CN101552772B - Method, devices and system for optical network data processing - Google Patents

Method, devices and system for optical network data processing Download PDF

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Publication number
CN101552772B
CN101552772B CN 200810103282 CN200810103282A CN101552772B CN 101552772 B CN101552772 B CN 101552772B CN 200810103282 CN200810103282 CN 200810103282 CN 200810103282 A CN200810103282 A CN 200810103282A CN 101552772 B CN101552772 B CN 101552772B
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frame
onu
new deal
optical network
former protocols
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CN101552772A (en
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高波
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN 200810103282 priority Critical patent/CN101552772B/en
Priority to PCT/CN2009/071147 priority patent/WO2009121308A1/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
    • H04Q11/0062—Network aspects
    • H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/18—Multiprotocol handlers, e.g. single devices capable of handling multiple protocols

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  • Computer Networks & Wireless Communication (AREA)
  • Small-Scale Networks (AREA)

Abstract

The embodiment of the invention relates to a method, devices and a system for optical network data processing. The method comprises the following steps: at least two types of data frames are received;the data frames are recognized; and the data frames of the corresponding types are processed according to the recognition result. One device comprises a first receiving unit, an identifying unit and a first transmitting unit; and the other device comprises a second receiving unit, a recognition unit and a second transmitting unit. The system comprises an optical line terminal device and an optical network unit device. By processing the data frames of the corresponding types according to the recognition result of the received data frames, the optical network unit supporting the original protocol and the extended or updated optical network unit supporting the new protocol can be distinguished and recognized, different processing methods are adopted according to different protocol types of the optical network units, and fianally, the coexistence of the different types of the optical network units is realized.

Description

Optical network data processing method, device and system
Technical field
The embodiment of the invention relates to network communication field, relates in particular to a kind of optical network data processing method, device and system.
Background technology
Along with becoming increasingly abundant of telecommunication service, the user is also increasing to the demand of bandwidth, original twisted-pair feeder and coaxial cable access technology can take full advantage of existing copper cash resource, but can't provide enough bandwidth for new business such as video request program, bidirectional visual meeting, and transmission range is limited, network coverage is little, and the huge capacity of optical fiber and long Distance Transmission have determined that the optical fiber access is the final scheme of broadband access, therefore domestic and overseas operators will Fiber to the home, and (fiber to the home is FTTH) as the inevitable choice of Access Network.
Be illustrated in figure 1 as (the passive optical network of EPON in the prior art, abbreviation: be PON) networking schematic diagram, wherein, OLT is optical line terminal (optical line terminal, be called for short: be OLT) namely be positioned at the local side apparatus of operator's machine room, ONU is the user terminal that optical network unit (optical networkunit is called for short: be ONU) namely is positioned at user's house interior.Down direction from OLT to ONU is broadcasted, and namely an OLT is simultaneously with a plurality of ONU communications.Gigabit Passive Optical Network (Gigabit PON, be called for short: GPON) owing to have wideer bandwidth efficiency, and its synchro timer mechanism is continued to use traditional SDH (Synchronous Digital Hierarchy), adopt kilomega passive optical network packaging method (GPON EncapsulationMethod, be called for short: business that GEM) can adaptive two kinds of speed, thereby become carriers in the world and use maximum systems at present.
There is defective in present GPON system, at first, because the maximum branch that the GPON system supports is than limited, make and increase in number of users, need to revise existing EPON Transmission Convergence (Gigabit PON Transmission Convergence under the continuous condition of enlarged of network size, be called for short: GTC) Ceng agreement, the address field of expansion related protocol frame.Dilatation or upgrading are carried out in basis in original GPON system, make conventional ONU support former protocols having and the newly-increased ONU of dilatation or upgrading supports the New Deal after the address extension, thereby have caused the problem that can't coexist between the ONU under two kinds of agreements; Secondly; existing GPON transmission rate is limited; equally in order to protect existing investment; the part of O NU that has the GPON system now can only be upgraded to the ONU that supports New Deal; perhaps directly using tells ONU to come dilatation or upgrading; and original ONU there are differences in physical layer characteristic with the ONU that supports New Deal, the ONU that therefore causes OLT to identify supporting former protocols having and support address extension after the problem of ONU of New Deal.
Summary of the invention
The purpose of the embodiment of the invention is to overcome the defective that OLT in the above-mentioned prior art can't identify two types ONU, provide a kind of OLT that can make to the ONU that supports former protocols having and optical network data processing method, device and system that the ONU that supports New Deal identifies, realize the ONU coexistence of at least two kinds of different agreement types.
