Aperiodic CSI-RS Resource Group Configuration for Synchronization
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Solution Overview
Problem
Current New Radio (NR) systems rely mainly on periodic Tracking Reference Signals (TRS) for frequency and timing synchronization, which do not effectively utilize aperiodic TRS (A-TRS) configurations, limiting their tracking/synchronization performance.
Innovation Solution
The method involves configuring Channel State Information Reference Signal (CSI-RS) resource groups with aperiodic triggering offsets, allowing terminal devices to receive CSI-RS resources in specific slots for improved frequency and timing synchronization, as indicated by configuration and indication information from network devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If periodic TRS is used for tracking/synchronization, then frequency and timing synchronization can be maintained, but tracking/synchronization performance is limited due to inability to utilize aperiodic TRS configurations
Solution Approach 1:
The patent applies dynamics by enabling the TRS to switch between periodic and aperiodic operation modes. The network device can dynamically configure aperiodic TRS resources and trigger them based on current system conditions, allowing the tracking/synchronization mechanism to adapt its behavior rather than being fixed in a periodic pattern only.
Solution Approach 2:
The patent changes the temporal parameter of TRS transmission by introducing aperiodic triggering with configurable offsets. Instead of fixed periodic intervals, the TRS transmission time is variable and can be adjusted through RRC configuration and DCI triggering, changing the time domain characteristics to improve synchronization performance.
2Measurement precision
If aperiodic CSI-RS resource groups are configured with multiple resources and slots, then tracking/synchronization performance is improved, but configuration complexity increases
Solution Approach 1:
The patent segments the aperiodic CSI-RS resources into resource groups, where each group contains multiple CSI-RS resources that can be configured with specific time-domain offsets. This segmentation allows manageable organization of multiple resources while maintaining the ability to improve synchronization performance through the collective use of resources within each group.
Solution Approach 2:
The patent applies preliminary action by pre-configuring multiple CSI-RS resources and their associated time-domain offsets through RRC signaling before actual transmission. The network device prepares the resource groups in advance, and then triggers their transmission using DCI with a triggering offset, reducing real-time configuration complexity while maintaining performance benefits.
Data Source
AI summary
An information determination method includes: receiving, by a terminal device, first configuration information sent by a network device, wherein the first configuration information is used for configuring at least one CSI-RS resource group and used for indicating a first offset for the at least one CSI-RS resource group, each CSI-RS resource group comprises P number of CSI-RS resources, the at least one CSI-RS resource group is used for determining a first signal, and the first signal occupies Q number of slots, P and Q being integers greater than or equal to 2; receiving, by the terminal device, first indication information sent by the network device, wherein the first indication information is used for triggering the terminal device to receive the first signal; and receiving, by the terminal device in response to the first indication information, the first signal according to the first configuration information.