JP2009278423A - Radio communication system, mobile station device, radio communication method, and radio communication program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make a mobil station device select communication service with different communication system. <P>SOLUTION: In this radio communication system having: a first base station device which performs communication by a first communication system; a second base station device which performs communication by a second communication system; and the mobile station device which performs communication with the first base station device and the second base station device, the mobile station device has a communication system change part which transmits a change request for changing the communication service to the one by the second communication system to a communication service request for requesting the communication service by the first communication system. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a radio communication system, a mobile station apparatus, a radio communication method, and a radio communication program.

  In a GSM (Global System for Mobile Communications) or W-CDMA (Wideband-Code Division Multiple Access) wireless network used as a communication system in recent years, circuit switching (CS) that occupies a line such as a voice call and performs communication. : Circuit switching) and a packet switching (PS) method in which communication is performed using packets. This packet switching is characterized in that communication at a higher speed than the conventional circuit switching system is possible.

Utilizing this feature, a network in which all communication services that have been conventionally performed by the circuit switching method are performed by the packet switching method has been studied.
For example, the 3GPP (The 3rd Generation Partnership Project: 3rd Generation Partnership Project), which is standardizing mobile phones, is also considering next-generation specifications as LTE (Long Term Evolution), and all communication services A so-called ALL-IP (Internet Protocol) network is employed, which executes a packet switching method.
In this LTE, a voice call in a packet switching method using a technology called VoIP (Voice over IP) is adopted for a voice call which is an example of a communication service that has been conventionally performed in a circuit switching method. Yes. This voice over IP VoIP is a technology that realizes a voice call by compressing voice data by various encoding methods, dividing the data into packet units, and communicating the packets over an IP network.

A dual terminal that can be connected to both a circuit-switched network (for example, a W-CDMA network) and a packet-switched network (for example, an LTE network) is either a circuit-switched network or a packet-switched network. In both cases, when the user is in an environment where standby and communication are possible, the user can download data at a higher speed using a packet-switched network.
However, when trying to execute a communication service (for example, a voice call) that requires real-time performance in a conventional circuit-switched network in a packet-switched network, although not so fast communication is required, Communication quality may be degraded, such as voice delays or interruptions. For this reason, the user may prefer to communicate over a circuit-switched network as before in order to guarantee delay and quality.

In addition, the base station apparatus does not like to provide a low-rate communication service from the viewpoint of increasing the total throughput by the packet switching method, and the low-rate communication service is implemented not by the packet switching method but by the circuit switching method. There is a possibility to choose. Furthermore, a terminal device or a base station device that does not perform a voice call at all in the packet switching method depending on settings or the like is also conceivable.
In these cases, if an incoming voice call occurs while waiting in a cell of a base station apparatus that performs packet-switched communication, the voice call using voice over IP VoIP is set to be unfavorable. However, since the voice call using the voice over IP VoIP is started or the voice call using the voice over IP VoIP is not set, the voice call cannot be received.

Therefore, Non-Patent Document 1 describes a switching method for switching a voice call using voice over IP VoIP to a circuit-switched voice call. In Non-Patent Document 1, for example, in Section 7.19.1.1.7.2.1, when a mobile terminal is carrying out a voice call using Voice over IP VoIP with an LTE base station apparatus, the LTE base It is described that a station apparatus makes a handover request to a base station apparatus of GSM or W-CDMA. That is, an LTE base station apparatus can perform a handover from a voice call using voice over IP VoIP to a circuit-switched voice call according to a communication situation.
3GPP TR23.882 “3GPP System Architecture Evolution: Report on Technical Options and Consolidations (Release 7)” v1e0

However, in the conventional switching method, the base station device requests a change to a communication service with a different communication method during communication, and the mobile station device is located in the communication service based on the incoming call notification from the base station device. There is a drawback that it is impossible to start a communication service with a different communication method without starting a communication service with the communication method of the base station apparatus.
For example, a mobile station device that cannot perform a voice call using voice over IP VoIP, which is a voice call (communication service) based on a packet switching method, receives a voice call while in a network using voice over IP VoIP as a voice call. In this case, there is a drawback that it is not possible to shift to a voice call based on the circuit switching method and a voice call service cannot be received.
In addition, a base station apparatus dedicated to the packet switching method that cannot perform voice communication using Voice over IP VoIP, which is a voice communication (communication service) based on the packet switching method, provides voice to all mobile station devices in the area. There is a drawback that the voice call service cannot be continued by shifting to a base station apparatus capable of making a call.
In addition, a base station device that has a wide communication area (communication area) but can only perform low-speed packet communication, or a mobile station device that is waiting on a base station device that performs communication with a high communication fee is the base station device. High-speed packet communication is not possible with a base station device that is capable of high-speed packet communication, or a base station device with a low communication fee. There is a disadvantage that it takes time until it is made or an unnecessary fee is generated.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a communication service with a different communication method without starting the communication service in the communication method of the base station device in which the mobile station device was located. Is to provide a wireless communication system, a mobile station apparatus, a wireless communication method, and a wireless communication program.

(1) The present invention has been made to solve the above-described problems, and one aspect of the present invention is communication with the first base station apparatus that communicates with the first communication method and the second communication method. In a wireless communication system comprising: a second base station device that performs communication; and a mobile station device that communicates with the first base station device and the second base station device. A communication method changing unit that transmits a change request for changing to a communication service based on the second communication method in response to a communication service request requesting a communication service based on the method
According to the above configuration, the mobile station apparatus uses the second communication system with the second base station apparatus in response to the communication service request from the first base station apparatus that requests the communication service using the first communication system. Since a change request for changing to a communication service is transmitted, a communication service with a different communication method can be started without starting the communication service in the communication method of the base station device in which the mobile station device was located.

  (2) Moreover, 1 aspect of this invention WHEREIN: The said communication system change part transmits the said change request with respect to a said 2nd base station apparatus.

  (3) Further, according to one aspect of the present invention, the change request is information for the second base station apparatus to acquire information for communicating with the mobile station apparatus from the first base station apparatus. including.

  (4) Moreover, 1 aspect of this invention WHEREIN: The said communication system change part transmits the said change request with respect to a said 1st base station apparatus.

  (5) Further, according to one aspect of the present invention, the change request includes information that causes the second base station device to transmit information about the first base station device.

(6) Further, according to one aspect of the present invention, the communication method change unit transmits the change request in advance before the communication service request.
According to the above configuration, since the mobile station apparatus transmits the change request in advance before the communication service request, the mobile station apparatus can change the communication method before making a communication service request to the mobile station apparatus. It is possible to shorten the time until the apparatus starts communication requested for the communication service.

  (7) Further, according to an aspect of the present invention, the mobile station apparatus includes a communication service request detection unit that detects a communication service request for requesting communication of the first communication method, and the communication method change unit includes a communication service request In response to the communication service request detected by the service request detection unit, a change request for changing to a communication service based on the second communication method is transmitted.

(8) In addition, according to an aspect of the present invention, the mobile station apparatus stores communication availability information that stores communication service availability information that indicates whether or not the first communication method can be implemented for each type of communication service. The communication method change unit transmits the change request when the communication service availability information stored in the communication availability information storage unit is information indicating that the service according to the first communication method cannot be performed.
According to the above configuration, the mobile station apparatus stores in advance that the service cannot be performed using the first communication method, and changes the communication service request based on the first communication method that cannot be performed to the second communication method. Since the request is made, it becomes easier to receive the service using the second communication method than the service using the first communication method.

  (9) Further, according to one aspect of the present invention, the mobile station apparatus includes a communication service availability information updating unit that updates the communication service availability information.

  (10) In addition, according to one aspect of the present invention, the communication service availability information indicates that the mobile station apparatus can perform communication service according to the first communication method when the mobile station device cannot perform the communication service according to the first communication method. Information indicating that the operation is not possible.

  (11) Further, according to one aspect of the present invention, the first communication method is a packet switching method, and the second communication method is a circuit switching method.

  (12) Further, according to one embodiment of the present invention, an area in which communication can be performed using the communication service using the first communication method is wider than an area in which communication can be performed using the communication service using the second communication method. .

  (13) Further, according to one aspect of the present invention, a communication fee for a communication service according to the first communication method is higher than a communication fee for a communication service according to the second communication method.

  (14) In addition, according to one aspect of the present invention, the first base station apparatus that performs communication using the first communication scheme, the second base station apparatus that performs communication using the second communication scheme, and the first base station apparatus In a base station apparatus and a mobile station apparatus communicating with the second base station apparatus, a communication service request for requesting a communication service based on the first communication system is changed to a communication service based on the second communication system. A communication system changing unit that transmits the change request is provided.

  (15) According to another aspect of the present invention, the first base station apparatus that communicates using the first communication scheme, the second base station apparatus that communicates using the second communication scheme, and the first base station apparatus In a wireless communication method in a wireless communication system comprising a base station device and a mobile station device communicating with the second base station device, the mobile station device requests a communication service using the first communication method. A change request for changing to a communication service based on the second communication method in response to the communication service request to be transmitted.

