CN101557338A - Method, system and device realizing message transmission in Ethernet passive optical network (EPON) - Google Patents

Abstract

The invention discloses a method, a system and a device realizing message transmission in the Ethernet passive optical network (EPON). The method is as follows: a 10 G optical line terminal (OLT) is additionally arranged in the EPON to be used as a transit station of a 10 G EPON optical network unit (ONU) and a 1G EPON OLT transit station to recognize the up message directly coming from a 10 G EPON ONU, judge whether the up message is the multiple-point control protocol (MPCP) message, and only transmit the MPCP message to a 1G EPON OLT. The system comprises an original EPON OLT, an additionally-arranged 10 G EPON OLT and a 10 G EPON ONU. The device comprises a logic unit, a 10 G EPON OLT transceiver and a 1 G EPON ONU transceiver. The invention can guarantee that no conflict exists in the up direction without additionally arranging a unified scheduling module.

Description

Realize the method, system and device that message is transmitted in the Ethernet passive optical network

Technical field

The present invention relates to optical communication field, relate in particular to the method, system and device that message is transmitted in a kind of realization Ethernet passive optical network (EPON, Ethernet Passive Optical Network).

Background technology

EPON can provide full-service, two-forty Fiber to the home (FTTH, Fiber To The Home) optical access network, it comprises optical line terminal (OLT, Optical Line Terminal), optical network unit (ONU, Optical Network Unit), optical branching device (splitter).

In EPON, OLT is a down direction to the transmission direction of ONU, adopts time division multiplexing (TDM, Time Division Multiplex) mode to transmit, and OLT gives ONU with information broadcast continuously, and each ONU selects one's own Data Receiving.ONU is a up direction to the transmission direction of OLT, adopts time division multiple access (TDMA, Time Division Multiple Access) mode to transmit.

Along with popularizing of network application, various emerging enhancing business have been quickened the demand of bandwidth, and the ieee standard tissue begins to consider the standardization of 10G EPON.IEEE 10G EPON standard definition downstream rate be 10G, therefore upstream rate is 1G and 10G, needs the OLT of 10G EPON to have the burst receiver that can support dual rate.In addition, before 1G EPON is upgraded to 10G EPON fully, can be faced with the problem of 1G EPON and 10G EPON coexistence.

1G EPON and 10G EPON coexistence, mean the coexistence of dual rate in the system, in order to solve the problem of dual rate coexistence, as shown in Figure 1, a newly-increased in the prior art 10G EPON OLT communicating by letter with support and 10G EPON ONU, original 1G EPON ONU continues to communicate by letter with 1G EPON OLT, and 10G EPON OLT and the descending transmission of 1G EPON OLT are by the multiplexing original optical fiber of WDM (wavelength division multiplexing) filter.One skilled in the art will appreciate that OLT need adopt ranging technology and dynamic bandwidth allocation (DBA, Dynamic BandwidthAllocation) technology in order to guarantee that upstream data does not clash.Ranging technology is measured from the descending data-signal loop time delay that sends to up reception of OLT, and carrying out delay compensation in view of the above, the upward signal that guarantees each ONU inserts the time slot of appointment after common optical fiber is converged, neither bump to each other, can the gap too not big yet.Delivery time and the transmitting time of DBA Technical arrangements ONU.But, 1G EPON OLT can only be to finding range from the uplink message of 1GEPON ONU and the DBA technology in the prior art, can not be to finding range from the uplink message of 10G ONU and the DBA technology, and 10G EPON OLT can only be to finding range from the uplink message of 10G EPON ONU and the DBA technology, can not be to finding range from the uplink message of 1G ONU and the DBA technology, thereby when 1G ONU and 10G ONU transmission uplink message, can clash, therefore used a public DBA module that 1G OLT and 10G OLT are coordinated, unified scheduling 1G ONU and 10G ONU guarantee up no conflict.The shortcoming of prior art is: not only increased a 10G OLT newly, also need to increase again a DBA module 1G OLT and 10G OLT are coordinated to guarantee up no conflict, implement not easy, in addition, 1G OLT there is no too big difference among newly-increased 10G OLT logic realization and the EPON, promptly also to carry out ranging technology and DBA technology, logic realization complexity.

Summary of the invention

In view of this, the main purpose of the embodiment of the invention is to provide the method, system and device that message is transmitted among a kind of EPON of realization, to realize that need not to increase unified scheduler module just can guarantee up no conflict again.

