JP2005303858A - Mobile communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize the efficient changeover of a communication system in a mobile communication system in which a mobile-communication terminal device 1 and a base station device 2 communicate by a radio. <P>SOLUTION: In the mobile communication terminal device 1, a mobile-information gain means 21 gains an information regarding the speed of the mobile-communication terminal device 1 and the information regarding the direction of the speed, and communication-system changeover-mode decision means 22 and 24 decide the changeover mode of the communication system used by the mobile-communication terminal device 1 on the basis of the information gained by the mobile-information gain means 21. In the mobile-communication terminal device 1, communication-system changeover processing execution means 14 and 16 carry out a processing regarding the changeover of the communication system used by the mobile-communication terminal device 1 on the basis of the result of a decision by the communication-system changeover-mode decision means 22 and 24. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile communication system in which a mobile communication terminal apparatus and a base station apparatus communicate with each other by radio, and in particular, processing related to switching of communication methods based on, for example, information on speed of a mobile communication terminal apparatus and information on a moving direction. It is related with the mobile communication system which implement | achieves efficient switching of a communication system by performing.

Conventionally, when switching the communication method based on the location information of the communication device, for example, a person has determined and manually set, but in this case, it has always been necessary for a person to monitor and determine .
Further, for example, it has been studied to optimize the setting of the communication device at the installation destination. However, in this case, the communication setting cannot be performed while moving.
In addition, for example, there is a technique called handover in a mobile phone system or the like, but this is for stable communication with a fixed antenna, and does not switch the communication method.
Conventionally, for example, it has been studied to select an optimal radio system in software radio (see, for example, Patent Document 1).

JP 2003-101474 A

However, in the conventional mobile communication system, switching of the communication method of the mobile communication terminal device is still insufficient, and further development has been desired.
The present invention has been made in view of such conventional circumstances. For example, the present invention is efficient by executing processing related to switching of communication methods based on information on speed of a mobile communication terminal device and information on a moving direction. It is an object of the present invention to provide a mobile communication system that can realize a common switching of communication methods.

In order to achieve the above object, in the mobile communication system according to the present invention, the following processing is performed in a configuration in which a mobile communication terminal apparatus and a base station apparatus communicate by radio.
That is, the movement information acquisition means acquires information regarding the speed of the mobile communication terminal device and information regarding the direction of the speed. The communication system switching mode determining means determines the switching mode of the communication system used by the mobile communication terminal device based on the information acquired by the mobile information acquisition means. The communication system switching process executing means executes processing related to switching of the communication system used by the mobile communication terminal device based on the determination result by the communication system switching mode determining means.
Therefore, for example, processing relating to switching of communication methods can be executed based on information related to the speed of the mobile communication terminal device, information relating to the moving direction (speed direction), etc., and efficient communication method switching can be realized. Can do.

Below, the structural example regarding this invention is shown further.
Various numbers may be used as the number of communication methods that can be switched and used by the mobile communication terminal device.
Various communication methods may be used as each communication method that can be switched and used by the mobile communication terminal device.
The mobile information acquisition means, for example, as a configuration example expanded compared to the above, information on the position of the mobile communication terminal device, information on the movement direction (speed direction) of the mobile communication terminal device, speed information of the mobile communication terminal device, One or more of information, acceleration information of the mobile communication terminal device, acceleration direction information of the mobile communication terminal device, time information, and the like are acquired. The communication mode switching mode determination unit determines the switching mode of the communication mode used by the mobile communication terminal device based on the information acquired by the mobile information acquisition unit.
In addition, various methods may be used as a method of acquiring various types of information by the movement information acquisition unit, such as a sensor, a global positioning system (GPS), a clock, an arithmetic unit, etc. Can be used.
As the position, moving direction (speed direction), speed, acceleration, acceleration direction, etc., for example, a three-dimensional value, a two-dimensional value, or a one-dimensional value can be used. .

Various modes may be used as a switching mode of the communication method used by the mobile communication terminal device, for example, switching to a communication method determined to be suitable based on information acquired by the mobile information acquisition unit. Aspect etc. are used.
In addition, the communication system switching mode determining means includes, for example, a divided area defining means for defining a plurality of divided areas generated by dividing a space in which the mobile communication terminal device moves into a plurality of areas, and a definition by the divided area defining means. And a divided area specifying means for specifying a divided area (a divided area including the position of the mobile communication terminal apparatus) corresponding to the position information of the mobile communication terminal apparatus acquired by the movement information acquiring means. The communication system switching mode determining means determines the switching mode of the communication system used by the mobile communication terminal device based on the divided area specified by the divided area specifying means.
Various spaces may be used as the space in which the mobile communication terminal device moves, and for example, all or a part of the space on the earth can be used.
Further, various numbers may be used as the number of the plurality of divided regions.
Various areas may be used as the respective divided areas.

Further, the communication system switching mode determination unit includes a determination condition information storage unit that stores information on determination conditions for determining a switching mode of a communication system used by the mobile communication terminal device, for example. The communication system switching mode determining means determines the switching mode of the communication system used by the mobile communication terminal device based on the determination conditions stored in the determination condition information storage means.
In addition, various conditions may be used as the determination method of the communication mode switching mode. For example, when the information defined by each divided region and acquired by the movement information acquisition unit is applied, for example A condition is used so that a communication method (suitable communication method) to be switched to is specified.
The determination condition information storage means can be configured using, for example, a memory that stores information.

Further, as an example, the communication system switching process execution means executes a process of (actually) switching the communication system used by the mobile communication terminal apparatus as a process related to switching of the communication system used by the mobile communication terminal apparatus.
In addition, as another example, the communication method switching process execution unit executes a preparation process for switching the communication method used by the mobile communication terminal device as processing related to switching of the communication method used by the mobile communication terminal device.
In addition, as another example, the communication method switching process execution unit may be a communication method switching candidate used by the mobile communication terminal device by the communication method switching candidate information output unit as processing related to switching of the communication method used by the mobile communication terminal device. Information is output to the user, etc., and in response to this, the communication mode switching instruction input means accepts and inputs an instruction regarding switching of the communication system from the user, etc., and is used by the mobile communication terminal device according to the instruction The process of switching the communication method to be performed (actually) is executed.

