Dynamic Antenna Recycling Across Component Carriers for CSI Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless communication systems face inefficiencies in antenna utilization and channel estimation due to fixed antenna configurations, leading to inaccurate downlink channel estimation and sounding reference signal transmissions when switching between different component carriers.
Innovation Solution
Implementing a system that allows for dynamic antenna recycling and configuration across component carriers, enabling accurate CSI reporting and SRS transmission by adjusting the number and configuration of antennas based on switching scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed antenna configurations are used for each component carrier, then device complexity is reduced and ease of operation is improved, but downlink channel estimation accuracy deteriorates and uplink transmission efficiency deteriorates when switching between component carriers
Solution Approach 1:
The patent implements dynamic antenna configuration where the UE can switch between different antenna sets based on the active component carrier. The antenna configuration is no longer fixed but adapts dynamically to the serving CC, allowing accurate channel estimation for each carrier while maintaining manageable complexity through standardized switching procedures controlled by network signaling.
Solution Approach 2:
The patent changes the antenna configuration parameters (number of antennas, antenna indices) based on the component carrier being served. Different parameter sets are defined for different CC scenarios, and the appropriate parameters are selected dynamically, enabling accurate channel estimation adapted to each carrier's characteristics without requiring permanently complex hardware configurations.
2Measurement precision
If antennas are dedicated to specific component carriers, then channel estimation accuracy for each carrier is improved, but antenna utilization efficiency deteriorates and device complexity increases when switching between carriers
Solution Approach 1:
The patent makes antennas universal by allowing the same physical antenna to serve multiple component carriers at different times. The antenna resource is not dedicated to a single CC but can be allocated dynamically to different CCs based on switching events, achieving both accurate channel estimation (when the antenna is properly configured for the active CC) and high utilization efficiency (through shared usage across multiple CCs).
Solution Approach 2:
The patent implements a discard-and-recover mechanism where antenna configurations are discarded when switching from one component carrier to another, and new configurations are recovered/established for the target CC. This allows the system to optimize antenna usage for each specific carrier while maintaining overall efficiency through systematic reconfiguration rather than permanent dedication.
3Reliability
If antenna configurations are optimized for accurate channel estimation, then downlink reception quality is improved, but uplink transmission efficiency deteriorates due to mismatched SRS configurations when switching component carriers
Solution Approach 1:
The patent implements feedback mechanisms where the network receives channel state information from the UE based on downlink channel estimation, and uses this feedback to optimize both downlink and uplink configurations. The SRS (Sounding Reference Signal) configurations are adjusted based on feedback about the actual channel conditions and antenna usage, ensuring that uplink transmission efficiency is maintained even when antenna configurations change during component carrier switching.
Solution Approach 2:
The patent performs preliminary configuration of SRS resources and antenna settings before component carrier switching occurs. By pre-configuring the uplink transmission parameters based on the anticipated antenna configuration after switching, the system avoids mismatches between downlink estimation and uplink transmission, maintaining both downlink reception quality and uplink transmission efficiency without requiring reactive adjustments that would cause delays.
Data Source
AI summary
Aspects described herein relate to recycling transmit or receive antennas from one band to another and accordingly modifying certain operations, which may include channel state information (CSI) reporting, sounding reference signal (SRS) transmission, and/or the like.