JP6560139B2 - COMMUNICATION DEVICE, STARTUP METHOD, AND PROGRAM - Google Patents

Description

  The present invention relates to a communication device, an activation method, and a program.

  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 includes ONUs (Optical Network Units) installed in customer premises, OLTs (Optical Line Terminals) installed in office buildings, and light that connects multiple ONUs and OLTs. It consists of a fiber network.

  A network device may use a communication device having a sleep function. When a device having a sleep function goes from a start state to a sleep state, the power of the device may be stopped. When the device in the sleep state restarts the power supply, the normality of the device is checked, such as a memory check (see Non-Patent Document 2, for example).

"ITU-T G.989.1", International Telecommunication Union, 2013 "Check the effectiveness of the memory diagnostic tool-an indispensable tool for IT managers?", [Online], IT Media Co., Ltd. [searched on December 16, 2015], Internet <URL: http : //tokkyo.shinsakijun.com/information/newtech.html>

  When the apparatus is restarted after being powered off due to the sleep state, there is a problem that the startup time is long. As described above, the activation time includes a time required for checking the normality of the apparatus at the time of activation, such as a memory check. When the device is a communication device, communication with other devices cannot be performed while the normality is being confirmed, which may cause a communication delay or the like.

  In view of the above-described problems, an object of the present invention is to provide a communication device, an activation method, and a program that can shorten the activation time.

  One aspect of the present invention includes a communication unit that communicates with another device and a control unit that controls a power state of the own device, and the control unit is configured to start up the power source of the own device from a stopped state. The communication device suppresses normality confirmation processing at power-on.

  One aspect of the present invention is the communication device described above, wherein the control unit suppresses normality confirmation processing at the time of power activation of a non-operational part when the power of the own device is activated from a stopped state.

  One aspect of the present invention is the communication device described above, wherein the control unit executes normality confirmation processing after the power supply of the own device is started from a stopped state.

  One aspect of the present invention is the communication device described above, wherein the control unit is related to a state control unit that controls a power state of the own device, information on a failure probability of the own device, and communication traffic of the own device. Necessity of normality confirmation at power-up based on at least one of the information, the result of probability calculation of necessity of normality confirmation, and the probability calculation of necessity of normality confirmation according to failure probability And a normality confirmation unit that executes or suppresses normality confirmation processing at the time of power activation according to the determination result by the determination unit when the power supply of the own apparatus is started from a stopped state.

  One aspect of the present invention is the communication device described above, wherein the information related to the failure probability of the own device includes the probability that the communication unit fails, the number of frames that could not be transmitted or received in the own device, or the request This is information on the difference between the band and the band with which the device communicates.

  One aspect of the present invention is the communication device described above, wherein the determination unit determines whether a period during which the own device is operated or a period during which the communication unit is operated exceeds a predetermined failure probability. Therefore, it is determined whether or not normality confirmation is required at the time of power activation.

  One aspect of the present invention is the communication device described above, wherein the determination unit determines an allowable communication stop time based on traffic of past communication of the own device, and is activated when normality confirmation is performed. Whether or not normality confirmation at the time of power activation is necessary is determined based on whether or not the time exceeds the allowable communication stop time.

  One aspect of the present invention is the communication device described above, wherein the control unit stops the power supply of the own device when the own device is in the sleep state, and the own device enters the operating state from the sleep state. Start up the power of your device.

  One aspect of the present invention is the communication device described above, wherein the communication device 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 a startup method used for a communication device that communicates with another device, a state control process for controlling the power state of the own device, and when the power source of the own device is started from a stopped state. A normality confirmation suppressing process for suppressing normality confirmation processing at power-on.

  One aspect of the present invention is a state control unit that controls a power state of a self-device of a computer used in a communication device that communicates with another device. It is a program for functioning as normality confirmation suppression means for suppressing normality confirmation processing.

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

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

  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. Only functional blocks related to this 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 a customer premises and an OLT (Optical Line Terminal) 3 installed in a office 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 by an optical coupler 5-1 and an optical coupler 5-2. The optical coupler 5-1 multiplexes the optical signal of the uplink communication received from the optical fiber 6-1 with each of the plurality of ONUs 2, and outputs the multiplexed optical signal to the optical fiber 6-2 with the optical coupler 5-2. . The optical coupler 5-2 outputs the upstream communication optical signal received from the optical fiber 6-2 to the optical fiber 6-3 between the OLT 3 and the optical coupler 5-2. The optical coupler 5-2 outputs the optical signal for downlink communication received from the optical fiber 6-3 to the optical fiber 6-2. The optical coupler 5-1 branches and outputs the optical signal for downlink communication received from the optical fiber 6-2 to the optical fiber 6-1 between each of the plurality of ONUs 2. Thereby, the PON system 1 relays communication between a customer terminal (not shown) connected under the control of the ONU 2 and a host device (not shown) on the network connected to the OLT 3. In the figure, a configuration in which a single optical fiber 6-2 is connected to the ONU side of the optical coupler 5-2 is shown, but a plurality of optical fibers 6-2 may be connected. 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 apparatus that can be in the sleep state is OLT 3 will be described as an example. The OLT 3 includes an OSU (Optical Subscriber Unit; optical subscriber line terminating device) 33 and a control unit 31. In the figure, the configuration in which the control unit 31 is provided in the OLT 3 is shown, but the control unit 31 may be provided outside the OLT 3. The external is, for example, a control system, an ONU, a host device, another OLT 3 internal, or a combination thereof. The control unit 31 may be shared by a communication device other than a communication device or a communication device that can take a sleep state, such as a plurality of OLTs 3. When the control unit 31 is shared, it is easy to suppress power consumption in the driving state of the shared function unit (for example, the control unit 31). In addition, when the control unit 31 is provided outside, the entire OLT 3 can easily transition to the sleep state.

