KR19990003245A - How to set up auto link in next generation digital cordless phone - Google Patents

Abstract

The technical field to which the invention described in the claims belongs.

The present invention relates to a link setting method in a next generation digital wireless telephone.

I. The technical problem that the invention is trying to solve

The present invention provides a method for automatically establishing a link in a next generation digital cordless telephone.

All. Summary of Solution of the Invention

A method for establishing a link with a base station in a next generation digital radiotelephone, comprising: a first process of transmitting a signal requesting link setting of a possible channel to the base station; and acknowledging the link establishment within a predetermined time after performing the first process. If the signal is not input from the base station is characterized in that it consists of a second process of performing the first process again after a predetermined time delay.

la. Important uses of the invention

Used for link establishment in next generation digital cordless phones.

Description

How to set up auto link in next generation digital cordless phone.

The present invention relates to a method for establishing a link in a next generation digital wireless telephone, and more particularly, to a method for automatically establishing a link.

With the development of mobile communication technology, digital wireless telephones have emerged and are used. Second generation cordless telephones (hereinafter referred to as CT-2) are capable of making calls within 200 meters of the location of these telepoints through a public base station called a telepoint. Make it possible. CT-2 is the same in terms of handset and private base station compared to conventional cordless phones (CT-0 and CT-1), but it is called telepoint according to cell concept. It can also be used as a public base station, providing superior functionality over existing cordless phones (CT0, CT1). In addition, a digital cordless phone that performs a wireless call function by adding a wireless pager to the CT-2 is referred to as a CT-2 plus.

As is known, the CT-2 conforms to the standard standard CAI (Commom Air Interface) protocol, and adopts the FDMA / TDD (Frequency Division Multiple Access / Time Division Duplex) method.

1 is a schematic diagram of a next generation digital wireless telephone system.

Referring to the drawings, reference numeral 1 denotes a base station of a next generation digital radiotelephone system, and 2 denotes a CT-2.

2 is a flowchart illustrating a call setup process in a next generation digital wireless telephone.

The call setup is a dial tone is generated through the link setup and authentication (authentication) process, the call is possible, and the call setup is briefly described because it is known in the CAI protocol.

CAI is largely divided into a radio interface unit and a communication signaling protocol. Here, the radio interface unit relates to frequency, channel, transmission / reception scheme / speed, etc., and a signaling structure includes three multiplexes (hereinafter, referred to as MUX). The format of MUX3 consists of a signal channel and a synchronization channel, and includes data for requesting link establishment in CT-2. The MUX2 format includes a signal channel and a synchronization channel, and includes data indicating that a link is allowed at the base. MUX1 is composed of a voice channel and a signal channel.

Referring to the drawings, in the first step, the CT-2 transmits to the base station in the format of MUX3 to the base station to request a link. Then, in the second step, the base station receives the link, checks the link, and if there is an idle link, transmits the format of MUX2 for acknowledging the link to CT-2. CT-2 then establishes the link by receiving the MUX2 format and proceeds to the authentication process. The authentication process first transmits the relevant values of the codec type and the message packet size among the base station access selection and the state of CT-2 in CT-2 to the base station in the third step. Then, in the fourth step, the base station receives it and transmits its information, namely whether to display or not, high speed signaling, base station producer number, and base station type. Then, in the fifth step, the base station transmits a value for authentication. In particular, the base station passes the randomly generated values RAND and ZAP set values. RAND is a 32-bit random value that CT-2 will use during call authentication. Then, in step 6, the CT-2 generates a CKEY using the RAND value and the KEY value using the 'F' algorithm, and transmits TRD (terminal registration data) and ZAP (stored in this pyrom) to the base station. Here, the CKEY is a 32-bit result of call authentication, calculated by CT-2 and sent to the base station for checking. Then, in step 7, the base station transmits the format of MUX2 to CT-2 without B-channel as channel control information. In step 8, CT-2 receives the response and sends a response signal. In step 9, the base station transmits a Mux1 format including a B-channel, and in step 10, the base station receives this and sends a response signal. This will generate a dial tone and allow the call.

However, a base station generally consists of several lines each having a channel to accommodate a certain user. In addition, the CT-2 service cannot establish a link when the telepoint is up to 200M and the base station moves out of this distance.

However, conventionally, after transmitting MUX3 from the CT-2 to the base station, the transmission waits. However, if there is no response from the base station within a certain time, the CT-2 completes the link setup without leaving an error message and attempting link setup again. The user then had to repeat the key from the beginning to see the error message and re-establish the link.

Accordingly, an object of the present invention is to provide a method for automatically setting a link in CT-2.

In order to achieve the above object, the present invention provides a method for establishing a link with a base station in a next-generation digital wireless telephone, the method comprising: performing a first process of transmitting a signal for requesting link setting to the base station, and performing the first process; After that, if a signal for approving the link setting is not input from the base station within a predetermined time, the second process is performed again after delaying the predetermined time.

1 is a simplified diagram of a next generation digital wireless telephone system.

2 is a flowchart illustrating a call setup process in a next generation digital wireless telephone.

3 is a block diagram of a Citi 2 Plus according to an embodiment of the present invention.

4 is a flowchart illustrating an automatic link establishment process in a next generation digital wireless telephone according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

3 is a block diagram of a CT-2 plus according to an embodiment of the present invention.

