JPH06252798A - Portable radio telephone - Google Patents
Portable radio telephoneInfo
- Publication number
- JPH06252798A JPH06252798A JP5039970A JP3997093A JPH06252798A JP H06252798 A JPH06252798 A JP H06252798A JP 5039970 A JP5039970 A JP 5039970A JP 3997093 A JP3997093 A JP 3997093A JP H06252798 A JPH06252798 A JP H06252798A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- reception
- frequency
- mobile station
- control channel
- 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
Links
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Transceivers (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、電池を電源とする携帯
無線電話において、受信待機時に消費電流が多いＰＬＬ
回路の代わりに、消費電流の少ない水晶発振回路を使用
した携帯無線電話に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PLL which consumes a large amount of current when waiting for reception in a portable radio telephone using a battery as a power source.
The present invention relates to a mobile radio telephone using a crystal oscillation circuit with low current consumption instead of the circuit.
【０００２】[0002]
【従来の技術】基地局との間で通信して、一般の加入電
話等に通話できる携帯無線電話は、時間や場所を選ばず
に通話できるので、近年、急激に普及している。携帯無
線電話の使用する無線システムは、一般に、多数の移動
局が同時に使用できるように、通話状態を制御する少数
の制御チャネルと、実際に通話する多数の通話チャネル
とで構成されている。このため、携帯無線電話は、多数
の周波数の電波を送受信する必要性から、ＰＬＬ(Ｐhas
e Ｌocked Ｌoop)回路を使用するのが一般的である。2. Description of the Related Art Portable radio telephones that can communicate with a base station to make a call to a general subscriber telephone or the like can make a call at any time and at any place, and have been rapidly popularized in recent years. A radio system used by a mobile radio telephone is generally composed of a small number of control channels for controlling a call state and a large number of call channels for actual calls so that a large number of mobile stations can use the mobile stations at the same time. For this reason, the mobile radio telephone is required to send and receive radio waves of many frequencies, and therefore the PLL (Phas
It is common to use an e Locked Loop circuit.
【０００３】図３は従来の携帯無線電話のブロック図
で、１は送受信兼用のアンテナ、２は送信と受信とを同
時にできるようにしたデュープレクサ、３は送信回路、
４は受信回路、５は携帯無線電話の動作を制御するＣＰ
Ｕ、６は送信周波数及び受信周波数の信号を発生するＰ
ＬＬ回路、７は送信回路３の動作を制御するスタンバイ
回路である。FIG. 3 is a block diagram of a conventional portable radio telephone, 1 is an antenna for both transmission and reception, 2 is a duplexer capable of transmitting and receiving at the same time, 3 is a transmitting circuit,
4 is a receiving circuit, 5 is a CP for controlling the operation of the mobile radio telephone
U and 6 are P for generating signals of transmission frequency and reception frequency
The LL circuit, 7 is a standby circuit that controls the operation of the transmission circuit 3.
【０００４】図４は従来の携帯無線電話の各動作で使用
する周波数の一覧表で、各動作状態で送信回路及び受信
回路が制御チャネル受信周波数ｆ0，制御チャネル送信
周波数ｆ1，通話チャネル受信周波数ｆ2及び通話チャネ
ル送信周波数ｆ3の各周波数で動作していることを示す
ものである。FIG. 4 is a list of frequencies used in each operation of the conventional portable radio telephone. In each operation state, the transmission circuit and the reception circuit receive the control channel reception frequency f 0 , the control channel transmission frequency f 1 , and the speech channel reception. It shows that the operation is performed at each frequency of the frequency f 2 and the communication channel transmission frequency f 3 .
