JP2009044204A - Mobile station apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To realize handoff to a base station apparatus corresponding to a desired communication area effectively by a mobile station device which communicates with the base station apparatus by radio. <P>SOLUTION: An affiliate information storage means 13 stores the information of a communication area to which the apparatus of its own station must belong, a base station information storage means stores the information about the installation position of each of a plurality of base station apparatuses and the information about a communication area formed by the base station apparatuses, positional information acquisition means 11 and 12 acquire the positional information about the apparatus of its own station, and a base station searching means searches a base station apparatus existing at a position closer to the apparatus of its own station as compared with a currently captured base station apparatus and forming a communication area to which the apparatus of its own station must belong based on the positional information about the apparatus of its own station acquired by the base station searching means and the stored information. The base station apparatus searched by a handoff processing means is regarded as a handoff candidate and its handoff processing is performed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a mobile station apparatus that performs handoff (handover) for switching base station apparatuses, and more particularly, to a mobile station apparatus that effectively realizes handoff to a base station apparatus corresponding to a desired communication area.

For example, in a wireless communication system, handoff is performed in which a mobile station apparatus switches base station apparatuses that are communication partners.
FIG. 1 shows a mobile station device 1 and a base station device 2.
The storage unit 13 of the mobile station device 1 stores affiliation information of the mobile station device shown in FIG. 2 and information on the communication area formed by the base station device shown in FIG.
Here, the information shown in FIG. 6 includes identification information (such as “01001” to “02003”) of each base station device (such as “base station A” to “base station I”) and communication area information (“communication”). Area 1 ”to“ communication area 3 ”).

FIG. 4 shows an example of communication areas 1 to 3 formed in the wireless communication system. In the example of FIG. 4, the mobile station device 1 is currently registered in the base station device 2 </ b> A and is capturing the base station device 2 </ b> A, and is communicating using the communication area 1. .
1, 2, and 4 are referred to in examples described later, and are referred to here for convenience of explanation, but there is no intention to unnecessarily limit the present invention. Here, the mobile station apparatus 1 is not provided with the GPS antenna 11 or the GPS receiver 12.

  In the future, the mobile station apparatus 1 that has captured the base station apparatus 2A is any one of the base station apparatus 2B, the base station apparatus 2C, the base station apparatus 2D, the base station apparatus 2E, the base station apparatus 2F, and the base station apparatus 2G. Since there is a possibility of moving to the communication area, the base station device 2B, the base station device 2C, the base station device 2D, the base station device 2E, and the base station device 2F are used as adjacent base station information in the broadcast information of the base station device 2A. The frequency information of the base station device 2G is output.

FIG. 7 shows an example of a processing procedure for handing off the mobile station apparatus 1 to a desired communication area.
The mobile station apparatus 1 measures the received electric field from the base station apparatus currently captured (step S21), and measures the received electric field from the adjacent base station apparatus based on the adjacent base station information in the broadcast information. (Step S23).
When the level of the received electric field from the acquisition base station apparatus reaches (decreases) the reception electric field (threshold value) at which call quality deteriorates (step S22), the received electric field from the acquisition base station apparatus and the previously measured adjacent base station apparatus (Step S24), if the received electric field from the adjacent base station device is larger than the received electric field from the capturing base station device, the frequency is switched to the frequency of the adjacent base station device (step S25). The base station apparatus is captured (step S26), and broadcast information is acquired (step S27).

The mobile station apparatus 1 that has acquired the broadcast information determines whether or not the communication area information of the base station apparatus included in the broadcast information forms a desired (desired) communication area (step S28). When the communication area information of the base station apparatus included in the information matches the information of the desired communication area, a location registration request is transmitted (step S29), a location registration permission is received (step S30), and handoff is performed. To complete.
On the other hand, when the communication area information of the base station device included in the broadcast information does not match the desired one (step S28), the frequency is returned to the frequency of the capturing base station device, and the other adjacent base station devices are reconnected. Search (return to the process of the first steps S21 and S23).

