JP2000253448A - Digital cordless telephone system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the service life of a battery of a slave set by allowing a private master set to transmit a control signal to a slave set resident in an area where a public mode service area and a private mode service area are overlapped through the use of a time slot adjacent to that of a control signal for a public master set to educe the power consumption of the slave set in its standby state. SOLUTION: The private master set 4 sets a private use control signal transmission period on the basis of a control signal transmission period for the public master set 3, writes the information to control data and conducts encoding. Then the private master set 4 sets a time slot to accommodate a private control signal to a position of a time slot adjacent behind that of a public control signal and transmits the control signal to a slave set 5. The slave set 5 receives both the public and private control signals, its transmission control section stores in advance periods of control signals of each master set 4, activates a power supply of a radio section in a timing earlier by a prescribed time from a leading edge of the public control signal to be received, and succeedingly receives the public control signal set behind by oe time slot. Thus, number of times of on/off of the power supply of the slave set can be reduced and the power on-time can be decreased.

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 system, and more particularly to a digital cordless telephone system including a public base unit, a private base unit, and a slave unit.

[0002]

2. Description of the Related Art Conventionally, in a digital cordless telephone system in which a handset is located in an area where a public mode service area and a self-service mode service area in which the handset is registered overlap, a public base unit and a self-service Each of the master units transmitted a control signal to the slave unit at its own timing. FIG. 10 is a time-division multiple access system (hereinafter, referred to as TDMA) time-division time slot (personal
In a conventional digital cordless telephone system for performing wireless communication using a handy phone system (hereinafter, referred to as PHS) in a 625 μs width, a public base unit and a private base unit each transmit a control signal transmitted to a slave unit. FIG. 4 is an explanatory diagram showing timing and on / off control timing of a wireless unit power supply of a slave unit that has received these control signals.

In FIG. 10, control signals 701 and 702
Is a public control signal transmitted from the public parent device to the child device, and control signals 703 and 704 are private control signals transmitted from the private parent device to the same child device. Each of the public control signal and the private control signal has a fixed period (PH).
In the example of S, the transmission is performed with a public control signal transmission cycle = 120 ms and a private control signal transmission cycle = 100 ms). Further, the public control signal and the private control signal are respectively determined frequencies (in the example of PHS, the public control signal frequency = 1899.950 MHz, the private control signal frequency = 1
898.450 MHz).

FIG. 11 is an explanatory diagram showing in detail the on / off control timing of the power supply of the radio unit of the slave unit in the digital cordless telephone system according to the conventional example. The wireless power source of the slave unit shown in FIG. 10 is divided into a power source for the slave unit synthesizer for determining the reception frequency and a power source for the slave unit receiver. Indicates that time is needed.

[0005] As shown in FIG. 11, the power supply of the slave unit receiving section is about 1.5 m further forward than the received control signal for stable operation.
s, and the slave synthesizer power supply requires a setup time of about 6 ms further ahead of the received control signal to stabilize the generated frequency.

Conventionally, the public control signal and the private control signal are not synchronized, and are transmitted at their own periods and timings. 6 ms + 625 μs, and about 6 ms + 6 for receiving the private control signal 703.
It was necessary to control the power supply of the radio unit of the slave unit for 25 μs for a total time of about 13.3 ms.

As described above, in the conventional example, in the area where both the public control signal and the private control signal can be received,
Since the slave unit in the standby connection state receiving both control signals had to control the power of the wireless unit to be turned on and off each time the public control signal and the private control signal were received, the wireless unit was turned on. As the number of times increases, the power-on time becomes longer, and the power consumption in the standby connection state increases, and it is not possible to extend the duration of the battery built in the slave unit due to this inefficient reception control. Was.

However, as a conventional example in which this is improved, there is a digital cordless telephone device disclosed in Japanese Patent Application Laid-Open No. 7-75165, and in a digital cordless telephone device including a plurality of parent devices and child devices, a plurality of parent devices are used. The control signal transmitted from the base unit serving as a reference is received by another base unit, and the control signal is transmitted from the other base unit in synchronization with the reception timing of the control signal. Is to reduce power consumption during standby by performing intermittent operation at a certain timing.

[0009]

However, Japanese Patent Laid-Open No. 7-7 / 1995
In the conventional example described in Japanese Patent No. 5165, as described above, the set-up time of about 6 ms for stabilizing the generation frequency of the power supply of the slave synthesizer and the operation stability of the slave receiver power supply are actually required. About 1.5 for
ms setup time is not mentioned at all,
It merely describes that the interval between control signals transmitted from other masters following the master control signal serving as a reference among the plurality of masters is 5 ms. That is, when there are two master units, actually 5 ms + 625 μs
It is necessary that the power of the slave unit synthesizer be turned on for a period of about 11.6 ms obtained by adding about 6 ms to
About 7.1 m obtained by adding about 1.5 ms to 5 ms + 625 μs
During the period of s, the power of the slave unit receiving unit needs to be on. Therefore, simply setting the interval between the control signals from the two master units to 5 ms (time slot width = 625 μs, which is equivalent to one frame width in the case of 4-channel TDMA) reduces the power consumption of the slave unit in the standby connection state. There is a problem that it cannot be sufficiently reduced.

