KR0137353B1 - Traffic channel connecting method in the trs - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frequency common communication system, and in particular, to control the transmission order of terminals in order to prevent data collision caused by multiple terminals simultaneously transmitting to one channel when two or more channels of the repeater are free. The present invention relates to a communication channel access method of a frequency common system to enable smooth communication.

To this end, in the method for connecting a communication channel of a frequency common system including a repeater 60 including a plurality of high frequency channels, a high frequency control unit, a repeater controller, a network switch 92 and a plurality of terminals, the repeater includes one free channel. Or, if there is more than one, it restricts the terminal that can send data to avoid data collision.

Description

Communication channel connection method of frequency common system

1 is a configuration diagram of a conventional frequency common system,

2 is a terminal block diagram of a conventional frequency common system,

3 is a priority decision flow diagram of the repeater controller according to the present invention,

4 is a flowchart of a repeater controller according to the present invention;

5 is a flowchart of a high frequency control unit according to the present invention;

6 is a flowchart of a terminal according to the present invention.

* Description of Codes on Major Parts in Drawing

1 ₁ -1 _n , --20 ₁ -20 _n : Terminal 1-2-: High frequency channel

21, 22, 39, 40: high frequency control unit 91: repeater controller

92: network switch 51: antenna 41: transceiver

42: voice control unit 43: speaker 44: microphone

45: frequency synthesizer 46: keypad 48: control unit

50: EEPROM60: Repeater 49: Indicator

The present invention relates to a frequency common system, and in particular, when the channel of the repeater is less than two free (free) by controlling the transmission order of the terminal in order to prevent data collision caused by the simultaneous transmission of multiple terminals in one channel The present invention relates to a communication channel access method of a frequency common system for smooth communication.

In general, the Trunked Radio System is a terminal that allows a mobile terminal to call a number or a specific mobile device at any place within a call area and talk to a general telephone subscriber, and receives and processes a signal of the terminal to repeat the relay. And a network switch connecting the repeater and the subscriber to the general telephone.

As the block diagram of a typical trunked system, turning 1, each terminal _{(1 1 -1 n, 2 1} -2 n, --20 1 -20 n) is the home (home a number of radio frequency channels (1-20) ) Channel, and transmits and receives control data with the high frequency control unit 21-40 of the repeater 60 at a speed of about 300bps and 5Kbps.

In addition, the repeater 60 includes 20 high frequency channels 1-20 and a high frequency control unit 21-40 for adjusting each channel, and data processing between the high frequency control unit 21-40 and the network switch 92. It is composed of a repeater controller 91 for adjusting the high frequency control unit 21-40, the high frequency channels 1-20 are each home channel by the high frequency control unit 21-40 by the adjustment of the repeater controller 91. After that, it periodically broadcasts control data for terminals 1 ₁ -1 _n , 2 ₁ -2 _n, --20 ₁ -20 _n .

In addition, the network switch 92 transmits and receives control data and voice signals related to a call, such as a connection attempt between the repeater controller 91 and the PSTN, and a monitoring device and a billing device (not concurrently) required for operation of other common frequency systems. ).

2 is a block diagram of a terminal, wherein the terminal is a home channel or a free channel for controlling the transmitter / receiver 41, the voice controller 42, the speaker 43, the microphone 44, and the controller 48 for wireless communication. A frequency synthesizer 45 capable of setting a frequency in a channel, a control unit 48 for adjusting control data between the hardware of the terminal and the repeater, an indicator 49 for displaying the state of the terminal, and a key that is a user interface. A pad 47, a buzzer 46, and a single code of a terminal, a group code between a system and a group, a call time of a terminal, a terminal number, and an EEPROM 50 for storing initial data required for use of the terminal. .

In addition, each terminal has 10 systems in operation and 10 group numbers for each system, the system and the group is determined by adjusting the keypad 47 of the terminal, and the transmission and reception numbers are determined. The number is composed of 1-250 numbers and may have the same number of multiple terminals.

The operation of the frequency common system made as described above is as follows.

First, the repeater 60 uses the repeater control unit 31 to fix the channel to each home channel, and then the terminal 1 _{1-1 n} , 2 _{1-2 n,} - 20 ₁ -20 _n) and periodically delivered to the information such as the number, the home channel number, a number of free channels and relay controller 31 of the network switch 92 to the.

At this time, each terminal (1 ₁ -1 _n , 2 ₁ -2 _n, --20 ₁ -20 _n ) is a system and group stored in the EEPROM (50) when the power is turned on by the control unit 48 Display the dispatch mode, dispatch mode, phone mode, etc., fix the frequency synthesizer 45 to the channel of the selected system, and then control information from the relay 60 to the antenna 51. After fixing the control information from the repeater to the control unit 48 through the antenna 51, the transceiver 41, the frequency synthesizer 45.