JP 2005-176336 A ARIB STD-T79, "Municipal digital mobile communication system", Japan Radio Industry Association

  However, in the handoff operation as shown in FIG. 7, the mobile station apparatus 1 measures the received electric fields from a plurality of adjacent base station apparatuses. Some time was required.

  For example, when the TDMA (Time Division Multiple Access) method is used, about 360 ms is required for the process of measuring the received electric field from one base station apparatus, and a plurality of measurements are performed to further improve the measurement accuracy. I do. As an example, if the number of times of measurement is 5 and the number of adjacent base station apparatuses is 6, as shown in FIG. 3, the received electric field measurement from the six base station apparatuses is completed, and the received electric field from the base station apparatus again. Measurement is performed after 10.8 seconds (= 360 ms × 5 times × 6 base station apparatuses).

As described above, assuming that 10.8 seconds are required until the measurement is performed again, the reception electric field from the adjacent base station apparatus measured in advance in the process of step S23 shown in FIG. 7 and the reception when the handoff is completed are received. There is a high possibility that an error will occur with the electric field. In particular, when an on-vehicle mobile station device is used, the car is running, so the handoff is completed even if the received electric field is good when measured in advance as the received electric field from the adjacent base station device. In such a case, there is a high possibility that the received electric field has poor call quality.
Therefore, in order to reduce the error, it is necessary to limit the number of measurements of the adjacent base station devices, and thus the number of all adjacent base station devices may not be set in the broadcast information. In addition, it is necessary to reduce the number of measurements by reducing the measurement accuracy of the received electric field.

As described above, the handoff operation as shown in FIG. 7 has a problem that an effective handoff is not realized.
The present invention has been made in view of such a conventional situation, and an object of the present invention is to provide a mobile station apparatus capable of effectively realizing handoff to a base station apparatus corresponding to a desired communication area. To do.

In order to achieve the above object, the present invention has the following configuration in a mobile station apparatus that communicates with a base station apparatus by radio.
That is, the affiliation information storage means stores information on the communication area to which the own station apparatus (the mobile station apparatus) should belong. The base station information storage means stores information on the installation position of each base station device and information on a communication area formed by each base station device for a plurality of base station devices. The position information acquisition unit acquires information on the position of the local station device. Based on the information on the position of the own station apparatus acquired by the position information acquisition means, the information stored in the affiliation information storage means, and the information stored in the base station information storage means, the base station search means A base station device that is located closer to the own station device than the base station device that is captured in step S1 and forms a communication area to which the own station device should belong is searched for. The handoff process executing means executes a process related to handoff using the base station apparatus searched by the base station search means as a candidate for handoff.

  Therefore, for example, the mobile station apparatus is closer to the own station apparatus than the base station apparatus is capturing based on the information on the installation position of the base station apparatus and the position information of the own station apparatus. The base station apparatus should belong to the base station apparatus based on the information on the communication area to which the local station apparatus should belong and the information on the communication area formed by the base station apparatus. By determining whether or not to form a communication area, search for a base station device that satisfies both of these conditions, and by performing processing related to handoff with the searched base station device as a candidate for handoff For example, it is possible to effectively realize handoff to the base station apparatus corresponding to a desired communication area as compared with the conventional case.

Here, various devices may be used as the mobile station device, for example, a vehicle-mounted device mounted on an automobile (car) can be used.
Moreover, as a memory | storage means, it can comprise using a memory, for example.
Moreover, as a means to acquire position information, it can comprise using the apparatus of GPS (Global Positioning System), for example.

  Further, the information stored in the affiliation information storage means and the information stored in the base station information storage means may be set in various modes, for example, may be set in advance, or It may be variably set or changed (rewritten) by a user (person) operating the mobile station device or a higher-level device (for example, a command device) during operation of the system.

