JPS61170159A - Multiple address system - Google Patents
Multiple address systemInfo
- Publication number
- JPS61170159A JPS61170159A JP996685A JP996685A JPS61170159A JP S61170159 A JPS61170159 A JP S61170159A JP 996685 A JP996685 A JP 996685A JP 996685 A JP996685 A JP 996685A JP S61170159 A JPS61170159 A JP S61170159A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- reservation
- terminal device
- information
- central processing
- 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.)
- Granted
Links
Landscapes
- Time-Division Multiplex Systems (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔１産業上の利用分野〕
本発明は、複数の端末装置が１つの双方向通信回線を用
いて、中央処理装置と通信を行なう多元接続方式におい
゛て、複数の端末装置がバースト信号をランダムに送信
しようとする場合に、通信回線を効率的に使用すること
のできる制御方式に関するものである。[Detailed Description of the Invention] [1. Field of Industrial Application] The present invention is directed to a multiple access system in which a plurality of terminal devices communicate with a central processing unit using one bidirectional communication line. The present invention relates to a control method that allows efficient use of communication lines when a terminal device attempts to randomly transmit burst signals.
従来のこの種の制御方式について説明すると、例えば自
動車電話等の無線通信方式においては、端末装置から情
報の送出に先立って一定の周波数のトーン信号あるいは
特定の連続パターンのディジタル信号（これらはプリア
ンブル信号と呼ばれる）を送出し、中央処理装置側でこ
れをフィルタ等により検出して、このプリアンブル信号
によって複数の端末装置から中央処理装置への同時送信
による信号の衝突を防ぐように制御していた。To explain this type of conventional control method, for example, in a wireless communication method such as a car phone, a tone signal of a certain frequency or a digital signal of a specific continuous pattern (these are preamble signals) is used before sending information from a terminal device. This is detected by a filter or the like on the central processing unit side, and the preamble signal is used to prevent signal collisions caused by simultaneous transmission from multiple terminal devices to the central processing unit.
第１図はこのような従来の多元接続方式を説明する図で
あって、１は中央処理装置、２１〜２１ｎはそれぞれ端
末装置を表わしている。FIG. 1 is a diagram illustrating such a conventional multiple access system, in which 1 represents a central processing unit and 21 to 21n each represent a terminal device.
第２図はタイムチャートであって、 ３．７はプリアン
ブル信号、 ４．８は情報信号、５．５′はアイドル信
号、６はビジー信号を表わし ′ている。FIG. 2 is a time chart in which 3.7 represents a preamble signal, 4.8 an information signal, 5.5' an idle signal, and 6 a busy signal.
第１図に示すように、１つの中火処理装置１に対して、
多数の端末装置２１〜２ｎが存在するため、複数の端末
装置が同時に中央処理装置１に対して信号を送信すると
、信号の衝突が発生する。As shown in FIG. 1, for one medium heat treatment device 1,
Since there are a large number of terminal devices 21 to 2n, if a plurality of terminal devices transmit signals to the central processing unit 1 at the same time, signal collision will occur.
このような信号の衝突を防ぐため、従来の上り回！（端
末装置→中央処理装置）の信号には、第２図に示すよう
にプリアンブル信号３または７等を前置することにより
、中央処理装置が上り信号を早期に検出して、下り信号
（中央処理装置→端末装置）で他の端末装置に送信禁止
信 □号（ビジー信号）を報知することが行なわれ
ている。To prevent such signal collisions, the conventional uplink! By prefixing the signal from the terminal device to the central processing unit with a preamble signal 3 or 7, etc., as shown in Figure 2, the central processing unit can detect the upstream signal early, and the downstream signal (central Processing device→terminal device) broadcasts a transmission prohibition signal □ signal (busy signal) to other terminal devices.
このような従来の多元接続方式においては、第１２図に
示すように最初の端末装置が信号を送１出してからビジ
ー信号が報知されるまで（第２図におけるＴの間）に他
の端末装置が信号の送出８を開始した場合には、ビジー
信号６が報知されても、後から信号を送出した端末装置
では、該ビジー信号６と自分の送信した信号に対応する
ビジー信号との区別がつかない。そのため、信号の送信
が続行されて信号の情報部分（第２図では情報４と情報
８）が衝突によりすべて失われるとともに、信号の送信
が続けられている間は他の端末装置からの信号送出がで
きないという欠点があった。In such a conventional multiple access system, as shown in Fig. 12, from the time the first terminal device sends a signal until the busy signal is broadcast (during time T in Fig. 2), other terminals When a device starts transmitting a signal 8, even if a busy signal 6 is broadcast, a terminal device that transmits a signal later cannot distinguish between the busy signal 6 and the busy signal corresponding to the signal transmitted by itself. I can't stand it. Therefore, as the signal transmission continues, the information part of the signal (information 4 and information 8 in Figure 2) is completely lost due to collision, and while the signal transmission continues, the signal transmission from other terminal devices The drawback was that it was not possible.