Note that various types of information may be used as the information related to the communication method switching candidates. For example, information such as the names and identification numbers of one or more communication methods serving as switching candidates can be used. .
Various modes may be used as a mode for outputting information. For example, a mode for displaying and outputting information on a screen may be used.
Various instructions may be used as instructions for switching communication methods. For example, an instruction for specifying a communication method to be switched may be used.
Various modes may be used as a mode of receiving and inputting an instruction. For example, a mode of receiving and inputting an instruction with a key or a button may be used.

In addition, for example, a communication system switching information output unit that outputs information on switching of a communication system used by the mobile communication terminal device to a user or the like is provided.
Note that various types of information may be used as the information related to the switching of the communication method. For example, information such as the name and identification number of the communication method to be switched or already switched can be used.
In addition, each functional unit as described above may be provided in, for example, a mobile communication terminal device, may be provided in a base station device, or may be provided in another device. .
Further, the present invention can be applied to various communication systems such as a mobile phone system and a simple mobile phone system (PHS: Personal Handy phone System).
In addition, for example, the same technology as the present invention can be applied to a communication system other than a mobile communication system, such as a communication system in which a communication terminal apparatus that does not normally move and a base station apparatus communicate with each other wirelessly. is there.

  As described above, according to the mobile communication system of the present invention, in a configuration in which a mobile communication terminal device and a base station device communicate wirelessly, information on the speed of the mobile communication terminal device and information on the direction of the speed are acquired. Then, the switching mode of the communication method used by the mobile communication terminal device is determined based on the acquired information, and the process related to the switching of the communication method used by the mobile communication terminal device is executed based on the determination result. Therefore, efficient switching of communication methods can be realized.

Embodiments according to the present invention will be described with reference to the drawings.
FIG. 1A shows a configuration example of a mobile communication system according to an embodiment of the present invention.
The mobile communication system of this example includes a mobile communication terminal device 1 and a base station device 2.
The mobile communication system of this example includes a plurality of mobile communication terminal devices and a plurality of base station devices. In this example, one mobile communication terminal device 1 and one base station device 2 are shown. I will explain.
In addition, the mobile communication system of this example includes other devices (devices other than mobile communication terminal devices and base station devices) such as a radio relay amplification device and a line control device. And the explanation is omitted.

FIG. 1B shows a configuration example of the mobile communication terminal device 1 of this example.
The mobile communication terminal device 1 of this example includes an antenna 11, a wireless communication unit 12, a communication method determination unit 13, a communication method switching unit 14, a presentation unit 15, and an input unit 16. In addition, the communication method determination unit 13 includes a movement information acquisition unit 21, a control area setting unit 22, a determination condition storage unit 23, and a determination unit 24.
The antenna 11 transmits and receives radio signals.
The wireless communication unit 12 performs wireless communication with the antenna 11 using a communication method that can be switched from among a plurality of communication methods by the communication method switching unit 14.
The communication method determination unit 13 determines a communication method used for wireless communication.
The movement information acquisition unit 21 acquires information (movement information) related to the position, speed, acceleration, movement direction, and the like of the mobile communication terminal device 1.
For example, the control area setting unit 22 sets the control area based on the movement information acquired by the movement information acquisition unit 21.
The determination condition storage unit 23 stores, for example, a condition (determination condition) for determining (determining) a communication method used for wireless communication according to the control area.
For example, the determination unit 24 performs wireless communication based on the movement information acquired by the movement information acquisition unit 21, the control region set by the control region setting unit 22, and the determination condition stored by the determination condition storage unit 23. Determine (determine) the communication method to be used.
The communication method switching unit 14 switches the communication method determined by the communication method determination unit 13 from among a plurality of communication methods so that it is used for wireless communication by the wireless communication unit 12.

Here, in this example, when a communication method is determined by the communication method determination unit 13, a case is shown in which processing for switching to the determined communication method is performed by the communication method switching unit 14, but as another example, a communication method determination unit It is also possible to perform a process of switching the communication method in accordance with an instruction from the user after the communication method determined by 13 is presented to the user as a communication method candidate.
Specifically, the presenting unit 15 presents information specifying one or more communication methods determined by the communication method determining unit 13 to a user or the like as a communication method candidate through screen display or the like. As information for specifying the communication method, for example, the name or identification number of the communication method can be used.
The input unit 16 includes, for example, a key, a button, and the like, and receives and inputs an operation for instructing a communication method used for wireless communication from a user or the like.
In this case, the communication method switching unit 14 switches the instructed communication method to be used for wireless communication by the wireless communication unit 12 based on the instruction input by the input unit 16.
In addition, the presenting unit 15 can present, for example, information for specifying a communication method to be switched or a communication method that has already been switched.

In this example, for example, the movement information acquisition unit 21, the control region setting unit 22, the determination condition storage unit 23, the determination unit 24, and the presentation unit which are functional units for switching the communication method used by the mobile communication terminal device 1. 15 and the input unit 16 are shown as an example of a configuration provided in the mobile communication terminal device 1, but a configuration in which a part or all of such functional units are provided in another device such as the base station device 2 is adopted. It is also possible.
In addition, communication of a plurality of communication schemes that are switched and used by the mobile communication terminal device 1 may be realized by, for example, one base station device (base station device 2 in this example) or a plurality of different communication methods. Communication of different communication methods may be realized by the base station apparatus. Specifically, for example, a mode in which one base station apparatus manages the communication scheme of the mobile communication terminal apparatus 1 and communicates with the mobile communication terminal apparatus 1 by various communication schemes, or a plurality A mode in which a base station device corresponding to a communication method currently used by the mobile communication terminal device 1 among the base station devices manages the mobile communication terminal device 1 and communicates with the mobile communication terminal device 1 Can be used.

First, the outline of the communication system switching process performed by the mobile communication terminal device 1 of this example will be described.
That is, first, a three-dimensional space region and a communication method used in the region and a conditional expression for switching the communication method are defined, and information such as current and past position and time is acquired, and the defined condition Use the formula to determine the switching of the communication method.
Thus, for example, the communication method can be automatically switched while moving in a three-dimensional space, or the communication method can be switched at a high speed by predicting the future communication method switching based on information such as moving speed and acceleration. In addition, it is possible to perform smoothly.

