CN101567726A - Method for processing frame data, optical network unit, optical line terminal and optical network system - Google Patents
Method for processing frame data, optical network unit, optical line terminal and optical network system Download PDFInfo
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Abstract
The embodiment of the invention discloses a method for processing frame data, which comprises the following steps: setting an identification field in a frame structure of the frame data to be transmitted; and sending the frame data with the identification field to a receiving end for identification processing, wherein the identification field is used for representing the frame characteristics of the frame data in different optical network systems. The embodiment of the invention also discloses an optical network unit, an optical line terminal and an optical network system. In the embodiment of the invention, the identification field is set in the frame data to be transmitted so as to ensure that an OLT at the receiving end can identify the frame type of the frame data according to the identification field and can effectively differentiate the frame data belonging to different systems so as to avoid system errors and service interruption.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of processing method, optical network unit, optical line terminal and optical network system of frame data.
Background technology
Along with declining to a great extent of PON (Passive Optical Network, EPON) cost, PON becomes the optimal selection that operator solves last kilometer problem gradually.Current main PON technology is based on TDM (Time Division Multiplex, time division multiplexing), BPON (Broadband Passive OpticalNetwork for example, broadband passive optical network), EPON (Ethernet Based Passive Optical Network, Ethernet passive optical network), APON (Asynchronous Transfer Mode Passive Optical Network, the asynchronous transmission EPON) and GPON (Gigabit-capable Passive Optical Network, Gigabit Passive Optical Network) etc.
PON technology based on TDM is the light access technology of a kind of point to multileaving, with GPON is example, the GPON system mainly comprises: place the CO of operator (Central Office, central office side) OLT (OpticalLine Terminator, optical line terminal), the ODN that constitutes by the branched power device (Optical DistributionNetwork, Optical Distribution Network) and place the ONU (Optical Network Unit, optical network unit) of user side.The downlink data of OLT is transferred to each ONU by the mode of TDM, and each ONU receives one's own downlink data according to the sign in the downlink data.The upstream data of ONU is by TDMA (Time DivisionMultiplex Address, time division multiple access) mode is transferred to OLT, each ONU is by carrying DBA (Dynamic Bandwidth Allocation in the signal that is transferred to OLT in the current period, Dynamic Bandwidth Allocation) request message information asks next period to send the bandwidth resources of signal to OLT, the DBA information that OLT carries in the segment signal when current according to each ONU, the bandwidth authorizing of distributing next period for each ONU, the shared time slot of uplink signal just, each ONU sends signal at next period OLT in the time slot of burst mode in appointment, carries out transmitting uplink data.
But along with digital TV in high resolution, game on line, VOIP (Voice Over Internet Protocol, the audio communication procotol) rise of new business such as voice, the user huge growth occurs to the demand of bandwidth, but the bandwidth that current PON network is provided can not satisfy user's demand.In order to address this problem, proposed bigger bandwidth, the NG-PON of high power capacity (Next Generation Passive OpticalNetwork, EPON of new generation) more, the enforcement of this network need be upgraded to existing P ON network.In numerous schemes, usually can relate to the coexistence of the existing PON network equipment and the NG-PON network equipment to existing PON network upgrade.Certainly the combination of its existence is not limited thereto, and the not transitional systems such as OLT end situation of existing PON may occur.
But in the network system of this coexistence, if there is the OLT of existing PON, the ONU of existing PON system still be functions such as the activation of ONU in the NG-PON system and DBA all be that OLT by existing PON system handles; And the OLT of NG-PON system also receives the frame data that ONU sends in the ONU of existing PON system and the NG-PON system simultaneously; That is to say that the OLT in this coexistence optical-fiber network can receive dissimilar frame numbers, when OLT in the optical network system receives when not belonging to the frame data that send with the ONU of self same system, the mistake that then may occur causing because can't distinguish is handled, thereby produce alarm, cause system's cisco unity malfunction, even professional interruption occurs.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of processing method, optical network unit and optical line terminal of frame data is provided.Can belong to the frame data of different system by active zone, thereby avoid system to make mistakes and service disconnection.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of processing method of frame data, and this method comprises:
In the frame structure of frame data to be transmitted identification field is set, described identification field is used for characterizing the frame characteristic of different optical network system frame data;
The described frame data that are provided with identification field are sent to receiving terminal discern processing.