  (16) According to another aspect of the present invention, the first base station apparatus that communicates using the first communication scheme, the second base station apparatus that communicates using the second communication scheme, and the first base station apparatus In response to a communication service request for requesting a communication service according to the first communication method, the computer of the mobile station device communicating with the base station device and the second base station device is changed to a communication service according to the second communication method. It functions as a means for transmitting a change request to be changed.

  According to the present invention, in response to a communication service request for requesting a communication service by the first communication method from the first base station device, the mobile station device uses the second communication method with the second base station device. Since the change request to change to the communication service by the mobile station device is transmitted, it is possible to start the communication service with a different communication method without starting the communication service with the communication method of the base station device in which the mobile station device was located. .

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of a communication system according to a first embodiment of the present invention.
In this figure, a mobile phone terminal B (mobile station device) includes a cell that is in communication range with a LTE (Long Term Evolution) base station device A (first base station device), and a W-CDMA (Wideband-Code Division). (Multiple Access) The base station apparatus C (second base station apparatus) is in a place where it can be located in both of the cells.
The mobile phone terminal B registers its location with either the LTE base station apparatus A or the W-CDMA base station apparatus C, and enters a service area state. The cellular phone terminal B can receive an incoming call if it is registered in the cell of the LTE base station apparatus A or the W-CDMA base station apparatus C after performing location registration. With respect to the LTE base station apparatus A or W-CDMA base station apparatus C that has not performed location registration, the mobile phone apparatus B can be monitored as a monitor cell. Regarding the cell being monitored as a monitor cell, it is possible to measure the reception level periodically and change the serving cell if the reception level is higher than the standby cell. This operation is called celery selection processing.

The LTE base station apparatus A performs all communication services by a packet switching method (first communication method) in which communication is performed using packets. Communication services include, for example, voice calls, videophone calls, streaming, and e-mail.
Also, the LTE base station apparatus A performs, for example, voice communication with the mobile phone apparatus B by communication using VoIP (Voice over IP) which is a packet service.
The voice over IP VoIP is a technique for realizing a voice call by compressing voice data by various encoding methods and dividing the data into packet units and communicating the packets over an IP network.
Further, the LTE base station apparatus A and the W-CDMA base station apparatus C can communicate with each other via the mobile phone network D.

The W-CDMA base station apparatus C performs communication by a line switching method (second communication method) in which communication is performed while occupying a communication line and a packet switching method.
Note that packet-switched communication has a feature that communication at a higher speed is possible than circuit-switched communication. On the other hand, circuit-switched communication has a feature that communication with higher quality such as voice delay prevention by voice call becomes possible than packet-switched communication.

  For example, since the cellular phone device B cannot perform communication using the voice over IP VoIP, or performs high quality communication, the mobile phone device B selects the communication of the circuit switching method, and the voice using the voice over IP VoIP. In response to a call request, a change request is made to change this to a voice call based on a circuit switching system.

  Hereinafter, the LTE base station apparatus A, the mobile phone apparatus B, and the W-CDMA base station apparatus C according to the present embodiment will be described. The LTE base station apparatus A is the LTE base station apparatus a1, the mobile phone apparatus B is the mobile phone apparatus b1, and the W-CDMA base station apparatus C is the W-CDMA base station apparatus c1.

First, the LTE base station apparatus a1 will be described. The LTE base station apparatus a1 is a base station apparatus that performs only packet switching communication.
FIG. 2 is a schematic block diagram showing the configuration of the LTE base station apparatus a1 according to this embodiment.
The LTE base station apparatus a1 includes a reception antenna a11, a reception unit a12, a control unit a13, a storage unit a14, a communication unit a15, a transmission unit a16, and a transmission antenna a17. In addition, the LTE base station apparatus a1 includes other general functions of the base station apparatus.

The receiving antenna a11 receives the signal transmitted from the mobile phone device b1 and outputs it to the receiving unit a12.
The reception unit a12 down-converts the reception signal input from the reception antenna a11 from a radio frequency signal to a baseband signal, and then outputs the reception information converted into a digital signal by analog / digital conversion to the control unit a13. .

When the incoming information that is a request for the communication service to the mobile phone device located in the cell is input from the communication unit a15, the control unit a13 receives the input incoming call in the incoming information storage unit a141 of the storage unit a14. Remember information.
For example, when information for requesting a voice call using Voice over IP VoIP, which is a communication service using the packet switching method to the mobile phone device b1, is input from the communication unit a15, the control unit a13 is included in the information. The identification information of the mobile phone device b1, the identification information of the caller, and the like are stored in the incoming information storage unit a141 as incoming information.

The control unit a13 includes a communication service request unit a131 and an incoming information transmission unit a132.
The communication service request unit a131 generates communication service request information for the mobile phone device when the incoming information to the mobile phone device located in the cell is input from the communication unit a15, and transmits the communication service request information to the mobile phone device do.
For example, when information requesting a voice call using voice over IP VoIP to the mobile phone device b1 located in the cell is input from the communication unit a15, the communication service request unit a131 receives the information as a short text message. Using SMS (Short Message Service), which is a service for exchanging messages, the message is transmitted to the mobile phone device b1 via the transmitter a16.

The incoming information transmission unit a132 receives information requesting incoming information of the mobile phone device from another base station, and sends the requested incoming information of the mobile phone device to the base station that transmitted the requested information. To send.
For example, the incoming information transmission unit a132 receives information requesting incoming information of the mobile phone device b1 from the W-CDMA base station device c1 via the communication unit a15 and the mobile phone network D. When receiving the information requesting the incoming information, the incoming information transmitting unit a132 reads the requested incoming information of the mobile phone device b1 from the incoming information storage unit a141. Then, the incoming call information transmission unit a132 transmits the read incoming call information of the mobile phone device b1 to the W-CDMA base station device c1 that is the request source via the communication unit a15 and the mobile phone network D.

  The communication unit a15 communicates with a W-CDMA base station device c1 described later via the mobile phone network D under the control of the control unit a13.

The transmission unit a16 transmits the information input from the control unit a13 to the mobile phone device b1.
The transmission unit a16 converts the digital signal input from the control unit a13 into an analog signal by digital / analog conversion, up-converts the signal to a radio frequency signal as a transmission signal, and transmits the signal to the mobile phone device b1 via the transmission antenna a17. Send to.

Note that the reception unit a12, the control unit a13, the communication unit a15, and the transmission unit a16 are realized by reading and executing a program stored in the storage unit a14 or by an electronic circuit.
The storage unit a14 holds data and is realized using a magnetic hard disk device or a semiconductor memory.

Next, the cellular phone device b1 will be described.
FIG. 3 is a schematic block diagram showing the configuration of the mobile phone device b1 according to the present embodiment.
The cellular phone device b1 includes a reception antenna b11, a reception unit b12, a control unit b13, a storage unit b14, a transmission unit b15, and a transmission antenna b16. In addition, the mobile phone device b1 has other general functions of the mobile phone device.

The reception antenna b11 receives signals transmitted from the LTE base station apparatus a1 and the W-CDMA base station apparatus c1, and outputs the signals to the reception unit b12.
The reception unit b12 down-converts the reception signal input from the reception antenna b11 from a radio frequency signal to a baseband signal, and then demodulates the reception information converted into a digital signal by analog / digital conversion to control the control unit b13. Output to.

  The receiving unit b12 demodulates a signal transmitted from the LTE base station apparatus a1 using an OFDMA (Orthogonal Frequency Division Multiplexing Access) system, and also uses a CDMA system from the W-CDMA base station apparatus c1. Demodulate the transmitted signal.

The receiving unit b12 includes a communication service request detecting unit b121.
The communication service request detection unit b121 detects a communication service request for requesting a communication service using a packet switching method (first communication method).
For example, the communication service request detection unit b121 receives communication service request information transmitted from the LTE base station apparatus a1 using the short message service SMS, and the communication service requested by the information is a voice over which is a packet switching method. A voice call using IP VoIP is detected.

The control part b13 is comprised including the base station apparatus information acquisition part b131 and the communication system change part b132.
The base station device information acquisition unit b131 acquires information on the base station device that transmitted the broadcast information and information on neighboring cells of the base station device from the broadcast information of each base station device received by the reception unit b12. To do. The base station apparatus information acquisition unit b131 acquires information on the base station apparatus from the peripheral base station apparatus based on the acquired peripheral cell information.
For example, the identification information (cell ID) of the LTE base station apparatus a1 and the communication method information of the LTE base station apparatus a1 are acquired from the broadcast information of the LTE base station apparatus a1. Moreover, the base station apparatus information acquisition unit b131 acquires neighboring cell information included in the broadcast information of the LTE base station apparatus a1. Then, the base station apparatus information acquisition unit b131 performs a cell search for the base station apparatus included in the acquired neighboring cell information, and, for example, from the W-CDMA base station apparatus c1 to the W-CDMA base station apparatus c1. Identification information (example cell ID) and information on the communication system of the W-CDMA base station apparatus c1 are acquired.

