JPH0319441A - Reply timing control type arq system - Google Patents
Reply timing control type arq systemInfo
- Publication number
- JPH0319441A JPH0319441A JP1152238A JP15223889A JPH0319441A JP H0319441 A JPH0319441 A JP H0319441A JP 1152238 A JP1152238 A JP 1152238A JP 15223889 A JP15223889 A JP 15223889A JP H0319441 A JPH0319441 A JP H0319441A
- Authority
- JP
- Japan
- Prior art keywords
- reception level
- level
- reception
- ack
- nak
- 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.)
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- 238000001514 detection method Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 11
- 238000000034 method Methods 0.000 description 6
- 238000010295 mobile communication Methods 0.000 description 3
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- 238000004891 communication Methods 0.000 description 2
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Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、データ再送伝送方式に関し、待に、移動通信
等の７エーソングの影響を受ける熊線ａ信方式の高効牢
データ伝送に係る．
〔従来の技術〕
移動通信のように７ヱーノングの影響を受ける無線通信
方式において、 高品質なディノタル伝送を実現する方
法として、信号再送方式（ＡＲＱ）があった（本明＃Ｉ
Ｉ！においては信号再送方式をＡＲＱという）。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a data retransmission transmission system, and more specifically to high-efficiency data transmission of the bear line a transmission system, which is affected by the 7A song of mobile communications, etc. ．． [Prior art] Signal retransmission (ARQ) has been used as a method to achieve high-quality digital transmission in wireless communication systems that are affected by 7-bit noise, such as mobile communications.
I! The signal retransmission method is called ARQ).
第５図は、従米のＡＲＱを示す概念図である．同図にお
いて、ＴＸは送信側、ＲＸは受Ｍ側、Ｌは受信レベル、
１−１．１−２は１番目の送信ブロックデータ、１’−
１．１’−２は１番目の受信プロックデー夕、２−１．
２−２は２番目の送信プロックデーク、２’−１．２’
−２は２番目の受信ブロックデータ、３は３番目の送信
プａツクデータ、３′は３番目の受信ブａツクデータ、
ＥＲは誤りが検出されたブロックデータ、ＲＥは再送す
るプロックデータを示している．
通常のＡＲＱでは、送信データを数１００ビットの長さ
を持つ複数のブロックに分割してブロックごとに伝送し
、受信されたブロックデー夕に誤りが検出されないとき
は、受信儒からデータが正しく受信されたことを示す応
答信号（ＡＣＫ）を送信側に送信し、これに応じて送信
側から次ブロックが送信される．
一方、受信されたブロックデータに誤りが検出されたと
きはデータに誤りがあったことを示す応答信号（Ｎ Ａ
Ｋ ）を送信側に送信し、これに対して送信側からそ
のプロックデータの再送が行なわれる．
第５図では、受信ブロックデータ１′−１２′−１およ
び３′−１のすべてにおいて受信レベルが低下して誤り
が発生し、当該ブロックデータが１−２ １−３．
２−２等として再送されている様子が示されている．
このように、ＡＲＱでは、誤りの検出されたブロックを
再送することに上り誤りなく送信データが伝送できる．
〔発明が解決しようとする課題〕
上述したような通常のＡＲＱは伝送路の状態が比較的安
定している場合には大きな効果を有するが、これを受信
レベルの変動が大きく、しかも早いピッチで変動するよ
うな移動通信に適用した場合、受信ブロックデータの誤
