User Terminal CSI Reference Signal Resource Contention Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation mobile communication systems, dynamically triggered reference signals for CSI reporting can lead to resource contention with other signals or channels, and existing methods do not adequately address how to handle such contention effectively.
Innovation Solution
A user terminal is designed with a receiving section for downlink shared channels and CSI reference signals, and a control section that manages the reception and measurement of CSI reference signals by ensuring that resources for downlink shared channels and CSI reference signals do not overlap, using different cells for scheduling and triggering, and applying puncture or rate-matching processing as necessary.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a reference signal is dynamically triggered to improve resource allocation flexibility, then resource allocation efficiency is improved, but resource contention with other signals or channels occurs
Solution Approach 1:
The patent applies preliminary action by checking whether resources for a dynamically triggered reference signal overlap with resources for other signals or channels before performing the measurement. The user terminal determines in advance if resource contention exists and takes appropriate action (skipping measurement or notifying the base station) to prevent interference, thus resolving the contradiction between dynamic resource allocation flexibility and resource contention.
2Measurement precision
If the user terminal performs measurement on the CSI reference signal when resources overlap, then measurement precision is maintained, but communication reliability deteriorates due to interference
Solution Approach 1:
The patent applies preliminary anti-action by proactively detecting resource overlap between CSI reference signals and other signals/channels before measurement occurs. When overlap is detected, the user terminal skips the measurement or notifies the base station, thereby preventing interference that would degrade both measurement precision and communication reliability. This preliminary protective action resolves the contradiction by avoiding the harmful condition before it can manifest.
Data Source
AI summary
To appropriately control communication even when a reference signal is dynamically triggered, a user terminal according to one aspect of the present disclosure includes: a receiving section that receives a downlink shared channel and a Channel State Information (CSI) reference signal; and a control section that, when first downlink control information used to schedule the downlink shared channel and second downlink control information used to trigger the CSI reference signal are transmitted by different cells, and resources respectively indicated by the first downlink control information and the second downlink control information overlap, performs control not to perform at least one of reception of the downlink shared channel and measurement that uses the CSI reference signal.