JPH0870273A - Digital radio communication system - Google Patents

Digital radio communication system

Info

Publication number
JPH0870273A
JPH0870273A JP6203895A JP20389594A JPH0870273A JP H0870273 A JPH0870273 A JP H0870273A JP 6203895 A JP6203895 A JP 6203895A JP 20389594 A JP20389594 A JP 20389594A JP H0870273 A JPH0870273 A JP H0870273A
Authority
JP
Japan
Prior art keywords
mobile station
base station
transmission
signal
unit
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.)
Granted
Application number
JP6203895A
Other languages
Japanese (ja)
Other versions
JP2606595B2 (en
Inventor
Tatsu Nakahara
達 中原
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP6203895A priority Critical patent/JP2606595B2/en
Publication of JPH0870273A publication Critical patent/JPH0870273A/en
Application granted granted Critical
Publication of JP2606595B2 publication Critical patent/JP2606595B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02Power saving arrangements
    • H04W52/0209Power saving arrangements in terminal devices
    • H04W52/0261Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/0277Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof according to available power supply, e.g. switching off when a low battery condition is detected
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Abstract

PURPOSE: To reduce the power consumption of a battery and to improve the convenience of use by providing a control means reducing the transmission rate of a signal through a communication line according to a request from a mobile station to a base station and the mobile station. CONSTITUTION: When a remaining capacity of a battery 110 is reduced during the communication by a mobile station 1, a battery capacity detection section 111 sends information representing a reduced battery capacity to a control section 100. Upon the receipt of the information, the control section 100 sets request data of control data revising a transmission speed of radio communication to 1/2 or 1/4 to a TDMA/TDD processing section 101. The control data are received by a base station through a radio section of the mobile station 1 in a form of a radio signal. On the other hand, the base station detects a revised transmission speed of radio communication, then return an acknowledge signal by using the control data similarly and sends a synchronization burst signal according to the transmission speed requested by the mobile station 1 in a transmission reception timing.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、複数の小地域の無線ゾ
ーンにより構成され、TDMA/TDD(Time Divisio
n Multiple Access:時分割多元接続/Time Division Du
plex: 時分割二重) 方式による時分割多重通信に利用す
る。本発明は、移動局の無線機に電力を間欠的に供給し
て待ち受け時の消費電力を削減することができるディジ
タル無線通信方式に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a plurality of wireless zones in a small area, and includes a TDMA / TDD (Time Divisio
n Multiple Access: Time Division Duplex
(plex: time division duplex) Used for time division multiplex communication by the method. The present invention relates to a digital wireless communication system capable of reducing power consumption during standby by intermittently supplying power to a wireless device of a mobile station.

【0002】[0002]

【従来の技術】従来、この種のTDMA/TDD方式に
よる基地局と移動局とのディジタル無線通信は、図6に
示すように、送信と受信が交互に時分割多重され送受信
されている。すなわち、移動局と基地局との通信は、各
時間のスロットにおいて送信および受信を一定時間毎に
動作させて通信を行うTDD方式で行い、さらにTDM
Aディジタル通信方式により複数の移動局との間で通信
が行われている。
2. Description of the Related Art Conventionally, as shown in FIG. 6, in digital radio communication between a base station and a mobile station according to this type of TDMA / TDD system, transmission and reception are alternately time-division multiplexed for transmission and reception. That is, the communication between the mobile station and the base station is performed by the TDD method in which transmission and reception are operated at fixed time intervals in each time slot to perform communication.
A digital communication system is used to communicate with a plurality of mobile stations.

【0003】基地局と移動局との間の通信で使用される
TDMA/DTTフレームは、例えば、図6の10に示
すように構成され、1TDMA/TDDフレームは1フ
レームの長さが5mSであり、長さ0.625mSのス
ロットを8個有している。第1から第4のスロットは基
地局の送信スロット、すなわち移動局の受信スロットと
して使用される。また、第5から第8のスロットは基地
局の受信スロット、すなわち移動局の送信スロットとし
て使用される。
A TDMA / DTT frame used in communication between a base station and a mobile station is constructed, for example, as shown in 10 of FIG. 6, and one TDMA / TDD frame has a length of 5 mS per frame. , Has eight slots each having a length of 0.625 mS. The first to fourth slots are used as transmission slots of the base station, that is, reception slots of the mobile station. The fifth to eighth slots are used as reception slots of the base station, that is, transmission slots of the mobile station.

【0004】基地局と移動局との間で通信を行う場合、
一つの移動局には1フレーム当り一つの受信スロットと
一つの送信スロットが割り当てられる。移動局と基地局
との通信に使用する音声信号のデータは、アナログ・デ
ィジタル交換されPCM(Pulse Code Modulation:パル
ス符号変調)信号となった音声帯域信号を伝送レート3
2KbpsのADPCM(Adaptive Differential PCM:適応
差分パルス符号変調)信号に圧縮符号化し、パケットデ
ータとして処理され、一つの送信スロット、または受信
スロットに重畳される。
When communication is performed between a base station and a mobile station,
One reception slot and one transmission slot are assigned to one mobile station per frame. The voice signal data used for communication between the mobile station and the base station is converted into a PCM (Pulse Code Modulation: Pulse Code Modulation) voice band signal by analog / digital exchange at a transmission rate of 3.
It is compression-coded into an ADPCM (Adaptive Differential PCM: Adaptive Differential Pulse Code Modulation) signal of 2 Kbps, processed as packet data, and superimposed on one transmission slot or one reception slot.

