JPH06112894A - Digital cordless telephone set - Google Patents

Abstract

PURPOSE:To improve the convenience of use by providing a reception data storage means and a frame structure recognition means with the telephone set and registering preferentially the position of a slave set when the recognized frame structure differs from the stored frame structure. CONSTITUTION:All control is implemented by a microcomputer 6 and at first a PLL frequency synthesizer 10 or the like is initialized. Then control data and control channel information are received, the frame structure on a control channel is recognized and stored in a storage device 13. Since each master station has a proper frame structure, the frame structure is naturally changed when the mobile set enters a zone of other master set by movement or the like. When the change in the frame structure is recognized in the intermittent reception, whether or not the cause comes from position registration is checked. When the cause results from the position registration, the processing of the position registration is implemented, when the processing is finished, the service channel and the link channel are succeedingly cut off and an idle state is 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 called a so-called second-generation cordless telephone, which can communicate with a plurality of telephones by wireless communication in addition to a general public telephone line.

[0002]

2. Description of the Related Art A digital cordless telephone device has a function of making a call by connecting to a public base station in addition to a home or an office with a single terminal.
In addition, it is promising to be used for confidential communication functions and data communication, which take advantage of the characteristics of being digital, and a mechanism for sending control information and data even during a call is established, and further development is expected in the future. Has been done.

FIG. 1 is a block diagram showing a general circuit configuration of a slave unit of a digital cordless telephone device. Hereinafter, the configuration of this cordless telephone device will be described together with its operation. First, on the receiving side, the high frequency signal input from the antenna is frequency-converted by the RF / IF unit 1, and the demodulator 2 demodulates π / 4 shift four-phase QPSK. Then, the TDMA processing circuit 3 performs TDMA processing. After this processing, D
The A / A conversion circuit 4 performs ADPCM / PCM D / A conversion, and the audio processing circuit 5 performs processing such as filtering and amplification to produce audio through a speaker. Also,
For control data such as messages, TDMA
It is extracted from the processing circuit 3 and stored in the storage device 13.
Then, the microcomputer 6 processes the communication data with the master unit and the base station based on the stored data.

On the other hand, on the transmitting side, the voice signal from the microphone emitted from the user is subjected to processing such as amplification by the voice processing circuit 5 and then A / D conversion circuit 7
It is converted into a DPCM / PCM digital signal. The control data is output from the microcomputer 6. Then, these voice and control data are
After being subjected to TDMA processing by the DMA processing circuit 3, it is subjected to π / 4 shift four-phase QPSK modulation by the modulator 8 and subsequently undergoes processing such as frequency conversion and amplification by the RF / IF section 9 to receive radio waves from the antenna. Is fired.

In the PLL synthesizer unit 10, the tuning frequency in the RF / IF unit 1 of the receiving system and the RF / IF unit 9 of the transmitting system is determined by the instruction of the microcomputer 6.
In addition, the display unit 11 follows the instruction from the microcomputer 6,
The key unit 12 displays the LED and LCD, monitors the keys, and notifies the microcomputer 6 of the key input information.

[0006]

By the way, in order for the slave unit of the digital cordless telephone system to receive an incoming call outdoors, it is necessary to register its current position in the base station. Such position registration is performed in units of the calling area in order to call a mobile device which is a mobile device, and the position information is stored in the home memory. Therefore, when receiving a call, the contents of the home memory are read out, the area is called based on the position information, the response of the handset is confirmed, and then the wireless zone and the empty channel are selected.
In addition, the call channel is set and the call is connected to the telephone line.

There are two methods for registering the position: a method in which the user operates a key, and a method in which the operation is automatically performed on a regular basis. In the former case, when the user forgets to operate the key, a call is received. However, the latter has a drawback that the power consumption during standby increases. The present invention has been made to solve the above drawbacks, and an object of the present invention is to provide a digital cordless telephone device capable of smoothly performing automatic position registration of a handset without increasing power consumption.

[0008]

In order to achieve the above object, the present invention provides a digital cordless system having a slave unit capable of transmitting and receiving conversation and control data by wireless communication with a home master unit and a base station. In the telephone device, received data storage means for storing the received control data and the frame structure on the control channel, frame structure recognition means for recognizing the received frame structure on the control channel,
When the recognized frame structure is different from the stored frame structure, a priority position registration instruction means for instructing priority registration of the position of the child device is provided.

[0009]

With the above arrangement, in the digital cordless telephone device, the received data storage means stores the received control data and the frame structure on the control channel.
Further, the frame structure recognition means recognizes the frame structure on the received control channel.

