JPH03132233A - Lan communication system - Google Patents
Lan communication systemInfo
- Publication number
- JPH03132233A JPH03132233A JP1270762A JP27076289A JPH03132233A JP H03132233 A JPH03132233 A JP H03132233A JP 1270762 A JP1270762 A JP 1270762A JP 27076289 A JP27076289 A JP 27076289A JP H03132233 A JPH03132233 A JP H03132233A
- Authority
- JP
- Japan
- Prior art keywords
- lan
- address
- transmission
- communication equipment
- bit
- 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
- 238000004891 communication Methods 0.000 title abstract description 35
- 230000005540 biological transmission Effects 0.000 claims abstract description 35
- 238000001514 detection method Methods 0.000 abstract description 3
- 101100172132 Mus musculus Eif3a gene Proteins 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
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- Small-Scale Networks (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はＬＡＮ（Ｌｏｃａｌ Ａｒｅａ Ｎｅｔｗｏｒ
ｋ）通信方式に係り、特に、アドレスのビット送出順序
が異なるＬＡＮを相互接続する場合に好適なＬＡＮ通信
方式に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to LAN (Local Area Network).
k) It relates to a communication system, and particularly relates to a LAN communication system suitable for interconnecting LANs with different address bit transmission orders.
ＬＡＮは、アクセス制御方式によってアドレスのビット
送出順序が異なることがある６例えば、伝送路上の信号
（キャリア）の有無により伝送路が他の装置で使われて
いない゛か確認した後、送信を開始するＣ８ＭＡ／ＣＤ
（搬送波検知多重アクセス／衝突検出）方式では、第
２図（ａ）に示すように、 アドレスは２°ビツトから
送出すると定義されている（ＩＥＥＥ８０２．３標準）
、また、伝送路上に一つのトークンと呼ばれる送信許可
権を示す制御情報を巡回させておき、このトークンを受
取った装置のみがデータを送信するトークンリング方式
では、第２図（ｂ）に示すように、アドレスは２７ビツ
トから送出すると定義されている（ＩＥＥＥ８０２．５
標準）、このようにアドレスのビット送出順序が異なる
ＬＡＮを相互接続して通信を行う場合、従来は、各々の
ＬＡＮの通信装置が、それぞれ相手装置のＬＡＮのビッ
ト定義に合わせてアドレスを送受信していた。In a LAN, the address bit sending order may differ depending on the access control method6. For example, after checking whether the transmission path is not being used by another device by checking the presence or absence of a signal (carrier) on the transmission path, transmission begins. C8MA/CD
In the (carrier detection multiple access/collision detection) method, as shown in Figure 2 (a), it is defined that the address is sent starting from the 2° bit (IEEE 802.3 standard).
In addition, in the token ring method, control information indicating transmission permission called a token is circulated on the transmission path, and only the device that receives this token transmits data, as shown in Figure 2 (b). It is defined that the address is sent starting from 27 bits (IEEE802.5
Conventionally, when LANs with different address bit transmission orders are interconnected for communication, each LAN's communication device sends and receives addresses according to the LAN bit definition of the other device. was.
上記従来技術では、アドレスのビット送出順序が相違す
る異種のＬＡＮを相互接続して通信する場合、通信装置
が一々相手装置のＬＡＮのアクセス制御方式を意識して
アドレスを送出しなければならず、通信装置の負担が非
常に増大する問題があった。In the above-mentioned conventional technology, when communicating by interconnecting different types of LANs with different address bit transmission orders, each communication device must send an address while being aware of the access control method of the LAN of the other device. There was a problem in that the burden on the communication device increased significantly.
本発明の目的は、個々の通信装置の負担を増大させずに
、ＬＡＮのプロトコルの相異によるアドレスのビット送
出順序の違いを吸収することにある。An object of the present invention is to absorb differences in address bit sending order due to differences in LAN protocols without increasing the burden on individual communication devices.
