JP5727329B2 - Mobile communication terminal, approach notification program, and approach notification method - Google Patents

Description

  The present invention relates to a mobile communication terminal, an approach notification program, and an approach notification method, and more particularly to a mobile communication terminal, an approach notification program, and an approach notification method that perform short-range wireless communication.

An example of a portable communication terminal that performs short-range wireless communication is disclosed in Patent Document 1. In the portable terminal of Patent Document 1, the voice is recognized by the voice sensor, and the voice frequency is sampled. If the audio frequency increases, it is determined that the object is approaching based on the principle of the Doppler effect. At this time, when the user operates the screen while connecting the earphone to the mobile terminal and viewing the music, the ringing of the music is stopped and the alarm sound is output from the earphone.
JP 2010-128789 A [G08B 25/04, H04M 1/00, H04M 11/04]

  However, in the portable terminal of Patent Document 1, when the user approaches a noisy place, it is erroneously determined that the object is approaching. Therefore, although the object is not approaching, the alarm sound is output from the earphone, and the user feels troublesome about the alarm notification.

  Therefore, a main object of the present invention is to provide a novel portable communication terminal, approach notification program, and approach notification method.

  Another object of the present invention is to provide a mobile communication terminal, an approach notification program, and an approach notification method that can appropriately notify an approach.

  The present invention employs the following configuration in order to solve the above problems. The reference numerals in parentheses, supplementary explanations, and the like indicate the corresponding relationship with the embodiments described in order to help understanding of the present invention, and do not limit the present invention.

In the first aspect of the invention, when an earphone is connected, an approach to another communication device is notified using a main sound and a sub sound that can be output during the output of the main sound and is smaller in volume than the main sound. An audio output function for outputting a first sound output as a main sound or a sub sound, a microphone for inputting an ambient sound as a second sound output as a main sound or a sub sound, and a communication device. the acquisition unit for acquiring a radio wave level in a wireless communication, and based on the way when the change of the radio wave level, the first set one of audio and second audio as the main audio, the first audio and second audio as the secondary audio By setting the other, it is a portable communication terminal provided with the notification part which notifies an approach.

In the first invention, a mobile communication terminal (10:.. Reference numerals illustrate corresponding parts in the examples below, the same), for example, have lines of short-range wireless communication Wi-Fi scheme, the earphone is connected When the main audio and the main audio are being output, the approach to the other communication device is notified by using the sub audio that can be output while the main audio is lower than the main audio , for example, the earphone to the earphone jack (24). When the sound output function is executed with the plug inserted, the first sound is output as the main sound from the earphone. The microphone (18) is also used as a microphone for telephone conversation, and collects sound around the user, that is, ambient sound as sub-sound as second sound. Acquisition unit (26, S31, S71) obtains the received radio level received radio wave levels in a wireless communication with the communication device. Notification unit (26, S41, S43), based on the way when the change of the radio wave level and setting one of the first audio and second audio as the main audio and the other of the first audio and second audio as the secondary audio Notification of approach by setting .

According to the first invention, it is possible to accurately detect the approach of a person having a communication device or a vehicle equipped with the communication device. Therefore, it is possible to appropriately notify the person who has the communication device or the approach of the vehicle on which the communication device is mounted.
It is possible to appropriately notify the distance between vehicles and vehicles equipped with communication devices.
Further, by making the ambient sound easy to hear, the user can easily notice the surrounding state.

A second invention is according to the first invention, based on the way when the change of the received radio wave level obtained by the obtained unit preparative sets a first sound as the main audio, cancels the setting for the second audio Accordingly, a stop unit that stops the notification by the notification unit is further provided.

In the second aspect of the invention, stop unit (26, S79), based on the temporal change of the received radio wave level obtained by the obtaining unit sets the first sound as the main audio, cancels the setting for the second audio by, to stop the notification.

  According to the second aspect of the present invention, it is possible to prevent unnecessary notifications when there are no humans or cars approaching the user.

The third invention further comprises a search unit according to the first invention or the second invention, searching for a communication device capable of establishing a short-range wireless communication to each Jo Tokoro time.

In the third invention, the search unit (26, S21, S61) searches for another communication device every 5 seconds in the searchable range .

  A fourth invention is dependent on the third invention, and includes an acceleration sensor that detects the movement of the mobile communication terminal, and a time setting unit that sets a predetermined time short when the movement of the mobile communication terminal is detected by the acceleration sensor. Further prepare.

  In the fourth invention, the acceleration sensor (38) detects the movement of the user carrying the mobile communication device. When the time setting unit (26, S107) detects that the user is moving, the time setting unit (26, S107) sets a predetermined time for repeating the search to be short so that the period for acquiring the reception radio wave level of the communication device is shortened.

  According to the third and fourth aspects of the invention, when the user is moving, the approach of a person or the like who has the communication device can be determined earlier.

A fifth invention is dependent on the third invention or the fourth invention, and the search unit searches for a communication device capable of establishing short-range wireless communication when an earphone is connected to the mobile communication terminal.

In the fifth aspect of the invention, for example, when the earphone plug to Lee ya phone jack is inserted, the search unit starts searching for a communication device.

  According to the fifth aspect, when the user is difficult to notice the surrounding state by using the earphone, it is possible to notify the approach of a person carrying the communication device.

A sixth invention is dependent on any one of the third to fifth inventions , and the search unit is a communication device capable of establishing short-range wireless communication when the connection between the mobile communication terminal and the earphone is released Stop searching.

  According to the sixth aspect of the invention, for example, when the earphone plug is pulled out, the communication device can be prevented from being searched in order not to consume extra power.

A seventh aspect of the invention, to no third invention dependent on any one of the sixth, probe search unit, in a state in which the earphone is connected to the mobile communication terminal, when the first sound is output, the short-range Search for communication devices that can establish wireless communication.

In the seventh invention, for example, the audio output function in a state in which the earphone plug is inserted into the earphone jack first sound from the execution of zero Yahon is Ru is output, the search unit starts to search for the communication device.

  According to the seventh invention, power consumption can be suppressed by not searching for a communication device if the first sound is not heard by the earphone.