Accordingly, the embodiment of the invention provides a kind of optical network unit, and this optical network unit comprises:
Sign is provided with the unit, and this unit is used at frame data waiting for transmission identification field being set;
Transmitting element, this unit are used for that described sign is provided with frame data that the unit is provided with identification field and send to transmission network and carry out transfer of data.
Accordingly, the embodiment of the invention provides a kind of optical line terminal, and this optical line terminal comprises:
Receiving element, this unit is used for receiving the frame data of transmission network;
Recognition unit, this unit are used to discern the frame type of the frame data that described receiving element receives.
Accordingly, the embodiment of the invention provides a kind of optical network system, and this system comprises:
Optical network unit, described optical network unit are used at frame data waiting for transmission identification field being set, and the frame data that are provided with identification field send to transmission network and carry out transfer of data;
Optical line terminal, described optical line terminal is connected with described optical network unit by remote node, is used for discerning according to the identification field of frame data the frame type of the frame data that receive from transmission network.
The embodiment of the invention is by being provided with identification field at the ONU end in frame data waiting for transmission, make the OLT of receiving terminal can discern the data type of these frame data according to identification field, current like this PON can effectively finish functions such as the activation of ONU and DBA, and can not produce mistake and handle; NG-PON can select corresponding frame data to handle according to identification field, if can compatible processing the frame data of existing PON, can be distributed to different logical process according to identification field so, thereby the appearance of avoiding mistake to handle can avoid alarming the phenomenon of the system's cisco unity malfunction that causes and professional interruption.
Description of drawings
Fig. 1 is the uplink frame structural representation of existing GPON;
Fig. 2 inserts the uplink frame structural representation of identification field for the embodiment of the invention;
Fig. 3 is the method flow diagram of embodiment of the invention achieve frame data processing;
Fig. 4 is the optical network system structural representation of embodiment of the invention achieve frame data processing;
Fig. 5 is the structural representation of embodiment of the invention optical network unit;
Fig. 6 is the structural representation of embodiment of the invention optical line terminal.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the embodiment of the invention is described in further detail below in conjunction with accompanying drawing.
See also Fig. 3, Fig. 3 is the method flow diagram of embodiment of the invention achieve frame data processing, and present embodiment is that example describes with up frame data.As shown in Figure 3, this method specifically comprises:
Step S101 is provided with the identification field that characterizes the frame characteristic in the frame structure of frame data to be transmitted.Uplink frame structure with GPON is an example, see also shown in Figure 1, Fig. 1 is the uplink frame structural representation of existing GPON, this uplink frame comprises: PLOu (Physical Layer Overhead upstream, the upstream physical layer expense) field, PLOAMu (Physical Layer Operations, Administration and Maintenanceupstream, the ascending physical signal layer operation, management and maintenance) field, PLSu (Power Leveling Sequenceupstream, ascending power is measured sequence) field, DBRu (Dynamic Bandwidth Report upstream, up dynamic bandwidth request) field and Payload (load) field.In the middle of DBRu field and Payload field, insert BSCu (Bit Speed Compatible upstream, the bit rate compatibility) field is as identification field, see also shown in Figure 2, Fig. 2 inserts the uplink frame structural representation of identification field for the embodiment of the invention, as shown in Figure 2, this field structurally is to have inserted the BSCu field with the difference of existing GPON frame structure, contains the information of the frame type that characterizes these frame data in the BSCu field.In the present embodiment, the length of BSCu field is 5 bytes, be worth to be 0xB6AB31E055, i.e. and idle (free time) frame head that G.984.3 defines in the standard, characterizing the frame data that contain this field is the frame data of NG-PON system.Be that example describes as identification field only with the BSCu field in the GPON system herein, can also adopt other fields in actual the use in current PON standard definition, when not handling loading section, also need this field to have to allow OLT stop the attribute that the data of identification field back are handled, current PON system comprises: BPON, EPON, APON and GPON etc.
