JPS62220049A - Variable length data transmission system - Google Patents

Variable length data transmission system

Info

Publication number
JPS62220049A
JPS62220049A JP61064353A JP6435386A JPS62220049A JP S62220049 A JPS62220049 A JP S62220049A JP 61064353 A JP61064353 A JP 61064353A JP 6435386 A JP6435386 A JP 6435386A JP S62220049 A JPS62220049 A JP S62220049A
Authority
JP
Japan
Prior art keywords
packet
transmission
code
data
control code
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
Application number
JP61064353A
Other languages
Japanese (ja)
Inventor
Eizo Arikado
有門 栄造
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP61064353A priority Critical patent/JPS62220049A/en
Publication of JPS62220049A publication Critical patent/JPS62220049A/en
Pending legal-status Critical Current

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  • Communication Control (AREA)

Abstract

PURPOSE:To judge a transmission control code detected at a data reception time as the break-point of a packet, by converting and excluding data coinciding with the transmission control code included in the packet to be transmitted, to another code. CONSTITUTION:A transmission conversion part 4 in a transmitter 1 converts a transmission packet 8 received from a transmission part 3, and transmits it to a transmission circuit 5 as a transmission line packet 9. A reception conversion part 6 in a receiver 2 converts the data in a reception line packet 10 received from the transmission circuit 5, and hands it to a reception part 7 as a reception packet 11. The transmission conversion part 4, by adding the transmission control code at the forefront, or the end of the first packet including one, at least, of the data to be transmitted, and converting the data coinciding with the code to two of the first expansion codes different from the transmission control code, and inserting the second expansion code at a position just after the data coinciding with the expansion code, converts the first packet to the second packet sectioned by the transmission control code.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は可変長データ伝送方式に関し、特に情報処理装
置間のデータ伝送に用いられる可変長データ伝送方式に
関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a variable length data transmission system, and particularly to a variable length data transmission system used for data transmission between information processing devices.

〔従来の技術〕[Conventional technology]

従来、データ伝送回線による情報処理装置間の可変長デ
ータ伝送方式では、コード独立伝送を行なう場合、パケ
ットの伝送制御コードとパケット内のこれと一致するデ
ータとを識別するために伝送制御コードの前に拡張コー
ドを付加し、かつパケット内に拡張コードと一致するデ
ータが、発生するごとに、1つの付加拡張コードをその
発生し友拡張コードの直前又は直後に付加することによ
り、パケット内に単独で伝送制御コードが存在すること
を排除していた。
Conventionally, in a variable length data transmission method between information processing devices using a data transmission line, when code-independent transmission is performed, a code is inserted before the transmission control code in order to distinguish between the transmission control code of the packet and the data that matches this within the packet. By adding an extension code to the packet, and each time data that matches the extension code occurs in the packet, one additional extension code is added immediately before or after the generated friend extension code. The existence of a transmission control code was excluded.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述しt従来の可変長データ伝送方式でに、パケットの
区切りとして伝送制御コードを用いる場合、受信装置は
、1つのパケットの開始あるいは終了を判定するため+
C1常に受信した連続する2つのデータが拡張コードと
その直後に続く伝送制御コードの二つであるかどうかを
識別しなくてはならないという欠点がある。
As mentioned above, when a transmission control code is used as a packet delimiter in the conventional variable length data transmission method, the receiving device uses +
C1 has the disadvantage that it must always identify whether the two consecutive pieces of data received are an extension code and a transmission control code immediately following it.

は異なる第一拡張コードの二つに変換し、この第ットに
変換する送信変換手段を備えて構成される。
is configured to include transmission conversion means for converting into two different first extension codes and converting into the second extension code.

〔実施例〕〔Example〕

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、本発明の一実施例の構成図である。FIG. 1 is a configuration diagram of an embodiment of the present invention.