Eighth aspect of the present invention is to not first invention dependent on any one of the seventh invention, further comprising a storage unit for storing the music data, the audio output function includes a music player function for reproducing music data, the One sound includes the sound of music data reproduced by the music player function.

In the eighth invention, the storage units (34, 36) include, for example, a flash memory and store music data. When the music player function is executed, music data is read from the flash memory, and the reproduced music is output as the first sound.

A ninth invention is according to the eighth invention, wherein the mobile communication terminal has a communication function for establishing communication with the network, and the music data includes distributed music data distributed through the network by the communication function. .

In the ninth invention, the distribution music data is stored in the storage unit. When the music player function is executed, the distribution music data is reproduced and output as the first sound.

According to the eighth invention or the ninth invention, when the user is listening to music by the music player function that is frequently used, the above-described effects are exerted strongly.
A tenth aspect of the invention is dependent on the first aspect of the invention, and further includes a determination unit that determines a first warning state and a second warning state having a higher degree of danger than the first warning state based on a change in radio wave level over time. The notifying unit sets the first sound as the main sound and the second sound as the sub-voice when the determining unit determines that the first warning state is detected. When the determining unit determines that the second warning state is determined The approach is notified by setting the second sound as the main sound and the first sound as the sub sound.

In an eleventh aspect of the invention, when an earphone is connected, an approach to another communication device is notified by using a main sound and a sub sound that can be output during the output of the main sound and has a volume smaller than the main sound. A sound output function for outputting a first sound output as a main sound or a sub sound, a microphone for inputting an ambient sound as a second sound output as a main sound or a sub sound, and a radio wave level in wireless communication with a communication device The processor (26) of the mobile communication terminal (10) having the acquisition unit (S31, S71) for acquiring the first voice and the second voice as the main voice based on the change over time of the radio wave level. This is an approach notification program that functions as a notification unit (S41, S43) that notifies approach by setting the other of the first sound and the second sound as the sub sound .

In the eleventh invention, as in the first invention, it is possible to accurately detect the approach of a person having a communication device or a vehicle equipped with the communication device. Therefore, it is possible to appropriately notify the person who has the communication device or the approach of the vehicle on which the communication device is mounted.
Further, by making the ambient sound easy to hear, the user can easily notice the surrounding state.

In a twelfth aspect of the invention, when an earphone is connected, an approach to another communication device is notified by using a main sound and a sub sound that can be output during the output of the main sound and has a volume smaller than the main sound. A sound output function for outputting a first sound output as a main sound or a sub sound, a microphone for inputting an ambient sound as a second sound output as a main sound or a sub sound, and a radio wave level in wireless communication with a communication device An approach notification method in the mobile communication terminal (10) having an acquisition unit (S31, S71) for acquiring the first voice and the main voice as the main voice based on the change over time of the radio wave level. set one of the second audio, by setting the other of the first audio and second audio as the secondary audio, performing a notification step of notifying the approach is the approach notification method

In the twelfth invention, similar to the first invention, it is possible to accurately detect the approach of a person having a communication device or a vehicle equipped with the communication device. Therefore, it is possible to appropriately notify the person who has the communication device or the approach of the vehicle on which the communication device is mounted.
Further, by making the ambient sound easy to hear, the user can easily notice the surrounding state.

  According to the present invention, it is possible to accurately detect the approach of a person having a communication device or a vehicle equipped with a communication device, so that the approach of a person carrying the communication device or a vehicle equipped with the communication device is appropriately notified. can do.

  The above object, other objects, features, and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

FIG. 1 is an illustrative view showing an electrical configuration of a mobile phone according to an embodiment of the present invention. FIG. 2 is an illustrative view showing an example of a searchable range and a detection area of a communication device by the short-range wireless communication circuit in FIG. FIG. 3 is an illustrative view showing one example of communication table data stored in the RAM shown in FIG. FIG. 4 is an illustrative view showing one example of movement of a communication device in the detection area shown in FIG. FIG. 5 is an illustrative view showing another example of movement of a communication device in the detection area shown in FIG. FIG. 6 is an illustrative view showing one example of a memory map of the RAM shown in FIG. FIG. 7 is a flowchart showing an example of part of the approach notification process of the first embodiment of the processor shown in FIG. FIG. 8 is an example of another part of the approach notification process of the first embodiment of the processor shown in FIG. 1, and is a flowchart subsequent to FIG. FIG. 9 is an example of another part of the approach notification process of the first embodiment of the processor shown in FIG. 1, and is a flowchart subsequent to FIG. FIG. 10 is a flowchart showing an example of standby processing of the processor shown in FIG. FIG. 11 is a flowchart showing an example of part of the approach notification process of the second embodiment of the processor shown in FIG. FIG. 12 is an example of another part of the approach notification process of the first embodiment of the processor shown in FIG. 1, and is a flowchart subsequent to FIG. FIG. 13 is an example of another part of the approach notification process of the first embodiment of the processor shown in FIG. 1, and is a flowchart subsequent to FIG. FIG. 14 is an illustrative view showing another example of movement of the communication device in the detection area shown in FIG.

<First embodiment>
Referring to FIG. 1, a mobile phone 10 is a kind of mobile terminal, and includes a processor 26 called a computer or a CPU. The processor 26 includes a wireless communication circuit 14, an A / D converter 16, a first D / A converter 20a, a second D / A converter 20b, a key input device 28, a display driver 30, a flash memory 34, a RAM 36, The acceleration sensor 38, the GPS circuit 40, the short-range wireless communication circuit 44, and the like are connected.

  An antenna 12 is connected to the wireless communication circuit 14. A microphone 18 is connected to the A / D converter 16, a speaker 22 is connected to the first D / A converter 20a, and an earphone jack 24 is connected to the second D / A converter 20b. A display 32 is connected to the display driver 30. A GPS antenna 42 is connected to the GPS circuit 40, and a short-range wireless communication antenna 46 is connected to the short-range wireless communication circuit 44. The earphone jack 24 is also connected to the processor 26.

  The processor 26 controls the entire mobile phone 10. The RAM 36 is used as a work area (including a drawing area) or a buffer area of the processor 26. Content data such as characters, images, sounds, sounds, and videos of the mobile phone 10 is recorded in the flash memory 34.

