CN101616338A - A kind of method, apparatus and system that data transmit in the multiple spot multi-plexing light accessing system - Google Patents
A kind of method, apparatus and system that data transmit in the multiple spot multi-plexing light accessing system Download PDFInfo
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- CN101616338A CN101616338A CN200810068041A CN200810068041A CN101616338A CN 101616338 A CN101616338 A CN 101616338A CN 200810068041 A CN200810068041 A CN 200810068041A CN 200810068041 A CN200810068041 A CN 200810068041A CN 101616338 A CN101616338 A CN 101616338A
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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
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- H—ELECTRICITY
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- H04L12/00—Data switching networks
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- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2858—Access network architectures
- H04L12/2861—Point-to-multipoint connection from the data network to the subscribers
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- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
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Abstract
The invention provides a kind of method, apparatus and system that data transmit in the multiple spot multi-plexing light accessing system, this method comprises that OLT is according to the ONU registration table, the data and the control information that will have the ONU of same packets number are encapsulated in the GTC frame, and in this GTC frame identification field, fill this packet number, send then; After ONU received the GTC frame that OLT sends, relatively this identification field that receives GTC frame packet number of carrying and the packet number of this ONU self abandoned this GTC frame if both are not inconsistent; If both conform to this GTC frame is handled.By ONU is divided into groups, use GTC frame overhead identification field partly to identify the grouping of ONU, can realize big branching ratio is put the support of multiple spot multi-plexing light accessing system, can realize amplification, thereby reduce single user cost network capacity.
Description
Technical field
The invention belongs to optical communication field, relate in particular to a kind of method, apparatus and system that data transmit in the multiple spot multi-plexing light accessing system.
Background technology
The present broadband scheme of Access Network has multiple, inserts as twisted-pair feeder, coaxial cable, optical fiber.Wherein, huge capacity of optical fiber and long Distance Transmission, having determined optical fiber to insert is the final scheme of broadband access.Telecommunication service becomes increasingly abundant, and the user is also increasing to the demand of bandwidth, and domestic and countries in the world operator will Fiber to the home, and (fiber to the home is FTTH) as the inevitable choice of Access Network.A typical EPON (passive optical network, PON) as shown in Figure 1, comprise optical line terminal (optical lineterminal, OLT), at least one optical network unit (optical network unit, ONU) or Optical Network Terminal (optical network terminal, ONT), and connect the optical splitter splitter of OLT and ONU/ONT or Optical Distribution Network (Optical Distribution Network, ODN).Wherein, data are sent to ONU from OLT and are called descendingly, and down direction transmits with broadcast mode in present PON network, are sent to OLT from ONU and are called uply, and up direction transmits with mode of unicast in present PON network.
Gigabit Passive Optical Network (Gigabit PON, GPON) because it has higher bandwidth efficiency, and its synchro timer mechanism is continued to use traditional SDH (Synchronous Digital Hierarchy) (Synchronous Digital Hierarchy, SDH) adopt kilomega passive optical network packaging method (G-PON encapsulation method, GEM) business of the adaptive different rates of encapsulation.Thereby become carriers in the world and use at present maximum connecting systems.
Based on the network configuration of GPON point to multiple spot, an OLT communicates by letter with a plurality of ONU simultaneously, in order to distinguish different ONU, needs to give each ONU that the sign of a unique ONU-ID as ONU is set.May carry a plurality of dissimilar customer services on each ONU,, when business being carried out the GEM encapsulation, use GEM port-ID to identify in order to distinguish different business.
Because data take place to OLT in a plurality of ONU simultaneously, may cause signal conflict, influence the normal transmission of OLT, so OLT need coordinate the transmission of ONU by the mode of timeslice mandate, guarantee that some time periods only allow ONU to send data, can effectively avoid conflict like this.For guaranteeing that ONU goes up service quality (the quality of service of different business, QoS), a plurality of allocation units need be set, each allocation units correspondence has the Business Stream of same traffic feature, therefore OLT timeslice authorization object is the allocation units on the ONU, uses the Alloc-ID sign.The maximum branch ratio of GPON system support is 1: 64 at present, increase along with number of users, network size constantly enlarges, for guaranteeing operator's interests maximization, (such as 1: 512 or 1: 1O24) the PON system carried out networking to be necessary to use high branching ratio, with increase single-point capacity, thereby reduce metropolitan area network access node minimizing equipment and maintenance cost.
With branching ratio be 1: 512 be example, realize that with reference to present product an ONU supports 5 Alloc-ID at least, therefore 32 GEM port need 512 ONU-ID, 2560 Alloc-ID, 16384 GEM port-ID can be for distributing at least.And existing Gigabit Passive Optical Network Transmission Convergence (GigabitPon Transmission Convergence, GTC) agreement is at most only supported 254 ONU, 3842 GEMport, obvious ONU that supports and GEM port number can not meet the demands.
