JP3735108B1 - Wireless communication system - Google Patents

Wireless communication system Download PDF

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JP3735108B1
JP3735108B1 JP2004207731A JP2004207731A JP3735108B1 JP 3735108 B1 JP3735108 B1 JP 3735108B1 JP 2004207731 A JP2004207731 A JP 2004207731A JP 2004207731 A JP2004207731 A JP 2004207731A JP 3735108 B1 JP3735108 B1 JP 3735108B1
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wireless communication
communication terminal
leaky transmission
base station
antenna element
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JP2006033290A (en
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順 柳沼
尚弘 松下
智則 杉山
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Toshiba TEC Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1615—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function
    • G06F1/1616—Constructional details or arrangements for portable computers with several enclosures having relative motions, each enclosure supporting at least one I/O or computing function with folding flat displays, e.g. laptop computers or notebooks having a clamshell configuration, with body parts pivoting to an open position around an axis parallel to the plane they define in closed position
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/16—Constructional details or arrangements
    • G06F1/1613—Constructional details or arrangements for portable computers
    • G06F1/1633—Constructional details or arrangements of portable computers not specific to the type of enclosures covered by groups G06F1/1615 - G06F1/1626
    • G06F1/1684—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675
    • G06F1/1698—Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675 the I/O peripheral being a sending/receiving arrangement to establish a cordless communication link, e.g. radio or infrared link, integrated cellular phone

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)

Abstract

【課題】隣り合う無線通信領域間の干渉を避けるために異なる周波数を割当てる必要がなく、周波数の設定を容易にする。しかも、基地局と無線通信端末との間で良好な無線通信を行う。
【解決手段】基地局１５に接続した漏洩伝送路１４を複数並行に配置すると共に漏洩伝送路１４を介して基地局１５と無線通信する無線通信端末１７を配置し、各漏洩伝送路１４は、隣り合う漏洩伝送路間で輻射方向が逆向きになるように配置し、無線通信端末１７は、短尺の漏洩伝送路をアンテナ素子として備え、そのアンテナ素子の輻射方向を近くにある少なくとも１つの漏洩伝送路の輻射方向と一致させて通信を行う。
【選択図】 図１ There is no need to assign different frequencies in order to avoid interference between adjacent wireless communication areas, and frequency setting is facilitated. Moreover, good wireless communication is performed between the base station and the wireless communication terminal.
A plurality of leaky transmission lines 14 connected to a base station 15 are arranged in parallel and a radio communication terminal 17 is arranged to communicate wirelessly with the base station 15 via the leaky transmission line 14. Arranged so that the radiation directions are opposite between adjacent leakage transmission paths, the wireless communication terminal 17 includes a short leakage transmission path as an antenna element, and at least one leakage in the vicinity of the radiation direction of the antenna element. Communication is performed in accordance with the radiation direction of the transmission line.
[Selection] Figure 1

Description

本発明は、例えば、オフィス内においてホストコンピュータとクライアント端末が無線でデータ通信を行う場合に使用される無線通信システムに関する。   The present invention relates to a wireless communication system used when, for example, a host computer and a client terminal perform data communication wirelessly in an office.

従来、この種の無線通信システムは、屋内の天井などに複数の基地局を、互いに所定の間隔を隔てて配置し、各基地局がそれぞれの無線通信領域内で無線通信端末と無線通信を行うものが知られている（例えば、特許文献１参照）。   Conventionally, in this type of wireless communication system, a plurality of base stations are arranged at predetermined intervals on an indoor ceiling or the like, and each base station performs wireless communication with a wireless communication terminal within each wireless communication area. Those are known (for example, see Patent Document 1).

例えば、図７に示すように、屋内１の天井に複数の基地局２を、各基地局２の無線通信領域３が無線通信端末４を配置しているデスク５の上を隙間無くカバーできるように互いに所定の間隔を隔てて配置している。なお、６はパーティションである。   For example, as shown in FIG. 7, it is possible to cover a plurality of base stations 2 on the ceiling of the indoor 1 and cover the desk 5 on which the radio communication area 3 of each base station 2 has the radio communication terminals 4 without gaps. Are arranged at a predetermined interval from each other. Reference numeral 6 denotes a partition.

