JPH10224850A - Data communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To appropriately execute data communication even at the same time of moving by execute the transmission control of stored data when existing in a speakable range is detected based on the result of monitoring by a speakable range monitoring part. SOLUTION: A controller 11 detects the set/reset of the flag of a communication data presence/absence storing device 19 through a communication control part 10 to detect whether data to transmit exists. At the time of detecting the presence of data to transmit then, the speakable range monitoring part 18 obtains the signal of an RF transmitting and receiving part 12 through the controller 11 and the part 10. Then at the time of detecting existing within the speakable range, a timer 9 is advanced stepwise and at the time of detecting time up the controller 11 receiving information from the timer 9 gives instruction to the part 10 to control data transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication apparatus for performing data communication with another data communication apparatus via a radio line between base stations each having a communication area of a predetermined size. is there.

[0002]

2. Description of the Related Art Conventionally, a PHS (PeP) system has been used as a system in which a telephone call (communication) is performed via a radio line with a base station having a communication area of a predetermined size.
rsonalHandy-Phone System) is known. An example of this system will be described with reference to FIG. Base station 10
1 (101-1 to 101-4) use radio waves in the 1.9 GHz band, and each can be connected to up to three slave units. Slave units 100-1 to 100-4 are connected to any of base stations 101-
A call can be made even if the user moves to a callable range of 1 to 101-4.

[0003] Base stations 101-1 and 101-2 are connected via a base station connecting device 102-1 to a digital exchange 103-1.
The base stations 101-3 and 101-4 are connected to the digital exchange 10 via a base station connection device 102-2.
3-2. Digital exchange 103-1, 1
No. 03-2 are connected to each other via a relay network 110, and No. 03 via signal relay exchanges 104-1 and 104-2. 7 common line signal network 105 is connected to location registration information management device 106. Further, the digital exchange 103-
1, 103-2 are connected to a charging information management device 108 and a user authentication management device 109 via a packet network 107. The subscriber telephone / ISDN 111 is connected to the relay network 110.
, And the relay network 110 is No. 7 common line signal network 105 is connected to location registration information management device 106.

In the system configured as described above, for example, when a call is made from the slave unit 100-1 to the slave unit 100-4 to make a call, the base station 101-1 and the base station connecting device 102-1 are used. Digital exchange 10 via
When the dial number of the handset 100-4 is sent to 3-1, the digital exchange 103-1 accesses the user authentication management device 109 via the packet network 107 to authenticate the handset 100-1. When the authentication is performed, the digital exchange 103-1 sends N to the signal relay exchange 104-1.
o. 7 to access the location registration information management device 106 via the common channel signaling network 105 to obtain location information, and based on the location information, the digital exchange 103 via the relay network 110.
-2, and further, digital exchange 103-2,
A calling signal is transmitted to the slave unit 100-4 via the base station connecting device 102-2 and the base station 101-4. Slave unit 100-4
Is established, a communication path is formed via the relay network 110, and mutual communication is performed by forming the communication path. On the other hand, billing information is sent from the digital exchange 103-1 to the billing information management device 108 via the packet network 107, and billing is managed.

[0005] The location registration is performed by the slave units 100-1 to 100-10.
0-4 to base stations 101-1 to 101-4, base station connecting devices 102-1 and 102-2, digital exchange 103
-1, 103-2, signal relay exchanges 104-1, 104
-2 and No. 2 (7) The identification information of each of the slave units 100-1 to 100-4 is sent and registered together with the identification information of the base stations 101-1 to 101-4 to the location registration information management device 106 via the common channel signaling network 105. Made by

In the above, the slave units 100-1 to 100-
4 is configured, for example, as shown in FIG. That is, the slave units 100-1 to 100-4 are connected to the mobile phone 200.
To the GPS (Global Posit) via the information adapter 300
ioning System; 250, printer 2
60, a digital camera 270, a scanner 280, and an external storage device 290 are connected.

The portable telephone 200 includes an RF transceiver 21 for transmitting and receiving radio waves to and from a base station via a wireless line.
0, a communication control unit 220 including a modulation / demodulation unit and a TDMA / TDD processing unit, a control device 230 for controlling the whole of the mobile phone 200, an input / display control device 240 for inputting and displaying data, and a data for switching transmission / reception data. A switching device 211, an audio encoding device 212 for encoding and decoding audio, a speaker 214 for outputting audio, and a microphone 213 for inputting audio are provided.

On the other hand, the information adapter 300 has a data communication connection I for transmitting and receiving data via the mobile phone 200.
/ F (interface) 310, a control signal I / F (interface) 320 for transmitting and receiving control signals to and from the communication control unit 220 of the mobile phone 200, and a control device 330 for integrally controlling each unit. A clock 340, a key input device 350, a display device 360, a storage device 370, the data communication connection I / F are provided to the control device 330 via a bus.
(Interface) 310 is connected. Further, the controller 330 has an external connection I / F (interface) 3.
80, a GPS 250, a printer 260, a digital camera 270, a scanner 280, an external storage device 29
0 is connected.

The processing performed by the base station 101 will be described with reference to FIG. The base station 101 has a radius of 100 m to 50 m.
The range of 0 m is covered, and the wireless channel information and the system information are constantly reported to the slaves (for example, the slave 100-1) in this range. In addition, allocation management of channels for transmitting and receiving data during a call is performed. Normally, as shown here as a process for the slave unit 100-2, an idle message is transmitted, and in response to a call from the slave unit 100-2 or an incoming call to the slave unit 100-2,
Slave device 100-2 sends a link channel assignment request, and base station 101 assigns a channel in response to the request. When the channel is blocked, the base station 101
Reject link channel assignment. In this case, as shown here for slave unit 100-3, slave unit 100-3 sends a link channel re-request.

[0010] The signal transmitted and received between the base station and the slave unit is:
As shown in FIG. 23, a signal going from the base station to the child station is called a downlink signal, and a signal going from the child device to the base station is called an uplink signal. As shown in FIG. 23, the upstream and downstream signals are switched every 2.5 ms in a cycle of 5 ms. 2.5 mS is divided into four blocks (called slots), and the first one of the four slots is allocated for a control signal. A superframe is formed by collecting m first slots of the downlink signal every n cycles to transmit a meaningful information. Also,
The first slot of the upstream signal is collected at predetermined intervals to form a superframe, and a plurality of slave units
Access the base station by the LOHA method.

