CN101026427B - Device and method for realizing multi-channel low-speed signal and one-channel high speed signal two-way conversion - Google Patents
Device and method for realizing multi-channel low-speed signal and one-channel high speed signal two-way conversion Download PDFInfo
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Abstract
The device includes at least one low speed signal conversion unit, at least one low speed signal packaging / depackaging unit, a simple multiplexing / demultiplexing unit for signal, a high-speed signal conversion unit. Using the device carries out asynchronous mapped FEC data packaging on the low speed signal directly accorded with G.709 standard, based on local clock. The method carries out simple inter insertion on already synchronous FEC digital packaged multiple low speed signals so as to obtain a high-speed signal. At receiving end, corresponding demultiplexing process and depackaging process are carried out to obtain low speed source signals. The invention reduces a step of pointer process so as to lower complexity of optical transmission system, and also reduce cost of device.
Description
Technical field
The present invention relates to the high-speed light transmission field, relate in particular to the device and method of realizing multi-path low speed signal and one road high speed signal bi-directional conversion.
Background technology
In recent years, along with the demand of communications market to bandwidth, high-speed optical transmission system list wavelength bit rate becomes more and more higher, from 2.5G to 10G, from 10G again to 40G.SDH (synchronous digital hierarchy, Synchronous Digital Hierarchy) system provide a whole set of complete from low-rate signal to two-forty signal multiplexing (converging) and two-forty method to the low rate demultiplexing.Briefly, utilize the pointer adjustment to absorb tolerance at transmitting terminal exactly and fall bit rate difference between the low speed signal of several not homologies, add the multiplexing data frame structure that becomes a high speed behind the suitable overhead byte.Receive accordingly according to the pointer value that receives at receiving terminal.
Simultaneously, in order to add longer transmission distance and to improve transmission reliability, packaged SDH frame signal is used FEC (Forward Error Correction, forward error correction) technology, and the FEC digital wrapper technology of the current ITU.T.G.709 of meeting standard uses more and more widely.The ITU.T.G.709 standard pin has also been stipulated corresponding frame structure to the encapsulating structure of FEC, i.e. OTU (N).This frame structure the inside has stipulated that equally also a pointer supports the function of asynchronous mapping.
That is to say that existing occupation mode is to carry out SDH multiplexing earlier, then FEC seals, and double-layer structure respectively carries pointer, independently handles separately.
Summary of the invention
Technical problem to be solved by this invention is, a kind of device and method of realizing multi-path low speed signal and one road high speed signal bi-directional conversion is provided, in big capacity SDH equipment, realize 4 not the low speed signal of homology be multiplexed with one road high speed signal and corresponding inverse demultiplexed thereof, and solve high speed signal carried out the problem that the FEC encoding and decoding are handled.
The invention provides a kind of device of realizing multi-path low speed signal and one road high speed signal bi-directional conversion, the emitting side that is used at high speed optical communication system is one road high speed signal with the multi-path low speed signal gathering, or one road high speed signal is decomposed into the multi-path low speed signal at the receiver side of high speed optical communication system, its characteristics are, comprising:
At least one low speed signal converting unit, be used for when the multi-path low speed signal gathering is one road high speed signal, at least one road low speed signal is carried out light/electric conversion and interface conversion, or when one road high speed signal is decomposed into the multi-path low speed signal, carry out being sent to the low speed transmissions circuit after electricity/light conversion and the interface conversion with unpacking at least one road low speed signal of being honored as a queen;
At least one low speed signal is sealed/is separated and seals the unit, be used for when the multi-path low speed signal gathering is one road high speed signal, to carry out the forward error correction digital wrapper through this road low speed signal after the conversion of low speed signal converting unit, or when one road high speed signal is decomposed into the multi-path low speed signal, at least one road low speed signal behind the simple demultiplexing is carried out the forward error correction digital solution seal;
The simple multiplex/demultiplex of a signal unit, be used for when the multi-path low speed signal gathering is one road high speed signal, multi-path low speed signal after sealing simply is multiplexed with one road high speed signal, or when one road high speed signal is decomposed into the multi-path low speed signal, with the simple demultiplexing of road high speed signal after electricity/light conversion and the interface conversion is the multi-path low speed signal, and described low speed signal is sealed/separated and seals the unit and according to the asynchronous mapping mode of local clock G.709 the low speed signal of input and high speed signal met the forward error correction digital wrapper of standard/separate and seal;
A high speed signal converting unit, be used for when the multi-path low speed signal gathering is one road high speed signal, road high speed signal after simple multiplexing is carried out being sent to the high-speed transfer circuit after electricity/light conversion and the interface conversion, or when one road high speed signal is decomposed into the multi-path low speed signal, one road high speed signal is carried out light/electric conversion and interface conversion.