このような無線通信システムは、通信不能エリアが生じないように隣り合う基地局の無線通信領域３の一部が重なるように設定され、また、隣り合う領域間の電波の干渉を避けるため少なくとも隣り合う領域間では異なる周波数を割当てている。
特開平７−１１５４２２号公報 Such a wireless communication system is set so that a part of the wireless communication areas 3 of adjacent base stations overlap so that an incommunicable area does not occur, and at least adjacent to avoid radio wave interference between adjacent areas. Different frequencies are assigned between matching regions.
JP-A-7-115422

このように、従来の無線通信システムは、少なくとも隣り合う領域間の干渉を避けるため異なる周波数を割当てる必要があり、基地局の数が増加すると周波数の設定が複雑化するという問題があった。   As described above, the conventional wireless communication system needs to assign different frequencies in order to avoid at least interference between adjacent regions, and there is a problem that frequency setting becomes complicated as the number of base stations increases.

本発明は、このような問題を解決するために為されたもので、隣り合う無線通信領域間の干渉を避けるために異なる周波数を割当てる必要がなく、従って、周波数の設定が容易で有り、しかも、基地局と無線通信端末との間で良好な無線通信ができる無線通信システムを提供する。   The present invention has been made to solve such a problem, and it is not necessary to assign different frequencies in order to avoid interference between adjacent wireless communication areas. Therefore, the frequency setting is easy, and Provided is a wireless communication system capable of performing good wireless communication between a base station and a wireless communication terminal.

本発明は、基地局に接続した、信号の進行方向に輻射方向を有する漏洩伝送路を複数並行に配置すると共に、漏洩伝送路を介して基地局と無線通信する無線通信端末を配置し、各漏洩伝送路は、隣り合う漏洩伝送路間で輻射方向が逆向きになるように配置し、無線通信端末は、信号の進行方向に輻射方向を有する短尺の漏洩伝送路をアンテナ素子として備え、そのアンテナ素子の輻射方向を近くにある少なくとも１つの漏洩伝送路の輻射方向と向かい合わせて通信を行うことにある。   The present invention arranges a plurality of leaky transmission lines connected to a base station and having a radiation direction in the signal traveling direction in parallel, and arranges wireless communication terminals that wirelessly communicate with the base station via the leaky transmission lines, The leaky transmission line is arranged so that the radiation direction is opposite between adjacent leaky transmission lines, and the wireless communication terminal includes a short leaky transmission line having a radiation direction in the signal traveling direction as an antenna element. Communication is performed with the radiation direction of the antenna element facing the radiation direction of at least one leaky transmission line nearby.

本発明によれば、隣り合う無線通信領域間の干渉を避けるために異なる周波数を割当てる必要がなく、従って、周波数の設定が容易で有り、しかも、基地局と無線通信端末との間で良好な無線通信ができる無線通信システムを提供できる。   According to the present invention, it is not necessary to assign different frequencies in order to avoid interference between adjacent radio communication areas, and therefore it is easy to set the frequency, and it is good between the base station and the radio communication terminal. A wireless communication system capable of wireless communication can be provided.

以下、本発明の実施の形態を、図面を参照して説明する。
（第１の実施の形態）
図１は無線通信システムの全体構成を示すもので、屋内１１に複数のデスク１２を、２列ずつに並べて配置し、各列の間をパーティション１３で仕切っている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 shows the overall configuration of a wireless communication system. A plurality of desks 12 are arranged in two rows in an indoor space 11 and partitions are partitioned by partitions 13.

そして、図２に示すように、各パーティション１３の上に漏洩同軸ケーブル等からなる漏洩伝送路１４をそれぞれ配置し、その各漏洩伝送路１４の一端を基地局１５に接続し、他端を終端器１６に接続している。前記デスク１２の上にはパーソナルコンピュータ等からなる無線通信端末１７が配置され、オペレータによって操作されるようになっている。前記無線通信端末１７は、ディスプレイ１７ａを収納した筐体の先端に短尺の漏洩伝送路をアンテナ素子１８として備えている。   Then, as shown in FIG. 2, a leaky transmission line 14 made of a leaky coaxial cable or the like is arranged on each partition 13, one end of each leaky transmission line 14 is connected to the base station 15, and the other end is terminated. Connected to the vessel 16. A wireless communication terminal 17 composed of a personal computer or the like is disposed on the desk 12 and is operated by an operator. The wireless communication terminal 17 is provided with a short leak transmission path as an antenna element 18 at the tip of a casing housing the display 17a.