りが多く発生するため再送回数が増加して、伝送効率が
非常に低下するという欠点があった．
本発明は、このような従未の間ｍ点に置み、受信レベル
の変動が大きく、また、早いピッチでレベル変動する場
合であっても、従米のＡＲＱよりも効率の良いデータ伝
送を可能とする熊線通信方式を提供することをａ的とし
ている．〔課題を解決するための手段〕
本発明によれば、上述の目的は、前記特許請求の範囲に
記載した手段に上り達威される．すなわち、本発明は、
送信側から送信されたブロックデータが受信側で正しく
受信されたときは、受信側より送信側に対して、ＡＣＫ
によって応答し、一方、受信データに誤りが検出された
ときには、ＮＡＫによって、応答し、これを受けた送信
側が当該データの再送を行なうごとく制御される信号伝
送方式（ＡＲＱ）において、受信鋼に受信信号レベルを
ｆＬ視する手段を設けるとともに、受信レベルがしきい
値より小であるとき受信レベルが該しきい値を越えるま
で、ＡＣＫあるいはＮＡＫの退出を抑止する手段と、受
信レベルがしきい値より小であるか、あるいは受信レベ
ルの変動が減少傾向であるとき、受信レベルがしきい値
を越え、受信レベルの変動が増加傾向に転ずるまで、Ａ
ＣＫあるいはＮＡＫの送出を抑止する手段の内、少なく
とも一方の手段を設けた応答タイミング制御型ＡＲＱ方
式？ある．
〔作 用〕
本発明においては、受信側で受信レベルを監視していて
、送信糊に対するＡＣＫ＊たはＮＡＫを受信状態の良好
なときに伝送しているので、これに対して次に送信され
るプロックデー夕を高い受信レベルで受信することがで
きるから、受信ブロックデータが誤りとなる回数が減少
する．
したがって、従米のＡＲＱよ９再送回数が低減し、高効
率なデータ伝送が実現できる．〔実施例〕
第１図は、本発明の弟１の実施例を説明するための概念
図である．
図中の記号等は先に説明した＃１５図と同様であり，Ｔ
Ｈはしきい値を表わしている．同図ＲＸ （受信１＄１
）において、１番目の受信ブロックデータ１′−１に誤
りが検出され、ＮＡＸをＴＸ （送信ＩＮ＞に送信する
ために受信レベルＬとしきい値Ｔ Ｈを比較する，この
とき図中に芙字符Ａで示すように受信レベルＬがしきい
値ＴＨ上りも小さい（Ｌ＜ＴＨ）ためＮＡＫの送出を抑
止して待機させ、図中に英字ｔｆＢ’ｃ’示すようにＬ
ＡＴＨとなったとき送信側に送信する．
送信側は、該ＮＡＫを受信すると直ちに送信ブロックデ
ー夕を１−２で示すように再送する．再送された１番目
の受信プロックデータ１′２が誤りなく受信され、この
とき受信レベルＬが図に英字符Ｃで示す上うにＬ＞ＴＨ
の条件を満たすときには、ただちにＡＣＫを送信する．
送信側はＡＣＫを受信すると直ぐに次の送信ブロックデ
ータ２を送信する．
次に、受信ブロックデータ２′が誤りなく受信され、こ
のとき図中に英字符Ｄ′１′示すようにＬ＞ＴＨであれ
ば送信鯛へ直ちにＡＣＫを送信する．送信側は該ＡＣＫ
を受信すると直ちに送信ブロックデータ３−１を送信す
る．受信プロックデータ３′−１では誤りが検出され、
このとき図中に英字符Ｅで示すようにＬＡＴＨであれば
、ただちにＮＡＫを送信する．
以降、このような動作を繰り返して送信プロ，クデータ
とＡ Ｃ Ｋ／Ｎ Ａ Ｋを送受信する．また、第２図
は、第１の実施例の受信側の構成の例を示すブロック図
である（データの送信側は従未のＡＲＱと同一の構虞と
すればよいので省略する）．
第２図において、受信ｆｉ１１から復調データが復調出
力靖子１２に出力され、演算制１１ｆｉｌ５はこの復調
データについて誤り検出を行なう．このような誤り検出
にはパリテイチェックやＢＣＨ符号を用いるような公知
の方法を用いればよい．
演鼻制御部１５は復調データに誤りがなければデータ出
力屠子１６にその正しいブロックデータを出力する．こ
のとき、受信レベル監視部１４は受信１９１１１の受信
レベル出力靖子１３よ９受信レベルを受け取り、これを
しきい値と比較する．演算制御部１５は、受信レベル監
視部１４よ９比較結果を受け取るが、その比較結果情報
が受信レベルがしきい値上９大きいときは（当該データ
ブロックが正しく受信できているので）次ブロックデー
タの要求を表わすＡＣＫを送信？ｊ１１１に出力して送
信側に通知する．一方、受信レベルがしきい値よりも小
さいときはＡＣＫ信号を待機させ、受信レベル監視部１
４よワ比較結果情報を受信し続け、受信レベルがしきい
値よりも大きくなったときにＡＣＫを送信機１７に出力
する．
また、復調データに誤りが検出されたときは、演算制御
部１５は、受信レベル監視部１４より受信レベルとしき
い値との比較結果を受け取り、受信レベルがしきい値よ
りも大きい時は、同一ブロックの再送要求を表わすＮＡ
Ｋを送信槻１７に出力し送信側に通知する．また、受信
レベルがしきい値よりも小さいときはＮＡＫの送出を抑
止して待機させ、受信レベル監視ｎ１４よ９比較結果を
受信し続け、受信レベルがしきい値よりも大きくなった
ときにＮＡＫを送信機１７に出力する．
また、受信側にブロックデータとビットごとの受信レベ
ルを記慎させ、再送されたデータについて、その前に受
信した同一のブロックデータとの間で時闇グイパーシチ
処理を行なうことによりさらに高信頼度にすることがで
きる．時間グイバーンチ処理は従米の公知の方法をもち
いればよい．
第３図は本発明の弟２の実施例を説明するための概念図
である．
同図の受信側において、１番目の受信ブロックデータ１
′−１に誤りが検出され、 ＮＡＫを送信側に送信する
ために受信レベルＬとしきい値ＴＨを比較し、さらに受