Examples (1) to (7) of the procedure of the communication system switching process performed by the mobile communication terminal device 1 of this example are shown. Note that (1) to (2) are preparation procedures, and are performed by a user, for example. Further, (3) to (7) are procedures in operation, and are automatically performed by the mobile communication terminal device 1, for example.
(1) Define a “control region” to which a communication method and a switching condition equation are applied. In this example, a switching conditional expression is used as a determination condition.
(2) For each control area, a switching condition formula and a communication method to be switched are defined.
(3) The current position and time information of the mobile communication terminal device 1 are acquired by a sensor or the like.
(4) Search for a control area applicable to the current position, etc., and read the switching conditional expression.
(5) The information obtained by the sensor or the like is substituted into the switching conditional expression.
(6) The communication method to be switched is determined from the calculation result by the switching conditional expression.
(7) Switch the communication method to the determined communication method.

Here, the communication system switching process of this example mainly includes processes such as (A) setting of a control area, (B) definition of a switching conditional expression, and (C) determination of switching of a communication system.
Examples of (A) control region setting processing include (A-1) block method processing, (A-2) polyhedron definition method processing, and (C) surface surrounding condition method processing.
(B) As a definition process of the switching condition formula, (B-1) a definition process based on a time condition, (B-2) a definition process based on a position condition, (B-3) a definition process based on a speed condition, and (B -4) Definition processing based on acceleration conditions and (B-5) definition processing based on combinations of switching conditional expressions (for example, combinations of two or more of the four).
(C) In the communication system switching determination process, for example, the current state (current state) of the mobile communication terminal device 1 is digitized, and the communication system switching is determined from the calculation result of the control area and the switching conditional expression.

Next, specific examples (A-1) to (A-3) of (A) control area setting processing will be described.
Each of (A-1) to (A-3) may be used alone, or two or more may be used in combination.
(A-1) A control area setting process by the block method will be described.
In this example, as shown in FIGS. 2A and 2B, the space on the earth A is divided into a plurality of regions (blocks) B1 and B2 to define control regions.
FIG. 2A shows an example of the shape of the block viewed from the sky of the earth A, and only one block B1 of the plurality of blocks is denoted by “B1”.
FIG. 2B shows an example of the shape of the block as seen in the cross section of the earth A, and only the block B2 of the plurality of blocks is denoted by the symbol “B2”.

Here, the blocks B1 and B2 used as the control region have the following characteristics in this example.
That is, all the blocks B1 and B2 have substantially the same shape and have almost the same volume. Each of the blocks B1 and B2 is sufficiently small (for example, as a whole). Each of the blocks B1 and B2 has a shape obtained by cutting out a hexagonal pyramid with a spherical surface. In this example, each of the blocks B1 and B2 is small enough to actually have a shape close to a hexagonal column. In each of the blocks B1 and B2, the height and the length of the bottom diagonal line are the same. The number of levels of the blocks B1 and B2 is innumerable (or a large number corresponding to a predetermined upper limit value). Each of the blocks B1 and B2 is determined by an absolute position, and is managed with a unique symbol or name.

An example of a schematic program format for realizing the system of this example will be shown.
(Example of block format)
<Control Area Definition Name = “Z”> // Define a control area named “Z”.
<Block definition> // Start definition in block format.
(111111,000,000,000 to 999999), (111111,000001, ??????), ...
</ Block definition> // Define in the block method.
// Control area definition // End the definition of the control area.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. The numeral portion is for indicating block information (for example, block number), “˜” is a symbol indicating continuity, “,” is a delimiter, and “?” Is 0-9. Enter the number.
The block information is composed of longitude, latitude, and altitude information. In this example, 6 digits out of 18 digits are assigned as latitude, longitude and altitude information.
In the above example, (111111,000,000,000 to 999999) is information that specifies latitude is “111111”, information that specifies longitude is “000000”, and information that specifies altitude is “000000 to 999999”. ". Here, the altitude information is continuously specified from “000000” to “999999”.
In the above example, (111111, 000001, ??????) indicates that the information specifying the latitude is “111111”, the information specifying the longitude is “000001”, and the information specifying the altitude. Is "?????????".

For example, examples (1) to (3) of a method for obtaining information (for example, a block number) specifying a block to which a certain position belongs, such as a position where the mobile communication terminal device 1 exists, are shown.
(1) The latitude portion of the block number is determined from the current latitude and latitude / block number management table.
(2) The longitude part of the block number is determined from the current longitude and longitude / block number management table.
(3) The altitude portion of the block number is determined from the current altitude and altitude / block number management table.
From the above (1) to (3), all block numbers are obtained, and a block to which a certain position belongs is obtained.

Here, in the latitude / block number management table, for example, a correspondence between a latitude range having a width and a block number of latitude is set.
In the longitude / block number management table, for example, correspondence between a range of longitude having a width and a block number of longitude is set.
In the altitude / block number management table, for example, a correspondence between a range of altitude having a width and an altitude block number is set.
FIG. 3 shows an example of a block number management table related to altitude (altitude / block number management table) as an example of a block number management table.
In the example of FIG. 3, altitude information in the range of “150 to 151” (m) is associated with the altitude block number “001082”.
In the mobile communication terminal device 1 of this example, for example, the mobile information acquisition unit 21 acquires information on the position of the mobile communication terminal device 1, and the control region setting unit 22 has a latitude / block number management table or a longitude / block number management table. The altitude / block number management table is stored, and the control area (block) is specified and set based on the acquired position information and the setting contents of these tables.

