JPH10500829A - 伝送システム、信号処理装置およびそれらの動作方法 - Google Patents
伝送システム、信号処理装置およびそれらの動作方法Info
- Publication number
- JPH10500829A JPH10500829A JP8519380A JP51938096A JPH10500829A JP H10500829 A JPH10500829 A JP H10500829A JP 8519380 A JP8519380 A JP 8519380A JP 51938096 A JP51938096 A JP 51938096A JP H10500829 A JPH10500829 A JP H10500829A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- vselp
- digital
- message
- processing device
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/18—Service support devices; Network management devices
- H04W88/181—Transcoding devices; Rate adaptation devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/40—Applications of speech amplifiers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
- H04M2207/18—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place wireless networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
- H04M2207/20—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place hybrid systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M3/00—Automatic or semi-automatic exchanges
- H04M3/002—Applications of echo suppressors or cancellers in telephonic connections
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13031—Pulse code modulation, PCM
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13034—A/D conversion, code compression/expansion
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13098—Mobile subscriber
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/1319—Amplifier, attenuation circuit, echo suppressor
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
- H04Q2213/13292—Time division multiplexing, TDM
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephonic Communication Services (AREA)
- Time-Division Multiplex Systems (AREA)
- Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1. ディジタル移動無線装置が相互に通信したり、無線セル・サイトを介して 公衆電話通信網と通信したり、また、移動交換局と通信することを可能にし、音 声信号のエコー消去、音声符号化/復号化、およびチャネル符号化/復号化を行 うディジタル・セルラ無線システムにおいて、 ローカル・ディジタル移動電話からの音声信号のエコー消去、音声符号化/復 号化、およびチャネル符号化/復号化を行う第1のディジタル信号処理装置と、 リモート・ディジタル移動電話からの音声信号のエコー消去、音声符号化/復 号化、およびチャネル符号化/復号化を行う第2のディジタル信号処理装置と、 帯域内信号情報をリモート・ディジタル信号処理装置に送信するメッセージ送 信機と、 ローカル・ディジタル信号処理装置で帯域内信号情報を検出するメッセージ受 信機と、 前記リモート・メッセージ送信機からローカル・メッセージ受信機への個別線 信号情報の送信を監視する制御装置であって、前記ローカル・メッセージ受信機 によって、前記リモート・メッセージ送信機からの帯域内信号情報の検出が行わ れ、ディジタル移動局間の接続が確立した場合、前記第1および第2のディジタ ル信号処理装置がバイパス・モードへの切り換えを行い、前記音声符号化/復号 化、およびエコー消去機能をバイパスすることによって、前記ディジタル移動無 線装置各々が相互に直接、前記チャネル符号化/復号化機能により、VSELP 形式で音声信号をやり取りする制御装置とを備えることを特徴とするディジタル ・セルラ無線システム。 2. 前記第1および第2のディジタル信号処理装置間の通信は、移動局ユーザ 音声信号、および帯域内信号情報を含むことを特徴とする請求項1記載のディジ タル・セルラ無線システム。 3. 前記音声信号、および帯域内信号情報は、非VSELPモードのときには 、 PCM・シーケンスとして送信され、エコー消去および音声コーデック・バイパ ス・モードのときには、VSELP信号フレームの形式で送信されることを特徴 とする請求項2記載のディジタル・セルラ無線システム。 4. 前記PCM・シーケンスは、8ビットのPCM・シーケンスを含み、前記 VSELP信号フレームは、64kbsのデータ・ストリームに拡大したVSE LP信号を含むことを特徴とする請求項3記載のディジタル・セルラ無線システ ム。 5. 複数の音声信号フレームを介して、ユーザ音声信号ビットをPCM・メッ セージのビットに置き換えることによって、PCM帯域内信号が得られることを 特徴とする請求項3記載のディジタル・セルラ無線システム。 6. 前記PCM帯域内信号情報は、少くとも、ディジタル信号処理装置の識別 子メッセージ、およびディジタル信号処理装置応答メッセージの内の1つを含む ことを特徴とする請求項5記載のディジタル・セルラ無線システム。 7. 前記ユーザ音声信号ビットの置き換えは、あらかじめ選択した間隔で行わ れ、その間隔は、バイパス・モードへの切り換えに要する時間遅延を減らすよう 十分小さく、また、受信側でのPCM信号への知覚的な影響を最小にするよう十 分大きいことを特徴とする請求項6記載のディジタル・セルラ無線システム。 8. 前記あらかじめ選択した間隔は、20個のサンプルごとに1ビットの間隔 であることを特徴とする請求項7記載のディジタル・セルラ無線システム。 9. 前記DSP識別子とDSP応答メッセージは、複数の音声信号フレームを 介して、16個のユーザ音声信号ビットをメッセージ・ビットに置き換えること によって作成されることを特徴とする請求項8記載のディジタル・セルラ無線シ ステム。 10.リモート・ディジタル信号処理装置の存在は、前記メッセージ受信機にお いて、着信DSP識別子を受信することで確認されることを特徴とする請求項2 記載のディジタル・セルラ無線システム。 