JP2005184299A - Wireless lan system utilizing television antenna cable - Google Patents

Wireless lan system utilizing television antenna cable Download PDF

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JP2005184299A
JP2005184299A JP2003420539A JP2003420539A JP2005184299A JP 2005184299 A JP2005184299 A JP 2005184299A JP 2003420539 A JP2003420539 A JP 2003420539A JP 2003420539 A JP2003420539 A JP 2003420539A JP 2005184299 A JP2005184299 A JP 2005184299A
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wireless lan
room
antenna
television
access point
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Hideyuki Tanaka
秀幸 田中
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Kanda Tsushin Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a wireless LAN system configured of a wireless LAN access point performing transmission/reception of radio wave in a building partitioned by wall, or the like, and a wireless LAN terminal performing transmission/reception of radio wave in each room wherein the work for installing a dedicated cable is eliminated by utilizing a television antenna cable. <P>SOLUTION: The wireless LAN system configured of a wireless LAN access point performing transmission/reception of radio wave in a building partitioned by wall, or the like, and a wireless LAN terminal performing transmission/reception of radio wave in each room is provided with a relay antenna in close proximity to the wireless LAN access point connected with a television antenna cable installed in the building, and a relay antenna in each room connected with the television antenna cable. In the wireless LAN system, radio wave is transmitted/received between the wireless LAN access point and the wireless LAN terminal through the relay antenna in close proximity to the wireless LAN access point, the television antenna cable, and the relay antenna in each room. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、建物内において各部屋に設置した無線ＬＡＮ端末がテレビ用アンテナケーブルを介して、電波の送受信を行う無線ＬＡＮシステムに関する。   The present invention relates to a wireless LAN system in which a wireless LAN terminal installed in each room in a building transmits and receives radio waves via a television antenna cable.

一般住宅や事務所などの建物は、壁等によって各部屋を仕切っている。このような各部屋を仕切る壁等の材質や厚さなどによって通過する電波の減衰量が大きく異なるため、送信電力が小さい無線端末による壁越しの無線通信は確実性に問題があった。すでに設置されているテレビ用アンテナケーブルを用いることで、専用ケーブルの設置工事を行わず安易にテレビ用アンテナケーブルを介して電波の送受信を行う無線通信システムが知られている。   In buildings such as ordinary houses and offices, each room is partitioned by walls. Since the attenuation amount of the radio wave passing therethrough varies greatly depending on the material and thickness of the walls partitioning each room, wireless communication over the wall by the wireless terminal having low transmission power has a problem in reliability. There has been known a wireless communication system that uses a television antenna cable that has already been installed to easily transmit and receive radio waves via the television antenna cable without installing a dedicated cable.

従来例は、図２で示すような構成になっている。すなわち、図２で示すように、部屋Ｆと部屋Ｇからなる建物で、建物外にテレビ放送受信用アンテナ１が設置される。テレビ用アンテナ１はテレビ用増幅器２の入力側に接続される。テレビ用増幅器２の出力側は分配器４に接続され、分配器４を介しテレビ用アンテナケーブル３で各部屋に設置されたテレビ用端子５に接続されている。また部屋Ｆにおいては、テレビ用端子５に無線通信用の接続器６を接続し、無線通信用の接続器６には中継アンテナ７を接続する。この部屋Ｆには無線端末８を配置する。一方、部屋Ｇにおいては、テレビ用端子５にテレビ放送波と無線信号波とを分波する分波器９を接続し、分波器９にはテレビ受像機１０を接続する。一方、分波器９には無線通信用の接続器１１を接続し、この無線通信用の接続器１１には中継アンテナ１２を接続する。この部屋Ｇには無線端末１３を配置する。 The conventional example has a configuration as shown in FIG. That is, as shown in FIG. 2, in a building composed of a room F and a room G, the television broadcast receiving antenna 1 is installed outside the building. The television antenna 1 is connected to the input side of the television amplifier 2. The output side of the television amplifier 2 is connected to a distributor 4, and is connected via the distributor 4 to a television terminal 5 installed in each room by a television antenna cable 3. In the room F, a wireless communication connector 6 is connected to the TV terminal 5, and a relay antenna 7 is connected to the wireless communication connector 6. A wireless terminal 8 is placed in this room F. On the other hand, in the room G, a duplexer 9 for demultiplexing a television broadcast wave and a radio signal wave is connected to the television terminal 5, and a television receiver 10 is connected to the duplexer 9. On the other hand, a coupler 11 for wireless communication is connected to the duplexer 9, and a relay antenna 12 is connected to the coupler 11 for wireless communication. A wireless terminal 13 is placed in the room G.