(A-2) Control region setting processing by the polyhedron definition method will be described.
In this example, the control area is defined by a polyhedron.
As information for defining a polyhedron, information on coordinates of internal points, information on coordinates of vertices, and information on surfaces defined by three or more vertices are used.
FIG. 4 shows an example in which the tetrahedron C is defined as a control region as an example of a polyhedron.
An example of a schematic program format for realizing the system of this example will be shown.
(An example of the format by the polyhedron definition method)
<Control Area Definition Name = “Z”> // Define a control area named “Z”.
<Polyhedron definition> // Define in the polyhedron definition method.
<Internal point> (x0, y0, z0) </ Internal point> // Define the coordinates of the internal point.
<Vertex no = “1”> (x1, y1, z1) </ vertex> // Define the coordinates of vertex 1.
<Vertex no = “2”> (x2, y2, z2) </ vertex> // Define the coordinates of vertex 2.
<Vertex no = “3”> (x3, y3, z3) </ vertex> // Define the coordinates of the vertex 3.
<Vertex no = “4”> (x4, y4, z4) </ vertex> // Define the coordinates of the vertex 4.
<Surface no = “1”> (Vertex 1, Vertex 2, Vertex 4) </ Surface> // The surface 1 constituting the polyhedron is defined by a vertex.
<Surface no = “2”> (Vertex 1, Vertex 3, Vertex 4) </ Surface> // The surface 2 constituting the polyhedron is defined by vertices.
<Surface no = “3”> (Vertex 2, Vertex 3, Vertex 4) </ Surface> // The surface 3 constituting the polyhedron is defined by vertices.
<Surface no = “4”> (Vertex 1, Vertex 2, Vertex 3) </ Surface> // The surface 4 constituting the polyhedron is defined by vertices.
// Polyhedron definition // End the definition in the polyhedron definition method.
// Control area definition // End the definition of the control area.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. “,” Is a delimiter.
In addition, it is assumed that the control region defined by this method is a convex polyhedron. When defining a concave polyhedron, a plurality of convex polyhedron definitions are used instead.
In the above example, the coordinates (x0, y0, z0) of the points inside the tetrahedron C constituting the control region, the coordinates (x1, y1, z1) of the vertex 1, and the coordinates (x2, y2, z2) of the vertex 2 , Vertex 3 coordinates (x3, y3, z3), vertex 4 coordinates (x4, y4, z4), vertex constituting surface 1 (vertex 1, vertex 2, vertex 4), vertex constituting surface 2 (vertex) 1, vertex 3, vertex 4), vertex 3 constituting surface 3 (vertex 2, vertex 3, vertex 4), and vertex constituting vertex 4 (vertex 1, vertex 2, vertex 3) define tetrahedron C The

For example, an example of a method for obtaining information (for example, a block number) specifying a block to which a certain position belongs, such as a position where the mobile communication terminal device 1 exists, will be described.
That is, in this example, whether or not a certain position is within the target control area is determined by examining whether or not the position is on the same side as the internal point with respect to all the faces of the target control area. If it is determined that the position is on the same side as the internal point with respect to all the faces of the target control area, it is determined that the position is within the control area. In such a determination, for example, the calculation amount can be reduced by calculating from a control region having an internal point closest to a certain position.
In the mobile communication terminal device 1 of this example, for example, the movement information acquisition unit 21 acquires information on the position of the mobile communication terminal device 1, and the control region setting unit 22 has a plurality of control regions (blocks) defined by a polyhedron. Information is stored and a control region including the acquired position is specified and set.

(A-3) Control area setting processing by the surface surrounding condition method will be described.
In this example, one or more mathematical expressions such as a plane, a curved surface, and a spherical surface are defined, and a space surrounded by each surface is defined as a control region.
FIG. 5 shows an example of the control area surrounded by the spherical surface D and the plane E as an example of such a control area.
An example of a schematic program format for realizing the system of this example will be shown.
(An example of the format by the surface surrounding condition method)
<Control Area Definition Name = “Z”> // Define a control area named “Z”.
<Definition of surface surrounding conditions> // Start definition using the surface surrounding condition method.
<Internal point> (x0, y0, z0) </ Internal point> // Define the coordinates of the internal point.
<Surface condition> // A space is defined by a logical expression describing a surface by an equation.
{Ax + by + cz + d = 0} & {(x−e) ² + (y−f) ² + (z−g) ² = r ² }
</ Surface condition> // End the description of the surface.
</ Definition of surface surrounding conditions> // End the definition in the surface surrounding condition method.
// Control area definition // End the definition of the control area.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. “,” Is a delimiter.
In the above example, the coordinates (x0, y0, z0) of the points inside the control region, the mathematical expression {ax + by + cz + d = 0} representing the plane, and the mathematical expression {(x−e) ² + (y−f) ² + representing the spherical surface. By (z−g) ² = r ² , a region surrounded by the plane and the spherical surface is defined as a control region.
For example, an example of a method for obtaining information (for example, a block number) specifying a block to which a certain position belongs, such as a position where the mobile communication terminal device 1 exists, will be described.
That is, in this example, whether or not a certain position is within the target control area is determined by examining whether or not the position is on the same side as the internal point with respect to all the faces of the target control area. If it is determined that the position is on the same side as the internal point with respect to all the faces of the target control area, it is determined that the position is within the control area. In such a determination, for example, the calculation amount can be reduced by calculating from a control region having an internal point closest to a certain position.
In the mobile communication terminal device 1 of this example, for example, the movement information acquisition unit 21 acquires information on the position of the mobile communication terminal device 1, and the control region setting unit 22 has a plurality of control regions each defined by two or more surfaces. (Block) information is stored and a control region including the acquired position is specified and set.

