JPS6384326A - Cordless telephone equipment - Google Patents

Abstract

PURPOSE:To ensure the automatic coincidence between using channels of the transmission and reception sides for a cordless telephone equipment of a multi- channel access system, by transmitting a transmission signal after putting an identification code and the channel information into said transmission signal. CONSTITUTION:When a master device 1 receives an incoming call via an outside line, a detection signal is supplied from an interface circuit 13 and a control circuit 10 searches and catches an idle channel via a eynthesizing part 9. Then the circuit 10 reads an identification code out of a program memory 11 in accordance with said idle channel and at the same time generates a code signal to show the using channel. Then the identification code and channel code information are transmitted together with a transmission signal via a MODEM 12, a transmitting part 6, etc. Receiving these information and signal, a slave device moves automatically to a channel indicated by the noncoincident channel code information obtained from comparison between channels caught in a reception waiting mode based on said code information. Thus the wrong reception due to a spurious frequency, etc. is avoided. The transmission carried out to a slave device from a master device is also attained in the same way.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cordless telephone device of multi-channel access type.

(B) Prior art] - In a dress telephone device, the connection between the nfC base unit and the child S is, for example, based on
It used to be connected by a single wireless channel using a frequency of several tens of MHz, but recently 40 MHz was used.
Cordless telephone devices using the 0 MHz or 900 MHz high frequency band and using the so-called multi-channel access system have been developed in order to make effective use of frequencies (see Research and Practical Application Report Vol. 855, No. 2).

In this method, several tens of channels are set as channels to be used, and in order to maintain the stability of the high frequency of several hundred MHz used, a frequency multiplied by the number of oscillation stations used on the crystal oscillator is used. ing.

However, when multiplying the oscillation local wave number of a crystal oscillator using a multiplier, jl! As shown in Figure 5, the output of the multiplier Qυ (11) includes the Sgelius wave as shown in addition to the original multiplied frequency. A Sgelious wave with a frequency far away from n7'c is generated.Actually, it is considerably attenuated due to the filtration time of the filter, but due to the performance of the filter or the shielding characteristics of the circuit, it is not attenuated to a considerable level. There is a case where a sgerious wave remains with the transmission output of
Even on channels other than the official channels that are currently being used, transmission will occur at a considerable transmission level.

On the other hand, on the receiving side, in the standby state, it is detected whether or not the receiver No. 16 is present, and whether the received signal is above a predetermined level? When detected, even if there is a channel with a stronger reception level than 7n, the configuration is such that the detected channel is captured and the reception state is established. Therefore, as described above, when a sgelius wave is transmitted at a considerable transmission level, the receiver may capture the channel on which the sgelius wave is being transmitted and become in a receiving state. In this case, the channel used by the transmitting side and the channel used by the receiver will be in sync, and although communication is possible, there will be problems such as high noise and poor communication quality. Ta.

(C) Problems to be Solved by the Invention The present invention has been made to solve the above-mentioned problems, and it is possible to automatically match the convenient channels of the transmitting side and the receiving unit when they are mismatched. The present invention provides a cordless 1-packing device.

2) Means for resolving the problem t's The present invention is a means of inserting an identification code into the transmission signal and channel information to indicate the channel being used when transmitting on the transmitting side. On the other hand, on the receiving side, the channel captured by detecting the received signal at a predetermined level is compared with the channel fR@ included in the transmission I1 signal, and if they do not match, it shifts to the channel indicated by the channel information. The gold film C is used to control the receiving and directing.

(E) Since the operation and non-invention are configured as described above, the channel captured by the detection of a reception signal of a predetermined level or higher in the °C receiver in the standby state, and the channel n included in the received 16 signals. If the channels indicated by the information do not match, the channel information is shifted to the channel indicated by the channel information and reception is performed, so that the channels used on the transmitting side and the receiving section match, and the best speech quality can be obtained. In addition, by comparing the occupational code included in the received signal with the identification code preset on the receiving IJ side, the connection between the 8 units and the slave unit is established only when it is possible to connect other units. W: Erroneous return connection with the filling machine is prevented.

(to) real m visit A non-inventive embodiment will now be described with reference to the drawings.

