CN103988469B - Communication failure detection device - Google Patents

Abstract

The communication failure detection device of the present invention includes: receive the frame acceptance division (optical connector (702) of frame from ONU2 and upper network, O/E converter section (703) and A/D converter section (704), LAN adapter (705) and main signal process portion (706), temporarily preserve the frame storage unit (710) of frame, frame will be received and send the frame sending part (713) to frame storage unit (710), the Stateful Inspection portion (712) of the State-output alert notification according to the machine and ONU2, the internal state maintaining part (708) of internal state is changed according to the notice comprising alert notification, send the covering treatment judging part (709) stopping sending the instruction of frame to frame sending part (713) according to internal state.

Description

Communication failure detection device

Technical field

The present invention relates to a kind of communication failure detection device, this communication failure detection device is applicable to such as GE-PON (Gigabit Ethernet (registered trade mark)-Passive Optical Network: gigabit Ethernet- EPON) the optical multiplexing communication system such as system, for determining that when breaking down it is former early Cause.

Background technology

As one, the optical fiber such as FTTH (Fiber To The Home: fiber to the home) are accessed service to be supplied to The method of user, there are EPON (PON:Passive Optical Network) mode.

In this PON system, use multiple optical terminal device (ONU:Optical Network Unit, Optical network unit) public device within a domain (OLT:Optical Line Terminal, optical line terminal) and pass The structure on line sending road (optical fiber).Thus, the high speed access service employing optical fiber can be provided at a low price, as The present, ONU is popularized in each family.

It addition, in PON system, by the cpu function portion of ONU, the exception of ONU can be detected. Additionally, at the delivery time of the license obtaining OLT, ONU would indicate that the alarm of this exception, status information are led to Know to OLT.Afterwards, this alarm, status information notify the supervision of OLT via the cpu function portion of OLT Control card.Then, with monitor that controlling TE termination such as () PC that card is connected controls to block by confirming to monitor Information, it is possible to confirm ONU and be in abnormality.

It addition, such as in the PON system disclosed in patent documentation 1, relatively ONU can be utilized closer to this The terminal (specific ONU) of side, ground confirms the state of ONU.Thus, can be when breaking down from ONU mono- Failure cause is known in side, can make the analysis and investigation of failure cause more efficiently.Especially, setting can be made new If the analysis in the case of breaking down during ONU is more efficiently, it is set it is thus possible to shorten the activity duration.

On the other hand, when there is communication failure in the optical fiber such as FTTH access service, at OLT or ONU In, it is likely to be due to receive certain particular frame and become malfunction.In this case, do not confirming In the case of going out this frame, possibly cannot confirm failure cause.

Accordingly, as the method confirming frame interval for PON, there is insertion frame between OLT and ONU and catch The method obtaining (flame capture) device.By utilizing this frame-grab device to confirm received frame, Being able to confirm that sets out delivers to the frame of OLT or ONU.

Prior art literature

Patent documentation

Patent documentation 1

Japanese Patent Laid-Open 2009-27518 publication

Summary of the invention

Invent technical problem to be solved

But, the limited amount of the frame that frame-grab device once can capture.Accordingly, there exist and ask as follows Topic: be difficult to before just breaking down the frame confirming to send in PON interval.

It addition, in order to connect frame trap setting, need to take out the optical fiber being connected with OLT and ONU.Cause This, there is a problem in that: during taking out light, and communication will be switched off.

It addition, existing communication failure detection device in, can detect communication service provider side, The communication of user's house side disconnects.Additionally, as disclosed in Patent Document 1, by user is lived Residence side arranges specific ONU, it is thus possible to the frame received when the state of ONU, exception being detected Form detects, wherein, described specific ONU be only used for determining disconnection that transmission lines connects, from The reception signal of transmission lines.

But, exist and this problem relatively time consuming for specific ONU is set.Even if it addition, only can confirm that lattice Formula, still cannot detect the content of received frame own, therefore exist and possibly cannot determine failure cause Problem.

The present invention is to solve that the problems referred to above are accomplished, its object is to provide a kind of communication failure inspection Surveying device, this communication failure detection device is by when breaking down, it is thus achieved that receive before just breaking down Frame, it is thus possible to promptly determine failure cause.

