KR100484729B1 - System for Traffic Distribution and Control Management Function of Ethernet PON System and the Method - Google Patents

Abstract

The present invention distributes and manages data traffic between OLT and ONU in an Ethernet PON system, thereby eliminating unnecessary traffic loads in a subscriber network and managing traffic distribution and control in an Ethernet PON system capable of providing efficient access and user-friendly services. A system and method thereof are provided.

In the Ethernet PON system according to the present invention, the OLT system checks the traffic type and the destination of the data frame, and the OLT traffic distribution function unit for distributing the traffic to the ONU, and the OLT logic for processing the transmission and reception of the ONU for the PON interval. A link identifier function unit, an OLT OAM function unit that manages network conditions for the OLT and lower ONUs, each ONU comprising an ONU logical link identifier function unit that handles PON interval traffic transmission and reception with a higher OLT, and a data frame. And the ONU traffic distribution function unit for distributing the traffic according to the traffic type and the destination of the network, and the ONU OAM function unit for checking the network state of the subscriber station and notifying the OLT system.

Description

System for Traffic Distribution and Control Management Function of Ethernet PON System and the Method

The present invention relates to a traffic distribution and control management system and method thereof in an Ethernet PON system, and more particularly, to distributed traffic management in an Ethernet PON system by distributing data traffic through an OLT system and a plurality of ONUs. The present invention relates to a traffic distribution and control management system and method in an Ethernet PON system that can remove unnecessary loads, improve data transmission speed, and provide more efficient access and user-friendly services.

The conventional Ethernet passive optical network (PON) system processes all traffic in an OLT system (Optical Line Terminal System) without performing traffic distribution processing.

Such a batch processing method of the OLT system only adds unnecessary traffic load in the PON interval, etc., which causes problems such as causing a decrease in the traffic transmission speed and making it difficult to efficiently manage the subscriber network.

Therefore, it is necessary to control traffic distribution between OLT-ONU systems by using the traffic distribution processing function to be used in the Ethernet PON system.

In other words, in the related art, a traffic control interface implementation method similar to the present invention cannot be applied because the traffic distribution processing control interface is not applied between the OLT system and the optical network unit (ONU).

In addition, in the future, a traffic control interface between the OLT system and the ONU may be applied to distribute traffic between the OLT system and the multiple ONUs in the subscriber network.

In this situation, the Ethernet PON system, which consists of the functional blocks of the OLT system and the functional blocks of the ONU, must have a related signaling procedure between these functional blocks to support the traffic control interface.

Accordingly, the present invention is to solve the above-mentioned problems and necessity, an object of the present invention is to subscribe to the distribution of the traffic in the Ethernet PON system by managing and managing the data traffic between the OLT system and a plurality of ONU, The present invention provides a traffic distribution and control management system and method in an Ethernet PON system that can remove unnecessary traffic loads in a network and provide more efficient access and user-friendly services.

In the Ethernet PON system for achieving the object of the present invention, the traffic distribution and control management system, OLT system for distributing and managing the traffic for the backbone network and ONU, and distributes traffic for the lower number of subscriber stations and higher OLT system Consists of a number of ONUs to manage,

The OLT system includes a service port functional unit that transmits and receives traffic to and from a backbone network; An OLT control function unit for allocating a transmission channel when transmitting and receiving traffic; A logical link identifier DB for storing subscriber and logical link identifier information for each lower ONU; An OLT traffic distribution function unit for identifying a traffic type and a destination for data frames from the backbone network and the lower ONU and distributing the traffic to the ONU and the backbone network; An OLT logical link identifier functional unit for comparing the logical link identifier and transmitting / receiving traffic with the lower ONU through the PON interval; And an OLT OAM function unit that manages the state of the OLT system and all subordinate ONUs.

The ONU includes: a user port functional unit for transmitting and receiving traffic to and from a lower subscriber station; An ONU control function unit for allocating a transmission channel when transmitting and receiving traffic; An ONU logical link identifier function unit for comparing the logical link identifier and transmitting and receiving traffic with the upper OLT system through the PON interval; An ONU subscriber MAC DB storing MAC information of lower subscriber stations; An ONU traffic distribution function unit for identifying a traffic type and a destination for data frames from the subscriber station and the OLT system, and distributing the traffic to the subscriber and the upper OLT system; And an ONU OAM function unit that checks the state of the ONU and the lower subscriber station and notifies the upper OLT OAM function unit.