[0010] An object of the present invention is to include a public base unit, a self-maintained base unit and a slave unit, and set a child mode in an area where the public mode service area and the self-service mode service area in which the slave unit is registered overlap. It is an object of the present invention to provide a digital cordless telephone system capable of reducing power consumption in a standby connection state of a slave unit when a handset is located, compared to the conventional example.

[0011]

According to a first aspect of the present invention, there is provided:
A public parent device, a private parent device, and a child device, and at least the private parent device and the child device are located in an area where a public mode service area and a private mode service area in which the child device is registered overlap. Machine is located, by the time-division multiple access system air interface, while the slave unit is standby-connected to the public master unit by a public control signal transmitted from the public master unit to the slave unit, In a digital cordless telephone system in which the slave unit is also standby-connected to the slave unit by a slave control signal transmitted from the slave unit to the slave unit, the slave unit is connected to the public telephone. Receiving the public control signal transmitted from the parent device to the child device, acquiring timing information of the public control signal, and obtaining the public control signal based on the timing information. Characterized in that the timing adjacent to the signal to transmit the private control signal to the slave unit.

[0012] Further, based on the acquired timing information, the self-maintained master unit transmits the self-employed control signal in a transmission cycle of n (n is an integer of 1 or more) times the transmission cycle of the public control signal. It is characterized in that it is transmitted to the slave unit.

[0013] Further, the self-service master unit transmits the self-use control signal to the slave unit in a time slot adjacent to the public control signal based on the acquired timing information. .

[0014] Further, the self-service master unit transmits the self-service control signal to the slave unit in an arbitrary time slot when the public control signal cannot be received. .

Further, the self-maintained master unit includes an antenna, a radio unit, a codec, a subscriber circuit connection unit, and a communication control unit, and the communication control unit demodulated and output from the radio unit. First means for receiving and decoding a public control signal, second means for receiving a decode output of the first means and detecting a transmission cycle of the public control signal, and transmission of the second means Third means for receiving a cycle detection output and calculating the transmission cycle of the private control signal, and fourth means for receiving the transmission cycle calculation output of the third means and encoding the private control signal, And a fifth means for transmitting the private control signal encoded by the fourth means based on the transmission cycle calculated by the third means.

In the communication control method applied to the first configuration of the present invention, a second step of searching for the public control signal transmitted from the public base unit after the first step of power-on is provided. Step, after the second step, a third step of determining whether the public control signal has been received based on the search result of the second step, and after the third step, the third step If it is determined from the result of the step that the signal has been received, a fourth step of acquiring transmission cycle information included in the public control signal, and a fourth step after the fourth step, A fifth step of setting a transmission cycle of the private control signal to n (n is an integer of 1 or more) times a transmission cycle of the public control signal based on the obtained transmission cycle information; After the fifth step A sixth step of starting transmission of the private control signal by an adjacent time slot of the public control signal according to a transmission cycle of the private control signal obtained in the step, and after the third step, the third step. If it is determined that the message cannot be received as a result of the steps in
A seventh step of starting transmission of the private control signal by an arbitrary time slot; and an eighth step of shifting to a steady operation state after the sixth step or the seventh step. And

Further, a second configuration of the present invention comprises a public base unit, a private unit and a child unit, and the public mode service area and the private mode service area in which the child unit is registered overlap. The public master unit and the slave unit are located at least in the area where the slave unit is located. A digital device in which the slave unit is also standby-connected to the public master unit by a public control signal transmitted from the public master unit to the slave unit while the slave unit is standby-connected to the private master unit. In the cordless telephone system, the public base unit receives the private control signal transmitted from the private base unit to the slave unit and acquires timing information of the private control signal. , And transmits the public control signals by a timing adjacent to the private control signal based on the timing information to the handset.

Further, the public master unit, based on the acquired timing information, transmits the public control signal at a transmission cycle of n (n is an integer of 1 or more) times the transmission cycle of the private control signal. It is characterized in that it is transmitted to the slave unit.

Further, the public master unit transmits the public control signal to the slave unit in a time slot adjacent to the private control signal based on the acquired timing information. .

Further, the public master unit transmits the public control signal to the slave unit in an arbitrary time slot when the private control signal cannot be received. .

Further, the public base unit includes an antenna, a radio unit, a codec, a subscriber circuit connection unit, and a communication control unit, and the communication control unit demodulated and output from the radio unit. First means for receiving and decoding the private control signal, second means for receiving the decoded output of the first means and detecting a transmission cycle of the private control signal, and transmitting the second means A third means for receiving a cycle detection output and calculating a transmission cycle of the public control signal; a fourth means for receiving the transmission cycle calculation output of the third means and encoding the public control signal; And a fifth means for transmitting the public control signal encoded by the fourth means on the basis of the transmission cycle calculated by the third means.

