The delay circuit with automatic adjustment and transmission scheme for simultaneous transmission of signals paging system

 

(57) Abstract:

The delay circuit with automatic adjustment for simultaneous transmission of signals paging system, which is achievable technical result, contains the power supply reference clock signal for supplying the synchronization signal as a reference clock signal in the different sections, panel data page that is installed inside a paging system for receiving data pages and data page synchronously with the reference clock signal supplied from the power supply reference clock signal, a transmission line and a transmission device installed between the main station and panel data page data page in the main station, and a transmitter for receiving data pages, transmitted through the transmission line and the transmission device, performing an external data page synchronously with the reference clock signal generated in the power supply reference clock signal. 3 C.p. f-crystals, 11 ill.

The invention relates to a method of simultaneous transmission of signals, which can prevent the reduction of the rate of admission due to the phase difference of the signals generated by provname stations in a paging system with many main stations.

This application is based on Korean application N 41673/1995, which are hereby incorporated by reference.

In a traditional paging system, which is shown in Fig. 1, the data pages are usually transmitted from the paging system 10 is transmitted from the paging system 10 in the transmitters 24 main stations 20 connected through the transmission line 12 and the apparatus 16 of the transmission, this produces a time delay between the transmission line 12 and the transmission equipment. At this time, the deviation of the time delay depends on the characteristics of various devices, and the delay time becomes different depending on the number of transmission equipment and the length of the transmission line. Due to the time delay many transmitters 24, is connected to many major stations, is the deviation for each transmission time in order to form an area of overlap of the signals generated by the transmitter 24 of the respective main stations 20, as shown in Fig. 2. At this time, the signals received from the field 28 overlap, you may receive the phase difference between two signals received from the first base station and the second base station, as shown in Fig. 3. Moreover, in E. to a decrease in the ratio of reception of the receiver 25 of the pager. So below, with reference to Fig. 4, will be described by the traditional way of solving the problem, according to which the ratio of the reception signal is weakened in the area of overlap. First, the main transmission line 12 for the transmitted data pages and the first and second backup lines 32 and 34 connected to the apparatus 30 of the measurement delay line and equipment 46 switching line installed inside the first base station 20, which is installed inside the paging system 10. The apparatus 46 of the switching line is controlled by the controller 44 to the main station, established in the first base station 20. At this time, the apparatus 30 of the measurement delay line transmits the command to the controller 44 of the base station for the connection circuit between the main transmission line 12 and the first backup line 32 and between the main transmission line 12 and a second backup line 32, and then transmits predetermined data to measure the time delay of each circuit. At this time, for example, be determined by the method of calculating the measured time delay circuit. Assuming that the time Txydelay circuit between the main transmission line 12 and the first backup line 32 is equal to 2000 μs, the time Txzdelay circuit between the main line 12 predacious backup line 34 is equal to 2200 µs, time Txthe main transmission line 12 will be calculated as follows:

Txy= Tx+ Ty, (1)

Txz= Tx+ Tz, (2)

TK= Ty+ Tz. (3)

Now Txis the above system of equations:

Tx= [(Txy) + (Txz) - (TK)] / 2 = [2000 + 2500 - 2200] / 2.

At this time Txequal to the time delay from the paging system 10 of the main line 12 transmission to the first base station 20, Tyequal to the time delay from the paging system 10, the first backup line 32 to the first base station 20 and Tzequal to the time delay from the paging system 10 second backup line 34 to the first base station 20. As described above, are measured corresponding to the delay times from the main transmission line 12 to the many main stations 20 and then set the reference value. Because the difference obtained by subtracting the respective delay times of the reference value equal to the time detained by transmitter 24, the transmitters 24 all major stations 20 can simultaneously transmit data. Therefore, in the case of three main stations 20, it is assumed that the delay time from paging the Noi station 20B is equal to 3000 microseconds, the delay time from the paging system 10 to the third base station 20C is equal to 3500 μs, and the control value is set to 5000 μs, the delay time of the transmitter of the first base station 20A becomes 5000 - 2500 = 2500 μs, the delay time of the transmitter of the second base station 20B becomes 5000 - 3000 = 2000 μs and the delay time of the transmitter of the third base station 20C becomes 5000 - 3500 = 1500 μs. Therefore, because the data that will be transmitted from the paging system 10, delayed constantly, 5000 μs, regardless of the delays of the transmission lines, the transmitter 24 of the main stations 20 can transmit data at the same time.