In addition, the traffic distribution and control management method in the Ethernet PON system for achieving the object of the present invention, in the method for distributing and controlling the external downlink traffic from the backbone network to the subscriber side, the traffic in the OLT traffic distribution functional unit A traffic distribution step of the OLT system that reads the type and the destination to identify the external downlink traffic and distributes the traffic to the ONU; A logical link identification step of the OLT system for the OLT system to tag the logical link identifier for the corresponding ONU and transmit the tag to the PON section; A logical link identification step of the ONU for comparing the logical link identifiers of the data frames received from the PON section in each ONU to determine whether to receive the data frames; And receiving the data frame through logical link identification, the ONU traffic distribution function unit confirms the traffic type and the destination, and transmits the data frame to the corresponding subscriber.

In addition, the traffic distribution and control management method in the Ethernet PON system for achieving the object of the present invention, in the method for distributing and controlling the traffic between other ONU subscribers in the same OLT system, the transmission ONU receiving the data frame from the subscriber A traffic distribution step of the transmitting ONU confirming that the destination of the traffic is for the other ONU subscriber other than itself in the traffic distribution function unit of the distribution unit, and distributing the traffic to the higher OLT system; A logical link identification step of comparing the logical link identifier between the transmitting ONU and the OLT system for transmitting traffic from the transmitting ONU to the OLT system through the PON interval; A traffic distribution step of the OLT system for distributing the traffic to the ONU by identifying the traffic type and the destination in the OLT traffic distribution function unit; A logical link identification step between the OLT system and the receiving ONU which transmits traffic from the OLT system to the corresponding receiving ONU through the PON interval by comparing the logical link identifiers; And a traffic distribution step of the receiving ONU in which the traffic distribution function unit of the receiving ONU identifies the traffic type and the destination, and the subscriber distributes the data frame.

In addition, the traffic distribution and control management method in the Ethernet PON system for achieving the object of the present invention, in the method for distributing and controlling the traffic between the same ONU subscriber, the data received from the subscriber in the traffic distribution function unit of the ONU When the traffic type and the destination of the frame are read to confirm that the traffic is for the lower subscriber, the data frame is distributed to the corresponding subscriber by referring to the ONU subscriber MAC DB without transmitting the traffic to the upper OLT system. It is done.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of an Ethernet PON system to which the present invention is applied.

As shown in FIG. 1, an Ethernet PON system is generally branched into a PON section and a PON splitter 30 with respect to the OLT system 20, and a plurality of ONUs 40 are configured, and each ONU 40 has a plurality of ONUs. The subscriber station 50 is connected to form a subscriber network (10).

In addition, the OLT system 20 is connected to a backbone network such as an IP network, a video network, an ATM network, a voice / data TDM, and the like, and monitors the traffic of the subscriber network 10 and the state of the network through a Q3 interface. The management system is configured.

The PON splitter 30 is an apparatus for interconnecting the OLT system 20 and the plurality of ONUs 40 in a PON interval, and may be connected in a point-to-point or point-to-multipoint method.

Each ONU 40 and its subordinate subscriber stations 50 may be interconnected via Ethernet, VDSL, or the like.

In such an Ethernet PON system, in the distribution management of traffic transmitted from the backbone network to the subscriber side, traffic transmitted from the subscriber to the backbone network, and traffic between subscribers in the same ONU 40 or another ONU 40, Instead of processing all the traffic in the OLT system 20 collectively as in the related art, the OLT system 20 and the ONU 40 are distributed according to the traffic type and the traffic path. In particular, when transmitting traffic between subscribers in the same ONU (40), the present invention does not transmit the traffic to the upper OLT, but by processing itself in the ONU (40) to transmit to the subscriber, unnecessary traffic in the PON interval It can remove the load and improve the traffic transmission speed.

In addition, each ONU 40 checks and manages the status of the subscriber station and the track under its own, and reports this information to the upper OLT system 20 to allow the OLT system 20 to manage the overall system traffic. By doing so, it is possible to efficiently manage the state of the subscriber network.

The OLT system 20 also maintains all initial provisioning information for the pre-boot traffic distribution processing control interface of the PON system.

In addition, the present invention is activated to the traffic distribution processing control system through a detailed control process related to provisioning and start-up in the Ethernet PON system consisting of OLT system 20 having a plurality of functional blocks and a plurality of ONU (40) I want to solve the method.

2 is a block diagram of the OLT system 20 and the ONU 40 composed of a plurality of functional units.

In FIG. 2, only the functional units of the OLT system 20 and the functional units of the ONU 40 are presented for convenience.

