JP3431528B2

JP3431528B2 - Communication system and communication method

Info

Publication number: JP3431528B2
Application number: JP03169299A
Authority: JP
Inventors: 正朋森岡; 壮小田原; 公博田島
Original assignee: Panasonic Corp; NTT Advanced Technology Corp; Nippon Telegraph and Telephone Corp; Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Corp; NTT Advanced Technology Corp; Nippon Telegraph and Telephone Corp; Panasonic Holdings Corp
Priority date: 1999-02-09
Filing date: 1999-02-09
Publication date: 2003-07-28
Anticipated expiration: 2019-02-09
Also published as: JP2000232405A

Description

Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、通信システムおよ
び通信方法に関し、より特定的には、移動可能な通信装
置（以下、移動端末という）から固定された通信装置
（以下、固定基地局という）へ向かう上り通信の伝送媒
体として、赤外線，可視光線，紫外線等の光学的電磁波
（以下、赤外線等と称する）を用いる通信システムおよ
び通信方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system and a communication method, and more particularly, to a communication device fixed from a movable communication device (hereinafter referred to as a mobile terminal) (hereinafter referred to as a fixed base station). The present invention relates to a communication system and a communication method that use optical electromagnetic waves such as infrared rays, visible rays, and ultraviolet rays (hereinafter referred to as infrared rays) as a transmission medium for upstream communication.

【０００２】[0002]

【従来の技術】近年、携帯電話システムやＰＨＳ（パー
ソナル・ハンディホン・システム）等の伝送媒体として
電波を用いた移動体通信システムが急速に増加してい
る。これらの電波を用いた移動体通信システムは、何処
ででも通信が行え非常に利便性が高いが、その反面、通
信に用いる電波により周辺の電子機器に電波障害を与
え、誤動作を引き起こす可能性があるという問題を抱え
ていた。2. Description of the Related Art In recent years, mobile communication systems using radio waves as a transmission medium for mobile phone systems, PHSs (personal handy phone systems) and the like have been rapidly increasing. Mobile communication systems using these radio waves are extremely convenient because they can communicate anywhere, but on the other hand, the radio waves used for communication may interfere with peripheral electronic devices and cause malfunctions. I had a problem.

【０００３】そこで、この問題を解決すべく、本願発明
者等は、先に出願した特願平８−３１１２６３号「移動
通信方法、通信装置及び筐体」（以下、先出願の技術と
いう）において、新たな通信システムを提案している。
以下、この先出願の技術に係る新たな通信システムにつ
いて、図３を用いて簡単に説明する。In order to solve this problem, the inventors of the present application have filed a patent application in Japanese Patent Application No. 8-311263 “Mobile communication method, communication device and housing” (hereinafter referred to as “technology of prior application”). , Proposes a new communication system.
Hereinafter, a new communication system according to the technology of this prior application will be briefly described with reference to FIG.

【０００４】図３は、先出願の技術に係る通信システム
の構成の一例を示す図である。図３において、先出願の
技術に係る通信システムは、移動端末１０１と、固定基
地局群１０２と、固定端末３００と、通信網１０４とか
ら構成される。移動端末１０１は、内蔵または接続され
る光送信部１１１と電波受信部１１２とを備える。固定
基地局群１０２は、固定基地局１２０と、固定基地局１
２０の下り通信エリア内に分散して設置される複数の光
受信部１２１〜１２Ｎ（Ｎは、２以上の整数。以下同
じ）とを備え、双方をケーブル１７１で接続している。
また、固定基地局１２０と固定端末３００とは、通信網
１０４を介してケーブル１７２，１７３で相互に接続さ
れている。FIG. 3 is a diagram showing an example of the configuration of a communication system according to the technique of the prior application. In FIG. 3, the communication system according to the technique of the prior application includes a mobile terminal 101, a fixed base station group 102, a fixed terminal 300, and a communication network 104. The mobile terminal 101 includes an optical transmitter 111 and a radio wave receiver 112 that are built in or connected to each other. The fixed base station group 102 includes the fixed base station 120 and the fixed base station 1
It is provided with a plurality of optical receivers 121 to 12N (N is an integer of 2 or more. The same applies hereinafter) installed in a distributed manner in 20 downlink communication areas, and both are connected by a cable 171.
Further, the fixed base station 120 and the fixed terminal 300 are connected to each other by the cables 172 and 173 via the communication network 104.

【０００５】そして、上記構成による先出願の技術に係
る通信システムは、移動端末１０１と固定端末３００と
の間の通信において、固定基地局１２０から移動端末１
０１への下り方向および移動端末１０１から固定基地局
１２０への上り方向の通信を、それぞれ以下のようにし
て行う。下り方向については、電波１５２を伝送媒体と
して、固定基地局１２０が端末装置１０１へ直接通信を
行う。一方、上り方向については、赤外線等１６２を伝
送媒体として、移動端末１０１が光送信部１１１から光
受信部１２ｉ（ｉは、１〜Ｎのいずれか）に対してまず
通信を行う。その後、光受信部１２ｉが、受信した上り
通信をケーブル１７１を介して固定基地局１２０に送信
する。In the communication system according to the technique of the prior application having the above configuration, the fixed base station 120 to the mobile terminal 1 are used in the communication between the mobile terminal 101 and the fixed terminal 300.
The downward communication to 01 and the upward communication from the mobile terminal 101 to the fixed base station 120 are performed as follows. In the downstream direction, the fixed base station 120 directly communicates with the terminal device 101 using the radio wave 152 as a transmission medium. On the other hand, in the upstream direction, the mobile terminal 101 first communicates from the optical transmitting unit 111 to the optical receiving unit 12i (i is any of 1 to N) using infrared rays 162 as a transmission medium. Then, the optical receiver 12i transmits the received upstream communication to the fixed base station 120 via the cable 171.

【０００６】このように、上記先出願の技術に係る通信
システムは、誤動作の主原因である移動端末１０１から
固定基地局群１０２への上り通信用の伝送媒体として、
電波１５２の代わりに赤外線等１６２を使用すること
で、周辺の電子機器に電波障害を与えないようにするも
のである。なお、赤外線等１６２は、電波１５２と比較
して直進性および距離による減衰率が高いという特性が
ある。そのため、上記先出願の技術に係る通信システム
では、電波１５２を利用した下り通信の通信エリアに比
べ、赤外線等１６２を利用した上り通信の通信エリアが
狭くなるので、一般に固定基地局１２０の下り通信の通
信エリア内に複数の光受信部１２１〜１２Ｎを設け、光
受信部１２１〜１２Ｎと固定基地局１２０とは有線（ケ
ーブル１７１）接続する構成となる。As described above, the communication system according to the technique of the above-mentioned prior application is as a transmission medium for uplink communication from the mobile terminal 101 to the fixed base station group 102, which is the main cause of malfunction,
By using infrared rays 162 or the like instead of the radio waves 152, it is possible to prevent radio waves from being disturbed by electronic devices in the vicinity. It should be noted that the infrared rays 162 and the like have characteristics that they are straight ahead and have a higher attenuation rate due to distance than the radio waves 152. Therefore, in the communication system according to the technique of the above-mentioned prior application, the communication area for uplink communication using infrared rays 162 is smaller than the communication area for downlink communication using radio waves 152, and thus downlink communication of fixed base station 120 is generally performed. A plurality of optical receivers 121 to 12N are provided in the communication area of 1), and the optical receivers 121 to 12N and the fixed base station 120 are connected by cable (cable 171).

【０００７】[0007]

【発明が解決しようとする課題】ところで、１つの固定
基地局における下り通信エリアより広いエリアをカバー
する場合、または、通信システムとして求められる同時
通話能力が１つの固定基地局の同時通話能力を超える場
合には、通信システムとして、複数の固定基地局を設置
する必要がある。このように複数の固定基地局を設置す
る場合、ユーザの利便性を考慮して連続した通話エリア
を確保するため、および、固定基地局設置上の制限にお
ける問題などから、一般に複数の固定基地局の下り通信
エリアが重なるエリア（以下、重複通信エリアという）
が発生する。従って、この重複通信エリアに居る移動端
末は、複数の固定基地局からの下り通信を受信すること
が可能となる。By the way, in the case of covering a wider area than the downlink communication area in one fixed base station, or the simultaneous communication capacity required as a communication system exceeds the simultaneous communication capacity of one fixed base station. In this case, it is necessary to install a plurality of fixed base stations as a communication system. When a plurality of fixed base stations are installed in this way, a plurality of fixed base stations are generally used in order to secure a continuous communication area in consideration of user convenience and due to problems in restrictions on installation of the fixed base stations. Areas in which the downlink communication areas of the two overlap (hereinafter referred to as the overlapping communication area)
Occurs. Therefore, a mobile terminal in this overlapping communication area can receive downlink communication from a plurality of fixed base stations.

