CN100490395C - Method and system for transmitting Ethernet data by optical transmission network and apparatus for transmitting and receiving Ethernet data - Google Patents
Method and system for transmitting Ethernet data by optical transmission network and apparatus for transmitting and receiving Ethernet data Download PDFInfo
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Abstract
The invention discloses one method and system, Ethernet data transmission and receive device to send Ethernet data through light transmission network, which comprises the following steps: processing speed limit on Ethernet data and converting it into OTN standard data structure into OTN network transmission; host end receives and restores the Ethernet data and improves the data for transmission.
Description
Technical field
The present invention relates to field of data transmission, relate in particular to the method and system and Ethernet data transmission and the receiving system that transmit Ethernet data by optical transport network.
Background technology
Optical transport network (OTN, Optical Transport Network), be commonly called as optical-fiber network, it is big to have message capacity, the scheduling of support bulky grain, reliability height, and powerful forward error correction ability are convenient to characteristics such as management, make the OTN network be suitable as bearer network and carry miscellaneous service, and the extensive use of Ethernet, the application of 10G ethernet technology in enterprise that operating rate is improved greatly is growing, has brought new challenge for OTN Network Provider.Because the difference of IEEE and the defined link data speed of ITU-T two big standards systems, making utilizes OTN network carrying Ethernet service to implement very difficult, Ethernet with 10G speed is an example, the speed of the defined 10G local area ethernet of IEEE is 10.3125Gbps, the optical channel Payload Unit of OTN architectural definition (Optical Channel Payload Unit, OPU) comprise optical channel Payload Unit 1 (OPU1), optical channel Payload Unit 2 (OPU2), optical channel Payload Unit 3 (OPU3), the pairing transmission rate grade of each optical channel Payload Unit is 2.5G, 10G, 40G, the cost variance of different rates rank correspondence is very big, therefore carrying the 10G local area ethernet by OPU2 can be both economical, therefore and the rate of loading of optical channel Payload Unit 2 is about 9.9953Gbps in the defined OTN network of ITU-T, the local area ethernet that carries 10G speed by the OPU2 difficulty that becomes.In addition, communications equipment manufacturer tends to utilize the frame gap of Ethernet data or/and leading some privately owned information that transmit of frame, these private informations are not generally externally announced, and, these private informations can not be identified and explain, the information but these information are absolutely necessary again for the collaborative work of manufacturer's internal unit keeps the simplest way of private information, is exactly with its transparent transmission in network.Therefore, overcoming transmission rate difference and the data message that is transmitted is not added modification, modification ground transparent transmission, is to realize utilizing OTN network carrying Ethernet service problem to be solved.
In the prior art, when utilizing OTN network carrying Ethernet service, address the above problem by following scheme:
With the 10G Ethernet service is example, Ethernet data from data equipment is intactly as client's load, transparent mapped is to passing through in the OPU2e container of fixing after filling, fixedly filling herein, be session transmission unit (Optical Channel Transport Unit, OTU) define in the frame structure, purpose is to accomplish when making the low rate rank be multiplexed into the two-forty rank that speed mates fully, and can keep the frame structure of OTU to remain unchanged, the data among the OPU2e enter the OTN network through the encapsulation back by OTU2e and transmit.
Utilize such scheme, because data map is in OPU2e, encapsulate and by in the process of OTU2e, frame structure is constant, but frame frequency improves, so the transmission rate of each link data all has raising, makes the OTU2e that is fit to the Ethernet transmission rate enter the OTN Network Transmission at last, because the raising of transmission rate, the frame gap of Ethernet data is or/and leading some privately owned information that transmit of frame all can be passed through the OTN Network Transmission.
But, adopt such scheme can introduce one and the incompatible speed of OTN system, during the specific implementation of this scheme, the Ethernet service that OTN equipment must be followed the user is adjusted the reference clock of local device, obtaining to adapt to the work clock of local area ethernet, but because the clock schedule requirement of Ethernet is lower, exceeded the patient scope of OTN network self, so Ethernet data when transmitting through the OTN network, must be followed the tracks of by the station, therefore implements relative complex.
In addition, because optical channel transmission unit (Optical Channel Transport Unit, OTU) three ranks are arranged, difference corresponding 2.5G, 10G, 40G speed rank, and the clock of each 10G Ethernet is separate and incomplete same, and the adaptive scope that has exceeded the rate adjustment bytes of OPU2, the OTU3 that therefore adopts the Ethernet data of such scheme can not be multiplexed into the 40G speed grade transmits, and has destroyed existing OTN system.
