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Title:
CLOCK SYNCHRONIZATION METHOD FOR CPRI TRANSMISSION DATA, AND RELATED APPARATUS
Document Type and Number:
WIPO Patent Application WO/2022/016312
Kind Code:
A1
Abstract:
Disclosed are a clock synchronization method for CPRI transmission data, and a related apparatus. A target clock period of an alignment clock is predetermined. When the target clock period is triggered, a CPRI reference clock and a CPRI slot clock are aligned, and a preset number of downlink trigger clocks is determined according to the target clock period. The method comprises: when an alignment clock is received, if CPRI needs to be re-aligned, counting the number of received downlink trigger clocks with the current moment serving as a starting point until a preset number is reached; and reconfiguring the CPRI, waiting for a CPRI reference clock, and when the CPRI reference clock is received, aligning a CPRI downlink data clock and a CPRI slot clock. By means of the above-mentioned method, a preset number is determined according to a target clock period of an alignment clock, and where the number reaches the preset number and a reference clock is received, clock synchronization is realized without the need to take a period correlation between a slot clock and the reference clock, a slot condition and the type of transmission data into consideration.

Inventors:
ZHENG JUNBO (CN)
LI ZHEN (CN)
TAN XIAO (CN)
ZHENG JINLIANG (CN)
Application Number:
PCT/CN2020/102989
Publication Date:
January 27, 2022
Filing Date:
July 20, 2020
Export Citation:
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Assignee:
HARBIN HYTERA TECH CORP LTD (CN)
International Classes:
H04J3/06
Domestic Patent References:
WO2020118627A12020-06-18
Foreign References:
CN101527959A2009-09-09
CN111181680A2020-05-19
US20120113972A12012-05-10
US20200037194A12020-01-30
Other References:
YUAN XINGMENG, CHEN LIANG, XU LANTIAN: "Research and implementation of 5G baseband data transmission technology based on CPRI protocol", ELECTRONIC ENGINEERING & PRODUCT WORLD, no. 4, 30 April 2019 (2019-04-30), XP055888341
See also references of EP 4142188A4
Attorney, Agent or Firm:
SHENPAT INTELLECTUAL PROPERTY AGENCY (CN)
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