JPH03101334A - Data transmission system in packet switching network - Google Patents

Data transmission system in packet switching network

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Publication number
JPH03101334A
JPH03101334A JP23750289A JP23750289A JPH03101334A JP H03101334 A JPH03101334 A JP H03101334A JP 23750289 A JP23750289 A JP 23750289A JP 23750289 A JP23750289 A JP 23750289A JP H03101334 A JPH03101334 A JP H03101334A
Authority
JP
Japan
Prior art keywords
packet
data
terminal
packet transmission
data packet
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
JP23750289A
Other languages
Japanese (ja)
Inventor
Hidehiro Matsuo
松尾 英普
Mitsuo Imai
光雄 今井
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.)
Hitachi Cable Ltd
Original Assignee
Hitachi Cable Ltd
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 Hitachi Cable Ltd filed Critical Hitachi Cable Ltd
Priority to JP23750289A priority Critical patent/JPH03101334A/en
Publication of JPH03101334A publication Critical patent/JPH03101334A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To shorten the delay time in a network by synthesizing plural data packets different in destinations from plural terminals in packet transmission equipments to which the terminals belong and informing all the packet transmission equipments in the network by means of multiple address communication. CONSTITUTION:When a terminal 11 transmits a data packet 7 to a terminal 32 and a terminal 12 transmits a data packet 8 to a terminal 21, a packet transmission equipment 1 synthesizes the data packets 7 and 8 and assembles a new data packet 9 for which a destination address 91 showing multiple address and control information 92 are added. All the packet transmission equipment 1-4 receive it by multiple address communication. Respective packet transmission equipments 1-4 resolve the received packet into the original data packets 7 and 8 and the packet transmission equipment 2 takes out the data packet 8 and transfers it to the terminal 21. The packet transmission equipment 3 takes out the data packet 7 and transfers it to the terminal 32. Thus, the data packets from plural terminals can be simultaneously transmitted to a transmission line by one token acquisition.

Description

【発明の詳細な説明】 [産業上の利用分野コ この発明は、複数の端末を接続したパケット伝送装置を
伝送路で接続したパケット交換網において、同じパケッ
ト伝送装置に属する複数端末から宛先の異なる複数のデ
ータパケットが同時に発生した場合のデータ伝送方式に
関するものである。
[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a packet switching network in which packet transmission devices connected to a plurality of terminals are connected via a transmission path. This relates to a data transmission method when multiple data packets occur simultaneously.

[従来の技術1 第1図に、2台の端末を接続可能なパケット伝送装置を
含むループ状ネットワークを示す。図において、1,2
,3.4はパケット伝送装置、11.12,21.22
,31,32,41゜Xl 2はパソコン等の端末、5
はループ伝送路、6はトークン、7.8はデータパケッ
トである。
[Prior Art 1] Fig. 1 shows a loop network including a packet transmission device to which two terminals can be connected. In the figure, 1, 2
, 3.4 is a packet transmission device, 11.12, 21.22
, 31, 32, 41°Xl 2 is a terminal such as a computer, 5
is a loop transmission path, 6 is a token, and 7.8 is a data packet.

端末11がデータパケットを端末32へ送る場合、第2
図(1)に示すように、情報部に宛先として端末32の
アドレスを付加したバゲノト7を、パケット伝送装置1
へ送る。ループ伝送路5には、特殊な制御パケットであ
るトークン6が巡回しており、これを捕捉しなパケット
伝送装置のみが、データパケットをループ伝送路5に送
り出すことができる。
When terminal 11 sends a data packet to terminal 32, the second
As shown in FIG.
send to A token 6, which is a special control packet, circulates on the loop transmission path 5, and only a packet transmission device that does not capture this can send a data packet to the loop transmission path 5.

パケット伝送装置1は、トークン6を捕まえると、デー
タパケット7をループ伝送路5に送り出す、パケット伝
送装置1,2,3.4は、常にループ伝送路5上を巡る
パケットを監視しており、自分に接続された端末宛ての
データパケットをコピーし、データパケットは更にルー
プ伝送1i’85を巡回させる。
When the packet transmission device 1 captures the token 6, it sends the data packet 7 to the loop transmission path 5. The packet transmission devices 1, 2, and 3.4 constantly monitor the packets circulating on the loop transmission path 5. The data packet addressed to the terminal connected to itself is copied, and the data packet is further circulated through the loop transmission 1i'85.

