JP6788075B2 - Communication device, startup method and program - Google Patents

Description

The present invention relates to communication devices, activation methods and programs.

Some network devices are used by subscribers to access the network. As an access system using such a network device, for example, there is a PON (Passive Optical Network) system (see, for example, Non-Patent Document 1). The PON system consists of an ONU (Optical Network Unit) installed in the customer's home, an OLT (Optical Line Terminal) installed in the station building, and an optical fiber that connects multiple ONUs and OLTs. It consists of a fiber network.

A communication device having a sleep function may be used as the network device. When a device having a sleep function goes from a wake-up state to a sleep state, the power of the device may be stopped. When the sleeping device is turned on again, the normality of the device is confirmed, such as a memory check (see, for example, Non-Patent Document 2).

"ITU-T G.989.1", International Telecommunication Union, 2013 "Checking the effectiveness of the memory diagnostic tool-is it a must-have tool for IT administrators?-", [Online], ITmedia, Inc., [Search on December 16, 2015], Internet <URL: http //tokkyo.shinsakijun.com/information/newtech.html>

If the device is turned off due to a sleep state and then restarted, there is a problem that the startup time is long. As described above, this startup time includes the time required for checking the normality of the device at startup, such as a memory check. When the device is a communication device, communication with other devices cannot be performed while the normality is confirmed, so that communication delay may occur.

In view of the above problems, it is an object of the present invention to provide a communication device, an activation method and a program capable of shortening the activation time.

One aspect of the present invention includes a communication unit that communicates with other devices, and a control unit for controlling the power state of own apparatus, before Symbol controller, state control for controlling the power state of the own device Information on the failure probability of the unit, the own device or the parts that make up the own device, information on the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the normality according to the failure probability. A judgment unit that determines the necessity of normality confirmation when the power is turned on based on at least one of the probability calculations of the necessity of confirmation, and the above-mentioned judgment unit when the power of the own device is started from the stopped state. and a normality confirmation unit for performing execution or inhibition of normality confirmation process at power startup according to a result of determination by the said information on the failure probability of the components of the own device or the device itself, the power consumption It is characterized by information on accumulation, period when no voltage is applied, power consumption , number of frames that could not be transmitted or received by the own device, or difference between the required band and the band with which the own device communicated. It is a communication device.

One aspect of the present invention includes a communication unit that communicates with other devices, and a control unit for controlling the power state of own apparatus, before Symbol controller, state control for controlling the power state of the own device The unit, the judgment unit that determines the necessity of normality confirmation at the time of power startup based on whether the failure probability based on the own device or the parts constituting the own device exceeds the threshold value, and the power supply state of the own device is stopped. when starting from a communication device according to claim Rukoto which have a and normality confirmation unit for performing execution or inhibition of normality confirmation process when power is turned in accordance with the result determined by the determination unit.

One aspect of the present invention includes a communication unit that communicates with other devices, and a control unit for controlling the power state of own apparatus, before Symbol controller, state control for controlling the power state of the own device Information on the failure probability of the parts and parts that make up the own device, information on the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the necessity of normality confirmation according to the failure probability. Based on at least one of the probability calculations of, the judgment unit that determines the necessity of normality confirmation when the power is turned on, and the judgment result by the judgment unit when the power of the own device is started from the stopped state. It has a normality check unit that executes or suppresses the normality check process when the power is turned on, and the judgment unit determines the allowable communication stop time based on the past communication traffic of the own device and is normal. The communication device is characterized in that it determines whether or not it is necessary to confirm the normality when the power is started, depending on whether or not the start-up time when the sex is confirmed exceeds the allowable communication stop time.

One aspect of the present invention is the above-mentioned communication device, in which the control unit turns off the power of the own device when the own device is in the sleep state, and when the own device goes from the sleep state to the operating state. Turn on the power of your own device.

One aspect of the present invention is the above-mentioned communication device, which is either an optical subscriber line termination device or an optical line termination device in a passive optical network.

One aspect of the present invention is the activation method used in a communication device that communicates with other devices, the components constituting the state control step of controlling the power state of own apparatus, the pre-Symbol self apparatus or self device failure Based on at least one of the information about the probability, the information about the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the probability calculation of the necessity of normality confirmation according to the failure probability. Therefore, when the power supply of the own device is started from the stopped state, the normality confirmation process at the time of power supply is executed or executed according to the judgment result by the judgment process. have a, and health check process of performing suppression, the own device or the said information on the failure probability of the components of the apparatus itself, cumulative, no voltage is applied period of power consumption, power consumption, in its own device This is an activation method characterized in that it is information on the number of frames that could not be transmitted or received, or the difference between the requested band and the band in which the own device communicated.

One aspect of the present invention is the activation method used in a communication device that communicates with other devices, the components constituting the state control step of controlling the power state of own apparatus, the pre-Symbol self apparatus or self device failure Based on at least one of the information about the probability, the information about the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the probability calculation of the necessity of normality confirmation according to the failure probability. Therefore, when the power supply of the own device is started from the stopped state, the normality confirmation process at the time of power supply is executed or executed according to the judgment result by the judgment process. possess a normality confirmation process of performing suppression, and in the determination step, beyond the period up period with parts running when the device itself constitutes the period or the self apparatus operating becomes a predetermined amount or more of a failure probability It is a start-up method characterized in that it is determined whether or not it is necessary to check the normality when the power is turned on.

One aspect of the present invention is a start-up method used for a communication device that communicates with another device, which includes information on a state control process for controlling the state of the power supply of the own device, information on a failure probability of a component constituting the own device, and When the power is turned on, based on at least one of the information about the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the probability calculation of the necessity of normality confirmation according to the failure probability. Judgment process for determining the necessity of normality confirmation in the above, and normality in which when the power supply of the own device is started from the stopped state, the normality confirmation process at power startup is executed or suppressed according to the judgment result by the above judgment process. possess a confirmation process, and in the determination step, it is determined based on the communication stop time allowed past the communication traffic of its own device, the startup time when performing normality checking is allowed the This activation method is characterized in that it is determined whether or not it is necessary to confirm the normality at the time of power activation depending on whether or not the communication stop time is exceeded.