A kind of method that realizes that message is transmitted in the Ethernet passive optical network, newly-increased optical line terminal equipment OLT, this method comprises:

A, newly-increased OLT identify directly the message from the optical network unit ONU of upgrading, and wherein, the ONU of described upgrading supports to adopt speed before the upgrading or the speed rates message after the upgrading, and the speed before the upgrading is first rate, and the speed after the upgrading is second speed;

B, judge that whether described message is that message and the speed that sends to original OLT is second speed, if this message rate is converted to the speed of original OLT, and the message after will changing is transmitted to original OLT.

A kind of method that realizes that message is transmitted in the Ethernet passive optical network, this method comprises:

Whether a, judgement are the messages that sends to the ONU of upgrading from the downlink message of original OLT, if enter step b; Otherwise, dropping packets;

B, the message rate that will send to the ONU of upgrading are converted to the speed that the ONU of upgrading is upgraded to, and are transmitted to the ONU of upgrading.

A kind of system that realizes that message is transmitted in the Ethernet passive optical network, this system comprises:

Newly-increased OLT is used to identify directly the message from the ONU of upgrading, judges directly from the message of the ONU of upgrading it whether is that message and the speed that sends to original OLT is the speed that ONU is upgraded to, if be transmitted to original OLT;

Original OLT is used to receive the message that newly-increased OLT transmits;

The ONU of upgrading is used for sending uplink message to newly-increased OLT.

A kind of system that realizes that message is transmitted in the Ethernet passive optical network, this system comprises:

Newly-increased OLT is used to judge whether the downlink message that original OLT sends is the message that sends to the ONU of upgrading, if, the message rate that sends to the ONU of upgrading is converted to the speed that the ONU of upgrading is upgraded to, be transmitted to the ONU of upgrading;

Original OLT is used to send downlink message;

The ONU of upgrading is used to receive speed that newly-increased OLT transmits and is the speed that is upgraded to and from the message of original OLT.

A kind of device of realizing that message is transmitted in the Ethernet passive optical network, this device comprises:

Receive the transceiver unit of upward signal, be used to receive uplink message;

Logical block, be used to identify direct message from the ONU that upgrades, and judge whether it is the message that sends to original OLT, and speed is the speed after the upgrading, if, through the speed conversion of retransmission unit, be converted to and the identical speed of original OLT speed, be transmitted to original OLT through head-end unit;

Retransmission unit is used for the message that sends to original OLT after the forwarding rate conversion.

A kind of device of realizing that message is transmitted in the Ethernet passive optical network, this device comprises:

The WDM filter: be used for sending the downlink message that receives from original OLT to retransmission unit, or the message after the transceiver unit conversion of the ONU of upgrading transmission through receiving uplink message;

Receive the transceiver unit of uplink message: be used for the downlink message after the ONU transmission rate conversion of upgrading from original OLT;

Logical block: be used to judge whether the downlink message that original OLT sends is the message that sends to the ONU of upgrading, if send to the transceiver unit that receives uplink message;

Retransmission unit is used to receive the downlink message that original OLT sends.

As seen, the embodiment of the invention has following beneficial effect: because the 1G EPONONU transceiver of newly-increased 10G OLT is finished speed is 10G and from the rate transition of 10G EPON ONU, be the 10G rate transition 1G speed promptly, be transmitted to original EPON OLT again and then finish ranging technology and DBA technology by the 1G OLT of EPON, do not need to increase again miscellaneous equipment and coordinate just can guarantee up no conflict, therefore implement easy, in addition, because newly-increased 10G OLT terminal as 10G EPON ONU and original EPON OLT, carry out the MPCP message forwarding, do not need to carry out ranging technology and DBA technology, its logic realization is simple.

Description of drawings

Fig. 1 is prior art systems figure;

Fig. 2 is that embodiment one realizes the method flow diagram that uplink message is transmitted;

Fig. 3 is 10G EPON OLT transmits flow chart of data processing figure from the MPCP message to 1G EPON OLT;

Fig. 4 is that embodiment one realizes the method flow diagram that downlink message is transmitted;

Fig. 5 is 10G EPON OLT transmits downlink message flow chart of data processing figure from 1G EPON OLT to 10G EPON ONU;

Fig. 6 is that embodiment two realizes the method flow diagram that uplink message is transmitted;

Fig. 7 is 10G EPON OLT transmits flow chart of data processing figure from the MPCP message to 1G EPON OLT;

Fig. 8 is that embodiment two realizes the method flow diagram that downlink message is transmitted;

Fig. 9 is 10G EPON OLT transmits downlink message flow chart of data processing figure from 1G EPON OLT to 10G EPON ONU;

Figure 10 is connected the system diagram between the port of EPON OLT and optical branching device local side for newly-increased 10G EPON OLT;

Figure 11 is connected another port of optical branching device local side and a system diagram that does not use between the port of terminal for 10G EPON OLT;

Figure 12 is the installation drawing of 1G EPON ONU transceiver and the public WDM filter of 10G EPON OLT transceiver;

Figure 13 respectively has the installation drawing of a WDM filter for 1G EPON ONU transceiver and 10G EPON OLT transceiver.