今、パケット伝送装置1が端末32宛てのデータパケッ
ト7をループ伝送路5に送出すると、パケット伝送装置
3はそのデータパケット7をコピーし、端末32へ送る
。一方、ループ伝送路5上を巡るデータパケットは再び
パケット伝送装置1へ戻り、パゲッI・伝送装置1はデ
ータパケット7をループ伝送路5から取り除く。そして
、再びトークン6がループ伝送路5上を巡回するように
送り出す。
Now, when the packet transmission device 1 sends a data packet 7 addressed to the terminal 32 to the loop transmission path 5, the packet transmission device 3 copies the data packet 7 and sends it to the terminal 32. On the other hand, the data packet circulating on the loop transmission path 5 returns to the packet transmission device 1 again, and the page I/transmission device 1 removes the data packet 7 from the loop transmission path 5. Then, the token 6 is sent out again so as to circulate on the loop transmission line 5.

[発明が解決しようとする課題] 従来の伝送方式は、以上のようにトークンを捕まえたパ
ケット伝送装置は1個のデータパケットをループ伝走路
に送り終わると、次のパケット伝送装置にトークンを渡
さなければならない、このため、パケット伝送装置に接
続された複数の端末から同時にデータパケットの送信要
求が発生した場合、トークンを捕まえてもどれか1つの
端末からのデータパケットしかループ伝送路に送出でき
ず、他の端末からのデータパケットは再度1−一クンを
捕まえなければループ伝送路に送出できないという欠点
があった。
[Problems to be Solved by the Invention] In the conventional transmission method, as described above, when the packet transmission device that has captured the token finishes sending one data packet to the loop transmission path, it passes the token to the next packet transmission device. Therefore, if data packet transmission requests occur simultaneously from multiple terminals connected to a packet transmission device, only one data packet from one terminal can be sent to the loop transmission path even if the token is captured. However, there was a drawback that data packets from other terminals could not be sent to the loop transmission line unless the 1-1 packet was captured again.

この発明は、上記のような従来の従来方式に鑑みてなさ
れたものであり、1回のトークン捕捉により複数端末か
らのデータパケットを、−度に伝送路に送出できる伝送
方式を提供することを目的としている。
This invention has been made in view of the conventional conventional methods as described above, and aims to provide a transmission method that can send data packets from multiple terminals to a transmission path at once by capturing a token once. The purpose is

[課題を解決するための手段] 本発明のパケット交換網におけるデータ伝送方式は、複
数端末を接続したパケット伝送装置を伝送路で接続した
パケット交換網において、同じパケット伝送装置に属す
る複数端末からの宛先のTなる複数のデータパケットを
それら端末の属するパケット伝送装置で合成し、その合
成データパケットを同報通信によって網内の全パケット
伝送装置に知らしめ、各パケット伝送装置が受信した上
記合成データパケットを分解し、自己のパケット伝送装
置に接続された端末宛のデータパケットを取り出すもの
である。
[Means for Solving the Problems] The data transmission method in a packet switching network of the present invention is such that, in a packet switching network in which packet transmission devices connected to a plurality of terminals are connected by a transmission path, data transmission from a plurality of terminals belonging to the same packet transmission device is performed. A plurality of data packets with destinations T are combined by the packet transmission equipment to which these terminals belong, and the combined data packet is made known to all the packet transmission equipment in the network by broadcast communication, and the combined data received by each packet transmission equipment is It disassembles packets and extracts data packets destined for terminals connected to its own packet transmission device.

[作用] あるパケット伝送装置に属する複数端末から、宛先の異
なる複数のデータパケットが出された場合、そのパケッ
ト伝送装置はこれを合成して新たな合成データパケット
とし、これを同報通信によって網内の全パケット伝送装
置に知らしめる。これは、1回のトークン捕捉により、
複数端末からのデータパゲッl〜を、−度に伝送路に送
出することを意味する。各パケット伝送装置は、これを
受信すると、その合成されたデータパケットを分解し、
自己のパケット伝送装置に接続された端末宛のデータパ
ケットを取り出す。
[Operation] When multiple data packets with different destinations are sent from multiple terminals belonging to a certain packet transmission device, that packet transmission device combines them into a new composite data packet, and sends this to the network by broadcast communication. Notify all packet transmission devices within the network. This is done by capturing the token once.
This means that data pages from multiple terminals are sent to the transmission path once. Upon receiving this, each packet transmission device disassembles the combined data packet,
Extracts data packets destined for the terminal connected to its own packet transmission device.

各端末の最大データパケット長を1とし、n台の端末の
データパケットを合成する場合、各パケット伝送装置が
伝送路からデータパケットを受信するために必要なバッ
ファ長は(nX、ll+α)となる、ここで、αは第2
図(3)に示す合成したデータパケット中の宛先及び制
御情報を表すのに必要な長さである。
When the maximum data packet length of each terminal is 1 and the data packets of n terminals are combined, the buffer length required for each packet transmission device to receive the data packet from the transmission path is (nX, ll + α). , where α is the second
This is the length necessary to represent the destination and control information in the combined data packet shown in Figure (3).