Solve the technical scheme that technical problem is used

Communication failure detection device involved in the present invention includes: receive the frame of frame from ONU and upper network Acceptance division, temporarily preserve the frame storage unit of frame, frame acceptance division the frame that receives is sent to frame and protect Deposit the frame sending part in portion, the Stateful Inspection portion of State-output alert notification according to the machine and ONU, root Inside shape according to the internal state of the notice change comprising the alert notification from Stateful Inspection portion itself State maintaining part and the internal state according to internal state maintaining part send stopping to frame sending part and send frame Instruction frame stop instruction unit.

It addition, communication failure detection device involved in the present invention includes: receive from OLT and the next terminal The frame acceptance division of frame, the frame storage unit temporarily preserving frame, the frame that will be received by frame acceptance division send Frame sending part to frame storage unit, Stateful Inspection portion, the basis according to the machine output alert notification comprise to come Alert notification from Stateful Inspection portion keeps at the internal state of the internal state of interior notice change itself Portion and the internal state according to described internal state maintaining part send stopping to frame sending part and send frame The frame of instruction stops instruction unit.

Invention effect

According to the present invention, owing to using said structure, therefore can confirm that out the reception before just breaking down Frame, it is thus possible to quantity of information when increasing analyzing failure cause, therefore can make the tune before determining failure cause Look into operation more efficiently.Thus, the time of failure cause of determining can be shortened.

Accompanying drawing explanation

Fig. 1 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 1 The block diagram of the structure of the PON system that OLT is included.

Fig. 2 is the block diagram of the structure representing the cpu function portion shown in Fig. 1.

Fig. 3 is the flow chart of the frame preservation action representing the communication failure detection device shown in Fig. 1.

Fig. 4 is the figure of the state change representing the internal state maintaining part shown in Fig. 1.

Fig. 5 is the flow chart of the state acquisition action representing the communication failure detection device shown in Fig. 1.

Fig. 6 is the flow chart of the frame acquisition action representing the communication failure detection device shown in Fig. 1.

Fig. 7 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 1 The block diagram of the structure of the PON system that ONU is included.

Fig. 8 is the figure of the state change representing the internal state maintaining part shown in Fig. 7.

Fig. 9 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 2 The block diagram of the structure of the PON system that OLT is included.

Figure 10 is the block diagram of the structure representing the cpu function portion shown in Fig. 9.

Figure 11 is the figure of the state change representing the internal state maintaining part shown in Fig. 9.

Figure 12 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 2 The block diagram of the structure of the PON system that ONU is included.

Figure 13 is the figure of the state change representing the internal state maintaining part shown in Figure 12.

Detailed description of the invention

Below, referring to the drawings embodiments of the present invention are described in detail.

Embodiment 1

First, it is shown that the communication failure involved by embodiment 1 is detected device and is applicable to the feelings of OLT1 Condition.Fig. 1 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 1 The block diagram of the structure of the PON system that OLT1 is included.

As it is shown in figure 1, PON system includes: be arranged at the OLT1 of communication service provider, be arranged at use Multiple ONU2a～2n of family house and the beam splitter 3 that OLT1 and each ONU2a～2n is connected. It is connected by optical fiber 4 between OLT1 with beam splitter 3, it addition, between each ONU2a～2n and beam splitter 3 Connected by optical fiber 5a～5n.It addition, OLT1 with TE6 is connected.

If it is additionally, following without distinguishing especially, then by ONU2a～2n and optical fiber 5a～5n referred to as ONU2 and optical fiber 5.

Then, the structure of OLT1 is illustrated.

As it is shown in figure 1, OLT1 includes multiple PON interface card 7a～7n and monitors that controlling card 8 is constituted.This Outward, if without distinguishing especially in Ru Xia, then PON interface card 7a～7n being referred to as PON interface card 7.

