Title:
SYNCHRONIZATION SYSTEM AND METHOD FOR SINGLE-BUS TRANSMISSION OF 1PPS+TOD INFORMATION
Document Type and Number:
WIPO Patent Application WO/2018/205542
Kind Code:
A1
Abstract:
Provided are a synchronization system and method for single-bus transmission of 1PPS+TOD information, which relate to the field of clock synchronization. A sending end sets, via a first sampling module, the number of times of sampling a local TOD per second, a framing module forms sampled TOD information into a TOD frame, and after a check field is generated by a check module and the frame is coded by a coding and sending module, the frame is sent to a receiving end serially; after a clock is recovered from a TOD serial data stream by a phase-locked loop frequency-doubling module at the receiving end, a second sampling module uses the recovered clock, or a serial TOD is directly sampled by a local clock, and after frame synchronization is completed by a frame synchronization module, decoding, deframing and frame checking are carried out; when a check result of the TOD frame is correct and the frame is not lost, the local TOD is updated by a TOD maintenance module using a correct TOD; and when the TOD frame is lost or the check result is incorrect, synchronization is completed by adding ΔX to the most recently received correct TOD. In the present invention, 1PPS+TOD information is transmitted via a single bus, and thus, backplane bus resources are saved on, and the stability of communication is improved.
Inventors:
LI ZHENGHUI (CN)
LIU FU (CN)
LIU FU (CN)
Application Number:
PCT/CN2017/111567
Publication Date:
November 15, 2018
Filing Date:
November 17, 2017
Export Citation:
Assignee:
FIBERHOME TELECOMMUNICATION TECH CO LTD (CN)
International Classes:
H04J3/06; H04L12/40
Domestic Patent References:
| WO2012003481A1 | 2012-01-05 |
Foreign References:
| CN107171762A | 2017-09-15 | |||
| CN105262565A | 2016-01-20 | |||
| CN103401672A | 2013-11-20 | |||
| CN102264011A | 2011-11-30 | |||
| CN102394715A | 2012-03-28 |
Attorney, Agent or Firm:
WUHAN ZHI QUAN PATENT AGENCY (CN)
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