  In addition, the communication area is not necessarily limited to a communication area (individual communication area) formed by one base station apparatus, but is a communication area (a combination of individual communication areas formed by two or more base station apparatuses). A wide communication area) may be used. As a wide communication area, for example, an area corresponding to a district under control of a plurality of mobile station devices belonging to a predetermined group can be used. Also, in a wide communication area, for example, the same information is notified from a higher-level device or the like to the mobile station device via the base station device.

  Various timings may be used as a timing for searching for a base station device that is a candidate for handoff, for example, reception of a signal from a base station device that is currently a communication partner (captured). A mode in which another base station apparatus is searched in response to the level (for example, the received electric field level) being equal to or lower than a predetermined threshold (or less than the predetermined threshold) can be used.

  In addition, in the process of searching for a base station device that is a candidate for handoff, for example, after searching for a base station device that is located closer to the own station device (mobile station device) than the base station device being captured Then, processing for determining whether or not the base station apparatus forms a desired communication area is performed. In this case, when there are a plurality of base station devices that are located closer to the own station device (mobile station device) than the base station device being captured, for example, the order from the closest to the farthest In this mode, the communication area can be determined in the communication area. Alternatively, the communication area can be determined only for the closest one. Alternatively, information on a plurality of base station devices can be listed. Thus, it is possible to use a mode in which the positional relationship (separation distance) and communication area with the own station apparatus and the communication area are determined according to the order of the list.

  In addition, in the process of searching for a base station device that is a candidate for handoff, as another example, after searching for a base station device that forms a desired communication area, the base station device is compared with the base station device that is being captured. It is also possible to perform processing for determining whether or not the mobile station device is present at a position close to the local station device (mobile station device). In this case, when there are a plurality of base station apparatuses that form a desired communication area, for example, when information on a plurality of base station apparatuses is in a list, the communication area and the local station are arranged according to the order of the list. A mode in which the positional relationship (separation distance) with the apparatus is determined can be used.

  In addition, as processing related to handoff, various processing may be used. For example, a process of switching a frequency used by a base station device that is a candidate for handoff to be used for wireless communication to the wireless communication, Processing for detecting a reception level of a signal from a station apparatus (for example, a reception electric field level), or a reception level of a signal from the base station apparatus exceeds (or exceeds) a reception level of a signal from the base station apparatus being captured. In this case, it is possible to use processing that is actually determined as a handoff target, processing that performs acquisition, reception of broadcast information, and location registration of the local station device for the base station device that is actually determined as a handoff target. .

  The frequency information used by each base station device for radio communication is, for example, stored in advance in the memory of the mobile station device or externally (for example, a higher-level device or mobile station) at any timing during operation. A mode in which the mobile station apparatus is set (stored) in the memory of the mobile station apparatus in accordance with an instruction from the apparatus user, or the mobile station apparatus is included in a signal wirelessly transmitted from each base station apparatus. A mode may be used in which a frequency used by each base station device is searched and specified based on the identification information (for example, base station number) of each base station device.

  As described above, according to the mobile station apparatus according to the present invention, information on the communication area to which the own station apparatus (the mobile station apparatus) should belong, information on the installation position of each base station apparatus, and information on the communication area are obtained. Since the base station device that is a candidate for handoff is searched based on these information and the acquired location information of the local station device, and the processing related to handoff is executed for the searched base station device, for example, In comparison, handoff to a base station apparatus corresponding to a desired communication area can be effectively realized.

  Embodiments according to the present invention will be described with reference to the drawings.

A first embodiment of the present invention will be described.
FIG. 1 shows a mobile station apparatus 1 and a base station apparatus 2 provided in a radio communication system according to an embodiment of the present invention.
The mobile station device 1 communicates wirelessly with a GPS antenna 11 for receiving radio waves from GPS satellites, a GPS receiver 12, a storage unit (storage device) 13 composed of, for example, a memory, and the base station device 2. A wireless communication antenna 14 is provided.
The base station device 2 includes a wireless communication antenna 21 for performing wireless communication with the mobile station device 1.
The base station apparatus 2 and the mobile station apparatus 1 communicate by radio using the radio communication antennas 14 and 21.
In addition, in this example, illustration and description are abbreviate | omitted about the more detailed structure of the mobile station apparatus 1 and the base station apparatus 2. FIG.