FIG. 24 shows the contents of the above superframe. In a downlink superframe, first, a broadcast channel (BCC) on which information of a base station is carried.
H), and an incoming channel (PCH) used for calling a slave and a service channel (SCCH) carrying various types of service information. On the other hand, the upstream superframe is constituted by a service channel (SCCH) carrying service information by the slotted ALOHA method described above.

Slots transmitted and received between the base station and the slave unit are classified into a control physical slot shown in FIG. 25 and a communication physical slot shown in FIG. Each slot consists of 240 bits, 4 bits of transient response ramp time R, 2 bits of star and symbol SS, 64 to 6
It comprises a preamble PR of bits, a synchronization word UW of 32 to 16 bits, information I of 108 to 180 bits, and a CRC for error detection of 16 bits. Information I in the control physical slot further includes a BCCH
/ PCH and SCCH are identified by channel identification CI,
The transmission side identification information and the reception side identification information are added. The information I in the communication physical slot includes a 4-bit channel identification information CI, a 16-bit constantly transmitted associated control channel SACH, a 160-bit communication channel TCH identified by the channel identification information CI, and a high-speed associated control channel. It is composed of FACCH.

FIG. 27 shows a control sequence of location registration, which will be described. The slave unit sends a link channel establishment request to the base station (S1), and in response, the base station returns a link channel assignment to the slave unit (S2). Subsequently, a synchronization burst is sent from the slave unit to the base station (S3), and a synchronization burst is sent from the base station to the slave unit (S4), and synchronization is established. Next, the asynchronous equilibrium mode setting information SABM is sent from the slave to the base station (S5), and the base station returns non-numbered confirmation information UA to the slave (S6). Further, a location registration request MM is transmitted from the slave to the base station (S7), and then the slave sends a definition information request RT to request notification information (S8). Notification information is sent by the information response RT (S9). The slave unit having received the notification information further sends a function request RT (S10).
A function is requested to the network side, and when this is received, a function request response RT is returned from the base station (S11). Subsequently, the slave unit transmits the secret key to the base station by the secret key setting RT and transmits the secret key to the network (S12), and further requests the MM function from the network by sending a function request MM to the base station (S13). When this is accepted, the function request response MM is returned from the base station (S14). Therefore, the slave unit uses the location registration area report MM.
Is transmitted to the base station (S15), the network receives this, generates a random number, and notifies it by an authentication request MM (S16). The slave unit receives the random number from the authentication request MM, encrypts the random number with its own authentication key, and transmits the result to the base station as an authentication response MM (S17). When the network detects that the location registration has been normally completed, the base station transmits a location registration acceptance MM from the base station to the slave unit (S18), and transmits disconnection information DISC (S19). The handset returns non-numbered confirmation information UA in response (S20), and in response thereto, the base station sends a radio channel disconnection RT (S21). (S2
2) End a series of location registration operations.

FIG. 28 shows a control sequence in the case of transmitting a signal from the slave unit, which will be described. Steps S1 to S6 are the same as the position registration sequence. Then, the slave unit transmits the call setting information CC to the base station and starts the call setting (S25). In response to this, the network confirms the validity of the reception and returns the call setting reception information CC from the base station to the child device (S26). Thereafter, step S8
Steps S20 to S20 are the same as the steps of the corresponding numbers in the position registration sequence shown in FIG. 27, and these processes are performed. Then, when the network starts calling the called side, the network transmits the call information CC from the base station to the slave unit.
Is transmitted (S27). As a result, a ringing tone (ringback tone) is sent to the slave unit (S28). Then, when the network responds on the receiving side, the network transmits response information CC from the base station to the child device (S29). Thereby, the slave unit starts communication via the communication path (S3).
0).

FIG. 29 shows a control sequence for an incoming call, which will be described. The network indicates the incoming call by transmitting the incoming call information PCH from the base station to the slave unit (S31). In response to this, the handset performs the operations of steps S1 to S6 to establish the LCH (link channel), and returns the incoming call setting information RT to the base station (S32).
The network side receiving the call response information RT sends the call setting information CC from the base station to the slave unit (S33). The slave unit that has received the call setting information CC returns the call setting reception information CC (S3).
4). The subsequent steps S8 to S16 are the same as the steps of the corresponding numbers in the position registration sequence shown in FIG. 27, and these processes are performed. Step S1
The slave unit that transmitted the authentication response MM in step 6
C is transmitted (S35). Further, if there is an off-hook in the slave unit, the response information CC is transmitted (S3).
6). The network receiving the response information CC sends the response confirmation information CC (S37). Then, steps S19 and S20 are executed in order to disconnect the LCH, and the child device transits during communication (S38).

FIG. 30 shows a disconnection control sequence, which will be described. When the on-hook is performed in the slave unit during the call (S30), the slave unit transmits disconnection information CC (S41). The network receiving this,
The release information CC is transmitted from the base station to the slave unit (S42).
Upon receiving the release information CC, the slave unit releases the release completion information CC.
Is returned (S43). Next, disconnection information DIS is received from the network side.
C is transmitted (S45). The handset returns non-numbered confirmation information UA in response (S46), and in response thereto, the base station sends a radio channel disconnection RT (S47). And return (S
48), the cutting is completed.

FIG. 31 shows a control sequence for switching a communication channel, which will be described. When a channel needs to be switched during a call (S30), the slave transmits a TCH (information channel) switching request RT (S51). In response, the base station transmits a TCH (information channel) switching instruction RT including information on the switching destination TCH (information channel) (S52), and transmits a synchronization burst (S53). Next, the slave unit transmits a synchronization burst to the designated switching destination channel (S54). Further, the base station transmits a synchronization burst to the slave using the switching destination channel (S
55) Establish synchronization in the switching destination channel. The slave transmits the asynchronous balanced mode setting information SABM to the base station when the synchronization is established (S56), and the base station returns unnumbered confirmation information UA to the slave (S5).
7), the slave unit is engaged in a call using the switching destination channel (S5).
Transition to 8).

In the PHS operating as described above,
The base station covers a small zone (100 m to 400 m) and is capable of communication. Incidentally, how a plurality of base stations are arranged is not fixed. For example, FIG.
The base stations 101-11 to 101-14 are arranged so that the small zones Z10 to Z13 do not overlap, as shown in FIG. 33, or the base stations 101 to 22 except the base station 101-21 as shown in FIG. 101-24 small zones Z11-Z
13 are arranged so as to overlap with each other.