信レベル変化量Ｌ′を計算する．このとき図中に芙字符
Ｆで示すように受信レベルＬがしきい値ＴＨよりも小さ
い（ＬＡＴＨ）ときはＮＡＫの送出を抑止して待機させ
、ＬＡＴＨであって、かつ、受信レベル変化量Ｌ′−１
が正（Ｌ’−１＞０）になったとき送信側に送信する．
送信側はＮＡＫを受信するとただちにブロックデータ１
−２を再送する．再送された１番目の受信ブロックデー
タ１′−２が誤りなく受信され、このとき受信レベルＬ
が図中に英字符Ｇで示すようＬＡＴＨを満たし、かつ受
信レベルの変化Ｌ′−２が（Ｌ’−２＞０）を満たすた
め、ただちにＡＣＫを送信側へ送信する．
送信側はＡＣＫを受信するとすぐに次の送信プロックデ
ータ２を送信する．＊に、２番目の受信ブロックデータ
２′は誤りなく受信されたが、図中にＬ’−３で示され
るように、受信レベル変化量が（Ｌ’−３＜０）である
ためＡＣＫを待機させ、図中に芙字杵Ｈで示すように、
ＬＡＴＨかっ（Ｌ’−３＞Ｏ）となったとき 送信側へ
送信する．送信側はＡＣＫを受信すると直ちに、次の送
信プａツクデータ３を送信する８以降、このような動作
を繰り返して送信プロックデータとＡ Ｃ Ｋ／Ｎ Ａ
Ｋを送受信する．第４図は、第２の実施例の受信側の
構威を示すブロック図である （データの送信側は、従
米のＡＲＱと同一の構威とすればよいので省略する）．
第４図において、受信機２１からの復調データは復調出
力端子２２に出力され、演算制御部２５において誤り検
出が行なわれる．
該演算制御部２５は復調データに誤ηがなければデータ
出力靖子２６にその正しいブロックデータを出力する．
このとき受信レベル監視部２４は受信レベル出力端子２
３よ９受信レベルを受け取り、しきい値と比較する．ま
た、受信レベル変化監視部２８も受信レベル出力端子２
３より同様に受信レベルを受け取り、その変化量を演算
制御Ｗ６２５に出力する．
演算制御ＭＳ２５は、受信レベル監視部２４からの比較
結果と受信レベル変化監視部２８からの受信レベル変化
量を調べで、受信レベルがしきい値より大きく、かつ受
信レベル変化量が正のときは当該データブロックが正し
く受信できたので、次ブロックデータを要求する旨を表
わすＡＣＫを送信機２７に出力し送信側に通知する．
一方、受信レベルがしきい値よりも小さいか、あるいは
受信レベル変化量が負のときはＡＣＫ信号の送出を抑止
しで待機させ、受信レベル監視部２４からの比較結果と
受信レベル変化監視ｓ２８からの受信レベル変化量を監
視しでいて、受信レベルがしきい値よりも大きく、かつ
受信レベル変化量が正になったときにＡＣＫを送信磯２
７に出力する．
また、復調データに誤りが検出されたときは、演算制御
部２５は、受信レベル監視部２４からの比較結果と受信
レベル監視部２８からの受信レベル変化量を調べて、受
信レベルがしきい値よりも大きく、かつ受信レベル変化
量が正のときは同一ブロックの再送要求を表わすＮＡＫ
を送信隔２７に出力し送信側に通知する．また、受信レ
ベルがしきい値よりも小さいか、あるいは受信レベル変
化量が負のときはＮＡＫ信号の退出を抑止して待機させ
、受信レベル監視部２４からの受信レベルとしきい値と
の比較結果と、受信レベル変化量監視ＷＳ２８からの受
信レベル変化量に係る情報を受信し続け、受信レベルが
しきい値よりも大きく、かつ受信レベル変化量が正にな
ったときにＮＡＫを送信８！２７に出力する．
この実施例の場合も第１の実施例と同様に時間グイパー
ンチを併用することによってさらに高い信頼度を得るこ
とができる．
〔発明の効果〕
以上説明したように、本発明では、送信ブロックデータ
を受信条件の良いときに伝送できるから、受信ブロック
データの誤りが少なくなり、従米上りも高効率なディノ
タルデータ伝送を行なうことができる利点がある．Figure 5 is a conceptual diagram showing the ARQ of Jumei. In the figure, TX is the transmitting side, RX is the receiving side, L is the receiving level,
1-1.1-2 is the first transmission block data, 1'-
1.1'-2 is the first reception block data, 2-1.
2-2 is the second transmission block data, 2'-1.2'
-2 is the second received block data, 3 is the third transmitted block data, 3' is the third received block data,
ER indicates block data in which an error was detected, and RE indicates block data to be retransmitted. In normal ARQ, transmitted data is divided into multiple blocks each having a length of several 100 bits and transmitted block by block, and if no errors are detected in the received block data, the data is correctly received from the received data. A response signal (ACK) indicating that the block has been received is transmitted to the transmitting side, and in response, the transmitting side transmits the next block. On the other hand, when an error is detected in the received block data, a response signal (N A
