CN101695144B - A kind of method and system supporting multi service access and transmission - Google Patents
A kind of method and system supporting multi service access and transmission Download PDFInfo
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- CN101695144B CN101695144B CN200910235670.0A CN200910235670A CN101695144B CN 101695144 B CN101695144 B CN 101695144B CN 200910235670 A CN200910235670 A CN 200910235670A CN 101695144 B CN101695144 B CN 101695144B
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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]
- H04J3/1658—Optical Transport Network [OTN] carrying packets or ATM cells
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Abstract
The invention discloses a kind of method and system supporting multi service access and transmission, at transmitting terminal, by multichannel different rates or the data service signal of single channel be mapped in gfp frame, map in ODU0 multiplexing to realize intersection after carrying out rate adapted again, then by dividing time slot and synchronization map in OTN frame, and carry out changing being sent by OTN again; At receiving terminal, carry out OTN after receiving OTN frame and separate frame process, realize the data service of multi-path low speed rate.Therefore, adopt the present invention can realize multichannel access and the transmission of multiple speed ratio data service, improve bandwidth availability ratio and efficiency of transmission.
Description
Technical field
The present invention relates to access and the transmission technology of optical transfer network (OTN, Optical Transport Network), particularly relate to a kind of method and system supporting multi service access and transmission.
Background technology
At present, OTN is based on wavelength-division multiplex technique, in the transport network of photosphere organization network, being follow-on Backbone Transport Network, is also that telecommunications network carries out one of information transmission principal mode.G.709, telecommunication standardization bureau (ITU-T) defines structure and the speed of the frame of OTN, bandwidth granularity as OTN electrical domain is light path data cell (OPUk), wherein k=1,2,3, G.709 in, the minimum speed limit grade OPU1 of regulation is 2.48832Gbps, and its granularity is larger.
The main bearer service of telecommunications network is data service, as: gigabit Ethernet (GE, Gigabit Ethernet), fiber channel (FC, Fibre Channel) etc., the popular feature of these data services are speed ratios compared with low, granularity is little.But, still immature to the transmission method of this kind of low rate traffic such as data service in optical transfer network, such as: when data service is encapsulated, adopt Generic Framing Procedure (GFP, Generic FramingProcedure) data service is encapsulated in GFP, be mapped to again in the virtual container of SDH, then be mapped in OTN frame structure by the synchronous digital hierarchy (SDH) that G.957 the defines mapping method to light path Payload Unit (OPUk), transmit finally by optical fiber.But the frame structure related to due to the method is more as GFP, SDH, OTN frame structure etc., and the expense of gfp frame structure itself is comparatively large, and cause frame structure expense larger time especially in the virtual container being mapped to SDH, bandwidth availability ratio is not high.
And for example: be encapsulated into after in GFP through GFP in data service, data service is mapped directly in the OPUk of OTN, namely adopt GFP to carry the mode of (over) OTN.Although the method increase transmission bandwidth utilance, the bandwidth of data service is generally little than the bandwidth of OPUk, and needs to insert a large amount of GFP idle frame to carry out rate adapted, and therefore the efficiency of transmission of the method is lower.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of method and system supporting multi service access and transmission, can realize multichannel access and the transmission of multiple speed ratio data service, improve bandwidth availability ratio and efficiency of transmission.
For achieving the above object, the invention discloses a kind of method supporting multi service access and transmission, comprise: at transmitting terminal, the signal of each circuit-switched data business input is changed and decodes process, be encapsulated into processing the parallel data obtained in Generic Framing Procedure-transparent transmission GFP-T Frame, and through-rate allotment obtains GFP-T data flow; By GFP-T data stream in light path data cell ODU0; Time slot in divided light transport network OTN frame, and the data in ODU0 are pressed time slot synchronization map to OTN frame, transmit described OTN frame by OTN; At receiving terminal, dock data in the OTN frame received by time slot and carry out demapping, obtain the ODU0 data of each circuit-switched data business; According to obtained ODU0 data acquisition GFP-T data flow, and rate adapted is carried out to this GFP-T data flow obtain GFP-T Frame; Decapsulation is carried out to GFP-T Frame and obtains concurrent service data flow, and send customer provided equipment to by after encoded for described concurrent service data flow and conversion process.
