JP2000124910A - Duplexing system for access line - Google Patents

Duplexing system for access line

Info

Publication number
JP2000124910A
JP2000124910A JP10294347A JP29434798A JP2000124910A JP 2000124910 A JP2000124910 A JP 2000124910A JP 10294347 A JP10294347 A JP 10294347A JP 29434798 A JP29434798 A JP 29434798A JP 2000124910 A JP2000124910 A JP 2000124910A
Authority
JP
Japan
Prior art keywords
line
wireless
wired
terminal
atm
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10294347A
Other languages
Japanese (ja)
Inventor
Tetsuya Morizumi
哲也 森住
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyo Communication Equipment Co Ltd
Original Assignee
Toyo Communication Equipment Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Communication Equipment Co Ltd filed Critical Toyo Communication Equipment Co Ltd
Priority to JP10294347A priority Critical patent/JP2000124910A/en
Publication of JP2000124910A publication Critical patent/JP2000124910A/en
Pending legal-status Critical Current

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  • Data Exchanges In Wide-Area Networks (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Radio Relay Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an access system network for which it is not necessary to duplex subscriber's line terminal station equipment. SOLUTION: User terminals 1-6 are provided with both interfaces of wired and wireless systems and concerning an exchange, an access system network based on ATM data transfer techniques is constructed from an exchange 20 provided with the interface of the wireless system and an exchange 30 provided with the interface of wired system. Then, the line of wired system is made into a route through subscriber's line terminal station equipment 40 and the line of wireless system is made into a route through a wireless interchange station 71 loaded on a moored float 8. If a fault occurs on one line when the wired and wireless systems are simultaneously used all the time, the transmission destination identification information of ATM cells of transmission data is reloaded by an exchange 10 so that the other line can be used as a detour route, and the spot of the fault is bypassed.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、ディジタルデータ
伝送における低価格のアクセス系ネットワークに関す
る。
The present invention relates to a low-cost access network in digital data transmission.

【0002】[0002]

【従来の技術】従来より、ディジタルデータ伝送におけ
るユーザ端末から伝送路、交換機を経て中継伝送路に至
るアクセス系において、マルティメディアサービスを経
済的に提供できるようディジタル化が進められている。
図2は、従来のアクセス系のネットワークの一例を示す
構成概要図である。同図に示すように、該ネットワーク
は、ディジタル交換機81、加入者線端局装置82、無
線基地局83、無線接続されたユーザ端末84、85及
び有線接続されたユーザ端末86、87で構成される。
同図の構成において、該アクセス系に接続されたユーザ
端末のうち無線接続されたユーザ端末84、85は無線
基地局83を介し、また、有線接続されたユーザ86、
87は光ケーブルあるいはメタルケーブルを介して、そ
れぞれ加入者線端局装置82に接続される。該加入者線
端局装置82に接続されたユーザ端末からのデータは、
ディジタル交換機81の交換動作によって広域ネットワ
ークへと接続される。前記加入者線端局装置82ではユ
ーザからのデータを接続するインタフェースとして、図
中にピックアップして示すように、正常系と異常系の2
系統の回線が各端末との間に用意されている。そして常
時使用される、例えば端末87の正常系回線に事故が発
生した場合、該加入者線端局装置82で前記故障を検知
し、前記端末87用の接続回線を正常系から異常系に切
替えることによって異常事態が発生した際のバックアッ
プ体制を整えている。
2. Description of the Related Art Conventionally, digitization has been promoted in an access system from a user terminal in digital data transmission to a relay transmission line via a transmission line and an exchange so that multimedia services can be economically provided.
FIG. 2 is a schematic configuration diagram showing an example of a conventional access network. As shown in the figure, the network comprises a digital exchange 81, a subscriber line terminal unit 82, a radio base station 83, user terminals 84 and 85 wirelessly connected, and user terminals 86 and 87 wired. You.
In the configuration shown in the figure, among the user terminals connected to the access system, wirelessly connected user terminals 84 and 85 are connected via a wireless base station 83,
87 is connected to the subscriber line terminal unit 82 via an optical cable or a metal cable. The data from the user terminal connected to the subscriber line terminal unit 82 is
The exchange operation of the digital exchange 81 connects to the wide area network. In the subscriber line terminal unit 82, as an interface for connecting data from a user, as shown in FIG.
A system line is provided between each terminal. When an accident occurs in the normal line of the terminal 87 which is always used, for example, the failure is detected by the subscriber line terminal unit 82, and the connection line for the terminal 87 is switched from the normal line to the abnormal line. As a result, a backup system is established in the event of an abnormal situation.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、前記加
入者線端局装置の異常系の回線は、該加入者線端局装置
の正常系の回線が正常に動作している場合は、当然使用
されておらず無駄な設備である。そのため、加入者線端
局装置1台当たりの装置価格が高額となり、ユーザに対
し低コストのサービスを提供することができないという
欠点があった。本発明は、上記課題を解決するためにな
されたものであって、加入者線端局装置の二重化を必要
としないアクセス系ネットワークを提供することを目的
とする。
However, the abnormal line of the subscriber line terminal unit is naturally used when the normal line of the subscriber line terminal unit is operating normally. It is wasteful equipment. For this reason, the unit price per subscriber line terminal unit becomes high, and there is a disadvantage that low-cost services cannot be provided to the user. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an access network which does not require the duplication of the subscriber line terminal equipment.

