JP3133513B2 - Digital cordless telephone handset - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is, apart from the general public telephone line, communicates with a plurality of telephones by wireless communication is possible, so-called second-generation child of the cordless telephone called digital cordless telephone apparatus About the machine .

[0002]

2. Description of the Related Art A digital cordless telephone apparatus has a function of making a telephone call by connecting to a public base station outdoors in addition to a home or business office with one terminal.
In addition, the use of digital features for confidential functions and data communication is expected to be promising. In addition, a mechanism for sending control information and data even during a call has been established, and future development is expected to grow further Have been.

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 the cordless telephone device will be described together with its operation. First, on the receiving side, a high-frequency signal input from an antenna is frequency-converted by an RF / IF unit 1 and demodulated by a demodulator 2 to demodulate π / 4-shifted 4-phase QPSK. Subsequently, the TDMA processing circuit 3 performs TDMA processing. After this processing, D for the audio signal portion
The D / A conversion of ADPCM / PCM is performed by the / A conversion circuit 4, and the audio processing circuit 5 performs a process such as a filter and an amplification. Also,
TDMA for control data such as messages
It is extracted from the processing circuit 3 and stored in the storage device 13.
Then, the microcomputer 6 processes communication data with the master unit and the base station based on the stored data.

On the transmission side, an audio signal from a microphone emitted from a user is subjected to processing such as amplification in an audio processing circuit 5 and then processed by an A / D conversion circuit 7.
It is converted into a digital signal of DPCM / PCM. The control data is output from the microcomputer 6. These voices and control data further include T
After being subjected to TDMA processing by the DMA processing circuit 3, the modulator 8 performs π / 4 shift four-phase QPSK modulation, and then receives processing such as frequency conversion and amplification in the RF / IF unit 9, and receives radio waves from the antenna. Fired as

[0005] In the PLL synthesizer section 10, the tuning frequency in the RF / IF section 1 in the receiving system and the tuning frequency in the RF / IF section 9 in the transmitting system are determined by an instruction from the microcomputer 6.
In addition, the display unit 11 responds to an instruction from the microcomputer 6 and
The key unit 12 monitors keys and notifies the microcomputer 6 of key input information.

[0006]

By the way, in order for a handset of a digital cordless telephone apparatus to receive a call outdoors, it is necessary to register its current position in a base station. Such position registration is performed in units of the call area in order to call a mobile device, which is a mobile device, and the position information is stored in a home memory. Therefore, when an incoming call is received, the contents of the home memory are read out, a call is made in the area based on the location information, and after confirming the response of the slave unit, the selection of the wireless zone and the selection of the empty channel are performed.
Further, the connection to the telephone line is made by the procedure of setting a call channel and calling.

There are two methods of location registration: a method in which the user operates a key and a method in which the key operation is automatically performed on a regular basis. However, the latter has a disadvantage that power consumption during standby increases. The present invention has been made to solve the above drawbacks, and an object thereof is to provide a handset of a digital cordless telephone apparatus can be made smooth automatic location registration of the mobile device without increasing power consumption .

[0008]

To achieve the above object of the Invention The present invention provides a handset conversation and transmission and reception of control data can der Lud I digital cordless telephone apparatus by radio communication with the base Chikyoku, a received data storage means for storing a frame structure on the control channel, is currently discontinuous reception
Control and frame structure recognition means for recognizing a frame structure on your channel frame stored the recognized frame structure
Determining means for determining whether the frame structure is different,
If the recognized frame structure is different from the stored frame structure, the base station of the recognized frame structure
It is characterized in that a position置登Rokute stage of performing position registration for.

[0009]

According to the above configuration, in the handset of a digital cordless telephone apparatus, the received data storage means stores the received control <br/> frame structure on your channel. The frame structure recognition means, now recognizes the frame structure on the control channel is intermittently received.