As shown in FIG. 2, the OLT system 20 includes a service port function unit 21, a control function unit 22, an OLT traffic distribution function unit 23, a logical link identifier DB 24, and an OLT logic. It comprises a linkage identifier function unit 25, an OLT Operations, Administration and Maintenance (OAM) function unit 26, and an OLT management DB.

The service port functional unit 21 is a functional unit that handles traffic transmission and reception with a backbone network, and the control function unit 22 controls a transmission / reception of traffic in the OLT system 20 and allocation of a transport channel. to be.

The OLT traffic distribution function unit 23 identifies the traffic type (broadcast, unicast, multicast, etc.) and destination subscriber for the traffic received from the external backbone network or the internal ONU 40, and With reference to the logical link identifier DB 24, it is determined to which ONU 40 the traffic should be transmitted. For this purpose, the subscriber information belonging to the OUN must be managed for each ONU in the logical link identifier DB 24. This logical link identifier DB 24 is updated and managed from time to time by the OLT OAM function unit 26 for accuracy of data.

When the OLT logical link identifier function unit 25 receives a data frame from the ONU 40 through the PON interval, the OLT logical link identifier function unit 25 reads the logical link identifier of the frame header to determine the frame from which ONU, and determines the PON interval. In the case of transmitting a data frame to the ONU 40 through the OLT traffic distribution function unit, the logical link identifier for the OUN to which the destination subscriber is identified is transmitted.

The logical link identifier indicates transport channel characteristic information of the data traffic, and the OLT system 20 and each ONU 40 confirm this identifier when transmitting and receiving traffic through the PON period. That is, the logical link identifier information is used to transmit and receive traffic in the PON section between the OLT system 20 and the ONU 40.

In addition, the OLT OAM function unit 26 is a function unit for managing the network state and performance of the system as a whole, and after receiving the management information to the OAM function units of each of the lower ONU (40) OLT management DB To store and provide this information to the management system.

On the other hand, each ONU 40 includes an ONU logical link identifier function unit 45, an ONU traffic distribution function unit 43, a control function unit 42, a user port function unit 41, and an ONU subscriber MAC DB 44. , ONU OAM function unit 46 and ONU management DB is configured.

The user port function unit 41 is a function unit that handles traffic transmission and reception between the subscriber station 50 and the ONU 40, and the control function unit 42 performs traffic transmission and reception of the ONU 40, transmission channel assignment, and the like. It is a functional unit to control.

The ONU logical link identifier function unit 45 is a functional unit for processing the traffic transmission and reception of the PON interval with the upper OLT system 20. When the traffic is transmitted in the PON interval, the ONU logical link identifier function unit 45 When tagging and transmitting a logical link identifier, and receiving the traffic from the PON interval, the logical link identifier of the traffic header is compared to determine whether to receive the link.

 That is, the data frame is received only when the identifier of the traffic transmitted from the upper OLT system 20 through the PON interval is the broadcast identifier that all ONUs 40 should receive or matches the identifier of its own. Discard the frame.

The ONU traffic distribution function unit 43 checks the traffic type and the destination for the data frame from the upper OLT system 20 or the lower subscriber station 50 and distributes the traffic to the upper OLT or the corresponding subscriber. Unit. Where to distribute the traffic is performed by comparing the destination and the ONU subscriber MAC DB 44. That is, if the destination is determined to be its subordinate subscriber through the ONU subscriber MAC DB 44, the traffic is distributed to the corresponding subscriber side, and the traffic is distributed to the upper OLT system 20 if it is not its subordinate subscriber.

To this end, the ONU subscriber MAC DB 44 stores MAC information and MAC addresses of subscribers currently connected to the lower layer. This ONU subscriber MAC DB 44 is updated and managed from time to time by the ONU OAM function unit 46.

The ONU OAM function unit 46 is a functional unit that manages the network state and performance of the lower subscriber station 50, checks the state of the lower subscriber station 50, stores it in the ONU management DB, and stores this information. To the OLT OAM functional unit 26.

Hereinafter, a description will be given of the traffic management process of the overall Ethernet PON system through the OLT OAM function unit 26 and the ONU OAM function unit 46.

First, the ONU OAM function unit 46 receives a management database synchronization request from the OLT OAM function unit 26 to perform synchronization, and the OLT OAM function unit 26 generates a start request with an internal implementation dependency. Let's do it.

Accordingly, the ONU OAM function unit 46 completes an ONU system related initialization state and requests the OLT OAM function unit 26 to start provisioning for the associated interface.

The OLT OAM function unit 26 collects link identifier data synchronization values from the ONU OAM function unit 46 and compares them with a copy of the OLT system 20 to check for a match.