In the storage unit 13 of the mobile station apparatus 1, the affiliation information of the mobile station apparatus shown in FIG. 2, the coordinate position information of the installation of the base station apparatus shown in FIG. 3, and the communication area information formed by the base station apparatus are stored. Remembered.
In the information shown in FIG. 2, the mobile station number (for example, “010001”) that is identification information of the local station (the mobile station device 1) and the affiliation information (for example, information of the communication area to which the local station belongs) "Communication area 1").

  In the information shown in FIG. 3, base station numbers (for example, “01001” to “02003”, etc.) that are identification information of each base station apparatus (for example, “base station A” to “base station I”); Information on the coordinate position where each base station apparatus is installed (for example, latitude (** degrees ** minutes *** seconds) and longitude (** degrees ** minutes ** seconds)), and each base station apparatus Are associated with communication area information (for example, “communication area 1”, “communication area 2”, “communication area 3”).

  Note that the information shown in FIG. 2 and the information shown in FIG. 3 may be stored in advance in the storage unit 13 of each mobile station device 1 by initial setting or the like, or a higher-level device (for example, a command device) Etc.), such as information notified from the outside to the mobile station device 1 via the base station device, etc., based on information notified from the outside to the mobile station device 1, etc. Alternatively, the operation key of the mobile station device 1 may be initialized or changed (rewritten) according to the content operated by the user (person).

FIG. 4 shows a configuration example of a communication area of the wireless communication system of this example.
In the wireless communication system of this example, a plurality of base station apparatuses 2A to 2I are installed in a predetermined arrangement, and individual communication areas 3A to 3I are formed for each base station apparatus 2A to 2I, and two or more A plurality of wide communication areas 1, 2, and 3 are formed by combining the individual communication areas of the base station apparatus.
In such wide communication areas 1 to 3, for example, the same information (for example, voice information) is wirelessly transmitted from the base station apparatus to the mobile station apparatus 1.

Specifically, in this example, the communication area 3A of the base station device 2A, the communication area 3B of the base station device 2B, the communication area 3C of the base station device 2C, and the communication area 3H of the base station device 2H 1, the communication area 3D of the base station device 2D, the communication area 3E of the base station device 2E, and the communication area 3I of the base station device 2I form a communication area 2 of the base station device 2F. A communication area 3 is formed by the communication area 3F and the communication area 3G of the base station device 2G.
In this example, the mobile station apparatus 1 is currently registered in the base station apparatus 2A and is capturing the base station apparatus 2A, and is communicating using the communication area 1. .

  Further, in this example, each of the base station devices 2A to 2I is assigned with any one of a plurality of frequencies so as not to interfere, for example, between adjacent base station devices. The station apparatuses 2A to 2I perform radio communication with the mobile station apparatus 1 using the frequency allocated to the own station. In addition, the mobile station device 1 has a function that can be used for wireless communication by switching the plurality of frequencies that can be used in the base station device.

With reference to FIG. 5, an example of the procedure of the process in which the mobile station apparatus 1 hands off to the desired communication area is shown. In this example, it is assumed that the mobile station device 1 is mounted on a car (for example, a fire engine or an ambulance).
The mobile station apparatus 1 measures the received electric field from the currently captured base station apparatus (captured base station apparatus) (step S1), and receives GPS information from the GPS satellite by the GPS antenna 11 and the GPS receiver 12. Then, based on the GPS position information, the position of the vehicle (the position of the mobile station device 1) is detected (step S4).

