KR100328571B1 - An apparatus for compensating a delay time of wireless communication systems - Google Patents

Abstract

Disclosed is a mobile communication system capable of eliminating a communication obstacle due to time delay generated when transmitting a communication signal on a wired or wireless transmission path. The system receives the main reference clock generated by the forward communication signal processor and supplies it to the forward processor, receives the first delay time data and the reference clock, calculates a second delay time which is a delay time between the forward communication signal and the reverse synthesized signal. And a second delay time controller for controlling a transmission time of the forward communication signal according to the calculated second delay time data. And a first delay time calculator configured to calculate a first delay time that is a delay time generated when the forward synthesized signal is transmitted from the sub reference clock corresponding to the current time and the main reference clock included in the forward synthesized signal.

Description

Mobile communication system that can compensate for time delay {AN APPARATUS FOR COMPENSATING A DELAY TIME OF WIRELESS COMMUNICATION SYSTEMS}

The present invention relates to a mobile communication system, and more particularly, to an apparatus for preventing a communication failure due to a time delay generated when transmitting a communication signal using a wired or wireless transmission line.

In a typical mobile communication system, when a signal is transmitted or received, a forward communication signal transmitted from a base station to a terminal and a corresponding reverse communication signal must be within a certain time difference, and if the time limit is exceeded, a call drop occurs. do.

In addition, in order to eliminate such disconnection, the time delay generated in each device and transmission path in the mobile communication system is corrected by using passive elements inside the equipment so as not to deviate from the prescribed time.

Compensation of the delay time using the existing passive elements can be adjusted within the prescribed threshold time, but if the quality is severely distributed during the production process and the threshold time is out of this threshold time due to external environmental change or temperature when operating in the field Will not be compensated. That is, the above production problems and time delays due to environmental changes cannot be actively coped with, and thus there is a problem in that time delays due to external environments cannot be corrected.

Accordingly, the present invention was created to solve the above problems, and an object of the present invention is to measure the delay time in real time during transmission of a communication signal, and to compensate and transmit the measured delay time, thereby changing and producing an external environment. It is to provide a device that can correct the time delay caused in the process.

A mobile communication system capable of compensating for a time delay according to a first aspect of the present invention for achieving the above object comprises combining a forward communication signal generated from a base station and a main reference clock corresponding to a current time to generate a forward synthesized signal. A forward communication signal processor for outputting a signal, a backward synthesized signal processor for distributing a backward synthesized signal to detect first delay time data, and receiving the main reference clock and supplying it to a forward processor, wherein the first delay time data and the reference clock are supplied. And receiving a second delay time that is a delay time between the forward communication signal and the reverse synthesis signal, and controlling a transmission time of the forward communication signal according to the calculated second delay time data. Central node device; And a forward synthesized signal processing unit configured to receive and distribute the forward synthesized signal and transmit the same through a antenna, and to generate a forward synthesized signal from the sub reference clock corresponding to a current time and a main reference clock included in the forward synthesized signal. A first delay time calculating unit for calculating a first delay time, which is a delay time, and a reverse reverse communication signal received through an antenna, and synthesizing the first delay time data with the processed reverse communication signal to convert the reverse synthesized signal to the above; It consists of a remote node device including a reverse communication signal processor for transmitting to the central node device.

The system in the second oligopoly of the present invention comprises a forward communication signal processor for synthesizing a forward communication signal and a reference time signal generated from a channel card of a base station and outputting a forward synthesized signal, and distributing a reverse synthesized signal to generate a sub reference clock. A first delay for calculating a first delay time, which is a delay time generated when the forward synthesized signal is transmitted from the backward synthesized signal processor for detecting, a main reference clock corresponding to the current time, and a sub reference clock included in the reverse synthesized signal; A central node device including a time calculating unit; And a forward synthesized signal processor for receiving and distributing the forward synthesized signal and transmitting the same through a antenna, and receiving a first delay time data included in the forward synthesized signal and a reference clock corresponding to a current time. And a second delay time controller for calculating a second delay time, which is a delay time between, and controlling a reception time of the reverse communication signal according to the calculated second delay time data.

According to the present invention, a second delay time, which is a time difference between a first delay time generated when a central node device is transmitted to a remote node device and a forward synthesized signal transmitted through an antenna and a reverse synthesized signal received through an antenna, is compensated for. It is possible to eliminate the call disconnection due to the time delay generated during the transmission of the communication signal.

1 is a diagram showing the configuration of a mobile communication system according to a first embodiment to which the present invention is applied.

FIG. 2 is a diagram showing the configuration of the central node device of FIG. 1 in detail.