Further, in the communication control method applied to the second configuration of the present invention, after the first step of turning on the power, a second control for retrieving the private control signal transmitted from the private base unit is performed. Step, after the second step, a third step of determining whether the private control signal has been received based on the search result of the second step, and after the third step, the third step If it is determined that the signal has been successfully received according to the result of the step, a fourth step of acquiring transmission cycle information included in the private control signal, and after the fourth step, the information is obtained in the fourth step. A fifth step of setting a transmission cycle of the public control signal to n (n is an integer of 1 or more) times a transmission cycle of the private control signal based on the obtained transmission cycle information; After the fifth step A sixth step of starting transmission of the public control signal in a time slot adjacent to the private control signal according to a transmission cycle of the public control signal obtained in the step, and after the third step, the third step. If it is determined that the message cannot be received as a result of the steps in
A seventh step of starting transmission of the public control signal by an arbitrary time slot, and an eighth step of shifting to a steady operation state after the sixth step or the seventh step. And

Further, in the first or second configuration of the present invention, the slave unit that has received the public control signal and the private control signal transmitted at adjacent timings includes the public control signal or The power supply of the wireless unit of the slave unit is controlled to be turned on by a fixed time earlier than the leading edge of the private control signal located forward, and the rear part of the public control signal or the private control signal is located The power of the wireless unit of the slave unit is turned off at the trailing edge of the slave unit.

[0024]

FIG. 1 is a block diagram of a digital cordless telephone system according to a first embodiment of the present invention.
This will be described with reference to FIG. In this configuration, the public mode service area 1 in which the public parent device 3 provides service, and the private parent device 4
Partially overlaps with the self-service mode service area 2 in which the service is provided. In addition, the private parent device 4 and the child device 5 are located in this overlapping area. In addition, the air interface in the standby connection state of the slave unit transmits a downlink public control signal of a specific frequency (the public control signal frequency = 189 in the case of the PHS) from the public master unit 3 to the slave unit 5.
9.95 MHz).
Is performed by an uplink public control signal transmitted alternately with a downlink public control signal at the same frequency. Conversely, the control signal (in the example of the PHS, the control signal frequency for private use = 1898.45 MHz) is alternately transmitted from the child device 5 to the parent device 4 using the same frequency as the downlink private control signal. This is performed by an uplink self-service control signal.

FIG. 2 shows a 4-channel TDMA frame structure common to the public and private control signals.
One frame is 5 ms, and this frame is continuous at the public control signal frequency or the private control signal frequency. In the first half of the frame, up time slots for four channels are arranged, and in the second half, down time slots for four channels are arranged. One time slot width is 625 μs for PHS
And the uplink public control signal and the uplink private control signal are accommodated in any one of the four uplink time slots,
The downlink public control signal and the downlink private control signal are accommodated in any one of four downlink time slots.

As described above, in each master unit, at each control signal frequency, the control signal is transmitted in the first half of the frame, and the control signal is received in the second half of the frame. Hereinafter, the public and private control signals are all downlink control signals.

FIG. 3 shows the structure of the public and private control signals. The configuration of the public control signal and the private control signal is the same, and is composed of 240 bits. The transmission cycle information of the public control signal transmitted from the public parent device 3 to the child device 5 or the transmission control information of the private control signal transmitted from the private parent device 4 to the child device 5 is both contained in the control data portion. ing.

A public control signal is transmitted from the public parent device 3 to the child device 5 located in the public mode service area 1, and a child control signal located in the private mode service area 2 is transmitted from the private parent device 4. Since the private control signal is transmitted to the mobile device 5, the mobile device 5 is connected in a standby state while receiving the control signals of both of the base devices.

At the same time, the private parent device 4 located in the public mode service area 1 receives the public control signal transmitted from the public parent device 3 to the child device 5. Therefore, both the public parent device 3 and the private parent device 4 may be located in an area where the public mode service region 1 and the private mode service region 2 overlap.

Next, the configuration of the private parent device of the digital cordless telephone system according to the first embodiment of the present invention will be described with reference to FIG. The self-main unit 4 has an antenna 1
01, an antenna switch 102 for switching the connection of the antenna 101 between transmission and reception, and a wireless transmission unit 10
3, a wireless receiving unit 105, a synthesizer 104,
Channel codec 106 and audio codec 107
, A subscriber circuit connection unit 108, and a communication control unit 109.
Channel encoder / decoder 11 for four MA channels
1a to 111d and the corresponding timing control unit 1
12a to 112d, and the audio codec 10
Reference numeral 7 denotes a D / A / A / D converter 113, ADPCM codecs 114a to 114d, and a VOX 115.