One aspect of the present invention is a program for causing a computer used as a communication device that communicates with another device to function as the above-mentioned communication device.

According to the present invention, the startup time of the communication device can be shortened.

It is a figure which shows the structural example of the PON system in 1st Embodiment of this invention. It is a figure which shows the configuration example of the PON system in the 2nd Embodiment. It is a figure which shows the configuration example of the PON system in 4th Embodiment. It is a processing flow which shows the normality confirmation necessity determination processing which OLT executes in the same embodiment.

Embodiments of the present invention will be described in detail with reference to the drawings.

(First Embodiment)
FIG. 1 is a functional block diagram showing a configuration of a PON (Passive Optical Network) system 1 according to the first embodiment of the present invention, in which only functional blocks related to the present embodiment are extracted and shown. is there. The PON system 1 is a communication system used as an access network. The PON system 1 includes an ONU (Optical Network Unit) 2 installed in the customer's house and an OLT (Optical Line Terminal) 3 installed in the station building. The OLT 3 and the plurality of ONUs 2 are connected via the optical fiber network 4.

The optical fiber network 4 is configured by connecting optical fibers with an optical coupler 5-1 and an optical coupler 5-2. The optical coupler 5-1 multiplexes the optical signal of uplink communication received from the optical fiber 6-1 between the plurality of ONU2s and outputs the optical signal to the optical fiber 6-2 between the optical coupler 5-2. .. The optical coupler 5-2 outputs an optical signal for uplink communication received from the optical fiber 6-2 to the optical fiber 6-3 between the optical fiber 6-2 and the OLT 3. Further, the optical coupler 5-2 outputs a downlink communication optical signal received from the optical fiber 6-3 to the optical fiber 6-2. The optical coupler 5-1 branches the optical signal of downlink communication received from the optical fiber 6-2 into the optical fiber 6-1 between each of the plurality of ONUs 2 and outputs the signal. As a result, the PON system 1 relays communication between the customer terminal (not shown) connected under the ONU2 and the host device (not shown) on the network connected to the OLT 3. In the figure, a single optical fiber 6-2 is connected to the ONU side of the optical coupler 5-2, but a plurality of optical fibers 6-2 may be connected, and the optical coupler and the optical fiber may be connected. The number of connections may be increased or decreased as appropriate. For example, the optical fiber 6-3 and the optical coupler 5-1 may be connected except for the optical coupler 5-2 and the optical fiber 6-2.

In the present embodiment, a case where the communication device capable of taking a sleep state is OLT3 will be described as an example. The OLT 3 includes an OSU (Optical Subscriber Unit) 33 and a control unit 31. Although the configuration in which the control unit 31 is provided in the OLT 3 is shown in the figure, it may be provided outside the OLT 3. The outside is, for example, a control system, an ONU, a host device, another OLT3 inside, or a combination thereof. The control unit 31 may be shared by a communication device such as a plurality of OLT3s that can take a sleep state or a communication device other than the communication device. When the control unit 31 is shared, it is easy to suppress the power consumption in the driving state of the shared functional unit (for example, the control unit 31). Further, if the control unit 31 is provided externally, the transition of the entire OLT 3 to the sleep state becomes easy.

The OSU 30 constitutes a communication unit that communicates with another device. The OSU 30 terminates the optical signal. The OSU 30 includes an optical transmission / reception unit 301 and a signal processing unit 302. The optical transmission / reception unit 301 converts the uplink communication optical signal received from the optical fiber network 4 into an electric signal and outputs it to the signal processing unit 302. Further, the optical transmission / reception unit 301 converts the electrical signal of the downlink communication into an optical signal and outputs it to the optical fiber network 4. The signal processing unit 302 converts the frame of the uplink communication signal converted into the electric signal by the optical transmission / reception unit 301 from the PON frame into a desired frame, and outputs the frame to the network connected to the host device. Further, the signal processing unit 302 converts the frame of the downlink communication signal received from the network connected to the host device into a PON frame and outputs the frame to the optical transmission / reception unit 301. The OSU30 itself or a part of its functions may be integrated by a plurality of OSU30s.

The control unit 31 controls each unit. The control unit 31 controls whether the state of the OLT 3 is set to the sleep state or the operating state. When the OSU 30 is put into the sleep state from the operating state, the control unit 31 puts the power supply of a predetermined functional unit included in the OLT 3 or the power supply of the entire OLT 3 into a stopped state. When the predetermined functional unit is stopped, the control unit 31 may control to stop the supply of power to the signal processing unit 302 of the OSU 30, for example, and supply the power to the optical transmission / reception unit 301 of the OSU 30. It may be controlled to stop the supply of power to both of them.

When a part or the whole of a plurality of OSU 30s is integrated, a part or the whole of the OSU 30 to be put into a sleep or operating state may be transitioned, or a part or the whole of the OSU 30 which is integrated. If all should be put to sleep, all of OSU30 may be put into sleep state.

When the power supply of the entire OLT 3 is stopped and the OLT 3 includes the control unit 31, the control unit 31 receives a start instruction from another device, inputs a start instruction by the user, and arrives at predetermined data from the sleep state. , The function required to detect a predetermined condition for transitioning to a driving state such as the elapse of a predetermined time and the detection that a predetermined time has come, and to start the control for transitioning to the driving state is a capacitor or the like. It is possible to operate those functions without supplying power by using the backup battery of. If the OLT 3 does not include the control unit 31 even when the power supply of the entire OLT 3 is stopped, a backup battery or the like for the control unit 31 to transition the OLT 3 to the operating state is unnecessary.

