Aperiodic CSI Trigger State Mapping for Carrier Aggregation
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Solution Overview
Problem
Current mobile communication networks face challenges in efficiently managing and optimizing communication protocols across diverse wireless devices and base stations, particularly in supporting multiple technologies and releases, which affects traffic handling and resource allocation.
Innovation Solution
The implementation of advanced NR user plane and control plane protocol stacks, along with flexible bandwidth management and carrier aggregation techniques, enables dynamic configuration and adaptation of communication protocols to optimize data flow and resource utilization across various wireless devices and base stations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple aperiodic CSI trigger states are configured for different serving cells, then the network can optimize channel state information reporting for carrier aggregation scenarios, but the complexity of managing and coordinating trigger states across multiple cells increases
Solution Approach 1:
The patent segments the aperiodic CSI trigger state management by introducing separate trigger state configurations for different serving cells (primary cell and secondary cells). Each serving cell can have its own aperiodic CSI trigger states configured independently, allowing the network to manage CSI reporting on a per-cell basis rather than as a monolithic configuration, thereby reducing overall management complexity while maintaining reporting accuracy.
Solution Approach 2:
The patent adds a spatial dimension to trigger state management by extending aperiodic CSI trigger state configurations across multiple serving cells in a carrier aggregation scenario. Instead of managing trigger states in a single-cell dimension, the system now operates in a multi-cell dimension, allowing independent configuration and triggering of CSI reports for each cell while maintaining coordinated management through the MAC entity.
2Productivity
If aperiodic CSI reporting is enabled for multiple serving cells, then the network gains better channel state awareness for optimized scheduling, but the signaling overhead and processing requirements increase
Solution Approach 1:
The patent implements a universal aperiodic CSI trigger mechanism that can be applied across multiple serving cells using a common configuration framework. The MAC entity maintains a unified set of aperiodic CSI trigger states that can trigger reporting across one or multiple serving cells, allowing the same trigger mechanism to serve multiple functions (single-cell and multi-cell reporting) without requiring separate dedicated signaling for each cell.
3Adaptability or versatility
If the network supports both legacy and advanced features simultaneously, then compatibility with existing devices is maintained, but the protocol stack complexity increases
Solution Approach 1:
The patent introduces dynamic capability indication mechanisms where the UE can signal its support for advanced features (such as multi-serving cell aperiodic CSI reporting) through capability information elements. The network can then dynamically adapt its configuration and operation mode based on the UE's capabilities, allowing the system to operate in a simplified legacy mode or an advanced multi-cell mode as needed, rather than always maintaining the full complex protocol stack.
Data Source
AI summary
A method may include receiving, by a wireless device, a medium-access control control element (MAC-CE) indicating mapping of aperiodic trigger states to a channel state information (CSI) codepoint. The method may include receiving downlink control information (DCI) indicating the CSI codepoint. The method may include transmitting one or more CSI reports for a first reference signal indicated by a first aperiodic trigger state of the aperiodic trigger states and a second reference signal indicated by a second aperiodic trigger state of the aperiodic trigger states.