JP4239709B2 - Mobile phone - Google Patents

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Publication number
JP4239709B2
JP4239709B2 JP2003183254A JP2003183254A JP4239709B2 JP 4239709 B2 JP4239709 B2 JP 4239709B2 JP 2003183254 A JP2003183254 A JP 2003183254A JP 2003183254 A JP2003183254 A JP 2003183254A JP 4239709 B2 JP4239709 B2 JP 4239709B2
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Japan
Prior art keywords
wireless communication
level
mobile phone
antenna
electric field
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JP2003183254A
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Japanese (ja)
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JP2005020444A (en
Inventor
剛 石原
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NEC Corp
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NEC Corp
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    • 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

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  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、複数の無線通信方式で同時に待ち受けを行うことができる携帯電話機に関し、特に待ち受け時の消費電力を低減することができる携帯電話機に関する。
【0002】
【従来の技術】
複数の無線通信方式に対応した従来の携帯電話機では、小型化、軽量化のため、複数の無線通信方式に対して共通のアンテナを使用し、アンテナスイッチによっていずれかの方式を選択するようにしている(例えば、特許文献1参照。)。
【0003】
また、このアンテナスイッチとして、構造が簡単且つ小型であり、電気的にON/OFFが可能な複数のダイオードを用いたスイッチが一般に使用されるようになってきた(例えば、特許文献2参照。)。
【0004】
このような複数の無線通信方式で同時に待ち受けを行うことができる複数方式の携帯電話機は、複数の方式に対応した異なる無線機を搭載し、すべての無線通信方式をそれぞれ切り替えて待ち受けの動作を行う必要があるため電力消費が増大するという問題がある。
【0005】
【特許文献1】
特開2002−291016号公報
【特許文献2】
特開2002−305462号公報
【0006】
【発明が解決しようとする課題】
上述した従来の携帯電話機は、複数の無線通信方式をそれぞれ切り替えて待ち受けの動作を行う必要があるため電力消費が増大するという欠点がある。
【0007】
本発明の目的は、このような従来の欠点を除去するため、各無線通信方式に対応する無線機の受信電界モニターレベルが十分大きい場合には、ダイオードOFF(無通電)とするアンテナスイッチの状態を維持したままで、受信電界のレベルモニターまたは待ち受けを行うことにより、待ち受け時の電力消費を低減できる携帯電話機を提供することにある。
【0008】
【課題を解決するための手段】
本発明の携帯電話機は、複数の無線通信方式で同時に待ち受けを行うことができる携帯電話機であって、複数の無線通信方式で共用するアンテナと、複数の無線通信方式の各々に対応する複数の無線機と、無通電時に1つの無線機を選択する切り替え手段と、各無線通信方式の受信電界モニターレベルに基づいて前記切り替え手段を切替制御するCPU(中央処理装置)とを備え、前記切り替え手段は、複数のダイオードを有し、前記CPUからの制御信号OFFの時に、前記無通電時として、全てのダイオードがOFFとなり、1つの無線通信方式を選択することを特徴としている。
【0010】
また、前記CPUは、前記制御信号OFFで選択されている無線通信方式で待ち受け状態の時、他の無線通信方式の受信電界モニターレベルが所定のレベルを超えている場合には、前記制御信号OFFの状態を維持して間欠受信による受信電界レベルのモニターを行うことを特徴としている。
【0011】
また、前記CPUは、前記制御信号ONで選択されている無線通信方式で待ち受け状態の時、前記制御信号をOFFとして前記切り替え手段を切り替えて他の無線通信方式を選択している間に、前記待ち受け状態の無線通信方式の受信電界をモニターし、モニターしたレベルが所定のレベルを超えている時には、前記制御信号のOFFによって前記切り替え手段が前記他の無線通信方式を選択した状態で待ち受けを継続することを特徴としている。
【0012】
