JP2947312B2 - Cordless telephone - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone, and more particularly, to a cordless telephone capable of shortening an incoming call response time of a slave unit performing intermittent reception in the cordless telephone.

[0002]

2. Description of the Related Art A conventional cordless telephone is disclosed in
As disclosed in Japanese Unexamined Patent Publication No. 2-248323, when the telephone is not used, the sub-unit is set to the intermittent reception state in order to suppress consumption of the power supply battery of the sub-unit.

If power is continuously supplied to the slave unit and the slave unit is always kept in the standby state even during the period when the telephone is not used, the life of the power supply battery of the slave unit is shortened. During the period in which the telephone is not used by performing intermittent reception, the power of the slave unit is turned on / off at a predetermined repetition cycle to suppress the power consumption of the slave unit and extend the life of the power supply battery of the slave unit.

FIG. 7 is a timing chart showing the operation of a conventional cordless telephone at the time of an incoming call. In FIG. 7, when there is an incoming call at time t0, (c) in FIG.
As shown in (1), the parent device transmits a header 51 having a length of 650 msec to the child device.

[0005] The header 51 having a length of 650 msec.
Is transmitted, the command data 52 for instructing the ID code and sounding is transmitted to the slave unit.

On the other hand, as shown in FIG.
Intermittent reception is performed at intervals of 50 msec. Therefore, when the slave receives the header 51 within the intermittent reception period 50, the slave stops intermittent reception and shifts to a continuous operation state, and after 650 msec from time to, When the ID code and the command data 52 for instructing sounding are received from the master unit, the sounding sound 53 as shown in FIG.
Generate.

At time t1 as shown in FIG.
In the case where there is an incoming call, the header 55 cannot be detected within the intermittent reception period 50. Therefore, after waiting until the next intermittent reception period 54, the header 55 sent from the master unit is detected, and A ringing sound is generated when a code or command data 56 for instructing a ringing is received. Therefore, the header sent from the master unit to the slave unit needs to be 650 msec long. Further, as another prior art, Japanese Patent Application Laid-Open No. 4-20022 discloses a method in which the time interval of the transmission signal and / or the intermittent reception period is adjusted so that the slave unit always receives the bit synchronization signal (header portion) at the first transmission. Some machines perform intermittent reception.

[0008]

In a conventional cordless telephone, when there is an incoming call, a header portion having a length of 650 msec, an ID code and command data for instructing ringing are transmitted from the parent device, and the child device transmits the data. Since it is configured to generate a ringing sound of a call, FIG.
As shown in FIG.
Even if the header 51 is sent from the parent device in synchronization with the
Unless the user waits for msec, there is a problem that the handset does not answer the incoming call and no ringing occurs.

In another conventional technique, the period of the bit synchronization signal is set so that the interval of the intermittent operation is shorter than the period of the bit synchronization signal. Therefore, the interval of the intermittent operation becomes relatively short, and the power consumption is reduced. If the intermittent operation interval is longer than the period of the bit synchronization signal, the intermittent operation may be stopped by the second or later transmission signal. May be lengthened. The present invention has been made in order to solve the above-described problem, and it has been proposed that the repetition period of the intermittent reception performed by the child device be determined with respect to the length of the header portion of the intermittent reception stop code sent from the parent device. It is an object of the present invention to provide a cordless telephone that can reduce the power consumption in the slave unit because it can be made long enough, and can shorten the length of the header part so that the incoming call response time can be shortened. .

[0010]

A cordless telephone according to the present invention transmits an intermittent reception stop code signal for stopping intermittent reception from a master unit to a slave unit when an incoming call is received. A cordless telephone that stops intermittent reception, connects the slave unit to a line via the master unit, and performs communication, and includes a header part and a data part repeatedly sent from the master unit to the slave unit. In a cordless telephone equipped with intermittent receiving means for intermittently receiving the header or data part of the intermittent reception stop code, the intermittent reception performed by the slave unit when the header or data part is received by the intermittent receiving means. The intermittent reception stop means for stopping and shifting the slave unit to the continuous operation state, and the data of the header part and the data part from the time of transition to the continuous operation state by the intermittent reception stop means are described. Storage means for storing data content, characterized in construction that a data discriminating means for discriminating the data contents by rearranging the data stored by the storage means.