However, according to the traditional technique of the measurement instrument separate lines should be run inside a paging system to calculate the losses generated between the respective lines and transmitters. Moreover, set a predetermined reference value, and the time delay in the transmitted data page must be set in accordance with the control value. Thus, to run complex operations to calculate each transmission losses.

Moreover, when the page data is transmitted from the paging system Braz, even if the delay time is set using the backup lines, based on the reference loss, transmission delay is not constant.

Therefore, the object of the invention is the provision in the system for automatic control of the transmission delay of data transmitted page through a scheme of automatic delay included in the transmitters of many main stations connected to a paging system, by submitting a reference clock signal to many main stations through the feeder reference clock signal and the synchronization data page with the reference clock signal.

The task according to the invention is solved in that the delay circuit with automatic adjustment for simultaneous transmission of signals paging system containing means for supplying reference clock signal for supplying the synchronization signal as a reference clock signal to various parts, panel data page that is installed inside a paging system for receiving data pages and data page synchronously with the reference clock signal supplied from the feeder reference clock signal line is La data page at the main station, and transmitters for receiving the page data transmitted through the transmission line and the transmission device, performing an external data page synchronously with the reference clock signal generated by the means for supplying the clock signal.

The invention is further explained by the specific version of its embodiment with reference to the accompanying drawings, in which Fig. 1 is a structural diagram of the conventional paging system, Fig. 2 depicts a work area of the main stations and the overlap signal in a traditional paging system, Fig. 3 depicts the shape of the receiving signal data pages from the main areas of work stations and the overlap signal in a traditional paging system, Fig. 4 is a structural diagram of a traditional paging system for measuring time delay line and main stations, Fig. 5 is a structural diagram of the paging system main stations, Fig. 6 is a block diagram depicting the transfer of data pages, Fig. 7 is a timing diagram depicting the transmission of the page data, Fig. 8 is an algorithm depicting the data of the page of Fig. 9 is a block diagram of the transmitter of Fig. 10 is a block diagram schematic of the automatic delay Fig. 11 is a timing chart diagram automodello the invention consists of a block 50 of the filing of the reference clock signal for supplying the synchronization signal as a reference clock signal to various parts, panel 48 data page that is installed inside a paging system for receiving data pages and data page synchronously with the reference clock signal supplied from the block 50 of the supply clock signal, the transmission line 12 and the transfer device 14 installed between the main station and the panel 48 data page data page in main stations, and transmitters 24 and 26 for receiving the page data transmitted through the transmission line 12 and the device 14 to send out the external data page synchronously with a clock signal generated in block 50, the supply of the clock signal.

Fig. 6 is a block diagram of panel data page according to the present invention. The controller 52 detects, stores that data will be transmitted in the memory 58 when the reference clock signal from the block 50 of the transmission reference clock signal to generate the interrupt signal, and transmits the page data through the block 54 serial I/o data if the data is found.

Fig. 7 is a timing diagram depicting the data page according to the present invention.

Fig. 9 is a block diagram of the transmitter according to the present invention, including a controller 62 for controlling various parts of the transmitter 20, the block 64 match the input data controlled by the control signal from the controller 62 to reconcile the data page if the page data is entered from the paging system, the modem 66, controlled by a control signal from the controller 62 to modulate the input data page, if you enter consistent data pages from block 64 match the input data, circuit 68 delays with automatic adjustment for automatic delay output data synchronously with the reference clock signal by receiving the page data from the output of the modem 66 as its first input and receiving the clock signal supplied from the block 50 filing reference clock signal, as its second input, the synthesizer 70 frequency for receiving denigrative frequency of these data, and radio frequency (RF) transmitter 72 for transmission to the page output from the synthesizer 70 frequency.

Fig. 10 is a block diagram of a delay with automatic adjustment according to the present invention, including a block count 74 for counting the input page data synchronously with a reference clock signal, the trigger-latch 76 for fixing the values of the count, which is calculated by synchronizing the input page with the reference clock signal, and circuit 78 delay for delaying the data page using the values recorded in the trigger-latch 76.

Fig. 11 represents a timing diagram of the delay circuit with automatic adjustment according to the present invention.

