JP2008278053A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve usability without missing an incoming call even in a mass-storage mode. <P>SOLUTION: A portable terminal device (mobile phone 3) includes a communication unit 31 and a control unit 38. The control unit 38 performs control such that when negotiation is requested through a USB interface, the negotiation is performed and the communication unit 31 is disabled to be used and further enabled to be used a predetermined time later and when the communication unit 31 is enabled to be used, an incoming call is monitored. Further, when an instruction associated with data transmission is input through the USB interface, data transmission processing is performed while the communication unit 31 is disabled to be used, but when the communication unit 31 is enabled to be used, a predetermined signal is output through the USB interface without performing the data transmission. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a portable terminal device connected to a host device such as a PC (Personal Computer) via an interface such as a USB (Universal Serial Bus).

  A mass storage device (in this case) is connected to a USB interface of a host device such as a PC by connecting a portable terminal device such as a memory card or the like, which is compatible with a USB communication mass storage class transfer protocol, and mounted on an external memory. USB mass storage technology that can be used as a (removable medium) is known.

  FIG. 7 shows an example of a mass storage mode start / end sequence in the USB mass storage technology. Here, a host device such as a PC, a USB driver and a mass storage application installed in a mobile phone, and a flow of inter-protocol processing for controlling communication are shown. The process flow will be briefly described below.

  First, when a USB cable is connected between the host device and the mobile phone (step S701), the USB driver removes from the host device in order to treat the mobile phone (external memory mounted in) as a mass storage device. A USB cable connection notification is issued to the mass storage application that controls the data folder in response to data reading or writing (step S702). Upon receiving this, the mobile phone activates a mass storage application implemented as one of the application programs (step S703), and displays a screen for prompting the user to select the USB mode (step S704). When mass storage mode selection is performed by a user operation (step S705), a radio wave OFF setting request is issued to the protocol (step S706).

On the other hand, the protocol sets the radio wave OFF and sets the mobile phone to the communication disabled state, and then issues a radio wave OFF setting completion notification to the mass storage application (step S707). A USB mode (mass storage mode) for handling the mobile phone as a USB device is set for the USB driver (step S708). The host device detects that the USB device is connected by pulling up the D + line of the connected USB cable (step S709). Thereafter, the host device and the USB driver negotiate. Processing is executed (step S710).
Here, the negotiation process is a specification check such as an operating speed (12 Mbps or 480 Mbps) that the host device can use with a USB driver mounted on a mobile phone, and an external memory connected to the mobile phone This is a process for recognizing that it operates in the mass storage mode, and the USB driver waits for the completion of the negotiation process and issues a USB negotiation completion notification to the mass storage application (step S712). As a result, data transfer by the USB protocol is started between the host device and the mobile phone.

  On the other hand, when the data transfer is completed or an unexpected situation occurs and the USB cable is disconnected (step S713), the USB driver issues a USB cable disconnection notification to the mass storage application (step S714). In response, the mass storage application issues a radio wave OFF release request to the protocol (step S715), the protocol restores the mobile phone to a communicable state, and notifies the mass storage application of the completion of radio wave OFF release. Is issued (step S716). In response, the mobile phone main body ends the mass storage application, thereby ending the above-described series of mass storage mode start / end sequences (step S717).

Further, using the USB mass storage technology described above, for example, a USB storage device (see, for example, Patent Document 1) that prevents data corruption due to disconnection of a cable during data transfer of the mass storage device, or during data transfer of the mass storage device 2. Description of the Related Art A data transmission system (see, for example, Patent Document 2) that prevents damage to a storage device due to battery exhaustion and data loss is known.
JP 2007-26005 A JP 2004-38411 A

When using a mobile phone as a mass storage device (hereinafter referred to as “mass storage mode”), not only monitoring the above-mentioned cable disconnection or battery exhaustion, but also data reception via wireless communication during data transfer via USB communication, etc. Even when an e-mail is received, there is a concern that the storage area is damaged or data is lost.
For this reason, when the mobile phone is operating in the mass storage mode, for example, as shown in FIG. 7, the start / end sequence of the mass storage mode is temporarily set to the radio wave OFF mode by the user operation (steps S705 to S707). Therefore, wireless communication such as incoming voice call and mail reception is not possible. This misses the opportunity for incoming calls, and the user needs to be aware that wireless communication is not possible when the USB cable is connected and the mass storage mode is selected. For this reason, usability deteriorates.

