Base Station Synchronization Using User Equipment Feedback
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Solution Overview
Problem
Existing base station synchronization technologies have a limited applicable range and are primarily designed for synchronization between low-power and high-power base stations, failing to address interference between cells of different wireless networks effectively in heterogeneous networks.
Innovation Solution
A method and system where a base station adjusts its downlink sending and uplink receiving time points based on synchronization information from user equipment, ensuring consistency with a reference base station's time points, thereby achieving synchronization without relying on the coverage area of the adjusting base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If synchronization is performed only between low-power base station and high-power base station, then synchronization can be achieved in traditional networks, but the applicable range is limited and cannot cover heterogeneous network scenarios
Solution Approach 1:
The patent makes the user equipment serve as a universal synchronization reference for all base stations, regardless of power level or network type. The UE measures downlink signals from multiple base stations and provides synchronization information that can be used by any base station needing synchronization, making the method universally applicable to heterogeneous networks including macro cells, pico cells, and femto cells
Solution Approach 2:
The patent introduces user equipment as an intermediary between base stations for synchronization. The UE measures downlink signals from reference base stations and other base stations, then provides synchronization information (time difference, frequency difference) to base stations that need synchronization, acting as a mediator that enables synchronization without direct base station-to-base station communication
2Reliability
If traditional synchronization methods are used, then synchronization between specific base station pairs can be achieved, but interference between cells of different wireless networks cannot be effectively coordinated
Solution Approach 1:
The patent implements a feedback mechanism where user equipment measures and reports synchronization information (time difference, frequency difference) between base stations to the network. This feedback enables the network to identify and coordinate interference between cells by adjusting resource allocation based on the measured synchronization parameters, effectively coordinating interference across different wireless networks
Solution Approach 2:
The user equipment serves as an intermediary that measures and reports synchronization parameters between base stations operating in different networks. This intermediary role enables the network to detect and coordinate interference between heterogeneous networks that would otherwise be difficult to manage, extending interference coordination capability beyond traditional single-network scenarios
Data Source
AI summary
The present invention provides a method, an apparatus, and a system for synchronization between base stations. The method for synchronization between base stations includes: A first base station receives synchronization information sent by a user equipment, where the first base station is a serving base station of the user equipment; and the first base station adjusts a downlink sending time point and an uplink receiving time point of the first base station according to the synchronization information, so as to keep consistency between the downlink sending time point of the first base station and a downlink sending time point of a second base station that serves as a synchronization time reference and keep consistency between the uplink receiving time point of the first base station and an uplink receiving time point of the second base station.