Described low speed signal converting unit comprises:
Light/electric varitron unit is used for when the multi-path low speed signal gathering is one road high speed signal, and input is carried out light/electric conversion from one road low speed signal of low speed line;
The first interface conversion subelement is used for when the multi-path low speed signal gathering is one road high speed signal, and this road low speed signal after light/electric conversion is carried out interface conversion, and the low speed signal after the interface conversion is delivered to low speed signal and seal/separate seal the unit;
The second interface conversion subelement is used for when one road high speed signal is decomposed into the multi-path low speed signal, seals the low speed signal that unpacking of unit be honored as a queen and carries out interface conversion sealing from low speed signal/separating;
Electricity/light varitron unit is used for when one road high speed signal is decomposed into the multi-path low speed signal, and this road low speed signal after the docking port conversion carries out electricity/light conversion, and this road low speed signal after electricity/light conversion is delivered to the low speed transmissions circuit.
The simple multiplex/demultiplex of described signal unit comprises:
The simple multiplexing subelement of low speed signal is used for when the multi-path low speed signal gathering is one road high speed signal, low speed signal is sealed/separated to seal the low speed signal that unit pack is honored as a queen and simply be multiplexed with one road high speed signal;
The simple demultiplexing subelement of high speed signal is used for when one road high speed signal is decomposed into the multi-path low speed signal, and it is the multi-path low speed signal that the road high speed signal of sending here after the conversion of high speed signal converting unit is carried out simple demultiplexing.
Described high speed signal converting unit comprises:
The first interface conversion subelement is used for when the multi-path low speed signal gathering is one road high speed signal, to carrying out interface conversion from the high speed signal after the simple multiplexing subelement of low speed signal simple multiplexing;
Electricity/light varitron unit is used for when the multi-path low speed signal gathering is one road high speed signal, and this road high speed signal after the docking port conversion carries out electricity/light conversion, and this road high speed signal after electricity/light conversion is delivered to the high-speed transfer circuit;
Light/electric varitron unit is used for when one road high speed signal is decomposed into the multi-path low speed signal, and the road high speed signal of importing is carried out light/electric conversion;
The first interface conversion subelement is used for when one road high speed signal is decomposed into the multi-path low speed signal, and the high speed signal after light/electric conversion is carried out interface conversion, and the high speed signal after the interface conversion is delivered to the simple demultiplexing subelement of high speed signal.
The simple multiplex/demultiplex of described signal unit, when the multi-path low speed signal gathering is one road high speed signal, carries out simple multiplexing mode to the low speed signal after sealing and comprise:
Directly interleave;
The signal of several low speed is made band directly to be interleave after the internal labeling;
After directly interleaving back reservation one road synchronous head, thereby use scrambler that all data scramblings except this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure above the two-forty.
The simple multiplex/demultiplex of described signal unit, when one road high speed signal was decomposed into the multi-path low speed signal, the mode of high speed signal being carried out simple demultiplexing comprised:
Directly separate and interleave;
Directly separating to interleave then is with internal labeling to do distribution according to high speed signal accordingly;
Carry out frame synchronization, descrambling according to the synchronous head that keeps, then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
It is the method for one road high speed signal that the present invention also provides a kind of multi-path low speed signal gathering of realizing, the emitting side that is used at high speed optical communication system is one road high speed signal with the multi-path low speed signal gathering, and its characteristics are, comprise the steps:
(1) will be through at least one road low speed signal after light/electric conversion and the interface conversion, carry out being met the G.709 forward error correction digital wrapper of standard based on what the asynchronous mapping mode of local clock did;
(2) the multi-path low speed signal after will sealing simply is multiplexed with one road high speed signal;
(3) will carry out exporting the high-speed transfer circuit to after interface conversion and electricity/light conversion through this road high speed signal after simple multiplexing.