【0005】TDMA/TDD方式によるディジタル無
線通信においては、実際に基地局と移動局との間での通
信を実現するには、基地局と移動局とが同じ時間を刻む
精度の優れた基準信号発生回路を有し、基地局と移動局
とで同期を確立する必要がある。そこで、基地局から移
動局に対して無線フレーム同期信号を送信し、この同期
信号に基づいて移動局は基地局との同期を確立してい
る。この状態を図7に示す。
[0005] In the digital radio communication based on the TDMA / TDD system, in order to actually realize the communication between the base station and the mobile station, the base station and the mobile station are required to keep the same time by using a reference signal with excellent accuracy. It is necessary to have a generation circuit and establish synchronization between the base station and the mobile station. Therefore, the base station transmits a radio frame synchronization signal to the mobile station, and the mobile station establishes synchronization with the base station based on this synchronization signal. This state is shown in FIG.

【0006】図7によると、基地局から送られる送話信
号(T1)により移動局はそれ自体の同期を取り、基地
局の受信タイミング(R1)で移動局の送信を行う。な
お、図7で示されているタイミングは移動局が通話状態
で使用されている場合である。
According to FIG. 7, the mobile station synchronizes itself with the transmission signal (T1) transmitted from the base station, and transmits the mobile station at the reception timing (R1) of the base station. The timing shown in FIG. 7 is when the mobile station is being used in a call state.

【0007】他方、通話時以外の待ち受け状態において
も移動局は基地局との無線フレームのタイミングを同期
させる必要があるため、移動局においては常時、基地局
からの受信タイミングを間欠的に受信して、移動局の送
受信タイミングの同期を取っている。この状態を図8を
使って説明する。
On the other hand, even in a standby state other than during a call, the mobile station needs to synchronize the timing of the radio frame with the base station, so that the mobile station constantly receives the reception timing from the base station intermittently. Thus, the transmission and reception timing of the mobile station is synchronized. This state will be described with reference to FIG.

【0008】図8によると、移動局は1TDMA/TD
Dフレーム毎に毎回送受信するのではなく、基地局より
送られる間欠的な同期信号T4を移動局は受信すること
により、送受信タイミングの同期を取っている。この場
合、移動局が待ち受け状態で電池の長寿命をはかるた
め、移動局は間欠的な受信動作の制御を行い、受信時の
み移動局の無線部および制御部の各回路部への給電を行
い、他の空いているタイミング時間においては移動局の
電源を遮断するバッテリセービングを行っている。移動
局自体は、この受信タイミング時以外、電源を遮断し不
要な電池の消耗を防止することにより、バッテリセービ
ングを実現している。この状態を図8のdに示す。
[0008] According to FIG. 8, the mobile station has 1 TDMA / TD.
The mobile station receives the intermittent synchronization signal T4 transmitted from the base station instead of transmitting and receiving every D frame, thereby synchronizing the transmission and reception timing. In this case, since the mobile station has a long battery life in the standby state, the mobile station controls the intermittent reception operation and supplies power to the radio section of the mobile station and each circuit section of the control section only during reception. , Battery saving is performed to shut off the power supply of the mobile station at other vacant timing times. The mobile station itself realizes battery saving by shutting off the power supply at times other than the reception timing and preventing unnecessary battery consumption. This state is shown in FIG.

【0009】ここで、移動局内部では、あらかじめ基地
局からの受信タイミングに合わせて移動局の回路部の電
源をON/OFF制御するタイマをセットし、基地局か
らの送信信号を受信する直前にタイマの時間をセットア
ップすることにより、移動局の回路部の電源をON制御
させ、各回路部への通電を行っている。このように、移
動局が待ち受け時にはバッテリセービングによる電池の
長期化が可能であるが、移動局での通話時においては、
図7に示したように常に1フレーム毎に送受信のタイミ
ングで移動局が送受信を行うため、移動局の待ち受け状
態のようなバッテリセービングを行うことはできない。
Here, in the mobile station, a timer for controlling ON / OFF of the power supply of the circuit section of the mobile station is set in advance in accordance with the reception timing from the base station, and immediately before receiving a transmission signal from the base station. By setting up the time of the timer, the power supply of the circuit unit of the mobile station is controlled to be ON, and power is supplied to each circuit unit. As described above, when the mobile station is on standby, it is possible to extend the battery by battery saving.
As shown in FIG. 7, the mobile station always performs transmission / reception at the transmission / reception timing for each frame, so that it is not possible to perform battery saving as in the standby state of the mobile station.

【0010】従来開示された技術として、待ち受け状態
で消費電力を低減するもの(特開平4−345330号
公報、特開平4−70430号公報)、供給する電源電
圧を変更して消費電力を低減するもの(特開平3−26
028号公報)、残りの通信可能時間を表示するもの
(特開平2−109449号公報)などがあるが、いず
れも通信中の伝送速度を変更する技術については開示が
ない。
As a technique disclosed in the related art, a technique for reducing power consumption in a standby state (Japanese Patent Laid-Open Nos. 4-345330 and 4-70430), and a power supply voltage to be supplied is changed to reduce power consumption. (Japanese Unexamined Patent Publication No.
No. 028) and a device for displaying the remaining communication time (Japanese Patent Laid-Open No. 2-109449), but none of them discloses a technique for changing the transmission rate during communication.

【0011】[0011]

【発明が解決しようとする課題】このような従来のシス
テムでは、移動局の使用者が長時間におよぶ通話を行
い、電池が放電終了近い状態となった場合には、使用者
はその通話を一旦終了させ電池交換を行う以外に通話を
継続させる方法がなかった。
In such a conventional system, when a user of a mobile station makes a call for a long time, and when the battery is almost discharged, the user stops the call. There was no way to continue the call except to end it and replace the battery.