The base station apparatus information acquisition unit b131 stores the base station apparatus information acquired by the broadcast information and the cell search in the base station information storage unit b142 of the storage unit b14.
For example, the base station information storage unit b142 associates information indicating that the communication method is a packet switching method with the cell ID of the LTE base station device a1, and also relates to the cell ID of the W-CDMA base station device c1. On the other hand, information indicating that the communication system is the circuit switching system is stored in association with each other.

Note that the base station device information acquisition unit b131 may acquire the communication method information by identifying the communication method of the base station device according to the difference in the wireless communication method.
Specifically, the mobile phone device b1 performs radio communication with the LTE base station device and the W-CDMA base station device by the OFDM method and the CDMA method, respectively. The base station apparatus information acquisition unit b131 identifies the base station apparatus based on the difference in the radio communication scheme, and the base station apparatus that performs radio communication by the OFDM scheme is a base station apparatus that performs only packet-switching scheme communication. The base station apparatus that performs wireless communication by the scheme may identify the base station apparatus that performs communication of the circuit switching scheme and store the identified communication scheme in the base station information storage unit b142.

The communication enable / disable information storage unit b141 stores communication service enable / disable information indicating whether or not the communication service can be performed by the packet switching method for each type of communication service.
The communication service availability information stored in the communication availability information storage unit b141 is, for example, information indicating that a voice call using voice over IP VoIP, which is a packet switching method, cannot be performed for a voice call. The e-mail which is a packet switching method is information indicating that the communication service can be implemented.

  The communication service availability information includes, for example, a case where a user of the mobile phone device b1 or the like wants to communicate in a circuit switching system in order to avoid deterioration in communication quality for a communication service that requires real-time performance, or the mobile phone device b1 When a voice call using the voice over IP VoIP cannot be made, information indicating that the communication service cannot be performed is registered in association with the voice call using the voice over IP VoIP.

The communication method change unit b132 is a communication service based on the packet exchange method in which the communication service availability information stored in the communication availability information storage unit b141 of the storage unit b14 is the communication service requested by the communication service request detected by the communication service request detection unit b121. Is transmitted to the W-CDMA base station apparatus c1 (second base station apparatus), a change request for changing to a communication service based on the circuit switching system (second communication system) is transmitted. To do.
That is, the communication method change unit b132 causes the transmission unit b15 to transmit a change request for changing to the communication service of the circuit switching method (second communication method) in response to the communication service request detected by the communication service request detection unit b121.
As a result, the cellular phone device b1 is more likely to receive a communication service based on the circuit switching method than a communication service based on the packet switching method.

For example, when a voice call request using the voice over IP VoIP detected by the communication service request detection unit b121 is input, the communication method changing unit b132 stores the communication availability information for the voice call using the voice over IP VoIP. The communication service availability information is read from the part b141.
The communication system changing unit b132 stores the base station information stored in the base station information storage unit b142 when the communication service availability information regarding the voice call using the voice over IP VoIP is information indicating that the communication service cannot be performed. From the device information, a base station device that performs circuit switching communication is searched.

As a result of the search, the communication method changing unit b132 specifies a base station apparatus that performs communication in the circuit switching method. The communication method changing unit b132 uses the request information (hereinafter referred to as a cell reselection request) for communicating between the mobile phone device and the specified base station device as change request information, and sends a transmission unit to the specified base station device. Transmit via b15.
For example, the communication scheme change unit b132 identifies the W-CDMA base station device c1 that performs communication in the circuit switching scheme, and makes a cell reselection request to the W-CDMA base station device c1.

When making a celery selection request, the communication method changing unit b132 transmits information on the base station apparatus that has made the communication service request to the base station apparatus that makes the celery selection request.
That is, the cell reselection request that is a change request includes information for the second base station device to acquire information for communicating with the mobile station device from the first base station device.

  For example, the communication method changing unit b132 transmits the information of the LTE base station device a1 that has made the communication service request stored in the base station information storage unit b142 to the W-CDMA base station device c1 that has made a cell reselection request. Transmit via b15. Note that the information of the LTE base station apparatus a1 is the cell ID of the LTE base station apparatus a1. The W-CDMA base station device c1 that has received the cell ID information communicates with the LTE base station device a1 based on the cell ID, and communicates with the incoming information to the mobile phone device b1, that is, the mobile phone device b1. Get information to do.

The communication availability information updating unit b133 updates the communication service availability information.
For example, the communication availability information update unit b133 displays the communication service availability information on a display unit (not shown), and allows the user of the mobile phone device b1 to use an operation unit (not shown) according to his / her preference and contract contents with a communication company. The communication service availability information stored in the communication availability information storage unit b141 is updated by depressing the numeric keypad, the cross key, and the enter key, and detecting the depression.
In addition, when the mobile phone device b1 cannot implement the communication service using the first communication method, the communication availability information update unit b133 gives the manufacturer of the mobile phone device b1 information corresponding to the function of the mobile phone device. The data may be input by a device that inputs data, and the input information may be stored in the communication availability information storage unit b141. That is, the communication service availability information is information indicating that the communication service according to the first communication method cannot be performed when the mobile phone device b1 cannot perform the communication service according to the first communication method.

  The transmission unit b15 converts the digital signal information input from the control unit b13 into an analog signal by digital / analog conversion, up-converts it to a radio frequency signal as a transmission signal, and transmits, for example, via the transmission antenna b16. , Transmit to the LTE base station apparatus a1 or the W-CDMA base station apparatus c1.

Note that the reception unit b12, the control unit b13, and the transmission unit b15 are realized by reading and executing a program stored in the storage unit b14 or by an electronic circuit.
The storage unit b14 holds data and is realized using a magnetic hard disk device or a semiconductor memory.

Next, the W-CDMA base station apparatus c1 will be described. The W-CDMA base station apparatus c1 is a base station apparatus that performs circuit switching communication.
FIG. 4 is a schematic block diagram showing the configuration of the W-CDMA base station apparatus c1 according to this embodiment.
The W-CDMA base station apparatus c1 includes a reception antenna c11, a reception unit c12, a control unit c13, a storage unit c14, a communication unit c15, a transmission unit c16, and a transmission antenna c17. In addition, the W-CDMA base station apparatus c1 has other general functions of the base station apparatus.

  The reception antenna c11 receives the signal transmitted from the mobile phone device b1 and outputs the signal to the reception unit c12. The reception unit c12 down-converts the reception signal input from the reception antenna c11 from a radio frequency signal to a baseband signal, and then demodulates the reception information converted into a digital signal by analog / digital conversion to control the control unit c13. Output to.

The control unit c13 includes an incoming call information acquisition unit c131.
When receiving the cell reselection request from the mobile phone device and the information of the base station device that has made a communication service request to the mobile phone device via the receiving unit c12, the incoming call information acquisition unit c131 communicates with the mobile phone device. The incoming call information of the cellular phone device that has made the cell reselection request is acquired from the base station device that has requested the service.
For example, the incoming information acquisition unit c131 transmits information requesting incoming information of the mobile phone device b1 to the LTE base station device a1 via the communication unit c15 and the mobile phone network D. It communicates with LTE base station apparatus a1 based on the cell ID of LTE base station apparatus a1 received from mobile phone apparatus b1.
The incoming call information acquisition unit c131 receives incoming call information to the mobile phone device b1 from the LTE base station device a1 via the communication unit c15 and the mobile phone network D, and stores it in the incoming call information storage unit c141 of the storage unit c14.

  The communication unit c15 communicates with the LTE base station apparatus a1 via the mobile phone network D under the control of the control unit c13.

  The transmission part c16 transmits the information input from the control part c13 to a mobile telephone apparatus. Specifically, the transmission unit c16 converts the digital signal information input from the control unit c13 into an analog signal by digital / analog conversion, up-converts the signal to a radio frequency signal, and transmits the transmission antenna c17. For example, it transmits to the mobile phone device b1.

The reception unit c12, the control unit c13, the communication unit c15, and the transmission unit c16 are realized by reading out and executing a program held in the storage unit c14, or by an electronic circuit.
The storage unit c14 holds data and is realized using a magnetic hard disk device or a semiconductor memory.

Hereinafter, the operation of the wireless communication system will be described.
FIG. 5 is a flowchart showing the operation of the wireless communication system according to the present embodiment.
First, the mobile phone device b1 waits for communication from the LTE base station device a1 (S101). Note that the cellular phone device b1 acquires the information on the LTE base station device a1 and the information on the LTE base station device a1 and the information on the W-CDMA base station device c1 by cell search based on the information, respectively. It is done.

Next, the LTE base station device a1 receives a voice call request using VoIP to the mobile phone device b1, and notifies the mobile phone device b1 of an incoming short message service SMS (S102).
Next, the cellular phone device b1 connects the LTE base station device a1 and the radio resource layer (S103). Then, the cellular phone device b1 receives the message information of the short message service SMS, and detects a voice call request using Voice over IP VoIP from the message information of the short message service SMS (S104). Further, after receiving the message information of the short message service SMS, the cellular phone device b1 disconnects the radio resource layer (S105).

