JPH0486049A - Communication channel selecting system - Google Patents
Communication channel selecting systemInfo
- Publication number
- JPH0486049A JPH0486049A JP2199011A JP19901190A JPH0486049A JP H0486049 A JPH0486049 A JP H0486049A JP 2199011 A JP2199011 A JP 2199011A JP 19901190 A JP19901190 A JP 19901190A JP H0486049 A JPH0486049 A JP H0486049A
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- Prior art keywords
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- data
- communication
- time
- communication channel
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- 238000004891 communication Methods 0.000 title claims abstract description 64
- 230000005540 biological transmission Effects 0.000 claims abstract description 85
- 238000012790 confirmation Methods 0.000 claims abstract description 25
- 238000007726 management method Methods 0.000 claims description 47
- 238000012384 transportation and delivery Methods 0.000 claims description 22
- 238000004364 calculation method Methods 0.000 claims description 9
- 238000010187 selection method Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000013523 data management Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002123 temporal effect Effects 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、一連のデータを複数の通信路に分散して送受
信する際に、個々の送信データをどの通信路を用いて送
信するかを選択する通信路選択方式に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for determining which communication channel to use for transmitting each piece of data when transmitting and receiving a series of data distributed over a plurality of communication channels. Regarding the communication channel selection method to be selected.
従来の通信路選択方式においては、個々の通信路の伝送
速度とその通信路に対して一時蓄積されたデータ総量と
の比に応じて選択の根拠となる優先度を決定し、これに
より、連続する送信データの送達確認が得られるまでの
時間を、送信要求を受けた順番に可能な限り近づけるよ
うにしていた。In the conventional communication channel selection method, the priority, which is the basis for selection, is determined according to the ratio between the transmission speed of each communication channel and the total amount of data temporarily accumulated for that channel. The time it takes to receive confirmation of the transmission of data to be sent is made to be as close as possible to the order in which transmission requests are received.
しかしながら、上述した従来の方式では、通信路の信頼
性や通信する相手ｇＷのデータ処理能力の差異、あるい
はそれらの時間的な変動が考慮されていないため、例え
ば著しく品質の低い通信路があったり、相手通信装置の
能力が一定時間低下したような場合、実際には他の通信
路より通信容量が小さいにもかかわらず、その通信路の
優先度が不当に高く評価されることがあり、その結果、
各々の通信路に対する負荷の分散が適切でなく、送達確
認の得られるまでの時間が他の通信路に比べ遅くなるな
どの欠点があった。However, the conventional methods described above do not take into account the reliability of communication channels, differences in the data processing capabilities of the communicating parties, or their temporal fluctuations, so for example, there may be communication channels with extremely low quality. , If the capability of the other communication device has decreased for a certain period of time, the priority of that communication channel may be rated unreasonably high even though the communication capacity is actually smaller than other communication channels. result,
This method has disadvantages such as improper distribution of load to each communication channel, and the time it takes to receive confirmation of delivery is slower than with other communication channels.
本発明はこのような従来の欠点を改善したもので、その
目的は、どの通信路を用いてデータを送信しても送達確
認が得られるまでの時間をほぼ一定のものにすることが
できて、通信路に対する負荷分散を適切なものにするこ
とが可能な通信ｉ選択方式を提供することにある。The present invention improves these conventional drawbacks, and its purpose is to make it possible to make the time until delivery confirmation is almost constant no matter which communication path is used to send data. The object of the present invention is to provide a communication i selection method capable of appropriately distributing loads on communication channels.
本発明の通信路選択方式は、送信管理部と、少なくとも
１つの通信路のそれぞれに対応して設けられた通信路別
送受信管理部とを有し、前記送信管理部は、送信要求が
あったときに前記各通信路別送受信管理部にこれから送
信しようとするデータに対する送達確認応答時間の期待
値を算出させ、各通信路別送受信管理部からの算出結果
に基づいてどの通信路別送受信管理部に送信を依軌する
かを判断し、通信路の選択を行うようになっている。The communication channel selection method of the present invention includes a transmission management section and a communication channel-specific transmission/reception management section provided corresponding to each of at least one communication channel, and the transmission management section is configured to receive a transmission request. At times, each channel-specific transmission/reception management section calculates the expected value of the delivery confirmation response time for the data to be transmitted, and based on the calculation result from each communication channel-specific transmission/reception management section, which communication channel-specific transmission/reception management section is selected. It is designed to determine whether to rely on the transmission path and select the communication route.