Summary of the invention
The technical problem that the embodiment of the invention will solve provides a kind of method and system and Ethernet data by optical transport network transmission Ethernet data and sends and receiving system, can make Ethernet data transparent transmission in optical transport network.
For solving the problems of the technologies described above, the purpose of the embodiment of the invention is achieved through the following technical solutions:
The embodiment of the invention provides a kind of method by optical transport network transmission Ethernet data, it is characterized in that, comprising:
To carrying out the Ethernet data after open-loop rate is controlled, when the data occupancy in the push-up storage is higher than first threshold value that presets, then delete the idle information in these data, and will delete the standard data structure that Ethernet data after the idle information is converted into optical transport network, enter the optical transport network transmission;
The standard data structure of the optical transport network that receives is recovered Ethernet data, when the data occupancy in the push-up storage is lower than second threshold value that presets, then in these data, insert idle information, and the Ethernet data after sending this and inserting idle information.
The embodiment of the invention also provides a kind of Ethernet data dispensing device, it is characterized in that, comprising: Rate Adapter Unit, and map unit, load bearing unit becomes frame unit;
Rate Adapter Unit is used to receive Ethernet data, and when the data occupancy in the push-up storage is higher than first threshold value that presets, deletes the idle information in these data, and the data that will delete idle information are sent to map unit;
Map unit, the Ethernet data after the speed limit that is used for being received shines upon into load bearing unit;
Load bearing unit is used to carry Ethernet data;
Become frame unit, be used for load bearing unit is carried out it being transmitted in optical transport network after framing handles.
The embodiment of the invention also provides a kind of Ethernet data receiving system, it is characterized in that, comprising: separate frame unit, separate map unit, Rate Adapter Unit;
Separate frame unit, be used to receive the load bearing unit that process the framing of optical transport network transmission is handled, and this load bearing unit is separated the frame processing;
Separate map unit, be used for separating mapping, recover Ethernet data, and these data are sent to Rate Adapter Unit by the load bearing unit that will separate after frame is handled;
Rate Adapter Unit is used for when the data occupancy of push-up storage is lower than second threshold value that presets, and inserts idle information in the Ethernet data that is received, and the Ethernet data after sending this and inserting idle information.
The embodiment of the invention also provides a kind of system by optical transport network transmission Ethernet data, it is characterized in that, comprising: first data equipment, Ethernet data dispensing device, Ethernet data receiving system, second data equipment;
First data equipment after being used for Ethernet data to needs transmission and carrying out open-loop rate control, is sent to the Ethernet data dispensing device with this Ethernet data;
The Ethernet data dispensing device, the Ethernet data that is used for being received carries out the speed adjustment, and after adjusted this data conversion of speed is the standard data structure of OTN, carrying these data transmits in OTN, described speed adjustment comprises: when the data occupancy in the push-up storage is higher than first threshold value that presets, then delete the idle information in these data;
The Ethernet data receiving system, be used to receive and recover the Ethernet data that the OTN network transmits, and these data are carried out after speed adjusts, be sent to second data equipment, described speed adjustment comprises: when the data occupancy in the push-up storage is lower than second threshold value that presets, then insert idle information in these data;
Second data equipment is used for the Ethernet data that receives is handled.
Above technical scheme as can be seen, because the scheme in the embodiment of the invention is carried out speed limit by the idle information in the deletion Ethernet data to these data, the rate limit of Ethernet data is being carried within the carrying scope of this data message at the carrying container of OTN Network Transmission, and be to enter the OTN Network Transmission after the standard data structure of OTN with this data conversion after the speed limit, after the place termination is received and is recovered Ethernet data, the transmission rate of data is improved, satisfy the ethernet standard member and handle the requirement of Ethernet data, wherein, because to the Ethernet data speed limit is by the idle information in the deleted data, after Su Duan recovers Ethernet data, again by data recovered being inserted idle information to improve the speed of data, and do not change valid data in the data, therefore realized the transparent transmission of Ethernet valid data in the OTN network.
In addition, Ethernet data is being carried out in the process of speed limit, by deleting the idle information in these data, and keeping frame gap in these data or/and leading some privately owned information that transmit of frame, therefore, also realized the transmission of private information in the Ethernet data.
Description of drawings
Fig. 1 is the flow chart by the method embodiment of optical transport network transmission Ethernet data;
Fig. 2 is the example structure figure of Ethernet data dispensing device;
Fig. 3 is the example structure figure of Ethernet data receiving system;
Fig. 4 is the structure chart by first embodiment of system of optical transport network transmission Ethernet data;
Fig. 5 is the structure chart by second embodiment of system of optical transport network transmission Ethernet data.
