JP2006173925A - Base station device and mobile communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple base station device and a mobile communication system that can link a mobile communication terminal such as an existent mobile telephone with information equipment such as a personal computer and a car navigation device through radio communication. <P>SOLUTION: The simple base station 100 includes an interface section 111 where a PC (information equipment) 1 is connected, a base station communication block 101 functioning as a simple base station for a mobile communication terminal 2, and a terminal communication block 102 receiving a signal from a base station 3 on a mobile communication network. Then data stored in the PC 1 are transmitted to the mobile communication terminal 2 through the base station communication block 101. Incoming information from the mobile communication network to the mobile communication terminal 2 is received from the base station 3 through the terminal communication block 102 and reported to the mobile communication terminal 2 through the base station communication block 101. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a base station and a mobile communication system capable of linking a mobile communication terminal such as a mobile phone and an information device such as a personal computer or a car navigation system by wireless communication.

  Conventionally, when data is transmitted / received between an information device such as a personal computer or a car navigation system and a mobile phone, a method of connecting both using a dedicated serial cable or a method using a memory card as a medium is known. It has been. In addition, as a method that does not require a cable or a memory card, there is a mobile phone having a short-range wireless communication function such as infrared communication, and it is also possible to connect using this wireless communication function.

On the other hand, a mobile in-vehicle communication device consisting of a simple base station, centralized control device, and wireless device is installed in the train car, and data stored in the centralized control device for inquiries regarding the operation status of transportation facilities from mobile terminals 2. Description of the Related Art A mobile information communication system that detects and responds to necessary data is known (for example, see Patent Document 1). In this system, when information such as a timetable is desired at a mobile terminal in a train, the necessary information is obtained from a database via a simple base station. Inquiries are made to a fixed base station connected to the operation management department of a transportation facility through a wireless device, and corresponding answer information is obtained and answered to a portable terminal.
JP 2000-332673 A

  However, when an information device such as a personal computer or a car navigation system is connected to a mobile phone to transmit / receive data, a dedicated cable may not be prepared suddenly. In addition, the method using a memory card is troublesome in that data communication must be performed by inserting and removing the memory card. Furthermore, when using short-range wireless communication, since it is assumed that the mobile terminal has a short-range wireless communication function, the circuit configuration of the mobile terminal becomes complicated and the cost increases. There is.

  On the other hand, in the mobile information communication system of Patent Document 1, a mobile terminal can be used as it is, but when such a simple base station is placed in an existing mobile communication network, There is a possibility that the communication state of the mobile terminal of the other user will be worsened and adverse effects such as the inability to make and receive calls with normal base stations will be possible. In addition, there is a problem that a mobile terminal that is in the range of a simple base station cannot normally receive an incoming call from a fixed base station.

  The present invention has been made in view of such circumstances, and a base station apparatus capable of establishing a wireless communication link between an existing mobile communication terminal such as a mobile phone and an information device such as a personal computer or a car navigation system, and An object is to provide a mobile communication system.

The present invention has been made to solve the above-mentioned problems, and the invention according to claim 1 is a first means for receiving a signal from a connection means for connecting information equipment and a fixed base station of a mobile communication network. Wireless communication means, second wireless communication means for communicating with the mobile communication terminal, and call information addressed to the mobile communication terminal from the fixed base station received by the first wireless communication means, First information transfer means for transferring to the portable communication terminal by two wireless communication means, and information in the information device read via the connection means to the portable communication terminal by the second wireless communication means. And a second information transfer means for transferring.
As a result, a wireless communication link can be established between an existing mobile communication terminal such as a mobile phone and an information device such as a personal computer or a car navigation system, and information in the information device can be easily taken into the mobile communication terminal. it can.