When the level of the received electric field from the capturing base station apparatus reaches (decreases) the received electric field (threshold value) at which the call quality deteriorates (step S2), information on the coordinate position of the base station apparatus stored in the storage unit 13 and The current vehicle position information is compared (step S5), and it is determined whether or not there is a base station device (for example, closer one) closer to the vehicle position than the captured base station device ( Step S6).
As a result of this determination, if there is a base station device closest to the capturing base station device (in this case, for example, the base station device 2A), the mobile station device 1 is desired to be the nearest base station device searched for. It is determined whether or not the base station device forms a communication area (here, for example, communication area 1) (step S7).

If the searched base station apparatus is a base station apparatus that forms a communication area desired by the mobile station apparatus 1, the mobile station apparatus 1 sets the frequency used for wireless communication to the frequency of the base station apparatus. (Step S8), and the received electric field from the nearest base station apparatus is measured (step S9).
Then, the mobile station apparatus 1 compares the magnitude of the received electric field between the base station apparatus that has been captured up to now and the base station apparatus that has switched frequency (neighboring base station apparatus) (step S10). When the received electric field from the device is larger, the base station device is captured (step S11), and broadcast information from the base station device is received and acquired (step S12). The location registration request is transmitted (step S13), the location registration permission is received from the base station apparatus (step S14), and the handoff is completed.

  On the other hand, when the latest base station apparatus searched in the process of step S7 is not a base station apparatus that forms the communication area desired by the mobile station apparatus 1, or switching is performed in the process of step S10 described above. When the received electric field from the base station apparatus is lower than the received electric field from the base station apparatus that has been captured so far, when the coordinate position information of all the base station apparatuses has not been searched (step S15), Re-search the coordinate position information of the base station apparatus and return to the process of step S5. When the coordinate position information of all base station apparatuses is searched (step S15), the first process (process of steps S1 and S3) Return to).

  As described above, the mobile station apparatus 1 of this example includes the GPS antenna 11 for receiving radio waves from GPS satellites, the GPS receiver 12, and the wireless communication antenna 14 for performing wireless communication with the base station apparatus 2. And a storage unit 13 for storing the affiliation information of the communication area to which the mobile station apparatus belongs and the coordinate position information and communication area information of a plurality of installed base station apparatuses. The base station device that is close to (for example, the closest) to the own vehicle position is searched from the own vehicle position of the own mobile station device determined by the above and the coordinate position information of the base station device stored in the storage unit 13. It is determined whether the base station device is a base station device that forms a communication area desired by the mobile station device, and if so, the received electric field from the base station device is measured and the received electric field condition is satisfied. If so, the base station Perform a handoff to the location.

Therefore, the mobile station apparatus 1 of this example can effectively perform handoff to switch to the base station apparatus corresponding to the desired communication area.
As a specific example, in the handoff operation as shown in FIG. 7, after measuring the received electric field from the adjacent base station apparatus (adjacent base station apparatus), it is determined whether or not the received electric field meets the conditions. If the condition is met, it has been determined whether or not the communication area of the base station device matches the desired communication area, so the processing load and processing time have increased. In this example, the mobile station The processing load and processing time required for handoff are determined by selecting a base station device that is located close to the device 1 and corresponding to a desired communication area and then determining the received electric field from the base station device. Can be made relatively small.

  In the mobile station apparatus 1 of this example, the belonging information storage means is configured by the function of storing the information shown in FIG. 2 in the storage unit 13, and the function of storing the information shown in FIG. Constitutes a base station information storage means, and a position information obtaining means is constituted by a function of obtaining information on the position of the own station apparatus by the GPS antenna 11 or the GPS receiver 12, for example, a control unit (not shown). ) Is a base station search means having a function of searching for a base station device that is a candidate for handoff by the processing of step S5 to step S7 and step S15 shown in FIG. 5, for example, a control unit (not shown) Or a wireless communication unit (not shown) having a function of executing processing relating to handoff by the processing of steps S8 to S14 shown in FIG. It is configured. In this example, as desired communication areas to which the mobile station apparatus 1 should belong, communication areas 1 to 3 formed by a plurality of base station apparatuses are used as shown in FIG.

