JP2005043234A - Map delivery system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a map delivery system capable of acquiring only necessary map information by a simple constitution. <P>SOLUTION: A terminal device 100 determines the range of a map to be required to a center device 200, extracts all map units covering the range, and transmits the ID and the version of the extracted map unit respectively to the center device 200. The center device 200 receives the ID and the version of the map unit from the terminal device 100. When the version is zero, or when the version is older than versions stored in the center device 200, the center device 200 registers the ID of the map unit of the version in a return list, and transmits map information and the version in the map unit having the registered ID respectively to the terminal device 100. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a map distribution system which requests a required map information from a center device and distributes necessary map information from the center device.

  2. Description of the Related Art Conventionally, a map distribution system is widely known in which when a terminal device requests a required map information from a center device, the map information is extracted by the center device and transmitted to the terminal device (for example, , See Patent Document 1).

In such a map distribution system, simply sending the current position to the center, the center extracts the detailed map including the current position and the detailed map around it, and sends it to the terminal. It can be obtained more arbitrarily and is very convenient.
JP 2001-82965 A (page 2-11, FIG. 1)

  However, in the above map distribution system, it is necessary to always obtain map information from the center, and there is a problem that the acquisition is troublesome and takes time, which is not preferable.

  The present invention has been made in view of such a problem, and provides a map distribution system in which only necessary map information can be obtained with a simple configuration.

  The map distribution system of the present invention is a map distribution system including a center device and a terminal device that communicates with the center device, and a map request range determining means for determining a range of a map requested to the center device from the terminal device; The map unit extraction means for extracting all map units covering the map request range determined by the map request range determination means, and the ID and version of the map unit extracted by the map unit extraction means are respectively stored in the center device. A transmission means for transmitting, a receiving means for receiving the ID and version of the map unit transmitted from the terminal device in the center device, and a version based on the ID and version of the map unit received by the receiving means. Even if it is 0 and the version is not 0, the buffer received by the receiving means If John is older than the map unit version having the same ID as the map unit stored in the center device, the registration unit registers the map unit ID in the return list, and the registration unit registers the map unit ID. The map unit of the ID is extracted, and the transmission unit for transmitting the map information and version of the map unit to the terminal device is provided.

  With this configuration, it becomes possible to effectively obtain and update only the map information of the necessary map unit whose version is new, and there is an effect that unnecessary map information need not be obtained.

  In the map distribution system of the present invention, when the version of the received map unit is the same in the center device as compared with the version of the map unit having the same ID as the map unit stored in the center device. And a means for leaving the received version of the map unit unattended.

  With this configuration, when the received version of the map unit is the same as the version of the map unit stored in the center device, it is ignored. In such a case, the information of the map unit is sent to the terminal device. The transmission efficiency is improved without transmission.

  In the map distribution system of the present invention, the terminal device is provided with a transmission order determining means for determining a desired transmission order of the map units extracted by the map unit extracting means, and the terminal means transmitting means is a transmission order determining means. Is transmitted to the center device together with the map unit ID and version extracted by the map unit extraction unit, and the transmission unit of the center device transmits the map information in the map unit of the ID registered in the registration unit and Each version is transmitted to the terminal device one map unit according to the transmission order.

  With this configuration, the transmission order of the map units required in the terminal device is determined in advance, and the map information and version of the map unit required for each map unit can be obtained according to the order, and the obtained map unit It has the effect that it can be stored and updated in order and used for use.

  In the map distribution system of the present invention, the center device is provided with means for detecting a communication error with the terminal device, and when this detecting means detects a communication error with the terminal device, the map unit having the communication error is detected. After that, the map information and version of the map unit are transmitted again one unit at a time.

  With this configuration, even if there is a communication error, communication is started again from the map unit in which the communication error has occurred, and the communication efficiency is improved.

  The map distribution system of the present invention is a map distribution system that includes a center device and a terminal device that communicates with the center device, and determines a map request range determination for determining a range of a map requested to the terminal device. Means, a map unit extracting means for extracting all map units covering the map request range determined by the map request range determining means, and the ID of the map unit extracted by the map unit extracting means to the center device. A transmission means for transmitting, a receiving means for receiving the ID of the map unit transmitted from the terminal device in the center device, and a version of the ID in the map unit based on the ID received by the receiving means, respectively. Transmitting means for transmitting to the terminal device, and the map unit received from the center device in the terminal device. Based on the version, it has transmitted the ID of the map units required to the center device, to obtain the map information and the version of the map units required from center device configuration.

  With this configuration, a necessary map unit can be arbitrarily selected in advance in the terminal device, and only the map information and version of the selected map unit can be obtained from the center device, and there is no need to exchange useless information. It has the action.

The map distribution system of the present invention includes a map request range determination means for determining a range of a map requested to a center device in a terminal device, and all map units that cover the map request range determined by the map request range determination means. A map unit extracting means for extracting the map unit, and a transmitting means for transmitting the ID and version of the map unit extracted by the map unit extracting means to the center device, respectively. Based on the receiving means for receiving the ID and version and the ID and version of the map unit received by the receiving means, the version is stored in the center device even when the version is 0 and when the version is not 0. Compared with the version of the map unit with the same ID as the ID of the map unit If it is old, the registration means for registering the ID of the map unit in the return list, the map unit of the ID registered in the registration means is extracted, and the map information and version of the map unit are transmitted to the terminal device, respectively. Therefore, only the map information of the necessary map unit whose version has been updated can be effectively obtained and updated, and there is an effect that it is not necessary to obtain useless map information.

  Hereinafter, a map distribution system according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a schematic configuration diagram of a map distribution system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating an example of a map unit used in the map distribution system according to an embodiment of the present invention. FIG. 3 is a diagram showing the ID and version of a map unit used in the map distribution system in one embodiment of the present invention, and FIG. 4 is a flowchart showing the operation of the map distribution system in one embodiment of the present invention. It is.

  As shown in FIG. 1, the map distribution system according to an embodiment of the present invention includes a terminal device 100 and a center device 200.

  The terminal device 100 includes a positioning unit 101 such as a GPS receiver that measures the current position and autonomous navigation, an operation unit 102 such as a keyboard, a display unit 103 that displays the current position and map information, and a memory that stores map information. Unit 104, communication unit 105 that communicates with center device 200, and control unit 106 that controls them, center device 200 includes communication unit 201 that communicates with terminal device 100, and storage unit that stores map information 202, a version management unit 203 that manages the version of the map information stored in the storage unit 202, and a control unit 204 that controls them.

  In addition, the map information is divided into squares, for example, a map of the whole country such as 200 meters on one side, 400 meters, or 1 kilometer, and for each of these divided map units, as shown in FIG. Each version information is given. That is, the map information is updated every time a road, a bridge, a building, an event venue, or the like is newly established or abolished, and the map unit version is changed to a new version each time the map information is updated.

  Next, the operation of the map distribution system in the present embodiment will be described.

  In the terminal device 100, the map information obtained so far is the map unit of the possessed map range as shown in FIG. 2, and only the map information, ID, and version of this map unit are stored in the storage unit 104. The case will be described. The arrow indicates the current position measured by the positioning unit 101, and the current position and map information around the current position are displayed on the display unit 103.

  When the current position moves in the direction of the arrow, the map information in that direction will soon disappear in the storage unit 104, so the control unit 106 maps the current position measured by the positioning unit 101 and the map information stored in the storage unit 104. The map information in the storage unit 104 will soon be absent in the moving direction of the current position, and the communication unit 105 is automatically informed to the center device 200 before it is detected. A signal for requesting map information in that direction is transmitted via.

At the time of transmission, as shown in FIG. 4, a requested map range to be requested from the current position and its traveling direction is determined as shown in FIG. 2 (S401), and all or part of the range is included in the range Are extracted as map units within the necessary map range (S402). Then, the IDs and versions of all the extracted map units are transmitted to the center device 200 through the communication unit 105 (S403).

  For example, in the case of FIG. 2, since the current position is at the position of the map unit (14-14) and the map information of the traveling direction will soon be lost, the traveling direction of the current position is predetermined based on the current position. A map range is determined as a map request range. That is, in this case, nine map units (14-12), (14-13), (14-14), (15-12), (15-13), (15-13), ( 15-14), (16-12), (16-13), (16-14) are extracted as map units in the necessary map area, and these map units (14-12), (14-13), ( 14-14), (15-12), (15-13), (15-14), (16-12), (16-13), and the ID and version of (16-14) indicate the communication unit 105, respectively. To the center device 200 via

  By the way, among the extracted map units, the map units (14-12), (14-13), (14-14), (15-13), and (15-14) already exist in the storage unit 104. However, the other map units (15-12), (16-12), (16-13), and (16-14) do not exist in the storage unit 104. In such a case, the map units (15-12), (16-12), (16-13), and (16-14) that do not exist in the storage unit 104 are all set to 0, and the ID is sent to the center device 200 together with the ID. Send.

  In this way, map units (14-12), (14-13), (14-14), (15-12), (15-13), (15-14), (16-12) of the necessary map range ), (16-13), and (16-14) IDs and versions are respectively transmitted to the center apparatus 200 (S403), these IDs and versions are received by the communication unit 201 of the center apparatus 200 (S404). ), The following operation is performed under the control of the control unit 204.

