JPH04930A - Frame multiple transmission system - Google Patents
Frame multiple transmission systemInfo
- Publication number
- JPH04930A JPH04930A JP2102259A JP10225990A JPH04930A JP H04930 A JPH04930 A JP H04930A JP 2102259 A JP2102259 A JP 2102259A JP 10225990 A JP10225990 A JP 10225990A JP H04930 A JPH04930 A JP H04930A
- Authority
- JP
- Japan
- Prior art keywords
- frame
- transmission
- general
- priority
- transmitted
- 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.)
- Pending
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 69
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Landscapes
- Time-Division Multiplex Systems (AREA)
- Communication Control (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はフレーム多重伝送方式に関し、特に）（ＤＬＣ
手順フレーム形式を基本としたフレーム伝送方式におけ
る優先度の高い即時性フレームを優先伝送するフレーム
多重伝送方式に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a frame multiplex transmission system, particularly) (DLC).
The present invention relates to a frame multiplex transmission system that preferentially transmits immediacy frames with high priority in a frame transmission system based on a procedural frame format.
従来、この種のフレーム多重伝送方式は、一般フレーム
送信中に該一般フレームより優先度の高い優先フレーム
の伝送要求が発生した時、送信中の一般フレームの送信
終了を待って優先フレームを送信する第１の方式と、送
信中の一般フレームの送信を一時打ち切った後優先フレ
ームを送信し、この優先フレームの送信終了後送信を打
ち切った一般フレームを最初から再送信する第２の方式
とがあった。Conventionally, in this type of frame multiplex transmission system, when a transmission request for a priority frame with a higher priority than the general frame occurs during transmission of a general frame, the priority frame is transmitted after waiting for the transmission of the general frame currently being transmitted to be completed. There are two methods: the first method and the second method, which transmits a priority frame after temporarily aborting the transmission of the general frame that is currently being transmitted, and then retransmits the general frame whose transmission was aborted from the beginning after the transmission of this priority frame is completed. Ta.
上述した従来のフレーム多重伝送方式における第１の方
式では、送信中のフレーム長が長い場合や伝送速度が遅
い回線を使用している場合には、優先フレームの送信が
待たされるため、伝送遅延時間が長くなるという欠点が
あった。また第２の方式では、優先フレームの送信終了
後送信を中断したフレームをあらためて最初から再送信
するため、再送信による伝送効率の低下をまねくという
欠点があった。In the first method of the conventional frame multiplex transmission method described above, when the length of the frame being transmitted is long or when a line with a slow transmission speed is used, the transmission of the priority frame has to wait, so the transmission delay time The disadvantage was that it was long. Furthermore, in the second method, after the transmission of the priority frame is completed, the frame whose transmission was interrupted is retransmitted from the beginning, so there is a drawback that the retransmission causes a reduction in transmission efficiency.
本発明の目的は、優先度の高い優先フレームの伝送要求
が発生した時、送信中の一般フレーム送信を一時中断し
、優先フレームの送信終了後−時中断した一般フレーム
の中断時点から送信を開始するフレーム多重伝送方式を
提供することにある。An object of the present invention is to temporarily interrupt the transmission of a general frame that is currently being transmitted when a transmission request for a priority frame with a high priority occurs, and to start transmission from the point at which the interrupted general frame is interrupted after the transmission of the priority frame is completed. The purpose of the present invention is to provide a frame multiplex transmission system for transmitting frames.
本発明のフレーム多重伝送方式は、ＨＤＬＣ手順のパケ
ットフレーム形式を基本として用いたフレーム多重伝送
方式において、一般フレーム送信中に該一般フレームよ
り優先度の高い優先フレームの伝送要求が発生した時、
前記ＨＤＬＣ手順の終了フラグと該終了フラグに続く特
殊ビットパターンで構成されたフレーム送信中断コマン
ドを送信して送信中の前記一般フレーム送信を一時中断
し前記優先フレームを送信し、該優先フレームの送信終
了後前記送信中断した一般フレームの送信を再開するよ
う構成されている。The frame multiplex transmission system of the present invention is a frame multiplex transmission system that uses the packet frame format of the HDLC procedure as a basis, and when a request for transmission of a priority frame with a higher priority than the general frame occurs during transmission of a general frame,
Transmitting a frame transmission interruption command consisting of an end flag of the HDLC procedure and a special bit pattern following the end flag, temporarily suspending the general frame transmission in progress and transmitting the priority frame; and transmitting the priority frame. After the transmission is finished, the transmission of the general frame whose transmission was interrupted is resumed.
