A method and device for information synchronization
A technology for synchronizing information and synchronizing information, applied in the field of passive optical network, can solve the problems of reducing bandwidth efficiency, increasing the length of signal preamble, reducing the quality of data transmission, etc., and achieving the effect of improving quality and avoiding length requirements
Active Publication Date: 2021-09-07
HUAWEI TECH CO LTD
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However, the synchronization information length required by the access network system has a great correlation with the signal quality: the longer the synchronization information length will reduce the quality of data transmission, for example, reduce the bandwidth efficiency; it also increases the preamble of the signal in the uplink transmission. code length requirements
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[0144] The embodiment of the present application provides an information synchronization method and device, and the information synchronization method and device are used in an access network system in which an equalizer exists. There is no equalizer, such as DSP, in the currently deployed access network system. DSP is an important role in ensuring the quality of physical signal transmission in future 50G PON or higher-speed access network systems. In a passive optical network (PON), including multiple optical network units (ONU) and optical line terminals (OLT), ONU sends physical signals, physical signals, such as figure 1 As shown, the physical signal includes a preamble and a payload; the preamble includes synchronization information and training information, and the payload is used to carry valid data. In this embodiment of the present application, the physical signal sent by the ONU can be understood as a data sequence sent by the ONU. The data sequence includes a pream...
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An embodiment of the present application provides a method and device for synchronizing information. The method includes: the optical line terminal OLT receives the first physical signal sent by the optical network unit ONU; Determining the synchronization related information between the second synchronization information in the first physical signal and the preprocessed first synchronization information; wherein, the first synchronization information is pre-stored in the OLT, and the second synchronization information is located at the leading edge of the first physical signal code; when the synchronization related information satisfies the preset threshold, the OLT determines that the second synchronization information is synchronized with the preprocessed first synchronization information. This method uses the first synchronization information which is shorter than the length of the local synchronization information in the traditional technology, and determines the synchronization related information according to the preprocessed first synchronization information and the received first physical signal, which improves the correlation between the second synchronization information and the pre-processed synchronization information. The synchronization accuracy of the processed first synchronization information improves the rate and quality of the physical signal during transmission.
Description
technical field [0001] The present application relates to the field of passive optical networks, and in particular to an information synchronization method and device. Background technique [0002] In recent years, broadband access technology has developed rapidly. Gigabit passive optical network (GPON), Ethernet passive optical network (ethernet passive optical network, EPON) and other networks have completed large-scale popularization and rapid expansion. 10G PON has also entered the stage of large-scale deployment. At the same time, the next-generation PON is gradually being formulated and improved, and its transmission rate will be significantly improved. For this reason, the International Telecommunication Union (ITU) established 50G PON in 2018. [0003] Digital signal processing (DSP) will play an important role in 50G PON or higher-speed access network systems. Because, in the process of high-speed transmission, the transmitted signal is easy to be distorted, in or...
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IPC IPC(8): H04L7/00H04L5/00
CPCH04L5/0048H04L7/0075
Inventor 张阔周雷李胜平
Owner HUAWEI TECH CO LTD