【0012】本発明はこのような問題を解決するもの
で、移動局の電池が放電終了近くになった場合に、移動
局と基地局との無線通信の伝送速度を通常の半分、もし
くは1/4に低下させる制御を行い、移動局から送出す
る送信信号の頻度を少なくすることにより、送信による
電池の消費を軽減して移動局の使用時間の長期化をはか
り、使用の便宜性を改善することができる無線通信方式
を提供することを目的とする。
The present invention solves such a problem. When the battery of the mobile station is near the end of discharge, the transmission speed of the wireless communication between the mobile station and the base station is half or 1 / us of the normal rate. By reducing the frequency of the transmission signal sent from the mobile station by performing control to reduce to 4, the battery consumption by transmission is reduced, the usage time of the mobile station is prolonged, and the convenience of use is improved. It is an object of the present invention to provide a wireless communication system capable of performing the communication.

【0013】[0013]

【課題を解決するための手段】本発明は、無線通信にお
ける移動局の無線機が消費する電力を削減できるように
するもので、基地局と移動局との間に、TDMA方式に
より時分割多重無線通信回線が設定されたディジタル無
線通信方式において、前記基地局および前記移動局に
は、前記移動局からの要求にしたがって前記通信回線の
伝送速度を低減させる制御手段を備えたことを特徴とす
る。
DISCLOSURE OF THE INVENTION The present invention is intended to reduce the power consumed by a radio of a mobile station in radio communication. Time division multiplexing is performed between a base station and a mobile station by a TDMA method. In the digital wireless communication system in which a wireless communication line is set, the base station and the mobile station are provided with control means for reducing the transmission rate of the communication line in accordance with a request from the mobile station. .

【0014】前記移動局には、電池の容量を検出する手
段を備え、この容量が所定値以下になったときに伝送速
度を低減させる要求を発生する手段を備え、前記伝送速
度は、標準伝送速度に対して2分の1毎に複数の段階に
設定されることが望ましく、前記基地局は有線電話回線
に固定的に接続された親電話機であり、前記移動局はこ
の親電話機に前記無線通信回線を介して接続される子機
であることができる。
The mobile station includes means for detecting the capacity of the battery, and means for generating a request to reduce the transmission rate when the capacity becomes less than or equal to a predetermined value. Preferably, the speed is set in a plurality of stages every half, and the base station is a master telephone fixedly connected to a wired telephone line, and the mobile station is connected to the master telephone by the wireless communication. It can be a handset connected via a communication line.

【0015】[0015]

【作用】移動局において電池容量の検出を行い、電池容
量がある一定値以下になった場合、移動局より基地局に
対し制御チャネルにより送受信タイミングを1/2、ま
たは1/4に変更する要求を送出し、基地局において送
受信タイミングを低速に制御させるとともに、この送受
信タイミングの変更に伴い移動局および基地局において
送信または受信スロットに重畳している音声符号データ
であるADPCM信号の伝送レートを可変に制御させ
る。
The mobile station detects the battery capacity, and when the battery capacity falls below a certain value, the mobile station requests the base station to change the transmission / reception timing to 1/2 or 1/4 by the control channel. And the base station controls the transmission / reception timing at a low speed, and the mobile station and the base station change the transmission rate of the ADPCM signal, which is the voice code data superimposed on the transmission or reception slot, in accordance with the change in the transmission / reception timing. Control.

【0016】これにより、移動局および基地局ともに通
常と比較して1/2、または1/4の低速の送受信タイ
ミングによる無線通信を行うことができ、このスロット
信号に重畳している音声符号データも同様に1/2また
は1/4に変更されるので通話はそのまま維持され、か
つ、移動局が送信する送信信号の頻度が少なくなるため
に移動局の電池容量を長時間保たせることができる。
[0016] Thus, both the mobile station and the base station can perform radio communication at a transmission / reception timing that is 1/2 or 1/4 that of a normal transmission / reception timing, and voice code data superimposed on this slot signal. Is similarly changed to ま た は or 同 様, so that the call is maintained as it is, and the frequency of the transmission signal transmitted by the mobile station is reduced, so that the battery capacity of the mobile station can be maintained for a long time. .

【0017】[0017]

【実施例】次に、本発明実施例を図面に基づいて説明す
る。本発明実施例は、基地局と移動局との間に、TDM
A方式により時分割多重無線通信回線が設定され、基地
局および移動局には、移動局からの要求にしたがって通
信回線の伝送速度を低減させる制御手段と、電池の容量
を検出する手段と、この容量が所定値以下になったとき
に伝送速度を低減させる要求を発生する手段とを備え
る。前記伝送速度は、標準伝送速度に対して2分の1毎
に複数の段階に設定され、基地局は有線電話回線に固定
的に接続された親電話機であり、移動局はこの親電話機
に無線通信回線を介して接続される子機であることがで
きる。
Embodiments of the present invention will now be described with reference to the drawings. In the embodiment of the present invention, the TDM is provided between the base station and the mobile station.
A time division multiplex wireless communication line is set by the A system, and a control means for reducing the transmission speed of the communication line according to a request from the mobile station, a means for detecting the capacity of the battery, and a base station and a mobile station, And a means for generating a request to reduce the transmission rate when the capacity becomes less than or equal to a predetermined value. The transmission speed is set to a plurality of stages every half of the standard transmission speed, and the base station is a master telephone fixedly connected to a wired telephone line, and the mobile station communicates with the master telephone wirelessly. It can be a handset connected via a communication line.