Summary of the invention
In view of this, the embodiment of the invention provides a kind of high branching ratio of supporting, promptly supports method, system and the corresponding OLT of the point of more ONU to the transmission of multiple spot multi-plexing light accessing system data, ONU equipment.
For achieving the above object: the embodiment of the invention provides a kind of method that data transmit in the multiple spot passive light connecting system, system and corresponding OLT, and ONU equipment wherein, is put the method that data transmit in the multiple spot passive light connecting system and comprised:
OLT is according to the ONU registration table, and the data and the control information that will have the ONU of same packets number are encapsulated in the GTC frame, and fill this packet number in this GTC frame identification field, send then;
After ONU received the GTC frame that OLT sends, relatively this identification field that receives GTC frame packet number of carrying and the packet number of this ONU self abandoned this GTC frame if both are not inconsistent; If both conform to this GTC frame is handled.
The embodiment of the invention also provides a kind of method that data transmit in the multiple spot multi-plexing light accessing system, comprising:
ONU is filled into the packet number of self in the identification field of up GTC frame, and sends;
OLT according to the packet number that this identification field that receives the GTC frame is carried, determines corresponding target processing module after receiving the GTC frame that ONU sends, and the target processing module that is forwarded to described correspondence is handled.
The embodiment of the invention also provides a kind of optical line terminal, comprises, and at least two PLOAM modules, at least two GEM TC adaptor modules, at least two DBA control modules become frame module with GTC;
Wherein, described GTC one-tenth frame module is used to receive the information from each PLOAM module, DBA control module and GEM TC adaptor module, according to the ONU registration table, the data and the control information that will have the ONU of same packets number are encapsulated in the GTC frame, in this GTC frame identification field, fill this packet number, send then; When receiving the GTC frame, according to the identification field of this GTC frame that receives, determine the target processing module of corresponding grouping, the GTC frame to be resolved, the information after will resolving then is transmitted to the target processing module of corresponding grouping and handles;
Described PLOAM module is used to handle the PLOAM message of the correspondence grouping of described GTC framing module forwards; The correspondence grouping PLOAM message that need are sent sends to described GTC one-tenth frame module;
Described DBA control module is used to handle the DBA message of corresponding grouping after the parsing of described GTC framing module forwards; The correspondence grouping DBA control messages that need are sent sends to described GTC one-tenth frame module;
Described GEM TC adaptor module is used to handle the GEM piece of corresponding grouping after the parsing of described GTC framing module forwards; The correspondence grouping GEM piece message that need are sent sends to described GTC one-tenth frame module.
The embodiment of the invention also provides a kind of optical network unit or Optical Network Terminal, comprises PLOAM module, DBA control module and GEM TC adaptor module, comprises that also GTC filtering frames device becomes frame module with GTC;
Wherein, GTC filtering frames device is used for when receiving the GTC frame, and the packet number that identification field is carried in the more described GTC frame that receives and the packet number of this network unit/optical network terminal itself if both do not conform to, then abandon this GTC frame; If both conform to, then the described GTC frame that receives is transmitted to described GTC and becomes frame module;
GTC becomes frame module to be used to receive the GTC frame that GTC filtering frames device is transmitted, and this GTC frame is resolved, and the information after will resolving is transmitted to PLOAM module, DBA control module and GEM TC adaptor module; When optical network unit or Optical Network Terminal send the GTC frame, the packet number of this network unit/optical network terminal self is filled in the identification field of up GTC frame, and sends.
The embodiment of the invention also provides a kind of point to the multiple spot multi-plexing light accessing system, comprises optical line terminal, Optical Network Terminal/optical network unit, optical distribution network, ONU grouped element, ONU registry hive and memory cell;
Wherein, the ONU grouped element, being used for when ONU registers is ONU allocation packets number;
Optical line terminal is used for packet number is sent to corresponding ONU; According to the ONU registry hive, the PLOAM message that belongs to same grouping, GEM piece and BW mandate that needs are issued are multiplexed in the same descending GTC frame, fill packet number in identification field, then this GTC frame are sent; Behind the up GTC frame that receives the ONU transmission, according to the identification field of this up GTC frame, determine the target processing module of corresponding grouping, handle by the target processing module of this correspondence grouping;
Optical Network Terminal/optical network unit is used for when receiving the GTC frame, and relatively the packet number of carrying of the identification field in this GTC frame that receives and the packet number of this Optical Network Terminal/optical network unit self if both are not inconsistent, then abandon this GTC frame; If both conform to, then this GTC frame that receives is handled; When sending up GTC frame, the packet number of this Optical Network Terminal/optical network unit self is filled in the identification field of up GTC frame, and sends;
The ONU registry hive is used for the sequence number and the corresponding packet number of the recording light network terminal/optical network unit at least; The inquiry of packet number is provided for optical line terminal;
Memory cell is used to preserve the packet number that described OLT issues, for Optical Network Terminal/optical network unit provides the packet number inquiry.
