WO2006030499A1

WO2006030499A1 - Network interface apparatus, system arrangement control apparatus, and digital subscriber line access multiplexing apparatus

Info

Publication number: WO2006030499A1
Application number: PCT/JP2004/013436
Authority: WO
Inventors: Hiroshi Suda
Original assignee: Fujitsu Access Limited
Priority date: 2004-09-15
Filing date: 2004-09-15
Publication date: 2006-03-23
Also published as: JPWO2006030499A1

Abstract

The present invention relates to a network interface apparatus for use in a switching center accommodating digital subscriber lines (DSL); a system arrangement control apparatus for performing system arrangements for current use, future use and the like in the network interface apparatus; and to a digital subscriber line multiplexing apparatus, such as DSLAM (40), wherein a plurality of network interface apparatuses as described above are used in accordance with the system arrangement control apparatus. The system arrangement can be updated at a higher speed with reliability at a lost without need to change the basic structure. The network interface apparatus comprises storage means for storing information, such as a fast retrain profile, that is externally notified and applicable for shortening the time required to start up the network interface apparatus; and control means for starting up it based on the stored information when the control means is externally designated.

Description

Specification

Network interface device, system configuration control device, and digital subscriber line access multiplexing device

Technical field

[0001] The present invention is used in an interface between individual digital subscriber lines and a backbone network in an exchange that accommodates subscribers via subscriber lines shared as digital subscriber lines. A network interface device arranged redundantly, a system configuration device that performs system configuration of these network interface devices, and a digital subscription configured by including a plurality of the network interface devices described above together with the system configuration device This relates to a line multiplexing device.

Background art

In recent years, in order to provide many subscriber line exchanges with a high-speed data communication service by sharing a subscriber line as a digital subscriber line, a large number of digital subscriber lines are provided. Digital Subscriber Line Access Multiplexer (DSLAM) that provides a parallel interface between the network and the backbone network!

[0003] FIG. 8 is a diagram showing a configuration example of facilities in a home and a telephone station that realize provision of a data communication service via a digital subscriber line.

In the figure, the facilities provided in the subscriber's premises 10-1-10-n are connected to the telephone station 30 via the subscriber lines 21-1-21-n, respectively. Connected to ark 50.

[0004] Among the subscribers' homes 10-1 to 10-n, for example, the equipment provided in the home 10-1 is composed of the following elements.

• Splitter that terminates one end of subscriber line 21-1 1 卜 1

• Telephone 12-1 connected to one terminal of splitter 11-1

• ADSL module connected to the other terminal of the splitter 11-1 (hereinafter referred to as the “high-frequency terminal”). • Personal computer (PC) 14-1 connected to the digital port of ADSL modem 13-1

Note that the configuration of the facilities in the home 10-2-10-n is the same as that in the home 10-1, so the description and illustration thereof are omitted here.

The telephone station 30 includes the following elements.

• Splitter 31-1—31- having one terminal connected to the corresponding line circuit of the subscriber line not shown and individually connected to the other end of the subscriber line 21-1-21-n n

• Splitter 31-1—Digital subscriber line access multiplexer (DSLAM) connected to the other terminal of 31-n (hereinafter referred to as “high band terminal”) 40

• Splitter 3 provided in digital subscriber line access multiplexer 40 and described above.

1-1 One Multiplexer connected to the first to nth “line terminals” individually corresponding to 31-n high-frequency terminals and the (n + 1) “line terminals” described later 32

• A router 33 connected in cascade to the multiplexing unit 32 and connected to the above-described knockbone network 50

The digital subscriber line access multiplexer 40 is composed of the following elements. • Splitter 31-1—A switch with a common contact connected to the high-frequency terminal of 31η.

Switch 41- (η + 1) in which neither the common contact nor the make contact is connected to any circuit, and the break contact is directly connected to all the make contacts of the switches 41-1 to 41-η described above. These switches 41-1 and 4 卜 (η + 1) have input / output terminals respectively connected to the break contacts, and the first! Interface board with input / output terminals corresponding to the (η + 1) “line terminals” 42-1— 42- (η + 1)

• Connected to the bus terminal of interface panel 42-1—42- (η + 1) via internal node 43, and individually connected to the control input of switch 41-1 to 4 卜 (η + 1) Control unit with output port 44

In the digital subscriber line access multiplexing device 40 having such a configuration, the control unit 44 connects all the common contacts of the switches 41-1 to 41- (η + 1) to the break contacts at the time of start-up. Monitor and control the interface panel 42-1—42- (η + 1) at a specified frequency. [0006] In such a state, the interface board 42- (n + 1) is not connected to any of the “high band terminals” of the splitter 31-1-31-n, and is secured as a “reserved interface board”. Is done.

On the other hand, the interface panel 42-1-42-n is connected to the “high band terminal” of the splitter 31-1-31-n via the switches 41-1 and 41-n, respectively. Operates as a working interface board.

[0007] For the items common to the interface panel 42-1—42-n, the suffix “c” is added to the code, meaning that it can correspond to any of the suffix numbers “1” and “n”. And already described.

The operation of each part in the process of the high-speed data transmission service realized through the interface board 42-c, which is the “working interface board”, is as follows.

The splitter 11-c provided in the home 10-c and the splitter 31-c provided in the telephone station 30 have a low frequency band (hereinafter referred to as “low frequency”) suitable for a telephone signal system. By sharing the subscriber line 21-c with a high frequency band (hereinafter referred to as “high band”) suitable for high-speed data transmission based on ADSL, these “low band” and “high band” are shared. Real-time transmission in parallel with the “region”.

