CN101494595B

CN101494595B - Method and system for forwarding data message, coaxial line terminal and optical network unit

Info

Publication number: CN101494595B
Application number: CN2008100565980A
Authority: CN
Inventors: 于洋
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: New H3C Technologies Co Ltd
Priority date: 2008-01-22
Filing date: 2008-01-22
Publication date: 2012-02-08
Anticipated expiration: 2028-01-22
Also published as: CN101494595A

Abstract

The invention discloses a data message transmission method applied to a plurality of coaxial circuit terminals (CLT). An optical network unit (ONU) is used as an Ethernet passive coaxial network (EPCN) system of an uplink interface card, and sets a corresponding queue unit for each CLT connected with the system in the ONU; and when receiving an uplink data message, the ONU transmits the uplink data message by the queue unit corresponding to the original CLT of the uplink data message, thus leading each CLT to obtain independent uplink bandwidth resources. The invention also discloses a data message transmission system, the ONU used as the uplink interface card and the CLT, which all can lead each CLT to obtain the independent uplink bandwidth resources.

Description

Data message forwarding method, system and coaxial line terminal, optical network unit

Technical field

The present invention relates to data transmission technology; Be specifically related to be applied to a plurality of coaxial line terminal (CLT; Coaxial Line Terminal) utilizes an optical network unit (ONU; Optical Network Unit) as data message forwarding method, the data message forwarding system of the Ethernet passive coaxial network (EPCN, Ethernet Passive CoaxialNetwork) of upstream Interface card, and a kind of ONU and a kind of CLT as the upstream Interface card.

Background technology

At present, need to use ONU in Ethernet passive optical network (EPON, the EthernetPassive Optical Network) system as the upstream Interface card of the CLT in the EPCN system under a lot of situation in market.

When a plurality of CLT cascades, when forming the EPCN cascade system, the CLT of a plurality of cascades uses an ONU as the upstream Interface card.Fig. 1 has provided that a plurality of CLT use the sketch map of an ONU as the upstream Interface card in existing a kind of EPCN cascade system; As shown in Figure 1; N CLT in this EPCN cascade system is after cascade; Link to each other with an ONU as the upstream Interface card through gigabit Ethernet (GE, Gigabit Ethernet) interface, n is the integer more than or equal to 1.The downstream interface of CLT also can link to each other with a plurality of coaxial network units (CNU, Coaxial NetworkUnit) in the EPCN system of place, and the upstream Interface of ONU also can link to each other with the OLT in the EPON system of place.

Wherein, each CLT comprises first order queue scheduling unit and queue scheduling unit, the second level.First order queue scheduling unit receives uplink data messages through user interface, is stored in earlier in the memory cell of CLT, ranks again, after first order scheduling, by the order after the scheduling uplink data messages is sent to queue scheduling unit, the second level; Wherein, first order scheduling is the inner scheduling of this CLT that the data message from user interface is carried out.That lines up and dispatch usually specifically is embodied as: according to user that pending uplink data messages is carried and/or business; Pending uplink data messages put into user and/or professional corresponding queues rank; Then according to the priority of individual queue, the data message in the preferential output priority high queue.

Queue scheduling unit, the second level; Reception is through the uplink data messages of first order queue scheduling; The uplink data messages that is received comprises from the uplink data messages of first order queue scheduling unit among the CLT of place and the uplink data messages of sending from the CLT with the direct cascade of place CLT; Then the uplink data messages that is received is carried out the queue scheduling second time, by the order after the scheduling with uplink data messages direct or indirect send to ONU.Wherein, second level queue scheduling is the scheduling between CLT, and this queue scheduling carries out according to the preset CLT priority that is provided with or the priority of uplink data messages institute bearer service usually.When ONU sends message, CLT 1 directly sends the uplink data messages through local twice scheduling to ONU through the GE interface, and CLT i sends the uplink data messages through local twice scheduling to CLT (i-1), i is 2,3 ..., n.CLT n only need zhang once dispatch the upstream data newspaper that receives through user interface, can directly send to CLT (n-1).

ONU; Receive uplink data messages through the GE interface from CLT; Be stored in earlier in the outside or internal storage unit of ONU; LLID (LLID, Logic Link Identification) queue unit is ranked to the data message in the memory cell again, then through same LLID interface output as the ascending physical signal passage.

