WO2005073750A1 - Procede d'acquisition d'une direction vers un point cible avec un dispositif portatif - Google Patents

Procede d'acquisition d'une direction vers un point cible avec un dispositif portatif Download PDF

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Publication number
WO2005073750A1
WO2005073750A1 PCT/CN2005/000051 CN2005000051W WO2005073750A1 WO 2005073750 A1 WO2005073750 A1 WO 2005073750A1 CN 2005000051 W CN2005000051 W CN 2005000051W WO 2005073750 A1 WO2005073750 A1 WO 2005073750A1
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WO
WIPO (PCT)
Prior art keywords
geographic
handheld device
location
current location
information
Prior art date
Application number
PCT/CN2005/000051
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English (en)
French (fr)
Inventor
Chengjun Li
Jilin Li
Zhengwei Wang
Original Assignee
Huawei Technologies Co., Ltd.
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 Huawei Technologies Co., Ltd. filed Critical Huawei Technologies Co., Ltd.
Priority to JP2006548080A priority Critical patent/JP2007527528A/ja
Publication of WO2005073750A1 publication Critical patent/WO2005073750A1/zh
Priority to US11/456,982 priority patent/US7595724B2/en
Priority to US12/542,982 priority patent/US8058989B2/en

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C21/00Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
    • G01C21/20Instruments for performing navigational calculations
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01CMEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C1/00Measuring angles
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S19/00Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/04Details
    • G01S3/046Displays or indicators

Definitions

  • the present invention relates to the technical field of handheld devices, and more particularly, to a method for obtaining a direction of a target location through a handheld device. Background of the invention
  • handheld devices such as mobile phones and personal digital assistants (PDAs) are more and more closely related to people's lives, and handheld devices have become very important personal carry-on items.
  • PDAs personal digital assistants
  • the applicant proposed a solution to make the handheld device have a direction recognition function.
  • This patent application mainly sets a digital compass module in a handheld device, and obtains geomagnetic direction data through the digital compass module; and sets a geomagnetic direction display module, and converts the geomagnetic direction data into graphic display information through the geomagnetic direction display module. The resulting graphic display information is displayed on the screen of the handheld device.
  • the handheld device can have a direction recognition function, that is, the user can determine the geomagnetic direction through the handheld device.
  • users are often not satisfied with determining the geomagnetic direction, and users may also wish to determine the direction of a place relative to their current location.
  • a typical example is: When users go on an adventure, they often need to determine the direction of the destination relative to their own location. Also, Islamic friends need to pay homage to the holy place of Mecca frequently. In sunny and mature conditions, it is obviously very easy to distinguish the direction, but if it is cloudy, or in a rusty place, It is often more difficult to tell the direction. Although the compass can indicate the true north direction for the user, it cannot determine the direction of Mecca relative to the current position for the user.
  • the main object of the present invention is to provide a method for obtaining the direction of a target place through a handheld device, so that a user can determine the direction of a certain place through the handheld device.
  • a method for obtaining a direction of a target place through a handheld device includes the following steps:
  • the handheld device obtains the geographic information of the current location and the geographic information of the target location, and determines the geographic meridian of the current location;
  • the handheld device determines the direction from the current location to the target location according to the geographic information of the current location and the target location, determines the angle between the direction and the geographic meridian of the current location, and determines the location of the current location.
  • step b According to the included angle and display angle determined in step b, obtain the display direction of the direction from the current position to the target point on the screen, and display the direction of the target point relative to the current position on the screen according to the display direction.
  • obtaining the geographical information of the current location by the handheld device is: receiving the geographical information of the current location input by the user; or receiving the geographical information sent by other handheld devices; or setting global positioning in the handheld device System GPS locator, and use the GPS locator to obtain the geographical information of the current location; or obtain the geographical information of the current location through the positioning function of the mobile network; or set the geographical identification and geographic information on the handheld device or the network side
  • the handheld device uses the geographical identification information corresponding to its current location Determine corresponding geographic information from the corresponding relationship;
  • the geographic information includes at least geographic coordinate information.
  • obtaining the geographic information of the target location by the handheld device is: receiving the geographic information of the target location input by the user; or receiving the geographic information of the destination location sent by other handheld devices; or setting the target location in the handheld device in advance Geographic information; or setting the correspondence between the geographical indication of the target location and the geographic information on the handheld device or the network side, and the handheld device determines the corresponding geographic information from the correspondence through the geographic identification information of the target location;
  • the geographic information includes at least geographic coordinate information.
  • obtaining the geographic information by the handheld device includes: storing the correspondence between the geographic identifier and the geographic information in the handheld device, and storing the correspondence between the geographic identifier and the geographic information on the network side.
  • the geographic identifier corresponding to the location or the geographic identifier corresponding to the target location determines whether there is corresponding geographic information in the corresponding relationship saved by itself, and if so, obtains the geographic information; otherwise, the handheld device determines the relationship between the corresponding relationship saved on the network side and the Geographic information corresponding to the geographical indication corresponding to the current location or the geographical indication corresponding to the target location;
  • the geographic information includes at least geographic coordinate information.
  • the geographic identifier is a signal cell identifier, or a geographic name, or a building name of a wireless communication.
  • the handheld device is a mobile communication device
  • the geographic identifier is a signal cell identifier
  • the signal cell identifier is a network device, or a location area, or a cell code corresponding to the signal cell.
  • the handheld device obtains corresponding geographic information from a corresponding relationship saved on the network side through a short message or a preset service command.
  • the handheld device determines the geographic meridian of the current location as: determining the circle passing through the earth's poles and the current location, and using the current location and the semicircle determined by the earth's poles as the current location Geographic meridian.
  • the method may further include: setting a digital compass in the handheld device in advance; in step b, the handheld device determines the display angle of the geographic meridian on the screen of the handheld device as follows: the handheld device determines the clip between the geomagnetic direction and the vertical direction of the screen according to the digital compass. And use this angle as the angle between the geographic meridian and the screen.
  • step C
  • the handheld device obtains the direction from the current location to the target location on the screen according to the included angle and the display angle determined in step b.
  • the display direction on the screen is: between the handheld device and the geographic meridian according to the direction from the current location to the target location And the angle between the geographic meridian and the vertical direction of the screen to determine the angle between the direction from the current location to the target location and the vertical direction of the screen;
  • the direction in which the handheld device displays the target location on the screen with respect to the current location according to the display direction is: displaying according to the angle between the direction from the current location to the target location and the vertical direction of the screen.
  • the method may further include: setting a direction pointer for displaying a direction;
  • step c the display of the direction of the target location relative to the current location on the screen is:
  • the direction pointer uses the vertical direction of the screen as a reference frame, and displays the direction of the target location relative to the current location on the screen.
  • the method may further include: setting a direction identifier for displaying a geomagnetic direction.
  • the handheld device determines the direction from the current location to the target location according to the geographical information of the current location and the target location as follows: the geographical information of the current location and the target location and the geocentric coordinate information
  • the only way to determine the circle on the earth is to determine the short circle formed on the circle from the current location to the target location, and to set the current location along the short arc to the target location as the current location to the target. The direction of the place.
  • the handheld device is a mobile terminal or a personal digital assistant.
  • the solution of the invention obtains the geographic information of the current location and the target location through a handheld device.
  • Information, and the geographic meridian of the current location determine the angle between the current location to the target location direction and the geographic meridian, determine the angle between the geographic meridian and the screen vertical direction, and determine the target location based on the two included angles
  • the angle between the direction and the vertical direction of the screen, and then the direction of the target location is displayed on the screen according to the angle between the direction of the target location and the vertical direction of the screen.
  • the user can determine the target location relative to the current location at any time through the handheld device.
  • the direction of each location brings great convenience to the user.
  • the solution of the invention can realize the acquisition of geographic information through a GPS positioning system.
  • the solution of the present invention can also pre-set relevant geographic information on the handheld device and the network side, for example, pre-set the correspondence between geographic identification and geographic information on the handheld device and / or the network side, so that the handheld device can directly pass The device or the network obtains the corresponding geographic information.
  • the device or the network obtains the corresponding geographic information.
  • the handheld device in the solution of the present invention obtains geographic information of a place, determines the geographic meridian corresponding to the place, the display angle of the geographic meridian on the screen, and the geographic information of the target location, and then can be determined by the handheld device. The direction of the target location relative to that location.
  • FIG. 1 is a flowchart for implementing the solution of the present invention. Mode of Carrying Out the Invention
  • the solution of the present invention is mainly determined by determining the geographic meridian of the position where the geographic meridian is located, and the angle between the geographic meridian and the screen of the handheld device in a vertical direction, and calculating the geocentric center, the position where the user is located, and the target location connected on the earth The angle between the arc of and the geographic meridian, and then determine the direction and direction of the target location relative to its own location based on the two angles The angle of the vertical direction of the screen of the handheld device, and the direction of the target location relative to its own position is displayed on the screen of the handheld device through the angle.
  • Step 101 When the user needs to determine the direction of a target location, the user obtains the current location and geographic information of the target location through a handheld device.
  • the geographic information should include geographic coordinate information (Gs), so that the handheld device can make corresponding calculations based on the information.
  • Gs geographic coordinate information
  • the handheld device When the handheld device obtains the geographical information of the current location, the handheld device may be obtained through a global positioning system (GPS). For example, a GPS locator is set in the handheld device, and the geographical information of the current location is obtained through the locator. For the mobile terminal device, the geographic information of the current location can also be obtained through the positioning function of the mobile network.
  • GPS global positioning system
  • a correspondence table between geographic identification and geographic coordinate information can also be established in the user's handheld device.
  • the handheld device can be based on a geographical identification, such as A building's name or number, or geographic identification information such as a street or a park's geographic name, finds the corresponding geographic coordinate information from the corresponding relationship.
  • the geographic identifier stored in the correspondence table may also be related information of a signal cell in a wireless communication system.
  • the related information of a signal cell in a mobile communication network may be a current location area or a cell code of a mobile terminal.
  • the handheld device when the handheld device is roaming, the handheld device can obtain corresponding location area or cell coding information, and then obtain corresponding geographic information from the corresponding relationship according to the coding information.
  • the handheld device can obtain the identity of the access device in the wireless communication system, for example, a wireless local area network
  • WLAN wireless local area network
  • AP access point
  • BTS base station equipment
  • the coded information may also be used as the geographic identification information ii
  • a correspondence table of geographic information can also be set for each city on the network side.
  • the correspondence table includes the correspondence between geographic identification information and geographic coordinate information.
  • the correspondence table can also be called a correspondence database.
  • the handheld device obtains the corresponding geographic coordinate information from the correspondence database on the network side according to the geographic identifier.
  • the process may specifically be as follows: the handheld device sends a short message containing a geographic identifier to the network-side device that stores the correspondence database, and the network-side device searches for the corresponding geographic coordinate information from the correspondence database saved by itself according to the geographic identifier. , And send the found geographic coordinate information to the handheld device via a short message.
  • the device can further add a command code to the short message sent to the handheld device, and the handheld device can use the command code to determine whether the short message received by the device carries geographic information.
  • the handheld device may also directly send a command to the network-side device that stores the correspondence database, and the network-side device determines the corresponding geographical identification information according to the current roaming information of the handheld device such as the location area and the cell, and according to this
  • the geographic identification information obtains corresponding geographic information from the saved correspondence, and serves as geographic information of the current location of the handheld device. In this way, the cost of the handheld device can be reduced.
  • Corresponding service commands can also be set for the network side, and the handheld device can obtain the corresponding geographic information from the network side through the service command containing the geographic identifier.
  • the user can of course also enter a geographic information into the handheld device by manual input.
  • a geographic information into the handheld device by manual input.
  • the user knows the geographic information of his current location, he can also enter the geographic information in advance.
  • the geographic information may also be sent by other users.
  • the handheld device When the handheld device acquires the geographic information of the target location, it can be input by the user in advance, or it can be sent by other users, or it can be preset by the handheld device manufacturer in advance. Similar to obtaining the geographic information of the current location, it is also possible to set a corresponding correspondence database on the handheld device or the network side, and the handheld device obtains the corresponding geographic information through interaction with the correspondence database, for example, on the network side The corresponding relationship between the holy place Mecca and the geographic location is set in the correspondence database, and the handheld device can obtain the corresponding geographic location through the geographic name Mecca. Information.
  • the correspondence between some commonly used geographical identifiers and geographic information can be stored in the handheld device.
  • the user for the current location, the user ’s work and life The location of the mobile phone is often the same. Therefore, the corresponding relationship between the resident cell and neighboring cell of the handheld device and the geographic information can be set in the handheld device.
  • users often live and work in two small areas or in the same location area. At this time, the user can use these two communities or locations as their permanent residential areas.
  • the target location since the target location that the user needs to find is often fixed, the corresponding relationship between these target locations and geographic information can be set in the handheld device.
  • Step 102 The handheld device determines the geographic meridian of the current location of the handheld device.
  • the geographic meridian of the current location of the handheld device can be determined by the location and the geographic coordinates of the two poles of the earth: First, determine the circle centered on the center of the earth, passing through the two levels of the earth and the current location, and determine the circle on the circle from the current location.
  • the semicircle defined by the location and the two levels of the earth is regarded as the geographic meridian with the location of Gs.
  • Step 103 The handheld device determines the direction from the current location of the handheld device to the target location according to the geographical information of the current location of the handheld device and the target location and the geographic meridian of the current location, and determines the distance between the direction and the geographic meridian. Angle.
  • the included angle When calculating the included angle, first determine the current location of the handheld device to the target location.
  • Direction Specifically, the circular section on the earth can be uniquely determined according to the geographical location information of the current location of the handheld device and the target location, and the coordinate information of the center of the earth.
  • the circumference of the arc is cut into two arcs. Based on the current coordinates of the handheld device and the geographic coordinates of the target location, the length of the two arcs can be calculated. The shorter one is selected and the handheld device is currently located. The position of the position along the shorter arc to the target location is taken as the positive direction of the target location relative to the current location.
  • the direction from the current location of the handheld device to the target location along the longer arc is taken as the opposite direction of the target location relative to the current location of the handheld device.
  • Step 104 The handheld device determines the display angle of the geographic meridian at the current location on the screen of the handheld device.