First, when the private parent device 4 receives a public control signal from the public parent device 3, the communication control unit 109 sends the signal to the synthesizer 1 via the channel codec 106.
04 is controlled, the receiving frequency of the receiving unit 105 is set, and the data signal from the public base unit 3 received by the antenna 101 is demodulated by the receiving unit 105 via the antenna switch 102 and transmitted to the channel codec 106. Is output. In the channel codec 106, reception frequency control is performed by channel encoders / decoders 111a to 111d, and timing control units 112a to 112d
Controls the reception timing. The voice codec 107 is used in a call state, and the ADPCM signal from the channel codec 106 is
7, the ADPCM codecs 114a to 114
d, converted into a digital signal, converted into an analog audio signal by a D / A, A / D converter 113 and input to the subscriber circuit connection unit 108, and also input from the ISDN line 110 via the subscriber circuit connection unit 108. The converted analog audio signal is supplied to a D / A, A / D converter 113.
Is converted to a digital signal by ADPCM codecs 114a to 114d, and is input to the channel codec 106. The subscriber circuit connection unit 108 performs an interface for transmitting analog audio signal information to the accommodated ISDN line 110. The VOX 115 detects the presence or absence of voice during a call and controls background noise.

Next, when the private parent device 4 transmits a private control signal to the child device 5, the communication control unit 109 sends the signal to the synthesizer 104 via the channel codec 106.
, The transmission frequency of the transmission unit 103 is set, the data signal output from the channel codec 106 is modulated by the transmission unit 103, and the antenna switch 1
02 from the antenna 101. At this time, in the channel codec 106, transmission frequency control is performed by the channel encoder / decoders 111a to 111d, and transmission timing is controlled by the timing control units 112a to 112d.

Next, the configuration of the communication control unit 109 of the private parent device 4 of the digital cordless telephone system according to the first embodiment of the present invention will be described with reference to FIG. The communication control unit 109 receives a public control signal received by the receiving unit 105 from the channel codec 106 and decodes the public control signal, and receives a decode output from the control signal decode unit 501. Reception control signal cycle detection section 502 for detecting a reception cycle of a control signal
A transmission control signal period calculation unit 503 that receives the reception period value of the control signal from the reception control signal period detection unit 502 and calculates the transmission period of the private control signal, and a transmission period from the transmission control signal period calculation unit 503 A control signal encoding unit 504 for generating a private control signal to receive and transmit the value, and a control for transmitting a private control signal generated by the control signal encoding unit 504 according to the transmission cycle value calculated by the transmission control signal cycle calculation unit 503. A signal transmission cycle control unit 505 is provided.

Next, the configuration of the slave unit of the digital cordless telephone system according to the first embodiment of the present invention will be described with reference to FIG. The slave unit 5 includes an antenna 201, an antenna switch 202 that switches connection of the antenna 201 between transmission and reception, a wireless transmission unit 203, a wireless reception unit 205, a synthesizer 204, a channel codec 206, The audio codec 207, the microphone / speaker 216, and the communication control unit 209 are further included. The channel codec 206 includes a channel encoder 211 and a timing control unit 212. The audio codec 207 includes D / A, A / D converter 213
, An ADPCM codec 214, and a VOX 215.

First, when the slave unit 5 receives the public control signal from the public master unit 3 or the private control signal from the private master unit 4, the communication control unit 209 sends the signal to the synthesizer via the channel codec 206. The generation frequency of the reception unit 204 is controlled, the reception frequency of the reception unit 205 is set, and the antenna 2
01, the data signal from the public parent device 3 or the private control signal from the private parent device 4 is demodulated by the receiving unit 205 via the antenna switch 202 and input to the channel codec 206. Channel codec 20
In 6, the reception frequency control is performed by the channel encoder / decoder 211, and the reception timing is controlled by the timing control unit 212. Audio codec 207
Is used in a call state, the ADPCM signal from the channel codec 206 is input to the voice codec 207,
The analog signal is converted into a digital signal by the ADPCM codec 214, converted to an analog audio signal by the D / A / A / D converter 213, and output to the microphone / speaker 216 as an audio signal. D / A, A / D converter 2
The digital signal is converted into a digital signal by the ADPCM 13, converted into an ADPCM signal by the ADPCM codecs 214 a to 214 d and input to the channel codec 206. Also, V
The OX 215 detects the presence / absence of voice during a call and controls background noise.

Next, when the slave unit 5 transmits a control signal to the public master unit 3 or the private master unit 4, the communication control unit 2
09 controls the generation frequency of the synthesizer 204 via the channel codec 206 to set the transmission frequency of the transmission unit 203, and the data signal output from the channel codec 206 is modulated by the transmission unit 203 and transmitted via the antenna switch 202. It is transmitted from the antenna 201.

In the standby connection state, the slave unit 5 transmits a public control signal transmitted from the public master unit 3 or a private control signal transmitted from the private master unit 4 to the communication control unit 20.
In step 9, the power supply 217 of the receiving unit 205 and the power supply 218 of the synthesizer 204 are controlled to be turned on only in a period necessary for receiving these control signals in synchronization with each transmission cycle.

Next, the operation of the digital cordless telephone system according to the first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to 7, 8, and 9. FIG. 7 shows control steps for the self-main unit 4 to adjust the self-control signal to the timing of the received public control signal. The processing of each step is executed by the communication control 109 of FIG.

