JPH11331933A - Mobile radio communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide mobile radio communication equipment capable of attaining improvement in throughput by preventing disconnection of a communication link with a base station caused by the elapse of holding time. SOLUTION: A clock part 43 is provided for counting time while using a crystal oscillator or the like and equipped with a timer function. This function is started corresponding to an instruction from a control part 40 and after the time t1, it is reported to the control part 40. In this case, the time t1 is set shorter than the holding time t0 for holding the communication link with the base station. A dummy data storage area 41a is an area for storing preset meaningless dummy data and data for detecting an error at the base station or communicating party's station are set to such dummy data. After the prescribed time t1 from the transmission of packet data, the dummy data are packetized and controlled so as to be transmitted toward the base station by a dummy data transmission control part 40a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a mobile radio communication device for transmitting data by packet communication via a base station device connectable to a public network.

[0002]

2. Description of the Related Art From a mobile radio communication device such as a mobile phone,
When transmitting packetized data to a base station,
As the procedure, as shown in FIG. 7, the mobile radio communication apparatus first notifies the base station that packet communication is to be performed, and makes a reservation.

[0003] On the other hand, when a permission notification is received from the base station and a communication link with the base station is established, the mobile radio communication apparatus transmits packetized data to the base station through the communication link. .

[0004] Once data is transmitted, a hold time for holding the line with the base station is given for a predetermined time, and a new hold time is calculated every time data is transmitted within this time, and a communication link is established. Is repeatedly held.

[0005] However, if data is not transmitted within the hold time, the communication link is disconnected by the base station. For this reason, when further data is to be transmitted after the communication link is disconnected, the above-described reservation procedure is started again for the base station, and it takes time to transmit even a small amount of data. There is a problem.

Further, when a new reservation is made as described above, permission is not always immediately obtained from the base station due to lack of resources or the like, and there is a problem that much time is required for data transmission.

[0007]

In the conventional mobile radio communication device, the communication link with the base station is disconnected due to the elapse of the hold time, and a large amount of time is required to continue data transmission. was there.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and it is possible to prevent a communication link with a base station from being disconnected due to an elapse of a hold time, to enable continuation of data communication, and to improve throughput. It is an object to provide a possible mobile radio communication device.

[0009]

In order to achieve the above object, a mobile radio communication device according to the present invention transmits data by packet communication via a base station device connectable to a public network. In the communication device, a timer means for measuring the passage of time, a dummy data storage means for storing preset dummy data, and a packet communication with the base station when the result of the time measurement by the timer means has reached a predetermined time. Dummy data transmitting means for transmitting dummy data stored in the dummy data storage means through a link.

[0010] In the mobile radio communication apparatus having the above-mentioned configuration, when the time measured by the time measuring means reaches a predetermined time, dummy data set in advance is transmitted through the packet communication link with the base station.

Therefore, according to the mobile radio communication apparatus having the above-described configuration, by setting the predetermined time within the communication link holding time of the base station, the dummy data is transmitted, and the communication with the base station due to the elapse of the holding time. Disconnection of the communication link can be prevented, data communication can be continued, and throughput can be improved.

Further, in the present invention, the dummy data stored in the dummy data storage means has error detection data used for error detection on the receiving side, and the dummy data is converted into error data on the receiving side by this data. The error detection data is set so as to be detected.

Therefore, according to the present invention, the receiving side does not apply any data processing to the dummy data, and does not put a load on the control unit of the communication partner station, and does not charge according to the number of packets. Even in such a communication network, the base station recognizes the error data, so that there is no possibility of unnecessary charges.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration of a mobile radio communication apparatus according to a first embodiment of the present invention, in which the communication system is CDMA (Code Division Mu).
A description will be given of an example of a communication device (mobile station) of the ltiple access) system.

First, a receiving system will be described. A radio frequency signal (hereinafter, referred to as a reception radio frequency signal) transmitted from a base station described later is received by an antenna 1 and then transmitted through an antenna duplexer (DUP) 2. Receiver circuit (RX)
3 is input.

In the receiving circuit 3, the reception radio frequency signal is mixed with the reception local oscillation signal output from the frequency synthesizer (SYN) 4 and frequency-converted into an intermediate frequency signal. Note that the frequency of the reception local oscillation signal generated from the frequency synthesizer 4 is specified by a control signal SYC output from the control unit 40.

The intermediate frequency signal is input to a CDMA signal processing unit 6. The CDMA signal processing unit 6 is controlled by the control unit 40, performs quadrature demodulation processing on the intermediate frequency signal, performs despreading processing using a PN code, and reproduces received data addressed to the own station.