Here, ONU is single LLID ONU, i.e. corresponding LLID of ONU, each ONU receive only the data message that has self LLID.Each single LLID ONU comprises a LLID queue unit, and this LLID queue unit comprises the formation of a plurality of different priorities.So; Uplink data messages from different CLT will be put into the different queue of same LLID formation according to different user and/or different business; According to queue priority, timesharing is through same LLID interface output, and preferential output priority is than the message in the high queue then.

It is thus clear that in the existing EPCN cascade system, which CLT ONU is indifferent to data message from, but all CLT share the uplink bandwidth resource of same LLID formation, rank and forwarding one by one according to the priority of data message.Under the uplink data messages pass-through mode in the therefore existing EPCN cascade system, the uplink bandwidth resource that each CLT obtains is not independently, but can receive the influence that other CLT transmit Business Stream.

The source CLT that below will be called this uplink data messages through the CLT that user interface receives uplink data messages; So; When the forwarding of the ONU among Fig. 1 source CLT is the low priority uplink data messages of CLT 1; Source CLT is that the uplink data messages of the high priority of CLT 2 also arrives this ONU continually, and this moment, ONU can transfer the uplink data messages of handling CLT 2 to, causes the high uplink data messages of priority to tie up the bandwidth that the relatively low upstream data of priority is reported zhang.In this case, source CLT is that the uplink data messages of CLT 1 may rest in the memory cell, slowly can't be forwarded, and causes from uplink data messages Forwarding Latency in ONU of CLT 1 long.

Summary of the invention

In view of this, the invention provides a kind of data message forwarding method, be applied to a plurality of CLT and utilize the EPCN system of an ONU, make that each CLT obtains independently uplink bandwidth resource as the upstream Interface card.

This method comprises: when said ONU receives uplink data messages, through with the source CLT corresponding queues unit forwards of said uplink data messages.

Preferably, said in ONU, for each coupled CLT correspondence is provided with a queue unit be: in the ONU that supports multi-logical link sign LLID, each CLT that will link to each other with this OUN distributes a LLID queue unit

When said ONU receives uplink data messages; Source CLT corresponding queues unit forwards through with said uplink data messages is: said ONU receives uplink data messages; Confirm the LLID queue unit corresponding, said uplink data messages is forwarded through determined LLID queue unit with the source CLT of said uplink data messages.

This method further comprises: said ONU receives the corresponding relation of user configured CLT sign and LLID queue unit; Each CLT adds self CLT sign in the uplink data messages that receives through self user interface, send to ONU;

Said definite LLID formation corresponding with the source CLT of said uplink data messages is: said ONU obtains the CLT sign from the uplink data messages that is received, according to said corresponding relation, and the corresponding LLID queue unit of CLT sign of confirming and being obtained.

Preferably, said CLT is designated the media access control MAC address of CLT;

Said each CLT adds self CLT and is designated in the uplink data messages that receives through self user interface: each CLT is in the uplink data messages that receives through self user interface; Adding source MAC is the outer MAC head of self MAC address, and the uplink data messages of adding outer MAC head is sent to said ONU;

Said ONU obtains the CLT sign from the uplink data messages that is received; According to said corresponding relation; The corresponding LLID queue unit of CLT sign of confirming and being obtained is: said ONU obtains source MAC from the outer MAC head of the uplink data messages that is received; According to said corresponding relation, confirm the LLID queue unit corresponding with source MAC;

Said said uplink data messages is transmitted through determined LLID formation is: the uplink data messages of transmitting the outer MAC head of deletion through the said LLID queue unit corresponding with source MAC.

Preferably, said outer MAC head further comprises cascaded message;

The said source MAC that obtains further comprises before: when the cascaded message of reception uplink data messages ectomesoderm MAC head is shown as cascade, carry out said operation of obtaining source MAC.

Preferably, said ONU transmits before the said uplink data messages after receiving said uplink data messages, further the uplink data messages that is received is buffered in ONU inside or external memory unit.

The present invention also provides a kind of optical network unit ONU as the upstream Interface card, makes each CLT obtain independently uplink bandwidth resource.

This ONU comprises corresponding unit and queue unit for the corresponding setting of each CLT that links to each other with this ONU, wherein,

Said corresponding unit is used to receive uplink data messages, confirms and the CLT corresponding queues unit, source of said uplink data messages, and said uplink data messages is sent to determined queue unit;

Said queue unit is used to transmit the uplink data messages that is received from said corresponding unit.