For achieving the above object, the embodiment of the invention provides a kind of optical network data processing method, comprising:
Receive at least two types Frame;
Described Frame is identified;
According to described recognition result, the Frame of respective type is handled.
The embodiment of the invention provides a kind of optical network data processing unit, comprising:
First receiving element is used for receiving at least two types Frame;
Identify unit is used for described at least two types Frame is carried out different identification;
First transmitting element, the described Frame that is used for identifying sends to other device and identifies.
The embodiment of the invention also provides another kind of optical network data processing unit, comprising:
Second receiving element is used for receiving at least two types Frame, and described Frame has different identification;
Recognition unit is used for according to the sign that described data have described at least two types Frame being identified;
Second transmitting element is used for the described recognition data frame that carries out is sent to other devices and handles.
The embodiment of the invention provides a kind of optical network data treatment system, comprising:
The optical line terminal device is used for the sign downlink data frame and also sends or the uplink data frames that receives is identified;
Optical network unit apparatus is used for identifying and sending according to a sign downlink data frame that identification receives or to uplink data frames.
Therefore, the embodiment of the invention by the recognition result of the Frame that receives is handled optical network unit and the dilatation that just can support former protocols having to the Frame of respective type or upgrade after the optical network unit of support New Deal distinguish and identify, just can adopt different processing modes according to different optical network unit protocol types by identification, finally realize the coexistence of two kinds of optical network units.
Description of drawings
Fig. 1 is the networking structure figure of EPON in the prior art;
Fig. 2 is the flow chart of optical network data processing method first embodiment of the present invention;
Fig. 3 is the flow chart of optical network data processing method second embodiment of the present invention;
Fig. 4 is the frame structure schematic diagram of the uplink data frames under the New Deal among optical network data processing method second embodiment of the present invention;
Fig. 5 is the flow chart of optical network data processing method the 3rd embodiment of the present invention;
Fig. 6 is the frame structure schematic diagram of the downlink data frame under the New Deal among optical network data processing method the 3rd embodiment of the present invention;
Fig. 7 is the flow chart of optical network data processing method the 4th embodiment of the present invention;
Fig. 8 is the structural representation of optical network data processing unit first embodiment of the present invention;
Fig. 9 is the structural representation of optical network data processing unit second embodiment of the present invention;
Figure 10 is the structural representation of optical network data treatment system of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Be illustrated in figure 2 as the flow chart of optical network data processing method first embodiment of the present invention, may further comprise the steps:
Step 1: receive at least two types Frame;
Step 2: the Frame that receives is identified;
Step 3: according to recognition result, the Frame of respective type is handled.
Particularly, OLT receives and to come from the Frame that the ONU that supports the different agreement type uploads, then to accept to Frame identify respectively, determine that by identifying the current Frame that obtains comes from the ONU that supports former protocols having or comes from the ONU that supports New Deal, after the type of ONU is judged, just adopt the processing mode corresponding with this kind ONU type that the Frame that receives is handled.
Be illustrated in figure 3 as the flow chart of optical network data processing method second embodiment of the present invention, based on the step of first embodiment, present embodiment furthermore, step 2 specifically comprises:
Step 12: resolve the Frame that receives and obtain the sign position;
Step 13: judge according to this sign position, if first Frame execution in step 14 then, otherwise execution in step 15;
Step 3 specifically comprises:
Step 14: receive first Frame at first passage, and execution in step 16;
Step 15: receive second Frame at second channel, and execution in step 17;
Step 16: to first Frame demultiplexing and the decapsulation;
Step 17: to second Frame demultiplexing and the decapsulation.
Before step 12, also comprise step 10: the first transmission Frame and second is sent Frame encapsulate respectively with multiplexing;
Also comprise step 11 between step 10 and step 12: the reservation bit of the physical layer overhead in first Frame is set to the sign position.
Particularly, first Frame can be for supporting the optical network unit Frame of New Deal, and second Frame is for supporting the optical network unit Frame of former protocols having.
In order to protect existing investment; can not replace original GPON equipment fully; but carry out dilatation or upgrading on the basis of original GPON system; conventional ONU is supported former protocols having; dilatation or the newly-increased ONU of upgrading will support the New Deal after the address extension; so have the ONU that supports former protocols having and the ONU that supports New Deal in the network, and the Frame that OLT will send the ONU of these two kinds of protocol types is identified.
