JPH0984117A - Slave set and master set for cordless telephone device and cordless telephone device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To save power consumption at the standby time of a slave set. SOLUTION: This cordless telephone device consisting of a master set connected to a telephone line and a slave set capable of communication by an information channel for directly executing communication with a control channel from the master set and another slave set. In the device, the slave set is provided with a control circuit 34 which shifts a mode to the monitor mode of the information channel after a signal requesting the start of a direct inter-slave set call is transmitted to the master set by the control channel or shifts the mode to the monitor mode of the information channel when the signal indicating the start of the direct inter-slave set call from the master set and the master set is provided with the control circuit which transmits the signal indicating the start of the direct inter-slave set call to the slave set based on the signal requesting the start of the direct inter-slave set call from the slave 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 which enables direct communication between handsets in a parent-child telephone.

[0002]

2. Description of the Related Art In recent years, a PHS (Personal Handy phone System) has been put into practical use as a simple mobile phone system.

The PHS is a TD for composing and composing a frame composed of four time slots each for uplink and downlink.
It uses the MA / TDD method. Each carrier secures 4 channels (a set of uplink and downlink time slots). As the channel, a control channel used for control such as call setting and an information channel used for communication are used properly. Since wireless communication is performed with relatively low power between the base station (master unit) and the slave unit, the range of the wireless area is about a few hundred meters in radius, but in addition to making external calls via the master unit, Direct calls between handsets that do not pass through are also possible (reference: "RCR STD-28" standard).

As described above, the slave unit capable of direct communication between the slave units intermittently monitors only the control channel constantly transmitted from the master unit (for monitoring the parent-child communication).
And a home transceiver mode (for monitoring a direct call between handset units) for scanning and monitoring information channels for 10 carriers in addition to monitoring the control channel. Then, the slave unit in the standby state periodically switches between these two modes to start a call between the master unit and a direct call between the slave units.

[0005]

However, according to the above-mentioned prior art, since the receiver unit in the standby mode operates the receiving circuit in both the standby mode and the home transceiver mode,
There is a problem that power consumption increases. In particular, this problem has been an important issue in a child device that uses a battery as a power source because the usage time is shortened.

[0006]

The present invention has been made in view of the above points, and a first feature thereof is to directly communicate with a control channel from a master unit connected to a telephone line or another slave unit. In a cordless telephone device handset capable of communicating on an information channel for transmission, a signal requesting the start of a direct telephone call between handset handsets is transmitted to the base unit on the control channel and then transitioned to the information channel monitoring mode. Alternatively, it is provided with a control circuit that shifts to the monitoring mode of the information channel when the signal instructing the start of the direct communication between the slave units is received from the master unit.

A second feature is that in a master unit of a cordless telephone device, which is connected to a telephone line and can communicate with each other through a control channel, a plurality of slave units that can communicate with each other through information channels. Is provided with a control circuit for transmitting a signal instructing the start of a direct call between handset units to the handset based on a signal requesting the start of a direct call between handset units. A cordless telephone device comprising a master unit connected to a telephone line and a slave unit capable of communicating through a control channel from the master unit or an information channel for directly communicating with another slave unit, When a signal requesting the start of a direct call between the handset units is transmitted to the device via the control channel and then transitioned to the monitoring mode of the information channel, or when a signal instructing the start of the direct call between the handset units is received from the base unit. Information channel monitoring mode And a control circuit for transmitting a signal instructing the slave unit to start a direct call between the slave units based on a signal from the slave unit requesting the start of the direct talk between the slave units. That is, a circuit is provided in the base unit.

[0008]

1 is a block diagram showing a schematic configuration of a cordless telephone device of the present invention. This cordless telephone device includes a master unit (1) and slave units a to c (2a to 2c).
Consists of

The master unit (1) is "RCR STD-28".
TD having a function conforming to the above and a function related to the present invention
It is a base station of MA / TDD system.