送信管理部は、送信要求があったときに各通信路別送受
信管理部にこれから送信しようとするデータに対する送
達確認応答時間の期待値を算出させ、その結果に基づい
て、どの通信路別送受信管理部に送信を依軌するかを判
断して通信路の選択を行う。これにより、どの通信路を
用いてデータを送信しても送達確認が得られるまでの時
間をほぼ一定のものにすることができる。When a transmission request is received, the transmission management section causes the transmission and reception management section for each communication channel to calculate the expected value of the delivery confirmation response time for the data that is about to be transmitted, and based on the result, which transmission and reception management section for each communication channel is selected. The communication path is selected by determining whether the transmission is dependent on the other section. This makes it possible to keep the time required until delivery confirmation is obtained almost constant no matter which communication path is used to transmit data.
以下、本発明について図面を参照して説明する。 Hereinafter, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
本実施例では、送信管理部１と、受信管理部２と、少な
くとも１つの通信路別送受信管理部とが設けられており
、
第１図の例では、２つの通信路３０．４０に対応させて
２つの通信路別送受信管理部３１．４１が設けられてい
る。In this embodiment, a transmission management section 1, a reception management section 2, and at least one transmission/reception management section for each communication channel are provided, and in the example of FIG. Two channel-specific transmission/reception management sections 31 and 41 are provided.
各通信路別送受信管理部３１．４１は、通信路３０．４
０に対しデータを送受信するデータ送信手段３８．４８
およびデータ受信手段３２．４２と、
送信すべきデータを一時蓄積する送信待ちデータ行列３
３．４３と、
データの送達確認に要した時間を検出する経過時間管理
手段３４．４４と、
一定時間以上送達確認が取れない場合に、再度同じデー
タを送り直す再送手段３７．４７と、データの送達確認
に要した時間および回線障害に関する情報を保持する回
線状態保持手段３５゜４５と、
ある長さのデータを送信する場合にデータの送達確認が
得られるまでに要する時間の期待値を計算する応答時間
算出手段３６．４６とを有している。The transmission/reception management unit 31.41 for each communication channel has the communication channel 30.4.
38.48 Data transmitting means for transmitting and receiving data to and from 0
and data receiving means 32, 42, and a transmission queue 3 for temporarily storing data to be transmitted.
3.43, an elapsed time management means 34.44 for detecting the time required to confirm data delivery, and a retransmission means 37.47 for resending the same data if delivery confirmation cannot be obtained for a certain period of time; A line status holding means 35, 45 that maintains information regarding the time required for delivery confirmation and line failure, and calculates the expected value of the time required to obtain data delivery confirmation when transmitting a certain length of data. response time calculation means 36 and 46.
また、送信管理部１は、送信データを受は付け、１つの
通信路別送受信管理部３１または４１にそのデータを引
き渡す送信データ受付手段１１と、受は付けた送信デー
タをどの通信路別送受信管理部に引き渡すかを選択する
通信路別送受信管理部選択手段１２とを有し、受信管理
部２は、受信データ順序制御手段２１を有している。The transmission management section 1 also includes a transmission data reception means 11 that accepts transmission data and hands over the data to one channel-specific transmission/reception management section 31 or 41, and a transmission data receiving section 11 that accepts transmission data and hands over the data to one channel-specific transmission/reception management section 31 or 41. The reception management section 2 has a transmission/reception management section selection means 12 for each communication channel which selects whether to hand over the received data to the management section, and the reception management section 2 has a reception data order control means 21.
次にこのような構成における通信路選択処理動作につい
て説明する。Next, the communication path selection processing operation in such a configuration will be explained.