[0019]

FIG. 32 and FIG.
As shown in FIG. 3, the data is held by reading the document 120 or the like by the slave 100, and the small zone Z10
It moves to any one of Z13 and performs communication. However, in the case of FIG. 32, when going over the small zone, the user goes out of the communicable area and cannot transmit data properly. Also, even in the case of FIG. 33, data cannot be transmitted properly when crossing from the small zone Z10 to the next zone or when leaving the small zone Z13. Therefore, data must be transmitted while staying at one place within the communicable area.

However, even when transmitting data while staying in one place within the communicable area, there has been a problem that the reception state of radio waves is not always good and proper data transmission is not compensated. In general, it has been desired that data can be appropriately transmitted while moving.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the conventional data communication apparatus as described above, and an object of the present invention is to provide a data communication apparatus capable of performing data communication more appropriately even while moving. It is to provide a device.

[0022]

According to a first aspect of the present invention, there is provided a data communication apparatus, which performs another data communication with a base station having a communication area of a predetermined size via a radio line. A data communication device for performing data communication with a device, comprising: data input means for inputting data to be transmitted; transmission data storage means for storing data input from the data input means; A communicable range monitoring unit that monitors whether or not the communicable range is detected, based on a result of the monitoring performed by the communicable range monitor, that the data stored in the transmission data storage unit is detected. And a transmission control means for performing the transmission control described above. As a result, if it is detected that the call is within the communicable range, the stored data is transmitted.

A data communication apparatus according to a second aspect of the present invention performs data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size. A data communication device, comprising: data input means for inputting data to be transmitted; transmission data storage means for storing data input from the data input means; and data stored in the transmission data storage means. A communicable range monitor that monitors whether or not the communicator is in a communicable range, a timer that detects a continuous time in the communicable range based on the result of monitoring by the communicable range monitor, Transmission control means for controlling the transmission of the data stored in the transmission data storage means when it is detected that the continuous time in the communicable range exceeds a predetermined time. And wherein the door. by this,
When it is detected that the continuous time in the communicable range exceeds a predetermined time, the stored data is transmitted.

A data communication apparatus according to a third aspect of the present invention performs data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size. A data communication device, comprising: data input means for inputting data to be transmitted; transmission data storage means for storing data input from the data input means; and data stored in the transmission data storage means. A storage data amount obtaining means for obtaining the amount information of the communication data, a time calculating unit for calculating a continuous time to be within the communicable range based on the information obtained by the storage data amount obtaining means, A call range monitor that monitors whether the call is within the call range when
A timer for detecting a continuous time in the communicable range based on the result of monitoring by the communicable range monitoring unit; and a continuous time in the communicable range by the timer exceeding the predetermined time calculated by the time calculating unit. Transmission control means for controlling transmission of data stored in the transmission data storage means when the transmission data is detected. As a result, when it is detected that the continuous time in the communicable range exceeds the predetermined time corresponding to the amount of stored data, the stored data is transmitted.

A data communication apparatus according to a fourth aspect of the present invention performs data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size. A data communication device, comprising: data input means for inputting data to be transmitted; transmission data storage means for storing data input from the data input means; and data stored in the transmission data storage means. A radio field intensity measurement unit that measures the intensity of radio waves from the base station, and, based on the measurement result by the radio field intensity measurement unit, detects that the radio field intensity exceeds a predetermined value. Transmission control means for controlling transmission of data stored in the data storage means. As a result, when it is detected that the radio wave intensity exceeds the predetermined value, the stored data is transmitted.

A data communication apparatus according to a fifth aspect of the present invention performs data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size. A data communication device, comprising: data input means for inputting data to be transmitted; transmission data storage means for storing data input from the data input means; and data stored in the transmission data storage means. Accumulated data amount acquiring means for acquiring the amount information of the radio wave, a radio wave intensity calculating unit for calculating a radio wave intensity to be satisfied at the time of transmission based on the information acquired by the accumulated data amount acquiring means, and data transmitted to the transmission data accumulating means. If accumulated,
A radio field intensity measurement unit that measures the intensity of radio waves from the base station, and that the radio field intensity according to the measurement result by the radio field intensity measurement unit exceeds a predetermined value selected by the radio field intensity calculation unit has been detected. In this case, a transmission control unit for controlling transmission of the data stored in the transmission data storage unit is provided. As a result, when it is detected that the radio wave intensity exceeds a predetermined value corresponding to the amount of the stored data, the stored data is transmitted.

[0027] The data communication apparatus according to the sixth aspect of the present invention performs data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size. A data communication device, comprising: data input means for inputting data to be transmitted; transmission data storage means for storing data input from the data input means; and data stored in the transmission data storage means. In the case where the radio field intensity measurement unit that measures the intensity of the radio wave from the base station, based on the measurement result by this radio field intensity measurement unit, when it is detected that the radio field intensity is increasing,
Transmission control means for controlling transmission of data stored in the transmission data storage means. As a result, when it is detected that the radio wave intensity is increasing, the stored data is transmitted.

A data communication apparatus according to a seventh aspect of the present invention performs data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size. A data communication device, comprising: data input means for inputting data to be transmitted; transmission data storage means for storing data input from the data input means; and data stored in the transmission data storage means. Accumulated data amount acquiring means for acquiring the amount information of the radio wave, a radio wave intensity calculating unit for calculating a radio wave intensity to be satisfied at the time of transmission based on the information acquired by the accumulated data amount acquiring means, and data transmitted to the transmission data accumulating means. If accumulated,
A radio field intensity measurement unit that measures the intensity of radio waves from the base station, and detects that the radio field intensity according to the measurement result by the radio field intensity measurement unit exceeds a predetermined value selected by the radio field intensity calculation unit. And transmission control means for controlling transmission of data stored in the transmission data storage means when detecting that the radio field intensity is increasing. As a result, it is detected that the radio wave intensity exceeds a predetermined value corresponding to the amount of stored data, and when the radio wave intensity is increasing, the stored data is transmitted. Will be.

[0029] The data communication apparatus according to claim 8 of the present invention is characterized in that the data communication apparatus is provided with a radio wave intensity storage unit for storing the measurement result by the radio wave intensity measurement unit. As a result, the time-series data of the radio wave intensity, which is the measurement result by the radio wave intensity measurement unit, is stored, and it is possible to detect the increasing / decreasing tendency of the radio wave intensity.