[0008] In the home 10-c, the personal computer 11-c is a CSMA / CD (Carrier Sense

Based on the Multiple Access with Collision Detection) method, desired information is sent and received at high speed in packet units. The ADSL modem 13-c interfaces between such a CSMAZCD system and the modulation / demodulation system that realizes ADSL in the above-mentioned “high band”.

In the central office 30, the high frequency signal (hereinafter referred to as “ADSL signal”) transmitted via the ADSL is transmitted to the interface board via the high frequency terminal of the splitter 31-c and the switch 41-c. Delivered to 42-c.

[0009] The interface panel 42-c is assumed to be an “ADSL signal” and a signal (here, “ATM signal”) that is compatible with the multiplexing Z demultiplexing method performed by the multiplexing unit 32. Perform bidirectional conversion with.

Such an “ATM signal” is handed over to the backbone network 50 under the above-described multiplexing Z demultiplexing and routing performed by the router 33. In addition, the control unit 44, for example, causes a failure in the interface board 42-1 under the monitoring control of the interface board 42-1—42- (n + l) (see FIG. 9 (1) and “ The interface is a “reserve interface board” When the face plate 42- (n + l) is normal, the following processing is performed.

• Interface board 4 by connecting the common contact of switch 41-1 to the make contact

2- Connect the high range terminal of splitter 3 卜 1 to (n + 1) (Fig. 9 (2)).

• Command the interface board 42- (n + l) via the internal node 43 to start operation as the “working interface board” (Fig. 9 (3)).

[0010] The interface board 42- (n + l) is provided in the in-home 10-1 by performing initialization processing including the following “node shake” and “training” in response to such a command. An alternative communication path is established with the AD SL modem 13-1 via the switch 41-1, the splitter 31-1, and the subscriber line 21-1.

• A DSP (not shown) that specifies that transmission via the digital subscriber line is based on the “ADSL system” and performs digital signal processing in the interface panel 42- (n + l). "Handshake" that loads firmware that conforms to the "ADSL system"

• Transmission characteristics (including loss, etc.) of the transmission line formed in the high band of the Karo Passer Line 21-1 by linking with the ADSL modem 13-1 via the interface panel 42- (n + l). “Training” to determine the transmission speed suitable for both transmission quality and transmission quality

In other words, in the digital subscriber line access multiplexer 40, n interface boards 42 individually corresponding to the subscriber lines 21-1 to 21-n under the supervisory control and system configuration control performed by the control unit 44. Even if a failure occurs in any of -1 to 42-n, the corresponding interface board is replaced with a spare interface board 42- (n + l).

Accordingly, reliability is improved and service quality is maintained high.

As prior arts related to the present invention, there are the following prior arts described in Patent Documents 1 to 13 and Non-Patent Document 1 described later.

• “An error on the telephone line connected to the ADSL modem is detected and the cause of the error is the off-hook power of the handset connected to the telephone line. Changes to on-hook, polarity reversal signal on the telephone line, on-hook power of the handset. Longer than dial pulse waiting time starting from change to off-hook ヽ When predetermined handshake waiting time has timed out or when a predetermined telephone line signal on the telephone line is detected within the handshake waiting time In addition, a fast retraining method, apparatus, and storage medium for an ADSL modem characterized by a shift to a fast retraining sequence .... JP 2000-295364 A

• “The terminal center connected through the cable modem to the CATV transmission line side by the LAN center where multiple center devices with N + 1 redundant configuration with N working center devices and one spare center device are installed. A central device is connected to a predetermined network through the network, maintains control information for multiple active center devices and standby center devices to be monitored, and periodically polls N active center devices to The fault center device in which the fault is detected is switched to the spare center device, and multiple center devices are connected to the CATV transmission line. Is switched to the spare center device, and the spare device is switched to the operating state based on the transferred control information. Method and Cable Modem System Using the Same "... Japanese Patent Laid-Open No. 11 215150

• “Cable modems and multiple CMTS modules are connected by a single cable, one of the CMT S serves as a backup for the other, and each CMTS is assigned to itself in a cable channel accessible by the cable modem. DSCs are broadcast simultaneously on one designated channel, and cable modems are assigned to provide a primary DSC, and each cable modem is assigned a separate DSC in addition to its primary CSD, This other DSC is given by a CMTS connected to a different cable than the main CMTS, so that when the cable modem's primary DSC becomes invalid, the cable modem goes to another DSC provided by another CMTS. Used with cable modems assigned to employ a primary downstream channel that is characterized by being switched and acting as a knock-up. Method used ”... JP 2002-247554 A

• “For splitterless non-targeted digital subscriber line (ADSL) transceivers, including procedures that do not require a splitter! Recommendations that specify power management procedures and link status for ITU-T Recommendation G. 992.2

Patent Document 1: JP 2000-295364 A Patent Document 2: Japanese Patent Laid-Open No. 11 215150

Patent Document 3: Japanese Patent Laid-Open No. 2002-247554

Non-Patent Document 1: ITU-T Recommendation G. 992. 2

Disclosure of the invention

Problems to be solved by the invention

[0012] By the way, in the conventional example described above, an alternative communication path between the interface board 42- (n + l) applied in place of the interface board 42-1 where the failure occurred and the ADSL modem 13-1. Can only be established after the time required for the initialization process, including the above-mentioned “nond shake” and “training”, has elapsed for about 30 to 60 seconds, which significantly reduces transmission quality and service quality. There was a high possibility of doing.

