JP2001160843A - Access network remote control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems of a conventional access network remote control system that causes disabled communication with an OLT, wrong delivery in communication of other user and imposes a load on the OLT because of erroneous system setting or path setting when power is applied again to an ONU/ ONT. SOLUTION: The ONU/ONT 101-10n update an LSMI value denoting a command finally stored when storing new instance information and use an attribute value change message to inform the OLT 131 about the LSMI value at a proper time. Even on the occurrence of information mismatch due to power interruption before storage processing of data by the newest command is completed, the OLT 131 requests an MIB data sink value from the ONU/ONT 101-10n at application of power to detect mismatching of information between the OLT and the ONT. Furthermore, in this case, the OLT 131 allows the ONU/ONT 101-10n to transmit again the setting information after the message specified by the LSMI value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an access network remote control system, and more particularly, to an access network remote control system between devices having a master / slave configuration.

[0002]

2. Description of the Related Art OMCI (ONT Management and Control)
Interface) remote control on the interface has a communication function and an optical line terminal (O
LT: Optical Line Terminal and Optical Network Terminal (ON)
T: Optical Network Terminal), a synchronization management method is used in which a mismatch of management information is detected, and after the mismatch is detected, the OLT retransmits the management information again to match the information. Such a synchronization management method is generally provided as a part of a protocol processing function applied according to a property required by an application system.

In recent years, especially in an access network composed of an OLT and an optical network unit (ONU: Optical Network Unit) or ONT (hereinafter, these are referred to as ONU / ONT) connected to the OLT, the OLT and the ONU / O
An OMCI interface is defined as an interface between the NTs, and the management instance is managed and controlled using an OMCI interface protocol that is defined on the OMCI interface.

At the time of management and control of the management instance, (1) a mismatch of instance information recognized between the two devices is detected, and (2) after the mismatch is detected, the instance information is retransmitted from the OLT again. It is required to have a synchronization processing method for matching information as a function of the OMCI interface protocol.

In the access network, the number of ONTs managed by one OLT is large, and the subscriber may turn off / on the power as a usage form. However, the OLT gives setting information every time the ONT is started up. The thing is that the load on the OLT increases. For this reason, (3) the ONT that has already been set from the OLT is required to hold the control information in its own device and automatically start up without error based on the held setting information when the power is turned on again.

In order to meet this demand, conventionally, for example,
G983.2Draft (Title: The ONT Managemen) specified by the International Telecommunication Union Telecommunication Standardization Sector (ITU-T)
As shown in (t and Control Interface Specification), means based on the sequence diagrams shown in FIGS. 7 and 8 are prepared on the OMCI interface. FIG.
And FIG. 8 is an operation sequence diagram on the ONU side in the conventional system. First, the processing in FIG. 7 is performed, and it is confirmed according to the sequence diagram in FIG. 8 whether the processing is operating normally. The process of FIG. 8 may be performed only once after the process of FIG. 7, but it is recommended in the above-mentioned G983.2 Draft that the process of FIG. 8 be performed at a certain long cycle.

FIG. 7 shows a general command / response operation specified by G983.2 Draft. In FIG. 7, commands are transmitted and received between the OLT and an operation system (MS) or a management device.
Management Information Base (MI
B) The data sync (data-sync) value is managed (steps 701 to 704), and the MIB data sync value is managed in both the OLT and the ONT, and command transmission / reception and autonomous message transmission from the ONU / ONT are performed. For the specified processing including the OLT, when receiving a command from the MS, the ONT uses the MIB when receiving a command from the OLT.
The data sync value is incremented by one (steps 705 to 705).
08). When the processing is performed normally, it is expected that the two match.

[0008] In order to guarantee information coincidence at the time of starting the apparatus, for example, when an event to be confirmed occurs or periodically.
As shown in the sequence diagram of FIG. 8, the OLT reads the MIB data sync value held by the ONT (step 801).
To 803), the value is compared with the value held for each ONT in the OLT (step 804). Specifically, an ONT data attribute (data attribute) defined as a management entity
It has been proposed to obtain the MIB data sync value of a GET using a Get command.

Here, the ONU / ONT has an instance information temporary holding unit and an instance information holding unit in the processor unit, as described later. Since the instance information temporary holding unit is excellent in processing speed, the processor basically uses the value of this area during actual operation, but since the data is lost when the power is turned off, ONT / ONT is set information from the OLT. Is stored in the instance information holding unit. However, storage media generally have slow access speeds, and write conditions are performed in units of sectors or segments.

If the MIB data sync value read from the ONT does not match the value held for each ONT in the OLT, the OLT transmits data for resetting the MIB data sink to the ONT, and the ONT receives the data. Generates only the automatically generated instance of the information in the instance information temporary holding unit, deletes the others, initializes all the MIB information to a predetermined initial value, and resets the MIB data sink value to 0 (step 805,806).

[0011] Then, the ONT notifies the OLT of the end of the above operation (step 808). At this time,
The OLT monitors whether or not the notification is within a predetermined time by a timer (step 807). Thus, ONT
Requests the MIB data sync value using the ONT data get command, and compares the values included in the response.