【０００５】以下、従来の携帯無線電話の動作につい
て、図３及び図４を参照しながら説明する。携帯無線電
話は、自局(以下「移動局」という)が存在することを基
地局に認識させるために、制御チャネルを使用して、基
地局に動作情報を登録するための送信動作を行う。そこ
で、移動局に電話が掛かってきたときには、基地局はこ
のときに登録された移動局の動作情報を使用して、移動
局を呼び出した上、通話ができるようにする。The operation of the conventional portable radio telephone will be described below with reference to FIGS. 3 and 4. The mobile radio telephone performs a transmission operation for registering operation information in the base station using the control channel in order to make the base station recognize that its own station (hereinafter referred to as “mobile station”) exists. Therefore, when a call is made to the mobile station, the base station uses the operation information of the mobile station registered at this time to call the mobile station and enable the call.
【０００６】そして、移動局の基地局への動作情報の登
録が終了すると、受信待機状態に入るが、いつ基地局か
ら呼び出されるのか分からないので、予め定められた制
御チャネル受信周波数ｆ0で受信し続けなければならな
いが、送信回路３は動作させる必要がない。そこで、Ｃ
ＰＵ５は、受信回路４及びＰＬＬ回路６を動作させ、送
信回路３をスタンバイ状態(休止状態)にして、消費電流
を低減させる。When the registration of the operation information of the mobile station to the base station is completed, the mobile station enters the reception standby state, but since it is not known when the base station is called, reception is performed at the predetermined control channel reception frequency f 0 . However, the transmitter circuit 3 does not need to be operated. So C
The PU 5 operates the receiving circuit 4 and the PLL circuit 6 and puts the transmitting circuit 3 in a standby state (sleep state) to reduce current consumption.
【０００７】そして、移動局が、発信又は着信の動作を
行うときには、制御チャネル受信周波数ｆ0及び制御チ
ャネル送信周波数ｆ1を使用して、基地局と交信した
上、基地局と移動局との間で通話ができる状態になる
と、制御チャネルの混信を防止するために、移動局の周
波数を通話チャネル受信周波数ｆ2及び通話チャネル送
信周波数ｆ3に変更して、通話できるようにする。When the mobile station makes an outgoing call or an incoming call, it communicates with the base station using the control channel reception frequency f 0 and the control channel transmission frequency f 1 , and the base station and the mobile station communicate with each other. When a call becomes possible between the two, the frequency of the mobile station is changed to the call channel reception frequency f 2 and the call channel transmission frequency f 3 to prevent the control channel interference so that the call can be performed.
【０００８】その後、通話が終了すると、移動局は再
び、制御チャネル受信周波数ｆ0の受信動作のみを行う
受信待機状態に戻る。After that, when the call ends, the mobile station returns to the reception standby state in which only the control channel reception frequency f 0 is received.
【０００９】[0009]
【発明が解決しようとする課題】ところで、携帯無線電
話のシステムは多数の周波数を使用するため、多くの周
波数を簡単に発生できるＰＬＬ回路が使用されている
が、ＰＬＬ回路は消費電流が多い上、受信待機状態でも
連続して動作しているため、電池の消耗が早いという問
題があった。By the way, since the portable radio telephone system uses a large number of frequencies, a PLL circuit capable of easily generating a large number of frequencies is used. However, the PLL circuit consumes a large amount of current. However, there is a problem that the battery runs out quickly because it operates continuously even in the reception standby state.
【００１０】本発明は、このような問題に鑑みてなされ
たもので、使用時間の大部分を占める受信待機状態での
消費電流を低減させて、交換或いは充電した電池が長時
間使用できる携帯無線電話を提供することを目的として
いる。The present invention has been made in view of the above problems, and reduces the current consumption in the reception standby state, which occupies most of the operating time, so that a battery that has been replaced or charged can be used for a long time. It is intended to provide a telephone.
【００１１】[0011]
【課題を解決するための手段】本発明は、送受信時には
ＰＬＬ回路を使用し、受信待機状態時には水晶発振回路
を使用するようにしたものである。According to the present invention, a PLL circuit is used during transmission / reception, and a crystal oscillation circuit is used during a reception standby state.
