JPS63226127A - Simplex radio communication system for preventing interference - Google Patents
Simplex radio communication system for preventing interferenceInfo
- Publication number
- JPS63226127A JPS63226127A JP62060381A JP6038187A JPS63226127A JP S63226127 A JPS63226127 A JP S63226127A JP 62060381 A JP62060381 A JP 62060381A JP 6038187 A JP6038187 A JP 6038187A JP S63226127 A JPS63226127 A JP S63226127A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- radio
- radio wave
- wireless communication
- radio communication
- 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 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims abstract description 43
- 238000000034 method Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 9
- 230000007704 transition Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Landscapes
- Radio Transmission System (AREA)
- Transceivers (AREA)
- Small-Scale Networks (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は各種の無線データ伝送装置の送信・受信切換え
動作時の無線電波空白期間における混信防止単信無線通
信方式に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a simplex wireless communication system for preventing interference during a radio wave blank period during transmission/reception switching operations of various wireless data transmission devices.
本発明はデータ伝送を目的とする単信方式の無線通信機
において、電波有無検出機能を設けると共に送信・受信
切換え動作時に無変調の無線電波が無線通信機(A)(
B)の両者から送出されることにより、無線電波空白期
間を無くし他の無線通信機が同一無線チャネルに電波の
発射をすることも防止するようにした。The present invention provides a simplex type wireless communication device for the purpose of data transmission, which is equipped with a function to detect the presence of radio waves, and when switching between transmission and reception, unmodulated radio waves are transmitted to the wireless communication device (A).
By transmitting from both of B), it is possible to eliminate radio wave blank periods and prevent other radio communication devices from emitting radio waves on the same radio channel.
従来、単信方式の無線データ伝送装置においては、或一
つの無線チャネルを占有してデータ伝送を行なっている
が伝送されるデータの信頼性を向上する手段として一方
的なデータの転送だけでなく複数回のデータの授受を行
なっている。しかし、このデータの授受切換え時即ち、
送信・受信切換え動作時においては必ず該占有無線ヂャ
ネルには無線電波が発射されていない空白期間が生じて
しまうものであった。Conventionally, in simplex wireless data transmission equipment, data is transmitted by occupying one wireless channel, but as a means to improve the reliability of transmitted data, it is possible to not only unilaterally transfer data. Data is sent and received multiple times. However, when switching between sending and receiving this data, that is,
During a transmission/reception switching operation, there always occurs a blank period during which no radio waves are emitted from the occupied radio channel.
以下に従来の単信方式の2台の無線通信機り。Below are two conventional simplex wireless communication devices.
Eの動作状態を時間的に表わしたものを第2図にそって
説明する。A temporal representation of the operating state of E will be explained with reference to FIG.
今、一方の無線通信機りに接続動作開始信号1dが入力
されると無線通信機りは電波有無検出動作2dを行ない
、その無線チャネルに電波が発射されていないと判断す
ると送信動作3dを開始しデータ信号4dを送出する。Now, when the connection operation start signal 1d is input to one of the wireless communication devices, the wireless communication device performs the radio wave presence/absence detection operation 2d, and if it determines that no radio waves are emitted to that wireless channel, it starts the transmission operation 3d. and sends out a data signal 4d.
このときデータ信号4dの送出が終了すると無線通信機
りは直ちに受信動作6dに移る。At this time, when the sending of the data signal 4d is completed, the wireless communication device immediately moves to the receiving operation 6d.
一方、相手の無線通信機Eは無線通信機りからのデータ
信号4dを受信し終わると、或時間経過後送信動作1e
を開始し、データ信号2dを送出する。以後無線通信1
llEの送信動作1eから無線通信1fiDの送信動作
3dに移る時においても同様の動作状態の変遷手順を行
なう。On the other hand, when the other party's wireless communication device E finishes receiving the data signal 4d from the wireless communication device E, after a certain period of time has elapsed, it starts the transmission operation 1e.
and sends out the data signal 2d. From now on, wireless communication 1
A similar operation state transition procedure is performed when moving from the LLE transmission operation 1e to the wireless communication 1fiD transmission operation 3d.
上記のことより無線通信機り、Eの通信状態においては
必ず無線電波空白期間1fが発生することとなってしま
う。As a result of the above, a wireless radio wave blank period 1f always occurs in the communication state of the wireless communication device E.
しかし上述のごとき従来の単信方式の無線データ伝送装
置では、前記無線電波の発射されていない無線電波空白
期間においては、伯の無線通信機にとってその無線チャ
ネルが使用されているという事実を知らしめる手段はな
く、他の無線通信機への妨害を防止する為の電波有無検
出機能は有効に機能することができなかった。However, in the conventional simplex type wireless data transmission device as described above, during the radio wave blank period when radio waves are not being emitted, it is not possible to notify the wireless communication device of the wireless communication device that the wireless channel is being used. There was no way to do so, and the radio wave presence detection function, which was designed to prevent interference with other wireless communication devices, could not function effectively.