K) is transmitted to the transmitting side, and in response, the transmitting side retransmits the block data. In FIG. 5, the reception level decreases and errors occur in all of the received block data 1'-12'-1 and 3'-1, and the block data 1-2, 1-3, .
It shows how it is retransmitted as 2-2 etc. In this way, in ARQ, blocks in which errors have been detected are retransmitted, and transmission data can be transmitted without errors. [Problems to be Solved by the Invention] Normal ARQ as described above has a great effect when the transmission path condition is relatively stable, but this is difficult to achieve when the received level fluctuates widely and at a fast pitch. When applied to mobile communications where fluctuations occur, the disadvantage is that many errors occur in received block data, increasing the number of retransmissions and greatly reducing transmission efficiency. The present invention is placed at point m between these conventional methods, and enables data transmission to be performed more efficiently than conventional ARQ even when the reception level fluctuates widely and at a fast pitch. The aim is to provide a bear line communication system that will [Means for Solving the Problems] According to the present invention, the above-mentioned objects are achieved by the means described in the claims. That is, the present invention
When the receiving side correctly receives the block data sent from the sending side, the receiving side sends an ACK to the sending side.
On the other hand, when an error is detected in the received data, it responds with NAK, and in the signal transmission method (ARQ), the transmitting side that receives this is controlled to retransmit the data. A means for checking the signal level as fL is provided, and a means for suppressing the exit of ACK or NAK until the reception level exceeds the threshold when the reception level is lower than the threshold; A is smaller than A, or when the fluctuation in the received level is on a decreasing trend, until the received level exceeds the threshold and the fluctuation in the received level starts to increase.