[0013] The present invention provides a network interface device, a system configuration control device, and digital subscriber line access multiplexing that can achieve high-speed updating of the system configuration reliably and inexpensively without changing the basic configuration. An object is to provide an apparatus.

Means for solving the problem

[0014] In the first invention, in the network interface device that interfaces the digital subscriber line and the backbone network, the storage means is notified from the outside and is applied to shorten the time required to start up the network interface device. Accumulate possible information. The control means starts up based on the accumulated information when an external force is specified. That is, since the start-up of the network interface device according to the present invention is started based on the information notified from the outside as described above, it is completed in a shorter time than the case where the information is not given.

[0015] Therefore, the replacement of another network interface device that starts at a high speed under a system configuration control performed externally or in which a failure has occurred is quickly realized.

In the second invention, in the network interface device that interfaces the digital subscriber line and the backbone network, the storage means is notified together with an identifier of another network interface device different from the network interface device and the identifier. In addition, a pair of information applicable to shortening the time required to start up the network interface device is stored. The control means is a pair corresponding to an identifier designated from outside among the pairs stored in the storage means. Start up based on information contained in.

That is, the start-up of the network interface device according to the present invention is based on the information notified from the outside as described above even if the number of other network interface devices described above is large. Be started.

Therefore, the start-up described above is completed in a short time as in the first invention, and the replacement of another network interface device in which a failure has occurred can be realized quickly.

[0017] In the third invention, in the network interface device that interfaces the digital subscriber line and the backbone network, the notification means is acquired in the startup process when the startup of the network interface device is completed. In addition, information applicable to shortening the startup time is notified to the outside.

That is, other network interface devices that have acquired such information can quickly complete startup as network interface devices that are used as substitutes for the network interface device according to the present invention.

[0018] Therefore, an apparatus configured to include these network interface apparatuses can quickly complete the update of the system configuration under the desired system configuration control, and the overall reliability is improved. According to a fourth aspect of the present invention, in the network interface device that interfaces the digital subscriber line and the backbone network, the notification means is acquired during the start-up process after the start-up of the network interface device is completed. Information that can be applied to shorten the time required for raising is notified to the outside at a predetermined frequency.

That is, even when such information is updated, another network interface device that has acquired the information can be quickly used as a network interface device that is used as a substitute for the network interface device according to the present invention. You can complete the launch.

Therefore, an apparatus including these network interface apparatuses can quickly complete the update of the system configuration under the desired system configuration control, and the overall reliability is improved.

[0020] In the fifth invention, in the network interface device that interfaces the digital subscriber line and the backbone network, the notification means is acquired in the process of starting up the network interface device, and the time required for startup is reduced. Each time the network interface device is restarted based on information applicable to shortening, the information is notified to the outside. The

That is, even when such information is updated, the other network interface device that has acquired the information is quickly started up as a network interface device that is used as a substitute for the network interface device according to the present invention. Can be completed.

[0021] Therefore, an apparatus configured including these network interface apparatuses can quickly complete the update of the system configuration under the desired system configuration control, and the overall reliability is improved. In the sixth invention, in the network interface device that interfaces the digital subscriber line and the backbone network, the notification means is performed prior to the specific event when the specific event occurs in the interface process. Information that can be used for start-up and applicable to shorten the time required for start-up is notified to the outside.

[0023] In a seventh aspect of the invention, in the system configuration control apparatus that performs a system configuration of a plurality of network interface apparatuses that are provided in an interface between the digital subscriber line and the backbone network and are redundantly provided, the storage means includes: Information acquired by multiple network interface devices individually during the start-up process and accumulated for shortening the time required for start-up. The information delivery means sends the current network interface device to a spare network interface device to be used in place of the current network interface device when a failure of the current network interface device is detected among the plurality of network interface devices. Deliver the information stored in the storage means in association with the device.

That is, the system configuration control of a plurality of network interface devices is achieved in a unified manner by the involvement of the system configuration control device according to the present invention. Information provided for high-speed startup is reliably delivered to the current network interface device power and its spare interface device.

Therefore, the complexity of the configuration of each network interface device and the significant increase in processing amount It is possible to speed up the update of the system configuration without accompanying.

[0025] According to an eighth aspect of the present invention, in the system configuration control apparatus for providing a system configuration of a plurality of network interface apparatuses provided for redundancy between the digital subscriber line and the backbone network, the information delivery means includes Identifies information that can be notified by a specific network interface device among multiple network interface devices and that is acquired by the specific network interface device during the startup process and that can be applied to shorten the startup time. It is handed over to a spare network interface device that is used as an alternative to the network interface device.

That is, the system configuration control of a plurality of network interface devices is achieved centrally by the involvement of the system configuration control device according to the present invention. In the process of the system configuration control, the current network interface device is used. Information that is obtained and used for the high-speed start-up of the spare network interface device is reliably delivered to the spare interface device.

Therefore, it is possible to speed up the update of the system configuration without accompanying the complexity of the configuration of each network interface device and a large increase in the processing amount.