【０００８】しかしながら、下り通信に電波、上り通信
に赤外線等を利用した上記先出願の技術に係る通信シス
テムにおいては、複数の固定基地局の下り通信エリアが
重なる重複通信エリアが存在する場合、以下に示す問題
点がまだ残っている。However, in the communication system according to the technology of the above-mentioned prior application that uses radio waves for downlink communication and infrared rays for uplink communication, if there are overlapping communication areas in which downlink communication areas of a plurality of fixed base stations overlap, The problem shown in is still left.

【０００９】図４において、固定基地局１２０と固定基
地局１３０とは、固定基地局１２０の下り通信の通信エ
リアＺ１２０と固定基地局１３０の下り通信の通信エリ
アＺ１３０とが重なる状態で設置されており、重複通信
エリアＺ１２０１３０が存在しているものとする。ま
た、この重複通信エリアＺ１２０１３０には、固定基地
局１３０と有線接続されている光受信部１３１が設置さ
れているものとする。In FIG. 4, fixed base station 120 and fixed base station 130 are installed such that downlink communication area Z120 of fixed base station 120 and downlink communication area Z130 of fixed base station 130 overlap. It is assumed that the overlapping communication area Z120130 exists. In addition, it is assumed that an optical receiver 131 that is wire-connected to the fixed base station 130 is installed in the overlapping communication area Z120130.

【００１０】ここで、移動端末１０１が通信エリアＺ１
２０内で位置登録をした後、重複通信エリアＺ１２０１
３０に移動し、ここで電話をかけようとした場合を考え
る。この場合、移動端末１０１は、固定基地局１２０の
下り通信情報が受信できるため、固定基地局１２０宛に
赤外線等１６２を用いて発呼情報を送信する。これに対
し、重複通信エリアＺ１２０１３０に設置されているの
は固定基地局１３０に有線接続された光受信部１３１で
あるため、移動端末１０１が固定基地局１２０宛に発呼
した情報は、光受信部１３１のみが受信することとな
る。しかし、固定基地局１３０は、光受信部１３１を介
して受け取った発呼情報が自局宛ではないため（位置登
録された移動端末からではないため）、当該発呼情報を
ノイズと判断して破棄してしまう。そのため、移動端末
１０１を使用して電話をかけようとしたユーザは、目の
前に光受信部１３１があるにもかかわらず、通話できな
い状態となる。Here, the mobile terminal 101 is in the communication area Z1.
After registering the location within 20, duplicate communication area Z1201
Consider the case where you move to 30 and try to make a call here. In this case, since the mobile terminal 101 can receive the downlink communication information of the fixed base station 120, the mobile terminal 101 transmits the calling information to the fixed base station 120 using infrared rays 162 or the like. On the other hand, since the optical receiving unit 131 wiredly connected to the fixed base station 130 is installed in the overlapping communication area Z120130, the information transmitted by the mobile terminal 101 to the fixed base station 120 is Only the unit 131 will receive it. However, the fixed base station 130 determines that the calling information is noise because the calling information received via the optical receiving unit 131 is not addressed to itself (not from the mobile terminal whose position is registered). I will discard it. Therefore, the user who tries to make a call using the mobile terminal 101 is in a state where he / she cannot make a call even though the optical receiver 131 is in front of him.

【００１１】また、通信エリアＺ１２０内で位置登録を
した後、重複通信エリアＺ１２０１３０に移動してきた
移動端末１０１宛に電話がかかってきた場合を考える。
この場合、通信システムは、最後に位置登録をしている
固定基地局１２０を通じて移動端末１０１へ着呼情報を
送信し、移動端末１０１は、この着呼情報を受信してこ
れに対する応答を発光する。しかし、上記の場合と同様
に、重複通信エリアＺ１２０１３０に設置されているの
は光受信部１３１であるため、光受信部１３１を介して
固定基地局１２０宛の着呼応答情報を受け取った固定基
地局１３０は、当該着呼応答情報をノイズと判断して破
棄してしまう。そのため、着信音が鳴っている移動端末
１０１のユーザは、目の前に光受信部１３１があるにも
かかわらず、やはり通話できない状態となる。Also, consider a case where a call is made to the mobile terminal 101 that has moved to the duplicate communication area Z120130 after location registration in the communication area Z120.
In this case, the communication system transmits the incoming call information to the mobile terminal 101 through the fixed base station 120 that has finally registered the location, and the mobile terminal 101 receives the incoming call information and emits a response thereto. . However, as in the case described above, since the optical receiving unit 131 is installed in the overlapping communication area Z120130, the fixed base station which receives the incoming call response information addressed to the fixed base station 120 via the optical receiving unit 131. The station 130 determines that the incoming call response information is noise and discards it. Therefore, the user of the mobile terminal 101, which is ringing the ring tone, is still in a state where the user cannot talk even though the optical receiver 131 is in front of him.

【００１２】このように、移動端末１０１は、最後に位
置登録を行った固定基地局１２０に対し発呼情報を送信
するため、上述のように、通信を行う重複通信エリアＺ
１２０１３０内に存在する光受信部１３１が有線接続さ
れた、すなわち光受信部１３１を管轄する固定基地局１
３０が、最後に位置登録を行った固定基地局１２０と異
なる場合には、上り通信が成立しないという問題を残し
ていた。As described above, since the mobile terminal 101 transmits the calling information to the fixed base station 120 that has finally registered the location, as described above, the overlapping communication area Z where communication is performed.
A fixed base station 1 that is connected to a light receiving unit 131 existing in 120130 by wire, that is, controls the light receiving unit 131.
If 30 is different from the fixed base station 120 that performed the last location registration, there remains a problem that upstream communication cannot be established.

【００１３】それ故、本発明の目的は、誤動作の主原因
である移動端末から固定基地局群へ向かう上り通信の伝
送媒体として、電波の代わりに赤外線等を使用すること
で、周辺の電子機器に電波障害を与えないようにすると
ともに、移動端末の移動に影響されることなく確実に通
信が行える通信システムおよび通信方法を提供すること
である。Therefore, the object of the present invention is to use infrared rays or the like instead of radio waves as a transmission medium for upstream communication from a mobile terminal to a fixed base station group, which is the main cause of malfunction, and to use peripheral electronic equipment. (EN) Provided are a communication system and a communication method which are capable of surely performing communication without being affected by movement of a mobile terminal while preventing radio interference from occurring.

【００１４】[0014]

【課題を解決するための手段および発明の効果】第１の
発明は、複数の固定基地局と１つ以上の移動端末との間
の情報伝送を、複数の中継局を介して行う通信システム
であって、固定基地局は、移動端末に対する下り通信
を、電波を伝送媒体とする第１の無線伝送で行う手段
と、中継局に対する補助通信を、有線伝送で行う手段
と、中継局から送信される上り通信を、受信する手段と
を備え、中継局は、固定基地局から送信される補助通信
を、受信する手段と、移動端末に対し、自局を管轄する
固定基地局の識別符号を含む下り補助通信を、赤外線等
を伝送媒体とする第２の無線伝送で行う手段と、赤外線
等を伝送媒体とする第３の無線伝送によって移動端末か
ら送信される上り通信を、受信する手段と、移動端末か
ら受信した上り通信を、固定基地局へ有線伝送で送信す
る手段とを備え、移動端末は、固定基地局から第１の無
線伝送によって送信される下り通信を、受信する手段
と、中継局から第２の無線伝送によって送信される下り
補助通信を受信して、通信対象とする当該中継局を管轄
する固定基地局を認識する手段と、認識した固定基地局
との通信を確立するように、中継局に対する上り通信
を、第３の無線伝送で行う手段とを備え、固定基地局か
ら移動端末への下り方向の通信を、第１の無線伝送と、
有線伝送及び第２の無線伝送とで実現し、移動端末から
固定基地局への上り方向の通信を、第３の無線伝送及び
有線伝送で実現する。The first invention is a communication system for transmitting information between a plurality of fixed base stations and one or more mobile terminals via a plurality of relay stations. Therefore, the fixed base station is the downlink communication for the mobile terminal.
For performing first wireless transmission using radio waves as a transmission medium
And means for performing auxiliary communication to the relay station by wire transmission
And means for receiving the upstream communication transmitted from the relay station,
And the relay station is an auxiliary communication transmitted from the fixed base station.
To control the mobile station and the mobile station
Infrared, etc. for downlink auxiliary communication including identification code of fixed base station
Means for performing a second wireless transmission using a transmission medium, and infrared rays
A mobile terminal through a third wireless transmission using a transmission medium such as
From the mobile terminal
The uplink communication received from the device is sent to the fixed base station by wire transmission.
And means that, mobile terminal, the first free from fixed base station
Means for receiving downlink communication transmitted by line transmission
And the downlink transmitted from the relay station by the second wireless transmission.
Receives auxiliary communication and has jurisdiction over the relay station concerned
To recognize the fixed base station to
Uplink communication to the relay station to establish communication with
And a means for performing the third wireless transmission, and performing downlink communication from the fixed base station to the mobile terminal by the first wireless transmission,
This is realized by wired transmission and second wireless transmission, and uplink communication from the mobile terminal to the fixed base station is performed by the third wireless transmission and
Achieved by wire transmission .