  Next, the cellular phone device b1 makes a cell reselection request to the W-CDMA base station device c1 (S106). Then, the cellular phone device b1 performs celery selection processing and starts communication with the W-CDMA base station device c1 (S107). At this time, the cellular phone device b1 transmits information for communicating with the LTE base station device a1 to the W-CDMA base station device c1 (S108).

Next, the W-CDMA base station device c1 requests the LTE base station device a1 for incoming information to the mobile phone device b1 (S109). The LTE base station apparatus a1 transmits incoming call information to the mobile phone apparatus b1 to the W-CDMA base station apparatus c1 (S110).
Next, the W-CDMA base station device c1 performs communication incoming notification using the circuit switching method based on the incoming information to the mobile phone device b1 (S111). Then, the cellular phone device b1 performs a voice call using the circuit switching method via the W-CDMA base station device c1 (S112).

  As described above, according to the present embodiment, the mobile station apparatus b1 responds to a communication service request for requesting a communication service based on the packet switching method from the LTE base station apparatus a1 with the line with the W-CDMA base station apparatus c1. A change request for changing to a communication service based on an exchange method is transmitted. Thereby, it is possible to start a communication service with a different communication method without starting the communication service with the communication method of the base station device in which the mobile station device was located.

(Second Embodiment)
The second embodiment of the present invention will be described below with reference to the drawings.
In the first embodiment, the wireless communication system changes the communication service based on the packet switching method to the communication service based on the circuit switching method by the cell reselection processing. However, in the present embodiment, the communication service based on the packet switching method is changed by the handover processing. Is changed to a circuit-switched communication service.
The conceptual diagram of the communication system is the same as FIG. 1 of the first embodiment.

  Hereinafter, the LTE base station apparatus A, the mobile phone apparatus B, and the W-CDMA base station apparatus C according to the present embodiment will be described. The LTE base station apparatus A is the LTE base station apparatus a2, the mobile phone apparatus B is the mobile phone apparatus b2, and the W-CDMA base station apparatus C is the W-CDMA base station apparatus c2.

First, the LTE base station apparatus a2 will be described.
FIG. 6 is a schematic block diagram illustrating a configuration of the LTE base station apparatus a2 according to the present embodiment.
When the LTE base station apparatus a2 (FIG. 6) according to the present embodiment is compared with the LTE base station apparatus a1 (FIG. 2) according to the first embodiment, only the control unit a23 is different. However, since the functions of other components (reception antenna a11, reception unit a12, storage unit a14, communication unit a15, transmission unit a16, and transmission antenna a17) are the same as those in the first embodiment, A description of the same functions as those in the embodiment is omitted.

  When the incoming information for the mobile phone device b2 located in the cell is input from the communication unit a15, the control unit a23 stores the input incoming information in the incoming information storage unit a141 of the storage unit a14.

The control unit a23 includes a communication service request unit a131, an incoming call information transmission unit a232, and a handover control unit a233.
Since the function of the communication service request unit a131 is the same as that of the first embodiment, the description thereof is omitted.

When the mobile phone device in communication requests a handover to another base station device, the incoming information transmission unit a232 transmits the incoming information of the mobile phone device to the other base station device.
For example, when the handover control unit a233 transmits handover request information for requesting handover to the W-CDMA base station device c2 for the mobile phone device b1, the incoming information of the mobile phone device b1 read from the incoming information storage unit a141 is It transmits to W-CDMA base station apparatus c2 via the communication part a15 and the mobile telephone network D.

The handover control unit a233 receives handover request information and information for communicating with the handover destination base station apparatus from the mobile phone apparatus in communication, and sends the handover request to the handover destination base station apparatus. To send.
For example, the handover control unit a233 receives the handover request information and the information for communicating with the W-CDMA base station device c2 that is the handover destination from the mobile phone device b2 via the receiving unit a12. Here, the information for communicating with the W-CDMA base station apparatus c2 is identification information (cell ID) of the W-CDMA base station apparatus c2.
When the information is input, the handover control unit a233 transmits the handover request information to the W-CDMA base station device c2 via the communication unit a15 and the mobile phone network D.

In response to the transmitted handover request, the handover control unit a233 generates information necessary for handover to the mobile phone device that has requested the handover.
For example, when the handover control unit a233 receives the handover permission information of the mobile phone device b2 from the W-CDMA base station device c2 via the communication unit a15 and the mobile phone network D, the mobile phone device b2 performs handover. Generate the information needed for Here, the information necessary for handover is, for example, identification information (cell ID) of the W-CDMA base station apparatus c2.
The handover control unit a233 transmits information necessary for the generated cellular phone device b2 to perform handover to the cellular phone device b2 via the transmission unit a16.

  The control unit a23 is realized by reading and executing a program held in the storage unit a14 or by an electronic circuit.

Next, the cellular phone device b2 will be described.
FIG. 7 is a schematic block diagram showing the configuration of the mobile phone device b2 according to the present embodiment.
When the cellular phone device b2 (FIG. 7) according to the present embodiment is compared with the cellular phone device b1 (FIG. 3) according to the first embodiment, only the control unit b23 is different. However, since the functions of other components (reception antenna b11, reception unit b12, storage unit b14, transmission unit b15, and transmission antenna b16) are the same as those in the first embodiment, they are the same as those in the first embodiment. A description of the function is omitted.

The control unit b23 includes a base station information acquisition unit b131 and a communication method change unit b232.
Since the function of the base station information acquisition unit b131 is the same as that of the first embodiment, description thereof is omitted.

The communication method change unit b232 includes a communication service availability information stored in the communication availability information storage unit b141 of the storage unit b14 for the communication service requested by the communication service request detected by the communication service request detection unit b121. In the case of the information indicating that the communication is not possible, a change request for changing the communication service to the circuit switching method is transmitted to the LTE base station apparatus a2 (first base station apparatus).
That is, the communication method change unit b232 causes the transmission unit b15 to transmit a change request for changing to a communication service based on the circuit switching method (second communication method) in response to the communication service request detected by the communication service request detection unit b121.

For example, when a request for a voice call using the voice over IP VoIP detected by the communication service request detection unit b121 is input, the communication method changing unit b232 stores a communication availability information for the voice call using the voice over IP VoIP. The communication service availability information is read from the part b141.
When the communication service availability information for the voice call using the voice over IP VoIP read is information indicating that the communication service cannot be performed, the communication system change unit b232 stores the base station stored in the base station information storage unit b142 From the device information, a base station device that performs circuit switching communication is searched.

As a result of the search, the communication system changing unit b232 identifies a base station apparatus that performs communication in the circuit switching system. The communication system changing unit b232 uses the request information (handover request) for communicating between the mobile phone device and the specified base station device as the change request information, and transmits the request to the base station device that has requested the communication service. To send through.
For example, the communication scheme change unit b232 identifies the W-CDMA base station device c1 that performs circuit switching communication and makes a handover request to the LTE base station device a2.
Note that the process of switching the base station apparatus with which the mobile phone apparatus communicating with the base station apparatus communicates is called a handover process.

When making a handover request, the communication method change unit b232 transmits information on the base station apparatus that has requested the communication service to the base station apparatus that makes the handover request.
That is, the handover request that is a change request includes information that causes the information on the first base station device to be transmitted to the second base station device.

  For example, the communication method change unit b132 transmits the information of the LTE base station device a2 that has made the communication service request stored in the base station information storage unit b142 to the LTE base station device a2 via the transmission unit b15. The LTE base station apparatus a2 that has received the information transmits information on the LTE base station apparatus a2 to the W-CDMA base station apparatus c2. Further, when making a handover request, the transmission unit b15 connects the radio resource layer and then makes a handover request.

  The control unit b23 is realized by reading and executing a program held in the storage unit b14 or by an electronic circuit.

Next, the W-CDMA base station apparatus c2 will be described.
FIG. 8 is a schematic block diagram showing the configuration of the W-CDMA base station apparatus c2 according to this embodiment.
When the W-CDMA base station apparatus c2 (FIG. 8) according to the present embodiment is compared with the W-CDMA base station apparatus c1 (FIG. 4) according to the first embodiment, only the control unit c23 is different. However, since the functions of other components (reception antenna c11, reception unit c12, storage unit c14, communication unit c15, transmission unit c16, and transmission antenna c17) are the same as those in the first embodiment, A description of the same functions as those in the embodiment is omitted.

  The control unit c23 includes an incoming call information acquisition unit c231 and a handover control unit c232.

When the incoming information acquisition unit c231 receives a handover request for the mobile phone device from another base station device via the communication unit c15 and the mobile phone network D, there is a request for the handover from the other base station. Incoming call information of the mobile phone device is acquired.
For example, when receiving a handover request for the mobile phone device b2 from the LTE base station device a2 via the communication unit c15 and the mobile phone network D, the incoming call information acquisition unit c231 receives the mobile phone device b2 from the LTE base station device a2. Is received and stored in the incoming information storage unit c141 of the storage unit c14.

