JP2595911B2 - Mobile radio system and mobile radio terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile radio system and a mobile radio terminal, and more particularly, to a mobile radio system in which the mobile radio terminal transmits information to a base station by radio, and a mobile radio terminal used in the system. .

[0002]

2. Description of the Related Art Conventionally, in a mobile radio system, a system has been constructed on the assumption that a service area continues continuously without interruption. Therefore, the mobile wireless terminal device is usually located in the service area, and when transmitting information using such a system, it can always be transmitted.

FIG. 3 is a block diagram showing an example of a conventional mobile radio system and a mobile radio terminal. As shown in the figure,
The mobile radio system includes a mobile radio terminal 200 and a base station 3.
01. Although not shown in FIG. 3, a plurality of mobile wireless terminal devices 200 can exist simultaneously in the wireless zone of the base station 301.

The mobile radio terminal 200 has an antenna 20
1, switch 202, receiving section 203, demodulator 204, electric field strength detecting section 205, modulator 206, transmitting section 207, control section 208, storage section 209, display section 210, input section 21
1 and 212 and a power supply (battery) 213. The input unit 211 is, for example, a keyboard, and the input unit 212 is, for example, a push switch. The output DC power of the power supply 213 is supplied as a power supply voltage to each unit in the mobile wireless terminal device 200.

Next, the operation will be described. At the time of transmission, the mobile radio terminal device 200 stores, for example, information input by the input unit 211 in the storage unit 209 via the control unit 208. On the other hand, the signal transmitted from the base station 301 is transmitted to the receiving unit 20 via the antenna 201 and the switch 202.
3, the signal is amplified by the control unit 2 via the demodulator 204.
08, and also supplied to the electric field intensity detection unit 205 to measure the received electric field intensity.

[0006] The measured received electric field strength is transmitted to the control unit 208.
And is displayed on the display unit 210. The user confirms the display of the electric field strength on the display unit 210 and checks the input unit 2.
12 is operated, the control unit 208 is operated at the operation timing.
Reads information stored in the storage unit 209 and inputs the information to the modulator 206. The information modulated by the modulator 206 using a predetermined modulation scheme is converted into a transmission frequency band by the transmission unit 207, and then transmitted to the base station 301 via the switch 202 and the antenna 201. Therefore, in this conventional mobile radio terminal device 200, a transmission instruction is given by the input unit 212.

[0007]

However, when the electric field between the mobile radio terminal 200 and the base station 301 is not sufficient for communication because the mobile radio terminal 200 is used while moving. There is. In addition, compared to the transmission power and antenna gain of the base station 301, the mobile radio terminal 20
Since the transmission power and the antenna gain on the 0 side are low, it is not always possible to always send information from the mobile radio terminal device 200 to the base station 301. Therefore, as described above, in the conventional mobile wireless terminal device 200, the user confirms the display of the electric field strength on the display unit 210 and operates the input unit 212 to give a transmission instruction.

However, since the electric field strength constantly changes depending on the surrounding conditions, it is extremely troublesome for the user to constantly monitor the timing of transmission at the display on the display unit 210 and transmit only when the electric field strength is sufficient. . On the other hand, it is also conceivable to always transmit without monitoring the electric field strength, but in that case, useless radio waves are transmitted, and the power consumption of the power supply 213 of the mobile wireless terminal device 200 becomes large. This leads to faster battery consumption.

Even in such a case, in order to secure the life of the power supply 213 for a predetermined time or more, a large-capacity and large power supply (battery) is required, so that the entire apparatus cannot be reduced in size and weight. This is fatal for the mobile wireless terminal device 200 used while moving.

Therefore, the mobile radio terminal 200 is small and compact.
In order to reduce the weight, it is necessary to secure a continuous service area so that sufficient electric field strength can be obtained at all times. There is no choice but to increase the investment in the system, such as improving receiver sensitivity and installing high-gain antennas.

The present invention has been made in view of the above points,
It is an object of the present invention to provide a mobile radio system and a mobile radio terminal device that can have a small and lightweight configuration of a mobile radio terminal device and can suppress a decrease in the life of a battery power source without performing a complicated operation by a user. I do.

[0012]

In order to achieve the above object, a mobile radio system according to the present invention provides a mobile radio system which performs radio communication between a base station and a mobile radio terminal having a battery as a power source. The station has means for periodically transmitting a pilot signal, and means for storing information transmitted from the mobile radio terminal and returning it to the mobile radio terminal as it is. The power of the power supply is supplied to the reception unit and the electric field strength detection unit, and the reception electric field strength of the pilot signal is detected by the electric field strength detection unit.When the reception electric field strength is larger than the set value, the power of the power supply is transmitted to the transmission circuit block. After switching and transmitting the desired transmission information to the base station via the transmission circuit block,
The power is switched to the receiving circuit block, the information from the base station is received and compared with the transmission information, the transmission of the transmission information and the reception of the information returned from the base station and the reception information are performed until the two match. The configuration is such that comparison and collation with transmission information are repeated, and when the two match, the power supply of the power supply is cut off.

