooth crossed array 100 will be connected with interface single plate A is set is crossed to the output optical port that is connected with local GE equipment.The GE signal is by after intersecting, then connection is directly delivered to local client devices through optical fiber.
Three, the signal demand of local GE customer equipment sends to remote equipment;
Suppose that this remote equipment is connected by the OTU2 circuit optical port of OTU2 signal with a local interface single plate C.Pure smooth crossed array 100 is set will be crossed to the input optical port that local GE equipment is connected the output port that is connected with the local optical port of interface single plate C.The GE signal is by after intersecting, then the process optical fiber transmission is delivered to interface single plate C.Interface single plate C is converted to one road OTU2 signal with 8 road GE signals that all come from pure smooth crossed array, and sends to remote equipment by the circuit optical port.
Four, the signal demand as local GE customer equipment D is directly delivered to local GE customer equipment E in this locality;
The input optical port that pure smooth crossed array 100 will be connected with customer equipment D is set is crossed to the output optical port that is connected with customer equipment E, the light signal that sends from customer equipment D is directly delivered to customer equipment E after by pure smooth crossed array 100.
These are only a kind of specific embodiment of the present invention; certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (9)
1. optical transport hierarchy node device, it is characterized in that, comprise, pure smooth crossed array and more than one interface single plate, described pure smooth crossed array has N paired input and output optical port, and any one input optical port can switch to any one output optical port; Described interface single plate is n, each interface single plate has I circuit optical port and the individual local optical port of input and output in pairs of J of input and output in pairs, described local optical port is connected with described pure smooth crossed array, wherein the value of I, J, N, n is selected according to the smallest particles degree of traffic carrying capacity, line input signal speed and the needs dispatching services of local scheduling
Interface single plate is used for the circuit light signal of input is converted to local optical signal, then local optical signal is sent to described pure smooth crossed array;
Described pure smooth crossed array is used for the local optical signal that described interface single plate transmits is switched to specific output optical port output.
2. optical transport hierarchy node device as claimed in claim 1, it is characterized in that: described interface single plate comprises: the first photoelectric conversion unit, signal converter and the second photoelectric conversion unit,
Described the first photoelectric conversion unit is used for the circuit light signal of input is converted to the line electricity signal, then described line electricity signal is outputed to described signal converter;
Described signal converter is used for described line electricity signal is converted to local telecommunication number, then described local telecommunication number is outputed to described the second photoelectric conversion unit;
Described the second photoelectric conversion unit is used for described local telecommunication number is converted to local optical signal, then exports described local optical signal.
3. optical transport hierarchy node device as claimed in claim 2 is characterized in that:
Described pure smooth crossed array, the local optical signal that also is used for inputting switches to specific output optical port and sends described interface single plate to;
Described interface single plate is exported after also being used for the local optical signal that receives is converted to the circuit light signal.
4. optical transport hierarchy node device as claimed in claim 3 is characterized in that:
Described the second photoelectric conversion unit, the described local optical signal that also is used for receiving are converted to local telecommunication number, then described local telecommunication number are outputed to described signal converter;
Described signal converter also is used for described local telecommunication number is converted to the line electricity signal, then described line electricity signal is outputed to described the first photoelectric conversion unit;
Described the first photoelectric conversion unit also is used for described line electricity signal is converted to the circuit light signal, then exports described circuit light signal.
5. optical transport hierarchy node device as described in claim 1 to 4 any one is characterized in that:
Described pure smooth crossed array, the local optical signal that also is used for inputting switches to specific output optical port and sends local client devices to.
6. one kind is adopted the method for the light signal transmission of optical transport hierarchy node device as claimed in claim 1, it is characterized in that, comprising:
The circuit light signal of input is converted to local optical signal;
By pure smooth crossed array, described local optical signal is dispatched output.
7. method as claimed in claim 6 is characterized in that: described circuit light signal with input is converted to the local optical signal specific implementation and is:
Change the circuit light signal of input into the line electricity signal, then described line electricity signal is changed into local telecommunication number, then number change described local telecommunication into local optical signal.
8. one kind is adopted the method for the light signal transmission of optical transport hierarchy node device as claimed in claim 1, it is characterized in that, comprising:
Pure smooth crossed array is dispatched local optical signal,
After being converted to the circuit light signal, exports local optical signal after scheduling.
9. method as claimed in claim 8, it is characterized in that: the local optical signal after described will the scheduling is converted to circuit light signal specific implementation and is:
Change the local optical signal after scheduling into local telecommunication number, then number change described local telecommunication into the line electricity signal, then change described line electricity signal into the circuit light signal.
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| CN 200910211241 CN101707730B (en) | 2009-11-05 | 2009-11-05 | Optical transport hierarchy node equipment and optical signal transport method |
| PCT/CN2010/076619 WO2011054237A1 (en) | 2009-11-05 | 2010-09-03 | Node device for optical transmission system and method for transmitting optical signals |
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| CN102316026B (en) * | 2011-08-15 | 2017-02-01 | 中兴通讯股份有限公司 | Universal service processing single board and single board configuration method |
| CN106899348A (en) * | 2017-01-22 | 2017-06-27 | 烽火通信科技股份有限公司 | A kind of optical signal transmission method and system |
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| JP2006352297A (en) * | 2005-06-14 | 2006-12-28 | Hitachi Communication Technologies Ltd | Switching node |
| CN1917714A (en) * | 2006-07-14 | 2007-02-21 | 清华大学 | Method for connecting antenna to signal process unit by exchange unit, and the exchange unit |
| CN101146240A (en) * | 2007-09-19 | 2008-03-19 | 中兴通讯股份有限公司 | A distributed crossed device for share bus |
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| JP2006352297A (en) * | 2005-06-14 | 2006-12-28 | Hitachi Communication Technologies Ltd | Switching node |
| CN1917714A (en) * | 2006-07-14 | 2007-02-21 | 清华大学 | Method for connecting antenna to signal process unit by exchange unit, and the exchange unit |
| CN101146240A (en) * | 2007-09-19 | 2008-03-19 | 中兴通讯股份有限公司 | A distributed crossed device for share bus |
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| 全光传送网的光交叉连接节点的结构分析;罗启彬等;《电子科技大学学报》;20010831(第04期);第347页第2节-第349页第5节 * |
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