In the order of the steps, first, in step 601, when the power of the private parent unit 4 is turned on, in step 602, the reception control signal decoding unit 501
Searches for the timing of the public control signal transmitted by the public base unit 3. The public control signal input from the receiving unit 105 via the channel codec 106 is decoded by the reception control signal decoding unit 501, and becomes data in the format shown in FIG.

Next, in step 603, the reception control signal decoding unit 501 determines whether a public control signal has been received based on the search result in step 602.

If the public control signal has been successfully received, then in step 604, the reception control signal cycle detecting section 502 sets the public control signal transmission cycle included in the control data portion of the public control signal shown in FIG. Get information.

Next, in step 605, the transmission control signal cycle calculation unit 503 sets the private control signal transmission cycle to n of the public control signal transmission cycle based on the information obtained in step 604.
(N is an integer of 1 or more) times, and the transmission control signal encoding unit 504 writes the set private control signal transmission cycle information in the control data portion of the format shown in FIG. 3 and performs encoding.

Next, at step 606, the transmission control signal transmission cycle control unit 505 sets the time slot for accommodating the private control signal behind the public control signal (the same effect can be obtained in front of the public control signal as well). It is set to an adjacent time slot position, and transmission of the private control signal is started in accordance with the transmission cycle set in step 605. After that, in step 608, the state shifts to the steady state.

If the public control signal cannot be received, the transmission control signal encoding unit 504 sets an arbitrary time slot in step 607, and the transmission control signal transmission cycle control unit 505 sets the time slot according to the setting. Start transmission of the private control signal. After that, in step 608, the state shifts to the steady state.

As a result of the above series of control steps, the private parent device 4 can transmit the private control signal to the child device 5 at the time slot position adjacent to the public control signal.

Since the transmission frequency of the public control signal is different from that of the private control signal, the slave unit 5 sets the reception frequency of the public control signal and the private control signal set in the adjacent time slot in the receiving section. The switching is performed in the guard bit period at the end of the public control signal located ahead.

Next, FIG. 8 shows a public parent device 3 and a private parent device 4.
FIG. 4 is an explanatory diagram of control timing of the slave unit 5 and a time slot (625 μs in PHS) which is a time-divided period.
Of the public control signals 301 and 302 transmitted from the public parent device 3 to the child device 5 and transmitted from the private parent device 4 to the child device 5. The positional relationship of the slots is shown. FIG. 8 shows that n =
1, that is, a case where the transmission cycle of the public control signal is equal to the transmission cycle of the private control signal. However, n may be an integer of 1 or more. For example, if n = 2, two cycles of the public control signal are set. The control signal for private use is transmitted once every one time.

In FIG. 8, the one indicated as "transmission" indicates a control signal transmitted from the public master unit 3 or the private master unit 4 to the slave unit 5, and the one indicated as "receive" indicates the slave unit. 5 shows a control signal transmitted to the public parent device 3 or the private parent device 4. A broken line in FIG. 8 indicates a time slot position where a control signal can be transmitted. One frame is composed of four transmission slots and four reception slots.
Frame containing 302 and private control signal 30
The phase of the frame in which 3,304 is accommodated matches. In addition, as described above, the private control signal 303,
The transmission cycle of 304 is set to the same value as the transmission cycle of the public control signals 301 and 302 (120 ms in an example of PHS), and the private control signals 303 and 304 are adjacent to the rear of the public control signals 301 and 302. It is transmitted at the time slot position.

Since the slave unit 5 is located in both the public mode service area and the private mode service area, the public control signals 301 and 302 and the private control signals 303 and 304 are provided.
And both receive. Since the communication control unit 209 of the child device 5 stores the cycle of the control signal transmitted from each parent device by the same operation as the communication control unit 109 of the private parent device 4,
From the leading edge of the public control signals 301 and 302 to be received, the radio unit power is turned on at a timing earlier by a predetermined time necessary for stabilizing the operation of the radio unit, and the radio unit is kept on and remains on for one time slot. Control signals 303 and 3
04, the private control signals 303, 304
Turn off the wireless unit power at the trailing edge.

FIG. 9 is a detailed explanatory diagram of FIG. 8. In order to stably receive the public control signal 301, the synthesizer power supply 218 of the slave unit 5 is turned on about 6 ms earlier than the leading edge of the public control signal 301. As a result, the receiving section power supply 217 is similarly turned on about 1.5 ms earlier. Thereafter, when the reception of the private control signal 303 is completed, the private control signal 30
3 on the receiving edge power supply 217 and the synthesizer power supply 21
8 are simultaneously turned off.

Therefore, when receiving both the public control signal and the private control signal, the synthesizer power supply 218 operates at about 7.
Since the ON time of the receiving unit power supply 217 is controlled only for about 2.75 ms for 25 ms, the operation time of the wireless unit of the slave unit can be reduced by about 40% as compared with the conventional example.