The cordless telephone device of the present invention, as shown in FIG.
t4i, the transmitter/receiver unit is driven by the source and the entire inverted 1'
Similarly to a(1), the transmitter/receiver unit Ishimikaku 'tlLCiT
It consists of a portable handset (2) that is powered by a high-performance battery, and also has a storage section (41) formed in the storage area (by placing all the handset (2J), Light of machine (1)'
One circuit is configured to charge the built-in battery of child a (2) using the light terminal (5) of child device (2).

Figure 2 is a diagram showing the composition of acid plasma (1), and (6) is a diagram showing the composition of acid plasma (1).
t (transmits the same ζ to 2J and transmits it, and (7) is a receiver that receives all the signals from child
It is connected to the antenna (8). (9) is a frequency synthesizer unit consisting of n composed of PLL, which is configured to sequentially generate RtR numbers for several tens of channels, and is supplied to the transmitting unit (6) to give n1 carrier IBL; The oscillation frequency must be given (all predetermined frequency signals are supplied to the receiving section (7). ul is a control circuit that controls each section, and a program memory σ in which a processing program is stored in advance) is used.
It is composed of a microprocessor that performs all control according to the V program. In addition, the program memory (111 yen) is set with the job code for confirming the connected handset (2). For the inserter, the code signal is converted into a predetermined frequency a signal and supplied to the transmitter (6), while the identification code transmitted from the handset (2) and the R wave number signal indicating the channel code to be used are It is a modem circuit that receives the signal from the upper receiver 5 (7), demodulates it into a code signal, and supplies it to the control circuit αG.

(13 is an interface circuit that acts to connect the transmitter (6) and receiver (7) to the telephone line 0, and is composed of a hybrid transformer circuit, a circuit i connection relay, an incoming call detection circuit, etc.).

FIG. 6 shows the configuration of the child all (2), and the same functional parts as the main unit (1) are indicated by a dash symbol τ in the figure number of the second factor, and jl! The different parts from the base unit (1) in Figure 2 will be explained. α 勺 is the microphone connected to the transmitter 1 (6), circle is the speaker connected to the receiver (71'), and 4 is the keyboard for entering the dial number manually, and the key signal is the control circuit CL input. The control circuit that detects the dial number drives the dial signal generation circuit, generates a dial signal of a predetermined frequency, and supplies it to the transmitter (6f). Program memo!ItllJ
The job code stored in the device is set to the base unit (1).
The same code as the 5n code is set.

Next, the inventive operation of this configuration will be explained based on the flowchart of FIG. 4.

First, in the reception standby state, the base unit (1) and the slave unit (2)
) are both receivers (n(q5 only operates, control circuit σQa
i is each n synthesizer section (9 bars 99 t-controls, ]
By changing the member frequency kpfr in constant steps,
Channels used in Stella 7' (81) (85)
- In each channel, the seven lines detect the presence or absence of a signal in receiver 1 that is at a predetermined level.

There, there was an incoming call on R machine (11) from outside 1d, and the base machine (1)
The case where all lines are sent to the slave device (2) will be explained below.

When the incoming PEL 4S signal is detected by the snack detection circuit on the interface circuit, and the telegraph detection signal is supplied to the control circuit αG, the control plane w5μO that detected the disturbance is sent to the synthesizer section (9). It controls and captures the available channel code. Next, the control circuit μ that captured the channel used by τ
ω is read out to the identification code stored in the program memory LLIIK, and a code H7 indicating the channel used is generated, which is modulated to a predetermined frequency by the modem circuit W80 and supplied to the transmitter 1d section (6). By supplying the Vc control circuit Uω to the No. 1 transmission unit (6) that instructs incoming calls, the transmission unit (6) performs a transfer technique corresponding to the acquired channel to be used, which is supplied from the synthesizer unit (9). Place the above-mentioned job code, channel code and J signal on the handset (toward antenna (8)).
Send from

On the other hand, all children (in 2J, the main unit (
When the receiver (7) detects a signal r higher than the Pfr constant V pel due to the transmission of 1), the detection No. 13 detects the lltlJXl circuit u
Since the n1 control circuit αd given to A stops the search operation C of the synthesizer section (9f), the reception operation starts on the channel where all the reception 1A signals are detected. Then, step (S2)
When the data from the observation (1) is received, the received 1d signal is demodulated by the modem circuit α and sent to the control plane as an n code signal*
Since the code signal is supplied to A6, the ILT control circuit AT that detects the code signal first generates the identification code stored in the program memory AHC in step (S6) and compares it with the received identification code in 7 lines. I'm sorry jft'L
If it is determined that the signal is from another base unit, the process proceeds to step (S5), controls the synthesizer unit (9ft), starts searching for the next channel, and completely disables the reception signal 1g.

