Aperiodic CSI-RS Configuration via Timeslot Offset
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Solution Overview
Problem
Current CSI-RS sending methods in NR communications systems are inefficient, leading to wastage of uplink resources and limited system efficiency due to frequent triggering and reporting requirements, especially when scanning multiple beams, as they are limited by terminal device capabilities.
Innovation Solution
Configuring a timeslot offset for CSI-RS resource sets to allow for aperiodic CSI-RS transmission, enabling the network device to send reference signals in different timeslots based on configuration information sent to the terminal device, reducing the need for frequent triggering and reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple CSI-RS resource sets are configured to send respective CSI-RSs in different timeslots for beam scanning, then beam measurement capability is improved, but uplink resource waste increases and system efficiency decreases
Solution Approach 1:
The patent combines multiple CSI-RS resource sets into a single resource set, allowing multiple CSI-RS resources to be configured within one resource set. This enables beam scanning across multiple timeslots without requiring multiple separate resource set configurations, thereby reducing signaling overhead and improving system efficiency while maintaining beam measurement capability
Solution Approach 2:
The patent makes a single CSI-RS resource set capable of serving multiple beam scanning purposes by configuring multiple CSI-RS resources within it. Each CSI-RS resource can be assigned different time domain offsets to schedule transmissions in different timeslots, allowing one resource set to perform the function previously requiring multiple resource sets
2Adaptability or versatility
If frequent triggering and reporting are required for beam scanning, then beam measurement coverage is improved, but uplink resource consumption increases
Solution Approach 1:
The patent introduces dynamic time domain offset configuration for CSI-RS resources, allowing flexible scheduling of CSI-RS transmissions across different timeslots. This dynamic timing control enables comprehensive beam measurement coverage while optimizing uplink resource usage by avoiding unnecessary frequent transmissions and reporting
3Productivity
If aperiodic CSI-RS transmission is used with timeslot offset configuration, then system efficiency is improved, but configuration complexity increases
Solution Approach 1:
The patent introduces time domain offset parameters (timeDomainOffset) for CSI-RS resources within a resource set, enabling flexible aperiodic transmission scheduling. By configuring different timeDomainOffset values for different CSI-RS resources, the system achieves improved efficiency through optimized timing while the parameter-based approach keeps configuration manageable through standardized signaling mechanisms
Data Source
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AI summary
This application discloses a reference signal configuration method and apparatus. Before a network device sends reference signals aperiodically, the network device sends configuration information to a terminal device, where the configuration information is used to indicate a timeslot offset of one or more reference signal resource sets. Therefore, the network device can flexibly send reference signals in different timeslots, thereby reducing a quantity of times of reference signal triggering and measurement result reporting, and improving efficiency of a communications system.