First, the outline of the functions of the parent device which conforms to the above will be described. The master unit is connected to a public network or a private extension network, and uses a control channel and an information channel for multiple slave units that are located in the wireless area of the master unit and are registered. Call control and communication with the machine. Here, the location registration refers to registration for placing the device under the control of the master device when the data indicating the presence is received from the slave device that has moved into the wireless area. The control channel is
It is a channel used for call control such as call origination and termination.
The information channel is a channel used for voice communication, data communication and the like. The base unit steadily performs intermittent transmission of information for synchronization on the control channel.
When an incoming call is received from an external line to a child device, the simultaneous incoming call data for notifying the called child device and the information channel to be transferred to the voice call is transmitted on the control channel, and then the child device is called on the information channel. Performs voice calls and other relays with outside lines.

Next, the function of the base unit (1) relating to the present invention will be described. The master unit (1) is a slave unit ac on the control channel.
When the extension request data is received from (2a to 2c), the extension request data is transmitted to the partner mobile device of the extension call.

Each of the slave units a to c (2a to 2c) is
In addition to the function based on "RCR STD-28", it has a function related to the present invention.

First, the outline of the functions of the slave unit which conforms to the above will be described. Each slave unit has a standby mode in which only the control channel constantly transmitted from the master unit is intermittently monitored, and a home transceiver mode in which in addition to monitoring the control channel, scanning and monitoring information channels for 10 carriers are also used. Have. This standby mode is also called a battery save mode because it intermittently receives only control information called a superframe and consumes much less power than the home transceiver mode. The slave unit normally operates in the standby mode, and when calling another slave unit directly, it operates in the home transceiver mode and can directly start the inter-slave unit call without going through the master unit.

Next, the functions of the slave units a to c (2a to 2c) related to the present invention will be described. Each child machine ac (2a-2
At the time of starting the extension call, c) can call another slave unit via the master unit (1) in addition to directly calling another slave unit in the home transceiver mode.
More specifically, when a direct call is started between the slaves whose location is registered in the wireless area of the master (1), in the standby mode, the direct call request between the slaves is transmitted to the master via the control channel. (1), then shifts to the home transceiver mode, receives the call data from the other party of the extension call, and then enters the direct call state between the handset units.

FIG. 2 is a block diagram showing the configuration of the master unit (1). As shown in the figure, the base unit (1) has an antenna (1
8), network circuit (3), incoming call detection circuit (4),
Speaker (5), amplifier (6), microphone (7), amplifier (8), receiving circuit (9), transmitting circuit (1
0), a switching circuit (11), a speaker (12), an input section (13), and a control circuit (17).

The network circuit (3) has a connection circuit for connecting an external line such as a public network or a private branch exchange network and a holding circuit, and a slave unit or an internal speaker (5) via a switching circuit (11). ) And a set of microphones (7).

The incoming call detection circuit (4) detects an incoming call from an outside line.

Speaker (5), microphone (7)
Are a hands-free speaker and a microphone connected to the switching circuit (11) via the amplifier (6) and the amplifier (8), respectively.

The receiving circuit (9) receives the control channel carrier and the information channel carrier input from the antenna (18) and demodulates the data on the carrier.

The transmission circuit (10) modulates the data input from the switching circuit (11) onto the control channel carrier and the information channel carrier and transmits the data from the antenna (18). The switching circuit (11) connects either the set of the reception circuit (9) and the transmission circuit (10) or the set of the amplifier (6) and the amplifier (8) to the network circuit (3).

The input unit (13) includes at least a hold button (14), a ten-key (15), and an extension button (16), and accepts a user's operation instruction.

The control circuit (17) is composed of a microprocessor and controls each circuit in order to realize the function as a master unit. For example, control information such as synchronization information for the slave unit is constantly generated and transmitted on the control channel via the transmitter circuit (10), and the receiver circuit (9) and the transmitter circuit (10) are transmitted to and from the slave unit. ), The call data on the information channel transmitted and received in the switching circuit (11), the network circuit (3)
It controls to relay to the outside line via. Further, the control circuit (17) receives the extension request data from the slave unit on the control channel received by the receiving circuit (9),
The extension request data is generated for the other party handset of the extension call indicated by the data, and is transmitted via the transmission circuit (10).

