QCL RS Resource Mapping for Short-Offset Wireless Reception
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Solution Overview
Problem
The challenge of determining a quasi co-located RS resource for signal reception when the offset between scheduling or triggering signaling is smaller, particularly in 5G networks, is not adequately addressed by existing technologies, impacting network energy efficiency and reliability.
Innovation Solution
A method and apparatus for wireless communication that determines a quasi co-located RS resource based on an index, utilizing QCL parameters with PDCCH for CORESETs or TCI states, ensuring reliable signal reception and energy savings by simplifying system design and maintaining backward compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the offset between scheduling signaling and signal reception is reduced to improve transmission speed, then the time for determining QCL parameters is insufficient, but transmission reliability deteriorates
Solution Approach 1:
The patent applies preliminary action by pre-configuring QCL parameter sets and association relationships between DCI formats and QCL sets before actual transmission. When scheduling signaling is received, the terminal can immediately determine the appropriate QCL parameters without waiting for additional signaling, thus maintaining fast transmission speed while ensuring reliable parameter determination.
2Adaptability or versatility
If multiple QCL parameter sets are configured to improve adaptability, then the system flexibility increases, but the device complexity increases
Solution Approach 1:
The patent segments the QCL parameter configuration into multiple independent sets, each associated with specific DCI formats or service types. This allows the terminal to select and process only the relevant QCL set based on the received scheduling signaling, achieving high adaptability while reducing the complexity of processing all possible configurations simultaneously.
Solution Approach 2:
The patent introduces an intermediary mapping relationship between DCI formats and QCL parameter sets. This intermediary layer simplifies the complexity by providing a clear association rule that the terminal can follow, rather than requiring complex direct configuration management between multiple QCL sets and various signal types.
3Reliability
If a unified QCL determination method is applied to improve reliability, then transmission reliability improves, but the adaptability to different scenarios decreases
Solution Approach 1:
The patent implements a dynamic QCL determination method where the terminal first attempts to determine QCL parameters based on the unified method using DCI format associations. If this fails or is not applicable, the terminal can fall back to alternative determination methods. This dynamic approach ensures reliability through the primary unified method while maintaining adaptability through fallback options for different scenarios.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus used in a node for wireless communication. The method comprises: a first node receiving a first information block; receiving first signaling; and receiving a first signal, wherein the first signaling is used for scheduling the first signal, or the first signaling is used for triggering the first signal; the offset between the reception of the first signaling and the reception of the first signal is less than a first threshold value, and the first signal and a first RS resource are quasi co-located; and the first information block is used for determining at least one index, and the first RS resource depends on the at least one index. By means of the method, an antenna port group used for the reception quality of a PDSCH and an aperiodic CSI-RS can be determined, thereby improving the transmission reliability, and improving the flexibility of a system.