JP4702997B2 - Mobile communication terminal device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a display function of a mobile communication terminal apparatus when performing data communication with a base station.
[0002]
[Prior art]
Conventional mobile radio terminal devices of this type are configured to display only the received electric field level: RSSI level using an antenna bar and notify the terminal device user of the communication environment. According to this conventional apparatus, even if the RSSI level is displayed, the user cannot determine which level is an environment suitable for data communication. Some users perform data communication even in an environment where communication quality is low.
[0003]
If data communication is performed in an environment unsuitable for data communication, an error may occur in received data during the communication. When a reception error occurs, data retransmission is requested from the reception side to the transmission side, and data retransmission processing is performed from the transmission side in response to this request. As a result, the time required for transmission increases, resulting in a decrease in total transmission speed. It causes a defect. Further, when the received data error exceeds the range that can be corrected, there is a problem that even the synchronization cannot be maintained and the data communication needs to be performed again.
[0004]
In addition, when data communication is performed in a TDMA system, depending on the line traffic, there are cases where the number of available empty slots becomes smaller than the number of slots normally used. For example, when the number of slots normally used is two and only one slot can be prepared in the base station, data communication in one slot may be started before the user is aware of it.
[0005]
In this way, if the number of slots is less than the number of slots that are normally used without the user's awareness, as a result, the communication speed decreases, communication takes time, and communication costs increase. It was happening.
[0006]
[Problems to be solved by the invention]
As described above, in the conventional terminal device, since the reception electric field level is displayed by the antenna bar, the communication environment is simply notified to the user of the terminal device. Therefore, when the user performs data communication, the data communication is performed. Because there is no means for the user to know whether the communication environment is suitable for communication, data communication is performed without being aware of the communication environment. As a result, there has been a problem that after starting data communication, the communication time is longer than the data communication time when the communication environment is good, or the communication is forced to be repeated during the communication.
[0007]
Therefore, the present invention eliminates this problem and provides a mobile communication terminal device that enables a user to be aware of whether or not the communication environment is suitable for performing data communication. With the goal.
[0008]
[Means for Solving the Problems]
The present invention relates to a control transmitted from a base station in a mobile communication terminal device that is connected to the base station via a wireless line and communicates with the base station at a communication speed that is increased in proportion to the number of slots. Detecting means for receiving a signal and detecting the number of empty slots of the base station included in the received control signal , and a threshold of the number of slots serving as a criterion for determining whether or not the communication speed is equal to or higher than a predetermined speed; Storage means for storing a value, and control means for displaying on the display section that the display unit is inappropriate for data communication when the detected number of empty slots is smaller than the threshold value of the stored slot number To achieve the above object.
In addition, in a mobile communication terminal device that is connected to the base station via a wireless line and communicates with the base station at a communication speed that is low in proportion to the fluctuation range of the received electric field strength, and transmitted from the base station. Detecting means for receiving the control signal and detecting the received electric field strength of the received control signal; and detecting the electric field strength of a plurality of control signals received within a predetermined time, and changing the range of the received electric field strength. Identifying means for identifying the received electric field strength, storage means for storing a threshold value of the fluctuation range of the received electric field strength as a criterion for determining whether or not the communication speed is equal to or higher than a predetermined speed, and the detected received electric field strength When the fluctuation range is larger than the threshold value of the stored fluctuation range of the received electric field strength, the control unit performs a display on the display unit to indicate that it is inappropriate for data communication. Achieve.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a configuration diagram of a mobile communication terminal apparatus according to an embodiment of the present invention.
[0010]
The terminal includes a radio unit 1, a modulation unit 2, a TDMA unit 3, an encoding unit 4, a control unit 5, a storage unit 6, and a power supply unit 7.
[0011]
The downlink reception signal from the base station is received by the antenna 11, is input to the reception unit 13 through the switch 12, and the local signal from the synthesizer 14 is supplied to be frequency-converted. The intensity of the received signal is detected by the RSSI detector 16 and supplied to the controller 5. The frequency-converted received signal is demodulated by the digital demodulation circuit 21. The demodulated signal is converted from a burst signal to a continuous signal by the TDMA decoder 31. The continuous signal is decoded by ADPCM-CODEC 41 and converted into a PCM signal. The PCM signal is further decoded by the PCM-CODEC 42 to become an analog signal, which is output from the speaker 43.
[0012]
On the other hand, an analog signal input from the microphone 43 is converted into a PCM signal by the PCM-CODEC 42 and then encoded by the ADPCM-CODEC 41. The ADPCM encoded signal is converted into a burst signal by the TDMA encoder 32. The burst signal is modulated by the digital signal modulation circuit 22. The modulated signal is converted into a high-frequency signal by a local signal from the synthesizer 14 in the transmitter 15, amplified, and then transmitted through the switch 12 and the antenna 11.
[0013]
The power supply unit 7 includes a battery 71 and a power supply circuit 72 for converting the voltage of the battery output, and supplies the converted power to each unit.
[0014]
The control unit 5 includes a communication quality monitoring unit 55 and a communication quality comparison unit 56. An operation unit 51, LCD 52, LCD control unit 53, sounder 54, and vibrator 59 are connected to the control unit 5. The storage unit 6 includes a download data storage unit 61 and a display data storage unit 62.
[0015]
A feature of the present embodiment is that, before entering data communication, it is estimated whether or not the mobile communication terminal apparatus is in an environment suitable for data communication, and the estimation result is notified. An example of this control is shown in FIG.
[0016]
In FIG. 2, after the power is turned on, a position registration process is performed and a standby reception state is entered (steps 301, 302, and 303). In the location registration process, synchronization is established with one base station, a control signal is periodically transmitted from the base station, and the mobile communication terminal apparatus receives this control signal and sets the RSSI level of the received signal. The detected level is temporarily stored in the storage unit (step 304).
[0017]
When the data communication mode by the operator is input and set, the detected RSSI level is compared with a threshold value (steps 304, 305, and 306). The threshold value of the RSSI level is an experience value for normally performing data communication. This value is larger than the RSSI level that is a condition for handover determination.
[0018]
When recognizing that the detected RSSI level is equal to or lower than the threshold value, it is determined that the RSSI level is inappropriate for data communication, and a message that “the environment is inappropriate for data communication” is displayed on the LCD (steps 308 and 309). ).
[0019]
On the other hand, if it is recognized that the RSSI is larger than the threshold value, it is determined that the environment is suitable for data communication, and “the environment is suitable for data communication” is displayed on the LCD (steps 310 and 311).
[0020]
After displaying information on whether or not it is suitable for data communication on the LCD, the control unit waits for a call operation for data communication from the user (step 312). When a call operation is detected, data communication is started (313).
[0021]
In this way, by providing a function to notify the user whether or not the mobile communication terminal device is in a communication environment suitable for data communication before performing data communication, data communication is started by starting data communication in a poor communication environment. There is no need for operations such as communication taking a long time or data communication being cut off in the middle of data communication and re-communication.
[0022]
(Second Embodiment)
The operations up to the start of standby reception in steps 401, 402, and 403 are the same as those in the first embodiment. Thereafter, empty slot information included in the control signal transmitted from the synchronized base station is acquired (step 404).
[0023]
When the data communication mode is set, the obtained number of empty slots is compared with a threshold value (steps 405 and 406). If it is determined that the number of empty slots is 1 or less, it is determined that the environment is inappropriate for data communication, and the message “Inappropriate environment for data communication” is displayed on the LCD (steps 408 and 409). Usually, in PHS data communication, two slots are used, so performing data communication in one slot doubles the communication time and is inappropriate for data communication.
[0024]
If there is only one empty slot, a message that “communication time is long” may be displayed.
[0025]
On the other hand, when recognizing that the number of empty slots is 2 or more, the LCD displays “suitable for data communication” (steps 410 and 411).
[0026]
When a call operation from the user is detected after being displayed on the LCD, data communication is started (steps 412 and 413).
[0027]
(Third embodiment)
The process until the standby (steps 501, 502, 503) is the same as in the first and second embodiments. A control signal is received at regular intervals transmitted from the synchronized base station in the standby state (step 504). Then, when a request for setting the data communication mode is received from the terminal device user (step 505), the RSSI level within a predetermined time until that point is checked, the fluctuation range is specified, and a predetermined threshold value is determined. (Step 506).
[0028]
When it is determined that the RSSI fluctuation range is larger than a predetermined threshold value, it is determined that the RSSI is not suitable for data communication, and a display indicating that “the environment is inappropriate for data communication” is displayed on the LCD (step 508). 509). If it is determined that the RSSI fluctuation range is within the threshold value, it is determined that the RSSI fluctuation range is appropriate for the data communication, and a message “appropriate for data communication” is displayed on the LCD (step 511). The processing after the display on the LCD is the same as in the first and second embodiments.
[0029]
In all the above-described embodiments, an example in which the display indicating whether or not it is suitable for data communication is performed after a user who has tried to perform data communication inputs a request for communication is shown. However, the present invention is not limited to this. Instead, in the standby state, it may be displayed periodically on the LCD or based on other operations.
[0030]
【The invention's effect】
In the present invention, by providing means for notifying the user whether or not the user is in a communication environment suitable for performing data communication when performing data communication, the user is made aware of the data communication environment. It becomes possible. As a result, when starting data communication, the user can determine whether to start data communication based on the information described above, and data communication takes time by starting data communication in a poor communication environment. , The operation of redoing communication becomes unnecessary.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a mobile communication terminal apparatus showing an embodiment of the present invention. FIG. 2 is a flowchart showing the first embodiment in the embodiment of the present invention. FIG. 4 is a flowchart showing a second embodiment in the embodiment. FIG. 4 is a flowchart showing the third embodiment in the embodiment of the present invention.
52 ... LCD
55 ... Communication quality monitoring unit 56 ... Communication quality comparison unit