【0004】[0004]

【課題を解決するための手段】上記課題を解決するた
め、請求項1に記載の発明においては、非同期転送モー
ド(ATM:Asynchronous Transfer Mode)技術を導入
したアクセス系ネットワークにおいて、ユーザ端末及び
ATM交換機に有線系と無線系の接続回線を常備し、前
記無線系回線は係留浮遊体に装備された無線中継装置を
介する経路とすることを特徴とする。請求項2に記載の
発明においては、前記有線系接続回線に障害が生じたと
きは、伝送データのATMセルに付された伝送先識別情
報を書き換えることによって前記無線系接続回線を迂回
経路とし、また、前記無線系接続回線に障害が生じたと
きは、伝送データのATMセルに付された伝送先識別情
報を書き換えることによって前記有線系接続回線を迂回
経路とすることを特徴とする。
In order to solve the above problems, according to the first aspect of the present invention, a user terminal and an ATM exchange are provided in an access network in which an asynchronous transfer mode (ATM) technique is introduced. In addition, a wired connection line and a wireless connection line are always provided, and the wireless connection line is a path via a wireless relay device mounted on the moored floating body. In the invention according to claim 2, when a failure occurs in the wired connection line, the wireless connection line is set as a bypass route by rewriting transmission destination identification information attached to an ATM cell of transmission data, Further, when a failure occurs in the wireless connection line, the wired connection line is set as a bypass route by rewriting transmission destination identification information attached to the ATM cell of the transmission data.

【0005】[0005]

【発明の実施の形態】以下、本発明を図面に示した実施
の形態に基づいて詳細に説明する。図1は、本発明に係
わるアクセス系ネットワークの実施の一形態例を示す構
成概要図である。同図に示すように、本ネットワーク
は、広域ネットワークに接続されたATM交換機10
と、該ATM交換機10に接続されたATM交換機2
0、30と、前記ATM交換機20に接続された無線基
地局9と、前記交換機30に接続された正常系のみで構
成される加入者線端局装置40と、該加入者線端局装置
40に接続された無線基地局7と、前記無線基地局9と
無線回線で接続された無線中継局70と、該無線中継局
70を搭載する係留された飛行船8、並びに有線及び無
線の両接続回線を備えたユーザ端末1〜6とで構成され
ている。更に、前記のATM交換機10、20、30と
加入者線端局装置40と無線中継局70には、それぞれ
に下流の方向(ユーザ端末が接続される方向)の回線の
状況を監視する回線識別制御部11、21、31、4
1、71を有している。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is a schematic configuration diagram showing an example of an embodiment of an access network according to the present invention. As shown in the figure, this network is an ATM switch 10 connected to a wide area network.
And an ATM switch 2 connected to the ATM switch 10.
0, 30; a radio base station 9 connected to the ATM exchange 20; a subscriber line terminal 40 composed of only a normal system connected to the exchange 30; , A wireless relay station 70 connected to the wireless base station 9 by a wireless line, a moored airship 8 on which the wireless relay station 70 is mounted, and both wired and wireless connection lines And user terminals 1 to 6 having Further, the ATM exchanges 10, 20, and 30, the subscriber line terminal unit 40, and the radio relay station 70 each have a line identification for monitoring the state of the line in the downstream direction (the direction in which the user terminal is connected). Control units 11, 21, 31, 4
1, 71.

