Dynamic Reporting Settings in CoMP Wireless Systems
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Solution Overview
Problem
RRC signaling, used for notifying control information in CoMP transmission, cannot follow environmental changes such as changes in traffic volume and UE distribution, leading to suboptimal reporting settings and reduced performance enhancement effects.
Innovation Solution
A wireless communications system where multiple pieces of reporting setting information for channel state information are notified to a reception station, allowing transmission stations and the reception station to share and quickly adapt reporting settings through RRC and L1/L2 signaling, enabling dynamic adjustment based on changing environmental conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RRC signaling is used for notifying reporting settings in CoMP transmission, then control information can be transmitted reliably, but the reporting settings cannot be changed quickly to follow environmental changes such as traffic volume and UE distribution
Solution Approach 1:
The patent makes the reporting setting notification mechanism dynamic by introducing L1/L2 signaling as a supplement to the static RRC signaling. The system can switch between RRC signaling for stable configurations and L1/L2 signaling for rapid adjustments, allowing the reporting settings to adapt dynamically to changing environmental conditions while maintaining reliable control information transmission
Solution Approach 2:
The patent segments the reporting setting notification process into two parts: RRC signaling for semi-static configuration and L1/L2 signaling for dynamic updates. This segmentation allows each signaling type to operate in its optimal regime, with RRC providing reliable baseline settings and L1/L2 enabling quick adaptations without compromising the overall system reliability
2Reliability
If RRC signaling is used for notifying reporting settings, then control information can be transmitted with established protocols, but the notification cycle is long (minimum 100 ms) causing delay in responding to environmental changes
Solution Approach 1:
The patent uses RRC signaling to pre-configure multiple reporting settings in advance, storing them in the UE's memory. When environmental changes occur, the system can quickly activate a pre-configured setting via L1/L2 signaling without going through the lengthy RRC reconfiguration process, thus reducing the time loss while maintaining the reliability of control information transmission
Solution Approach 2:
The patent creates a dynamic reporting setting update mechanism by combining RRC's reliable but slow configuration with L1/L2's fast but supplementary notification. This dynamic approach allows the system to respond quickly to environmental changes (reducing time loss) while maintaining the reliability established by RRC signaling protocols
Data Source
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AI summary
A method for controlling reporting setting that enables reporting setting to be changed quickly in a system where CoMP transmission is performed, as well as a wireless communications system using the same are provided. In a wireless communications system based on a coordinated transmission scheme in which multiple transmission stations included in a network perform transmission in coordination with each other, the network notifies multiple pieces of reporting setting information for channel state information to a reception station that is a target of the coordinated transmission scheme, and the transmission stations and the reception station share reporting setting information to be applied among the multiple pieces of reporting setting information.