  An object of the present invention is to provide a mobile terminal device that improves usability without missing an incoming call even in the mass storage mode.

  In order to solve the above-described problems, a mobile terminal device of the present invention is a mobile terminal device connected to a host device via an interface, and includes a communication unit that is wirelessly connected to a network, and a storage unit that stores various data. A control unit that executes an incoming call monitoring process for monitoring an incoming call by the communication unit, and a data transmission process for transmitting data read or written by accessing the storage unit through the interface. When the negotiation is requested via the interface, the negotiation is performed and the communication unit is changed to an unusable state, and when the predetermined time elapses, the communication unit is switched to an available state and the communication unit is used. When it is ready, the incoming call is monitored, and data is transmitted via the interface. When the instruction is input, the data transmission process is performed when the communication unit is not usable, and the predetermined signal is output via the interface without performing the data transmission when the communication unit is usable. Control.

  In the mobile terminal device of the present invention, the control unit may control the communication unit to transition to an unusable state when the incoming call monitoring process is completed.

  In the mobile terminal device of the present invention, in the incoming call monitoring process, the control unit communicates with a mail server connected via the network by the communication unit to check whether unreceived mail is accumulated. You may control as follows.

  The portable terminal device according to the present invention further includes a display unit, and the control unit generates screen information asking whether or not the data transmission process can be completed when a voice incoming call is generated in the incoming call monitoring process. You may control to display on a part.

  In the mobile terminal device of the present invention, when the instruction regarding the data transmission is a read instruction, the control unit performs data reading from the storage unit when the communication unit is in an unusable state, You may control not to perform when a communication part is a usable state.

  Further, in the mobile terminal device of the present invention, the control unit performs data writing to the previous storage unit when the instruction regarding the data transmission is a write instruction, when the communication unit is in an unusable state, You may control not to perform when a communication part is a usable state.

  In the mobile terminal device of the present invention, the interface may support USB communication, and the control unit may output a NAK signal in the USB protocol as the predetermined signal.

  In the mobile terminal device of the present invention, the interface may support USB communication, and the control unit may output a NYET signal in the USB protocol as the predetermined signal.

  ADVANTAGE OF THE INVENTION According to this invention, even if it is in mass storage mode, the portable terminal device which aimed at the improvement of usability without missing an incoming call can be provided.

  FIG. 1 is a diagram for explaining a USB connection form between a mobile terminal device and a host device according to an embodiment of the present invention. Here, a mobile phone 3 in which an external memory (a storage unit 37 to be described later) is mounted is illustrated as a mobile terminal device according to an embodiment of the present invention.

  As shown in FIG. 1, the mobile phone 3 and the PC 1 as the host device have the USB interfaces 10 and 30 mounted in the slots, respectively, and both of them have a pair of signal lines (D +, D−) and a pair of power supplies. It is connected via a USB cable 2 composed of at least four cables including lines (Vcc, GND). It is assumed that the mobile phone 3 is mounted with an external memory (a storage unit 37 described later) such as a memory card used as a mass storage device.

FIG. 2 is a block diagram showing an internal configuration of the mobile phone 3 shown in FIG. As shown in FIG. 2, the mobile phone 3 is connected to the PC 1 via the USB interface 30 and to a network side device (such as a mail server described later) including a base station (not shown) via a network (not shown). Each is connected and communicates with the PC 1 via the USB interface 30 and communicates according to a predetermined protocol with the communication system captured with the network side device described above.
Therefore, the mobile phone 3 includes a communication unit 31, an operation unit 32, an audio processing unit 33, a speaker (SP) 34, a microphone (MIC, hereinafter referred to as a microphone) 35, a display unit 36, and a storage unit 37. And the control unit 38.

  The communication unit 31 captures a plurality of communication systems and performs wireless communication with a network side device including a base station (not shown) connected to the communication network according to a communication protocol such as CDMA2000 1x or EVDO.