Wherein, the described signal to the input of each circuit-switched data business is changed and process of decoding comprises: serial data is converted to parallel data, and does the process of physics layer decoder to the parallel data be converted to.Describedly carry out speed allotment and obtain GFP-T data flow and be: distribute to the bandwidth of current data service passage and the degree of depth of fifo fifo unit according to ODU0, insert in GFP-T Frame or delete idle frame IDLE frame, rate adapted is carried out to the data in GFP-T Frame, forms GFP-T data flow.
In said method, the ODU0 data acquisition GFP-T data flow that described basis obtains and to this GFP-T data flow carry out rate adapted obtain GFP-T Frame for: 16 row overhead datas before in obtained ODU0 data are removed, obtain GFP-T data flow; Again the IDLE frame in the GFP-T data flow obtained is removed, obtain GFP-T Frame.
Wherein, describedly transmit OTN frame by OTN and be: the parallel data in OTN frame is converted to serial data; Electro-optic conversion is carried out to the serial data obtained, converts electrical signals to light signal, and transmit described light signal by OTN.Describedly to comprise sending customer provided equipment to after encoded for concurrent service data flow and conversion process: physical layer encodes process is carried out to described concurrent service data flow; Parallel serial conversion and opto-electronic conversion are carried out to local parallel data after coding, sends the light signal be converted to customer provided equipment.
For realizing said method, the present invention proposes a kind of system supporting multi service access and transmission, comprising: transmitting terminal and receiving terminal; Wherein, transmitting terminal, for processing the signal of each circuit-switched data business input, be encapsulated in GFP-T Frame by processing the parallel data obtained, through-rate allotment obtains GFP-T data flow, and by GFP-T data stream in ODU0; And the data in ODU0 are pressed time slot synchronization map to OTN frame, and are transmitted described OTN frame by OTN by the time slot in divided light transport network OTN frame; Receiving terminal, for carrying out to data in the OTN frame received the ODU0 data that demapping obtains each circuit-switched data business according to time slot, rate adapted is carried out to this GFP-T data flow obtain GFP-T Frame according to described ODU0 data acquisition GFP-T data flow, decapsulation is carried out to GFP-T Frame and obtains concurrent service data flow, and send customer provided equipment to by after described concurrent service Data Stream Processing.
In said system, described transmitting terminal comprises: the first processing module, GFP-T framing module, first rate adaptation module, ODU0, OTN framing module; Wherein, the first processing module, for processing the signal of each circuit-switched data business input; GFP-T framing module, is encapsulated in GFP-T Frame for the treatment of the parallel data obtained; First rate adaptation module, for allocating the speed of data in described GFP-T Frame, and obtains GFP-T data flow; One ODU0, for by described GFP-T data stream in ODU0; Data in ODU0, for the time slot in divided light transport network OTN frame, are pressed time slot synchronization map to OTN frame, and are transmitted described OTN frame by OTN by OTN framing module.
Wherein, described first processing module also comprises: the first serioparallel exchange unit and the first physical layer processing unit; First serioparallel exchange unit, for carrying out serial parallel conversion, is converted to parallel data by serial data; First physical layer processing unit, for doing the process of physics layer decoder to parallel data; And/or described OTN framing module also comprises: the first parallel serial conversion unit, the first electro-optic conversion and transmitting element; Wherein, the first parallel serial conversion unit, for carrying out Parallel-serial convert to the data in OTN frame, is converted to serial data by parallel data; First electro-optic conversion and transmitting element, for carrying out electro-optic conversion to the serial data obtained, and send to receiving terminal by the light signal be converted to.
In said system, described receiving terminal comprises: OTN solution frame module, the 2nd ODU0, the second rate adaptation module, GFP-T separate frame module, the second processing module; Wherein, OTN separates frame module, for carrying out to data in the OTN frame received the ODU0 data that demapping obtains each circuit-switched data business according to time slot; 2nd ODU0, for according to described ODU0 data acquisition GFP-T data flow; Second rate adaptation module, obtains GFP-T Frame for carrying out rate adapted to this GFP-T data flow; GFP-T separates frame module, obtains concurrent service data flow for carrying out decapsulation to GFP-T Frame; Second processing module, for processing described concurrent service data flow, and sends customer provided equipment to.