PON interface card 7 is transceiving data between ONU2 and upper network.Additionally, following the most only to from The data receiver action of ONU2 and upper network illustrates.This PON interface card 7 includes: in device IF701, optical connector 702, O/E converter section 703, A/D converter section 704, LAN adapter 705, main letter (frame stops for number process portion 706, cpu function portion 707, internal state maintaining part 708, covering treatment judging part Instruction unit) 709 and frame storage unit 710.

In device, IF701 is connected with IF802 in the device described later monitoring control card 8.

Optical connector 702 is connected with beam splitter 3 by optical fiber 4, sends via beam splitter 3 to from ONU2 Frame be received.The frame received by this optical connector 702 is output to O/E converter section 703.

The frame (optical signal) received by optical connector 702 is converted into the signal of telecommunication by O/E converter section 703.Pass through The frame that this O/E converter section 703 is converted into the signal of telecommunication is output to A/D converter section 704.

The frame being converted into the signal of telecommunication (analogue signal) through O/E converter section 703 is converted into by A/D converter section 704 The discernible digital signal in cpu function portion 707.The frame of digital signal it is converted into by this A/D converter section 704 It is output to cpu function portion 707.

LAN adapter 705 is connected with upper network by cable.

The frame come via LAN adapter 705 transmission from upper network is connect by main signal process portion 706 Receive.The frame received by this main signal process portion 706 is output to cpu function portion 707.

Additionally, optical connector 702, O/E converter section 703 and A/D converter section 704, LAN adapter 705 And main signal process portion 706 configuration frame acceptance division.

Each function part of PON interface card 7 is controlled by cpu function portion 707.As in figure 2 it is shown, this CPU Function part 707 includes: control portion 711, Stateful Inspection portion 712 and frame sending part 713.

Main signal process portion 706 is controlled by control portion 711, and to LAN adapter 705 and upper network Connection status be controlled.

The state of PON interface card 7 and each ONU2 is monitored by Stateful Inspection portion 712, and according to this State, exports alert notification to internal state maintaining part 708.It addition, from monitoring that control card 8 is via dress Put interior IF701 receive status request notice in the case of, make the state answer notification warp of the above-mentioned state of expression By IF701 output in device to monitoring control card 8.

Frame sending part 713 identifies from A/D converter section 704 and the frame in main signal process portion 706, should Frame sends to frame storage unit 710.It addition, receiving frame expiry notification from covering treatment judging part 709 In the case of, stop sending frame to frame storage unit 710.

Additionally, cpu function portion 707 from monitor control card 8 via device in IF701 to receive frame request logical In the case of knowing, this notice is exported to frame storage unit 710.

Internal state maintaining part 708 is according to the alert notification from Stateful Inspection portion 712 and from monitoring control The internal state change notice in portion 803 processed, changes the internal state of itself.

The internal state of internal state maintaining part 708 is confirmed by covering treatment judging part 709 at any time, root Exporting frame expiry notification to frame sending part 713 according to this internal state, this frame expiry notification is used for indicating stopping Frame is sent to frame storage unit 710.

Frame storage unit 710 temporarily preserves the frame from frame sending part 713 continuously (by covering).Separately Outward, in the case of receiving frame request notice from cpu function portion 707, by the frame that preserved via CPU In function part 707 and device, IF701 output is to monitoring control card 8.

It addition, monitor that controlling card 8 monitors the state of each PON interface card 7.This supervision control card 8 by In LAN adapter 801, device, IF802 and supervision control portion 803 are constituted.

LAN adapter 801 is connected with TE6 by cable.

In device, IF802 is connected with IF701 in the device of each PON interface card 7.

Monitor that the state of each PON interface card 7 is monitored by control portion 803.This supervision control portion 803 from In the case of TE6 receives status request notice via LAN adapter 801, make this notice via in device IF802 sends to this PON interface card 7.Then, in from this PON interface card 7 via device, IF802 receives In the case of state answer notification, this notice is made to export to TE6 via LAN adapter 801.

It addition, monitor that control portion 803 makes frame request notice export to this PON interface via IF802 in device Card 7, receives frame from this PON interface card 7 via IF802 in device.

Additionally, it is various logical to monitor that the control portion 803 internal state maintaining part 708 also to PON interface card 7 exports Know (internal state change notice, triggering Notification of Changes etc.).