For uplink frame, send to the mode of unicast of OLT for the ONU that supports former protocols having and the ONU that supports New Deal, Frame for the ONU transmission of supporting former protocols having, at first adopt the encapsulation format of original ONU to encapsulate, generate EPON encapsulation (G-PON EncapsulationMethod, hereinafter to be referred as: GEM) frame, and then this EPON encapsulated frame is multiplexed into EPON Transmission Convergence (Gigabit PON Transmission Convergence, hereinafter to be referred as: GTC) in the frame, if Physical Layer OAM (Physical Layer OAM is also arranged simultaneously, hereinafter to be referred as: the PLOAM) words uploaded of message, also this PLOAM message reuse is gone to the GTC frame, the final uplink data frames that generates the ONU that supports former protocols having, Frame for the ONU transmission of supporting New Deal, adopt the encapsulation format of the ONU that supports New Deal to encapsulate, generate the EPON encapsulated frame under the New Deal, and then the EPON encapsulated frame under this New Deal is multiplexed in the EPON Transmission Convergence frame under the New Deal, if also have the Physical Layer OAM message under the New Deal to upload simultaneously, also with the GTC frame of the PLOAM message reuse under this New Deal under the New Deal, the reservation bit of the physical layer overhead of the GTC frame under the New Deal is set to sign position A, the final uplink data frames that generates the ONU that supports New Deal then.Be illustrated in figure 4 as the frame structure schematic diagram of supporting the uplink data frames of New Deal among optical network data processing method second embodiment of the present invention, this frame structure comprises: PLOu is the upstream physical layer expense, Payload is payload, wherein PLOu comprises that Preamble is lead code, Delimiter is delimiter, BIP is for interleaving parity check bit, NG-ONU-ID is the port numbers of the ONU of support New Deal, Ind is the indication information territory, bit0-bit4 in this Ind territory keeps the not bit of usefulness, therefore can with this not the bit of usefulness as the sign position.Because it also can be multidigit that reservation bit can be one, therefore this sign A also can be set to one or multidigit, and this sign position can set up on their own.
Two kinds of receive paths are set respectively in OLT, these two kinds of receive paths are corresponding respectively to be sent and the uplink data frames come from the ONU that supports former protocols having and the ONU that supports New Deal, when receiving the uplink data frames of coming from the ONU that supports former protocols having and the ONU transmission of supporting New Deal, at first this uplink data frames is resolved, from the reservation bit of the physical layer overhead of this uplink data frames, just obtain the sign position information in this EPON Transmission Convergence frame among the above-mentioned bit0-bit4, if should be default A sign in the sign position, derive from the ONU that supports New Deal for current uplink data frames with regard to judgement, just this Frame is forwarded to the first passage corresponding with the ONU that supports New Deal then, adopt the up GTC frame format under the New Deal corresponding with the ONU of this support New Deal that this uplink data frames is carried out demultiplexing reconciliation encapsulation process in this first passage, final OLT has just obtained the PLOAM message under the New Deal (uploading if the PLOAM message under the New Deal is arranged) and has supported the Frame of the ONU initialization of New Deal.
If the sign position information that gets access to is not the words of the A that presets, so just judgement derives from the ONU that supports former protocols having for this uplink data frames, just this uplink data frames is forwarded to the second channel corresponding with the ONU that supports former protocols having then, in this passage, adopt with this and support that the up GTC frame format under the corresponding former protocols having of the ONU of former protocols having is that up GTC frame under the former protocols having carries out demultiplexing and decapsulation, the Frame that final OLT has obtained the PLOAM message (uploading if the PLOAM message under the former protocols having is arranged) under the former protocols having and supported the ONU transmission of former protocols having to this uplink data frames.
In the reservation bit of the physical layer overhead of the uplink data frames by supporting New Deal the sign position is set, just can will support the ONU of former protocols having and the ONU of the support New Deal after dilatation or the upgrading to distinguish, by uplink data frames is resolved to obtain the sign position in different passages, the ONU of the support New Deal after just can making OLT to the ONU that supports former protocols having and dilatation or upgrading identifies, thereby can adopt different processing modes according to the protocol type of different ONU, the ONU that obtains the support New Deal after the ONU that supports former protocols having and dilatation or the upgrading respectively sends and Frame and the control message come, has realized the coexistence of the ONU of two kinds of protocol types.
Be illustrated in figure 5 as the flow chart of optical network data processing method the 3rd embodiment of the present invention, present embodiment also is based on embodiment one, can also comprise after step 3:
Step 21: the reservation bit of the physical layer overhead of first Frame is set to the first sign position; The reservation bit of the physical layer overhead of second Frame is set to the second sign position.