OLT receiving notification from ONT
Generates the information in the instance information temporary holding unit only for the automatically generated instance, deletes the others, and further generates M
Initializes all the IB information to a predetermined initial value.
Reset the IB data sync value to 0 (step 80)
9). On the other hand, if they do not match, ONT_Data_MI
After receiving the response to B_Reset, the OLT resets all the instance information to the ONT.

[0013]

However, in the above-mentioned conventional method, there is a possibility that the ONU / ONT may be turned off during the storing process from the OLT, and the actual instance information is stored in hardware by the data storing process. Considering that there is a processing delay, and that there is a possibility that a response to a command may be sent before all the actual processing is completed in order to improve the control performance of an access network to which many ONUs / ONTs are connected, A problem may occur that "the MIB data sync value matches in both the OLT and ONU / ONT, but there are instances where the actual information does not match."

That is, the ONU / ONT increments the MIB data sync value, and after the MIB data sync value becomes the same value as the OLT, the process of saving the actual instance information in hardware continues. If the power is turned off before the processing is completed, the information recognized by the OLT and the ONT after the power is turned on again
However, the conventional method has no means for detecting the mismatch.

For this reason, when the power is turned on again by the ONU / ONT, the ONU / ONT autonomously performs the setting of the device and the path setting using the instance information different from the OLT of the ONU / ONT. As a result, there is a drawback that incorrect device setting or path setting is performed and communication with the OLT becomes impossible.

Furthermore, there are various realization methods for storing the instance information in the ONU / ONT.
In particular, if only the path setting information is mismatched between the OLT and the ONU / ONT, a virtual path identifier (VPI: Virtual Path Identifier) used by another ONU / ONT user.
ifier) or a virtual channel identifier (VCI: V
irtual Channel Identifier)
There is a problem that not only a problem occurs in the communication of the ONU / ONT in which the problem has occurred, but also that an incorrect distribution may occur in the communication of another user.

In addition, in the conventional method, even when data mismatch between the OLT and the ONT is detected using the MIB data sync value, it is necessary for the OLT to set all the setting information again. There is also a problem that it takes.

The present invention has been made in view of the above points,
It is an object of the present invention to provide an access network remote control method capable of improving the accuracy of detecting mismatch of setting information (instance information) used when an OLT to be controlled and an ONT to be controlled autonomously start up by turning on power again. .

Another object of the present invention is to provide an OLT and an ON
An object of the present invention is to provide a stable access network remote control method by shortening the resynchronization time when the setting information mismatches with the U / ONT.

[0020]

In order to achieve the above object, the present invention provides a management device having a communication function for performing management and control, and one or more network terminal devices connected to the management device. In each of the management device and the network terminal device, the data sink value is updated for a specified process including command transmission / reception and autonomous message transmission, and when the process is performed normally, the management device and the network terminal device In an access network configured such that respective data sink values of the network terminal device match,
The management device receives a power-on notification from the network terminal device, and sends a command requesting the data sink value of the network terminal device itself to the network terminal device. Compares the transmitted data sink value with its own data sink value, and if not, controls the network terminal device to set its own data sink value and the data sink value of the network terminal device to initial values. Control means, the network terminal device includes: a notifying means for notifying the management device that the power is turned on; and a sending means for reading the data sink value and sending it to the management device based on a data sink value request command from the management device. It is characterized by having.

According to the present invention, the management device can detect whether the data sink value sent from the network terminal device matches its own data sink value every time the network terminal device is turned on. It is possible to immediately detect whether the two do not match as compared with the comparison detection processing performed in a long cycle as described above.

In order to achieve the above object, the present invention comprises a management device having a communication function for performing management and control, and one or more network terminal devices connected to the management device. And the network terminal update the data sink value for the specified processing including command transmission / reception and autonomous message transmission, and when the processing is performed normally, the management device and the network terminal respectively Is an access network having a function of storing an LSMI, which is attribute information for specifying a command last stored by the network terminal device. Receives the power-on notification from the network terminal device, and notifies the network terminal device of the network terminal First request means for transmitting a first command requesting the data sink value of the device itself, and comparing the data sink value transmitted from the network terminal device with the own data sink value based on the request. If the two do not match, the second request means for sending a second command requesting the LSMI to the network terminal device, and the LSM received after sending the second command
I based on the LSMI
And a control unit for resending commands subsequent to the command indicated by (1) and changing its own data sink value to the data sink value sent from the network terminal device.

Further, the network terminal device has a notifying means for notifying the power-on to the management device, and a first device from the management device.
A first sending unit that reads out a data sync value and sends it to the management device in response to receiving the command, and a second sending unit that reads out the LSMI value and sends it out to the management device in response to receiving the second command. .

According to the present invention, when the power of the network terminal device is turned on and the data sink value transmitted from the network terminal device does not match the data sink value of the network terminal device, the management device transmits the command after the command indicated by the LSMI. Since the command is resent and its own data sink value is changed to the data sink value sent from the network terminal device, it is necessary to redo all the settings again including the one that holds the normal setting information Command transmission / reception after the command including the instance information normally stored in the network terminal device.

In order to achieve the above object, the present invention provides the above access network, wherein the management apparatus receives an LSMI transmitted from a network terminal apparatus,
Means for clearing information on a previous command including the command indicated by the MI from the memory, and comparing the data sink value sent from the network terminal device with its own data sink value. When the transmitted command is executed, the updating means for updating and storing the data sink value and the LSMI value, and the data sink value and the LS
And a transmitting means for autonomously transmitting the MI value to the management device.

