KR0136732B1 - Method of centraloffice line switching in the parallel handset - Google Patents

Abstract

The present invention relates to a trunk line switching method of a wireless telephone having a number of portable devices. The present invention can improve the quality of the call service because any portable device among a plurality of portable devices can switch the trunk line after the telephone call between the portable devices is negotiated when the trunk line is switched to another portable device during the trunk line call. have.

Description

Trunk Line Switching Method of Wireless Telephone with Multiple Portable Devices

1 is a block diagram of a conventional wireless telephone having a plurality of portable devices.

2 is a block diagram of a wireless telephone having a plurality of portable devices according to the present invention.

3 is a flowchart illustrating a trunk line switching process of a radiotelephone according to the present invention.

* Description of the symbols for the main parts of the drawings *

10,30: Fixed device 20 _{1 to} 20 n, 40 _{1 to} 40 n: Portable device

11, 21, 41: transmitter 12, 22, 42: receiver

13, 23, 32, 43: control unit 31: trunk line circuit

33: Key input section 34 _{1 to} 34 ₄ : RF section

35: handset 36: matching unit

The present invention relates to a wireless telephone having a plurality of portable devices, and in particular, when any mobile device switches a trunk line to another mobile device during a trunk line call, a plurality of mobile telephones can be switched after a telephone call is negotiated between the portable devices. The present invention relates to a trunk line switching method of a wireless telephone having two portable devices.

Conventional wireless telephone is done by having a stabilizer 10 and a plurality of mobile devices (20 ₁ ~20 _n) as shown in FIG. 1. The fixing device 10 includes a transmitter 11, a receiver 12, and a controller 13, and each of the portable devices 20 ₁ to 20 _n has a transmitter 21, a receiver 22, and a controller 23. It is made with a. The portable devices 20 ₁ to 20 _n are modulated / amplified by the transmitter 11 and transmitted to the fixed device 10, and the fixed device 10 is transmitted to the portable devices 20 ₁ to 20 _n . And demodulate / amplify the voice and data from the receiver 12. In addition, the fixing device 10 modulates / amplifies and amplifies voice and data by the transmitting unit 11, and transmits the same to the portable devices 20 ₁ to 20 _n , and the portable devices 20 ₁ to 20 _n are fixed devices 10. And demodulate / amplify the audio and data from the receiver 22. All data transmitted / received between the fixed device 10 and the portable device 20 ₁ to 20 _n always include an ID number, and the data must be identical between the portable device 20 ₁ to 20 _n and the fixed device 10. Process the function by.

Such a radiotelephone operates as follows when switching trunk lines between portable devices 20 ₁ to 20 _n . For example, when the portable device 20 ₁ makes a trunk line call through the fixing device 10 and inputs a hold button to pass the trunk line to the other portable device 20 ₁ to 20 _n , the corresponding data is fixed. It is sent to the (10) side. At this time, when the receiving unit 12 of the fixing device 10 receives the corresponding data and transmits the data to the control unit 13, the control unit 13 transmits the corresponding data to the portable device 20 ₂ through the transmitting unit 11. At this time, the portable device 20 ₂ outputs a ring signal by receiving the corresponding data. Accordingly, when one of the portable devices 20 ₁ to 20 _n responds, the trunk line is switched to the portable device side.

As described above, the conventional radiotelephone is provided with only one RF unit including the transmitter 11 and the receiver 12 in the fixed device 10, and when the trunk line is switched between the portable devices 20 ₁ to 20 _n , the trunk line is suspended. There is a problem that can not provide a good call service because the switch to the CO line without consultation with the called party.

The present invention has been made to solve the above-mentioned problems, and when any mobile device switches the trunk line to another mobile device during a trunk line call, the mobile station can switch the trunk line after calling and negotiating an extension between the portable devices. An object of the present invention is to provide a trunk line switching method for enabling a call service.

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

2 is a block diagram of a wireless telephone having a plurality of portable devices according to the present invention, and FIG. 3 is a flowchart illustrating a trunk line switching process of the wireless telephone according to the present invention.

As shown in FIG. 2, the radiotelephone according to the present invention comprises a fixing device 30 and a plurality of portable devices 40 ₁ to 40 _n . The fixed device 30 includes a trunk line circuit 31 for matching trunk lines, a control unit 32 for controlling the overall operation of the fixed device 30, a key input unit 33 for inputting dial keys and various control keys, voice and and a plurality of the RF portion (34 ₁ ~34 _4), the handset 35 for inputting and outputting voice signals, the RF section (34 ₁ ~34 ₄₎ matching unit 36 for matching with the antenna for transmitting and receiving data. Each of the portable devices 40 ₁ to 40 _n includes a transmitter 41 for transmitting voice and data, a receiver 42 for receiving voice and data, and a controller 43 for controlling overall operations of the portable device. Equipped.

Such a wireless telephone of the present invention, if the trunk line switching between the mobile device (40 ₁ ~40 _n) operates in the player shown in FIG. 3. First, the control unit 32 of the fixing device 30 performs channel scanning to find a good channel through the RF units 434 to 34 ₄ , and the control unit 43 of the portable devices 40 ₁ to 40 _{n also} receives the receiving unit 42. Channel scanning to find a good channel (step 50). At this time, for example, when any mobile device 40 ₁ is inputted with a call key (step 51), the channel is selected to fix ID number, extension number (different setting for each mobile device) and call request data. The control unit 32 of the fixing device 30 is transmitted from the portable device 40 ₁ by using any of the RF units 34 _{1 to} 34 _n , for example, using an arbitrary RF unit 34 ₁ . ID number, extension number, and call request data are received (step 52).