In the described step (2) the multi-path low speed signal being carried out simple multiplexing mode comprises:
Only directly interleave;
Or several low speed signals are made band directly to be interleave after the internal labeling;
Or after directly interleaving back reservation one road synchronous head, thereby utilize scrambler that all data scramblings except that this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure of telling above the rate.
The present invention also provides a kind of one road high speed signal of realizing to be decomposed into the method for multi-path low speed signal, is used at the receiver side of high speed optical communication system one road high speed signal being decomposed into the multi-path low speed signal, and its characteristics are, comprise the steps:
(1) with the road high speed signal that received after light/electric conversion and interface conversion, carrying out simple demultiplexing is at least one road low speed signal;
(2), carry out sealing based on the forward error correction digital solution of standard that meets G.709 that the asynchronous mapping mode of local clock is done at least one road low speed signal behind the simple demultiplexing;
(3) will unpack at least one road low speed signal of being honored as a queen after carrying out electricity/light conversion and interface conversion, export the low speed transmissions circuit to.
In the described step (1) one road high speed signal being carried out simple demultiplexing mode comprises:
Directly separate and interleave;
Or directly separate to interleave afterwards and do distribution according to corresponding high speed signal band internal labeling;
Or carry out frame synchronization, descrambling according to the synchronous head that keeps in the high speed signal, then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
The present invention has changed the mode of changing mutually between multi-path low speed signal and one road high speed signal, different with method described in the background technology is, the present invention at first cancelled on the SDH aspect from low rate multiplexing to two-forty, but directly on low rate, meet the G.709 digital wrapper of standard, utilize pointer that OTU (N) structure the inside contains to carry out asynchronous mapping based on local clock for the signal of a plurality of not homologies.Like this, a plurality of low speed signals have just realized synchronously and the FEC digital wrapper simultaneously, next, again to synchronously and a plurality of low speed signals of FEC digital wrapper simply interleave and just can obtain a high speed signal.Do corresponding demultiplexing and handle and separate to seal to handle and just can obtain the low speed source signal accepting side.
The present invention has reduced by a link that pointer is handled, thereby has reduced the complexity of optical transmission system, has also reduced equipment cost certainly.
Description of drawings
Fig. 1 is according to the realization multi-path low speed signal of the embodiment of the invention and the schematic diagram of device of one road high speed signal bi-directional conversion;
Fig. 2 is that the realization multi-path low speed signal gathering according to the embodiment of the invention is the flow chart of one road high speed signal;
Fig. 3 is the flow chart that is decomposed into the multi-path low speed signal according to realization one road high speed signal of the embodiment of the invention;
Fig. 4 is 4 STM64 signals and the theory diagram that the 40G signal is changed mutually according to the embodiment of the invention;
Fig. 5 is 4 STM16 signals and the theory diagram that the 10G signal is changed mutually according to the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment of the present invention the present invention is described in further detail.
As shown in Figure 1, be a kind of theory diagram of realizing the device of multi-path low speed signal and one road high speed signal bi-directional conversion of the present invention.Be respectively from left to right among Fig. 1:
First, 1,2,3,4 is light/electricity, the electricity/light conversion and the interface conversion unit of low-rate signal; Wherein:
11,21,31,41: light/electric conversion (O/E),
12,14,22,24,32,34,42,44: interface conversion,
13,23,33,43: electricity/light conversion (E/O);
Second portion, 51,52,53,54: be forward error correction (FEC) digital wrapper of low speed signal/separate and seal unit (meet G.709 standard, adopt asynchronous mapping);
Third part, 61,62: be the demultiplexing unit of simply multiplexing/one road high speed signal of several roads low speed signal, wherein:
61: the simple multiplexing subelement of several roads low speed signal,
The demultiplexing subelement of 62: one road high speed signals;
The 4th part, 7: be light/electricity, the electricity/light conversion and the interface conversion unit of two-forty signal, wherein:
71: light/electric conversion (O/E),
72,74: interface conversion unit,
73: electricity/light conversion (E/O).
Input/output signal among Fig. 1 between each part is expressed as follows respectively:
I1: low rate SDH light input;
O1: low rate SDH light output;
I7: two-forty light signal input;
O7: two-forty light signal output;
T: the two-forty parallel signal that is used to send;
T11: the low rate parallel signal that is used to send (SDH structure);
T12: the low rate parallel signal that is used to send (G.709 digital wrapper structure);
R: the two-forty parallel signal that is used to receive;
R11: the low rate parallel signal that is used to receive (SDH structure);
R12: the low rate parallel signal that is used to receive (G.709 digital wrapper structure);
Clk: local clock.