Wherein, described OTN solution frame module also comprises: photoelectric conversion unit and the second serioparallel exchange unit; Wherein, photoelectric conversion unit, for being converted to the signal of telecommunication by the light signal received; Second serioparallel exchange unit, for being converted to parallel data by the serial data received; And/or described second processing module comprises: the second physical layer processing unit, the second parallel serial conversion unit, the second electro-optic conversion and transmitting element; Wherein, the second physical layer processing unit, for carrying out physical layer encodes process to described concurrent service data flow; Second parallel serial conversion unit, for carrying out parallel serial conversion to local parallel data after coding; Second electro-optic conversion and transmitting element, for converting electrical signals to light signal, and send to customer provided equipment by the light signal be converted to.
As can be seen from the above technical solutions, the present invention supports the method and system of multi service access and transmission, first data service signal is mapped in gfp frame, then is mapped in ODU0 scanning frequency rate adjustment of going forward side by side, then the data in ODU0 are mapped in OPUk according to the method for time-division slot and transmit.So, the business multichannel access of multiple speed can be realized easily and flexibly, as the transmission of the transmission of: GE/FC, gigabit, 100 m ethernet.
Further, by the ODU0 structure adopting granularity smaller, and make granularity controlled, can be convenient to access more Low rate data traffic; Repeat in work can be carried out flexibly multiplexing, enable OTN carry low rate traffic, facilitate the scheduling feature of data service.In addition, in the present invention ODU0 to OPUk be mapped as synchronization map, do not need speed to adjust, be convenient to add drop multiplex.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the present invention supports the embodiment of the method one of multi service access and transmission;
Fig. 2 is the schematic flow sheet that the present invention supports the embodiment of the method two of multi service access and transmission;
Fig. 3 is the system configuration composition schematic diagram that the present invention supports multi service access and transmission.
Embodiment
Basic thought of the present invention is: transmitting terminal by multichannel different rates or the data service signal of single channel be mapped in gfp frame, map in ODU0 multiplexing to realize intersection after carrying out rate adapted again, then by dividing time slot and synchronization map in OTN frame, and carry out changing being sent by OTN again; Receiving terminal carries out OTN and separates frame process after receiving OTN frame, recover the data service of multi-path low speed rate.
It should be noted that, ODU0 is a kind of light path data cell that the present invention is arranged, and its speed is the speed of OPU1 and 1/2nd of 2.48832Gbps.Further, ODUk frame structure comprises for carrying payload data OPUk and frame headers overhead byte, and ODUk is equivalent to channel layer, and the light path delivery unit OTUk section of being equivalent to layer, on the basis of ODUk frame, the frame headers overhead byte arranging OTUk just obtains OTUk frame.
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, and below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
It is pointed out that and to be determined primarily of factors such as the speed height of this data service, the speed of OTU1 by the number of the data service of OTN Internet Transmission.
Below with two paths of data business as two-way GE data service signal is transmitted as example by OTU1, illustrate that the present invention supports the method for multi service access and transmission, Fig. 1 is the realization flow schematic diagram of the present embodiment, and as shown in Figure 1, the present embodiment mainly comprises the steps:
Step 101, at transmitting terminal, carries out serial parallel conversion and physical layer process to the data service signal of input;
The serial data traffic signal of input is converted to parallel data by serial parallel/serializer (SERDES, SERializer/DESerializer) by transmitting terminal; Then, physical layer carries out physical layer process to the parallel data obtained, and as carried out 8B10B decoding, parallel data being converted to 8 8B parallel data streams, so can reducing check byte, and then reducing the speed of this data service.
Here, described SERDES is a kind of signal conversion equipment, carries out serial parallel conversion to the serial signal of input, and carries out parallel series to parallel signal of its input and namely to unstring conversion.
Step 102, is encapsulated in Generic Framing Procedure-transparent transmission (GFP-T) Frame by the parallel data after physical layer process;
Wherein, be encapsulated into obtaining parallel data such as 8B parallel data stream after physical layer process in GFP-T Frame.Here, described GFP has framing and maps and transparent mapped two kinds of modes, can tackle the business of different demand respectively.Framing maps needs customer data buffer memory to get off to carry out protocol processes, and solve customer data bag, then be encapsulated in gfp frame structure, this framing mapping mode is applicable to time delay, shakes insensitive business; And for needing the business of less time delay and more high-transmission efficiency, transparent mapped mode can be adopted, namely direct data to be taken out from customer data block, then map into periodically, in the fixing gfp frame structure of length.That the present embodiment adopts is the latter---transparent mapped mode.