[0027] In the ninth invention, the plurality of network interface means are provided as an interface between the digital subscriber line and the backbone network, and are provided redundantly. The system configuration control means performs system configuration of a plurality of network interface means. The information storage means provided in the system configuration control means accumulates information that can be acquired by a plurality of network interface means individually during the startup process and that can be applied to shorten the time required for startup. Further, the information delivery means provided in the system configuration control means is configured such that when a failure of the current network interface means is detected among the plurality of network interface means, the current network interface means under the system configuration. The information stored in the information storage means in association with the current network interface means is transferred to the spare network interface means used for replacement.

[0028] That is, system configuration control of a plurality of network interface devices is centrally achieved by involving a system configuration control device provided separately from these network interface means. In the process of system configuration control, Information obtained by the active network interface device and used for the high-speed startup of the spare network interface device is stored in the spare network interface device. Delivered reliably to the tough device.

[0029] Therefore, it is possible to speed up the updating of the system configuration without complicating the configuration of each network interface device and significantly increasing the processing amount.

In the tenth invention, the plurality of network interface means are provided as an interface between the digital subscriber line and the backbone network and are provided redundantly. Among the plurality of network interface means, a specific network interface means constitutes a system configuration of the plurality of network interface means, and is provided under the system configuration as a substitute for the specific network interface means corresponding to the active system. The specific network interface means acquires information that can be acquired during the start-up process and can be applied to shorten the time required for start-up.

[0030] That is, system configuration control of a plurality of network interface devices is achieved by the involvement of specific network interface means corresponding to any one of these network interface means. The information acquired by the network interface device and used for the high-speed startup of the spare network interface device is reliably delivered to the spare interface device.

Accordingly, in conjunction with the standardization of the configuration, the system configuration can be updated at high speed.

In the eleventh aspect, the plurality of network interface means are provided as an interface between the digital subscriber line and the backbone network and are provided redundantly. The system configuration control unit performs system configuration of a plurality of network interface units. Among the plurality of network interface means, the network interface means corresponding to the active system under the system configuration is acquired individually during the startup process, and information applicable to shortening the startup time is stored in the system configuration. Then, it is handed over to the network interface means corresponding to the standby system. The network interface means corresponding to the standby system stands up based on the information delivered by the network interface means to be substituted based on the system configuration among the information delivered by the network interface means corresponding to the active system. Raise it.

That is, the system configuration control of the plurality of network interface means is centrally achieved by the involvement of the above-described system configuration control means even when the number of these network interface means is large. In the process of system configuration control, the current network interface device Thus, the information acquired and used for the high-speed network startup of the spare network interface device is surely delivered to the spare interface device.

Therefore, it is possible to speed up the update of the system configuration without requiring the configuration of each network interface device to be complicated and greatly increase the processing amount.

In the sixth invention, it is possible to prevent the above-mentioned information from being notified to the outside in a state where no event occurs, and to reduce the load compared to the third! / And the sixth invention. For the purpose of mitigation, the specific events described above may be limited to network interface device failures or failures that interfere with the interface.

In the third and sixth inventions, the system configuration of the network interface device is realized without directly linking with other network interface devices not corresponding to any of these network interface devices, Multiple network interface devices provided redundantly together with the network interface device in order to reduce the complexity of the configuration and the increase in processing amount due to the distribution of the loads and functions that affect the system configuration The system configuration control means for performing this system configuration may correspond to the outside.

Furthermore, in the third to sixth inventions, the system configuration of the network interface device is realized under functional distribution and load distribution by these network interface devices, and the complexity of the configuration and the increase in the processing amount are increased. If allowed, a spare network interface device provided redundantly with the network interface device for the purpose of standardizing the functions and configuration of these network interface devices and serving as an alternative to the network interface device. May fall outside.

[0036] Further, in the tenth invention, the spare network interface means is applied in the startup process, and information for shortening the startup time is stored in the spare network interface means. By handing over directly from the means, the delivery of this information in the process of updating the system configuration is compared to the case where "means that does not fall under any of the working and backup network interface means" is involved. When a factor that impedes operation as an active system occurs for the purpose of promptly achieving renewal, a specific network interface means is designated as a spare network interface means. Applicable for shortening the time required for startup Information "may be handed over.

[0037] Further, in the eleventh invention, when a factor that prevents the network interface means corresponding to the active system from preventing "operation as the active system" occurs, it is specified as the network interface means corresponding to the standby system. The network interface means that is acquired during the start-up process and handing over information applicable to shortening the time required for the start-up allows the network interface means corresponding to the standby system to be in the state where such factors do not occur. It may be possible to suppress unnecessary notification of the above information and to reduce the load.

The invention's effect

[0038] As described above, in the present invention, the network interface device in which a failure has occurred can be quickly replaced under system configuration control that is performed externally.

Further, according to the present invention, even if the total number of network interface devices is large, start-up is completed quickly based on information notified from the outside.

Furthermore, according to the present invention, the device configured to include the network interface device according to the present invention can quickly complete the update of the system configuration under the desired system configuration control, and the overall reliability can be improved. Highly maintained.

[0039] In the present invention, the load can be reduced.

Furthermore, according to the present invention, the complexity of the configuration and the increase in the processing amount due to the distribution of loads and functions that affect the system configuration are alleviated.

Further, in the present invention, functions and configurations are standardized.

Furthermore, according to the present invention, a high-speed update of the system configuration can be achieved without complicating the configuration and greatly increasing the processing amount.

[0040] Further, according to the present invention, a high-speed update of the system configuration can be achieved along with the standardization of the configuration.