According to the present invention, since the data sync value and the LSMI value are transmitted from the network device to the management device autonomously, particularly for important setting information, for example, an erroneous setting affects other users. It is possible to immediately notify the management device of the end of storage of the given instance information.

The management device according to the above invention is
OLT on MCI, network terminal device is ONT or ONU on OMCI, OLT
T receives control information from the management device, manages and controls the ONT or ONU according to the OMCI protocol based on the control information, and the LSMI uses a message sequence number of a cell used in the OMCI.

According to the present invention, the instance information included in the setting command message from the OLT is set to ON.
Of the commands including instance information for which data storage processing has been completely completed in T, the value specifying the last stored command is to be managed, and the already defined ONT
The data attribute is additionally defined as “LSMI”. This value is also stored in the instance information holding unit. At the same time, a get message and a get response message for this attribute are additionally defined. Further, the OLT issues an LSMI value read request using a get command additionally defined by the present invention, and
When T receives a get command for the LSMI, it returns a value temporarily held.

[0029]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an access network remote control system according to the present invention. In this embodiment, a management device 1 operated by a maintenance person
20, an access network consisting of the OLT 131 and the ONT / ONU of the user is shown. The OMCI interface is defined between the OLT 131 and the ONT. ONT / ON
As for U, n units (n is plural) can be connected to the OLT 131 via the optical branching (splitter) 121, but for convenience of illustration, in FIG. 1, only one ONT / ONU 101 is represented as an internal detailed block. The operation will be described with reference to FIG.

The hardware configuration of the ONT / ONU 101 and the hardware configuration of the OLT 131 are the same as those of the conventional system.
7 and a method realized by operating the main processor unit 135 by software.

In FIG. 1, the OLT 131 receives control information from the management device 120 and holds the master information in the NE unit 137. Since the master information of the NE unit 137 uses a protocol different from that of the OMCI, and the configuration of the management object is an optimal configuration for the management apparatus 120, the software of the main processor 135 of the OLT 131 transmits the OMC
A mapping is performed to determine what kind of control is actually performed on the I, and the instance information temporary storage unit 136 in the OLT 131 is mapped.
The AAL5 processing unit 134 creates a format of the OMCI protocol, and sends a message to the corresponding ONT through the main signal processing unit 132. Alternatively, the AAL5 processing unit 134 detects a packet from the main signal received from the ONU / ONT 101, and the main processor 135 processes the OMCI protocol.

ONU / ONT101 to ONU / ONT1
0n does not have an interface that is directly controlled by the management device 120, and the OMC 131
It is controlled by the I protocol. ONU / ONT10
Reference numeral 1 denotes an AAL5 processing unit 105 which detects an AAL5 packet from a main signal received from the OLT 131, and
OMCI with 07 software or firmware
Analyze the message.

Here, the cell between the main signal processing unit 132 and the AAL5 processing unit 134 and the main signal processing unit 103 and the AA5
A cell between the L5 processing units 105 has an OM as shown in FIG.
This is a cell of the message format of the CI protocol. Since the cell itself is well known to those skilled in the art, detailed description is omitted, and the outline is described. FIG.
Cell 200 is an ATM header 2 determined by the ATM layer.
01 and AAL5 trailers 215 and other OMC
It consists of a part determined as I.

The AAL5 trailer 215 is fixed-length information arranged in an ATM payload for one ATM cell. In the standardization of OMCI, it is determined that one message is used with a fixed length of the ATM1 cell, and the AAL5 trailer 215 on the OMCI message is information of a fixed length arranged in the ATM payload for one ATM cell.

The TCI 202 is an area for the OLT 131 to confirm the arrival of a command. Specifically, the TCI 202 has a message priority (Message Priority) area 203 and a message sequence number (Message Sequence num).
ber) area 204. The former is for giving priority to the control from the OLT 131. The latter is an area for actually confirming the arrival of the command, and the ONT inserts the same value into the response to the received command and transmits it.

In the present embodiment, the value of this area 204 is used to determine in the instance information holding unit 102 in the ONU / ONT 101 which message sequence number has been saved up to the setting information for each instance for a command having a message sequence number. This value is used for the LSMI value to be managed.

The message type (MT) field 205 is
This area is used by the OLT 131 to notify the ONU / ONT 101 of what message is included, or the ONU / ONT 101 notifies the OLT 131 of what kind of processing has been performed. Bit area 206, acknowledgment / request bit area 207, acknowledgment area 208, and message type bit area 2
09.

An area 206 is a protocol other than OMCI, and has a protocol having the same format on the ATM layer, and is an area used in the protocol.
The area 207 is from the OLT 131 to the ONU / ONT 101
OLT131 is a message sent to ONU / O
This is an area indicating whether a response is requested from the NT 101. The area 208 is the ONU / ONT 101
In the message sent from OLT to OLT 131, OLT
An area indicating whether or not the message is a reply to the message 131, and an area 209 is an area indicating the type of the message.