According to a ninth aspect of the present invention, in the data communication apparatus, when the transmission of the stored data is not completed, the transmission control means performs the transmission control again when a predetermined condition is satisfied. As a result, if the transmission of the stored data does not end successfully, retransmission control is performed when predetermined conditions are satisfied,
It is possible to transmit data appropriately.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data communication apparatus according to an embodiment of the present invention will be described below with reference to the accompanying drawings. In the respective drawings, the same components are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 shows the configuration of the data communication device according to the first embodiment of the present invention. The data communication device includes a mobile phone 1 and an information adapter 2, and the information adapter 2 is connected to a GPS 3, a printer 4, a digital camera 5, a scanner 6, and an external storage device 7.

The mobile telephone 1 includes a communication control unit 1 including an RF transmitting / receiving unit 12 for transmitting / receiving radio waves to / from a base station via a wireless line, a modulation / demodulation unit, a TDMA / TDD processing unit, and the like.
0, a control device 11 for integrally controlling the entire mobile phone 1,
An input / display control device 13 for inputting and displaying data, a data switching device 15 for switching transmission / reception data, a voice encoding device 14 for encoding and decoding voice by ADPCM, a speaker 16 for outputting voice, and a voice input. Is provided. Further, a communication data presence / absence storage device 19 for storing the presence / absence of data to be transmitted is connected to the communication control unit 10, and a callable range monitoring unit 18 and a timer 9 are connected to the control device 11. ing. The communicable range monitoring unit 18 obtains an electric field strength signal from the RF transmission / reception unit 12 via the communication control unit 10 and the control device 11 and determines whether the signal is equal to or greater than a predetermined value, or obtains information of a superframe and changes its format. It is detected whether or not the data is properly received by checking whether or not the data is in a predetermined format or by performing CRC check by obtaining CRC data of the frame. If the result of this detection is YES, the communicable range monitoring unit 18 starts the timer 9 and
If NO, the timer 9 is stopped. A predetermined time-up time is set in the timer 9 in advance, and when the time-up time elapses without being stopped after being activated, the timer is notified to the control device 11.

On the other hand, the information adapter 2 has a portable telephone 1
A data communication connection I / F (interface) 23 for transmitting and receiving data via the control unit, a control signal I / F (interface) 22 for transmitting and receiving a control signal to and from the communication control unit 10 of the mobile phone 1, and control of each unit. A control device 21 for controlling is provided, and the control device 21 has a clock 26, a key input device 27, a display device 28, a storage device 24, the GPS
3, an external communication connection I / F (interface) 25 to which the printer 4, the digital camera 5, the scanner 6, and the external storage device 7 are connected. Then, the digital (still) camera 5, the scanner 6, and the key input device 27
Is data input means 8 for inputting data to be transmitted.
Function as In the present embodiment and other embodiments, when data written to the external storage device 7 is transmitted, the external storage device 7 also functions as an input unit. Further, the storage device 24 functions as transmission data storage means 29 in which data input from the input means 8 is stored.

In the data communication device according to the first embodiment, as shown in FIG. 2, a portable telephone 1 and an information adapter 2 are integrated. The GPS 3 connected to the information adapter 2 obtains position information via the mobile phone 1 and performs display or the like, the printer 4 is used for outputting a hard copy, and the digital camera 5 is used for inputting information of a captured image. The scanner 6 inputs document information, and the external storage device 7 is used to manage data. Whether the mobile phone 1 is used for a telephone call or the device on the information adapter 2 side is used for performing data communication depends on whether the communication of voice data is performed at the time of the call setting in FIGS. The call setting information includes whether the communication is digital data, and the data switching device 15 obtains this information via the communication control unit 10 to perform switching. That is, when the communication is audio data, the speaker 16, the microphone 17, the audio encoding device 14, and the communication control unit 1
A data transmission / reception path is formed between 0, and when communication of unrestricted digital data is performed, a data transmission / reception path between the communication control unit 10 and the data communication connection I / F 23 is formed.

FIGS. 3 and 4 show modified examples of the data communication apparatus according to the first embodiment. In this data communication device, as shown in FIG. 4, a mobile phone 1 and a mobile PC (personal computer) 30 are connected by a connector 40.
Are connected. The mobile PC 30 has a data communication connection I / F (interface) 33 for transmitting and receiving data via the mobile phone 1 and a control signal I / F for transmitting and receiving control signals to and from the communication control unit 10 of the mobile phone 1. (Interface) 32, and a control device 31 for integrally controlling each part are provided. The control device 31 is connected to a clock 36, a key input device 37, a display device 38, a storage device 34, and a handwriting input device 35 via a bus. I have. In this example, it functions as a data input unit for inputting data transmitted by the handwriting input device 35 and the key input device 37.

FIG. 5 shows a PHS as an example of a system in which the data communication device is used. Since this system is basically the same as the system shown in FIG. 19, the same numbers are given and duplicate explanations are omitted. This configuration example is different in that the data storage device 112 is connected to the packet network 107. The data storage device 112
A service in which data sent from a data communication device is used for storage, and the stored data is taken out by a partner (including unspecified and specified) or transmitted to the partner (specific data communication device). It is configured to perform.
The mobile phone 1 of the data communication device operates as a slave in this system, and communicates with the communication device of the other party via the base station by the method and sequence described in FIGS.

Further, as shown in FIG. 6, the control device 11 of the portable telephone 1
, A memory 52 composed of a ROM and a RAM and interfaces 53 and 54 are connected to each other. The processor 50 operates according to the program stored in the ROM of the memory 52, and receives a time-up notification from the timer 9 connected to the interface 53, that is, detects that the continuous time in the communicable range has exceeded a predetermined time. Then, it functions as a transmission control unit 55 that controls transmission of data stored in the transmission data storage unit 29.

Next, the operation of the data communication apparatus shown in FIG. 1 or 3 will be described. First, the user inputs data using the input means 8 of the data communication device shown in FIG. 1 or FIG. This data is stored in the transmission data storage means 29 by the control device 21 (31). Then, the user sends the destination data (destination telephone number) from the input / display control device 13.
And a data transmission command. Then, the control device 1
The first processor 50 receives this, and sets the destination data in the memory 52. Further, the control device 21 (31)
Is the communication control unit 10 via the control signal I / F 22 (32).
Is notified that there is data to be transmitted. Communication control unit 10
Sets a flag indicating the presence of transmission data in the communication data presence storage device 19.

