KR20010026679A - Radio apparatus for terminal and base in DECT system - Google Patents

Abstract

PURPOSE: A cordless device for combing a terminal function with a base function in a DECT(Digital Enhanced Cordless Telephone) system is provided to combine the terminal function with the base station function, and to use the combined functions, so as to perform communication between terminals without base stations. CONSTITUTION: A CPU(11) controls entire operation of a cordless device combing a terminal function with a base function in a DECT(Digital Enhanced Cordless Telephone) system. A terminal/base processor(12) stores programs for a terminal and for a base station, and combines the terminal function with the base function to operate the cordless device. A RAM(Random Access Memory)(13) temporally stores data of the CPU(11). An EEPROM(Electrically Erasable Programmable Read Only Memory)(14) stores a setup parameter of the CPU(10). A key scan(15) interfaces with a user by a key button. An LCD(Liquid Crystal Display)(16) outputs data processed from the CPU(10). An RF(Radio Frequency) module(17) converts the data of the CPU(10) into a cordless signal to receive the cordless signal, and converts the received cordless signal into the data to transmit the data to the CPU(10). The first ROM(Read Only Memory)(21) stores the program for the terminal. The second ROM(22) stores the program for the base station. The first logic sum element(23) performs a phase inversion for terminal/base station mode selecting signals to receive the terminal/base station mode selecting signals, and receives control signals for selecting the first and second ROM(21,22) to perform a logic sum for the control signals, then outputs a performed result to the first ROM(21). The second logic sum element(24) receives the terminal/base station mode selecting signals, and receives the control signals to perform a logic sum for the control signals, then outputs a performed result to the second ROM(22).

Description

Radio apparatus for terminal function and base function combined with a diity system {Radio apparatus for terminal and base in DECT system}

The present invention relates to a terminal device and a base function combined wireless device of a digital enhanced cordless telephone system (DECT) system, and in particular, a base station without a base station function by allowing a terminal function and a base station function to be used in a DECT system. The present invention relates to a terminal function and a base function combined wireless device of a DECT system that is suitable for communication between terminals.

In general, DECT is a multiplexing technique that uses two sets of time slots for full-duplex communication, one set for communication from a mobile station (terminal) to a base station, and another set for communication from a base station to a mobile station. The DECT features a channel spacing of 1.728 MHz, a maximum full-duplex data rate of 384 kbps, and features 9 pico-cell frequency reuse patterns. The DECT system is designed for application in office environments with high call demands and is designed to support integrated communications operations. Voice services support business PABXs with single and multiple cells, home phones with intercom capabilities, public telepoint services, and data services include ISDN access and batch file transfers, including telefax, teletext, and videophones. It supports remote terminal service and real time file access. In order to support these applications, the air interface must be flexible, and a high frequency reuse method is required so that a large number of users can be provided with high quality service.

1 is a block diagram of a terminal of a conventional DECT system.

As shown therein, CPU 1 for controlling the overall operation of the terminal; A ROM (2) connected to the CPU (1) for storing a terminal dedicated program; A RAM (3) for temporarily storing data of the CPU (1); An EEPROM (4) for storing setup parameters of the CPU (1); A kisscan (5) connected to the CPU (1) for performing an interface with a user through a key button; An LCD 6 for outputting the data processed by the CPU 1; The RF module unit 7 converts the data of the CPU 1 into a radio signal, receives the radio signal, and converts the received radio signal into data and transmits the data to the CPU 1.

In Fig. 1, CS_ROM is a control signal for selecting the ROM 2 in the CPU 1, CS_RAM is a control signal for selecting the RAM 3 in the CPU 1, and Ad (N) is N addresses. Bus line.

The operation of the conventional apparatus configured as described above will be described in detail with reference to the accompanying drawings.

First, FIG. 2 is a block diagram showing a communication method between terminals shown in FIG.

Thus, when the terminal is powered on, the CPU 1 reads the terminal dedicated program from the ROM 2 and performs a function as a terminal.

In this EPROM 4, parameter values required by the terminal are stored so that basic parameter values are read when the program is running. The parameter stored in the EPI rom 4 can be modified by the user. When the terminal is powered on again, the modified parameter value is read.

On the other hand, to communicate with a terminal with a terminal-specific program, it is possible only through a base station connected to a private exchange or a trunk line.

In particular, the extension communication between terminals is performed by the terminal 1 making a communication request to the base station to form a wireless channel as shown in FIG. This is done by forming a channel. That is, extension communication between terminals is not possible without going through the base station.

