KR101727529B1 - Communication speed correcting device for stable communication in serial communication system - Google Patents

Communication speed correcting device for stable communication in serial communication system Download PDF

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Publication number
KR101727529B1
KR101727529B1 KR1020147027964A KR20147027964A KR101727529B1 KR 101727529 B1 KR101727529 B1 KR 101727529B1 KR 1020147027964 A KR1020147027964 A KR 1020147027964A KR 20147027964 A KR20147027964 A KR 20147027964A KR 101727529 B1 KR101727529 B1 KR 101727529B1
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South Korea
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communication speed
communication
clock
data
value
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KR1020147027964A
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Korean (ko)
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KR20140147097A (en
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김진영
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김진영
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0262—Arrangements for detecting the data rate of an incoming signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/05—Electric or magnetic storage of signals before transmitting or retransmitting for changing the transmission rate
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter

Abstract

The present invention relates to a communication speed correcting apparatus for stable communication in a serial communication system and, in order to provide a communication speed correcting apparatus capable of easily realizing high-precision stable high-speed communication when communicating using a plurality of communication apparatuses do.
To this end, according to the present invention, there is provided a communication speed correcting apparatus for stable communication in a "serial communication system for starting transmission at the same time when reception of data starts ", wherein a communication speed value for communication speed calibration is obtained from input received data A communication speed value obtaining means for obtaining a communication speed value; And calibrating means for generating a communication speed calibration clock by comparing the communication speed value with the self clock coefficient result and providing the communication speed calibration clock to the transmitter / receiver.

Description

TECHNICAL FIELD [0001] The present invention relates to a communication speed correcting apparatus for stable communication in a serial communication system,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication speed correcting apparatus for stable communication in a serial communication system, and more particularly, to a communication speed correcting apparatus for a communication system in which, when communicating using a plurality of communication apparatuses (transmitting / (Communication speed correction clock value) for calibrating the communication speed by using the data transmitted from the communication device and then performs reception and transmission in accordance with the communication speed calibration clock value to obtain a stable high-speed And more particularly, to a communication speed correction apparatus that enables communication.

The serial communication system in the present invention means a serial communication system that starts transmission at the same time when reception of data starts.

Conventional asynchronous serial communication devices use a crystal (X-TAL) (quartz oscillator) or a crystal oscillator (X-TAL oscillator) to prevent communication errors in high-speed communication and an RC oscillator Were used.

Asynchronous high-speed communication uses a high-precision oscillator such as a crystal oscillator (X-TAL), which increases the number of components and increases the cost. On the other hand, in the asynchronous low-speed communication, by using an RC oscillator There is a problem in that it is difficult to perform high-speed communication.

In order to solve such a problem, a method of measuring the reception time of one bit, a method of measuring the reception time of one byte, a method of measuring the time of a received data pair, A method of calibrating the communication speed has been developed. However, when the communication devices are continuously connected, it is difficult to know the transmission delay time of each communication device, and therefore it is very difficult to calibrate the communication speed at the same time.

In order to solve such a problem, a clock correction device for serial communication, a serial communication-based lighting module and a static display system using the same, and the like disclosed in the patent application No. 10-2011-0121522, 2011 Disclosed on Nov. 07 discloses that it is difficult to freely change the communication speed in high-speed communication, instead of obtaining and using a clock value for communication, after correcting the clock of the oscillation device and communicating with it.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a communication speed correction apparatus capable of easily realizing high-precision stable high-speed communication when communication is performed using a plurality of communication apparatuses.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention which are not mentioned can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

According to an aspect of the present invention, there is provided a communication system including a plurality of communication apparatuses (transmission / reception apparatuses), each communication apparatus performing communication speed calibration using data transmitted from a main communication apparatus (Communication speed calibration clock value), and then controls reception and transmission using the communication speed calibration clock value.

More specifically, the present invention relates to a communication speed correcting apparatus for stable communication in "a serial communication system that starts transmission at the same time when reception of data starts," comprising: a communication speed correcting device for calculating a communication speed value for communication speed correction from received input data A communication speed value obtaining means for obtaining a communication speed value; And calibrating means for generating a communication speed calibration clock by comparing the communication speed value with the self clock coefficient result and providing the communication speed calibration clock to the transmitter / receiver.