[0011]

In the cordless telephone according to the present invention, when an incoming call is received, the master repeatedly transmits an intermittent reception stop code including a header portion and a data portion to the slave, while the slave performing intermittent reception receives the master. When the header or data part of the intermittent reception stop code sent from the machine is received, the intermittent reception that was being performed is stopped and the system shifts to the continuous operation state. In this state, the intermittent reception repeatedly sent from the master unit is stopped. Receiving data of the length of one data of the code, determining the data content of the intermittent reception stop code, and responding to the incoming call.
In this case, when the data part is to be received in the middle of the intermittent reception stop code, the data content of the data part of the intermittent reception stop code is determined based on the position of the received header part. Therefore, the length of the header portion of the intermittent reception stop code sent from the master unit may be sufficiently shorter than the repetition period of the intermittent reception performed by the slave unit.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a cordless telephone according to one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a master unit, and 2 denotes a slave unit. The master unit 1 includes a control unit 1a, an interface circuit 1b, a receiving unit 1c, and a synthesizer unit 1d.
And a transmitting / receiving unit 1e and a transmitting / receiving antenna 1f.

The control unit 1a of the master unit 1 is a circuit for controlling each unit when setting a wireless line with the slave unit 2, and controls the reception unit 1c, the synthesizer unit 1d, and the transmission unit 1e. I do.

The master unit 1 outputs a data composed of a combination of a header portion consisting of one pulse shown in FIG. 2C and eight pulse signals shown in FIGS. 2A and 2B. The intermittent reception stop code including the copy unit is repeatedly transmitted to the slave unit 2. That is, each pulse is distinguished by a difference in its pulse width. FIG. 3A shows an intermittent reception stop code composed of the header section 5 and the data section 6.
The interface circuit 1b is a circuit that performs connection with a telephone line and the like.

The slave unit 2 includes a CPU 21 and a slave unit control unit 2a including a RAM 22 and a ROM 23, which are one of storage units. The slave unit 2 further includes an operation unit 2b, a slave unit transmitting unit 2c, a slave unit synthesizer unit 2d, and a slave unit. It has a receiver 2e and a handset transceiver antenna 2f.

The slave unit control unit 2a is a circuit for controlling each unit when the slave unit 2 sets up a wireless line with the master unit 1. The slave unit control unit 2a controls the data of the data part of the received intermittent reception stop code. The content is determined, and the slave unit transmitting unit 2c, the slave unit synthesizer unit 2d, and the slave unit receiving unit 2e are controlled. In the slave unit 2, the intermittent reception period 11 having a length of 100 msec is repeated at intervals of 550 msec as shown in FIG. The operation unit 2b includes a group of operation keys such as ten keys (not shown), a transmitter, and a receiver.

Next, the operation will be described. FIG. 4 is a flowchart for explaining the operation of the slave unit in the cordless telephone of this embodiment.

First, when there is an incoming call to the base unit 1 via the telephone line, the base unit 1 transmits the intermittent reception stop code shown in FIG. Send repeatedly. When the intermittent reception stop code is transmitted from master unit 1 to slave unit 2, slave unit 2 is performing intermittent reception (step ST1). The handset 2 determines whether or not the intermittent reception stop code has been detected during the intermittent reception period (step ST2).

As shown in FIG. 3, when the intermittent reception period 11 of the slave unit 2 is reached while the intermittent reception stop code including the header part 5 and the data part 6 is repeatedly transmitted from the master unit 1, the slave unit 2 detects the pulse 12 of the data section 6 during this intermittent reception period. As a result, it is determined that the intermittent reception stop code has been detected at the time t1 shown in FIG. 3B, and the state shifts from the intermittent reception state to the continuous operation state. Then, the pulse of the data section 6 and the pulse of the header section 5 of the intermittent reception stop code transmitted from the master unit 1 following the pulse 12 of the data section 6 are detected, and the RAM 22
(Step ST3). In this case, the detected R
What is written to the AM 22 is the pulse 12 of the data section 6.
These are the pulses 13 to 19 sent later, the header section 5, and the first pulse 20 of the next data section. As a result, RA at time t2 shown in FIG.
The intermittent reception stop code as shown in FIG. 5 is stored in the register 31 set to M22.

