JPH01180159A - Transmission control method and its equipment - Google Patents
Transmission control method and its equipmentInfo
- Publication number
- JPH01180159A JPH01180159A JP63003633A JP363388A JPH01180159A JP H01180159 A JPH01180159 A JP H01180159A JP 63003633 A JP63003633 A JP 63003633A JP 363388 A JP363388 A JP 363388A JP H01180159 A JPH01180159 A JP H01180159A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- transmission interval
- interval
- reception processing
- processing capacity
- Prior art date
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- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 195
- 238000000034 method Methods 0.000 title claims description 13
- 230000033228 biological regulation Effects 0.000 claims description 11
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 238000004891 communication Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000000872 buffer Substances 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はデータ通信分野に利用される。[Detailed description of the invention] [Industrial application field] INDUSTRIAL APPLICATION This invention is utilized in the data communications field.
本発明は、ブロック化されたデータの連続転送、誤り制
御台よびフロー制御が可能な通信手順を用いた伝送制御
方法およびその装置に関する。The present invention relates to a transmission control method and apparatus using a communication procedure capable of continuous transfer of blocked data, an error control unit, and flow control.
従来の伝送制御方法では、処理能力の異なる通信相手と
通信を行う場合に、処理能力が高い送信側から処理能力
が低い受信側にデータを連続転送すると、受信側でのデ
ータの受信が間に合わなかったり、受信用のバッファが
不足して、オーバーランが生じることがある。このとき
、受信側はフロー制御を行い、データの送信を規制する
フロー規制信号を送信側に転送し、送信側はこのフロー
規制信号を受信すると規制を解除するフロー解除信号を
受信するまでデータの送信を停止する。送信規制は第３
図に示すように、受信側での未使用の受信用バッファ数
があらかじめ定められた規制値以下になった時点で設定
され（ステップ５２１．２２）、未使用受信用バッファ
があらかじめ定められた解除値以上になった時点で解除
される（ステップ３２１．２３）。未使用受信用バッフ
ァ数の送信規制解除値は、フロー制御信号の転送回数の
増加による伝送効率の劣化を防ぐため、送信規制値より
も大きく設定される。With conventional transmission control methods, when communicating with communication partners with different processing capabilities, if data is continuously transferred from the sending end with higher processing power to the receiving end with lower processing power, the receiving end may not be able to receive the data in time. Or, there may be a shortage of reception buffers, resulting in an overrun. At this time, the receiving side performs flow control and transfers a flow restriction signal that restricts data transmission to the transmitting side, and when the sending side receives this flow restriction signal, it continues to control the data until it receives a flow release signal that releases the restriction. Stop sending. Transmission regulation is the third
As shown in the figure, it is set when the number of unused receiving buffers on the receiving side becomes less than a predetermined regulation value (step 521.22), and the unused receiving buffers are released in a predetermined manner. It is canceled when the value exceeds the value (step 321.23). The transmission restriction release value of the number of unused reception buffers is set larger than the transmission restriction value in order to prevent deterioration of transmission efficiency due to an increase in the number of transfers of flow control signals.
従って、送信規制が設定されると、解除され再び送信可
能となるまで時間を要することになり、さらに、この時
間は受信側での処理負荷に依存して時間的に変動するの
で、伝送効率が劣化する欠点があった。また、複数また
は不特定多数の通信相手と通信を行うような場合には、
送信規制が設定されてから解除されるまでの時間が通信
相手によっても異なるため、この時間が長い通信相手に
対しては伝送効率が著しく劣化する欠点があった。Therefore, once transmission restrictions are set, it takes time until they are lifted and transmission becomes possible again.Furthermore, this time fluctuates depending on the processing load on the receiving side, so transmission efficiency is reduced. It had the disadvantage of deterioration. In addition, when communicating with multiple or unspecified number of communication partners,
Since the time from when transmission restrictions are set to when they are lifted differs depending on the communication partner, there has been a drawback that transmission efficiency is significantly degraded for communication partners that take a long time.