In this way, by making the time slots of the public control signal and the private control signal adjacent to each other,
Can turn on the radio unit power once and receive both the public control signal and the private control signal collectively, so that the number of times the radio unit power of the slave unit 5 is turned on and off is reduced, and the power-on time is reduced. Therefore, the power consumption of the child device 5 can be significantly reduced.

Next, the configuration of a digital cordless telephone system according to a second embodiment of the present invention will be described. The configuration of the digital cordless telephone system according to the second embodiment of the present invention is the same as that of the digital cordless telephone system according to the first embodiment of the present invention except that the public base unit and the private base unit are replaced. is there.
That is, when at least the public parent device and the child device are located in an area where the public mode service region and the private mode service region in which the child device is registered overlap, the public parent device becomes The parent device receives a private control signal transmitted to the child device, and transmits a public control signal in a time slot adjacent to the private control signal.

First, the public base unit of the digital cordless telephone system according to the second embodiment of the present invention has the same configuration as that of the private base unit of the digital cordless telephone system according to the first embodiment of the present invention. Having a configuration.

Further, the communication control unit of the public base unit of the digital cordless telephone system according to the second embodiment of the present invention is the communication control unit of the private base unit of the digital cordless telephone system according to the first embodiment of the present invention. It has the same configuration as that of the communication control unit, and performs the same control steps.

Further, the private base unit of the digital cordless telephone system according to the second embodiment of the present invention has the same configuration as the private base unit of the digital cordless telephone system according to the first embodiment of the present invention. Have.

The slave unit of the digital cordless telephone system according to the second embodiment of the present invention has the same configuration as the slave unit of the digital cordless telephone system according to the first embodiment of the present invention, and The same on / off control of the radio unit power supply is performed.

The frame configuration and control signals of the air interface of the digital cordless telephone system according to the second embodiment of the present invention are the same as those in the digital cordless telephone system according to the first embodiment of the present invention. .

Next, the operation of the digital cordless telephone system according to the second embodiment of the present invention will be described. The public base unit of the digital cordless telephone system according to the second embodiment of the present invention performs the same operation as the private base unit of the digital cordless telephone system according to the first embodiment of the present invention. Therefore, the slave unit can obtain exactly the same power reduction effect as in the digital cordless telephone system according to the first embodiment of the present invention.

[0060]

As described above, when the first embodiment of the present invention is used, the private parent device transmits the private control signal in a time slot adjacent to the public control signal transmitted by the public parent device. Can be transmitted, and by using the second embodiment of the present invention, the public base unit transmits the public control signal in a time slot adjacent to the private control signal transmitted by the private base unit. The slave unit in the standby connection state within the area where both the public control signal and the private control signal can be received can collectively receive the public control signal and the private control signal in a short time. Therefore, it is possible to minimize the number of times the wireless unit is turned on and off, thereby shortening the power-on time, thereby minimizing power consumption, and making the battery life of the slave unit longer than before. Is long It is possible to realize a dress telephone system.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a digital cordless telephone system according to a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a frame of the digital cordless telephone system according to the first embodiment of the present invention.

FIG. 3 is a configuration diagram of control signals of the digital cordless telephone system according to the first embodiment of the present invention.

FIG. 4 is a block diagram of a private parent device of the digital cordless telephone system according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram of a communication control unit of the private parent device of the digital cordless telephone system according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram of a slave unit of the digital cordless telephone system according to the first embodiment of the present invention.

FIG. 7 is an explanatory diagram of control steps of a communication control unit of the private parent device of the digital cordless telephone system according to the first embodiment of the present invention.

FIG. 8 is an explanatory diagram of control timings of the public parent device, the private parent device, and the child device of the digital cordless telephone system according to the first embodiment of the present invention.

FIG. 9 is a detailed explanatory diagram of FIG. 8;

FIG. 10 is an explanatory diagram of control timings of a public parent device, a private parent device, and a child device of a digital cordless telephone system according to a conventional example.

FIG. 11 is a detailed explanatory diagram of FIG. 10;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Public mode service area 2 Self-employed mode service area 3 Public master unit 4 Self-employed master unit 5 Slave unit 101, 201 Antenna 102, 202 Antenna switch 103, 203 Transmitter 104, 204 Synthesizer 105, 205 Receiver 106, 206 Channel Codec 107, 207 Voice codec 108 Subscriber circuit connection unit 109, 209 Communication control unit 110 ISDN lines 111a to 111d, 211 channel encoder /
Decoders 112a to 112d, 212 Timing control units 113, 213 D / A, A / D converters 114a to 114d, 214 ADPCM codec 115, 215 VOX 216 Microphone / speaker 301, 302, 701, 702 Public control signals 303, 304, 703, 704 Self-employed control signal 501 Reception control signal TE code part 502 Reception control signal cycle detection part 503 Transmission control signal cycle calculation part 504 Transmission control signal encoding part 505 Transmission control signal transmission cycle control part 601 Step of turning on power 602 Public parent Step 603 of searching for a public control signal transmitted by the device 603 Step of determining whether the public control signal has been received 604 Step of obtaining public control signal transmission cycle information included in the public control signal 605 Transmission of private control signal Step 606 of setting the cycle to be the same as the public control signal transmission cycle Step 606 of starting transmission of a private control signal in a time slot adjacent to the public control signal 607 Step of starting transmission of a private control signal in an arbitrary time slot 608 Steps to transition to state

