KR20000026095A - Apparatus of changing speaking channel in spread-spectrum cordless telephone - Google Patents

Abstract

PURPOSE: An apparatus of changing a speaking channel in a spread-spectrum cordless telephone is provided in which a telephone user can change the speaking channel manually when the user senses a noise on the phone. CONSTITUTION: An apparatus of changing a speaking channel in a spread-spectrum cordless telephone comprises: a radio frequency module for transmitting and receiving data to and from a telephone set by establishing the speaking channel according to inputted speaking channel information; a spread spectrum module for spreading data transmitted/received through the radio frequency module and transmitting/receiving to and from a hand set; a channel control key; a microcomputer for applying a speaking channel reestablished by the driving of the channel control key to the radio frequency module as the speaking channel information and transmitting the speaking channel information through the radio frequency module to the telephone set after spreading the spreading channel information applied to the spread spectrum module.

Description

Device for changing call channel in spread spectrum wireless telephone

The present invention relates to a spread spectrum wireless telephone, and more particularly, to an apparatus for changing a call channel in a spread spectrum wireless telephone capable of manually changing a call channel during a call with a main body.

Wireless telephones are being developed in the spread spectrum method through the initial analog communication method. In the early analog type cordless telephones, there were about 10 channels between the main unit and the hand set, and they were configured to communicate with analog signals. There has been a problem that crosstalk with a cordless telephone may occur.

In order to solve such a problem, a digital wireless telephone has been developed, but a general digital wireless telephone uses a relatively high frequency band, thereby limiting communication power and thus limiting a talkable distance.

It is a spread spectrum wireless telephone that solves this problem, and the spread spectrum wireless telephone can extend the communication power by employing the spread spectrum scheme as its name, and can extend the communication distance.

On the other hand, in a spread spectrum wireless telephone, a plurality of channels for mutual communication between a handset and a main body are set, and one of these channels is set as a communication channel, and communication between the handset and the main body is established through this communication channel. Is done. However, during communication through the communication channel, noise may be introduced into the communication channel due to an external environment, that is, an operation of an external device, and thus, a call state may be deteriorated.

In this case, the conventional spread spectrum wireless telephone is configured to automatically change the communication channel during a call. That is, the conventional wireless telephone is configured to monitor the state of the signal transmitted and received through the call channel, and to automatically change the call channel to another channel when the noise ratio of the signal is equal to or greater than a predetermined threshold value. However, in such a device, since the call channel is changed according to the set threshold, the noise ratio of the signal is high when the threshold is set high, and in this case, the user cannot smoothly talk. That is, the threshold value is set to a value that allows a normal user to make a smooth call, and there may be a user who is sensitive to noise, and such a user may have a problem that a smooth call may not be possible with a conventional device.

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and an object of the present invention is to provide an apparatus for changing a call channel in a spread spectrum wireless telephone, which enables a user to manually change a call channel when a user feels that the noise is high during a call. have.

The present invention for achieving the above object is a handset of a spread spectrum wireless telephone that performs wireless communication through a predetermined communication channel with the main body, and establishes a communication channel according to the input communication channel information to transmit and receive data with the main body. An RF module; A spread spectrum module for spreading data transmitted and received through the RF module and decoding the spread signal to input and output to the handset; A channel adjustment key; According to the driving of the channel adjustment key, the communication channel is newly set up and applied to the RF module as the communication channel information, and the communication channel information is applied to the spread spectrum module and has a microcomputer to transmit to the main body through the RF module after the spread.

1 is a schematic block diagram of an apparatus for changing a call channel in a spread spectrum wireless telephone according to the present invention;

2 is a flowchart of operation of a microcomputer configured in a call channel changing apparatus in a spread spectrum wireless telephone according to the present invention.

<Description of the symbols for the main parts of the drawings>

1: RF Module 2: Spread Spectrum Module

3: micom 4: handset

5: channel adjustment key

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 is a schematic block diagram of a handset constituting a wireless telephone according to the present invention, where 1 denotes an RF module, and the RF module 1 is determined according to channel information from the microcomputer 3 described later. It is configured to set a communication channel and communicate with the main body of the radiotelephone via this communication channel.

That is, the RF module 1 modulates data from the spread spectrum module 2, which will be described later, into a communication channel and transmits the data to the main body, and receives and modulates data from the main body applied through the communication channel. It is configured to apply to.

As described above, the spread spectrum module 2 is connected to the RF module 1, which spreads the voice data from the handset 4 and the data from the microcomputer 3 to spread the RF module 1. The signal is applied to (1) while the signal is decoded in its original state while being diffused from the RF module 1, and applied to the handset 4 and the microcomputer 3.