  The operation unit 32 includes keys to which various functions are assigned, such as a power key, a call key, a numeric key, a character key, a direction key, a determination key, and a call key, for example. Is operated, the signal corresponding to the operation content is generated and input to the control unit 38 as a user instruction.

The audio processing unit 33 processes an audio signal output from the SP 34 and an audio signal input from the MIC 35.
That is, the audio processing unit 33 amplifies the audio input from the MIC 35, performs analog / digital conversion, performs signal processing such as encoding, converts the audio into digital audio data, and outputs the digital audio data to the control unit 38.
The audio processing unit 33 performs signal processing such as decoding, digital / analog conversion, and amplification on the audio data supplied from the control unit 38, converts the audio data into an analog audio signal, and outputs the analog audio signal to the speaker.

The display unit 36 is configured using, for example, a display device such as a liquid crystal display panel or an organic EL (Electro-Luminescence) panel, and displays an image corresponding to a video signal supplied from the control unit 38.
For example, the display unit 36 has a telephone number of a callee at the time of outgoing call, a telephone number of a callee at the time of incoming call, contents of received mail or outgoing mail, date, time, remaining battery level, success / failure of outgoing call, standby screen, etc. Information and images,
Here, the display unit 36 displays a screen asking whether or not the data transmission process can be completed when an incoming voice call occurs under the control of the control unit 38.

The storage unit 37 stores various data used for processing in the control unit 38. For example, the storage unit 37 includes an application program executed by the control unit 38, an address book for managing personal information such as a telephone number and an e-mail address of a communication partner, a voice file for reproducing a ring tone and an alarm sound, and a standby screen Image files, various setting data, and temporary data used in the program processing. The storage unit 37 shown here has a role as an external memory in FIG. 1 in which various files are temporarily stored in addition to a role as a main memory in which an application program resides.
The storage unit 37 includes, for example, a nonvolatile storage device (nonvolatile semiconductor memory, hard disk device, optical disk device, etc.), a random accessible storage device (eg, SRAM, DRAM), or the like.

The control unit 38 controls the overall operation of the mobile phone. In other words, the control unit 38 performs various processes of the mobile phone (voice calls performed via a circuit switching network, creation and transmission / reception of e-mails, browsing of the Internet Web (World Wide Web) site, etc.) The operation of each block described above (transmission / reception of signals in the communication unit 31, input / output of audio in the audio processing unit 33, so that control as a storage device) is executed in an appropriate procedure according to the operation of the operation unit 32 Display of the image on the display unit 36).
The control unit 38 includes a computer (microprocessor) that executes processing based on a program (operating system, application program, etc.) stored in the storage unit 37, and performs the above-described processing according to a procedure instructed in this program. Execute. That is, the control unit 38 sequentially reads instruction codes from programs such as an operating system and application programs stored in the storage unit 37 and executes processing.

The control unit 38 also has a function of executing an incoming call monitoring process for monitoring an incoming call by the communication unit 31 and a data transmission process for accessing the storage unit 37 and transmitting data read or written by the USB interface 30.
Specifically, when the negotiation is requested via the USB interface 30, the control unit 38 performs the negotiation, sets the communication unit 31 to the radio wave OFF mode, makes a transition to the unusable state, and further passes a predetermined time. Then, the radio wave OFF mode is canceled and the communication unit 31 is switched to the usable state. When the communication unit 31 is in the usable state, incoming call monitoring is performed, and when an instruction regarding data transmission is input via the USB interface 30. When the communication unit 31 is in an unusable state, data transmission processing is performed, and when the communication unit 31 is in an unusable state, data transmission is not performed and, for example, a predetermined signal such as a NAK signal or a NYET signal in the USB protocol is output via the USB interface 30 Control to do.

  By the way, the radio wave OFF is a function of stopping transmission / reception of radio waves from the communication unit 31. This is a state in which the transmission / reception operation of the communication unit 31 is stopped when a radio wave OFF is requested from an application program that manages a communication protocol for performing communication with the network. Of course, wireless communication is not performed in this state.

  Therefore, the control unit 38 includes a main control unit 380, a USB driver control unit 381, a mass storage class control unit 382, and a communication processing unit 383 so that the internal configuration is expanded and shown. Is done.