本発明は、上述のように複数の信・号が衝突した場合に
もすべての情報が送信されるという欠点を除去するため
、始めに予約信号のみを従来の方式で送信し、該予約信
号が衝突することなく中央処理装置で受信さＫた場合に
のみ引軽続いて情報信号を送信することにより、衝突し
た場合に無効に回線が使用される時間を短くして、回線
の利用効率を良くしようとするものである。In order to eliminate the drawback that all information is transmitted even when multiple signals/signals collide as described above, the present invention first transmits only the reservation signal using the conventional method, and the reservation signal is By transmitting the information signal only when the information signal is received by the central processing unit without a collision, the time that the line is used ineffectively in the event of a collision is shortened and the line is used more efficiently. This is what I am trying to do.
１以下、本発明の構成等に関し、実施例の図面１を用い
て詳細に説明す墨。 “
〔実施例〕 □゛第３図は本
発明の１実施例の信号の送受信に係る制御を示す流れ図
であって、（、）は中央処理装置における制御、（ｂ）
は端末装置における制御を示している。1 Below, the configuration of the present invention will be explained in detail using Drawing 1 of the embodiment. “ [Embodiment] □゛Figure 3 is a flowchart showing control related to signal transmission and reception in one embodiment of the present invention, (,) indicates control in the central processing unit, (b)
indicates control at the terminal device.
以下、第３図の流れ図を基に端末装置からの信号が正常
に受信されたｉ合とｉ帯間の衝突が発生した場合に分け
でタイムチ竿−トにより説萌子る。 −、・
・ −”第４図１′よ呆発明の実施例の送受信信号
のタイメギヤードであって、端末装置と中央処理装置−
で信号が衝突せずに送受信された場合を表わしている゛
。 □ ・
−４図に示すよ゛うに、端末装−で情報の蓬信門求が発
生すると、端末装置は下り回線゛で″アイドル信号が報
知されるのを待ち、アイドル信号９を受信すると°°、
ブリ°ア゛ンプル信号１０を前置した予約（ｉ４ｒ１を
上り回線で送出ｔｊ。中央処理装置は上り回線でブリ゛
アンプル信号１０を１受信すると下り回線のアイドル信
号９をビジー信号１２に変え、さら、に上り回線で予約
信号１１を受信すると下り回線に予約確認信号１３と情
報信号１４の長さに応じた□ビジー信号１５を゛送出′
する。Hereinafter, based on the flowchart of FIG. 3, explanations will be given using time charts in cases where the signal from the terminal device is normally received and cases where a collision occurs between the i bands. −、・
・-"FIG. 4 1' shows the time gearing of the transmitting and receiving signals according to the embodiment of the invention, which includes the terminal device and the central processing unit.
This represents the case where signals are sent and received without collision. □ ・ As shown in Figure 4, when a request for information occurs at the terminal device, the terminal device waits for an idle signal to be broadcast on the downlink, and when it receives the idle signal 9. °,
Reservation (i4r1 is sent on the uplink) with a prefixed simple signal 10. When the central processing unit receives one full sample signal 10 on the uplink, it changes the idle signal 9 on the downlink to a busy signal 12, Furthermore, when the reservation signal 11 is received on the uplink, a busy signal 15 corresponding to the length of the reservation confirmation signal 13 and information signal 14 is sent to the downlink.
do.
端末装置は下り回線で自分の予約確認信号１３を受信す
ると直ちに□上り回線で情報信号１４を送信する。この
時、端末装置が予約確認信号が自分の予約確認信号吾で
ある二゛とを認識する方法として次の２通り゛が上げら
れる。Immediately after the terminal device receives its own reservation confirmation signal 13 on the downlink, it transmits an information signal 14 on the uplink. At this time, there are two methods for the terminal device to recognize that the reservation confirmation signal is its own reservation confirmation signal.
その一つは、中央処理装置が予約信号受信後、直ちに予
約確認信号を送信する方法であって、該予約信号を送信
しム端末装置は自分が送信した直後に受信した予約゛確
認信号を自分に対して報知“された予約確認信号である
と認識することがでトる。 ”
他の一つは予約□信号および予約確認信号に端末識別情
報を含ませる方法であって、中央路゛埋装置が予約信号
を受信してから任意の時間後に予約確認信号を送信して
も、端末装置は端末熾別情報を読むことにより自分に対
して報知された予約確認信号であることを認識できる。One of them is a method in which the central processing unit immediately transmits a reservation confirmation signal after receiving the reservation signal, and the terminal device that transmits the reservation signal receives the reservation confirmation signal by itself. The other method is to include terminal identification information in the reservation□ signal and the reservation confirmation signal. Even if the device transmits the reservation confirmation signal after an arbitrary period of time after receiving the reservation signal, the terminal device can recognize that the reservation confirmation signal was broadcast to itself by reading the terminal classification information.