It follows that the action to communication failure as constructed as above detection device illustrates.

First, with reference to Fig. 3, the frame preservation action to communication failure detection device illustrates.

As it is shown on figure 3, in the frame preservation action of communication failure detection device, first, come frame acceptance division Receive frame (step ST31).It is to say, the frame come from ONU2 transmission is connect by optical connector 702 Receive.Then, this frame is converted into the signal of telecommunication by O/E converter section 703, and this signal of telecommunication is turned by A/D converter section 704 Change the discernible digital signal in cpu function portion 707 into.It addition, main signal process portion 706 receives from upper Network sends the frame of coming.

Then, the frame from frame acceptance division is sent to frame preservation by the frame sending part 713 in cpu function portion 707 Portion 710 (step ST32).

Then, frame storage unit 710 temporarily preserves the frame (step ST33) from frame sending part 713.

On the other hand, the internal state of internal state maintaining part 708 is entered by covering treatment judging part 709 at any time Row confirms, exports frame expiry notification to frame sending part 713 according to this internal state, and this frame expiry notification is used Stop sending frame (step ST34) to frame storage unit 710 in instruction.

Then, frame sending part 713 stops to frame according to the frame expiry notification from covering treatment judging part 709 Storage unit 710 sends frame (step ST35).

Herein, with reference to Fig. 4, the state change to internal state maintaining part 708 illustrates.

In Fig. 4, in the case of internal state maintaining part 708 is in state A, covering treatment judging part 709 Not to frame sending part 713 output frame expiry notification, it is in the situation of state B in internal state maintaining part 708 Under, covering treatment judging part 709 is to frame sending part 713 output frame expiry notification.

Herein, the triggering a1 that internal state maintaining part 708 is changed to state B from state A is from monitoring control The internal state change notice in portion 803 processed or the specific alert notification from Stateful Inspection portion 712.

It addition, in the alert notification from Stateful Inspection portion 712, such as can be by PON interface card 7 Multiple alarms such as the communication disconnection between fault and PON interface card 7 and arbitrary ONU2 are as triggering A1, it is also possible to only using single alarm (communication of such as ONU2 disconnects) as triggering a1.

It addition, which alarm is set by internal state maintaining part 708 in advance as triggering a1.This setting Can be by changing from the triggering Notification of Changes monitoring control portion 803.

On the other hand, only the triggering b1 that internal state maintaining part 708 is changing into state A from state B is set to From the internal state change notice monitoring control portion 803.

Thus, even if PON interface card 7 resets, return to original state, in being still avoided that frame maintaining part 710 Frame data be initialised.

Then, with reference to Fig. 5, the state acquisition action to communication failure detection device illustrates.

As it is shown in figure 5, in the state acquisition action of communication failure detection device, first, by TE6 to prison Send the status request about PON interface card 7 and/or ONU2 depending on control portion 803 to notify.Then, monitor Status request from TE6 is notified that output is to cpu function portion 707 (step ST51) by control portion 803.

Then, the Stateful Inspection portion 712 in cpu function portion 707 would indicate that correspondence according to this status request notice The state answer notification output of the state of PON interface card 7 and/or ONU2 is to monitoring control portion 803.So After, monitor that the state answer notification from cpu function portion 707 is exported to TE6 (step by control portion 803 ST52)。

Then, with reference to Fig. 6, the frame acquisition action to communication failure detection device illustrates.

As shown in Figure 6, in the frame acquisition action of communication failure detection device, first, by monitoring control portion 803 pairs of cpu function portions 707 send frame request notice.Then, cpu function portion 707 will be from monitoring control The frame request notice output in portion 803 is to frame maintaining part 710 (step ST61).

Then, the frame output preserved extremely is monitored control portion according to this frame request notice by frame storage unit 710 803 (steps ST62).

Thus, in the case of there is communication failure, can detect and be connect by OLT1 before just there is communication failure The all frames received.

Then, it is shown that the communication failure involved by embodiment 1 is detected device and is applicable to the feelings of ONU2 Condition.Fig. 7 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 1 The block diagram of the structure of the PON system that ONU2 is included.