However, the conventional terminal having only such a terminal-specific program has a disadvantage in that communication between terminals cannot be performed without using a base station because its function is limited.

Accordingly, the present invention has been proposed to solve the above-mentioned conventional problems, and an object of the present invention is to enable a terminal function and a base station function in a DECT system by using both terminal and communication even in the absence of a base station. The present invention provides a wireless device having both a terminal function and a base function of a DECT system.

1 is a block diagram of a terminal of a conventional DECT system,

FIG. 2 is a block diagram showing a communication method between terminals according to FIG. 1;

3 is a block diagram of a terminal device and a base function combined wireless device of the DECT system according to the present invention;

4 is a block diagram showing a communication method between terminals according to FIG.

FIG. 5 is a block diagram illustrating a measurement method of a cell coverage range shown in FIG. 3.

Explanation of symbols on the main parts of the drawings

11: CPU 12: terminal / base processing unit

13: RAM 14: Y pyrom

15: kiss can 16: LCD

17: RF module 21, 22: first and second ROM

23, 24: first and second logical sum elements

In order to achieve the above object, the wireless device of the terminal function and the base function of the DECT system according to the present invention,

A terminal of a DECT system, comprising: a CPU for controlling the overall operation of a terminal function and a base function combined wireless device of the DECT system; A terminal / base processing unit connected to the CPU and storing a program for a terminal and a program for a base station to process the wireless device to operate by using both terminal and base functions; RAM for temporarily storing data of the CPU; An e-pyrom which stores setup parameters of the CPU; A kisscan connected to the CPU to interface with a user through a key button; An LCD for outputting data processed by the CPU; It is characterized in that the technical configuration consists of an RF module unit for converting the data of the CPU into a radio signal to receive, and converts the received radio signal into data and transmits the data to the CPU.

Hereinafter, an embodiment according to the technical spirit of the terminal function and base function combined wireless device of the present invention as described above is as follows.

Figure 3 is a block diagram of a wireless terminal device combined with a terminal function and a base function of the DECT system according to the present invention.

As shown here, a CPU 11 for controlling the overall operation of the terminal function and base function combined wireless device of the DECT system; A terminal / base processor (12) connected to the CPU (11) to store a program for a terminal and a program for a base station to process a wireless device by using both terminal and base functions; A RAM 13 for temporarily storing data of the CPU 11; An ypyrom (14) for storing setup parameters of the CPU (11); A kisscan 15 connected to the CPU 11 to perform an interface with a user through a key button; An LCD 16 for outputting data processed by the CPU 11; The RF module unit 17 converts the data of the CPU 11 into a radio signal, receives the radio signal, and converts the received radio signal into data and transmits the data to the CPU 11.

The terminal / base processing unit 12 includes: a first ROM 21 connected to the CPU 11 and storing a terminal program; A second ROM 22 connected to the CPU 11 and storing a base station program; The terminal / base station mode selection signal output from the CPU 11 is inputted by reversing the phase, and the control signal capable of selecting the first and second ROMs 21 and 22 is received and logically combined to form the first ROM. A first logical sum element 23 for outputting a logical operation result to (21); The terminal / base station mode selection signal outputted from the CPU 11 is input, and the control signal capable of selecting the first and second ROMs 21 and 22 is input and logically coupled to the second ROM 22. The second logical sum element 24 outputs the logical operation result.

The operation of the terminal function and the base function combined wireless device of the DECT system according to the present invention configured as described above will be described in detail with reference to the accompanying drawings.

First, in the present invention, as shown in FIG. 3, the second ROM 22 having the base station program is added to the first ROM 21 having the terminal program in the block configuration of the conventional terminal (see FIG. 1). The wireless device proposed in the present invention can also serve as a base station. In addition, if the capacity of the ROM is sufficient, an additional ROM is not required, and regions may be used in one ROM.

Thus, when the terminal is powered on, the CPU 11 reads a program from the ROMs 21 and 22 to perform a function, and selects a mode selection parameter value for selecting a terminal function and a base station function stored in the EPROM 14. Is read first, and if the "terminal mode" is selected, the first ROM 21 in which the terminal-specific program is embedded is selected, and if the "base station mode" is selected, the second ROM in which the base station-specific program is embedded is read. Select (22).

A method of selecting the storage device of the first ROM 21 and the second ROM 22 will be described below.

First, the address lines assigned to the first ROM 21 are Ad (1) to Ad (M), and the address lines assigned to the second ROM are Ad (M + 1) to Ad (N) (where M <N). Suppose that the ROM is operating in the "low" state.