That is, the spread spectrum method refers to a method of spreading and transmitting one data with a plurality of PN codes. The spread spectrum 2 spreads data using a PN code or returns a spread signal to its original state. Decoding process.

Therefore, the general user can transmit and receive voice information with the main body through the handset 4, and since the main body is connected to the telephone line, the user can eventually make a telephone call through the handset.

This spread spectrum module 2 can be implemented with SS1101C of SILICONIANS.

The spread spectrum module 2 and the RF module 1 are connected to the microcomputer 3, respectively, and a predetermined channel adjustment key 5 is connected to the microcomputer 3 in addition. Here, the RF module 1 can detect the noise ratio from the signal received through the antenna, and the spread spectrum module 2 can detect the noise ratio using the corresponding state of the signal from the RF module 1 and the PN code. Can be.

The microcomputer 3 uses the noise ratio information to determine whether to change the communication channel as described below. When the communication channel is changed, the microcomputer 3 transmits this information to the main body (not shown) through the spread spectrum module 2, and RF. Change and set the call channel of the module (1).

Here, the microcomputer 3 can use both the noise ratio information of the RF module 1 and the spread spectrum module 2, or can use only any one of them. It will be easy to see.

In addition, the microcomputer 3 of the present invention monitors the driving state of the channel adjustment key 5, and when the channel adjustment key 5 is driven, the communication channel is changed and the changed communication channel information is transferred to the spread spectrum module ( It transmits to the main body which is not shown through 2), and changes and sets the communication channel of the RF module 1. As shown in FIG.

2 shows an operation flowchart performed by the microcomputer 3 in the handset having the above-described configuration.

As shown, the microcomputer 3 determines whether the current state is in communication with the main body through the communication channel (S1), and inputs a noise ratio from the RF module 1 and / or the spread spectrum module 2 if the communication is in progress. (S2). Then, the microcomputer 3 determines whether the input noise ratio is equal to or greater than the predetermined threshold value (S3) and proceeds to step S4 if the threshold value is greater than or equal to the threshold value, and proceeds to step S5 if it is less than the threshold value.

If the process proceeds to step S4, the noise introduced through the current communication channel is equal to or greater than the preset threshold, and thus the communication state is poor. Therefore, the microcomputer 3 changes the communication channel and displays the changed communication information. It transmits to the main body which is not shown through the spread spectrum module 2, and changes and sets the communication channel of the RF module 1. As shown in FIG.

However, if the process proceeds to step S5, the noise flowing through the current communication channel is below a preset threshold, which means that the call state is good. However, in this case, the call state is determined by the threshold value, and as described above, the user may determine that the call state is poor due to noise. When it is determined that the call state is bad in this manner, the user drives the channel adjustment key 5. That is, the microcomputer 3 determines whether the channel adjustment key 5 is driven in step S5. If the channel adjustment key 5 is driven, the microcomputer 3 proceeds to step S6 to change the call channel and changes the changed channel. The communication information is transmitted to the main body (not shown) through the spread spectrum module 2, and the communication channel of the RF module 1 is changed and set.

As described above, in the present invention, a separate channel adjustment key is set, and when the user is in a bad state during the call using the handset, the user can make a good call by changing the channel by driving the channel adjustment key.

As described above, according to the present invention, the user of the wireless telephone can change the call channel as needed, thereby maintaining a good call state according to the user's judgment.

Claims (2)

A handset of a spread spectrum wireless telephone that performs wireless communication with a main body through a predetermined communication channel, An RF module (1) for transmitting and receiving data to and from the main body by setting a communication channel according to the input communication channel information; A spread spectrum module (2) for spreading data transmitted and received through the RF module (1) and decoding the spread signal to input and output to the handset (4); A channel adjusting key 5; After the channel adjustment key 5 is driven, a new communication channel is set and applied to the RF module 1 as the communication channel information, and the communication channel information is applied to the spread spectrum module 2 to spread the RF signal. A communication channel changing apparatus in a spread spectrum wireless telephone having a microcomputer (3) for transmitting to the main body through a module (1). The RF module (1) and / or spread spectrum module (2) of claim 1 is configured to detect a noise ratio of a signal received on the RF channel (1) and apply it to the microcomputer (3), the microcomputer (3) sets the communication channel newly when the noise ratio is equal to or greater than a predetermined threshold value and applies it to the RF module 1 as the communication channel information, and applies the communication channel information to the spread spectrum module 2 to spread it. And a communication channel changing apparatus in a spread spectrum radiotelephone configured to transmit to the main body via an RF module (1).