The invention according to claim 2 is used in the fixed base stations in the vicinity of the simple base station according to claim 1 by a signal from the fixed base station received by the first wireless communication means. Neighboring base station information obtaining means for obtaining neighboring base station information including a base station transmission frequency, and parameters necessary for communication between the second wireless communication means and the portable communication terminal based on the neighboring base station information Communication setting processing means for performing setting.
As a result, a frequency other than the base station transmission frequency used in the surrounding fixed base stations can be set as a parameter necessary for communication with the mobile communication terminal. Setting processing with the communication terminal can be reliably performed.

The invention according to claim 3 is the simplified base station according to claim 1 or claim 2, wherein the second wireless communication means performs transmission with a transmission power equal to or less than a predetermined value, and has a limited range. It is configured to be able to communicate with the mobile communication terminal only in the space.
As a result, a simple base station device area can be created within a predetermined small range, and the link between the information device and the mobile communication terminal can be made locally without affecting other mobile communication terminals or fixed base stations. Can be done.

According to a fourth aspect of the present invention, there is provided a communication system in which the fixed base station of the mobile communication network controls transmission power of the portable communication terminal in the simple base station according to any one of the first to third aspects. In this case, the mobile communication terminal includes transmission power control means for controlling the transmission power of the mobile communication terminal to a predetermined value or less.
As a result, a simple base station device area can be created within a predetermined small range, and the link between the information device and the mobile communication terminal can be made locally without affecting other mobile communication terminals or fixed base stations. Can be done.

The invention according to claim 5 is composed of a mobile communication terminal, a fixed base station of a mobile communication network, and a base station device that transfers incoming call information from the fixed base station to the mobile communication terminal. In the mobile communication system, the base station device communicates with a connection means for connecting information equipment, a first wireless communication means for receiving a signal from the fixed base station, and a mobile communication terminal. The second wireless communication means and the second wireless communication means transfer the incoming call information addressed to the portable communication terminal from the fixed base station received by the first wireless communication means to the portable communication terminal. 1 information transfer means, and second information transfer means for transferring information in the information device read out through the connection means to the portable communication terminal by the second wireless communication means, The communication terminal is the base station device When entering the distance, characterized in that it comprises a base station switching means for switching the base station waiting a predetermined condition from the fixed base station to the base station apparatus.
As a result, a wireless communication link can be established between an existing mobile communication terminal such as a mobile phone and an information device such as a personal computer or a car navigation system, and information in the information device can be easily taken into the mobile communication terminal. it can.

The invention according to claim 6 is the mobile communication system according to claim 5, wherein the portable communication terminal switches a standby base station from a fixed base station to the base station device of the mobile communication network. In this case, both the fixed base station and the base station apparatus are configured as standby base stations.
Thereby, in the mobile communication terminal, signals can be received from both the simple base station apparatus and the base station of the mobile communication network, and the convenience for the user is improved. For example, in the case of a hybrid portable communication terminal or the like that can perform voice communication and data communication, the voice communication can be left in the mobile communication network, and the data communication can be switched to a simple base station apparatus.

The invention according to claim 7 is the mobile communication system according to claim 5, wherein the mobile communication terminal is configured to be able to select one of two communication modes, a call mode and a data communication mode, When the data communication mode is selected, handoff to the base station apparatus is performed, and when the call mode is selected, a signal from a fixed base station of the mobile communication network is waited for.
Thereby, the data communication mode and the call mode can be arbitrarily selected, and the convenience of the user of the mobile communication terminal is improved.

  According to the present invention, there is an effect that an existing mobile communication terminal such as a mobile phone and an information device such as a personal computer or a car navigation system can be easily linked by wireless communication.

<First Embodiment>
Hereinafter, a base station apparatus and a mobile communication system according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a configuration of the embodiment. In FIG. 1, 1 is a PC (personal computer) as an information device, 100 is a simple base station (base station apparatus) connected to the PC 1, 2 and 2a are portable communications such as a mobile phone that communicates with the simple base station 100 Terminals 3 are mobile communication network base stations (fixed base stations). Although FIG. 1 shows an example of a PC (personal computer) 1 as an information device, the information device is not limited to a PC, and may be an information device such as a car navigation system. The mobile communication terminals 2 and 2a indicate a case where there are a plurality of mobile communication terminals under the simple base station 100, and there may be a plurality of base stations 3.