PON system shown in Fig. 7 deletes TE6 from the PON system shown in Fig. 1, is connected by TE9a～9n In each ONU2a～2n.If distinguishing additionally, following without special, then TE9a～9n is referred to as TE9.

Then, the structure of ONU2 is illustrated.

ONU2 is transceiving data between OLT1 and TE9.Additionally, it is following only to from OLT1's and TE9 Data receiver action illustrates.As it is shown in fig. 7, this ONU2 includes: optical connector 201, O/E change Portion 202, A/D converter section 203, LAN adapter 204, main signal process portion 205, cpu function portion 206, internal state maintaining part 207, covering treatment judging part 208 and frame storage unit 209.

Optical connector 201 is connected with beam splitter 3 by optical fiber 5, to come via beam splitter 3 transmission from OLT1 Frame is received.The frame received by this optical connector 201 is output to O/E converter section 202.

The frame (optical signal) received by optical connector 201 is converted into the signal of telecommunication by O/E converter section 202.Pass through Frame after this O/E converter section 202 is converted into the conversion of the signal of telecommunication is output to A/D converter section 203.

The frame being converted into the signal of telecommunication (analogue signal) through O/E converter section 202 is converted into by A/D converter section 203 The discernible digital signal in cpu function portion 206.The frame of digital signal it is converted into by this A/D converter section 203 It is output to cpu function portion 206.

LAN adapter 204 is connected with TE9 by cable.

The frame come via LAN adapter 204 transmission from TE9 is received by main signal process portion 205.Logical Cross the frame that this main signal process portion 205 receives and be output to cpu function portion 206.

Additionally, optical connector 201, O/E converter section 202 and A/D converter section 203, LAN adapter 204 And main signal process portion 205 configuration frame acceptance division.

Each function part of ONU2 is controlled by cpu function portion 206.Although not shown, but this cpu function Portion 206 is identical with the cpu function portion 707 shown in Fig. 2, including: control portion 210, Stateful Inspection portion 211 with And frame sending part 212.

Main signal process portion 205 is controlled by control portion 210, and the company to LAN adapter 204 with TE9 The state of connecing is controlled.

The state of ONU2 is monitored by Stateful Inspection portion 211, and according to this state, protects internal state Hold portion 207 and export alert notification.It addition, receiving status request notice from OLT1 via beam splitter 3 In the case of, make the state answer notification of the above-mentioned state of expression export to OLT1 via beam splitter 3.

Frame from A/D converter section 203 and main signal process portion 205 is sent to frame guarantor by frame sending part 212 Deposit portion 209.It addition, in the case of receiving frame expiry notification from covering treatment judging part 208, stop Frame is sent to frame storage unit 209.

Additionally, cpu function portion 206 is in the situation receiving frame request notice from OLT1 via beam splitter 3 Under, this notice is exported to frame storage unit 209.

Internal state maintaining part 207 is according to the alert notification from Stateful Inspection portion 211 and from OLT1's Internal state change notifies, changes the internal state of itself.

The internal state of internal state maintaining part 207 is confirmed by covering treatment judging part 208 at any time, root Exporting frame expiry notification to frame sending part 212 according to this internal state, this frame expiry notification is used for indicating stopping Frame is sent to frame storage unit 209.

Frame storage unit 209 temporarily preserves the frame from frame sending part 212 continuously (by covering).Separately Outward, in the case of receiving frame request notice from cpu function portion 206, by the frame that preserved via CPU Function part 206 exports to OLT1.

It follows that the action to communication failure as constructed as above detection device illustrates.Additionally, will be logical Action when letter failure detector is applicable to ONU2 is also identical, below with action when being applicable to OLT1 Illustrate with reference to Fig. 3,5,6.

First, the frame preservation action to communication failure detection device illustrates.

As it is shown on figure 3, in the frame preservation action of communication failure detection device, first, come frame acceptance division Receive the frame (step ST31) from OLT1.It is to say, optical connector 201 is to from OLT1 transmission Frame is received.Then, frame is converted into the signal of telecommunication by O/E converter section 202, and A/D converter section 203 is by this electricity Signal is converted into the discernible digital signal in cpu function portion 206.It addition, main signal process portion 205 receives The frame of coming is sent from TE9.