At this time, if the link identifier data synchronization value and the copy of the OLT system 20 coincide, the link identifier data synchronization value of the ONU 40 is only periodically checked without updating the link identifier data synchronization value.

If the compared link identifier data synchronization values do not match, the OLT OAM function unit 26 requests the ONU OAM function unit 46 to upload the ONU link identifier data, and the ONU OAM function unit 46 The OLT OAM function unit 26 is notified of the ONU link identifier data upload result.

When the OLT OAM function unit 26 requests the ONU OAM function unit 46 to start a corresponding interface for establishing an external downcast traffic connection, the ONU OAM function unit 46 accordingly sends an external downcast. The OLT OAM functional unit 26 is notified of the result after starting the corresponding interface for the traffic connection establishment.

If the OLT OAM function unit 26 requests the ONU OAM function unit 46 to start up the corresponding interface for establishing an external downlink multicast traffic connection, the ONU OAM function unit 46 accordingly causes the external downlink multicast. The OLT OAM functional unit 26 is notified of the result after starting the corresponding interface for the traffic connection establishment.

When the OLT OAM function unit 26 requests the ONU OAM function unit 46 to start up the corresponding interface for the internal downlink unicast traffic connection establishment, the ONU OAM function unit 46 establishes the internal downlink unicast traffic connection. Start the corresponding interface for and notify the result.

In addition, when the OLT OAM function unit 26 requests to start the corresponding interface for connection establishment whether the destination logical link identifier of the internal downlink unicast traffic matches, the ONU OAM function unit 46 performs the processing accordingly. Notify and report the result.

When the OLT OAM function unit 26 requests the ONU OAM function unit 46 to start up a corresponding interface for connection establishment that matches the subscriber traffic of internal downlink unicast, the ONU OAM function unit 46 The OLT OAM functional unit 26 is notified of the result after starting the corresponding interface for connection establishment that matches the subscriber traffic of internal downlink unicast.

Through the request and notification process as described above, the OLT OAM function unit 26 grasps network status and performance of the entire system and transmits this information to the management system, thereby allowing an administrator to monitor the status of the subscriber network 10. To be able.

Meanwhile, data traffic in the Ethernet PON system includes external downlink traffic transmitted from the backbone network to the subscriber, upstream traffic transmitted from the subscriber to the external backbone network, and traffic between other ONUs 40 in the same OLT system 20 (OLT). Internal traffic), and traffic between subscribers in the same ONU 40 (internal traffic of OUN).

In the following, the traffic distribution and control method in the Ethernet PON system according to the present invention will be described by dividing by such division.

3A is a flowchart illustrating a distribution process for external downlink traffic transmitted from a backbone network to a subscriber side.

As shown in FIG. 3A, when a data frame is introduced from the backbone network (S301), the OLT system 20 reads the header from the OLT traffic distribution function unit 23 to confirm the type and destination of the traffic. (S302)

At this time, if the traffic is broadcast traffic, the OLT system 20 sets the broadcast traffic mode to be delivered to all ONUs 40 (S303). That is, the OLT logical link identifier function unit 25 Logical link identifiers (hereinafter, referred to as broadcast identifiers) according to the broadcast mode are tagged to the data frames and transmitted in the PON section (S304).

Accordingly, the ONU logical link identifier function unit 45 of all ONUs 40 confirms that the identifiers of the frames are broadcast identifiers and receives the data frames (S305).

Then, the ONU traffic distribution function unit 43 confirms that the traffic type is broadcast traffic and distributes the data frame to all subscribers below (S306).

On the other hand, if the type of the external traffic identified in step S302 is unicast (or multicast) traffic, the OLT system 20 in a point-to-point mode to be delivered to a specific ONU (40) Set to process unicast (or multicast) traffic (S307). That is, the OLT traffic distribution function unit 23 belongs to a destination subscriber for unicast (or multicast) traffic from the logical link identifier DB 24. The ONU 40 is checked, and the OLT logical link identification unit tags the identified identifier of the ONU in a data frame and transmits the ID to the PON section (S308).

Accordingly, the logical link identifier function unit 45 of each ONU 40 determines whether the logical link identifier of the data frame received in the PON section matches its identifier (S309).

At this time, the ONU 40 that does not match the logical link identifier discards the data frame (S310), and the matching ONU 40 examines the frame header in the traffic distribution function unit 43 to check the traffic type and the destination subscriber. After confirming, (S311) referring to the ONU subscriber MAC DB 44, the data frame is transmitted to the subscriber whose MAC address matches the destination subscriber through the user port function unit 41 (S312).

