5G Reference Signal for Multi-Direction Beam Feedback
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Solution Overview
Problem
In 5G communication systems, user equipment (UE) can only feed back channel state information for beams in the current direction, limiting the system's performance as it cannot provide feedback for beams in other directions, impacting the effectiveness of multi-channel data transmission.
Innovation Solution
A method and apparatus that send a first-type reference signal associated with multiple channel feature hypotheses to a terminal, allowing the UE to determine and feedback channel state information for beams in various directions, enabling the indication of virtual sending beams and improving system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE feeds back channel state information only for beams in the current direction, then the feedback process is simple, but the system performance is limited and cannot support multi-channel data transmission in multiple directions
Solution Approach 1:
The patent segments the channel state information feedback by associating different hypothesis types (first-type, second-type, third-type) with different beam directions and scenarios. Each hypothesis type corresponds to specific channel features, allowing the UE to provide targeted feedback for different spatial directions without overwhelming complexity
Solution Approach 2:
The patent introduces a new dimension to the feedback process by adding channel feature hypotheses that extend beyond the current beam direction. The hypotheses include spatial quasi-co-location relationships and interference channel characteristics, enabling feedback in multiple spatial dimensions simultaneously
2Adaptability or versatility
If multiple channel feature hypotheses are associated with the reference signal, then the UE can feedback channel state information for beams in multiple directions, but the signaling overhead increases
Solution Approach 1:
The patent creates a universal feedback framework where a single reference signal can be associated with multiple hypothesis types simultaneously. The UE evaluates all applicable hypotheses and provides comprehensive feedback, making the system adaptable to various beam directions and channel conditions without requiring separate reference signals for each scenario
Solution Approach 2:
The patent changes the parameters of the reference signal by associating it with multiple channel feature hypotheses that define different spatial and interference characteristics. This allows the same reference signal to serve multiple purposes across different beam directions and channel scenarios
3Reliability
If the UE provides comprehensive channel state information feedback for all possible beams, then the system can achieve optimal performance, but the feedback complexity and processing overhead increase significantly
Solution Approach 1:
The patent performs preliminary action by pre-defining multiple channel feature hypotheses (first-type, second-type, third-type) that cover various beam directions and channel conditions. The UE is configured with these hypotheses in advance and only needs to evaluate and feedback based on the predefined hypotheses, reducing real-time processing complexity while maintaining comprehensive coverage
Data Source
AI summary
Disclosed are a method and apparatus for sending a signal, a method and apparatus for reporting channel state information, a storage medium and an electronic device. The method for sending the signal includes: a first-type reference signal is sent to a terminal, where the first-type reference signal is associated with a number N of channel feature hypotheses, and N is an integer greater than or equal to 1; and channel state information sent by the terminal is received.