  The PC 1 is connected to the simple base station 100, and the simple base station 100 transmits pilot signals, control information, and the like to the mobile communication terminal 2 with transmission power equal to or less than a predetermined value. When the mobile communication terminal 2 selects the simple base station mode by a user operation or the like and registers the address of the PC 1 for the simple base station 100, the communication path with the simple base station 100 is established and stored in the PC 1. Information etc. can be acquired.

  The simple base station 100 is configured such that the frequency used here is automatically set to a frequency not used by the base station 3 of the normal mobile communication network. For example, in the case of the CDMA system, etc. The communication frequency is the same as that of the existing base station 3, and the PN number or the like is changed to distinguish it from the surrounding base stations 3. This communication frequency may be arbitrarily set by the user. In the following description, it is assumed that a frequency different from the communication frequency used in the base station 3 is used as the communication frequency between the simple base station 100 and the mobile communication terminal 2.

  Next, the configuration of the simplified base station 100 shown in FIG. 1 will be described with reference to FIG. FIG. 2 is a block diagram showing a configuration of the simple base station 100. As shown in FIG. The simple base station 100 realizes a function as a normal base station and communicates with a base station communication block (second wireless communication means) 101 that communicates with the mobile communication terminal 2 and a base station 3 of a mobile communication network. A terminal communication block (first wireless communication means) 102 for performing, a storage unit 109, a display unit 110, an interface unit (connection means) 111, and a control unit 120 are configured. The base station communication block 101 includes a wireless unit 104, a baseband unit 105, and an antenna 103 as a communication function for a simple base station for communicating with the mobile communication terminal 2. The terminal communication block 102 includes a wireless unit 107, a baseband unit 108, and an antenna 106 as terminal communication functions for communicating with the base station 3. The control unit 120 stores programs for realizing various functions of the simplified base station 100 in cooperation with hardware such as the base station communication block 101 and the terminal communication block 102.

  The simple base station 100 is connected to an information device such as the PC 1 through the interface unit 111. The terminal communication block 102 only performs reception to acquire surrounding base station information and does not perform transmission. The control unit 120 of the simple base station 100 determines simple base station information such as a transmission channel and a PN number used by the simple base station 100 based on the neighboring base station information acquired through the terminal communication block 102, and the display unit 110 To display.

  In the mobile communication terminal 2, the user inputs channel information and sets the simple base station mode. Apart from this, in the case of the CDMA system, the simplified base station 100 uses the same transmission channel as the surroundings, changes the PN number, and does not set the channel in the mobile communication terminal 2 and performs pilot signal search. The simple base station 100 may be configured to be detected by a normal operation.

An incoming call information transfer processing unit (first information transfer unit) 121 in the control unit 120 receives incoming call information addressed to the mobile communication terminal 2 from the base station 3 of the mobile communication network received by the terminal communication block 102. The data is transferred to the mobile communication terminal 2 through the base station communication block 101. The data download processing unit (second information transfer unit) 122 transmits the data in the PC 1 read through the interface unit 111 to the mobile communication terminal 2 through the base station communication block 101. The mobile communication terminal registration processing unit 123 accepts access from the mobile communication terminal 2 to the simple base station 100 and registers in the simple base station 100. The communication setting processing unit (communication setting processing means) 124 sets parameters necessary for communication between the base station communication block 101 of the simple base station 100 and the mobile communication terminal 2 (peripheral base station information) based on the peripheral base station information. Among these parameters, the user operates the mobile communication terminal 2 and is necessary for communication between the base station communication block 101 and the mobile communication terminal 2. Processing for displaying information necessary for parameter setting on the display unit 110 is performed. The transmission power control processing unit (transmission power control means) 125 transmits the mobile communication terminal 2 from the simple base station 100 when the base station 3 of the mobile communication network performs transmission power control of the mobile communication terminal 2. A process of controlling the power to a predetermined value or less is performed.
The simple base station search information may be transmitted to the mobile communication terminal 2 by the base station communication block 101.