Step 103, carries out speed allotment to the data in GFP-T Frame, forms GFP-T data flow;
The bandwidth of current data service passage and the degree of depth of first in first out (FIFO) unit is distributed to according to ODU0, in GFP-T Frame, insert or delete the method for IDLE frame, rate adapted is carried out to the data in GFP-T Frame, with the rate requirement making the data flow in GFP-T Frame meet ODU0, and then form GFP-T data flow.
In addition, owing to adding the expense of GFP-T Frame, the speed of GFP-T data flow is made to be greater than the speed of data service.Wherein, the expense content of GFP-T Frame comprises check byte etc., so, can by information such as the check byte in GFP-T Frame expense content, monitor GFP-T Frame whether normal transmission.
Step 104, by the OPU0 position of GFP-T data stream to ODU0;
Wherein, the frame structure of described ODU0 is that four lines 3808 arranges, and wherein front 16 be classified as overhead data, rear 3792 are classified as payload section OPU0, and this payload section OPU0 is for placing GPF-T data flow.And the front 16 row overhead datas of ODU0 can customize setting, the Overhead data portion of ODU0 can fill out full 0 or other data, as: frame head, service channel coding, check code etc.Here, by GFP-T data stream to OPU0, being by carrying out rate adapted, taking byte to byte, the mode that one_to_one corresponding maps realizes.
Here, intersect multiplexing to realize and make full use of bandwidth, by the OPU0 position of GFP-T data stream to ODU0.And owing to adding the overhead byte of ODU0, the speed of ODU0 is greater than the speed of GFP-T, so, the data monitoring to OPU0 is realized by the overhead byte of ODU0.
Step 105, by the data in ODU0 by time slot synchronization map in the OTN frame completing OPUk time-slot division, and Parallel-serial convert and electro-optic conversion are carried out to the data in OTN frame, the light signal be converted to are transmitted by OTN;
Wherein, divide the time slot of the OPUk in OTN frame according to the speed of data service, and when being no more than line bandwidth, the data in ODU0 are pressed time slot synchronization map in OTN frame.Such as: if when transmitting two paths data service is as GE, be then two kinds of time slots by the time-slot division of the OPU1 in OTU1 frame, time slot 1 places the ODU0 data of business 1, takies the odd bytes position of payload section OPUk; Time slot 2 places the ODU0 data of business 2, takies the position of the even bytes of payload section OPUk.Further, ODU0 to OPUk is mapped as synchronization map, does not need speed to adjust, is convenient to add drop multiplex.
Wherein, each time slot size is 1 byte, and the speed of ODU0 equals the speed of OPUk divided by time slot kind, such as: when passing two paths of data business by OTU1 frame, the speed of the ODU0 data of business 1 is 1/2nd of OPU1, and the speed of the ODU0 data of business 2 is 1/2nd of OPU1.
Step 106, receiving terminal carries out demapping to the described OTN frame OPUk data that it receives according to time slot, solves the ODU0 data of each road business;
Wherein, serial data is converted to parallel data after transferring the light signal received to the signal of telecommunication by receiving terminal, then carries out demapping according to time slot.Describedly carry out demapping according to time slot and refer to the data in the time slot shared by same business are put together, form the ODU0 data on corresponding each road.
16 row overhead datas before in described ODU0 data are removed, obtain GFP-T data flow by step 107;
Step 108, through-rate adaptation removes the IDLE frame in GFP-T data flow, obtains GFP-T Frame;
Step 109, carries out decapsulation to GFP-T Frame, obtains concurrent service data flow;
Wherein, decapsulation is carried out to GFP-T Frame and obtains concurrent service data flow, as solved the 8B concurrent service data flow of data service signal as GE signal.
Step 110, after carrying out physical layer process, carries out parallel serial conversion and electro-optic conversion, and sends the light signal be converted to customer provided equipment described concurrent service data flow.
Physical layer process is carried out as carried out 8B10B coding to described concurrent service data flow, then enters SERDES and carry out parallel serial conversion, then carry out opto-electronic conversion, after the signal of telecommunication being transferred to light signal, send customer provided equipment to.