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[Procedure amendment]

[Submission Date] March 3, 2000 (200.3.3)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Change

[Correction contents]

[0011]

According to a first aspect of the present invention, there is provided:
A public parent device, a private parent device, and a child device, and at least the private parent device and the child device are located in an area where a public mode service area and a private mode service area in which the child device is registered overlap. Machine is located, by the time-division multiple access system air interface, while the slave unit is standby-connected to the public master unit by a public control signal transmitted from the public master unit to the slave unit, In a digital cordless telephone system in which the slave unit is also standby-connected to the slave unit by a slave control signal transmitted from the slave unit to the slave unit, the slave unit is connected to the public telephone. from use the master unit receives the public control signals to be transmitted to the slave unit retrieves the timing information of the public control signals, based on the timing information, for said public The transmission cycle of the control signal n (n is 1 or more
The public control signal is collected in accordance with the transmission cycle of (integer) times.
Before the time slot adjacent to the received time slot
The private control signal is accommodated and transmitted, and the public control signal is received.
If you are unable to receive the
The control signal for private use is transmitted by lot .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0012

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[Document name to be amended] Statement

[Correction target item name] 0013

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[Procedure amendment 5]

[Document name to be amended] Statement

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[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0017

[Correction method] Change

[Correction contents]

Further, a second configuration of the present invention comprises a public base unit, a private unit and a child unit, and the public mode service area and the private mode service area in which the child unit is registered overlap. The public master unit and the slave unit are located at least in the area where the slave unit is located, and a time-division multiple access air interface is used to control the slave unit by the slave control signal transmitted from the slave unit to the slave unit. A digital device in which the slave unit is also standby-connected to the public master unit by a public control signal transmitted from the public master unit to the slave unit while the slave unit is standby-connected to the private master unit. In the cordless telephone system, the public base unit receives the private control signal transmitted from the private base unit to the slave unit and acquires timing information of the private control signal. , Based on the timing information, before
N (n is an integer of 1 or more) of the transmission cycle of the private control signal
According to double transmission cycle, the private control signal is accommodated
A time slot adjacent to the time slot
Accommodates and transmits control signals and receives the private control signals
If you can't
And transmitting the public control signal .

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0018

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[Procedure amendment 8]

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[Procedure amendment 9]

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[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0023

[Correction method] Change

[Correction contents]

Further, in the first or second configuration of the present invention, the slave unit that receives the public control signal and the private control signal accommodated and transmitted in adjacent time slots is connected to the public unit. Of the control signal and the private control signal, the power supply of the wireless unit of the slave unit is controlled to be turned on by a fixed time further from the leading edge located forward, and the public control signal and the private control signal are The power supply of the radio unit of the slave unit is controlled to be turned off at the rear edge of the rear unit.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takaji Hori 1-403, Kosugi-cho, Nakahara-ku, Kawasaki-shi, Kanagawa Prefecture 53 Inside NEC Ic Microcomputer System Co., Ltd. (72) Inventor Chiemi Hashimoto Kosugi, Nakahara-ku, Kawasaki-shi, Kanagawa 1-Chome 403 53 NEC Icy Microcomputer System Co., Ltd. F-term (reference) 5K067 AA43 BB04 BB08 CC22 EE04 EE10 EE23 EE71 GG02 GG11 JJ13

Claims (13)