A response timing controlled ARQ method that includes at least one of the means to suppress the sending of CK or NAK? be. [Function] In the present invention, since the receiving side monitors the reception level and transmits the ACK* or NAK for the transmission when the reception condition is good, the next transmission in response to this monitors the reception level. Since block data can be received at a high reception level, the number of errors in received block data is reduced. Therefore, the number of retransmissions is reduced compared to conventional ARQ, and highly efficient data transmission can be achieved. [Embodiment] FIG. 1 is a conceptual diagram for explaining a first embodiment of the present invention. Symbols etc. in the figure are the same as those in figure #15 explained earlier, and T
H represents the threshold. Same figure RX (reception 1$1
), an error is detected in the first received block data 1'-1, and in order to transmit NAX to TX (transmission IN>), the reception level L and threshold value TH are compared. As shown in A, since the reception level L is smaller than the threshold value TH (L<TH), sending of NAK is suppressed and the wait is made, and L as shown in the alphabet tfB'c' in the figure
Sends to the sending side when ATH is reached. Immediately upon receiving the NAK, the transmitting side retransmits the transmission block data as shown by 1-2. The retransmitted first reception block data 1'2 is received without error, and at this time, the reception level L becomes L>TH as shown by the alphabet C in the figure.
When the conditions are met, an ACK is immediately sent.
Immediately upon receiving the ACK, the transmitting side transmits the next transmission block data 2. Next, when the received block data 2' is received without error, and at this time, as shown by the alphabet D'1' in the figure, if L>TH, an ACK is immediately transmitted to the transmitting sea bream. The sending side receives the corresponding ACK
Immediately upon receiving , it transmits transmission block data 3-1. An error is detected in the received block data 3'-1,
At this time, if it is LATH, as indicated by the letter E in the diagram, a NAK is immediately sent. Thereafter, such operations are repeated to transmit and receive ACK/NAK with the transmitter and data. Further, FIG. 2 is a block diagram showing an example of the configuration of the receiving side of the first embodiment (the data transmitting side is omitted because it can have the same configuration as the conventional ARQ). In FIG. 2, demodulated data is output from the receiving fi 11 to the demodulated output Yasuko 12, and the arithmetic system 11 fil5 performs error detection on this demodulated data. For such error detection, a known method such as a parity check or a BCH code may be used. If there is no error in the demodulated data, the nose controller 15 outputs the correct block data to the data output controller 16. At this time, the reception level monitoring unit 14 receives the reception level output Yasuko 13-9 of the reception 19111, and compares this with the threshold value. The arithmetic control unit 15 receives the comparison result from the reception level monitoring unit 14, and if the comparison result information indicates that the reception level is 9 higher than the threshold value (because the data block has been correctly received), the next block data is Send an ACK representing the request? j111 to notify the sending side. On the other hand, when the reception level is smaller than the threshold, the ACK signal is put on standby, and the reception level monitoring unit 1
4 continues to receive the comparison result information and outputs ACK to the transmitter 17 when the reception level becomes greater than the threshold value. Further, when an error is detected in the demodulated data, the arithmetic control unit 15 receives the comparison result between the reception level and the threshold value from the reception level monitoring unit 14, and when the reception level is greater than the threshold value, the NA representing block retransmission request
K is output to the transmitter 17 and notified to the transmitting side. Also, when the reception level is lower than the threshold, NAK transmission is suppressed and the NAK is put on standby, reception level monitoring n14-9 comparison results are continued to be received, and NAK is sent when the reception level becomes higher than the threshold. is output to the transmitter 17. In addition, the receiving side records the block data and the reception level for each bit, and the retransmitted data is subjected to time-difference analysis processing between the previously received identical block data, thereby further increasing reliability. can do. Time guide processing can be done using Jubei's well-known method. FIG. 3 is a conceptual diagram for explaining the second embodiment of the present invention. On the receiving side in the same figure, the first received block data 1
An error is detected at '-1, and in order to send a NAK to the transmitting side, the received level L is compared with the threshold TH, and the received level change amount L' is calculated. At this time, as shown by the square mark F in the figure, when the reception level L is smaller than the threshold TH (LATH), the transmission of NAK is suppressed and the system is placed on standby. '-1
When becomes positive (L'-1>0), it is sent to the sending side. When the sending side receives the NAK, it immediately sends block data 1.