Described above is, two paths of data business such as two-way GE data service signal is transmitted by OTU1, next, the present embodiment with single-pass data business as a road 2GFC business illustrates that the present invention supports the method for multi service access and transmission, Fig. 2 is the realization flow schematic diagram of the present embodiment two, as shown in Figure 2, the present embodiment mainly comprises the steps:
Step 201, at transmitting terminal, is converted by SERDES the 2GFC service signal on a road, is converted to parallel data by serial data, then carry out 8B10B decoding, solve 8B parallel data stream;
Step 202, is mapped in GFP-T Frame by described 8B parallel data stream;
Step 203, distributes to the bandwidth of current data service passage according to ODU0, by inserting IDLE frame, realize rate adapted, forms GFP-T data flow;
Step 204, by the OPU0 position of GFP-T data stream to ODU0;
Wherein, the Overhead data portion of ODU0 can fill out full 0 or other data.
Step 205, by the whole region of OPU1 in the data-mapping of ODU0 to OTU1 frame, and is carried out Parallel-serial convert and electro-optic conversion to the data in OTU1 frame, is transmitted by the light signal be converted to by OTN;
Here, the major part of OPU1 or whole time slot allocation, for OTU1 frame, because the speed ratio of the data service of unicast communication is comparatively large, can be given this data service, make the data of ODU0 take the whole region of OPU1 in OTU1 frame by the present embodiment usually.Wherein, by byte one to one mode by the data-mapping of ODU0 to the whole region of OPU1.
Step 206, receiving terminal carries out demapping to OPU1 data in the OTU1 frame received, and obtains ODU0 data;
After receiving terminal transfers the light signal received to the signal of telecommunication, according to time slot, demapping is carried out to OPU1 data in OTU1 frame.
Step 207, removes the front 16 row expense contents in ODU0 data, forms GFP-T data flow;
Step 208, carries out rate adapted to GFP-T data flow, removes the IDLE frame in GFP-T, obtains GFP-T Frame;
Step 209, carries out decapsulation process to GFP-T Frame, solves the 8B parallel data stream of 2GFC signal;
Step 210, after carrying out 8B10B coding, enters SERDES and carries out parallel serial conversion, then carry out electro-optic conversion, and give customer provided equipment by the light signal be converted to the 8B parallel data stream of 2GFC signal.
So far, can show that the advantage of method of the present invention is by above-described embodiment, ODU0 granularity is controlled, is convenient to access more Low rate data traffic.And ODU0 to OPUk is mapped as synchronization map, does not need speed to adjust, be convenient to add drop multiplex.
For above-mentioned each embodiment, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.
For realizing said method, the present invention also provides a kind of system supporting multi service access and transmission, comprises as shown in Figure 3: transmitting terminal and receiving terminal; Wherein,
Transmitting terminal, for processing the signal of each circuit-switched data business input, be encapsulated in GFP-T Frame by processing the parallel data obtained, through-rate allotment obtains GFP-T data flow, and by GFP-T data stream in ODU0; And the data in ODU0 are pressed time slot synchronization map to OTN frame, and are transmitted described OTN frame by OTN by the time slot in divided light transport network OTN frame;
Receiving terminal, for carrying out to data in the OTN frame received the ODU0 data that demapping obtains each circuit-switched data business according to time slot, rate adapted is carried out to this GFP-T data flow obtain GFP-T Frame according to described ODU0 data acquisition GFP-T data flow, decapsulation is carried out to GFP-T Frame and obtains concurrent service data flow, and send customer provided equipment to by after described concurrent service Data Stream Processing.
In said system, described transmitting terminal comprises: the first processing module, GFP-T framing module, first rate adaptation module, ODU0, OTN framing module; Wherein,
First processing module, for processing the signal of each circuit-switched data business input;
GFP-T framing module, is encapsulated in GFP-T Frame for the treatment of the parallel data obtained;
First rate adaptation module, for allocating the speed of data in described GFP-T Frame, and obtains GFP-T data flow;
One ODU0, for by described GFP-T data stream in ODU0;
Data in ODU0, for the time slot in divided light transport network OTN frame, are pressed time slot synchronization map to OTN frame, and are transmitted described OTN frame by OTN by OTN framing module.