前記漏洩伝送路１４は、一定の間隔で複数の放射スロットを設けており、図３に示すように、基地局１５から終端器１６へ向かう信号の進行方向と同じ方向に電波を輻射するもので、その輻射方向は、信号の進行方向に対して垂直な方向を基準にして輻射角θとなるように設定されている。なお、前記無線通信端末１７のアンテナ素子１８として使用される漏洩伝送路も同様の構成になっている。   The leaky transmission line 14 is provided with a plurality of radiation slots at regular intervals, and radiates radio waves in the same direction as the signal traveling from the base station 15 to the terminator 16 as shown in FIG. The radiation direction is set to be a radiation angle θ with reference to a direction perpendicular to the signal traveling direction. The leaky transmission line used as the antenna element 18 of the wireless communication terminal 17 has the same configuration.

前記各パーティション１３の上に配置する漏洩伝送路１４は、隣り合う漏洩伝送路１４間で輻射方向が逆向きになるように配置している。すなわち、隣り合う漏洩伝送路１４間で基地局１５と終端器１６の位置が逆になるようにして配置している。そして、前記各漏洩伝送路１４はそれぞれ無線通信領域１９を形成し、隣り合う漏洩伝送路１４によって形成される無線通信領域１９は一部が重なるようになっている。   The leaky transmission line 14 arranged on each partition 13 is arranged so that the radiation direction is opposite between adjacent leaky transmission lines 14. That is, the base station 15 and the terminator 16 are disposed so that the positions of the base station 15 and the terminator 16 are reversed between the adjacent leaky transmission lines 14. Each leaky transmission line 14 forms a wireless communication area 19, and the wireless communication areas 19 formed by adjacent leaky transmission lines 14 partially overlap each other.

このような構成においては、図４に示すように、基地局１５-1及び終端器１６-1に接続している漏洩伝送路１４-1と、基地局１５-2及び終端器１６-2に接続している漏洩伝送路１４-2が隣り合っている場合に、その近傍のデスク１２の上に配置された無線通信端末１７のアンテナ素子１８の輻射方向が漏洩伝送路１４-1の輻射方向と一致、あるいは略一致している場合、無線通信端末１７のアンテナ素子１８は漏洩伝送路１４-1からの到来波を強く受信する。これに対し、漏洩伝送路１４-2からの到来波の方向はアンテナ素子１８の輻射方向とは反対側になるので漏洩伝送路１４-2からの到来波の影響を最小限に留め、干渉を受けることはない。   In such a configuration, as shown in FIG. 4, the leaky transmission line 14-1 connected to the base station 15-1 and the terminator 16-1, and the base station 15-2 and the terminator 16-2 are connected. When the connected leaky transmission lines 14-2 are adjacent to each other, the radiation direction of the antenna element 18 of the wireless communication terminal 17 disposed on the desk 12 in the vicinity thereof is the radiation direction of the leaky transmission line 14-1. , Or substantially match, the antenna element 18 of the wireless communication terminal 17 strongly receives the incoming wave from the leaky transmission path 14-1. On the other hand, since the direction of the incoming wave from the leaky transmission path 14-2 is opposite to the radiation direction of the antenna element 18, the influence of the incoming wave from the leaky transmission path 14-2 is minimized, and interference is prevented. I will not receive it.

こうして、無線通信端末１７はアンテナ素子１８を使用し、漏洩伝送路１４-1を経由して基地局１５-1と良好な無線通信ができる。そして、隣接した無線通信領域１９間の電波の干渉は、隣接した漏洩伝送路１４の輻射方向が逆向きにすることで対処しているので、隣接した漏洩伝送路間で異なる周波数を割当てる必要がなく、周波数の設定が容易となる。   Thus, the wireless communication terminal 17 can perform good wireless communication with the base station 15-1 via the leaky transmission line 14-1 using the antenna element 18. And since the interference of the radio wave between the adjacent wireless communication areas 19 is dealt with by making the radiation direction of the adjacent leaky transmission line 14 reverse, it is necessary to assign different frequencies between the adjacent leaky transmission lines. The frequency can be easily set.