FIG. 3 is a block diagram showing the configuration of each of the slave units a to c (2a to 2c). As shown in the figure, slave units a to c
(2a to 2c) are an antenna (19) and a PLL unit (2
0), receiving circuit (21), speaker (22), amplifier (23), transmitting circuit (24), amplifier (25), microphone (26), codec (27), input section (2)
8), outside line button (29), extension line button (30), ten key (31), hold button (32), bell (33), control circuit (34), timing instruction section (34a), transmission / reception switching circuit (36). , A channel switching circuit (37).

The PLL section (20) generates a local oscillation frequency signal corresponding to either a control channel or an information channel for the receiving circuit (21) and the transmitting circuit (24).
This local oscillation frequency signal is supplied to the channel switching circuit (3
The frequency is determined by the setting of the channel designation parameter in 7).

The receiving circuit (21) receives the control channel or the information channel corresponding to the local oscillation frequency from the PLL section (20) and demodulates the data of the time slot of the timing designated by the transmission / reception switching circuit (36). To do.

The speaker (22) outputs the data inputted from the receiving circuit (21) through the codec (27) and the amplifier (23) as an audio signal.

The transmission circuit (24) receives the data from the control circuit (34) or the data from the codec (27) in the time slot data at the timing designated by the transmission / reception switching circuit (36) in the PLL section. (2
0) is modulated from the control channel or the information channel corresponding to the local oscillation frequency from 0) and transmitted via the antenna (19).

The microphone (26) inputs the user's voice to the codec (27) via the amplifier (25).

The codec (27) includes a receiving circuit (21).
The voice-compressed data obtained from the above is decoded, and the voice input from the microphone (26) through the amplifier (25) is subjected to voice compression coding.

The input section (28) includes at least an outside line button (29), an inside line button (30), a ten-key pad (31), and a hold button (32), and receives a user's operation instruction.

The bell (33) is for informing the incoming call.

The control circuit (34) is composed of a microprocessor and controls each circuit of the slave unit. For example, in the standby mode, the PLL circuit (20), the transmission / reception switching circuit (36), and the channel switching circuit so that the receiving circuit (21) receives the control channel only for 5 mS (TDMA frame time) every cycle of battery saving. (37) is controlled, and in the home transceiver mode, the receiving circuit (21) is configured to receive the control channel and the information channel sequentially.
The L section (20), the transmission / reception switching circuit (36), and the channel switching circuit (37) are controlled. In the communication with the master unit or another slave unit, the receiving circuit (21) and the transmitting circuit (24)
Controls to transmit and receive data of the codec (27) on the information channel. In the direct call between the handset units, the receiving circuit (21) and the transmitting circuit (24) are controlled to transmit and receive the data of the codec 27 on the information channel, and
The receiving circuit (21) controls to receive the control channel for 5 ms for each battery save cycle.

The timing instructing section (34a) outputs a timing signal indicating a battery saving cycle in a direct call between the handset units. The battery save cycle is about 1 second in this embodiment.

The transmission / reception switching circuit (36) includes a master unit (1).
Alternatively, at the timing of the reception time slot and the transmission time slot in the TDMA frame in the communication with another child device, the reception circuit (21) and the transmission circuit (24), respectively.
Turn on the action.

The channel switching circuit (37) changes the reception channel in the reception circuit (21) from the information channel to the control channel at every cycle indicated by the timing signal from the timing instruction section (34a) during the direct communication between the handset units. Switch. Specifically, for each cycle of the timing signal, P
The parameter setting corresponding to the control channel is performed for the LL unit (20), and the parameter setting corresponding to the information channel is performed after 5 mS.

The cordless telephone apparatus according to the embodiment of the present invention having the above-described configuration will be described separately for the operation of the cordless telephone apparatus during the standby state and the shift to the direct call between the handset units. Operation while waiting.

It is assumed that the slave units a to c are registered in the master unit and are in positions where they can communicate with each other. Each slave unit is in a standby mode for receiving intermittently in synchronization with the superframe on the control channel from the master unit (FIG. 5).

During this standby, the home transceiver mode does not operate, and only the standby mode operates. Therefore, the power consumption of the receiving circuit is remarkably low. Transition operation to direct call between handset units (between handset a and b).

FIG. 4 is a transmission / reception sequence diagram between the parent and child, which represents the transition to the direct call between the child devices.

