KR0132152B1 - Method of channel swithing in the wirless phone - Google Patents

Abstract

The present invention relates to a wireless key phone system having a plurality of portable devices. When a channel occupancy signal required to perform a call is detected from a specific portable device, interference of the call is selected by occupying a remote channel from another channel in use. It is to be excluded.

According to the present invention, each mobile device detects the occupied state of a channel and stores it in a memory means. When a call request signal of a user is detected, the stored channel data is compared and analyzed to select a remote channel from a channel used by another mobile device. Since the interference is eliminated and no crosstalk occurs, it provides a good call quality.

Description

Channel Selection Method of Wireless Key Phone System

1 is a block diagram of a main device and a portable device of a general wireless key phone system.

2 is a flowchart illustrating channel selection of a wireless key phone system according to the present invention.

＊ Explanation of symbols on main parts of drawing

10: main unit 11: control unit

12A-12N: RF 20A-20N: Portable Device

21: transmitter 22: receiver

23: control unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless key phone system having a plurality of portable devices. Particularly, when a channel occupancy signal required for conducting a call is detected from a specific portable device, the call is selected by occupying a remote channel from a channel in use. The present invention relates to a channel selection method of a wireless key phone system for excluding interference.

As can be seen in the accompanying drawings, Figure 1, a general wireless key system, the main device 10 and a plurality of portable devices (20A-20N), the main device 10 is a carrier is not detected for the call request By selecting and occupying the channel, the controller 11 controls overall operation of the connection of the trunk line and the extension line or the call of the extension line and the extension line, and connects the wireless channel with a plurality of portable devices 20A-20N to provide voice and data signals. And a plurality of RF units 12A-12N for transmitting and receiving, the portable apparatus 20A-20N includes a transmitter 21 for transmitting a voice signal and a data signal to a host device 10 through an occupied wireless channel, And a control unit 22 for receiving and processing data signals and voice signals applied through a wireless channel occupied by 10), and a control unit 22 for controlling overall operations of the portable devices 20A-20N such as channel occupancy. Lose.

In the conventional wireless key phone system as described above, each mobile device 20A-20N selects and occupies a plurality of channels in use by occupying a plurality of RF units 12A 12N of the main device 10. 10 and each of the portable devices 20A and 20N, when the channel occupancy request signal for conducting a call from a specific portable device 20A-20N is detected in the standby state, the main device 10 and the portable devices 20A-20N. The portable device 20A-20N which has requested a channel occupancy with the main device 10 by scanning a plurality of channels set in the multi-channel and detecting a carrier for a call. ).

In such a conventional wireless key-phone system, the channel selection between the main device and the portable device is selected and occupied in close proximity to each channel since only the carrier for the call is selected from the allocated channels. Therefore, when the mobile device is in a call at a close distance from the main device, an error occurs in data transmission and reception due to interference between channels, and noise and crosstalk are generated in the transmitted and received voice call, thereby degrading the quality of the call.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and an object thereof is to detect a channel occupancy request signal from a specific portable device in a state of storing a channel occupied and used by each portable device in channel selection of a wireless key phone system. In this case, it compares and analyzes the channels in use to select and occupy the remotely located channels from the channels in use so as to provide high quality call service by eliminating errors and confusion caused by interference between channels.

In order to achieve the above object, a feature of the present invention is that in a wireless key phone system, each mobile device connected to the main device scans the main device and the assigned channel to detect channel data occupied by another mobile device. After detecting the channel occupancy request signal of the portable device user after performing the first process and the first process of storing the predetermined memory means, the channel data stored in the memory means is compared and analyzed to select a predetermined occupation channel, and then the other portable apparatus. A second process of redetecting whether a channel is in use, and if the occupied channel is not used by another portable device in the second process, is this channel far away from the channel being used by the other portable device? A third process of detecting whether or not a channel is far away from the third process, A fourth process of transmitting the telephone number and the ID number of the portable apparatus to the main apparatus side, and the portable apparatus ID number transmitted in the fourth process is set in the main apparatus, and the other party's telephone number is transmitted through the trunk line to connect the call path. It provides a channel selection method of a wireless key-phone system comprising a five process.

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

2 is a flowchart illustrating channel selection of a wireless key phone system according to the present invention.

As can be seen in the figure, the present invention is that each of the portable devices 20A-20N connected to the main device 10 is configured to use the entire radio channel allocated between the main device 10 and the portable devices 20A-20N in the standby state. It scans (step 101) and analyzes whether or not there is a channel occupied and occupied by other portable devices 20A-20N by detecting the carrier (step 102). If the carrier for the channel occupied and occupied by the other portable apparatuses 20A-20N is not detected in step 102, the portable apparatus 20A 20N maintains the standby state (step 112) and the other portable apparatuses 20A-20N When the carrier detects a carrier for a channel occupied and stored, data for the detected channel is stored in the memory means (step 103). Thereafter, it is analyzed whether or not a signal for requesting possession of the trunk line is detected in order for the user of the specific portable apparatus 20A-20N to make a call with the trunk line or the extension (step 104). In step 104, when a signal for requesting trunk line occupation is detected, the carrier data stored in the memory means is analyzed to select a channel remote from a predetermined channel in use where the carrier is detected (step 105). The carrier state of the selected channel is reconfirmed (step 106). In step 106, the specific portable apparatus 20A-20N occupies and redetects whether or not the channel is located far from the channel in use (step 107). In step 107, if it is detected as a remotely located channel from the channel being used, the other party's telephone number and the number of the mobile device 20A-20N for the call connection through the occupied channel are occupied by the main device 10. The other party's telephone number is transmitted to the trunk line through the main apparatus 10 (step 108). After detecting whether the CO line is busy (step 109), if the CO line is busy, the busy tone is sent to the handset of the mobile device that attempted to make the call (step 113). When a response signal is detected from the other party in the state, the call path is connected (step 110) (step 111). Therefore, the user of the mobile device is provided with a good call quality without call interference.

As described above, according to the present invention, each portable device connected to the main device detects the occupied state of the main device and the allocated channel, and stores the stored data in the memory means and stores the channel data stored in the memory means from which the user's call request signal is detected. By analyzing and selecting and occupying the distant channel from the channel in use, the interference is eliminated by eliminating frequency interference in the call, so the reliability is improved by providing good call quality.

Claims (2)

A wireless key system, comprising: a first process in which each mobile device connected to a main device scans a main device and an assigned channel, detects channel data occupied by another mobile device, and stores the data in a predetermined memory means; When the channel occupancy request signal of the portable device user is detected after performing the first process, the channel data stored in the memory means is analyzed and selected to select a predetermined occupation channel, and then redetecting whether or not the other portable device is in use. And a second step of detecting whether the channel is remote from the channel that the other portable device is in use, if the channel is occupied by another portable device in use of the second step; If the channel is far away in step 3, occupy the selected channel and send the other party's phone number and mobile device ID number to the host device. And a fifth process of setting a portable device ID number transmitted in the fourth process to a host device and a counterpart phone number transmitted through a trunk line to connect a call path. Channel selection method. The channel of a wireless key phone system according to claim 1, wherein if the channel selected in the third process is a channel adjacent to a channel occupied by another portable apparatus, the second process selects a new channel. How to choose.