Embodiment

The embodiment of the invention is a kind of method, system and device of realizing that message is transmitted in the Ethernet passive optical network, in method provided by the invention, newly-increased EPON OLT, as ONU after the upgrading and the terminal between original EPON OLT, for up direction, speed before the ONU upgrading is first rate, and the speed after the upgrading is second speed.Newly-increased OLT identifies three kinds of messages from the message that receives, and only to directly judging from the message of the ONU after the upgrading, judge that whether it be that the message and the speed that need be transmitted to original EPON OLT is second speed, if, this message rate is converted to the speed of original OLT, and is transmitted to original OLT.For down direction, has only a kind of speed after the ONU upgrading, be the speed that ONU is upgraded to, newly-increased EPON OLT judges whether the downlink message from original OLT is the message that sends to the ONU of upgrading, if, the message rate that sends to the ONU of upgrading is converted to the speed that the ONU of upgrading is upgraded to, is transmitted to the ONU of upgrading.

Below in conjunction with accompanying drawing the embodiment of the invention is described in detail.

Embodiment one, and the detailed process flow process of present embodiment is divided into up-downlink direction and describes.

For up direction,, realize that the method that the embodiment of the invention provided comprises referring to Fig. 2:

Step 101: newly-increased OLT identifies direct message from the ONU that upgrades;

Step 102: judge that whether described message is that message and the speed that sends to original OLT is second speed, if this message rate is converted to the speed of original OLT, and the message after will changing directly is transmitted to original OLT.

One skilled in the art will appreciate that because the given time of up direction only allows user's transmission, for fear of the conflict of different user, adopted Multi-point Control Protocol (MPCP, Multi-point controlprotocol), by the MPCP agreement, a plurality of ONU share OLT.In addition, the MPCP agreement starts range finding and DBA technology.So above step 102 described " judging whether to sending to the message of original OLT " is and judges whether the message into MPCP.

Below, in conjunction with an instantiation, the as above specific implementation of method shown in Figure 2 is described in detail.

Referring to Fig. 3, in this instantiation, realize that the method that the embodiment of the invention provided comprises:

Step 201:10G EPON ONU sends uplink message, and splitter carries out shunt with uplink message, sends to 10G EPON OLT again;

The 10G EPON OLT transceiver Rx1310nm port of step 202:10G EPON OLT receives message;

Step 203:MUX logic identification goes out direct message from 10G EPON ONU;

Whether step 204:MUX logic determines is the MPCP message, if, enter step 205, otherwise, handle through normal logic, transmit by the NNI interface;

Whether step 205:MUX logic determines MPCP message rate is 10G, if, enter step 206, otherwise, normally receive by EPON OLT;

Step 206: this message rate is converted to 1G, and the Tx1310nm port of 1G EPON ONU transceiver E-Packets, and EPON OLT receives message.

In above-mentioned instantiation, discern message in the following way:

Because 1310 wave band receiving ports of 10G EPON OLT transceiver support dual rate to receive, the message of receiving from this port has three classes, comprise: directly from the uplink message of 10G ONU, the uplink message of 1G ONU, 10G OLT issues 1G OLT by the 1310nm transmitting terminal of 1G transceiver message, the MUX logic identification goes out above-mentioned three class messages, and only, other two classes message is not dealt with judging from the uplink message of 10G EPON ONU.Concrete recognition methods is as follows:

(1) 10G EPON OLT at first checks the LLID in the preceding top guide of uplink message, if broadcasting LLID, for the MPCP control messages is the situation of Register-Req, according to the domain identifier of the Discovery Information Fields of Register-Req message, can distinguish this message is from 10G EPONONU or from 1G EPON ONU.