【0018】ここで、具体的な構成を例に本発明ディジ
タル無線通信方式を説明する。図1は本発明実施例にお
ける移動局の構成を示すブロック図、図2は本発明実施
例における基地局の構成を示すブロック図である。
Here, the digital wireless communication system of the present invention will be described by taking a specific configuration as an example. FIG. 1 is a block diagram illustrating a configuration of a mobile station according to an embodiment of the present invention, and FIG. 2 is a block diagram illustrating a configuration of a base station according to the embodiment of the present invention.

【0019】基地局2には、TDMA方式による時分割
多重通信によりディジタル信号の授受を行う無線通信手
段と、この無線通信手段と有線電話回線210とを接続
する回線インタフェース部209と、前記無線通信手段
を制御する主制御部200とが備えられる。また、移動
局1には、前記無線通信手段と、この無線通信手段に接
続された送受話器109と、前記無線通信手段を制御す
る制御部100と、この制御部100に接続されたタイ
マー部113と、ダイヤルボタン部114と、電源を供
給する電源部と、電池容量を検出する電池容量検出部1
11とが備えられる。
The base station 2 includes a wireless communication unit for transmitting and receiving digital signals by time division multiplex communication according to the TDMA system, a line interface unit 209 for connecting the wireless communication unit to the wired telephone line 210, and the wireless communication unit. A main controller 200 for controlling the means. In the mobile station 1, the wireless communication unit, the handset 109 connected to the wireless communication unit, the control unit 100 for controlling the wireless communication unit, and the timer unit 113 connected to the control unit 100. , Dial button section 114, power supply section for supplying power, and battery capacity detection section 1 for detecting battery capacity
11 are provided.

【0020】主制御部200および制御部100には、
基地局2と移動局1との無線通信の伝送速度を可変する
手段と、電池容量に応じ基地局2と移動局1との無線通
信の伝送速度の可変を制御する手段とが含まれる。
The main control unit 200 and the control unit 100 include
Means for varying the transmission rate of the wireless communication between the base station 2 and the mobile station 1 and means for controlling the variation of the transmission rate for the wireless communication between the base station 2 and the mobile station 1 according to the battery capacity are included.

【0021】前記無線通信手段は、アンテナ107に接
続され送受信の切替えを行う送受信切替部106と、受
信信号を増幅する受信増幅部105と、増幅された信号
を復調する無線信号復調部104と、送受話器109と
の音声信号の処理を行う音声信号処理部108と、主制
御部200または制御部100の制御にしたがって音声
信号処理部108からのディジタル信号をTDMA/T
DD信号に変調または復調し無線信号に重畳するシリア
ル信号を生成するTDMA/TDD処理部101と、こ
のTDMA/TDD処理部101からの無線信号を変調
する無線信号変調部102と、この無線信号変調部10
2からの無線信号を増幅し送受信切替部106に送出す
る送信増幅部103とにより構成される。
The wireless communication means includes a transmission / reception switching unit 106 connected to an antenna 107 for switching between transmission and reception, a reception amplification unit 105 for amplifying a reception signal, a radio signal demodulation unit 104 for demodulating the amplified signal, An audio signal processing unit 108 for processing an audio signal with the handset 109 and a digital signal from the audio signal processing unit 108 under the control of the main control unit 200 or the control unit 100.
A TDMA / TDD processing unit 101 that modulates or demodulates a DD signal to generate a serial signal to be superimposed on a radio signal, a radio signal modulation unit 102 that modulates a radio signal from the TDMA / TDD processing unit 101, and a radio signal modulation Part 10
2 and a transmission amplification unit 103 that amplifies the radio signal from the transmission unit 2 and sends it to the transmission / reception switching unit 106.

【0022】また、前記電源部には、電源を供給する電
池110と、電源の開閉を行う電源ボタン115と、電
源供給を制御する電源制御部112とが含まれる。
The power supply unit includes a battery 110 for supplying power, a power button 115 for opening and closing the power supply, and a power control unit 112 for controlling power supply.

【0023】図3は本発明実施例におけるパケットデー
タの構成を示す図である。本発明実施例におけるパケッ
トデータは、1スロットが240ビット長のデータ列か
ら成り、各々12ビットのヘッドデータ、16ビットの
同期データ、20ビットの制御データ、160ビットの
音声符号データ、16ビットのCRC(Cyclic Redunda
ncy Check Code: 巡回冗長検査コード)データ、および
16ビットのガードデータにより構成される。音声符号
データの160ビットは、4ビットのADPCM(適応
差分パルス符号変調)信号であり4ビット×40のデー
タのパケットから構成される。音声に関係する音声符号
データ以外のヘッドデータ、同期データ、制御データ、
CRCデータ、およびガードデータは、パケットデータ
の開始や同期および誤り訂正に使用するデータであり、
音声信号とは無関係である。
FIG. 3 is a diagram showing the structure of packet data in the embodiment of the present invention. In the packet data according to the embodiment of the present invention, one slot consists of a data string having a length of 240 bits, and each has 12 bits of head data, 16 bits of synchronization data, 20 bits of control data, 160 bits of voice code data, and 16 bits of voice data. CRC (Cyclic Redunda
ncy Check Code: cyclic redundancy check code) data and 16-bit guard data. 160 bits of the voice code data is a 4-bit ADPCM (adaptive differential pulse code modulation) signal and is composed of a data packet of 4 bits × 40. Head data other than voice code data related to voice, synchronization data, control data,
CRC data and guard data are data used for starting and synchronizing packet data and correcting errors.
It has nothing to do with the audio signal.