前者の方法の場合は、予約信号は衝突が検出できるよう
なパターンをのせていればよく、予約確認信号も情報を
のせる必要がないため、信号長を短くすることができる
。In the case of the former method, the reservation signal only needs to carry a pattern that allows collision to be detected, and the reservation confirmation signal does not need to carry any information, so the signal length can be shortened.
後者の方法の場合は、中央処理装置が予約信号を受信し
てから予約確認信号を送信するまでの時間的な制約がな
いので、中央処理装置での処理時間を自由に設定できる
とともに、予約確認信号を送信するまでの時間に他の予
約信号を受は付けることも可能である。In the case of the latter method, there is no time restriction from when the central processing unit receives the reservation signal until it sends the reservation confirmation signal, so the processing time in the central processing unit can be freely set, and the reservation confirmation signal is not limited. It is also possible to accept and accept other reservation signals during the time before transmitting the signal.
第５図は本発明の実施例の送受信信号のタイムチャート
であって、信号の衝突が発生した場合を表わしている。FIG. 5 is a time chart of transmitted and received signals according to an embodiment of the present invention, and shows a case where signal collision occurs.
端末装置１および２が中央処理装置のプリアンブル信号
検出時間内に同時に予約信号１６および１７をそれぞれ
送信したときは、信号間で衝突が発生し、中央処理装置
ではプリアンブル年号は受信したが予約信号が判読でき
ないので信号が衝突していることがわかる。When terminal devices 1 and 2 simultaneously transmit reservation signals 16 and 17, respectively, within the preamble signal detection time of the central processing unit, a collision occurs between the signals, and the central processing unit receives the preamble year number but does not receive the reservation signal. It can be seen that the signals are colliding because it cannot be read.
中央処理装置は、プリアンブル信号１８および１９を受
信すると予約信号の長さに等しいビジー信号２０を送出
するが、予約信号が判読で外す信号が衝突していること
が分かった時は、その後アイドル信号２１を送出する。When the central processing unit receives the preamble signals 18 and 19, it sends out a busy signal 20 equal to the length of the reservation signal, but if the reservation signal is deciphered and it is found that there is a conflict, then it sends an idle signal. 21 is sent.
端末装置では予約確認信号が受信できないので情報信号
を送信することをせず、必要に応じて一定時間後に予約
信号を再送することになる。Since the terminal device cannot receive the reservation confirmation signal, it does not transmit the information signal, but retransmits the reservation signal after a certain period of time if necessary.
このように、予約信号が衝突した場合は情報信号は送出
されず、直ちにアイドル信号が報知されるので、衝突に
よって無効になった情報信号によって長時間回線が使用
されることを防止とすることが出来る。In this way, if reservation signals collide, an information signal is not sent and an idle signal is immediately broadcast, so it is possible to prevent the line from being used for a long time due to an information signal that has become invalid due to a collision. I can do it.
以上説明したように、本発明の方式によれば多元接続方
式の系において、信号の衝突が発生した場合に無効な信
号によって回線が使用される時間を短縮できるから、効
率の良い通信系を構１成することがで外る利点がある。As explained above, according to the system of the present invention, when a signal collision occurs in a multiple access system, the time that a line is used due to an invalid signal can be shortened, so an efficient communication system can be constructed. There is an advantage to being successful by achieving one.
第１図は従来の多元接続方式を説明する図、第２図は従
来の方式の送受信信号のタイムチャート、第３図は本発
明の一実施例の信号の送受信に係る制御を示す流れ図、
第４図、第５図は本発明の一実施例の送受信信号の矛イ
ムチャートである。
１ ・・・・・・中央処理装置、 ２１〜２ｎ・・・
・・・端末装置、 ３．７．１０，１８．１９ ・・・
出プリアンブル信号、 ４．８．１４ ・・・・・・情
報信号、 ５．５′、９．２１ ・・・・・・アイド
ル信号、６．１２．１５．２ｏ ・・・・・・ ビジー
信号、１１．１６．１７ ・・・・・・予約信号、
１３ ・・・・・・予約確認信号FIG. 1 is a diagram explaining a conventional multiple access system, FIG. 2 is a time chart of transmission and reception signals of the conventional system, and FIG. 3 is a flowchart showing control related to signal transmission and reception according to an embodiment of the present invention.
FIGS. 4 and 5 are time charts of transmitted and received signals according to an embodiment of the present invention. 1...Central processing unit, 21~2n...