11.リモート・メッセージ送信機から送信されたDSP応答メッセージが、ロ ーカル・メッセージ受信機で繰り返して受信されたときに、前記音声復号化機能 がバイパスされ、また、前記ローカル・メッセージ受信機で前記VSELP情報 が受信されたときに、前記音声符号化機能がバイパスされることを特徴とする請 求項10記載のディジタル・セルラ無線システム。 12.前記音声符号化/復号化機能は、リモート・メッセージ送信機より送信さ れたVSELP情報が、ローカル・メッセージ受信機で受信されたときにバイパ スされることを特徴とする請求項10記載のディジタル・セルラ無線システム。 13.VSELPバイパス・モードから非VSELPバイパス・モードへの移行 があると、二乗コサイン・ウィンドウによってPCMサンプルを換算することに よって、円滑な遷移を達成することを特徴とする請求項11記載のディジタル・ セルラ無線システム。 14.VSELPバイパス・モードから非VSELPバイパス・モードへの移行 があると、前記音声符号化/復号化機能をリセットすることによって、円滑な遷 移を達成することを特徴とする請求項13記載のディジタル・セルラ無線システ ム。 15.メッセージ送信機が動作しないよう前記制御装置に指示を送ることによっ て、バイパス・モードを終了できることを特徴とする請求項11記載のディジタ ル・セルラ無線システム。 16.VSELP信号の各フレームは、VSELP信号の識別用にフレームごと に繰り返されるVSELPメッセージ、VSELP符号化されたユーザ情報、チ ェックサム、そして、劣性PCMサンプルの固定パターンを含むことを特徴とす る請求項4記載のディジタル・セルラ無線システム。 17.前記VSELP符号化されたユーザ情報は、入出力バッファの重要度が最 小のエントリに書き込まれることを特徴とする請求項16記載のディジタル・セ ルラ無線システム。 18.前記第2のディジタル信号処理装置に、CRCの状態情報を有する前記V SELP信号を送信し、続いて、CRCの連続的な失敗の最初の番号に対応する 前記リモート・ディジタル移動電話に、計算されたCRCの1の補数を有する前 記VSELP信号を送信して、リモート・ディジタル移動電話にCRCエラーの 警告をすることによって、前記ローカル・ディジタル移動電話から到着する信号 より、前記リモート・ディジタル移動電話に、前記第1のDSPにおけるCRC エラーの発生を警告することを特徴とする請求項3記載のディジタル・セルラ無 線システム。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/358,949 | 1994-12-19 | ||
US08/358,949 US5768308A (en) | 1994-12-19 | 1994-12-19 | System for TDMA mobile-to-mobile VSELP codec bypass |
PCT/CA1995/000704 WO1996019907A1 (en) | 1994-12-19 | 1995-12-13 | System for tdma mobile-to-mobile vselp codec bypass |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000020587A Division JP2000232409A (ja) | 1994-12-19 | 2000-01-28 | 伝送システムおよびその動作方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH10500829A true JPH10500829A (ja) | 1998-01-20 |
JP3638609B2 JP3638609B2 (ja) | 2005-04-13 |
Family
ID=23411692
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP51938096A Expired - Lifetime JP3638609B2 (ja) | 1994-12-19 | 1995-12-13 | デジタル信号処理装置 |
JP2000020587A Pending JP2000232409A (ja) | 1994-12-19 | 2000-01-28 | 伝送システムおよびその動作方法 |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2000020587A Pending JP2000232409A (ja) | 1994-12-19 | 2000-01-28 | 伝送システムおよびその動作方法 |
Country Status (8)
Country | Link |
---|---|
US (3) | US5768308A (ja) |
EP (1) | EP0799554B1 (ja) |
JP (2) | JP3638609B2 (ja) |
CN (2) | CN1487679A (ja) |
CA (2) | CA2207550C (ja) |
DE (1) | DE69528847T2 (ja) |
MX (1) | MX9704512A (ja) |
WO (1) | WO1996019907A1 (ja) |
Cited By (1)
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1994
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- 1995-12-13 DE DE69528847T patent/DE69528847T2/de not_active Expired - Lifetime
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR100316578B1 (ko) * | 1998-05-08 | 2001-12-12 | 가네꼬 히사시 | 반도체 장치 및 그 반도체 장치의 제조 방법 |
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CN1170492A (zh) | 1998-01-14 |
CA2207550A1 (en) | 1996-06-27 |
DE69528847D1 (de) | 2002-12-19 |
US5768308A (en) | 1998-06-16 |
CA2732583A1 (en) | 1996-06-27 |
WO1996019907A1 (en) | 1996-06-27 |
CN1487679A (zh) | 2004-04-07 |
EP0799554A1 (en) | 1997-10-08 |
US7023819B2 (en) | 2006-04-04 |
CN1123253C (zh) | 2003-10-01 |
CA2732583C (en) | 2012-09-04 |
CA2207550C (en) | 2011-05-03 |
JP3638609B2 (ja) | 2005-04-13 |
JP2000232409A (ja) | 2000-08-22 |
MX9704512A (es) | 1997-10-31 |
DE69528847T2 (de) | 2003-03-20 |
US6185424B1 (en) | 2001-02-06 |
EP0799554B1 (en) | 2002-11-13 |
US20020054571A1 (en) | 2002-05-09 |
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