The embodiment of the invention uses the identification field of GTC frame overhead part to identify grouping to ONU, can be implemented in to need not to revise in a large number under the situation that existing protocol and agreement realize, supports big branching ratio PON system, increases network capacity, thereby reduces single user cost; The point that the scheme that adopts the embodiment of the invention to provide can be supported bigger branching ratio is flexibly supported seamless dilatation to the multiple spot multi-plexing light accessing system.
Description of drawings
Fig. 1 is a prior art PON system reference model schematic diagram;
Fig. 2 handles the schematic diagram of descending GTC frame for embodiment of the invention optical line terminal OLT;
Fig. 3 handles the schematic diagram of descending GTC frame for embodiment of the invention optical network unit ONU;
Fig. 4 handles the schematic diagram of up GTC frame for embodiment of the invention optical line terminal OLT;
Fig. 5 is the structural representation of embodiment of the invention optical line terminal OLT;
Fig. 6 is the structural representation of embodiment of the invention optical network unit ONU;
Fig. 7 puts the schematic diagram of multiple spot multi-plexing light accessing system for the embodiment of the invention;
Fig. 8 uses reservation position in the GTC frame for the embodiment of the invention and comes the schematic diagram of identification packet number;
Fig. 9 uses the reservation position of up GTC frame for the embodiment of the invention and comes the schematic diagram of identification packet number;
The encapsulation schematic diagram that Figure 10 sends for embodiment of the invention grouping.
Embodiment
The embodiment of the invention provides a kind of method of supporting the point of big branching ratio to the transmission of multiple spot multi-plexing light accessing system data, system and OLT, ONU equipment.These method, apparatus and system are applicable to existing GPON, and use in the point to multipoint communication system that G.984.3 defined mechanism communicates.
Embodiment one: present embodiment provides a kind of and supports big branching ratio to put the method that multiple spot multi-plexing light accessing system data transmit:
All ONU belong to the grouping of acquiescence under initial condition, its packet number is Group0 (such as 0 or complete 1), and only receiving the GTC-ID value is the descending GTC frame of Group0, and fill Group0 among the GTC-ID in the up GTC frame that sends.
Being grouped in of ONU carried out when it is registered, and this grouping can be carried out by OLT, also can be carried out by webmaster or upper strata processing module.Concrete, in registration process (when re-powering during initialization or after OLT and/or the ONU power down), after OLT receives the sequence number response of ONU, distribution principle according to predetermined distribution principle or outside input, can manually or automatically carry out the distribution of packet number to ONU, the distribution of packet number can be carried out flexibly, as in order to ONU grouping or with random sequence to the ONU grouping etc., but the ONU-ID that belongs to same grouping ONU, Alloc-ID, GEM port-ID field must be unique, then can be identical between different grouping, for example belong to grouping 1 ONU,, ONU-ID then in grouping 1, cannot occur and be other ONU of 1 if its ONU-ID is 1; Alloc-ID, GEM port-ID field are also together.Prior art is adopted in the distribution of ONU-ID, Alloc-ID, GEM port-ID.Limited by existing protocol, the ONU number of each grouping can not be above 254.OLT sends to this corresponding ONU with the packet number of distributing.The mode of issuing of packet number has following several:
1, is filled among the reservation byte of Assign_ONU-ID PLOAM message and is handed down to ONU, as shown in Table 1, promptly use the 12nd byte of reserving that packet number is sent to ONU.
| Byte number | Content | Describe |
| ??1 | ??11111111 | Broadcast to all ONU transmissions |
| ??2 | ??00000011 | Message identifier |
| ??3 | ??pppppppp | ??ONU-ID |
| ??4 | ??abcdefgh | The 1st byte of sequence number |
| ??5-10 | ??..... | |
| ??11 | ??stuvwxyz | The 8th byte of sequence number |
| ??12 | Do not stipulate | Reserve |
Table one
2, insert among the reservation byte of Ranging_Time PLOAM message and be handed down to ONU, as shown in Table 2, promptly use the 8-12 byte of reserving that packet number is sent to ONU.
| Byte number | Content | Describe |
| ??1 | ??ONU-ID | To appointment |
| ??2 | ??00000100 | Message identifier |
| ??3 | ??0000000b | ' 0 ': the service aisle equilibrium |
| Time delay ' 1 ': protection channel-equalization time delay | ||
| ??4 | ??dddddddd | The MSB of time delay |
| ??5 | ??dddddddd | |
| ??6 | ??dddddddd | |
| ??7 | ??dddddddd | The LSB of time delay |
| ??8-12 | Do not stipulate | Reserve |
Table two
3, newly-increased PLOAM message comprises packet number in this newly-increased PLOAM message at least.
4, (ONU Management and Control Interface, OMCI) passage issues grouping to ONU by ONU management control interface.
After ONU receives the packet number that issues, send response message to confirm the distribution of OLT by PLOAM or OMCI passage, the response message that ONU sends is for sending the corresponding message of message with its OLT that receives.