Also, the mobile radio terminal device of the present invention can transmit the transmission information via an antenna and transmits the information input from the base station via the antenna so as to be applicable to the mobile radio system. A receiving circuit block for receiving and demodulating, a transmitting circuit block, a switching unit for performing switching connection between the receiving circuit block and the antenna, an electric field intensity detecting unit for detecting an electric field intensity of a received signal from the receiving circuit block, An input unit for inputting transmission instruction information, a power supply constituted by a battery, a storage unit for storing at least desired transmission information input by the input unit, and power from the power supply based on the transmission instruction information from the input unit. And control means for performing switching input to each unit, reading out transmission information from the storage unit, and comparing and comparing received information with transmission information. That.

[0014]

In the mobile radio system and the mobile radio terminal device according to the present invention, when the received electric field strength is larger than the set value, the power of the power source is switched to the transmission circuit block and desired transmission information is transmitted to the base via the transmission circuit block. Since the transmission is performed to the station, only in a strong electric field where the received signal strength of the pilot signal is larger than the set value, the component circuit in the mobile radio terminal required for the transmission is automatically activated to perform the desired transmission. Information can be sent to the base station.

[0015] Further, information from the base station is received and compared with transmission information, transmission of transmission information and reception of information returned from the base station and comparison of the received information with the transmission information until they match. Since the collation is repeated, desired transmission information can be transmitted until the transmission information is correctly received by the base station.

[0016]

Next, an embodiment of the present invention will be described. FIG. 1 shows a configuration diagram of an embodiment of the present invention. This embodiment includes a mobile radio terminal device 100 and a base station 301. Although not shown in FIG. 1, a plurality of mobile wireless terminal devices 100 can exist simultaneously in a wireless zone of the base station 301. The base station 301 has a storage unit 302. In addition,
In FIG. 1, solid arrows indicate the flow of data signals, and dotted arrows indicate the flow of control signals.

The mobile radio terminal 100 has an antenna 10
1, switch 102, receiving section 103, demodulator 104, electric field strength detecting section 105, modulator 106, transmitting section 107, control section 108, display section 109, transmission storage section 110, storage storage section 111, input section 112, A power supply (battery) 114 and a power supply driving unit 115 are provided.

The input unit 112 is, for example, an input device such as a keyboard capable of inputting information including characters and numerals, and the input unit 113 is, for example, a push switch. The output DC power of the power supply 114 is supplied as a power supply voltage to each unit in the mobile wireless terminal device 100 via the power supply driving unit 115. The power supply driving unit 115 is a switch circuit that allows the power supply voltage to each component to be passed through or cut off independently for each component according to the output control signal of the control unit 108.

The receiving unit 103 and the demodulator 104 constitute a receiving circuit block A, and the modulator 106 and the transmitting unit 1
Reference numeral 07 denotes a transmission circuit block B. The receiving unit 103 and the electric field intensity detecting unit 105 constitute an electric field intensity detecting circuit block C.

Next, the operation of this embodiment shown in FIG. 1 will be described with reference to FIG.
This will be described with reference to the flowchart of FIG. This embodiment is characterized in the transmission operation. Information to be transmitted before the transmission operation is input from the input unit 112 in advance. The input transmission information is stored in the transmission storage unit 110 by the control unit 108 and is displayed on the display unit 109.

In this state, first, the user operates the input unit 113 to instruct information transmission (step 11). Then, the control unit 108 controls the power supply driving unit 115 to supply the DC power from the power supply 114 to the electric field intensity detection circuit block C including the switch 102, the reception unit 103, and the electric field intensity detection unit 105 (step 12). .

On the other hand, since the pilot signal is periodically transmitted from the base station 301, the pilot signal is received by supplying power to the electric field intensity detection circuit block C, and the electric field intensity is detected. The measurement is performed by section 105 (step 13), and it is determined whether the measured reception electric field strength of the pilot signal is higher than a set value (step 14). When the measured reception field strength of the pilot signal is higher than the set value, field strength detection section 105 sends a signal to control section 108 (step 1).
5).