【００１５】上記のように、第１の発明によれば、固定
基地局から移動端末への伝送媒体として電波を用いて下
り通信を行い、移動端末から固定基地局への伝送媒体と
して赤外線等を用いて上り通信を行う。さらに、中継局
を管轄する固定基地局の識別符号に関し、赤外線等を伝
送媒体に用いて下り補助通信を行う。これにより、誤動
作の主原因である移動端末から固定基地局へ向かう上り
通信において、周辺の電子機器に電波障害を与えること
がなくなる。また、移動端末は、上り通信を行うときに
中継局からの下り補助通信を受信することで、近くに存
在する中継局を管轄する固定基地局を特定することがで
きる。従って、複数の固定基地局の下り通信エリアが重
なったエリアで、移動端末が送信する上り通信の送り先
の固定基地局と、実際にその上り通信を受信する固定基
地局とが異なるという状況が生じなくなり、確実に上下
方向の通信を行うことができる。 As described above, according to the first invention, downlink communication is performed using radio waves as a transmission medium from the fixed base station to the mobile terminal, and infrared rays or the like is used as the transmission medium from the mobile terminal to the fixed base station. Used for upstream communication. In addition, the relay station
Regarding the identification code of the fixed base station that has jurisdiction over
Used as a transmission medium to perform downlink auxiliary communication. As a result, in the upstream communication from the mobile terminal to the fixed base station, which is the main cause of the malfunction, the peripheral electronic devices are not disturbed. In addition, when the mobile terminal performs uplink communication,
By receiving downlink auxiliary communication from the relay station,
It is possible to identify the fixed base station that controls the existing relay station.
Wear. Therefore, the downlink communication areas of multiple fixed base stations
Destination for uplink communications sent by mobile terminals
Fixed base station and the fixed base that actually receives the upstream communication.
The situation of being different from the ground station will not occur, and it will surely move up and down.
Directional communication can be performed.

【００１６】[0016]

【００１７】[0017]

【００１８】[0018]

【００１９】[0019]

【００２０】第２の発明は、第１の発明に従属する発明
であって、中継局は、識別符号を、自局を管轄する固定
基地局から取得することを特徴とする。A second invention is according to the first invention, wherein the relay station obtains the identification code from a fixed base station which controls the own station.

【００２１】上記のように、第２の発明によれば、第１
の発明において、中継局は、識別符号を固定基地局から
取得するため、移動端末に対して常に動的な識別符号を
下り補助通信することができる。As described above, according to the second invention, the first
In the invention, since the relay station acquires the identification code from the fixed base station, the relay station can always perform the dynamic auxiliary identification code for the downlink auxiliary communication with the mobile terminal.

【００２２】第３の発明は、第１の発明に従属する発明
であって、中継局は、記憶手段をさらに備え、識別符号
を、当該記憶手段に予め格納していることを特徴とす
る。A third invention is an invention according to the first invention, wherein the relay station further comprises storage means, and the identification code is stored in advance in the storage means. Characterize.

【００２３】上記のように、第３の発明によれば、第１
の発明において、中継局は、識別符号を自ら備える記憶
手段に予め格納しているため、識別符号が不変的である
場合には、固定基地局との間の補助通信を行う必要がな
くなる。従って、固定基地局において中継局に対して補
助通信を行う手段、中継局において固定基地局から補助
通信を受信する手段、および固定基地局と中継局とを接
続するケーブルの芯数を削減することができる。As described above, according to the third invention, the first
In the invention, since the relay station stores the identification code in advance in the storage means provided therein, when the identification code is invariable, it is not necessary to perform auxiliary communication with the fixed base station. Therefore, the means for performing auxiliary communication to the relay station in the fixed base station, the means for receiving auxiliary communication from the fixed base station in the relay station, and reducing the number of cores of the cable connecting the fixed base station and the relay station You can

【００２４】第４の発明は、第１〜第３の発明に従属す
る発明であって、第１の無線伝送による下り通信のエリ
アが重なる複数の固定基地局を、一斉呼び出しエリアと
した場合、移動端末への着呼情報を、一斉呼び出しエリ
ア内の複数の固定基地局のすべてから下り制御通信にて
無線伝送することを特徴とする。A fourth invention is an invention according to the first to third inventions, wherein when a plurality of fixed base stations whose downlink communication areas by the first wireless transmission overlap each other are set as a paging area, It is characterized in that the incoming call information to the mobile terminal is wirelessly transmitted by downlink control communication from all of the plurality of fixed base stations in the paging area.

【００２５】上記のように、第４の発明によれば、第１
〜第３の発明において、移動端末は、待ち受け状態にお
いて、電波を伝送媒体とする複数の下り通信のエリア間
を移動した場合でも、異なる下り通信エリアに入るたび
に再度位置登録を行う必要がなくなる。As described above, according to the fourth invention, the first
-In the third invention, the mobile terminal does not need to re-register its position each time it enters a different downlink communication area even when moving between a plurality of downlink communication areas using radio waves as a transmission medium in the standby state. .

【００２６】第５の発明は、第１〜第４の発明に従属す
る発明であって、固定基地局は、中継局に対して行う補
助通信に、第１の無線伝送で行う移動端末に対する下り
通信の内容を含み、中継局は、移動端末に対する下り通
信を、赤外線等を伝送媒体とする第４の無線伝送で行う
手段をさらに備える。A fifth invention is an invention dependent on the first to fourth inventions, in which the fixed base station performs auxiliary communication for the relay station and downlink for the mobile terminal for the first radio transmission. wherein the content of the communication, the relay station, a downlink communication for the mobile terminal further comprises a row intends <br/> means at a fourth radio transmission to the transmission medium infrared rays or the like.

【００２７】上記のように、第５の発明によれば、第１
〜第４の発明において、中継局からも赤外線等を伝送媒
体として下り通信を行う。これにより、移動端末におい
て、固定基地局からの下り通信を受信する伝送媒体とし
て、電波または赤外線等のいずれかを選択的に用いるこ
とができる。As described above, according to the fifth invention, the first
In the fourth invention, downlink communication is also performed from the relay station using infrared rays or the like as a transmission medium. Thereby, in the mobile terminal, either radio waves or infrared rays can be selectively used as the transmission medium for receiving the downlink communication from the fixed base station.

【００２８】第６の発明は、第１〜第５の発明に従属す
る発明であって、固定基地局、中継局、および移動端末
相互間の上り通信および下り通信を、ＲＣＲＳＴＤ−２
８プロトコルに準じて行う。[0028] A sixth invention is an invention subordinate to the first to fifth inventions, in which uplink communication and downlink communication between a fixed base station, a relay station, and a mobile terminal are performed by RCRSTD-2.
8 Follow the protocol.

【００２９】上記のように、第６の発明は、第１〜第５
の発明を用いる典型的な通信プロトコルを示したもので
ある。As described above, the sixth invention is the first to fifth inventions.
FIG. 4 shows a typical communication protocol using the invention of FIG.

【００３０】第７の発明は、第６の発明に従属する発明
であって、ＲＣＲＳＴＤ−２８プロトコルで定められて
いる多重化方法ＴＤＭＡ／ＴＤＤを利用して、中継局が
移動端末に対して行う下り補助通信の送信を、第１の無
線伝送による下り通信区間の内、下り制御スロットを除
く下り通信スロット区間において、下り通信スロットと
同一のタイミングで行うことを特徴とする。A seventh invention is an invention subordinate to the sixth invention, and the relay station performs the mobile terminal for the mobile terminal by using the multiplexing method TDMA / TDD defined by the RCRSTD-28 protocol. transmission of downlink supplementary communication, first no
It is characterized in that it is performed at the same timing as the downlink communication slot in the downlink communication slot section excluding the downlink control slot in the downlink communication section by line transmission .

【００３１】上記のように、第７の発明によれば、第６
の発明において、待ち受け状態においても、通信状態に
おいても、移動端末が、電波を伝送媒体とする下り通信
と赤外線等を伝送媒体とする下り補助通信とを同時に受
信する必要がなくなる。これにより、電波を伝送媒体と
する下り通信の解析回路と、赤外線等を伝送媒体とする
下り補助通信の解析回路とを、共有化することができ
る。また、中継局においては、上り通信の受光期間中に
中継局が発光しないことより、中継局の受光感度を上げ
ることができる。As described above, according to the seventh aspect , the sixth aspect
In the invention described above, in both the standby state and the communication state, it is not necessary for the mobile terminal to simultaneously receive downlink communication using radio waves as a transmission medium and downlink auxiliary communication using infrared rays or the like as a transmission medium. Accordingly, the analysis circuit for downlink communication using radio waves as a transmission medium and the analysis circuit for downlink auxiliary communication using infrared rays or the like as a transmission medium can be shared. Further, in the relay station, since the relay station does not emit light during the light receiving period of the upstream communication, the light receiving sensitivity of the relay station can be increased.