After receiving the assignment response message of ONU, the newly-built public ONU registration table of OLT side will record in the ONU registration table to the packet number that ONU distributes; Perhaps after receiving the assignment response message of ONU, newly-increased list item will record to the packet number that ONU distributes in this newly-increased list item in the ONU registration table of having set up.This ONU registration table can be arranged in OLT, also can be at webmaster or more in the processing module on upper strata; Can realize by software module.As shown in Table 3, comprise sequence number SN and the affiliated packet number Group-ID of ONU in this ONU registration table at least, also can include but not limited to: ONU-ID, the Alloc-ID, the GEM port-ID that distribute to ONU.
| ??SN | ??Group-ID |
| ??SN1 | ??G1 |
| ??SN2 | ??G2 |
| ??... | ??... |
Table three
As shown in Figure 8, in the communication process between OLT and ONU,, can use reservation position in up GTC frame and the descending GTC frame to come identification packet number respectively in order to identify different grouping; Perhaps by increasing identification field, packet number under in newly-increased identification field, filling.Use reservation position in the descending GTC frame to come identification packet number, its position is the reserved field Reserved of descending GTC frame overhead part:
As shown in Figure 9, using reservation position in the up GTC frame to come identification packet number, its position is bit0～bit4 among the reserved field-Ind of up GTC frame overhead part:
For the latter, can be identification field of overhead part increase: as shown in Table 4: newly-increased identification field GTC-ID in the PCBd of descending GTC frame at descending and up GTC frame:
Table four
Shown in the table five: newly-increased identification field GTC-ID among the PLOu of up GTC frame:
| ??Preamble ??a?byte | ??Delimiter ??a?byte | ??BIP ??1byte | ??ONU-ID ??1byte | ??Ind ??1byte | ??GTC-ID ??2bit?or?more |
Table five
For guaranteeing correctness, can add a CRC check field in the back of this newly-increased identification field, realize verification to identification field, guarantee correctly to receive.
Downlink data processing procedure: each PLOAM module, GEM TC adaptor module and DBA control module among the OLT as shown in Figure 2, handle the data that belong to same grouping respectively, GTC becomes the data of frame module reception from each grouping, by inquiry ONU registration table, PLOAM message (if having this message to issue), GEM piece, the BW that will belong to same grouping authorize and are multiplexed in the same descending GTC frame, and in this GTC frame identification field, fill packet number, send then.
Now illustrate the specific implementation that grouping sends, suppose to have 9 ONU, be divided into 3 groups.Wherein ONU1, ONU2, ONU3 belong to Group1; ONU4, ONU5, ONU6 belong to Group2; ONU7, ONU8, ONU9 belong to Group3.To issue ONU1, ONU2, ONU3 so, and promptly issue all data of Group1 and be encapsulated in the GTC frame with related control information mutually, GTC-ID is filled to Group1, as shown in figure 10:
In descending GTC frame, surpassed the GTC border if issue last GEM frame length of Group1, the set time length 125 μ s that promptly exceed the GTC frame, then needing to carry out burst handles, to guarantee that first minute leaf length is in the scope of GTC frame, the residue burst transmits in the GTC frame under this grouping of the next one, and specifically dividing chip technology is techniques well known, repeats no more herein.
ONU is to the processing of received downlink data: as shown in Figure 3, after ONU receives the GTC frame signal, GTC filtering frames device by ONU, the descending GTC frame that receives is simply resolved, read the identification field in the frame overhead, carry out filter operation: the packet number under the packet number that identification field is carried in the more descending GTC frame and this ONU if both are not inconsistent, then abandons this GTC frame; If both conform to, then the GTC frame is transmitted to GTC and becomes frame module, by prior art this downlink information is handled, do not repeat them here.Wherein, packet number can be kept in the memory cell of ONU self under this ONU; Also can be kept at point under this ONU in the multiple spot multi-plexing light accessing system in other memory cell, as long as this ONU can visit these other memory cell and obtain packet number.
Upstream data processing procedure: ONU will be kept at the packet number of this ONU in the memory cell when sending up GTC frame, be filled in the identification field of up GTC frame.But shown in the particular location reference table five.