Also, the device identifier (D
I) Area 210 is a protocol other than OMCI,
On the M layer, there is a protocol having the same format, so that it is an information storage area for discrimination. Also,
Message identifier (MI) area 211
Is composed of a managed entity class area 212 and a managed entity instance area 213. An area 212 is an information storage area indicating which managed entity class of the ONU / ONT 101 is a control command. An area 213 is an information storage area indicating which instance of the managed entity class indicated by the area 212 is a control command. Is shown.

Further, the message content area 214
When information of the areas 212 and 213 is specified in a message sent from the OLT 131 to the ONU / ONT 101, it is possible to determine which of the attributes having the instance is controlled. In the area for storing the information to be indicated, in the case of a reply to the OLT 131, the result of the control is indicated, and the ONU /
In the message autonomously transmitted by the OLT 101, information indicating which attribute has changed to what state among the attributes of the instance designated from the information of the areas 212 and 213 is included.

Referring back to FIG. 1, ONU / ONT
101 is software or firmware of the processor unit 107, and is an OM except for the areas 201 and 215 in FIG.
When the CI message is analyzed and the message type is determined from the MT area 205 in the message, the managed entity class and the instance are specified from the MI area 211 included in the message of the setting system, and the message content area 214 is specified. First, the included instance information is held in the instance information temporary holding unit 108 in the processor unit 107. In the message transmission / reception process with the OLT 131, the instance information temporary holding unit 10
8 is used. However, the instance information temporary holding unit 108 loses all the stored contents when the power is turned off.
Save a copy in Step 2.

When the power is turned on again, the processor unit 1
07 is the instance information holding unit 102
To the instance information temporary storage unit 108,
Based on this information, logical settings such as hardware settings in the apparatus and connections between OLTs are performed. That is, the software of the processor unit 107 determines the control of the setting register unit from the managed entity class and the setting information included in the instance information in the instance information temporary holding unit 108, and performs the setting in the setting register unit. At this time, the instance information holding unit 102 and the instance information temporary holding unit 108 are also provided with areas for managing LSMI values.

The processor unit 10 of the ONU / ONT 101
7 stores the information in the instance information holding unit 102, and updates the LSMI value managed by the instance information temporary holding unit 108. The software is LS managed by the instance information temporary storage unit 108
The MI value is also copied and stored in the instance information holding unit 102.

Next, the operation of this embodiment will be described with reference to the sequence diagrams of FIGS. In the present embodiment, the same operation as that of the conventional method shown in FIGS. 7 and 8 is performed. However, in the present embodiment, the operations of Steps 705 to 708 in FIG. 6 is performed.

That is, the management device (MS) 1
20 sends a command to the OLT 131. The OLT 131 that receives the command updates the MIB information and returns a response to the management device 120.
Reference numeral 131 denotes a state before a command is sent to the ONU / ONT 101 (Command-B1), and the ONU / O
The NT 101 is in a state before sending the response signal (Response-B1).

In this state, as shown in FIG.
LT131 adds 1 to the MIB data sync value, and
In a state where the data sync value has become α (this is described as +1 (= α) in FIG. 3 and other drawings), only one command is ONU.
/ ONT 101 (steps 301 and 302; this corresponds to step 705 in FIG. 7), the ONU / ONT 101 analyzes the contents of the command, determines the execution contents, and generates response data. O
It is sent to the LT 131 (steps 304 and 305; this corresponds to steps 706 and 708 in FIG. 7).

The ONU / ONT 101 is shown in FIG. 7 to return a response after all the processing is completed, but actually, as shown in FIG.
The response from the ONT 101 is monitored by a timer (step 303). Generally, in order to improve the performance of the entire network, the timer value is shorter than the total time required for all the processes of the ONU / ONT 101, and the ONU / ONT 101 performs the response process first after performing the response process as shown in FIG. control,
The MIB data sync value is updated (steps 306 and 307).

For LSMI, which is one of the features of the present invention, the processor unit 107 in the ONU / ONT 101 copies the instance information in the received command from the temporary instance information storage unit 108 to the instance information storage unit 102 (step 308). ), Update after storage (step 309). ONU / ONT1 for LSMI value
01 in the LSMI area of the instance information holding unit 102. However, it is not necessary to store the LSMI value from the instance information temporary holding unit 108 to the instance information holding unit 102 each time other instance information is stored.

When the storage is normally completed, the OLT 131 is notified of the change of the LSMI value and the MIB data sync value to the ONU / ONT 101 using an attribute value change message (step 310). The OLT 131 releases the received message and compares and confirms that the MIB data sync value is α (step 311). As a result, if there is no problem, it is determined that retransmission is unnecessary for the command 1 assuming that the storage processing has already been completed (step 312).

Every time a command is received that the MIB data sync value is α, the value is updated to the LSMI of the LSMI area holding unit of the instance information holding unit 102 or the value of the temporary holding unit 108 is updated to a certain number of times. This is determined by the requirements of the system, and both are possible in the present invention.

Next, the ONU / ONT1 from the OLT 131
The operation of this embodiment when a plurality of commands continuously arrive at 01 will be described with reference to the sequence diagram of FIG. The OLT 131 adds one to the MIB data sync value, and the first command 1 is sent to the ONU / ONT 101 having the MIB data sync value α-1 in a state where the MIB data sync value has become α. (Steps 401 and 403), the processor unit 107 of the ONU / ONT 101 analyzes the contents of the command, determines the execution contents, generates first response data, and generates an OLT.
131 (steps 402, 405, 410,
411).

