Uplink Beamforming Synchronization for MIMO Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In MIMO systems, uplink signal transmission failures occur due to mismatched beamforming directions between User Equipment (UE) and Base Station (BS), leading to suboptimal transmission performance.
Innovation Solution
A new uplink signal transmission scheme using beamforming is proposed, where the UE performs beamforming synchronization with the BS, selects optimal transmission antenna beams, identifies symbol locations and beam identifiers, and transmits uplink signals using these identifiers to ensure matching beamforming directions, thereby improving transmission performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If beamforming technology is used in MIMO system for uplink signal transmission, then transmission capacity gain is obtained through diversity gain and multiplexing gain, but beamforming direction mismatching occurs between UE and BS leading to transmission failure
Solution Approach 1:
The patent applies preliminary action by performing beamforming synchronization before uplink signal transmission. The UE identifies the beamforming direction of the BS in advance through downlink signal reception and beam measurement, then uses this pre-acquired beam information to configure uplink transmission beams, ensuring beam direction matching before actual data transmission occurs.
Solution Approach 2:
The patent implements feedback mechanisms where the BS provides downlink beamforming reference signals that the UE measures to determine optimal beam directions. The UE feeds back beam measurement results and selected beam identifiers to the BS, enabling the BS to adjust its beamforming configuration based on actual channel conditions and UE reception capabilities, thereby maintaining reliable bidirectional beam alignment.
2Reliability
If beamforming synchronization is performed for each symbol within radio resource, then beamforming direction matching is achieved, but system complexity increases due to detailed synchronization requirements
Solution Approach 1:
The patent applies segmentation by dividing beamforming synchronization into distinct functional modules: a beamforming synchronization unit for acquiring beam directions, a selection unit for choosing optimal beams, an identification unit for determining symbol locations and beam identifiers, and a signal transmission control unit for coordinating transmission. This modular approach manages complexity through structured organization of synchronization tasks.
Solution Approach 2:
The patent implements partial action by performing beamforming synchronization selectively for each symbol within radio resource rather than continuously for all transmissions. The system identifies specific symbol locations where beam synchronization is needed and applies beamforming configuration only at those points, reducing overall computational burden while maintaining necessary beam alignment.
Data Source
AI summary
The present invention relates to an uplink signal transmission for an access between a base station and a terminal in an MIMO system, and provides an uplink signal transmission device and an uplink signal transmission method, which can improve, using beamforming, uplink signal transmission performance.