When the OLT 3 transitions from the sleep state to the operating state, the control unit 31 controls the functional unit whose power supply was stopped in the sleep state or the control unit 31 to start the power supply to the entire OLT 3. As a result, the control unit 31 shifts the power supply from the stopped state to the supply state. In this way, the control unit 31 has a function of controlling the state of the power supply of the own device.

Next, the operation of OLT 3 will be described.
When the control unit 31 of the OLT 3 detects a predetermined trigger that should transition to the operating state while the power supply of the predetermined functional unit is in the sleep state, the power supply of the functional unit whose power supply is stopped is activated. To do. The trigger can be arbitrary, such as receiving a start instruction from another device, inputting a start instruction by the user, arrival of predetermined data, elapse of a predetermined time, detection of a predetermined time, etc. Can be.

When the power supply is turned on, the control unit 31 suppresses the normality confirmation process at the time of starting up. From this, the OLT 3 is started without executing the normality confirmation.
Since the present embodiment is started without executing the normality check, it has the effect of shortening the start time as compared with the conventional case.

(Second Embodiment)
The difference between this embodiment and the first embodiment is that the normality confirmation of the non-operating part is suppressed. Hereinafter, the difference from the first embodiment will be described.

The configuration of the PON system of the present embodiment is the same as that of the PON system 1 of the first embodiment shown in FIG. The operation of the OLT 3 is the same as that of the first embodiment except for the following points.
In the present embodiment, the control unit 31 suppresses the normality confirmation process at the time of starting the non-operating portion. As a result, the OLT 3 is started without executing the normality check of the non-operating part. Non-operational parts are memory, FPGA (Field Programmable Gate Array), CPU (central processing unit) cores, wiring, processing function units, etc., and multiple OSU30s that are not or are likely to be in operation in the driven state. It is a resource such as a part related to the OSU30 in which a part or the whole is integrated and the signal is not conducted. These resources do not operate surpluses or spares due to signal immobility or some kind of trouble. The identification of the non-operating part may be determined at the time of manufacturing the communication device or before the transition to the sleep state. For example, the design information or the ratio of the own device or another device that has not been put into operation or has been put into operation in the past one or more driving states may be set to be lower than a predetermined ratio. For example, the design information or the ratio of the own device or another device that has not been put into operation or has been put into operation in the past one or more driving states may be set to be lower than a predetermined ratio.

In the present embodiment, at least one of a storage unit, a determination unit, and a normality confirmation unit may be further provided inside or outside the control unit 31. An example of this configuration is shown in FIG.
It should be noted that any of these additional functions may be provided outside the OLT3, may be shared by a communication device such as a plurality of OLT3s that can take a sleep state, or a communication device other than the communication device, or a capacitor or the like in the sleep state. These functions may be enabled without power supply by using a backup battery or the like.

FIG. 2 is a functional block diagram showing another configuration of the PON system 1a of the present embodiment, and only the functional blocks related to the present embodiment are extracted and shown. In the figure, the same parts as those of the PON system 1 according to the first embodiment shown in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted. The difference between the PON system 1a shown in the figure and the PON system 1 of the first embodiment shown in FIG. 1 is that the PON system 3a is provided instead of the OLT 3. The OLT 3a shows an example in which the storage unit 32 is provided outside the control unit 31, and the determination unit 311 and the normality confirmation unit 312 are provided inside the control unit 31.

The determination unit 311 determines the non-operating portion at at least one of the following timings (1) to (5).
(1) The predetermined time has arrived.
(2) Manufacture or implementation of at least a part of OSU30 or control unit 31 or OLT3, or start of drive or start of signal conduction, or a combination thereof.
(3) From the manufacture or implementation of at least a part of the OSU30 or the control unit 31 or the OLT3, the start of driving, the start of signal conduction, or the previous determination, or a combination thereof, a predetermined time, a predetermined driving time, or a predetermined sleep time. The course of at least one or a combination thereof. The previous judgment is the judgment of the previous non-operational part.
(4) Manufacture or implementation of at least a part of the OSU30 or the control unit 31 or the OLT3, or the start of driving, the start of signal conduction, or any or a combination of the previous determinations, and the transition to the predetermined driving state and the transition to the sleeping state. The number of times of either or a combination thereof. The previous judgment is the judgment of the previous non-operational part.
(5) Before the control unit 31 starts the power supply or shifts to the sleep state.

The normality confirmation unit 312 does not execute the normality confirmation on the portion determined by the determination unit 311 as the non-operating portion, but executes the normality confirmation of other parts.

The storage unit 32 stores various data or determination results used by the determination unit 311 to determine the non-operating portion.

When the control unit 31 starts the power supply, the determination unit 311 uses the data stored in the storage unit 32 or the information obtained based on the data acquired from other devices other than the OLT 3a to be a non-operating part. Judge whether or not. This information, which is used to determine whether or not to confirm the non-operational part, is referred to as judgment information.
The judgment information is, for example, information on the assumed non-operation of OSU30, OLT3a, and the like. The probability of becoming a non-operating portion or a non-operating portion can be obtained from the statistical data stored in the storage unit 32 of the OLT 3a or the statistical data stored in another device. Statistical data shows statistics on design information such as OSU30 or OLT3a, operation information, power consumption information, continuity information, failure information, failure alarm, signals transmitted and received by OLT3, and the like.

For example, the determination unit 311 determines the probability that the non-operating part or each part will be non-operating from the probability that the surplus or spare part or each part will be reserved in advance from the design information. The calculation target of the probability of non-operation may be only the part that may be non-operation. For example, depending on the operation information, the judgment unit 311 may have a non-operational part corresponding to the non-operational OSU30 in a part in which a plurality of OSUs 30 are integrated, or a non-operational part or each part which is a backup system. Determine the probability of non-operation. For example, the determination unit 311 determines the probability that the non-operating part or each part will be non-operating from the other part or the part where the power consumption is smaller than the predetermined value when the power consumption is in the operating state based on the power consumption information. Further, for example, the determination unit 311 determines the probability that the non-operating part or each part will be non-operating from the non-conducting part based on the continuity information. Further, for example, the determination unit 311 determines the probability that the non-operational part or each part will be non-operational from the part with the failure information and the failure alarm. The determination unit 311 determines that the non-operational part obtained from the statistical data or each part has a non-operational probability of a predetermined value or more, the determination unit 311 is a non-operational part.