  The A / D converter 16 converts an analog audio signal for audio or sound input through the microphone 18 into a digital audio signal. The first D / A converter 20a converts (decodes) the digital audio signal into an analog audio signal and supplies the analog audio signal to the speaker 22 via an amplifier (not shown). Therefore, sound or sound corresponding to the analog sound signal is output from the speaker 22.

  Similarly, the second D / A converter 20b converts (decodes) the digital audio signal into an analog audio signal, and supplies the analog audio signal to the earphone jack 24 through an amplifier (not shown). The earphone jack 24 is a female terminal, and an earphone plug that is a male terminal may be inserted. When the earphone plug is inserted into the earphone jack 24, a signal indicating the insertion is output to the processor 26. When the processor 26 determines that the earphone plug is inserted, the sound or sound corresponding to the analog audio signal is output from the earphone. For example, when the music player function is executed by the mobile phone 10, the music data read from the flash memory 34 is played and music flows from the earphone.

  The processor 26 controls the amplification factor of the amplifier connected to the first D / A converter 20a so as to adjust the volume of the sound output from the speaker 22, and the amplifier connected to the second D / A converter 20b. The volume of the sound output from the earphone is adjusted by controlling the amplification factor.

  In addition, the music player function of the present embodiment is compatible with sub sound output, and can output music as main sound and output a ring tone, which will be described later, as sub sound. The sub audio is output at a volume smaller than that of the main audio.

  The key input device 28 is called an operation unit, and includes a call key, a function key, an end call key, and the like. In addition, information (key data) on keys operated by the user is input to the processor 26. Further, when each key included in the key input device 28 is operated, a click sound is generated. Therefore, the user can obtain an operational feeling for the key operation by listening to the click sound.

  The display driver 30 controls display on the display 32 connected to the display driver 30 under the instruction of the processor 26. The display driver 30 includes a video memory (not shown) that temporarily stores image data to be displayed.

  The display 32 is provided with a backlight using LEDs as light sources. The backlight is provided on the display panel included in the display 32 based on the edge light method. In addition, although LED is employ | adopted as a light source of a backlight, in another Example, a cold cathode tube etc. may be employ | adopted.

  The wireless communication circuit 14 is a circuit for performing wireless communication by the CDMA method. For example, when the user instructs a telephone call (calling) using the key input device 28, the wireless communication circuit 14 executes a telephone call process under the instruction of the processor 26, and sends a telephone call signal via the antenna 12. Is output. The telephone call signal is transmitted to the other party's telephone through a base station and a communication network (not shown). When an incoming call process is performed at the other party's telephone, a communicable state is established, and the processor 26 executes a call process. Then, when the call process is executed, the other party's voice can be received from the other party's telephone, or this voice can be transmitted.

  When there is an incoming call, the caller information (telephone number or the like) is displayed on the display 32, and a ring tone (sometimes called a ringing melody or an incoming call voice) is output from a speaker (not shown). If a response operation is performed in this state, a communicable state is established, and the processor 26 executes the above-described normal call processing. Furthermore, when a call end operation is performed by the call end key, the processor 26 ends the call process after transmitting a call end signal. However, the processor 26 also ends the call process when a call end signal is received from the mobile communication network regardless of the other party.

  The acceleration sensor 38 is a semiconductor triaxial acceleration sensor, and outputs triaxial (X, Y, Z) acceleration data for the mobile phone 10 to the processor 26. Further, the processor 26 determines whether or not the owner (user) is moving by detecting a change in the triaxial acceleration data. Note that the processor 26 can also calculate the tilt angle of the mobile phone 10 using an inverse trigonometric function with respect to the values indicated by the triaxial acceleration data.

  The GPS circuit 40 is activated when an operation for positioning (acquiring) the current position is performed. The GPS antenna 42 receives a GPS signal transmitted from the GPS satellite 100 and outputs it to the GPS circuit 46. Then, the processor 26 calculates a latitude and a longitude as current position data by executing a positioning process based on the received GPS signal. Thus, in the mobile phone 10, the GPS circuit 40 and the GPS antenna 42 function as a positioning unit, so that the current position can be measured.

  In FIG. 1, only one GPS satellite 100 is drawn for simplicity, but in order to measure the current position, GPS signals must be received from at least three GPS satellites 100. . However, in normal positioning processing, only the latitude and longitude can be calculated because of two-dimensional positioning. However, when GPS signals can be received from the four GPS satellites 100, the altitude can also be calculated by three-dimensional positioning.

  The short-range wireless communication circuit 44 performs Wi-Fi short-range wireless communication. Wi-Fi (Wireless Fidelity) is certified by a predetermined certification authority for the interoperability between wireless devices using the IEEE 802.11 series (IEEE 802.11a / b / g / n, etc.) communication standard. It is a name indicating that That is, Wi-Fi is a method of short-range wireless communication, and the mobile communication terminal 10 of this embodiment uses a Wi-Fi short-range wireless communication circuit 44.

  In Wi-Fi short-range wireless communication, a wired LAN is accessed via a radio wave repeater 48 called an access point (AP), and therefore the close proximity wireless communication circuit 44 has such a radio wave repeater 48. Is automatically searched. When the radio repeater 48 is found by the search, the short-range wireless communication circuit 44 automatically executes a connection process with the radio repeater 48.

  Further, the proximity wireless communication circuit 44 can find not only the radio wave repeater 48 but also other communication devices compatible with Wi-Fi short-range wireless communication by searching.

  FIG. 2 is an illustrative view showing a searchable range where other communication devices can be found by searching. Referring to FIG. 2, the searchable range is from a person H (user) holding mobile phone 10 to an outer circumference circle OS indicated by a radius of a predetermined distance (for example, 50 m). In the detectable area, there is a person who possesses the first communication device with the device name “AAA”, the second communication device with the device name “BBB”, and the third communication device with the device name “CCC”. If so, the search result is recorded in the communication table shown in FIG.

  Referring to FIG. 3, the communication table includes columns of device name, MAC (Media Access Control) address, and received radio wave level. In the device name column, device names of “AAA”, “BBB”, and “CCC” are recorded. The MAC address column records the MAC address “00: 0 □: 00: 00: AA” corresponding to the device name “AAA”. Further, “−90 dBm” indicating the communication state between the mobile phone 10 and the communication device is recorded in the column of the received radio wave level.