Here, described first processing module also comprises: the first serioparallel exchange unit and the first physical layer processing unit; Wherein, the first serioparallel exchange unit, for carrying out serial parallel conversion, is converted to parallel data by serial data; First physical layer processing unit, for doing the process of physics layer decoder to parallel data;
And/or described OTN framing module also comprises: the first parallel serial conversion unit, the first electro-optic conversion and transmitting element.Wherein:
First parallel serial conversion unit, for carrying out Parallel-serial convert to the data in OTN frame, is converted to serial data by parallel data;
First electro-optic conversion and transmitting element, for carrying out electro-optic conversion to the serial data obtained, and send to receiving terminal by the light signal be converted to.
In said system, described receiving terminal comprises: OTN solution frame module, the 2nd ODU0, the second rate adaptation module, GFP-T separate frame module, the second processing module; Wherein,
OTN separates frame module, for carrying out to data in the OTN frame received the ODU0 data that demapping obtains each circuit-switched data business according to time slot;
2nd ODU0, for according to described ODU0 data acquisition GFP-T data flow;
Second rate adaptation module, obtains GFP-T Frame for carrying out rate adapted to this GFP-T data flow;
GFP-T separates frame module, obtains concurrent service data flow for carrying out decapsulation to GFP-T Frame;
Second processing module, for processing described concurrent service data flow, and sends customer provided equipment to.
In said system, described OTN separates frame module and also comprises: photoelectric conversion unit and the second serioparallel exchange unit.Wherein:
Photoelectric conversion unit, for being converted to the signal of telecommunication by the light signal received;
Second serioparallel exchange unit, for being converted to parallel data by the serial data received.
And/or described second processing module comprises: the second physical layer processing unit, the second parallel serial conversion unit, the second electro-optic conversion and transmitting element.Wherein:
Second physical layer processing unit, for carrying out physical layer encodes process to described concurrent service data flow;
Second parallel serial conversion unit, for carrying out parallel serial conversion to local parallel data after coding;
Second electro-optic conversion and transmitting element, be converted to light signal for the signal of telecommunication, and send the light signal be converted to customer provided equipment.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.The above, be only preferred embodiment of the present invention, is only used to description and interpretation the present invention, is not intended to limit protection scope of the present invention.Within spirit of the present invention and claims, any amendment made for the present invention, equivalent replacement, all fall into protection scope of the present invention.
Claims (10)
1. support a method for multi service access and transmission, it is characterized in that, comprising:
At transmitting terminal, the signal of each circuit-switched data business input being changed and decode process, being encapsulated into processing the parallel data obtained in Generic Framing Procedure-transparent transmission GFP-T Frame, and through-rate is allocated and obtained GFP-T data flow; By GFP-T data stream to the light path data cell OPU0 position in light path data cell ODU0; Time slot in divided light transport network OTN frame, and the data in ODU0 are pressed time slot synchronization map to OTN frame, transmit described OTN frame by OTN; Wherein:
The described signal to each circuit-switched data business input changes and process of decoding comprises: by serial parallel/serializer (SERDES), the serial data traffic signal of input is converted to parallel data; The parallel data obtained is converted to 8 8B parallel data streams by physical layer;
At receiving terminal, dock data in the OTN frame received by time slot and carry out demapping, obtain the ODU0 data of each circuit-switched data business; According to obtained ODU0 data acquisition GFP-T data flow, and rate adapted is carried out to this GFP-T data flow obtain GFP-T Frame; Decapsulation is carried out to GFP-T Frame and obtains concurrent service data flow, and send customer provided equipment to by after encoded for described concurrent service data flow and conversion process.
2. the method for support multi service access according to claim 1 and transmission, is characterized in that, described in carry out speed allotment and obtain GFP-T data flow and be:
Distribute to the bandwidth of current data service passage and the degree of depth of fifo fifo unit according to ODU0, in GFP-T Frame, insert or delete idle frame IDLE frame, rate adapted is carried out to the data in GFP-T Frame, form GFP-T data flow.
3. the method for support multi service access according to claim 1 and 2 and transmission, is characterized in that, the ODU0 data acquisition GFP-T data flow that described basis obtains also is carried out rate adapted to this GFP-T data flow and obtained GFP-T Frame and be:
16 row overhead datas before in obtained ODU0 data are removed, obtains GFP-T data flow; Again the IDLE frame in the GFP-T data flow obtained is removed, obtain GFP-T Frame.