In the OLT 131 in which the MIB data sync value is α after the transmission of the command 1, just before transmitting the second command 2, 1 is added to α, and Assuming that the command 2 has been sent to the ONU / ONT 101 before generating the first response data (steps 406 and 407), the ONU / ONT 1
01 analyzes the content of the command,
The execution content is determined, and second response data is generated and transmitted to the OLT 131 (steps 409, 415, and 4).
16).

Subsequently, in the OLT 131 whose MIB data sync value is β after the transmission of the command 2, immediately before transmitting the third command, 1 is added to β, and Assuming that the third command is sent to the ONU / ONT 101 before the generation of the second response data (steps 412 and 413), the ONU / ONT
The processor unit 101 analyzes the content of the command, determines the content of execution, generates third response data, and sends it to the OLT 131 (steps 417 and 41).
8, 420).

After generating and sending the first, second, and third response data, the processor unit 107 of the ONU / ONT 101 executes hardware (HW) control corresponding to each received command, and , MI
Each of the B data sync values is updated by adding 1 to α-1, updating to α, adding 1 to α, updating to β, adding 1 to β, and updating to γ (steps 419, 421, 422). In addition,
The main processor 135 of the OLT 131 monitors the response data arrival timer for each of the commands 1 to 3 (steps 403, 408, 41).
4).

Subsequently, the processor unit 107 of the ONU / ONT 101 stores the instance information in the received three commands in the instance information temporary storage unit 108 and saves it in the instance information storage unit 102 (step 423). For the LSMI value, refer to L in Command 3.
The SMI value is stored again in the LSMI area of the instance information holding unit 102 (Step 424). However, LSM
It is not necessary to store the I value from the instance information temporary storage unit 108 to the instance information storage unit 102 each time other instance information is stored.

When the storage is normally completed, the ONU / ONT 101 is sent a command 3 using an attribute value change message.
OLT1 changes the LSMI value and MIB data sync value of
31 is notified (step 425). The OLT 131 interprets the received message and compares and confirms that the MIB data sync value is γ (step 426). As a result,
If there is no problem, it is determined that retransmission is unnecessary for commands up to command 3 since it has been completed up to the saving process.
And the corresponding information of the MSN and the contents of (2) are cleared (step 427).

As described above, the ONU / O from the OLT 131
When a plurality of commands arrive continuously at the NT 101, the save processing of the instance information and the update of the LSMI value are not performed one command at a time, but are performed collectively. This is because, depending on how the area of the instance information holding unit 102 is allocated, when the storage processing is performed for a plurality of instance information at once when the area is in the same area, the performance may be improved. In FIG. 4, the command 1,
Save process of instance information and L for 2 and 3
Although the update of the SMI value has been performed collectively, there may be a case where the commands 1 and 2 are collectively performed, and then the instance information save processing of the command 3 and the LSMI value are updated.

Next, from the OLT 131 to the ONU / ONT 1
In the case where three commands arrive consecutively with respect to 01, the processing of the present embodiment, in which the command 1 is processed for the save processing of the instance information and the update of the LSMI value, and then the processing of the commands 2 and 3, is described. 5 will be described with reference to the sequence diagram of FIG. From the OLT 131 in which the MIB data sync value was originally α-1 before sending out the first command 1 and became α by adding 1, the first command 1 is ONU / Assuming that the message has been sent to the ONT 101 (steps 501 and 502),
The processor unit 107 of the U / ONT 101 analyzes the content of the received command, determines the content of execution, generates first response data, and sends it to the OLT 131 (step 5).
03, 504, 505).

After the transmission of the command 1, α after adding 1 to the MIB data sync value, and also the LSMI value are ON.
L of the instance information holding unit 102 of the U / ONT 101
The data is stored again in the SMI area (steps 507 and 50).
8). Then, attribute value change
LSM to ONU / ONT101 using message
The OLT 131 is notified of the change of the I value and the MIB data sync value (step 509). The OLT 131 compares and confirms that the MIB data sync value is α (step 51).
1), the value β obtained by adding 1 to the MIB data sync value α is held (step 512). Then, from the received message, it is determined that the command 1 has already been subjected to the preservation processing and that retransmission is unnecessary (step 51).
0).

Subsequently, assuming that the second command 2 has been sent from the OLT 131 to the ONU / ONT 101 at time t2 (step 513), ONU / ON is assumed.
The processor unit 107 of T101 analyzes the content of the command, determines the content of execution, generates the second response data, and sends it to the OLT 131 (steps 515 and 51).
6, 519). Main processor 13 of OLT 131
5, after transmitting the command 2 from the main signal processing unit 132, the timer 5 monitors the reception of the response data (step 514).

Subsequently, as a pre-process for transmitting the third command 3 from the OLT 131, the MIB data sync value β
To the MIB data sync value γ
Is held before receiving the second response data.
Assuming that the command has been transmitted to the NU / ONT 101 (step 518), the processor unit 107 of the ONU / ONT 101 analyzes the content of the command, determines the content of execution, generates third response data, and transmits the third response data to the OLT 131. (Steps 521, 522, 523). In addition,
After transmitting the command 3 from the main signal processing unit 132, the main processor unit 135 of the OLT 131 monitors the reception of the response data by a timer (step 520).