Furthermore, in the present invention, compared with the case where the above-mentioned information passing in the process of updating the system configuration involves means not corresponding to any of these working and backup network interface means, the system configuration is updated. Renewal is achieved promptly.

Therefore, in a communication system to which these inventions are applied, service quality and transmission quality are improved in addition to total reliability without changing the basic configuration, and work related to maintenance and operation is performed. Efficiency and simplification are achieved. Brief Description of Drawings

FIG. 1 is an operation flow chart of the interface board in the first and second embodiments of the present invention.

FIG. 2 is a diagram for explaining the operation of the first embodiment of the present invention.

FIG. 3 is a diagram for explaining the operation of the second embodiment of the present invention.

FIG. 4 is an operation flowchart of a control unit in the third embodiment of the present invention.

FIG. 5 is an operation flowchart of the interface board in the third embodiment of the present invention.

FIG. 6 is a diagram for explaining the operation of the third embodiment of the present invention.

FIG. 7 is a diagram for explaining an operation in another configuration of the third exemplary embodiment of the present invention.

[FIG. 8] A diagram showing an example of the configuration of in-house and telephone station equipment that realizes the provision of data communication services via digital subscriber lines.

FIG. 9 is a diagram for explaining the operation of the digital subscriber line access multiplexer in the conventional example.

BEST MODE FOR CARRYING OUT THE INVENTION

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

The feature of each embodiment described below lies in the procedure of processing performed by the interface panel 42-1—42- (n + l) or the control unit 44, and the hardware configuration is basically the same. Since this is the same as the conventional example shown in FIG. 8, the description and illustration thereof are omitted here.

[First embodiment]

FIG. 1 is an operation flowchart of the interface board in the first and second embodiments of the present invention.

Hereinafter, with reference to FIG. 1, FIG. 2 and FIG. 8, the control unit 44, which explains the operation of the first embodiment of the present invention, performs the monitoring control and the system configuration control described above in the same manner as in the conventional example, These interfaces are addressed to the interface panel 42-1-42- (n + 1) via the internal bus 43. The identifier of the interface board corresponding to the standby system (assuming that it is “Interface board 42- (n + l)”) among the interface boards 42-1—42- (n + l) ( In the following, the “reserved system identifier”;) is notified (Fig. 2 (1)).

[0044] At the time of start-up, the interface board 42-c is linked with the ADSL modem 13-c via the subscriber line 21-c and performs initialization processing including the above-described "node shake" and "training". As a result, a communication path is established with the ADSL modem 13-c provided in the home 10-C via the switch 41-c, the splitter 31-c, and the subscriber line 21-c.

Further, when the interface board 42-c completes the establishment of such a communication path, it performs the following processing individually.

• Holds a “profile”, which is a set of information obtained during the initialization process described above and used for the “fast retrain” described later (FIGS. 1 (1) and 2 (2)).

• Pass this “profile” to the interface board 42- (n + l) indicated by the above-mentioned backup system identifier among the interface boards 42-1—42- (n + l) via the internal bus 43. (Fig. 1 (2), Fig. 2 (3)).

[0045] The interface board 42- (n + 1) uses the “profile” delivered from the interface board 42-c in this way as the identifier of the interface board 42-c (hereinafter referred to as “active system identifier”). (Fig. 1 (3), Fig. 2 ()).

In addition, the control unit 44, for example, under the monitoring control of the interface panel 42-1—42- (n + l), for example, a failure occurs in the interface panel 42-1 (FIG. 2 (4)), and “standby If the interface board 42- (n + l), which is the "interface board", is normal, the following processing is performed.

• By connecting the common contact of switch 41-1 to the make contact, connect the high range terminal of splitter 3 卜 1 to interface panel 4 2- (n + 1) (Fig. 2 (5)).

• To the interface board 42- (n + l) via the internal node 43, includes the “failure system identifier indicating the interface board 42-1 in which the above failure has occurred” and “ Command the start of operation as a working interface board to replace the shown interface board 42-1 (Fig. 2 (6)).

[0046] The interface panel 42- (n + 1) has the corresponding "working system identifier" among the "profiles" handed over from the interface board 42-1-42-n in advance. No obstacle Based on the “profile” equal to the “harmful identifier”, for example, the “fast retrain” defined in Recommendation G. 99.2.2 of ITU-T (International Telecommunication Union-Telecommunication Standardization Sector) is performed (FIG. 1 (4 ), Fig. 2 (b) establishes an alternative communication path with the ADSL modem 13-1 provided in the home 10-1.

[0047] Further, in the process of such "first retrain", the above-described "profile" is applied to the process procedure corresponding to "training" among the processes performed as the initialization process described above. This reduces the need for a new “profile” and thus greatly reduces the time required.

Furthermore, “fast retrain” is essentially a large occurrence that occurs in response to on-hook, off-hook, polarity reversal, etc. under the subscriber line signaling system that uses the low bandwidth of the subscriber line 21-c. It is started for the purpose of quickly and powerfully canceling transmission quality degradation due to the distribution of harmonic components of level pulses in the “high range” and interruption of data communication. And easily realized.

Therefore, according to the present embodiment, any of the interface panels 42-1 to 42-n can be made redundant based on the spare system without increasing the cost or complicating the configuration (N + 1). When the system is configured and fails, the system configuration change “replacement by the spare interface panel 42- (n + l)” is achieved more quickly than the conventional example, and data communication can be resumed at high speed. .

