JP4781979B2 - Wireless communication apparatus and wireless communication method - Google Patents

Description

  The present invention relates to a wireless communication apparatus and a wireless communication method.

  In recent years, there are a plurality of systems corresponding to respective standards in wireless communication devices such as mobile phones. For example, TDMA and CDMA systems are widely used in Japanese mobile phone systems.

  Normally, a wireless communication device is configured to correspond to any one of the standards, but in recent cellular phone systems, for example, the frequency band assigned to each system has become tight as terminals become widespread. Therefore, the transition to multiband is considered. In addition, since it provides a stable and highly functional service, it is possible to perform handoff between different frequency bands, and multi-band / multi-mode communication in which communication is performed using a plurality of communication systems (for example, cdma2000 1x system and 1xEV-DO system). Has also been done.

  As a wireless communication apparatus compatible with such multiband / multimode, for example, a TDMA system and a CDMA system are combined, a TDMA transmission / reception unit and a CDMA transmission unit are coupled to a primary antenna, and a CDMA system is coupled to a secondary antenna. There is known a mobile phone terminal in which the receivers are combined (see, for example, Patent Document 1).

  In addition, recently, an SHDR (Simultaneous Hybrid Dual Receiver) function that performs transmission / reception in the cdma2000 1xEV-DO system with the primary antenna and reception with the secondary antenna at the same time as the cdma2000 1x system is installed, and communication by the primary antenna is performed. A mobile phone terminal compatible with multiband / multimode for improving throughput is also considered.

  FIG. 7 is a functional block diagram showing a schematic configuration of a main part of a mobile phone terminal equipped with such an SHDR function. This cellular phone terminal includes a 1x system (circuit switching system) using a cdma2000 system in the 800 MHz band (hereinafter abbreviated as 800 MHz band as appropriate) and a cdma2000 system in 2 GHz band (hereinafter abbreviated as 2 GHz band as appropriate), and 1xEVDO. It has an EVDO system (packet switching system) based on a method (hereinafter simply abbreviated as EVDO as appropriate) and a GPS frequency reception function of 1575.42 MHz (hereinafter abbreviated as 1.5 GHz band as appropriate) A transmission unit (Tx) 101, a primary reception unit (primary Rx) 102, and a secondary reception unit (secondary Rx) 103 connected to a baseband unit 100 having a modulation circuit and a demodulation circuit are provided.

The transmitter 101 and the primary receiver 102 are connected to the primary antenna 105 via the duplexer 104, and can transmit and receive in the 800 MHz band and the 2 GHz band. The secondary receiving unit 103 is connected to the secondary antenna 106 and can receive signals in the 800 MHz band, the 2 GHz band, and the 1.5 GHz band independently of the primary receiving unit 102.
JP 2004-15162 A

  In the mobile phone terminal having the functions of both the 1x system and the EVDO system described above, there is no incoming call when the communication (packet communication) by the EVDO system is not performed. Therefore, during the voice call by the 1x system, the EVDO system Do not monitor the signal condition. Therefore, when a message for notifying an incoming video-phone call (IPVT: IP Video Telephony) by the EVDO system is received by the 1x system during a voice call by the 1x system, it is determined whether the state of the EVDO system is out of range or within range. Therefore, there is a problem that the user cannot respond to an incoming videophone call because the user is not notified of the incoming call.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a message for notifying an incoming call of the second radio communication system when a call is made in the first radio communication system. An object of the present invention is to provide a wireless communication apparatus and a wireless communication method capable of responding to an incoming call when received by a first wireless communication system.

  In order to achieve the above object, a wireless communication apparatus according to the present invention includes transmission / reception means capable of transmitting / receiving information using a first wireless communication system and a second wireless communication system, and at least the first wireless communication system and the second wireless communication system. And receiving a message indicating an incoming call of the second wireless communication system via the first wireless communication system during a call by the first wireless communication system using the transmission / reception means. Then, it has a control means which performs the system detection process which detects the said 2nd radio | wireless communications system using the said receiving means, It is characterized by the above-mentioned.

  When the second wireless communication system is detected by the system detection process, the control means preferably notifies an incoming call of the second wireless communication system, and the control means transmits the second wireless communication system. When the instruction to respond to the incoming call is received, the call termination process of the first wireless communication system using the transmission / reception means is executed, and the system setting of the second wireless communication system is performed using the transmission / reception means. Preferably it is done.

  The wireless communication method of the present invention includes a transmission / reception means capable of transmitting / receiving information by the first wireless communication system and the second wireless communication system, and receiving information by at least the first wireless communication system and the second wireless communication system. A wireless communication method using a receiving means capable of receiving an incoming call of the second wireless communication system via the first wireless communication system during a call by the first wireless communication system using the transmission / reception means. When the message shown is received, a system detection process for detecting the second wireless communication system is performed using the receiving means.

