JP2000102060A - Method and system for exchanging position information in mobile terminal - Google Patents
Method and system for exchanging position information in mobile terminalInfo
- Publication number
- JP2000102060A JP2000102060A JP28737998A JP28737998A JP2000102060A JP 2000102060 A JP2000102060 A JP 2000102060A JP 28737998 A JP28737998 A JP 28737998A JP 28737998 A JP28737998 A JP 28737998A JP 2000102060 A JP2000102060 A JP 2000102060A
- Authority
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- Japan
- Prior art keywords
- position information
- mobile terminal
- information
- accuracy
- communication
- 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.)
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、位置検出機構を持
たない、あるいは利用できない移動端末に対しても、別
の端末から位置情報を送信し利用可能とする方法および
装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for transmitting position information from another terminal to a mobile terminal that does not have a position detection mechanism or cannot use the terminal.
【０００２】[0002]
【従来の技術】位置情報を利用してサービスを提供する
移動端末は、ＧＰＳやＰＨＳ等の位置情報を検出する手
段を具備していることが必須条件である。またこれらの
位置検出装置は、装置構成上、小型化することが障害と
なり、本格的な個人ナビゲーションサービスにまで発展
していない。現状、車載端末への搭載によるカーナビゲ
ーションサービスが普及している段階である。2. Description of the Related Art It is an essential condition that a mobile terminal that provides a service using location information has a means for detecting location information such as GPS and PHS. In addition, in these position detecting devices, downsizing is an obstacle in the device configuration, and has not developed into a full-scale personal navigation service. At present, it is at the stage where car navigation services by mounting on in-vehicle terminals are spreading.
【０００３】[0003]
【発明が解決しようとする課題】移動端末における位置
検出手段は、検出場所や検出精度に応じて、各種の検出
手法の組み合わせが必要となる。従って、様々な状況で
位置検出を行うことを可能とする移動端末は、複数種類
の位置検出装置を含む必要がある。これが移動端末を複
雑にし、携帯性を損ね、コストも高くする要因となって
いる。しかも位置利用サービスの普及の阻害要因となり
つつある。The position detecting means in the mobile terminal requires a combination of various detection methods according to the detection location and the detection accuracy. Therefore, a mobile terminal capable of performing position detection in various situations needs to include a plurality of types of position detection devices. This complicates the mobile terminal, impairs portability, and increases costs. Moreover, it is becoming a hindrance to the spread of location-based services.
【０００４】本発明の目的は、位置検出機能をもたない
移動端末でも位置情報を入手することのできる方法およ
び装置を提供することにある。[0004] It is an object of the present invention to provide a method and an apparatus which enable a mobile terminal without a position detecting function to obtain position information.
【０００５】[0005]
【課題を解決するための手段】本発明においては、位置
検出手段を持たない端末であっても、近傍に位置検出可
能な端末が存在した場合、そことの間で近傍通信を行
い、位置情報を授受する機能を実現することにより、位
置検出手段を持つ端末と同様なサービスを実現する。According to the present invention, even if a terminal does not have a position detecting means, if a terminal capable of detecting a position is present in the vicinity, near terminal communication is performed with the terminal and position information is obtained. By realizing the function of transmitting and receiving the information, the same service as the terminal having the position detecting means is realized.
【０００６】この通信により得られた位置情報には、元
々の位置情報の精度以外に、通信距離による精度劣化が
生じるが、これを精度情報に加算していくことにより、
位置情報の精度を正しく認識できる。In the position information obtained by this communication, accuracy degradation due to the communication distance occurs in addition to the accuracy of the original position information. By adding this to the accuracy information,
Accurate recognition of location information.
【０００７】さらに通信により精度が劣化するので、多
段に中継された情報を排除する。また一定時間経過した
情報は再利用しない機構により、不正確な情報の流通に
も歯止めがかかる。Further, since the accuracy is deteriorated by communication, information relayed in multiple stages is eliminated. In addition, a mechanism that does not reuse information after a certain period of time prevents the distribution of incorrect information.