4. the method for support multi service access according to claim 1 and 2 and transmission, is characterized in that, describedly transmits OTN frame by OTN and is:
Parallel data in OTN frame is converted to serial data; Electro-optic conversion is carried out to the serial data obtained, converts electrical signals to light signal, and transmit described light signal by OTN.
5. the method for support multi service access according to claim 1 and 2 and transmission, is characterized in that, describedly sends customer provided equipment to by after encoded for described concurrent service data flow and conversion process, comprising:
Physical layer encodes process is carried out to described concurrent service data flow; Parallel serial conversion and opto-electronic conversion are carried out to local parallel data after coding, sends the light signal be converted to customer provided equipment.
6. support a system for multi service access and transmission, it is characterized in that, comprising: transmitting terminal and receiving terminal; Wherein,
Transmitting terminal, for processing the signal of each circuit-switched data business input, be encapsulated in GFP-T Frame by processing the parallel data obtained, through-rate allotment obtains GFP-T data flow, and by GFP-T data stream to the light path data cell OPU0 position in ODU0; And the data in ODU0 are pressed time slot synchronization map to OTN frame, and are transmitted described OTN frame by OTN by the time slot in divided light transport network OTN frame; Wherein, the described signal to the input of each circuit-switched data business is changed and process of decoding comprises: by serial parallel/serializer (SERDES), the serial data traffic signal of input is converted to parallel data; The parallel data obtained is converted to 8 8B parallel data streams by physical layer;
Receiving terminal, for carrying out to data in the OTN frame received the ODU0 data that demapping obtains each circuit-switched data business according to time slot, rate adapted is carried out to this GFP-T data flow obtain GFP-T Frame according to described ODU0 data acquisition GFP-T data flow, decapsulation is carried out to GFP-T Frame and obtains concurrent service data flow, and send customer provided equipment to by after described concurrent service Data Stream Processing.
7. the system of support multi service access according to claim 6 and transmission, is characterized in that, described transmitting terminal comprises: the first processing module, GFP-T framing module, first rate adaptation module, ODU0, OTN framing module; Wherein,
First processing module, for processing the signal of each circuit-switched data business input, particularly, is converted to parallel data by serial parallel/serializer (SERDES) by the serial data traffic signal of input; The parallel data obtained is converted to 8 8B parallel data streams;
GFP-T framing module, is encapsulated in GFP-T Frame for the treatment of the parallel data obtained;
First rate adaptation module, for allocating the speed of data in described GFP-T Frame, and obtains GFP-T data flow;
One ODU0, for by described GFP-T data stream in ODU0;
Data in ODU0, for the time slot in divided light transport network OTN frame, are pressed time slot synchronization map to OTN frame, and are transmitted described OTN frame by OTN by OTN framing module.
8. the system of support multi service access according to claim 7 and transmission, is characterized in that,
Described first processing module also comprises: the first serioparallel exchange unit and the first physical layer processing unit;
First serioparallel exchange unit, for carrying out serial parallel conversion, is converted to parallel data by serial data, particularly, by serial parallel/serializer (SERDES), the serial data traffic signal of input is converted to parallel data;
First physical layer processing unit, for doing the process of physics layer decoder to parallel data, particularly, is converted to 8 8B parallel data streams by the parallel data obtained;
And/or described OTN framing module also comprises: the first parallel serial conversion unit, the first electro-optic conversion and transmitting element; Wherein,
First parallel serial conversion unit, for carrying out Parallel-serial convert to the data in OTN frame, is converted to serial data by parallel data;
First electro-optic conversion and transmitting element, for carrying out electro-optic conversion to the serial data obtained, and send to receiving terminal by the light signal be converted to.
9. the support multi service access according to claim 7 or 8 and the system of transmission, it is characterized in that, described receiving terminal comprises: OTN solution frame module, the 2nd ODU0, the second rate adaptation module, GFP-T separate frame module, the second processing module; Wherein,
OTN separates frame module, for carrying out to data in the OTN frame received the ODU0 data that demapping obtains each circuit-switched data business according to time slot;
2nd ODU0, for according to described ODU0 data acquisition GFP-T data flow;
Second rate adaptation module, obtains GFP-T Frame for carrying out rate adapted to this GFP-T data flow;
GFP-T separates frame module, obtains concurrent service data flow for carrying out decapsulation to GFP-T Frame;
Second processing module, for processing described concurrent service data flow, and sends customer provided equipment to.