After OLT receives the uplink information of ONU transmission, as shown in Figure 4, the GTC of OLT becomes frame module according to the packet number of filling in the GTC frame identification field, the definite target processing module that will transmit, the PLOAM message of then demultiplexing being come out (uploading if this message is arranged), DBA message and GEM piece are transmitted to the respective handling module.Module and the grouping of handling PLOAM message, DBA message and GEM piece are corresponding one by one, n grouping are for example arranged, then the module to there being n to handle PLOAM message, DBA message and GEM piece in the system.For example, after the GTC of OLT becomes frame module to receive the GTC frame, GTC-ID field according to this GTC frame, determine that this frame comes from group1, promptly need to be transmitted to the processing module of handling group1, this GTC frame is carried out demultiplexing, the PLOAM message that then demultiplexing is obtained (uploading if this message is arranged) is transmitted to corresponding PLOAM1 resume module, the GEM piece is transmitted to corresponding GEM TC adapter 1 resume module, controls 1 resume module for corresponding DBA the DBA forwards.The wherein simple earlier usually GTC frame of resolving, the processing module of the definite correspondence grouping that will transmit is carried out demultiplexing to the GTC frame again; But also can carry out demultiplexing earlier and determine to transmit the purpose processing module again.If the value of GTC-ID is group2, then the relevant information that demultiplexing is obtained is transmitted to corresponding PLOAM2 module, GEM TC adapter 2 modules, DBA and controls 2 resume module.Wherein, PLOAM module, GEM TC adaptor module, DBA control module and prior art are identical, do not repeat them here.
Embodiment two: present embodiment provides a kind of optical line terminal, be applicable to some the multi-plexing light accessing system of multiple spot: be illustrated in figure 5 as the structure of OLT, comprise that at least two PLOAM modules 502, at least two DBA control modules 503, at least two GEM TC adaptor modules 504 become frame module 501 with GTC.
Wherein, each PLOAM module, DBA control module and GEM TC adaptor module function are same as the prior art, difference just in the present embodiment each module number be a plurality of and PLOAM module, DBA control module and the GEM TC adaptor module of a correspondence all arranged that each PLOAM module, DBA control module or GEM TC adaptor module are only handled the information of its corresponding grouping corresponding to each grouping of ONU.For example, the PLOAM1 module is only handled the PLOAM message that belongs to the Group1 that divides into groups; The PLOAM2 resume module belongs to the PLOAM message of the Group2 that divides into groups; DBA control module and GEM TC adaptor module are also together.
The PLOAM module is used to handle the PLOAM message (uploading if this message is arranged) of up correspondence grouping of the GTC framing module forwards of OLT; The GTC that the descending correspondence grouping PLOAM message that need are sent sends to OLT becomes frame module, to form downstream signal.
The DBA control module is used to handle the DBA message of up correspondence grouping of the GTC framing module forwards of OLT; The GTC that the descending correspondence grouping DBA control messages that need are sent sends to OLT becomes frame module, to form downstream signal.
GEM TC adaptor module is used to handle the GEM piece of resolving the corresponding grouping in back, and the GEM frame is encapsulated or decapsulation.The correspondence grouping GEM piece message that need are sent sends to GTC one-tenth frame module, to form downstream signal.
GTC becomes frame module to be used for behind the up GTC frame that receives from ONU, according to the packet number of filling in this GTC frame identification field that receives, the definite target processing module that will transmit, be about to PLOAM message (uploading), DBA message and GEM piece that demultiplexing comes out, be transmitted to PLOAM module, DBA control module and the GEM TC adaptor module of handling respective packets if this message is arranged;
Also be used to receive data (PLOAM message (if having this message to issue), GEM piece and DBA message) from each grouping, according to the ONU registration table, PLOAM message (if having this message to issue), GEM piece, the BW that will belong to same grouping authorize and are multiplexed in the same descending GTC frame, and in this GTC frame identification field, fill packet number, send then.Concrete, the data that belong to all ONU of a grouping are encapsulated in the GTC frame, as shown in Table 6 with related control information mutually.
OLT can also comprise ONU grouping module and ONU registration table 505.
Wherein, the ONU grouping module, being used for when ONU registers is ONU allocation packets number.This ONU grouping module can be positioned at any one PLOAM module of OLT.This ONU grouping module also can be arranged in webmaster outside the OLT or the upper strata processing module outside the OLT.The ONU registration table is used for after OLT receives the assignment response message of ONU, is recorded as the packet number that ONU distributes.Reference table three, ONU registration table comprise sequence number and the affiliated packet number of ONU at least, also can include but not limited to distribute to ONU-ID, Alloc-ID, the GEM port-ID of ONU.The ONU registration table also can be arranged in the webmaster outside the OLT or the processing module on OLT upper strata.The ONU registration table is realized can realizing by software flexibly, also can is hardware module.
Embodiment three: present embodiment provides a kind of optical network unit ONU/Optical Network Terminal ONT, is convenient statement, and below unified is example with ONU, and this ONU is applicable to the multi-plexing light accessing system that a little arrives multiple spot:
Be illustrated in figure 6 as the structure of the ONU that present embodiment provides, comprise GTC filtering frames device 602, GTC becomes frame module 601.
GTC filtering frames device is used for the descending GTC frame that receives is simply resolved, read the identification field in the frame overhead, carry out filter operation: packet number that identification field is carried in the more descending GTC frame and the packet number of ONU itself, if both differences, then abandon this GTC frame, if both are identical, the GTC frame that then this is received is transmitted to GTC and becomes frame module to handle.