  The main control unit 380 serves as a control center when executing an incoming call monitoring process for monitoring incoming calls by the communication unit 31 and a data transmission process for accessing the storage unit 37 and transmitting data read or written by the USB interface 30. , And control the sequence for that.

  The USB driver control unit 381 executes and controls USB driver software prepared for performing negotiation processing according to the USB protocol and token / data / packet transfer processing, and the mass storage class control unit 382 includes a storage unit. In order to handle the device 37 as a mass storage device, a mass storage application (hereinafter simply referred to as MSAPL) that controls a data folder in response to reading or writing of data from the PC 1 in cooperation with the USB driver control unit 381 described above. It has a function to control execution.

  The communication processing unit 383 has a function of executing an incoming call monitoring process according to control by the main control unit 380 based on an instruction from the mass storage class control unit 382, and transitioning the communication unit 31 to an unusable state when the incoming call monitoring process is completed. Have. Here, the incoming call processing refers to communication with a network side device (here, a mail server) connected to the network via the communication unit 31 and confirming whether or not unreceived mail is accumulated.

  The main control unit 380 executes MSAPL by the mass storage class control unit 382, and when the instruction regarding data transmission is a read instruction, the data reading from the storage unit 37 is performed when the communication unit 31 is in an unusable state. It is not performed when the communication unit 31 is in a usable state. When the instruction regarding data transmission is a write instruction, data writing to the storage unit 37 is performed when the communication unit 31 is in an unusable state and is not performed when the communication unit 31 is in a usable state. Details will be described below.

3 to 6 are diagrams for explaining the operation of the mobile terminal device according to the embodiment of the present invention. The radio wave OFF release sequence during data writing (FIG. 3) and the radio wave OFF during data reading are shown. A release sequence (FIG. 4), a radio wave OFF release sequence during data writing during high-speed transfer (FIG. 5), and a sequence (FIG. 6) when there is an incoming call during the mass storage mode are shown.
3 to 6, the host device (PC1), the mobile phone 3 (USB driver (USB driver control unit 381), MSAPL (mass storage class control unit 382)), and network side device (mail server). The flow of operation between is shown.

  Hereinafter, the operation of the mobile terminal device according to the embodiment of the present invention shown in FIGS. 1 and 2 will be described in detail with reference to the sequence diagrams shown in FIGS.

  First, the radio wave OFF canceling operation during data writing will be described with reference to the sequence diagram of FIG.

First, the USB cable 2 is connected between the PC 1 and the USB interfaces 10 and 30 of the mobile phone 3, and when starting USB transfer between these devices, the control unit 38 (USB driver control unit of the PC 1 and the mobile phone 3). 381), a USB negotiation process is executed.
Here, the USB negotiation processing is, for example, as shown in the sequence diagram of FIG. 7, when the PC 1 detects the connection of the mobile phone 3 (for example, by pull-up connection of the D + line of the USB cable 2). The specification of the operating speed (12 Mbps or 480 Mbps) that can be used with the USB driver mounted on the mobile phone 3 is confirmed, and the external memory (the storage unit 37 in FIG. 2) connected to the mobile phone 3 is mass storage. This is processing for recognizing operation in the mode (step S301).

  When the above-described negotiation process is completed, the USB driver control unit 381 (USB driver) issues a USB negotiation completion notification to the MSAPL (mass storage class control unit 382) that is operating (step S302) during radio wave OFF setting. (Step S303). Subsequently, the mass storage class control unit 382 starts the timer monitoring operation by setting an initial value (for example, 1 minute) in the built-in radio wave OFF cancellation timer in order to cancel the radio wave OFF upon receiving the USB negotiation completion notification. (Step S304).

On the other hand, the PC 1 that has finished executing the USB negotiation process issues a data transfer request (WRITE DATA) in the bulk mode to the control unit 38 (USB driver control unit 381) of the mobile phone 3 (step S305), and OUT The token and the transfer data are transmitted (steps S306 and S307, respectively).
Receiving this, the USB driver control unit 381 writes the transfer data in the data area of the storage unit 37 via the main control unit 380 (step S308), and transmits an ACK packet to the PC 1 (step S309).
The PC 1 that has received the ACK packet transmits an OUT token and subsequent transfer data (steps S310 and S311), and the control unit 38 (USB driver control unit 381) of the mobile phone 3 that has received the ACK packet via the USB interface 30 Then, the transfer data is written in the data area of the storage unit 37 via the main control unit 380 (step S312), and an ACK packet is transmitted to the PC 1 (step S313).