The above-described embodiments of the present invention provide a serial communication system that starts transmitting data at the same time as reception of data starts, and can precisely and freely communicate the communication speeds of a plurality of communication devices without using a high precision oscillator such as an X- It is possible to realize high-speed and stable communication in a simple and inexpensive manner.

That is, in the present invention, when communication is performed using a plurality of communication apparatuses (transmission / reception apparatuses), each of the communication apparatuses transmits a clock value for calibrating the communication speed using the data transmitted from the main communication apparatus Communication speed calibration clock value), and then performs reception and transmission in accordance with the communication speed correction clock value. Thus, there is an effect that stable high-speed communication without communication error is enabled.

Particularly, according to the present invention, a clock value corresponding to a communication speed is obtained without using a clock correction method in communication, and a communication error can be remarkably reduced, thereby enabling a more stable high-speed communication.

1 is an explanatory diagram of a transmission delay of asynchronous communication in a "serial communication system that starts transmission at the same time when reception of data starts " according to the present invention;
2 is a diagram for explaining an embodiment of a method of obtaining a clock value using data received in a "serial communication system for starting transmission at the same time as reception of data starts" according to the present invention;
3 is a block diagram of a communication speed correcting apparatus for stable communication in a "serial communication system for starting transmission at the same time when data reception starts" according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

And throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between. Also, when a component is referred to as " comprising "or" comprising ", it does not exclude other components unless specifically stated to the contrary .

Generally, in the case of the asynchronous communication method, a high precision oscillator such as a crystal (X-TAL) oscillator is used because a high communication speed is required to communicate with a plurality of transmitting / receiving devices at high speed.

1 is an explanatory diagram of a transmission delay of asynchronous communication in a "serial communication system that starts transmission at the same time when reception of data starts " according to the present invention.

In the case of transmitting data in asynchronous serial communication, for example, when a start bit of 1 bit and a stop bit of 1 bit are inserted and transmitted for each 8-bit data, Transmission of a transmission scheme that starts transmission of data at the same time that reception of data starts is performed by transmitting data at its own communication rate to the remaining bits other than the reception start bit. That is, according to the present invention, when the start bit is detected from among the received data inputted from the outside, the transmission method of starting the transmission at the same time when the reception of the data starts is started, the transmission of the start bit of the transmission target data is immediately started, And transmits it to the outside at its own communication speed.

That is, the reception of the bits of data is influenced by the previous communication device, but the received data interval is controlled by the main communication device.

As shown in FIG. 1, in the case of the above-mentioned "transmission method in which transmission starts at the same time when reception of data starts," The difference of the entire communication interval caused by the difference in the communication interval can be canceled by the stop bit. That is, even if the next start bit (Next Start Bit) is received before the stop bit is completed (before the transmission is completed), the next start bit is transmitted immediately. Therefore, The problem due to the difference in the communication speed of the device and the asynchronism of transmission / reception can be overcome.

Fig. 1 (a) shows a case where the transmission / reception speed is matched, Fig. 1 (b) shows a case where the transmission speed is later than the reception speed, Is solved by the change of the stop bit (100, 101). Here, the transmission speed represents the communication speed of the transmission unit, and the reception speed represents the communication speed of the reception unit.

When "start transmission of data at the same time as starting reception of data" starts, there is a slight delay (transmission delay) but the time can be accurately transmitted irrespective of communication speed. On the other hand, if the "transmission after data reception" is performed, in addition to the transmission delay, it is difficult to accurately transmit the time because the communication speed error and the transmission / reception phase difference affect the transmission speed. For example, in a communication system using a transmission / reception apparatus of a transmission system in which transmission starts at the same time when 1,000 "data starts to be transmitted at a transmission rate of 1 Gbps each, each transmission / reception apparatus has a transmission rate of 0.1-0.12 ns , The total transmission delay time is 100-120 nS, and the maximum error is 20 nS. The maximum error is 20 nS / 1 uS (1 / 50,000) to the last transmitting / receiving device. Lt; / RTI > When a transmission is stopped in any one of the transmitting / receiving devices, all subsequent transmitting / receiving devices within 100 to 120 nS, which is the total transmission delay time, and 1 nS, which is a transmission time of about 1 bit (ie, within 101 nS to 121 nS) It can be seen that the communication is interrupted. If the communication speed is calibrated at intervals of 1 uS, the communication speed calibration can be performed at 1,000,000 times per second since the calibration is performed at a maximum of 1,000,000 times per second. Therefore, due to various changes such as changes in ambient / Even if the oscillation frequency of the oscillator is rapidly changed, it can be actively coped with. In other words, it becomes stable enough that communication error (error) does not occur only for the next 1 uS after communication speed calibration.