GTC becomes frame module to be used for ONU when sending up GTC frame, and the packet number that is kept at this ONU itself in the memory cell is filled in the identification field of up GTC frame; The GTC frame that the GTC filtering frames device that receives is transmitted is resolved, and demultiplexing goes out PLOAM message (uploading if this message is arranged), BW authorization messages and GEM piece, and is transmitted to corresponding PLOAM module, DBA control module and the processing of GEM TC adaptor module.The processing procedure of PLOAM module, DBA control module and GEM TC adaptor module is prior art, does not repeat them here.
ONU can also comprise memory cell 603, and this memory cell is used to preserve the packet number of this ONU self.Its initial value is G0 (such as 0 or complete 1), after the packet number assignment messages of receiving from OLT, uses the packet number of distributing to replace original value.ONU can obtain packet number under this ONU by visiting this memory cell.This memory cell also can be positioned on the equipment that webmaster or other ONU can visit.This memory cell should be the permanent storage unit, i.e. power down can not lost institute's canned data yet.
Embodiment four: present embodiment provides a kind of point to the multiple spot multi-plexing light accessing system:
As shown in Figure 7, the point that present embodiment provides comprises optical line terminal OLT to the multiple spot multi-plexing light accessing system, Optical Network Terminal ONT/ optical network unit ONU, Optical Distribution Network ODN, ONU registry hive and memory cell.
Wherein, OLT divides into groups to ONU when ONU registers, packet number is sent to corresponding ONU, the PLOAM message that belongs to same grouping (if having this message to issue), GEM piece, BW that needs are issued authorize and are multiplexed in the same descending GTC frame, and in identification field, fill the grouping that packet number identifies this GTC frame purpose ONU, then this GTC frame is sent; Behind the up GTC frame that receives the ONU transmission, the GTC of OLT becomes frame module according to the packet number of filling in the GTC frame identification field, the target processing module of the definite correspondence grouping that will transmit, with PLOAM message (uploading if this message is arranged), DBA message and the GEM piece that demultiplexing comes out, the target processing module that is transmitted to corresponding grouping is handled.
ONU is when receiving the GTC frame that OLT issues, the GTC filtering frames device of ONU filters the GTC frame that this receives, relatively packet number that identification field is carried in this descending GTC frame and the packet number of ONU self, if both differences, then abandon this GTC frame, if both are identical, then carry out corresponding subsequent treatment; When sending up GTC frame, the GTC of ONU becomes frame module that the packet number of ONU self is filled in the identification field of up GTC frame, and sends.
The ONU registry hive is used for when ONU registers, receive the assignment response message of ONU as OLT after, the sequence number of record ONU and be the packet number of this ONU distribution; And, the GTC of OLT provides the inquiry of ONU packet number for becoming frame module.This ONU registering unit can be positioned at OLT inside, also can be arranged in this other equipment to the multiple spot multi-plexing light accessing system, as webmaster or upper strata processing module more.
Memory cell is used to receive and preserve the packet number that ONU that OLT issues is assigned with, and becomes frame module that the inquiry of ONU packet number is provided for the GTC of GTC filtering frames device and ONU.This memory cell can be positioned at ONU inside, also can be arranged in this other equipment to the multiple spot multi-plexing light accessing system, as webmaster.
The embodiment of the invention uses GTC frame overhead identification field partly to identify the grouping of ONU by ONU is divided into groups, and can realize the support to the point-to-point multi-plexing light accessing system of big branching ratio, realizes the increase of network capacity, thereby reduces single user cost; The scheme that adopts the embodiment of the invention to provide can be supported the PON system of bigger branching ratio flexibly, supports seamless dilatation (if branching ratio further enlarges in the future, only need to increase packet count and get final product); In addition, can also alleviate the information processing amount of ONU, reduce unnecessary power consumption.
More than a kind of point that the embodiment of the invention provided is described in detail to the method, apparatus and system that multiple spot multi-plexing light accessing system data transmit, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (15)
1. the method that transmits of some data in the multiple spot multi-plexing light accessing system is characterized in that, comprise,
OLT is according to the ONU registration table, and the data and the control information that will have the ONU of same packets number are encapsulated in a Gigabit Passive Optical Network Transmission Convergence agreement
In the GTC frame, and in this GTC frame identification field, fill this packet number, send then;
After ONU received the GTC frame that OLT sends, relatively this identification field that receives GTC frame packet number of carrying and the packet number of this ONU self abandoned this GTC frame if both are not inconsistent; If both conform to this GTC frame is handled.
2. the method that data transmit in the multiple spot multi-plexing light accessing system as claimed in claim 1 is characterized in that, before the described step of claim 1, also comprises:
When ONU registers, ONU is carried out the distribution of packet number, in the ONU registration table, be recorded as the packet number that ONU distributes, and the packet number of distributing is sent to corresponding ONU.
3. the method that data transmit in the multiple spot multi-plexing light accessing system as claimed in claim 1 or 2 is characterized in that: the identification field of described GTC frame identification field for partly increasing at the GTC frame overhead; It perhaps is the reserved field of GTC frame overhead part.