[実施例] 以下、本発明の一実施例を図について説明する。[Example] Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

第1図に示すループネットワークにおいて、同じパケッ
ト伝送装置に接続された2つの端末のうち、どちらか一
方だけがデータパケットを送る場合は、従来と同じであ
る。
In the loop network shown in FIG. 1, the case where only one of two terminals connected to the same packet transmission device sends a data packet is the same as in the conventional case.

同じパケット伝送装置に属する2つの端末か、同時に宛
先の異なるデータパケット7.8を送ろうとした場合は
、第2図に示すように、当該2つの端末が属するパケッ
ト伝送装置が、2つのデータパケット7.8を合成し、
同報を示す宛先アドレス91と制御情報92を付加した
新たなデータパケット9を組み立てる。
If two terminals belonging to the same packet transmission device try to send data packets 7.8 to different destinations at the same time, as shown in Figure 2, the packet transmission device to which the two terminals belong will transmit the two data packets. 7. Synthesize 8,
A new data packet 9 is assembled to which a destination address 91 indicating broadcasting and control information 92 are added.

制御情報92には、他の同報通信がパケットと区別する
ための識別コード921、新たに組み立てたデータパケ
ット9中での元のデータパケット7.8の位置を示すポ
インタ922,923等を含む。
The control information 92 includes an identification code 921 for distinguishing packets from other broadcast communications, pointers 922 and 923 indicating the position of the original data packet 7.8 in the newly assembled data packet 9, and the like. .

パケット伝送装置は、この新しく組み立てたデータパケ
ット9を従来と同じ手順でループ伝送路5に送り出す。
The packet transmission device sends out this newly assembled data packet 9 to the loop transmission path 5 using the same procedure as in the conventional method.

これは同報通信となり、全パケット伝送装置1,2,3
.4が受信する。
This is broadcast communication, and all packet transmission devices 1, 2, and 3
.. 4 receives.

ループ伝送路5からデータパケットを受信したパケット
伝送装置は、宛先をチエツクし、宛先か同報でないか、
又は同報であっても識別コード921か複数のデータパ
ケットを合成したことを意味しない場合は、従来と同様
に受信したデータパケットを宛先で示す端末へ渡す。
The packet transmission device that receives the data packet from the loop transmission path 5 checks the destination and determines whether it is a destination or not a broadcast.
Alternatively, even if it is a broadcast, if the identification code 921 does not mean that a plurality of data packets have been combined, the received data packet is passed to the terminal indicated by the destination as in the conventional case.

一方、ループ伝送!i’35から受信したデータパケッ
トの宛先が、同報91で且つ識別コード921が複数の
データパケットを合成したことを表している場合は、制
御情報92中のポインタ922923を基に、元の2つ
のデータパケット7.8に分解する。そして、各々のデ
ータパケット7゜8の宛先711,811を調べ、自分
に接続された端末宛てのデータパケットがあれば、その
データバケンl〜を宛先の端末へ渡す。自分に接続され
た端末宛てのデータパケットが無い場合は、そのデータ
パケットを廃棄する。
On the other hand, loop transmission! If the destination of the data packet received from i'35 is broadcast 91 and the identification code 921 indicates that multiple data packets were combined, the original 2 into two data packets 7.8. Then, the destination 711, 811 of each data packet 7.8 is checked, and if there is a data packet addressed to the terminal connected to itself, the data packet 1~ is passed to the destination terminal. If there is no data packet addressed to the terminal connected to it, that data packet is discarded.

例えば今、端末11がデータパケット7を端末32へ、
端末12がデータパケット8を端末21へ送る場合、パ
ケット伝送装置1は2つのデータパケット7.8を合成
し、同報を示す宛先アドレス91と制御情報92を付加
した新たなデータパケット9を組み立てる。これは同報
通信によって全パケット伝送装置1,2.3.4が受信
する。
For example, now, terminal 11 sends data packet 7 to terminal 32,
When the terminal 12 sends a data packet 8 to the terminal 21, the packet transmission device 1 combines the two data packets 7.8 and assembles a new data packet 9 to which a destination address 91 indicating broadcasting and control information 92 are added. . This is received by all packet transmission devices 1, 2.3.4 by broadcast communication.

各パケット伝送装置は、受信したデータパケットを元の
データパケット7.8に分解し、パケット伝送装置2が
データパケット8を取り出し端末21へ渡す、パケット
装置3はデータパケット7を取り出し端末32へ渡す。
Each packet transmission device disassembles the received data packet into original data packets 7 and 8, packet transmission device 2 takes out data packet 8 and passes it to terminal 21, and packet device 3 takes out data packet 7 and passes it to terminal 32. .

