JPH04354445A - Digital cordless telephone set - Google Patents

Abstract

PURPOSE:To simply receive various services other than a talking service by using the digital cordless telephone set. CONSTITUTION:The communication between a master set and a slave set is implemented by transmission and reception of a digitized data. The slave set is provided with a storage section 24 for a prescribed program, an execution means 21 to execute the program stored in the storage section 24 and a load means 23 loading the program sent from the master set and storing it to the storage section 24. Through the constitution above, various services are received by the digital cordless telephone set.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital cordless telephone device for making telephone calls by transmitting and receiving digitized data.

0002

[Prior Art] A digital cordless telephone device that wirelessly transmits voice signals converted into digital data consists of a base unit (base station) that is connected to an exchange via a line, and a wireless slave unit (mobile station). , TDD and TDMA/TDD systems are generally used as wireless transmission/reception systems between these systems. In this case, the handset is configured so that it can also be used as a handset of a telepoint system called a personal communication network (PCN), personal handy phone (PHP), or the like.

[0003] Now, it has been considered to use the handset of this digital cordless telephone device to provide various services other than telephone calls. For example, it may be possible to receive various data and display the received data, or to enjoy a video game using a set game program.

0004

[Problem to be Solved by the Invention] By the way, in order to realize various services other than telephone calls, it is necessary to set an application program that operates in accordance with the corresponding handset. Application programs are stored in a ROM cartridge or the like, and by replacing the ROM cartridge, it is possible to support a plurality of different types of services. For example, by installing a ROM cartridge in which a video game program as an application program is stored in a child device, the child device can enjoy a compatible video game. By replacing this ROM cartridge with one that stores a program for another video game, the user can enjoy another video game.

[0005] However, if application programs are provided in a memory device such as a ROM cartridge in this way, a ROM cartridge or the like corresponding to the service that the slave device is to receive must be prepared in advance. If there are many types of services to be offered, it is necessary to prepare a large number of ROM cartridges, which is particularly troublesome and inconvenient when taken outdoors to be used as a slave device for a telepoint system.

[0006] An object of the present invention is to make it possible to easily receive various services other than telephone calls using a digital cordless telephone device.

[0007]

[Means for Solving the Problems] The present invention provides a digital cordless telephone device that performs communication between a base unit and a handset by transmitting and receiving digitized data. , a storage unit 24 for a predetermined program, an execution unit 21 for executing the program stored in the storage unit 24, and a loading unit 23 for loading the program transmitted from the parent device and storing it in the storage unit 24. It is something that

[0008]

[Operation] By doing this, by having the parent unit send an application program, the transmitted application program is loaded on the slave unit and stored in the corresponding storage unit, and the transmitted application program is You will be able to receive the services you have followed.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the digital cordless telephone device of the present invention will be described below with reference to the accompanying drawings.

In this example, it is applied to a TDMA/TDD type digital cordless telephone device.
In an A/TDD type digital cordless telephone device, communication between a base unit and a handset or between each handset is performed as shown in FIG. That is, one frame is composed of a plurality of, for example, four, transmission slots T1 to T4 and the same number of reception slots R1 to R4, and slots T1 and R1
, T2 and R2, T3 and R3, and T4 and R4 are used in pairs to perform transmission and reception. In this case, in the case of a digital cordless telephone device, since the signals transmitted and received are digital data, it is easy to compress and expand the voice, and the time division multiplexing shown in FIG. 4 can be easily realized.

[0011] This TDMA/TDD transmission/reception system is characterized in that transmission and reception are carried out temporally separated in the transmission slot and the reception slot, so that the transmission frequency and the reception frequency can be the same frequency. This allows high efficiency in the use of each transmission channel, allowing multiple sets of cordless telephones to use the same frequency, and allowing many cordless telephones to make calls at the same time.

For example, as shown in FIG. 5, for one base unit BS connected to the telephone line L, a plurality of slave units MS1,
You can make calls on both MS2s at the same time. That is, for example, using slots T1 and R1, the base unit BS and the slave unit MS1
At the same time, communication a can be performed between the base unit BS and the slave unit MS2 using slots T2 and R2.

