CoMP Feedback Indicator for Wireless Resource Optimization
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Solution Overview
Problem
In coordinated multi-point (CoMP) operations of wireless communication systems, there is a challenge in determining when to provide CoMP channel state information (CSI) feedback, as transmitting CSI feedback when CoMP is not used can waste uplink resources and offer no benefits.
Innovation Solution
A feedback indicator is generated to recommend whether multi-point feedback information should be signaled to the CoMP controller entity, allowing for efficient use of resources by determining when CoMP CSI feedback is beneficial, which can be implemented in user equipment and radio access nodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If CoMP CSI feedback is transmitted continuously, then channel state information availability is improved, but uplink resource usage is worsened due to waste when CoMP is not used
Solution Approach 1:
The patent implements a feedback mechanism where the UE generates a feedback indicator based on comparing CoMP CQI and non-CoMP CQI values. This indicator is sent to the eNB to trigger CoMP CSI feedback reporting only when the comparison shows benefit, creating a feedback loop that optimizes resource usage while maintaining information availability
Solution Approach 2:
The UE autonomously determines when CoMP feedback is beneficial by performing CQI comparisons and generating feedback indicators without continuous eNB instruction. This self-service approach allows the UE to manage its own feedback reporting based on actual channel conditions, reducing unnecessary uplink transmissions
2Productivity
If CoMP operations are implemented, then cell-edge throughput is improved, but system complexity is worsened due to multiple transmission points coordination
Solution Approach 1:
The patent enables dynamic switching between CoMP and non-CoMP operations based on real-time channel conditions. The feedback indicator mechanism allows the system to adaptively activate or deactivate CoMP modes, making the system flexible rather than statically complex, thereby improving cell-edge throughput only when beneficial while managing complexity through conditional operation
3Loss of energy
If feedback indicator mechanism is implemented, then resource usage optimization is improved, but signaling overhead is worsened
Solution Approach 1:
The patent extracts only the essential feedback indicator information from the full CoMP CSI feedback process. Instead of transmitting complete CSI reports continuously, the system transmits only the condensed feedback indicator that triggers full feedback reporting when needed, removing unnecessary signaling overhead while maintaining resource optimization capability
Solution Approach 2:
The patent implements partial feedback reporting by using a simplified feedback indicator mechanism rather than full CSI feedback. This partial action approach provides sufficient information for resource optimization decisions without the excessive overhead of complete CSI reports, achieving the optimal balance between information quality and signaling efficiency
Data Source
AI summary
Embodiments provide a feedback indicator for coordinated multi-point operations of various coordinated multi-point schemes and/or scenarios. An exemplary embodiment involves generating a feedback indicator for coordinated multi-point operations, the feedback indicator indicating a recommendation for a CoMP controller entity to request signaling of multi-point feedback information with respect to multiple coordinated multi-point transmission points, and signaling the generated feedback indicator for coordinated multi-point operations to the CoMP controller entity.