Thereafter, the control unit 32 of the fixing device 30 checks whether or not the trunk line is in use (step 53). When the trunk line is not in use, the control unit 32 transmits the acknowledgment data and ID number to the RF unit 34._OneThrough the handset (40_OneTo the side (step 54), at which time the portable device 40_One) Receives the acknowledgment data and the ID number from the fixing device 30, the fixing device 30 and the portable device 40._OneIs connected to the call path (step 55), and the mobile device 40_One) Is able to make a trunk line call through the fixing device (30). Portable Device (40_OneOf a mobile device (eg.₂In order to switch to the CO line, the user inputs a hold button and the target device for CO line change (40₂Enter the extension number of the mobile device (40)._One) Withholds the CO line in the call, ID number, his extension number, the target device for CO line switching (40₂The trunk line pending data including the extension number of) is transmitted to the fixing device 30 side, and the control unit 32 of the fixing device 30 is the RF unit 34._OneThrough the handset (40_OneTrunk line pending data from ") is received (step 56). At this time, the control unit 32 of the fixing device 30 checks whether there are calls from other mobile devices (step 57), and if there are no calls from other mobile devices, the target device for trunk line switching 40₂Check whether or not the call is busy (step 58). Citation target mobile device (40₂) Is not in a call, the control unit 32 of the fixing device 30 is not in use, for example, the RF unit 34₂Through the handset (40₂The ID number, the extension number, and the call data are sent to the server side (step 59). At this time, the portable device 40₂) Responds by pressing the call key, the mobile device (40₂) Sends a response signal to the fixing device 30 side, the control unit 32 of the fixing device 30 is the RF unit 34₂Through the handset (40₂Receive a response signal from step (step 60). At this time, the control unit 32 of the fixing device 30 is the RF unit 34_One) And RF section (34)₂) To the mobile device (40_One) And handheld devices (40₂The internal communication path between the two (step 61) and the portable device 40_One) And handheld devices (40₂) Through an internal call between users of the_One) User of CO line₂The mobile device (40)_One) Transmits the call termination data to the fixing device 30 side, the control unit 32 of the fixing device 30 is the RF unit 34_One)Through the Portable Device (40_OneReceiving the call termination data from the step (step 62), the RF unit 34_One) To standby mode and the CO line (34)₂) To connect the CO line to the mobile device (40₂(S63). At this time, the portable device (40₂) Talks to the CO line (step 64).

In step 53, when the trunk line is in use, the control unit 32 transmits a signal during a trunk line call to the portable device 40 ₁ through the RF unit 34 ₁ (step 68). The device 40 ₁ is in the standby state (step 67). In addition, in the above-described step 58, the control unit 32 of the fixed device 30 transmits a busy signal to the unit 40 ₁ through the RF unit 34 ₁ when the trunk line switching target portable device 40 ₂ is busy. After sending out (step 69), the process returns to step 56. In step 57, if there is a call from other portable devices, the controller 32 returns to step 56 to perform the operation. If there is no response from the mobile device 40 ₂ called in step 60 described above, the control unit 32 transmits a call signal to the mobile device 40 ₂ for 30 seconds through the RF unit 34 ₂ (step 65). In response to the response from the portable device 40 ₂ (Step 66), if there is a response from the portable device 40 ₂ , the operation of Step 61 is performed, and the portable device 40 ₂ from the portable device 40 ₂ is determined. If there is no response, the flow returns to step 56 to perform the operation. In addition, when the control unit 32 of the fixing device 30 does not receive the call termination data from the portable device 40 ₂ through the RF unit 34 ₂ in step 62 described above, the control unit 32 performs the operation. do.

As described above, the present invention enables the mobile phone to switch the trunk line after negotiating an extension call between the corresponding mobile devices when any of the portable devices switches the trunk line to another mobile device during the trunk line call. Quality can be improved.

Claims (2)

In the trunk line switching method of a wireless telephone having a plurality of portable devices, While the first mobile device makes a call, the fixed device receives the trunk line pending data including the ID number, its extension number, and the extension number of the second mobile device to which the trunk line is to be switched. And a second step of determining whether or not the second mobile device to be transferred is in the call when there is no call from another portable device after the first step, and the second to second steps. If the portable device is not in a call, the fixed device sends an ID number, an extension number of the second mobile device, and a call data to the second mobile device to check whether there is a response from the second mobile device. If there is a response from the second mobile device in the third step, the fixing device comprises a fourth step of connecting a communication path between the first mobile device and the second mobile device; First holiday When receiving the end of the call data for the device from a trunk line switching method of a wireless telephone comprising a plurality of mobile devices comprising: a fifth step, which was converted to the trunk line to the second mobile device. The method of claim 1, In the third step, if there is no response from the second mobile device, the fixed device repeatedly transmits the ID number, the extension number of the second mobile device and the call data to the second mobile device for a predetermined time. A trunk line switching method of a wireless telephone having a plurality of portable devices.