Meanwhile, a process for uplink traffic transmitted from the subscriber to the external backbone network is described in FIG. 3B.

In FIG. 3B, when a data frame is received from the subscriber via the user port function unit 41 (S321), the ONU 40 indicates that the traffic is the upstream traffic to be transmitted to the external backbone network in the ONU traffic distribution function unit 43. The ONU logical link identifier function unit 45 tags the logical link identifier of the upper OLT system 20 and transmits the frame to the PON section (S323).

Accordingly, the upper OLT system 20 receives the data frame from the PNO interval through the OLT logical link identifier function unit 25 (S324), and then the traffic is transmitted from the OLT traffic distribution function unit 23 to the external backbone network. In step S325, data frames are transmitted to the corresponding backbone network through the service port function unit 21 (S326).

Meanwhile, FIG. 3C is a flowchart illustrating a process of processing traffic between subscribers of another ONU 40 in the same OLT system 20.

The process of processing traffic between different ONU 40 subscribers in the same OLT system 20 is as follows.

As shown in FIG. 3C, when a data frame is received from the subscriber via the user port function unit 41 (S331), the ONU traffic distribution function unit 43 confirms the traffic type and the destination (S332). With reference to the ONU subscriber MAC DB 44, it is determined whether the destination is its subordinate subscriber (S333).

In this case, when the destination subscriber is his subordinate subscriber, the destination subscriber will be described with reference to FIG. 3D as a process of processing traffic between subscribers in the same ONU 40.

If the destination is a subscriber of another ONU that is not its subordinate subscriber, the ONU traffic distribution function unit 43 distributes the traffic to the higher OLT system, and the ONU logical link identifier function unit 45 is the higher OLT system 20. The identifier of the tag is transmitted to the PON section (S334).

Accordingly, the OLT system 20 receives the data frame from the PON section through the OLT logical link identifier function unit 25, and then confirms the traffic type and the destination in the OLT traffic distribution function unit 23. S335)

 At this time, if the data frame is unicast (or multicast) traffic, or broadcast traffic for all subscribers of a particular ONU 40, the OLT system 20 is P2P to transmit data to a specific ONU 40 Set to mode to handle unicast (or multicast) traffic, or broadcast traffic for a particular ONU 40 (S336).

That is, the OLT traffic distribution function unit 23 refers to the logical link identifier DB 24 to determine which ONU 40 the destination belongs to, and distributes traffic only to the ONU 40, and the OLT logical link The identifier function unit 25 tags the logical link identifier of the ONU 40 in the data frame and transmits it to the PON section (S337).

Accordingly, the logical link identifier function unit 45 of each ONU 40 determines whether the logical link identifier tagged in the frame matches its logical link identifier (S338).

The ONU 40 whose logical link identifiers do not match discards the data frame (S339). The ONU 40 whose logical link identifiers match matches the traffic type and destination MAC of the data frame in the traffic distribution function unit 43. Check (S340).

At this time, if the traffic frame is unicast (or multicast) traffic, the ONU traffic distribution function unit 43 needs to search the ONU subscriber MAC DB 44 to deliver the traffic to a particular subscriber.

On the other hand, each ONU 40 checks the subscriber MAC information synchronization through the ONU OAM function unit 46, and frequently checks whether the MAC table of the ONU subscriber MAC DB 44 matches the subscriber's MAC information, and checks the MAC information. If not, the ONU OAM function unit 46 updates the ONU MAC table to synchronize subscriber MAC information.

In this way, while the MAC table of the ONU and the MAC information of the subscriber are synchronized, the ONU traffic distribution function unit 43 refers to the MAC table of the ONU to check which subscriber MAC matches the destination MAC of the traffic. If the subscriber that matches the destination MAC is identified, unicast (or multicast) traffic is transmitted to the subscriber via the user port function unit 41 (S341).

Further, in step S340, if the data frame is broadcast traffic for a specific ONU, the traffic distribution function unit 43 of the specific ONU 40 transmits the received broadcast traffic to all of its lower subscribers. (S342)

On the other hand, in the step S335, if the traffic received by the OLT system 20 is broadcast traffic for the lower subscribers of all ONU (40), the OLT sub-system can be broadcast to all the lower ONU (40) Set to the cast traffic mode to process (S343). That is, the OLT logical link identifier function unit 25 tags the broadcast identifier in the data frame and transmits it to the PON section. (S344)

As the broadcast identifier is tagged in the data frame from the PON interval, all ONUs 40 receive the data frame (S345), and the traffic distribution function unit 43 of all the ONUs is via the user port function unit 41. The data frame is transmitted to all lower subscribers (S346).