  That is, first, if the received version of the map unit is 0 (S405), the ID of the map unit is directly registered in the return list (S406). In the case of FIG. 2, the map units (15-12), (16-12), (16-13), and (16-14) are all assumed to be 0, so the map unit (15- 12), (16-12), (16-13), and (16-14) IDs are directly registered in the return list.

  If the received version of the map unit is not 0 (S407), the map unit ID is compared with the version of the map unit stored in the version management unit 403 for each map unit ID (S408). In the case of FIG. 2, since the version of the map units (14-12), (14-13), (14-14), (15-13), (15-14) is not 0, these map units ( 14-12), (14-13), (14-14), (15-13), and (15-14) are compared with the version of the map unit stored in the version management unit 403.

  As a result of comparison, if the received version of the map unit is older (S409), the map unit ID is registered in the return list (S405). If the received version of the map unit is the same as the version stored in the version management unit 403 (S410), the map unit is left as it is and is not registered in the return list (S411).

In FIG. 2, all the versions of the map units (14-12), (14-13), (14-14), (15-13), and (15-14) that the terminal device 100 already holds are “
8 ”, if the version of the map unit stored in the version management unit 403 is as shown in FIG. 3, the map unit version (14-12) and (14-13) received the version of the map unit received. The map unit (14-12), (14-13) ID is registered in the return list, and the map units (14-14), (15-13), (15-14) Since the received version of the map unit is the same as the version stored in the version management unit 403, it is left as it is and is not registered in the return list.

  In this way, after all, only the IDs of the necessary map units (14-12), (14-13), (15-12), (16-12), (16-13), (16-14) be registered. The IDs of these map units (14-12), (14-13), (15-12), (16-12), (16-13), and (16-14) are registered in the return list. Then, these IDs are extracted from the return list, the map information in the map unit of the ID is read from the storage unit 202, and returned together with the version information to the terminal device 100 via the communication unit 201 (S412). ).

  The terminal device 100 receives map information and version information from the center device 200 (S413), and stores and updates them in the storage unit 104 (S414). Thus, new map information in the traveling direction of the current position can be obtained, and the current position can be correctly displayed on the display unit 103 based on the new map information.

  By the way, in this embodiment, all the map units in the necessary map range are collectively transmitted to the terminal device 100 at a time. However, a desired transmission order is determined in advance in the terminal device 100, and the order is determined. According to the above, it may be transmitted one unit at a time.

  FIG. 5 is a flowchart showing the operation in such a configuration, and this embodiment will be described below.

  The requested map range to be requested is determined from the current position and the traveling direction (S501), all map units including all or part of the range are extracted (S502), and then the desired transmission of the extracted map unit is performed. The order is determined (S503). When determining the transmission order, the representative position, direction, ID, and the like of the extracted map unit may be displayed on the display unit 103, and the transmission order may be manually determined appropriately using the operation unit 102. However, the transmission order desired in advance is automatically set so that, for example, the current position and the direction of travel of the current position directly in the direction of travel are first, and the surroundings are second and third. It may be determined.

  When the transmission order is determined in this way (S503), the determined transmission order is transmitted to the center apparatus 200 through the communication unit 105 together with the extracted map unit ID and version (S504).

  The center device 200 receives the transmitted map unit ID, version, and transmission order, and based on the received map unit, determines the map unit to be transmitted to the terminal device 100 in the same manner as in the previous embodiment. The map unit ID is registered in the transmission list (S505). And the map unit of registered ID is extracted from the memory | storage part 202, and the map information and version of the map unit are transmitted to the terminal device 100 for every map unit according to a desired transmission order (S506).

When a communication error or the like occurs during transmission, the control unit 204 detects this, and again includes the map unit in which the communication error has occurred, and then transmits subsequent map units via the communication unit 201 for each map unit. To the terminal device 100 (S507).

  The terminal device 100 receives the map unit from the center device 200 for each unit (S508), and stores and updates the map unit in order from the received map unit (S509). Therefore, according to this embodiment, the map units in the necessary map range can be obtained and stored and updated for each map unit in the desired order, and can be used and utilized at an early stage for each obtained map unit. it can.

  In the above embodiment, the map device ID and version required from the terminal device 100 are transmitted to the center device 200, and the center device 200 compares the map unit version with the map unit version held by the center device 200. When the version of the map unit possessed by the device 200 is a new version, the map unit of that version is automatically transmitted to the terminal device 100. From the terminal device 100, the necessary map unit is transmitted. Only the ID of the map unit is transmitted, the version of the map unit of that ID is obtained from the center apparatus 200, and the terminal apparatus 100 compares it with the version of the map unit held by the terminal apparatus 100, and only the necessary map unit is stored in the center apparatus 200. You may make it request.