Embodiment
For making purpose of the present invention, scheme and advantage clearer, it is elaborated below in conjunction with specific embodiment and with reference to accompanying drawing.
Referring to accompanying drawing 1, the method for passing through optical transport network transmission Ethernet data that the embodiment of the invention provided, idiographic flow comprises:
Step 101: to the Ethernet data open-loop rate control of needs transmission;
Wherein, Ethernet data is carried out speed limit can be controlled by open-loop rate according to the parameter that presets and realize, with the 10G Ethernet is example: 10G Ethernet interface speed is 10.3125Gbps, if the open-loop rate parameter that presets is 104bit, the data of then every transmission 104bit just need to insert the idle data of 8bit, so, calculate in proportion, the actual valid data that send are exactly 10.3125* (104/ (104+8))=9.576 (Gbps), thus, make that the speed of the valid data that transmitted reduces under the constant situation of the Ethernet data physical rate that keeps being transmitted;
Wherein, preset parameter described in the open-loop rate control can be according to the difference of the OPU container that carries Ethernet data, and adjust in advance, for example: Chuan Shu Ethernet data need be carried to the OPU1 container of 2.488Gbps if desired, then can calculate the parameter that need preset and be about 2.54 by 10.3125* (x/ (x+8))=2.488, then the ratio of valid data and idle character is 2.54:8, getting approximate integer in proportion and guarantee that idle data is the integral multiple of 8bit, can be to operate according to every transmission 127bit data are inserted 400bit in the frame gap position idle data;
This step is carried out speed limit to the valid data in the described Ethernet data, can both pass through the OTN network for guaranteeing all valid data;
Step 102: by deleting through the idle information in the Ethernet data after the speed limit to carrying out the physical rate adjustment with big netting index certificate;
Wherein, described idle information is the specific character that defines in the standard, and it can be idle IDLE character, or orderly character set (sequence order-set character set) continuous and that repeat;
By the idle information in the deleted data, make the data bits that in the unit interval, transmits reduce, reduce and reach the transmission rate that makes whole Ethernet data, satisfy the bearing capacity of carrying container;
Wherein, described carrying container can be OPU;
Wherein, judging needs deletion how many idle information, could satisfy the bearing capacity of carrying container, can be by push-up storage (the first in first out that is communicated with carrying container, FIFO) the full state of sky is judged, deletes idle information to first threshold value that presets; When data occupancy is higher than first threshold value that presets, deletes idle information, otherwise do not delete idle information; Wherein, described first threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of supporting of Ethernet and carrying container;
Step 103: with the Ethernet data after the rate adapted, the laggard light inlet of standard data structure that is converted into OTN transmits network and transmits;
Wherein, described Ethernet data being converted into the standard data structure of OTN can be by advancing this data map carrying container and this carrying container being carried out framing handle and finish;
Wherein, described framing is handled and is finished by framer FRAMER;
Step 104: after receiving the standard data structure of OTN, this information is recovered Ethernet data;
Wherein, can by separating frame, separate mapping and recover Ethernet data by data message described reception;
Step 105: the Ethernet data that recovers is adjusted this data rate and sent the adjusted data of this speed by inserting idle information;
Wherein, be sent to the standard element continuation processing of Ethernet through the adjusted data of speed;
Wherein, described idle information is the specific character that defines in the standard, and it can be idle IDLE character, or orderly character set sequence order-set character set continuous and that repeat;
System reduces the transmission rate of Ethernet data to eliminate the transfer of data difference between Ethernet and the OTN network, but after the place termination is received data, need recover Ethernet data, the adjustment of the scanning frequency of going forward side by side rate makes data continue by the standard element of Ethernet to handle;
Wherein, insert idle information, make the data bits that in the unit interval, transmits increase, improve the transmission rate of these data by frame gap in data; With the 10G Ethernet is example:
For satisfying the bearing capacity of the OPU container among the OTN, the speed of Ethernet data is adjusted to 9.9953Gbps from 10.3125Gbps, therefore the Ethernet data speed that recovers in Su Duancong OPU2 is 9.9953Gbps, and the data rate that place end Ethernet sends is 10.3125Gbps, so, for making data continue to transmit by Ethernet, just the speed of the Ethernet data that the place end need be recovered improves the difference of offset data speed;
Wherein, judging needs how many idle information of inserting, and could satisfy the rate requirement that Ethernet transmits, and can judge by full state by the sky of memory FIFO, inserts idle information to second threshold value that presets; When data occupancy is lower than second threshold value that presets, inserts idle information, otherwise do not insert idle information; Wherein, described second threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of supporting of Ethernet and carrying container.