  The OSU 30 constitutes a communication unit that performs communication with other devices. 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 an optical signal for uplink communication received from the optical fiber network 4 into an electrical signal and outputs the electrical signal to the signal processing unit 302. The optical transceiver 301 converts the downlink communication electrical signal into an optical signal and outputs the optical signal to the optical fiber network 4. The signal processing unit 302 converts the frame of the uplink communication signal converted into the electrical signal by the optical transmission / reception unit 301 from the PON frame to a desired frame, and outputs the frame to a network connected to the host device. In addition, the signal processing unit 302 converts a frame of a downlink communication signal received from a network connected to the host device into a PON frame and outputs the PON frame to the optical transmission / reception unit 301. Note that the OSU 30 itself or some of its functions may be integrated into a plurality of OSUs 30.

  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 operation state. When the OSU 30 is changed from the operating state to the sleep state, the control unit 31 stops the power supply of a predetermined functional unit included in the OLT 3 or the entire OLT 3. When the predetermined function unit is in a stopped state, for example, the control unit 31 may control to stop the supply of power to the signal processing unit 302 of the OSU 30, or supply of power to the optical transmission / reception unit 301 of the OSU 30. May be controlled to stop, or the supply of power to both of them may be stopped.

  When some or all of the plurality of OSUs 30 are integrated, a part or all of the OSUs 30 that should be in the sleep or operating state may be transitioned, or the OSU 30 that is partly or entirely integrated may be changed. If all should be set to sleep, all of the OSUs 30 may transition to the sleep state.

  When the power supply of the entire OLT 3 is stopped and the control unit 31 is included in the OLT 3, the control unit 31 receives a start instruction from another device, inputs a start instruction by a user, and arrives at predetermined data from the sleep state. Detecting a predetermined condition for transitioning to a driving state such as the detection of the passage of a predetermined time or the detection of a predetermined time, and the function required to start control for transitioning to the driving state is a capacitor or the like These functions can be operated without power supply using a backup battery or the like. If the control unit 31 is not included in the OLT 3 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 performs control so as to start the power supply to the functional unit that is in the stop state or the entire OLT 3 in the sleep state. Thereby, the control part 31 changes a power supply from a stop state to a supply state. As described above, the control unit 31 has a function of controlling the state of the power supply of its own device.

Next, the operation of the OLT 3 will be described.
When the control unit 31 of the OLT 3 is in a sleep state in which the power supply of a predetermined function unit is in a stopped state and detects a predetermined trigger that should be changed to the operation state, the power supply of the function unit in the power supply stop state is activated. To do. Trigger is optional, such as receiving a start instruction from another device, inputting a start instruction by the user, arrival of a predetermined data, elapse of a predetermined time, detection of a predetermined time, etc. It can be.

When the power supply is activated, the control unit 31 suppresses normality confirmation processing at the time of activation. Thus, the OLT 3 starts without executing normality confirmation.
Since the present embodiment is activated without executing normality confirmation, there is an effect that the activation time is shorter than the conventional one.

(Second Embodiment)
The difference between this embodiment and 1st Embodiment exists in the place which suppresses the normality check of a non-operation part. Below, the difference with 1st Embodiment is demonstrated.

The configuration of the PON system of this 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 this embodiment, the control part 31 suppresses the normality confirmation process at the time of starting of a non-operation part. As a result, the OLT 3 starts without executing normality check of the non-operation part. The non-operating part is a memory, an FPGA (Field Programmable Gate Array), a CPU (central processing unit) core, a wiring, a processing function part, etc., or a plurality of OSUs 30 that are not used or frequently operated in a driving state. It is a resource such as a part related to the OSU 30 that is partially or wholly integrated and is not conducting signals. For these resources, for example, surplus and spare are not used due to signal immobility or some trouble. The identification of the non-operating part may be determined when the communication device is manufactured or before the sleep state transition. For example, it may be determined that the design information or the ratio of the apparatus or other apparatus that has not been used or operated in the past one or more drive states is lower than a predetermined ratio. For example, it may be determined that the design information or the ratio of the apparatus or other apparatus that has not been used or operated in the past one or more drive states is lower than a predetermined ratio.