[Claims] 1. An apparatus comprising a public base unit, a self-maintained base unit and a slave unit, wherein at least the self-service unit is located in an area where a public mode service area and a self-service mode service area in which the slave unit is registered overlap. The parent device and the child device are located, and the child device is connected to the public parent device by a public control signal transmitted from the public parent device to the child device by a time-division multiple access air interface. In the digital cordless telephone system in which the slave unit is also connected to the slave unit by a slave control signal transmitted from the slave unit to the slave unit while the standby unit is connected, the slave unit is connected to the slave unit. The device receives the public control signal transmitted from the public parent device to the child device to obtain timing information of the public control signal, and based on the timing information A digital cordless telephone system, wherein the private control signal is transmitted to the slave at a timing adjacent to the public control signal. 2. The self-employed parent device, based on the acquired timing information, transmits a transmission cycle of the public control signal n.
2. The digital cordless telephone system according to claim 1, wherein said private control signal is transmitted to said slave unit at a transmission cycle times (n is an integer of 1 or more). 3. The self-service master unit transmits the self-use control signal to the slave unit in a time slot adjacent to the public control signal based on the acquired timing information. Any one of claims 1 and 2
Digital cordless telephone system according to the item. 4. The private-use parent device transmits the private-use control signal to the child device by an arbitrary time slot when the public-use control signal cannot be received. The digital cordless telephone system according to claim 3. 5. The self-main unit comprises an antenna, a radio unit, a codec, a subscriber circuit connection unit, and a communication control unit, and the communication control unit demodulated and output from the radio unit. First means for receiving and decoding a public control signal; second means for receiving a decode output of the first means and detecting a transmission cycle of the public control signal;
A third means for receiving the transmission cycle detection output of the means and calculating the transmission cycle of the private control signal; and a fourth means for receiving the transmission cycle calculation output of the third means and encoding the private control signal. And means for transmitting the private control signal encoded by the fourth means based on the transmission cycle calculated by the third means. 3. The digital cordless telephone system according to 3. 6. A second step of searching for the public control signal transmitted from the public master after a first step of turning on the power, and after the second step,
A third step of determining whether or not the public control signal has been received based on the search result of the step; and, if it is determined that the public control signal can be received after the third step, based on a result of the third step. Acquiring a transmission cycle information included in the public control signal,
After the step, the transmission cycle of the private control signal is changed to n (n is an integer of 1 or more) of the transmission cycle of the public control signal based on the transmission cycle information obtained in the fourth step.
A fifth step of setting the number of times, and after the fifth step, the private control by the adjacent time slot of the public control signal according to the transmission cycle of the private control signal obtained in the fifth step. After the sixth step of starting signal transmission and the third step, if it is determined that the signal cannot be received according to the result of the third step,
A seventh step of starting transmission of the private control signal by an arbitrary time slot; and an eighth step of shifting to a steady operation state after the sixth step or the seventh step. A communication control method applied to a digital cordless telephone system according to claim 5. 7. A public parent device, a private parent device, and a child device, wherein at least the public business device is located in an area where a public mode service area and a private business service area in which the child device is registered overlap. The master unit and the slave unit are located, and the slave unit is connected to the slave unit by a self-control signal transmitted from the slave unit to the slave unit by a time-division multiple access air interface. In a digital cordless telephone system in which the slave unit is also standby-connected to the public master unit by a public control signal transmitted from the public master unit to the slave unit while being connected in standby, the public master unit The device receives the private control signal transmitted from the private parent device to the child device, acquires timing information of the private control signal, and based on the timing information. A digital cordless telephone system, wherein the public control signal is transmitted to the slave at a timing adjacent to the private control signal. 8. The public base unit, based on the acquired timing information, transmits a self-control signal transmission cycle of n
8. The digital cordless telephone system according to claim 7, wherein said public control signal is transmitted to said slave unit at a transmission cycle times (n is an integer of 1 or more). 9. The public base unit transmits the public control signal to the slave unit in a time slot adjacent to the private control signal based on the acquired timing information. Any one of claims 7 and 8
Digital cordless telephone system according to the item. 10. The public master unit transmits the public control signal to the slave unit in an arbitrary time slot when the private control signal cannot be received. The digital cordless telephone system according to claim 9. 11. The public base unit includes an antenna, a radio unit, a codec, a subscriber circuit connection unit, and a communication control unit, and the communication control unit demodulated and output from the radio unit. First means for receiving and decoding the private control signal, second means for receiving the decoded output of the first means and detecting a transmission cycle of the private control signal, and transmitting the second means A third means for receiving a cycle detection output and calculating a transmission cycle of the public control signal; a fourth means for receiving the transmission cycle calculation output of the third means and encoding the public control signal; 10. The digital device according to claim 9, further comprising: fifth means for transmitting the public control signal encoded by the fourth means based on the transmission cycle calculated by the third means. Cordless telephone system. 12. A first step of turning on the power, a second step of searching for the self-control signal transmitted from the self-main unit, and after the second step, the second step of searching for the second control signal. A third step of determining whether or not the private control signal has been received based on the search result of the step; and, after the third step, when it is determined that the signal has been received based on the result of the third step, A fourth step of acquiring transmission cycle information included in the private control signal, and transmitting the public control signal based on the transmission cycle information obtained in the fourth step after the fourth step. A fifth step of setting a cycle to be n (n is an integer of 1 or more) times the transmission cycle of the private control signal, and, after the fifth step, the public service cycle obtained in the fifth step. According to the transmission cycle of the control signal A sixth step of starting transmission of the public control signal using a time slot adjacent to the private control signal, and, if it is determined that the signal cannot be received after the third step, as a result of the third step. Comprises a seventh step of starting transmission of the public control signal by an arbitrary time slot, and an eighth step of shifting to a steady operation state after the sixth step or the seventh step. A communication control method applied to a digital cordless telephone system according to claim 11, wherein: 13. The slave unit, which has received the public control signal and the private control signal transmitted at adjacent timings, includes a slave of the public control signal or the private control signal which is located in front of the public control signal or the private control signal. Turn on the power of the wireless unit of the slave unit a predetermined time further from the leading edge, and the wireless unit of the slave unit at the trailing edge of the public control signal or the private control signal that is located rearward. 8. The digital cordless telephone system according to claim 1, wherein the power supply of the digital cordless telephone system is turned off.