Preferably, said ONU supports many LLID, the LLID queue unit corresponding to coupled each CLT of said queue unit in many LLID ONU, being provided with.

The present invention also provides a kind of ONU of employing CLT as the upstream Interface card, can make that each CLT obtains independently uplink bandwidth resource.

This CLT comprises unit and adding device is set;

The said unit that is provided with is used to receive the CLT distinctive mark of user for self disposing;

Said adding device is used for adding said CLT distinctive mark in the uplink data messages that receives through user interface, and the uplink data messages of carrying said CLT distinctive mark is sent to said ONU.

The present invention provides a kind of data message forwarding system again, is applied to a plurality of CLT and utilizes the EPCN system of an ONU as the upstream Interface card, makes that each CLT obtains independently uplink bandwidth resource.

This data message forwarding system comprises a plurality of CLT and the ONU as the upstream Interface card, it is characterized in that,

Said CLT is used to receive the CLT distinctive mark of user for self disposing, and in the uplink data messages that receives through user interface, adds said CLT distinctive mark, and the uplink data messages of carrying said CLT distinctive mark is sent to said ONU;

Said ONU is included as the queue unit that each coupled CLT is provided with, with the uplink data messages of carrying the CLT distinctive mark that receives, through going out with said CLT distinctive mark corresponding queues unit forwards.

Wherein, said ONU supports many LLID.

Visible according to above technical scheme, the present invention makes each CLT all have own queue unit, and feasible uplink data messages from homology CLT not is through forwarding with source CLT corresponding queues.Transmit because the individual queue unit independently carries out message, be independent of each other, so each CLT can obtain independently uplink bandwidth resource.Preferably, this ONU with a plurality of queue unit can adopt existing many LLID ONU.

Wherein, can in ONU, preserve the corresponding relation of CLT and LLID, the CLT sign of representing source CLT is carried in the uplink data messages, send to ONU, confirm to handle the LLID formation of this uplink data messages by ONU according to corresponding relation.

Through can the CLT sign being carried in the uplink data messages the uplink data messages transformation that is transmitted between CLT and the ONU: CLT is the outer MAC head of self MAC address for treating that the forwarding uplink data message adds source MAC when the forwarding uplink data message.ONU confirms to handle the LLID queue unit of this uplink data messages according to the MAC Address and the LLID formation corresponding relation of source MAC in the outer MAC head and record.The mode of this interpolation MAC head makes that improved uplink data messages can normal propagation in existing Ethernet.

In addition, for compatible, can also in the MAC head, add cascaded message with existing non-cascade system.For the uplink data messages of cascade system, ONU carries out data forwarding operation of the present invention, and for the uplink data messages of non-cascade system, ONU carries out existing data forwarding operation.

Description of drawings

Fig. 1 is that a plurality of CLT use the sketch map of an ONU as the upstream Interface card in existing a kind of EPCN cascade system.

Fig. 2 is the flow chart of uplink data messages retransmission method in the embodiment of the invention EPCN cascade system.

Fig. 3 is the uplink data messages sketch map of two-layer MAC head among the embodiment.

Fig. 4 is the structural representation of data message forwarding system in the embodiment of the invention.

Fig. 5 is the structural representation of corresponding unit among Fig. 4.

Embodiment

Below in conjunction with the accompanying drawing embodiment that develops simultaneously, describe the present invention.

The present invention is a kind of data message forwarding scheme; Be applied to a plurality of CLT and utilize the EPCN system of an ONU, adopt to support many LLID, comprise that many LLID ONU of a plurality of separate LLID queue unit replaces single LLID ONU of the prior art as the upstream Interface card.

In the embodiment of the invention; Corresponding CLT of each LLID queue unit among many LLID ONU; ONU is when ranking to the uplink data messages that is received; To send to the LLID formation corresponding from the uplink data messages of different source CLT, wait that through LLID queue unit queue scheduling exporting uplink data messages forwards through many LLID interface with source CLT.Like this, a LLID queue unit is only handled the uplink data messages from a CLT, and each CLT exclusively enjoys a LLID formation.Because each LLID queue unit works alone among many LLID ONU, not mutual bandwidth-hogging makes each CLT obtain independently uplink bandwidth resource.