Wherein, the Discovery Information Fields of Register-Req message is a 10G EPON standard redetermination, only use in the up transmission of the ONU of 10G EPON, present this ONU is that request is registered with 1G speed or 10G speed is registered to this message field indication.The Discovery Information Fields of Register-Req message is as shown in table 1:

Table 1

Table 64-5-REGISTER_REQ MPCPDU Discovery Information Fields

Bit	Flag Field	Values
			0	ONU is 10G/1G upstream capable	0-ONU is not10G/1G upstream capablee 1-ONU is 10G/1G upstream capable
1	1G registration attempt	0-1G registration attempt is not effected 1-1G registration attempt is effected
			2	10G registration attempt	0-10G registration attempt is not effected 1-10G registration attempt is effected
3-7	reserved	Ignored on reception

As bit 1 be 1 and bit 2 be the last behavior 1G speed of ONU of 0 this 10G EPON of expression, bit 1 be 0 and bit 2 be 1 to represent the last behavior 10G speed of the ONU of this 10G EPON.So just can know that according to bit 1 and bit 2 message that receives is from the 1GEPON ONU of up 1G speed or the 10G EPON ONU of up 10G speed.

(2) if clean culture LLID, then MUX conjunctive search LLID transmits and can judge that message is from EPON ONU or from 10G EPON ONU.Wherein, the LLID of 10G EPON OLT transmits and can give 10G EPON OLT by other interface configuration by EPON OLT, also can set up by resolving up Register-Req message and descending Register message.

For example: resolve ONU MAC Address and ONU type that up Register-Req message can know that this uplink message carries, note the corresponding relation of MAC Address and ONU type and the upstream rate of ONU, transmit thereby set up LLID, as table 2:

Table 2

The ONU MAC Address	The LLID that distributes	The ONU type	The ONU upstream rate
				AA-BB-CC-DD-EE-FF		10GEPON ONU		10G
AA-BB-CC-11-22-33		10GEPON ONU	1G
				AA-00-11-22-33-44		1GEPON ONU	1G

Resolve descending Register message and can know the MAC Address of ONU of current registration and the LLID of distribution, note the corresponding relation of MAC Address, LLID and ONU type, transmit thereby set up LLID, as table 3:

Table 3

The ONU MAC Address	The LLID that distributes	The ONU type	The ONU upstream rate
				AA-BB-CC-DD-EE-FF	0x0001	10GEPON ONU		10G
AA-BB-CC-11-22-33	0x0002	10GEPON ONU							1G
				AA-00-11-22-33-44	0x0003	1GEPON ONU		1G

The LLID that distributes during the MUX conjunctive search LLID of 10G OLT transmits just can judge that message is from 1G EPON ONU or from 10G EPON ONU.

In addition, for clean culture LLID, judge that when transmitting this message is during from 10G EPONONU according to LLID, because 10G EPON OLT is transmitted to the message of EPON OLT and can be received once more by the 10G EPON OLT transceiver of 10G EPON OLT in transmitting the way, so, also needing further to judge is uplink message from 10G EPON ONU, or 10G EPON OLT issues the message of EPON OLT by the 1310nm transmitting terminal of its 1G EPONONU transceiver.For 10G EPON OLT can distinguish this two classes message, the message that 10G EPON OLT is transmitted to 1G OLT for own 1310 transmit ports by 1GEPON ONU transceiver by MUX Logic unit marks, when this message once more by 10G EPON OLT when the receiving terminal of 10G EPON OLT transceiver receives, 10GEPON OLT directly abandons and does not transmit.

For down direction,, realize that the method that the embodiment of the invention provided comprises referring to Fig. 4:

Step 301: original OLT sends downlink message, and newly-increased OLT directly receives this downlink message;

Step 302: judge whether the downlink message from original OLT is the message that sends to the ONU of upgrading, if enter step 303; Otherwise, dropping packets;

Step 303: the message rate that will send to the ONU of upgrading is converted to the speed that the ONU of upgrading is upgraded to, and is transmitted to the ONU of upgrading.

Wherein, it is identical with the instantiation of up direction in the present embodiment " to judge whether the downlink message from original OLT is the message that sends to the ONU of upgrading " in the step 302, promptly judges whether to MPCP message.

Below, in conjunction with an instantiation, the as above specific implementation of the described method of Fig. 4 is described in detail.

Referring to Fig. 5, in this instantiation, realize that the method that the embodiment of the invention provided comprises:

Step 401:EPON OLT sends downlink message;

The 1G EPON ONU transceiver Rx1490nm port of step 402:10G EPON OLT receives downlink message;

Whether step 403:MUX logic determines is the MPCP message, if, enter step 404, otherwise, message is done discard processing;

Step 404: with the 1G rate transition is 10G, and the Tx15xxnm port of 10G EPON OLT transceiver is transmitted this message;

Step 405:splitter carries out shunt to this message, sends to 10G EPON ONU, and 10G EPONONU receives message.

To downlink business message, directly issue 10G EPON ONU by the Tx 15xxnm transmit port of 10G EPON OLT transceiver from the NNI interface.