また、本発明の携帯電話機は、複数の無線通信方式で同時に待ち受けを行うことができる携帯電話機であって、選択された無線通信方式で待ち受けている際に、選択されていない他の無線通信方式の受信電界モニターレベルが所定のレベルを超えている場合には、選択されていない状態を維持して受信電界のレベルモニターまたは待ち受けを行うことを特徴としている。
【0013】
また、本発明の携帯電話機は、複数の無線通信方式で同時に待ち受けを行うことができる携帯電話機であって、共通のアンテナと、複数の無線通信方式の各々に対応する複数の無線機と、前記アンテナと前記複数の無線機のそれぞれとを接続切り替えする切り替え手段と、前記切り替え手段を制御するCPU(中央処理装置)とを有し、前記アンテナと接続されていない該無線機で間欠受信による受信電界モニターレベルが所定のレベルに満たない場合に限り前記アンテナと該無線機とを接続する制御を行うことを特徴としている。
【0014】
【発明の実施の形態】
次に、本発明の実施の形態について図面を参照して説明する。図1は、本発明の携帯電話機の一つの実施の形態を示すブロック図である。
【0015】
図1に示す本実施の形態は、アンテナ11と、アンテナスイッチ12と、方式A用無線機13と、方式B用無線機14と、アンテナスイッチ12の切り替えなどを制御するCPU(中央処理装置)16とより構成されている。
【0016】
次に、本実施の形態の携帯電話機の動作を図1を参照して詳細に説明する。
【0017】
図1によると、アンテナ11は、1つのアンテナで無線通信方式Aおよび無線通信方式Bの2つの無線通信方式での送受信が可能であり、アンテナスイッチ12とプリント基板上で電気的に接続されている。
【0018】
アンテナスイッチ12は、特開2002−305462号公報等に開示された複数のダイオードからなる高周波スイッチであり、切替制御信号15により、複数のダイオードが全てONまたはOFFとなり、無線通信方式Aまたは無線通信方式Bのいずれかを選択する。
【0019】
方式A用無線機13および方式B用無線機14は、アンテナ11を介して、基地局との間でメッセージの送受信を行う。
【0020】
CPU15は、携帯電話機が持つ機能全般の制御を行うものであり、ここでは、切替制御信号15によりアンテナスイッチ12の切り替えを制御する。
【0021】
以上の構成において、本発明の携帯電話機は、2つの無線機が2つの無線通信方式それぞれに対応し、ダイオードが全てOFFの場合に無線通信方式Aが、全てONの場合に無線通信方式Bが選択される仕様であり、また、無線通信方式Aの待ち受け中に無線通信方式Bの受信電界レベルをモニターして、電波環境の良好な方に遷移することができる仕様になっているものとする。
【0022】
なお、ダイオードが全てOFFの状態において、アンテナ11と方式A用無線機13とは無損失で接続され、アンテナ11と方式B用無線機14とはアイソレーションが例えば20dBであるものとする。
【0023】
次に、本実施の形態の携帯電話機が無線通信方式Aで待ち受け中の場合の動作について説明する。
【0024】
アンテナスイッチ12は、切替制御信号15により、全てのダイオードがOFFとなるモードで無線通信方式Aを選択し、アンテナ11と方式A用無線機13とを接続している。
【0025】
この状態で無線通信方式Bの受信電界レベルを間欠的にモニターする場合、方式B用無線機14は、アンテナスイッチ12のダイオードがOFFのままなので、アイソレーションに相当する20dBの減衰量を含んだ状態で受信電界レベルをモニターすることになる。
【0026】
ここで、無線通信方式Bの受信電界レベルがモニター可能なほど十分に大きい場合には、測定した受信電界レベルに20dBの補正を加えることで真値が得られるため、アンテナスイッチ12を切り替えることなく、方式B用無線機14はレベルモニターの継続が可能となる。一方、無線通信方式Bの受信電界レベルが小さいか、無線通信方式Bが見つからない場合には、アンテナスイッチ12を切り替えて無線通信方式Bの検波を行えば良い。
【0027】
したがって、無線通信方式Aで待ち受け中に無線通信方式Bをレベルモニターする時、無線通信方式Bの受信電界レベルが十分に大きい場合には、アンテナスイッチ12を切り替える必要がないため、ダイオードをONにするための消費電力を低減することが可能となる。
【0028】
次に、本発明の無線機が無線通信方式Bで待ち受け中の場合の動作について説明する。
【0029】
アンテナスイッチ12は、切替制御信号15により、全てのダイオードがONとなるモードで無線通信方式Bを選択し、アンテナ11と方式B用無線機14とを接続している。
【0030】
この場合には、アンテナスイッチ12を切り替えてダイオードをOFFとし、無線通信方式Aを選択している間に、無線通信方式Bの受信電界レベルをモニターする。
【0031】
無線通信方式Bの受信電界レベルが十分高くて受信可能な場合には、アンテナスイッチ12を無線通信方式Aの選択に切り替え、受信電界レベルが低い場合には、アンテナスイッチ12を無線通信方式Bの選択のままとして待ち受けを継続する。
【0032】
このようにして、無線通信方式Bで待ち受け中であっても、無線通信方式Bの受信電界レベルが十分に高い場合は、アンテナスイッチ12をOFFとして無線通信方式Aを選択にすることにより、待ち受け時の消費電力をダイオードがONとならない分だけ低減することが可能である。
【0033】
なお、無線通信方式Bで待ち受け中には間欠的に無線通信方式Aの受信電界レベルモニターを行うが、この場合、アンテナスイッチ12のダイオードはOFFとなるため、アンテナスイッチ12で電力が消費されることはない。
【0034】