【0024】次に、このように構成された本発明実施例
における動作について説明する。図4は本発明実施例に
おける通常時の送受信動作タイミングを示す図である。
これによると通常時は、移動局1と基地局2とは5mS
毎に交互に送受信を行い、その送受信の音声信号データ
のADPCM信号は、1スロット当り160ビットであ
るため、伝送レートは32Kbps(160ビット/5m
S)が必要となる。この状態を図4のbおよびcに示
す。
Next, the operation of the embodiment of the present invention configured as described above will be described. FIG. 4 is a diagram showing a normal transmission / reception operation timing in the embodiment of the present invention.
According to this, normally, the mobile station 1 and the base station 2 are 5 ms
Transmission / reception is performed alternately every time, and the ADPCM signal of the transmitted / received audio signal data is 160 bits per slot, so the transmission rate is 32 Kbps (160 bits / 5 m
S) is required. This state is shown in b and c of FIG.

【0025】ここで、本発明実施例における移動局2の
動作について図1を参照して説明する。
Here, the operation of the mobile station 2 in the embodiment of the present invention will be described with reference to FIG.

【0026】移動局1の制御部100は、ダイヤルボタ
ン部114のボタン検出、タイマー部113の制御、お
よびTDMA/TDD(時分割多元接続/時分割二重)
処理部101の制御を行う。TDMA/TDD処理部1
01は、送受話器109とのアナログ信号のディジタル
符号化信号への変換およびディジタル符号化信号のアナ
ログ信号への変換を行う音声信号処理部108からのデ
ィジタル信号をTDMA/TDD信号に変調または復調
する制御処理を行う。このTDMA/TDD処理部10
1により無線信号に重畳するTDMA/TDDのシリア
ル信号の生成が行われる。
The control unit 100 of the mobile station 1 detects the buttons of the dial button unit 114, controls the timer unit 113, and TDMA / TDD (time division multiple access / time division duplex).
The processing unit 101 is controlled. TDMA / TDD processing unit 1
01 modulates or demodulates a digital signal from the voice signal processing unit 108 for converting an analog signal with the handset 109 into a digital coded signal and a digital coded signal into an analog signal into a TDMA / TDD signal. Perform control processing. This TDMA / TDD processing unit 10
1 generates a TDMA / TDD serial signal to be superimposed on the radio signal.

【0027】TDMA/TDD処理部101により生成
された送信信号は、無線信号変調部102および送信増
幅部103を経て、送受信切替部106よりアンテナ1
07を介して基地局2に無線信号が送出される。基地局
2から受信した無線信号は、アンテナ107を介して受
信され送受信切替部106、受信増幅部105、無線信
号復調部104を経てTDMA/TDD処理部101に
入力される。TDMA/TDD処理部101では、この
基地局2からの受信信号に基づきTDMA/TDD処理
部101の同期タイミングの同期をとり送受信タイミン
グの生成を行う。
The transmission signal generated by the TDMA / TDD processing unit 101 passes through the radio signal modulation unit 102 and the transmission amplification unit 103, and is transmitted from the transmission / reception switching unit 106 to the antenna 1
A radio signal is transmitted to the base station 2 via the network 07. The radio signal received from the base station 2 is received via the antenna 107 and is input to the TDMA / TDD processing unit 101 via the transmission / reception switching unit 106, the reception amplification unit 105, and the radio signal demodulation unit 104. The TDMA / TDD processing unit 101 synchronizes the synchronization timing of the TDMA / TDD processing unit 101 based on the received signal from the base station 2 and generates transmission / reception timing.

【0028】続いて、移動局1の電源制御について説明
する。移動局1内にある電池110は、タイマー部11
3と電源制御部112とに接続され、電源制御部112
から無線部、制御部の各回路部に電源が供給される。ま
た、電池110は電池容量検出部111に接続され、そ
の電池容量の情報は制御部100に常に通知される。電
源制御部112は、タイマー部113からの制御の起動
により電池110の電源を無線部、制御部の各回路部に
対してON、またはOFFの制御を行う。すなわち、移
動局1の使用者が電源ボタン115をONにして動作状
態となった場合に、タイマー部113は、まず電源制御
部112に対して移動局1の各回路部への電源供給の起
動を行う。
Next, power control of the mobile station 1 will be described. The battery 110 in the mobile station 1 has a timer 11
3 and the power control unit 112
The power is supplied to the respective circuit units of the wireless unit and the control unit from. The battery 110 is connected to the battery capacity detection unit 111, and information on the battery capacity is always notified to the control unit 100. The power supply control unit 112 controls the power supply of the battery 110 to be turned on or off for each circuit unit of the wireless unit and the control unit by starting the control from the timer unit 113. That is, when the user of the mobile station 1 turns on the power button 115 to enter the operating state, the timer unit 113 first activates the power supply control unit 112 to supply power to each circuit unit of the mobile station 1. I do.

【0029】制御部100は、TDMA/TDD処理部
101およびダイヤルボタン部115からの情報の検出
を行う。制御部100では、基地局2からの着信もな
く、また移動局1の使用者からのダイヤルボタン押下情
報もない場合、すなわち、待ち受け状態と判断した場
合、タイマー部113に間欠時間のタイマー値を設定す
る。このタイマー部113の起動は、TDMA/TDD
処理部101によって基地局2から受信した同期タイミ
ングで行われる。
The control unit 100 detects information from the TDMA / TDD processing unit 101 and the dial button unit 115. In the control unit 100, when there is no incoming call from the base station 2 and there is no dial button press information from the user of the mobile station 1, that is, when it is determined that the mobile station 1 is in the standby state, the timer unit 113 sets the timer value of the intermittent time to the timer unit 113. Set. The activation of the timer unit 113 is performed according to TDMA / TDD.
It is performed at the synchronization timing received from the base station 2 by the processing unit 101.