3 is a view illustrating in detail the configuration of the remote node device of FIG.

4 is a block diagram showing a configuration of a mobile communication system capable of compensating for a time delay according to a second embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

100: central node device 110: forward communication signal processing unit

111: forward coupling portion 112: main synthesizer

113: main transmitter 114: forward delay

120, 420: second delay time controller 121: main GPS receiver

122: main reference clock generator 123: second delay time calculator

124: control unit 130: reverse synthesis signal processing unit

131: reverse delay unit 132: main divider

133: first delay time receiving unit 134: reverse coupling unit

200: remote node device 210: forward composite signal processing unit

211: sub distributor 212: forward transmission signal processor

213: sub transmitter 214: delay time detector

220, 320: first delay time calculating unit 221: sub GPS receiver

222: sub reference clock generator 223: first delay time calculator

224: interface unit 230: reverse communication signal processing unit

231: reverse communication signal receiver 232: sub synthesizer

233: sub transmitter

Hereinafter, the present invention will be described in more detail with reference to the following examples.

1 is a block diagram showing the configuration of a mobile communication system capable of compensating for a time delay according to the present invention.

Referring to FIG. 1, a mobile communication system capable of compensating for a time delay according to the present invention includes a forward communication signal processor 110, a second delay time controller 120, and a reverse synthesized signal processor 130. The node device 100 includes a forward node 200 including a forward synthesized signal processor 210, a first delay time calculator 220, and a reverse communication signal processor 230.

Here, the forward communication signal processing unit 110, the reverse synthesis signal processing unit 130, the forward synthesis signal processing unit 210, and the reverse communication signal processing unit 230 processes the forward and reverse communication signals input through each of the transmission and reception channels. It is made of a plurality in order to. In this embodiment, it is provided to process the forward and reverse communication signals input through one channel.

The forward communication signal processor 110 receiving the forward communication signal supplied from the base station (not shown) synthesizes and transmits the forward communication signal with the main reference clock supplied from the satellite, and transmits the second delay time controller 120. And to control the output of the forward synthesized signal to compensate for the second delay time under control.

Meanwhile, the reverse synthesized signal processor 130 detects the second delay time from the reverse synthesized signal transmitted through the reverse transmission path B and is supplied to the second delay time controller 120.

The second delay time controller 120 compares the second delay time of the backward synthesized signal processor 130 with a reference clock which is the current time supplied from the satellites, and then delays the transmission of the forward communication signal and the reverse communication signal. Calculating a first delay time, which is time, and delaying transmission of the forward synthesized signal according to the calculated first delay time data.

The forward synthesized signal processor 210 is configured to distribute the forward synthesized signal transmitted through the forward transmission path A, transmit the distributed forward synthesized signal through an antenna, and detect the distributed main reference clock. do.

In addition, the first delay time calculating unit 220 compares the main reference clock of the forward synthesized signal processing unit 210 with the sub reference clock corresponding to the current time input from the satellite to determine the delay time when transmitting the forward transmission path. It is provided to calculate a first delay time.

The reverse communication signal processor 230 receiving the first delay time data processes the reverse communication signal received through the antenna, synthesizes the processed reverse communication signal and the first delay time data, and outputs a reverse synthesized signal. .

FIG. 2 is a detailed block diagram illustrating the configuration of the forward communication signal processor 110, the second delay time controller 120, and the reverse synthesized signal processor 130 of FIG. 1. That is, the forward communication signal processor 110 includes a forward combiner 111, a main synthesizer 112, a main transmitter 113, and a forward delay unit 114, and the second delay time controller 120 is provided. The main GPS receiver 121, the main reference clock generator 122, the second delay time calculator 123, and the controller 124 are provided, and the backward synthesized signal processor 130 includes a reverse controller 131 and a main distributor. 132, a first delay time receiving unit 133, and a reverse coupling unit 134.

3 is a block diagram illustrating in detail the configuration of the forward synthesized signal processor 210, the first delay time calculator 220, and the reverse communication signal processor 230 of FIG. 1, and the forward synthesized signal processor 210 is illustrated in FIG. The sub distributor 211, the forward transmission signal processor 212, the sub transmitter 213, and the delay time detector 214 are provided, and the first delay time calculator 220 is a sub GPS receiver 221 and a sub reference. And a clock generator 222, a first delay time calculator 223, and an interface unit 224. The reverse communication signal processor 230 includes a reverse communication signal receiver 231, a sub synthesizer 232, and a sub transmitter. It consists of 233.

The forward combiner 111 processes the supplied forward communication signal to be processed for transmission, and provides the processed forward communication signal to the synthesizer 112.