Next, the header 32 is identified from the intermittent reception stop code stored in the register 31 (step S).
T4).

Further, based on the identified position of the header 32, the data part of the intermittent reception stop code sent from the master unit 1 is assembled (step ST5). The data part of the intermittent reception stop code is assembled by shifting the intermittent reception stop code data stored in the register 31 leftward by two bits since the position of the header 32 identified in step ST4 is the second bit from the least significant bit. The overflowing lower two bits are input to the register 31 again in order from the most significant bit and returned. As a result, FIG.
As shown in (1), the 8-bit data "01001001" sent from the master unit 1 is assembled and stored in the register 31.

When the 8-bit data "01001001" sent from master unit 1 is assembled, processing corresponding to the code data is executed, and the slave unit responds to an incoming call (step ST6). In this case, the length of the header part 5 of the intermittent reception stop code sent from the base unit 1 to the child unit 2 is 650 ms of the conventional intermittent reception stop code.
8 msec compared to a header having a length of ec.

[0023]

As described above, according to the present invention,
When there is an incoming call, the master unit transmits an intermittent reception stop code signal to the slave unit to stop the intermittent reception, stops the intermittent reception performed by the slave unit, and stops the slave unit via the master unit. A cordless telephone that performs communication by connecting to a line,
A cordless telephone comprising intermittent reception means for intermittently receiving the header part and the data part of the intermittent reception stop code comprising a header part and a data part repeatedly sent from the base unit to the child unit, wherein the intermittent reception means The intermittent reception stop means for stopping the intermittent reception performed by the slave unit when the header unit and the data part are received and shifting the slave unit to the continuous operation state, and the time when the intermittent reception stop unit shifts to the continuous operation state Storage means for storing the data of the header part and the data part for one data, and data determination means for determining the data content by rearranging the data stored by the storage means. Since the intermittent reception repetition cycle does not need to be shortened even if the Shortened, because the take sufficiently long repetition period of intermittent reception slave unit performs, there is an effect that measurably further reduction in power consumption in the handset.

[Brief description of the drawings]

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

FIG. 2 is a waveform diagram of signals constituting a header portion and a code portion of an intermittent reception stop code in the cordless telephone according to one embodiment of the present invention.

FIG. 3 is a timing chart showing the operation of the cordless telephone according to the embodiment of the present invention at the time of an incoming call in the slave unit.

FIG. 4 is a flowchart showing an operation of the slave unit in the cordless telephone according to one embodiment of the present invention.

FIG. 5 is an explanatory diagram showing an intermittent reception stop code stored in the RAM of the slave unit in the cordless telephone according to the embodiment of the present invention.

FIG. 6 is an explanatory diagram showing an intermittent reception stop code stored in a register set in a RAM of a slave unit in the cordless telephone according to one embodiment of the present invention.

FIG. 7 is a timing chart showing an operation at the time of an incoming call in a slave unit of a conventional cordless telephone.

[Explanation of symbols]

DESCRIPTION OF REFERENCE NUMERALS 1 parent device 2 child device 5 header portion 6 data portion 21 CPU (data portion intermittent reception means, intermittent reception stop means, data determination means)

Claims (1)

(57) [Claims] An intermittent reception stop code signal for stopping intermittent reception from a master unit to a slave unit when an incoming call is received, stops the intermittent reception performed by the slave unit, and transmits the signal via the master unit. A cordless telephone that performs communication by connecting the slave unit to a line, wherein the header portion and the data portion of the intermittent reception stop code including a header portion and a data portion repeatedly sent from the master unit to the slave unit. A cordless telephone provided with intermittent receiving means for intermittent reception, wherein when the intermittent receiving means receives a header portion or a data portion, the intermittent reception being performed by the slave unit is stopped and the slave unit is shifted to a continuous operation state. A receiving stop means, a storage means for storing one data of a header part and a data part from a point of transition to a continuous operation state by the intermittent reception stopping means, and the storage means. Cordless telephone, characterized in that a data discriminating means for discriminating the data contents by rearranging the stored data.