上記目的を達成するために、本発明は、アドレスのビッ
ト送出順序が異なるＬＡＮの間にアドレス変換装置を介
在させ、該アドレス変換装置において、一方のＬＡＮの
通信装置から送出されるアドレスを、他方のＬＡＮのビ
ット送出定義に合わせて、該他方のＬＡＮの通信装置へ
送出するようにしたことである。In order to achieve the above object, the present invention interposes an address translation device between LANs in which addresses have different bit transmission orders, and in the address translation device, an address sent from a communication device of one LAN is transferred to another LAN. The bit transmission definition of the other LAN is transmitted to the communication device of the other LAN.
アドレス変換装置において、一方のＬＡＮからのアドレ
スを他方のＬＡＮへ、当該他方のＬＡＮのビット定義に
合せて送出し直すことにより、個々の通信装置では相手
装置のＬＡＮのアクセス制御方式を全く意識する必要が
なくなる。In the address conversion device, by re-sending the address from one LAN to the other LAN in accordance with the bit definition of the other LAN, each communication device is completely aware of the access control method of the other device's LAN. There will be no need.
以下１本発明の一実施例について図面により説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例を示すシステム構成図である
。ここで、通信装置２はＣＳ ＭＡ／ＣＤ方式のＬＡＮ
（以下、ＬＡＮ−Ａと称す）に属し、通信装置［３は
トークンリング方式のＬＡＮ （以下。FIG. 1 is a system configuration diagram showing an embodiment of the present invention. Here, the communication device 2 is a CS MA/CD type LAN.
(hereinafter referred to as LAN-A), the communication device [3 is a token ring type LAN (hereinafter referred to as LAN-A).
ＬＡＮ−Ｂと称す）に属しているとする６通信装置２は
ＬＡＮ−ＡのＬＡＮ伝送路４を通してアドレス変換装置
１１に接続され、通信装置３はＬＡＮ−ＢのＬＡＮ伝送
路５を通して同じくアドレス変換装置１に接続される。6 communication device 2 belonging to LAN-B) is connected to address conversion device 11 through LAN transmission path 4 of LAN-A, and communication device 3 also performs address conversion through LAN transmission path 5 of LAN-B. Connected to device 1.
ＬＡＮ−Ａの通信装置２からＬＡＮ−Ｂの通信装置３に
対してデータを伝送する場合、通信装置２では通信製［
３のアクセス制御方式を意識することなく、ＬＡＮ−Ａ
のＬＡＮ伝送路４ヘアドレスを最下位ビット（２’）か
ら送出する。アドレス変換装置１は、送受信回路１１に
おいて通信装置２からのアドレスを受信した後、アドレ
ス変換機構１３において、送受信制御部１４の制御下で
該アドレスの送出順序をＬＡＮ−Ｈのビット送出定義に
合わせて変換し、送受信回路１２からＬＡＮ−ＢのＬＡ
Ｎ伝送路５へ送出する。これにより。When transmitting data from the communication device 2 of LAN-A to the communication device 3 of LAN-B, the communication device 2
LAN-A without being aware of the access control method of 3.
The address is sent to the LAN transmission path 4 starting from the least significant bit (2'). After the address translation device 1 receives the address from the communication device 2 in the transmission/reception circuit 11, the address translation mechanism 13 adjusts the transmission order of the address under the control of the transmission/reception control section 14 in accordance with the bit transmission definition of LAN-H. from the transmitter/receiver circuit 12 to the LA of LAN-B.
Send it to N transmission line 5. Due to this.
通信製［１３では異種の通信装置２からのアドレスを正
常に受信できる。逆に、ＬＡＮ−Ｂの通信装置［３から
ＬＡＮ−Ａの通信装置２に対してデータを伝送する場合
も、通信製［３では通信装置２のアクセス制御方式を意
識することなく、ＬＡＮ−ＢのＬＡＮ伝送路５ヘアドレ
スを最上位ビット（２７）から送出する。アドレス変換
装置１は、この通信装置１３からのアドレスを送受信回
路７で受信し、送受信制御部１４の制御下で、アドレス
変換機構１３において該アドレスの送出順序をＬＡＮ−
Ａのビット送出定義に合わせて変換し、送受信回路１１
からＬＡＮ−ＡのＬＡＮ伝送路４へ送出する。二九によ
り、通信製［２では異種の通信製Ｗ１３からのアドレス
を正常に受信できる。The communication device [13] can normally receive addresses from different types of communication devices 2. Conversely, when transmitting data from the LAN-B communication device [3 to the LAN-A communication device 2, the LAN-B communication device The address is sent to the LAN transmission line 5 from the most significant bit (27). The address translation device 1 receives the address from the communication device 13 in the transmitting/receiving circuit 7, and under the control of the transmitting/receiving control section 14, the address translation mechanism 13 changes the sending order of the address from the LAN to the
Convert it according to the bit sending definition of A and transmit/receive circuit 11
from there to the LAN transmission line 4 of LAN-A. 29, Tsushin [2] can normally receive an address from a different type of Tsushin W13.