In Fig. 1, so-called low-rate signal is exactly introduce to prepare to converge the tributary signal that becomes high rate data transmission, and the two-forty signal is exactly to converge several low speed tributary signals and the main line signal that generates by the present invention.For example adopt the STM16 of 4 branch roads to converge when becoming the 10G speed rates, 2.5G is exactly a low-rate signal, and the 10G signal is exactly the two-forty signal.In like manner, converge 4 STM64 when becoming the transmission of 40G signal, 10G is exactly a low-rate signal, and the 40G signal is exactly the two-forty signal.
In Fig. 1, for transmitter side, the low rate not light signal input i1 (i2/i3/i4) of homology becomes the signal of telecommunication through unit 11 (21/31/41), then become the electrical interface signals that unit 51 (52/53/54) can be handled through unit 12 (22/32/42), 51 (52/53/54) locate to finish at transmitter side and meet the G.709 FEC digital wrapper of standard for several low speed signals based on local clock in the unit.When carrying out this step, use local clock clk to carry out the G.709 asynchronous mapping of defined, so just homogeneity FEC time the on the low speed signal band of several not homologies.Subsequently, in the unit 61 carried out be to several (they generally being 4) the signal sealed of digital packets simply divide slottingly, become a high speed signal.As mentioned above, so-called simple branch is inserted in and refers to three kinds of modes among the present invention, that is:
Simply interleave;
The SDH signal of several low rates is made band simply to be interleave after the internal labeling;
After simply interleaving back reservation one road synchronous head, thereby use scrambler that all data scramblings except this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure above the two-forty.
During practical application, can in three kinds of modes, select a kind of use.Unit 61 output just be to have converged the signal of telecommunication that forms.Then transform through the parallel/serial interface conversion of unit 74 and the E/O of unit 73, the light signal of a high speed generates with regard to o7, can transmit.
Corresponding with transmitter side similarly, corresponding with transmitter side when device of the present invention is applied to receiver side, in Fig. 1.The light signal i7 of a two-forty enters this device, sends into unit 62 through the O/E conversion of unit 71 and the serial/parallel interface conversion of unit 74.62 pairs of these high speed signals in unit carry out simple demultiplexing, restore the digital wrapper frame of several low rates.Also to select the suitable slotting mode of branch of separating herein corresponding to three kinds of simple add drop multiplex modes of transmitter side, be respectively:
Simply separate and interleave;
Simply separating to interleave afterwards is with internal labeling to do distribution according to corresponding SDH;
Carry out frame synchronization according to the synchronous head that keeps, descrambling is then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
Then 51 (52/53/54) locate, several digital wrapper frames are handled, adopt the asynchronous mapping mode equally, restore branch road information according to standard G.709 in the unit.Transforming through the parallel/serial conversion of unit 14 (24/34/44) and the E/O of unit 13 (23/33/43) then, source information is just reduced.
As shown in Figure 2, further, the present invention also provides and realizes that the multi-path low speed signal gathering is the method for one road high speed signal, and the emitting side that is used at high speed optical communication system is one road high speed signal with the multi-path low speed signal gathering, comprises the steps:
Step 201: will carry out the forward error correction digital wrapper through at least one road low speed signal after light/electric conversion and the interface conversion (generally being 4 the tunnel);
Step 202: the multi-path low speed signal after will sealing simply is multiplexed with one road high speed signal;
Step 203: will carry out exporting the high-speed transfer circuit to after interface conversion and electricity/light conversion through this road high speed signal after simple multiplexing.
Wherein, carry out the step of forward error correction digital wrapper in the described step 201, be based on the G.709 forward error correction digital wrapper of standard that meets that the asynchronous mapping mode of local clock done.
Wherein, in the described step 202 the multi-path low speed signal being carried out simple multiplexing mode comprises:
Only directly interleave;
Or several low speed signals are made band directly to be interleave after the internal labeling;
Or after directly interleaving back reservation one road synchronous head, thereby utilize scrambler that all data scramblings except that this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure of telling above the rate.