なお以下では、送信データ受付手段１１が送信を依願さ
れた一連のデータを２本の通信路３０゜４０に分散して
送信し、逆に通信相手から２本の通信路３０．４０に分
散して送られてきたデータを、最終的に受信データ順序
制御手段２工で相手が送信した順序に再構成する場合に
ついて説明する。In the following, the transmission data receiving means 11 distributes and transmits a series of data requested to be transmitted over two communication paths 30. A case will be described in which the received data order control means 2 finally reconfigures the data sent by the receiver in the order in which it was sent by the other party.
送信管理部１は、通信システムの利用者からのデータ送
信要求を受は付け、それを適当な通信路別送受信管理部
３１．４１のいずれかに引き渡して通信相手に送信する
ための管理を行う。このために、送信データ受付手段１
１は、先づ、利用者からの送信要求を受は付けると、通
信路別送受信管理部選択手段１２を呼び出し、いずれの
通信路別送受信管理部３１．４１に送信を依願したほう
が送達確認応答が早く得られるかを判断して、その通信
路別送受信管理部に送信を依願する。The transmission management section 1 accepts data transmission requests from users of the communication system, hands them over to one of the appropriate transmission/reception management sections 31 and 41 for each communication channel, and performs management for transmitting them to the communication partner. . For this purpose, the transmission data reception means 1
1 first receives a transmission request from a user, calls the channel-specific transmission/reception management section selection means 12, and sends a delivery confirmation response to whichever channel-specific transmission/reception management section 31 or 41 is requested to transmit. A request is made to the transmission/reception management unit for each channel to transmit the information.
通信路別送受信管理部選択手段１２は、各通信路別送受
信管理部３１．４１の応答時間算出手段３６．４６を順
に呼び出し、これから送信しようとしているデータに対
する送達確認応答時間の期特価を得る。その結果、期待
値の小さいほうに送信を依頼すべきとして送信データ受
付手段１１に報告する。このとき、応答時間算出手段３
６．４６は、期待値として無限大を報告することがあり
、すべての応答時間算出手段３６．４６が無限大を報告
した場合には、送信ビジー状態としてその該当送信デー
タの送信保留を送信データ受付手段１１に指示する。送
信データ受付手段１１は、送信保留を指示された状態中
は、利用者からの送信要求を受は付けない。The channel-specific transmission/reception management unit selection unit 12 sequentially calls the response time calculation unit 36.46 of each channel-specific transmission/reception management unit 31.41 to obtain a special price for the delivery confirmation response time for the data to be transmitted. As a result, it is reported to the transmission data reception means 11 that the transmission should be requested to the one with the smaller expected value. At this time, response time calculation means 3
6.46 may report infinity as the expected value, and if all response time calculation means 36.46 report infinity, the transmission of the corresponding transmission data is set as a transmission busy state. Instruct the reception means 11. The transmission data accepting means 11 does not accept transmission requests from the user while it is instructed to suspend transmission.
送信要求を受けた通信路別送受信管理部３１．４１は、
送信データを送信待ち行列３３．４３に一旦蓄積すると
同時に、そのときの時刻・データサイズを後にそのデー
タであることを特定するための情報（ＩＤ）とともに経
過時間管理手段３４゜４４に引き渡す。The channel-specific transmission/reception management unit 31.41 that received the transmission request,
Once the transmission data is stored in the transmission queue 33.43, the time and data size at that time are passed to the elapsed time management means 34.44 along with information (ID) for later identifying the data.
経過時間管理手段３４．４４は、予め設定する一定時間
内に送達確認が得られるかどうか監視する。確認が得ら
れなかった場合、経過時間管理手段３４．４４は再送手
段３７．４７に確認が得られなかったフレームの再送を
指示する。同一フレームに関する連続再送は予め設定す
る一定回数を上限とし、それを経過した場合、回線状態
保持手段３５．４５に回線障害状態を記憶する。これ以
鋒、応答時間算出手段３６．４６は、常に無限大時間を
報告するようになる。The elapsed time management means 34.44 monitors whether delivery confirmation is obtained within a predetermined period of time. If confirmation is not obtained, the elapsed time management means 34.44 instructs the retransmission means 37.47 to retransmit the frame for which confirmation was not obtained. Continuous retransmission of the same frame is limited to a predetermined number of times, and when this limit is exceeded, the line failure status is stored in the line status holding means 35, 45. From this point on, the response time calculation means 36.46 will always report an infinite time.
