JP2004297121A - Portable terminal - Google Patents

Portable terminal

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Publication number
JP2004297121A
JP2004297121A JP2003082705A JP2003082705A JP2004297121A JP 2004297121 A JP2004297121 A JP 2004297121A JP 2003082705 A JP2003082705 A JP 2003082705A JP 2003082705 A JP2003082705 A JP 2003082705A JP 2004297121 A JP2004297121 A JP 2004297121A
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communication
wireless
portable
local
terminal
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JP2003082705A
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Japanese (ja)
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Mitsuhiro Kitachi
三浩 北地
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Kyocera Corp
京セラ株式会社
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Abstract

PROBLEM TO BE SOLVED: To provide a portable terminal which can improve communication efficiency and prolong the service lifetime of a battery in the portable terminal capable of being switched from local wireless communication to wide area wireless communication and vice versa.
SOLUTION: A communication system switching means for switching two communication systems is provided to the portable terminal utilizing both communication systems of the local wireless communication and the wide area wireless communication. The local wireless communication is operated at the time of power-on. And at the same time, when it is out of the range of the local wireless communication at the time of the power-on, the communication system is switched to the wide area wireless communication by the communication system switching means.
COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】 [0001]
【発明の属する技術分野】 BACKGROUND OF THE INVENTION
本発明は、局所無線通信と広域無線通信の双方の通信方式を搭載する携帯端末に関する。 The present invention relates to a portable terminal equipped with both communication systems of the local radio communication and wide-area wireless communications.
【0002】 [0002]
【従来の技術】 BACKGROUND OF THE INVENTION
近年、広域無線通信方式であって次世代の高速無線通信方式としてcdma2000 1x−EV DO方式(以下EV−DOと略称する)が開発されている。 Recently, cdma2000 1x-EV DO system a wide-area wireless communication scheme as a high speed wireless communication system of the next generation (hereinafter abbreviated as EV-DO) has been developed. このcdma2000 1x−EV DO方式は、Qualcomm社によるcdma2000 1xの拡張方式であるHDR(High Data Rate)方式を標準化した方式として、電波産業会ARIBにおいてStd. Std The cdma2000 1x-EV DO system, the HDR (High Data Rate) scheme is an extension mode of cdma2000 1x by Qualcomm, Inc. as standardized manner, in Association of Radio Industries and Businesses ARIB. T−64 1S−2000 C. T-64 1S-2000 C. S. S. 0024“cdma2000 High Rate Packet Data Air Interface Specification”で標準化されているものである。 In 0024 "cdma2000 High Rate Packet Data Air Interface Specification" are those standardized.
【0003】 [0003]
上記EV−DOと無線LAN(Local Area Network)の特徴を比較した場合に、静止している場合には無線LANの方がEV−DOよりもスループットが高いため、無線LAN圏内にいるならばEV−DOよりも無線LANで通信を行った方がデータレートの面で良い。 When comparing the characteristics of the EV-DO and a wireless LAN (Local Area Network), for better wireless LAN when at rest is higher throughput than EV-DO, if being in wireless LAN within EV who communicating with the wireless LAN may be a surface of a data rate than -DO. 一方、端末が移動中は無線LANの圏内に入ったとしてもすぐに圏外になってしまう可能性が非常に大きいため、この場合にはセル半径が大きいEV−DOの方が良い。 On the other hand, the terminal is moving because very large possibility that quickly become out of range even come within range of a wireless LAN, better cell radius is larger EV-DO in this case. EV−DOと無線LANの両方の通信方式を利用する携帯端末(以下、異なる2つの通信方式を利用する携帯端末をデュアル端末と称す)の場合、この両システムを同時に動作させることは制御の面でも消費電力の面でも都合が悪い。 The mobile terminal (hereinafter, different mobile terminal using the two communication systems referred to as dual terminal) using the communication scheme for both the EV-DO and a wireless LAN case, the surface of the control to operate the two systems simultaneously But inconvenient in terms of power consumption. またどちらも定期的に動かし、システムのサーチを行うということも効率がわるく、バッテリーの無駄である。 In addition both regularly move, the efficiency that carried out the search of the system is poor, is a waste of battery. また、ユーザがいちいち選択するような構成をとることは、ユーザにとってわずらわしく利便性を減少させてしまう。 Also, it is configured as a user each time selected, thus reducing the cumbersome convenience for the user.
