JPH03502991A - 光通信回路網 - Google Patents
光通信回路網Info
- Publication number
- JPH03502991A JPH03502991A JP63509472A JP50947288A JPH03502991A JP H03502991 A JPH03502991 A JP H03502991A JP 63509472 A JP63509472 A JP 63509472A JP 50947288 A JP50947288 A JP 50947288A JP H03502991 A JPH03502991 A JP H03502991A
- Authority
- JP
- Japan
- Prior art keywords
- customer
- network
- optical
- bits
- frame
- 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.)
- Granted
Links
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0635—Clock or time synchronisation in a network
- H04J3/0682—Clock or time synchronisation in a network by delay compensation, e.g. by compensation of propagation delay or variations thereof, by ranging
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/27—Arrangements for networking
- H04B10/272—Star-type networks or tree-type networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/08—Time-division multiplex systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/06—Synchronising arrangements
- H04J3/0602—Systems characterised by the synchronising information used
- H04J3/0605—Special codes used as synchronising signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
- H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
Abstract
Description
Claims (9)
- (1)ビットの予め定められたパターンの形態で同期信号を含む同期部分をそれ ぞれ含むフレームの流れの形態でアウトステーションにデータを送信するように 構成さたデジタル通信回路網用の中央ステーションにおいて、中央ステーション は予め定められた2進シーケンスにしたがってフレームをスクランプルするスク ランプル手段と、スクランプルされた同期部分に隣接したスクランプルされたフ レームの少なくとも一部の中の連続したn番目のビットを反転するがスクランプ ルされた同期部分自身の中の連続したn番目のビットを反転せず、それによって 同期部分に隣接したフレームの前記部分の中のビットの同一パターンによる同期 の誤認を阻止する手段とを含む中央ステーション。
- (2)各フレームはアウトステーション用の管理データを含む第1の部分および 前記同期部分を含み、またアウトステーション用のメッセージデータを含む第2 の部分を含み、反転手段は各フレームの第1の部分の中の管理データの連携した n番目のビットだけを反転するように構成されている請求項1記載の中央ステー ション。
- (3)スクランプル手段は第1の予め定められた2進シーケンスにしたがってフ レームの第1の部分の内容をスクランプルするように構成された第1のスクラン ブラと、第2の予め定められた2進シーケンスにしたがってフレームの第2の部 分の内容をスクランプルするように構成された第2のスクランブラとを含む請求 項2記載の中央ステーション。
- (4)スクランプル手段の第1および第2のスクランブラは単一の予め定められ た2進シーケンス発生器を共有し、発生器のシフトレジスタの各タップを使用す る請求項3記載の中央ステーション。
- (5)nは16である請求項1乃至4のいずれか1項記載の中央ステーション。
- (6)請求項1記載の中央ステーションからフレームを受信するように構成され たデジタル通信回路網用のアウトステーションにおいて、 予め定められた2進シーケンスにしたがってフレームをデスクランプルするデス クランプル手段と、デスクランプル手段の出力中の同期信号を識別する手段と、 反転されたn番目のビットを訂正してそれによって前記スクランプルされたフレ ームの前記少なくとも一部の元の形態を再構成するように構成された手段とを含 むアウトステーション。
- (7)デスクランプル手段は、前記識別手段に結合された自己同期デスクランブ ラと、前記第1の予め定められた2進シーケンスにしたがってフレームの第1の 部分の内容をデスクランブルする別のデスクランブラと、前記第2の予め定めら れた2進シーケンスにしたがってフレームの第2の部分の内容をデスクランプル するさらに別のデスクランブラとを含む請求項3記載の中央ステーションからフ レームを受信するように構成された請求項6記載のアウトステーション。
- (8)前記別のおよびさらに別のデスクランブラは単一の2進シーケンス発生器 を共有し、発生器のシフトレジスタの各タップを使用する請求項7記載の中央ス テーション。
- (9)請求項1記載の中央ステーションと、請求項6記載の複数のアウトステー ションと、およびそれぞれ同期信号を含む放送フレーム流の形態でアウトステー ション用の多重化された信号を使用の際に伝送する中央ステーションとアウトス テーションとの間のブランチ構造とを具備するデジタル通信回路網において、前 記回路網は特に復帰信号用の前記送信媒体上または類似した送信媒体上に復帰フ レーム流で受動的に多重化されるようにアウトステーションからの復帰信号に適 合され、アウトステーションから中央ステーションに復帰する信号の同期を行う ために、中央ステーションはアウトステーションに第1の信号を送信する手段と 、各第2の信号に対する各遅延を計算して各遅延を表すアウトステーションに各 第3の信号を送信するためにアウトステーションからの各第2の信号の受信の時 間に応答する手段とを含み、各アウトステーションは受信された同期信号と予め 定められた関係で前記第2の信号を送信するために前記第1の信号の受信に応答 する手段と、適切な量だけ前記第2の信号の送信を遅延するために前記第3の信 号に対応する手段とを含み、それによって全ての送信アウトステーションからの 第2の信号が中央ステーションで同時に受信され、効果的に復帰多重化信号に対 する単一の同期信号を形成するデジタル通信回路網。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB878727846A GB8727846D0 (en) | 1987-11-27 | 1987-11-27 | Optical communications network |
GB8727846 | 1987-11-27 | ||
PCT/GB1988/001038 WO1989005077A1 (en) | 1987-11-27 | 1988-11-28 | Optical communications network |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03502991A true JPH03502991A (ja) | 1991-07-04 |
JPH0681128B2 JPH0681128B2 (ja) | 1994-10-12 |
Family
ID=10627657
Family Applications (4)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1500079A Expired - Fee Related JPH0821959B2 (ja) | 1987-11-27 | 1988-11-28 | 光通信回路網 |
JP1500078A Expired - Lifetime JP2780832B2 (ja) | 1987-11-27 | 1988-11-28 | 光通信回路綱の動作方法 |
JP1500072A Expired - Lifetime JPH0716171B2 (ja) | 1987-11-27 | 1988-11-28 | 光通信回路網 |
JP63509472A Expired - Lifetime JPH0681128B2 (ja) | 1987-11-27 | 1988-11-28 | 光通信回路網 |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1500079A Expired - Fee Related JPH0821959B2 (ja) | 1987-11-27 | 1988-11-28 | 光通信回路網 |
JP1500078A Expired - Lifetime JP2780832B2 (ja) | 1987-11-27 | 1988-11-28 | 光通信回路綱の動作方法 |
JP1500072A Expired - Lifetime JPH0716171B2 (ja) | 1987-11-27 | 1988-11-28 | 光通信回路網 |
Country Status (13)
Country | Link |
---|---|
US (4) | US5173899A (ja) |
EP (4) | EP0318331B1 (ja) |
JP (4) | JPH0821959B2 (ja) |
AT (4) | ATE91362T1 (ja) |
CA (4) | CA1337996C (ja) |
DE (4) | DE3883716T2 (ja) |
DK (4) | DK129890D0 (ja) |
ES (4) | ES2043850T3 (ja) |
FI (4) | FI107204B (ja) |
GB (1) | GB8727846D0 (ja) |
HK (4) | HK130696A (ja) |
NO (4) | NO302728B1 (ja) |
WO (4) | WO1989005069A1 (ja) |
Families Citing this family (349)
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