Certainly be identification field except adopting field in current PON standard definition, can also insert the field that communicating pair is made an appointment, the field that the field that described communicating pair is made an appointment is meant in the existing frame data communication protocol of not being present in of communicating pair use and communicating pair all can be discerned.Can be pre-defined in optical network unit and optical line terminal in advance, comprise the title of field and attribute etc.
In addition, can also at original Field Definition of frame data identification field, referring to shown in Figure 4, be defined in the Ind field of PLOu field, existing GPON international standard keeps not the bit 0 of usefulness (lowest bit position) and distinguishes normal frames data and identification type frame data as identification field by this bit is set.With the lowest bit position of Ind son field in the uplink frame structure PLOu field among the GPON is 0, and the lowest bit position of the Ind son field of PLOu field in the frame structure of uplink frame data waiting for transmission is preset as 1, and these frame data promptly can be used as the identification type frame data so.
Step S102 is provided with the figure place and the compound mode of the bit combination of high rate data transmission.Receiving terminal OLT may receive the uplink frame data of transmitting with different rates in the different optical network systems, and the speed range that receiving terminal OLT can discern is the upper limit, if the speed of transmitting terminal transmission uplink frame data is greater than this upper limit, then can not be received end OLT identification, the speed of transmitting terminal transmission uplink frame data is called two-forty so, otherwise is called low transmission rate.For example, the speed of transmission uplink frame data is 1.25Gbps in the GPON system, and the speed of the transmission uplink frame data in the NG-PON system is 10Gbps, and 10Gbps is called two-forty so, and 1.25Gbps is called low rate.And the OLT of GPON system can not discern the speed that is higher than 1.25Gbps, needs so to become the OLT of GPON system can discern the speed that is higher than 1.25Gbps the velocity simulation of 10Gbps.The figure place of the bit combination of high rate data transmission is provided with according to the ratio of two-forty and low rate, or is provided with according to the figure place that communicating pair is made an appointment.The figure place of the bit combination of high rate data transmission can draw the figure place of needs accurately according to the ratio setting of high-speed transfer speed and low speed transmissions speed, does not cause complicated processing thereby can not produce redundancy.And the definite of compound mode can set the accuracy of power detection according to uplink frame data receiver OLT.For example, the frame data transmission rate is 1.25Gbps in the GPON system, and the uplink frame transmission rate in the NG-PON system is 10Gbps, the figure place of the bit combination of high rate data transmission is determined according to the ratio of high-speed transfer speed and low speed transmissions speed, can utilize 8 10G bit combinations to represent " 1 " and " 0 " in 1 1.25G bit so, represent " 1 " and " 0 " of 1.25G bit respectively as 8 10G bit combinations " 0b11111111 " and " 0b00000000 ", like this can the two can be with the shared identical up wave band achieve frame data synchronization transmission of identical transmission rate.This method can solve the problem of the speed that uplink frame data receiver OLT can not other transmission uplink frame data of compatible identification, thereby can carry out differentiation to frame data according to identification field.For the higher optical line terminal of power detection accuracy, also can so do: adopt to contain " 1 " that high power levels signal " 1 " bit combination more, that have higher integrated power is represented the 1.25G bit, as 8 10G bit combinations " 0b11011010 "; Employing contain high power levels signal " 1 " less, have " 0 " of representing the 1.25G bit than the bit combination of lower integral power, as 8 10G bit combinations " 0b01001010 ".
Step S103 simulates basic bit position " 1 " and " 0 " in the bit combination of lower rate transmissions respectively with the bit combination of described multidigit high rate data transmission that sets figure place and bit combination.When the figure place of the bit combination that sets high-speed transfer speed with after being used for the compound mode of simulation " 1 " and " 0 ", utilize this bit combination to simulate.This simulation can be simulated or only some field be simulated whole frame data according to the operation decision of reality.Such as the uplink frame data receiver OLT of GPON system when handling the uplink frame data that the NG-PON ONU of system sends, only need handle functions such as the activation that just can finish ONU and DBA to the PLOu in the uplink frame structure, PLOAMu, PLSu and DBRu field, and when it detects identification field, just can not handle the load of back, get final product with regard to only needing that PLOu, PLOAMu, PLSu and the DBRu field of this part are carried out velocity simulation so.