A second embodiment of the present invention will be described.
In this example, an example of a system to which the present invention can be applied is shown.
FIG. 8 shows a configuration example of a fire fighting digital radio system which is an example of a disaster prevention digital radio system.
The firefighting digital wireless system of this example includes a command device (command console) 31 having an operation unit 41, a display unit 42, and a storage unit 43, a line control device (wireless line control device) 32, and a plurality of n bases. Station devices G1 to Gn, a plurality of n remote controllers H1 to Hn, and a plurality of m mobile station devices I1 to Im are provided.
Each of the mobile station devices I1 to Im is composed of an in-vehicle device 51 and a portable device 52, and has a table 53 on which the portable device 52 is placed.

The firefighting digital wireless system of this example can be used for regional disaster prevention in each prefecture such as Tokyo. In this example, the command device 31 and the line control device 32 are installed in the disaster prevention center, and the base station devices G1 to Gn are installed in the fire station or on the building, in the city, on the mountain, etc. The controllers H1 to Hn are installed in the fire department, and the mobile station devices I1 to Im are installed in vehicles such as fire engines or ambulances.
In each vehicle, for example, the in-vehicle device 51 and the pedestal 53 are mounted and attached to the respective vehicles, and the portable device 52 can be carried by a person or placed on the pedestal 53.
It should be noted that a plurality of systems similar to those shown in FIG. 8 are provided, and one of the systems is operated and the other system is put on standby, and the spare system is operated when the operating system fails. Therefore, it is possible to adopt a configuration in which the entire operation is continued.
Various devices such as a fixed device, a semi-fixed device, a portable device, and a portable device may be used as subordinate devices that communicate with the base station devices G1 to Gn.

The outline | summary of the operation | movement performed in the firefighting digital radio system of this example is shown.
In the command device 31, the operation unit 41 is operated by a person (commander) to input various instructions and information, and the display unit 42 displays and outputs various information to be displayed on the screen. The stored storage unit 43 stores various information to be stored.
The commander can transmit various instructions from the commanding device 31 to the subordinate devices (line control device 32, base station devices G1 to Gn, remote controllers H1 to Hn, mobile station devices I1 to Im). In addition, the commander can view various information received by the commanding device 31 from the subordinate devices on a screen display. Necessary information is stored in the storage unit 43.

The line control device 32 is connected to the command device 31 and the plurality of base station devices G1 to Gn, for example, by wire, relays communication between them, and performs various controls relating to a wireless line and the like.
Each base station apparatus G1 to Gn communicates wirelessly with mobile station apparatuses I1 to Im existing in a communicable area (area), and also communicates with each remote controller H1 to Hn connected by wire. Communicate between.
Each of the remote controllers H1 to Hn communicates with each of the base station devices G1 to Gn connected by wire, and has, for example, the same function as a mobile station device, and is operated by a person (signer). Is done.
Each of the mobile station devices I1 to Im communicates wirelessly with the base station devices G1 to Gn in which the mobile station devices I1 to Im are accommodated.

FIG. 9 shows a configuration example of the in-vehicle device 51 and a configuration example of the portable device 52.
The in-vehicle device 51 includes an antenna 61, a radio unit 62, a key operation unit 63, a display unit 64, a microphone unit 65 having a microphone, a speaker unit 66 having, for example, two speakers, a memory 67, and a portable interface. 68 and a control unit 69.
The portable device 52 includes an antenna 71, a wireless unit 72, a key operation unit 73, a display unit 74, a microphone unit 75 having a microphone, a speaker unit 76 having a speaker, a memory 77, an in-vehicle interface 78, A control unit 79 is provided.
Here, the internal processing function of the in-vehicle device 51 and the internal processing function of the portable device 52 are generally the same, although there are differences, for example, the number of speakers is different.