  FIG. 6 is a flowchart showing the operation in such a configuration, and this embodiment will be described below.

  A requested map range to be requested is determined from the current position and its traveling direction (S601), and all map units including all or part of the range are extracted (S602). Then, the ID of the extracted map unit is transmitted to the center apparatus 200 through the communication unit 105 (S603).

  The center device 200 receives the ID of the transmitted map unit (S604), and based on this, extracts the version of the map unit with that ID (S605), and the communication unit 201 extracts the extracted version together with the ID of the map unit. Is transmitted to the terminal device 100 (S606).

  In the terminal device 100, the ID and version of the map unit transmitted from the center device 200 are received (S607), the received version is compared with the version held in the terminal device 100 for each ID, and the result is compared with the control unit. The information is displayed on the display unit 103 under the control of 106 (608).

  The version displayed on the display unit 103 is confirmed, a required version of the map unit is selected based on the operation of the operation unit 102, and the ID of the required map unit is transmitted to the center device 200 (S609).

  The center device 200 receives the ID of the map unit transmitted from the terminal device 100 (S610), extracts the map information and the version in the map unit of the received ID, and transmits them to the terminal device 100 (S611). The terminal device 100 receives the map information and version of the map unit from the center device, and stores and updates it in the storage unit 104 (S612). Therefore, according to this embodiment, it is possible to obtain only the truly necessary map units that are selected by the operation unit.

As described above, since the map distribution system of the present invention can effectively obtain and update only the map information of the map unit whose version is new, the map distribution system receives the map distribution, displays the current position, The present invention can be effectively applied to a navigation device that guides a route to the ground.

The schematic block diagram of the map delivery system in one embodiment of this invention The figure which shows an example of the map unit used with the map delivery system in one embodiment of this invention The figure which shows ID and version of a map unit used with the map delivery system in one embodiment of this invention The flowchart which shows operation | movement of the map delivery system in one embodiment of this invention. The flowchart which shows operation | movement of the map delivery system in other embodiment of this invention. The flowchart which shows operation | movement of the map delivery system in other embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Terminal device 101 Positioning part 102 Operation part 103 Display part 104 Storage part 105 Communication part 106 Control part 200 Center apparatus 201 Communication part 202 Storage part 203 Version management part 204 Control part

Claims (5)

A map distribution system including a center device and a terminal device communicating with the center device, wherein the terminal device determines a map request range determining means for determining a range of a map requested to the center device, and the map request range Map unit extraction means for extracting all map units covering the map request range determined by the determination means, and transmission means for transmitting the ID and version of the map unit extracted by the map unit extraction means to the center device, respectively. And comprising
The center device receives the map unit ID and version transmitted from the terminal device, and the version is 0 based on the map unit ID and version received by the reception unit, and the version If the version received by the receiving means is older than the version of the map unit having the same ID as the map unit stored in the center device, the map unit ID is returned. Map distribution comprising: registration means for registering in a list; and transmission means for extracting a map unit of an ID registered in the registration means and transmitting map information and version of the extracted map unit to the terminal device, respectively. system. If the version of the received map unit is the same in the center device as compared with the version of the map unit having the same ID as the map unit stored in the center device, the received map unit The map distribution system according to claim 1, further comprising means for leaving the version of the map. The terminal device is provided with transmission order determining means for determining a desired transmission order of the map units extracted by the map unit extracting means, and the transmission means of the terminal measure is determined by the transmission order determining means. Together with the map unit ID and version extracted by the map unit extraction means, respectively, and the transmission means of the center device sends the map information and version in the map unit of the ID registered in the registration means. The map distribution system according to claim 1, wherein each map unit transmits the map unit to the terminal device according to the transmission order. The center device is provided with detection means for detecting a communication error with the terminal device, and when the detection means detects a communication error with the terminal device, the map unit including the map unit having the communication error is subsequently included in the map unit. 4. The map distribution system according to claim 3, wherein the map information and version are transmitted again one by one. A map distribution system including a center device and a terminal device communicating with the center device, wherein the terminal device determines a map request range determining means for determining a range of a map requested to the center device, and the map request range Map unit extracting means for extracting all map units covering the map request range determined by the determining means, and transmitting means for transmitting the ID of the map unit extracted by the map unit extracting means to the center device. Prepared,
The center device receives a map unit ID transmitted from the terminal device, and based on the ID received by the receiving device, transmits a version of the ID in the map unit to the terminal device. Means, and
In the terminal device, based on the version of the map unit received from the center device, the ID of the required map unit is transmitted to the center device, and the map information and version of the required map unit are obtained from the center device. A map distribution system characterized by being configured as described above.

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