FIG. 2 is a diagram for explaining an embodiment of a method of obtaining a clock value using data received in a "serial communication system for starting transmission at the same time as reception of data starts" according to the present invention, And a period is used as a synchronization signal to obtain a clock value.

In the present invention, when communication is performed using a plurality of "communication devices that start transmitting data at the same time as reception of data starts" (simply referred to as "transmitting / receiving devices"), ) Communication device using the data transmitted from the communication device, and performs subsequent data transmission / reception in accordance with the corrected communication speed (for example, the communication speed correction clock value).

That is, in the present invention, a high-precision oscillator (for example, an X-TAL oscillator) that only provides a stable clock is used as a main communication apparatus that manages communication, and the remaining communication apparatuses (transmission / (Transmission / reception device) through a serial communication method. At this time, the remaining communication devices other than the main communication device measure the communication speed using the received data To obtain a clock value.

The method of obtaining the clock value according to the present invention includes a method of measuring time (clock) during counting of received data (Data), a method of measuring time (clock) between separate synchronous signals, And a method of measuring a time (clock) using a signal line. Here, the sync signal can be used by coding a section in which no data or data is input.

3 is a block diagram of a communication speed correcting apparatus for stable communication in a "serial communication system for starting transmission at the same time when data reception starts" according to the present invention.

The communication speed correcting device 32 according to the present invention includes a communication speed value obtaining unit 321 and a communication speed correcting unit 322 as shown in FIG. Hereinafter, each component will be described in detail.

3, the communication speed value obtaining unit 321 obtains a communication speed value for communication speed correction from input reception data, and includes a synchronous signal detector 3211, a first clock counter 3212, And a speed calculator 3213.

That is, the communication speed value obtaining section 321 includes a synchronous signal detector 3211 for detecting a synchronous signal from the received data, and a section between the detected synchronous signals is counted by its own clock outputted from the oscillator 30, (The number of clocks per bit, that is, Clocks / Bit) by dividing the clock value by a self-communication rate (i.e., the communication speed of each transmitting / receiving apparatus itself) And a speed calculator 3213 for calculating a communication speed value corresponding to the communication speed. Here, the oscillator 30 does not provide a high-precision clock such as an X-TAL oscillator, but merely provides an oscillation signal (clock signal) of a constant frequency.

More specifically, when the synchronizing signal detector 3211 detects a synchronizing signal from the received data, the first clock counter 3212 outputs the synchronizing signal output from the oscillation output from the oscillator 30 and the detected synchronizing signal, The measurement periods 200 and 201 between the detected synchronous signals are used as a clock output from the oscillator 30 to express the clock as a self clock ) To obtain a clock value.

The communication speed value acquisition unit 321 may be configured to measure the time (clock) during the counting of the received data (Data) in addition to the above-described method (synchronous signal using method) (Clock) is measured using a communication speed synchronizing signal line or a method of measuring a time (clock) using a separate communication speed synchronizing signal line, and the clock value is calculated using the communication speed (for example, expressed as the number of clocks per bit Can be obtained.

Next, the communication speed calibration unit 322 will be described.

The communication speed correcting unit 322 generates a communication speed correcting clock SIO-CLK by comparing the communication speed obtained by the communication speed value obtaining unit 321 with its own clock. As shown in FIG. 3, 2 clock counter 3221 and a comparator 3222.

The second clock counter 3221 counts its own clock output from the oscillator 30 and the comparator 3222 compares the communication speed obtained by the communication speed value acquiring unit 321 and the count by the second clock counter 3221 Generates a communication speed calibration clock SIO-CLK through comparison of the results, and provides it to a transmitter / receiver (not shown). Accordingly, the transmitter / receiver unit performs a subsequent data transmission / reception process in accordance with the communication speed calibration clock SIO-CLK, and accordingly sets the communication speed calibration clock to "SIO-CLK" .