【0004】 [0004]
従来の技術の1つとして、データ通信端末ではないが、Personal Handyphone SystemとPDC(Personal DigitalCellular)のデュアル端末であってこの2つの通信システムの選択をする技術がある。 As one of the prior art, is not a data communication terminal, a dual terminal Personal Handyphone System and PDC (Personal DigitalCellular) there is a technique for the selection of the two communication systems. この技術ではPDCとPersonal Handyphone Systemのどちらかの選択において、端末の移動速度が小さいとき、静止している時にはセル半径が小さいが高品質でデータ速度が速く、送信出力の小さいPersonal Handyphone Systemを使用し、移動速度が大きい時はセル半径が大きく、ハンドオーバなどに伴う通信の中断が起こりにくいPDCを使用するというものである。 In choose between PDC and Personal Handyphone System in this technique, when the moving speed of the terminal is small, fast data rate but the cell radius is small quality when at rest, using small Personal Handyphone System of transmission output and, when the moving speed is large, a large cell radius, is to use a hardly occurs PDC disruption of communication with such a handover.
また、他の技術としては、複数の通信システムを搭載した端末で、この端末が通信状態、料金、バッテリー残量などから、そのアプリケーションに一番有利な通信システムを選択するというものもある。 As another technique, a terminal equipped with a plurality of communication systems, the terminal communication state, rates, etc. remaining battery level, and some of selecting the most advantageous communication system to the application.
【0005】 [0005]
【特許文献1】 [Patent Document 1]
特開2002−369247号公報【0006】 Japanese Unexamined Patent Publication No. 2002-369247 Publication [0006]
【発明が解決しようとする課題】 [Problems that the Invention is to Solve
上記従来技術では、前者の場合、Personal Handyphone SystemもPDCも基本的にはカバーエリアが広く、無線LANのホットスポットのように点在するわけではない。 The above-described conventional art, in the former case, Personal Handyphone System also PDC is basically wide coverage area, not scattered as hot spots of wireless LAN. そのため無線LANの無い場合が多く、単純にハンドオフや移動速度だけで切り換えることはできないという問題がある。 Therefore, in many cases there is no wireless LAN, simply there is a problem that can not be switched in only handoff and movement speed. また、後者の場合、搭載している全てのシステムについてサーチを行う必要があり、効率が悪いという問題がある。 In addition, in the case of the latter, it is necessary to perform a search for all of the systems you have installed, efficiency is poor.
【0007】 [0007]
本発明は、上記の点に鑑みてなされたもので、局所無線通信と広域無線通信を切り換えることができる携帯端末において、通信の効率化、バッテリーの延命化をすることができる携帯端末を提供するものである。 The present invention has been made in view of the above, in the portable terminal capable of switching the local radio communication and wide-area wireless communication, to provide a mobile terminal capable of efficient communication, the battery life extension of it is intended.
【0008】 [0008]
【課題を解決するための手段】 In order to solve the problems]
請求項1に記載の携帯端末は、局所無線通信と広域無線通信の双方の通信方式を利用する携帯端末であって、前記2つの通信方式を切り換える通信方式切換手段を有し、電源投入時に、前記局所無線通信を作動させるとともに、該電源投入時に前記局所無線通信の圏外である場合には、前記通信方式切換手段により、通信方式を広域無線通信に切り換えることを特徴としている。 The mobile terminal according to claim 1 is a mobile terminal using both communication scheme of the local radio communication and wide-area wireless communication, a communication method switching means for switching the two communication systems, when the power is turned on, actuates the local radio communication, if it is out of range of the local wireless communication when the power source is turned on, by the communication method switching means is characterized by switching the communication method to the wide area wireless communication.
【0009】 [0009]
また、請求項2に記載の携帯端末は、請求項1に記載の携帯端末において、移動の停止を検出する移動停止検出手段を有し、移動の停止が検出されたときに、局所無線通信を作動させることを特徴としている。 The mobile terminal according to claim 2, in the mobile terminal according to claim 1, comprising a movement stop detection means for detecting a stop of the movement, when the stop of movement is detected, the local wireless communication It is characterized by actuating.
【0010】 [0010]
【発明の実施の形態】 DETAILED DESCRIPTION OF THE INVENTION
はじめに、本発明の概要を説明する。 First, an overview of the present invention.