On the other hand, the reference time that is the current time is received through the GPS receiver 121 of the second delay time controller 120, the received reference time is supplied to the reference clock generator 122, the reference clock generator 122 Generates a main reference clock corresponding to the reference time and supplies it to the synthesizer 112.

The synthesizer 112 receiving the main reference clock and the forward communication signal synthesizes the main reference clock and the forward communication signal to output a forward synthesized signal, and the transmitter 113 receiving the forward synthesized signal has a high output amplification and a forward delay unit ( 114 to transmit to the remote node device (200).

The forward synthesized signal transmitted through the forward transmission path A is provided to the divider 211 of the remote node device 200, and the divider 211 receiving the forward synthesized signal is distributed to the forward communication signal and the main reference clock. This distributed forward communication signal is provided to the forward transmission signal processor 212, and the distributed main reference clock is provided to the delay time detector 214.

The forward transmission signal processor 212 receiving the forward communication signal linearly amplifies and transmits the signal through an antenna.

The delay detector 214 transmits the distributed main reference clock to the first delay calculator 223.

On the other hand, the current time transmitted through the satellite is provided to the sub-GPS receiver 221, the sub-GPS receiver 221 receives the transmitted time information and supplies it to the sub reference clock generator 222.

The sub reference clock generator 222 generates a sub reference clock from the current time information, and the generated sub reference clock is provided to the first delay time calculator 224.

The first delay time calculator 224 receiving the sub reference clock and the main reference clock calculates a first delay time generated in the forward transmission path by comparing the sub reference clock and the main reference clock delayed in the forward transmission path. The first delay time data is supplied to the sub synthesizer 232 of the reverse communication signal processor 230 through the interface unit 224.

Meanwhile, the reverse received signal received through the antenna is provided to the reverse communication signal receiver 231, and the reverse communication signal receiver 231 receiving the reverse communication signal filters and amplifies the reverse communication signal to amplify the sub synthesizer 232. To provide.

The sub synthesizer 232 synthesizes the amplified reverse communication signal and the first delay time data passed through the interface unit 224 to output a reverse synthesized signal, and the reverse synthesized signal is provided to the sub transmitter 233. The sub transmitter 233 linearly amplifies the backward synthesized signal and supplies it to the central node device 100 through the reverse transmission path B. FIG.

The reverse synthesized signal transmitted through the reverse transmission path B is supplied to the main divider 132 through the reverse delay unit 131, and the main divider 132 transmits the reverse transmitted signal and the first reverse signal included in the reverse synthesized signal. The data is distributed as delay data, and the reverse transmission signal is provided to the reverse coupling unit 134.

In addition, the first delay time data distributed by the main distributor 132 is provided to the first delay time receiving unit 133, and the first delay time receiving unit 133 receives the first delay time data to receive the second delay time controlling unit ( The second delay time calculator 123 of FIG.

The second delay calculator 123 receiving the reference clock corresponding to the current time and the first delay time data compares the reference clock and the first delay time data with the forward transmission path A and the backward transmission path B. Generates a second delay time, which is a time delay generated in the second delay time data, and is supplied to the controller 124.

In this case, when the delayed times in the forward transmission path A and the reverse transmission path B coincide with each other, there is no need to delay transmission of the forward synthesized signal, but when a difference occurs in each time, the forward synthesized signal Delays the transmission and reception of the backward composite signal.

That is, the control unit 124 supplies the second delay time data to the forward delay unit 114 and the reverse delay unit 131, respectively, and transmits the forward synthesized signal and the reverse transmission path (transmitted through the forward transmission path A). Correct the transmission and reception time of the backward composite signal received through B).

4 is a block diagram showing a configuration of a mobile communication system capable of compensating for a time delay according to a second embodiment of the present invention. In Fig. 4, the same parts as those in Fig. 2 are denoted by the same reference numerals, and detailed description thereof is omitted.

Referring to FIG. 4, the central node apparatus 100 includes a forward communication signal processor 110, a first delay time calculator 320, and a reverse synthesized signal processor 130, and the remote node device 200 is forward. The combined signal processor 210, the second delay time controller 420, and the reverse communication signal processor 230 are provided.

Here, the first delay time calculator 320 is provided in the same manner as the first delay time calculator 220 of FIG. 1, and the second delay time controller 420 is the second delay time controller 120 of FIG. 1. Equally provided.