Then, the frame from frame acceptance division is sent to frame preservation by the frame sending part 212 in cpu function portion 206 Portion 209 (step ST32).

Then, frame storage unit 209 temporarily preserves the frame (step ST33) from frame sending part 212.

On the other hand, the internal state of internal state maintaining part 207 is entered by covering treatment judging part 208 at any time Row confirms, exports frame expiry notification to frame sending part 212 according to this internal state, and this frame expiry notification is used Stop sending frame to frame storage unit 209 in instruction.

Then, frame sending part 212 stops to frame according to the frame expiry notification from covering treatment judging part 208 Storage unit 209 sends frame (step ST35).

Herein, with reference to Fig. 8, the state change to internal state maintaining part 207 illustrates.

In Fig. 8, in the case of internal state maintaining part 207 is in state C, covering treatment judging part 208 Not to frame sending part 212 output frame expiry notification, it is in the situation of state D in internal state maintaining part 207 Under, covering treatment judging part 208 is to frame sending part 212 output frame expiry notification.

Herein, internal state maintaining part 207 is changed to the triggering c1 of state D from OLT1 from state C Internal state change notice or the specific alert notification from Stateful Inspection portion 211.

It addition, in the alert notification from Stateful Inspection portion 211, such as can by the fault of ONU2 with And multiple alarms such as the communication disconnection between OLT1 and ONU2 are as triggering c1, it is also possible to only by single Alarm (communication of such as ONU2 disconnects) is as triggering c1.

It addition, which alarm is set by internal state maintaining part 207 in advance as triggering c1.This setting Can be changed by the triggering Notification of Changes from OLT1.

On the other hand, only the triggering d1 that internal state maintaining part 207 is changing into state C from state D is set to Internal state change from OLT1 notifies.

Thus, even if ONU2 resets, return to original state, be still avoided that the frame number in frame maintaining part 209 According to being initialised.

It follows that the state acquisition action to communication failure detection device illustrates.

As it is shown in figure 5, in the state acquisition action of communication failure detection device, first, by OLT1 pair Cpu function portion 206 sends the status request about ONU2 and notifies.

Then, according to this status request, cpu function portion 206 notifies that the state that would indicate that the state of ONU2 should Answer notice to export to OLT1 (step ST52).

It follows that the frame acquisition action to communication failure detection device illustrates.

As shown in Figure 6, in the frame acquisition action of communication failure detection device, first, by OLT1 pair Cpu function portion 206 sends frame request notice.Then, the frame from OLT1 is asked by cpu function portion 206 Notice output frame maintaining part 209 (step ST61).

Then, the frame preserved is exported to OLT1 (step by frame storage unit 209 according to this frame request notice ST62)。

Thus, occurring in the case of communication failure, can detect and just occur before communication failure by ONU2 The all frames received.

Additionally, Fig. 1 showing, the communication failure of the present invention is detected device is applicable to the situation of OLT1, Fig. 7 showing, the communication failure of the present invention is detected device is applicable to the situation of ONU2 but it also may point Communication failure is not detected device and be applicable to OLT1 and ONU2.

As it has been described above, according to present embodiment 1, it was configured to before just notifying specific alarm etc. to preserve point The frame not received by PON interface card 7/ONU2, therefore can confirm that out after breaking down and has just broken down Before the frame that receives.As a result of which it is, the operation produced when can make analyzing failure cause is more efficiently, thus The time finding out failure cause can be shortened.

Embodiment 2

First, it is shown that the communication failure involved by embodiment 2 is detected device and is applicable to the feelings of OLT1 Condition.Fig. 9 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 2 The block diagram of the structure of the PON system that OLT1 is included, Figure 10 is the structure representing cpu function portion 707 Block diagram.Fig. 9, the PON system involved by embodiment 2 shown in 10 are Fig. 1, the embodiment party shown in 2 On the basis of PON system involved by formula 1, with the addition of reception frame timing portion 714 and timing instruction unit 715.Other structure is identical, marks identical label and omits the description.