As shown in Figure 3, further, the present invention also provides a kind of one road high speed signal of realizing to be decomposed into the method for multi-path low speed signal, is used at the receiver side of high speed optical communication system one road high speed signal being decomposed into the multi-path low speed signal, comprises the steps:
Step 301: after light/electric conversion and interface conversion, carrying out simple demultiplexing is at least one road low speed signal (generally being 4 tunnel) with the road high speed signal that received;
Step 302: at least one road low speed signal to behind the simple demultiplexing, carry out the forward error correction digital solution and seal;
Step 303: will unpack at least one road low speed signal of being honored as a queen after carrying out electricity/light conversion and interface conversion, and export the low speed transmissions circuit to.
Wherein, in the described step 301 one road high speed signal being carried out simple demultiplexing mode comprises:
Directly separate and interleave;
Or directly separate to interleave afterwards and do distribution according to corresponding high speed signal band internal labeling;
Or carry out frame synchronization, descrambling according to the synchronous head that keeps in the high speed signal, then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
Carry out the step that the forward error correction digital solution is sealed in the described step 302, the forward error correction digital solution that carries out of standard that meets G.709 that is based on that the asynchronous mapping mode of local clock done is sealed.
The present invention is carrying out in the bi-directional conversion process multi-path low speed signal and one road high speed signal, so-called low-rate signal is exactly to introduce to prepare to converge the tributary signal that becomes high rate data transmission, and the two-forty signal is exactly to converge the main line signal that several tributary signals form by the present invention.Converge when becoming the 10G speed rates when for example adopting the STM16 of 4 branch roads, 2.5G is exactly a low-rate signal, and the 10G signal is exactly a two-forty.In like manner, converge 4 STM64 when becoming the transmission of 40G signal, 10G is exactly a low-rate signal, and the 40G signal is exactly a two-forty.
The scheme that the present invention advocated is made of 4 parts: the light/electricity of low-rate signal, electricity/light conversion and interface conversion; The FEC digital wrapper of low speed signal/separate and seal (meet G.709 standard, adopt asynchronous mapping); The demultiplexing of simply multiplexing/one road high speed signal of several roads low speed signal; Light/the electricity of two-forty signal, electricity/light conversion and interface conversion.
Embodiment 1:
As shown in Figure 4, illustrated that 4 STM64 signal gatherings become the theory diagram that a 40G signal transmits.In this embodiment, the 10G signal is exactly the said low-rate signal of the present invention, and the 40G signal is exactly the said two-forty signal of the present invention.
In Fig. 4, corresponding 10G transponder is exactly light/electricity, the electricity/light conversion and the interface conversion unit of the said low-rate signal of the present invention.10G FEC codec chip, the FEC digital wrapper/separate that is exactly the said low speed signal of the present invention are sealed (meet G.709 standard, adopt asynchronous mapping) unit.The simple multiplex/demultiplex of 40G unit is exactly the demultiplexing unit of simply multiplexing/one road high speed signal of several roads of the present invention low speed signal.40G/43G transponder is exactly light/electricity, the electricity/light conversion and the interface conversion unit of two-forty signal.
The following describes 4 STM64 and converge the process that becomes a 40G, in the embodiment shown in fig. 4, the low rate not light signal input of homology is 4 not STM64 of homology, and the processing through 10Gtransponder becomes the signal of telecommunication that 10G FEC codec chip can receive.Finish at transmitter side at 10GFEC codec chip place and to meet the G.709 FEC digital wrapper of standard based on local clock for 4 STM64 signals.When carrying out this step, use local clock clk to carry out the G.709 asynchronous mapping of defined, so just the homogeneity FEC time on tape of the STM64 signal of several not homologies.
Simple to divide what insert that the unit carried out be to 4 signals of sealing of digital packets at 40G, i.e. the OTU2 of defined G.709 carries out simply multiplexingly, becomes a 40G signal.Certainly, simple multiplexing mode still is as mentioned above the same, and three select one.
● directly interleave;
● the SDH signal of several low rates is made band directly interleave after the internal labeling;
● after directly interleaving back reservation first via OTU2 synchronous head, thereby use scrambler that all data scramblings except this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure above the two-forty.
Become light signal behind the output process 40G/43G transponder of the simple multiplex/demultiplex of 40G unit, just can transmit.