  The above operation is repeatedly executed for a predetermined amount of data included in the data transfer request. In the mass storage class control unit 382, the radio wave OFF release timer has been started first, and when the time has expired in the radio wave OFF release timer (step S314), the radio wave OFF release notification is sent to the USB driver control unit 381. That is, a signal for setting the communication unit 31 to the usable state is output (step S315). At the same time, the mass storage class control unit 382 executes radio wave OFF cancellation processing (step S316).

Subsequently, the mass storage class control unit 382 activates the communication processing unit 383 via the main control unit 380, and the communication processing unit 383 makes an inquiry about a new mail to a network side device (mail server) (not shown) (step) S317), the result (presence / absence of new mail or answering machine) is acquired and transferred to the mass storage class control unit 382 via the main control unit 380 (step S318).
Here, if it is confirmed that there is no new mail, the mass storage class control unit 382 performs a radio wave OFF setting process for disabling the communication unit 31 to the communication processing unit 383 via the main control unit 380. This is executed (step S319), and a radio wave OFF setting notification is issued to the USB driver control unit 381 via the main control unit 380 (step S326).

  Incidentally, the PC 1 continues to perform data transfer with the USB driver control unit 381 of the mobile phone 3 (control unit 38), and the USB driver control unit 381 receives the radio wave OFF from the mass storage class control unit 382. After receiving the cancellation notification, the OUT token and transfer data transmitted from the PC 1 are not written to the data area of the storage unit 37, and a NAK packet is transmitted to the PC 1 on the assumption that the data transfer has failed (steps S320 to S320). S322). In contrast, the PC 1 repeats the retransmission (steps S323 and S324), but the USB driver control unit 381 does not write to the data area of the storage unit 37 and returns a NAK bucket each time (step S325).

In addition, after receiving the radio wave OFF setting notification from the mass storage class control unit 382 (step S326), the USB driver control unit 381 receives transfer data transmitted from the PC 1 via the main control unit 380 in the storage unit 37. The transfer data is written in the storage area (steps S327 to S329), and since the communication unit 31 is set to the radio wave OFF mode, an ACK packet is transmitted to the PC1 (step S330). Transmit data to be transmitted.
The control unit 38 (USB driver control unit 381) of the mobile phone 3 that has received this via the USB interface 30 writes the transfer data to the storage area of the storage unit 37 via the main control unit 380 and transmits an ACK packet to the PC 1. . The above operation is repeatedly executed for a predetermined amount of data included in the data transfer request.

  According to the above-described embodiment of the present invention, the mass storage class control unit 382 (MSAPL) has been described as inquiring the mail server via the communication processing unit 383 as to whether or not there is a new mail. 382 (MSAPL) may issue a mail confirmation request to the mail application that is also mounted on the mobile phone 3, and the mail application may inquire the mail server.

  Next, the operation of the radio wave OFF release sequence during data reading will be described with reference to the sequence diagram of FIG.

  First, as in the writing shown in FIG. 3, the USB negotiation process is executed between the PC 1 and the control unit 38 (USB driver control unit 381) of the mobile phone 3. When the negotiation process is completed (step S401), the USB driver control unit 381 (USB driver) sends a USB negotiation completion notification to the MSAPL (mass storage class control unit 382) that is in operation and is operating (step S402). Issue (step S403). Subsequently, in response to the USB negotiation completion notification, the mass storage class control unit 382 sets an initial value to the built-in radio wave OFF cancellation timer and starts timer monitoring (step S404).

On the other hand, the PC 1 that has finished executing the USB negotiation process issues a data transfer request (READDATA) to the control unit 38 (USB driver control unit 381) of the mobile phone 3 (step S405), and issues an IN token ( Step S406).
Receiving this, the USB driver control unit 381 reads necessary data from the data area of the storage unit 37 via the main control unit 380 (step S408), and transfers the data to the PC 1 (step S407). The PC 1 that has received the transfer data transmits an ACK packet to the USB driver control unit 381 (step S409), and further requests the subsequent data by transmitting an IN token (step S410). The mobile phone (USB driver control unit 381) that has received the ACK packet and the IN token reads necessary data from the data area of the storage unit 37 (step S411), and performs data transfer to the PC 1 (step S412).