...Terminal device, 3.7.10, 18.19 ...
Output preamble signal, 4.8.14...Information signal, 5.5', 9.21...Idle signal, 6.12.15.2o...Busy signal , 11.16.17 ...Reservation signal,
13... Reservation confirmation signal
Claims (1)
線で接続されていて、端末装置がプリアンブル信号を前
置した信号を送出して、中央処理装置が該プリアンブル
信号を検出したとき他の端末装置の送信を禁止する信号
を報知する通信方式において、端末装置がプリアンブル
信号を前置した予約信号を送信し、中央処理装置が該予
約信号を他の端末装置の信号と衝突することなく受信し
た場合に該当する端末装置に対する予約確認信号を報知
すると共に他の端末装置の送信を禁止する信号を報知し
、該当する端末装置は該予約確認信号を受信した場合に
のみ情報信号を送信することを特徴とする多元接続方式
。When a central processing unit and a plurality of terminal devices are connected through a common two-way communication line, and the terminal device sends out a signal prefixed with a preamble signal, and the central processing unit detects the preamble signal, other In a communication system that broadcasts a signal that prohibits transmission by a terminal device, the terminal device transmits a reservation signal prefixed with a preamble signal, and the central processing unit receives the reservation signal without colliding with signals from other terminal devices. In this case, a reservation confirmation signal is broadcast to the corresponding terminal device, and a signal is also broadcast to prohibit transmission from other terminal devices, and the corresponding terminal device transmits an information signal only when it receives the reservation confirmation signal. A multiple access method featuring:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP996685A JPS61170159A (en) | 1985-01-24 | 1985-01-24 | Multiple address system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP996685A JPS61170159A (en) | 1985-01-24 | 1985-01-24 | Multiple address system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61170159A true JPS61170159A (en) | 1986-07-31 |
| JPH0476254B2 JPH0476254B2 (en) | 1992-12-03 |
Family
ID=11734672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP996685A Granted JPS61170159A (en) | 1985-01-24 | 1985-01-24 | Multiple address system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61170159A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01166628A (en) * | 1987-12-22 | 1989-06-30 | Fujitsu Ltd | Digital subscriber radio system |
| JPH0311742U (en) * | 1989-06-19 | 1991-02-06 | ||
| US7154875B2 (en) | 1995-08-10 | 2006-12-26 | Hitachi, Ltd. | CDMA mobile communication system and communication method |
| JP2007502059A (en) * | 2003-08-08 | 2007-02-01 | クリプサル インテグレイテッド システムズ ピーティーワイ リミテッド | Collision detection in non-dominant bit wireless network communication systems |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513804A (en) * | 1974-06-29 | 1976-01-13 | Kokusai Denshin Denwa Co Ltd | |
| JPS5799054A (en) * | 1980-12-12 | 1982-06-19 | Oki Electric Ind Co Ltd | Polling system |
| JPS59183552A (en) * | 1983-04-04 | 1984-10-18 | Hitachi Ltd | Multiplex accessing system |
| JPS59231947A (en) * | 1983-06-15 | 1984-12-26 | Matsushita Electric Works Ltd | Time division multiplex transmission system |
-
1985
- 1985-01-24 JP JP996685A patent/JPS61170159A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513804A (en) * | 1974-06-29 | 1976-01-13 | Kokusai Denshin Denwa Co Ltd | |
| JPS5799054A (en) * | 1980-12-12 | 1982-06-19 | Oki Electric Ind Co Ltd | Polling system |
| JPS59183552A (en) * | 1983-04-04 | 1984-10-18 | Hitachi Ltd | Multiplex accessing system |
| JPS59231947A (en) * | 1983-06-15 | 1984-12-26 | Matsushita Electric Works Ltd | Time division multiplex transmission system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01166628A (en) * | 1987-12-22 | 1989-06-30 | Fujitsu Ltd | Digital subscriber radio system |
| JPH0311742U (en) * | 1989-06-19 | 1991-02-06 | ||
| US7154875B2 (en) | 1995-08-10 | 2006-12-26 | Hitachi, Ltd. | CDMA mobile communication system and communication method |
| US7251230B2 (en) | 1995-08-10 | 2007-07-31 | Hitachi Communication Technologies, Ltd. | CDMA mobile communication system and communication method |
| US8867475B2 (en) | 1995-08-10 | 2014-10-21 | Fipa Frohwitter Intellectual Property Ag | CDMA mobile communication system and communication method |
| JP2007502059A (en) * | 2003-08-08 | 2007-02-01 | クリプサル インテグレイテッド システムズ ピーティーワイ リミテッド | Collision detection in non-dominant bit wireless network communication systems |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0476254B2 (en) | 1992-12-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |