JP4575353B2 - Mobile station equipment - Google Patents

Description

  The present invention relates to a mobile station apparatus that performs a handoff (also referred to as a handover) for switching a base station apparatus, and more particularly to a mobile station apparatus that switches to a base station apparatus corresponding to a desired communication area.

FIG. 1 shows an example of a wireless communication system. Details of FIG. 1 will be described in an embodiment according to the present invention described later.
In such a wireless communication system, the mobile station apparatus 5 performs handoff.
FIG. 15 shows an example of the procedure of base station switching processing (handoff processing) performed by the mobile station apparatus 5.

At present, the mobile station apparatus 5 located at the point a measures the received electric field level of the base station apparatus 3A being captured (step S101) and measures the received electric field level of another adjacent base station apparatus (step S101). Step S103).
When the mobile station apparatus 5 moves from the point a to the point b, the received electric field level of the captured base station apparatus 3A becomes lower than a preset threshold value (step S102), the previous measurement The received electric field level of the adjacent base station apparatus obtained by (or obtained by later measurement) is compared with the received electric field level of the captured base station apparatus 3A (step S104).

  As a result of this comparison, when the received electric field level of the adjacent base station apparatus (for example, base station apparatus 3B) is higher than the received electric field level of the captured base station apparatus 3A, the mobile station apparatus 5 is adjacent. Switching to the frequency of the base station apparatus (step S105), capturing the switched base station apparatus (step S106), receiving and obtaining necessary broadcast information from the base station apparatus (step S107), A location registration request is transmitted to the base station device (step S108), the location registration permission transmitted from the base station device is received (step S109), and the handoff process is completed.

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

  However, in the handoff process as described above, it may occur that the communication areas R1 and R2 of the base station apparatus to which the mobile station apparatus 5 has handed off are not desired by the mobile station apparatus 5, and the command There has been a problem that voice information and the like sent from the device 1 to the same communication areas R1 and R2 cannot be continuously received.

  As a specific example, when the mobile station device 5 moves from the point a to the point b, the mobile station device 5 starts handoff when the received electric field level of the captured base station device 3A becomes lower than the threshold, but is not necessarily the same. The reception field level of the adjacent base station apparatus 3B forming the communication area R1 is not necessarily high, and the reception field level of the adjacent base station apparatus 3C forming another communication area R2 may be high. Thus, when the received electric field level of the base station apparatus 3C that forms another communication area R2 among the adjacent base station apparatuses is high, the mobile station apparatus 5 communicates with the communication area formed by the base station apparatus 3C. Since handoff to R2 is performed, the contents of communication from the command device 1 to the original communication area R1 cannot be transmitted to the mobile station device 5.

  The present invention has been made in view of such a conventional situation, and provides a mobile station apparatus that can switch to a base station apparatus corresponding to a desired communication area when performing a handoff to switch base station apparatuses. With the goal.

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.
In other words, the base station device that is a candidate for the communication partner communicates with the base station device as the communication partner candidate based on the information specifying the communication area (desired communication area) in which the own device (the mobile station device) is required to move. It is determined whether or not an area is formed. When it is determined by the determination unit that the base station device that is a candidate for the communication partner forms the communication area, the control unit executes processing for setting the base station device as a communication partner.
Therefore, for example, when performing a handoff to switch base station apparatuses, it is possible to switch to a base station apparatus corresponding to a desired communication area, and to continuously receive voice information and the like sent to the desired communication area.

Here, the information for specifying the communication area in which the mobile station apparatus is required to move may be set in advance in the mobile station apparatus or may be input to the mobile station apparatus from the outside.
Various information may be used as information for specifying the communication area. For example, not only information for specifying the communication area itself but also information for specifying indirectly such as a district corresponding to the communication area. May be used.
Further, as the communication area, for example, an area in which individual communication areas (individual communication areas) of two or more base station devices are combined is used, and the same communication information is transmitted to the base station device in the same communication area. Over the air.

In addition, as a base station device that is a candidate for a communication partner, for example, in handoff, another base station device (adjacent base station device) that has an individual communication area adjacent to the individual communication area of the base station device that is currently the communication partner. For example, when there is no base station apparatus that is currently a communication partner, a new base station apparatus may be used.
In addition, as information for associating a base station apparatus with a communication area (by an individual communication area) formed by the base station apparatus, for example, the information may be set in advance in the mobile station apparatus or captured at present. The mobile station apparatus may be notified from a base station apparatus or a base station apparatus that is a candidate for a communication partner.

  In addition, as processing for setting a predetermined base station device as a communication partner, for example, in handoff, processing for switching a base station device as a communication partner from the current base station device to another candidate base station device is used. For example, when a new base station apparatus is used as a communication partner, processing for that purpose is used.

In addition, when there is no switchable base station device corresponding to a communication area in which the mobile station device is required to move, as an example, the requested communication area is given priority, but a suitable base station device is If not found, a mode may be used in which a base station apparatus that does not correspond to the requested communication area is used as a communication partner. As another example, the required communication area is fixed and the base station apparatus is adapted. If no base station device is found, a mode may be used in which none of the base station devices is a communication partner.
Moreover, a means for switching between such a preferential mode and a fixed mode according to an instruction input from an external person or apparatus may be provided.

The mobile station apparatus according to the present invention has the following configuration as a configuration example.
That is, the input means inputs information specifying the communication area in which the own device (the mobile station device) is required to move from the outside.
Therefore, the destination of the mobile station apparatus can be instructed from the outside.

  Here, as a mode of inputting information from the outside, for example, a mode in which a person operates and inputs an operation unit of a mobile station device, or information transmitted from a predetermined device such as a command device (for example, A mode in which the mobile station apparatus receives and inputs (via a base station apparatus or the like) can be used.

The mobile station apparatus according to the present invention has the following configuration as a configuration example.
That is, the search means performs a determination by the determination means to search for a base station device as a communication partner. When the search by the search unit fails, the control unit shifts to a mode (mode for direct communication between mobile stations) that executes processing for directly communicating with other mobile station apparatuses.
Therefore, if a base station device corresponding to the required communication area is not found, if such a partner is found by searching for a partner (other mobile station device) that performs direct communication between mobile stations, Information can be acquired through direct communication between mobile stations.

  Here, as a case where the search of the base station device as a communication partner fails, for example, when no base station device as a communication partner candidate is detected, or all ( When it is determined that none of the (one or more) base station apparatuses are suitable for the required communication area, or the base station apparatus corresponding to the required communication area is searched for a predetermined time. The case where it was not detected can be used.

  As described above, according to the mobile station apparatus of the present invention, for example, when performing a handoff to switch base station apparatuses, whether or not a base station apparatus that is a communication partner candidate using communication area information is set as a communication partner. Since it is determined whether or not, it is possible to switch to a base station apparatus corresponding to a desired communication area, and to continuously receive voice information and the like sent to the desired communication area.