In parallel with the above processing, the control device 11 and the like of the mobile phone 1 perform the processing of the flowchart shown in FIG. That is, the control device 11 detects whether the flag of the communication data presence / absence storage device 19 is set / reset via the communication control unit 10 and detects whether there is data to be transmitted (S6).
1). Here, when it is detected that there is data to be transmitted, the communicable range monitoring unit 18 obtains a signal or the like of the RF transmitting / receiving unit 12 via the control device 11 and the call control unit 10 and performs a communicable range monitoring process ( S62). Then, the communicable range monitoring unit 18 detects whether or not it is within the communicable range (S63), and when it detects that it is not within the communicable range,
Returning to step S61, the processing is continued, and if it is detected that the call is not within the communicable range, the communicable range monitor 18
Starts the timer 9 (S64). Then, it is detected whether or not it is within the communicable range (S65). If it is detected that it is not within the communicable range, the timer 9 is cleared (S66), and the process returns to step S61 to perform the processing. On the other hand, when it is detected that it is within the communicable range, the timer 9 is incremented (S67), and it is detected whether the time is up (S68). If time is not up,
Returning to step S65, the processing is performed. When the time is up, the control device 11, which has been notified from the timer 9, gives an instruction to the communication control unit 10 to perform data transmission control (S6).
9).

In the data transmission control in step S69, the control device 11 takes out the destination data from the memory 52 of FIG. 6 and gives an instruction to start data transmission to the communication control unit 10. The communication control unit 10 having received the instruction from the control device 11 controls the RF transmission / reception unit 12 based on the transmission destination data, and performs a calling process according to the sequence shown in FIG. When the partner data communication device responds, the communication control unit 10
Is a control device 21 via a control signal I / F 22 (32).
A data transfer instruction is given to (31). At this time, the data switching device 15 connects the path between the communication control unit and the data communication connection I / F 23 (33) based on the call setting information.
The control device 21 (31) reads out the data stored in the transmission data storage unit 29 and reads out the data communication I / F 23 (3
Transfer to the communication control unit 10 via 3). This data is transmitted from the data communication control unit 10 to the partner data communication device via the RF transmission / reception unit 12. When transmission of all data is completed, disconnection processing is performed according to the sequence shown in FIG.

FIG. 8 shows that the data communication apparatus is the base station 1
It is a figure showing what happens to data transmission when passing through zones 01-1, 101-2. In the example of FIG. 8, the hatched portion (c) indicates the communicable range.
Zones Z11-1, Z of base stations 101-1 and 101-2
11-2 partially overlaps and continuously passes through the communicable range except for the walking route C. It is assumed that the time-up time of the timer 9 is the time indicated by Δt in FIG. Then, in the walking route C, the timer 9 does not time out, and the data communication device does not transmit data. In the walking paths A and B, if the timer times out and data to be transmitted is accumulated, the data communication device transmits data. As a result, the data is appropriately transmitted. Depending on how to take a walking route, it is conceivable that the timer 9 times out immediately before leaving the communicable range. Is expected to be in a callable range, and data can be transmitted appropriately.

FIG. 9 shows a configuration example of a data communication device according to the second embodiment. In this configuration example, the mobile phone 1 </ b> A and the information adapter 2 are integrated, but may be connected by a connector as in a modification of the first embodiment. In the mobile phone 1A of this data communication device, the difference from the first embodiment is that the communication control unit 10 includes a transmission information amount storage device 5
7 is connected to the transmission information amount storage device 57, and a determination time calculation unit 58 is connected to the transmission information amount storage device 57, and the calculation result by the time calculation unit 58 is sent to the control device 11.
Then, the transmission information amount storage device 57 functions as a storage data amount obtaining unit 56 that obtains a storage amount of data to be transmitted stored in the storage device 24.

In the above data transmitting apparatus, a time-up value is set in the timer 9 by the processing of the flowchart shown in FIG. 10, which will be described. For example, the control device 21 interrupts the communication control unit 10 via the control signal I / F 22 when the transmission amount of the data to be transmitted stored in the storage device 24 increases or decreases, and the control device 21 stores the data in the storage device 24. And the transmission amount information of the data to be transmitted. Upon receiving this, the communication control unit 10 stores the transmission amount information in the transmission information amount storage device 57 (S70). Time calculation unit 58
Detects whether the transmission amount has been increased or decreased based on the transmission amount information stored in the transmission information amount storage device 57 (S7).
1). Here, if there is an increase or decrease, the time calculation unit 58 calculates and obtains a time-up value (S72). Specifically, assuming that the transmission amount information is transmitted as the number of bytes of data, a time-up value is obtained as n seconds by multiplying the number of bytes by a coefficient α. Next, the control device 11 obtains the calculation result from the time calculation unit 58 and sets it as a time-up value in the timer 9 (S73). The control device performs transmission control using the timer 9 as described in the first embodiment. As a result, as the amount of data to be transmitted increases, the continuous time to be within the communication range is increased, and it is generally guaranteed that data transmission is performed when the user stays at the same place. . Note that an upper limit may be set for the time-up value. That is, when the amount of transmission data exceeds a certain level, the upper limit is adopted, and it is possible to prevent the transmission timing from being missed when the amount of data is large.

FIG. 11 shows a configuration example of a data communication apparatus according to the third embodiment. In this configuration example, a mode is shown in which the mobile phone 1B and the information adapter 2 are integrated, but a mode in which the mobile phone 1B and the information adapter 2 are connected by a connector as in a modification of the first embodiment may be used. The mobile phone 1B of the data communication apparatus according to the first embodiment differs from the first embodiment in that a radio field intensity measuring section 59 is connected to the control device 11 instead of the talkable range monitoring section 18 and the timer 9 of the first embodiment. It is different from the form. The radio field intensity measurement unit 59 obtains an electric field intensity signal from the RF transmission / reception unit 12 via the control device 11 and the communication control unit 10, compares the signal with a predetermined value (radio field intensity) set in advance by the control device 11, When the value is equal to or more than the predetermined value, the control device 11 is notified.

In the data transmitting apparatus,
The data transmission is performed by the processing of the flowchart shown in FIG. First, the control device 11
The setting of the flag of the communication data presence / absence storage device 19 is detected via the communication control unit 10 to detect whether there is data to be transmitted (S74). Here, when it is detected that there is data to be transmitted, the radio wave intensity measurement unit 59 transmits the RF transmission / reception unit 12 via the control device 11 and the call control unit 10.
To obtain an electric field strength signal from the apparatus and measure the strength of the radio wave (S7).
5). Then, it is detected whether or not the intensity of the radio wave is equal to or more than a predetermined value (S76).
When the value is equal to or more than the predetermined value, the control device 11 is notified, and the control device 11
Data transmission control is performed by giving an instruction to 0 (S77). In this data transmission control, data is transmitted to the partner data communication device by the processing as already described with reference to FIG.