なお、この実施の形態においては、基地局１５と漏洩伝送路１４との関係を１対１にした場合について述べたがこれに限定するものではなく、基地局１５と漏洩伝送路１４との関係を１対複数にしてもよい。すなわち、同じ向きの複数の漏洩伝送路１４を１つの基地局１５に接続するようにしてもよい。   In this embodiment, the case where the relationship between the base station 15 and the leaky transmission path 14 is 1: 1 is described, but the present invention is not limited to this, and the relationship between the base station 15 and the leaky transmission path 14 is described. May be a plurality of pairs. That is, a plurality of leaky transmission lines 14 in the same direction may be connected to one base station 15.

（第２の実施の形態）
この実施の形態は、無線通信端末１７のアンテナの変形例について述べる。基地局１５及び終端器１６に接続した漏洩伝送路１４の配置については第１の実施の形態と同じであり、図１の構成になっている。 (Second Embodiment)
This embodiment describes a modification of the antenna of the wireless communication terminal 17. The arrangement of the leaky transmission line 14 connected to the base station 15 and the terminator 16 is the same as that of the first embodiment and has the configuration shown in FIG.

図５に示すように、無線通信端末１７は、ディスプレイ１７ａを収納した筐体の先端に、回転機構２０を介してアンテナ素子１８を収納した部材２１を取付けている。前記回転機構２０は部材２１を水平方向に左右に１８０度回転させるようになっている。なお、１８０度以上、例えば、３６０度回転するものであってもよい。   As shown in FIG. 5, the wireless communication terminal 17 has a member 21 that houses the antenna element 18 via a rotation mechanism 20 attached to the tip of a housing that houses the display 17 a. The rotating mechanism 20 rotates the member 21 180 degrees horizontally in the horizontal direction. It may be rotated 180 degrees or more, for example, 360 degrees.

このような構成においては、図６に示すように、無線通信端末１７を無線通信領域１９-1に配置したときには、漏洩伝送路１４からの電波の輻射方向と無線通信端末１７のアンテナ素子１８からの電波の輻射方向が一致あるいは略一致するので、無線通信端末１７は漏洩伝送路１４を経由して基地局１５とデータ通信ができる。   In such a configuration, as shown in FIG. 6, when the wireless communication terminal 17 is arranged in the wireless communication area 19-1, the radiation direction of the radio wave from the leaky transmission line 14 and the antenna element 18 of the wireless communication terminal 17 Therefore, the radio communication terminal 17 can perform data communication with the base station 15 via the leaky transmission line 14.

しかし、この無線通信端末１７を無線通信領域１９-2に配置したときには、図６に示すように、無線通信端末１７の向きが逆になるため、漏洩伝送路１４からの電波の輻射方向と無線通信端末１７のアンテナ素子１８からの電波の輻射方向が逆になって充分な受信電界強度が得られなくなり、無線通信端末１７は基地局１５とデータ通信ができなくなる。そこで、アンテナ素子１８を回転機構２０によって１８０度回転する。   However, when the wireless communication terminal 17 is arranged in the wireless communication area 19-2, the direction of the wireless communication terminal 17 is reversed as shown in FIG. The radiation direction of the radio wave from the antenna element 18 of the communication terminal 17 is reversed, so that a sufficient received electric field strength cannot be obtained, and the radio communication terminal 17 cannot perform data communication with the base station 15. Therefore, the antenna element 18 is rotated 180 degrees by the rotation mechanism 20.

これにより、漏洩伝送路１４からの電波の輻射方向と無線通信端末１７のアンテナ素子１８からの電波の輻射方向が一致あるいは略一致するようになり、無線通信端末１７は漏洩伝送路１４を経由して基地局１５とデータ通信ができる。このように、無線通信端末１７のアンテナ素子１８の向きを１８０度変えることができるので、無線通信端末１７をどの無線通信領域に配置しても基地局１５とデータ通信を行うことができる。   As a result, the radiation direction of the radio wave from the leaky transmission path 14 and the radiation direction of the radio wave from the antenna element 18 of the radio communication terminal 17 coincide with each other, and the radio communication terminal 17 passes through the leaky transmission path 14. Thus, data communication with the base station 15 is possible. Thus, since the direction of the antenna element 18 of the radio communication terminal 17 can be changed by 180 degrees, data communication with the base station 15 can be performed regardless of the radio communication area where the radio communication terminal 17 is arranged.