データ送信手段３８．４８は、送信待ち行列３３゜４３
にデータが蓄積されており、かつ送達確認待ちフレーム
数等の状態が許せば、データを通信路上へ送信する。デ
ータ送信を行う場合、送信待ち行列３３．４３を走査し
、次に送信すべきデータが存在すればその旨を経過時間
管理手段３４．４４に通知する。The data transmitting means 38.48 has a transmission queue 33.43.
If data has been accumulated in , and conditions such as the number of frames waiting for delivery confirmation permit, the data is transmitted onto the communication path. When transmitting data, the transmission queue 33.43 is scanned, and if there is data to be transmitted next, this is notified to the elapsed time management means 34.44.
データ受信手段３２．４２は、通信路３０．４０から受
信したデータを解析し、送達確認に関する情報が含まれ
ていればそれをデータ送信手段３８゜４８および経過時
間管理手段３４．４４に通知する。データ送信手段３８
．４８は必要ならばこの通知を契期としてデータ送信を
実行する。また、受信したのが利用者データであれば、
それを受信データ順序制御手段２１に引き渡す。The data receiving means 32.42 analyzes the data received from the communication path 30.40, and if information regarding delivery confirmation is included, notifies the data transmitting means 38.48 and the elapsed time managing means 34.44. . Data transmission means 38
．． 48 executes data transmission using this notification as a trigger, if necessary. Also, if what is received is user data,
It is delivered to the received data order control means 21.
経過時間管理手段３４．４４は、送信依頼を受けたとき
に記録した時刻と送達ｉ認情報受信時の時刻とから、送
信依願時から送達確認時までの経過時間を算出する。た
だし、その送達確認が、上述したような次に送信すべき
データが存在する状態で送信されたフレームに対応する
ものであった場合、経過時間を算出は行わず、送達確認
受信時刻の情報は廃棄する。すなわち、連続データ送信
時の経過時間は、その先頭から最後のフレームの送達確
認が取れるまでの間として計測する。The elapsed time management means 34.44 calculates the elapsed time from the time of the transmission request to the time of delivery confirmation based on the time recorded when the transmission request was received and the time when the delivery i-acknowledgement information was received. However, if the delivery confirmation corresponds to a frame that was sent while there is data to be sent next, as described above, the elapsed time is not calculated and the information on the delivery confirmation reception time is Discard. That is, the elapsed time during continuous data transmission is measured as the time from the beginning until delivery confirmation of the last frame is obtained.
経過時間を算出したら、経過時間管理手段３４゜４４は
、経過時間からデータが実際に回線上を流れている時間
を減算した損失時間を計算する。算出した損失時間は、
一定の手順に基づいて回線状態保持手段３５．４５に反
映させ、その結果を記録しておく。After calculating the elapsed time, the elapsed time management means 34, 44 calculates the loss time by subtracting the time during which data is actually flowing on the line from the elapsed time. The calculated loss time is
The line status is reflected in the line status holding means 35, 45 based on a certain procedure, and the results are recorded.
応答時間算出手段３６．４６は、通信路別送受信管理部
選択手段１２から要求されたとき、もしくは送信待ち行
列３３．４３がデータ受は入れ不可から可の状態に変化
したときに、送信待ち行列３３．４３中のデータと、こ
れから送信を要求しようとしているデータのサイズの合
計と、回線状態保持手段３５．４５に記憶されている損
失時間とから、該当通信路を用いてデータを送信した場
合の送達確認を得られるまでの時間の期待値を算出し、
通信路別送受信管理部選択手段１２に通知する。The response time calculation means 36.46 calculates the amount of data in the transmission queue when requested by the channel-based transmission/reception management section selection means 12, or when the transmission queue 33.43 changes from not being able to accept data to being able to accept data. 33. If data is transmitted using the corresponding communication channel based on the total size of the data in 43, the data that is about to be requested to be transmitted, and the loss time stored in the line status holding means 35.45. Calculate the expected time it will take to receive confirmation of delivery.