  In the present invention, when a message for notifying an incoming call of the second wireless communication system is received by the first wireless communication system during a call by the first wireless communication system using the transmission / reception means, Since it is confirmed that it is possible to switch to the wireless communication system 2 and the user is notified of the incoming call, the user can respond to the incoming call.

  Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a functional block diagram showing a schematic configuration of a mobile phone terminal as a wireless communication apparatus of the present invention. As in FIG. 7, the mobile phone terminal of the present embodiment includes a cdma2000 1x first wireless communication system (hereinafter abbreviated as 1x system as appropriate) and a 1xEVDO second wireless communication system (hereinafter appropriately referred to as 1xEVDO) in the 800 MHz band and the 2 GHz band. (Hereinafter, abbreviated as EVDO system as appropriate) and a function of receiving a GPS frequency of 1.5 GHz band.

  A mobile phone terminal shown in FIG. 1 includes a baseband unit 1, a transmission unit (TX) 2, a primary reception unit (primary RX 0) 3, a secondary reception unit (secondary RX 1) 4, a duplexer 5, and a primary antenna 6. A secondary antenna 7, a control unit (control means) 8, a reception antenna control unit 9, a display unit 10, an input unit 11, a telephone microphone 12, and a telephone speaker 13.

  In FIG. 1, a baseband unit 1 having a modulation circuit and a demodulation circuit is connected to a transmission unit (TX) 2, a primary reception unit (primary RX0) 3, and a secondary reception unit (secondary RX1) 4. The transmission unit 2 and the primary reception unit 3 are connected to the primary antenna 6 through the duplexer 5 and can transmit and receive in the 800 MHz band and the 2 GHz band. The secondary receiving unit 4 is connected to the secondary antenna 7 and can receive in the 800 MHz band, 2 GHz band, and 1.5 GHz band independently of the primary receiving unit 3. Here, the transmission / reception means includes a transmission unit 2, a primary reception unit 3, a duplexer 5, and a primary antenna 6. The reception unit includes a secondary reception unit 4 and a secondary antenna 7.

  When the mobile phone terminal described above receives a message indicating an incoming videophone call of the EVDO system via the 1x system during a voice call by the 1x system using the transmission / reception means (RX0 / TX), the receiving means A system detection process for detecting (scanning) the EVDO system using (RX1) is performed.

  FIG. 2 is a sequence diagram illustrating an operation when a message indicating an incoming videophone (IPVT) message is received during a voice call. The control unit (control unit) 8 receives a videophone (IPVT) activation call from the SIP server during a voice call by the 1x system using the transmission / reception unit (RX0 / TX), and receives from the SMS (Short Message Service) server. When a DataBurst message (SMS: IPVT) indicating an incoming videophone call (IPVT) is received via the 1x system, the receiving means (RX1) is used while making a voice call using the transmitting / receiving means (RX0 / TX). Then, detection (scanning) of the EVDO system is started. When the control unit (control unit) 8 detects the EVDO system and confirms that it can be switched to the videophone (IPVT), the control unit (control unit) 8 displays the incoming call on the screen of the display unit 10 and transmits / receives (RX0 / TX). ) Sends a DataBurst message (SMS: Ack) to the 1x system.

  Here, when the user gives an instruction to switch from a voice call based on the 1x system to a videophone (IPVT) based on the EVDO system from the input unit 11 shown in FIG. 1, between the transmission / reception means (RX0 / TX) and the 1x system. A voice order termination process is performed by transmitting / receiving a release order signal. Next, system negotiation processing and packet connection (dial-up connection) processing are performed between the transmission / reception means (RX0 / TX) and the EVDO system. Next, registration (Registration) is performed on the SIP server, and when an INVITE message is sent from the SIP server, Ringing is transmitted to the partner terminal via the SIP server. Further, when a 200 OK response message is transmitted to the counterpart terminal via the SIP server and an ACK message is received from the counterpart terminal, a connection is established with the counterpart terminal, and thereafter, the EVDO system establishes a connection with the counterpart terminal. Videophone (IPVT) is started.

  FIG. 3 is a diagram showing screen transition of the display unit of the mobile phone terminal. (A) has shown the screen of the display part 10 when carrying out the telephone call by a voice telephone. Here, when there is a videophone (IPVT) incoming notification, detection of the EVDO system is started by the receiving means, but videophone incoming notification is not performed during the detection. If the EVDO system is detected, as shown in (b), the characters “Incoming ... Taro Kyocera is receiving a videophone call” are displayed on the screen to notify the user of the incoming videophone call. If the EVDO system is not detected, the user is not notified and the voice call is continued. When the user presses the “TV power” key and gives an instruction to switch to the video phone (IPVT) on the screen shown in (b), the mobile phone terminal performs the voice call end processing and the EVDO system. During the negotiation process and the packet connection process, as shown in (c), the characters “Changing... Voice → TV power” are displayed on the screen. When a connection is established with the other terminal, a videophone video is displayed on the screen as shown in FIG. On the screen shown in (b), if the user ignores the incoming call and the user does not press the key for a certain period of time, or if the user presses the “reject” key, from (b) to (a ) To return to the voice call screen.