Hereinafter the present invention will be described by the block diagram depicted in Fig. 6, 9 and 10 with reference to the plot of temporal waveforms depicted in Fig. 7 and 11.

First, the synchronization signal as a reference clock signal supplied from block 50 filing reference clock signal in panel 48 data page paging system 10 and is synchronised with the page data transmitted from beijingbeijing clock signal and generates the interrupt signal, the controller 52 detects whether data is transmitted in the memory 58. If the data already exist, the panel 48 data pages transmits page data through the block 54 serial input/output data. Next, the output signal of the data page through the block 54 serial I/o data is transferred in many mainstream stations (here, the main station 20 through the transmission line 12 and the device 14 of the transmission. After that, the transferred data pages are taken from the first base station 20 and fed to the transmitter 24 installed inside the first base station 20, as its first input. To the same reference clock signal, which is generated from the block 50 filing reference clock signal that is installed inside the first base station 20, is fed as a second input signal of the transmitter 24. At this time, the reference clock signal represents the same signal as the one that is supplied from the paging system 10. If you enter these pages, the transmitter 24 outputs the input data page in the modem 56 after agreeing in block 60 match the input data. Then the modem 56 receives and modulates the data pages and displays them in the circuit 68 delays the automatic is as its first input and receives the reference clock signal, supplied from the block 50 filing reference clock signal, as its second input signal in order for the loan to adjust the synchronization of the input data page. At this time will be described in more detail the operation of the circuit 68 delays with automatic adjustment. If the reference clock signal is entered from block 50 filing reference clock signal, the subtractive counter 74 calculates the time for the data pages, which are received by the transmitter 24. The estimated time is equal to Ta(time of arrival), is shown in Fig. 11. In addition, the value calculated in the subtractive counter 74 is fixed in the trigger-latch 76, which will then be filed in the circuit 68 delays with automatic adjustment as its first input. At this time, the circuit 68 delays with automatic adjustment delay on the time difference obtained by subtracting a fixed time delay of a predetermined control time, i.e. the time that will linger transmitter 24, which is denoted as Tr(control time) in Fig. 11.

Then the output signal of the data page through the circuit 68 delays with automatic adjustment is synthesized frequency that C is a base station 20.

As described above, the present invention provides a system for automatic control of the transmission delay of data transmitted page through a scheme of automatic delay included in the transmitters of many main stations connected to a paging system, by submitting a reference clock signal in many mainstream stations through the feeder reference clock signal and the synchronization data page with the reference clock signal. Therefore, it is possible to increase the enrolment ratio of overlap between the signal and to make a more simple system of simultaneous transmission of signals. Yo

1. Paging system for simultaneous transmission of data pages, connected by transmission lines and transmission devices with many main stations containing transmitters, characterized in that it further comprises a panel data pages, blocks the supply of the reference clock signal, the input synchronization signal used as a reference clock signal, in panel data pages and the main transmitters of the stations, and panel data pages transmits page data synchronously with a reference clock signal supplied from service page synchronously with the reference clock signal, received from the respective feed block reference clock signal.

2. The system under item 1, characterized in that the panel data page contains a controller for generating a termination signal to derive data page reference clock signal supplied from the power supply reference clock signal, a memory unit for removing the stored page data to the output controller depending on the interrupt signal excretion data page is generated by the controller, and block serial input/output data to convert the page data output from the memory unit under control of the controller, and excretion thus converted serial data.

3. The system under item 1, characterized in that the transmitter includes a controller to control the transmitter, the block match the input data controlled by the control signal from the controller to reconcile the data page if the page data is entered from the paging system, modem, controlled by a control signal from the controller to modulate the input data page, if you enter the agreed page data of the block match the input data, and therefore the starting signal by receiving data pages from the output of the modem as its first input and receiving the clock signal, supplied from the power supply reference clock signal, as its second input, the block synthesizing frequency for receiving data detained by the delay circuit with automatic adjustment, and output therefrom, and synthesizing the frequency of these data, and the power transmission on the radio frequency (RF) to transmit the page data output from the synthesizing unit frequency.

4. The system under item 3, characterized in that the delay circuit with automatic adjustment contains the block count for counting the input page data synchronously with a reference clock signal, the trigger latch Assembly to latch the value of the count counted by synchronizing the input page with the reference clock signal, and a unit delay circuit for delaying data page using the values recorded in the trigger latch.

 

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