The received structure wave channel information of the repeater is determined by the control unit 48 of the terminal (1 ₁ -1 _n , 2 ₁ -2 _n, --20 ₁ -20 _n ) and the dispatch call is dispatch call (dispatch call) receives the voice data by driving the speaker 43 of the voice control unit 42, if the phone call (Phon call) 1 ₁ -1 _n , 2 ₁ -2 _n, --20 ₁ -20 _n ) is informed to the user through the buzzer 46 by the control of the control unit 48 and the call is made by the user's off-hook.

On the other hand, when looking at the origination status of the terminals (1 ₁ -1 _n , 2 ₁ -2 _n, --20 ₁ -20 _n ), the user selects the number of the system and group selected by the keypad 47 which is the user interface, 92), the number of the repeater controller 92, the function code, etc., after adjusting the frequency synthesizer 45 to the free channel received by the call key or the PTT key of the keypad 47 as the structural wave of the home channel, the protocol (PROTOCOL) The high frequency control unit 21-40 of the repeater 60 receives the received signal and transmits it to the repeater controller 91 when the PSTN call is received according to the function code and the group number.

The repeater controller 91 attempts to connect to the PSTN by transmitting to the network switch 92. If the dispatch call is a terminal of the home channel, the received data is transmitted through the high frequency channel (1-20). A call is made by calling a terminal having the received group number, and if the terminal is not a home channel, the dispatch call information is transmitted to the corresponding high frequency control unit 21-40, and the high frequency control unit 21-40 receives the call. By sending data moving to a high frequency channel (1-20) occupied by a terminal calling terminals of a group number, a plurality of terminals receiving the group number move to a stored channel to make a call.

In the conventional frequency common system operated as described above, when almost all channels of the repeater are used as dispatch calls or PSTN calls of the terminals, a plurality of terminals using each high frequency channel as a home channel may use one or two idle high frequency channels. Since many terminals are required to dispatch or PSTN calls at the same time without priorities because they must be used as free channels, data collisions occur, which makes it difficult to use the remaining one or two free channels. Will be.

The present invention is to solve the above problems, if a plurality of terminals in the frequency common system (TRS) is used as a dispatch call or PSTN call almost all channels of the repeater is one or more high-frequency terminals each home channel In order to prevent data collision caused by many dispatchers requesting a dispatch call or PSTN call at the same time, two terminals can use the frequency sharing system by adding the transmission priority function of the terminal when there is more than one free channel. The present invention provides a communication channel access method of a frequency common system to improve the reliability of the system.

The present invention relates to a communication channel connecting method of a frequency common system including a repeater comprising a plurality of high frequency channels, a high frequency control unit, a repeater controller, a network switch, and a plurality of terminals, in which one or more free channels of the repeater are provided. By adding the priority function of the terminal, it is possible to prevent data collision by limiting the terminal which can transmit data when the free channel is Hano or two.

Hereinafter, described in detail by the accompanying drawings as follows.

The configuration of the common frequency system according to the present invention is the same as FIG. 1 and FIG. 2, FIG. 3 is a flow chart of priority determination of the repeater controller 91, FIG. 4 is a flow chart of the repeater controller 91, and FIG. The flow chart of the control unit 21-40 and FIG. 6 are terminal flow charts, which will be described with reference to FIGS. 1 to 6 as follows.

Referring to the priority flow chart of the repeater removing unit 91 by FIG. 3, first, the repeater controller 91 periodically checks whether the channel is used from each of the high frequencies 21-40, and all channels are in use (101). Step) or if one or two channels are free (step 102 and step 103), the priority 1 is informed to all high frequency controllers 21-40, the two channels are free, and after 0.5 seconds, priority 2 is set to all high frequencies. The controller 21-40 informs the controller 21-40, and then 0.5 seconds later, the priority 3 (105), priority 4 (106), priority 5 (107), and the like. If the free channel is one in two again, priority 1 (step 102) and three or more in priority 3 (108) are notified to the high frequency controller 21-40.

The priority determined as described above is high-frequency from the high-frequency controller 21-40 in the data reception (step 201) from the high-frequency controller 21-40 as shown in the flowchart of the repeater controller 91 shown in FIG. The priority of the controller 21-40 is received and the priority is determined (step 202), and the determined priority is again transmitted to the high frequency controller 21-40 (step 203).

At this time, if the terminal originating data PSTN call request from the high frequency controller 21-40 (step 204) is transmitted, the PSTN call signal is transmitted to the network switch (step 205). The control unit 91 receives the PSTN call authorization (step 206), and the repeater control unit transmits data to the corresponding high frequency control unit 21-40 (step 207).