次に本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図は本発明の一実施例を示すフレーム送信シーケン
スを示す図である。FIG. 1 is a diagram showing a frame transmission sequence showing an embodiment of the present invention.
第１図は、一般フレーム送信中に優先フレーム送信要求
が発生し、一般フレームの送信を一時中断して優先フレ
ームを送信し、その後一般フレームの送信を再開した場
合の送信シーケンスを示している。FIG. 1 shows a transmission sequence when a priority frame transmission request occurs during general frame transmission, the transmission of the general frame is temporarily interrupted, the priority frame is transmitted, and then the transmission of the general frame is resumed.
ＨＤＬＣ手順により一般フレームの先頭フラグ１、アド
レスフィールド２．制御フィールド３゜データ４−１を
送信中に、該一般フレームより優先度の高い優先フレー
ムの送信要求が発生すると、送信側では直ちにＨＤＬＣ
手順の終了フラグ７と、終了フラグ７に引続き一般フレ
ームの送信中断を示す中断コマンド８を連続して送信す
ることにより、一般フレームのデータ４−１の送信を中
断する。The head flag 1, address field 2. Control field 3゜If a request to send a priority frame with a higher priority than the general frame occurs while data 4-1 is being transmitted, the sending side immediately transmits the HDLC
Transmission of the general frame data 4-1 is interrupted by successively transmitting a procedure end flag 7 and an interruption command 8 indicating interruption of general frame transmission following the end flag 7.
一般フレームの送信が中断すると、一般フレームのデー
タ４−１に引続き、優先フレームの先頭フラグ１１．ア
ドレスフィールド１２．制御フィールド１３．データ１
４．フレームチエツクシーケンス１５１．終了フラグ１
６の順に通常のＨＤＬＣフレーム形式で送信して、優先
フレームの送信を終了する。優先フレームの送信が終了
すると、先に送信途中で一時中止した一般フレームの残
りのデータ４−２から送信を開始し、データ４−２に続
くフレームチエツクシーケス５．終了フラグ６を送信し
、一般フレームの送信を完了する。When the transmission of the general frame is interrupted, following the general frame data 4-1, the priority frame head flag 11. Address field 12. Control field 13. data 1
4. Frame check sequence 151. End flag 1
6 in the normal HDLC frame format, and the priority frame transmission ends. When the transmission of the priority frame is completed, transmission starts from the remaining data 4-2 of the general frame that was temporarily stopped during transmission, and the frame check sequence 5. The end flag 6 is transmitted, and the transmission of the general frame is completed.
受信側においては、一般フレーム受信中に終了フラグ７
と中断コマンド８を連続して受信すると、一般フレーム
の受信を中断し、そのあとに続き送信されてくる優先フ
レームの受信後、一般フレームの受信を再開する。On the receiving side, the end flag 7 is set while receiving a general frame.
When the interrupt command 8 and interrupt command 8 are received in succession, reception of the general frame is interrupted, and reception of the general frame is resumed after receiving the priority frame that is subsequently transmitted.
以上説明したように本発明は、優先フレームの送信の際
、送信中の一般フレームの送信を一時中断し、優先フレ
ームを送信でき且優先フレーム送信終了後、一般フレー
ムの中断した所から引き続き送信を再開できるため、即
時に優先フレームを送信でき且、伝送効率の低下を回避
できるという効果がある。As explained above, when transmitting a priority frame, the present invention can temporarily interrupt the transmission of the general frame being transmitted and transmit the priority frame, and after the transmission of the priority frame is finished, the transmission of the general frame can be continued from the point where the transmission of the general frame was interrupted. Since it can be restarted, priority frames can be transmitted immediately and a decrease in transmission efficiency can be avoided.