-2 is retransmitted. The retransmitted first received block data 1'-2 is received without error, and at this time the reception level is L.
satisfies LATH as indicated by the letter G in the figure, and the change in reception level L'-2 satisfies (L'-2>0), so ACK is immediately sent to the transmitting side. As soon as the transmitting side receives the ACK, it transmits the next transmission block data 2. *, the second received block data 2' was received without error, but as shown by L'-3 in the figure, the amount of change in the reception level was (L'-3<0), so ACK was not received. Wait, and as shown by H in the figure,
When LATH (L'-3>O) is reached, send to the sending side. Immediately upon receiving the ACK, the transmitting side transmits the next transmit block data 3. From 8 onwards, it repeats this operation to transmit the transmit block data and ACK/N A.
Send and receive K. FIG. 4 is a block diagram showing the configuration of the receiving side of the second embodiment (the data transmitting side is omitted because it can have the same configuration as the conventional ARQ). In FIG. 4, demodulated data from a receiver 21 is output to a demodulation output terminal 22, and error detection is performed in an arithmetic control section 25. The arithmetic control unit 25 outputs the correct block data to the data output Yasuko 26 if there is no error η in the demodulated data.
At this time, the reception level monitoring section 24 outputs the reception level at the reception level output terminal 2.
3-9 Receive the reception level and compare it with the threshold. Further, the reception level change monitoring section 28 also receives the reception level output terminal 2.
3, similarly receives the reception level and outputs the amount of change to the arithmetic control W625. The arithmetic control MS 25 checks the comparison result from the reception level monitoring section 24 and the reception level change amount from the reception level change monitoring section 28, and when the reception level is larger than the threshold value and the reception level change amount is positive, Since the data block has been correctly received, an ACK indicating that the next block data is requested is output to the transmitter 27 and the transmitting side is notified. On the other hand, when the reception level is smaller than the threshold or the reception level change amount is negative, the transmission of the ACK signal is suppressed and the system is put on standby, and the comparison result from the reception level monitoring section 24 and the reception level change monitoring s28 are used. ACK is sent when the received level is greater than the threshold and the received level change is positive.
Output to 7. Furthermore, when an error is detected in the demodulated data, the arithmetic control unit 25 checks the comparison result from the reception level monitoring unit 24 and the amount of change in reception level from the reception level monitoring unit 28, and determines whether the reception level is the threshold value. NAK indicating a retransmission request for the same block when the amount of change in reception level is greater than , and the amount of change in reception level is positive.
is output to the transmission interval 27 and notified to the sending side. In addition, when the reception level is smaller than the threshold or the amount of change in the reception level is negative, exit of the NAK signal is suppressed and the signal is put on standby, and the result of comparing the reception level from the reception level monitoring unit 24 with the threshold is Then, it continues to receive information related to the amount of change in the reception level from the reception level change amount monitoring WS 28, and when the reception level is larger than the threshold and the amount of change in the reception level becomes positive, transmits a NAK 8!27 Output to . In this embodiment, as in the first embodiment, even higher reliability can be obtained by using the time guide punch in combination. [Effects of the Invention] As explained above, in the present invention, since the transmission block data can be transmitted when the reception conditions are good, errors in the reception block data are reduced, and highly efficient dinotal data transmission can be performed even in the upstream direction. It has the advantage of being able to