5 is a flowchart of the high frequency control unit 21-40. In step 203 of FIG. 4, the priority is sent together with other information (step 301). The high frequency control unit 21-40 in the standby state is a terminal. Receiving data from the terminal (step 302), comparing the priority of the terminal with the priority received from the repeater controller 91 (step 303), and in case of a dispatch call, receiving data broadcast from the terminal (step 304) and then receiving it. The corresponding high frequency controller 21-40 determines whether the PSTN signal is from the repeater controller 91 (steps 311 and 306) and broadcasts the PSTN signal (steps 312 and 307). The high frequency control unit 21-40 receives the call state as a PTT off and off hook signal according to the user's keypad operation, and informs the repeater controller 91 that the high frequency channel is in use (step 309). The home channel terminals are broadcasted in step 310.

At this time, if the off-hook signal for the PSTN call is not received for a predetermined period (step 315), the relay controller 91 notifies that the high frequency channel is free (step 316), and indicates that the high frequency channel is free for the terminal of the home channel. In step 317, the broadcast is made.

The sixth turning a flow chart of the terminal, as the data is received from repeater 60 (step 401 the terminal _{(1 1 -1 n, 2 1} -2 n, --20 1 -20 n), from each groove channels Priority information from the repeater is received and the information is stored (step 402).

As described above, the terminal _{(1 1 -1 n, 2 1} -2 n, --20 1 -20 n), the high-frequency control section (21-40), a repeater 91 every second and every know the use priority of the radio frequency channel In this case, the terminal determines whether the call signal is performed (step 403) and moves to the call channel (step 404).

Subsequently, when the terminal initiates a dispatch call or a PSTN call, the terminal determines whether the user presses the PTT key or the call key of the keypad 47, which is a user interface (step 405), and when the predetermined key is increased, the EEPROM 50 of the terminal. If the priority from the repeater is high compared to the priority of the system and group number currently selected by the user and the priority received from the repeater 60 (step 406), a busy signal is generated (step 407). Returning to the data reception from the step (401), if the priority of the terminal is high, go to the call channel received from the repeater (step 408), and transmits the terminal single number, group number, priority, etc. to the repeater (step 409). When the received priority from the terminal is high, an acknowledgment (ACK) signal is sent, and the terminal, which has received the signal, returns to the call state in step 410.

At this time, the high frequency control unit 21-40 informs the low speed speed (300bps) of the channel being used and the channel number for the idle terminal having its own channel as the home channel, and the repeater controller 91 transmits the high frequency channel. Indicate that it is in use.

As described above, according to the present invention, a plurality of terminals are simultaneously concentrated in the free channel when the high frequency channel is one or two free by additionally operating the transmission priority. By limiting the terminals that can be sent from the repeater and for each terminal, data collision can be avoided to improve the reliability of the frequency common system.

Claims (4)

In the communication channel connection method of a frequency common system including a repeater 60 comprising a plurality of high frequency channels, a repeater controller, a network switch 92 and a plurality of terminals, When the one or more free channels of the repeater is added, the priority function of the terminal is added to limit the terminals that can send data when there are one or two free channels to avoid data collision. Call channel connection method of a common frequency system. The method of claim 1, wherein the repeater controller Periodically determining whether the channel is used by the high frequency control unit and notifying all high frequency controllers 21-40 of the first priority when all channels are in use or two channels are free (steps 101-103); After the two channels are free and 0.5 seconds have passed (step 104, 105) of informing the second high priority control unit 21-4 of the second priority, After 0.5 seconds have passed to the high frequency control unit 21-40 to sequentially inform the third to fifth priority 4 (step 106) (106,107) step; In order to control the priority of the high frequency control unit according to the process (step 108) of informing the high frequency control unit 21-40 of the first priority when the free channels become one in two and the third priority when two or more become two or more. A communication channel access method for a frequency common system. According to claim 1, wherein the repeater controller, Receiving use status data from the high frequency control unit 21-40 to determine the priority (steps 201 and 202), The determined priority is again transmitted to the high frequency controller 21-40 (step 203), Transmitting the PSTN call signal to the network switch (step 205) when the outgoing data of the terminal from the high frequency controller 21-40 requests a PRSTN call (step 204); When calling the terminal from outside, the repeater controller 91 receives a PSTN call authorization (step 206), And controlling the priority according to the step (207) of transmitting data when receiving the PSTN call. The method of claim 1, wherein the terminal, Upon receiving data from the repeater, the terminals receive priority information from each home channel, and store the information (steps 401 and 402); Thereafter, determining whether the call signal is performed and moving to a call channel (steps 403 and 404); Determining whether the PTT key or the call key is pressed, and comparing the priority with the predetermined key is pressed (steps 405 and 406), If the priority is high from the repeater to generate a busy signal to enter the data receiving step, if the priority of the terminal is high to move to the call channel received from the repeater (steps 407 and 408), Thereafter, the terminal transmits data such as a terminal, group number, priority, etc. to the repeater, and when an acknowledgment (ACK) signal is detected from the repeater, access to the call channel is performed according to the process of entering the call state (steps 409 and 410). How to connect call channel of system.