以上説明したように、本実施の形態によれば、複数のダイオードを同時にON/OFFして複数の無線通信方式を切り替える場合に、複数のダイオードをOFFにしたままで選択していない無線通信方式側の受信電界レベルモニターが行える場合には、複数のダイオードをONするために必要な電力を低減することができるという効果がある。
【0035】
なお、本実施の形態では、無線通信方式が2つの場合について説明したが、3つ以上の無線通信方式を電気的なスイッチで切り替える場合においても、同様な効果が期待できることは明らかである。図2は、無線通信方式が3つの場合を示すブロック図である。
【0036】
図2によると、アンテナ21と、アンテナスイッチ22、23と、方式A用無線機24、方式B用無線機25および方式C用無線機26と、切替制御信号27、28によりアンテナスイッチ22、23の切り替えを制御するCPU29とより構成されている。
【0037】
この実施例では、方式A用無線機24、方式B用無線機25および方式C用無線機26がカスケード接続されたアンテナスイッチ22、23により切り替えられることのほかの動作は、図1に示す動作と同様であるため、その説明を省略する。
【0038】
【発明の効果】
以上説明したように、本発明の携帯電話機によれば、複数の無線通信方式を複数のダイオードのON/OFF切り替えで選択する場合に、複数のダイオードがOFFにあって、選択されていない無線通信方式の受信電界レベルが十分高い場合には、アンテナとの未接続による減衰量を補正するのみでレベルモニターすることにより、ダイオードがONしない分だけ待ち受け時の消費電力を低減することが可能となる。
【0039】
これより、待ち受け時間の長時間化が期待できる。
【図面の簡単な説明】
【図1】本発明の携帯電話機の一つの実施の形態を示すブロック図である。
【図2】無線通信方式が3つの場合を示すブロック図である。
【符号の説明】
11 アンテナ
12 アンテナスイッチ
13 方式A用無線機
14 方式B用無線機
15 切替制御信号
16 CPU
21 アンテナ
22、23 アンテナスイッチ
24 方式A用無線機
25 方式B用無線機
26 方式C用無線機
27、28 切替制御信号
29 CPU
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile phone that can simultaneously stand by in a plurality of wireless communication systems, and more particularly to a mobile phone that can reduce power consumption during standby.
[0002]
[Prior art]
In a conventional mobile phone that supports multiple wireless communication methods, a common antenna is used for multiple wireless communication methods, and either method is selected by an antenna switch in order to reduce size and weight. (For example, refer to Patent Document 1).
[0003]
In addition, as this antenna switch, a switch using a plurality of diodes that are simple and small in structure and can be electrically turned on / off has been generally used (see, for example, Patent Document 2). .
[0004]
A mobile phone of a plurality of types that can simultaneously stand by in such a plurality of wireless communication methods is equipped with different wireless devices corresponding to the plurality of methods, and performs a standby operation by switching all the wireless communication methods. There is a problem that power consumption increases because it is necessary.
[0005]
[Patent Document 1]
JP 2002-291016 A [Patent Document 2]
Japanese Patent Laid-Open No. 2002-305462
[Problems to be solved by the invention]
The conventional mobile phone described above has a drawback in that power consumption increases because it is necessary to perform a standby operation by switching a plurality of wireless communication methods.