Therefore, the priority position registration instructing means compares the recognized frame structure with the previously stored frame structure, and if the two are different, preferentially performs the position registration of the slave unit. Instruct.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a flow chart showing an outline of the processing performed in the child device of the digital cordless telephone device according to the present invention. As shown in the figure, the contents of the processing of this flow chart include initialization processing including initialization and radio channel information processing, idle processing including reception information processing and link request examination, and link including SCCH transmission / reception processing and TCH activation processing. Channel establishment processing, service connection establishment processing consisting of channel connection processing and outgoing / incoming call processing and incoming / outgoing call function processing, communication processing based on examination of call settings and various requests, other release processing, location registration processing, communication channel switching processing Equipped with processing. However, SCCH is an individual cell channel and TCH is an information channel. Since the outline of these processes is a well-known technique, a detailed description of the flow will be omitted. Further, all these processes are performed under the control of the microcomputer 6 in the circuit configuration shown in FIG.

FIG. 3 is a flow chart showing the outline of the processing for automatic location registration of the child device of the digital cordless telephone device according to the present invention. After the power is turned on, first, the hardware such as the PLL frequency synthesizer (see FIG. 1) is initialized (step 1). Next, the control data and the control channel information are received, the frame structure on the control channel is recognized, and the received data is stored in the memory (RAM). Control channel reception processing is performed (step 2). Then, if the reception of the control channel information and the recognition of the frame structure have failed (No in step 3), the process returns to step 2. If the frame structure can be recognized (Yes in step 3), the intermittent reception process is performed according to the recognized frame structure (step 4).

By the way, each master unit (or base station) has a unique frame structure, and therefore, when entering the range of another master unit (or base station) due to movement or the like, the frame structure naturally changes. Therefore, when it is recognized that the frame structure has changed in discontinuous reception, or when discontinuous reception fails (Yes in step 5)
To return to step 2 again. If the frame structure of the intermittently received frame has not changed (N in step 5)
If it is o), wait for a link instruction (step 6).
Then, if there is no link instruction (No in step 6), the process proceeds to the next step 14. Note that steps 4, 5, 6 and step 14 (described later)
The loop constructed by is called idle, and it goes around this loop during standby.

On the other hand, when the link is instructed (Yes in step 6), the link channel establishing process is performed (step 7), and the service channel establishing process is further performed (step 8). Through both steps 7 and 8, a service channel is established between the master unit (or base station) and the slave unit,
It becomes possible to exchange information and receive various services.

Next, it is checked whether or not the cause of the link instruction is location registration (step 9). If the cause is location registration (Yes in step 9), location registration processing is performed. (Step 15). When the location registration process is completed, the service channel and the link channel are subsequently disconnected (steps 16 and 1).
7) Then, the process returns to step 4 again to enter the idle state.

If the cause of the link instruction is not location registration (No in step 9), it is checked whether or not a call is made (step 10), and if a call is made (Yes in step 10). In the case), the call is processed with the master unit (or the base station) (step 1
1), followed by a call process (step 12). Also,
When the call is not made (No in step 10), the incoming call process is performed (step 13), and the subsequent call process is performed (step 12). In addition, step 1
Since the operations after the step 2 are shown in FIG. 2, the description thereof is omitted.

Further, in step 14, the structure of the currently intermittently received frame is compared with the frame structure stored in the storage device (see FIG. 1), and if they are different (Yes in step 14). In Case of,
The frame structure currently intermittently received is stored in the storage device again, and the current position of the slave is registered (step 15). In addition, step 9 to step 1 described above
When the process shifts to step 5, it is because the user has pressed the key for instructing the position registration process, but when the process shifts from step 14 to step 15, the frame structure has changed. As a result, the location is automatically registered.

[0018]

As described above, according to the present invention, when the child device is used outdoors, its location can be registered automatically and smoothly without increasing the current consumption. It is possible to eliminate the unexpected accident that you cannot receive an incoming call because you have forgotten to register your location. Therefore, since it is possible to make a call without having to worry about the current position of the child device, the usability of the digital cordless telephone device is greatly improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a general circuit configuration of a slave unit of a digital cordless telephone device.

FIG. 2 is a flowchart showing an outline of processing performed in a child device of the digital cordless telephone device according to the present invention.

FIG. 3 is a flow chart showing an outline of automatic position registration processing of a child device of the digital cordless telephone device according to the present invention.

Claims (1)

[Claims] 1. In a digital cordless telephone device having a handset capable of conversation and control data transmission / reception by wireless communication with a home base unit and a base station for home use, the received control data and the frame structure on the control channel are Received data storage means for storing, frame structure recognition means for recognizing the received frame structure on the control channel, and position registration of the slave unit when the recognized frame structure is different from the stored frame structure. A digital cordless telephone device, comprising: priority position registration instructing means for instructing to perform priority.