The PC 1 that has received the data from the USB driver control unit 381 transmits an ACK packet to the USB driver control unit 381 (step S413). Thereafter, the PC 1 requests the subsequent data read by transmitting an IN token, and the USB 1 The driver control unit 381 reads subsequent data from the data area of the storage unit 37 and transfers the read data to the PC 1.
The above operation is repeatedly executed by a predetermined amount of data included in the data transfer request issued from the PC 1.

In the mass storage class control unit 382, the radio wave OFF cancellation timer has been started first, and when the time measurement has expired in the radio wave OFF cancellation timer (step S414), the radio wave OFF cancellation notification is sent to the USB driver control unit 381. That is, a signal for setting the communication unit 31 to the usable state is output (step S415). At the same time, the mass storage class control unit 382 executes a radio wave OFF cancellation process (step S416).
Subsequently, the mass storage class control unit 382 activates the communication processing unit 383 via the main control unit 380, and the communication processing unit 383 makes an inquiry about a new mail to a network side device (mail server) (not shown) (step) In step S417, the result is acquired and transferred to the mass storage class control unit 382 via the main control unit 380 (step S418).

  Here, if it is confirmed that there is no new mail, the mass storage class control unit 382 performs a radio wave OFF setting process for disabling the communication unit 31 to the communication processing unit 383 via the main control unit 380. Then, a radio wave OFF setting notification is issued to the USB driver control unit 381 via the main control unit 380 (step S424).

  Incidentally, the PC 1 continues to perform data transfer with the USB driver control unit 381 of the mobile phone 3 (control unit 38), and the USB driver control unit 381 receives the radio wave OFF from the mass storage class control unit 382. After receiving the cancellation notification, it is assumed that the data transfer by the IN token (step S420) transmitted from the PC 1 has failed, and a NAK packet is transmitted to the PC 1 to wait for retransmission of the data request from the PC 1 (step S421). The PC 1 that has received the NAK packet retransmits the data request using the IN token (step S422), but the USB driver control unit 381 returns the NAK packet each time (step S423).

On the other hand, even after receiving the radio wave OFF setting notification from the mass storage class control unit 382 (step S424), the USB driver control unit 381 retransmits the data request using the IN token (step S425). Since OFF is set, necessary data is read from the data area of the storage unit 37 (step S426), and data transfer to the PC 1 is resumed (step S427).
The PC 1 that has received the data from the mobile phone 3 (USB driver control unit 381) transmits an ACK packet to the USB driver control unit 381 (step S428). Thereafter, the PC 1 reads the data by transmitting an IN token. The USB driver control unit 381 reads the subsequent data from the data area of the storage unit 37 and transfers the read data to the PC 1.

  Next, the operation of the radio wave OFF cancellation sequence during data writing during high-speed transfer will be described with reference to the sequence diagram of FIG.

  High-speed transfer can be recognized by the position of the pull-up resistor of the signal line D + of the USB cable 2 during the USB negotiation process. The sequence diagram shown in FIG. 5 is basically the same as the radio wave OFF release sequence during data writing shown in FIG. 3, but when there is a data transfer request by the OUT token from the PC 1 during the radio wave OFF release, Instead, a response is made with a NYET packet to notify that the next data reception is not ready (step S519), and the PC 1 is notified of the failure of data transfer.

The USB driver control unit 381 notifies the mass storage class control unit 382 that the last data transfer has been completed, and activates the radio wave OFF cancellation processing by the mass storage class control unit 382 (step S521), and new mail to the mail server. Make an inquiry.
On the other hand, the PC 1 transmits a PING packet to inquire whether the USB driver control unit 381 is ready for the next data reception (step S526). The USB driver control unit 381 that has received the PING packet transmits a NAK packet because it is not yet ready for data reception (step S527), and notifies the radio wave OFF setting by executing the radio wave OFF setting process of the mass storage class control unit 382. Wait until retransmission of the PING packet until arriving at (steps S528 and S529).