[0007]
The object of the present invention is to eliminate the above-mentioned conventional drawbacks, and in the state of the antenna switch in which the diode is OFF (non-energized) when the reception electric field monitoring level of the radio corresponding to each radio communication system is sufficiently high An object of the present invention is to provide a mobile phone capable of reducing power consumption during standby by monitoring the level of a received electric field or waiting while maintaining the above.
[0008]
[Means for Solving the Problems]
The mobile phone according to the present invention is a mobile phone that can simultaneously stand by in a plurality of wireless communication schemes, and includes an antenna shared by the plurality of wireless communication schemes and a plurality of radios corresponding to each of the plurality of wireless communication schemes. And a switching means for selecting one radio when not energized, and a CPU (central processing unit) for switching control of the switching means based on the received electric field monitor level of each wireless communication system , the switching means And a plurality of diodes, and when the control signal from the CPU is OFF, all the diodes are OFF when the power is not supplied, and one wireless communication method is selected .
[0010]
In addition, when the CPU is in a standby state in the wireless communication method selected by the control signal OFF, and the received electric field monitor level of another wireless communication method exceeds a predetermined level, the control signal OFF The reception electric field level is monitored by intermittent reception while maintaining this state.
[0011]
In addition, when the CPU is in a standby state with the wireless communication method selected by the control signal ON, the control signal is turned OFF and the switching unit is switched to select another wireless communication method. The reception electric field of the wireless communication system in the standby state is monitored, and when the monitored level exceeds a predetermined level, the switching unit continues standby while the other wireless communication system is selected by turning off the control signal. It is characterized in that.
[0012]
In addition, the mobile phone of the present invention is a mobile phone that can simultaneously stand by in a plurality of wireless communication methods, and is not selected when waiting in a selected wireless communication method. When the received electric field monitor level exceeds a predetermined level, the unselected state is maintained and the received electric field level is monitored or waited.
[0013]
Further, the mobile phone of the present invention is a mobile phone capable of simultaneously waiting in a plurality of wireless communication methods, a common antenna, a plurality of wireless devices corresponding to each of a plurality of wireless communication methods, A switching unit that switches connection between the antenna and each of the plurality of radio units, and a CPU (central processing unit) that controls the switching unit, and reception by intermittent reception by the radio unit that is not connected to the antenna Only when the electric field monitor level is less than a predetermined level, control for connecting the antenna and the radio is performed.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a mobile phone of the present invention.
[0015]
1 is a CPU (central processing unit) that controls switching of an antenna 11, an antenna switch 12, a method A radio 13, a method B radio 14, an antenna switch 12, and the like. 16.
[0016]
Next, the operation of the mobile phone according to the present embodiment will be described in detail with reference to FIG.
[0017]
According to FIG. 1, the antenna 11 can transmit and receive in two wireless communication systems, the wireless communication system A and the wireless communication system B, with one antenna, and is electrically connected to the antenna switch 12 on the printed circuit board. Yes.
[0018]
The antenna switch 12 is a high-frequency switch composed of a plurality of diodes disclosed in Japanese Patent Application Laid-Open No. 2002-305462, etc., and the plurality of diodes are all turned on or off by the switching control signal 15, and the wireless communication system A or wireless communication Select either method B.
[0019]
The system A radio 13 and the system B radio 14 transmit and receive messages to and from the base station via the antenna 11.
[0020]
The CPU 15 controls the overall functions of the mobile phone. Here, the CPU 15 controls the switching of the antenna switch 12 by the switching control signal 15.
[0021]
In the above configuration, the mobile phone of the present invention has two wireless devices corresponding to the two wireless communication methods, wireless communication method A when the diodes are all OFF, and wireless communication method B when the diodes are all ON. It is a specification to be selected, and the specification is such that the reception electric field level of the wireless communication method B can be monitored while waiting for the wireless communication method A, and the radio wave environment can be shifted to a better one. .
[0022]
In the state where all the diodes are OFF, it is assumed that the antenna 11 and the method A radio device 13 are connected without loss, and the antenna 11 and the method B radio device 14 have an isolation of, for example, 20 dB.
[0023]
Next, an operation when the mobile phone according to the present embodiment is waiting in the wireless communication system A will be described.
[0024]
The antenna switch 12 selects the wireless communication method A in a mode in which all the diodes are turned off by the switching control signal 15, and connects the antenna 11 and the wireless device 13 for the method A.
