Indoor distribution base station air interface synchronization method and system

Abstract

The invention provides an indoor distribution base station air interface synchronization method and system, and the method comprises the steps: obtaining synchronization information transmitted by a synchronization source base station, determining a downlink timing reference, and intercepting wireless frame data; obtaining a signal-to-noise ratio of an initial synchronization stage based on the wireless frame data, and obtaining a signal-to-noise ratio threshold according to the signal-to-noise ratio of the initial synchronization stage; acquiring a downlink air interface signal according to a preset period, acquiring a real-time synchronization state and a frame header relative offset value of a synchronization source base station according to the downlink air interface signal, and acquiring a signal-to-noise ratio in a synchronization keeping stage; determining a timing reference adjustment strategy based on the real-time synchronization state and a comparison result of the signal-to-noise ratio in the synchronization keeping stage and a signal-to-noise ratio threshold; and if it is judged that the real-time synchronization state is out-of-step and synchronization is not recovered within the preset detection period times, self-adaptive pre-compensation is carried out. According to the invention, on the premise that the hardware cost of the base station is not increased and the implementation complexity is low, the stability of the air interface synchronization state of the indoor distribution base station in a complex environment is effectively improved, and the application scene range of the indoor distribution base station is expanded.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an air interface synchronization method and system of an indoor base station. Background technique [0002] With the rapid development of mobile communications and the improvement of mobile terminals and network conditions, mobile services have gradually transitioned from simple voice services and text services in the early days to multimedia services with richer applications, and the application scenarios have also expanded from a wide range of outdoor scenarios to Indoor coverage of hotspot scenes. [0003] The mobile communication system has high requirements on synchronization technology, among which uplink and downlink time slot alignment, high-quality and reliable data transmission, and handover between cells all need to rely on precise synchronization technology to achieve. Especially in the time division duplex communication system, all cells are required ...

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a method and system for air interface synchronization of indoor base stations, which are used to solve the problem of out-of-synchronization of the air interface due to the deterioration of the downlink signal-to-noise ratio of the synchronization frequency point when small and medium-sized or micro base stations in the prior art adopt the air interface synchronization method in the indoor division scene. unrecoverable defects

Images