Embodiments according to the present invention will be described with reference to the drawings.
FIG. 1 shows a configuration example of a radio communication system according to an embodiment of the present invention.
The wireless communication system of this example includes a command device 1, a line control device 2, a plurality of base station devices 3 </ b> A to 3 </ b> D, and a plurality of mobile station devices 5.
In this example, four base station apparatuses 3A, 3B, 3C, and 3D are illustrated, and one mobile station apparatus 5 is illustrated.
In addition, individual communication areas (individual communication areas) 4A, 4B, 4C, and 4D of the base station devices 3A, 3B, 3C, and 3D are shown.

The command device 1 and the line control device 2 are connected by wire (or wireless), and communication between them is possible.
The line control device 2 and each of the plurality of base station devices 3A to 3D are connected by wire (or wireless), and can communicate with each other.
Each base station apparatus 3A-3D can register the mobile station apparatus 5 which exists in each separate communication area 4A-4D, and can communicate by radio | wireless with the mobile station apparatus 5. FIG. In this example, digital wireless communication is performed by a TDMA (Time Division Multiple Access) method.
With such a configuration, it is possible to communicate between the command device 1 and each mobile station device 5 via the line control device 2 and the base station devices 3A to 3D.

Different frequencies are set in the plurality of base station apparatuses 3A to 3D as frequencies used for wireless communication.
It is also possible to form a communication area configured by combining individual communication areas of two or more base station devices. As a specific example, when the line control device 2 forms a path (area formation) for the base station device 3A and the base station device 3B, the individual communication area 4A of the base station device 3A and the individual communication area 4B of the base station device 3B are combined. Can be regarded as the same communication area R1 (communication area 1), and the same audio information can be sent. Similarly, when the line control device 2 forms a path (area formation) for the base station device 3C and the base station device 3D, the individual communication area 4C of the base station device 3C and the individual communication area 4D of the base station device 3D are combined. It is possible to send the same audio information by regarding the same as the same communication area R2 (communication area 2).

As described above, the line control device 2 forms the communication areas R1 and R2, so that the same communication can be performed using two or more base station devices using different frequencies. Different communication can be performed in the communication areas R1 and R2.
In this example, communication areas R1 and R2 for performing the same communication using two or more base station apparatuses are shown. For example, only one base station apparatus is used as necessary. A communication area for performing the same communication may be formed.

For example, as shown in FIG. 1, when the mobile station device 5 moves from point a to point b, the mobile station device 5 moves from the individual communication area 4A of the base station device 3A to the individual communication area 4B of the base station device 3B. Therefore, the mobile station apparatus 5 switches the base station apparatus as a communication partner and continues communication. This is called handoff (or handover).
Here, if the base station apparatus 3A and the base station apparatus 3B have a path formed as the same communication area R1, even if the mobile station apparatus 5 performs a handoff from the base station apparatus 3A to the base station apparatus 3B, the same communication is performed. Can be continued.

FIG. 2 shows an example of broadcast information transmitted from each base station apparatus 3A to 3D to the mobile station apparatus 5 by radio (see, for example, Non-Patent Document 1: ARIB STD-T79). ).
The broadcast information is broadcast to notify, for example, information on the structure of the control channel, information for determining a standby channel, regulation information, and the like.

  The broadcast information of this example includes a network number that is information for identifying the control zone and the base station devices 3A to 3D, and restriction information of the base station devices 3A to 3D (for example, information on access restriction due to maintenance, etc.) A standby permission level that is a reception level at which the mobile station device 5 is within a standby range, a standby deterioration level that is a reception level at which the mobile station device 5 that is determined to be out of range, and the mobile station device 5 performs channel switching. The channel switching level that is the reception level to be performed, the number of control channels for peripheral zone determination that is the number of control channels to be monitored for peripheral zone determination, and the control channel number that is the channel number to be monitored for peripheral zone determination Contains information.

Note that the standby permission level and the standby deterioration level are used to determine whether or not the mobile station device 5 can perform location registration in the base station devices 3A to 3D.
The channel switching level is a guideline for determining whether or not a call is possible, for example, and is used to determine whether or not the mobile station device 5 performs channel switching (handoff). In the example, it is used as a threshold value (for example, a threshold value used in step S2 in FIG. 4) for comparison with the received electric field level from the capturing base station apparatus.
Further, each mobile station device 5 stores the correspondence between the network number, the channel number, and the frequency in advance in, for example, a memory for each of the base station devices 3A to 3D.

Moreover, the mobile station apparatus 5 recognizes the frequency of the adjacent base station apparatus by the control channel number for the surrounding zone determination included in the broadcast information received from the base station apparatuses 3A to 3D currently captured. Based on this, it is possible to measure the received electric field level of the adjacent base station apparatus.
In the present embodiment, the mobile station apparatus 5 performs radio communication by the TDMA method, and detects the received electric field level from the base station apparatus currently captured by, for example, time division processing, while It is possible to detect the received electric field level from the station apparatus.

Further, when the mobile station apparatus 5 detects the received electric field level of the base station apparatus currently captured and the received electric field level of an adjacent base station apparatus, for example, a speech channel may be used, or The control channel may be used. For example, the reception electric field level is measured using the call channel (or the control channel substituted for the call channel) during a call, and the control channel is used during a non-call. It is possible to measure the received electric field level.
Further, as the received electric field level, for example, an RSSI (received electric field strength) level can be used.

Here, the radio | wireless communications system of this example is applicable to disaster prevention radio systems, such as a fire fighting, for example.
In this case, for example, the command device 1 and the line control device 2 are installed in a fire department or the like, and the base station devices 3A to 3D are installed so as to form desired individual communication areas 4A to 4D in each region. Further, a wider communication area can be realized by forming communication areas R1 and R2 that combine the individual communication areas of two or more base station apparatuses. Such a communication area can be used, for example, to delimit an activity range of firefighters in each region. As the mobile station device 5, a wireless communication device installed in a fire engine or an ambulance or a portable wireless terminal device that can be carried by a person can be used.

A first embodiment of the present invention will be described.
FIG. 3 shows an example of network number information included in the broadcast information of this example.
In this example, as the network number information shown in FIG. 2, information that associates the network number with information (communication area information) that identifies the communication areas R1 and R2 is used for each of the base station devices 3A to 3D. . Here, each base station apparatus 3A-3D includes the network number and communication area information regarding its own apparatus (each base station apparatus 3A-3D) in the broadcast information, for example.
Thereby, the mobile station apparatus 5 can detect and grasp | ascertain the network number and communication area information of the said base station apparatus 3A-3D based on the alerting | reporting information received from base station apparatus 3A-3D.

  The communication area information is information specifying communication areas R1 and R2 for sending the same information from the command device 1, for example. In this example, information specifying the communication area R1 is associated with the base station device 3A and the base station device 3B, and information specifying the communication area R2 is associated with the base station device 3C and the base station device 3D.

