Time delay adjustment value obtaining method and device

Abstract

The invention discloses a time delay adjustment value obtaining method and device. The method comprises steps of an extension unit obtaining optical fiber time delay between each far end and each nearend in an optical fiber distributed system and CA time delay of each data transmission channel; sending a first maximum optical fiber time delay and a first maximum CA time delay to the near end according to the optical fiber time delay and the CA time delay; receiving second maximum optical fiber time delay, second maximum CA time delay and preset time delay configuration information broadcast by the near end; configuring the second maximum optical fiber time delay according to the preset time delay configuration information to obtain the target optical fiber time delay of the system; obtaining a CA time delay compensation value of each data transmission channel according to the second maximum CA time delay and the CA time delay of each data transmission channel; and sending the target optical fiber time delay of the optical fiber distributed system and the CA time delay compensation value of each data transmission channel to each far end, so that each far end obtains a time delay adjustment value. According to the method, the real-time performance and convenience of time delay alignment are improved, and the cost is reduced.

Description

technical field [0001] The present application relates to the field of communication technologies, and in particular to a method and device for acquiring a delay adjustment value. Background technique [0002] The current optical fiber distribution system (or "fiber distribution network") directly or indirectly connects the near end (or "master station") and at least one remote end (or "slave station") through optical fiber. Since the physical distance between each remote end and the near end in the optical fiber distributed system is different, and the length of the optical fiber is different, resulting in different delays in the data transmitted by different remote ends, so in order to make the data transmission delay in the entire optical fiber distributed system the same (or "delay alignment"), especially when the same frequency band is covered by different data transmission channels to achieve delay alignment. Currently, there are generally two ways: [0003] The first...

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Problems solved by technology

[0005] However, the inventor found that the delay alignment scheme of the above-mentioned method 1 not only increases the system cost and labor cost, but also cannot perform delay alignment in real time; the above-mentioned scheme 2 delay alignment scheme not only has restrictions on the professional knowledge of the implementers, but also increases labor costs , and it is inconvenient to operate

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