本発明の目的は、前記の欠点を除去することにより、伝
送効率の向上を図った伝送制御方法およびその装置を提
供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a transmission control method and apparatus that improve transmission efficiency by eliminating the above-mentioned drawbacks.
本発明の伝送制御方法は、受信側からのフロー制御信号
に従いブロック化された送信データの前記受信側への送
信の制御を行う伝送制御方法において、−送信間隔内で
前記送信データの送信可能な最大観測ブロック数を定め
、前記送信データの送信量が前記最大観測ブロック数に
達する以前に規制を表す前記フロー制御信号を受信した
場合には前記送信間隔を大きくし、受信しない場合には
前記送信間隔を小さくすることを特徴とする。The transmission control method of the present invention is a transmission control method for controlling the transmission of blocked transmission data to the reception side according to a flow control signal from the reception side. A maximum number of observation blocks is determined, and if the flow control signal indicating regulation is received before the amount of transmission data reaches the maximum number of observation blocks, the transmission interval is increased, and if the flow control signal is not received, the transmission It is characterized by small intervals.
本発明の伝送制御装置は、受信側からのフロー制御信号
に従いブロック化された送信データの前記受信側への送
信の制御を行う伝送制御回路を備えた伝送制御装置にお
いて、前記フロー制御信号から前記受信側の受信処理能
力を動的に推定する受信処理能力推定手段と、推定され
た前記受信処理能力に応じて前記送信データの送信間隔
を設定する送信間隔設定手段とを備え、前記伝送制御回
路は、前記受信処理能力推定手段および前記送信間隔変
化手段の制御を行う手段を含むことを特徴とする。The transmission control device of the present invention includes a transmission control circuit that controls the transmission of blocked transmission data to the receiving side according to a flow control signal from the receiving side. The transmission control circuit comprises a reception processing capacity estimating means for dynamically estimating a reception processing capacity of a receiving side, and a transmission interval setting means for setting a transmission interval of the transmission data according to the estimated reception processing capacity. The method is characterized in that it includes means for controlling the reception processing capacity estimating means and the transmission interval changing means.
また本発明の伝送制御装置は、受信処理能力推定手段は
送信データの送信間隔を規制する送信間隔タイマと前記
送信データの送信されたブロック数をカウントする総送
信ブロック数カウンタとを含み、送信間隔設定手段は前
記送信間隔を記憶するメモリを有し前記総送信ブロック
数カウンタのカウント値と規制を表すフロー制御信号の
受信の有無とによって前記送信間隔の設定を行う送信間
隔設定回路を含むことができる。Further, in the transmission control device of the present invention, the reception processing capacity estimating means includes a transmission interval timer that regulates the transmission interval of transmission data, and a total transmission block number counter that counts the number of transmitted blocks of the transmission data, and The setting means may include a transmission interval setting circuit that has a memory for storing the transmission interval and sets the transmission interval based on the count value of the total transmission block number counter and whether or not a flow control signal representing regulation is received. can.
受信処理能力推定手段として例えば送信間隔タイマと総
送信ブロック数カウンタとを設け、送信データ間隔と総
送信ブロック数を把握し、総送信ブロック数がある定め
られた最大観測ブロック数以下でかつフロー制御信号（
フロー規制信号）が受信されていない場合に、送信間隔
設定手段として例えばメモリに記憶された送信間隔から
定数ａを差し引き、フロー規制信号が受信されている場
合には、反対に定数すを加えて再格納する。そしてこの
新たに設定された大きいまたは小さい送信間隔でもって
データの送信を行う。この場合送信間隔決定手段は、前
記送信間隔をあらかじめ定められた最小値および最大値
間の値に設定する。For example, a transmission interval timer and a total transmission block number counter are provided as reception processing capacity estimating means, and the transmission data interval and the total number of transmission blocks are grasped, and the total number of transmission blocks is equal to or less than a predetermined maximum number of observed blocks, and flow control is performed. signal(
For example, when a flow regulation signal is not received, the transmission interval setting means subtracts a constant a from the transmission interval stored in the memory, and when a flow regulation signal is received, a constant a is added to the transmission interval. Restore. Then, data is transmitted at this newly set large or small transmission interval. In this case, the transmission interval determining means sets the transmission interval to a value between a predetermined minimum value and maximum value.