  In the present embodiment, the control unit 31 may further include at least one of a storage unit, a determination unit, and a normality confirmation unit inside or outside the control unit 31. An example of this configuration is shown in FIG. Note that any of these additional functions may be provided outside the OLT 3, or may be shared by a plurality of communication devices other than the communication device such as the OLT 3 or a communication device other than the communication device. These functions may be operable without power supply 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 functional blocks related to the present embodiment are extracted and shown. In this figure, the same parts as those in the PON system 1 according to the first embodiment shown in FIG. 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 an OLT 3a is provided instead of the OLT 3. The OLT 3 a 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 a non-operational part at least at any one of timings (1) to (5) below.
(1) A predetermined time has arrived.
(2) Any or a combination of manufacturing or mounting, driving start, or signal conduction start of at least a part of the OSU 30, the control unit 31, or the OLT 3.
(3) From the manufacturing or mounting of at least a part of the OSU 30 or the control unit 31 or the OLT 3 or the start of driving, the start of signal conduction, the previous determination, or a combination thereof, a predetermined time, a predetermined driving time, or a predetermined sleep time. Progress of at least one or a combination thereof. The previous determination is a determination of the previous non-operational part.
(4) The transition to the predetermined driving state and the transition to the sleep state from the manufacturing or mounting of at least a part of the OSU 30 or the control unit 31 or the OLT 3 or the start of driving, the start of signal conduction, the previous determination, or a combination thereof The number of any or a combination. The previous determination is a determination of the previous non-operational part.
(5) Before the start of the power source by the control unit 31 or the transition to the sleep state.

  The normality confirmation unit 312 does not perform normality confirmation on the portion determined by the determination unit 311 as a non-operational portion, but performs normality confirmation on other portions.

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

When the control unit 31 activates the power supply, the determination unit 311 uses the data stored in the storage unit 32 or data obtained from other devices other than the OLT 3a to determine whether it is a non-operational part. Judge whether or not. This information used for determining whether or not to perform non-operation part confirmation is referred to as determination information.
The determination information is information regarding non-operation assumed for the OSU 30 or the OLT 3a, for example. The probability of becoming a non-operating part or a non-operating part can be obtained from statistical data stored in the storage unit 32 of the OLT 3a or statistical data accumulated in other devices. The statistical data indicates statistics related to design information, operation information, power consumption information, continuity information, failure information, failure alarm, signals transmitted / received by the OLT 3 and the like of the OSU 30 or the OLT 3a.

  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 part or the 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 a portion that may be non-operation. For example, the determination unit 311 determines whether the non-operating part or each part from the non-operating part corresponding to the non-operating OSU 30 or the standby non-operating part according to the operation information, particularly in the part where the plurality of OSUs 30 are integrated. Determine the probability of non-operation. For example, the determination unit 311 determines, based on the power consumption information, the probability that the non-operating part or each part will be non-operating from a part that is less than the predetermined value when the power consumption is in another part or in the operating state. Further, for example, the determination unit 311 determines the probability that the non-operating part or each unit will be non-operating from the non-conductive part based on the continuity 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 part with the failure information or the failure alarm. The determining unit 311 determines that the non-operating part or each part obtained from the statistical data is a non-operating part when the probability of non-operating of each part is a predetermined value or more.

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

  In this embodiment, since the normality check of the non-operation part is not executed, the activation time is shorter than when the normality check of the non-operation part is executed. In addition, there is an effect that it is possible to reduce a load on the operation system due to an operation interruption due to an unnecessary start / stop or a failure alarm issuance due to an abnormal state such as a failure of a portion which is not related to operation or is unlikely to be related. In addition, when checking the normality of the operational part, if the normality of the operational part is lost, there is also an effect that it is possible to operate 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 the present embodiment and the first embodiment, normality confirmation is suppressed at the time of startup. The difference between the present embodiment and the first embodiment is that normality confirmation is performed during operation. Below, the difference with 1st Embodiment is demonstrated.

The configuration of the PON system of this 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 performs control to execute normality confirmation during operation. The normality check may be performed only on the operation part or only on the non-operation part. Further, the control unit 31 appropriately moves the operation part to the non-operation part in which the normality confirmation has been performed, so that the OLT 3 operates in the part in which the normality confirmation has been performed. For example, it is assumed that the OLT 3 has a memory A and a memory B, 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 checked during the operation of the memory A, and then the contents of the memory A are moved to the memory B and operated in the memory B. The OLT 3 may return the operation part after the normality confirmation. For example, it is assumed that the OLT 3 has a memory A and a memory B, 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 with the memory B, checks the normality of the memory A, and then returns to the operation with the memory A. In this case, the normality check of the memory B is not essential. When performing a verification method that does not allow normality confirmation during operation on the operation part, it is desirable to move the operation part to the non-operation part for confirmation, or to operate with the confirmed non-operation part. It should be noted that the non-operational part, its determination, device configuration, and processing may be the same as in the second embodiment.

