JP2000308122A - Radio system - Google Patents

Radio system

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Publication number
JP2000308122A
JP2000308122A JP11108559A JP10855999A JP2000308122A JP 2000308122 A JP2000308122 A JP 2000308122A JP 11108559 A JP11108559 A JP 11108559A JP 10855999 A JP10855999 A JP 10855999A JP 2000308122 A JP2000308122 A JP 2000308122A
Authority
JP
Japan
Prior art keywords
command
mobile station
base station
console
mobile
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP11108559A
Other languages
Japanese (ja)
Inventor
Yuji Kobayashi
裕二 小林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP11108559A priority Critical patent/JP2000308122A/en
Publication of JP2000308122A publication Critical patent/JP2000308122A/en
Pending legal-status Critical Current

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  • Mobile Radio Communication Systems (AREA)

Abstract

PROBLEM TO BE SOLVED: To enable a mobile station to speak with a console even while the console speaks with the other mobile station in a radio system for performing speaking between the console and the mobile station by connecting the console through a central control device to plural base stations with a cable transmission line and performing a wireless connection between the base stations and the mobile stations. SOLUTION: This system is composed of plural consoles 1a-1c, a central control device 2 connected with these consoles, plural base stations 4 connected with this central control device by a cable transmission line 7 and plural mobile stations 3 wirelessly connected with these base stations and in this radio system, speaking is performed between the console and the mobile station. Between the central control device and the base station, voices are transmitted by time division multiplexing.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】この発明は、指令卓と複数の
基地局間を有線の伝送路で接続し、これら複数の基地局
と基地局エリア間を移動する複数の移動局とは無線方式
で接続し、指令卓と移動局間で交信を行う無線システム
に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system in which a command console and a plurality of base stations are connected by a wired transmission line, and the plurality of base stations and a plurality of mobile stations moving between base station areas are wirelessly connected. The present invention relates to a wireless system that connects and communicates between a command console and a mobile station.

【0002】[0002]

【従来の技術】図4は、従来の無線システムの構成及び
信号伝送の通話スロットを示す図である。このアナログ
方式の無線システムでは各線区毎に設置した指令卓から
下り通話を行う場合、中央制御装置を介し、一定区間毎
に設置した基地局まで伝送路を一通話にて有線通信を行
い、基地局にて無線に変換して移動局と通話を行ってい
た。上り通話についてはこの逆の経路である。図4
(a)は従来のシステムを示す構成図であり、図におい
て、1は指令卓、2は中央制御装置、3a〜3cは移動
局、4は基地局、5は下り電波、6は上り電波、7は伝
送路、8は受信機、9は送受話器、10は送信機であ
る。また、図4(b)はこのシステムの通話回線におけ
る通話状態を示す図で11aは指令卓1から移動局3a
への下り通話スロット、11bは移動局3aから指令卓
1への上り通話スロットである。
2. Description of the Related Art FIG. 4 is a diagram showing a configuration of a conventional radio system and a communication slot for signal transmission. In this analog wireless system, when a down call is performed from a command console installed in each line section, a wired communication is performed by a single call through a transmission path to a base station installed in a fixed section via a central control device, The station was converting to wireless and talking with the mobile station. The reverse route is used for uplink communication. FIG.
(A) is a configuration diagram showing a conventional system, in which 1 is a command console, 2 is a central control device, 3a to 3c are mobile stations, 4 is a base station, 5 is a down radio wave, 6 is an up radio wave, 7 is a transmission line, 8 is a receiver, 9 is a handset, and 10 is a transmitter. FIG. 4 (b) is a diagram showing a communication state on a communication line of this system.
The downlink communication slot 11b is an uplink communication slot from the mobile station 3a to the command console 1.