これにより、無線端末８と無線端末１３とはテレビ用アンテナケーブルを介して電波の送受信を行うことで、壁等により仕切られることにより、電波が減衰することで無線通信が不可能な建物内でも、無線通信を行うことが出来る。
特開平８−１２５６００号公報 As a result, the wireless terminal 8 and the wireless terminal 13 transmit and receive radio waves via a television antenna cable, and are partitioned by a wall or the like, so that even in buildings where radio communication is not possible due to attenuation of radio waves. Wireless communication can be performed.
JP-A-8-125600

このような、テレビ用アンテナケーブルを使用する無線通信システムにおいて、テレビ用アンテナケーブルに無線通信用の接続器や中継装置を接続して、テレビ用アンテナケーブルを介して電波の送受信を行うため、無線通信システム用の特別な機器が必要であった。そのため、従来の無線ＬＡＮ機器はテレビ用アンテナケーブルを介して電波の送受信が行えない。そのため新たに専用線を配線する必要があった。 In such a wireless communication system using a television antenna cable, a radio communication connector or relay device is connected to the television antenna cable to transmit and receive radio waves via the television antenna cable. Special equipment for communication systems was required. For this reason, conventional wireless LAN devices cannot transmit and receive radio waves via a television antenna cable. Therefore, it was necessary to newly wire a dedicated line.

そこで本発明は、壁等に仕切られた、建物内で電波の送受信を行う無線ＬＡＮアクセスポイントと、各部屋で電波の送受信を行う無線ＬＡＮ端末とで構成される無線ＬＡＮシステムにおいて、建物内に設置されたテレビ用アンテナケーブルに接続された、無線ＬＡＮアクセスポイント近接の中継アンテナと、テレビ用アンテナケーブルに接続された、各部屋の中継アンテナを備えることで、無線ＬＡＮアクセスポイント近接の中継アンテナ、テレビ用アンテナケーブル、各部屋の中継アンテナを介して、無線ＬＡＮアクセスポイントと無線ＬＡＮ端末との間で電波の送受信を行うとした無線ＬＡＮシステム。   Accordingly, the present invention provides a wireless LAN system that includes a wireless LAN access point that transmits and receives radio waves in a building, and a wireless LAN terminal that transmits and receives radio waves in each room. A relay antenna near the wireless LAN access point connected to the installed TV antenna cable and a relay antenna near each wireless LAN access point connected to the TV antenna cable, A wireless LAN system in which radio waves are transmitted and received between a wireless LAN access point and a wireless LAN terminal via a television antenna cable and a relay antenna in each room.

本発明では、テレビ用アンテナケーブルに結合器、中継アンテナを用いることで既存の無線ＬＡＮ機器で建物内の各部屋で、無線ＬＡＮアクセスポイントと無線ＬＡＮ端末との間で電波の送受信を行うことを可能にしている。 In the present invention, a radio wave is transmitted and received between a wireless LAN access point and a wireless LAN terminal in each room in a building using an existing wireless LAN device by using a coupler and a relay antenna for a television antenna cable. It is possible.

壁等で仕切られた、建物内の各部屋間で無線ＬＡＮシステムを実現するために、従来のテレビ用アンテナケーブルに結合器、分波器、中継アンテナを追加するだけで実現した。   In order to realize a wireless LAN system between rooms in a building partitioned by walls, etc., it was realized simply by adding a coupler, duplexer, and relay antenna to the conventional antenna cable for television.