[Second Embodiment]

Hereinafter, the operation of the second embodiment of the present invention will be described with reference to FIG. 1, FIG. 3, and FIG. 8. The control unit 44 performs the above-described monitoring control and system configuration control in the same manner as in the conventional example. One of these interface panels 42-1—42- (n + l) to the interface panel 42-1-42- (n + 1) via the internal bus 43, which corresponds to the standby system The interface board (here, it is assumed that it is “Interface board 42- (n + l)”) (hereinafter referred to as “reserve system identifier”;) (Fig. 3 (1)).

[0050] The interface board 42-c is connected to the ADSL modem 13-c via the subscriber line 21-c at startup. By coordinating and performing the initialization process including the “nond shake” and “training” described above, the switch 10-c, the splitter 31-c, and the subscriber line 21-c are connected to the home 10-C. A communication channel is established with the provided ADSL modem 13-c.

Further, when the establishment of such a communication path is completed, the interface board 42-c holds the “profile” acquired in the above-described initialization process and used for the above-mentioned “first retrain”. (Fig. 1 (1), Fig. 3 (2).

[0051] Further, for example, the interface board 42-1 has a failure of the interface board 42-c, or "the normal operation of this interface board 42-c is prevented, but the spare interface board 42-(n + 1) The event that can be recovered by substituting for the system is detected either autonomously or in cooperation with the control unit 44 (Fig. 1 (5), Fig. 3 (3), and the interface panel 42-1—42- (n + l), this “profile” is handed over to the interface board 42- (n + l) indicated by the above-mentioned standby system identifier via the internal bus 43 (FIG. 1 (6), FIG. 3 ( Four".

[0052] The interface board 42- (n + 1) obtains the "profile" handed over from the interface board 42-c in this way as the identifier of the interface board 42-c (hereinafter, "active system identifier"). (Figure 1 (3), Figure 3 ().

In addition, the control unit 44, for example, causes the above-described failure or event to occur in the interface panel 42-1 under the monitoring control of the interface panel 42-1—42- (n + l) (see FIG. 3 (3)). If the interface board 42- (n + l), which is the “prepared interface board”, is normal, the following processing is performed.

• By connecting the common contact of switch 41-1 to the make contact, the high band terminal of splitter 3 スプリッタ 1 is connected to interface panel 4 2- (n + 1) (Fig. 3 (5)).

• To the interface board 42- (n + l) via the internal node 43, includes the “failure system identifier indicating the interface board 42-1 in which the above failure has occurred” and “ Command the start of operation as a working interface board to replace the shown interface board 42-1 (Fig. 1 (3), Fig. 3 (6)).

[0053] The interface panel 42- (n + 1) has the “active system identifier” corresponding to the above-mentioned “profile” among the “profiles” delivered and held in advance from the interface board 42-1-42-n. Based on the “profile” equal to the “failure system identifier” of “ By performing “First Retrain” (Fig. 1 (4), Fig. 3 (b)), an alternative communication path is established with the AD SL modem 13-1 provided in the home 10-1.

[0054] That is, among the interface boards 42-1 to 42-n, the above-mentioned failures occur in parallel, or the smaller the maximum number of interface boards that can detect the above-described event, the smaller the number of spare boards. The size of the storage area provided for the interface panel 42- (n + l) and used to maintain the profile can be reduced. Also, any of these interface panels 42-1 to 42-n, like the first embodiment described above, is a “reserve interface panel 42- (n + l Substituting by “)” is achieved more quickly than the conventional example, and resumption of data communication is realized at high speed.

[0055] Therefore, according to the present embodiment, even when the total number of accommodated ADSLs (digital subscriber lines) is large, the cost and power consumption can be reduced compared to the first embodiment described above. Figured.

[Third embodiment]

FIG. 4 is an operation flowchart of the control unit in the third embodiment of the present invention.

In FIG. 6, the same processes as those shown in FIG. 2 are given the same numbers as those in FIG. 2 for the purpose of clarifying the correspondence with the first embodiment described above.

Hereinafter, the operation of the third embodiment of the present invention will be described with reference to FIG. 4, FIG. 6, and FIG.

The control unit 44 performs the above-described monitoring control and system configuration control in the same manner as in the conventional example, and the interface board corresponding to the standby system among the interface boards 42-1 to 42- (n + l) (here, (It is assumed that the interface panel is 42- (n + l).) The “standby system identifier” is retained.

[0058] At startup, the interface panel 42-c is linked to the ADSL modem 13-c via the subscriber line 21-c and performs the above-described initialization process, whereby the switch 41-c and the splitter 31 are connected. -c and subscriber line 21-c to ADSL modem 13-c installed in customer premises 10-c Establish a channel.

• Holds a “profile”, which is a set of information acquired during the initialization process described above and used for the “fast retrain” described later (FIGS. 5 (1) and 6 (2)).

• This “profile” is handed over to the control unit 44 via the internal bus 43 (FIGS. 5 (2) and 6 (A)). It is not handed over to the 1S spare interface board 42- (n + l).

The control unit 44 holds the “profile” handed over from the interface board 42-c in this manner in association with the identifier of the interface board 42-c (hereinafter referred to as “active system identifier”). (Fig. 4 (1), Fig. 6 (B)).