10. the system of support multi service access according to claim 9 and transmission, is characterized in that,
Described OTN separates frame module and also comprises: photoelectric conversion unit and the second serioparallel exchange unit; Wherein,
Photoelectric conversion unit, for being converted to the signal of telecommunication by the light signal received;
Second serioparallel exchange unit, for being converted to parallel data by the serial data received;
And/or described second processing module comprises: the second physical layer processing unit, the second parallel serial conversion unit, the second electro-optic conversion and transmitting element; Wherein,
Second physical layer processing unit, for carrying out physical layer encodes process to described concurrent service data flow;
Second parallel serial conversion unit, for carrying out parallel serial conversion to local parallel data after coding;
Second electro-optic conversion and transmitting element, for converting electrical signals to light signal, and send to customer provided equipment by the light signal be converted to.
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| CN200910235670.0A CN101695144B (en) | 2009-10-10 | 2009-10-10 | A kind of method and system supporting multi service access and transmission |
| PCT/CN2010/073093 WO2010145404A1 (en) | 2009-10-10 | 2010-05-21 | Method and system for supporting multi-service access and transmisson |
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| EP4040707A4 (en) * | 2019-11-28 | 2024-03-27 | ZTE Corporation | Data transmission method and apparatus, terminal device, and storage medium |
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| CN101695144B (en) * | 2009-10-10 | 2015-08-12 | 中兴通讯股份有限公司 | A kind of method and system supporting multi service access and transmission |
| WO2012119415A1 (en) | 2011-08-24 | 2012-09-13 | 华为技术有限公司 | Method and device for transporting ultra-high-speed ethernet service |
| EP2665324B1 (en) * | 2011-10-31 | 2018-02-14 | Huawei Technologies Co., Ltd. | Connection establishment method and device for forwarding adjacency - label switched path |
| CN103841014A (en) * | 2012-11-22 | 2014-06-04 | 西安邮电大学 | Odu0 data packet circuit |
| WO2017049546A1 (en) | 2015-09-24 | 2017-03-30 | 华为技术有限公司 | Method for transmitting and receiving optical transport network otn signal, otn device, and system |
| CN106571890A (en) * | 2015-10-12 | 2017-04-19 | 深圳市中兴微电子技术有限公司 | Rate adaptation method and device |
| CN107318057B (en) * | 2017-07-31 | 2023-09-05 | 广东中云海科技有限公司 | Digital baseband signal multiplexing transmission switching matrix system |
| CN107396214B (en) * | 2017-07-31 | 2023-08-18 | 广东中云海科技有限公司 | 128 x 128 path broadband data signal real-time exchange system and exchange method |
| EP4336753A3 (en) | 2018-05-10 | 2024-05-29 | Huawei Technologies Co., Ltd. | Method for processing low-rate service data in optical transport network, apparatus, and system |
| CN111130701A (en) * | 2019-12-31 | 2020-05-08 | 深圳市源拓光电技术有限公司 | Method for automatically adapting rates between Ethernet ports with different rates and optical module |
| CN114189307B (en) * | 2020-09-14 | 2024-02-13 | 中国电信股份有限公司 | OTN signal transmission method and system and OTU0 interface device |
| CN112929765B (en) * | 2021-01-19 | 2023-05-12 | 赵晋玲 | Multi-service transmission method, system and storage medium based on optical transmission network |
| CN114339660B (en) * | 2021-12-02 | 2023-08-18 | 北京理工大学 | Unmanned aerial vehicle cluster random access method |
| CN117692822A (en) * | 2022-09-05 | 2024-03-12 | 华为技术有限公司 | Method, device and system for processing data frames in optical transport network |
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| CN101335750A (en) * | 2007-06-29 | 2008-12-31 | 华为技术有限公司 | Method and apparatus for mapping Ethernet encoding block to transmission of optical network |
| CN101299649A (en) * | 2008-06-19 | 2008-11-05 | 中兴通讯股份有限公司 | Method and device for mixing and concourse of multi-service based on all-purpose framing regulations |
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| WO2010145404A1 (en) | 2010-12-23 |
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