  FIG. 3 is a block diagram showing a configuration of the mobile communication terminal 2 shown in FIG. In FIG. 3, the transmission / reception unit 22 is a circuit that executes transmission / reception processing with the base station 3 and the simplified base station 100 under the control of the control unit 30, and an antenna 21 is connected to the transmission / reception unit 22. The control unit 30 controls the transmission / reception unit 22, the screen display unit 27, and the voice processing unit 23 to perform call processing in voice communication, and perform transmission / reception processing of electronic mail, download processing, and the like. In addition, a microphone 24 and a speaker 25 are connected to the audio processing unit 23. The storage unit 20 stores a program executed by the control unit 30, and the storage unit 20 is also used for storing received data.

  The base station search processing unit 31 searches for all channels that can be used by the mobile communication terminal 2 to find the simple base station 100 that is transmitting predetermined control information (information indicating that it is a simple base station). A processing unit for registering the mobile communication terminal 2 in the simplified base station 100. The base station switching processing unit (base station switching means) 32 is a base station waiting from the base station 3 of the mobile communication network to the simple base station 100 or from the simple base station 100 to the base station 3 of the mobile communication network. It is a processing part for switching. The communication mode selection processing unit 33 has two communication modes, that is, a data communication mode and a call mode, in which the mobile communication terminal 2 hands off to the simplified base station 100 in the data communication mode, and in the call mode, the mobile communication terminal 2 A processing unit for handing off to the base station 3 of the communication network. The double-sided standby processing unit 34 is a processing unit for setting both the base station 3 and the simplified base station 100 of the mobile communication network as standby base stations. For example, in the case of a hybrid mobile communication terminal that can perform voice communication and data communication, the voice communication may be left in the mobile communication network, and the data communication may be switched to the simplified base station 100.

Next, operations of the mobile communication terminal 2 and the simplified base station 100 shown in FIG. 1 will be described with reference to FIG. FIG. 4 is a flowchart showing operations of the mobile communication terminal 2 and the simple base station 100 shown in FIG.
First, the simple base station 100 is connected to the PC 1 (step S201). Thereafter, the simplified base station 100 receives a signal from the neighboring base station 3 and acquires neighboring base station information (step S202). Then, the simplified base station 100 sets the frequency and channel number not used by the neighboring base stations 3 to the transmission frequency and channel number used by itself, and displays the set frequency and channel number as base station information on the display unit 110. (Step S203). Subsequently, the simplified base station 100 transmits a pilot signal and a control signal to the mobile communication terminal 2 at a predetermined power value or less (step S204).

  On the other hand, the mobile communication terminal 2 sets the simple base station mode by a user operation (step S101). The setting of the simple base station mode may be a configuration in which the user sets the frequency (channel) of the simple base station 100, or the base station search processing unit 31 of the mobile communication terminal 2 searches all available channels. Thus, the configuration may be such that the simple base station 100 that transmits predetermined control information (information indicating that it is a simple base station) is searched for. Subsequently, after entering the simple base station mode, the mobile communication terminal 2 adjusts the reception frequency to the set channel and searches for a pilot signal (steps S102 and S103). If the simple base station 100 is found, control information is obtained. Obtaining and transmitting a registration request to the simplified base station 100 (step S104). At this time, the mobile communication terminal 2 is out of range in the mobile communication network.

  When receiving the registration request from the mobile communication terminal 2 (step S205), the simple base station 100 registers the mobile communication terminal 2 that has transmitted the registration request (step S206). Thereafter, similar to the operation in the mobile communication network, the portable communication terminal 2 performs a standby operation for the simple base station 100 until data communication is performed or the simple base station mode is exited (step S105).