After confirming that the measured reception electric field strength of the pilot signal is higher than the set value, control section 108 determines whether or not information to be transmitted is stored in transmission storage section 110 (step 16). If it is, the control unit 108 controls the power supply driving unit 115 to supply the DC power from the power supply 114 to the transmission circuit block B including the modulator 106 and the transmission unit 107, and puts this into a standby state (step 17). . Note that when the information to be transmitted is not stored in the transmission storage unit 110, the transmission circuit block B does not enter the standby state, and thus transmission is not performed.

When the control unit 108 puts the transmission circuit block B in the standby state, the control unit 108 subsequently reads out the information stored in the transmission storage unit 110 and reads the modulator 106 in the standby state.
, And converted to a high-frequency signal in a transmission frequency band by the transmission unit 107, and then the switch 102 and the antenna 10
1 to the base station 301 (step 18).
At this time, information being transmitted is displayed on the display unit 109.

When the transmission of information to base station 301 is completed in this way (step 19), control unit 108 sets switch 1
02 is switched to the receiving unit 103 side, and at the same time, the power supply driving unit 115 is controlled to switch and supply the DC power from the power supply 114 from the transmitting circuit block B to the transmitting circuit block A including the receiving unit 103 and the demodulator 104. (Steps 20, 21).

When the base station 301 receives the information transmitted from the mobile radio terminal 100, the base station 301 stores and stores the received information in its storage unit 302, modulates the information and returns it to the mobile radio terminal 100. At this time, the base station 301
Operates to increase the reception probability of mobile radio terminal apparatus 100 by making the transmission power larger than that at the time of transmitting the pilot signal.

The information returned from the base station 301 is received by the mobile radio terminal device 100, and is transmitted to the control unit 10 via the antenna 101, the switch 102 and the receiving circuit block B.
8 is discriminated as to whether the information is the same as the information stored in the transmission storage unit 110 (step 22).

The information returned from the base station 301 should originally be the same as the information stored in the transmission storage unit 110. Therefore, when it is determined that the information is the same as the result of the above identification, the base station Upon determining that the information has been correctly received by the control unit 301, the control unit 108 controls the power supply driving unit 115 to cut off the supply of DC power from the power supply 114 to the receiving unit 103, the demodulator 104, and the electric field strength detection unit 105. (Step 23), wasteful power consumption is prevented.

On the other hand, when it is determined in step 22 that the received information is different from the information stored in the transmission storage unit 110, the control unit 108 controls the power supply driving unit 115 to
Is supplied again to the switch 102, the receiving unit 103, and the electric field strength detecting unit 105, and the base station 30
Wait for the reception of the pilot signal from the P.1 (step 12,
13). When the pilot signal is received with the electric field strength equal to or higher than the set value, the operation after step 15 is performed again.

As described above, according to this embodiment, the same information as the information transmitted from mobile radio terminal apparatus 100 is returned from base station 301, and the above steps 12 to 22 are performed until the information is received. Is repeated.

When it is determined that the information returned from the base station 301 is the same as the information stored in the transmission storage unit 110, the control unit 108 controls the power supply driving unit 115 to The supply of DC power from 114 to the receiving unit 103, the demodulator 104, and the electric field strength detecting unit 105 is cut off (step 23), and the stored information is transferred from the transmission storage unit 110 to the storage storage unit 111 (step 24). At this time, the control unit 108 displays on the display unit 109 that information has been correctly transmitted to the base station 301.

The transmission information received by the base station 301 is transmitted to the partner terminal and is transmitted to the mobile radio terminal 100.
Will be notified that there is an outgoing call.

Therefore, according to the present embodiment, the information transmission timing can be automatically set without the user monitoring the display on the display unit, so that the operability can be improved.
Further, since power consumption can be minimized, a small and lightweight power source 114 can be used as a battery. In addition, when the power supply 114 having the same size as the conventional power supply is used, the life can be extended. Since transmission is automatically performed at the optimal timing, there is no need to continuously provide service areas, thereby minimizing system investment such as adding base stations and increasing base station transmission power. it can.

It should be noted that the present invention is not limited to the above embodiment, and for example, it is not always necessary to provide the storage unit 111. Further, the transmission storage unit 110 and the storage storage unit 1
It is not necessary to separate 11 from the hardware, and it is also possible to set a flag for distinguishing the transmission information and the maintenance information with the same hardware and distinguish these pieces of information.

That is, the presence / absence of transmission information in one storage unit is determined based on the presence / absence of a flag, and if there is a flag when there is transmission information, an operation is performed to transmit the transmission information when other conditions are satisfied. I do. Thereafter, the transmission information from the base station is compared with the transmission information in the storage unit, and when the transmission information is determined to be correctly transmitted to the base station and stored when the two match, the above-described information in the storage unit is read. The flag is reset, and information stored in the storage unit is determined as maintenance information.