パケット装置1.4は受信データパケットを廃止する。The packet device 1.4 discards the received data packet.

尚、上記の実施例ではネットワークはループ状としたが
、バス状であっても良い。
In the above embodiment, the network is loop-shaped, but it may also be bus-shaped.

[発明の効果] 以上のように、この発明によれば、1台のパケット伝送
装置に接続された複数の端末からの宛先の異なるデータ
パケットを、1回のトークン捕捉により、−度に伝送路
に送出できるため、伝送路に送出するまでのパケット伝
送装置内での滞留時間を短くすることができる。従って
、網内の遅延時間を短くすることができるという効果が
ある。
[Effects of the Invention] As described above, according to the present invention, data packets with different destinations from a plurality of terminals connected to one packet transmission device can be sent to the transmission path at once by capturing a token once. Since the packet can be sent to the transmission path, the residence time within the packet transmission device until the packet is sent to the transmission path can be shortened. Therefore, there is an effect that the delay time within the network can be shortened.

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

第1図は2台の端末を接続したパケット伝送装置をルー
プ伝送路で接続したループ式バケット交換網の概略図、
第2図は本発明において各伝送装置か合成1分解するデ
ータフォーマットの例を示した図である。 図中、1〜4は伝送装置、11〜12,21゜22.3
1.32,41.42は端末、5,6はトークン、7,
8はデータパケット、9は合成したデータパケット、9
1は宛先アドレス、92は制御情報、921は識別コー
ド、922゜923はデータパケットのポインタを示す
Figure 1 is a schematic diagram of a loop bucket switching network in which packet transmission equipment connected to two terminals is connected via a loop transmission path.
FIG. 2 is a diagram showing an example of a data format that is synthesized and decomposed by each transmission device in the present invention. In the figure, 1 to 4 are transmission devices, 11 to 12, 21° 22.3
1.32, 41.42 are terminals, 5, 6 are tokens, 7,
8 is a data packet, 9 is a combined data packet, 9
1 is a destination address, 92 is control information, 921 is an identification code, and 922 and 923 are data packet pointers.

Claims (1)

【特許請求の範囲】[Claims] 1、複数端末を接続したパケット伝送装置を伝送路で接
続したパケット交換網において、同じパケット伝送装置
に属する複数端末からの宛先の異なる複数のデータパケ
ットをそれら端末の属するパケット伝送装置で合成し、
その合成データパケットを同報通信によって網内の全パ
ケット伝送装置に知らしめ、各パケット伝送装置が受信
した上記合成データパケットを分解し、自己のパケット
伝送装置に接続された端末宛のデータパケットを取り出
すことを特徴とするパケット交換網におけるデータ伝送
方式。
1. In a packet switching network in which packet transmission devices connected to multiple terminals are connected by transmission paths, multiple data packets with different destinations from multiple terminals belonging to the same packet transmission device are combined by the packet transmission device to which these terminals belong,
The composite data packet is made known to all packet transmission devices in the network by broadcast communication, and each packet transmission device disassembles the received composite data packet and transmits the data packet addressed to the terminal connected to its own packet transmission device. A data transmission method in a packet-switched network characterized by extraction.
JP23750289A 1989-09-13 1989-09-13 Data transmission system in packet switching network Pending JPH03101334A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP23750289A JPH03101334A (en) 1989-09-13 1989-09-13 Data transmission system in packet switching network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23750289A JPH03101334A (en) 1989-09-13 1989-09-13 Data transmission system in packet switching network

Publications (1)

Publication Number Publication Date
JPH03101334A true JPH03101334A (en) 1991-04-26

Family

ID=17016269

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23750289A Pending JPH03101334A (en) 1989-09-13 1989-09-13 Data transmission system in packet switching network

Country Status (1)

Country Link
JP (1) JPH03101334A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5953708A (en) * 1995-10-06 1999-09-14 Fujitsu Limited Transaction control system having a time delay adjustment transmission mechanism
US7650559B2 (en) 2004-04-02 2010-01-19 Kabushiki Kaisha Toshiba Communication apparatus, communication system, communication method, and communication control program

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5953708A (en) * 1995-10-06 1999-09-14 Fujitsu Limited Transaction control system having a time delay adjustment transmission mechanism
US7650559B2 (en) 2004-04-02 2010-01-19 Kabushiki Kaisha Toshiba Communication apparatus, communication system, communication method, and communication control program
US7743310B2 (en) 2004-04-02 2010-06-22 Kabushiki Kaisha Toshiba Communication apparatus, communication system, communication method, and communication control program

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