【0006】本発明に係わるネットワークには、ATM
(非同期転送モード)の情報転送方式を用いる。周知の
ように、ATM情報転送方式は、転送するあらゆる種類
の情報を固定長のブロックに分割し、これに伝送先識別
情報を付加したセル(ATMセル)の形にし、このセル
単位で情報を多重化して転送する技術である。このAT
Mの特徴の一つに、前記セルの識別情報によって伝送経
路の制御、即ち経路の設定や変更を容易に行うことがで
きるという点がある。また、本ネットワークにおける広
域ネットワークから端末へ至るデータ伝送経路は、交換
機、加入者線端局装置、無線中継局等のネットワークの
ノードの回線識別制御部が設定して端末に通知する。一
方、端末は前記ノードからの経路設定あるいは障害発生
時の経路変更指示に対応して伝送経路を切り替える性能
を有するものである。
[0006] The network according to the present invention includes an ATM.
(Asynchronous transfer mode) information transfer method is used. As is well known, the ATM information transfer method divides all types of information to be transferred into fixed-length blocks, forms a cell (ATM cell) having destination identification information added thereto, and transfers the information in cell units. This is a technique of multiplexing and transferring. This AT
One of the features of M is that the control of the transmission path, that is, the setting and change of the path can be easily performed by the identification information of the cell. The data transmission path from the wide area network to the terminal in the present network is set by a line identification control unit of a network node such as an exchange, a subscriber line terminal unit, or a wireless relay station, and notified to the terminal. On the other hand, the terminal has a capability of switching the transmission path in response to a path setting from the node or a path change instruction when a failure occurs.

【0007】図1の構成において、正常動作時の広域ネ
ットワークからユーザ端末への伝送路は、有線系のアク
セス系としてATM交換機10及びATM交換機30を
経て加入者線端局装置40に接続され、 更に加入者線
端局装置40から端末3、4のように無線回線によって
無線基地局7を中継するものを含めて、有線で端末1〜
4に接続される経路と、無線系のアクセス系としてAT
M交換機10及びATM交換機20を経て無線基地局9
に接続され、 更に無線基地局9から無線回線によって
無線中継局70を中継して端末5、6に接続される経路
とがある。
In the configuration shown in FIG. 1, the transmission path from the wide area network to the user terminal during normal operation is connected to the subscriber line terminal unit 40 through the ATM switch 10 and the ATM switch 30 as a wired access system. In addition, the terminals 1 to 4 including those relaying the wireless base station 7 by wireless lines from the subscriber line terminal device 40 to the terminals 3 and 4, including the terminals 1 to 4.
4 and the AT as a wireless access system
The radio base station 9 via the M exchange 10 and the ATM exchange 20
And a route that is connected from the wireless base station 9 to the terminals 5 and 6 by relaying the wireless relay station 70 by a wireless line.