  FIG. 4 is a sequence diagram for explaining the operation when the EVDO system cannot be detected after detection of the EVDO system is started on the screen shown in FIG. The control unit (control unit) 8 receives a data burst message (SMS: IPVT) indicating an incoming videophone call (IPVT) via the 1x system during a voice call by the 1x system using the transmission / reception unit (RX0 / TX). Then, detection (scanning) of the EVDO system is started using the receiving means (RX1) while making a voice call using the transmitting / receiving means (RX0 / TX). At this time, the control unit (control unit) 8 starts a timer, and when the EVDO system cannot be detected for a predetermined time, the control unit 8 determines that the detection has failed, and the 1x system from the transmission / reception unit (RX0 / TX) is out of the EVDO range. A message (SMS: Ack) is transmitted.

  FIG. 5 is a sequence diagram for explaining the operation when the user ignores the incoming call and does not press the key for a certain time on the screen shown in FIG. The control unit (control unit) 8 receives a data burst message (SMS: IPVT) indicating an incoming videophone call (IPVT) via the 1x system during a voice call by the 1x system using the transmission / reception unit (RX0 / TX). Then, detection (scanning) of the EVDO system is started using the receiving means (RX1) while making a voice call using the transmitting / receiving means (RX0 / TX). If the EVDO system is detected, the control unit (control means) 8 starts a timer at this time, and if the user does not press the key for a certain period of time, it judges that the incoming call is rejected and transmits / receives means (RX0 / TX) Transmits a data burst message (SMS: Ack) for rejecting the incoming call to the 1x system.

  FIG. 6 is a sequence diagram for explaining the operation when the user presses the “reject” key on the screen shown in FIG. The control unit (control unit) 8 receives a data burst message (SMS: IPVT) indicating an incoming videophone call (IPVT) via the 1x system during a voice call by the 1x system using the transmission / reception unit (RX0 / TX). Then, while making a voice call using the transmission / reception means (RX0 / TX), the reception means (RX1) is used to start detection (scanning) of the EVDO system and detect the EVDO system. The incoming call screen shown in (b) is displayed. At this time, when the user presses the “reject” key, the control unit (control unit) 8 transmits a data burst message (SMS: Ack) for rejecting the incoming call to the 1x system from the transmission / reception unit (RX0 / TX). To do.

As described above, the present invention receives a message when the first wireless communication system receives a message notifying the arrival of the second wireless communication system during a call by the first wireless communication system using the transmission / reception means. Since it is confirmed that the switch to the second wireless communication system can be made using the means and the user is notified of the incoming call, the user can respond to the incoming call.
Further, the present invention is not limited to the application of the above embodiment.

It is a functional block diagram which shows schematic structure of the mobile telephone terminal as a radio | wireless communication apparatus of this invention. FIG. 10 is a sequence diagram illustrating an operation when a message indicating an incoming videophone (IPVT) message is received during a voice call. It is a figure which shows the screen transition of the display part of a mobile telephone terminal. It is a sequence diagram explaining operation | movement when the detection of an EVDO system is started and an EVDO system is not detected. It is a sequence diagram explaining operation | movement when a user ignores an incoming call and does not press a key for a fixed time. FIG. 10 is a sequence diagram illustrating an operation when a user presses a “reject” key. It is a functional block diagram which shows schematic structure of the conventional mobile telephone terminal carrying an SHDR function.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Baseband part 2 Transmission part 3 Primary reception part 4 Secondary reception part 5 Duplexer 6 Primary antenna 7 Secondary antenna 8 Control part 9 Reception antenna control part 10 Display part 11 Input part 12 Microphone 13 Speaker

Claims (4)

Transmitting / receiving means capable of transmitting / receiving information by the first wireless communication system and the second wireless communication system;
Receiving means capable of receiving information by at least the first wireless communication system and the second wireless communication system;
When a message indicating an incoming call of the second wireless communication system is received via the first wireless communication system during a call by the first wireless communication system using the transmission / reception means, the second means is used to receive the second Control means for performing system detection processing for detecting a wireless communication system;
A wireless communication apparatus comprising:   2. The wireless communication apparatus according to claim 1, wherein when the second wireless communication system is detected by the system detection process, the control unit notifies an incoming call of the second wireless communication system.   When the control means receives an instruction to respond to an incoming call of the second wireless communication system, the control means executes a call ending process by the first wireless communication system using the transmission / reception means, and uses the transmission / reception means. The wireless communication apparatus according to claim 1, wherein system setting of the second wireless communication system is performed. Radio communication using transmission / reception means capable of transmitting / receiving information by the first radio communication system and the second radio communication system and at least reception means capable of receiving information by the first radio communication system and the second radio communication system A method,
When a message indicating an incoming call of the second wireless communication system is received via the first wireless communication system during a call by the first wireless communication system using the transmission / reception means, the second means is used to receive the second A wireless communication method comprising performing system detection processing for detecting a wireless communication system.

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