Referring to Fig. 2, for realizing said method, the embodiment of the invention also provides a kind of Ethernet data dispensing device, and the embodiment of this device comprises: Rate Adapter Unit, and map unit, load bearing unit becomes frame unit;
Described Rate Adapter Unit 201 is used to receive Ethernet data, and by the idle information of deleting in these data this Ethernet data is carried out speed limit, and the Ethernet data after the speed limit is sent to map unit;
Wherein, described idle information is the specific character that defines in the standard, and it can be the IDLE character, or sequence order-set character/collection continuous and that repeat;
By the idle information in the deleted data, make the data bits that in the unit interval, transmits reduce, reduce and reach the transmission rate that makes whole Ethernet data, satisfy the bearing capacity of load bearing unit;
Wherein, judge to need deletion how many idle information, could satisfy the bearing capacity of load bearing unit, sky that can be by the memory FIFO that is communicated with load bearing unit completely state is judged, deletes idle information to first threshold value that presets; When data occupancy is higher than first threshold value that presets, deletes idle information, otherwise do not delete idle information; Wherein, described first threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of supporting of Ethernet and load bearing unit;
Described load bearing unit 203 is used to carry Ethernet data;
Described one-tenth frame unit 204 is used for load bearing unit is carried out it being transmitted in the OTN network after framing handles;
Wherein, the load bearing unit after framing is handled finally is converted into the standard data structure of OTN.
Referring to Fig. 3, the embodiment of the invention also provides a kind of Ethernet data receiving system, and the embodiment of this device comprises: separate frame unit, separate map unit, Rate Adapter Unit;
Wherein, the described frame unit 301 of separating is used to receive the load bearing unit that the process framing of OTN Network Transmission is handled, and this load bearing unit is separated frame handle;
Wherein, described idle information is the specific character that defines in the standard, and it can be the IDLE character, or sequence order-set character/collection continuous and that repeat;
The Ethernet data receiving system need recover Ethernet data after receiving data, the adjustment of the scanning frequency of going forward side by side rate makes data continue by the standard element of Ethernet to handle;
Wherein, insert idle information, make the data bits that in the unit interval, transmits increase, improve the transmission rate of these data by frame gap in data; With the 10G Ethernet is example:
For satisfying the bearing capacity of the OPU container among the OTN, the speed of Ethernet data is adjusted to 9.9953Gbps from 10.3125Gbps, therefore the Ethernet data speed that recovers in Su Duancong OPU2 is 9.9953Gbps, and the data rate that place end Ethernet sends is 10.3125Gbps, so, for making data continue to transmit by Ethernet, just the speed of the Ethernet data that the place end need be recovered improves the difference of offset data speed;
Wherein, judging needs how many idle information of inserting, and could satisfy the rate requirement that Ethernet transmits, and can judge by full state by the sky of memory FIFO, inserts idle information to second threshold value that presets; When data occupancy is lower than second threshold value that presets, inserts idle information, otherwise do not insert idle information; Wherein, described second threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of holding of Ethernet and load bearing unit.
Referring to Fig. 4, for realizing said method, the embodiment of the invention also provides a kind of system by optical transport network transmission Ethernet data, and this system comprises: first data equipment, Ethernet data dispensing device, Ethernet data receiving system, second data equipment;
Wherein, first data equipment 401 is used for the Ethernet data of needs transmission is carried out speed limit, and the Ethernet data after the speed limit is sent to the Ethernet data dispensing device;
Wherein, Ethernet data is carried out speed limit can be controlled by open-loop rate according to the parameter that presets and realize, with the 10G Ethernet is example: 10G Ethernet interface speed is 10.3125Gbps, if the open-loop rate parameter that presets is 104bit, the data of then every transmission 104bit just need to insert the idle data of 8bit, so, calculate in proportion, the actual valid data that send are exactly 10.3125* (104/ (104+8))=9.576 (Gbps), thus, make that the speed of the valid data that transmitted reduces under the constant situation of the Ethernet data overall rate that keeps being transmitted;
Wherein, preset parameter described in the open-loop rate control can be according to the difference of the OPU container that carries Ethernet data, and adjust in advance, for example: Chuan Shu Ethernet data need be carried to the OPU1 container of 2.488Gbps if desired, then can calculate the parameter that need preset and be about 2.54 by 10.3125* (x/ (x+8))=2.488, then the ratio of valid data and idle character is 2.54:8, getting approximate integer in proportion and guarantee that idle data is the integral multiple of 8bit, can be to operate according to every transmission 127bit data are inserted 400bit in the frame gap position idle data;