Step 22: obtain reception Frame the sign position and judge whether this sign position is first sign, if first identify then execution in step 23, if not first identifies then execution in step 24;
Step 23: receive this first Frame;
Step 24: second Frame is abandoned;
Particularly, first Frame can be for supporting the optical network unit Frame of New Deal, and second Frame is for supporting the optical network unit Frame of former protocols having.
Send to the ONU that supports former protocols having and support that the Frame of the ONU of New Deal is downlink frame from OLT, this mode is broadcast mode.When the optical network unit Frame (be Frame that OLT send to the ONU that support New Deal) of first Frame for supporting New Deal, when second Frame is the optical network unit Frame (being the Frame that OLT sends to the ONU that supports former protocols having) of supporting former protocols having, descending GEM frame format under the employing New Deal is handed down to the ONU that supports New Deal to OLT the first transmission Frame encapsulates a GEM frame that generates the support New Deal, then the GEM frame under the New Deal is multiplexed in the GTC frame under the New Deal, if when having PLOAM message under the New Deal to issue the PLOAM message under this New Deal also is multiplexed in the GTC frame under the New Deal, generate the first downstream data frame under the New Deal, use the reservation bit of physical layer overhead as the sign position B of the first downstream data frame under this New Deal in the downlink data frame under this New Deal, be illustrated in figure 6 as the frame structure schematic diagram of the first downstream data frame under the New Deal among optical network data processing method the 3rd embodiment of the present invention, comprise down physical layer controll block PCBd, payload Payload, wherein PCBd comprises physical layer synchronization Psync and indication superframe Ident etc., in Ident, comprise error correcting code FEC Ind, multi-frame counter and reservation bit, sign position B just can be arranged in this reservation bit in the downlink data frame under the New Deal; Second of the ONU that adopts GEM frame format under the former protocols having that OLT is handed down to support former protocols having sends Frame and encapsulates the GEM frame that obtains under the former protocols having, this GEM frame is multiplexed in the descending GTC frame under the former protocols having, if when having PLOAM message under the former protocols having to issue this PLOAM message also is multiplexed in the GTC frame under the former protocols having, generate the second downstream data frame, use the reservation bit of physical layer overhead as the sign position A of this downlink data frame in this second downstream data frame, the method to set up of the GTC frame under its concrete method to set up and the New Deal is identical.
When receiving downlink data frame under the former protocols having and the downlink data frame under the New Deal simultaneously, ONU can resolve it simultaneously, for the downlink data frame under the former protocols having, support the ONU of former protocols having to resolve the downlink data frame under this former protocols having according to correct parsing form, and for the downlink data frame under the New Deal, because what adopt is wrong parsing, therefore can cause significant field to resolve failure, by judge analysis result whether correctly just can determine this downlink data frame be OLT send to support former protocols having ONU's or OLT sends to the ONU of support New Deal, in case determining this downlink data frame is that OLT sends to the ONU's that supports former protocols having, then support the ONU of former protocols having just to receive this downlink data frame, and it is carried out a series of processing that comprise the demultiplexing decapsulation, therefore support the ONU of former protocols having also the downlink data frame under the New Deal can be abandoned simultaneously, support the ONU of former protocols having only to keep OLT and send to own that part of Frame and control message; When receiving downlink data frame under the former protocols having and the downlink data frame under the New Deal simultaneously, the ONU that supports New Deal at first its sign is resolved, when being resolved to the sign position for A, support the ONU of New Deal just can judge this Frame be OLT issue support former protocols having ONU's and it is not further resolved but directly filters and abandon, and when the sign position that is resolved to is B, then supporting the ONU of New Deal just can judge this Frame is that OLT issues oneself, thereby continue this Frame is resolved, this resolving just comprises and above-mentioned encapsulation and multiplexing relative demultiplexing and decapsulation process, finally obtains Frame and control message that OLT sends to the ONU that supports New Deal.
Directly the frame structure utilization of the two kinds of protocol types parsing form corresponding with the ONU that supports former protocols having resolved the back by the ONU that supports former protocols having and judge whether analysis result is correct, just can make the ONU that supports former protocols having can identify OLT sends to oneself Frame and abandons downlink data frame under the New Deal of ONU that OLT sends to the support New Deal, by the setting identification position just can be so that support the ONU of New Deal that the downlink data frame of these two kinds of protocol types is distinguished respectively in the downlink data frame under former protocols having and the downlink data frame under the New Deal, directly abandon the downlink data frame that carries the ONU sign position of supporting former protocols having, thereby the ONU that make to support former protocols having can identify OLT separately with the ONU that supports New Deal and issue own Frame and control message, has guaranteed the coexistence of the ONU of two kinds of protocol types in the network and can not send message collision.And can also make the not one's own downlink data frame of ONU automatic fitration of supporting New Deal by this sign position, thereby improved Message Processing efficient.