【0008】上記構成で動作中に、例えば図1中に×印
で示すように、端末2と加入者線端局装置40との間の
有線系回線で断線等の障害が生じた場合、回線を監視し
ている加入者線端局装置40の回線識別制御部41はこ
の障害を検知し、故障個所を特定して上流のATM交換
機30に、端末2と加入者線端局装置40間の故障を通
知する。この通知を受けて、ATM交換機30の回線識
別制御部31は無線回線を介した有効な加入者線端局装
置40と端末2間の接続回線を探索し、接続回線が無け
れば、ATM交換機30は更にその上流のATM交換機
10に、端末2と加入者線端局装置40間の故障を通知
する。この通知を受けてATM交換機10の回線識別制
御部11は、ATM交換機20、無線基地局9、無線中
継局70を経た無線系で端末2に至る接続回線を検索し
て設定し、ATM交換機10において、端末2に伝送す
るデータが、ATM交換機20、無線基地局9、無線中
継局70を経て端末2に伝送されるようにそのデータ
(ATMセル)の伝送先識別情報を書き換える。同時
に、この経路変更の情報を前記端末2に通知する。これ
によってデータは、加入者線端局装置40と端末2間の
障害個所を迂回して端末2に伝送される。
During operation with the above configuration, if a failure such as a disconnection occurs in a wired line between the terminal 2 and the subscriber line terminal unit 40, as indicated by a mark x in FIG. The line identification control unit 41 of the subscriber line terminal equipment 40 monitoring the failure detects the failure, specifies the location of the failure, and sends it to the upstream ATM switch 30 to send the signal between the terminal 2 and the subscriber line terminal equipment 40. Notify the failure. In response to this notification, the line identification control unit 31 of the ATM switch 30 searches for a valid connection line between the subscriber line terminal 40 and the terminal 2 via the wireless line. Notifies the upstream ATM switch 10 of a failure between the terminal 2 and the subscriber line terminal unit 40. In response to this notification, the line identification control unit 11 of the ATM switch 10 searches and sets a connection line to the terminal 2 in the wireless system via the ATM switch 20, the radio base station 9, and the radio relay station 70, and sets the line. , The transmission destination identification information of the data (ATM cell) is rewritten so that the data to be transmitted to the terminal 2 is transmitted to the terminal 2 via the ATM switch 20, the radio base station 9, and the radio relay station 70. At the same time, the terminal 2 is notified of the route change information. As a result, the data is transmitted to the terminal 2 while bypassing the point of failure between the subscriber line terminal unit 40 and the terminal 2.

【0009】同様にして、無線系のアクセス系の、例え
ば無線中継局70と端末6の間の回線障害が発生した場
合は、無線中継局70の回線識別制御部71からの通報
を受けてATM交換機10の回線識別制御部11は、A
TM交換機30、加入者線端局装置40を経た有線系で
端末6に至る接続回線を検索して設定し、 ATM交換
機10において、端末6に伝送するデータが、ATM交
換機30、加入者線端局装置40を経て端末6に伝送さ
れるようにそのデータ(ATMセル)の伝送先識別情報
を書き換える。同時に、この経路変更の情報を端末6に
通知する。これによってデータは、無線中継局70と端
末6間の障害個所を迂回して端末6に伝送される。上記
のように、本発明のアクセス系は、従来のアクセス系の
ように加入者線端局装置40に正常系と異常系を備える
必要はない。
Similarly, when a line failure occurs between the wireless relay station 70 and the terminal 6 in the access system of the wireless system, the ATM receives a report from the line identification control unit 71 of the wireless relay station 70 and outputs the ATM. The line identification control unit 11 of the exchange 10
The connection line to the terminal 6 is searched and set in a wired system via the TM exchange 30 and the subscriber line terminal 40, and the data to be transmitted to the terminal 6 in the ATM exchange 10 is transmitted to the ATM exchange 30 and the subscriber line terminal. The transmission destination identification information of the data (ATM cell) is rewritten so as to be transmitted to the terminal 6 via the station device 40. At the same time, the terminal 6 is notified of the information on the route change. As a result, the data is transmitted to the terminal 6 by bypassing the failure point between the radio relay station 70 and the terminal 6. As described above, the access system of the present invention does not require the subscriber line terminal unit 40 to have a normal system and an abnormal system as in the conventional access system.

【0010】[0010]

【発明の効果】以上説明したように、本発明に係わるア
クセス系のネットワークは、ATMの迂回機能を活用し
てユーザ端末及び交換機に有線系と無線系を常備し、一
方の系の障害発生時には他方の系を迂回経路とするよう
に構成したので、従来のように加入者線端局装置に正常
系と異常系を各回線に常設する必要はない、また飛行船
のような係留された浮遊体に無線中継局を設置するので
経済的なネットワークを構築できる。更に、有線系、無
線系の回線を同時使用して、高速広帯域の画像データの
伝送には有線系、低速データは無線系というように使い
分けることも可能で、低コストで高信頼性のネットワー
クを構築できるという著しい効果がある。
As described above, in the access network according to the present invention, the user terminal and the switchboard are provided with a wired system and a wireless system by utilizing the bypass function of the ATM. Since the other system is configured as a detour path, there is no need to permanently install a normal system and an abnormal system on each line in the subscriber line terminal equipment as in the past, and a moored floating body such as an airship An economical network can be constructed because a wireless relay station is installed in the network. Furthermore, it is possible to use a wired system and a wireless system at the same time, and to use a wired system and a low-speed data system wirelessly for high-speed broadband image data transmission. There is a remarkable effect that it can be constructed.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明に係わるアクセス系のネットワークの実
施の一形態例を示す構成概要図
FIG. 1 is a schematic configuration diagram showing an example of an embodiment of an access network according to the present invention;