【0030】このような制御によりタイマー部113
は、まず電源制御部112の電源断の制御を行い、タイ
マー部113以外のすべての回路部分への電源供給を遮
断する。タイマー部113は常に電池110により電源
が供給されているためカウント動作を行うことができ
る。このタイマー部113の消費電力はごくわずかなた
め電池の消耗には殆ど影響を与えない。
By such control, the timer unit 113
First, the power supply control unit 112 is controlled to cut off the power supply, and the power supply to all circuit parts other than the timer unit 113 is cut off. The timer unit 113 can perform a counting operation because power is always supplied from the battery 110. Since the power consumption of the timer unit 113 is very small, it hardly affects the consumption of the battery.

【0031】タイマー部113は、カウンターがタイム
アップしたとき、すなわち、基地局2からの受信タイミ
ングの直前となったとき、電源制御部112に対して通
電の制御を行い全ての回路に電源の供給を行う。この制
御により再び制御部、無線部に電源が供給され基地局2
との受信が可能となる。なお、移動局1が通話中になっ
た場合、制御部100はタイマー部113に対する制御
を停止し、電源制御部112は各回路部への電源供給を
行う制御に移行する。
The timer unit 113 controls power supply to the power supply control unit 112 and supplies power to all circuits when the time of the counter is up, that is, immediately before the reception timing from the base station 2. I do. By this control, power is again supplied to the control unit and the radio unit, and the base station 2
Can be received. When the mobile station 1 is busy, the control unit 100 stops controlling the timer unit 113, and the power control unit 112 shifts to control for supplying power to each circuit unit.

【0032】このような制御により、移動局1は待ち受
け時において間欠受信を行いバッテリィーセービングが
可能になる。
With such control, the mobile station 1 performs intermittent reception during standby to perform battery saving.

【0033】ここで、本発明の特徴とするところの電池
容量低下時の動作について説明する。
Here, the operation when the battery capacity is low, which is a feature of the present invention, will be described.

【0034】移動局1の通話中に電池110の容量が低
下した場合、電池容量検出部111が制御部100に対
し電池容量の低下を示す情報を通知する。この情報を制
御部100が受信すると、図3に示す制御データ上に無
線通信の伝送速度を1/2、または1/4に変更する要
求データをTDMA/TDD処理部101に対して設定
する。この制御データは、前述したように移動局1の無
線部を通して基地局2に無線信号により受信される。
When the capacity of the battery 110 is lowered during the call of the mobile station 1, the battery capacity detection unit 111 notifies the control unit 100 of information indicating the decrease of the battery capacity. When this information is received by the control unit 100, request data for changing the transmission rate of wireless communication to 1/2 or 1/4 is set in the control data shown in FIG. 3 for the TDMA / TDD processing unit 101. This control data is received by the base station 2 as a radio signal through the radio unit of the mobile station 1 as described above.

【0035】他方、基地局2において無線通信の伝送速
度の変更要求を検出すると、同様に制御データを使用し
て応答信号を返送し、送受信タイミングの移動局1の要
求のあった伝送速度により同期バースト信号の送出を行
う。移動局1においても基地局2の応答信号を受信後、
基地局2の同期バースト信号を待ち、再同期確立後に無
線通信の伝送速度の変更を行う。この制御は図4による
と、移動局1と基地局2との送受信タイミングは通常の
5mS毎の送受信タイミングであるbおよびcに対し、
移動局1の電池容量の低下に伴い10mS(同図dおよ
びe)、あるいは20mS(同図fおよびg)の送受信
タイミングとなる。
On the other hand, when the base station 2 detects a request for changing the transmission rate of the wireless communication, it similarly returns a response signal using the control data, and synchronizes with the transmission rate requested by the mobile station 1 for transmission / reception timing. Transmits a burst signal. After the mobile station 1 also receives the response signal of the base station 2,
The base station 2 waits for a synchronization burst signal, and after resynchronization is established, the transmission rate of wireless communication is changed. According to FIG. 4, the transmission / reception timing between the mobile station 1 and the base station 2 is different from the transmission / reception timings b and c which are normal transmission / reception timings every 5 ms.
As the battery capacity of the mobile station 1 decreases, the transmission / reception timing becomes 10 mS (d and e in FIG. 4) or 20 mS (f and g in FIG. 5).

【0036】図5は本発明実施例における無線通信の伝
送速度の変更に従うPCM信号とADPCM信号の関係
を示したものである。この図5によると、64KbpsのP
CM信号は32KbpsのADPCM信号に変換する場合
は、8ビットを圧縮符号化の4ビットに変換し、さら
に、16Kbpsあるいは8Kbpsにおいては同様にして演算
処理により高能率圧縮符号化して16Kbps、あるいは8
KbpsのADPCM信号を生成する。
FIG. 5 shows the relationship between the PCM signal and the ADPCM signal according to the change in the transmission speed of the wireless communication in the embodiment of the present invention. According to this Fig. 5, P of 64 Kbps
When the CM signal is converted to a 32 Kbps ADPCM signal, 8 bits are converted to 4 bits for compression coding, and at 16 Kbps or 8 Kbps, high-efficiency compression coding is similarly performed by arithmetic processing to 16 Kbps or 8 Kbps.
A Kbps ADPCM signal is generated.