【０００８】[0008]
【発明の実施の形態】図１にシステム全体の構成を示
す。１は、位置検出機能付きの移動端末である。２は位
置検出機能なしの移動端末である。１の移動端末は、Ｇ
ＰＳ衛星４、微弱無線５、赤外線６といった手法により
位置検出を行い、位置情報を確保している。これに対
し、２の移動端末は、位置情報を検出する手段がないも
のとする。FIG. 1 shows the configuration of the entire system. 1 is a mobile terminal with a position detection function. Reference numeral 2 denotes a mobile terminal without a position detecting function. 1 mobile terminal is G
The position is detected by a method such as the PS satellite 4, the weak radio 5 and the infrared ray 6, and the position information is secured. On the other hand, it is assumed that the second mobile terminal has no means for detecting position information.
【０００９】ここで２の移動端末から、１の移動端末に
対して位置情報の問合せの通信を行う。結果として２の
移動端末は位置情報を入手し、利用者に対して１と同様
なサービスを利用者へ提供するものである。[0009] Here, two mobile terminals communicate with one mobile terminal to inquire about location information. As a result, the mobile terminal 2 obtains the location information and provides the same service to the user to the user.
【００１０】図２は移動端末のハードウェア構成を示
す。１の移動端末（位置検出機能付き）は、各種の位置
検出装置７、および位置データの変換のための形式変換
装置８を持つ。これらから得た位置情報は、制御装置９
で処理を受け、記憶装置１０に格納され、各種のアプリ
ケーションサービスに活用され、入出力装置１１を介し
て表示等を行う。また位置情報の送受信のため、通信装
置１２をもつ。FIG. 2 shows a hardware configuration of the mobile terminal. One mobile terminal (with a position detection function) has various position detection devices 7 and a format conversion device 8 for converting position data. The position information obtained from these is transmitted to the control device 9
, Is stored in the storage device 10, is utilized for various application services, and performs display and the like via the input / output device 11. It also has a communication device 12 for transmitting and receiving position information.
【００１１】２の移動端末（位置検出機能なし）は、１
の移動端末（位置検出機能付き）に含まれている位置検
出関連装置はなく、通信装置１２と制御装置９、記憶装
置１０、および入出力装置１１から構成される。すなわ
ち、１の移動端末に比べてシンプルな構成となる。The two mobile terminals (without the position detection function) are:
There is no position detection-related device included in the mobile terminal (with a position detection function), and the mobile terminal includes a communication device 12, a control device 9, a storage device 10, and an input / output device 11. That is, the configuration is simpler than one mobile terminal.
【００１２】図３は、移動端末の動作をブロック図で説
明するものである。なお、位置情報の送受信機能は、１
の移動端末（位置検出機能付き）、および２の移動端末
（位置検出機能なし）の両方に共通するものとする。実
際、１の移動端末であっても、自分の持つ位置情報より
高精度の位置情報が利用できる場合があるため、情報要
求側としても動作するものとする。FIG. 3 is a block diagram for explaining the operation of the mobile terminal. The location information transmission / reception function is 1
And the two mobile terminals (without the position detection function). In fact, even a single mobile terminal may be able to use location information with higher accuracy than its own location information.
【００１３】まず、移動端末から位置情報を要求する信
号をブロードキャスト送信１３する。この実現方法につ
いては、特定の端末を指定しないで近傍の端末すべてに
送信するタイプであっても、特定の相手（事前に登録さ
れた相手）に限定するタイプでもよい。First, a signal for requesting position information is broadcast-transmitted 13 from the mobile terminal. This realization method may be a type of transmitting to all nearby terminals without specifying a specific terminal, or a type of limiting to a specific partner (a partner registered in advance).
【００１４】近傍通信の手段については、微弱無線通信
や赤外線通信等を想定しているが、本発明ではこの通信
手段については限定しない。[0014] The means of the near field communication is assumed to be weak wireless communication or infrared communication, but the present invention is not limited to this communication means.
【００１５】次に、これに応答した近傍の端末から、位
置情報を受信１４する。この応答は一般に近傍に複数台
の応答可能な端末があった場合、複数の応答が得られ
る。得られた位置情報に、通信による距離に応じて、位
置精度を加算する処理１５を行う。つまり当初の位置精
度が半径Ｒメートルとし、近傍通信の最大通信距離がｒ
メートルとすると、位置精度はＲ＋ｒメートルとなる。
この処理も受信した位置情報の数だけ行う。Next, position information is received 14 from a nearby terminal responding to the request. Generally, when there are a plurality of responsive terminals in the vicinity, a plurality of responses can be obtained. A process 15 for adding position accuracy to the obtained position information according to the distance by communication is performed. That is, the initial position accuracy is assumed to be radius R meters, and the maximum communication distance of the proximity communication is r.