Certainly step S102 and step S103 can finish before step S101, and promptly advanced scanning frequency rate simulation is then in the setting of carrying out identification field.
Step S104 sends to transmission network and carries out transfer of data finishing frame data behind the velocity simulation.When in the Ind field of definition PLOu field, when existing GPON international standard keeps that the bit 0 of usefulness (lowest bit position) is not as identification field, when perhaps the identification field of Cha Ruing has less bit, the mistake that the error code that causes causes identification field to occur in the transmission, can adopt repeatedly continuous repeating to transmit the generation of avoiding error code, general employing repeats transmission for 3 times and gets final product, and can certainly determine other the number of transmissions according to the error rate.
Step S105 receives the frame data in the transmission network.No matter uplink frame data receiver OLT conduct has the optical line terminal of PON system now or all may receive the frame data of different system ONU transmission as the optical line terminal of NG-PON system.The optical line terminal of existing PON system and optical network unit are by carrying out data communication by lower speed, and existing optical line terminal carries out the identification of bit by the power of the described frame data signals that receives than the detection frequency detecting of low rate correspondence.Receiving terminal OLT can not discern the speed of different transmission uplink frame data, and receive be the frame data that adopt behind the velocity simulation time, the power of the frame data signals that receives with the detection frequency detecting of the speed correspondence after the described simulation carries out the identification of bit.
Step S106 detects the frame data receive and whether contains identification field, if contain identification field then be identified as the identification type frame data; If do not contain identification field, then these frame data are identified as the plain edition frame data, described plain edition frame data are not for containing the frame data of identification field.For adopting the field in current PON standard definition is identification field, and for example the BSCu field because this field is present in the existing GPON standard agreement, therefore can be discerned when reading this field automatically in the definition according to primary standard; The field of making an appointment for communicating pair because in advance in the definition of ONU and OLT this field, when in the frame data that receive, containing this identification field, can discern equally.And for the situation that adopts the original field of frame data as identification field, the frame type of frame data is distinguished as identification field in the lowest bit position of the Ind field in the definition PLOu field, discerns by the lowest bit position of detecting Ind so.If do not contain identification field, then these frame data are identified as the plain edition frame data, the plain edition frame data do not contain identification field, and the sign of these frame data is does not in other words have identification field.
Step S107 contains identification field if detect in the frame data, so further detect the identification information of this identification field.In the actual use, some identification field contains the identification information that the needs termination is handled the adjacent fields of its back or front, or sign has the affiliated system information of these uplink frame data etc.For example the OLT of GPON system is when handling the ONU of NG-PON system, only need handle functions such as the activation that just can finish ONU and DBA to the PLOu in the uplink frame structure, PLOAMu, PLSu and DBRu field, and when it detects identification field BSCu, this identification field is further discerned, when being identified as the idle frame head, just can not handle the load of back.For the situation of in existing PON frame structure, inserting identification field, when receiving the frame data of process velocity simulation, can also detect the frame data high speed field of identification field sign and the information of low speed field.Certainly, when only need distinguishing, do not need to carry out the further identification of this step when neither needing identification field to carry other identification informations to plain edition frame data and identification type frame data.
Step S108 distributes to the corresponding logic processing device with the frame data that identify frame type and handles, and if there is no described corresponding logic processing device is then distributed to preassigned other logic processing devices and handled or do not handle.
Usually uplink frame data receiver OLT can receive the frame data from different system, and common is that optical network system during upgrading receives the plain edition frame data of existing PON system and the identification type frame data in the NG-PON system.If there is different logic modules among this OLT, so dissimilar frame data are handled by different logic modules, for example, the logic module of being responsible for handling NG-PON system frame number certificate is arranged respectively in a kind of uplink frame data receiver OLT of NG-PON system, also has simultaneously the logic module of handling existing PON frame data, therefore need before processing, discern two kinds of frame data, distribute according to the testing result of step S106 and step S107 so, if testing result is the plain edition frame data, then these frame data is distributed to the logic module of existing PON and handled; If testing result is the identification type frame data, then distributes to the logic module of NG-PON system and handle.