On the other hand, if the identification codes match, step 1c
), and then it is detected whether or not the channel captured by the synthesizer s<9f matches the channel used by the base unit (1) by comparing it with the received channel code. If the channels match and H, proceed to the next processing step, but if the channel is captured and the channel matches, if S, the control circuit U (Stella 7" (86) and controls the synthesizer (9) to shift to the channel indicated by the received channel code.This means that the base unit (1) and slave unit (2) are connected on the same channel.
The control circuit αJ generates a 1#1g signal from the speaker circuit to notify everyone around the handset (2) that there is an incoming call.

Then the person on the handset noticed the #trust, and the keyboard 1 [9'
When you operate and respond, does it respond? The detected control circuit α is
A response 1 is generated and sent from the transmitting unit (61) to the base unit (1). This response signal is received by the receiving unit (7) and the next R?IR (in 11, the control circuit α By driving the interface circuit and closing the relay, the 4th talk line is connected, and the child 1 (2) is connected to the telephone line through the IJt. As a result, a conversation between the caller and the person using the handset (2) becomes possible.

Next, a message is sent from the handset (2)! I will explain when doing t.

When a call operation is performed on the keyboard u5 of the slave unit (2), the IItlJ 1@1 circuit σI that detected the transmitter signal
Then, along with the line connection signal, the program memory ad is sent one after another as described above, and the identification code and channel information indicating the captured channel are placed on the carrier wave and the base unit (
I sent the same C to 1)! 1- Do it.

Then, RdA (1) that received the signal from handset (2) first checks the job code as described above.
Next, after comparing the channel codes to match the used channels, the control circuit αa connects the interface circuit jiH3.
The connection for episode a is closed and the connection for episode 1 is completed.

After connecting the line and confirming that the dial tone from the switching machine was returned and that it was emitted by the speaker shout of the handset (2), manually dialed the dial number that was emitted from the cow board shout. The control time when the number is detected %u(1') drives the dial signal generating circuit a''re and sends RfR via the transmitter (6).
Send to (1). This dial signal is received by the receiver (7) of the plant aI(υ) and sent to the exchange via the interface circuit C1l, thereby calling the other party. becomes possible.

()J Effects of the Invention As described above, the cordless telephone device of the present invention, in the multi-channel access system, transmits channel information indicating the channel to be used from the side that first starts transmission from the base unit or the slave unit, In the receiving section, if the received channel information differs from the sent channel information, the receiving section is configured to shift to the channel whose channel information is incorrect and then make a call. This system does not have to conduct the entire call on a channel different from that of the transmitter, and the best call quality can be obtained, which is extremely effective in practical use.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the external components of the goadless telephone device of the present invention, Fig. 2 is a block diagram showing the configuration of the base unit, Fig. 3 is a block diagram showing the configuration of the slave unit, Fig. N4 is the Nz diagram, and Fig. The operating state in Figure 3? The flow chart shown in Figure 5 is as shown in Figures 2 and 3.
FIG. 2 is a block diagram showing a part of the transmitter shown in the figure. Nobube, (9ha9/...)
...IlI control circuit, bad...program memory% aaai...modem circuit, Uri...inter-7
Eine circuit, shout... middle board. Takuji Nishino (1 other person), private patent attorney representing Sanyo Electric Co., Ltd. Figure 1 (b) Figure 5 Zub 1j Ass M #fly Figure 2 Figure 3 Figure 4 Gorin ON →1 Iδ? Missing in NS! rma'/winter 1 s5 Teichiriari fortune-telling S2 Beggar 7jisu time-N

Claims (1)

[Claims] (1) A base unit that has a built-in transmitter and receiver and is connected to a telephone line,
In a multi-channel access type cordless telephone device consisting of a base unit and a handset connected via multiple wireless channels, means for transmitting channel information indicating a used channel to each of the base unit and handset, and waiting for reception. means for detecting a match between the channel captured by detecting the received signal and the sent channel information; and when a match is not detected by the means, controlling to shift the receiving channel to the channel indicated by the channel information. What is claimed is: 1. A cordless telephone device, comprising means for transmitting channel information from the side that has started transmission, and controlling the receiving section to match the channel indicated by the channel information.