Embodiment two, present embodiment is identical with the thinking of method embodiment one, difference is that the newly-increased OLT of up direction directly transmits the message that need transmit to original EPON OLT in the present embodiment, but earlier message is sent to splitter, is transmitted to original EPON OLT again; Down direction has also carried out corresponding variation.The detailed process flow process is also described for up-downlink direction.

For up direction,, realize that the method that the embodiment of the invention provided comprises referring to Fig. 6:

Step 501: newly-increased OLT identifies direct message from the ONU that upgrades;

Step 502: judge that whether described message is that message and the speed that sends to original OLT is second speed, if, this message rate is converted to the speed of original OLT, and the message after will changing sends to splitter earlier, be transmitted to original OLT again.

It is identical with embodiment one up direction wherein " to judge whether described message is the message that sends to original OLT ", is and judges whether the message into MPCP.

Below, in conjunction with an instantiation, the as above specific implementation of method shown in Figure 6 is described in detail.

Referring to Fig. 7, in this instantiation, realize that the method that the embodiment of the invention provided comprises:

Step 601:10G EPON ONU sends uplink message, and splitter sends to 10G EPON OLT with uplink message along separate routes;

The 10G EPON OLT transceiver Rx1310nm port of step 602:10G EPON OLT receives message;

Step 603:MUX logic identification goes out direct message from 10G EPON ONU;

Whether step 604:MUX logic determines is the MPCP message, if, enter step 505, otherwise, handle through normal logic, promptly transmit through the NNI interface;

Whether step 605:MUX logic determines MPCP message rate is 10G, if, enter step 506, otherwise, normally receive by EPON OLT;

Step 606: is the rate transition of this message 1G, and the Tx1310nm port of 1G EPON ONU transceiver sends to splitter to message, is transmitted to EPON OLT by splitter again, and EPONOLT receives message.

In above-mentioned example, the identification method of message is identical with method embodiment one, does not repeat them here.

For down direction, as shown in Figure 8, realize that the method that the embodiment of the invention provided comprises:

Step 701: original OLT sends downlink message to splitter, by splitter downlink message is transmitted to newly-increased OLT again, and newly-increased OLT receives downlink message;

Step 702: judge whether the downlink message from original OLT is the message that sends to the ONU of upgrading, if enter step 703; Otherwise, dropping packets;

Step 703: the message rate that will send to the ONU of upgrading is converted to the speed that the ONU of upgrading is upgraded to, and is transmitted to the ONU of upgrading.

Wherein, it is identical with the instantiation of up direction in the present embodiment " to judge whether the downlink message from original OLT is the message that sends to the ONU of upgrading " in the step 702, promptly judges whether to MPCP message.

Below, in conjunction with an instantiation, the as above specific implementation of the described method of Fig. 8 is described in detail.

Referring to Fig. 9, in this instantiation, realize that the method that the embodiment of the invention provided comprises:

Step 801:EPON OLT sends downlink message to splitter, by splitter downlink message is transmitted to 10G EPON OLT again;

The 1G EPON ONU transceiver Rx1490nm port of step 802:10G EPON OLT receives downlink message;

Whether step 803:MUX logic determines is the MPCP message, if, enter step 804, otherwise, message is done discard processing;

Step 804: with the 1G rate transition is 10G, and 10G EPON OLT transceiver Tx15xxnm port is transmitted this message;

Step 805:splitter carries out shunt to this message, sends to 10G EPON ONU; , 10GEPON ONU receives message.

To downlink business message, directly issue 10G EPON ONU by the Tx 15xxnm transmit port of 10G EPON OLT transceiver from the NNI interface.

The up direction of the above embodiment of the invention, the speed that newly-increased 10G EPON OLT sends to original EPON OLT to 10G EPONONU is that the message of 10G is transmitted to original EPON OLT, carry out the unified scheduling of uplink message by original EPON OLT, thereby avoiding increasing a DBA module coordinates original EPON OLT and newly-increased 10G EPON OLT again, in addition, newly-increased 10G EPON OLT has only carried out the transfer of MPCP message, need not realize ranging technology and DBA technology, logic realization is simple.

In the system that the embodiment of the invention provides, comprising:

Newly-increased OLT is used to identify directly the message from the ONU of upgrading, judges directly from the message of the ONU of upgrading it whether is that message and the speed that sends to original OLT is the speed that ONU is upgraded to, if be transmitted to original OLT; Judge perhaps whether the downlink message that original OLT sends is the message that sends to the ONU of upgrading, if be transmitted to the ONU of upgrading;

Original EPON OLT is used to receive the uplink message of newly-increased OLT forwarding and carry out ranging technology and the DBA technology, and ONU and the original ONU that upgrades unified scheduling;

The ONU and the 1G EPON ONU of upgrading are used to send uplink message or receive downlink message;

2 * N splitter is used to converge optical fiber, with light signal be coupled, branch, distribution.