Meanwhile, FIG. 3D is a flowchart illustrating a process of processing traffic between subscribers in the same ONU 40.

In FIG. 3D, when a data frame from the subscriber is received through the user port function unit 41 (S351), the ONU traffic distribution function unit 43 checks the frame information to confirm the traffic type and the destination subscriber MAC. (S352) It is determined that the traffic is for its subordinate subscribers (S353).

At this time, if the traffic type is broadcast traffic, the ONU traffic distribution function unit 43 transmits the broadcast traffic to all subscribers below it (S354).

In the case of unicast (or multicast) traffic, the ONU traffic distribution function unit 43 refers to the ONU subscriber MAC DB 44 to confirm which subscriber's MAC matches the identified destination subscriber MAC, and then ( S355) The data frame is transmitted through the user port function unit 41 only to the subscriber who matches the identified destination MAC. (S356)

Hereinafter, a method of starting and managing an Ethernet PON system according to the present invention will be described.

On the other hand, Figure 4 is a flow chart related to the operation block of the ONU for the functional block of the OLT system 20 in the Ethernet PON system according to the present invention.

As shown in FIG. 4, upon receiving the start request message from the OLT OAM function unit 26, the ONU OAM function unit 46 performs an initialization operation for the entire ONU system and transmits a provision start signal. )

The ONU OAM function unit 46 checks whether there is ONU MIB (Management Information Base) data in the ONU management DB (S402). If there is no MIB data, the ONU OAM function unit 46 generates an ONU data management object. (S404)

If there is MIB data, the OLT OAM function unit 26 sets the ONU management control channel using the OAM message. (S403)

Thereafter, when the OLT OAM function unit 26 transmits the ONU MIB data initialization request signal (S405), the ONU OAM function unit 46 receives this to remove the ONU MIB data, generates new ONU MIB data, and then The resulting signal (new ONU MIB information) is transmitted to the OLT OAM function unit 26 through the management control channel (S406).

Accordingly, the OLT OAM functional unit 26 updates the OLT MIB data of the OLT management DB (S407).

In addition, the ONU OAM function unit 46 checks whether there is a characteristic value change (S408).

At this time, if there is any change in the characteristics of the ONU managed object, the ONU 40 first compares the characteristics of the ONU managed object in the memory (S409), and if so, updates the ONU managed object characteristic in the memory (S410).

If the ONU MIB data has not changed, a priority queue is generated as much as the line card (S411), and the characteristic is updated according to the data in the memory (S412).

As described above, the traffic distribution and control management system and method in the Ethernet PON system according to the present invention, by efficiently distributed control / management of data traffic in the OLT and ONU using the traffic distribution management function in the Ethernet PON system, The inefficiency of subscriber traffic between the OLT and ONU systems prevents unnecessary traffic loads on the subscriber network and provides more efficient access and user-friendly services.

In addition, by managing each traffic and managing control channel message transmission and reception, traffic distribution processing can be performed, and inefficient traffic between the OLT system and multiple ONUs can be reduced, thereby maximizing network efficiency and convenience.

What has been described above is only one embodiment for implementing the traffic distribution and control management system and method in the Ethernet PON system according to the present invention, the present invention is not limited to the above-described embodiment, the following claims Without departing from the gist of the present invention claimed in the scope, anyone of ordinary skill in the art will have the technical spirit of the present invention to the extent that various modifications can be made.

1 is a schematic block diagram of a general Ethernet PON system.

2 is a block diagram of an OLT system and an ONU with multiple functional units in accordance with the present invention.

3 is a flowchart illustrating a traffic distribution process in an OLT system and an ONU according to the present invention;

3a is a processing flow diagram for external downlink traffic;

3b is a processing flow diagram for upstream traffic;

3c is a flowchart for processing traffic between other ONU subscribers in the same OLT system;

3D is a flow chart for inter-subscriber traffic processing within the same ONU.