  In the vehicle-mounted device 51, the wireless unit 62 wirelessly transmits and receives signals to and from the base station devices G1 to Gn via the antenna 61, the key operation unit 63 receives a key operation from a person (user), and the display unit 64 displays information to the user on the screen, the microphone unit 65 inputs sound (sound) emitted by the user or the like, the speaker unit 66 outputs sound (sound) to the user, and the memory 67 stores, for example, call information (ID information) that is a telephone number to be called, the portable interface 68 communicates with the in-vehicle interface 78 of the portable device 52 by, for example, an optical signal, and the control unit 69 performs various controls. I do.

  Similarly, in the portable device 52, the wireless unit 72 wirelessly transmits and receives signals to and from the base station apparatuses G1 to Gn via the antenna 71, and the key operation unit 73 receives a key operation from a person (user). The display unit 74 displays information to the user on the screen, the microphone unit 75 inputs sound (sound) emitted by the user, and the speaker unit 76 outputs sound (sound) to the user. The memory 77 stores, for example, call information (ID information) that is a telephone number to be called, and the in-vehicle interface 78 communicates with the portable interface 68 of the in-vehicle device 51 by, for example, an optical signal, and the control unit 79 Perform various controls.

Here, the same information is set as the call information (ID information) stored in the memory 67 of the in-vehicle device 51 and the call information (ID information) stored in the memory 77 of the portable device 52.
The in-vehicle device 51 and the portable device 52 can communicate between the portable interface 68 and the in-vehicle interface 78 in a state where the portable device 52 is placed on the pedestal 53. For example, the portable device 52 Communication is not performed between the portable interface 68 and the vehicle-mounted interface 68 in a state where the portable interface 68 is removed from the table 53 and carried.

In this example, in a state where the portable device 52 is set (placed) on the pedestal 53, the portable device 52 does not particularly function, and reception from the base station devices G1 to Gn and base station devices G1 to Gn are performed. Transmission, key input, display output, voice input, voice output, etc. are all performed by the in-vehicle device 51.
On the other hand, in a state where the portable device 52 is detached from the pedestal 53, the portable device 52 receives from the base station devices G1 to Gn, transmits to the base station devices G1 to Gn, key input, display output, and voice. Input, audio output, and the like are all performed. In this state, the vehicle-mounted device 51 performs only reception from the base station devices G1 to Gn, display output, and audio output. That is, the same call information (ID information) is set in the in-vehicle device 51 and the portable device 52, and both can be received simultaneously, but transmission is performed one by one.

In addition, the portable device 52 removed from the pedestal 53 performs wireless communication directly with the base station devices G1 to Gn without using the in-vehicle device 51. This point is considered to be different from a handset of a normal parent-child phone.
Further, the state in which the portable device 52 is set on the table 53 or the state in which the portable device 52 is removed from the table 53 is detected by the in-vehicle device 51 or the portable device 52, and the respective control units 69 and 79 according to the state at that time. Executable functions (or non-executable functions) are set.

Further, the in-vehicle device 51 has two speakers. For example, when the portable device 52 is detached from the pedestal 53, the contents of a call transmitted from the base station devices G1 to Gn to the portable device 52 are one. Audio from the other speaker, and the content of the call transmitted from the portable device 52 to the base station apparatuses G1 to Gn is output from another speaker.
As an example, mobile station devices I1 to Im are provided in a fire truck or the like, and the fire engine or the like is on the scene of a fire or the like, and a member goes out of the fire truck or the like with a portable device 52. When the other member is active and waits inside the fire engine or the like, the other member listens to the sound output from the in-vehicle device 51, so that the portable device 52 and the base station devices G1 to Gn You can listen to the content of calls made at.
For example, different frequencies are used for downlink communication from the base station apparatuses G1 to Gn to the mobile station apparatuses I1 to Im and uplink communication from the mobile station apparatuses I1 to Im to the base station apparatuses G1 to Gn. .