If it is meters, the position accuracy is R + r meters.
This process is also performed for the number of received position information.
【００１６】次にこれらの複数の位置情報から選択を行
う。まず精度の最も高いものを選択１６する。あるいは
複数の位置情報を検証して、より精度の高い情報に加工
生成１７する処理を行う。この様にして得られた情報を
利用１８する。Next, selection is made from the plurality of pieces of position information. First, the one with the highest accuracy is selected 16. Alternatively, a process of verifying a plurality of pieces of position information and processing and generating 17 into more accurate information is performed. The information obtained in this way is used 18.
【００１７】なお、情報を得てからあらかじめ規定した
一定時間内であれば、これを他の端末に配信する処理に
入る。つまり他の端末からの情報要求１９を受信した場
合、位置情報の送信２０を行う。これを一定時間内に限
定するのは、受信後の端末の移動に伴う影響を排除する
ためと、古いデータの流通を阻止するためである。If the information is obtained within a predetermined period of time after the information is obtained, the process of distributing the information to another terminal is started. That is, when an information request 19 from another terminal is received, transmission 20 of position information is performed. The reason for limiting this to a certain time is to eliminate the influence of the movement of the terminal after reception and to prevent the distribution of old data.
【００１８】図４には、近傍通信による位置検出精度の
拡大の様子を説明する概念図である。これは、図３の１
５の処理に対応する。図の円の中心は、位置情報により
示される座標位置とする。この位置が検出された際の精
度が半径Ｒとすると、端末の真の位置は、指定された座
標を中心として半径Ｒの円内２１に位置すると考えられ
る。この情報を他の端末に伝えた場合、この伝える手段
による誤差拡大については、近傍通信の最大交信距離で
あるｒを加算したもの（＝Ｒ＋ｒ）が新たな精度とな
る。すなわち図４の破線の円内２２に位置すると考えら
れる。FIG. 4 is a conceptual diagram illustrating how the position detection accuracy is increased by proximity communication. This is shown in FIG.
5 corresponds to the processing of FIG. The center of the circle in the figure is the coordinate position indicated by the position information. Assuming that the accuracy when this position is detected is a radius R, it is considered that the true position of the terminal is located within a circle 21 of the radius R with the designated coordinates as the center. When this information is transmitted to another terminal, a new accuracy (= R + r) obtained by adding r, which is the maximum communication distance of the proximity communication, is used as the error enlargement by this transmitting means. In other words, it is considered that it is located within the dashed circle 22 in FIG.
【００１９】図５は、移動端末間の交信方法を説明する
ものである。これは図３の１６の処理に対応する。まず
Ａの端末は位置検出機能を持つものとする。この近傍に
いた端末Ｂは、端末Ａから位置情報を受信し、位置精度
＝Ｒ＋ｒと認識する。さらに端末Ｃは、距離的に端末Ａ
からの情報を直接受信できない場合、端末Ｂからの情報
を受信し、位置精度＝Ｒ＋２ｒと認識する。（ただし近
傍通信の距離ｒは共通であると仮定した。）さらに、端
末Ｄは後からこの位置に加わり、端末Ａ、Ｂ、Ｃといず
れとも交信可能とする。この場合、３つの端末（Ａ、
Ｂ、Ｃ）から位置情報を受信するが、最も位置検出精度
が高い端末Ａからの情報を採用する。そして位置精度＝
Ｒ＋ｒと認識する。FIG. 5 explains a communication method between mobile terminals. This corresponds to the process 16 in FIG. First, it is assumed that the terminal A has a position detecting function. The terminal B in the vicinity receives the position information from the terminal A, and recognizes that the position accuracy is R + r. Further, the terminal C is the terminal A
When the information from the terminal B cannot be directly received, the information from the terminal B is received, and it is recognized that the positional accuracy is R + 2r. (However, it is assumed that the distance r of the near-field communication is common.) Further, the terminal D joins this position later and can communicate with the terminals A, B, and C. In this case, three terminals (A,
B, C), position information is received, but information from terminal A, which has the highest position detection accuracy, is adopted. And position accuracy =
Recognize as R + r.
【００２０】図６は、移動端末間の交信の流れ（情報の
受信要求の場合）を示す。これは図３の１３と１４の処
理に対応する。端末の対応関係は図５に示す通りとす
る。FIG. 6 shows the flow of communication between mobile terminals (in the case of an information reception request). This corresponds to the processes 13 and 14 in FIG. The correspondence between the terminals is as shown in FIG.
