JP4692182B2 - Installation location confirmation system - Google Patents

Installation location confirmation system Download PDF

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JP4692182B2
JP4692182B2 JP2005277014A JP2005277014A JP4692182B2 JP 4692182 B2 JP4692182 B2 JP 4692182B2 JP 2005277014 A JP2005277014 A JP 2005277014A JP 2005277014 A JP2005277014 A JP 2005277014A JP 4692182 B2 JP4692182 B2 JP 4692182B2
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power line
line communication
communication modem
modem device
installation location
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JP2007088956A (en
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治久 坂田
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KDDI Corp
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Description

本発明は、複数の電力線通信通信（ＰＬＣ）モデム装置の設置場所を確認する設置場所確認システムに関する。 The present invention relates to an installation location confirmation system for confirming installation locations of a plurality of power line communication (PLC) modem devices.

従来の電力線通信（ＰＬＣ）における端末の位置管理システムとしては、無線チップが装着された家電品を管理サーバで管理する方法がある（特許文献１参照）。またコンセントにおけるセキュリティシステムとして、コンセント側でハウスコードを電力線に重畳して送信する構成が特許文献２に記載され、アダプタに識別情報の送信機能を持たせた構成が特許文献３に記載されている。
特開２００４−０５６４３５号公報 特開２００３−０７８４５６号公報 特開２００３−０７８４５８号公報 As a terminal position management system in conventional power line communication (PLC), there is a method of managing home appliances equipped with wireless chips with a management server (see Patent Document 1). Further, as a security system in an outlet, a configuration in which a house code is superimposed on a power line and transmitted on the outlet side is described in Patent Document 2, and a configuration in which an adapter has a function of transmitting identification information is described in Patent Document 3. .
JP 2004-056435 A Japanese Patent Application Laid-Open No. 2003-078356 JP 2003-078458 A

教室、オフィス、店舗、会議場などにおいてコンピュータ端末等を電力線通信モデムに接続して使用する場合、限定された場所、例えば同一室内の端末にのみ、特定のサービスを提供したいことがある。そのためには、端末が同一室内に存在しているかどうかを簡易に判別できる必要がある。   When a computer terminal or the like is connected to a power line communication modem in a classroom, office, store, conference hall, etc., it may be desired to provide a specific service only to a limited place, for example, a terminal in the same room. For this purpose, it is necessary to be able to easily determine whether or not the terminal exists in the same room.

さらに、通信の秘匿性や帯域確保の点からも、端末の位置が確認できることで、きめの細かいサービスが可能となる。   Furthermore, in terms of communication secrecy and bandwidth securing, the location of the terminal can be confirmed, so that detailed services can be provided.

端末の絶対的な位置を知る手段としてＧＰＳがあるが、ＧＰＳは、基本的に屋内では使用できない。また、どの端末が同一室内に設置されているかは、ＧＰＳでは判明しない。   There is GPS as a means of knowing the absolute position of the terminal, but GPS cannot be used indoors basically. Also, GPS cannot determine which terminal is installed in the same room.

本発明は、物理的に近くにあることを簡易に確認できる設置場所確認システムを提示することを目的とする。 An object of this invention is to show the installation location confirmation system which can confirm easily that it is physically close.

本発明に係る設置場所確認システムは、第１の電力線通信モデム装置の設置場所を第２の電力線通信モデム装置が確認する設置場所確認システムであって、当該第１の電力線通信モデム装置が、当該第１の電力線通信モデム装置の設置場所を示す情報を記憶する第１の記憶手段と、当該第１の電力線通信モデム装置の設置場所を示す情報と識別信号を無線信号に載せて出力する無線信号送信装置を具備し、当該第２の電力線通信モデム装置が、当該第２の電力線通信モデム装置の設置場所を示す情報を記憶する第２の記憶手段と、当該無線信号送信装置から出力される当該無線信号を受信する無線信号受信装置と、当該無線信号で搬送される当該第１の電力線通信モデム装置の当該設置場所と、当該第２の電力線通信モデム装置の設置場所を対比する制御回路とを具備することを特徴とする。 An installation location confirmation system according to the present invention is an installation location confirmation system in which a second power line communication modem device confirms an installation location of a first power line communication modem device, wherein the first power line communication modem device A first storage means for storing information indicating the installation location of the first power line communication modem device; and a radio signal for outputting information indicating the installation location of the first power line communication modem device and an identification signal on the radio signal A transmission device, wherein the second power line communication modem device stores second storage means for storing information indicating an installation location of the second power line communication modem device, and the wireless signal transmission device outputs the information a radio signal receiving apparatus for receiving a radio signal, and the location of the first power line communication modem device carried by the radio signals, the location of the second power line communication modem device Characterized by comprising a Hisuru control circuit.

本発明に係る設置場所確認システムは、第１の電力線通信モデム装置の設置場所を第２の電力線通信モデム装置が確認する設置場所確認システムであって、当該第１の電力線通信モデム装置が、当該第１の電力線通信モデム装置の設置場所を示す情報を記憶する第１の記憶手段と、第１の無線信号を出力する第１の無線信号送信装置と、当該第２の電力線通信モデム装置からの第２の無線信号を受信する第１の無線信号受信装置とを具備し、当該第２の電力線通信モデム装置が、当該第２の電力線通信モデム装置の設置場所を示す情報を記憶する第２の記憶手段と、当該第１の無線信号を受信する第２の無線信号受信装置と、当該第２の無線信号を送信する第２の無線信号送信装置とを具備し、当該第１の電力線通信モデム装置が、当該第１の無線信号で当該第１の電力線通信モデム装置の設置場所を示す情報と識別信号を当該第２の電力線通信モデム装置に送信し、当該第２の電力線通信モデム装置が、当該第１の無線信号で搬送される当該第１の電力線通信モデム装置の当該設置場所と当該第２の電力線通信モデム装置の設置場所を対比し、その対比結果を当該第２の無線信号で当該第１の電力線通信モデム装置に送信することを特徴とする。 Location confirmation system according to the present invention, the location of the first power line communication modem device a location confirmation system in which the second power line communication modem apparatus is confirmed, the first power line communication modem device, the First storage means for storing information indicating the installation location of the first power line communication modem device, a first wireless signal transmission device for outputting a first wireless signal, and a second power line communication modem device from the second power line communication modem device A second wireless signal receiving device that receives the second wireless signal, and the second power line communication modem device stores information indicating an installation location of the second power line communication modem device. A first power line communication modem, comprising: storage means; a second wireless signal receiving device that receives the first wireless signal; and a second wireless signal transmitting device that transmits the second wireless signal. The device is the first Information indicating an installation location of the first power line communication modem device and an identification signal are transmitted to the second power line communication modem device by a wireless signal, and the second power line communication modem device transmits the first wireless signal by the first wireless signal. The installation location of the first power line communication modem device to be conveyed is compared with the installation location of the second power line communication modem device , and the comparison result is used as the second wireless signal to compare the first power line communication modem device. It is characterized by transmitting to.

本発明によれば、第１及び第２の電力線通信モデム装置が物理的に近くに位置することを容易に確認でき、その結果として、設置場所の管理が容易になる。   According to the present invention, it is possible to easily confirm that the first and second power line communication modem devices are physically close to each other, and as a result, management of the installation location is facilitated.

以下、図面を参照して、本発明の実施例を詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１は、本発明の第１実施例の概略構成ブロック図を示す。本実施例では、発光素子を有するＰＬＣモデム装置と、受光素子を具備するＰＬＣモデム装置を対で使用する。   FIG. 1 shows a schematic block diagram of a first embodiment of the present invention. In this embodiment, a PLC modem apparatus having a light emitting element and a PLC modem apparatus having a light receiving element are used in pairs.

建物内の電力線１０にコンセント１２，１４，１６が接続する。コンセント１２，１４は同一室内にある。   Outlets 12, 14, and 16 are connected to the power line 10 in the building. The outlets 12 and 14 are in the same room.

ＰＬＣモデム装置２０は、ＰＬＣモデム回路２２、制御回路２４、メモリ２６及び広出射角の発光素子２８を具備する。電源プラグ３０は、ＰＬＣ信号を重畳される電力線３２を介してＰＬＣモデム回路２２に接続する。ＰＬＣモデム回路２２はまた、電力線３４及び信号線３６を介して、通信端末となる電気機器３８と接続する。電源プラグ３０はコンセント１２に接続される。電力線１０上の電力は、コンセント１２、電源プラグ３０、電力線３２を介してモデム装置２０に供給され、更に、ＰＬＣモデム回路２２及び電力線３４を介して電気機器３８に供給される。ＰＬＣモデム装置２０は電気機器３８に内蔵されることもある。   The PLC modem device 20 includes a PLC modem circuit 22, a control circuit 24, a memory 26, and a light emitting element 28 having a wide emission angle. The power plug 30 is connected to the PLC modem circuit 22 via the power line 32 on which the PLC signal is superimposed. The PLC modem circuit 22 is also connected to an electric device 38 serving as a communication terminal via a power line 34 and a signal line 36. The power plug 30 is connected to the outlet 12. The power on the power line 10 is supplied to the modem device 20 through the outlet 12, the power plug 30, and the power line 32, and is further supplied to the electrical device 38 through the PLC modem circuit 22 and the power line 34. The PLC modem device 20 may be built in the electric device 38.

同様に、ＰＬＣモデム装置４０は、ＰＬＣモデム回路４２、制御回路４４、メモリ４６及び受光素子４８を具備する。電源プラグ５０は、ＰＬＣ信号を重畳される電力線５２を介してＰＬＣモデム回路４２に接続する。ＰＬＣモデム回路４２はまた、電力線５４及び信号線５６を介して、通信端末となる電気機器５８と接続する。電源プラグ５０はコンセント１４に接続される。電力線１０上の電力は、コンセント１４、電源プラグ５０及び電力線５２を介してＰＬＣモデム装置４０に供給され、更に、ＰＬＣモデム回路４２及び電力線５４を介して電気機器５８に供給される。ＰＬＣモデム装置４０は電気機器５８に内蔵されることもある。   Similarly, the PLC modem device 40 includes a PLC modem circuit 42, a control circuit 44, a memory 46 and a light receiving element 48. The power plug 50 is connected to the PLC modem circuit 42 via the power line 52 on which the PLC signal is superimposed. The PLC modem circuit 42 is also connected to an electrical device 58 serving as a communication terminal via a power line 54 and a signal line 56. The power plug 50 is connected to the outlet 14. The power on the power line 10 is supplied to the PLC modem device 40 through the outlet 14, the power plug 50, and the power line 52, and further supplied to the electrical equipment 58 through the PLC modem circuit 42 and the power line 54. The PLC modem device 40 may be built in the electric device 58.

コンセント１６には、ＰＬＣモデム装置６２の電源プラグ６０が接続される。ＰＬＣモデム装置６２はまた、電力線６４及び信号線６６を介して管理サーバ６８に接続する。管理サーバ６８は、ＰＬＣモデム装置６２及び途中の電力線１０，３２，５２により、ＰＬＣモデム装置２０，４０と通信することができる。   A power plug 60 of the PLC modem device 62 is connected to the outlet 16. The PLC modem device 62 is also connected to the management server 68 via the power line 64 and the signal line 66. The management server 68 can communicate with the PLC modem devices 20 and 40 through the PLC modem device 62 and the power lines 10, 32, and 52 on the way.

本実施例では、メモリ２６には、ＰＬＣモデム装置２０又は電気機器３８の設置場所を示す情報が予め書き込まれ、メモリ４６には、ＰＬＣモデム装置４０又は電気機器５８の設置場所を示す情報が予め書き込まれる。   In this embodiment, information indicating the installation location of the PLC modem device 20 or the electric device 38 is written in the memory 26 in advance, and information indicating the installation location of the PLC modem device 40 or the electric device 58 is stored in the memory 46 in advance. Written.

電源プラグ３０をコンセント１２に接続して、ＰＬＣモデム装置２０が給電された状態では、制御回路２４は、メモリ２６から設置場所を示す位置情報を読み出し、位置情報とＰＬＣモデム装置２０の識別情報を発光素子２８から光信号として出力させる。他方、電源プラグ５０をコンセント１４に接続して、ＰＬＣモデム装置４０が給電された状態では、制御回路４４は、受光素子５８に入力する光信号を待機し続ける。 In a state where the power plug 30 is connected to the outlet 12 and the PLC modem device 20 is supplied with power, the control circuit 24 reads the position information indicating the installation location from the memory 26 and obtains the position information and the identification information of the PLC modem device 20. The light emitting element 28 outputs the light signal. On the other hand, in a state where the power plug 50 is connected to the outlet 14 and the PLC modem device 40 is supplied with power, the control circuit 44 continues to wait for an optical signal input to the light receiving element 58.

ＰＬＣモデム装置２０の発光素子２８から出力される光信号を受光素子４８が受光できるように、ＰＬＣモデム装置４０をＰＬＣモデム装置２０の近傍に置く。これにより、ＰＬＣモデム装置４０の受光素子４８は、ＰＬＣモデム装置２０の発光素子２８から出力される光信号を受光して、電気信号に変換し、その電気信号を制御回路４４に供給する。制御回路４４は、受光素子４８からの電気信号から、ＰＬＣモデム装置２０の本来の設置場所と識別情報を知ることができる。   The PLC modem device 40 is placed in the vicinity of the PLC modem device 20 so that the light receiving element 48 can receive the optical signal output from the light emitting element 28 of the PLC modem device 20. As a result, the light receiving element 48 of the PLC modem device 40 receives the optical signal output from the light emitting element 28 of the PLC modem device 20, converts it into an electrical signal, and supplies the electrical signal to the control circuit 44. The control circuit 44 can know the original installation location and identification information of the PLC modem device 20 from the electrical signal from the light receiving element 48.

制御回路４４は、ＰＬＣモデム装置２０の位置情報と、メモリ４６に記憶される位置情報とを対比し、ＰＬＣモデム装置２０，４０が同じ場所に設置されるべきものであったか否かを判断する。同じ場所に設置されるべきものと判断した場合、ＰＬＣモデム装置２０は、ＰＬＣモデム装置２０，４０が確かに同じ場所、例えば同一室内にあることを管理サーバ６８に通知する。 The control circuit 44 compares the position information of the PLC modem device 20 with the position information stored in the memory 46, and determines whether or not the PLC modem devices 20 and 40 should be installed at the same place. If it is determined that they should be installed in the same place, the PLC modem device 20 notifies the management server 68 that the PLC modem devices 20 and 40 are indeed in the same place, for example, the same room.

このようにして、管理サーバ６８は、ＰＬＣモデム装置２０，４０が確かに同じ場所にあることを確認できる。これにより、例えば、同一室内の通信端末間の通信を許可したり、同一室内の通信端末に同じデータを送信するといった細かい通信制御が可能になる。また、本来同一室内にあるべきでないＰＬＣモデム装置を検出することも可能になり、ひいては、そのようなＰＬＣモデム装置を電力線通信ネットワークから除外することも可能になる。   In this way, the management server 68 can confirm that the PLC modem devices 20 and 40 are surely in the same place. Thereby, for example, fine communication control such as allowing communication between communication terminals in the same room or transmitting the same data to communication terminals in the same room becomes possible. Also, it is possible to detect a PLC modem device that should not be in the same room, and it is possible to exclude such a PLC modem device from the power line communication network.

図２は、本発明の第２実施例の概略構成ブロック図を示す。本実施例では、ＰＬＣモデム装置２０ａが、発光素子２８だけでなく、受光素子２９を具備し、ＰＬＣモデム装置４０ａが、受光素子４８だけでなく、発光素子４９を有する点が異なる。   FIG. 2 shows a schematic block diagram of the second embodiment of the present invention. The present embodiment is different in that the PLC modem device 20a includes not only the light emitting element 28 but also the light receiving element 29, and the PLC modem device 40a includes not only the light receiving element 48 but also the light emitting element 49.

制御回路４４ａは、発光素子４９を発光させることで所望の信号、例えば、受光素子４８で受光した位置情報とメモリ４６に記憶される位置情報の比較結果と、自己の識別情報をＰＬＣモデム装置２０ａに送信できる。発光素子４９から出力される光信号は、受光素子２９で電気信号に変換され、制御回路２４ａに入力する。   The control circuit 44a emits the light emitting element 49 to emit a desired signal, for example, the comparison result of the position information received by the light receiving element 48 and the position information stored in the memory 46, and its own identification information, the PLC modem device 20a. Can be sent to. The optical signal output from the light emitting element 49 is converted into an electric signal by the light receiving element 29 and input to the control circuit 24a.

この構成では、ＰＬＣモデム装置２０ａ，４０ａは、双方向で光信号により通信することができる。制御回路２４ａ，４４ａは何れも、相手のＰＬＣモデム装置４０ａ，２０ａが同一室内にあるべきものか否かを確認できる。ＰＬＣモデム装置４０ａ，２０ａの両方又は何れか一方が、確認結果を管理サーバ６８に送信する。   In this configuration, the PLC modem devices 20a and 40a can communicate by optical signals in both directions. Each of the control circuits 24a and 44a can confirm whether or not the partner PLC modem device 40a or 20a should be in the same room. Either or one of the PLC modem devices 40a and 20a transmits the confirmation result to the management server 68.

ＰＬＣモデム装置２０，４０間の通信に光空間伝送を使用したが、電波信号又は音響信号でもよいことは勿論である。勿論、そのような電波信号又は音響信号の強度は、同一室内のような近距離内に到達できる程度の微弱なものとする。   Although optical space transmission is used for communication between the PLC modem devices 20 and 40, it is needless to say that radio wave signals or acoustic signals may be used. Of course, the intensity of such a radio wave signal or sound signal is weak enough to reach a short distance such as in the same room.

特定の説明用の実施例を参照して本発明を説明したが、特許請求の範囲に規定される本発明の技術的範囲を逸脱しないで、上述の実施例に種々の変更・修整を施しうることは、本発明の属する分野の技術者にとって自明であり、このような変更・修整も本発明の技術的範囲に含まれる。   Although the invention has been described with reference to specific illustrative embodiments, various modifications and alterations may be made to the above-described embodiments without departing from the scope of the invention as defined in the claims. This is obvious to an engineer in the field to which the present invention belongs, and such changes and modifications are also included in the technical scope of the present invention.

本発明の第１実施例の概略構成ブロック図を示す。1 shows a schematic block diagram of a first embodiment of the present invention. 本発明の第２実施例の概略構成ブロック図を示す。The schematic block diagram of 2nd Example of this invention is shown.

符号の説明Explanation of symbols

１０：電力線
１２，１４，１６：コンセント
２０，２０ａ：ＰＬＣモデム装置
２２：ＰＬＣモデム回路
２４，２４ａ：制御回路
２６：メモリ
２８：発光素子
２９；受光素子
３０：電源プラグ
３２：電力線
３４：電力線
３６：信号線
３８：電気機器
４０，４０ａ：ＰＬＣモデム装置
４２：ＰＬＣモデム回路
４４，４４ａ：制御回路
４６：メモリ
４８：受光素子
４９：発光素子
５０：電源プラグ
５２：電力線
５４：電力線
５６：信号線
５８：電気機器
６０：電源プラグ
６２：ＰＬＣモデム装置
６４：電力線
６６：信号線
６８：管理サーバ 10: power line 12, 14, 16: outlet 20, 20a: PLC modem device 22: PLC modem circuit 24, 24a: control circuit 26: memory 28: light emitting element 29; light receiving element 30: power plug 32: power line 34: power line 36 : Signal line 38: electrical equipment 40, 40a: PLC modem device 42: PLC modem circuit 44, 44a: control circuit 46: memory 48: light receiving element 49: light emitting element 50: power plug 52: power line 54: power line 56: signal line 58: Electrical equipment 60: Power plug 62: PLC modem device 64: Power line 66: Signal line 68: Management server

Claims (4)

第１の電力線通信モデム装置（２０）の設置場所を第２の電力線通信モデム装置（４０）が確認する設置場所確認システムであって、
当該第１の電力線通信モデム装置（２０）が、当該第１の電力線通信モデム装置（２０）の設置場所を示す情報を記憶する第１の記憶手段（２６）と、当該第１の電力線通信モデム装置の設置場所を示す情報と識別信号を無線信号に載せて出力する無線信号送信装置（２８）を具備し、
当該第２の電力線通信モデム装置（４０）が、当該第２の電力線通信モデム装置（４０）の設置場所を示す情報を記憶する第２の記憶手段（４６）と、当該無線信号送信装置（２８）から出力される当該無線信号を受信する無線信号受信装置（４８）と、当該無線信号で搬送される当該第１の電力線通信モデム装置（２０）の当該設置場所と、当該第２の電力線通信モデム装置（４０）の設置場所を対比する制御回路（４４）とを具備する
ことを特徴とする設置場所確認システム。 An installation location confirmation system in which the second power line communication modem device (40) confirms the installation location of the first power line communication modem device (20),
The first power line communication modem device (20) stores a first storage means (26) for storing information indicating an installation location of the first power line communication modem device (20), and the first power line communication modem. A wireless signal transmitting device (28) for outputting information indicating an installation location of the device and an identification signal on the wireless signal and outputting the wireless signal;
The second power line communication modem device (40) stores second storage means (46) for storing information indicating the installation location of the second power line communication modem device (40), and the radio signal transmission device (28). ) Receiving the wireless signal output from the wireless signal receiving device (48), the installation location of the first power line communication modem device (20) carried by the wireless signal, and the second power line communication. And a control circuit (44) for comparing the installation location of the modem device (40). 第１の電力線通信モデム装置（２０ａ）の設置場所を第２の電力線通信モデム装置（４０ａ）が確認する設置場所確認システムであって、
当該第１の電力線通信モデム装置（２０ａ）が、当該第１の電力線通信モデム装置（２０）の設置場所を示す情報を記憶する第１の記憶手段（２６）と、第１の無線信号を出力する第１の無線信号送信装置（２８）と、当該第２の電力線通信モデム装置（４０ａ）からの第２の無線信号を受信する第１の無線信号受信装置（２９）とを具備し、
当該第２の電力線通信モデム装置（４０ａ）が、当該第２の電力線通信モデム装置（４０）の設置場所を示す情報を記憶する第２の記憶手段（４６）と、当該第１の無線信号を受信する第２の無線信号受信装置（４８）と、当該第２の無線信号を送信する第２の無線信号送信装置（４９）とを具備し、
当該第１の電力線通信モデム装置（２０ａ）が、当該第１の無線信号で当該第１の電力線通信モデム装置の設置場所を示す情報と識別信号を当該第２の電力線通信モデム装置に送信し、
当該第２の電力線通信モデム装置（４０ａ）が、当該第１の無線信号で搬送される当該第１の電力線通信モデム装置（２０）の当該設置場所と当該第２の電力線通信モデム装置（４０）の設置場所を対比し、その対比結果を当該第２の無線信号で当該第１の電力線通信モデム装置（２０ａ）に送信する
ことを特徴とする設置場所確認システム。 An installation location confirmation system for confirming an installation location of a first power line communication modem device (20a ) by a second power line communication modem device (40a ) ,
The first power line communication modem device (20a) outputs a first storage unit (26) for storing information indicating an installation location of the first power line communication modem device (20) and a first radio signal. And a first wireless signal receiving device (29) for receiving a second wireless signal from the second power line communication modem device (40a),
The second power line communication modem device (40a) stores a second storage means (46) for storing information indicating an installation location of the second power line communication modem device (40), and the first radio signal. A second wireless signal receiving device (48) for receiving, and a second wireless signal transmitting device (49) for transmitting the second wireless signal,
The first power line communication modem device (20a) transmits information indicating the installation location of the first power line communication modem device and an identification signal to the second power line communication modem device using the first radio signal,
The installation place of the first power line communication modem device (20) and the second power line communication modem device (40) in which the second power line communication modem device (40a) is carried by the first radio signal. The installation location confirmation system characterized in that the installation location is compared and the comparison result is transmitted to the first power line communication modem device (20a) by the second radio signal. 当該無線信号が光信号、電波信号及び音響信号の何れかであることを特徴とする請求項１又は２に記載の設置場所確認システム。 The installation location confirmation system according to claim 1 or 2, wherein the wireless signal is one of an optical signal, a radio wave signal, and an acoustic signal. 更に、当該第２の電力線通信モデム装置から当該対比結果を受信して、当該第１及び第２の電力線通信モデムを介した通信を制御する管理サーバ（６８）を具備することを特徴とする請求項１、２又は３に記載の設置場所確認システム。  Furthermore, the management server (68) which receives the said comparison result from the said 2nd power line communication modem apparatus, and controls communication via the said 1st and 2nd power line communication modem is provided. Item 4. The installation location confirmation system according to item 1, 2 or 3.
JP2005277014A 2005-09-26 2005-09-26 Installation location confirmation system Expired - Fee Related JP4692182B2 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002300191A (en) * 2001-04-02 2002-10-11 Nippon Telegr & Teleph Corp <Ntt> Method for providing a plurality of service classes, its performance system, and its processing program and recording medium
JP2004064355A (en) * 2002-07-26 2004-02-26 Matsushita Electric Works Ltd Power line carrier communication system and attribute information setting method for terminal used for the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002300191A (en) * 2001-04-02 2002-10-11 Nippon Telegr & Teleph Corp <Ntt> Method for providing a plurality of service classes, its performance system, and its processing program and recording medium
JP2004064355A (en) * 2002-07-26 2004-02-26 Matsushita Electric Works Ltd Power line carrier communication system and attribute information setting method for terminal used for the same

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