  On the other hand, the simple base station 100 monitors a communication request from the mobile communication terminal 2 or a communication request from the PC 1 to the mobile communication terminal 2 (step S207). When a communication request is received from the mobile communication terminal 2 or the PC 1, data communication is performed between the mobile communication terminal 2 and the simplified base station 100 (steps S106 and S208). At this time, communication is performed between the mobile communication terminal 2 and the simplified base station 100 by normal processing.

  After the end of communication (steps S107 and S209), when the mobile communication terminal 2 exits the simple base station mode and returns to the normal operation (step S108), the frequency setting is returned to that before entering the simple base station mode. The standby mode is entered (step S109). When the simplified base station 100 is disconnected from the PC 1 (step S210), the simple base station 100 terminates the operation, and returns to step S204 when the connection is maintained.

  With such a processing procedure, the user can link the information device such as the PC 1 and the mobile communication terminal 2 such as a mobile phone without using a dedicated cable or short-range wireless communication. In addition, communication between the two mobile communication terminals 2 and 2a can be performed via the simple base station 100. In addition, if the simple base station 100 transmits the entire transmission power at a power lower than a predetermined value (for example, −85 dBm), a small area is created and traffic and other mobile communication terminals 2 and the base station 3 are made. It can be avoided. In the case of a communication system in which the base station 3 of the mobile communication network controls the transmission power of the mobile communication terminal 2, the transmission power of the mobile communication terminal 2 is also limited to the minimum necessary on the simple base station 100 side. The other base station 3 and the other portable communication terminal 2 can be prevented from being affected. Furthermore, a communication network in a local area can be configured by the simple base station 100, the information device such as the PC 1, and the plurality of mobile communication terminals 2 and 2a.

  FIG. 5 is a flowchart showing the operation of the mobile communication terminal 2 when the mobile communication terminal 2 shown in FIGS. 1 and 3 waits for both the simple base station 100 and the base station 3 of the mobile communication network. The flow of operation is shown. It is assumed that the simple base station 100 is already operating at this time. Hereinafter, the operation of the mobile communication terminal 2 will be described with reference to FIG.

  First, the mobile communication terminal 2 is set to the simple base station mode (step S301). Subsequently, the mobile communication terminal 2 sets the communication frequency to the frequency of the simple base station 100 and performs a pilot search (step S302). When the simple base station 100 can be captured, registration to the simple base station 100 is performed, and at the same time, the paging timing in the mobile communication network is notified (step S303). At this time, the simple base station 100 sets the paging timing of the simple base station 100 by shifting from the paging timing of the mobile communication network, and notifies the mobile communication terminal 2 of it. Alternatively, even if the mobile communication terminal 2 does not notify the simple base station 100 of the paging timing of the mobile communication network, the simple base station 100 searches the surrounding base station 3 by itself and acquires control information, and then the paging of the mobile communication network You may make it acquire timing. In any case, the simplified base station paging timing is shared between the mobile communication terminal 2 and the simplified base station 100 in step S303.

  In steps S304 to S308, paging reception of the mobile communication network and paging reception of the simple base station 100 are repeated. If there is an incoming call or the like destined for the mobile communication terminal 2 in the mobile communication network, the process in the mobile communication network is executed as it is (step S306), and the mobile communication terminal 2 carries the simple base station 100 or the simple base station 100 carries it. If there is a communication request to the communication terminal 2, communication is performed between the mobile communication terminal 2 and the simplified base station 100 (step S309).

  After the communication is completed (step S310), the mobile communication terminal 2 determines whether or not to cancel the simple base station mode (step S311). If the simple base station mode is not stopped, the mobile communication terminal 2 returns to step S304 and continues to the mobile communication network. Return to standby mode. When the simple base station mode is stopped in step S311, the operation returns to the operation only in the mobile communication network (step S312).