If only have a kind of logic module among the uplink frame data receiver OLT, so according to the testing result of step S106 and step S107, the frame data that will belong to this system are distributed to this logic module and are handled.If there is the logic module of existing PON, then testing result distributed to this logic module for the plain edition frame data and handle; If there is the logic module of NG-PON system, then testing result distributed to this logic module for the identification type frame data and handle.Under the situation of the logic module of having only a kind of existing PON system, if the logic module of the existing PON system among the uplink frame data receiver OLT is responsible for finishing functions such as the activation of ONU and DBA, so all types frame data that receive are all distributed to this logic module and handle, promptly specify all uplink frame data that receive to handle in advance by only a kind of logic module.When handling the frame data that do not belong to existing PON system, logic module can be handled corresponding field according to the identification information of step S107 detection identification field.For example, when it detected identification field BSCu, the identification information of this field just can not handled the load of back when being identified as the idle frame head.When if the logic module of existing PON does not need to be responsible for function such as the activation of all ONU and DBA, can not handle the uplink frame data of NG-PON system.Certainly, can also specify logic module to handle the uplink frame data of the other system that it can be compatible in advance.
See also Fig. 4, Fig. 4 is the optical network system structural representation of embodiment of the invention achieve frame data processing, and as shown in Figure 4, this system comprises: optical network unit 10, optical line terminal 20 and remote node 30.Optical network unit 10, optical line terminal 20 link to each other by remote node 30.Wherein, optical network unit 10 is the transmission ends of uplink frame data, and optical line terminal 20 is the receiving terminal of uplink frame data.Optical network unit 10 is used at frame data waiting for transmission identification field being set, and the frame data that are provided with identification field send to transmission network and carry out transfer of data; Optical line terminal 20 is connected with optical network unit 10 by remote node 30, is used for discerning according to the identification field of frame data the frame type of the frame data that receive from transmission network.Optical network device separately in PON and the NG-PON system may appear in the network of coexistence certainly, but upward principle is identical because the transmission of its frame data is with reception, only wherein a kind of frame data transmitting terminal and receiving terminal is elaborated at this, therefore is encompassed in the system that is equal to variation on this principle.
See also Fig. 5, Fig. 5 is the structural representation of embodiment of the invention optical network unit.Optical network unit 10 shown in Figure 5 specifically comprises: sign is provided with unit 11, velocity simulation unit 12 and transmitting element 13.Sign is provided with unit 11, velocity simulation unit 12 and transmitting element 13 and connects successively.Sign is provided with unit 11, and this unit is used at frame data waiting for transmission identification field being set; Velocity simulation unit 12, this unit are used for that described sign is provided with the frame data that unit 11 is provided with after the identification field and carry out velocity simulation; Transmitting element 13, this unit are used for that identification type frame data behind the velocity simulation are finished in described velocity simulation unit 12 and send to transmission network and carry out transfer of data.
Sign is provided with unit 11, and this unit is used at frame data waiting for transmission identification field being set.This unit can insert identification field in the frame structure of frame data, be example with the uplink frame structure that has GPON now, and its principle of PON system of other types is similar.Sign is provided with unit 11 and inserts the BSCu field as identification field between DBRu field and Payload field.Certainly be identification field except adopting field in current PON standard definition, can also insert the field that communicating pair is made an appointment, and the field that communicating pair is made an appointment needs definition in optical network unit 10 and optical line terminal 20 in advance, and the both sides after the definition all can discern and use the field of making an appointment.In addition, can also be set to identification field in original field of frame data, in the Ind of PLOu field field, existing GPON international standard keeps not the bit 0 of usefulness (lowest bit position) and distinguishes normal frames data and identification type frame data as identification field by this bit is set.With the lowest bit position of Ind son field in the uplink frame structure PLOu field among the GPON is 0, the lowest bit position of the Ind son field of PLOu field in the uplink frame structure waiting for transmission in the optical network unit 10 is preset as 1, and these frame data promptly can be used as the identification type frame data so.
