JP2829456B2 - Cordless telephone equipment - 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 device provided with a wireless transmission / reception unit in a master unit and connecting a plurality of slave units via the wireless transmission / reception unit and a wireless line.

[0002]

2. Description of the Related Art A conventional cordless telephone device of this kind is:
For example, when an incoming call arrives at a telephone line accommodated in a base unit, incoming data is transmitted from the base unit to a plurality of slave units via a wireless line, and a local line ring tone is transmitted from a speaker of the slave unit. I have to. In this case, when any slave presses the talk key or when any slave is taken out of the charger, the talk key data or off-hook data is transmitted from the slave to the master via the wireless line, and The device receives these data, closes the telephone line, and responds to the incoming call.

[0003]

In a conventional cordless telephone apparatus, when, for example, incoming call data is transmitted from a base unit to a selected base unit, an acknowledgment (ACK) signal from the base unit is not returned. Ignores this, selects the next slave unit, and transmits incoming call data in the same manner. For this reason, when the slave unit is installed in an environment where communication disturbance is likely to occur due to noise or the like, there has been a problem that data transmission is not reliably performed and a call loss rate is significantly increased.

[0004]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a method for transmitting data to all the slaves at the time of data transmission to a master,
To the slave unit that does not return a confirmation signal for the transmission of this data
Transmitting means for performing retransmission processing for retransmitting data, a counter which is counted when a confirmation signal from the slave unit cannot be received during the transmission processing, and retransmission according to the count value of the counter during the retransmission processing Determine the number of times and wait until the confirmation signal
And resending means for resending data with the number of retransmissions as an upper limit .

[0005]

[Action] After the master unit is performing the transmission process of transmitting the sequential data for all of the handset at the time of transmission of data, this data
Data to the slave unit that does not return a confirmation signal
In addition to executing the retransmission processing to transmit, when the confirmation signal from the slave unit is not received during the transmission processing, the counter is counted, and at the time of the retransmission processing, the number of retransmissions is determined according to the count value of the counter, and the confirmation signal is transmitted. Resend until received
Retransmit the data up to the number of times .

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a cordless telephone device according to the present invention. In FIG.
It is composed of a master unit 1 and a plurality of slave units 30A and 30B, of which the master unit 1 is configured as follows. That is, 5 is a CPU, 10 is a DC loop of the telephone line L, a loop for detecting reversal and a reversal detection circuit, 11 and 13 are diode bridges, 12 is an incoming call detection circuit, and 14 is a loop closing and DP dial signal. A transistor for sending out, 15 is a communication circuit, 16 is an IDROM for storing an ID code of the base unit 1 which is composed of an electrically rewritable EEPROM or the like, 17 is a hook switch, 18 is a key comprising various keys Reference numeral 19 denotes a display unit, 20 denotes a tone ringer that sounds a ring tone, and 21 denotes a speaker.
Reference numeral 22 denotes a dial IC for generating the above-mentioned DP dial signal or PB dial signal.
A PB receiver for receiving a B dial signal; 24, a cassette mechanism for recording and reproducing voice signals; 25, a line signal detector for detecting various signals such as dial tone and busy tone from the telephone line L; A voice IC for sending a voice message to the telephone line L, 27 is a slave 30A,
A wireless transmission / reception unit that communicates with the 30B via a wireless line, 2
Reference numeral 8 denotes a wireless receiving unit that detects incoming jamming radio waves, and 29 denotes an amplifier.

The slave units 30A and 30B have the same configuration, and are configured as follows. That is, 31 is a wireless transmission / reception unit that communicates with the base unit 1 via a wireless line, 32
IDROM, which comprises an electrically rewritable EEPROM or the like and stores the ID code of the slave 30,
Reference numeral 3 denotes a key unit including various keys; 34, a CPU; 35, a tone ringer for sounding various ring tones such as ringtones;
36 is a speaker, and 37 is an amplifier.