無線LANとEV−DOの双方の通信機能を有し、自身の移動を検知できる携帯端末において、当該携帯端末が移動している時にはセルの大きいEV−DOによる通信機能を使用し、静止していて無線LANの圏内にいる場合には、この無線LANを使用するためのシステム選択手段に関する発明である。 Has both a communication function of the wireless LAN and EV-DO, the portable terminal can detect the movement of itself, when the mobile terminal is moving using the communication function by large EV-DO cell, it is still If you are in the area of ​​the wireless LAN systems is an invention relating to system selection means for using the wireless LAN.
例えば、電源投入時は無線LANを使用するように起動し、EV−DOは使用しない。 For example, when the power is turned on to start to use the wireless LAN, EV-DO is not used. この電源投入時に無線LANのサーチで無線LANの圏内であった場合はそのまま無線LANで通信を行う。 If was the area of ​​the wireless LAN in the search of a wireless LAN when the power is turned perform as communication wireless LAN. 無線LANでのサーチで圏外の場合、当該無線LANの動作を停止しEV−DOによる通信機能を立ち上げ、以後EV−DOによる動作を行う。 For out-of-service in the search for a wireless LAN, up a communication function by EV-DO stops the operation of the wireless LAN, and performs the operation by the subsequent EV-DO.
【0011】 [0011]
そして、EV−DOによる動作をしている時に、さらに当該携帯端末の移動を検知し、この携帯端末が無線LAN圏外であった場所から移動し、再び静止し、しばらく静止状態が続いた場合に無線LANのサーチを行う。 Then, when you are the operation of the EV-DO, further detects the movement of the mobile terminal moves from the location the mobile terminal is a wireless LAN service area, stationary again, if continued for a while stationary state It carried out a search of the wireless LAN. この時無線LANの圏内である場合には、無線LANに切り換える。 At this time if it is within the service area of ​​the wireless LAN is switched to wireless LAN. このようにして、通信時には無線LANかEV−DOのどちらか一つのシステムのみの動作しか行わない。 In this way, it does not perform only the operation of only either one of the system of wireless LAN or EV-DO at the time of communication.
【0012】 [0012]
このように制御するのは、前述のように、EV−DOと無線LANの特徴を比較した場合に、静止している場合には無線LANの方がEV−DOよりもスループットが高いため、無線LAN圏内にいるならばEV−DOよりも無線LANで通信を行った方がデータレートの面で良いためと、携帯端末が移動中は無線LANの圏内に入ったとしてもすぐに圏外になってしまう可能性が非常に大きいため、この場合にはセル半径が大きいEV−DOの方が良いからである。 To such control, as described above, when comparing the characteristics of the EV-DO and a wireless LAN, for better wireless LAN when at rest is higher throughput than EV-DO, a wireless and for good if're in LAN within the person who carried out the communication in the wireless LAN than the EV-DO in terms of data rate, in the mobile terminal is moving is also quickly become out of range as come within range of a wireless LAN because there is very likely to put away, because better cell radius is larger EV-DO in this case. このため静止していて無線LAN圏内ならば無線LANとして動作し、移動中及び無線LAN圏外ではEV−DOとして動作し、同時に動作を行わないように制御すると効率が良く、無駄な消費電力を抑えることができバッテリーの延命化をすることができる。 Therefore operate as a wireless LAN if the wireless LAN within be stationary, in a mobile and in a wireless LAN service area operating as EV-DO, more efficient be controlled so as not to operate simultaneously suppress the wasteful power consumption it can be to extend the life of the can be battery. また、EV−DOシステムへの無駄な輻射を抑えることができる。 In addition, it is possible to suppress unnecessary radiation to the EV-DO system.
【0013】 [0013]
以下、本発明の一実施の形態を、図を用いて説明する。 Hereinafter, an embodiment of the present invention will be described with reference to FIG.
なお、以下では広域無線通信の一実施例としてcdma2000 1x−EV DO方式による無線通信環境を利用するものとして説明する。 In the following it is described as wireless communication environment according to cdma2000 1x-EV DO system as an embodiment of a wide-area wireless communications.
また、下記の無線通信端末としては、携帯電話機やPDA(PersonalDigital Assistants:個人用情報機器)と称される携帯型の端末も含むものとする。 As the wireless communication terminal described below, a cellular phone or PDA: shall also include the (Personal Digital Assistants personal information device) called portable terminal. また、PDAの場合、通信手段を内蔵していてもよく、外部から通信手段を接続するものであってもよい。 Further, when the PDA, may have a built-in communication means, may be used to connect the communication means from the outside.