Bit is provided with module 121, and the figure place and the compound mode of the bit combination of high rate data transmission is set.The figure place of the bit combination of high rate data transmission is provided with according to the two-forty that calculates and the ratio of low rate, or at communicating pair fixing figure place is set in advance.
Bit analog module 122 is simulated basic bit position " 1 " and " 0 " in the bit combination of lower rate transmissions respectively with the bit combination of described multidigit high rate data transmission that sets figure place and bit combination.When the figure place of the bit combination that sets high-speed transfer speed with after being used for the compound mode of simulation " 1 " and " 0 ", utilize described bit combination to simulate.This simulation can be simulated or only some field be simulated whole frame data according to the operation decision of reality.Such as the optical line terminal of GPON system when handling the ONU of NG-PON system, only need handle functions such as the activation that just can finish ONU and DBA to the PLOu in the uplink frame structure, PLOAMu, PLSu and DBRu field, and when it detects identification field, just can not handle the load of back, get final product with regard to only needing that PLOu, PLOAMu, PLSu and the DBRu field of this part are carried out velocity simulation so.
Certainly, also can after the advanced scanning frequency rate simulation corresponding identification field be set again, frame data are being carried out under the situation of partial simulation like this, the type that identification field not only can the identification frames data can also be carried the high speed part that passing through simulation and the identification information of the low speed part by simulation in the frame data.
Transmitting element 13, this unit are used for that identification type frame data behind the velocity simulation are finished in described velocity simulation unit 12 and send to transmission network and carry out transfer of data.
See also Fig. 6, Fig. 6 is the structural representation of embodiment of the invention optical line terminal.Optical line terminal 20 shown in Figure 6 specifically comprises: receiving element 21, recognition unit 22 and allocation units 23.Receiving element 21, recognition unit 22 and allocation units 23 are connected successively.Receiving element 21, this unit is used for receiving the frame data of transmission network; Recognition unit 22, this unit is used to discern the frame type of the described frame data that receive; Allocation units 23, this unit are used for that the frame data that identify frame type are distributed to corresponding logic module to be handled, and if there is no the logic module of described correspondence is then distributed to preassigned logic module and handled or do not distribute and handle.
Receiving element 21, this unit is used for receiving the frame data of transmission network.No matter because optical line terminal 20 still all may receive the frame data of different system ONU transmission as the optical line terminal of existing PON system as the optical line terminal of NG-PON system, receiving element 21 is used to receive all types frame data that send to optical line terminal 20.The optical line terminal and the optical network unit of existing PON system are to carry out data communication by lower speed, and existing optical line terminal carries out the identification of bit by the power of the described frame data signals that receives than the detection frequency detecting of low rate correspondence.When optical line terminal 20 can not be discerned different speed, and receive be the frame data that adopt behind the velocity simulation time, the power of the frame data signals that the detection frequency detecting of the speed correspondence of receiving element 21 after with described simulation receives carries out the identification of bit.
Recognition unit 22, this unit is used to discern the frame type of the described frame data that receive, and this unit specifically comprises: the first detection module 221 and second detection module 222.
First detection module 221, this module are used to detect the frame data that described receiving element 21 receives and whether contain identification field.For adopting the field in current PON standard definition is identification field, because this field is present in the existing GPON standard agreement, therefore can be when reading this field, first detection module 221 can be discerned automatically according to the definition of existing GPON standard; For the field that communicating pair is made an appointment, because defined this field in advance in ONU and OLT, when containing this identification field in the frame data that receive, first detection module 221 can be discerned equally.And, when the lowest bit position of the Ind of PLOu field son field is 0, be identified as the plain edition field for the situation of the original field of frame structure that adopts existing PON as identification field; This bit is 1 o'clock, is identified as the identification type field.
Second detection module 222, module are used for further detecting the identification information of the detected identification field of described first detection module.Because some identification field contains the identification information that the needs termination is handled the adjacent fields of its back or front, or sign has the affiliated system information of these uplink frame data etc.For the situation of inserting identification field in existing PON frame structure, when receiving the frame data of process velocity simulation, second detection module 222 can also detect and the frame data high speed field of distinguishing identifier field identification and the information of low speed field.
