Time-Domain Channel Property Reporting for High-Speed UE Scheduling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in downlink scheduling due to unreliable channel state information (CSI) reports from user equipment (UEs) moving at high speeds, leading to reduced transmission efficiency.
Innovation Solution
Configuring UEs to transmit time domain channel property (TDCP) reports to network entities for improved downlink scheduling, based on measurements of tracking reference signals (TRS).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If UEs move at high speeds through the wireless network, then data transmission and mobility are enabled, but channel state information becomes unreliable leading to reduced transmission efficiency
Solution Approach 1:
The system performs preliminary measurements of time domain channel properties using tracking reference signals before downlink scheduling decisions are made. These preliminary measurements provide advance information about channel conditions, allowing the network to prepare more reliable scheduling decisions even for high-speed moving UEs.
Solution Approach 2:
The UE feeds back measured time domain channel property values to the network entity. This feedback mechanism provides continuous information about channel conditions, enabling the network to adapt scheduling decisions to current channel states and maintain transmission efficiency despite UE mobility.
2Measurement precision
If traditional CSI reporting methods are used for high-speed UEs, then reporting overhead is maintained at current levels, but downlink scheduling accuracy degrades due to unreliable channel information
Solution Approach 1:
Instead of using traditional CSI parameters, the system measures and reports time domain channel property values derived from tracking reference signals. This parameter change provides more reliable information for high-speed scenarios where traditional CSI becomes unreliable, thereby improving downlink scheduling accuracy.
3Measurement precision
If TDCP measurement and reporting is implemented, then downlink scheduling accuracy improves, but device complexity and processing requirements increase
Solution Approach 1:
The UE uses its existing capability to measure and process tracking reference signals for the purpose of determining time domain channel properties. By reusing existing signal processing functions, the system avoids adding significant complexity while still achieving improved measurement precision for downlink scheduling.
Data Source
AI summary
This disclosure provides systems, devices, apparatus, and methods, including computer programs encoded on storage media, for TDCP measurement and reporting techniques. A UE (102) receives (312) a TRS from a network entity (304) through a channel between the network entity (304) and the UE (102). The UE (102) measures, based on the received (312) TRS, a TDCP of the channel between the network entity (304) and the UE (102). A measurement (314) of the TDCP of the channel is associated with at least one of: a configured reporting quantity for a TDCP report, a CSI processing unit duration for the TDCP report, or a minimum processing delay for the TDCP report. The UE (102) transmits (316) the TDCP report to the network entity (304) based on the measurement (314).