  • the angle between the geographic meridian and the vertical direction of the screen can be determined by determining the angle between the geomagnetic direction and the vertical direction of the screen. Therefore, the handheld device can determine the direction of the target location relative to the current location and the screen of the handheld device by the angle between the geographic meridian and the vertical direction of the screen and the angle between the direction of the target location and the geographic meridian. The included angle in the vertical direction.
  • the included angle between the geomagnetic direction and the vertical direction of the screen can be achieved by setting a digital compass in the handheld device.
  • Step 105 Obtain the display direction of the direction from the current position to the target location on the screen according to the included angle and the display angle determined in steps 103 and 104, and display the display direction on the screen.
  • the handheld device determines the direction from the current location to the target location and the screen according to the angle between the direction from the current location to the target location and the geographic meridian, and the vertical angle between the geographic meridian and the screen. The angle between the vertical directions. After that, holding The device then displays the direction according to the angle between the direction from the current location to the target location and the vertical direction of the screen.
  • the handheld device When the handheld device displays the direction, it can be a preset direction pointer for displaying the direction.
  • the direction pointer can use the vertical direction of the screen as a reference system, and displays the direction of the target location relative to the current position on the screen.
  • a circle can also be set. The fixed end of the direction up to is set at the center of the circle, and the movable end points to the circle's circumference.
  • the solution of the present invention can further determine the distance between the current location of the handheld device and the target location, so that the user can obtain more information.