Next, specific examples (B-1) to (B-5) of the definition process of (B) switching conditional expression are shown.
Each of (B-1) to (B-4) may be used alone, or two or more may be used in combination as in (B-5).
In addition, information such as the position P, the speed V, and the acceleration A of the mobile communication terminal device 1 is obtained in advance before the switching conditional expression is evaluated, for example, based on sensor information.
(B-1) The switching condition definition process based on the time condition will be described.
In this example, the setting in a certain control area is designated by time. Inequalities and logical operators are used for the definition.
As an example, an example of a schematic program format for defining the switching condition of this example for the case of specifying 8:00 to 10:00 every day and 14:00 to 15:00 on January 1, 2004 Indicates.
(Example format according to time conditions)
<In control area = “Z”> // When currently in the control area Z.
<Condition> // Proceed to the process below if the condition is satisfied, and terminate <Condition> if the condition is not satisfied.
<Time condition> // Describe the time condition.
{? ? ? ? 0800 ~? ? ? ? 1000} | {20040101140 to 20040101500}
// Time condition // End the description of the time condition.
<Communication method> Communication method Y </ Communication method> // Switch the communication method to "Y".
</ Condition> // End the condition.
<Default> // If there is nothing that satisfies the conditional expression, do the following.
<Communication method> Communication method X </ Communication method> // Switch the communication method to "X".
</ Default> // End the default process.
</ In> // End the definition of the switching condition.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. “˜” is a symbol indicating continuity, and “,” is a delimiter. “|” Represents an OR condition. Further, for example, it is possible to indicate the priority order of logical expressions using the symbol “()”.
In the above example, {? ? ? ? 0800 ~? ? ? ? 1000} represents 8:00 to 10:00 every day, {20040101140 to 20040110500} represents 14:00 on January 1, 2004, 14:00 to 15:00, and the mobile communication terminal device 1 is located within a certain control area Z. When it exists, if it is in one of these time zones, it switches to the communication method Y, and in other cases, it switches to the communication method X (or keeps the currently set communication method X).
In the mobile communication terminal device 1 of this example, for example, the determination condition storage unit 23 stores switching conditions based on time conditions, and the determination unit 24 acquires the movement information acquired by the movement information acquisition unit 21 and the control region setting unit 22. The communication method is determined and determined based on the control region set in step S1 and the determination condition stored in the determination condition storage unit 23, and the communication method switching unit 14 switches to the determined communication method.

(B-2) Switching condition definition processing based on position conditions will be described.
In this example, a command to be executed when the mobile communication terminal device 1 is at a certain position is described. Moreover, it is determined to which control area the mobile communication terminal apparatus 1 belongs by using the methods as shown in the above (A-1) to (A-3).
An example of a schematic program format for defining the switching condition of this example is shown.
(Example of format based on position conditions)
<In control area = “Z1”> // When currently in the control area Z1.
[Describe here what to do when in control area Z]
</ In> // End the definition of the switching condition.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation.
In the above example, when the mobile communication terminal device 1 is present in the predetermined control area Z1, the processing of the described contents is executed, for example, switching to a predetermined communication method is performed.
In the mobile communication terminal device 1 of this example, for example, the determination condition storage unit 23 stores the switching condition based on the position condition, and the determination unit 24 acquires the movement information acquired by the movement information acquisition unit 21 and the control region setting unit 22. The communication method is determined and determined based on the control region set in step S1 and the determination condition stored in the determination condition storage unit 23, and the communication method switching unit 14 switches to the determined communication method.

(B-3) Switching condition definition processing based on speed conditions will be described.
In this example, the speed of the mobile communication terminal device 1 is determined by differentiating the position of the mobile communication terminal device 1 with respect to time. Further, for example, it is possible to calculate the current speed and its direction by using the current position and time information and the past position and time information sufficiently close to the current time.
An example of a schematic program format for defining the switching condition of this example is shown.
(Example of format based on speed conditions)
<In control area = “Z”> // When currently in the control area Z.
<Condition> // If the condition is satisfied, the process proceeds to the following process, and if not satisfied, the condition is terminated.
<Conditional expression> // Describe the conditional expression.
(Vabs >> = 10) & (Vabs << = 20) | (Vabs = 20-25) /// Speed conditions are defined.
| (Velem (x ² + y ² = 10)) // Defines a condition that the velocity direction component is directed to a surface in parentheses.
| (Vdirec ((10,10,10), (0,10,10), (10,10,0))) // Defines a condition that the velocity direction component is directed to the surface in parentheses.
| (Vregion (W)) // Defines when the velocity direction component goes to the control region in parentheses.
// Conditional expression // Define the description of the conditional expression.
<Communication method> Communication method Y </ Communication method> // Switch the communication method to "Y".
</ Condition> // End the condition.
<Default> // If there is nothing that satisfies the conditional expression, do the following.
<Communication method> Communication method X </ Communication method> // Switch the communication method to "X".
</ Default> // End the default process.
</ In> // End the definition of the switching condition.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. “˜” is a symbol indicating continuity, and “,” is a delimiter. “|” Represents an OR condition. Further, for example, it is possible to indicate the priority order of logical expressions using the symbol “()”. In this example, in order to distinguish between a tag and an inequality, two symbols such as “>>” and “<<” are used consecutively as the inequality.
Vabs represents the absolute value of the speed, and the speed direction component includes a speed Vx in the x-axis direction, a speed Vy in the y-axis direction, and a speed Vz in the z-axis direction.
In the above example, when the mobile communication terminal device 1 exists in a certain control area Z, the absolute value Vabs of the speed is 10 or more and 20 or less, or the absolute value of the speed Vabs is 20 to 25. If it is a value, or if the velocity direction component goes to a plane defined by (x ² + y ² = 10), or if the velocity direction component is three points ((10, 10, 10), (0, 10, 10) , (10, 10, 0)), or when the speed direction component goes to the predetermined control region W, switch to communication method Y, otherwise switch to communication method X. (Alternatively, the communication method X that is currently set is maintained).

In the conditional expression as in this example, for example, when the speed of the mobile communication terminal device 1 is increased, switching to a communication method capable of communication even at high speed movement, or the next control region in which the mobile communication terminal device 1 proceeds is set. It is possible to predict and prepare for setting the communication method.
In the mobile communication terminal device 1 of this example, for example, the determination condition storage unit 23 stores the switching condition based on the speed condition, and the determination unit 24 acquires the movement information acquired by the movement information acquisition unit 21 and the control area setting unit 22. The communication method is determined and determined based on the control region set in step S1 and the determination condition stored in the determination condition storage unit 23, and the communication method switching unit 14 switches to the determined communication method.