第１図は本発明の第１の実施例を説明するための概念図
、＃！ｉ２図は第１の実施例の受信側のＩＲｆ！ｔの例
を示すプａツク図、第３図は本発明の第２の実施例を説
明するための概念図、第４図はＩＦＩ２の実施例の受信
側の構或の例を示すブロック図、ｌＩ’ｌｓ図は従来の
ＡＲＱを示す概念図である．
１−１．１−２．１−３ ２．２−１．２−２
２−３ ３ ． ３−１ ． ３−２
・・・・・・送信ブロックデータ、
１’−１．１’−２．１’−３ ．２’ ２’−
１．２’−２．２’−３．３’ ，３’−１ ．３’
−２・・・・・・受信プロックデー夕、
１１．２１ ・・・・・・受信機、FIG. 1 is a conceptual diagram for explaining the first embodiment of the present invention, #! Figure i2 shows the IRf! on the receiving side of the first embodiment. FIG. 3 is a conceptual diagram for explaining the second embodiment of the present invention, and FIG. 4 is a block diagram showing an example of the structure of the receiving side of the embodiment of IFI2. , lI'ls diagram is a conceptual diagram showing conventional ARQ. 1-1.1-2.1-3 2.2-1.2-2
2-3 3. 3-1. 3-2
...Transmission block data, 1'-1.1'-2.1'-3. 2'2'-
1.2'-2.2'-3.3',3'-1.3'
-2...Reception block date evening, 11.21...Receiver,
Claims (1)
受信されたときは、受信側より送信側に対して、ＡＣＫ
によって応答し、一方、受信データに誤りが検出された
ときには、ＮＡＫによって、応答し、これを受けた送信
側が当該データの再送を行なうごとく制御される信号伝
送方式（ＡＲＱ）において、受信側に受信信号レベルを
監視する手段を設けるとともに、 受信レベルがしきい値より小であるとき、受信レベルが
該しきい値を越えるまで、ＡＣＫあるいはＮＡＫの送出
を抑止する手段と、受信レベルがしきい値より小である
か、あるいは受信レベルの変動が減少傾向であるとき、
受信レベルがしきい値を越え、受信レベルの変動が増加
傾向に転ずるまで、ＡＣＫあるいはＮＡＫの送出[Claims] When the block data transmitted from the transmitting side is correctly received by the receiving side, the receiving side sends an ACK to the transmitting side.
On the other hand, when an error is detected in the received data, the receiving side responds with a NAK and is controlled so that the sending side retransmits the data. A means for monitoring the signal level is provided, and a means for suppressing the transmission of ACK or NAK when the reception level is lower than the threshold value until the reception level exceeds the threshold value, and a means for suppressing the transmission of ACK or NAK when the reception level is lower than the threshold value. is smaller, or when the fluctuations in the received level tend to decrease,
ACK or NAK is sent until the reception level exceeds the threshold and the reception level fluctuation starts to increase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152238A JPH0319441A (en) | 1989-06-16 | 1989-06-16 | Reply timing control type arq system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152238A JPH0319441A (en) | 1989-06-16 | 1989-06-16 | Reply timing control type arq system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0319441A true JPH0319441A (en) | 1991-01-28 |
Family
ID=15536109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1152238A Pending JPH0319441A (en) | 1989-06-16 | 1989-06-16 | Reply timing control type arq system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0319441A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH088777A (en) * | 1994-06-15 | 1996-01-12 | Nec Corp | Radio data communication equipment |
| WO2000013364A1 (en) * | 1998-08-26 | 2000-03-09 | Nokia Networks Oy | Bidirectional arq apparatus and method |
| JP2008169797A (en) * | 2007-01-15 | 2008-07-24 | Kawasaki Heavy Ind Ltd | Exhaust device for engine and motorcycle |
| JP2009013960A (en) * | 2007-07-09 | 2009-01-22 | Toyota Motor Corp | Exhaust system valve |
| JPWO2014199559A1 (en) * | 2013-06-14 | 2017-02-23 | パナソニックＩｐマネジメント株式会社 | Relay device and control method of relay device |
-
1989
- 1989-06-16 JP JP1152238A patent/JPH0319441A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH088777A (en) * | 1994-06-15 | 1996-01-12 | Nec Corp | Radio data communication equipment |
| WO2000013364A1 (en) * | 1998-08-26 | 2000-03-09 | Nokia Networks Oy | Bidirectional arq apparatus and method |
| US6425105B1 (en) | 1998-08-26 | 2002-07-23 | Nokia Networks Oy | Bidirectional ARQ apparatus and method |
| JP2008169797A (en) * | 2007-01-15 | 2008-07-24 | Kawasaki Heavy Ind Ltd | Exhaust device for engine and motorcycle |
| JP2009013960A (en) * | 2007-07-09 | 2009-01-22 | Toyota Motor Corp | Exhaust system valve |
| JPWO2014199559A1 (en) * | 2013-06-14 | 2017-02-23 | パナソニックＩｐマネジメント株式会社 | Relay device and control method of relay device |
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