KR100259916B1 - Method for autometically setting link in accordance with resistered slot in ct2 - Google Patents

Abstract

PURPOSE: A method for automatically setting up links according to registered slots in a digital cordless telephone is provided to carry out link attempts sequentially for all the slots registered according to the priority of the latest link success time. CONSTITUTION: A control part scans a key input part and checks whether an origination key is inputted(301). If the input of the origination key is detected, the control part searches a memory for the data for the currently registered slot(303). Then the control part attempts a link to a high RSSI channel of the slot(305). The control part checks whether a link is set up to the highest priority slot(307). If the link is not set up, the control part checks whether the slots registered in priority exist in the memory(309). If the control part attempts a link to the next highest priority slot. If the link is set up, the control part checks whether a base station mode of the current slot is different from a preset base station mode(315). If the current mode is different from the preset base station mode, the control part modifies the preset base station mode into the current mode(317) and updates the priority data of the current slot into the highest priority(319).

Description

How to set auto link by registration slot in digital cordless phone {METHOD FOR AUTOMETICALLY SETTING LINK IN ACCORDANCE WITH RESISTERED SLOT IN CT2}

The present invention relates to a method for establishing a link in a next-generation digital radiotelephone, and in particular, automatic link setting for each registered slot in a digital radiotelephone which attempts to sequentially link all registered slots according to a priority of a time when a link is recently formed. It is about a method.

Typically, Second Generation Cordless Telephones (hereinafter referred to as "CT2") are connected to a Public Switching Telephone Network (PSTN) via a base station called Telepoint. The base station includes a public base station and a home base station. The CT2 can talk within a radius of 200m of the base station.

As is well known, the CT2 conforms to the CAI (Common Air Interface) protocol, which is a standard, and employs a frequency division multiple access / time division duplex (FDMA / TDD) scheme.

1 is a flowchart illustrating a call setup process between a conventional next generation digital radiotelephone and a base station.

The call setup is largely performed by generating a dial tone through a link setup and authentication process, and the call setup is briefly described since it is known in the CAI protocol.

CAI is largely divided into a radio interface unit and a communication signaling protocol. In this case, the radio interface unit relates to a frequency, a channel, a transmission / reception scheme / speed, etc., and a signaling structure includes three multiplexes (hereinafter, referred to as “MUX”). The format of the MUX3 is composed of a signal channel and a synchronization channel, and includes data for requesting link establishment from the CT-2 to the base station. The MUX2 format includes a signal channel and a synchronization channel, and includes data indicating that the base station permits the link to CT2. MUX1 is composed of a voice channel and a signal channel.

Referring to the drawings, first, when a user attempts to transmit, CT2 detects the transmission attempt and transmits a format signal of MUX3 to request a link in the first step. Then, the base station receives the signal of the MUX3, confirms the link, and if there is an idle link, transmits the format signal of the MUX2 that approves the link to the CT2 in the second step. CT2 then receives the MUX2 signal, establishes the link, and proceeds to the authentication process. The authentication process first transmits the related values of the codec type and the message packet size to the base station among the base station connection selection and the state of CT2 in CT2. Then, in step 4, the base station receives the related values of the codec type and the message packet size and determines its own information, namely whether to display, high speed signaling, base station producer number, and base station type. To send. In particular, the base station transmits a randomly generated value RAND and ZAP set value to CT2. Where RAND is a 32-bit random value that CT2 will use during call authentication. Then, in the sixth step, CT2 generates a CKEY which is an encryption key using the 'F' algorithm using the RAND value and the KEY value, and transmits a TRD (Terminal Registration Data) and a ZAP to the base station. Here, the CKEY is a 32-bit result of the call authentication operation, which is calculated by CT2 and transmitted to the base station for checking. Then, in step 7, the base station transmits the format signal of MUX2 to CT2 without the B-Channel as the channel control information. Then, in step 8, CT2 receives the format signal of MUX2 and transmits a response signal to the base station. In step 9, the base station receiving the response signal transmits a signal of MUX1 format including the B-Channel to CT2. CT2 receives the MUX1 and transmits a response signal to the base station. This will generate a dial tone and make the call possible.

If the call is enabled in the aforementioned call formation process, the CT2 attempts to establish a link for only one registered slot, and also attempts to link only to the slot during redialing.

Therefore, the user has an inconvenience of changing the base station mode and repeatedly attempting to link a key from the beginning.

Accordingly, an object of the present invention is to provide an automatic link setting method for each registered slot in a digital radiotelephone which attempts to sequentially link slots that are prioritized according to the latest successful time of the link at the time of call origination.

The present invention for achieving the above object; In a digital radiotelephone having a memory for storing the priority according to the inverse of the link formation success time for each registered slot, the automatic link setting method for each registered slot, when the outgoing request is detected, is set to the digital radiotelephone. A first process of attempting to establish a link to a registered registration slot; a second process of determining whether the link establishment attempt is successful; and if the link establishment fails as a result of the determination, the priority of all registered slots According to the third process to try to establish a link sequentially.