(B-4) Switching condition definition processing based on acceleration conditions will be described.
In this example, the acceleration of the mobile communication terminal device 1 is determined by differentiating the speed of the mobile communication terminal device 1 with respect to time. Also, for example, the current acceleration and its direction can be calculated using information on the current speed and time and information on past speed and time sufficiently close to the present.
An example of a schematic program format for defining the switching condition of this example is shown.
(Example of format based on acceleration conditions)
<In control area = “Z”> // When currently in the control area Z.
<Condition> // If the condition is satisfied, the process proceeds to the following process, and if not satisfied, the condition is terminated.
<Conditional expression> // Describe the conditional expression.
(Aabs >> = 10) & (Aabs << = 20) | (Aabs = 20-25) /// Acceleration conditions are defined.
// Conditional expression // Define the description of the conditional expression.
<Communication method> Communication method Y </ Communication method> // Switch the communication method to "Y".
</ Condition> // End the condition.
<Default> // If there is nothing that satisfies the conditional expression, do the following.
<Communication method> Communication method X </ Communication method> // Switch the communication method to "X".
</ Default> // End the default process.
</ In> // End the definition of the switching condition.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. “˜” is a symbol indicating continuity. “|” Represents an OR condition. Further, for example, it is possible to indicate the priority order of logical expressions using the symbol “()”. In this example, in order to distinguish between a tag and an inequality, two symbols such as “>>” and “<<” are used consecutively as the inequality.
Aabs represents an absolute value of acceleration, and acceleration direction components include acceleration Ax in the x-axis direction, acceleration Ay in the y-axis direction, and acceleration Az in the z-axis direction.
In the above example, when the mobile communication terminal device 1 exists in a certain control area Z, the absolute value Aabs of acceleration is 10 or more and 20 or less, or the absolute value of acceleration Aabs is 20 to 25. If the value is a value, the communication method is switched to Y. In other cases, the communication method is switched to X (or the communication method X that is currently set is kept).

In the conditional expression as in this example, for example, it is possible to prepare for switching between communication methods by predicting an increase or decrease in the speed of the mobile communication terminal device 1.
In the mobile communication terminal device 1 of this example, for example, the determination condition storage unit 23 stores the switching condition based on the acceleration condition, and the determination unit 24 acquires the movement information acquired by the movement information acquisition unit 21 and the control region setting unit 22. The communication method is determined and determined based on the control region set in step S1 and the determination condition stored in the determination condition storage unit 23, and the communication method switching unit 14 switches to the determined communication method.

(B-5) A definition process based on a combination of switching conditional expressions will be described.
In this example, for example, two or more conditions as shown in (B-1) to (B-4) described above are used as one set.
Specific examples (B-5-1) to (B-5-3) of the switching conditional expression of this example are shown.
(B-5-1) A first combination example is shown.
In this example, when the speed of the mobile communication terminal device 1 is equal to or higher than a predetermined speed within the predetermined control area Z, the communication method is switched. For example, if the current communication method cannot be used at a certain speed or higher, it is possible to switch to another communication method.
An example of a schematic program format for defining the switching condition of this example is shown.
(Example of format according to the conditions of the first combination example)
<In control area = “Z1”> // When currently in the control area Z1.
<Condition> // If the condition is satisfied, the process proceeds to the following process, and if not satisfied, the condition is terminated.
<Conditional Expression> V >> 10 </ Conditional Expression> // If the speed is larger than 10, proceed to the following process.
<Communication method> Communication method Y </ Communication method> // Switch the communication method to "Y".
</ Condition> // End the condition.
<Default> // If there is nothing that satisfies the conditional expression, do the following.
<Communication method> Communication method X </ Communication method> // Switch the communication method to "X".
</ Default> // End the default process.
</ In> // End the definition of the switching condition.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. Further, for example, it is possible to indicate the priority order of logical expressions using the symbol “()”. In this example, in order to distinguish between a tag and an inequality, two symbols such as “>>” and “<<” are used consecutively as the inequality.
V represents speed.
In the above example, when the mobile communication terminal device 1 exists in the predetermined control area Z1, if the speed V is higher than 10, the communication method Y is switched, and in other cases, the communication method X is switched ( Alternatively, the currently set communication method X is used).
In the mobile communication terminal device 1 of the present example, for example, the determination condition storage unit 23 stores the switching condition based on the conditions of the first combination example, and the determination unit 24 acquires the movement information acquired by the movement information acquisition unit 21. The communication method is determined and determined based on the control region set by the control region setting unit 22 and the determination condition stored in the determination condition storage unit 23, and the communication method switching unit 14 switches to the determined communication method.

(B-5-2) A second combination example is shown.
In this example, when the mobile communication terminal device 1 enters the next control area by movement, prediction is performed in order to quickly switch the communication method.
For example, the current position P of the mobile communication terminal device 1 is in the control region Z1, the mobile communication terminal device 1 is currently moving toward another control region Z2 at a speed Vabs, and the communication method used in the control region Z2 is communication. In the case of the system C, it takes a predetermined time Tsw to switch the current communication system to the communication system C, and when the distance from the current position P to the next control area Z2 is D, the predetermined condition “ If D = << Vabs × Tsw is established, it is possible to start preparation for switching the communication method. For example, when the mobile communication terminal device 1 switches and uses a number of channels to perform radio communication. It is possible to prepare for switching to another channel to be communicated next.

An example of a schematic program format for defining the switching condition of this example is shown.
(Example of format according to conditions of the second combination example)
<Variable definition> // Start variable definition.
Tsw: Tswitch (comtype (Rnearon (P, direction (V)))); D: distance (P, Rnearon (P, direction (V))) // Tsw and D are defined.
</ Variable definition> // End variable definition.
<In control area = “Z1”> // When currently in the control area Z1.
<Condition inthis> // If the condition is satisfied, the process proceeds to the following process, and if not satisfied, the condition is terminated.
<Conditional Expression> (D = << (Vabs × Tsw)) </ Conditional Expression> // A conditional expression is defined for the distance to the next region.
<Communication method> comtype (Rnearon (P, direction (V))) </ communication method> // Switch the communication method to the communication method used in the next area.
</ Condition> // End the condition.
<Default> // If there is nothing that satisfies the conditional expression, do the following.
<Communication method> Communication method X </ Communication method> // Switch the communication method to "X".
</ Default> // End the default process.
</ In> // End the definition of the switching condition.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. Further, for example, it is possible to indicate the priority order of logical expressions using the symbol “()”. In this example, in order to distinguish between a tag and an inequality, two symbols such as “>>” and “<<” are used consecutively as the inequality.
Further, in this example, the “inthis” condition represents a condition in the control area, and is out of condition when “commtype” (communication method of another control area) is used. It becomes.
Further, P represents the current position of the mobile communication terminal apparatus 1, Vabs represents the absolute value of the current speed of the mobile communication terminal apparatus 1, and Tswitch (*) is the time required for switching to the communication system *. Commtype (*) represents the communication method under the current conditions in the control area *, and Rnearon (* 1, * 2) represents the closest control area from the position * 1 to the direction * 2. Direction (*) represents the direction of current direction at speed * (or acceleration *), and distance (* 1, * 2) represents the distance from position * 1 to control area * 2. ing.