In the above, the non-operating part is determined by the determination unit 311 of the OLT3, but the OLT3 may be manually set at the time of setting or before the power is stopped. Further, the determination unit 311 may be provided by another device connected to the OLT 3. The normality confirmation unit 312 of the OLT 3 suppresses the normality confirmation of the non-operating portion according to the determination result of the non-operating portion received from the determination unit 311 provided in the other device.

In the present embodiment, since the normality check of the non-operating part is not executed, the startup time is shorter than the case of executing the normality checking of the non-operating part. In addition, there is an effect that the load on the operation system can be reduced due to the operation interruption due to unnecessary start / stop or the issuance of a failure alarm due to an abnormal state such as a failure of a part that is not related to the operation or is unlikely to be related. Furthermore, when checking the normality of the operational part, if the normality of the operational part is lost, there is also the effect of enabling operation in an abnormal state such as a failure of a part related to or likely to be related to the operation. is there.

(Third Embodiment)
Similar to this embodiment and the first embodiment, normality confirmation is suppressed at startup. The difference between this embodiment and the first embodiment is that normality confirmation is performed during operation. Hereinafter, the difference from the first embodiment will be described.

The configuration of the PON system of the present embodiment is the same as that of the PON system 1 of the first embodiment shown in FIG. The operation of the OLT 3 is the same as that of the first embodiment except for the following points.
In the present embodiment, the control unit 31 of the OLT 3 controls to execute the normality check during operation. The normality confirmation may be performed only on the operational part or only on the non-operational part. Further, the control unit 31 appropriately moves the operation part to the non-operation part for which the normality has been confirmed, and the OLT 3 operates at the part for which the normality has been confirmed. For example, suppose that the OLT 3 has a memory A and a memory B, and the memory A is initially in operation and the memory B is not in operation. In this case, the normality of the memory B is confirmed during the operation of the memory A, and then the contents of the memory A are transferred to the memory B and operated in the memory B. Further, the OLT 3 may return the operation part after confirming the normality. For example, suppose that the OLT 3 has a memory A and a memory B, and the memory A is initially in operation and the memory B is not in operation. In this case, the OLT 3 switches to the operation in the memory B, confirms the normality of the memory A, and then returns to the operation in the memory A. In this case, it is not essential to confirm the normality of the memory B. When performing a confirmation method for the operational part that cannot be confirmed for normality during operation, it is desirable to temporarily move the operational part to the non-operational part for confirmation, or to operate in the confirmed non-operational part. The non-operating portion, its determination, the device configuration, and the processing may be the same as those in the second embodiment.

In the present embodiment, since the normality check is not executed at the time of startup, the startup time is shortened. In addition, when checking the normality of the operation part, if the normality of the operation part is lost, the effect of easily suppressing the operation due to an abnormal state such as a failure of a part related to or likely to be related to the operation. There is also.

(Fourth Embodiment)
FIG. 3 is a functional block diagram showing the configuration of the PON system 1b according to the fourth embodiment of the present invention, and only the functional blocks related to the present embodiment are extracted and shown. In the figure, the same reference numerals are given to the same configurations as those of the PON system 1 of the first embodiment shown in FIG. The PON system 1b is a communication system used as an access network. The PON system 1b includes an ONU2 installed in the customer's house and an OLT3 installed in the station building. The OLT 3b and the plurality of ONU2s are connected via the optical fiber network 4.

The optical fiber network 4 is configured by connecting optical fibers with an optical coupler 5-1 and an optical coupler 5-2. The optical coupler 5-1 multiplexes the optical signal of uplink communication received from the optical fiber 6-1 between the plurality of ONU2s and outputs the optical signal to the optical fiber 6-2 between the optical coupler 5-2. .. The optical coupler 5-2 outputs an optical signal for uplink communication received from the optical fiber 6-2 to the optical fiber 6-3 between the optical fiber 6-2 and the OLT 3b. Further, the optical coupler 5-2 outputs a downlink communication optical signal received from the optical fiber 6-3 to the optical fiber 6-2. The optical coupler 5-1 branches the optical signal of downlink communication received from the optical fiber 6-2 into the optical fiber 6-1 between each of the plurality of ONUs 2 and outputs the signal. As a result, the PON system 1b relays the communication between the customer terminal (not shown) connected under the ONU2 and the host device (not shown) on the network connected to the OLT 3b. In the figure, a single optical fiber 6-2 is connected to the ONU side of the optical coupler 5-2, but a plurality of optical fibers 6-2 may be connected, and the optical coupler and the optical fiber may be connected. The number of connections may be increased or decreased as appropriate. For example, the optical fiber 6-3 and the optical coupler 5-1 may be connected except for the optical coupler 5-2 and the optical fiber 6-2.

In the present embodiment, a case where the communication device capable of taking a sleep state is OLT3b will be described as an example. The OLT 3b includes an OSU 30, a control unit 37, and a storage unit 38. In the figure, the configuration in which the control unit 37 and the storage unit 38 are provided in the OLT 3b is shown, but at least one of them may be provided outside the OLT 3b. The outside is, for example, a control system, an ONU, a host device, another OLT3b inside, or a combination thereof. The control unit 37 may be shared by a communication device other than a communication device or a communication device capable of taking a sleep state such as a plurality of OLT3b, at least one of them. When the control unit 37 is shared, it is easy to suppress the power consumption in the driving state of the shared functional unit (for example, one or both of the control unit 37 and the storage unit 38). Further, if the control unit 37 is provided externally, the transition of the entire OLT 3b to the sleep state becomes easy.

The OSU 30 constitutes a communication unit that communicates with other devices. The OSU30 is the same as the OSU30 of the first embodiment shown in FIG.