送信装置1の送信変換部4は送信部3から受は取っ友送
信パケット8t−変換し、送信回線パケット9として伝
送回線5へ送信する。受信装置2の受信変換部6は、伝
送回線5から受信した受信回線パケット10内のデータ
を変換し、受信パケット11として受信部7へ渡す。
The transmission converter 4 of the transmitter 1 converts the friend transmission packet 8t received from the transmitter 3 and transmits it to the transmission line 5 as a transmission line packet 9. The reception conversion unit 6 of the reception device 2 converts the data in the reception line packet 10 received from the transmission line 5 and passes it to the reception unit 7 as a reception packet 11.

次に送信変換部4及び受信変換部6の動作について述べ
る。
Next, the operations of the transmission conversion section 4 and the reception conversion section 6 will be described.

伝送制御コードt−X19・20とし、伝送制御;−ド
X19・20に0以外の定数At−加算して変換した第
一拡張コードを(X十人)21・22とし、この第一拡
張コードに同様にAI加算して変換した第二拡張コード
を(X十人)+A=(X+2A)23・24とし友場合
、送信変換部4は送信部3から受は敗った送信パケット
8内のX19と一致するデータXt−矢印12で示す通
り、二つの(X十人)21に、また(X十人)21と一
致するデータ(X十人)?!−矢印13で示す通シ、(
x+A)21と(X+2A)23の二つのコードに変換
し、X19とも(X十人)21とも一致しないデータY
は、矢印14に示す通シ、変換しない。
The transmission control code is t-X19/20, and the first extension code converted by adding a constant other than 0 At to the transmission control code X19/20 is (X ten people) 21/22, and this first extension code is If the second extension code, which is similarly converted by AI addition to Data Xt that matches X19 - As shown by arrow 12, data (X ten people) that matches two (X ten people) 21 and (X ten people) 21? ! - The passage indicated by arrow 13, (
Convert to two codes: x+A)21 and (X+2A)23, and data Y that does not match either X19 or (X 10 people) 21
is not converted as indicated by arrow 14.

さらに送信パケット8の先頭と末尾とにパケットの区切
りとして伝送制御コードであるX19t−付加し、送信
回線パケット9として伝送回線5t−経由して受信装置
2へ送信する。
Furthermore, a transmission control code X19t- is added to the beginning and end of the transmission packet 8 as a packet delimiter, and the packet is transmitted as a transmission line packet 9 to the receiving device 2 via the transmission line 5t-.

受信変換部6は、受信した受信回線バケツ)10の伝送
制御コードであるX20に挾まれた範囲内の第一拡張コ
ードである(X十人)221″順次検索し、検出した場
合、そのコードは廃棄し、その直後のコード(このコー
ドは(X十人)22まtは(X+2A)24である)か
ら定数人を減算するという変換を行ない、結果、矢印1
5で示す通シ、(X十人)22t−データXに、矢印1
6で示 。
The reception conversion unit 6 sequentially searches for the first extension code (X 10 people) 221'' within the range sandwiched by the transmission control code X20 of the received reception line bucket) 10, and if detected, the code is discarded, and the conversion is performed by subtracting the constant person from the code immediately after it (this code is (X 10 people) 22 or t is (X + 2A) 24), and as a result, arrow 1
5, (X 10 people) 22t-data X, arrow 1
Shown at 6.