  • the distance may be only the distance in the square direction, and of course, the distance in the opposite direction may also be provided.

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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)
  • Navigation (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Description

一种通过手持设备获取目标地点方向的方法 技术领域
本发明涉及手持设备技术领域, 更确切地说是涉及一种通过手持设 备获取目标地点方向的方法。 发明背景
目前, 诸如手机、 个人数字助理(PDA )之类的手持设备与人们的 生活越来越密切相关, 手持设备已经成为人们很重要的随身携带品。 鉴 于这种情况, 人们想到是否能在手持设备中设置更多的功能, 以使手持 设备能够更好地为用户服务。
在本申请人另一篇申请号为 "200410000427.8"、 名为 《一种手持设 备及实现方法》的中国专利申请中, 提出了使手持设备具有方向识别功 能的方案。 该篇专利申请主要是在手持设备中设置数字指南针模块, 通 过该数字指南针模块获取地磁方向数据; 并设置地磁方向显示模块, 通 过该地磁方向显示模块将地磁方向数据转换为图形显示信息, 之后将得 到的图形显示信息显示在手持设备的屏幕上。 基于该篇专利申请, 手持 设备可以具有方向识别功能, 也就是说, 用户可以通过手持设备确定地 磁方向。
但是, 用户往往不满足于确定地磁方向, 用户还有可能希望确定某 个地点相对自身当前所处位置的方向。 一个比较典型的例子是: 用户在 外出探险时, 需要经常地确定目的地相对自身所在位置的方向。 还有, 伊斯兰朋友需要经常地向着圣地麦加进行朝拜,在晴天、地熟的情况下, 辨别方向显然非常简单, 但如果是在阴天, 或者是在一个生疏的地方, 则往往比较难辨别方向。 虽然指南针能够为用户指示正北方向, 但是不 能为用户确定麦加相对于当前位置的方向。
到目前为止, 还没有出现通过手持设备为用户确定某个地点所在方 向的方案。 发明内容
有鉴于此, 本发明的主要目的在于提供一种通过手持设备获取目标 地点方向的方法, 以使用户可以通过手持设备确定某个地点的方向。
为达到以上目的, 本发明的技术方案是这样实现的: 一种通过手持 设备获取目标地点方向的方法, 该方法包括以下步骤:
a. 手持设备获取当前所处位置的地理信息以及目标地点的地理信 息, 并确定当前所处位置的地理子午线;
b. 手持设备根据当前所处位置和目标地点的地理信息确定当前所 处位置到目标地点的方向, 确定该方向与当前所处位置的地理子午线之 间的夹角, 并确定当前所处位置的地理子午线在手持设备屏幕上的显示 角度;
c根据步骤 b中确定的夹角和显示角度得到当前所处位置到目标地 点的方向在屏幕上的显示方向, 并根据该显示方向在屏幕中显示目标地 点相对于当前所处位置的方向。
所述步骤 a中, 所述手持设备获取当前所处位置的地理信息为: 接 收用户输入当前所处位置的地理信息; 或接收其他手持设备发送来的地 理信息; 或在手持设备中设置全球定位系统 GPS定位器,并通过该 GPS 定位器获取当前所处位置的地理信息; 或通过移动网络的定位功能获取 当前所处位置的地理信息; 或在手持设备或网络侧设置地理标识与地理 信息的对应关系, 手持设备通过自身当前所处位置对应的地理标识信息 从该对应关系中确定相应的地理信息;
所述地理信息至少包括地理坐标信息。
所述步骤 a中, 所述手持设备获取目标地点的地理信息为: 接收用 户输入的目标地点地理信息; 或接收其他手持设备发送来的目标地点地 理信息; 或预先在手持设备中设置目标地点的地理信息; 或在手持设备 或网络侧设置目标地点的地理标识与地理信息的对应关系, 手持设备通 过目标地点的地理标识信息从该对应关系中确定相应的地理信息;
所述地理信息至少包括地理坐标信息。
所述步骤 a中, 所述手持设备获取地理信息包括: 在手持设备中保 存地理标识与地理信息的对应关系, 并在网络侧保存地理标识与地理信 息的对应关系, 手持设备根据自身当前所处位置对应的地理标识或目标 地点对应的地理标识, 判断自身保存的对应关系中是否存在相应的地理 信息, 如果有, 则获取该地理信息; 否则, 手持设备从网络侧保存的对 应关系中确定与自身当前所处位置对应的地理标识或目标地点对应的 地理标识所对应的地理信息;
所述地理信息至少包括地理坐标信息。
所述地理标识为无线通信的信号小区标识、 或地理名称、 或建筑物 名称。
所述手持设备为移动通信设备, 所述地理标识为信号小区标识, 所 述信号小区标识为信号小区所对应的网络设备,或位置区,或小区编码。
所述手持设备通过短消息或预先设置的业务命令从网絡侧保存的对 应关系中获取相应的地理信息。
步骤 a中, 所述手持设备确定当前所处位置的地理子午线为: 确定 穿过地球两极及当前所处位置的圓, 并将当前所处位置与地球两极所确 定的半圆作为与当前所处位置的地理子午线。 该方法可以进一步包括: 预先在手持设备中设置数字指南针; 步骤 b中, 所述手持设备确定地理子午线在手持设备屏幕上的显示 角度为: 手持设备根据数字指南针确定地磁方向与屏幕垂直方向的夹 角, 并将该夹角作为地理子午线与屏幕垂直方向的夹角。