FIG. 4 shows an example of the procedure of base station switching processing (handoff processing) performed by the mobile station apparatus 5 of this example.
At present, the mobile station apparatus 5 located at the point a measures the received electric field level of the base station apparatus 3A being captured (step S1), and measures the received electric field level of another adjacent base station apparatus (step S1). Step S3).
When the mobile station apparatus 5 moves from the point a to the point b, the received electric field level of the captured base station apparatus 3A becomes lower than a preset threshold value (step S2), the previous measurement The received electric field level of the adjacent base station apparatus obtained by (or obtained by later measurement) is compared with the received electric field level of the captured base station apparatus 3A (step S4).
Here, as the threshold value, in this example, the value of the channel switching level in the broadcast information received from the base station device 3A is set and stored in the memory of the mobile station device 5.

If the received electric field level of the adjacent base station device is higher than the received electric field level of the captured base station device 3A as a result of the comparison, the mobile station device 5 switches to the frequency of the adjacent base station device. (Step S5), the switched base station apparatus is captured (step S6), and necessary broadcast information is received and acquired from the base station apparatus (step S7).
Then, the mobile station device 5 identifies the communication area R1, R2 of the base station device based on the network number information in the broadcast information received from the base station device, and the communication area R1, It is determined whether or not R2 is a communication area desired by the own device (the mobile station device 5) (step S8), and if it is a desired communication area (when both communication areas match), A location registration request is transmitted to the base station device (step S9), the location registration permission transmitted from the base station device is received (step S10), and the handoff process is completed.

Here, when there are a plurality of base station devices (for example, the base station device 3B and the base station device 3C) adjacent to the captured base station device 3A, the mobile station device 5 performs the process of step S4. Are performed in order for each base station apparatus, and if the adjacent base station apparatus does not correspond to the desired communication area in the process of step S8, the process returns to the initial process (steps S1 and S3) again. In addition, there is no limitation in particular as an order which performs the process of step S4 in order about a some adjacent base station apparatus, For example, the order with a high received electric field level etc. can be used.
Also, when the received electric field level of the captured base station apparatus 3A is equal to or higher than the threshold value in step S2, or the received electric field level of an adjacent base station apparatus is acquired in step S4. If it is below the received electric field level of the station apparatus 3A, the process returns to the first process (steps S1 and S3) again.

As a specific example, when the mobile station device 5 currently captures the base station device 3A forming the communication area R1 and wishes to move to the same communication area R1 after handoff, the mobile station device 5 For example, the device 5 does not perform handoff to the base station device 3C even if the base station device 3C corresponding to the other communication area R2 has a higher received electric field level, but does not perform the handoff to the base station device 3C. By performing handoff to the station device 3B, it is possible to receive without interruption the voice information or the like sent from the command device 1 to the communication area R1, and to output the voice to a person.
The information on the communication areas R1 and R2 desired by each mobile station device 5 may be set in advance, or may be set by an instruction from an external person or another device.

As described above, in the mobile station apparatus 5 of this example, the received electric field level of the base station apparatus currently captured and the received electric field level of the adjacent base station apparatus are measured, and the measured base station apparatus is captured. If the received electric field level of the base station apparatus is lower than a predetermined threshold, the received electric field level of the captured base station apparatus is compared with the received electric field level of the adjacent base station apparatus, When performing base station switching processing (handoff processing) to be switched, based on communication area information included in information notified to the mobile station device 5 from an adjacent base station device that is a candidate for switching, the base station device Is determined to belong to the communication areas R1 and R2 desired by the mobile station apparatus 5. Then, the mobile station apparatus 5 performs switching (handoff) to the base station apparatus belonging to the desired communication area R1, R2.
Therefore, in the mobile station device 5 of this example, when performing handoff for switching the base station devices 3A to 3D, the mobile station device 5 can switch to the base station devices 3A to 3D corresponding to the desired communication areas R1 and R2.

A second embodiment of the present invention will be described.
In this example, detailed description of the same matters as those described in the first embodiment is omitted.
FIG. 5 shows an example of control channel number information for determining the surrounding zone included in the broadcast information of this example.
In this example, as information on the control channel number shown in FIG. 2, information (communication area information) for specifying the channel number (peripheral control channel number) and the communication areas R1 and R2 for the adjacent base station apparatuses 3A to 3D. Information corresponding to is used. Here, each base station apparatus 3A to 3D includes, for example, control channel numbers and communication area information related to other base station apparatuses adjacent to the base station apparatus (the respective base station apparatuses 3A to 3D) in the broadcast information.
Thereby, the mobile station apparatus 5 detects the control channel number and communication area information of the base station apparatus adjacent to the base station apparatuses 3A to 3D based on the broadcast information received from the base station apparatuses 3A to 3D. I can grasp it.

  In addition, as a method of grasping other base station apparatuses adjacent to each base station apparatus 3A to 3D, for example, information specifying other adjacent base station apparatuses is preset in each base station apparatus 3A to 3D. May be stored in the memory, or information specifying other adjacent base station devices is transmitted to the base station devices 3A to 3D from the command device 1 or the line control device 2 and stored in the memory. Alternatively, a mode may be used in which each base station device 3A to 3D communicates with other base station devices by radio or the like to identify adjacent base station devices.

FIG. 6 shows an example of the procedure of base station switching processing (handoff processing) performed by the mobile station apparatus 5 of this example.
The processes in steps S11, S12, S13, and S14 are the same as the processes in steps S1, S2, S3, and S4 shown in FIG.
Further, the processes of steps S16, S17, and S18 are the same as the processes of steps S5, S6, and S7 shown in FIG. 4, respectively.
Further, the processes of steps S19 and S20 are the same as the processes of steps S9 and S10 shown in FIG. 4, respectively.

  The mobile station apparatus 5 measures the received electric field level of the captured base station apparatus (step S11), measures the received electric field level of the adjacent base station apparatus (step S13), and acquires the acquired base station apparatus. When the received electric field level is lower than the threshold value (step S12), the received electric field level of the base station apparatus being captured is compared with the received electric field level of the adjacent base station apparatus (step S14).

  As a result of the above comparison, when the reception field level of the adjacent base station device is higher than the reception field level of the capturing base station device, the mobile station device 5 It is determined whether or not the communication areas R1 and R2 are communication areas desired by the own device (the mobile station device 5) (step S15). Here, the communication areas R1 and R2 of the adjacent base station apparatuses are specified based on the control channel number information in the broadcast information received from the captured base station apparatus.

When the communication areas R1 and R2 of the adjacent base station apparatuses are the desired communication areas (when both communication areas match), the mobile station apparatus 5 switches to the frequency of the base station apparatus ( Step S16) captures the base station device (Step S17), receives and acquires broadcast information from the base station device (Step S18), and transmits a location registration request to the base station device ( In step S19), the location registration permission transmitted from the base station apparatus is received (step S20), and the handoff process is completed.
Here, if the mobile station apparatus 5 is an adjacent base station apparatus that does not correspond to the desired communication areas R1 and R2 in the process of step S15, the mobile station apparatus 5 returns to the initial process (steps S11 and S13) again.

As described above, in the mobile station apparatus 5 of the present example, in the base station switching process (handoff process), the communication area included in the information notified from the currently captured base station apparatus to the mobile station apparatus 5 Based on the information, before switching to the frequency of the adjacent base station apparatus, it is determined whether or not the adjacent base station apparatus to be switched corresponds to the desired communication areas R1 and R2.
Therefore, in the mobile station device 5 of this example, it is possible to determine whether or not the adjacent base station device is a base station device corresponding to the desired communication area R1, R2 without switching the frequency. Thus, the processing efficiency can be improved.