The processor unit 10 of the ONU / ONT 101
7 generates and sends the second and third response data, executes hardware (HW) control corresponding to each received command, adds one to the α of the MIB data sync value, and adds β to the β. And 1 is added to β and γ
(Steps 524 and 525).

Subsequently, the processor unit 107 of the ONU / ONT 101 stores the instance information in the two commands 2 and 3 received after the time t2 in the temporary instance information storage unit 108, and then stores the instance information in the instance information storage unit 102.
(Step 526), the LSMI value of the command 3 is stored again in the LSMI area of the instance information holding unit 102 (step 52).
7). However, the storage of the LSMI value from the instance information temporary holding unit 108 to the instance information holding unit 102 is as follows.
It is not necessary to do this every time other instance information is stored.

Subsequently, using the attribute value change message, the OLT 13 notifies the ONU / ONT 101 of the change of the LSMI value and the MIB data sync value.
1 is notified (step 530). The OLT 131 compares and confirms that the MIB data sync value is γ from the received message (step 529). Then, it is determined that retransmission is unnecessary for commands 2 and 3 as having been completed up to the storage processing, and the correspondence information between the contents of commands 1 and 2 and the MSN is cleared (step 530).

In FIG. 5, the number of commands to be processed at once is determined by the implementer and may be a fixed number of commands, a command received within a fixed time, or another ONT in a message. For an instance that has an effect on, an immediate saving process may be performed. This is a matter to be determined by the applicable system.

Next, an example of the processing operation of the present embodiment when the ONU / ONT 101 turns off the power once and then turns on the power again will be described with reference to the sequence diagram of FIG. When the power of the ONU / ONT 101 is turned on (step 601), the PHY is turned on.
The OLT 131 is notified according to the layer protocol (step 602). As a result, the OLT 131 is turned on.
It recognizes that the power of the U / ONT 101 has been turned on (step 603), and notifies the ONU / ONT 101 of the MIB.
A get command requesting a data sink value is sent (step 604), and timer monitoring is started (step 60).
5).

When the power is turned on, the processor unit 107 reads out the instance information stored in the instance information holding unit 102 and performs an operation of copying the instance information to the instance information temporary holding unit 108. It controls the register unit 106.

The ONU / ONT 101 receives the above-mentioned get command, analyzes the content thereof, determines the content of execution (step 606), reads the MIB data sync value (step 607), generates response data, and
The data is sent to the OLT 131 together with the IB data sync value (steps 608 and 609). The main processor unit 135 of the OLT 131 transmits the received MI of the ONU / ONT 101 to the
The B data sync value is compared with a value held for each ONU / ONT in the instance information temporary holding unit 136 in the OLT 131 (step 610).
A data get command requesting the LSMI value is generated and transmitted to the ONU / ONT 101 through the AAL5 processing unit 134 and the main signal processing unit 132 (step 61).
At the same time as 1), the timer monitoring of the response data reception is started (step 612).

The processor unit 10 of the ONU / ONT 101
7 transmits the above command to the purpose processing unit 103 and the AAL5
After receiving the data via the processing unit 105 and analyzing the content and determining the execution content (step 613), the LSMI value is read from the instance information temporary storage unit 108 (step 614), response data is generated and MIB data is generated. It is sent to the OLT 131 through the AAL5 processing unit 105 and the main signal processing basic unit 104 together with the sync value (step 6).
15, 616). OLT131 Main Processor 1
Reference numeral 35 denotes the ONU / ONT 101 up to the content of the command X based on the received LSMI value of the ONU / ONT 101.
(Step 61)
7).

Here, the X of the command X recognized by the main processor unit 135 in the OLT 131 is, for example, at any timing from T = t0 to T = t6 in FIG.
It depends on whether the ONT 101 is powered off. In the following description, a case will be described in which the LSMI value is also stored in the instance information holding unit 102 every time the LSMI is updated. When the power of the ONU / ONT 101 is turned off at T = t1 in FIG. 5, it can be detected only by the MIB data sync value. When the power of the ONU / ONT 101 is turned off at T = t2 in FIG. 5, there is a possibility that an erroneous detection may be made based on the MIB data sync value. However, since the LSMI has been updated in step 508, if the LSMI is confirmed, the command It can be confirmed that the processing is completed up to 1.

When the power supply of the ONU / ONT 101 is turned off at T = t3 in FIG. 5, if the MIB data sync values can be stored, the MIB data sync values become equal, so that resetting from the OLT 131 does not occur. . If the MIB data sync value cannot be stored, LSMI = 1 can be read, so the OLT 131 retransmits the command 2 and subsequent commands. When the power of the ONU / ONT 101 is turned off at T = t4 in FIG. 5, since the ONU / ONT 101 has already updated the LSMI value of the command 3, the MIB data sync value is equal to that of the OLT 131 and resynchronization occurs. Absent.

The main processor section 135 of the OLT 131
Changes the MIB data sync value to the read value from the ONU / ONT 101 and determines that the command before the LSMI value from the ONU / ONT 101 is Msg . Clear the content and correspondence information of MSN,
Further, the command from the ONU / ONT 101 for the command after the LSMI value is retransmitted (step 618).

