CSI-RS Notification for Flexible UE Mobility Measurement
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Solution Overview
Problem
The existing LTE system relies on a fixed measurement manner for downlink reference signals, leading to high network overheads and inflexible detection of user equipment (UE) during cell handovers, which affects wireless communication quality and user experience.
Innovation Solution
A method and apparatus that involve sending a reference signal notification message including time resource information, particularly for CSI-RS, to enable flexible provision and effective reception of CSI-RS by UE, reducing overheads and improving mobility measurement efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed measurement manner based on downlink reference signal is used, then the measurement process is simple, but the network overhead is excessively high
Solution Approach 1:
The patent introduces dynamic reference signal configurations where the network can flexibly adjust reference signal transmission parameters (time, frequency, resource allocation) based on actual network conditions and UE requirements, replacing the fixed CRS approach with adaptable CSI-RS and other configurable reference signals that reduce unnecessary transmissions and overhead
Solution Approach 2:
The patent changes multiple parameters of reference signals including transmission periodicity, time-frequency resource allocation, antenna port configurations, and signal types (CRS to CSI-RS), allowing the system to optimize overhead by transmitting reference signals only when and where needed rather than continuously across all resources
2Ease of manufacture
If a fixed measurement manner based on downlink reference signal is used, then the implementation is straightforward, but the detection flexibility for UE is insufficient
Solution Approach 1:
The patent enables dynamic adaptation of reference signal measurement configurations to match varying UE scenarios (mobility states, service types, channel conditions), allowing UEs to flexibly detect and measure reference signals according to their specific needs while maintaining straightforward implementation through standardized procedures
Solution Approach 2:
The patent segments the unified reference signal measurement approach into multiple specialized reference signal types (CSI-RS for channel state, CRS for cell-specific measurements, TRS for tracking) with different configurations and purposes, allowing UEs to select and measure appropriate reference signals for their specific detection requirements
3Area of stationary object
If CRS is used for measurement, then the measurement coverage is comprehensive, but the signaling overhead is high
Solution Approach 1:
The patent extracts the measurement function from the comprehensive CRS and implements it through targeted CSI-RS and other specialized reference signals that provide necessary measurement coverage only in required time-frequency resources, eliminating redundant transmissions and reducing overhead while maintaining adequate measurement capability
Solution Approach 2:
The patent implements periodic reference signal transmissions with configurable periods, allowing the system to maintain measurement coverage by transmitting reference signals at optimized intervals rather than continuously, thereby reducing overhead while ensuring UEs can perform measurements at appropriate frequencies
Data Source
AI summary
Embodiments of the present invention provide a reference signal notification method, including: sending, by a network device, a reference signal notification message, where the reference signal notification message includes time resource information of a reference signal. According to the embodiments of the present invention, the reference signal notification message in the present invention is used to notify UE of a reference signal configuration, especially information about a CSI-RS, so that the network device can flexibly provide a reference signal, especially a CSI-RS, and the UE can more effectively receive the reference signal, especially the CSI-RS.