KR20030055561A - WLL terminal having a variable communication circuit function - Google Patents

Abstract

PURPOSE: A WLL terminal having a variable call circuit function is provided to variably control a speech path in order to connect a call channel optimal to a wired phone through a switching unit, and to select the optimal call channel according to characteristics of the wired phone, thereby obtaining stable speech quality. CONSTITUTION: A speech path detector(3) detects each speech path state condition. An MSM(Mobile Station Modem)(4) decides the speech path state conditions, generates an optimal speech path selecting control signal, and entirely controls a function of a WLL terminal. A relay switch(5) controls switching of lines connected to each wired phone(2A-2N). A switching controller(6) controls the relay switch(5), and connects a call line according to the optimal speech path selecting control signal. An SLIC module(8) forms a speech path.

Description

The WLL terminal having a variable communication circuit function {WLL terminal having a variable communication circuit function}

The present invention relates to a Duel Uel terminal having a variable call circuit function, in particular to determine the state of the line connected to a plurality of landline telephones to connect the call channel that is optimal for the landline telephone through the switching means The present invention relates to a UE terminal having a variable call circuit function that selects an optimal call channel according to the characteristics of a connected wireline telephone.

In general, a wireless local loop (WLL) system is a telephone system that wirelessly connects subscriber lines within a distance of about 2-6 [km] from a base station without using a conventional telephone line. Many WLL-type systems have been developed and used, such as satellite systems, fixed microwave systems, cellular technology systems, and cordless systems. Used.

WLL system using this cellular technology can use the same network as cellular mobile phone or PERSONAL COMMUNICATION SERVICE (PCS) and can cover a wider area, making the network more economical. The WLL system is largely divided into a WSC (Wireless Switching Center) for processing a communication signal of a subscriber network transmitted wirelessly, and a plurality of WLL terminals forming a call according to the channel assignment signal of the WSC. In addition, the WLL terminals as described above are divided into separate and integrated terminals.

Then, referring to the conventional detachable WLL terminal as described above with reference to FIG. 1, the RF unit 72 forms a wireless call with the WSC 71 by RF signal processing of a call signal flowing into and out of the WLL terminal 70, and the A mobile station modem (MSM) 73 for modulating or demodulating and outputting a communication signal input and output through the RF unit 72 to a baseband signal, and controlling the overall function of the WLL terminal 70, and the MSM unit 73 Communication between a plurality of wired telephones 75A-N connected to a separate WLL terminal 70 and a codec 74 for converting a digital voice signal input from the digital signal into an analog signal or an analog signal input into a digital signal. An interface unit 76A-N for interfacing a signal, a slick unit 77 connected between the codec 74 and the interface unit 76A-N to supply a call power or transmit a communication signal, and the separate WLL Power supply for supplying the operating voltage of the terminal 70 And a unit (78).

Meanwhile, referring to the operation of the conventional detachable WLL terminal as described above, first, a plurality of wired telephones 75A-N are connected to the interface unit 76A-N of the WLL terminal 70, and then a power cord is connected. Then, the power supply unit 78 of the separate WLL terminal 70 converts the input power voltage and supplies it to each unit. At this time, when making a call using any one of the wired telephones 75A, the slick unit 77 supplies the call power of, for example, -48 [V] to the wired telephone 75A. The communication signal of the wired telephone 75A is interfaced through the interface unit 76A and input to the slick unit 77. Then, the slick unit 77 transmits the input communication signal of the landline telephone 75A to the codec 74. In addition, the codec 74 converts the input analog communication signal into a digital signal and transmits it to the MSM unit 73. The MSM unit 73 modulates the input digital communication signal, processes the RF signal through the RF unit 72, and transmits the received RF signal to the corresponding terminal (not shown) to execute a normal call.

However, in the conventional WLL terminal as described above, since the call power is supplied to all the other wired telephones if any one of the wired telephones connected to the interface unit is reduced, the handset current level is reduced, thereby significantly reducing the call quality of the wired telephone. In addition, the wired telephones attempt to make a call through a single channel with these characteristics ignored, despite differences in their characteristics, such as intrinsic impedance and voltage fluctuations. there was.

Accordingly, the present invention has been invented to solve the conventional problems as described above, by varying the communication path to determine the state of the line connected to a plurality of landline telephones through a switching means to connect the call channel that is optimal for the landline telephones By controlling, the optimal call channel is selected according to the characteristics of the connected landline telephone, and the object is to provide the UE terminal with a variable call circuit function that can ensure a stable call quality accordingly.

Another object of the present invention is to provide a UE terminal having a variable call circuit function that can be connected to a plurality of call channels to a plurality of wired telephones connected, thereby significantly improving the functionality of the WLL terminal.

The present invention for achieving the above object is connected to the communication line of a plurality of landline telephones connected to the WLL terminal connected to each of the call path detection unit for detecting the condition of the call path of each landline, and detected through the call path detection unit The MSM generates the selection control signal for the optimal call of the corresponding landline by judging the call condition of the individual landline, and variably controls the switching of the line connected to the rear end of the call path detection unit. A relay switch, a switching control unit for connecting the optimum call line by controlling the relay switch according to the optimum call path selection control signal of the MSM, and forming a call path connected by the relay switch and meeting characteristics of various wired telephones. Provides a UE terminal with a variable call circuit function including a slick module.

1 is an explanatory diagram illustrating a conventional WLL terminal.

2 is an explanatory diagram illustrating a WLL terminal of the present invention.