In such a cordless telephone device,
When an incoming call arrives at telephone line L accommodated in base unit 1, C
PU5 detects this incoming call via the incoming call detection circuit 12,
The wireless transmitting / receiving unit 27 first transmits incoming call data to the slave unit 30A via the wireless line including the antenna A1, and receives an acknowledgment (ACK) signal indicating the reception of the incoming call data returned from the slave unit 30A. . When this confirmation signal is received, the next slave unit 30B is selected and the incoming call data is transmitted in the same manner, but if the confirmation signal is not received within a predetermined time, the error counter of the slave unit is set to 1 After that, the incoming call data is transmitted to the next slave unit. Note that the value of the error counter defines the number of retransmissions when the incoming call data is transmitted to the child device at the time of the next incoming call.

When the incoming call data is transmitted to each slave unit, the CPU 34 in the slave unit 30 sends the confirmation signal to the master unit 1
And the tone ringer 35 is driven to cause the speaker 36 to transmit a local ringing tone. Thereafter, when a call key or the like in the key unit 33 is pressed in any of the slave units, this is detected by the CPU 34, and the wireless transmission / reception in the master unit 1 is performed via the wireless line, that is, the wireless transmission / reception unit 31, the antenna A2, and the antenna A1. The call key data is transmitted to the unit 27. Upon receiving the call key data, the CPU 5 in the base unit 1 returns local ringing stop data to each slave unit via a wireless line to stop ringing of the local line ring tone, and also through the dial IC 22. Then, the transistor 14 is turned on to close the loop of the telephone line L and respond to the incoming call. In this way, a call is started between the calling party and the called party of the slave unit.

Next, FIG. 2 is a flowchart showing the operation of the CPU 5 in the master unit 1 for performing data transmission with each slave unit via a wireless line. In step 100, it is determined whether an incoming line signal arrives at the telephone line L. If the incoming line signal arrives, the first timer (4 seconds) is started in step 101, and the child timer is subsequently started in step 102. The slave of the machine number 1 (the slave 30A in the present embodiment) is selected.

Next, in step 103, an incoming call signal (incoming call data) is transmitted to the selected slave unit via the control channel on the radio line. In step 105, the second timer (0.2 seconds) is started. Thereafter, the reception of the confirmation signal from the slave unit and the time-up of the second timer are determined in steps 106 and 107, respectively. If the confirmation signal is received within the time-out of the second timer, step 108 is performed. Then, the error counter is reset to “0”, and when the second timer times out without receiving the confirmation signal, the value of the error counter of the child device is increased by one and the value of step 110 is increased. Judgment of termination of all slave units is determined. When it is determined that the end of all the slaves in step 110 is “N”, the next slave (the slave 30B in this embodiment) is selected, the process returns to step 106, and the same processing as described above is executed. In addition, when the transmission of the incoming call signal to the slave units 30A and 30B is completed and “Y” is determined in step 110, the process proceeds to step 120 to select the slave unit 30A again.

When the slave 30A is selected in step 120, it is checked in step 121 whether the error counter value of the slave is "0". If the error counter value is "0", the process proceeds to step 121. For example, it is determined that the incoming call signal has already been transmitted to the child device, and the process proceeds to step 130 to determine the termination of all the child devices. If a confirmation signal for the incoming call signal is not returned from the child device in the previous incoming call or the current incoming call and the value of the error counter is integrated and it is determined that the value is not "0", the error counter is determined in step 122. Check whether the value of is less than a predetermined value. In this case, if the value of the error counter is determined to be less than or equal to the predetermined value, an incoming call signal is transmitted to the slave unit via the control channel in step 123, and after completion of the transmission is confirmed in step 124, the process proceeds to step 130. I do.

If the value of the error counter is equal to or greater than a predetermined value, the transmission counter of the slave unit provided separately is increased by one (step 125), and at step 126, a call is received to the slave unit via the control channel. When a signal is transmitted and the end of the transmission is confirmed in step 127, step 1
At 28, a second timer (0.2 seconds) is started. afterwards,
The reception of the confirmation signal from the slave unit and the time-up of the second timer are determined in steps 129 and 132, respectively. If the confirmation signal is received within the time-out of the second timer, the process proceeds to step 130. Then, it is determined that transmission to all the slave units has been completed. If the second timer times out without receiving the confirmation signal, it is determined in step 133 whether or not the value of the transmission counter of the slave has reached a predetermined value. For example, the time-up of the first timer started in step 101 is determined in step 134.