This shows, the embodiment of the invention is dispatched uplink message by original EPON OLT, guarantee that uplink message does not clash, thereby need not increase the DBA module again coordinates original EPON OLT and newly-increased 10G EPON OLT, newly-increased 10G EPON OLT carries out the transfer of MPCP message, and logic realization is simple.Below in conjunction with accompanying drawing system provided by the invention is described in detail.

Embodiment one, in conjunction with instantiation the system that the embodiment of the invention provides is described in detail, as shown in figure 10, the present embodiment system comprises: 110: Ethernet passive optical network optical line terminal (EPONOLT), 111:10G Ethernet passive optical network optical line terminal (10G EPON OLT), 112: Ethernet passive optical network optical network unit (EPON ONU), 113:10G Ethernet passive optical network optical network unit (10G EPON ONU) and 114:2 * N optical branching device (2 * N splitter).

Annexation between the each several part function reaches is as follows: 2 * N splitter local side side is EPON OLT and 10G EPON OLT, 10G EPON OLT is connected between EPON OLT and the 2 * N splitter, be used to receive the uplink message that ONU sends through 2 * N splitter, identify direct message from 10G EPONONU, judge whether it is that speed is the MPCP message of 10G, if, is speed that the rate transition of the MPCP message of 10G is 1G, and be transmitted to EPON OLT, if not, transmit through the NNI interface.

10G EPON OLT also is used to receive the downlink message that sends from EPON OLT, judges whether it is the MPCP message, if, be speed that the rate transition of the MPCP message of 1G is 10G, and be transmitted to 10G EPON ONU, otherwise, message is made discard processing.

It is the MPCP message of 1G that EPON OLT is used to receive the rate transition of transmitting through 10G EPON OLT, and the uplink message that utilizes ranging technology scheduling ONU to send, and utilizes DBA scheduling ONU, and; Perhaps send downlink message to 10G EPON OLT.

10G EPONONU after 2 * N splitter end side distinct interface connects EPON ONU respectively and upgrades is used to send uplink message or receives downlink message.

Embodiment two, in conjunction with instantiation the system that the embodiment of the invention provides is described in detail, as shown in figure 11, the each several part that system comprises is identical with system embodiment one, difference is that EPON OLT directly is connected port of 2 * N splitter local side side, and 10G EPON OLT is connected 2 * N splitter local side another port of side and one of 2 * N splitter end side is not used between the port.10G EPON OLT is used to receive the uplink message through 2 * N splitter that ONU sends, identify direct message from 10G EPONONU, judge whether it is that speed is the MPCP message of 10G, if, is speed that the rate transition of the MPCP message of 10G is 1G, be transmitted to EPON OLT through 2 * N splitter again, if not, transmit through the NNI interface.

10G EPON OLT also is used to receive EPON OLT through the downlink message that 2 * N splitter sends, and judges whether it is the MPCP message, if, is speed that the rate transition of the MPCP message of 1G is 10G, be transmitted to 10G EPON ONU again, otherwise, message is made discard processing.In this instantiation, function and the embodiment of EPON OLT and 2 * N splitter are just the same, do not repeat them here.

The device that the embodiment of the invention provides also is described in conjunction with the accompanying drawings according to method embodiment and system embodiment.

Embodiment one, the system that the method and system embodiment one that provides according to method embodiment one provides, the device that present embodiment adopts as shown in figure 12, this device comprises:

120:10G EPON OLT transceiver;

121:1G EPON ONU transceiver;

The 122:WDM filter;

123：MUX Logic；

124：NNI Data I/O。

10G EPON OLT transceiver comprises: OLT Tx15xxnm, OLT Dual rate Rx 1310nm; 1G EPON ONU transceiver comprises: OLT Rx 1490nm, OLT Tx 1310nm; The shared WDM filter of 10G EPON OLT transceiver and 1G EPON ONU transceiver.

The OLT Dual rate Rx 1310nm port of 10G EPON OLT transceiver is used to receive the uplink message that sends through the ONU of WDM filter, and issue MUX Logic, MUX Logic is used to discern direct message from 10G EPON ONU, and judge whether it is that MPCP message and speed are 10G, if, send to 1G EPON ONU transceiver, receive and send to the WDM filter by Tx 1310nm port, be sent to EPON OLT by the WDM filter, if not the MPCP message, handle through normal logic, transmit by the NNI interface, if MPCP message but speed is 1G is normally received by EPONOLT.