4. the method that data transmit in the multiple spot multi-plexing light accessing system as claimed in claim 1 or 2, it is characterized in that: after described ONU receives the GTC frame of OLT transmission, relatively this identification field that receives GTC frame packet number of carrying and the packet number of this ONU self abandon this GTC frame if both are not inconsistent; If both are identical this GTC frame handled and to be specially:
After ONU receives the GTC frame that OLT sends, the packet number of the ONU self that preserves according to described ONU stored unit, if relatively this identification field that receives GTC frame packet number of carrying and the packet number of this ONU self are both differences then abandon this GTC frame; If both are identical this GTC frame is handled.
5. the method that transmits of some data in the multiple spot multi-plexing light accessing system is characterized in that, comprise,
ONU is filled into the packet number of self in the identification field of up GTC frame, and sends;
OLT according to the packet number that this identification field that receives the GTC frame is carried, determines corresponding target processing module after receiving the GTC frame that ONU sends, and the target processing module that is forwarded to described correspondence is handled.
6. the method that data transmit in the multiple spot multi-plexing light accessing system as claimed in claim 5 is characterized in that, before the described step of claim 5, also comprises:
When ONU registers, ONU is carried out the distribution of packet number, and the packet number of distributing is sent to corresponding ONU.
7. the method that data transmit in the multiple spot multi-plexing light accessing system as claimed in claim 5 is characterized in that the packet number that this identification field that receives the GTC frame of described basis is carried determines that target processing module is specially:
The packet number of carrying according to this identification field that receives the GTC frame, determine to handle among the described OLT PLOAM module, DBA control module and the GEM TC adaptor module of corresponding grouping, perhaps handle the DBA control module and the GEM TC adaptor module of corresponding grouping, be described target processing module.
8. an optical line terminal is characterized in that, comprise, and at least two PLOAM modules, at least two GEM TC adaptor modules, at least two DBA control modules become frame module with GTC;
Wherein, described GTC one-tenth frame module is used to receive the information from each PLOAM module, DBA control module and GEM TC adaptor module, according to the ONU registration table, the data and the control information that will have the ONU of same packets number are encapsulated in the GTC frame, in this GTC frame identification field, fill this packet number, send then; When receiving the GTC frame, according to the identification field of this GTC frame that receives, determine the target processing module of corresponding grouping, the GTC frame to be resolved, the information after will resolving then is transmitted to the target processing module of corresponding grouping and handles;
Described PLOAM module is used to handle the PLOAM message of the correspondence grouping of described GTC framing module forwards; The correspondence grouping PLOAM message that need are sent sends to described GTC one-tenth frame module;
Described DBA control module is used to handle the DBA message of corresponding grouping after the parsing of described GTC framing module forwards; The correspondence grouping DBA control messages that need are sent sends to described GTC one-tenth frame module;
Described GEM TC adaptor module is used to handle the GEM piece of corresponding grouping after the parsing of described GTC framing module forwards; The correspondence grouping GEM piece message that need are sent sends to described GTC one-tenth frame module.
9. optical line terminal as claimed in claim 8 is characterized in that, also comprises:
The ONU grouping module is positioned on any one described PLOAM module, and being used for when ONU registers is ONU allocation packets number.
10. optical line terminal as claimed in claim 8 or 9 is characterized in that, also comprises:
The ONU registration table is used to write down the sequence number of described ONU and the packet number of correspondence; For becoming frame module, described GTC provides the inquiry of ONU packet number.
11. optical network unit or Optical Network Terminal comprise PLOAM module, DBA control module and GEM TC adaptor module, it is characterized in that, also comprise:
GTC filtering frames device becomes frame module with GTC;
Wherein, described GTC filtering frames device is used for when receiving the GTC frame, and the packet number that identification field is carried in the more described GTC frame that receives and the packet number of this network unit/optical network terminal itself if both do not conform to, then abandon this GTC frame; If both conform to, then the described GTC frame that receives is transmitted to described GTC and becomes frame module;
Described GTC becomes frame module to be used to receive the GTC frame that described GTC filtering frames device is transmitted, and this GTC frame is resolved, and the information after will resolving is transmitted to PLOAM module, DBA control module and GEM TC adaptor module; When optical network unit or Optical Network Terminal send the GTC frame, the packet number of this network unit/optical network terminal self is filled in the identification field of up GTC frame, and sends.
12. network unit/optical network terminal as claimed in claim 11 is characterized in that, also comprises:
Memory cell, the packet number that is used to preserve this ONU self, and provide the inquiry of packet number for GTC becomes frame module.
