A clock synchronization method and device

Abstract

The invention discloses a clock synchronization method and a device, wherein the method and the device are applied to a micromicro base station (HeNB). The method and the device comprise that a standard base station is selected from adjacent base stations, a clock of the standard base station serves as a standard clock, a system clock is adjusted according to the standard clock; and clock precision level of the adjacent base stations are obtained, the signal strength and the path delay of time of the adjacent base stations are measured, weighing calculation is conducted on the path delay of time according to the signal strength and the clock precision levels of the adjacent base stations, and the system clock is adjusted according to the result of the weighing calculation. Due to the fact that two aspects of coarse adjustment and fine adjustment are conducted on the system clock, synchronization precision of the clocks of the micromicro base station is improved, descending and ascending interference between two adjacent micromicro base stations and between the micromicro base station and a macro station in the prior art is reduced, and accumulation of errors in the process of synchronization is reduced.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a clock synchronization method and device. Background technique [0002] LTE (Long Term Evolution, Long Term Evolution) is the next-generation mainstream mobile communication standard in the world after the third-generation mobile communication. rd Generation Partnership Project (3rd Generation Partnership Project) organization conducts feasibility research and standardization as a long-term evolution technology of the third generation of mobile communications. The research and standardization of LTE and its enhanced version LTE-Advanced are supported by global operators and equipment the broadest support and participation of the business community. The LTE system is based on Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMI) technologies, and fully adopts and optimizes packet data transmission in mobile communicatio...

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Problems solved by technology

[0007] However, since HeNBs are generally deployed indoors and are greatly affected by buildings, the phenomena of wireless signal diffraction, reflection, and refraction are common, and they are often located at the edge of eNB coverage of macro base stations. In addition, HeNBs are often very close to each other. Therefore, each The actual signal path delay measurement deviation between the HeNB and the reference macro base station is relatively large, so it may cause serious uplink interference or serious downlink interference between adjacent base stations HeNB, such as figure 1 shown

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