【００１２】[0012]
【作用】本発明によれば、受信待機状態時に消費電流の
少ない水晶発振回路を使用することにより、携帯無線電
話の使用時間の大部分を占める受信待機状態での消費電
流が低減されて、交換或いは充電した電池が長時間使用
できるようになる。According to the present invention, by using the crystal oscillating circuit which consumes less current in the reception standby state, the consumption current in the reception standby state, which occupies most of the operating time of the portable radio telephone, is reduced and the replacement is performed. Alternatively, the charged battery can be used for a long time.
【００１３】[0013]
【実施例】以下、図面を参照しながら、本発明の実施例
を詳細に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【００１４】図１は本発明の一実施例の構成を示すもの
で、図３の参照符号と同一符号のものは同一部分を示し
ており、又、８は水晶発振回路、９はＰＬＬ回路６の動
作を制御するスタンバイ回路、10は水晶発振回路８の動
作を制御するスタンバイ回路、11はＣＰＵ５によってＰ
ＬＬ回路６と水晶発振回路８との出力を切り換えるスイ
ッチである。FIG. 1 shows the configuration of an embodiment of the present invention. Reference numerals in FIG. 3 which are the same as those in FIG. 3 denote the same parts, 8 is a crystal oscillation circuit, and 9 is a PLL circuit 6. A standby circuit for controlling the operation of the crystal oscillator circuit 10, a standby circuit 10 for controlling the operation of the crystal oscillation circuit 8, and a CPU 5 for controlling the operation of the crystal oscillator circuit 8.
This is a switch for switching the outputs of the LL circuit 6 and the crystal oscillation circuit 8.
【００１５】図２は本発明の一実施例の各動作で使用す
る周波数の一覧表で、各動作状態で送信回路及び受信回
路が制御チャネル受信周波数ｆ0，制御チャネル送信周
波数ｆ1，通話チャネル受信周波数ｆ2及び通話チャネル
送信周波数ｆ3の各周波数で動作していることを示すも
のである。FIG. 2 is a list of frequencies used in each operation of one embodiment of the present invention. In each operation state, the transmission circuit and the reception circuit have a control channel reception frequency f 0 , a control channel transmission frequency f 1 , and a speech channel. It shows that the operation is performed at each frequency of the reception frequency f 2 and the communication channel transmission frequency f 3 .
【００１６】以下、本発明の一実施例の動作について、
図１及び図２を参照しながら説明する。携帯無線電話
は、自局(以下「移動局」という)が存在することを基地
局に認識させるために、制御チャネルを使用して、基地
局に動作情報を登録するための送信動作を行う。そこ
で、移動局に電話が掛かってきたときには、基地局はこ
のときに登録された移動局の動作情報を使用して、移動
局を呼び出した上、通話ができるようにする。The operation of one embodiment of the present invention will be described below.
This will be described with reference to FIGS. 1 and 2. The mobile radio telephone performs a transmission operation for registering operation information in the base station using the control channel in order to make the base station recognize that its own station (hereinafter referred to as “mobile station”) exists. Therefore, when a call is made to the mobile station, the base station uses the operation information of the mobile station registered at this time to call the mobile station and enable the call.
【００１７】そして、移動局の基地局への動作情報の登
録が終了すると、受信待機状態に入るが、いつ基地局か
ら呼び出されるのか分からないので、予め定められた制
御チャネル受信周波数ｆ0で受信し続けなければならな
い。When the registration of the operation information of the mobile station to the base station is completed, the mobile station enters the reception standby state, but since it is not known when the base station calls the mobile station, the control channel reception frequency f 0 is received. Have to continue.
【００１８】ところで、この制御チャネル受信周波数ｆ
0は、予め知ることができる。そこで、消費電流が多い
ＰＬＬ回路６はスタンバイ回路９によってスタンバイ
(休止)状態にしておくと共に、消費電流が少ない水晶発
振回路８の側にスイッチ11を切り換えて、受信待機す
る。By the way, this control channel reception frequency f
0 can be known in advance. Therefore, the PLL circuit 6, which consumes a large amount of current, is put into standby by the standby circuit 9.
The switch 11 is switched to the side of the crystal oscillating circuit 8 that consumes less current, while keeping the (pause) state, and stands by for reception.