Since the USB driver control unit 381 receives the radio wave OFF setting notification from the mass storage class control unit 382 (step S525) and then receives the PING packet transmitted by the PC 1 (step S530), the radio wave OFF is set. The PC 1 responds with an ACK packet that it is ready to receive data (step S531).
Thereafter, the mobile phone 3 (USB driver control unit 381) resumes receiving the OUT token and write data from the PC 1 (steps S532 and S533), and writes the data in the data area of the storage unit 37 (step S534). An ACK packet is transmitted (step S535).

Note that the PING and NYET packets described above are packet specifications newly added from USB 2.0, and are free for the PC 1 as the host device to transmit the PING packet and accept data to the mobile phone 3 as the USB device. The mobile phone 3 inquires whether there is a buffer, and if the mobile phone 3 cannot accept data, it receives a NAK packet, if it can accept data, an ACK packet, and if there is no buffer available, the next transfer is accepted immediately. A NYET packet response indicating the absence is made.
In the sequence diagrams shown in FIG. 3 and FIG. 4, when there is a data transfer request from the PC 1 while the radio wave OFF is released, the failure of the data transfer is notified to the PC 1 by responding to the IN / OUT token with a NAK packet, In the case of the high-speed transfer shown in FIG. 5, the data transfer failure is notified to the PC 1 by a NYET response instead of the NAK response, and the data transfer failure is set. The configuration waits for a data transfer retry from the PC 1.

Finally, an operation sequence when there is an incoming call during the mass storage mode will be described with reference to the sequence diagram of FIG.
The mobile phone 3 as a USB device shifts to the radio wave OFF mode when there is no incoming call, and follows the radio wave OFF cancellation sequence during data writing shown in FIG. 3 which responds to the data transfer request from the PC 1 with ACK. However, when an incoming call is received, an indication as to whether or not to end the mass storage mode is displayed on the display unit 36, and the mass storage mode is ended by the user's end selection. The detailed description will be given below.

That is, the mobile phone 3 (communication processing unit 383) first makes an inquiry about new mail via the communication unit 31 to the mail server of the network side device after the radio wave OFF cancellation processing by the mass storage class control unit 382 (step S616). Is performed (step S617). If there is a response from the mail server that there is an incoming voice call (answering machine) or incoming mail (step S618), the communication processing unit 383 sends the response to the mass storage class control unit 382 via the main control unit 380. As a result, the mass storage class control unit 382 generates a message such as “New mail exists / does the mass storage mode end” and displays the message on the display unit 36 via the main control unit 380. (Step S619).
Then, the mass storage class control unit 382 issues a mass storage mode end notification to the USB driver control unit 381 in response to a mass storage mode end selection request acquired by the user operating the operation unit 32 (step S620). ).

Upon receiving the mass storage mode end notification, the USB driver control unit 381 pulls down the D + line of the USB cable 2 to make it appear to the PC 1 as being disconnected from the USB cable (while the power is still supplied), and reconnects the USB cable 2. Is issued (steps S627 and S628).
The PC 1 that has received the reconnection request for the USB cable 2 connects the USB cable 2 in the modem mode to the mobile phone 3 (USB driver control unit 381) that is a USB device in order to end the mass storage mode. Negotiation processing is started (step S629), and modem negotiation is terminated (step S630).

  As described above, according to the mobile terminal device according to the embodiment of the present invention, data can be obtained by performing a NAK response to a data transfer request from the host device at regular intervals even in the mass storage mode. By restricting access to, and automatically checking for new mail and answering machine during that time, users can not receive wireless communication such as incoming voice calls and mail while operating in mass storage mode (radio wave OFF mode) There is no need to be conscious of this, which improves usability. Also, in mass storage mode, not only monitoring of USB cable disconnection or battery exhaustion, but also storage area damage or data loss when there is an incoming voice call or mail reception via wireless communication during USB communication data transfer Is no longer a concern.

  In the portable terminal device according to the above-described embodiment of the present invention, only the mobile phone 3 is illustrated as a mass storage device. However, the same applies to PDAs (Personal Digital Assistants), game machines, and the like having the same configuration. It can be applied to.