・すなわち、送信規制が設定されれば送信間隔を大きく
し、設定されなければ送信間隔を小さくすることにより
、受信側の受信処理能力を推定することができ、送信間
隔はある値に収束する。- That is, by increasing the transmission interval if transmission regulation is set, and decreasing the transmission interval if it is not set, it is possible to estimate the reception processing capacity of the receiving side, and the transmission interval converges to a certain value.
従って、受信処理能力に見合ったデータの送信を行うこ
とができるので、送信規制の設定回数が減少し、伝送効
率を高めることが可能となる。Therefore, it is possible to transmit data commensurate with the reception processing capacity, so the number of times transmission restrictions are set is reduced, and transmission efficiency can be improved.
以下、本発明の実施例について図面を参照して説明する
。Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の伝送制御装置の一実施例の要部を示す
ブロック構成図である。FIG. 1 is a block diagram showing the main parts of an embodiment of a transmission control device of the present invention.
本実施例は、図外の受信側から伝送媒体４を介して入力
されるフロー制御信号８に従いブロック化された送信デ
ータ１を伝送媒体４を介して前記受信側への送信の制御
を行う伝送制御回路２を備えた伝送制御装置において、
フロー制御信号８から前記受信側の受信処理能力を動的
に推定する受信処理能力推定手段としての送信間隔タイ
マ３および総送信ブロック数カウンタ５と、推定された
前記受信処理能力に応じて送信データ１の送信間隔を設
定する送信間隔設定手段としての送信間隔設定回路６と
を備え、伝送制御回路２は、送信間隔タイマ３、総送信
ブロック数カウンタ５および送信間隔設定回路６の制御
を行う図外の手段を含んでいる。なお、７は送信間隔設
定回路内で送信間隔値を記憶するメモリである。In this embodiment, transmission is performed to control the transmission of blocked transmission data 1 to the receiving side via the transmission medium 4 in accordance with a flow control signal 8 input from a receiving side (not shown) via the transmission medium 4. In a transmission control device including a control circuit 2,
A transmission interval timer 3 and a total transmission block number counter 5 serve as reception processing capacity estimating means for dynamically estimating the reception processing capacity of the receiving side from the flow control signal 8, and transmit data according to the estimated reception processing capacity. The transmission control circuit 2 includes a transmission interval setting circuit 6 as a transmission interval setting means for setting a transmission interval of 1, and the transmission control circuit 2 controls the transmission interval timer 3, the total transmission block number counter 5, and the transmission interval setting circuit 6. Contains external means. Note that 7 is a memory that stores the transmission interval value within the transmission interval setting circuit.
本発明の伝送制御装置の特徴は、第１図において、送信
間隔タイマ３と、総送信ブロック数カウンタ４と、送信
間隔設定回路６とを設け、伝送制御回路２内にそれらの
制御回路を設けたことにある。The transmission control device of the present invention is characterized in that, as shown in FIG. That's true.
次に、本実施例の動作とともに本発明の伝送制御方法に
ついて、第２図に示す流れ図を参照して説明する。Next, the operation of this embodiment and the transmission control method of the present invention will be explained with reference to the flowchart shown in FIG.