[0025]
When the reception electric field level of the wireless communication system B is intermittently monitored in this state, the wireless apparatus 14 for the system B includes an attenuation of 20 dB corresponding to isolation because the diode of the antenna switch 12 remains OFF. The received electric field level is monitored in the state.
[0026]
Here, when the received electric field level of the wireless communication system B is sufficiently large to be monitored, a true value can be obtained by correcting the measured received electric field level by 20 dB, so that the antenna switch 12 is not switched. The wireless device for method B can continue level monitoring. On the other hand, when the reception electric field level of the wireless communication system B is low or the wireless communication system B is not found, the antenna switch 12 may be switched to detect the wireless communication system B.
[0027]
Therefore, when the level of the wireless communication system B is monitored while the wireless communication system A is waiting, if the reception electric field level of the wireless communication system B is sufficiently high, the antenna switch 12 does not need to be switched, so the diode is turned on. Therefore, it is possible to reduce power consumption.
[0028]
Next, the operation when the wireless device of the present invention is waiting in the wireless communication system B will be described.
[0029]
The antenna switch 12 selects the wireless communication method B in a mode in which all the diodes are turned on by the switching control signal 15, and connects the antenna 11 and the method B radio device 14.
[0030]
In this case, the antenna switch 12 is switched to turn the diode OFF, and the reception electric field level of the wireless communication system B is monitored while the wireless communication system A is selected.
[0031]
When the reception field level of the wireless communication system B is sufficiently high and reception is possible, the antenna switch 12 is switched to the selection of the wireless communication system A, and when the reception field level is low, the antenna switch 12 is switched to the wireless communication system B. Continue waiting as it is selected.
[0032]
In this way, even when the wireless communication system B is waiting, if the reception electric field level of the wireless communication system B is sufficiently high, the wireless communication system A is selected by turning off the antenna switch 12 and waiting. It is possible to reduce the power consumption at the time as much as the diode is not turned on.
[0033]
Note that while the wireless communication system B is waiting, the reception electric field level monitor of the wireless communication system A is intermittently performed. In this case, since the diode of the antenna switch 12 is turned off, the antenna switch 12 consumes power. There is nothing.
[0034]
As described above, according to the present embodiment, when a plurality of diodes are simultaneously turned ON / OFF to switch a plurality of wireless communication methods, a wireless communication method in which a plurality of diodes are kept OFF and not selected. When the reception field level monitoring on the side can be performed, there is an effect that it is possible to reduce the electric power required to turn on the plurality of diodes.
[0035]
In the present embodiment, the case where there are two wireless communication systems has been described. However, it is obvious that the same effect can be expected when three or more wireless communication systems are switched by an electrical switch. FIG. 2 is a block diagram showing a case where there are three wireless communication systems.
[0036]
According to FIG. 2, the antenna switch 22, the antenna switch 22, 23, the method A radio 24, the method B radio 25, the method C radio 26, and the switching control signals 27, 28 are used to switch the antenna switches 22, 23. And a CPU 29 for controlling the switching.
[0037]
In this embodiment, the operation other than switching by the antenna switches 22 and 23 in which the system A radio 24, the system B radio 25, and the system C radio 26 are cascade-connected is shown in FIG. Since this is the same, the description thereof is omitted.
[0038]
【The invention's effect】
As described above, according to the mobile phone of the present invention, when a plurality of wireless communication systems are selected by switching ON / OFF of a plurality of diodes, a plurality of diodes are OFF and the wireless communication is not selected. When the reception electric field level of the system is sufficiently high, the power consumption during standby can be reduced by the amount that the diode is not turned on by only performing level monitoring by correcting the attenuation due to the unconnected antenna. .
[0039]
As a result, longer standby time can be expected.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an embodiment of a mobile phone of the present invention.
FIG. 2 is a block diagram showing a case where there are three wireless communication systems.