A third embodiment of the present invention will be described.
In addition, in this example, detailed description is abbreviate | omitted about the matter similar to having demonstrated in above-mentioned 1st Example-2nd Example.
In this example, in the mobile station device 5, information in which the base station devices 3A to 3D and the communication areas R1 and R2 are associated is stored in advance in the memory.
Thereby, the mobile station apparatus 5 identifies the base station apparatuses 3A to 3D by the network numbers of the adjacent base station apparatuses 3A to 3D, for example, and the communication areas R1, R2 corresponding to the base station apparatuses 3A to 3D Is read from the memory, the communication areas R1 and R2 of the base station devices 3A to 3D can be detected.

In addition, as an example of the procedure of the base station switching process (handoff process) performed by the mobile station apparatus 5 of the present example, the same procedure as in FIG. 6 can be used.
In addition, information for identifying the communication areas R1 and R2 of the base station devices 3A to 3D is, for example, fixedly set in the mobile station device 5, but there is a change in the arrangement of the base station devices 3A to 3D For example, the setting contents may be changed as necessary.

As described above, in the mobile station apparatus 5 of this example, in the base station switching process (handoff process), the communication areas R1 and R2 desired by the adjacent base station apparatuses are set based on the communication area information set in advance. It is determined whether or not it corresponds.
Therefore, in the mobile station device 5 of this example, for example, it is determined whether the adjacent base station device is a base station device corresponding to the desired communication areas R1 and R2 without switching the frequency. Therefore, the processing efficiency can be improved.

A fourth embodiment of the present invention will be described.
In addition, in this example, detailed description is abbreviate | omitted about the matter similar to having demonstrated in above-mentioned 1st Example-3rd Example.
In this example, an example regarding setting of communication areas R1 and R2 desired by the mobile station device 5 is shown.

FIG. 7 shows an example of a correspondence between a district to which each mobile station device 5 belongs (or a district where each mobile station device 5 participates) and communication areas R1 and R2.
In the example of FIG. 7, the mobile station 1 and the district A correspond, the mobile station 2 and the district B correspond, the mobile station 3 and the district C correspond, and the mobile station 4 and the district D corresponds, and mobile station 5 and district E correspond. In addition, district A, district B, and district C are areas that control communication area 1 (in this example, communication area R1), and districts D and E have jurisdiction over communication area 2 (in this example, communication area R2). It is an area to do. That is, in this example, the mobile station 1, the mobile station 2, and the mobile station 3 desire the communication area 1, and the mobile station 4 and the mobile station 5 desire the communication area 2.

  In this example, information as shown in FIG. 7 is stored in advance in a storage device (for example, a memory) inside each mobile station device 5, for example. Each mobile station device 5 stores, for example, information for specifying the affiliation (or destination) district and communication area information for the own device (each mobile station device 5).

FIG. 8 shows an example of a procedure of base station switching processing (handoff processing) performed by the mobile station apparatus 5 of this example.
The processes in steps S22, S23, S24, and S25 are the same as the processes in steps S1, S2, S3, and S4 shown in FIG.
Further, the processes of steps S26, S27, and S28 are the same as the processes of steps S5, S6, and S7 shown in FIG. 4, respectively.
Further, the processes of steps S30 and S31 are the same as the processes of steps S9 and S10 shown in FIG. 4, respectively.

In this example, the internal storage device of the mobile station device 5 is set in advance to belong to a predetermined district (in this example, the district A) (or to make the district A the destination). (Step S21). Thereby, the mobile station apparatus 5 is set to switch preferentially, for example, to the communication areas R1 and R2 to which the own apparatus belongs (or is a destination).
The mobile station apparatus 5 measures the received electric field level of the captured base station apparatus (step S22), measures the received electric field level of the adjacent base station apparatus (step S24), and acquires the acquired base station apparatus. If the received electric field level is lower than the threshold value (step S23), the received electric field level of the base station apparatus being captured is compared with the received electric field level of the adjacent base station apparatus (step S25).

As a result of the above comparison, when the received electric field level of the adjacent base station device is higher than the received electric field level of the captured base station device, switching to the frequency of this adjacent base station device (step S26), The base station apparatus is captured (step S27), and broadcast information from the base station apparatus is received and acquired (step S28).
In the mobile station apparatus 5, the communication areas R1 and R2 of the switchable adjacent base station apparatuses correspond to the area A to which the own apparatus (the mobile station apparatus 5) belongs (or is a destination). It is determined whether it is a communication area (step S29).

As a result of this determination, when the communication areas R1 and R2 of the adjacent base station apparatuses are communication areas corresponding to the area A to which the own apparatus belongs (or is a destination) (when the communication areas of the two match) ), The mobile station device 5 transmits a location registration request to the base station device (step S30), receives the location registration permission transmitted from the base station device (step S31), and The handoff process is completed.
Here, when the mobile station apparatus 5 is an adjacent base station apparatus that does not correspond to the communication areas R1 and R2 of the district A to which the own apparatus belongs (or is a destination) in the process of step S29. Then, the process returns to the first received electric field measurement process (steps S22 and S24).

  In this example, the example applied to the case where the network number information as shown in FIG. 3 is used in the same manner as shown in FIG. 4 is shown, but another configuration example is shown in FIG. Similarly to the above, it may be applied when the information of the control channel number as shown in FIG. 5 is used.

As described above, in the mobile station device 5 of the present example, in the base station switching process (handoff process), the mobile station device 5 is configured based on the affiliation information (or destination information) set in advance. It is possible to switch to the base station devices 3A to 3D in the communication areas R1 and R2 corresponding to the district to which the user belongs (or the destination).
Accordingly, the mobile station device 5 of this example receives, for example, voice information sent to the communication areas R1 and R2 to which the own device belongs (or participates) and outputs the voice to a person. And so on.

A fifth embodiment of the present invention will be described.
In addition, in this example, detailed description is abbreviate | omitted about the matter similar to having demonstrated in above-mentioned 1st Example-3rd Example.
In this example, an example regarding setting of communication areas R1 and R2 desired by the mobile station device 5 is shown.

In this example, the mobile station device 5 has an operation unit that accepts input information including keys operated by a person (operator) and the like (or directly) The communication areas R1 and R2 may be manually set by a person.
As a specific example, a district A belonging to the mobile station device 5 such as a fire engine is set in advance, but when a person heads for support to another district B, a fire brigade member manually enters the mobile station device 5. There may be a case where a district B (a communication area corresponding to) is set.

FIG. 9 shows an example of the procedure of base station switching processing (handoff processing) performed by the mobile station apparatus 5 of this example.
The processes in steps S42, S43, S44, and S45 are the same as the processes in steps S1, S2, S3, and S4 shown in FIG.
Further, the processes of steps S46, S47, and S48 are the same as the processes of steps S5, S6, and S7 shown in FIG. 4, respectively.
Further, the processes of steps S50 and S51 are the same as the processes of steps S9 and S10 shown in FIG. 4, respectively.