送信データ１が伝送制御回路２に与えられると、伝送制
御回路２は送信間隔タイマ３がタイムアウトするのを待
ち（ステップ５１１）、タイムアウトすれば送信データ
１を伝送媒体４上に送信し、送信間隔タイマ３を再動作
させる。送信間隔タイマ３がすでにタイムアウトしてい
れば、伝送制御回路２はただちに送信データ１を伝送媒
体４上に送信し、送信間隔タイマ３を再動作させる。さ
らに、伝送制御回路２はデータを送信するごとに総送信
ブロック数カウンタ５に１を加える（ステップ５１２）
。総送信ブロック数カウンタ５は、あらかじめ定められ
た最大観測ブロック数に達するか、または送信規制が設
定されるごとに０に初期設定される（ステップ３１３．
３１４．５１７）。When the transmission data 1 is given to the transmission control circuit 2, the transmission control circuit 2 waits for the transmission interval timer 3 to time out (step 511), and when the transmission interval timer 3 times out, it transmits the transmission data 1 onto the transmission medium 4 and sets the transmission interval. Restart timer 3. If the transmission interval timer 3 has already timed out, the transmission control circuit 2 immediately transmits the transmission data 1 onto the transmission medium 4 and restarts the transmission interval timer 3. Furthermore, the transmission control circuit 2 adds 1 to the total transmission block counter 5 every time data is transmitted (step 512).
. The total transmission block number counter 5 is initialized to 0 each time a predetermined maximum number of observation blocks is reached or transmission regulation is set (step 313.
314.517).
送信規制の設定は伝送媒体４上から送信規制の設定を表
すフロー制御信号８（フロー規制信号）を伝送制御回路
２が受信することで行われ、送信規制が設定されると伝
送制御回路２は伝送媒体４上から送信規制の解除を表す
フロー解除信号を受信するまでデータの送信を停止する
（ステップ５２０）。The setting of transmission restriction is performed by the transmission control circuit 2 receiving a flow control signal 8 (flow restriction signal) representing the setting of transmission restriction from the transmission medium 4, and when the transmission restriction is set, the transmission control circuit 2 Data transmission is stopped until a flow release signal indicating cancellation of the transmission restriction is received from the transmission medium 4 (step 520).
総送信ブロック数カウンタ５があらかじめ定められた最
大観測ブロック数に達するまでに送信規制が設定されな
ければ、伝送制御回路２はその旨を送信間隔設定回路６
に通知し、送信間隔設定回路６はメモリ７の送信間隔か
らあらかじめ定められた値ａを引いて送信間隔を小さく
し、メモリ７に格納する（ステップ５１５）。送信規制
が設定されると、伝送制御回路２は、その旨を送信間隔
決定回路６に通知し、送信間隔設定回路６は、メモリ７
に格納されている送信間隔にあらかじめ定められた値す
を加えて送信間隔を大きくし、メモリ７に格納する（ス
テップ８１６）。ただし、送信間隔決定回路６は、送信
間隔の最大値と最小値を有しており、この範囲内で送信
間隔を決定する。If the transmission restriction is not set before the total number of transmission blocks counter 5 reaches the predetermined maximum number of observed blocks, the transmission control circuit 2 notifies the transmission interval setting circuit 6 to that effect.
The transmission interval setting circuit 6 subtracts a predetermined value a from the transmission interval in the memory 7 to reduce the transmission interval, and stores it in the memory 7 (step 515). When the transmission restriction is set, the transmission control circuit 2 notifies the transmission interval determination circuit 6 to that effect, and the transmission interval setting circuit 6 stores the memory 7
The transmission interval is increased by adding a predetermined value to the transmission interval stored in , and is stored in the memory 7 (step 816). However, the transmission interval determining circuit 6 has a maximum value and a minimum value of the transmission interval, and determines the transmission interval within this range.