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

Figure 2 is a block diagram of a next generation digital radiotelephone to which the present invention is applied.

3 is a flowchart illustrating a method for automatically setting a link per registration slot 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.

2 is a block diagram of a next generation digital radiotelephone to which the present invention is applied.

Hereinafter, referring to the drawings, the controller 10 manages the overall operations. In particular, although not shown, the control unit 10 includes a central processing unit (CPU), a ROM storing an execution program according to the present invention, an electrically programmable EEPROM and an arbitrary access RAM. And a memory 11 made of (RAM). The display unit 12 is a display device such as a liquid crystal display (LCD). The display unit 12 displays various display data including an icon indicating the state of CT2 under the control of the control unit 10. The key input unit 13 is composed of a plurality of numeric keys and function keys for performing various functions, and outputs key data to the controller 10 by an external operation. The radio frequency unit (hereinafter referred to as an "RF unit") 30 includes a transceiver 31, a receiver 32, a transmitter 33, and a frequency synthesizer 34. Here, the frequency synthesizing unit 34 generates a frequency for designating a transmission / reception channel of the transmitting unit 33 and the receiving unit 32 under the control of the control unit 10. The transmitting / receiving separating unit 31 transmits or receives the received signal. Separating and transmitting the radio signal to the antenna 35 and the reception unit 32 serves as a separation. The reception unit 32 is a signal after the frequency conversion by filtering and low-noise amplifying the radio signal separated from the transmission and reception separation unit 31 In particular, the receiver 32 measures the received field strength (RSSI) level through a window The transmitter 33 performs a frequency conversion on the signal input from the signal processor 14. The signal is output to the transmission and reception separation unit 31 in the form of a signal, and the signal processing unit 14 operates under the control of the control unit 10, and demodulates the digital signal input through the reception unit 32 into an analog voice signal. And converts the sound through the speaker 15. The signal processor 14 digitally converts an analog audio signal input through the microphone 17 and modulates the analog voice signal into a digital signal and outputs the digital signal to the transmitter 32. The signal processor 14 includes a tone generator, Under the control of 10), the buzzer 16 generates a tone.

3 is a flowchart illustrating an automatic link setting method for each registration slot in a next-generation digital wireless telephone according to an exemplary embodiment of the present invention.

Referring to the flowchart below, first, in step 301, the control unit 10 scans the key input unit 13 and checks whether a calling key is input. At this time, when the input of the originating key is detected, the controller 10 searches the memory 11 in step 303 to read data for the currently set slot, and proceeds to step 305 in which the RSSI of the corresponding slot is currently set. Attempt to link to a higher level channel.

After step 305, the controller 10 proceeds to step 307 to check whether a link is established in the highest priority slot. If the link is established, the controller 10 proceeds to step 315. If the link is not established, the controller 10 proceeds to step 309 and checks whether there is a slot registered in the memory 11 with priority. As a result of the memory 11 test, if there is a registered slot, a link is attempted to the next registered slot having a higher priority, and the process returns to step 307. The controller 10 repeatedly performs the above-described steps 307, 309, and 311 for all slots registered in the memory 11 until a link is formed.

In step 307, 309 and 311, if there is no more registered slot in the state in which the link is not established in the check of the existence of the registered priority slot in step 309, the controller 10 proceeds to step 313 and fails in the link. An error message is displayed on the display unit 12, and the process ends.

On the other hand, if the link is established in the link establishment check in step 307, the controller 10 proceeds to step 315 to check whether the base station mode of the slot in which the current link is set is different from the base station mode previously set in the memory 11. If the base station mode of the current slot is different from the previous base station mode in step 315, the flow proceeds to step 317 to change to the base station mode of the slot in which the current link is set, and in step 319, the slot in which the link is set as the priority slot is the priority data. Update it. However, if the base station mode of the slot in which the current link is formed in step 315 is the same as the previous base station mode, the process proceeds directly to step 319 to update the priority data of the slot in which the current link is set to the highest priority data.

As described above, the present invention has an advantage of reducing the time required for link establishment by automatically attempting a link according to priority for all registered slots regardless of the base station mode.

Another advantage of the present invention is that since the base station mode is automatically changed when the base station mode and the previous base station mode of the slot in which the link is formed after the link is formed, the user does not need to change the base station mode.

Claims (3)

In the digital radiotelephone having a memory for storing the priority according to the inverse of the link formation success time for each registered slot, the automatic link setting method for each registered slot, A first step of attempting to establish a link to a registration slot currently set in the digital radiotelephone when a call request is detected; A second step of determining whether the link establishment attempt is successful; And if the link is unsuccessful, attempting to establish a link sequentially in accordance with the priority for all the registered slots. The method of claim 1, A fourth process of determining whether or not the base station mode of the slot in which the link is set is identical to the preset base station mode when the link is established during the execution of the third process; And a fifth process of changing to a base station mode of the slot and setting the priority to the highest priority if the base station mode of the set slot and the preset base station mode are the same. How to set up auto link by registration slot in. The method of claim 1, And a sixth step of displaying an error message if a link is not formed after the end of the third step.

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