[Explanation of symbols]
11 Antenna 12 Antenna Switch 13 System A Radio 14 System B Radio 15 Switching Control Signal 16 CPU
21 Antenna 22, 23 Antenna switch 24 System A radio 25 System B radio 26 System C radio 27, 28 Switching control signal 29 CPU

Claims (5)

複数の無線通信方式で同時に待ち受けを行うことができる携帯電話機であって、複数の無線通信方式で共用するアンテナと、複数の無線通信方式の各々に対応する複数の無線機と、無通電時に1つの無線機を選択する切り替え手段と、各無線通信方式の受信電界モニターレベルに基づいて前記切り替え手段を切替制御するCPU(中央処理装置)とを備え、
前記切り替え手段は、複数のダイオードを有し、前記CPUからの制御信号OFFの時に、前記無通電時として、全てのダイオードがOFFとなり、1つの無線通信方式を選択することを特徴とする携帯電話機。
A mobile phone capable of simultaneously waiting in a plurality of wireless communication systems, an antenna shared by the plurality of wireless communication systems, a plurality of wireless devices corresponding to each of the plurality of wireless communication systems, and 1 when no power is supplied Switching means for selecting one radio, and a CPU (central processing unit) for switching control of the switching means based on the received electric field monitor level of each wireless communication system ,
The switching means has a plurality of diodes, and when the control signal from the CPU is OFF, all the diodes are OFF when the current is not supplied, and one mobile communication system is selected. .
前記CPUは、前記制御信号OFFで選択されている無線通信方式で待ち受け状態の時、他の無線通信方式の受信電界モニターレベルが所定のレベルを超えている場合には、前記制御信号OFFの状態を維持して間欠受信による受信電界レベルのモニターを行うことを特徴とする請求項1記載の携帯電話機。 The CPU is in the standby state in the wireless communication method selected by the control signal OFF, and when the received electric field monitor level of another wireless communication method exceeds a predetermined level, the control signal OFF state The mobile phone according to claim 1, wherein the reception electric field level is monitored by intermittent reception while maintaining the above. 前記CPUは、前記制御信号ONで選択されている無線通信方式で待ち受け状態の時、前記制御信号をOFFとして前記切り替え手段を切り替えて他の無線通信方式を選択している間に、前記待ち受け状態の無線通信方式の受信電界をモニターし、モニターしたレベルが所定のレベルを超えている時には、前記制御信号のOFFによって前記切り替え手段が前記他の無線通信方式を選択した状態で待ち受けを継続することを特徴とする請求項1記載の携帯電話機。 When the CPU is in a standby state in the wireless communication method selected by the control signal ON, the standby state is not changed while the control signal is turned off and the switching unit is switched to select another wireless communication method. The received electric field of the wireless communication system is monitored, and when the monitored level exceeds a predetermined level, the switching means continues waiting while the other wireless communication system is selected by turning off the control signal. The mobile phone according to claim 1 . 複数の無線通信方式で同時に待ち受けを行うことができる携帯電話機であって、選択された無線通信方式で待ち受けている際に、選択されていない他の無線通信方式の受信電界モニターレベルが所定のレベルを超えている場合には、選択されていない状態を維持して受信電界のレベルモニターまたは待ち受けを行うことを特徴とする携帯電話機。 A mobile phone that can simultaneously stand by in a plurality of wireless communication systems, and the reception field monitor level of another wireless communication system not selected is a predetermined level when waiting in the selected wireless communication system A mobile phone characterized in that if it exceeds the value, the level of the received electric field is monitored or waiting while maintaining the unselected state . 複数の無線通信方式で同時に待ち受けを行うことができる携帯電話機であって、共通のアンテナと、複数の無線通信方式の各々に対応する複数の無線機と、前記アンテナと前記複数の無線機のそれぞれとを接続切り替えする切り替え手段と、前記切り替え手段を制御するCPU(中央処理装置)とを有し、前記アンテナと接続されていない該無線機で間欠受信による受信電界モニターレベルが所定のレベルに満たない場合に限り前記アンテナと該無線機とを接続する制御を行うことを特徴とする携帯電話機。A mobile phone capable of simultaneously waiting in a plurality of wireless communication methods, a common antenna, a plurality of wireless devices corresponding to each of the plurality of wireless communication methods, and each of the antenna and the plurality of wireless devices And a CPU (Central Processing Unit) for controlling the switching means, and the radio field not connected to the antenna has a received electric field monitor level by intermittent reception that satisfies a predetermined level. A cellular phone characterized in that control for connecting the antenna and the radio is performed only when there is not .
JP2003183254A 2003-06-26 2003-06-26 Mobile phone Expired - Fee Related JP4239709B2 (en)

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