伝送制御回路２は、送信間隔タイマ３の再動作時にメモ
リ７の送信間隔をタイマ値として設定する（ステップ８
１８．５１９）。送信間隔タイマ３は、伝送制御回路２
によって設定されるタイマ値を１ずつ減算し、タイマ値
が０になってタイムアウトしたときに、伝送制御回路２
にタイマ割り込みをかける。伝送制御回路２は、このタ
イマ割り込みにより送信間隔タイマ３がタイムアウトし
たことを知る。The transmission control circuit 2 sets the transmission interval in the memory 7 as a timer value when the transmission interval timer 3 restarts (step 8).
18.519). The transmission interval timer 3 is connected to the transmission control circuit 2.
The timer value set by is subtracted by 1, and when the timer value reaches 0 and times out, the transmission control circuit 2
Apply a timer interrupt to. The transmission control circuit 2 learns from this timer interrupt that the transmission interval timer 3 has timed out.
送信間隔がある一定値よりも小さくなった場合には、タ
イマ割り込みによる処理負荷が増大するため、タイマの
再動作を行わず、送信間隔を取らずに連続送信すること
もできる。If the transmission interval becomes smaller than a certain value, the processing load due to the timer interrupt increases, so it is possible to perform continuous transmission without restarting the timer and without taking a transmission interval.
以上説明したように、本発明は、送信規制が設定されれ
ば送信間隔を大きくし、設定されなければ送信間隔を小
さくすることにより、受信側の受信処理能力を推定する
ことができ、送信間隔はある値に収束する。従って、受
信処理能力に見合ったデータの送信を行うことができる
ので、送信規制の設定回数を減じることができ、伝送効
率を高める効果がある。また、送信間隔の変更を動的に
行うので、受信処理能力の時間的変動、複数または不特
定多数の通信相手との通信に対しても伝送効率を高める
ことができる効果がある。さらに、送信間隔を変更する
だけなので、受信側に新たな制約や変更は加わらない。As explained above, the present invention increases the transmission interval if transmission regulation is set, and decreases the transmission interval if it is not set, thereby making it possible to estimate the reception processing capacity of the receiving side. converges to a certain value. Therefore, it is possible to transmit data commensurate with the reception processing capacity, so the number of times transmission restrictions are set can be reduced, which has the effect of increasing transmission efficiency. Furthermore, since the transmission interval is dynamically changed, the transmission efficiency can be improved even when reception processing capacity changes over time and when communicating with multiple or unspecified number of communication partners. Furthermore, since only the transmission interval is changed, no new restrictions or changes are added to the receiving side.
第１図は本発明の伝送制御装置の一実施例の要部を示す
ブロック構成図。
第２図はその動作を示す流れ図。
第３図は従来の伝送制御方法を示す流れ図。
ｌ・・・送信データ、２・・・伝送制御回路、３・・・
送信間隔タイマ、４・・・伝送媒体、５・・・総送信ブ
ロック数カウンタ、６・・・送信間隔設定回路、７・・
・メモリ、訃・・フロー制御信号、３１１〜Ｓ２３・・
・ステップ。
特許出願人 日本電信電話株式会社
代理人 弁理士 井 出 直 孝
大廁例の真人
扇 １ 図
従来例の九丸図
７１’）３ 口FIG. 1 is a block diagram showing the main parts of an embodiment of a transmission control device of the present invention. FIG. 2 is a flowchart showing the operation. FIG. 3 is a flowchart showing a conventional transmission control method. l...Transmission data, 2...Transmission control circuit, 3...
Transmission interval timer, 4... Transmission medium, 5... Total transmission block number counter, 6... Transmission interval setting circuit, 7...
・Memory, death...Flow control signal, 311-S23...