Be illustrated in figure 7 as the flow chart of optical network data processing method the 4th embodiment of the present invention, based on embodiment one, may further comprise the steps, wherein the step 2 among the embodiment one can be specially:
Step 30: adopt first to resolve format analysis to first Frame and second Frame that receives at first passage, in second channel, adopt second to resolve format analysis to first Frame and second Frame simultaneously;
Step 31: the Frame after resolving is carried out verification;
Step 3 can be specially:
Step 32: judge whether verification is successful, if successful then execution in step 33, otherwise execution in step 34;
Step 33: receive this Frame;
Step 34: this Frame is abandoned.
Particularly, the process that the Frame after resolving is carried out verification is: through the first first Frame verification succeeds of resolving behind the format analysis; Through the first Frame verification failure behind the second parsing format analysis; Through the second Frame verification succeeds behind the second parsing format analysis; Through the second Frame verification failure behind the first parsing format analysis.
Sometimes uncertain at the value of the filling in the reservation bit of the ONU that supports former protocols having, thus the sign position no longer is set in the present embodiment, but verification identifies by the uplink data frames that receives is resolved.
Particularly, if the optical network unit Frame (be first uplink data frames that the ONU that support New Deal send to OLT) of first Frame for supporting New Deal, the optical network unit Frame (be second uplink data frames that the ONU that support former protocols having send to OLT) of second Frame for supporting former protocols having.Concrete resolving is: two receive paths are set, first Frame and the employing of second Frame are received at first receive path, in this receive path, adopt up GTC frame format under the former protocols having corresponding with the ONU of the former protocols having of support that second Frame is carried out decapsulation and obtain up GEM frame under the correct former protocols having, if when having PLOAM message under the former protocols having to upload then also can obtain this PLOAM message by demultiplexing, and adopt the up GTC frame format under the former protocols having corresponding with the ONU that supports former protocols having that first Frame is carried out demultiplexing, obtain the GEM frame under the wrong New Deal, if when having PLOAM message under the New Deal to upload then also can demultiplexing obtain the PLOAM message under the wrong New Deal, first uplink data frames and the employing of second uplink data frames are received at second receive path, adopt up GTC frame format under the New Deal corresponding with the ONU of support New Deal that first Frame is carried out demultiplexing and obtain up GEM frame under the correct New Deal, if also can demultiplexing when having PLOAM message under the New Deal to upload obtain the PLOAM message under the correct New Deal, adopt up GTC frame format under the New Deal corresponding with the ONU that supports New Deal that second Frame is carried out decapsulation and obtain up GEM frame under the wrong former protocols having, if when having PLOAM message under the former protocols having to upload then also can demultiplexing obtain PLOAM message under the former protocols having of mistake.Respectively the up GEM frame under the up GEM frame under the PLOAM message under the former protocols having behind two receive path demultiplexings (uploading if the PLOAM message under the former protocols having is arranged) and the former protocols having and the PLOAM message under the New Deal (uploading if the PLOAM message under the New Deal is arranged) and the New Deal is carried out verification.For first receive path, because the GEM frame under the New Deal that the PLOAM message under the New Deal that demultiplexing obtains and decapsulation obtain is wrong message and Frame, therefore can be dropped because of check errors, and the ONU that keep to support former protocols having sends and PLOAM message and GEM frame under the former protocols having that comes, for second receive path, because the GEM frame under the former protocols having that the PLOAM message under the former protocols having that demultiplexing obtains and decapsulation obtain is wrong message and Frame, therefore can be because check errors be dropped, and keep the ONU that supports New Deal to send and PLOAM message under the New Deal come and the up GEM frame under the New Deal.
By adopting two receive paths to coming from the ONU that supports former protocols having and supporting the uplink data frames of the ONU of New Deal to resolve verification, just can abandon the Frame not corresponding with receive path, thereby make and can not receive the PLOAM message of different agreement type and the situation of GEM frame simultaneously at two receive paths, thereby guaranteed by having only the PLOAM message of a type and GEM frame to be forwarded to the upper strata behind the receive path, and then guaranteed that different ONU can coexist in the network.
Be illustrated in figure 8 as the structural representation of optical network data processing unit first embodiment of the present invention, comprise:
First receiving element 100 is used for receiving at least two types Frame;
Identify unit 101 is used for described at least two types Frame is carried out different identification;
First transmitting element 102, the described Frame that is used for identifying sends to other device and identifies.