  By waiting for both sides in this way, operations (such as incoming and outgoing calls) in the mobile communication network can also be performed. Alternatively, in the case of a hybrid mobile communication terminal that can perform voice communication and data communication, the voice communication may be left in the mobile communication network 6 and the data communication may be switched to the simple base station 100.

<Second Embodiment>
Next, with reference to the drawings, a base station apparatus and a mobile communication system according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a diagram showing a configuration of a mobile communication system according to the second embodiment. The mobile communication system shown in FIG. 6 includes an information device such as a PC 1 connected to an IP network 5 by a modem 4, a simple base station 100 a connected to the PC 1, a mobile communication terminal 2, and a mobile connected to the IP network 5. It is composed of a communication network 6 and a server 10 installed in the mobile communication network 6. Further, the simplified base station 100a has a configuration in which the function of receiving a signal from the base station 3 in the simplified base station 100 shown in FIG.

  In the mobile communication system shown in FIG. 6, the simple base station 100a (or PC1) registers the mobile communication terminal 2 under the simple base station 100a with respect to the server 10 connected to the mobile communication network 6. Means for notifying that. The server 10 includes means for notifying the simple base station 100a (or PC1) of incoming call information indicating that an incoming call addressed to the mobile communication terminal 2 has been received. Thus, when there is an incoming call addressed to the mobile communication terminal 2, the server 10 notifies the simple base station 100a (or PC1) that there is an incoming call, and the mobile communication terminal 2 is notified of the mobile communication network 6 You can make an incoming call.

FIG. 7 is a sequence diagram showing an operation of the mobile communication system shown in FIG. Hereinafter, the procedure of the incoming call process will be described with reference to FIG.
The simple base station 100a transmits a pilot signal and a control signal to the mobile communication terminal 2 similarly to the mobile communication network 6 (step S401). When the mobile communication terminal 2 enters the simple base station mode, the mobile communication terminal 2 performs a registration operation when detecting a signal from the simple base station 100a (step S402).

  When registration of the mobile communication terminal 2 is performed, the simple base station 100a notifies the PC 1 of information indicating that the registration of the mobile communication terminal 2 has been performed and information related to the mobile communication terminal 2 (step S403). The PC 1 notifies the server 10 of the mobile communication network 6 that the mobile communication terminal 2 is under the control of the simple base station 100a including the information of the mobile communication terminal 2 and the information of the PC 1 (step S404).

  In this way, it can be registered in the server 10 that the mobile communication terminal 2 is under the control of the simple base station 100a. In this example, the notification is sent from the PC 1 to the server 10, but the mobile communication terminal 2 may notify the server 10 itself when the mobile communication terminal 2 enters the subordinate of the simple base station 100a. Further, the block A part surrounded by a broken line in FIG. 7 shows a processing procedure when the mobile communication terminal 2 receives an incoming call and moves to the mobile communication network 6 from the subordinate of the simple base station 100a. Yes. When there is an incoming message addressed to the mobile communication terminal 2, the server 10 notifies the PC 1 of a message including an incoming call request addressed to the mobile communication terminal 2 (step S405). Upon receiving the message, the PC 1 sends a message including that there is an incoming call from the mobile communication network 6 to the portable communication terminal 2 to the simple base station 100a (step S407). Upon receiving the message, the portable communication terminal 2 returns to the mobile communication network 6 and performs an incoming call operation (step S408).

  By performing such an operation, the mobile communication terminal 2 can respond to an incoming call addressed to the mobile communication terminal 2 without waiting for both sides of the simple base station 100a and the base station 3 of the mobile communication network. Battery consumption can be reduced compared to standby.