The received data reproduced by the CDMA signal processing unit 6 is input to a data branching / combining unit 7, where the data is branched into control information and user information. Among them, the control information is input to the control unit 140. The user information is input to the audio data processing unit 8 when the content is voice communication, and is input to the control unit 40 when the content is data communication.

The control information includes data for identifying whether the user information is based on voice communication or data communication, in addition to the identification data of the transmission source and the data for identifying the destination. It is.

The user information branched by the data branching / synthesizing unit 7 during voice communication is subjected to a decompression process in a voice data processing unit 8 and converted into a digital reception signal.
It is decoded into an analog reception signal. The analog reception signal is amplified by an amplifier 9 and then amplified by a speaker 10.
More loudspeaker output.

On the other hand, at the time of data communication, the user information branched by the data branching / combining unit 7 is packet data, which is transmitted through the control unit 40 and the connector 20 and through the connector 50 connected to the connector. Via a personal computer, such as a PDA (Personal Digital Assistance) or a notebook personal computer.

Next, the transmission system will be described. During voice communication, a speaker's transmission signal input from the microphone 11 is amplified by the amplifier 12 and then input to the voice data processing unit 8, where the PCM encoding process is performed. Is performed and encoded into a digital transmission signal. Further, the digital transmission signal is subjected to a compression process and input to the data branching / combining unit 7.

In data communication, the portable computer P is connected via the connector 50 and the connector 20.
The packetized data input from C is input to the data branching / combining unit 7 through the control unit 40.

The data branching / synthesizing unit 7 uses data input from the voice data processing unit 8 as user information during voice communication, and packet data input from the portable computer PC through the control unit 40 during data communication. Is used as user information, and control information input from the control unit 40 is added to the user information to generate transmission data.

The control information input from the control unit 40 includes, in addition to the identification data of its own device and the identification data of the transmission destination, whether the user data included in the transmission data is based on voice communication, The data includes data for identifying whether the communication is performed.

The CDMA signal processing unit 6 uses the PN code specified by the control unit 40 to perform spreading processing on the transmission data, and then performs quadrature modulation processing to convert the transmission intermediate frequency signal. Generate.

These intermediate frequency signals are transmitted to a transmission circuit (T
X) In 5, the signal is mixed with the transmission local oscillation signal generated from the frequency synthesizer 4 and frequency-converted into a transmission radio frequency signal. This transmission frequency signal is input to the antenna 1 via the antenna duplexer 2, and transmitted from the antenna 1 to the base station.

The control unit 40 is, for example, a microcomputer as a main control unit. The control unit 40 controls and controls each unit, establishes a communication link with a base station, and performs control relating to voice communication and data communication using packet data. And a dummy data transmission control means 40a as a new control function.

When a predetermined time t1 has elapsed after the transmission of the packet data, the dummy data transmission control means 40a
This is for controlling dummy data stored in a storage unit 41 to be described later to be packetized and transmitted to the base station. The time t1 is set shorter than the hold time t0 during which the communication link with the base station is maintained.

The storage unit 41 uses a semiconductor memory such as a ROM or a RAM as a storage medium. The storage medium stores a control program of the control unit 40 and ID data of its own device necessary for authentication with a base station. In addition to having an area for storing various control data relating to the communication, dial data corresponding to abbreviated dialing, and setting data of various functions, a dummy data storage area 41a is provided.

The dummy data storage area 41a is an area for storing dummy data having no predetermined meaning. The dummy data has additional data used for error detection, and the additional data is set such that an error is detected from the user data body in the base station or the communication partner station. Have been.

The console unit (CU) 42 displays keys such as a dial key, a transmission key, an end key, a volume control key, and a mode designation key, and displays the telephone number of the communication partner terminal and the state of the terminal itself. LCD display, battery 3
It consists of an LED lamp indicating a 0 Discharge state (requesting charging of the battery 30). The clock unit 43 measures time using a crystal oscillator or the like, and has a timer function. This function is activated in response to an instruction from the control unit 40, and when the time t1 has elapsed, notifies the control unit 40 of the fact.

Reference numeral 31 denotes a power supply circuit. The power supply circuit 31 generates a predetermined operating power supply voltage Vcc based on the output of the battery 30 and supplies it to each unit. Next, with reference to FIG. 2, the operation of the mobile radio communication device having the above configuration will be described below. FIG. 2 is a flowchart for explaining data transmission control of the mobile radio communication device.

When a user makes a call by operating the console unit 42 or the like, the control unit 40
It is determined whether the communication is data communication or voice communication (step 2a). Here, in the case of voice communication, step 2
In step b, control relating to normal voice communication is performed.