図１で示すように、部屋Ａ、部屋Ｂ、部屋Ｃ、部屋Ｄ、部屋Ｅからなる建物で、建物外にテレビ用アンテナ２４が設置される。テレビ放送受信用アンテナ２４はテレビ用増幅器２２の入力側に接続される。テレビ用増幅器２２の出力側は結合器２１の入力Ａに接続され、結合器２１の入力Ｂはテレビ用アンテナケーブル２０で部屋Ａのテレビ用端子５に接続される。結合器２１の出力側は分配器２３の入力側に接続される。分配器２３を介しテレビ用アンテナケーブル２０で部屋Ｂ、部屋Ｃ、部屋Ｄ、部屋Ｅに設置されたテレビ用端子５に接続される。   As shown in FIG. 1, in a building composed of room A, room B, room C, room D, and room E, a television antenna 24 is installed outside the building. The television broadcast receiving antenna 24 is connected to the input side of the television amplifier 22. The output side of the television amplifier 22 is connected to the input A of the coupler 21, and the input B of the coupler 21 is connected to the television terminal 5 in the room A via the television antenna cable 20. The output side of the coupler 21 is connected to the input side of the distributor 23. The television antenna cable 20 is connected to the television terminal 5 installed in the room B, the room C, the room D, and the room E through the distributor 23.

また部屋Ａにおいては、テレビ用端子５に分波器１４を接続する。分波器１４は無線ＬＡＮ用出力側に中継アンテナ１８を接続し、テレビ用出力側にテレビ受像機１７を接続する。この部屋Ａには無線ＬＡＮアクセスポイント１５を中継アンテナ１８と無線ＬＡＮアクセスポイント１５のアンテナ１９が近接するように設置し、無線ＬＡＮ端末１６を設置する。無線ＬＡＮ端末１６は部屋Ａ内で無線ＬＡＮアクセスポイント１５と電波の送受信を行う。 In the room A, the duplexer 14 is connected to the TV terminal 5. The duplexer 14 connects the relay antenna 18 to the wireless LAN output side, and connects the television receiver 17 to the television output side. In this room A, the wireless LAN access point 15 is installed so that the relay antenna 18 and the antenna 19 of the wireless LAN access point 15 are close to each other, and the wireless LAN terminal 16 is installed. The wireless LAN terminal 16 transmits and receives radio waves to and from the wireless LAN access point 15 in the room A.

部屋Ｂ、部屋Ｃ、部屋Ｄ、部屋Ｅにおいては、テレビ用端子５に分波器２５を接続する。分波器２５は、無線ＬＡＮ出力側に中継アンテナ３１を接続し、テレビ用出力側にテレビ受像機２９を接続する。この部屋Ｂ、部屋Ｃ、部屋Ｄ、部屋Ｅには無線ＬＡＮ端末２７が設置さる。無線ＬＡＮ端末２７は部屋Ｂ、部屋Ｃ、部屋Ｄ、部屋Ｅから、中継アンテナ３１―分波器２５―部屋Ｂ、部屋Ｃ、部屋Ｄ、部屋Ｅのテレビ用端子５―テレビ用アンテナケーブル２０―分配器２３―結合器２１―部屋Ａのテレビ用端子５―分波器１４―中継アンテナ１８の経路を介して部屋Ａの無線ＬＡＮアクセスポイント１５と電波の送受信を行う。 In the room B, the room C, the room D, and the room E, the duplexer 25 is connected to the TV terminal 5. The duplexer 25 connects the relay antenna 31 to the wireless LAN output side, and connects the television receiver 29 to the television output side. Wireless LAN terminals 27 are installed in the room B, the room C, the room D, and the room E. The wireless LAN terminal 27 is connected to room B, room C, room D, and room E from the relay antenna 31-demultiplexer 25-room B, room C, room D, room E. TV terminal 5-TV antenna cable 20- Radio waves are transmitted / received to / from the wireless LAN access point 15 in the room A via the path of the distributor 23, the coupler 21, the TV terminal 5 in the room A, the duplexer 14, and the relay antenna 18.