  In this embodiment, since the normality confirmation is not executed at the time of activation, the activation time is shortened. In addition, when checking the normality of the operation part, if the normality of the operation part is lost, it is easy to deter operation due to abnormal conditions such as failure of the part related to or likely to be related to the operation There is also.

(Fourth embodiment)
FIG. 3 is a functional block diagram showing a configuration of a PON system 1b according to the fourth embodiment of the present invention, and only functional blocks related to the present embodiment are extracted and shown. In the figure, the same reference numerals are given to the same components 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 ONU 2 installed in a customer premises and an OLT 3 installed in a station building. The OLT 3 b 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 by an optical coupler 5-1 and an optical coupler 5-2. The optical coupler 5-1 multiplexes the optical signal of the uplink communication received from the optical fiber 6-1 with each of the plurality of ONUs 2, and outputs the multiplexed optical signal to the optical fiber 6-2 with the optical coupler 5-2. . The optical coupler 5-2 outputs the optical signal for uplink communication received from the optical fiber 6-2 to the optical fiber 6-3 with the OLT 3b. The optical coupler 5-2 outputs the optical signal for downlink communication received from the optical fiber 6-3 to the optical fiber 6-2. The optical coupler 5-1 branches and outputs the optical signal for downlink communication received from the optical fiber 6-2 to the optical fiber 6-1 between each of the plurality of ONUs 2. Thereby, the PON system 1b relays communication between a customer terminal (not shown) connected under the control of the ONU 2 and a host device (not shown) on the network connected to the OLT 3b. In the figure, a configuration in which a single optical fiber 6-2 is connected to the ONU side of the optical coupler 5-2 is shown, but a plurality of optical fibers 6-2 may be connected. 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, an example will be described in which the communication device that can be in the sleep state is the OLT 3b. The OLT 3b includes an OSU 30, a control unit 37, and a storage unit 38. In the figure, a 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 external is, for example, a control system, an ONU, a host device, another OLT 3b, or a combination thereof. The control unit 37 may be shared by at least one of these devices other than a communication device or a communication device that can take a sleep state, such as a plurality of OLTs 3b. When the control unit 37 is shared, it is easy to suppress 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). In addition, when the control unit 37 is provided outside, the entire OLT 3b can easily transition to the sleep state.

  The OSU 30 constitutes a communication unit that performs communication with other devices. The OSU 30 is the same as the OSU 30 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 a sleep state or an operation state. When the OLT 3b is changed from the operating state to the sleep state, the state control unit 371 sets the power supply of a predetermined functional unit included in the OLT 3b or the power supply of the entire OLT 3b to the stop state. When the predetermined function unit is set to the stop state, the state control unit 371 may control the supply of power to the signal processing unit 302 of the OSU 30, for example, and may control the power supply to the optical transmission / reception unit 301 of the OSU 30. You may control to stop supply and you may control to stop supply of the power supply to both.

  When some or all of the plurality of OSUs 30 are integrated, the state control unit 371 may change the state or part of the OSU 30 to be in the sleep state or the operating state, or part or all of When all the OSUs 30 that are integrated with each other should be set to sleep, all of the OSUs 30 may transition to the 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 a user, and arrival of predetermined data from the sleep state. Detecting a predetermined condition for transitioning to a driving state such as the detection of the passage of a predetermined time or the detection of a predetermined time, and the function required to start control for transitioning to the driving state is a capacitor or the like These functions can be operated without power supply using a backup battery or the like. Even when the power supply of the entire OLT 3b is stopped, when the control unit 37 is not included in the OLT 3b, 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 in which the power supply is stopped or the entire OLT 3b in the sleep state. Thereby, the state control part 371 changes a power supply from a stop state to a supply state. As described above, the state control unit 371 has a function of controlling the power state of its own device.

The determination unit 372 determines whether or not it is necessary to check the normality at the time of power activation at at least one of the following timings (1) to (5).
(1) A predetermined time has arrived.
(2) Any or a combination of at least a part of the OSU 30, the control unit 37, or the OLT 3 b, or a drive start or a signal conduction start.
(3) From the manufacturing or mounting of at least a part of the OSU 30 or the control unit 37 or the OLT 3b, the start of driving, the start of signal conduction, the previous determination, or a combination thereof, a predetermined time, a predetermined driving time, or a predetermined sleep time. Progress of at least one or a combination thereof. The previous determination is a determination as to whether or not the previous normality check is necessary.
(4) The transition from the OSU 30 or the control unit 37 or the OLT 3b to the predetermined driving state and the transition to the sleep state from the manufacturing or mounting, the driving start, the signal conduction start, the previous determination, or a combination thereof. The number of any or a combination. The previous determination is a determination as to whether or not the previous normality check is necessary.
(5) Before power activation by the state control unit 371 or transition to the sleep state.