On the other hand, in the case of data communication, step 2
Move to c. In step 2c, the dummy data transmission control means 40a resets and restarts the timer of the clock unit 43, and proceeds to step 2d.

In step 2d, the dummy data transmission control means 40a determines whether or not the elapse of the time t1 has been notified from the clock section 43. Here, if there is a notice,
Proceed to step 2h. If there is no notification, go to step 2h.
e.

In step 2e, the control unit 40 monitors whether or not the user has performed a communication termination operation. Here, when it is detected that the user has performed the end operation, the communication link with the base station is disconnected according to a predetermined procedure. On the other hand, if the above operation has not been performed, the process proceeds to step 2f.

In step 2f, the dummy data transmission control means 40a monitors whether packet data has been input from the portable computer PC. Here, if the input of the packet data is not detected, step 2d is performed again.
Then, it is determined whether or not the elapse of the time t1 has been notified from the clock unit 43. If the input of the packet data is detected, the process proceeds to step 2g and the control unit 40
Performs control for transmitting the packet data to the base station. Then, the process returns to step 2c, and the timer of the clock unit 43 is reset by the dummy data transmission control unit 40a.

On the other hand, in step 2h, the dummy data transmission control means 40a reads the dummy data from the dummy data storage area 41a and transmits the dummy data to the base station before the hold time t0 elapses. afterwards,
The process again proceeds to step 2c, and the timer of the clock unit 43 is reset by the dummy data transmission control unit 40a.

As described above, in the mobile radio communication device (mobile station) having the above configuration, as shown in FIG. 3, when the transmission of the packet data is delayed for a time t1 or more, the dummy data transmission control means 40a sets the dummy data The dummy data is read from the storage area 41a, and the dummy data is transmitted to the base station before the hold time t0 elapses.

Therefore, according to the mobile radio communication apparatus having the above-described configuration, disconnection of the communication link with the base station due to elapse of the hold time can be prevented, data communication can be continued, and throughput can be improved.

Further, the data transmitted by the mobile radio communication device for holding the communication link is meaningless dummy data, and is recognized as error data on the receiving side such as a base station or a communication partner station. It is set to be.

For this reason, the communication partner station does not apply any data processing to the dummy data, and does not impose a load on the control unit of the communication partner station, and is charged according to the number of packets. Even a simple communication network is recognized as error data by the base station, so that there is no possibility of unnecessary charges.

Next, a mobile radio communication device according to a second embodiment of the present invention will be described. FIG. 4 shows the configuration, similar to the first embodiment.
A description will be given by taking a communication device (mobile station) of the de Division Multiple Access) system as an example.

In the following description, the same components as those in the first embodiment will not be described again, and different portions will be mainly described. The control unit 44 includes, for example, a microcomputer as a main control unit, controls and controls each unit, establishes a communication link with a base station, and performs control related to voice communication and data communication using packet data. A dummy data transmission control means 44a is provided as a new control function.

The dummy data transmission control means 44a controls the packetization of dummy data stored in the storage unit 45, which will be described later, and transmission to the base station every predetermined time t2. The time t2 is set shorter than the hold time t0 during which the communication link with the base station is maintained.

The storage unit 45 uses a semiconductor memory such as a ROM or a RAM as a storage medium. The storage medium stores the control program of the control unit 44 and the ID data of its own device necessary for authentication with the base station. In addition to an area for storing various control data relating to the communication, dial data corresponding to abbreviated dialing, and setting data of various functions, a dummy data storage area 45a is provided. The data stored in the dummy data storage area 45a is the same as the dummy data stored in the dummy data storage area 41a. The clock unit 46 measures time using a crystal oscillator or the like, and has a timer function. This function notifies the control unit 44 to that effect every time t2.

Next, with reference to FIG. 5, the operation of the mobile radio communication device having the above configuration will be described below. FIG. 5 is a flowchart for explaining the operation of the mobile radio communication device. When a user makes a call by operating the console unit 42 or the like, the control unit 44 determines whether the communication is data communication or voice communication (step 5).
a). Here, in the case of voice communication, the process proceeds to step 5b, where control relating to normal voice communication is performed.

On the other hand, in the case of data communication, step 5
Move to c. In step 5c, the dummy data transmission control means 44a activates the clock unit 46, and proceeds to step 5d.

In step 5d, the dummy data transmission control means 44a determines whether or not the elapse of the time t2 has been notified from the clock section 46. Here, if there is a notice,
Proceed to step 5h. If there is no notification, go to step 5h.
e.