Further, identify unit 101 can comprise:
First identification module 1010, the reservation bit that is used for the physical layer overhead of first Frame is set to the sign position;
Particularly, the uplink data frames that first Frame sends for the ONU that supports New Deal, the uplink data frames that second Frame sends for the ONU that supports former protocols having.At first, first receiving element 100 receives first uplink data frames and second uplink data frames of the ONU transmission that comes from the ONU that supports former protocols having and support New Deal, then, the reservation bit bit0-bit4 of the physical layer overhead of second uplink data frames under first identification module, 1010 New Deals is set to identify position A, and last first transmitting element 102 just can will pass through second Frame of sign and not send through first Frame that identifies.
By identify unit the Frame reservation bit is identified as the sign position, just the uplink data frames that can send the ONU of the support New Deal after the ONU that supports former protocols having and dilatation or the upgrading is distinguished, thereby judging what send Frame when can make follow-up identification is the ONU that supports the ONU of former protocols having or support New Deal, has finally realized the coexistence of the ONU of two kinds of protocol types.
Identify unit 101 can comprise:
Second identification module 1011, the reservation bit that is used for the physical layer overhead of first Frame is set to the first sign position, and the reservation bit of the physical layer overhead in second Frame is set to the second sign position.
Particularly, first Frame is the downlink data frame that OLT is handed down to the ONU that supports New Deal, and second Frame is the downlink data frame that OLT sends to the ONU transmission of supporting former protocols having.
First receiving element 100 receives OLT and sends to first downstream data frame and the second downstream data frame that the ONU that supports former protocols having and the ONU that supports New Deal send, the reservation bit bit0-bit4 of the physical layer overhead of the downlink data frame under second identification module, 1011 New Deals is set to sign position B then, generate the first downstream data frame, the reservation bit bit0-bit4 of the physical layer overhead of the downlink data frame under the former agreement is set to sign position A, generates the second downstream data frame.At last, first transmitting element 102 just can send first downstream data frame and the second downstream data frame after the sign.
All identify by the Frame of identify unit to two types, just can distinguish the downlink data frame that OLT sends to the ONU of the ONU that supports former protocols having and the support New Deal after dilatation or the upgrading, thereby judge the ONU that sending to of this Frame support former protocols having or the ONU that supports New Deal when can make follow-up identification, finally realized the coexistence of the ONU of two kinds of protocol types.
Be illustrated in figure 9 as the structural representation of optical network data processing unit second embodiment of the present invention, this device comprises:
Second receiving element 200 is used for receiving at least two types Frame, and described Frame has different identification;
Recognition unit 201 is used for according to the sign that described data have described at least two types Frame being identified;
Second transmitting element 202 is used for according to recognition result the Frame of respective type being handled.
Further, this recognition unit 201 comprises:
First identification module 2010 is used for carrying out Classification and Identification according to the sign position of the Frame that receives.
Particularly, what second receiving element 200 received is uplink data frames, and this uplink data frames comprises corresponding to first Frame of the ONU that supports former protocols having with through identifying second Frame corresponding to the ONU that supports New Deal of A sign, 2010 pairs of Frames that receive of first identification module in the recognition unit 201 are identified then, concrete identifying is: resolve and obtain the sign position, if first identification module 2010 is judged this sign position and is default A sign, derive from the ONU that supports New Deal for current uplink data frames with regard to judgement, second transmitting element 202 just is forwarded to this Frame the first passage corresponding with the ONU that supports New Deal then, adopt the upstream data frame format under the New Deal corresponding with the ONU of this support New Deal that this uplink data frames is carried out demultiplexing reconciliation encapsulation process in this first passage, final OLT has just obtained the PLOAM message under the New Deal (uploading if the PLOAM message under the New Deal is arranged) and has supported the Frame of the ONU initialization of New Deal.
If it is not the words of the A that presets that first identification module 2010 is judged the sign position information that gets access to, so just judgement derives from the ONU that supports former protocols having for this uplink data frames, second transmitting element 202 just is forwarded to this uplink data frames the second channel corresponding with the ONU that supports former protocols having then, in this passage, adopt with this and support that the upstream data frame format under the corresponding former protocols having of the ONU of former protocols having is that uplink data frames under the former protocols having is carried out demultiplexing and decapsulation, the Frame that final OLT has obtained the PLOAM message (uploading if the PLOAM message under the former protocols having is arranged) under the former protocols having and supported the ONU transmission of former protocols having to this uplink data frames.