  In addition, as communication between the base station devices G1 to Gn (for example, the command device 31) and the mobile station devices I1 to Im, for example, a configuration in which press talk communication is performed may be used. A configuration in which two-way simultaneous communication such as a normal mobile phone is performed may be used, or a configuration in which communication in another mode is performed may be used. Also, information for notification is transmitted from the base station devices G1 to Gn to the mobile station devices I1 to Im, and the mobile station devices I1 to Im (automatically) receive the information in response to the reception of the information. A configuration that outputs data can also be used.

In the case of a fire engine, for example, press talk communication is used, the mobile station devices I1 to Im of a plurality of fire engines are called from the command device 31, and group communication (for example, group communication on a business link) is performed. By carrying out a press talk communication in the inside, it is possible to perform the same fire site treatment by these plural fire engines.
In the case of an ambulance, for example, communication such as a normal telephone is used, and a call can be performed by speaking (calling) and receiving.
In addition, for example, it is possible to provide the vehicle-mounted device 51 and the portable device 52 with a function capable of performing wireless communication even at a location apart between the vehicle-mounted device 51 and the portable device 52. In this case, as an example, when the portable device 52 is taken out of the vehicle in a dead zone such as in a tunnel, the in-vehicle device 51 and the portable device 52 can be used to communicate with each other using a transceiver.

Here, the configuration of the system and apparatus according to the present invention is not necessarily limited to the configuration 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 systems and devices.
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 system and apparatus according to the present invention, for example, the processor executes a control program stored in a ROM (Read Only Memory) in hardware resources including a processor and a memory. A controlled configuration may be used, and for example, each functional unit for executing the processing may be configured as an independent hardware circuit.
The present invention can also be understood as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, and the program (itself). The processing according to the present invention can be performed by inputting the program from the recording medium to the computer and causing the processor to execute the program.

It is a figure which shows the structural example of the mobile station apparatus which concerns on one Example of this invention. It is a figure which shows an example of the affiliation information of a mobile station apparatus. It is a figure which shows an example of the coordinate position information and communication area information of a base station apparatus. It is a figure which shows an example of the communication area of a radio | wireless communications system. It is a figure which shows an example of the procedure of the process of the handoff performed by the mobile station apparatus which concerns on one Example of this invention. It is a figure which shows an example of the communication area information of a base station apparatus. It is a figure which shows an example of the procedure of the process of the handoff performed by a mobile station apparatus. It is a figure which shows the structural example of a firefighting digital radio system. It is a figure which shows the structural example of a vehicle equipment and a portable device.

Explanation of symbols

1 .... Mobile station device, 2, 2A-2I ... Base station device, 11 .... GPS antenna, 12 .... GPS receiver, 13 .... Storage unit, 14, 21 ... Wireless communication antenna, 3A-3I ...・ Communication area,
31..Command device, 32..Line control device, 41..Operation unit, 42..Display unit, 43..Storage unit, 51..In-vehicle device, 52..Portable device, 53..Place, G1. Gn ··· Base station device, H1 to Hn ··· Remote controller, I1 to Im · · Mobile station device, 61, 71 · · Antenna, 62, 72 ··· Wireless unit, 63, 73 · · Key operation unit, 64 74, Display unit, 65, 75, Microphone unit, 66, 76, Speaker unit, 67, 77, Memory, 68, Mobile interface, 69, 79, Control unit, 78, In-vehicle interface,

Claims (1)

In a mobile station device that communicates wirelessly with a base station device,
Affiliation information storage means for storing information of a communication area to which the local station apparatus should belong;
Base station information storage means for storing information on the installation position of each base station device and information on a communication area formed by each base station device for a plurality of base station devices;
Position information acquisition means for acquiring information of the position of the local station device;
Based on the information on the position of the own station apparatus acquired by the position information acquisition means, the information stored in the affiliation information storage means, and the information stored in the base station information storage means, A base station search means for searching for a base station device that is located closer to the own station device than the station device and forms a communication area to which the own station device should belong;
Handoff processing execution means for executing processing related to handoff with the base station device searched by the base station search means as a candidate for handoff,
A mobile station apparatus comprising:

Images