  The normality confirmation unit 373 does not perform normality confirmation when the determination unit 372 determines that normality confirmation is unnecessary, and performs normality confirmation when it is determined that normality confirmation is necessary. The normality check at the time of power activation includes, for example, a check operation to check whether a normal function check target function unit (including a function unit not shown) operates normally, such as a memory check.

  The storage unit 38 stores various data or determination results used by the determination unit 372 to determine whether or not normality confirmation is necessary.

Next, the operation of the OLT 3b will be described.
FIG. 4 is a process flow showing normality confirmation necessity determination processing executed by the OLT 3b when the sleep state transits to the operation state.
When the state control unit 371 of the OLT 3b is in a sleep state in which the power supply of a predetermined function unit is in a stopped state, and detects a predetermined trigger that should be changed to an operation state, the state control unit 371 turns off the power supply of the function unit in the power supply stop state. Start (step S10). Trigger is optional, such as receiving a start instruction from another device, inputting a start instruction by the user, arrival of a predetermined data, elapse of a predetermined time, detection of a predetermined time, etc. It can be.

When the state control unit 371 activates the power supply, the determination unit 372 checks the normality using data stored in the storage unit 38 or information obtained from data acquired from another device other than the OLT 3b. It is determined whether or not to perform (step S20). This information used for determining whether or not to perform normality confirmation is referred to as determination information.
The determination information is information on the failure probability assumed for the OSU 30 or the OLT 3b, for example. The failure probability can be obtained from statistical data stored in the storage unit 38 of the OLT 3b or statistical data stored in another device. The statistical data indicates statistics regarding design information such as OSU 30 or OLT 3b, operation information, power consumption information, continuity information, failure information, failure alarm, and a signal transmitted / received by OLT 3b.

  For example, the determination unit 372 determines a failure or a failure probability from the amount of design use frequency and the content of processing from the design information. For example, the determination unit 372 determines a failure or a failure probability from the operation status corresponding to the OSU 30 currently operating in a portion where a plurality of OSUs 30 are integrated, and the operation status in the standby system and the operation system, based on the operation information. . For example, the determination unit 372 may detect a failure or a failure from a portion where the accumulation of power consumption is higher than other portions or a predetermined value according to the power consumption information, or from a continuation of a period in which no voltage is applied as in some types of capacitors. Determine failure probability. In addition, for example, the determination unit 372 calculates a failure or a failure probability from an increase or decrease in which power consumption exceeds a predetermined value compared to the past, or an increase or decrease in which power consumption falls below a predetermined value compared to the past. to decide. Further, for example, the determination unit 372 may determine whether the power consumption exceeds a predetermined rate compared to the past or an increase rate or decrease rate, or if the power consumption decreases below a predetermined rate compared to the past. Determine failure or failure probability. Further, for example, the determination unit 372 determines a failure or a failure probability from the fact that the continuity per hour or the cumulative continuity is greater or less than a predetermined value based on the continuity information. Further, for example, the determination unit 372 determines a failure or a failure probability from a comparison between failure information and the number and frequency of failure alarms and a predetermined value. These may be used in combination, or may be premised on a model in which the probability of failure increases or decreases continuously, or after a predetermined period of time has elapsed since the beginning and operation, as in the bathtub curve. However, it is possible to assume a knight model in which the probability of failure is in the period in between.

  For example, as the information regarding the failure probability, it is possible to use the number of occurrences of dropped frames that could not be transmitted or received by the communication unit of the OLT 3b. When a failure occurs in the OLT 3b, data cannot be transmitted / received, so that a frame drop may occur. That is, it can be determined that the failure probability is high due to the large number of frame dropping occurrences. The determination unit 372 determines that normality confirmation is necessary when the number of occurrences of frame loss obtained from the statistical data is equal to or greater than the predetermined number (step S20: YES), and normality confirmation is not necessary when the predetermined number is not reached. (Step S20: NO).

  Further, as the information on the failure probability, a difference between the sum of the bands requested from the ONU 2 and the data band actually conducted (transmitted / received) between the OLT 3b and the ONU 2 may be used. As the difference, the ratio of the conducted data band to the sum of the requested bands may be used. When a failure occurs in the OLT 3b, data cannot be transmitted / received, so the bandwidth in which data can actually be transmitted / received may be lower than the requested bandwidth. That is, it can be determined that the failure probability is high because the difference between the requested bandwidth and the conducted data bandwidth is large. The determination unit 372 determines that normality confirmation is necessary when the difference obtained from the statistical data is greater than or equal to a predetermined value (step S20: YES). If the obtained difference is less than the predetermined value, the normality confirmation is not necessary. Judgment is made (step S20: NO). Instead of the total bandwidth requested from the ONU 2, the total bandwidth allocated by the OLT 3 b corresponding to the bandwidth requested from the ONU 2 may be used.