When the handover control unit c232 receives the handover request information for the mobile phone device, the handover control unit c232 determines whether to permit the handover and transmits the determination result.
For example, the handover control unit c232 receives handover request information for the mobile phone device b2 from another base station device via the communication unit c15 and the mobile phone network D. When the handover request information is input, the handover control unit c232 determines whether or not to allow the handover based on the load status of the own base station device. When the handover is permitted, the handover control unit c232 transmits information allowing the handover and information necessary for the handover to the LTE base station apparatus a2 via the communication unit c15.

  Note that the control unit c23 is realized by reading and executing a program held in the storage unit c14 or by an electronic circuit.

Hereinafter, the operation of the wireless communication system will be described.
FIG. 9 is a flowchart showing the operation of the wireless communication system according to the present embodiment.
First, the mobile phone device b2 waits for communication from the LTE base station device a2 (S201). Note that the cellular phone device b2 acquires the information on the LTE base station device a2 and the information on the LTE base station device a2 and the information on the W-CDMA base station device c2 by cell search based on the information, respectively. It is done.

Next, the LTE base station device a2 receives a voice call request using VoIP to the mobile phone device b2, and notifies the mobile phone device b2 of an incoming short message service SMS (S202).
Next, the cellular phone device b2 connects the LTE base station device a2 and the radio resource layer (S203). Then, the cellular phone device b2 receives the message information of the short message service SMS, and detects a request for a voice call using the voice over IP VoIP from the message information of the short message service SMS (S204). Further, after receiving the message information of the short message service SMS, the cellular phone device b2 disconnects the radio resource layer (S205).

Next, the cellular phone device b2 makes a connection request to the LTE base station device a2 by communication using voice over IP VoIP (S206). Then, the cellular phone device b2 connects the LTE base station device a2 and the radio resource layer in order to perform communication using the Voice over IP VoIP to the LTE base station device a2 (S207).
Next, the cellular phone device b2 transmits a handover request and information on the W-CDMA base station device c2 acquired by the cell search to the LTE base station device a2 (S208).

Next, the LTE base station apparatus a2 transmits a handover request to the W-CDMA base station apparatus c2 (S209). When allowing the handover, the W-CDMA base station device c2 transmits information permitting the handover to the LTE base station device a2 (S210). The LTE base station apparatus a2 transmits information for instructing handover to the mobile phone apparatus b2 (S211).
Next, the cellular phone device b2 hands over to the W-CDMA base station device c2 (S212). Then, the cellular phone device b2 performs a voice call using the circuit switching method via the W-CDMA base station device c2 (S213).

Thus, according to the present embodiment, the mobile station apparatus b2 responds to a communication service request for requesting a communication service based on the packet switching method from the LTE base station apparatus a2 with the line with the W-CDMA base station apparatus c2. A change request for changing to a communication service using an exchange method is transmitted. Thereby, the mobile station apparatus can select a communication method. A communication service with a different communication method can be started without starting the communication service with the communication method of the base station device in which the mobile station device was located.
Also, the mobile station device b2 can change to communication using the circuit switching method while the radio resource layer is connected.

(Third embodiment)
Hereinafter, a third embodiment of the present invention will be described with reference to the drawings.
In each of the above embodiments, after the mobile phone device receives the short message service SMS incoming notification, the radio communication system connects the radio resource layer to receive the short message service SMS message information, and disconnects the radio resource layer. Further, after disconnecting the radio resource layer, the mobile phone device requests communication using Voice over IP VoIP, connects the radio resource layer again, and makes a handover request.
In the present embodiment, after the mobile phone device receives the incoming call notification, it connects the radio resource layer to make a handover request.
In addition, the conceptual diagram of a communication system is the same as FIG. 1 of 1st Embodiment similarly to 2nd Embodiment. Further, the W-CDMA base station apparatus C of the present embodiment is the same as the W-CDMA base station apparatus c2 of the second embodiment.

  Hereinafter, the LTE base station apparatus A and the mobile phone apparatus B according to the present embodiment will be described. The LTE base station apparatus A is the LTE base station apparatus a3, and the mobile phone apparatus B is the mobile phone apparatus b3.

First, the LTE base station apparatus a3 will be described.
FIG. 10 is a schematic block diagram showing the configuration of the LTE base station apparatus a2 according to the present embodiment.
When the LTE base station apparatus a3 (FIG. 10) according to the present embodiment is compared with the LTE base station apparatus a2 (FIG. 6) according to the second embodiment, only the control unit a33 is different. However, since the functions of other components (reception antenna a11, reception unit a12, storage unit a14, communication unit a15, transmission unit a16, and transmission antenna a17) are the same as those in the second embodiment, A description of the same functions as those in the embodiment is omitted.

When the incoming information for the mobile phone device b3 located in the cell is input from the communication unit a15, the control unit a33 stores the input incoming information in the incoming information storage unit a141 of the storage unit a14. .
The control unit a33 includes a communication service request unit a331, an incoming call information transmission unit a232, and a handover control unit a233.
The functions of the incoming information transmission unit a232 and the handover control unit a233 are the same as those in the second embodiment, and thus description thereof is omitted.

The communication service request unit a331 generates communication service request information for the mobile phone device when the incoming information to the mobile phone device located in the cell is input from the communication unit a15, and transmits the communication service request information to the mobile phone device do.
For example, when information requesting a voice call using voice over IP VoIP is input from the communication unit a15 to the mobile phone device b3 located in the cell, the communication service request unit a331 generates a VoIP incoming call notification. The communication service request unit a331 transmits to the mobile phone device b3 via the transmission unit a16. Here, the VoIP incoming call notification is a notification for connecting the radio resource layer immediately after the mobile phone device b3 receives the VoIP incoming call notification.

  The control unit a33 is realized by reading and executing a program held in the storage unit a14 or by an electronic circuit.

Next, the cellular phone device b3 will be described.
FIG. 11 is a schematic block diagram showing the configuration of the mobile phone device b3 according to the present embodiment.
When the cellular phone device b3 (FIG. 11) according to the present embodiment is compared with the cellular phone device b2 (FIG. 7) according to the second embodiment, only the receiving unit b32 and the control unit b33 are different. However, the functions of the other components (reception antenna b11, storage unit b14, transmission unit b15, and transmission antenna b16) are the same as in the second embodiment, so the description of the same functions as in the second embodiment is as follows. Omitted.

  The reception unit b32 down-converts the reception signal input from the reception antenna b11 from a radio frequency signal to a baseband signal, and then demodulates the reception information converted into a digital signal by analog / digital conversion to control the control unit b33. Output to.

The receiving unit b32 includes a communication service request detecting unit b321.
The communication service request detection unit b321 detects a communication service request for requesting communication using a packet switching method.
For example, the communication service request detection unit b321 detects that the LTE base station apparatus a3 receives a VoIP incoming call notification and that the communication service request is request information for a voice call using voice over IP VoIP.

The control part b33 is comprised including the base station information acquisition part b131 and the communication system change part b332.
Since the function of the base station information acquisition unit b131 is the same as that of the first embodiment, description thereof is omitted.

The communication method change unit b332 is a communication service based on the packet switching method in which the communication service availability information stored in the communication availability information storage unit b141 of the storage unit b14 is the communication service requested by the communication service request detected by the communication service request detection unit b321. In the case of information indicating that the communication is not possible, a change request for changing to a communication service based on the circuit switching method is transmitted to the LTE base station apparatus a3.
That is, the communication method change unit b332 causes the transmission unit b15 to transmit a change request for changing to a communication service based on the circuit switching method in response to the communication service request detected by the communication service request detection unit b321.

For example, when the VoIP incoming notification detected by the communication service request detection unit b321 is input, the communication method change unit b332 receives the communication service availability information from the communication availability information storage unit b141 for the voice call using the voice over IP VoIP. read out.
The communication system changing unit b332 stores the base station information stored in the base station information storage unit b142 when the communication service availability information for the voice call using the voice over IP VoIP is information indicating that the communication service cannot be performed. From the device information, a base station device that performs circuit switching communication is searched.

As a result of the search, the communication system changing unit b332 identifies a base station apparatus that performs communication in the circuit switching system. The communication method changing unit b332 uses the request information (handover request) for communicating between the mobile phone device and the specified base station device as the change request information, and transmits the request to the base station device that has requested the communication service. To send through.
For example, the communication method change unit b332 identifies the W-CDMA base station device c1 that performs circuit switching communication and makes a handover request to the LTE base station device a3.

