Terminal Aperiodic CSI Update Control for TDD Complexity
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Solution Overview
Problem
The existing wireless communication systems, particularly in LTE Release 10, face high terminal complexity and costs due to excessive computation requirements when determining channel state information (CSI) in Time Division Duplex (TDD) mode, especially with the introduction of new transmission modes and interference measurement resources.
Innovation Solution
The method involves determining the number of aperiodic CSI processes to update based on the UE's processing capability and configured CSI processes, limiting computation and signaling overhead, allowing for reasonable terminal complexity and costs without increasing system complexity or overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE updates all configured aperiodic CSI processes in TDD mode, then the channel state information accuracy is improved, but the terminal complexity and computation requirements increase excessively
Solution Approach 1:
The patent extracts and updates only the necessary subset of aperiodic CSI processes rather than all configured processes. The network device determines which CSI processes need updating based on current transmission requirements, separating the essential updates from unnecessary ones, thereby reducing terminal computation while maintaining channel state accuracy.
Solution Approach 2:
Instead of performing complete CSI updates for all processes, the patent applies partial action by updating only the required number of aperiodic CSI processes. This partial update approach provides sufficient channel state information for current transmissions without the excessive computation burden of updating all configured processes.
2Adaptability or versatility
If the network configures more aperiodic CSI processes, then the channel measurement capability is improved, but the signaling overhead and system complexity increase
Solution Approach 1:
The patent implements dynamic determination of the number of aperiodic CSI processes to update. Rather than using a fixed configuration, the network device adaptively decides how many CSI processes require updates based on current channel conditions, transmission mode, and interference scenarios, optimizing the balance between measurement capability and signaling overhead.
Solution Approach 2:
The patent changes the parameter of the number of updated CSI processes dynamically. The network device adjusts this parameter based on transmission requirements, effectively controlling the trade-off between channel measurement capability and signaling overhead without requiring permanent configuration changes.
Data Source
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AI summary
A method and terminal for determining channel state information are disclosed. The method includes: a terminal receiving an aperiodic channel state information CSI request, determining a parameter X according to a capability of the terminal processing a CSI process and/or the number of CSI processes y configured currently, and updating up to X aperiodic CSI according to the parameter X; wherein the parameter X is: a total number of CSI processes or reports required to be updated by the terminal at the same moment in one or more aperiodic CSI requests.