Receive frame timing portion 714 from timing instruction unit 715 receive timing start notice in the case of, open Beginning timing, after the time set in advance, exports timing end notification to timing instruction unit 715. Additionally, in the period starting to terminate to timing from timing, again receiving timing from timing instruction unit 715 In the case of starting notice, reset timer, restart timing.It addition, the timing time energy set By changing from the timing Notification of Changes monitoring control portion 803.

Timing instruction unit 715 from main signal process portion 706, A/D converter section 704 or monitor control portion 803 Receive in the case of there is the frame of specific frame format or frame structure, timing is started notice output to connecing Receive frame timing portion 714.It addition, in the situation receiving timing end notification from reception frame timing portion 714 Under, by internal state change notice output to internal state maintaining part 708.

Then, with reference to Figure 11, the state change to internal state maintaining part 708 illustrates.

In Figure 11, in the case of internal state maintaining part 708 is in state E, covering treatment judging part 709 Not to frame sending part 713 output frame expiry notification, it is in the situation of state F in internal state maintaining part 708 Under, covering treatment judging part 709 is to frame sending part 713 output frame expiry notification.

Herein, the triggering e1 that internal state maintaining part 708 is changed to state F from state E is from monitoring control The internal state change notice in portion 803 or the specific alert notification or interior from cpu function portion 707 Portion's status change notification.

On the other hand, only it is set to come by the triggering f1 that internal state maintaining part 708 is changing into state E from state F From the internal state change notice monitoring control portion 803.

Thus, even if PON interface card 7 resets, return to original state, in being still avoided that frame maintaining part 710 Frame data be initialised.

Other action is identical with embodiment 1, omits the description.

Then, it is shown that the communication failure involved by embodiment 2 is detected device and is applicable to the feelings of ONU2 Condition.Figure 12 is to represent to be suitable for the communication failure detection device involved by embodiments of the present invention 2 The block diagram of the structure of the PON system that ONU2 is included.Involved by embodiment 2 shown in Figure 12 PON system, on the basis of the PON system involved by the embodiment 1 shown in Fig. 7, with the addition of reception frame Timing unit 213.It addition, although not shown, but identical, at cpu function with the cpu function portion 707 of Figure 10 Portion 206 with the addition of timing instruction unit 214.Other structure is identical, marks identical label and omits the description.

Receive frame timing device 213 from timing instruction unit 214 receive timing start notice in the case of, open Beginning timing, after the time set in advance, exports timing end notification to timing instruction unit 214. Additionally, in the period starting to terminate to timing from timing from the beginning of timing instruction unit 214 receives timing again In the case of notice, reset timer, start again at timing.It addition, the timing time set can pass through Timing Notification of Changes from OLT1 changes.

Timing instruction unit 214 receive from main signal process portion 205 or A/D converter section 203 have specific In the case of the frame of frame format or frame structure, timing is started notice output to receiving frame timing portion 213.Separately Outward, in the case of receiving timing end notification from reception frame timing portion 213, internal state change is led to Know that output is to internal state maintaining part 207.

Then, with reference to Figure 13, the state change to internal state maintaining part 207 illustrates.

In Figure 13, in the case of internal state maintaining part 207 is in state G, covering treatment judging part 208, not to frame sending part 212 output frame expiry notification, are in the feelings of state H in internal state maintaining part 207 Under condition, covering treatment judging part 208 is to frame sending part 212 output frame expiry notification.

Herein, internal state maintaining part 207 is changed to the triggering g1 of state H from OLT1 from state G Internal state change notice or specific alert notification or internal state from cpu function portion 206 become Change notice.

On the other hand, only the triggering h1 that internal state maintaining part 207 is changing into state G from state H is set to Internal state change from OLT1 notifies.

Thus, even if ONU2 resets, return to original state, be still avoided that the frame number in frame maintaining part 209 According to being initialised.

Identical with embodiment 1 in addition, omit the description.