In step 5e, the control unit 44 monitors whether or not the user has performed a communication termination operation. Here, when it is detected that the user has performed the end operation, the communication link with the base station is disconnected according to a predetermined procedure. On the other hand, if the above operation has not been performed, the process proceeds to step 5f.

In step 5f, the dummy data transmission control means 44a monitors whether packet data has been input from the portable computer PC. Here, if the input of the packet data is not detected, step 5d is performed again.
Then, it is determined whether or not the elapse of the time t2 has been notified from the clock unit 46. If the input of the packet data is detected, the process proceeds to step 5g and the control unit 44
Performs control for transmitting the packet data to the base station. Then, the process returns to step 5d.

On the other hand, in step 5h, the dummy data transmission control means 44a reads the dummy data from the dummy data storage area 45a and transmits the dummy data to the base station before the hold time t0 elapses. afterwards,
The process returns to step 5d.

As described above, in the mobile radio communication apparatus (mobile station) having the above configuration, as shown in FIG. 6, every time the time t2 elapses (dummy data transmission control means) irrespective of packet data transmission. Before the hold time t0 elapses (44a), the dummy data is transmitted to the base station.

Therefore, according to the mobile radio communication apparatus having the above-described configuration, disconnection of the communication link with the base station due to elapse of the hold time can be prevented, data communication can be continued, and throughput can be improved. The same effects as in the first embodiment can be obtained.

The present invention is not limited to the above embodiment. For example, in the above-described embodiment, CDMA is used as an example of a communication method. However, any mobile wireless communication device that can perform packet communication can use TDMA (Time Divisio).
n Multiple Access) or FDMA (Frequency Divi
and the same effect can be obtained. It goes without saying that various modifications can be made without departing from the spirit of the present invention.

[0057]

As described above, according to the present invention, the timekeeping means, the dummy data storage means, and the dummy data transmitting means are newly provided, and when the timekeeping result of the timekeeping means reaches a predetermined time, The dummy data transmitting means transmits the dummy data stored in the dummy data storing means through a packet communication link with the base station.

Therefore, according to the present invention, the predetermined time is set within the communication link holding time of the base station, thereby preventing communication link disconnection with the base station due to the elapse of the holding time by transmitting dummy data. As a result, it is possible to provide a mobile radio communication device capable of continuing data communication and improving the throughput.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram showing a configuration of a first embodiment of a mobile radio communication device according to the present invention.

FIG. 2 is a flowchart for explaining data transmission control of the mobile wireless communication device shown in FIG. 1;

FIG. 3 is a diagram for explaining the timing of dummy data transmission of the mobile radio communication device shown in FIG. 1;

FIG. 4 is a circuit block diagram showing a configuration of a second embodiment of the mobile radio communication device according to the present invention.

FIG. 5 is a flowchart for explaining data transmission control of the mobile radio communication device shown in FIG. 4;

6 is a diagram for explaining the timing of dummy data transmission of the mobile radio communication device shown in FIG.

FIG. 7 is a diagram for explaining a problem in a conventional mobile radio communication device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 antenna 2 antenna duplexer (DUP) 3 reception circuit (RX) 4 frequency synthesizer (SYN) 5 transmission circuit (TX) 6 CDMA signal processing unit 7 data branching / combining unit 8 voice data processing Units 9 and 12 Amplifier 10 Speaker 11 Microphone 20 and 50 Connector 30 Battery 31 Power supply circuit 40 and 44 Control units 40a and 44a Dummy data transmission control means 41 and 45 Storage units 41a and 45a Dummy Data storage area 42 Console unit (CU) 43, 46 Clock section

Claims (4)

[Claims] 1. A mobile radio communication device for transmitting data by packet communication via a base station device connectable to a public network, a time measuring means for measuring the passage of time, and dummy data for storing preset dummy data. Storage means, and when a timed result of the timed means has reached a predetermined time,
A mobile radio communication apparatus comprising: a dummy data transmitting unit that transmits dummy data stored in the dummy data storage unit via a packet communication link with the base station. 2. The method according to claim 1, wherein the dummy data transmitting means transmits the predetermined dummy data via a packet communication link with the base station when a predetermined time has elapsed from the end of the previous packet data transmission. The mobile radio communication device according to claim 1, wherein: 3. The dummy data transmitting means according to claim 1, wherein the dummy data transmitting means transmits preset dummy data through a packet communication link with the base station every time a preset time elapses. Mobile radio communication device. 4. Dummy data stored in the dummy data storage means has error detection data used for error detection on a receiving side, and the dummy data is detected as error data on the receiving side by this data. The error detection data is set as described above.
The mobile radio communication device according to claim 3.