Therefore, the frame structure recognized by the determination means is recognized.
The structure registration and the previously stored frame structure are compared and determined . If the two are different, the position registration means recognizes the recognized frame structure.
The location registration is performed for the base station having the frame structure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 2 is a flowchart showing an outline of processing performed in the slave unit of the digital cordless telephone device according to the present invention. As shown in the figure, the contents of the processing of this flowchart include initialization processing including initialization and radio channel information processing, idle processing including reception information processing and examination of a link request, and link processing including SCCH transmission / reception processing and TCH activation processing. Service establishment processing including channel establishment processing, channel connection processing, examination of incoming and outgoing calls and processing of incoming and outgoing calls, communication processing from call setting and examination of various requests, other release processing, location registration processing, communication channel switching processing 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 specific description of the flow is omitted. All these processes are performed under the control of the microcomputer 6 in the circuit configuration shown in FIG.

FIG. 3 is a flowchart showing the outline of the process of automatic location registration of the slave unit of the digital cordless telephone device according to the present invention. After turning on the power, first, hardware such as a PLL frequency synthesizer (see FIG. 1) is initialized (step 1). Next, control data and control channel information are received, the frame structure on the control channel is recognized, and the received data is stored in a memory (RAM). A control channel reception process is performed (step 2). 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).

Incidentally, since each master unit (or base station) has a unique frame structure, the frame structure naturally changes when it enters the area of another master unit (or base station) due to movement or the like. Therefore, when it is recognized that the frame structure has changed in the intermittent reception, or when the intermittent reception fails (Yes in Step 5)
Returns to step 2 again. If the frame structure of the intermittent reception has not changed (N in step 5).
In the case of o), it waits for a link instruction (step 6).
If there is no link instruction (No in Step 6), the process proceeds to the next Step 14. Steps 4, 5, 6, and 14 (described later)
Is called an idle, and it goes around this loop during standby.

On the other hand, if there is a link instruction (Yes in step 6), then a link channel establishment process is performed (step 7), and a service channel establishment process is further performed (step 8). By both Steps 7 and 8, a service channel is established between the parent device (or base station) and the child device,
Information can be exchanged and various services can be received.

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 disconnected (steps 16 and 1).
7), returning 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 the call is a call (step 10), and if the call is a call (Yes in step 10). In this case, the calling process is performed with the master unit (or base station) (step 1).
1) Then, a call process is performed (step 12). Also,
If it is not an outgoing call (No in step 10), on the contrary, the incoming call processing is performed (step 13), and the call processing is continued (step 12). Step 1
Since the operation after the second is shown in FIG. 2, its explanation is omitted.

In step 14, the structure of the frame currently intermittently received 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 again in the storage device, and the registration process of the current position of the slave unit is performed (step 15). It should be noted that the above-mentioned steps 9 to 1
In the case where the processing shifts to step 5, the cause is that the user has pressed the key for instructing the position registration processing. However, in the case where the processing shifts from step 14 to step 15, the frame structure has changed. Is a factor, and location registration is automatically performed.

[0018]

According to the present invention described above, when using the slave unit outdoors, the location registration can be automatically and smoothly performed without increasing the current consumption. It is possible to eliminate an unexpected accident that a call cannot be received due to forgetting to register a location. Therefore, the telephone can be called without always worrying about the current position of the slave unit, so that the usability of the digital cordless telephone device is greatly improved.

[Brief description of the 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 a process performed in a slave unit of the digital cordless telephone device according to the present invention.

FIG. 3 is a flowchart showing an outline of an automatic location registration process of a slave unit of the digital cordless telephone device according to the present invention.

Claims (1)

(57) [Claims] 1. A Oite the handset conversation and transmission and reception of control data can der Lud I digital cordless telephone apparatus by radio communication with the base Chikyoku, received data storage means for storing a frame structure on the control channel When a frame structure recognition means for recognizing a frame structure on intermittent reception is the control channel currently recognized frame structure stored frame structure with different
Determining means for determining whether or not the frame structure is different from the stored frame structure when the recognized frame structure is different from the stored frame structure.
Handset of a digital cordless telephone apparatus is characterized in that a position置登Rokute stage of performing position registration for.