【００３２】第８の発明は、複数の固定基地局と１つ以
上の移動端末との間の情報伝送を、複数の中継局を介し
て行う通信方法であって、固定基地局から移動端末への
下り方向の通信を、固定基地局が、移動端末に対する下
り通信を電波を伝送媒体とする第１の無線伝送で行い、
また、中継局に対する補助通信を有線伝送で行い、中継
局が、移動端末に対し、自局を管轄する固定基地局の識
別符号を含む下り補助通信を、赤外線等を伝送媒体とす
る第２の無線伝送で行うことで実現し、移動端末から固
定基地局への上り方向の通信を、移動端末が、中継局か
ら第２の無線伝送によって送信される下り補助通信を受
信して、通信対象とする当該中継局を管轄する固定基地
局を認識し、当該認識した固定基地局との通信を確立す
るように、当該中継局に対する上り通信を、赤外線等を
伝送媒体として第３の無線伝送で行い、中継局が、固定
基地局に対し、移動端末から受信した上り通信を、有線
伝送で送信することで実現する。An eighth aspect of the present invention is a communication method for transmitting information between a plurality of fixed base stations and one or more mobile terminals via a plurality of relay stations, wherein the fixed base stations transmit to the mobile terminals. In the downlink communication of, the fixed base station performs the downlink communication to the mobile terminal by the first wireless transmission using radio waves as a transmission medium,
In addition, the auxiliary communication is performed by wire transmission to the relay station so that the relay station can identify the mobile terminal as to the fixed base station that controls the mobile station .
It is realized by performing downlink auxiliary communication including another code by second wireless transmission using infrared rays or the like as a transmission medium, and uplink communication from the mobile terminal to the fixed base station is performed by the mobile terminal from the relay station to the base station . 2 receives the downlink auxiliary communication transmitted by wireless transmission, recognizes the fixed base station that controls the relay station to be communicated, and establishes communication with the recognized fixed base station. This is realized by performing upstream communication with the station by third wireless transmission using infrared rays or the like as a transmission medium, and the relay station transmitting the upstream communication received from the mobile terminal to the fixed base station by wired transmission.

【００３３】上記のように、第８の発明によれば、固定
基地局から移動端末への伝送媒体として電波を用いて下
り通信を行い、移動端末から固定基地局への伝送媒体と
して赤外線等を用いて上り通信を行う。さらに、中継局
を管轄する固定基地局の識別符号に関し、赤外線等を伝
送媒体に用いて下り補助通信を行う。これにより、誤動
作の主原因である移動端末から固定基地局へ向かう上り
通信において、周辺の電子機器に電波障害を与えること
がなくなる。さらに、移動端末は、上り通信を行うとき
に中継局からの下り補助通信を受信することで、近くに
存在する中継局を管轄する固定基地局を特定することが
できる。従って、複数の固定基地局の下り通信エリアが
重なったエリアで、移動端末が送信する上り通信の送り
先の固定基地局と、実際にその上り通信を受信する固定
基地局とが異なるという状況が生じなくなり、確実に上
下方向の通信を行うことができる。As described above, according to the eighth invention, downlink communication is performed using radio waves as a transmission medium from the fixed base station to the mobile terminal, and infrared rays or the like is used as the transmission medium from the mobile terminal to the fixed base station. Used for upstream communication. Furthermore, regarding the identification code of the fixed base station that controls the relay station, downlink auxiliary communication is performed using infrared rays or the like as a transmission medium. As a result, in the upstream communication from the mobile terminal to the fixed base station, which is the main cause of the malfunction, the peripheral electronic devices are not disturbed. Furthermore, the mobile terminal can specify a fixed base station that controls a relay station existing in the vicinity by receiving downlink auxiliary communication from the relay station when performing uplink communication. Therefore, in an area where the downlink communication areas of a plurality of fixed base stations overlap, a situation occurs in which the fixed base station that is the destination of the uplink communication transmitted by the mobile terminal and the fixed base station that actually receives the uplink communication are different. As a result, communication in the vertical direction can be reliably performed.

【００３４】[0034]

【００３５】[0035]

【００３６】第９の発明は、第８の発明に従属する発明
であって、中継局が、識別符号を、自局を管轄する固定
基地局から取得することを特徴とする。A ninth invention is according to the eighth invention, and is characterized in that the relay station obtains the identification code from a fixed base station which controls the own station.

【００３７】上記のように、第９の発明によれば、第８
の発明において、中継局が、識別符号を固定基地局から
取得するため、移動端末に対して常に動的な識別符号を
下り補助通信することができる。As described above, according to the ninth aspect , the eighth aspect
In the invention, since the relay station obtains the identification code from the fixed base station, it is possible to always perform dynamic auxiliary identification downlink downlink communication with the mobile terminal.

【００３８】第１０の発明は、第８の発明に従属する発
明であって、中継局が、識別符号を、備えている記憶手
段に予め格納していることを特徴とする。A tenth invention is an invention according to the eighth invention, characterized in that the relay station stores the identification code in advance in a storage means provided therein.

【００３９】上記のように、第１０の発明によれば、第
８の発明において、中継局が、識別符号を自ら備える記
憶手段に予め格納しているため、識別符号が不変的であ
る場合には、固定基地局との間の補助通信を行う必要が
なくなる。従って、この方法を用いる通信システムで
は、固定基地局において中継局に対して補助通信を行う
手段、中継局において固定基地局から補助通信を受信す
る手段、および固定基地局と中継局とを接続するケーブ
ルの芯数を削減することができる。As described above, according to the tenth invention,
In the eighth aspect of the invention, since the relay station stores the identification code in advance in the storage unit provided with itself, when the identification code is invariable, it is not necessary to perform auxiliary communication with the fixed base station. Therefore, in a communication system using this method, a fixed base station performs auxiliary communication to the relay station, a relay station receives auxiliary communication from the fixed base station, and the fixed base station and the relay station are connected. The number of cable cores can be reduced.

【００４０】第１１の発明は、第８〜第１０の発明に従
属する発明であって、第１の無線伝送による下り通信の
エリアが重なる複数の固定基地局を、一斉呼び出しエリ
アとした場合、移動端末への着呼情報を、一斉呼び出し
エリア内の複数の固定基地局のすべてから下り制御通信
にて無線伝送することを特徴とする。An eleventh invention is an invention dependent on the eighth to tenth inventions, wherein when a plurality of fixed base stations whose downlink communication areas by the first wireless transmission overlap each other are set as a paging area, It is characterized in that the incoming call information to the mobile terminal is wirelessly transmitted by downlink control communication from all of the plurality of fixed base stations in the paging area.

【００４１】上記のように、第１１の発明によれば、第
８〜第１０の発明において、移動端末が、待ち受け状態
において、電波を伝送媒体とする複数の下り通信のエリ
ア間を移動した場合でも、異なる下り通信エリアに入る
たびに再度位置登録を行う必要がなくなる。As described above, according to the eleventh invention,
In the eighth to tenth aspects, even when the mobile terminal moves between a plurality of downlink communication areas using radio waves as a transmission medium in a standby state, it is necessary to perform location registration again each time a mobile terminal enters a different downlink communication area. Disappear.

【００４２】第１２の発明は、第８〜第１１の発明に従
属する発明であって、固定基地局が中継局に対して行う
補助通信に、第１の無線伝送で行う移動端末に対する下
り通信の内容を含み、中継局が、移動端末に対する下り
通信を、赤外線等を伝送媒体とする第４の無線伝送でさ
らに行う。A twelfth aspect of the invention is an invention dependent on the eighth to eleventh aspects of the invention, wherein the fixed base station performs auxiliary communication to the relay station and downlink communication to the mobile terminal performed by the first wireless transmission. In addition, the relay station further performs downlink communication with the mobile terminal by the fourth wireless transmission using infrared rays or the like as a transmission medium.

【００４３】上記のように、第１２の発明によれば、第
８〜第１１の発明において、中継局からも赤外線等を伝
送媒体として下り通信を行う。これにより、移動端末に
おいて、固定基地局からの下り通信を受信する伝送媒体
として、電波または赤外線等のいずれかを選択的に用い
ることができる。As described above, according to the twelfth invention,
In the eighth to eleventh inventions, downlink communication is also performed from the relay station using infrared rays or the like as a transmission medium. Thereby, in the mobile terminal, either radio waves or infrared rays can be selectively used as the transmission medium for receiving the downlink communication from the fixed base station.

【００４４】第１３の発明は、第８〜第１２の発明に従
属する発明であって、固定基地局、中継局、および移動
端末相互間の上り通信および下り通信を、ＲＣＲＳＴＤ
−２８プロトコルに準じて行う。A thirteenth invention is an invention subordinate to the eighth to twelfth inventions, in which uplink communication and downlink communication between a fixed base station, a relay station, and a mobile terminal are performed by RCRSTD.
-28 protocol.

【００４５】上記のように、第１３の発明は、第８〜第
１２の発明を用いる典型的な通信プロトコルを示したも
のである。As described above, the thirteenth invention provides the eighth to eighth inventions.
13 illustrates a typical communication protocol using 12 inventions.