所述步骤 C中 ,
所述手持设备根据步骤 b中确定的夹角和显示角度得到当前所处位 置到目标地点的方向在屏幕上的显示方向为: 手持设备根据当前所处位 置到目标地点的方向与地理子午线之间的夹角, 以及地理子午线与屏幕 垂直方向之间的夹角, 确定当前所处位置到目标地点的方向与屏幕垂直 方向之间的夹角;
所述手持设备根据该显示方向在屏幕中显示目标地点相对于当前所 处位置的方向为: 才艮据当前所处位置到目标地点的方向与屏幕垂直方向 之间的夹角进行显示。
该方法可以进一步包括: 设置用于显示方向的方向指针;
步骤 c中, 所述在屏幕中显示目标地点相对于当前所处位置的方向 为: 方向指针以屏幕垂直方向为参照系, 在屏幕中显示目标地点相对于 当前所处位置的方向。
该方法还可以进一步包括: 设置用于显示地磁方向的方向标识。 所述步骤 b中, 所述手持设备根据当前所处位置和目标地点的地理 信息确定当前所处位置到目标地点的方向为: 由当前所处位置和目标地 点的地理信息以及地心的坐标信息, 唯一确定在地球上的圆周, 确定当 前所处位置到目标地点在该圆周上形成的短圆弧, 并将当前所处位置沿 该短圓弧到目标地点的方向为当前所处位置到目标地点的方向。
所述手持设备为移动终端或个人数字助理。
本发明方案通过手持设备获取当前所处位置及目标地点的地理信 息, 以及当前所处位置的地理子午线, 确定当前所处位置到目标地点方 向与地理子午线之间的夹角, 确定地理子午线与屏幕垂直方向的夹角, 并根据这两个夹角确定目标地点方向与屏幕垂直方向之间的夹角, 之后 根据该目标地点所在方向与屏幕垂直方向的夹角在屏幕中显示出目标 地点所在的方向, 使用户能够通过手持设备随时确定目标地点相对于当 前所处位置的方向, 给用户带来了很大的方便。
本发明方案可以通过 GPS定位系统实现地理信息的获取。
本发明方案还可以将相关地理信息预先设置在手持设备及网络侧, 比如,将地理标识与地理信息的对应关系预先设置在手持设备和 /或网络 侧, 使得手持设备根据地理标识可以直接通过本设备或网络侧获取相应 的地理信息,这样相比在终端增加 GPS定位系统而言,在满足了低端用 户需求的同时, 还节约了设备的成本。
本发明方案中的手持设备通过获取某个地点的地理信息、 确定该地 点所对应的地理子午线、 该地理子午线在屏幕中的显示角度, 以及目标 地点的地理信息, 而后, 就可以通过手持设备确定目标地点相对于该地 点的方向。 附图简要说明
图 1为本发明方案的实现流程图。 实施本发明的方式
本发明方案主要是通过确定自身所处位置的地理子午线, 以及地理 子午线与手持设备屏幕垂直方向的夹角, 并计算出以地心为圓心、 自身 所处位置和目标地点在地球上连接所成的圓弧与该地理子午线之间的 夹角, 然后再根据这两个夹角确定目标地点相对自身所处位置的方向与 手持设备屏幕垂直方向的夹角, 并通过该夹角将目标地点相对自身所处 位置的方向在手持设备的屏幕中显示出来。
下面结合附图及具体实施例对本发明方案作进一步详细的说明。 参见图 1 , 本发明方案通过以下步骤实现:
步骤 101、 用户在需要确定某个目标地点的方向时, 通过手持设备 获取当前所处位置及目标地点的地理信息。
这里的地理信息都应该包括地理坐标信息 (Gs ), 以便于手持设备 根据该信息作相应的计算。
手持设备在获取当前所处位置的地理信息时, 手持设备可以是通过 全球定位系统(GPS )获取, 比如, 在手持设备中设置一个 GPS定位器, 通过该定位器获取当前位置的地理信息。 对于移动终端设备来说, 也可 以是通过移动网络的定位功能来获取当前所处位置的地理信息。
由于在手持设备上实现 GPS定位系统会显著增加手持设备的成本, 因此, 还可以在用户的手持设备中建立地理标识与地理坐标信息的对应 关系表, 手持设备则可以根据一个地理标识, 比如根据一个建筑物的名 称或者编号, 或者街道、 公园之类的地理名称等地理标识信息, 从对应 关系中查找到对应的地理坐标信息。 对应关系表中保存的地理标识也可 以是无线通信系统中信号小区的相关信息, 比如, 移动通信网络中信号 小区相关信息可以是移动终端当前的位置区或小区编码等。 这样, 手持 设备在漫游时, 手持设备可以获取对应的位置区或小区编码信息, 然后 根据该编码信息从该对应关系中获取相应的地理信息。 当然, 如果手持 设备能够获取无线通信系统中接入设备的标识, 比如, 无线局域网
( WLAN ) 中接入点(AP )的编码等信息, 或者无线通信系统中的基站 设备(BTS )信息, 这时, 也可以将该编码信息作为所述的地理标识信 ii 实际当中, 还可以在网络侧针对每个城市设置一个地理信息的对应 关系表, 该对应关系表中包括地理标识信息和地理坐标信息的对应关 系, 该对应关系表也可称为对应关系库, 手持设备根据地理标识从网络 侧的对应关系库中获取相应的地理坐标信息。 该过程具体可以为: 手持 设备向保存对应关系库的网络侧设备发送一个包含地理标识的短消息, 该网络侧设备才艮据该地理标识从自身保存的对应关系库中查找相应的 地理坐标信息, 并将查找到的地理坐标信息通过短消息发送给手持设 备。 该设备还可以进一步在发送给手持设备的短消息中增加一个命令 码, 手持设备即可通过该命令码判断自身收到的短消息中是否携带了地 理信息。 当然, 手持设备也可以直接向保存对应关系库的网络侧设备发 送一个命令, 该网络侧设备根据该手持设备诸如所在位置区、 小区之类 的当前漫游信息确定相应的地理标识信息, 并根据此地理标识信息从保 存的对应关系中得到相应的地理信息, 作为手持设备当前所处位置的地 理信息。 通过这种方式, 可以降低手持设备的成本。