なお、この実施の形態では、無線通信端末１７のアンテナ素子１８の向きを回転機構２０によって回転して変えるようにしたがこれに限定するものではなく、無線通信端末１７に対してアンテナ素子１８を収納した部材２１を着脱自在にしておき、オペレータが部材２１を無線通信端末１７から離脱し再度装着することでアンテナ素子１８の向きを変えるようにしてもよい。   In this embodiment, the direction of the antenna element 18 of the wireless communication terminal 17 is changed by rotating by the rotation mechanism 20. However, the present invention is not limited to this, and the antenna element 18 is attached to the wireless communication terminal 17. The accommodated member 21 may be made detachable, and the operator may change the direction of the antenna element 18 by removing the member 21 from the wireless communication terminal 17 and mounting it again.

本発明の、第１の実施の形態に係る無線通信システムの全体構成を示す図。The figure which shows the whole structure of the radio | wireless communications system which concerns on 1st Embodiment of this invention. 同実施の形態における基地局、漏洩伝送路、無線通信端末、アンテナ素子の配置関係を示す斜視図。The perspective view which shows the arrangement | positioning relationship of the base station in the same embodiment, a leaky transmission line, a radio | wireless communication terminal, and an antenna element. 同実施の形態における漏洩伝送路の輻射角を示す図。The figure which shows the radiation angle of the leaky transmission line in the embodiment. 同実施の形態における隣接した漏洩伝送路からの到来波の方向と無線通信端末のアンテナ素子による受信との関係を説明するための斜視図。The perspective view for demonstrating the relationship between the direction of the incoming wave from the adjacent leaky transmission line in the same embodiment, and reception by the antenna element of a radio | wireless communication terminal. 本発明の、第２の実施の形態に係る無線通信端末の構成を示す斜視図。The perspective view which shows the structure of the radio | wireless communication terminal which concerns on the 2nd Embodiment of this invention. 同実施の形態における無線通信端末のアンテナ素子の動作を説明するための図。The figure for demonstrating operation | movement of the antenna element of the radio | wireless communication terminal in the embodiment. 従来における無線通信システムの全体構成を示す図。The figure which shows the whole structure of the conventional radio | wireless communications system.

符号の説明Explanation of symbols

１４…漏洩伝送路、１５…基地局、１７…無線通信端末、１８…アンテナ素子。   14 ... Leakage transmission path, 15 ... Base station, 17 ... Wireless communication terminal, 18 ... Antenna element.

Claims (2)

基地局に接続した、信号の進行方向に輻射方向を有する漏洩伝送路を複数並行に配置すると共に、前記漏洩伝送路を介して前記基地局と無線通信する無線通信端末を配置し、
前記各漏洩伝送路は、隣り合う漏洩伝送路間で輻射方向が逆向きになるように配置し、前記無線通信端末は、信号の進行方向に輻射方向を有する短尺の漏洩伝送路をアンテナ素子として備え、そのアンテナ素子の輻射方向を近くにある少なくとも１つの漏洩伝送路の輻射方向と向かい合わせて通信を行うことを特徴とする無線通信システム。 A plurality of leaky transmission paths connected to the base station and having a radiation direction in the signal traveling direction are arranged in parallel, and a radio communication terminal that performs radio communication with the base station via the leaky transmission path is arranged,
Each of the leaky transmission lines is arranged so that the radiation direction is opposite between adjacent leaky transmission lines, and the wireless communication terminal uses a short leaky transmission line having a radiation direction in the signal traveling direction as an antenna element. A wireless communication system, wherein the communication is performed with the radiation direction of the antenna element facing the radiation direction of at least one leaky transmission line nearby. 無線通信端末は、アンテナ素子を、輻射方向の向きを逆向きにできるように変更可能に取付けたことを特徴とする請求項１記載の無線通信システム。   2. The wireless communication system according to claim 1, wherein the wireless communication terminal is mounted so that the antenna element can be changed so that the direction of the radiation direction can be reversed.
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