  Similarly, in correspondence with the device name “BBB”, the MAC address “00: 0 □: 00: 00: BB” and “−80 dBm” indicating the communication state are recorded. Furthermore, in correspondence with the device name “CCC”, the MAC address “00: 0 □: 00: 00: CC” and “−95 dBm” indicating the communication state are recorded.

  In short-distance wireless communication, a search is performed every predetermined time, so the communication table is updated every predetermined time. And when updating a communication table, it is judged whether it has already been discovered based on the MAC address of a communication apparatus.

  Here, the received radio wave level corresponds to the distance of the mobile phone 10, and the received radio wave level increases (strong) when the distance is short, and the received radio wave level decreases (weak) when the distance is long. Therefore, if the positional relationship between the mobile phone 10 and each communication device is in the state shown in FIG. 2, the received radio wave level (−80 dBm) of the second communication device closest to the mobile phone 10 is the highest. In addition, the reception radio wave level (-90 dBm) of the next first communication device is the next highest, and the reception radio wave level (-95 dBm) of the third communication device farthest is the lowest.

  Therefore, in this embodiment, the approach of a person carrying a communication device or a vehicle equipped with a communication device is detected using the received radio wave level in short-range wireless communication, and the communication device that was approaching is separated. Continue to notify the user until it continues. Then, the processor 26 can determine whether the communication device approaches or leaves based on the time change of the received radio wave level acquired by the short-range radio additional circuit 44. Therefore, the processor 26 and the short-range wireless communication circuit 44 are sometimes collectively referred to as a determination unit.

  First, in the present embodiment, when an earphone plug is connected to the earphone jack 24, an approach notification process is executed in order to notify the approach of a person or a vehicle approaching the user (human H). When the approach notification process is executed, a communication device is searched every predetermined time (for example, 5 seconds or 2 seconds). Then, based on the received radio wave level of the discovered communication device, the movement of surrounding communication devices is determined. In this embodiment, the area between the outer circle OS and the inner circle IS is set as a detection area DA, and the movement of the communication device is determined within the detection area DA.

  4A to 4D, when a communication device having a received radio wave level of “−100 dBm” is found at a certain time, and the received radio wave level increases by “3 dBm” every predetermined time. It is determined that the communication device is approaching. If the received radio wave level changes as described above, it is determined that the first alert state has occurred, the volume of the sound (first sound) reproduced by the music player function is lowered, and the sound is collected by the microphone 18. Ambient sound (second sound) is output from the earphone at a volume lower than the sound.

  Next, referring to FIGS. 5A to 5D, the received radio wave level of the discovered communication device increases by “5 dBm” every predetermined time. In this case, since the amount of change in the received radio wave level per predetermined time is larger than when it is determined to be the first alert state, a person or the like who possesses the communication device is approaching earlier than in the first alert state. Conceivable. Therefore, in this embodiment, the second alert state is determined, the volume of the sound reproduced by the music player function is lowered, and the ambient sound is output from the earphone at a volume higher than the sound.

  Thus, since the person with the communication device approaches the user earlier than the first alert state in the second alert state, the second alert state is considered to be more dangerous than the first alert state. . Therefore, in order to make it easier for the user to notice the surrounding state, the sound around the user (ambient sound) is output as the main sound whose volume is larger than that of the sub sound. That is, in the first alert state and the second alert state, the user can easily notice the surrounding state by lowering the sound volume and outputting the surrounding sound.

  Further, in this embodiment, when the amount of change in the received radio wave level is “1 dBm” or more and less than “5 dBm”, the first alert state is determined. Furthermore, when the amount of change in the received radio wave level is “5 dBm” or more, the second alert state is determined.

  Then, the notification of the first alert state and the second alert state is stopped when the communication device moves away from the user, that is, when the received radio wave level becomes weak. In other words, if there are no humans or cars approaching the user, unnecessary notifications can be prevented.

  As can be seen from the above explanation, since the approach of a person with a communication device or a vehicle equipped with a communication device is detected with high accuracy, the approach of a person carrying a communication device or a vehicle equipped with a communication device is prevented. Appropriate notifications can be made.

  Further, in the first embodiment, since an approach notification process is executed when an earphone plug is inserted, when a user is difficult to notice the surrounding state by using the earphone, a person who possesses a communication device or the like An approach can be notified. In particular, when the user is listening to music by the music player function that is frequently used, the above-described effects are exerted strongly.

  Furthermore, when the earphone plug is pulled out from the earphone jack 24, the approach notification process is terminated. That is, if the user does not use the earphone, the user can confirm the surrounding state with his / her ear. Therefore, when the earphone plug is pulled out, it is possible to prevent searching for communication devices so as not to consume extra power.

  When the movement of the user (mobile phone 10) is detected by the acceleration sensor 38, the above-described predetermined time is set short in order to increase the frequency of searching for communication devices. That is, when the user is moving, the approach of a person or the like who possesses the communication device can be determined earlier.

  Further, when the user moves and approaches the radio wave repeater 48, the received radio wave level in the short-range wireless communication with the radio wave repeater 48 becomes strong, and a warning state is erroneously notified. Therefore, in the present embodiment, the installation position of the radio wave repeater 48 and the radio wave repeater data including the MAC address are stored in the RAM 36 in advance. If a communication device is found when the user is moving, it is determined whether the communication device is the radio wave repeater 48 based on the MAC address. At this time, if it is determined that the radio wave repeater 48, the information of the radio wave repeater 48 is deleted from the communication table, thereby preventing a warning state from being erroneously notified. However, in another embodiment, the installation position may be included in the radio wave repeater data. In this case, when the processor 26 finds a communication device during movement, the processor 26 determines whether the found communication device is a radio wave repeater by using the GPS circuit 40 to determine the current position.

  In another embodiment, when it can be determined that the earphone plug of the stereo earphone is connected to the earphone jack 24, the ambient sound is output from one earphone (for example, the right side) in the first alert state, and the second alert In the state, ambient sounds may be output from the left and right earphones. If ambient sound cannot be collected by the microphone 18, an alarm sound may be output instead of the ambient sound.