第１図は本発明の一実施例を示すフレーム送信シーケン
スを示す図である。
１．１１・・・先頭フラグ、２，１２・・・アドレスフ
ィールド、３，１３・・・制御フィールド、４−１゜４
−２．１４・・・データ、５．１５・・・フレームチエ
ツクシーケンス、６，７・・・終了フラグ、８・・・中
断コマド。FIG. 1 is a diagram showing a frame transmission sequence showing an embodiment of the present invention. 1.11...Start flag, 2,12...Address field, 3,13...Control field, 4-1゜4
-2.14...Data, 5.15...Frame check sequence, 6,7...End flag, 8...Interruption command.
Claims (1)
たフレーム多重伝送方式において、一般フレーム送信中
に該一般フレームより優先度の高い優先フレームの伝送
要求が発生した時、前記ＨＤＬＣ手順の終了フラグと該
終了フラグに続く特殊ビットパターンで構成されたフレ
ーム送信中断コマンドを送信して送信中の前記一般フレ
ーム送信を一時中断し前記優先フレームを送信し、該優
先フレームの送信終了後前記送信中断した一般フレーム
の送信を再開することを特徴とするフレーム多重伝送方
式。In a frame multiplex transmission system that uses the packet frame format of the HDLC procedure as a basis, when a transmission request for a priority frame with a higher priority than the general frame occurs during the transmission of a general frame, the end flag of the HDLC procedure and the end flag are transmitted. A frame transmission interruption command consisting of a special bit pattern following is sent, temporarily interrupting the general frame transmission in progress and transmitting the priority frame, and after the transmission of the priority frame is completed, the transmission of the general frame whose transmission was interrupted is transmitted. A frame multiplex transmission method characterized by restarting the frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2102259A JPH04930A (en) | 1990-04-18 | 1990-04-18 | Frame multiple transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2102259A JPH04930A (en) | 1990-04-18 | 1990-04-18 | Frame multiple transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04930A true JPH04930A (en) | 1992-01-06 |
Family
ID=14322597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2102259A Pending JPH04930A (en) | 1990-04-18 | 1990-04-18 | Frame multiple transmission system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04930A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006279188A (en) * | 2005-03-28 | 2006-10-12 | Nec Corp | Transmission controller conducting priority control, communication controller, communication system, communication network and transmission method |
| JP2009194719A (en) * | 2008-02-15 | 2009-08-27 | Nec Electronics Corp | Data communication device and method for determining transmission candidate message |
-
1990
- 1990-04-18 JP JP2102259A patent/JPH04930A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006279188A (en) * | 2005-03-28 | 2006-10-12 | Nec Corp | Transmission controller conducting priority control, communication controller, communication system, communication network and transmission method |
| JP2009194719A (en) * | 2008-02-15 | 2009-08-27 | Nec Electronics Corp | Data communication device and method for determining transmission candidate message |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2000513552A (en) | Continuous user data transmission method in reverse common channel of mobile communication system | |
| JPH04930A (en) | Frame multiple transmission system | |
| JPS622747A (en) | Reception control system | |
| JPH05145594A (en) | Real time communication equipment | |
| JPH052026B2 (en) | ||
| JP2000078187A (en) | Device and method for communicating data and storage medium | |
| JPH02170644A (en) | Priority transmitting method for multimedia communication system | |
| JPS6351623B2 (en) | ||
| JP4218152B2 (en) | Communication method and communication system | |
| JPS5934746A (en) | Data communication controlling system | |
| JPS62216548A (en) | Data transfer system | |
| JPH10207653A (en) | Interface device | |
| JP2634631B2 (en) | Transmission control method | |
| JPH05276217A (en) | Communication controller | |
| JP2576270B2 (en) | Image communication control method | |
| JP4097064B2 (en) | Program download method and system | |
| JPS61167248A (en) | Data communication | |
| JP2003203267A (en) | Setting method of transmission speed between master and slave in vending machine | |
| JP2004140447A (en) | Communication system and communication method | |
| JPS6021650A (en) | Data transmission system | |
| JPS62242438A (en) | Data communication equipment | |
| JPH04238432A (en) | Data transmission system | |
| JPH08223144A (en) | Method and system for automatically setting the number of queuing frames in automatic retransmission control protocol | |
| JPH0319545A (en) | Packet transmission system | |
| JP2002051107A (en) | Method of switching apparatus, communication control unit, and communication system |