[0036]

As described above, according to the mobile radio system and the mobile radio terminal of the present invention, transmission is automatically performed only in a strong electric field where the received signal strength of the pilot signal is larger than the set value. In order to transmit the desired transmission information to the base station by activating the constituent circuit in the mobile radio terminal required for the transmission, the user of the mobile radio terminal constantly monitors the electric field strength display on the display unit and transmits the transmission timing. The transmission information can be transmitted at the optimal transmission timing without judging the power consumption, so that the operability can be improved, unnecessary radio waves are not transmitted, and the battery power is reduced to a minimum necessary power consumption. Can be used which is smaller and lighter than before, so that the entire device can be made smaller and lighter. Further, when a battery having the same capacity as that of the conventional battery is used, the battery can have a longer life than the conventional battery.

Further, according to the present invention, it is possible to transmit transmission information at an optimal transmission timing when the mobile radio terminal device is located in the service area without necessarily securing the service area continuously. Therefore, it is not necessary to take measures such as an increase in the number of installed base stations and an increase in the transmission power of the base station, and investment in the system can be minimized.

Further, according to the present invention, information from a base station is received and compared with transmission information, transmission of transmission information, reception of information returned from the base station, and reception of the information until the two match. And transmission information are repeatedly compared and collated, and the desired transmission information is transmitted until the transmission information is correctly received by the base station. Reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of FIG. 1;

FIG. 3 is a configuration diagram of a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 Mobile wireless terminal device 102 Switch 103 Receiving unit 105 Field strength detecting unit 107 Transmitting unit 108 Control unit 109 Display unit 110 Transmission storage unit 111 Storage storage unit 112, 113 Input unit 114 Power supply (battery) 115 Power supply driving unit 301 Base station 302 storage unit A receiving circuit block B transmitting circuit block C electric field strength detecting circuit block

Claims (3)

(57) [Claims] 1. A mobile radio system for performing radio communication between a base station and a mobile radio terminal device having a battery as a power source, wherein the base station periodically transmits a pilot signal, and the mobile radio terminal Means for storing the information transmitted from the device and returning the information to the mobile wireless terminal device as it is, wherein the mobile wireless terminal device supplies the power of the power source to a receiving unit and an electric field strength detecting unit by a transmission operation The received electric field strength of the pilot signal is detected by the electric field strength detection unit,
When the received electric field strength is greater than a set value, the power of the power supply is switched to a transmission circuit block, and desired transmission information is transmitted to the base station via the transmission circuit block. Receiving the information from the base station and comparing it with the transmission information, transmitting the transmission information and receiving the information returned from the base station, and receiving the information and the transmission until the two match. A mobile radio system, wherein the comparison and collation with information are repeated, and when both match, the power supply of the power supply is cut off. 2. A mobile wireless terminal device for periodically transmitting a pilot signal and wirelessly communicating with a base station having means for returning and transmitting received information as it is, transmitting transmission information via an antenna. A transmitting circuit block that performs reception and demodulation of information input from the base station via the antenna; a switching unit that performs switching connection between the transmitting circuit block and the receiving circuit block and the antenna; An electric field intensity detection unit for detecting an electric field intensity of a reception signal from a reception circuit block; an input unit for inputting transmission information and transmission instruction information; a power supply constituted by a battery; and a desired power input from at least the input unit. A storage unit for storing transmission information, and based on transmission instruction information from the input unit, a switch input to each unit of power from the power supply, and Control means for reading out the transmission information from the storage unit and comparing and comparing the reception information with the transmission information, wherein the control means switches the power from the power supply based on the transmission instruction information from the input unit. Means, a receiving circuit block and an electric field strength detecting unit, respectively, and only when the electric field strength of the pilot signal detected by the electric field strength detecting unit is larger than a set value, the power from the power source is supplied to the transmitting circuit block. Switch input, and, after reading the transmission information in the storage unit and transmitting to the base station via the transmission circuit block and the switching means, switching the power supply to the reception circuit block, by the reception circuit block Performing a comparison and comparison of the information returned from the received base station and the stored transmission information of the storage unit,
A mobile radio terminal device which repeats the transmission of the transmission information in the storage unit and the comparison and collation of the transmission information with the transmission information until the two coincide with each other. 3. The first storage unit for storing transmission information.
And a second storage unit for storing transmission information. The control unit, when the information returned from the base station matches the transmission information stored in the first storage unit, The power supply to the circuit block and the electric field strength detection unit is stopped, and the transmission information stored in the first storage unit is transmitted to the second storage unit.
The mobile radio terminal device according to claim 2, wherein the mobile radio terminal device is stored in a storage unit.