Tracking Reference Signal Offset Configuration for Wireless Latency Reduction
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Solution Overview
Problem
Current wireless communication systems face challenges in providing fast and efficient reference signal (RS) information and channel state information (CSI) feedback during cell activation, leading to increased latency and resource inefficiencies due to complex signaling procedures.
Innovation Solution
The method involves transmitting and receiving tracking reference signals (TRS) with offset information to facilitate faster cell activation and CSI feedback, utilizing advanced MAC control elements (CE) to efficiently trigger TRS and CSI-RS, and applying quasi-co-location (QCL) assumptions for streamlined SCell activation processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex signaling procedures are used for cell activation, then reference signal information can be provided, but latency increases and efficiency decreases
Solution Approach 1:
The network pre-configures multiple TRS burst patterns with different offset values before cell activation. When activation is needed, the terminal can immediately use the pre-configured pattern without waiting for new configuration, thus reducing latency while maintaining reliable reference signal provision.
Solution Approach 2:
The patent introduces offset information as a configurable parameter that determines the timing of TRS bursts. By changing the offset parameter, the system can adapt the reference signal transmission timing to reduce latency while ensuring reliable signal provision for cell activation.
2Measurement precision
If multiple TRS bursts are transmitted, then channel state information feedback is improved, but signaling complexity increases
Solution Approach 1:
The TRS transmission is divided into multiple bursts with different offset values. Each burst provides measurements for specific timing conditions, allowing the terminal to select the most appropriate burst for CSI feedback. This segmentation improves measurement precision for different scenarios while keeping the signaling structure manageable through systematic organization.
Solution Approach 2:
The system transmits multiple TRS bursts (excessive action) to ensure that at least one burst provides optimal measurement conditions for CSI feedback. The terminal can then use partial information from the most suitable burst, achieving high measurement precision without requiring the network to process all burst configurations.
3Speed
If offset information is provided for each burst, then TRS reception timing is optimized, but information overhead increases
Solution Approach 1:
The offset information is transmitted as configurable parameters that define the timing of TRS bursts. By optimizing these parameter values, the system achieves precise TRS reception timing while keeping the parameter representation compact, thus balancing speed optimization with overhead control.
Data Source
AI summary
A method and an apparatus for transmitting or receiving a reference signal in a wireless communication system are disclosed. A method of receiving a tracking reference signal (TRS) by a terminal in a wireless communication system according to an embodiment of the present disclosure may comprise: receiving, from a network, at least one of first offset information related to at least one burst of the TRS, or second offset information related to the at least one burst; and receiving, from the network, the TRS in the at least one burst, wherein the first offset information is related to a first burst of the at least one burst, wherein, based on the second offset information being absent, a number of the at least one burst is one, and wherein, based on the second offset information being present, the second offset information indicates an offset between the first burst and a second burst.