Then, the main processor unit 135 of the OLT 131 sequentially retransmits fixed-length commands after the latest command specified by the LSMI value (steps 619 to 619).
620), ONU / ONT 101 for the command
(Steps 621 to 62)
2), a get command requesting the MIB data sync value is transmitted to the ONU / ONT 101 (step 623);
The MIB data sink value transmitted from the ONU / ONT 101 in response to the get command is received (step 624). After that, the main processor unit 135 of the OLT 131 sends a command, and the ONU / ONT 10
1 is received (step 621).

As described above, in this embodiment, the OLT
ONU / ONTs 101 to 10n for the instance information included in the setting command message from
Among the commands including the instance information for which the data storage processing has been completely completed in the above, the value specifying the last stored command is to be managed, and the attribute of the ONT data which is a previously defined managed entity is "LSMI". And stored in the instance information holding unit 102, and the OLT 131
An LSMI value read request is made using a get command defined for autonomous reading from the NTs 101 to 10n.

Then, ONU / ONT 101 to 10n
Updates the LSMI value when new instance information is stored, and notifies the OLT 131 of the LSMI value as needed using an attribute value change message.
Therefore, the ONU / ONT compares the MIB data sync value from the OLT with that managed by the ONU / ONT, and if both match, it is determined that the instance information also matches. Even if there is an inconsistency in information due to power cutoff before completion of data storage processing by the latest command, the OLT 131 cannot be used when power is turned on.
Request the MIB data sync value from the ONUs / ONTs 101 to 10n and detect a mismatch between the OLT and the ONT.

Therefore, OLT 131 is ONU / ONT1.
While controlling to 01 to 10n, ONU / ON
While the T101 to 10n store the control information from the OLT 131 inside the device, the ONU / ONT1
When the power of 01 to 10 n is turned off, the OLT 13
1 and the ONU / ONTs 101 to 10n are turned on again from the state where the information mismatch between the ONUs / ONTs 101 to 10n occurs, and the ONUs / ONTs 101 to 10n are turned on again based on the information held by the ONUs / ONTs 101 to 10n. When starting up, communication failure due to information mismatch with the OLT 131 side or other ONUs connected to the same OLT 131
/ ONT user can be prevented from being mixed with cells.

In this case, the OLT 131 has the LSMI
Instead of acquiring the values from the ONUs / ONTs 101 to 10n and redoing all the settings, the setting information after the message specified by the LSMI value is returned to the ONU / ONT 10 again.
Since transmission is performed from 1 to 10n, the number of reset commands at the time of mismatch detection can be reduced and time can be reduced.

The present invention is not limited to the above embodiment. For example, it is not necessary to notify the LSMI value by the attribute value change message. In this case, the OLT is confirmed at a necessary timing by the get command. In this example, if it is not desired to increase the bandwidth due to the attribute value change message, or if the buffer for temporarily storing the attribute value change message is O
This is effective when it cannot be sufficiently held in the LT.

[0079]

As described above, according to the present invention,
Each time the network terminal device is turned on, the management device detects whether or not the data sink value sent from the network terminal device matches its own data sink value. Compared to the detection process, it is possible to immediately detect whether the two do not match. For example, while the management device is controlling the network terminal device, or the network terminal device stores control information from the management device inside the device. If the power of the network terminal device is turned off during the processing, the power of the network terminal device is turned on again from the state where the information mismatch between the management device and the network terminal device has occurred, Information mismatch with the management device when the network terminal device starts up its own device based on the information held by its own device Incommunicable state and by, it is prevent contamination with other network terminal device user cells connected to the same management system.

Further, according to the present invention, when the power of the network terminal device is turned on and the data sink value sent from the network terminal device does not match its own data sync value, the management device operates normally. There is no need to redo all settings including the one that holds the setting information, and it is only necessary to send and receive commands after the command containing the instance information normally stored in the network terminal device. It is possible to reduce the number of messages to the terminal device, reduce the amount of information that the network terminal device itself performs storage processing, and shorten the time until resynchronization.

Further, according to the present invention, the data sink value and the LSMI
By sending the value, it is possible to immediately notify the management apparatus of the end of saving of particularly important setting information, for example, instance information in which an erroneous setting affects other users. The load on the device can be reduced, and the reliability of the control information held by the network terminal device can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a message format diagram of the OMCI protocol.

FIG. 3 is a sequence diagram showing an example of an ONT operation when only one command is transmitted from the OLT of the present invention.

FIG. 4 is a sequence diagram showing an example of a case where a plurality of commands continuously arrive from an OLT to an ONT according to the present invention.

FIG. 5 is a sequence diagram showing an example of processing commands 2 and 3 after processing command 1 from the OLT to the ONT according to the present invention.

FIG. 6 is a sequence diagram showing an example of a process when the ONT of the present invention turns off the power once and then turns on the power again.

FIG. 7 is a sequence diagram illustrating a general command-response operation specified by G983.2 Draft.

FIG. 8 is a sequence diagram illustrating a general command-response operation specified by G983.2 Draft.