FIG. 13 is a diagram showing what happens to data transmission when the data communication apparatus according to the third embodiment passes through the zones of the base stations 101-1 and 101-2. In the example of FIG. 13, a portion where the electric field intensity is equal to or more than the electric field intensity E0 of (c) indicates the communicable range.
Zones Z11-1, Z of base stations 101-1 and 101-2
11-2 partially overlap, and when walking on the walking route A, the electric field intensity passes through a route exceeding the predetermined value E0. In the walking routes A and B, even if the electric field intensity does not exceed the predetermined value E0 and the data to be transmitted is stored, the transmission is not performed.

FIG. 14 shows a configuration example of a data communication device according to the fourth embodiment. In this configuration example, a mode in which the mobile phone 1D and the information adapter 2 are integrated is shown, but a mode in which the mobile phone 1D and the information adapter 2 are connected by a connector as in a modification of the first embodiment may be used. In the mobile phone 1D of this data communication device, a transmission information amount storage device 57 is connected to the communication control unit 10, and a radio field intensity calculation unit 60 is further connected to the transmission information amount storage device 57. The difference from the third embodiment is that the result is sent to the control device 11.

In the data transmitting apparatus according to the fourth embodiment, a predetermined value (electric field intensity) is set in the radio wave intensity measuring section 59 by the processing of the flowchart shown in FIG. 15, and this will be described. For example, when the transmission amount of the data to be transmitted stored in the storage device 24 increases or decreases, the control device 21 transmits the communication control unit 1 via the control signal I / F 22.
It interrupts 0 and sends the transmission amount information of the data to be transmitted accumulated in the storage device 24. Upon receiving this, the communication control unit 10 stores the transmission amount information in the transmission information amount storage device 57 (S80). The radio wave intensity measuring section 59 detects whether or not the transmission amount has increased based on the transmission amount information stored in the transmission information amount storage device 57 (S81). Here, if there is an increase or decrease, the radio field intensity calculator 60 calculates and obtains a predetermined value of the radio field intensity (S82). Specifically, assuming that the transmission amount information is transmitted as the number of bytes of data, a predetermined value is obtained by multiplying the number of bytes by a coefficient β. Next, the control device 11 obtains the calculation result from the radio wave intensity calculation unit 60 and sets a predetermined value in the radio wave intensity measurement unit 59 (S
83). The control device 11 performs the transmission control as described in the third embodiment in response to the notification that the radio wave intensity has become equal to or higher than the predetermined value as a result of the measurement by the radio wave intensity measurement unit 59. As a result, as the amount of data to be transmitted increases, it is guaranteed that data transmission will be performed when the radio wave is in a strong place. Note that an upper limit is set for the calculation result by the radio wave strength calculator 60. That is, when the data amount becomes equal to or more than the predetermined amount, the predetermined value is set to the upper limit, thereby preventing the setting of the radio wave intensity that is impossible when the transmission data amount increases.

FIG. 16 shows a configuration diagram of a data communication device according to the fifth embodiment. In this configuration example,
Although a mode in which the mobile phone 1E and the information adapter 2 are integrated is shown, a mode in which the mobile phone 1E and the information adapter 2 are connected by a connector as in the modification of the first embodiment may be used. In a mobile phone 1E of this data communication device, a radio field intensity measuring section 59 in the configuration of the mobile phone 1B of the third embodiment is used.
, A time-series data storage unit 61 is connected to the
9 is stored in the time-series data storage unit 61. Then, the control device 11 reads out the data of the radio wave intensity stored in the time-series data storage unit 61, detects whether the radio wave intensity is increasing in time series based on the data, and accumulates when it is increasing. Controls data transmission. Such transmission control is performed by the transmission control means 55 shown in FIG.

In the above data transmitting apparatus, data transmission is performed by the processing of the flowchart shown in FIG. 17, which will be described. First, in this embodiment, the radio wave intensity measurement unit 59 obtains an electric field intensity signal from the RF transmission / reception unit 12 via the control device 11 and the communication control unit 10 and measures the intensity of the radio wave. The operation of accumulating the intensity data in the time-series data storage unit 61 is always performed. The control device 11 detects the reset of the flag of the communication data presence / absence storage device 19 via the communication control unit 10, and detects whether there is data to be transmitted (S84).
Here, if it is detected that there is data to be transmitted, the control device 11 analyzes the increasing / decreasing tendency of the radio wave intensity based on the time-series radio wave intensity data stored in the time-series data storage unit 61 (S85). ). Then, it is detected whether the strength of the radio wave is increasing (S86). If the radio wave intensity is not increasing, the process returns to step S84 to continue the process. If the radio wave intensity is increasing, the controller 1
1, and the control device 11 gives an instruction to the communication control unit 10 to perform data transmission control (S87). In this data transmission control, data is transmitted to the partner data communication device by the processing as already described with reference to FIG.

FIG. 18 shows a configuration diagram of a data communication apparatus according to the sixth embodiment. In this configuration example,
Although a mode in which the mobile phone 1F and the information adapter 2 are integrated is shown, a mode in which the mobile phone 1F and the information adapter 2 are connected by a connector as in the modification of the first embodiment may be used. In the mobile phone 1F of the data communication device, the mobile phone 1E of the fifth embodiment and the mobile phone 1 of the fourth embodiment are different.
D is combined. That is, a predetermined value corresponding to the amount of data in which the radio field intensity is stored is calculated by the radio field intensity calculation unit 60, the predetermined value is set in the radio field intensity measurement unit 59, and it is determined whether or not the predetermined value is exceeded. Part 5
9 and assuming that this condition is satisfied, it is detected whether or not the radio wave intensity is increasing using the data of the time-series data storage unit 61. If the radio wave intensity is increasing, transmission is performed. The data stored in the data storage unit 29 is transmitted.