す通り、第二拡張コードである(X+2A)24をデー
タ(X十人)に変換し、(X十人)22と一致しないデ
ータYは変換せずに、さらに先頭と最後のX20は取り
去シ、しかる後に受信パケット11として受信部7へ渡
す。
As shown, convert the second extension code (X + 2A) 24 to data (X 10 people), do not convert data Y that does not match (X 10 people) 22, and remove the first and last X20. Thereafter, the received packet 11 is passed to the receiving unit 7.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明は、情報処理装置間のデータ
伝送に際し、伝送制御コードをパケットの区切シとして
、可変長コード独立な伝送を行なう場合に、送信すべき
パケットに含まれる伝送制御コードと一致するデータを
他のコードに変換して排除することにより、データ受信
中に検出した伝送制御コードを、他のコードを参照する
ことなしに、パケットの区切りと判断することができる
という効果があシ、本発明の可変長データ伝送方式をデ
ータ伝送に用いれば、送受信装置の構成が簡素化され、
送受信装置の負荷を軽減できる効果がある。
As explained above, when transmitting data between information processing devices, the transmission control code included in the packet to be transmitted and the transmission control code included in the packet to be transmitted, when the transmission control code is used as a packet delimiter and transmission is performed independently of the variable length code. By converting matching data into other codes and excluding them, the transmission control code detected during data reception can be determined to be a packet delimiter without referring to other codes. B. If the variable length data transmission method of the present invention is used for data transmission, the configuration of the transmitting/receiving device can be simplified.
This has the effect of reducing the load on the transmitting and receiving device.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例の構成図である。 1・・・・・・送信装置、2・・・・・・受信装置% 
3・・・・・・送信部、4・・・・・・送信変換部、5
・・・・・・伝送回線、6・・・・・・受信変換部、7
・・・・・・受信部、8・・・・・・送信パケット、9
・・・・・・送信回線パケット、10・・・・・・受信
回線パケット、11・・・・・・受信パケット、19・
20・・・・・・伝送制御コード、21・22・・・・
・・第一拡張コード、23・24・・・・・・第二拡張
コード。 代理人 弁理士  内 原   薯1、’:” ニー:
’l:くニノ′
FIG. 1 is a block diagram of an embodiment of the present invention. 1...Transmitting device, 2...Receiving device%
3...Transmission unit, 4...Transmission conversion unit, 5
...Transmission line, 6...Reception conversion section, 7
...Receiving unit, 8...Transmission packet, 9
......Transmission line packet, 10...Reception line packet, 11...Reception packet, 19.
20...Transmission control code, 21, 22...
...First extension code, 23/24... Second extension code. Agent: Patent Attorney Uchihara 薯1、':」nee:
'l: Kunino'

Claims (1)

【特許請求の範囲】[Claims] 伝送すべきデータを少くとも一つ含む第一のパケットの
先頭および末尾に伝送制御コードを付加し、この伝送制
御コードに一致する前記データを前記伝送制御コードと
は異なる第一拡張コードの二つに変換し、この第一拡張
コードに一致する前記データの直後に前記第一拡張コー
ドとも前記伝送制御コードとも異なる第二拡張コードを
挿入することにより前記第一のパケットを前記伝送制御
コードで区切られた第二のパケットに変換する送信変換
手段を備えることを特徴とする可変長データ伝送方式。
A transmission control code is added to the beginning and end of a first packet containing at least one data to be transmitted, and the data matching this transmission control code is added to two of the first extension codes different from the transmission control code. and inserting a second extension code different from both the first extension code and the transmission control code immediately after the data matching the first extension code, thereby delimiting the first packet with the transmission control code. A variable-length data transmission system characterized by comprising a transmission conversion means for converting a second packet into a second packet.
JP61064353A 1986-03-20 1986-03-20 Variable length data transmission system Pending JPS62220049A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP61064353A JPS62220049A (en) 1986-03-20 1986-03-20 Variable length data transmission system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61064353A JPS62220049A (en) 1986-03-20 1986-03-20 Variable length data transmission system

Publications (1)

Publication Number Publication Date
JPS62220049A true JPS62220049A (en) 1987-09-28

Family

ID=13255797

Family Applications (1)

Application Number Title Priority Date Filing Date
JP61064353A Pending JPS62220049A (en) 1986-03-20 1986-03-20 Variable length data transmission system

Country Status (1)

Country Link
JP (1) JPS62220049A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001010098A1 (en) * 1999-08-02 2001-02-08 Fujitsu Limited Frame communication device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001010098A1 (en) * 1999-08-02 2001-02-08 Fujitsu Limited Frame communication device
US7020163B2 (en) 1999-08-02 2006-03-28 Fujitsu Limited Frame communication system

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