そこで本発明は従来のこのような欠点を解決する為に、
単信方式の無線通信機において、データの授受に伴う送
信・受信切換え動作時に無線電波空白期間をなくし、混
信を防止することを目的としている。Therefore, in order to solve these conventional drawbacks, the present invention
In simplex wireless communication equipment, the purpose is to eliminate radio wave blank periods during transmission/reception switching operations associated with data exchange, and to prevent interference.
上記問題点を解決するために、本発明においては、個々
の無線通信機に電波有無機能を設けると共に、一方の無
線通信機のデータ送信が終了し、他方の無線通信機のデ
ータ送信が開始される迄の期間に両者が共に搬送波のみ
の無変調状態での送信状態となる期間を設けることで他
の通信機が同一無線チャネルに介入することを防止する
ようにした。In order to solve the above problems, in the present invention, each wireless communication device is provided with a radio wave presence/absence function, and the data transmission of one wireless communication device is completed and the data transmission of the other wireless communication device is started. By providing a period during which both devices transmit only carrier waves in an unmodulated state, it is possible to prevent other communication devices from interfering with the same radio channel.
上記のような構成によれば、単信方式の無線通信機にお
いてもデータ伝送の授受切換え時に無線電波空白期間が
生ずることはなく、従って他の無線通信機にとっては電
波有無検出機能が有効に機能し、同一無線チャネルに介
入して混信を起こすことが避けられる。According to the above configuration, even in a simplex wireless communication device, a wireless radio wave blank period does not occur when switching between sending and receiving data transmission, and therefore, the radio wave presence detection function functions effectively for other wireless communication devices. However, it is possible to avoid interfering with the same radio channel and causing interference.
以下に本発明の実施例を図面に基づいて説明する。第1
図においてA、Bはデータ伝送を行なう単信方式の2台
の無線通信機の動作状態を時間的に表わしたものである
。Embodiments of the present invention will be described below based on the drawings. 1st
In the figure, A and B temporally represent the operating states of two simplex wireless communication devices that perform data transmission.
今、一方の無線通信1!Aに接続動作開始信号1aが入
力されると無線通信機Aは電波有無検出動作2aを行な
い、その無線チャネルに電波が発射されていないと判断
すると送信動作3aを開始しデータ信号4aを送出する
。このときデータ信号4aの送出が終了しても無線通信
機へは直ちに受信動作6aに移らずに無変調送信動作5
aを或る時間だけ行なう。Now, one side wireless communication 1! When the connection operation start signal 1a is input to A, the wireless communication device A performs a radio wave presence detection operation 2a, and if it determines that no radio waves are emitted to that wireless channel, it starts a transmission operation 3a and sends out a data signal 4a. . At this time, even if the sending of the data signal 4a is completed, the data signal 4a does not immediately proceed to the receiving operation 6a, but is sent to the wireless communication device via the non-modulated transmitting operation 5.
Do step a for a certain amount of time.
一方、相手の無線通信機Bは無線通信tlJIAからの
データ信号4aを受信し終わると、無線通信機Aの無変
調送信動作5aの期間が完了するよりも短い時間で送信
動作1bを開始し、さらに無線通信機Aの無変調送信動
作5aが完了するよりも長い時間後にデータ信号2bを
送出する。以後無線通信機Bの送信動作1bから無線通
信11Aの送信動作3aに移る時においても同様の動作
状態の変遷手順を行なう。上記のことにより無線通信m
A及び無線通信機8の両者がともに送信状態となる送信
電波重複期間1Gが必ず存在することになる為に、第2
図に示す無線電波空白期間1fが発生することを防止で
きる。On the other hand, when the other party's wireless communication device B finishes receiving the data signal 4a from the wireless communication tlJIA, it starts the transmission operation 1b in a shorter time than the period of the non-modulation transmission operation 5a of the wireless communication device A is completed, Further, the data signal 2b is sent out after a period longer than when the non-modulated transmission operation 5a of the wireless communication device A is completed. Thereafter, when moving from the transmission operation 1b of the wireless communication device B to the transmission operation 3a of the wireless communication 11A, the same operation state transition procedure is performed. Due to the above, wireless communication m
Since there is always a transmission radio wave overlap period 1G in which both A and the wireless communication device 8 are in the transmitting state, the second
It is possible to prevent the radio wave blank period 1f shown in the figure from occurring.
第3図において、制御部1は接続動作開始信号9が入力
されると受信制御信号3を送出し受信部2を動作状態に
する。受信部2は電波有無検出回路5を通じて電波有無
信号4を制御部1に送る。In FIG. 3, when a connection operation start signal 9 is input, the control section 1 sends out a reception control signal 3 to put the reception section 2 into an operating state. The receiving section 2 sends a radio wave presence/absence signal 4 to the control section 1 through the radio wave presence detection circuit 5 .