Wherein, source CLT is meant through self user interface and receives uplink data messages and be transmitted to the CLT of ONU.

Wherein, Each LLID queue unit among many LLID ONU all comprises the formation of a plurality of different priorities; Priority is according to user and/or traffic differentiation; Each LLID queue unit is independent of each other, and handles the uplink data messages in self formation respectively, and forwards through many LLID interface of place ONU.

The queue scheduling mode of the LLID queue unit among each LLID queue unit queue scheduling mode and the single LLID ONU is identical: according to user that pending uplink data messages is carried and/or business; Pending uplink data messages is put into respective queue; According to queue priority, the preferential high formation message of output priority.How many LLID interface sends message is prior art, just is not described in detail here.

Certainly; In reality, also can adopt other ONU that comprises a plurality of queue unit as the upstream Interface card; A plurality of queue unit perhaps are set to handle from the upstream data newspaper of CLT zhang in ONU; As long as each queue unit is separate, and the data message of a CLT of each queue unit individual processing gets final product.

The present invention is applicable to that a plurality of CLT utilize the EPCN cascade system of an ONU as the upstream Interface card.Below be example with the cascade system shown in Fig. 1, be example with many LLID ONU as the upstream Interface card, data message forwarding method of the present invention is described in detail.Certainly, data message forwarding method of the present invention can also use with other cascade systems under the EPCN cascade system, for example CLT 2～CLT n directly level be coupled to same CLT 1.

Fig. 2 shows in the embodiment of the invention flow chart of upstream data newspaper zhang retransmission method in the EPCN cascade system, and as shown in Figure 2, this method may further comprise the steps:

Step 200: many LLID ONU receives the corresponding relation of user configured CLT sign and LLID queue unit and is kept at self.

Step 201: each CLT receives uplink data messages from user interface, before the queue scheduling of the second level, adds self CLT sign to the uplink data messages that is received, and directly or indirectly sends to many LLIDONU.This CLT sign is to distinguish the distinguishing identifier of each CLT, for example can be medium access control (MAC, the Media Access Control) address of CLT, or CLT ID.CLT is before or after can being the first order queue scheduling opportunity of message adding self CLT sign.

Wherein, for the CLT that links to each other with ONU through the GE interface, CLT directly sends to ONU through the uplink data messages that the GE interface will carry the CLT sign; For via the CLT that links to each other indirectly with other CLT of its cascade and ONU, the uplink data messages that CLT will carry the CLT sign sends to ONU via the CLT of cascade direct with it.

Wherein, CLT is identical with prior art with second level queue scheduling mode to the first order of reception uplink data messages, just is not described in detail here.

Step 202: many LLID ONU receives the uplink data messages of carrying the CLT sign; Obtain the CLT sign; According to the corresponding relation of the CLT sign of self preserving, the uplink data messages that is received is sent in the LLID queue unit corresponding with the CLT sign of being obtained with the LLID queue unit.Before sending, delete the CLT sign in the uplink data messages.

Step 203: each the LLID queue unit among many LLID ONU is ranked after the scheduling to the uplink data messages that is received respectively, according to the order of sequence the uplink data messages of output deletion CLT sign.

So far, this flow process finishes.

In reality, carry the CLT sign in the uplink data messages and can adopt the MAC-IN-MAC mode to realize, add one deck MAC head in all uplink data messages that promptly between ONU and CLT, transmit again, promptly outer MAC head uses the field in the outer MAC head to carry the CLT sign.

Fig. 3 is the uplink data messages sketch map of two-layer MAC head in the embodiment of the invention.As shown in Figure 3, the uplink data messages of this two-layer MAC head comprises lead code (Preamble), the outer MAC head and the uplink data messages content that increase.Wherein, carry former MAC head in the uplink data messages content.Outer MAC head specifically comprises target MAC (Media Access Control) address (DA), source MAC (SA) and optional VLAN label field.Wherein, Target MAC (Media Access Control) address is the MAC Address of ONU; Source MAC is the initial MAC Address that receives the CLT of this uplink data messages; VLAN label field record additional information, this additional information can be a cascaded message, the type that is used to identify this uplink data messages is data message or the data message under the cascade system under the non-cascade system.Wherein, when CLT and ONU were man-to-man the relation, the uplink data messages type was the data message under the non-cascade system; When CLT and ONU were many-to-one the relation, the type of uplink data messages was the data message under the cascade system.Represent that in the VLAN label field under the situation of cascaded message, VLAN value and implication thereof can be as shown in table 1:

The VLAN value	Implication
		2	Business Stream under the non-cascade system
3	Business Stream under the cascade system

Table 1

When employing table 1 illustrated VLAN value and implication thereof, the implementation of above-mentioned steps 201 was: after CLT receives uplink data messages, for the uplink data messages that is received is added outer MAC head as shown in Figure 2.Wherein, the VLAN value is 3.The implementation of above-mentioned steps 202 is: after ONU receives uplink data messages; Judge whether the VLAN value is 3, if judge that then this uplink data messages is from the CLT in the cascade system; This moment, ONU obtained source MAC from outer MAC head; The source MAC of preserving according to self and the corresponding relation of LLID queue unit are confirmed the LLID queue unit of the institute's uplink data messages that receives correspondence the uplink data messages of deleting outer MAC head to be sent to determined LLID queue unit.If the VLAN value in the MAC head is 2; Then ONU judges that this uplink data messages is from the CLT in the non-cascade system; This moment, ONU dialled from outer MAC head, and the mode that adopts existing many LLID ONU to handle uplink data messages is handled the uplink data messages that is received.

In reality, the CLT sign in the message is in order to distinguish the message source, promptly to confirm source CLT, making ONU can uplink data messages be put into corresponding LLID queue unit.In reality; CLT can directly add uplink data messages with LLID; ONU also needn't preserve the corresponding relation of CLT sign and LLID so; But, uplink data messages is sent in the corresponding LLID queue unit rank then scheduling and output simply according to the indication of the LLID in the uplink data messages.During realization, add outer MAC head in all uplink data messages that still can between ONU and CLT, transmit again, utilize the VLAN label field record LLID in the outer MAC head.

The present invention adopts many LLID ONU as the upstream Interface card; Because many LLID ONU has a plurality of LLID formations; Each formation can be regarded a spatial cache as; Adopt many LLID ONU to increase the spatial cache of ONU so, the increase of spatial cache can reduce the data loss rate when transmitting data message.In reality; Data loss rate when further reducing ONU forwarding uplink data message; After ONU receives uplink data messages, and to message its rank transmit before, further the upstream data that is received is buffered in ONU inside or the external memory unit.

For realizing data message forwarding method of the present invention, the invention provides a kind of data message forwarding as shown in Figure 4 system.This system comprises n CLT and the ONU as the upstream Interface card.Wherein, each CLT is used to receive the CLT distinctive mark of using to self configuration, in the uplink data messages that receives through user interface, adds said CLT distinctive mark; The uplink data messages of carrying distinctive mark is sent to said ONU, and n is the integer more than or equal to 1.

ONU supports many LLID, and the uplink data messages of carrying the CLT distinctive mark with receiving forwards through the LLID formation corresponding with the CLT distinctive mark.

As shown in Figure 4, CLT comprises unit and adding device is set; Wherein,

The unit is set, is used to preserve the CLT distinctive mark of user for self disposing; The CLT distinctive mark is LLID, or identifies such as the CLT of MAC Address.

Adding device adds that in the uplink data messages that receives through user interface the CLT distinctive mark that the unit is preserved being set; The uplink data messages of carrying the CLT distinctive mark is sent to ONU.

Particularly, when above-mentioned CLT distinctive mark was CLT self MAC address, adding device added outer MAC head in uplink data messages, the uplink data messages of having added outer MAC head is sent to ONU.Wherein, the uplink data messages of layer two MAC head can adopt the structure shown in Fig. 3.In the present embodiment, whether the VLAN label field record cascaded message in the outer MAC head is used to identify uplink data messages from cascade system.

Background technology has provided n CLT cascade system in a kind of EPCN cascade system, and wherein, CLT1 directly links to each other with ONU through the GE interface, and CLT i links to each other with CLT (i-1), i=2,3 ..., n.CLT i will send to CLT (i-1) through the uplink data messages of the local first order and second level queue scheduling.CLT 1 will send to ONU through the uplink data messages of the local first order and second level queue scheduling.Fig. 4 also shows the concrete structure of adding device under the cascade system shown in Fig. 1.As shown in Figure 4, the adding device among the CLT specifically comprises first order queue scheduling module, adds module and second level queue scheduling module, wherein,

First order queue scheduling module; Be used for before or after the uplink data messages that receives through user interface is carried out the queue scheduling of this CLT; The uplink data messages that is received is sent to the interpolation module; Receive and add the uplink data messages of carrying the CLT distinctive mark that module is returned, the uplink data messages of carrying the CLT distinctive mark is sent to second level queue scheduling module.Can also be earlier before the first order queue scheduling module with the packet buffer that receives in memory cell.

Said interpolation module is used for adding the CLT distinctive mark that the unit preservation is set in the uplink data messages that is received from first order queue scheduling module.

Second level queue scheduling module; To the uplink data messages of carrying the CLT distinctive mark through first order queue scheduling module queue scheduling; With the uplink data messages of sending from the CLT with the direct cascade of place CLT of carrying the CLT distinctive mark, the scheduling of ranking sends to ONU then.CLTn in the corresponding diagram 4, its second level queue scheduling module does not receive other CLT message sent, and directly transparent transmission is received from the uplink data messages of first order queue scheduling module.It is thus clear that CLT n also can not comprise second level queue scheduling module.

Fig. 4 also shows the concrete structure of ONU, and is as shown in Figure 4, and this ONU comprises corresponding unit and a plurality of LLID queue unit, wherein,

Corresponding unit is used to receive from the upstream data newspaper of CLT zhang, confirms the LLID queue unit corresponding with CLT, and the uplink data messages that is received is sent to determined LLID queue unit.

Fig. 5 shows the structural representation of corresponding unit among Fig. 4, and is as shown in Figure 4, and this corresponding unit specifically comprises configuration module and determination module; Wherein, configuration module is used to receive and preserve user configured as the CLT sign of CLT distinctive mark and the corresponding relation of LLID queue unit; Determination module; Be used to receive uplink data messages from CLT; According to obtaining corresponding relation from dispensing unit, confirm with the reception uplink data messages in CLT identify corresponding LLID queue unit, the uplink data messages that is received is sent to determined LLID queue unit.

When CLT is designated the MAC Address of CLT; After determination module receives the uplink data messages of carrying outer MAC head; From outer MAC head, obtain source MAC,, confirm the LLID queue unit corresponding with source MAC according to the corresponding relation of MAC Address of preserving in the said configuration module and LLID queue unit; Uplink data messages with the outer MAC head of deletion sends to determined LLID queue unit.

LLID queue unit among the ONU is used for the uplink data messages that the is received from corresponding unit scheduling of ranking is forwarded then.Specifically how queue scheduling is a prior art, just no longer details here.

In reality, corresponding unit further comprises judge module, is used for when the cascaded message of the uplink data messages ectomesoderm MAC head that is received is shown as cascade, notifies said determination module to carry out said operation of obtaining corresponding relation.When cascaded message was shown as non-cascade, the notice determination module was handled the uplink data messages mode according to many LLID ONU and is carried out existing operation.

In order to reduce the message dropping rate among the ONU, this ONU further comprises memory cell, is used to store the uplink data messages that is received from CLT, and offers corresponding unit.

Can find out that by the above data message forwarding scheme provided by the present invention makes each CLT obtain independently uplink bandwidth resource.

In sum, more than being merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a data message forwarding method is applied to a plurality of coaxial line terminal CLT and utilizes the Ethernet passive coaxial network EPCN system of an optical network unit ONU as the upstream Interface card, it is characterized in that this method comprises:

In the ONU that supports multi-logical link sign LLID, each CLT that will link to each other with this ONU distributes a LLID queue unit;

Said ONU receives the corresponding relation of user configured CLT sign and LLID queue unit; Each CLT adds self CLT sign in the uplink data messages that receives through self user interface, send to ONU; Said ONU receives uplink data messages; Said ONU obtains the CLT sign from the uplink data messages that is received; According to said corresponding relation, confirm and the corresponding LLID queue unit of being obtained of CLT sign, said uplink data messages is forwarded through determined LLID queue unit.

2. the method for claim 1 is characterized in that, said CLT is designated the media access control MAC address of CLT;

3. method as claimed in claim 2 is characterized in that, said outer MAC head further comprises cascaded message;

4. the method for claim 1 is characterized in that, said ONU transmits before the said uplink data messages after receiving said uplink data messages, further the uplink data messages that is received is buffered in ONU inside or external memory unit.

5. optical network unit ONU as the upstream Interface card; It is characterized in that; This ONU comprises corresponding unit and queue unit for corresponding settings of each coaxial line terminal CLT that link to each other with this ONU, and said ONU support multi-logical link identifies LLID, and said queue unit is the LLID queue unit corresponding to each coupled CLT that in many LLID ONU, is provided with; Wherein

Said corresponding unit is used to receive uplink data messages, confirms and the CLT corresponding queues unit, source of said uplink data messages, and said uplink data messages is sent to determined queue unit, and said corresponding unit comprises configuration module and determination module; Wherein,

Said configuration module is used to receive and preserve the corresponding relation of user configured CLT sign and LLID queue unit;

Said determination module; Be used to receive uplink data messages from CLT; According to obtaining corresponding relation from said configuration module, confirm with the reception uplink data messages in CLT identify corresponding LLID queue unit, said uplink data messages is sent to determined LLID queue unit;

6. ONU as claimed in claim 5 is characterized in that, said CLT is designated the media access control MAC address of CLT;

Said determination module is further used for from the outer MAC head of reception uplink data messages, obtaining source MAC; According to said corresponding relation; Confirm the LLID queue unit corresponding, the uplink data messages of deleting said outer MAC head is sent to determined LLID queue unit with source MAC.

7. ONU as claimed in claim 6; It is characterized in that; Said corresponding unit further comprises judging unit; The outer MAC head of the uplink data messages that is used for receiving from determination module obtains cascaded message, when judging that said cascaded message is shown as cascade, notifies said determination module to carry out said operation of obtaining source MAC.

8. ONU as claimed in claim 5 is characterized in that this ONU further comprises memory cell, is used for the uplink data messages that buffer memory is received from CLT, and offers said corresponding unit.

9. a coaxial line terminal CLT adopts optical network unit ONU as the upstream Interface card, and said ONU supports multi-logical link sign LLID; It is characterized in that this CLT comprises unit and adding device are set;

Said adding device is used for adding said CLT distinctive mark in the uplink data messages that receives through user interface, and the uplink data messages of carrying said CLT distinctive mark is sent to said ONU;

Each CLT that links to each other with said ONU is assigned a LLID queue unit; Said ONU can receive the uplink data messages of carrying the CLT sign; Obtain the CLT sign; According to the corresponding relation of the CLT sign of self preserving, the uplink data messages that is received is sent in the LLID queue unit corresponding with the CLT sign of being obtained with the LLID queue unit.

10. CLT as claimed in claim 9 is characterized in that, the media access control MAC address that said CLT distinctive mark is CLT.

Said adding device is further used in said uplink data messages, adds the outer MAC head of source address for the MAC Address of place CLT, and the uplink data messages that will have outer MAC head sends to said ONU.

11. CLT as claimed in claim 9 is characterized in that, said adding device comprises first order queue scheduling module and adds module;

Said first order queue scheduling module; Be used for before or after scheduling that the uplink data messages that receives through user interface is ranked; The uplink data messages that is received is sent to said interpolation module; Receive and add the uplink data messages of carrying the CLT distinctive mark that module is returned, the uplink data messages of carrying the CLT distinctive mark is sent;

Said interpolation module is used for adding the said CLT distinctive mark that the unit provides that is provided with in the uplink data messages that is received from first order queue scheduling module.

12. CLT as claimed in claim 11; It is characterized in that; Said adding device further comprises second level queue scheduling module, is used for through the uplink data messages of carrying the CLT distinctive mark of first order queue scheduling module queue scheduling and the uplink data messages of carrying the CLT distinctive mark sent from the CLT with the direct cascade of place CLT; The scheduling of ranking sends to said ONU then.

13. a data message forwarding system comprises a plurality of coaxial line terminal CLT and the optical network unit ONU as the upstream Interface card, said ONU supports multi-logical link sign LLID, it is characterized in that,

Each CLT that links to each other with said ONU is assigned a LLID queue unit; Said ONU can receive the uplink data messages of carrying the CLT sign; Obtain the CLT sign; The CLT sign of preserving according to self and the corresponding relation of LLID queue unit send to the uplink data messages that is received and identify corresponding LLID queue unit with the CLT that is obtained and forward.