In this example, an operator of the mobile station device 5 manually sets a district (in this example, referred to as district A) in which communication is performed with the mobile station device 5 (step S41). Thereby, the mobile station apparatus 5 is set to switch preferentially to a communication area (for example, communication area R1) corresponding to the set area A, for example.
The mobile station apparatus 5 measures the received electric field level of the captured base station apparatus (step S42), measures the received electric field level of the adjacent base station apparatus (step S44), and acquires the acquired base station apparatus. When the received electric field level is lower than the threshold value (step S43), the received electric field level of the base station apparatus being captured is compared with the received electric field level of the adjacent base station apparatus (step S45).

As a result of the above comparison, when the received electric field level of the adjacent base station device is higher than the received electric field level of the captured base station device, switching to the frequency of the adjacent base station device (step S46), The base station apparatus is captured (step S47), and broadcast information from the base station apparatus is received and acquired (step S48).
Then, the mobile station apparatus 5 determines whether or not the communication areas R1 and R2 of the adjacent base station apparatuses that can be switched are communication areas corresponding to the area A set in the own apparatus (the mobile station apparatus 5). Is determined (step S49).

As a result of this determination, if the communication areas R1 and R2 of the adjacent base station devices are communication areas corresponding to the area A set in the own device (when both communication areas match), the mobile station device 5 transmits a location registration request to the base station device (step S50), receives a location registration permission transmitted from the base station device (step S51), and completes the handoff process.
Here, if the mobile station apparatus 5 is an adjacent base station apparatus that does not correspond to the communication areas R1 and R2 of the area A set in the own apparatus in the process of step S49, the mobile station apparatus 5 again measures the first received electric field. It returns to a process (step S42, S44).

  In this example, the example applied to the case where the network number information as shown in FIG. 3 is used in the same manner as shown in FIG. 4 is shown, but another configuration example is shown in FIG. Similarly to the above, it may be applied when the information of the control channel number as shown in FIG. 5 is used.

As described above, in the mobile station device 5 of the present example, in the base station switching process (handoff process), the setting contents based on the manually set destination point information (district information in this example) Can be switched to the base station devices 3A to 3D in the communication areas R1 and R2.
Therefore, in the mobile station apparatus 5 of this example, for example, based on the manually set contents, the voice information sent to the desired communication areas R1, R2 is received, and the voice is output to the person. can do.

A sixth embodiment of the present invention will be described.
In addition, in this example, detailed description is abbreviate | omitted about the matter similar to having demonstrated in above-mentioned 1st Example-3rd Example.
In this example, an example regarding setting of communication areas R1 and R2 desired by the mobile station device 5 is shown.

In this example, the command device 1 sends information (district data) for specifying a district that the mobile station device 5 should be a destination to the mobile station device 5 via the line control device 2 and the base station devices 3A to 3D. To send. Based on the district data received from the command device 1, the mobile station device 5 sets a district where the own device (the mobile station device 5) participates, and switches to the communication areas R 1 and R 2 corresponding to the district. To.
The district data is transmitted from the command device 1 to each mobile station device 5, for example.

  As a specific example, a district A belonging to the mobile station device 5 such as a fire engine is set in advance, but a person (commander) supports the mobile station device 5 from the command device 1 to another district B. When instructing to go to the mobile station device 5, it is possible to transmit the district data so as to set the district B (corresponding communication area) to the mobile station device 5.

FIG. 10 shows an example of the procedure of base station switching processing (handoff processing) performed by the mobile station device 5 of this example.
Note that the processes of steps S63, S64, S65, and S66 are the same as the processes of steps S1, S2, S3, and S4 shown in FIG. 4, respectively.
Further, the processes in steps S67, S68, and S69 are the same as the processes in steps S5, S6, and S7 shown in FIG.
Further, the processes of steps S71 and S72 are the same as the processes of steps S9 and S10 shown in FIG. 4, respectively.

  In this example, the mobile station device 5 receives the district data transmitted from the command device 1 (step S61), and based on the received district data, the district to be a destination (in this example, the district A) A communication area (for example, communication area R1) corresponding to is set (step S62). Thereby, the mobile station apparatus 5 is set to switch preferentially to the communication area R1 corresponding to the set area A, for example.

  The mobile station apparatus 5 measures the received electric field level of the captured base station apparatus (step S63), measures the received electric field level of the adjacent base station apparatus (step S65), and acquires the acquired base station apparatus. If the received electric field level is lower than the threshold value (step S64), the received electric field level of the base station apparatus being captured is compared with the received electric field level of the adjacent base station apparatus (step S66).

As a result of the above comparison, when the received electric field level of the adjacent base station device is higher than the received electric field level of the captured base station device, switching to the frequency of the adjacent base station device (step S67), The base station apparatus is captured (step S68), and broadcast information from the base station apparatus is received and acquired (step S69).
Then, the mobile station apparatus 5 determines whether or not the communication areas R1 and R2 of the adjacent base station apparatuses that can be switched are communication areas corresponding to the area A set in the own apparatus (the mobile station apparatus 5). Is determined (step S70).

As a result of this determination, if the communication areas R1 and R2 of the adjacent base station devices are communication areas corresponding to the area A set in the own device (when both communication areas match), the mobile station device 5 transmits a location registration request to the base station device (step S71), receives a location registration permission transmitted from the base station device (step S72), and completes the handoff process.
Here, if the mobile station apparatus 5 is an adjacent base station apparatus that does not correspond to the communication areas R1 and R2 of the area A set in the own apparatus in the process of step S70, the mobile station apparatus 5 performs the first received electric field measurement again. Return to the processing (steps S63, S65).

  In this example, the example applied to the case where the network number information as shown in FIG. 3 is used in the same manner as shown in FIG. 4 is shown, but another configuration example is shown in FIG. Similarly to the above, it may be applied when the information of the control channel number as shown in FIG. 5 is used.

As described above, in the mobile station device 5 of the present example, a destination point is set based on the district data received from the commanding device 1, and the base point switching process (handoff process) determines the set destination point. Based on the information (in this example, information on the district), it is possible to switch to the base station devices 3A to 3D in the communication areas R1 and R2 corresponding to the set content.
Therefore, in the mobile station device 5 of this example, for example, based on the contents set by the command from the command device 1, the voice information sent to the desired communication areas R1 and R2 is received and sent to the person. On the other hand, voice output can be performed.

A seventh embodiment of the present invention will be described.
In addition, in this example, detailed description is abbreviate | omitted about the matter similar to having demonstrated in above-mentioned 1st Example-6th Example.
In this example, the mobile station device 5 switches between a preferential mode and a fixed mode as a mode of switching (handoff) to the base station devices 3A to 3D corresponding to the desired communication areas R1 and R2. It has a function.
As a configuration for performing such priority or fixed switching, for example, a configuration in which a person (operator) manually operates an operation unit of the mobile station device 5 and inputs an instruction, or an external A configuration that is performed based on instruction information received from the commanding device 1 or the like can be used.