【００２１】端末Ｄは周期的に近傍の端末への情報要求
をブロードキャスト送信する。これに応答する端末Ａ、
Ｂ、Ｃは、それぞれ保持する位置情報を送信する。この
複数の応答により位置情報を獲得する。The terminal D periodically broadcasts an information request to a nearby terminal. Terminal A responding to this,
B and C each transmit the held position information. The position information is obtained by the plurality of responses.
【００２２】図７は、移動端末間の交信の流れ（情報の
送信の場合）を示す。これは図３の１９と２０の処理に
対応する。端末の対応関係は図５に示す通りとする。FIG. 7 shows the flow of communication between mobile terminals (in the case of transmitting information). This corresponds to the processing of 19 and 20 in FIG. The correspondence between the terminals is as shown in FIG.
【００２３】端末Ｄが受信した要求に対して、有効な位
置情報を保持している場合これを返却する。If the terminal D holds valid position information in response to the received request, it returns this information.
【００２４】図８は、位置情報の交換による複数の位置
情報を利用し、位置精度が向上する場合の例を説明す
る。これは図３の１７の処理に対応する。１つの位置情
報がＡ２３であり、別の位置情報がＢ２４であったとす
る。２つの円の重複部分（図の網掛け部分２５）がより
高い精度を与えるため、これを採用する。FIG. 8 illustrates an example in which a plurality of position information obtained by exchanging position information is used to improve the position accuracy. This corresponds to the process 17 in FIG. It is assumed that one position information is A23 and another position information is B24. This is employed because the overlap of the two circles (shaded portion 25 in the figure) gives higher accuracy.
【００２５】図９は、位置情報の交換による複数の位置
情報を利用し、位置精度が向上する場合の別の例を説明
する。これも図３の１７の処理に対応する。FIG. 9 illustrates another example in which a plurality of pieces of position information obtained by exchanging position information are used to improve the position accuracy. This also corresponds to the process 17 in FIG.
【００２６】先ほどと同様に、１つの位置情報がＡ２３
であり、別の位置情報がＢ２４であったとする。２つの
円の重複部分（図の網掛け部分２５）がより高い精度を
与えるため、これを採用する。ただしこの場合、位置情
報が中心座標と半径（精度）で示される形式に統一する
ため、網掛け部分の外接円２６を求める。すなわち、円
の中心は、ＡｃからＢｃの方向へＸ、半径Ｙの円を求
め、新しい位置情報とする。ただしここでAs before, one piece of position information is A23
And another location information is B24. This is employed because the overlap of the two circles (shaded portion 25 in the figure) gives higher accuracy. However, in this case, the circumscribed circle 26 of the shaded portion is determined in order to unify the position information into a format indicated by the center coordinates and the radius (accuracy). That is, the center of the circle is determined to be new position information by obtaining a circle having an X and a radius Y in the direction from Ac to Bc. But here
【００２７】[0027]
【数１】 (Equation 1)
【００２８】である。この位置情報は最初の位置情報よ
りも精度的に向上したものとなっている。Is as follows. This position information is more precisely improved than the first position information.
【００２９】図１０は、移動端末間の近傍交信の応用例
を示す。（１）は、カーナビ搭載の移動端末を利用し
て、近傍の位置検出機能のない移動端末に情報を提供す
る場合である。現状のカーナビの普及台数を考慮すれば
有効な情報源として活用できると想定される。（２）
は、集団行動するグループにおいて、引率者端末にのみ
位置検出機能をもつ場合である。近傍で行動するため、
位置情報を効率良く利用できると想定される。FIG. 10 shows an application example of proximity communication between mobile terminals. (1) is a case where information is provided to a mobile terminal having no nearby position detection function using a mobile terminal equipped with a car navigation system. It is expected that it can be used as an effective information source considering the current number of car navigation systems. (2)
Is a case where only the leader terminal has a position detection function in a group that acts collectively. To act nearby,
It is assumed that location information can be used efficiently.
【００３０】図１１は、双方向通信可能な近傍通信方式
の例である。本発明においては、これらの通信手段は限
定するものではない。なお例示した交信距離が図４のｒ
に相当する。ただし交信距離は各種の条件により異なる
ため、あくまで参考値である。FIG. 11 shows an example of a proximity communication system capable of two-way communication. In the present invention, these communication means are not limited. The illustrated communication distance is r in FIG.