As it has been described above, according to present embodiment 2, it is configured to receive there is specific frame format or frame structure Frame after during the stipulated time, preserve the frame received respectively by PON interface card 7/ONU2, therefore exist When fault determines failure cause after occurring, can confirm that out and receive the frame received after particular frame, thus The operation of generation during analyzing failure cause can be made more efficiently, to shorten the time finding out failure cause.

Additionally, the present application can carry out independent assortment to each embodiment in the range of this invention, Or each embodiment is formed arbitrarily key element deforms or in each embodiment, omit arbitrary structure Become key element.

Industrial practicality

Communication failure detection device involved in the present invention by confirming the reception frame before just breaking down, It is thus possible to shorten the time determining failure cause, it is adaptable to the communication event used in optical multiplex communication system Barrier detection device etc..

Label declaration

1OLT, 2,2a～2n ONU, 3 beam splitters, 4,5,5a～5n optical fiber, 6,9,9a～9n TE, 7,7a～7n PON interface card, 8 supervision control card, 201,702 optical connectors, 202,703O/E conversion Portion, 203,704A/D converter section, 204,705,801LAN adapter, 205,706 main signal process portions, 206,707CPU function part, 207,708 internal state maintaining parts, 208,709 covering treatment judging parts, 209,710 frame storage units, 210,711 control portions, 211,712 Stateful Inspection portions, 212,713 frames send Portion, 213,714 receive IF in frame timing portion, 214,715 timing instruction units, 701,802 devices, 803 Monitor control portion.

Claims (6)

1. a communication failure detection device, it is adaptable to and the public affairs communicated between multiple optical terminal device By device within a domain, including:

The frame acceptance division of frame is received from described optical terminal device and upper network；

Temporarily preserve the frame storage unit of frame；

The frame received by described frame acceptance division is sent the frame sending part to described frame storage unit；

According to described public device within a domain and the state of the State-output alert notification of described optical terminal device Monitoring unit；

According to the internal state maintaining part of internal state of notice change itself, described notice comprises from The alert notification in described Stateful Inspection portion；And

Internal state according to described internal state maintaining part sends to described frame sending part and stops sending frame The frame of instruction stops instruction unit.

2. communication failure detection device as claimed in claim 1, it is characterised in that

Described frame storage unit is according to the frame preserved from outside request output.

3. communication failure detection device as claimed in claim 1, it is characterised in that including:

Receiving frame timing portion, this reception frame timing portion starts timing according to from outside notice, is passing through After stipulated time, export timing end notification；And

Timing instruction unit, this timing instruction unit is from described optical terminal device, described upper network or outside In the case of terminal receives the frame with specific frame format or frame structure, timing is started notice output To described reception frame timing portion, in the case of receiving timing end notification from this reception frame timing portion, By internal state change notice output to described internal state maintaining part,

Described internal state maintaining part notifies to change according to the internal state change from described timing instruction unit The internal state of change itself.

4. a communication failure detection device, it is adaptable to and the light communicated between public device within a domain is eventually End device, including:

The frame acceptance division of frame is received from described public device within a domain and the next terminal；

Temporarily preserve the frame storage unit of frame；

The frame received by described frame acceptance division is sent the frame sending part to described frame storage unit；

The Stateful Inspection portion of the State-output alert notification according to described optical terminal device；

According to the internal state maintaining part of internal state of notice change itself, described notice comprises from The alert notification in Stateful Inspection portion；And

Internal state according to described internal state maintaining part sends to described frame sending part and stops sending frame The frame of instruction stops instruction unit.

5. communication failure detection device as claimed in claim 4, it is characterised in that

Described frame storage unit is according to the frame preserved from outside request output.

6. communication failure detection device as claimed in claim 4, it is characterised in that including:

Receiving frame timing portion, this reception frame timing portion starts timing according to from outside notice, is passing through After stipulated time, export timing end notification；And

Timing instruction unit, this timing instruction unit is receiving from described public device within a domain or described the next terminal In the case of there is the frame of specific frame format or frame structure, timing is started notice output to described in connect Receive frame timing portion, in the case of receiving timing end notification from this reception frame timing portion, by inside shape State change notification output extremely described internal state maintaining part,

Described internal state maintaining part notifies to change according to the internal state change from described timing instruction unit The internal state of change itself.