  7 indicates a processing procedure when an incoming call is made to the mobile communication terminal 2 and an incoming call is made via the simple base station 100a. When there is an incoming call addressed to the mobile communication terminal 2, the server 10 notifies the PC 1 that there is an incoming call (step S409). In response, the PC 1 notifies the simplified base station 100a of this notification (step S410). The simple base station 100a notifies the mobile communication terminal 2 that there is an incoming call (step S411). The mobile communication terminal 2 responds to the simple base station 100a (step S412), and the simple base station 100a notifies the PC 1 of a message including a response request at the simple base station 100a (step S413). The PC 1 notifies the server 10 of a message to be called using the simple base station 100a via the IP network 5 to the server 10 (step S414). Thereafter, the mobile communication network 6 communicates with the mobile communication terminal 2 via the simple base station 100a (step S415).

  In this case, for example, the audio signal may be changed to VoIP by the PC 1 and communicated via the IP network. This method is more efficient when there is an e-mail addressed to the mobile communication terminal 2, and since no incoming / outgoing calls or communications are made with respect to the traffic, it is possible to avoid applying a load.

<Third Embodiment>
Next, a base station apparatus and a mobile communication system according to a third embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a diagram showing a configuration of a mobile communication system according to the third embodiment. The configuration shown in FIG. 8 is different from the configuration shown in FIG. 6 in that the information device is connected to the mobile communication network 6 by the communication module 41 instead of the modem 4. Here, an example of the car navigation 11 is shown as the information device. A portion passing through the IP network 5 shown in FIG. 6 is communication between the communication module 41 and the mobile communication network 6 with the base station 3. Further, the simplified base station 100a has a configuration in which the function of receiving a signal from the base station 3 in the simplified base station 100 shown in FIG.

  In the mobile communication system shown in FIG. 8, when the communication module 41 is a system having the same function as the mobile communication terminal 2, for example, the antenna of the communication module 41 is outside the vehicle and the communication state is good. When the mobile communication terminal 2 is in the vehicle and the communication state is poor, if communication addressed to the mobile communication terminal 2 is performed via the communication module 41, good communication can be maintained and traffic load can be reduced.

  FIG. 9 is a sequence diagram showing an operation of the mobile communication system shown in FIG. The processing operation shown in the sequence diagram of FIG. 9 is basically the same as the processing in the sequence diagram of FIG. 7, but is different from the processing shown in FIG. 7 in that the PC 1 is replaced with the communication module 41, step S504. In step S514, the information transmitted to the server 10 of the mobile communication network 6 is replaced with the transmission of “mobile communication terminal information and communication module information”. It is replaced with “communication request”.

  The portion of the block C surrounded by the wavy line shows a processing procedure when the mobile communication terminal 2 is returned to the mobile communication network 6 when there is an incoming call addressed to the mobile communication terminal 2, and the block D of the wavy line The processing procedure in the case of communicating with the mobile communication network 6 with the mobile communication terminal 2 via the communication module 41 is shown. For block C and block D, for example, when the radio wave condition in the mobile communication network 6 of the portable communication terminal 2 in the vehicle is bad and the radio wave condition of the communication module 41 is good, the process via the communication module 41 shown in the block D is selected. If neither of them changes, the process shown in block C may be selected, or the user may select it.

  With the configuration and processing operations described above, the user wants to download information from the car navigation 11 to the mobile communication terminal 2, downloads data from the PC 1 to the mobile communication terminal 2, and information between a plurality of mobile communication terminals in the car. When it is desired to share, there is no need for a cable connection or a short-range wireless communication function, and the mobile communication terminal 2 can be connected to the car navigation 11 or the PC 1 as it is. It is possible to cope with an incoming call from the mobile communication network 6.

  In the embodiment of the present invention, a mobile communication terminal such as a mobile phone has been described as an example. However, in addition to the mobile phone, the mobile communication terminal includes a mobile terminal, a PDA (Personal Digital Assistance), and the like. It is.

  Since the present invention has an effect that a mobile communication terminal such as an existing mobile phone and an information device such as a personal computer or a car navigation system can be linked by wireless communication, the present invention provides a simple base station and a mobile communication system. Etc. are useful.