Receiver side is corresponding with transmitter side, in Fig. 4, the 43G light signal of a two-forty enters 40G/43G transponder, the O/E conversion of process 40G/43G transponder inside and serial/parallel conversion are sent into the simple multiplex/demultiplex of 40G unit and are carried out demultiplexing, restore the OTU2 of several low rates, three kinds of simple modes of inserting of dividing corresponding to transmitter side also will be selected suitable demultiplexing mode herein, are respectively:
● directly separate and interleave;
● directly separate to interleave afterwards and be with internal labeling to do distribution according to corresponding SDH;
● carry out frame synchronization according to the synchronous head that keeps, descrambling is then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
Then at 10G FEC codec chip place, according to standard G.709 several OTU2 are handled, adopt the asynchronous mapping mode equally, restore i.e. 4 road STM64 of branch road information.Through 10Gtransponder, source information is just reduced fully.
Embodiment 2:
As shown in Figure 5,4 STM16 signal gatherings become a 10G signal transmission.In embodiment 2, the STM16 signal is exactly the said low-rate signal of the present invention, and the 10G signal is exactly the said two-forty signal of the present invention.
Corresponding 2.5G transponder is exactly light/electricity, the electricity/light conversion and the interface conversion unit of the said low-rate signal of the present invention.2.5G being exactly the FEC digital wrapper/separate of the said low speed signal of the present invention, the FEC codec chip seals (meet G.709 standard, adopt asynchronous mapping) unit.The simple multiplex/demultiplex of 10G unit is exactly the demultiplexing unit of simply multiplexing/one road high speed signal of several roads of the present invention low speed signal.10G/10.7G Transponder is exactly light/electricity, the electricity/light conversion and the interface conversion unit of two-forty signal.
In Fig. 5, illustrated that 4 STM16 converge the process that becomes a 10G high speed signal.In the embodiment shown in fig. 5, the low rate not light signal input of homology is 4 not STM16 of homology, and the processing through 2.5G transponder becomes the signal of telecommunication that 2.5G FEC codec chip can receive.Finish at transmitter side at 2.5G FEC codec chip place and to meet the G.709 FEC digital wrapper of standard based on local clock for 4 STM16 signals.When carrying out this step, use local clock clk to carry out the G.709 asynchronous mapping of defined, so just the homogeneity FEC time on tape of the STM16 signal of several not homologies.
What the simple Multiplexing Unit of 10G carried out be,, carry out simply multiplexingly, become a 10G signal 4 i.e. OTU1 of defined G.709 of the signal sealed of digital packets.Certainly, simple multiplexing mode still is as mentioned above the same, and three select one.
● directly interleave;
● the SDH signal of several low rates is made band directly interleave after the internal labeling;
● after directly interleaving back reservation first via OTU2 synchronous head, thereby use scrambler that all data scramblings except this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure above the two-forty.
10G becomes light signal after simply dividing the output process 10G/10.7G transponder that insert/separates the slotting unit of branch, just can transmit.
Receiver side is corresponding with transmitter side, in Fig. 5, the 10.7G light signal of a two-forty enters 10G/10.7G transponder, transform and serial/parallel conversion is sent into 10G and simply separated the slotting unit of branch and carry out demultiplexing through the O/E of 10G/10.7G transponder inside, restore the OTU1 of several low rates, corresponding to three kinds of simple multiplex modes of transmitter side, also to select suitable demultiplexing mode herein, be respectively:
● directly separate and interleave;
● directly separate to interleave afterwards and be with internal labeling to do distribution according to corresponding SDH;
● carry out frame synchronization according to the synchronous head that keeps, descrambling is then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
Then at 2.5G FEC codec chip place, according to standard G.709 several OTU1 are handled, adopt the asynchronous mapping mode equally, restore i.e. 4 road STM16 of branch road information, through 2.5Gtransponder, source information is just reduced fully.
