A method for dynamic adjustment of tree structure time delay in deep signal coverage

Abstract

A method for dynamically adjusting the delay of a tree structure in deep signal coverage, including obtaining the fiber delay value from the tree root node to itself for each node in the tree structure, and counting the maximum fiber delay from the tree root node to the last stage of the link value, as the maximum fiber link delay of the entire network; the root node of the tree is used as a reference point for delay adjustment, and the root node broadcasts the maximum fiber link delay of the entire network to each leaf node, and each leaf node calculates the maximum fiber link delay of the entire network respectively. The difference Ta between the link delay and the fiber delay value from the tree root node to itself, and the difference between Ta and its own current set delay value Ts, if the absolute value of the difference is 0 or less than the preset threshold, then no It needs to be adjusted, otherwise, replace the set delay value from Ts to Ta. The invention solves the problem of time delay adjustment in signal coverage of complex tree topological structure, has high precision, short time required for whole network adjustment, can be expanded and improved, and the impact of time delay adjustment on adding or removing branches to the topological network is minimized .

Description

technical field [0001] The invention belongs to the technical field of telecommunication, and in particular relates to a time delay adjustment method adopted in signal coverage in near and far end digital repeaters connected by optical fibers. Background technique [0002] Each set of traditional digital optical fiber repeater consists of a near-end device AU and multiple remote radio equipment RRU connected by optical fiber. Each near-end includes multiple remote optical ports, and each remote optical port can drag a A cascaded radio frequency link formed by optical fiber physical connection at the two remote ends realizes open signal coverage for different distance areas; due to the characteristics of radio frequency signal coverage, there must be overlapping coverage areas of two or more RRUs in order to achieve no dead angle coverage , if delay adjustment is not performed, user terminals in this area may be unusable. Existing delay adjustment is mainly used in single-cha...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings and deficiencies of the prior art, aiming at signal coverage in large-area buildings, and solve the problem of time delay adjustment in signal coverage of complex tree topological structures

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