【００４６】第１４の発明は、第１３の発明に従属する
発明であって、ＲＣＲＳＴＤ−２８プロトコルで定めら
れている多重化方法ＴＤＭＡ／ＴＤＤを利用して、中継
局が移動端末に対して行う下り補助通信の送信を、第１
の無線伝送による下り通信区間の内、下り制御スロット
を除く下り通信スロット区間において、下り通信スロッ
トと同一のタイミングで行うことを特徴とする。A fourteenth invention is an invention subordinate to the thirteenth invention, wherein the relay station performs the mobile terminal using the multiplexing method TDMA / TDD defined by the RCRSTD-28 protocol. 1st transmission of downlink auxiliary communication
In the downlink communication slot section other than the downlink control slot in the downlink communication section by wireless transmission of 1), it is performed at the same timing as the downlink communication slot.

【００４７】上記のように、第１４の発明によれば、第
１３の発明において、待ち受け状態においても、通信状
態においても、移動端末が、電波を伝送媒体とする下り
通信と赤外線等を伝送媒体とする下り補助通信とを同時
に受信する必要がなくなる。これにより、電波を伝送媒
体とする下り通信の解析回路と、赤外線等を伝送媒体と
する下り補助通信の解析回路とを、共有化することがで
きる。また、中継局においては、上り通信の受光期間中
に中継局が発光しないことより、中継局の受光感度を上
げることができる。As described above, according to the fourteenth invention,
In the thirteenth invention, the mobile terminal does not need to simultaneously receive the downlink communication using the radio wave as the transmission medium and the downlink auxiliary communication using the infrared ray or the like as the transmission medium in both the standby state and the communication state. Accordingly, the analysis circuit for downlink communication using radio waves as a transmission medium and the analysis circuit for downlink auxiliary communication using infrared rays or the like as a transmission medium can be shared. Further, in the relay station, since the relay station does not emit light during the light receiving period of the upstream communication, the light receiving sensitivity of the relay station can be increased.

【００４８】[0048]

【発明の実施の形態】図１は、本発明の一実施形態に係
る通信システムの構成を示す図である。図１において、
本発明の一実施形態に係る通信システムは、移動端末１
と、固定基地局群２，３と、通信網４とから構成され
る。1 is a diagram showing the configuration of a communication system according to an embodiment of the present invention. In FIG.
A communication system according to an embodiment of the present invention is a mobile terminal 1
And the fixed base station groups 2 and 3 and the communication network 4.

【００４９】移動端末１は、移動可能な端末装置であっ
て、内蔵または接続される光送受信部１１と電波受信部
１２とを備える。光送受信部１１は、発光部ａと受光部
ｂとを有しており、赤外線等６０を伝送媒体とした通信
を送信および受信する。固定基地局群２は、固定基地局
２０と、固定基地局２０の下り通信エリア内に分散して
設置される複数の中継局２１〜２Ｎとを備え、双方をケ
ーブル７１で接続している。固定基地局群３は、固定基
地局３０と、固定基地局３０の下り通信エリア内に分散
して設置される複数の中継局３１〜３Ｎとを備え、双方
をケーブル７３で接続している。また、固定基地局２
０，３０は、下り通信を行う電波送信部と、ケーブル７
１，７３を介して中継局２１〜２Ｎ，３１〜３Ｎから伝
送されてくる上り通信を受信する受信部と、ケーブル７
２，７４を介して補助情報（後述する）を中継局２１〜
２Ｎ，３１〜３Ｎに伝送するための情報送信部とを、そ
れぞれ備える（いずれも図示せず）。さらに、中継局２
１〜２Ｎ，３１〜３Ｎは、通信内容を赤外線等６０を伝
送媒体として送信する発光部ａと、赤外線等６０を伝送
媒体として送信されてきた通信内容を受信する受光部ｂ
と、固定基地局２０，３０との間でケーブル７１，７３
を使って通信するための送信部および受信部（図示せ
ず）とを、それぞれ備える。また、固定基地局２０と固
定基地局３０とは、通信網４を介してケーブル７２，７
４で相互に接続されている。The mobile terminal 1 is a movable terminal device and includes an optical transmitter / receiver 11 and a radio wave receiver 12 which are built in or connected to each other. The optical transmission / reception unit 11 includes a light emitting unit a and a light receiving unit b, and transmits and receives communication using infrared rays 60 as a transmission medium. The fixed base station group 2 includes the fixed base station 20 and a plurality of relay stations 21 to 2N that are dispersedly installed in the downlink communication area of the fixed base station 20, and both are connected by a cable 71. The fixed base station group 3 includes a fixed base station 30 and a plurality of relay stations 31 to 3N that are dispersedly installed in the downlink communication area of the fixed base station 30, and both are connected by a cable 73. In addition, the fixed base station 2
Reference numerals 0 and 30 denote a radio wave transmission unit for performing downlink communication and a cable 7
A receiving unit for receiving the upstream communication transmitted from the relay stations 21 to 2N and 31 to 3N via the cables 1, 73 and the cable 7
Auxiliary information (to be described later) is transmitted via relay stations 21 to 21 via 2, 74.
2N, 31 to 3N, and an information transmitting unit for transmitting to each (not shown). Furthermore, relay station 2
1 to 2N and 31 to 3N are a light emitting unit a that transmits the communication content using infrared rays 60 or the like as a transmission medium, and a light receiving unit b that receives the communication content transmitted using the infrared rays 60 or the like as a transmission medium.
And cables 71 and 73 between the fixed base stations 20 and 30.
A transmitter and a receiver (not shown) for communicating with each other are provided. Further, the fixed base station 20 and the fixed base station 30 are connected via the communication network 4 to the cables 72, 7
4 are connected to each other.

【００５０】以下、上記構成による本発明の一実施形態
に係る通信システムにおける通信方法を、図１を参照し
つつ説明する。なお、図１においては、移動端末１が、
通信エリアＺ２０内で固定基地局２０に対して位置登録
をした後、重複通信エリアＺ２０３０に移動した場合を
想定している。また、下り通信エリアが重なる固定基地
局は、一斉呼び出しエリアとし、一斉呼び出しエリア内
にある全ての固定基地局から着呼情報を下り制御通信で
伝送することとする。A communication method in the communication system according to the embodiment of the present invention having the above configuration will be described below with reference to FIG. In addition, in FIG. 1, the mobile terminal 1 is
It is assumed that the location is registered with respect to the fixed base station 20 in the communication area Z20 and then the location moves to the overlapping communication area Z2030. In addition, fixed base stations whose downlink communication areas overlap each other are called paging areas, and incoming call information is transmitted by downlink control communication from all the fixed base stations in the paging area.

【００５１】まず、固定基地局２０，３０から移動端末
１への下り通信は、次のようにして行われる。固定基地
局２０，３０は、下り通信の伝送媒体として、従来と同
様に電波５２，５３を用いて移動端末１に対して通信を
行う。その一方、固定基地局２０，３０は、ケーブル７
１，７３を介して、各々の通信エリアＺ２０，Ｚ３０に
関する補助情報を中継局２１〜２Ｎ，３１〜３Ｎへそれ
ぞれ送信する。この補助情報は、中継局が有線接続され
ている、すなわち中継局を管轄する固定基地局を識別で
きる情報であり、例えば、固定基地局識別符号である。
そして、中継局２１〜２Ｎ，３１〜３Ｎは、固定基地局
２０，３０からそれぞれ受けた補助情報を、赤外線等６
０を伝送媒体とし下り補助通信として常時送信する。First, the downlink communication from the fixed base stations 20 and 30 to the mobile terminal 1 is performed as follows. The fixed base stations 20 and 30 communicate with the mobile terminal 1 using the radio waves 52 and 53 as a transmission medium for downlink communication as in the conventional case. On the other hand, the fixed base stations 20 and 30 are connected to the cable 7
Auxiliary information regarding each of the communication areas Z20 and Z30 is transmitted to the relay stations 21 to 2N and 31 to 3N via 1, 73 respectively. This auxiliary information is information that allows the relay station to be connected by wire, that is, to identify the fixed base station that controls the relay station, and is, for example, a fixed base station identification code.
Then, the relay stations 21 to 2N and 31 to 3N receive the auxiliary information received from the fixed base stations 20 and 30, respectively, by infrared rays 6 or the like.
0 is used as a transmission medium and is always transmitted as downlink auxiliary communication.