4 is a flowchart illustrating a control management process of an OLT and ONU system according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: subscriber network 20: OLT system

23: OLT traffic distribution function unit

24: logical link identifier DB

25: OLT logical link identifier function unit

26: OLT OAM Function Unit

30: PON spliter 40: ONU

43: ONU traffic distribution function unit

44: ONU subscriber MAC DB

45: ONU logical link identifier function unit

46: ONU OAM function unit

50: subscriber station

Claims (20)

OLT system for distributing and managing traffic for the backbone network and ONU, and a plurality of ONUs for distributing and managing traffic for lower subscriber stations and higher OLT systems. The OLT system, A service port functional unit for transmitting and receiving traffic to and from the backbone network; An OLT control function unit for allocating a transmission channel when transmitting and receiving traffic; A logical link identifier DB for storing subscriber and logical link identifier information for each lower ONU; An OLT traffic distribution function unit for identifying a traffic type and a destination for data frames from the backbone network and the lower ONU and distributing the traffic to the ONU and the backbone network; An OLT logical link identifier functional unit for comparing the logical link identifier and transmitting / receiving traffic with the lower ONU through the PON interval; And Consists of OLT OAM function unit that manages the state of OLT system and all subordinate ONUs, The ONU, A user port functional unit for transmitting and receiving traffic to and from a lower subscriber station; An ONU control function unit for allocating a transmission channel when transmitting and receiving traffic; An ONU logical link identifier function unit for comparing the logical link identifier and transmitting and receiving traffic with the upper OLT system through the PON interval; An ONU subscriber MAC DB storing MAC information of lower subscriber stations; An ONU traffic distribution function unit for identifying a traffic type and a destination for data frames from the subscriber station and the OLT system, and distributing the traffic to the subscriber and the upper OLT system; And Traffic distribution and control management system in the Ethernet PON system, characterized in that consisting of the ONU OAM function unit to check the status of the ONU and the lower subscriber station to notify the upper OLT OAM function unit. The OLT traffic distribution function unit according to claim 1, wherein the OLT traffic distribution function unit distributes the received data frame to all lower ONUs when the broadcast traffic is for all lower ONUs. Traffic distribution and control management system in the Ethernet PON system, characterized in that the tag is transmitted to the PON interval by tagging the cast identifier. According to claim 1, wherein the OLT traffic distribution function unit, if the traffic received in the OLT system is unicast traffic or multicast traffic or broadcast traffic for a specific ONU, through the logical link identifier DB to the destination for the destination; Identifying and distributing traffic, and transmitting the OLT logical link identifier function unit to the PON section by tagging the identifier of the specific ONU in a frame header. The Ethernet PON system of claim 1, wherein the OLT OAM function unit requests and receives a logical link identifier data synchronization value from each ONU OAM function unit, and updates and manages the logical link identifier DB through the ONU OAM function units. Traffic distribution and control management system. The OLT OAM function unit according to claim 1, wherein the OLT OAM function unit requests each ONU OAM function unit to start a corresponding interface for connection setting of each traffic mode according to the traffic type and is notified of the start result, and based on the OLT management data Traffic distribution and control management system in the Ethernet PON system, characterized in that for renewal management. The logical unit of claim 1, wherein the ONU logical link identifier function unit receives the data frame if the identifier of the traffic received from the PON interval is the broadcast identifier or matches the logical link identifier thereof, and otherwise, the data. Traffic distribution and control management system in an Ethernet PON system, characterized by discarding frames. The method of claim 1, wherein the ONU traffic distribution function unit, if the traffic transmitted from the subscriber station to the ONU is traffic between the subscribers in the same ONU, the data unit does not transmit the data frame to the upper OLT system according to the traffic type and destination. Traffic distribution and control management system in the Ethernet PON system, characterized in that distributed to the corresponding subscribers of the lower. The method according to claim 1, wherein the ONU OAM function unit checks whether the MAC table of the ONU subscriber MAC DB and the subscriber MAC information match, and if the MAC information does not match, updates the ONU MAC table to synchronize the subscriber MAC information. Distribution and control management system in Ethernet PON system. The method according to claim 1, wherein the ONU OAM function unit checks whether there is ONU MIB data in the ONU management DB, creates an ONU data management object if there is no MIB data, and if there is MIB data, the OLT OAM function unit sends an OAM message. Traffic distribution and control management system in the Ethernet PON system, characterized in that for setting the ONU management control channel by using. The control channel according to claim 1, wherein the ONU OAM function unit removes ONU MIB data and generates new ONU MIB data as the OLT OAM function unit requests initialization of ONU MIB data, and then manages the result signal. Transmitting to the OLT OAM function unit through the OLT OAM function unit, the traffic distribution and control management system in the Ethernet PON system, characterized in that for updating the OLT MIB data of the OLT management DB based on this. 2. The ONU OAM functional object of claim 1, wherein the