【0003】次に動作について説明する。指令卓1と移
動局3aが通話を行う場合、指令卓1は移動局3aに音
声を送信する。音声は中央制御装置2及び伝送路7を下
り通話スロット11aに変換され、基地局4に伝送され
る。基地局4では下り通話スロット11aを無線信号に
変換し、下り電波5を送信する。移動局3aは下り電波
5を受信機8にて受信して音声に変換し、送受話器9か
ら音声を出力する。移動局3aから指令卓1に音声を送
信する場合は送受話器9からの音声信号を送信機10に
て無線信号に変換し、上り電波6を送信する。基地局4
では受信した無線信号を音声信号に変換し、上り通話ス
ロット11bを使用し伝送路7から中央制御装置2に伝
送される。
Next, the operation will be described. When the command console 1 and the mobile station 3a make a call, the command console 1 transmits voice to the mobile station 3a. The voice is converted into the down-talk slot 11a through the central control unit 2 and the transmission path 7 and transmitted to the base station 4. The base station 4 converts the downlink communication slot 11a into a radio signal and transmits the downlink radio wave 5. The mobile station 3a receives the down radio wave 5 at the receiver 8, converts it into voice, and outputs the voice from the handset 9. When transmitting voice from the mobile station 3a to the command console 1, a voice signal from the handset 9 is converted into a radio signal by the transmitter 10, and the upstream radio wave 6 is transmitted. Base station 4
Then, the received radio signal is converted into a voice signal and transmitted from the transmission path 7 to the central control device 2 using the uplink communication slot 11b.

【0004】[0004]

【発明が解決しようとする課題】従来のシステムは以上
のように構成されているため、指令卓と移動局は1線区
において1通話しか行うことができず、他の移動局が通
話を行いたい場合は通話が終わるまで待たなければなら
ず、緊急の場合に通話できないなどの問題があった。
Since the conventional system is configured as described above, the command console and the mobile station can make only one call in one line section, and the other mobile station makes a call. If you want to, you have to wait until the call is over.

【0005】この発明は上記のような問題点を解消する
ためになされたもので、中央制御装置と基地局との間が
有線伝送路により接続されているシステムにおいて、複
数の指令卓と複数の移動局が同時に通話を行うことがで
きる無線システムを得ることを目的とする。
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems. In a system in which a central control device and a base station are connected by a wired transmission line, a plurality of command consoles and a plurality of command consoles are provided. It is an object of the present invention to obtain a wireless system in which a mobile station can simultaneously make a call.

【0006】また、この発明は、指令卓、移動局間の通
話が行われている場合でも、上記一斉指令用の指令卓か
ら線区内の全ての移動局に対し一斉指令を行うことがで
きる無線システムを得ることを目的とする。
Further, according to the present invention, even when a call is made between the command console and the mobile station, the simultaneous command can be issued to all the mobile stations in the line section from the command console for simultaneous command. The aim is to obtain a wireless system.

【0007】また、この発明は、周波数の有効利用がで
き基地局の消費電力を少なくすることができる無線シス
テムを得ることを目的とする。
Another object of the present invention is to provide a radio system capable of effectively utilizing a frequency and reducing power consumption of a base station.

【0008】[0008]

【課題を解決するための手段】この発明の請求項1の無
線システムは、複数の指令卓と、これらの指令卓と接続
された中央制御装置と、この中央制御装置との間は有線
方式で接続された複数の基地局と、これらの基地局と無
線方式で接続された複数の移動局とから構成され、指令
卓と移動局とが通話を行う無線システムにおいて、中央
制御装置と基地局との間を時分割多重により音声を伝送
することにより指令卓と移動局の通話を同時に複数行う
ことができるようにしたことを特徴とするものである。
According to a first aspect of the present invention, there is provided a wireless system, comprising: a plurality of command consoles; a central controller connected to the consoles; and a wired system between the central controller and the central controller. In a wireless system comprising a plurality of connected base stations and a plurality of mobile stations connected to these base stations in a wireless manner, a central control unit and a base station are used in a wireless system in which a command console and mobile stations communicate. A plurality of telephone conversations between the command console and the mobile station can be performed at the same time by transmitting voice by time division multiplex.

【0009】また、この発明の請求項2の無線システム
は、上記請求項1の発明において、一斉指令用の指令卓
を備え、下り通話回線に一斉指令用スロットを設けるこ
とにより、指令卓、移動局間の通話が行われている場合
でも、上記一斉指令用の指令卓から線区内の全ての移動
局に対し一斉指令を行うことができるようにしたことを
特徴とするものである。
A wireless system according to a second aspect of the present invention is the wireless communication system according to the first aspect of the present invention, further comprising a command table for simultaneous command, and providing a slot for simultaneous command on a downlink communication line, so that the command table and mobile terminal can be moved. Even when a call is being made between stations, a simultaneous command can be issued to all the mobile stations in the line section from the command table for the simultaneous command.