【００５２】次に、移動端末１から固定基地局２０，３
０への上り通信は、次のようにして行われる。移動端末
１は、通信実施に先立って、まず光送受信部１１の受光
部ｂによって近くに存在する中継局が送信する下り補助
通信を受信する。これにより、移動端末１は、この受信
した下り補助通信の補助情報から近くに存在する中継局
を管轄する固定基地局の認識番号情報を取得する。例え
ば、図１において、移動端末１は、受信した下り補助通
信が中継局３１からの通信だった場合、固定基地局３０
の認識番号情報を得ることができるのである。そして、
移動端末１は、下り補助通信によって最後に位置登録し
た固定基地局２０とは異なる新しい固定基地局３０の通
信エリアＺ３０に移動したことを認識すると、下り制御
通信を受信するタイミングを当該新しい固定基地局３０
の下り制御通信のタイミングに合わせる。また、移動端
末１が最後に位置登録を行った一斉呼び出しエリア外の
固定基地局の下り通信エリアに移動した場合、移動端末
１は、受信した下り補助通信から、近くに存在する中継
局を管轄する固定基地局を識別し、この固定基地局に対
し位置登録を行う。なお、下り補助通信が受信できない
状態の時は、上り通信も行えない状態であると判断し、
位置登録は行わない。Next, from the mobile terminal 1 to the fixed base stations 20, 3
Uplink communication to 0 is performed as follows. Prior to carrying out communication, the mobile terminal 1 first receives downlink auxiliary communication transmitted by a relay station located nearby by the light receiving unit b of the optical transmission / reception unit 11. As a result, the mobile terminal 1 obtains the identification number information of the fixed base station that manages the relay station located nearby from the received auxiliary information of the downlink auxiliary communication. For example, in FIG. 1, when the downlink auxiliary communication received is the communication from the relay station 31, the mobile terminal 1 uses the fixed base station 30.
It is possible to obtain the identification number information of. And
When the mobile terminal 1 recognizes that it has moved to the communication area Z30 of the new fixed base station 30 different from the fixed base station 20 that was last registered by the downlink auxiliary communication, the mobile terminal 1 sets the timing for receiving the downlink control communication to the new fixed base station. Station 30
It matches the timing of downlink control communication. In addition, when the mobile terminal 1 moves to the downlink communication area of the fixed base station outside the paging area in which the location registration was last performed, the mobile terminal 1 manages the relay station existing in the vicinity from the received downlink auxiliary communication. The fixed base station to be registered is identified, and the location registration is performed for this fixed base station. When the downlink auxiliary communication cannot be received, it is determined that the uplink communication cannot be performed,
No location registration is done.

【００５３】ここで、下り補助通信の送信は、常時行っ
てもよいが、例えば、通信がＰＨＳのＲＣＲＳＴＤ−２
８プロトコルに準ずるような場合には、以下に示す送信
タイミングを用いることが可能である。図２を参照す
る。ＲＣＲＳＴＤ−２８プロトコルで定められている多
重化方法ＴＤＭＡ(Time Division Multiple Access) ／
ＴＤＤ(Time Division Duplex)を利用して、電波による
下り通信区間（Ｔ１からＴ４の区間）の内、下り制御用
スロット（Ｔ１）を除く下り通信用スロット（Ｔ２〜Ｔ
４）の１．８７５ｍｓ（＝０．６２５ｍｓ×３）の区間
で、下り通信用スロット（Ｔ２〜Ｔ４）と同じタイミン
グで０．６２５ｍｓ毎に３回、中継局より下り補助通信
（Ｈ１）を伝送する。これにより、待ち受け状態および
通信状態のいずれにおいても、移動端末が、電波による
下り通信と赤外線等による下り補助通信とを同時に受信
する必要が無くなり、双方の通信を解析する解析回路を
共有化することができる。また、上り通信の期間（Ｒ１
〜Ｒ４）中は、中継局の受光期間であり、この期間中に
中継局が発光しないことより、中継局の受光感度を上げ
ることができる。Here, although the downlink auxiliary communication may be transmitted at all times, for example, the communication is PHS RCRSTD-2.
In the case of conforming to the 8 protocols, the transmission timings shown below can be used. Please refer to FIG. Multiplexing method defined by RCRSTD-28 protocol TDMA (Time Division Multiple Access) /
By using TDD (Time Division Duplex), downlink communication slots (T2 to T4) excluding the downlink control slot (T1) in the downlink communication section (section from T1 to T4) by radio waves
4) In the 1.875 ms (= 0.625 ms × 3) section, the downlink auxiliary communication (H1) is transmitted from the relay station three times every 0.625 ms at the same timing as the downlink communication slots (T2 to T4). To do. This eliminates the need for the mobile terminal to simultaneously receive downlink communication by radio waves and downlink auxiliary communication by infrared rays or the like in both the standby state and the communication state, and to share an analysis circuit for analyzing both communications. You can In addition, the upstream communication period (R1
Up to R4) is the light receiving period of the relay station. Since the relay station does not emit light during this period, the light receiving sensitivity of the relay station can be increased.

【００５４】上記のように、移動端末１は、通信に使用
する中継局３１を管轄する固定基地局３０を判断した
後、固定基地局３０に対して通信が確立されるように、
伝送媒体として赤外線等６０を用いて、発光部ａから中
継局３１に対して上り通信を行う。そして、中継局３１
は、移動端末１から受信した上り通信の内容をケーブル
７３を介して固定基地局３０へ送信する。As described above, the mobile terminal 1 determines the fixed base station 30 which controls the relay station 31 used for communication, and then establishes communication with the fixed base station 30.
Uplink communication is performed from the light emitting unit a to the relay station 31 by using infrared rays 60 or the like as a transmission medium. And the relay station 31
Transmits the content of the uplink communication received from the mobile terminal 1 to the fixed base station 30 via the cable 73.

【００５５】次に、本発明の一実施形態に係る通信シス
テムにおける通信方法を、図１を参照しつつ具体例を挙
げてさらに説明する。まず、移動端末１が固定基地局２
０に対して位置登録をした後で、ユーザが移動端末１を
ポケットやカバンに入れて赤外線等による下り補助通信
を受信できない状態で重複通信エリアＺ２０３０まで移
動し、そしてこの場所で移動端末１を使って電話をかけ
る場合を考える。この場合、ユーザは、まずポケットや
カバンから移動端末１を取り出し、電話をかけようとす
る相手の電話番号を移動端末１に入力する操作を行う。
ここで、中継局３１からは、上述のように（例えば、５
ｍｓ毎に）下り補助通信を送信されている。従って、ユ
ーザが電話番号の入力操作を完了するまでに、移動端末
１は、近くに存在する中継局３１からの下り補助通信を
受信し、補助情報からこの中継局３１を管轄する固定基
地局３０の認識番号情報を得ることができる。これによ
り、移動端末１は、近くに存在する中継局３１を管轄す
る固定基地局３０に対し確実に発呼情報を送信すること
ができ、上りおよび下りの双方向通信を実現する。な
お、ユーザが下り補助通信を受信できる状態で移動端末
１を持ち歩いている場合には、移動端末１は、常に通信
可能な固定基地局を認識しているため、通信の際は、通
信可能な固定基地局２０または３０に対し発呼情報を送
信することができるのは言うまでもない。Next, the communication method in the communication system according to one embodiment of the present invention will be further described with reference to FIG. First, the mobile terminal 1 is the fixed base station 2
After registering the location with respect to 0, the user moves the mobile terminal 1 to the overlapping communication area Z2030 in a state where he / she cannot put the mobile terminal 1 in a pocket or a bag to receive downlink auxiliary communication by infrared rays and the mobile terminal 1 is moved to this location. Consider the case of making a call using. In this case, the user first takes out the mobile terminal 1 from the pocket or bag and performs the operation of inputting into the mobile terminal 1 the telephone number of the person who is going to make a call.
Here, from the relay station 31, as described above (for example, 5
Downlink auxiliary communication is sent (every ms). Therefore, by the time the user completes the input operation of the telephone number, the mobile terminal 1 receives the downlink auxiliary communication from the relay station 31 existing nearby, and from the auxiliary information, the fixed base station 30 which manages this relay station 31. It is possible to obtain the identification number information of. As a result, the mobile terminal 1 can reliably transmit the calling information to the fixed base station 30 that manages the relay station 31 that is present in the vicinity, and realizes the up and down bidirectional communication. In addition, when the user carries the mobile terminal 1 in a state of being able to receive downlink auxiliary communication, the mobile terminal 1 always recognizes a fixed base station with which communication is possible, and therefore communication is possible during communication. It goes without saying that the calling information can be transmitted to the fixed base station 20 or 30.

【００５６】次に、移動端末１が固定基地局２０に対し
て位置登録をした後で、ユーザが移動端末１をポケット
やカバンに入れて赤外線等による下り補助通信を受信で
きない状態で重複通信エリアＺ２０３０まで移動し、そ
してこの場所で移動端末１に電話がかかってきた場合を
考える。この場合、ユーザは、着信音が鳴って電話がか
かってきたことを認知すると、ポケットやカバンから移
動端末１を取り出す。そうすると、ポケットやカバンか
ら移動端末１が取り出された時点から、近くに存在する
中継局３１からの下り補助通信を受信可能となり、補助
情報からこの中継局３１を管轄する固定基地局３０の認
識番号情報を得ることができる。これにより、移動端末
１は、近くに存在する中継局３１を管轄する固定基地局
３０に対し確実に発呼情報を送信することができ、上り
および下りの双方向通信を実現する。なお、ユーザが下
り補助通信を受信できる状態で移動端末１を持ち歩いて
いる場合には、移動端末１は、常に通信可能な固定基地
局を認識しているため、通信の際は、通信可能な固定基
地局２０または３０に対し発呼情報を送信することがで
きるのは言うまでもない。Next, after the mobile terminal 1 has registered its location with the fixed base station 20, the user puts the mobile terminal 1 in a pocket or bag and cannot receive downlink auxiliary communication by infrared rays or the like in the overlapping communication area. Consider the case where the mobile terminal 1 has moved to Z2030 and a call is made to the mobile terminal 1 at this location. In this case, when the user recognizes that the incoming call is sounding and the call is received, the user takes out the mobile terminal 1 from the pocket or the bag. Then, from the time when the mobile terminal 1 is taken out from the pocket or bag, it becomes possible to receive the downlink auxiliary communication from the nearby relay station 31, and from the auxiliary information, the identification number of the fixed base station 30 that manages this relay station 31. You can get information. As a result, the mobile terminal 1 can reliably transmit the calling information to the fixed base station 30 that manages the relay station 31 that is present in the vicinity, and realizes the up and down bidirectional communication. In addition, when the user carries the mobile terminal 1 in a state of being able to receive downlink auxiliary communication, the mobile terminal 1 always recognizes a fixed base station with which communication is possible, and therefore communication is possible during communication. It goes without saying that the calling information can be transmitted to the fixed base station 20 or 30.