【図2】従来のアクセス系のネットワークの一例を示す
構成概要図
FIG. 2 is a schematic configuration diagram showing an example of a conventional access network.

【符号の説明】[Explanation of symbols]

1〜6・・ユーザ端末 7、9・・無線基地局、8・・
係留された飛行船、20、30・・ATM交換機、 4
0・・加入者線端局装置、70・・無線中継局、11、
21、31、41、71・・回線識別制御部(以上、本
発明に係わる) 81・・交換機、 82・・加入者線端局装置、 83
・・無線基地局、84〜87・・ユーザ端末
1 to 6 user terminals 7, 9 ... wireless base station, 8 ...
Moored airship, 20, 30, ATM switch, 4
0: subscriber line terminal equipment, 70: radio relay station, 11,
21, 31, 41, 71 ··· Line identification control section (above, according to the present invention) 81 ··· Switchboard, 82 ··· Subscriber line terminal equipment, 83
..Wireless base stations, 84 to 87

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) H04Q 3/00 H04L 13/00 311 Fターム(参考) 5K021 AA08 BB08 CC11 CC14 DD02 FF01 5K030 GA12 GA19 HA10 HB21 JL01 LB08 MA04 MD02 5K035 AA05 BB02 CC08 DD01 LL11 LL17 5K072 AA22 BB02 BB25 BB27 CC03 CC31 DD16 DD17 DD20 EE36 GG01 GG11 GG14 GG26 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) H04Q 3/00 H04L 13/00 311 F term (Reference) 5K021 AA08 BB08 CC11 CC14 DD02 FF01 5K030 GA12 GA19 HA10 HB21 JL01 LB08 MA04 MD02 5K035 AA05 BB02 CC08 DD01 LL11 LL17 5K072 AA22 BB02 BB25 BB27 CC03 CC31 DD16 DD17 DD20 EE36 GG01 GG11 GG14 GG26

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】ATM技術を導入したアクセス系ネットワ
ークにおいて、ユーザ端末及びATM交換機に有線系と
無線系の接続回線を常備し、前記無線系回線は係留浮遊
体に装備された無線中継装置を介する経路とすることを
特徴とするアクセス回線の二重化方式。
In an access network incorporating an ATM technology, a user terminal and an ATM exchange always have a connection line for a wired system and a wireless system, and the wireless system line is transmitted via a wireless relay device mounted on a moored floating body. A dual access line method characterized by a route.
【請求項2】前記有線系接続回線に障害が生じたとき
は、伝送データのATMセルに付された伝送先識別情報
を書き換えることによって前記無線系接続回線を迂回経
路とし、また、前記無線系接続回線に障害が生じたとき
は、伝送データのATMセルに付された伝送先識別情報
を書き換えることによって前記有線系接続回線を迂回経
路とすることを特徴とする請求項1記載のアクセス回線
の二重化方式。
2. When a failure occurs in the wired connection line, the wireless connection line is set as a bypass route by rewriting transmission destination identification information attached to an ATM cell of the transmission data. 2. The access line according to claim 1, wherein when a failure occurs in the connection line, the wired connection line is made a bypass route by rewriting transmission destination identification information attached to the ATM cell of the transmission data. Redundant system.
JP10294347A 1998-10-16 1998-10-16 Duplexing system for access line Pending JP2000124910A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018174404A (en) * 2017-03-31 2018-11-08 西日本電信電話株式会社 Communication control apparatus, communication control method, and program

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018174404A (en) * 2017-03-31 2018-11-08 西日本電信電話株式会社 Communication control apparatus, communication control method, and program

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