Claims (10)
1. device of realizing multi-path low speed signal and one road high speed signal bi-directional conversion, the emitting side that is used at high speed optical communication system is one road high speed signal with the multi-path low speed signal gathering, or one road high speed signal is decomposed into the multi-path low speed signal at the receiver side of high speed optical communication system, it is characterized in that, comprising:
At least one low speed signal converting unit, be used for when the multi-path low speed signal gathering is one road high speed signal, at least one road low speed signal is carried out light/electric conversion and interface conversion, or when one road high speed signal is decomposed into the multi-path low speed signal, carry out being sent to the low speed transmissions circuit after electricity/light conversion and the interface conversion with unpacking at least one road low speed signal of being honored as a queen;
At least one low speed signal is sealed/is separated and seals the unit, be used for when the multi-path low speed signal gathering is one road high speed signal, to carry out the forward error correction digital wrapper through this road low speed signal after the conversion of low speed signal converting unit, or when one road high speed signal is decomposed into the multi-path low speed signal, at least one road low speed signal behind the simple demultiplexing is carried out the forward error correction digital solution seal;
The simple multiplex/demultiplex of a signal unit, be used for when the multi-path low speed signal gathering is one road high speed signal, multi-path low speed signal after sealing simply is multiplexed with one road high speed signal, or when one road high speed signal is decomposed into the multi-path low speed signal, with the simple demultiplexing of road high speed signal after electricity/light conversion and the interface conversion is the multi-path low speed signal, and described low speed signal is sealed/separated and seals the unit and according to the asynchronous mapping mode of local clock G.709 the low speed signal of input and high speed signal met the forward error correction digital wrapper of standard/separate and seal;
A high speed signal converting unit, be used for when the multi-path low speed signal gathering is one road high speed signal, road high speed signal after simple multiplexing is carried out being sent to the high-speed transfer circuit after electricity/light conversion and the interface conversion, or when one road high speed signal is decomposed into the multi-path low speed signal, one road high speed signal is carried out light/electric conversion and interface conversion.
2. device as claimed in claim 1 is characterized in that, described low speed signal converting unit comprises:
Light/electric varitron unit is used for when the multi-path low speed signal gathering is one road high speed signal, and input is carried out light/electric conversion from one road low speed signal of low speed line;
The first interface conversion subelement is used for when the multi-path low speed signal gathering is one road high speed signal, and this road low speed signal after light/electric conversion is carried out interface conversion, and the low speed signal after the interface conversion is delivered to low speed signal and seal/separate seal the unit;
The second interface conversion subelement is used for when one road high speed signal is decomposed into the multi-path low speed signal, seals the low speed signal that unpacking of unit be honored as a queen and carries out interface conversion sealing from low speed signal/separating;
Electricity/light varitron unit is used for when one road high speed signal is decomposed into the multi-path low speed signal, and this road low speed signal after the docking port conversion carries out electricity/light conversion, and this road low speed signal after electricity/light conversion is delivered to the low speed transmissions circuit.
3. device as claimed in claim 1 is characterized in that, the simple multiplex/demultiplex of described signal unit comprises:
The simple multiplexing subelement of low speed signal is used for when the multi-path low speed signal gathering is one road high speed signal, low speed signal is sealed/separated to seal the low speed signal that unit pack is honored as a queen and simply be multiplexed with one road high speed signal;
The simple demultiplexing subelement of high speed signal is used for when one road high speed signal is decomposed into the multi-path low speed signal, and it is the multi-path low speed signal that the road high speed signal of sending here after the conversion of high speed signal converting unit is carried out simple demultiplexing.
4. device as claimed in claim 3 is characterized in that, described high speed signal converting unit comprises:
The first interface conversion subelement is used for when the multi-path low speed signal gathering is one road high speed signal, to carrying out interface conversion from the high speed signal after the simple multiplexing subelement of low speed signal simple multiplexing;
Electricity/light varitron unit is used for when the multi-path low speed signal gathering is one road high speed signal, and this road high speed signal after the docking port conversion carries out electricity/light conversion, and this road high speed signal after electricity/light conversion is delivered to the high-speed transfer circuit;
Light/electric varitron unit is used for when one road high speed signal is decomposed into the multi-path low speed signal, and the road high speed signal of importing is carried out light/electric conversion;
The first interface conversion subelement is used for when one road high speed signal is decomposed into the multi-path low speed signal, and the high speed signal after light/electric conversion is carried out interface conversion, and the high speed signal after the interface conversion is delivered to the simple demultiplexing subelement of high speed signal.
5. device as claimed in claim 1 is characterized in that, the simple multiplex/demultiplex of described signal unit when the multi-path low speed signal gathering is one road high speed signal, carries out simple multiplexing mode to the low speed signal after sealing and comprises:
Directly interleave;
The signal of several low speed is made band directly to be interleave after the internal labeling;
After directly interleaving back reservation one road synchronous head, thereby use scrambler that all data scramblings except this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure above the two-forty.