  In another embodiment, the sound reproduced by the music player function and the ambient sound may be output as main sound or sub sound. For example, in the first alert state, the sound is set as the main sound and the ambient sound is set as the sub sound. Further, in the second alert state, the voice is set as the secondary voice and the ambient sound is set as the main voice.

  The ambient sound is collected by the microphone 18, converted to a digital signal by the A / D converter 16, and then input to the processor 26. The processor 26 outputs the digital signal to the second D / A converter 20b without storing it in the RAM 36. Then, after being converted into an analog signal by the second D / A converter 20b, it is output to the earphone via the earphone jack 24.

  When the sound reproduced by the music player and the ambient sound are output simultaneously from the earphone, the processor 26 generates a synthesized sound of the sound and the ambient sound, and then the synthesized sound is sent to the second D / A converter 20b. Output. Further, the processor 26 can generate a synthesized sound having a volume difference between the sound and the ambient sound by adjusting a ratio of synthesizing the sound and the ambient sound. For example, when generating a synthesized sound in which the volume of the sound is larger than the volume of the ambient sound, the synthesis ratio is adjusted so that more speech is synthesized than the ambient sound.

  FIG. 6 is a diagram showing a memory map of the RAM 36. The RAM 36 includes a program storage area 302 and a data storage area 304. Further, a part of the program and data is read from the flash memory 32 all at once or partially and sequentially as necessary and stored in the RAM 36.

  The program storage area 302 stores a program for operating the mobile phone 10. For example, programs for operating the mobile phone 10 include an approach notification program 310 and a standby program 312. The approach notification program 310 is a program for notifying the approach of a person or the like who has a communication device based on the received radio wave level of short-range wireless communication. The standby program 312 is a subroutine of the approach notification program 310, and is a program for setting a cycle (predetermined time) for searching for communication devices.

  Although illustration is omitted, the program for operating the mobile phone 10 includes a program for executing a music player function.

  Subsequently, in the data storage area 304, an acceleration buffer 330, a position buffer 332, a previous buffer 334, and a volume buffer 336 are provided, and radio wave repeater data 338 and communication table data 340 are stored. Further, the data storage area 304 is provided with an earphone flag 342, an audio output flag 344, a first search counter 346 and a second search counter 348.

  The acceleration buffer 330 temporarily stores acceleration data output from the acceleration sensor 38. The position buffer 332 temporarily stores current position data measured using the GPS circuit 40 or the like. In the previous buffer 334, communication table data 340 is temporarily stored. The movement of the communication device is determined based on the received radio wave level of the communication table stored in the previous buffer 334 and the received radio wave level of the communication table updated by the search. The volume buffer 336 stores data indicating the volume value of the sound output from the earphone. Then, when the warning state notification is stopped, the processor 26 restores the lowered sound volume based on the data stored in the sound volume buffer 336.

  The radio repeater data 338 is data including an installation position of the radio repeater 46 installed in a public place, a MAC address, and the like. The communication table data 340 is table data having a configuration shown in FIG. 3, for example.

  The earphone flag 342 is a flag for determining whether or not an earphone plug is inserted into the earphone jack 24. For example, the earphone flag 342 includes a 1-bit register. When the earphone flag 342 is turned on (established), a data value “1” is set in the register. On the other hand, when the earphone flag 342 is turned off (not established), a data value “0” is set in the register. In this embodiment, the approach notification process is executed when the earphone flag 342 is turned on, and the approach notification process is ended when the earphone flag 342 is turned off.

  The sound output flag 344 is a flag for determining whether sound is output by a music player function or the like. The first search counter 346 is a counter for measuring a first predetermined time (for example, 5 seconds), and starts counting (measurement) when reset (initialized). Therefore, the first search counter 346 is called a first search timer. The second search counter 348 is a counter for measuring a second predetermined time (for example, 2 seconds). Also, like the first search counter, it is called a second search timer.

  Although illustration is omitted, the data storage area 304 stores image data displayed on the display 32 in a standby state, character string data, and the like, as well as counters and flags necessary for the operation of the mobile phone 10. Is also provided.

  The processor 26 is under the control of a Linux (registered trademark) -based OS such as Android (registered trademark) and REX, and other OSs, and the waiting notification process shown in FIG. 10 and the approach notification process shown in FIGS. Process multiple tasks in parallel, including processing.

  FIG. 7 is a flowchart illustrating a part of the approach notification process according to the first embodiment. For example, when an earphone plug is inserted into the earphone jack 24 and the earphone flag 342 is turned on, the processor 26 activates the short-range wireless communication circuit 44 in step S1. That is, it is possible to establish near field communication or search for a communication device. Note that if the short-range wireless communication circuit 44 has already been activated, the process of step S1 may be omitted.

  Subsequently, in step S21 of FIG. 8, a communication device is searched. That is, the communication device existing in the detection area DA shown in FIG. 2 is searched. Subsequently, in step S23, it is determined whether or not it has been found. That is, it is determined whether a communication device exists in the detection area DA. If “NO” in the step S23, that is, if there is no communication device in the detection area DA, a standby process is executed in a step S45, and the process returns to the step S21. Since this standby process will be described in detail with reference to the flowchart of FIG. 10, the description thereof is omitted here.

  On the other hand, if “YES” in the step S23, that is, for example, if three communication devices can be found in the detection area DA as shown in FIG. 2, the information on the communication device found in the step S25 is recorded. For example, as shown in FIG. 3, the device names and MAC addresses of three communication devices are recorded in the communication table data.

  Subsequently, in step S27, it is determined whether or not the information of the radio wave repeater 48 is recorded. For example, it is determined whether the MAC address of the communication device recorded in the communication table data 340 is registered in the radio wave repeater data 338. If “NO” in the step S27, for example, if the MAC address of the radio wave repeater 48 is not recorded in the communication table, the process proceeds to a step S31. On the other hand, if “YES” in the step S27, for example, if the MAC address of the radio repeater is recorded in the communication table, the information of the radio repeater 48 is deleted in a step S29, and the process proceeds to the step S31.