This step is carried out speed limit to the valid data in the described Ethernet data, can both pass through the OTN network for guaranteeing all valid data;
Ethernet data dispensing device 402, the Ethernet data that is used for being received carries out the speed adjustment, and after adjusted this data conversion of speed is the standard data structure of OTN, carries these data and transmit in OTN;
Wherein, the Ethernet data dispensing device specifically comprises: the first rate adaptation unit, and map unit becomes frame unit, load bearing unit;
Described first rate adaptation unit 4021 is used to receive Ethernet data, and by the idle information of deleting in these data this Ethernet data is carried out speed limit, and the Ethernet data after the speed limit is sent to map unit;
Wherein, described idle information is the specific character that defines in the standard, and it can be the IDLE character, or sequence order-set character/collection continuous and that repeat;
By the idle information in the deleted data, make the data bits that in the unit interval, transmits reduce, reduce and reach the transmission rate that makes whole Ethernet data, satisfy the bearing capacity of OPU container;
Wherein, judge to need deletion how many idle information, could satisfy the bearing capacity of OPU container, sky that can be by the memory FIFO that is communicated with load bearing unit completely state is judged, deletes idle information to first threshold value that presets; When data occupancy is higher than first threshold value that presets, deletes idle information, otherwise do not delete idle information; Wherein, described first threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of supporting of Ethernet and load bearing unit;
Described load bearing unit 4023 is used to carry Ethernet data;
Described one-tenth frame unit 4024 is used for load bearing unit is carried out it being transmitted in the OTN network after framing handles;
Ethernet data receiving system 403 is used to receive and recover the Ethernet data that the OTN network transmits, and these data are carried out being sent to second data equipment after speed adjusts;
Wherein, described Ethernet data receiving system specifically comprises: separate frame unit, separate map unit, second Rate Adapter Unit;
Wherein, the described frame unit 4031 of separating is used to receive the load bearing unit that the process framing of OTN Network Transmission is handled, and this load bearing unit is separated frame handle;
Wherein, described load bearing unit can be OPU;
Second Rate Adapter Unit 4033 is used for inserting idle information at the Ethernet data that is received and adjusts data rate, and the adjusted Ethernet data of this speed is sent to second data equipment;
Wherein, described idle information is the specific character that defines in the standard, and it can be the IDLE character, or sequence order-set character/collection continuous and that repeat;
The Ethernet data receiving system need recover Ethernet data after receiving data, the adjustment of the scanning frequency of going forward side by side rate makes data continue by the standard element of Ethernet to handle;
Wherein, insert idle information, make the data bits that in the unit interval, transmits increase, improve the transmission rate of these data by frame gap in data;
Wherein, judging needs how many idle information of inserting, and could satisfy the rate requirement that Ethernet transmits, and can judge by full state by the sky of memory FIFO, inserts idle information to second threshold value that presets; When data occupancy is lower than second threshold value that presets, inserts idle information, otherwise do not insert idle information; Wherein, described second threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of supporting of Ethernet and load bearing unit;
Wherein, because the Ethernet data that second data equipment is received has been the Ethernet data of standard, therefore, this equipment can be according to the Ethernet working method work of standard;
Wherein, first data equipment described in the said system and Ethernet data dispensing device can integrate, and second data equipment and Ethernet data receiving system can integrate;
Owing to often utilize PHY conduct physical channel between the two in the existing Ethernet data transmission system, therefore adopt PHY to connect first data equipment and Ethernet data dispensing device, adopt PHY to connect second data equipment and Ethernet data receiving system, can reduce the cost of the system reform;
Therefore, referring to Fig. 5, the embodiment of the invention also provides a kind of system by optical transport network transmission Ethernet data, this system comprises: first data equipment, a PHY unit, Ethernet data dispensing device, the Ethernet data receiving system, the 2nd PHY unit, second data equipment;
Wherein, first data equipment 501 is used for the Ethernet data of needs transmission is carried out speed limit, and the Ethernet data after the speed limit is sent to a PHY unit;
Wherein, Ethernet data is carried out speed limit can be controlled by open-loop rate according to the parameter that presets and realize, with the 10G Ethernet is example: 10G Ethernet interface speed is 10.3125Gbps, if the open-loop rate parameter that presets is 104bit, the data of then every transmission 104bit just need to insert the idle data of 8bit, so, calculate in proportion, the actual valid data that send are exactly 10.3125* (104/ (104+8))=9.576 (Gbps), thus, make that the speed of the valid data that transmitted reduces under the constant situation of the Ethernet data overall rate that keeps being transmitted;