In the figure, when a direct call is made between the handset units a and b, the extension button (30) on the handset unit a and a ten-key (31) indicating the handset unit b as the extension partner are set by the user. When pressed, the control circuit (34) causes the transmission circuit (2
The extension mode instruction data (A) for instructing the extension telephone call between the slaves a and b is transmitted via the control channel (4) (FIG. 6).

Upon receiving the extension mode instruction data (A), the parent device (1) transmits the inter-destination direct call instruction data (B) to the child device b on the control channel (FIG. 7).

Upon receiving the direct call instruction data (B) between the handset units, the handset unit b shifts to the direct call channel between handset units, and the call response data (C) is sent to the handset unit a at the same slot timing as the base unit. Is transmitted (FIG. 8).

As a result, the handset a and the handset b shift to a direct call between the handset units. After this transition, the child device a also receives the control channel from the parent device every battery saving cycle. As a result, an external line incoming via the master unit can be received while a direct call is made between the slave units. As described above, the call signal from the master unit is received in order to reduce power consumption during standby. Even if only the standby mode is operated, it is possible to start a direct call between the slave units via the master unit.

When the slave unit is located outside the wireless area of the master unit, it is impossible to communicate with the master unit and direct communication between the slave units cannot be made. It is only necessary to detect that is located outside the wireless area of the base unit and automatically make it stand by in the home transceiver mode.

[0045]

According to the cordless telephone of the present invention, during standby, only the standby mode for receiving the call signal from the base unit operates, and not the home transceiver mode for receiving the call signal of the slave unit. The power consumption of the receiving circuit is extremely low. In particular, in a cordless telephone using a battery as a power source, the usage time of the telephone is extended, and the effect is great.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a cordless telephone device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a master unit in the embodiment.

FIG. 3 is a block diagram showing a configuration of each slave unit in the embodiment.

FIG. 4 is a transmission / reception sequence diagram between the parent and child, which represents the start of the direct communication between the child devices in the embodiment.

FIG. 5 is an operation explanatory diagram of the embodiment.

FIG. 6 is an operation explanatory diagram of the embodiment.

FIG. 7 is an explanatory diagram of an operation in the embodiment.

FIG. 8 is an operation explanatory diagram of the embodiment.

[Explanation of symbols]

 1 Master 2a Slave a 2b Slave b 2c Slave c 4 Incoming detection circuit 9 Reception circuit 10 Transmission circuit 15 Numeric keypad 16 Extension button 17 Control circuit 21 Reception circuit 24 Transmission circuit 29 External line button 30 Extension button 31 Numeric keypad 34 Control circuit 34a Timing instruction unit 36 Transmission / reception switching circuit 37 Channel switching circuit

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kazuhiko Watanabe 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (3)

[Claims] 1. A cordless telephone device slave unit capable of communicating through a control channel from a master unit connected to a telephone line or an information channel for directly communicating with another slave unit, wherein When the signal requesting the start of the direct call between the handset units is transmitted on the control channel and then transitioned to the monitoring mode of the information channel, or when the signal instructing the start of the direct call between the handset units is received from the base unit, the information channel A cordless telephone device slave unit having a control circuit for shifting the monitoring mode to the monitoring mode. 2. A cordless telephone device, which is connected to a telephone line and can communicate with each other through information channels, and a cordless telephone device, which is capable of communicating through a control channel. A base unit for a cordless telephone device, comprising a control circuit for transmitting a signal for instructing the start of a direct call between handset units to the handset unit based on a signal requesting the start of a call. 3. A cordless telephone device comprising a master unit connected to a telephone line and a slave unit capable of communicating through a control channel from the master unit or an information channel for directly communicating with another slave unit. In addition, after transmitting a signal requesting the start of the direct call between the slaves to the master unit through the control channel, the mode is switched to the monitoring mode of the information channel, or the master unit instructs the start of the direct call between the slave units. When a signal is received, the slave unit is provided with a control circuit for shifting to the monitoring mode of the information channel, and based on the signal from the slave unit requesting the start of the direct talk between the slave units, the slave unit is set A cordless telephone device, wherein the base unit is provided with a control circuit for transmitting a signal instructing to start.