The control unit 37 controls each unit. The control unit 37 includes a state control unit 371, a determination unit 372, and a normality confirmation unit 373.
The state control unit 371 controls whether the state of the OLT 3b is set to the sleep state or the operating state. When the state control unit 371 puts the OLT 3b from the operating state to the sleep state, the state control unit 371 puts the power supply of the predetermined functional unit included in the OLT 3b or the power supply of the entire OLT 3b into the stopped state.
When the predetermined functional unit is put into the stopped state, the state control unit 371 may control, for example, to stop the supply of power to the signal processing unit 302 of the OSU 30, and the power supply to the optical transmission / reception unit 301 of the OSU 30 may be stopped. It may be controlled to stop the supply, or it may be controlled to stop the supply of power to both of them.

When a part or the whole of the plurality of OSUs 30 is integrated, the state control unit 371 may transition the state of a part or the whole of the OSUs 30 to be in the sleep state or the operating state, or part or the whole. If all of the OSU 30s that are integrated with the system should be put to sleep, all of the OSU 30s may be put into a sleep state.

When the power supply of the entire OLT 3b is stopped and the OLT 3b includes the control unit 37, the control unit 37 receives a start instruction from another device, inputs a start instruction by the user, and arrives at predetermined data from the sleep state. , The function required to detect a predetermined condition for transitioning to a driving state such as the elapse of a predetermined time and the detection that a predetermined time has come, and to start the control for transitioning to the driving state is a capacitor or the like. It is possible to operate those functions without supplying power by using the backup battery of. If the OLT 3b does not include the control unit 37 even when the power supply of the entire OLT 3b is stopped, a backup battery or the like for the control unit 37 to transition the OLT 3b to the operating state is unnecessary.

When the OLT 3b transitions from the sleep state to the operating state, the state control unit 371 controls to start the power supply to the functional unit whose power supply was stopped in the sleep state or the entire OLT 3b. As a result, the state control unit 371 shifts the power supply from the stopped state to the supply state. In this way, the state control unit 371 has a function of controlling the state of the power supply of the own device.

The determination unit 372 determines whether or not it is necessary to confirm the normality when the power is started at at least one of the following timings (1) to (5).
(1) The predetermined time has arrived.
(2) Manufacture or mounting of at least a part of OSU30 or control unit 37 or OLT3b, or start of drive or start of signal conduction, or a combination thereof.
(3) From the manufacture or implementation of at least a part of the OSU30 or the control unit 37 or the OLT3b, the start of driving, the start of signal conduction, or the previous determination, or a combination thereof, a predetermined time, a predetermined driving time, or a predetermined sleep time. The course of at least one or a combination thereof. The previous judgment is a judgment as to whether or not the previous normality confirmation is necessary.
(4) Manufacture or implementation of at least a part of OSU30 or control unit 37 or OLT3b, start of drive, start of signal conduction, or any or combination of the previous determination, transition to a predetermined drive state and transition to a sleep state. The number of times of either or a combination thereof. The previous judgment is a judgment as to whether or not the previous normality confirmation is necessary.
(5) Before the power is activated by the state control unit 371 or the transition to the sleep state.

The normality confirmation unit 373 does not execute the normality confirmation when the determination unit 372 determines that the normality confirmation is unnecessary, and executes the normality confirmation when it is determined that the normality confirmation is necessary. The normality confirmation at the time of turning on the power includes, for example, a memory check and the like, which confirms whether the functional parts (including the functional parts (not shown) to be checked for normality operate normally.

The storage unit 38 stores various data or determination results used by the determination unit 372 to determine the necessity of normality confirmation.

Next, the operation of OLT 3b will be described.
FIG. 4 is a processing flow showing a normality confirmation necessity determination process executed by the OLT 3b when transitioning from the sleep state to the operating state.
When the state control unit 371 of the OLT 3b detects a predetermined trigger that should transition to the operating state while the power supply of the predetermined functional unit is in the sleep state, the power supply of the functional unit whose power supply is stopped is turned on. Start (step S10). The trigger can be arbitrary, such as receiving a start instruction from another device, inputting a start instruction by the user, arrival of predetermined data, elapse of a predetermined time, detection of a predetermined time, etc. Can be.

When the state control unit 371 starts the power supply, the determination unit 372 confirms the normality by using the data stored in the storage unit 38 or the information obtained based on the data acquired from the device other than the OLT 3b. It is determined whether or not to perform (step S20). This information, which is used to judge whether or not to confirm the normality, is referred to as judgment information.
The determination information is, for example, information on the assumed failure probability for OSU30, OLT3b, and the like. The failure probability can be obtained from the statistical data stored in the storage unit 38 of the OLT 3b or the statistical data stored in another device. Statistical data shows statistics on design information such as OSU30 or OLT3b, operation information, power consumption information, continuity information, failure information, failure alarm, and signals transmitted and received by OLT3b.

For example, the determination unit 372 determines a failure or a failure probability from the design information, the frequency of use in the design, and the content of the process. For example, the determination unit 372 determines the failure or failure probability from the operation status corresponding to the OSU 30 being operated in the part where a plurality of OSU 30s are integrated, and the operation status of the spare system and the operation system, based on the operation information. .. For example, the determination unit 372 fails or fails from a part where the cumulative power consumption is higher than other parts or a predetermined value according to the power consumption information, or from the continuation of a period in which no voltage is applied like a certain capacitor. Determine the failure probability. Further, for example, the determination unit 372 determines the failure or failure probability from an increase or decrease in which the power consumption exceeds a predetermined value as compared with the past, or an increase or decrease in which the power consumption is less than a predetermined value as compared with the past. to decide. Further, for example, the determination unit 372 determines from an increase or decrease rate in which the power consumption exceeds a predetermined rate as compared with the past, or from an increase or decrease rate in which the power consumption is lower than a predetermined rate as compared with the past. , Determine the failure or failure probability. Further, for example, the determination unit 372 determines the failure or failure probability based on the continuity information because the continuity per hour or the cumulative continuity is more or less than a predetermined value. Further, for example, the determination unit 372 determines a failure or failure probability by comparing the amount and frequency of failure information and failure alarm with a predetermined value. It should be noted that these may be used in combination, or a model in which the probability of failure continuously increases or decreases may be assumed, or as in the bathtub curve, after a predetermined period of time has passed between the initial stage and the operation. Is large, but the period during that period may be based on a knight model with a probability of failure.