When making a handover request, the communication method changing unit b332 transmits information on the base station apparatus that has made the communication service request to the base station apparatus that makes the handover request.
That is, the handover request that is a change request includes information that causes the information on the first base station device to be transmitted to the second base station device.
For example, the communication method change unit b332 transmits the information of the LTE base station device a3 that has requested the communication service stored in the base station information storage unit b142 to the LTE base station device a3 via the transmission unit b15. The LTE base station apparatus a3 that has received the information transmits information on the LTE base station apparatus a2 to the W-CDMA base station apparatus c2. In addition, when making a handover request, the transmission unit b15 makes a handover request while maintaining a connection with the radio resource layer connected when receiving the VoIP incoming call notification.

  The receiving unit b32 and the control unit b33 are realized by reading and executing a program held in the storage unit b14 or by an electronic circuit.

Hereinafter, the operation of the wireless communication system will be described.
FIG. 12 is a flowchart showing the operation of the wireless communication system according to the present embodiment.
When the operation of the present embodiment (FIG. 12) and the operation of the second embodiment (FIG. 9) are compared, Steps S301 to S303 are different. However, since other operations (S208 to S213) are the same as those in the second embodiment, description of the same operations as those in the second embodiment is omitted.

  First, the cellular phone device b3 waits for communication from the LTE base station device a3 (S301). Note that the cellular phone device b3 acquires the information on the LTE base station device a3 and the information on the LTE base station device a3 and the information on the W-CDMA base station device c2, respectively, by cell search based on the information. It is done.

  Next, the LTE base station device a3 receives a request for voice call using VoIP to the mobile phone device b3, and notifies the mobile phone device b3 of a VoIP incoming call (S302). Next, the cellular phone device b3 connects the radio resource layers (S303).

  Thus, according to the present embodiment, the mobile station apparatus b3 responds to a communication service request for requesting a communication service based on the packet switching method from the LTE base station apparatus a3 with the line with the W-CDMA base station apparatus c2. A change request for changing to a communication service based on an exchange method is transmitted. Thereby, it is possible to start a communication service with a different communication method without starting the communication service with the communication method of the base station device in which the mobile station device was located.

(Fourth embodiment)
Hereinafter, a fourth embodiment of the present invention will be described with reference to the drawings.
In each of the above-described embodiments, after receiving the incoming call notification (communication service request), the mobile phone device makes a change request to change to a communication service based on the circuit switching method.
In this embodiment, before requesting a communication service, the mobile phone device requests the base station device to change in advance to the communication service using the circuit switching method, and implements the communication service using the circuit switching method.
The conceptual diagram of the communication system is the same as FIG. 1 of the first embodiment. Further, the W-CDMA base station apparatus C is the same as the W-CDMA base station apparatus c2 of the second embodiment, as in the third embodiment.

  Hereinafter, the LTE base station apparatus A and the mobile phone apparatus B according to the present embodiment will be described. The LTE base station apparatus A is the LTE base station apparatus a4, and the mobile phone apparatus B is the mobile phone apparatus b4.

First, the LTE base station apparatus a4 will be described.
FIG. 13 is a schematic block diagram showing the configuration of the LTE base station apparatus a4 according to this embodiment.
When the LTE base station apparatus a4 (FIG. 13) according to the present embodiment is compared with the LTE base station apparatus a3 (FIG. 10) according to the third embodiment, only the control unit a43 and the storage unit a44 are different. However, since the functions of other components (reception antenna a11, reception unit a12, communication unit a15, transmission unit a16, and transmission antenna a17) are the same as those in the third embodiment, they are the same as those in the third embodiment. A description of the function is omitted.

When the incoming information for the cellular phone device b4 located in the cell is input from the communication unit a15, the control unit a43 stores the input incoming information in the incoming information storage unit a141 of the storage unit a44.
The control unit a43 includes a communication service request unit a331, an incoming call information transmission unit a232, and a handover control unit a433.
The functions of the communication service request unit a331 and the incoming call information transmission unit a232 are the same as those in the third embodiment, and a description thereof will be omitted.

  The handover control unit a433 receives from the mobile phone device a change request for changing the communication service based on the packet switching method to the communication service based on the circuit switching method, and stores the change request for the mobile phone device based on the packet switching method. Is a communication service for which the change request has been made, the mobile phone device is handed over to a peripheral base station device that provides a communication service using a circuit switching method. In addition, the information of the surrounding base station apparatus is previously memorize | stored in the memory | storage part a44.

  For example, the handover control unit a433 receives communication service availability information (change request) of the mobile phone device b4 from the mobile phone device b4 via the receiving unit c12. When the change request is input, the handover control unit a433 stores the mobile station information including the identification information of the mobile phone device b4 and the communication service availability information of the mobile phone device b4 in the mobile station information storage unit a442. .

When the incoming call information to the mobile phone device is input from the communication unit a15, the handover control unit a433 reads the mobile station information of the mobile phone device from the mobile station information storage unit a442. The handover control unit a433 is the communication service availability information of the read mobile station information, and the information corresponding to the communication service of the incoming call information is information indicating that the communication service by the packet switching method cannot be performed. The information of the surrounding base station apparatus memorize | stored in the memory | storage part a44 is read. The handover control unit a433 specifies a peripheral base station apparatus that performs a communication service using a circuit switching method, from the read information of the peripheral base station apparatus.
The handover control unit a433 transmits a handover request for the mobile station device to the identified base station device via the communication unit a15 and the mobile phone network D.

For example, the handover control unit a433 receives information requesting a voice call using the voice over IP VoIP from the communication unit a15 to the mobile phone device b4, and stores the mobile phone device b4 stored in the mobile station information storage unit a442. When the communication service availability information is information indicating that a voice call using Voice over IP VoIP cannot be performed, the W-CDMA base station apparatus c2 that performs the communication service by the circuit switching method is specified.
The handover control unit a433 transmits a handover request to the specified W-CDMA base station device c2 via the communication unit a15.

  Further, when the handover permission information transmitted from the W-CDMA base station device c2 is input from the communication unit a15, the handover control unit a433 generates information necessary for the mobile phone device b2 to perform handover. Then, the handover control unit a433 transmits information necessary for the generated cellular phone device b4 to perform handover to the cellular phone device b4 via the transmission unit a16.

The control unit a43 is realized by reading and executing a program held in the storage unit a14 or by an electronic circuit.
The storage unit a44 holds data and is realized using a magnetic hard disk device or a semiconductor memory.

Next, the cellular phone device b4 will be described.
FIG. 14 is a schematic block diagram showing the configuration of the mobile phone device b4 according to the present embodiment.
When the cellular phone device b4 (FIG. 14) according to the present embodiment is compared with the cellular phone device b3 (FIG. 11) according to the third embodiment, only the control unit b43 is different. However, since the functions of other components (reception antenna b11, reception unit b12, storage unit b14, transmission unit b15, and transmission antenna b16) are the same as those in the third embodiment, they are the same as those in the third embodiment. A description of the function is omitted.

The control part b43 is comprised including the base station information acquisition part b131 and the communication system change part b432.
Since the function of the base station information acquisition unit b131 is the same as that of the third embodiment, the description thereof is omitted.

  The communication method change unit b432 transmits the communication service availability information stored in the communication availability information storage unit b141 as a change request to the base station device of the cell in which it is located, and transmits it to the base station device that performs packet switching communication. To do.

When the communication method changing unit b432 is in the cell, the communication method changing unit b432 determines whether or not the communication method used by the base station apparatus of the cell that is in the region is the packet switching method from the information stored in the base station information storage unit b142. . When the communication method used by the base station device of the cell in the service area is a packet switching method, the communication method change unit b432 sends the communication service availability information stored in the communication availability information storage unit b141 to the base station device as a change request. On the other hand, it transmits via the transmission part b15.
That is, the communication method changing unit b432 sends a change request for changing to a communication service based on the circuit switching method (second communication method) to the LTE base station device (first base station device) in advance before the communication service request. On the other hand, it transmits via the transmission part b15.

For example, when the communication method changing unit b432 is located in the cell of the LTE base station device a4, the communication method changing unit b432 specifies that the communication method used by the LTE base station device a4 is a packet switching method. Then, the communication method change unit b432 transmits the communication service availability information stored in the communication availability information storage unit b141 as a change request to the LTE base station apparatus a4.
The change request is included in the location registration information, which is information for registering that the mobile phone device b4 is in the LTE base station device a4 when the mobile phone device b4 is in the cell of the LTE base station device a4. May be.

  Note that the control unit b43 is realized by reading and executing a program held in the storage unit b14 or by an electronic circuit.

Hereinafter, the operation of the wireless communication system will be described.
FIG. 15 is a flowchart showing the operation of the wireless communication system according to the present embodiment.
First, when the cellular phone device b4 is located in the cell of the LTE base station device a4, the mobile phone device b4 specifies the communication method of the LTE base station device a4. As a result of the identification, the cellular phone device b4 identifies that the communication used by the LTE base station device a4 is a packet switching method, and connects the LTE base station device a4 and the radio resource layer (S401).

Next, when transmitting the location registration information to the LTE base station device a4, the mobile phone device b4 makes a change request for changing to a communication service based on a circuit switching method, and the LTE base station device a4 The identification information and the change request information are stored (S402). Then, the cellular phone device b4 disconnects the radio resource layer from the LTE base station device a4 (S403).
In addition, the mobile phone device b4 enters a state of waiting for communication from the LTE base station device a4 (S404).