The OLT Rx 1490nm port of 1G EPON ONU transceiver is used for receiving through the WDM filter, the downlink message that EPON OLT sends also is sent to MUX Logic, MUX Logic is used to judge whether to be the MPCP message, if, be forwarded to 10G EPON OLT transceiver, send this message to the WDM filter, send to 10GEPON ONU through 2 * N splitter by the WDM filter by OLT Tx15xxnm port, if not, make discard processing.

If the downlink message that the NNI interface sends is directly issued WDM by the Tx 15xxnm transmit port of 10G EPON OLT transceiver, and then send to 10G EPONONU by 2 * N splitter.

Embodiment two, the system that the method and system embodiment two that provides according to method embodiment two provides, the device that present embodiment adopts as shown in figure 13, this device comprises:

130:10G EPON OLT transceiver;

131:1G EPON ONU transceiver;

132：MUX Logic；

133：NNI Data I/O。

10G EPON OLT transceiver comprises: OLT Tx15xxnm, OLT Dual rate Rx 1310nm, WDM filter; 1G EPON ONU transceiver comprises: OLT Rx 1490nm, OLT Tx 1310nm, WDM filter; Be that with device embodiment one difference 10G EPON OLT transceiver and 1GEPON ONU transceiver respectively have a WDM.

The OLT Dual rate Rx 1310nm port of 10G EPON OLT transceiver is used to receive the filter through the WDM of this transceiver, the uplink message that ONU sends, and issue MUX Logic, MUX Logic is used to discern direct message from 10G EPON ONU, and judge whether it is that MPCP message and speed are 10G, if, send to 1G EPON ONU transceiver, receive and send to the WDM filter of 1G EPON ONU transceiver by Tx 1310nm port, be sent to EPON OLT by WDM, if not the MPCP message, handle through normal logic, transmit by the NNI interface, if MPCP message but speed is 1G is normally received by EPON OLT.

The OLT Rx 1490nm port of 1G EPON ONU transceiver is used for receiving through its WDM filter, the downlink message that EPON OLT sends also is sent to MUX Logic, MUX Logic is used to judge whether to be the MPCP message, if, be forwarded to 10G EPON OLT transceiver, send this message to the WDM filter of 10G EPON OLT transceiver, send to 10G EPON ONU through 2 * N splitter by the WDM filter by OLT Tx15xxnm port, if not, make discard processing.

If the downlink message that the NNI interface sends is directly issued its WDM filter by the Tx 15xxnm transmit port of 10G EPON OLT transceiver, and then send to 10GEPON ONU by 2 * N splitter.

As seen, the important function of 10G EPON OLT is to transmit the MPCP message, by the uplink message unified scheduling of EPON OLT to 1G EPON ONU and 10G EPON ONU transmission, avoid up no conflict, need not to increase again the DBA module EPON OLT and 10G EPON OLT are coordinated, and the logic realization of 10GEPON OLT is simple.

In addition, in various embodiments of the present invention, for the uplink message of 1G EPON ONU transmission and the speed of 10GEPON ONU transmission is the uplink message of 1G, original EPON OLT can correctly receive equally, send to the downlink message of 1G EPON ONU for original EPON OLT, correctly receive by 1G EPON ONU, do not need newly-increased 10G EPON OLT to transmit.

The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (18)

1, a kind of method that realizes that message is transmitted in the Ethernet passive optical network is characterized in that, newly-increased optical line terminal equipment OLT, and this method comprises:

A, newly-increased OLT identify directly the message from the optical network unit ONU of upgrading, and wherein, the ONU of described upgrading adopts speed before the upgrading or the speed rates message after the upgrading, and the speed before the upgrading is first rate, and the speed after the upgrading is second speed;

B, judge that whether described message is that message and the speed that sends to original OLT is second speed, if this message rate is converted to the speed of original OLT, and the message after will changing is transmitted to original OLT.

2, method according to claim 1 is characterized in that, judges among the step B whether described message is that the specific implementation that sends to the message of original OLT is:

Judge whether described message is Multi-point Control Protocol MPCP message.

3, method according to claim 1 is characterized in that, the specific implementation that the message after will changing described in the step B is transmitted to original OLT is:

Message after the described conversion directly is transmitted to original OLT.

4, method according to claim 1 is characterized in that, the message after will changing described in the step B is transmitted to original OLT specific implementation and is:

Message after the described conversion is sent to optical branching device splitter, be transmitted to original OLT again.