In addition, the control unit 44, for example, under the monitoring control of the interface panel 42-1—42- (n + l), for example, a failure occurs in the interface panel 42-1 (FIG. 6 (4)), and “standby When the interface board 42- (n + l), which is the “interface board”, is identified as normal, the following processing is performed. • Connect the high frequency terminal of the splitter 31-1 to the interface panel 4 2- (n + l) by connecting the common contact of the switch 41-1 to the make contact (Fig. 4 (2), Fig. 6 (5 >>

• To the interface board 42- (n + 1) via the internal node 43, together with “Failure system identifier indicating the faulty interface board 42-1” and “the interface part 42-1 "The command to start operation as a working interface board that replaces the interface board 42-1 indicated by the faulty identifier" is sent out (see Fig. 4 (3)). Figure 6 (C)).

[0060] The interface panel 42- (n + l) is based on the “profile” included in such a directive, and is based on the “fast retrain” defined in the above-mentioned recommendation ITU-T recommendation G. 992.2. (Fig. 5 (7) and Fig. 2 (D) establish an alternative communication path with the ADSL modem 13-1 provided in the home 10-1.

Also, in the “fast retrain” process, the processing procedure corresponding to “training” among the processes performed as the initialization process described above is applied by applying the above-mentioned “profile”. Simplified. However, the procedure of this process is shortened in the same manner as in the first embodiment described above because it is not necessary to newly obtain the above-mentioned “profile”. The

[0061] Furthermore, the "profile" applied to such "first retrain" is stored once in the control unit 44 regardless of the number of the interface boards 42-1 to 42-n. Delivered to spare interface board 42- (n + l).

Therefore, according to the present embodiment, the interface board 42- (n + l) (or any of the interface boards 42-1—42- (n + l)) has all the power of the current interface board. The system configuration of the interface panel 42-1—42- (n + l) is based on the (N + 1) backup method without providing a large storage area for holding the “profile” delivered individually. The interface board that has been realized and has failed is replaced by the spare interface board 42- (n + l) more quickly than the conventional example.

In this embodiment, instead of the spare interface board-(n + 1) in the first embodiment described above, the control unit 44 notifies from the current interface board 42-1—42-n. Of these interface panels 42-1—42-n, the previously notified “profile” from the interface panel where the failure occurred is stored in the spare interface panel-(n +1).

However, the present embodiment is not limited to such a configuration. For example, as shown by a thick line in FIG. 7 and by a dotted line in FIG. 5, the first embodiment is replaced with the first embodiment described above. The second embodiment is applied and the “profile” notified from the current interface board 42-1—42-n is retained, and the interface interface in which the failure has occurred among these interface boards 42-1—42-n. The transfer to the spare interface board (n + 1) of the “profile” notified in advance by the one board board controller may be performed by the control unit 44.

[0064] In FIG. 7, for the purpose of clarifying the correspondence with the second embodiment described above, the same processing as that shown in FIG. 3 is assigned the same number as that in FIG. Show.

In each of the above-described embodiments, the (N + 1) preliminary method is applied. However, according to the present invention, ADSL failure recovery can be performed at high speed by performing fast retraining based on the above-mentioned “profile” in a spare interface panel that is used as a substitute for a failed interface panel. If achieved, it may be configured by duplicating individual working interface boards. Furthermore, in each of the above-described embodiments, the “first train” defined in ITU-T Recommendation G. 992.2 is used in order for the spare interface board to start operation as an active interface board at high speed. The “Profile” described above is applied to the “First Retrain”.

However, the present invention is not limited to such a configuration. For example, the present invention is obtained in the process of “training” performed at the start of the interface panel, and is applied to the above-described high-speed operation of the spare interface panel. Whatever information is possible may be applied in place of the previously described “profile”, and if that fast speed is based on this information, it falls under “first train”. However, it can be realized as any processing.

Further, in each of the above-described embodiments, the digital subscriber line access multiplexing apparatus 40 and the controller 44 are provided.

However, such a digital subscriber line access multiplexer 40 is operated by the distributed processing of the interface panel 4 2-1 42- (n + l), or by the host device of the digital subscriber line access multiplexer 40. If the functions of the control unit 44 (including the monitoring control of the interface panel 42-1 and 42- (n + l) and the system configuration control) are realized, the control unit 44 is not provided. May be configured.

[0067] Among the processes performed by the control unit 44, the linkage with the interface panel 42-1—42- (n + l) in the process of the above-described monitoring control, system configuration control and other processes is the contention. It can be realized based on either the method or the polling method!

Further, in each of the above-described embodiments, the interface panel 42-1—42-n is connected to the spare interface panel 42- (n + l) or the control unit 44 at the time of start-up or when a failure occurs. Is handing over.

[0068] However, when such a "profile" is delivered, for example, when the "profile" may be updated in response to the failure or other events described above, It may be set at any of the following times for the purpose of flexible adaptation and ensuring reliability, transmission quality and service quality.

• Time points given in a predetermined cycle

• Activated in response to a natural event such as on-hook, off-hook, polarity reversal, etc. When "First Retrain" is completed

• When a desired event is identified during the communication procedure or call setup process

• When interface board 42-1—42- (n + l) failure, or event that causes a failure or causes such failure

Further, in each of the above-described embodiments, the restoration of the ADSL in which the failure has occurred is attempted to the physical layer based on the (N + 1) backup method.

However, the present invention is not limited to such a configuration. For example, even when the control unit 44 performs a behavior that conforms to a communication procedure in a layer higher than the data link layer, the ADSL in which a failure has occurred can be recovered. Yo! /

Furthermore, the present invention is not limited to the above-described embodiments, and various embodiments are possible within the scope of the present invention, and any improvements are made to all or part of the constituent devices. Also good.