  Here, the mobile station apparatus 5 is configured to perform switching (handoff) to the base station apparatuses 3A to 3D corresponding to the desired communication areas R1 and R2. The base station apparatus corresponding to the desired communication area R1 or R2 is searched for among the adjacent base station apparatuses that can be switched to the base station apparatus that is captured in the above, but such an adjacent base station apparatus is found. If not, switching is performed to a switchable adjacent base station apparatus that does not correspond to the desired communication areas R1 and R2.

  On the other hand, if the mobile station device 5 is set as a mode for switching (handoff) to the base station devices 3A to 3D corresponding to the desired communication areas R1 and R2, the mode to be fixed is currently set. A search is made for a base station device corresponding to the desired communication area R1, R2 among adjacent base station devices that can be switched to the captured base station device, but such an adjacent base station device is not found. When the base station apparatus is switched, the base station apparatus is not switched.

  In addition, when the mobile station apparatus 5 searches for a base station apparatus corresponding to the desired communication area R1, R2, various conditions are used as conditions for determining that such an adjacent base station apparatus is not found. For example, a mode in which it is determined that a desired adjacent base station apparatus has not been found when all the adjacent base station apparatuses that are candidates have been searched but not found, or a predetermined preset For example, it is possible to use a mode in which it is determined that a desired adjacent base station apparatus has not been found when a search is performed for a time (timeout period) and the search is not found.

FIG. 11 shows the base station performed by the mobile station device 5 of this example when the mobile station device 5 of this example switches (hands off) preferentially to the base station device corresponding to the desired communication area R1, R2. An example of the procedure of station switching processing (handoff processing) is shown.
The processes in steps S81, S82, S83, and S84 are the same as the processes in steps S1, S2, S3, and S4 shown in FIG.
Further, the processes of steps S85, S86, S87, and S88 are the same as the processes of steps S5, S6, S7, and S8 shown in FIG.
Further, the processes of steps S90 and S91 are the same as the processes of steps S9 and S10 shown in FIG. 4, respectively.

  The mobile station apparatus 5 measures the received electric field level of the captured base station apparatus (step S81), measures the received electric field level of the adjacent base station apparatus (step S83), and acquires the acquired base station apparatus. When the received electric field level is lower than the threshold (step S82), the received electric field level of the base station apparatus being captured is compared with the received electric field level of the adjacent base station apparatus (step S84).

As a result of the above comparison, when the received electric field level of the adjacent base station device is higher than the received electric field level of the captured base station device, switching to the frequency of this adjacent base station device (step S85), The base station apparatus is captured (step S86), and broadcast information from the base station apparatus is received and acquired (step S87).
Then, the mobile station apparatus 5 determines whether the communication areas R1 and R2 of the switchable adjacent base station apparatuses are communication areas desired by the own apparatus (the mobile station apparatus 5) (step S88). ).

  As a result of the determination, when the communication areas R1 and R2 of the adjacent base station apparatuses are communication areas desired by the own apparatus (when both communication areas match), the mobile station apparatus 5 A location registration request is transmitted to the device (step S90), the location registration permission transmitted from the base station device is received (step S91), and the handoff process is completed.

  On the other hand, if the mobile station device 5 is an adjacent base station device that does not correspond to the communication areas R1 and R2 desired by the own device in the process of step S88, all the channels (for example, all candidate channels) It is determined whether or not a search has been made for an adjacent base station device (step S89). If the search has not yet been completed for all channels, the frequency is switched to the frequency of the base station device currently captured. Then, the process returns to the first received electric field measurement process (steps S81 and S83), and the same process as described above is performed for the other adjacent base station apparatuses.

  In addition, as a result of the above determination, if all the channels are searched but the desired adjacent base station apparatus is not found, the adjacent electric field level higher than the received electric field level of the capturing base station apparatus There is no base station apparatus corresponding to the desired communication area (step S92), and the mobile station apparatus 5 switches to an adjacent base station apparatus that does not correspond to the desired communication area but can be switched. Perform (handoff). Specifically, the mobile station apparatus 5 switches to a frequency of an adjacent base station apparatus that can be switched (step S93), captures the base station apparatus (step S94), and receives broadcast information from the base station apparatus. (Step S95), a location registration request is transmitted to the base station device (step S96), a location registration permission transmitted from the base station device is received (step S97), and handoff is performed. Complete processing.

  In this example, the example applied to the case where the network number information as shown in FIG. 3 is used in the same manner as shown in FIG. 4 is shown, but another configuration example is shown in FIG. Similarly to the above, it may be applied when the information of the control channel number as shown in FIG. 5 is used.

As described above, in the mobile station device 5 of this example, communication is performed by switching (handoff) preferentially to the base station devices 3A to 3D corresponding to the set communication areas R1 and R2, or set. It is possible to switch whether to communicate by performing a fixed switch (handoff) to only the base station devices 3A to 3D corresponding to the communication areas R1 and R2.
Therefore, in the mobile station apparatus 5 of this example, when performing priority switching, it is possible to perform switching to a base station apparatus corresponding to a communication area different from the desired communication areas R1 and R2. For example, the mobile station device 5 can be prevented from going out of service. In the mobile station device 5 of this example, when fixed switching is performed, switching to a base station device corresponding to a communication area other than the desired communication areas R1 and R2 cannot be performed. Communication can be prohibited.

An eighth embodiment of the present invention will be described.
In addition, in this example, detailed description is abbreviate | omitted about the matter similar to having demonstrated in above-mentioned 1st Example-7th Example.
In this example, when the mobile station device 5 cannot capture the base station devices 3A to 3D corresponding to the desired communication areas R1 and R2 by its own device (the mobile station device 5), the mobile station device 5 Transition to the direct communication mode, search for another mobile station device that can communicate directly, and if such other mobile station device is found, between the other mobile station device Communicate wirelessly.

  Note that, in the aspect of this example, when the base station devices 3A to 3D corresponding to the desired communication areas R1 and R2 are not found, the fixed switching is not performed to the base station device corresponding to another communication area. It can also be considered as an aspect of switching.

The mobile station direct communication mode will be described with reference to FIG.
FIG. 12 shows a base station apparatus 11, an individual communication area 12 of the base station apparatus 11, and a mobile station apparatus 21 that exists in the individual communication area 12 and captures the base station apparatus 11 as a communication partner. The mobile station apparatus 22 which is not captured by any base station apparatus is shown.
Here, for example, the mobile station device 22 does not exist in any individual communication area of any base station device, or the base station device corresponding to the desired communication area R1, R2 cannot be found. None of the base station devices are captured.

The mobile station apparatus 21 that has captured the base station apparatus 11 performs radio communication with the base station apparatus 11 using the frequency f1 used by the base station apparatus 11 and, for example, has a predetermined cycle. At such timing, it is detected whether there is another mobile station device that requests direct communication between mobile stations by using the frequency f2 for direct communication between mobile stations (different from the frequency f1).
On the other hand, the mobile station device 22 that has not been captured by any base station device wirelessly transmits a signal requesting direct communication between mobile stations using the frequency f2 for direct communication between mobile stations.