Wherein, preset parameter described in the open-loop rate control can be according to the difference of the OPU container that carries Ethernet data, and adjust in advance, for example: Chuan Shu Ethernet data need be carried to the OPU1 container of 2.488Gbps if desired, then can calculate the parameter that need preset and be about 2.54 by 10.3125* (x/ (x+8))=2.488, then the ratio of valid data and idle character is 2.54:8, getting approximate integer in proportion and guarantee that idle data is the integral multiple of 8bit, can be to operate according to every transmission 127bit data are inserted 400bit in the frame gap position idle data;
This step is carried out speed limit to the valid data in the described Ethernet data, can both pass through the OTN network for guaranteeing all valid data;
The one PHY unit 502, the Ethernet data that is used for being received is sent to the Ethernet data dispensing device;
Wherein, IEEE802.3 has defined two kinds of physical layer entity, corresponding local area ethernet interface and ethernet wan interface, the optical interface speed of WAN PHY is 9.95328Gbps, and Lan PHY optical interface speed is 10.3125Gbps, therefore, when the Ethernet data by Lan PHY transmission transmits by optical transport network, need adjust the speed of transmission data, to eliminate speed difference, a described PHY unit can be Lan PHY unit;
Ethernet data dispensing device 503, the Ethernet data that is used for being received carries out the speed adjustment, and after adjusted this data conversion of speed is the standard data structure of OTN, carries these data and transmit in OTN;
Wherein, the Ethernet data dispensing device specifically comprises: the first rate adaptation unit, and map unit, load bearing unit becomes frame unit;
Described first rate adaptation unit 5031 is used to receive Ethernet data, and by the idle information of deleting in these data this Ethernet data is carried out speed limit, and the Ethernet data after the speed limit is sent to map unit;
Wherein, described idle information is the specific character that defines in the standard, and it can be the IDLE character, or sequence order～set character/collection continuous and that repeat;
By the idle information in the deleted data, make the data bits that in the unit interval, transmits reduce, reduce and reach the transmission rate that makes whole Ethernet data, satisfy the bearing capacity of load bearing unit;
Wherein, judge to need deletion how many idle information, could satisfy the bearing capacity of OPU container, sky that can be by the memory FIFO that is communicated with load bearing unit completely state is judged, deletes idle information to first threshold value that presets; When data occupancy is higher than first threshold value that presets, deletes idle information, otherwise do not delete idle information; Wherein, described first threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of supporting of Ethernet and load bearing unit;
Map unit 5032 is used for the Ethernet data after the reception speed limit is shone upon into load bearing unit;
Described load bearing unit 5033 is used to carry Ethernet data;
Described framing frame unit 5034 is used for load bearing unit is carried out it being transmitted in the OTN network after framing handles;
Wherein, a described PHY unit can comprise two Lan PHY, and one is arranged in first data equipment, and one is arranged in the Ethernet data dispensing device;
Ethernet data receiving system 504 is used to receive and recover the Ethernet data that the OTN network transmits, and these data are carried out being sent to second data equipment after speed adjusts;
Wherein, described Ethernet data receiving system specifically comprises: separate frame unit, separate map unit, second Rate Adapter Unit;
Wherein, the described frame unit 5041 of separating is used to receive the load bearing unit that the process framing of OTN Network Transmission is handled, and this load bearing unit is separated frame handle;
Separate map unit 5042, be used for separating mapping, recover Ethernet data, and these data are sent to second Rate Adapter Unit by the load bearing unit that will separate after frame is handled;
Second Rate Adapter Unit 5043 is used for inserting idle information at the Ethernet data that is received and adjusts data rate, and the adjusted Ethernet data of this speed is sent to the 2nd PHY unit;
Wherein, described idle information is the specific character that defines in the standard, and it can be the IDLE character, or sequence order-set character/collection continuous and that repeat;
The Ethernet data receiving system need recover Ethernet data after receiving data, the adjustment of the scanning frequency of going forward side by side rate makes data continue by the standard element of Ethernet to handle;
Wherein, insert idle information, make the data bits that in the unit interval, transmits increase, improve the transmission rate of these data by frame gap in data;
Wherein, judging needs how many idle information of inserting, and could satisfy the rate requirement that Ethernet transmits, and can judge by full state by the sky of memory FIFO, inserts idle information to second threshold value that presets; When data occupancy is lower than second threshold value that presets, inserts idle information, otherwise do not insert idle information; Wherein, described second threshold value can decide according to the data rate deviation and the maximum Ethernet frame length of supporting of Ethernet and load bearing unit;