【００５７】ここで、移動端末１に電話がかかってきた
場合には、さらに以下のような制御を行うことが可能で
ある。固定基地局２０または３０より移動端末１に着呼
信号が送られた時、移動端末１は、正規の着信音とは異
なる音で鳴動を始め、ユーザに電話がかかってきたこと
をまず通知する。次に、ユーザが電話がかかってきたこ
とを認知してポケットやカバン等から移動端末１を取り
出した後、移動端末１は、受信する下り補助通信に基づ
いてそのエリアで通信できる固定基地局２０または３０
を確認して、当該固定基地局２０または３０に着呼応答
情報を送信する。そして、上りと下りの通信リンクが確
立した時点で、移動端末１は、正規の着信音で鳴動を始
める。Here, when a call is made to the mobile terminal 1, the following control can be further performed. When an incoming call signal is sent from the fixed base station 20 or 30 to the mobile terminal 1, the mobile terminal 1 starts ringing with a sound different from the regular ring tone, and first notifies the user that an incoming call has been made. . Next, after the user recognizes that the call is received and takes out the mobile terminal 1 from the pocket, the bag or the like, the mobile terminal 1 can communicate in the area based on the received downlink auxiliary communication. Or 30
Is confirmed and the incoming call response information is transmitted to the fixed base station 20 or 30. Then, when the uplink and downlink communication links are established, the mobile terminal 1 starts ringing with a regular ring tone.

【００５８】最後に、移動端末１が通話しながら通話中
の固定基地局２０の通信エリアＺ２０から、通話相手と
異なる固定基地局３０の通信エリアＺ３０に移動した場
合を考える。この場合、移動端末１は、当初下り補助通
信において通話中の固定基地局２０の識別符号を受信し
ていたが、移動端末１が移動することにより徐々に固定
基地局２０の識別符号が受信できなくなる。そして、そ
のまま移動を続けることにより、移動端末１は、これま
での通話相手とは異なる固定基地局３０の識別符号を受
信し始める。この時、移動端末１は、固定基地局３０に
対し（例えば、ＲＣＲＳＴＤ−２８プロトコルの場合、
異なるＣＳへの）通話中チャネルの切替動作を行うこと
により、再び通話が可能となる。Finally, let us consider a case where the mobile terminal 1 moves from the communication area Z20 of the fixed base station 20 during a call to another communication area Z30 of the fixed base station 30 different from the other party of the call. In this case, the mobile terminal 1 initially received the identification code of the fixed base station 20 during the call in the downlink auxiliary communication, but as the mobile terminal 1 moves, the mobile terminal 1 can gradually receive the identification code of the fixed base station 20. Disappear. Then, by continuing to move as it is, the mobile terminal 1 starts to receive the identification code of the fixed base station 30 different from that of the other party. At this time, the mobile terminal 1 transmits to the fixed base station 30 (for example, in the case of the RCRSTD-28 protocol,
A call can be made again by performing a switching operation of a channel during a call (to a different CS).

【００５９】以上のように、本発明の一実施形態に係る
通信システムによれば、固定基地局から移動端末への伝
送媒体として電波を利用して下り通信を行い、移動端末
から固定基地局への伝送媒体として赤外線等を利用して
上り通信を行う。さらに、中継局を管轄する固定基地局
を識別できる補助情報に関し、赤外線等を伝送媒体に利
用して下り補助通信を行う。これにより、移動端末は、
上り通信を行うときに中継局からの下り補助通信を受信
することで、近くに存在する中継局を管轄する固定基地
局を特定することができる。従って、複数の固定基地局
の下り通信エリアが重なったエリアで、移動端末が送信
する上り通信の送り先の固定基地局と、実際にその上り
通信を受信する固定基地局とが異なるという状況が生じ
なくなり、確実に上下方向の通信を行うことができる。As described above, according to the communication system of the embodiment of the present invention, downlink communication is performed by using radio waves as a transmission medium from the fixed base station to the mobile terminal, and the mobile terminal transfers to the fixed base station. Infrared or the like is used as a transmission medium for the uplink communication. Further, regarding auxiliary information that can identify a fixed base station that controls a relay station, downlink auxiliary communication is performed using infrared rays or the like as a transmission medium. This allows the mobile terminal to
By receiving the downlink auxiliary communication from the relay station when performing the uplink communication, it is possible to specify the fixed base station that controls the relay station existing in the vicinity. Therefore, in an area where the downlink communication areas of a plurality of fixed base stations overlap, a situation occurs in which the fixed base station that is the destination of the uplink communication transmitted by the mobile terminal and the fixed base station that actually receives the uplink communication are different. As a result, communication in the vertical direction can be reliably performed.

【００６０】なお、上記一実施形態に係る通信システム
では、１つの移動端末１と２つの固定基地局群２，３と
で構成された場合を一例に挙げて説明したが、２つ以上
の移動端末や３つ以上の固定基地局群が存在する場合で
あっても、上述したとおりの効果を奏することは言うま
でもない。In the communication system according to the above embodiment, the case where one mobile terminal 1 and two fixed base station groups 2 and 3 are used has been described as an example. Needless to say, even when there are terminals and a group of three or more fixed base stations, the same effects as described above can be obtained.

【００６１】また、上記一実施形態に係る通信システム
では、固定基地局２０，３０が補助情報を有しており、
固定基地局２０，３０がケーブル７１，７３を介して各
中継局２１〜２Ｎ，３１〜３Ｎに補助情報を送信するよ
うに記載した。しかし、補助情報が固定基地局識別符号
のように固定的な情報である場合には、各中継局２１〜
２Ｎ，３１〜３Ｎに記憶装置を設け、その記憶装置内に
予め補助情報を記憶させておいてもよい。この場合、固
定基地局２０，３０から各中継局２１〜２Ｎ，３１〜３
Ｎに補助情報を送信する必要がなくなり、固定基地局２
０，３０の情報送信部を削除することができ、また固定
基地局２０，３０と各中継局２１〜２Ｎ，３１〜３Ｎと
を接続するケーブル７１，７３の芯数を削減することが
できる。In the communication system according to the above embodiment, the fixed base stations 20 and 30 have auxiliary information,
It has been described that the fixed base stations 20 and 30 transmit auxiliary information to the relay stations 21 to 2N and 31 to 3N via the cables 71 and 73. However, when the auxiliary information is fixed information such as a fixed base station identification code, each relay station 21-
A storage device may be provided in 2N, 31 to 3N, and auxiliary information may be stored in advance in the storage device. In this case, the fixed base stations 20 and 30 are connected to the relay stations 21 to 2N and 31 to 3 respectively.
Since it is not necessary to send auxiliary information to N, the fixed base station 2
It is possible to eliminate the information transmission units of 0 and 30 and reduce the number of cores of the cables 71 and 73 that connect the fixed base stations 20 and 30 and the relay stations 21 to 2N and 31 to 3N.

【００６２】さらに、上記一実施形態に係る通信システ
ムでは、下り通信の伝送媒体として従来と同様の電波を
用いたが、各中継局２１〜２Ｎ，３１〜３Ｎの発光部ａ
からの赤外線等による通信を下り補助通信だけに用いる
のではなく、通常の下り通信にも用いることが可能であ
る。また、下り通信の伝送媒体として、電波と赤外線等
とを選択的に用いることができるようにすることも可能
である。Further, in the communication system according to the above-described embodiment, the same radio wave as the conventional one is used as the transmission medium for the downlink communication, but the light emitting parts a of the relay stations 21 to 2N and 31 to 3N are used.
It is possible not only to use the infrared ray communication from the above for the downlink auxiliary communication, but also to use the normal downlink communication. It is also possible to selectively use radio waves, infrared rays, or the like as transmission media for downlink communication.

[Brief description of drawings]

【図１】本発明の一実施形態に係る通信システムの構成
を示す図である。FIG. 1 is a diagram showing a configuration of a communication system according to an embodiment of the present invention.