<Detailed Description of Codes>

1: WLL terminal 2A-N: Landline

3: currency path detection unit 4: MSM

5: relay switch 6: switching control unit

7A-N: Slick channel part 8: Slick module

9: RF module 10: codec

11: LCD

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

The present invention is connected to the communication line of a plurality of landline telephones (2A-N) connected to the separate WLL terminal 1, as shown in Figure 2 for the call condition of each landline telephone (2A-N), for example, the corresponding wired Call path detection unit 3 for detecting conditions such as impedance characteristics of the phone, voltage fluctuations, and hook-on / off, respectively, and call paths of individual wire phones 2A-N detected through the call path detection unit 3. It is connected to the rear end of the MSM (4) and the call path detection unit (3) for generating the selection control signal of the optimum call of the wired telephone and the overall control of the function of the WLL terminal (1) by determining the condition condition. The relay switch 5 for controlling the switching of the line connected to the landline (2A-N) and the relay switch 5 in accordance with the optimum call path selection control signal of the MSM (4) to connect the call line Connected by a switching control section 6 and the relay switch 5 It includes a slick module 8 having a plurality of slick channel portions 7A-N corresponding to the characteristics of various wired telephones, for example, impedance, voltage, and current characteristics to form a communication path.

One end of the MSM 4 is connected to an RF module 9 for RF signal processing of a call signal flowing into and out of the WLL terminal 1 and transmitting it to a wireless call, and another end of the MSM 4 and a slick. Between the modules 8, a codec 10 for converting an input digital voice signal into an analog signal or converting an input analog signal into a digital signal is connected, and at another end of the MSM 4, a WLL terminal ( The LCD 11 which displays the processing information of 1) by text or graphical information is connected.

Here, each slick channel portion 7A-N of the slick module 8 sets the value in advance in consideration of characteristics of various wired telephones, for example, impedance, voltage, and current characteristics, and sets the setting data to the MSM 4. Enter it.

Next, the operation and effects of the present invention as described above will be described.

First of all, the terminal of the present invention is a channel condition of the plurality of wired telephones 2A-N to which the channel detector 3 is connected, such as impedance characteristics, voltage fluctuations, and hook-on / off conditions. Detect each.

For example, the landline telephones have various impedance characteristics for each country or manufacturer, for example, 600 ± 200 Ω in Korea and 200 Ω in Japan.

Therefore, the call path detecting unit 3 has an impedance characteristic or ring voltage of the telephone 2N when the telephone line 2N using 800 Ω of the plurality of connected telephones 2A-N is hooked off. A noise signal or the like is detected and input to the MSM 4.

Then, the MSM 4 comprehensively collects various state information on the currently hooked-off wireline 2N detected by the call path detecting unit 3, for example, impedance characteristics of 800 Ω or ring voltage and noise signal. Then, it sets the slick channel portion 7A-N of the slick module 8 that best meets the conditions of the hooked-off wireline.

For example, among the slick channel portions 7A-N of the slick module 8, a slick channel portion 7A having 800 Ω and optimally matching the current or voltage characteristics of the landline 2N is set.

Then, the MSM 4 determines the slick channel unit 7A as described above, and then outputs the selection control signal to the switching control unit 6 with the optimum call. Then, the switching controller 6 controls the switching contact of the relay switch 5 according to the selection control signal of the optimum call path of the MSM 4 to optimally set the call line of the currently hooked-off wireline 2N. Variable connection is made to the slick channel portion 7A of the slick module 8.

At this time, when the optimal call path is variably selected as described above, the slick channel unit 7A of the selected slick module 8 supplies the call power of, for example, -48 [V] to the wired telephone 2N. Then, the communication signal of the wired telephone 2N having 800 Ω is input to the corresponding slick channel unit 7A having 800 Ω via the formed optimal call path. Then, the slick channel unit 7A transmits the input communication signal of the wired telephone 2N to the codec 10. In addition, the codec 10 converts an input analog communication signal into a digital signal and transmits the digital signal to the MSM 4. The MSM 4 modulates the input digital communication signal, processes the RF signal through the RF module 9, and transmits the RF signal to the other terminal (not shown) to execute a normal call. At this time, the MSM 4 displays the processing of the call function through the LCD 11 as a display signal.

Meanwhile, in the above description, the hooked-off wireline is limited to only one case. However, the present invention is not limited thereto, and even though a plurality of wireline-telephones are hooked off at the same time, the channel slick unit is optimally provided to them through the same process. Assigning connects the best channel.

As described above, the present invention grasps the state of a line connected to a plurality of landline telephones and variably controls the channel to connect the call channel that is optimal for the landline telephone through a switching means, thereby meeting the characteristics of the connected landline telephone. Since the optimal call channel is selected, it has the advantage of ensuring stable call quality.

In addition, according to the present invention, since a plurality of call channels can be connected to a plurality of connected wired telephones, the functionality of the WLL terminal is also significantly improved.

Claims (3)

A call path detection unit connected to a communication line of a plurality of landline telephones connected to a WLL terminal and detecting call path state conditions of each wire telephone, and determining a call path state condition of an individual wire telephone detected through the call path detection unit. MSM for generating a selection control signal for the optimal call of the landline, relay switch connected to the rear end of the call path detection unit to control the switching of the line connected to each landline, and selects the optimal call of the MSM A variable call, comprising: a switching control unit for controlling a relay switch according to a control signal to connect an optimum call line, and a slick module connected by the relay switch to form a call path in accordance with characteristics of various landline telephones. The BULEL terminal with a circuit function. According to claim 1, The slick module having a variable call circuit function, characterized in that consisting of a plurality of slick channel unit that is set differently in advance in consideration of various characteristics of the wireline telephone. The terminal of claim 1, wherein an impedance characteristic, a voltage change, and a hook-on / off condition are included in a condition of a call line of the wireline.