【0014】 [0014]
図1は、本実施の形態の携帯端末の概略構成図である。 Figure 1 is a schematic configuration diagram of a mobile terminal of the present embodiment.
携帯端末100は、無線LANにおける通信機能とEV−DOによる通信機能の双方を備えており、無線LANとEV−DOそれぞれの、アンテナ(101a,101b)、信号の変調/復調を行うRF部(102a,102b)、通信処理を行うベースバンド部(103a,103b)を持つ。 The mobile terminal 100 has both a communication function in the wireless LAN and EV-DO by the communication function, a wireless LAN and EV-DO, respectively, an antenna (101a, 101b), RF unit for modulating / demodulating the signal ( 102a, 102b), the baseband unit that performs a communication process with (103a, 103b). また、それらの制御などを行うCPU104と、移動検出装置105、メモリ106、表示部107、キー等の操作部108、PC等とのインターフェース部などからなる。 Further, the CPU104 to perform like their control, movement detection unit 105, a memory 106, and the like interface of a display unit 107, operation unit 108 such as keys, PC or the like. ここで、移動検出装置105は下記のように、例えば速度センサ等のデバイス、または、EV−DOによる受信時のフェージングピッチを監視し、移動を検出する検出装置などからなる。 Here, as the movement detecting device 105 described below, for example, speed sensor or the like of the device, or to monitor the fading pitch at the time of reception by the EV-DO, and the like detector for detecting movement. なお、携帯端末100における各部は、従来の携帯電話機等の携帯端末に使用される周知のデバイスを用いて構成することができる。 Each unit in the mobile terminal 100 can be configured using well-known devices used in a portable terminal such as a conventional mobile phone.
【0015】 [0015]
EV−DOによる動作時に、当該携帯端末100の移動を検知する手段としてはいくつかの方法が考えられる。 During operation of the EV-DO, a means for detecting the movement of the mobile terminal 100 may be considered several methods. GPS(衛星航法システム)を使用すれば定期的に位置測定を行うことによって移動や静止を簡単に知ることができる。 You can easily know the movement and still by performing periodic location measurement Using GPS (global positioning system). GPSを搭載していない端末でも、C/I(搬送波対干渉波比)やRSSI(受信信号強度)等の端末の電波状態を監視することによって端末が移動しているのか、静止しているのかを推定することができる。 Even a terminal that is not equipped with a GPS, whether the terminal is moving by monitoring the radio state of the terminal, such as C / I (carrier-to-interference ratio) and RSSI (Received Signal Strength), whether stationary it can be estimated. 例えばC/Iを例にすると、静止をしている時は多少の変動はあるものの、ある一定レベルを保ち続けるが、移動中にはC/Iが変動する。 For example, when the C / I as an example, although when you are still is some variation there, but continues keeping a certain level, C / I varies during movement. このC/Iを監視することによって端末が移動しているか否かの判断に用いることができる。 Terminal by monitoring the C / I can be used for the determination whether or not moving. または、加速度センサなどを使ってもよいし、周知のように受信におけるフェージング周波数を測定することによっても、移動を検出することができる。 Or may be using an acceleration sensor, by measuring the fading frequency at the receiving As is well known, it is possible to detect the movement. これらのような手段を用いて、携帯端末100の移動を検出することができる。 Using means such as these, it is possible to detect the movement of the mobile terminal 100.
【0016】 [0016]
次に、本実施の形態の携帯端末100の動作について、図2を参照して説明する。 Next, the operation of the mobile terminal 100 of this embodiment will be described with reference to FIG.
【0017】 [0017]
携帯端末100の電源投入時、CPU104は無線LANに係る通信機能部(101a,102a,103a)を立ち上げる(起動する)(S11;このとき、EV−DOに係る通信機能部(101b,102b,103b)は起動しない)。 At power-on of the mobile terminal 100, CPU 104 will start up the communication function unit according to the wireless LAN (101a, 102a, 103a) (start) (S11; this time, the communication function unit (101b according to the EV-DO, 102b, 103b) does not start). この場合、通常の無線LAN端末として動作を行い、無線LANの圏内にあるかどうかをサーチする(S12)。 In this case, it performs an operation as a normal wireless LAN terminal searches for whether the area of ​​the wireless LAN (S12). このサーチ時に無線LAN圏内であった場合は(S13の判断でYESの判定)、そのまま無線LAN端末として動作を行う(S14)。 If was wireless LAN is close to the search time (determination of YES is determined in S13), it performs as it operates as a wireless LAN terminal (S14).