【図２】通信がＰＨＳのＲＣＲＳＴＤ−２８プロトコル
に準ずる場合の通信タイミングの一例を示す図である。FIG. 2 is a diagram showing an example of communication timing in the case where communication conforms to the PHS RCRSTD-28 protocol.

【図３】先出願の技術に係る通信システムの構成の一例
を示す図である。FIG. 3 is a diagram showing an example of a configuration of a communication system according to the technology of the prior application.

【図４】先出願の技術に係る通信システムにおいて残っ
ている問題点を説明するための図である。FIG. 4 is a diagram for explaining a problem remaining in the communication system according to the technology of the prior application.

[Explanation of symbols]

１，１０１…移動端末２，３，１０２，１０３…固定基地局群４，１０４…通信網１１…光送受信部１２，１１２…電波受信部２０，３０，１２０，１３０…固定基地局２１〜２１Ｎ，３１〜３Ｎ…中継局５２，５３，１５２，１５３…電波６０，１６２…赤外線等７１〜７４，１７１〜１７３…ケーブル１１１…光送信部１２１〜１２Ｎ，１３１〜１３Ｎ…光受信部３００…固定端末Ｈ１…下り補助通信用スロットＲ１〜Ｒ４…上り通信用スロットＴ１〜Ｔ４…下り通信用スロットＺ２０，Ｚ３０，Ｚ１２０，Ｚ１３０…通信エリアＺ２０３０，Ｚ１２０１３０…重複通信エリア 1, 101 ... Mobile terminal 2, 3, 102, 103 ... Fixed base station group 4, 104 ... Communication network 11 ... Optical transceiver 12, 112 ... Radio wave receiver 20, 30, 120, 130 ... Fixed base station 21-21N, 31-3N ... Relay station 52, 53, 152, 153 ... Radio waves 60, 162 ... Infrared rays, etc. 71-74, 171-173 ... Cable 111 ... Optical transmitter 121-12N, 131-13N ... Optical receiver 300 ... Fixed terminal H1 ... Down auxiliary communication slot R1 to R4 ... Uplink communication slots T1 to T4 ... Downlink communication slots Z20, Z30, Z120, Z130 ... Communication area Z2030, Z120130 ... Overlapping communication area

───────────────────────────────────────────────────── フロントページの続き (72)発明者森岡正朋広島県東広島市鏡山３丁目10番18号株式会社松下電器情報システム広島研究所内 (72)発明者小田原壮神奈川県横浜市港北区綱島東４丁目３番１号松下通信工業株式会社内 (72)発明者田島公博東京都新宿区西新宿三丁目19番２号日本電信電話株式会社内 (56)参考文献特開平10−145290（ＪＰ，Ａ) 特開平２−235447（ＪＰ，Ａ) 特開昭63−48023（ＪＰ，Ａ) (58)調査した分野(Int.Cl.⁷，ＤＢ名) H04B 7/24 - 7/26 102 H04Q 7/00 - 7/38 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatomo Morioka 3-10-18 Kagamiyama, Higashihiroshima City, Hiroshima Prefecture Matsushita Electric Information Systems Hiroshima Laboratory, Ltd. (72) Inventor Sohda Odawara Kohoku Ward, Yokohama Tsunashima Higashi 4-3-1 Matsushita Communication Industrial Co., Ltd. (72) Inventor Kimihiro Tajima 3-19-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Nihon Telegraph and Telephone Corporation (56) Reference JP 10- 145290 (JP, A) JP-A-2-235447 (JP, A) JP-A-63-48023 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04B 7/24-7 / 26 102 H04Q 7/00-7/38

Claims

(57) [Claims]

1. A communication system for transmitting information between a plurality of fixed base stations and one or more mobile terminals via a plurality of relay stations, wherein the fixed base station is a downlink for the mobile terminals. Communication uses radio waves as the transmission medium
Means for performing first wireless transmission and means for performing auxiliary communication to the relay station by wire transmission
And means for receiving the upstream communication transmitted from the relay station,
And the relay station receives the auxiliary communication transmitted from the fixed base station.
And the mobile terminal is connected to its own station (below.
Including the identification code of the fixed base station
Downlink auxiliary communication can be performed using optical signals such as infrared rays, visible rays, and ultraviolet rays.
Using electromagnetic waves (hereinafter referred to as infrared rays) as a transmission medium
2 by means of wireless transmission and a third wireless transmission using infrared rays or the like as a transmission medium
Means for receiving uplink communication transmitted from a mobile terminal, and uplink communication received from the mobile terminal, the fixed base station
Means for transmitting by wire transmission to the mobile terminal, the mobile terminal transmitting by the first wireless transmission from the fixed base station.
Means for receiving downstream communication, and transmitted from the relay station by the second wireless transmission
Receive the downlink auxiliary communication and select the relay station to be the communication target.
Means for recognizing the fixed base station under its jurisdiction and establishing communication with the recognized fixed base station,
Uplink communication to the relay station is performed by the third wireless transmission.
Means for performing downlink communication from the fixed base station to the mobile terminal, the first wireless transmission, the wired transmission and the second transmission.
And wireless communication of the mobile terminal to upstream communication from the fixed base station to the third wireless transmission and the wired transmission .
Communications system.

2. The communication system according to claim 1 , wherein the relay station acquires the identification code from the fixed base station that controls the own station.

3. The relay station further comprises storage means,
The communication system according to claim 1 , wherein the identification code is stored in advance in the storage means.

4. When a plurality of said fixed base stations whose downlink communication areas are overlapped by said first wireless transmission are set as a paging area, incoming call information to said mobile terminal is set as a plurality of paging areas in said paging area. characterized in that said wirelessly transmitting from all of the fixed base station in the downlink control communication, a communication system according to any one of claims 1 to 3.

5. The fixed base station includes, in auxiliary communication performed with the relay station, contents of downlink communication with the mobile terminal performed with the first radio transmission, and the relay station with respect to the mobile terminal. the downlink communication, further comprising a row cormorants means at a fourth radio transmission to the transmission medium infrared rays or the like, a communication system according to claim 1.

6. RCR is used for uplink communication and downlink communication among the fixed base station, the relay station, and the mobile terminal.
The communication system according to any one of claims 1 to 5 , which is performed according to the STD-28 protocol.

7. The transmission of downlink auxiliary communication performed by the relay station to the mobile terminal by using the multiplexing method TDMA / TDD defined by the RCRSTD-28 protocol, by the first wireless transmission. Of the downlink communication section,
The communication system according to claim 6 , wherein the communication is performed at the same timing as the downlink communication slot in the downlink communication slot section excluding the downlink control slot.

8. A communication method for transmitting information between a plurality of fixed base stations and one or more mobile terminals via a plurality of relay stations, comprising: downlink from the fixed base stations to the mobile terminals. Direction communication, the fixed base station performs downlink communication to the mobile terminal by first wireless transmission using radio waves as a transmission medium, and also performs auxiliary communication to the relay station by wire transmission, and the relay station the relative mobile terminal, which is connected between the own station (hereinafter, jurisdiction to that) identification of said fixed base station
This is realized by performing downlink auxiliary communication including another code by second wireless transmission using an optical electromagnetic wave (hereinafter, referred to as infrared ray or the like) such as infrared ray, visible ray, or ultraviolet ray as a transmission medium. The mobile terminal receives uplink auxiliary communication transmitted by the second wireless transmission from the relay station for upstream communication to the fixed base station, and the mobile terminal manages the relay station as a communication target. To recognize the base station and establish communication with the recognized fixed base station, uplink communication to the relay station is performed using infrared rays or the like as a transmission medium.
A communication method, which is performed by third wireless transmission and is realized by the relay station transmitting the uplink communication received from the mobile terminal to the fixed base station by wire transmission.

9. The communication method according to claim 8 , wherein the relay station acquires the identification code from the fixed base station that manages the own station.

10. The relay station stores the identification code in advance in a storage means provided therein.
The communication method according to claim 8 .

11. When a plurality of said fixed base stations whose downlink communication areas by said first wireless transmission overlap are used as a paging area, incoming call information to said mobile terminal is stored in a plurality of paging areas within said paging area. 11. The communication method according to claim 8 , wherein wireless transmission is performed by downlink control communication from all of the fixed base stations.

12. The auxiliary communication performed by the fixed base station with respect to the relay station includes contents of downlink communication performed with respect to the mobile terminal by the first wireless transmission, and the relay station performs downlink communication with respect to the mobile terminal. The communication method according to any one of claims 8 to 11 , wherein communication is further performed by fourth wireless transmission using infrared rays or the like as a transmission medium.

13. Uplink communication and downlink communication among the fixed base station, the relay station, and the mobile terminal are controlled by RC.
Performed according to RSTD-28 protocol, claim 8-1
2. The communication method according to any one of 2 .

14. Transmission of downlink auxiliary communication performed by the relay station to the mobile terminal by using the multiplexing method TDMA / TDD defined by the RCRSTD-28 protocol by the first wireless transmission. Of the downlink communication section,
14. The communication method according to claim 13 , wherein the communication is performed at the same timing as the downlink communication slot in the downlink communication slot section excluding the downlink control slot.