For example, as the information regarding the failure probability, the number of occurrences of frame dropping in which the frame cannot be transmitted or received in the communication unit of OLT3b can be used. When a failure occurs in OLT3b, data cannot be transmitted / received, so frame dropping may occur.
That is, it can be determined that the failure probability is high because the number of frame drops occurs frequently. The determination unit 372 determines that normality confirmation is required when the number of occurrences of frame dropping obtained from the statistical data is equal to or greater than a predetermined number (step S20: YES), and normality confirmation is not required when the number is less than the predetermined number. (Step S20: NO).

Further, as the information regarding the failure probability, the difference between the total band requested from ONU2 and the data band actually conducted (transmitted / received) between OLT3b and ONU2 may be used. As the difference, the ratio of the conducted data band to the total sum of the requested bands may be used. When a failure occurs in OLT3b, data cannot be transmitted / received, so that the band in which data can be actually transmitted / received may be lower than the requested band. That is, it can be determined that the failure probability is high because the difference between the required band and the conducted data band is large. If the difference obtained from the statistical data is greater than or equal to the predetermined value, the determination unit 372 determines that normality confirmation is required (step S20: YES), and if the obtained difference is less than the predetermined value, normality confirmation is unnecessary. Judgment (step S20: NO). Instead of the total band requested by ONU2, the total band allocated by OLT3b corresponding to the band requested by ONU2 may be used.

Further, the storage unit 38 stores the period from the start of operation until the failure probability becomes a predetermined value or more as a normality confirmation unnecessary period. Further, the storage unit 38 stores information on the date and time when the OLT 3b first started operation and the date and time when the OSU 30 was inserted into the OLT 3b. If the operating time from the time when the OLT3b first starts operating or when the OSU30 is inserted into the OLT3b has passed the normality confirmation unnecessary period, the determination unit 372 requires the normality confirmation. It is determined (step S20: YES), and if it has not passed, it is determined that normality confirmation is unnecessary (step S20: NO). The operating time from the time when the OLT3b first starts operating or when the OSU30 is inserted into the OLT3b may be the operating time including the time when the power supply is stopped, and the power supply is stopped. The operating time may be excluding the time spent.

Further, when the power supply is periodically stopped due to sleep, the number of sleeps for which normality confirmation is not required may be registered in advance in the storage unit 38. The number of sleeps for which normality confirmation is not required is obtained by dividing the normality confirmation unnecessary period by the time interval during which sleep is performed. Further, the state control unit 371 writes information indicating the number of times the OLT3b has slept in the storage unit 38. The determination unit 372 determines that normality confirmation is required when the number of sleeps of OLT3b exceeds the number of sleeps for which normality confirmation is unnecessary (step S20: YES), and if it does not exceed, normality confirmation is unnecessary. Judgment (step S20: NO).

When the determination unit 372 determines that the normality confirmation is necessary (step S20: YES), the normality confirmation unit 373 executes the normality confirmation when the power is started (step S30). On the other hand, when the determination unit 372 determines that the normality confirmation is unnecessary (step S20: NO), the normality confirmation unit 373 suppresses the normality confirmation at the time of starting the power supply and does not execute it (step S40).

Further, when the predetermined condition for determining that the failure probability is sufficiently small is satisfied, the determination unit 372 determines that normality confirmation is necessary only immediately after the power is turned on after the power of the entire OLT3b is stopped or immediately after the OSU30 is inserted or removed. May be good. Even if the OLT 3b is operated after the power of the entire OLT 3b is stopped a plurality of times or after the OSU 30 is inserted and removed a plurality of times, the determination unit 372 satisfies the condition for determining that the failure probability is sufficiently small. In this case, it may be determined that normality confirmation is necessary after the power of the entire OLT 3b is stopped a plurality of times or the OSU 30 is inserted and removed a plurality of times.

In the above, the determination unit 372 of the OLT 3b determines whether or not the normality confirmation is necessary for each start-up, but the OLT 3b may be manually set before the power is stopped. Further, the determination unit 372 may be provided by another device connected to the OLT 3b. The normality confirmation unit 373 of the OLT 3b executes or suppresses the normality confirmation according to the determination result of the presence / absence of the normality confirmation received from the determination unit 372 provided in the other device.

(Fifth Embodiment)
The difference between the present embodiment and the fourth embodiment is that the necessity of normality confirmation is determined according to the output result of the function that outputs either of the necessity of normality confirmation. In the present embodiment, the probability function for calculating either the necessity of normality confirmation is not necessarily related to the failure statistical information. Hereinafter, the difference from the fourth embodiment will be described.
The configuration of the PON system of the present embodiment is the same as that of the PON system 1b of the fourth embodiment shown in FIG. The operation of the OLT 3b is the same as that of the fourth embodiment shown in FIG. 4, except for the following points.

In the process of step S20 of FIG. 4, the determination unit 372 determines whether or not the normality confirmation process is necessary depending on whether or not the value of the probability calculation using the probability function is included in the predetermined range instead of the statistical information. The probability that the normality confirmation is required may depend on the probability that the service allows, or may be another predetermined value. This embodiment is suitable when there is not enough statistical information, and may be changed to the processing of the fourth embodiment after the statistical information is accumulated. As the probability calculation, it is desirable to follow a distribution that matches the communication device (OLT3b), but it may be a random number, a pseudo-random number, a uniform distribution, a Gaussian distribution, or any other distribution, and the probability calculation is calculated every time. You may hold the calculation result in advance without doing so.