5, method according to claim 1, it is characterized in that, described steps A comprises: newly-increased OLT is at the LLID LLID that determines to obtain described message during for broadcasting LLID, and the ONU and the speed that identify from upgrading according to the control information of MPCP message are the messages of second speed.

6, method according to claim 1, it is characterized in that, described steps A comprises: when newly-increased OLT is clean culture LLID at the LLID LLID that determines to obtain described message, transmit the message that identifies from the ONU of upgrading according to LLID, newly-increased OLT is by marking the message that is transmitted to original OLT to oneself, and identification is direct message from the ONU that upgrades, and still newly-increased OLT is transmitted to the message of original OLT, if directly, enter step B from the message of the ONU that upgrades.

7, a kind of method that realizes that message is transmitted in the Ethernet passive optical network is characterized in that this method comprises:

Whether a, judgement are the messages that sends to the ONU of upgrading from the downlink message of original OLT, if enter step b; Otherwise, dropping packets;

B, the message rate that will send to the ONU of upgrading are converted to the speed that the ONU of upgrading is upgraded to, and are transmitted to the ONU of upgrading.

8, method according to claim 7 is characterized in that, judges among the described step a that whether described message is that the specific implementation of message that sends to the ONU of upgrading is:

Judge whether described message is Multi-point Control Protocol MPCP message.

9, method according to claim 7 is characterized in that, the downlink message from original OLT described in the step a is the downlink message that original OLT directly issues newly-increased OLT.

10, method according to claim 7 is characterized in that, the downlink message from original OLT described in the step a is that original OLT sends, and is transmitted to the downlink message of newly-increased OLT through splitter.

11, a kind of system that realizes that message is transmitted in the Ethernet passive optical network is characterized in that this system comprises:

Newly-increased OLT: be used to identify directly message, judge directly from the message of the ONU of upgrading it whether is that message and the speed that sends to original OLT is the speed that ONU is upgraded to, if be transmitted to original OLT from the ONU of upgrading;

Original OLT: be used to receive the message that newly-increased OLT transmits;

The ONU of upgrading: be used for sending uplink message to newly-increased OLT.

12, system according to claim 11 is characterized in that, described newly-increased OLT is used to E-Packet and comprises that newly-increased OLT directly E-Packets to original OLT.

13, system according to claim 11 is characterized in that, this system also comprises splitter, and described newly-increased OLT is used to E-Packet and comprises, splitter is connected between newly-increased OLT and the original OLT, sends the message that newly-increased OLT transmits to original OLT.

14, a kind of system that realizes that message is transmitted in the Ethernet passive optical network is characterized in that this system comprises:

Newly-increased OLT: be used to judge whether the downlink message that original OLT sends is the message that sends to the ONU of upgrading, if, the message rate that sends to the ONU of upgrading is converted to the speed that the ONU of upgrading is upgraded to, be transmitted to the ONU of upgrading;

Original OLT: be used to send downlink message;

The ONU of upgrading: be used to receive the message that newly-increased OLT transmits.

15, system according to claim 14 is characterized in that, described original OLT is used to send downlink message and comprises that original OLT is used for directly sending downlink message to newly-increased OLT.

16, system according to claim 14 is characterized in that, this system also comprises splitter, is connected between newly-increased OLT and the original OLT, is used for sending the downlink message that original OLT sends to newly-increased OLT.

17, a kind of device of realizing that message is transmitted in the Ethernet passive optical network is characterized in that this device comprises:

The WDM filter: be used for sending the uplink message that receives from ONU to the transceiver unit that receives uplink message, or the message after the conversion that original OLT transmission retransmission unit sends;

Receive the transceiver unit of uplink message: be used to receive the uplink message that the WDM filter is transmitted from ONU;

Logical block: be used to identify direct message from the ONU that upgrades, judge whether it is the message that sends to original OLT, and speed is the speed after the upgrading, if, speed conversion through retransmission unit, be converted to and the identical speed of original OLT speed, be transmitted to original OLT through head-end unit;

Retransmission unit: be used for the message after the forwarding rate conversion and send to the WDM filter.

18, a kind of device of realizing that message is transmitted in the Ethernet passive optical network is characterized in that this device comprises:

The WDM filter: be used for sending the downlink message that receives from original OLT to retransmission unit, or the message after the transceiver unit conversion of the ONU of upgrading transmission through receiving uplink message;

Receive the transceiver unit of uplink message: be used for the downlink message after the ONU transmission rate conversion of upgrading from original OLT;

Logical block: be used to judge whether the downlink message that original OLT sends is the message that sends to the ONU of upgrading, if send to the transceiver unit that receives uplink message;

Retransmission unit: be used to receive the downlink message that original OLT sends.

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