It is a figure which shows the 1st structural example of the mobile communication system of this invention. It is a block diagram which shows the structural example of a simple base station. It is a block diagram which shows the structural example of a portable communication terminal. 3 is a flowchart showing an operation of the mobile communication system of FIG. It is a flowchart which shows operation | movement of a portable communication terminal. It is a figure which shows the 2nd structural example of the mobile communication system of this invention. FIG. 7 is a sequence diagram showing an operation of the mobile communication system in FIG. 6. It is a figure which shows the 3rd structural example of the mobile communication system of this invention. FIG. 9 is a sequence diagram showing an operation of the mobile communication system of FIG. 8.

Explanation of symbols

1 PC (information equipment)
2, 2a Mobile communication terminal 3 Base station 4 Modem 5 IP network 6 Mobile communication network 10 Server 11 Car navigation system 30 Control unit 31 Base station search processing unit 32 Base station switching processing unit 33 Communication mode selection processing unit 34 Double-sided standby processing unit 41 Communication module 100, 100a Simple base station 101 Base station communication block 102 Terminal communication block 103 Antenna 104 Radio unit 105 Baseband unit 106 Antenna 107 Radio unit 108 Baseband unit 109 Storage unit 110 Display unit 111 Interface unit 120 Control unit 121 Incoming call Transfer processing unit 122 Data download processing unit 123 Mobile communication terminal registration processing unit 124 Communication setting processing unit 125 Transmission power control processing unit

Claims (7)

Connection means for connecting information devices;
First wireless communication means for receiving a signal from a fixed base station of a mobile communication network;
A second wireless communication means for communicating with the mobile communication terminal;
First information transfer means for transferring call information addressed to the mobile communication terminal from the fixed base station received by the first radio communication means to the mobile communication terminal by the second radio communication means;
A base station apparatus comprising: a second information transfer unit configured to transfer information in the information device read through the connection unit to the mobile communication terminal by the second wireless communication unit. With the signal from the fixed base station received by the first wireless communication means, the peripheral base station information acquisition means for acquiring the peripheral base station information including the base station transmission frequency used in the peripheral fixed base station;
The communication setting processing unit configured to set parameters necessary for communication between the second wireless communication unit and the mobile communication terminal based on the neighboring base station information. Base station device. The second wireless communication means is configured to perform transmission with a transmission power equal to or less than a predetermined value and to communicate with a mobile communication terminal only in a limited range of space. 2. The base station apparatus according to 2. In the case of a communication system in which a fixed base station of the mobile communication network performs transmission power control of the mobile communication terminal, the mobile communication network comprises transmission power control means for controlling the transmission power of the mobile communication terminal to a predetermined value or less. The base station apparatus according to any one of claims 1 to 3. A mobile communication system comprising a mobile communication terminal, a fixed base station of a mobile communication network, and a base station device that transfers incoming call information from the fixed base station to the mobile communication terminal,
The base station device
Connection means for connecting information devices;
First wireless communication means for receiving a signal from the fixed base station;
A second wireless communication means for communicating with the mobile communication terminal;
First information transfer means for transferring call information addressed to the mobile communication terminal from the fixed base station received by the first radio communication means to the mobile communication terminal by the second radio communication means;
Second information transfer means for transferring information in the information device read out through the connection means to the portable communication terminal by the second wireless communication means;
The mobile communication terminal is
A mobile communication system, comprising: base station switching means for switching a standby base station from the fixed base station to the base station device according to a predetermined condition when entering the area of the base station device. The mobile communication terminal is
When the standby base station is switched from the fixed base station to the base station device of the mobile communication network, both the fixed base station and the base station device are configured as standby base stations. The mobile communication system according to claim 5. The mobile communication terminal is
The communication mode is configured to be able to select one of two communication modes, a call mode and a data communication mode. When the data communication mode is selected, handoff to the base station apparatus is performed, and when the call mode is selected, the communication mode is selected. The mobile communication system according to claim 6, wherein the mobile communication system waits for a signal from a fixed base station of the mobile communication network.

Images