【0010】また、この発明の請求項3の無線システム
は、上記請求項1または2の発明において、アクセス方
式を周波数分割多重方式とし、移動局から位置情報を基
地局を介して中央制御装置に送出し、中央制御装置は通
話対象の移動局の存在するエリアの基地局のみ電波を送
信するように制御を行うことにより、周波数の有効利用
ができ基地局の消費電力を少なくすることができるよう
にしたことを特徴とするものである。
[0010] Further, according to a third aspect of the present invention, in the wireless system according to the first or second aspect, the access system is a frequency division multiplexing system, and positional information is transmitted from the mobile station to the central control unit via the base station. The central control unit performs control so that only the base station in the area where the mobile station to be talked exists transmits radio waves, so that the frequency can be used effectively and the power consumption of the base station can be reduced. It is characterized by having made it.

【0011】[0011]

【発明の実施の形態】実施の形態1.以下、この発明の
実施の形態1を図面を用いて説明する。図1(a)は、
この発明の実施の形態1を示す構成図である。図1
(a)において、1a〜1cは指令卓、2は中央制御装
置、3a〜3cは移動局、4は基地局、5は基地局4か
ら移動局3a〜3cに送信される下り電波、6は移動局
3a〜3cから基地局に送信される上り電波、7は中央
制御装置から基地局の間及び基地局と基地局の間の伝送
路、8は移動局受信機、9は送受話器、10は送信機で
ある。また図1(b)はこのシステムにおける通話状況
を示す図で、12aは指令卓1aと移動局3aの間の下
り通話スロット、12bは移動局3aから指令卓1aへ
の上り通話スロット、13aは指令卓1bから移動局3
bへの下り通話スロット、13bは移動局3bから指令
卓1bへの上り通話スロット、14aは指令卓1cから
移動局3cへの下り通話スロット、14bは移動局3c
から指令卓1cへの上り通話スロットである。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 (a)
FIG. 1 is a configuration diagram showing Embodiment 1 of the present invention. FIG.
In (a), 1a to 1c are command consoles, 2 is a central control device, 3a to 3c are mobile stations, 4 is a base station, 5 is a down radio wave transmitted from the base station 4 to the mobile stations 3a to 3c, and 6 is Uplink radio waves transmitted from the mobile stations 3a to 3c to the base station, 7 is a transmission path between the central controller and the base station and between the base station and the base station, 8 is a mobile station receiver, 9 is a handset, 10 Is a transmitter. FIG. 1 (b) is a diagram showing a call situation in this system, in which 12a is a downlink communication slot between the command console 1a and the mobile station 3a, 12b is an uplink communication slot from the mobile station 3a to the command console 1a, and 13a is a communication slot. From the control console 1b to the mobile station 3
b, a communication slot 13b from the mobile station 3b to the command console 1b, a communication slot 14a from the command console 1c to the mobile station 3c, and 14b a mobile station 3c.
This is an upstream communication slot from the terminal to the command console 1c.

【0012】次に動作について説明する。指令卓1b及
び1cが移動局3cと通話中に指令卓1aが移動局3a
と通話を行う場合、指令卓1aは移動局3aに音声を送
信する。音声は中央制御装置2に伝送され、通話中の指
令卓1b及び1cの音声と時分割多重される。時分割多
重された音声は下り通話スロット12a、13a、14
aとして伝送路7を介して全ての基地局4に伝送され
る。基地局4では時分割多重された下り通話スロット1
2a、13a、14aを無線信号に変換し、下り電波5
を移動局3a〜3cに送信する。移動局3a〜3cは下
り電波5を受信機8にて受信し、各移動局ではそれぞれ
割り当てられたスロットの下り電波5を取り出し、復調
を行って送受話器9から音声を出力する。
Next, the operation will be described. While the control consoles 1b and 1c are communicating with the mobile station 3c, the control console 1a sets the mobile station 3a.
When making a call, the command console 1a transmits a voice to the mobile station 3a. The voice is transmitted to the central control unit 2 and time-division multiplexed with the voices of the command consoles 1b and 1c during a call. The time-division multiplexed audio is transmitted to the downlink communication slots 12a, 13a, 14
The data is transmitted to all the base stations 4 via the transmission path 7 as a. In the base station 4, time-division multiplexed downlink traffic slot 1
2a, 13a and 14a are converted into radio signals,
To the mobile stations 3a to 3c. The mobile stations 3a to 3c receive the downlink radio wave 5 by the receiver 8, and each mobile station extracts the downlink radio wave 5 of the assigned slot, demodulates and outputs the voice from the handset 9.