Is equivalent to However, since the communication distance varies depending on various conditions, it is a reference value only.
【００３１】移動端末においては、このようなテーブル
を記憶装置内に保持し、通信手段に応じたｒの値（時々
刻々と変化しても良い）を利用することとなる。In the mobile terminal, such a table is held in the storage device, and the value of r (which may change every moment) according to the communication means is used.
【００３２】図１２は、位置情報の形式を示す例であ
る。位置情報（緯度、経度、高度）に加えて、属性情報
として「精度」２９が含まれていることが必須である。FIG. 12 shows an example of the format of the position information. It is essential that “accuracy” 29 is included as attribute information in addition to the position information (latitude, longitude, altitude).
【００３３】[0033]
【発明の効果】本発明により、位置検出機能を持たない
移動端末においても、近傍通信の機能を持つことによ
り、位置情報を送受信し、必要なアプリケーションサー
ビスの提供が可能となる。しかも近傍通信機能は、位置
検出装置よりも複雑さコスト等において有利であるた
め、端末機の小型軽量化、コスト低下、サービス性の向
上等の効果が期待できる。According to the present invention, even a mobile terminal having no location detection function can transmit and receive location information and provide necessary application services by having a proximity communication function. In addition, the proximity communication function is more advantageous than the position detection device in terms of complexity, cost, and the like. Therefore, effects such as reduction in size and weight of the terminal, cost reduction, and improvement in serviceability can be expected.
【図１】本発明のシステム全体を説明する図である。FIG. 1 is a diagram illustrating the entire system of the present invention.
【図２】本発明に使用する移動端末のハードウェア構成
を示すものである。FIG. 2 shows a hardware configuration of a mobile terminal used in the present invention.
【図３】本発明における、移動端末の動作を説明するも
のである。FIG. 3 illustrates an operation of a mobile terminal according to the present invention.
【図４】近傍通信による位置検出精度が拡大する概念を
説明するものである。FIG. 4 is a view for explaining a concept of increasing position detection accuracy by proximity communication.
【図５】移動端末間の交信方法を説明するものである。FIG. 5 illustrates a communication method between mobile terminals.
【図６】移動端末間の交信フロー（位置情報の受信要
求）を示すものである。FIG. 6 shows a communication flow (reception request for position information) between mobile terminals.
【図７】移動端末間の交信フロー（位置情報の送信）を
示すものである。FIG. 7 shows a communication flow (transmission of position information) between mobile terminals.
【図８】位置精度の向上が可能となる場合の説明図であ
る。FIG. 8 is an explanatory diagram of a case where the position accuracy can be improved.
【図９】位置精度の向上が可能となる別の場合の説明図
である。FIG. 9 is an explanatory diagram of another case where the position accuracy can be improved.
【図１０】本発明の移動端末での応用事例を説明するも
のである。FIG. 10 illustrates an application example of a mobile terminal according to the present invention.
【図１１】双方向近傍通信の例を示す参考図である。FIG. 11 is a reference diagram illustrating an example of two-way proximity communication.
【図１２】位置情報に付随する精度情報を含めた位置情
報の形式の例を示す図である。FIG. 12 is a diagram illustrating an example of a format of position information including accuracy information accompanying the position information.