【0018】 [0018]
一方、電源投入後の無線LANのサーチにて無線LAN圏外であった場合(S13の判断でNOの判定)、CPU104は無線LAN端末としての動作を停止する(S17;無線LANの電源OFF)。 On the other hand, if the Wireless LAN search after power has a wireless LAN service area (determination of NO is determined in S13), CPU 104 stops the operation of the wireless LAN terminal (S17; wireless LAN Power OFF). そして、EV−DO(図ではEVDOと略して記載)に係る通信機能部(101b,102b,103b)を起動し(S18)、EV−DOのみでの動作を行う(S19)。 Then, EVDO communication function unit according to (according abbreviated as EVDO in the figure) to start (101b, 102b, 103b) and (S18), performs the operation only in EVDO (S19). 他方、無線LAN圏内であり、無線LAN端末として動作していた場合にも(S14、S15)、しばらくして無線LAN圏外になった場合(S16の判断でNOと判定された場合)から、CPU104がメモリ106から取得した閾値1で定まる一定時間内に再び圏内に戻らない場合には、無線LANの圏外に移動したと判断し(S16の判断でNOと判定)、無線LANの動作を停止する(S17)。 On the other hand, a wireless LAN within, from even when operating as a wireless LAN terminal (S14, S15), (if it is judged NO in S16 determination) while, when it becomes a wireless LAN service area and, CPU 104 There if not return within again within a certain time determined by the threshold 1 acquired from the memory 106, determines that it has moved out of range of a wireless LAN (decision of nO in S16 determination), stops the operation of the wireless LAN (S17). そして、EV−DOに係る通信機能部(101b,102b,103b)を起動し(S18)、EV−DOのみでの動作を行う(S19)。 Then, start the communication function unit according to the EV-DO (101b, 102b, 103b) and (S18), it performs the operation only in EV-DO (S19).
この様な電源投入後の動作を行うことにより、常に両システムを監視する場合に比べて、EV−DO動作を行う回数を減じることができ、その分のバッテリーの消費を減らすことができる。 By performing the operation after such power on, always in comparison with the case of monitoring both systems, it is possible to reduce the number of times of the EV-DO operation, it is possible to reduce the consumption of that amount of the battery.
【0019】 [0019]
また無線LAN圏外であってEV−DOによる動作をしていた場合、CPU104は移動検出装置105によって当該携帯端末100が移動しているかどうかを監視する(S20)。 Also a wireless LAN service area if you were an operation by the EV-DO, CPU 104 monitors whether the mobile terminal 100 is moved by the movement detector 105 (S20). 携帯端末100が同じ場所で静止を続け、無線LAN圏外であった場所から移動していないようならば(S21の判断でNOの判定の場合)、無線LANのサーチを行うことなく、EV−DOでの動作を続ける(S19)。 Continue the mobile terminal 100 is still in the same place, if it does not seem to be moved from the location were the wireless LAN service area (when the judgment of NO in S21 determination), without performing a search of a wireless LAN, EV-DO continue to operate in the (S19). 一方、EV−DO通信に係る待ち受け中にメモリ106から取得した閾値2で定まる所定時間以上の累積の移動を検出し(S21の判断でYESの判定される場合)、その後再び静止を検出した時に、さらにメモリ106から取得した閾値3で定まる所定時間以上静止を続けた時に(S22の判断でYESの判定)、EV−DOによる通信中で無かった場合、CPU104は無線LANに係る通信機能部(101a,102a,103a)を立ち上げ(S11)、無線LANでのサーチを行う。 On the other hand, (when determined YES in S21 determination) to detect movement of a predetermined time or more cumulative determined by threshold 2 obtained from the memory 106 during standby of the EV-DO communication, when subsequently detected the stationary again further when continued still for a predetermined time or more determined by the threshold 3 acquired from the memory 106 (YES judgment in S22 determination), if not a communicating by EV-DO, CPU 104 is a communication function unit according to the wireless LAN ( 101a, 102a, 103a) launched (S11), it performs a search for a wireless LAN. 他方、EV−DOによる通信中であった場合には通信が終了した時点で無線LANのサーチを行う。 On the other hand, performs a search for wireless LAN at the time the communication is terminated in the case was in communication by EV-DO. その後は電源投入後に無線LANのサーチを行った時の動作(S13以降の動作)と同様に、無線LAN圏内ならば無線LANのみで、圏外ならばEV−DOのみで動作を行う。 Thereafter, in the same manner as in the operation (S13 subsequent operation) when performing a search of the wireless LAN after the power is turned on, the only wireless LAN If a wireless LAN within, perform the operation only in the EV-DO if out-of-service. 以後これを繰り返す。 Thereafter repeating this. なお、上記閾値1,2,3は、メモリ106に予め設定されている。 Note that the threshold 1, 2 and 3, is previously set in the memory 106.