この時、制御部1は電波が無いと判断すると送信部6に
対して送信制御信号7を送出し送信部6を動作状態とし
て、ある一定時間経過後に送信データ信号8を送出し、
この送信データ信号8の送出が終了するとある一定時間
経過後に送信制御信号7を送出し送信部6の動作を停止
し受信動作とする。At this time, if the control section 1 determines that there is no radio wave, it sends out a transmission control signal 7 to the transmission section 6, puts the transmission section 6 into an operating state, and after a certain period of time has passed, sends out a transmission data signal 8.
When the transmission of the transmission data signal 8 is completed, a transmission control signal 7 is transmitted after a certain period of time has elapsed, and the operation of the transmission section 6 is stopped to perform a reception operation.
本発明は以上説明したよ、うに、単信方式に簡単な動作
を追加するだけで混信を防止できると共に、電波有無検
出機能を有する他の無線通信機にとっても誤って無線チ
ャネルが未使用であると判断することを防止でき無駄な
電波の使用を回避できることになる。As explained above, the present invention can prevent interference by simply adding a simple operation to the simplex system, and can also prevent other wireless communication devices having a radio wave presence/absence detection function from mistakenly leaving a wireless channel unused. Therefore, it is possible to prevent unnecessary use of radio waves.
第1図は本発明の実施例を示す動作変遷図、第2図は従
来の技術における動作変遷図、第3図は本発明の実施例
を示すブロック図である。
A、B、D、E・・・単信方式の無線通信機、1a。
1d、9・・・接続動作開始信号、2a、2d・・・電
波有無検出動作、3a、ib、3d、1e・・・送信動
作、4a、2b、4d、2e−・・データ信号、5a・
・・無変調送信動作、1G・・・送信電波重複期間、1
f・・・無線電波空白期間、1・・・制御部、2・・・
受信部、3・・・送信部、5・・・電波有無検出回路、
4・・・電波有無信号である。FIG. 1 is an operational transition diagram showing an embodiment of the present invention, FIG. 2 is an operational transition diagram of a conventional technique, and FIG. 3 is a block diagram showing an embodiment of the present invention. A, B, D, E... Simplex wireless communication device, 1a. 1d, 9... Connection operation start signal, 2a, 2d... Radio wave presence detection operation, 3a, ib, 3d, 1e... Transmission operation, 4a, 2b, 4d, 2e-... Data signal, 5a.
・・Unmodulated transmission operation, 1G ・・Transmission radio wave overlap period, 1
f... Radio wave blank period, 1... Control unit, 2...
Receiving section, 3... Transmitting section, 5... Radio wave presence/absence detection circuit,
4... Radio wave presence/absence signal.
Claims (2)
おいて、電波有無検出機能を設けると共に、或る1つの
無線チャネルを占有してデータの授受を行なう場合に無
線電波がとぎれることなく相互の通信が行なわれること
を特徴とする混信防止単信無線通信方式。(1) In a simplex wireless communication device for the purpose of data transmission, it is equipped with a function to detect the presence or absence of radio waves, and when exchanging data by occupying a certain radio channel, it is possible to mutually communicate without interruption of the radio waves. An interference-preventing simplex wireless communication system characterized by the following:
態にあって一区切りのデータの送出が終了した時点で直
ちに無線電波の送出を止めずに無変調の状態で或る一定
時間だけ送信動作を継続し、他方の通信機は該無変調の
無線電波の送出時間が終了する時間よりも短かい時間で
送信動作を開始することを特徴とする特許請求の範囲第
1項の混信防止単信無線通信方式。(2) In the wireless communication device, when one of the communication devices is in a transmitting state and the sending of one section of data is finished, the sending of radio waves is not stopped immediately, but the transmitting operation is performed for a certain period of time in an unmodulated state. The interference prevention simplex according to claim 1, characterized in that the other communication device starts the transmission operation in a time shorter than the time when the transmission time of the unmodulated radio waves ends. Wireless communication method.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62060381A JPS63226127A (en) | 1987-03-16 | 1987-03-16 | Simplex radio communication system for preventing interference |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62060381A JPS63226127A (en) | 1987-03-16 | 1987-03-16 | Simplex radio communication system for preventing interference |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63226127A true JPS63226127A (en) | 1988-09-20 |
Family
ID=13140509
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62060381A Pending JPS63226127A (en) | 1987-03-16 | 1987-03-16 | Simplex radio communication system for preventing interference |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63226127A (en) |
-
1987
- 1987-03-16 JP JP62060381A patent/JPS63226127A/en active Pending
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