Figure 2005184299
Figure 2005184299

表１は、実施例と同じ構成の建物で部屋Ａと部屋Ｂとの間で無線ＬＡＮアクセスポイント１５からテレビ用アンテナケーブル２０を介して電波の送受信を行ったときの無線ＬＡＮ端末２７の受信レベルを測定した測定値である。   Table 1 shows the reception level of the wireless LAN terminal 27 when radio waves are transmitted and received between the room A and the room B from the wireless LAN access point 15 through the television antenna cable 20 in the building having the same configuration as the embodiment. It is the measured value which measured.

部屋Ａの無線ＬＡＮアクセスポイント１５から送信電力６ｄＢｍで電波を送信する。無線ＬＡＮアクセスポイント１５と中継アンテナ１８との距離が１５ｍｍあり、中継アンテナ１８のアンテナ利得が４．３６ｄＢ
で、１５ｍｍの伝播損失がマイナス３．６２ｄＢになる。また、部屋Ａの分波器１４から部屋Ｂの分波器２５の間にあるテレビ用端子、結合器、分配器、テレビ用アンテナケーブルの損失の合計がマイナス３０．１ｄＢになる。部屋Ｂの中継アンテナ２５は指向性のアンテナを使用し部屋Ｂ内だけに電波を放射する。中継アンテナ２５と無線ＬＡＮ端末２７との距離が５ｍあり、中継アンテナ２５のアンテナ利得が６．８６ｄＢで、５ｍの伝播損失がマイナス５４．０７ｄＢになる。 Radio waves are transmitted from the wireless LAN access point 15 in the room A with a transmission power of 6 dBm. The distance between the wireless LAN access point 15 and the relay antenna 18 is 15 mm, and the antenna gain of the relay antenna 18 is 4.36 dB.
Therefore, the propagation loss of 15 mm becomes minus 3.62 dB. Further, the total loss of the television terminal, coupler, distributor, and television antenna cable between the duplexer 14 in the room A and the duplexer 25 in the room B is minus 30.1 dB. The relay antenna 25 in the room B uses a directional antenna and radiates radio waves only in the room B. The distance between the relay antenna 25 and the wireless LAN terminal 27 is 5 m, the antenna gain of the relay antenna 25 is 6.86 dB, and the propagation loss of 5 m is minus 54.07 dB.

部屋Ａの無線ＬＡＮアクセスポイント１５から電波を送信して部屋Ｂの無線ＬＡＮ端末２７で受信する場合の受信レベルは、無線ＬＡＮアクセスポイント１５の送信電力と利得と損失との全ての合計からもとめるのでマイナス７０．６ｄＢｍになる。このとき無線ＬＡＮ端末２７の受信限界レベルがマイナス８０ｄＢｍである。表１の想定値は、部屋Ａの無線ＬＡＮアクセスポイント１５からテレビ用アンテナケーブルを介して部屋Ｂの無線ＬＡＮ端末２７とで電波の送受信を行えることを示している。
The reception level when radio waves are transmitted from the wireless LAN access point 15 in the room A and received by the wireless LAN terminal 27 in the room B is obtained from the sum of all of the transmission power, gain, and loss of the wireless LAN access point 15. It becomes minus 70.6 dBm. At this time, the reception limit level of the wireless LAN terminal 27 is minus 80 dBm. The assumed values in Table 1 indicate that radio waves can be transmitted and received between the wireless LAN access point 15 in the room A and the wireless LAN terminal 27 in the room B via the television antenna cable.