Claims

The scope of the claims

[1] In a network interface device that interfaces the digital subscriber line and the backbone network,

Storage means for storing information that is notified from the outside and that can be applied to shorten the time required to start up the network interface device;

Control means for starting up based on the accumulated information when an external force is also designated;

A network interface device comprising:

[2] In a network interface device that interfaces the digital subscriber line and the backbone network,

Storage means for storing a pair of an identifier of another network interface device different from the network interface device and information that is notified together with the identifier and that can be applied to shorten the time required to start up the network interface device When,

Control means for starting up based on information included in the pair corresponding to the identifier specified by the external force among the pairs stored in the storage means;

A network interface device comprising:

[3] In a network interface device that interfaces the digital subscriber line and the backbone network,

Provided with notification means for notifying outside of information that is obtained during the startup process and that can be applied to shorten the startup time when startup of the network interface device is completed

A network interface device.

[4] In a network interface device that interfaces the digital subscriber line and the backbone network,

When the start of the network interface device is completed, it is provided with a notification means for notifying the outside at a predetermined frequency of information obtained in the start-up process and applicable to shortening the time required for the start-up. The

A network interface device.

[5] In a network interface device that interfaces the digital subscriber line and the backbone network,

Each time the restart of the network interface device is completed based on the information acquired in the process of starting the network interface device and applicable to shortening the time required for the start-up, the information is externalized. Provide notification means to notify

A network interface device.

[6] In a network interface device that interfaces the digital subscriber line and the backbone network,

When a specific event occurs in the process of the interface, it is used for the startup that preceded the specific event, and informs the outside of the information that can be applied to shorten the time required for the startup. With notification means

A network interface device.

[7] The network interface device according to claim 6,

The specific event is

Failure of the network interface device or failure that hinders the interface

A network interface device.

[8] The network interface device according to any one of claims 3 to 7, wherein the outside is

System configuration control means for performing system configuration of a plurality of network interface devices provided redundantly together with the network interface device

A network interface device.

[9] The network interface device according to any one of claims 3 to 7, wherein the outside is

A redundant network interface device provided redundantly together with the network interface device and used in place of the network interface device.

A network interface device.

[10] Used for interface between digital subscriber line and backbone network, and redundant In a system configuration control device that performs system configuration of a plurality of network interface devices provided in the head,

Storage means for storing information that can be acquired by each of the plurality of network interface devices individually during the startup process and that can be applied to shorten the time required for startup;

Of the plurality of network interface devices, when a failure of the current network interface device is detected, the spare network interface device serving as a substitute for the current network interface device is replaced with the active network interface device. Information delivery means for delivering the information stored in the storage means in association with the information;

A system configuration control apparatus comprising:

[11] In a system configuration control device for system configuration of a plurality of redundantly provided network interface devices provided for an interface between a digital subscriber line and a backbone network.

Among the plurality of network interface devices, information notified by a specific network interface device and acquired by the specific network interface device in the process of startup, and information applicable to shortening the time required for startup Information delivery means to be handed over to a spare network interface device to be used as a substitute for a specific network interface device;

A system configuration control apparatus comprising:

[12] A plurality of redundantly provided network interface means serving as an interface between the digital subscriber line and the backbone network;

System configuration control means for performing system configuration of the plurality of network interface means, the system configuration control means,

Information storage means for storing information acquired by each of the plurality of network interface means individually during the startup process and applicable for shortening the time required for startup; and among the plurality of network interface means, When a failure of the network interface means is detected, a spare network interface means used in place of the current network interface means under the system configuration is associated with the current network interface means. And information delivery means for delivering information stored in the information storage means A digital subscriber line access multiplexer characterized by the above.

[13] Provided with a plurality of redundantly provided network interface means for interface between the digital subscriber line and the backbone network,

Among the plurality of network interface means, a specific network interface means performs a system configuration of the plurality of network interface means, and replaces the specific network interface means corresponding to the active system with the system configuration. The information obtained by the specific network interface means during the start-up process and applicable for shortening the start-up time is delivered to the spare network interface means provided in

A digital subscriber line access multiplexing apparatus comprising:

[14] In the digital subscriber line access multiplexer according to claim 13,

The specific network interface means includes:

Applied to the spare network interface means when the specific network interface means is acquired during the start-up process when a factor that hinders operation as the active system occurs, and is applied to shorten the time required for the start-up. Deliver possible information

A digital subscriber line access multiplexer characterized by the above.

[15] A plurality of redundantly provided network interface means serving as an interface between the digital subscriber line and the backbone network;

System configuration control means for performing system configuration of the plurality of network interface means, and among the plurality of network interface means, network interface means corresponding to the active system under the system configuration is:

Information obtained in the process of starting up individually and applicable to shortening the time required for starting up is handed over to the network interface means corresponding to the standby system under the system configuration. Is

Of the information delivered by the network interface means corresponding to the active system, start-up is performed based on the information delivered by the network interface means to be substituted based on the system configuration

A digital subscriber line access multiplexer characterized by the above. 16. The digital subscriber line access multiplexer according to claim 15, wherein the network interface means corresponding to the active system is:

When a factor that hinders the operation as the active system occurs, the network interface means corresponding to the standby system is acquired by the specific network interface means during the startup process, and the time required for the startup is reduced. Pass applicable information to

A digital subscriber line access multiplexer characterized by the above.