  When the mobile station device 21 that has captured the base station device 11 receives a request signal for direct communication between mobile stations wirelessly transmitted from another mobile station device 22, the response signal for this is sent to the other mobile station device 21. By wirelessly transmitting to the mobile station device 22, direct communication between the mobile stations is performed between the two mobile station devices 21 and 22 using the frequency f 2. This communication can be thought of as, for example, a transceiver function.

As described above, in the mobile station device 5 of this example (in FIG. 12, for example, the mobile station device 22), for example, the search for the base station device corresponding to the desired communication areas R1 and R2 fails and is captured. If it is not possible, the mobile station direct communication mode is entered to search for a partner (another mobile station apparatus) that performs direct communication between mobile stations.
Therefore, when the mobile station apparatus 5 of this example cannot acquire the base station apparatus corresponding to the desired communication areas R1 and R2, another mobile station apparatus (in FIG. 12, for example, the mobile station apparatus 21). For example, voice information transmitted from the command device 1 to the other mobile station device can be received and acquired from the other mobile station device. It is.

A ninth 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. 13 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 department 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. 13 are provided, and one of the systems is operated and the other system is kept in a standby state, 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. 14 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 in-vehicle 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 through the antenna 71, and the key operation unit 73 receives a key operation from a person (user). The display unit 74 displays information for 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.

A tenth embodiment of the present invention will be described.
In this example, a description will be given of a configuration in which a base station device that is a transition destination (handoff destination) of a mobile station device is manually selected in a digital radio system that uses the TDMA scheme.
Various mobile station devices may be used. For example, a portable device, a portable device, a fixed device, a semi-fixed device, or the like can be used.

  In this example, the base station apparatus notifies the mobile station apparatus of the frequency information of the neighboring base station apparatus (neighboring base station apparatus) adjacent to the own station apparatus (the relevant base station apparatus) by the broadcast information and the system information. . The mobile station apparatus detects its own reception level and surrounding zone reception level based on the information notified from the base station apparatus, and determines level degradation or the like.

Here, in the background art, the shift (handoff) of the base station apparatus by the mobile station apparatus is automatically performed so as to shift to a base station apparatus having a higher reception level.
However, in such a background art, since the base station device captured by the mobile station device cannot be selected by a person (operator), for example, it is operated in a different communication case for each base zone by dedicated channel communication or the like. In such a case, there may occur a problem that the mobile station apparatus automatically shifts to an unintended base station apparatus. Also, in places where the reception level is unstable, such as at the boundary of a base zone, there is a problem that the mobile station device frequently shifts the base station device, and the communication quality deteriorates during communication. obtain.

In this example, a configuration of a mobile station apparatus that can solve such a problem is shown.
FIG. 16 shows an example of a narrowband digital mobile communication system using the TDMA system.
The digital mobile communication system of this example includes a control station device (command device) 101 and a plurality of mobile station devices 102a to 102e and 103a to 103c.
Examples of mobile station apparatuses include in-vehicle mobile station apparatuses 102a to 102e mounted on vehicles such as automobiles, and portable mobile station apparatuses 103a to 103c carried by people. It may be applied to any mobile station apparatus.

The control station apparatus 101 includes a base station apparatus 121 and a control table (or extension telephone or the like) 111 that controls the base station apparatus.
The base station device 121 includes a control device 112 that performs control, a wireless device 113 that performs wireless communication, a reception antenna 114, and a transmission antenna 115.
FIG. 16 shows a base zone (in this example, an individual communication area) 131 of the base station apparatus 121.

FIG. 17 shows an example of a state of base station device transition (handoff) by the mobile station device.
Specifically, four base station apparatuses 121A, 121B, 121C, and 121D, base zones 131A to 131D of the respective base station apparatuses 121A to 121D, and a mobile station apparatus 122 (for example, the mobile station shown in FIG. 16) Devices 102a-102e, 103a-103c).
Each of the base station devices 121A to 121D notifies the mobile station device 122 of frequency information (peripheral base station information) 141A to 141D of neighboring base station devices adjacent to the own station by broadcast information and system information. . Based on the information, the mobile station device 122 determines a base station device to move to next, and automatically switches position registration. For example, the mobile station device 122 in communication automatically switches the base station device and continues communication without disconnecting the communication.

FIG. 18 shows an example of a situation near the boundary of the base zone.
Specifically, the case where the mobile station device 122a and the mobile station device 122b exist near the boundary between the base zone 131A of the base station device 131A and the base zone 131B of the base station device 121B is shown.
In this case, near the boundary of the base zone, the radio frequency fA used by the base station apparatus 121A and the radio frequency fB used by the base station apparatus 121B are congested.

  Normally, the mobile station device 122b periodically detects the reception level from the capturing base station device 121A and the reception level from the neighboring base station device 121B, and from the capturing base station device 121A. When the reception level decreases, the base station apparatus moves to another base station apparatus (in this example, the base station apparatus 121B) with a higher reception level.

On the other hand, for example, in the mobile station device 122a selected to capture the base station device 121A as the base station device to capture, even if the reception level from the capturing base station device 121A decreases, Continue to capture the base station device 121A.
In this example, the operator of the mobile station apparatus 122a can manually instruct the base station apparatus to be captured by the mobile station apparatus 122a by operating the operation unit of the mobile station apparatus 122a.

FIG. 19 shows an example of a processing procedure for determining the transition (handoff) of the base station apparatuses 121A to 121D by the mobile station apparatus 122 of this example.
The mobile station device 122 periodically detects the reception level from the captured base station device and the reception level from the neighboring base station devices (step S201).
The mobile station apparatus 122 determines whether or not the base station apparatus to be captured is selected and set (step S202). If the base station apparatus to be captured is set, the mobile station apparatus 122 captures it at the present time. A connection with the existing base station apparatus (here, the base station apparatus to be captured) is maintained (step S206).

On the other hand, when the base station device to be captured is not set in the mobile station device 122, the mobile station device 122 determines whether the reception level from the captured base station device has deteriorated below a predetermined threshold, for example. (Step S203), and if not deteriorated, the connection with the base station apparatus currently captured is maintained (step S206).
When the reception level from the captured base station apparatus deteriorates, the mobile station apparatus 122 determines whether there is a peripheral base station apparatus that can be migrated (step S204). In step S205, a process of shifting to the neighboring base station apparatus (performing handoff) is executed. On the other hand, when there is no peripheral base station apparatus that can be migrated, the mobile station apparatus 122 maintains a connection with the currently captured base station apparatus (step S206).

FIG. 20 shows an example of a processing flow in which the operator manually selects and sets a base station device to be captured with respect to the mobile station device 122.
(1) The mobile station apparatus 122 has captured the base station apparatus 121A, always measures (detects) the reception level from the base station apparatus 121A, and is notified by broadcast information from the base station apparatus 121A. The reception level from the neighboring base station devices (in this example, the base station devices 121B and 121C) is measured based on the neighboring base station information.