Referring to the drawings, reference numeral 10 is a first control unit, which controls the overall operation of the CT-2 plus. In particular, although not shown, the first control unit 10 includes a central processing unit (CPU), a ROM for storing an execution program according to the present invention, and an EPIR, an electrically programmable inactive memory. EEPROM) and a first memory section 11 composed of random access RAM.

12 is a display unit such as a liquid crystal display (LCD), and displays various display data including an icon indicating the state of the CT-2 plus under the control of the first control unit 10.

13 is a key input unit, which includes numeric keys for dialing and function keys for performing various functions, and outputs key data to the first control unit 10 by external manipulation. Here, the keys of the key input unit 13 perform various functions according to the setting of one key in order to perform the functions of the wireless call function and the CT-2.

36 shows an antenna of CT-2, and 30 shows a radio frequency (hereinafter referred to as RF) part. In this case, the RF unit 30 includes a transceiver 31, a first receiver 35, a transmitter 32, a frequency synthesizer 34, and a regulator 33. Here, the regulator 33 receives power from the power supply unit 19, adjusts the voltage to the voltage required by the RF unit 30, and outputs the voltage to the RF unit 30. The frequency synthesizer 34 generates a frequency for designating a transmission / reception channel of the transmitter 32 and the first receiver 35 under the control of the first controller 10. The transmission / reception separator 31 serves to separate transmission / reception of the radio signal to be transmitted or received and transmitted to the antenna 36 and the first receiver 35. The first receiver 35 converts the radio signal separated by the transmission / reception separator 31 into a signal processor 14 after performing frequency conversion by filtering and low noise amplification. In particular, the receiver 35 measures the RSSI level through a window. The transmitter 32 converts a signal input from the signal processor 14 into a frequency signal and outputs the signal to the transceiver 31 in the form of a radio signal.

In addition, the signal processor 14 operates under the control of the first controller 10, demodulates the digital signal input through the first receiver 35, converts the digital signal into an analog voice signal, and transmits the analog voice signal through the speaker 15. . In addition, the signal processor 14 is connected to the microphone 17, digitally converts the analog voice signal input from the microphone 17, modulates the digital signal and outputs it to the transmitter 32. In addition, the signal processor 14 includes a tone generator, and generates a tone through the buzzer 16 under the control of the first controller 10.

26 shows an antenna for a radio call unit, and 20 shows a radio call unit. The wireless call unit 20 includes a second control unit 21, a second memory unit 22, a decoder 23, a second receiver 24, and a regulator 25. The second controller 21 controls the overall operation of the wireless caller. In addition, the second control unit 21 is connected to the first control unit 10 and the communication line (RS-232C) to transmit and receive data with each other. When the call signal is input, the second controller 21 turns on the power switch 18. Here, the power switch 18 is controlled by the first control unit 10 on / off to supply or cut off power to the RF unit (30). The second memory unit 22 includes a ROM for storing a program executing a call mode, a RAM for temporarily storing data generated while the program is executed, and an inactive memory, EEPROM. The second receiver 24 receives the wireless signal received from the antenna 26, filters and amplifies the radio signal, and outputs the filtered signal to the decoder 23. The decoder 23 receives the call signal input from the second receiver 24, decodes it, and outputs the decoded call signal to the second controller 21.

4 is a flowchart illustrating an automatic link setting process in CT-2 according to an embodiment of the present invention.

Hereinafter, a detailed description will be given with reference to FIG. 3.

In step CT-2, MUX3 requesting a link of a possible channel is first transmitted to the base station in step 40 for link establishment. After that, if the MUX2 signal for accepting the link is not input for a predetermined time, CT-2 determines in step 41 that the link establishment has failed, and in step 42, the number of failures is determined. At this point, the CT-2 can continue to try until the link is established, but doing so increases power consumption significantly. Therefore, the link setting is repeatedly attempted only a certain number of times. Here, the example is 5 times. In step 44, the CT-2 returns to step 40 after delaying a predetermined time, and transmits the MUX3 requesting link establishment of a possible channel automatically to the base station. If the determination result is a predetermined number of times (5 times) in step 42, the CT-2 displays an error message in step 43 and ends. When the MUX2 signal for approving the link setting is input in step 41, the CT-2 rings a ring indicating the link setting in step 45 and displays it on the display unit 12. The user will then listen to the ring, recognize the link setting, and dial to make the call.

As described above, the present invention increases link setting opportunities by automatically repeating a link setting for a predetermined time. In addition, this facilitates the user's convenience.

Claims (4)

In the method of establishing a link with a base station in a next-generation digital cordless telephone, A first step of transmitting a signal for requesting link setting to a base station to the base station; Next-generation digital wireless telephone, characterized in that the second step of performing the first process after a predetermined time delay if a signal for approving the link setting within a predetermined time after performing the first process is input from the base station How to set up automatic linking in. The next-generation digital wireless telephone of claim 1, further comprising a third process of sounding a link setting notification when a signal for approving the link setting is input within a predetermined time after the first process is performed. How to set up auto link. The next generation digital wireless telephone according to claim 1, further comprising a fourth step of displaying display data indicating link setting when a signal for approving link setting is input within a predetermined time after performing the first step. How to set up automatic linking in. The next generation digital wireless telephone of claim 1, further comprising a fifth step of displaying an error message if the link setting fails after repeating the link setting to the next channel a predetermined number of times in the second step. How to set up auto link.