  Subsequently, in step S31, the received radio wave level is acquired. That is, the received radio wave level of each communication device recorded in the communication table is acquired and recorded in the communication table data 340. As a specific process, the short-range wireless communication circuit 44 can detect the strength of a signal transmitted from each communication device. Then, the processor 26 acquires the signal strength of each communication device detected by the short-range wireless communication circuit 44 as “dBm”. If the previous state communication table data 340 is not recorded in the previous buffer 334, the communication table data 340 is copied to the previous buffer 334 after the process of step S31 ends.

  Subsequently, in step S33, it is determined whether the received radio wave level has changed. That is, it is determined whether there is a communication device whose received radio wave level has changed due to movement. Specifically, the reception radio wave level of the communication table data recorded in the previous buffer 344 and the reception radio wave level of the communication table data 340 are compared based on the MAC address. Regardless of the determination result of “YES” or “NO” in step S33, when the determination in step S33 ends, the communication table data 340 is copied to the previous buffer 344.

  If “NO” in the step S33, that is, if there is no communication device whose received radio wave level has changed, the process proceeds to a step S45. If “YES” in the step S33, that is, if there is a communication device whose received radio wave level has changed, it is determined whether or not the change amount is equal to or less than a threshold value in a step S35. In other words, since the received radio wave level also fluctuates due to changes in the surrounding environment, it is determined whether the amount of change is equal to or less than a threshold value (for example, 0.9 dBm) in order to accurately determine whether the communication device is moving. If “YES” in the step S35, for example, if the change amount is “0.5 dBm”, the process proceeds to a step S45. On the other hand, if “NO” in the step S35, for example, if the change amount is “3 dBm”, it is determined whether or not the received radio wave level is increased in a step S37. That is, it is determined whether the communication device is approaching. Specifically, it is determined whether the received radio wave level of communication table data 340 is higher than the received radio wave level of communication table data recorded in buffer 344 last time.

  If “NO” in the step S37, for example, if the received radio wave level is weak, the process proceeds to a step S45. On the other hand, if “YES” in the step S37, that is, if the received radio wave level is strong, it is determined whether or not the first alert state is in a step S39. That is, it is determined whether the amount of change in the received radio wave level is “1 dBm” or more and less than “5 dBm”. If “YES” in the step S39, for example, the received radio wave level is changed from “−100 dBm” to “−97 dBm”, and if the change amount is “3 dBm”, the first warning state is notified in a step S41. Then, the process proceeds to step S61. For example, in step S41, the volume of the sound reproduced by the music player function is lowered and outputted from the earphone, and the surrounding sound is made smaller than the sound and outputted from the earphone. If “NO” in the step S39, as shown in FIG. 5, for example, if the amount of change in the received radio wave level is “5 dBm” or more, the second warning state is notified in a step S43, and the process proceeds to the step S61. . For example, in step S43, the sound volume is lowered and outputted from the earphone, and the surrounding sound is made louder than the sound and outputted from the earphone.

  The processor 26 that executes the process of step S39 functions as an approach determination unit. Further, the processor 26 that executes the processes of steps S41 and S43 functions as a notification unit.

  Referring to FIG. 9, in step S61, a communication device is searched. That is, the communication device that is approaching or another communication device that is approaching newly is searched. In step S63, it is determined whether or not it has been found. That is, it is determined whether a communication device approaching or another communication device approaching newly has been found. If “NO” in the step S63, for example, if the approaching communication device is lost, the process proceeds to a step S79.

  If “YES” in the step S63, that is, if the communication device can be discovered again, the information on the discovered communication device is recorded in a step S65 as in the step S25. Subsequently, at step 67, it is determined whether the information of the radio wave repeater 48 is recorded in the communication table. If “NO” in the step S67, that is, if the information of the radio wave repeater 48 is not recorded in the communication table, the process proceeds to a step S71. On the other hand, if “YES” in the step S67, that is, if the information of the radio repeater 48 is recorded in the communication table, the information of the radio repeater 48 is deleted from the communication table in a step S69, and the process proceeds to the step S71. .

  Subsequently, in step S71, the received radio wave level is acquired as in step S31. Subsequently, in step S73, it is determined whether the received radio wave level has changed. If “NO” in the step S73, the standby process is executed in a step S81 similarly to the step S45. If “YES” in the step S73, that is, if the received radio wave level has changed, it is determined whether or not the change amount is equal to or less than a threshold value in a step S75. If “YES” in the step S75, that is, if the change amount is equal to or less than the threshold value, the process proceeds to a step S81.

  If “NO” in the step S75, that is, if the change amount is larger than the threshold value, it is determined whether or not the received radio wave level is weak in a step S77. That is, it is determined whether the communication device that has been approaching moves away from the mobile phone 10. If “NO” in the step S77, for example, if the approaching communication device is further approaching, the process proceeds to the step S81. On the other hand, if “YES” in the step S77, that is, if the approaching communication device moves away from the mobile phone 10, the alerting state notification is stopped in a step S79. For example, the ambient sound is prevented from being output from the earphone, and the sound volume output from the earphone is returned to the state before being notified based on the sound volume value stored in the sound volume buffer 336.

  Then, when the process of step S79 ends, the process returns to step S21. That is, the approach of a person or the like who has a communication device is monitored again.

  The processor 26 that executes the processes of steps S21 and S61 functions as a search unit. Further, the processor 26 that executes the processes of steps S31 and S71 functions as an acquisition unit. Furthermore, the processor 26 that executes the process of step S77 functions as a separation determination unit. And the processor 26 which performs the process of step S79 functions as a stop part.

  FIG. 10 is a flowchart of standby processing. For example, when step S45 or step S81 of the approach notification process is executed, the processor 26 determines whether or not the output of the acceleration sensor has changed in step S101. That is, it is determined whether the mobile phone 10 has changed from a moving state or a stopped state. Specifically, it is determined whether or not the virtuality data stored in the acceleration buffer 330 has changed. If “NO” in the step S101, that is, if the state of the mobile phone 10 has not changed, the process proceeds to a step S109.