Here, FIG. 21 shows an example of a peripheral base station table stored in a memory included in the mobile station device 122.
In the peripheral base station table of this example, a base station number that is information for identifying each base station apparatus 121A to 121D, a radio frequency used by each base station apparatus 121A to 121D, and each base station apparatus 121A to 121D. The reception level from is associated.
In the peripheral base station table, information related to the peripheral base station device is stored. For example, information related to the captured base station device may be stored together.

(2) An operator (user) operates the operation unit of the mobile station device 122 to request display of a list of surrounding base stations.
(3) Then, the mobile station device 122 displays a list of base station devices that can be migrated on the display unit of the mobile station device 122. In the mobile station apparatus 122 of this example, based on the information regarding the held base station apparatus, a list of base station apparatuses that can be transferred is displayed on the display unit in descending order of reception level.

Here, FIGS. 22A and 22B show display examples of a list of base stations.
FIG. 22A shows an example of the display area 151 of the display unit when a handset is used.
In this example, since the display area 151 is small, information on one base station device (reception sensitivity indicating the base station device number and reception level) is displayed on one screen, and the information is displayed one by one by key operation by the operator. Can be switched to display information on the base station apparatus or the previous base station apparatus. Here, the arrangement order of the information regarding the plurality of base station apparatuses is the order of the reception level.

FIG. 22B shows an example of the display area 152 when the operation display is used.
In this example, information on a plurality of base station devices (base station device numbers and reception levels) is displayed on one screen. Here, the arrangement order of the information regarding the plurality of base station apparatuses is the order of the reception level. In this example, the higher reception level is displayed on the upper side of the screen.

(4) The operator selects a base station device desired to be captured from the list-displayed base station devices, and gives an instruction to the mobile station device 122.
(5) The mobile station device 122, for example, fixedly captures the base station device (for example, the base station device 121B) selected by the operator based on the given instruction, and corresponds to the base station device. The frequency to be used is switched to be used for wireless communication, and location registration is requested to the base station apparatus. Thereby, the mobile station apparatus 122 captures the base station apparatus.

Here, in this example, the operator operates the operation unit of the mobile station device 122 and displays information on the display unit of the mobile station device 122. However, as another configuration example, An operation unit and a display unit are provided in the control station device 101 and the like that communicate with each other via the base station devices 121A to 121D, and an operator operates the operation unit in the control station device 101 and the like. It is also possible to use a configuration for displaying on the display unit.
Further, a touch panel display screen having both functions of the operation unit and the display unit may be used.

As described above, in this example, the base station apparatuses 121A to 121D that are the transfer destinations of the mobile station apparatus 122 can be manually selected and set by the operator.
In this example, the operator (user) of the mobile station device 122 can manually display the operation unit to display a list of base station devices that can be transferred. Information such as a received input electric field (reception level) necessary for the operator to determine the base station apparatus to be transferred to is displayed.

  Therefore, in this example, it is possible to manually select a base station device to be captured by the mobile station device 122, for example, when operating in a different communication case for each base zone by dedicated channel communication or the like. In addition, since the base station apparatus captured by the mobile station apparatus 122 can be fixed, it is possible to prevent the mobile station apparatus 122 from shifting to an unintended base station apparatus. Further, for example, when the mobile station device 122 exists near the boundary of the base zone, it is possible to prevent frequent handoff during communication by fixing the base station device to be captured.

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.
Further, the present invention can be grasped as a computer-readable recording medium such as a floppy (registered trademark) disk or a CD (Compact Disc) -ROM storing the control program, or 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 radio | wireless communications system which concerns on one Example of this invention. It is a figure which shows an example of alerting | reporting information. It is a figure which shows an example of the network number in alerting | reporting information. It is a figure which shows an example of the procedure of the base station switching process which concerns on 1st Example of this invention. It is a figure which shows an example of the control channel number in alerting | reporting information. It is a figure which shows an example of the procedure of the base station switching process which concerns on 2nd Example of this invention. It is a figure which shows an example of a response | compatibility with an affiliation or a participation place, and a communication area. It is a figure which shows an example of the procedure of the base station switching process which concerns on 4th Example of this invention. It is a figure which shows an example of the procedure of the base station switching process which concerns on 5th Example of this invention. It is a figure which shows an example of the procedure of the base station switching process which concerns on 6th Example of this invention. It is a figure which shows an example of the procedure of the base station switching process which concerns on 7th Example of this invention. It is a figure which shows an example of the direct communication between mobile station apparatuses. 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. It is a figure which shows an example of the procedure of a base station switching process. It is a figure which shows an example of the digital mobile communication system of the narrow band which uses the TDMA system based on 10th Example of this invention. It is a figure which shows an example of the mode of operation | movement of the transfer (handoff) of the base station apparatus by a mobile station apparatus. It is a figure which shows an example of the mode of the boundary vicinity of a base zone. It is a figure which shows an example of the procedure of the process which determines the transfer (handoff) of a base station apparatus by a mobile station apparatus. It is a figure which shows an example of the flow of a process which an operator selects and sets the base station apparatus which should be captured with respect to a mobile station apparatus manually. It is a figure which shows an example of the periphery base station table memorize | stored in a mobile station apparatus. It is a figure which shows the example of a display of a base station list.

Explanation of symbols

1, 31 .. Command device, 2, 32 .. Line control device, 3A to 3D, 11, G1 to Gn .. Base station device, 4A to 4D, 12 .. Individual communication area, R1, R2 .. Communication area 5, 21, 22, I1-Im ··· mobile station device, 41 ·· operation unit, 42, 64, 74 ·· display unit, 43 ·· storage unit, 51 ·· vehicle-mounted device, 52 ·· portable device, 53..Place, H1-Hn..Remote controller 61, 71..Antenna 62.72..Radio unit 63.73..Key operation unit 65.75..Mic unit 66.76.・ Speaker part, 67, 77 ・ ・ Memory, 68 ・ ・ Portable interface, 69, 79 ・ ・ Control part, 78 ・ ・ In-vehicle interface,
101 ··· Control station device, 102a to 102e, 103a to 103c, 122, 122a, 122b ··· Mobile station device, 111 ··· Control table, 112 ··· Control device, 113 ··· Wireless device, ············ 115 ··· Transmitting antenna, 121, 121A to 121D ··· Base station device, 131, 131A to 131D ··· Base zone, 141A to 141D · · Neighboring base station information, 151, 152 ··· Display area,

Claims (3)

In a mobile station device that communicates wirelessly with a base station device,
A determination unit that determines whether or not a base station device that is a candidate of a communication partner forms the communication area, based on information that identifies a communication area in which the own device is required to move;
A control unit that executes processing for setting the base station device as a communication partner when the determination unit determines that a base station device that is a candidate for the communication partner forms the communication area;
A mobile station apparatus comprising: In the mobile station apparatus of Claim 1,
Comprising input means for inputting information for identifying a communication area in which the device is required to move from the outside;
A mobile station apparatus. In the mobile station apparatus of Claim 1 or Claim 2,
Search means for making a determination by the determination means to search for a base station device as a communication partner,
When the search by the search unit fails, the control unit shifts to a mode for executing a process of directly communicating with another mobile station device.
A mobile station apparatus.

Images