第３図はアドレス変換機構１３でのアドレス送出順序の
変換例を示したものである。これ＆よユビットの反転を
上位バイトから実施する場合であるが、アドレスの個別
アドレスビット／グループアドレ゛スピット等は相互接
続されるＬＡＮのプロトコルに従い変換される。これら
の制御は送受信制御部１４から指示される。FIG. 3 shows an example of conversion of the address sending order by the address conversion mechanism 13. In the case where the bits are inverted from the upper byte, the individual address bits/group address pits, etc. of the address are converted according to the protocol of the interconnected LAN. These controls are instructed by the transmission/reception control section 14.
なお、本実施例では、Ｃ８ＭＡ／ＣＤ方式のＬＡＮとト
ークンリング方式のＬＡＮが相互接続される場合につい
て説明したが、本発明は、これに限定されないことは云
うまでもない。In this embodiment, a case has been described in which a C8MA/CD type LAN and a token ring type LAN are interconnected, but it goes without saying that the present invention is not limited to this.
以上の説明から明らかな如く、本発明によれば、各々の
通信装置が相手のアクセス制御方式を全く意識すること
なく、アドレスの送出順序が異なるＬＡＮを相互接続す
ることが容易に可能になる。As is clear from the above description, according to the present invention, it is possible to easily interconnect LANs in which addresses are sent in different orders, without each communication device being aware of the other party's access control method at all.
第１図は本発明の一実施例のシステム構成図。
第２図はＬＡＮによるアドレスのビット送出順序の相違
を説明する図、第３図はアドレスのビット送出順序の変
換例を示す図である。
１・・・アドレス変換装置、 ２，３・・・通信装置。
４．５・・・ＬＡＮ伝送路、
１１．１２・・・送受信回路、
１３・・・アドレス変換機端、
１４・・・送受信制御部。FIG. 1 is a system configuration diagram of an embodiment of the present invention. FIG. 2 is a diagram illustrating the difference in address bit transmission order depending on the LAN, and FIG. 3 is a diagram illustrating an example of conversion of the address bit transmission order. 1... Address translation device, 2, 3... Communication device. 4.5... LAN transmission path, 11.12... Transmission/reception circuit, 13... Address converter end, 14... Transmission/reception control unit.
Claims (1)
レス変換装置を介して相互接続し、該アドレス変換装置
において、一方のＬＡＮの装置から送出されるアドレス
を、他方のＬＡＮのビット送出定義に合わせて、該他方
のＬＡＮの装置へ送出することを特徴とするＬＡＮ通信
方式。(1) LANs with different address bit transmission orders are interconnected via an address translation device, and the address translation device adjusts the address sent from the device of one LAN to the bit transmission definition of the other LAN. , to a device on the other LAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1270762A JPH03132233A (en) | 1989-10-18 | 1989-10-18 | Lan communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1270762A JPH03132233A (en) | 1989-10-18 | 1989-10-18 | Lan communication system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03132233A true JPH03132233A (en) | 1991-06-05 |
Family
ID=17490638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1270762A Pending JPH03132233A (en) | 1989-10-18 | 1989-10-18 | Lan communication system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03132233A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5396495A (en) * | 1991-01-18 | 1995-03-07 | National Semiconductor Corporation | Hub management bus architecture for repeater interface controller |
-
1989
- 1989-10-18 JP JP1270762A patent/JPH03132233A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5396495A (en) * | 1991-01-18 | 1995-03-07 | National Semiconductor Corporation | Hub management bus architecture for repeater interface controller |
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