  In the above description, the present invention has been described using an example using a USB interface and a USB protocol, but the present invention is not limited to this. The present invention can also be realized by various protocols and interfaces defined by the Bluetooth (trademark) standard, the IrDA standard, and other IEEE standards.

  In addition, the functions of the constituent blocks included in the mobile terminal device according to the embodiment of the present invention shown in FIG. 2 may be realized entirely by software, or at least a part thereof may be realized by hardware. For example, data processing in the communication unit 31, the audio processing unit 33, and the control unit 38 (main control unit 380, USB driver control unit 381, mass storage class control unit 382, communication processing unit 383) is performed by one or more programs using a computer. You may implement | achieve above, You may implement | achieve at least one part with hardware.

It is the figure shown in order to demonstrate the USB connection form of the portable terminal device and host device which concern on embodiment of this invention. It is a block diagram which shows the internal structure of the mobile telephone shown in FIG. It is a figure which shows the electromagnetic wave OFF cancellation | release sequence during the data writing of the portable terminal device which concerns on embodiment of this invention. It is a figure which shows the electromagnetic wave OFF cancellation | release cancellation sequence during the data reading of the portable terminal device which concerns on embodiment of this invention. It is a figure which shows the electromagnetic wave OFF cancellation | release sequence during the data writing at the time of the high speed transfer of the portable terminal device which concerns on embodiment of this invention. It is a figure which shows the operation | movement sequence when there exists an incoming call in the mass storage mode of the portable terminal device which concerns on embodiment of this invention. It is a figure which shows the operation | movement sequence of the conventional mass storage mode start / end.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... PC (host apparatus), 2 ... USB cable, 3 ... Mobile phone (portable terminal device) 10, 30 ... USB interface, 31 ... Communication part, 32 ... Operation part, 33 ... Sound processing part, 34 ... Speaker ( SP), 35 ... Microphone (MIC), 36 ... Display unit, 37 ... Storage unit, 38 ... Control unit, 380 ... Main control unit, 381 ... USB driver control unit (USB driver), 382 ... Mass storage class control unit ( Mass storage application), 383... Communication processing unit.

Claims (8)

A mobile terminal device connected to a host device via an interface,
A communication unit wirelessly connected to the network;
A storage unit for storing various data;
An incoming call monitoring process for monitoring an incoming call by the communication unit, and a control unit for executing a data transmission process for transmitting data read or written by accessing the storage unit through the interface,
The controller is
When negotiation is requested via the interface, the negotiation is performed and the communication unit is changed to an unusable state. After a predetermined time elapses, the communication unit is switched to an available state and the communication unit is usable. When the state is in the state, the incoming call monitoring is performed. When an instruction regarding data transmission is input through the interface, the communication unit performs the data transmission process when the communication unit is in an unusable state, and the communication unit is in the usable state. Control is performed so that a predetermined signal is output via the interface without performing transmission. The controller is
The mobile terminal device according to claim 1, wherein when the incoming call monitoring process is completed, the communication unit is shifted to an unusable state. The controller is
The mobile terminal according to claim 1 or 2, wherein, in the incoming call monitoring process, the communication unit communicates with a mail server connected via the network to check whether or not unreceived mail is accumulated. apparatus. A display unit;
The controller is
The screen information asking whether or not the data transmission process can be completed is generated and displayed on the display unit when an incoming voice call occurs in the incoming call monitoring process. Mobile terminal device. The controller is
When the instruction related to the data transmission is a read instruction, the data reading from the storage unit is performed when the communication unit is in an unusable state and is not performed when the communication unit is in a usable state. The portable terminal device according to claim 1. The controller is
When the instruction related to the data transmission is a write instruction, data writing to the storage unit is performed when the communication unit is in an unusable state, and is not performed when the communication unit is in an available state. The portable terminal device according to claim 1. The interface supports USB communication,
The controller is
The mobile terminal apparatus according to claim 1, wherein a NAK signal in a USB protocol is output as the predetermined signal. The interface supports USB communication,
The controller is
The portable terminal device according to claim 1, wherein a NYET signal in a USB protocol is output as the predetermined signal.

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