Allocation units 23, this unit are used for that the frame data that identify frame type are distributed to corresponding logic module to be handled, and if there is no the logic module of described correspondence is then distributed to preassigned logic module and handled or do not distribute and handle.For example, the logic module of being responsible for handling NG-PON system frame number certificate is arranged respectively in a kind of optical line terminal of NG-PON system, also has simultaneously the logic module of handling existing PON frame data, therefore the frame data of different system need be distributed to corresponding logic module handles, recognition result according to recognition unit 22 distributes so, if judged result is the plain edition frame data, then these frame data is distributed to the logic module of existing PON and handled; If judged result is the identification type frame data, then distributes to the logic module of NG-PON system and handle.
If there is a kind of logic module in the optical line terminal 20, so according to the system under this logic module, according to the recognition result of recognition unit 22, the frame data that will belong to this system are distributed to this logic module and are handled.If the other system frame data are assigned to this logic module in advance and handle, need so to handle according to the identification information that second detection module 222 detects identification field, need section processes or the whole processing of some frame data needs etc. as some frame data.
The embodiment of the invention is by being provided with identification field at the ONU end in frame data waiting for transmission, make the OLT of receiving terminal can discern the data type of these frame data according to identification field, current like this PON can effectively finish functions such as the activation of ONU and DBA, and can not produce mistake and handle; NG-PON can select corresponding frame data to handle according to identification field, if can compatible processing the frame data of existing PON, can be distributed to different logical process according to identification field so, thereby the appearance of avoiding mistake to handle can avoid alarming the phenomenon of the system's cisco unity malfunction that causes and professional interruption.
More than cited only be preferred embodiment of the present invention, can not limit the present invention's interest field certainly with this, therefore the equivalent variations of doing according to claim of the present invention still belongs to the scope that the present invention is contained.
Claims (15)
1, a kind of processing method of frame data is characterized in that, comprising:
In the frame structure of frame data to be transmitted identification field is set, described identification field is used for characterizing the frame characteristic of different optical network system frame data;
The described frame data that are provided with identification field are sent to receiving terminal discern processing.
2, the processing method of frame data as claimed in claim 1 is characterized in that, the described identification field that characterizes the frame characteristic that is provided with in the frame structure of frame data to be transmitted is specially:
In the frame structure of frame data, insert identification field, the identification field of described insertion comprises: the field that the field that field of having stipulated in original frame data communication protocol or communicating pair are made an appointment, the field that described communicating pair is made an appointment are meant in the existing frame data communication protocol of not being present in of communicating pair use and communicating pair all can be discerned.
3, the processing method of frame data as claimed in claim 1 is characterized in that, also comprises before receiving terminal is discerned processing the described described frame data that are provided with identification field are sent to:
Frame data are carried out velocity simulation, and described velocity simulation is meant that the transmission rate with these frame data is modeled to the transmission rate that receiving terminal can receive and identify.
4, the processing method of frame data as claimed in claim 3 is characterized in that, describedly in transmission ends the frame data before transmitting is carried out velocity simulation and specifically comprises:
The figure place and the compound mode of the bit combination of high rate data transmission are set;
Simulate basic bit position " 1 " and " 0 " in the bit combination of lower rate transmissions respectively with the bit combination of the described high rate data transmission that sets figure place and compound mode.
5, the processing method of frame data as claimed in claim 4 is characterized in that, the described figure place that the bit combination of high rate data transmission is set is specially:
The figure place of the bit combination of multidigit high rate data transmission is set according to the ratio of described two-forty and described low rate; Or,
According to the make an appointment figure place of bit combination that high rate data transmission is set of communicating pair.
6, the processing method of frame data as claimed in claim 1 is characterized in that, the frame type of the frame data that described receiving terminal identification receives specifically comprises:
Receive the frame data in the transmission network;
Whether the frame data that detection receives contain identification field, if contain identification field then be identified as the identification type frame data; If do not contain identification field, then these frame data are identified as the plain edition frame data.