・Step. Patent Applicant: Nippon Telegraph and Telephone Corporation Agent, Patent Attorney: Nao Ide, Masato Ougi Example: 1 Figure Conventional Nine Circle Figure 71') 3 Mouth
Claims (1)
た送信データの前記受信側への送信の制御を行う伝送制
御方法において、 一送信間隔内で前記送信データの送信可能な最大観測ブ
ロック数を定め、前記送信データの送信量が前記最大観
測ブロック数に達する以前に規制を表す前記フロー制御
信号を受信した場合には前記送信間隔を大きくし、受信
しない場合には前記送信間隔を小さくする ことを特徴とする伝送制御方法。 ２、受信側からのフロー制御信号に従いブロック化され
た送信データの前記受信側への送信の制御を行う伝送制
御回路（２）を備えた伝送制御装置において、 前記フロー制御信号から前記受信側の受信処理能力を動
的に推定する受信処理能力推定手段（３、５）と、 推定された前記受信処理能力に応じて前記送信データの
送信間隔を設定する送信間隔設定手段（６）とを備え、 前記伝送制御回路は、前記受信処理能力推定手段および
前記送信間隔変化手段の制御を行う手段を含む ことを特徴とする伝送制御方式。 ３、受信処理能力推定手段は送信データの送信間隔を規
制する送信間隔タイマ（３）と前記送信データの送信さ
れたブロック数をカウントする総送信ブロック数カウン
タ（５）とを含み、送信間隔設定手段は前記送信間隔を
記憶するメモリ（７）を有し前記総送信ブロック数カウ
ンタのカウント値と規制を表すフロー制御信号の受信の
有無とによって前記送信間隔の設定を行う送信間隔設定
回路（６）を含む請求項２記載の伝送制御装置。[Claims] 1. A transmission control method for controlling the transmission of blocked transmission data to the reception side according to a flow control signal from the reception side, wherein the transmission data can be transmitted within one transmission interval. A maximum number of observation blocks is determined, and if the flow control signal indicating regulation is received before the amount of transmission data reaches the maximum number of observation blocks, the transmission interval is increased, and if the flow control signal is not received, the transmission A transmission control method characterized by reducing the interval. 2. A transmission control device including a transmission control circuit (2) that controls transmission of blocked transmission data to the receiving side according to a flow control signal from the receiving side, Reception processing capacity estimating means (3, 5) for dynamically estimating reception processing capacity; and transmission interval setting means (6) for setting a transmission interval of the transmission data according to the estimated reception processing capacity. . A transmission control method, wherein the transmission control circuit includes means for controlling the reception processing capacity estimating means and the transmission interval changing means. 3. The reception processing capacity estimating means includes a transmission interval timer (3) that regulates the transmission interval of the transmission data, and a total transmission block number counter (5) that counts the number of transmitted blocks of the transmission data, and the transmission interval setting. The means includes a memory (7) for storing the transmission interval, and a transmission interval setting circuit (6) for setting the transmission interval based on the count value of the total transmission block number counter and whether or not a flow control signal representing regulation is received. ) The transmission control device according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63003633A JPH01180159A (en) | 1988-01-11 | 1988-01-11 | Transmission control method and its equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63003633A JPH01180159A (en) | 1988-01-11 | 1988-01-11 | Transmission control method and its equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01180159A true JPH01180159A (en) | 1989-07-18 |
Family
ID=11562892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63003633A Pending JPH01180159A (en) | 1988-01-11 | 1988-01-11 | Transmission control method and its equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01180159A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07307769A (en) * | 1994-05-16 | 1995-11-21 | Nec Corp | Inter-computer communication method |
| WO2008127591A2 (en) * | 2007-04-13 | 2008-10-23 | Schering Corporation | Pyrimidinedione derivatives and use thereof |
-
1988
- 1988-01-11 JP JP63003633A patent/JPH01180159A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07307769A (en) * | 1994-05-16 | 1995-11-21 | Nec Corp | Inter-computer communication method |
| WO2008127591A2 (en) * | 2007-04-13 | 2008-10-23 | Schering Corporation | Pyrimidinedione derivatives and use thereof |
| WO2008127591A3 (en) * | 2007-04-13 | 2009-07-23 | Schering Corp | Pyrimidinedione derivatives and use thereof |
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