Aperiodic CSI Request Field Merging for Radio Resource Efficiency
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Solution Overview
Problem
In multi-node wireless communication systems, existing methods waste radio resources by repeatedly transmitting a channel state information request field for each reference signal, especially when multiple nodes send different reference signals to user equipment.
Innovation Solution
A method where a base station requests aperiodic channel state information feedback by sending a channel state information request field only once, allowing user equipment to measure and feedback CSI for multiple reference signals, thereby preventing resource wastage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a base station requests aperiodic channel state information feedback by transmitting a channel state information request field in each downlink subframe where a reference signal is transmitted, then user equipment can measure and feedback CSI for multiple reference signals transmitted by different nodes, but radio resources are wasted due to repeated transmission of the request field
Solution Approach 1:
The patent merges multiple CSI request operations into a single request field transmission. Instead of transmitting separate CSI request fields in each downlink subframe where reference signals are transmitted, the base station transmits one CSI request field that triggers user equipment to measure and feedback CSI for multiple reference signals from different nodes, thereby eliminating redundant request transmissions and improving radio resource efficiency
Solution Approach 2:
The patent enhances the functionality of the CSI request field by making it a universal trigger for multiple CSI measurements. A single CSI request field configuration enables user equipment to perform channel state information measurement and feedback for multiple reference signals transmitted by different nodes, allowing one control element to serve multiple measurement purposes simultaneously
Data Source
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AI summary
The present invention provides a method of user equipment transmitting aperiodic channel state information and user equipment using the method. The method includes receiving a channel state information request for a plurality of reference signals, receiving the plurality of reference signals, generating channel state information on each of the plurality of reference signals in response to the channel state information request, and transmitting the channel state information through a Physical Uplink Shared Channel (PUSCH), wherein the channel state information request is included in only some of subframes in which the plurality of reference signals is received.