ONU OAM function unit checks whether the characteristic value is changed, compares whether the ONU managed object characteristic is changed in the memory if there is a change in the characteristic of the ONU managed object, and if the property is changed. And a priority queue as much as a line card if the ONU MIB data has not changed, and updates its characteristics in accordance with the data in memory. A method for distributing and controlling external downlink traffic from a backbone network to a subscriber side, A traffic distribution step of the OLT system for identifying the traffic type and the destination from the OLT traffic distribution function unit to determine the external downlink traffic and distributing the traffic to the ONU; A logical link identification step of the OLT system for the OLT system to tag the logical link identifier for the corresponding ONU and transmit the tag to the PON section; A logical link identification step of the ONU for comparing the logical link identifiers of the data frames received from the PON section in each ONU to determine whether to receive the data frames; And In the Ethernet PON system, when the data frame is received through the logical link identification, the ONU traffic distribution function unit checks the traffic type and the destination and transmits the data frame to the subscriber. How to manage traffic distribution and control. 13. The method of claim 12, wherein if the data frame from the backbone network is broadcast traffic, the traffic distribution step of the OLT system distributes the traffic to all lower ONUs, and the logical link identification step of the OLT system includes the frame header. Traffic distribution and control management method in an Ethernet PON system characterized in that the tagging the broadcast identifier and transmits to the PON interval. The method of claim 12, wherein if the data frame from the backbone network is unicast or multicast traffic, The traffic distribution step of the OLT system identifies the specific ONU for the destination through the logical link identifier DB and distributes the traffic. The logical link identification step of the OLT system transmits the tag to the PON section by tagging the identifier of the specific ONU. , In the ONU traffic distribution step, the traffic distribution and control management in the Ethernet PON system characterized in that the traffic distribution function unit of the specific ONU refers to the ONU subscriber MAC DB and transmits the data frame to the subscriber whose MAC address matches the destination. Way. In the method for distributing and controlling traffic between other ONU subscribers in the same OLT system, A traffic distributing step of the transmitting ONU in which the traffic distributing function unit of the transmitting ONU that has received the data frame from the subscriber confirms that the destination of the traffic is to another ONU subscriber and not to itself, and distributes the traffic to the higher OLT system; A logical link identification step of comparing the logical link identifier between the transmitting ONU and the OLT system for transmitting traffic from the transmitting ONU to the OLT system through the PON interval; A traffic distribution step of the OLT system for distributing the traffic to the ONU by identifying the traffic type and the destination in the OLT traffic distribution function unit; A logical link identification step between the OLT system and the receiving ONU which transmits traffic from the OLT system to the corresponding receiving ONU through the PON interval by comparing the logical link identifiers; And A traffic distribution and control management method in an Ethernet PON system, characterized in that the traffic distribution function unit of the receiving ONU confirms the traffic type and the destination, and the subscriber distributes data frames of the receiving ONU. 16. The method of claim 15, wherein if the data frame is broadcast traffic for subscribers of all ONUs, the traffic distributing step of the OLT system distributes traffic to all lower ONUs and identifies a logical link between the OLT system and a receiving ONU. The tagging and transmitting the broadcast identifier in the frame header in the OLT system, and all the ONU receives the data frame from the PON interval, traffic distribution and control management method in Ethernet PON system. 16. The method of claim 15, wherein if the data frame is unicast traffic, multicast traffic, or broadcast traffic for a particular ONU, then the traffic distribution step of the OLT system specifies a destination for that traffic via a logical link identifier DB. Identifying the ONU and distributing traffic, and identifying the logical link between the OLT system and the receiving ONU through the identification of the logical link identifier as the OLT system tag the identifier of the specific ONU in the frame header and transmits to the PON interval A method for managing traffic distribution and control in an Ethernet PON system, wherein only the specific ONU receives data frames. In the method for distributing and controlling traffic between the same ONU subscriber, When the traffic distribution function unit of the ONU reads the traffic type and the destination of the data frame received from the subscriber, and confirms that the traffic is for its subordinate subscribers, the ONU subscriber MAC DB is referred to without transmitting the traffic to the upper OLT system. A method for managing traffic distribution and control in an Ethernet PON system, characterized by distributing and transmitting the data frame to a corresponding subscriber. 19. The method of claim 18, wherein if the traffic from the subscriber is broadcast traffic, the traffic distribution function unit of the ONU transmits the data frame to all its subordinate subscribers. . 19. The method of claim 18, wherein if the traffic from the subscriber is unicast or multicast traffic, the ONU's traffic distribution function unit transmits the data frame only to a subscriber whose MAC information matches the destination subscriber by referring to the ONU subscriber MAC DB. Traffic distribution and control management method in an Ethernet PON system, characterized in that.