In the above data transmission apparatus, data transmission is performed by the processing of the flowchart shown in FIG. 19, which will be described. First, in the sixth embodiment, the radio field intensity measurement unit 59 obtains an electric field intensity signal from the RF transmission / reception unit 12 via the control device 11 and the call control unit 10 and measures the intensity of the radio wave. The operation of accumulating the radio field intensity data according to the above in the time-series data storage unit 61 is always performed. The control device 11 detects the reset of the flag of the communication data presence / absence storage device 19 via the communication control unit 10 and detects whether there is data to be transmitted (S9).
1). Here, when it is detected that there is data to be transmitted, the radio wave intensity measurement unit 59 obtains an electric field intensity signal from the RF transmission / reception unit 12 via the control device 11 and the call control unit 10 and measures the radio wave intensity. (S92). Then, it is detected whether or not the intensity of the radio wave is equal to or higher than a predetermined value (S93). If the intensity is lower than the predetermined value, the process returns to step S91 to continue the processing. The increase / decrease tendency of the radio wave intensity is analyzed based on the time-series radio wave intensity data stored in the data storage unit 61 (S94). Then, it is detected whether the strength of the radio wave is increasing (S9).
5). If the strength of the radio wave is not increasing, the process returns to step S91 to continue the process. If the strength of the radio wave is increasing, a notification is sent to the control device 11, and the control device 11 The data transmission control is performed by giving an instruction to S10 (S96). In this data transmission control,
The data is transmitted to the partner data communication device by the processing as already described with reference to FIG. The predetermined value used for detecting that the intensity of the radio wave by the radio wave intensity measuring unit 59 is equal to or more than the predetermined value is the same as that of the mobile phone 1D of the fourth embodiment described with reference to FIGS. , And are set by the radio wave intensity calculation unit 60.

In the above-described first to sixth embodiments, there is a case where data transmission to the data communication device of the other party succeeds, but it ends in failure or during a call (busy) or the like. There can be. In such a case, for example, the control device 11 performs the transmission try again after a predetermined time. If the transmission is not completed, the same operation is repeated, for example, a predetermined number of times.
Further, in each of the above embodiments, the data transmission is performed after performing the detection operation of whether or not the predetermined condition is always satisfied. In the modified example of each of the embodiments, the operation is performed as in each of the embodiments. Alternatively, the mode can be set by inputting from the input / display control device 13 whether the data transmission is to be performed immediately after the transmission of the dial number of the transmission destination, the input of the data transmission command and the response of the other party. In this variation,
Which mode is set is set in, for example, the memory 52 in FIG. 6. When a dial number of a transmission destination is input, the operation is performed by referring to the setting information in the memory 52. According to such a modification, data transmission can be performed when the user desires.

[0054]

As described above, according to the data communication apparatus of the first aspect, when it is detected that the data is in the communicable range, the stored data is transmitted. Therefore, appropriate data transmission is performed.

As described above, according to the data communication apparatus of the second aspect, when it is detected that the continuous time in the communicable range exceeds a predetermined time, the transmission of the stored data is performed. Therefore, data transmission is appropriately performed when it is expected that the call is still within the communication range.

As described above, according to the data communication apparatus of the third aspect, it is detected that the continuous time in the communicable range exceeds the predetermined time corresponding to the amount of the stored data. Then, since the stored data is transmitted, the data transmission is appropriately performed when it is expected that the data is within the communicable range corresponding to the transmission data amount.

As described above, according to the data communication device of the fourth aspect, when it is detected that the radio wave intensity exceeds a predetermined value, the stored data is transmitted. Therefore, data is automatically transmitted from a position having an appropriate radio wave intensity and data can be appropriately transmitted.

As described above, according to the data communication apparatus of the fifth aspect, when it is detected that the radio wave intensity exceeds the predetermined value corresponding to the amount of the stored data, the data is stored. Since the transmitted data is transmitted, the data is automatically transmitted from the position of the radio wave intensity corresponding to the transmission data amount, and the data can be transmitted appropriately.

As described above, according to the data communication apparatus of the sixth aspect, when it is detected that the radio field intensity is increasing, the stored data is transmitted. Automatic transmission is performed while the radio wave intensity increases, and appropriate data transmission is guaranteed.

As described above, according to the data communication apparatus of the seventh aspect, it is detected that the radio wave intensity exceeds a predetermined value corresponding to the amount of the stored data, and the radio wave intensity is detected. When there is an increasing trend, the stored data will be transmitted.Therefore, at the position of the radio wave intensity according to the amount of transmitted data, the data is automatically transmitted while the radio wave intensity is increasing and the data is appropriately transmitted. Can be sent.

As described above, according to the data communication apparatus of the eighth aspect, the time series data of the radio field intensity, which is the measurement result of the radio field intensity measurement section, is stored, and the increase / decrease tendency of the radio field intensity can be detected. It becomes possible.

As described above, according to the data communication apparatus of the ninth aspect, if the transmission of the stored data does not end successfully, the retransmission control is performed when a predetermined condition is satisfied, and the data transmission is appropriately performed. Can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a data communication device according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a connection relationship of each element in the data communication device according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of a modified example of the data communication device according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a connection relationship of each element in a modification of the data communication device according to the first embodiment of the present invention.

FIG. 5 is a system configuration diagram of a PHS to which the present invention is applied.

FIG. 6 is a main part configuration diagram of a data communication device according to an embodiment of the present invention.

FIG. 7 is a flowchart for explaining the operation of the data communication device according to the first embodiment of the present invention.

FIG. 8 is a diagram for explaining a data transmission operation by the data communication device according to the first embodiment of the present invention.

FIG. 9 is a configuration diagram of a data communication device according to a second embodiment of the present invention.

FIG. 10 is a flowchart for explaining the operation of the data communication device according to the second embodiment of the present invention.

FIG. 11 is a configuration diagram of a data communication device according to a third embodiment of the present invention.

FIG. 12 is a flowchart for explaining the operation of the data communication device according to the third embodiment of the present invention.

FIG. 13 is a diagram for explaining a data transmission operation by the data communication device according to the third embodiment of the present invention.

FIG. 14 is a configuration diagram of a data communication device according to a fourth embodiment of the present invention.

FIG. 15 is a flowchart for explaining the operation of the data communication device according to the fourth embodiment of the present invention.

FIG. 16 is a configuration diagram of a data communication device according to a fifth embodiment of the present invention.

FIG. 17 is a flowchart for explaining the operation of the data communication device according to the fifth embodiment of the present invention.

FIG. 18 is a configuration diagram of a data communication device according to a sixth embodiment of the present invention.

FIG. 19 is a flowchart for explaining the operation of the data communication device according to the sixth embodiment of the present invention.

FIG. 20 is a diagram showing a system configuration of a PHS.

FIG. 21 is a configuration diagram of a data communication device according to a conventional example.

FIG. 22 is a diagram showing an operation of a PHS system base station.