【００１９】又、移動局が発信又は受信の動作を行う場
合、制御チャネル受信周波数ｆ0の受信時には、水晶発
振回路８の出力を使用し、制御チャネル送信周波数ｆ1
の送信時には、ＰＬＬ回路６の出力を使用するように、
ＣＰＵ５がスイッチ11を適宜切り換えて、基地局と交信
した上、基地局と移動局との間で通話ができる状態にな
ると、制御チャネルの混信を防止するために、スイッチ
11を切り換えて、移動局の周波数をＰＬＬ回路６で通話
チャネル受信周波数ｆ2及び通話チャネル送信周波数ｆ3
に変更することにより、通話できるようにする。Further, when the mobile station performs the transmitting or receiving operation, when the control channel reception frequency f 0 is received, the output of the crystal oscillation circuit 8 is used and the control channel transmission frequency f 1
To use the output of the PLL circuit 6 when transmitting
When the CPU 5 switches the switch 11 as appropriate to communicate with the base station and when a call is ready between the base station and the mobile station, the switch is used to prevent interference of the control channel.
11 is switched, and the frequency of the mobile station is set by the PLL circuit 6 to the communication channel reception frequency f 2 and the communication channel transmission frequency f 3
Allows you to make calls by changing to.
【００２０】その後、通話が終了すると、移動局はスイ
ッチ11を切り換えて、水晶発振回路８を動作させること
により、制御チャネル受信周波数ｆ0の受信動作のみを
行う受信待機状態に戻すと共に、ＰＬＬ回路６をスタン
バイ状態に移行させる。Thereafter, when the call ends, the mobile station switches the switch 11 to operate the crystal oscillating circuit 8 to return to the reception standby state in which only the reception operation of the control channel reception frequency f 0 is performed and the PLL circuit. 6 is shifted to the standby state.
【００２１】[0021]
【発明の効果】以上説明したように、本発明によれば、
受信待機状態時に消費電流の少ない水晶発振回路を使用
することにより、携帯無線電話の使用時間の大部分を占
める受信待機状態での消費電流が低減されて、交換或い
は充電した電池が長時間使用できるようになるという効
果を奏する。As described above, according to the present invention,
By using a crystal oscillator circuit that consumes less current in the reception standby state, the consumption current in the reception standby state, which occupies most of the operating time of the mobile wireless telephone, is reduced, and the replaced or charged battery can be used for a long time. It has the effect that
【図１】本発明の一実施例の構成を示すブロック図であ
る。FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.
【図２】本発明の一実施例の各動作で使用する周波数の
一覧表である。FIG. 2 is a list of frequencies used in each operation of one embodiment of the present invention.
【図３】従来の携帯無線電話の構成を示すブロック図で
ある。FIG. 3 is a block diagram showing a configuration of a conventional portable wireless telephone.
【図４】従来の携帯無線電話の各動作で使用する周波数
の一覧表である。FIG. 4 is a list of frequencies used in each operation of a conventional mobile wireless phone.
１…送受信アンテナ、 ２…デュープレクサ、 ３…送
信回路、 ４…受信回路、 ５…ＣＰＵ、 ６…ＰＬＬ
回路、 ７，９，10…スタンバイ回路、 ８…水晶発振
回路、 11…スイッチ。DESCRIPTION OF SYMBOLS 1 ... Transmitting / receiving antenna, 2 ... Duplexer, 3 ... Transmitting circuit, 4 ... Receiving circuit, 5 ... CPU, 6 ... PLL
Circuit, 7, 9, 10 ... Standby circuit, 8 ... Crystal oscillator circuit, 11 ... Switch.
