JPH0532930B2 - - Google Patents
Info
- Publication number
- JPH0532930B2 JPH0532930B2 JP57186428A JP18642882A JPH0532930B2 JP H0532930 B2 JPH0532930 B2 JP H0532930B2 JP 57186428 A JP57186428 A JP 57186428A JP 18642882 A JP18642882 A JP 18642882A JP H0532930 B2 JPH0532930 B2 JP H0532930B2
- Authority
- JP
- Japan
- Prior art keywords
- commercial power
- signal
- information
- power supply
- superimposed
- 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.)
- Expired - Lifetime
Links
- 238000004891 communication Methods 0.000 claims description 32
- 230000005540 biological transmission Effects 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 8
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 13
- 230000003321 amplification Effects 0.000 description 6
- 238000003199 nucleic acid amplification method Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012790 confirmation Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B3/00—Line transmission systems
- H04B3/54—Systems for transmission via power distribution lines
- H04B3/542—Systems for transmission via power distribution lines the information being in digital form
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5408—Methods of transmitting or receiving signals via power distribution lines using protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2203/00—Indexing scheme relating to line transmission systems
- H04B2203/54—Aspects of powerline communications not already covered by H04B3/54 and its subgroups
- H04B2203/5404—Methods of transmitting or receiving signals via power distribution lines
- H04B2203/5416—Methods of transmitting or receiving signals via power distribution lines by adding signals to the wave form of the power source
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は商用電源路を用いて信号の伝送を行う
商用電源重畳通信装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a commercial power superimposed communication device that transmits signals using a commercial power line.
従来例の構成とその問題点
通信伝送に関する制御方法には、大別して２種
類の方式が存在する。そのひとつは集中型制御方
法で、新局が通信制御を管理し、子局は新局から
のデーター送出要求に従つて自局内のデーターを
新局の管理のもとで伝送する方法である。もうひ
とつのものは分散型制御方法で、通信制御の管理
機能は各局が分散して持つており、通信の要求が
発生すると相手局との通信の確立を行つた後、信
号を伝送する方法である。Conventional configuration and its problems There are two main types of control methods regarding communication transmission. One of these is a centralized control method, in which the new station manages communication control, and the slave stations transmit their own data under the control of the new station in accordance with data transmission requests from the new station. The other method is a distributed control method, in which each station has a distributed management function for communication control, and when a communication request occurs, communication is established with the other station, and then the signal is transmitted. be.
さて従来商用電路を用いた信号伝送については
前者の制御方式のものしかなく、したがつて子局
が増加するに従つて新局の伝送制御に関する手順
を変更したり、設定を変えたりする操作が必要と
なつていた。また集中型制御方法によつて通信制
御を行うと、新局が故障すると通信機能が停止し
てしまうことになる。これは信頼性を要求される
システムの通信制御方式としては問題を残してい
ることを意味する。さらには、子局のデーターを
別の子局に伝える場合、その中間に必ず新局が介
在することになりその分だけ回線の専有時間が長
くなり、スループツトも低下するといつた欠点が
あつた。 Conventionally, only the former control method has been available for signal transmission using commercial power lines, and therefore, as the number of slave stations increases, it is difficult to change procedures or settings related to transmission control for new stations. It had become necessary. Furthermore, if communication control is performed using a centralized control method, if a new station breaks down, the communication function will stop. This means that problems remain as a communication control method for systems that require reliability. Furthermore, when transmitting data from a slave station to another slave station, a new station must be interposed between the two stations, which lengthens the line's exclusive use time and reduces throughput.
発明の目的
本発明は上記欠点に鑑み、分散型制御方法を用
い、新局、子局といつた制御ではなく、各局が対
等に相互間の通信制御を行うことにより、一局の
故障により生じる回線全体の不通を防止すること
ともに、通信媒体としての回線の有効利用により
局の増減についても自由度が大きく、さらには信
頼性の高い商用電源重畳通信装置を提供すること
を目的とする。Purpose of the Invention In view of the above-mentioned drawbacks, the present invention uses a distributed control method, and instead of controlling new stations and slave stations, each station equally controls communication between each other. It is an object of the present invention to provide a highly reliable commercial power superimposed communication device that prevents interruption of the entire line, has a high degree of freedom in increasing or decreasing the number of stations by effectively utilizing the line as a communication medium, and has high reliability.
発明の構成
本発明は上記目的を達するため、商用電源波形
に信号を重畳する際、又は重畳している波形から
情報の種類を判別する際、商用電源信号を同期信
号とする同期制御信号生成手段を設けることによ
り、時間的な同期を取るとともに、回線の無信号
時間をこの同期周期単位で検出し、情報の種類に
応じた無信号時間の確認後情報が送出されるよう
情報信号の制御を行うようにしたものである。Structure of the Invention In order to achieve the above object, the present invention provides a synchronization control signal generating means that uses a commercial power supply signal as a synchronization signal when superimposing a signal on a commercial power supply waveform or determining the type of information from a superimposed waveform. By providing time synchronization, the system detects the no-signal time on the line in units of this synchronization cycle, and controls the information signal so that the information is sent after confirming the no-signal time according to the type of information. This is what I decided to do.
実施例の説明
以下、図面を参照しながら本発明の一実施例に
ついて説明する。DESCRIPTION OF EMBODIMENTS 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における商用電源重
畳通信装置のブロツク図である。 FIG. 1 is a block diagram of a commercial power superimposed communication device according to an embodiment of the present invention.
同図において、１は商用の電力が送出されてい
る商用電源線、２は商用電源波形から情報信号を
入力するとともに、商用電源波形に情報信号を重
畳するトランス、３はトランス２が入力した入力
情報信号を増幅する入力信号増幅回路、４は商用
電源波形に重畳される出力情報信号を増幅する出
力信号増幅回路、５は入力信号増幅回路３から情
報を入力するとともに、出力信号増幅回路４に情
報を出力して各種の情報処理を行う通信制御回
路、６は電源波形信号を検出して後述の同期制御
を行なう電源同期信号検出回路である。 In the figure, 1 is a commercial power line through which commercial power is transmitted, 2 is a transformer that inputs information signals from the commercial power waveform and superimposes the information signals on the commercial power waveform, and 3 is the input input by transformer 2. An input signal amplification circuit for amplifying an information signal; 4 an output signal amplification circuit for amplifying an output information signal superimposed on a commercial power supply waveform; A communication control circuit outputs information and performs various information processing, and 6 is a power synchronization signal detection circuit that detects a power waveform signal and performs synchronization control to be described later.
以下、第２図の信号波形図を参照しながら上記
装置の動作を説明する。 The operation of the above device will be described below with reference to the signal waveform diagram in FIG.
なお第２図において、ａは商用電源線１上の波
形信号、ｂは電源同期信号検出回路６によつて検
出整形された同期信号、ｃは通信制御回路５によ
つて制御された出力波形信号、c′は他局の通信制
御回路の出力波形信号、ｄは入力信号増幅回路３
によつて増幅された波形信号である。 In FIG. 2, a is a waveform signal on the commercial power line 1, b is a synchronization signal detected and shaped by the power synchronization signal detection circuit 6, and c is an output waveform signal controlled by the communication control circuit 5. , c' is the output waveform signal of the communication control circuit of the other station, and d is the input signal amplification circuit 3.
This is a waveform signal amplified by .
さて商用電源線１には常時100Vの交流信号が
存在して、必要に応じて第２図ａに示すように商
用電源重畳通信による高周波信号が重畳されてい
るものとする。まず情報信号の送出について説明
すると、商用電源線１に重畳された２種類の信号
から電源同期信号検出回路６によつて電源周波数
に同期した同期信号ｂが作り出される。同期信号
ｂは通信制御回路５に印加され、この同期信号ｂ
を基準にして情報信号を出力し、出力信号増幅回
路４で十分に増幅された情報信号ｃはトランス２
を経て商用電源線１に出力される。ここで第２図
の時間t1のタイミングで出力されているのがデー
ターパケツトである。一方、商用電源線１上の情
報信号は入力信号増幅回路３で増幅された後第２
図ｄに示すように通信制御回路５に再び加えられ
る。入力信号増幅回路３は、商用電源線１上の全
ての情報を入力信号として増幅するから信号ｄに
示す様に自局の送信信号以外の信号も検出する。 Now, it is assumed that an AC signal of 100 V is always present on the commercial power line 1, and a high frequency signal by commercial power superimposed communication is superimposed as necessary, as shown in FIG. 2a. First, the transmission of the information signal will be explained. From two types of signals superimposed on the commercial power line 1, the power synchronization signal detection circuit 6 generates a synchronization signal b synchronized with the power supply frequency. The synchronizing signal b is applied to the communication control circuit 5, and this synchronizing signal b
An information signal c is output based on the information signal c, and the information signal c sufficiently amplified by the output signal amplification circuit 4 is sent to the transformer 2.
It is output to the commercial power line 1 through the. Here, what is output at the timing of time t1 in FIG. 2 is a data packet. On the other hand, the information signal on the commercial power line 1 is amplified by the input signal amplification circuit 3 and then
It is added again to the communication control circuit 5 as shown in Figure d. Since the input signal amplification circuit 3 amplifies all the information on the commercial power line 1 as input signals, it also detects signals other than the transmission signal of its own station, as shown by the signal d.
さて時間t1で相手局に本装置から送出した信号
を誤りなく受信した他局は商用電源周波数の半サ
イクル分の時間、すなわち時間t2で商用電源線１
上の無信号を検出した後、信号受信確認パケツト
（以下ACKパケツトと略す）を時間t3で送出す
る。データーパケツトの送出を行つた局は商用電
源線１上に時間t2で無信号を検出した後、ただち
に検出されたパケツトはACKパケツトとして処
理を行う。 Now, at time t 1 , the other station that has received the signal sent from this device to the other station without error receives the signal from the commercial power line 1 at time t 2 , which is a half cycle of the commercial power frequency.
After detecting the above no signal, a signal reception confirmation packet (hereinafter abbreviated as ACK packet) is sent out at time t3 . After the station that transmitted the data packet detects no signal on the commercial power line 1 at time t2 , the detected packet is immediately processed as an ACK packet.
すなわち送信を開始した局は以下の手順で一連
の送信サイクルを終える。 That is, the station that has started transmission completes a series of transmission cycles in the following steps.
送信（データーパケツトの送信）→時間待
ち（商用電源周波数の半サイクル分の時間待ち）
→ACKパケツトの受信。 Transmission (sending data packets) → Waiting for time (waiting for half a cycle of the commercial power frequency)
→Receive ACK packet.
一方、相手局（受信局）は以下の手順で一連の
受信サイクルを終える。 On the other hand, the other station (receiving station) completes a series of reception cycles using the following procedure.
受信（データーパケツトの受信）→アドレ
スの照合→時間待ち（商用電源周波数の半サイ
クル分の時間待ち）→ACKパケツトの送信。 Reception (receiving data packet) → Verification of address → Waiting for time (waiting for half a cycle of commercial power frequency) → Sending ACK packet.
そしてデーターパケツトの送信に関しては、商
用電源線１上に商用電源周波数の１サイクル分の
無信号時間、時間t4を検出した後、データーパケ
ツトの送信を行う。 Regarding the transmission of data packets, after detecting a no-signal time of one cycle of the commercial power frequency, time t4 , on the commercial power line 1, the data packets are transmitted.
以上のように本実施例によれば、商用電源に同
期するよう、通信制御回路５は電源同期信号検出
回路６により制御され時間管理を行い、データー
パケツトの送信、ACKパケツトなどの情報の種
類に応じた所定の無信号時間を確認後に各局が情
報の送信を行うことにより、各局の同期をきわめ
て簡単に取れるとともに通信媒体としての商用電
源線１の有効活用ができる。 As described above, according to the present embodiment, the communication control circuit 5 is controlled by the power supply synchronization signal detection circuit 6 to manage time so as to be synchronized with the commercial power supply, and the communication control circuit 5 manages the time by controlling the transmission of data packets, the type of information such as ACK packets, etc. By having each station transmit information after confirming a predetermined no-signal time corresponding to the signal, it is possible to synchronize each station very easily and to effectively utilize the commercial power line 1 as a communication medium.
なお本実施例では信号重畳のコーデイング方法
に電源同期信号を基準としたフエーズエンコーデ
イング方式を採用している。このフエーズエンコ
ーデイング方式は電源同期信号と高周波信号と位
相関係で信号の状態を決めているため、各局の信
号検出もきわめて容易に行うことができ、特別な
同期手段を必要としない点でも優れている。 In this embodiment, a phase encoding method based on a power synchronization signal is adopted as a signal superimposition coding method. This phase encoding method determines the signal state based on the phase relationship between the power supply synchronization signal and the high-frequency signal, so it is extremely easy to detect signals at each station, and it is also superior in that it does not require any special synchronization means. ing.
発明の効果
以上のように本発明は商用電源形から同期制御
信号を得る同期制御生成手段を設け、入出力情報
の種類に応じて無信号時間を確認後、情報の入出
力操作を行う通信制御手段に前期同期制御信号を
与え、各局で分散制御を行うことにより、一局の
故障により回線全体が不通になることを防止する
とともに、通信媒体の有効利用が可能となり局の
増減にも自由度を与え、さらには確実な同期によ
り信頼世を高めることができ、その効果は大なる
ものである。Effects of the Invention As described above, the present invention provides a synchronous control generation means that obtains a synchronous control signal from a commercial power source, and after checking the no-signal time according to the type of input/output information, the communication control performs the input/output operation of information. By giving a pre-synchronization control signal to the means and performing distributed control at each station, it is possible to prevent the entire line from being cut off due to a failure in one station, and it is also possible to use the communication medium effectively, allowing flexibility in increasing or decreasing the number of stations. In addition, the reliable synchronization can be improved, and the effect is great.
第１図は本発明の一実施例における商用電源重
畳通信装置のブロツク図、第２図は同タイミング
チヤートである。
２……トランス、５……通信制御回路、６……
電源同期信号検出回路。
FIG. 1 is a block diagram of a commercial power superimposed communication device according to an embodiment of the present invention, and FIG. 2 is a timing chart of the same. 2...Transformer, 5...Communication control circuit, 6...
Power supply synchronization signal detection circuit.
Claims (1)
るとともに、前記商用電源波形に情報を重畳させ
る入力出力手段と、前記商用電源から同期制御信
号を得る同期制御信号生々手段と、前記同期制御
信号生々手段が得た同期制御信号を基にして、前
記入力出力手段が入力した情報の種類を判別する
とともに、前記入力出力手段を介して前記商用電
源波形に重畳させる情報の送出タイミングを得る
通信制御手段を具備し、前記通信制御手段が、つ
ぎに送出する情報の種類に応じて、受信終了時か
ら、前記同期制御信号の周期を一単位とする所定
の無信号時間の確認後を、前記つぎに送出する情
報の送出タイミングとする分散型の商用電源重畳
通信装置。 ２ 通信制御手段が、最優先の情報の送出タイミ
ングの最短の無信号時間の確認後とする特許請求
の範囲第１項記載の分散型の商用電源重畳通信装
置。[Scope of Claims] 1. Input/output means for inputting information superimposed on a commercial power supply waveform and superimposing the information on the commercial power supply waveform; and synchronous control signal generation means for obtaining a synchronous control signal from the commercial power supply. , based on the synchronous control signal obtained by the synchronous control signal generating means, the input/output means determines the type of information input, and sends information to be superimposed on the commercial power supply waveform via the input/output means. The communication control means includes a communication control means for obtaining timing, and the communication control means confirms a predetermined no-signal time from the end of reception, with the period of the synchronization control signal as one unit, depending on the type of information to be sent next. A distributed commercial power supply superimposed communication device in which the transmission timing of the next information to be transmitted is set at a later time. 2. The distributed commercial power superimposed communication device according to claim 1, wherein the communication control means transmits the highest priority information after confirming the shortest no-signal time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18642882A JPS5975724A (en) | 1982-10-22 | 1982-10-22 | Commercial power source superimposed communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18642882A JPS5975724A (en) | 1982-10-22 | 1982-10-22 | Commercial power source superimposed communication device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5975724A JPS5975724A (en) | 1984-04-28 |
| JPH0532930B2 true JPH0532930B2 (en) | 1993-05-18 |
Family
ID=16188251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18642882A Granted JPS5975724A (en) | 1982-10-22 | 1982-10-22 | Commercial power source superimposed communication device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5975724A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2580211B2 (en) * | 1987-11-24 | 1997-02-12 | キヤノン株式会社 | Communication device |
| JP4889968B2 (en) * | 2005-07-05 | 2012-03-07 | ソニー株式会社 | Power line carrier communication system, power line carrier communication method, and communication device |
| JP4889971B2 (en) * | 2005-07-21 | 2012-03-07 | ソニー株式会社 | Power line carrier communication system, communication method, communication apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710539A (en) * | 1980-06-23 | 1982-01-20 | Matsushita Electric Ind Co Ltd | Bidirectional signal transmitter of distribution line carrier system |
-
1982
- 1982-10-22 JP JP18642882A patent/JPS5975724A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5710539A (en) * | 1980-06-23 | 1982-01-20 | Matsushita Electric Ind Co Ltd | Bidirectional signal transmitter of distribution line carrier system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5975724A (en) | 1984-04-28 |
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