  Further, a period from the start of operation until the failure probability becomes equal to or higher than a predetermined value is stored in the storage unit 38 as a normality confirmation unnecessary period. Furthermore, 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. The determination unit 372 determines that the normality confirmation is necessary when the operation time after the OLT 3b first starts operation or when the operation time from when the OSU 30 is inserted into the OLT 3b has passed the normality confirmation unnecessary period. Judgment is made (step S20: YES), and if it has not elapsed, it is judged that normality confirmation is unnecessary (step S20: NO). The operating time after the OLT 3b starts operating for the first time or when the OSU 30 is inserted into the OLT 3b may be the operating time including the time when the power supply is stopped, and the power supply is stopped. It may be the operating time excluding the time.

  Moreover, when the power supply is periodically stopped for sleep, the number of sleeps that do not require normality may be registered in the storage unit 38 in advance. The number of sleeps that does not require normality confirmation is obtained by dividing the normality confirmation unnecessary period by the time interval at which sleep is performed. In addition, the state control unit 371 writes information indicating the number of times the OLT 3b has gone to sleep in the storage unit 38. The determination unit 372 determines that normality confirmation is necessary if the number of sleeps of the OLT 3b exceeds the number of sleeps that do not require normality confirmation (step S20: YES), and if not, normality confirmation is not necessary. Judgment is made (step S20: NO).

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

  Further, when satisfying a predetermined condition that the failure probability is determined to be sufficiently small, for example, the determination unit 372 determines that the normality check is necessary only after the power supply of the entire OLT 3b is turned off or immediately after the OSU 30 is inserted or removed. Also good. Even if the OLT 3b is operated after the entire power supply of the 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 the normality confirmation is required after the power supply 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 description, whether or not normality confirmation is necessary is determined by the determination unit 372 of the OLT 3b every time it is activated, but may be manually set in the OLT 3b before the power is stopped. Further, the determination unit 372 may be provided in another device connected to the OLT 3b. The normality confirmation unit 373 of the OLT 3b executes or suppresses normality confirmation according to the determination result of the presence / absence of normality confirmation received from the determination unit 372 provided in another 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 one of the necessity of normality confirmation. In the present embodiment, the probability function for calculating whether or not normality confirmation is necessary is not necessarily related to the failure statistical information. Hereinafter, differences from the fourth embodiment will be described.
The configuration of the PON system of this 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 in FIG. 4, the determination unit 372 determines whether or not the normality confirmation process is necessary depending on whether or not the probability calculation value using the probability function is included in a predetermined range instead of the statistical information. The probability that the normality confirmation is required may be in accordance with a probability that is allowed in service, or may be another predetermined value. The present 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, calculation according to a distribution that matches the communication device (OLT3b) is desirable, but random number, pseudo-random number, uniform distribution, Gaussian distribution or other arbitrary distribution may be used, and probability calculation is calculated every time. The calculation result may be held in advance without.

(Sixth embodiment)
The difference between this embodiment and the fourth embodiment is that the necessity of normality confirmation is determined by probability calculation according to statistical information instead of statistical information. In the probability calculation according to the statistical information, the probability that either of the necessity of normality confirmation is required changes according to the statistical information. Hereinafter, differences from the fourth embodiment will be described.
The configuration of the PON system of this 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 in FIG. 4, the determination unit 372 determines whether or not to execute the normality confirmation process depending on whether or not the probability calculation value corresponding to the statistical information is included in a predetermined range instead of the statistical information. The probability calculation uses a probability calculation that has a high probability of performing normality check according to the increase in the failure probability from the statistical information, and a probability calculation that is the opposite when the failure probability decreases. The probability calculation to be used may be the same as in the fifth embodiment. Similarly, the probability calculation may not be calculated every time and the calculation result may be held in advance.

(Seventh embodiment)
The difference between the present embodiment and the fourth embodiment is that the necessity of normality confirmation is determined according to the continuity traffic near the power stop. Hereinafter, differences from the fourth embodiment will be described.

The configuration of the PON system of this 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 in FIG. 4, the determination unit 372 conducts traffic that is traffic of signals transmitted and received by the OLT 3b in the vicinity of the power supply stop, which is a period from the time when the power supply was last stopped to a time that is a predetermined time later. Is obtained from statistical data. The determination unit 372 determines the allowable sleep time based on the conduction traffic near the power stop. The sleep time is a time during which communication is stopped. Therefore, for example, when traffic occurs every 5 minutes, the allowable sleep time is 5 minutes or a time obtained by subtracting a predetermined time from 5 minutes. The determination unit 372 determines that normality confirmation is necessary if the activation time that is obtained by the normality confirmation unit 373 performing the normality confirmation process does not exceed the allowable sleep time (step S20: YES), and normal The property confirmation unit 373 performs normality confirmation at the time of power activation (step S30). On the other hand, when the activation time exceeds the allowable sleep time, the determination unit 372 determines that normality confirmation is not necessary (step S20: NO), and the normality confirmation unit 373 confirms normality when the power is activated. Execution is suppressed (step S40).

  In addition, instead of or in addition to the continuity traffic in the vicinity of the power stop, the sleep time in which the startup time is allowed may be determined using the past continuity traffic. For the past conducted traffic used to determine 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, OLT 3, 3a, 3b), the communication unit communicates with other devices, and the state control unit turns on the power of the own device when the own device is in the sleep state. The power supply of the own device is activated when the own device is changed from the sleep state to the operating state.
The communication apparatus suppresses the normality confirmation process at the time of power activation when the power of the own apparatus is activated from a stopped state.
Alternatively, the communication apparatus suppresses the normality confirmation process for the non-operational part at the time of power activation when the power of the own apparatus is activated from the stopped state.
Alternatively, the determination unit of the communication device may include information on the failure probability of the own device, information on communication traffic of the own device, a result of probability calculation of necessity of normality confirmation, and normality according to the failure probability. Based on at least one of the results of the probability calculation of necessity of confirmation, the necessity of normality confirmation at the time of power activation is determined. As information regarding the failure probability of the own device, use the probability that the communication unit will fail, the number of frames that could not be transmitted or received by the own device, or the difference between the requested bandwidth and the bandwidth with which the own device communicated. Can do. In addition, the determination unit determines whether or not it is necessary to check the normality at the time of starting the power supply depending on whether the period during which the own device is operated or the period during which the communication unit is operated exceeds a predetermined failure probability. May be. Alternatively, the determination unit determines the allowable communication stop time (sleep time) based on the past communication traffic of the own device, and the start time when the normality check is performed is the allowable communication stop time. Whether or not normality confirmation is necessary may be determined based on whether or not (sleep time) is exceeded. The normality confirmation unit of the communication device performs or suppresses normality confirmation at the time of power activation according to the determination result by the determination unit when the power supply is activated from a stopped state.

  As described above, the optical subscriber line termination device (OLT) is exemplified as the communication device. However, the communication device may be an optical line termination device (ONU) or other communication device. If the communication device is an ONU, the same applies if the opposite device is replaced from the ONU to the OLT. Moreover, you may provide the control parts 31 and 37 in OLT.

  The conventional communication device has a problem that it takes a long time to check normality such as a memory check when the power is turned on again after entering the sleep state for power saving and stopping the power. there were. In this embodiment, since the check performed by the communication device that has stopped the power supply when the power supply is started is suppressed according to the failure probability or traffic of the communication device, the start-up time when the power supply is started can be shortened.

  You may make it implement | achieve the control part 31 of OLT3 in embodiment mentioned above with a computer. In that case, a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory inside a computer system serving as a server or a client in that case may be included and a program held for a certain period of time. Further, the program may be a program for realizing a part of the above-described functions, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. It may be realized using a programmable logic device such as an FPGA.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes designs and the like that do not depart from the gist of the present invention.

  The present invention can be used for a communication device that communicates 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 and 37 ... control units 32 and 38 ... storage units 311 and 372 ... determination units 312 and 373 ... normality confirmation unit 301 ... optical transmission and reception unit 302 ... signal processing unit 371 ... state control unit

Claims (9)

A communication unit for communicating with other devices;
A control unit for controlling the power state of the own device,
The control unit suppresses normality confirmation processing at the time of power activation when the power source of the own device is activated from a stopped state,
The controller is
A state control unit for controlling the power state of the own device;
At least of the information on the failure probability of the own device, the information on the communication traffic of the own device, the result of probability calculation of necessity of normality confirmation, and the probability calculation of necessity of normality confirmation according to the failure probability Based on either, a determination unit that determines whether or not normality confirmation is necessary at the time of power activation,
A normality confirmation unit that performs or suppresses normality confirmation processing at the time of power activation according to the determination result by the determination unit when the power supply of the own device is activated from a stopped state;
The information related to the failure probability of the own device includes the operating status, the accumulation of power consumption, the period during which no voltage is applied, the power consumption, the continuity information, the failure information, and the probability that the communication unit will fail due to at least one of the failure alarm, The number of frames that could not be transmitted or received or the difference information between the requested bandwidth and the bandwidth with which the device communicated. A communication unit for communicating with other devices;
A control unit for controlling the power state of the own device,
The control unit suppresses normality confirmation processing at the time of power activation when the power source of the own device is activated from a stopped state,
The controller is
A state control unit for controlling the power state of the own device;
At least of the information on the failure probability of the own device, the information on the communication traffic of the own device, the result of probability calculation of necessity of normality confirmation, and the probability calculation of necessity of normality confirmation according to the failure probability Based on either, a determination unit that determines whether or not normality confirmation is necessary at the time of power activation,
A normality confirmation unit that performs or suppresses normality confirmation processing at the time of power activation according to the determination result by the determination unit when the power supply of the own device is activated from a stopped state;
The determination unit determines whether it is necessary to check the normality at the time of starting the power supply based on whether the period during which the own apparatus is operated or the period during which the communication unit is operated exceeds a period until the failure probability exceeds a predetermined value. A communication device characterized by: A communication unit for communicating with other devices;
A control unit for controlling the power state of the own device,
The control unit suppresses normality confirmation processing at the time of power activation when the power source of the own device is activated from a stopped state,
The controller is
A state control unit for controlling the power state of the own device;
At least of the information on the failure probability of the own device, the information on the communication traffic of the own device, the result of probability calculation of necessity of normality confirmation, and the probability calculation of necessity of normality confirmation according to the failure probability Based on either, a determination unit that determines whether or not normality confirmation is necessary at the time of power activation,
A normality confirmation unit that performs or suppresses normality confirmation processing at the time of power activation according to the determination result by the determination unit when the power supply of the own device is activated from a stopped state
The determination unit determines an allowable communication stop time based on the past communication traffic of the own device, and whether or not the startup time when the normality check is performed exceeds the allowable communication stop time. To determine whether or not normality confirmation is required at the time of power activation. The control unit stops the power supply of the own device when the own device is in a sleep state, and starts the power supply of the own device when the own device is in an operation state from the sleep state.
The communication device according to any one of claims 1 to 3 , wherein the communication device is characterized in that: The communication device is either an optical subscriber line termination device or an optical line termination device in a passive optical network.
The communication apparatus according to any one of claims 1 to 4 , wherein the communication apparatus is characterized in that: An activation method used in a communication device that communicates with another device,
A state control process for controlling the power state of the device itself;
A normality check suppression process that suppresses normality check processing at the time of power supply startup when the power supply of the own device starts from a stopped state,
Have
At least of the information on the failure probability of the own device, the information on the communication traffic of the own device, the result of probability calculation of necessity of normality confirmation, and the probability calculation of necessity of normality confirmation according to the failure probability Based on either, the determination process to determine the necessity of normality check at power-on,
A normality confirmation process for performing or suppressing normality confirmation processing at the time of power activation according to the determination result of the determination process when the power supply of the own device is started from a stopped state;
The information relating to the failure probability of the own device is the operation status, the accumulation of power consumption, the period during which no voltage is applied, the power consumption, the continuity information, the probability of failure of the communication unit due to at least one of the failure information and the failure alarm , An activation method characterized by the number of frames that could not be transmitted or received, or information on the difference between the requested bandwidth and the bandwidth with which the device communicated. An activation method used in a communication device that communicates with another device,
A state control process for controlling the power state of the device itself;
A normality check suppression process that suppresses normality check processing at the time of power supply startup when the power supply of the own device starts from a stopped state,
Have
At least of the information on the failure probability of the own device, the information on the communication traffic of the own device, the result of probability calculation of necessity of normality confirmation, and the probability calculation of necessity of normality confirmation according to the failure probability Based on either, the determination process to determine the necessity of normality check at power-on,
A normality confirmation process for performing or suppressing normality confirmation processing at the time of power activation according to the determination result of the determination process when the power supply of the own device is started from a stopped state;
In the determination process, the normality at the time of starting the power supply depends on whether the period in which the own apparatus is operated or the period in which the communication unit that communicates with another apparatus is operated exceeds the period until the failure probability exceeds a predetermined value. An activation method characterized by determining whether confirmation is necessary. An activation method used in a communication device that communicates with another device,
A state control process for controlling the power state of the device itself;
A normality check suppression process that suppresses normality check processing at the time of power supply startup when the power supply of the own device starts from a stopped state,
Have
At least of the information on the failure probability of the own device, the information on the communication traffic of the own device, the result of probability calculation of necessity of normality confirmation, and the probability calculation of necessity of normality confirmation according to the failure probability Based on either, the determination process to determine the necessity of normality check at power-on,
A normality confirmation process for performing or suppressing normality confirmation processing at the time of power activation according to the determination result of the determination process when the power supply of the own device is started from a stopped state;
In the determination process, the allowable communication stop time is determined based on the past communication traffic of the own device, and whether the start time when the normality confirmation is performed exceeds the allowable communication stop time. By means of this, a start-up method is characterized in that it is determined whether or not normality confirmation is required at the time of power-up. The program for functioning the computer used for the communication apparatus which communicates with another apparatus as an apparatus as described in any one of Claim 1 to 5 of this application.

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