１ 移動端末（位置検出機能付き） ２ 移動端末（位置検出機能なし） ３ 利用者 ４ ＧＰＳ衛星 ５ 微弱無線発信機 ６ 赤外線ＩＤ送信機 ７ 位置検出装置 ８ 形式変換装置 ９ 制御装置 １０ 記憶装置 １１ 入出力装置 １２ 通信装置 １３ 情報要求信号をブロードキャスト送信 １４ 応答（位置情報）を受信 １５ 通信手段に対応する精度劣化量（ｒ）を加算 １６ 精度の高いものを選択 １７ 複数の情報から、より精度の高い情報を生成 １８ 位置情報の抽出、利用 １９ 情報要求信号の受信 ２０ 位置情報の送信 ２１ 移動端末（位置検出機能付き）により選られた位
置と精度 ２２ 近傍通信により選られた位置と精度（オリジナル
位置情報に対して、近傍通信による位置精度の拡大を加
算する） ２３ 位置検出範囲 Ａ ２４ 位置検出範囲 Ｂ ２５ 位置検出の重複範囲（網掛け部分） ２６ 合成された位置範囲（円形） Ｃ ２７ ＧＰＳ搭載移動端末（カーナビ等） ２８ 属性情報・精度Reference Signs List 1 mobile terminal (with position detection function) 2 mobile terminal (without position detection function) 3 user 4 GPS satellite 5 weak radio transmitter 6 infrared ID transmitter 7 position detection device 8 format conversion device 9 control device 10 storage device 11 input Output device 12 Communication device 13 Broadcast transmission of information request signal 14 Receiving response (position information) 15 Addition of accuracy deterioration amount (r) corresponding to communication means 16 Select high-precision one 17 More accurate from multiple information Generate high information 18 Extract and use location information 19 Receive information request signal 20 Send location information 21 Location and accuracy selected by mobile terminal (with location detection function) 22 Location and accuracy selected by proximity communication (original (Addition of enlargement of position accuracy by proximity communication is added to position information.) 23 Position detection range A 24 Position detection range B 25 Overlapping range of 置検 out (hatched portion) 26 synthesized position range (circular) C 27 GPS equipped mobile terminal (car navigation systems) 28 attribute information and accuracy
Claims (6)
末装置が、その近傍に存在し位置情報を持つ端末装置と
の間で近傍通信を行うことにより位置情報を入手するこ
とを特徴とする、移動端末における位置情報の交換方
法。1. A mobile terminal device not having a function of detecting position information, wherein the mobile terminal device obtains position information by performing near-field communication with a terminal device which is present in the vicinity and has position information. A method for exchanging location information in a mobile terminal.
情報の検出機能を具備しない別の移動端末に、入手した
位置情報を配信する、請求項１記載の位置情報の交換方
法。2. The location information exchange method according to claim 1, wherein the mobile terminal device further distributes the acquired location information to another mobile terminal that does not have a function of detecting nearby location information.
情報を持つ複数の端末装置からの複数の位置情報に対
し、各位置情報がもつ位置精度に近傍通信により発生す
る誤差を加算した位置精度を求め、最も高い位置精度を
もつ位置情報を選択する、請求項１または２のいずれか
に記載の位置情報の交換方法。3. The mobile terminal device according to claim 1, wherein a plurality of position information from a plurality of terminal devices which are present in the vicinity and have position information are added with a position accuracy of each position information and an error generated by a nearby communication. 3. The method for exchanging position information according to claim 1, wherein accuracy is determined, and position information having the highest position accuracy is selected.
信を可能とするブロードキャスト通信をふくむ、請求項
１−３のいずれかひとつに記載の位置情報の交換方法。4. The location information exchange method according to claim 1, wherein said near field communication includes broadcast communication that enables near field communication with any other party.
数の位置情報を組み合わせることにより、もとの位置情
報より高い精度の位置情報を得る、請求項１−４のいず
れかひとつに記載の位置情報の交換方法。5. The mobile terminal device according to claim 1, wherein the mobile terminal device having obtained the position information obtains position information with higher accuracy than the original position information by combining a plurality of position information. How to exchange location information.
手段と、 応答した端末からの位置情報を近傍通信手段により受信
する手段と、 複数個受信した位置情報から適切なものを選択する手段
と、 入手した情報の精度を適切に設定あるいは精度を向上す
る手段と、 他の端末からの情報要求に応じて位置情報を送信する手
段と、 得られた位置情報をアプリケーションプログラムを通し
て利用者にサービスを提供する手段を有することを特徴
とする移動端末装置。6. A means for inquiring location information by a nearby communication means, a means for receiving location information from a responding terminal by a nearby communication means, a means for selecting an appropriate one from a plurality of pieces of received location information, Means for appropriately setting or improving the accuracy of the obtained information, means for transmitting position information in response to an information request from another terminal, and providing the obtained position information to a user through an application program. A mobile terminal device comprising means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28737998A JP2000102060A (en) | 1998-09-25 | 1998-09-25 | Method and system for exchanging position information in mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28737998A JP2000102060A (en) | 1998-09-25 | 1998-09-25 | Method and system for exchanging position information in mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000102060A true JP2000102060A (en) | 2000-04-07 |
Family
ID=17716599
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28737998A Withdrawn JP2000102060A (en) | 1998-09-25 | 1998-09-25 | Method and system for exchanging position information in mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000102060A (en) |
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