(Sixth Embodiment)
The difference between the present embodiment and the fourth embodiment is that the necessity of normality confirmation is determined by the probability calculation according to the statistical information instead of the statistical information. In the probability calculation according to the statistical information, the probability that either the necessity of normality confirmation is required changes according to the statistical information. Hereinafter, the difference from the fourth embodiment will be described.
The configuration of the PON system of the present embodiment is the same as that of the PON system 1b of the fourth embodiment shown in FIG. The operation of the OLT 3b is the same as that of the fourth embodiment shown in FIG. 4, except for the following points.
In the process of step S20 of FIG. 4, the determination unit 372 determines the execution and suppression of the normality confirmation process depending on whether or not the value of the probability calculation according to the statistical information is included in the predetermined range instead of the statistical information. For the probability calculation, if the failure probability increases from the statistical information, the probability calculation that has a high probability of performing normality confirmation is used, and if it decreases, the opposite probability calculation is used. The probability calculation to be used may be the same as that of the fifth embodiment, and similarly, the probability calculation may not be calculated each time and the calculation result may be held in advance.

(7th Embodiment)
The difference between the present embodiment and the fourth embodiment is that the necessity of normality confirmation is determined according to the conduction traffic in the vicinity of the power supply stop. Hereinafter, the difference from the fourth embodiment will be described.

The configuration of the PON system of the present embodiment is the same as that of the PON system 1b of the fourth embodiment shown in FIG. The operation of the OLT 3b is the same as that of the fourth embodiment shown in FIG. 4, except for the following points.
In the process of step S20 of FIG. 4, the determination unit 372 is the conduction traffic which is the traffic of the signal transmitted and received by the OLT 3b in the vicinity of the power supply stop, which is the period from the time when the power supply is stopped last to the time retroactive by a predetermined time. Is obtained from the statistical data. The determination unit 372 determines the allowable sleep time based on the conduction traffic in the vicinity of the power stop. The sleep time is the time when communication is stopped. Therefore, for example, when traffic occurs every 5 minutes, the allowable sleep time is set to 5 minutes or a time obtained by subtracting a predetermined time from 5 minutes. If the startup time required by the normality confirmation unit 373 to perform the normality confirmation process does not exceed the allowable sleep time, the determination unit 372 determines that normality confirmation is necessary (step S20: YES), and is normal. The sex confirmation unit 373 executes the normality confirmation when the power is turned on (step S30). On the other hand, if the startup time exceeds the allowable sleep time, the determination unit 372 determines that normality confirmation is unnecessary (step S20: NO), and the normality confirmation unit 373 confirms the normality when the power is started. Suppress execution (step S40).

In addition, instead of or in addition to the conduction traffic in the vicinity of the power stop, the past conduction traffic may be used to determine the sleep time in which the startup time is allowed. As the past conducted traffic used for determining the allowable sleep time, the conducted traffic of the same time zone on the same day of the week can be used.

According to the above-described embodiment, in the communication device (for example, OLT3, 3a, 3b), the communication unit communicates with another device, and the state control unit powers the own device when the own device is in the sleep state. The power of the own device is turned on when the own device goes from the sleep state to the operating state in the stopped state.
When the power supply of the own device is started from the stopped state, the communication device suppresses the normality confirmation process at the time of starting the power supply.
Alternatively, when the power supply of the own device is started from the stopped state, the communication device suppresses the normality confirmation process of the non-operating portion at the time of starting the power supply.
Alternatively, the judgment unit of the communication device determines the failure probability of the own device, the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the normality according to the failure probability. The necessity of confirmation is determined based on at least one of the results of the probability calculation of the necessity of confirmation. As information on the failure probability of the own device, use the probability of failure of the communication unit, the number of frames that could not be transmitted or received by the own device, or the difference between the required band and the band with which the own device communicated. Can be done. In addition, the judgment unit determines whether or not it is necessary to check the normality when the power is started, depending on whether the period during which the own device is operated or the period during which the communication unit is operated exceeds the period until the failure probability exceeds a predetermined value. You may. Alternatively, the determination unit determines the allowable communication stop time (sleep time) based on the past communication traffic of the own device, and the startup time when the normality is confirmed is the allowable communication stop time. Whether or not the normality confirmation is necessary may be determined depending on whether or not the (sleep time) is exceeded. When the power supply is started from the stopped state, the normality confirmation unit of the communication device executes or suppresses the normality confirmation at the time of power startup according to the judgment result by the judgment unit.

As described above, the optical network unit (OLT) has been illustrated as the communication device, but the communication device may be an optical network unit (ONU) or another communication device. When the communication device is an ONU, the same applies if the opposite device is replaced with an OLT from the ONU. Further, the control units 31 and 37 may be provided in the OLT.

Conventional communication devices have the problem that it takes time to check the normality such as memory check and the startup time is long when the power is turned on again after going to sleep to save power and stopping the power. there were. In the present embodiment, since the check performed by the communication device whose power supply is stopped when the power supply is started is suppressed according to the failure probability of the communication device or the traffic, it is possible to shorten the start-up time when the power supply is started.

The control unit 31 of the OLT 3 in the above-described embodiment may be realized by a computer. In that case, the program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by the computer system and executed. The term "computer system" as used herein includes hardware such as an OS and peripheral devices. Further, the "computer-readable recording medium" refers to a portable medium such as a flexible disk, a magneto-optical disk, a ROM, or a CD-ROM, or a storage device such as a hard disk built in a computer system. Further, a "computer-readable recording medium" is a communication line for transmitting a program via a network such as the Internet or a communication line such as a telephone line, and dynamically holds the program for a short period of time. It may also include a program that holds a program for a certain period of time, such as a volatile memory inside a computer system that serves as a server or a client in that case. Further, the above program may be for realizing a part of the above-mentioned functions, and may be further realized for realizing the above-mentioned functions in combination with a program already recorded in the computer system. It may be realized by using a programmable logic device such as FPGA.

Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and includes designs and the like within a range that does not deviate from the gist of the present invention.

It can be used for communication devices that communicate with other devices.

1, 1a, 1b ... PON system 2 ... ONU
3, 3a, 3b ... OLT
4 ... Optical fiber network 5-1, 5-2 ... Optical couplers 6-1, 6-2, 6-3 ... Optical fiber 30 ... OSU
31, 37 ... Control units 32, 38 ... Storage units 311, 372 ... Judgment units 312, 373 ... Normality confirmation unit 301 ... Optical transmission / reception unit 302 ... Signal processing unit 371 ... State control unit

Claims (9)

With the communication unit that communicates with other devices,
And a control unit for controlling the power state of own apparatus,
Before Symbol control unit,
A state control unit that controls the state of the power supply of the own device,
Information on the failure probability of the own device or the parts that make up the own device, information on the communication traffic of the own device, the result of probability calculation of the necessity of normality confirmation, and the necessity of normality confirmation according to the failure probability. A judgment unit that determines the necessity of normality confirmation at power startup based on at least one of the probability calculations of failure, and
It has a normality confirmation unit that executes or suppresses the normality confirmation processing at the time of power startup according to the judgment result by the judgment unit when the power supply of the own device is started from the stopped state.
Wherein said information on component failure probabilities constituting the own device or the device itself, cumulative, no voltage is applied period of power consumption, power consumption, number of frames that could not transmit or receive in its own device, or, A communication device characterized in that it is information on the difference between the required band and the band with which the own device communicates. With the communication unit that communicates with other devices,
And a control unit for controlling the power state of own apparatus,
Before Symbol control unit,
A state control unit that controls the state of the power supply of the own device,
A judgment unit that determines whether or not normality confirmation is necessary when the power is started, depending on whether or not the failure probability based on the own device or the parts constituting the own device exceeds the threshold value .
When the power of the self apparatus is started from a stopped state, the communication device according to claim Rukoto which have a and normality confirmation unit for performing execution or inhibition of normality confirmation process when power is turned in accordance with the result determined by the determination unit .. With the communication unit that communicates with other devices,
And a control unit for controlling the power state of own apparatus,
Before Symbol control unit,
A state control unit that controls the state of the power supply of the own device,
Information on the failure probability of the parts that make up the own device, information on the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the probability calculation of the necessity of normality confirmation according to the failure probability. Based on at least one of the above, a judgment unit that determines the necessity of normality confirmation at power startup, and
It has a normality confirmation unit that executes or suppresses the normality confirmation processing at the time of power startup according to the judgment result by the judgment unit when the power supply of the own device is started from the stopped state.
The determination unit determines the allowable communication stop time based on the past communication traffic of the own device, and whether or not the start-up time when the normality is confirmed exceeds the allowable communication stop time. A communication device characterized in that it determines whether or not it is necessary to confirm the normality when the power is turned on. The control unit turns off the power of the own device when the own device is in the sleep state, and starts the power of the own device when the own device goes from the sleep state to the operating state.
The communication device according to any one of claims 1 to 3, wherein the communication device is characterized by the above. The communication device is either an optical subscriber line termination device or an optical line termination device in a passive optical network.
The communication device according to any one of claims 1 to 4, wherein the communication device is characterized by the above. This is a startup method used for communication devices that communicate with other devices.
The state control process that controls the state of the power supply of the own device ,
Information about the failure probability of the previous SL components of the self apparatus or self apparatus, the self and the information regarding the communication traffic device, result of the probability calculation of the necessity of confirming normality, normality confirmation in response to the failure probability Judgment process to determine the necessity of normality confirmation at power startup based on at least one of the necessity calculation and
When the power supply of the own device is started from the stopped state, the normality confirmation process of executing or suppressing the normality confirmation process at the time of power startup according to the judgment result of the above judgment process, and the normality confirmation process .
Have a,
Wherein said information on component failure probabilities constituting the own device or the device itself, cumulative, no voltage is applied period of power consumption, power consumption, number of frames that could not transmit or receive in its own device, or, An activation method characterized in that it is information on the difference between the requested band and the band with which the own device communicates. This is a startup method used for communication devices that communicate with other devices.
The state control process that controls the state of the power supply of the own device ,
Information about the failure probability of the previous SL components of the self apparatus or self apparatus, the self and the information regarding the communication traffic device, result of the probability calculation of the necessity of confirming normality, normality confirmation in response to the failure probability A judgment process for determining the necessity of normality confirmation at power startup based on at least one of the necessity calculation and
When the power supply of the own device is started from the stopped state, the normality confirmation process of executing or suppressing the normality confirmation process at the time of power startup according to the judgment result of the above judgment process, and the normality confirmation process .
Have a,
In the judgment process, the normality confirmation at the time of power supply is confirmed depending on whether the period during which the own device is operated or the period during which the parts constituting the own device are operated exceeds the period until the failure probability exceeds a predetermined value. A startup method characterized by determining the necessity. This is a startup method used for communication devices that communicate with other devices.
The state control process that controls the state of the power supply of the own device ,
Information on the failure probability of the parts that make up the own device, information on the communication traffic of the own device, the result of the probability calculation of the necessity of normality confirmation, and the probability calculation of the necessity of normality confirmation according to the failure probability. Judgment process to determine the necessity of normality confirmation at power startup based on at least one of
When the power supply of the own device is started from the stopped state, the normality confirmation process of executing or suppressing the normality confirmation process at the time of power startup according to the judgment result of the above judgment process ,
Have a,
In the determination process, whether or not the allowable communication stop time is determined based on the past communication traffic of the own device and the startup time when the normality is confirmed exceeds the allowable communication stop time. A startup method characterized by determining whether or not normality confirmation is required when the power is started. A program for causing a computer used as a communication device that communicates with another device to function as the device according to any one of claims 1 to 5 of the present application.

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