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A coding format and coding method of time-frequency synchronization state information based on irig‑b

A technology of time-frequency synchronization and coding method, which is applied in the directions of synchronization devices, multiplexing communication, time-division multiplexing systems, etc., and can solve the problems of inability to transmit time synchronization status information.

Active Publication Date: 2017-07-25
DATANG TELECOM TECH CO LTD
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Problems solved by technology

[0003] The purpose of the present invention is to solve the above problems, provide a kind of IRIG-B-based time-frequency synchronization status information encoding format and encoding method, the encoding method is improved by adjusting the encoding method of IRIG-B, the IRIG-B symbol Redefining some bytes can solve the problem of time synchronization state information transmission, and solve the problem that the existing IRIG-B encoding method cannot transmit some key time synchronization state information

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  • A coding format and coding method of time-frequency synchronization state information based on irig‑b
  • A coding format and coding method of time-frequency synchronization state information based on irig‑b
  • A coding format and coding method of time-frequency synchronization state information based on irig‑b

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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the drawings:

[0022] See figure 1 , The present invention re-encodes P80-P88 and P90-P98 in the IRIG-B code in the IEEESTD1344-1995 standard based on the IRIG-B time-frequency synchronization status information encoding format. The specific symbol definitions are as follows:

[0023] P80-P88: Represents the number of seconds in a day, expressed in binary, a total of 17 digits, the lower 9 digits;

[0024] P90-P97: Represents the number of seconds in a day, expressed in binary, a total of 17 digits, the upper 8 digits;

[0025] P80: Leap second sign bit, ‘1’ means positive leap second; ‘0’ means negative leap second; the range of leap second is 0~255.

[0026] P81-P88: The number of leap seconds between the current international atomic time and UTC time, expressed in binary, with P81 being the lowest bit and P88 being the highest bit;

[0027] P90-P93: Current time-frequency synchronization device...

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Abstract

The invention discloses an IRIG-B-based time and frequency synchronization state information coding format and coding method. Through regulating and improving an IRIG-B coding method and redefining partial bytes of an IRIG-B code element, the time synchronization state information transmission can be realized, the problem that an existing IRIG-B coding method cannot transmit some key time synchronization state information is solved, and accordingly each node in a time synchronization network can monitor leap seconds, time service sources, time quality and frequency quality.

Description

Technical field [0001] The invention relates to an IRIG-B-based time-frequency synchronization status information coding format and coding method. Background technique [0002] An important coding format for transmitting time synchronization information is IRIG-B code. IRIG-B encoding follows the IEEE Std1344-1995 standard, and explains the filling method of time information in IRIG-B. Downstream devices can obtain accurate time information from the information in IRIG-B. However, this encoding method cannot transmit some key time and frequency synchronization status information, which is mainly manifested in the following aspects: 1. Only leap seconds can be announced, but downstream devices cannot obtain the current specific leap seconds. 2. The downstream equipment cannot obtain the reference source of the current IRIG-B code. 3. Although IEEEStd1344-1995 stipulates the time quality byte, it cannot meet the current transmission network's description requirements for time qua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L7/00H04J3/06
Inventor 黄成
Owner DATANG TELECOM TECH CO LTD
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