  If “YES” in the step S101, that is, if the state of the mobile phone 10 changes, it is determined whether or not it is in a stopped state in a step S103. That is, it is determined whether the state of the mobile phone 10 has changed to the stopped state. If “YES” in the step S103, that is, if the mobile phone 10 is changed to a stopped state, the first search timer is set in a step S105. That is, the first search timer is set so that the period for searching for communication devices is a first predetermined time (for example, 5 seconds). On the other hand, if “NO” in the step S103, that is, if the mobile phone 10 changes from the stopped state to the moving state, the second search timer is set in a step S107. That is, the second search timer is set so that the period for searching for communication devices is a second predetermined time (for example, 2 seconds) that is shorter than the first predetermined time. The processor 26 that executes the process of step S107 functions as a time setting unit.

  Subsequently, in step S109, the set timer is reset. For example, if the first search timer is set, the first search counter 346 is reset. Subsequently, in step S111, it is determined whether or not the timer has expired. For example, when the first search timer is set, it is determined whether the measurement of the first predetermined time has ended. If “NO” in the step S111, for example, if the first search timer has not expired, the determination in the step S111 is repeated. If “YES” in the step S111, for example, if the first search timer expires, the standby process is ended and the process returns to the approach notification process.

<Second embodiment>
In the second embodiment, a communication device is searched when sound is output by a music player function or the like. In other words, power consumption can be suppressed by not searching for a communication device if the earphone is not listening to voice. Since the mobile phone 10 of the second embodiment is substantially the same as the first embodiment, description of the electrical configuration of the mobile phone 10 and the memory map of the RAM 36 is omitted.

  The processor 26 of the second embodiment includes a plurality of access notification processes of the second embodiment shown in FIGS. 11, 12, and 13 under the control of a Linux-based OS such as Android and REX, and other OSs. Process tasks in parallel.

  FIG. 11 is a partial flowchart of the approach notification process according to the second embodiment. In this flowchart, the same step number is assigned to the same step as the approach notification process shown in FIGS. 7 to 9, and the detailed description is omitted.

  For example, when an earphone plug is inserted into the earphone jack 24, the processor 26 determines whether or not sound is output in step S131. For example, it is determined whether or not music data is reproduced by the music player function and the audio output flag 344 is turned on. If “NO” in the step S131, for example, if music data is not reproduced, the process of the step S131 is repeatedly executed. If “YES” in the step S131, for example, when music data is reproduced, the short-range wireless communication circuit 44 is activated in a step S1.

  Subsequently, the processing of steps S21 to S45 in FIG. 12 is executed. When the process of step S45 is completed, the process proceeds to step S133. In step S133, it is determined whether or not the audio output is stopped. For example, it is determined whether reproduction of music data is stopped by the music player function and the audio output flag 344 is turned off. If “NO” in the step S133, for example, if reproduction of music data is continued, the process returns to the step S21. On the other hand, if “YES” in the step S133, for example, if the reproduction of the music data is stopped, the process returns to the step S131.

  Next, the process of step S61-S81 is performed. When the process of step S81 ends, the process proceeds to step S135. In step S135, as in step S133, it is determined whether the audio output has been stopped. If “NO” in the step S135, for example, if a sound is output, the process returns to the step S61. On the other hand, if “YES” in the step S135, that is, if the sound output is stopped, the warning state notification is stopped in a step S137, and the process returns to the step S131.

<Third embodiment>
In the third embodiment, the first alert state or the second alert state is determined based on the distance from the other communication device. Specifically, the closer the user is to the user, the stronger the user is notified. Since the mobile phone 10 of the third embodiment is substantially the same as the first embodiment, description of the electrical configuration of the mobile phone 10 and the memory map of the RAM 36 is omitted.

  Referring to FIG. 14A, when a communication device with a received radio wave level of “−100 dBm” is found at a certain time, it is determined that the user is away from the other communication device, so that the non-warning state is determined. Is done. In this case, the risk is low and the user is not notified.

  Next, referring to FIGS. 14B and 14C, when the communication device of the other party approaches the user and the received radio wave level becomes “−95 dmb” or “−90 dmb”, the communication between the user and the other party is performed. Since the device is approaching, it is determined as the first alert state.

  Then, referring to FIG. 14D, if the partner communication device is closer to the user and the received radio wave level is “−85 dBm”, the user and the partner communication device are quite close to each other. The second alert state is determined.

  As described above, in the third embodiment, when it can be determined that the reception radio wave level of the partner communication device is approaching, the content to be notified can be changed based on the distance to the partner. In the third embodiment, the volume reduction range may be changed according to the received radio wave level, that is, the distance between the communication device and the mobile phone 10. That is, if the distance is long, the volume decrease is reduced, and if the distance is close, the volume decrease is increased.

  Also in the third embodiment, the alert state notification can be stopped when the other communication device is separated.

  Further, in the third example, when the received radio wave level is “−100 dBm” or less, it is determined as the non-warning state. Further, when the received radio wave level is greater than “−100 dBm” and equal to or less than “−90 dBm”, the first alert state is determined. Further, when the received radio wave level is higher than “−90 dBm”, it is determined as the second alert state.

  It should be noted that the first to third embodiments can be arbitrarily combined, and a specific combination can be easily imagined, and thus detailed description thereof is omitted.

  Further, when it is determined that two or more communication devices are approaching at the same time, a warning state corresponding to the communication device having the shortest distance is notified to the user.

  The communication device of this embodiment includes a mobile phone, a so-called smart phone, a notebook PC having a wireless communication function, a headset using wireless communication, a mobile router, a navigation system having a wireless communication function, an ETC on-vehicle device, and the like. included.

  In another embodiment, the approach notification process may be executed when the power of the mobile phone 10 is turned on. In this case, the first alert state or the second alert state may be notified not by sound but by the vibration intensity of the vibrator, the brightness of the LED light, or the like.

  In another embodiment, the short-range wireless communication scheme may be a Bluetooth (registered trademark) scheme based on IEEE 802.15.1, or a “WiMAX (registered trademark)” or “ "Mobile WiMAX" system may be used. Further, the short-range wireless communication method may be an ETC method.

  In still other embodiments, the alert state is not limited to two states, and more alert states may be set. For example, if the time variation of the received radio wave level is greater than or equal to a predetermined value, it is considered that a communication device mounted in a car or the like is approaching, so the third alert that notifies the user of a sudden approach of the communication device. A state may be set. When the third alert state is set, the sound being played is muted. When the sound is muted, the user can notice a sudden approach of the communication device and can easily recognize the surrounding situation. Thus, the user can quickly cope with a sudden approach.