Next, FIG. 1 shows a handset constituting the digital cordless telephone device of this example. In the figure, 1 indicates an antenna, and 2
is a wireless transmitter/receiver section, 3 is a modulation/demodulation section, and 4 is a TDMA/TDD
A control section 5 is a voice encoding/decoding section, 6 is a microphone device as a receiver, and 7 is a speaker as a receiver, and the operation of each of these circuits is controlled by a system controller 20. That is, a signal in a predetermined frequency band received by the wireless transmitter/receiver 2 via the antenna 1 is digitally demodulated by the modulator/demodulator 3, and the signal of the required reception slot in the demodulated signal is sent to the TDMA/TDD controller 4. Extract. and,
The extracted signal is converted into an analog audio signal by the audio encoding/decoding unit 5, and the converted analog audio signal is output from the speaker 7. Further, the voice picked up by the microphone device 6 is converted into a digital voice signal by the voice encoding/decoding unit 5, and the converted digital voice signal is converted into a TDMA signal.
/TDD control unit 4 sets it as a signal of a predetermined transmission slot. Then, the signal of this transmission slot is digitally modulated by the modulation/demodulation section 3, the modulated signal is made into a signal of a predetermined frequency band by the radio transceiver section 2, and the signal of this frequency band is transmitted from the antenna 1.

The system controller 20 also includes a key input unit 8 for inputting dial numbers and operating games to be described later, and a liquid crystal display for displaying dial numbers, received data, game progress status, etc. in characters and graphics. The unit 9 is connected to a changeover switch 10 for switching between talking and playing a game.

Here, the configuration of the system controller 20 is shown in FIG. 2. The system controller 20 includes a central control unit (CPU) 21 having a microcomputer configuration, and a T
A serial interface 22 for sending control commands to the DMA/TDD control unit 4, a control ROM 23 in which programs for communication control and programs for loading received data are stored in advance, and application programs such as game programs are stored. A RAM 24 for application programs, a work RAM 25 used during data processing, and an interface 26 for sending control commands to the wireless transmitter/receiver 2 and modulator/demodulator 3 are provided. In this case, the CPU 21 and each of the circuits 22 to 26 are connected by a bus line 27, and the application program RAM 24 is connected to a backup battery 28 to prevent storage data from being lost. Further, a key input section 8, a liquid crystal display section 9, and a changeover switch 10 are directly connected to the CPU 21 via this bus line 27.

FIG. 3 shows the data storage state of the control ROM 23.A line connection control program is stored from the first address 0H, a man-machine interface program is stored from the subsequent address A program for loading received data is stored from address YH. This received data loading program is a process that, when data related to an application program is received from the base device side, performs error detection and correction on this received data, and stores the correctly received data in the application program RAM 24. It is set to do this.

When making a call from this handset, first set the changeover switch 10 to the calling side, and then select the other party (other handset, parent) by operating a predetermined key on the key input section 8. (external telephone). When the command from this key operation reaches the CPU 21, the CPU 21
performs an operation of calling the other party according to a program stored in the communication control ROM 23. At this time, a control channel different from the communication channel for transmitting and receiving audio data is used to communicate with the base unit. Also, at this time, the dial number of the other party (in the case of an outside line call) and the extension number (in the case of a call between handsets) are displayed on the liquid crystal display section 9.

[0018] When the other party is called, a predetermined slot in the communication channel designated by the control channel is used to transmit and receive voice, and a voice conversation is performed. Transmission and reception of audio data using the communication channel at this time is performed in the slot having the configuration shown in FIG. 6A. That is, each transmission slot and each reception slot shown in FIG.
As shown in A, a voice signal consisting of a preamble, a sync word, a control bit, voice data, and a correction code (CRC) is digitized as voice data and is transmitted to make a call. .

In this example, a game program or the like can be executed using a program stored in the application program RAM 24 of the handset of the digital cordless telephone device. First, we will explain the case of downloading this application program to be stored in the RAM 24.
The overall system in this case is shown in FIG. In FIG. 5, it is assumed that the main unit BS is a base station of a telepoint system, and that each slave unit (terminal station) MS1, MS2, etc. is used outdoors within about 100 m from this base station. In this case, the base unit BS is connected to a wired telephone line L, and is also connected to a master ROM device BS'. This master ROM device BS' stores various application programs that can be used in digital cordless telephone devices connectable to this telepoint system.

[0020] Then, when there is a request to transmit an application program from any slave unit in the vicinity of this base station BS, the corresponding application program stored in the master ROM device BS' is sent to the corresponding slave unit. Send. At this time, as shown in FIG. 6B, a block number and program data are assigned as transmission slots from the base station BS instead of audio data, and a set of application programs is divided and transmitted for each slot. Ru.

[0021] Then, each time the slave unit receives the application program data for each slot, it performs error detection and correction according to the received data loading program stored in the control ROM 23, and the correction process ensures accurate data. The base station BS sends information on whether or not the information has been obtained to the base station BS side. At this time, as shown in FIG. 6C, the transmission slot from the handset is assigned a block number and acknowledgment (ACK) information or negative acknowledgment (NAK) information instead of audio data.