【0020】 [0020]
以上のような構成をとることによって、ユーザはどちらの通信システムを選択するのかという事を意識することなく、効率の良い通信システムの選択をすることができる。 By taking the above configuration, the user is without being aware of the fact that whether to choose the communication system, it is possible to select an efficient communication system.
また、無線LAN、EV−DOの両通信システムで同時に起動・動作し、両方で待ち受ける場合に比べて、消費電力が小さくなる。 Further, a wireless LAN, and launch-operate simultaneously in both the communication system of EV-DO, as compared with the case to listen in both power consumption is reduced. また、電源投入後に無線LAN圏内であった場合に、その中で通信が完結し、電源がきられる場合(データ通信専用端末である場合には、携帯電話と異なり、必要な時のみ電源を入れることが十分に考えられる)に、EV−DOに係る動作を行わないために、EV−DO基地局側からみると、接続する端末の数が増えないため、そのセル内の無線リソースの有効利用につながる。 Also, if it was a wireless LAN within after power on, complete communication among them, when the case (data communication dedicated terminal the power is Kira, unlike cellular telephones, putting only power when needed in is considered sufficiently), in order not to perform an operation according to the EV-dO, when viewed from the EV-dO base station side, the number of connections to the terminal does not increase, the effective use of radio resources in the cell lead. またユーザが、どちらのシステムを使用するかということを意識することなく携帯端末100を使用することができる。 In addition the user can, to use the mobile terminal 100 without being conscious of the fact that whether to use the system.
【0021】 [0021]
【発明の効果】 【Effect of the invention】
以上、詳細に説明したように、本発明によれば、局所無線通信と広域無線通信を切り換えることができる携帯端末において、通信の効率化、バッテリーの延命化をすることができる。 As described above in detail, according to the present invention, the portable terminal capable of switching the local radio communication and wide-area wireless communication, it is possible to streamline communications, battery life extension of that.
【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS
【図1】本発明の一実施の形態である携帯端末の概略構成を示すブロック図である。 1 is a block diagram showing the schematic configuration of a mobile terminal according to an embodiment of the present invention.
【図2】同実施の形態の携帯端末の動作フローチャートの一例である。 Figure 2 is an example of an operation flow of the portable terminal of the same embodiment.
【符号の説明】 DESCRIPTION OF SYMBOLS
100…携帯端末101a…無線LANアンテナ102a…無線LAN・RF部103a…無線LANベースバンド部101b…EV−DOアンテナ102b…EV−DO・RF部103b…EV−DOベースバンド部104…CPU 100 ... mobile terminal 101a ... wireless LAN antenna 102a ... wireless LAN · RF unit 103a ... wireless LAN baseband section 101b ... EV-DO antenna 102b ... EV-DO · RF section 103b ... EV-DO base band unit 104 ... CPU
105…移動検出装置106…メモリ107…表示部108…操作部 105 ... movement detecting device 106 ... memory 107 ... display unit 108 ... operation unit

Claims (2)

  1. 局所無線通信と広域無線通信の双方の通信方式を利用する携帯端末であって、 A mobile terminal using both communication scheme of the local radio communication and wide-area wireless communication,
    前記2つの通信方式を切り換える通信方式切換手段を有し、電源投入時に、前記局所無線通信を作動させるとともに、該電源投入時に前記局所無線通信の圏外である場合には、前記通信方式切換手段により、通信方式を広域無線通信に切り換えることを特徴とする携帯端末。 A communication method switching means for switching the two communication systems, when the power is turned on, along with operating the local wireless communication, if it is out of range of the local wireless communication when the power source is turned on, by the communication method switching means , mobile terminal, characterized in that switching the communication mode to the wide-area wireless communications.
  2. 移動の停止を検出する移動停止検出手段を有し、移動の停止が検出されたときに、局所無線通信を作動させることを特徴とする請求項1に記載の携帯端末。 It has a movement stop detection means for detecting a stop of the movement, when the stop of movement is detected, the portable terminal according to claim 1, characterized in that actuating the local radio communication.
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