FIG. 23 is a diagram for explaining a data frame transmitted and received between a PHS system base station and a slave unit.

FIG. 24 is a diagram for explaining a data frame transmitted and received between a PHS system base station and a slave unit.

FIG. 25 is a view for explaining a data frame transmitted and received between a PHS system base station and a slave unit.

FIG. 26 is a view for explaining a data frame transmitted and received between a PHS system base station and a slave unit.

FIG. 27 is a diagram showing a location registration sequence between a PHS system base station and a child device.

FIG. 28 is a diagram showing a calling sequence between a PHS system base station and a slave unit.

FIG. 29 is a diagram showing an incoming call sequence between a PHS system base station and a slave unit.

FIG. 30 is a diagram showing a disconnection sequence between the PHS system base station and the child device.

FIG. 31 is a view showing a channel change sequence between a PHS system base station and a slave unit.

FIG. 32 is an explanatory diagram in the case where a slave unit passes through a zone of a base station.

FIG. 33 is an explanatory diagram of a case where a child device passes through a zone of a base station.

[Explanation of symbols]

1, (1A to 1F) Mobile phone 2 Information adapter 3 GPS 4 Printer 5 Digital camera 6 Scanner 7 External storage device 8 Input means 9 Timer 10 Communication control unit 12 RF transmission / reception unit 13 Input /
Display control unit 18 Talkable range monitoring unit 29 Transmission data storage unit 55 Transmission control unit 56 Stored data amount acquisition unit 57 Transmission information amount storage unit 58 Time calculation unit 59 Radio field intensity measurement unit 60 Radio field intensity calculation unit 61 Time series data storage unit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Minoru Iwaki, Inventor 3-1-1, Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant Co., Ltd. (72) Inventor Ken Fuchigami 3-1-1, Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant (72) Inventor Masanori Terasaki 3-1, 1-1 Asahigaoka, Hino-shi, Tokyo Inside the Toshiba Hino Plant (72) Inventor Hiroshi Ogasawara 1-3-1, Asahigaoka, Hino-shi, Tokyo (72) Inventor Taro Omura 3-1, 1-1 Asahigaoka, Hino-shi, Tokyo Inside Toshiba Hino Factory

Claims (9)

[Claims] 1. A data communication device for performing data communication with another data communication device via a wireless line with a base station each having a communication area of a predetermined size for inputting data to be transmitted. Data input means, transmission data storage means for storing data input from the data input means, a communicable range monitor for monitoring whether or not the communicable range exists, and a communicable range monitor Transmission control means for controlling transmission of data stored in the transmission data storage means when it is detected that the communication data is within the communicable range based on the monitoring result. apparatus. 2. A data communication apparatus for performing data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size for inputting data to be transmitted. Data input means, transmission data storage means for storing data input from the data input means, a communicable range monitor for monitoring whether or not the communicable range exists, and a communicable range monitor A timer for detecting a continuous time in the communicable range based on the monitoring result; and when the timer detects that the continuous time in the communicable range exceeds a predetermined time, the timer stores the continuous time in the transmission data storage means. And a transmission control means for controlling transmission of the data. 3. A data communication apparatus for performing data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size for inputting data to be transmitted. Data input means, transmission data storage means for storing data input from the data input means, stored data amount obtaining means for obtaining information on the amount of data stored in the transmission data storage means, A time calculating unit that calculates a continuous time that should be within the communicable range based on the information acquired by the accumulated data amount acquiring unit; a communicable range monitoring unit that monitors whether or not the communicable range exists; A timer for detecting a continuous time in the communicable range based on the monitoring result by the range monitoring unit; and a timer calculating the continuous time in the communicable range by the timer. When it is detected that exceeds a, predetermined time, the data communication apparatus characterized by comprising a, a transmission control means for performing transmission control of data accumulated in the transmission data storage unit. 4. A data communication device for performing data communication with another data communication device via a radio line with a base station each having a communication area of a predetermined size for inputting data to be transmitted. Data input means, transmission data storage means for storing data input from the data input means, a radio field intensity measuring section for measuring the intensity of radio waves from the base station, and a measurement result by the radio field intensity measuring section And a transmission control means for controlling transmission of data stored in the transmission data storage means when detecting that the radio field intensity exceeds a predetermined value based on the data communication. apparatus. 5. A data communication device for performing data communication with another data communication device via a radio line with a base station each having a communication area of a predetermined size for inputting data to be transmitted. Data input means, transmission data storage means for storing data input from the data input means, stored data amount obtaining means for obtaining information on the amount of data stored in the transmission data storage means, Based on the information acquired by the accumulated data amount acquisition means, a radio field intensity calculation unit that calculates a radio field intensity to be satisfied at the time of transmission, a radio field intensity measurement unit that measures the intensity of radio waves from the base station, and a radio field intensity measurement unit The radio field intensity according to the measurement result by
Transmission control means for controlling transmission of data stored in the transmission data storage means when detecting that the predetermined value selected by the radio field intensity calculation unit is exceeded. Data communication device. 6. A data communication device for performing data communication with another data communication device via a wireless line with a base station each having a communication area of a predetermined size for inputting data to be transmitted. Data input means, transmission data storage means for storing data input from the data input means, a radio field intensity measuring section for measuring the intensity of radio waves from the base station, and a measurement result by the radio field intensity measuring section And a transmission control unit that controls transmission of data stored in the transmission data storage unit when detecting that the radio field intensity is increasing based on the data communication apparatus. 7. A data communication apparatus for performing data communication with another data communication apparatus via a radio line with a base station each having a communication area of a predetermined size for inputting data to be transmitted. Data input means, transmission data storage means for storing data input from the data input means, stored data amount obtaining means for obtaining information on the amount of data stored in the transmission data storage means, Based on the information acquired by the accumulated data amount acquisition means, a radio field intensity calculation unit that calculates a radio field intensity to be satisfied at the time of transmission, a radio field intensity measurement unit that measures the intensity of radio waves from the base station, The radio field intensity according to the measurement result by
When it is detected that the radio field intensity exceeds a predetermined value selected by the radio field intensity calculation unit, and further when it is detected that the radio field intensity is increasing, transmission control of data stored in the transmission data storage unit is performed. And a transmission control means for performing the following. 8. The data communication device according to claim 6, further comprising a radio wave intensity storage unit for storing a measurement result by the radio wave intensity measurement unit. 9. The data communication according to claim 1, wherein the transmission control means performs transmission control again when a predetermined condition is satisfied when all the stored data is not transmitted. apparatus.