If what second receiving element 200 received is downlink data frame, this downlink data frame comprises corresponding to OLT and sends to the first downstream data frame of the ONU that supports former protocols having and corresponding to the second downstream data frame of the ONU that supports New Deal, and in the reservation bit position of first downlink frame, be provided with the A sign, in the reservation bit position of second downlink frame, be provided with the B sign it is distinguished.Second receiving element 200 can directly send to the Frame that receives the ONU that supports former protocols having, allow and support the ONU of former protocols having voluntarily this Frame to be carried out analysis judgment, if the data frame format that parses is correctly then for the first downstream data frame and receive, if mistake then for the second downstream data frame and abandon; The downlink data frame that receives in 2010 pairs of second receiving elements 200 of first identification module is resolved and is obtained the sign position, when being resolved to the sign position for A, first identification module 2010 just can judge this Frame be OLT issue support former protocols having ONU's and this Frame is not further resolved but directly filters and abandon, and when the sign position that is resolved to is B, then just can to judge this Frame be that OLT issues the ONU that supports New Deal to first identification module 2010, thereby continue this Frame is resolved.
By recognition unit the sign position of the reservation bit in the Frame is identified, the Frame that the ONU of the support New Deal after just can making OLT to the ONU that supports former protocols having and dilatation or upgrading sends is identified, thereby that can judge the transmission Frame is the ONU that supports the ONU of former protocols having or support New Deal, Frame after second sending module will be identified sends in corresponding first receive path or second receive path, these two kinds of receive paths adopt different demultiplexings to conciliate the encapsulation process mode respectively, the ONU that obtains the support New Deal after the ONU that supports former protocols having and dilatation or the upgrading respectively sends and Frame and the control message come, and can make the ONU that supports former protocols having and the ONU that supports New Deal can identify the downlink data frame that OLT sends, finally realized the coexistence of the ONU of two kinds of protocol types.
Recognition unit 201 also can comprise:
Second identification module 2011 is used for according to check information the Frame that receives being identified.
Particularly, what second receiving element 200 received is uplink data frames, and this uplink data frames comprises corresponding to first uplink data frames of the ONU that supports former protocols having with corresponding to second uplink data frames of the ONU that supports New Deal, 2011 pairs of Frames that receive of second identification module in the recognition unit 201 are identified then, concrete identifying is: adopt in first passage corresponding to the first parsing form of the ONU that supports former protocols having first uplink data frames and second uplink data frames are resolved simultaneously, in second channel, adopt corresponding to the second parsing form of the ONU that supports New Deal first uplink data frames and second uplink data frames are resolved simultaneously, for first passage, because PLOAM message (uploading if the PLOAM message under the New Deal is arranged) and the GEM frame under the New Deal of resolving under the New Deal that obtains are wrong message and Frame, therefore after the GEM frame under 202 pairs of New Deals of second transmitting element and the PLOAM message under the New Deal (uploading if the PLOAM message under the New Deal is arranged) are carried out the verification judgement, can abandon this wrong Frame and message, and the PLOAM message (uploading if the PLOAM message under the former protocols having is arranged) under the former protocols having that reservation is come by the ONU transmission of supporting former protocols having and the up GEM frame under the former protocols having, and send to OLT, for second channel, because PLOAM message (uploading if the PLOAM message under the former protocols having is arranged) and the GEM frame under the former protocols having of resolving under the former protocols having that obtains are wrong message and Frame, therefore the GEM frame under 202 pairs of former protocols havings of second transmitting element and the PLOAM message under the former protocols having (uploading if the PLOAM message under the former protocols having is arranged) carry out it to be abandoned after verification is judged, and remain with that the ONU that supports New Deal sends and PLOAM message (uploading if the PLOAM message under the New Deal is arranged) under the New Deal come and the up GEM frame under the New Deal, and send to OLT.
Obtain the result that the Frame of the ONU that comes from the ONU that supports former protocols having and support New Deal is resolved respectively by in two passages, the uplink data frames that receives being resolved simultaneously at recognition unit, in each passage, just can only obtain a kind of correct data frame format, adopt second transmitting element that analysis result is carried out checking treatment and transmission then, just can abandon the Frame not corresponding with receive path, thereby make and can not receive different up GEM frames simultaneously at two receive paths, if PLOAM message is arranged to be uploaded, can not receive different PLOAM message simultaneously at two receive paths yet, thereby guaranteed by having only PLOAM message (uploading if the PLOAM message under the former protocols having is arranged) and the up GEM frame under the former protocols having under the former protocols having behind the receive path or have only PLOAM message (uploading if the PLOAM message under the New Deal is arranged) under the New Deal and the up GEM frame under the New Deal has been forwarded to the upper strata, and then guaranteed that the ONU of different agreement type can coexist in the network.