  Next, the LTE base station apparatus a4 receives the voice call request using the voice over IP VoIP to the mobile phone apparatus b4, and notifies the mobile phone apparatus b4 of a VoIP incoming call (S405). The cellular phone device b4 connects the LTE base station device a4 and the radio resource layer (S406). Further, the LTE base station apparatus a4 transmits a handover request to the W-CDMA base station apparatus c2 (S407). When allowing the handover, the W-CDMA base station device c2 transmits information permitting the handover to the LTE base station device a4 (S408).

Then, the LTE base station apparatus a4 transmits a handover command to the mobile phone apparatus b4 (S409).
Next, the cellular phone device b4 hands over to the W-CDMA base station device c2 (S411). Then, the mobile phone device b1 performs communication using the circuit switching method via the W-CDMA base station device c2 (S411).

  Thus, according to the present embodiment, the mobile phone device b4 makes a change request for changing to a communication service based on a circuit switching method in advance before requesting a communication service. Thereby, before making a communication service request to the mobile phone device, the communication method can be changed, and the time until the mobile station device starts the communication requested for the communication service can be shortened.

(Fifth embodiment)
Hereinafter, a fifth embodiment of the present invention will be described with reference to the drawings.
In each of the above embodiments, an incoming call has occurred in the wireless communication system while the mobile phone device is waiting.
In the present embodiment, the mobile phone device receives an incoming call during communication by the packet switching method, and makes a handover request.
In addition, the conceptual diagram of a communication system is the same as FIG. 1 of 1st Embodiment similarly to 3rd Embodiment. Further, the LTE base station apparatus A and the W-CDMA base station apparatus C are the same as the LTE base station apparatus a3 and the W-CDMA base station apparatus c2 of the third embodiment, respectively.

Hereinafter, the cellular phone device B according to the present embodiment will be described. The mobile phone device B is assumed to be a mobile phone device b5.
FIG. 16 is a schematic block diagram showing the configuration of the mobile phone device b5 according to the present embodiment.
When the cellular phone device b5 (FIG. 16) according to the present embodiment is compared with the cellular phone device b3 (FIG. 11) according to the third embodiment, only the control unit b53 is different. However, since the functions of other components (reception antenna b11, reception unit b32, storage unit b14, transmission unit b15, and transmission antenna b16) are the same as those in the third embodiment, they are the same as those in the third embodiment. A description of the function is omitted.

The control unit b53 includes a base station information acquisition unit b131 and a communication method change unit b532.
Since the function of the base station information acquisition unit b131 is the same as that of the third embodiment, the description thereof is omitted.

The communication method change unit b532 is a communication service based on the packet switching method in which the communication service availability information stored in the communication availability information storage unit b141 of the storage unit b14 is the communication service requested by the communication service request detected by the communication service request detection unit b121. In the case of information indicating that the communication is not possible, a change request for changing to a communication service based on the circuit switching method is transmitted to the LTE base station apparatus a3.
That is, the communication method change unit b532 causes the transmission unit b15 to transmit a change request for changing to a communication service based on the circuit switching method in response to the communication service request detected by the communication service request detection unit b121.

For example, when the VoIP incoming notification detected by the communication service request detection unit b321 is input, the communication method change unit b532 receives the communication service availability information from the communication availability information storage unit b141 for the voice call using the voice over IP VoIP. read out.
The communication system changing unit b532 stores the base station stored in the base station information storage unit b142 when the communication service availability information for the voice call using the voice over IP VoIP is information indicating that the communication service cannot be performed. From the device information, a base station device that performs circuit switching communication is searched.

As a result of the search, the communication system changing unit b532 specifies a base station apparatus that performs communication in the circuit switching system.
The communication method changing unit b532 determines whether or not the mobile phone device is communicating by packet switching communication. The communication method changing unit b532 determines whether or not the base station device that performs the communication of the specified circuit switching method supports the packet switching method communication when the mobile phone device is communicating by the packet switching method communication. to decide.

When the base station apparatus that performs communication of the specified circuit switching system also supports communication of the packet switching system, the communication system changing unit b532 performs the communication of the specified circuit switching system with the mobile phone device. Is transmitted as change request information to the base station apparatus in communication via the transmission unit b15.
On the other hand, when the base station apparatus that performs the communication of the specified circuit switching method does not support the communication of the packet switching system, the communication method changing unit b532 performs the communication of the specified circuit switching system with the own mobile phone device. A handover request for communicating with the station apparatus by the circuit switching method is output to the transmitter b15. In this case, the mobile phone device continuously performs communication by the packet switching method during communication with the base station device during communication.

For example, the communication method changing unit b532 communicates with the LTE base station apparatus a3 by communication using the packet switching method, and when there is a voice call request using Voice over IP VoIP, the base station information storage unit b142 Is searched for a base station apparatus that performs communication in the circuit switching system, and the communication system changing unit b532 specifies the W-CDMA base station apparatus c2 that performs communication in the circuit switching system. The communication scheme change unit b532 refers to the communication scheme of the W-CDMA base station apparatus c2 stored in the base station information storage unit b142.
In this embodiment, since the W-CDMA base station device c2 supports packet-switched communication, the communication method changing unit b532 connects the mobile phone device b5 and the W-CDMA base station device c2 to the line. A handover request for communication using the exchange method and the packet exchange method is transmitted to the LTE base station apparatus a3 via the transmission unit b15.
If the communication method of the W-CDMA base station device c2 does not correspond to the packet switching method, the communication method changing unit b532 exchanges the own mobile phone device b5 and the W-CDMA base station device c2 with circuit switching. A handover request for communication using the method is transmitted to the LTE base station apparatus a3 via the transmission unit b15. In this case, after the handover, the cellular phone device b5 continues to perform packet switching communication via the LTE base station device a3, and performs voice communication by the circuit switching method via the W-CDMA base station device c2.

  Note that the control unit b53 is realized by reading and executing a program held in the storage unit b14 or by an electronic circuit.

Hereinafter, the operation of the wireless communication system will be described.
FIG. 17 is a flowchart showing the operation of the wireless communication system according to the present embodiment.
First, the mobile phone device b5 is communicating with the LTE base station device a3 by packet switching communication (S501).

Next, the LTE base station device a3 receives a request for voice call using VoIP to the mobile phone device b5, and notifies the mobile phone device b5 of a VoIP incoming call (S502).
Next, the cellular phone device b5 transmits a handover request and information on the W-CDMA base station device c2 to the LTE base station device a3 (S503).

Next, the LTE base station apparatus a3 transmits a handover request to the W-CDMA base station apparatus c2 (S504). When allowing the handover, the W-CDMA base station device c2 transmits information permitting the handover to the LTE base station device a3 (S505). The LTE base station device a3 transmits information for instructing handover to the mobile phone device b5 (S506).
Next, the cellular phone device b5 hands over to the W-CDMA base station device c2 (S507).
Then, the cellular phone device b5 continues the packet-switched communication via the W-CDMA base station device c2 (S508). Further, the cellular phone device b1 performs a voice call by the circuit switching method via the W-CDMA base station device c2 (S509).

  Thus, according to the present embodiment, the mobile station apparatus b5 responds to a communication service request for requesting a communication service based on the packet switching method from the LTE base station apparatus a3 with the line with the W-CDMA base station apparatus c2. A change request for changing to a communication service based on an exchange method is transmitted. Thereby, it is possible to start a communication service with a different communication method without starting the communication service with the communication method of the base station device in which the mobile station device was located.

In the first to fourth embodiments, communication is waited. At that time, the mobile phone device B preferentially waits for communication from the W-CDMA base station device C. It may be. Here, in the cell reselection process, a base station apparatus waiting for communication makes a determination based on a threshold value of radio wave reception quality included in broadcast information transmitted by each base station apparatus. That is, the mobile phone terminal B selects a base station apparatus whose radio wave reception quality exceeds the reception quality threshold, makes a cell reselection request, and waits for communication.
For example, the cellular phone device B lowers the threshold of reception quality for selecting the W-CDMA base station device C as a base station device waiting for communication, and conversely, the base station waiting for communication of the LTE base station device A You may make it raise the threshold value of reception quality for selecting as an apparatus.
As a result, the mobile phone apparatus B often selects the W-CDMA base station apparatus C as a base station apparatus that is waiting for communication, and can perform communication using the circuit switching method from the beginning without transmitting a change request. It is possible to shorten the procedure and time of voice incoming.

  Further, in each of the above embodiments, the mobile phone device B stores information on the communication method of each base station device included in the broadcast information transmitted by each base station device, and makes a change request based on the communication method. Yes. For example, a base station device that is difficult to secure resources necessary for communication due to the occurrence of a large amount of communication requires certain resources by reporting information that the communication method of the base station device is only the packet switching method Communication using voice over IP VoIP can be avoided, and a situation where resources necessary for communication become insufficient can be avoided.