In this case, if the first timer has not timed out and the result of the determination in step 134 is "N", the flow proceeds to step 125, where the transmission counter is increased by one and a call is received to the slave unit. Send the signal again. Further, if the first timer times out without the transmission counter of the slave unit reaching the predetermined value, the control channel cannot be occupied for a longer time, so that the retransmission of the incoming call signal to the slave unit is terminated and the next time. Move to the processing of. Further, retransmission of the incoming call signal to the slave units is repeated, and as a result, when the value of the transmission counter reaches a predetermined value and is determined to be “Y” in step 133, the process proceeds to step 130 and all the slave units are called. It is determined whether or not a call signal has been transmitted. When this is determined to be “N”,
In step 131, the next slave unit (slave unit 30B) is selected, and the process returns to step 121 to set the error counter of this slave unit to "0".
Check if it is.

As described above, when data is individually transmitted to each slave unit at the time of incoming of the office line, and no confirmation signal is obtained from the slave unit, the error counter is counted and the value of the error counter is set to a predetermined value. When the value reaches the value, the data is retransmitted to the slave unit a predetermined number of times from the next incoming call. Note that the maximum value is set in advance for the value of the error counter. When the maximum value is reached, the counting is stopped, and the value of the error counter is displayed by the display unit 19 or the like by a predetermined operation or predetermined operation of the base unit 1 or the like. Can also be displayed. Further, in the present embodiment, the parent device 1 to the child devices 30A, 30B
Although the number of data retransmissions is determined in accordance with the value of the error counter when data is transmitted to, the present invention can be applied to data transmission from the child device 30 to the parent device 1. Further, in the present embodiment, two child devices 30
A and 30B are accommodated, but the present invention is not limited to this, and three or more slave units can be accommodated.

[0016]

As described above, according to the present invention, when transmitting data, the master executes transmission processing for sequentially transmitting data to all slaves, and then confirms the transmission of this data.
In addition to executing a retransmission process of retransmitting data to the slave unit to which no signal is returned, if a confirmation signal is not received from the slave unit during the transmission process, the counter is counted, and according to the count value of the counter during the retransmission process. Determine number of retransmissions
However, since the data is retransmitted up to the number of retransmissions until the confirmation signal is received , even if the slave unit is installed in an environment where communication disturbance is likely to occur due to noise or the like, the data is reliably transmitted. It is transmitted, which has the effect of improving the call blocking rate.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the operation of the apparatus in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 master unit 5, 34 CPU 12 incoming call detection circuit 14 transistor 15 communication circuit 18, 33 key unit 19 display unit 20, 35 tone ringer 22 dial IC 27, 31 wireless transmission / reception unit 28 wireless reception unit 30A, 30B slave unit A1, A2 antenna L telephone line

Continuation of front page (56) References JP-A-2-42846 (JP, A) JP-A-62-24722 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04Q 7 / 00-7/38 H04B 7/24-7/26 102

Claims (1)

(57) [Claims] 1. A master unit having a wireless transmission / reception unit, and a plurality of slave units connected to the wireless transmission / reception unit via a wireless line, wherein the master unit and the plurality of slave units are connected via the wireless line. A cordless telephone device that performs data transmission between the master device and the base device, after performing a transmission process of sequentially transmitting data to all the child devices at the time of data transmission,
Resend data to slave unit that does not return confirmation signal
And transmitting means for performing that retransmission processing, a counter the confirmation signal from the slave unit during the transmission process is counted if it can not receive, the number of retransmissions determined in accordance with the count value of the counter at the time of the retransmission processing, Until receiving the confirmation signal
A cordless telephone device comprising: retransmission means for retransmitting data with the retransmission count as an upper limit .