6. device as claimed in claim 1 is characterized in that, the simple multiplex/demultiplex of described signal unit, and when one road high speed signal was decomposed into the multi-path low speed signal, the mode of high speed signal being carried out simple demultiplexing comprised:
Directly separate and interleave;
Directly separating to interleave then is with internal labeling to do distribution according to high speed signal accordingly;
Carry out frame synchronization, descrambling according to the synchronous head that keeps, then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
7. realize that the multi-path low speed signal gathering is the method for one road high speed signal for one kind, the emitting side that is used at high speed optical communication system is one road high speed signal with the multi-path low speed signal gathering, it is characterized in that, comprises the steps:
(1) will be through at least one road low speed signal after light/electric conversion and the interface conversion, carry out being met the G.709 forward error correction digital wrapper of standard based on what the asynchronous mapping mode of local clock did;
(2) the multi-path low speed signal after will sealing simply is multiplexed with one road high speed signal;
(3) will carry out exporting the high-speed transfer circuit to after interface conversion and electricity/light conversion through this road high speed signal after simple multiplexing.
8. method as claimed in claim 7 is characterized in that, in the described step (2) the multi-path low speed signal is carried out simple multiplexing mode and comprises:
Only directly interleave;
Or several low speed signals are made band directly to be interleave after the internal labeling;
Or after directly interleaving back reservation one road synchronous head, thereby utilize scrambler that all data scramblings except that this synchronous head are eliminated all the other several roads synchronous heads, form the pseudo-frame structure of telling above the rate.
9. realize that one road high speed signal is decomposed into the method for multi-path low speed signal for one kind, be used for one road high speed signal being decomposed into the multi-path low speed signal, it is characterized in that, comprise the steps: at the receiver side of high speed optical communication system
(1) with the road high speed signal that received after light/electric conversion and interface conversion, carrying out simple demultiplexing is at least one road low speed signal;
(2), carry out sealing based on the forward error correction digital solution of standard that meets G.709 that the asynchronous mapping mode of local clock is done at least one road low speed signal behind the simple demultiplexing;
(3) will unpack at least one road low speed signal of being honored as a queen after carrying out electricity/light conversion and interface conversion, export the low speed transmissions circuit to.
10. method as claimed in claim 9 is characterized in that, in the described step (1) one road high speed signal is carried out simple demultiplexing mode and comprises:
Directly separate and interleave;
Or directly separate to interleave afterwards and do distribution according to corresponding high speed signal band internal labeling;
Or carry out frame synchronization, descrambling according to the synchronous head that keeps in the high speed signal, then according to carrying out the distribution of tributary signal with respect to the relative position of frame synchronization head.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100078374A CN101026427B (en) | 2006-02-17 | 2006-02-17 | Device and method for realizing multi-channel low-speed signal and one-channel high speed signal two-way conversion |
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| CN2006100078374A CN101026427B (en) | 2006-02-17 | 2006-02-17 | Device and method for realizing multi-channel low-speed signal and one-channel high speed signal two-way conversion |
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| CN101488827B (en) * | 2008-01-14 | 2015-07-08 | 华为技术有限公司 | Method and apparatus for implementing data error reporting |
| CN101965701B (en) * | 2008-02-07 | 2015-06-24 | 英飞聂拉股份有限公司 | Dual asynchronous mapping of client signals of arbitrary rate |
| EP2262178A1 (en) * | 2009-06-10 | 2010-12-15 | Alcatel Lucent | Method for discontinuously transferring data in a point-to-multipoint access network, central unit, and network termination unit |
| CN102215628B (en) * | 2011-03-09 | 2013-07-10 | 华为技术有限公司 | Super-thick circuit board |
| CN103257668A (en) * | 2013-04-19 | 2013-08-21 | 中国科学院自动化研究所 | System and method for replacing high-speed function unit with low-speed multiport function unit |
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| CN2537176Y (en) * | 2002-04-27 | 2003-02-19 | 飞博创（成都）科技有限公司 | Optical transmitting-receiving module with digital packing function |
| CN1734986A (en) * | 2004-08-11 | 2006-02-15 | 华为技术有限公司 | Method for transmitting low-speed service signal in optical transport network and its device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2537176Y (en) * | 2002-04-27 | 2003-02-19 | 飞博创（成都）科技有限公司 | Optical transmitting-receiving module with digital packing function |
| CN1734986A (en) * | 2004-08-11 | 2006-02-15 | 华为技术有限公司 | Method for transmitting low-speed service signal in optical transport network and its device |
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