Claims (2)
び受信を行う携帯無線電話において、 第１の発振回路と、 該第１の発振回路よりも消費電流の小さい第２の発振回
路とを有し、 受信のみを行うときには、前記第２の発振回路のみを動
作させ、送信状態に移行したときには前記第１の発振回
路のみを動作させて、受信時の消費電流を低減させるこ
とを特徴とする携帯無線電話。1. A portable radiotelephone for transmitting and receiving radio waves of at least two frequencies, comprising a first oscillating circuit and a second oscillating circuit consuming less current than the first oscillating circuit. A mobile phone characterized in that only the second oscillating circuit is operated when only receiving is performed, and only the first oscillating circuit is operated when shifting to a transmitting state to reduce current consumption during reception. Wireless phone.
り、前記第２の発振回路は水晶発振回路であることを特
徴とする請求項１記載の携帯無線電話。2. The portable radio telephone according to claim 1, wherein the first oscillation circuit is a PLL circuit, and the second oscillation circuit is a crystal oscillation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5039970A JPH06252798A (en) | 1993-03-01 | 1993-03-01 | Portable radio telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5039970A JPH06252798A (en) | 1993-03-01 | 1993-03-01 | Portable radio telephone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06252798A true JPH06252798A (en) | 1994-09-09 |
Family
ID=12567818
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5039970A Pending JPH06252798A (en) | 1993-03-01 | 1993-03-01 | Portable radio telephone |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06252798A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6272116B1 (en) | 1997-06-27 | 2001-08-07 | Nec Corporation | Power saving device |
| JP2002050963A (en) * | 2000-06-28 | 2002-02-15 | Stmicroelectronics Nv | Process and apparatus for reducing power consumption of digital information transmitting/receiving device |
| US6677826B2 (en) | 2001-01-22 | 2004-01-13 | Fujitsu Limited | Controlling equipment and radio equipment |
-
1993
- 1993-03-01 JP JP5039970A patent/JPH06252798A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6272116B1 (en) | 1997-06-27 | 2001-08-07 | Nec Corporation | Power saving device |
| JP2002050963A (en) * | 2000-06-28 | 2002-02-15 | Stmicroelectronics Nv | Process and apparatus for reducing power consumption of digital information transmitting/receiving device |
| US6677826B2 (en) | 2001-01-22 | 2004-01-13 | Fujitsu Limited | Controlling equipment and radio equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7979097B2 (en) | Power management for multimode wireless communication device | |
| US5438701A (en) | Mobile radio apparatus | |
| JP3056405B2 (en) | Wireless telephone for cellular system | |
| US20060142052A1 (en) | Dual-mode GSM/PHS mobile phone adopting a single antenna | |
| JP3022546B1 (en) | Wireless communication device | |
| JPH1169434A (en) | Mobile object communication equipment | |
| EP0586170B1 (en) | A mobile radio communications unit | |
| JP3135832B2 (en) | Composite terminal for mobile communication | |
| US20050277436A1 (en) | Method of enabling a dual band handset having both PHS and GSM arrangements to be ready to receive a call in standby | |
| JPH06252798A (en) | Portable radio telephone | |
| KR20020059452A (en) | Radio telecommunication apparatus, Radio telecommunication system and Telecommunication apparatus | |
| KR100243028B1 (en) | Method and apparatus for communicating between subscribers of cordless phone | |
| JPH0396134A (en) | Radio telephone set | |
| JPH06311101A (en) | Portable radio telephone system | |
| KR100379836B1 (en) | Mobile communication terminal compatible with local area communications | |
| JPH08116301A (en) | Personal handy phone system | |
| JP3572028B2 (en) | Mobile wireless terminal | |
| JP3328220B2 (en) | Composite mobile terminal communication system and communication method thereof | |
| JP2700415B2 (en) | Wireless telephone with individual calling device | |
| JP2000349679A (en) | Composite terminal device for mobile communication | |
| KR0169422B1 (en) | Power supply control device for digital radio telephone | |
| KR0153844B1 (en) | Continuous communication method after finishing communication in a portable apparatus of wirelss telephone | |
| JP2002368671A (en) | Wireless communication terminal and wireless communication method | |
| JPS587093B2 (en) | mobile radio telephone system | |
| KR20020078380A (en) | Method for controlling sleep mode in a mobile communication terminal |