  In each of the above embodiments, the W-CDMA base station apparatus C is described as a base station apparatus that performs circuit-switched communication, and the LTE base station apparatus B is illustrated as a base station apparatus that performs only packet-switched communication. The present invention is not limited to this. For example, as a base station apparatus that performs communication in a circuit switching system, a base station apparatus that uses a GSM (Global System for Mobile Communications) system or a CDMA2000 system, or a base station that performs communication only in a packet switching system LTE Advanced system, UWB (Ultra Wide Band) system, and WiMax (Worldwide Interoperability for Microwave), which are being studied as 4G (The 4th Generation) system as a device e Access) may be used as a base station apparatus. Also, a communication system having a circuit switching system may be a base station apparatus dedicated to the W-CDMA packet switching system.

Further, in each of the above embodiments, the case where voice communication is performed using the circuit switching method when voice communication cannot be performed using the packet switching method has been described. However, the present invention is not limited to this. An incoming call from a base station device that has a wide communication area but only low-speed packet communication can be started without a call connection, and communication can be started with a base station device that has a small communication area but can perform high-speed packet communication. . Thereby, there is an advantage that high-speed communication is started with a small delay.
A base station apparatus with a wide communication area is suitable for standby, and a base station apparatus that performs high-speed communication is suitable for communication. A base station device with a wide communication area may have a relatively high charge such as pay-per-use, and a base station device with a narrow communication area may have a relatively low charge such as a flat-rate charge such as a wireless LAN. There is.
In this case, for example, the cellular phone devices b1 to b5 acquire information on the area of the communication area and the communication fee by broadcast information from a plurality of base station devices or cell search, and compare the acquired information. The communication service availability information may be updated and stored. For example, the mobile phone devices b1 to b5 compare the communication charges of the circuit exchange type communication service and the packet exchange type communication service, and information indicating that the communication service cannot be performed for the circuit exchange type communication service having a high communication charge. For the packet exchange type communication service with a low communication fee, information indicating that the communication service can be executed is stored in the communication availability information storage unit b141 as the communication service availability information.

  Note that some of the mobile station devices b1 to b5 in the above-described embodiment, for example, the communication service request detection units b121 and b321 and the communication method change units b132, b232, b332, b432, and b532 may be realized by a computer. good. In that case, the program for realizing the control function may be recorded on a computer-readable recording medium, and the program recorded on the recording medium may be read by a computer system and executed. Here, the “computer system” includes an OS and hardware such as peripheral devices. The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” is a medium that dynamically holds a program for a short time, such as a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line, In this case, it is also possible to include one that holds a program for a certain time, such as a volatile memory inside a computer system that serves as a server or client. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  As described above, the embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the scope of the present invention. It is possible to

1 is a conceptual diagram of a communication system according to a first embodiment of the present invention. It is a schematic block diagram which shows the structure of the LTE base station apparatus by this embodiment. It is a schematic block diagram which shows the structure of the mobile telephone apparatus by this embodiment. It is a schematic block diagram which shows the structure of the W-CDMA base station apparatus by this embodiment. It is a flowchart which shows operation | movement of the radio | wireless communications system by this embodiment. It is a schematic block diagram which shows the structure of the LTE base station apparatus by 2nd Embodiment of this invention. It is a schematic block diagram which shows the structure of the mobile telephone apparatus by this embodiment. It is a schematic block diagram which shows the structure of the W-CDMA base station apparatus by this embodiment. It is a flowchart which shows operation | movement of the radio | wireless communications system by this embodiment. It is a schematic block diagram which shows the structure of the LTE base station apparatus by 3rd Embodiment of this invention. It is a schematic block diagram which shows the structure of the mobile telephone apparatus by this embodiment. It is a flowchart which shows operation | movement of the radio | wireless communications system by this embodiment. It is a schematic block diagram which shows the structure of the LTE base station apparatus by 4th Embodiment of this invention. It is a schematic block diagram which shows the structure of the mobile telephone apparatus by this embodiment. It is a flowchart which shows operation | movement of the radio | wireless communications system by this embodiment. It is a schematic block diagram which shows the structure of the mobile telephone apparatus by 5th Embodiment of this invention. It is a flowchart which shows operation | movement of the radio | wireless communications system by this embodiment.

Explanation of symbols

A, a1, a2, a3 ... LTE base station device B, b1, b2, b3, b4, b5 ... mobile phone device C, c1, c2 ... W-CDMA base station device D ... mobile Telephone network a11: receiving antenna, a12: receiving unit, a13, a23, a33, a43 ... control unit, a14, a44 ... storage unit, a15 ... communication unit, a16 ... transmission Part, a17 ... transmission antenna b11 ... reception antenna, b12, b32 ... reception part, b13, b23, b33, b43, b53 ... control part, b14 ... storage part, b15 ... Transmitter, b16 ... Transmit antenna c11 ... Receive antenna, c12 ... Receiver, c13, c23 ... Control unit, c14 ... Storage unit, c15 ... Communication unit, c16 ... Transmitter, c17 ... transmitting antenna a141 ... incoming call information storage unit, a131, a331 ... communication service request unit, a132, a232 ... incoming call information transmission unit, a233, a433 ... handover control unit, a442 ... mobile station information storage unit b121, b321 ... communication service request detection unit, b131 ... base station information acquisition unit, b132, b232, b332, b432, b532 ... communication method change unit, b133 ... communication availability information update unit, b141 ... communication availability information storage unit, b142 ... base station information storage unit c141 ... incoming call information storage unit, c131, c231 ... incoming call information acquisition unit, c232 ... handover control unit

Claims (16)

A first base station apparatus that communicates using a first communication method; a second base station apparatus that communicates using a second communication system; the first base station apparatus and the second base station apparatus; In a wireless communication system comprising a mobile station device for communication,
The mobile station device
A wireless communication system, comprising: a communication method changing unit that transmits a change request for changing to a communication service according to a second communication method in response to a communication service request for requesting a communication service according to a first communication method. The wireless communication system according to claim 1, wherein the communication method change unit transmits the change request to the second base station apparatus. The change request includes information for the second base station apparatus to acquire information for communicating with a mobile station apparatus from the first base station apparatus. Wireless communication system. The wireless communication system according to claim 1, wherein the communication method change unit transmits the change request to the first base station apparatus. The wireless communication system according to claim 4, wherein the change request includes information that causes the information on the first base station device to be transmitted to the second base station device. The wireless communication system according to claim 4 or 5, wherein the communication method change unit transmits the change request in advance before the communication service request. The mobile station device
A communication service request detecting unit for detecting a communication service request for requesting communication of the first communication method;
The communication method change unit transmits a change request for changing to a communication service based on the second communication method in response to the communication service request detected by the communication service request detection unit. The wireless communication system according to any one of the sections. The mobile station device
For each type of communication service, a communication enable / disable information storage unit that stores communication service enable / disable information indicating whether or not the communication service according to the first communication method can be implemented is provided.
The communication method change unit, when the communication service availability information stored in the communication availability information storage unit for the communication service requested by the communication service request is information indicating that the communication service according to the first communication method cannot be performed. The wireless communication system according to any one of claims 1 to 7, wherein the change request is transmitted. The wireless communication system according to claim 8, wherein the mobile station apparatus includes a communication availability information updating unit that updates the communication service availability information. The communication service availability information is information indicating that the communication service according to the first communication method cannot be performed when the mobile station apparatus cannot perform the communication service according to the first communication method. The wireless communication system according to claim 8 or 9. The first communication method is a packet switching method,
The wireless communication system according to any one of claims 1 to 8, wherein the second communication method is a circuit switching method. The area where communication is possible with the communication service according to the first communication method is wider than the area where communication is possible with the communication service according to the second communication method. A wireless communication system according to any of the above sections. The communication charge of the communication service according to the first communication method is a communication charge higher than the communication charge of the communication service according to the second communication method. The wireless communication system according to 1. A first base station apparatus that communicates using a first communication method, a second base station apparatus that communicates using a second communication method, the first base station apparatus, and the second base station In a mobile station device communicating with a device,
A mobile station apparatus comprising: a communication method changing unit that transmits a change request for changing to a communication service according to a second communication method in response to a communication service request for requesting a communication service according to a first communication method. A first base station apparatus that communicates using a first communication method, a second base station apparatus that communicates using a second communication method, the first base station apparatus, and the second base station In a wireless communication method in a wireless communication system comprising a mobile station device that communicates with a device,
A wireless communication method comprising: a step of transmitting a change request for changing the mobile station apparatus to a communication service based on a second communication system in response to a communication service request requesting a communication service based on a first communication system . A first base station apparatus that communicates using a first communication method, a second base station apparatus that communicates using a second communication method, the first base station apparatus, and the second base station A mobile station computer that communicates with the device;
A wireless communication program that functions as means for transmitting a change request for changing to a communication service according to a second communication method in response to a communication service request that requests a communication service according to a first communication method.

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