【0037】無線通信における音声符号化データは、こ
の各々の伝送速度のADPCM信号を使用することによ
り実現されている。すなわち、音声符号データは、前述
したように1スロット当り160ビットであるため、1
0mSまたは20mS毎に送受信することにより、伝送
速度は各々16Kbps(160ビット/10mS)、また
は8Kbps(160ビット/20mS)に重畳することが
可能となる。なお、逆にADPCM信号をPCM信号に
逆変換する場合も同様な手順により行われ、64Kbpsの
PCM信号を再生することができる。
Voice coded data in wireless communication is realized by using ADPCM signals of respective transmission rates. That is, since the voice code data has 160 bits per slot as described above, 1
By transmitting and receiving every 0 mS or 20 mS, the transmission speed can be superimposed on 16 Kbps (160 bits / 10 mS) or 8 Kbps (160 bits / 20 mS), respectively. On the contrary, when the ADPCM signal is inversely converted into the PCM signal, the same procedure is performed and the PCM signal of 64 Kbps can be reproduced.

【0038】[0038]

【発明の効果】以上説明したように本発明によれば、移
動局の電池が放電終了近くになった場合に、移動局と基
地局との無線通信の伝送速度を通常の半分もしくは1/
4の伝送速度となるように制御し、移動局から送出する
送信信号の頻度を少なくすることにより、送信による電
池の消費を軽減することができ、それに伴って移動局の
使用時間の長期化をはかり、使用上の便宜性を改善する
ことができる効果がある。
As described above, according to the present invention, when the battery of the mobile station is nearing the end of discharging, the transmission speed of the radio communication between the mobile station and the base station is reduced to half or 1 / the normal rate.
By controlling the transmission rate to be 4 and reducing the frequency of the transmission signal transmitted from the mobile station, it is possible to reduce the battery consumption due to the transmission, and accordingly to prolong the usage time of the mobile station. This has the effect of improving convenience in weighing and use.

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

【図1】本発明実施例における移動局の構成を示すブロ
ック図。
FIG. 1 is a block diagram showing a configuration of a mobile station according to an embodiment of the present invention.

【図2】本発明実施例における基地局の構成を示すブロ
ック図。
FIG. 2 is a block diagram showing a configuration of a base station according to the embodiment of the present invention.

【図3】本発明実施例におけるパケットデータの構成を
示す図。
FIG. 3 is a diagram showing a structure of packet data in the embodiment of the present invention.

【図4】本発明実施例における通常時の動作タイミング
を示す図。
FIG. 4 is a diagram showing normal operation timings in the embodiment of the present invention.

【図5】本発明実施例における無線通信の伝送速度の変
更に従うPCM信号とADPCM信号の関係を示す図。
FIG. 5 is a diagram showing a relationship between a PCM signal and an ADPCM signal according to a change in the transmission speed of wireless communication in the embodiment of the present invention.

【図6】TDMA/TDD方式による送受信動作タイミ
ングを説明する図。
FIG. 6 is a diagram for explaining transmission / reception operation timing according to the TDMA / TDD system.

【図7】TDMA/TDD方式による通話タイミングを
示す図。
FIG. 7 is a diagram showing call timing according to the TDMA / TDD system.

【図8】バッテリセービングの動作タイミングを説明す
る図。
FIG. 8 is a diagram illustrating an operation timing of battery saving.

【符号の説明】[Explanation of symbols]

1 移動局 2 基地局 100 制御部 101 TDMA/TDD処理部 102 無線信号変調部 103 送信増幅部 104 無線信号復調部 105 受信増幅部 106 送受信切替部 107 アンテナ 108 音声信号処理部 109 送受話器 110 電池 111 電池容量検出部 112 電源制御部 113 タイマー部 114 ダイヤルボタン部 115 電源ボタン 200 主制御部 209 回線インタフェース部 210 有線電話回線 1 mobile station 2 base station 100 control unit 101 TDMA / TDD processing unit 102 radio signal modulation unit 103 transmission amplification unit 104 radio signal demodulation unit 105 reception amplification unit 106 transmission / reception switching unit 107 antenna 108 voice signal processing unit 109 handset 110 battery 111 Battery capacity detection unit 112 Power control unit 113 Timer unit 114 Dial button unit 115 Power button 200 Main control unit 209 Line interface unit 210 Wired telephone line

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 基地局と移動局との間に、TDMA方式
により時分割多重無線通信回線が設定されたディジタル
無線通信方式において、 前記基地局および前記移動局には、前記移動局からの要
求にしたがって前記通信回線の伝送速度を低減させる制
御手段を備えたことを特徴とするディジタル無線通信方
式。
1. In a digital wireless communication system in which a time division multiplex wireless communication line is set up by a TDMA system between a base station and a mobile station, the base station and the mobile station are requested by the mobile station. According to the above, there is provided a control means for reducing the transmission speed of the communication line according to the above.
【請求項2】 前記移動局には、電池の容量を検出する
手段を備え、この容量が所定値以下になったときに伝送
速度を低減させる要求を発生する手段を備えた請求項1
記載のディジタル無線通信方式。
2. The mobile station comprises means for detecting the capacity of the battery, and means for generating a request to reduce the transmission rate when the capacity becomes less than or equal to a predetermined value.
The described digital wireless communication system.
【請求項3】 前記伝送速度は、標準伝送速度に対して
2分の1毎に複数の段階に設定される請求項2記載のデ
ィジタル無線通信方式。
3. The digital wireless communication system according to claim 2, wherein the transmission rate is set in a plurality of steps every half of the standard transmission rate.
【請求項4】 前記基地局は有線電話回線に固定的に接
続された親電話機であり、前記移動局はこの親電話機に
前記無線通信回線を介して接続される子機である請求項
2記載のディジタル無線通信方式。
4. The base station is a master phone fixedly connected to a wire telephone line, and the mobile station is a slave device connected to the master phone via the wireless communication line. Digital wireless communication system.
JP6203895A 1994-08-29 1994-08-29 Digital wireless communication system Expired - Fee Related JP2606595B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6203895A JP2606595B2 (en) 1994-08-29 1994-08-29 Digital wireless communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6203895A JP2606595B2 (en) 1994-08-29 1994-08-29 Digital wireless communication system