As shown in figure 10, be the structural representation of optical network data treatment system of the present invention, this system comprises:
Optical line terminal device 300 is used for the sign downlink data frame and also sends or the uplink data frames that receives is identified;
Optical network unit apparatus 301 is used for identifying and sending according to a sign downlink data frame that identification receives or to uplink data frames.
Further, optical line terminal device 300 comprises:
The first optical line terminal unit 3000 is used for sign downlink data frame and transmission;
The second optical line terminal unit 3001 is used for the uplink data frames that receives is identified.
Optical network unit apparatus 301 comprises:
First optical network unit 3010 is used for the downlink data frame that receives according to the identification of sign position;
Second optical network unit 3011 is used for uplink data frames is identified and sends.
Particularly, 3000 couples of OLT in the first optical line terminal unit in the optical line terminal device 300 send to the ONU that supports former protocols having and support the downlink data frame of the ONU of New Deal to identify, send to optical network unit apparatus 301 then, first optical network unit 3010 in the optical network unit apparatus 301 is identified and can be handled accordingly downlink data frame according to the sign in the downlink data frame that receives.Second optical network unit 3011 in the optical network unit apparatus 301 identifies the ONU that supports former protocols having and the uplink data frames that the ONU that supports New Deal sends to OLT respectively, send to optical line terminal device 300 then, the second optical line terminal unit 3001 in the optical line terminal device 300 just can be distinguished and identify and handle accordingly uplink data frames after receiving this uplink data frames according to the sign position, concrete identification and processing procedure repeat no more as described in the aforementioned embodiment.
Respectively uplink data frames and downlink data frame are identified and identify by optical line terminal device and optical network unit apparatus, just can distinguish OLT sends to the downlink data frame of the ONU that supports former protocols having and the ONU that supports New Deal and supports the ONU of former protocols having and support the ONU of New Deal to send to the uplink data frames of OLT, thereby there is not message collision, can obtain corresponding Frame and message, therefore can realize the coexistence of the ONU of two kinds of different agreement types.
Need to prove, above-described embodiment has only illustrated the situation of the ONU coexistence of two kinds of different agreement types, when having the ONU of more different agreement types in the optical-fiber network, also can use said method to realize, more sign only need be set or more receive path is set and get final product.
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although with reference to preferred embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the spirit and scope of technical solution of the present invention.

Claims (3)

1. an optical network data processing method is characterized in that, comprising:
Receive first Frame of New Deal type and second Frame of original protocol type simultaneously;
Described first Frame of New Deal type and second Frame of original protocol type of receiving simultaneously, be specially: first Frame of the ONU transmission that the OLT reception is supported second Frame that the ONU of former protocols having sends and supported New Deal, the reservation bit of the physical layer overhead in described first Frame is provided with the sign position;
Protocol type to described first Frame and second Frame is identified respectively;
Described protocol type to described first Frame and second Frame is identified respectively, is specially: described OLT identifies described first Frame and described second Frame according to described sign position;
According to recognition result, adopt the corresponding processing mode of protocol type that described first Frame and second Frame are handled;
Described according to recognition result, adopt the corresponding processing mode of protocol type that described first Frame and second Frame are handled, be specially:
Described OLT will comprise the first passage that described first Frame that identifies the position is forwarded to the New Deal correspondence that arranges among the described OLT, adopt New Deal that described first Frame is carried out demultiplexing and decapsulation in described first passage;
Described OLT is forwarded to the second channel of the former protocols having correspondence that arranges among the described OLT with second Frame, adopts former protocols having that described second Frame is carried out demultiplexing and decapsulation in described second channel.
2. an optical network data processing unit is characterized in that, comprising:
Second receiving element is used for receiving simultaneously first Frame of New Deal type and second Frame of original protocol type, and the reservation bit of the physical layer overhead in described first Frame is provided with the sign position;
First identification module is used for according to the sign position of the Frame that receives described first Frame and described second Frame being carried out Classification and Identification;
Second transmitting element is used for comprising the first passage that described first Frame that identifies the position is forwarded to the New Deal correspondence, adopts New Deal that described first Frame is carried out demultiplexing and decapsulation in described first passage; Second Frame is forwarded to the second channel of former protocols having correspondence, in described second channel, adopts former protocols having that described second Frame is carried out demultiplexing and decapsulation.
3. optical network data treatment system is characterized in that comprising:
The optical line terminal device is the described optical network data processing unit of claim 2, is used for the sign downlink data frame and also sends or the uplink data frames that receives is identified;
Optical network unit apparatus is used for identifying and sending according to a sign downlink data frame that identification receives or to uplink data frames.
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