[0022] Then, on the base station BS side, when an affirmative response indicating that accurate reception was achieved is returned, the data of the program to be transmitted sequentially is advanced, and a negative response indicating that accurate reception was not achieved is sent back. When it is returned, it repeats the transmission of data in the same slot until an acknowledgment is returned.

Here, an example of transmission of this application program is shown in FIG. 7. For example, the application program requested by the handset has a data length that can be transmitted in three slots, and this set of programs is divided into blocks 1, 2, Assume that it is divided into three blocks and can be transmitted in three slots. At this time, the base station BS first transmits data of block 1 in a predetermined transmission slot. When the handset receives the slot containing the data of block 1, it determines whether or not there is an uncorrectable error in the received data, and it is assumed that it determines that there is no uncorrectable error. If this determination is made, acknowledgment (ACK) information is transmitted in the next transmission slot from the handset. When the base station BS side receives this acknowledgment information, it transmits the data of block 2 in the next transmission slot to this slave device. At this time as well, it is assumed that the slave device determines whether or not there is an error that cannot be corrected in the received data of block 2, and here it is determined that there is an error that cannot be corrected. If this determination is made, negative acknowledgment (NAK) information is transmitted in the next transmission slot from the handset. When the base station BS side receives this negative response information, it transmits the data of block 2 again in the next transmission slot to this slave device. In this way, the program data is sent repeatedly until accurate reception is confirmed by acknowledgment information, and when block 3 can be accurately transmitted and loaded on the slave device, the program data transmission ends. do. Note that the data received by the slave device is temporarily stored in the work RAM 25 and error processing is performed.

[0024] Then, the data of the application program received by the handset in this way is stored in the control ROM 2.
3, the received data is transferred from the work RAM 25 to the application program RAM 24, the received application program is stored in the RAM 24, and the downloading work is completed.

[0025] When an application program is stored in the application program RAM 24 in this manner, the service provided by this application program can be received by this slave device. For example, if the received application program is a video game program, the game can be executed. That is, when executing a game program stored in the application program RAM 24 of the system controller 20, the changeover switch 10 is switched to the game side, and the game program is started by operating a predetermined key on the key input section 8. Instruct. By doing this, the CPU 21 can use R for the application program.
The game program stored in the AM 24 is read out, and the game content according to this program is displayed on the liquid crystal display section 9 under the control of the CPU 21. Thereafter, by sequentially operating the game execution keys in the key input unit 8 as the game progresses, the CPU 21 sequentially advances the processing of the game program, and the corresponding display is displayed on the liquid crystal display unit 9.

[0026] In this way, the program downloaded from the base station can be executed. For this reason,
It is not necessary for each handset to store an application program in advance, and the configuration of a digital cordless telephone device that can receive various services can be simplified. There is no need to prepare different types, and there is no need to carry a ROM cartridge or the like when carrying (when using outdoors).

Note that an application program other than the video game program may be downloaded and then executed. For example, by downloading a program that displays various data received by the handset on the liquid crystal display section 9, it becomes possible to deal with changes in the type of received data.

[0028]

[Effects of the Invention] According to the present invention, the application program transmitted from the base unit is loaded on the slave unit and stored in the corresponding storage unit, and the application program can be transmitted even if the application program is not prepared in advance on the slave unit. It becomes possible to receive various services according to the application programs provided.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing a slave device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram showing a system controller of a slave unit according to an embodiment.

FIG. 3 is a configuration diagram showing a data storage state of a control ROM according to an embodiment.

FIG. 4 is a timing diagram showing communication states according to one embodiment.

FIG. 5 is a configuration diagram showing an example of a system of a cordless telephone device.

FIG. 6 is a configuration diagram showing slots during communication according to an embodiment.

FIG. 7 is a timing diagram showing a communication state during downloading according to an embodiment.

[Explanation of symbols]

1 Antenna 2 Wireless transmitter/receiver section 3 Modulation/demodulation section 4 TDMA/TDD control section 5 Audio encoding/decoding unit 6. Microphone device 7 Speaker 8 Key input section 9. Liquid crystal display section 10 Changeover switch 20 System controller 21 Central control unit (CPU) 23 Control ROM

Claims (1)

[Claims] Claim 1. A digital cordless telephone device that performs communication between a base unit and a handset by transmitting and receiving digitized data, wherein the handset includes a storage unit for a predetermined program, and a program stored in the storage unit. 1. A digital cordless telephone device, comprising: an execution means for executing a program transmitted from the base unit; and a loading means for loading a program transmitted from the base unit and storing it in the storage unit.