The 2nd PHY unit 505 is used to receive the Ethernet data that the Ethernet data receiving system sends, and these data is sent to second data equipment;
Wherein, the 2nd PHY unit can be Lan PHY unit;
Second data equipment 506 is used for the Ethernet data that is received is continued to handle;
Wherein, because the Ethernet data that second data equipment is received has been the Ethernet data of standard, therefore, this equipment can be according to the Ethernet working method work of standard;
Wherein, the 2nd PHY unit can be two, and one is arranged in second data equipment, and one is arranged in the Ethernet data receiving system;
Wherein, the system that passes through optical transport network transmission Ethernet data that the embodiment of the invention provided, also can be only at a side Applied Physics layer entity PHY of OTN network, connect data equipment and Ethernet data dispensing device or Ethernet data receiving system by PHY, adopt the asymmetric application of this kind PHY, concrete connection can be referring to the foregoing description;
Above technical scheme as can be seen, because the scheme in the embodiment of the invention is carried out speed limit by the idle information in the deletion Ethernet data to these data, the rate limit of Ethernet data is being carried within the carrying scope of this data message at the carrying container of OTN Network Transmission, and be to enter the OTN Network Transmission after the standard data structure of OTN with this data conversion after the speed limit, after the place termination is received and is recovered Ethernet data, the transmission rate of data is improved, satisfy the ethernet standard member and handle the requirement of Ethernet data, wherein, because to the Ethernet data speed limit is by the idle information in the deleted data, after Su Duan recovers Ethernet data, again by data recovered being inserted idle information to improve the speed of data, and do not change valid data in the data, therefore realized the transparent transmission of Ethernet valid data in the OTN network.
In addition, Ethernet data is being carried out in the process of speed limit, by deleting the idle information in these data, and keeping frame gap in these data or/and leading some privately owned information that transmit of frame, therefore, also realized the transmission of private information in the Ethernet data.
More than a kind ofly to the embodiment of the invention provided transmit the method and system of Ethernet data and Ethernet data sends and receiving system is described in detail by optical transport network, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (9)
1, a kind of method by optical transport network transmission Ethernet data is characterized in that, comprising:
To carrying out the Ethernet data after open-loop rate is controlled, when the data occupancy in the push-up storage is higher than first threshold value that presets, then delete the idle information in this Ethernet data, and the Ethernet data that will delete after the idle information is mapped to the optical channel Payload Unit, and this optical channel Payload Unit is carried out framing handle, enter the optical transport network transmission;
The optical channel Payload Unit that the process framing that receives is handled is separated the frame processing, optical channel Payload Unit after separating frame and handling is separated mapping obtain Ethernet data, when the data occupancy in the push-up storage is lower than second threshold value that presets, then in this Ethernet data, insert idle information, and the Ethernet data after sending this and inserting idle information.
2, the method by optical transport network transmission Ethernet data according to claim 1 is characterized in that, in this method, described idle information comprises idle character or orderly character set.
3, the method by optical transport network transmission Ethernet data according to claim 1 is characterized in that, in this method:
The Ethernet data that needs is transmitted according to the parameter that presets carries out open-loop rate control.
4, a kind of Ethernet data dispensing device is characterized in that, comprising: Rate Adapter Unit, and map unit, load bearing unit becomes frame unit;
Rate Adapter Unit, be used to receive Ethernet data, and when the data occupancy in the push-up storage is higher than first threshold value that presets, delete the idle information in this Ethernet data, and the Ethernet data that will delete idle information is sent to map unit;
Map unit, the Ethernet data after the speed limit that is used for being received shines upon into load bearing unit;
Load bearing unit is used to carry Ethernet data;
Become frame unit, be used for load bearing unit is carried out it being transmitted in optical transport network after framing handles.
5, a kind of Ethernet data receiving system is characterized in that, comprising: separate frame unit, separate map unit, Rate Adapter Unit;
Separate frame unit, be used to receive the load bearing unit that process the framing of optical transport network transmission is handled, and this load bearing unit is separated the frame processing;
Separate map unit, be used for separating mapping, recover Ethernet data, and this Ethernet data is sent to Rate Adapter Unit by the load bearing unit that will separate after frame is handled;
Rate Adapter Unit is used for when the data occupancy of push-up storage is lower than second threshold value that presets, and inserts idle information in the Ethernet data that is received, and the Ethernet data after sending this and inserting idle information.