【0013】また、移動局3aから指令卓1aに音声を
伝送する場合は、移動局3aは送受話器9を使用して音
声を入力し、送信機10にて上り電波6に変換し、各々
の移動局に割り当てられたスロットを使用して基地局4
に上り電波を送信する。上り電波6を受信した基地局4
は移動局3a〜3cから送信された上り電波6の音声と
時分割多重を行い、上り通話スロット12b、13b、
14bとして伝送路7を介して中央制御装置2に伝送す
る。中央制御装置2は時分割多重された音声を指令卓1
aに送信し、指令卓1aは移動局3aからの音声を出力
する。
When transmitting voice from the mobile station 3a to the command console 1a, the mobile station 3a inputs the voice using the handset 9, converts the voice into the upstream radio wave 6 at the transmitter 10, and converts the The base station 4 using the slot allocated to the mobile station.
To transmit the up radio wave. Base station 4 that received uplink radio wave 6
Performs time division multiplexing with the voice of the uplink radio wave 6 transmitted from the mobile stations 3a to 3c, and performs uplink traffic slots 12b, 13b,
The signal is transmitted to the central control device 2 via the transmission line 7 as 14b. The central controller 2 outputs the time-division multiplexed voice to the command console 1.
a, and the console 1a outputs the sound from the mobile station 3a.

【0014】実施の形態2.図2(a)はこの発明の実
施の形態2による無線システムの構成を示す図である。
図において、15は一斉指令用スロット、16は一斉指
令用指令卓である。一斉指令用指令卓16から全ての移
動局3a、3b、3cに一斉指令を行う場合、以上の通
話の方法と同様に図2(b)の通話スロットを示す図に
おける一斉指令用スロット15を使用して時分割多重を
行い、移動局3a、3b、3cに送信することで複数の
通話を行いながら一斉指令を行うことができる。この場
合、移動局では自局用の送受信スロットの他に一斉指令
用のスロットを受信可能であるものである。
Embodiment 2 FIG. FIG. 2A is a diagram showing a configuration of a wireless system according to Embodiment 2 of the present invention.
In the figure, 15 is a simultaneous command slot, and 16 is a simultaneous command console. When a simultaneous command is issued from the simultaneous command table 16 to all the mobile stations 3a, 3b and 3c, the simultaneous command slot 15 in the drawing showing the communication slot of FIG. Then, by performing time division multiplexing and transmitting to the mobile stations 3a, 3b, 3c, a simultaneous command can be issued while performing a plurality of calls. In this case, the mobile station can receive a simultaneous command slot in addition to the transmission / reception slot for the mobile station.

【0015】実施の形態3.図3(a)はこの発明の実
施の形態3である無線システムの構成を示す図、図3
(b)は通話スロットを示す図である。図において、1
6aは指令卓1aと移動局3aの下り通話用の下り電
波、16bは指令卓1bと移動局3bの下り通話用の下
り電波、16cは指令卓1cと移動局3cの下り通話用
の下り電波、17aは指令卓1aと移動局3aの上り通
話用の上り電波、17bは指令卓1bと移動局3bの上
り通話用の上り電波、17cは指令卓1cと移動局3c
の上り通話用の上り電波である。
Embodiment 3 FIG. 3A shows a configuration of a wireless system according to Embodiment 3 of the present invention.
(B) is a diagram showing a call slot. In the figure, 1
6a is a downlink radio wave for downlink communication between the command console 1a and the mobile station 3a, 16b is a downlink radio wave for downlink communication between the command console 1b and the mobile station 3b, and 16c is a downlink radio wave for downlink communication between the command console 1c and the mobile station 3c. , 17a are uplink radio waves for uplink communication between the command console 1a and the mobile station 3a, 17b are uplink radio waves for uplink communication between the command console 1b and the mobile station 3b, 17c is the command console 1c and the mobile station 3c.
This is an upstream radio wave for upstream communication.