If "terminal mode" is selected, the CS_ROM control signal, which is a control signal from which the first and second ROMs 21 and 22 can be selected, is "low", and the CS control signal, which is a terminal / base station mode selection signal, is also "low". The control signals passing through the first and second logic-junction elements 23 and 24 become " low " in the first ROM 21 and " high " Only 21) operates to execute the terminal program stored in the first ROM 21 through the Ad (1) to Ad (M) lines.

In addition, when the "base station mode" is selected, the CS_ROM control signal is "low" and the CS control signal is "high", so that the control signal passing through the first and second logic elements 23 and 24 is the first ROM ( 21 is "high" and the second ROM 22 is "low" so that only the second ROM 22 is operated so that the second ROM 22 is connected via the Ad (M + 1) to Ad (N) lines. The base station program stored in the program is executed.

Therefore, the conventional terminal role and the base station role can be made possible by one wireless device according to the mode selection parameter stored in the Y pyrom 14.

When the wireless device proposed by the present invention is used as a base station (hereinafter referred to as a "base wireless device"), even in a place where an existing base station does not exist, as shown in a block diagram showing a communication method between terminals of FIG. A call can be made between terminals.

In addition, if a plurality of terminals are registered in the base wireless device using the wireless device as a base station, a call can be made between not only the base wireless device and the terminal but also a registered terminal, so that a call between a plurality of users can be made.

5 is a block diagram illustrating a measurement method of a cell coverage range shown in FIG. 3.

Therefore, if the wireless device proposed by the present invention is used, communication between terminals is possible not only in a place where a conventional base station is installed as described above, but also the base wireless device can be used in a cell coverage tool. have.

Here, the cell coverage tool is a device that determines the most appropriate location of the base station by measuring an area for smooth communication between the base station and the terminal, and facilitates installation of the base station. Thus, when making a cell coverage tool using a conventional base station, the DECT system and the base station are connected to each other by wire through a communication line such as a telephone line and thus cannot freely move.

Therefore, when the wireless device proposed in the present invention is used as a base station, as shown in FIG. 5, since a separate communication line is not required, the position can be freely moved, and thus the most suitable position of the base station can be easily found.

In addition, if two or more terminals are registered in the wireless device proposed by the present invention, since the sound quality can be checked when the terminals communicate with each other, it is possible to find an accurate communication area rather than using the reception level.

As such, the present invention enables a terminal-to-terminal communication even in a place where there is no base station by allowing the DECT system to use both a terminal function and a base station function.

Although the preferred embodiment of the present invention has been described above, the present invention may use various changes, modifications, and equivalents. It is clear that the present invention can be applied in the same manner by appropriately modifying the above embodiments. Accordingly, the above description does not limit the scope of the invention as defined by the limitations of the following claims.

As described above, the terminal function and the base function combined wireless device of the DECT system according to the present invention is a communication between the terminals even without a base station is installed even in a place where the base station is not installed or difficult to install, such as outdoors It is possible to be very useful in emergency calls that do not require an exchange system, such as a DECT system, or where the frequency of communication through a conventional DECT system is not high.

In addition, when the present invention is used as a cell coverage tool, it is not necessary to connect with a DECT system by wire, so it is easy to install and find the location of the base station, and voice communication is possible to define a more reliable cell area. It is effective.

Claims (2)

In the terminal of the DECT system, A CPU for controlling the overall operation of the terminal function and the base function combined wireless device of the DECT system; A terminal / base processing unit connected to the CPU and storing a program for a terminal and a program for a base station to process the wireless device to operate by using both terminal and base functions; RAM for temporarily storing data of the CPU; An e-pyrom which stores setup parameters of the CPU; A kisscan connected to the CPU to interface with a user through a key button; An LCD for outputting data processed by the CPU; And a RF module unit for converting the data of the CPU into a wireless signal and receiving the data, and converting the received wireless signal into data and transmitting the data to the CPU. The method of claim 1, wherein the terminal / base processing unit, A first ROM connected to the CPU and storing a terminal program; A second ROM connected to the CPU and storing a program for a base station; A phase inverting terminal / base station mode selection signal output from the CPU, a control signal for selecting the first and second ROMs, and performing a logical sum to output a logical operation result to the first ROM; A logical sum element; A second logical sum element that receives a terminal / base station mode selection signal output from the CPU, receives a control signal for selecting the first and second ROMs, and outputs a logical operation result to the second ROM. Wireless device with a terminal function and a base function of the DECT system, characterized in that configured.