还可以为网络侧设置相应的业务命令, 由手持设备通过含有地理标 识的业务命令从网络侧获取相应的地理信息。
用户当然也可以通过手工输入的方式给手持设备输入一个地理信 息。 当然, 如果用户知道自身当前所处位置的地理信息, 也可以事先输 入该地理信息。 该地理信息还可以是其他用户发送来的。
手持设备在获取目标地点的地理信息时, 可以由用户根据需要提前 输入,也可以由其他用户发送过来,还可以是手持设备厂家提前预置的。 与获取当前所处位置的地理信息类似, 同样可以是在手持设备或网络侧 设置相应的对应关系库, 由手持设备通过与该对应关系库的交互获取相 应的地理信息, 比如, 在网络侧的对应关系库中设置圣地麦加与地理位 置的对应关系, 则手持设备即可通过麦加这个地理名称获取相应的地理 信息。
另外, 不管是获取目标地点还是当前所处位置的地理信息, 都可以 在手持设备中保存一些常用的地理标识与地理信息的对应关系, 比如, 对于当前所处位置来说, 由于用户工作和生活的地点往往不变, 因此可 以在手持设备中设置手持设备常驻小区及相邻小区等的相关信息与地 理信息的对应关系。 比如, 用户经常生活和工作的地点一般都在两个小 区或者在同一个位置区内, 这时, 用户可以将这两个小区或位置作为其 常驻小区。 对于目标地点来说, 由于用户需要查找的目标地点往往是固 定的几个, 因此可以在手持设备中设置这几个目标地点与地理信息的对 应关系。 当然, 还可以在网络侧保存所有可能的目标地点的地理标识与 地理信息的对应关系。 基于这样的设置, 手持设备在需要获取相应的地 理信息时, 就可以先判断自身的手持设备中是否已经保存了该地理信 息, 在自身没有保存该地理信息的情况下, 再通过网络侧查找该地理信 息。通过这种设置,可以在保证用户手持设备维护较少数据信息的同时, 保证手持设备能够获取到相关的地理信息, 从而, 尽可能地减少访问网 络的次数, 以节省访问费用。
步骤 102、 手持设备确定手持设备当前所处位置的地理子午线。 手持设备当前所处位置的地理子午线可以由该位置以及地球两极的 地理坐标来确定: 首先确定以地心为圆心、 穿过地球两级及当前所处位 置的圓, 并将该圆周上由当前所处位置与地球两级所确定的半圓作为与 Gs所处位置的地理子午线。
步骤 103、 手持设备根据手持设备当前所处位置和目标地点的地理 信息以及当前所处位置的地理子午线, 确定手持设备当前所处位置到目 标地点的方向, 并确定该方向与地理子午线之间的夹角。
在计算该夹角时, 首先需要确定手持设备当前所处位置到目标地点 的方向。 具体来说, 可以根据手持设备当前所处位置和目标地点的地理 信息以及地心的坐标信息, 唯一地确定在地球上的圆形切面, 手持设备 当前所处位置与目标地点将该圓形切面的圆周截成两段圓弧, 根据手持 设备当前所处位置与目标地点的地理坐标, 可以计算出两段圓弧的长 度, 选择其中较短的那条圆孤, 并将手持设备当前所处位置沿着较短的 那条圆弧到目标地点的方向作为目标地点相对于当前所处位置的正方 向。 对应地, 将手持设备当前所处位置沿着较长圓弧到目标地点的方向 作为目标地点相对于手持设备当前所处位置的反方向。
当然, 也可以使用其它计算方法来得到手持设备当前所处位置到目 标地点的正方向和反方向。
步骤 104、 手持设备确定当前所处位置的地理子午线在手持设备屏 幕上的显示角度。
由于地理子午线方向可以看作与地磁方向一致, 因此可以通过确定 地磁方向与屏幕垂直方向的夹角来确定地理子午线与屏幕垂直方向的 夹角。 从而手持设备可以通过地理子午线与屏幕垂直方向的夹角, 以及 目标地点当对当前所处位置的方向与地理子午线之间的夹角, 来确定目 标地点相对当前所处位置的方向与手持设备屏幕垂直方向的夹角。
这里, 地磁方向与屏幕垂直方向的夹角具体可以通过在手持设备中 设置数字指南针实现。
步骤 105、 根据步骤 103及 104中确定的夹角及显示角度得到当前 所处位置到目标地点的方向在屏幕上的显示方向, 并将该显示方向显示 在屏幕中。
具体来说, 手持设备根据当前所处位置到目标地点的方向与地理子 午线之间的夹角, 以及地理子午线与屏幕垂直方向之间的夹角, 确定当 前所处位置到目标地点的方向与屏幕垂直方向之间的夹角。 之后, 手持 设备再根据当前所处位置到目标地点的方向与屏幕垂直方向之间的夹 角进行方向显示。
手持设备在显示该方向时, 可以是预先设置用于显示方向的方向指 针, 方向指针可以屏幕垂直方向为参照系, 在屏幕中显示目标地点相对 于当前所处位置的方向。 为便于显示, 还可以设置一个圆, 将方向直至 的固定一端设置在该圆的圓心, 活动的一端则指向该圆的圆周。 同时还 可以设置正东、 正西、 正南、 正北四个方向标识, 并按照上述底层方向 与屏幕垂直方向的夹角, 将四个方向标识垂直分布显示在该圓的圓周 上。然后再通过该方向指针、方向标识及圆来显示目标地点所在的方向。
通过上述处理过程, 即可实现本发明的目的。
另外, 本发明方案还可以进一步确定手持设备当前所处位置到目标 地点之间的距离, 以便用户能够获取更多的信息。 该距离可以只是正方 向上的距离, 当然, 也可以提供反方向上的距离。
以上所述仅为本发明方案的较佳实施例, 并不用以限定本发明的保 护范围。

Claims

权利要求书
1、一种通过手持设备获取目标地点方向的方法, 其特征在于, 该方 法包括以下步骤:
a. 手持设备获取当前所处位置的地理信息以及目标地点的地理信 息, 并确定当前所处位置的地理子午线;
b. 手持设备根据当前所处位置和目标地点的地理信息确定当前所 处位置到目标地点的方向, 确定该方向与当前所处位置的地理子午线之 间的夹角, 并确定当前所处位置的地理子午线在手持设备屏幕上的显示 角度;
c根据步骤 b中确定的夹角和显示角度得到当前所处位置到目标地 点的方向在屏幕上的显示方向, 并根据该显示方向在屏幕中显示目标地 点相对于当前所处位置的方向。
2、根据权利要求 1所述的方法, 其特征在于所述步骤 a中, 所述手 持设备获取当前所处位置的地理信息为: 接收用户输入当前所处位置的 地理信息; 或接收其他手持设备发送来的地理信息; 或在手持设备中设 置全球定位系统 GPS定位器, 并通过该 GPS定位器获取当前所处位置 的地理信息; 或通过移动网络的定位功能获取当前所处位置的地理信 息; 或在手持设备或网络侧设置地理标识与地理信息的对应关系, 手持 设备通过自身当前所处位置对应的地理标识信息从该对应关系中确定 相应的地理信息;
所述地理信息至少包括地理坐标信息。
3、根据权利要求 1所述的方法, 其特征在于所述步骤 a中, 所述手 持设备获取目标地点的地理信息为: 接收用户输入的目标地点地理信 息; 或接收其他手持设备发送来的目标地点地理信息; 或预先在手持设 备中设置目标地点的地理信息; 或在手持设备或网络侧设置目标地点的 地理标识与地理信息的对应关系, 手持设备通过目标地点的地理标识信 息从该对应关系中确定相应的地理信息;
所述地理信息至少包括地理坐标信息。
4、根据权利要求 1所述的方法, 其特征在于所述步骤 a中, 所述手 持设备获取地理信息包括: 在手持设备中保存地理标识与地理信息的对 应关系, 并在网络侧保存地理标识与地理信息的对应关系, 手持设备根 据自身当前所处位置对应的地理标识或目标地点对应的地理标识, 判断 自身保存的对应关系中是否存在相应的地理信息, 如果有, 则获取该地 理信息; 否则, 手持设备从网络侧保存的对应关系中确定与自身当前所 处位置对应的地理标识或目标地点对应的地理标识所对应的地理信息; 所述地理信息至少包括地理坐标信息。
5、 根据权利要求 2、 3或 4所述的方法, 其特征在于, 所述地理标 识为无线通信的信号小区标识、 或地理名称、 或建筑物名称。
6、 根据权利要求 2、 3或 4所述的方法, 其特征在于, 所述手持设 备为移动通信设备, 所述地理标识为信号小区标识, 所述信号小区标识 为信号小区所对应的网络设备, 或位置区, 或小区编码。
7、 根据权利要求 2、 3或 4所述的方法, 其特征在于, 所述手持设 备通过短消息或预先设置的业务命令从网絡侧保存的对应关系中获取 相应的地理信息。
8、根据权利要求 1所述的方法, 其特征在于所述步骤 a中, 所述手 持设备确定当前所处位置的地理子午线为: 确定穿过地球两极及当前所 处位置的圓, 并将当前所处位置与地球两极所确定的半圆作为与当前所 处位置的地理子午线。
9、 根据权利要求 8所述的方法, 其特征在于, 该方法进一步包括: 预先在手持设备中设置数字指南针;
步骤 b中, 所述手持设备确定地理子午线在手持设备屏幕上的显示 角度为: 手持设备根据数字指南针确定地磁方向与屏幕垂直方向的夹 角, 并将该夹角作为地理子午线与屏幕垂直方向的夹角。
10、 根据权利要求 9所述的方法, 其特征在于所述步骤 c中, 所述手持设备根据步骤 b中确定的夹角和显示角度得到当前所处位 置到目标地点的方向在屏幕上的显示方向为: 手持设备根据当前所处位 置到目标地点的方向与地理子午线之间的夹角, 以及地理子午线与屏幕 垂直方向之间的夹角, 确定当前所处位置到目标地点的方向与屏幕垂直 方向之间的夹角;
所述手持设备根据该显示方向在屏幕中显示目标地点相对于当前所 处位置的方向为: 根据当前所处位置到目标地点的方向与屏幕垂直方向 之间的夹角进行显示。
11、根据权利要求 10所述的方法,其特征在于,该方法进一步包括: 设置用于显示方向的方向指针:
步骤 c中, 所述在屏幕中显示目标地点相对于当前所处位置的方向 为: 方向指针以屏幕垂直方向为参照系, 在屏幕中显示目标地点相对于 当前所处位置的方向。
12、才艮据权利要求 11所述的方法,其特征在于,该方法进一步包括: 设置用于显示地磁方向的方向标识。
13、 根据权利要求 1所述的方法, 其特征在于所述步骤 b中, 所述 手持设备根据当前所处位置和目标地点的地理信息确定当前所处位置 到目标地点的方向为: 由当前所处位置和目标地点的地理信息以及地心 的坐标信息, 唯一确定在地球上的圆周, 确定当前所处位置到目标地点 在该圆周上形成的短圓弧, 并将当前所处位置沿该短圆弧到目标地点的 方向为当前所处位置到目标地点的方向。
14、 根据权利要求 1所述的方法, 其特征在于, 所述手持设备为移 动终端或个人数字助理。
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