7, the processing method of frame data as claimed in claim 6 is characterized in that, whether the frame data that described detection receives contain identification field, if contain identification field then also comprise after being identified as the identification type frame data:
Identification field is further detected, obtain the identification information of identification field.
8, frame data processing method as claimed in claim 1 is characterized in that, discerns processing at described receiving terminal and also comprises:
The frame data that identify frame type are distributed to the corresponding logic processing device handle, if there is no described corresponding logic processing device is then distributed to preassigned other logic processing devices and is handled or do not handle.
9, a kind of optical network unit is characterized in that, comprising:
Sign is provided with the unit, and this unit is used at frame data waiting for transmission identification field being set;
Transmitting element, this unit are used for that described sign is provided with frame data that the unit is provided with identification field and send to transmission network and carry out transfer of data.
10, optical network unit as claimed in claim 9 is characterized in that, also comprises:
Velocity simulation unit, this unit are used at described transmitting element frame data being sent to and before transmission network carries out transfer of data frame data are carried out velocity simulation.
11, optical network unit as claimed in claim 9 is characterized in that, described velocity simulation unit comprises:
Bit is provided with module, and this module is used to be provided with the figure place and the compound mode of the bit combination of high rate data transmission;
Bit analog module, this module are used for described bit bit combination basic bit position " 1 " and " 0 " that bit combination that module sets the described high rate data transmission of figure place and compound mode is simulated lower rate transmissions respectively being set.
12, a kind of optical line terminal is characterized in that, comprising:
Receiving element, this unit is used for receiving the frame data of transmission network;
Recognition unit, this unit are used to discern the frame type of the frame data that described receiving element receives.
13, optical line terminal as claimed in claim 12 is characterized in that, described recognition unit comprises:
First detection module, this module are used to detect the frame data that described receiving element receives and whether contain identification field;
Second detection module, this module are used for further detecting the identification information of the detected identification field of described first detection module.
14, optical line terminal as claimed in claim 12 is characterized in that, also comprises:
Allocation units, this unit are used for that the frame data that described recognition unit identifies frame type are distributed to corresponding logic module to be handled, and if there is no the logic module of described correspondence is then distributed to preassigned logic module and handled or do not do and distribute and handle.
15, a kind of optical network system is characterized in that, comprising:
Optical network unit, described optical network unit are used at frame data waiting for transmission identification field being set, and the frame data that are provided with identification field send to transmission network and carry out transfer of data;
Optical line terminal, described optical line terminal is connected with described optical network unit by remote node, is used for discerning according to the identification field of frame data the frame type of the frame data that receive from transmission network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100276092A CN101567726A (en) | 2008-04-22 | 2008-04-22 | Method for processing frame data, optical network unit, optical line terminal and optical network system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100276092A CN101567726A (en) | 2008-04-22 | 2008-04-22 | Method for processing frame data, optical network unit, optical line terminal and optical network system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103023616A (en) * | 2012-12-27 | 2013-04-03 | 北京格林伟迪科技有限公司 | Ethernet frame service identification method and device |
| CN103329462A (en) * | 2011-01-22 | 2013-09-25 | 维尔塞特公司 | Frame formatting for high rate optical communications |
| CN105721383A (en) * | 2016-02-25 | 2016-06-29 | 上海大学 | Identification code-based selective demodulating and energy-saving OFDM-PON method |
-
2008
- 2008-04-22 CN CNA2008100276092A patent/CN101567726A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103329462A (en) * | 2011-01-22 | 2013-09-25 | 维尔塞特公司 | Frame formatting for high rate optical communications |
| CN103329462B (en) * | 2011-01-22 | 2015-03-04 | 维尔塞特公司 | Frame formatting for high rate optical communications |
| CN103023616A (en) * | 2012-12-27 | 2013-04-03 | 北京格林伟迪科技有限公司 | Ethernet frame service identification method and device |
| CN103023616B (en) * | 2012-12-27 | 2015-07-08 | 北京格林伟迪科技有限公司 | Ethernet frame service identification method and device |
| CN105721383A (en) * | 2016-02-25 | 2016-06-29 | 上海大学 | Identification code-based selective demodulating and energy-saving OFDM-PON method |
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