このように、既設のテレビ用アンテナケーブルを用いて、結合器、分波器、中継アンテナを追加するだけで容易に壁等に仕切られた建物内に無線ＬＡＮシステムを構築することが可能になる。   As described above, it is possible to easily construct a wireless LAN system in a building partitioned by a wall or the like simply by adding a coupler, a duplexer, and a relay antenna using an existing television antenna cable. .

壁等に仕切られた部屋に、テレビ用アンテナケーブルが備えられていれば、上述した壁等に仕切られた建物に限定される物ではない。   As long as a TV antenna cable is provided in a room partitioned by a wall or the like, the room is not limited to the building partitioned by the wall or the like.

本発明の実施例を説明図である。It is explanatory drawing of the Example of this invention. 従来の技術を示した図である。It is the figure which showed the prior art.

符号の説明Explanation of symbols

１ テレビ用アンテナ
３ テレビ用アンテナケーブル
５ テレビ用端子
７ 中継アンテナ
１２ 中継アンテナ
１８ 中継アンテナ
２０ テレビ用アンテナケーブル
２４ テレビ用アンテナ
３１ 中継アンテナ DESCRIPTION OF SYMBOLS 1 Television antenna 3 Television antenna cable 5 Television terminal 7 Relay antenna 12 Relay antenna 18 Relay antenna 20 Television antenna cable 24 Television antenna 31 Relay antenna

Claims (2)

壁等に仕切られた、建物内で電波の送受信を行う無線ＬＡＮアクセスポイントと、各部屋で電波の送受信を行う無線ＬＡＮ端末とで構成される無線ＬＡＮシステムにおいて、建物内に設置されたテレビ用アンテナケーブルに接続された、無線ＬＡＮアクセスポイント近接の中継アンテナと、テレビ用アンテナケーブルに接続された、各部屋の中継アンテナを備えることで、無線ＬＡＮアクセスポイント近接の中継アンテナ、テレビ用アンテナケーブル、各部屋の中継アンテナを介して、無線ＬＡＮアクセスポイントと無線ＬＡＮ端末との間で電波の送受信を行うことを特徴とする無線ＬＡＮシステム。 For a TV installed in a building in a wireless LAN system composed of a wireless LAN access point for transmitting and receiving radio waves in a building and a wireless LAN terminal for transmitting and receiving radio waves in each room, partitioned by a wall or the like A relay antenna near the wireless LAN access point connected to the antenna cable and a relay antenna in each room connected to the antenna cable for TV connected to the antenna cable. A wireless LAN system that transmits and receives radio waves between a wireless LAN access point and a wireless LAN terminal via a relay antenna in each room. 無線ＬＡＮアクセスポイントに近接した中継アンテナとテレビ受像機からのテレビ用アンテナケーブルとを一方に接続した分波器と、テレビ用アンテナからのテレビ用アンテナケーブルと上記分波器の他方側からのテレビ用アンテナケーブルとを接続した結合器と、分配器を介して上記結合器に接続される少なくとも１つの部屋の分波器と、この分波器に直接接続される中継アンテナとを備えたことを特徴とする請求項１の無線ＬＡＮシステム。   A duplexer in which a relay antenna close to a wireless LAN access point and a television antenna cable from a television receiver are connected to one side, a television antenna cable from the television antenna, and a television from the other side of the duplexer A coupler connected to the antenna cable, a duplexer in at least one room connected to the coupler via a distributor, and a relay antenna directly connected to the duplexer. The wireless LAN system according to claim 1, wherein:
JP2003420539A 2003-12-18 2003-12-18 Wireless lan system utilizing television antenna cable Withdrawn JP2005184299A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012124822A (en) * 2010-12-10 2012-06-28 Toshiba Corp Radio communication device
JP2019009698A (en) * 2017-06-27 2019-01-17 株式会社長谷工コーポレーション Indoor wireless system and installation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012124822A (en) * 2010-12-10 2012-06-28 Toshiba Corp Radio communication device
JP2019009698A (en) * 2017-06-27 2019-01-17 株式会社長谷工コーポレーション Indoor wireless system and installation method thereof

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