In the above example, the mobile communication terminal device 1 exists in a certain control area Z1, and the distance to the next control area Z2 to move is ((absolute value of current speed) × (in the next control area Z2). The time required for switching to the communication method Y to be used))) or less, the switching to the communication method Y to be used in the next control area Z2 is started, and in other cases, switching to the communication method X ( Alternatively, the currently set communication method X is used).
In the mobile communication terminal device 1 of the present example, for example, the determination condition storage unit 23 stores the switching condition according to the conditions of the second combination example, and the determination unit 24 acquires the movement information acquired by the movement information acquisition unit 21. The communication method is determined and determined based on the control region set by the control region setting unit 22 and the determination condition stored in the determination condition storage unit 23, and the communication method switching unit 14 switches to the determined communication method.

(B-5-3) A third combination example will be shown.
In this example, when it is necessary to switch the communication method when the speed of the mobile communication terminal device 1 becomes a predetermined speed or more, in order to quickly switch the communication method, the calculation is performed from the acceleration and the required switching time, and the switching is performed. Start preparation.
An example of a schematic program format for defining the switching condition of this example is shown.
(Example of format according to conditions of the third combination example)
<Variable definition> // Start variable definition.
Tsw: Tswitch (communication method Y) // Tsw is defined.
</ Variable definition> // End variable definition.
<In control area = “Z”> // When currently in the control area Z.
<Condition inthis> // If the condition is satisfied, the process proceeds to the following process, and if not satisfied, the condition is terminated.
<Conditional Formula> (Vthr = << Vabs + (Aabs × Tsw)) </ Conditional Formula> // Define a conditional formula for speed.
<Communication method> Communication method Y </ Communication method> // Switch the communication method to "Y".
</ Condition> // End the condition.
<Default> // If there is nothing that satisfies the conditional expression, do the following.
<Communication method> Communication method X </ Communication method> // Switch the communication method to "X".
</ Default> // End the default process.
</ In> // End the definition of the switching condition.

Here, the character string from “//” to the end of the line in the conditional expression is ignored as a comment during evaluation. Further, for example, it is possible to indicate the priority order of logical expressions using the symbol “()”. In this example, in order to distinguish between a tag and an inequality, two symbols such as “>>” and “<<” are used consecutively as the inequality.
Further, in this example, the “inthis” condition represents a condition in the control area, and is out of condition when “commtype” (communication method of another control area) is used. It becomes.
Vabs represents the absolute value of the current speed of the mobile communication terminal device 1, Aabs represents the absolute value of the current acceleration of the mobile communication terminal device 1, and Tswitch (*) is used for switching to the communication method *. It shows the time required.

In the above example, the mobile communication terminal device 1 exists in a certain control area Z1, and ((absolute value of current speed) + (absolute value of current acceleration) × (absolute value of predetermined speed (threshold value)). ) Time required for switching to the communication method Y used at Vthr or higher))) is equal to or greater than the absolute value (threshold value) Vthr of the predetermined speed. Switching to the communication method Y to be used is started, and in other cases, switching to the communication method X is performed (or the communication method X currently set is kept).
In the mobile communication terminal device 1 of this example, for example, the determination condition storage unit 23 stores the switching condition based on the conditions of the third combination example, and the determination unit 24 acquires the movement information acquired by the movement information acquisition unit 21. The communication method is determined and determined based on the control region set by the control region setting unit 22 and the determination condition stored in the determination condition storage unit 23, and the communication method switching unit 14 switches to the determined communication method.

Next, a specific example of (C) communication system switching determination processing will be described.
FIG. 6 shows an example of the procedure of the communication system switching determination process performed by the mobile communication terminal device 1 of this example.
In the mobile communication terminal device 1, first, the movement information acquisition unit 21 acquires the position and time information of the mobile communication terminal device 1 by using, for example, a function of a global positioning system (GPS). Step S1). Further, the movement information acquisition unit 21 calculates information such as speed and acceleration in advance based on the acquired position information and time information (step S2).
Next, in the mobile communication terminal apparatus 1, the control area setting unit 22 reads definition files having information defining the control area (step S3), and the control area to which the position of the mobile communication terminal apparatus 1 belongs is determined. It is determined whether or not it exists (step S4).
As a result, in the mobile communication terminal device 1, when there is a control region to which the position of the mobile communication terminal device 1 belongs, the control region setting unit 22 sets the control region to which the mobile communication terminal device 1 belongs, and the determination unit 24 reads out the switching condition formula corresponding to the control region to which it belongs from the judgment condition setting unit 22, evaluates the switching condition formula in order from the top, for example, and executes the command (step S5).
Also, in the mobile communication terminal device 1, when there is no control region to which the position of the mobile communication terminal device 1 belongs (step S4) or when the switching conditional expression is evaluated as described above (step S5). ), This process ends, and the process proceeds to the movement information acquisition process (step S1) again.