6, a kind of system by optical transport network transmission Ethernet data is characterized in that, comprising: first data equipment, Ethernet data dispensing device, Ethernet data receiving system, second data equipment;
First data equipment after being used for Ethernet data to needs transmission and carrying out open-loop rate control, is sent to the Ethernet data dispensing device with this Ethernet data;
The Ethernet data dispensing device, the Ethernet data that is used for being received carries out the speed adjustment, and after adjusted this Ethernet data of speed is converted into the standard data structure of optical transport network, carrying this Ethernet data transmits in optical transport network, described speed adjustment comprises: when the data occupancy in the push-up storage is higher than first threshold value that presets, then delete the idle information in this Ethernet data;
The Ethernet data receiving system, be used to receive and recover the Ethernet data that optical transport network transmits, and this Ethernet data carried out after speed adjusts, be sent to second data equipment, described speed adjustment comprises: when the data occupancy in the push-up storage is lower than second threshold value that presets, then insert idle information in this Ethernet data;
Second data equipment is used for the Ethernet data that receives is handled.
7, the system by optical transport network transmission Ethernet data according to claim 6 is characterized in that:
Described Ethernet data dispensing device comprises: the first rate adaptation unit, and map unit, load bearing unit becomes frame unit;
Described Ethernet data receiving system comprises: separate frame unit, separate map unit, second Rate Adapter Unit;
The first rate adaptation unit is used to receive Ethernet data, and deletes the idle information in this Ethernet data, and the Ethernet data that will delete after the idle information is sent to map unit;
Map unit, the Ethernet data after the speed limit that is used for being received shines upon into load bearing unit;
Load bearing unit is used to carry Ethernet data;
Become frame unit, be used for load bearing unit is carried out it being transmitted in optical transport network after framing handles;
Separate frame unit, be used to receive the load bearing unit that process the framing of optical transport network transmission is handled, and this load bearing unit is separated the frame processing;
Separate map unit, be used for separating mapping, recover Ethernet data, and this Ethernet data is sent to second Rate Adapter Unit by the load bearing unit that will separate after frame is handled;
Second Rate Adapter Unit be used for inserting idle information at the Ethernet data that is received, and the Ethernet data that will insert after the idle information is sent to second data equipment.
8, according to claim 6 or 7 described systems, it is characterized in that by optical transport network transmission Ethernet data:
Described first data equipment and Ethernet data dispensing device integrate, or/and described second data equipment and Ethernet data receiving system integrate.
9, according to claim 6 or 7 described systems, it is characterized in that, further comprise in this system by optical transport network transmission Ethernet data:
The first physical layer entity unit, the Ethernet data that first data equipment that is used for being received sends is sent to the Ethernet data dispensing device;
Or/and the second physical layer entity unit is used to receive the Ethernet data that the Ethernet data receiving system sends, and this Ethernet data is sent to second data equipment.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2007100050246A CN100490395C (en) | 2007-02-09 | 2007-02-09 | Method and system for transmitting Ethernet data by optical transmission network and apparatus for transmitting and receiving Ethernet data |
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| CNB2007100050246A CN100490395C (en) | 2007-02-09 | 2007-02-09 | Method and system for transmitting Ethernet data by optical transmission network and apparatus for transmitting and receiving Ethernet data |
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| CN101355821B (en) * | 2008-09-03 | 2011-07-13 | 中兴通讯股份有限公司 | Method and apparatus for transmitting 10G bit optical fiber channel service in optical transmission network |
| EP2341661B1 (en) * | 2010-01-04 | 2012-03-21 | Alcatel Lucent | Neighbour discovery for ethernet private line on user network interfaces |
| CN102811171B (en) * | 2012-07-25 | 2015-08-19 | 华为技术有限公司 | A kind of transmitting method, Apparatus and system |
| CN106506110B (en) * | 2015-09-06 | 2020-05-29 | 中兴通讯股份有限公司 | Statistical multiplexing optical transport network method and device |
| CN107925635A (en) * | 2015-09-24 | 2018-04-17 | 华为技术有限公司 | A kind of method for sending and receiving optical transfer network OTN signals, OTN equipment and system |
| CN109254721B (en) * | 2017-07-12 | 2024-04-05 | 中兴通讯股份有限公司 | Flexible Ethernet data crossing method, transmission device and storage medium |
| CN110460405B (en) * | 2018-05-07 | 2021-04-09 | 华为技术有限公司 | Service signal transmission method and device |
| CN113993010B (en) * | 2021-10-11 | 2023-07-21 | 芯河半导体科技(无锡)有限公司 | Efficient Xepon olt downlink transmission control method |
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