Notification is made to the channel-based transmission/reception management section selection means 12.
受信データ順序制御手段２１は、複数の通信路に分散し
て送られてきたために、通信相手の利用者が送信したの
と異なる順序で受信したデータを正しい順序に並べ変え
て目側利用者に引き渡す。The received data order control means 21 rearranges the data received in a different order than that transmitted by the communication partner user into the correct order because the data was distributed and sent over multiple communication channels, and then sends the data to the eye user. hand over.
上述の実施例では、通信路が２本の場合について説明し
たが、通信路が３本以上の場合にも同様の処理が行われ
る。In the above-described embodiment, the case where there are two communication paths has been described, but the same processing is performed when there are three or more communication paths.
以上に説明したように本発明は、実際の通信路の応答時
間に基づいて通信路選択の根拠を算出するようにしてい
るので、どの通信路を用いてデータを送信しても送達確
認が得られるまでの時間がほぼ一定となり、通信路に対
する負荷分散能力を向上させることができるという効果
がある。As explained above, the present invention calculates the basis for selecting a communication channel based on the response time of the actual communication channel, so no matter which channel is used to send data, delivery confirmation is obtained. This has the effect of making it possible to improve the load distribution ability for the communication path because the time it takes for the communication path to pass is almost constant.
第１図は本発明の一実施例のブロック図である。
第１図において、
１・・・送信データ管理部、１１・・・送信データ受付
手段、１２・・・通信路別送受信管理部選択手段、２・
・・受信データ管理部、２１・・・受信データ順序制御
手段、３１．４１・・・通信路別送受信管理部、３０．
４０・・・通信路、３８．４８・・・データ送信手段、
３２．４２・・・データ受信手段、３３．４３・・・送
信待ち行列、３４．４４・・・経過時間管理手段、３５
．４５・・・回線状態保持手段、３６．４６・・・応答
時間算出手段、３７．４７・・・再送手段。FIG. 1 is a block diagram of one embodiment of the present invention. In FIG. 1, 1... Transmission data management section, 11... Transmission data reception means, 12. Transmission/reception management section selection means for each communication channel, 2.
. . . Received data management unit, 21 . . . Received data order control means, 31. 41 .
40... Communication channel, 38.48... Data transmission means,
32.42...Data receiving means, 33.43...Transmission queue, 34.44...Elapsed time management means, 35
．． 45... Line status holding means, 36.46... Response time calculation means, 37.47... Retransmission means.
Claims (1)
応して設けられた通信路別送受信管理部とを有し、前記
送信管理部は、送信要求があったときに前記各通信路別
送受信管理部にこれから送信しようとするデータに対す
る送達確認応答時間の期待値を算出させ、各通信路別送
受信管理部からの算出結果に基づいてどの通信路別送受
信管理部に送信を依頼するかを判断し、通信路の選択を
行うようになっていることを特徴とする通信路選択方式
。It has a transmission management section and a communication channel-specific transmission and reception management section provided corresponding to each of at least one communication channel, and the transmission management section manages the transmission and reception management for each communication channel when a transmission request is received. calculate the expected value of the delivery confirmation response time for the data that is about to be sent, and determine which channel-specific transmission/reception management section to request transmission to based on the calculation results from each channel-specific transmission/reception management section. , a communication path selection method characterized in that a communication path is selected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2199011A JPH0486049A (en) | 1990-07-30 | 1990-07-30 | Communication channel selecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2199011A JPH0486049A (en) | 1990-07-30 | 1990-07-30 | Communication channel selecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0486049A true JPH0486049A (en) | 1992-03-18 |
Family
ID=16400628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2199011A Pending JPH0486049A (en) | 1990-07-30 | 1990-07-30 | Communication channel selecting system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0486049A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7698418B2 (en) | 2005-03-29 | 2010-04-13 | Fujitsu Limited | Monitoring system |
-
1990
- 1990-07-30 JP JP2199011A patent/JPH0486049A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7698418B2 (en) | 2005-03-29 | 2010-04-13 | Fujitsu Limited | Monitoring system |
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