Claims (3)

In a mobile communication terminal device that is connected to a base station via a wireless line, communicates with the base station at a communication speed that is high in proportion to the number of slots, and includes a display unit.
Detecting means for receiving a control signal transmitted from the base station, and detecting the number of empty slots of the base station included in the received control signal;
Storage means for storing a threshold value of the number of slots serving as a criterion for determining whether or not the communication speed is equal to or higher than a predetermined speed ;
Control means for displaying, on the display unit, an indication that the detected number of empty slots is inappropriate for data communication when the number of detected empty slots is smaller than the threshold value of the stored number of slots. Mobile communication terminal device. The mobile communication terminal apparatus according to claim 1, wherein the indication that the data communication is inappropriate is a indication that a long communication time is required . In a mobile communication terminal device that is connected to a base station via a wireless line, communicates with the base station at a communication speed that is low in proportion to the fluctuation range of the received electric field strength, and includes a display unit.
Detecting means for receiving a control signal transmitted from the base station, and detecting a received electric field strength of the received control signal;
Detecting means for detecting electric field strengths of a plurality of control signals received within a predetermined time, and specifying a fluctuation range of the received electric field strength;
Storage means for storing a threshold value of the fluctuation range of the received electric field strength, which is a criterion for determining whether or not the communication speed is equal to or higher than a predetermined speed;
Control means for displaying, on the display unit, an indication that the received electric field strength is inappropriate for data communication when the detected fluctuation range of the received electric field strength is larger than a threshold value of the stored received electric field strength fluctuation range; A mobile communication terminal device comprising:

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