As described above, the present invention in which the value of the clock corresponding to the communication speed in the communication is obtained and used is advantageous in reducing the communication error as compared with the method of correcting the clock. In particular, when the value of the clock is used as in the present invention, the value of the clock corresponding to the communication speed can be obtained to the decimal point or less, and the accuracy of the error is very slow. Especially, when the communication speed is 2-3 times or less than that of the oscillation device, it is possible to communicate with a very stable communication at any communication speed. Therefore, the own clock does not have to be precise, and the error becomes smaller as the own clock becomes faster than the communication speed. The present invention can freely and precisely change the communication speeds of all subsequent communication apparatuses at the same time by changing a section or a communication speed between synchronizing signals in a main communication apparatus.

In order to use this clock correction method for a transmission method other than the "transmission method for starting transmission at the same time as the reception of data starts", it is necessary to solve the problem of "how to accurately transmit clock correction time".

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various permutations, modifications and variations are possible without departing from the spirit of the invention.

Therefore, the scope of the present invention should not be construed as being limited to the embodiments described, but should be determined by the scope of the appended claims, as well as the appended claims.

The present invention can be used for high-speed communication for high-speed data transmission / reception in a "serial communication system for starting transmission at the same time when reception of data starts ".

Claims (6)

1. A communication speed correcting apparatus for stable communication in a serial communication system that starts transmitting data at the same time when receiving data starts,
A communication speed value acquiring means for acquiring a communication speed value for communication speed calibration from input reception data; And
And calibration means for generating a communication speed calibration clock by comparing the communication speed value with the self clock coefficient result and providing the communication speed calibration clock to the transmission / reception unit,
Wherein the communication speed value acquiring means comprises:
A synchronization signal detecting means for detecting a synchronization signal from the received data;
A first clock coefficient means for counting a period between the detected synchronization signals by a self clock output from an oscillator to obtain a clock value; And
Calculating means for calculating a communication speed value corresponding to the number of clocks per bit by dividing the obtained clock value by its own communication speed,
And a communication speed correcting device.
delete delete The method according to claim 1,
Wherein the first clock coefficient means comprises:
A method of measuring time during counting of received data (Data), a method of measuring time between separate synchronous signals, and a method of measuring time using a separate communication speed synchronous signal line A communication speed calibrating device used.
The method according to claim 1,
The synchronizing signal includes:
A communication speed correcting device represented by data obtained by coding data or an interval in which no data is input.
The method according to claim 1,
The calibration means includes:
Second clock counting means for counting a self clock output from the oscillator; And
Comparing means for generating a communication speed calibration clock by comparing the calculated communication speed value and a count result by the second clock counting means and providing the same to the transmitter / receiver;
And a communication speed correcting device.
KR1020147027964A 2012-04-18 2012-04-18 Communication speed correcting device for stable communication in serial communication system KR101727529B1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006121490A (en) * 2004-10-22 2006-05-11 Victor Co Of Japan Ltd Moving image predicting encoding device
KR100683582B1 (en) * 2007-01-04 2007-02-16 주식회사텔레맥스 Data transmission speed transferring apparatus

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005042344A (en) * 2003-07-24 2005-02-17 Hideo Murakami Synchronous light-emitting device using standard wave, and synchronous light-emitting delineator system using the device
KR100859807B1 (en) * 2004-09-23 2008-09-24 삼성전자주식회사 Apparatus and method for providing the clock signal
KR100719343B1 (en) * 2005-02-28 2007-05-17 삼성전자주식회사 Serializer of generating serial clock based on independent clock source and the method of data serial transmission
KR20110121522A (en) * 2010-04-30 2011-11-07 김성규 Apparatus of clock calibration for serial communication, and illumination module and static display system based serial communication using the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006121490A (en) * 2004-10-22 2006-05-11 Victor Co Of Japan Ltd Moving image predicting encoding device
KR100683582B1 (en) * 2007-01-04 2007-02-16 주식회사텔레맥스 Data transmission speed transferring apparatus

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