13. a point is characterized in that to the multiple spot multi-plexing light accessing system, comprises optical line terminal, Optical Network Terminal/optical network unit, optical distribution network, ONU grouped element, ONU registry hive and memory cell;
Wherein, described ONU grouped element, being used for when ONU registers is ONU allocation packets number;
Described optical line terminal is used for described packet number is sent to corresponding ONU; According to the ONU registry hive, the PLOAM message that belongs to same grouping, GEM piece and BW mandate that needs are issued are multiplexed in the same descending GTC frame, fill packet number in identification field, then this GTC frame are sent; Behind the up GTC frame that receives the ONU transmission, according to the identification field of this up GTC frame, determine the target processing module of corresponding grouping, handle by the target processing module of this correspondence grouping;
Described Optical Network Terminal/optical network unit is used for when receiving the GTC frame, and relatively the packet number of carrying of the identification field in this GTC frame that receives and the packet number of this Optical Network Terminal/optical network unit self if both are not inconsistent, then abandon this GTC frame; If both conform to, then this GTC frame that receives is handled; When sending up GTC frame, the packet number of this Optical Network Terminal/optical network unit self is filled in the identification field of up GTC frame, and sends;
Described ONU registry hive is used for the sequence number and the corresponding packet number of the recording light network terminal/optical network unit at least; The inquiry of packet number is provided for optical line terminal;
Described memory cell is used to preserve the packet number that described OLT issues, for Optical Network Terminal/optical network unit provides the packet number inquiry.
14. a kind of point as claimed in claim 13 is characterized in that to the multiple spot multi-plexing light accessing system described ONU grouped element is positioned at optical line terminal or webmaster or other upper strata processing modules.
15. to the multiple spot multi-plexing light accessing system, it is characterized in that described ONU registry hive is positioned at optical line terminal or webmaster or other upper strata processing modules as claim 13 or many or 14 described a kind of points.
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| CN200810068041A CN101616338A (en) | 2008-06-24 | 2008-06-24 | A kind of method, apparatus and system that data transmit in the multiple spot multi-plexing light accessing system |
| PCT/CN2009/072303 WO2009155832A1 (en) | 2008-06-24 | 2009-06-16 | Point to multi-point optical access system and its data transmission method and device |
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| CN200810068041A CN101616338A (en) | 2008-06-24 | 2008-06-24 | A kind of method, apparatus and system that data transmit in the multiple spot multi-plexing light accessing system |
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| CN102388566A (en) * | 2011-09-26 | 2012-03-21 | 华为技术有限公司 | Method, device and system for converting identifier of terminal device |
| CN106464518A (en) * | 2015-05-25 | 2017-02-22 | 华为技术有限公司 | Message transmission method, device and system |
| WO2020007246A1 (en) * | 2018-07-02 | 2020-01-09 | 中兴通讯股份有限公司 | Method for managing onu, olt, onu, system and storage medium |
| CN113993009A (en) * | 2020-07-27 | 2022-01-28 | 上海诺基亚贝尔股份有限公司 | Method and device for multi-domain transmission by time synchronization, OLT and ONU |
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| CN101986719A (en) * | 2010-11-19 | 2011-03-16 | 杭州开鼎科技有限公司 | Method for expanding registered frame in EPON system |
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| JP3695447B2 (en) * | 2002-02-27 | 2005-09-14 | 日立電線株式会社 | Virtual LAN connection device |
| CN101079801A (en) * | 2006-05-25 | 2007-11-28 | 华为技术有限公司 | Method for transmitting uplink control packet in Gbit passive optical network system |
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| CN102316388A (en) * | 2010-07-09 | 2012-01-11 | 中兴通讯股份有限公司 | Flexible QinQ realization method and device for passive optical network system |
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| CN102316388B (en) * | 2010-07-09 | 2016-03-30 | 中兴通讯股份有限公司 | Selective QinQ implementation method in a kind of passive optical network and device thereof |
| CN102388566A (en) * | 2011-09-26 | 2012-03-21 | 华为技术有限公司 | Method, device and system for converting identifier of terminal device |
| WO2012149770A1 (en) * | 2011-09-26 | 2012-11-08 | 华为技术有限公司 | Method, device and system for converting terminal device identifiers |
| CN102388566B (en) * | 2011-09-26 | 2014-03-05 | 华为技术有限公司 | Method, device and system for converting identifier of terminal device |
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| WO2020007246A1 (en) * | 2018-07-02 | 2020-01-09 | 中兴通讯股份有限公司 | Method for managing onu, olt, onu, system and storage medium |
| CN110677747A (en) * | 2018-07-02 | 2020-01-10 | 中兴通讯股份有限公司 | Method for managing ONU, OLT, ONU, system and storage medium |
| EP3820157A4 (en) * | 2018-07-02 | 2022-03-30 | ZTE Corporation | Method for managing onu, olt, onu, system and storage medium |
| CN110677747B (en) * | 2018-07-02 | 2022-04-05 | 中兴通讯股份有限公司 | Method for managing ONU, OLT, ONU, system and storage medium |
| CN113993009A (en) * | 2020-07-27 | 2022-01-28 | 上海诺基亚贝尔股份有限公司 | Method and device for multi-domain transmission by time synchronization, OLT and ONU |
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