Publications (2)

Publication Number Publication Date
JPH0870273A true JPH0870273A (en) 1996-03-12
JP2606595B2 JP2606595B2 (en) 1997-05-07

Family

ID=16481499

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6203895A Expired - Fee Related JP2606595B2 (en) 1994-08-29 1994-08-29 Digital wireless communication system

Country Status (1)

Country Link
JP (1) JP2606595B2 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6084861A (en) * 1996-08-23 2000-07-04 Uniden Corporation Radio communication system
WO2000074292A1 (en) * 1999-05-31 2000-12-07 Samsung Electronics Co., Ltd. Apparatus and method for gated transmission in cdma communication system
GB2355367A (en) * 1999-10-13 2001-04-18 Ericsson Telefon Ab L M Adjusting allocation of transmission slots according operating conditions in a mobile telephone
KR100357014B1 (en) * 1999-06-15 2002-10-19 닛본 덴기 가부시끼가이샤 Mobile terminal, mobile communication system, and power consumption suppressing method for mobile terminal
US6618596B1 (en) 1998-06-29 2003-09-09 Nec Corporation Communication system, apparatus, method, and recording medium for mobile communication
US6909905B2 (en) 1999-12-28 2005-06-21 Ntt Docomo, Inc. Mobile communications control including change of bit rate based on traffic and transmit power
US7027843B2 (en) * 2002-03-21 2006-04-11 Lenovo (Singapore) Pte. Ltd. Wireless device power optimization
US7062250B1 (en) 1998-07-29 2006-06-13 Denso Corporation Radio communication terminal having variable data transmission speed responsive to built-in battery power
JP2009538062A (en) * 2006-05-18 2009-10-29 クゥアルコム・インコーポレイテッド Interlace-based control channel balancing in wireless communication networks

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6335026A (en) * 1985-07-31 1988-02-15 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ Digital radio transmission system
JPH03220828A (en) * 1990-01-25 1991-09-30 Matsushita Electric Ind Co Ltd Wireless monitoring equipment
JPH04504939A (en) * 1989-04-27 1992-08-27 モトローラ・インコーポレーテッド Digital wireless communication systems and two-way radios

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6335026A (en) * 1985-07-31 1988-02-15 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ Digital radio transmission system
JPH04504939A (en) * 1989-04-27 1992-08-27 モトローラ・インコーポレーテッド Digital wireless communication systems and two-way radios
JPH03220828A (en) * 1990-01-25 1991-09-30 Matsushita Electric Ind Co Ltd Wireless monitoring equipment

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6084861A (en) * 1996-08-23 2000-07-04 Uniden Corporation Radio communication system
US6618596B1 (en) 1998-06-29 2003-09-09 Nec Corporation Communication system, apparatus, method, and recording medium for mobile communication
US7062250B1 (en) 1998-07-29 2006-06-13 Denso Corporation Radio communication terminal having variable data transmission speed responsive to built-in battery power
US6917607B1 (en) 1999-05-31 2005-07-12 Samsung Electronics Co., Ltd. Apparatus and method for gated transmission in CDMA communication system
AU757471B2 (en) * 1999-05-31 2003-02-20 Samsung Electronics Co., Ltd. Apparatus and method for gated transmission in CDMA communication system
WO2000074292A1 (en) * 1999-05-31 2000-12-07 Samsung Electronics Co., Ltd. Apparatus and method for gated transmission in cdma communication system
KR100357014B1 (en) * 1999-06-15 2002-10-19 닛본 덴기 가부시끼가이샤 Mobile terminal, mobile communication system, and power consumption suppressing method for mobile terminal
US6898438B1 (en) 1999-06-15 2005-05-24 Nec Corporation Mobile terminal, mobile communication system, and power consumption suppressing method for mobile terminal
JP2003511950A (en) * 1999-10-13 2003-03-25 テレフオンアクチーボラゲツト エル エム エリクソン Wireless transceiver
GB2355367A (en) * 1999-10-13 2001-04-18 Ericsson Telefon Ab L M Adjusting allocation of transmission slots according operating conditions in a mobile telephone
US6934267B1 (en) 1999-10-13 2005-08-23 Telefonaktiebolaget L M Ericsson (Publ) Time slot allocation control based on temperature in a radio transceiver
US6909905B2 (en) 1999-12-28 2005-06-21 Ntt Docomo, Inc. Mobile communications control including change of bit rate based on traffic and transmit power
US7027843B2 (en) * 2002-03-21 2006-04-11 Lenovo (Singapore) Pte. Ltd. Wireless device power optimization
JP2009538062A (en) * 2006-05-18 2009-10-29 クゥアルコム・インコーポレイテッド Interlace-based control channel balancing in wireless communication networks
US8295252B2 (en) 2006-05-18 2012-10-23 Qualcomm Incorporated Interlace-based control channel balancing in a wireless communication network

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