Therefore, the sub reference clock, which is the current time transmitted through the satellite, is combined with the backward synthesized signal and supplied to the central node apparatus 100, and the first delay time calculating unit 320 of the central node apparatus 100 is applied to the reverse synthesized signal. The first delay time is calculated from the included sub reference clock and the main reference clock at the current time, and the calculated first delay time data is combined with the forward communication signal and transmitted through the forward transmission path A. FIG.

The forward synthesized signal processor 210 receiving the forward synthesized signal detects first delay time data included in the forward synthesized signal, and receives a second delay time control unit receiving the first delay time data and the reference clock that is the current time. 420 compares the first delay time data and the reference clock to detect delay time data in the forward transmission path A and the reverse transmission path B, and according to the detected delay time data, the forward transmission path A Correcting the transmission and reception time of the forward composite signal and the reverse composite signal received through the reverse transmission path (B).

According to the present invention described above, the delay time generated by the forward transmission path (A) and the reverse transmission path (B) is corrected.

According to the present invention, the second delay time, which is a time difference between the first delay time generated when the central node device is transmitted from the central node device to the remote node device, and the forward synthesized signal transmitted through the antenna and the reverse synthesized signal received through the antenna, Compensation can eliminate call disconnection due to time delay that occurs during transmission of communication signals.

In addition, although the present invention has been described in detail with reference to the embodiments described above, the present invention is not limited thereto, and modifications and improvements are possible within the scope of ordinary knowledge of those skilled in the art.

Claims (4)

A forward communication signal processor for synthesizing the forward communication signal generated from the base station and the main reference clock corresponding to the current time and outputting the forward synthesized signal, and a reverse synthesized signal processor for detecting the first delay time data by distributing the reverse synthesized signal; Receiving the main reference clock and supplying it to a forward processing unit, receiving the first delay time data and the reference clock, calculating a second delay time that is a delay time between a forward communication signal and a reverse synthesized signal, and calculating the second delay A central node device including a second delay time control unit controlling a transmission time of the forward communication signal according to time data; And A delay that is generated when the forward synthesized signal is transmitted forward from the forward synthesized signal processor for receiving and distributing the forward synthesized signal and transmitting the same through a antenna, a sub reference clock corresponding to a current time, and a main reference clock included in the forward synthesized signal A first delay time calculating unit for calculating a first delay time, which is a time, and a reverse reverse communication signal received through an antenna, and combining the first delay time data with the processed reverse communication signal to convert the reverse synthesized signal into the center; A mobile communication system capable of compensating for a time delay, comprising: a remote node device including a reverse communication signal processor for transmitting to a node device. The method of claim 1, wherein the second delay time control unit A main GPS receiver for receiving a current time input from the outside; A main reference clock generator for generating a main reference clock and a reference clock from a current time received from the main GPS receiver, and supplying the generated main reference clock to the forward communication signal processor to synthesize the generated main reference clock; By comparing the reference clock corresponding to the current time supplied from the main reference clock generator and the first delay time data supplied from the backward synthesis signal processing unit to calculate the difference between the delay time generated during transmission from the forward transmission path and reverse transmission A second delay calculator for generating second delay data; And And a controller configured to receive the second delay time data and correct a delay time of transmitting a forward synthesized signal and receiving a reverse synthesized signal. The method of claim 1, wherein the first delay time calculating unit A sub-GPS receiver for receiving a current time input from the outside; A sub reference clock generator for generating a sub reference clock from a current time received from the sub GPS receiver; And A first delay time data by calculating a difference between a sub reference clock corresponding to a current time supplied from the sub reference clock generator and a delay time generated during transmission of a forward transmission path by receiving the main reference clock supplied from a forward synthesized signal processor; A first delay time calculator for supplying the calculated first delay time data to a reverse communication signal processor for combining the calculated first delay time data with a reverse communication signal; And And an interface unit for interfacing the first delay time data. A forward communication signal processor for synthesizing the forward communication signal and the reference time signal generated from the channel card of the base station and outputting the forward synthesized signal, a reverse synthesized signal processor for detecting the sub reference clock by distributing the reverse synthesized signal, and at the present time. A central node apparatus including a first delay time calculating unit for calculating a first delay time corresponding to a delay time generated when a forward synthesized signal is transmitted from a corresponding main reference clock and a sub reference clock included in the backward synthesized signal; And A forward synthesized signal processor for receiving and distributing the forward synthesized signal and transmitting the same through a antenna; and receiving a first delay time data included in the forward synthesized signal and a reference clock corresponding to a current time, between the forward communication signal and the reverse synthesized signal. And a second delay time control unit for calculating a second delay time that is a delay time of the second delay time and controlling a reception time of the reverse communication signal according to the calculated second delay time data. A mobile communication system capable of compensating for time delays.