【0016】以下、この動作について説明する。指令卓
1b及び1cが移動局3b及び3cとそれぞれ通話中に
指令卓1aが移動局3aに音声を送信する。音声は指令
卓1aから中央制御装置2に伝送され、通話中の指令卓
1b、1cの音声と時分割多重される。時分割多重され
た音声は下り通話スロット12a、13a、14aとし
て伝送路7を介し、全ての基地局に伝送される。基地局
4では時分割多重された音声を分解し、指令卓1aと移
動局3aの下り通話スロット12aは専用に割り当てら
れた周波数を使用した下り電波16aに変換し、移動局
3aに送信する。下り電波16b、16cについても同
様に変換され、移動局3b、3cに送信する。移動局3
aは下り電波16aを受信し、受信機8にて復調を行い
送受話器9から音声を出力する。
Hereinafter, this operation will be described. While the control consoles 1b and 1c are communicating with the mobile stations 3b and 3c, respectively, the control console 1a transmits voice to the mobile station 3a. The voice is transmitted from the command console 1a to the central controller 2, and is time-division multiplexed with the voice of the command consoles 1b and 1c during a call. The time-division multiplexed voice is transmitted to all base stations via the transmission path 7 as downlink communication slots 12a, 13a, and 14a. The base station 4 decomposes the time-division multiplexed voice, converts the command console 1a and the downlink communication slot 12a of the mobile station 3a into a downlink radio wave 16a using a frequency assigned exclusively, and transmits the converted signal to the mobile station 3a. The downlink radio waves 16b and 16c are similarly converted and transmitted to the mobile stations 3b and 3c. Mobile station 3
“a” receives the downlink radio wave 16 a, demodulates it in the receiver 8, and outputs sound from the transmitter / receiver 9.

【0017】また、移動局から指令卓1aに音声を伝送
する場合は、移動局3aは送受話器9を使用して音声と
移動局3aの位置情報を入力し、送信機10にて専用に
割り当てられた周波数を使用した上り電波17aに変換
し、基地局4に送信する。基地局4は上り電波17を受
信し、同様に受信した移動局3b、3cからの上り電波
17b、17cと時分割多重を行い、上り通話スロット
12b、13b、14bとして伝送路7を介して中央制
御装置2に送信する。中央制御装置2は時分割多重され
た音声をスロット毎に分解し、指令卓1aに割り当てら
れた音声を指令卓1aに送信し、指令卓1aは移動局3
aからの音声を出力する。また、中央制御装置2では移
動局3a、3b、3cから送信された位置情報を認識す
る。以上により基地局は通話対象の移動局に対してのみ
下り電波を送出すればよく、対象の移動局が存在しない
基地局は電波を送出しないため、消費電力を低減するこ
とができる。
When transmitting voice from the mobile station to the command console 1a, the mobile station 3a uses the handset 9 to input the voice and the position information of the mobile station 3a, and allocates the voice to the transmitter 10 exclusively. The base station 4 converts the obtained frequency into an uplink radio wave 17a using the frequency, and transmits the radio wave 17a to the base station 4. The base station 4 receives the uplink radio wave 17, performs time-division multiplexing with the uplink radio waves 17b and 17c from the mobile stations 3b and 3c that have been received in the same manner, and forms the uplink traffic slots 12b, 13b and 14b via the transmission path 7 as a central channel. Transmit to the control device 2. The central control unit 2 decomposes the time-division multiplexed voice for each slot and transmits the voice assigned to the command console 1a to the command console 1a.
Output the sound from a. The central controller 2 recognizes the position information transmitted from the mobile stations 3a, 3b, 3c. As described above, the base station only needs to transmit the downlink radio wave to the mobile station of the call target, and the base station having no target mobile station does not transmit the radio wave, so that the power consumption can be reduced.

【0018】[0018]

【発明の効果】この発明は以上のように構成されている
ので、以下に示すような効果を得ることができる。この
発明の請求項1に記載の無線システムによれば、複数の
指令卓とそれぞれ対応する複数の移動局とが同時に通話
を行うことができる。
Since the present invention is configured as described above, the following effects can be obtained. According to the wireless system according to the first aspect of the present invention, a plurality of command consoles and a plurality of mobile stations respectively corresponding to each other can simultaneously communicate.

【0019】また、この発明の請求項2に記載の無線シ
ステムによれば、下り通話回線に一斉指令用のスロット
を設けるようにしたので、複数の指令卓と対応する複数
の移動局とが同時に通話を行っている場合でも、全ての
移動局に対し一斉指令を行うことができる。
Further, according to the radio system according to the second aspect of the present invention, since a slot for simultaneous command is provided in the downlink communication line, a plurality of command consoles and a plurality of mobile stations corresponding to the command console can be simultaneously operated. Even during a call, a simultaneous command can be issued to all mobile stations.