[Explanation of symbols]

 Reference Signs List 101 ONU / ONT # 1 10n ONU / ONT # n 102 Instance information holding unit 103 Output signal processing unit 104 Output signal processing basic unit 105, 134 AAL5 processing unit 106 Setting register unit 107 Processor unit 108 Instance information temporary holding unit 120 Management device 131 OLT 132 Output signal processing unit 133 Insertion / separation processing unit 135 Main processor unit 136 OLT instance information temporary storage unit 137 NE unit 202 TCI 204 Message sequence number area 205 Message MT area 205

Claims (6)

[Claims] 1. A management device having a communication function for performing management and control, and one or more network terminal devices connected to the management device. In each of the management device and the network terminal device, The data sink value is updated for specified processing including command transmission / reception and autonomous message transmission, and when the processing is performed normally, the data sink values of the management device and the network terminal device match. In the access network configured to perform the above, the management device receives a power-on notification from the network terminal device, and issues a command requesting the data sink value of the network terminal device itself to the network terminal device. Requesting means for transmitting, and the data transmitted from the network terminal device based on the request. Control means for comparing the data sync value with its own data sync value to determine whether the data sync value matches the data sync value of the network terminal device. The network terminal device comprises: a notifying unit for notifying the management device that the power is turned on; and a data sink value is read out and transmitted to the management device based on the data sink value request command from the management device. An access network remote control system, comprising: sending means. 2. A management device having a communication function for performing management and control, and one or more network terminal devices connected to the management device. In each of the management device and the network terminal device, The data sink value is updated for specified processing including command transmission / reception and autonomous message transmission, and when the processing is performed normally, the data sink values of the management device and the network terminal device match. LSM, which is attribute information for specifying the last command stored by the network terminal device.
An access network having a function of storing I, wherein the management device receives a power-on notification from the network terminal device, and sends the data sink value of the network terminal device itself to the network terminal device. First request means for sending a first command to be requested, and comparing the data sink value sent from the network terminal device with its own data sink value based on the request, Second request means for sending a second command requesting the LSMI to the network terminal device; and, based on the LSMI received after sending the second command, LSM
Control means for resending commands subsequent to the command indicated by I and changing the data sink value of the own device to the data sink value transmitted from the network terminal device, wherein the network terminal device manages power-on Notification means for notifying the device; and receiving the first command from the management device,
A first sending unit that reads out the data sink value and sends it to the management device; and a second sending unit that reads out the LSMI value and sends it to the management device in response to receiving the second command. An access network remote control method characterized by the following. 3. A management device having a communication function for performing management and control, and one or more network terminal devices connected to the management device. In each of the management device and the network terminal device, The data sink value is updated for specified processing including command transmission / reception and autonomous message transmission, and when the processing is performed normally, the data sink values of the management device and the network terminal device match. LSM, which is attribute information for specifying the last command stored by the network terminal device.
An access network having a function of storing the LSMI transmitted from the network terminal device.
Means for receiving from the memory information related to the previous command including the command indicated by the LSMI, and comparing the data sink value sent from the network terminal device with its own data sink value, When executing the command sent from the management device, the network terminal device updates the data sync value and the LSMI value and saves the data sync value and the LSMI value. Transmission means for transmitting data to the management device. 4. When a plurality of commands continuously sent from the management device are received, the updating means of the network terminal device analyzes and executes control of each command each time the command is received. 4. The access network remote control system according to claim 3, wherein the data sync value is updated and stored, and the LSMI value is updated and stored when a predetermined number of commands are received. 5. A management device having a communication function for performing management and control, and one or more network terminal devices connected to the management device. In each of the management device and the network terminal device, The data sink value is updated for specified processing including command transmission / reception and autonomous message transmission, and when the processing is performed normally, the data sink values of the management device and the network terminal device match. LSM, which is attribute information for specifying the last command stored by the network terminal device.
An access network having a function of storing I, wherein the management device receives a power-on notification from the network terminal device, and sends the data sink value of the network terminal device itself to the network terminal device. First request means for sending a first command to be requested, and comparing the data sink value sent from the network terminal device with its own data sink value based on the request, Second request means for sending a second command requesting the LSMI to the network terminal device; and, based on the LSMI received after sending the second command, LSM
Control means for resending commands subsequent to the command indicated by I and changing its own data sink value to a data sink value sent from said network terminal device; and said LSMI sent from said network terminal device.
Means for receiving from the memory information related to the previous command including the command indicated by the LSMI, and comparing the data sink value sent from the network terminal device with its own data sink value, The network terminal device includes: a notification unit that notifies the management device that power is turned on; and a first device that reads the data sink value and sends the data sink value to the management device by receiving the first command from the management device.
Sending means for reading out the LSMI value in response to the reception of the second command and sending it to the management device; executing the command sent from the management device, the data sink value and Access means for updating and storing the LSMI value; and third transmitting means for autonomously transmitting the data sink value and the LSMI value to the management device after the updating and storing by the updating means is completed. Network remote control method. 6. The management device is an optical line terminal (OLT) on an optical network terminal management and control interface (OMCI), and the network terminal device is an optical line terminal on the OMCI. A network terminal (ONT) or an optical network unit (ONU), wherein the OL
T receives control information from a management device, manages and controls the ONT or ONU according to the OMCI protocol based on the control information, and the LSMI uses a message sequence number of a cell used in the OMCI. The access network remote control system according to any one of claims 1 to 5, wherein