Early CSI Triggering for Timely 5G Channel Reporting
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing channel state information (CSI) measurement and reporting, particularly in 5G/NR systems, which are crucial for optimizing radio interface efficiency and coverage to meet the growing demand for wireless data traffic.
Innovation Solution
The implementation of early triggering of CSI measurement and reporting through UE and base station configurations, including the use of CSI report configurations and indicators to determine CSI-RS and UL resources, enabling timely and efficient CSI acquisition and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If early triggering of CSI measurement and reporting is implemented, then radio interface efficiency and coverage are improved, but system complexity increases due to additional signaling and resource management requirements
Solution Approach 1:
The patent applies preliminary action by triggering CSI measurement and reporting before the actual data transmission occurs. The base station sends a trigger indicator that initiates CSI acquisition in advance, allowing the UE to measure and report channel state information proactively. This early triggering enables the network to have CSI ready when needed, improving radio interface efficiency without waiting for traditional periodic reporting cycles.
Solution Approach 2:
The patent introduces an intermediary trigger indicator mechanism that mediates between the base station's need for CSI and the UE's measurement capabilities. This intermediary signaling element (the trigger indicator) coordinates the timing and resources for CSI acquisition, allowing flexible on-demand triggering while managing the complexity of resource allocation between CSI-RS resources and uplink reporting resources.
2Loss of time
If early CSI acquisition is triggered, then measurement timing is optimized, but resource allocation complexity increases due to coordination of CSI-RS and UL resources
Solution Approach 1:
The patent reduces measurement timing loss by triggering CSI acquisition in advance of when the CSI is actually needed. The trigger indicator initiates the measurement process early, allowing the UE to complete measurements and reports before data transmission begins. This proactive timing optimization ensures fresh channel state information is available, reducing the time loss associated with waiting for periodic reports.
Solution Approach 2:
The patent applies dynamics by making the resource allocation flexible and adaptive. Instead of fixed periodic reporting, the system dynamically allocates CSI-RS resources and uplink reporting resources based on actual network needs. The trigger indicator enables on-demand activation of measurement resources, allowing the system to adapt resource allocation to varying traffic conditions and channel volatility, thereby optimizing measurement timing while managing resource complexity.
Data Source
AI summary
Methods and apparatuses for early triggering of channel state information (CSI) measurement and reporting. A method performed by a user equipment (UE) includes receiving, in a first signaling, one or more CSI report configurations for early CSI acquisition and receiving, in a second signaling, an indicator to trigger the early CSI acquisition. The method further includes determining, based on the one or more CSI report configurations and the indicator, one or more CSI reference signal (CSI-RS) resources and one or more uplink (UL) resources. The method further includes determining, based on measurements of the one or more CSI-RS resources, a CSI report and transmitting, via the one or more UL resources, the CSI report.