【0020】さらに、この発明の請求項3に記載の無線
システムによれば、通話対象の移動局が存在しない基地
局は電波を送出しないようにしたので、基地局の消費電
力を低減することができる。
Further, according to the wireless system of the third aspect of the present invention, since the base station having no mobile station to be called does not transmit radio waves, the power consumption of the base station can be reduced. it can.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 この発明の実施の形態1による無線システム
の構成及び通話スロットを示す図。
FIG. 1 is a diagram showing a configuration of a wireless system and a communication slot according to a first embodiment of the present invention.

【図2】 この発明の実施の形態2による無線システム
の構成及び通話スロットを示す図。
FIG. 2 is a diagram showing a configuration of a wireless system and a communication slot according to a second embodiment of the present invention.

【図3】 この発明の実施の形態2による無線システム
の構成及び通話スロットを示す図。
FIG. 3 is a diagram showing a configuration of a wireless system and a communication slot according to a second embodiment of the present invention.

【図4】 従来の無線システムの構成及び通話スロット
を示す図。
FIG. 4 is a diagram showing a configuration and a call slot of a conventional wireless system.

【符号の説明】[Explanation of symbols]

1a〜1c 指令卓、 2 中央制御装置、 3a〜
3c 移動局、 4基地局、 5 下り電波、 6 上
り電波、 7 伝送路、 8 受信機、 9送受話器、
10 送信機、 11a 下り通話スロット、 11
b 上り通話スロット。
1a-1c Command console, 2 Central controller, 3a-
3c mobile station, 4 base station, 5 downlink radio wave, 6 uplink radio wave, 7 transmission line, 8 receiver, 9 handset,
10 transmitter, 11a downlink communication slot, 11
b Uplink call slot.

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 複数の指令卓と、これらの指令卓と接続
された中央制御装置と、この中央制御装置との間を有線
伝送路で接続された複数の基地局と、これらの基地局と
無線方式で接続された複数の移動局とから構成され、指
令卓と移動局とが通話を行う無線システムにおいて、中
央制御装置と基地局との間を時分割多重により音声を伝
送することにより指令卓と移動局の通話を同時に複数行
うことができるようにしたことを特徴とする無線システ
ム。
1. A plurality of command consoles, a central controller connected to the consoles, a plurality of base stations connected to the central controller by a wired transmission line, and In a wireless system that includes a plurality of mobile stations connected in a wireless manner and in which a command console and a mobile station communicate with each other, a command is transmitted by transmitting time-division multiplexed voice between a central controller and a base station. A wireless system wherein a plurality of calls between a desk and a mobile station can be made simultaneously.
【請求項2】 一斉指令用の指令卓を備え、下り通話回
線に一斉指令用スロットを設けることにより、指令卓、
移動局間の通話が行われている場合でも、上記一斉指令
用の指令卓から線区内の全ての移動局に対し一斉指令を
行うことができるようにしたことを特徴とする請求項1
記載の無線システム。
2. A command console for a simultaneous command, and a slot for a simultaneous command on a downlink communication line to provide a command console,
2. A simultaneous command can be issued to all mobile stations in a line section from the command table for the simultaneous command even when a call is being made between mobile stations.
The wireless system as described.
【請求項3】 アクセス方式を周波数分割多重方式と
し、移動局から位置情報を基地局を介して中央制御装置
に送出し、中央制御装置は通話対象の移動局の存在する
エリアの基地局のみ電波を送信するように制御を行うこ
とにより、周波数の有効利用ができ基地局の消費電力を
少なくすることができるようにしたことを特徴とする請
求項1または2記載の無線システム。
3. An access system is a frequency division multiplexing system, and location information is transmitted from a mobile station to a central controller via a base station, and the central controller transmits radio waves only to the base station in the area where the mobile station to be talked exists. The wireless system according to claim 1 or 2, wherein control is performed such that the base station is transmitted so as to reduce the power consumption of the base station.
JP11108559A 1999-04-15 1999-04-15 Radio system Pending JP2000308122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11108559A JP2000308122A (en) 1999-04-15 1999-04-15 Radio system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11108559A JP2000308122A (en) 1999-04-15 1999-04-15 Radio system

Publications (1)

Publication Number Publication Date
JP2000308122A true JP2000308122A (en) 2000-11-02

Family

ID=14487908

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11108559A Pending JP2000308122A (en) 1999-04-15 1999-04-15 Radio system

Country Status (1)

Country Link
JP (1) JP2000308122A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100384284C (en) * 2005-10-11 2008-04-23 上海华为技术有限公司 Method for realizing link audit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100384284C (en) * 2005-10-11 2008-04-23 上海华为技术有限公司 Method for realizing link audit

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