  In addition, when it is possible to identify the communication with the ETC system or the navigation system, it is possible to determine that the approaching object is a vehicle that may approach suddenly, so the third alert state is set. May be.

  In addition to the music player function, the approach notification process may be executed even when an earphone is used for the TV viewing function or an earphone microphone (headset) is used during a voice call.

  Further, the mobile phone 10 of this embodiment also has a communication function for establishing communication with the network. Then, the mobile phone 10 can acquire the distribution music data distributed from the data server and reproduce it by the music player function.

  In another embodiment, the earphone may be connected to the mobile phone 10 by Bluetooth short-range wireless communication.

  The communication system of the mobile phone 10 is a CDMA system, but an LTE (Long Term Evolution) system, a W-CDMA system, a GSM system, a TDMA system, an FDMA system, a PHS system, and the like may be employed.

  Further, the plurality of programs used in this embodiment may be stored in the HDD of the data distribution server and distributed to the mobile phone 10 via the network. Further, the storage medium may be sold or distributed in a state where a plurality of programs are stored in a storage medium such as an optical disk such as a CD, DVD, or BD (Blu-ray Disc), a USB memory, or a memory card. When a plurality of programs downloaded through the above-described server or storage medium are installed in a mobile phone having the same configuration as that of this embodiment, the same effect as that of this embodiment can be obtained.

  Further, the present embodiment is not limited to the mobile phone 10 but may be applied to so-called smartphones, tablet PCs, and PDAs (Personal Digital Assistants).

  The specific values such as the predetermined distance, received radio wave level, threshold value, first predetermined time, and second predetermined time given in this specification are merely examples, and are subject to changes in product specifications, etc. Can be changed as appropriate.

DESCRIPTION OF SYMBOLS 10 ... Mobile phone 12 ... Antenna 14 ... Wireless communication circuit 24 ... Earphone jack 26 ... Processor 28 ... Key input device 32 ... Display 36 ... RAM
DESCRIPTION OF SYMBOLS 38 ... Acceleration sensor 40 ... GPS circuit 42 ... GPS antenna 44 ... Short-range wireless communication circuit 46 ... Short-range wireless communication antenna 48 ... Wireless repeater 100 ... GPS satellite

Claims (12)

A portable communication terminal that, when an earphone is connected, uses a sub voice that can be output during the output of the main voice and the main voice and that is smaller in volume than the main voice to notify approach to another communication device. Because
A sound output function for outputting the first sound output as the main sound or the sub sound;
A microphone for inputting ambient sound as the second sound output as the main sound or the sub sound;
Acquisition unit for acquiring a radio wave level in a wireless communication with the communication device, and
Based on the way when the change of the radio wave level, by setting one of the first audio and the second audio as the main voice, sets the other of the first audio and the second audio as the secondary audio A portable communication terminal comprising a notification unit for notifying of approach. Based on the way when the change of the received radio wave level obtained by the pre-Symbol acquiring unit sets the first voice as the main voice, by releasing the setting for the second audio, stop the notification by the notification unit The mobile communication terminal according to claim 1, further comprising a stop unit that performs the operation. Further comprising a search unit for searching for a communication device capable of establishing a short-range wireless communication to each Jo Tokoro time, according to claim 1 or 2 mobile communication terminal according. An acceleration sensor for detecting the movement of the mobile communication terminal, and when said movement of the mobile communication terminal by the acceleration sensor is detected, further comprising a time setting unit for setting shorter the predetermined time, the mobile communication according to claim 3, wherein Terminal. The search unit, when the earphone to the mobile communication terminal is connected, searching for a communication device capable of establishing a short-range wireless communications, according to claim 3 or 4 SL placing the mobile communication terminal. The search unit, when the connection of the mobile communication terminal and the earphone is released, stop can establish search communication device near field communication, mobile communication terminal according to any one of claims 3 to 5 . Before SL searching unit, the state where the portable communication terminal earphone is connected, when said first sound is output, searching for a communication device capable of establishing a short-range wireless communication, the claims 3 to 6 The mobile communication terminal according to any one of the above. A storage unit for storing music data;
The audio output function includes a music player function for reproducing music data,
The mobile communication terminal according to claim 1, wherein the first sound includes a sound of the music data reproduced by the music player function. The mobile communication terminal has a communication function for establishing communication with a network,
The portable music terminal according to claim 8 , wherein the music data includes distributed music data distributed via a network by the communication function. A determination unit for determining a first warning state and a second warning state having a higher degree of danger than the first warning state based on a change in the radio wave level over time;
The notification unit sets the first voice as the main voice and sets the second voice as the sub-voice when the judgment unit judges that the first warning state is detected, and the judgment unit sets the second voice. 2. The mobile communication terminal according to claim 1, wherein, when it is determined that two alert states are set, the second voice is set as the main voice, and the first voice is set as the sub voice, thereby notifying an approach. When the earphone is connected, the main audio and the sub audio that can be output during the output of the main audio and that has a lower volume than the main audio are used to notify the approach to another communication device, and the main audio Alternatively, a sound output function for outputting the first sound output as the sub sound, a microphone for inputting an ambient sound as the second sound output as the main sound or the sub sound, and radio waves in wireless communication with the communication device A processor of a mobile communication terminal having an acquisition unit for acquiring a level;
By setting one of the first sound and the second sound as the main sound and setting the other of the first sound and the second sound as the sub sound based on the change over time of the radio wave level, An approach notification program that functions as a notification unit that notifies approach. When the earphone is connected, the main audio and the sub audio that can be output during the output of the main audio and that has a lower volume than the main audio are used to notify the approach to another communication device, and the main audio Alternatively, a sound output function for outputting the first sound output as the sub sound, a microphone for inputting an ambient sound as the second sound output as the main sound or the sub sound, and radio waves in wireless communication with the communication device An approach notification method in a mobile communication terminal having an acquisition unit for acquiring a level, wherein the processor of the mobile communication terminal
By setting one of the first sound and the second sound as the main sound and setting the other of the first sound and the second sound as the sub sound based on the change over time of the radio wave level, An approach notification method for executing a notification step for notifying of approach.

Images