Next, (D) Specific application examples (D-1) to (D-4) of the mobile communication system of this example are shown.
(D-1) The mobile communication terminal device 1 or the function thereof can be used by being mounted on a flying body such as a balloon, an airship, or an airplane.
As an example, it is possible to switch the communication method depending on the region or altitude by using the mobile communication terminal device 1 or its function in an aircraft moving over a wide range.
In addition, the base station device 2 can be used as a “stratosphere platform” communication base station device or an air communication base station device in an emergency such as disaster rescue.
(D-2) The mobile communication terminal device 1 or its function can be used on a ship or the like.
As an example, when operating a wide area such as a boat or tanker for deep sea fishing, the mobile communication terminal device 1 or its function can be used to switch the communication method depending on the region or speed.
(D-3) The mobile communication terminal device 1 or its function can be mounted on a land vehicle or the like.
As an example, the mobile communication terminal device 1 or a function thereof can be mounted on an automobile, a motorcycle, a train, or the like that moves for a long distance, and the communication method can be switched depending on the region or speed.
(D-4) Moreover, it is also possible to implement the installation type communication apparatus which has a function like the mobile communication terminal device 1 of this example.
In this case, in the communication device of the installation type, for example, communication while moving is not performed in principle, and the setting at the installation destination is automated and simplified.
As an example, the communication method used by the communication device can be switched to the optimum communication method at the installation destination of the communication device.

As described above, in the mobile communication system of this example, the mobile communication terminal apparatus 1 is defined with the three-dimensional spatial region and the communication method used in the region and the switching condition expression of the communication method to define the three-dimensional position information. It is possible to make a determination for switching the communication method, switch the communication method, and the like using the time information and the like. In this example, a three-dimensional space region and three-dimensional position information are used. However, for example, a one-dimensional or two-dimensional space region, one-dimensional or two-dimensional position information, and the like can be used. .
Specifically, for example, the communication method or the like is automatically changed (switched) according to the position information (1 to 3 dimensions) of the communication device (in this example, the mobile communication terminal device 1) or the change compensation is displayed. The communication method, automatically changing the communication method or the like according to the movement direction information (1 to 3 dimensions) of the communication device, or presenting the change compensation, and information on the speed and direction of the communication device (1 Automatically change the communication method or the like according to (~ 3 dimensions) or present a change compensation, or automatically change the communication method or the like according to the acceleration and direction information (1 to 3 dimensions) of the communication device. Or a change compensation can be presented. Further, for example, it is possible to set and hold a conditional expression for executing these processes, or to automatically determine switching of communication methods based on such a conditional expression.
Therefore, in the mobile communication system of this example, the mobile communication terminal apparatus 1 can, for example, perform switching of the communication method smoothly and surely, and reduce costs by saving labor and manpower for switching the communication method. In addition, it is possible to facilitate maintenance by copying (copying) a conditional expression for determining the switching of the communication method.

In the mobile communication system of this example, in the mobile communication terminal device 1, the movement information acquisition unit is configured by the function of the movement information acquisition unit 21, and the function of the control region setting unit 22 and the function of the determination condition storage unit 23. The communication method switching mode determination means is configured by the function of the determination unit 24 and the communication method switching by the function of the communication method switching unit 14, the function of the presentation unit 15, the function of the input unit 16, or the function of the communication method switching unit 14. Processing execution means is configured.
Further, in the mobile communication system of this example, a divided area is configured by the control area, and in the mobile communication terminal device 1, a divided area defining unit and a divided area specifying unit are configured by the function of the control area setting unit 22. .
Further, in the mobile communication system of this example, the determination condition of the switching mode of the communication method is configured by the determination condition made up of the switching condition expression. In the mobile communication terminal device 1, the determination condition information is determined by the function of the determination condition storage unit 23. Storage means is configured.
Further, in the mobile communication system of this example, in the mobile communication terminal apparatus 1, communication method switching candidate information output means and communication method switching information output means are configured by the function of the presentation unit 15, and communication is performed by the function of the input unit 16. A system switching instruction input means is configured.

Here, the configurations of the mobile communication system, the mobile communication terminal device, the base station device, and the like according to the present invention are not necessarily limited to those described above, and various configurations may be used. The present invention can also be provided as, for example, a method or method for executing the processing according to the present invention, a program for realizing such a method or method, or a recording medium for recording the program. It is also possible to provide various devices and systems.
The application field of the present invention is not necessarily limited to the above-described fields, and the present invention can be applied to various fields.
In addition, as various processes performed in the mobile communication system, the mobile communication terminal apparatus, the base station apparatus, and the like according to the present invention, the processor stores, for example, a ROM (Read Only Memory) in a hardware resource including a processor and a memory. A configuration controlled by executing the control program may be used, and for example, each functional unit for executing the processing may be configured as an independent hardware circuit.
Further, the present invention can also be grasped as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the above control program, or the program (itself). The processing according to the present invention can be performed by inputting a program from the recording medium to a computer and causing the processor to execute the program.

(A) is a figure which shows the structural example of the mobile communication system which concerns on one Example of this invention, (b) is a figure which shows the structural example of the mobile communication terminal device which concerns on one Example of this invention. (A) And (b) is a figure which shows an example of the setting of the control area by a block system. It is a figure which shows an example of the management table of a block number. It is a figure which shows an example of the setting of the control area by a polyhedron definition system. It is a figure which shows an example of the setting of the control area by a surface surrounding condition system. It is a figure which shows an example of the procedure of the process of a communication system switching judgment.

Explanation of symbols

  1 ·· Mobile communication terminal device 2 ·· Base station device 11 ·· Antenna 12 ·· Radio communication unit 13 · Communication method determination unit 14 · Communication method switching unit 15 ·· Presentation unit 16・ ・ Input unit, 21 ・ ・ Movement information acquisition unit, 22 ・ ・ Control area setting unit, 23 ・ ・ Judgment condition storage unit, 24 ・ ・ Judgment unit, A ・ ・ Earth, B1, B2 ・ ・ Block, C ・ ・Tetrahedron, D ... spherical, E ... flat,

Claims (1)

In a mobile communication system in which a mobile communication terminal device and a base station device communicate wirelessly,
Mobile information acquisition means for acquiring information about the speed of the mobile communication terminal device and information about the direction of the speed;
A communication mode switching mode determination unit that determines a switching mode of a communication mode used by the mobile communication terminal device based on the information acquired by the mobile information acquisition unit;
A communication system switching process executing means for executing a process related to switching of a communication system used by the mobile communication terminal device based on a determination result by the communication system switching mode determining means;
A mobile communication system comprising:

Images